CN111237535B - Multifunctional one-way valve capable of being actively opened and closed and function adjusting method thereof - Google Patents

Multifunctional one-way valve capable of being actively opened and closed and function adjusting method thereof Download PDF

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Publication number
CN111237535B
CN111237535B CN202010225301.XA CN202010225301A CN111237535B CN 111237535 B CN111237535 B CN 111237535B CN 202010225301 A CN202010225301 A CN 202010225301A CN 111237535 B CN111237535 B CN 111237535B
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China
Prior art keywords
valve
function
sleeve
valve core
stroke
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CN202010225301.XA
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Chinese (zh)
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CN111237535A (en
Inventor
张景胜
胡英
孙丰迎
解瑞江
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China First Heavy Industries Co Ltd
CFHI Dalian Engineering and Technology Co Ltd
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China First Heavy Industries Co Ltd
CFHI Dalian Engineering and Technology Co Ltd
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Priority to CN202010225301.XA priority Critical patent/CN111237535B/en
Publication of CN111237535A publication Critical patent/CN111237535A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/60—Handles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0008—Mechanical means
    • F16K37/0016—Mechanical means having a graduated scale

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

The invention provides a multifunctional one-way valve capable of being actively opened and closed and a function adjusting method thereof. The invention comprises the following steps: valve gap, valve body, case, valve pocket, stop collar, actuating mechanism, regulation pole, case lift bar, half cutting ferrule, anti-rotating pin and spring, adjust pole one end and link to each other with actuating mechanism after passing the valve gap, and the other end is installed in half cutting ferrule, and case lift bar one end is installed in half cutting ferrule, and the other end is fixed in the case bottom, the spring sets up inside the case, and it cup joints on the case lift bar, based on the regulation pole stroke and the case maximum stroke, the stroke of case lift bar piston in half cutting ferrule, the relation between the maximum stroke of valve rod, through adjusting actuating mechanism with this multi-functional valve to be totally cut-off function, establish ties one-way throttle function, pressure adjustable check valve or relief valve function, parallelly connected one-way throttle valve function and open the valve function entirely. The invention has simple structure and low cost, can be suitable for various occasions and has wide application.

Description

Multifunctional one-way valve capable of being actively opened and closed and function adjusting method thereof
Technical Field
The invention relates to the technical field of fluid transmission, in particular to a multifunctional one-way valve capable of being actively opened and closed and a function adjusting method thereof.
Background
The valve is a pipeline accessory for opening and closing a pipeline, controlling the flow direction, adjusting and controlling parameters (temperature, pressure and flow rate) of a conveying medium. One-way valves, also known as check valves or non-return valves, are used in hydraulic systems to prevent reverse flow of oil flow or in pneumatic systems to prevent reverse flow of compressed air. A throttle valve is a valve that controls the flow of a fluid by changing the throttle cross section or throttle length. The stop valve relies on valve rod pressure to make case sealing surface and valve seat sealing surface closely laminate, prevents the medium circulation. The safety valve is a special valve which is in a normally closed state under the action of spring force and prevents the medium pressure in the pipeline or the equipment from exceeding a specified value by discharging the medium to the outside of the system when the medium pressure in the equipment or the pipeline rises to exceed the specified value. The valves are all common valves in the prior art, and each valve has only unique characteristics and is not universal.
Disclosure of Invention
According to the technical problems set forth above, a switchable multifunctional one-way valve and a function adjusting method thereof are provided. The invention adopts the following technical means:
a multi-functional, actively switchable one-way valve comprising: the valve cover is detachably fixed on the valve body, the valve sleeve is arranged in the valve body, the contact part of the lower part of the valve sleeve and the valve core is equal to a valve seat, the valve core is arranged at the lower part in the valve sleeve, the limiting sleeve is arranged at the upper part in the valve sleeve, one end of the adjusting rod penetrates through the valve cover and then is connected with the actuating mechanism, the other end of the adjusting rod is arranged in the half cutting sleeve, the piston end of the valve core lifting rod is arranged in the half cutting sleeve, the other end of the valve core lifting rod is fixed at the bottom of the valve core, the spring is arranged in the valve core and sleeved on the valve core lifting rod, the upper end of the spring is propped against the bottom of the half cutting sleeve, and the outer wall of the half cutting sleeve is attached to the inner wall of the limiting sleeve;
based on the relation between the stroke of the adjusting rod and the maximum stroke of the valve core, the stroke of the valve core lifting rod piston in the half clamping sleeve and the maximum stroke of the valve rod, the adjusting executing mechanism drives the adjusting rod to adjust the multifunctional valve into a complete cut-off function, a serial one-way throttling function, a pressure adjustable one-way valve or safety valve function, a parallel one-way throttling valve function and a complete opening valve function.
Further, the actuating mechanism is a linear motion mechanism and comprises electric, hydraulic, pneumatic and mechanical transmission.
Further, when the actuating mechanism is manual, the actuating mechanism comprises a hand wheel, a first shaft sleeve and a second shaft sleeve, the hand wheel and the first shaft sleeve are connected into a whole through keys, a clamping ring is arranged between the hand wheel and the first shaft sleeve, the second shaft sleeve is sleeved outside the first shaft sleeve, a bearing is arranged between the second shaft sleeve and the second shaft sleeve, one end of the adjusting rod is installed in the first shaft sleeve through a transmission thread, and the actuating mechanism is combined with the valve cover through the second shaft sleeve.
Further, one end of the adjusting rod, which enters the valve body, is provided with a clamping groove, the clamping groove is clamped with the half clamping sleeve, an oil discharge gap is reserved between the two half clamping sleeves, the piston end of the valve core lifting rod is arranged inside the half clamping sleeve, the other end of the valve core lifting rod is screwed into the bottom of the valve core through threaded connection, and the valve core is provided with an oil discharge hole for connecting the cavity B with the inside of the valve core.
Further, one end of the anti-rotation pin is connected to the adjusting rod in a threaded manner, the other end of the anti-rotation pin extends into the upper long hole and the lower long hole of the side wall of the second sleeve, the outer wall of the adjusting rod is in sliding fit with the inner wall of the long hole, mutual rotation is prevented, scales are marked on the outer walls of the upper long hole and the lower long hole of the side wall of the second sleeve, and the state of the valve is indicated according to the position of the anti-rotation pin.
Further, the maximum opening amount of the valve port is limited by the limit sleeve, and when the valve port is used as a one-way valve or a safety valve, the maximum opening amount of the valve port is unchanged when the opening pressure is regulated.
The multifunctional valve is regulated into a complete cut-off function, a serial one-way throttling function, a pressure-adjustable one-way valve or a safety valve function, a parallel one-way throttling valve function and a complete opening valve function through the regulating executing mechanism. The valve opening pressure is adjustable, and the weakening of the elasticity of the spring can be compensated or the optimal opening pressure can be set by increasing the pretightening force. The invention can be used as a safety valve for the pressure limiting function, and can be manually cut off and completely closed when equipment is overhauled, so that the oil stored on the non-overhauling side is not leaked; and before equipment overhaul, a valve is manually opened to realize oil drainage.
Based on the reasons, the multifunctional check valve and the function adjusting method thereof can be widely popularized in the field of multifunctional check valves and function adjusting methods thereof.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
Fig. 1 is a state diagram of the present invention in the off-function.
Fig. 2 is a state diagram of the present invention in a series one-way throttle function.
Fig. 3 is a state diagram of the present invention in the function of a pressure-adjustable check valve or relief valve.
Fig. 4 is a state diagram of the present invention in the parallel one-way throttle function.
Fig. 5 is a state diagram of the present invention in the fully open valve function.
In the figure: 1. an adjusting rod; 2. a valve core lifting rod; 3. a spring; 4. a valve core; 5. a valve sleeve; 6. a valve cover; 7. a valve body; 8. a limit sleeve; 9. an actuator; 9.1, a hand wheel; 9.2, a first shaft sleeve; 9.3, a second sleeve; 9.4, snap ring; 9.5, keys; 9.6, a bearing; 10. an anti-rotation pin; 11. a half cutting sleeve; 12. a screw; 13. a gasket; 14. a first seal ring; 15. a second seal ring; 16. a third seal ring; 17. and a fourth sealing ring.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. 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.
As shown in fig. 1, an embodiment of the present invention discloses a multifunctional one-way valve capable of being actively opened and closed, comprising: the valve cover 6, the valve body 7, the valve core 4, the valve sleeve 5, the limiting sleeve 8, the actuating mechanism 9, the adjusting rod 1, the valve core lifting rod 2, the half clamping sleeve 11, the anti-rotation pin 10 and the spring 3, wherein the valve cover 6 is detachably fixed on the valve body 7, and in the embodiment, the valve cover is installed through the screw 12, and the gasket 13 is arranged between the valve cover and the valve cover. The valve sleeve 6 is arranged in the valve body 7, the contact part of the lower part of the valve sleeve 6 and the valve core 4 is equivalent to a valve seat, the valve core 4 is arranged at the lower part in the valve sleeve 5, the limiting sleeve 8 is arranged at the upper part in the valve sleeve 5, one end of the adjusting rod 1 passes through the valve cover 6 and then is connected with the actuating mechanism 9, the other end of the adjusting rod is arranged in the half cutting sleeve 11, the piston end of the valve core lifting rod 2 is arranged in the half cutting sleeve 11, the other end of the valve core lifting rod 2 is fixed at the bottom of the valve core 4, the spring 3 is arranged in the valve core 4 and is sleeved on the valve core lifting rod 2, the upper end of the spring is propped against the bottom of the half cutting sleeve 11, the outer wall of the half cutting sleeve is attached to the inner wall of the limiting sleeve, and the half cutting sleeve, namely the whole cutting sleeve is cut into two halves along the axis;
based on the relation between the stroke of the adjusting rod and the maximum stroke of the valve core, the stroke of the valve core lifting rod piston in the half cutting sleeve and the maximum stroke of the valve rod, the position of the adjusting rod is changed by adjusting the hand wheel of the actuating mechanism, the position of the half cutting sleeve is changed accordingly, so that the position of the valve core lifting rod is changed, when the valve core is opened, the spring is compressed, and the multifunctional valve is realized along with the stroke change: the valve comprises a complete stop function, a serial one-way throttling function, a pressure-adjustable one-way valve or safety valve function, a parallel one-way throttling valve function and a complete opening valve function.
The actuating mechanism comprises a hand wheel 9.1, a first shaft sleeve 9.2 and a second shaft sleeve 9.3, wherein the hand wheel 9.1 and the first shaft sleeve 9.2 are connected into a whole through a key 9.5, a clamping ring 9.4 is arranged between the hand wheel 9.1 and the first shaft sleeve, the second shaft sleeve 9.3 is sleeved outside the first shaft sleeve 9.2, a bearing 9.6 is arranged between the second shaft sleeve 9.3, one end of the adjusting rod 1 is installed in the first shaft sleeve 9.2 through transmission threads, and the actuating mechanism is combined with a valve cover through the second shaft sleeve. The adjusting executing mechanism comprises but is not limited to the above forms, and is matched with various linear motion mechanisms such as electric, hydraulic, pneumatic, mechanical transmission and the like, and belongs to the protection scope of the patent.
One end of the adjusting rod, which enters the valve body, is provided with a clamping groove, the clamping groove is clamped with the half clamping sleeve 11, an oil discharge gap is reserved between the two half clamping sleeves, the piston end of the valve core lifting rod is arranged inside the half clamping sleeve, the other end of the valve core lifting rod is screwed into the bottom of the valve core through threaded connection, the valve core 4 is matched with the valve sleeve valve seat 5 and can slide relatively, the limiting sleeve 8 is matched with the valve sleeve valve seat 5, and the valve core is provided with an oil discharge hole for connecting the cavity B with the interior of the valve core.
One end of the anti-rotation pin 10 is connected to the adjusting rod 1 in a threaded manner, the other end of the anti-rotation pin extends into the upper long hole and the lower long hole on the side wall of the second sleeve 9.3, the outer wall of the adjusting rod 1 is in sliding fit with the inner wall of the long hole, mutual rotation is prevented, scales are marked on the outer walls of the upper long hole and the lower long hole on the side wall of the second sleeve 9.3, and the valve state is indicated according to the position of the anti-rotation pin 10.
The end face of the adjusting rod 1 entering the valve body is provided with a bulge, so that stable contact with the end face of the valve core lifting rod 2 is ensured. The maximum opening of the valve port is limited by the limit sleeve 8, and is unchanged when the valve port is used as a check valve or a safety valve.
A first sealing ring 14 is arranged between the adjusting rod 1 and the valve cover 6, a sealing structure is arranged between the valve body 7 and the valve sleeve 5, and the valve comprises a second sealing ring 15 between the valve sleeve 5 and the valve cover 6, a third sealing ring 16 between the side wall of the valve sleeve 5 and the valve body 7, and a fourth sealing ring 17 between the valve sleeve base and the valve body.
Valve core maximum stroke S0, valve core stroke S, valve rod stroke H, valve rod maximum stroke H0, valve core lift rod piston' S stroke L0 in half cutting ferrule, wherein: h0 =s0+l0, the specific function adjustment method includes the steps of:
as shown in fig. 1, the adjustment to the complete cut-off function is specifically: the adjusting rod 1 is set to a stroke h=0, i.e. the valve rod is at the lowest position in the figure. The hand wheel 9.1 of the adjusting actuator 9 drives the valve core 4 to move downwards after the adjusting rod 1 moves downwards until the end face contacts with the valve core adjusting rod 2, the valve core 4 is pressed on the valve seat at the lower end of the valve sleeve 5, and the valve is closed and is in a completely cut-off state.
As shown in fig. 2, the serial unidirectional throttling function is specifically: the adjusting rod 1 stroke H is smaller than the maximum stroke S0 of the valve element 4, i.e. h=s < S0. The positions of the valve element 4, the valve element lift lever 2, and the adjustment lever 1 in fig. 1 are used as references. The adjusting hand wheel 9.1, the adjusting lever 1 is moved upwards H from the cut-off function position. When the A, B port pressure difference is larger than the set spring force, the valve core 4 is opened upwards, the spring 3 is compressed, the valve is opened, the opening degree is equal to the valve core stroke S, and the throttling function is realized. When the A, B port pressure difference is smaller than the set spring force, the valve core 4 is pressed on the valve seat at the lower end of the valve sleeve 5, and the valve is closed and is in a completely cut-off state. Thereby realizing a serial unidirectional throttling function.
As shown in fig. 3, the check valve or the safety valve with adjustable pressure has the functions of pressure adjustment and pressure limitation, and realizes the set pressure between the maximum pressure and the minimum pressure. The method comprises the following steps: the stroke H of the adjusting rod 1 is larger than the maximum stroke S0 of the valve core 4 and smaller than L0, namely S0< H < L0. The positions of the valve element 4, the valve element lift lever 2, and the adjustment lever 1 in fig. 1 are used as references. The regulating hand wheel 9.1, the regulating rod 1 moves upwards from the cut-off function position by H, when the A, B port pressure difference is smaller than the set spring force, the valve core 4 is pressed on the lower end valve seat of the valve seat 5, and the valve is closed and is in a complete cut-off state. When the A, B port pressure difference is larger than the set spring force, after the valve core 4 is opened upwards, the spring 3 is compressed, the valve is opened, the maximum opening degree is limited by the limiting sleeve to be the maximum stroke S0 of the valve core, and the one-way valve function is realized. The valve can also be used as a safety valve because the opening pressure is adjustable. The regulating hand wheel 9.1 realizes the function of a minimum opening pressure one-way valve or a safety valve when the regulating rod 1 moves upwards by L0 from the cut-off function position. When the regulating lever 1 is moved upward S0 from the cut-off function position, the maximum opening pressure check valve or the relief valve function is realized.
As shown in fig. 4, the function of the parallel check throttle valve is specifically: the stroke H of the adjusting rod 1 is larger than L0 and smaller than the maximum stroke H0, namely L0< H < H0. The positions of the valve element 4, the valve element lift lever 2, and the adjustment lever 1 in fig. 1 are used as references. The regulating hand wheel 9.1, the regulating rod 1 moves upwards from the cut-off function position by H, and the valve core lifting rod 2 and the valve core move upwards by H-L0. The valve core 4 opens H-L0, and the throttling function is realized at this time. When the A, B port pressure difference is smaller than the set spring force, the valve core 4 keeps the opening degree of the throttling function unchanged. When the A, B port pressure difference is larger than the set spring force, after the valve core 4 continues to be opened upwards, the spring 3 is compressed, the valve is completely opened, the opening degree is equal to the maximum stroke S0 of the valve core, and the function of the one-way valve is realized. Fig. 2, 3 and 4 each show two states of a function.
As shown in fig. 5, the function of adjusting to the fully open valve is specifically: adjust rod 1 travel h=h0. The adjusting hand wheel 9.1, the adjusting rod 1 moves upwards from the cut-off function position by H0, the valve core lifting rod 2 moves upwards by H0-l0=s0, and the valve core 4 is driven to move upwards by S0. At this time, the valve is completely opened, and the function of manually completely opening the valve is realized.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (5)

1. A multifunctional one-way valve capable of being actively opened and closed, comprising: the valve cover is detachably fixed on the valve body, the valve sleeve is arranged in the valve body, the contact part of the lower part of the valve sleeve and the valve core is equal to a valve seat, the valve core is arranged at the lower part in the valve sleeve, the limiting sleeve is arranged at the upper part in the valve sleeve, one end of the adjusting rod penetrates through the valve cover and then is connected with the actuating mechanism, the other end of the adjusting rod is arranged in the half cutting sleeve, the piston end of the valve core lifting rod is arranged in the half cutting sleeve, the other end of the valve core lifting rod is fixed at the bottom of the valve core, the spring is arranged in the valve core and sleeved on the valve core lifting rod, the upper end of the spring is propped against the bottom of the half cutting sleeve, and the outer wall of the half cutting sleeve is attached to the inner wall of the limiting sleeve;
based on the relation between the stroke of the regulating rod and the maximum stroke of the valve core, the stroke of the valve core lifting rod piston in the half-clamping sleeve and the maximum stroke of the valve rod, the regulating executing mechanism drives the regulating rod to regulate the multifunctional one-way valve into a complete cut-off function, a serial one-way throttling function, a pressure-adjustable one-way valve or safety valve function, a parallel one-way throttling valve function and a complete opening valve function;
the actuating mechanism is a linear motion mechanism and comprises electric, hydraulic, pneumatic and mechanical transmission;
one end of the adjusting rod, which enters the valve body, is provided with a clamping groove, the clamping groove is clamped with the half clamping sleeve, an oil discharge gap is reserved between the two half clamping sleeves, the piston end of the valve core lifting rod is arranged inside the half clamping sleeve, and the other end of the valve core lifting rod is screwed into the bottom of the valve core through threaded connection.
2. The multifunctional one-way valve capable of being actively opened and closed according to claim 1, wherein the actuating mechanism comprises a hand wheel, a first shaft sleeve and a second shaft sleeve when being manual, the hand wheel and the first shaft sleeve are connected into a whole through keys, a clamping ring is arranged between the hand wheel and the first shaft sleeve, the second shaft sleeve is sleeved outside the first shaft sleeve, a bearing is arranged between the second shaft sleeve and the first shaft sleeve, one end of the adjusting rod is installed in the first shaft sleeve through a transmission thread, and the actuating mechanism is connected with the valve cover through the second shaft sleeve.
3. The multifunctional one-way valve capable of being actively opened and closed according to claim 1, wherein one end of the anti-rotation pin is connected to the adjusting rod in a threaded manner, the other end of the anti-rotation pin extends into the upper long hole and the lower long hole of the side wall of the second sleeve, the outer wall of the adjusting rod is in sliding fit with the inner wall of the long hole to prevent mutual rotation, scales are marked on the outer walls of the upper long hole and the lower long hole of the side wall of the second sleeve, and the valve state is indicated according to the position of the anti-rotation pin.
4. The actively switchable multifunctional check valve of claim 1 wherein the maximum opening of the valve port is defined by a stop collar, and when functioning as a check valve or safety valve, the maximum opening of the valve port is unchanged when the opening pressure is adjusted.
5. The function adjusting method of the actively switchable multifunctional check valve according to any one of claims 1 to 4, wherein a maximum valve spool stroke S0, a valve spool stroke S, a valve stem stroke H, a maximum valve stem stroke H0, and a stroke L0 of a valve spool lift rod piston in a half ferrule, wherein: h0 =s0+l0, the specific function adjustment method includes the steps of:
the adjustment to the complete cut-off function is specifically: the regulating hand wheel enables H=0, namely the valve rod is at the lowest position, after the regulating rod moves downwards until the end face contacts with the valve core regulating rod, the valve core is driven to move downwards continuously, the valve core is pressed on the valve seat at the lower end, and the valve is closed and is in a completely cut-off state;
the serial unidirectional throttling function is specifically as follows: the regulating hand wheel enables H to be less than S0, when the A, B port pressure difference is greater than the set spring force, the valve core is opened upwards, the spring is compressed, the valve is opened, the opening degree is equal to the valve core stroke S, and the throttling function is realized; when the pressure difference of the A, B port is smaller than the set spring force, the valve core is pressed on the valve seat at the lower end, and the valve is closed and is in a complete cut-off state;
the check valve or the safety valve with adjustable pressure has the following functions: the regulating hand wheel enables S0 to be less than H to be less than L0, when the A, B port pressure difference is greater than the set spring force, after the valve core is opened upwards, the spring is compressed, the valve is opened, the maximum opening degree is limited by the limiting sleeve to be the maximum stroke S0 of the valve core, and the function of the one-way valve is realized; when the pressure difference of the A, B port is smaller than the set spring force, the valve core is pressed on the valve seat at the lower end, and the valve is closed and is in a complete cut-off state; the hand wheel is adjusted to enable H=L0, so that the function of a minimum opening pressure one-way valve or a safety valve is realized; the hand wheel is adjusted to enable H=S0, so that the maximum opening pressure one-way valve or the safety valve function is realized;
the function of the parallel one-way throttle valve is specifically as follows: the regulating hand wheel enables L0 to be smaller than H0, the valve core lifting rod and the valve core move upwards by H-L0, and the valve core opens H-L0, so that a throttling function is realized; when the A, B port pressure difference is smaller than the set spring force, the valve core keeps the opening degree of the throttling function unchanged; when the A, B port pressure difference is larger than the set spring force, after the valve core is continuously opened upwards, the spring is compressed, the valve is completely opened, the opening degree is equal to the maximum stroke S0 of the valve core, and the one-way valve function is realized;
the function of adjusting the fully opened valve is specifically as follows: the adjusting hand wheel enables H=H20, namely the adjusting hand wheel, the adjusting rod moves upwards from the cut-off function position by H0, the valve core lifting rod moves upwards by H0-L0=S0, and accordingly the valve core is driven to move upwards by S0, and at the moment, the valve is completely opened, and the manual valve completely opening function is achieved.
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CN116972180B (en) * 2023-08-02 2024-05-24 江苏博特威流体科技有限公司 Anti-theft portable valve opening and closing device

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CN203979533U (en) * 2014-07-23 2014-12-03 天津百利展发集团有限公司 A kind of throttle non-return valve

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US20050145809A1 (en) * 2004-01-05 2005-07-07 Wen-Tsong Lee Multifunctional valve device
CN102588635A (en) * 2011-07-21 2012-07-18 天津市国威给排水设备制造有限公司 Return stop valve
CN203258122U (en) * 2013-05-31 2013-10-30 宁波永享铜管道有限公司 Non-return stop valve
CN104896155A (en) * 2015-06-09 2015-09-09 许炎章 Stop check valve for industrial refrigeration
CN205155182U (en) * 2015-11-27 2016-04-13 安徽杰克耐腐泵阀有限公司 By dual -purpose valve of non return
CN211820975U (en) * 2020-03-26 2020-10-30 一重集团大连工程技术有限公司 Multifunctional one-way valve capable of being actively opened and closed

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CN203979533U (en) * 2014-07-23 2014-12-03 天津百利展发集团有限公司 A kind of throttle non-return valve

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