CN115628165A

CN115628165A - Fuel supply device

Info

Publication number: CN115628165A
Application number: CN202211260888.3A
Authority: CN
Inventors: 王慧珺; 黑小芙; 钱跃华; 邵澍晖; 王传娟
Original assignee: China Shipbuilding Power Engineering Institute Co Ltd
Current assignee: China Shipbuilding Power Engineering Institute Co Ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-01-20

Abstract

The invention belongs to the technical field of ship power systems, and discloses a fuel supply device, which comprises a fuel injection valve, a fuel supply mechanism, a purge gas supply mechanism, a conveying pipeline and an air supply mechanism, wherein the fuel supply mechanism is configured to supply fuel to the fuel injection valve; the purge gas supply mechanism is positioned at the downstream of the fuel supply mechanism; the conveying pipeline comprises an inner layer pipe and an outer layer pipe which are coaxially sleeved, an interlayer space is formed between the inner layer pipe and the outer layer pipe, a purge gas supply mechanism is configured to supply purge gas to the inner layer pipe, a fuel supply mechanism, the purge gas supply mechanism and a fuel injection valve are communicated through the conveying pipeline, and the inner layer pipe is configured to allow fuel to pass through; the air supply mechanism includes an air source in communication with the plenum configured to provide air to the plenum. The fuel supply device has reliable operation and high safety, and can prevent the leakage concentration of the fuel from exceeding a safety threshold.

Description

Fuel supply device

Technical Field

The invention relates to the technical field of ship power systems, in particular to a fuel supply device.

Background

In the large background of green low carbon and even zero carbon driving of ships, the ships gradually adopt low carbon fuel as engine fuel on a large scale. Among them, methanol fuel is one of the best fuels that can achieve zero carbon drive. The methanol fuel supply device is a key component in the methanol engine, is arranged between an auxiliary engine supply pipeline and the methanol engine and has the main functions of methanol filtration, methanol gas supply control, methanol pressure automatic adjustment, inert gas purging, methanol leakage alarm and the like. Although methanol fuel is considered as a potential low-carbon alternative fuel, the strong toxicity of its fuel itself puts higher safety requirements on the design of its associated power plant. Therefore, the methanol fuel supply device is required to have not only reliability of operation but also safety of use.

Therefore, a fuel supply device is needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a fuel supply device which is reliable in operation, high in safety and capable of preventing the leakage concentration of fuel from exceeding a safety threshold.

In order to achieve the purpose, the invention adopts the following technical scheme:

a fuel supply apparatus comprising: a fuel injection valve, a fuel supply mechanism, a purge gas supply mechanism, a delivery pipe, and an air supply mechanism, the fuel supply mechanism being configured to supply fuel to the fuel injection valve; the purge gas supply mechanism is located downstream of the fuel supply mechanism; the conveying pipeline comprises an inner layer pipe and an outer layer pipe which are coaxially sleeved, an interlayer space is formed between the inner layer pipe and the outer layer pipe, the purge gas supply mechanism is configured to supply purge gas to the inner layer pipe, the fuel supply mechanism, the purge gas supply mechanism and the fuel injection valve are communicated through the conveying pipeline, and the inner layer pipe is configured to allow the fuel to pass through; the air supply mechanism comprises an air source which is communicated with the interlayer space and is configured to provide air for the interlayer space.

In a preferred embodiment of the fuel supply apparatus according to the present invention, the delivery pipe includes a delivery main pipe and a delivery branch pipe, the delivery branch pipe communicates with the delivery main pipe, the fuel supply mechanism and a part of the purge gas supply mechanism are disposed at one end of the delivery main pipe, the air source is disposed at the other end of the delivery main pipe, and the fuel injection valve is disposed at the delivery branch pipe and communicates with an inner pipe of the delivery branch pipe.

As a preferable aspect of the fuel supply device provided by the present invention, the fuel supply mechanism includes a fuel source and a fuel supply valve, and the fuel supply valve is disposed in the inner pipe of the delivery main pipe and configured to control communication or disconnection between the inner pipe of the delivery main pipe and the fuel source.

As a preferable aspect of the fuel supply apparatus provided by the present invention, the purge gas supply mechanism includes a purge gas source and a purge gas supply valve, and the purge gas supply valve is arranged in the inner pipe of the transport main pipe and configured to control communication or disconnection between the inner pipe of the transport main pipe and the purge gas source.

As a preferable mode of the fuel supply device provided by the present invention, the purge gas supply mechanism further includes a pneumatic purge valve, the pneumatic purge valve is disposed at an end of the inner pipe of the main delivery pipe, the end being away from the purge gas supply valve, and the pneumatic purge valve is capable of controlling opening and closing of an outlet of the inner pipe of the main delivery pipe.

As a preferable aspect of the fuel supply apparatus provided by the present invention, the air supply mechanism further includes an air extracting fan disposed at an end of the conveying pipe remote from the air source, and configured to suck air in the interlayer space.

As a preferable aspect of the fuel supply apparatus provided by the present invention, further comprising a fuel detector disposed in the sandwiched space and configured to detect an amount of fuel leakage in the sandwiched space.

As a preferable aspect of the fuel supply apparatus provided by the present invention, the fuel supply apparatus further includes a drain collection mechanism, and the drain collection mechanism includes a drain collection tank, and the drain collection tank is communicated with the interlayer space and configured to collect the leaked fuel in the interlayer space.

As a preferable aspect of the fuel supply apparatus provided by the present invention, the drain collection mechanism further includes a drain valve disposed downstream of the drain collection tank and capable of controlling opening or closing of an outlet of the drain collection tank.

As a preferable aspect of the fuel supply apparatus provided by the present invention, the fuel supply apparatus further includes a fuel condition detection mechanism including a temperature sensor and a pressure sensor, the temperature sensor and the pressure sensor being disposed in the delivery pipe and configured to sense a condition of the fuel in the inner pipe.

The invention has the beneficial effects that:

the fuel supply device provided by the invention comprises a fuel injection valve, a fuel supply mechanism, a scavenging gas supply mechanism, a conveying pipeline and an air supply mechanism. The fuel injection valve is used for injecting fuel. The fuel supply mechanism is configured to supply fuel to the fuel injection valve. The purge gas supply mechanism is located downstream of the fuel supply mechanism and configured to supply purge gas to the delivery pipe. The conveying pipeline comprises an inner layer pipe and an outer layer pipe which are coaxially sleeved, an interlayer space is formed between the inner layer pipe and the outer layer pipe, and the scavenging gas supply mechanism is configured to supply scavenging gas to the inner layer pipe when the fuel supply mechanism does not work. The fuel supply mechanism, the purge gas supply mechanism, and the fuel injection valve are communicated through the delivery pipe, and the inner pipe is configured to pass the fuel. The air supply mechanism includes an air source in communication with the plenum space configured to provide air to the plenum space. That is to say, when fuel feed mechanism normally worked, air feed mechanism can keep the intermediate layer space continuous ventilation for once the fuel in the inlayer pipe leaks to the intermediate layer space, just can carry out forced draft through the air that circulates in the intermediate layer space and discharge the conveying pipeline, guarantee safety.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a fuel supply apparatus according to an embodiment of the present invention.

In the figure:

1. a fuel injection valve;

2. a fuel supply mechanism; 21. a fuel source; 22. a fuel supply valve;

3. a purge gas supply mechanism; 31. a source of purge gas; 32. a purge gas supply valve; 33. a pneumatic purge valve;

4. a delivery line; 41. a main conveying pipe; 411. a fuel tube expansion joint; 412. an accumulator; 42. a delivery branch pipe;

51. an air source; 52. an air extracting fan;

6. a fuel detector;

7. a bleed collection mechanism; 71. discharging the collection tank; 72. a relief valve; 73. a liquid level sensor;

8. a fuel state detection mechanism; 81. a temperature sensor; 82. a pressure sensor.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Fig. 1 is a schematic structural view of a fuel supply apparatus according to an embodiment of the present invention. Referring to fig. 1, the present embodiment provides a fuel supply apparatus that includes a fuel injection valve 1, a fuel supply mechanism 2, a purge gas supply mechanism 3, a delivery pipe 4, and an air supply mechanism.

Specifically, the fuel injection valve is used for injecting methanol fuel. The fuel supply mechanism 2 is configured to supply methanol fuel to the fuel injection valve 1. The purge gas supply mechanism 3 is located downstream of the fuel supply mechanism 2 and is capable of supplying purge gas to the delivery pipe 4. The conveying pipeline 4 comprises an inner layer pipe and an outer layer pipe which are coaxially sleeved, an interlayer space is formed between the inner layer pipe and the outer layer pipe, and the scavenging gas supply mechanism 3 is configured to supply scavenging gas to the inner layer pipe when the fuel supply mechanism 2 does not work. The fuel supply mechanism 2, the purge gas supply mechanism 3, and the fuel injection valve 1 are communicated through the delivery pipe 4, and the inner pipe is configured to pass the fuel. The air supply mechanism comprises an air source 51, the air source 51 being in communication with the plenum space and configured to provide air to the plenum space. That is, when the fuel supply mechanism 2 works normally, the air supply mechanism can keep the interlayer space to be ventilated continuously, so that once the fuel in the inner layer pipe leaks into the interlayer space, the fuel can be forced to be ventilated through the air circulating in the interlayer space and discharged out of the conveying pipeline 4, and safety is guaranteed.

Specifically, the delivery pipe 4 includes a delivery main pipe 41 and a delivery branch pipe 42, the delivery branch pipe 42 communicates with the delivery main pipe 41, the fuel supply mechanism 2 and a part of the purge gas supply mechanism 3 are disposed at one end of the delivery main pipe 41, the air source 51 is disposed at the other end of the delivery main pipe 41, and the fuel injection valve 1 is disposed at the delivery branch pipe 42, communicating with an inner pipe of the delivery branch pipe 42. The inner pipe of the main transport pipe 41 and the inner pipe of the branch transport pipe 42 communicate with each other, and the interlayer space of the main transport pipe 41 and the interlayer space of the branch transport pipe 42 communicate with each other. In this embodiment, three delivery branch pipes 42 are arranged on the delivery main pipe 41 at intervals, and one fuel injection valve 1 is connected to the end of each delivery branch pipe 42.

Still specifically, the fuel supply mechanism 2 includes a fuel source 21 and a fuel supply valve 22, and the fuel supply valve 22 is disposed at an inlet of an inner pipe of the delivery main pipe 41, and is configured to control communication or disconnection between the inner pipe of the delivery main pipe 41 and the fuel source 21. When the fuel supply valve 22 is opened, the methanol fuel in the fuel source 21 can enter the inner pipe of the delivery main pipe 41 and be introduced into the fuel injection valve 1 through the delivery branch pipe 42, with the fuel supply apparatus in the operating mode.

With continued reference to fig. 1, the purge gas supply mechanism 3 includes a purge gas source 31 and a purge gas supply valve 32, the purge gas supply valve 32 being located at an inlet of the inner pipe disposed in the delivery main pipe 41 and configured to control communication or disconnection of the inner pipe of the delivery main pipe 41 and the purge gas source 31. When the fuel supply valve 22 is closed, the purge gas supply valve 32 is opened, and the purge gas in the purge gas source 31 can be introduced into the inner tube of the transfer line 4 to be purged, and the fuel supply apparatus is in the purge mode.

Specifically, the purge gas supply mechanism 3 further includes a pneumatic purge valve 33, the pneumatic purge valve 33 is disposed at an end of the inner pipe of the main delivery pipe 41 away from the purge gas supply valve 32, and the pneumatic purge valve 33 can control opening and closing of an outlet of the inner pipe of the main delivery pipe 41. By opening the pneumatic purge valve 33 and the purge gas supply valve 32, a purge passage can be formed in the inner tube of the transfer line 4, and the purge gas can be discharged from the outlet of the inner tube of the transfer main pipe 41 out of the transfer line 4 through the pneumatic purge valve 33.

With continued reference to FIG. 1, the air supply mechanism further includes an extractor fan 52, the extractor fan 52 being disposed at an end of the main conveyor pipe 41 remote from the air source 51 and configured to draw air in the plenum of the main conveyor pipe 41. Through the above arrangement, the induced draft fan 52 can be matched with the air source 51, continuously pumps the air in the air source 51 into the interlayer space of the main conveying pipe 41, and flows through the interlayer space of the branch conveying pipe 42, so as to take out the leaked methanol in the interlayer space from the conveying pipeline 4.

Specifically, the fuel supply apparatus further includes a fuel detector 6, the fuel detector 6 being disposed in the sandwiched space, configured to detect an amount of fuel leakage in the sandwiched space. The fuel detector 6 may be a methanol detector in the prior art, which is not described herein in detail for the structure and principle of this embodiment. When the limit of methanol detected by the fuel detector 6 exceeds the standard, it is judged that a large amount of methanol in the inner pipe of the transfer pipe 4 leaks into the sandwiched space, at this time, the fuel supply valve 22 is closed, the shutdown process is performed, and then the purge gas supply valve 32 and the pneumatic purge valve 33 are opened to place the fuel supply apparatus in the purge mode.

More specifically, the fuel supply device further includes a drain collecting mechanism 7, and the drain collecting mechanism 7 includes a drain collecting tank 71, and the drain collecting tank 71 is communicated with the interlayer space, is located upstream of the pneumatic purge valve 33, and is configured to collect and temporarily store the leaked fuel in the interlayer space.

Preferably, the drain collection mechanism 7 further comprises a level sensor 73, the level sensor 73 being mounted on a side of the drain collection tank 71 and being capable of indicating the level of methanol in the drain collection tank 71. When the liquid level sensor 73 detects that the amount of the leaked methanol accumulated in the drain collection tank 71 reaches a threshold value, it is judged that a large amount of methanol in the inner pipe leaks into the sandwiched space, at which time the fuel supply valve 22 is closed, the shutdown process is performed, and the purge mode is turned on, and the methanol fuel in the inner pipe of the delivery main pipe 41, the methanol fuel in the inner pipe of each delivery branch pipe 42, and the methanol fuel in each fuel injection valve 1 are discharged. And meanwhile, the air supply mechanism is utilized to ventilate the interlayer space.

More specifically, the drain collection mechanism 7 further includes a drain valve 72, and the drain valve 72 is disposed downstream of the drain collection tank 71 and is capable of controlling the opening or closing of the outlet of the drain collection tank 71. When the purge valve 72 is opened, the methanol in the purge collection tank 71 can be purged.

With continued reference to fig. 1, the fuel supply apparatus provided in the present embodiment further includes a fuel state detection mechanism 8, the fuel state detection mechanism 8 includes a temperature sensor 81 and a pressure sensor 82, the temperature sensor 81 and the pressure sensor 82 are disposed in the delivery pipe 4 and configured to sense the state of the fuel in the inner pipe, that is, the temperature sensor 81 and the pressure sensor 82 can detect the temperature and the pressure of the methanol in the inner pipe, respectively, and an operator can adjust the fuel source 21 according to the methanol temperature indicated by the temperature sensor 81 and the methanol pressure indicated by the pressure sensor 82 to maintain the stability of the methanol supply.

Preferably, the delivery main pipe 41 of the present embodiment is provided with a fuel pipe expansion joint 411 at a distance to form a larger pipe volume for maintaining the pressure of the methanol fuel in the delivery pipe 4 stable. Further, an accumulator 412 is disposed in the main delivery pipe 41 to further stabilize the pressure of the methanol fuel. The accumulator 412 is conventional, and the structure and principle of this embodiment will not be described herein.

When the fuel supply device provided by the embodiment is in the working mode, the methanol fuel supply and the interlayer space ventilation are simultaneously carried out. The fuel supply valve 22 is opened, and the purge gas supply valve 32 and the pneumatic purge valve 33 are closed. Methanol enters from the inlet of the inner pipe of the main conveying pipe 41 and enters the inner pipe of the main conveying pipe 41 through the fuel supply valve 22; then, the methanol enters the plurality of fuel injection valves 1 through the plurality of delivery branch pipes 42, thereby completing the function of the fuel injection valves 1, and the methanol sprayed from the fuel injection valves 1 enters the engine to start combustion work, so as to provide power for the ship.

When the methanol fuel is supplied, the exhaust fan 52 and the bleed valve 72 are opened, air in the air source enters the interlayer space of the main conveying pipe 41 and then enters the interlayer space of the branch conveying pipe 42, and the methanol in the interlayer space of each pipe is entrained in the air and discharged out of the conveying pipe 4.

When the fuel supply device provided by the present embodiment is in the purge mode, the fuel supply valve 22 is closed, and the purge gas supply valve 32 and the pneumatic purge valve 33 are opened to form a purge path, at which the purge gas enters from the inlet of the inner pipe of the main delivery pipe 41 and flows through the inner pipe of the branch delivery pipe 42 to perform the methanol purge, and finally the purge gas flows out through the outlet of the inner pipe of the main delivery pipe 41.

The fuel supply apparatus provided in the present embodiment may also be in a safe mode that is executed when methanol in the inner pipe of the delivery pipe 4 leaks abnormally. If the fuel detector 6 detects that the methanol content in the interlayer space of the conveying pipeline 4 exceeds the upper limit, or the liquid level sensor 73 detects that the amount of leaked methanol accumulated in the drainage collection tank 71 reaches a threshold value, it is judged that a large amount of methanol in the inner pipe of the conveying pipeline 4 leaks into the interlayer space of the conveying pipeline 4, at the moment, a purging mode is started, ventilation of the interlayer space of the conveying pipeline 4 is carried out, and the ventilation process is the same as the working mode.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A fuel supply apparatus, characterized by comprising:

a fuel injection valve (1);

a fuel supply mechanism (2) configured to supply fuel to the fuel injection valve (1);

a purge gas supply mechanism (3) located downstream of the fuel supply mechanism (2);

a conveying pipeline (4) comprising an inner layer pipe and an outer layer pipe which are coaxially sleeved, wherein an interlayer space is formed between the inner layer pipe and the outer layer pipe, the purge gas supply mechanism (3) is configured to supply purge gas to the inner layer pipe, the fuel supply mechanism (2), the purge gas supply mechanism (3) and the fuel injection valve (1) are communicated through the conveying pipeline (4), and the inner layer pipe is configured to allow the fuel to pass through;

the air supply mechanism comprises an air source (51), wherein the air source (51) is communicated with the interlayer space and is configured to provide air for the interlayer space.

2. The fuel supply apparatus according to claim 1, wherein the delivery pipe (4) includes a delivery main pipe (41) and a delivery branch pipe (42), the delivery branch pipe (42) communicates with the delivery main pipe (41), the fuel supply mechanism (2) and a part of the purge gas supply mechanism (3) are disposed at one end of the delivery main pipe (41), the air source (51) is disposed at the other end of the delivery main pipe (41), and the fuel injection valve (1) is disposed at the delivery branch pipe (42) to communicate with an inner pipe of the delivery branch pipe (42).

3. The fuel supply device according to claim 2, characterized in that the fuel supply mechanism (2) comprises a fuel source (21) and a fuel supply valve (22), the fuel supply valve (22) being arranged at an inner pipe of the delivery main pipe (41) and configured to control communication or disconnection of the inner pipe of the delivery main pipe (41) and the fuel source (21).

4. The fuel supply apparatus according to claim 2, wherein the purge gas supply mechanism (3) includes a purge gas source (31) and a purge gas supply valve (32), the purge gas supply valve (32) being disposed at the inner pipe of the delivery main pipe (41) and configured to control communication or disconnection of the inner pipe of the delivery main pipe (41) and the purge gas source (31).

5. The fuel supply apparatus according to claim 4, wherein the purge gas supply mechanism (3) further comprises a pneumatic purge valve (33), the pneumatic purge valve (33) is disposed at an end of the inner pipe of the main delivery pipe (41) away from the purge gas supply valve (32), and the pneumatic purge valve (33) is capable of controlling opening and closing of an outlet of the inner pipe of the main delivery pipe (41).

6. The fuel supply arrangement according to claim 2, characterized in that the air supply mechanism further comprises an extractor fan (52), which extractor fan (52) is arranged at the end of the conveying pipe (4) remote from the air source (51) and is configured to suck air in the sandwich space.

7. The fuel supply arrangement according to claim 1, further comprising a fuel detector (6), the fuel detector (6) being arranged in the interlayer space, configured to detect an amount of fuel leakage in the interlayer space.

8. The fuel supply apparatus according to claim 1, further comprising a drain collection mechanism (7), wherein the drain collection mechanism (7) comprises a drain collection tank (71), and the drain collection tank (71) is communicated with the interlayer space and configured to collect the leaked fuel in the interlayer space.

9. The fuel supply arrangement according to claim 8, characterized in that the blowdown collecting mechanism (7) further comprises a blowdown valve (72), the blowdown valve (72) being arranged downstream of the blowdown collecting tank (71), being able to control the opening or closing of the outlet of the blowdown collecting tank (71).

10. The fuel supply apparatus according to claim 1, further comprising a fuel condition detection mechanism (8), the fuel condition detection mechanism (8) including a temperature sensor (81) and a pressure sensor (82), the temperature sensor (81) and the pressure sensor (82) being arranged in the delivery pipe (4) and configured to sense a fuel condition in the inner pipe.