CN217652835U

CN217652835U - Marine gas supply system

Info

Publication number: CN217652835U
Application number: CN202221206758.7U
Authority: CN
Inventors: 吴远跃; 唐靖; 刘宗辉; 朱建魁
Original assignee: Weichai Heavy Machinery Co Ltd; Chongqing Weichai Engine Co Ltd
Current assignee: Weichai Heavy Machinery Co Ltd; Chongqing Weichai Engine Co Ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2022-10-25
Anticipated expiration: 2032-05-19

Abstract

The utility model discloses a marine gas supply system belongs to and wears and shows technical field, including the engine and with the gas supply pipeline of the gas pipe intercommunication of engine, the engine is including the chamber of admitting air of supplying with the air, its characterized in that, install the formula of relying on oneself pressure difference governing valve on the gas supply pipeline, the control pressure chamber of formula of relying on oneself pressure difference governing valve pass through the pressure feedback pipe with the chamber intercommunication of admitting air, this design can be according to the gas pressure of engine air boost pressure regulation engine, makes the gas pressure that gets into the gas pipe and boost pressure remain the constant pressure value throughout to guarantee safety, the reliability of engine gas supply.

Description

Marine gas supply system

Technical Field

The utility model belongs to the technical field of wear to show, concretely relates to marine gas supply system.

Background

Although the world economy is still rapidly developing and the scientific technology is rapidly advancing, the problems facing human beings are seemingly increasing, the global climate is continuously deteriorating, and the consumption of fossil fuels is almost exhausted, and under the two serious problems, people have to find an effective and environment-friendly method to solve the current problems, especially for the world ship industry. Due to the rising price of the product oil, the international pollution convention becomes stricter and stricter, so that the whole ship industry has to seek a new solution. Marine LNG technology seems to bring hopes that it is not only clean, but also abundant, even richer than petroleum reserves.

In order to ensure the safety and reliability of the LNG single-fuel ship engine, the use requirements of a fuel gas injection system under various working conditions need to be met, a constant differential pressure value needs to be kept between the fuel gas pressure required by the engine and the supercharged air pressure, and a device for reasonably controlling the gas supply quantity is not provided in the prior art. And the engine room is provided with a main engine, an auxiliary engine and other equipment, various powers are provided for the ship, the ship is a relatively high-temperature closed place, and if gas leaks in the engine room, great potential safety hazards are brought.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the marine fuel gas supply system can adjust the fuel gas pressure of the engine according to the air supercharging pressure of the engine, and ensure the safety and reliability of fuel gas supply of the engine.

In order to solve the technical problem, the technical scheme of the utility model is that:

a fuel gas supply system for a ship comprises an engine and a fuel gas supply pipeline communicated with a fuel gas pipe of the engine, wherein the engine comprises an air inlet cavity for supplying air, a self-operated differential pressure regulating valve is installed on the fuel gas supply pipeline, and a control pressure cavity of the self-operated differential pressure regulating valve is communicated with the air inlet cavity through a pressure feedback pipe.

Furthermore, a first vent pipe with the other end extending out of the cabin is arranged on the fuel gas supply pipeline, a first cut-off valve is mounted on the first vent pipe, and the first cut-off valve is electrically connected with the engine control unit.

Further, the first cut-off valve is a normally open cut-off valve.

Furthermore, the gas supply pipeline outside is provided with inclosed protecting tube, install on the protecting tube and be used for detecting the sensor of gas concentration in the protecting tube, install the second trip valve on the gas supply pipeline, the sensor with the second trip valve respectively with the engine control unit electricity is connected.

Furthermore, a second vent pipe with the other end extending out of the cabin is arranged on the protective pipe.

Further, the second cut-off valve is a normally closed cut-off valve.

Furthermore, the first cut-off valve and the second cut-off valve are electrically connected to an electromagnetic valve control box through communication cables respectively, and the electromagnetic valve control box is electrically connected to the engine control unit through the communication cables.

Further, a filter is installed on the gas supply pipeline.

Furthermore, the first vent pipe, the filter, the second stop valve and the self-operated differential pressure regulating valve are sequentially arranged on the gas supply pipeline from a gas inlet to the gas pipe.

After the technical scheme is adopted, the beneficial effects of the utility model are that:

because the utility model discloses a marine gas supply system includes the engine and with the gas supply pipeline of the gas pipe intercommunication of engine, the engine is including the chamber of admitting air of supplying with the air, install self-operated differential pressure regulating valve on the gas supply pipeline, the control pressure chamber of self-operated differential pressure regulating valve passes through the pressure feedback pipe and admits air the chamber intercommunication, according to the gas pressure of engine air pressure boost pressure regulation engine, the gas pressure that makes the entering gas pipe keeps the constant pressure value with pressure boost pressure value all the time, thereby guarantee the safety of engine gas supply, reliable.

Drawings

FIG. 1 is a schematic structural view of a gas supply system for a ship according to the present invention;

in the figure, 1-a gas supply pipeline, 2-a first vent pipe, 3-a first cut-off valve, 4-a filter, 5-a second cut-off valve, 6-a self-operated differential pressure regulating valve, 7-an engine, 8-a gas pipe, 9-an air inlet cavity, 10-a pressure feedback pipe, 11-a protective pipe, 12-a sensor, 13-a second vent pipe, 14-a communication cable, 15-an engine control unit and 16-a solenoid valve control box.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

All the directions referred to in the present specification are based on the drawings, and only represent relative positional relationships, not absolute positional relationships, and in fig. 1, a solid line is a gas path, and a dotted line is a circuit.

As shown in fig. 1, a marine gas supply system includes an engine 7 and a gas supply pipeline 1 communicated with a gas pipe 8 of the engine 7, the engine 7 includes an air inlet chamber 9 for supplying air, a self-operated differential pressure regulating valve 6 is installed on the gas supply pipeline 1, and a control pressure chamber of the self-operated differential pressure regulating valve 6 is communicated with the air inlet chamber 9 through a pressure feedback pipe 10, so that a constant pressure difference value is always maintained between the gas pressure entering the gas pipe 8 and the supercharged air pressure, thereby ensuring the safety and reliability of the gas supply of the engine 7.

As shown in fig. 1, a first vent pipe 2 with the other end extending out of the cabin is arranged on the fuel gas supply pipeline 1, a first cut-off valve 3 is mounted on the first vent pipe 2, and the first cut-off valve 3 is electrically connected with an engine control unit 15. Wherein, the first cut-off valve 3 is a normally open cut-off valve. When the engine 7 is normally stopped or is stopped due to a failure, residual fuel gas in the fuel gas supply line 1 is discharged to a safe place outside the cabin through the first vent pipe 2.

As shown in fig. 1, a sealed protection pipe 11 is arranged outside the gas supply pipeline 1, a sensor 12 for detecting the concentration of the gas in the protection pipe 11 is installed on the protection pipe 11, a second cut-off valve 5 is installed on the gas supply pipeline 1, and the sensor 12 and the second cut-off valve 5 are electrically connected with an engine control unit 15 respectively. Wherein, the second cut-off valve 5 is a normally closed cut-off valve. The protective pipe 11 is provided with a second vent pipe 13 of which the other end extends out of the cabin. The closed protective pipe 11 can prevent gas from leaking into the closed space of the cabin and causing potential safety hazards, and the life safety and property safety of personnel on the ship are protected. And when the gas supply pipeline 1 leaks, the gas can be discharged to the safety place outside the cabin through the second vent pipe 13, and cannot enter the closed space of the cabin, so that potential safety hazards are caused.

As shown in fig. 1, the first cut valve 3 and the second cut valve 5 are electrically connected to a solenoid valve control box 16 through a communication cable 14, the solenoid valve control box 16 is electrically connected to an engine control unit 15 through the communication cable 14, and the solenoid valve control box 16 that controls the first cut valve 3 and the second cut valve 5 is provided so as not to be directly connected to the engine control unit 15, thereby reducing the possibility of malfunction and the like by reducing the interference of erroneous signals.

As shown in fig. 1, a filter 4 is mounted on the gas supply line 1. The gas supply pipeline 1 is provided with a first vent pipe 2, a filter 4, a second stop valve 5 and a self-operated differential pressure regulating valve 6 in sequence from a gas inlet to a gas pipe 8.

The specific working principle of the marine gas supply system of the application is as follows:

(1) When the engine 7 is started: the engine control unit 15 sends a command to the solenoid valve control box 16, and the solenoid valve control box 16 controls the first shut-off valve 3 to close and the second shut-off valve 5 to open. The fuel gas enters the fuel gas engine 7 through the filter 4, the second stop valve 5 and the self-operated differential pressure regulating valve 6, and meanwhile, the self-operated differential pressure regulating valve 6 automatically regulates the pressure behind the self-operated differential pressure regulating valve 6 through the pressure of the pressurized air fed back by the pressure feedback pipe 10, so that the pressure of the fuel gas entering the fuel gas pipe 8 and the pressure of the pressurized air are always kept at a constant pressure difference value, and the use requirement of the fuel gas injection control system is met.

(2) When the engine 7 is normally stopped or is stopped due to a failure, the engine control unit 15 sends a command to the solenoid valve control box 16, and the solenoid valve control box 16 controls the first shut-off valve 3 to be opened and the second shut-off valve 5 to be closed. The gas supply of the engine 7 is cut off and at the same time the residual gas in the pipe is discharged to the safety place outside the cabin through the first permeability tube 2.

(3) In the operation process of the engine 7, if the sensor 12 detects that the gas supply pipeline 1 has gas leakage, the engine control unit 15 sends an instruction to the electromagnetic valve control box 16 to control the corresponding valve to open and close to close the gas supply pipeline 1, so that invalid consumption of the gas is prevented, meanwhile, a standby supply pipeline (not shown in the figure) is started, the engine 7 is prevented from being stopped, the cruising ability of the whole ship is ensured, and the operation cost of a user is reduced.

The utility model discloses a marine gas supply system is through installing self-operated pressure difference regulating valve on gas supply pipeline, and the control pressure chamber of self-operated pressure difference regulating valve passes through the pressure feedback pipe and feeds through with the chamber of admitting air of supplying with the engine air, according to the gas pressure of engine air pressure boost pressure regulation engine, makes the gas pressure and the pressure boost pressure that get into the gas pipe remain invariable differential pressure value all the time to guarantee safety, the reliability of engine gas supply.

Although specific embodiments of the present invention have been described above, it should be understood by those skilled in the art that the described embodiments are only some of the embodiments of the present invention, rather than all embodiments, which are given by way of illustration only, and the scope of the present invention is defined by the appended claims. Without any inventive step, those skilled in the art can make various changes or modifications to the embodiments without departing from the spirit and scope of the present invention.

Claims

1. A fuel gas supply system for a ship comprises an engine and a fuel gas supply pipeline communicated with a fuel gas pipe of the engine, wherein the engine comprises an air inlet cavity for supplying air, and the fuel gas supply pipeline is provided with a self-operated differential pressure regulating valve, and a control pressure cavity of the self-operated differential pressure regulating valve is communicated with the air inlet cavity through a pressure feedback pipe.

2. The marine gas supply system according to claim 1, wherein a first vent pipe having the other end extending out of the cabin is provided on the gas supply line, and a first cut-off valve is mounted on the first vent pipe and electrically connected to the engine control unit.

3. The marine gas supply system of claim 2, wherein the first shut-off valve is a normally open shut-off valve.

4. The marine gas supply system according to claim 2, wherein a sealed protection pipe is arranged outside the gas supply pipeline, a sensor for detecting the gas concentration in the protection pipe is mounted on the protection pipe, a second cut-off valve is mounted on the gas supply pipeline, and the sensor and the second cut-off valve are respectively electrically connected with the engine control unit.

5. The marine gas supply system according to claim 4, wherein the shielding pipe is provided with a second vent pipe having the other end protruding out of the cabin.

6. The marine gas supply system of claim 4, wherein the second shut-off valve is a normally closed shut-off valve.

7. The marine gas supply system according to claim 4, wherein the first shut-off valve and the second shut-off valve are electrically connected to a solenoid-operated valve control box through communication cables, respectively, and the solenoid-operated valve control box is electrically connected to the engine control unit through communication cables.

8. The marine gas supply system according to any one of claims 4 to 7, wherein a filter is installed on the gas supply line.

9. The marine gas supply system according to claim 8, wherein the first vent pipe, the filter, the second shut-off valve, and the self-operated differential pressure regulating valve are installed on the gas supply line in this order from a gas inlet to the gas pipe.