System for cleaning and pressure supply of hydraulic pipeline

Abstract

The utility model discloses a system for cleaning and pressure supply of a hydraulic pipeline, which relates to the technical field of hydraulic pressure supply and comprises an oil tank and a pressure supply oil way connected with the oil tank. A single proportional pump, a one-way valve, an oil supply filter, a pressure gauge, a first ball valve, a gear flowmeter, a second ball valve, a pressure transmitter and an electromagnetic directional valve are sequentially arranged on the pressure supply oil way in the oil supply direction, two output ports of the electromagnetic directional valve are connected with a pressure supply quick connector and a flushing quick connector respectively, and an oil return port of the electromagnetic directional valve is connected with an oil return pipeline; the oil return pipeline is connected with the oil tank, a first oil return filter and a second oil return filter are arranged on the oil return pipeline in parallel, and a low-pressure shut-off valve is arranged between the pressure gauge and the first ball valve, so that the hydraulic pipeline can be subjected to pressure supply and cleaning operation, the pressure boosting process and the pressure relief process are automatically realized, the automation degree is high, the labor cost is reduced, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pressure supply, and particularly relates to a system for cleaning and supplying pressure to a hydraulic pipeline. Background Art

[0002] The hydraulic system of an aircraft needs to be cleaned and supplied with pressure through equipment to complete the inspection and debugging of the working performance of each part of the hydraulic system on the aircraft. At present, the equipment for cleaning and supplying pressure to the hydraulic pipeline is large in volume, relatively heavy, and has a low degree of automation. The whole process is manually operated, resulting in high labor costs and low efficiency. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a system for cleaning and supplying pressure to a hydraulic pipeline to solve the deficiencies of the prior art.

[0004] The purpose of the utility model is realized through the following technical solutions: A system for cleaning and supplying pressure to a hydraulic pipeline includes an oil tank and a pressure supply oil circuit connecting the oil tank. The pressure supply oil circuit is sequentially provided with a single proportional pump, a check valve, an oil supply filter, a pressure gauge, a first ball valve, a gear flowmeter, a second ball valve, a pressure transmitter, and an electromagnetic directional valve along the oil supply direction. The two output ports of the electromagnetic directional valve are respectively connected with a pressure supply quick connector and a flushing quick connector. The oil return port of the electromagnetic directional valve is connected with an oil return pipeline, and the oil return pipeline is connected with the oil tank. A first oil return filter and a second oil return filter are arranged in parallel on the oil return pipeline. A low-pressure shut-off valve is arranged between the pressure gauge and the first ball valve.

[0005] Further, it further includes a self-cleaning pipeline. The input end of the self-cleaning pipeline is connected to the pressure supply oil circuit, and the output end of the self-cleaning pipeline is connected to the oil return pipeline. The input end of the self-cleaning pipeline is located between the pressure transmitter and the electromagnetic directional valve.

[0006] Further, an electromagnetic unloading valve and a manual valve ball are arranged in parallel on the self-cleaning pipeline.

[0007] Further, it further includes a circulating heat dissipation system. The circulating heat dissipation system includes a circulating pump and a cooler. The input end of the circulating pump is connected to the oil tank through an oil inlet pipeline, and the output end of the circulating pump is connected to the oil tank through a circulating pipeline. The cooler is arranged on the circulating pipeline.

[0008] Further, the circulating heat dissipation system further includes a temperature transmitter, a liquid level gauge, and an air filter connected to the oil tank.

[0009] Further, an oil suction filter is arranged on the pressure supply oil circuit, and the oil suction filter is located between the single proportional pump and the oil tank.

[0010] Further, an accumulator is connected to the pressure supply oil path. The accumulator is located between the one-way valve and the oil supply filter, and a third ball valve is provided on the pipeline of the accumulator.

[0011] Further, a first overflow valve is provided on the pressure supply oil path. The first overflow valve is located between the oil supply filter and the pressure gauge, and a second overflow valve is provided on the pipeline of the low-pressure shut-off valve.

[0012] Further, an oil drain valve is provided on the fuel tank, and a fourth ball valve is provided on the return oil pipeline.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. It can supply pressure and clean the hydraulic pipeline, automatically realize the pressure increase process and the pressure relief process, with high automation degree, reduce labor costs and improve efficiency.

[0015] 2. It has automatic protection against overpressure, overcurrent and overheating, and the protection parameters can be set according to needs.

[0016] 3. A self-cleaning pipeline is provided, which can self-clean the cleaning and pressure supply system, extend the service life of the system, and make the pressure supply and flushing effects better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a hydraulic schematic diagram of a system for cleaning and supplying pressure to a hydraulic pipeline of the present utility model;

[0018] In the figure, 1 - fuel tank, 2 - single proportional pump, 3 - one-way valve, 4 - oil supply filter, 5 - pressure gauge, 6 - first ball valve, 7 - gear flowmeter, 8 - second ball valve, 9 - pressure transmitter, 10 - electromagnetic reversing valve, 11 - pressure supply quick connector, 12 - flushing quick connector, 13 - first return oil filter, 14 - second return oil filter, 15 - low-pressure shut-off valve, 16 - electromagnetic unloading valve, 17 - manual valve ball, 18 - circulation pump, 19 - cooler, 20 - temperature transmitter, 21 - liquid level gauge, 22 - air filter, 23 - oil suction filter, 24 - accumulator, 25 - third ball valve, 26 - first overflow valve, 27 - second overflow valve, 28 - oil drain valve, 29 - fourth ball valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Embodiment 1

[0020] As Figure 1As shown in the figure, a system for hydraulic pipeline cleaning and pressure supply includes an oil tank 1 and a pressure supply oil circuit connected to the oil tank 1. Along the oil supply direction, the pressure supply oil circuit is successively provided with a single proportional pump 2, a one-way valve 3, an oil supply filter 4, a pressure gauge 5, a first ball valve 6, a gear flowmeter 7, a second ball valve 8, a pressure transmitter 9, and an electromagnetic directional valve 10. Two output ports of the electromagnetic directional valve 10 are respectively connected with a pressure supply quick connector 11 and a flushing quick connector 12. The oil return port of the electromagnetic directional valve 10 is connected with an oil return pipeline, and the oil return pipeline is connected to the oil tank 1. A first oil return filter 13 and a second oil return filter 14 are arranged in parallel on the oil return pipeline. A low-pressure shut-off valve 15 is arranged between the pressure gauge 5 and the first ball valve 6. An oil suction filter 23 is arranged on the pressure supply oil circuit, and the oil suction filter 23 is located between the single proportional pump 2 and the oil tank 1, having the functions of pressure supply and flushing. When starting the pressure supply function, the pressure supply quick connector 11 is connected to the aircraft hydraulic system, the low-pressure shut-off valve 15 is closed, the electro-hydraulic proportional pump 2 is started, the oil in the oil tank 1 is extracted, the oil is filtered by the oil suction filter 23, and the oil passes through the one-way valve 3, the oil supply filter 4, the pressure gauge 5, the first ball valve 6, the gear flowmeter 7, the second ball valve 8, the pressure transmitter 9, the electromagnetic directional valve 10, and the pressure supply quick connector 11 and enters the aircraft hydraulic system, completing the pressure supply to the aircraft hydraulic system. The pressure supply oil returns to the oil tank 1 through the first oil return filter 13 or the second oil return filter 14 of the oil return pipeline, and the flow rate is controlled by the pressure gauge 5 and the gear flowmeter 7 to realize the adjustment of the pressure supply pressure. When starting the flushing function, the flushing quick connector 12 is connected to the aircraft hydraulic system, the electro-hydraulic proportional pump 2 is started, the oil in the oil tank 1 is extracted, the oil is filtered by the oil suction filter 23, and the oil passes through the one-way valve 3, the oil supply filter 4, the pressure gauge 5, the low-pressure shut-off valve 15, the first ball valve 6, the gear flowmeter 7, the second ball valve 8, the pressure transmitter 9, the electromagnetic directional valve 10, and the flushing quick connector 12 and enters the aircraft hydraulic system. The flushed oil returns to the oil tank 1 through the first oil return filter 13 or the second oil return filter 14 of the oil return pipeline, and circulates in this way to realize the circulating flushing of the aircraft hydraulic system. It has the functions of pressure supply and flushing, and is fully automated, reducing the labor cost and improving the pressure supply and flushing efficiency. Among them, the electro-hydraulic proportional pump 2 uses a constant pressure variable pump of Parker, adopts electro-hydraulic proportional output pressure regulation, and the pump output pressure closed-loop controls the swash plate angle of the variable pump, automatically controlling the pressure at the set pressure value, having the characteristics of convenient control and stable output pressure.

[0021] Further, an accumulator 24 is connected to the pressure supply oil circuit. The accumulator 24 is located between the one-way valve 3 and the oil supply filter 4. A third ball valve 25 is arranged on the pipeline of the accumulator 24. The accumulator 24 ensures the stability of the output pressure under various working conditions.

[0022] Further, a first overflow valve 26 is provided on the oil supply line. The first overflow valve 26 is located between the oil supply filter 4 and the pressure gauge 5. A second overflow valve 27 is provided on the pipeline of the low-pressure shut-off valve 15. When the output pressure of the single-proportion pump 2 is too high, the first overflow valve 26 and the second overflow valve 27 can automatically overflow and unload, ensuring the stability of the oil supply pressure and the flushing pressure.

[0023] Further, an oil drain valve 28 is provided on the fuel tank 1 and is opened when replacing the oil in the fuel tank 1. A fourth ball valve 29 is provided on the return oil pipeline. When the circuits of the first return oil filter 13 and the second return oil filter 14 are blocked, the fourth ball valve 29 is manually opened to complete the unloading of the return oil pipeline.

[0024] Embodiment 2

[0025] Based on Embodiment 1, as Figure 1 shown, it further includes a self-cleaning pipeline. The input end of the self-cleaning pipeline is connected to the oil supply line, and the output end of the self-cleaning pipeline is connected to the return oil line. The input end of the self-cleaning pipeline is located between the pressure transmitter 9 and the electromagnetic directional control valve 10. An electromagnetic unloading valve 16 and a manual valve ball 17 are arranged in parallel on the self-cleaning pipeline. When the system needs to be cleaned, the electromagnetic directional control valve 10 is closed, the electromagnetic unloading valve 16 and the single-proportion pump 2 are opened, and the oil passes through the single-proportion pump 2, check valve 3, oil supply filter 4, pressure gauge 5, first ball valve 6, gear flowmeter 7, second ball valve 8, pressure transmitter 9, electromagnetic unloading valve 16 and the first return oil filter 13 or the second return oil filter 14 and returns to the fuel tank 1, so as to realize the self-cleaning of the system by circulating in this way; the manual valve ball 17 is used to manually open the self-cleaning pipeline and can manually relieve pressure when the electromagnetic unloading valve 16 has problems, ensuring the safety of the system.

[0026] Embodiment 3

[0027] Based on Embodiment 2, as Figure 1 shown, it further includes a circulating cooling system. The circulating cooling system includes a circulating pump 18 and a cooler 19. The input end of the circulating pump 18 is connected to the fuel tank 1 through an oil inlet pipeline, and the output end of the circulating pump 18 is connected to the fuel tank 1 through a circulating pipeline. The cooler 19 is arranged on the circulating pipeline. The circulating cooling system further includes a temperature transmitter 20, a liquid level gauge 21 and an air filter 22 connected to the fuel tank 1. The temperature of the oil in the fuel tank 1 is detected by the temperature transmitter 20. When the oil temperature is higher than the set value, the circulating pump 18 is started to make the oil circulate through the cooler 19, and the cooler 19 cools the oil. The liquid level gauge 21 is used to detect the height of the oil in the fuel tank 1 and can supplement it in time when the oil decreases.

Claims

1. A system for cleaning and supplying pressure to hydraulic pipelines, characterized in that: The invention comprises an oil tank (1) and a pressure supply oil circuit connected to the oil tank (1); the pressure supply oil circuit is provided with a single proportional pump (2), a one-way valve (3), an oil supply filter (4), a pressure gauge (5), a first ball valve (6), a gear flow meter (7), a second ball valve (8), a pressure transmitter (9) and an electromagnetic reversing valve (10) in sequence along the oil supply direction; two output ports of the electromagnetic reversing valve (10) are respectively connected to a pressure supply quick connector (11) and a flushing quick connector (12); the oil return port of the electromagnetic reversing valve (10) is connected to an oil return pipeline; the oil return pipeline is connected to the oil tank (1); a first oil return filter (13) and a second oil return filter (14) are provided in parallel on the oil return pipeline; and a low-pressure shut-off valve (15) is provided between the pressure gauge (5) and the first ball valve (6).

2. A system for cleaning and supplying pressure to hydraulic pipelines according to claim 1, characterized in that: It also includes a self-cleaning pipeline, the input end of which is connected to the pressure supply oil pipeline, the output end of which is connected to the oil return pipeline, and the input end of which is located between the pressure transmitter (9) and the electromagnetic reversing valve (10).

3. A system for cleaning and supplying pressure to hydraulic pipelines according to claim 2, characterized in that: An electromagnetic unloading valve (16) and a manual valve ball (17) are arranged in parallel on the self-cleaning pipeline.

4. A system for cleaning and supplying pressure to hydraulic pipelines according to claim 1, characterized in that: It also includes a circulating heat dissipation system, which includes a circulating pump (18) and a cooler (19), wherein the input end of the circulating pump (18) is connected to the oil tank (1) via an oil inlet pipeline, the output end of the circulating pump (18) is connected to the oil tank (1) via a circulating pipeline, and the cooler (19) is arranged on the circulating pipeline.

5. A system for cleaning and supplying pressure to hydraulic pipelines according to claim 4, characterized in that: The circulating heat dissipation system also includes a temperature transmitter (20), a liquid level meter (21) and an air filter (22) connected to the oil tank (1).

6. A system for cleaning and supplying pressure to hydraulic pipelines according to claim 1, characterized in that: An oil suction filter (23) is provided on the pressure oil supply line, and the oil suction filter (23) is located between the single proportional pump (2) and the oil tank (1).

7. A system for cleaning and supplying pressure to hydraulic pipelines according to claim 1, characterized in that: An accumulator (24) is connected to the pressure oil supply line. The accumulator (24) is located between the one-way valve (3) and the oil supply filter (4). A third ball valve (25) is provided on the pipeline of the accumulator (24).

8. A system for cleaning and supplying pressure to hydraulic pipelines according to claim 1, characterized in that: A first overflow valve (26) is provided on the pressure oil supply line, and the first overflow valve (26) is located between the oil supply filter (4) and the pressure gauge (5). A second overflow valve (27) is provided on the pipeline of the low-pressure shut-off valve (15).

9. A system for cleaning and supplying pressure to hydraulic pipelines according to claim 1, characterized in that: The oil tank (1) is provided with an oil drain valve (28), and the oil return pipeline is provided with a fourth ball valve (29).

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