SU1351615A1 - Arrangement for protecting manъs head from heat radiation - Google Patents

Abstract

The invention relates to individual means of protecting a person from heat radiation and can be used in combination with other personal protective equipment in conditions characterized by the sudden onset of a flame with intensity 7 i. (L 00 sl e: ate

Description

one

It is intensively increasing thermal radiation and the subsequent gas contamination by toxic products of combustion. The aim of the invention is to increase the effectiveness of protection against exposure to intense heat radiation by creating a screening fire extinguishing layer, as well as increasing the time margin for evacuating a person from the gas area with toxic combustion products by preventing leakage from the air source. The device contains halos 1 with a window mounted, On the flap 2 of which the handle 3 is located, it has a capacity of 4 with an extinguishing powder composition, which

The invention relates to individual means of protecting people from thermal radiation and can be used in combination with personal protective equipment in conditions characterized by the sudden occurrence of a flame with intensely increasing thermal radiation and the subsequent gas contamination by toxic combustion products.

The point of the invention is to increase the protection efficiency of the exposure to intense heat radiation by creating a screening fire extinguishing layer, as well as increasing the time reserve for evacuating a person from the gas area with toxic products of combustion. To prevent leakage from the air source.

Fig. 1 shows a device for protecting the head from heat radiation; figure 2 - section aa on Lig.1; figure 3 - section bb in figure 1.

The device comprises a helmet 1 with a viewing window, on a movable transparent shield 2 of which the handle 3 is located, a container 4 with an extinguishing powder composition that is fixed above the viewing window on the helmet 1 and has an aperture 5 with perforated Porsche 6, connected by pipeline 7 with throttle unit 8 having low chokes 9

615

The ram is fixed above the viewing window on the helmet 1 and has an atomizer 5 with holes and a perforated gap 6, connected by a pipeline 7 with a throttle unit 8 having a low pressure throttle 9 and a high pressure throttle 10, into which air enters through the starting device 11, . connected to the inlet pipe 12 and containing the housing 13, the membrane 14, the needle 15, the lever 16 mounted by axis 17 on the housing 13, and the pawl 18 connected by a cable drive 19 to the shield 2 to which the air duct 20 fits. . f-ly, 3 ill.

t5

5 o

-

25

thirty

and high pressure 10, into which air enters through a triggering device 11 connected to an inlet - w; it has a pipe 12 and contains a housing 13, a membrane 14 that intercepts the inlet opening of the housing, a needle 15, a lever 16 mounted through an axis 17 on the housing 13, and a dog 18 connected by a cable drive 19 to the face shield 2, to which the air duct 20 fits.

The device works as follows.

In the event of a flame, using the movement of his hands, based on the natural reaction, cover his face with his hands, the person by the handle 3 lowers the flap 2, the cable drive 19 is not and pulls the pawl 18 out of engagement with the lever 16, which presses on the needle 15, piercing diaphragm 14. Out of engagement with the pawl 18, the lever 16 allows the needle 15 to spring up under the action of the spring and open the air access from the pipeline 12 through the throttles of the high 10 and low 9 pressure, exited in the throttle unit 8, to the pipeline 7 and the air duct 20. Under the influence the air pressure is driven by a perforated piston 6, which pushes the OPS from the tank 4 through the nebulizer 5, creating a shielding and simultaneously fire extinguishing powder

layer that protects the face of a person at the moment of his exit from the fire.

At the same time, through the low pressure throttle 9, air flows through the duct 20 to the respiratory organs and to blow the inside of the shield 2 from fogging.

Due to the fact that the holes of the perforated plate 6 and the spray gun 5 are biased relative to each other, after the supply of the porops stock is exhausted, the air supply through the high pressure throttle 10 is stopped and its flow is continued only through the low pressure throttle 9, which allows to significantly increase time for evacuation of a person from the gas contamination zone with toxic products of combustion.

Claims (2)

1. A device for protecting a human head from the effects of heat 5D1, comprising a slot with an air duct formed by the inner and outer shells and connected to an autonomous air source, an observation window provided with a descending transparent face shield, characterized in that, in order to increase efficiency protection against the effects of intense heat ten 15 20 25 so 1615, radiation due to the creation of a fire extinguishing shielding layer, it is equipped with a container with an extinguishing powder located above the viewing window, containing a perforated piston and sprayer, a throttle unit with a high pressure throttle, a pipeline connected to the container with an extinguishing powder and a low choke pressure connected to the duct, and the throttle unit inlet is connected to an air source through a triggering device, including a housing in which the membrane is located, blocking The inlet is in contact with a needle, spring-loaded relative to the body and connected to a lever mounted via an axis on the body and connected by a cable drive to a dog with a transparent face shield equipped with a handle for lowering it. 2. The device according to claim 1, characterized in that, in order to increase the time reserve for evacuating a person from the gas area with toxic combustion products by preventing leakage from an air source, the holes in the piston are made with mixing with respect to the holes in the sprayer. CP About OJ Compiled by R.Huseynov Editor N.GLvydka Tehred I.Veres Corrector A.T. Order 5514/5 Circulation 430 Subscription VNIIL of the USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 (oh oh oh oh) fi.Z -L-b