阅读说明：本技术 一种潜用燃料电池双层供气管路系统 (Double-layer air supply pipeline system of submersible fuel cell ) 是由 王博 周睿 张玉伟 李小伟 刘昌伟 于 2021-06-22 设计创作，主要内容包括：本发明公开了一种潜用防泄漏燃料电池双层供气管路系统,包括双层管段、双层减压根阀、双层减压阀、双层单向阀和控制装置；所述双层管段包括同轴布置的内管和外管,内管为供气管路,供气管路内安装有内层压力变送器；内管与外管之间形成夹层管路,夹层管路设有充气口,夹层管路内充有保护气体并安装有夹层压力变送器；所述双层管段的供气管路分别与气源和燃料电池连通；所述双层减压根阀、双层减压阀和双层单向阀沿供气气体流向依次安装在双层管段上、各阀门和各压力变送器分别与控制装置相连。本发明的有益效果为：本发明可快速判断管路内气体是否有泄漏,响应速度快,且泄漏的气体不会扩散至潜器密闭环境中,安全可靠。(The invention discloses a double-layer air supply pipeline system of a submersible leakage-proof fuel cell, which comprises a double-layer pipe section, a double-layer pressure reducing root valve, a double-layer pressure reducing valve, a double-layer one-way valve and a control device, wherein the double-layer pipe section is provided with a first pressure reducing pipe and a second pressure reducing pipe; the double-layer pipe section comprises an inner pipe and an outer pipe which are coaxially arranged, the inner pipe is an air supply pipeline, and an inner-layer pressure transmitter is installed in the air supply pipeline; an interlayer pipeline is formed between the inner pipe and the outer pipe, the interlayer pipeline is provided with an inflation inlet, protective gas is filled in the interlayer pipeline, and an interlayer pressure transmitter is installed in the interlayer pipeline; the air supply pipeline of the double-layer pipe section is respectively communicated with an air source and the fuel cell; the double-layer pressure reducing root valve, the double-layer pressure reducing valve and the double-layer check valve are sequentially arranged on the double-layer pipe section along the flow direction of the supplied gas, and each valve and each pressure transmitter are respectively connected with the control device. The invention has the beneficial effects that: the invention can quickly judge whether the gas in the pipeline leaks or not, has high response speed, and the leaked gas cannot be diffused into the closed environment of the submersible vehicle, thereby being safe and reliable.)

1. A kind of latent anti-leakage fuel cell double-deck air supply pipeline system, characterized by that, including double-deck pipe section, double-deck pressure reducing root valve, double-deck relief pressure valve, double-deck check valve and controlling device; the double-layer pipe section comprises an inner pipe and an outer pipe which are coaxially arranged, the inner pipe is an air supply pipeline, and an inner-layer pressure transmitter is installed in the air supply pipeline; an interlayer pipeline is formed between the inner pipe and the outer pipe, the interlayer pipeline is provided with an inflation inlet, protective gas is filled in the interlayer pipeline, and an interlayer pressure transmitter is installed in the interlayer pipeline; the air supply pipeline of the double-layer pipe section is respectively communicated with an air source and the fuel cell; the double-layer pressure reducing root valve, the double-layer pressure reducing valve and the double-layer check valve are sequentially arranged on the double-layer pipe section along the flow direction of the supplied gas; the double-layer pressure reducing root valve, the double-layer pressure reducing valve and the double-layer one-way valve are all of jacket structures and comprise a valve body and an outer jacket shell, the valve body is internally provided with a valve cavity, and an interlayer space is formed between the valve body and the outer jacket shell; the valve cavity of each valve is respectively communicated with the air supply pipeline of the double-layer pipe section, and the interlayer space of each valve is respectively communicated with the interlayer pipeline of the double-layer pipe section; the double-layer pressure reducing root valve, the double-layer pressure reducing valve, the double-layer check valve, the inner layer pressure transmitter and the interlayer pressure transmitter are respectively connected with the control device; the gas pressure in the interlayer pipeline is lower than that in the gas supply pipeline and higher than the external environment pressure.

2. The double-deck gas supply pipe system according to claim 1, wherein the double-deck pipe section further comprises a plurality of support bodies circumferentially spaced apart on the outside of the inner pipe, the support bodies having a length direction that coincides with a radial direction of the inner pipe; one end of the supporting body is welded and fixed with the outer wall of the inner pipe, and the other end of the supporting body is in contact with the inner wall of the outer pipe.

3. The dual-layer gas supply line system of claim 2, wherein the end of the support body contacting the outer tube has a hemispherical structure; the support body and the outer pipe are slidable and not fixedly connected.

4. The double-deck gas supply line system of claim 2, wherein the support body is fabricated from a polytetrafluoroethylene material.

5. The dual-layer gas supply line system according to claim 1, wherein a dual-layer solenoid valve is further provided on the dual-layer pipe section between the dual-layer pressure reducing valve and the dual-layer check valve, the dual-layer solenoid valve being electrically connected to the control device; the double-layer electromagnetic valve is also of a jacket structure and comprises a valve body and an outer jacket shell, wherein a valve cavity is arranged in the valve body, and an interlayer space is formed between the valve body and the outer jacket shell; the valve cavity of the double-layer electromagnetic valve is communicated with the air supply pipeline of the double-layer pipe section, and the interlayer space of the double-layer electromagnetic valve is communicated with the interlayer pipeline of the double-layer pipe section.

6. The double-deck gas supply pipe system of claim 1, wherein the jacketed pressure transmitter is installed in the jacketed pipe upstream of the double-deck pressure relief root valve; the inner layer pressure transmitter is at least provided with two inner layer pressure transmitters, and the two inner layer pressure transmitters are respectively arranged in an air supply pipeline between the double-layer pressure reducing root valve and the double-layer pressure reducing valve and an air supply pipeline between the double-layer pressure reducing valve and the double-layer electromagnetic valve.

7. The dual-layer gas supply line system of claim 5, wherein each valve is connected to the dual-layer pipe section by a flange, the flange defining a first aperture therethrough for communicating the interlayer space of each valve with the interlayer line, and a second aperture therethrough for communicating the valve cavity of each valve with the gas supply line.

Technical Field

The invention relates to the field of ship power systems, in particular to a double-layer gas supply pipeline system of a latent fuel cell.

Background

The hydrogen-oxygen fuel cell is a device for directly converting chemical energy of hydrogen and oxygen carried by the hydrogen-oxygen fuel cell into electric energy in an electrochemical mode for supply, has the characteristics of high efficiency, small vibration noise and the like, and is an ideal novel power system of a submersible vehicle. The welding seam and the joint of the gas pipeline of the power system have leakage risks, when the common single-layer pipeline system runs, the pressure in the pipeline is influenced by a gas source and a fuel cell to fluctuate, and whether the pipeline leaks or not cannot be judged only from the pressure change; and set up corresponding gas concentration sensor in pipeline external environment, though can monitor gas leakage, but need monitor in a plurality of positions, just can arouse the change of the whole gas concentration of environment after leaking to a certain amount, also difficult to perceive which part of the while is leaking. The hydrogen and oxygen used by the hydrogen-oxygen fuel cell have the characteristics of flammability and explosiveness, and a gas supply system of the hydrogen-oxygen fuel cell cannot rapidly judge whether the gas leaks or not by adopting a single-layer pipeline, and once the dangerous gases leak into the sealed environment of the submersible vehicle, accidents such as combustion, explosion and the like can be caused.

Disclosure of Invention

The invention aims to provide a safe and reliable hidden leakage-proof double-layer air supply pipeline system with high response speed aiming at the defects of the prior art.

The technical scheme adopted by the invention is as follows: a kind of latent anti-leakage fuel cell double-deck air supply pipeline system, including double-deck pipe section, double-deck pressure reducing root valve, double-deck relief pressure valve, double-deck check valve and controlling device; the double-layer pipe section comprises an inner pipe and an outer pipe which are coaxially arranged, the inner pipe is an air supply pipeline, and an inner-layer pressure transmitter is installed in the air supply pipeline; an interlayer pipeline is formed between the inner pipe and the outer pipe, the interlayer pipeline is provided with an inflation inlet, protective gas is filled in the interlayer pipeline, and an interlayer pressure transmitter is installed in the interlayer pipeline; the air supply pipeline of the double-layer pipe section is respectively communicated with an air source and the fuel cell; the double-layer pressure reducing root valve, the double-layer pressure reducing valve and the double-layer check valve are sequentially arranged on the double-layer pipe section along the flow direction of the supplied gas; the double-layer pressure reducing root valve, the double-layer pressure reducing valve and the double-layer one-way valve are all of jacket structures and comprise a valve body and an outer jacket shell, the valve body is internally provided with a valve cavity, and an interlayer space is formed between the valve body and the outer jacket shell; the valve cavity of each valve is respectively communicated with the air supply pipeline of the double-layer pipe section, and the interlayer space of each valve is respectively communicated with the interlayer pipeline of the double-layer pipe section; the double-layer pressure reducing root valve, the double-layer pressure reducing valve, the double-layer check valve, the inner layer pressure transmitter and the interlayer pressure transmitter are respectively connected with the control device; the gas pressure in the interlayer pipeline is lower than that in the gas supply pipeline and higher than the external environment pressure.

According to the scheme, the double-layer pipe section further comprises a plurality of supporting bodies which are circumferentially arranged outside the inner pipe at intervals, and the length direction of each supporting body is consistent with the radial direction of the inner pipe; one end of the supporting body is welded and fixed with the outer wall of the inner pipe, and the other end of the supporting body is in contact with the inner wall of the outer pipe.

According to the scheme, one end of the support body, which is in contact with the outer pipe, is of a hemispheroid structure; the support body and the outer pipe are slidable and not fixedly connected.

According to the scheme, the support body is made of polytetrafluoroethylene materials.

According to the scheme, a double-layer electromagnetic valve is additionally arranged on the double-layer pipe section between the double-layer pressure reducing valve and the double-layer check valve, and the double-layer electromagnetic valve is electrically connected with the control device; the double-layer electromagnetic valve is also of a jacket structure and comprises a valve body and an outer jacket shell, wherein a valve cavity is arranged in the valve body, and an interlayer space is formed between the valve body and the outer jacket shell; the valve cavity of the double-layer electromagnetic valve is communicated with the air supply pipeline of the double-layer pipe section, and the interlayer space of the double-layer electromagnetic valve is communicated with the interlayer pipeline of the double-layer pipe section.

According to the scheme, the interlayer pressure transmitter is arranged in an interlayer pipeline at the upstream of the double-layer pressure reducing root valve; the inner layer pressure transmitter is at least provided with two inner layer pressure transmitters, and the two inner layer pressure transmitters are respectively arranged in an air supply pipeline between the double-layer pressure reducing root valve and the double-layer pressure reducing valve and an air supply pipeline between the double-layer pressure reducing valve and the double-layer electromagnetic valve.

According to the scheme, each valve is connected with the double-layer pipe section through the flange, and the flange is provided with a first through hole for communicating the interlayer space of each valve with the interlayer pipeline and a second through hole for communicating the valve cavity of each valve with the air supply pipeline.

The invention has the beneficial effects that: the double-layer gas supply pipeline system can quickly judge whether gas in the pipeline leaks or not, and has high response speed; the leaked gas cannot be diffused into the closed environment of the submersible vehicle, and the system can still continuously operate even if leakage occurs, so that accidents such as combustion and explosion caused by dangerous gases such as hydrogen, oxygen and the like are avoided, the safe use of the hydrogen-oxygen fuel cell gas supply system is protected, and the reliability is high; the invention is especially suitable for a latent hydrogen-oxygen fuel cell power system and can be used as an important guarantee for the safe operation of the power system.

Drawings

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

Fig. 2 is a cross-sectional view of a double-walled tube segment in this embodiment.

Fig. 3 is a schematic structural diagram of the double-layer check valve in the embodiment.

Fig. 4 is a schematic structural view of the flange in this embodiment.

In the figure: 1. a double-layer pipe section; 2. a double-layer pressure reducing root valve; 3. a double-layer pressure reducing valve; 4. a double-layer electromagnetic valve; 5. a double-layer check valve; 6. a flange; 7. an inner layer pressure transmitter; 8. an interlayer pressure transmitter; 9. an inflation inlet; 10. a control device; 11. an inner tube; 12. an outer tube; 13. a support body; 14. a valve body; 15. an interlayer space; 16. a jacket shell; 17. a valve cavity; 18. a first through hole; 19. a second via.

Detailed Description

For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

The double-layer air supply pipeline system of the potential leakage-proof fuel cell as shown in fig. 1 comprises a double-layer pipe section 1, a double-layer pressure reducing root valve 2, a double-layer pressure reducing valve 3, a double-layer check valve 5 and a control device 10; the double-layer pipe section 1 comprises an inner pipe 11 and an outer pipe 12 which are coaxially arranged, the inner pipe 11 is an air supply pipeline and used for conveying hydrogen or oxygen, and an inner-layer pressure transmitter 7 is installed in the air supply pipeline and used for monitoring pressure change of conveyed gas; an interlayer pipeline is formed between the inner pipe 11 and the outer pipe 12 and is provided with an inflation inlet 9, and the interlayer pipeline is filled with protective gas and is provided with an interlayer pressure transmitter 8 for monitoring the pressure change of the protective gas; the inlet end of the air supply pipeline of the double-layer pipe section 1 is communicated with an air source, and the outlet end of the air supply pipeline is communicated with the air flow channel of the fuel cell; the gas pressure in the interlayer pipeline is lower than the working pressure of the gas in the gas supply pipeline and higher than the external environment pressure.

In the invention, the double-layer pressure reducing root valve 2, the double-layer pressure reducing valve 3 and the double-layer check valve 5 are sequentially arranged on the double-layer pipe section 1 along the flow direction of supplied gas; the double-layer pressure reducing root valve 2, the double-layer pressure reducing valve 3 and the double-layer check valve 5 are all of jacket structures and comprise a valve body 14 and an outer jacket shell 16, a valve cavity 17 (in the prior art, used as an inner flow channel of a general valve body 14) is arranged in the valve body 14, and an interlayer space 15 is formed between the valve body 14 and the outer jacket shell 16; the valve cavity 17 of each valve is respectively communicated with the air supply pipeline of the double-layer pipe section 1, and the interlayer space 15 of each valve is respectively communicated with the interlayer pipeline of the double-layer pipe section 1; the double-layer pressure reducing root valve 2, the double-layer pressure reducing valve 3, the double-layer check valve 5, the inner layer pressure transmitter 7 and the interlayer pressure transmitter 8 are respectively connected with a control device 10; the inner layer pressure transmitter 7 and the interlayer pressure transmitter 8 respectively transmit the monitored pressure signals to the control device 10, and the control device 10 receives pressure information and controls the opening and the closing of each valve according to the pressure lifting condition in the corresponding pipeline.

Preferably, a double-layer electromagnetic valve 4 is additionally arranged on the double-layer pipe section 1 between the double-layer pressure reducing valve 3 and the double-layer check valve 5, and the double-layer electromagnetic valve 4 is electrically connected with the control device 10; the double-layer electromagnetic valve 4 is also of a jacket structure and comprises a valve body 14 and an outer jacket shell 16, a valve cavity 17 is arranged in the valve body 14, and an interlayer space 15 is formed between the valve body 14 and the outer jacket shell 16; the valve cavity 17 of the double-layer electromagnetic valve 4 is communicated with the air supply pipeline of the double-layer pipe section 1, and the interlayer space 15 of the double-layer electromagnetic valve 4 is communicated with the interlayer pipeline of the double-layer pipe section 1. Fig. 3 is a schematic structural diagram of the double-layer check valve 5 in this embodiment.

Preferably, the interlayer pressure transmitter 8 is installed in the interlayer pipeline at the upstream of the double-layer pressure reducing root valve 2; the inner layer pressure transmitters 7 are at least two and are respectively arranged in an air supply pipeline between the double-layer pressure reducing root valve 2 and the double-layer pressure reducing valve 3 and an air supply pipeline between the double-layer pressure reducing valve 3 and the double-layer electromagnetic valve 4.

Preferably, each valve is connected with the double-layer pipe section 1 through a flange 6, and the flange 6 is provided with a first through hole 18 for communicating the interlayer space 15 of each valve with an interlayer pipeline and a second through hole 19 for communicating the valve cavity 17 of each valve with an air supply pipeline. As shown in fig. 4.

Preferably, as shown in fig. 2, the double-layer pipe section 1 further includes a plurality of support bodies 13 circumferentially arranged outside the inner pipe 11 at intervals, and the length direction of the support bodies 13 is consistent with the radial direction of the inner pipe 11; one end of the supporting body 13 is welded and fixed with the outer wall of the inner pipe 11, and the other end of the supporting body 13 is contacted with the inner wall of the outer pipe 12; one end of the support body 13, which is in contact with the outer tube 12, is of a hemispheroid structure, and the support body 13 and the outer tube 12 can slide and are not fixedly connected. The support body 13 is made of a polytetrafluoroethylene material with self-lubricating property, has certain elasticity and certain deformation compression space, and enables the double-layer pipe section 1 to have shock and vibration resistance.

In the invention, the double-layer pipe section 1 comprises an inner pipe 11, an outer pipe 12 and a support body 13, wherein a large interlayer pipeline formed between the inner pipe 11 and the outer pipe 12 is a pressure monitoring pipeline and penetrates through the whole system; the inflation inlet 9 is arranged on the interlayer pipeline to realize the inflation and deflation of interlayer gas and adjust the interlayer gas pressure. Before the air supply pipeline system is used, protective gas is pre-charged into the interlayer pipeline through the inflation inlet 9, and the gas pressure is lower than the working pressure of the air supply pipeline system and higher than the external environment pressure.

In the invention, a double-layer pressure reducing root valve 2 is arranged at an air source outlet at the upstream of a double-layer pipe section 1, and the on-off of the air supply of the whole system is realized by the opening and closing of the double-layer pressure reducing root valve 2; when the inner layer of the air supply pipeline system is found to be leaked, the control device 10 can send the opening and closing control signal of the double-layer decompression root valve 2 to carry out quick closing.

According to the invention, the double-layer pressure reducing valve 3 is arranged at the downstream of the double-layer pressure reducing root valve 2, and the opening degree of the double-layer pressure reducing valve 3 is adjusted according to the comparison between the actual gas pressure of the fuel cell and the preset pressure of the inner-layer pressure transmitter 7, so that the gas demand is met. The double-layer pressure reducing valve 3 may be electrically adjusted by the control device 10 sending a valve opening control signal, or manually adjusted by a person according to the pressure difference of the fuel cell of the gas appliance.

The embodiment can be used for supplying gas for two fuel cells, and the double-layer electromagnetic valve 4, the double-layer check valve 5 and the double-layer pipe section 1 correspond to a gas supply branch. The double-layer electromagnetic valve 4 is arranged at the upstream of the gas supply branch of each fuel cell, and the double-layer electromagnetic valve 4 on the corresponding branch can be closed after any fuel cell is stopped so as to reduce potential leakage points of gas in the gas supply pipeline; or after the gas leakage in the gas supply pipeline is found, all the double-layer electromagnetic valves 4 are closed, and the specific pipeline with the leakage is judged according to the gas source pressure, the pressure of each fuel cell and the pressure of the inner layer pressure transmitter 7. The double-layer check valve 5 is arranged at the outlet of the double-layer electromagnetic valve 4 on the air supply branch of each fuel cell, so that the mutual interference of air supply pressure during the operation of a plurality of fuel cells can be avoided.

In the invention, the double-layer electromagnetic valve 4 is arranged at the outlet of the double-layer pressure reducing valve 3 at the upstream of the double-layer pipe section 1, and the on-off of air supply is realized by opening and closing the double-layer electromagnetic valve 4; when the leakage of the air supply pipeline system is found, the control device 10 can send a valve opening and closing control signal to carry out quick closing.

In the invention, the inner layer pressure transmitter 7 is respectively arranged in the air supply pipeline at the inlet and the outlet of the double-layer pressure reducing valve 3. The inner layer pressure transmitter 7 can monitor the air supply pressure before and after the pressure reduction of the whole system, and send the pressure information to the control device 10. The interlayer pressure transmitter 8 and the inflation inlet 9 are arranged in the interlayer pipeline of the double-layer pipe section 1. The sandwich pressure transmitter 8 may monitor the sandwich gas pressure and send pressure information to the control device 10. The inflation inlet 9 can realize the inflation and deflation of the interlayer gas and adjust the pressure of the interlayer gas. Since the interlayer space 15 of the whole system is through, only one interlayer pressure transmitter 8 and one inflation port 9 are arranged respectively, so as to reduce potential leakage points of the outer pipe 12.

In the invention, the control device 10 controls the opening degree of the double-layer pressure reducing root valve 2, the opening and closing of the double-layer electromagnetic valve 4 and the opening degree of the double-layer pressure reducing valve 3, adjusts the on-off and the air supply pressure of the air supply system, receives interlayer air pressure information from the inner layer pressure transmitter 7 and the interlayer pressure transmitter 8, adjusts the air supply pressure or realizes the quick turn-off of the air supply system according to the pressure rising and falling conditions, and prevents the continuous leakage of air.

The gas pressure in the interlayer pipeline is unchanged under the normal state of the system, if gas leaks from a valve, a flange 6, a welding seam or a joint communicated with the gas supply pipeline of the double-layer pipe section 1, the gas in the gas supply pipeline leaks into the interlayer pipeline, so that the pressure of protective gas in the interlayer pipeline rises, and the purity of hydrogen or oxygen gas in the gas supply pipeline cannot be influenced because the gas leaks from the gas supply pipeline of the inner layer to the interlayer pipeline, so that the system can still continuously run for a period of time if necessary even if the inner layer leaks, and the safety hidden danger cannot be generated when the system does not stop; if gas leaks from the flange 6, the welding seam or the joint communicated with the interlayer pipeline of the double-layer pipe section 1, protective gas of the interlayer pipeline leaks into the external environment, and the gas pressure in the interlayer pipeline is reduced. The control device 10 can judge that the inner pipe 11 or the outer pipe 12 leaks according to the change condition of the interlayer gas pressure, and sends a control signal to quickly close the double-layer electromagnetic root valve.

When inner layer leakage is found and the repair system needs to be checked, the double-layer pressure reducing root valve 2, the double-layer pressure reducing valve 3 and the double-layer electromagnetic valve 4 can be closed under the condition that the air supply pipeline is ventilated, the air supply pressure of an air source, the inner layer pressure transmitter 7 and the fuel cell is compared in a period of time, when the pressure at a certain position is reduced, the corresponding pipe section leaks, and the targeted repair can be carried out.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications can be made to the technical solutions described in the above-mentioned embodiments, or equivalent substitutions of some technical features, but any modifications, equivalents, improvements and the like within the spirit and principle of the present invention shall be included in the protection scope of the present invention.