RU2255892C2 - Skip dumper - Google Patents

Abstract

FIELD: materials handling facilities.

SUBSTANCE: invention relates to skip dumpers for hoists. Proposed device contains body, skips. Front wall of skip consists of articulated trays installed one over the other. Side walls of skip are interconnected by fixed wall and bottom and in front part, by posts-braces. Trays are provided with sides carrying levers furnished with rollers on cantilever part. Bottoms of trays in middle part are connected from outside to posts-braces, the latter being secured in side walls of skip through it their both ends. In initial position, trays are installed horizontally to prevent spilling of coal from skip body. To discharge coal from skip, skip is lifted to position in which rollers run onto discharge ski-making trays turn from horizontal position to position of angle of repose of material to be unloaded. This provides twisting of post-brace made in form of torsion bar and unloading of material from skip. Skip completely unloaded, it is lowered down, rollers move off discharge ski, and trays return in initial position under action of resilient forces of posts-brace, thus preparing skip for loading.

EFFECT: increased discharge capacity of skip and possibility of starting discharge of coal from top.

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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 interconnected by the back wall and the bottom, and in the front part when help struts / 1 /.

A disadvantage of the known devices 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 loads in the rope. The skip discharge 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 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.

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. The trays are fixed on struts with their outer middle part, and the outer edges of the trays are equipped with levers with rollers, which, 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 horizontal position is due to the elastic properties of the struts, struts, made in the form of torsion bars.

Figure 1 shows the proposed skip with a device for unloading it at a time when the lower hinge trays are in a horizontal 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 the side 2 and rear walls 3, reinforced with belts 4, and having an inclined bottom 5, and hinged trays 6, fixed with their middle part to the strut 7 and connected with their lateral edges to levers 8, bearing at their ends rollers 9, which can contact the unloading ski 10, mounted on the elements of the copra. The struts-struts 7 with their ends are fixedly fixed in the side walls 2, and their middle parts, as already noted above, are connected to the outer 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 horizontally, and the normal component of the spacer force acts on the front 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, 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 and approaching the unloading point where the unloading ski 10 is installed, the uppermost articulated tray 6 begins to contact it first, the roller 9 of which runs onto the ski 10 in its lower part, and, rolling along it, causes the lever to turn 8, 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 like 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 go down from it, 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 process of twisting it with unloading the skip), will turn to its original position and turn the hinged tray associated with it to the previous horizontal position. After the descent of all the rollers 9 from the unloading ski, all hinged trays will return to their original horizontal position, preparing the skip in a position suitable for loading it. In this form, the skip goes down to the loading point, where it is loaded from above.

Literature

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

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 installed with the possibility of rotation relative to the axes of struts-struts mounted between the side walls of the skip characterized in that the said trays are fixed on struts-struts with middle parts and are equipped with levers located on their lateral edges with rollers placed with the possibility of contact of each of them with unloading hydrochloric ski and rotation of each tray through an angle equal to the angle of repose of the material unloaded, the spacers are designed as torsion shafts, ensuring the return of trays in the original horizontal position without contact with said roller levers ski due to elastic deformation forces of the struts, the struts.

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