CN213575741U

CN213575741U - Axial-flow type non-leakage check valve

Info

Publication number: CN213575741U
Application number: CN202022397511.5U
Authority: CN
Inventors: 邱晓来; 曹小慧; 姚宝玲; 邹碧繁; 孙雪; 邵爱芬
Original assignee: Chaoda Valve Group Lishui Co ltd; Chaoda Valve Group Co ltd
Current assignee: Chaoda Valve Group Lishui Co ltd; Chaoda Valve Group Co ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-06-29
Anticipated expiration: 2030-10-26

Abstract

The utility model relates to an axial-flow type does not have outer check valve that leaks, including valve body, valve clack and valve clack reset assembly, valve clack reset assembly includes uide bushing and compression spring, and the uide bushing is installed in the section of effluenting, and valve clack flow path axial is provided with back location axle towards the uide bushing, is the axial direction cooperation of sliding of relative runner between uide bushing and the back location axle, and the compression spring cover is located back location axle and is compressed between valve clack and uide bushing, and the opposite side of the relative valve clack of uide bushing is provided with the position circle, and the position circle periphery is fixed coordination with the inner wall. Adopt above-mentioned scheme, the utility model provides an axial-flow type does not have leak check valve that sealing performance is strong, no water hammer phenomenon, runner are unobstructed, the action is reliable, the stable performance.

Description

Axial-flow type non-leakage check valve

Technical Field

The utility model relates to a check valve field, concretely relates to axial-flow type does not have outer check valve that leaks.

Background

The check valve is a valve with a circular valve clack and acts by self weight and medium pressure to block the medium from flowing backwards. It belongs to the automatic valve category, also called check valve, reflux valve or isolation valve. The check valve can be automatically opened when the medium in the pipe is flowing in the forward direction, and can be automatically closed when the medium in the pipe is flowing in the reverse direction.

People will have higher requirements on the performance of the check valve, and the requirements are mainly reflected in the following aspects: A. the check valve is required to have no external leakage, and the medium is required to be leaked externally, so that the environment is polluted, and even serious accidents such as combustion, explosion, poisoning and the like can occur; B. the water hammer pressure of the check valve is required to be small, the water hammer is usually caused when the check valve is closed, and the damage of a valve and a pipeline system can be caused by the excessive water hammer pressure; C. the flow channel is smooth, the medium resistance is small, the medium resistance of the check valve is too large, the normal flow of the medium can be influenced, and the energy loss of a pipeline system can be caused. D. The check valve has reliable action and stable performance, can be reliably opened and closed according to the medium circulation condition of a pipeline system, and has stable action performance, and the conventional check valve is difficult to comprehensively meet the requirements.

Disclosure of Invention

Not enough to prior art exists, the utility model aims to provide an axial-flow type does not have outward leakage check valve that sealing performance is strong, no water hammer phenomenon, the runner is unobstructed, the action is reliable, the stable performance.

In order to achieve the above purpose, the utility model provides a following technical scheme: the valve comprises a valve body, a valve clack and a valve clack reset assembly, wherein a flow channel is arranged in the valve body, the flow channel is provided with an inflow section, a sealing opening and an outflow section which are axially arranged, the medium pressure of the inflow end is greater than the sum of the reset force of the reset assembly and the medium pressure of the outflow section, the valve clack is far away from the sealing opening, and the flow channel is opened; the medium pressure of influent stream end be less than or equal to the reset power that resets the subassembly and the medium pressure total sum of the section of effluenting, the valve clack resets to the sealing port, the runner cuts off its characterized in that: the valve clack reset assembly include uide bushing and compression spring, the uide bushing install in the section of effluenting, the valve clack be provided with the back location axle along runner axial direction uide bushing, uide bushing and back location axle between be relative runner axial direction and slide the cooperation, compression spring cover locate the back location axle and compress between valve clack and uide bushing, the opposite side of the relative valve clack of uide bushing be provided with the position circle, the position circle periphery be fixed coordination with the inner wall of the section of effluenting.

By adopting the technical scheme, the integral structure is adopted, parts such as the valve clack and the like are all installed in the valve body, when the check valve is connected with the pipeline together (the typical structure is that the valve body is connected with the pipeline in a butt welding way), the check valve has no outer leakage point, therefore, the check valve can better ensure no outer leakage of a medium, and is particularly suitable for harsh working conditions such as high temperature and high pressure, when the medium in the pipeline flows from the inflow section to the outflow section, under the action of medium pressure, the medium force overcomes the pretightening force of a spring behind the valve clack to open the valve clack, the medium flows through the check valve, when the axial flow type check valve clack is fully opened, the flow channel is smooth, the fluid resistance is small, the energy loss of the medium is small, meanwhile, the valve clack of the axial flow type check valve does not need to be opened greatly, the axial flow type check valve can rapidly close the check valve before the medium in the pipeline flows backwards at a high speed, so that the high-speed backflow of the medium is effectively prevented, the high-speed impact of the medium on the check valve is also avoided, the water hammer pressure of the check valve is effectively controlled, and the safety of the system is ensured.

The utility model discloses further set up to: the positioning ring periphery and the inner wall of the outflow section are in threaded fit, and the end parts of the inner wall of the outflow section and the positioning ring periphery in threaded fit, which are close to the inflow section, are provided with limiting steps which abut against the positioning ring.

Through adopting above-mentioned technical scheme, adopt screw-thread fit's mode to fix position circle and valve body, the dismouting is more simple and convenient, treats that the position circle offsets with spacing step, and accurate installation targets in place promptly.

The utility model discloses further set up to: the guide sleeve is a hollow component, the hollow part of the guide sleeve is used as an installation cavity, a rear bushing is arranged in the installation cavity, an installation hole is formed in the rear bushing along the axial direction of the flow channel, a spring seat which is abutted to the end part of the compression spring is fixed in the installation hole, and a rear guide hole which is matched with the rear positioning shaft in a sliding mode is formed in the spring seat along the axial direction of the flow channel.

Through adopting above-mentioned technical scheme, make the uide bushing cavity and set up back bush in hollow portion, make the structure more compact when improving the protection to the spring to integrate bush and spring holder, make the bush have compression spring simultaneously and with the back location axle function of sliding fit, make the structure further retrench.

The utility model discloses further set up to: the valve comprises a valve clack, a guide sleeve and a guide section, wherein a first guide cambered surface is arranged on the periphery of the valve clack and used for guiding a medium flowing from the inflow section to the outflow section to the outer side of the valve clack to the periphery of the guide sleeve, a second guide cambered surface is arranged on the periphery of the guide sleeve and has an outer diameter gradually reduced along the direction from the inflow section to the outflow section, and a third guide cambered surface is arranged on the inner wall of the outflow section, corresponding to the guide sleeve, and matched with the second guide cambered surface in shape.

Through adopting above-mentioned technical scheme, on the one hand, the medium that the section flowed to the section of effluenting that flows is advanced to the forward flowing (promptly advance the section of effluenting the medium) under the guide of first guide cambered surface, bypass the spring that is located between valve clack and uide bushing, the invariable passageway of specification that forms through second guide cambered surface and second guide cambered surface flows the runner from the section of effluenting, protect the spring from the forward, on the other hand, the medium that the section flowed to the section of effluenting (promptly advance the section of effluenting the medium) that flows disperses under the effect of second guide cambered surface, equally bypass the spring between valve clack and the uide bushing, act on the valve clack at last, protect the spring from the reversal, the combination forms the good protection of spring, be difficult to damage, thereby improve.

The utility model discloses further set up to: the rear bushing periphery and the chamber wall of installation cavity between be provided with a plurality of installation muscle along circumference equidistance, adjacent installation muscle between the space as the medium flow space, the uide bushing keep away from the tip of inflow section and seted up the through-hole with the installation cavity with the section UNICOM of effluenting along the flow path axial.

Through adopting above-mentioned technical scheme, add the through-hole, make the countercurrent medium who flows out the section can pass the space between through-hole and the installation muscle in proper order and act on the valve clack fast, help improving the reaction rate of non return, help the valve clack to close fast.

The utility model discloses further set up to: the uide bushing and position circle internal week between be provided with three back direction muscle along circumference equidistance, adjacent back direction muscle between the space as the medium flow space.

Through adopting above-mentioned technical scheme, the quantity of back direction muscle is selected threely, guarantees the installation reliability of uide bushing when guaranteeing medium flow.

The utility model discloses further set up to: the valve clack is provided with a front positioning shaft towards the front bushing along the axial direction of the flow channel, the front positioning shaft is in sliding fit with the front guiding hole, and the space between the adjacent front guiding ribs is used as a medium flowing space.

By adopting the technical scheme, the front positioning shaft is additionally arranged, so that the front part and the rear part of the valve clack are provided with guiding positioning, thereby ensuring the stable opening and closing of the valve clack,

the utility model discloses further set up to: the number of the front guide ribs is two, and the front guide ribs are symmetrically arranged on two sides of the front bushing.

By adopting the technical scheme, two front guide ribs are selected, so that the installation reliability of the front bushing is ensured while the medium flow is ensured.

The utility model discloses further set up to: the sealing opening is provided with a valve seat formed by overlaying a wear-resistant material.

By adopting the technical scheme, the valve seat formed by overlaying the wear-resistant material enables the sealing port to have better sealing performance, and hard alloy is generally adopted as the wear-resistant material.

The utility model discloses further set up to: and a lifting ring is fixedly arranged on the outer side of the valve body.

Through adopting above-mentioned technical scheme, add rings, make the check valve be convenient for hoist and mount.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a valve body according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line C of FIG. 2;

FIG. 4 is a cross-sectional view of a guide sleeve according to an embodiment of the present invention;

FIG. 5 is a view taken along line A of FIG. 4;

fig. 6 is a sectional view taken along line B of fig. 4.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-6, the utility model discloses an axial-flow type non-leakage check valve, including valve body 1, valve clack 2 and valve clack reset assembly, set up runner 11 in the valve body 1, runner 11 is provided with inflow section a, seal b and the section c of effluenting that axially arranges, and the medium pressure of inflow end is greater than reset assembly's reset force and the medium pressure sum of the section c of effluenting, and valve clack 2 keeps away from seal b, and runner 11 opens; the medium pressure of the inflow end is less than or equal to the sum of the reset force of the reset assembly and the medium pressure of the outflow section c, the valve clack 2 resets towards the sealing opening b, the flow passage 11 is cut off, the valve clack reset assembly comprises a guide sleeve 3 and a compression spring 4, the guide sleeve 3 is installed at the outflow section c, the valve clack 2 is provided with a rear positioning shaft 21 towards the guide sleeve 3 along the axial direction of the flow passage 11, the guide sleeve 3 and the rear positioning shaft 21 are in guide sliding fit relative to the axial direction of the flow passage 11, the compression spring 4 is sleeved on the rear positioning shaft 21 and compressed between the valve clack 2 and the guide sleeve 3, the other side of the guide sleeve 3 relative to the valve clack 2 is provided with a positioning ring 31, the periphery of the positioning ring 31 is in fixed fit with the inner wall of the outflow section c, an integral structure is adopted, parts such as the valve clack 2 are all installed in, the check valve has no external leakage point, therefore, the check valve can better ensure no external leakage of medium, and is particularly suitable for harsh working conditions such as high temperature and high pressure, when the medium in the pipeline flows from the inflow section a to the outflow section c, under the action of medium pressure, the medium force overcomes the pretightening force of a spring behind the valve clack 2 to open the valve clack 2, the medium flows through the check valve, when the valve clack 2 of the axial flow check valve is fully opened, the flow channel 11 is smooth, the fluid resistance is small, the energy loss of the medium is small, meanwhile, the valve clack 2 of the axial flow check valve does not need a large opening degree, the time required for closing the valve clack 2 is short, the backflow of the medium in the pipeline system can be quickly and effectively prevented, the axial flow check valve can be quickly closed before the medium in the pipeline flows backwards at high speed, thereby effectively preventing the high-, thereby effectively controlling the water hammer pressure of the check valve and ensuring the safety of the system.

The periphery of position circle 31 and the inner wall of the section c that flows out are screw-thread fit between, the inner wall of the section c that flows out is provided with the spacing step 12 that offsets with position circle 31 with the tip that 31 periphery screw-thread fit's of position circle part is close to into flow section an, position circle 31 is provided with the corner 311 with spacing step 12 looks adaptation, adopt screw-thread fit's mode to fix position circle 31 and valve body 1, the dismouting is more simple and convenient, pending position circle 31 offsets with spacing step 12, accurately install promptly and target in place.

The guide sleeve 3 is a hollow component, the hollow part of the guide sleeve 3 is used as a mounting cavity 36, a rear bushing 32 is arranged in the mounting cavity 36, a mounting hole 321 is axially formed in the rear bushing 32 along the flow channel 11, a spring seat 33 abutting against the end part of the compression spring 4 is fixed in the mounting hole 321, a rear guide hole 331 in sliding fit with the rear positioning shaft 21 is axially formed in the spring seat 33 along the flow channel 11, the guide sleeve 3 is hollow, the rear bushing 32 is arranged in the hollow part, the structure is more compact while the protection of the spring is improved, the bushing and the spring seat 33 are integrated, the bushing has the functions of compressing the spring 4 and sliding fit with the rear positioning shaft 21, and the structure is further simplified.

The periphery of the valve flap 2 is provided with a first guide cambered surface 22 which guides a medium flowing from the inflow section a to the outflow section c to the periphery of the guide sleeve 3 towards the outer side of the valve flap 2, the periphery of the guide sleeve 3 is provided with a second guide cambered surface 34 of which the outer diameter gradually decreases along the direction from the inflow section a to the outflow section c, the part of the inner wall of the outflow section c corresponding to the guide sleeve 3 is provided with a third guide cambered surface 13 of which the shape is matched with that of the second guide cambered surface 34, on one hand, the medium flowing in the forward direction (namely, the medium flowing from the inflow section a to the outflow section c) bypasses the spring between the valve flap 2 and the guide sleeve 3 under the guide of the first guide cambered surface 22, flows out of the flow channel 11 from the outflow section c through a channel with constant specification formed by the second guide cambered surface 34 and the second guide cambered surface 34, and protects the spring from the forward direction, on the other hand, the medium flowing in the reverse direction (namely, the medium flowing from the inflow section a to the outflow, the spring between the valve clack 2 and the guide sleeve 3 is also bypassed, and finally the spring is acted on the valve clack 2, so that the spring is protected in the reverse direction, the spring is well protected by combination, and the spring is not easy to damage, thereby improving the performance stability and prolonging the service life.

Be provided with a plurality of installation muscle 322 along circumference equidistance between the chamber wall of back bush 32 periphery and installation cavity 36, space between the adjacent installation muscle 322 is as the medium flow space, the tip that the uide bushing 3 kept away from inflow section an is seted up the installation cavity 36 along runner 11 axial with the through-hole 35 of the section c UNICOM of effluenting, add through-hole 35, the messenger effluences section c's the medium can pass through the space between through-hole 35 and the installation muscle in proper order and act on valve clack 2 fast, help improving the reaction rate of non return, help valve clack 2 to close fast.

Three rear guide ribs 311 are arranged between the inner peripheries of the guide sleeve 3 and the positioning ring 31 at equal intervals along the circumferential direction, the space between the adjacent rear guide ribs 311 is used as a medium flowing space, the number of the rear guide ribs 311 is three, and the installation reliability of the guide sleeve 3 is ensured while the medium flow is ensured.

The front bush 6 is coaxially arranged on the flow inlet section a, the front bush 6 is provided with a front guide hole 61 along the axial direction of the flow channel 11, a plurality of front guide ribs 62 for fixing the front bush 6 and the inner wall of the flow inlet section a are arranged between the periphery of the front bush 6 and the inner wall of the flow channel 11, the valve clack 2 is provided with a front positioning shaft 23 towards the front bush 6 along the axial direction of the flow channel 11, the front positioning shaft 23 is in sliding fit with the front guide hole 61, the space between the adjacent front guide ribs 62 is used as a medium flowing space, the front positioning shaft is additionally arranged, so that the front and the back of the valve clack 2 are provided with,

the quantity of preceding direction muscle 62 is two and the symmetry sets up in preceding bush 6 both sides, and two are selected to preceding quantity of direction muscle 62, guarantees the installation reliability of preceding bush 6 when guaranteeing the medium flow.

The sealing opening b is provided with a valve seat 7 formed by overlaying a wear-resistant material, the valve seat 7 formed by overlaying the wear-resistant material enables the sealing opening b to have better sealing performance, and hard alloy is generally adopted as the wear-resistant material.

The fixed rings 8 that are provided with in the valve body 1 outside add rings 8, make the check valve be convenient for hoist and mount.

Claims

1. An axial-flow type non-leakage check valve comprises a valve body, a valve clack and a valve clack reset assembly, wherein a flow channel is arranged in the valve body, the flow channel is provided with a flow inlet section, a sealing opening and a flow outlet section which are axially arranged, the medium pressure of the flow inlet end is greater than the sum of the reset force of the reset assembly and the medium pressure of the flow outlet section, the valve clack is far away from the sealing opening, and the flow channel is opened; the medium pressure of influent stream end be less than or equal to the reset power that resets the subassembly and the medium pressure total sum of the section of effluenting, the valve clack resets to the sealing port, the runner cuts off its characterized in that: the valve clack reset assembly include uide bushing and compression spring, the uide bushing install in the section of effluenting, the valve clack be provided with the back location axle along runner axial direction uide bushing, uide bushing and back location axle between be relative runner axial direction and slide the cooperation, compression spring cover locate the back location axle and compress between valve clack and uide bushing, the opposite side of the relative valve clack of uide bushing be provided with the position circle, the position circle periphery be fixed coordination with the inner wall of the section of effluenting.

2. The axial flow no-leak check valve of claim 1, wherein: the positioning ring periphery and the inner wall of the outflow section are in threaded fit, and the end parts of the inner wall of the outflow section and the positioning ring periphery in threaded fit, which are close to the inflow section, are provided with limiting steps which abut against the positioning ring.

3. The axial flow no-leak check valve of claim 1, wherein: the guide sleeve is a hollow component, the hollow part of the guide sleeve is used as an installation cavity, a rear bushing is arranged in the installation cavity, an installation hole is formed in the rear bushing along the axial direction of the flow channel, a spring seat which is abutted to the end part of the compression spring is fixed in the installation hole, and a rear guide hole which is matched with the rear positioning shaft in a sliding mode is formed in the spring seat along the axial direction of the flow channel.

4. The axial flow no-leak check valve of claim 3, wherein: the valve comprises a valve clack, a guide sleeve and a guide section, wherein a first guide cambered surface is arranged on the periphery of the valve clack and used for guiding a medium flowing from the inflow section to the outflow section to the outer side of the valve clack to the periphery of the guide sleeve, a second guide cambered surface is arranged on the periphery of the guide sleeve and has an outer diameter gradually reduced along the direction from the inflow section to the outflow section, and a third guide cambered surface is arranged on the inner wall of the outflow section, corresponding to the guide sleeve, and matched with the second guide cambered surface in shape.

5. The axial flow no-leak check valve of claim 4, wherein: the rear bushing periphery and the chamber wall of installation cavity between be provided with a plurality of installation muscle along circumference equidistance, adjacent installation muscle between the space as the medium flow space, the uide bushing keep away from the tip of inflow section and seted up the through-hole with the installation cavity with the section UNICOM of effluenting along the flow path axial.

6. The axial flow no-leak check valve of claim 1, wherein: the uide bushing and position circle internal week between be provided with three back direction muscle along circumference equidistance, adjacent back direction muscle between the space as the medium flow space.

7. The axial flow no-leak check valve of claim 1, wherein: the valve clack is provided with a front positioning shaft towards the front bushing along the axial direction of the flow channel, the front positioning shaft is in sliding fit with the front guiding hole, and the space between the adjacent front guiding ribs is used as a medium flowing space.

8. The axial flow no-leak check valve of claim 7, wherein: the number of the front guide ribs is two, and the front guide ribs are symmetrically arranged on two sides of the front bushing.

9. The axial flow no-leak check valve of claim 1, wherein: the sealing opening is provided with a valve seat formed by overlaying a wear-resistant material.

10. The axial flow no-leak check valve of claim 1, wherein: and a lifting ring is fixedly arranged on the outer side of the valve body.