CN223725570U - Auxiliary sealing valve - Google Patents
Auxiliary sealing valveInfo
- Publication number
- CN223725570U CN223725570U CN202520103031.3U CN202520103031U CN223725570U CN 223725570 U CN223725570 U CN 223725570U CN 202520103031 U CN202520103031 U CN 202520103031U CN 223725570 U CN223725570 U CN 223725570U
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- sealing
- valve
- gasket
- contact surface
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Abstract
本实用新型公开了一种辅助密封阀，涉及密封阀技术领域，包括阀体、侧体、球体和阀杆，所述阀杆与所述阀体之间设置有阀杆密封组件；所述阀体与所述侧体的接触面上设置有三重密封结构，所述三重密封结构包括菱形密封腔、辅助密封腔和异形密封腔，所述菱形密封腔内设置有四氟塑料垫圈，所述辅助密封腔内设置有金属石墨缠绕垫圈，所述异形密封腔内设置有异形密封垫圈，所述异形密封腔的内壁底面与顶面均设置有弧形凸起。本实用新型结合了四氟塑料垫圈、金属石墨缠绕垫圈二者的优点，既保证清洁也能承受高低温交替，且当所述四氟塑料垫圈、所述金属石墨缠绕垫圈二者均密封失效时，所述异形密封腔与所述异形密封垫圈可以起到辅助密封作用。
This utility model discloses an auxiliary sealing valve, relating to the field of sealing valve technology. It includes a valve body, a side body, a ball, and a valve stem. A valve stem sealing assembly is provided between the valve stem and the valve body. A triple sealing structure is provided on the contact surface between the valve body and the side body. The triple sealing structure includes a rhomboid sealing cavity, an auxiliary sealing cavity, and a non-rhomboid sealing cavity. A PTFE gasket is disposed in the rhomboid sealing cavity, a metal-graphite spiral wound gasket is disposed in the auxiliary sealing cavity, and a non-rhomboid sealing gasket is disposed in the non-rhomboid sealing cavity. The bottom and top surfaces of the inner wall of the non-rhomboid sealing cavity are both provided with arc-shaped protrusions. This utility model combines the advantages of both PTFE gaskets and metal-graphite spiral wound gaskets, ensuring cleanliness and withstanding alternating high and low temperatures. Furthermore, when both the PTFE gasket and the metal-graphite spiral wound gasket fail to seal, the non-rhomboid sealing cavity and the non-rhomboid sealing gasket can provide auxiliary sealing.
Description
Technical Field
The utility model relates to the technical field of sealing valves, in particular to an auxiliary sealing valve.
Background
The flange ball valve is widely applied in production and life, the application field relates to industries such as medicine, petroleum, chemical industry, natural gas and the like, and the flange ball valve is very convenient to install and use due to the standard flange connecting hole design. In addition, the valve seat adopts an elastic sealing structure, so that the valve seat is reliable in sealing and easy to open and close. Furthermore, a fire-resistant structure is provided which is still reliable in operation in the event of a fire and has good tightness.
The joint of the valve body and the side body of most flange ball valves in the market at present is sealed by only one gasket, usually a tetrafluoroplastic gasket or a metal winding gasket, when only the tetrafluoroplastic gasket is used, the high-temperature and low-temperature resistant range of the valve is limited, when only the metal graphite winding gasket is used, the high-temperature and low-temperature resistant condition of the valve can be improved, but the cleanliness of the valve is at risk of out of control, so that only a single sealing structure is adopted, and a certain limitation exists.
Disclosure of utility model
The utility model aims to provide an auxiliary sealing valve, which solves the problem that the flange ball valve in the background art only adopts a single sealing structure of a tetrafluoroplastic gasket or a metal winding gasket and has a certain limitation.
The utility model adopts the following technical scheme:
The utility model discloses an auxiliary sealing valve which comprises a valve body, a side body, a ball body and a valve rod, wherein the valve body is connected with the side body through a bolt, the ball body is arranged between the valve body and the side body, the ball body is in rotary sealing fit with the valve body and the side body, the upper end of the ball body is fixedly connected with the valve rod, the valve rod penetrates through the valve body, a valve rod sealing assembly is arranged between the valve rod and the valve body, and a triple sealing structure is arranged on the contact surface of the valve body and the side body and comprises a diamond sealing cavity, an auxiliary sealing cavity and a special sealing cavity.
The diamond-shaped sealing cavity is of a diamond structure, a tetrafluoroplastic gasket is arranged in the diamond-shaped sealing cavity in a sealing mode, a metal graphite winding gasket is arranged in the auxiliary sealing cavity in a sealing mode, a special-shaped sealing gasket is arranged in the special-shaped sealing cavity in a sealing mode, and arc-shaped protrusions are arranged on the bottom face and the top face of the inner wall of the special-shaped sealing cavity.
Further, a first gasket contact surface with an opening angle is arranged on the valve body, a second gasket contact surface with an opening angle is arranged on the side body, the first gasket contact surface and the second gasket contact surface are enclosed to form the diamond-shaped sealing cavity, and the section of the tetrafluoroplastic gasket is arranged to be of a diamond-shaped structure matched with the inner wall of the diamond-shaped sealing cavity;
The valve body is provided with a third gasket contact surface with a right angle, the side body is provided with a fourth gasket contact surface with a right angle, the third gasket contact surface and the fourth gasket contact surface are enclosed to form the auxiliary sealing cavity, and the section of the metal graphite winding gasket is arranged to be of a rectangular structure matched with the inner wall of the auxiliary sealing cavity;
The valve body is provided with a fifth gasket contact surface, the side body is provided with a sixth gasket contact surface, the fifth gasket contact surface and the sixth gasket contact surface enclose to form the special-shaped sealing cavity and the arc-shaped bulge, the butt joint positions of the fifth gasket contact surface and the sixth gasket contact surface are all located at the vertex positions of the arc-shaped bulge, and the directions of the bottom surface of the inner wall of the special-shaped sealing cavity and the arc-shaped bulge of the top surface are opposite.
The valve rod sealing assembly comprises a special-shaped thrust washer, a filler and a compression ring, wherein the bottom of the valve rod is provided with a conical boss, the special-shaped thrust washer is arranged between the conical boss and the valve body in a sealing mode, the filler is arranged between the valve rod and the valve body, the compression ring is tightly buckled above the filler, the compression ring is arranged between the valve rod and the valve body in a sealing mode, and a hexagonal nut is connected with the upper end of the valve rod in a threaded mode and is in compression fit with the compression ring.
Further, a double-layer butterfly spring piece is arranged between the hexagonal nut and the compression ring.
Further, a handle is arranged at the top of the valve rod.
Still further, the both sides of spheroid are provided with the disk seat, the disk seat is last to deviate from the spheroid one side is provided with the elastic groove.
Compared with the prior art, the utility model has the beneficial technical effects that:
the utility model combines the advantages of the tetrafluoroplastic gasket and the metal graphite winding gasket, ensures cleaning and can bear high-low temperature alternation, and when the tetrafluoroplastic gasket and the metal graphite winding gasket are in sealing failure, the special-shaped sealing cavity and the special-shaped sealing gasket can play an auxiliary sealing role.
Drawings
The utility model is further described with reference to the following description of the drawings.
FIG. 1 is a schematic diagram of an auxiliary sealing valve according to the present utility model;
FIG. 2 is a schematic diagram of a triple seal structure in the auxiliary seal valve of the present utility model;
FIG. 3 is a schematic view of the triple seal structure of the auxiliary seal valve of the present utility model with the gasket removed;
FIG. 4 is a schematic view of three seal gaskets of the triple seal arrangement in the auxiliary seal valve of the present utility model;
FIG. 5 is a schematic view of a valve seat structure in the auxiliary sealing valve of the present utility model;
FIG. 6 is a schematic view of a stem seal assembly in the auxiliary sealing valve of the present utility model;
FIG. 7 is a schematic view of a contoured thrust washer in an auxiliary sealing valve of the present utility model;
FIG. 8 is a front view of a valve stem and ball in the auxiliary sealing valve of the present utility model;
FIG. 9 is a side view of a valve stem and ball in the auxiliary sealing valve of the present utility model;
FIG. 10 is a schematic view of a double-layer butterfly spring in the auxiliary sealing valve of the present utility model;
FIG. 11 is a schematic illustration of the change in the tetrafluoroplastic gasket as the temperature of the valve body in the auxiliary sealing valve of the present utility model increases;
fig. 12 is a schematic view showing a change of the tetrafluoroplastic gasket when the temperature of the valve body in the auxiliary sealing valve of the present utility model is lowered.
The reference numerals indicate that 1, a valve body, 1-1, a first gasket contact surface, 1-2, a third gasket contact surface, 1-3, a fifth gasket contact surface, 2, a side body, 2-1, a second gasket contact surface, 2-2, a fourth gasket contact surface, 2-3, a sixth gasket contact surface, 3, a ball, 4, a valve rod, 4-1, a conical boss, 5, a valve rod sealing assembly, 5-1, a special-shaped thrust washer, 5-2, a packing, 5-3, a compression ring, 6, a valve seat, 6-1, an elastic groove, 7, a triple sealing structure, 7-1, a diamond sealing cavity, 7-2, an auxiliary sealing cavity, 7-3, a special-shaped sealing cavity, 7-4, a tetrafluoroplastic gasket, 7-5, a metal graphite winding gasket, 7-6, a special-shaped sealing gasket, 7-7, an arc-shaped bulge, 8, a hexagonal nut, 9, a double-layer anti-loose, 10, a handle, 11 and a spring plate.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1, this embodiment discloses an auxiliary sealing valve, including valve body 1, side body 2, spheroid 3 and valve rod 4, valve body 1 passes through bolted connection with side body 2, and spheroid 3 sets up between valve body 1 and side body 2, and spheroid 3 and valve body 1, side body 2 rotate sealing fit, and the upper end and the valve rod 4 fixed connection of spheroid 3, valve rod 4 pass valve body 1, and are provided with valve rod sealing component 5 between valve rod 4 and the valve body 1. A triple sealing structure 7 is arranged on the contact surface of the valve body 1 and the side body 2.
As shown in fig. 2 to 4, the triple seal structure 7 comprises a diamond seal cavity 7-1, an auxiliary seal cavity 7-2 and a special seal cavity 7-3, a special seal gasket 7-6 is arranged in the special seal cavity 7-3 in a sealing manner, and arc-shaped protrusions 7-7 are arranged on the bottom surface and the top surface of the inner wall of the special seal cavity 7-3. The diamond-shaped sealing cavity 7-1 is of a diamond-shaped structure, and a tetrafluoro plastic gasket 7-4 is arranged in the diamond-shaped sealing cavity 7-1 in a sealing way. The auxiliary sealing cavity 7-2 is internally provided with a metal graphite winding gasket 7-5 in a sealing way.
Specifically, a first gasket contact surface 1-1 with an opening angle is arranged on the valve body 1, a second gasket contact surface 2-1 with an opening angle is arranged on the side body 2, the first gasket contact surface 1-1 and the second gasket contact surface 2-1 are the same in shape, the first gasket contact surface 1-1 and the second gasket contact surface 2-1 are enclosed to form a diamond-shaped sealing cavity 7-1, and the section of the tetrafluoroplastic gasket 7-4 is arranged to be of a diamond-shaped structure matched with the inner wall of the diamond-shaped sealing cavity 7-1.
The valve body 1 is provided with a third gasket contact surface 1-2 with a right angle, the side body 2 is provided with a fourth gasket contact surface 2-2 with a right angle, the shape of the third gasket contact surface 1-2 is the same as that of the fourth gasket contact surface 2-2, the third gasket contact surface 1-2 and the fourth gasket contact surface 2-2 are enclosed to form an auxiliary sealing cavity 7-2, and the section of the metal graphite winding gasket 7-5 is set to be a rectangular structure matched with the inner wall of the auxiliary sealing cavity 7-2.
The valve body 1 is provided with a fifth gasket contact surface 1-3, the side body 2 is provided with a sixth gasket contact surface 2-3, the fifth gasket contact surface 1-3 and the sixth gasket contact surface 2-3 are enclosed to form a special-shaped sealing cavity 7-3 and an arc-shaped bulge 7-7, butt joint positions of the fifth gasket contact surface 1-3 and the sixth gasket contact surface 2-3 are located at the vertex positions of the arc-shaped bulge 7-7, and the directions of the arc-shaped bulges 7-7 on the bottom surface and the top surface of the inner wall of the special-shaped sealing cavity 7-3 are opposite. The two arc-shaped bulges 7-7 which are spliced and face opposite directions can better fix the position of the special-shaped sealing gasket 7-6 on one hand and cannot easily cause the special-shaped sealing gasket to deviate left and right. On the other hand, if the sealing failure of the tetrafluoroplastic gasket 7-4 and the metal graphite wound gasket 7-5 causes the leakage of the medium due to the generation of gaps between the diamond-shaped sealing cavity 7-1 and the auxiliary sealing cavity 7-2, the special-shaped sealing gasket 7-6 has a third sealing effect, and if the sealing failure of the special-shaped sealing gasket 7-6 also causes the generation of gaps, a certain amount of leakage medium can be stored in the concave cavity space formed between the arc-shaped bulge 7-7 and the fifth gasket contact surface 1-3 and between the arc-shaped bulge 7-6 and the sixth gasket contact surface 2-3, so that a fourth auxiliary sealing effect is realized. In this embodiment, the special-shaped sealing gasket 7-6 is made of rubber, so that the installation is convenient.
As shown in fig. 5-10, the valve stem seal assembly 5 includes a contoured thrust washer 5-1, a packing 5-2, and a compression ring 5-3. The bottom of the valve rod 4 is provided with a conical boss 4-1, and a special-shaped thrust washer 5-1 is arranged between the conical boss 4-1 and the valve body 1 in a sealing manner. A packing 5-2 is arranged between the valve rod 4 and the valve body 1, a compression ring 5-3 is tightly buckled above the packing 5-2, and the compression ring 5-3 is arranged between the valve rod 4 and the valve body 1 in a sealing way. The upper end of the valve rod 4 is connected with a hexagonal nut 8 in a threaded manner, and the hexagonal nut 8 is in compression fit with the compression ring 5-3. The special-shaped thrust washer 5-1, the packing 5-2 and the compression ring 5-3 are combined, so that the sealing effect is greatly improved.
A double-layer butterfly-shaped elastic sheet 9 is arranged between the hexagonal nut 8 and the compression ring 5-3. The double-layer butterfly-shaped elastic sheet 9 enables the packing 5-2 to always keep the pressing force, and leakage can not occur.
The two sides of the sphere 3 are provided with valve seats 6, and one side of the valve seats 6 away from the sphere 3 is provided with an elastic groove 6-1. The elastic groove 6-1 can increase the elasticity of the sealing surface of the valve seat 6, reduce the sealing pretightening force, and enable the valve to have small operating torque and better sealing performance.
In this embodiment, the top of the valve rod 4 is provided with a handle 10, the handle 10 is fastened on the valve rod 4 through a hexagonal nut 8, and a locking gasket 11 is arranged between the handle 10 and the hexagonal nut 8 below.
As shown in FIG. 11, when the temperature of the valve is increased, the tetrafluoroplastic gasket 7-4 expands to press towards the side, away from the ball 3, of the diamond-shaped sealing cavity 7-1, so that the sealing effect is enhanced, and as shown in FIG. 12, when the temperature of the valve is reduced, the tetrafluoroplastic gasket 7-4 contracts to press towards the side, towards the ball 3, of the diamond-shaped sealing cavity 7-1, so that the sealing effect is enhanced.
The working principle of the utility model is as follows:
In the utility model, the valve body 1 is connected with the side body 2 through the bolt component, and the advantages of the tetrafluoroplastic gasket 7-4 and the metal graphite winding gasket 7-5 are combined, so that the cleaning is ensured, and the high-low temperature alternation can be borne. Meanwhile, if the sealing failure of the tetrafluoroplastic gasket 7-4 and the metal graphite wound gasket 7-5 causes the leakage of the medium due to the generation of gaps between the diamond-shaped sealing cavity 7-1 and the auxiliary sealing cavity 7-2, the special-shaped sealing gasket 7-6 has a third sealing effect, and if the sealing failure of the special-shaped sealing gasket 7-6 also causes the generation of cracks, a certain amount of leakage medium can be stored in a concave cavity space formed between the arc-shaped bulge 7-7 and the contact surface 1-3 of the fifth gasket and the contact surface 2-3 of the sixth gasket, so that a fourth auxiliary sealing effect is realized.
The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.
Claims (6)
1. The auxiliary sealing valve comprises a valve body (1), a side body (2), a ball body (3) and a valve rod (4), wherein the valve body (1) is connected with the side body (2) through a bolt, the ball body (3) is arranged between the valve body (1) and the side body (2), the ball body (3) is in rotary sealing fit with the valve body (1) and the side body (2), the upper end of the ball body (3) is fixedly connected with the valve rod (4), the valve rod (4) penetrates through the valve body (1), and a valve rod sealing assembly (5) is arranged between the valve rod (4) and the valve body (1), and the auxiliary sealing valve is characterized in that a triple sealing structure (7) is arranged on the contact surface of the valve body (1) and the side body (2), and the triple sealing structure (7) comprises a diamond sealing cavity (7-1), an auxiliary sealing cavity (7-2) and a special sealing cavity (7-3) ;
The diamond-shaped sealing cavity (7-1) is of a diamond structure, a tetrafluoroplastic gasket (7-4) is arranged in the diamond-shaped sealing cavity (7-1) in a sealing mode, a metal graphite winding gasket (7-5) is arranged in the auxiliary sealing cavity (7-2) in a sealing mode, a special-shaped sealing gasket (7-6) is arranged in the special-shaped sealing cavity (7-3) in a sealing mode, and arc-shaped protrusions (7-7) are arranged on the bottom face and the top face of the inner wall of the special-shaped sealing cavity (7-3).
2. The auxiliary sealing valve according to claim 1, wherein a first gasket contact surface (1-1) with an opening angle is arranged on the valve body (1), a second gasket contact surface (2-1) with an opening angle is arranged on the side body (2), the first gasket contact surface (1-1) and the second gasket contact surface (2-1) enclose to form the diamond-shaped sealing cavity (7-1), and the section of the tetrafluoroplastic gasket (7-4) is provided with a diamond-shaped structure matched with the inner wall of the diamond-shaped sealing cavity (7-1);
The valve body (1) is provided with a third gasket contact surface (1-2) with a right angle, the side body (2) is provided with a fourth gasket contact surface (2-2) with a right angle, the third gasket contact surface (1-2) and the fourth gasket contact surface (2-2) are enclosed to form an auxiliary sealing cavity (7-2), and the section of the metal graphite winding gasket (7-5) is of a rectangular structure matched with the inner wall of the auxiliary sealing cavity (7-2);
Be provided with fifth packing ring contact surface (1-3) on valve body (1), be provided with sixth packing ring contact surface (2-3) on side body (2), fifth packing ring contact surface (1-3) with sixth packing ring contact surface (2-3) enclose to form dysmorphism seal chamber (7-3) with arc protruding (7-7), just fifth packing ring contact surface (1-3) the butt joint position of sixth packing ring contact surface (2-3) all is located arc protruding (7-7) summit position department, just dysmorphism seal chamber (7-3) inner wall bottom surface with arc protruding (7-7) of top surface face are opposite.
3. The auxiliary sealing valve according to claim 1, wherein the valve stem sealing assembly (5) comprises a profiled thrust washer (5-1), a packing (5-2) and a compression ring (5-3);
The bottom of the valve rod (4) is provided with a conical boss (4-1), and the special-shaped thrust washer (5-1) is arranged between the conical boss (4-1) and the valve body (1) in a sealing way;
The packing (5-2) is arranged between the valve rod (4) and the valve body (1), the compression ring (5-3) is tightly buckled above the packing (5-2), and the compression ring (5-3) is arranged between the valve rod (4) and the valve body (1) in a sealing way;
The upper end of the valve rod (4) is connected with a hexagonal nut (8) in a threaded mode, and the hexagonal nut (8) is in compression fit with the compression ring (5-3).
4. An auxiliary sealing valve according to claim 3, characterized in that a double-layer butterfly-shaped spring piece (9) is arranged between the hexagonal nut (8) and the compression ring (5-3).
5. An auxiliary sealing valve according to claim 1, characterized in that the top of the valve stem (4) is provided with a handle (10).
6. The auxiliary sealing valve according to claim 1, wherein valve seats (6) are arranged on two sides of the ball body (3), and an elastic groove (6-1) is arranged on one side, away from the ball body (3), of the valve seat (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520103031.3U CN223725570U (en) | 2025-01-16 | 2025-01-16 | Auxiliary sealing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520103031.3U CN223725570U (en) | 2025-01-16 | 2025-01-16 | Auxiliary sealing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223725570U true CN223725570U (en) | 2025-12-26 |
Family
ID=98136153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202520103031.3U Active CN223725570U (en) | 2025-01-16 | 2025-01-16 | Auxiliary sealing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223725570U (en) |
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2025
- 2025-01-16 CN CN202520103031.3U patent/CN223725570U/en active Active
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