Fire-resistant and soundproof cover device for hydrogen energy equipment

Abstract

This invention relates to a fire-resistant and sound-insulating cover device for hydrogen energy equipment. It is applicable to the field of hydrogen energy technology. The technical solution adopted by this invention is as follows: The device includes: an outer protective cover, which covers the hydrogen energy equipment; a fire-resistant and sound-absorbing layer, which is disposed inside the outer protective cover; a connecting braking device, which includes a no-fire state and a fire state. In the no-fire state, the connecting braking device allows the fire-resistant and sound-absorbing layer to be tightly attached to the inner wall of the outer protective cover; in the fire state, the connecting braking device allows the fire-resistant and sound-absorbing layer to be attached to the hydrogen energy equipment; a fire monitoring device, which is installed on the outer protective cover and can monitor whether a fire has occurred inside the outer protective cover, and can send a trigger signal to the connecting braking device after detecting a fire; the connecting braking device can switch from the no-fire state to the fire state after receiving the trigger signal sent by the fire monitoring device.

Description

Technical Field

[0001] This invention relates to a fire-retardant and sound-insulating cover device for hydrogen energy equipment. It is applicable to the field of hydrogen energy technology. Background Technology

[0002] As an emerging energy carrier and chemical raw material, hydrogen has a series of advantages such as wide availability, cleanliness, environmental friendliness, and recyclability. It is known as one of the nine new energy sources, along with solar and wind energy, and is hailed as the most promising secondary energy source.

[0003] Hydrogen energy has wide applications in the electronics, automotive, metallurgical, petrochemical, float glass, fine organic synthesis, aerospace, and food processing industries. Hydrogen is colorless and odorless, but it is flammable, explosive, diffusive, and prone to hydrogen embrittlement. If leaked hydrogen mixes with air, it can ignite or explode upon contact with an open flame or static electricity. Therefore, the industry is extremely concerned about hydrogen. The explosive limits of hydrogen are a volume density of 4.0% to 75%, meaning that when the volume concentration of hydrogen in air is between 4.0% and 75%, it will explode upon contact with an ignition source.

[0004] With the increasing application of hydrogen energy, its safety has become a growing concern. Following three major hydrogen explosions within 20 days globally in 2019, the safe utilization of hydrogen as a green and clean energy source, the safe operation of hydrogen energy equipment, and the rapid control of hydrogen combustion have all drawn significant attention to the hydrogen energy industry. Currently, besides monitoring hydrogen concentration in factory areas and linking it to ventilation systems, the industry lacks effective means of flame retardant and fire extinguishing. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a fire-resistant and soundproof cover device for hydrogen energy equipment, in view of the above-mentioned problems.

[0006] The technical solution adopted in this invention is: a fire-resistant and sound-insulating cover device for hydrogen energy equipment, characterized in that it comprises:

[0007] An outer protective cover is provided, which covers the hydrogen energy equipment.

[0008] A fire-resistant and sound-absorbing layer is disposed inside the outer protective cover;

[0009] The connecting braking device includes a fire-free state and a fire state. In the fire-free state, the connecting braking device can make the fire-resistant and sound-absorbing layer tightly adhere to the inner wall of the outer protective cover. In the fire state, the connecting braking device can make the fire-resistant and sound-absorbing layer adhere to the hydrogen energy equipment.

[0010] A fire monitoring device is installed on the outer protective cover, which can monitor whether a fire occurs inside the outer protective cover, and can send a trigger signal to the connecting braking device after a fire is detected.

[0011] The linkage braking device can switch from a no-fire state to a fire state after receiving a trigger signal sent by the fire monitoring device.

[0012] The fire-retardant and sound-absorbing layer is a multi-layer composite structure with multiple channel layers. Each channel layer is covered with several micro-channels. The flow surface of the micro-channels is locally narrowed. The Laval nozzle principle is used to accelerate the airflow conduction and diffusion. The positions of the micro-channels on two adjacent channel layers are staggered.

[0013] Each layer of the multi-layered composite structure is filled with microchannels and reinforced heat pipes for effective heat conduction and dissipation, preventing heat accumulation and flame spread. The flow surface of the microchannels is locally narrowed, employing the Laval nozzle principle to accelerate airflow conduction and diffusion. Furthermore, the microchannels on adjacent channel layers are staggered, allowing the airflow ejected from the microchannels of the upper channel layer to enter at least two microchannels in the lower channel layer, further segmenting the airflow and isolating energy transfer between hydrogen free radical molecules.

[0014] The channel layer is made of a flexible, thermally conductive, flame-retardant porous polymer material. These materials include polyvinyl chloride (PVC) containing antimony trioxide, hydrated alumina, zinc borate, and magnesium hydroxide compounds, as well as fluorine-containing composite materials.

[0015] The microchannels on the channel layer are hexagonal pores.

[0016] The flame-retardant and sound-absorbing layer has a thermosensitive layer on the side furthest from the hydrogen energy device. This thermosensitive layer changes color upon sensing heat from the inside of the flame-retardant and sound-absorbing layer. Materials for the thermosensitive layer include intelligent temperature-sensitive color-changing graphene and thiophene series thermosensitive dyes.

[0017] The connecting braking device includes a locking mechanism and a fixing mechanism;

[0018] The locking mechanism is installed at the edge of the fire-resistant and sound-absorbing layer and at the corner of the outer protective cover. In the absence of a fire, the locking mechanism can make the edge of the fire-resistant and sound-absorbing layer fit tightly against the inner wall of the outer protective cover. In the event of a fire, the locking mechanism can make the edge of the fire-resistant and sound-absorbing layer press tightly against the civil engineering foundation surface.

[0019] The fixing mechanism is fixed to the inner wall of the outer protective cover. In the absence of a fire, the fixing mechanism can connect the fire-resistant and sound-absorbing layer and make the fire-resistant and sound-absorbing layer adhere tightly to the inner wall of the outer protective cover. In the event of a fire, the fixing mechanism releases the fire-resistant and sound-absorbing layer and makes the fire-resistant and sound-absorbing layer adhere to the hydrogen energy equipment.

[0020] The locking mechanism includes a locking ring and a trigger. The locking ring is fixed to the edge of the fire-resistant and sound-absorbing layer. The lower end of the locking ring is fixed to the corner of the outer protective cover via the trigger. The trigger can make the locking ring fit tightly against the inner wall of the outer protective cover in the absence of a fire, and can press the locking ring against the civil engineering foundation surface in the event of a fire.

[0021] The fixing mechanism includes a fixer and a cable fixing mechanism;

[0022] The fixing device is fixed to the outer protective cover and can connect and release the fire-resistant and sound-absorbing layer; the cable fixing mechanism includes a trigger cable device and a catapult cable. The trigger cable device is fixed to the inner wall of the outer protective cover, and one end of the catapult cable is connected to the trigger cable device and the other end is connected to the fire-resistant and sound-absorbing layer.

[0023] The outer protective cover has a flame-retardant and explosion-proof facade wall forming a circle, and a lightweight roof installed above the flame-retardant and explosion-proof facade wall. The roof panel is made of a lightweight thin plate that can break rapidly beyond the set pressure. When combustion occurs inside the outer protective cover and causes a deflagration, the lightweight roof can break upwards and eject to release the explosion.

[0024] The airflow generated by the deflagration is trapped within the four flame-retardant and explosion-proof walls, causing the airflow to rise and impact the lightweight roof. The roof adopts a pressure-relief type lightweight steel structure, which can be quickly ejected and broken after being impacted by the airflow to release the airflow.

[0025] The outer protective cover is equipped with a forced ventilation system and a sprinkler system. The forced ventilation system can forcefully expel hydrogen-containing air from inside the outer protective cover, and the sprinkler system can spray CO2 fire extinguishing gas.

[0026] The beneficial effects of this invention are: in the absence of a fire, the fire-resistant and sound-absorbing layer is tightly attached to the inner wall of the outer protective cover by the connecting braking device, and in the event of a fire, the fire-resistant and sound-absorbing layer is attached to the hydrogen energy equipment. The fire-resistant and sound-absorbing layer tightly attached to the inner wall of the outer protective cover achieves sound insulation and noise reduction, while the fire-resistant and sound-absorbing layer attached to the hydrogen energy equipment achieves cooling and flame retardancy.

[0027] This invention utilizes the channel layer and enhanced heat pipe layer in the flame-retardant and sound-absorbing layer to rapidly reduce the temperature at the ignition point and reduce the energy transfer between hydrogen free radical molecules during combustion to achieve flame retardancy.

[0028] This invention utilizes a temperature-sensitive layer in the flame-retardant and sound-absorbing layer, which quickly changes color after sensing the heat transmitted through the inner pores, forming a marked area to facilitate the location of hydrogen equipment leaks.

[0029] This invention uses a catapult cable and spring to quickly attach the fire-retardant and sound-absorbing layer to the hydrogen energy equipment, thereby achieving the function of isolating oxygen and preventing deflagration after hydrogen ignites. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of an embodiment (in the absence of a fire).

[0031] Figure 2 This is a structural schematic diagram of an embodiment (in a fire condition).

[0032] Figure 3 This is a schematic diagram of the locking mechanism in the embodiment (in the absence of a fire).

[0033] Figure 4 This is a schematic diagram of the locking mechanism in the embodiment (in a fire condition).

[0034] Figure 5 This is a schematic diagram of a partial structure of the fire-resistant and sound-absorbing layer in an embodiment.

[0035] 1. Outer protective cover; 2. Connecting braking device; 201. Trigger cable device; 202. Ejector cable; 203. Spring; 204. Fixing device; 205. Locking ring; 206. Locking ring trigger; 3. Flame-retardant and sound-absorbing polymer layer; 301. Microchannel; 302. Enhanced heat pipe; 4. Forced ventilation system; 5. Fire monitoring device; 6. Sprinkler system; 601. Liquid CO2 fire extinguisher; 602. Fire extinguisher nozzle. Detailed Implementation

[0036] This embodiment is a fire-resistant and soundproof cover device for hydrogen energy equipment, including: an outer protective cover, a fire-resistant and sound-absorbing layer, a connecting braking device, a fire monitoring device, a forced ventilation system, and a sprinkler system, etc.

[0037] In this example, the outer protective cover encloses the hydrogen energy equipment and consists of a flame-retardant and explosion-proof facade wall forming a ring on all four sides, as well as a lightweight roof installed above the flame-retardant and explosion-proof facade wall. When combustion occurs inside the outer protective cover, causing an uncontrollable deflagration, the lightweight roof can instantly break upwards and eject to release the explosion, allowing surrounding air to quickly enter the cover, diluting the hydrogen concentration and mitigating the hazards caused by the hydrogen deflagration.

[0038] In this embodiment, the flame-retardant and sound-absorbing layer is disposed inside the outer protective cover. This flame-retardant and sound-absorbing layer can be attached to the hydrogen energy equipment to achieve flame retardancy. The flame-retardant and sound-absorbing layer is a multi-layer composite structure, including multiple channel layers, at least one reinforced heat pipe layer, and a temperature-sensitive layer.

[0039] In this example, the channel layer is made of a flexible polymer thermally conductive and flame-retardant porous material. The channel layer is covered with microchannels connecting the two sides of the channel layer. The microchannels are hexagonal pores, and the microchannels on the two adjacent channel layers are staggered.

[0040] When the flame-retardant and sound-absorbing layer is attached to hydrogen energy equipment, the burning hydrogen gas passes through the flexible polymer thermally conductive and flame-retardant porous material, which divides it into multiple fine airflows to reduce combustion energy. This isolates the energy transfer between free radical molecules of burning hydrogen, lowering the ignition temperature of hydrogen and achieving flame retardancy. Furthermore, the layered design of the flexible polymer thermally conductive and flame-retardant material, with staggered spacing between channels, further diverts the free radical molecules of burning hydrogen, strengthening the isolation of intermolecular energy transfer.

[0041] In this embodiment, the enhanced heat pipe layer has a large number of enhanced heat pipes, which effectively conduct and dissipate heat to prevent the spread of flames caused by heat accumulation.

[0042] In this example, the temperature-sensitive layer is the outermost layer of the flame-arresting and sound-absorbing layer (located away from the hydrogen energy equipment). This temperature-sensitive layer is made of temperature-sensitive material and can quickly change color after sensing the heat transmitted by the inner channel layer of the flame-arresting and sound-absorbing layer, forming a marked area to facilitate the location of the hydrogen energy equipment leak.

[0043] In this embodiment, the fire monitoring device is installed on the outer protective cover, which can monitor whether a fire occurs inside the outer protective cover, and can send a trigger signal to the connecting braking device and the spray system after a fire is detected.

[0044] In this example, the fire-retardant and sound-absorbing layer is installed inside the outer protective cover via a connecting and braking device. This connecting and braking device has two working states: no-fire state and fire state. It can switch from the no-fire state to the fire state after receiving a trigger signal sent by the fire monitoring device. In the no-fire state, the connecting and braking device can make the fire-retardant and sound-absorbing layer fit tightly against the inner wall of the outer protective cover. The flexible polymer thermally conductive and flame-retardant porous material absorbs the noise waves transmitted in space, achieving a sound insulation and noise reduction effect. In the fire state, the connecting and braking device can make the fire-retardant and sound-absorbing layer adhere to the hydrogen energy equipment, achieving thermal conductivity and flame retardancy.

[0045] In this embodiment, the connecting braking device includes a locking mechanism and a fixing mechanism. The locking mechanism is installed on the edge of the fire-resistant and sound-absorbing layer and at the corner of the outer protective cover. In the absence of a fire, the locking mechanism ensures that the edge of the fire-resistant and sound-absorbing layer is tightly attached to the inner wall of the outer protective cover. In the event of a fire, the locking mechanism presses the edge of the fire-resistant and sound-absorbing layer against the foundation surface, preventing the combustion hydrogen gas from escaping and dissipating from the bottom of the fire-resistant and sound-absorbing layer. The fixing mechanism is fixed to the inner wall of the outer protective cover. In the absence of a fire, the fixing mechanism connects the fire-resistant and sound-absorbing layer and ensures that the fire-resistant and sound-absorbing layer is tightly attached to the inner wall of the outer protective cover. In the event of a fire, the fixing mechanism releases the fire-resistant and sound-absorbing layer and attaches it to the hydrogen energy equipment.

[0046] In this example, the locking mechanism includes a locking ring and a trigger. The locking ring is fixed to the edge of the fire-resistant and sound-absorbing layer, and the lower end of the locking ring is fixed to the corner of the outer protective cover via the trigger. The trigger can make the locking ring fit tightly against the inner wall of the outer protective cover in the absence of a fire, and can press the locking ring against the civil engineering foundation surface in the event of a fire.

[0047] This embodiment's macro-fixing mechanism includes a fixture and a cable fixing mechanism. The fixture is fixed to the outer protective cover and can connect and release the fire-resistant and sound-absorbing layer. The cable fixing mechanism includes a trigger cable device and a launch cable. The trigger cable device is fixed to the inner wall of the outer protective cover. One end of the launch cable is connected to the trigger cable device, and the other end is connected to the fire-resistant and sound-absorbing layer. The trigger cable device can tighten the launch cable to make the fire-resistant and sound-absorbing layer adhere tightly to the inner wall of the outer protective cover. The trigger cable device can also release the launch cable to make the fire-resistant and sound-absorbing layer adhere to the hydrogen energy equipment. The trigger cable device can also tighten the launch cable after releasing it, thereby facilitating the re-adhere of the fire-resistant and sound-absorbing layer to the inner wall of the outer protective cover.

[0048] In this embodiment, a forced ventilation system and a sprinkler system are installed on the outer protective cover. The forced ventilation system can adjust the number of forced air exchanges according to process requirements and the hydrogen concentration inside the outer protective cover to ensure that the hydrogen volume fraction in the air inside the outer protective cover is far below the lower explosive limit of hydrogen. The sprinkler system has a liquid CO2 fire extinguisher placed outside the outer protective cover. The liquid CO2 fire extinguisher is connected to the inside of the outer protective cover through the fire extinguisher nozzle. After receiving a trigger signal, liquid carbon dioxide is rapidly sprayed out to form dry ice, which cools the heat transferred from the fire-resistant and sound-absorbing layer and isolates and dilutes the oxygen inside the cover, thereby terminating the combustion.

[0049] In this embodiment, multiple sets of monitoring instruments are installed at the bottom of the outer protective cover structure beam. The monitoring instruments are connected to the gas supply pipeline of the hydrogen energy equipment. When the monitoring instruments detect hydrogen leakage and combustion, they trigger the linkage braking device to release the flame arrestor and soundproofing layer, and at the same time quickly close the gas supply pipeline valve to isolate the hydrogen energy supply.

[0050] The above embodiments are only used to explain the inventive concept of the present invention, and are not intended to limit the protection of the present invention. Any non-substantial modifications made to the present invention using this concept should fall within the protection scope of the present invention.

Claims

1. A fire-retardant and sound-insulating cover device for hydrogen energy equipment, characterized in that, include: An outer protective cover is provided, which covers the hydrogen energy equipment. A fire-resistant and sound-absorbing layer is disposed inside the outer protective cover; The connecting braking device includes a fire-free state and a fire state. In the fire-free state, the connecting braking device can make the fire-resistant and sound-absorbing layer tightly adhere to the inner wall of the outer protective cover. In the fire state, the connecting braking device can make the fire-resistant and sound-absorbing layer adhere to the hydrogen energy equipment. A fire monitoring device is installed on the outer protective cover, which can monitor whether a fire occurs inside the outer protective cover, and can send a trigger signal to the connecting braking device after a fire is detected. The connecting braking device can switch from a no-fire state to a fire state after receiving a trigger signal sent by the fire monitoring device; the fire-resistant and sound-absorbing layer is a multi-layer composite structure with multiple channel layers. Each channel layer is filled with several micro-channels. The flow surface of the micro-channels is locally narrowed. The Laval nozzle principle is used to accelerate the airflow conduction and diffusion. The positions of the micro-channels on the two adjacent channel layers are staggered. The channel layer is made of a flexible polymer thermally conductive and flame-retardant porous material. The outer protective cover has a flame-retardant and explosion-proof facade wall forming a circle, and a lightweight roof installed above the flame-retardant and explosion-proof facade wall. The roof panel is made of a lightweight thin plate that can break rapidly beyond the set pressure. When combustion occurs inside the outer protective cover and causes a deflagration, the lightweight roof can break upwards and eject to release the explosion.

2. The fire-retardant and sound-insulating cover device for hydrogen energy equipment according to claim 1, characterized in that: The microchannels on the channel layer are hexagonal pores.

3. The fire-resistant and sound-insulating cover device for hydrogen energy equipment according to claim 1 or 2, characterized in that: The fire-resistant and sound-absorbing layer has a thermosensitive layer on the side away from the hydrogen energy equipment. This thermosensitive layer changes color after sensing heat inside the fire-resistant and sound-absorbing layer.

4. The fire-retardant and sound-insulating cover device for hydrogen energy equipment according to claim 1, characterized in that: The connecting braking device includes a locking mechanism and a fixing mechanism; The locking mechanism is installed at the edge of the fire-resistant and sound-absorbing layer and at the corner of the outer protective cover. In the absence of a fire, the locking mechanism can make the edge of the fire-resistant and sound-absorbing layer fit tightly against the inner wall of the outer protective cover. In the event of a fire, the locking mechanism can make the edge of the fire-resistant and sound-absorbing layer press tightly against the civil engineering foundation surface. The fixing mechanism is fixed to the inner wall of the outer protective cover. In the absence of a fire, the fixing mechanism can connect the fire-resistant and sound-absorbing layer and make the fire-resistant and sound-absorbing layer adhere tightly to the inner wall of the outer protective cover. In the event of a fire, the fixing mechanism releases the fire-resistant and sound-absorbing layer and makes the fire-resistant and sound-absorbing layer adhere to the hydrogen energy equipment.

5. The fire-retardant and sound-insulating cover device for hydrogen energy equipment according to claim 4, characterized in that: The locking mechanism includes a locking ring and a trigger. The locking ring is fixed to the edge of the fire-resistant and sound-absorbing layer. The lower end of the locking ring is fixed to the corner of the outer protective cover via the trigger. The trigger can make the locking ring fit tightly against the inner wall of the outer protective cover in the absence of a fire, and can press the locking ring against the civil engineering foundation surface in the event of a fire.

6. The fire-retardant and sound-insulating cover device for hydrogen energy equipment according to claim 4, characterized in that: The fixing mechanism includes a fixer and a cable fixing mechanism; The fixing device is fixed to the outer protective cover and can connect and release the fire-resistant and sound-absorbing layer; the cable fixing mechanism includes a trigger cable device and a catapult cable. The trigger cable device is fixed to the inner wall of the outer protective cover, and one end of the catapult cable is connected to the trigger cable device and the other end is connected to the fire-resistant and sound-absorbing layer.

7. The fire-resistant and sound-insulating cover device for hydrogen energy equipment according to claim 1, characterized in that: The outer protective cover is equipped with a forced ventilation system and a sprinkler system. The forced ventilation system can forcefully expel hydrogen-containing air from inside the outer protective cover, and the sprinkler system can spray CO2 fire extinguishing gas.

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