SU1244067A1 - Feeder of pneumatic transportation installation for loose materials - Google Patents

Description

This invention relates to pneumatic conveying, namely to feeders for bulk materials.

A known feeder of a pneumatic conveying installation for bulk materials, comprising a hopper with a discharge opening in the bottom and a vertical nozzle mounted above it, connected to a compressed air supply nozzle, and a device for adjusting the flow of the material to be discharged.

However, the known feeder is energy intensive and not reliable enough.

The purpose of the invention is to reduce energy intensity and increase reliability.

The goal is achieved by the fact that

in the feeder of the pneumatic conveying installation 15 ki under the longitudinal slot 11 to the bottom

for bulk materials, containing a hopper with an exhaust hole in the bottom and a vertical nozzle mounted above it, connected to the compressed air supply nozzle, and a device for adjusting the flow of the discharged material, the latter contains a cylinder rigidly attached to the bottom of the bunker concentric to the nozzle to the bottom of the hopper and made with hole on the side, a conical cover mounted on the qi20

the end face of the glass 9 is greater than the height of the passage of material between the lower end of the cylinder 5 and the bottom of the hopper 1.

The cover 8 relative to the cylinder 5 is locked in a known manner, for example with a screw.

The nozzle 3 with the cylinder 5 is fixed via a gas supply nozzle 4.

The part of the nozzle 3, entering into the blind hole 10 of the bottom of the glass 9 for a length more

a linder with the possibility of adjusting their 25 stroke of the lid 8 (in the position in FIG. 1),

relative position, and the cup placed in the cylinder bottom upward and made with a deaf cylindrical axial hole in it and a longitudinal slot in the side wall and mounted movably relative to the cylinder, and the spout supply pipe of that air is perpendicular to the nozzle and placed in the said slot glass and rigidly fixed in the side opening of the cylinder.

FIG. 1 shows the feeder, a general view; in fig. 2 shows section A-A in FIG. 1. 35

The feeder contains a hopper 1 with a discharge opening 2 in the bottom and a vertical nozzle 3 connected to the nozzle 4 of the compressed air supply, a cylinder 5 rigidly attached to the supports 6 to the bottom of the bunker 1, and with a hole 7 on the side, a conical lid 8, a cup 9, the bottom of which is made a blind cylindrical hole 10, and a slit 11 is longitudinal in the side wall.

When lifting, the cup 9 abuts against the lid 8, when lowering - into the bottom of the hopper 1 45 or into the mass of material pressed against the bunker 1.

The lowering of the glass 9 without an emphasis into the nozzle 3 is achieved at the height of the bottom of the glass 9 above the end of the nozzle 3 more than the stroke length of the glass 9.

The lower end of the glass 9 is located 50 relative to the bottom of the bunker 1 at a height equal to the minimum allowable width of the material passage, in which there is no arching for a given particle size of material granules.

prevents the descent of the glass 9 from the nozzle 6 at its greatest lift.

The cylinder 5 is fixedly mounted above the bottom of the hopper 1, for example, by means of supports 6.

The feeder works as follows.

In the absence of gas pressure in the nozzle 3, the beaker 9 is in the lower position, at the bottom of the hopper.

The cylinder 5 in the hopper 1 is filled up with material for transportation. Gas is supplied to the nozzle 3 through the nozzle 4.

When the gas pressure is less than the working cylinder 5 is closed by the glass 9. At this time, the force of the gas pressure on the bottom of the blind hole 10 of the glass 9 is less than the weight of the glass 9.

Upon reaching the workplace, the force of gas pressure on the area of the orifice 10, overcoming the weight of glass 9 and the resistance of friction of material to glass 9, lifts it and opens cylinder 5 for operation. The material enters the cylinder 5 between the supports of the 6 m. Of the castle at an angle of repose.

The medium, which is not obscure, is forced out by the glass 9 from under the cover 8 through a sufficiently small gap between the cylinder 5 and the glass 9, absorbs the shock of the glass 9.

In order to stop the operation, the gas pressure is reduced to a pressure that is minimal, but still sufficient for uncontrolled transportation (i.e., when the velocity in the pipeline is still sufficient so that the material does not fall out of the flow onto the walls due to gravity). In this mode

The lower end of the cylinder 5, the workout cup 9 is positioned, the overcoming force is pressure-relative to the bottom of the bunker 1 at a height of no more gas in the nozzle 3, under its own weight of the greatest stroke of the bowl 9 (the sum of the height is lowered and clamps the material at the entrance to

lifting the cup 9 from the bottom of the hopper 1 to the position of the stop in the cover 8 and the stroke of the cover 8 along the threads of the cylinder 5.

In the side wall of the beaker 9 there is a slot 11 for bypassing the nozzle 4 with a glass. Moving the nozzle 9 without an abutment into the nozzle 4 is provided by the conditions: the length of the longitudinal slot 11 under the nozzle 4 (in the position in Fig. 1) is longer than the stroke of the cover 8 along the thread of the cylinder 5 , and under the pipe 4 is greater than the maximum stroke of the glass 9.

When lowering the glass 9 does not completely exit the wall from the cylinder 5. For the glass to completely overlap the passage of material under the lower end of the cylinder 5, the height of the wall under the longitudinal slot 11 to the lower

the end face of the glass 9 is greater than the height of the passage of material between the lower end of the cylinder 5 and the bottom of the hopper 1.

The cover 8 relative to the cylinder 5 is locked in a known manner, for example with a screw.

The nozzle 3 with the cylinder 5 is fixed via a gas supply nozzle 4.

The part of the nozzle 3, entering into the blind hole 10 of the bottom of the glass 9 for a length more

the stroke of the cover 8 (in position in Fig. 1),

prevents the descent of the glass 9 from the nozzle 6 at its greatest lift.

The cylinder 5 is fixedly mounted above the bottom of the hopper 1, for example, by means of supports 6.

The feeder works as follows.

In the absence of gas pressure in the nozzle 3, the beaker 9 is in the lower position, at the bottom of the hopper.

The cylinder 5 in the hopper 1 is filled up with material for transportation. Gas is supplied to the nozzle 3 through the nozzle 4.

When the gas pressure is less than the working cylinder 5 is closed by the glass 9. At this time, the force of the gas pressure on the bottom of the blind hole 10 of the glass 9 is less than the weight of the glass 9.

Upon reaching the workplace, the force of gas pressure on the area of the orifice 10, overcoming the weight of glass 9 and the resistance of friction of material to glass 9, lifts it and opens cylinder 5 for operation. The material enters the cylinder 5 between the supports of the 6 m. Of the castle at an angle of repose.

The medium, which is not obscure, is forced out by the glass 9 from under the cover 8 through a sufficiently small gap between the cylinder 5 and the glass 9, absorbs the shock of the glass 9.

In order to stop the operation, the gas pressure is reduced to a pressure that is minimal, but still sufficient for uncontrolled transportation (i.e., when the velocity in the pipeline is still sufficient so that the material does not fall out of the flow onto the walls due to gravity). In this mode

operation of the cup 9, overcoming the pressure force of the gas in the nozzle 3, lowers under its own weight and clamps the material at the entrance to the

cylinder 5, stopping the flow of material. The position of the bottom end of the glass at this moment is shown in FIG. 1 by a dot-dash line. The jet of the nozzle 3 removes residual material from the pipeline, after which the gas supply is stopped.

If the end of the work occurs after the emptying of the hopper, 1 canister 9 is lowered to the bottom of the bunker 1 or to the pellets remaining at the bottom.

The material is re-filled. The slots and glass passages 9 between the granules are filled up with material.

The optimum height for opening the flow area to enter the material into the cylinder under the glass 9 is established by moving the cap 8 along the threads of the cylinder 5, after which the cap 8 is locked.

The feeder can reduce power consumption and increase reliability.

FIG. 2

Claims (1)

FEEDER OF AN AIR-TRANSPORT INSTALLATION FOR BULK MATERIALS, containing a hopper with an unloading hole in the bottom and a vertical nozzle mounted above it, connected to a compressed air supply pipe, and a device for adjusting the flow of unloaded material, characterized in that, in order to reduce energy intensity and increase the reliability of operation , the device for adjusting the flow of discharged material contains a cylinder rigidly attached to the bottom of the hopper concentrically to the nozzle and made with an opening on the side, a conical roof a flap mounted on the cylinder with the possibility of adjusting their relative position, and a glass placed upside down in the cylinder and made with a blind cylindrical axial hole in it and a longitudinal slot in the side wall and mounted movably relative to the cylinder, and the compressed air supply pipe is connected to the nozzle perpendicularly placed in the slot of the glass and rigidly fixed in the side hole of the cylinder. figure 1 (!) 1244067 A1