RU182426U1 - DEVICE FOR AUTOMATIC COOLING OF CASUAL SPACE OF PROTECTIVE CLOTHING - Google Patents

Abstract

The proposed utility model relates to personal protective equipment that protects a person from thermal effects of thermal damaging factors (TPF), and can be used in conjunction with other protective equipment, as well as find application in the development of protective personal protective equipment kits, personal protective equipment for emergency and rescue personnel services. The device for automatically cooling the undersuit space of protective clothing contains a mesh suit with a system of flexible tubes with side holes up to 1.5 mm in diameter along the entire length, which is connected through solenoid valves, a gas reducer with a carbon dioxide tank placed in a cold (heat) insulating case, At the same time, the solenoid valve control unit operating from the battery by the electric signal from miniature thermal sensors located along the tube system provides a local automatic the supply (termination of supply) of carbon dioxide in the undersuit space through a system of tubes to the area of the suit, where the sensor is located, which supplied the electrical signal by opening the electromagnetic valves. Upon reaching the minimum critical temperature threshold of 46 ° C in the undersuit space in the TPF exposure zone, a signal is sent from the sensors through the control unit to turn off the electromagnetic valves. Thus, the advantages of the inventive device for automatically cooling the undersuit space of protective clothing include an increased degree of protection of a person in protective clothing under the sudden influence of high-intensity optical radiation, radiant and convective components of the fire flame, flammable liquids, gas-flame flows, high-temperature fields, in addition, the device allows to increase worker safety and labor productivity, simplify maintenance operation period.

Description

The utility model relates to personal protective equipment that protects a person from the thermal effects of thermal damaging factors (TPF), and can be used in conjunction with other protective equipment. This device can be used at the enterprises of the nuclear, chemical, metallurgical industries, as well as find application in the development of systems for protective sets of combat personal equipment, personal protective equipment for emergency personnel.

A known system of air distribution in the undersuit space of a heat-insulating suit [1]. This air distribution system in the undersuit space of a thermally insulating suit contains a tube system mounted on the inside of the suit and connected to a chilled air power source.

This system has the following disadvantages:

- a constant supply of chilled air into the undersuit space can lead to hypothermia;

- the presence of air blowing into the undersuit space will contribute to the process of burning (smoldering) of the costume material when flammable liquid burning mixtures fall on it.

There is also known a method of thermal protection of the human body and a device for its implementation when working in an environment with high temperature, based on solid carbon dioxide with forced constant ventilation of the suit space with cooled, dried air [2]. At the same time, the low-temperature gaseous carbon dioxide formed during the sublimation of solid carbon dioxide is supplied isolated from the air flow into the interlayer space of heat-protective clothing, and, after circulation in the interlayer space, it is released into the atmosphere.

The disadvantage of this method is that it was developed as a method of thermal protection and for work in an environment with high temperature. The use of this double cooling method (with chilled air and low-temperature gaseous carbon dioxide) under normal conditions, and even more so under conditions of low ambient temperature, will lead to rapid hypothermia of the body.

The closest in technical essence is an autonomous human cooling system [3], which contains a container with a refrigerant, a refrigerator, a liquid cooling suit, an air-driven circulation pump, a jet trigger with separate inputs, made in the form of an ink element with a jet sticking to the wall with two outputs, two control and two ventilation ducts.

The main disadvantage of this system is:

- the presence of mechanical control of the cooling system;

- a complex mechanical dual-circuit gas distribution system - the presence of two systems (coolant and refrigerant circulation);

- the need for pre-setting the pressure of evaporation of the refrigerant and the intensity of cooling before using it.

The objective of this utility model is to eliminate these drawbacks, namely, to ensure individual protection of a person from the sudden effects of high-intensity TPFs - high-intensity optical radiation (VOI), the radiant and convective components of fire flames, flammable liquids, gas-flame flows, and high-temperature fields (HTF).

The problem is solved in that the device for automatically cooling the undersuit space of protective clothing, including a container with carbon dioxide, according to the proposed solution, contains a mesh suit with a system of flexible tubes with side holes with a diameter of up to 1.5 mm along the entire length, which is connected through electromagnetic valves, gas reducer with a carbon dioxide tank placed in a cold (heat-) insulating cover, while the battery-operated solenoid valve control unit by electrical signal The luminaire from miniature thermal sensors located along the tube system provides local automatic supply of carbon dioxide into the undersuit space through the tube system to the suit section, to the location of this sensor depending on the temperature in the undersuit space.

The technical result that can be obtained by implementing the utility model is based on lowering the temperature in the zone of possible ignition of protective clothing and displacing air from the structure of its fabric with gas that does not support combustion.

The claimed technical solution is illustrated by diagrams, where in FIG. 1 shows a diagram of the proposed device for automatic cooling of the undersuit space of protective clothing, and in FIG. 2 is a diagram of the mutual arrangement of the main elements of the device for automatically cooling the undersuit space of protective clothing.

The device for automatically cooling the undersuit space of protective clothing contains a mesh suit 1, a system of flexible tubes 2 having side holes with a diameter of up to 1.5 mm along the entire length, electromagnetic valves 3, a container with carbon dioxide 4, placed in a cold (heat) insulating case, gas reducer 5, solenoid valve control unit 6 and accumulator 7.

The inner diameter of the tubes 2 and the diameters of the holes on them are calculated in such a way as to ensure a uniform exit of carbon dioxide from all the holes of the tubes regardless of their removal from the tank. The number of tubes and the number of holes on them depends on the breathability of the material of the outer layer of protective clothing. A material with high breathability will require the use of more tubes and holes in them, a material with less breathability will require fewer tubes with fewer holes. On the tubes, in places of their bending, elements are provided that impede the clamping of the tubes.

As a container 4 for storing carbon dioxide, it is possible to use a combined tank of a flat-oval shape. The combined capacity consists of two shells. The thin-walled inner shell (liner) is designed to seal the tank, and the outer shell (cocoon) is made of high-strength composite materials and is the power structure of the tank. The use of this design allows you to create a tank lighter than steel tanks [4]. The flat-oval shape allows you to conveniently place the container under the outer layer of protective clothing. The container with carbon dioxide is placed in a cold (heat-) insulating cover with a material thickness of 20-30 mm.

Thermal sensors 8 form a distributed system for recording the fact of exposure to TPF and determining the place of its impact.

The proposed device operates as follows.

Local thermal effect (in one form or another) on the protective clothing causes heating of its outer layer, as well as the space under it and the miniature thermal sensor 8, located in the suit space in the impact zone. When registering a critical temperature (48.7 ± 2) ° С with a sensor of a distributed system of thermal sensors, the solenoid valve control unit 6 for a short time opens the solenoid valves 3 for tubes passing in the immediate vicinity of the miniature heat sensor. Carbon dioxide from the tank 4 through the gearbox 5 and the open valves 3 enters the tube system 2 and exits the holes, while the temperature of the protective clothing areas (clothing materials and undersuit space) decreases near the gas exit points and the sensor itself. Upon reaching the minimum critical temperature threshold of 46 ° C in the undersuit space in the TPF exposure zone, a signal is sent from the sensors through the control unit to turn off the electromagnetic valves.

If the thermal effect continues, the warm sensor heats up again and, when the critical temperature is reached, the control unit opens the corresponding valves again, etc., until the thermal effect stops or the carbon dioxide reserves in the tank run out. In case of one-sided heat exposure (when exposed to VOI or being on the border of an ECP or a fire), several thermal sensors reach a critical temperature, and the control unit opens valves for tubes passing in the immediate vicinity of these sensors.

Thus, the advantages of the inventive device for automatic cooling of the undersuit space of protective clothing include an increased degree of protection of a person in protective clothing when exposed to high-intensity optical radiation, radiant and convective, components of fire flames, flammable liquids, gas-flame flows, high-temperature fields, in addition, the device allows improve worker safety and labor productivity, simplify maintenance in Heat-operation.

Literature

1. Patent for the invention of the Russian Federation No. 2091046, class. A41D 13/00. Air distribution system in the undersuit space of a thermally insulating suit, publ. 09/27/1997.

2. RF patent 94009882/12, class. A62B 17/00. The method of thermal protection of the human body and device for its implementation, publ. 05/20/1997.

3. Copyright certificate SU No. 1107360, cl. A62B 17/00. Autonomous human cooling system, publ. 10/15/1986.

4. RF patent 2187746 class. F17C 1/06. Metal liner, high-pressure metal-plastic cylinder (options) and a method for manufacturing a high-pressure metal-plastic cylinder, publ. 08/20/2002.

Claims (1)

A device for automatically cooling the undersuit space of protective clothing, including a container with carbon dioxide, characterized in that it contains a mesh suit with a system of flexible tubes with side holes up to 1.5 mm in diameter along the entire length, which is connected via electromagnetic valves, a gas reducer with a dioxide capacity carbon, placed in a cold (heat) insulating cover, while the battery-operated solenoid valve control unit by electrical signal from miniature thermal sensors is located along the tube system, it provides local automatic supply (cessation of supply) of carbon dioxide into the undersuit space through the tube system to the suit section in the sensor location area depending on the temperature in the undersuit space.

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