CN219866292U

CN219866292U - Bypass valve sealing structure

Info

Publication number: CN219866292U
Application number: CN202321711253.0U
Authority: CN
Inventors: 杨斌; 周宏斌; 郭凯; 李凯; 黄源珣; 王锐; 王建飞; 蒋丙雷; 张鹏; 徐坤; 李超群; 李�浩; 姚弘毅
Original assignee: Huadian Zibo Thermal Power Co ltd
Current assignee: Huadian Zibo Thermal Power Co ltd
Priority date: 2023-07-03
Filing date: 2023-07-03
Publication date: 2023-10-20
Anticipated expiration: 2033-07-03

Abstract

The utility model discloses a bypass valve sealing structure, which relates to the technical field of valve bodies and comprises a bypass valve shell, wherein a top cover is fixedly arranged on the top surface of the bypass valve shell, a threaded rod is connected with the top surface of the top cover in a penetrating and threaded manner, a communication cavity is formed in the bypass valve shell, a flow groove is formed in the inner wall of the communication cavity, a cage cover is arranged in the flow groove, a communication hole is formed in the outer wall of the cage cover in a penetrating manner, and a limit groove is formed below the flow groove.

Description

Bypass valve sealing structure

The utility model relates to the technical field of valve bodies, in particular to a bypass valve sealing structure.

Background

The main function of the bypass valve is vapor regulation-high-pressure throttling decompression and superheated vapor cooling.

In the prior art, as disclosed in chinese patent CN217381725U, a sealing structure for a bypass valve seat of a high-pressure three-way valve is composed of a valve body, a graphite ring, a compression ring, a disc spring and a bypass valve seat, wherein the graphite ring, the compression ring and the disc spring are arranged between the valve body and the bypass valve seat, the disc spring provides a pretightening force to drive the compression ring to compress the graphite ring, and a seal is formed between the valve body and the bypass valve seat to isolate a main path and a bypass.

In the prior art, the original structure of the bypass valve is linear seal, namely, the valve core sealing surface and the valve center line form an included angle of 30 degrees or 45 degrees, the sealing surface is opposite to an opening on the cage cover, steam flow forms positive impact on the valve core sealing surface, water drops impact on the surface of a valve inner part at a high speed to cause damage, continuous leakage is generated after the sealing surface is damaged, water particles in the steam generate a cutting effect on the metal surface, the damage degree is further increased, and damage is formed on the valve core sealing surface of the valve.

Disclosure of Invention

The utility model aims to solve the problems that the original structure of a bypass valve in the prior art is linear seal, namely a valve core sealing surface forms an included angle of 30 degrees or 45 degrees with a valve center line, the sealing surface is opposite to an opening on a cage cover, steam flow forms frontal impact on the valve core sealing surface, water drops impact on the surface of a valve internal part at a high speed to cause damage, continuous leakage is generated after the sealing surface is damaged, water particles in the steam generate a cutting effect on a metal surface, the damage degree is further aggravated, and damage is formed on the valve core sealing surface of the valve.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a bypass valve seal structure, includes the bypass valve shell, the top surface fixed mounting of bypass valve shell has the top cap, the top surface of top cap runs through threaded connection and has the threaded rod, the inside of bypass valve shell is provided with the intercommunication chamber, the flow groove has been seted up to the inner wall in intercommunication chamber, the inside of flow groove is provided with the cage, the outer wall of cage runs through and has seted up the intercommunicating pore, the below of flow groove is provided with the spacing groove, the inner wall swing joint of spacing groove has the bottom plate, the top surface of bottom plate and the bottom fixed connection of cage, the inner wall swing joint of spacing groove has the spacing ring board, the inner wall fixedly connected with disk seat of spacing ring board, the inside of cage is provided with the plane case, the top surface of plane case and the bottom fixed connection of threaded rod.

Preferably, an input pipe is fixedly communicated with one side of the top of the bypass valve shell, an output pipe is fixedly communicated with one side of the bottom end of the bypass valve shell, and the input pipe is communicated with the output pipe through a communication cavity.

Preferably, the top end of the communication hole is fixedly connected with a valve cover.

Preferably, the center of the top surface of the valve cover is penetrated and provided with a movable hole, and the inner wall of the movable hole is movably connected with the outer wall of the threaded rod.

Preferably, the top surface of valve gap has seted up spacing slot, the inner wall swing joint of spacing slot has the gag lever post, the top of gag lever post and the bottom surface fixed connection of top cap.

Preferably, the top surface of the top cover is movably connected with a bolt in a penetrating mode, and the bolt is connected with the top surface of the bypass valve shell in a threaded mode.

Preferably, the top of threaded rod fixedly connected with fixed block, the outer wall fixedly connected with driving lever of fixed block.

Compared with the prior art, the utility model has the advantages and positive effects that:

1. according to the utility model, the plane valve core is driven to lift in the cage through rotating the threaded rod, so that steam introduced into the input pipe flows into the communication cavity through the flow groove and the communication hole, is discharged outwards through the output pipe, and the air flow of the steam is not easy to directly erode the surface of the plane valve core through the plane arrangement of the plane valve core, so that the loss of the plane valve core is reduced, and the service life of the plane valve core is prolonged.

2. According to the utility model, the top cover can be detached from the bypass valve shell by the aid of the bolt on the top cover, so that the user can conveniently take out all components in the bypass valve shell, machining repair is facilitated when the bypass valve shell is damaged, and maintenance cost is greatly reduced.

Drawings

FIG. 1 is a schematic perspective view of a bypass valve seal structure according to the present utility model;

FIG. 2 is a schematic diagram showing the internal structure of a bypass valve seal structure according to the present utility model;

FIG. 3 is an enlarged view of the structure A in FIG. 2 showing a sealing structure of a bypass valve according to the present utility model;

fig. 4 is a schematic diagram of a valve cover structure of a bypass valve sealing structure according to the present utility model.

Legend description: 1. a bypass valve housing; 11. an input tube; 12. an output pipe; 13. a communication chamber; 14. a flow channel; 15. a limit groove; 16. a limiting ring plate; 17. a valve seat; 2. a top cover; 21. a bolt; 22. a threaded rod; 23. a fixed block; 24. a deflector rod; 25. a limit rod; 26. a planar valve core; 3. a valve cover; 31. a cage cover; 32. a communication hole; 33. a bottom plate; 34. a limit slot; 35. a movable hole.

Description of the embodiments

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.

Examples

As shown in fig. 1-4, the utility model provides a bypass valve sealing structure, which comprises a bypass valve shell 1, wherein a top cover 2 is fixedly arranged on the top surface of the bypass valve shell 1, a threaded rod 22 is connected with the top surface of the top cover 2 in a penetrating threaded manner, a communication cavity 13 is arranged in the bypass valve shell 1, a flow groove 14 is formed in the inner wall of the communication cavity 13, a cage 31 is arranged in the flow groove 14, a communication hole 32 is formed in the outer wall of the cage 31 in a penetrating manner, a limit groove 15 is arranged below the flow groove 14, a bottom plate 33 is movably connected with the inner wall of the limit groove 15, the top surface of the bottom plate 33 is fixedly connected with the bottom end of the cage 31, a limit ring plate 16 is movably connected with the inner wall of the limit ring plate 16, a valve seat 17 is fixedly connected with the inner wall of the cage 31, a plane valve core 26 is arranged in the cage 31, and the top surface of the plane valve core 26 is fixedly connected with the bottom end of the threaded rod 22.

In the following, the specific arrangement and action of the present embodiment will be specifically described, the threaded rod 22 is rotated to drive the planar valve core 26 to lift in the cage 31, so that the steam introduced into the input pipe 11 flows into the communication cavity 13 through the flow groove 14 and the communication hole 32, is discharged outwards through the output pipe 12, and the planar arrangement of the planar valve core 26 makes the airflow of the steam difficult to directly erode the surface of the planar valve core 26, thereby reducing the loss of the planar valve core 26 and improving the service life of the present utility model.

Examples

As shown in fig. 1-4, an input pipe 11 is fixedly connected to one side of the top of the bypass valve casing 1, an output pipe 12 is fixedly connected to one side of the bottom end of the bypass valve casing 1, the input pipe 11 is communicated with the output pipe 12 through a communication cavity 13, a valve cover 3 is fixedly connected to the top end of the communication hole 32, a movable hole 35 is formed in the center of the top surface of the valve cover 3 in a penetrating mode, the inner wall of the movable hole 35 is movably connected with the outer wall of the threaded rod 22, a limiting slot 34 is formed in the top surface of the valve cover 3, a limiting rod 25 is movably connected to the inner wall of the limiting slot 34, the top end of the limiting rod 25 is fixedly connected with the bottom surface of the top cover 2, a bolt 21 is movably connected to the top surface of the bypass valve casing 1 in a penetrating mode, a fixed block 23 is fixedly connected to the top end of the threaded rod 22, and a deflector 24 is fixedly connected to the outer wall of the fixed block 23.

The effect that its whole embodiment reaches is, through the grafting spacing of gag lever post 25 and spacing slot 34, make valve gap 3 stable install in the inside of bypass valve shell 1, through the setting of bolt 21 on top cap 2, make the user can dismantle top cap 2 from bypass valve shell 1, and then the user of being convenient for takes out each subassembly in the utility model, be convenient for carry out machining repair when the damage, greatly reduced maintenance cost, through the setting of driving lever 24, the user of being convenient for rotates threaded rod 22 and drives planar case 26 and promote in cage 31.

The application method and the working principle of the device are as follows: when the bypass valve is used, high-temperature steam is introduced into the communication cavity 13 through the input pipe 11, the threaded rod 22 is rotated through the deflector rod 24 to drive the planar valve core 26 to lift in the cage 31, so that the steam introduced by the input pipe 11 flows into the communication cavity 13 through the flow groove 14 and the communication hole 32 and is discharged outwards through the output pipe 12, the surface of the planar valve core 26 is not easy to be directly eroded by the steam flow through the planar arrangement of the planar valve core 26, the loss of the planar valve core 26 is reduced, the service life of the bypass valve is prolonged, the valve cover 3 is stably arranged in the bypass valve shell 1 through the insertion limit of the limit rod 25 and the limit slot 34, the top cover 2 is arranged through the bolt 21 on the top cover 2, a user can detach the top cover 2 from the bypass valve shell 1, and further, the user can take out all components in the bypass valve shell conveniently, machining repair is carried out conveniently when the bypass valve is damaged, and the maintenance cost is greatly reduced.

The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims

1. A bypass valve sealing structure comprising a bypass valve housing (1), characterized in that: the top surface fixed mounting of bypass valve shell (1) has top cap (2), the top surface through-thread connection of top cap (2) has threaded rod (22), the inside of bypass valve shell (1) is provided with intercommunication chamber (13), flow groove (14) have been seted up to the inner wall of intercommunication chamber (13), the inside of flow groove (14) is provided with cage (31), communication hole (32) have been seted up in the outer wall penetration of cage (31), the below of flow groove (14) is provided with spacing groove (15), the inner wall swing joint of spacing groove (15) has bottom plate (33), the top surface of bottom plate (33) and the bottom fixed connection of cage (31), the inner wall swing joint of spacing groove (15) has spacing crown plate (16), the inner wall fixedly connected with disk seat (17) of spacing crown plate (16), the inside of cage (31) is provided with plane case (26), the top surface of plane case (26) and the bottom fixed connection of bottom plate (22).

2. A bypass valve seal as recited in claim 1, wherein: an input pipe (11) is fixedly communicated with one side of the top of the bypass valve shell (1), an output pipe (12) is fixedly communicated with one side of the bottom end of the bypass valve shell (1), and the input pipe (11) is communicated with the output pipe (12) through a communication cavity (13).

3. A bypass valve seal as recited in claim 1, wherein: the top end of the communication hole (32) is fixedly connected with a valve cover (3).

4. A bypass valve sealing structure as claimed in claim 3, wherein: the center of the top surface of the valve cover (3) is penetrated and provided with a movable hole (35), and the inner wall of the movable hole (35) is movably connected with the outer wall of the threaded rod (22).

5. A bypass valve sealing structure as recited in claim 4, wherein: the top surface of valve gap (3) has seted up spacing slot (34), the inner wall swing joint of spacing slot (34) has gag lever post (25), the top of gag lever post (25) and the bottom surface fixed connection of top cap (2).

6. A bypass valve seal as recited in claim 1, wherein: the top surface of top cap (2) runs through swing joint and has bolt (21), bolt (21) threaded connection is at the top surface of bypass valve shell (1).

7. A bypass valve seal as recited in claim 1, wherein: the top of threaded rod (22) fixedly connected with fixed block (23), the outer wall fixedly connected with driving lever (24) of fixed block (23).