Pneumatic explosive charging spray head for upward medium-length hole

Abstract

The invention relates to a pneumatic explosive charging spray head for an upward medium-length hole. The pneumatic explosive charging spray head has the technical scheme that the pneumatic explosive charging spray head is structurally characterized in that the right end of a rotor (1) is connected with an inner ring of a bearing connecting ring (2); the left end of an outer ring of a bearing (3) is connected with an outer ring of the bearing connecting ring (2); the bearing (3) is arranged at the left end of a connector (4). Three passages (6) in twisted distribution by using the axial line of the rotor (1) as the center are arranged inside the rotor (1); the center line of each passage (6) is a cylindrical spiral line; the right end of the rotor (1) is inwards provided with a conical cavity (5); the bottom surface of the conical cavity (5) is coincident with the right end surface of the rotor (1). Straight flow explosives passing through a connector are converted into rotational flow explosives around the passage wall direction by the spiral passages (6), so that the explosives do rotational motion in explosive charging holes to form explosive rotational flow; the explosives can be stably, uniformly and compactly charged and filled along the explosive charging holes. The pneumatic explosive charging spray head has the characteristics that the use is convenient; the charging and filling density is high; the explosive charging powder return rate can be effectively reduced; the work environment is protected.

Description

technical field [0001] The invention belongs to the technical field of pneumatic charging devices. In particular, it relates to a pneumatic charge spray head used for upward-to-medium-deep holes. Background technique [0002] At present, due to the ore body occurrence conditions and the needs of mining technology in underground mines, more and more blasting operations are carried out in upward medium and deep holes. However, in the process of upward charging of explosives, the distribution of explosives is often caused by the gravity of the explosives themselves. It is uniform, not dense, and even partially forms an empty area, which has a great adverse effect on the blasting effect. And because the explosive is directly loaded by the air pressure through the drug delivery hose, the return air mixed in the explosive will have a reverse impact on the loaded explosive in the blast hole, causing the explosive to travel along the charging pipe and the wall of the charging hole....

AI Technical Summary

Problems solved by technology

[0002] At present, in underground mines, due to the conditions of the ore body and the needs of the mining process, more and more upward blasting operations are carried out in the middle and deep holes. However, in the process of upward loading of explosives, the explosive distribution is often caused by the gravity of the explosive itself. Uniform, not dense, and even partially formed voids, which have a great adverse effect on the blasting effect

And because the explosives are directly loaded by the air pressure through the drug delivery hose, the return air mixed in the explosives will form a counter-impact effect on the loaded explosives in the blast hole, causing the explosives to flow along the gap between the drug delivery tube and the charging hole wall. A large number of gaps between the holes leak downward, which not only reduces the filling quality of medium and deep hole explosives, affects the blasting effect, causes a high rate of explosive powder return, but also pollutes the working environment

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