RU1782885C - Bulk material pneumatic feed device - Google Patents

Abstract

Usage: the invention relates to pneumatic transport of easily moving bulk materials and can be used in mechanical engineering, in foundry, fuel supply of CHP, chemical industry. SUMMARY OF THE INVENTION: A perforated drive element is installed in the mixing chamber with the possibility of blocking the chamber outlet. The drive of the perforated element is connected to the valve drive of the gas supply pipe at the initial section of the transport pipeline. A perforated cup-shaped element picks up a portion of the aerated material in the chamber and, pressing against the outlet of the chamber, directs this batch to the transport pipeline, thereby achieving material flow. 1 s P. f-ly, 2 ill.

Description

The invention relates to pneumatic transport of easily moving bulk materials and can be used in mechanical engineering, foundry, fuel supply of thermal power plants, and the chemical industry.

A known azration feeder comprising a housing divided by an air distribution grill into an air and displacement chamber, and a control valve mounted on the discharge port 1.

The disadvantages of this feeder are:

low technical productivity due to the low bulk density of the aerated material and the operation of the feeder in the mode of movement of the moving material with a constant concentration, the complexity of the dosage of aeration material.

The closest in technical essence and the achieved result to the proposed one is a device for pneumatic feeding of bulk material 2, comprising a mixing chamber with an upper loading and side discharge nozzles, an aerodynamic plate mounted in the chamber with the formation of two cavities in it, the lower of which is connected to the compressed source gas, and installed in the mixing chamber above the xX aerodynamic

with

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CD 00 CJ

main with the inlet of the discharge pipe with the possibility of axial movement of the rod with a locking element at its end.

The disadvantage of this device is the limited productivity due to blockages in the area of the discharge pipe, since the design of the locking element limits the ability to capture fluidized material, the portability of the conveyed material is not ensured, which significantly affects the productivity of the device, and the scope of the transported material is narrowed .

An object of the invention is to expand technological capabilities by providing a batch feed.

This goal is achieved in that in a device for pneumatic supply of bulk material containing a mixing chamber with an upper loading and side discharge nozzles, an aerodynamic cup mounted in the chamber with the formation of two cavities in it, the lower of which is connected to the source of compressed gas and installed in the mixing axially displaceable above the aerodynamic chamber with an inlet of the discharge port with axial movement, the rod with a locking element at its end, according to the invention, a locking element before Tavlya is a spherical bowl-perforated elastic material, hinged on its convex side of the rod and configured to cover the end face of its inlet opening of the discharge pipe. The goal is also achieved by the fact that the discharge pipe at its inlet end is made with a confuser.

The design of the closure element of elastic material in the form of a spherical perforated bowl allows the dosing of the aerated material supplied to the discharge port.

The presence of openings in the bowl allows maintaining a stable pressure in the discharge pipe and the main pipeline, which ensures the movement of portions of aerated bulk material at a constant speed and prevents them from spreading out of the bowl.

Hinging the bowl with its convex side on the rod and performing with the possibility of covering the inlet opening of the discharge pipe with its end face, it eliminates the possibility of jamming and

to ensure the directed movement of a portion of the material into the discharge pipe.

The execution of the bowl (locking element) axially movable allows you to adjust the magnitude of the strokes and the frequency of strokes.

The installation of an air valve on the discharge pipe eliminates the reverse movement of aerated material during the idle period of the bowl.

0 The implementation of the inlet end of the discharge pipe with a confuser allows to increase the speed of movement of the air mixture at the site of its entry into the main pipeline. The combination of all these characteristics

5 allows to achieve the goal,

Since the features of the proposed device are absent in the known technical solutions, we can conclude that

0 the proposed device for pneumatic supply of bulk material meets the criteria of the invention, significant differences.

In FIG. shows a general view of the proposed device; in FIG. 2 is a longitudinal section of a locking element of the bowl and the inlet end of the discharge pipe.

A device for pneumatic feeding of bulk material contains, a mixing chamber 1 with an upper loading nozzle 2 and with a side discharge nozzle 3, an aerodynamic plate 4 forming two cavities in the chamber, the lower 5 communicates with a source of compressed gas 6, a rod 7 with a shut-off element 8 on its end is connected to the piston of the hydraulic cylinder 9, an air valve 10 on the discharge pipe 3, controlled by a pneumatic cylinder 11, a reversing valve 12.

0 A device for pneumatic supply of bulk material operates as follows.

The material is fed into the mixing chamber 1 through the loading nozzle 2 and at the same time aerated with gas entering the mixing chamber 1 from the source of compressed gas 6. Under the action of the compressed gas, the bulk powder material passes into the fluidized state and occupies the entire volume of the mixing chamber 1.

In the initial position, the locking element - the bowl 8 is removed from the inlet of the discharge pipe 3 and the valve 10

5 open. The pressure in the discharge pipe 3 is equal to the pressure in the mixing chamber 1 and the lower cavity of the chamber 5.

When you turn on the reversible spool 12, the compressed gas enters the piston cavity of the pneumatic cylinders 9 and 11, the pistons

which are actuated by a locking element - a bowl 8 and a valve 10. The bowl 8 starts moving towards the inlet of the discharge pipe 3, while capturing a portion of aerated powder material, and the valve 10 cuts off the gas flow into the discharge pipe 3.

In this case, the pressure in the discharge pipe 3 drops and a portion of the aerated material captured by the bowl 8 is fed through the discharge pipe further into the transport line. The cup 8 closes the inlet of the discharge port 3. When the reversing spool 12 is switched, the pistons of the pneumatic cylinders move in the opposite direction, and therefore, the cup 8 and the valve 10 return to their original position.

The proposed device for pneumatic feeding of bulk material allows to achieve a transportation capacity of 20-25 t / h.

The use of the proposed device for pneumatic feeding of bulk material in comparison with the prototype reduces energy consumption by 25% by reducing

Claims (2)

1. A device for pneumatic supply of bulk material containing a mixing chamber with an upper loading and side discharge nozzles, an aerodynamic plate mounted in the chamber with the formation of two cavities in it, the lower of which is connected to the source of compressed gas, and installed in the mixing chamber above the aerodynamic coaxial inlet the opening of the discharge pipe with the possibility of axial movement of the rod with a locking element at its end, characterized in that, in order to expand technological capabilities by providing and feeding the batch material, the locking member is a spherical perforated cup of elastic material, hinged on its convex side of the rod and configured to cover the end face of its inlet opening of the discharge pipe. 2. The device according to claim 1, characterized in that the discharge pipe at its inlet end is made with a confuser.