RU201821U1 - Pulse spray powder fire extinguisher - Google Patents

Abstract

The proposed utility model relates to the field of fire and rescue equipment, in particular to the class of devices for spraying fire-extinguishing and light-heat protective compositions (OZS) for extinguishing fires, arson in the first seconds, tens of seconds after their detection, small fires, as well as for self- rescue: extinguishing burning clothes, providing an escape route through a burning door, window, staircase, section of the corridor. The fire extinguisher contains a barrel body, inside which a gas generating unit is installed. The gas-generating unit includes a gas-generating composition, covered with a flat cardboard wad, behind which a cylindrical recess is made, passing into a hemispherical chamber, covered with a wad. The wad that covers the hemispherical chamber is made in the form of a cylindrical glass. The technical result from the use of the proposed utility model is to increase the efficiency of extinguishing the fire source. 1 wp f-ly, 3 dwg

Description

The utility model relates to the field of fire and rescue equipment, in particular to the class of devices for spraying fire extinguishing and light-heat protective compounds (OZS) for extinguishing fires, arson in the first seconds, tens of seconds after their detection, small fires, as well as for self-rescue : extinguishing burning clothes, providing an escape route through a burning door, window, staircase, section of the corridor.

The closest in technical essence and the achieved technical result to the proposed utility model is a pulsed powder spraying fire extinguisher, protected by the patent RU 197664 U1, class. A62C13 / 00, publ. 05/21/2020, taken as the closest analogue (prototype).

The prototype fire extinguisher contains a cylindrical barrel body with thin walls, made of polyamide with various types of fillers or polyethylene. A guard is located on the barrel-body to increase the area of the back of the palm and to exclude palm injuries when the gas-generating unit is triggered. Also, the barrel body has rings for a more firm hold by hand. The muzzle of the body is sealed with a sealed polyethylene gasket, on which a quick-release cover made of polyethylene or plastic is tightly fitted on top to protect the membrane from damage. A gas-generating unit is installed in the barrel-housing, equipped with a tension initiator, on which the gas-generating composition is tightly placed. The gas-generating composition is closed with a dense, thick wad, behind which the cylindrical recess turns into a hemispherical concave, closed by the wad, this is a spherical space - a chamber between the concave surface and the wad. A "skirt" is located on the body of the gas generating unit, which protects the extinguishing powder from moisture penetration, and also prevents gases from escaping between the barrel body and the body of the gas generating unit when the gas generating unit is triggered. The initiator is driven by a pull cord, at the end of which a ring is fixed, by which the cord is pulled or twitched. On the side of the pull cord, the barrel body has a threaded element onto which a safety threaded cap is screwed on. Between the inner surface of the threaded cover and the edge of the threaded element of the barrel housing, there is a sealing gasket made of elastic material, which ensures guaranteed protection of the internal elements of the fire extinguisher from moisture and dust. The technical result from the use of the utility model is to reduce the weight and increase the strength of the fire extinguisher.

The disadvantages of the device according to the prototype include the not guaranteed creation of uniformity of spraying of fire extinguishing powder under the action of a spray wave of gases, due to the property of the powder to cake during prolonged storage, as a result of which an air cavity is formed inside the fire extinguisher, not filled with fire extinguishing powder. A flat wad made of cardboard, located between the fire extinguishing powder and the gas generating unit, is rotated under the action of a spray wave on one side and an unevenly packed fire extinguishing powder on the other side. A spray wave of gases under pressure rushes along the path of least resistance into the air cavity not filled with fire extinguishing powder and then leaves the fire extinguisher without creating proper pressure on the fire extinguishing powder, which leads to the absence of a cone-shaped gas-powder emission and, as a consequence, to a decrease in the efficiency of extinguishing the fire.

The task of the utility model is to improve the fire extinguisher of pulsed powder spraying.

The technical result from the use of the proposed utility model is to increase the efficiency of extinguishing the fire source.

The task is achieved by the fact that in a pulsed powder spraying fire extinguisher containing a barrel-housing, inside which a gas-generating unit is installed, including a gas-generating composition, closed with a flat cardboard wad, behind which a cylindrical recess is made, passing into a hemispherical chamber, closed with a wad, a wad covering the hemispherical a chamber made in the form of a cylindrical glass; the wad covering the hemispherical chamber is made of plastic.

FIG. 1 shows a general view of a pulsed powder spraying fire extinguisher.

FIG. 2 shows the outlet of the generated gases under pressure with a wad in the form of a cylindrical cup made of plastic in the inventive powder pulse spraying fire extinguisher.

FIG. 3 shows the outlet of the generated gases under the pressure of a fire extinguisher, taken as a prototype, with a flat wad made of cardboard.

Structurally, the powder pulse spraying fire extinguisher in FIG. 1, 2 contains:

1 - barrel-body;

2 - gas generating composition;

3 - flat cardboard wad;

4 - cylindrical groove;

5 - hemispherical chamber;

6 - wad covering the hemispherical chamber,

7 - fire extinguishing powder;

8 - air cavity;

9 - gasket.

A gas generating unit is made inside the barrel housing 1.

The gas generating unit includes a gas generating composition 2, covered with a flat cardboard wad 3, a cylindrical recess 4, which passes into a hemispherical chamber 5, closed with a wad 6.

Wad 6, covering the hemispherical chamber 5, is made in the form of a cylindrical glass.

The wad 6 covering the hemispherical chamber 5 is made, for example, of plastic.

The assembly of the proposed utility model is carried out as follows.

A gas-generating unit is installed in the barrel-housing 1, consisting of a gas-generating composition 2, which is closed with a flat wad 3, a cylindrical recess 4, which passes into a hemispherical chamber 5, which is closed with a wad 6. Then the barrel housing 1 is filled with fire extinguishing powder 7 and on the muzzle of the housing - barrel 1 soldered sealing gasket 9 made of elastic material.

The proposed utility model works as follows.

After activating the gas-generating composition 2, a wave of generated gases under pressure is formed, which pushes out the flat cardboard wad 3, forcing it to move along the cylindrical recess 4 towards the hemispherical chamber 5, after which they act on the wad 6, which begins to move inside the barrel housing 1 in the side of the fire extinguishing powder 7 and the air cavity 8, not filled with fire extinguishing powder, without distortions. Under the action of the pressure of the generated gases and the stripping force of the sealing gasket 9 soldered to the barrel body 1, the fire extinguishing powder 7 uniformly fills the inner cavity of the barrel body between the wad 6 and the gasket 9, the air cavity 8.

The execution of the wad 6, which covers the hemispherical chamber 5, in the form of a cylindrical cup, provides a guaranteed cone-shaped gas-powder emission, which increases the efficiency of extinguishing the fire source.

Claims (2)

1. Powder pulsed spraying fire extinguisher, containing a barrel-housing, inside which a gas-generating unit is installed, including a gas-generating composition, closed with a flat cardboard wad, behind which a cylindrical recess is made, turning into a hemispherical chamber, closed with a wad, characterized in that the wad covering the hemispherical chamber , made in the form of a cylindrical glass. 2. A fire extinguisher according to claim. 1, characterized in that the wad covering the hemispherical chamber is made of plastic.

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