SU537009A1 - Pnevmovopinovaya pump for injection pneumatic conveying installations - Google Patents

Description

one

This invention relates to the pneumatic transport of bulk materials, such as flour, cement, calcified soda.

Known pneumatic screw pump for pneumatic conveying installations, containing the receiving and mixing chambers, interconnected by a pipe, inside which is a screw. At the end of the pipe in front of the mixing chamber is a check valve I.

In this pneumatic screw pump, material is pressed by the screw, which leads to rapid wear of the screw and pipe, as well as to an increase in air pressure in the material pipe of the installation.

Loosening of the compressed material in the mixing chamber occurs with the help of a rotating disk with holes for the passage of compressed air, on which the vertical ribs are radially fixed. The disk is mounted above the porous bottom of the mixing chamber. Loosening the material with the help; and the disk requires additional energy costs.

Known pneumatic screw pump for pneumatic conveying installations, containing the receiving and mixing chambers, interconnected by a pipe, inside which is a screw, having a hollow shaft connected to a source of compressed air, at the end of which from the side of the mixing

camera mounted nozzle for compressed air supply 2.

In this pneumatic screw pump, the material is pressed in and the air is supplied in two directions: through the hollow screw shaft into the rotating slotted nozzle and along the periphery of the mixing chamber in the direction of material flow. However, the rotating slotted nozzle does not

ensures good loosening of the material and its saturation with air.

When the ambient air humidity changes, many materials, such as flour, when fed with a pneumatic screw pump, are lumped together. The air escaping from the rotating slotted nozzle and the end of the mixing chamber is not in a state to loosen these clods, and they move in a rotating air flow into the plumbing. This leads to the loss of material into the pipeline and its subsequent blockage, which creates an emergency situation and reduces the performance of the pneumatic conveying installation. The purpose of the invention is to improve the loosening of the bulk material fed to the mixing chamber.

To do this, in the proposed pump, the nozzle is made in the form of a hollow truncated cone plugged from the end of the smaller base, and

It has holes on its lateral surface located along multiple spiral lines.

FIG. 1 shows schematically the described pneumatic screw pump in section; in fig. 2 - nozzle with holes of circular cross section; in fig. 3 - the same, with holes in the form of a groove.

Air pump contains a receiving

The mixing chamber 2 is connected by a pipe 3. Inside the pipe 3 there is a screw 4, a hollow shaft 5 of which is installed in the bearing housing 6. Between the bearing housing 6 and the camera 1 there is a pneumatic chamber 7 through which the shaft 5 passes. In the area of the pneumatic chamber 7 the surfaces of the hollow shaft are made through holes 8 through which compressed air is supplied to the inside of the shaft. The tightness of the chamber 7 is provided by sealing the shaft with gland seals 9. Compressed air into the chamber 7 is supplied through the fitting 10. At the end of the shaft 5, from the side of the chamber 2 a nozzle 11 is mounted for supplying compressed air, made in the form of a hollow truncated cone plugged from the end of the smaller base . Nozzle

I1 has holes on its side surface, located along multiple spiral lines and made either of circular section 12 or in the form of a groove 13. The shape of the holes depends on the physical and mechanical properties of the bulk material. Chamber 2 has a housing 14 with a fitting 15 for supplying compressed air and a porous shell 16. A material line 17 is attached to the mixing chamber in the transport direction.

The pressure in the chamber 7, in the pipe 3, in the housing 14 of the mixing chamber and in the material pipe 17 is controlled using pressure gauges 18. A pneumatic pump is mounted on the frame 19.

Pneumatic pump works as follows.

The bulk material to be pneumatically transported is loaded into the receiving chamber 1, from where auger 4 is fed into the chamber 2.

Simultaneously with the loading of the material, compressed air is supplied through the nozzle 10 into the chamber 7 and through the nozzle 15 into the body 14 of the chamber 2. From the chamber 7, the compressed air through the holes 8 through the shaft 5 of the screw 4 enters the nozzle 11, and from the body 14 through the shell 16 camera 2.

In the mixing chamber, compressed air streams emanating from the openings of the nozzle 11, located along multiple helical lines, and the air entering chamber 2 through the shell 16, the material is carefully loosened, saturated with air. There is a turbulence of the material mixture. From the chamber 2, the air-material mixture enters the pipeline 17.

Claims (2)

1.Avt. St. No. 260498, cl. In 65G 53/08, 1965. 2. The patent of Germany No. 1169370, cl. 81 e, 63, 1964. nineteen 13