high and low pressure power station

Abstract

The application discloses a high-low pressure power station and relates to the technical field of hydraulic power sources. The high-low pressure power station comprises an engine, a double-output shaft pump, a first output control structure arranged above the double-output shaft pump, a high-pressure system, an installation seat, a high-pressure oil tank, an eccentric part arranged between the installation seat and the high-pressure oil tank, four groups of plunger pairs arranged in a linear array between the installation seat and the high-pressure oil tank, and a second output control structure installed on the side of the fixing block away from the installation seat. The high-low pressure power station can drive the double-output shaft pump to control the output of hydraulic oil with different flow rates, different safety valve pressures are arranged in each loop, the requirements of driving different hydraulic tools are met, one product can meet the use requirements of different tools, the application range of the device is improved, the use cost is reduced, the use effect is good, the device is convenient to move, high in flexibility and convenient to use.

Description

Technical Field

[0001] This invention relates to the field of hydraulic power source technology, specifically high and low pressure power stations. Background Technology

[0002] Hydraulic power units can drive more than ten types of hydraulic equipment, such as hydraulic slurry pumps, hydraulic breakers, hydraulic circular saws, and hydraulic welding machines. Their advantages include easy mobility, compact size, and convenient operation. Furthermore, hydraulic power units are generally high-efficiency power devices powered by diesel or gasoline engines, driven by hydraulic pumps, and using hydraulic oil as the medium. Because they do not require an external power source, they do not suffer from power shortages due to power outages. They can operate as long as there is oil, making them more suitable for field operations and offering higher safety.

[0003] With the development of technology, the types of hydraulically driven tools have gradually increased, and people's requirements for switching between tools with different flow and pressure needs are also getting higher and higher.

[0004] Existing hydraulic power stations can only drive high-flow, low-pressure tools or high-pressure tools. A single device cannot drive tools with two different pressures, resulting in low applicability. Furthermore, their large size makes them inconvenient to move. Therefore, we propose a high-low pressure power station to solve these problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a high-low pressure power station, which solves the problem that a single device cannot drive tools with two different pressures, has low applicability, and is inconvenient to move.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-low pressure power station, including an engine and a dual-output shaft pump, one side of which is connected to the engine via a coupling, and a first output control structure is disposed above the dual-output shaft pump; a high-pressure system, disposed on the side of the dual-output shaft pump away from the engine, the high-pressure system including a mounting base and a high-pressure oil tank, an eccentric component disposed between the mounting base and the high-pressure oil tank, the eccentric component being mounted on the dual-output shaft pump for controlling the output of high-pressure oil, four sets of plunger pairs linearly arranged between the mounting base and the high-pressure oil tank, a switching valve mounted on the mounting base, a safety valve disposed on one side of the switching valve, a fixing block mounted on one side of the mounting base, the upper end of the fixing block being connected to the first output control structure, and a second output control structure disposed on the side of the fixing block away from the mounting base for outputting high-pressure oil; and a high-level oil tank, disposed above the connection between the engine and the dual-output shaft pump for outputting oil to the dual-output shaft pump and the high-pressure oil tank.

[0007] Furthermore, a fan is installed outside the connection between the engine and the dual output shaft pump. The high-level oil tank is installed on the upper end of the fan by screws. An oil inlet pipe is installed on one side below the high-level oil tank. The lower end of the oil inlet pipe is connected to the dual output shaft pump for outputting low-pressure oil.

[0008] Furthermore, a cooling system is provided on one side of the dual output shaft pump and the high-level oil tank. The upper end of the cooling system is connected to one end of the high-level oil tank through a pipe. The lower end of the cooling system on the side away from the engine is connected to a delivery pipe. The upper end of the delivery pipe is connected to the first output control structure.

[0009] Furthermore, the first output control structure includes an output control valve, which is mounted on the upper end of the mounting base. The output control valve is provided with two external connectors for connecting to a low-pressure device to output low-pressure oil.

[0010] Furthermore, the eccentric component includes a first bearing, a first retaining ring, an eccentric shaft, a second retaining ring, a second bearing, and a counterweight. The first bearing is mounted on a mounting base, the first retaining ring is mounted on the first bearing, the second retaining ring is mounted on the side of the second bearing near the mounting base, the eccentric shaft passes through the first bearing and the second bearing, the counterweight is mounted on the end of the eccentric shaft away from the mounting base, and the other end of the eccentric shaft is connected to a dual-output shaft pump to realize the change in oil volume between the mounting base and the high-pressure oil tank, thereby outputting oil from the high-pressure system.

[0011] Furthermore, the plunger assembly includes a high-pressure plunger assembly and a low-pressure plunger assembly. There are three sets of low-pressure plunger assemblies and one set of high-pressure plunger assemblies. The low-pressure plunger assemblies and high-pressure plunger assemblies are used to output high-flow-rate oil and low-flow-rate oil in the high-pressure system, respectively. The mounting base is equipped with an oil outlet check valve in a linear array, matching the number of plunger assemblies, for controlling the output of oil.

[0012] Furthermore, the second output control structure includes a high-pressure check valve, a spring, an oil guide column, a valve core seat, a thrust bearing, a valve core, a valve core mounting base, a handwheel, and an operating lever. This structure is used to separate high-pressure oil from low-pressure oil in the high-pressure system. The high-pressure check valve, spring, oil guide column, and valve core seat are all mounted on a fixed block. The thrust bearing is mounted on the valve core seat. The valve core is mounted on the valve core mounting base, which is mounted on the fixed block by screws. The handwheel is mounted on the end of the valve core mounting base away from the fixed block, and the operating lever is mounted on the handwheel. This structure is used to control the output of oil in the high-pressure system.

[0013] Furthermore, a high-pressure return oil pipe is installed on the fixing block, and the upper end of the high-pressure return oil pipe is connected to the output control valve. A double-pipe single-plug connector is installed on the side of the fixing block away from the engine. The double-pipe single-plug connector is used to connect to an external high-pressure device for outputting oil.

[0014] Furthermore, an oil suction pipe is installed on one side of the high-pressure oil tank, and the upper end of the oil suction pipe is installed at the bottom of the high-level oil tank near the heat dissipation system.

[0015] Furthermore, an outer frame is installed on the outside of the engine, a base plate is installed at the bottom of the outer frame, wheels are installed on both sides of the base plate, and a push-pull handle is rotatably installed on the end of the outer frame away from the engine, which can move the entire device; the base plate is installed at the bottom of the engine and the fan, and the outer frame is installed outside the engine, the high-level oil tank and the high-pressure system.

[0016] The present invention has the following beneficial effects:

[0017] (1) The high and low pressure power station, through the use of the engine, high-level oil tank, dual output shaft pump, first output control structure, high pressure system and second output control structure, can drive the dual output shaft pump to control the output of hydraulic oil with different flow rates. Each circuit is set with different safety valve pressure to meet the requirements of driving different hydraulic tools. This allows one product to meet the usage requirements of different tools, improves the applicability of the device, reduces the cost of use, and has a good effect.

[0018] (2) The high and low voltage power station is used in conjunction with the set outer frame, vehicle plate, wheels and push and pull handles to push or pull the whole device according to the user's needs. It can quickly move the whole device to the position to be used, which is highly flexible and easy to use.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 A structural diagram from another perspective;

[0022] Figure 3 This is an explosion diagram of the high-pressure system of the present invention;

[0023] Figure 4 This is a hydraulic diagram of the present invention.

[0024] In the diagram, 1. Outer frame; 2. Engine; 3. High-level fuel tank; 4. Wheels; 5. Cooling system; 6. Output control valve; 7. Base plate; 8. Fan; 9. Dual-output shaft pump; 10. Push-pull handle; 11. External connector; 12. Oil inlet pipe; 13. Delivery pipe; 14. Mounting base; 15. First bearing; 16. First snap ring; 17. Eccentric shaft; 18. Second snap ring; 19. Second bearing; 20. Counterweight; 21. 1. Oil outlet check valve; 22. Low-pressure plunger pair; 23. High-pressure plunger pair; 24. Diverter valve; 25. Safety valve; 26. High-pressure check valve; 27. Fixing block; 28. Spring; 29. ​​Oil guide column; 30. Valve core seat; 31. Thrust bearing; 32. Valve core; 33. Valve core fixing seat; 34. Hand ball; 35. Operating lever; 36. High-pressure oil tank; 37. Oil suction pipe; 38. High-pressure end return oil pipe; 39. Double pipe single plug connector. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0027] Please see Figures 1-4This invention provides a technical solution: a high-low voltage power station, including an engine 2 and a dual-output shaft pump 9. One side of the dual-output shaft pump 9 is connected to the engine 2 via a coupling. A first output control structure is provided above the dual-output shaft pump 9. A high-voltage system is located on the side of the dual-output shaft pump 9 away from the engine 2. The high-voltage system includes a mounting base 14 and a high-voltage oil tank 36. An eccentric component is provided between the mounting base 14 and the high-voltage oil tank 36. The eccentric component is mounted on the dual-output shaft pump 9 and is used to control the output of high-voltage oil. The mounting base 14... Four sets of plunger pairs are linearly arranged between the engine 2 and the high-pressure oil tank 36. A switching valve 24 is installed on the mounting base 14. A safety valve 25 is provided on one side of the switching valve 24. A fixing block 27 is installed on one side of the mounting base 14. The upper end of the fixing block 27 is connected to the first output control structure. A second output control structure is installed on the side of the fixing block 27 away from the mounting base 14 for outputting high-pressure oil. The high-level oil tank 3 is located above the connection between the engine 2 and the dual output shaft pump 9 and is used to output oil to the dual output shaft pump 9 and the high-pressure oil tank 36.

[0028] Specifically, a fan 8 is externally installed at the connection between the engine 2 and the dual output shaft pump 9. The high-level oil tank 3 is installed on the upper end of the fan 8 by screws. An oil inlet pipe 12 is installed on one side below the high-level oil tank 3. The lower end of the oil inlet pipe 12 is connected to the dual output shaft pump 9 for outputting low-pressure oil. A cooling system 5 is provided on one side of the dual output shaft pump 9 and the high-level oil tank 3. The upper end of the cooling system 5 is connected to one end of the high-level oil tank 3 by a pipe. The lower end of the cooling system 5 away from the engine 2 is connected to a delivery pipe 13. The upper end of the delivery pipe 13 is connected to the first output control structure. The first output control structure includes an output control valve 6. The output control valve 6 is installed on the upper end of the mounting base 14. The output control valve 6 is provided with two external connectors 11 for connecting to a low-pressure device to output low-pressure oil.

[0029] In this embodiment, the safety valve 25 is used to set the pressure value of the high-pressure system. When there are no external tools, the oil in the four plunger pairs gathers and flows back into the output control valve 6. Through the delivery pipe 13, it flows into the heat dissipation system 5 and then into the high-level oil tank 3 to complete the backflow.

[0030] When an external tool is connected, the tool is connected to the double-pipe single-plug connector 39. The engine 2 drives the dual output shaft pump 9 to operate, which drives the eccentric component to rotate and controls the delivery of oil in the high-pressure system. The oil in the high-pressure system is led out through the safety valve 25 and acts on the switching valve 24. When the oil pressure is less than the set value of the switching valve 24, the four flow channels converge, making the tool work quickly. When the working pressure is greater than the pressure of the switching valve 24, the pressure generated by the high pressure acts on the switching valve 24, causing the switching valve 24 to open. The low pressure flows back to the oil tank, and the high pressure is output through the double-pipe single-plug connector 39. After the double-pipe single-plug connector 39 is set, the high-pressure oil goes from the inner circle of the single pipe to the tool, through the low-pressure pipe on the tool to the outer circle of the single pipe and back to the fixed block 27. Then it is delivered to the output control valve 6, and then to the cooling system 5 and the high-level oil tank 3.

[0031] When a low-pressure tool is needed, connect the low-pressure tool to the two external connectors 11. The engine 2 drives the dual output shaft pump 9 to operate, causing oil to enter the inlet pipe 12 from the high-level oil tank 3, and then flow into the output control valve 6 through the dual output shaft pump 9. The low-pressure oil enters the low-pressure tool from one external connector 11, and then flows into the cooling system 5 through the delivery pipe 13. After cooling, it returns to the high-level oil tank 3. If there is no external tool, it can also flow directly into the cooling system 5 and the high-level oil tank 3 through the output control valve 6 and the delivery pipe 13 for internal return.

[0032] Specifically, the eccentric component includes a first bearing 15, a first retaining ring 16, an eccentric shaft 17, a second retaining ring 18, a second bearing 19, and a counterweight 20. The first bearing 15 is mounted on the mounting base 14, the first retaining ring 16 is mounted on the first bearing 15, the second retaining ring 18 is mounted on the side of the second bearing 19 near the mounting base 14, the eccentric shaft 17 passes through the first bearing 15 and the second bearing 19, and the counterweight 20 is mounted on the end of the eccentric shaft 17 away from the mounting base 14. The other end of the eccentric shaft 17 is connected to the dual-output shaft pump 9. The components are connected to realize the change of oil volume between the mounting base 14 and the high-pressure oil tank 36, and to output oil in the high-pressure system. The plunger pair includes a high-pressure plunger pair 23 and a low-pressure plunger pair 22. There are three sets of low-pressure plunger pairs 22 and one set of high-pressure plunger pairs 23. The low-pressure plunger pairs 22 and the high-pressure plunger pairs 23 are used to output large-flow and small-flow oil in the high-pressure system, respectively. The mounting base 14 is linearly arrayed with oil outlet check valves 21, which match the number of plunger pairs, and are used to control the output of oil.

[0033] In this embodiment, the dual-output shaft pump 9 drives the counterweight 20 to rotate via the eccentric shaft 17, thereby changing the oil volume between the mounting base 14 and the high-pressure oil tank 36. The oil passes through the safety valve 25 and acts on the switching valve 24. The high-pressure plunger pair 23 is a low-flow plunger pair, and the low-pressure plunger pair 22 is a high-flow plunger pair. When the pressure is less than the pressure set by the switching valve 24, the four sets of output flow rates pass through the internal oil circuit and the output control valve 6 to achieve internal oil return or external tool connection to the cooling system 5 and the high-level oil tank 3. When the pressure is greater than the pressure set by the switching valve 24, the high-pressure oil produced by the high-pressure plunger pair 23 acts on the cylinder of the switching valve 24, returning the three sets of high-flow plunger pairs to the high-level oil tank 3 through the switching valve 24 and the high-pressure check valve 26. The high-pressure oil produced by the high-pressure plunger pair 23 passes through the output control valve 6 to achieve internal oil return or external tool connection to the cooling system 5 and the high-level oil tank 3.

[0034] Specifically, the second output control structure includes a high-pressure check valve 26, a spring 28, an oil guide column 29, a valve core seat 30, a thrust bearing 31, a valve core 32, a valve core fixing seat 33, a handwheel 34, and an operating lever 35. It is used to separate high-pressure oil from low-pressure oil in the high-pressure system. The high-pressure check valve 26, spring 28, oil guide column 29, and valve core seat 30 are all mounted on a fixed block 27. The thrust bearing 31 is mounted on the valve core seat 30, and the valve core 32 is mounted on the valve core fixing seat 33. The valve core fixing seat 33 is mounted on the fixed block 27 by screws. The handwheel 34... Installed on the valve core fixing seat 33 at the end away from the fixing block 27, the operating lever 35 is installed on the hand ball 34 and is used to control the output of oil in the high pressure system. The fixing block 27 is equipped with a high pressure end return oil pipe 38, the upper end of which is connected to the output control valve 6. The fixing block 27 is equipped with a double pipe single plug connector 39 on the side away from the engine 2. The double pipe single plug connector 39 is used to connect to an external high pressure device for outputting oil. The high pressure oil tank 36 is equipped with a suction pipe 37 on one side, the upper end of which is installed at the bottom of the high-level oil tank 3 near the cooling system 5.

[0035] In this embodiment, the high-pressure check valve 26 seals the high and low pressure oils in the high-pressure system, thereby separating the high-pressure oil from the low-pressure oil. The spring 28, guide column 29, valve core seat 30, thrust bearing 31, valve core 32, valve core fixing seat 33, hand ball 34, and operating lever 35 are installed together to form a directional valve, which is used to switch the direction of hydraulic oil in the high-pressure system. The oil enters the high-pressure oil tank 36 through the oil suction pipe 37, and the oil in the fixing block 27 enters the output control valve 6 through the high-pressure end return oil pipe 38.

[0036] Specifically, an outer frame 1 is installed on the outside of the engine 2, a base plate 7 is installed at the bottom of the outer frame 1, wheels 4 are installed on both sides of the base plate 7, and a push-pull handle 10 is rotatably installed on the end of the outer frame 1 away from the engine 2, which can move the entire device; the base plate 7 is installed at the bottom of the engine 2 and the fan 8, and the outer frame 1 is installed outside the engine 2, the high-level oil tank 3 and the high-pressure system.

[0037] In this embodiment, the outer frame 1 is welded to the base plate 7, and the wheels 4 are rotatably mounted on the base plate 7. By pulling or pushing the push handle 10, the entire device can be moved by the wheels 4, making it easy to quickly move the entire device to the position to be used, which is convenient to use.

[0038] When in use, when outputting low-pressure oil, connect the low-pressure tool to the two external connectors 11. The engine 2 drives the dual output shaft pump 9 to operate, so that the oil enters the inlet pipe 12 from the high-level oil tank 3, and then flows into the output control valve 6 through the dual output shaft pump 9. The low-pressure oil enters the low-pressure tool from one external connector 11, and then flows into the cooling system 5 through the delivery pipe 13. After cooling, it returns to the high-level oil tank 3. If there is no external tool, it can also flow directly into the cooling system 5 and the high-level oil tank 3 through the output control valve 6 and the delivery pipe 13 for internal return.

[0039] When outputting high-pressure oil, without external tools, engine 2 drives the dual output shaft pump 9 to operate, which in turn drives the eccentric component to rotate, controlling the delivery of oil in the high-pressure system. The oil in the high-pressure system is led out through safety valve 25 and acts on switching valve 24. The oil in the four plunger pairs collects and flows back, flowing into output control valve 6 through high-pressure end return oil pipe 38, and then into cooling system 5 through delivery pipe 13, thus entering high-level oil tank 3 to complete the return flow.

[0040] When an external tool is connected, it is connected to the double-pipe single-plug connector 39. The engine 2 drives the dual output shaft pump 9 to operate, which in turn drives the eccentric component to rotate and controls the delivery of oil in the high-pressure system. The oil in the high-pressure system is led out through the safety valve 25 and acts on the switching valve 24. When the oil pressure is less than the set value of the switching valve 24, the oil in the four plunger pairs converges, making the tool work quickly. When the working pressure is greater than the pressure of the switching valve 24, the pressure generated by the high pressure acts on the switching valve 24, causing the switching valve 24 to open. The low-pressure oil enters the output control valve 6 through the high-pressure end return oil pipe 38, and then flows back to the high-level oil tank 3 through the delivery pipe 13 and the cooling system 5. The high-pressure oil is output through the double-pipe single-plug connector 39. After the double-pipe single-plug connector 39 is set, the high-pressure oil goes from the inner circle of the single pipe to the tool, through the low-pressure pipe on the tool to the outer circle of the single pipe and back to the fixed block 27. Then it is delivered to the output control valve 6 through the high-pressure end return oil pipe 38, and then delivered to the cooling system 5 and the high-level oil tank 3.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high- and low-voltage power station, including an engine (2), characterized in that, Also includes: A dual-output shaft pump (9) is connected to the engine (2) on one side via a coupling, and a first output control structure is provided above the dual-output shaft pump (9); A high-pressure system is provided on the side of the dual-output shaft pump (9) away from the engine (2). The high-pressure system includes a mounting base (14) and a high-pressure oil tank (36). An eccentric component is provided between the mounting base (14) and the high-pressure oil tank (36). The eccentric component is installed on the dual-output shaft pump (9) and is used to control the output of high-pressure oil. Four sets of plunger pairs are arranged in a linear array between the mounting base (14) and the high-pressure oil tank (36). A switching valve (24) is installed on the mounting base (14). A safety valve (25) is provided on one side of the switching valve (24). A fixing block (27) is installed on one side of the mounting base (14). The upper end of the fixing block (27) is connected to the first output control structure. A second output control structure is installed on the side of the fixing block (27) away from the mounting base (14) and is used to output high-pressure oil. High-level oil tank (3), which is located above the connection between the engine (2) and the dual output shaft pump (9), is used to output oil to the dual output shaft pump (9) and the high-pressure oil tank (36); The first output control structure includes an output control valve (6), which is mounted on the upper end of the mounting base (14). The output control valve (6) is provided with two external connectors (11) for connecting to a low-pressure device and outputting low-pressure oil. A dual-output shaft pump (9) is connected to the output control valve (6) through a pipeline. A high-pressure end return oil pipe (38) is installed on the fixed block (27). The upper end of the high-pressure end return oil pipe (38) is connected to the output control valve (6). A double-pipe single-plug connector (39) is installed on the side of the fixed block (27) away from the engine (2). The double-pipe single-plug connector (39) is used to connect to an external high-pressure device for outputting oil.

2. The high and low voltage power station according to claim 1, characterized in that: A fan (8) is installed outside the connection between the engine (2) and the dual output shaft pump (9). The high-level oil tank (3) is installed on the upper end of the fan (8) by screws. An oil inlet pipe (12) is installed on one side below the high-level oil tank (3). The lower end of the oil inlet pipe (12) is connected to the dual output shaft pump (9) for outputting low-pressure oil.

3. The high and low voltage power station according to claim 2, characterized in that: A cooling system (5) is provided on one side of the dual output shaft pump (9) and the high-level oil tank (3). The upper end of the cooling system (5) is connected to one end of the high-level oil tank (3) through a pipe. The lower end of the cooling system (5) away from the engine (2) is connected to a delivery pipe (13). The upper end of the delivery pipe (13) is connected to the first output control structure.

4. The high and low voltage power station according to claim 3, characterized in that: The eccentric component includes a first bearing (15), a first snap ring (16), an eccentric shaft (17), a second snap ring (18), a second bearing (19), and a counterweight (20). The first bearing (15) is mounted on the mounting base (14), the first snap ring (16) is mounted on the first bearing (15), the second snap ring (18) is mounted on the side of the second bearing (19) near the mounting base (14), the eccentric shaft (17) passes through the first bearing (15) and the second bearing (19), the counterweight (20) is mounted on the end of the eccentric shaft (17) away from the mounting base (14), and the other end of the eccentric shaft (17) is connected to a dual-output shaft pump (9) to realize the change of oil volume between the mounting base (14) and the high-pressure oil tank (36) and to output oil in the high-pressure system.

5. The high and low voltage power station according to claim 4, characterized in that: The plunger assembly includes a high-pressure plunger assembly (23) and a low-pressure plunger assembly (22). There are three sets of low-pressure plunger assemblies (22) and one set of high-pressure plunger assemblies (23). The low-pressure plunger assembly (22) and the high-pressure plunger assembly (23) are used to output high-flow-rate oil and low-flow-rate oil in the high-pressure system, respectively. The mounting base (14) is equipped with an oil outlet check valve (21) in a linear array, which matches the number of plunger assemblies and is used to control the output of oil.

6. The high and low voltage power station according to claim 5, characterized in that: The second output control structure includes a high-pressure check valve (26), a spring (28), an oil guide column (29), a valve core seat (30), a thrust bearing (31), a valve core (32), a valve core fixing seat (33), a hand ball (34), and an operating lever (35), used to separate high-pressure oil and low-pressure oil in the high-pressure system. The high-pressure check valve (26), spring (28), oil guide column (29), and valve core seat (30) are all mounted on a fixed block (27). The thrust bearing (31) is mounted on the valve core seat (30). The valve core (32) is mounted on the valve core fixing seat (33). The valve core fixing seat (33) is mounted on the fixed block (27) by screws. The hand ball (34) is mounted on the end of the valve core fixing seat (33) away from the fixed block (27). The operating lever (35) is mounted on the hand ball (34) and used to control the output of oil in the high-pressure system.

7. The high and low voltage power station according to claim 6, characterized in that: An oil suction pipe (37) is installed on one side of the high-pressure oil tank (36), and the upper end of the oil suction pipe (37) is installed on the bottom of the high-level oil tank (3) near the heat dissipation system (5).

8. The high and low voltage power station according to claim 1, characterized in that: The engine (2) is equipped with an outer frame (1), and a base plate (7) is installed at the bottom of the outer frame (1). Wheels (4) are installed on both sides of the base plate (7). A push-pull handle (10) is rotatably installed on the end of the outer frame (1) away from the engine (2), which can move the entire device. The base plate (7) is installed at the bottom of the engine (2) and the fan (8), and the outer frame (1) is installed outside the engine (2), the high-level oil tank (3) and the high-pressure system.

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