SU774950A1 - Loose material feeder - Google Patents

Description

one

The invention relates to the building materials industry and, in particular, to devices for the continuous supply of bulk materials.

A device for metering J bulk materials is known, comprising a hopper with a flap and a lever system. The closest solution to the invention is a bulk material feeder containing a hopper mounted above the conveyor, mounted for vertical movement on the lever suspension, sealing the tool. with the weights and 15 mounted in the wall of the hopper gate valve mounted on the end of the lever arm 2.

The disadvantage of these devices is the low accuracy of the automatic control of the flow rate of bulk material with varying density.

The purpose of the invention is to improve the accuracy of automatic control of the flow of bulk material with a change in density.

This goal is achieved by the fact that the feeder for bulk materials, containing a hopper placed above the conveyor, is installed with the possibility of 30

the vertical movement on the lever suspension, sealing the working body with the load and mounted in the wall of the bunker with a spherical damper attached to the end of the lever of the lever suspension, provided with an additional slide valve mounted in front of the sealing working organ at the free end of the lever and the ratio of the length of the lever arm with a gate valve placed over the working body, to the arm length of the lever with a gate valve placed in the wall of the hopper is 1.3-1.5 values The ratio of the densities of bulk and compacted material. The sealing working body can be made in the form of an additional driving belt conveyor with a mechanism for changing its angle of inclination to the main conveyor .;

FIG. 1 shows the feeder, a general view; in fig. 2 - sealing the working body in the form of a drive belt conveyor.

The feeder contains a hopper 2 placed above the conveyor, the 1st working body 4 is mounted vertically on the hanger suspension 3, and the working body 4 is mounted with a primer 5 and mounted in the wall of the hopper 2 by a gate valve 6 fixed to the end of the lever of the lever suspension. The feeder is provided with an additional gate valve 1, mounted in front of the sealing working body 4 at the free end of the lever, and the working body is placed in the hopper, and the ratio of the length of the lever arm with the gate valve to the length of the lever arm with the gate valve, placed in the wall of the hopper, equal to 1.3-1.5 values of the density ratio of the bulk and compacted material. The feeder also has a pressing conveyor 8. The sealing working body 4 can be made as an additional driving belt conveyor 9 with a mechanism 10 for changing its angle of inclination to the main conveyor 1, and the rotational drive is made as a depot 11.

The choice of lever lengths is determined from the ratios

(ABOUT

 (1.3 - 1, 5) A.h

.upe

  (2).

derived from the following considerations.

To obtain plates of constant density f and thickness h, bulk material with a constant mass flow rate G fj bj b V must be fed to conveyor 1, (3)

where f, is the density of the plate, kg / m; h is the plate thickness, m; b - width / 1LITES, m; V is the exit velocity of pressed plates, m / s.

From under the working body (roller) 4 comes a compacted mixture with a constant density h, the value of which is regulated by means of load 5. The compacted mixture is filled with a mixture from a hopper with a density of (up to a height h above the surface of the conveyor 1.

To ensure equality (G), it is necessary to sustain heights in accordance with equality (4)

  . Ta, E-Tr (S

where is equality from (2)

l h db.

(2) 2 willows. , mr

Equality 1) is determined experimentally from the compaction conditions of the loose mixture. For mixtures with bulk bulk weight up to 100-200 kg / m, dependence (1) is selected

lN (1.3 - 1.5) l. (one)

Powered feeder as follows.

The conveyor belt 1 moving with side walls carries the bulk material from the hopper 2. The height of the mixture layer h is limited by the slide valve 7. The mixture is compacted by the rotating roller 4 to the height h

On compacted mixture

LLPe. The weight of the bunker is filled from the hopper 2

to height h-i, limited by sllo-rmop valve 6. The mass of the material is pressed by means of conveyor 8 to the height of plates h.

With an increase in the density of the bulk IO material in the hopper 2 (a change may occur as a result of a change in the process prepared and the mixture, —P the result of self-sealing), under roller 4, a mass with a density of

nominal, and height h.

l

The height of the compacted mass increases, the roller 4 at the same time goes down and rotates the lever 3, which, in MESSAGE, lowers the gate valves 7 and 6 to the heights specified in Formulas (1) and (2). A mass with a reduced height will pass from the bunker and, accordingly, the bleeding will be reduced.

p The operation of the feeder when using the sealing body, made in the form of a belt conveyor, is analogous to the work with the roller.

 The belt conveyor 9 is set at a certain angle (the magnitude of which is determined experimentally) with the aid of the mechanism 10 of its angle of inclination to the main conveyor 1. The rotation of the belt conveyor is carried out by a chain transmission 11.

Automatic control of material flow occurs in the same sequence as with the sealing body, made in the form of a roller.

The proposed implementation of the feeder will significantly improve the quality of manufactured slabs and reduce the material consumption for the manufacture of a certain volume of plates due to the stability of their high performance.

Claims (2)

1. A feeder for bulk materials, containing a hopper placed above the conveyor, mounted for vertical movement on a lever suspension, sealing the working body with weights and mounted in the wall of the bunker with a gate valve attached to the end of the lever of the lever suspension, characterized in that increase the accuracy of automatic control of the flow of bulk material with varying density, it is equipped with an additional gate valve mounted in front of the sealing working body at the free end of the lever, the working body is placed in the bunker, and the ratio of the length of the lever arm with the gate valve placed in front of the working body to the arm length of the lever with the gate valve is located in the wall of the bunker, 1.3-1.5 values of the area ratio bulk and compacted material. 2. The feeder according to claim 1, is distinguished by the fact that the sealing-to-the-working body is made as an additional drive belt conveyor with a mechanism for changing its angle of inclination to the main conveyor. K-gtochnikn Inforklnnn, pru Ntye znimznie during examination 1. Author's USSR Ticket Office K 449817, cl. 28 C 7/06, 1972. 2. Authors certificate of the USSR 340541, cl. B 26 C 7 / G8, 1970.