Hydraulic power system used in explosion-proof environment

Abstract

The hydraulic power system used in the anti-explosion environment comprises an oil tank, an oil pump, a second one-way valve, a safety valve and an energy accumulator, one end of the oil pump is connected into the oil tank, the other end of the oil pump is connected with the second one-way valve in series and then connected into a main oil way P. The front end of the energy accumulator is connected between the second one-way valve and the main oil way P. The rear end of the energy accumulator is connected with the oil tank. Automatic pressure relief and pressure maintaining are achieved through linkage of the safety valve and the energy accumulator, electrical control logic is omitted, and due to the fact that the system is not provided with an electrified node, cost is low, and the energy-saving and environment-friendly pressure maintaining system is suitable for large-scale popularization and application. Meanwhile, the safety is high.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic power control technology, specifically relating to a hydraulic power system for use in explosion-proof environments. Background Technology

[0002] In current power source systems used in explosion-proof environments, hydraulic oil is pumped out by an oil pump and connected to the main oil circuit. Solenoid valves and safety valves are connected in parallel between the main oil circuit and the accumulator. A pressure sensor detects the pressure at the front end of the accumulator. When the pressure in the accumulator reaches a set value, the pressure sensor sends a signal, and the solenoid valve is energized to control the safety valve to release pressure. Since both the solenoid valve and the pressure sensor need to be energized and must have explosion-proof performance, and the price of explosion-proof components in explosion-proof environments (such as petroleum, coal mining, etc.) is about 1 to 2 times that of ordinary components, the cost is high. At the same time, complex programming is required to control the electromagnet switch of the solenoid valve, making control inconvenient. Utility Model Content

[0003] To address the aforementioned technical problems, the present invention aims to provide a hydraulic power system for use in explosion-proof environments. This system achieves automatic pressure relief and pressure holding through the linkage of a safety valve and an accumulator, thereby reducing the need for explosion-proof components and eliminating the need for electrical programming control logic. This makes the system convenient to control and low in cost.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A hydraulic power system for use in an explosion-proof environment includes an oil tank, an oil pump, a second check valve, a safety valve, and an accumulator. One end of the oil pump is connected to the oil tank, and the other end is connected in series with the second check valve and then connected to the main oil circuit P. The front end of the accumulator is connected between the second check valve and the main oil circuit P, and the rear end of the accumulator is connected back to the oil tank. One end of the safety valve is connected between the second check valve and the oil pump, and the other end is connected to the rear end of the accumulator and then connected back to the oil tank. The remote control port of the safety valve is connected to the front end of the accumulator.

[0006] Furthermore, a first check valve is connected in series between the second check valve and the oil pump. The direction of the first check valve is the same as that of the second check valve. One end of the safety valve is connected between the second check valve and the first check valve.

[0007] Furthermore, a third check valve is connected in series between the second check valve and the main oil circuit P. The direction of the third check valve is the same as that of the second check valve, and the front end of the accumulator is connected between the second check valve and the third check valve.

[0008] Furthermore, the rear end of the accumulator and the other end of the safety valve are connected in series with a heat exchanger and then connected to an oil tank.

[0009] Furthermore, the accumulator is connected to the main oil circuit P and the heat exchanger via a manual three-way switch.

[0010] Furthermore, an inlet filter is connected in series between the oil pump and the oil tank, and a return filter is connected in series between the heat exchanger and the oil tank.

[0011] Furthermore, it also includes a three-way valve, the first end of which is connected to the oil tank, the second end of which is connected between the first check valve and the oil pump, and the third end of which is connected to a pressure gauge and a pressure sensor.

[0012] Furthermore, one end of the oil pump is connected to a motor via a coupling.

[0013] By adopting the above technical solution, this utility model has the following advantages and effects:

[0014] This utility model provides a hydraulic power system for use in explosion-proof environments. By eliminating two live nodes that require explosion protection, it not only saves two high-cost explosion-proof components, but also eliminates the need for programming. Automatic pressure relief and pressure holding are achieved solely through the linkage between the safety valve and the accumulator, thus eliminating the need for electrical control logic. Since the system has no live nodes, it also avoids safety hazards caused by electrical component failures or circuit problems, making it particularly suitable for flammable and explosive environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the hydraulic power system of this utility model.

[0016] The attached diagram is labeled as follows: 1-Suction filter, 2-Oil pump, 3-Coupling, 4-Oil tank, 5-Motor, 61-First check valve, 62-Second check valve, 63-Third check valve, 7-Three-way valve, 8-Pressure gauge, 9-Safety valve, 10-Pressure sensor, 11-Manual three-way switch, 12-Accumulator, 13-Heat exchanger, 14-Return oil filter, 15-Cooling water connector. Detailed Implementation

[0017] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of this utility model. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of this utility model, but are only for illustrating the essential spirit of the technical solution of this utility model.

[0018] like Figure 1As shown. This utility model provides a hydraulic power system for use in an explosion-proof environment, including an oil tank 4, an oil pump 2, a second check valve 62, a safety valve 9, and an accumulator 12. One end of the oil pump 2 is connected to the oil tank 4, and the other end is connected in series with the second check valve 62 and then connected to the main oil circuit P. The front end of the accumulator 12 is connected between the second check valve 62 and the main oil circuit P, and the rear end of the accumulator 12 is connected back to the oil tank 4. One end of the safety valve 9 is connected between the second check valve 62 and the oil pump 2, and the other end is connected to the rear end of the accumulator 12 and then connected back to the oil tank. The remote control port of the safety valve 9 is connected to the front end of the accumulator 12.

[0019] During hydraulic circuit operation, the second check valve 62 blocks interference from the return oil end of the main hydraulic circuit P to the safety valve 9. Thus, when the pressure difference at the second check valve 62 causes the pressure at the remote control port to exceed the system pressure, the safety valve 9 closes at the set pressure, and the hydraulic oil in the system is output from the main hydraulic circuit P. When the pressure at the front end of the accumulator 12 (the pressure at the remote control port) is less than the system pressure, pressure is released through the safety valve 9. This saves two energized nodes, i.e., two explosion-proof hydraulic components, and eliminates the need for programmed control; only real-time monitoring of the pressure at the front end of the accumulator 12 is required, making control more convenient.

[0020] Furthermore, to protect the oil pump 2 and prevent it from being damaged by reverse rotation, a first check valve 61 is connected in series between the second check valve 62 and the oil pump 2. The direction of the first check valve 61 is the same as that of the second check valve 62. One end of the safety valve 9 is connected between the second check valve 62 and the first check valve 61.

[0021] Furthermore, in order to block the interference of the return oil end of the main oil circuit P to the accumulator 12, a third check valve 63 is connected in series between the second check valve 62 and the main oil circuit P. The direction of the third check valve 63 is the same as that of the second check valve 62. The front end of the accumulator 12 is connected between the second check valve 62 and the third check valve 63.

[0022] Furthermore, the rear end of the accumulator 12 and the other end of the safety valve 9 are connected in series with a heat exchanger 13 and then connected to the oil tank 4. One end of the heat exchanger 13 is connected to the cooling water tank through a pair of cooling water connectors 15. The heat exchanger 13 is used to cool the hydraulic oil and reduce its temperature.

[0023] Furthermore, the accumulator 12 is connected to the main oil circuit P and the heat exchanger 13 via a manual three-way switch 11. The manual three-way switch 11 connects the main oil circuit P to the accumulator 12 or the heat exchanger 13 by rotating the handle, thereby switching the direction of the oil circuit.

[0024] Furthermore, an inlet filter 1 is connected in series between the oil pump 2 and the oil tank 4, and a return filter 14 is connected in series between the heat exchanger 13 and the oil tank 4. The hydraulic oil can be filtered and purified through the inlet filter 1 and the return filter 14.

[0025] Furthermore, one end of the oil pump 2 is connected to a motor 5 via a coupling 3. The motor 5 drives the oil pump 2 to rotate and draw oil from the oil tank 4 through the rotation of the coupling 3.

[0026] Furthermore, a three-way valve 7 is connected between the first check valve 61 and the oil pump 2. The second end of the three-way valve 7 is connected between the first check valve 61 and the oil pump 2, the first end of the three-way valve 7 is connected to the oil tank 4, and the third end is connected in parallel to a pressure gauge 8 and a pressure sensor 10. The pressure gauge 8 can intuitively read the system pressure value, and the pressure sensor 10 can convert the monitored pressure value into an analog quantity and output it to the host computer, which then displays it on the control panel.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hydraulic power system for use in an explosion-proof environment, characterized in that, The system includes an oil tank, an oil pump, a second check valve, a safety valve, and an accumulator. One end of the oil pump is connected to the oil tank, and the other end is connected in series with the second check valve and then connected to the main oil circuit P. The front end of the accumulator is connected between the second check valve and the main oil circuit P, and the rear end of the accumulator is connected back to the oil tank. One end of the safety valve is connected between the second check valve and the oil pump, and the other end is connected to the rear end of the accumulator and then connected back to the oil tank. The remote control port of the safety valve is connected to the front end of the accumulator.

2. The hydraulic power system for use in an explosion-proof environment according to claim 1, characterized in that, A first check valve is connected in series between the second check valve and the oil pump. The direction of the first check valve is the same as that of the second check valve. One end of the safety valve is connected between the second check valve and the first check valve.

3. The hydraulic power system for use in an explosion-proof environment according to claim 2, characterized in that, A third check valve is connected in series between the second check valve and the main oil circuit P. The direction of the third check valve is the same as that of the second check valve. The front end of the accumulator is connected between the second check valve and the third check valve.

4. The hydraulic power system for use in an explosion-proof environment according to claim 3, characterized in that, The accumulator's rear end and the other end of the safety valve are connected in series with a heat exchanger and then connected to an oil tank.

5. A hydraulic power system for use in an explosion-proof environment according to claim 4, characterized in that, The accumulator is connected to the main oil circuit P and the heat exchanger via a manual three-way switch.

6. A hydraulic power system for use in an explosion-proof environment according to claim 4 or 5, characterized in that, An oil inlet filter is connected in series between the oil pump and the oil tank, and a return oil filter is connected in series between the heat exchanger and the oil tank.

7. A hydraulic power system for use in an explosion-proof environment according to claim 6, characterized in that, It also includes a three-way valve, the first end of which is connected to the oil tank, the second end of which is connected between the first check valve and the oil pump, and the third end of which is connected to a pressure gauge and a pressure sensor.

8. A hydraulic power system for use in an explosion-proof environment according to claim 7, characterized in that, One end of the oil pump is connected to a motor via a coupling.

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