Gas leakage prevention device of gas-liquid type energy accumulator

Abstract

The utility model provides a gas leakage prevention device of a gas-liquid type energy storage device, which comprises the gas-liquid type energy storage device, a magnetic turning plate liquid level meter is connected onto the energy storage device, the energy storage device comprises an oil inlet and outlet pipe and an oil drainage pipe, and an output oil port S of a two-position three-way electromagnetic directional valve is connected with a control oil port C of a cartridge valve. An oil inlet P of the two-position three-way electromagnetic directional valve and a first oil port A of the cartridge valve are both connected with an oil inlet and outlet pipe, and a second oil port B of the cartridge valve is connected with a main oil way pipeline of the hydraulic system; and an oil drainage port T and an oil drainage pipe of the two-position three-way electromagnetic directional valve are connected with an oil return tank pipeline of the hydraulic system. The magnetic flap liquid level meter and the two-position three-way electromagnetic directional valve are interlocked, the state of the two-position three-way electromagnetic directional valve is controlled through the liquid level value in the magnetic flap liquid level meter, then the valve element of the cartridge valve is controlled to act, and finally connection and disconnection between the oil inlet and outlet pipe of the energy storage device and the main oil way pipeline of the hydraulic system are achieved. It is ensured that certain liquid and nitrogen are self-locked in the energy accumulator body, and casualties caused by nitrogen leakage are effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of auxiliary devices for hydraulic transmission systems, and relates to a gas-liquid energy accumulator gas leakage prevention device. Background Technique

[0002] Hydraulic transmission technology is different from traditional transmission methods. By pressurizing the hydraulic pressure, the pressurized liquid is used to push the load to move. Because of its flexible layout, high transmission efficiency, and stable operation, it is widely used in industries such as metallurgy, automobiles, petroleum, and manufacturing. Nitrogen, as the cheapest inert gas, is the preferred gas filled in large gas-liquid energy accumulators. The power components, control components, and some auxiliary components of the hydraulic system are generally installed indoors. When a large-area leakage occurs due to a failure of the main pipeline or control valve group indoors, the liquid in the large gas-liquid energy accumulator will quickly flow out of the system along the pipeline, and the nitrogen in the energy accumulator will then escape from the leakage point along the main pipeline and accumulate indoors, causing suffocation of personnel. At the same time, the loss of hydraulic medium and nitrogen will cause certain economic losses. Content of the Utility Model

[0003] The purpose of the utility model is to provide a gas-liquid energy accumulator gas leakage prevention device that can prevent nitrogen leakage in the energy accumulator.

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

[0005] A gas-liquid energy accumulator gas leakage prevention device includes a gas-liquid energy accumulator, which includes an energy accumulator body. An oil inlet and outlet pipe, a nitrogen filling pipe, and a drain pipe are provided on the energy accumulator body. The gas leakage prevention device also includes a magnetic flap level gauge, a two-position three-way electromagnetic directional valve, and a cartridge valve; the magnetic flap level gauge is installed on the side wall of the energy accumulator body. The output oil port S of the two-position three-way electromagnetic directional valve is connected to the control oil port C of the cartridge valve. The oil inlet port P of the two-position three-way electromagnetic directional valve and the first oil port A of the cartridge valve are both connected to the oil inlet and outlet pipe. The second oil port B of the cartridge valve is connected to the main oil circuit pipeline of the hydraulic system; the drain oil port T of the two-position three-way electromagnetic directional valve and the drain pipe are both connected to the hydraulic system return oil tank pipeline.

[0006] The gas leakage prevention device of the utility model interlocks the magnetic flap level gauge with the two-position three-way electromagnetic directional valve, controls the state of the two-position three-way electromagnetic directional valve through the liquid level value in the magnetic flap level gauge, and then controls the movement of the spool of the cartridge valve, and finally realizes the on-off between the oil inlet and outlet pipe of the energy accumulator and the main oil circuit pipeline of the hydraulic system, ensuring that a certain amount of liquid and nitrogen are locked in the energy accumulator body, greatly reducing the hysteresis of manually closing the valve and the risk of suffocation of personnel and economic losses caused by nitrogen leakage. Description of the Drawings

[0007] Figure 1 It is a schematic diagram of the gas leakage prevention device of the utility model;

[0008] Figure 2 This is the working state diagram of the gas leakage prevention device of the present utility model.

[0009] In the figure: 1. Energy storage tank body; 2. Magnetic flap level gauge; 3. Valve seat; 4. Two-position three-way electromagnetic reversing valve; 5. Cartridge valve; 6. Inlet and outlet oil pipe; 7. Drain pipe; 8. Main oil circuit pipe of the hydraulic system; 9. Return oil tank pipe of the hydraulic system; 10. Level sensor; 11. Nitrogen filling pipe. Specific embodiments

[0010] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0011] The gas leakage prevention device of the present utility model is used to prevent the leakage of nitrogen in the gas-liquid energy storage tank. The gas-liquid energy storage tank includes an energy storage tank body 1. An inlet and outlet oil pipe 6 and a nitrogen filling pipe 11 are respectively arranged on the side wall of the energy storage tank body 1, and a drain pipe 7 is arranged at the bottom of the energy storage tank body 1. As Figure 1 shown, the gas leakage prevention device of the present utility model includes a magnetic flap level gauge 2, a two-position three-way electromagnetic reversing valve 4 and a cartridge valve 5; a level sensor 10 is installed at the top of the magnetic flap level gauge 2, and the magnetic flap level gauge 2 is fixed on the side wall of the energy storage tank body 1 through a live joint; the output oil port S of the two-position three-way electromagnetic reversing valve 4 is connected to the control oil port C of the cartridge valve 5, the inlet oil port P of the two-position three-way electromagnetic reversing valve 4 and the first oil port A of the cartridge valve 5 are both connected to the inlet and outlet oil pipe 6, and the second oil port B of the cartridge valve 5 is connected to the main oil circuit pipe 8 of the hydraulic system; the drain oil port T of the two-position three-way electromagnetic reversing valve 4 and the drain pipe 7 are both connected to the return oil tank pipe 9 of the hydraulic system.

[0012] A threaded connector is arranged at the output end of the drain pipe 7. The threaded connector of the drain pipe 7 is connected to the drain oil port T of the two-position three-way electromagnetic reversing valve 4 through a high-pressure rubber hose and is finally connected to the return oil tank pipe 9 of the hydraulic system to form a pressure relief oil circuit.

[0013] The nitrogen filling pipe 11, the inlet and outlet oil pipe 6, the drain pipe 7, the return oil tank pipe 9 of the hydraulic system and the main oil circuit pipe 8 of the hydraulic system are all steel pipes, and each steel pipe is provided with a screw thread joint and a ball valve corresponding to the sealing element, which is convenient for replacing the pipeline and dealing with the leakage point at the connection of the gas leakage device.

[0014] The two-position three-way electromagnetic directional control valve 4 and the cartridge valve 5 are integrally assembled on the valve seat 3. The valve seat 3 is provided with an oil passage and a threaded connecting pipe joint. The first oil port A of the cartridge valve 5 and the oil inlet P of the two-position three-way electromagnetic directional control valve 4 are connected to the inlet and outlet oil pipe 6 along the oil passage through the threaded connecting pipe joint. The second oil port B of the cartridge valve 5 is connected to the main oil circuit pipeline 8 of the hydraulic system along the oil passage through the threaded connecting pipe joint. The cartridge valve 5 has two working states according to the flow direction of the hydraulic medium in the control oil port C, realizing the functions of supplementing pressure for the accumulator body 1, supplying pressure for the hydraulic system, and self-locking and pressure maintaining.

[0015] The working principle of the present utility model:

[0016] The potential energy of the liquid medium in the accumulator body 1 serves as the direct power source of the hydraulic system to provide pressure for the load. The liquid level sensor 10 is used to measure the liquid level value of the magnetic flap liquid level gauge 2 in real time and feedback the continuous liquid level analog signal to the hydraulic system. The magnetic flap liquid level gauge 2 is interlocked with the two-position three-way electromagnetic directional control valve 4. The state of the two-position three-way electromagnetic directional control valve 4 is controlled by the liquid level value in the magnetic flap liquid level gauge 2 on the accumulator, and then the spool movement of the cartridge valve 5 is controlled, finally realizing the on-off between the inlet and outlet oil pipe 6 of the accumulator and the main oil circuit pipeline 8 of the hydraulic system. When the liquid level sensor 10 detects that the liquid level value in the magnetic flap liquid level gauge 2 is lower than or equal to the system preset value, the two-position three-way electromagnetic directional control valve 4 is energized, and the magnetic force generated by the energized coil pushes the spool of the cartridge valve 5 to work.

[0017] When supplementing pressure to the accumulator body 1 and at the same time supplying pressure to the hydraulic system, as Figure 1 shown. The control oil port C of the cartridge valve 5 is communicated with the drain pipe 7, and the cartridge valve 5 is in an open state, realizing the double-pass valve function. The hydraulic medium can flow mutually between the inlet and outlet oil pipe 6 of the gas-liquid accumulator and the main oil circuit pipeline 8 of the hydraulic system according to the pressure difference, supplying pressure to the hydraulic system and supplementing pressure to the gas-liquid accumulator.

[0018] When gas leakage occurs in the gas-liquid accumulator, the gas leakage prevention device of the present utility model is started to realize the self-locking and pressure maintaining of the gas-liquid accumulator, as Figure 2 shown. At this time, the control oil port C of the cartridge valve 5 is communicated with the inlet and outlet oil pipe 6, and the cartridge valve 5 is in a closed state, realizing the one-way valve function to cut off the passage between the main oil circuit pipeline 8 of the hydraulic system and the inlet and outlet oil pipe 6, so that the pressure in the accumulator body 1 cannot flow into the main oil circuit pipeline 8 of the hydraulic system. However, when the pressure in the main oil circuit pipeline 8 of the hydraulic system meets the condition of formula (1), it can enter the accumulator body 1, so that the hydraulic medium is self-locked in the accumulator body 1, and the nitrogen gas is blocked in the cavity above the liquid by the self-locked hydraulic medium, effectively cutting off the possibility of nitrogen gas leakage along the main oil circuit channel of the hydraulic system, realizing the function of preventing gas leakage of the large gas-liquid accumulator.

[0019] P 8 A 1+ P 6 A 3> P 6 A 2+ F 弹簧 (1)

[0020] In formula (1), P 8 is the pressure of the main oil circuit pipeline of the hydraulic system; P 6 is the pressure of the accumulator body; F 弹簧 is the internal spring force of the cartridge valve; A 1 is the cross-sectional area of the lower cavity of the cartridge valve; A 2 is the cross-sectional area of the upper cavity of the cartridge valve; A 3 is the cross-sectional area of the valve core of the cartridge valve.

Claims

1. A gas-liquid energy storage device for preventing gas leakage, comprising a gas-liquid energy storage device, the gas-liquid energy storage device including an energy storage device body (1), and an oil inlet / outlet pipe (6), a nitrogen charging pipe (11) and an oil drain pipe (7) are provided on the energy storage device body (1), and it is characterized in that, The gas leakage prevention device further includes a magnetic flap level gauge (2), a two-position three-way electromagnetic directional valve (4), and a cartridge valve (5); the magnetic flap level gauge (2) is installed on the side wall of the energy storage body (1), the output oil port S of the two-position three-way electromagnetic directional valve (4) is connected to the control oil port C of the cartridge valve (5), the inlet oil port P of the two-position three-way electromagnetic directional valve (4) and the first oil port A of the cartridge valve (5) are both connected to the inlet and outlet oil pipe (6), and the second oil port B of the cartridge valve (5) is connected to the main oil circuit pipeline (8) of the hydraulic system; the drain oil port T of the two-position three-way electromagnetic directional valve (4) and the drain pipe (7) are both connected to the hydraulic system return oil tank pipeline (9).

2. The gas-liquid energy storage device for preventing gas leakage according to claim 1, wherein A liquid level sensor (10) is installed at the top of the magnetic flap level gauge (2).

3. The gas-liquid energy storage device anti-gas leakage device according to claim 1, characterized in that, The magnetic flap level gauge (2) is fixed on the energy storage body (1) through a quick-connect fitting.

4. The gas-liquid energy storage device for preventing gas leakage according to claim 1, characterized in that, The output end of the drain pipe (7) is provided with a threaded connector, and the threaded connector of the drain pipe (7) is connected to the drain oil port T of the two-position three-way electromagnetic directional valve (4) through a high-pressure rubber hose.

5. The gas-liquid energy storage device for preventing gas leakage according to claim 1, characterized in that, The two-position three-way electromagnetic directional valve (4) and the cartridge valve (5) are integrally assembled on the valve seat (3). The valve seat (3) is provided with an oil passage and a threaded connector. The first oil port A of the cartridge valve (5) and the inlet oil port P of the two-position three-way electromagnetic directional valve (4) are connected to the inlet and outlet oil pipe (6) along the oil passage through the threaded connector, and the second oil port B of the cartridge valve (5) is connected to the main oil circuit pipeline (8) of the hydraulic system along the oil passage through the threaded connector.

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