CN202300822U - Double-feedback positioning type large-flow hydraulic control valve of water turbine speed adjuster - Google Patents
Double-feedback positioning type large-flow hydraulic control valve of water turbine speed adjuster Download PDFInfo
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- CN202300822U CN202300822U CN2011204290397U CN201120429039U CN202300822U CN 202300822 U CN202300822 U CN 202300822U CN 2011204290397 U CN2011204290397 U CN 2011204290397U CN 201120429039 U CN201120429039 U CN 201120429039U CN 202300822 U CN202300822 U CN 202300822U
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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
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Abstract
The utility model provides a double-feedback positioning type large-flow hydraulic control valve of a water turbine speed adjuster. The double-feedback positioning type large-flow hydraulic control valve is characterized in that a piloted control level and a flow amplifying level are manufactured into two parts; an upper piloted control part is of a constant standard structure; and in order to change the oil passing capability of the flow amplifying level, only the diameter of a flow-amplifying-level piston and the drift diameter of a corresponding pipeline need to be changed under the condition that the differential-pressure area delta S of the flow-amplifying-level piston is equal to 13-20cm<2>. Two feedback holes are designed on a flow-amplifying-level bushing, pressure oil is introduced into the lower feedback hole, and return oil is introduced into the upper feedback hole, so that double-feedback piston positioning and hydraulic recentering are realized. The double-feedback positioning type large-flow hydraulic control valve is a main distributing valve with a self-centering function, and has the advantages that the structure is simple, novel and unique, the reliability is high, the flow amplification and the mechanical piston of the piston do not need to be adjusted, the working is stable without drifting, the reliability is improved exponentially, the weight of the flow-amplifying-level piston is reduced, and the frequency response time and dynamic response capability of the flow amplifying level are improved.
Description
Technical field
The utility model relates to the two feedback of a kind of hydrogovernor locate mode high-volume hydraulic control valve, can be used for as big flow proportional control valve and machinery hydraulic pressure control system especially big, large and medium-sized hydrogovernor.This valve is a kind of flow direction and size and the proportional hydrovalve of electrical control signal; Be used for the displacement of mill type cylinder (servomotor) and control guide vanes of water turbine and blade servomotor; Realization belongs to hydraulic transmission and hydrogovernor technical field of hydraulic to the accurate location of mill type cylinder (servomotor) with to the automatic adjusting and the control of the water flow that flows through water turbine.
Background technique
Development along with the water power industry; The appearance of particularly large-scale, super-huge water turbine; Hydrogovernor is had higher requirement, except that require reliability higher, also require quiet, dynamic indicator is superior; And require the reliability of speed regulator increasingly high, otherwise its loss of fault that occurs is difficult to estimate.
Can know the research and the field adjustable experience of speed regulator for many years according to us,, cause guide's controlled stage to be prone to hair fastener because China's hydroelectric power plant's hydraulic equipment is difficult to assurance with oily oily turbidity test; Super-huge water wheels unit machine inertia is big, and therefore low-response, improves the speed of response of speed regulator pilot stage, little to the quick-action property effect of complete machine.Improving the dynamic responding speed of whole system, mainly is the speed of response that improves the flow amplifier stage, i.e. the speed of response of the main servomotor of main control valve control.Therefore, how to simplify the structure of main control valve, improve its control accuracy and speed of response and become focus and the difficult point that the industry is paid close attention to.
As far as water turbine governing, hydrogovernor has experienced the development and progress of various ways.Particularly adopted Digital Technique, constituted " digital speed regulator " at electric control system, and still backward relatively in the mechanical-hydraulic part.At first on oil pressure, the oil pressure of hydraulic pressure industry reaches 31.5Mpa for a long time, and the Large Speed Governor MTP is merely 6.3Mpa, causes main control valve bulky, and complex structure is made difficulty.
At present, main control valve has carried out repeatedly improving, at first by the exposed conduit system of band lever, changes direct linkage type hydraulic pressure integrated morphology into, has then removed pilot valve, and secondary valve is become a step valve, and speed of response is improved.Present main control valve both domestic and external; Basically all be to adopt " setting sleeve+spring " rigidity orientation type, because the rigidity of setting sleeve processing dimension error, particularly spring is difficult to guarantee unanimity; Will inevitably cause drift; And in use unstable, traditional main control valve all need be adjusted mechanical zero, returns processing and assembling simultaneously and has brought great inconvenience.
Summary of the invention
The utility model is limited to present speed regulator hydraulic control system flow, pressure, feedback response slowly, problem such as difficulty in the runback, design a kind of two locate mode high-volume hydraulic control valves that feed back of hydrogovernor that need not adjust mechanical zero.
The technological scheme of the utility model: the big flow control valve of the hydrogovernor of the utility model two feedback locate mode comprises guide's controlled stage and flow amplifier stage; The top of the valve body of bottom flow amplifier stage is connected with the food tray base plate; The cylinder body of top guide's controlled stage is connected on the valve gap, and is connected with the food tray base plate through valve gap; Piston is divided into the guide's controlled stage piston on top and the flow amplifier stage piston of bottom; The piston rod of guide's controlled stage is that contact-type is connected with the end face of the piston rod of flow amplifier stage; The amplifier stage piston of bottom is a differential piston; Valve disc area is greater than following valve disc area on it, and the difference of both areas is Δ S; The area Sk of guide's controlled stage piston is greater than Δ S; Side wall upper part at flow amplifier stage valve body lining is laterally processed two feedback holes; Promptly go up feedback hole and following feedback hole, the distance H 2 of the top edge of last feedback hole to the lower limb of following feedback hole is less than the thickness H1 of valve disc on the flow amplifier stage piston, and two feedback hole places process a vertical feedback control hole on lining; The feedback control hole will be gone up feedback hole and will be communicated with following feedback hole; Straight-through lining upper end, feedback control hole is communicated with multiple middle hydraulic fluid port through high pressure hose, and last feedback hole is shut with following feedback hole outer end; A plurality of hydraulic fluid ports have been processed on the piston bushing; The hydraulic fluid port of top symmetry constitutes A chamber control port, below the hydraulic fluid port of symmetry constitute B chamber control port, the hydraulic fluid port of middle symmetry constitutes pressure oil P chamber; Guide's pilot pressure oil filler opening is communicated with principal pressure oil P chamber through the oil duct on second high pressure hose and the valve body lining sidewall.
The thickness H1 of valve disc on the described flow amplifier stage piston, last feedback hole top edge is the distance H 2 of feedback hole lower limb extremely down, H1-H2=0.1～0.5mm.
The described feedback hole top edge distance H 2 of feedback hole lower limb extremely down, the distance H 3 at the upper and lower edge of control port, flow amplifier stage A chamber, the H2-H3=0.1～0.3mm of going up.
The area S2's of the area S1 of valve disc and following valve disc is poor on the described flow amplifier stage piston: Δ S=S1-S2=13～20cm
2
The area S2's of the area S1 of valve disc and following valve disc is poor on the described flow amplifier stage piston: Δ S=S1-S2, the area of controlled stage piston are Sk, Sk=(2～3) Δ S.
The area S2's of the area S1 of valve disc and following valve disc b is poor on the described flow amplifier stage piston: preferred Δ S=S1-S2=15cm
2
The preferred Sk=3 Δ of the area of described controlled stage piston 3 S.
The described preferred 6mm of diameter that goes up feedback hole and following feedback hole.
Preferably, processed 12 hydraulic fluid ports on the described piston bushing, above 4 hydraulic fluid ports of symmetry constitute A chamber control port, below 4 hydraulic fluid ports of symmetry constitute B chamber control port, 4 hydraulic fluid ports of middle symmetry constitute pressure oil P chambeies.
The utlity model has following good result and characteristics:
1, the utility model adopts " two feedbacks location " to guarantee the location and the precision of flow amplifier stage piston first, promptly on flow amplifier stage lining, designs two feedback holes, and following feedback hole leads to pressure oil; Last feedback hole leads to oil return; Thereby realize " double-fed piston location is during hydraulic pressure is multiple ", reach the main control valve function that tallies with the national condition with " in the runback " function; Simple in structure novel unique, reliability is high.Need not adjust that flow amplifies and piston mechanical location, steady operation does not have drift, has significantly improved reliability.
2, for improving processing technology; Guide's controlled stage and flow amplifier stage are made two; Guide's control section on top is adopted a constant normal structure, change the oil filling capacity of flow amplifier stage, at the differential pressure area of dependable flow amplifier stage pressure drop piston at Δ S=13～20cm
2Following of the condition latus rectum that needs to change flow amplifier stage piston diameter and respective line get final product.
Because flow amplifier stage piston and guide's controlled stage piston are divided into two, alleviated flow amplifier stage piston weight, improved the frequency response time and the dynamic response capability of flow amplifier stage.
3, flow amplifier stage piston adopts differential piston, only needs the control of single chamber, simplifies oil circuit and structure.The end face of two piston rods is nonrigid contact-type Placement, only depends on the differential pressure area Δ S of main differential piston of joining, and produces a tracking power that makes progress, and the steering force of guide's controlled stage piston closely contacts the end face of two piston rods.
4, in order to realize above-mentioned requirements, the oil circuit interface during the feedback of flow amplifier stage is multiple between location oil circuit and control oil channel and pressure oil circuit and the guide's controlled stage adopts high pressure hose to flexibly connect.
5, on structural design, the valve group of guide's controlled stage adopts building blocks overlapping structure, can be combined as modes such as two proportional servo valves, two digital valve, ratio digital valve, dual emergency shutdown according to user's demands of different.
6, flow amplifier stage valve body adopts the seamless steel pipe integral solder to form, and the high duty alloy steel sleeve is inlayed in inside, has strengthened reliability, has reduced processing technology and difficulty.
In a word, the utility model combines pair feedback location oil circuits and control oil channel is total to road technique, two oil circuit feedback is located make zero technology, pilot stage and amplifier stage oil circuit and flexibly connected technology, single chamber hydraulic control technology, has demonstrated fully the originality of the utility model.
Description of drawings
Fig. 1 is the big flow control valve structural representation of hydrogovernor two feedback locate mode of the utility model.
Fig. 2 is the E place partial enlarged drawing of Fig. 1.
Fig. 3 is the structural relation schematic representation of flow amplifier stage piston and lining.
Embodiment
The big flow control valve of hydrogovernor two feedback locate mode like Fig. 1, Fig. 2, Fig. 3 the utility model comprises guide's controlled stage and flow amplifier stage; The top of the valve body 1 of bottom flow amplifier stage is connected with food tray base plate 7; The cylinder body 6 of top guide's controlled stage is connected on the valve gap 4, and guide's controlled stage is connected with food tray base plate 7 through valve gap 4; Piston is divided into the guide's controlled stage piston 3 on top and the flow amplifier stage piston 9 of bottom; Guide's controlled stage piston rod 3.1 is that contact-type is connected with the end face of flow amplifier stage piston rod 9.1; The amplifier stage piston 9 of bottom is a differential piston; Valve disc area 9a is greater than following valve disc area 9b on it, and the difference of both areas is Δ S; The area Sk of guide's controlled stage piston 3 is greater than Δ S; At horizontal processing two feedback holes (Fig. 2) of the side wall upper part of flow amplifier stage valve body lining 2, promptly go up feedback hole 2a and following feedback hole 2b, the top edge of last feedback hole 2a extremely under the distance H 2 of lower limb of feedback hole 2b less than the thickness H1 of valve disc 9a on the flow amplifier stage piston; Vertical feedback control hole 2c of two feedback hole place processing on lining 2, feedback control hole 2c is communicated with two horizontal feedback holes, and feedback control hole 2c leads directly to lining 2 upper ends; Be communicated with multiple middle hydraulic fluid port 5 through high pressure hose 5a; Last feedback hole 2a shuts (Fig. 2) with following feedback hole 2b outer end, a plurality of hydraulic fluid ports of processing on the piston bushing 2, preferably; 12 hydraulic fluid ports have been processed; 4 hydraulic fluid ports of top symmetry constitute A chamber control port, below 4 hydraulic fluid ports of symmetry constitute B chamber control port, 4 hydraulic fluid ports of middle symmetry constitute principal pressure oil P chambeies; Guide's pilot pressure oil filler opening 8 is communicated with principal pressure oil P chamber through the oil duct 2d on the second high pressure hose 8a and valve body lining 2 sidewalls.
When the neutral position of flow amplifier stage piston 9 at lining 2; A, the control port of B chamber will be shut, and (servomotor is in Fig. 1,4 frame of broken lines to carry out oil cylinder; Down together) piston does not move; When the top position of flow amplifier stage piston 9 at lining 2, principal pressure oil P flows out to an end of carrying out oil cylinder (servomotor) through the control port of A chamber, and the other end of carrying out oil cylinder (servomotor) flow to oil return inlet T control through the control port of B chamber and carries out oil cylinder (servomotor) piston to an end motion.Otherwise; When the lower position of flow amplifier stage piston 9 at lining 2; Principal pressure oil P flows out to the other end of carrying out oil cylinder (servomotor) through the control port of B chamber, and an end of carrying out oil cylinder (servomotor) flow to oil return inlet T control through the control port of A chamber and carries out oil cylinder (servomotor) piston to an other end motion.
Two feedbacks link to each other the flow amplifier stage through high pressure hose with control oil channel 5a and guide's pilot pressure oil circuit 8a with guide's controlled stage.
The thickness H1 of valve disc 9a on the described flow amplifier stage piston, last feedback hole 2a top edge is the distance H 2 of feedback hole 2b lower limb extremely down, H1-H2=0.1～0.5mm.
The described feedback hole 2a top edge distance H 2 of feedback hole 2b lower limb extremely down, the distance H 3 at the upper and lower edge of control port, flow amplifier stage A chamber, the H2-H3=0.1～0.3mm of going up.
The area S2's of the area S1 of valve disc 9a and following valve disc 9b is poor on the described flow amplifier stage piston: Δ S=S1-S2=13～20cm
2, preferred Δ S=S1-S2=15cm
2
The area S2's of the area S1 of valve disc 9a and following valve disc 9b is poor on the described flow amplifier stage piston: Δ S=S1-S2, the area of controlled stage piston 3 are Sk, Sk=(2～3) Δ S, preferred Sk=3 Δ S.
The described diameter of going up feedback hole 2a and following feedback hole 2b is 6mm.
Do-part is the servomotor of hydraulic jack or water turbine.The effect of hydraulic jack is to amplify through hydraulic pressure to carry out hydraulic transmission, and the servomotor of water turbine is used for promoting the aperture of guide vanes of water turbine and blade, realizes adjusting and control to water wheels generating unit speed or flow.
The utility model at first is divided into two with piston on structural design, top is guide's controlled stage piston; Guide's controlled stage piston is the control of single chamber, and the below of its valve disc and oil return are connected, and the top is the control chamber of piston; The valve disc area of guide's controlled stage piston is greater than the differential pressure area of flow amplifier stage differential piston, when connecting with pressure oil, overcome the upward force of flow amplifier stage piston after; Descent of piston; When connecting with oil return, after the upward force that the differential pressure area of flow amplifier stage piston produces overcomes the frictional force of pilot stage piston, piston stroking upward.Therefore, the bottom is to have no between guide's controlled stage piston on flow amplifier stage piston and top to be rigidly connected.The flow amplifier stage piston of bottom is a differential piston, and last valve disc is Δ S=S1-S2 with the differential pressure area of following valve disc, produces a hydraulic pressure that makes progress behind the cut-in pressure oil and follows the tracks of power; The upper and lower part piston rod is closely contacted; Not only alleviated the weight of main piston, improved the quick-action property of main control valve, and improved processing technology; A complete main control valve is divided into upper and lower two big parts, and can be with guide's control section on top as an invariable normal structure.And the flow enlarged portion of bottom can be selected the diameter (diameter series is 80mm, 100mm, 150mm, 200mm, 250mm) of main control valve according to unit capacity.In design, only need to guarantee that the different-diameter master joins consistent the getting final product of differential pressure area Δ S of the differential piston of valve, can reduce production difficulty and process-cycle like this.
Flow amplifier stage valve body, lining, piston are that the needs according to the usefulness oil mass of oil cylinder (servomotor) are variable, and other component adopt constant normal structure.
Learn by Fig. 3, between last feedback hole 2a and superposed oil back chamber T of following feedback hole 2b and the principal pressure oil pocket P, when flow amplifier stage piston 9 is in centre of equilibrium line O
1-O
2The equilibrium position time, the last valve disc 9a of amplifier stage piston 9 just will go up feedback hole 2a and following feedback hole 2b and cover.Promptly be in centre of equilibrium line O at flow amplifier stage piston 9
1-O
2The equilibrium position time, last feedback hole 2a and following feedback hole 2b are closed.The thickness of valve disc 9a is greater than the upper and lower Edge Distance of the last feedback hole 2a on the lining 2 and two feedback holes of following feedback hole 2b on the flow amplifier stage piston; The upper and lower Edge Distance of last feedback hole 2a and following feedback hole 2b is greater than the distance at the upper and lower edge of A chamber hydraulic fluid port, and last feedback hole 2a and following feedback hole 2b close and just mean that A chamber hydraulic fluid port closes fully.Therefore, when flow amplifier stage piston 9 rose, following feedback hole 2b was opened and communicates with principal pressure oil pocket P, and pressure oil promptly forces piston 9 to descend.Otherwise when amplifier stage piston 9 descended, last feedback hole 2a was opened and communicates with oil back chamber T, forced amplifier stage piston 9 to rise, and this has just realized Hydraulic Double feedback one on the other, makes amplifier stage piston 9 always be in centre of equilibrium line O automatically
1-O
2The equilibrium position, improved Location accuracy, realized zero shift.
The big flow control valve of the hydrogovernor of the utility model two feedback locate mode comes down to a big flow proportion valve of two feedbacks.System pressure oil and oil return all can be used as feedback control source, so be " two feedback "; General Proportional valve; Pressure and latus rectum are all less, and the big flow control valve latus rectum of the hydrogovernor of the utility model two feedback locate mode can reach 80mm, 100mm, 150mm, 200mm, 250mm, and pressure can reach 31.5MPa; Flow and pressure range improve greatly, are to be " big flow control valve ".Through principle innovation, process modification, the big flow control valve of the hydrogovernor of the utility model two feedback locate mode not only can be used for water power speed regulator field, and the oilhydraulic engineering that also can be widely used in fields such as iron and steel, metallurgy, the energy, chemical industry is used.
Claims (9)
1. big flow control valves of a hydrogovernor two feedback locate mode; Comprise guide's controlled stage and flow amplifier stage; The top of the valve body (1) of bottom flow amplifier stage is connected with food tray base plate (7); The cylinder body (6) of top guide's controlled stage is connected on the valve gap (4), and is connected with food tray base plate (7) through valve gap (4); Piston is divided into the guide's controlled stage piston (3) on top and the flow amplifier stage piston (9) of bottom; The piston rod of guide's controlled stage (3.1) is that contact-type is connected with the end face of the piston rod (9.1) of flow amplifier stage; The amplifier stage piston (9) of bottom is a differential piston; Valve disc area (9a) is greater than following valve disc area (9b) on it, and the difference of both areas is Δ S; The area Sk of guide's controlled stage piston (3) is greater than Δ S; Side wall upper part at flow amplifier stage valve body lining (2) is laterally processed two feedback holes; Promptly go up feedback hole (2a) and following feedback hole (2b), the distance H 2 of the top edge of last feedback hole (2a) to the lower limb of following feedback hole (2b) is less than the thickness H1 of valve disc (9a) on the flow amplifier stage piston, in vertical feedback control hole (2c) of processing, last two the feedback hole places of lining (2); Feedback control hole (2c) will be gone up feedback hole (2a) and will be communicated with following feedback hole (2b); Straight-through lining (2) upper end, feedback control hole (2c) is communicated with multiple middle hydraulic fluid port (5) through high pressure hose (5a), and shut last feedback hole (2a) and following feedback hole (2b) outer end; Piston bushing has been processed a plurality of hydraulic fluid ports on (2); The hydraulic fluid port of top symmetry constitutes A chamber control port, below the hydraulic fluid port of symmetry constitute B chamber control port, the hydraulic fluid port of middle symmetry constitutes pressure oil P chamber; Guide's pilot pressure oil filler opening (8) is communicated with principal pressure oil P chamber through the oil duct (2d) on second high pressure hose (8a) and valve body lining (2) sidewall.
2. the big flow control valve of hydrogovernor according to claim 1 two feedback locate mode; It is characterized in that: the thickness H1 of valve disc (9a) on the flow amplifier stage piston; Last feedback hole (2a) top edge is the distance H 2 of feedback hole (2b) lower limb extremely down, H1-H2=0.1～0.5mm.
3. the big flow control valve of hydrogovernor according to claim 1 and 2 two feedback locate mode; It is characterized in that: go up feedback hole (2a) the top edge distance H 2 of feedback hole (2b) lower limb extremely down; The distance H 3 at the upper and lower edge of control port, flow amplifier stage A chamber, H2-H3=0.1～0.3mm.
4. the big flow control valve of hydrogovernor according to claim 1 and 2 two feedback locate mode is characterized in that: the area S2's of the area S1 of valve disc (9a) and following valve disc (9b) is poor on the flow amplifier stage piston: Δ S=S1-S2=13～20cm
2
5. the big flow control valve of hydrogovernor according to claim 1 and 2 two feedback locate mode; It is characterized in that: the area S2's of the area S1 of valve disc (9a) and following valve disc (9b) is poor on the flow amplifier stage piston: Δ S=S1-S2; The area of controlled stage piston (3) is Sk, Sk=(2～3) Δ S.
6. the big flow control valve of hydrogovernor according to claim 4 two feedback locate mode is characterized in that: the area S2's of the area S1 of valve disc (9a) and following valve disc (9b) is poor on the flow amplifier stage piston: Δ S=S1-S2=15cm
2
7. the big flow control valve of hydrogovernor according to claim 5 two feedback locate mode is characterized in that: the area Sk=3 Δ S of controlled stage piston (3).
8. the big flow control valve of hydrogovernor according to claim 1 and 2 two feedback locate mode, it is characterized in that: the diameter of going up feedback hole (2a) and following feedback hole (2b) is 6mm.
9. the big flow control valve of hydrogovernor according to claim 1 and 2 two feedback locate mode; It is characterized in that: processed 12 hydraulic fluid ports on the piston bushing (2); 4 hydraulic fluid ports of top symmetry constitute A chamber control port; 4 hydraulic fluid ports of following symmetry constitute B chamber control port, and 4 hydraulic fluid ports of middle symmetry constitute pressure oil P chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204290397U CN202300822U (en) | 2011-11-03 | 2011-11-03 | Double-feedback positioning type large-flow hydraulic control valve of water turbine speed adjuster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204290397U CN202300822U (en) | 2011-11-03 | 2011-11-03 | Double-feedback positioning type large-flow hydraulic control valve of water turbine speed adjuster |
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| Publication Number | Publication Date |
|---|---|
| CN202300822U true CN202300822U (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204290397U Withdrawn - After Issue CN202300822U (en) | 2011-11-03 | 2011-11-03 | Double-feedback positioning type large-flow hydraulic control valve of water turbine speed adjuster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202300822U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364088A (en) * | 2011-11-03 | 2012-02-29 | 武汉三联水电控制设备有限公司 | Double-feedback positioning high-flow hydraulic control valve and control system of turbine governor |
| CN108468616A (en) * | 2018-02-05 | 2018-08-31 | 中国长江电力股份有限公司 | Position method of adjustment in a kind of governor proportioning valve based on Hydrawlic Slave System static balancing |
-
2011
- 2011-11-03 CN CN2011204290397U patent/CN202300822U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364088A (en) * | 2011-11-03 | 2012-02-29 | 武汉三联水电控制设备有限公司 | Double-feedback positioning high-flow hydraulic control valve and control system of turbine governor |
| CN102364088B (en) * | 2011-11-03 | 2013-07-24 | 武汉三联水电控制设备有限公司 | Double-feedback positioning high-flow hydraulic control valve and control system of turbine governor |
| CN108468616A (en) * | 2018-02-05 | 2018-08-31 | 中国长江电力股份有限公司 | Position method of adjustment in a kind of governor proportioning valve based on Hydrawlic Slave System static balancing |
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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: Wuhan Guoce S.L. Hydroelectric Equipment Co., Ltd. Assignor: Wuhan S. L. Hydropower Control Equipment Co., Ltd. Contract record no.: 2012420000153 Denomination of utility model: Double-feedback positioning high-flow hydraulic control valve and control system of turbine governor Granted publication date: 20120704 License type: Exclusive License Record date: 20120927 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120704 Effective date of abandoning: 20130724 |
|
| RGAV | Abandon patent right to avoid regrant |