CN220688127U - Guide assembly and axial flow type check valve - Google Patents

Abstract

The utility model discloses a guide assembly and an axial flow check valve, wherein the guide assembly comprises a support frame, a guide sleeve piece, a first sliding limiting piece and a second sliding limiting piece, and the support frame is arranged in a flow passage cavity; the guide sleeve piece is fixedly connected to the support frame, a guide cavity is penetrated in the guide sleeve piece, and the guide cavity is suitable for sliding with the valve clack; any sliding limiting piece is arranged in the guide cavity. The guide assembly is positioned and installed with the guide sleeve member through the support frame so as to provide support for the sliding travel of the valve clack; the first sliding limiting piece and the second sliding limiting piece limit the sliding of the valve clack respectively, the alignment capability of the movement of the valve clack in the same expected direction is enhanced, the coaxiality of the sliding axis of the valve clack and the guiding direction of the guiding piece is enhanced, so that the radial runout of the movement of the valve clack is reduced, the risk of the valve clack blocking is reduced, and the fluency of the valve clack operation is promoted. The check valve provided by the utility model has good stability and sealing performance in the working process.

Description

Guide assembly and axial flow type check valve

Technical Field

The utility model relates to the technical field of check valves, in particular to a guide assembly and an axial flow check valve.

Background

The axial flow check valve has the characteristics of low pressure drop, rapid opening and closing, timely dynamic response and low noise, is mainly used for the outlets of key equipment such as pumps, compressors and the like, and is widely applied to industries such as long-distance pipelines, petrochemical industry, storage facilities, LNG (liquefied natural gas) receiving stations and the like. In the liquefied natural gas industry, ultra-low temperature axial flow check valves are favored by users.

The check valve is displaced by the medium pressure acting on the valve flap to open the flow passage; at present, under the working condition of ultralow temperature, the check valve has the problems of poor stability and poor sealing performance in the actual working process because the medium continuously extrudes the valve clack in the flowing direction due to high fluid resistance, so that the valve clack moves Yi Kazu, the valve clack opening and closing process is not smooth to operate.

Disclosure of Invention

The technical problem to be solved by the utility model is that in the related art, under the ultralow temperature working condition of the check valve, the movement Yi Kazu of the valve clack causes the defects of unsmooth operation, poor working stability and poor sealing performance of the check valve in the valve clack opening and closing process.

The present utility model provides a guide assembly comprising:

the support frame is suitable for being fixedly installed with the valve body and is arranged in the runner cavity;

the guide sleeve piece is fixedly connected to the support frame, a guide cavity is penetrated in the guide sleeve piece, and the guide cavity is suitable for sliding with the valve clack;

the guide sleeve comprises a guide sleeve body, a guide sleeve, a valve clack, a first sliding limiting piece, a second sliding limiting piece, a first sliding limiting piece and a second sliding limiting piece, wherein any sliding limiting piece is arranged in the guide cavity, the first sliding limiting piece and the second sliding limiting piece are spaced and are respectively arranged adjacent to the end parts of the guide sleeve in the length direction, and a through hole suitable for sliding configuration with the valve clack is formed in any sliding limiting piece in a penetrating mode.

Optionally, the concave structure in the direction chamber has the annular structure, the annular structure is provided with two, two the annular structure respectively with first slip locating part with the second slip locating part is suitable to be set up correspondingly.

Optionally, the guide sleeve member is provided as a hollow cylinder, and any sliding limiting member is configured as a sliding bearing; the guide sleeve piece, the first sliding limiting piece and the second sliding limiting piece are coaxially arranged.

Optionally, the support frame includes a support body, a connection portion, and a mounting portion;

the supporting body is internally provided with a containing cavity, and the connecting part and the guide sleeve piece are arranged in the containing cavity;

the inner edge side of the connecting part is fixedly connected with the guide sleeve piece, the outer edge side of the connecting part is fixedly connected with the supporting body, and the end part, close to the supporting body, of the guide sleeve piece is arranged at intervals with the supporting body;

the mounting part is arranged on the outer wall surface of the supporting body.

Optionally, the supporting body is a revolving body structure, and a plurality of communication ports for medium circulation are arranged on the supporting body; the mounting part and the connecting part are distributed in an annular mode along the extending axis of the supporting body; and/or

The supporting body, the mounting part and the connecting part are integrally formed or welded.

Optionally, the above-mentioned direction subassembly still includes locking structure, locking structure includes elastic component and regulating part, elastic component one end with the regulating part can dismantle and link to each other, and the other end is suitable for spacing the linking to each other with the valve clack, the installation end threaded connection of regulating part is in on the support frame.

An axial flow check valve comprises a valve body, a valve clack and the guide component; the valve body and the valve clack are configured to be movably connected, and the valve clack moves along the guiding direction of the guiding component so as to open or close the check valve.

Optionally, an extension sleeve portion is arranged on the valve clack, at least one pressure balance hole is arranged on the extension sleeve portion, the extension sleeve portion is movably arranged in the guide cavity, and an inner cavity of the extension sleeve portion is communicated with the flow channel cavity.

Optionally, the valve body is provided with a circulation port and a transition wall surface, the circulation port and the transition wall surface are in round corner transition, and the valve clack is movably arranged between the circulation port and the guide component;

be equipped with the non return portion on the valve clack, the non return side of non return portion is towards the circulation mouth sets up, extend sleeve portion fixed the setting be in the non return portion is kept away from one side of circulation mouth.

Optionally, the extension sleeve portion and the non-return portion are configured as a coaxially disposed solid of revolution;

the valve body is provided with a first hard sealing layer, the check side of the check part is provided with a second hard sealing layer, the check valve is in a closed state, and the first hard sealing layer and the second hard sealing layer are in butt fit;

the side of the non-return part, which is away from the non-return side of the non-return part, is provided with a guide wall surface, and the pressure balance hole is adjacent to the guide wall surface.

The technical scheme provided by the utility model has the following advantages:

1. the guide assembly provided by the utility model is positioned and installed through the support frame to support the sliding stroke of the valve clack; the first sliding limiting piece and the second sliding limiting piece limit the sliding of the valve clack respectively, strengthen the alignment capability of the movement of the valve clack in the same expected direction, are arranged at intervals and are arranged at the two ends of the length direction of the guide sleeve piece respectively, so that the coaxiality of the sliding axis of the valve clack and the guiding direction of the guide sleeve piece is improved, the radial runout of the movement of the valve clack is reduced, the risk of the valve clack blocking is reduced, the smooth degree of the valve clack operation is promoted, and the stability and the tightness of the check valve adopting the guiding assembly in the working process are improved.

2. According to the guide assembly provided by the utility model, the first sliding limiting piece and the second sliding limiting piece are respectively assembled and accommodated through the two ring groove structures of the concave structure in the guide cavity, so that the sliding stroke of the valve clack is adapted, and the movement resistance of the valve clack is reduced.

3. When the pressure of fluid medium is larger than the opening resistance of the valve, the valve clack slides towards the support frame; the sliding stroke of the valve clack is limited and guided by the guide component, the capacity of the valve clack to move in the same expected direction is enhanced, the radial runout of the movement of the valve clack can be reduced, the risk of blocking the valve clack under the ultralow-temperature working condition is reduced, the smooth degree of the valve clack in the check valve is improved, and the stability and the tightness of the check valve in the working process are improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of an axial flow check valve provided in an embodiment of the present utility model;

FIG. 2 is a schematic view of a guide assembly provided in an embodiment of the present utility model;

FIG. 3 is a schematic view of a guide sleeve member in a guide assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of a valve body in an axial flow check valve provided in an embodiment of the present utility model;

FIG. 5 is a schematic view of the structure of a valve flap in an axial flow check valve provided in an embodiment of the present utility model;

reference numerals illustrate:

11-a valve body; 111-flow port; 112-transition wall; 113-a first hard seal layer;

12-valve clack; 121-an extension sleeve portion; 122-a non-return portion; 123-a second hard seal layer; 124-pressure balance holes; 125-diversion wall surface;

21-a supporting frame; 211-a support body; 2111-communication port; 212-a connection; 213-mounting portion;

22-a guide sleeve member; 221-a guide lumen; 222-ring groove structure;

23-a first sliding limiting piece; 24-a second sliding limiting piece;

31-an elastic member; 32-adjusting member.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. 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.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Example 1

The present embodiment provides a guide assembly, referring to fig. 1 and 2, including a support frame 21, a guide sleeve member 22, a first sliding limiting member 23, and a second sliding limiting member 24; the support frame 21 is suitable for being fixedly installed with the valve body 11, and the support frame 21 is arranged in a flow passage cavity of the valve body 11; the guide sleeve member 22 is fixedly connected to the support frame 21, a guide cavity 221 is arranged in the guide sleeve member 22 in a penetrating manner, and the guide cavity 221 is suitable for being arranged in a sliding manner with the valve clack 12. A guide 22 is positioned and installed by a support frame 21 to provide support for the sliding travel of the valve flap 12.

Referring to fig. 2, any one of the sliding limiting members is installed in the guide cavity 221, and the first sliding limiting member 23 and the second sliding limiting member 24 are spaced apart and respectively abut against the end portions of the guide sleeve member 22 in the length direction, and a through hole adapted to be slidably disposed with the valve clack 12 is formed in any one of the sliding limiting members. The valve clack 12 slides through the through hole of any sliding limiting piece in the sliding stroke. The first sliding limiting piece 23 and the second sliding limiting piece 24 limit the sliding of the valve clack 12 respectively so as to strengthen the alignment capability of the movement of the valve clack 12 in the same expected direction, the first sliding limiting piece 23 and the second sliding limiting piece 24 are arranged at intervals and are respectively arranged at two ends of the guide sleeve piece 22 in the length direction, so that the coaxiality of the sliding axis of the valve clack 12 and the guide direction of the guide sleeve piece 22 is improved, the radial runout of the movement of the valve clack 12 is reduced, the risk of blocking the valve clack 12 under the ultralow-temperature working condition is reduced, the running fluency of the valve clack 12 is promoted, and the stability and the sealing performance of the check valve adopting the guide assembly in the working process can be improved.

In this embodiment, referring to fig. 3, the guiding cavity 221 is concavely configured with two ring groove structures 222, and the two ring groove structures 222 are respectively and conformably disposed with the first sliding limiter 23 and the second sliding limiter 24. The first sliding limiting piece 23 and the second sliding limiting piece 24 are respectively assembled and accommodated through the two ring groove structures 222 which are concavely formed in the guide cavity 221 so as to adapt to the sliding stroke of the valve clack 12, and the movement resistance of the valve clack 12 is reduced.

In some embodiments, the guide sleeve 22 is provided as a hollow cylinder, with either sliding stop configured as a sliding bearing; the guide member 22, the first sliding limiting member 23 and the second sliding limiting member 24 are coaxially arranged.

As a further embodiment, the guide assembly further comprises a third sliding limiter, which is arranged between the first sliding limiter 23 and the second sliding limiter 24 at intervals, by means of which the sliding movement of the flap 12 is guided further.

Referring to fig. 1, the guide assembly further includes a locking structure including an elastic member 31 and an adjusting member 32, wherein one end of the elastic member 31 is detachably connected with the adjusting member 32, and the other end is adapted to be in spacing connection with the valve flap 12, and the mounting end of the adjusting member 32 is in threaded connection with the support frame 21. The elastic pre-tightening force preset by the elastic piece 31 is adjusted through the adjusting piece 32, different elastic pre-tightening forces can be configured according to the pressure of different fluid media, the non-return capacity of the configuration valve can be flexibly adjusted, and the practicability is improved.

Referring to fig. 1 and 2, the support bracket 21 includes a support body 211, a connection portion 212, and a mounting portion 213; the support body 211 is internally provided with a containing cavity, and the connecting part 212 and the guide sleeve piece 22 are arranged in the containing cavity; the inner edge side of the connecting part 212 is fixedly connected with the guide sleeve member 22, the outer edge side of the connecting part 212 is fixedly connected with the supporting body 211, and the end part of the guide sleeve member 22 close to the supporting body 211 is arranged at intervals with the supporting body 211; the mounting portion 213 is provided on an outer wall surface of the support body 211. The mounting portion 213 is detachably connected in the flow passage chamber of the valve body 1, and the mounting portion 213 and the valve body 1 can be fixed by a screw connection.

In some embodiments, the supporting body 211, the mounting portion 213 and the connecting portion 212 are integrally formed, and the overall strength thereof is good; in other embodiments, the support body 211, the mounting portion 213, and the connection portion 212 are welded.

Referring to fig. 2, the support body 211 is configured as a solid of revolution, and the support body 211 is provided with a plurality of communication ports 2111 through which a medium flows, and the communication ports 2111 may be circumferentially disposed on the support body 211. Along the extending axis of the supporting body 211, the mounting parts 213 are distributed in a ring shape, so that a region for medium circulation is formed in the flow channel cavity; along the extending axis of the supporting body 211, the connecting portions 212 are distributed in a ring shape, so that a region for medium circulation is formed in the accommodating cavity, which is beneficial to enhancing the medium circulation capacity.

Example 2

The present embodiment provides an axial flow check valve, see fig. 1 and 2, comprising a valve body 11, a valve flap 12, and the guide assembly of embodiment 1; the valve body 11 and the valve flap 12 are configured to be movably connected, and the valve flap 12 moves in a guide direction of the guide assembly to open or close the check valve.

When the pressure of the fluid medium is greater than the valve opening resistance, the valve clack 12 slides towards the support frame 21; the sliding travel of the valve clack 12 is limited and guided by the guide component, so that the capability of the valve clack 12 to move in the same expected direction is enhanced, the radial runout of the movement of the valve clack 12 can be reduced, the risk of blocking the valve clack 12 under the ultralow temperature working condition is reduced, the smoothness of the operation of the valve clack 12 in the check valve is improved, and the stability and the tightness of the check valve in the working process are improved.

Referring to fig. 4, the valve body 11 is provided with a flow port 111 and a transition wall 112, the flow port 111 and the transition wall 112 are in round corner transition, and the valve clack 12 is movably arranged between the flow port 111 and the guide component; in the region near the flow port 111, the transition wall surface 112 is provided with a diameter enlarged so that the flow space of the fluid medium when the check valve is opened is enlarged by the transition wall surface 112, and the discharge of the fluid medium is promoted.

In this embodiment, referring to fig. 5, the valve clack 12 is provided with an extension sleeve portion 121 and a check portion 122, the extension sleeve portion 121 is provided with one or more pressure balance holes 124, the extension sleeve portion 121 is movably disposed in the guide cavity 221, and the inner cavity of the extension sleeve portion 121 is disposed in communication with the flow channel cavity; the non-return side of the non-return portion 122 is disposed toward the flow port 111, the extension sleeve portion 121 is fixedly disposed on a side of the non-return portion 122 away from the flow port 111, a guide wall surface 125 is disposed on a side of the non-return portion 122 away from the non-return side thereof, and the pressure balance hole 124 is disposed adjacent to the guide wall surface 125. The pressure balance holes 124 may be annularly distributed at one end of the extension sleeve portion near the non-return portion, where one end of each pressure balance hole 124 communicates with the flow channel cavity, and the other end communicates with the inner cavity of the extension sleeve portion 121. When the medium flows back, the flowing fluid medium is quickly diffused through the pressure balance holes 124 so as to promote the valve clack 12 to quickly form sealing force, the flowing fluid medium is guided to the pressure balance holes 124 through the guide wall 125, the distribution and diffusion process of the fluid medium is accelerated, and the sealing capability of the closing response of the check valve is enhanced.

Referring to fig. 4 and 5, the valve flap 12 is provided in an umbrella-like structure, and the extension sleeve portion 121 and the check portion 122 are configured as a coaxially disposed solid of revolution; the valve body 11 is provided with a first hard sealing layer 113, the non-return side of the non-return part 122 is provided with a second hard sealing layer 123, the non-return valve is in a closed state, and the first hard sealing layer 113 and the second hard sealing layer 123 are in abutting fit; a first hard sealing layer 113 is provided at the flow opening 111, the hard sealing layer being provided in a sealing convex structure. The hard sealing layer can be made of stellite through overlaying, and has the advantages of simple sealing structure, single-pass sealing, good sealing performance and low cost.

The axial-flow check valve that this embodiment provided, the check valve is in the working phase: the flow channel cavity of the valve body 11 is opened or closed back and forth through the valve clack 12, and when the valve is opened, the valve clack 12 is pushed to be opened by the acting force of the fluid medium against the spring force and the friction force of the elastic piece 31; the elastic element 31 can play a role in buffering by absorbing energy of the valve clack 12 through the action of the fluid medium by the elastic element 31; when the acting force of the fluid medium on the valve clack 12 is smaller than the elastic force of the elastic member 31, the elastic member 31 acts on the valve clack 12 to gradually close the flow passage cavity of the valve body 11, the check part 122 covers the sealing flow opening 111, and the first hard sealing layer 113 and the second hard sealing layer 123 are in abutting contact so as to prevent backflow of the fluid medium. The reciprocating sliding movement of the valve clack 12 is limited by the guide sleeve 22, the first sliding limiting piece 23 and the second sliding limiting piece 24.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (10)

1. A guide assembly, comprising:

the support frame (21) is suitable for being fixedly installed with the valve body (11), and the support frame (21) is arranged in the runner cavity;

the guide sleeve piece (22) is fixedly connected to the support frame (21), a guide cavity (221) is arranged in the guide sleeve piece (22) in a penetrating mode, and the guide cavity (221) is suitable for being arranged in a sliding mode with the valve clack (12);

the valve comprises a guide cavity (221), a first sliding limiting piece (23) and a second sliding limiting piece (24), wherein any sliding limiting piece is arranged in the guide cavity, the first sliding limiting piece (23) and the second sliding limiting piece (24) are spaced and are respectively adjacent to the end parts of the guide sleeve piece (22) in the length direction, and a through hole suitable for sliding configuration with the valve clack (12) is formed in any sliding limiting piece in a penetrating mode.

2. The guide assembly according to claim 1, wherein the guide cavity (221) is concavely configured with ring groove structures (222), two ring groove structures (222) are arranged, and the two ring groove structures (222) are respectively arranged in a conformal corresponding mode with the first sliding limiting piece (23) and the second sliding limiting piece (24).

3. The guide assembly according to claim 2, characterized in that the guide sleeve (22) is provided as a hollow cylinder, either sliding limiter being configured as a sliding bearing; the guide sleeve piece (22), the first sliding limiting piece (23) and the second sliding limiting piece (24) are coaxially arranged.

4. A guide assembly according to any one of claims 1-3, characterized in that the support frame (21) comprises a support body (211), a connection portion (212) and a mounting portion (213);

the supporting body (211) is internally provided with a containing cavity, and the connecting part (212) and the guide sleeve piece (22) are arranged in the containing cavity;

the inner edge side of the connecting part (212) is fixedly connected with the guide sleeve member (22), the outer edge side of the connecting part (212) is fixedly connected with the supporting body (211), and the end part, close to the supporting body (211), of the guide sleeve member (22) is arranged at intervals with the supporting body (211);

the mounting portion (213) is provided on an outer wall surface of the support body (211).

5. The guide assembly according to claim 4, wherein the supporting body (211) is provided with a revolving body structure, and a plurality of communication ports (2111) for medium circulation are formed in the supporting body (211); the mounting parts (213) and the connecting parts (212) are distributed in a ring shape along the extending axis of the supporting body (211); and/or

The supporting body (211), the mounting part (213) and the connecting part (212) are integrally formed or welded.

6. A guide assembly according to any one of claims 1-3, further comprising a locking structure comprising an elastic member (31) and an adjusting member (32), one end of the elastic member (31) being detachably connected to the adjusting member (32), the other end being adapted to be in limited connection with the valve flap (12), the mounting end of the adjusting member (32) being threadedly connected to the support bracket (21).

7. An axial flow check valve comprising a valve body (11), a valve flap (12) and a guide assembly according to any one of claims 1-6; the valve body (11) and the valve clack (12) are configured to be movably connected, and the valve clack (12) moves along the guiding direction of the guiding assembly so as to open or close the check valve.

8. The axial flow check valve according to claim 7, wherein the valve clack (12) is provided with an extension sleeve portion (121), the extension sleeve portion (121) is provided with at least one pressure balance hole (124), the extension sleeve portion (121) is movably arranged in the guide cavity (221), and an inner cavity of the extension sleeve portion (121) is communicated with the flow channel cavity.

9. The axial flow check valve according to claim 8, wherein the valve body (11) is provided with a circulation port (111) and a transition wall surface (112), the circulation port (111) and the transition wall surface (112) are arranged in a rounded corner transition manner, and the valve clack (12) is movably arranged between the circulation port (111) and the guide assembly;

the valve clack (12) is provided with a check part (122), the check side of the check part (122) faces the circulation port (111), and the extension sleeve part (121) is fixedly arranged on one side, far away from the circulation port (111), of the check part (122).

10. The axial flow check valve according to claim 9, wherein the extension sleeve portion (121) and the check portion (122) are configured as a coaxially arranged solid of revolution;

a first hard sealing layer (113) is arranged on the valve body (11), a second hard sealing layer (123) is arranged on the non-return side of the non-return part (122), the non-return valve is in a closed state, and the first hard sealing layer (113) and the second hard sealing layer (123) are in abutting fit;

a guide wall surface (125) is arranged on one side of the non-return part (122) facing away from the non-return side, and the pressure balancing hole (124) is arranged adjacent to the guide wall surface (125).