CN200946522Y - Quick-close steam-extraction check valve - Google Patents
Quick-close steam-extraction check valve Download PDFInfo
- Publication number
- CN200946522Y CN200946522Y CN 200620106670 CN200620106670U CN200946522Y CN 200946522 Y CN200946522 Y CN 200946522Y CN 200620106670 CN200620106670 CN 200620106670 CN 200620106670 U CN200620106670 U CN 200620106670U CN 200946522 Y CN200946522 Y CN 200946522Y
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- CN
- China
- Prior art keywords
- valve
- rod
- quick
- steam
- piston
- 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 steam-extraction check valve, including a valve body, a valve clack, a valve rod, a valve cap, a bracket, a quick-close device, a seal component and installation pieces; the quick-close device is composed of an electrohydraulic selector valve, a piston, a piston rod and a thrust spring; wherein, the piston rod is connected with the valve rod by means of a land; the valve clack and a valve seat are sealed by planar seal; a trip switch device is arranged on the valve rod; the trip switch device is composed of a control rod fixed on the valve rod, a trip switch block, an up stroke control switch and a down stroke control switch which are arranged in the trip switch block. The utility model has the advantages in that the structure is simple and the sealing performance is perfect. The invention is applicable for steam turbine extraction pipeline system to avoid the condensed water and the steam of pipeline system to flow backwards so as not to damage steam turbine.
Description
Technical field
The utility model relates to a kind of valve, specifically about a kind of Fast Valving Extraction Steam Check Damper.The utility model is applicable to the extracted steam from turbine pipe-line system, is used for preventing that the refluence of pipe-line system steam and condensed water from damaging steam turbine.
Background technique
Steam turbine is the key equipment of thermoelectricity and nuclear plant, the safety check that draws gas that is equipped with in the tail vapour discharge pipe system of steam turbine, and when steam turbine broke down, the quick closedown pipeline prevented from that pipe-line system steam and condensed water from flowing backwards to damage steam turbine.The safety check that draws gas generally is made up of valve and quick closing valve device, is 00218743.4 the check vavle device that draws gas as the patent No., comprises a butterfly check valve and described butterfly check valve quick closing valve device, and wherein, the butterfly plate of described butterfly check valve is an eccentric; Characteristics are, butterfly plate is to be arranged on the valve seat with being obliquely installed, and the angle of itself and valve seat central axis is the 40-60 degree, and is provided with a bearing in the described butterfly plate in the heart, and the take-off lever of described butterfly check valve quick closing valve device is conflicted on described bearing.The butterfly plate shutoff stroke of butterfly check valve is little, thus its open and close flexibility and reliability, and can play non-return simultaneously and end double action.Its shortcoming is that complex structure, sealability are bad.
Summary of the invention
The purpose of this utility model is the shortcoming that exists at prior art, and a kind of Fast Valving Extraction Steam Check Damper of simple in structure, good seal performance is provided.
The technological scheme that realizes the utility model purpose comprises valve body, flap, valve rod, valve gap, support, quick closing valve device and Sealing and assembling set, the quick closing valve device comprises electro-hydraulic reversing valve, oil hydraulic cylinder, piston, piston rod and thrust spring, piston rod is connected by land with valve rod, mainly be that flap and valve seat adopt plane sealing, valve rod is provided with stroke switchgear, and the trip switch gear is made up of the up stroke control switch and the down stroke control switch that are fixed on controlling rod, the position limit switch seat on the valve rod and be installed in the position limit switch seat.
In above technological scheme, a transparent sealed cover is installed between valve gap and the oil hydraulic cylinder.
The utility model advantage compared with prior art is: stroke switchgear is set on valve rod, the control electro-hydraulic reversing valve is to the quick closing valve position of flap and the Lift of flap, make between flap and the valve seat and can adopt plane sealing structure, have advantages such as simple in structure, good seal performance.
Description of drawings
Fig. 1 is a structure sectional view of the present utility model.
Embodiment
Fast Valving Extraction Steam Check Damper as shown in Figure 1, comprise valve body 1, flap 2, valve rod 3, valve gap 4, support 8, quick closing valve device and Sealing and assembling set, the quick closing valve device comprises electro-hydraulic reversing valve 9, oil hydraulic cylinder 10, piston 18, piston rod 19 and thrust spring 20, and piston rod 19 is connected by land 6 with valve rod 3.Flap 2 adopts plane sealing with valve seat, and valve rod 3 is provided with stroke switchgear, and the trip switch gear is made up of the upper stroke switch 7 and the lower stroke switch 17 that are fixed on controlling rod 12, the position limit switch seat 13 on the valve rod 3 and be installed in the position limit switch seat 13.Position limit switch seat 13 is installed on the support 8, the Lift of upper stroke switch 7 control flaps 2, flap 2 back sides and valve gap 4 are produced bump when preventing to open, and closed position during lower stroke switch 17 control flaps 2 quick closing valves prevents the collision of flap 2 sealing surfaces and sealing surface of seat.Stuffing box packing between valve gap 4 and the valve rod 3 compresses sealing by gland 5.Covering 16 by divided ring 15 and flap between flap 2 and the valve rod 3 fixedlys connected.One transparent sealed cover 11 is installed between valve gap 4 and the oil hydraulic cylinder 10, is prevented that foreign material from entering piston rod 19, improve the sealing reliability between piston rod 19 and the oil hydraulic cylinder 10.This transparent sealed cover 11 is installed on outside the support 8, and is provided with positioning block 14 between the support 8, fixing mounting point between the two.Working principle: under the normal working, enter pressure medium in the electro-hydraulic reversing valve 9 control oil hydraulic cylinders 10, promote piston 18 and rise, open flap 2, medium flows into from the import of flap 2 lower planes, flows out from outlet; When steam turbine breaks down, send SC sigmal control electro-hydraulic reversing valve 9, make pressure release in the oil hydraulic cylinder 10, the elastic force effect of thrust spring 20 makes flap 2 quick closedowns, prevents that the refluence of valve export lateral line system's steam and condensed water from damaging steam turbine.
Claims (2)
1, a kind of Fast Valving Extraction Steam Check Damper, comprise valve body (1), flap (2), valve rod (3), valve gap (4), support (8), quick closing valve device and Sealing and assembling set, the quick closing valve device comprises electro-hydraulic reversing valve (9), oil hydraulic cylinder (10), piston (18), piston rod (19) and thrust spring (20), piston rod (19) is connected by land (6) with valve rod (3), it is characterized in that flap (2) and valve seat adopt plane sealing, valve rod (3) is provided with stroke switchgear, and the trip switch gear is by the controlling rod (12) that is fixed on the valve rod (3), position limit switch seat (13) and the upper stroke switch (7) and the lower stroke switch (17) that are installed in the position limit switch seat (13) are formed.
2, Fast Valving Extraction Steam Check Damper according to claim 1 is characterized in that installing between valve gap (4) and the oil hydraulic cylinder (10) transparent sealed cover (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620106670 CN200946522Y (en) | 2006-08-14 | 2006-08-14 | Quick-close steam-extraction check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620106670 CN200946522Y (en) | 2006-08-14 | 2006-08-14 | Quick-close steam-extraction check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200946522Y true CN200946522Y (en) | 2007-09-12 |
Family
ID=38733583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620106670 Expired - Fee Related CN200946522Y (en) | 2006-08-14 | 2006-08-14 | Quick-close steam-extraction check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200946522Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423505A (en) * | 2012-05-16 | 2013-12-04 | 江南阀门有限公司 | HV fast changeover valve |
| CN107806522A (en) * | 2017-11-25 | 2018-03-16 | 浙江杰特优动力机械有限公司 | A kind of steam-extracting type speed closes non-return valve and its method of work |
-
2006
- 2006-08-14 CN CN 200620106670 patent/CN200946522Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423505A (en) * | 2012-05-16 | 2013-12-04 | 江南阀门有限公司 | HV fast changeover valve |
| CN103423505B (en) * | 2012-05-16 | 2016-03-23 | 江南阀门有限公司 | HV rapid switching valve |
| CN107806522A (en) * | 2017-11-25 | 2018-03-16 | 浙江杰特优动力机械有限公司 | A kind of steam-extracting type speed closes non-return valve and its method of work |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhengzhou Pump Valve Manufacturing Co., Ltd. Assignor: Huang Yunping Contract fulfillment period: 2008.10.20 to 2016.8.13 Contract record no.: 2008330002905 Denomination of utility model: Quick-close steam-extraction check valve Granted publication date: 20070912 License type: Exclusive license Record date: 20081229 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.10.20 TO 2016.8.13; CHANGE OF CONTRACT Name of requester: ZHEJIANG PROVINCE ZHENGZHOU VALVE MANUFACTURING CO Effective date: 20081229 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070912 Termination date: 20100814 |