a fire extinguisher

Abstract

The invention discloses a fire extinguisher, which comprises a shell, an inner cylinder inserted in the cavity of the shell, and the inner cylinder includes a first inner cylinder inserted in the cavity of the shell along the front and rear directions and storing fire extinguishing agent, slidably The second inner cylinder that stores coolant is sleeved on the side wall of the front end of the first inner cylinder. The shielding portion on the wall that can be shielded from the explosion vent or away from the explosion vent, the explosion vent is located in the shell cavity of the shell, and a vent communicating with the atmosphere is formed between the shell cavity inner surface of the shell and the outer wall of the first inner cylinder. Burst. By opening the explosion vent on the side wall of the first inner cylinder, the explosion and deflagration of the inner cylinder due to excessive pressure in the cylinder is effectively prevented, and at the same time, the explosion vent is arranged in the shell cavity of the outer shell, effectively It prevents the air pressure in the inner cylinder from directly venting out from the explosion-venting port and causing harm to the user and the surrounding environment.

Description

technical field [0001] The invention relates to the technical field of fire protection, in particular to a fire extinguisher. Background technique [0002] Existing portable fire extinguishers are widely used. Although the structure of portable fire extinguishers is small, in some cases, the pressure accumulation may be too large to cause explosion and deflagration, which will cause strong recoil of the fire extinguisher and injure users. , At the same time, in the process of deflagration and explosion, debris will be produced or the objects at the nozzle will break away from the body, causing unexpected damage to the surrounding people and property. For example, in a portable aerosol fire extinguisher, when the powder column in the inner cylinder deflagrates, due to its small nozzle, the hot aerosol gas will accumulate rapidly in the cylinder, and the pressure in the cylinder will rise sharply, so the heat energy will be converted into huge kinetic energy. On the cylinder ...

AI Technical Summary

Problems solved by technology

[0002]Existing portable fire extinguishers are widely used. Although the structure of portable fire extinguishers is small, in some cases, the pressure may be too large to cause explosion and deflagration. As a result, the fire extinguisher will generate a strong recoil force, which will injure the user. At the same time, during the deflagration and explosion, debris will be generated or the objects at the nozzle will break away from the body, causing unexpected damage to the surrounding people and property.

For example, in a portable aerosol fire extinguisher, when the powder column in the inner cylinder deflagrates, due to its small nozzle, the hot aerosol gas will accumulate rapidly in the cylinder, and the pressure in the cylinder will rise sharply, so the heat energy will be converted into huge kinetic energy. On the cylinder body, one part pushes the cylinder cover forward along the direction of the spout, while the other part acts on the cylinder body to generate recoil force in the opposite direction, which will cause serious personal injury when it acts on the user. In addition, due to its high momentum, the flushed cylinder cover will cause accidental injury to the surrounding people or objects after breaking away from the cylinder.

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