CN208518993U - A kind of control device of the main control valve of single-ended control - Google Patents
A kind of control device of the main control valve of single-ended control Download PDFInfo
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- CN208518993U CN208518993U CN201821106818.1U CN201821106818U CN208518993U CN 208518993 U CN208518993 U CN 208518993U CN 201821106818 U CN201821106818 U CN 201821106818U CN 208518993 U CN208518993 U CN 208518993U
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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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Abstract
The utility model discloses a kind of control devices of the main control valve of single-ended control; including valve in main control valve, servo proportion, auxiliary pilot operated valve device, runback; urgent pilot valve increases valve manually, reduces valve, selector valve, emergency stop valve and fixed middle oil cylinder manually; by improving connection relationship; main control valve is set to may be implemented purely mechanic to manually control function in the case where system power loss or electric loop failure; and the feature that the present apparatus has level of integrated system high, compact-sized.
Description
Technical field
The utility model relates to a kind of control devices of the main control valve of single-ended control, belong to control system technical field.
Background technique
Core equipment one of of the main control valve as speed-regulating system plays unit reliability service of the unit under different operating conditions
Vital effect.When power grid or power station break down, power supply disappears, and is minimized to lose, power plant is often
It needs to carry out black starting-up operation, i.e. manual operation main control valve is opened, and is behaved unit as early as possible, is restored electricity.And it is current
Using the speed-regulating system of single-ended control main control valve, including electric hand moves opened loop control and electric hand moves closed loop control mode, with electricity
Source disappears (including common alternating current and direct current), and traditional electro-manual operation will lose meaning.
The main control valve spool both ends food tray area of single-ended control is different, and the constant pressure end of usually logical pressure oil is small, control
End is big.By three control oil pockets, to realize the control to main control valve, respectively main control valve FC constant pressure chamber C0, control chamber
C1, the control chamber K1 for determining middle cylinder DZ.When determining middle cylinder control chamber K1 and leading to oil return, main control valve FC control chamber C1 lead to pressure oil, leads and matches
Toward evolution to movement, servomotor is opened；When control chamber C1 leads to oil return, main with toward direction movement is closed, servomotor is closed；System power loss
When, determine middle cylinder control chamber K1 and lead to pressure oil, main control valve FC control chamber C1 leads to oil return, and main control valve is in middle position, and servomotor is protected
Position before holding system power loss is motionless.
It is existing that purely mechanic to manually control principle as shown in Figure 1.By in servo proportion SV, manual auxiliary valve EV1, runback
Valve EV2, urgent pilot valve EV3, increase manually valve MV1, reduce manually valve MV2, selector valve MV3, emergency stop valve HV1, it is fixed in
Cylinder DZ, main control valve FC and servomotor J composition.System do not power on or system power loss in the case where, servo proportion SV is in
Median function is protected, the A mouth of SV is connected to oil return with B mouthfuls, and the control chamber C1 of main control valve FC leads to oil return at this time.Valve in runback
EV2 commutation, the control chamber K1 for determining middle cylinder DZ is pressure oil, keeps main control valve FC in an intermediate position.Operation increases valve manually
The control chamber C1 of MV1, main control valve FC lead to pressure oil, and main control valve FC toward evolution to movement, open by servomotor；Operation subtracts manually
Few valve MV2, the control chamber K1 for determining middle cylinder DZ is oil return, and main with toward direction movement is closed, servomotor is closed.It realizes purely mechanic manual
The function of increase and decrease.
The common manual control mode of the main control valve of single-ended control manually controls for electricity.When control power supply disappear and
The failure that servomotor displacement sensor feedback failure etc. can cause electricity to manually control even will cause unit and overrun mistake when serious
Control etc. causes unpredictable consequence.Traditional purely mechanic manual control mode when system operates normally it is artificial touch it is in one's hands
Dynamic regulating valve will cause remarkable action.Such as Fig. 1, when servo proportion SV is in right position (intersecting position), at this time main control valve control
Chamber C1 processed leads to oil return, and main control valve is toward direction movement is closed, if increasing valve MV1 movement, main control valve control chamber C1 manually at this time
Logical pressure oil, main control valve cause remarkable action toward evolution to movement.It is traditional purely mechanic to manually control investment condition: from
Valve EV2 power loss while manual auxiliary valve EV1 are obtained electric in multiple, and valve MV1 can be increased by manually at this time and reduce valve MV2 manually and realize
Main control valve switch still has manual auxiliary valve EV1 to obtain electric, is not that so-called meaning is " purely mechanic at this time when normal purely manual control
Manually ".System operation is impacted in order to avoid increasing valve MV1 manually, reducing the malfunction such as valve MV2 manually, and is guaranteed
Purely mechanic manual control mode under electric or power loss operating condition is obtained, above-mentioned control principle is improved.
Summary of the invention
Technical problem to be solved by the utility model is to provide a kind of pair of main control valves to return in system power loss or electrically
The purely mechanic device manually controlled is carried out to main control valve in the case where the failure of road and there is level of integrated system height, it is compact-sized
Control device.
In order to solve the above technical problems, the technical solution adopted by the utility model is:
A kind of control device of the main control valve of single-ended control, including main control valve, servo proportion, auxiliary pilot operated valve device,
Valve in runback, urgent pilot valve increase valve manually, reduce valve, selector valve, emergency stop valve and fixed middle oil cylinder, pressure manually
Oil sources respectively with main control valve constant pressure chamber C0, manually increase valve oil inlet P, selector valve oil inlet P, servo proportion oil inlet P
And urgent pilot valve oil inlet P connection, increase valve actuator port manually and is connect with auxiliary pilot operated valve device oil outlet T, selector valve work
Make hydraulic fluid port to connect with valve in runback, in runback valve actuator port respectively with auxiliary pilot operated valve device liquid controling cavity and manually reduce valve into
Hydraulic fluid port P connection reduces valve actuator port manually and successively connect with emergency stop valve oil inlet P 2 and fixed middle oil cylinder control chamber K1,
Servo proportion actuator port is successively controlled with auxiliary pilot operated valve device oil inlet P, emergency stop valve oil inlet P 1 and main control valve
Chamber C1 connection, urgent pilot valve actuator port are connect with emergency stop valve liquid controling cavity X, main control valve oil outlet T, servo proportion
Valve oil outlet T in oil outlet T, runback, urgent pilot valve oil outlet T, increase valve oil outlet T manually, reduce valve oil outlet manually
T, selector valve oil outlet T and emergency stop valve oil outlet T1, T2 are connect with oil return box respectively.
When system obtains electric automatic control, valve is obtained electric in runback, and the control chamber K1 of fixed middle oil cylinder leads to oil return, main control valve control
Chamber C1 leads to pressure oil, can automatically control master by the size of servo ratio valve regulation main control valve control chamber pressure oil pressure
Distributing valve movement.
System obtains electric purely mechanic when manually controlling, and valve power loss commutation in runback, auxiliary pilot operated valve device commutation assists pilot operated valve device work
Make hydraulic fluid port to connect with oil outlet T, automatic loop is ended, and the control chamber K1 of fixed middle oil cylinder leads to pressure oil, while main control valve control
Chamber C1 processed leads to oil return, operates and increases valve manually, and the control chamber C1 of main control valve leads to pressure oil, and main control valve is toward evolution to movement；
Operation reduces valve manually, and the control chamber K1 for determining middle oil cylinder is oil return, and main control valve is acted toward direction is closed.
When automatic emergency is shut down, emergency stop guide's valve coil obtains electric, and emergency stop valve liquid controling cavity X is made lead to pressure oil, at this time calmly
The control chamber K1 of middle oil cylinder and the control chamber C1 of main control valve lead to oil return, make at this time in the pressure oil of the constant pressure chamber C0 of main control valve
Under, emergency shutdown is realized.
When system is powered down emergency shutdown, switching selector valve commutates, and the actuator port of selector valve is connected with oil return inlet T,
The control chamber K1 of oil cylinder leads to oil return in fixed, and the control chamber C1 of main control valve leads to oil return, at this time the constant pressure chamber C0's of main control valve
Under pressure oil effect, emergency shutdown is realized.
Purely mechanic when manually controlling under system power loss, servo proportion is in protection median function, the work of servo proportion
Hydraulic fluid port A, B are connected to oil return inlet T, and the control chamber C1 of main control valve leads to oil return at this time, valve commutation in runback, the control of fixed middle oil cylinder
Chamber K1 processed leads to pressure oil, keeps main control valve in an intermediate position, operates and increases valve manually, and the control chamber C1 of main control valve leads to pressure
Oil, main control valve is toward evolution to movement；Operation is manual to reduce valve, and the control chamber K1 of fixed middle oil cylinder is oil return, and main control valve is past to close
Direction movement.
The utility model it is achieved the utility model has the advantages that
1, the present apparatus is simple and compact for structure, and level of integrated system is high, and truly purely mechanic purely manual can be achieved at the same time
Operate (electric or power loss in the case of can reach purely mechanic manually control), automatically control, emergency shutdown (shut down by automatic emergency
With power down emergency shutdown) function in power down runback.
2, since purely mechanic purely manual operation can be achieved, easy access maintenance debugging is easy to operate.
3, maloperation hand-operated valve bring risk when avoiding normal operation.
Detailed description of the invention
Fig. 1 is prior art schematic diagram；
Fig. 2 is the utility model principle figure；
Description of drawing identification: 1 main control valve, 2 fixed middle oil cylinders, 3 emergency stop valves, 4 urgent pilot valves, 5 auxiliary pilot operated valve devices,
6 servo proportions, 7 increase valves manually, and 8 reduce valves, 9 selector valves, valve in 10 runbacks manually.
Specific embodiment
The utility model is further described with reference to the accompanying drawing.Following embodiment is only used for clearly illustrating this
The technical solution of utility model, and cannot be used as a limitation the limitation protection scope of the utility model.
As shown in Fig. 2, a kind of control device of the main control valve 1 of single-ended control, including main control valve 1, servo proportion
6, pilot operated valve device 5, valve 10 in runback are assisted, urgent pilot valve 4 increases valve 7 manually, reduces valve 8, selector valve 9, emergency shutdown manually
Valve 3 and it is fixed in oil cylinder 2, pressure oil-source increase respectively with 1 constant pressure chamber C0 of main control valve, manually 7 oil inlet P of valve, selector valve 9 into
Hydraulic fluid port P, 6 oil inlet P of servo proportion and the connection of 4 oil inlet P of urgent pilot valve, increase by 7 actuator port B of valve and auxiliary manually
5 oil outlet T connection of pilot operated valve device, 9 actuator port A of selector valve are connect with 10 oil inlet P of valve in runback, 10 working oil of valve in runback
Mouthful A reduces 8 oil inlet P of valve with auxiliary 5 liquid controling cavity of pilot operated valve device and manually respectively and connect, reduce manually 8 actuator port A of valve with tightly
Anxious 3 oil inlet P 2 of shutdown valve connection, 3 actuator port B of emergency stop valve are connect with fixed middle 2 control chamber K1 of oil cylinder, servo proportion 6
Actuator port A is connect with auxiliary 5 oil inlet P of pilot operated valve device, and auxiliary 5 actuator port A of pilot operated valve device and 3 oil inlet P 1 of emergency stop valve connect
It connects, 3 actuator port A of emergency stop valve is connect with 1 control chamber C1 of main control valve, urgent 4 actuator port A of pilot valve and emergency shutdown
3 liquid controling cavity X connection of valve, 1 oil outlet T of main control valve, 6 oil outlet T of servo proportion, 10 oil outlet T of valve in runback, urgent guide
4 oil outlet T of valve, increase by 7 oil outlet T of valve manually, reduce 8 oil outlet T of valve, 9 oil outlet T of selector valve and emergency stop valve manually
3 oil outlet T1, T2 are connect with oil return box respectively.
When system obtains electric automatic control, valve 10 is obtained electric in runback, and the control chamber K1 of fixed middle oil cylinder 2 leads to oil return, main control valve 1
Control chamber C1 leads to pressure oil, can be automatic by the size that servo proportion 6 adjusts 1 control chamber pressure oil pressure of main control valve
Main control valve 1 is controlled to act.
System obtain it is electric it is purely mechanic 10 power loss of valve commutation in runback, A mouthful are connected to P mouthfuls when manually controlling, auxiliary pilot operated valve device 5
Commutation, auxiliary 5 actuator port A of pilot operated valve device are connect with oil outlet T, and automatic loop is ended at this time, the control chamber K1 of fixed middle oil cylinder 2
Logical pressure oil, while 1 control chamber C1 of main control valve leads to oil return, operates and increases valve 7 manually, the logical pressure of the control chamber C1 of main control valve 1
Power oil, main control valve 1 is toward evolution to movement；Operation reduces valve 8 manually, and the control chamber K1 of fixed middle oil cylinder 2 is oil return, main control valve
1 acts toward direction is closed.Realize the function that electric manual switch control increases and decreases manually.
When automatic emergency is shut down, emergency stop guide's valve coil obtains electric, and 3 liquid controling cavity X of emergency stop valve is made lead to pressure oil, at this time calmly
The control chamber K1 of middle oil cylinder 2 and the control chamber C1 of main control valve 1 lead to oil return, at this time in the pressure of the constant pressure chamber C0 of main control valve 1
Under oil effect, emergency shutdown is realized.
When system is powered down emergency shutdown, switching selector valve 9 commutates, the actuator port A and oil return inlet T phase of selector valve 9
Even, the control chamber K1 of fixed middle oil cylinder 2 leads to oil return, and the control chamber C1 of main control valve 1 leads to oil return, at this time in the constant pressure of main control valve 1
Under the pressure oil effect of chamber C0, emergency shutdown is realized.
Purely mechanic when manually controlling under system power loss, servo proportion 6 is in protection median function, the work of servo proportion 6
Making hydraulic fluid port A, B to be connected to oil return inlet T, the control chamber C1 of main control valve 1 leads to oil return at this time, 10 power loss of valve commutation in runback, and A mouthfuls
It is connected to P mouthfuls, the control chamber K1 of fixed middle oil cylinder 2 leads to pressure oil, keeps main control valve 1 in an intermediate position, operates and increase valve manually
7, the control chamber C1 of main control valve 1 lead to pressure oil, and main control valve 1 is toward evolution to movement；Operation reduces valve 8, fixed middle oil cylinder 2 manually
Control chamber K1 be oil return, main control valve 1 toward close direction movement.When system is in automatic running mode, operation is manual at this time
Increase by 7 pressure of valve to be ended by auxiliary pilot operated valve device 5, avoids the malfunction of main control valve 1.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvement and deformations can also be made, these change
It also should be regarded as the protection scope of the utility model into deformation.
Claims (6)
1. a kind of control device of the main control valve of single-ended control, characterized in that including main control valve, servo proportion, auxiliary
Valve in pilot operated valve device, runback, urgent pilot valve increase valve manually, reduce valve, selector valve, emergency stop valve and fixed middle oil manually
Cylinder, pressure oil-source respectively with main control valve constant pressure chamber C0, manually increase valve oil inlet P, selector valve oil inlet P, servo proportion
Oil inlet P and the connection of urgent pilot valve oil inlet P increase valve actuator port manually and connect with auxiliary pilot operated valve device oil outlet T, select
It selects valve actuator port to connect with valve in runback, valve actuator port subtracts with auxiliary pilot operated valve device liquid controling cavity and manually respectively in runback
Few valve oil inlet P connection, reduce manually valve actuator port successively with emergency stop valve oil inlet P 2 and it is fixed in oil cylinder control chamber
K1 connection, servo proportion actuator port is successively with auxiliary pilot operated valve device oil inlet P, emergency stop valve oil inlet P 1 and master with pressure
The C1 connection of valve control chamber, urgent pilot valve actuator port are connect with emergency stop valve liquid controling cavity X, main control valve oil outlet T, servo
Valve oil outlet T in proportioning valve oil outlet T, runback, urgent pilot valve oil outlet T, increase valve oil outlet T manually, reduce valve manually
Oil outlet T, selector valve oil outlet T and emergency stop valve oil outlet T1, T2 are connect with oil return box respectively.
2. a kind of control device of the main control valve of single-ended control according to claim 1, characterized in that system obtain it is electric from
When dynamic control, valve is obtained electric in runback, and the control chamber K1 of fixed middle oil cylinder leads to oil return, and main control valve control chamber C1 leads to pressure oil, passes through
The size of servo ratio valve regulation main control valve control chamber pressure oil pressure can automatically control main control valve movement.
3. a kind of control device of the main control valve of single-ended control according to claim 1, characterized in that system obtains electric pure
When mechanical, hand-driven controls, valve power loss commutation in runback, auxiliary pilot operated valve device commutation, auxiliary pilot operated valve device actuator port and oil outlet T connect
It connects, automatic loop is ended, and the control chamber K1 of fixed middle oil cylinder leads to pressure oil, while main control valve control chamber C1 leads to oil return, operation
Increase valve manually, the control chamber C1 of main control valve leads to pressure oil, and main control valve is toward evolution to movement；Operation reduces valve manually, fixed
The control chamber K1 of middle oil cylinder is oil return, and main control valve is acted toward direction is closed.
4. a kind of control device of the main control valve of single-ended control according to claim 1, characterized in that automatic emergency stops
When machine, emergency stop guide's valve coil obtains electric, and emergency stop valve liquid controling cavity X is made to lead to pressure oil, it is fixed at this time in oil cylinder control chamber K1 and
The control chamber C1 of main control valve leads to oil return, at this time under the pressure oil effect of the constant pressure chamber C0 of main control valve, realizes emergency shutdown.
5. a kind of control device of the main control valve of single-ended control according to claim 1, characterized in that it is tight that system is powered down
When emergency stop machine, switching selector valve commutates, and the actuator port of selector valve is connected with oil return inlet T, the control chamber K1 of fixed middle oil cylinder
The control chamber C1 of logical oil return, main control valve leads to oil return, at this time under the pressure oil effect of the constant pressure chamber C0 of main control valve, realizes tight
Emergency stop machine.
6. a kind of control device of the main control valve of single-ended control according to claim 1, characterized in that under system power loss
Purely mechanic when manually controlling, servo proportion is in protection median function, and actuator port A, B of servo proportion are and oil return inlet T
Connection, the control chamber C1 of main control valve leads to oil return at this time, valve commutation in runback, and the control chamber K1 of fixed middle oil cylinder leads to pressure oil, makes
Main control valve is in an intermediate position, operates and increases valve manually, and the control chamber C1 of main control valve leads to pressure oil, and main control valve is toward evolution
To movement；Operation reduces valve manually, and the control chamber K1 for determining middle oil cylinder is oil return, and main control valve is acted toward direction is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821106818.1U CN208518993U (en) | 2018-07-13 | 2018-07-13 | A kind of control device of the main control valve of single-ended control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821106818.1U CN208518993U (en) | 2018-07-13 | 2018-07-13 | A kind of control device of the main control valve of single-ended control |
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| Publication Number | Publication Date |
|---|---|
| CN208518993U true CN208518993U (en) | 2019-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821106818.1U Active CN208518993U (en) | 2018-07-13 | 2018-07-13 | A kind of control device of the main control valve of single-ended control |
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| CN (1) | CN208518993U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043096A (en) * | 2020-01-06 | 2020-04-21 | 华自科技股份有限公司 | Water turbine speed regulating system and built-in self-resetting double-end regulating main pressure distributing valve set thereof |
| CN114738352A (en) * | 2022-04-29 | 2022-07-12 | 河海大学 | Hydraulic structure of speed regulator of small hydroelectric generating set, speed regulator and control method of speed regulator |
-
2018
- 2018-07-13 CN CN201821106818.1U patent/CN208518993U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043096A (en) * | 2020-01-06 | 2020-04-21 | 华自科技股份有限公司 | Water turbine speed regulating system and built-in self-resetting double-end regulating main pressure distributing valve set thereof |
| CN114738352A (en) * | 2022-04-29 | 2022-07-12 | 河海大学 | Hydraulic structure of speed regulator of small hydroelectric generating set, speed regulator and control method of speed regulator |
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