Ejector for airing via well

FIELD: mining.

SUBSTANCE: ejector comprises a diffuser, two serially installed receiving heads with receivers connected by a hollow cylinder, with two outlet slots and gaskets each having holes. At the same time the main outlet head is equipped with a confusor receiving nozzle. The last flange of the second receiving head may be an anti-deformation flange.

EFFECT: provision of ejector operation for high aerodynamic resistance.

2 cl, 1 dwg

 

The invention relates to the field of mining industry and can be used for mine ventilation through the hole.

Known ejector [A.S. No. 518569, 03.06.1974, E21F 1/00], including the diffuser, two collector - primary and secondary (two receiving heads), the internal cavity (receivers) which are interconnected through the hollow cylinder, and an annular gap formed by the strips.

The diffuser of the ejector made in the form of straight pipe. It reflected the hope of the authors to use this design as a blower for ventilation through the hole. Scope stated: "the Ejector in combination with a duct may be used to discharge, suction and combined methods of ventilation". The term "well" covered by the term "air duct".

The disadvantage of this ejector as a blower for ventilation through a hole appeared in its benchmark testing on this operation (July 1976, Vestige). Hole in the mountain imitated metal pipe with a diameter of 120 mm and a length of 20 meters Ejector not pumped the air in "the hole" and when running at high aerodynamic resistance was losing the quality of the ejector as it blew in all directions, but not in the "well", although in an open atmosphere and in combination with the rubber the wooden passage of large diameter (200-500 mm) asectional well.

Testing as a blower for ventilation through the well has been another well-known ejector [A.S. No. 918438, 17.09.1980, E21F 1/00]that includes all the main features of ejector [A.S. No. 518569, 03.06.1974, E21F 1/00], but provided with arcuate flow regulator compressed air.

The lack of ejector [A.S. No. 918438, 17.09.1980, E21F 1/00] the same under any provisions of the regulator to overcome the resistance of the "wells" failed (summer 1982, Vestige).

Object of the present invention is to provide ejector able to ventilate through the hole.

This is achieved by the fact that the ejector supply confusionem adoptive pipe, which is installed between the receiving head (between the collectors). The length of the intake pipe is determined experimentally, however, it should not exceed the distance between the receiving openings.

The cause of the negative result when testing ejector [A.S. No. 518569, 03.06.1974, E21F 1/00] and [A.S. No. 918438, 17.09.1980, E21F 1/00] - no straight or confused inlet pipe between the headers. In the absence of the receiving socket is created open communication between the entraining stream of the first manifold and the surrounding atmosphere, that when working on a large aerodynamic resistance leads to the loss of aerodynamic stability of the jet. In the presence of the receiving pipe EOL is chiruwa stream of the first collector does not lose stability, and the ejector is capable of feeding air through a hole with a diameter of 120 mm and a length of from 30 to 80 m with a flow rate of from 70 to 60 m3/min

In the drawing, figure 1, shows a section of the proposed ejector. The ejector includes a diffuser 1, toroidal receivers 2, 3, 4, 5, educated shaped flanges 6, 7, 8, 9, 10, 11, annular gap 12, 13, 14, 15 formed by the strips 16, 17, 18, 19. Bolting flanges 6, 7, 8, 9, 10, 11 between them, through the gasket with the holes form two receiving heads. Foster head rigidly connect the hollow cylinder 20. A supply of compressed air is produced through the nozzle 21. The rigidity of the connection receiving heads provide additional hollow cylinder 22, is placed between the flanges 8 and 9 by means of through the clamping bolt 23. The flanges 7 and 10 contain eight through holes for connection of the receivers 2 and 3, 4 and 5, which ensures the unity of compressed air for both receiving heads. The flanges 24 and 25 provide a welding attachment of the diffuser 1 and confused inlet pipe 26. The flange 11 has an enlarged external size and simultaneously serves as protivodetonatsionnuyu the flange.

The ejector operates as follows. Compressed air, dripping from the receivers via the annular gap, around the convex surface of the flange and is directed along the inner surfaces confused as the receiving pipe, the same cone. While in the inner regions of the two receiving heads occurs, the vacuum and atmospheric air is drawn through the neckline of the head and enjoys in cocurrent with the entraining wall jets over. In confused the receiving pipe there is a radial component of velocity directed to the flow axis, resulting in mixing and ejecting the ejected jets and the desire to be aligned with the overall plot of the velocity, which increases its aerodynamic stability at a fairly short distance. Outward flowing in the neck of the second receiving head, this jet, somewhat increasing the entraining action of this head, rapidly enters the diffuser, almost without contact with the outside atmosphere. In the prototype [A.S. No. 518569, 03.06.1974, E21F 1/00] and analogue of [A.S. No. 918438, 17.09.1980, E21F 1/00] this stream in the diffuser misses, and expires in the atmosphere, when the end of the diffuser is inserted into a long pipe.

The proposed ejector in combination with the method of ventilation long stub burndown application No. 2009106490/03 (008697) from 24.02.2009 by the RF patent for the invention "Method of ventilation long stub generation" can be used as a source of thrust for air flow through the main bore of the adjacent framing in a deadlock.

1. Ejector for ventilation through the borehole, including the diffuser, two consistently set the military adoptive head with receivers, United as a hollow cylinder, with two exhaust slots and strips with holes each, characterized in that the main discharge head provided with a confused receiver socket.

2. The ejector according to claim 1, characterized in that last second flange receiving head is protivodetonatsionnuyu the flange.



 

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