Condensed aerosol fire extinguishing device capable of spraying for multiple times in sections

Abstract

The utility model relates to a hot aerosol fire extinguishing device capable of spraying for multiple times in sections, which is provided with a main body, at least two cavities are arranged in the main body, aerosol generating agents are placed in the cavities, spraying orifices are arranged on the walls of the cavities, one end of a thermosensitive wire is exposed, the other end of the thermosensitive wire extends into the aerosol generating agents in one of the cavities, and the cavities are separated by a heat insulation flame-retardant material. A bent hole channel is formed in the heat insulation flame-retardant material, an ignition line is arranged in the hole channel, the two ends of the ignition line extend into the aerosol generating agents of the adjacent cavities respectively, and the multiple cavities are sequentially connected through the ignition line and triggered one by one.

Description

Technical Field

[0001] The utility model belongs to the field of aerosol fire extinguishing equipment and relates to a hot aerosol fire extinguishing device. Background Technique

[0002] Aerosol fire extinguishing agents can be divided into hot aerosols and cold aerosols according to different production methods. The hot aerosol fire extinguishing agent is a solid mixture composed of substances such as oxidants, reducers, binders, and combustion rate regulators. Under the initiation of current or heat, through the oxidation-reduction combustion reaction of the agent itself, an aerosol for fire extinguishing is generated, and the fire is extinguished by reducing combustion free radicals and destroying the combustion reaction chain. The cold aerosol fire extinguishing agent is a fire extinguishing solvent formed by dispersing solid or liquid ultra-fine fire extinguishing particles in a gas by mechanical or high-pressure gas. The aerosol fire extinguishing devices applied in domestic projects all belong to the thermal type. The hot aerosol belongs to a total flooding system and gradually extinguishes the fire in a total flooding manner under the condition of controlling the fire source. The third-generation S-type hot aerosol mainly uses strontium salt as the main oxidant. Strontium ions do not absorb moisture, will not form a conductive solution, and will not cause damage to electrical equipment.

[0003] The hot aerosol fire extinguishing agent is not directly stored in the fire extinguishing device like other fire extinguishing agents, but exists in the chemical reaction chamber of the hot aerosol fire extinguishing device in the form of an aerosol generator. By giving it the minimum energy required for ignition by an initiator, a chemical reaction occurs to generate an aerosol, which is then ejected after being cooled by a coolant. Its particle size is usually less than 0.1 micron. Its particles are small and have high surface activity, and can efficiently destroy the free radicals in the flame, thus achieving the effect of chemical inhibition and fire extinguishing. The aerosol formed by dispersing solid particles in a gas can remain stable for a long time without sedimentation, and can bypass obstacles and spread to every corner in a total flooding manner to achieve the purpose of efficient fire extinguishing. Stored in a solid state and not volatile itself, there will be no problems such as leakage, and it has a long storage life. It is suitable for relatively enclosed spaces such as high (low) voltage distribution rooms, generator rooms, archives, computer rooms, cable mezzanines, cable wells, cable trenches, and switch cabinets.

[0004] At present, high (low) voltage distribution rooms, battery compartments of new energy batteries, switch cabinets and other places are generally operated unattended for a long time. When electrical failures, equipment aging, battery thermal runaway and other conditions occur, it is easy to cause fires and cause immeasurable losses. Automatic fire extinguishing devices are often available, and hot aerosol fire extinguishing devices are one of them. When a fire occurs, the hot aerosol fire extinguishing device is activated. Due to the large gas production of traditional hot aerosol fire extinguishing devices, the hot aerosol fire extinguishing agent will quickly fill the entire space. In this process, the large amount of gas sprayed often causes excessive positive pressure in the space, causing the flammable gas to be pressed into the combustibles such as batteries and cannot be completely discharged. When the hot aerosol fire extinguishing device is finished spraying, the pressure in the space drops, and the flammable gas escapes from the inside of the combustibles again, and there is a risk of re-ignition. In addition, the temperature of the nozzle is high when the hot aerosol is sprayed. If there are obstructions near the nozzle of the fire extinguishing device, such as the nozzle facing a cabinet, a certain equipment casing, components, etc., the obstruction will be burned to produce a black aggregate with a higher temperature. After cooling, it will adhere to the obstruction in the form of solid blocks, causing damage to the obstruction.

[0005] Therefore, it is necessary to improve the traditional aerosol fire extinguishing device and design a fire extinguishing device that can spray multiple times and has a shield at the spray port to solve the above problems. Utility Model Content

[0006] The utility model provides a hot aerosol fire extinguishing device which can spray in sections and multiple times.

[0007] The following technical scheme is adopted: a hot aerosol fire extinguishing device with multiple segmented spraying is provided with a main body, at least two chambers are provided in the main body, aerosol generator is placed in the chamber, and a spray port is provided on the cavity wall, one end of a thermal sensitive wire is exposed and the other end is extended into the aerosol generator of one of the chambers, the chambers are separated from each other by a heat-insulating flame-retardant material, a curved channel is provided in the heat-insulating flame-retardant material, an ignition wire is provided in the channel, both ends of the ignition wire are respectively extended into the aerosol generator of the adjacent chamber, a plurality of chambers are provided, which are connected in sequence by the ignition wire, and when the set temperature is reached, the chamber connected to the thermal sensitive wire burns and sprays the aerosol first, the ignition wire is ignited until the aerosol generator of the chamber adjacent to the chamber connected to the thermal sensitive wire is triggered, and the following chambers are triggered one by one.

[0008] The main body is a disc, which is provided with three chambers, the first chamber, the second chamber, and the third chamber, which are separated by a partition with an intersection angle of 120 degrees. The ignition wire passes through a curved channel set in the partition. The injection port is set on the side wall of the chamber. A baffle is provided around the injection port. The baffle has an arc and an L-shaped cross-section and is fixed to the outer wall of the disc.

[0009] The main body is a square column, which is provided with three chambers, namely the first chamber, the second chamber, and the third chamber. They are separated by a flat partition plate. The ignition wire passes through the curved channel provided on the flat partition plate. The ejection port is arranged on the side wall of the chamber, and a baffle is provided around the ejection port. The cross-section of the baffle is L-shaped and is fixed to the outer wall of the square column.

[0010] Furthermore, the main body is connected with a fixing structure for fixing the device on the wall plate at the installation location.

[0011] The beneficial effects of the present utility model are as follows: The multi-chamber structure triggers the ejection at intervals to ensure the complete release of combustible gas, ensuring complete fire extinguishing and no re-ignition. There is a baffle, so that the high-temperature aerosol is first ejected onto the baffle, and the baffle bears the high-temperature impact, preventing the cabinet body or electrical components around the nozzle in a narrow space from being burned or damaged; reducing the impact force of the high-temperature aerosol to prevent burns when a person is exactly facing the nozzle. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the internal structure of an embodiment of the disc-shaped main body of the present utility model;

[0013] Figure 2 It is an external view of an embodiment of the disc-shaped main body of the present utility model;

[0014] Figure 3 It is a schematic diagram of the internal structure of an embodiment of the square-column-shaped main body of the present utility model;

[0015] Figure 4 It is an external view of an embodiment of the square-column-shaped main body of the present utility model;

[0016] Figure 5 It is a schematic diagram of the U-shaped mounting piece of the present utility model. Detailed Embodiments

[0017] A heat-generating aerosol fire extinguishing device with segmented and multiple-stage spraying is provided with a main body. There are at least two chambers in the main body. An aerosol generating agent is placed in the chamber, and an ejection port is arranged on the chamber wall. One end of a heat-sensitive wire is exposed, and the other end extends into the aerosol generating agent in one of the chambers. The chambers are separated by a heat-insulating and flame-retardant material. A curved channel is provided in the heat-insulating and flame-retardant material, and an ignition wire is arranged in the channel. Both ends of the ignition wire extend into the aerosol generating agent in adjacent chambers respectively. Multiple chambers are provided and are connected in sequence through the ignition wire. The heat-sensitive wire can detect the temperature change at any point within its laying length, can detect the temperature at weak links of the equipment, cables, etc., and is arranged at the weak links to realize the timely detection of fire. When there is no open fire, it can also automatically burn when the ambient temperature reaches about 170°C ± 10°C. When the set temperature is reached, the chamber connected to the heat-sensitive wire burns and sprays aerosol first, and the ignition wire is ignited until the aerosol generating agent in the chamber adjacent to the chamber connected to the heat-sensitive wire 11 is triggered, and the subsequent chambers are triggered one by one.

[0018] One embodiment has a disc 4 as the main body, which is provided with three chambers, namely a first chamber 1, a second chamber 2, and a third chamber 3, separated by a partition 5 with an included angle of 120 degrees. The storage amount of the aerosol generating agent in each chamber is determined according to the area of the protected area in the space. The ignition wire 10 passes through the curved channel provided in the partition 5. The ejection port 6 is provided on the side wall of the chamber. A baffle 7 is provided around the ejection port 6. The baffle 7 has a curvature and an L-shaped cross section, and is fixed to the outer wall of the disc 4.

[0019] Another embodiment has a square column 8 as the main body, which is provided with three chambers, namely a first chamber 1, a second chamber 2, and a third chamber 3, separated by a flat partition 9. The ignition wire 10 passes through the curved channel provided in the flat partition 9. The ejection port 6 is provided on the side wall of the chamber. A baffle 7 is provided around the ejection port 6. The baffle 7 has an L-shaped cross section and is fixed to the outer wall of the square column 8.

[0020] For fixation, a fixing structure can be connected to the main body, which is used to fix the device to the wall board or wall of the installation location. Structures such as an Ω-shaped hoop with screw holes on both sides and an L-shaped mounting piece ( Figure 5 ) are used, and the device is fastened to the wall board at the installation position with screws.

[0021] The partition 5 is made of heat-insulating and flame-retardant material. Its function is to prevent the chambers from being ignited and is also used to store the ignition wire connecting two chambers in sequence. The length of the ignition wire can be used to control when the fire extinguishing agent in the next chamber is ejected after the agent in one chamber is ejected. When a long interval is required, the length of the ignition wire is increased; when a short interval is required, the length of the ignition wire is decreased. It is specifically determined by tests.

[0022] The baffle 7 around the ejection port 6 first bears the high-temperature aerosol and is required to be heat-resistant not less than 200 °C. After the aerosol generating agent is ignited and ejected, it is first ejected onto the baffle 7. After being blocked in the original ejection direction, it turns to diffuse outward along the surface of the baffle and fills the entire space, preventing the components or cabinets around the ejection port from being burned or damaged.

[0023] The hot aerosol generating agent is segmented, with an interval set in the middle, and a connection is set in the interval. According to the equipment situation in the fire extinguishing space and the characteristics of the combustibles in the fire, the number of chambers of the hot aerosol generating agent and the length of the connection of the ignition wire in the interval are determined by tests. The longer the length, the longer the interval time for the agent to be ejected. The number of chambers is mainly two or three, and more than three can be used if necessary. General combustibles can be divided into two chambers. After the hot aerosol is ejected once for initial fire extinguishing and then ejected again, it ensures complete fire extinguishing. When the combustible gas generated during the combustion of the combustibles is likely to be hidden inside, the number of chambers is increased, such as in a new energy battery compartment.

[0024] (1) For example, in the case of a new energy battery compartment, since combustible gases are likely to accumulate inside the battery, after the aerosol is sprayed, the combustible gases are likely to be released again and cause reignition. Three or more chambers can be set up. After the first initiator triggers the spraying for fire extinguishing, after a period of time, this period allows the release of combustible gases. Then, the second initiator triggers the spraying for fire extinguishing. After another period of time, this period allows the continuous release of combustible gases. Then, the third initiator triggers the spraying for fire extinguishing. Ensure that the combustible gases are completely released, ensure complete fire extinguishing, and prevent reignition.

[0025] (2) For example, for spaces such as switchgear, two can be set up. After the first initiator triggers the spraying for fire extinguishing, after a period of time, this period allows the release of combustible gases. Then, the second initiator triggers the spraying for fire extinguishing to ensure complete fire extinguishing and prevent reignition.

Claims

1. A hot aerosol fire extinguishing device with multiple stage spraying, comprising a main body, characterized in that At least two chambers are provided in the main body, aerosol generators are placed in the chambers, and injection ports are provided on the chamber walls. One end of a thermal wire is exposed and the other end extends into the aerosol generator in one of the chambers. The chambers are separated by heat-insulating flame-retardant materials. A curved channel is provided in the heat-insulating flame-retardant material. An ignition wire is provided in the channel. Both ends of the ignition wire extend into the aerosol generator in adjacent chambers. Multiple chambers are provided and connected in sequence by the ignition wire. When a set temperature is reached, the chamber connected to the thermal wire burns and injects aerosol first. The ignition wire is ignited until the aerosol generator in the chamber adjacent to the chamber connected to the thermal wire (11) is ignited, and the following chambers are ignited one by one.

2. The hot aerosol fire extinguishing device with multiple stage spraying according to claim 1 is characterized in that The main body is a disc (4) having three chambers, namely a first chamber (1), a second chamber (2) and a third chamber (3), which are separated by a partition (5) with an intersection angle of 120 degrees. The ignition wire (10) passes through a curved channel provided in the partition (5). The injection port (6) is provided on the side wall of the chamber. A baffle (7) is provided on the periphery of the injection port (6). The baffle (7) has an arc and an L-shaped cross section and is fixed to the outer wall of the disc (4).

3. The hot aerosol fire extinguishing device with multiple stage spraying according to claim 1 is characterized in that The main body is a square column (8) having three chambers, namely a first chamber (1), a second chamber (2) and a third chamber (3), which are separated by a flat partition (9). An ignition wire (10) passes through a curved channel provided in the flat partition (9). An injection port (6) is provided on a side wall of the chamber. A baffle (7) is provided on the periphery of the injection port (6). The baffle (7) has an L-shaped cross section and is fixed to the outer wall of the square column (8).

4. The hot aerosol fire extinguishing device with multiple staged spraying according to claim 2 or 3, characterized in that The main body is connected with a fixing structure for fixing the device on a wall plate at a placement location.

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