CN205298092U - Automatically controlled hydraulic actuator of emergent shutoff type - Google Patents
Automatically controlled hydraulic actuator of emergent shutoff type Download PDFInfo
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- CN205298092U CN205298092U CN201620066941.XU CN201620066941U CN205298092U CN 205298092 U CN205298092 U CN 205298092U CN 201620066941 U CN201620066941 U CN 201620066941U CN 205298092 U CN205298092 U CN 205298092U
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- valve
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- solenoid operated
- operated directional
- oil cylinder
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Abstract
The utility model provides an automatically controlled hydraulic actuator of emergent shutoff type, including motor, hydraulic pump, cartridge formula control valve, hydro -cylinder, energy storage ware, hydraulic tank, manual pump, pressure sensor. The energy storage ware plays the effect of emergent energy source, does not need motor work, and the speed of closing is faster, have redundant function, when power and normal control model lose, can accept the ESD active signal of bypass under the emergent shutoff mode, carry out the emergent function of turn -offing, have interlocking protect function, under conventional mode or the emergent shutoff mode, send the emergent signal that turn -offs of ESD as higher level control system, will have priority and carry out other switching signal of this signal parallel machine tool shielding, avoid the signal conflict to lead to the fact that the action is disorderly lost efficacy, have intelligence control system, detectable real -time signal judges system operating state and implements the adjustment, integrated manual emergent function, no power supply or do not have energy storage ware energy storage state under, can realize that manually operation opens, closes the valve.
Description
Technical field
The utility model relates to gate valve, airdoor control field, particularly relates to a kind of emergent turn-off type electric controlled hydraulic actuator.
Background technology
Gate valve, due to advantages such as its structure is simple, good airproof performances, is widely used in the industries such as mine, petrochemical industry, electric power, water supply. What on market, gate valve topworks was more common is hand wheel switch, and what more advanced and level of automation was high has the schemes such as electronic performer, is increased by motor rotary motion and step-down gear and turns round, substitutes handwheel, it is possible to less labour intensity, is easy to realize Long-distance Control. But also there are some problems: mainly band load difficulty in starting, overload protection not easily realizes, and often causes structural impact to damage, and the emergency shutdown in emergency circumstances that has a power failure (or unlatching) function is difficult to realize.
Summary of the invention
The utility model to be solved above technical problem, it is provided that a kind of emergent turn-off type electric controlled hydraulic actuator being applied to gate valve/air door.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of emergent turn-off type electric controlled hydraulic actuator, comprises motor, hydro-pump, plug-in control valve, oil cylinder, energy storage, hydraulic reservoir, manual pump, pressure transmitter,
Described control valve comprises surplus valve, check valve, the first solenoid operated directional valve, the 2nd solenoid operated directional valve, the 3rd solenoid operated directional valve, liquid controlled reversing valve, the first hand stop valve, the 2nd hand stop valve, the 3rd hand stop valve, the 4th hand stop valve, the 5th hand stop valve, adjustable throttling, bidirectional hydraulic lock, the A mouth of described oil cylinder is connected with described oil cylinder by described bidirectional hydraulic lock with B mouth
Described hydro-pump is driven by described motor, the oil suction of described hydro-pump is connected with described hydraulic reservoir, the oil outlet of described hydro-pump is connected with the entrance of described check valve, the outlet of described check valve is divided into ten road pipelines, one road pipeline connects the oil suction of described surplus valve, the oil return mouth of described surplus valve connects described hydraulic reservoir, two road pipelines connect described manual pump, the oil suction of described manual pump connects described hydraulic reservoir, three-way plece line connects described throttling valve and described energy storage successively, four road pipelines connect described first hand stop valve and described hydraulic reservoir successively, five road pipelines connect described pressure transmitter, six road pipelines and seven road pipelines connect described 2nd hand stop valve entrance and described 3rd manual shutoff valve inlet respectively, described 2nd hand stop valve outlet connects with the B mouth of described oil cylinder, the A mouth of described 3rd manual shutoff valve outlet port and described oil cylinder connects, eight road pipelines connect the Z3 mouth of described 3rd solenoid operated directional valve, nine road pipelines connect the Z1 mouth of described first solenoid operated directional valve, ten road pipelines connect the Z2 mouth of described 2nd solenoid operated directional valve, the Y3 mouth of described 3rd solenoid operated directional valve is connected with the A mouth of described oil cylinder and the X4 mouth of described liquid controlled reversing valve respectively, the X3 mouth of described 3rd solenoid operated directional valve is connected with the Y1 mouth of described first solenoid operated directional valve, the X1 mouth of described first solenoid operated directional valve connects described hydraulic reservoir by described 4th hand stop valve, the Y4 mouth of described liquid controlled reversing valve is connected with the Y2 mouth of described 2nd solenoid operated directional valve, the Z4 mouth of described liquid controlled reversing valve connects the B mouth of described oil cylinder, the Q4 mouth of described liquid controlled reversing valve connects described hydraulic reservoir, the X2 mouth of described 2nd solenoid operated directional valve is connected with described hydraulic reservoir by described 5th hand stop valve.
Described first solenoid operated directional valve, described 2nd solenoid operated directional valve and described 3rd solenoid operated directional valve are two-bit triplet solenoid operated directional valve.
Described liquid controlled reversing valve is two-bit triplet liquid controlled reversing valve.
Also being provided with return filter, the oil suction of described hydro-pump is connected with described hydraulic reservoir by described return filter.
Comprising two fluid-control one-way valves in described bidirectional hydraulic lock, the A mouth of described oil cylinder is connected without bar oil chamber by described fluid-control one-way valve and described oil cylinder, and the B mouth of described oil cylinder is connected with the oily chamber of bar that has of described oil cylinder by fluid-control one-way valve described in another.
Described hydro-pump is toothed gear pump.
Also comprising oil cylinder displacement sensor, described oil cylinder displacement sensor is positioned on described oil cylinder.
The advantage that the utility model has and positively effect be: a kind of emergent turn-off type electric controlled hydraulic actuator, is mainly characterized as the emergent function of band energy storage, and system works is divided into normal mode, emergent shutdown mode, manual pattern. When emergent shutdown mode, energy storage plays the effect of emergent energy source, it is not necessary to machine operation, therefore can not need bigger motor power, and the speed of closedown is faster. Native system has redundancy function, under emergent shutdown mode when power supply and normal control model lose, it is possible to accept the active signal of ESD of bypass, perform emergent turn-off function. Native system has interlock protection function, under normal mode or emergent shutdown mode, when higher level's Controlling System sends the emergent cut-off signals of ESD, will preferentially perform this signal and other switch signals of mechanical masking, avoids signal conflict to cause action disorder to lose efficacy. Native system has intelligent control system, according to the detection live signal of pressure transmitter, valve position sensor, can judge working state of system and implement adjustment. Native system integrating manual is met an urgent need function, non-transformer supply or without under energy storage energy storage state, it may be achieved manual operation unlatching, valve-off.
Accompanying drawing explanation
Fig. 1 is the system interface chart of a kind of emergent turn-off type electric controlled hydraulic actuator.
In figure:
1, hydraulic reservoir 2, oil cylinder 3, energy storage
4, pressure transmitter 5, return filter 6, motor
7, check valve 8, surplus valve 9, hydro-pump
10, manual pump 11, liquid controlled reversing valve 12, bidirectional hydraulic lock
13A, the first solenoid operated directional valve 13B, the 2nd solenoid operated directional valve 13E, the 3rd solenoid operated directional valve
14A, the first hand stop valve 14B, the 2nd hand stop valve 14C, the 3rd hand stop valve
14D, the 4th hand stop valve 14E, the 5th hand stop valve 15, adjustable throttling
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the utility model is elaborated.
As shown in Figure 1, a kind of emergent turn-off type electric controlled hydraulic actuator, comprises motor 6, hydro-pump 9, plug-in control valve, oil cylinder 2, energy storage 3, hydraulic reservoir 1, manual pump 10, pressure transmitter 4,
Described control valve comprises surplus valve 8, check valve 7, first solenoid operated directional valve 13A, the 2nd solenoid operated directional valve 13B, the 3rd solenoid operated directional valve 13E, liquid controlled reversing valve 11, first hand stop valve 14A, the 2nd hand stop valve 14B, the 3rd hand stop valve 14C, the 4th hand stop valve 14D, the 5th hand stop valve 14E, adjustable throttling 15, bidirectional hydraulic lock 12, the A mouth of described oil cylinder 2 is connected with described oil cylinder 2 by described bidirectional hydraulic lock 12 with B mouth
Described hydro-pump 9 is driven by described motor 6, the oil suction of described hydro-pump 9 is connected with described hydraulic reservoir 1, the oil outlet of described hydro-pump 9 is connected with the entrance of described check valve 7, the outlet of described check valve 7 is divided into ten road pipelines, one road pipeline connects the oil suction of described surplus valve 8, the oil return mouth of described surplus valve 8 connects described hydraulic reservoir 1, two road pipelines connect described manual pump 10, the oil suction of described manual pump 10 connects described hydraulic reservoir 1, three-way plece line connects described throttling valve 15 and described energy storage 3 successively, four road pipelines connect described first hand stop valve 14A and described hydraulic reservoir 1 successively, five road pipelines connect described pressure transmitter 4, six road pipelines and seven road pipelines connect described 2nd hand stop valve 14B entrance and described 3rd hand stop valve 14C entrance respectively, described 2nd hand stop valve 14B exports the B mouth with described oil cylinder 2 and connects, described 3rd hand stop valve 14C exports the A mouth with described oil cylinder 2 and connects, eight road pipelines connect the Z3 mouth of described 3rd solenoid operated directional valve 13E, nine road pipelines connect the Z1 mouth of described first solenoid operated directional valve 13A, ten road pipelines connect the Z2 mouth of described 2nd solenoid operated directional valve 13B, the Y3 mouth of described 3rd solenoid operated directional valve 13E is connected with the A mouth of described oil cylinder 2 and the X4 mouth of described liquid controlled reversing valve 11 respectively, the X3 mouth of described 3rd solenoid operated directional valve 13E is connected with the Y1 mouth of described first solenoid operated directional valve 13A, the X1 mouth of described first solenoid operated directional valve 13A connects described hydraulic reservoir 1 by described 4th hand stop valve 14D, the Y4 mouth of described liquid controlled reversing valve 11 is connected with the Y2 mouth of described 2nd solenoid operated directional valve 13B, the Z4 mouth of described liquid controlled reversing valve 11 connects the B mouth of described oil cylinder 2, the Q4 mouth of described liquid controlled reversing valve 11 connects described hydraulic reservoir 1, the X2 mouth of described 2nd solenoid operated directional valve 13B is connected with described hydraulic reservoir 1 by described 5th hand stop valve 14E.
Described first solenoid operated directional valve 13A, described 2nd solenoid operated directional valve 13B and described 3rd solenoid operated directional valve 13E are two-bit triplet solenoid operated directional valve.
Described liquid controlled reversing valve 11 is two-bit triplet liquid controlled reversing valve.
Also being provided with return filter 5, the oil suction of described hydro-pump 9 is connected with described hydraulic reservoir 1 by described return filter 5.
Two fluid-control one-way valves are comprised in described bidirectional hydraulic lock 12, the A mouth of described oil cylinder 2 is connected without bar oil chamber by described fluid-control one-way valve and described oil cylinder 2, and the B mouth of described oil cylinder 2 is connected with the oily chamber of bar that has of described oil cylinder 2 by fluid-control one-way valve described in another.
Described hydro-pump 9 is toothed gear pump.
Also comprising oil cylinder displacement sensor, described oil cylinder displacement sensor is positioned on described oil cylinder 2.
A kind of emergent turn-off type electric controlled hydraulic actuator, for the shutoff under the normal switch of valve and air door and emergency situation, is mainly characterized as band energy storage 3 and meets an urgent need function, and system works is divided into normal manipulation mode, emergent shutdown mode, manual pattern.
When emergent shutdown mode, energy storage 3 plays the effect of emergent energy source, it is not necessary to motor 6 works, and therefore can not need bigger motor power, and the speed of closedown is faster. Native system has redundancy function, under emergent shutdown mode when power supply and normal control model lose, it is possible to accept the active signal of ESD of bypass, perform emergent turn-off function. Native system has interlock protection function, under normal mode or emergent shutdown mode, when higher level's Controlling System sends the emergent cut-off signals of ESD, will preferentially perform this signal and other switch signals of mechanical masking, avoids signal conflict to cause action disorder to lose efficacy.
Native system has intelligent control system, according to the detection live signal of pressure transmitter 4, oil cylinder displacement sensor, can judge working state of system and implement adjustment.
Native system integrating manual is met an urgent need function, non-transformer supply or without under energy storage 3 energy storage state, it may be achieved manual operation unlatching, valve-off.
Normal manipulation mode can be divided into again energy storage to fill liquid, energy storage pressurize, open and close valve operation operating mode.
Energy storage fills liquid operating mode: when system starts, control valve is all in power failure state, and motor 6 starts, hydro-pump 9 is driven to start to carry out filling liquid to energy storage 3, when pressure transmitter 4 pressure arrives setting pressure upper limit P (MAX), motor 6 time delay stops, and system enters pressurize operating mode.
Pressurize operating mode: system pressure arrives set(ting)value, motor 6 stops, pressure transmitter 4 continues to monitor system pressure, when pressure is less than setting pressure lower limit P (MIN), automatically enter and fill liquid status, motor 6 starts, and drives hydro-pump 9 that energy storage 3 is filled liquid, until pressure reaches capping value.
Open and close valve operation operating mode: when topworks carries out closing valve operation, motor 6 stops, first solenoid operated directional valve 13A obtains electric, pressure oil in energy storage 3 is through throttling valve 15, enter the Z1 mouth of two-bit triplet first solenoid operated directional valve 13A, go out the Y1 mouth of the first solenoid operated directional valve 13A, because for emergency use the 3rd solenoid operated directional valve 13E is in power failure state, X3, Y3 mouth conducting of the 3rd solenoid operated directional valve 13E, pressure oil enters the oily mouth A of described oil cylinder 2, entered the rodless cavity of oil cylinder 2 by bidirectional hydraulic lock 12, promote piston action, valve-off.
The simultaneously oil return of the rod chamber of oil cylinder 2, successively through the oily mouth B of oil cylinder 2, the Z4 mouth of liquid controlled reversing valve 11, Y4 mouth, through Y2 mouth, the X2 mouth of the 2nd solenoid operated directional valve 13B, then flows back to fuel tank 1 through the 5th hand stop valve 14E often opened.
When topworks carries out the operation of valve opening door, motor 6 stops, and the 2nd solenoid operated directional valve 13B obtains electric, and the pressure oil in energy storage 3 is through throttling valve 15, enter the Z2 mouth of two-bit triplet the 2nd solenoid operated directional valve 13B, going out the Y2 mouth of the 2nd solenoid operated directional valve 13B, at this moment liquid controlled reversing valve 11 is in power failure state, Z4, Y4 mouth conducting of liquid controlled reversing valve 11, pressure oil enters the oily mouth B of oil cylinder 2, entered the rod chamber of oil cylinder 2 by bidirectional hydraulic lock 12, promote piston action, Open valve.
The oil return of the rodless cavity of oil cylinder 2 simultaneously, through oil mouth A, through X3 mouth, the Y3 mouth of for emergency use the 3rd solenoid operated directional valve 13E, through Y1 mouth, the X1 mouth of the first solenoid operated directional valve 13A, then flows back to fuel tank 1 through the 4th hand stop valve 14D often opened.
Emergent shutdown mode: system dead electricity or when sending urgent instruction, for emergency use the 3rd solenoid operated directional valve 13E obtains electric, pressure oil in energy storage 3 is through throttling valve 15, enter the Z3 mouth of two-bit triplet the 3rd solenoid operated directional valve 13E, going out the Y3 mouth of the 3rd solenoid operated directional valve 13E, pressure oil enters the oily mouth A of oil cylinder 2, is entered the rodless cavity of oil cylinder 2 by bidirectional hydraulic lock 12, promote piston action, valve-off.
Meanwhile, the Y3 mouth pressure oil of two-bit triplet the 3rd solenoid operated directional valve 13E acts on the X4 mouth of liquid controlled reversing valve 11, and Z4, Q4 mouth conducting of liquid controlled reversing valve 11, the oil return of the oily mouth B of oil cylinder 2 flows back to fuel tank 1 through the Q4 mouth of liquid controlled reversing valve 11.
In system dead electricity situation, the active signal of bypass that for emergency use the 3rd solenoid operated directional valve 13E work signal provides independent by higher level's Controlling System, avoids the first solenoid operated directional valve 13A/ the 2nd solenoid operated directional valve 13B dead electricity of switch-valve to work.
Under emergency situation, higher level's Controlling System provides emergency parachute to for emergency use the 3rd solenoid operated directional valve 13E, and for emergency use the 3rd solenoid operated directional valve 13E obtains electric, Y3, Z3 mouth conducting of the 3rd solenoid operated directional valve 13E, the X3 mouth cut-off of the 3rd solenoid operated directional valve.
If now system is in close valve state: the first solenoid operated directional valve 13A closing valve obtains electric, energy storage 3 pressure oil is by closing valve with the Z1 mouth of the first solenoid operated directional valve 13A to Y mouth conducting, but owing to for emergency use the 3rd solenoid operated directional valve 13E obtains electric, the X3 mouth cut-off of the 3rd solenoid operated directional valve 13E, close the valve pressure oil of the first magnetic valve 13A to be cut off, system acting can not be had an impact.
If now system is in valve opening state: valve opening obtains electric with the 2nd magnetic valve 13B, energy storage 3 pressure oil by valve opening with the Z mouth of the 2nd magnetic valve 13B to Y mouth conducting, but owing to for emergency use the 3rd solenoid operated directional valve 13E obtains electric work, the pressure oil of oil mouth A mouth acts on the X4 mouth of liquid controlled reversing valve 11, Z4, Q4 mouth conducting of liquid controlled reversing valve 11, Y mouth is cut off, and the valve opening Y2 mouth top hole pressure oil of the 2nd solenoid operated directional valve 13B is cut off, and can not be had an impact by system acting.
Described system adopts the mode of mechanical interlocked protection to achieve emergent cut-off signals to have the highest priority level, shield the interference that normal switching signal is possible, have higher safe reliability.
Manual operation mode: when interruption maintenance, situation extreme without automatically controlled signal etc., it is possible to adopt manual operation. Open the 3rd hand stop valve 14C of the oily mouth A connecting oil cylinder 2, close oil return the 4th hand stop valve 14D simultaneously, it is possible to realize closing valve operation. Open the 2nd hand stop valve 14B of the oily mouth B connecting oil cylinder 2, close oil return the 5th hand stop valve 14E simultaneously, it is possible to realize valve opening operation.It is to repeat aforesaid operations when energy storage 3 does not fill liquid status, and handles with manual pump 10 and pressure oil-source is provided, carry out switch-valve work.
Above embodiment of the present utility model is described in detail, but described content is only better embodiment of the present utility model, the practical range for limiting the present invention can not be considered to. All equalizations done according to the utility model scope change and improvement etc., all should still belong within this patent covering scope.
Claims (7)
1. an emergent turn-off type electric controlled hydraulic actuator, it is characterised in that: comprise motor, hydro-pump, plug-in control valve, oil cylinder, energy storage, hydraulic reservoir, manual pump, pressure transmitter,
Described control valve comprises surplus valve, check valve, the first solenoid operated directional valve, the 2nd solenoid operated directional valve, the 3rd solenoid operated directional valve, liquid controlled reversing valve, the first hand stop valve, the 2nd hand stop valve, the 3rd hand stop valve, the 4th hand stop valve, the 5th hand stop valve, adjustable throttling, bidirectional hydraulic lock, the A mouth of described oil cylinder is connected with described oil cylinder by described bidirectional hydraulic lock with B mouth
Described hydro-pump is driven by described motor, the oil suction of described hydro-pump is connected with described hydraulic reservoir, the oil outlet of described hydro-pump is connected with the entrance of described check valve, the outlet of described check valve is divided into ten road pipelines, one road pipeline connects the oil suction of described surplus valve, the oil return mouth of described surplus valve connects described hydraulic reservoir, two road pipelines connect described manual pump, the oil suction of described manual pump connects described hydraulic reservoir, three-way plece line connects described throttling valve and described energy storage successively, four road pipelines connect described first hand stop valve and described hydraulic reservoir successively, five road pipelines connect described pressure transmitter, six road pipelines and seven road pipelines connect described 2nd hand stop valve entrance and described 3rd manual shutoff valve inlet respectively, described 2nd hand stop valve outlet connects with the B mouth of described oil cylinder, the A mouth of described 3rd manual shutoff valve outlet port and described oil cylinder connects, eight road pipelines connect the Z3 mouth of described 3rd solenoid operated directional valve, nine road pipelines connect the Z1 mouth of described first solenoid operated directional valve, ten road pipelines connect the Z2 mouth of described 2nd solenoid operated directional valve, the Y3 mouth of described 3rd solenoid operated directional valve is connected with the A mouth of described oil cylinder and the X4 mouth of described liquid controlled reversing valve respectively, the X3 mouth of described 3rd solenoid operated directional valve is connected with the Y1 mouth of described first solenoid operated directional valve, the X1 mouth of described first solenoid operated directional valve connects described hydraulic reservoir by described 4th hand stop valve, the Y4 mouth of described liquid controlled reversing valve is connected with the Y2 mouth of described 2nd solenoid operated directional valve, the Z4 mouth of described liquid controlled reversing valve connects the B mouth of described oil cylinder, the Q4 mouth of described liquid controlled reversing valve connects described hydraulic reservoir, the X2 mouth of described 2nd solenoid operated directional valve is connected with described hydraulic reservoir by described 5th hand stop valve.
2. the emergent turn-off type electric controlled hydraulic actuator of one according to claim 1, it is characterised in that: described first solenoid operated directional valve, described 2nd solenoid operated directional valve and described 3rd solenoid operated directional valve are two-bit triplet solenoid operated directional valve.
3. the emergent turn-off type electric controlled hydraulic actuator of one according to claim 1, it is characterised in that: described liquid controlled reversing valve is two-bit triplet liquid controlled reversing valve.
4. the emergent turn-off type electric controlled hydraulic actuator of one according to claim 1, it is characterised in that: being also provided with return filter, the oil suction of described hydro-pump is connected with described hydraulic reservoir by described return filter.
5. the emergent turn-off type electric controlled hydraulic actuator of one according to claim 1, it is characterized in that: in described bidirectional hydraulic lock, comprise two fluid-control one-way valves, the A mouth of described oil cylinder is connected without bar oil chamber by described fluid-control one-way valve and described oil cylinder, and the B mouth of described oil cylinder is connected with the oily chamber of bar that has of described oil cylinder by fluid-control one-way valve described in another.
6. the emergent turn-off type electric controlled hydraulic actuator of one according to claim 1, it is characterised in that: described hydro-pump is toothed gear pump.
7. the emergent turn-off type electric controlled hydraulic actuator of one according to claim 1, it is characterised in that: also comprising oil cylinder displacement sensor, described oil cylinder displacement sensor is positioned on described oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620066941.XU CN205298092U (en) | 2016-01-22 | 2016-01-22 | Automatically controlled hydraulic actuator of emergent shutoff type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620066941.XU CN205298092U (en) | 2016-01-22 | 2016-01-22 | Automatically controlled hydraulic actuator of emergent shutoff type |
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| Publication Number | Publication Date |
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| CN205298092U true CN205298092U (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620066941.XU Expired - Fee Related CN205298092U (en) | 2016-01-22 | 2016-01-22 | Automatically controlled hydraulic actuator of emergent shutoff type |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286442A (en) * | 2016-10-19 | 2017-01-04 | 西安奥邦科技有限责任公司 | A kind of mid-frequency melting furnace Hydraulic Station manual pump device |
| CN109707675A (en) * | 2019-01-02 | 2019-05-03 | 武汉船用机械有限责任公司 | A kind of security system for crude oil exporting device |
| CN110671392A (en) * | 2019-09-30 | 2020-01-10 | 福建龙马环卫装备股份有限公司 | Hydraulic system with integral box hopper with manual emergency lifting function |
| CN114198347A (en) * | 2021-12-15 | 2022-03-18 | 中国石化销售股份有限公司华南分公司 | Hydraulic control system of safety cut-off valve |
| CN114370524A (en) * | 2021-12-15 | 2022-04-19 | 西安航天动力研究所 | Fireproof emergency shutdown electro-hydraulic control system |
| CN114476947A (en) * | 2021-12-29 | 2022-05-13 | 中联重科股份有限公司 | Emergency hydraulic system and automobile crane |
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2016
- 2016-01-22 CN CN201620066941.XU patent/CN205298092U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286442A (en) * | 2016-10-19 | 2017-01-04 | 西安奥邦科技有限责任公司 | A kind of mid-frequency melting furnace Hydraulic Station manual pump device |
| CN109707675A (en) * | 2019-01-02 | 2019-05-03 | 武汉船用机械有限责任公司 | A kind of security system for crude oil exporting device |
| CN110671392A (en) * | 2019-09-30 | 2020-01-10 | 福建龙马环卫装备股份有限公司 | Hydraulic system with integral box hopper with manual emergency lifting function |
| CN114198347A (en) * | 2021-12-15 | 2022-03-18 | 中国石化销售股份有限公司华南分公司 | Hydraulic control system of safety cut-off valve |
| CN114370524A (en) * | 2021-12-15 | 2022-04-19 | 西安航天动力研究所 | Fireproof emergency shutdown electro-hydraulic control system |
| CN114198347B (en) * | 2021-12-15 | 2024-03-19 | 中国石油化工股份有限公司 | Safety cut-off valve hydraulic control system |
| CN114476947A (en) * | 2021-12-29 | 2022-05-13 | 中联重科股份有限公司 | Emergency hydraulic system and automobile crane |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20170122 |
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| CF01 | Termination of patent right due to non-payment of annual fee |