CN215109184U

CN215109184U - Ship LNG double-fuel-gas safety control system

Info

Publication number: CN215109184U
Application number: CN202121194356.5U
Authority: CN
Inventors: 尹成国; 杨宇楠; 王高飞; 尹梦
Original assignee: Zhongshan Jixiao Intelligent Technology Co ltd
Current assignee: Zhongshan Jixiao Intelligent Technology Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-12-10
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses a two gas safety control system of steamer LNG, including first double-walled pipe, the second double-walled pipe, first engine unit, the second engine unit, the inlet fluid pipeline, the liquid storage pot, main liquid pipe, vaporizer and main gas pipe, the fuel output of the steerable liquid storage pot of main liquid valve of main liquid pipe, level sensor is installed to the liquid storage pot, fluid reservoir temperature sensor and fluid reservoir baroceptor can carry out the temperature to the liquid storage pot, atmospheric pressure, the all-round control of liquid level, gas pressure sensor is installed to main gas pipe, the gas pressure of real-time supervision main gas pipe, can carry out fluid reservoir atmospheric pressure regulation and control through the muffler when liquid storage pot atmospheric pressure is unusual, first double-walled pipe and second double-walled pipe all are provided with the combustible gas detection structure, real-time supervision acquires the gas condition of carrying the engine, ensure that engine unit can the safe and reliable ground operation work, whole two gas safety control system is to the liquid storage pot, The engine set and each pipeline are monitored and controlled in real time, and abnormal events can be timely known and processed through corresponding valves when the abnormality occurs.

Description

Ship LNG double-fuel-gas safety control system

Technical Field

The utility model relates to a ship combustible gas safety coefficient, especially a steamer LNG dual fuel gas safety control system.

Background

The traditional ship adopts diesel oil as main fuel, has high cost and NOx and SOx emission, is replaced by clean, environment-friendly, economic and efficient LNG, and is of great importance to the safety performance of a ship adopting LNG fuel, but the existing LNG security system has incomplete functions, cannot perform real-time and comprehensive gas tank filling monitoring, gas tank gas supply valve control, engine monitoring and the like on the ship, and has weak fault warning and processing capabilities.

Disclosure of Invention

In order to overcome the not enough of prior art, the utility model provides a two gas safety control system of steamer LNG.

The utility model provides a technical scheme that its technical problem adopted is:

a ship LNG double-fuel gas safety control system comprises a first double-wall pipe, a second double-wall pipe, a first engine set, a second engine set, a liquid inlet pipeline, a liquid storage tank, a main liquid pipe, a gasifier and a main fuel gas pipe which are sequentially connected, the exhaust end of the main gas pipe is divided into two paths, one path is communicated with the first engine set through the first double-wall pipe, the other path is communicated with the second engine set through the second double-wall pipe, the main liquid pipe is provided with a main liquid valve, the liquid storage tank is provided with a liquid level sensor and a liquid tank temperature sensor, the top of the liquid storage tank is provided with a liquid tank air pressure sensor, the main gas pipe is provided with a gas pressure sensor, the top of the liquid storage tank is communicated with an air return pipe, an air return valve is installed on the air return pipe, and the inner pipe of the first double-wall pipe and the inner pipe of the second double-wall pipe are both provided with a combustible gas detection structure.

The liquid inlet pipeline comprises a liquid inlet main pipe, an upper liquid inlet pipe and a lower liquid inlet pipe, wherein a liquid filling main valve, an upper liquid filling valve and a lower liquid filling valve are respectively installed on the liquid inlet main pipe, the upper liquid inlet pipe and the lower liquid inlet pipe, the input end of the upper liquid inlet pipe and the input end of the lower liquid inlet pipe are communicated with the liquid inlet main pipe, the output end of the upper liquid inlet pipe is communicated with the top of the liquid storage tank, and the output end of the lower liquid inlet pipe is communicated with the bottom of the liquid storage tank.

The outer pipe of the first double-wall pipe is communicated with the outer pipe of the second double-wall pipe, and a fan and a wind pressure sensor are mounted on the outer pipe of the first double-wall pipe or the outer pipe of the second double-wall pipe.

And a first air supply valve and a second air supply valve are respectively installed on the inner pipe of the first double-wall pipe and the inner pipe of the second double-wall pipe.

The first engine set comprises a first engine and a first connecting pipe, a first gas detector is mounted on the first engine, a first interlocking valve is mounted on the first connecting pipe, and a first bleeding valve is arranged at the exhaust end of an inner pipe of the first double-wall pipe; one end of the first connecting pipe is communicated with the first engine, the other end of the first connecting pipe is communicated with the inner pipe of the first double-wall pipe, and the joint of the first connecting pipe and the first double-wall pipe is positioned between the first bleeding valve and the first air supply valve.

And the main gas pipe is provided with a buffer tank.

The liquid storage tank is provided with a return pipe communicated with the main liquid pipe, and the return pipe is provided with a saving valve.

An overflow pipe is arranged on the liquid storage tank, and an overflow temperature sensor is arranged on the overflow pipe.

The utility model has the advantages that: the utility model discloses a level sensor is installed to the liquid storage pot, fluid reservoir temperature sensor and fluid reservoir baroceptor can carry out the temperature to the liquid storage pot, atmospheric pressure, the all-round control of liquid level, gas pressure sensor is installed to main gas pipe, the gas pressure of real-time supervision main gas pipe, can carry out fluid reservoir atmospheric pressure regulation and control through the muffler when liquid storage pot atmospheric pressure is unusual, first double-walled pipe and second double-walled pipe all are provided with the combustible gas and detect the structure, real-time supervision acquires the gas condition of carrying engine, ensure that the engine group can the safe and reliable operation work, whole double-gas safety control system is to the liquid storage pot, engine group and each pipeline carry out monitor control in real time, can in time learn and carry out unusual incident processing through corresponding valve when unusual.

Drawings

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

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic diagram of a combustible gas detection structure;

fig. 3 is an exploded view of the gas sensor of fig. 2 with the combustible gas removed.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without creative work belong to the scope of the present invention.

The directional or positional relationships "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., are those shown in the drawings, are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention.

Referring to fig. 1, a ship LNG dual-fuel gas safety control system comprises a first dual-wall pipe 1, a second dual-wall pipe 2, a first engine set, a second engine set, and a liquid inlet pipe, a liquid storage tank 3, a main liquid pipe 4, a vaporizer 5 and a main fuel gas pipe 6 which are sequentially connected, wherein an exhaust end of the main fuel gas pipe 6 is divided into two paths, one path is communicated with the first engine set through the first dual-wall pipe 1, the other path is communicated with the second engine set through the second dual-wall pipe 2, a main liquid valve 7 is installed on the main liquid pipe 4 to control fuel gas output of the liquid storage tank 3, the liquid storage tank 3 is provided with a liquid level sensor 8 and a liquid tank temperature sensor 9, the top of the liquid storage tank 3 is provided with a liquid tank pressure sensor 10 capable of performing all-directional monitoring of temperature, air pressure and liquid level on the liquid storage tank, the main fuel gas pipe 6 is provided with a fuel gas pressure sensor 11, the gas pressure of the main gas pipe of real-time supervision, the top intercommunication of liquid storage pot 3 has muffler 12, install return air valve 13 on the muffler 12, can carry out the regulation and control of fluid reservoir atmospheric pressure through return air valve 13 when jar atmospheric pressure is unusual, all be provided with combustible gas detection structure 46 on the inner tube of first double-walled pipe 1 and the inner tube of second double-walled pipe 1, real-time supervision acquires the gas condition of carrying the engine, ensures that first engine unit and second engine unit can the safe and reliable operation work, and whole double-gas safety control system carries out real-time monitoring control to liquid storage pot, engine unit and each pipeline, can in time learn and carry out unusual incident through corresponding valve when unusual the emergence.

The liquid inlet pipeline comprises a main liquid inlet pipe 14, an upper liquid inlet pipe 15 and a lower liquid inlet pipe 16, a main liquid filling valve 17, an upper liquid filling valve 18 and a lower liquid filling valve 19 are respectively installed on the main liquid inlet pipe 14, the upper liquid inlet pipe 15 and the lower liquid inlet pipe 16, the input end of the upper liquid inlet pipe 15 and the input end of the lower liquid inlet pipe 16 are communicated with the main liquid inlet pipe 14, the output end of the upper liquid inlet pipe 15 is communicated with the top of the liquid storage tank 3, and the output end of the lower liquid inlet pipe 16 is communicated with the bottom of the liquid storage tank 3; the liquid storage tank has three filling modes: the upper liquid filling mode is that the upper liquid filling valve 18, the air return valve 13 and the liquid filling main valve 17 are opened, and LNG enters the liquid storage tank from the top; in the lower liquid filling mode, the lower liquid filling valve 19, the air return valve 13 and the liquid filling main valve 17 are opened, and LNG enters the gas tank from the bottom; in the mixed liquid filling mode, the upper liquid filling valve 18, the lower liquid filling valve 19, the air return valve 13 and the liquid filling main valve 17 are opened, and LNG enters the gas tank from the top and the top simultaneously; can adopt corresponding liquid fuel filling mode according to real-time situation and different realistic demands.

The liquid storage tank 3 is provided with a return pipe 30 communicated with the main liquid pipe 4, and the return pipe 30 is provided with a saving valve 31, so that the excessive fuel liquid delivered by the liquid storage tank 3 to the gasifier can flow back into the liquid storage tank 3, and the use of the fuel liquid of the liquid storage tank can be flexibly controlled.

The overflow pipe 32 is arranged on the liquid storage tank 3, so that excessive filling of the fuel liquid in the liquid storage tank due to out-of-control fuel liquid filling is prevented, the safety of the system is further improved, the overflow pipe 32 is provided with the overflow temperature sensor 33, the temperature of the overflow pipe is monitored, and accidents caused by overhigh temperature of the overflow pipe are avoided.

The buffer tank 29 is installed on the main gas pipe 6, so that pressure fluctuation of the main gas pipe is buffered, and the stability of the whole system is ensured.

The outer pipe of the first double-wall pipe 1 is communicated with the outer pipe of the second double-wall pipe 2, and a fan 20 and an air pressure sensor 21 are installed on the outer pipe of the first double-wall pipe 1 or the outer pipe of the second double-wall pipe 2.

The inner pipe of the first double-wall pipe 1 and the inner pipe of the second double-wall pipe 2 are respectively provided with a first gas supply valve 22 and a second gas supply valve 23, and the first gas supply valve 22 and the second gas supply valve 23 are both connected with a gas supply source for inputting combustion-supporting gas.

The first engine group comprises a first engine 24 and a first connecting pipe 25, a first gas detector 26 is installed on the first engine 24, a first interlocking valve 27 is installed on the first connecting pipe 25, and a first bleeding valve 28 is arranged at the exhaust end of the inner pipe of the first double-wall pipe 1; one end of the first connection pipe 25 is connected to the first engine 24, and the other end is connected to the inner pipe of the first double-walled pipe 1, and the connection point of the first connection pipe 25 and the first double-walled pipe 1 is located between the first blow-off valve 28 and the first air supply valve 22.

When supplying gas, the first interlock valve 27 is opened, the first relief valve 28 is closed, the gasifier starts supplying gas, the fan blows air to prevent the combustible gas of the double-wall pipe from leaking and gathering, the wind pressure sensor 21 detects the wind pressure of the outer pipe of the double-wall pipe, the combustible gas detection structure 46 detects the combustible gas in the inner pipe of the double-wall pipe, the gas pressure sensor 11 detects the gas supply condition of the main gas pipe 6, the first gas sensor 26 monitors the first engine and shuts off the engine before stopping the supply of gas, and then performs the supply stop operation, the first interlock valve 27 is closed, the first bleed valve 28 is opened, so that the gas in the inner pipe of the first double-wall pipe 1 is diffused, the main liquid valve is closed, the gasifier stops working, the structure and function of the second engine set are the same as those of the first engine set, and the first interlocking valve, the first diffusion valve, the first engine, the first connecting pipe, the first gas detector and other identical equipment components are arranged.

Referring to fig. 2 and 3, the combustible gas detection structure includes a combustible gas detector 34, a flange 35, and a connection ring 36 communicating with the inner tube of the first double-wall tube 1 (the second double-wall tube is also provided with a combustible gas detection structure, and the first double-wall tube is taken as an example for illustration), the combustible gas detector 34 is provided with an extension tube 37 and a probe 38 mounted at the end of the extension tube 37, the flange 35 is provided with a fixed port 39, after assembly, the flange 35 is fixedly connected with the connection ring 36, the extension tube 37 passes through the fixed port 39 (the outer tube of the double-wall tube is provided with a corresponding hole through which the extension tube passes), the probe 38 extends into the inner tube of the first double-wall tube 1 and then is welded to seal the gap between the fixed port 39 and the extension tube 37, the combustible gas detector is firmly fixed, and the combustible gas of the inner tube of the first double-wall tube is prevented from leaking, the model of the combustible gas detector 34 is S104-II, which has the advantages of high precision, reliable detection and low energy consumption, and the combustible gas detector has a probe, in the embodiment, the combustible gas detector is provided with an extension pipe, the probe 38 is arranged at the tail end of the extension pipe 37, a lead connected between the probe 38 and the combustible gas detector passes through the extension pipe, and the detection precision of the combustible gas detector can be further improved when the probe extends into the extension pipe.

The tail end of the connecting ring 36 protrudes outwards to form a connecting ring 40, a connecting hole 41 is formed in the connecting ring 40, a bolt hole 42 corresponding to the connecting hole 41 is formed in the flange plate 35, and a connecting bolt 43 is installed in the bolt hole 42, so that the flange plate 35 is fixedly connected with the connecting ring 36, and the whole detection structure is more convenient to install.

And a sealing gasket 44 is clamped between the flange plate 35 and the connecting ring 40, so that the sealing performance of the detection structure is further enhanced, and the combustible gas is prevented from leaking.

The sealing washer 44 is provided with a fixing hole 45 corresponding to the connecting hole 41 to prevent the sealing washer 44 from being deviated, so that the sealing washer 44 is firmly and stably fixed between the flange 35 and the connecting ring 40.

The above embodiments are not intended to limit the scope of the present invention, and those skilled in the art can make modifications and variations equivalent without departing from the overall concept of the present invention.

Claims

1. The LNG double-fuel-gas safety control system for the ship is characterized by comprising a first double-wall pipe (1), a second double-wall pipe (2), a first engine set, a second engine set, a liquid inlet pipeline, a liquid storage tank (3), a main liquid pipe (4), a gasifier (5) and a main fuel gas pipe (6) which are sequentially connected, wherein the exhaust end of the main fuel gas pipe (6) is divided into two paths, one path of exhaust end passes through the first double-wall pipe (1) to communicate with the first engine set, the other path passes through the second double-wall pipe (2) to communicate with the second engine set, a main liquid valve (7) is installed on the main liquid pipe (4), a liquid level sensor (8) and a liquid storage tank temperature sensor (9) are installed on the liquid storage tank (3), a liquid storage tank pressure sensor (10) is installed at the top of the liquid storage tank (3), and a fuel gas pressure sensor (11) is installed on the main fuel gas pipe (6), the top of the liquid storage tank (3) is communicated with an air return pipe (12), an air return valve (13) is installed on the air return pipe (12), and combustible gas detection structures are arranged on the inner pipe of the first double-wall pipe (1) and the inner pipe of the second double-wall pipe (1).

2. The ship LNG dual-fuel-gas safety control system of claim 1, wherein the liquid inlet pipeline comprises a main liquid inlet pipe (14), an upper liquid inlet pipe (15) and a lower liquid inlet pipe (16), a main liquid filling valve (17), an upper liquid filling valve (18) and a lower liquid filling valve (19) are respectively installed on the main liquid inlet pipe (14), the upper liquid inlet pipe (15) and the lower liquid inlet pipe (16), an input end of the upper liquid inlet pipe (15) and an input end of the lower liquid inlet pipe (16) are communicated with the main liquid inlet pipe (14), an output end of the upper liquid inlet pipe (15) is communicated with the top of the liquid storage tank (3), and an output end of the lower liquid inlet pipe (16) is communicated with the bottom of the liquid storage tank (3).

3. The ship LNG dual-fuel-gas safety control system according to claim 1, characterized in that the outer pipe of the first dual-wall pipe (1) is in communication with the outer pipe of the second dual-wall pipe (2), and a fan (20) and a wind pressure sensor (21) are installed on the outer pipe of the first dual-wall pipe (1) or the outer pipe of the second dual-wall pipe (2).

4. The ship LNG dual gas safety control system according to claim 1, wherein the inner pipe of the first dual wall pipe (1) and the inner pipe of the second dual wall pipe (2) are installed with a first gas supply valve (22) and a second gas supply valve (23), respectively.

5. The ship LNG dual-fuel-gas safety control system according to claim 4, characterized in that the first engine block includes a first engine (24) and a first connecting pipe (25), a first gas detector (26) is installed on the first engine (24), a first interlock valve (27) is installed on the first connecting pipe (25), and a first bleeding valve (28) is provided at an inner pipe exhaust end of the first double-walled pipe (1); one end of the first connecting pipe (25) is communicated with the first engine (24), the other end of the first connecting pipe is communicated with the inner pipe of the first double-wall pipe (1), and the joint of the first connecting pipe (25) and the first double-wall pipe (1) is positioned between the first blow-off valve (28) and the first air supply valve (22).

6. The dual LNG fuel safety control system for ship according to claim 1, wherein the main fuel gas pipe (6) is provided with a buffer tank (29).

7. The dual LNG fuel safety control system as claimed in claim 1, wherein the reserve tank (3) is provided with a return pipe (30) communicating with the main liquid pipe (4), and the return pipe (30) is provided with an economizer valve (31).

8. Ship LNG dual-fuel-gas safety control system according to claim 1, characterized in that an overflow pipe (32) is provided on the storage tank (3), and an overflow temperature sensor (33) is mounted on the overflow pipe (32).