CN201963895U - Labyrinth-type stop valve - Google Patents
Labyrinth-type stop valve Download PDFInfo
- Publication number
- CN201963895U CN201963895U CN2011200628864U CN201120062886U CN201963895U CN 201963895 U CN201963895 U CN 201963895U CN 2011200628864 U CN2011200628864 U CN 2011200628864U CN 201120062886 U CN201120062886 U CN 201120062886U CN 201963895 U CN201963895 U CN 201963895U
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- China
- Prior art keywords
- valve
- labyrinth
- stop valve
- core bag
- valve body
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- Expired - Fee Related
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Abstract
The utility model relates to a labyrinth-type stop valve. The stop valve comprises a valve body and a valve core positioned in the valve body. A detachable valve seat is arrange din the valve body. A labyrinth core pocket is sleeved on the valve core. The bottom of the labyrinth core pocket is pressed against the valve seat. The top of the labyrinth core pocket is in contact with the lower surface of a labyrinth core pocket nut. The upper surface of the labyrinth core pocket nut is in contact with a bonnet. A self-sealing ring is arranged between the bonnet and the valve body. After the stop valve is adopted, the sealing performance and the switching times under the condition of various pressure classes are ensured and a sealing surface can be well protected. Meanwhile, once the sealing surface is damaged, the valve core and the valve seat can be replaced on the site, so that the maintenance workload of the valve is reduced.
Description
Technical field
The utility model relates to stop valve, specially refers to a kind of using in the steam-water pipe, to the stop valve of under the High Pressure Difference operating mode sealing surface being protected.
Background technique
In the prior art, the stop valve that uses in the steam-water pipe generally is to meet GB GB12233-2006.Its structural design as shown in Figure 1, the stop valve of this type is valve body and valve seat integral structure.Specifically be that the bottom of spool 2` is butted on the valve seat in the part of valve seat as valve body 1`, and the top of bonnet is the selfsealings circle.If damaging appears in valve seat, just the part of valve body 1` is damaged, even other positions are excellent, also can the sealing of valve seat place go wrong, and has to change whole valve body.
The stop valve of said structure in use, particularly under the High Pressure Difference operating mode, valve switch will cause the valve closing imprecision several times.The generation close reason that is not closed completely is that spool in the stop valve and sealing surface of seat destroy, and finally cause valve to change.Therefore, the stop valve of above-mentioned prior art has two defectives: the one, and the valve of this integral structure, in case spool, sealing surface of seat destroy seriously in the valve, the scene can't be repaired; The 2nd, this integral structure valve because valve seat and valve body are overall structure, when valve causes the distortion of valve housing because of the variation of medium temperature in use, will have influence on valve seat itself, and then can cause spool and valve seat to be not closed completely and leak.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that above-mentioned stop valve of the prior art exists, and a kind of stop valve of new structural type is provided.Stop valve of the present utility model is applied under the High Pressure Difference operating mode, play effective protection sealing surface, has good sealing property, and will overhaul conveniently, and maintenance cost is low.
In order to reach the foregoing invention purpose, the technological scheme that the utility model provides is as follows:
A kind of mazy stop valve, this stop valve includes valve body and is positioned at the spool of valve body, it is characterized in that, be provided with a dismountable valve seat in the described valve body, at valve core upper sleeve labyrinth core bag is arranged, the bottom of this labyrinth core bag is butted on the described valve seat, and the top of labyrinth core bag contacts with the lower surface of labyrinth core bag nut, described labyrinth core bag nut upper surface is contacted with described bonnet, is provided with the selfsealings circle between this bonnet and the valve body.
In stop valve of the present utility model, be provided with a valve seat insert between described valve seat and the valve body.
In stop valve of the present utility model, the outer wall of described labyrinth core bag nut is provided with screw thread, adopts between described sealed core bag nut and the valve body to be threaded.
In stop valve of the present utility model, described labyrinth core bag is a tubular sleeve pipe, and the sidewall of this tubular sleeve pipe is provided with a plurality of channel layers, all is symmetrically arranged with a plurality of labyrinth channels in each channel layer.
In stop valve of the present utility model, described mazy passage is the passage with the bending of a plurality of right angles, and the two ends of this passage are communicated with the inner and outer wall of tubular sleeve pipe respectively.
This novel practical structure by valve in use when being shown in an open position, medium through the multistage throttle step-down of labyrinth channel, is eliminated cavitation during by labyrinth core bag, has avoided washing away spool.In the valve closing process, also can play same effect.When the ring joint chute that designs on the spool reaches throttling again and step-down during by valve seat, form throttleng surface and sealing surface separately, thereby protected sealing surface.Valve seat and make as the labyrinth core bag of Sealing and to cause the distortion of valve housing can not have influence on valve seat because of the variation of medium temperature in use when valve simultaneously.Thereby it is tighter convenient with maintenance to reach valve closing.
Based on technique scheme, mazy stop valve of the present utility model compared with prior art has following technique effect:
Stop valve of the present utility model guarantees sealability and the switch number of times under the situation of various pressure ratings, and can protect sealing surface, if in case simultaneously sealing surface destroy and can change spool and valve seat at the scene again, reduce the maintenance workload of valve.
Description of drawings
Fig. 1 is the structural representation that meets the stop valve of GB GB12233-2006 in the prior art.
Fig. 2 is the structural representation of mazy stop valve in the utility model.
Fig. 3 be in the mazy type stop valve of the present utility model labyrinth core bag face cross-sectional view.
Fig. 4 is the I-I cross sectional representation of labyrinth core bag in the mazy type stop valve of the present utility model.
Embodiment
Below we come mazy type stop valve of the present utility model is described in further detail with specific embodiment in conjunction with the accompanying drawings; in the hope of understanding structure of the present utility model and using process more cheer and brightly, but can not limit protection domain of the present utility model with this.
Please see Figure 2, Fig. 2 is the structural representation of mazy stop valve in the utility model.As seen from the figure, mazy stop valve of the present utility model is structurally the same with other stop valves, all includes valve body 1 and the spool 5 that is positioned at valve body.The structure that best embodies the utility model characteristics is to be provided with a dismountable valve seat 2 in the valve body 1 of stop valve.The valve seat that employing can be dismantled design can solve the replaceable problem of the valve seat that common self-sealing high-temp high pressure valve can't realize, but also can guarantee that the self sealing valve sealing surface of seat destroys the time, can change valve seat at the scene, reduce the maintenance workload of valve, improve valve working life greatly, reached the purpose of energy saving.
In stop valve structure of the present utility model, on spool 5, be with a labyrinth core bag 3, the bottom of this labyrinth core bag 3 is butted on the described valve seat 2, the top of labyrinth core bag 3 contacts with the lower surface of labyrinth core bag nut 4, described labyrinth core bag nut 4 upper surfaces are contacted with described bonnet 6, are provided with the selfsealings circle between this bonnet 6 and the valve body 1.
In stop valve of the present utility model, be provided with a valve seat insert 7 between described valve seat 2 and the valve body 1.
In stop valve of the present utility model, the outer wall of described labyrinth core bag nut 4 is provided with screw thread, adopts between described sealed core bag nut 4 and the valve body 1 to be threaded.
In stop valve of the present utility model, described labyrinth core bag 3 is a tubular sleeve pipe, and the sidewall of this tubular sleeve pipe is provided with a plurality of channel layers, all is symmetrically arranged with a plurality of labyrinth channels 31 in each channel layer.
In stop valve of the present utility model, described mazy passage 31 is for having the passage of a plurality of right angles bending, and the two ends of this passage are communicated with the inner and outer wall of tubular sleeve pipe respectively.
The stop valve of the utility model structural design is consistent from sealing principle with stop valve the GB GB12233-2006, but the valve of the utility model structural design has solved the leakproofness of washing away and sealing of the switching process mesohigh difference medium of valve to spool, valve seat, solved simultaneously the valve internals with transsexual.
The utility model combines the characteristics of modulating valve structure and stop valve structure, draws advantage separately, has overcome their shortcoming.When having guaranteed the valve seal performance, protect sealing surface not washed away again, solved the replaceable of GB GB12233-2006 seat of stop valve simultaneously again.
More than show and described basic principle of the present utility model and major character and advantage of the present utility model; that describes in the restriction that the technician of valve industry should understand, the utility model is not subjected to above-mentioned enforcement, above-mentioned enforcement and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. mazy stop valve, this stop valve includes valve body and is positioned at the spool of valve body, it is characterized in that, be provided with a dismountable valve seat in the described valve body, at valve core upper sleeve labyrinth core bag is arranged, the bottom of this labyrinth core bag is butted on the described valve seat, and the top of labyrinth core bag contacts with the lower surface of labyrinth core bag nut, described labyrinth core bag nut upper surface is contacted with described bonnet, is provided with the selfsealings circle between this bonnet and the valve body.
2. a kind of mazy stop valve according to claim 1 is characterized in that, is provided with a valve seat insert between described valve seat and the valve body.
3. a kind of mazy stop valve according to claim 1 is characterized in that, the outer wall of described labyrinth core bag nut is provided with screw thread, adopts between described sealed core bag nut and the valve body to be threaded.
4. a kind of mazy stop valve according to claim 1 is characterized in that, described labyrinth core bag is a tubular sleeve pipe, and the sidewall of this tubular sleeve pipe is provided with a plurality of channel layers, all is symmetrically arranged with a plurality of labyrinth channels in each channel layer.
5. a kind of mazy stop valve according to claim 4 is characterized in that, described mazy passage is the passage with the bending of a plurality of right angles, and the two ends of this passage are communicated with the inner and outer wall of tubular sleeve pipe respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200628864U CN201963895U (en) | 2011-03-11 | 2011-03-11 | Labyrinth-type stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200628864U CN201963895U (en) | 2011-03-11 | 2011-03-11 | Labyrinth-type stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201963895U true CN201963895U (en) | 2011-09-07 |
Family
ID=44526431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200628864U Expired - Fee Related CN201963895U (en) | 2011-03-11 | 2011-03-11 | Labyrinth-type stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201963895U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103946613A (en) * | 2012-06-27 | 2014-07-23 | Sdd株式会社 | Device for reducing pressure and velocity of flowing fluid |
| CN106439206A (en) * | 2016-11-08 | 2017-02-22 | 上海发电设备成套设计研究院 | Structure preventing washing erosion of sealing face of high-pressure adjusting valve |
| CN113898754A (en) * | 2020-07-06 | 2022-01-07 | 上海大通仪表有限公司 | PCV relief valve that overhauls on line |
-
2011
- 2011-03-11 CN CN2011200628864U patent/CN201963895U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103946613A (en) * | 2012-06-27 | 2014-07-23 | Sdd株式会社 | Device for reducing pressure and velocity of flowing fluid |
| CN106439206A (en) * | 2016-11-08 | 2017-02-22 | 上海发电设备成套设计研究院 | Structure preventing washing erosion of sealing face of high-pressure adjusting valve |
| CN113898754A (en) * | 2020-07-06 | 2022-01-07 | 上海大通仪表有限公司 | PCV relief valve that overhauls on line |
| CN113898754B (en) * | 2020-07-06 | 2024-08-23 | 上海大通仪表有限公司 | PCV release valve for on-line maintenance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20180311 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |