CN209229046U - A kind of anti-gasification plug valve of spy's material - Google Patents
A kind of anti-gasification plug valve of spy's material Download PDFInfo
- Publication number
- CN209229046U CN209229046U CN201821704215.1U CN201821704215U CN209229046U CN 209229046 U CN209229046 U CN 209229046U CN 201821704215 U CN201821704215 U CN 201821704215U CN 209229046 U CN209229046 U CN 209229046U
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- valve
- cock
- gasification
- flow channels
- spy
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Abstract
The utility model discloses a kind of anti-gasification plug valves of special material, comprising: valve body is internally provided with valve chamber and the upstream passageway being connected to valve chamber and downstream passage；Cock is pivotally mounted to valve chamber relative to valve body, has flow channels；Flow channels on or off upstream passageway and downstream passage in rotary course；Cock is seal-installed on valve chamber by being located at two sealing structures of flow channels or more two sides, and the outboard chambers of corresponding two sealing structures of valve chamber are respectively epicoele and cavity of resorption；Balance channel, is set to cock, conducting epicoele and upstream passageway and cavity of resorption and upstream passageway when cock is rotated to scram position.By the way that balance channel is arranged in cock, when cock turns to the position for turning off flow channels, epicoele and cavity of resorption are connected with the upstream passageway of valve body, thus the problem of balancing the pressure of epicoele and cavity of resorption, can leading to valve invalidation because of medium gasification with the epicoele of effective solution valve body and cavity of resorption.
Description
Technical field
The utility model relates to industrial valve technical fields, and in particular to a kind of anti-gasification plug valve of spy's material.
Background technique
Because plug valve generallys use venturi type structure, runner does not have dead angle, and medium is usually to be not easy to deposit.For toxic
The operating condition medium of fugacity, plug valve are also that a kind of ideal valve of pipeline control medium has when line temperature appearance exception
A little medium is gone in the cavity up and down of valve, and it is excessively high that the medium gasification leaked into upper and lower cavity will lead to pressure, to hold
Easily leading to makes the sealing structure between valve rod and valve deck fail.
Utility model content
Therefore, the technical problem to be solved by the present invention is to overcome the valve chamber of plug valve in the prior art because of inside
Medium, which gasifies, leads to the defect of valve invalidation, to provide a kind of special material anti-gasification plug valve.
In order to solve the above technical problems, the technical solution of the utility model is as follows:
A kind of anti-gasification plug valve of spy's material, comprising:
Valve body is internally provided with valve chamber and the upstream passageway being connected to the valve chamber and downstream passage；
Cock is pivotally mounted to the valve chamber relative to the valve body, has flow channels；Mistake described in rotary course
Upstream passageway described in circulation road on or off and the downstream passage；The cock is by being located at the flow channels or more two
Two sealing structures of side are seal-installed on the valve chamber, on the outboard chambers of corresponding two sealing structures of the valve chamber are respectively
Chamber and cavity of resorption；
Balance channel, is set to the cock, the cock be connected when rotating to scram position the epicoele and it is described on
Swim channel and the cavity of resorption and the upstream passageway.
It preferably, towards the part of the upstream passageway is input end, the balance when cock goes to scram position
Channel include the cock upper opening being connected to the epicoele opened up, the under shed being connected to the cavity of resorption and be located at institute
The side opening for stating input end, further include the connection upper opening and the side opening of cock setting and be connected to it is described under
The channel of opening and the side opening.
Preferably, the balance channel includes:
Upper balancing segment is arranged at the top of the cock, for being connected to the flow channels and the epicoele；
Lower balancing segment is arranged in the cock bottom, for being connected to the flow channels and the cavity of resorption；
The input end of the cock is arranged in middle balancing segment, and the overcurrent is connected to when the cock goes to scram position
Channel and the upstream passageway.
It preferably, further include valve rod that lower end connect with the cock, drove cock rotation, the valve body corresponds to institute
The top for stating valve chamber has top opening, and the top opening is equipped with the valve deck for being buckled in the valve body, and the valve rod is arranged in
Gap setting between the valve deck, with the valve deck has for airtight and watertight padding letter.
Preferably, the roughness that the valve rod corresponds to the stuffing-box position is less than or equal to 0.8Ra；The valve deck is corresponding
The roughness of the stuffing-box position is less than or equal to 1.6Ra.
Preferably, the valve body and the valve deck correspond to the valve chamber periphery and are provided with middle part sealing, and the valve deck is pressed in
On the sealing surface of the middle part sealing.
Preferably, the middle part is sealed into metal graphite spiral wound gasket.
Preferably, the sealing surface that the valve deck is pressed in the metal graphite spiral wound gasket has fine groove waterline.
Technical solutions of the utility model have the advantages that
1. the anti-gasification plug valve of spy's material provided by the utility model, by the way that balance channel is arranged in cock, when cock turns
When moving the position for turning off flow channels, epicoele and cavity of resorption are connected with the upstream passageway of valve body, to balance epicoele under
The pressure of chamber, the problem of valve invalidation being led to because of medium gasification with the epicoele of effective solution valve body and cavity of resorption.
2. the anti-gasification plug valve of spy's material provided by the utility model, middle part sealing is using elasticity preferably metallic graphite carbon winding
Gasket seals relatively reliable compared with common metal graphite Composition spacer.
3. the anti-gasification plug valve of spy's material provided by the utility model, valve deck, which is pressed in the sealing surface that middle part seals, has fine groove water
Line achievees the purpose that sealing so that not having leakage path at contact surface.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the cross-sectional view of the plug valve provided in the first embodiment of the utility model；
Fig. 2 is the front view of the cock of plug valve shown in FIG. 1；
Fig. 3 is the cross-sectional view of the cock of plug valve shown in FIG. 1；
Fig. 4 is the structural schematic diagram of valve deck in the utility model embodiment.
Appended drawing reference: 1, valve body；11, upstream passageway；12, downstream passage；2, valve rod；3, cock；31, upper balancing segment；
32, middle balancing segment；33, lower balancing segment；34, flow channels；4, sealing structure；5, valve deck；6, stuffing-box；7, middle part seals.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict can be combined with each other.
With reference to Fig. 1-4, a kind of anti-gasification plug valve of spy's material, including valve body 1, cock 3, valve rod 2 and valve deck 5.Valve body 1
Be internally provided with valve chamber and the upstream passageway being connected to valve chamber 11 and downstream passage 12.Cock 3 has flow channels 34, and
Two sealing structures 4 by being located at about 34 two sides of flow channels are rotatablely installed in valve chamber, and valve chamber corresponds to two sealing structures 4
Outboard chambers are respectively epicoele and cavity of resorption.It is provided with balance channel in cock 3, when the rotation of cock 3 to scram position, balance
Channel conductive epicoele and upstream passageway 11 and cavity of resorption and upstream passageway 11, thus balance epicoele and under intracavitary pressure, can be with
The problem of epicoele and cavity of resorption of effective solution valve body 1 lead to valve invalidation because of medium gasification.
It towards the part of upstream passageway 11 is input end when cock 3 goes to scram position, balance channel includes being provided with rotation
The upper opening being connected on 3 with epicoele, the under shed being connected to cavity of resorption and the side opening positioned at input end are filled in, upper opening passes through upper
Balancing segment 31 and flow channels 34 are connected, and under shed is connected by lower balancing segment 33 with flow channels 34, side opening pass through in put down
Weighing apparatus end 32 and flow channels 24 are connected.When cock 3 goes to scram position, epicoele and cavity of resorption connect with upstream passageway 11 respectively
It is logical, to balance epicoele pressure intracavitary under.
It is designed in this way, when the rotation of cock 3 to scram position, 34 both ends of flow channels are blocked, in balance channel conducting
Chamber and upstream passageway 11 and cavity of resorption and upstream passageway 11, so that epicoele pressure intracavitary under is balanced, it can be with effective solution
The problem of epicoele and cavity of resorption of valve body 1 lead to valve invalidation because of medium gasification.
Balance channel includes: that 3 top of cock, the upper balancing segment 31 for being connected to flow channels 34 and epicoele is arranged in；If
It sets in 3 bottom of cock, the lower balancing segment 33 for being connected to flow channels 34 and cavity of resorption；And the input end of cock 3 is set,
The middle balancing segment 32 of flow channels 34 and upstream passageway 11 is connected to when cock 3 goes to scram position.
Position at the top of the corresponding valve chamber of valve body 1 is equipped with top opening, and valve deck 5 be located in the top opening of valve body 1, valve rod
2 are connected to the upper end of cock 3 and wear valve deck 5, and rotation valve rod 2 can drive cock 3 to rotate in valve chamber, valve rod 2 and valve deck
Gap setting between 5 has for airtight and watertight padding letter 6.The roughness of corresponding 6 position of stuffing-box of valve rod 2 is 0.8Ra, valve deck 5
The roughness of corresponding 6 position of stuffing-box is 1.6Ra, it is possible to reduce the friction of valve rod 2 and valve deck 5 to stuffing-box 6.
Valve body 1 and the corresponding valve chamber periphery of valve deck 5 are provided with middle part sealing 7, and valve deck 5 is pressed in the sealing surface of middle part sealing 7
On.
In the present embodiment, middle part sealing 7 is metal graphite spiral wound gasket, and valve deck 5 is pressed in metal graphite spiral wound gasket
Sealing surface has fine groove waterline.Fine groove waterline is the trace that cutter leaves after the processing of 5 surface of valve deck, and its main function is to add
Sealing between strong valve deck 5 and metal graphite spiral wound gasket, the pressing force that bolt generates pass to metallic graphite carbon by valve deck 5 and twine
Around gasket, metal graphite spiral wound gasket is set to generate enough elastic-plastic deformations, to form rough seam on 5 surface of valve deck
Gap is filled into fine groove waterline with category graphite wound gasket piece compression and fills up compacting, so that not having leakage path at contact surface, reached
The purpose of sealing.Fine groove waterline is concentric or spiral shape serrated surface in the present embodiment.
As another embodiment, upper balancing segment 31, lower balancing segment 33 and middle balance end 32 can not circulate with mistake
Road 34 is connected, and is set to cock 3, directly conducting upper opening and side opening and under shed and side opening.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes among the protection scope created still in the utility model.
Claims (8)
1. a kind of anti-gasification plug valve of spy's material characterized by comprising
Valve body (1) is internally provided with valve chamber and the upstream passageway being connected to the valve chamber (11) and downstream passage (12)；
Cock (3) is pivotally mounted to the valve chamber relative to the valve body (1), has flow channels (34)；In rotary course
Upstream passageway (11) and the downstream passage (12) described in flow channels (34) on or off；The cock (3) passes through
Two sealing structures (4) positioned at the flow channels (34) two sides up and down are seal-installed on the valve chamber, the valve chamber corresponding two
The outboard chambers of the sealing structure (4) are respectively epicoele and cavity of resorption；
Balance channel is set to the cock (3), when cock (3) rotation to scram position be connected the epicoele with it is described
Upstream passageway (11) and the cavity of resorption and the upstream passageway (11).
2. the anti-gasification plug valve of spy's material according to claim 1, which is characterized in that the cock (3) goes to scram position
The part of upstream passageway described in Shi Chaoxiang (11) be input end, the balance channel include the cock (3) open up with it is described
The upper opening of epicoele connection, the under shed being connected to the cavity of resorption and the side opening positioned at the input end, further include described
The connection upper opening of cock (3) setting is with the side opening and is connected to the channel of the under shed Yu the side opening.
3. spy's material anti-gasification plug valve according to claim 2, which is characterized in that the balance channel includes:
Upper balancing segment (31), setting is at the top of the cock (3), for being connected to the flow channels (34) and the epicoele；
Lower balancing segment (33) is arranged in the cock (3) bottom, for being connected to the flow channels (34) and the cavity of resorption；
Middle balancing segment (32) is arranged the input end in the cock (3), is connected to institute when the cock (3) goes to scram position
State flow channels (34) and the upstream passageway (11).
4. the anti-gasification plug valve of spy's material according to claim 1, which is characterized in that further include lower end and the cock (3)
The top of the valve rod (2) for connecting, the cock (3) being driven to rotate, the corresponding valve chamber of the valve body (1) has top opening,
The top opening is equipped with the valve deck (5) for being buckled in the valve body (1), and the valve rod (2) is arranged in the valve deck (5), with institute
Stating the gap setting between valve deck (5) has for airtight and watertight padding letter (6).
5. the anti-gasification plug valve of spy's material according to claim 4, which is characterized in that the corresponding filler of the valve rod (2)
The roughness of letter (6) position is less than or equal to 0.8Ra；The roughness of corresponding stuffing-box (6) position of the valve deck (5) is less than
Or it is equal to 1.6Ra.
6. the anti-gasification plug valve of spy's material according to claim 4, which is characterized in that the valve body (1) and the valve deck (5)
The corresponding valve chamber periphery is provided with middle part and seals (7), and the valve deck (5) is pressed on the sealing surface of the middle part sealing (7).
7. the anti-gasification plug valve of spy's material according to claim 6, which is characterized in that the middle part sealing (7) is metal stone
Black spirotallic gasket.
8. the anti-gasification plug valve of spy's material according to claim 7, which is characterized in that the valve deck (5) is pressed in the metal
The sealing surface of graphite wound gasket piece has fine groove waterline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821704215.1U CN209229046U (en) | 2018-10-19 | 2018-10-19 | A kind of anti-gasification plug valve of spy's material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821704215.1U CN209229046U (en) | 2018-10-19 | 2018-10-19 | A kind of anti-gasification plug valve of spy's material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209229046U true CN209229046U (en) | 2019-08-09 |
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ID=67500503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821704215.1U Active CN209229046U (en) | 2018-10-19 | 2018-10-19 | A kind of anti-gasification plug valve of spy's material |
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| Country | Link |
|---|---|
| CN (1) | CN209229046U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469686A (en) * | 2019-09-10 | 2019-11-19 | 潘世永 | High voltagehigh frequency time occasion plug valve |
-
2018
- 2018-10-19 CN CN201821704215.1U patent/CN209229046U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469686A (en) * | 2019-09-10 | 2019-11-19 | 潘世永 | High voltagehigh frequency time occasion plug valve |
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