CN200958613Y - Double-sealed buttfly valve for hydraulic electric power generation inlet channel - Google Patents
Double-sealed buttfly valve for hydraulic electric power generation inlet channel Download PDFInfo
- Publication number
- CN200958613Y CN200958613Y CN 200620093410 CN200620093410U CN200958613Y CN 200958613 Y CN200958613 Y CN 200958613Y CN 200620093410 CN200620093410 CN 200620093410 CN 200620093410 U CN200620093410 U CN 200620093410U CN 200958613 Y CN200958613 Y CN 200958613Y
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- valve body
- seal ring
- seal
- pair
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- Expired - Fee Related
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Abstract
A dual sealing butterfly valve used for the water inlet channel of hydroelectric generation, including a valve body; a valve plate is provided in the valve body, the valve plate is equipped with a valve stem out of the valve body, two sealing pairs are provided between the valve body and the valve plate which are the operation sealing pair in the front and maintenance sealing pair at the back; the maintenance sealing pair is the cylinder piston type sealing pair, the sealing lip section of piston type valve body sealing ring enters out from the front of cylinder, the proportion of area of maximal section in the front of piston type valve body sealing ring piston section and area of maximal section at the back of piston type valve body sealing ring piston section is 1.005. This utility model is provided with an operation sealing pair and a maintenance sealing pair, a hydroelectric generation water inlet channel is equipped with functions of an operation valve and a maintenance valve, a valve can be reduced in use and the expense is saved; much convenience will be provided when two sealing pairs are repaired on the same valve, after the maintenance pair is started, the sealing ring of piston type valve body in fluid won't move, which won't influence on and off of this utility model in use as operation valve.
Description
Technical field
The utility model relates to a kind of hydroelectric power intake tunnel butterfly valve, the sealing of butterfly valve plate of particularly a kind of hydroelectric power intake tunnel.
Background technique
On the hydroelectric power intake tunnel service valve is arranged, service valve is used for controlling the break-make that supplies water to the hydroelectric power unit.Open service valve, supplying water to the hydroelectric power unit is used for generating, turn-offs service valve, stops to supply water to the hydroelectric power unit.Service valve will overhaul the sealing pair of service valve in use for some time, can not have water to flow through service valve when the sealing pair of service valve overhauls.Maintenance for service valve, in the prior art, service valve upstream on the hydroelectric power intake tunnel is equipped with the maintenance valve, the service valve door normally is in opening state, when service valve need overhaul, close the maintenance valve, stop to service valve and the water flowing of hydroelectric power unit, so that service valve is overhauled.This hydroelectric power intake tunnel will be equipped with two valves, the valve that wherein is used for work has only one, for the maintenance of service valve also will be installed a maintenance valve more, cause the expense height, sometimes service valve and maintenance valve mounting point wide apart, when the service work valve, also very inconvenient with getting in touch of maintenance valve place.
Summary of the invention
The purpose of this utility model is in order to overcome above-mentioned deficiency, to propose a kind of hydroelectric power intake tunnel double seals butterfly valve that has service valve and service valve gate action on the hydroelectric power intake tunnel simultaneously.
The utility model is realized with the following method.
The hydroelectric power intake tunnel has valve body with double seals butterfly valve, valve plate is arranged in the valve body, the valve rod that stretches out valve body is arranged on the valve plate, there is fore working seal secondary and between valve body and valve plate in the maintenance sealing pair two seals pair at rear portion, sealing pair is an annular, annular working sealing pair and annular maintenance sealing pair are parallel to each other in the both sides of valve rod, annular working sealing pair and annular maintenance sealing pair equate apart from the distance of valve rod, the working seal pair is made up of with the valve seal ring that is set in valve body inner circumference front portion the valve plate seal ring that is set on the anterior excircle of valve plate, there is cylinder body at valve body inner circumference rear portion, there is liquid entrance at the two ends of cylinder body, the maintenance sealing pair is made up of the piston type valve body seal ring that is set in the valve plate seal ring on the excircle of valve plate rear portion and matches with cylinder body, piston type valve body seal ring has seal lip section and piston section, the seal lip section of piston type valve body seal ring is stretched out from the cylinder body front end, the axis of cylinder body and piston type valve body seal ring and the axis of valve body are on same straight line, piston type valve body seal ring can slide along axial direction in cylinder body, when piston type valve body seal ring slides into the front portion, piston type valve body seal ring contacts with valve plate seal ring on the excircle of valve plate rear portion, the maintenance sealing pair becomes sealing state, when piston type valve body seal ring slides into the rear portion, piston type valve body seal ring leaves mutually with valve plate seal ring on the excircle of valve plate rear portion, the maintenance sealing pair becomes opening state, and the ratio of the area of the maximum cross-section of piston type valve body seal ring piston section front portion and the maximum cross-section area at piston type valve body seal ring piston section rear portion is more than or equal to 1.005.
During use, the utility model is installed on the hydroelectric power intake tunnel, liquid entrance at the two ends of cylinder body is connected with oil hydraulic pump, oil hydraulic pump can make piston type valve body seal ring slide along axial direction in cylinder body, make the maintenance sealing pair become opening state with oil hydraulic pump, then the utility model can be used as the service valve on the hydroelectric power intake tunnel, because the area of the maximum cross-section of piston type valve body seal ring piston section front portion and the ratio of the maximum cross-section area at piston type valve body seal ring piston section rear portion are more than or equal to 1.005, be in power that piston type valve body seal ring in the fluid is subjected to backward directions be greater than forwards to power, after so oil hydraulic pump makes the maintenance sealing pair become opening state, piston type valve body seal ring can not move, the valve plate seal ring of working seal pair can not touch piston type valve body seal ring in the valve plate rotation process when piston type valve body seal ring slides into the rear portion, opening and closing when not influencing the utility model and using as service valve, in the time of after service valve uses a period of time, will overhauling to the working seal pair, make the maintenance sealing pair become sealing state with oil hydraulic pump, overhauling the current that sealing part is sealed intake tunnel, promptly can overhaul the working seal pair.
The utility model has the secondary and maintenance sealing pair two seals pair of working seal, has the function of service valve and two valves of maintenance valve in the hydroelectric power intake tunnel, in use can reduce by a valve, cost saving; Working seal was secondary very convenient with getting in touch of maintenance valve place when two sealing pairs overhauled on same valve, be in power that piston type valve body seal ring in the fluid is subjected to backward directions be greater than forwards to power, after so oil hydraulic pump makes the maintenance sealing pair become opening state, piston type valve body seal ring can not move, the opening and closing when not influencing the utility model and using as service valve.
Below in conjunction with accompanying drawing, the utility model is further described.
Description of drawings
Fig. 1 is that the hydroelectric power intake tunnel cuts open schematic representation with the master office of looking of double seals butterfly valve;
Fig. 2 is the local cross-sectional schematic of amplifying of overlooking of Fig. 1.
Embodiment
Fig. 1, among Fig. 2, the hydroelectric power intake tunnel has valve body 1 with double seals butterfly valve, valve plate 2 is arranged in the valve body, the valve rod 3 that stretches out valve body is arranged on the valve plate, there is fore working seal secondary and between valve body and valve plate in the maintenance sealing pair two seals pair at rear portion, sealing pair is an annular, annular working sealing pair and annular maintenance sealing pair are parallel to each other in the both sides of valve rod, annular working sealing pair and annular maintenance sealing pair equate apart from the distance of valve rod, the working seal pair is made up of with the valve seal ring 5 that is set in valve body inner circumference front portion the valve plate seal ring 4 that is set on the anterior excircle of valve plate, there is cylinder body 6 at valve body inner circumference rear portion, there is liquid entrance 7 at the two ends of cylinder body, 8, the maintenance sealing pair is made up of the piston type valve body seal ring 10 that is set in the valve plate seal ring 9 on the excircle of valve plate rear portion and matches with cylinder body, piston type valve body seal ring has seal lip section 11 and piston section 12, the seal lip section of piston type valve body seal ring is stretched out from the cylinder body front end, the axis of cylinder body and piston type valve body seal ring and the axis of valve body are on same straight line, piston type valve body seal ring can slide along axial direction in cylinder body, when piston type valve body seal ring slides into the front portion, piston type valve body seal ring contacts with valve plate seal ring on the excircle of valve plate rear portion, the maintenance sealing pair becomes sealing state, when piston type valve body seal ring slides into the rear portion, piston type valve body seal ring leaves mutually with valve plate seal ring on the excircle of valve plate rear portion, the maintenance sealing pair becomes opening state, and the ratio of the area of the maximum cross-section of piston type valve body seal ring piston section front portion and the maximum cross-section area at piston type valve body seal ring piston section rear portion is more than or equal to 1.005.
The diameter of anterior working seal pair will be a bit larger tham the diameter of rear portion maintenance sealing pair, the diameter of anterior working seal pair with the size relationship of the diameter of rear portion maintenance sealing pair is: in the valve plate rotation process, the maintenance sealing pair be set in valve plate seal ring on the excircle of valve plate rear portion pass through the working seal pair be set in the valve seal ring of valve body inner circumference front portion the time, be set in the seal lip of the valve plate seal ring on the excircle of valve plate rear portion and the minimum range that is set between the seal lip of valve seal ring of valve body inner circumference front portion is 3.5～7 millimeters.
The stroke that piston type valve body seal ring slides backward is: when piston type valve body seal ring slides into the rear portion, in the valve plate rotation process, the working seal pair be set in valve plate seal ring on the anterior excircle of valve plate through piston type valve body seal ring the time, the seal lip that is set in the valve plate seal ring on the anterior excircle of valve plate is 3.5～7 millimeters with minimum range between the seal lip of mistake piston type valve seal ring.
Because the utility model is when using as service valve usually, piston type valve body seal ring should be the position at the rear portion, in order to indicate piston type valve body seal ring is position at the rear portion, piston type valve body seal ring is connected with displacement transducer or position limit switch, when the position of piston type valve body seal ring at the rear portion, displacement transducer or position limit switch output valve opening signal indicate the location status of piston type valve body seal ring with indicating device.
Among Fig. 2, displacement transducer or position limit switch 13 are arranged on the valve body, there is the triggering projection 15 relative with the contact contact 14 of displacement transducer or position limit switch on the piston type valve body seal ring in valve body.
Working seal is secondary can all to be hard sealing with overhauling sealing pair, can all be soft seal also, also can be that the working seal pair is soft seal, and the maintenance sealing pair is hard sealing.
Claims (9)
1. hydroelectric power intake tunnel double seals butterfly valve, valve body is arranged, valve plate is arranged in the valve body, the valve rod that stretches out valve body is arranged on the valve plate, there is the working seal pair front portion between valve body and valve plate, sealing pair is an annular, the working seal pair is made up of with the valve seal ring that is set in valve body inner circumference front portion the valve plate seal ring that is set on the anterior excircle of valve plate, it is characterized in that: there is the maintenance sealing pair at the rear portion between valve body and valve plate, sealing pair is an annular, annular maintenance sealing pair and annular working sealing pair are parallel to each other in the both sides of valve rod, annular working sealing pair and annular maintenance sealing pair equate apart from the distance of valve rod, there is cylinder body at valve body inner circumference rear portion, there is liquid entrance at the two ends of cylinder body, the maintenance sealing pair is made up of the piston type valve body seal ring that is set in the valve plate seal ring on the excircle of valve plate rear portion and matches with cylinder body, piston type valve body seal ring has seal lip section and piston section, the seal lip section of piston type valve body seal ring is stretched out from the cylinder body front end, the axis of cylinder body and piston type valve body seal ring and the axis of valve body are on same straight line, and the ratio of the area of the maximum cross-section of piston type valve body seal ring piston section front portion and the maximum cross-section area at piston type valve body seal ring piston section rear portion is more than or equal to 1.005.
2. by the described hydroelectric power intake tunnel of claim 1 double seals butterfly valve, it is characterized in that: displacement transducer or position limit switch are arranged on the described valve body, there is the triggering projection relative with the contact contact of displacement transducer or position limit switch on the piston type valve body seal ring in valve body.
3. by claim 1 or 2 described hydroelectric power intake tunnel double seals butterfly valves, it is characterized in that: the diameter of described anterior working seal pair is a bit larger tham the diameter of rear portion maintenance sealing pair, the size relationship of the diameter of the diameter of anterior working seal pair and rear portion maintenance sealing pair is: in the valve plate rotation process, the maintenance sealing pair be set on the excircle of valve plate rear portion the valve plate seal ring through the working seal pair be set in the valve seal ring of valve body inner circumference front portion the time, the minimum range that is set in the seal lip of the valve plate seal ring on the excircle of valve plate rear portion and is set between the seal lip of valve seal ring of valve body inner circumference front portion is 3.5～7 millimeters, the stroke that described piston type valve body seal ring slides backward is: when piston type valve body seal ring slides into the rear portion, in the valve plate rotation process, the working seal pair be set in valve plate seal ring on the anterior excircle of valve plate through piston type valve body seal ring the time, the minimum range that is set between the seal lip of the seal lip of the valve plate seal ring on the anterior excircle of valve plate and piston type valve body seal ring is 3.5～7 millimeters.
4. by claim 1 or 2 described hydroelectric power intake tunnel double seals butterfly valves, it is characterized in that: described working seal is secondary all to be hard sealing with overhauling sealing pair.
5. by claim 1 or 2 described hydroelectric power intake tunnel double seals butterfly valves, it is characterized in that: described working seal is secondary all to be soft seal with overhauling sealing pair.
6. by claim 1 or 2 described hydroelectric power intake tunnel double seals butterfly valves, it is characterized in that: described working seal pair is soft seal, and the maintenance sealing pair is hard sealing.
7. by the described hydroelectric power intake tunnel of claim 3 double seals butterfly valve, it is characterized in that: described working seal is secondary all to be hard sealing with overhauling sealing pair.
8. by the described hydroelectric power intake tunnel of claim 3 double seals butterfly valve, it is characterized in that: described working seal is secondary all to be soft seal with overhauling sealing pair.
9. by the described hydroelectric power intake tunnel of claim 3 double seals butterfly valve, it is characterized in that: described working seal pair is soft seal, and the maintenance sealing pair is hard sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620093410 CN200958613Y (en) | 2006-09-26 | 2006-09-26 | Double-sealed buttfly valve for hydraulic electric power generation inlet channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620093410 CN200958613Y (en) | 2006-09-26 | 2006-09-26 | Double-sealed buttfly valve for hydraulic electric power generation inlet channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200958613Y true CN200958613Y (en) | 2007-10-10 |
Family
ID=38785495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620093410 Expired - Fee Related CN200958613Y (en) | 2006-09-26 | 2006-09-26 | Double-sealed buttfly valve for hydraulic electric power generation inlet channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200958613Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213321A (en) * | 2011-06-24 | 2011-10-12 | 铁岭阀门(集团)特种阀门有限责任公司 | Dual seal water-filling butterfly valve |
| CN102384274A (en) * | 2011-11-17 | 2012-03-21 | 株洲南方阀门股份有限公司 | Double-seal butterfly valve with maintenance sealing system |
| CN103016763A (en) * | 2012-12-29 | 2013-04-03 | 能发伟业铁岭阀门股份有限公司 | Dual-seal water inlet butterfly valve with valve body sealing ring provided with guide ring |
-
2006
- 2006-09-26 CN CN 200620093410 patent/CN200958613Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213321A (en) * | 2011-06-24 | 2011-10-12 | 铁岭阀门(集团)特种阀门有限责任公司 | Dual seal water-filling butterfly valve |
| CN102213321B (en) * | 2011-06-24 | 2013-06-12 | 铁岭阀门(集团)特种阀门有限责任公司 | Dual seal water-filling butterfly valve |
| CN102384274A (en) * | 2011-11-17 | 2012-03-21 | 株洲南方阀门股份有限公司 | Double-seal butterfly valve with maintenance sealing system |
| CN102384274B (en) * | 2011-11-17 | 2014-04-09 | 株洲南方阀门股份有限公司 | Double-seal butterfly valve with maintenance sealing system |
| CN103016763A (en) * | 2012-12-29 | 2013-04-03 | 能发伟业铁岭阀门股份有限公司 | Dual-seal water inlet butterfly valve with valve body sealing ring provided with guide ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071010 Termination date: 20110926 |