CN213692126U

CN213692126U - Hydrogen evacuation and replacement device for fuel cell automobile

Info

Publication number: CN213692126U
Application number: CN202023195055.2U
Authority: CN
Inventors: 张磊; 王大威; 蒋增友; 于曙光
Original assignee: Weishi Energy Technology Co Ltd
Current assignee: Weishi Energy Technology Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-07-13
Anticipated expiration: 2030-12-28

Abstract

The utility model discloses a hydrogen evacuation and replacement device for a fuel cell vehicle, which relates to the technical field of fuel cell vehicle maintenance devices and comprises an exhaust mechanism and a movable mechanism; the exhaust mechanism is arranged at the top of the movable mechanism; one end of the exhaust mechanism is communicated with the hydrogen tank, and the other end of the exhaust mechanism is communicated with the atmosphere. The exhaust mechanism can control the exhaust process, can immediately stop the exhaust work and the nitrogen replacement operation if an accident occurs, ensures the safety of vehicles and personnel, and the hydrogen in the hydrogen tank is replaced by nitrogen, so that the exhaust process is less affected by environmental factors.

Description

Hydrogen evacuation and replacement device for fuel cell automobile

Technical Field

The utility model relates to a fuel cell car maintenance technical field especially relates to a fuel cell car hydrogen evacuation replacement device.

Background

With the development of fuel cell vehicles, which are commercially available, the operation steps of conventional vehicles cannot be adopted when the fuel cell vehicles are out of order and need to be repaired and maintained daily. Because of the hazardous nature of hydrogen: 1. explosion can be caused when the explosion limit (4% -75%) is exceeded after hydrogen leakage; 2. the excessive hydrogen inhaled by the human body can cause asphyxia; 3. the pressure in the hydrogen storage bottle is high (35-70Mpa), and huge energy can be released when accidental pressure relief occurs, so that accidents are caused.

The existing fuel cell automobile hydrogen evacuation mode adopts a temporary evacuation pipeline for connection, the evacuation operation is carried out at an open ventilation position outdoors, personnel operate and deflate below a vehicle chassis, and the nitrogen filling machine is connected for nitrogen replacement after the evacuation is finished. The traditional exhaust process has no protective measures aiming at vehicles and personnel, has high danger and great influence by environmental factors, is not controlled in the exhaust process, and cannot immediately stop the exhaust operation and the nitrogen replacement operation if an accident occurs.

In summary, before the fuel cell vehicle is repaired and maintained, the hydrogen in the hydrogen storage cylinder and the hydrogen pipeline of the vehicle needs to be evacuated and replaced, so as to ensure the safety of personnel and vehicles. There is therefore a need for a convenient, safe, reliable, and removable hydrogen evacuation and replacement device.

Disclosure of Invention

For solving above technical problem, the utility model provides a fuel cell car hydrogen evacuation replacement device can control exhaust process, ensures personnel's safety.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides a hydrogen evacuation and replacement device for a fuel cell vehicle, which comprises an exhaust mechanism and a movable mechanism; the exhaust mechanism is arranged at the top of the movable mechanism; one end of the exhaust mechanism is communicated with the hydrogen tank, and the other end of the exhaust mechanism is communicated with the atmosphere.

Optionally, the exhaust mechanism includes a first pneumatic valve switch, a pressure transmitter, a second pneumatic valve switch and a three-way valve; the gas outlet end of the first pneumatic valve switch is communicated with the atmosphere, the gas inlet end of the first pneumatic valve switch is communicated with the first interface of the three-way valve, the gas outlet end of the second pneumatic valve switch is communicated with the second interface of the three-way valve, and the third interface of the three-way valve is communicated with the hydrogen tank; the pressure transmitter is arranged between the first pneumatic valve switch and the three-way valve.

Optionally, the air outlet end of the first pneumatic valve switch is communicated with the atmosphere through a detachable external discharge pipeline.

Optionally, the detachable outer discharge pipeline includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline which are sequentially communicated.

Optionally, an air inlet end of the second pneumatic valve switch is communicated with a nitrogen source.

Optionally, the exhaust device further comprises a grounding wire, and one end of the grounding wire is electrically connected with the exhaust mechanism.

Optionally, the movable mechanism includes a frame and wheels, the wheels are disposed at the bottom of the frame, and the exhaust mechanism is disposed at the top of the frame.

The utility model discloses for prior art gain following technological effect:

the utility model provides a fuel cell car hydrogen evacuation replacement device, exhaust mechanism can control the exhaust process, can stop exhaust operation and nitrogen gas replacement operation immediately if meet accident, ensure vehicle and personnel safety to, hydrogen in the hydrogen tank is replaced by nitrogen gas, therefore the exhaust process receives environmental factor to influence for a short time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments 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 these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a hydrogen evacuation and replacement device for a fuel cell vehicle according to the present invention;

FIG. 2 is a schematic structural view of a detachable external discharge pipeline in the hydrogen evacuation replacement device for a fuel cell vehicle of the present invention;

fig. 3 is a schematic structural diagram of an exhaust mechanism in the hydrogen evacuation and replacement device of the fuel cell vehicle of the present invention;

fig. 4 is a schematic structural diagram of the movable mechanism in the hydrogen evacuation and replacement device of the fuel cell vehicle of the present invention.

Description of reference numerals: 1. the external discharge pipeline can be disassembled; 2. an exhaust mechanism; 3. a vehicle-end conduit; 4. the nitrogen is connected with a pipeline; 5. a first pipeline; 6. a second pipeline; 7. a third pipeline; 8. a fourth pipeline; 9. a first pneumatic valve switch; 10. a pressure transmitter; 11. a second pneumatic valve switch; 12. and a three-way valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 4, the present embodiment provides a hydrogen evacuation replacement device for a fuel cell vehicle, including an exhaust mechanism 2 and a movable mechanism; the exhaust mechanism 2 is arranged on the top of the movable mechanism; one end of the exhaust mechanism 2 is communicated with the hydrogen tank, and the other end of the exhaust mechanism 2 is communicated with the atmosphere.

In this embodiment, the exhaust mechanism 2 includes a first pneumatic valve switch 9, a pressure transmitter 10, a second pneumatic valve switch 11 and a three-way valve 12; the air outlet end of the first pneumatic valve switch 9 is communicated with the atmosphere, the air inlet end of the first pneumatic valve switch 9 is communicated with the first interface of the three-way valve 12, the air outlet end of the second pneumatic valve switch 11 is communicated with the second interface of the three-way valve 12, and the third interface of the three-way valve 12 is communicated with the hydrogen tank; the pressure transmitter 10 is arranged between the first pneumatic valve switch 9 and the three-way valve 12.

And the air outlet end of the first pneumatic valve switch 9 is communicated with the atmosphere through a detachable outer discharge pipeline 1. The detachable outer discharge pipeline 1 comprises a first pipeline 5, a second pipeline 6, a third pipeline 7 and a fourth pipeline 8 which are sequentially communicated. The lengths of the first, second, third and fourth pipelines 5, 6, 7 and 8 depend on the actual required length, and the total length of the pipelines is required to enable the discharged hydrogen to be used by vehicles and operators; all pipelines are connected through joints.

And the air inlet end of the second pneumatic valve switch 11 is communicated with a nitrogen source. The nitrogen source may be a nitrogen tank.

In a more specific embodiment, the hydrogen evacuation replacement device for a fuel cell vehicle further comprises a ground wire, and one end of the ground wire is electrically connected with the exhaust mechanism 2.

The movable mechanism comprises a frame and wheels, the wheels are arranged at the bottom of the frame, and the exhaust mechanism 2 is arranged at the top of the frame.

The hydrogen evacuation was performed as follows:

s1: moving the hydrogen evacuation displacement device of the fuel cell vehicle to a proper position around the vehicle, and confirming that the first pneumatic valve switch 9 and the second pneumatic valve switch 11 are both in a closed state:

s2: outer row pipeline 1 can be dismantled in the installation to ensure that the pipeline is fixed firm and steady:

s3: the air source connected with the first pneumatic valve switch 9 and the second pneumatic valve switch 11 is connected with the nitrogen cylinder, the ground wire, the wiring harness of the pressure transmitter 10 and the detachable external discharge pipeline 1;

s4: closing a hand valve of a hydrogen tank of the vehicle, connecting a third interface of the three-way valve 12 with an emptying interface of the hydrogen tank, and opening the hand valve of the hydrogen tank to enable personnel to leave the range of the vehicle;

s5: the personnel are at a distance of 20 meters from the vehicle or have a firm wall body as a shield, the electromagnetic valve of the hydrogen tank is controlled to be opened through a computer, and whether the pressure value is normal or not is checked through the pressure transmitter 10:

s6: opening 1/3 degree of the first pneumatic valve switch 9 to confirm whether the hydrogen flow rate is normal, if no, fully opening the first pneumatic valve switch 9 until the hydrogen is exhausted;

s7: closing the first pneumatic valve switch 9, opening the second pneumatic valve switch 11 for nitrogen replacement, closing the second pneumatic valve switch 11 after nitrogen enters the vehicle pipeline for 30s, and opening the first pneumatic valve switch 9 to discharge the mixed gas of hydrogen and nitrogen;

s8: the operation in S7 was repeated 5 times until the gas in the hydrogen tank was completely replaced with nitrogen:

s9: standing for 10min to completely empty the hydrogen in the pipeline, disassembling the grounding wire, the pressure transmitter 10 wire harness, the detachable outer discharge pipeline 1 and the vehicle end pipeline 3, and completing the hydrogen emptying operation.

It should be noted that, as is obvious to a person skilled in the art, the invention is not limited to details of the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. A fuel cell car hydrogen evacuation displacement device, characterized by that, including exhaust mechanism and movable mechanism; the exhaust mechanism is arranged at the top of the movable mechanism; one end of the exhaust mechanism is communicated with the hydrogen tank, and the other end of the exhaust mechanism is communicated with the atmosphere.

2. The fuel cell vehicle hydrogen evacuation displacement device of claim 1, wherein the exhaust mechanism comprises a first pneumatic valve switch, a pressure transmitter, a second pneumatic valve switch, and a three-way valve; the gas outlet end of the first pneumatic valve switch is communicated with the atmosphere, the gas inlet end of the first pneumatic valve switch is communicated with the first interface of the three-way valve, the gas outlet end of the second pneumatic valve switch is communicated with the second interface of the three-way valve, and the third interface of the three-way valve is communicated with the hydrogen tank; the pressure transmitter is arranged between the first pneumatic valve switch and the three-way valve.

3. The fuel cell vehicle hydrogen evacuation displacement device of claim 2, wherein the outlet port of the first pneumatic valve switch is in communication with the atmosphere via a removable exhaust line.

4. The fuel cell vehicle hydrogen evacuation and replacement device of claim 3, wherein the detachable outer discharge pipeline comprises a first pipeline, a second pipeline, a third pipeline and a fourth pipeline which are sequentially communicated.

5. The fuel cell vehicle hydrogen evacuation displacement device of claim 2, wherein the inlet end of the second pneumatic valve switch is in communication with a nitrogen source.

6. The fuel cell vehicle hydrogen evacuation displacement device of claim 1, further comprising a ground line, one end of which is electrically connected to the exhaust mechanism.

7. The fuel cell vehicle hydrogen evacuation displacement apparatus of claim 1, wherein the movable mechanism includes a frame and wheels, the wheels are disposed on the bottom of the frame, and the exhaust mechanism is disposed on the top of the frame.