SU1606843A2 - Pneumatic charger for cartridging explosives - Google Patents

Abstract

The invention relates to mining and can be used in the mechanized charging of explosive cavities. The purpose of the invention is to increase the efficiency and reliability of the device by ensuring the safety of the cartridges of explosives transported through the charge hose (Ø). Inside the feeder 1 is placed an ejector 2 with a round 3 and an annular 4 nozzles and a confuser 5. Inside the nozzle 4 an elastic valve is inserted - a nipple 6, and an adapter 7 is attached to the confuser 5, which is divided into three consecutive sections: accelerating 8, ventilating 9 and direction 10. In the etching area 9, perforations are made (P) 11. Place Ø 7 in the hole so that section 10 enters the hole completely. The diameter of Ø 7 in this area is taken such that the gap between the walls of the hole and Ø 7 is as small as possible. The cartridge BB and the feeder 1 are pushed out by compressed air (CB) at W 7 and move through it through sections 8, 9 and 10. After passing by the C chuck VV section 9 CB will expire through P 11, the total area of which is 1.25 - 1.50 cross-sectional area W 7. Under the action of inertial force and residual pressure CB, the cartridge of the explosive moves along section 10 to the bottom. With a uniform distribution of small holes относительно 11 relative to the diameter П 7, the soft shell of the explosive cartridge against the edges of the holes 11. 11 does not break. 1 Il.

Description

The invention relates to mining, can be used in the mechanized charging of explosive cavities, and is in addition to the author. Ev, No. 968393.

The purpose of the invention is to increase the efficiency and reliability of the device by ensuring the safety of the patronized explosives transported through the charge hose.

The drawing shows the proposed device, a general view.

The device consists of a feeder 1, the air of which is placed an ejector 2, including a circular nozzle 3, an annular nozzle 4 and a confuser 5. Inside the nozzle 4, an elastic valve nipple 6 is inserted, and a charging hose 7 is attached to the confuser 5, which is divided into three sections: accelerating 8, bleeding 9, guide 10. In the bleeding section 9, perforations 11 are made to release compressed air; Compressed air is supplied to the charger through an air inlet hose (not shown) through 12.

The device works as follows.

The charging hose 7 is placed in the hole so that the guide section 10 enters the hole completely (while there is no gap between the walls of the hole and the charging hose, since the diameter of the latter corresponds to the diameter of the hole). Bleed section 9 and accelerating 8 must be outside the hole. Later on, when charging, the entire charger with charging hose 7 moves as soon as the EB cartridges are received into the hole to a distance equal to the length of the explosive cartridges. The cartridge BB raises to the beginning of the circular nozzle 3 and supplies compressed air to the device. When compressed air is supplied to the device through nozzle 12, the exit from the annular nozzle 4 of the ejector 3 creates a vacuum in its area, sucking air and the explosive cartridge into the confuser 5 and then into the charging hose 7. After the cartridge B has passed the elastic the valve nipple 6, the pressure in the region of the annular nozzle 4 begins to increase, and the compressed air begins to move toward the elastic valve nipple 6 and slam it. In this case, compressed air acts only on the cartridge BB, accelerating it over the accelerating section 8. Above the cartridge B, overtaking its compressed air does not create resistance in the form of an airlock, as it bleeds through the perforation 11. After passing through the cartridge BB

Section 9, the pressure on the chuck BB is weakened because the compressed air acting on the cartridge chuck is also vented through the perforation 11, and the cartridge chuck, due to inertial forces, moves along the guide section 10 and is thrown into the hole of the hole or previously loaded charge and compacted. The guide portion 11 of the hose 7 is here necessary so that the explosive cartridge does not touch the

the walls of the hole and did not extinguish at the same time the speed of movement or not stuck. After the explosive cartridge 9 passes the bleed section 9, the pressure in the system will drop due to the outflow of compressed air through the perforation 11,

whereby the elastic valve nipple 6 will open and the next explosive cartridge can be sent. Then the cycle repeats. After infection of the hole, the supply of compressed air is stopped, as a charge

Hose 7, you can use a piece of hard pipeline, which is most effective for melkoshkurovoy breaking rock.

Total perforation area 11

equal to 1.25 - 1.50 cross-sectional area of the charge hose 7. At a lower value of the perforation area 11, the main amount of compressed air, which moves the cartridge B, has time to get out of the perforation holes 11,

creates normal conditions for the operation of the ejector 2 and does not further hinder the movement of the cartridge in the guide section 10 before the hole in the hole. And the top perforation area value 11 prevents

excessive over-consumption of air and allows you to save a certain amount of compressed air to push the explosive cartridge into the bore hole.

With a uniform distribution of perforations 11 that are small relative to the diameter of the charge hose 7, the perforations 11 do not break the soft shell of the explosive cartridge against the edges of these openings.

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Claims (1)

Invention Formula Pneumatic charger for patronized explosives according to ed. St. No. 968393, characterized in that, in order to increase its efficiency and reliability in operation by ensuring the safety of the packaged explosives transported along the charging hose, the hose is perforated, and the total perforation area is 1.25 -1.50 cross-sectional area of the charging hose.