CN115247709A

CN115247709A - Non-diaphragm shaft-rod shaft-sleeve spring Z-shaped liquid control valve

Info

Publication number: CN115247709A
Application number: CN202011486826.5A
Authority: CN
Inventors: 张磊
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2022-10-28
Also published as: IL303516A; WO2022127577A1

Abstract

The invention discloses a diaphragm-free shaft sleeve and shaft sleeve spring Z-shaped liquid control valve. The liquid control valve comprises a cover, a body, a sealing ring groove, a sealing ring, a piston, an extending end face below the piston and a body outlet end inner cavity spigot; the sealing ring groove is arranged on the cover, or on the body, or on the cover and the body simultaneously, or on a seat between the cover and the body simultaneously, or on the cover and the seat simultaneously, or on the seat and the body simultaneously, or on the cover, the seat and the body simultaneously; the sealing ring is arranged in the sealing ring groove, the piston is arranged in the sealing ring, the cover and the body or the cover, the seat and the body are sealed into a whole, and the piston and the extending end face below the piston form a whole. The invention does not need to use a diaphragm, a shaft lever, a shaft sleeve and a spring, and has simple structure and small head loss.

Description

Non-diaphragm shaft-rod shaft-sleeve spring Z-shaped liquid control valve

Technical Field

The invention relates to a Z-shaped liquid control valve without a diaphragm shaft sleeve spring, in particular to a liquid control valve without a diaphragm shaft sleeve spring, which can meet the requirements of various liquid flowing working conditions through different processing structures and the assembly form of a sealing ring.

Background

The existing liquid control valve needs to use a diaphragm, a shaft lever, a shaft sleeve and a spring; the flowing direction of the liquid can only control the valve in one way during operation; the static liquid flow cannot be set under the conditions required by the working conditions.

The existing liquid control valve is provided with a diaphragm to push a cut-off pressing plate connected with a shaft rod to close and open the valve, once the diaphragm is damaged and replaced quite difficultly, the diaphragm can be replaced by professional technicians, particularly, the diaphragm of the large-caliber valve is more difficult to replace, and the diaphragm for manufacturing the large-caliber liquid control valve and the processing cost are quite high.

The existing liquid control valve needs to be provided with a shaft lever and a shaft sleeve to guide and push a closure pressing plate connected with the shaft lever to effectively close and open the valve, and because the shaft lever and the shaft sleeve need to be arranged, the scaling phenomenon is easily generated in a large amount of liquid, and the valve is easily closed or opened to lose efficacy.

The existing liquid control valve only controls the valve in a one-way mode in the flowing direction of liquid during operation, so that the application range has a plurality of limitations.

The existing liquid control valve needs to use a spring to reset and increase the stability when the valve is closed, and the elasticity of the spring can cause certain pressure loss of the starting pressure for opening the valve, so that the starting pressure requirement is large, the head loss of the valve is large, and the valve can only be used in a specific working condition.

Disclosure of Invention

The diaphragm-free shaft rod shaft sleeve spring liquid control valve overcomes the technical defects of the current liquid control valve, and forms a brand-new diaphragm-free shaft rod shaft sleeve spring Z-shaped liquid control valve which can meet the requirements of various liquid flowing working conditions by processing and assembling types through different structures without using a diaphragm, a shaft rod, a shaft sleeve and a spring. Under the condition that the working condition needs, the liquid flowing direction can pass through the Z-shaped liquid control valve of the diaphragm-free shaft sleeve spring in a one-way or two-way mode, and the Z-shaped liquid control valve of the diaphragm-free shaft sleeve spring can be closed in the one-way or two-way mode; the Z-shaped liquid control valve without the diaphragm, the shaft rod, the shaft sleeve and the spring can set the static liquid flow under the condition of working condition requirement.

The invention relates to a Z-shaped liquid control valve of a diaphragm-free shaft sleeve spring, which comprises a cover, a body, a sealing ring groove, a sealing ring, a piston, an end surface extending below the piston and a spigot of an inner cavity at the outlet end of the body. The sealing ring groove is arranged on the cover, the sealing ring is arranged on the cover and the body, the piston is arranged in the sealing ring, a whole body is arranged between the piston and the piston below extension end face, the whole body is arranged between the cover and the body, the piston inner cavity and the body outlet end inner cavity are sealed, the sealing ring outer ring and the sealing ring groove are sealed, the sealing ring inner ring and the piston outer ring are sealed and slidably sealed, the body inlet end inner cavity and the body outlet end inner cavity are sealed, and the piston below extension end face is matched and sealed with the body outlet end inner cavity spigot after the piston moves. The inner cavity of the piston is connected with the inner cavity of the body inlet end and the inner cavity of the body outlet end through pipelines, valves are connected, and guide valves are connected. The piston inner cavity is connected with the body inlet end inner cavity and the body outlet end inner cavity through pipelines, the valves are connected, and the pilot valve connection can form a liquid control valve meeting different working condition requirements.

The piston is characterized in that a sealing surface I is arranged on the extending end face below the piston, the sealing of the outer ring of the sealing ring and the groove of the sealing ring means that the outer ring of the sealing ring has elastic retention and is in contact sealing with the groove of the sealing ring, the static sealing and sliding sealing of the inner ring of the sealing ring and the outer ring of the piston means that the inner ring of the sealing ring has elastic retention and is in contact static sealing and sliding sealing with the outer ring of the piston, the outer ring of the sealing ring and the inner ring of the sealing ring have elastic retention, once the expansion opening of the sealing ring is pressed by liquid, the sealing ring can expand and contract along with the increase and decrease of the liquid pressure, if the expansion opening of the sealing ring is pressed by the liquid pressure in the opposite direction, the sealing ring is arranged in the groove of the sealing ring, the expansion opening of the sealing ring faces towards the inner cavity of the piston or the opposite direction towards the inner cavity of the piston, and the cover, the body or the cover, the seat and the body are sealed and fixed into a whole. The inner cavity of the piston is connected with the inner cavity of the body inlet end and the inner cavity of the body outlet end through a pipeline with a valve or directly connected through a pipeline, the valve is connected, and the pilot valve is connected.

In some embodiments of the invention, the sealing ring groove plane is circular, the cross-sectional structural shape is concave, the sealing ring plane is circular, the cross-sectional shape is V-shaped, the piston plane is circular, the cross-sectional shape is U-shaped, the outlet end cavity spigot plane is circular, the outlet end cavity spigot inner diameter is smaller than the piston outer diameter, the sealing ring groove plane is parallel to the body outlet end cavity spigot ring plane spacing and has the same centerline position, the sealing ring groove ring plane centerline position is the same as and perpendicular to the centerline position of the piston disposed in the sealing ring, the piston disposed in the sealing ring piston outer ring is in contact with the sealing ring inner ring, the piston inner diameter opening of the piston disposed in the sealing ring is oriented towards the piston inner cavity or towards the piston inner cavity, the piston and piston vertically connected and fixed as a whole with the piston lower extension end face, the lower extension end face has a sealing face, the sealing ring and sealing ring sealing groove sealing has an elastic retaining sealing groove for contacting the sealing ring groove, the sealing ring and the sliding sealing ring has an elastic retaining sealing ring for contacting with the outer ring and the sealing ring to expand towards the piston inner cavity, the piston inner ring, the sealing ring is installed with the piston. The cover and the body are connected and fixed into a whole in a sealing way. The inner cavity of the piston is connected with the inner cavity of the body inlet end and the inner cavity of the body outlet end through pipelines, valves are connected, and guide valves are connected. The piston inner cavity is connected with the body inlet end inner cavity and the body outlet end inner cavity through pipelines, the valves are connected, and the pilot valve connection can form a liquid control valve meeting different working condition requirements.

Sealing ring groove processing structure and sealing ring assembly structure description:

the following 14 types of the seal ring groove processing structure and the seal ring assembling structure are provided, but the types of the seal ring groove processing structure and the seal ring assembling structure can be changed according to requirements in the manufacturing and installation processes of the valve, but the scope of the invention is beyond the range of the type change of the seal ring groove processing structure and the seal ring assembling structure of the invention when the basic structure principle of the invention is followed.

In some embodiments of the invention, the sealing ring grooves are processed on the cover, the body and the cover, the processing mode is one of three, the number of the processing sealing ring grooves is 1 or more than 1, the number of the installed sealing rings is the same as that of the processed sealing ring grooves, the types of the installed sealing rings are matched, the cover and the body are fixedly connected into a whole by screws, and the sealing is sealed by sealing strips. The sealing ring groove can also be simultaneously arranged and processed on the cover and the body, or arranged and processed on the seat between the cover and the body, or simultaneously arranged and processed on the cover and the seat, or simultaneously arranged and processed on the seat and the body, or simultaneously arranged and processed on the cover, the seat and the body, or simultaneously arranged on the cover and the body, and the seat between the cover and the body is not arranged. The processing form is eight to one.

In some embodiments of the invention, a seat is added between the cover and the body, the sealing ring groove is processed on the seat, the cover and the seat, the seat and the body, the cover, the seat and the body, the processing mode is selected from five, the number of the processing sealing ring grooves is 1 or more than 1, the number of the installed sealing rings is the same as that of the processed sealing ring grooves, the types of the installed sealing rings are matched, the cover, the seat and the body are fixedly connected into a whole by screws, and the sealing is sealed by sealing strips.

In some embodiments of the invention, the sealing ring groove is processed on the I-shaped sealing ring groove seat, the number of the processed sealing ring grooves is 1 or more than 1, the number of the installed sealing rings is the same as that of the processed sealing ring grooves, the types of the installed sealing rings are matched, the I-shaped sealing ring groove seat and the body are fixedly connected into a whole by screws in a sealing way, the sealing is sealed by sealing strips, the cover and the body are fixedly connected into a whole by screws in a sealing way, and the sealing is sealed by sealing strips.

In some embodiments of the invention, a II-type sealing ring groove seat is additionally arranged between the cover and the body, the sealing ring groove is processed on the II-type sealing ring groove seat, the number of the processed sealing ring grooves is 1 or more than 1, the number of the installed sealing rings is the same as that of the processed sealing ring grooves, the types of the installed sealing rings are matched, the cover, the II-type sealing ring groove seat and the body are fixedly connected into a whole by screws, and the sealing is sealed by sealing strips.

In some embodiments of the present invention, 1 cut-off opening is arranged above or below the sealing ring groove, a ring plane of the cut-off opening is parallel to a ring plane of the sealing ring groove, a center line position is the same, an upper outward extending part of the piston or a lower end surface of the piston is inosculated and sealed with the cut-off opening after the piston moves downwards, meanwhile, a lower extending end surface of the piston is inosculated and sealed with a body outlet end inner cavity cut-off opening, an upper outward extending part of the piston is provided with a sealing surface ii, a lower end surface of the piston is provided with a sealing surface iii, the cover and the body are fixedly connected into a whole by screws, and the sealing is sealed by a sealing strip.

In some embodiments of the present invention, a seat is added between the cover and the body, a cut-off port is arranged on the seat, the ring plane of the cut-off port is parallel to the ring plane of the sealing ring groove, the center line position is the same, the upper outward extension part of the piston or the lower end surface of the piston is inosculated and sealed with the cut-off port after the piston moves downwards, meanwhile, the lower extension end surface of the piston is inosculated and sealed with the inner cavity cut-off port of the body outlet end, the upper outward extension part of the piston is provided with a sealing surface II, the lower end surface of the piston is provided with a sealing surface III, the cover, the seat and the body are fixedly connected into a whole by screws, and the sealing is sealed by sealing strips.

In some embodiments of the invention, a shaft is mounted on the cover and extends into the inner cavity of the piston, the contact part of the shaft and the cover is sealed, and the shaft can move up and down by rotating the hand wheel.

In some embodiments of the invention, the piston inner cavity and the body inlet end inner cavity, and the piston inner cavity and the body outlet end inner cavity are connected through a pipeline with a valve or directly connected through a pipeline; preferably, the valve is provided with an electric actuator, and the manual valve opening and closing is replaced by the electric actuator.

The inner cavity of the piston is connected with the inner cavity of the body inlet end and the inner cavity of the body outlet end through pipelines and valves, and the connection form of the pilot valve is described as 1:

the piston inner cavity is connected with the body inlet end inner cavity and the body outlet end inner cavity through pipelines, the valves are connected, and the pilot valve connection can form a diaphragm-free shaft rod shaft sleeve spring Z-shaped liquid control valve meeting the requirements of different working conditions. The invention has following 9 connection forms of pipe connection, valve connection and pilot valve connection, but the invention is not limited to the 9 connection forms of pipe connection, valve connection and pilot valve connection, and the connection forms of pipe connection, valve connection and pilot valve connection which are correspondingly changed can be used for connecting the pipe, the valve and the pilot valve connection according to the requirement of working conditions and meeting the requirement of the required working conditions.

The inner cavity of the piston is connected with the inner cavity of the body inlet end and the inner cavity of the body outlet end through pipelines and valves, and the connection form of the pilot valve is as follows:

the manufacturing structure of the invention can use the pipeline connection, valve connection and pilot valve connection of the invention to form a diaphragm-free shaft sleeve spring Z-shaped liquid control valve meeting the requirements of different working conditions; the invention also provides a manufacturing structure which is used for correspondingly changing the connection mode of the piston inner cavity, the body inlet end inner cavity and the body outlet end inner cavity according to the working condition requirement, wherein the connection mode comprises the connection of the piston inner cavity, the body inlet end inner cavity and the body outlet end inner cavity through pipelines, the connection of a valve, and the connection of a pilot valve, which can meet the required working condition requirement.

In some embodiments of the invention, the inner cavity of the piston is connected with a three-way valve through a pipeline I, one outlet of the three-way valve is connected with the inner cavity of the body inlet end through a pipeline I and/or a check valve, and the other outlet of the three-way valve is connected with the inner cavity of the body outlet end through a pipeline I.

In some embodiments of the present invention, the piston inner cavity is connected to the body inlet end inner cavity through a pipe i and an inlet two-way valve i, and the piston inner cavity is connected to the body outlet end inner cavity through a pipe i and an outlet two-way valve ii.

In some embodiments of the present invention, the inner cavity of the piston is connected to the inner cavity of the inlet end of the check valve connector through a pipe i, an inlet two-way valve i and a half-closed valve, and the inner cavity of the piston is connected to the inner cavity of the outlet end of the check valve connector through a pipe i, an outlet two-way valve ii and a half-closed valve.

In some embodiments of the invention, the inner cavity of the piston is connected with a tee joint I through a two-way valve IV, two outlets of the tee joint I are both provided with a check valve, the outlet of one check valve enters the inner cavity of the inlet end through a connector of a pipeline I, and the outlet of the other check valve enters the inner cavity of the outlet end through a connector of a pipeline I; the inner cavity of the piston is connected with a tee joint II through a two-way valve V, two outlets of the tee joint II are respectively provided with a check valve, the outlet of one check valve is connected with the inner cavity of the inlet end of the valve body through a pipeline I, and the outlet of the other check valve is connected with the inner cavity of the outlet end of the connector through a pipeline I.

In some embodiments of the invention, the piston inner cavity is connected with the inlet end inner cavity through a pipeline I and an inlet end two-way valve I, the piston inner cavity is connected with the ball float valve through an outlet end two-way valve II and a pipeline I, and the body outlet end inner cavity is connected with the pipeline II to the liquid pool through a flange.

In some embodiments of the present invention, the piston cavity is connected to an outlet of a three-way pilot valve through a check valve and a pipeline i, another outlet of the three-way pilot valve is connected to a liquid inlet end of the pump through a pipeline i, an inlet of the three-way pilot valve is connected to the inlet cavity through a pipeline i and an inlet two-way valve i connector, and the piston cavity is connected to the outlet cavity through a pipeline i and an outlet two-way valve ii connector.

In some embodiments of the present invention, the piston cavity is connected to an inlet of a two-way valve through a pipe i, an outlet of the two-way valve is connected to an outlet cavity of a connector of the pipe i through an outlet two-way valve ii, and the inner cavity of the piston is connected to an inlet cavity through a connector of the pipe i and an inlet two-way valve i, and a screw is arranged on the top of the two-way valve.

In some embodiments of the invention, the inner cavity of the piston is connected with one outlet of the three-way pilot valve through a pipeline I, the other outlet of the three-way pilot valve is connected with the inlet of the three-way pilot valve through an outlet two-way valve II and an outlet inner cavity of a connector of the pipeline I, the inner cavity of the body inlet is connected with the inlet of the three-way pilot valve through an inlet two-way valve I and a pipeline I, the inner cavity of the piston is connected with the outlet inner cavity of the connector of the pipeline I through a two-way valve III, and the top of the three-way pilot valve is provided with a screw rod.

By using the Z-shaped liquid control valve without the diaphragm, the processing structure and the assembling method can enable the diaphragm of the liquid control valve to be replaced by the sealing ring, and navigation of the shaft lever and the shaft sleeve is not needed, so that the assembling becomes convenient; after the Z-shaped liquid control valve of the diaphragm-free shaft sleeve spring is installed and used, if a sealing ring and a piston are damaged, due to the unique manufacturing and assembling method, the maintenance is very convenient, and professional technicians are not required to replace the Z-shaped liquid control valve, so that the service life of the Z-shaped liquid control valve of the diaphragm-free shaft sleeve spring can be basically the same as that of a pipeline.

The Z-shaped liquid control valve without the diaphragm, the shaft sleeve and the spring has the advantages that the fault rate of the liquid control valve is reduced due to the unique design, and the application range of the liquid control valve is enlarged.

In the aspect of manufacturing, the Z-shaped liquid control valve without the diaphragm, the shaft lever and the shaft sleeve has simple manufacturing and low cost because the Z-shaped liquid control valve without the diaphragm, the shaft lever and the shaft sleeve is not provided with the diaphragm, the shaft lever and the shaft sleeve; especially, the grade of equipment needed to be used in the manufacture of the large-opening liquid control valve can be greatly reduced, so that the liquid control valve with an ultra-large diameter can be manufactured.

The structure and the assembly method of the Z-shaped liquid control valve without the diaphragm shaft sleeve spring can enable the liquid control valve to be a single component to be assembled on site, and particularly can greatly reduce the transportation and installation cost in the transportation and installation of large valves.

The structure of the Z-shaped liquid control valve without the diaphragm, the shaft lever, the shaft sleeve and the spring can ensure that the liquid control valve does not need to be provided with the diaphragm, the shaft lever, the shaft sleeve and the spring; the liquid can pass through the valve in one or two directions, and the valve is closed in one or two directions; the liquid flow and pressure can be dynamically and statically controlled, so that the application range of the liquid control valve can meet the technical and performance requirements of valves such as a gate valve, a butterfly valve, a stop valve, a flow limiting valve, a check valve, a ball float valve, a pressure reducing valve, a pressure relief valve, an electric valve and the like, and the intelligent control of liquid flow is particularly easy to realize.

Drawings

FIG. 1 is a schematic diagram of the basic structure of a first diaphragm-free shaft sleeve spring Z-type liquid control valve; wherein a) an elevational view of the body, b) a partially enlarged elevational view of the cap and slot, c) a generally enlarged elevational view of the piston and extended end face, d) an oil seal and a partially enlarged elevational view thereof, e) an elevational view of an embodiment of the valve.

FIG. 2 is a schematic diagram of the basic structure of a second diaphragm-free shaft sleeve spring Z-type liquid control valve; wherein a) the body and groove are partially enlarged sectional elevation views, b) the cap is partially enlarged sectional elevation views, c) the piston and extension end face are integrally sectioned elevation views, d) the oil seal and its partially enlarged sectional elevation views, e) a schematic representation of an embodiment of the valve in elevation and section views.

FIG. 3 is a schematic diagram of the basic structure of a third diaphragm-free shaft sleeve spring Z-type liquid control valve; wherein a) the body is in elevation and section, b) the cap is in elevation and section, c) the piston and extension end are in elevation and section, d) the valve embodiment and the oil seal, groove are partially enlarged.

Fig. 4 is a schematic diagram of the basic structure of a fourth diaphragm-free shaft sleeve spring Z-type liquid control valve, and a schematic diagram of a front section of an embodiment of the valve.

FIG. 5 is a schematic diagram of the basic structure of a fifth diaphragm-free shaft sleeve spring Z-type liquid control valve; wherein a) an elevational cross-section of the body, b) an elevational cross-section of the cover and concave groove, partially enlarged, c) an elevational cross-section of the piston and extended end face ensemble and U-shaped piston, d) a V-shaped oil seal and its partially enlarged elevational cross-section, e) an elevational cross-section schematic of the valve embodiment.

FIG. 6 is a schematic diagram of the basic structure of a sixth diaphragm-free shaft sleeve spring Z-type liquid control valve; wherein a) an enlarged partial cross-sectional elevation of the body and the concave groove, b) an enlarged partial cross-sectional elevation of the cover, c) an enlarged cross-sectional elevation of the piston and the extended cross-sectional surface as a whole and the U-shaped piston, d) an oil seal and an enlarged partial cross-sectional elevation thereof, e) a schematic illustration of an embodiment of the valve in an enlarged cross-sectional elevation.

FIG. 7 is a schematic diagram showing the basic structure of a seventh non-diaphragm Z-shaped fluid control valve with a shaft sleeve and a spring; an enlarged partial cross-sectional view of the valve embodiment and the concave groove.

FIG. 8 is a schematic diagram showing the basic structure of an eighth Z-shaped fluid control valve without a diaphragm, a shaft sleeve and a spring; valve embodiment and sealing washer inflation mouth part enlarge cross-section schematic diagram.

FIG. 9 is a schematic view of a seal ring groove processing structure and a seal ring assembling structure of a ninth non-diaphragm shaft sleeve spring Z-type liquid control valve; wherein a) the body is in front section, b) the cover is in front section, c) the piston and extended broken end surface is integrated and the U-shaped piston is in front section, d) the oil seal and a part of enlarged front section, e) the front section of the valve embodiment and the enlarged part of the concave groove are schematically shown.

FIG. 10 is a schematic view showing a seal ring groove processing structure and a seal ring assembling structure of a tenth Z-shaped fluid control valve without a diaphragm shaft sleeve spring; wherein a) a sectional front view of the body, b) a sectional front view of the cap, c) a sectional front view of the piston and the entire extended cross-sectional end face and the U-shaped piston, d) an oil seal and a partially enlarged sectional front view thereof, e) a partially enlarged sectional front view of an embodiment of the valve and the concave groove.

FIG. 11 is a groove machining structure and a packing assembly structure of a packing of an eleventh Z-shaped fluid control valve without a diaphragm shaft sleeve spring; wherein a) the body is in front section, b) the cover is in front section, c) the piston and extended broken end surface is integrated and the U-shaped piston is in front section, d) the oil seal and a part of enlarged front section, e) the front section of the valve embodiment and the enlarged part of the concave groove are schematically shown.

FIG. 12 is a schematic view of a seal ring groove processing structure and a seal ring assembling structure of a twelfth Z-shaped fluid control valve without a diaphragm shaft sleeve spring; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended cross-section integrated and U-shaped piston, d) an elevational cross-section of the seat, e) an oil seal and a partially enlarged elevational cross-section thereof, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

FIG. 13 is a schematic view showing a groove processing structure and a packing assembling structure of a packing of a thirteenth Z-type fluid control valve without a diaphragm, a shaft sleeve, and a spring; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended broken end face ensemble and U-shaped piston, d) an elevational cross-section of the seat, e) an oil seal and its partially enlarged elevational cross-section, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

FIG. 14 is a schematic view of a seal ring groove machining structure and a seal ring assembling structure of a fourteenth diaphragm-less shaft sleeve spring Z-type liquid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended cross-section integrated and U-shaped piston, d) an elevational cross-section of the seat, e) an oil seal and a partially enlarged elevational cross-section thereof, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

FIG. 15 is a schematic view of a seal ring groove machining structure and a seal ring assembling structure of a fifteenth diaphragm-free shaft sleeve spring Z-type liquid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended broken end face ensemble and U-shaped piston, d) an elevational cross-section of the seat, e) an oil seal and its partially enlarged elevational cross-section, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

FIG. 16 is a schematic view of a seal ring groove processing structure and a seal ring assembling structure of a sixteenth Z-shaped fluid control valve without a diaphragm, a shaft sleeve and a spring; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended cross-section integrated and U-shaped piston, d) an elevational cross-section of the seat, e) an oil seal and a partially enlarged elevational cross-section thereof, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

FIG. 17 is a schematic view of a seal ring groove machining structure and a seal ring assembling structure of a seventeenth diaphragm-free shaft sleeve spring Z-type liquid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended broken end face ensemble and U-shaped piston, d) an elevational cross-section of the seat, e) an oil seal and its partially enlarged elevational cross-section, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

Fig. 18 is a seal ring groove processing structure and a seal ring assembling structure of an eighteenth Z-shaped fluid control valve without a diaphragm shaft sleeve spring; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended broken end face ensemble and U-shaped piston, d) an elevational cross-section of the seat, e) an oil seal and its partially enlarged elevational cross-section, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

FIG. 19 is a schematic diagram of a basic structure of a diaphragm-free shaft sleeve spring Z-type liquid control valve with a double-stop valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended broken end face ensemble and U-shaped piston, d) an oil seal and its partial enlarged elevational cross-section, e) an elevational cross-section of the valve embodiment and a partial enlarged view of the concave groove, oil seal, upper stop.

FIG. 20 is a schematic view of a double-stop valve in basic configuration for a diaphragm-free shaft sleeve spring Z-type fluid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended cross-section integrated with the U-shaped piston, d) an oil seal and enlarged partial cross-section thereof, e) an elevational cross-section of the valve embodiment and an enlarged partial view of the concave groove, oil seal, upper stop.

FIG. 21 is a schematic diagram of a double-stop valve of another basic structure of a diaphragm-free shaft sleeve spring Z-type liquid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended broken end face ensemble and U-shaped piston, d) an elevational cross-section of the seat, e) an oil seal and its partial enlarged elevational cross-section, f) an elevational cross-section of the valve embodiment and a partial enlarged view of the concave groove, oil seal, upper stop.

FIG. 22 is a schematic view of a dual-stop valve of another basic construction of a diaphragm-free shaft sleeve spring Z-type liquid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended broken end face ensemble and U-shaped piston, d) an elevational cross-section of the seat, e) an oil seal and its partial enlarged elevational cross-section, f) an elevational cross-section of the valve embodiment and a partial enlarged view of the concave groove, oil seal, upper stop.

Fig. 23 is a schematic diagram of a restrictor valve configuration for a diaphragm-free shaft sleeve spring Z-type liquid control valve basic configuration.

FIG. 24 is a schematic diagram of an alternative diaphragm-free shaft sleeve spring Z-type liquid control valve basic configuration constrictor valve configuration.

Fig. 25 is a schematic diagram of an electric valve structure of a basic structure of a diaphragm-free shaft sleeve spring Z-type liquid control valve.

Fig. 26 is a schematic diagram of an alternative Z-type diaphragm-less spindle sleeve spring basic construction for a liquid control valve.

FIG. 27 is a schematic diagram of a one-way single shut-off valve for a diaphragm-free, shaft-sleeve, spring Z-type fluid control valve.

Fig. 28 is a schematic diagram of a one-way dual shut-off valve for a diaphragm-free shaft sleeve spring Z-type liquid control valve.

FIG. 29 is a schematic view of a non-diaphragm, spring-in-bushing Z-type fluid control valve, check valve and shut-off valve.

FIG. 30 is a schematic diagram of a two-way single shut-off valve for a diaphragm-free shaft sleeve spring Z-type fluid control valve.

FIG. 31 is a schematic diagram of a two-way dual shut-off valve for a diaphragm-free shaft sleeve spring Z-type fluid control valve.

FIG. 32 is a schematic diagram of a diaphragm-free shaft sleeve spring Z-type liquid control valve float valve.

FIG. 33 is a schematic diagram of a diaphragm-free shaft sleeve spring Z-type fluid control valve restrictor and check valve.

FIG. 34 is a schematic diagram of a pressure reducing and stabilizing valve of a diaphragm-free shaft sleeve spring Z-shaped liquid control valve.

FIG. 35 is a schematic diagram of a diaphragm-free shaft sleeve spring Z-type fluid control valve relief valve.

Description of the drawings:

a cover 1, a seat 2, a body 3, a sealing ring groove 4, a sealing ring 5, a piston 6, a piston inner cavity 7, a body outlet end inner cavity 8, a sealing ring outer ring 9, a sealing ring inner ring 10, a piston outer ring 11, a body inlet end inner cavity 12, a piston lower extending end surface 13, a body outlet end inner cavity spigot 14, a pipeline I15, a valve I16, a three-way valve 17, a check valve 18, an inlet two-way valve I19, an outlet two-way valve II 20, a three-way valve I21, a three-way valve II 22, a floating ball valve 23, a body outlet end inner cavity flange 24, a pipeline II 25, a liquid pool 26, a hand wheel three-way pilot valve 27, a liquid inlet end 28, a hand wheel 29, a two-way pilot valve 30, a screw rod 31, a three-way pilot valve 32, a two-way valve III 33, a semi-closing check valve 34, a pump 35, a two-way valve IV 36, a two-way valve 37, a sealing surface I38, a screw 39, a cut-off port 40, an upper outward extending part 41, a lower end surface 42, an electric valve 43, a lower end surface 44, a rotary hand wheel 45, a T-shaped sealing ring seat 46, a T-shaped sealing ring seat 47, a V-shaped sealing ring 48, a concave sealing ring 50, a piston inner diameter expansion port 49 and an expansion port 51, sealing strip 52, sealing surface II 53, sealing surface III 54, screw 55, U-shaped 56 and valve II 57.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

Example 1

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the Z-shaped liquid control valve of the diaphragm-free shaft sleeve spring comprises a cover 1, a body 3, a sealing ring groove 4, a sealing ring 5, a piston 6, an end surface 13 extending below the piston and a cavity spigot 14 at the outlet end of the body. The sealing ring groove 4 is arranged on the cover 1, the body 3 and the

covers

1 and 3, the sealing ring 5 is arranged in the sealing ring groove 4, the piston 6 is arranged in the sealing ring 5, a whole body is arranged between the piston 6 and the piston lower extending end surface 13, the

covers

1 and 3 are sealed into a whole body, the piston inner cavity 7 and the body outlet end inner cavity 8 are sealed, the sealing ring outer ring 9 and the sealing ring groove 4 are sealed, the sealing ring inner ring 10 and the piston outer ring 11 are sealed and slidably sealed, the body inlet end inner cavity 12 and the body outlet end inner cavity 8 are sealed, the piston lower extending end surface 13 is matched and sealed with the body outlet end inner cavity spigot 14 after the piston 6 moves, and the piston inner cavity 7, the body inlet end inner cavity 12 and the body outlet end inner cavity 8 are connected through a pipeline, a valve or a valve.

Example 2

In the Z-shaped liquid control valve without the diaphragm shaft sleeve spring, as shown in fig. 5, 6, 7 and 8, the plane of the sealing ring groove 4 is circular, the structural shape of the cross section is concave 49, the plane of the sealing ring 5 is circular, the cross section is V-shaped 50, the plane of the piston 6 is circular, the cross section is U-shaped 56, the plane of the outlet end inner cavity spigot 14 is circular, the inner diameter of the outlet end inner cavity spigot 14 is smaller than the outer diameter of the piston 6, the ring plane of the sealing ring groove 4 is parallel to the ring plane of the body outlet end inner cavity spigot 14 in interval and has the same center line position, the center line position of the ring plane of the sealing ring groove 4 is the same as and vertical to the center line position of the piston 6 arranged in the sealing ring 5, the piston 6 is arranged in the sealing ring 5, the outer ring 11 of the piston needs to be in contact with the inner ring 10 of the sealing ring, the piston inner diameter opening 51 of the piston (6) arranged in the sealing ring 5 faces towards the piston inner cavity 7 or the opposite direction of the piston inner cavity 7, the piston 6 and the piston lower extension end face 13 are vertically connected and fixed into a whole, the lower extension end face 13 is provided with a sealing face I38, the sealing ring outer ring 9 and the sealing ring groove 4 are sealed, the sealing ring outer ring 9 is elastically kept to be in contact with the sealing ring groove 4 for sealing, the sealing ring inner ring 10 and the piston outer ring 11 are sealed and slidably sealed, the sealing ring inner ring 10 is elastically kept to be in contact with and slidably contacted with the piston outer ring 11 for sealing, the sealing ring outer ring 9 and the sealing ring inner ring 10 are elastically kept, the sealing ring 4 expands and expands along with the increase and decrease of hydraulic pressure once the sealing ring expansion opening 48 is pressed by hydraulic pressure in the direction, and the sealing ring 4 cannot expand and expand along with the increase of hydraulic pressure if the sealing ring expansion opening 48 is pressed by hydraulic pressure in the opposite direction, the expansion and the expansion are reduced, the sealing ring 5 is arranged in the sealing ring groove 4, the direction of a sealing ring expansion opening 48 faces towards the piston inner cavity 7 or the direction opposite to the piston inner cavity 7, the cover 1 and the body 3 are connected and fixed into a whole in a sealing way, and the piston inner cavity 7 is connected with the body inlet end inner cavity 12 and the body outlet end inner cavity 8 through pipelines, valves and pilot valves.

The specific description is as follows: the structure of the Z-shaped liquid control valve without the diaphragm, the shaft lever, the shaft sleeve and the spring can ensure that the Z-shaped liquid control valve without the diaphragm, the shaft lever, the shaft sleeve and the spring are not required to be installed; the liquid can bidirectionally pass through the Z-shaped liquid control valve without the diaphragm shaft sleeve spring; the Z-shaped liquid control valve without the diaphragm, the shaft sleeve and the spring can close liquid in two directions.

The working principle is shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7 and fig. 8.

1. The piston inner cavity 7, the body inlet end inner cavity 12 and the body outlet end inner cavity 8 are connected through a pipeline I15, a valve I16 and a valve II 57, when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the valve I16 on the side of the body inlet end inner cavity 12 is closed, the valve II 57 on the side of the body outlet end inner cavity 8 is opened, the liquid in the body inlet end inner cavity 12 cannot enter the piston inner cavity 7, the extending end surface 13 below the piston leaves the body outlet end inner cavity spigot 14 under the pushing of the liquid in the body inlet end inner cavity 12, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the body outlet end inner cavity spigot 14, and the liquid pressure in the piston inner cavity 7 and the body outlet end inner cavity 8 is the same because the piston inner cavity 7 is communicated with the body outlet end inner cavity 8, the liquid in the inner cavity 12 of the body inlet end can enter the inner cavity 8 of the body outlet end through the spigot 14 of the inner cavity of the body outlet end only depending on the whole weight of the piston 6 vertically and fixedly connected with the extension end surface 13 below the piston and the resistance caused by the friction of the inner ring 10 of the sealing ring with elastic maintenance and contact sealing with the outer ring 11 of the piston, because the inner ring 10 of the sealing ring has the elastic maintenance and contact sealing with the outer ring 11 of the piston and has the minimum elasticity when the sealing ring 5 is not pressed by the liquid, the resistance caused by the friction is also small, the liquid in the inner cavity 12 of the body inlet end can flow into the inner cavity 8 of the body outlet end as long as the liquid can overcome the pressure loss of the resistance caused by the friction of the elastic maintenance and contact sealing with the outer ring 11 of the piston and the sliding contact sealing with the inner ring 10 of the inner ring of the sealing ring, therefore, the pressure loss of the liquid flowing through the spigot 14 of the inner cavity of the body outlet end into the inner cavity 8 of the body outlet end is very small, the starting pressure of the Z-shaped liquid control valve without the diaphragm shaft sleeve spring is extremely low, so that the application working condition range of the Z-shaped liquid control valve without the diaphragm shaft sleeve spring is large.

2. The piston inner cavity 7, the body inlet end inner cavity 12 and the body outlet end inner cavity 8 are connected through a pipeline I15, a valve I16 and a valve II 57, when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the valve I16 on the side of the body inlet end inner cavity 12 is opened, the valve II 57 on the side of the body outlet end inner cavity 8 is closed, the liquid in the body inlet end inner cavity 12 enters the piston inner cavity 7, the piston inner cavity 7 is not communicated with the body outlet end inner cavity 8, the liquid pressure in the piston inner cavity 7 and the valve body inlet end inner cavity 12 is the same, the liquid pressure in the body outlet end inner cavity 8 is that the liquid pressure in the body inlet end inner cavity 12 overcomes the resistance caused by the fact that the liquid pressure in the piston 6 is vertically and fixedly connected with the extending end surface 13 below the piston and the inner ring 10 has elastic force to keep the sliding contact sealing with the piston outer ring 11 and then can enter the body outlet end inner cavity 8, therefore, a very small pressure difference exists between the liquid pressure in the inner cavity 12 of the body inlet end and the liquid pressure in the inner cavity 8 of the body outlet end, the elasticity of the sealing ring inner ring 10 which elastically keeps the contact and sealing with the piston outer ring 11 is very small, the friction of the sliding contact and sealing of the piston outer ring 11 is also small, the oil seal outer ring 11 and the oil seal inner ring 10 are elastically kept, so the liquid cannot leak into the inner cavity 8 of the body outlet end, the distance between the piston lower extension end surface 13 and the body outlet end inner cavity spigot 14 is gradually close when the piston 6 moves downwards, the liquid pressure difference between the inner cavity 12 of the body inlet end and the inner cavity 8 of the body outlet end is gradually increased, and the direction of the sealing ring expansion port 48 is expanded along with the increase of the liquid pressure by the liquid sealing ring 5 in the process of the gradual increase of the liquid pressure, at the moment, the sealing ring 5 tends to be in an expansion state in the sealing ring groove 4, and a circle of annular force is formed between the sealing ring groove 4 and the sealing ring 5 after the sealing ring 5 expands to enable the piston 6 to tend to be vertical to the plane circle of the sealing ring groove 4, so that the extending end surface 13 below the piston and the spigot 14 of the inner cavity of the body outlet end are kept in parallel at a distance; the piston 6 continues to move downwards, and the friction resistance between the sliding contact seal of the inner ring 10 of the sealing ring and the outer ring 11 of the piston is increased due to the expansion of the sealing ring 5, so that the piston 6 cannot shake when the distance between the piston lower extension end face 13 and the body outlet end inner cavity spigot 14 is close after the piston 6 moves downwards, and the valve is sealed in a vibration-free fit manner when the piston lower extension end face 13 is parallel to the body outlet end inner cavity spigot 14, therefore, the Z-shaped liquid control valve without the diaphragm shaft sleeve spring is free from resetting by using a spring and increasing the stability when the valve is closed, and the parallel fit seal between the lower extension end face 13 and the valve body outlet end inner cavity spigot 14 is guaranteed by using the diaphragm shaft sleeve.

3. The piston inner cavity 7, the body inlet end inner cavity 12 and the body outlet end inner cavity 8 are connected through a pipeline I15, a valve I16 and a valve II 57, when liquid flows to the body inlet end inner cavity 12 from the body outlet end inner cavity 8, the valve I16 on the side of the body inlet end inner cavity 12 is opened, the valve II 57 on the side of the body outlet end inner cavity 8 is closed, the liquid in the body outlet end inner cavity 8 cannot enter the piston inner cavity 7, the liquid in the piston inner cavity 7 can flow into the valve body inlet end inner cavity 12 through the pipeline I15 and the valve I16 on the side of the inlet end inner cavity 12, the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body inlet end inner cavity 12, and as the area of an outer ring of the piston 6 is larger than the area of an inner ring of the body outlet end inner cavity spigot 14, as long as the liquid pressure in the body outlet end inner cavity 8 is larger than the liquid pressure in the inlet end inner cavity 12, the whole weight of the piston 6 vertically and the vertically fixedly connected with the extension end face 13 below the piston and the sealing ring 10 have the resistance brought by the sliding contact with the piston inner ring 11, the outer ring, the piston inner cavity 11, the piston 6 can move upwards through the piston outlet end inner cavity 14, and the piston inner cavity 14, the piston 8 moves to move to pass through the piston inner cavity 14; in the opening process of the valve, the liquid pressure in the inner cavity 8 of the body outlet end and the liquid pressure difference in the inner cavity 12 of the body inlet end are closer and closer, the sealing ring 4 is pressed by liquid to expand and contract along with the reduction of the pressure of the liquid, when the piston 6 moves to the whole weight of the piston 6 vertically and fixedly connected with the extending end surface 13 below the piston and the resistance caused by the friction between the elastic keeping and the sliding contact sealing of the inner ring 10 of the sealing ring and the outer ring 11 of the piston, the piston 6 does not move upwards any more, so that the opening degree of the valve is the same as long as the conveying pressure of the liquid in two flow directions is the same as the resistance caused by the friction between the elastic keeping and the sliding contact sealing of the inner ring 10 of the piston outer ring 11, the valve can realize the flow from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, and the pressure loss of the liquid from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end is small, so that the Z-shaped liquid control valve without the diaphragm shaft rod shaft sleeve can realize the bidirectional flow under the condition of small pressure loss.

4. The piston inner cavity 7, the body inlet end inner cavity 12 and the body outlet end inner cavity 8 are connected through a pipeline I15, a valve I16 and a valve II 57, when liquid flows to the body inlet end inner cavity 12 from the body outlet end inner cavity 8, the valve I16 on the side of the body inlet end inner cavity 12 is closed, the valve II 57 on the side of the body outlet end inner cavity 8 is opened, the liquid in the body outlet end inner cavity 8 enters the piston inner cavity 7, the liquid in the piston inner cavity 7 cannot flow into the valve body inlet end inner cavity 12 through the pipeline I15 and the valve I16 on the side of the inlet end inner cavity 12, and the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body outlet end inner cavity 8 at the moment, as long as the piston 6 and the lower extension end face 13 of the piston are vertically and fixedly connected, the whole weight can overcome the resistance caused by the fact that the inner ring 10 of the sealing ring has elasticity to keep the sliding contact seal with the outer ring 11 of the piston, the piston 6 can move downwards, the lower extension end face 13 of the piston is matched with the body outlet end inner cavity spigot 14 to seal and cut off the liquid flow in the body inlet end inner cavity 12 of the valve body outlet end inner cavity 8 after the piston 6 moves downwards, the valve is closed, and the two-way closing of the diaphragm-free shaft rod shaft sleeve spring Z-shaped liquid control valve is realized.

Example 3

In the Z-shaped liquid control valve of the diaphragm-free shaft sleeve spring, the sealing ring groove 4 is processed on the cover 1, the body 3 and the

covers

1 and 3, the processing mode is one of three, the number of the sealing ring grooves 4 is 1 or more than 1, the number of the installed sealing rings 5 is the same as that of the processed sealing ring grooves 4, the models of the installed sealing rings are matched, the covers 1 and the body 3 are fixedly connected into a whole by screws 39, and the sealing is sealed by the sealing strip 52, as shown in fig. 9, 10 and 11.

Example 4

In the Z-shaped liquid control valve of the diaphragm-free shaft sleeve spring, the seat 2 is additionally arranged between the cover 1 and the body 3, the sealing ring grooves 4 are processed on the seat 2, the cover 1 and the seat 2, the seat 2 and the body 3, the cover 1, the seat 2 and the body 3, the processing mode is selected from one of five, the number of the processing sealing ring grooves 4 is 1 or more than 1, the number of the installed sealing rings 5 is the same as that of the processed sealing ring grooves 4, the types of the installed sealing rings are matched, the cover 1, the seat 2 and the body 3 are fixedly connected into a whole by screws 39 in a sealing way, and the sealing is sealed by the sealing strips 52, as shown in figures 12, 13, 14, 15 and 16.

Example 5

In the above-mentioned no diaphragm shaft sleeve spring Z type liquid control valve, sealing washer groove 4 is processed on I type sealing washer groove seat 46, and the quantity of processing sealing washer groove 4 is 1 or more than 1, and the quantity of the sealing washer 5 of installation wants with the sealing washer groove 4 quantity of processing, the model matches, sealing connection adopts screw 55 fixed connection to become a whole between I type sealing washer groove seat 46 and the body 3, and sealed adopting sealing strip 52 to seal, sealing connection adopts screw 39 fixed connection to become a whole between lid 1, the body 3, and sealed adopting sealing strip 52 to seal, as shown in FIG. 17.

Example 6

In the above-mentioned no diaphragm shaft sleeve spring Z type liquid control valve, increase II type sealing washer groove seat 47 between lid 1, the body 3, sealing washer groove 4 processing is on II type sealing washer groove seat 47, and the processing quantity is 1 or more than 1, and the quantity of the 5 quantity of the sealing washers of installation and the quantity of the sealing washer groove 4 of processing want the same, the model matches, sealed connection adopts screw 39 fixed connection to become a whole between lid 1, II type sealing washer groove seat 47, the body 3, and sealed sealing strip 52 that adopts, as shown in fig. 18.

Example 7

In the above diaphragm-free shaft sleeve spring Z-type liquid control valve, 1 cut-off port 40 is arranged above or below the sealing ring groove 4, the ring plane of the cut-off port 40 is parallel to the ring plane of the sealing ring groove 5, the center line position is the same, the upward outward extension part 41 of the piston 6 or the lower end face 42 of the piston 6 is matched and sealed with the cut-off port 40 after the piston 6 moves downwards, meanwhile, the downward extension end face 13 of the piston is matched and sealed with the body outlet end inner cavity stop 14, the upward outward extension part 41 of the piston 6 is provided with a sealing face ii 53, the lower end face 42 of the piston 6 is provided with a sealing face iii 54, the cover 1 and the body 3 are fixedly connected into a whole by a screw 39 in a sealing way, and the sealing is sealed by a sealing strip 52, as shown in fig. 19 and fig. 20.

Example 8

In the above-mentioned diaphragm-free shaft sleeve spring Z-type liquid control valve, the seat 2 is added between the cover 1 and the body 3, the seat 2 is provided with a cut-off port 40, the ring plane of the cut-off port 40 is parallel to the ring plane of the sealing ring groove 5, and the center line position is the same, the upward outward extending part 41 of the piston 6 or the lower end face 42 of the piston 6 fits and seals with the cut-off port 40 after the piston 6 moves downward, and simultaneously the downward extending end face 13 of the piston fits and seals with the body outlet end cavity cut-off port 14, the upward outward extending part 41 of the piston 6 is provided with a sealing face ii 53, the lower end face 42 of the piston 6 is provided with a sealing face iii 54, the cover 1, the seat 2 and the body 3 are fixedly connected into a whole by screws 39, and the sealing is sealed by a sealing strip 52, as shown in fig. 21 and fig. 22.

Example 9

In the diaphragm-free shaft sleeve spring Z-shaped liquid control valve, a shaft rod 44 is arranged on the cover 1 and extends into the piston inner cavity 7, the contact part between the shaft rod 44 and the cover 1 is sealed, and the shaft rod 44 can move up and down by rotating a hand wheel 45. As shown in fig. 23 and 24.

Further details of example 1, example 2, example 3, example 4, example 5, example 6, example 7, example 8 and example 9 are as follows:

detailed description 1

In the Z-shaped liquid control valve of the diaphragm-free shaft rod shaft sleeve spring, when the sealing ring 5 is installed, the sealing ring 5 needs to be installed according to the flowing direction requirement of liquid, under the working condition, the liquid only needs to flow from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, the direction of the expansion port 48 of the sealing ring is installed towards the inner cavity 7 of the piston, under the working condition, the liquid only needs to flow from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, and the direction of the expansion port 48 of the sealing ring is installed towards the opposite direction of the inner cavity 7 of the piston; the working condition requires that the liquid flows in two directions, and when the sealing ring 5 is installed, the sealing ring 5 facing the piston inner cavity 7 needs to be provided with sealing ring expansion openings 48 in two directions; the working condition only requires that the Z-shaped liquid control valve without the diaphragm shaft sleeve spring is opened and closed in one way, the number of the mounting seal rings 5 is 1 or more than 1, if the two directions are required to be opened and closed, the number of the mounting seal rings 5 is 2 to more than 2; through different processing structures of the sealing ring grooves 4 and assembling forms of the sealing rings 5, the requirements of various working conditions on the diaphragm-free shaft sleeve spring Z-shaped liquid control valve can be met.

Specific description 2:

when the piston 6 and the piston lower extension end surface 13 are vertically connected and fixed into a whole, the direction of the piston inner diameter opening 51 of the piston 6 faces the piston inner cavity 7 or the direction opposite to the piston inner cavity 7 is connected and fixed, so that the requirement of the diaphragm-free shaft rod shaft sleeve spring Z-shaped liquid control valve on the working condition can be met.

Description of the details 3:

in the Z-shaped liquid control valve without the diaphragm shaft sleeve spring, the oil seal seat and the piston of the valve can be replaced in a set by adopting the structural forms shown in figures 17 and 18, and other parts of the Z-shaped liquid control valve without the diaphragm shaft sleeve spring do not need to be replaced after the piston and the oil seal seat are damaged. Due to the unique manufacturing and assembling method, the Z-shaped liquid control valve is extremely convenient to maintain and does not need to be replaced by professional technicians, so that the service life of the Z-shaped liquid control valve without the diaphragm shaft sleeve and the spring shaft sleeve can be basically the same as that of a pipeline.

Detailed description 4:

in the above-mentioned no diaphragm axle sleeve spring Z type liquid control valve, adopt the structural style of fig. 19, fig. 20, fig. 21, fig. 22 to make the sealing of valve reach better sealed effect.

The working principle is as follows:

1. as shown in fig. 19 and 21, the liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the outward extending part 41 of the upper end surface of the piston fits and seals with the stop port 40 after the piston 6 moves downward, and simultaneously the downward extending end surface 13 of the piston fits and seals with the body outlet end inner cavity stop port 14 to cut off the liquid flowing from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, and the valve is closed; a cut-off opening 40 is processed above a sealing ring groove 4, when the lower end face 42 of the piston is matched and sealed with the cut-off opening 40 after the piston 6 moves downwards, liquid in the piston inner cavity 7 is sealed at the position, and the cut-off opening is sealed, so that the abrasion of the seal of the cut-off opening is extremely small, the seal is better along with the increase of the using time, and the liquid which does not leak can not permeate into the inner cavity 8 of the body outlet end, and the valve is completely sealed without permeation.

2. As shown in fig. 20 and 22, in the lower double-stop valve of the Z-shaped liquid control valve without the diaphragm shaft sleeve spring, liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the lower end surface 42 of the piston is matched and sealed with the stop port 40 after the piston 6 moves downwards, meanwhile, the lower extension end surface 13 of the piston is matched and sealed with the body outlet end inner cavity stop port 14 to cut off the liquid flowing from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, and the valve is closed; a cut-off port 40 is processed below a sealing ring groove 4, when the lower end face 42 of the piston is matched and sealed with the cut-off port 40 after the piston 6 moves downwards, liquid in the inner cavity 7 of the piston is sealed at the position, and the cut-off port is sealed, so that the abrasion of the seal of the cut-off port is extremely small, the seal is better along with the increase of the using time, and liquid which does not leak permeates into the inner cavity 8 of the outlet end of the body, and the valve is completely sealed without permeation.

Description of the details 5:

if the flow rate is to be statically adjusted, the structural form of fig. 23 and 24 is preferably adopted.

The working principle is as follows:

in the diaphragm-free shaft sleeve spring Z-shaped liquid control valve flow limiting valve shown in figures 23 and 24, the piston 6 has two installation forms, and the piston inner diameter opening 51 of the piston 6 placed in the sealing ring 5 faces towards the piston inner cavity 7 or the direction opposite to the piston inner cavity 7; the shaft lever 44 can move up and down by rotating the hand wheel 45, the shaft lever 44 is moved to a set position, and the piston 6 can be propped by the shaft lever 44 after rising and can not rise any more, so that the lower extension end surface 13 of the piston and the body outlet end inner cavity spigot 14 can be kept at a set fixed opening, the flow between the lower extension end surface 13 of the piston and the body outlet end inner cavity spigot 14 is limited, and static flow limitation is realized.

Example 10

In the above-described Z-type liquid control valve without a diaphragm, a shaft sleeve spring is mounted on the valve, and the valve is opened and closed by the mounted electric actuator 43, as shown in fig. 25 and 26.

The specific description is as follows:

the electric actuator 43 is used for opening and closing the valve, and the electric actuator 43 is used for replacing manual operation to open and close the valve, so that the control of the Z-shaped liquid control valve of the diaphragm-free shaft rod shaft sleeve spring can be realized remotely: once the power is off, the actuator 43 can be removed and the valve opened and closed with conventional tools.

Example 11

In the above-mentioned non-diaphragm shaft sleeve spring Z-type liquid control valve single-way shutoff valve, the piston cavity 7 is connected to the three-way valve 17 through the pipe i 15, one outlet of the three-way valve 17 is connected to the valve body inlet cavity 12 through the pipe i 15, and the other outlet is connected to the valve body outlet cavity 8 through the pipe i 15, as shown in fig. 27.

The specific description is as follows: this embodiment can be used to assemble pipes and valves using any one of the basic structures and the machining form of the seal groove and the seal assembling structure of the present invention, as shown in fig. 27.

The working principle is as follows:

1. when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the switch position of the three-way ball valve 17 is arranged between the piston inner cavity 7 and the body inlet end inner cavity 12 to be closed, the piston inner cavity 7 and the body outlet end inner cavity 8 are opened, the liquid in the body inlet end inner cavity 12 cannot enter the piston inner cavity 7 through the pipeline I15 and the three-way ball valve 17, meanwhile, the liquid in the piston inner cavity 7 can enter the body outlet end inner cavity 8 through the three-way ball valve 17 and the pipeline I15, at the moment, the piston 6 cannot be pressed, the extending end face 13 below the piston leaves the body outlet end inner cavity spigot 14 under the pushing of the liquid in the body inlet end inner cavity 12, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the body outlet end inner cavity spigot 14, and the valve is opened; the switch position of a three-way ball valve 17 is arranged in a piston inner cavity 7 and a body inlet end inner cavity 12 to be opened, the piston inner cavity 7 and a body outlet end inner cavity 8 are closed, liquid in the body inlet end inner cavity 12 enters the piston inner cavity 7 through a pipeline I15 and the three-way ball valve 17, meanwhile, the liquid in the piston inner cavity 7 cannot enter the body outlet end inner cavity 8 through the three-way ball valve 17 and a pipeline I15, the piston 6 moves downwards under pressure because the area of an outer ring of the piston 6 is larger than that of an inner ring of a body outlet end inner cavity spigot 14, an extending end face 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flowing from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, and the valve is closed.

2. When liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, the switch position of the three-way ball valve 17 is arranged between the piston inner cavity 7 and the body inlet end inner cavity 12 and the piston inner cavity 7 and the body outlet end inner cavity 8 are opened, the liquid in the valve body outlet end inner cavity 8 enters the piston inner cavity 7 through the pipeline I15 and the three-way ball valve 17, meanwhile, the liquid in the piston inner cavity 7 cannot enter the valve body inlet end inner cavity 12 through the three-way ball valve 17 and the pipeline I15, when the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body outlet end inner cavity 8, the piston 6 moves downwards under the action of self weight, the extending end surface 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flowing from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, and the valve is closed; the switch position of a three-way ball valve 17 is arranged in a piston inner cavity 7 and a body inlet end inner cavity 12 to be opened, the piston inner cavity 7 and a body outlet end inner cavity 8 are closed, liquid in the body outlet end inner cavity 8 cannot enter the piston inner cavity 7 through a pipeline I15 and the three-way ball valve 17, meanwhile, the liquid in the piston inner cavity 7 enters the body inlet end inner cavity 12 through the three-way ball valve 17 and a pipeline I15, the piston 6 is pushed by the liquid in the body outlet end inner cavity 8 to move upwards due to the fact that the area of an outer ring of the piston 6 is larger than that of an inner ring of the body outlet end inner cavity spigot 14, an extending end face 13 below the piston leaves the body outlet end inner cavity spigot 14 when the piston 6 moves upwards, the liquid in the body outlet end inner cavity 8 flows into the body inlet end inner cavity 12 through the body outlet end inner cavity spigot 14, and the valve is opened.

3. The specific description is as follows: when liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, or when liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, after the three-way ball valve 17 is operated, the liquid can only flow in one direction, and cannot flow in the other direction, so that the liquid flow control valve only has the functions of one-way flow and one-way flow closure.

Example 12

In the above-mentioned non-diaphragm shaft sleeve spring Z-shaped liquid control valve one-way double throttle valve, the piston cavity 7 is connected to the three-way valve 17 through the pipe i 15, one outlet of the three-way valve 17 is connected to the valve body inlet cavity 12 through the pipe i 15 and the check valve 18, and the other outlet is connected to the valve body outlet cavity 8 through the pipe i 15, as shown in fig. 28.

The specific description is as follows: this embodiment can employ any of the configurations of the present invention to assemble pipes and valves in accordance with the principles of the present invention as shown in fig. 28.

1. When liquid flows from the internal cavity 12 of the body inlet end to the internal cavity 8 of the body outlet end, the switch position of the three-way ball valve 17 is arranged between the internal cavity 7 of the piston and the internal cavity 12 of the body inlet end to be closed, the internal cavity 7 of the piston and the internal cavity 8 of the body outlet end are opened, the liquid in the internal cavity 12 of the body inlet end cannot enter the internal cavity 7 of the piston through the pipeline I15, the check valve 18 and the three-way ball valve 17, meanwhile, the liquid in the internal cavity 7 of the piston can enter the internal cavity 8 of the body outlet end through the three-way ball valve 17 and the pipeline I15, the piston 6 cannot be pressed at the moment, the extending end surface 13 below the piston leaves the spigot 14 of the internal cavity 12 of the body outlet end under the pushing of the liquid in the internal cavity 12 of the body inlet end, the liquid in the internal cavity 12 of the body inlet end enters the internal cavity 8 of the body outlet end through the spigot 14 of the internal cavity of the body outlet end, and the valve is opened; the switch position of a three-way ball valve 17 is arranged in a piston inner cavity 7 and a body inlet end inner cavity 12 to be opened, the piston inner cavity 7 and a valve body outlet end inner cavity 8 are closed, liquid in the body inlet end inner cavity 12 enters the piston inner cavity 7 through a pipeline I15, a check valve 18 and the three-way ball valve 17, meanwhile, the liquid in the piston inner cavity 7 cannot enter the body outlet end inner cavity 8 through the three-way ball valve 17 and the pipeline I15, the piston 6 moves downwards under pressure because the area of an outer ring of the piston 6 is larger than that of an inner ring of a body outlet end inner cavity spigot 14, an extending end face 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flowing from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, and the valve is closed.

2. When liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, the switch position of the three-way ball valve 17 is arranged between the inner cavity 7 of the piston and the inner cavity 12 of the body inlet end to be closed, the inner cavity 7 of the piston and the inner cavity 8 of the body outlet end are opened, the liquid in the inner cavity 8 of the body outlet end enters the inner cavity 7 of the piston through the pipeline I15 and the three-way ball valve 17, meanwhile, the liquid in the inner cavity 7 of the piston cannot enter the inner cavity 12 of the body inlet end through the three-way ball valve 17, the check valve 18 and the pipeline I15, when the liquid pressure in the inner cavity 7 of the piston is the same as the liquid pressure in the inner cavity 8 of the body outlet end, the piston 6 moves downwards under the action of self weight, the extending end surface 13 below the piston is matched with the spigot 14 of the inner cavity of the body outlet end after the piston 6 moves downwards to seal and cut off the liquid flowing from the inner cavity 8 of the body inlet end, and the valve is closed; the switch position of the three-way ball valve 17 is arranged in the piston inner cavity 7 and the body inlet end inner cavity 12 to be opened, the piston inner cavity 7 and the body outlet end inner cavity 8 are closed, liquid in the body outlet end inner cavity 8 can not enter the piston inner cavity 7 through the pipeline I15 and the three-way ball valve 17, and meanwhile liquid in the piston inner cavity 7 can not enter the body inlet end inner cavity 12 through the three-way ball valve 17, the check valve 18 and the pipeline I15, so that the piston 6 can not be pressed to move, the valve can not be opened, and the purposes of one-way communication and two-way flow stopping are achieved.

Example 13

In the above-mentioned non-diaphragm shaft sleeve spring Z-type liquid control valve check valve and shutoff valve, the piston cavity 7 is connected to the inlet cavity 12 through the pipe i 15 and the inlet two-way valve i 19, and the piston cavity 7 is connected to the outlet cavity 8 through the pipe i 15 and the outlet two-way valve ii 20, as shown in fig. 29.

The specific description is as follows: this embodiment may employ an optional configuration of the present invention to assemble pipes, valves, etc. in keeping with the principles of the present invention, as shown in fig. 29.

The working principle is as follows:

1. when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the inlet end two-way valve I19 is closed, the outlet end two-way valve II 20 is opened, the liquid in the body inlet end inner cavity 12 cannot flow into the piston inner cavity 7, the liquid in the piston inner cavity 7 can flow into the body outlet end inner cavity 8 through the pipeline I15 and the outlet end two-way valve II 20, at the moment, the piston 6 cannot be pressed, the extending end surface 13 below the piston leaves the body outlet end inner cavity spigot 14 under the pushing of the liquid in the valve body inlet end inner cavity 12, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the valve body outlet end inner cavity spigot 14, and the valve is opened; when liquid flows from the body outlet end inner cavity 8 to the valve body inlet end inner cavity 12, the liquid pressure in the piston inner cavity 7 depends on the liquid in the body outlet end inner cavity 8 entering the piston inner cavity 7, when the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body outlet end inner cavity 8, the piston 6 can move downwards under the action of self weight, the extending end surface 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flow of the valve body outlet end inner cavity 8 to the body inlet end inner cavity 12, and the valve is closed, so that the purpose of non-return is achieved.

2. When liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, the outlet end two-way valve II 20 is closed, the inlet end two-way valve I19 is opened, the liquid in the body outlet end inner cavity 8 cannot flow into the piston inner cavity 7, the liquid in the piston inner cavity 7 can flow into the valve body inlet end inner cavity 12 through the pipeline I15 and the inlet end two-way valve I19, the piston 6 is pushed to move upwards by the liquid in the valve body outlet end inner cavity 8 due to the fact that the area of an outer ring of the piston 6 is larger than the area of an inner ring of the body outlet end inner cavity spigot 14, the piston lower extending end face 13 is separated from the body outlet end inner cavity spigot 14 when the piston 6 moves upwards, the liquid in the body outlet end inner cavity 8 flows into the body inlet end inner cavity 12 through the body outlet end inner cavity spigot 14, and the valve is opened; when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the liquid pressure in the piston inner cavity 7 depends on the liquid in the body inlet end inner cavity 12 entering the piston inner cavity 7, when the pressure in the piston inner cavity 7 is the same as the body inlet end inner cavity 12, the piston 6 can move downwards under the action of the liquid pressure because the area of the outer ring of the piston 6 is larger than the area of the inner ring of the body outlet end inner cavity spigot 14, the extending end surface 13 below the piston is matched with the valve body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid in the body inlet end inner cavity 12 from flowing to the body outlet end inner cavity 8, and the valve is closed to achieve the purpose of non-return.

3. The specific description is as follows: when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8 or when liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, the inlet end two-way valve I19 and the outlet end two-way valve II 20 are operated, one two-way valve is opened, the other two-way valve is closed, and one liquid flowing direction is closed, so that the liquid flow stopping and intercepting functions are achieved.

Example 14

In the above-mentioned two-way single-shutoff valve of the Z-shaped liquid control valve without the diaphragm, the piston cavity 7 is connected to the inlet cavity 12 through the pipe i 15, the inlet two-way valve i 19, and the half-closed check valve 34, and the piston cavity 7 is connected to the outlet cavity 8 through the pipe i 15, the outlet two-way valve ii 20, and the half-closed check valve 34, as shown in fig. 30.

The specific description is as follows: this embodiment can employ any of the configurations of the present invention to assemble pipes and valves in accordance with the principles of the present invention as shown in fig. 30.

The working principle is as follows:

1. when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the inlet end two-way valve I19 and the outlet end two-way valve II 20 are opened, the semi-closed check valve 34 installed on the pipeline I15 of the body inlet end inner cavity 12 is closed in a non-return mode by half, the semi-closed check valve 34 installed on the pipeline I15 of the body outlet end inner cavity 8 is fully opened, the liquid in the body inlet end inner cavity 12 enters the piston inner cavity 7 through the pipeline I15, the semi-closed check valve 34, the inlet end two-way valve I19 and the pipeline I15, the semi-closed check valve 34 installed on the pipeline I15 of the body outlet end inner cavity 8 is fully opened, the liquid amount entering the piston inner cavity 7 is smaller than the amount flowing to the body outlet end inner cavity 8, so that the piston 6 cannot be pressed, the extending end surface 13 below the piston leaves the body outlet end inner cavity spigot 14 under the push of the liquid in the body inlet end inner cavity 12, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the body outlet end inner cavity spigot 14, and the valve is opened; opening the inlet two-way valve I19, closing the outlet two-way valve II 20, at this time, half of the check valve 34 installed on the pipeline I15 of the inner cavity 12 of the inlet valve body is closed in a check mode, and all the check valves are not closed, so that liquid in the inner cavity 12 of the inlet valve body can enter the inner cavity 7 of the piston through the half-closed check valve 34, the inlet two-way valve I19 and the pipeline I15, and due to the fact that the outlet two-way valve II 20 is closed, the liquid in the inner cavity 12 of the inlet valve body cannot flow into the inner cavity 8 of the outlet valve body, the area of an outer ring of the piston 6 is larger than that of an inner ring of the spigot 14 of the outlet valve body, the piston 6 moves downwards under pressure, the extension end face 13 below the piston and the spigot 14 of the outlet valve body are matched with the spigot 14 of the outlet end inner cavity to seal and cut off the liquid flowing from the inner cavity 12 of the inlet valve body to the outlet end inner cavity 8, and the valve is closed.

2. When liquid flows to the body inlet end inner cavity 12 from the body outlet end inner cavity 8, the inlet end two-way valve I19 and the outlet end two-way valve II 20 are opened, at the moment, the semi-closed check valve 34 installed on the pipeline I15 of the body outlet end inner cavity 8 is half closed in a non-return mode, the semi-closed check valve 34 installed on the pipeline I15 of the body inlet end inner cavity 12 is fully opened, the liquid in the body outlet end inner cavity 8 enters the piston inner cavity 7 through the pipeline I15, the semi-closed check valve 34, the outlet end two-way valve II 20 and the pipeline I15, because the semi-closed check valve 34 installed on the pipeline I15 of the body inlet end inner cavity 12 is fully opened, the amount of the liquid entering the piston inner cavity 7 is smaller than that flowing to the body inlet end inner cavity 12, because the area of an outer ring of the piston 6 is larger than that of the inner ring of the body outlet end inner cavity spigot 14, the piston 6 is pushed by the liquid of the body outlet end inner cavity 8 to move upwards, the extension end face 13 below the piston leaves the body outlet end inner cavity 14 when the piston 6 moves upwards, the liquid in the body outlet end inner cavity 8 flows to the body inlet end inner cavity 12, and the valve is opened; when the inlet two-way valve I19 is closed and the outlet two-way valve II 20 is opened, the half-closed check valve 34 arranged on the pipeline I15 of the inner cavity 8 of the outlet end of the valve body is half closed but not completely closed, so that liquid in the inner cavity 8 of the outlet end of the valve body can enter the inner cavity 7 of the piston through the pipeline I15, the outlet two-way valve II 20 of the half-closed check valve 34 and the pipeline I15, because the inlet two-way valve I19 is closed, the liquid in the inner cavity 8 of the outlet end of the valve body cannot flow to the inner cavity 12 of the inlet end of the valve body from the inner cavity 7 of the piston, when the liquid pressure in the inner cavity 7 of the piston is the same as the liquid pressure in the inner cavity 8 of the outlet end of the valve body, the piston 6 can move downwards under the action of self weight, the extending end surface 13 below the piston is matched with the spigot 14 of the inner cavity of the outlet end of the body after the piston 6 moves downwards, the liquid in the inner cavity 8 is sealed and cut off, and the liquid in the inner cavity 8 of the outlet end of the valve body flows to the inner cavity 12 of the inlet end of the valve body, and the valve body is closed.

3. The specific description is as follows: when liquid flows to the body outlet end inner cavity 8 from the body inlet end inner cavity 12 or when liquid flows to the body inlet end inner cavity 12 from the body outlet end inner cavity 8, the inlet end two-way valve I19 and the outlet end two-way valve II 20 are opened, the liquid can pass through the valves in two directions, one of the two-way valves is closed, the liquid in one direction can be closed, and therefore the valve has the function that the liquid can pass through the valves in two directions and be intercepted in one direction.

Example 15

In the above-mentioned two-way double shut-off valve for a Z-shaped liquid control valve without a diaphragm, the piston cavity 7 is connected to a tee joint i 21 through a two-way valve iv 36, two outlets of the tee joint i 21 are all provided with a check valve 18, an outlet of the check valve 18 is connected to the inlet cavity 12 through a pipeline i 15 connector, an outlet of the check valve 18 is connected to the outlet cavity 8 through a pipeline i 15 connector, the piston cavity 7 is connected to a tee joint ii 22 through a two-way valve v 37, two outlets of the tee joint ii 22 are both provided with a check valve 18, an outlet of the check valve 18 is connected to the inlet cavity 12 through a pipeline i 15 connector, and an outlet of the check valve 18 is connected to the outlet cavity 8 through a pipeline i 15 connector, as shown in fig. 31.

The specific description is as follows: this embodiment can employ any of the configurations of the present invention to assemble pipes and valves in accordance with the principles of the present invention as shown in fig. 31.

The working principle is as follows:

1. when the liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the two-way valve IV 36 is closed, the two-way valve V37 is opened, and under the state, the two-way valve IV 36 cuts off the liquid of the body inlet end inner cavity 12 and the body outlet end inner cavity 8 connected with the tee joint I21 and enters the piston inner cavity 7; the two-way valve V37 is in an open state, a tee joint II 22 connected with the two-way valve V37 is connected with the body inlet end inner cavity 12 through a check valve 18 and a pipeline I15, but the check valve 18 is used for stopping the body inlet end inner cavity 12, so that liquid in the body inlet end inner cavity 12 cannot enter the piston inner cavity 7; the two-way valve V37 is in an open state, the three-way valve II 22 connected with the two-way valve V37 does not check the liquid in the inner cavity 7 of the slave piston through the check valve 18 and the check valve 18 of the inner cavity 8 of the outlet end of the connector I15 of the pipeline I15, so that the liquid in the inner cavity 7 of the piston can flow into the inner cavity 8 of the body outlet end through the two-way valve V37 and the three-way valve II 22 through the check valve 18 and the pipeline I15, the piston 6 cannot be pressed at the moment, the extending end surface 13 below the piston leaves the spigot 14 of the inner cavity of the body outlet end under the pushing of the liquid in the inner cavity 12 of the body inlet end, the liquid in the inner cavity 12 of the body inlet end enters the inner cavity 8 of the body outlet end through the spigot 14 of the inner cavity of the body outlet end, and the valve is opened.

2. When the liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, the two-way valve IV 36 is closed, the two-way valve V37 is opened, and under the state, the two-way valve IV 36 cuts off the liquid of the body inlet end inner cavity 12 and the body outlet end inner cavity 8 which are connected by the tee joint I21 and enters the piston inner cavity 7; the two-way valve V37 is in an open state, a tee joint II 22 connected with the two-way valve V37 is connected with the outlet end inner cavity 8 through a check valve 18 and a pipeline I15, but the check valve 18 is used for checking the outlet end inner cavity 8, so that liquid in the outlet end inner cavity 8 cannot enter the piston inner cavity 7; the two-way valve V37 is in an open state, the three-way valve II 22 connected with the two-way valve V37 is connected with the check valve 18 of the inlet end inner cavity 12 through the check valve 18 and the pipeline I15 and does not return liquid in the piston inner cavity 7, so that the liquid in the piston inner cavity 7 can flow into the body inlet end inner cavity 12 through the two-way valve V37 and the three-way valve II 22 through the check valve 18 and the pipeline I15, the piston 6 is pushed by the liquid in the body outlet end inner cavity 8 to move upwards due to the fact that the area of an outer ring of the piston 6 is larger than that of an inner ring of the body outlet end inner cavity spigot 14, the piston lower extending end face 13 leaves the body outlet end inner cavity spigot 14 when the piston 6 moves upwards, the liquid in the body outlet end inner cavity 8 flows into the body inlet end inner cavity 12 through the body outlet end inner cavity spigot 14, and the valve is opened.

3. When liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the two-way valve IV 36 is opened, the two-way valve V37 is closed, in this state, the two-way valve V37 cuts off the liquid in the body inlet end inner cavity 12 and the body outlet end inner cavity 8 connected by the three-way valve II 22, and enters the piston inner cavity 7, the two-way valve IV 36 is in an open state, the three-way valve I21 connected with the two-way valve IV 36 passes through the check valve 18 and the pipeline I15 to connect the body outlet end inner cavity 8, but the check valve 18 does not check the liquid in the piston inner cavity 8, so the liquid in the body inlet end inner cavity 12 cannot enter the body outlet end inner cavity 8, the two-way valve IV 36 is in an open state, the area of the ring of the three-way I21 connected with the two-way valve IV 36 passes through the check valve 18 and the pipeline I15 to connect the body inlet end inner cavity 12, but the check valve 18 does not check the liquid in the body inlet end inner cavity 12, therefore the liquid in the body inlet end inner cavity 12 can enter the piston inner cavity 7, the piston 6 is larger than the area of the ring of the inner cavity of the body outlet end inner cavity 14, the piston 6 moves under the pressure, the downward direction, the piston 6 moves, and the piston outlet end inner cavity 13 is closed, and the piston inner cavity 13 is closed.

4. When liquid flows from the body inlet end inner cavity 8 to the body inlet end inner cavity 12, the two-way valve IV 36 is opened, the two-way valve V37 is closed, in this state, the two-way valve V37 cuts off the liquid in the body inlet end inner cavity 12 and the body outlet end inner cavity 8 which are connected by the three-way valve II 22, and the two-way valve IV 36 is in an open state, the three-way valve I21 connected with the two-way valve IV 36 is connected with the body inlet end inner cavity 12 through the check valve 18 and the pipeline I15, but the check valve 18 does not check the liquid in the piston inner cavity 7, so the liquid in the body outlet end inner cavity 8 cannot enter the body inlet end inner cavity 12, the two-way valve IV 36 is in an open state, the three-way valve I21 connected with the two-way valve IV 36 passes through the check valve 18 and the pipeline I15 and the connector outlet end inner cavity 8, but the check valve 18 does not check the liquid in the body outlet end inner cavity 8, so the liquid in the body outlet end inner cavity 8 can enter the piston inner cavity 7, when the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body outlet end inner cavity 8, the piston 6 moves downwards under the self-weight effect, the piston 6 extends, and the end face of the piston 6 is closed, and the end face of the piston outlet end inner cavity 13 is closed.

5. The specific description is as follows: when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8 or when liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, the two-way valve IV 36 is closed, the two-way valve V37 is opened, and the fluid can flow in two directions; the two-way valve IV 36 is opened, the two-way valve V37 is closed, and the valves can be closed in both directions. Therefore, the valve has the functions of enabling liquid to pass through the valve in two directions and stopping the flow in two directions.

Example 16

In the above-mentioned diaphragm-free shaft sleeve spring Z-type liquid control valve float valve, the piston inner chamber 7 is connected to the inlet end inner chamber 12 through the pipe i 15 and the inlet end two-way valve i 19, the piston inner chamber 7 is connected to the float valve 23 through the outlet end two-way valve ii 20 and the pipe i 15, and the body outlet end inner chamber flange 24 is connected to the pipe ii 25 to the liquid pool 26, as shown in fig. 32.

The specific description is as follows: this embodiment can employ any of the configurations of the present invention to assemble pipes and valves in accordance with the principles of the present invention, as shown in fig. 32.

The working principle is as follows:

liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the inlet end two-way valve I19 and the outlet end two-way valve II 20 are opened, the opening degree of the inlet end two-way valve I19 is set to be smaller than that of the outlet end two-way valve II 20, the liquid in the body inlet end inner cavity 12 enters the piston inner cavity 7 through the pipeline I15 and the inlet end two-way valve I19 and then enters the air of the liquid pool 26 through the outlet end two-way valve II 20, the pipeline I15 and the ball float valve 23, at the moment, the piston 6 cannot be pressed, the extending end face 13 below the piston leaves the body outlet end inner cavity spigot 14 under the pushing of the liquid in the body inlet end inner cavity 12, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the body outlet end inner cavity spigot 14, and enters the liquid pool 26 through the pipeline II 25 connected with the body outlet end inner cavity flange 24; when the liquid in the liquid pool 26 rises to the float valve 23, the float valve 23 is closed, the liquid in the body inlet end inner cavity 12 enters the piston inner cavity 7 through the inlet end two-way valve I19 and the pipeline I15, then the liquid cannot enter the air in the liquid pool 26 through the outlet end two-way valve II 20, the pipeline I15 and the float valve 23, the piston 6 moves downwards under pressure because the area of the outer ring of the piston 6 is larger than the area of the inner ring of the body outlet end inner cavity spigot 14, the piston lower extending end surface 13 is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flowing from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, and the valve is closed.

Example 17

The diaphragm-free shaft sleeve spring Z-shaped liquid control valve flow limiting valve and check valve is characterized in that a piston inner cavity 7 is connected with one outlet of a hand wheel three-way pilot valve 27 through a check valve 18 and a pipeline I15, the other outlet of the hand wheel three-way pilot valve 27 is connected with a liquid inlet end 28 of a pump 35 through a pipeline I15, an inlet of the hand wheel three-way pilot valve 27 is connected with an inlet end inner cavity 12 through a pipeline I15 and an inlet end two-way valve I19, the hand wheel three-way pilot valve 27 is provided with a hand wheel 29, and the piston inner cavity 7 is connected with an outlet end inner cavity 8 through a pipeline I15 and an outlet end two-way valve II 20, as shown in 33.

The specific description is as follows: this embodiment may employ an optional configuration of the present invention to assemble the tubing, valve, pilot valve, as shown in fig. 33, following the principles of the present invention.

The working principle is as follows:

1. starting the pump 35, allowing liquid to flow from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, opening the inlet end two-way valve I19 and the outlet end two-way valve II 20, and setting the opening degree of the inlet end two-way valve I19 to be smaller than that of the outlet end two-way valve II 20, so that the piston 6 cannot be pressed, the end surface 13 extending below the piston leaves the body outlet end inner cavity spigot 14 under the pushing of the liquid in the body inlet end inner cavity 12, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the body outlet end inner cavity spigot 14, and the valve is opened; the pressure of the inner cavity 8 at the outlet end of the valve body can be ensured to be at a set value by adjusting the hand wheel 29, so that the liquid in the inlet end 28 of the pump 35 enters the flow rate of the liquid of the hand wheel three-way pilot valve 27 through the pipeline I15 and the check valve 18 and enters the inner cavity 7 of the piston; when the liquid flow in the inlet end 28 of the pump 35 changes, the sensing die in the hand wheel three-way pilot valve 27 can control the liquid entering the piston cavity 7 through the pipeline i 15 and the check valve 18, so that the opening degree of the piston 6 can change, the pressure in the body outlet cavity 8 can not change along with the change of the liquid flow in the inlet end 28 of the pump 35, and the purpose of flow limitation is achieved.

2. The pump 35 is closed, liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, because the check valve 18 performs check on the piston inner cavity 7, the liquid in the piston inner cavity 7 cannot flow to the body inlet end inner cavity 12 through the check valve 18, the pipeline I15, the hand wheel three-way pilot valve 27 and the inlet end two-way valve I19, and cannot flow to the inlet end 28 of the pump 35 through the pipeline I15, the liquid in the body outlet end inner cavity 8 enters the piston inner cavity 7 through the outlet end two-way valve II 20 through the pipeline I15, when the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body outlet end inner cavity 8, the piston 6 moves downwards under the action of self weight, the extending end face 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flowing from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, and the valve is closed, so that the purpose of check is achieved.

Example 18

In the pressure reducing and stabilizing valve of the diaphragm-free shaft sleeve spring Z-shaped liquid control valve, the piston inner cavity 7 is connected with one inlet of the two-way valve 30 through the pipeline I15, the outlet of the two-way valve 30 passes through the outlet two-way valve II 20 and the outlet inner cavity 8 of the connector of the pipeline I15, the piston inner cavity 7 passes through the pipeline I15 and the connector of the inlet two-way valve I19 and enters the end inner cavity 12, and the top of the two-way valve 30 is provided with the screw 31 as shown in figure 34.

The specific description is as follows: this embodiment can employ an optional configuration of the present invention to assemble the tubing, valve, pilot valve, as shown in fig. 34, while following the principles of the present invention.

The working principle is as follows:

liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the inlet end two-way valve I19 and the outlet end two-way valve II 20 are opened, the opening degree of the inlet end two-way valve I19 is set to be smaller than that of the outlet end two-way valve II 20, at the moment, the piston 6 cannot be pressed, the extending end face 13 below the piston leaves the body outlet end inner cavity spigot 14 under the pushing of the liquid in the body inlet end inner cavity 12, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the body outlet end inner cavity spigot 14, and the valves are opened; the flow rate of the liquid in the piston cavity 7 entering the body outlet cavity 8 through the outlet two-way valve II 20 can be set at a value by adjusting the screw rod 31 on the two-way valve 30, so that the liquid pressure in the body outlet cavity 8 is fixed at a set value; when the liquid pressure in the body outlet end cavity 8 changes, the induction module in the two-way valve 30 can control the flow entering the body outlet end cavity 8 from the piston cavity 7, so that the opening degree of the piston 6 changes along with the change of the liquid pressure in the body outlet end cavity 8, and the purposes of pressure reduction and pressure stabilization are achieved.

Example 19

In the pressure release valve for the Z-shaped liquid control valve without the diaphragm shaft sleeve spring, the piston cavity 7 is connected with one outlet of the three-way pilot valve 32 through the pipeline I15, the other outlet of the three-way pilot valve 32 is connected with the inlet of the three-way pilot valve 32 through the outlet two-way valve II 20 and the outlet cavity 8 of the pipeline I15 connector, the body inlet cavity 12 is connected with the inlet of the three-way pilot valve 32 through the inlet two-way valve I19 and the pipeline I15, the piston cavity 7 is connected with the outlet cavity 8 of the pipeline I15 connector through the two-way valve III 33, and the top of the three-way pilot valve 32 is provided with the screw 31 as shown in figure 35.

The specific description is as follows: this embodiment can employ an optional configuration of the present invention to assemble the tubing, valve, pilot valve, as shown in fig. 35, while following the principles of the present invention.

The working principle is as follows:

1. liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, and the inlet end two-way valve I19, the outlet end two-way valve II 20 and the two-way valve III 33 are opened; liquid in the inner cavity 8 of the body outlet end enters the piston inner cavity 7 through the pipeline I15 and the two-way valve III 33 and enters the three-way pilot valve 32 through the pipeline I15 and the outlet end two-way valve II 20; when the pressure in the body outlet end inner cavity 8 rises to a set value, the liquid pressure in the body outlet end inner cavity 8 enters the three-way pilot valve 32 through the pipeline I15 and the outlet end two-way valve II 20 to open a pipeline of the three-way pilot valve 32, the pipeline of the inlet end two-way valve I19 is connected, the piston inner cavity 7 is communicated with the pipeline of the three-way pilot valve 32 through the pipeline I15 to discharge the liquid in the piston inner cavity 7 into the body inlet end inner cavity 12, the liquid quantity of the liquid in the body outlet end inner cavity 8 entering the piston inner cavity 7 from the pipeline I15 and the two-way valve III 33 is set to be smaller than the liquid quantity discharged into the body inlet end inner cavity 12 from the piston inner cavity 7, because the outer ring area of the piston 6 is larger than the inner ring area of the body outlet end inner cavity spigot 14, the piston 6 is pushed by the liquid in the body outlet end inner cavity 8 to move upwards, the lower extension end face 13 of the piston leaves the body outlet end inner cavity 14 when the piston 6 moves upwards, and the liquid in the body outlet end inner cavity 8 flows to the body inlet end inner cavity 14 to be decompressed, and the purpose of opening the valve is achieved.

2. When the liquid pressure in the valve body outlet end cavity 8 is lower than a set value, the liquid pressure in the body outlet end cavity 8 cannot open the pipeline I15 and the pipeline I19 connected with the three-way pilot valve 32 and the pipeline I15 communicated with the piston cavity 7 and entering the three-way pilot valve 32 through the pipeline I15 through the three-way pilot valve 32 and the outlet two-way valve II 20, so that the liquid in the piston cavity 7 cannot be discharged into the body inlet end cavity 12, but the liquid in the body outlet end cavity 8 can enter the piston cavity 7 through the pipeline I15 and the two-way valve III 33, when the liquid pressure in the piston cavity 7 is the same as the liquid pressure in the body outlet end cavity 8, the piston 6 moves downwards under the action of self weight, the extending end surface 13 below the piston is matched with the valve body outlet end cavity stop port 14 after the piston 6 moves downwards to seal and cut off the liquid flowing to the body inlet end cavity 12 from the body outlet end cavity 8, the valve is closed, and the valve is not released.

The above examples are set forth so that this disclosure will be thorough and complete, and will not limit the scope of the present invention.

Claims

1. A diaphragm-free shaft sleeve spring Z-shaped liquid control valve comprises a cover (1), a body (3), a sealing ring groove (4), a sealing ring (5), a piston (6), an extending end face (13) below the piston and a body outlet end inner cavity spigot (14); the method is characterized in that: the sealing ring groove (4) is arranged on the cover (1), or on the body (3), or on the cover (1) and the body (3) simultaneously, or on the seat (2) between the cover (1) and the body (3), or on the cover (1) and the seat (2) simultaneously, or on the seat (2) and the body (3) simultaneously, or on the cover (1), the seat (2) and the body (3) simultaneously;

the sealing ring (5) is arranged in the sealing ring groove (4), the piston (6) is arranged in the sealing ring (5), the cover (1) and the body (3) or the cover (1), the seat (2) and the body (3) are sealed into a whole, and the piston (6) and an extending end surface (13) below the piston form a whole; the cap (1) is internally provided with a piston inner cavity (7), and the body (3) is provided with a body inlet end inner cavity (12) and a body outlet end inner cavity (8); a body outlet end inner cavity spigot (14) is arranged between the body inlet end inner cavity (12) and the body outlet end inner cavity (8);

the outer ring (9) of the sealing ring is sealed with the groove (4) of the sealing ring, and the inner ring (10) of the sealing ring is statically sealed and slidably sealed with the outer ring (11) of the piston, so that the inner cavity (7) of the piston is sealed with the inner cavity (8) of the outlet end of the piston;

and the extending end surface (13) below the piston is matched and sealed with the body outlet end inner cavity spigot (14) after the piston (6) moves, so that the body inlet end inner cavity (12) and the body outlet end inner cavity (8) are sealed.

2. The diaphragm-free shaft sleeve spring Z-type liquid control valve of claim 1, wherein: the plane of the sealing ring groove (4) is circular, the structural shape of the cross section is a concave shape (49), the plane of the sealing ring (5) is circular, the shape of the cross section is a V-shaped (50), the plane of the piston (6) is circular, the shape of the cross section is a U-shaped (56), and the plane of the outlet end inner cavity spigot (14) is circular;

the inner diameter of play end inner chamber tang (14) is less than the external diameter of piston (6), the circle plane of sealing washer groove (4) with the circle plane interval of body play end inner chamber tang (14) is parallel, the coincidence of central line position, the circle plane central line position of sealing washer groove (4) with arrange in the coincidence of central line position of piston (6) in sealing washer (5), when sealing washer (5) were arranged in piston (6) piston outer lane (11) and sealing washer inner circle (10) contact are arranged in the direction of piston inner diameter mouth (51) of piston (6) in sealing washer (5) is towards piston inner chamber (7) or towards the opposite direction of piston inner chamber (7).

3. The diaphragm-free shaft sleeve spring Z-type liquid control valve of claim 2, wherein: the piston (6) and an extension end face (13) below the piston are vertically connected and fixed into a whole, the extension end face (13) below the piston is provided with a sealing face I (38), the sealing ring outer ring (9) and the sealing ring groove (4) are sealed, namely the sealing ring outer ring (9) has elasticity to keep in contact with the sealing ring groove (4) for sealing, the sealing ring inner ring (10) and the piston outer ring (11) are statically sealed and slidably sealed, namely the sealing ring inner ring (10) has elasticity to keep in contact with the piston outer ring (11) for static sealing and sliding sealing, the sealing ring outer ring (9) and the sealing ring inner ring (10) have elasticity to keep in elasticity, once the sealing ring expansion opening (48) is pressed by liquid, the sealing ring (5) can expand and stretch along with the increase and decrease of the liquid pressure, if the sealing ring expansion opening (48) is pressed by the liquid pressure in the opposite direction, the sealing ring (5) is installed in the sealing ring groove (4), and the sealing ring expansion opening (48) faces the piston inner cavity (7) or faces the piston inner cavity (7).

4. The diaphragm-free shaft sleeve spring Z-type liquid control valve of claim 1, wherein: the sealing ring is characterized in that the number of the sealing ring grooves (4) is 1 or more than 1, the number of the installed sealing rings (5) is the same as that of the sealing ring grooves (4), the sealing rings are matched in type, the cover (1) and the body (3) are connected in a sealing mode and fixedly connected into a whole through fasteners, and the sealing is sealed through sealing strips (52).

5. The diaphragm-free shaft sleeve spring Z-type liquid control valve of claim 1, wherein: the sealing ring groove (4) is processed on the I-shaped sealing ring groove seat (46), the number of the processed sealing ring grooves (4) is 1 or more than 1, the number of the installed sealing rings (5) is the same as that of the processed sealing ring grooves (4), the models of the installed sealing rings are matched, the I-shaped sealing ring groove seat (46) and the body (3) are connected in a sealing mode and fixedly connected into a whole through fasteners, sealing is sealed through the sealing strips (52), the cover (1) and the body (3) are connected in a sealing mode through the fasteners and fixedly connected into a whole, and sealing is sealed through the sealing strips (52).

6. The diaphragm-free shaft sleeve spring Z-type liquid control valve of claim 1, wherein: increase II type sealing washer groove seat (47) between lid (1), body (3), sealing washer groove (4) are processed on II type sealing washer groove seat (47), and the quantity of processing sealing washer groove (4) is 1 or more than 1, and the sealing washer (5) quantity of installation is the same with the sealing washer groove (4) quantity of processing, the model matches, sealing connection adopts fastener fixed connection to become a whole between lid (1), II type sealing washer groove seat (47), body (3), and is sealed to adopt sealing strip (52) to seal.

7. The diaphragm-free shaft sleeve spring Z-type liquid control valve of claim 1, wherein:

the sealing ring is characterized in that 1 cut-off opening (40) is arranged above or below the sealing ring groove (4), the ring plane of the cut-off opening (40) is parallel to the ring plane of the sealing ring groove (5) in interval, the center line positions of the cut-off openings coincide, the upper outward extending part (41) of the piston (6) or the lower end face (42) of the piston (6) is matched and sealed with the cut-off opening (40) after the piston (6) moves downwards, meanwhile, the lower extending end face (13) of the piston is matched and sealed with the body outlet end inner cavity cut-off opening (14), the upper outward extending part (41) of the piston (6) is provided with a sealing face II (53), the lower end face (42) of the piston (6) is provided with a sealing face III (54), the cover (1) and the body (3) are fixedly connected into a whole by adopting a fastening piece in a sealing mode, and the sealing is sealed by adopting a sealing strip (52).

8. The diaphragm-free shaft sleeve spring Z-type liquid control valve of claim 1, wherein:

the sealing structure is characterized in that a cut-off opening (40) is formed in the seat (2), the ring plane of the cut-off opening (40) is parallel to the ring plane of the sealing ring groove (5) in distance, the center line positions of the cut-off opening coincide, an upward outwards extending part (41) of the piston (6) or a lower end face (42) of the piston (6) is matched and sealed with the cut-off opening (40) after the piston (6) moves downwards, meanwhile, a downward extending end face (13) of the piston is matched and sealed with a body outlet end inner cavity stop opening (14), a sealing face II (53) is formed in the upward outwards extending part (41) of the piston (6), a sealing face III (54) is formed in the lower end face (42) of the piston (6), the cover (1), the seat (2) and the body (3) are fixedly connected into a whole through fasteners in a sealing mode, and sealing is sealed through a sealing strip (52).

9. The diaphragm-free shaft sleeve spring Z-type liquid control valve of claim 1, wherein:

the cover (1) is provided with a shaft rod (44) extending into the piston inner cavity (7), the contact part of the shaft rod (44) and the cover (1) is sealed, and the shaft rod (44) can axially move relative to the cover (1).

10. The diaphragm-free shaft sleeve spring Z-type liquid control valve of claim 1, wherein: the piston inner cavity (7) is connected with the body inlet end inner cavity (12) and the piston inner cavity (7) is connected with the body outlet end inner cavity (8) through a pipeline with a valve or directly connected through a pipeline; preferably, the valve is provided with an electric actuator (43), and the electric actuator (43) performs valve opening and closing.

11. The diaphragm-free shaft sleeve spring Z-type liquid control valve according to any one of claims 1 to 10, wherein:

piston inner chamber (7) are connected tee bend valve (17) through pipeline I (15), and an export of tee bend valve (17) is connected through pipeline I (15) and/or check valve (18) body entry end inner chamber (12), and another export of tee bend valve (17) is through pipeline I (15) connector play end inner chamber (8).

12. The diaphragm-free shaft sleeve spring Z-type liquid control valve according to any one of claims 1 to 10, wherein:

piston inner chamber (7) are connected through pipeline I (15), input end two-way valve I (19) body input end inner chamber (12), piston inner chamber (7) are through pipeline I (15), output end two-way valve II (20) connector output end inner chamber (8).

13. The diaphragm-free shaft sleeve spring Z-type liquid control valve according to any one of claims 1 to 10, wherein:

piston inner chamber (7) are through pipeline I (15), the entry end two-way valve I (19), half close check valve (34) connector entry end inner chamber (12), piston inner chamber (7) are through pipeline I (15), the exit end two-way valve II (20), half close check valve (34) connector exit end inner chamber (8).

14. The diaphragm-free shaft sleeve spring Z-type liquid control valve according to any one of claims 1 to 10, wherein:

the piston inner cavity (7) is connected with a tee joint I (21) through a two-way valve IV (36), two outlets of the tee joint I (21) are respectively provided with a check valve (18), the outlet of one check valve (18) is connected into the end inner cavity (12) through a pipeline I (15) and the outlet of the other check valve (18) is connected into the end inner cavity (8) through a pipeline I (15);

the piston inner cavity (7) is connected with a tee joint II (22) through a two-way valve V (37), two outlets of the tee joint II (22) are respectively provided with a check valve (18), the outlet of one check valve (18) is connected with the valve body inlet end inner cavity (12) through a pipeline I (15), and the outlet of the other check valve (18) is connected with the outlet end inner cavity (8) through a pipeline I (15).

15. The diaphragm-free shaft sleeve spring Z-type liquid control valve according to any one of claims 1 to 10, wherein:

piston inner chamber (7) are through pipeline I (15), the I (19) connector of input end two-way valve body enter end inner chamber (12), piston inner chamber (7) are through going out end two-way valve body II (20), pipeline I (15) connection ball-cock assembly (23), body goes out end inner chamber flange (24) connecting tube II (25) to in liquid pool (26).

16. The diaphragm-free shaft sleeve spring Z-type liquid control valve according to any one of claims 1 to 10, wherein:

piston inner chamber (7) are through an export that check valve (18), pipeline I (15) connect tee bend pilot valve (27), another export of tee bend pilot valve (27) is through liquid admission end (28) of pipeline I (15) connection pump (35), the entry of tee bend pilot valve (27) is through pipeline I (15), admission two-way valve I (19) connector admission inner chamber (12), piston inner chamber (7) are through pipeline I (15), play two-way valve II (20) connector play end inner chamber (8).

17. The diaphragm-free shaft sleeve spring Z-type liquid control valve according to any one of claims 1 to 10, wherein:

the piston inner chamber (7) is connected with an inlet of the two-way valve (30) through a pipeline I (15), an outlet of the two-way valve (30) is connected with an outlet inner chamber (8) through an outlet two-way valve II (20) and a pipeline I (15), the piston inner chamber (7) is connected with an inlet inner chamber (12) through a pipeline I (15) and an inlet two-way valve I (19), and the top of the two-way valve (30) is provided with a screw rod (31).

18. The diaphragm-free shaft sleeve spring Z-type liquid control valve according to any one of claims 1 to 10, wherein:

the piston inner chamber (7) is through an export that pipeline I (15) are connected tee bend pilot valve (32), another export of tee bend pilot valve (32) is through going out end two-way valve II (20), pipeline I (15) connector play end inner chamber (8), the entry that tee bend pilot valve (32) are connected through entry two-way valve I (19), pipeline I (15) to body entry end inner chamber (12), piston inner chamber (7) are through two-way valve III (33), pipeline I (15) connector play end inner chamber (8), there is a screw rod (31) at the top of tee bend pilot valve (32).