CN212657069U - Oil cylinder lifting system - Google Patents

Abstract

The utility model provides an oil cylinder lifting system and an oil cylinder lifting control method, wherein the oil cylinder lifting system comprises an oil tank, an electric proportional variable pump assembly, a first electromagnetic directional valve, a balance valve, a pilot control constant delivery pump, an electric proportional pressure reducing valve, a jacking oil cylinder, a first pressure sensor and a second pressure sensor; the oil tank, the electric proportional variable pump assembly, the first electromagnetic directional valve and the jacking oil cylinder are sequentially communicated, and the balance valve is communicated with the jacking oil cylinder and the first electromagnetic directional valve; the oil tank, the pilot control constant delivery pump and the electric proportional pressure reducing valve are sequentially communicated, and the electric proportional pressure reducing valve is communicated with a pilot control port of the balance valve; the first pressure sensor is suitable for being arranged at a communication pipeline between the first electromagnetic directional valve and the balance valve, and the second pressure sensor is suitable for being arranged at a communication pipeline between the jacking oil cylinder and the balance valve. The utility model has the advantages that: the operation of the oil cylinder lifting system can be more reasonable and stable.

Description

Oil cylinder lifting system

Technical Field

The utility model relates to a hydraulic pressure technical field particularly, relates to an oil cylinder operating system.

Background

The cylinder lifting system, for example, a marine lifting platform working at sea is mainly applied to installation and maintenance of petroleum facilities or wind power systems in offshore and middle-offshore areas, and has high safety requirements, and stable and reliable operation and control are necessary indexes. In daily lifting control, the conditions of shaking or uneven speed of the platform when the platform is lowered at low speed and light load often occur.

In order to enable the platform to ascend and descend, an oil pressure control reverse balance valve is usually adopted for realizing, when the platform ascends and descends, and the control oil pressure of a system changes along with the pressure change of a platform jacking oil cylinder, the opening of the reverse balance valve is unstable due to the change of the oil pressure, and further the descending speed is fast and slow, and the shaking is generated.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem how to make hydro-cylinder operating system's operation reasonable more stable.

In order to solve the problems, the utility model provides an oil cylinder lifting system, which comprises an oil tank, an electric proportional variable pump assembly, a first electromagnetic directional valve, a balance valve, a pilot control constant delivery pump, an electric proportional pressure reducing valve, a jacking oil cylinder, a first pressure sensor and a second pressure sensor; the oil tank, the electric proportional variable pump assembly, the first electromagnetic directional valve and the jacking oil cylinder are sequentially communicated, and the balance valve is communicated with the jacking oil cylinder and the first electromagnetic directional valve; the oil tank, the pilot control constant delivery pump and the electric proportional pressure reducing valve are sequentially communicated, and the electric proportional pressure reducing valve is communicated with a pilot control port of the balance valve; the first pressure sensor is suitable for being arranged at a communication pipeline between the first electromagnetic directional valve and the balance valve, and the second pressure sensor is suitable for being arranged at a communication pipeline between the jacking oil cylinder and the balance valve.

In the technical scheme, the pressure value of the hydraulic oil in the pipeline between the first electromagnetic directional valve and the balance valve and the pressure value of the hydraulic oil in the pipeline between the jacking oil cylinder and the balance valve can be detected through the first pressure sensor and the second pressure sensor, so that the telescopic operation condition of the jacking oil cylinder can be accurately determined, thereby being capable of more conveniently controlling the electric proportional displacement control valve of the electric proportional variable pump assembly, ensuring the stable extension or retraction of the jacking oil cylinder, ensuring the stable lifting of the corresponding platform, avoiding shaking, or, according to the comparison condition of the two pressure values, the electric proportional pressure reducing valve can be more conveniently controlled to improve the extending or retracting speed of the jacking oil cylinder, therefore, the difficulty in running of the platform is avoided, and correspondingly, the running speed of the platform can be reduced, so that the running of the platform can be reasonably regulated.

Further, the first electromagnetic directional valve comprises a first working port and a second working port, the balance valve comprises a first balance valve and a second balance valve, the first balance valve is communicated with the first working port and the rodless cavity oil port of the jacking oil cylinder, and the second balance valve is communicated with the second working port and the rod cavity oil port of the jacking oil cylinder.

The pilot control constant delivery pump, the first pressure reducing valve and the rod cavity oil port are communicated in sequence, and the pilot control constant delivery pump, the first pressure reducing valve, the first overflow valve and the oil tank are communicated in sequence.

The oil tank is characterized by further comprising a throttle valve and a switch valve, the rodless cavity oil port, the throttle valve, the switch valve and the rod cavity oil port are sequentially communicated, and a pipeline between the rod cavity oil port and the switch valve, the first overflow valve and the oil tank are sequentially communicated.

The system further comprises a pilot control emergency energy accumulator, a second electromagnetic directional valve, a third electromagnetic directional valve and a second overflow valve, wherein a pipeline between the pilot control constant delivery pump and the electric proportional pressure reducing valve, the second electromagnetic directional valve and the pilot control emergency energy accumulator are communicated in sequence; the pilot control constant delivery pump, the third electromagnetic directional valve, the second overflow valve and the oil tank are communicated in sequence; the pilot-controlled emergency accumulator is adapted to communicate with the oil tank.

The pilot control constant delivery pump is characterized by further comprising a third overflow valve and a fourth electromagnetic directional valve communicated with the third overflow valve, and a pipeline between the pilot control constant delivery pump and the electric proportional pressure reducing valve, the third overflow valve and the oil tank are communicated in sequence.

Further, still include bolt hydro-cylinder fuel feeding constant delivery pump, fifth electromagnetic directional valve and bolt hydro-cylinder, the oil tank bolt hydro-cylinder fuel feeding constant delivery pump fifth electromagnetic directional valve with the bolt hydro-cylinder communicates in proper order, the oil return opening of fifth electromagnetic directional valve with the oil tank intercommunication.

Further, still include the emergent fuel feeding energy storage ware of bolt, fifth solenoid directional valve with pipeline between the bolt hydro-cylinder fuel feeding constant delivery pump with the emergent fuel feeding energy storage ware intercommunication of bolt, just the emergent fuel feeding energy storage ware of bolt be suitable for with the oil tank intercommunication.

The plug pin oil cylinder oil supply constant delivery pump is communicated with a pipeline between the fifth electromagnetic reversing valve and the plug pin oil cylinder oil supply constant delivery pump, and the fourth overflow valve and the oil tank are sequentially communicated.

Furthermore, an oil return port of the first electromagnetic directional valve is communicated with the oil tank through an oil return pipeline.

Drawings

Fig. 1 is a schematic block diagram of a structure of an oil cylinder lifting system in an embodiment of the present invention;

fig. 2 is an electrical schematic diagram of the cylinder lifting system in the embodiment of the present invention.

Description of reference numerals:

1-an oil tank; 2-an electrically proportional variable pump assembly; 3-a first electromagnetic directional valve; 4-a balancing valve; 5-guiding and controlling a fixed-quantity pump; 6-electric proportional pressure reducing valve; 7-jacking oil cylinders; 8-oil return pipeline; 9-a first pressure relief valve; 10-a first overflow valve; 11-a throttle valve; 12-a switching valve; 13-pilot control emergency accumulator; 14-a second electromagnetic directional valve; 15-a third electromagnetic directional valve; 16-a second overflow valve; 19-a third relief valve; 20-a fourth electromagnetic directional valve; 21-bolt oil cylinder oil supply constant delivery pump; 22-a fifth electromagnetic directional valve; 23-a latch oil cylinder; 24-bolt emergency oil supply accumulator; 25-a fourth overflow valve; 26-a sixth electromagnetic directional valve; 27-a first pressure sensor; 28-a second pressure sensor; 29-oil drainage pipeline; 201-electric proportional variable pump; 202-electric proportional displacement control valve; 401-a first counter-balance valve; 402-a second counter-balance valve; 601-a first electro proportional pressure reducing valve; 602-a second electro-proportional pressure reducing valve; 701-a rodless cavity oil port; 702-a rod cavity oil port; 2301-a first latch cylinder; 2302-a second latch cylinder; 2701-first outlet sensor; 2702 — second exit sensor; 2801-a first inlet sensor; 2802-second inlet sensor.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

It is noted that the terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.

Referring to fig. 1 and 2, the utility model provides an oil cylinder lifting system, which comprises an oil tank 1, an electric proportional variable pump assembly 2, a first electromagnetic directional valve 3, a balance valve 4, a pilot control constant delivery pump 5, an electric proportional pressure reducing valve 6, a jacking oil cylinder 7, a first pressure sensor 27 and a second pressure sensor 28; the oil tank 1, the electric proportional variable pump assembly 2, the first electromagnetic directional valve 3 and the jacking oil cylinder 7 are sequentially communicated, and the balance valve 4 is communicated with both the jacking oil cylinder 7 and the first electromagnetic directional valve 3; the oil tank 1, the pilot control constant delivery pump 5 and the electric proportional pressure reducing valve 6 are sequentially communicated, and the electric proportional pressure reducing valve 6 is communicated with a pilot control port of the balance valve 4; the first pressure sensor 27 is adapted to be disposed at a communication line between the first electromagnetic directional valve 3 and the balance valve 4, and the second pressure sensor 28 is adapted to be disposed at a communication line between the lift cylinder 7 and the balance valve 4.

In a related hydraulic cylinder lifting system, in order to enable a lifting system platform to be lifted and lowered, an oil pressure control reverse balance valve is generally adopted for realizing, when the platform is lifted and lowered, the control oil pressure of the system can change along with the pressure change of a platform jacking oil cylinder, the opening of the reverse balance valve is unstable due to the change of the oil pressure, and further, the descending speed is fast and slow, and the shaking is generated.

The embodiment of the utility model provides an in, electric proportional variable pump subassembly 2 is connected to oil tank 1 of hydro-cylinder operating system, with the hydraulic oil that output control jacking cylinder 7 goes up and down, refer to fig. 1 and 2, electric proportional variable pump subassembly 2 can include electric proportional variable pump subassembly 2 and the electric proportional displacement control valve 202 of being connected with electric proportional variable pump 201, carry out displacement control to electric proportional variable pump 201 through electric proportional displacement control valve 202, wherein electric proportional displacement control valve 202 can be equipped with solenoid, with this can carry out communication control, in this embodiment, the hydraulic oil of electric proportional variable pump subassembly 2 output can loop through the check valve, the filter, first electromagnetic directional valve 3, then flow in jacking cylinder 7, set up the check valve in order to avoid the hydraulic oil backward flow, set up the filter in order to filter hydraulic oil.

Wherein, a balance valve 4 is provided, the balance valve 4 is communicated with the first electromagnetic directional valve 3 and the jacking cylinder 7 for balancing the pressure difference of the hydraulic oil, referring to fig. 1, in an alternative embodiment of this embodiment, the first electromagnetic directional valve 3, the balance valve 4 and the jacking cylinder 7 are communicated in sequence, so that the hydraulic oil can finally flow into the jacking cylinder 7 through the first electromagnetic directional valve 3 and the balance valve 4 in sequence, or the hydraulic oil flowing out from the jacking cylinder 7 can flow to the first electromagnetic directional valve 3 through the regulated balance valve 4, or referring to fig. 2, in another embodiment, a one-way pipeline is included, a one-way valve is arranged on the one-way pipeline, the first electromagnetic directional valve 3 is connected with the jacking cylinder 7 through the one-way pipeline, so that the hydraulic oil can flow into the jacking cylinder 7 from the first electromagnetic directional valve 3, the balance valve 4 is connected with the one-way pipeline in parallel, and is communicated with the first electromagnetic directional valve 3 and the jacking cylinder 7, therefore, the hydraulic oil flowing out of the jacking oil cylinder 7 can flow to the first electromagnetic directional valve 3 through the regulated balance valve 4.

The cylinder lifting system further comprises a pilot-controlled constant delivery pump 5 connected to the oil tank 1 for pilot control, the hydraulic oil output from the pilot-controlled constant delivery pump 5 passes through a one-way valve, a filter and an electro-proportional pressure reducing valve 6 in sequence, so that the electro-proportional pressure reducing valve 6 finally outputs proportional control oil to a pilot control port of the balance valve 4, referring to fig. 2, the balance valve 4 generally has a plurality of oil ports, in this embodiment, two oil ports for communicating the hydraulic oil and the pilot control port are provided, when the hydraulic oil flows into the pilot control port, the balance valve 4 is controlled, so as to control the hydraulic oil flow of the other two oil ports of the balance valve based on the control of the pilot control port, in this embodiment, when the balance valve 4 is controlled, for example, the hydraulic control oil with the proportion adjusted by the electro-proportional pressure reducing valve 6 is output, so that the balance valve 4 performs a proportional, the hydraulic oil from the lift-up cylinder 7 can flow in the opposite direction through the proportional open balancing valve 4.

The cylinder lifting system comprises a first pressure sensor 27 and a second pressure sensor 28, so that the pressure value of the hydraulic oil in the pipeline between the first electromagnetic directional valve 3 and the balance valve 4 and the pressure value of the hydraulic oil in the pipeline between the jacking cylinder 7 and the balance valve 4 can be detected through the first pressure sensor 27 and the second pressure sensor 28, namely the pressure values of two hydraulic oil ports of the balance valve 4 are detected in real time, and based on the detection, the telescopic operation condition of the jacking cylinder 7 can be accurately determined, it can be understood that when the two pressure values are compared, if the difference between the two pressure values is not changed greatly, the jacking cylinder 7 is more stable in telescopic operation and smaller in jitter, if the difference between the two pressure values is smaller, namely the telescopic speed of the jacking cylinder 7 is faster, correspondingly, the control of the electric proportional displacement control valve 202 of the electric proportional variable displacement pump assembly 2 can be more conveniently controlled according to the comparison condition of the two pressure values, thereby ensure jacking cylinder 7 steadily to stretch out or retract, guarantee here that corresponding ground carries out steady lift, avoid the shake, perhaps, according to the contrast condition of two pressure values, thereby can more conveniently control electric proportional pressure reducing valve 6, if when the difference of two pressure values is great, reduce the pressure value of electric proportional pressure reducing valve 6 output hydraulic oil, increase balanced valve 4 and open the guide pressure, realize jacking cylinder 7 and stretch out or the improvement of withdrawal speed with this, with this avoid the platform operation difficulty to appear, correspondingly, also can slow down the functioning speed of platform, with this operation reasonable regulation and control that can be to the platform.

Wherein, the oil paths where the first pressure sensor 27 and the second pressure sensor 28 are located are provided with switch valves to control the conduction or the closing of the pressure sensors so as to detect the pressure at a proper time.

In this embodiment, the first electromagnetic directional valve 3 may be a three-position four-way electromagnetic directional valve, and an electromagnetic coil is disposed thereon to control output of hydraulic oil, wherein the first electromagnetic directional valve 3 includes a first working port and a second working port, that is, the port a and the port b of the first electromagnetic directional valve 3 in fig. 2, in this embodiment, when the jacking cylinder 7 needs to be extended or retracted, hydraulic oil needs to be input to a rod cavity or a rodless cavity of the jacking cylinder 7, and the working port refers to an oil port for inputting hydraulic oil to the rod cavity and the rodless cavity, respectively, by controlling the first electromagnetic directional valve 3, oil output of the first working port or the second working port is realized, and thus control over the rod cavity or the rodless cavity is finally realized, for example, hydraulic oil is output to the rodless cavity 701 through the first working port, so that hydraulic oil is introduced into the rodless cavity, the piston rod is controlled to extend, meanwhile, the rod cavity is subjected to oil outlet through the rod cavity oil port 702, the hydraulic oil flows to the second working port, and finally the hydraulic oil is led into the oil tank 1 through the oil return port of the first electromagnetic directional valve 3, so as to realize circulation of the hydraulic oil in the whole oil path, the balance valve 4 comprises a first balance valve 401 and a second balance valve 402, the first balance valve 401 is communicated with the first working port and the rodless cavity oil port 701 of the jacking oil cylinder 7, the second balance valve 402 is communicated with the second working port and the rod cavity oil port 702 of the jacking oil cylinder 7, so that the first electromagnetic directional valve 3 adjusts opening and closing of the first working port and the second working port, the conduction of the hydraulic oil of the rodless cavity oil port 701 and the rod cavity oil port 702 of the jacking oil cylinder 7 is correspondingly controlled, namely, the extension and retraction of the jacking oil cylinder 7 are respectively controlled, and when the rodless cavity oil port 701 is conducted, leading-in hydraulic oil in the no pole intracavity, no piston rod in the no pole intracavity, the piston rod stretches out this moment, when having pole chamber hydraulic fluid port 702 to switch on, there is leading-in hydraulic oil in the pole chamber, there is the cavity of pole chamber for having the piston rod, the piston rod withdrawal this moment, wherein, refer to fig. 2, can set up one-way line respectively, in order to carry out switching on of first working port and second working port to no pole chamber hydraulic fluid port 701 and having pole chamber hydraulic fluid port 702, wherein, first balanced valve 401 and second balanced valve 402 are equallyd divide and are do not parallelly connected with the one-way line who corresponds, with this switch on with the working port of jacking cylinder 7 and first electromagnetic directional valve 3, thereby realize the independent control that jacking cylinder 7 steadily stretches out and retracts.

Correspondingly, the first pressure sensor 27 includes a first outlet sensor 2701 and a second outlet sensor 2702, and the second pressure sensor 28 includes a first inlet sensor 2801 and a second inlet sensor 2802, so that the first outlet sensor 2701 and the first inlet sensor 2801 respectively detect pressure values at two ends of the first balance valve 401, and the second outlet sensor 2702 and the second inlet sensor 2802 respectively detect pressure values at two ends of the second balance valve 402, so that the electric proportional displacement control valve 202 of the electric proportional variable pump assembly 2 is controlled under the condition that the jacking cylinder 7 extends or retracts respectively, and the extension and retraction of the jacking cylinder 7 are more stable.

In an embodiment, referring to fig. 1 and 2 corresponding to the first and second balance valves 401 and 402, the electro-proportional pressure reducing valve 6 may include a first electro-proportional pressure reducing valve 601 and a second electro-proportional pressure reducing valve 602, where the pilot control ports of the pilot-controlled constant delivery pump 5, the first electro-proportional pressure reducing valve 601 and the first balance valve 401 are sequentially communicated, and the pilot control ports of the pilot-controlled constant delivery pump 5, the second electro-proportional pressure reducing valve 602 and the second balance valve 402 are sequentially communicated, so as to control the first balance valve 401 and the second balance valve 402, respectively, that when the lift-up cylinder 7 is controlled to retract, the first electro-proportional pressure reducing valve 601 outputs a proportional control oil to the first balance valve 401 to implement a proportional opening, and when the lift-up cylinder 7 is controlled to extend, the second electro-proportional pressure reducing valve 602 outputs a proportional control oil to the second balance valve 402 to implement a proportional opening.

An oil return port of the first electromagnetic directional valve 3, i.e. the port t in fig. 2, may be communicated with the oil tank 1, thereby realizing a discharge function of redundant hydraulic oil, thereby avoiding damage to the internal seal of the oil cylinder, wherein, corresponding to the first balance valve 401 being communicated with the rodless cavity oil port 701 of the jacking oil cylinder 7 and the first working port of the first electromagnetic directional valve 3, the second balance valve 402 being communicated with the rod cavity oil port 702 of the jacking oil cylinder 7 and the second working port of the first electromagnetic directional valve 3, the hydraulic oil flowing out of the jacking oil cylinder 7 may respectively flow into the two working ports of the first electromagnetic directional valve 3 through the first balance valve 401 and the second balance valve 402, thereby flowing back into the oil tank 1 through the oil return port t of the first electromagnetic directional valve 3.

In this embodiment, the oil cylinder lifting system includes the oil return pipeline 8 to each components and parts carries out the oil return intercommunication in being arranged in supplying the system, circulate in leading-in oil tank 1 with the oil return of hydraulic oil, wherein can set up the filter on the oil return pipeline 8, in order to filter hydraulic oil, can set up the cooler, cool off the hydraulic oil of backward flow, can set up the check valve, in order to form the one-way conduction of returning oil pipeline 8.

Wherein, the oil return port t of the first electromagnetic directional valve 3 is connected with the oil return pipeline 8 through a pipeline.

In an optional embodiment of the utility model, still include first relief valve 9 and first overflow valve 10, pilot control constant delivery pump 5 first relief valve 9 with there is pole chamber hydraulic fluid port 702 to communicate in proper order, just pilot control constant delivery pump 5 first relief valve 9 first overflow valve 10 with oil tank 1 communicates in proper order.

Referring to fig. 2, in this embodiment, the pilot-controlled constant delivery pump 5, the first pressure reducing valve 9 and the rod cavity oil port 702 are sequentially communicated, and are connected to the oil tank 1 based on the pilot-controlled constant delivery pump 5, so that the hydraulic oil in the oil tank 1 can sequentially pass through the pilot-controlled constant delivery pump 5 and the first pressure reducing valve 9 and then flows to the rod cavity oil port 702 of the jacking oil cylinder 7, a check valve may be disposed on a pipeline between the first pressure reducing valve 9 and the rod cavity oil port 702 to implement one-way conduction, and the oil in the rod cavity oil port 702 is prevented from flowing back to the first pressure reducing valve 9; and the pilot control constant delivery pump 5, the first reducing valve 9, the first overflow valve 10 and the oil tank 1 are sequentially communicated, so that the hydraulic oil output from the pilot control constant delivery pump 5 can flow back to the oil tank 1 through the first reducing valve 9 and the first overflow valve 10, and specifically, the first overflow valve 10 is connected with the oil return pipeline 8 through a pipeline to return oil.

After the lifting system is stood for a long time, air is separated out from oil liquid in a rod cavity of the jacking oil cylinder 7 under the action of gravity, so that the internal liquid level is lowered, the separated air can cause corrosion of the inner wall of the oil cylinder, and meanwhile, due to the existence of the oil liquid in the oil cylinder, cavitation corrosion to the inner wall of the oil cylinder is caused to a certain degree due to oil pressure change in the operation process of the oil cylinder.

In this embodiment, the pilot-controlled constant delivery pump 5 outputs hydraulic oil to the first pressure-reducing valve 9, a part of the hydraulic oil flowing out of the first pressure-reducing valve 9 can flow to the first overflow valve 10, and then flows back to the oil tank through the oil return line 8, and another part of the hydraulic oil flowing out of the first pressure-reducing valve 9 flows to the rod cavity oil port 702 for oil supplement, because of the effect of the first overflow valve 10, the hydraulic oil for oil supplement to the rod cavity oil port 702 has a certain pressure so as to realize pressure exhaust to the rod cavity of the jacking oil cylinder 7, thereby avoiding causing the main pressure-bearing cavity of the jacking oil cylinder 7 to suppress pressure, and further enabling the jacking oil cylinder 7 to operate stably, i.e., the platform can be lifted stably and safely.

In an optional embodiment of the utility model, still include choke valve 11 and ooff valve 12, rodless chamber hydraulic fluid port 701 choke valve 11 ooff valve 12 with there is pole chamber hydraulic fluid port 702 to communicate in proper order, there is pole chamber hydraulic fluid port 702 with pipeline between ooff valve 12 first overflow valve 10 with oil tank 1 communicates in proper order.

In the related art, there may occur a system power failure without a backup power supply, so that the emergency control of the lift cylinder 7 is impossible, and it is difficult to realize the emergency lowering operation of the platform and the corresponding emergency oil return operation.

In this embodiment, the rodless chamber oil port 701, the throttle valve 11, the switch valve 12, and the rod chamber oil port 702 are sequentially connected through a pipeline, so as to be suitable for communication with each other, the opening or closing of the on-off valve 12 ensures whether the rodless chamber oil port 701 and the rod chamber oil port 702 are communicated, in a normal state, the flow path is cut off by the on-off valve 12, and when the power is off and the backup power is not supplied, the rodless chamber port 701 and the rod chamber port 702 are connected by controlling the on-off valve 12, so that a part of the hydraulic oil flowing out of the rodless cavity oil port 701 flows to the rod cavity oil port 702 to realize the oil supplement of the rod cavity, and the other part of the hydraulic oil flows to the first overflow valve 10, and returns to the oil tank 1 through an oil return pipeline 8 to perform oil return so as to finish the emergency lowering of the jacking oil cylinder 7, wherein the throttle valve 11 is used for adjusting the flow of hydraulic oil, thereby adjusting the lower speed of the emergency lowering to make the speed of the emergency lowering more reasonable.

In an optional embodiment of the present invention, the emergency energy storage device further includes a pilot-controlled emergency energy storage device 13, a second electromagnetic directional valve 14, a third electromagnetic directional valve 15 and a second overflow valve 16, and a pipeline between the pilot-controlled constant displacement pump 5 and the electro-proportional pressure reducing valve 6, the second electromagnetic directional valve 14 and the pilot-controlled emergency energy storage device 13 are sequentially communicated; the pilot control constant delivery pump 5, the third electromagnetic directional valve 15, the second overflow valve 16 and the oil tank 1 are communicated in sequence; the pilot-controlled emergency accumulator 13 is adapted to communicate with the tank 1.

In this embodiment, a pilot-controlled emergency accumulator 13 is provided to store energy and provide an oil source in an emergency, wherein a pipeline between the pilot-controlled constant delivery pump 5 and the electric proportional pressure reducing valve 6, the second electromagnetic directional valve 14 and the pilot-controlled emergency accumulator 13 are sequentially communicated, so that hydraulic oil flowing out from the pilot-controlled constant delivery pump 5 can flow to the pilot-controlled emergency accumulator 13 through the second electromagnetic directional valve 14 to perform charging and energy storage, after the charging and energy storage is completed, the hydraulic oil of the pilot-controlled constant delivery pump 5 can flow back to the oil tank 1 through the third electromagnetic directional valve 15, the second overflow valve 16 and the oil return pipeline 8 in sequence, and the pilot-controlled emergency accumulator 13 can be communicated with the oil tank 1, so that the hydraulic oil of the pilot-controlled emergency accumulator 13 can flow back to the oil tank 1, specifically, a switch valve is provided on the pipeline between the pilot-controlled emergency accumulator 13 and the oil return pipeline 8, the oil return of the emergency accumulator 13 is pilot-controlled by opening and closing the on-off valve.

The utility model discloses an optional embodiment, still include third overflow valve 19 and with the fourth electromagnetic directional valve 20 that third overflow valve 19 communicates, pilot control constant delivery pump 5 with pipeline between the electric proportional pressure reducing valve 6 third overflow valve 19 with oil tank 1 communicates in proper order.

In this embodiment, a pipeline between the pilot-controlled constant delivery pump 5 and the electro-proportional pressure reducing valve 6 is communicated with a third overflow valve 19, and the third overflow valve 19 is connected to a fourth electromagnetic directional valve 20, so that the third overflow valve 19 can be controlled by controlling the fourth electromagnetic directional valve 20, thereby realizing the outward output of the hydraulic oil of the pilot-controlled constant delivery pump 5, wherein the pipeline between the pilot-controlled constant delivery pump 5 and the electro-proportional pressure reducing valve 6, the third overflow valve 19 and the oil tank 1 are sequentially communicated, specifically, the pipeline between the pilot-controlled constant delivery pump 5 and the electro-proportional pressure reducing valve 6, the third overflow valve 19, the oil return pipeline 8 and the oil tank 1 are sequentially communicated, thereby facilitating the oil return of the pilot-controlled constant delivery pump 5 after the work is completed.

Wherein the fourth electromagnetic directional valve 20 may be a pilot electromagnetic directional valve.

The utility model discloses an optional embodiment, still include bolt hydro-cylinder fuel feeding constant delivery pump 21, fifth electromagnetic directional valve 22 and bolt hydro-cylinder 23, oil tank 1 bolt hydro-cylinder fuel feeding constant delivery pump 21 fifth electromagnetic directional valve 22 with bolt hydro-cylinder 23 communicates in proper order, the oil return opening of fifth electromagnetic directional valve 22 with oil tank 1 communicates.

In this embodiment, the latch oil cylinder 23 includes a first latch oil cylinder 2301 and a second latch oil cylinder 2302, and the fifth electromagnetic directional valve 22 also corresponds to the first latch oil cylinder 2301 and the second latch oil cylinder 2302 to be two, in this embodiment, a two-position four-way electromagnetic directional valve is adopted, so that the hydraulic oil output by the latch oil cylinder oil supply quantitative pump 21 flows to the first latch oil cylinder 2301 or the second latch oil cylinder 2302 through the fifth electromagnetic directional valve 22 to control the latch oil cylinder, so as to realize the removal of the latch of the movable ring beam.

In an optional embodiment of the present invention, the emergency oil supply energy accumulator 24 for the plug pin is further included, the fifth electromagnetic directional valve 22 and the pipeline between the oil supply constant delivery pumps 21 for the plug pin oil cylinder communicate with the emergency oil supply energy accumulator 24 for the plug pin, and the emergency oil supply energy accumulator 24 for the plug pin is adapted to communicate with the oil tank 1.

In this embodiment, the bolt emergency oil supply accumulator 24 is provided to store energy and provide an oil source in an emergency, wherein the hydraulic oil flowing out from the bolt oil cylinder oil supply constant delivery pump 21 can flow to the bolt emergency oil supply accumulator 24, a switch valve can be provided on a pipeline between the bolt oil cylinder oil supply constant delivery pump 21 and the bolt emergency oil supply accumulator 24 to control energy storage, and the switch valve can be connected to the oil return pipeline 8 through a pipeline to control oil return of the bolt emergency oil supply accumulator 24.

In an optional embodiment of the present invention, the oil tank further comprises a fourth overflow valve 25 and a sixth electromagnetic directional valve 26 communicated with the fourth overflow valve 25, wherein the pipeline between the latch oil cylinder oil supply constant delivery pump 21 and the fifth electromagnetic directional valve 22, the fourth overflow valve 25 and the oil tank 1 are sequentially communicated.

In this embodiment, the fourth overflow valve 25 can be controlled by controlling the sixth electromagnetic directional valve 26, so that the hydraulic oil of the latch oil cylinder oil supply constant delivery pump 21 is output outwards, wherein a pipeline between the latch oil cylinder oil supply constant delivery pump 21 and the fifth electromagnetic directional valve 22, the fourth overflow valve 25 and the oil tank 1 are sequentially communicated, so that oil return of the latch oil cylinder oil supply constant delivery pump 21 after the work is completed is facilitated.

Wherein the sixth electromagnetic directional valve 26 may be a pilot electromagnetic directional valve.

In an optional embodiment of the present invention, the cylinder lifting system further comprises an oil drainage pipeline 29, and the oil drainage pipeline 29 connects the oil tank 1 for processing the leakage oil of the hydraulic oil in the system component.

Specifically, the oil drainage pipeline 29 is communicated with the fourth electromagnetic directional valve 20, the sixth electromagnetic directional valve 26 and the electric proportional pressure reducing valve 6 through pipelines, so that the leaked oil is conveniently treated, and flows to the oil tank after being converged.

The utility model discloses an optional embodiment, still include level sensor, heater, level gauge, air cleaner and oil drain switch, wherein level sensor is used for detecting the liquid level of hydraulic oil in the oil tank 1 and sends corresponding level signal, and the heater is used for heating hydraulic oil in the oil tank 1, and the air cleaner is used for filtering the air that gets into oil tank 1, and the oil drain switch is used for deriving the hydraulic oil in the oil tank 1, and the level gauge is used for instructing the liquid level of hydraulic oil in the oil tank 1.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims (10)

1. An oil cylinder lifting system is characterized by comprising an oil tank (1), an electric proportional variable pump assembly (2), a first electromagnetic directional valve (3), a balance valve (4), a pilot control constant delivery pump (5), an electric proportional pressure reducing valve (6), a jacking oil cylinder (7), a first pressure sensor (27) and a second pressure sensor (28); the oil tank (1), the electric proportional variable pump assembly (2), the first electromagnetic directional valve (3) and the jacking oil cylinder (7) are sequentially communicated, and the balance valve (4) is communicated with the jacking oil cylinder (7) and the first electromagnetic directional valve (3); the oil tank (1), the pilot control constant delivery pump (5) and the electric proportional pressure reducing valve (6) are sequentially communicated, and the electric proportional pressure reducing valve (6) is communicated with a pilot control port of the balance valve (4); the first pressure sensor (27) is suitable for being arranged at a communication pipeline between the first electromagnetic reversing valve (3) and the balance valve (4), and the second pressure sensor (28) is suitable for being arranged at a communication pipeline between the jacking oil cylinder (7) and the balance valve (4).

2. The cylinder lift system according to claim 1, characterized in that the first solenoid directional valve (3) comprises a first working port and a second working port, the balance valve (4) comprises a first balance valve (401) and a second balance valve (402), the first balance valve (401) is communicated with both the first working port and the rodless cavity oil port (701) of the lift cylinder (7), and the second balance valve (402) is communicated with both the second working port and the rodless cavity oil port (702) of the lift cylinder (7).

3. The oil cylinder lifting system according to claim 2, further comprising a first pressure reducing valve (9) and a first overflow valve (10), wherein the pilot-controlled constant delivery pump (5), the first pressure reducing valve (9) and the rod cavity oil port (702) are sequentially communicated, and the pilot-controlled constant delivery pump (5), the first pressure reducing valve (9), the first overflow valve (10) and the oil tank (1) are sequentially communicated.

4. The cylinder lifting system according to claim 3, further comprising a throttle valve (11) and a switch valve (12), wherein the rodless chamber oil port (701), the throttle valve (11), the switch valve (12) and the rod chamber oil port (702) are sequentially communicated, and a pipeline between the rod chamber oil port (702) and the switch valve (12), the first overflow valve (10) and the oil tank (1) are sequentially communicated.

5. The cylinder lifting system according to any one of claims 1 to 4, characterized by further comprising a pilot-controlled emergency accumulator (13), a second electromagnetic directional valve (14), a third electromagnetic directional valve (15) and a second overflow valve (16), wherein a pipeline between the pilot-controlled constant displacement pump (5) and the electro-proportional pressure reducing valve (6), the second electromagnetic directional valve (14) and the pilot-controlled emergency accumulator (13) are communicated in sequence; the pilot control constant delivery pump (5), the third electromagnetic directional valve (15), the second overflow valve (16) and the oil tank (1) are communicated in sequence; the pilot-controlled emergency accumulator (13) is adapted to communicate with the tank (1).

6. The cylinder lifting system according to any one of claims 1 to 4, characterized by further comprising a third overflow valve (19) and a fourth electromagnetic directional valve (20) communicated with the third overflow valve (19), wherein a pipeline between the pilot control constant delivery pump (5) and the electro-proportional pressure reducing valve (6), the third overflow valve (19) and the oil tank (1) are communicated in sequence.

7. The oil cylinder lifting system according to any one of claims 1 to 4, further comprising a bolt oil cylinder oil supply constant delivery pump (21), a fifth electromagnetic directional valve (22) and a bolt oil cylinder (23), wherein the oil tank (1), the bolt oil cylinder oil supply constant delivery pump (21), the fifth electromagnetic directional valve (22) and the bolt oil cylinder (23) are sequentially communicated, and an oil return port of the fifth electromagnetic directional valve (22) is communicated with the oil tank (1).

8. The cylinder lifting system according to claim 7, further comprising a latch emergency oil supply accumulator (24), wherein a pipeline between the fifth electromagnetic directional valve (22) and the latch cylinder oil supply constant delivery pump (21) is in communication with the latch emergency oil supply accumulator (24), and the latch emergency oil supply accumulator (24) is adapted to be in communication with the oil tank (1).

9. The cylinder lifting system according to claim 7, further comprising a fourth spill valve (25) and a sixth electromagnetic directional valve (26) in communication with the fourth spill valve (25), wherein a pipeline between the latch cylinder oil supply constant delivery pump (21) and the fifth electromagnetic directional valve (22), the fourth spill valve (25) and the oil tank (1) are in communication in sequence.

10. Cylinder lifting system according to one of claims 1 to 4, characterised in that the return opening of the first solenoid directional valve (3) communicates with the tank (1) via a return line (8).

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