SU1344707A1 - Device for pneumatic transportation of loose material - Google Patents

Abstract

This invention relates to the pneumatic transportation of bulk materials through pipelines. The purpose of the invention is to increase reliability in operation. The device consists of a hopper 1 with an outlet 2, a mixing chamber 5 with a partition 9, forming a cavity 10 adjacent to the outlet 2. The chamber 5 is connected with the transport pipe 7 by its upper part. The vertical axis of the cavity 10 is displaced relative to the axis of the transport pipeline towards the wall of the hopper 1. In the lower part of the cavity 10 through the pipe 8 summed up compressed air. In the partition 9, holes 11 are made, covered with additional covers, which are connected by nozzles to the atmosphere. The partition 9 is installed with a gap relative to the bottom of the chamber 5, and the cross-sectional area of the cavity 10 partially overlaps the area of the inlet section 6 of the transport pipeline 7. The device works as follows: the material flows from the hopper 1 into the cavity 10 and is picked up by the air flow coming from the atmosphere through the pipes, due to the discharge generated in the transport pipeline 7. Then the material is transported through the pipeline 7. After the discharge in the pipeline 7 is removed, the transportation is stopped, the material from the hopper fills the cavity 10, and the material remaining in the transport pipeline is poured into the mixing chamber 5. Before the next transport cycle begins, the cavity 10 is blown by compressed air through the nozzle 8. The material from the mixing chamber 5 through the gap between the partition 9 and the bottom of the chamber 5 enters the cavity 10 and is blown into the transport pipeline 7. After the mixing chamber 5 is freed from the material, the material from the hopper is transported by discharge to the pipeline 7. 1 3. Fillet, 2 Il. o Sg (L with N of FIG.

Description

The invention relates to the pneumatic conveying of bulk materials and can be used, for example, for transporting metal shot (sand) in shot-blasting apparatuses of the suction type.

The purpose of the invention is to increase the reliability of work.

FIG. 1 shows a device for the pneumatic transportation of bulk material; in fig. 2 shows section A-A in FIG. one.

The device consists of a feed hopper 1 with an outlet 2, blocked by a valve 3, a casing 4, tightly enclosing the wall of the bunker 1 in the area of the outlet 2. There is a mixing chamber 5 located between the casing 4 and the wall of the bunker 1 The chamber 5 communicates in the upper part with the inlet section 6 transport pipeline 7, and in the lower part, through the pipe 8, with a source of compressed air. In the mixing chamber 5 with a gap relative to its bottom, a partition 9 is mounted, forming a cavity 10 adjacent to the outlet 2. The vertical axis of the cavity 10 is displaced relative to the axis of the transport pipeline 7 towards the wall of the hopper 1, while the cross-sectional area of the cavity 10 partially overlaps the area of the transverse sections of the inlet section 6 of the transport pipeline 7. In the partition 9 there are through holes 11, covered with additional covers 12. Cavities between the partition 9 and additional covers 12 communicated with the atmosphere through the nozzles 13. The nozzle 8 posts the mixing chamber 5 with a source of compressed air brought into the cavity 10.

The device works as follows.

The material from the hopper 1 through the outlet 2 enters the cavity 10 of the mixing chamber 5, where it is picked up by the air flow sucked into the cavity 10 through the nozzles 13 from the atmosphere due to the discharge generated in the transport pipeline 7.

Upon completion of transportation and the absence of discharge in the pipeline 7, the material continues to flow from the hopper 1 and fills the cavity 10, while the mixing chamber 5 remains free. The material remaining in the transport pipeline 7 is poured into the mixing chamber 5, due to the displacement of the axes of the cavity 10 and the transport pipeline 7, freeing the entrance section 6 of the pipeline 8. Chamber volume 5

it is chosen sufficient to accommodate all the material flowing out of the pipeline 7.

At the beginning of the recycle in the cavity 10

compressed air is supplied through nozzle 8, the transport pipeline is purged. The material from the mixing chamber 5 due to the gap between the partition 9 and the bottom of the chamber enters the cavity 10 and further along with the material from

The bunker 1 is transported through the pipeline 7. The amount of material supplied from the bunker 1 is controlled by moving the valve 3. The uniformity of air intake from the atmosphere through the pipes 13 is ensured by the presence of additional housings 12 on the partition 9 and the misalignment of the holes 11 of the partition 9 and the holes of the pipes 13.

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Claims (2)

1. Device for pneumatic transportation of bulk material, containing a feed hopper with an outlet, a valve installed in it, 5 and a casing tightly covering the wall of the hopper in the area of the outlet with formation of a mixing chamber between the casing and the wall of the hopper, communicated in the lower part by air inlet - connecting pipe with a source of compressed air, and in the upper part with a transport pipeline, characterized in that, in order to increase reliability, it is equipped with a partition, mounted bathroom in a mixing chamber with. a gap relative to its bottom with the formation in the mixing chamber of a cavity adjacent to the outlet of the bunker, with a cross section partially overlapping the cross section of the inlet section of the transport pipeline, while the vertical axis of the said cavity is shifted relative to the vertical axis of the transport pipeline to the side of the bunker, and an air inlet nozzle is inserted into said cavity. 2. The device according to claim 1, characterized in With that, through holes are made in the partition, and the device is equipped with additional covers with nozzles mounted on the partition and covering the portions of the partition adjacent to the openings, with additional nozzles 0 covers are communicated by one ends with cavities between the partition and the walls of additional covers, and the others with atmosphere. 73 Phi2.2