CN209100190U - A kind of overspeed protection and volume control device for hydroenergy storage station - Google Patents
A kind of overspeed protection and volume control device for hydroenergy storage station Download PDFInfo
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- CN209100190U CN209100190U CN201821602984.0U CN201821602984U CN209100190U CN 209100190 U CN209100190 U CN 209100190U CN 201821602984 U CN201821602984 U CN 201821602984U CN 209100190 U CN209100190 U CN 209100190U
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- pressure
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Abstract
The utility model discloses a kind of overspeed protections and volume control device for hydroenergy storage station, belong to water-storage technical field, including the first inserted valve, second inserted valve, first sequence closing inserted valve and the second sequence closing inserted valve, it is characterized by also including oil return boxes, pilot-operated type electro-hydraulic reversing valve, first sequence closing pilot solenoid valve, second sequence closing pilot solenoid valve, first accident inserted valve and the second accident inserted valve, first inserted valve and the first accident inserted valve are connected to servomotor and close on chamber, second accident inserted valve is connect with oil return box, pilot-operated type electro-hydraulic reversing valve respectively with the first accident inserted valve, second accident inserted valve, the connection of the control chamber of first inserted valve and the second inserted valve.The utility model is by accident inserted valve and sequence closing inserted valve and sequence closing pilot solenoid valve is highly integrated is integrated, and reduces the connection of oil pipe line, avoids the drawback more than leak source, improves unit operational reliability and safety.
Description
Technical field
The utility model relates to arrive water-storage technical field more particularly to a kind of guarantor that overruns for hydroenergy storage station
Shield and volume control device.
Background technique
Overspeed protection and volume control device are the key that hydropower scheduling protection equipment, and main function is:
Unit failure closing, overrun closing and the closing of servomotor multistage rate.Emergency episode occurs in unit, governor cannot be closed normally
Machine, in the case that guide vane servomotor can not close in time, the revolving speed of unit can quickly rise to runaway speed, in order to limit unit
It overruns, avoid winged anecdote therefore occurs, accident protection or mechanic over speed protection device protect calculating according to unit tune in the case
Shutdown rate requires timely guide vane closing servomotor, protects the safety of unit.
Sequence closing is also the important device that power station requires.The requirement calculated is protected according to unit tune, the hydraulic turbine is urgent
During shutdown, rate cannot be too fast, to prevent the destruction because of water hammer effect to runner.Pump-storage generator is due to water
Turbine and two kinds of water pump different operating conditions, the requirement for opening and closing rule to unit are different from general Hydropower Plant；Not
It is not quite similar with the shutdown rate and mode that under operating condition, unit is required；In addition, machine under unlatching rate and each operating condition that unit requires
The most fast shutdown rate of group is not also identical.
Existing emergency closure and two sections of closing devices are not able to satisfy pump-storage generator multi-speed on domestic and international market at present
The requirement of rate startup-shutdown, emergency shutdown and overspeed protection comprehensively control, it is different degrees of there is each function valve group arrangements excessively
Not the phenomenon that dispersion, machinery adjustment precision is not high and adjusting is very inconvenient, will cause setting point drift after long-play.Some
The logic control mode that valve group electrically and mechanically combines is excessively complicated, function define it is unintelligible, to monitoring system long-term safety transport
Row causes risk.Each function valve group installation site dispersion will also result in complicated, the too long connecting tube of system pipeline arrangement simultaneously
The problems such as road is also easy to cause leakage point mostly too long with the valve group response time, and system mode switches not in time；Excessive connecting tube
Mouth, control oil pipe connector easily cause the pressure oscillation between each nozzle if its installation site is unreasonable, cause certain liquid
The malfunction for pressing control function has seriously affected the safety of power station operation.
Publication No. CN 102042159A, publication date are that on May 04th, 2011 Chinese patent literature discloses one kind
The subsection and closed device that pump-storage generator shutdown rate is adjusted is realized, it is characterized in that by step closure device FD I, step closure device
FD II and sequence closing hydraulic valve integrated package JCK composition；Step closure device FD I includes pilot operated directional control valve V1, solenoid directional control valve V2,
Wherein V1 is 2/2-way pilot operated directional control valve, and V2 is two four-way electromagnetic reversing valves, and V2 is installed on the valve body of pilot operated directional control valve V1
On, for controlling the commutation of pilot operated directional control valve V1；Step closure device FD II include 3-position 4-way pilot operated directional control valve V3, shuttle valve S1 and
Inserted valve C1, C2, C3, wherein inserted valve C1, C2, C3 is integrated in same valve body, and pilot operated directional control valve V3 and shuttle valve S1 are installed on valve
On body, for controlling the switch of inserted valve；Sequence closing hydraulic valve integrated package JCK includes two four-way return of stroke valves V4, V6
With two four-way electromagnetic reversing valves V5, V7, wherein return of stroke valve V4 and solenoid directional control valve V5 be one group, return of stroke valve V6 and
Solenoid directional control valve V7 is another group, for judging the hydraulic turbine/water pump direction inflection point signal；Step closure device FD I and sequence closing
Valve FD II is series at speed-regulating system and begins to speak in pipeline, and sequence closing hydraulic valve integrated package JCK is arranged in guide vane servomotor in foundation pit
Side；Operating oil line road JG and the P of guide vane servomotor close cavity and pilot operated directional control valve the V3 mouth of guide vane servomotor close cavity are connected, guide vane
The operating oil line road JK that servomotor is begun to speak is connected with the A of pilot operated directional control valve V1 mouth, controls pressure oil pipeline P1 and solenoid directional control valve
The P mouth of V2 is connected, and the B mouth of pilot operated directional control valve V1 is connected with A1, A2, A3 of inserted valve C1, C2, C3 mouth, inserted valve C1, C2, C3
B1, B2, B3 mouth and guide vane servomotor pipeline of beginning to speak be connected, control the P mouth phase of pressure oil pipeline P2 and return of stroke valve V4, V6
Even, the A mouth of return of stroke valve V4 is connected with the P of solenoid directional control valve V5 mouth, and the A mouth of return of stroke valve V6 is with solenoid directional control valve V7's
P mouthfuls are connected, and the B mouth of solenoid directional control valve V5 is connected with the end a liquid controling cavity of pilot operated directional control valve V3, the A mouth and liquid of solenoid directional control valve V7
The end the b liquid controling cavity for controlling reversal valve V3 is connected.
Subsection and closed device disclosed in the patent document realizes pump-storage generator hydraulic turbine direction and water pump direction not
With the adjusting of shutdown rate, the safe and reliable operation of pump-storage generator ensure that.
Publication No. CN 101430358, publication date are that on May 13rd, 2009 Chinese patent literatures disclose a kind of pumping
Water storage station head prow time pump operating condition complete set start-up test method successively includes the test of unit pump operating condition, unit generation
Working condition tests, change working test and accidental shutdown test, it is characterized in that: carrying out the unit pump operating condition test, institute first
State unit pump operating condition test the following steps are included:
A, pump operating condition no-load test: start unit with static frequency changer, unit is closed with runner in air in guide vane
In the state of be connected to the grid operation；Measure unit input power, stator and each spot temperature of rotor current, unit and unit vibration
Dynamic and throw value, the dynamic balancing after the verification electronic operating condition of unit is grid-connected；Idle running measures each position temperature until temperature is stablized
Degree and thrust and guide bearing temperature answer hard stop as a discovery watt temperature steeply rises phenomenon in operation, after stable, progress
Autostop test, checks the correctness of shutdown procedure；
B, pump operating condition bailing test: operation unit inflation water pressuring system is exhausted, and monitoring draft tube water level rises feelings
Pressure between condition and guide vane and runner enrolls pressure change oscillogram, determines best opportunity and opening speed that guide vane is opened；
Relation curve is opened by water intake ball valve and guide vane, opens water intake ball valve and guide vane；Admission is transitioned into work of drawing water from zero delivery operating condition
The parameters such as pressure, volute pressure, pressure in draft tube, servomotor stroke between power input to machine, guide vane and runner when condition；In admission
Lower bearing bracket, top cover, support of bearing vibration and main shaft throw；According to above-mentioned admission data and practical lift, rule is opened to guide vane
Etc. being modified and parameter optimization；After pumping operation mode stable operation, measurement power input to machine, guide vane opening, are raised the flow that draws water
Journey, unit vibration and throw, noise, spiral case, pressure in draft tube and pressure fluctuation, each portion's temperature of unit, cooling system flow and
Pressure, shaft voltage etc.；It is comprehensive that the hydraulic turbine/water pump is drawn according to parameters such as the input power of actual measurement, lift, flow and guide vane openings
Curve is closed, and the curve provided with manufactory compares；
C, pump operating condition engine cut off test: unit is run under rated load, provides halt instruction in local control unit, inspection
Look into automatic load-reducing and unit autostop program correctness；Record orderly closedown during main program act timing diagram and
Rotary speed property and overall time determine the tripping opportunity of breaker during load shedding；Under rated load, analog mechanical accident and
Electic protection acts the accidental shutdown of tripping circuit breaker, checks the correctness of pump operating condition load dump test shutdown procedure, checks
Normal and mechanical accident break point brake apparatus investment, the investment and latch status of protective device；Determine in admission stopping process
Pressure between son and electric current, voltage, guide vane opening, spiral case and the pressure in draft tube of rotor, guide vane and runner, turns servomotor stroke
Speed, total down-time and the parameters such as each position vibration of unit and main shaft throw, and according to the oscillogram of above-mentioned parameter, amendment is led
Leaf Closing Law, optimization process parameter.
Hydroenergy storage station head prow disclosed in the patent document time pump operating condition complete set start-up test method, using first machine
Pump operating condition starts scheme for the first time, not only contributes to save engineering cost, moreover it is possible to first operating unit power generation in advance, society and warp
Benefit of helping is good.
But it using above patent document as the prior art of representative, has following defects that
1, it is not able to satisfy the requirement of pump-storage generator multi tate startup-shutdown, emergency shutdown and overspeed protection comprehensively control,
Different degrees of arranging there is each function valve group excessively disperses, and machinery adjustment precision is not high and adjusting is very inconvenient, when long
Between run after will cause setting point drift the phenomenon that, influence power station operational reliability.
2, system pipeline arrangement is complicated, and too long connecting line be easy to cause leakage point mostly too long with the valve group response time,
The problem of system mode switches not in time；Excessive connection nozzle, control oil pipe connector, installation site is required it is high, if installation
Position is unreasonable, easily causes the pressure oscillation between each nozzle, causes the malfunction of hydraulic control function, seriously affects power station
Safety in operation.
Utility model content
The utility model in order to overcome the defects of the prior art described above, provides a kind of guarantor that overruns for hydroenergy storage station
Shield and volume control device, the utility model can satisfy pump-storage generator multi tate startup-shutdown, emergency shutdown and the guarantor that overruns
The requirement for protecting comprehensively control, by the way that accident inserted valve and sequence closing inserted valve and sequence closing pilot solenoid valve is highly integrated
It is integrated, reduces the connection of oil pipe line, avoid the drawback more than leak source, improve unit operational reliability and safety.
The utility model is achieved through the following technical solutions:
A kind of overspeed protection and volume control device for hydroenergy storage station, including control pressure oil circuit, pass through master
Oil circuit connection is in the first inserted valve that main control valve is closed on chamber, the second inserted valve being connected on main control valve unlatching chamber, company
It connects and opens the first sequence closing inserted valve and the second sequence closing inserted valve on chamber in servomotor, it is characterised in that: further include
Oil return box, pilot-operated type electro-hydraulic reversing valve, the first sequence closing pilot solenoid valve for switch the first sequence closing inserted valve, use
The second sequence closing pilot solenoid valve, the first accident for being connected on principal pressure oil sources in switch the second sequence closing inserted valve
Inserted valve and the second accident inserted valve being connected on servomotor unlatching chamber, first inserted valve and the first accident inserted valve point
It is not connected to servomotor to close on chamber, the second accident inserted valve is connect with oil return box, the pilot-operated type electro-hydraulic reversing valve point
It is not connect with the control chamber of the first accident inserted valve, the second accident inserted valve, the first inserted valve and the second inserted valve.
It is parallel on the first sequence closing inserted valve and the second sequence closing inserted valve and is opened for increasing servomotor
The check valve of chamber oil mass.
Flow control valve is also parallel on the first sequence closing inserted valve and the second sequence closing inserted valve；Flow tune
Valve is saved, the first segment for adjusting servomotor closes rate slowly.
The first sequence closing inserted valve is that adjustable segment closes inserted valve, and the second segment for adjusting servomotor is fast
Close rate.
First inserted valve, for being truncated or being connected to main control valve and servomotor；Second inserted valve, for being truncated or even
Logical main control valve and servomotor.
First pressure switch and first pressure are provided on the control chamber oil circuit of first inserted valve and the second inserted valve
Table, first pressure switch, pressure controling signal when for monitoring normal switch machine.
Be provided on the control chamber oil circuit of the first accident inserted valve and the second accident inserted valve second pressure switch and
Second pressure gauge, second pressure switch, for monitoring accidental shutdown pressure signal.
Third pressure switch and third pressure gauge are provided on the control chamber oil circuit of the first sequence closing inserted valve, the
Three pressure switches, for monitoring the opening and closing state of the first sequence closing inserted valve.
The 4th pressure switch and the 4th pressure gauge are provided on the control chamber oil circuit of the second sequence closing inserted valve, the
Four pressure switches, for monitoring the opening and closing state of the second sequence closing inserted valve.
The control pressure oil road is provided with the 5th pressure gauge, and the 5th pressure gauge is for monitoring control pressure oil.
The beneficial effects of the utility model are mainly manifested in following aspect:
One, the utility model is connected to main control valve is closed on chamber first including control pressure oil circuit, by working connection
Inserted valve, the second inserted valve being connected on main control valve unlatching chamber, the first sequence closing being connected on servomotor unlatching chamber
Inserted valve and the second sequence closing inserted valve, pilot-operated type electro-hydraulic reversing valve, are used for the first sequence closing of switch inserted valve at oil return box
The first sequence closing pilot solenoid valve, for switch the second sequence closing inserted valve the second sequence closing pilot solenoid valve,
The first accident inserted valve being connected on principal pressure oil sources and the second accident inserted valve being connected on servomotor unlatching chamber, first
Inserted valve and the first accident inserted valve are connected to servomotor and close on chamber, and the second accident inserted valve is connect with oil return box, first
The control with the first accident inserted valve, the second accident inserted valve, the first inserted valve and the second inserted valve respectively of conduction electro-hydraulic reversing valve
Chamber connection processed, pilot-operated type electro-hydraulic reversing valve, for controlling the first accident inserted valve and the inserting of the second accident when unit emergency shutdown
The closing of the opening of valve and the first inserted valve and the second inserted valve can satisfy pump-storage generator compared with the prior art
The requirement of multi tate startup-shutdown, emergency shutdown and overspeed protection comprehensively control, by inserting accident inserted valve and sequence closing
Valve and sequence closing pilot solenoid valve is highly integrated is integrated, reduces the connection of oil pipe line, avoids the drawback more than leak source, mention
High unit operational reliability and safety.
Two, the utility model, accident inserted valve and sequence closing inserted valve and sequence closing pilot solenoid valve are standard
Part, versatility and interchangeability are high, can satisfy a variety of different emergency cutoff rates on pump-storage generator and booting rate is not
It is same as the requirement of shutdown rate.
Three, it is parallel on the utility model, the first sequence closing inserted valve and the second sequence closing inserted valve for increasing
Servomotor opens the check valve of chamber oil mass, and servomotor is begun to speak the flow of side when increasing booting, meets unit and wants to the available machine time
It asks.
Four, first pressure switch is provided on the control chamber oil circuit of the utility model, the first inserted valve and the second inserted valve
And first pressure gauge；Be provided on the control chamber oil circuit of first accident inserted valve and the second accident inserted valve second pressure switch and
Second pressure gauge；Third pressure switch and third pressure gauge are provided on the control chamber oil circuit of first sequence closing inserted valve；The
The 4th pressure switch and the 4th pressure gauge are provided on the control chamber oil circuit of two-section closing inserted valve；Control pressure oil road is set
It is equipped with the 5th pressure gauge；By the way that multiple pressure switches and pressure gauge is arranged, it can be realized the various movement shapes of remote monitoring valve group
State also facilitates field observation and debugging, guarantees unit safety operation.
Five, the utility model is easily installed using inserting valve arrangement, facilitate system control and inserted valve through-current capability it is big,
Resistance to greasy dirt ability is strong, so that overspeed protection is high, compact-sized with volume control device over all Integration degree.
Six, the utility model, hydraulic, electrical control logic is simple, clear, by hydraulic pressure system under each operating condition of pump-storage generator
System manner of execution is explicitly defined, and monitoring system control flow is simplified, and improves the reliability when switching of unit operating condition.
Seven, the utility model is being abnormal power loss, and coil, which damages, or solenoid valve is stuck waits under extreme cases, such as unit
When in hydraulic turbine condition, it is able to satisfy the rate safety shutdown guide vane that unit closes slowly according to first segment；It is remained under pump operating condition
According to the requirement guide vane closing protected and calculated is adjusted, the safety of unit operation is improved.
Detailed description of the invention
The utility model is described in further detail below in conjunction with specification drawings and specific embodiments,
In:
Fig. 1 is the structural schematic diagram of the utility model；
Marked in the figure: 1, main control valve closing chamber, the 2, first inserted valve, 3, main control valve unlatching chamber, the 4, second inserted valve,
5, servomotor opens chamber, the 6, first sequence closing inserted valve, the 7, second sequence closing inserted valve, 8, oil return box, 9, pilot-operated type electricity
Liquid reversal valve, the 10, first sequence closing pilot solenoid valve, the 11, second sequence closing pilot solenoid valve, 12, principal pressure oil sources,
13, the first accident inserted valve, the 14, second accident inserted valve, 15, servomotor closing chamber, 16, check valve, 17, flow control valve,
18, first pressure switchs, 19, second pressure switch, 20, third pressure switch, the 21, the 4th pressure switch, 22, first pressure
Table, 23, second pressure gauge, 24, third pressure gauge, the 25, the 4th pressure gauge, the 26, the 5th pressure gauge.
Specific embodiment
Embodiment 1
A kind of overspeed protection and volume control device for hydroenergy storage station, including control pressure oil circuit, pass through master
Oil circuit connection is in the first inserted valve 2 that main control valve is closed on chamber 1, the second inserted valve being connected on main control valve unlatching chamber 3
4, the first sequence closing inserted valve 6 and the second sequence closing inserted valve 7 being connected on servomotor unlatching chamber 5, further include oil return
Case 8, pilot-operated type electro-hydraulic reversing valve 9, for the first sequence closing of switch inserted valve 6 the first sequence closing pilot solenoid valve 10,
For the second sequence closing of switch inserted valve 7 the second sequence closing pilot solenoid valve 11, be connected on principal pressure oil sources 12
It first accident inserted valve 13 and is connected to servomotor and opens the second accident inserted valve 14 on chamber 5, first inserted valve 2 and the
One accident inserted valve 13 is connected to servomotor and closes on chamber 15, and the second accident inserted valve 14 is connect with oil return box 8, institute
State pilot-operated type electro-hydraulic reversing valve 9 respectively with the first accident inserted valve 13, the second accident inserted valve 14, the first inserted valve 2 and second
The control chamber of inserted valve 4 connects.
The present embodiment is most basic embodiment, including controls pressure oil circuit, is connected to main control valve by working connection
Close chamber on the first inserted valve, be connected to main control valve open chamber on the second inserted valve, be connected to servomotor open chamber on
The first sequence closing inserted valve and the second sequence closing inserted valve, oil return box, pilot-operated type electro-hydraulic reversing valve, be used for switch first
First sequence closing pilot solenoid valve of sequence closing inserted valve, the second segmentation pass for switch the second sequence closing inserted valve
Pilot solenoid valve is closed, the first accident inserted valve for being connected on principal pressure oil sources and servomotor is connected to and opens the second thing on chamber
Therefore inserted valve, the first inserted valve and the first accident inserted valve be connected to servomotor close chamber on, the second accident inserted valve with
Oil return box connection, pilot-operated type electro-hydraulic reversing valve respectively with the first accident inserted valve, the second accident inserted valve, the first inserted valve and the
The control chambers of two inserted valves connects, pilot-operated type electro-hydraulic reversing valve, for controlled when unit emergency shutdown the first accident inserted valve and
The opening of second accident inserted valve and the closing of the first inserted valve and the second inserted valve can satisfy compared with the prior art
The requirement of pump-storage generator multi tate startup-shutdown, emergency shutdown and overspeed protection comprehensively control, by by accident inserted valve and
Sequence closing inserted valve and sequence closing pilot solenoid valve is highly integrated is integrated, reduces the connection of oil pipe line, avoids leakage
The more drawback of point, improves unit operational reliability and safety.
Embodiment 2
A kind of overspeed protection and volume control device for hydroenergy storage station, including control pressure oil circuit, pass through master
Oil circuit connection is in the first inserted valve 2 that main control valve is closed on chamber 1, the second inserted valve being connected on main control valve unlatching chamber 3
4, the first sequence closing inserted valve 6 and the second sequence closing inserted valve 7 being connected on servomotor unlatching chamber 5, further include oil return
Case 8, pilot-operated type electro-hydraulic reversing valve 9, for the first sequence closing of switch inserted valve 6 the first sequence closing pilot solenoid valve 10,
For the second sequence closing of switch inserted valve 7 the second sequence closing pilot solenoid valve 11, be connected on principal pressure oil sources 12
It first accident inserted valve 13 and is connected to servomotor and opens the second accident inserted valve 14 on chamber 5, first inserted valve 2 and the
One accident inserted valve 13 is connected to servomotor and closes on chamber 15, and the second accident inserted valve 14 is connect with oil return box 8, institute
State pilot-operated type electro-hydraulic reversing valve 9 respectively with the first accident inserted valve 13, the second accident inserted valve 14, the first inserted valve 2 and second
The control chamber of inserted valve 4 connects.
It is parallel on the first sequence closing inserted valve 6 and the second sequence closing inserted valve 7 and is opened for increasing servomotor
Open the check valve 16 of 5 oil mass of chamber.
The present embodiment is a better embodiment, accident inserted valve and sequence closing inserted valve and sequence closing elder generation conductive magnetism
Valve is standard component, and versatility and interchangeability are high, can satisfy on pump-storage generator a variety of different emergency cutoff rates and
The rate that is switched on is different from the requirement of shutdown rate.
It is parallel on first sequence closing inserted valve and the second sequence closing inserted valve and opens chamber oil for increasing servomotor
The check valve of amount, servomotor is begun to speak the flow of side when increasing booting, meets unit to booting time requirement.
Embodiment 3
A kind of overspeed protection and volume control device for hydroenergy storage station, including control pressure oil circuit, pass through master
Oil circuit connection is in the first inserted valve 2 that main control valve is closed on chamber 1, the second inserted valve being connected on main control valve unlatching chamber 3
4, the first sequence closing inserted valve 6 and the second sequence closing inserted valve 7 being connected on servomotor unlatching chamber 5, further include oil return
Case 8, pilot-operated type electro-hydraulic reversing valve 9, for the first sequence closing of switch inserted valve 6 the first sequence closing pilot solenoid valve 10,
For the second sequence closing of switch inserted valve 7 the second sequence closing pilot solenoid valve 11, be connected on principal pressure oil sources 12
It first accident inserted valve 13 and is connected to servomotor and opens the second accident inserted valve 14 on chamber 5, first inserted valve 2 and the
One accident inserted valve 13 is connected to servomotor and closes on chamber 15, and the second accident inserted valve 14 is connect with oil return box 8, institute
State pilot-operated type electro-hydraulic reversing valve 9 respectively with the first accident inserted valve 13, the second accident inserted valve 14, the first inserted valve 2 and second
The control chamber of inserted valve 4 connects.
It is parallel on the first sequence closing inserted valve 6 and the second sequence closing inserted valve 7 and is opened for increasing servomotor
Open the check valve 16 of 5 oil mass of chamber.
Flow control valve 17 is also parallel on the first sequence closing inserted valve 6 and the second sequence closing inserted valve 7；Stream
Adjustable valve 17, the first segment for adjusting servomotor under hydraulic turbine condition close rate slowly.
The first sequence closing inserted valve 6 is that adjustable segment closes inserted valve, is connect under hydraulic turbine condition for adjusting
The second segment quick closing valve rate of power device.
First inserted valve 2, for being truncated or being connected to main control valve and servomotor；Second inserted valve 4, for be truncated or
It is connected to main control valve and servomotor.
The present embodiment is another better embodiment, using inserting valve arrangement, is easily installed, facilitates system control and inserting
Valve through-current capability is big, resistance to greasy dirt ability is strong, so that overspeed protection is high, compact-sized with volume control device over all Integration degree.
Embodiment 4
A kind of overspeed protection and volume control device for hydroenergy storage station, including control pressure oil circuit, pass through master
Oil circuit connection is in the first inserted valve 2 that main control valve is closed on chamber 1, the second inserted valve being connected on main control valve unlatching chamber 3
4, the first sequence closing inserted valve 6 and the second sequence closing inserted valve 7 being connected on servomotor unlatching chamber 5, further include oil return
Case 8, pilot-operated type electro-hydraulic reversing valve 9, for the first sequence closing of switch inserted valve 6 the first sequence closing pilot solenoid valve 10,
For the second sequence closing of switch inserted valve 7 the second sequence closing pilot solenoid valve 11, be connected on principal pressure oil sources 12
It first accident inserted valve 13 and is connected to servomotor and opens the second accident inserted valve 14 on chamber 5, first inserted valve 2 and the
One accident inserted valve 13 is connected to servomotor and closes on chamber 15, and the second accident inserted valve 14 is connect with oil return box 8, institute
State pilot-operated type electro-hydraulic reversing valve 9 respectively with the first accident inserted valve 13, the second accident inserted valve 14, the first inserted valve 2 and second
The control chamber of inserted valve 4 connects.
It is parallel on the first sequence closing inserted valve 6 and the second sequence closing inserted valve 7 and is opened for increasing servomotor
Open the check valve 16 of 5 oil mass of chamber.
Flow control valve 17 is also parallel on the first sequence closing inserted valve 6 and the second sequence closing inserted valve 7；Stream
Adjustable valve 17, the first segment for adjusting servomotor under hydraulic turbine condition close rate slowly.
The first sequence closing inserted valve 6 is that adjustable segment closes inserted valve, is connect under hydraulic turbine condition for adjusting
The second segment quick closing valve rate of power device.
First inserted valve 2, for being truncated or being connected to main control valve and servomotor；Second inserted valve 4, for be truncated or
It is connected to main control valve and servomotor.
First pressure switch 18 and first are provided on the control chamber oil circuit of first inserted valve 2 and the second inserted valve 4
Pressure gauge 22, first pressure switch 18, pressure controling signal when for monitoring normal switch machine.
Second pressure is provided on the control chamber oil circuit of the first accident inserted valve 13 and the second accident inserted valve 14 to open
Close 19 and second pressure gauge 23, second pressure switch 19, for monitoring accidental shutdown pressure signal.
Third pressure switch 20 and third pressure gauge are provided on the control chamber oil circuit of the first sequence closing inserted valve 6
24, third pressure switch 20, for monitoring the opening and closing state of the first sequence closing inserted valve 6.
The 4th pressure switch 21 and the 4th pressure gauge are provided on the control chamber oil circuit of the second sequence closing inserted valve 7
25, the 4th pressure switch 21, for monitoring the opening and closing state of the second sequence closing inserted valve 7.
The control pressure oil road is provided with the 5th pressure gauge 26, and the 5th pressure gauge 26 is for monitoring control pressure oil.
The present embodiment is preferred forms, is provided with first on the control chamber oil circuit of the first inserted valve and the second inserted valve
Pressure switch and first pressure gauge；The second pressure is provided on the control chamber oil circuit of first accident inserted valve and the second accident inserted valve
Power switch and second pressure gauge；Third pressure switch and third pressure are provided on the control chamber oil circuit of first sequence closing inserted valve
Power table；The 4th pressure switch and the 4th pressure gauge are provided on the control chamber oil circuit of second sequence closing inserted valve；Control pressure
The 5th pressure gauge is provided on oil circuit；By the way that multiple pressure switches and pressure gauge is arranged, each of remote monitoring valve group can be realized
Kind action state, also facilitates field observation and debugging, guarantees unit safety operation.
Simply, clearly, hydraulic system manner of execution under each operating condition of pump-storage generator is carried out for hydraulic, electrical control logic
It explicitly defines, simplifies monitoring system control flow, improve the reliability when switching of unit operating condition.
It is being abnormal power loss, coil, which damages, or solenoid valve is stuck waits under extreme cases, as unit is in hydraulic turbine condition
When, it is able to satisfy the rate safety shutdown guide vane that unit closes slowly according to first segment；It remains to protect calculating according to tune under pump operating condition
It is required that guide vane closing, improves the safety of unit operation.
The utility model control pressure oil circuit is connected on control pressure oil-source P1.
The principle of hydraulic turbine condition booting is as follows:
Solenoid valve EV03 in pilot-operated type electro-hydraulic reversing valve is in the end b involution side, the first sequence closing pilot solenoid valve
The end the b hydraulic turbine condition side that the end a of EV01 operates normally side and the second sequence closing pilot solenoid valve EV02 obtains electric, and pressure oil is logical
Check valve S1 and flow control valve M1 are respectively enterd after crossing the second inserted valve CV2, is then parallel to and enters servomotor unlatching together
Chamber JK.Servomotor closes chamber JGOil by the first inserted valve CV1, governor main control valve after return to oil return box.Check valve S1
Setting increase servomotor open chamber JKThe flow of side meets the requirement of this operating condition lower available machine time.Unit is most switched on fastly
The adjusting of time is realized by the main control valve mechanical position limitation of governor or pipeline supernumerary segment flow.
The principle of pump operating condition booting is as follows:
Solenoid valve EV03 in pilot-operated type electro-hydraulic reversing valve is in the end b involution side, the first sequence closing pilot solenoid valve
The end a of EV01 operates normally side and obtains electric, and the end a pump operating condition side of the second sequence closing pilot solenoid valve EV02 obtains electric, pressure oil
By respectively enteing the second sequence closing inserted valve CV6, check valve S1 and flow control valve M1 after the second inserted valve CV2, then
It is parallel to and enters servomotor unlatching chamber J togetherK.Servomotor closes chamber JGOil matched by the master of the first inserted valve CV1, governor
Oil return box is returned to after pressure valve.The adjusting of unit most fast available machine time is still the main control valve mechanical position limitation or pipeline by governor
Supernumerary segment flow is realized.
The principle of emergency cut-off is as follows under hydraulic turbine condition:
Emergency episode occurs in unit, governor cisco unity malfunction can not close servomotor, the revolving speed meeting of unit in time
Runaway speed is quickly risen to, is overrun to limit unit, avoids flying anecdote therefore generation, accident inserted valve and pilot-operated type electricity are set
Liquid reversal valve come close servomotor be protect unit safety important measures.Life group emergency shutdown is issued in hydraulic turbine condition
When situation, the inserting of the first inserted valve CV1 and second after the end a investment side investment of the solenoid valve EV03 in pilot-operated type electro-hydraulic reversing valve
Valve CV2 is closed, and the first accident inserted valve CV3 and the second accident inserted valve CV4 are opened.Pressure oil passes through the first accident inserted valve
CV3 enters servomotor and closes chamber JG.The end a of first sequence closing pilot solenoid valve EV01 operates normally side and the second sequence closing
The end the b hydraulic turbine condition side of pilot solenoid valve EV02 obtains electric, servomotor unlatching chamber JKOil successively by flow control valve M1 and
Oil return box is returned to after second accident inserted valve CV4.First segment servomotor shutdown rate is controlled by adjusting flow control valve M1.
After servomotor reaches inflection point, the end the b segmentation investment side of the first sequence closing pilot solenoid valve EV01 when being closed into second segment
It is electric, the first sequence closing inserted valve CV5 is opened, and piping flow increases at this time, and servomotor shutdown rate is accelerated, by adjusting the
The stroke of one sequence closing inserted valve CV5, controls this section of servomotor shutdown rate.
When governor does not have failure, i.e. the end a investment side of solenoid valve EV03 in pilot-operated type electro-hydraulic reversing valve is not put into,
First inserted valve CV1 and the second inserted valve CV2 is opened, and the first accident inserted valve CV3 and the second accident inserted valve CV4 are closed, pressure
Power oil enters servomotor by the first inserted valve CV1 and closes chamber JG.The a of first sequence closing pilot solenoid valve EV01 rectifies Chang Yun
Row side and the end the b hydraulic turbine condition side of the second sequence closing pilot solenoid valve EV02 obtain electric, servomotor unlatching chamber JKOil successively
Oil return box is returned to after flow control valve M1 and the second inserted valve CV2, governor main valve.By adjust flow control valve M1 come
Control first segment servomotor shutdown rate.After servomotor reaches inflection point, the first sequence closing guide when being closed into second segment
The end the b segmentation investment side of solenoid valve EV01 obtains electric, the first sequence closing inserted valve CV5 opening, at this time piping flow increase, relay
Device shutdown rate is accelerated, and by adjusting the stroke of the first sequence closing inserted valve CV5, controls this section of servomotor shutdown rate.
The principle of emergency cut-off is as follows under pump operating condition:
Solenoid valve in unit generation emergency episode, governor cisco unity malfunction, in pilot-operated type electro-hydraulic reversing valve
The first inserted valve CV1 and the second inserted valve CV2 are closed after the end a investment side investment movement of EV03, the first accident inserted valve CV3 and
Second accident inserted valve CV4 is opened.Pressure oil enters servomotor by the first accident inserted valve CV3 and closes chamber JG.Second segmentation
The end a pump operating condition side for closing pilot solenoid valve EV02 obtains electric, and the second sequence closing inserted valve CV6 is opened at this time, and servomotor opens
Open chamber JKOil simultaneously by after flow control valve M1, the second sequence closing inserted valve CV6 and together by the second accident
Oil return box is returned to after inserted valve CV4.Relay under pump operating condition is controlled by adjusting the stroke of the second sequence closing inserted valve CV6
Device emergency cutoff rate.
When governor does not have failure, i.e. the end a investment side of solenoid valve EV03 in pilot-operated type electro-hydraulic reversing valve is not put into,
First inserted valve CV1 and the second inserted valve CV2 is opened, and the first accident inserted valve CV3 and the second accident inserted valve CV4 are closed, this
When pump operating condition under most the adjusting of shutdown rate is realized still through the second sequence closing inserted valve CV6 is adjusted fastly.
Machinery overrun hydraulic pressure signal hydraulic fluid port K1 working principle it is as follows:
The machinery hydraulic pressure signal hydraulic fluid port K1 that overruns is connect with the solenoid valve EV03 in pilot-operated type electro-hydraulic reversing valve, and machinery is overrun liquid
Signal hydraulic fluid port K1 is pressed to receive to come from mechanic over speed protection device pressure oil signal, as last pipe protection barrier of generator protection,
When unit is overrun, and mechanic over speed protection device acts, mechanic over speed protection device pressure oil blackout, pilot-operated type is electro-hydraulic to be changed
Hydraulic directional valve YD01 into valve realizes commutation under the action of the spring, and the first inserted valve CV1 and the second inserted valve CV2 are closed；
First accident inserted valve CV3 and the second accident inserted valve CV4 is opened；The pressure oil for carrying out primary pressure oil sources P0 passes through the first accident
Inserted valve CV3 enters servomotor and closes chamber, closes servomotor, rapidly to protect unit safety.
Claims (9)
1. a kind of overspeed protection and volume control device for hydroenergy storage station, including control pressure oil circuit, pass through main oil
Road be connected to main control valve close chamber (1) on the first inserted valve (2), be connected to main control valve open chamber (3) on second insert
Dress valve (4), the first sequence closing inserted valve (6) and the second sequence closing inserted valve being connected in servomotor unlatching chamber (5)
(7), it is characterised in that: further include oil return box (8), pilot-operated type electro-hydraulic reversing valve (9), for the first sequence closing of switch inserted valve
(6) the first sequence closing pilot solenoid valve (10), the second sequence closing elder generation for the second sequence closing of switch inserted valve (7)
Conductive magnet valve (11), the first accident inserted valve (13) being connected on principal pressure oil sources (12) and be connected to servomotor open chamber
(5) the second accident inserted valve (14) on, first inserted valve (2) and the first accident inserted valve (13) are connected to relay
Device is closed on chamber (15), and the second accident inserted valve (14) connect with oil return box (8), the pilot-operated type electro-hydraulic reversing valve (9)
Respectively with the control of the first accident inserted valve (13), the second accident inserted valve (14), the first inserted valve (2) and the second inserted valve (4)
Chamber connection processed.
2. a kind of overspeed protection and volume control device for hydroenergy storage station according to claim 1, feature
It is: is parallel on the first sequence closing inserted valve (6) and the second sequence closing inserted valve (7) and is opened for increasing servomotor
Open the check valve (16) of chamber (5) oil mass.
3. a kind of overspeed protection and volume control device for hydroenergy storage station according to claim 1, feature
It is: is also parallel with flow control valve on the first sequence closing inserted valve (6) and the second sequence closing inserted valve (7)
(17)；Flow control valve (17), the first segment for adjusting servomotor close rate slowly.
4. a kind of overspeed protection and volume control device for hydroenergy storage station according to claim 1, feature
Be: the first sequence closing inserted valve (6) is that adjustable segment closes inserted valve, and the second segment for adjusting servomotor is fast
Close rate.
5. a kind of overspeed protection and volume control device for hydroenergy storage station according to claim 1, feature
It is: first inserted valve (2), for being truncated or being connected to main control valve and servomotor；Second inserted valve (4), for being truncated
Or it is connected to main control valve and servomotor.
6. a kind of overspeed protection and volume control device for hydroenergy storage station according to claim 1, feature
It is: is provided with first pressure switch (18) and the on the control chamber oil circuit of first inserted valve (2) and the second inserted valve (4)
One pressure gauge (22), first pressure switch (18), pressure controling signal when for monitoring normal switch machine.
7. a kind of overspeed protection and volume control device for hydroenergy storage station according to claim 1, feature
It is: is provided with second pressure on the control chamber oil circuit of the first accident inserted valve (13) and the second accident inserted valve (14) and opens
(19) and second pressure gauge (23) are closed, second pressure switchs (19), for monitoring accidental shutdown pressure signal.
8. a kind of overspeed protection and volume control device for hydroenergy storage station according to claim 1, feature
It is: is provided with third pressure switch (20) and third pressure on the control chamber oil circuit of the first sequence closing inserted valve (6)
Table (24), third pressure switch (20), for monitoring the opening and closing state of the first sequence closing inserted valve (6).
9. a kind of overspeed protection and volume control device for hydroenergy storage station according to claim 1, feature
It is: is provided with the 4th pressure switch (21) and the 4th pressure on the control chamber oil circuit of the second sequence closing inserted valve (7)
Table (25), the 4th pressure switch (21), for monitoring the opening and closing state of the second sequence closing inserted valve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821602984.0U CN209100190U (en) | 2018-09-29 | 2018-09-29 | A kind of overspeed protection and volume control device for hydroenergy storage station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821602984.0U CN209100190U (en) | 2018-09-29 | 2018-09-29 | A kind of overspeed protection and volume control device for hydroenergy storage station |
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| CN209100190U true CN209100190U (en) | 2019-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821602984.0U Active CN209100190U (en) | 2018-09-29 | 2018-09-29 | A kind of overspeed protection and volume control device for hydroenergy storage station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139350A (en) * | 2018-09-29 | 2019-01-04 | 东方电机控制设备有限公司 | A kind of overspeed protection and volume control device for hydroenergy storage station |
| CN111946543A (en) * | 2020-07-14 | 2020-11-17 | 国家电投集团广西长洲水电开发有限公司 | Bulb type tubular turbine unit safety early warning method and system based on Internet of things |
-
2018
- 2018-09-29 CN CN201821602984.0U patent/CN209100190U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139350A (en) * | 2018-09-29 | 2019-01-04 | 东方电机控制设备有限公司 | A kind of overspeed protection and volume control device for hydroenergy storage station |
| CN109139350B (en) * | 2018-09-29 | 2024-01-26 | 东方电气自动控制工程有限公司 | Overspeed protection and flow control device for pumped storage power station |
| CN111946543A (en) * | 2020-07-14 | 2020-11-17 | 国家电投集团广西长洲水电开发有限公司 | Bulb type tubular turbine unit safety early warning method and system based on Internet of things |
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