RU43772U1 - STAND-ALONE START-UP POWDER EXTINGUISHING MODULE DEVICE - Google Patents

Abstract

The device is intended to initiate the launch of fire-fighting modules without special effects of an electric pulse, namely, to provide an additional function of self-starting of a gas-generating charge in powder fire extinguishing modules. The self-contained device for starting fire-fighting installations allows to reduce inertia in the self-operation mode under the direct influence of a flame (heat signal), improve the stability of the product and, as a result, increase the reliability of extinguishing fires in the early stages of ignition. The specified technical result is achieved in that: the autonomous device for starting the powder fire extinguishing module comprises a chamber configured to exhaust gas, a lid and a gas-generating charge placed in the chamber in contact with the flame-retardant cord, part of which is brought out of the chamber, while the flame-retardant cord is brought out through the lid and a sealing unit, which is made of a thermally intumescent material or in the form of a spring-loaded valve. The device can be made with partial placement of the flame-retardant cord in the chamber in the form of a spiral of at least two turns. The device may include a flame-retardant cord, made combined with a double starting temperature. The device may include a flame-retardant cord, made combined with a variable along the length of the combustion rate. An electroactivator can be additionally placed in the device chamber.

Description

The device is designed to initiate the launch of fire-fighting modules without special effects of an electrical impulse, namely, to provide an additional function of self-starting a gas-generating charge in powder fire extinguishing modules.

A self-contained device for starting fire-fighting installations is known (RF patent for utility model No. 34384, class A 62 C 35/00, publ. 2003). In this device, a 3 ^X step-by-step conversion of a heat signal into an electric one is carried out: porophore-pyrite-electroactivator, from which a fire installation is triggered.

The disadvantages that prevent the use of this device are the design complexity due to the implementation of an additional cooling chamber for the resulting gases and the limited shelf life and operation of this device, which is limited by the characteristics of the porophore.

Known automatic powder fire extinguisher (RF patent No. 2147902, class A 62 C 13/22, 35/00, publ. 2000), which is triggered by an electrical impulse, and also extinguishes in self-extinguishing mode. This mode is ensured by the fact that a chamber with a gas-generating charge is placed in the fire extinguisher, having perforation openings for the release of gases, inside which a flame-retardant cord is placed, which contacts on one side the gas-generating charge and, on the other hand, with an initiating powder placed inside the fire extinguisher body.

Thus, in the self-triggering mode, the heat signal is perceived by the initiating powder through the wall of the fire extinguisher body and a gas-generating charge is transmitted via the fire-resistant cord, which launches the powder fire extinguisher.

This automatic powder fire extinguisher, with any type of operation, ensures uniform distribution of the fire extinguishing powder over the entire extinguishing area.

The disadvantage that prevents the use of this invention in the self-operation mode is the increased inertia, since the heat signal to the fire-conductor cord is transmitted through the wall of the fire extinguisher body and the initiating powder placed inside the fire extinguisher body, which requires additional time until the fire extinguisher is activated and increased heating of the walls of the fire extinguisher, which can lead to its deformation, not a complete opening of the exhaust membrane and not a complete release of extinguishing powder.

The device according to patent No. 2147902, as coinciding with the claimed device according to the largest number of essential features, is selected as a prototype.

The problem to which the proposed utility model is directed is to provide the minimum time necessary for self-operation (self-start) of powder fire extinguishing modules.

The proposed utility model is aimed at solving this problem, the essence of which is to create a device design that can reduce inertia in the self-operation mode under the direct influence of a flame (heat signal), improve the stability of the product and, as a result, increase the reliability of fire fighting in the early stages of ignition.

The specified technical result is achieved by the fact that:

A stand-alone device for starting a powder fire extinguishing module, comprising a chamber configured to exhaust gas, a lid and a gas-generating charge placed in the chamber in contact with the fire-retardant cord, part of which is brought out of the chamber, characterized in that the fire-retardant cord is brought out through the cover and the sealing unit, which made of thermally intumescent material or in the form of a spring-loaded valve.

The device can be made with a partial placement of the flame-retardant cord in the chamber in the form of a spiral of at least two turns.

The device may include a flame-retardant cord, made combined with a double starting temperature.

The device may include a flame-retardant cord, made combined with a variable along the length of the combustion rate.

An electroactivator can be additionally placed in the chamber of the device.

The signs given in the formula of the utility model are necessary and sufficient to achieve the specified technical result, that is, they are essential.

The proposed utility model is not known from available sources of information and is industrially applicable as a stand-alone device for starting a powder fire extinguishing module.

The proposed device is illustrated by drawings.

Figure 1 shows a sectional view of a device for starting a powder fire extinguishing module (MPP), where the sealing unit is made of thermo-expanding material, and figure 2 - the sealing unit is made in the form of a spring-loaded valve, where:

1. camera

2. cap

3. perforations

4. flame retardant cord

5. gas generating charge

6. sealing unit

7. thermal expansion material

8. valve

9. spring

10. stock 11. electroactivator

As a thermal expansion material, for example, the composition of the EPRS based on an inorganic binder (TU 4854-002-17191106-96) is used. Fire-resistant cord according to TU 7275-001-51953776-00. Electroactivator according to TU 7275-082-0751134406-97. Gas-generating charge STK-24 according to TU 4854-019-04973366-01.

The proposed device for launching fire fighting installations is placed in the casing of the powder fire extinguishing module.

The launcher (Fig. 1) consists of a chamber (1), which is installed in the casing of the powder fire extinguishing module (conventionally shown in the drawing), holes (3) for gas venting are made in the chamber (1). The chamber (1) is hermetically closed by a cover (2), in which a sealing assembly (6) is made with an opening for introducing into the chamber (1) a fire-resistant cord (4). Part of the flame-retardant cord (4) located outside can be performed combined, for example, with a double start temperature: one from 80 ° C, and the other from 170 ° C to 500 ° C. This increases the range of its application, since a flame-retardant cord with a starting temperature of 80 ° C ignites and “starts” the flame-retardant cord with a higher ignition temperature.

It is also possible that the flame-retardant cord located outside may have a higher combustion rate of 14-20 mm / s with respect to the flame-retardant cord located inside the housing, 4-6 mm / s or vice versa. That allows you to select the delay time for starting fire extinguishing modules, depending on the space - planning and technological features of the protected object.

A gas generating charge (5) is placed in the chamber (1), which is in contact with the flame-retardant cord (4).

The sealing unit (6) can be made of thermo-expanding material (7), which fills and seals the hole in the lid (1) through which the flame-retardant cord (4) is passed (Fig. 1).

To increase the duration of the heat pulse, the flame-retardant cord (4) is placed in the chamber (1) in the form of a spiral of at least 2 ^X turns that can be processed with the same thermal-expansion material (7).

The sealing unit (6) can be made in the form of a valve (8) (from metal, paronite or other flame-retardant material) with a stem (10) and a spring (9), fixed, for example, with a nut (figure 2). Stand-alone launcher works as follows.

When a certain increased temperature is reached in the protected volume (for example, 170 ° C), that part of the flame-retardant cord (4) ignites that comes out from the cover (2) of the housing (1) of the launch device (Fig. 1). The hole in the lid (2) with a sealing unit (6) in the form of a thermo-intumescent material (7), for example, based on an inorganic binder, which swells under the influence of temperature from the flame-retardant cord (4), increasing several times in volume and completely closes the hole in the lid (1) by sealing this hole after combustion of the flame-retardant cord (4). In turn, the fire-resistant cord (4) transmits a thermal pulse to a gas-generating charge (5) placed in the chamber (1). As a result, gases are released, the pressure in the chamber (1) rises and the gases through the holes (3) enter the internal volume of the fire extinguishing module. Upon reaching a certain pressure inside the module, it is triggered and the fire extinguishing powder is ejected.

The device (figure 2) works similarly, differing in the sealing unit (6), where the flame-retardant cord (4), passing through the hole in the cover (2), burns and releases the hole, which immediately closes with the valve (8) on the stem (10) under action of a spring (9). That prevents the exit of gases and allows you to create the necessary pressure.

Fire tests were carried out in a metal chamber in the form of a parallelepiped with a volume of 20 m ³ . On the floor of the chamber housed metallic round baking area of 0.4 m ² with sawdust soaked with petrol. The test results are presented in table 1.

The commercially available powder extinguishing module under the Buran-2.5 trademark (TU-4854-004-40302231-97), additionally equipped with an autonomous launching device, was mounted under the ceiling at a height of 1.8 m. Gasoline was set on fire. When a certain increased temperature (1 ° = 180 ° C) was reached in the protected volume (or direct exposure to a flame), a part of the fire-resistant cord coming out of the lid ignited, after which the module was triggered with the release of fire-extinguishing powder. The next series of experiments was carried out on foci with an area of 0.65 and 1.1 m ^2, respectively. In the same conditions, a serial module of the Buran-2.5 brand was tested (TU-4854-004-40302231-97), which is a prototype. The test results are presented in the table. The fire tests of prototypes of powder fire extinguishing modules with an autonomous trigger device confirmed that the proposed design increases the reliability of extinguishing fires in the early stages, due to a significant reduction in the inertia of the launch compared to the prototype under direct exposure to a heat pulse.

Moreover, if an electroactivator (11) is placed in the chamber, then the powder fire extinguishing modules can be launched both in the self-starting mode from the proposed device and from an electric pulse (forced start).

The test results confirm that the proposed device is aimed at solving the problem with the achievement of the specified technical result.

Claims (5)

1. A stand-alone device for starting a powder fire extinguishing module, comprising a chamber configured for gas evacuation, a lid and a gas-generating charge placed in the chamber in contact with the fire-retardant cord, part of which is brought out of the chamber, characterized in that the fire-retardant cord is brought out through the cover and the sealing unit which is made of a thermally intumescent material or in the form of a spring-loaded valve. 2. The device according to claim 1, characterized in that the part of the flame-retardant cord placed in the chamber is made in the form of a spiral of at least two turns. 3. The device according to claim 1, characterized in that the flame-retardant cord is made combined with a double starting temperature. 4. The device according to claim 1, characterized in that the flame-retardant cord is made combined with a combustion speed varying in length. 5. The device according to claim 1, characterized in that the electroactivator is additionally placed in the chamber.