RU1768762C - Dust suppressing ejector for ventilation of mine working - Google Patents

Abstract

Usage: mining industry. SUMMARY OF THE INVENTION: an ejector comprises a housing, a head attached to it with a primary and secondary chambers separated by an annular partition and having annular slots. The nozzle for supplying compressed air is in communication with the main chamber, the nozzle for supplying water is in communication with the secondary chamber. The annular slots of the chambers are arranged at an acute angle to each other in the direction of flow of the compressed air. 2 ill.

Description

The invention relates to mining and can be used to ventilate mine workings.

An ejector is known, including a switchgear made in the form of an annular chamber with an annular slot, a diffuser, a nozzle for supplying compressed air and a blade cleaner.

The disadvantage of the ejector is that it does not provide a sufficiently effective cleaning of air from dust.

Closest to the claimed ejector for ventilation of mine workings, comprising a housing, an air nozzle head attached thereto, and an irrigation collector.

A disadvantage of the ejector is the low dust suppression efficiency.

The purpose of the invention is to increase the efficiency of dust suppression by creating a uniform finely dispersed air-air mixture.

This goal is achieved by the fact that in the ejector for ventilation of the mine workings, comprising a housing, a head attached to it to form an annular chamber and an annular gap, a fitting for supplying compressed air according to the invention, the head is provided with an additional annular chamber with a fitting for supplying water adjacent to the main chamber and the gap-forming partition separated from it, while the additional annular chamber is provided with an annular gap made on the side of the gap-forming partition and oriented along before the stream of compressed air expires by means of an oblique cut of the slit-forming partition.

Figure 1 shows an ejector for dust suppression during ventilation of mine workings; figure 2 - node I in figure 1.

The ejector includes a housing 1, a head 2 with the formation of a ring when connecting them (L

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a chamber 3 and a main annular slot 4, a nozzle 5 for supplying compressed air. An additional annular chamber 6 is made in the head with an annular slot 7, separated from the main chamber 3 by a slit-forming partition 8. Water is supplied through the nozzle 9. Arrow 10 shows the direction of flow of water, 11-air-air mixture, 12 - compressed air.

The ejector works as follows. Compressed air enters the annular chamber 3 through the nozzle 5 and flows out of it through the main annular slot 4 with a supersonic speed in the direction 12.

When water is supplied through the nozzle 9 into the annular cavity 6 of the head 2, it expires in a continuous annular flow 10 through the slot 7, oriented along the flow of compressed air 12 due to the oblique cut of the gap-forming partition 8. The water jet is in contact with a compressed air stream having supersonic speed and breaks up into very small drops of water. In this case, a uniform finely dispersed water-air mixture 11 is formed, providing effective dust suppression in the face of the mine.

The implementation of an additional annular chamber with an annular slit in the head of the ejector and the supply of water in a continuous stream to a stream of compressed air having a supersonic speed will allow, in comparison with the prototype, to increase the efficiency of dust suppression by creating a uniform finely dispersed water-air mixture.

Claims (1)

Formula of the invention An ejector for dust suppression during ventilation of mine workings, comprising a housing, a head attached to it, having an annular chamber with an annular slot, a nozzle for supplying compressed air and water, characterized in that, in order to increase the efficiency of dust suppression by creating a uniform finely dispersed air-water mixture , the ejector is equipped with an annular partition mounted in the head with the formation of an additional annular chamber with an annular gap, while the additional chamber is in communication with tutserom for water supply, and an annular gap of the additional chamber is located at an acute angle to the annular gap of the main chamber in the direction of outflow of a jet of compressed air. / g 3 2222222222 // fig 1 Fig 2