SU78307A1 - Pneumatic screw pump - Google Patents

Description

The invention relates to a pneumatic screw pump for - transporting pulverized material, in particular alabaster, suspended in air. The pump is equipped with a screw feeder in the form of a hopper and auger with gradually increasing size of the blades for feeding pulverized material into the spray chamber.

A feature of the proposed pump is the combination of a gate valve installed in the feed hole of the hopper with a screw with a gradually increasing blade height. This makes it possible to adjust the performance of the pump and simplifies the design of the feeder without diminishing its efficiency.

FIG. 1 shows a side view of a pneumatic screw pump; in fig. 2 - view from above; in fig. 3 is an end view; in fig. 4 is a longitudinal vertical section; in fig. 5 is a longitudinal horizontal section.

The pneumatic screw pump consists of a seal chamber /, mixing chamber 2 and a hopper 3. The drive from the electric motor 4 to the actual feeder is carried out through a tecropic gear 5. The electric motor, switch and the gear are protected by a guard 6. For ease of movement the feeder is placed on two wheels 8 and provided with a handle 7

From the hopper 3, the transported material (alabaster) enters the pallet 0, where it is caught by the loading coils 9 of the screw (auger) // and enters the compression chamber.

In order to regulate the supply of material in the feed hole of the hopper 3, a valve is installed, covering part of the propeller blades (auger) 11.

The loading part of the screw has a variable height of the blades, increasing as the material moves. At the same time, the outer diameter of the blades is constant, and the inner diameter changes in accordance with the thickening of the auger shaft to the beginning of the screw.

In the compression chamber 1, the transported material is moved from the zone under atmospheric pressure in the hopper to the zone under pressure of compressed air in the mixing chamber and the pipeline. This movement is carried out in the sleeve 12 by the working turns of the screw (screw) //. Thanks to the variable, gradually

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In the course of material movement, the pitch of the coils and the presence of a check valve 13, the material is compacted to prevent the entry of compressed air from the mixing chamber into the hopper.

The valve 13 is opened under the pressure of material on it and during the operation it is balanced by the pressure of the spring M and the compressed air in the mixing chamber 2. The spring is adjusted by screwing in the nozzle 15.

In the mixing chamber 2, the streams of compressed air supplied by the nozzle 16 break the transported material, which in a suspended state is carried along the pipeline to the place of consumption. The compressed air is supplied to the mixing chamber through the pipe 17.

A screw (auger) 11 with its socket in the boot part fits spindle 18, ending with a cone with a shank. The screw is removed from the spindle with

wedge, insert; wow into a specially-made nest ..

The spindle rotates in two ball pods 19 and 20, one of which (19) is radial-thrust. The shafts are protected by oil seals 2L

Subject invention

1. Pneumatic screw pump equipped with a screw feeder. A hopper and a screw with gradually increasing in height honeycomb blades for feeding powdered material into the spraying chamber, differing in that, to regulate the material supply in the feed hole of the hopper, a valve is installed to block a part of the screw blades (screw).

2. The form of execution in p. 1, characterized in that in order to change the height of the blades of the screw under the feed hole of the hopper, the screw shaft has a gradual thickening towards the beginning of the screw.

eight,

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FIG. 2