CN207161751U - A kind of multi-sealed adjustable plug valve - Google Patents
A kind of multi-sealed adjustable plug valve Download PDFInfo
- Publication number
- CN207161751U CN207161751U CN201720994647.XU CN201720994647U CN207161751U CN 207161751 U CN207161751 U CN 207161751U CN 201720994647 U CN201720994647 U CN 201720994647U CN 207161751 U CN207161751 U CN 207161751U
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- China
- Prior art keywords
- valve body
- valve
- cock
- bonnet
- sealing mechanism
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Abstract
The utility model proposes a kind of multi-sealed adjustable plug valve, including valve body, bonnet, cock stem, the bonnet is located on the valve body, and cock is connected with the cock stem and is stretched in through the bonnet in the valve body, the first sealing mechanism is provided between the cock and the valve body；The valve body at valve body pressing with being provided with indent; graphite annulus is provided with the indent; the graphite annulus is provided with the second sealing mechanism, and this valve has two independent sealing systems to provide the duplicate protection for preventing external leakage, meets the experiment of valve stem seal fire safety evaluating, the experiment of valve bonnet seal fire safety evaluating again.This is all inaccessiable sealing effectiveness of conventional structure plug valve, greatly prolongs valve service life.
Description
Technical field
It the utility model is related to valve field, more particularly to multi-sealed adjustable plug valve.
Background technology
Stopcock structure is simple, and switch is rapid, and fluid resistance is small, and angle stroke operation is fast, can be fast under the accident state of emergency
The advantages that cut-out pipeline of speed, is widely used.But conventional plug valve sealing structure is simple, easily leakage, close in order to allow
Seal it is relatively reliable, from multi-sealed structure, it is ensured that effective sealing of medium.
Utility model content
In order to solve the above technical problems, the utility model proposes a kind of multi-sealed adjustable plug valve, including valve
Body, bonnet, cock stem, the bonnet are located on the valve body, and cock is connected with the cock stem and is stretched through the bonnet
In in the valve body, the first sealing mechanism is provided between the cock and the valve body；The valve body at valve body pressing with being provided with
Indent, the indent is interior to be provided with graphite annulus, and the graphite annulus is provided with the second sealing mechanism.
Preferably, first sealing mechanism is wrapped in the polytetrafluoroethylene bushing outside the cock, and is bonded
In the valve body.
Preferably, second sealing mechanism includes cambridge ring, the poly tetrafluoroethylene being once placed on the cock stem
Piece, metallic membrane, thrust ring；The bonnet is provided with adjusting screw, and the adjusting screw is pressed on thrust ring.
Preferably, the section of the cambridge ring is wedge shape, and is fitted between the cock stem and bonnet.
The utility model proposes multi-sealed adjustable plug valve have following beneficial effect：This valve has two independences
Sealing system provide and prevent the duplicate protection of external leakage, meet the safety test of cock stem sealing fire, valve bonnet seal fire again
Safety test.This is all inaccessiable sealing effectiveness of conventional structure plug valve, greatly prolongs valve service life.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly described.
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the schematic diagram of A in Fig. 1；
Wherein, 1- valve bodies, 2- bonnets, 3- cock stems, 4- cocks, 5- polytetrafluoroethylene bushings, 6- cambridge rings, 7- polytetrafluoros
Ethene diaphragm, 8- metallic membranes, 9- thrust rings, 10- adjusting screws, 11- graphite annulus.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe.
As shown in Figure 1 and Figure 2, the utility model proposes a kind of multi-sealed adjustable plug valve, including valve body 1, valve
Lid 2, cock stem 3, the bonnet 2 are located on the valve body 1, and cock 4 is connected with the cock stem 3 and passes through the bonnet 2
Stretch in the valve body 1, the first sealing mechanism is provided between the cock 4 and the valve body 1；The valve body 1 presses with valve body 1
Place is provided with indent, and graphite annulus 11 is provided with the indent, and the graphite annulus 11 is provided with the second sealing mechanism, first sealing
Mechanism is wrapped in the polytetrafluoroethylene bushing 5 outside the cock 4, and in fitting and the valve body, polytetrafluoroethylene (PTFE) lining
Set 5；Two-stage sealing is provided by polytetrafluoroethylene (PTFE) cambridge ring 6, diaphragm and metallic membrane 8, if tetrafluoroethene cambridge ring 6 is fiery
Burn, metallic membrane 8 remains to maintain its sealing；Graphite annulus 11 is compressed between valve body 1 and bonnet 2 to seal, it is close even if fire occurs
Envelope remains to keep.The adjustment bolt of simply rotary top is only needed in addition, and the seal pressure of cock 4 and bushing can be kept to protect
Demonstrate,prove the long-term use of valve.Two independent sealing systems provide the duplicate protection for preventing external leakage.
Such an arrangement provides a complete on-line control internal leakage and dual cock stem to seal, and sealing is relatively reliable, changes
The performance of kind valve, exempt unplanned stopping production and maintenance time and valve service life can be greatly prolonged.
Preferably, second sealing mechanism includes cambridge ring 6, the polytetrafluoroethylene (PTFE) being once placed on the cock stem 3
Diaphragm 7, metallic membrane 8, thrust ring 9；The bonnet 2 is provided with adjusting screw 10, and the adjusting screw 10 is pressed on thrust ring 9
On, PTFE bushings are pressed into valve body 1 and ensure that PTFE bushings do not hinder the passage of valve body 1, dress cock 4 coordinates to PTFE bushings,
Graphite annulus 11 is put into the groove of valve body 1, and cambridge ring 6, polytetrafluoroethylene diaphragm 7, metallic membrane 8, thrust ring 9 are enclosed on into cock successively
On bar 3, connect valve body 1 and bonnet 2 with screw bolt and nut and compress the sealing of the keeping body lid of graphite annulus 11.Finally by stubborn adjustment spiral shell
Bolt presses cambridge ring 6, and polytetrafluoroethylene diaphragm 7 deforms them and is close to cock stem guarantee sealing, and the section of the cambridge ring 6 is wedge
Shape, and fit between the cock stem and bonnet 2.
A variety of modifications to embodiment will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (4)
1. a kind of multi-sealed adjustable plug valve, including valve body, bonnet, cock stem, the bonnet is located on the valve body,
Cock is connected with the cock stem and is stretched in through the bonnet in the valve body, it is characterised in that the cock with it is described
The first sealing mechanism is provided between valve body；The valve body is provided with graphite annulus, institute with being provided with indent at valve body pressing in the indent
State graphite annulus and be provided with the second sealing mechanism.
2. multi-sealed adjustable plug valve according to claim 1, it is characterised in that the first sealing mechanism bag
The polytetrafluoroethylene bushing being wrapped in outside the cock is included, and in fitting and the valve body.
3. multi-sealed adjustable plug valve according to claim 1, it is characterised in that the second sealing mechanism bag
Include the cambridge ring being once placed on the cock stem, polytetrafluoroethylene diaphragm, metallic membrane, thrust ring；The bonnet is provided with
Adjusting screw, the adjusting screw are pressed on thrust ring.
4. multi-sealed adjustable plug valve according to claim 3, it is characterised in that the section of the cambridge ring is
Wedge shape, and fit between the cock stem and bonnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720994647.XU CN207161751U (en) | 2017-08-10 | 2017-08-10 | A kind of multi-sealed adjustable plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720994647.XU CN207161751U (en) | 2017-08-10 | 2017-08-10 | A kind of multi-sealed adjustable plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207161751U true CN207161751U (en) | 2018-03-30 |
Family
ID=61716434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720994647.XU Active CN207161751U (en) | 2017-08-10 | 2017-08-10 | A kind of multi-sealed adjustable plug valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207161751U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644403A (en) * | 2018-07-20 | 2018-10-12 | 浙江万龙机械有限公司 | A kind of double sealing structure of plug valve |
-
2017
- 2017-08-10 CN CN201720994647.XU patent/CN207161751U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644403A (en) * | 2018-07-20 | 2018-10-12 | 浙江万龙机械有限公司 | A kind of double sealing structure of plug valve |
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