RU2281905C1 - Skip unloader - Google Patents

Abstract

FIELD: mining industry; housing devices.

SUBSTANCE: proposed device contains gate made in form of chutes turning relative to side walls of skip and installed one after the other. Side walls of skip are intercoupled by fixed rear wall and bottom. Device contains also fixed chutes arranged in front part of skip. Returnable chutes are interconnected by means of torsion hinge joints with fixed chutes installed under turnable chutes whose plane is arranged at angle of repose of material to be unloaded. Sealed envelopes arranged between turnable and fixed chutes are connected by pipeline to compressed air bottle through three-way cock, and said hinge joint of turnable chutes and fixed chutes is found between their inner edges.

EFFECT: increased capacity of unloading.

2 dwg

Description

The invention relates to the mining industry, in particular, to mine lifting installations, to lifting vessels such as skips, to devices for unloading them.

There is a known design of a skip with a slide gate that moves during the movement of the skip and its fixation by means of stops, the front wall of the skip being movable relative to the side walls fixed to the skip frame fixedly and connected by a back wall and a bottom, and in the front part by struts / 1 /.

A disadvantage of the known device for loading and unloading the skip is that for shifting the movable front wall requires considerable force, which is applied from the engine and additionally causes an increase in the loads in the rope. The speed of unloading the skip depends on the speed of movement of the front wall. Since the speed of movement of the front wall is limited, there is a limitation of the unloading ability of the skip. The absence of a rigid connection between the front wall and side walls reduces the rigidity of the skip body structure.

The purpose of the invention is the creation of a device for unloading skip, which would be devoid of these disadvantages, i.e. reduce the force exerted by the engine to unload the skip, increase the unloading ability of the skip, and carry out the process of unloading the skip over the entire cross section of the front wall.

This goal is achieved in that the shutter is made of trays located one above the other, and the stationary trays are installed between the side walls at an angle of repose of the unloaded material and additionally perform the functions of stiffeners for the side walls. The upper pivoting trays are pivotally connected by their inner sides to the fixed trays. In this case, the rotating trays can occupy a position - from an equal angle of repose of the unloaded material to a position limited by the location of the lower part of the upper adjacent fixed tray. The movement and location of the rotating trays is determined by the amount and pressure of compressed air located in the elastic shells located between the rotating and fixed trays and the torsion action of the hinge.

Figure 1 shows the proposed skip with a device for unloading it at the moment when the upper pivoting trays are in the upper position before loading in the upper part of the skip and in the partially loaded lower part of the skip;

figure 2 shows the skip of figure 1 with the location of the upper part of the trays at the moment when the compressed air is released from the shells and the upper pivoting trays have taken the extreme position at which the skip is unloaded (coal unloaded is not shown conditionally so as not to clutter the drawing).

The skip unloading device consists of a frame 1, on which a body is mounted from the side 2 and rear walls 3, reinforced with belts 4, and having an inclined bottom 5, and fixed trays 6 installed between the side walls 2, fastened with them and additionally acting as stiffeners (the plane of the stationary trays 6 is located at an angle greater than (or equal to) the angle of repose of the unloaded material), and the rotating trays 7 located above the stationary and associated torsion hinge 8, which have between them a tight elastic shell 9 (for example, rubber), connected by a pipe 10 through a three-way valve 11 with a cylinder of compressed air 12. The three-way valve 11 is switched by a finger 13 mounted on the elements of the barrel reinforcement, under which the three-way valve is installed in one fixed position when lifting the skip to the unloading position. Under the action of the same finger, the three-way valve is moved to another fixed position when the skip goes down after it is unloaded.

Before loading the skip all pivoting trays 7 are in the position shown in figure 1. After filling the skip body, the material (coal) will occupy the position depicted in the lower part of the body over the entire height of the body.

It should be noted that after loading the skip body with bulk material, a spacer force begins to act on all its walls, the normal component of which causes bending and tensile forces of the wall planes. The magnitude of this effort is proportional to the product of the normal component of the thrust force and the area over which this force acts. Since the rotating trays are located horizontally, and the normal component of the spacer force acts on the end of the tray, the total force acting on the rotating trays is small.

In addition to the spacer force, the rotating trays are subject to a vertical force equal to the weight of the material on the tray. Since the tray area is small, the amount of material on the tray is small and the vertical force acting on the tray is small.

Skip unloading is carried out as follows. After raising the skip to the surface when approaching the unloading point, where the unloading pin 13 is installed, the latter transfers the three-way valve 11 to the position in which the pipeline 10 will be connected to the atmosphere. In this case, compressed air from all shells 9 exits through the pipeline 10 into the atmosphere through a three-way valve 11. Under the influence of the weight of the coal located on the rotating trays 7, and the action of the torsion joints 8 they will be rotated relative to the torsion joint 8 counterclockwise and will occupy the position shown figure 2.

Having taken a position to the stack at an angle of repose of the unloaded material, the rotating trays contribute to the sliding of the material along it and unloading it from the skip body.

At the end of unloading, the skip drops down. In this case, the finger 13, while stationary, forces the skip to move downward to take the position of the three-way valve 11, in which the pipe 10 is connected to a cylinder of compressed air 12. Under the action of compressed air, all the shells 9 are filled, which, expanding, force the rotating trays 7 to occupy the position shown in the upper part of figure 1, thus preparing the skip to load it at the lower loading hopper, where it can be loaded from above.

Thus, in the proposed device for unloading the skip, an external force is applied to it, practically equal to zero and necessary only for switching the three-way crane. There is also no force of the locking element acting on the unloaded material - the unloaded material itself transfers its turning trays to the position corresponding to unloading. As the supply of compressed air in the cylinder 12 is consumed and the pressure in it drops, the cylinder is replaced by a replacement one with a new portion of compressed air, or it can be filled when the skip is located, for example, at the discharge hopper during unloading of the skip. The design of these devices is not considered in the application, since it is not the subject of this invention.

Literature

1. Patent R.F. No. 2007361, cl. B 66 B 17/26, 1994.

Claims (1)

A device for unloading a skip containing a shutter made in the form of trays rotating relative to the side walls of the trays, arranged successively one above the other, the side walls of the skip are fixedly mounted on its frame and connected to the rear wall and the bottom, characterized in that it is equipped with fixed trays, the plane of which located at an angle of repose of the material being discharged and which are placed between the side walls with the possibility of formation of stiffeners for these walls, each rotating tray the shutter is located above the corresponding fixed tray with the possibility of changing its position with an angle equal to the angle of repose of the unloaded material, and with a placement limited by the location of the lower part of the upper adjacent tray, while the rotating and fixed trays corresponding to each other are interconnected by a torsion bar a hinge with the placement of this hinge joint between their inner edges, and between each of the trays connected by a torsion hinge ung shell, wherein the shell trays are attached to the conduit cylinder of compressed air through the three-way valve.

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