RU2312812C1 - Skip unloading device - Google Patents

Abstract

FIELD: mining, particularly skip unloading means.

SUBSTANCE: device comprises lock made as trays arranged one over another and rotating around spacing post axes. The spacing posts are mounted between skip sides. The trays are secured to spacing posts and have levers with rollers arranged from side edges thereof. The rollers may touch unloading skid for each tray rotation through angle equal to natural inclination of material to be unloaded. Said trays are secured to spacing posts by inner edges thereof. The spacing posts are shifted a distance into device interior towards rear wall along side wall. The distance is equal to tray width. To retain trays between said side walls in predetermined initial position cross-pieces are installed at front edges thereof. In initial position the trays are arranged so that coal is prevented from spillage from skip body.

EFFECT: increased unloading capability.

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.

A known design of a skip with a slide gate that moves during the movement of the skip, and its fixation with stops, the front wall of the skip made movable relative to the side walls fixed to the skip frame motionlessly and interconnected by the rear wall and the bottom, and in the front part when help 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. Skip unloading speed 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 process of unloading the skip can be intensified, for example, rotary trays are installed in the device along the entire height of the front wall of the body, which are in a horizontal position with overlapping height. After loading the skip body with material, the trays form a shutter by backing up the material. Material is unloaded from the body by turning the trays at an angle equal to the angle of repose of the loaded material. The rotation of the trays can be made under the action of a deflecting ski mounted on the trunk reinforcement [2].

However, when interacting with the deflecting ski of these trays, there are forces acting on the elements of the copra or trunk reinforcement. The arising forces when turning the trays are due to the interaction of the trays when they are rotated in a stack of material located on the tray, and the material is "cut" in the lower part of the stack, moving the material separated from the stack up and to the discharge side. The disadvantage is also that after unloading the material from the body, the trays after some time of operation of the skip do not return to a strictly horizontal position before unloading, which creates abnormalities in work.

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 created by the engine to unload the skip, increase the unloading ability of the skip, and carry out the process of unloading the skip, starting from the top, and after unloading the skip, the trays should occupy a strictly specified initial position.

This goal is achieved in that the shutter is made of hinged trays located one above the other with the possibility of rotation relative to the axis of the struts-struts installed between the side walls, while the trays are fixed on the struts-struts with its inner part, and the outer side edges of the trays are equipped with levers with rollers that, when in contact with the unloading ski, turn the trays at an angle equal to the angle of repose of the unloaded material, and in the absence of contact of the rollers with the unloading ski, return the trays to the initial position is carried out due to the elastic properties of struts-struts made in the form of torsion bars. The said trays are located on strut racks and secured with their internal initial parts, while the strut racks themselves are moved inward along the side wall, towards the rear wall, by the size of the tray width, to fix the specified initial position of the trays, between the indicated side walls, at their front edges, spacers installed. These spacers allow, after unloading the skip, to set the trays not in a strictly horizontal position, but in a position with a raised outer edge. Such an initial position before loading creates better conditions for holding the material both when loading material into the body, and when moving the skip body along the barrel. This initial position of the trays is ensured during assembly and reassembly due to the initial spin of the torsion bars turning the tray to the specified stop. Moreover, the magnitude of the torsion force is such that it is sufficient to hold the tray in this position and if there is a portion of the material on it, determined by the area of the tray.

Figure 1 shows the proposed skip with a device for unloading it at a time when the lower hinge trays are in the initial position before unloading coal, and the upper hinge trays are rejected by unloading ski and set to the position for unloading coal;

figure 2 shows a view along arrow A of the proposed skip at the moment when the hinge tray is in the unloading position of the skip.

The skip unloading device consists of a frame 1, on which a body is mounted from side 2 and rear walls 3, reinforced with belts 4, and having an inclined bottom 5, and hinged trays 6, fixed with their inner part of the outer edge to the strut-strut 7 and connected by their outer lateral edges with levers 8, bearing rollers 9 at their ends, which can contact the unloading ski 10, mounted on the elements of the copra. To limit the angle of rotation of the hinge trays 6 and additional reinforcement of the skip body, spacers are installed between its side walls 2. The struts 7 with their ends are fixedly fixed in the side walls 2, and their middle parts are connected to the inner edge of the hinge tray 6.

Before loading the skip, all of its hinged trays are in the position shown in the lower part of the body in figure 1 (but the material on the trays will be absent). When filling the skip body with material, its trays will occupy the position depicted in the lower part of the body along 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 tray is located almost horizontally, and the normal component of the spacer force acts on the inner edge of the tray, the total force acting on the tray is small. In addition to the spacer force, a vertical force acts on the hinge tray equal to the weight of the material on the tray. Since the tray area is small, both the amount of material on the tray and the vertical force exerted on the tray are small, therefore, the initial twist of the torsion bar is selected so that it is sufficient to hold the tray with the material located on it in the position shown in the drawing.

Skip unloading is carried out as follows. After raising the skip to the surface and approaching the unloading point where the unloading ski 10 is installed, the uppermost articulated tray 6 begins to contact with it, the roller 9 of which runs onto the ski 10 in its lower part and, rolling along it, causes the lever 8 to turn , which, in turn, will rotate the tray 6 counterclockwise relative to the axis of the strut 7, which will occupy the position shown on the upper trays. At the same time, the strut-strut 7 will be twisted as a torsion shaft. Having stood in the position to the stack at an angle of repose of the unloaded material, the hinged tray facilitates the sliding of the unloaded material along it and unloading it from the skip body. After lifting the skip body until the lower roller 9 reaches the unloading ski 10, deflecting the last articulated tray and completely unloading the skip body, the skip is ready to lower it down. When lowering the skip down, all the rollers 9, rolling down the unloading ski 10, will descend from it down, and after the descent, the strut-strut 7, being a torsion shaft, due to the potential energy of elastic deformation stored in it (during the previous additional twisting process with unloading the skip), it will turn to its original position and turn the hinge tray associated with it to the previous position, which is limited by the location of the spacers 11. After all the rollers 9 are off the unloading ski, all the hinges will stand up starting position, setting a skip to a position suitable for its download. In this form, the skip goes down to the loading point, where it is loaded from above.

Information sources

1. Patent R.F. No. 2007361, cl. B66B 17/26, 1994.

2. Patent R.F. No. 2255892, cl. B66B 17/26, 17/08, 2003.

Claims (1)

A device for unloading the skip, the side walls of which are fixedly mounted on its frame and connected with the rear wall and the bottom, containing a shutter made in the form of trays located one above the other and mounted with the possibility of rotation relative to the axes of struts-struts mounted between the side walls of the skip, the trays are fixed on struts-struts and equipped with levers located on their lateral edges with rollers placed with the possibility of contact of each of them with the unloading ski and rotation of each tray at an angle equal to the natural slope of the unloaded material, and the strut struts are made in the form of torsion shafts, providing the trays return to their original position in the absence of contact of the lever rollers with the said ski due to the elastic deformation forces of these strut struts, characterized in that the said trays are mounted on the struts spacers with their inner edges, the strut racks themselves are moved inward along the side wall towards the back wall by the amount of the width of the tray, and to fix the specified initial position of the trays between the decree spacers are installed at their front edges at the side walls.

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