CN2612850Y - Quick-acting shutdown valve - Google Patents
Quick-acting shutdown valve Download PDFInfo
- Publication number
- CN2612850Y CN2612850Y CN 03221841 CN03221841U CN2612850Y CN 2612850 Y CN2612850 Y CN 2612850Y CN 03221841 CN03221841 CN 03221841 CN 03221841 U CN03221841 U CN 03221841U CN 2612850 Y CN2612850 Y CN 2612850Y
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- China
- Prior art keywords
- valve
- valve seat
- utility
- model
- gearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a valve, which comprises a valve body, a valve seat, a valve clack, a valve cover, a cylinder control device, a seal part, and an installation part, wherein a flat surface of the valve seat and a center line of a channel form an angle alpha, thereby closing time of the utility model is short, the closing time achieves <= 0.3 second, and when using condition of liquid medium, a small water hammer is capable of being reduced effectively, thereby having the advantages that protective effect of equipment is excellent, and being very suitable for an emergency cutting switch on an outlet pipeline of a steam turbine.
Description
Technical field
The utility model relates to a kind of pipe switch device, specifically about a kind of valve.The utility model is applicable to the emergency cut-off switch on the steam turbine outlet conduit.
Prior art
When steam turbine removal of load or compressor emergency shutdown, need the valve quick closedown in a short period of time on the extraction line, prevent that steam turbine afterbody steam and condensed water from pouring in down a chimney, avoid steam turbine hypervelocity and " driving " accident takes place, the safety of protection steam turbine.At present, main employing external product on the steam turbine of domestic thermoelectricity plant, but its price is very expensive, and for this reason, more domestic in recent years producers also begin design and produce this product.In the research and design of this product, shut-in time is one of leading indicator of product, product structurally is to adopt electrichydraulic control or accumulator control mode basically both at home and abroad, realization is to the quick closedown of valve, yet the shut-in time of product still is long, generally all more than 0.5 second, when being used in the operating mode of liquid medium, its water hammer is bigger, and this is the main deficiency of prior art.
The model utility content
The purpose of this utility model is the deficiency that exists at prior art, provides a kind of shut-in time short, can effectively reduce the rapid cut-off valve of water hammer when the operating mode of liquid medium is used.
The technological scheme that realizes the utility model purpose comprises valve body, valve seat, flap, valve gap, cylinder control unit and Sealing and assembling set, mainly is that valve seat planes and channel centerline form angle α.
In above scheme, the rocking bar that is connected with flap is provided with gearing, and this gearing matches with shift fork on the cylinder axis.
The utility model beneficial effect compared with prior art is to adopt valve seat planes and channel centerline to constitute the structural design of angle; make the utility model shut-in time short; its turn-off time reaches≤and 0.3 second; and when the operating mode of liquid medium is used, can effectively reduce water hammer, so effective to the protection of equipment.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Rapid cut-off valve as shown in Figure 1 comprises valve body 1, valve seat 9, flap 2, valve gap 8, cylinder control unit 3 and Sealing and assembling set, and valve seat planes and channel centerline form angle α.Angle α is between 20 ° to 40 °, is designed to 30 ° in this programme.Fixedly connected with rocking bar 4 in the back side of flap 2, rocking bar 4 is provided with gearing, and this gearing is fixed on the rocking bar 4 by axle 6, and match with shift fork 5.Connecting extension bar 7 on the rocking bar 4, extension bar 7 the other ends are provided with weight 10, the gravitational moment when opening with balance flap 2.Shift fork 5 is contained on the piston shaft of cylinder control unit 3, and the piston of cylinder control unit 3 is by system's gas circuit control.
Claims (5)
1, a kind of rapid cut-off valve comprises valve body (1), valve seat (9), flap (2), valve gap (8), cylinder control unit (3) and Sealing and assembling set, it is characterized in that valve seat (9) plane and channel centerline form angle α.
2, rapid cut-off valve according to claim 1 is characterized in that the angle α between valve seat (9) plane and the channel centerline is in 20 ° to the 40 ° scopes.
3, rapid cut-off valve according to claim 2 is characterized in that the angle α between valve seat (9) plane and the channel centerline is 30 °.
4, rapid cut-off valve according to claim 1 and 2 is characterized in that the rocking bar (4) that is connected with flap (2) is provided with gearing, and this gearing matches with shift fork (5) on the cylinder axis.
5, rapid cut-off valve according to claim 3 is characterized in that the rocking bar (4) that is connected with flap (2) is provided with gearing, and this gearing matches with shift fork (5) on the cylinder axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03221841 CN2612850Y (en) | 2003-05-13 | 2003-05-13 | Quick-acting shutdown valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03221841 CN2612850Y (en) | 2003-05-13 | 2003-05-13 | Quick-acting shutdown valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2612850Y true CN2612850Y (en) | 2004-04-21 |
Family
ID=34162393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03221841 Expired - Fee Related CN2612850Y (en) | 2003-05-13 | 2003-05-13 | Quick-acting shutdown valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2612850Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808976A (en) * | 2012-08-16 | 2012-12-05 | 大连大高阀门股份有限公司 | One-section extraction check valve |
| CN112050289A (en) * | 2019-06-05 | 2020-12-08 | 中核四0四有限公司 | Protection method for preventing damage of water hammer of heat exchange unit |
-
2003
- 2003-05-13 CN CN 03221841 patent/CN2612850Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808976A (en) * | 2012-08-16 | 2012-12-05 | 大连大高阀门股份有限公司 | One-section extraction check valve |
| CN112050289A (en) * | 2019-06-05 | 2020-12-08 | 中核四0四有限公司 | Protection method for preventing damage of water hammer of heat exchange unit |
| CN112050289B (en) * | 2019-06-05 | 2022-02-18 | 中核四0四有限公司 | Protection method for preventing damage of water hammer of heat exchange unit |
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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 |