CN201083269Y - Double-piston water turbine water-feeding hydraulic double-sealing butterfly valve - Google Patents
Double-piston water turbine water-feeding hydraulic double-sealing butterfly valve Download PDFInfo
- Publication number
- CN201083269Y CN201083269Y CNU2007200853476U CN200720085347U CN201083269Y CN 201083269 Y CN201083269 Y CN 201083269Y CN U2007200853476 U CNU2007200853476 U CN U2007200853476U CN 200720085347 U CN200720085347 U CN 200720085347U CN 201083269 Y CN201083269 Y CN 201083269Y
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Abstract
The utility model relates to a double-piston type water intake hydraulic motive double-seal butterfly valve for water turbine. A double plate butterfly board is arranged inside a valve body, a valve axle is connected with the double plate butterfly board through the valve body, an operating mechanism arranged outside the valve body is connected with the external part of the valve axle, a water inlet end and a water outlet end are respectively arranged on two ends of the top part of the valve body, and a metal repair sealing device and a metal working sealing device are arranged respectively and symmetrically on the water inlet end and the water outlet end of the top part of the valve body. The utility model which adopts a double-seal structure of double eccentricity, double plate butterfly board and double piston has the advantages of high pressure resistance, abrasion proofness, corrosion resistance, etc. Furthermore, the two sets of sealing device can be used alternatively, thereby ensuring that other machines continue to work normally when one machine is undergoing reconditioning.
Description
Technical field:
The utility model relates to butterfly valve, particularly relates to water turbine inlet butterfly valve.
Background technique:
The double piston type water turbine surge double seals butterfly valve be installed in, on the penstock before the low big small plant spiral case inlet transition section, it mainly acts on and is:
1, when water turbine breaks down; be used for blocking current; guarantee unit safety; when water turbine is shut down, close the maintenance that inlet valve is beneficial to water turbine, and do not influence the normal operation of other unit; be particularly suitable for supplying water simultaneously to several units as a water delivery house steward; when wherein needs overhaul, in order to block current, so that do not influence the normal operation of other unit.
2, break down when water wheels unit speed control system, generating unit speed is elevated under the situation of setting valve, and current are blocked in moving water emergency cut-off, guarantee unit safety, and the accident that prevents enlarges.
3, when the water turbine group leader phase stops using; block upland water, to reduce the gap cavitation erosion damage that stator leaks and causes because of leaking, also can avoid the unit long-time running after; because of the stator water leakage increases the problem that can not shut down, also can shorten the required time of unit when starting shooting again.
Existing water turbine surges into, and the water double seals butterfly valve generally adopts one solid rubber seal ring to realize sealing with the metal hard-sealing circle, it is provided with metal maintenance seal arrangement at the valve feed-water end, rubber working seal device is set in the waterexit end, this double sealing structure deficiency is: after the long-term work, the rubber working seal device of waterexit end occurs aging inevitably or weares and teares owing to the back that rubs for a long time produces, particularly relatively poor in water quality, under the more situation of sediment charge, medium can produce corrosion silt to rubber and rubber is washed away etc. all can cause seal failure, its working seal is leaked, need to change rubber seal, but under operating conditions, the replacing rubber seal is restricted and makes it change quite difficulty, can waste great amount of manpower simultaneously, material resources and financial resources.
Summary of the invention:
The purpose of this utility model is to provide a kind of double piston type hydroturbine water intake double seals butterfly valve that surges, it is that feed-water end at valve is provided with the metal sealing device twice symmetry, identical with the waterexit end, promptly at feed-water end metal maintenance seal arrangement is set, the waterexit end is provided with the working metal seal arrangement with spline structure.
The technical solution of the utility model is as follows:
The utility model includes valve body, two dull and stereotyped butterfly plates, valve shaft, operating device, the maintenance sealing pair, working seal pair etc., two dull and stereotyped butterfly plates are housed in the valve body, valve shaft is connected with two dull and stereotyped butterfly plates by valve body, operating device is arranged on the outside of valve body and is connected in the outside of valve shaft, feed-water end is arranged on an end at valve body top, the waterexit end is arranged on the other end at valve body top, the working seal pair is arranged on feed-water end, the maintenance sealing pair is arranged on the waterexit end, it is characterized in that: the both sides symmetry is set in the feed-water end of valve and waterexit end, identical metal sealing device, the feed-water end setting be metal maintenance seal arrangement, it is working metal seal arrangement with spline structure that the waterexit end is provided with.
The metal o-ring of its maintenance seal arrangement and working seal device is L shaped, is connected on the butterfly plate by adjusting screw by sealing gland.
Advantage of the present utility model is as follows:
The utility model has adopted the double sealing structure of two off-centre, two flat board, double piston type, the dawn seal ring all is a metal o-ring, have advantages such as high pressure resistant, wear-resistant, corrosion-resistant, long service life, and two seal rings can also exchange use, the working life of valve and the operating time of unit have been prolonged greatly, guaranteed that other unit also can normally move when a unit need overhaul.It not only solved over the years must generation outage because of the maintenance valve passive situation, and improved working life and the generating efficiency of unit greatly, simultaneously can rational utilization of water resources, using water wisely, and simple, convenient during the maintenance valve.
Description of drawings
Accompanying drawing 1 is the utility model structural representation;
Accompanying drawing 2 is the utility model side view;
Structural representation when accompanying drawing 3 is devoted oneself to work for overhauling sealing pair and working seal pair;
Structural representation when accompanying drawing 4 is maintenance sealing pair and working seal pair releasing work.
Embodiment:
Referring to accompanying drawing embodiment, the utility model will be further described:
Among the accompanying drawing 1-2:
Valve shaft (3) is by valve body (1) and two dull and stereotyped butterfly plates (2) of ining succession, operating device (4) is connected on the outer valve shaft (3) of valve body (1), maintenance sealing pair (5) and working seal pair (7) are separately positioned on feed-water end (6), waterexit end (8) at two ends, the valve left and right sides and locate, and its maintenance seal ring (5) and working seal circle (7) are metal o-ring.During valve opening and closing, in 90 ° of scopes, rotate, reach the purpose that is communicated with or blocks medium by operating device (4) drive valve shaft (3) and two dull and stereotyped butterfly plates (2).During proper functioning, its working seal pair (7) comes into operation, and when working seal (7) or journal packing need overhaul, for the water in the not emptying penstock, does not influence the proper functioning of other unit simultaneously, and maintenance sealing pair (5) is devoted oneself to work.
In the accompanying drawing 1,3,4:
Maintenance sealing pair (5) and working seal pair (7) are the sealing pair of two symmetries, it is made up of piston tube (9), piston seat (10), piston ring (11), butterfly plate seal ring (12), sealing gland (13) and adjusting screw (14) etc., and butterfly plate seal ring (12) is fixed on two dull and stereotyped butterfly plates (2) by adjusting screw (14) by sealing gland (13).Maintenance sealing pair (5) and working seal pair (7) are the metal hard-sealing structure, wherein butterfly plate seal ring (12) is L shaped, have selfsealings, valve seals is the piston cylinder operator that piston ring (11) adopts symmetry, be removable hood pressure type seal ring, adopt conical surface form, its piston tube (9), piston seat (10), piston ring (11) has been formed a tight-closed piston, be respectively arranged with water inlet A on piston tube (9) and the piston seat (10), water outlet B, power source adopts external water pressure, its action is as follows: when maintenance sealing pair (5) or working seal pair (7) needs input, A chamber on piston tube (9) intakes, B chamber water outlet from the piston seat (10), press water promotes piston ring (11) moving linearly to the right, contact with butterfly plate seal ring (12) until piston (11), produce enough seal pressures, can overhaul or valve closing this moment.
When maintenance sealing pair (5) or working seal pair (7) needed to remove, press water advanced by the A chamber from the B chamber, promoted piston ring (11) moving linearly left, and two sealing surfaces break away from fully, when overhauling sealing pair (5) and working seal pair (7) when all locating disengaged condition.Valve can be opened or close normally.
Claims (2)
1. double piston type hydroturbine water intake double seals butterfly valve that surges, include valve body (1), two dull and stereotyped butterfly plates (2), valve shaft (3), operating device (4), maintenance sealing pair (5), working seal pair (7), two dull and stereotyped butterfly plates (2) are housed in the valve body (1), valve shaft (3) is connected with two dull and stereotyped butterfly plates (2) by valve body (1), operating device (4) is arranged on the outside of valve body (1) and is connected in the outside of valve shaft (3), feed-water end (6) is arranged on an end at valve body (1) top, waterexit end (8) is arranged on the other end at valve body (1) top, maintenance sealing pair (5) is arranged on feed-water end (6), working seal pair (7) is arranged on waterexit end (8), it is characterized in that: the both sides symmetry is set in the feed-water end (6) of valve and waterexit end (8), identical metal sealing device, what feed-water end (6) was provided with is metal maintenance seal arrangement (5), and the waterexit end setting is the working metal seal arrangement (7) with spline structure.
2. the double piston type hydroturbine water intake according to claim 1 double seals butterfly valve that surges, it is characterized in that: the butterfly plate seal ring (12) of maintenance seal arrangement (5) and working seal device (7) is connected on the butterfly plate (2) by adjusting screw (14) by sealing gland (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200853476U CN201083269Y (en) | 2007-06-20 | 2007-06-20 | Double-piston water turbine water-feeding hydraulic double-sealing butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200853476U CN201083269Y (en) | 2007-06-20 | 2007-06-20 | Double-piston water turbine water-feeding hydraulic double-sealing butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201083269Y true CN201083269Y (en) | 2008-07-09 |
Family
ID=39625736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200853476U Expired - Fee Related CN201083269Y (en) | 2007-06-20 | 2007-06-20 | Double-piston water turbine water-feeding hydraulic double-sealing butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201083269Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2007
- 2007-06-20 CN CNU2007200853476U patent/CN201083269Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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: 20080709 Termination date: 20130620 |