An intelligent energy-saving hydraulic power system

Abstract

The present invention discloses an intelligent energy-saving hydraulic power system, comprising an oil tank, an output oil cylinder, an oil pump, and an oil pump motor. An oil tank air cavity is formed above the hydraulic oil in the oil tank. A hydraulic oil output port and a hydraulic oil input port are provided at the bottom of the oil tank. A compressed air input port connected to the oil tank air cavity is provided at the top of the oil tank. The hydraulic oil output port of the oil tank is connected to the oil inlet of the oil pump via an oil pipeline. The oil outlet of the oil pump is connected to a first oil pipeline and a second oil pipeline respectively. The first oil pipeline is connected to the output oil cylinder, and a first solenoid valve is provided on the first oil pipeline. The second oil pipeline is connected to an electromagnetic reversing valve. The electromagnetic reversing valve is connected to the hydraulic oil input port of the oil tank and the hydraulic gas compression cylinder via an oil pipeline. The compressed air outlet of the hydraulic gas compression cylinder is connected to the compressed air input port of the oil tank. The output oil cylinder is connected to an oil return pipeline, and a second solenoid valve is provided on the oil return pipeline. The intelligent energy-saving hydraulic power system of the present invention has a good energy-saving effect.

Description

Technical Field

[0001] The invention relates to a hydraulic oil cylinder, in particular to an intelligent energy-saving hydraulic power system. Background Art

[0002] At present, the power of the known hydraulic power system is proportional to the output pressure and flow rate. The heavier the load, the greater the power consumption, so energy consumption cannot be saved. Summary of the Invention

[0003] In order to overcome the defect that the existing hydraulic power system cannot save energy consumption, the present invention provides an intelligent energy-saving hydraulic power system, which can save 60%-80% energy when performing repeated lifting operations on objects of fixed mass under the same environment and working conditions.

[0004] and a control panel that is located adjacent to the control panel and has a control panel, wherein the control panel has a check valve in it and a check valve in it, and the control panel has a check valve in it, wherein the control panel has YouJiaxing is connected to the control panel, and the control panel has a check valve in it.

[0005] Furthermore, the hydraulic gas compression cylinder includes an intermediate air valve block, the upper and lower ends of the intermediate air valve block are respectively connected to the upper cylinder barrel and the lower cylinder barrel, the ends of the upper cylinder barrel and the lower cylinder barrel are closed and are respectively provided with a hydraulic oil hole I, the piston rod I passes through the intermediate air valve block and the two ends extend to the upper cylinder barrel and the lower cylinder barrel respectively, and pistons are installed at both ends of the piston rod I. The intermediate air valve block is provided with an upper air inlet valve and an upper air outlet valve connected to the upper cylinder barrel, and a lower air inlet valve and a lower air outlet valve connected to the lower cylinder barrel. The upper air outlet valve and the lower air outlet valve are connected to the compressed air inlet of the oil tank through an exhaust pipe, and the hydraulic oil holes I of the upper cylinder barrel and the lower cylinder barrel are respectively connected to the electromagnetic reversing valve through the oil pipe.

[0006] Furthermore, an oil pressure sensor is provided on the second oil pipeline, and the electromagnetic reversing valve is switched according to a signal from the oil pressure sensor.

[0007] Furthermore, the oil tank is provided with a pressure detection sensor for detecting the internal pressure of the oil tank.

[0008] Furthermore, the oil tank is provided with a safety valve.

[0009] Furthermore, after the oil tank is filled with compressed gas, the initial output force of the hydraulic oil is less than or equal to the weight of the working object.

[0010] Furthermore, the change in volume between the original volume of the gas space in the oil tank and the volume of the gas space in the oil tank after the piston rod of the output oil cylinder is extended is controlled within 10%.

[0011] Furthermore, it also includes a pressure conversion cylinder, which includes a large cylinder, a small cylinder, an intermediate block, a piston rod II, a large piston, and a small piston. The large cylinder and the small cylinder are connected by an intermediate block. The ends of the large cylinder and the small cylinder are closed and are both provided with a hydraulic oil hole II. One end of the piston rod II is located in the large cylinder and connected to the large piston, and the other end of the piston rod II is located in the small cylinder and connected to the small piston. A vent is provided on the intermediate block. The hydraulic oil hole at the large cylinder end is connected to the oil tank through an oil pipe, and the hydraulic oil hole at the small cylinder end is connected to the output oil cylinder through an oil pipe, and a third solenoid valve is provided on the oil pipe.

[0012] The intelligent energy-saving hydraulic power system of the present invention utilizes the large compression ratio of gas to add a certain amount of hydraulic oil into the oil tank as the power medium output, leaving most of the gas space, and fills the oil tank with gas of a certain pressure through the hydraulic gas compression cylinder, so that the initial output force of the hydraulic oil in the oil tank is less than or equal to the weight of the working object, so that the weight of the object is basically offset by the initial output force of the pre-filled hydraulic oil. When performing lifting work, the hydraulic power system only needs a very small output force to overcome the friction of the piston rod and the piston, and the changing force caused by the change in gas pressure caused by the change in the volume of the hydraulic oil in the oil tank; the ratio of the original gas volume in the oil tank to the changed volume during work is controlled within 10%, and energy saving can reach about 60%-80%. The smaller the ratio of the original volume of the gas space in the oil tank to the changed volume of the gas space in the oil tank after the cylinder piston rod is extended, the better; when in use, the gas is pre-filled once and does not need to be continuously inflated. If there is a leak, it can be automatically replenished, and no exhaust gas is discharged, which is beneficial to environmental protection; by setting a pressure conversion cylinder, the oil flow can be greatly increased, and the output oil cylinder can be quickly raised. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 It is a structural schematic diagram of the hydraulic gas compression cylinder of the present invention.

[0015] Figure 3 It is a structural schematic diagram of the pressure conversion cylinder of the present invention. DETAILED DESCRIPTION

[0016] To facilitate understanding of the present invention, the present invention will be described in more comprehensive and detailed form below in conjunction with the accompanying drawings and preferred embodiments. However, the protection scope of the present invention is not limited to the following specific embodiments.

[0017] like Figure 1-Figure 3 As shown, an intelligent energy-saving hydraulic power system of this embodiment includes an oil tank 100, an output oil cylinder 200, an oil pump 300 and an oil pump motor 400, an electromagnetic reversing valve 600, a hydraulic gas compression cylinder 700, an oil pressure sensor 800, and a pressure conversion cylinder 900.

[0018] The oil tank 100 is manufactured according to medium-pressure oil tank standards. The bottom of the oil tank 100 contains hydraulic oil, the power medium. An air chamber is formed in the upper portion of the oil tank 100. A hydraulic oil outlet and an inlet are provided at the lower portion of the oil tank 100. A compressed air inlet is provided at the upper portion of the oil tank 100, communicating with the air chamber. A pressure sensor is provided on the oil tank 100 to detect the internal pressure of the oil tank 100. By monitoring changes in the internal pressure of the oil tank, the pressure of the oil tank is controlled. A safety valve is also provided on the oil tank 100 to ensure that the internal pressure of the oil tank does not exceed the design pressure.

[0019] The hydraulic oil output port of the oil tank 100 is connected to the oil inlet of the oil pump 300 through an oil pipeline. The oil outlet of the oil pump 300 is respectively connected to a first oil pipeline and a second oil pipeline. The first oil pipeline is connected to the output oil cylinder 200, and a first solenoid valve 501 is provided on the first oil pipeline. The second oil pipeline is connected to an electromagnetic reversing valve 600. The electromagnetic reversing valve 600 is respectively connected to the hydraulic oil input port of the oil tank and the hydraulic gas compression cylinder 700 through the oil pipeline. The compressed air discharge port of the hydraulic gas compression cylinder 700 is connected to the compressed air input port of the oil tank. The output oil cylinder 200 is connected to a return oil pipeline, and a second solenoid valve 502 is provided on the return oil pipeline.

[0020] like Figure 2As shown, the hydraulic gas compression cylinder 700 includes an intermediate gas valve block 701, and the upper and lower ends of the intermediate gas valve block 701 are respectively connected to the upper cylinder barrel 702 and the lower cylinder barrel 703. The ends of the upper cylinder barrel 702 and the lower cylinder barrel 703 are closed and are each provided with a hydraulic oil hole I 704. The piston rod I 705 passes through the intermediate gas valve block 701 and extends to the upper cylinder barrel 702 and the lower cylinder barrel 703 at both ends. Pistons 70 are installed at both ends of the piston rod I 705. 6. The intermediate air valve block 701 is equipped with an upper air inlet valve 707 and an upper air outlet valve 708 communicating with the upper cylinder 702, as well as a lower air inlet valve 709 and a lower air outlet valve 710 communicating with the lower cylinder 703. The upper and lower air outlet valves 708 and 710 are connected to the compressed air inlet of the oil tank via an exhaust pipe. The hydraulic oil ports I 704 of the upper and lower cylinders 702 and 703 are connected to the solenoid reversing valve 600 via oil delivery pipes. The second oil pipeline is equipped with an oil pressure sensor 800, and the solenoid reversing valve 600 switches according to the signal from the oil pressure sensor 800.

[0021] like Figure 3 As shown, the pressure conversion cylinder 900 includes a large cylinder 901, a small cylinder 902, an intermediate block 903, a piston rod II 904, a large piston 905, and a small piston 906. The large cylinder 901 and the small cylinder 902 are connected via the intermediate block 903. The ends of the large cylinder 901 and the small cylinder 902 are closed and are both provided with a hydraulic oil hole II 907. One end of the piston rod II 904 is located in the large cylinder 901 and is connected to the large piston 905, and the other end of the piston rod II 904 is located in the small cylinder 902 and is connected to the small piston 906. A vent 908 is provided on the intermediate block 903. The hydraulic oil hole at the end of the large cylinder 901 is connected to the oil tank 100 through an oil pipe, and the hydraulic oil hole at the end of the small cylinder 902 is connected to the output cylinder 200 through an oil pipe, and a third solenoid valve 503 is provided on the oil pipe.

[0022] After the oil tank is filled with compressed gas, the initial output force of the hydraulic oil is less than or equal to the weight of the workpiece. The change in the original volume of the gas space in the oil tank 100 and the volume of the gas space in the oil tank 100 after the piston rod of the output oil cylinder 200 is extended is controlled within 10%.

[0023] The working process of the intelligent energy-saving hydraulic power system of the present invention is as follows: after the oil tank 100 is filled with oil, the first solenoid valve 501, the second solenoid valve 502, and the third solenoid valve 503 are all closed, the oil pump motor 400 is started, and the hydraulic oil passes through the second oil pipe and the solenoid reversing valve 600 to the hydraulic gas compression cylinder 700, and the hydraulic oil hole I at the upper end of the hydraulic gas compression cylinder 700 is filled with oil, the piston rod I 705 moves downward, the upper outlet valve 708 is opened, the upper inlet valve 707 is closed, and the hydraulic gas compression Cylinder 700's upper cylinder barrel 702 compresses air, returning oil to its lower hydraulic oil port I. Lower inlet valve 709 opens, and lower outlet valve 710 closes. Oil pressure sensor 800 detects the oil pressure and controls solenoid reversing valve 600 to switch the oil circuit. Oil returns from upper hydraulic oil port I of hydraulic gas compression cylinder 700, while oil enters lower hydraulic oil port I. This reciprocating cycle discharges compressed air into the oil tank. Once the tank is fully inflated, solenoid reversing valve 600 closes. Once the tank is pressurized, operation can begin. The oil pump motor 400 operates, opening the first solenoid valve 501. When the output cylinder 200 is fully extended and the pressure rises, the first solenoid valve 501 closes, stopping the oil pump motor 400. To lower the cylinder, simply open the second solenoid valve 502 to release the hydraulic oil in the output cylinder 200 back into the tank.

[0024] When rapid lifting is required, the oil pump motor 400 is started and the third solenoid valve 503 is opened at the same time. The hydraulic oil is injected into the pressure conversion cylinder 900 under the action of the oil tank air pressure, and the hydraulic oil in the small cylinder 902 of the pressure conversion cylinder 900 enters the output cylinder 200, so that the flow of high-pressure oil injected into the output cylinder 200 is greatly increased, and the output cylinder 200 can be rapidly lifted. After the output cylinder 200 is fully lifted, the oil pump motor 400 continues to pressurize and injects the hydraulic oil into the small cylinder 902 of the pressure conversion cylinder 900. The piston rod II 904 is reset, and then the first solenoid valve 501 and the third solenoid valve 503 are closed, and the oil pump motor 400 is turned off to complete the rapid function.

[0025] Numerous modifications and other embodiments of the present invention will occur to those skilled in the art with the aid of the teachings presented in the foregoing description and the associated drawings. Therefore, it is to be understood that the invention is not limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. An intelligent energy-saving hydraulic power system, comprising an oil tank (100), an output oil cylinder (200), an oil pump (300) and an oil pump motor (400), characterized in that: The oil tank (100) is used to store hydraulic oil, and an oil tank air cavity is formed above the hydraulic oil. A hydraulic oil output port and a hydraulic oil input port are provided at the lower portion of the oil tank (100), and a compressed air input port connected to the oil tank air cavity is provided at the upper portion of the oil tank (100). The hydraulic oil output port of the oil tank (100) is connected to the oil inlet of the oil pump (300) through an oil delivery pipe. The oil outlet of the oil pump (300) is connected to a first oil pipe and a second oil pipe respectively. The first oil pipe is connected to the output oil cylinder (200). The first oil pipeline is connected, and a first solenoid valve (501) is provided on the second oil pipeline. The second oil pipeline is connected to the solenoid reversing valve (600). The solenoid reversing valve (600) is connected to the hydraulic oil input port of the oil tank and the hydraulic gas compression cylinder (700) through the oil pipeline. The compressed air discharge port of the hydraulic gas compression cylinder (700) is connected to the compressed air input port of the oil tank. The output oil cylinder (200) is connected to the oil return pipeline, and the second solenoid valve (502) is provided on the oil return pipeline. The hydraulic gas compression cylinder (700) includes an intermediate gas valve block (701), wherein the upper and lower ends of the intermediate gas valve block (701) are respectively connected to an upper cylinder barrel (702) and a lower cylinder barrel (703), the ends of the upper cylinder barrel (702) and the lower cylinder barrel (703) are closed and are both provided with a hydraulic oil hole I (704), a piston rod I (705) passes through the intermediate gas valve block (701) and its two ends extend to the upper cylinder barrel (702) and the lower cylinder barrel (703), respectively, and pistons (706) are installed at both ends of the piston rod I (705). ), the intermediate air valve block (701) is provided with an upper air inlet valve (707) and an upper air outlet valve (708) communicating with the upper cylinder (702), and a lower air inlet valve (709) and a lower air outlet valve (710) communicating with the lower cylinder (703); the upper air outlet valve (708) and the lower air outlet valve (710) are connected to the compressed air input port of the oil tank through an exhaust pipe, and the hydraulic oil hole I (704) of the upper cylinder (702) and the lower cylinder (703) are respectively connected to the electromagnetic reversing valve (600) through an oil delivery pipe; The pressure conversion cylinder (900) is further comprised of a large cylinder barrel (901), a small cylinder barrel (902), an intermediate block (903), a piston rod II (904), a large piston (905), and a small piston (906). The large cylinder barrel (901) and the small cylinder barrel (902) are connected via the intermediate block (903). The ends of the large cylinder barrel (901) and the small cylinder barrel (902) are closed and are both provided with a hydraulic oil hole II (907). The piston rod II (904) is The end of the piston rod II (904) is located in the large cylinder (901) and is connected to the large piston (905), the other end of the piston rod II (904) is located in the small cylinder (902) and is connected to the small piston (906), the intermediate block (903) is provided with a vent hole (908), the hydraulic oil hole at the end of the large cylinder (901) is connected to the oil tank (100) through an oil pipeline, the hydraulic oil hole at the end of the small cylinder (902) is connected to the output oil cylinder (200) through an oil pipeline, and a third solenoid valve (503) is provided on the oil pipeline; After the oil tank is filled with compressed gas, the initial output force of the hydraulic oil is less than or equal to the weight of the working object.

2. The intelligent energy-saving hydraulic power system according to claim 1, characterized in that: An oil pressure sensor (800) is provided on the second oil pipeline, and the electromagnetic reversing valve (600) is switched according to a signal from the oil pressure sensor (800).

3. The intelligent energy-saving hydraulic power system according to claim 1, characterized in that: The oil tank (100) is provided with a pressure detection sensor for detecting the internal pressure of the oil tank (100).

4. The intelligent energy-saving hydraulic power system according to claim 1, characterized in that: The oil tank (100) is provided with a safety valve.

5. The intelligent energy-saving hydraulic power system according to claim 1, characterized in that: The change in the original volume of the gas space in the oil tank (100) and the volume of the gas space in the oil tank (100) after the piston rod of the output oil cylinder (200) is extended is controlled within 10%.

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