JPH04853Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Industrial Application Field) This invention relates to a powder fire extinguisher to be installed in transportation facilities and other places where there is vibration. (Prior Art) A fire extinguisher that injects high-pressure gas into a container from a high-pressure gas cylinder to release a powdered chemical in the container will be described with reference to the drawing of the fire extinguisher of this invention, FIG. 1. In this type of fire extinguisher, a discharge pipe 3 for discharging chemicals extends to the bottom of the container 1, and a sealing plate is provided at the lowest end. This sealing plate plays a role in that when the gas from the high-pressure gas cylinder 2 is introduced into the container 1, the high-pressure gas temporarily accumulates in the container 1, and the high-pressure gas uniformly spreads within the medicine, stirring the medicine. . This structure is also used for fire extinguishers installed in vehicles that constantly vibrate, such as automobiles. (Problem to be solved by the invention) However, with the dry powder fire extinguisher having the structure described above,
If the product is installed in a place where there is vibration for a long period of time (especially vertical vibration perpendicular to the sealing plate surface), the sealing plate is generally made of a rubber membrane or a thin polyester film, so it may not come in direct contact with the sealing plate. In many fire extinguishers, this sealing plate is already torn before use due to friction or impact from the powdered chemicals in the fire extinguisher. It will be released. As a result, a considerable amount of the drug remains in the container,
Deterioration in performance is inevitable. (Means for solving the problem) In order to solve the above problem, the inventor
As a result of various experiments, a solution was found by placing the sealing plate on the drug release tube above the middle of the tube. The fire extinguisher of this invention will be explained with reference to FIGS. 1 and 2. 1 is a container in which a powdered drug is stored.
The high-pressure gas cylinder 2 is opened by an upper lever, and the gas is ejected from the lower part of the gas introduction pipe 7 into the medicine in the container 1, stirring the medicine. When the pressure inside the container 1 reaches a certain value, the gas pressure causes the sealing plate 4 to break, and the medicine is released through the discharge pipe 3 and the hose 8. The sealing plate 4 is lcm (at least 2 cm) from the bottom end of the tube 3.
cm or more), located in the upper position. Therefore, the vibration of the powder vibrating in the container 1 is transmitted in a weakened manner in this lcm tube, and the vibration is transmitted through the thin film rubber.

[Table] This test is for automobiles, and the standard for passing is if it can withstand vertical vibration for 8 hours. The vibration direction in the experiment was the vertical direction, which was the same direction as the discharge tube, and the vibration hit the sealing plate at right angles. Nevertheless, an unexpected effect was obtained simply by positioning the sealing plate slightly above the lower end of the tube. This goes beyond common sense and cannot be achieved through design thinking. (Example) FIG. 2 shows an example of a structure in which the sealing plate 4 is provided in the middle of the tube 3, that is, at the l dimension position. A screw is provided at the lower end of the discharge pipe 3, and a screw is also provided at the upper end sealing plate attachment part 3b of the connecting pipe 3a, so that when connecting the connecting pipe 3a to the discharge pipe 3 with the screw, the sealing plate 4 is accommodated in the sealing plate attaching part 3b. However, if the two tubes 3, 3a are joined together by the gaskets 5, 6, the tube 3 is sealed by the sealing plate 4. The vibration of the powder is weakened by the inside of the tube 3a having the size l, and is transmitted to the sealing plate 4, so that the sealing plate 4 is not damaged. If lcm is 2cm or more, how many cm is it?
But that's fine. (Effects of the invention) With the above-mentioned structure, this invention can withstand vibration for a sufficiently long period of time and maintain its performance by making slight improvements to the powder fire extinguishers commonly used in the past.
You can get a fire extinguisher that can be installed with peace of mind.

[Brief explanation of drawings]

FIG. 1 is a sectional view conceptually showing the vibration-resistant powder fire extinguisher according to this invention. FIG. 2A is a sectional view showing a discharge pipe, and FIG. 2B is a sectional view showing a connecting pipe. 3...Discharge pipe, 3a...Connecting pipe, 4...Sealing plate.

Claims (1)

[Scope of utility model registration request] In a fire extinguisher that injects high-pressure gas into a container 1 from a high-pressure gas cylinder 2 to release powdered chemicals in the container 1, a powdered medicine discharge pipe 3 that hangs down inside the container 1
A vibration-resistant powder fire extinguisher comprising a sealing plate 4 provided at the bottom of the tube, and the sealing plate 4 being positioned at least 2 cm or more above the lower end of the tube 3.