Energy-storage and energy-saving type square box hydraulic station

Abstract

The utility model relates to an energy storage and energy saving type square box hydraulic station which comprises an oil tank and an energy storage box, a vane pump and a motor are arranged on the oil tank, the input end of the vane pump communicates with the oil tank, the output end of the vane pump communicates with a multi-way connector, and the multi-way connector communicates with the energy storage box. An oil path block communicated with the multi-way connector is further fixed to the oil tank, a leakage-free pressure reducing valve and a reversing valve are further arranged on the oil path block in a communicated mode, an oil supply pipeline and an oil return pipeline are formed among the oil tank, the oil path block, the leakage-free pressure reducing valve and the reversing valve, and an oil supply connector and an oil return connector are arranged on the oil path block. The multi-way connector is further communicated with a digital display pressure total meter, an energy accumulator communicated with the multi-way connector is further arranged in the energy storage box, the energy accumulator is in telecommunication connection with an electric control device, and the electric control device is in telecommunication connection with the digital display pressure total meter and the motor. The hydraulic station has high stability.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic stations, and in particular to an energy-storage energy-saving square box hydraulic station. Background Art

[0002] The hydraulic station is a hydraulic source device or a hydraulic device including a control valve, which is composed of hydraulic pumps, drive motors, oil tanks, directional valves, throttle valves, relief valves and other components. It supplies oil according to the flow direction, pressure and flow required by the drive device, and is suitable for various machines where the drive device is separated from the hydraulic station.

[0003] In the related technology, multiple clamps are connected to the hydraulic station. During processing, the clamps need to clamp the workpiece for a long time. The hydraulic station needs to ensure that the hydraulic pressure value connected to the clamp is constant. Generally, a relief valve is used to maintain a constant pressure in the system.

[0004] Regarding the above-mentioned related technologies, when the pressure reducing branch in the pressure reducing valve is in the process of maintaining pressure, the pressure at the working port is relatively high, which may cause leakage at the pressure reducing port, oil drain port or pressure oil port, resulting in pressure fluctuations. At the same time, after the output end of the traditional hydraulic station reaches the required pressure, the hydraulic pump will continue to run, resulting in unnecessary energy consumption. Summary of the invention

[0005] In order to reduce pressure fluctuations in a hydraulic station and improve pressure stability in the hydraulic station, the present application provides an energy-storage energy-saving square box hydraulic station.

[0006] The energy storage energy-saving square box hydraulic station provided in this application adopts the following technical solution:

[0007] An energy storage energy-saving square box hydraulic station comprises an oil tank and an energy storage tank, wherein a vane pump is arranged on the oil tank, a motor is arranged on the vane pump, the vane pump is connected to the motor in a transmission manner, the input end of the vane pump is connected to the oil tank, a shunt pipe is arranged on the output end of the vane pump, a multi-way joint is arranged on the end of the shunt pipe away from the vane pump, an oil circuit block is fixed on the oil tank, the oil circuit block is connected to the multi-way joint, a non-leakage pressure reducing valve and a reversing valve are arranged on the oil circuit block, and the non-leakage pressure reducing valve and the reversing valve are arranged in multiple groups on the oil circuit block. Oil supply pipelines and oil return pipelines are formed between the oil tank, the oil circuit block and any group of leak-free pressure reducing valves and reversing valves. The oil circuit block is provided with oil supply joints and oil return joints. There are multiple oil supply joints connected to the oil supply pipeline, and there are multiple oil return joints connected to the oil return pipeline. A digital pressure gauge is also connected to the multi-way joint. An accumulator is also provided in the energy storage box. The multi-way joint is connected to the accumulator. An electric control device is electrically connected to the accumulator. The electric control device is electrically connected to the digital pressure gauge, and the electric control device is electrically connected to the motor.

[0008] By adopting the above technical solutions, components such as vane pumps, motors, oil manifolds, non-leakage pressure reducing valves, and directional control valves are reasonably arranged in the hydraulic station, effectively controlling the flow direction of hydraulic oil. Through the cooperation of multi-way joints, accumulators, and electric control devices, efficient energy-saving operation of the hydraulic system is achieved. At the same time, the system pressure is monitored in real time through a digital display pressure gauge to ensure the safety and stability of the system during operation.

[0009] Preferably, any one of the non-leakage pressure reducing valves includes a valve body and a limit block. A hydraulic chamber is provided in the valve body, and the limit block is embedded in the hydraulic chamber, dividing the hydraulic chamber into a first chamber and a second chamber. The first chamber and the second chamber are not communicated. The valve body is further provided with an inlet and an outlet. The inlet is communicated with the first chamber, and the outlet is communicated with the second chamber. A first cavity and a second cavity are further provided in the limit block. A communication hole is provided for communicating between the first cavity and the second cavity. The first cavity is communicated with the first chamber, and the second cavity is communicated with the second chamber. A seal is further provided in the first cavity. When the seal abuts against the side of the communication hole away from the second cavity, the first cavity and the second cavity are not communicated. A driving device for driving the seal to move away from the second cavity is provided in the first cavity, and a reset device for resetting the seal is provided in the second cavity.

[0010] By adopting the above technical solutions, the non-leakage pressure reducing valve realizes oil path separation by setting a limit block and a seal, ensuring the independent oil pressure between different chambers. The precise control of the seal prevents oil leakage, ensuring the stability of the system pressure. And the driving device controls the oil flow through the movement of the seal, effectively maintaining the normal working pressure of the system.

[0011] Preferably, any one of the driving devices includes a sliding block. The sliding block slides in the second cavity along the length direction of the limit block. A sealing gasket is sleeved on the sliding block, and the sealing gasket is embedded on the sliding block. The circumferential side of the sealing gasket abuts against the inner side wall of the second cavity. A top block is provided at one end of the sliding block close to the seal. The top block penetrates through the communication hole, and the end of the top block away from the sliding block abuts against the seal. A compression spring is provided at the end of the sliding block away from the top block.

[0012] By adopting the above technical solutions, the compression spring pushes the sliding block to slide in the second cavity along the length direction of the limit block, so that the top block pushes the seal in the first cavity to move away from the second cavity, thereby communicating the first cavity and the second cavity.

[0013] Preferably, an abutting block and an adjusting block are further arranged in any one of the limiting blocks. The abutting block is located at one end of the sliding block away from the top block. The two sides of the axis direction of the compression spring are respectively abutted against the mutually approaching side surfaces of the abutting block and the adjusting block. An adjusting bolt is further arranged at one end of the adjusting block away from the abutting block. The axis direction of the adjusting bolt is parallel to the length direction of the limiting block. The adjusting bolt penetrates through the side wall of the limiting block along its own axis direction and is in threaded connection with the limiting block.

[0014] By adopting the above technical solution, the staff can adjust the pre-tightening force of the compression spring by tightening or loosening the adjusting bolt, so as to change the position of the abutting block in the limiting block, and adjust the pressure reducing effect of the non-leakage pressure reducing valve.

[0015] Preferably, a conical groove is arranged at one end of any one of the sliding blocks away from the top block. The axis direction of the conical groove is parallel to the sliding direction of the sliding block. The conical groove is arranged to shrink from the side close to the abutting block to the side close to the top block. A spherical block is arranged on the side of the abutting block close to the sliding block. The spherical block is tightly abutted in the conical groove.

[0016] By adopting the above technical solution, the spherical block and the conical groove are helpful for dispersing the forces in different directions brought by the compression spring, ensuring that the sliding block slides along the length direction of the limiting block, enabling the top block to always correctly transmit the force to the seal, reducing the movement resistance, and improving the action efficiency and response speed of the seal.

[0017] Preferably, any one of the seals is a steel ball. A first conical surface is formed on the bottom wall of the first cavity close to the second cavity along the length direction of the limiting block. The axis direction of the first conical surface is parallel to the length direction of the limiting block. The first conical surface is arranged to shrink from the side away from the second cavity to the side close to the second cavity. The communication hole is opened on the conical surface. The communication hole is coaxially arranged with the conical surface. The diameter of the communication hole is smaller than the diameter of the steel ball.

[0018] By adopting the above technical solution, the seal is designed with a steel ball and used in cooperation with the conical surface, which can ensure that when the system pressure changes, the steel ball accurately closes or opens the channel, providing a fast and effective sealing effect and preventing oil leakage.

[0019] Preferably, any one of the reset devices includes a fixed block. The fixed block is located on the side of the first cavity away from the second cavity. A sliding groove is arranged on the fixed block. The sliding groove penetrates through the fixed block inward along the side close to the first cavity. A pushing block is arranged in the fixed block. The pushing block is slidably matched in the sliding groove along its depth direction. An embedding groove is further arranged on the pushing block. The embedding groove penetrates through the pushing block from the side close to the fixed block to the side away from the fixed block. The embedding groove is communicated with the first cavity. A reset spring is arranged in the embedding groove. The two ends of the reset spring are respectively abutted against the bottom wall of the sliding groove and the bottom wall of the embedding groove.

[0020] By adopting the above technical solution, the cooperation of the push block and the return spring in the reset device realizes the automatic reset of the seal, ensuring that when the pressure decreases, the seal can quickly return to the initial position, maintaining the stable operation of the system. The first cavity is communicated with the embedding groove, so that the hydraulic pressure inside and outside the push block is balanced, and the push block is only affected by the return spring to push the seal to reset.

[0021] Preferably, a filter screen is further covered outside any one of the limiting blocks. The filter screen is arranged in the first cavity. The limiting block is provided with liquid inlet holes. The liquid inlet holes communicate the first cavity and the first chamber. A plurality of liquid inlet holes are evenly spaced along the axis direction of the limiting block, and the filter screen is arranged outside the liquid inlet holes.

[0022] By adopting the above technical solution, setting a filter screen outside the limiting block can effectively filter impurities in the hydraulic oil entering the first cavity, avoid internal pollution of the non-leakage pressure reducing valve, extend the service life of the non-leakage pressure reducing valve, and ensure the stability and reliability of the hydraulic system.

[0023] Preferably, a pressure display meter is also connected and arranged between any pair of the oil supply pipelines and the oil supply connectors.

[0024] By adopting the above technical solution, setting a pressure display meter between the oil supply pipeline and the oil supply connector can real-time monitor the pressure state of the hydraulic oil about to be output to the hydraulic station after decompression, which is convenient for operators to monitor and adjust, and ensures the safety and working efficiency of the system.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. Through the reasonable layout and control of the vane pump, motor, oil circuit block and accumulator, the hydraulic station realizes efficient energy management and control of the hydraulic oil flow direction, reduces the energy consumption of the system, and improves the overall efficiency of the hydraulic station;

[0027] 2. Through the precise design of the pressure limiting and regulating structure, the non-leakage pressure reducing valve can effectively regulate and distribute the pressure of the hydraulic system, prevent pressure fluctuations and overpressure phenomena, ensure the stable operation of the system under various working conditions, and improve the working efficiency and safety of the equipment;

[0028] 3. The cooperation of the digital display pressure gauge and the electric control device realizes the real-time monitoring and automatic regulation of the hydraulic system pressure, enabling the operator to master the operation state of the system at any time, and improving the safety and working efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is an axonometric view mainly showing the external overall structure of the energy-saving and energy-storing type box hydraulic station in the embodiment of the present application;

[0030] Figure 2 is an axonometric view mainly showing the overall internal structure of the energy storage and energy-saving type square box hydraulic station in the embodiment of the present application;

[0031] Figure 3 is an axonometric view mainly showing the internal structure of the energy storage and energy-saving type square box hydraulic station in the embodiment of the present application;

[0032] Figure 4 is a sectional axonometric view mainly showing the internal structure of the leak-free pressure reducing valve in the embodiment of the present application;

[0033] Figure 5 is Figure 4 the enlarged view at position A in, mainly showing the structure among the seal, the driving device and the reset device.

[0034] Reference numerals: 1, box body; 11, oil tank; 111, oil filling port; 112, liquid level gauge; 12, motor; 13, vane pump; 14, multi-way joint; 15, accumulator; 16, electric control device; 17, reversing valve; 2, oil circuit block; 21, oil supply joint; 22, oil return joint; 3, leak-free pressure reducing valve; 31, valve body; 311, first chamber; 312, liquid inlet; 313, second chamber; 314, liquid outlet; 32, limit block; 321, first cavity; 322, first conical surface; 323, liquid inlet hole; 324, communication hole; 325, second cavity; 33, steel ball; 34, filter screen; 4, driving device; 41, sliding block; 411, top block; 412, conical groove; 413, gasket; 42, abutting block; 421, spherical block; 43, compression spring; 44, adjusting block; 45, adjusting bolt; 5, reset device; 51, fixing block; 511, sliding groove; 52, pushing block; 521, embedding groove; 522, second conical surface; 53, reset spring; 6, digital display total pressure gauge; 7, digital display partial pressure gauge; 8, total pressure display gauge; 9, partial pressure display gauge. Detailed implementation manners

[0035] The following further describes the present application in detail with reference to the attached Figures 1 - 5 drawings.

[0036] The embodiment of the present application discloses an energy storage and energy-saving type square box hydraulic station.

[0037] See Figure 1 , Figure 2, the energy storage and energy-saving type square box hydraulic station includes a box body 1, and a plurality of universal wheels are arranged at the bottom of the box body 1. The box body 1 includes an oil tank 11 and an energy storage box. A fuel filling port 111 is communicated and arranged on the oil tank 11. A liquid level gauge 112 is fixed on the side wall of the oil tank 11. A motor 12 and a vane pump 13 are also fixed in the box body 1. The motor 12 and the vane pump 13 are in transmission connection. The input end of the vane pump 13 extends into the oil tank 11 and is arranged at the bottom of the oil tank 11. A multi-way joint 14 is communicated and arranged at the output end of the vane pump 13. An accumulator 15 is communicated and arranged on the multi-way joint 14. The accumulator 15 is arranged in the energy storage box, and two accumulators 15 are communicated and arranged. An oil circuit block 2 is also communicated and arranged on the multi-way joint 14. A plurality of groups of oil supply joints 21 and oil return joints 22 are also communicated and arranged on the oil circuit block 2. A group of oil supply joints 21 and oil return joints 22 are communicated and arranged on a working device. In actual work, the staff controls the start and stop of the motor 12, and the motor 12 drives the vane pump 13 to pump hydraulic oil from the oil tank 11 into the working device to provide power for the working device.

[0038] See Figure 2 , Figure 3 , a leak-free pressure reducing valve 3 and a reversing valve 17 are also arranged on the oil circuit block 2. An oil supply pipeline and an oil return pipeline are respectively formed between the oil tank 11, the oil circuit block 2, the leak-free pressure reducing valve 3 and the reversing valve 17. Any group of oil supply joints 21 and oil return joints 22 are respectively communicated and arranged on the oil supply pipeline and the oil return pipeline. A plurality of leak-free pressure reducing valves 3 and reversing valves 17 are provided corresponding to a plurality of groups of oil supply joints 21 and oil return joints 22. Any oil supply pipeline is communicated with the multi-way joint 14, and any oil return pipeline is communicated with the upper end of the oil tank 11 on the oil circuit block 2.

[0039] See Figure 4 , Figure 5 , the leak-free pressure reducing valve 3 includes a valve body 31, and the valve body 31 is detachably fixed on the upper side of the oil circuit block 2. A second chamber 313 is opened at one end in the length direction of the valve body 31, and a first chamber 311 is opened on the bottom wall of the second chamber 313. A limiting block 32 is arranged in the second chamber 313. The limiting block 32 is threadedly fixed with the side wall of the second chamber 313, and one side surface of the limiting block 32 close to the first chamber 311 abuts against the bottom wall of the second chamber 313. The limiting block 32 makes the first chamber 311 and the second chamber 313 not communicate. An inlet port 312 and an outlet port 314 are also arranged on the valve body 31. The inlet port 312 is communicated and arranged with the first chamber 311, and the outlet port 314 is communicated and arranged with the second chamber 313.

[0040] A first cavity 321 and a second cavity 325 are also formed in the limiting block 32. The first cavity 321 is located in the first cavity 311, and the second cavity 325 is located in the second cavity 313. The first cavity 321 is connected to the first cavity 311, and the second cavity 325 is connected to the second cavity 313. A connecting hole 324 is provided on the side of the first cavity 321 close to the second cavity 325, and the connecting hole 324 connects the first cavity 321 and the second cavity 325. A first conical surface 322 is formed on one side of the side wall of the first cavity 321 close to the second cavity 325. The axial direction of the first conical surface 322 is parallel to the axial direction of the limiting block 32. The first conical surface 322 is set to shrink from the side away from the second cavity 325 to the side close to the second cavity 325.

[0041] A sealing member is also provided in the first cavity 321, and the sealing member is a steel ball 33, and the diameter of the steel ball 33 is larger than the diameter of the connecting hole 324. A driving device 4 and a resetting device 5 are respectively provided at both ends of the steel ball 33 along the axis direction of the limit block 32. The driving device 4 is provided on the side of the second cavity 325 away from the first cavity 321. The resetting device 5 is provided in the first cavity 321. The resetting device 5 pushes the steel ball 33 to press against the first conical surface 322, so that the first cavity 321 and the second cavity 325 are not connected. The driving device 4 pushes the steel ball 33 to move to the side away from the first conical surface 322, so that the first cavity 321 and the second cavity 325 are connected.

[0042] The driving device 4 includes a sliding block 41, on which a sealing gasket 413 is sleeved. The sealing gasket 413 is embedded in the side wall of the sliding block 41, and the outer side of the sealing gasket 413 is pressed against the side wall of the second cavity 325 along the radial direction of the sliding block 41. The sliding block 41 is slidably matched with the second cavity 325 along the axial direction of the limit block 32. A top block 411 is formed on one side of the sliding block 41 close to the first cavity 321. The top block 411 passes through the connecting hole 324 along the axis of the limit block 32, and the diameter of the top block 411 is smaller than the diameter of the connecting hole 324. One end of the top block 411 facing away from the sliding block 41 is pressed against the steel ball 33.

[0043] A conical groove 412 is formed on the end of the sliding block 41 away from the top block 411, and the axial direction of the conical groove 412 is parallel to the axial direction of the limit block 32. The conical groove 412 is set to shrink along the side away from the top block 411 to the side close to the top block 411. An abutting block 42 is also provided on the side of the sliding block 41 away from the first cavity 321, and a spherical block 421 is formed on the side of the abutting block 42 close to the sliding block 41, and the spherical block 421 is pressed against the conical groove 412. An adjusting block 44 is also provided on the side of the abutting block 42 away from the sliding block 41. A compression spring 43 is provided between the adjusting block 44 and the abutting block 42, and the compression spring 43 is coaxially arranged with the limit block 32. The two ends of the compression spring 43 in the axial direction are respectively pressed against the side surfaces of the adjusting block 44 and the abutting block 42 that are close to each other.

[0044] On the side of the adjusting block 44 facing away from the abutting block 42, an adjusting bolt 45 is further provided. The end of the adjusting bolt 45 is rotatably connected to the adjusting block 44. The adjusting bolt 45 passes through the limiting block 32 along its own axis direction and is coaxially arranged with the limiting block 32. The adjusting bolt 45 is threadedly connected to the limiting block 32. During use, the staff can tighten or loosen the adjusting bolt 45 to change the compression amount of the compression spring 43, thereby changing the pre-tightening force of the compression spring 43. The compression spring 43 applies a thrust to the steel ball 33 through the abutting block 42 and the sliding block 41, so that the steel ball 33 moves to the side away from the second cavity 325, and the first cavity 321 and the second cavity 325 are communicated. The hydraulic oil enters the first chamber 311 from the liquid inlet 312, enters the communication hole 324 through the first cavity 321, enters the second cavity 325, and then flows out from the liquid outlet 314 through the second chamber 313.

[0045] On the one hand, the steel ball 33 is subjected to the thrust applied by the compression spring 43 through the abutting block 42 and the sliding block 41, and on the other hand, it is subjected to the hydraulic oil pressure in the first cavity 321. When the thrust is greater than the pressure, the steel ball 33 moves to the side away from the second cavity 325, and the first cavity 321 and the second cavity 325 are communicated. When the pressure in the second cavity 325 reaches the set value, the thrust applied by the spring and the hydraulic oil pressure received by the steel ball 33 reach equilibrium, and the steel ball 33 is stable at a certain position in the first cavity 321, and the opening degree of the communication hole 324 remains constant. Therefore, the pressure of the hydraulic oil output from the liquid outlet 314 is constant at the set value. At the same time, during the working process, when the hydraulic oil pressure in the first cavity 321 changes, the steel ball 33 will automatically adjust its position according to the pressure change, thereby changing the opening degree of the communication hole 324 and restoring the pressure of the hydraulic oil output from the liquid outlet 314 to the set value.

[0046] The reset device 5 includes a fixed block 51. The fixed block 51 is located on the side of the first cavity 321 facing away from the second cavity 325, and the fixed block 51 and the limiting block 32 are fixedly connected by threads. A sliding groove 511 is opened on the fixed block. The sliding groove 511 penetrates the fixed block 51 from the side close to the second cavity 325 inward along the axis direction of the limiting block 32. A pushing block 52 is arranged in the sliding groove 511. The pushing block 52 is slidably matched with the fixed block 51 along the depth direction of the sliding groove 511. An embedding groove 521 is further opened on the pushing block 52. The embedding groove 521 penetrates the pushing block 52 from the side away from the second cavity 325 inward along the axis direction of the limiting block 32. A reset spring 53 is arranged in the embedding groove 521. The two ends of the reset spring 53 are respectively abutted against the bottom wall of the sliding groove 511 and the bottom wall of the embedding groove 521. The embedding groove 521 is communicated with the first cavity 321. In actual work, the communication between the embedding groove 521 and the first cavity 321 helps to ensure the balance of the liquid pressure inside and outside the pushing block 52, so that the pressure applied by the pushing block 52 on the steel ball 33 is equal to the elastic force of the reset spring 53.

[0047] On one side of the pushing block 52 close to the steel ball 33, a second conical surface 522 is also formed. The second conical surface 522 and the first conical surface 322 are symmetrically arranged, and the second conical surface 522 abuts against the surface of the steel ball 33. The first conical surface 322 and the second conical surface 522 help to ensure the relative position of the steel ball 33 between the pushing block 52 and the first cavity 321, and ensure the sealing performance between the first cavity 321 and the second cavity 325.

[0048] A filter screen 34 is also sleeved on the outer side of one end of the adjusting block 44 close to the first cavity 321. The filter screen 34 is arranged in the first chamber 311. A liquid inlet hole 323 is formed on the limiting block 32. The liquid inlet hole 323 communicates the first chamber 311 and the first cavity 321. The axial direction of the liquid inlet hole 323 is parallel to the radial direction of the limiting block 32, and a plurality of liquid inlet holes 323 are evenly arranged around the axis of the limiting block 32. The filter screen 34 covers the outside of the liquid inlet hole 323. The filter screen 34 helps to effectively filter impurities in the hydraulic oil entering the first cavity 321, avoid contamination inside the non-leakage pressure reducing valve 3, extend the service life of the non-leakage pressure reducing valve 3, and ensure the stability and reliability of the hydraulic system.

[0049] The liquid inlet 312, the first chamber 311, the liquid inlet hole 323, the first cavity 321, the communication hole 324, the second cavity 325, the second chamber 313 and the liquid outlet 314 are all included in the oil supply pipeline.

[0050] See Figure 2 、 Figure 3 On the multi-way joint 14, a digital display pressure master gauge 6 is also connected and set. The digital display pressure master gauge 6 is fixed on the box body 1. An electric control device 16 is also arranged inside the box body 1. The electric control device 16 includes an electric control box, and the electric control box is fixed between the box body 1 and the accumulator 15. A three-phase alternating current of 220V is electrically connected to the electric control box. The digital display pressure master gauge 6 includes a pressure controller, a relay and a contactor that are electrically connected to each other. The pressure controller is used to monitor the pressure of the hydraulic oil connected to the multi-way joint 14 in real time. When the pressure reaches the set upper limit value or lower limit value, the controller will send a stop or start signal, the relay is turned on or off, controlling the contactor to be energized or de-energized, and then controlling the start or stop of the motor 12.

[0051] A pressure display master gauge 8 is also connected and set on the multi-way joint 14. The pressure display master gauge 8 is fixed on the box body 1. A pressure display sub-gauge 9 is also connected and set on the liquid outlet 314 of any non-leakage pressure reducing valve 3. The pressure display sub-gauge 9 is also fixed on the box body 1. A digital display pressure sub-gauge 7 is also connected and set at one end of any oil supply pipeline close to the oil supply joint 21. The digital display pressure sub-gauge 7 is fixed on the box body 1.

[0052] An overflow valve is also connected between the output end of the vane pump 13 and the multi-way joint 14, and the overflow port of the overflow valve is connected to the fuel tank 11.

[0053] The reversing valve 17 is a four-way electromagnetic reversing valve 17, and the solenoid valve of the electromagnetic reversing valve 17 is arranged on the fixture or the working machine. The oil supply pipeline or the oil return pipeline on the reversing valve 17 is controlled to be opened or closed according to the actual situation.

[0054] The implementation principle of an energy storage and energy-saving type square box hydraulic station in an embodiment of the present application is as follows: In actual use, the staff connects the fixture or the working machine to a group of oil supply joints 21 and oil return joints 22, and controls the connection of the oil supply pipeline by controlling the reversing valve 17. At this time, the digital display pressure total meter 6 detects that the hydraulic oil pressure at the multi-way joint 14 is less than the set value, and the electronic control device 16 controls the motor 12 to start, and the motor 12 drives the vane pump 13 to work. The vane pump 13 inputs hydraulic oil into the oil circuit block 2. The staff adjusts the pre-tightening force of the compression spring 43 in the leak-free pressure reducing valve 3 by tightening or loosening the adjusting bolt 45. When the elastic force of the compression spring 43 is greater than the hydraulic oil pressure flowing into the first cavity 321, the sliding block 41 moves along the axial direction of the limiting block 32 towards the side close to the steel ball 33, and the top block 411 pushes the steel ball 33 towards the side away from the first conical surface 322, so that the first cavity 321 and the second cavity 325 are connected. The hydraulic oil in the first cavity 321 flows into the second cavity 325 through the communication hole 324, then flows out through the second chamber 313 and the liquid outlet 314, and then flows into the fixture or the working machine through the oil supply joint 21. At the same time, the hydraulic oil flowing out of the liquid outlet 314 will contact the pressure sensors of the digital display pressure sub-meter 7 and the pressure display sub-meter 9, so that the pressure values are displayed on the digital display pressure sub-meter 7 and the pressure display sub-meter 9, which is convenient for the staff to monitor the hydraulic oil pressure in the fixture or the working machine in real time.

[0055] The digital display pressure total meter 6 monitors the hydraulic oil pressure at the connection between the vane pump 13 and the multi-way joint 14 in real time. When the pressure reaches the set upper limit value or lower limit value, the electronic control device 16 will control the start and stop of the vane pump 13. At the same time, when the hydraulic pressure is high or the flow rate at the output end of the vane pump 13 is too large, a part of the hydraulic oil will flow into the hydraulic chamber of the accumulator 15 through the multi-way joint 14 to store energy. When the hydraulic oil pressure in the oil supply pipeline drops or the hydraulic demand of the working machine suddenly increases, the accumulator 15 will release the energy stored inside. In this way, the hydraulic pressure in the oil supply pipeline is maintained.

[0056] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An energy storage energy-saving square box hydraulic station, characterized in that: The invention comprises an oil tank (11) and an energy storage tank, wherein a vane pump (13) is arranged on the oil tank (11), a motor (12) is arranged on the vane pump (13), the vane pump (13) is drivingly connected to the motor (12), an input end of the vane pump (13) is connected to the oil tank (11), and a multi-way connector (14) is connected to the output end of the vane pump (13), an oil circuit block (2) is also fixed on the oil tank (11), the oil circuit block (2) is connected to the multi-way connector (14), a non-leakage pressure reducing valve (3) and a reversing valve (17) are also connected to the oil circuit block (2), and a plurality of groups of the non-leakage pressure reducing valve (3) and the reversing valve (17) are correspondingly arranged on the oil circuit block (2), and the oil tank (11), the oil circuit block (2) and any An oil supply pipeline and an oil return pipeline are formed between a set of non-leakage pressure reducing valves (3) and a reversing valve (17); an oil supply connector (21) and an oil return connector (22) are provided on the oil circuit block (2); a plurality of the oil supply connectors (21) are connected to the oil supply pipeline, and a plurality of the oil return connectors (22) are connected to the oil return pipeline; a digital pressure gauge (6) is also connected to the multi-way connector (14); an accumulator (15) is also provided in the energy storage box; the multi-way connector (14) is connected to the accumulator (15); an electric control device (16) is connected to the accumulator (15); the electric control device (16) is connected to the digital pressure gauge (6) in an electric communication manner; and the electric control device (16) is connected to the motor (12) in an electric communication manner.

2. The energy storage energy-saving square box hydraulic station according to claim 1 is characterized in that: Any of the non-leakage pressure reducing valves (3) comprises a valve body (31) and a stop block (32), wherein a hydraulic cavity is arranged in the valve body (31), and the stop block (32) is embedded in the hydraulic cavity to divide the hydraulic cavity into a first cavity (311) and a second cavity (313), wherein the first cavity (311) is not connected to the second cavity (313), and the valve body (31) is further provided with a liquid inlet (312) and a liquid outlet (314), wherein the liquid inlet (312) is connected to the first cavity (311), and the liquid outlet (314) is connected to the second cavity (313), and the stop block (32) is further provided with a first cavity (321) and a second cavity (325), wherein the first cavity (321) and the second cavity (325) are connected to the first cavity (311). A connecting hole (324) is provided between the cavity (321) and the second cavity (325); the first cavity (321) is connected to the first chamber (311); the second cavity (325) is connected to the second chamber (313); a sealing member is also provided in the first cavity (321); when the sealing member is pressed against a side of the connecting hole (324) facing away from the second cavity (325), the first cavity (321) and the second cavity (325) are not connected; a driving device (4) is provided in the first cavity (321) for driving the sealing member to move away from the second cavity (325); and a resetting device (5) is also provided in the second cavity (325) for driving the sealing member to return to its original position.

3. The energy storage energy-saving square box hydraulic station according to claim 2 is characterized in that: Any of the driving devices (4) comprises a sliding block (41), wherein the sliding block (41) slides in the second cavity (325) along the length direction of the limit block (32), a sealing gasket (413) is sleeved on the sliding block (41), the sealing gasket (413) is embedded in the sliding block (41), the peripheral side surface of the sealing gasket (413) is pressed against the inner wall of the second cavity (325), a top block (411) is arranged at one end of the sliding block (41) close to the sealing member, the top block (411) passes through the connecting hole (324), an end of the top block (411) facing away from the sliding block (41) is pressed against the sealing member, and a compression spring (43) is arranged at one end of the sliding block (41) facing away from the top block (411).

4. The energy storage energy-saving square box hydraulic station according to claim 3 is characterized in that: A contact block (42) and an adjustment block (44) are also provided in any of the limit blocks (32); the contact block (42) is located at one end of the sliding block (41) away from the top block (411); two sides of the compression spring (43) in the axial direction respectively contact the side surfaces of the contact block (42) and the adjustment block (44) close to each other; an adjustment bolt (45) is also provided at one end of the adjustment block (44) away from the contact block (42); the axial direction of the adjustment bolt (45) is parallel to the length direction of the limit block (32); the adjustment bolt (45) passes through the side wall of the limit block (32) along its own axial direction and is threadedly connected to the limit block (32).

5. The energy storage energy-saving square box hydraulic station according to claim 4 is characterized in that: A conical groove (412) is provided at one end of any of the sliding blocks (41) away from the top block (411); the axial direction of the conical groove (412) is parallel to the sliding direction of the sliding block (41); the conical groove (412) is arranged to contract along a side close to the abutment block (42) toward a side close to the top block (411); a spherical block (421) is fixed to a side of the abutment block (42) close to the sliding block (41); the spherical block (421) is tightly pressed into the conical groove (412).

6. The energy storage energy-saving square box hydraulic station according to claim 4 is characterized in that: Any of the sealing components is a steel ball, and a first conical surface (322) is formed on the bottom wall of the first cavity (321) close to the second cavity (325) along the length direction of the limit block (32), the axial direction of the first conical surface (322) is parallel to the length direction of the limit block (32), and the first conical surface (322) is contracted along a side away from the second cavity (325) toward a side close to the second cavity (325), and the connecting hole (324) is opened on the conical surface, the connecting hole (324) is coaxially arranged with the conical surface, and the diameter of the connecting hole (324) is smaller than the diameter of the steel ball.

7. The energy storage energy-saving square box hydraulic station according to claim 2 is characterized in that: Any of the reset devices (5) comprises a fixed block (51), the fixed block (51) being located on a side of the first cavity (321) away from the second cavity (325), the fixed block (51) being provided with a sliding groove (511), the sliding groove (511) penetrating the fixed block (51) inwardly along a side close to the first cavity (321), the fixed block (51) being provided with a push block (52), the push block (52) being arranged in the sliding groove (511), and the push block (52) being arranged in a depth direction thereof. The push block (52) is also provided with an embedding groove (521), and the embedding groove (521) penetrates the push block (52) from a side close to the fixed block (51) to a side away from the fixed block (51), and the embedding groove (521) is connected to the first cavity (321). A return spring (53) is provided in the embedding groove (521), and two ends of the return spring (53) are respectively pressed against the bottom wall of the sliding groove (511) and the bottom wall of the embedding groove (521).

8. The energy-storage energy-saving square box hydraulic station according to claim 7 is characterized in that: A filter screen (34) is also provided outside any of the limit blocks (32), the filter screen (34) is arranged in the first chamber (311), a liquid inlet hole (323) is provided on the limit block (32), the liquid inlet hole (323) connects the first cavity (321) and the first chamber (311), a plurality of liquid inlet holes (323) are evenly spaced around the axis direction of the limit block (32), and the filter screen (34) is arranged outside the liquid inlet hole (323).

9. The energy storage energy-saving square box hydraulic station according to claim 1 is characterized in that: A pressure display sub-meter (9) is also provided in communication between any pair of the oil supply pipelines and the oil supply connectors (21).

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