CN209444655U - It is a kind of for the hydraulic system with function of redundancy protection - Google Patents
It is a kind of for the hydraulic system with function of redundancy protection Download PDFInfo
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- CN209444655U CN209444655U CN201821602780.7U CN201821602780U CN209444655U CN 209444655 U CN209444655 U CN 209444655U CN 201821602780 U CN201821602780 U CN 201821602780U CN 209444655 U CN209444655 U CN 209444655U
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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 for the hydraulic system with function of redundancy protection; including hydraulic oil source, servo proportion, main control valve and guide vane servomotor; differential pressure type pilot operated directional control valve is provided between servo proportion and main control valve; one control chamber of differential pressure type pilot operated directional control valve is connected with hydraulic oil source, and pressure is constant all the time；Another control chamber is connected by the first solenoid valve, second solenoid valve and control solenoid valve with hydraulic oil source；Wherein the first solenoid valve and the arrival end of second solenoid valve are connected with control solenoid valve simultaneously, and the outlet end of the first solenoid valve is connected with an arrival end of second solenoid valve；The outlet end of second solenoid valve is connected with differential pressure type pilot operated directional control valve；The utility model, which is realized, obtains electric protection and loss protecting to generating set, while also having many advantages, such as that reaction speed is fast, reliability is high, stable.
Description
Technical field
The utility model relates to hydraulic device technical fields, and in particular to a kind of for the hydraulic of function of redundancy protection
System.
Background technique
Power station adjusts the running speed of unit often through hydraulic speed regulation system in the prior art, with current domestic and international water
For the hydraulic speed regulation system of power station, when unit requires to realize power down stopping function, existing system is usually in speed-regulating system
One two single-coil electromagnetic valve is set to realize.But if there is the electromagnetic valve coil to damage suddenly or abnormal power loss situation
Under, due to the spring effect on single-coil electromagnetic valve, solenoid valve commutation, system control oil circuit changes, and leads to speed regulation system
System main control valve piston abnormal motion in turn results in the shutdown of unit abnormal accident；Therefore it is transported safely based on guarantee Hydropower Plant
Capable consideration, it is desirable that the hydraulic control system in power station is with the following functions: it can either realize and " obtain electric in the case where having power supply
It closes "；It can be realized again in the case where power supply disappears " power loss closing ", while also require to work as that there is important control function
Solenoid valve it is stuck or control failure when can close unit in time, to guarantee unit operational safety.
Application No. is the Chinese invention patents of CN201420668762.4 to disclose a kind of hydraulic system loss protecting device,
Including the oil circuit being sequentially connected in series by oil pump, overflow valve and fuel tank, and by the first check valve, the first solenoid directional control valve, storage
The normal work circuit that energy device, hydraulic cylinder, the second solenoid directional control valve, second one-way valve and overflow valve are sequentially connected in series, is also wrapped
It includes the controller of external external power supply, for the ups power to controller uninterrupted power supply and be attempted by the second electromagnetic switch
Proportional pressure control valve on valve, the signal output end of controller is connected with the control signaling interface of proportional pressure control valve, inside controller
Programmable controller PLC is set.The utility model is continual to control by ups power in the unexpected power loss of hydraulic system
Device power supply, according to the relief mode that user selects, control proportional pressure control valve makes hydraulic cylinder automatic or manual pressure release, can be avoided liquid
Pressure system is caused danger movement, and safety is substantially increased.
Utility model content
, fault ratio of hydraulic pressure system height, control poor for security control ability present in existing power station Hydraulic Adjustable Speed technology
The low defect of precision processed, the utility model discloses a kind of for the hydraulic system with function of redundancy protection, the utility model
Realize to system must be electrically turn off and power loss is closed, while machine can be closed in time in the case where important control element failure
Group ensure that normal, steady, the safe operation of equipment.
The utility model is achieved through the following technical solutions above-mentioned purpose:
It is a kind of for the hydraulic system with function of redundancy protection, including hydraulic oil source, servo proportion, main control valve and
Guide vane servomotor, the oil inlet and oil outlet of the main control valve are connected with hydraulic oil source and guide vane servomotor respectively, main with pressure
Upper control chamber and the hydraulic oil source of valve are connected directly, and lower control chamber is connected by servo proportion with hydraulic oil source, and feature exists
In: it further include the first solenoid valve, second solenoid valve and control solenoid valve, the arrival end and hydraulic oil source phase of the control solenoid valve
Even, outlet end is connected with the arrival end of the first solenoid valve and second solenoid valve respectively, the outlet end of first solenoid valve and
The arrival end of second solenoid valve is connected；Differential pressure type pilot operated directional control valve is additionally provided between the servo proportion and main control valve,
The left and right control chamber of the differential pressure type pilot operated directional control valve is connected with hydraulic oil source and second solenoid valve respectively.
Hydraulic oil filter is additionally provided between control solenoid valve and the hydraulic oil source.
First solenoid valve and second solenoid valve are two-position three way magnetic valve, and the control solenoid valve is two-position four-way
Solenoid valve.
The outlet end of the second solenoid valve is provided with pressure switch.
The outlet end of the control solenoid valve, the first solenoid valve and second solenoid valve is provided with pressure measuring tie-in.
It is all provided between the servo proportion and hydraulic oil source, between differential pressure type pilot operated directional control valve control chamber and hydraulic oil source
It is equipped with pressure measuring tie-in.
It is additionally provided with hand/automatic hydraulic reversal valve between the servo proportion and differential pressure type pilot operated directional control valve, the hand/
The control chamber of automatic hydraulic reversal valve is connected by hand/automatic electromagnetic reversal valve with the arrival end of servo proportion.
The hand/automatic hydraulic reversal valve control chamber also passes through manual solenoid directional control valve and flow feedback valve and hydraulic oil
Source is connected, and the outlet end of the flow feedback valve is also connected with hand/automatic hydraulic reversal valve input end.
The hand/automatic electromagnetic reversal valve outlet end is provided with pressure switch.
Compared with prior art the utility model has the following beneficial effects:
1, the utility model is provided with differential pressure type pilot operated directional control valve, differential pressure type liquid between servo proportion and main control valve
One control chamber of control reversal valve is connected with hydraulic oil source, and pressure is constant all the time；Another control chamber by the first solenoid valve,
Second solenoid valve and control solenoid valve are connected with hydraulic oil source；Wherein the first solenoid valve and the arrival end of second solenoid valve simultaneously with
It controls solenoid valve to be connected, the outlet end of the first solenoid valve is connected with an arrival end of second solenoid valve；By control figure it is found that
When control solenoid valve obtains electric, the control oil circuit on the right side of differential pressure type pilot operated directional control valve is connected by the first solenoid valve and control solenoid valve
Logical oil return box, and then the oil return of the oil liquid in the main valve control chamber of realization main control valve upper piston area, main valve piston are quickly downward
Move timely guide vane closing servomotor；And passes through when controlling solenoid valve and breaking down and can not commutate while switching the first solenoid valve
The mode guide vane closing servomotor of control oil circuit oil return is realized with second solenoid valve；When in the first solenoid valve or second solenoid valve
When a power loss of anticipating, oil circuit can guarantee the unimpeded of oil circuit by another normal solenoid valve, when two solenoid valves lose
Differential pressure type pilot operated directional control valve working condition switches when electric, in the control oil circuit being connected on main control valve with servo proportion
Hydraulic oil is passed straight back to oil return box by differential pressure type reversal valve, to realize the quick closedown of guide vane servomotor；This is practical new
Type can guarantee to guarantee that generating set is closed or just in time in the case where solenoid valve obtains electric, power loss and control solenoid valve failure
Often operation, thus realize the loss protecting to generating set, the redundancy of electric protection and important control element when breaking down
Protection, substantially increases the quality of protection to Hydropower Unit, guarantees safety, the continuous service of equipment.
2, the utility model is provided with hydraulic oil filter in hydraulic oil source outlet end, guarantees the hydraulic oil in hydraulic circuit
Quality avoids a large amount of impurity from entering in hydraulic system, to guarantee the lasting of hydraulic system, steady operation, improves system
Stability and safety.
3, the utility model is provided with survey crimping in the outlet end of control solenoid valve, the first solenoid valve and second solenoid valve
Head is provided with pressure measuring tie-in between servo proportion and hydraulic oil source, between differential pressure type pilot operated directional control valve and hydraulic oil source,
Facilitate the pressure state of staff's real-time monitoring system at the scene, so that convenient analyze and determine the failure of system, from
And maintenance and the maintenance efficiency of equipment are improved, guarantee the lasting safe operation of system.
4, the utility model the outlet end of second solenoid valve and the outlet end of manual solenoid directional control valve be provided with pressure after
Electric appliance facilitates the switching state of monitoring pressure signal oil liquid, and monitoring signals is fed back to control system, improves the accurate of control
Property, guarantee the safe operation of equipment.
5, the hand of the utility model/automatic electromagnetic switching valve may be implemented to cut guide vane servomotor hand automatic operating state
It changes；Electromagnetic valve coil excitation is automatic operating state, and loss of excitation is manual operating status；In automatic running, when operation power disappears
When mistake, manual operation can be automatically switched to, prevents unit operation out of control or unnecessary shutdown, extends governor system control function
Energy.
6, the manual operation solenoid valve of the utility model is a 3-position 4-way double electromagnet reversal valve, and the valve is at both ends
When electromagnet loss of excitation, under the effect of left and right end spring, have the function of in runback.Meanwhile by the control oil circuit of hydraulic control one-way valve with
Oil return connection, guarantee system control oil pocket reliably seal.
7, the flow feedback valve of the utility model is the control key element that speed-regulating system runs operation manually, output
Hydraulic pressure signal controls main control valve, and the return to mid-position of main control valve is realized in During manual operation, servomotor is made to be maintained at one
Fixed position realizes the accurate control under manual operation state to actuator positions using hydraulic flow negative-feedback principle,
When automatic running, flow feedback valve is tracer element, tracks the displacement of servomotor, when guaranteeing that hand, automatic mutual mutually switch, can be done
To servomotor position switching undisturbed, guarantee that unit runs smoothly.
Detailed description of the invention
Fig. 1 is that the utility model controls oil circuit figure；
Fig. 2 is that the utility model control solenoid valve must be electrically turn off control oil circuit figure；
Fig. 3 is that the utility model controls solenoid valve runaway condition control oil circuit figure；
Fig. 4 is that the first solenoid valve of the utility model exception power failure state controls oil circuit figure；
Fig. 5 is that the utility model second solenoid valve exception power failure state controls oil circuit figure；
Fig. 6 is two solenoid valves of the utility model power failure state electric operation control circuit figure simultaneously；
Appended drawing reference: 1, hydraulic oil source, 2, servo proportion, 3, main control valve, 4, guide vane servomotor, the 5, first electromagnetism
Valve, 6, second solenoid valve, 7, control solenoid valve, 8, differential pressure type pilot operated directional control valve, 9, hydraulic oil filter, 10, pressure switch,
11, pressure measuring tie-in, 12, hand/automatic hydraulic reversal valve, 13, hand/automatic electromagnetic reversal valve, 14, manual electromagnetic control valve, 15, stream
Measure feedback valve, 16, oil return box.
Specific embodiment
The utility model is specifically described below in conjunction with specific embodiment:
Embodiment 1
Preferred embodiment of the present embodiment as the utility model, it discloses a kind of for function of redundancy protection
Hydraulic system, specific structure as shown in Figure 1, include hydraulic oil source 1, servo proportion 2, main control valve 3 and guide vane servomotor 4,
The main control valve 3 is three position four-way directional control valve, and control piston is additionally provided on main control valve, and the two sides for controlling piston are each
It is provided with a control chamber, the control cavity area of middle and upper part is less than the control cavity area of lower part, and top control chamber passes through hydraulic
Oil strainer 9 is directly connected to hydraulic oil source 1, to form Isobarically Control chamber；Lower part control chamber passes through differential pressure type liquid controlled reversing
Valve is connected with the outlet end of servo proportion；4 hydraulic fluid ports are additionally provided on the main control valve 3, wherein 2 hydraulic fluid ports connect with guide vane
Power device 4 is directly connected to, and a hydraulic fluid port is directly connected with hydraulic oil source 1, another hydraulic fluid port is connected directly with oil return box 16；The liquid
The outlet end of pressure oil filter 9 is also connected with servo proportion 2 and control solenoid valve 7 respectively；The control solenoid valve 7 is two
Four way solenoid valve, the first solenoid valve 5 and second solenoid valve 6 are two-position three way magnetic valve, wherein control solenoid valve 7 P mouth and
Hydraulic oil filter 9 is connected, and T mouthfuls of connection oil return boxes 16, A mouthfuls are truncated, and B mouthfuls electric with the first solenoid valve 5 and second respectively
The B mouth of magnet valve 6 is connected, the A mouth connection oil return box 16 of first solenoid valve 5, the A mouth of P mouthfuls of connection second solenoid valves 6, the
The P mouth of two solenoid valves 6 is connected with the right control chamber of differential pressure type pilot operated directional control valve 8, and the left control chamber of differential pressure type pilot operated directional control valve 8 is straight
It connects and is connected to form Isobarically Control chamber, and left and right two control chamber of differential pressure type pilot operated directional control valve 8 with 9 outlet end of hydraulic oil filter
Structure is similar to two control chambers of main control valve 3, is that the active area of Isobarically Control chamber is smaller.
Embodiment 2
Most preferred embodiment of the present embodiment as the utility model, it discloses a kind of for function of redundancy protection
Hydraulic system, specific structure as shown in Figure 1, include hydraulic oil source 1, servo proportion 2, main control valve 3 and guide vane servomotor 4,
The main control valve 3 is three position four-way directional control valve, and control piston is additionally provided on main control valve, and the two sides for controlling piston are each
It is provided with a control chamber, the control cavity area of middle and upper part is less than the control cavity area of lower part, and top control chamber passes through hydraulic
Oil strainer 9 is directly connected to hydraulic oil source 1, to form Isobarically Control chamber；Lower part control chamber passes through differential pressure type liquid controlled reversing
Valve 8 is connected with the outlet end of servo proportion 2；4 hydraulic fluid ports are additionally provided on the main control valve 3, wherein 2 hydraulic fluid ports and guide vane
Servomotor 4 is directly connected to, and a hydraulic fluid port is directly connected with hydraulic oil source 1, another hydraulic fluid port is connected directly with oil return box 16；It is described
The outlet end of hydraulic oil filter 9 is also connected with servo proportion 2 and control solenoid valve 7 respectively；The servo proportion 2 goes out
Mouth end is connected with hand/automatic hydraulic reversal valve 12 and differential pressure type pilot operated directional control valve 8 in turn, the differential pressure type pilot operated directional control valve 8
Outlet end is connected with a control chamber of main control valve 3；The control solenoid valve 7 is two-position four-way solenoid valve, the first solenoid valve 5
It is two-position three way magnetic valve with second solenoid valve 6, wherein the P mouth of control solenoid valve 7 is connected with hydraulic oil filter 9, T mouthfuls
Oil return box 16 is connected, A mouthfuls are truncated, and B mouthfuls are connected with the B mouth of the first solenoid valve 5 and second solenoid valve 6 respectively, and described first
The A mouth of solenoid valve 5 connects oil return box 16, the A mouth of P mouthfuls of connection second solenoid valves 6, the P mouth and differential pressure type liquid of second solenoid valve 6
The right side control chamber (effective active area is big) for controlling reversal valve 8 is connected, and 8 left side control chamber of differential pressure type pilot operated directional control valve is directly and liquid
9 outlet end of pressure oil filter is connected to form Isobarically Control chamber；The hand/automatic hydraulic reversal valve 12 is two position three way directional control valve,
One input end as previously described is connected with the outlet end of servo proportion 2, and outlet end is connected with differential pressure type pilot operated directional control valve 8；
The hand/automatic hydraulic reversal valve 12 left side control chamber passes through hand/automatic electromagnetic reversal valve 13 and servo proportion 2 entrance
End is connected；The hand/automatic hydraulic reversal valve 12 control chamber also passes through hand, automatic electromagnetic reversal valve 13 and flow feedback valve 15
It is connected with hydraulic oil source 1, and the outlet end of flow feedback valve 15 is also connected with another entrance of hand/automatic hydraulic reversal valve 12；
The outlet end of the control solenoid valve 7, the first solenoid valve 5 and second solenoid valve 6 is provided with pressure measuring tie-in 11.
Between the servo proportion 2 and hydraulic oil source 1, between 8 control chamber of differential pressure type pilot operated directional control valve and hydraulic oil source 1
It is provided with pressure measuring tie-in 11.
The outlet end of the second solenoid valve 6 is provided with pressure switch 10, the outlet of the manual solenoid directional control valve 13
End is provided with pressure switch 10.
The course of work of the utility model: being as shown in Figure 1 the hydraulic control figure under the utility model normal operating conditions,
The oil liquid of hydraulic oil source realizes shunting before controlling solenoid valve, and part of it oil liquid is directly connected to main control valve control upper piston area
Control chamber, the part oil liquid pressure is constant；Another part oil liquid is connected by servo proportion with differential pressure type pilot operated directional control valve
The control chamber for controlling piston lower portion, since the compression area of the control chamber at main control valve control piston both ends differs, main with pressure
Pressure difference is formed between two control chambers of valve, is moved up and down to control main control valve control piston；Part III oil liquid simultaneously
It is respectively connected to left and right control chamber to differential pressure type pilot operated directional control valve, wherein left side control chamber is constant pressure end, right side control chamber is then
It is connected with control solenoid valve, the first solenoid valve and second solenoid valve；It is real by the switching of differential pressure type pilot operated directional control valve working condition
Now to the change of two control chamber of main control valve control oil circuit on off operating mode, the up and down motion of main control valve control piston is pushed, into
And control guide vane servomotor turns off or on state.
The working condition of the utility model is as follows: when the different often-have-electricity of control solenoid valve, control solenoid valve commutation, by Fig. 2
It is found that the control oil circuit on the right side of differential pressure type pilot operated directional control valve controls solenoid valve by the P mouth of second solenoid valve and B mouthfuls of direct connection
B mouth and oil return box, cause to form pressure difference between the control chamber at left and right sides of differential pressure type pilot operated directional control valve, differential pressure type liquid controlled reversing
Valve commutates under the action of the constant pressure oil liquid of left side, will close the oil circuit between servo proportion and main control valve, and by main with pressure
Valve control piston underside control chamber is connected to oil return box, and main control valve is realized under the control of the intracavitary constant pressure oil of Isobarically Control and changed
To control guide vane servomotor according to direction A movement closing.
When control solenoid valve break down it is out of control and can not normal commutation when, it is only necessary to while switching the first solenoid valve and the
The working condition of two solenoid valves, the control chamber on the right side of differential pressure type pilot operated directional control valve passes through second solenoid valve and the first solenoid valve at this time
It is connected to (as shown in Figure 3) with oil return box, causes to form pressure difference, differential pressure between the control chamber at left and right sides of differential pressure type pilot operated directional control valve
Formula pilot operated directional control valve commutates under the action of the constant pressure oil liquid of left side, will close the oil circuit between servo proportion and main control valve,
And be connected to main control valve control piston lower portion control chamber with oil return box, main control valve is intracavitary in control upper piston area Isobarically Control
Constant pressure oil control under realize commutation, thus control guide vane servomotor according to direction A move close.
When the first solenoid valve is in abnormal power failure state, under the action of the spring, solenoid valve commutates (as shown in Figure 4),
Oil circuit between control solenoid valve and the first solenoid valve is truncated, and second solenoid valve works normally, differential pressure type pilot operated directional control valve
Right side control chamber is normally connected to hydraulic oil source, to guarantee that differential pressure type pilot operated directional control valve is in normal operating conditions.
When second solenoid valve is in abnormal power failure state, under the action of the spring, solenoid valve commutates (as shown in Figure 5),
Oil circuit between control solenoid valve and second solenoid valve is truncated, and the first solenoid valve works normally, due to the P of the first solenoid valve
Mouthful be connected to the A of second solenoid valve mouth, thus ensure that in this state differential pressure type pilot operated directional control valve right side control chamber with it is hydraulic
It is normally connected between oil sources, to guarantee that differential pressure type pilot operated directional control valve is in normal operating conditions.
When the first solenoid valve and second solenoid valve power loss simultaneously, as shown in fig. 6, its working condition switches simultaneously,
Oil circuit between control solenoid valve and the first solenoid valve and second solenoid valve is truncated, control on the right side of differential pressure type pilot operated directional control valve
Chamber is connected to by the first solenoid valve and second solenoid valve with oil return box, and the control chamber at left and right sides of differential pressure type pilot operated directional control valve is caused
Between form pressure difference, constant pressure oil liquid of the differential pressure type pilot operated directional control valve in the control chamber of left side under the action of, commutates, and will close servo
Oil circuit between proportioning valve and main control valve, and the control chamber of main control valve control piston lower portion is connected to oil return box, master matches
Pressure valve realizes commutation under the control of the intracavitary constant pressure oil of Isobarically Control, closes to control guide vane servomotor and move according to direction A
It closes.
The utility model can be any in the normal or abnormal damage of control solenoid valve, first or second solenoid valve in summary
It can guarantee the normal operation of hydraulic speed regulation system equipment in the various situations such as one abnormal damage and full factory's power loss or to leading
Leaf servomotor is closed in time, to guarantee the safety of generating set, continuous service.The utility model also has reliability simultaneously
High, adaptable, the advantages that being quick on the draw.
Claims (9)
1. it is a kind of for the hydraulic system with function of redundancy protection, including hydraulic oil source (1), servo proportion (2), master are with pressure
Valve (3) and guide vane servomotor (4), the oil inlet and oil outlet of the main control valve (3) connect with hydraulic oil source (1) and guide vane respectively
Power device (4) is connected, and upper control chamber and the hydraulic oil source (1) of main control valve (3) are connected directly, and lower control chamber passes through servo proportion
(2) it is connected with hydraulic oil source (1), it is characterised in that: further include the first solenoid valve (5), second solenoid valve (6) and control solenoid valve
(7), it is described control solenoid valve (7) arrival end be connected with hydraulic oil source (1), outlet end respectively with the first solenoid valve (5) and
The arrival end of second solenoid valve (6) is connected, the outlet end of first solenoid valve (5) and the arrival end phase of second solenoid valve (6)
Even；It is additionally provided with differential pressure type pilot operated directional control valve (8) between the servo proportion (2) and main control valve (3), the differential pressure type liquid
The left and right control chamber of control reversal valve (8) is connected with hydraulic oil source (1) and second solenoid valve (6) respectively.
2. according to claim 1 a kind of for the hydraulic system with function of redundancy protection, it is characterised in that: the control
Hydraulic oil filter (9) are additionally provided between solenoid valve (7) processed and hydraulic oil source (1).
3. according to claim 1 a kind of for the hydraulic system with function of redundancy protection, it is characterised in that: described
One solenoid valve (5) and second solenoid valve (6) are two-position three way magnetic valve, and the control solenoid valve (7) is two-position four-way electromagnetism
Valve.
4. according to claim 1 a kind of for the hydraulic system with function of redundancy protection, it is characterised in that: described
The outlet end of two solenoid valves (6) is provided with pressure switch (10).
5. according to claim 1 a kind of for the hydraulic system with function of redundancy protection, it is characterised in that: the control
The outlet end of solenoid valve (7) processed, the first solenoid valve (5) and second solenoid valve (6) is provided with pressure measuring tie-in (11).
6. according to claim 1 a kind of for the hydraulic system with function of redundancy protection, it is characterised in that: described to watch
It takes between proportioning valve (2) and hydraulic oil source (1), be respectively provided between differential pressure type pilot operated directional control valve (8) control chamber and hydraulic oil source (1)
There are pressure measuring tie-in (11).
7. according to claim 1 a kind of for the hydraulic system with function of redundancy protection, it is characterised in that: described to watch
It takes and is additionally provided with hand/automatic hydraulic reversal valve (12) between proportioning valve (2) and differential pressure type pilot operated directional control valve (8), the hand/automatic
The control chamber of pilot operated directional control valve (12) is connected by hand/automatic electromagnetic reversal valve (13) with the arrival end of servo proportion (2).
8. according to claim 7 a kind of for the hydraulic system with function of redundancy protection, it is characterised in that: described
Hand/automatic hydraulic reversal valve (12) control chamber also passes through manual solenoid directional control valve (14) and flow feedback valve (15) and hydraulic oil
Source (1) is connected, and the outlet end of the flow feedback valve (15) is also connected with hand/automatic hydraulic reversal valve (12) input end.
9. according to claim 7 a kind of for the hydraulic system with function of redundancy protection, it is characterised in that: described
Hand/automatic electromagnetic reversal valve (13) outlet end is provided with pressure switch (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821602780.7U CN209444655U (en) | 2018-09-29 | 2018-09-29 | It is a kind of for the hydraulic system with function of redundancy protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821602780.7U CN209444655U (en) | 2018-09-29 | 2018-09-29 | It is a kind of for the hydraulic system with function of redundancy protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209444655U true CN209444655U (en) | 2019-09-27 |
Family
ID=68009356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821602780.7U Active CN209444655U (en) | 2018-09-29 | 2018-09-29 | It is a kind of for the hydraulic system with function of redundancy protection |
Country Status (1)
| Country | Link |
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| CN (1) | CN209444655U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236803A (en) * | 2018-09-29 | 2019-01-18 | 东方电机控制设备有限公司 | It is a kind of for the hydraulic system with function of redundancy protection |
| CN110873096A (en) * | 2019-12-05 | 2020-03-10 | 河南永华能源有限公司 | Main well hydraulic station redundant loop transformation system |
| CN111350627A (en) * | 2020-04-01 | 2020-06-30 | 东方电气自动控制工程有限公司 | Hydraulic speed regulation control system with automatic hand switching function |
-
2018
- 2018-09-29 CN CN201821602780.7U patent/CN209444655U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236803A (en) * | 2018-09-29 | 2019-01-18 | 东方电机控制设备有限公司 | It is a kind of for the hydraulic system with function of redundancy protection |
| CN109236803B (en) * | 2018-09-29 | 2023-12-15 | 东方电气自动控制工程有限公司 | Hydraulic system with redundancy protection function |
| CN110873096A (en) * | 2019-12-05 | 2020-03-10 | 河南永华能源有限公司 | Main well hydraulic station redundant loop transformation system |
| CN110873096B (en) * | 2019-12-05 | 2022-02-11 | 河南永华能源有限公司 | Main well hydraulic station redundant loop transformation system |
| CN111350627A (en) * | 2020-04-01 | 2020-06-30 | 东方电气自动控制工程有限公司 | Hydraulic speed regulation control system with automatic hand switching function |
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