CN105605002A - Decompression-preventing hydraulic control loop and method thereof - Google Patents
Decompression-preventing hydraulic control loop and method thereof Download PDFInfo
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- CN105605002A CN105605002A CN201610158064.3A CN201610158064A CN105605002A CN 105605002 A CN105605002 A CN 105605002A CN 201610158064 A CN201610158064 A CN 201610158064A CN 105605002 A CN105605002 A CN 105605002A
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- hydraulic
- valve
- hydraulic cylinder
- control
- decompression
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/862—Control during or prevention of abnormal conditions the abnormal condition being electric or electronic failure
- F15B2211/8623—Electric supply failure
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
Abstract
The invention provides a decompression-preventing hydraulic control loop and a method thereof. The hydraulic control loop comprises, at least, an integrated hydraulic cylinder and an oil-way cutting-off hydraulic loop, wherein the integrated hydraulic cylinder comprises a hydraulic cylinder body and a hydraulic cylinder integrated valve block, the hydraulic cylinder integrated valve block is installed on the hydraulic cylinder and used for controlling start and stop of the hydraulic cylinder and locking of the hydraulic cylinder during system decompression, and the hydraulic cylinder integrated valve block is connected with the oil-way cutting-off hydraulic loop and used for controlling actions of the hydraulic cylinder and cutting off of an oil way of the hydraulic cylinder during system decompression. The invention further provides the method for achieving the decompression-preventing hydraulic control loop. The decompression-preventing hydraulic control loop has the advantages of being simple in structure, safe, reliable and quick in accident response, being unlimited in hydraulic cylinder installation direction and being of a load type and can be combined with external pressure monitoring to achieve predictive control of system accidents. In addition, when a control system is accidentally powered off, the hydraulic cylinder is in a safe locked state. The decompression-preventing hydraulic control loop is suitable for the occasion having the higher requirements for a hydraulic cylinder stop position state during system decompression.
Description
Technical field
The invention belongs to mechanical engineering technical field, particularly relate to the lifting process of metallurgical equipment, engineering machinery, heavy vehicleIn prevent hydraulic control circuit and the method thereof of hydraulic cylinder decompression.
Background technology
Hydraulic control circuit is by several Hydraulic Elements (hydraulic power unit or hydraulic power supply, conduit under fluid pressure, control valve platform and hydraulic pressureCylinder) form, be used for having controlled the oil channel structures of specific function, be widely used in metallurgical equipment, engineering machinery, heavy goods vehiclesEtc. mechanical engineering technical field. In the hydraulic control circuit of these equipment, exist a large amount of hydraulic cylinder lifting control loops, itsFeature is that load is large, work under bad environment, and particularly flexible pipe is easily aging to cause hydraulic control component or hydraulic cylinder external pipeExplosion, causes the unexpected decompression of system, and great falling accident easily occurs. Occur for fear of falling accident, hydraulic system is commonCorresponding o-volt protection measure need to be set.
But the o-volt protection scheme of existing hydraulic cylinder setting adopts explosion-proof valve more, by pacifying between hydraulic cylinder and flexible pipeDress explosion-proof valve, in the time entering the pipeline generation explosion of explosion-proof valve, by the fluid of explosion-proof valve confining liquid cylinder pressure arranging, thereby preventsThe security incident causing during because of decompression. Explosion-proof valve forward is normal circulation, is oppositely improper circulation, when its improper streamWhen logical, the pressure differential at explosion-proof valve two ends can not be greater than the spring pressure of establishing in explosion-proof valve, otherwise just can not reverse flow. Explosion-proof valveOperation principle has determined that the spring pressure of explosion-proof valve arranges must be rationally, if arrange unreasonablely, just may occur hydraulic cylinder declineWhen speed slowly or fault occurs, cannot cut off rapidly oil circuit, thereby increase the weight of accident (Crash) severity. In addition, explosion-proof valve is by two chambeiesPressure differential lock hydraulic cylinder, be more suitable for the occasion of normal load, for horizontal load or without the hydraulic pressure of external loadingWhen cylinder decompression, cannot effectively lock Position of Hydraulic Cylinder. Also there is misoperation in the mode of meanwhile, controlling switching by pressure differentialPossibility.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of anti-decompression hydraulic control circuit andMethod, except comprising the scope of existing explosion-proof valve decompression control loop, also for solving prior art hydraulic control circuit,During in horizontal load or without the hydraulic cylinder decompression of external loading, cannot effectively lock the problem of Position of Hydraulic Cylinder; In addition, work as controlWhen system during accidental power failure, hydraulic cylinder also can be combined the lock-out state in safety with external pressure monitoring and realize the pre-of systematic failuresThe property surveyed control.
For achieving the above object and other relevant objects, the invention provides a kind of hydraulic control circuit of anti-decompression, comprising:
Described hydraulic control circuit at least comprises integrated hydraulic cylinder and oil circuit cutting-off liquid hydraulic circuit, and described integrated hydraulic cylinder comprises hydraulic pressureCylinder and hydraulic cylinder integrated valve block, described hydraulic cylinder integrated valve block is installed on described hydraulic cylinder for controlling hydraulic cylinder start and stop and systemWhen decompression, lock hydraulic cylinder, described hydraulic cylinder integrated valve block is connected with described oil circuit cutting-off liquid hydraulic circuit and cuts off when not normal for hydraulic pressureThe oil circuit of described hydraulic cylinder.
Preferably, described hydraulic cylinder integrated valve block comprises the first control valve, the first hydraulic control one-way valve and the second hydraulic control one-way valve, instituteThe first hydraulic fluid port of stating the first control valve connects one end of described the first hydraulic control one-way valve, and the other end of described the first hydraulic control one-way valve connectsConnect the rodless cavity of described hydraulic cylinder; The second hydraulic fluid port of described the first control valve connects one end of described the second hydraulic control one-way valve, described inThe other end of the second hydraulic control one-way valve connects the rod chamber of described hydraulic cylinder.
Preferably, described oil circuit cutting-off liquid hydraulic circuit comprises the second control valve, and the first hydraulic fluid port of described the second control valve connects outsideThe first hydraulic fluid port of power source, the second hydraulic fluid port of described the second control valve connects the second hydraulic fluid port of described external power supply, described secondThe 3rd hydraulic fluid port of control valve connects the 3rd hydraulic fluid port of described the first control valve, described the first control valve the 4th hydraulic fluid port connect described outsideThe second hydraulic fluid port of portion's power source.
Preferably, described the first control valve is appointing in solenoid directional control valve, electro-hydraulic reversing valve, inserted valve, proportioning valve or servo valveMeaning is a kind of.
Preferably, described the second control valve is any one in Solenoid seated valve, solenoid directional control valve, electro-hydraulic reversing valve or inserted valve.
Preferably, described hydraulic cylinder integrated valve block also comprises overflow valve and check valve, described in described overflow valve is installed on for pressure releaseBetween the first hydraulic control one-way valve and the rodless cavity of described hydraulic cylinder, described check valve is installed on described the second fluid-control one-way for repairingBetween valve and the rod chamber of described hydraulic cylinder; Or described check valve is installed on described the first hydraulic control one-way valve and institute for repairingState between the rodless cavity of hydraulic cylinder, described overflow valve is installed on having of described the second hydraulic control one-way valve and described hydraulic cylinder for pressure releaseBetween bar chamber.
Preferably, described the first control valve, described the second control valve and described hydraulic cylinder are equipped with in its hydraulic fluid port junction to measure and pressThe pressure tap of power.
The method of work that another object of the present invention is to the hydraulic control circuit that a kind of anti-decompression is provided, comprising:
Detect whether pressure anomaly of hydraulic control circuit;
In the time of flexible pipe explosion or system decompression, pressure anomaly in hydraulic control circuit, described first and second hydraulic control one-way valve automatic lockingDetermine hydraulic cylinder;
When the pressure tap arranging when external power supply detects in hydraulic control circuit pressure anomaly, start in oil circuit cutting-off liquid hydraulic circuitThe second control valve is closed the oil circuit of hydraulic cylinder;
When in detection hydraulic control circuit, pressure is normal, without operation.
As mentioned above, the hydraulic control circuit of anti-decompression of the present invention and method thereof, have following beneficial effect:
(1) the invention provides a kind of hydraulic control circuit of the simple and reliable anti-decompression of hydraulic cylinder, have simple in structure, safety canBy, the fast feature of incident response, and can combine the predictability control that realizes systematic failures with external pressure monitoring, and when controlling systemWhen system during accidental power failure, hydraulic cylinder is by the lock-out state in safety. While being applicable to hydraulic cylinder decompression, hydraulic cylinder off-position state is hadThe occasion of high request.
(2) the present invention does not need hydraulic control valve spring force manually to arrange, and has reduced the artificial technology of hydraulic control system poorThe different impact on systematic function.
(3) the present invention does not limit hydraulic cylinder installation direction and load pattern, has expanded the control of existing explosion-proof valve o-volt protection hydraulic pressureThe range of application in loop processed.
Brief description of the drawings
Fig. 1 is shown as the hydraulic control circuit schematic diagram of anti-decompression of the present invention;
Fig. 2 is shown as the hydraulic control circuit example structure block diagram of anti-decompression of the present invention;
Fig. 3 is shown as the hydraulic control circuit method of work flow chart of anti-decompression of the present invention.
Element numbers explanation
1 hydraulic cylinder
2 hydraulic cylinder integrated valve blocks
3 oil circuit cutting-off liquid hydraulic circuits
4 power sources
5 first control valves
6 first hydraulic control one-way valves
7 second hydraulic control one-way valves
8 second control valves
9 overflow valves
10 check valves
R1 flexible pipe
R2 hard tube
T1～T6 pressure tap
Detailed description of the invention
Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can be disclosed by this descriptionContent understand easily other advantages of the present invention and effect. The present invention can also add by other different detailed description of the inventionTo implement or application, the every details in this description also can, based on different viewpoints and application, not deviate from essence of the present inventionUnder god, carry out various modifications or change. It should be noted that, in the situation that not conflicting, the feature in following examples and embodimentCan mutually combine.
It should be noted that, the diagram providing in following examples only illustrates basic conception of the present invention in a schematic way, then figureIn formula, only show with assembly relevant in the present invention but not component count, shape and size drafting while implementing according to reality, in factWhen implement on border, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may more be answeredAssorted.
Refer to Fig. 1, the invention provides a kind of hydraulic control circuit schematic diagram of anti-decompression, described hydraulic control circuit at least wrapsDraw together integrated hydraulic cylinder and oil circuit cutting-off liquid hydraulic circuit 3, described integrated hydraulic cylinder comprises hydraulic cylinder 1 and hydraulic cylinder integrated valve block 2, instituteStating hydraulic cylinder integrated valve block 2 is installed on described hydraulic cylinder 1 for controlling hydraulic cylinder start and stop (start and stop) and system decompressionShi Suoding hydraulic cylinder 1, described hydraulic cylinder integrated valve block 2 is connected with described oil circuit cutting-off liquid hydraulic circuit 3, described oil circuit cutting-off liquidHydraulic circuit 3 is connected with external power supply 4, cuts off the oil circuit of described hydraulic cylinder 1 during for system decompression.
Wherein, the side that described hydraulic cylinder integrated valve block 2, described oil circuit cutting-off liquid hydraulic circuit 3 are connected with described external power supply 4Formula all adopts pipeline to connect, and this pipeline comprises flexible pipe R1, hard tube R2 etc.; In addition, in this application, the company between all devicesConnect all preferably pipeline connections of mode.
On described hydraulic cylinder 1, hydraulic cylinder integrated valve block 2 is installed, described hydraulic cylinder integrated valve block 2 cuts off hydraulic pressure with described oil circuitLoop 3 is specific as follows:
Described hydraulic cylinder integrated valve block 2 comprises the first control valve 5, the first hydraulic control one-way valve 6 and the second hydraulic control one-way valve 7, described inThe first hydraulic fluid port of the first control valve 5 connects one end of described the first hydraulic control one-way valve 6, another of described the first hydraulic control one-way valve 6End connects the rodless cavity of described hydraulic cylinder 1; The second hydraulic fluid port of described the first control valve 5 connects described the second hydraulic control one-way valve 7One end, the other end of described the second hydraulic control one-way valve 7 connects the rod chamber of described hydraulic cylinder 1, when the first control valve 5 receivesAfter the action command of hydraulic cylinder 1, according to its control instruction, control the commutation of the first control valve 5, realize the control to hydraulic cylinder 1State.
Described oil circuit cutting-off liquid hydraulic circuit 3 comprises the second control valve 8, and the first hydraulic fluid port of described the second control valve 8 connects outside movingFirst hydraulic fluid port in power source 4, the second hydraulic fluid port of described the second control valve 8 connects the second hydraulic fluid port of described external power supply 4, described inThe 3rd hydraulic fluid port of the second control valve 8 connects the 3rd hydraulic fluid port of described the first control valve 5, the 4th hydraulic fluid port of described the first control valve 5Connect the second hydraulic fluid port of described external power supply 4, realize hydraulic pressure break-make by the second control valve 8 commutations, thereby control hydraulic cylinderThe switching of 1 duty, shutdown or accident condition.
Wherein, described the first control valve 5 is appointing in solenoid directional control valve, electro-hydraulic reversing valve, inserted valve, proportioning valve or servo valveMeaning is a kind of; Described the second control valve 8 is any one in Solenoid seated valve, solenoid directional control valve, electro-hydraulic reversing valve or inserted valve.
Particularly, described hydraulic cylinder integrated valve block 2 also comprises overflow valve 9 and check valve 10, and described overflow valve 9 is pacified for pressure releaseBe loaded between described the first hydraulic control one-way valve 6 and the rodless cavity of described hydraulic cylinder 1, described check valve 10 is installed on institute for repairingState between the second hydraulic control one-way valve 7 and the rod chamber of described hydraulic cylinder 1; Or described check valve 10 is installed on institute for repairingState between the first hydraulic control one-way valve 6 and the rodless cavity of described hydraulic cylinder 1, described overflow valve 9 is installed on described second for pressure releaseBetween the rod chamber of hydraulic control one-way valve 7 and described hydraulic cylinder 1.
Described overflow valve 9 is interchangeable with the position that check valve 10 is installed, and in this example, hydraulic cylinder 1 is subject to foreign impacts or itsIts failure cause makes its trend that has retraction, while causing its hydraulic cylinder 1 rodless cavity pressure to be greater than the safe pressure bearing, and hydraulic cylinder1 can pass through overflow valve 9 overflows, reaches and falls low-risk object; When the rod chamber of described hydraulic cylinder 1 occurs inhaling sky, can lead toCross the rod chamber repairing of check valve 10 to hydraulic cylinder 1, thereby arrive the object of protection, otherwise, when the rodless cavity of hydraulic cylinder 1 goes outWhile now inhaling sky, can pass through the rodless cavity repairing of check valve 10 to hydraulic cylinder 1, when hydraulic cylinder 1 rod chamber pressure is greater than the peace of bearingWhen total pressure, hydraulic cylinder 1 can pass through overflow valve 9 overflows, reaches and falls low-risk object.
Particularly, described the first control valve 5, described the second control valve 8 are equipped with in its hydraulic fluid port junction with described hydraulic cylinder 1The pressure tap of gaging pressure (can Bonding pressure table), in the present embodiment, can detect the first control at any time by the pressure tap arrangingValve 5 processed, the second control valve 8 and hydraulic cylinder 1 pressure, for attendant's monitoring.
Referring to Fig. 2, is the hydraulic control circuit example structure block diagram of anti-decompression of the present invention, wherein, and in this embodimentThe preferred solenoid directional control valve of one control valve 5, the second control valve 8 is preferably Solenoid seated valve, and concrete syndeton is as follows:
Described hydraulic cylinder integrated valve block 2 comprises solenoid directional control valve, the first hydraulic control one-way valve 6 and the second hydraulic control one-way valve 7, described inThe first hydraulic fluid port of solenoid directional control valve connects one end of described the first hydraulic control one-way valve 6, the other end of described the first hydraulic control one-way valve 6Connect the rodless cavity of described hydraulic cylinder 1; The second hydraulic fluid port of described solenoid directional control valve connects one end of described the second hydraulic control one-way valve 7,The other end of described the second hydraulic control one-way valve 7 connects the rod chamber of described hydraulic cylinder 1.
Between described the first hydraulic control one-way valve 6 and the rodless cavity of described hydraulic cylinder 1, be provided with the overflow valve 9 for pressure release, describedBetween two hydraulic control one-way valves 7 and the rod chamber of described hydraulic cylinder 1, be provided with the check valve for repairing, wherein, one of overflow valve 9End is connected on the pipeline between described the first hydraulic control one-way valve 6 and the rodless cavity of described hydraulic cylinder 1, and its other end is connected to instituteState on the pipeline of the 4th hydraulic fluid port of solenoid directional control valve and the second hydraulic fluid port of external power supply 4; One end of check valve is connected to describedOn pipeline between two hydraulic control one-way valves 7 and the rod chamber of described hydraulic cylinder 1, its other end is connected to described solenoid directional control valveOn the pipeline of the second hydraulic fluid port of the 4th hydraulic fluid port and external power supply 4.
Described oil circuit cutting-off liquid hydraulic circuit 3 comprises Solenoid seated valve, the first hydraulic fluid port connection external power supply 4 of described Solenoid seated valveThe first hydraulic fluid port, the second hydraulic fluid port of described Solenoid seated valve connects the second hydraulic fluid port of described external power supply 4, of described Solenoid seated valveThree hydraulic fluid ports are connected the 3rd hydraulic fluid port of described solenoid directional control valve, the 4th hydraulic fluid port of described solenoid directional control valve with the combination of flexible pipe by hard tubeBe connected the second hydraulic fluid port of described external power supply 4 with the combination of flexible pipe by hard tube.
Wherein, on the 3rd hydraulic fluid port of Solenoid seated valve, be provided with pressure tap T1, connect external impetus at the 4th hydraulic fluid port of solenoid directional control valveThe second hydraulic fluid port pipeline in source 4 is provided with pressure tap T2, connects on the pipeline of Solenoid seated valve and is provided with at the 3rd hydraulic fluid port of solenoid directional control valvePressure tap T3, the 4th hydraulic fluid port of solenoid directional control valve connect overflow valve 9 and check valve pipeline on be provided with pressure tap T4,Hydraulic cylinder 1 connects on the pipeline of the first hydraulic control one-way valve 6 and is provided with pressure tap T5, connects the second hydraulic control one-way valve at hydraulic cylinder 1On 7 pipeline, be provided with pressure tap T6.
In this example, in the time of external control system generation power outage, the electromagnetism of described Solenoid seated valve and described solenoid directional control valveThe equal power-off of iron, cannot produce electromagnetic force; Meanwhile, the spool of described solenoid directional control valve is in meta, solenoid directional control valve and hydraulic cylinderThe first hydraulic fluid port, the second hydraulic fluid port and the 4th hydraulic fluid port that connect are connected all in passive state; The spool of Solenoid seated valve is also in dead electricity position,The second hydraulic fluid port of the 3rd hydraulic fluid port of the Solenoid seated valve being connected with solenoid directional control valve and external power supply is connected, the first hydraulic control one-way valve 6Close with the second hydraulic control one-way valve 7, cause hydraulic control circuit to be off-state by the oil circuit of hydraulic cylinder 1, until electric powerRecover just to enter reset mode.
Refer to Fig. 3, for the invention provides a kind of method of work of hydraulic control circuit of anti-decompression, comprising:
Step S301, detects whether pressure anomaly of hydraulic control circuit;
Step S302, in the time of flexible pipe explosion or system decompression, pressure anomaly in hydraulic control circuit, described first and second hydraulic control listAutomatically lock hydraulic cylinder 1 to valve;
Step S303, in the time that pressure tap that external power supply 4 arranges detects in hydraulic control circuit pressure anomaly, starts oil circuit and cutsIn disconnected hydraulic circuit 3, the second control valve 8 is closed the oil circuit of hydraulic cylinder 1;
Wherein, may there is arbitrarily a kind of situation in step S302 and step S303, also may all occur.
Step S304, when in detection hydraulic control circuit, pressure is normal, without operation.
In the present embodiment, in the time of flexible pipe explosion or system decompression, in hydraulic control circuit, occurring extremely (is hydraulic control circuitWhen the pressure anomaly of pressure tap T1, T3, T5 or the T6 of middle setting), under the oil circuit control pressure of first and second hydraulic control one-way valveFall, the first hydraulic control one-way valve 6, the second hydraulic control one-way valve 7 are directly closed, and reach the object of locking hydraulic cylinder 1. In addition, whenWhen pressure tap that external power supply 4 arranges detects in hydraulic control circuit pressure anomaly, by oil circuit control cutting-off liquid hydraulic circuit 3In the second control valve 8 make the oil circuit pressure feed of oil circuit cutting-off liquid cylinder pressure 1, reach the order that direct cutting-off liquid cylinder pressure 1 oil circuit is supplied with, thereby locking hydraulic cylinder 1 prevents that its decompression from causing security incident.
In sum, the present invention, by the first control valve is set, makes its commutation reach break-make pipeline oil pressure; Described in arrangingFirst and second hydraulic control one-way valve can be blinded off a line automatically according to loine pressure, has effectively avoided causing the peace such as fall because of oil pressure decompressionFull accident, has reached the effect of protection personnel and equipment; Meanwhile, the oil circuit being connected between power source and hydraulic cylinder integrated valve block is cutDisconnected hydraulic circuit, can supply with according to the oil pressure of control signal cutting-off liquid cylinder pressure, and be provided with excessive in the inside of hydraulic cylinder integrated valve blockStream valve and check valve, can prevent hydraulic cylinder superpressure and inhale empty. The present invention with respect to prior art have simple in structure, safe and reliable,Incident response soon, is not limit the feature of hydraulic cylinder installation direction and load pattern, and can combine and realize system thing with external pressure monitoringTherefore predictability control. And in the time of control system during accidental power failure, hydraulic cylinder is by the lock-out state in safety. Be applicable to hydraulic cylinderOccasion when decompression, hydraulic cylinder off-position state being had higher requirements. So the present invention has effectively overcome all lacking of the prior artPut and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention. Anyly be familiar with this skillThe personage of art all can, under spirit of the present invention and category, modify or change above-described embodiment. Therefore, such asUnder have in technical field conventionally know the knowledgeable do not depart under disclosed spirit and technological thought, complete all etc.Effect is modified or is changed, and must be contained by claim of the present invention.
Claims (8)
1. a hydraulic control circuit for anti-decompression, is characterized in that, described hydraulic control circuit at least comprises integrated hydraulic cylinder and oil circuitCutting-off liquid hydraulic circuit, described integrated hydraulic cylinder comprises hydraulic cylinder and hydraulic cylinder integrated valve block, described hydraulic cylinder integrated valve block is installedOn described hydraulic cylinder, lock hydraulic cylinder, described hydraulic cylinder integrated valve block and institute when controlling hydraulic cylinder start and stop and system decompressionState the oil circuit that cuts off described hydraulic cylinder when oil circuit cutting-off liquid hydraulic circuit is connected for system decompression.
2. the hydraulic control circuit of anti-decompression according to claim 1, is characterized in that, described hydraulic cylinder integrated valve block comprisesOne control valve, the first hydraulic control one-way valve and the second hydraulic control one-way valve, the first hydraulic fluid port of described the first control valve connects described firstOne end of hydraulic control one-way valve, the other end of described the first hydraulic control one-way valve connects the rodless cavity of described hydraulic cylinder; Described the first controlThe second hydraulic fluid port of valve processed connects one end of described the second hydraulic control one-way valve, described in the other end of described the second hydraulic control one-way valve connectsThe rod chamber of hydraulic cylinder.
3. the hydraulic control circuit of anti-decompression according to claim 2, is characterized in that, described oil circuit cutting-off liquid hydraulic circuit comprisesThe second control valve, the first hydraulic fluid port of described the second control valve connects the first hydraulic fluid port of external power supply, described the second control valveThe second hydraulic fluid port connects the second hydraulic fluid port of described external power supply, and the 3rd hydraulic fluid port of described the second control valve connects described first and controlsThe 3rd hydraulic fluid port of valve, the 4th hydraulic fluid port of described the first control valve connects the second hydraulic fluid port of described external power supply.
4. the hydraulic control circuit of anti-decompression according to claim 2, is characterized in that, described the first control valve is electromagnetic switchAny one in valve, electro-hydraulic reversing valve, inserted valve, proportioning valve or servo valve.
5. the hydraulic control circuit of anti-decompression according to claim 3, is characterized in that, described the second control valve be Solenoid seated valve,Any one in solenoid directional control valve, electro-hydraulic reversing valve or inserted valve.
6. the hydraulic control circuit of anti-decompression according to claim 2, is characterized in that, described hydraulic cylinder integrated valve block also comprisesOverflow valve and check valve, described overflow valve is installed on the rodless cavity of described the first hydraulic control one-way valve and described hydraulic cylinder for pressure releaseBetween, described check valve is installed between described the second hydraulic control one-way valve and the rod chamber of described hydraulic cylinder for repairing; Or,Described check valve is installed between described the first hydraulic control one-way valve and the rodless cavity of described hydraulic cylinder for repairing, described overflow valveBe installed between described the second hydraulic control one-way valve and the rod chamber of described hydraulic cylinder for pressure release.
7. the hydraulic control circuit of anti-decompression according to claim 3, is characterized in that, described the first control valve, described secondControl valve and described hydraulic cylinder are equipped with the pressure tap of gaging pressure in its hydraulic fluid port junction.
8. an implementation method that adopts the hydraulic control circuit of the arbitrary described anti-decompression of claim 1 to 7, comprising:
Detect whether pressure anomaly of hydraulic control circuit;
In the time of flexible pipe explosion or system decompression, pressure anomaly in hydraulic control circuit, described first and second hydraulic control one-way valve automatic lockingDetermine hydraulic cylinder;
When the pressure tap arranging when external power supply detects in hydraulic control circuit pressure anomaly, start in oil circuit cutting-off liquid hydraulic circuitThe second control valve is closed the oil circuit of hydraulic cylinder;
In the time that in detection hydraulic control circuit, pressure is normal, without operation.
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| CN201610158064.3A CN105605002B (en) | 2016-03-18 | 2016-03-18 | The hydraulic control circuit and its method of anti-decompression |
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| CN201610158064.3A CN105605002B (en) | 2016-03-18 | 2016-03-18 | The hydraulic control circuit and its method of anti-decompression |
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| CN107143544A (en) * | 2017-07-20 | 2017-09-08 | 江苏创格流体控制有限公司 | A kind of SMD micro hydraulic locking-valve block |
| CN109268325A (en) * | 2018-11-20 | 2019-01-25 | 燕山大学 | The electro-hydraulic driving unit of position control can be accurately protected towards Exceed load |
| CN110725832A (en) * | 2019-10-16 | 2020-01-24 | 北京首钢股份有限公司 | Hydraulic system air cavity removing device with hydraulic lock and method |
| CN115148539A (en) * | 2022-08-31 | 2022-10-04 | 深圳红冠机电科技有限公司 | Pressure relay, hydraulic control system and hydraulic lifting device |
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