CN102536619B - Pressure regulating valve of water turbine volute casing - Google Patents
Pressure regulating valve of water turbine volute casing Download PDFInfo
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- CN102536619B CN102536619B CN201210005907.8A CN201210005907A CN102536619B CN 102536619 B CN102536619 B CN 102536619B CN 201210005907 A CN201210005907 A CN 201210005907A CN 102536619 B CN102536619 B CN 102536619B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention relates to a pressure regulating valve of a water turbine volute casing. A valve bush is sleeved outside the tail end of a center pipe in a draining passage coaxially, two coaxial pull rods are fixedly mounted on the valve bush symmetrically and are particularly fixedly mounted on fixing seats fixedly mounted at lower ends of two sides of a fork mounted outside the draining passage, and the fork drives and guides the two pull rods to move horizontally so as to drive the valve bush to move on the center pipe coaxially. The pressure regulating valve in a mechanical combined full-hydraulic control mode realizes water feeding horizontally and water discharging horizontally, is high in throughput capacity and low in operating force, is accurate in movement and safe and reliable due to the pressure differential hydraulic-control mean, and is capable of running with a water turbine speed regulating system better to meet requirements for guaranteeing regulation of hydropower stations.
Description
Technical field
The invention belongs to valve class field, relate to the spiral shell shell systems in water power plant, particularly a kind of pressure regulating valve of water turbine volute casing.
Background technique
China's water resource is abundant, and under existing conditions, exploitation high head and long aqueduct power station are many, and high head or length have the diversion system power station of pressure can cause that in removal of load running pipeline hydraulic pressure rises and unit speed rises, if it is unfavorable that the speed governing in power station-voltage-regulating system regulates, can directly have influence on the safe operation in water power plant and the quality of power supply of water power, even can cause pipe breakage, lead to fatal crass's tragedy.Power station normally arranges the rising water pressure rate that surge shaft limits diversion system, and still, surge shaft construction investment is large, and the construction period is long, if there is the restriction of geological condition, surge shaft is set just more difficult.Therefore, adopt novel speed governing-pressure regulation linked system to substitute original surge shaft, can realize the adjusting task of unit day-to-day operation, regulation quality while having guaranteed again removal of load operation, and this system price is cheap, saves the cost of investment that is greater than 50%, with short production cycle, mounting arrangements is simple and convenient; Meanwhile, surge shaft is arranged on open air, diversion pipeline local environment is midway had to breaking-up to a certain degree, and voltage-regulating system is arranged in Power Plant, can not have any impact to environment.So replacing surge shaft with pressure regulator valve is to be all desirable selection in construction period, operational reliability.It,, by meeting water power plant to the requirement regulate guaranteeing, improves power station operating conditions, thereby accelerates the paces of China's construction of hydropower facilities and the quality of power supply of water power generating, for the fast development of national economy contributes.
Pressure regulator valve also claimed relief valve in the past, as far back as the '30s, just occurred, Japanese pressure regulator valve is just equipped with in the power station, Jingpo Lake in China's pre-peaceful liberation period northeast, and after liberation China has manufactured First pressure regulator valve nineteen sixty-five, is arranged on the green and bright Hydropower Station in Guangxi.But domestic pressure regulator valve latus rectum is smaller, and conveyance capacity is limited, field adjustable process is complicated, and layman is difficult to be competent at, and especially cannot realize the joint operation of same Turbine Governor System, regulates time lag larger, can not meet power station and regulates the requirement guaranteeing.If want to develop novel speed governing-pressure regulation linked system, must change the old structure of original pressure regulator valve, make it to mate with speed control system joint.The fund input that successfully a set of novel speed governing-pressure regulation linked system of exploitation not only will be a lot of and longer R&D cycle, more need to have long-term technological accumulation and high-quality specialized personnel, this makes domestic most manufacturer there is no fund or ability research and development novel system.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, the pressure regulating valve of water turbine volute casing of a kind of novel structure, design science is provided.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of pressure regulating valve of water turbine volute casing, the central tube of this pressure regulator valve is communicated with spiral case, the tail end of this central tube is arranged in the sluicing runner of pressure regulator valve, it is characterized in that: the central tube tail end in sluicing runner is with outer shaft sleeve one valve pocket, on valve pocket, symmetry is fixed with two homoaxial pull bars, these two pull bars are packed on the fixed base that the outer lower end, fork arm both sides of installing of sluicing runner is fixedly mounted with, and fork arm drives two pull bar horizontally-guideds operations and makes valve pocket same axial displacement on central tube;
In fork arm upper center, be fixed with a riser, piston rod at the upper end of this riser hinge dress servomotor oil cylinder, on this riser below this piston rod, hinge fills one end of a connecting rod, the other end hinge of this connecting rod is contained in one end of a rotation arm, the middle part hinge of rotation arm is contained on basis, the other end hinge of this rotation arm is contained in one end of pull bar, the other end hinge of this pull bar is contained in the upper end of a stator control panel, and the upper/lower terminal of this stator control panel cuts with scissors respectively and is contained on two chain cylinder piston rods of hydraulic pressure.
And, on described sluicing runner, be shaped with a process Installation hole, on sluicing runner, be also shaped with a vent.
And, described servomotor oil cylinder hinge is contained on basis and by valve sets control action, this valve sets consists of stop valve V1, stop valve V2, stop valve V3, stop valve V4, stop valve V5 and throttle valve V6, one-way valve V7, the inflow pipeline of stop valve V5 pilot pressure oil, stop valve V1, stop valve V2 control respectively the oil-feed of servomotor oil cylinder, stop valve V3, stop valve V4 control respectively the oil return of servomotor oil cylinder, and throttle valve V6, one-way valve V7 connect respectively the oil return of servomotor oil cylinder and control its velocity of displacement.
Advantage of the present invention and beneficial effect are:
1, this pressure regulator valve adopts the full hydraulic control pattern of joint, horizontal water inflow, horizontal water outlet, conveyance capacity is large, and action required power is little, and system adopts differential pressure type hydraulic control mode, action accurately, safe and reliable, can realize better with the joint of Turbine Governor System and moving, meet the requirement of Water Hammer.
When 2, this pressure regulator valve is when load rejection and in the quick closedown of unit stator, can open fast, the flow that need reduce when unit is closed is discharged from pressure regulator valve, slowly closing pressure regulator valve again after unit is closed, thereby the rising of the water hammer pressure value of restriction Diversion system of hydropower station; On the other hand, because unit remains quick closedown, thereby guaranteed that unit speed rising value is limited in allowed band.
3, the control system of this pressure regulator valve requires lag time little, action accurately, even pressure regulator valve also can be manually when automatically operation is malfunctioning by its unlatching or close, guarantee the pressure lift-off value of diversion system in allowed limits, the valve sets of pressure regulator valve can guarantee safe and reliable, the sensitive stably action of pressure regulator valve.
4, this pressure regulator valve overall structure is simple, and design science is reasonable, and joint is good, and time lag is little, and field adjustable is simple.
Accompanying drawing explanation
Fig. 1 is perspective view of the present invention.
Embodiment
Below in conjunction with accompanying drawing and by specific embodiment, the invention will be further described, and following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
, being arranged on water inlet place of spiral case, the central tube 10 of pressure regulator valve is communicated with spiral case (not shown in FIG.), and the tail end of this central tube is arranged in the sluicing runner 8 of pressure regulator valve.
On described sluicing runner, be shaped with a process Installation hole 6, for installing or repair the pressure regulator valve parts in water outlet pool; Atmosphere on sluicing runner, is also shaped with a vent 7, so that can directly enter in the sluicing runner of pressure regulator valve uniformly.
Central tube tail end in sluicing runner is with outer shaft sleeve one valve pocket 9, by the axial displacement of this valve pocket, can open or the spilled water hole (there is no label) of closing center's pipeline tail end.On valve pocket, symmetry is fixed with two homoaxial pull bars 5, these two pull bars are packed on the fixed base 4 that outer fork arm 3 lower ends, both sides of installing of sluicing runner are fixedly mounted with, fork arm drives two pull bar horizontally-guided operations, thereby makes valve pocket same axial displacement on central tube.
In fork arm upper center, be fixed with a riser 2, piston rod at the upper end of this riser hinge dress servomotor oil cylinder Y1, on this riser below this piston rod, hinge fills one end of a connecting rod 1, the other end hinge of this connecting rod is contained in one end of a rotation arm 11, the middle part hinge of rotation arm is contained on basis, the other end hinge of this rotation arm is contained in one end of pull bar 12, the other end hinge of this pull bar is contained in the upper end of a stator control panel 13, and the upper/lower terminal of this stator control panel cuts with scissors respectively on the piston rod that is contained in two the chain oil cylinder Y2 of hydraulic pressure, Y3.
Servomotor oil cylinder hinge is contained on basis and by valve sets control action, this valve sets consists of stop valve V1, V2, V3, V4, V5 and throttle valve V6, one-way valve V7, the inflow pipeline of V5 pilot pressure oil, V1, V2 control respectively the oil-feed of servomotor oil cylinder, V3, V4 control respectively the oil return of servomotor oil cylinder, and throttle valve V6, one-way valve V7 connect respectively the oil return of servomotor oil cylinder and control its velocity of displacement.
The arrangement of this pressure regulator valve is horizontal layout, and horizontal water inflow and horizontal water outlet, directly drain into tail water.
When the quick closedown of load rejection stator, valve pocket is opened rapidly by connecting rod under turbine gate mechanism effect, thereby makes water in pressure piping directly discharged to tail water, has limited the pressure rise of diversion system.
Working principle of the present invention is:
1. operation (valve V2, V3, V5 are in normally open, and V1, V4 are in normally off) automatically
When unit failure shutdown or removal of load; two the chain oil cylinder Y2 of hydraulic pressure, Y3 control fork arm by pull bar, connecting rod, push-pull arm; the oil of now controlling servomotor Y1 rodless cavity has little time discharged to trim tank under the effect of throttle valve V6; cause and control servomotor Y1 and fork arm hinged place formation fulcrum; fork arm drives pull bar, valve pocket to be moved to the left; valve port is opened, and the water in diversion system passes through large bearing discharged to tail water, thereby has limited the pressure rise of diversion system.
After accidental shutdown or removal of load process complete; turbine gate mechanism is motionless; connecting rod and fork arm hinged place form fulcrum; under the effect of pressure oil; controlling servomotor piston is moved to the left; the oil of rodless cavity flows to trim tank by throttle valve V6, and fork arm drives pull bar, valve pocket to move right, and valve port is closed.
When the normal load shedding of unit, speed regulator main control valve moves to closing direction, operation servomotor of guide vane moves to closing direction, under the effect of pressure oil, controlling servomotor piston is moved to the left, the oil of rodless cavity flows to trim tank by throttle valve V6, and fork arm drives pull bar, valve pocket to keep the trend that moves right, and valve pocket maintains the closed position constant.
When unit start or increasing load, speed regulator main control valve moves to opening direction, and operation servomotor of guide vane moves to opening direction, by pull bar, connecting rod, push-pull arm, controls fork arm, and under the effect of pressure oil, valve pocket maintains the closed position constant.
2. manually operation (valve V5 is in normally open)
If need pressure regulator valve manual-lock, valve V1, V4 close, and valve V2, V3 open; If need pressure regulator valve to open, valve V1, V4 open, and valve V2, V3 close.By adjusting valve V6, regulate the travelling speed of controlling servomotor piston, thereby reach the object of adjusting the pressure regulator valve opening and closing time.
The key point that the present invention deals with problems comprises:
A. by adopting fluid pressure linkage control mode, improve pressure regulator valve action accuracy and Security.
B. adopt sliding bush type new structure, improve the conveyance capacity of pressure regulator valve.
C. by pressure regulator valve and speed regulator mechanical interlocking, allow the action of stator and the accurate joint of the action of pressure regulator valve, reduce lag time, alleviate pipeline rising water pressure rate, protection power station equipment safety.
Claims (3)
1. a pressure regulating valve of water turbine volute casing, the central tube of this pressure regulator valve is communicated with spiral case, the tail end of this central tube is arranged in the sluicing runner of pressure regulator valve, it is characterized in that: the central tube tail end in sluicing runner is with outer shaft sleeve one valve pocket, on valve pocket, symmetry is fixed with two homoaxial pull bars, these two pull bars are packed on the fixed base that the outer lower end, fork arm both sides of installing of sluicing runner is fixedly mounted with, and fork arm drives two pull bar horizontally-guideds operations and makes valve pocket same axial displacement on central tube;
In fork arm upper center, be fixed with a riser, piston rod at the upper end of this riser hinge dress servomotor oil cylinder, on this riser below this piston rod, hinge fills one end of a connecting rod, the other end hinge of this connecting rod is contained in one end of a rotation arm, the middle part hinge of rotation arm is contained on basis, the other end hinge of this rotation arm is contained in one end of pull bar, the other end hinge of this pull bar is contained in the upper end of a stator control panel, and the upper/lower terminal of this stator control panel cuts with scissors respectively and is contained on two chain cylinder piston rods of hydraulic pressure.
2. pressure regulating valve of water turbine volute casing according to claim 1, is characterized in that: on described sluicing runner, be shaped with a process Installation hole, be also shaped with a vent on sluicing runner.
3. pressure regulating valve of water turbine volute casing according to claim 1, it is characterized in that: described servomotor oil cylinder hinge is contained on basis and by valve sets control action, this valve sets is by stop valve V1, stop valve V2, stop valve V3, stop valve V4, stop valve V5 and throttle valve V6, one-way valve V7 forms, the inflow pipeline of stop valve V5 pilot pressure oil, stop valve V1, stop valve V2 controls respectively the oil-feed of servomotor oil cylinder, stop valve V3, stop valve V4 controls respectively the oil return of servomotor oil cylinder, throttle valve V6, one-way valve V7 connects respectively the oil return of servomotor oil cylinder and controls its velocity of displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210005907.8A CN102536619B (en) | 2012-01-06 | 2012-01-06 | Pressure regulating valve of water turbine volute casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210005907.8A CN102536619B (en) | 2012-01-06 | 2012-01-06 | Pressure regulating valve of water turbine volute casing |
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| CN102536619A CN102536619A (en) | 2012-07-04 |
| CN102536619B true CN102536619B (en) | 2014-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210005907.8A Active CN102536619B (en) | 2012-01-06 | 2012-01-06 | Pressure regulating valve of water turbine volute casing |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107065760A (en) * | 2017-06-05 | 2017-08-18 | 峨眉山市驰骋机械制造有限公司 | Power station pressure regulation valve control system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB721289A (en) * | 1951-02-01 | 1955-01-05 | Bendix Aviat Corp | Turbine and pump assembly |
| GB724076A (en) * | 1949-05-03 | 1955-02-16 | Garrett Corp | Improvements in or relating to pressure ratio control devices more particularly for aircraft air conditioning systems |
| CN200958458Y (en) * | 2006-09-29 | 2007-10-10 | 周泰经 | Accident pressure-distributing valve of speed-adjusting system for connected valve hydraulic turbine with valve-core opening fixed |
| CN201326507Y (en) * | 2008-12-16 | 2009-10-14 | 国网新源控股有限公司 | Device for realizing self-resetting function of speed control system of water turbine-generator set |
| CN202031763U (en) * | 2010-06-01 | 2011-11-09 | 上海海洋大学 | Hydraulic variable speed system of wave energy power generation device after optimal design |
| CN202451360U (en) * | 2012-01-06 | 2012-09-26 | 天津电气传动设计研究所 | Water turbine volute pressure regulating valve |
-
2012
- 2012-01-06 CN CN201210005907.8A patent/CN102536619B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB724076A (en) * | 1949-05-03 | 1955-02-16 | Garrett Corp | Improvements in or relating to pressure ratio control devices more particularly for aircraft air conditioning systems |
| GB721289A (en) * | 1951-02-01 | 1955-01-05 | Bendix Aviat Corp | Turbine and pump assembly |
| CN200958458Y (en) * | 2006-09-29 | 2007-10-10 | 周泰经 | Accident pressure-distributing valve of speed-adjusting system for connected valve hydraulic turbine with valve-core opening fixed |
| CN201326507Y (en) * | 2008-12-16 | 2009-10-14 | 国网新源控股有限公司 | Device for realizing self-resetting function of speed control system of water turbine-generator set |
| CN202031763U (en) * | 2010-06-01 | 2011-11-09 | 上海海洋大学 | Hydraulic variable speed system of wave energy power generation device after optimal design |
| CN202451360U (en) * | 2012-01-06 | 2012-09-26 | 天津电气传动设计研究所 | Water turbine volute pressure regulating valve |
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| CN102536619A (en) | 2012-07-04 |
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Address after: 300180 Hedong District, Tianjin Jintang Road, No. 174 Patentee after: TIANJIN RESEARCH INSTITUTE OF ELECTRIC SCIENCE Co.,Ltd. Address before: 300180 Hedong District, Tianjin Jintang Road, No. 174 Patentee before: TIANJIN DESIGN & RESEARCH INSTITUTE OF ELECTRIC DRIVE Co.,Ltd. Address after: 300180 Hedong District, Tianjin Jintang Road, No. 174 Patentee after: TIANJIN DESIGN & RESEARCH INSTITUTE OF ELECTRIC DRIVE Co.,Ltd. Address before: 300180 Hedong District, Tianjin Jintang Road, No. 174 Patentee before: Tianjin Design and Research Institute of Electric Drive |