Speed-controllable energy-saving hydraulic pumping unit

Abstract

The utility model relates to the technical field of hydraulic pumping units, in particular to a speed-controllable energy-saving hydraulic pumping unit which comprises an auxiliary motor, a plunger pump is mounted on the right side of the auxiliary motor, and the output end of the plunger pump is communicated with a servo hydraulic cylinder through a pipeline. The servo motor drives the bidirectional hydraulic pump to work, the bidirectional hydraulic pump provides hydraulic oil for the servo hydraulic cylinder, the auxiliary motor drives the plunger pump to work, and the plunger pump pressurizes the hydraulic oil in the servo hydraulic cylinder, so that the servo hydraulic cylinder works. Meanwhile, the flowing proportion of hydraulic oil is controlled through a first servo proportional valve and a second servo proportional valve, when the air pressure in a pipeline of the device is too high, pressure relief can be conducted through a first pressure relief valve and a second pressure relief valve, and the situation that the pipeline is damaged due to the too high air pressure can be effectively prevented; and meanwhile, the pressure of the hydraulic oil is controlled through the second electromagnetic overflow valve and the first electromagnetic overflow valve.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic pumping unit technology, specifically a speed-controllable and energy-saving hydraulic pumping unit. Background Technology

[0002] Hydraulic presses typically require the use of hydraulic pumping units during operation.

[0003] A search revealed that the announcement number is CN220268061U, and the name is "A Speed ​​Transmission Energy-Saving Device for a Bending Machine". It includes a servo motor, an oil pump, a valve group, two servo proportional valves, and two oil cylinders. Through research and analysis, it was found that although it has the advantages of the servo system's rapid tracking of pressure and flow, ensuring consistent oil supply to the two oil cylinders and consistent piston descent, thereby ensuring bending accuracy, it also has the following disadvantages to a certain extent.

[0004] For example, the device has low transmission efficiency during use, which makes it difficult to achieve energy saving. Due to its large size and weight, it is inconvenient to transport, install, maintain and adjust parameters, resulting in high overall investment costs. In order to solve the above technical problems, we have designed a speed-controllable and energy-saving hydraulic pumping unit. Utility Model Content

[0005] The purpose of this utility model is to provide a controllable speed and energy-saving hydraulic pumping unit, which has the advantages of simple structure, low failure rate, small size and easy relocation. It solves the problems of low transmission efficiency, inability to achieve better energy saving, large size and heavy weight, inconvenience in transportation, installation, maintenance and parameter adjustment, and high overall investment cost of the equipment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a controllable speed and energy-saving hydraulic pumping unit, comprising an auxiliary motor, a plunger pump mounted on the right side of the auxiliary motor, the output end of the plunger pump being connected to a servo hydraulic cylinder via a pipe, the output end of the plunger pump being connected to a first electromagnetic ball valve and a second electromagnetic ball valve via pipes respectively, the output ends of the first electromagnetic ball valve and the second electromagnetic ball valve being connected to the servo hydraulic cylinder via pipes, a pressure gauge being connected to the surface of the servo hydraulic cylinder via a pipe, a servo motor being mounted at the bottom of the auxiliary motor, a bidirectional hydraulic pump being mounted at the top of the servo motor, a first servo proportional valve being connected to the left side of the bidirectional hydraulic pump via a pipe, the right side of the first servo proportional valve being connected to the servo hydraulic cylinder via a pipe, a second servo proportional valve being connected to the right side of the bidirectional hydraulic pump via a pipe, and the left side of the second servo proportional valve being connected to the servo hydraulic cylinder via a pipe.

[0007] Preferably, a first electromagnetic ball valve and a second electromagnetic ball valve are respectively installed on the surface of the connecting pipe between the plunger pump and the servo hydraulic cylinder, and the output end of the plunger pump is connected to the first electromagnetic ball valve and the second electromagnetic ball valve through the pipe.

[0008] Preferably, the bottom of the first electromagnetic ball valve is connected to the servo hydraulic cylinder via a pipe, and the bottom of the second electromagnetic ball valve is also connected to the servo hydraulic cylinder via a pipe.

[0009] Preferably, a pressure gauge is connected to the surface of the servo hydraulic cylinder via a pipe, and a connecting plate is welded to the surface of the servo hydraulic cylinder.

[0010] Preferably, a first pressure relief valve is installed on the surface of the pipe connecting the left side of the bidirectional hydraulic pump to the first servo proportional valve, and a second electromagnetic relief valve is installed on the surface of the pipe connecting the right side of the first servo proportional valve to the servo hydraulic cylinder.

[0011] Preferably, a second pressure relief valve is installed on the surface of the pipe connecting the right side of the bidirectional hydraulic pump to the second servo proportional valve, and a first electromagnetic relief valve is installed on the surface of the pipe connecting the left side of the second servo proportional valve to the servo hydraulic cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model uses a servo motor to drive a bidirectional hydraulic pump to work, which provides hydraulic oil to the servo hydraulic cylinder. At the same time, an auxiliary motor drives a plunger pump to work, which pressurizes the hydraulic oil in the servo hydraulic cylinder, enabling the servo hydraulic cylinder to work. Meanwhile, the flow ratio of the hydraulic oil is controlled by a first servo proportional valve and a second servo proportional valve, which facilitates the control of the thrust and speed of the servo hydraulic cylinder.

[0014] 2. When the air pressure in the pipeline of this utility model is too high, the pressure can be released through the first pressure relief valve and the second pressure relief valve, which can effectively prevent the pipeline from being damaged by excessive air pressure. At the same time, the hydraulic oil pressure is controlled through the second electromagnetic relief valve and the first electromagnetic relief valve. When the hydraulic oil pressure is too high, the pressure can be released through the second electromagnetic relief valve and the first electromagnetic relief valve to prevent the device from being damaged. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the working principle of this utility model.

[0016] In the diagram: 1. Auxiliary motor; 2. First solenoid ball valve; 3. Servo hydraulic cylinder; 4. Pressure gauge; 5. First servo proportional valve; 6. First solenoid relief valve; 7. First pressure relief valve; 8. Servo motor; 9. Two-way hydraulic pump; 10. Piston pump; 11. Second pressure relief valve; 12. Second solenoid relief valve; 13. Second servo proportional valve; 14. Second solenoid ball valve. Detailed Implementation

[0017] Please see Figure 1 A speed-controllable and energy-saving hydraulic pumping unit includes an auxiliary motor 1. A plunger pump 10 is installed on the right side of the auxiliary motor 1. The output end of the plunger pump 10 is connected to a servo hydraulic cylinder 3 through a pipe. The output end of the plunger pump 10 is connected to a first solenoid ball valve 2 and a second solenoid ball valve 14 through pipes. The output ends of the first solenoid ball valve 2 and the second solenoid ball valve 14 are both connected to the servo hydraulic cylinder 3 through pipes. A pressure gauge 4 is connected to the surface of the servo hydraulic cylinder 3 through a pipe. A servo motor 8 is installed at the bottom of the auxiliary motor 1. A bidirectional hydraulic pump 9 is installed at the top of the servo motor 8. A first servo proportional valve 5 is connected to the left side of the bidirectional hydraulic pump 9 through a pipe. The right side of the first servo proportional valve 5 is connected to the servo hydraulic cylinder 3 through a pipe. A second servo proportional valve 13 is connected to the right side of the bidirectional hydraulic pump 9 through a pipe. The left side of the second servo proportional valve 13 is connected to the servo hydraulic cylinder 3 through a pipe.

[0018] Please see Figure 1 The surface of the connecting pipe between the plunger pump 10 and the servo hydraulic cylinder 3 is respectively equipped with a first electromagnetic ball valve 2 and a second electromagnetic ball valve 14. The output end of the plunger pump 10 is connected to the first electromagnetic ball valve 2 and the second electromagnetic ball valve 14 through the pipe. By setting the second electromagnetic ball valve 14, it is easy to control the plunger pump 10 to pressurize the device and to control the servo hydraulic cylinder 3 to work.

[0019] Please see Figure 1 The bottom of the first electromagnetic ball valve 2 is connected to the servo hydraulic cylinder 3 through a pipe, and the bottom of the second electromagnetic ball valve 14 is connected to the servo hydraulic cylinder 3 through a pipe. By setting the first electromagnetic ball valve 2, it is easy to control the plunger pump 10 to pressurize the device and to control the servo hydraulic cylinder 3 to work.

[0020] Please see Figure 1 The surface of the servo hydraulic cylinder 3 is connected to a pressure gauge 4 via a pipe. By setting the pressure gauge 4, it is easy to detect the hydraulic oil pressure inside the servo hydraulic cylinder 3 and to effectively adjust the pressure inside the servo hydraulic cylinder 3. A connecting plate is welded to the surface of the servo hydraulic cylinder 3. By setting the connecting plate, it is easy to install the servo hydraulic cylinder 3 and to facilitate the movement of other objects by the servo hydraulic cylinder 3.

[0021] Please see Figure 1 A first pressure relief valve 7 is installed on the surface of the pipe connecting the bidirectional hydraulic pump 9 to the first servo proportional valve 5. By setting the first pressure relief valve 7, it is possible to relieve pressure when the air pressure in the pipe is too high, which can effectively prevent damage to the device pipe. A second electromagnetic relief valve 12 is installed on the surface of the pipe connecting the first servo proportional valve 5 to the servo hydraulic cylinder 3. By setting the second electromagnetic relief valve 12, it is possible to adjust the hydraulic oil pressure and relieve pressure when the hydraulic oil pressure is too high.

[0022] Please see Figure 1 A second pressure relief valve 11 is installed on the surface of the pipe connecting the right side of the bidirectional hydraulic pump 9 and the second servo proportional valve 13. By setting the second pressure relief valve 11, it is possible to relieve pressure when the air pressure in the pipe is too high, which can effectively prevent damage to the device pipe. A first electromagnetic relief valve 6 is installed on the surface of the pipe connecting the left side of the second servo proportional valve 13 and the servo hydraulic cylinder 3. By setting the first electromagnetic relief valve 6, it is possible to adjust the hydraulic oil pressure and relieve pressure when the hydraulic oil pressure is too high.

[0023] In use, the device is controlled by an external controller. The servo motor 8 drives the bidirectional hydraulic pump 9 to operate, which in turn supplies hydraulic oil to the servo hydraulic cylinder 3. Simultaneously, the auxiliary motor 1 drives the plunger pump 10 to operate, which pressurizes the hydraulic oil in the servo hydraulic cylinder 3, enabling the servo hydraulic cylinder 3 to operate. The first servo proportional valve 5 and the second servo proportional valve 13 control the flow ratio of the hydraulic oil, facilitating the control of the thrust and speed of the servo hydraulic cylinder 3. When the air pressure in the device's pipeline is too high, it can be relieved through the first pressure relief valve 7 and the second pressure relief valve 11, effectively preventing damage to the pipeline due to excessive air pressure. At the same time, the hydraulic oil pressure is controlled through the second electromagnetic relief valve 12 and the first electromagnetic relief valve 6. When the hydraulic oil pressure is too high, it can be relieved through the second electromagnetic relief valve 12 and the first electromagnetic relief valve 6 to prevent damage to the device.

[0024] In summary, this controllable speed and energy-saving hydraulic pumping unit, through the bidirectional hydraulic pump 9, plunger pump 10, second pressure relief valve 11, second electromagnetic overflow valve 12, second servo proportional valve 13, and second electromagnetic ball valve 14, solves the problems of low transmission efficiency, inability to achieve better energy saving, inconvenient transportation, installation, maintenance, and parameter adjustment due to its large size and weight, and high overall equipment investment cost.

Claims

1. A speed-controllable and energy-saving hydraulic pumping unit, comprising an auxiliary motor (1), characterized in that: A piston pump (10) is installed on the right side of the auxiliary motor (1). The output end of the piston pump (10) is connected to the servo hydraulic cylinder (3) through a pipe. The output end of the piston pump (10) is connected to the first electromagnetic ball valve (2) and the second electromagnetic ball valve (14) through pipes respectively. The output ends of the first electromagnetic ball valve (2) and the second electromagnetic ball valve (14) are both connected to the servo hydraulic cylinder (3) through pipes. The surface of the servo hydraulic cylinder (3) is connected to the pressure gauge (4) through a pipe. A servo motor (8) is installed at the bottom of the auxiliary motor (1). A bidirectional hydraulic pump (9) is installed at the top of the servo motor (8). The left side of the bidirectional hydraulic pump (9) is connected to the first servo proportional valve (5) through a pipe. The right side of the first servo proportional valve (5) is connected to the servo hydraulic cylinder (3) through a pipe. The right side of the bidirectional hydraulic pump (9) is connected to the second servo proportional valve (13) through a pipe. The left side of the second servo proportional valve (13) is connected to the servo hydraulic cylinder (3) through a pipe.

2. The speed-controllable and energy-saving hydraulic pumping unit according to claim 1, characterized in that: The surface of the connecting pipe between the plunger pump (10) and the servo hydraulic cylinder (3) is respectively equipped with a first electromagnetic ball valve (2) and a second electromagnetic ball valve (14). The output end of the plunger pump (10) is connected to the first electromagnetic ball valve (2) and the second electromagnetic ball valve (14) through the pipe.

3. The speed-controllable and energy-saving hydraulic pumping unit according to claim 2, characterized in that: The bottom of the first electromagnetic ball valve (2) is connected to the servo hydraulic cylinder (3) through a pipe, and the bottom of the second electromagnetic ball valve (14) is connected to the servo hydraulic cylinder (3) through a pipe.

4. The speed-controllable and energy-saving hydraulic pumping unit according to claim 1, characterized in that: The surface of the servo hydraulic cylinder (3) is connected to a pressure gauge (4) via a pipe, and a connecting plate is welded to the surface of the servo hydraulic cylinder (3).

5. The speed-controllable and energy-saving hydraulic pumping unit according to claim 1, characterized in that: A first pressure relief valve (7) is installed on the surface of the pipe connecting the left side of the bidirectional hydraulic pump (9) to the first servo proportional valve (5), and a second electromagnetic relief valve (12) is installed on the surface of the pipe connecting the right side of the first servo proportional valve (5) to the servo hydraulic cylinder (3).

6. The speed-controllable and energy-saving hydraulic pumping unit according to claim 1, characterized in that: A second pressure relief valve (11) is installed on the surface of the pipe connecting the right side of the bidirectional hydraulic pump (9) to the second servo proportional valve (13), and a first electromagnetic relief valve (6) is installed on the surface of the pipe connecting the left side of the second servo proportional valve (13) to the servo hydraulic cylinder (3).

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