CN202381775U - Quick-close check valve - Google Patents
Quick-close check valve Download PDFInfo
- Publication number
- CN202381775U CN202381775U CN2011205729626U CN201120572962U CN202381775U CN 202381775 U CN202381775 U CN 202381775U CN 2011205729626 U CN2011205729626 U CN 2011205729626U CN 201120572962 U CN201120572962 U CN 201120572962U CN 202381775 U CN202381775 U CN 202381775U
- Authority
- CN
- China
- Prior art keywords
- valve
- quick
- check valve
- close check
- valve seat
- 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 quick-close check valve comprising a valve body, a valve seat, a valve clack, a valve cap, a cylinder controller, a sealing piece and an installation piece. As an included angle alpha is formed between the plane of the valve seat and the center line of a channel, the closing time of the quick-close check valve is short, and the turn-off time of the quick-close check valve is less than or equal to 0.3 second; and when the quick-close check valve is used in a working condition of liquid media, use of a water hammer is effectively reduced, a equipment protection effect is good, and thus the quick-close check valve is applicable to an emergency cut-off switch on an outlet pipeline of a turbine.
Description
Technical field
The utility model relates to valve field, specifically about a kind of safety check.The utility model is applicable to the control switch of ability emergency cut-off on the steam turbine outlet conduit.
Background technique
When steam turbine is used 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 the 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 very expensive, for this reason, more domestic in recent years producers also begin design and produce this product.In the research and design of this product, the shut-in time is one of leading indicator of product, and 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 existing technology.
Summary of the invention
The purpose of the utility model is the deficiency that exists to existing technology, provides a kind of shut-in time short, when the operating mode of liquid medium is used, can effectively reduce the quick closing valve safety check of water hammer.
The technological scheme that realizes the utility model purpose comprises valve body, valve seat, flap, valve gap, cylinder control gear and Sealing and assembling set, mainly is that valve seat planes and channel centerline form angle.
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; Its quick closing valve time is short; Turn-off time≤0.3 second can effectively reduce water hammer when the operating mode of liquid medium is used, effective to the protection of equipment.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Quick closing valve safety check as shown in Figure 1; Comprise valve body 1, valve seat 9, flap 2, valve gap 8, cylinder control unit 3 and Sealing and assembling set; Valve seat 9 planes and channel centerline form angle, and this angle is the angle between valve body 1 inlet passage center line and its upside valve seat 9 planes.Angle is between 20 ° to 40 °, is designed to 30 ° in this programme.The back side of flap 2 is fixedly connected with rocking bar 4, and rocking bar 4 is provided with gearing, and this gearing is fixed on the rocking bar 4 by axle 6, and matches 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 quick closing valve safety check 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.
2. quick closing valve safety check according to claim 1 is characterized in that the angle between valve seat (9) plane and the channel centerline is in 20 ° to the 40 ° scopes.
3. quick closing valve safety check according to claim 2 is characterized in that the angle between valve seat (9) plane and the channel centerline is 30 °.
4. quick closing valve safety check 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. quick closing valve safety check 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 |
|---|---|---|---|
| CN2011205729626U CN202381775U (en) | 2011-12-19 | 2011-12-19 | Quick-close check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205729626U CN202381775U (en) | 2011-12-19 | 2011-12-19 | Quick-close check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202381775U true CN202381775U (en) | 2012-08-15 |
Family
ID=46630278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205729626U Expired - Fee Related CN202381775U (en) | 2011-12-19 | 2011-12-19 | Quick-close check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202381775U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431908A (en) * | 2021-06-03 | 2021-09-24 | 耐森阀业有限公司 | Quick cut-off butterfly valve with good stability |
-
2011
- 2011-12-19 CN CN2011205729626U patent/CN202381775U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431908A (en) * | 2021-06-03 | 2021-09-24 | 耐森阀业有限公司 | Quick cut-off butterfly valve with good stability |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20191219 |