RU2061876C1 - Device for remote isolation of mine working - Google Patents

Abstract

FIELD: mining. SUBSTANCE: device for isolation includes transportation self-motion trolley with inhibitor tank, elastic tanks installed on it. Removable bubbling pools of froth aerosol are built in the inhibitor tank. The bubbling pools are open to elastic tanks through outlet passages. The passages are oriented towards the working being isolated, are provided with passages of excessive pressure, pyrotechnic fire extinguishing generators of remote start are used as compressed air sources. EFFECT: decreased material consumption. 3 dwg

Description

 The invention relates to the mining industry and can be used to isolate emergency sections of mine workings and to quench the energy of the shock wave generated by the explosion of coal dust and methane-air mixture.

 There is a method of extinguishing a fire in a dead end, including the supply of foam to the fire through a pipeline after it is laid by moving a self-propelled cart (ed. Certificate of the USSR N 1700262, class E 21 F 5/00, 1989).

 The disadvantage of the device for implementing the method is the limited ability of tactical reception to extinguish a fire in the dead-end workings of long mines due to the device being connected by a pipeline to a compressed air energy source.

 A device for the localization of coal and gas emissions in preparatory workings, including a transport trolley with a rotary platform and elastic containers placed on it and filled with compressed gas with a pneumatic distribution system (ed. Certificate N 1020588, class E 21 F 5/00, 1983.

 The disadvantage of the device is the low reliability of the device, which reduces the safety of mining and rescue operations. This is due to a single pneumatic distribution system and the inability to remote control.

 The purpose of the invention is the expansion of the tactical capabilities of remote methods of extinguishing a fire, increasing the safety of work due to the autonomy of the isolation system and suppressing the source of fire.

 This goal is achieved in that in a device for remote isolation of a mine working area, including a self-propelled transport trolley, a foaming tank with bubblers and flexible containers with a pneumatic distribution system, the foaming tank is equipped with outlet pipes with dispersants in the form of foam-generating nets placed in their cross section. In this case, one of the nozzles is in communication with a pneumatic distribution system of elastic containers, and the other is configured to orient it towards the emergency section and is equipped with an overpressure valve. Moreover, pyrotechnic inhibitor gas generators with their nozzles in the reservoir below the level of the foaming agent solution were used as bubblers.

 The proposed set of distinctive features allows you to quickly create an insulating structure with the possibility of transportation (building up) of a foam plug through the use of pressure-generating gas generators of aerosols of high inhibitory action, remote start-up, reliability and ease of production of aerosol foam with increased productivity, autonomy and high mobility of the device to the fire zone under the protection of the device. This increases the possibility of quenching the energy of the shock wave, which can be formed, for example, in the explosion of coal dust or methane-air mixture.

 In Fig 1 shows a layout diagram of a device for remote isolation of a mine in a transport position; figure 2 is the same in working condition; in Fig 3 conditionally schematic diagram of this device.

 A device for remote isolation of a mine working consists of a self-propelled transport platform 1 with a drive 2, a reservoir 3 with a foaming agent solution installed on it and equipped with outlet pipes 4 and 5. On the platform 1, there are also placed sets of elastic containers 6 communicated with each other via a pneumatic distribution system 7 with non-return valves 8. At the bottom of the tank 3 there are chambers 9 and 10 with pyrotechnic gas generators 11 of an inhibitory effect, the exhaust nozzles 12 of which are put into reserve Ar 3 to the level of foaming agent solution. Dispersants in the form of foam-generating grids 13 are inserted into nozzles 4 and 5. Moreover, nozzle 4 is in communication with a pneumatic distribution system 7, and nozzle 5 is equipped with an overpressure valve 14 and is configured to orient it towards the emergency section of the mine working 15. Transport platform 1 is connected by a cable 16 with a winch 17 to control its movement from the place of production of work after their completion. Mining 15 in accordance with safety rules is equipped with a fire-irrigation pipe 18 with bends 19, equipped with connecting heads 20.

 The device operates as follows.

 In the event of a fire in the mine working 15, a cable 11 of the winch 17 is attached to a fully equipped and filled with foam-forming solution 1 self-propelled transport platform 1 and a drive 2 operating on an autonomous gas generator is turned on. Rewinding the cable 11 from the winch drum 17, the platform 1 begins to move automatically along the rail track 15 to the scene of the accident. At the closest approaches to the fire, the drive 2 is switched off remotely and the pyrotechnic gas generators 11, which are located in the chamber 9 and 10, are also switched on and off by remote switching, while hot gases flowing out of the nozzles 12 due to their placement in the lower part of the tank 3 come under the level of the foaming agent solution and sparging it intensively, forming an aerosol foam with the solution, i.e., a foam whose gas and liquid phases are saturated with sols of substances of high inhibitory effect. The resulting foam through the nozzle 4 is fed into the pneumatic distribution system 7 and then through the check valves 8 it is directed to fill the elastic containers 6 under pressure. Passing through the foam generator 13 located in the nozzle 4, the foam is dispersed, acquiring an ordered fine-mesh structure, which makes it possible to significantly increase its resistance .

 Under the pressure of the foam, the elastic containers 6 are pushed out of the transport stacks and, expanding, block the mine working section 15. After reaching the specified pressure of the foam in the tank 3, the valve 14 and the aerosol foam are activated, passing the nozzle 5 directed towards the fire, and dispersing on the grid 13, begins to flow to fill the mine 15, forming a foam curtain. In this case, the elastic containers 6 due to the built-in non-return valves 8 are self-locking and create a reliable support wall for self-transportation of aerosol foam, which, as the mine is filled, moves in the form of a cork towards the fire, blocking the access of fresh air from the existing mine workings. In the process of operation of the device, the foaming agent solution in the tank 3 can be replenished through the fire-irrigation pipe 18 or by a pump by means of folding fire hoses. A winch 17 with a cable 16 is used to transport the platform 1 after completion of the fire extinguishing work in the development 15.

 The proposed device makes it possible to provide operational temporary isolation of a mine working in a fire and to increase the safety of mining and rescue operations to eliminate accidents. YYY2

Claims (1)

 A device for remote isolation of a mine, including a self-propelled transport trolley and flexible containers with a pneumatic distribution system, characterized in that it is equipped with a foaming reservoir with bubblers and outlet pipes, one of which is connected to the pneumatic distribution system of elastic containers, and the other is oriented towards the emergency section generation and is equipped with an overpressure valve, and both outlet nozzles have dispersants made in the form of foam mesh and as inhibitors pyrotechnic gas generators of inhibitory action were used, the nozzles of which are placed in the reservoir below the level of the foaming agent solution.

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