CN220930233U - Axial automatic adjusting compensation sealing structure of plug valve - Google Patents
Axial automatic adjusting compensation sealing structure of plug valve Download PDFInfo
- Publication number
- CN220930233U CN220930233U CN202322618395.9U CN202322618395U CN220930233U CN 220930233 U CN220930233 U CN 220930233U CN 202322618395 U CN202322618395 U CN 202322618395U CN 220930233 U CN220930233 U CN 220930233U
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- valve
- cock
- hole
- plug
- valve body
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- 238000007789 sealing Methods 0.000 title claims abstract description 43
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
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- Taps Or Cocks (AREA)
Abstract
The utility model relates to the technical field of valves, in particular to an axial automatic adjusting compensation sealing structure of a plug valve, which comprises a valve body and a plug, wherein the plug is arranged in the valve body, and the upper part of the plug is connected with a valve rod, and is characterized in that: the valve cover is fixedly connected with the valve body, a through hole I is formed in the middle of the valve cover, the valve rod penetrates through the through hole I, an adjusting cushion block is arranged below the valve cover, a wave spring is arranged between the top of the cock and the adjusting cushion block, a sealing ring is arranged below the through hole I, and the sealing ring is sleeved outside the valve rod. Compared with the prior art, the wave spring is added above the cock, so that the contact area of the cock and the adjusting pressing plate is reduced, and the opening and closing moment is reduced. Meanwhile, the spring force can compensate the acting force of the sealing pair under the condition of cock abrasion, the service life of the sealing surface is prolonged, and the axial automatic adjustment and compensation sealing function is realized.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to an axial automatic adjusting compensation sealing structure of a plug valve.
Background
The plug valve is a through valve which is opened and closed quickly, a plug body with a hole is used as an opening and closing piece, and the plug body rotates along with a valve rod so as to realize opening and closing actions. Since the movement between the tap sealing surfaces has a wiping action, and contact with the flowing medium is completely prevented at full opening, it can also be used for media with suspended particles in general. The plug body of the plug valve is a cone and is also a cylinder, and the plug body is matched with the hole surface of the valve body to form a sealing pair. The common plug valve is sealed by the direct contact between the finished metal plug body and the valve body, so that the sealing property is poor, the opening and closing force is high, and the wear is easy. And the conical surface grinding processing is difficult, the sealing is difficult to ensure, and the maintenance is difficult after the abrasion.
Disclosure of Invention
The utility model provides an axial automatic adjusting compensation sealing structure of a plug valve, which aims to overcome the defects of the prior art.
In order to achieve the above purpose, the axial automatic adjusting compensation sealing structure of the plug valve comprises a valve body and a plug, wherein the plug is arranged in the valve body, and the upper part of the plug is connected with a valve rod, and is characterized in that: the valve cover is fixedly connected with the valve body, a through hole I is formed in the middle of the valve cover, the valve rod penetrates through the through hole I, an adjusting cushion block is arranged below the valve cover, a wave spring is arranged between the top of the cock and the adjusting cushion block, a sealing ring is arranged below the through hole I, and the sealing ring is sleeved outside the valve rod.
And a second through hole is formed in the middle of the adjusting cushion block, and a boss is arranged above the edge of the adjusting cushion block, which is close to the second through hole.
The sealing ring is a triangular sealing ring, a chamfer is machined below the through hole in the middle of the valve cover, and the sealing ring is embedded into the chamfer.
A bushing is arranged between the cock and the valve body, and the bushing is fixed with the valve body.
The valve body is provided with a redundant space below the cock.
Compared with the prior art, the utility model reduces the contact area between the cock and the adjusting pressing plate by adding the wave spring above the cock, thereby reducing the opening and closing moment. Meanwhile, the spring force can compensate the acting force of the sealing pair under the condition of cock abrasion, the service life of the sealing surface is prolonged, and the axial automatic adjustment and compensation sealing function is realized.
Drawings
FIG. 1 is a schematic diagram of the present utility model.
Fig. 2 is an enlarged view of the present utility model.
Referring to fig. 1-2, wherein 1 is a valve body, 2 is a cock, 3 is a valve stem, 4 is a valve cover, 4-1 is a through hole one, 5 is an adjusting cushion block, 5-1 is a through hole two, 5-2 is a boss, 6 is a sealing ring, 7 is a wave spring, and 8 is a bushing.
Description of the embodiments
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1-2, a valve cover 4 is arranged above the cock 2, the valve cover 4 is fixedly connected with the valve body 1, a through hole I is formed in the middle of the valve cover 4, the valve rod 3 penetrates through the through hole I4-1, an adjusting cushion block 5 is arranged below the valve cover 4, a wave spring 7 is arranged between the top of the cock 2 and the adjusting cushion block 5, a sealing ring 6 is arranged below the through hole I4-1, and the sealing ring 6 is sleeved outside the valve rod 3. The wave spring 7 is arranged to generate elastic pretightening force between the valve body 1 and the cock 2, the cock 2 can move up and down, the function of axial automatic adjustment and compensation sealing is realized, the contact area between the cock 2 and the adjusting cushion block 5 is reduced, and the opening and closing moment of the valve is greatly reduced.
The middle of the adjusting cushion block 5 is provided with a second through hole 5-1, and a boss 5-2 is arranged above the edge of the adjusting cushion block 5, which is close to the second through hole 5-1. The valve rod 1 passes through the second through hole 5-1, and the boss 5-2 presses the sealing ring 6 upwards.
The sealing ring 6 is a triangular sealing ring, a chamfer is machined below the first through hole 4-1 in the middle of the valve cover 4, and the sealing ring 6 is embedded into the chamfer. The wave spring 7 makes the adjusting cushion block embed the sealing ring 6 between the valve rod 3 and the valve cover 4 along the chamfer by the reaction force applied upwards by the adjusting cushion block 5, so as to enhance the sealing effect of the sealing ring 6 and prevent the medium in the valve cavity from penetrating upwards through the valve rod.
A bushing 8 is arranged between the cock 2 and the valve body 1, and the bushing 8 is fixed with the valve body 1. The bushing 8 is in friction seal with the tap 2, reducing wear of the valve body 1.
The valve body 1 is provided with a redundant space below the tap 2. After the tap 2 wears, the tap 2 can move to the redundant space below under the action of the wave spring 7, and the sealing of the tap 2 is ensured under the pressure of the wave spring 7.
When the valve is used, when the valve is opened, the pressure at the upstream of the pipeline is released, after the pressure in the lower cavity of the valve body 1 is balanced with the pressure of a pipeline medium, the lower cavity of the valve body 1 is acted by the pressure to push the cock 2 to move upwards, the wave spring 7 firstly releases the downward pressing force, so that the bulge of the adjusting cushion block 5 is pressed against the sealing ring 6 upwards, and the medium in the valve cavity cannot permeate upwards; when the valve is closed, the downstream pipeline can form a cavity state, the cock 2 can move downwards under the combined action of upstream pressure and downstream vacuumizing tension, the wave spring 7 enhances the pressing force between the cock 2 and the bushing 6, the sealing effect of the cock 2 and the bushing 6 is ensured not to be influenced by abrasion of a sealing surface, and the automatic compensation function is realized.
Claims (5)
1. The utility model provides a plug valve axial automatically regulated compensates seal structure, includes valve body (1) and cock (2), and cock (2) set up in valve body (1), and the top and the valve rod (3) of cock (2) are connected, its characterized in that: the valve is characterized in that a valve cover (4) is arranged above the cock (2), the valve cover (4) is fixedly connected with the valve body (1), a first through hole is formed in the middle of the valve cover (4), the valve rod (3) penetrates through the first through hole (4-1), an adjusting cushion block (5) is arranged below the valve cover (4), a wave spring (7) is arranged between the top of the cock (2) and the adjusting cushion block (5), a sealing ring (6) is arranged below the first through hole (4-1), and the sealing ring (6) is sleeved outside the valve rod (3).
2. The plug valve axial automatic adjustment compensating seal structure according to claim 1, wherein: the middle of the adjusting cushion block (5) is provided with a second through hole (5-1), and a boss (5-2) is arranged above the edge of the adjusting cushion block (5) close to the second through hole (5-1).
3. The plug valve axial automatic adjustment compensating seal structure according to claim 1, wherein: the sealing ring (6) is a triangular sealing ring, a chamfer is machined below the first through hole (4-1) in the middle of the valve cover (4), and the sealing ring (6) is embedded into the chamfer.
4. The plug valve axial automatic adjustment compensating seal structure according to claim 1, wherein: a bushing (8) is arranged between the cock (2) and the valve body (1), and the bushing (8) is fixed with the valve body (1).
5. The plug valve axial automatic adjustment compensating seal structure according to claim 1, wherein: the valve body (1) is provided with a redundant space below the cock (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322618395.9U CN220930233U (en) | 2023-09-26 | 2023-09-26 | Axial automatic adjusting compensation sealing structure of plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322618395.9U CN220930233U (en) | 2023-09-26 | 2023-09-26 | Axial automatic adjusting compensation sealing structure of plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220930233U true CN220930233U (en) | 2024-05-10 |
Family
ID=90969154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322618395.9U Active CN220930233U (en) | 2023-09-26 | 2023-09-26 | Axial automatic adjusting compensation sealing structure of plug valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220930233U (en) |
-
2023
- 2023-09-26 CN CN202322618395.9U patent/CN220930233U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |