SU1203247A1 - Explosion-protection arrangement for mining cutter-loader - Google Patents

Description

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The invention is absent. to the mining industry and can be used to prevent outbreaks and explosions of methane in the bottomhole when working mining combines.

A device of explosion protection of a mining combine is known, which includes a fan mounted on a combine, a pipeline with a water nozzle, and a water nozzle with an inlet pipe and a nozzle ij.

A disadvantage of this device is the low efficacy of anti-explosion protection due to the irrational shape of the water-air jet.

Closest to the invention is a mining combine explosion protection device, including a fan mounted on the combine, a connecting pipe with a water nozzle and an air-water nozzle with a nozzle z.

The disadvantage of this device is the relatively low efficacy of explosion protection, due to the low activity of the water-air flow coming out of the nozzle and significant water losses on the power supply.

The purpose of the invention is to increase the efficiency of explosion protection and activate the water-air flow exiting the nozzle by reducing the loss of dispersed water to the drain.

This goal is achieved by the fact that in an explosion-protection device of a mining combine, including a fan mounted on a combine, a connecting pipe with a water nozzle and a water nozzle with a nozzle, the nozzle is provided with an annular protrusion located on the inner surface of its output end, while the interface of the annular protrusion With the inner surface of the nozzle from the side of its inlet orifice is made according to a concave curve, and the diameter of the specified annular protrusion is less than the diameter of the inlet,

FIG. 1 shows a device for protection of a mining combine, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2; Fig 4-12 - node I in Fig, 3; Fig, 13 - the same, shows the work on the activation of the transition of water into the air-water jet; on

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FIG. 14 - the same, operation of the device of explosion protection of a mining combine.

The mining machine explosion protection device contains a fan 3 located at 5 for preparatory development 2, a fan 3, a water-suction nozzle 4, a connecting pipe 5 and a water nozzle 6. A fan 3 is installed on the 10 running gear of the driving combine 1 from the approach of fresh air from the valve pipeline 7, connecting pipe

5, connecting the fan 3 with a water-t5 air nozzle 4 installed

on a rotary boom 8 with a crown 9

- and rock-breaking tool 10,

can be made flexible or rigid with a swivel and provide the ability to move

water-air nozzle 4 with respect to the fan 3, together with the rotary arrow 8 of the driving combine 1 when processing the bottom during the conduct of preparatory development 2, i

Air nozzles 4 consists of

an inlet 11, a tubular manifold 12 and nozzles 3 for air jets. In order to expand the area of the combine penetration by increasing the efficiency and reliability of explosion protection by improving the use of water, the water-air nozzle 4 is equipped with activators 4

3S water located in the nozzles 13. The activator 14 is made in the form of an annular protrusion. Located along the perimeter of the inner surface of the outlet end of the nozzle 13. The incident surface 15 of the activator 14 with respect to the incoming air flow is concave and has a water disruption line 16 drops may be the same as

 output end 17 of the nozzle 13 (Fig. 4) and do not coincide with the output end 17 of the nozzle 13 (Fig 5-12). The activator 14 can be made integral with the nozzle 13 (FIG. 4-7), can be made

5 as a separate part, installed in the nozzle 13 and permanently connected to it (Fig. 10-12). The cross-sectional shape of the activator 14 may itself be different, but at the same time

55, the incident surface 15 formed by the activator 14, the inner surface of the nozzle 13 and the fastening parts of the activator 14 in the nozzle 13,

for example, by welding (figs, 8 and 9), it must be necessarily concave, made in the form of a smooth curve (figs 4-7 and 12) or from several curvilinear, rectilinear or curvilinear-straight linear segments (fig. 8. 11 ), The inner diameter d of the activator 14 along the line 16 of disruption of water droplets is made smaller diameter D of the inlet of the nozzle 13,

The device of the protection of the mining combine works as follows.

When the miner 1 is turned on, the fan 3 is turned on. Under the action of the dilution created by the fan 3, the air is sucked from the working atmosphere and is fed through the connecting pipe 5 into the air-flow nozzle 4. The air is supplied to the nozzles 13 through the connecting pipe 5. jets 17 - on rock-breeding) instument 10 of a crown 9, displaced and lightening methane around it. When the boom 8 turns, the water-air nozzle 4 is turned along with it, forming an atmosphere with a safe concentration of methane around crown 9. After the crown 9 is brought to the mountain massif and just before the destruction of the mountain massif, water is turned on and sprayed using a water nozzle 6, water escapes with the air in the form of the main water-air flow 18, bounded by the surface 19, and a part of it hits the inner surface of the nozzle 13, it loses energy and in the form of water jets and water droplets 20 considerably lower velocity than the velocity of the air 21, moves to the outlet sop15

20

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13 and the activator 14. Water jets and water droplets 20 move along the incident curvilinear surface 15 of the activator 14 and reach the line of the NII 16 disruption of water droplets, occupying position 22, Since water droplets and jets 20 at position 22 on the line 16 stalls move in direction 23 at an angle to the main water 10 air stream 18, there is a separation of water droplets from the inner surface of the nozzle 13, entry into the air-water stream and separation into small water droplets 24, resulting in water jets and droplets on leaving nozzles 13 do not drain onto the ground dgotovitelnoy generation and used in the water-air jet 25,

Water-air jets 25 after activators 14 nozzles 13 are fed to rock cutting tool 10 crowns 9, dilute and remove methane and cool working crowns of rock cutting tool 10 and destructive traces of rock cutting tool 10 on the bottom, resulting in safe working conditions that exclude the possibility

30 methane flashes.

The proposed device improves the efficiency of preventing methane sprays and the effectiveness of explosion protection through better use of water,

. Reducing heating rock cutting tool also contributes to reducing its consumption during preparatory workings.

An experimental verification of the invention has shown the ability to reduce water losses in comparison with known devices by 3.5-6 times.

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FIG. 2

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FIG. 9

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FIG. 12

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Compiled by A. Gubaylovsky Editor A. Vorovich Tehred: M. Parotsay Proofreader G, Reshetnik

Order 8399/38 Circulation 445 Subscription VNIIPI USSR State Committee

on affairs of inventions and discoveries P3035 ,, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

Claims (1)

(.57 Mining EXPLOSION protection device comprising a fan mounted on the combine, a connecting pipe with a water nozzle and a water-air nozzle with a nozzle, characterized in that, in order to increase the explosion protection efficiency and activate the water-leaving stream leaving the nozzle by reducing the loss of dispersed water to the drain, the nozzle is equipped with an annular protrusion placed on the inner surface of its output end, while the interface surface of the annular protrusion with the inner surface of the nozzle with Rhone its inlet opening is formed by a concave curve, and the diameter of said annular projection is less than the diameter of the nozzle inlet.