CN212250653U - Supercharging device, hydraulic system and engineering mechanical equipment - Google Patents

Abstract

A supercharging device, a hydraulic system and engineering mechanical equipment are provided; the supercharging device includes: the device comprises a pressurization reversing valve, a backpressure mechanism connected with the pressurization reversing valve, a pressure cylinder connected with the backpressure mechanism and a confluence mechanism connected with the pressure cylinder; the pressure-boosting reversing valve is provided with a first oil inlet, a first working oil port and a second working oil port; the back pressure mechanism comprises a first back pressure valve group communicated with the first working oil port and a second back pressure valve group communicated with the second working oil port; a first high-pressure rodless cavity, a first low-pressure rod cavity, a second low-pressure rod cavity and a second high-pressure rodless cavity are sequentially arranged in the pressure cylinder; the confluence mechanism is respectively communicated to the first high-pressure rodless cavity and the second high-pressure rodless cavity. Through exporting hydraulic oil from first working fluid port or second working fluid port, when hydraulic oil gets into first low pressure and has the pole chamber or second low pressure and have the pole chamber, second high pressure does not have pole chamber or first high pressure does not have the pole chamber and exports high-pressure hydraulic oil through the mechanism that converges to increase output load power.

Description

Supercharging device, hydraulic system and engineering mechanical equipment

Technical Field

The utility model relates to an engineering hydraulic technology especially relates to a supercharging device, hydraulic system and engineering machine tool equipment.

Background

The hydraulic system has the characteristics of large power-to-volume ratio, easiness in realizing overload protection, flexibility in arrangement and the like, and is widely applied to the field of engineering machinery and die-casting equipment.

In the case of a fixed actuator, the pressure of the hydraulic system is determined by the load of the actuator, i.e., when the load of the hydraulic actuator is small, the pressure of the hydraulic system is also small, and when the load of the hydraulic actuator is increased, the pressure of the hydraulic system is increased accordingly. In the case of a limited installation space, the hydraulic actuators are already dimensioned, and if an increased output load force is required, it is only possible to increase the pressure of the hydraulic system. However, if a high-power device such as an ultra-high pressure pump and a hydraulic control element are directly adopted, not only is the system cost increased, but also the selection of the relevant hydraulic element is limited.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for a booster device, a hydraulic system, and a construction machine that can increase output load force while avoiding the need to use a powerful power plant.

A supercharging arrangement, comprising: the device comprises a pressurization reversing valve, a backpressure mechanism connected with the pressurization reversing valve, a pressurization cylinder connected with the backpressure mechanism and a confluence mechanism connected with the pressurization cylinder; the pressure-boosting reversing valve is provided with a first oil inlet, a first working oil port and a second working oil port; the back pressure mechanism comprises a first back pressure valve group communicated with the first working oil port and a second back pressure valve group communicated with the second working oil port; a first high-pressure rodless cavity, a first low-pressure rod cavity, a second low-pressure rod cavity and a second high-pressure rodless cavity are sequentially arranged in the booster cylinder; an output port of the first back pressure valve group is communicated to the first low-pressure rod cavity; an output port of the second back pressure valve group is communicated to the second low-pressure rod cavity; a first check valve is connected between the output port of the first back pressure valve group and the second high-pressure rodless cavity; a second check valve is connected between the output port of the second back pressure valve group and the first high-pressure rodless cavity; the confluence mechanism is communicated to the first high-pressure rodless cavity and the second high-pressure rodless cavity respectively.

According to the supercharging device, hydraulic oil is output from the first working oil port or the second working oil port, when the hydraulic oil enters the first low-pressure rod cavity or the second low-pressure rod cavity, the piston action areas of the first low-pressure rod cavity and the second low-pressure rod cavity are larger than the piston action areas of the second high-pressure rodless cavity and the first high-pressure rodless cavity, so that the second high-pressure rodless cavity or the first high-pressure rodless cavity outputs high-pressure hydraulic oil through the confluence mechanism, and therefore the output load force is increased.

In one embodiment, the booster cylinder comprises a main cylinder body, a first side cylinder body connected with one end of the main cylinder body, a second side cylinder body connected with one end of the main cylinder body and a piston piece; the piston member includes a master piston block disposed in the master cylinder, a first slave piston block disposed in the first side cylinder, and a second slave piston block disposed in the second side cylinder; the master piston block, the first slave piston block and the second slave piston block are arranged in a linkage manner; the main cylinder body forms the first low-pressure rod cavity and the second low-pressure rod cavity under the separation of the main piston block; the first side cylinder body forms the first high-pressure rodless cavity and the first high-pressure rod cavity under the separation of the first auxiliary piston block; the second side cylinder body forms the second high-pressure rodless cavity and a second high-pressure rod cavity under the separation of the second slave piston block; the output port of the first back pressure valve group is also communicated to the second high-pressure rod cavity; an output port of the second back pressure valve group is communicated to the first high-pressure rod cavity; thereby, the thrust force to the piston member can be increased, and the output load force can be further increased.

In one embodiment, the first back pressure valve group comprises a third check valve and a first overflow valve which are arranged in parallel; therefore, when the first low-pressure rod cavity is compressed, hydraulic oil flows back through the first back pressure valve component.

In one embodiment, the confluence mechanism is provided with a first confluence inlet communicated with the second high-pressure rodless cavity; the confluence mechanism is also provided with a second confluence inlet communicated with the first high-pressure rodless cavity; the confluence mechanism is also provided with a flow outlet; the confluence mechanism comprises a first cartridge valve communicated with the first confluence inlet and a second cartridge valve communicated with the second confluence inlet; one output port of the first cartridge valve is communicated to the flow outlet, and the other output port of the first cartridge valve is communicated to the control end of the second cartridge valve; one output port of the second cartridge valve is communicated to the flow outlet, and the other output port of the second cartridge valve is communicated to the control end of the first cartridge valve; thereby avoiding a drop in the output load force of the joining mechanism.

A hydraulic system comprises a supercharging device, a driving reversing valve connected with the supercharging device, an actuating mechanism connected with the driving reversing valve, an oil inlet oil way communicated with a first oil inlet, an oil pump for pumping hydraulic oil to the first oil inlet oil way and an oil outlet oil way connected with the driving reversing valve; the driving reversing valve is provided with a second oil inlet communicated with the outflow port of the confluence mechanism; the drive reversing valve is also provided with a second oil return port communicated with the oil outlet oil way; the driving reversing valve is also provided with a third working oil port communicated with the first action cavity of the actuating mechanism; the driving reversing valve is also provided with a fourth working oil port communicated with a second working cavity of the actuating mechanism; thereby realizing the action of the executing mechanism in different directions.

In one embodiment, the booster reversing valve is a three-position four-way valve; the middle position function of the pressurization reversing valve is H-shaped; therefore, the moving direction of the piston piece in the pressurizing cylinder can be switched, and the pressurizing device can continuously output high-pressure hydraulic oil.

In one embodiment, the hydraulic system further comprises a second overflow valve and an oil tank, wherein the second overflow valve is connected between the oil inlet oil way and the oil outlet oil way, and the oil tank is used for storing hydraulic oil; the inlet of the oil pump extends to the oil tank through a pipeline; one end of the oil outlet oil way extends into the oil tank; thereby avoiding the damage of the booster reversing valve caused by overhigh oil pressure of the oil pump.

In one embodiment, the system further comprises a hydraulic lock; a third working oil port of the driving reversing valve is communicated with a first acting cavity of the actuating mechanism through the hydraulic lock; the oil outlet oil path is communicated with a second acting cavity of the actuating mechanism through the hydraulic lock; therefore, after the oil pump stops outputting, the hydraulic oil in the first acting cavity or the second acting cavity is prevented from actively flowing backwards, and the telescopic length or the angle state of the actuating mechanism is kept.

A work machine, comprising: the main bearing platform and at least one hydraulic system; the hydraulic system is arranged on the main carrying platform.

In one embodiment, the system further comprises a telescopic mechanism connected with the main carrier, the telescopic mechanism is driven by the hydraulic system, and in the hydraulic system for driving the telescopic mechanism, the actuating mechanism is an oil cylinder; and/or the presence of a catalyst in the reaction mixture,

the engineering mechanical equipment further comprises a swinging mechanism connected with the main carrying platform, the swinging mechanism is driven by the hydraulic system, and in the hydraulic system for driving the swinging mechanism, the executing mechanism is an oil motor.

Drawings

Fig. 1 is a schematic structural diagram of a hydraulic system according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the supercharging assembly of FIG. 1;

fig. 3 is a schematic structural diagram of an engineering mechanical apparatus according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a construction machine according to a second embodiment of the present invention.

The corresponding relation between each reference number and each meaning in the drawings is as follows:

100. a pressure boosting device; 20. a booster reversing valve; 30. a back pressure mechanism; 31. a first back pressure valve set; 311. a third check valve; 312. a first overflow valve; 32. a second back pressure valve set; 40. a booster cylinder; 401. a first high pressure rodless cavity; 402. a first low pressure, rod chamber; 403. a second low pressure rod chamber; 404. a second high pressure rodless cavity; 405. a first high pressure rod chamber; 406. a second high pressure rod cavity; 41. a first check valve; 42. a second one-way valve; 43. a main cylinder body; 44. a first side cylinder body; 45. a second side cylinder; 46. a piston member; 461. a master piston block; 462. a first slave piston block; 463. a second slave piston block; 47. a connecting rod; 50. a confluence mechanism; 501. a first merging inlet; 502. a second merging inlet; 503. an outflow port; 51. a first cartridge valve; 52. a second cartridge valve; 600. a hydraulic system; 61. driving a reversing valve; 62. an actuator; 621. a first working chamber; 622. a second working chamber; 63. an oil inlet path; 64. an oil pump; 65. an oil outlet oil path; 66. a second overflow valve; 67. an oil tank; 68. hydraulic locking; 700. engineering machinery equipment; 71. a main carrying platform; 72. a telescoping mechanism; 73. and a swinging mechanism.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully below. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 to 4, a supercharging device 100 according to an embodiment of the present invention is used for increasing output hydraulic pressure. The supercharging device 100 comprises a supercharging reversing valve 20, a backpressure mechanism 30 connected with the supercharging reversing valve 20, a supercharging cylinder 40 connected with the backpressure mechanism 30 and a confluence mechanism 50 connected with the supercharging cylinder 40; the pressure-increasing reversing valve 20 is provided with a first oil inlet, a first working oil port and a second working oil port; the back pressure mechanism 30 comprises a first back pressure valve group 31 communicated with the first working oil port and a second back pressure valve group 32 communicated with the second working oil port; a first high-pressure rodless cavity 401, a first low-pressure rod cavity 402, a second low-pressure rod cavity 403 and a second high-pressure rodless cavity 404 are sequentially arranged in the pressure cylinder 40; the output port of the first back pressure valve set 31 is communicated to the first low pressure rodless cavity 402; the output port of the second back pressure valve set 32 is communicated to the second low pressure rod chamber 403; a first check valve 41 is connected between the output port of the first back pressure valve group 31 and the second high-pressure rodless cavity 404; a second check valve 42 is connected between the output port of the second back pressure valve group 32 and the first high-pressure rodless cavity 401; the merging mechanism 50 communicates with the first high-pressure rodless chamber 401 and the second high-pressure rodless chamber 404, respectively.

Referring to fig. 2, by outputting hydraulic oil from the first working oil port or the second working oil port, when the hydraulic oil enters the first low-pressure rod chamber 402 or the second low-pressure rod chamber 403, since the piston action areas of the first low-pressure rod chamber 402 and the second low-pressure rod chamber 403 are larger than the piston action areas of the second high-pressure rodless chamber 404 and the first high-pressure rodless chamber 401, the second high-pressure rodless chamber 404 or the first high-pressure rodless chamber 401 outputs high-pressure hydraulic oil through the confluence mechanism 50, thereby increasing the output load force.

In one embodiment, the pressure-increasing cylinder 40 includes a main cylinder 43, a first side cylinder 44 connected to one end of the main cylinder 43, a second side cylinder 45 connected to one end of the main cylinder 43, and a piston member 46; the piston member 46 includes a master piston block 461 disposed in the master cylinder 43, a first slave piston block 462 disposed in the first side cylinder 44, and a second slave piston block 463 disposed in the second side cylinder 45; the master piston block 461, the first slave piston block 462 and the second slave piston block 463 are arranged in a linkage manner; the main cylinder 43 forms a first low-pressure rod chamber 402 and a second low-pressure rod chamber 403 under the partition of the main piston block 461; the first side cylinder 44 forms a first high pressure rodless chamber 401 and a first high pressure rod chamber 405 separated by a first slave piston block 462; the second side cylinder 45 forms a second high pressure rodless chamber 404 and a second high pressure rod chamber 406 at the separation of the second slave piston block 463; the output port of the first back pressure valve set 31 is also communicated to the second high pressure rod cavity 406; the output of the second back pressure valve set 32 is connected to the first high pressure stemmed chamber 405.

Specifically, the main cylinder 43 has an inner diameter larger than that of the first or second side cylinder 44 or 45, and the side surface area of the main piston block 461 is larger than that of the first or second sub-piston block 462 or 463; the first high-pressure rod cavity 405 and the first low-pressure rod cavity 402 or the second low-pressure rod cavity 403 and the second high-pressure rod cavity 406 are arranged in a separated mode; in the present embodiment, the master piston block 461, the first slave piston block 462, and the second slave piston block 463 are linked by the connecting rod 47; since the hydraulic oil can be simultaneously injected into the first low-pressure rod-containing chamber 402 and the second high-pressure rod-containing chamber 406, or the second low-pressure rod-containing chamber 403 and the first high-pressure rod-containing chamber 405, the thrust force to the piston member 46 can be increased, and the output load force can be further increased.

In one embodiment, the first back pressure valve set 31 includes a third check valve 311 and a first relief valve 312, which are arranged in parallel. Specifically, the structure of the second back pressure valve set 32 is the same as that of the first back pressure valve set 31, so that when the first low-pressure rod cavity 402 or the second low-pressure rod cavity 403 is compressed, hydraulic oil flows backwards through the first back pressure valve set 31 or the second back pressure valve set 32, and the hydraulic pressure in the second high-pressure rodless cavity 404 is prevented from being too high through the action of the first overflow valve 312.

In one embodiment, the merging mechanism 50 is provided with a first merging inlet 501 communicating with the second high-pressure rodless chamber 404; the confluence mechanism 50 is also provided with a second confluence inlet 502 communicated with the first high-pressure rodless cavity 401; the merging mechanism 50 is also provided with an outlet 503; the merging mechanism 50 includes a first cartridge 51 communicating with a first merging inlet 501 and a second cartridge 52 communicating with a second merging inlet 502; one output port of the first cartridge valve 51 is connected to the outlet 503, and the other output port of the first cartridge valve 51 is connected to the control end of the second cartridge valve 52; one output port of the second cartridge 52 is connected to the outlet 503 and the other output port of the second cartridge 52 is connected to the control port of the first cartridge 51.

When the hydraulic oil enters from the first confluence inlet 501, one path of the hydraulic oil flowing out of the first cartridge valve 51 flows out of the confluence mechanism 50 from the outlet 503, and the other path of the hydraulic oil triggers the control end of the second cartridge valve 52 to plug the inlet and the outlet of the second cartridge valve 52, so that the hydraulic oil is prevented from flowing onto the second cartridge valve 52 from the outlet 503.

When hydraulic oil firstly enters from the second confluence inlet 502, one path of hydraulic oil flowing out of the second cartridge valve 52 flows out of the confluence mechanism 50 from the outlet 503, and the other path of hydraulic oil triggers the control end of the first cartridge valve 51 to plug the inlet and the outlet of the first cartridge valve 51, so that the hydraulic oil is prevented from flowing to the first cartridge valve 51 from the outlet 503; in other embodiments, the merging mechanism 50 may also be a shuttle valve.

Under the direction control of the pressure-increasing reversing valve 20, when hydraulic oil flows out from the first working oil port, the hydraulic oil enters the first low-pressure rod cavity 402 from the first back pressure valve set 31, because the acting area in the first low-pressure rod cavity 402 is larger than that in the second high-pressure rodless cavity, the hydraulic oil in the first low-pressure rod cavity 402 pushes the master piston block 461 to move in the direction close to the second high-pressure rodless cavity 404, the second high-pressure rodless cavity 404 outputs high-pressure oil, and the first check valve 41 limits the backflow of the hydraulic oil in the second high-pressure rodless cavity 404.

After the master piston block 461 moves to the extreme position in the direction close to the second high-pressure rodless cavity 404, by switching the pressure-increasing reversing valve 20, the hydraulic oil flows out from the second working oil port, the hydraulic oil enters the second low-pressure rod cavity 403 from the second back pressure valve set 32, because the acting area in the second low-pressure rod cavity 403 is larger than that in the first high-pressure rodless cavity, the hydraulic oil in the second low-pressure rod cavity 403 pushes the master piston block 461 to move in the direction close to the first high-pressure rodless cavity 401, the first high-pressure rodless cavity 401 outputs high-pressure oil, and the second check valve 42 limits the backflow of the hydraulic oil in the first high-pressure rodless cavity 401. The merging mechanism 50 selects a source of high-pressure oil from the first high-pressure rodless cavity 401 and the second high-pressure rodless cavity 404, and switches between the first working port and the second working port to maintain a high output load force of the supercharging device 100.

Referring to fig. 1, the present invention further provides a hydraulic system 600, including: the hydraulic system comprises a supercharging device 100, a driving reversing valve 61 connected with the supercharging device 100, an actuating mechanism 62 connected with the driving reversing valve 61, an oil inlet path 63 communicated with a first oil inlet, an oil pump 64 pumping hydraulic oil to the first oil inlet path 63 and an oil outlet path 65 connected with the driving reversing valve 61; the driving reversing valve 61 is provided with a second oil inlet communicated with the outflow port 503 of the confluence mechanism 50; the drive reversing valve 61 is also provided with a second oil return port communicated with the oil outlet oil way 65; the driving reversing valve 61 is also provided with a third working oil port communicated with the first acting cavity 621 of the actuating mechanism 62; the drive switch valve 61 is also provided with a fourth working fluid port communicating with the second working chamber 622 of the actuator 62.

Specifically, after the oil pump 64 pumps hydraulic oil to the supercharging device 100, the load output by the merging mechanism 50 is higher than the load of the oil pump 64 through the adjustment of the supercharging device 100; the driving reversing valve 61 has two working states, in the first working state, the second oil inlet is communicated with the third working oil port, and the second oil return port is communicated with the fourth working oil port; in the second working state, the second oil inlet is communicated with the fourth working oil port, and the second oil return port is communicated with the third working oil port, so that the actuating mechanism 62 can move in different directions.

In one embodiment, the booster reversing valve 20 is a three-position, four-way valve; the middle position function of the pressure-increasing reversing valve 20 is H-shaped; specifically, the booster reversing valve 20 has three working states, in a first working state of the booster reversing valve 20, a first oil inlet of the booster reversing valve 20 is communicated with a first working oil port, and a first oil return port of the booster reversing valve 20 is communicated with a second working oil port; in a second working state of the booster reversing valve 20, a first oil inlet of the booster reversing valve 20 is communicated with a second working oil port, and a first oil return port of the booster reversing valve 20 is communicated with a first working oil port; in a third working state of the pressure-increasing reversing valve 20, the first oil inlet, the first working oil port, the first oil return port, and the second working oil port of the pressure-increasing reversing valve 20 are communicated with each other, so that the moving direction of the piston 46 in the pressure cylinder 40 can be switched, and the output of the pressure-increasing device 100 is maintained.

In one embodiment, the hydraulic system 600 further includes a second relief valve 66 connected between the oil inlet path 63 and the oil outlet path 65, and an oil tank 67 for storing hydraulic oil; a suction port of the oil pump 64 extends into the oil tank 67 through a pipe; one end of the oil outlet passage 65 extends into the oil tank 67; specifically, the second relief valve 66 prevents the pressure-increasing switching valve 20 from being damaged due to an excessively high oil pressure of the oil pump 64, and the hydraulic oil stored in the oil tank 67 allows the oil pump 64 to continuously suck the hydraulic oil, thereby preventing interruption.

In one embodiment, hydraulic system 600 further includes hydraulic lock 68; the third working oil port of the driving reversing valve 61 is communicated with a first acting cavity 621 of the actuating mechanism 62 through a hydraulic lock 68; the oil outlet oil path 65 is communicated with a second acting cavity 622 of the actuating mechanism 62 through a hydraulic lock 68; thereby preventing the hydraulic oil of the first working chamber 621 or the second working chamber 622 from actively flowing backward after the output of the oil pump 64 is stopped, so as to maintain the telescopic length or angular state of the actuator 62.

Referring to fig. 3 and 4, the present invention also provides an engineering mechanical apparatus 700, including: a main stage 71 and at least one hydraulic system 600; the hydraulic system 600 is mounted on the main stage 71.

In one embodiment, the construction machine equipment 700 further includes a telescopic mechanism 72 connected to the main stage 71, the telescopic mechanism 72 is driven by a hydraulic system 600a, and in the hydraulic system 600a for driving the telescopic mechanism 72, the actuator 62 is a cylinder.

In one embodiment, the construction machine equipment 700 further includes a swing mechanism 73 connected to the main stage 71, the swing mechanism 73 is driven by a hydraulic system 600b, and in the hydraulic system 600b that drives the swing mechanism 73, the actuator 62 is an oil motor.

Specifically, the work machine 700 may be a crane or a vehicle antenna.

In this embodiment, by outputting hydraulic oil from the first working oil port or the second working oil port, when the hydraulic oil enters the first low-pressure rod cavity or the second low-pressure rod cavity, because the piston action areas of the first low-pressure rod cavity and the second low-pressure rod cavity are larger than the piston action areas of the second high-pressure rodless cavity and the first high-pressure rodless cavity, the second high-pressure rodless cavity or the first high-pressure rodless cavity outputs high-pressure hydraulic oil through the confluence mechanism, thereby increasing the output load force.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A supercharging arrangement, comprising: the device comprises a pressurization reversing valve, a backpressure mechanism connected with the pressurization reversing valve, a pressurization cylinder connected with the backpressure mechanism and a confluence mechanism connected with the pressurization cylinder; the pressure-boosting reversing valve is provided with a first oil inlet, a first working oil port and a second working oil port; the back pressure mechanism comprises a first back pressure valve group communicated with the first working oil port and a second back pressure valve group communicated with the second working oil port; a first high-pressure rodless cavity, a first low-pressure rod cavity, a second low-pressure rod cavity and a second high-pressure rodless cavity are sequentially arranged in the booster cylinder; an output port of the first back pressure valve group is communicated to the first low-pressure rod cavity; an output port of the second back pressure valve group is communicated to the second low-pressure rod cavity; a first check valve is connected between the output port of the first back pressure valve group and the second high-pressure rodless cavity; a second check valve is connected between the output port of the second back pressure valve group and the first high-pressure rodless cavity; the confluence mechanism is communicated to the first high-pressure rodless cavity and the second high-pressure rodless cavity respectively.

2. The supercharging apparatus of claim 1, wherein the supercharging cylinder comprises a main cylinder body, a first side cylinder body connected to one end of the main cylinder body, a second side cylinder body connected to one end of the main cylinder body, and a piston member; the piston member includes a master piston block disposed in the master cylinder, a first slave piston block disposed in the first side cylinder, and a second slave piston block disposed in the second side cylinder; the master piston block, the first slave piston block and the second slave piston block are arranged in a linkage manner; the main cylinder body forms the first low-pressure rod cavity and the second low-pressure rod cavity under the separation of the main piston block; the first side cylinder body forms the first high-pressure rodless cavity and the first high-pressure rod cavity under the separation of the first auxiliary piston block; the second side cylinder body forms the second high-pressure rodless cavity and a second high-pressure rod cavity under the separation of the second slave piston block; the output port of the first back pressure valve group is also communicated to the second high-pressure rod cavity; an output port of the second back pressure valve group is communicated to the first high-pressure rod cavity.

3. The booster of claim 1, wherein the first set of backpressure valves includes a third check valve and a first relief valve arranged in parallel.

4. The supercharging apparatus according to claim 1, wherein the merging mechanism is provided with a first merging inlet port that communicates with the second high-pressure rodless chamber; the confluence mechanism is also provided with a second confluence inlet communicated with the first high-pressure rodless cavity; the confluence mechanism is also provided with a flow outlet; the confluence mechanism comprises a first cartridge valve communicated with the first confluence inlet and a second cartridge valve communicated with the second confluence inlet; one output port of the first cartridge valve is communicated to the flow outlet, and the other output port of the first cartridge valve is communicated to the control end of the second cartridge valve; one output port of the second cartridge valve is communicated to the flow outlet, and the other output port of the second cartridge valve is communicated to the control end of the first cartridge valve.

5. A hydraulic system is characterized by comprising the supercharging device as claimed in any one of claims 1 to 4, a drive reversing valve connected with the supercharging device, an actuating mechanism connected with the drive reversing valve, an oil inlet oil way communicated with the first oil inlet, an oil pump for pumping hydraulic oil to the first oil inlet oil way and an oil outlet oil way connected with the drive reversing valve; the driving reversing valve is provided with a second oil inlet communicated with the outflow port of the confluence mechanism; the drive reversing valve is also provided with a second oil return port communicated with the oil outlet oil way; the driving reversing valve is also provided with a third working oil port communicated with the first action cavity of the actuating mechanism; the driving reversing valve is also provided with a fourth working oil port communicated with the second working cavity of the actuating mechanism.

6. The hydraulic system of claim 5, wherein the boost reversing valve is a three-position, four-way valve; the middle position function of the pressurization reversing valve is H-shaped.

7. The hydraulic system according to claim 5, further comprising a second overflow valve connected between the oil inlet path and the oil outlet path, and an oil tank for storing hydraulic oil; the inlet of the oil pump extends to the oil tank through a pipeline; one end of the oil outlet oil way extends into the oil tank.

8. The hydraulic system of claim 5, further comprising a hydraulic lock; a third working oil port of the driving reversing valve is communicated with a first acting cavity of the actuating mechanism through the hydraulic lock; and the oil outlet oil path is communicated with a second acting cavity of the actuating mechanism through the hydraulic lock.

9. A construction machine, comprising: a main stage and at least one hydraulic system according to claim 5; the hydraulic system is arranged on the main carrying platform.

10. The construction machinery equipment according to claim 9, further comprising a telescopic mechanism connected to the main stage, the telescopic mechanism being driven by the hydraulic system, wherein in the hydraulic system driving the telescopic mechanism, the actuator is a cylinder; and/or the presence of a catalyst in the reaction mixture,

the engineering mechanical equipment further comprises a swinging mechanism connected with the main carrying platform, the swinging mechanism is driven by the hydraulic system, and in the hydraulic system for driving the swinging mechanism, the executing mechanism is an oil motor.

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