CN108843886B

CN108843886B - Exhaust valve

Info

Publication number: CN108843886B
Application number: CN201810848127.7A
Authority: CN
Inventors: 何锐; 韩安伟; 陈士伟
Original assignee: Anhui Redstar Valve Co Ltd
Current assignee: Anhui Redstar Valve Co Ltd
Priority date: 2018-07-27
Filing date: 2018-07-27
Publication date: 2024-03-12
Anticipated expiration: 2038-07-27
Also published as: CN108843886A

Abstract

The invention provides an exhaust valve, which comprises a main valve body, a main valve cover, a valve clack, a floating ball component and a first micro exhaust valve, wherein the main valve cover is covered on the main valve body and bears the valve cover, an air suction hole is formed in the main valve cover, the separation or contact between the valve clack and the main valve cover controls the opening or closing of the air suction hole, an exhaust hole is further formed in the main valve cover, the separation or contact between the floating ball component and the main valve cover controls the opening or closing of the exhaust hole, the exhaust valve further comprises a locking mechanism, the locking mechanism comprises a locking component and a water level control box connected with the locking component, and the locking component can be embedded into the floating ball component under the action of water pressure of the water level control box so as to lock the working position of the floating ball component when the exhaust hole is sealed. The exhaust valve provided by the invention can automatically realize the opening and closing of the exhaust hole by arranging the locking mechanism, has high automation degree and reduces manual operation.

Description

Exhaust valve

Technical Field

The invention relates to the technical field of fluid control, in particular to an exhaust valve.

Background

The exhaust valve is used for adjusting air reserved in a pipeline system, and is widely applied to engineering fields such as water supply and drainage, shipbuilding, fluid transportation and the like. The development of science and technology and the continuous and deep recognition of engineering practice are improved, and people find that a part of air trapped in a pipeline system can absorb the energy of water hammer waves, and the impact of the water hammer on the pipeline system is reduced by utilizing the elasticity of the trapped air, so that the pipeline system is protected. The exhaust valve used in the pipeline system is required to be capable of exhausting rapidly at the initial stage of pipeline operation, actively intercepting part of air after exhausting rapidly at the initial stage, continuously exhausting the air separated out of the pipeline when the pipeline system is in normal operation, and rapidly sucking the air when the pipeline system is in negative pressure so as to improve the stability and reliability of the pipeline system.

However, the existing exhaust valve needs to be opened by manually operating the exhaust port to finish quick exhaust, so that the degree of automation is low, and the operation is not convenient.

Disclosure of Invention

In view of the foregoing, there is a need for an improved vent valve that automatically completes the venting process, is convenient to operate, and has a high degree of automation.

The invention provides an exhaust valve, which comprises a main valve body, a main valve cover, a valve clack, a floating ball component and a first micro exhaust valve, wherein the main valve cover is covered on the main valve body and bears the valve cover, an air suction hole is formed in the main valve cover, the separation or contact between the valve clack and the main valve cover controls the opening or closing of the air suction hole, an exhaust hole is further formed in the main valve cover, the separation or contact between the floating ball component and the main valve cover controls the opening or closing of the exhaust hole, the exhaust valve further comprises a locking mechanism, the locking mechanism comprises a locking component and a water level control box connected with the locking component, and the locking component can be embedded into the floating ball component under the action of water pressure of the water level control box so as to lock the working position of the floating ball component when the exhaust hole is sealed.

Further, the locking assembly further comprises a locking piece and a transmission piece connected to the locking piece, the transmission piece is acted by water currents with different heights in the water level control box, and the locking piece moves under the driving of the transmission piece to lock the working position of the floating ball assembly when the exhaust hole is sealed.

Further, the locking assembly further comprises a second reset piece, the second reset piece elastically acts on the locking piece, and the locking piece stretches and contracts under the action of water currents with different heights in the water level control box and the elastic action of the second reset piece so as to lock the working position of the floating ball assembly when the exhaust hole is sealed.

Further, the driving medium is the clamp plate, the quantity of clamp plate is two, two press from both sides between the clamp plate and set up a diaphragm, locking assembly still including set up in mount on the main valve lid, the cavity has been seted up to the inside of mount, locking piece, clamp plate, diaphragm, second reset piece all hold in the cavity, the both ends of diaphragm are fixed in on the inner wall of mount and will the cavity is kept apart into first cavity and second cavity, hold in the clamp plate in the first cavity receives the hydraulic pressure effect of the not high rivers in the water level control box and drive locking piece motion.

Further, the locking assembly further comprises a hose, one end of the hose is communicated with the water level control box, the other end of the hose is communicated with the first chamber, and water pressure in the water level control box is transmitted to a pressing plate located in the first chamber through the hose.

Further, the driving medium is the body, the water level control box include with box and the lid of main valve body intercommunication are located apron on the box, the body set up in the inside of box, be provided with on the apron and stretch into back shaft in the box, locking piece and second reset piece all inlay and locate in the back shaft, set up on the back shaft and supply the through-hole that the floater subassembly stretched into, set up the bell mouth on the body, the body passes through the bell mouth cover is established the back shaft, the bell mouth is close to the one end of apron is kept away from the one end of apron contracts gradually, the locking piece is in the butt of body inner wall is held down the embedding in the floater subassembly in order to lock the floater subassembly the working position when sealing the exhaust hole.

Further, the locking assembly further comprises a collar, and the collar is sleeved with the locking piece and fixedly connected with the box body.

Further, a drain pipe is further arranged between the water level control box and the main valve body, and a control valve is arranged on the drain pipe and used for controlling the fluid flow in the drain pipe.

Further, a first through hole is formed in the valve clack and communicated with the exhaust hole, and the inner diameter of the first through hole is larger than the outer diameter of the floating ball assembly.

Further, the air suction hole is annular, and the valve clack is matched with the annular air suction hole and seals the air suction hole.

According to the exhaust valve provided by the invention, the exhaust hole can be automatically opened and closed by arranging the locking mechanism, so that the degree of automation is high, and the manual operation is reduced.

Drawings

Fig. 1 is a schematic structural view of an exhaust valve in a first embodiment of the present invention.

Fig. 2 is an enlarged schematic view of the exhaust valve at a shown in fig. 1.

Fig. 3 is a schematic structural view of a first micro exhaust valve in the exhaust valve shown in fig. 1.

Fig. 4 is an enlarged schematic view of the exhaust valve B shown in fig. 1.

FIG. 5 is a schematic view showing the structure of the exhaust valve at C in FIG. 4

Fig. 6 is a schematic structural view of an exhaust valve in a second embodiment of the present invention.

Fig. 7 is an enlarged schematic view of fig. 6 illustrating a position D in the exhaust valve.

Fig. 8 is an enlarged schematic view of the exhaust valve E shown in fig. 7.

Description of the main reference signs

The invention will be further described in the following detailed description in conjunction with the above-described figures.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an exhaust valve 100 according to a first embodiment of the present invention, the exhaust valve 100 is used for adjusting an air amount in a pipeline system, rapidly discharging air retained in the pipeline system in an initial operation period, and the exhaust valve 100 can actively retain a portion of air after the rapid exhaust, and is used for buffering an air amount of a water hammer shock wave in the retained portion of the pipeline system; the exhaust valve 100 can continuously exhaust the air precipitated in the pipeline when the pipeline system is in normal operation, and can rapidly suck the air when the pipeline system is in a negative pressure state, so that the pressure of the pipeline system is balanced. The use of the exhaust valve 100 can better protect the pipeline system and improve the reliability and stability of the pipeline system.

In the present embodiment, the exhaust valve 100 is applied to the field of water supply and drainage engineering. It will be appreciated that in other embodiments, the vent valve 100 may be used in other plumbing applications such as shipbuilding, fluid transportation, and the like.

The exhaust valve 100 comprises a main valve body 10, a main valve cover 20, a valve clack 30, a valve cover 40, a floating ball assembly 50, a first micro exhaust valve 60 and a locking mechanism 70, wherein the main valve cover 20 is covered on the main valve body 10 and bears the valve cover 40, the valve clack 30 is connected with the main valve cover 20, the floating ball assembly 50 is accommodated in the main valve body 10, the first micro exhaust valve 60 is connected with the main valve body 10 and is communicated with a cavity in the main valve body 10, part of the locking mechanism 70 is arranged on the valve clack 30 and is accommodated in the valve cover 40, and the rest part is arranged on the valve cover 40.

The main valve body 10 is used for bearing and fixing the main valve cover 20, the valve clack 30, the floating ball assembly 50 and the first micro exhaust valve 60, the main valve cover 20 is used for bearing and fixing the valve clack 30 and the valve cover 40, the valve clack 30 is used for bearing and fixing the locking mechanism 70, the valve clack 30 and the floating ball assembly 50 are independently controlled to control the opening and closing of different exhaust holes on the main valve cover 20, the valve cover 40 is communicated with the external environment, the exhaust valve 100 is used for exhausting air, the first micro exhaust valve 60 is used for continuously exhausting air separated out from a pipeline when the pipeline system is in normal operation, and the locking mechanism 70 is used for locking the working position of the floating ball assembly 50, so that the floating ball assembly 50 can continuously close the exhaust valve 100. The float ball assembly 50 opens or closes the exhaust valve 100 under the control of the locking mechanism 70 to change the operating state of the exhaust valve 100, thereby realizing the regulation of the air quantity remaining in the pipe system.

Openings (not numbered) are formed at both ends of the main valve body 10, one end of the main valve body 10 is connected with a spigot of the main valve cover 20, the other end is communicated with an external pipeline system, and water flow in the external pipeline system enters the interior of the exhaust valve 100 from one end of the main valve body 10, which is far away from the main valve cover 20. The inside of the main valve body 10 is provided with a support 11 for supporting the float ball assembly 50, and the support 11 is connected to the inner wall of the main valve body 10.

The support 11 extends along the axial direction of the main valve body 10 at one side adjacent to the valve flap 30 and forms an annular protrusion 111, and the protrusion 111 is used for bearing the floating ball assembly 50. Further, the end surface of the protrusion 111 contacting with the floating ball assembly 50 is configured to be a curved surface to match the spherical surface of the floating ball assembly 50, so as to improve the stability of the supporting member 11 when carrying the floating ball assembly 50.

A first reset piece 112 is further arranged between the main valve body 10 and the valve clack 30, one end of the first reset piece 112 abuts against the valve clack 30, the other end abuts against the limiting plate 112, and the limiting plate 112 penetrates through the first reset piece 112 to limit radial offset of the first reset piece 112.

In this embodiment, the first restoring member 112 is a spring, and the supporting member 11 and the main valve body 10 are integrally formed by casting, three-dimensional printing, etc. to improve the connection strength between the supporting member 11 and the main valve body 10. It can be appreciated that in other embodiments, the first restoring member 112 may be another type of elastic element such as an elastic column, and the supporting member 11 and the main valve body 10 may be in a split structure, so as to reduce the production cost, and at this time, the supporting member 11 and the main valve body 10 may be fixed by welding, riveting, and glue-fixing.

The supporting member 11 is also provided with a water through hole 113 for water to pass through, and water can enter the cavity of the main valve body 10 where the floating ball assembly 50 is located through the water through hole 113. In the present embodiment, the water passage 113 is formed at the substantially center of the annular protrusion 111. It will be appreciated that in other embodiments, the water through holes 113 may be formed at other positions of the supporting member 11.

The side wall of the main valve body 10 is also provided with a connecting hole 12, and the connecting hole 12 is used for communicating the first micro exhaust valve 60, so that the first micro exhaust valve 60 is communicated with the cavity of the main valve body 10, and the first micro exhaust valve 60 can continuously exhaust the air precipitated in the pipeline.

In the present embodiment, the limiting plate 112 is screwed to the support 11, and the main valve body 10 is screwed to the main valve cover 20. It will be appreciated that in other embodiments, the limiting plate 112 and the supporting member 11 may be fixed to each other by other connection methods such as glue, riveting, etc., and the main valve body 10 and the main valve cover 20 may be fixed to each other by other connection methods such as glue, riveting, etc.

The main valve cover 20 is connected with one end spigot of the main valve body 10 and carries a valve cover 40, the main valve cover 20 is provided with an air suction hole 21 for controlling the opening and closing of the valve clack 30, the shape of the air suction hole 21 is matched with that of the valve clack 30, and the contact or separation between the valve clack 30 and the air suction hole 21 can control the opening and closing of the air suction hole 21.

In the present embodiment, the suction hole 21 is substantially annular, and the valve flap 30 is also substantially annular. It will be appreciated that in other embodiments, the suction hole 21 may be open to other shapes than annular, as long as the valve flap 30 enables a contact seal to the suction hole 21.

The main valve cover 20 is further provided with a first valve seat 22 matched with the valve clack 30, a through hole (not numbered) communicated with the air suction hole 21 is formed in the central portion of the first valve seat 22, and the shape of the first valve seat 22 is matched with that of the valve clack 30.

In the present embodiment, the main valve cover 20 and the valve cover 40 are screwed together. It will be appreciated that in other embodiments, the main valve cover 20 and the valve cover 40 may be fixed to each other by riveting, welding, or the like.

The main valve cover 20 is provided at a substantially center thereof with an exhaust hole 23 communicating with the inner chamber of the main valve body 10, and the exhaust hole 23 is opened and closed under the control of the float ball assembly 50. The main valve seat 20 is further provided with a second valve seat 24, a through hole (not numbered) communicating with the exhaust hole 23 is opened at a central portion thereof, and the shape of the second valve seat 24 is matched with the shape of the float ball assembly 50.

The valve flap 30 abuts against the first valve seat 22 on the main valve cover 20 under the action of the first reset member 112, thereby sealing the suction hole 21 formed in the main valve cover 20. The valve clack 30 is provided with an annular groove (not numbered) at one side adjacent to the first reset element 112, and the annular groove is used for embedding the first reset element 112, so that the first reset element 112 can respectively prop against the valve clack 30 and the supporting element 11, and after the exhaust valve 100 is converted from a negative pressure state to a positive pressure state, the valve clack 30 can reset and seal the air suction hole 21 under the elastic action of the first reset element 112.

The valve clack 30 is provided with a first through hole 31 for the floating ball assembly 50 to pass through, the first through hole 31 penetrates through two end surfaces of the valve clack 30 and is communicated with the exhaust hole 23, the aperture of the first through hole 31 is larger than the outer diameter size of the floating ball assembly 50, and the floating ball assembly 50 can pass through the valve clack 30 and the exhaust hole 23 formed on the main valve cover 20 along with the rising of the water level in the main valve seat 10.

In this embodiment, the valve clack 30 is annular, the first through hole 31 is circular, and the floating ball assembly 50 passes through the valve clack 30 to reach the main valve cover 20 through the circular first through hole 31. It will be appreciated that in other embodiments, the valve flap 30 may have a shape other than a ring shape, such as a rectangle, a rounded rectangle, etc., and the first through hole 31 may have a regular shape, or may have an irregular shape, so long as the floating ball assembly 50 can pass through the first through hole 31.

The valve housing 40 is provided on the main valve cover 20, the interior of the valve housing 40 forms a space for accommodating the partial locking mechanism 70, the space inside the valve housing 40 communicates with the external environment, and when the suction hole 21 or the exhaust hole 23 is opened, the exhaust valve 100 can exhaust the air inside the pipe system through the valve housing 40. The valve housing 40 accommodates a portion of the lock mechanism 70, and can isolate the lock mechanism 70 from the external environment, thereby protecting the lock mechanism 70 better.

The float ball assembly 50 comprises a float ball 51 and a guide rod 52 penetrating through the center of the float ball 51, wherein the float ball 51 is fixedly connected with the guide rod 52, the interior of the float ball 51 is hollow, and the float ball 51 is arranged at a bulge 111 formed on the main valve body 10 and can rise and fall along with the rise and fall of the water level in the exhaust valve 100; when the water level in the exhaust valve 100 exceeds the protrusion 111 for carrying the floating ball 51, the floating ball 51 can rise along with the water level under the limiting action of the limiting plate 112, and when the water level in the exhaust valve 100 falls, the floating ball 51 falls along with the falling of the water level until the floating ball 51 is limited by the protrusion 111.

Referring to fig. 2 together, fig. 2 is an enlarged schematic diagram of the exhaust valve 100 at a shown in fig. 1, wherein one end of the guide rod 52 is penetrated through the float ball 51, the other end extends into the locking mechanism 70, a fixing groove 521 is formed at a portion of the guide rod 52 between the float ball 51 and the valve cover 40, the fixing groove 521 is formed annularly along a circumferential direction of the guide rod 52, and the fixing groove 521 is used for partially embedding the locking mechanism 70, so as to fix the relative positions of the guide rod 52 and the float ball 51 in the exhaust valve 100.

In this embodiment, the fixing groove 521 includes a middle portion having a cylindrical shape and two end portions having a cylindrical shape. It will be appreciated that in other embodiments, the fixing groove 521 may take other shapes, so long as a portion of the locking mechanism 70 can be inserted into and fix the positions of the guide rod 52 and the floating ball 51.

Referring to fig. 3, fig. 3 is a schematic diagram of the first micro exhaust valve 60 in the exhaust valve 100 shown in fig. 1. The first micro exhaust valve 60 is connected to the main valve body 10 through a pipe 601, and the pipe 601 is communicated with a connecting hole 12 formed in the main valve body 10. In the present embodiment, the conventional lever-type micro exhaust valve is used as the first micro exhaust valve 60, and the first micro exhaust valve 60 has better exhaust performance. The first micro exhaust valve 60 includes a side valve body 61, a floating core 62, a sealing sleeve 63, and an exhaust filter 64, the side valve body 61 is provided with an exhaust port (not shown), the floating core 62 is hollow and is accommodated in the side valve body 61, the sealing sleeve 63 is disposed on the side valve body 61, and the exhaust filter 64 is disposed at the exhaust port provided by the side valve body 61.

When the air in the pipeline system enters the first micro exhaust valve 60 through the pipeline 601 connected with the main valve body 10, the water level in the side valve body 61 drops and drives the floating core 62 to drop, the dropping of the floating core 62 drives the sealing sleeve 63 arranged on the floating core 62 to be separated from the exhaust filter screen 64, and the air is discharged through the exhaust filter screen 64 and the exhaust port formed in the side valve body 61.

It can be appreciated that other components such as a sealing ring may be further disposed in the first micro exhaust valve 60 to enhance the reliability and stability of the first micro exhaust valve, and these components are not the focus of the present disclosure and will not be described herein.

It is to be understood that the first micro exhaust valve 60 is not limited to the lever type micro exhaust valve described above. In other embodiments, the first micro exhaust valve 60 may be a lever type micro exhaust valve of other structures, or may be a micro exhaust valve of other forms such as a roller shutter type.

Referring to fig. 4 together, fig. 4 is an enlarged schematic diagram of a position B of the exhaust valve 100 shown in fig. 1, the locking mechanism 70 includes a water level control box 71, a second micro exhaust valve 72, and a locking assembly 73, wherein the water level control box 71 is disposed on the valve housing 40 and carries the second micro exhaust valve 72, the second micro exhaust valve 72 is in fluid communication with a chamber in the water level control box 71 for accommodating fluid, the locking assembly 73 is disposed on the main valve cover 20 and is connected to the water level control box 71, the water level control box 71 is used for providing self-locking for the locking assembly 73 according to a water level in the pipeline system, the second micro exhaust valve 72 is used for continuously precipitating air to be exhausted from the water level control box 71, and the locking assembly 73 is used for locking a position of the floating ball assembly 50.

The water level control box 71 includes a box body 711 connected to the valve housing 40 and a cover plate 712 connected to the second micro exhaust valve 72, and the cover plate 712 is disposed at an opening of the box body 711. The inside cavity that is used for holding rivers that is equipped with of box 711, box 711 pass through the cavity that keeps away from valve bonnet 40 one end in the main valve body 10 of drain pipe 713 intercommunication, are provided with the control valve 714 that is used for controlling drain pipe 713 break-make between drain pipe 713 and the main valve body 10.

The cover plate 712 is provided with a through hole (not numbered) for communicating with the second micro exhaust valve 72, and air retained in the box body 711 enters the second micro exhaust valve 72 through the through hole and is discharged to the outside; the corresponding positions of the housing 711 and the valve cover 40 are provided with communication holes 715, and the communication holes 715 are used for communicating the chamber inside the housing 711 with part of the locking assembly 73.

In the present embodiment, the housing 711 is integrally formed with the valve housing 40, the second micro exhaust valve 72 is screwed to the cover plate 712, the housing 711 is screwed to the cover plate 712, and the control valve 714 is a needle valve.

It will be appreciated that in other embodiments, a separate structure may be further adopted between the housing 711 and the valve housing 40, and the housing 711 and the valve housing 40 may be fixed by a connection manner such as threads, riveting, or glue; the second micro exhaust valve 72 and the cover plate 712 can be connected with each other by riveting, glue fixing and other connection modes; the box body 711 and the cover plate 712 can also be connected with each other by adopting other connection modes such as riveting, glue fixation and the like; the control valve 714 may also employ other types of valves other than needle valves.

In this embodiment, the second micro exhaust valve 72 and the first micro exhaust valve 60 are lever type micro exhaust valves of the conventional type, and also include a side valve body, a floating core, a sealing sleeve and an exhaust filter screen, and the specific structure is described above and will not be repeated here.

It will be appreciated that in other embodiments, the second micro exhaust valve 72 may also be a different structure than the first micro exhaust valve 60, such as a roller shutter type micro exhaust valve.

When the water level in the water level control box 71 rises, air enters the side valve body in the second micro exhaust valve 72, the water level in the side valve body drops and drives the floating core to drop, the dropping of the floating core drives the sealing sleeve arranged on the floating core to be separated from the exhaust filter screen, and the air is exhausted through the exhaust filter screen and the exhaust port formed in the side valve body; when the water level in the water level control box drops, the floating core descends along with the drop of the water level, the floating core descends to drive the sealing sleeve arranged on the floating core to seal the exhaust filter screen, and external air enters the second micro exhaust valve 72 and the water level control box 71 through the exhaust filter screen and the exhaust port formed in the side valve body.

It can be appreciated that other components such as a sealing ring may be further disposed in the second micro exhaust valve 72 to enhance its reliability and stability, and these components are not the focus of this disclosure and will not be described herein.

It will be appreciated that in other embodiments, other types of venting elements may be used for the second micro-exhaust valve 72, provided that the proper venting or suction of air within the water level control box 71 is achieved. Of course, if the sealing of the water level control tank 71 is not considered, the second minute exhaust valve 72 may be omitted as long as the sealing closure of the water level control tank 71 after full water can be achieved.

Referring to fig. 5, fig. 5 is a schematic diagram of the structure of the exhaust valve 100 at C shown in fig. 4, and the locking assembly 73 includes a fixing frame 731, a driving member 732, a diaphragm 733, a locking member 734, a second restoring member 735, and a flexible tube 736. The transmission piece 732, the diaphragm 733, the locking piece 734 and the second reset piece 735 are all accommodated in the hollow cavity in the fixing frame 731, the number of the transmission pieces 732 is two, the diaphragm 733 is clamped between the two transmission pieces 732, the locking piece 734 penetrates through the two transmission pieces 732 and is fixedly connected with the two transmission pieces 732, one end of the second reset piece 735 abuts against the fixing frame 731, the other end abuts against the locking piece 734, and the hose 736 is communicated with the cavity formed in the fixing frame 731 and is communicated with the water level control box 71. The water pressure in the water level control box 71 acts on the transmission member 732 through the hose 736, so that the locking member 734 fixedly connected with the transmission member 732 is driven to be embedded into the first floating ball 51 in the floating ball assembly 50, and the locking effect of the locking member 734 on the first floating ball 51 is realized. Hose transfer element 732

The fixing frame 731 is fastened to the valve clack 31, and the fixing frame 731 is provided with a through hole 7311 into which the guide rod 52 extends, the through hole 7311 extends in a vertical direction and penetrates through two end surfaces of the fixing frame 731, and the guide rod 52 extends into the through hole 7311 and can ascend or descend in the through hole 7311 along with the change of the water level in the valve body 10.

In the present embodiment, the through hole 7311 is formed at a substantially center of the fixing frame 731, and a cross section of the through hole 7311 is circular to match a circular rod of the guide rod 52. It is to be understood that in other embodiments, the through hole 7311 may be formed at other positions of the fixing frame 731, and the through hole 7311 may have a shape other than a circular shape.

The fixing frame 731 is further provided with a second through hole 7312, a third through hole 7313, a fourth through hole 7314, a fifth through hole 7315 and a sixth through hole 7316 in sequence, the second through hole 7312, the third through hole 7313, the fourth through hole 7314, the fifth through hole 7315 and the sixth through hole 7316 are mutually communicated, the second through hole 7312 is used for communicating a hose 736, the third through hole 7318 is used for accommodating a portion of the locking piece 734 extending out of the transmission piece 732, the fourth through hole 7314 is used for accommodating two transmission pieces 732 and a diaphragm 733 clamped between the two transmission pieces 732, the fifth through hole 7315 is used for accommodating a second reset piece 735, and the sixth through hole 7316 is used for allowing the locking piece 734 to penetrate out and extend into the through hole 7311 accommodating the guide rod 52 after being communicated with the through hole 7311.

In the present embodiment, the fixing frame 731 is screwed to the valve flap 30. It will be appreciated that in other embodiments, the fixing frame 731 and the valve clack 30 may be fixed by glue, riveting, or other connection methods.

The driving member 732 is used for transmitting the water pressure in the water level control tank 71 and driving the locking member 734 to move. In this embodiment, the driving members 732 are pressing plates for carrying hydraulic force, the number of the driving members 732 is two, the diaphragms 733 are sandwiched between the two driving members 732, the two diaphragms 732 and the diaphragms 733 sandwiched therebetween are all disposed in the fourth through holes 7314 formed in the fixing frame 731, each driving member 732 is fixed to the diaphragms 733, the two driving members 732 are symmetrically disposed with respect to the diaphragms 733, the driving members 732 are fixedly connected to the locking members 734, the two driving members 732 and the diaphragms 733 form a movable pair for driving the locking members 734 to stretch in the fixing frame 731, and the diameter of the fourth through holes 7314 is larger than the width of the whole formed by the two driving members 732 and the diaphragms 733, so as to form a space for the two driving members 732 to reciprocate in the fourth through holes 7314.

Through holes (not numbered) for the locking piece 734 to pass through are formed in the approximate centers of the two transmission pieces 732 and the diaphragm 733, and the length of the transmission piece 732 along the direction of the guide rod 52 is larger than the length of the third through hole 7313 along the direction of the guide rod 52, so that the stress area of the transmission piece 732 is increased, and the operating efficiency is improved.

It will be appreciated that in other embodiments, the two transmission members 732 and the diaphragm 733 may have a through hole for the locking member 734 to pass through, so long as the through hole is capable of allowing the locking member 734 to pass through.

When the transmission member 732 adopts a pressing plate, the level of the liquid level in the water level control box 71 is fed back to the pressing plate through the hydraulic force, and when the liquid level in the water level control box 71 is relatively high. The pressure plate receives relatively large hydraulic force; when the liquid level in the water level control tank 71 is relatively low. The pressure plate is subjected to relatively small hydraulic force.

It will be appreciated that in other embodiments, the driving member 732 may be a driving member such as an oil cylinder, so long as the driving member 732 is capable of transmitting the hydraulic force in the water level control tank 71 and moving the locking member 734.

In the present embodiment, the transmission member 732 is fixedly connected to the diaphragm 733. It will be appreciated that in other embodiments, the driving member 732 and the diaphragm 733 may be fixed to each other by other connection means besides glue.

One side surface of the diaphragm 733 is fixedly connected to one transmission member 732, the other side surface is fixedly connected to the other transmission member 732, and two ends of the diaphragm 733 are embedded into the inner wall of the fourth through hole 7314, so that the fixed connection between the diaphragm 733 and the fixing frame 731 is realized. The diaphragm 733 has elasticity, the diaphragm 733 divides the hollow chamber formed in the fixing frame 731 into two parts, the first chamber 7331 includes the second through hole 7312, the third through hole 7313 and the part of the fourth through hole 7314, the second chamber 7332 includes the remaining part of the fourth through hole 7314 and the fifth through hole 7315 and the sixth through hole 7316, the first chamber 7331 and the second chamber 7332 are isolated from each other, the diaphragm 733 isolates the water flow flowing from the hose 736 into the fixing frame 731, so that the water flow has a hydraulic pressure effect on only one of the two diaphragms 733, and no hydraulic pressure effect exists between the other diaphragm 733. When the water pressure is transmitted to the transmission member 732 in the first chamber 7331 through the hose 736, the transmission member 732 elastically moves to the side wall of the fourth through hole 7314 adjacent to the fifth through hole 7315 under the action of the water pressure, thereby driving the locking member 734 to move.

Due to the isolation of the diaphragm 733, the pressure of the water flow can be effectively applied to the transmission member 732, so that the water flow is prevented from bypassing the transmission member 732 and directly flowing to the end of the locking member 734, which is close to the guide rod 52, and the actuation reliability of the pressure plate 733 is improved.

The locking member 734 is accommodated in the third through hole 7313, the fourth through hole 7314, the fifth through hole 7315 and the sixth through hole 7316, one end of the locking member 734 is fixed to the two driving members 732 and protrudes out of the driving members 732, and the other end is accommodated in the sixth through hole 7316. The end of the locking piece 734 extending out of the transmission piece 732 is provided with a threaded fastener 737, the threaded fastener 737 is sleeved with the end of the locking piece 734 extending out of the transmission piece 732 and is accommodated in the third through hole 7313, the locking piece 734 is fixedly connected with the transmission piece 732 under the fixing action of the threaded fastener 737, and the locking piece 734 can realize reciprocating telescopic motion under the driving of reciprocating rebound motion of the transmission piece 732. The middle part of the locking piece 734 of the transmission piece 732 is convexly provided with a protrusion 7341, the protrusion 7341 abuts against the transmission piece 732, and the transmission piece 732 is fixedly connected with the locking piece 734 under the extrusion action of the threaded fastener 737 and the protrusion 7341. The portion of the locking member 734 received in the sixth through hole 7316 can extend into the fixing groove 521 formed in the guide rod 52, so that the locking member 734 can fix the moving position of the guide rod 52.

In this embodiment, one end of the locking member 734 inserted into the fixing groove 521 is tapered to match the tapered shape of the fixing groove 521 and guide the insertion process of the locking member 734 into the fixing groove 521, so as to improve the stability of the locking action of the locking member 734 on the guide rod 52.

In this embodiment, the driving member 732 and the locking member 734 are fixed to each other by screw connection of a screw fastener 737. It will be appreciated that in other embodiments, the driving member 732 and the locking member 734 may be fastened to each other by using other connection methods such as glue, rivet, etc., and the threaded fastener 737 may be omitted.

The second restoring member 735 is accommodated in the fifth through hole 7315, one end of the second restoring member 735 abuts against the fixing frame 731, the other end abuts against the diaphragm 733, and the second restoring member 735 is used for restoring the diaphragm 733, so that the locking member 734 is separated from the fixing slot 521 formed on the guide rod 52, and free movement of the guide rod 52 is restored, and locking of the floating ball assembly 50 is released.

In this embodiment, the second restoring member 735 is a spring. It will be appreciated that in other embodiments, the second restoring member 735 may also employ other types of resilient members such as resilient posts.

One end of the hose 736 is communicated with the water level control box 71, the other end is communicated with the second through hole 7312 on the fixing frame 731, and water flow in the water level control box 71 can enter the fixing frame 731 through the hose 736 and the second through hole 7312 and act on the transmission member 732.

Because the flexible tube 736 has elasticity and proper reserved length, when the locking assembly 73 moves along with the valve clack assembly 30, the elasticity and reserved length of the flexible tube 736 can meet the running stroke of the locking assembly 73, so that the flexible tube 736 can continuously transmit water flow during the movement of the locking assembly 73, and the risk of detachment due to movement is reduced.

The principle of self-locking of the locking mechanism 70 to the float assembly 50 is briefly described as follows:

when water flow is continuously injected into the main valve body 10, that is, the floating ball assembly 50 continuously floats along with the water level, the water flow in the main valve body 10 enters the water level control box 71 along the control valve 714 and the drain pipeline 713 under the driving of the water pressure, the water flow in the water level control box 71 acts on the transmission member 732 through the hose 736, and when the water flow in the water level control box 71 continuously rises, the water flow pressure acting on the transmission member 732 through the hose 736 is also greater; when the water flow in the water level control box 71 continuously rises to a preset height, that is, when the water flow pressure acting on the transmission members 732 through the hose 736 increases to a preset threshold value, the water flow pressure received by the transmission member 732 adjacent to the through hole 7311 in the two transmission members 732 is greater than the elastic force of the second reset member 735 received by the other transmission member 732, the transmission member 732 provides the movement trend of the locking member 734 extending out of the third through hole 7313, at this time, because the floating ball assembly 50 is not fully floating, the movement trend of the locking member 734 extending out of the third through hole 7313 is blocked by the guide rod 52, that is, at this time, the guide rod 52 abuts against one end of the locking member 734; when the water level in the main valve body 10 is continuously raised, the guide rod 52 is also continuously raised, and when the guide rod 52 moves to a proper height, the fixing groove 521 on the guide rod 52 is aligned with the locking piece 734, and the locking piece 734 is embedded into the fixing groove 521 on the guide rod 52, and at the moment, the guide rod 52 and the locking piece 734 are embedded and fixed, so that the locking process of the locking mechanism 70 on the floating ball assembly 50 is realized;

When the water level in the main valve body 10 drops, the water level stored in the water level control box 71 continuously drops, the water pressure provided by the water level control box 71 to the driving member 732 continuously decreases, and when the water level in the water level control box 71 continuously drops below a preset level, that is, when the water pressure acting on the driving member 732 through the hose 736 drops to a preset threshold value, the water pressure received by the driving member 732 adjacent to the through hole 7311 in the two driving members 732 is smaller than the elastic force of the second reset member 735 received by the other driving member 732, the driving member 732 drives the locking member 734 to move in a direction away from the guide rod 52, the locking member 734 extends out of the fixing groove 521 formed on the guide rod 52, the locking member 734 is separated from the guide rod 52, and the locking member 734 releases the locking of the guide rod 52, thereby completing the unlocking process of the floating ball assembly 50 by the locking mechanism 70.

It will be appreciated that the provision of a different second reset member 735 can adjust the predetermined threshold values during the above-described latching and unlatching process.

The locking mechanism 70 has a function of time-lapse unlocking, when the water flow in the water level control box 71 is higher than a preset height, the water flow in the water level control box 71 needs to flow back into the valve body 10 through the control valve 714 and the drain pipe 713, and when the water flow in the water level control box 71 falls below the preset height, the locking mechanism 70 performs an unlocking process. Since the control valve 714 can control the flow rate of the fluid in the drain pipe 713, the falling speed of the water flow is controlled, so that the locking mechanism 70 performs the unlocking process only after the time when the water level gradually falls to the preset height, thereby realizing the delayed unlocking of the locking mechanism 70.

The delayed unlocking function of the locking mechanism 70 allows the locking mechanism 70 to be unlocked only when the exhaust valve 100 is in a low water level state for a long time, so that frequent unlocking and locking operations of the locking mechanism 70 are avoided when the water level in the exhaust valve 100 fluctuates, and the reliability and stability of the locking mechanism 70 are improved.

The operation of the exhaust valve 100 in different transportation states of the piping system will be briefly described as follows:

(1) When the pipe system is in an initial water-passing state: at this time, water flow just enters the pipeline system, the valve clack 30 on the exhaust valve 100 seals the air suction hole 21 formed on the main valve cover 20 under the action of the first reset piece 112, and as the water flow just enters the pipeline system, the water level in the main valve body 10 is not high, and a distance exists between the floating ball assembly 50 and the exhaust hole 23 formed on the valve clack 30, namely, the exhaust hole 23 is opened, and the exhaust valve 100 rapidly discharges air led out by the initial water flow of the pipeline system through the exhaust hole 23;

with the continuous discharge of air, the floating height of the floating ball assembly 50 is continuously increased, and when the floating ball assembly 50 floats up to the sealing exhaust hole 23, the guide rod 52 in the floating ball assembly 50 is locked by the locking mechanism 70, so that the self-locking process of the exhaust valve 100 is realized.

(2) When the pipeline system is in a normal water-through state: at this time, the pipeline system normally transports water flow, and the air remaining in the pipeline system is continuously separated out through the first micro exhaust valve 60, so that excessive air is prevented from being accumulated in the pipeline system, and the reduction of the transportation capacity of the pipeline system is avoided.

(3) When the pipe system is in a water cut-off or valve closing state: at this time, negative pressure is generated in the pipeline system, the valve clack 30 is kept fixed with the floating ball assembly 50 under the locking action of the locking mechanism 70, the negative pressure adsorption valve clack 30 in the system moves towards the direction of the supporting piece 11 which is close to the valve clack, the air suction hole 21 on the valve clack 30 is opened, and the air needing to be filled in the pipeline system is quickly supplemented by the air discharge valve 100, so that the negative pressure of the pipeline system is quickly eliminated.

(4) When the pipeline system is in a state of converting negative pressure into positive pressure: the exhaust valve 100 is used for rapidly supplementing air to be filled into the pipeline system by opening the air suction hole 21, the pipeline system is rapidly changed from a negative pressure state to a positive pressure state, at the moment, the valve clack 30 is reset under the elastic action of the first reset piece 112 and seals the air suction hole 21 formed in the main valve cover 20, part of air can be trapped in the pipeline system after the valve clack 30 closes the air suction hole 21, the part of air remains in the pipeline system to play a role of an elastomer, and the impact of a pump water hammer, a valve closing water hammer, a water hammer closing up and the like on the pipeline system in the pipeline system is reduced, so that the pipeline system is protected.

(5) When the pipeline system is in a full line water cut-off checking state: the pipeline system is in a negative pressure state due to the full line water cut-off check, and the water level in the pipeline system is continuously reduced; since the full line water cut-off check lasts for a relatively long time, the water level stored in the water level control box 71 in the air outlet valve 100 is continuously lowered, the locking mechanism 70 releases the locking effect on the float ball assembly 50, and at this time, the air outlet 23 formed on the valve flap 30 is opened, and the air required to be filled due to the full line water cut-off check is supplemented by the pipe system through the air outlet 23.

It will be appreciated that for convenience of description, the fluid transported within the vent valve 100 is exemplified by water flow, and in practical engineering applications, the piping system to which the vent valve 100 is applied is not limited to be capable of transporting only the water flow mentioned in the above embodiments. In other embodiments, the piping system used by the exhaust valve 100 may also be used for transporting other fluid media such as petroleum and hydraulic oil, that is, the exhaust valve 100 may also be used for exhausting air from the fluid media such as petroleum and hydraulic oil.

Referring to fig. 6, fig. 6 is a schematic diagram illustrating a structure of an exhaust valve 100a according to a second embodiment of the present invention. The exhaust valve 100a according to the second embodiment of the present invention also includes a main valve body 10a, a main valve cover 20a, a valve flap 30a, a valve cover 40a, a float ball assembly 50a, and a first micro exhaust valve 60a, and the structures and the connection relationships of the main valve body 10a, the main valve cover 20a, the valve flap 30a, the valve cover 40a, the float ball assembly 50a, and the first micro exhaust valve 60a in the exhaust valve 100 according to the second embodiment of the present invention are the same as those of the main valve body 10, the main valve cover 20, the valve flap 30, the valve cover 40, the float ball assembly 50, and the first micro exhaust valve 60 in the exhaust valve 100 according to the first embodiment of the present invention, and are not described herein.

The air outlet valve 100a also includes a locking mechanism 70a for locking the working position of the floating ball assembly 50a, wherein the locking mechanism 70a includes a water level control box 71a, a second micro air outlet valve 72a and a locking assembly 73a, and the functions and principles of the water level control box 71a and the second micro air outlet valve 72a are the same as those of the water level control box 71 and the second micro air outlet valve 72 in the first embodiment of the present invention, and are not described herein.

In this embodiment, the cover plate 712a is provided with a support shaft 7121a, and the support shaft 7121a extends into the chamber inside the housing 711a, so that the chamber inside the housing 711a forms a ring structure. A through hole 7122a is formed in the support shaft 7121a at a substantially center thereof, the through hole 7122a penetrates through both end surfaces of the support shaft 7121a, a central axis of the through hole 7122a substantially coincides with a central axis of the support shaft 7121a, and the through hole 7122a is used for the guide rod 52 to pass through. The supporting shaft 7121a is further provided with a receiving space for receiving a portion of the locking assembly 73 a.

Referring to fig. 7 and 8, fig. 8 is an enlarged view of D in the exhaust valve 100a shown in fig. 6, fig. 8 is an enlarged view of E in the exhaust valve 100a shown in fig. 7, and the locking assembly 73a includes a transmission member 732a, a locking member 734a, a second restoring member 735a and a collar 738. The transmission member 732a is disposed inside the housing 711a, and the transmission member 732a is hollow inside, and the transmission member 732a can be lifted and lowered along with the lifting of the water level inside the housing 711 a. The transmission member 732a is substantially annular, a tapered hole 7371 is formed in a substantially center of the transmission member 732a, the transmission member 732a is fitted over the support shaft 7121a inside the housing 711a through the tapered hole 7371, and the tapered hole 7371 is continuously contracted in a direction toward the main valve body 10 a.

In the present embodiment, the transmission 732a is a floating body provided in the water level control tank 71a and capable of moving up and down with the water level.

When the transmission member 732 adopts the floating body, the floating body is directly driven to lift by the liquid level in the water level control box 71, and the floating body directly feeds back the liquid level in the water level control box 71.

The locking piece 734a is accommodated in an accommodating space formed by the support shaft 7121a, and the locking piece 734a can move in a telescopic manner in the accommodating space; the locking piece 734a is inserted through the collar 738, and one end of the locking piece 734a can be driven by the driving piece 732a to extend into the through hole 7122a formed in the support shaft 7121 a.

The collar 738 is sleeved with the locking piece 734a and fixed to the case body 711a, and a sealing piece 739 is arranged between the collar 738 and the locking piece 734a, so that water flow in the case body 711a is isolated, and water flow is prevented from entering a through hole 7122a formed in the support shaft 7121a through a gap between the collar 738 and the locking piece 734a, so that normal operation of the guide rod 52 is disturbed.

The second restoring member 735a has one end abutting against the housing 711a and the other end abutting against the locking member 734, and the compressive deformation of the second restoring member 735a can provide the locking member 734 with a movement tendency away from the supporting shaft 7121 a.

The principle of locking mechanism 70a to lock ball assembly 50a is briefly described as follows:

When water flow is continuously injected into the main valve body 10a, that is, the floating ball assembly 50a continuously floats along with the water level, the water flow in the main valve body 10a enters the water level control box 71a along the control valve 714a and the drain pipeline 713a under the drive of the water pressure, the water flow in the water level control box 71a continuously rises to enable the transmission member 732a to continuously rise, the conical hole 7371 formed in the center of the transmission member 732a enables the radial dimension of the position of the locking member 734a to continuously increase in the rising process of the inner wall of the transmission member 732a, and the increase in the radial dimension of the transmission member 732a can push the locking member 734a to have the movement trend of the through hole 7122a extending into the supporting shaft 7121a, at this time, the movement trend of the locking member 734a extending out into the through hole 7122a is blocked by the guide rod 52 because the floating ball assembly 50a is not completely floated, that is the guide rod 52 abuts against one end of the locking member 734 a; when the water level in the main valve body 10a is continuously raised, the guide rod 52 is also continuously raised, and when the guide rod 52 moves to a proper height, the fixing groove 521 on the guide rod 52 is aligned with the locking piece 734a, the locking piece 734a is embedded into the fixing groove 521 on the guide rod 52, and at the moment, the guide rod 52 and the locking piece 734a are embedded and fixed, so that the locking process of the locking mechanism 70a on the floating ball assembly 50a is realized;

When the water level in the main valve body 10a drops, the water level stored in the water level control box 71a continuously drops, the transmission member 732a drops along with the drop of the water level, the radial dimension of the transmission member 732a corresponding to the position of the locking member 734a continuously increases, the transmission member 732a gradually releases the abutting action on the locking member 734a, and the locking member 734a is reset under the elastic action of the second reset member 735a, so as to complete the unlocking process of the locking mechanism 70a on the floating ball assembly 50 a.

The operation principle of the exhaust valve 100a in the different transportation states of the pipeline system is the same as that of the exhaust valve 100 in the first embodiment in the different transportation states of the pipeline system, and will not be described herein.

The invention also provides a pipeline system (not shown) using the exhaust valve, and the exhaust hole can be automatically locked and unlocked by opening and closing the exhaust hole due to the exhaust valve, so that the degree of automation is improved, and the reliability, the stability and the stability of the pipeline system are improved.

The exhaust valve provided by the invention can automatically realize the opening and closing of the exhaust hole 23 by arranging the locking mechanism, has high degree of automation and reduces manual operation; the pipeline system using the exhaust valve has relatively high stability and reliability.

It will be appreciated by persons skilled in the art that the above embodiments have been provided for the purpose of illustrating the invention and are not to be construed as limiting the invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims

1. The utility model provides an exhaust valve, includes main valve body, main valve gap, valve bonnet, valve clack, floater subassembly and first trace exhaust valve, the main valve cover lid is located the main valve body and bear the valve bonnet, the suction hole has been seted up on the main valve lid, the valve clack with separation or contact control between the main valve cover open or close of suction hole, its characterized in that, still set up the exhaust hole on the main valve lid, floater subassembly with separation or contact control between the main valve cover open or close of exhaust hole, the exhaust valve still includes locking mechanical system, locking mechanical system include locking component and connect in locking component's water level control box, locking component can be in under the hydraulic pressure effect of water level control box imbeds in the floater subassembly in order to lock floater subassembly the working position when sealed the exhaust hole.

2. The vent valve of claim 1, wherein the locking assembly further comprises a locking member and a transmission member connected to the locking member, wherein the transmission member is acted on by water currents of different heights in the water level control box, and the locking member moves under the driving of the transmission member to lock the working position of the floating ball assembly when the vent hole is sealed.

3. The vent valve of claim 2, wherein the locking assembly further comprises a second return member, the second return member resiliently acting on the locking member, the locking member telescopically moving under the action of water at different heights within the water level control tank and the resilient action of the second return member to lock the float assembly in an operative position when sealing the vent hole.

4. The exhaust valve according to claim 2, wherein the transmission member is a pressing plate, the number of the pressing plates is two, a membrane is clamped between the two pressing plates, the locking assembly further comprises a fixing frame arranged on the main valve cover, a chamber is formed in the fixing frame, the locking member, the pressing plate, the membrane and the second resetting member are all contained in the chamber, two ends of the membrane are fixed on the inner wall of the fixing frame and isolate the chamber into a first chamber and a second chamber, and the pressing plate contained in the first chamber is acted by water pressure of water flows with different heights in the water level control box and drives the locking member to move.

5. The vent valve of claim 4 wherein the locking assembly further comprises a hose having one end in communication with the water level control tank and another end in communication with the first chamber, the water pressure within the water level control tank being transferred through the hose to a pressure plate located within the first chamber.

6. The exhaust valve according to claim 2, wherein the transmission member is a floating body, the water level control tank comprises a tank body communicated with the main valve body and a cover plate covered on the tank body, the floating body is arranged in the tank body, a supporting shaft extending into the tank body is arranged on the cover plate, the locking member and the second resetting member are embedded in the supporting shaft, a through hole for the floating ball assembly to extend into is formed in the supporting shaft, a conical hole is formed in the floating body, the supporting shaft is sleeved by the floating body through the conical hole, one end, close to the cover plate, of the conical hole gradually contracts towards the end far away from the cover plate, and the locking member is embedded in the floating ball assembly under the abutting of the inner wall of the floating body so as to lock the working position of the floating ball assembly when the exhaust hole is sealed.

7. The vent valve of claim 6 wherein the locking assembly further comprises a collar that is received over the locking member and fixedly coupled to the housing.

8. The vent valve of claim 1 wherein a drain line is further disposed between the water level control box and the main valve body, the drain line having a control valve disposed thereon for controlling the flow of fluid within the drain line.

9. The exhaust valve of claim 1, wherein the valve flap is provided with a first through hole, the first through hole is communicated with the exhaust hole, and an inner diameter of the first through hole is larger than an outer diameter of the floating ball assembly.

10. The exhaust valve of claim 9, wherein said suction orifice is annular, said valve flap matching and sealing said annular suction orifice.