CN103306888A - Hydraulic control type main pressure distributing valve with sequence closing function - Google Patents
Hydraulic control type main pressure distributing valve with sequence closing function Download PDFInfo
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- CN103306888A CN103306888A CN2013102485553A CN201310248555A CN103306888A CN 103306888 A CN103306888 A CN 103306888A CN 2013102485553 A CN2013102485553 A CN 2013102485553A CN 201310248555 A CN201310248555 A CN 201310248555A CN 103306888 A CN103306888 A CN 103306888A
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention belongs to the field of water turbine governors, and particularly relates to a hydraulic control type main pressure distributing valve with a sequence closing function. The main pressure distributing valve comprises a main valve plug, and is characterized by further comprising a hydraulic oil cylinder directly or indirectly connected with the main valve plug and pushing the main valve plug to act, and the hydraulic oil cylinder moves during sequence closing of a water turbine. According to the main pressure distributing valve, the hydraulic oil cylinder and an adjusting rod for the sequence closing are additionally arranged on the conventional main pressure distributing valve, so that the sequence closing function is integrated; the cost of independently manufacturing a sequence closing device and the cost of site construction are lowered; a site mounting space is reduced; and the pressure loss in a system is reduced.
Description
Technical field
The invention belongs to the hydrogovernor field, be specifically related to a kind of hydraulic control main distributing valve with sequence closing function.
Background technique
Main control valve is the power stage hydraulic pressure amplifier stage of hydrogovernor machinery hydraulic system, it zooms into respective direction, proportional with it, as to satisfy servomotor traffic requirement hydraulic pressure signal with mechanical displacement or the hydraulic control signal of electro-control converter, control servomotor unlatching or close.Main control valve promotes servomotor and then promotes hydroturbine water intake mouth stator, with the control of realization to the hydroturbine water intake flow, thereby reaches the purpose of controlling rotational speed of water turbine.
Subsection and closed device be guarantee to have long conduit pipe the hydraulic generator unit under the process of shutdown fast, the water pressure of diversion system can not exceed setting value, it will guarantee that the rotating speed of hydraulic generator unit is unlikely too high on the other hand.Its concrete implementation is: when the hydraulic generator unit begins to shut down fast, the guide vane opening of control water turbine water flow can be from actual aperture to the complete shut-down position, utilize the rate of discharge of subsection and closed device control guide vane servomotor, the closing velocity of stator then can be set, usually make the shutdown rate of stator (as 30% aperture) this section stroke from 100% aperture to flex point very fast, can descend fast with the rotating speed that guarantees the hydraulic generator unit, slower to the shutdown rate of complete shut-down position from flex point, be no more than setting value with the water pressure that guarantees conduit pipe.
Water power plant speed regulator main control valve and subsection and closed device adopt two individual components at present, and subsection and closed device is serially connected with between main control valve and servomotor.When shutting down fast, main control valve places the fastest shutdown attitude, and to the flex point section, subsection and closed device withdraws from guide vane opening from fully open position, only relies on the quick closedown of main control valve control servomotor; When slowly shutting down, subsection and closed device drops into, and forms throttling in system, and the control servomotor slowly cuts out.
Said apparatus has following shortcoming: the increase of cost, and existing subsection and closed device adopts self-contained unit, causes the increase of processing and installation cost; On-the-spot required installing space is big, difficult arrangement; Exist certain pressure to fall at the subsection and closed device valve port, cause the pressure loss in the system.
Summary of the invention
The object of the present invention is to provide a kind of hydraulic control main distributing valve with sequence closing function that solves problems such as cost increase that present main control valve and subsection and closed device adopt two self-contained units to cause, difficulty in installation and layout, system pressure loss increase.
For achieving the above object, the technical solution used in the present invention is:
A kind of hydraulic control main distributing valve with sequence closing function comprises main valve plug, it is characterized in that: also comprise the hydraulic jack that directly or indirectly is connected and promotes main valve plug segmentation action with main valve plug.
Described hydraulic jack moves when the water turbine sequence closing.
Aforesaid a kind of hydraulic control main distributing valve with sequence closing function also comprises the control chamber piston and the constant voltage chamber piston that are fixed in the main valve plug both sides, and hydraulic jack is arranged at the end of control chamber piston or constant voltage chamber piston.
Aforesaid a kind of hydraulic control main distributing valve with sequence closing function, also comprise the collision block that is fixed in constant voltage chamber piston, collision block is relative with the hydraulic jack position, guide vane opening arrives flex point when water turbine shuts down, after hydraulic oil port connects pressure oil, hydraulic jack moves to collision block, promotes collision block and moves and then promote constant voltage chamber piston and main valve plug action.
Aforesaid a kind of hydraulic control main distributing valve with sequence closing function, the adjustable lever that also comprises restriction hydraulic jack displacement distance, adjustable lever is relative with the position of hydraulic jack, and the crow flight distance between hydraulic jack and the adjustable lever is greater than the crow flight distance between hydraulic jack and the collision block.
Aforesaid a kind of hydraulic control main distributing valve with sequence closing function also comprises the upper end cap that is connected with constant voltage chamber piston, the segmentation seat that is fixed in upper end cap.
Aforesaid a kind of hydraulic control main distributing valve with sequence closing function also comprises hydraulic control unit, and hydraulic control unit is connected with constant voltage accent, control accent, hydraulic oil port respectively; Hydraulic oil port promotes the hydraulic jack action as external control interface and the pipeline of hydraulic jack from hydraulic oil port injection pressure oil.In like manner, the relation in control accent and control chamber, constant voltage accent and constant voltage chamber is equal to the relation of hydraulic oil port and hydraulic jack.
Aforesaid a kind of hydraulic control main distributing valve with sequence closing function, also comprise being positioned at upper end upper part of the cover positioning block, the available machine time adjusting nut that is positioned at the positioning block both sides and off time adjusting nut, available machine time adjusting nut, off time adjusting nut respectively and the distance between the positioning block adjustable.
Aforesaid a kind of hydraulic control main distributing valve with sequence closing function, when main control valve moved automatically, hydraulic oil port took back oil, and the pressure of hydraulic control unit control control accent is to drive the main valve plug action.
Aforesaid a kind of hydraulic control main distributing valve with sequence closing function, when the main control valve emergency shutdown, hydraulic oil port takes back oil, and the control accent takes back oil, and main valve plug moves under the pressure effect of constant voltage accent.
Aforesaid a kind of hydraulic control main distributing valve with sequence closing function, when the main control valve sequence closing, phase I is quick shutdown process: hydraulic oil port takes back oil, the pressure control action of the controlled accent of main valve plug, and the off time adjusting nut is butted on positioning block; When arriving the segmentation flex point, the slow shutdown process of beginning second stage: hydraulic oil port connects pressure oil and controls accent simultaneously and take back oil, and hydraulic jack moves, and promotes the collision block band and main valve plug and move, when hydraulic jack keeps stable after adjustable lever institute extreme position.
The present invention increases sequence closing with hydraulic jack, adjustable lever at conventional main control valve, and integrated sequence closing function has reduced that subsection and closed device is made separately and the cost of site operation, has reduced on-the-spot installing space, has reduced the pressure loss in the system.
Description of drawings
Fig. 1 is structural drawing of the present invention;
Fig. 2 is the amplification assumption diagram of subsection and closed device of the present invention;
Wherein lower end cap 1, control chamber piston 2, valve body 3, valve pocket 4, main valve plug 5, flange 6, constant voltage chamber piston 7, upper end cap 8, available machine time adjusting nut 9 (a), off time adjusting nut 9 (b), positioning block 10, hydraulic control unit 11, segmentation oil cylinder 12, segmentation seat 13, sectional-regulated bar 14, segmentation collision block 15.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.Following examples only are used for technological scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.
Main control valve structural principle of the present invention as shown in Figures 1 and 2, Fig. 2 is the partial enlarged drawing of I part among Fig. 1.Among the present invention " segmentation " of segmentation oil cylinder, segmentation seat, sectional-regulated bar and segmentation collision block, segmentation hydraulic fluid port do not refer to that segmentation oil cylinder, segmentation seat, sectional-regulated bar and segmentation collision block, hydraulic fluid port are divided into some sections compositions, and refer to the sequence closing for main control valve.Segmentation oil cylinder in this specification is hydraulic jack, and sectional-regulated bar is adjustable lever, and the segmentation collision block is collision block, and the segmentation hydraulic fluid port is hydraulic oil port.
Main control valve is vertical structure, and main valve plug 5 tops are that constant voltage chamber piston 7, bottom are control chamber piston 2, and control chamber piston 2 areas are greater than constant voltage chamber piston 7 areas.Constant voltage chamber piston 7 is threaded with main valve plug 5 employings and locks, and control chamber piston 2 is independent with main valve plug 5.Constant voltage chamber H normal open system pressure oil is controlled the action of main valve plug 5 by the pressure of hydraulic control unit 11 change control chamber C.Be provided with valve port at valve pocket 4, realize the adjusting of valve port openings of sizes by the action of main valve plug 5, open, close and regulate and speed control with the power device that achieves a butt joint.Main valve plug 5 neutral positions (position that Fig. 1 shows is the neutral position) are upwards corresponding to the servomotor opening state, downwards corresponding to the servomotor closed condition.Main valve plug 5 departs from the neutral position apart from more many, and the hydraulic fluid flow rate of valve port process is more big, and speed is more fast.
Available machine time adjusting nut 9 (a), off time adjusting nut 9 (b) are positioned at upper end cap 8 tops and are distributed in positioning block 10 both sides.Regulate the limit position of main valve plug 5 by the spacing of regulating 10 of available machine time adjusting nut 9 (a), off time adjusting nut 9 (b) and positioning blocks respectively to realize the restriction of the fastest startup and shutdown speed.
Main control valve of the present invention has automatic operation, the emergency stop function of conventional main control valve, and increases the sequence closing function.
AutoPlay function is specially, and segmentation hydraulic fluid port FD takes back oil, and the pressure of hydraulic control unit 11 control control chamber C mouths realizes that the action of main valve plug 5 is to realize the automatic operation of main control valve.
Emergency stop function is specially, and segmentation hydraulic fluid port FD takes back oil, and control chamber C mouth takes back oil, and main valve plug 5 is action downwards under the pressure effect of constant voltage chamber H mouth, the servomotor shutdown.
The sequence closing function is specially, and sequence closing is shutdown fast for first section, and segmentation hydraulic fluid port FD takes back oil, the pressure control action downwards of the controlled chamber of main valve plug C mouth, and the off time, adjusting nut 9b was butted on positioning block 10, realized shutdown fast; When arriving the segmentation flex point, segmentation hydraulic fluid port FD welding system pressure oil control chamber C mouth simultaneously takes back oil, segmentation oil cylinder 12 moves upward, promote segmentation collision block 15 and be with upwards action of main valve plug 5, when segmentation oil cylinder 12 moves to by 14 thresold extreme position of sectional-regulated bar, keep stable, it is stable that segmentation collision block 15 also keeps, to realize that servomotor slowly shuts down.
It should be noted that the technological scheme that is equal to mutually with the present invention comprises: change sequence closing oil cylinder position, as place the control chamber underpart of the piston rod; Segmentation seat and upper end cap or lower end cap are processed into one; Do not use the segmentation collision block, adopt constant voltage chamber piston, control chamber piston to be processed into stepped; The segmentation oil cylinder promotes constant voltage chamber piston or control chamber pistons end even directly promotes the spool action, and constant voltage chamber piston, control chamber piston also are appreciated that into a kind of form of hydraulic jack; The limit position of employing additive method restriction sequence closing oil cylinder; The employing additive method limit switch machine time;
Adopt additive method control spool to move; Constant voltage chamber piston, control chamber piston, spool is made of one or certain two-part one or three are all independent fully; Hydraulic control unit can be integrated in one with main control valve, also can be used as individual components, and hydraulic control unit is not the necessary constituent element of main control valve.
Show more than and described basic principle of the present invention, major character and advantage of the present invention that the technician of the industry should understand.The present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (9)
1. the hydraulic control main distributing valve with sequence closing function comprises main valve plug, it is characterized in that: also comprise the hydraulic jack that directly or indirectly is connected and promotes main valve plug realization segmentation action with main valve plug.
2. a kind of hydraulic control main distributing valve with sequence closing function according to claim 1, it is characterized in that: also comprise the control chamber piston and the constant voltage chamber piston that are fixed in the main valve plug both sides, hydraulic jack is arranged at the end of control chamber piston or constant voltage chamber piston.
3. a kind of hydraulic control main distributing valve with sequence closing function according to claim 1 and 2, it is characterized in that: also comprise the collision block that is fixed in constant voltage chamber piston, collision block is relative with the hydraulic jack position, guide vane opening arrives flex point when water turbine shuts down, after hydraulic oil port connects pressure oil, hydraulic jack moves to collision block, promotes collision block and moves and then promote constant voltage chamber piston and main valve plug action.
4. a kind of hydraulic control main distributing valve with sequence closing function according to claim 3, it is characterized in that: the adjustable lever that also comprises restriction hydraulic jack displacement distance, adjustable lever is relative with the position of hydraulic jack, and the crow flight distance between hydraulic jack and the adjustable lever is little of the crow flight distance between hydraulic jack and the collision block.
5. a kind of hydraulic control main distributing valve with sequence closing function according to claim 1 is characterized in that: also comprise hydraulic control unit, hydraulic control unit is connected with constant voltage accent, control accent, hydraulic oil port respectively.
6. a kind of hydraulic control main distributing valve with sequence closing function according to claim 5, it is characterized in that: also comprise being positioned at upper end upper part of the cover positioning block, the available machine time adjusting nut that is positioned at the positioning block both sides and off time adjusting nut, available machine time adjusting nut, off time adjusting nut respectively and the distance between the positioning block adjustable.
7. a kind of hydraulic control main distributing valve with sequence closing function according to claim 5, it is characterized in that: when main control valve moved automatically, hydraulic oil port took back oil, and the pressure of hydraulic control unit control control accent is to drive the main valve plug action.
8. a kind of hydraulic control main distributing valve with sequence closing function according to claim 5, it is characterized in that: when the main control valve emergency shutdown, hydraulic oil port takes back oil, and the control accent takes back oil, and main valve plug moves under the pressure effect of constant voltage accent.
9. a kind of hydraulic control main distributing valve with sequence closing function according to claim 5, it is characterized in that, when the water turbine sequence closing, phase I is quick shutdown process: hydraulic oil port takes back oil, the pressure control action of the controlled accent of main valve plug, the off time adjusting nut is butted on positioning block; When arriving the segmentation flex point, the slow shutdown process of beginning second stage: hydraulic oil port connects pressure oil and controls accent simultaneously and take back oil, and hydraulic jack moves, and promotes the collision block band and main valve plug and move, when hydraulic jack keeps stable after adjustable lever institute extreme position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310248555.3A CN103306888B (en) | 2013-06-21 | 2013-06-21 | A kind of hydraulic control main distributing valve with sequence closing function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310248555.3A CN103306888B (en) | 2013-06-21 | 2013-06-21 | A kind of hydraulic control main distributing valve with sequence closing function |
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| CN103306888A true CN103306888A (en) | 2013-09-18 |
| CN103306888B CN103306888B (en) | 2015-10-07 |
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| CN201310248555.3A Active CN103306888B (en) | 2013-06-21 | 2013-06-21 | A kind of hydraulic control main distributing valve with sequence closing function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015640A (en) * | 2016-06-06 | 2016-10-12 | 哈尔滨电机厂有限责任公司 | Main distributing valve with mechanical hydraulic positioning function |
| CN106089561A (en) * | 2016-06-20 | 2016-11-09 | 哈尔滨电机厂有限责任公司 | Large-scale pumped storage power unit Double-working-condition speed regulator main control valve |
| CN109139352A (en) * | 2018-11-06 | 2019-01-04 | 贵州电网有限责任公司 | A kind of judgement hydrogovernor master matches the device and measurement method of tripping |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5569770A (en) * | 1978-11-20 | 1980-05-26 | Hitachi Ltd | Pump turbine control device |
| CN2460741Y (en) * | 2000-11-09 | 2001-11-21 | 武汉三联水电控制设备公司 | Hydraulic section shutting off device |
| CN2886156Y (en) * | 2005-11-02 | 2007-04-04 | 武汉聚能电气有限公司 | Flow control type hydraulic main distributing valve capable of automatically returning to center |
| CN2893205Y (en) * | 2006-03-23 | 2007-04-25 | 姚景友 | Multi-protection emergency stop valve |
| US20080053212A1 (en) * | 2004-11-08 | 2008-03-06 | Brennan William E Iii | Flow Control Valve and Method |
| CN201730733U (en) * | 2010-08-13 | 2011-02-02 | 天津市科音自控设备有限公司 | Section closing executive device for hydro turbine governing system |
| CN201916109U (en) * | 2011-01-25 | 2011-08-03 | 国网电力科学研究院 | Subsection closing device for hydroelectric generating set |
| CN202431992U (en) * | 2011-11-25 | 2012-09-12 | 天津市科音自控设备有限公司 | Embedded broken line closing execution valve |
-
2013
- 2013-06-21 CN CN201310248555.3A patent/CN103306888B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5569770A (en) * | 1978-11-20 | 1980-05-26 | Hitachi Ltd | Pump turbine control device |
| CN2460741Y (en) * | 2000-11-09 | 2001-11-21 | 武汉三联水电控制设备公司 | Hydraulic section shutting off device |
| US20080053212A1 (en) * | 2004-11-08 | 2008-03-06 | Brennan William E Iii | Flow Control Valve and Method |
| CN2886156Y (en) * | 2005-11-02 | 2007-04-04 | 武汉聚能电气有限公司 | Flow control type hydraulic main distributing valve capable of automatically returning to center |
| CN2893205Y (en) * | 2006-03-23 | 2007-04-25 | 姚景友 | Multi-protection emergency stop valve |
| CN201730733U (en) * | 2010-08-13 | 2011-02-02 | 天津市科音自控设备有限公司 | Section closing executive device for hydro turbine governing system |
| CN201916109U (en) * | 2011-01-25 | 2011-08-03 | 国网电力科学研究院 | Subsection closing device for hydroelectric generating set |
| CN202431992U (en) * | 2011-11-25 | 2012-09-12 | 天津市科音自控设备有限公司 | Embedded broken line closing execution valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015640A (en) * | 2016-06-06 | 2016-10-12 | 哈尔滨电机厂有限责任公司 | Main distributing valve with mechanical hydraulic positioning function |
| CN106089561A (en) * | 2016-06-20 | 2016-11-09 | 哈尔滨电机厂有限责任公司 | Large-scale pumped storage power unit Double-working-condition speed regulator main control valve |
| CN109139352A (en) * | 2018-11-06 | 2019-01-04 | 贵州电网有限责任公司 | A kind of judgement hydrogovernor master matches the device and measurement method of tripping |
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| Publication number | Publication date |
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| CN103306888B (en) | 2015-10-07 |
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Effective date of registration: 20171117 Address after: 100761 West Chang'an Avenue, Beijing, No. 86, No. Co-patentee after: State Grid Electric Power Research Insititute Patentee after: State Grid Corporation of China Co-patentee after: NARI Technology Development Co., Ltd. Address before: 100761 West Chang'an Avenue, Beijing, No. 86, No. Co-patentee before: State Grid Electric Power Research Insititute Patentee before: State Grid Corporation of China Co-patentee before: Nanjing Nari Co., Ltd. |