CN2720201Y - Flush-free stop valve - Google Patents
Flush-free stop valve Download PDFInfo
- Publication number
- CN2720201Y CN2720201Y CN 200420012056 CN200420012056U CN2720201Y CN 2720201 Y CN2720201 Y CN 2720201Y CN 200420012056 CN200420012056 CN 200420012056 CN 200420012056 U CN200420012056 U CN 200420012056U CN 2720201 Y CN2720201 Y CN 2720201Y
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- valve
- sealing surface
- groove
- utility
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- Expired - Fee Related
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Abstract
The utility model provides a flush-free stop valve, which has the main structure that both sides of a flow guiding window is in arc shape or in hemicycle shape with a certain inclination angle; a groove which fits with the upper part of a valve core is arranged at the section of the sealing surface contacting with the valve core in the center of a valve body corresponding to a valve seat, so that the sealing surface is positioned at the bottom part of the groove. The utility model can reduce the abrasion of the flow guiding window and avoid the rupture of the valve core. Furthermore, because the existence of the groove, the high pressure draft or current can be released when the valve is opened instantly and when the overflow is ready to form, which at the same time is equal to lift a flow guiding window (7), so that the valve enters into an overflowing condition promptly and the courses of decompression, dilation and acceleration of the fluid entering into a water discharging pipe line take place in the outlet of the flow guiding passage and in the pipe line at the back of the valve. Accordingly, the utility model can effectively prevent the high pressure draft and the high pressure current from abrading the sealing surface, thoroughly solves the problems of the inner leakage of the valve and the system and practically enhances the service life of the valve. The utility model has the advantages of simple and reasonable structure, reliable working performance, elegant and beautiful shape, convenient assembly, disassembly and maintenance, appropriate and marketable products, easy popularization and application, etc.
Description
Technical field: the utility model relates to the valving of a kind of power station and relevant heat supply network use, particularly relates to the valving of installing and using on a kind of boiler in the power station, the unrestrained waterpipe of steam turbine.
Background technique: its working medium of stop valve (for manually-operated gate) that is installed on power plant boiler, the unrestrained water system of steam turbine or the relevant heating power webmaster road often is in saturation state, in the upstream of this valve is High Temperature High Pressure master steam, the downstream is the development unit of negative pressure, so the fluid that enters drain water piping is in this speedup of step-down increase-volume sharp.No matter high in and low out or low in and high out, the sealing surface of this valve all will bear the impact of high-velocity fluid, air-flow is being mingled with water droplet, with high speed as the continuous sealing metal surface of knocking of bullet, make its surface metal molecule fatigue flake, produce erosion, cause leaking in this valve even the system thereby stop valve loses leakproofness very soon.For addressing this problem, a kind of wash-free stop valve is disclosed in the patent No. 01244082.5, it is to change the water conservancy diversion window into double-deck the setting by the individual layer setting on existing stop valve basis, and the wrong symmetrical structure of diversion window oral sex up and down, really increased the flowing velocity of fluid, reduced the pressure reduction of fluid inlet and outlet, the erosion that has reduced valve relatively damages.But because its water conservancy diversion window is a rectangular opening, still erosion is serious under above-mentioned high temperature, high pressure and " two-phase flow " situation for sharp corner, and long-time running can cause that spool ruptures herein, makes valve out of hand.And because the restriction on this valve arrangement still constitutes sealing surface when moment opens and be about to form overcurrent and washes away, exist erosion inevitably and damage, the leakage problem fails to be solved in making.The working life of also having reduced valve simultaneously.
Summary of the invention: the purpose of this utility model is for a kind of wash-free stop valve is provided, and mainly is to solve leakage problem in power plant boiler, the unrestrained water system of steam turbine or relevant heating power webmaster road valve and the system, and the working life that can effectively improve valve.
Scheme of the present utility model is as described below: this model utility comprises valve body, door frame, handwheel, goes up lower valve rod, shaft joint, water conservancy diversion window, spool, flexible sealing ring, pressure ring, wears pin, swing bolt and Gland,, it is by water conservancy diversion window both sides being made as semicircle or the arc-shaped structure that has certain inclination angle, and the groove that matches with spool top is set at valve body center (being equivalent to valve seat) and the contacted sealing surface of spool place, make sealing surface be positioned at that bottom portion of groove realizes.
The beneficial effect of this model utility: since this model utility take said structure, can not only reduce erosion to the water conservancy diversion window, avoid the spool fracture, and the step-down, dilatation, the speedup process that enter fluid in the unrestrained waterpipe are occurred in the outlet of guide channel and the pipeline behind the door, so just, can prevent high pressure draught and current washing away effectively to sealing surface, thoroughly solve leakage problem in valve and even the system, improve valve working life conscientiously, reliably realize goal of the invention.That this model utility also has is simple and reasonable, reliable working performance, beautiful shape is generous, dismounting is easy to maintenance, product is marketable, advantage such as easy to utilize.
Description of drawings: Fig. 1 is the overall structure schematic representation of wash-free stop valve.
Embodiment: by wash-free stop valve shown in Figure 1 is improved a kind of novel wash-free stop valve on existing wash-free stop valve basis.Wherein valve body 1 is threaded with door frame 2, and door frame 2 tops are handwheel 3, and handwheel 3 bottom centre are upper valve rod 4 fixedly, and connects lower valve rod 6 through shaft joint 5, and a tubular spool 8 that is provided with down cofferdam and water conservancy diversion window 7 is fixed in lower valve rod 6 bottoms.Water conservancy diversion window 7 both sides of this spool 8 are semicircle or the circular arc that has certain inclination angle, and water conservancy diversion window 7 is double-deck interlaced arrangement between the upper and lower layers to be set.Be provided with the groove 9 that matches with spool 8 tops at valve body 1 center (being equivalent to valve seat) with spool 8 contacted sealing surface places in addition, make sealing surface be positioned at groove 9 bottoms.Lower valve rod 6 outsides in valve body 1 inside are provided with flexible sealing ring 10, are pressure rings 11 at the top of flexible sealing ring 10, and by door frame 2 both sides wear pin 12 and swing bolt 13 fixedly Gland 14 constitute.
When this model utility is closed, whole spool top is promptly gone up the cofferdam and is fallen into fully in the groove 9, the gap is very little again, sealing surface is quite tight, when valve moment opens and is about to form overcurrent, because the existence of groove 9 makes high pressure draught or current obtain slowly-releasing at this on the one hand, equal simultaneously and will carry on the water conservancy diversion window 7, thus so just make valve enter rapidly over-current state realized sealing surface exempt from wash away.
Claims (1)
1, a kind of wash-free stop valve, comprise valve body (1), door frame (2), handwheel (3), go up lower valve rod (4,6), shaft joint (5), water conservancy diversion window (7), spool (8) flexible sealing ring (10), pressure ring (11), wear pin (12 swing bolts (13) and Gland (14), it is characterized in that: the both sides of water conservancy diversion window (7) are semicircle or the arc-shaped structure that has certain inclination angle, and, make sealing surface be positioned at groove (9) bottom and constitute in valve body (1) center and setting of the contacted sealing surface of spool (8) place and the groove (9) that spool (8) top matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420012056 CN2720201Y (en) | 2004-06-04 | 2004-06-04 | Flush-free stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420012056 CN2720201Y (en) | 2004-06-04 | 2004-06-04 | Flush-free stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2720201Y true CN2720201Y (en) | 2005-08-24 |
Family
ID=35009161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420012056 Expired - Fee Related CN2720201Y (en) | 2004-06-04 | 2004-06-04 | Flush-free stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2720201Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748484A (en) * | 2012-07-23 | 2012-10-24 | 岳阳筑盛阀门管道有限责任公司 | Angle type drain valve |
| CN104265909A (en) * | 2014-09-25 | 2015-01-07 | 江苏华太电力仪表有限公司 | Novel needle type stop valve |
| CN109723840A (en) * | 2017-10-30 | 2019-05-07 | 四川沃兰特阀门制造有限公司 | A kind of high temperature and high pressure cut-off valve |
| CN112727747A (en) * | 2021-01-14 | 2021-04-30 | 浙江强盛压缩机制造有限公司 | Online monitoring system of ultralow-temperature reciprocating compressor and power indicating method thereof |
-
2004
- 2004-06-04 CN CN 200420012056 patent/CN2720201Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748484A (en) * | 2012-07-23 | 2012-10-24 | 岳阳筑盛阀门管道有限责任公司 | Angle type drain valve |
| CN104265909A (en) * | 2014-09-25 | 2015-01-07 | 江苏华太电力仪表有限公司 | Novel needle type stop valve |
| CN109723840A (en) * | 2017-10-30 | 2019-05-07 | 四川沃兰特阀门制造有限公司 | A kind of high temperature and high pressure cut-off valve |
| CN112727747A (en) * | 2021-01-14 | 2021-04-30 | 浙江强盛压缩机制造有限公司 | Online monitoring system of ultralow-temperature reciprocating compressor and power indicating method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |