A quick start-stop device for starting an emergency diesel engine using high-pressure compressed air

Abstract

The present invention provides a quick start-stop device for starting an emergency diesel engine using high-pressure compressed air, including a main line and a maintenance line and a spare line connected in parallel with the main line; the main line includes a shore-end compressed air machine, a high-pressure oil-gas separator, a high-pressure air storage tank, a high-pressure pressure reducing device, a high-pressure air accumulator and a diesel engine connected in sequence; the maintenance line includes a maintenance pipeline, an eighth high-pressure switch valve and a sixth high-pressure switch valve connected in sequence, the maintenance pipeline is connected to the road between the high-pressure pressure reducing device and the high-pressure air accumulator, and the sixth high-pressure switch valve is connected to the high-pressure air storage tank. The present invention adds a high-pressure oil-gas separation device to separate oil and gas, preventing damage to pipelines, pressure reducing devices, diesel engines, etc. caused by oil and water infiltration, and high-pressure one-way valves and high-pressure switch valves are installed at some important positions to avoid the occurrence of backflow.

Description

Technical Field

[0001] The invention relates to a quick start-stop device for starting an emergency diesel engine by using high-pressure compressed air, belonging to the technical field of diesel engine start-stop on ocean-going ships. Background Art

[0002] At present, traditional diesel engine starting devices at home and abroad all use compressed air machines. When compressed air enters the air tank, not only will there be a backflow problem, but the oil and water carried in the compressed air will invade or even damage the pipeline, pressure reducing device, and the internal structure of the diesel engine. Especially in the marine field, in the absence of a compressed air machine on board, it becomes more difficult to start an ocean-going diesel engine. On the other hand, there is no pressure reduction measure for high-pressure compressed air, which poses a huge safety hazard to the corresponding protective measures during maintenance. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a quick start-stop device for starting an emergency diesel engine using high-pressure compressed air. The quick start-stop device for starting an emergency diesel engine using high-pressure compressed air solves a series of problems in the existing emergency diesel engine quick start-stop device using compressed air, such as compressed air reflux, oily and water-containing compressed air eroding and damaging pipelines, pressure reducing devices, and internal structures of the diesel engine, inability to start the emergency diesel engine intermittently multiple times, inability to reduce and stabilize the voltage, inability to replace and repair, and lack of spare pipelines.

[0004] The present invention is achieved through the following technical solutions.

[0005] The present invention provides a quick start-stop device for starting an emergency diesel engine using high-pressure compressed air, comprising a main pipeline and a maintenance pipeline and a spare pipeline connected in parallel with the main pipeline; the main pipeline comprises a shore-end compressed air machine, a high-pressure oil-gas separator, a high-pressure air storage tank, a high-pressure pressure reducing device, a high-pressure air accumulator and a diesel engine connected in sequence; the maintenance pipeline comprises a maintenance pipeline, an eighth high-pressure switch valve and a sixth high-pressure switch valve connected in sequence, the maintenance pipeline is connected to the road between the high-pressure pressure reducing device and the high-pressure air accumulator, and the sixth high-pressure switch valve is connected to the high-pressure air storage tank; the spare pipeline comprises a spare pipeline, a ninth high-pressure switch valve, a third high-pressure pressure gauge, a second high-pressure mass flowmeter, a third high-pressure check valve and a spare diesel engine connected in sequence, and the spare pipeline is connected between the high-pressure air accumulator and the diesel engine.

[0006] A first high-pressure switch valve is provided between the shore-end air compressor and the high-pressure oil-gas separator.

[0007] A first high-pressure one-way valve and a second high-pressure switch valve are provided between the high-pressure oil-gas separator and the high-pressure gas storage tank.

[0008] A safety valve is disposed at one end of the high-pressure gas storage tank, and a seventh high-pressure switch valve is disposed at the other end, and the seventh high-pressure switch valve is connected to the sixth high-pressure switch valve.

[0009] One side of the high-pressure gas storage tank is connected to a first high-pressure pressure gauge via a third high-pressure switch valve.

[0010] A fourth high-pressure switch valve is provided between the high-pressure gas storage tank and the high-pressure pressure reducing device.

[0011] A fifth high-pressure switch valve, a second high-pressure pressure gauge, a first high-pressure mass flow meter and a second high-pressure check valve are arranged in sequence between the high-pressure air accumulator and the diesel engine, and a spare pipeline is located between the high-pressure air accumulator and the fifth high-pressure switch valve.

[0012] The beneficial effects of the present invention are as follows: gas is stored in a high-pressure gas storage tank, and the pressure is reduced by a high-pressure reducing device and stabilized by a high-pressure air accumulator, thereby realizing multiple intermittent starts and stops of a marine diesel engine; a high-pressure oil-gas separation device is added to separate oil and gas, thereby preventing damage to pipelines, pressure reducing devices, diesel engines, etc. caused by oil and water infiltration, and high-pressure one-way valves and high-pressure switching valves are installed at some important positions to avoid the occurrence of backflow, while also facilitating the maintenance and replacement of pipelines and the decompression of compressed air retained in the pipelines before the next start, thereby avoiding the danger caused by starting the diesel engine; in the absence of a continuous air supply from a compressed air machine, by storing sufficient compressed air and being able to reduce the pressure of the high-pressure compressed air, the diesel engine can be started intermittently multiple times for emergency power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the connection structure of the present invention;

[0014] In the figure: 1-shore compressed air machine, 2-first high-pressure switch valve, 3-high-pressure oil-gas separator, 4-first high-pressure one-way valve, 5-second high-pressure switch valve, 6-high-pressure gas storage tank, 7-safety valve, 8-first high-pressure pressure gauge, 9-third high-pressure switch valve, 10-fourth high-pressure switch valve, 11-high-pressure pressure reducing device, 12-high-pressure air accumulator, 13-fifth high-pressure switch valve, 14-second high-pressure pressure gauge, 15-first high-pressure mass flowmeter, 16-second high-pressure one-way valve, 17-diesel engine, 18-sixth high-pressure switch valve, 19-seventh high-pressure switch valve, 20-eighth high-pressure switch valve, 21-ninth high-pressure switch valve, 22-third high-pressure pressure gauge, 23-second high-pressure mass flowmeter, 24-third high-pressure one-way valve, 25-spare diesel engine, 26-spare pipeline, 27-maintenance pipeline. DETAILED DESCRIPTION

[0015] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0016] like Figure 1 A quick start-stop device for starting an emergency diesel engine using high-pressure compressed air is shown, comprising a main pipeline and a maintenance pipeline and a spare pipeline connected in parallel with the main pipeline; the main pipeline comprises a shore-end compressed air machine 1, a high-pressure oil-gas separator 3, a high-pressure air storage tank 6, a high-pressure pressure reducing device 11, a high-pressure air accumulator 12 and a diesel engine 17 connected in sequence; the maintenance pipeline comprises a maintenance pipeline 27, an eighth high-pressure switch valve 20 and a sixth high-pressure switch valve 18 connected in sequence, the maintenance pipeline 27 is connected to the road between the high-pressure pressure reducing device 11 and the high-pressure air accumulator 12, and the sixth high-pressure switch valve 18 is connected to the high-pressure air storage tank 6; the spare pipeline comprises a spare pipeline 26, a ninth high-pressure switch valve 21, a third high-pressure pressure gauge 22, a second high-pressure mass flowmeter 23, a third high-pressure check valve 24 and a spare diesel engine 25 connected in sequence, and the spare pipeline 26 is connected between the high-pressure air accumulator 12 and the diesel engine 17.

[0017] A first high-pressure switch valve 2 is provided between the shore-side air compressor 1 and the high-pressure oil-gas separator 3 .

[0018] A first high-pressure one-way valve 4 and a second high-pressure switch valve 5 are provided between the high-pressure oil-gas separator 3 and the high-pressure gas storage tank 6 .

[0019] A safety valve 7 is disposed at one end of the high-pressure gas storage tank 6 , and a seventh high-pressure switch valve 19 is disposed at the other end. The seventh high-pressure switch valve 19 is connected to the sixth high-pressure switch valve 18 .

[0020] One side of the high-pressure gas storage tank 6 is connected to a first high-pressure pressure gauge 8 via a third high-pressure switch valve 9 .

[0021] A fourth high-pressure switch valve 10 is provided between the high-pressure gas storage tank 6 and the high-pressure pressure reducing device 11 .

[0022] A fifth high-pressure switch valve 13, a second high-pressure pressure gauge 14, a first high-pressure mass flowmeter 15 and a second high-pressure check valve 16 are sequentially arranged between the high-pressure air accumulator 12 and the diesel engine 17, and a spare pipeline 26 is located between the high-pressure air accumulator 12 and the fifth high-pressure switch valve 13.

[0023] Furthermore, the high-pressure oil-gas separator 3 separates the oil-water combination by utilizing a rotary blade adsorption separation and a filter screen.

[0024] Specifically, the main function of the high-pressure oil-gas separation device 3 is to separate the oil and water in the compressed air; the main function of the first high-pressure one-way valve 4 is to prevent the compressed air from flowing back; the main function of the second high-pressure switch valve 5 and the fourth high-pressure switch valve 10 is to block the high-pressure gas inlet and outlet of the high-pressure gas storage tank 6; the high-pressure gas storage tank 6 mainly stores high-pressure compressed air that can start the diesel engine 17 intermittently for many times; the main function of the safety valve 7 is to avoid the safety problems caused by the temperature increase of the high-pressure gas storage tank 6; the main function of the third high-pressure switch valve 9 is to prevent the high-pressure compressed air from directly impacting the first high-pressure pressure gauge 8; the main function of the first high-pressure pressure gauge 8 is to measure the pressure value of the high-pressure gas storage tank 6; the main function of the high-pressure pressure reducing device 11 is to reduce the pressure of 20MPa to the required pressure value to avoid damage to the diesel engine 17 due to excessive pressure; the main function of the high-pressure air accumulator 12 is to balance the pressure fluctuations in the pipeline to avoid pipeline vibration or failure to start the diesel engine 17 due to pressure fluctuations; the main function of the fifth high-pressure switch valve 13 and the ninth high-pressure switch valve 21 It is to ensure that before the compressed air is input to the diesel engine 17 and the standby diesel engine 25, the high-pressure accumulator 12 stabilizes the compressed air in the pipeline before opening, and at the same time, when the main pipeline is working, the ninth high-pressure switch valve 21 is closed, and when the main pipeline fails, the ninth high-pressure switch valve 21 is opened; the second high-pressure pressure gauge 14 and the third high-pressure pressure gauge 22 are mainly used to detect the pipeline pressure value; the first high-pressure mass flowmeter 15 and the second high-pressure mass flowmeter 23 are mainly used to detect the air flow required per second in the pipeline; the second high-pressure check valve 16 and the third high-pressure check valve 24 are mainly used to prevent the compressed air from flowing back after the diesel engine is started; the seventh high-pressure switch valve 19 is mainly used to discharge the sewage in the high-pressure gas storage tank 6; the eighth high-pressure switch valve 20 is mainly used when the components are repaired or replaced, and the pipeline can be depressurized; the sixth high-pressure switch valve 18 allows the compressed gas discharged from the high-pressure gas storage tank 6 and the maintenance pipeline 27 to be steadily depressurized step by step, avoiding the vibration and abnormal sound of the sewage pipeline caused by high pressure and increasing the service life of the high-pressure pressure reducing device 11.

[0025] The working process of the present invention is:

[0026] The air enters the high-pressure gas storage tank 6 after passing through the shore-end compressed air machine 1, the first high-pressure switch valve 2, the high-pressure oil-gas separation device 3, the first high-pressure check valve 4, and the second high-pressure switch valve 5. The high-pressure compressed air in the high-pressure gas storage tank 6 enters the high-pressure pressure reducing device 11 through the fourth high-pressure switch valve 10. The high-pressure pressure reducing device 11 reduces the compressed air with a pressure of 20MPa to a certain pressure, and finally enters the diesel engine 17 through the high-pressure air accumulator 12, the fifth high-pressure switch valve 13, the second high-pressure pressure gauge 14, the first high-pressure mass flowmeter 15, and the second high-pressure check valve 16. At this time, the solenoid valve equipped at the port of the diesel engine 17 is opened, and the high-pressure compressed air enters the diesel engine 17. Under the action of the high-pressure compressed air, the drive shaft is meshed with the flywheel of the diesel engine 17, and then the axial starting valve is opened, thereby completing the starting of the diesel engine 17. At this time, the solenoid valve is closed, and the high-pressure compressed air stops entering, thereby completing a start-stop.

[0027] When the diesel engine 17 is started, the fourth high-pressure switch valve 10 is opened, and the high-pressure compressed air enters the high-pressure pressure reducing device 11, and the high-pressure air from the air storage tank is depressurized to the starting acceptance value of the diesel engine 17. After the pressure is reduced, the high-pressure air accumulator 12 is connected to ensure that the pressure is output to the diesel engine 17 end stably. After a certain period of time, the diesel engine 17 is started, in order to facilitate the maintenance and replacement of the pipeline behind the high-pressure air accumulator 12 and the compressed air retained in the pipeline when the pressure relief device is started next time, so as to avoid the danger caused by the start of the diesel engine 17;

[0028] An eighth high-pressure switch valve 20 is installed between the high-pressure reducing device 11 and the high-pressure air accumulator 12 for pressure relief and exhaust. To ensure that the pressure and air volume entering the diesel engine 17 are sufficient and to prevent the compressed air from flowing back, a fifth high-pressure switch valve 13, a second high-pressure pressure gauge 14, a first high-pressure mass flowmeter 15 and a second high-pressure one-way valve 16 are connected to the rear end of the high-pressure air accumulator 12 for detection and check. When the main pipeline fails, the backup pipeline is activated to ensure that the device can start the backup diesel engine 25 normally.

[0029] In summary, the present invention can filter oil and water in compressed air. In the absence of a compressed air machine, when sailing at sea, sufficient high-pressure compressed air can be used to start the diesel engine intermittently for multiple times. The pressure can be relieved when replacing components or performing maintenance or when starting the next time to avoid affecting the safety of equipment and personnel, and a spare pipeline is provided to ensure the normal starting of the diesel engine. The high-pressure compressed air flowing out of the air storage tank is reduced in pressure to the safe pressure value of the diesel engine to avoid internal damage to the diesel engine or personnel safety caused by the high pressure. After the high-pressure reducing device reduces the pressure, the high-pressure air accumulator ensures that the pressure of the high-pressure compressed air flowing into the diesel engine is stable to avoid failure of starting the diesel engine due to pressure fluctuations. The present invention can filter oil and water in the compressed air and complete multiple starts and stops of the diesel engine. The pipeline has an anti-vibration effect and is safe, reliable and stable in operation.

Claims

1. A quick start-stop device for starting an emergency diesel engine using high-pressure compressed air, comprising a main pipeline and a maintenance pipeline and a spare pipeline connected in parallel with the main pipeline, characterized in that: The main pipeline comprises a shore-end compressed air machine (1), a high-pressure oil-gas separator (3), a high-pressure gas storage tank (6), a high-pressure pressure reducing device (11), a high-pressure air accumulator (12) and a diesel engine (17) connected in sequence; the maintenance pipeline comprises a maintenance pipeline (27), an eighth high-pressure switch valve (20) and a sixth high-pressure switch valve (18) connected in sequence, the maintenance pipeline (27) is connected to the road between the high-pressure pressure reducing device (11) and the high-pressure air accumulator (12), and the sixth high-pressure switch valve (18) is connected to the high-pressure gas storage tank (6); the standby pipeline comprises a standby pipeline (26), a ninth high-pressure switch valve (21), a third high-pressure pressure gauge (22), a second high-pressure mass flowmeter (23), a third high-pressure check valve (24) and a standby diesel engine (25) connected in sequence, and the standby pipeline (26) is connected between the high-pressure air accumulator (12) and the diesel engine (17); A first high-pressure switch valve (2) is provided between the shore-end compressed air machine (1) and the high-pressure oil-gas separator (3); A first high-pressure one-way valve (4) and a second high-pressure switch valve (5) are provided between the high-pressure oil-gas separator (3) and the high-pressure gas storage tank (6); A safety valve (7) is provided at one end of the high-pressure gas storage tank (6), and a seventh high-pressure switch valve (19) is provided at the other end. The seventh high-pressure switch valve (19) is connected to the sixth high-pressure switch valve (18).

2. The rapid start-stop device for starting an emergency diesel engine using high-pressure compressed air as claimed in claim 1, characterized in that: One side of the high-pressure gas storage tank (6) is connected to a first high-pressure pressure gauge (8) via a third high-pressure switch valve (9).

3. The rapid start-stop device for starting an emergency diesel engine using high-pressure compressed air as claimed in claim 1, characterized in that: A fourth high-pressure switch valve (10) is provided between the high-pressure gas storage tank (6) and the high-pressure pressure reducing device (11).

4. The rapid start-stop device for starting an emergency diesel engine using high-pressure compressed air as claimed in claim 1, characterized in that: A fifth high-pressure switch valve (13), a second high-pressure pressure gauge (14), a first high-pressure mass flow meter (15) and a second high-pressure check valve (16) are sequentially arranged between the high-pressure air accumulator (12) and the diesel engine (17), and a spare pipeline (26) is located between the high-pressure air accumulator (12) and the fifth high-pressure switch valve (13).

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