Double-layer double-conveying belt type conveyer for mine

Abstract

The invention discloses a double-layer double-conveying belt type conveyer for a mine. Racks and adhesive tapes of two sets of belt conveyers are overlapped longitudinally; a tensioning direction-changing mechanism of the belt conveyer on the upper layer is located in front of a drive mechanism on the lower layer; a tensioning direction-changing mechanism of the belt conveyer on the lower layer is arranged in a trench below a mounting basal surface and is adjacent to the drive mechanism on the lower layer; each of wheels at two ends of a tensioning car is provided with a double-wheel flange; anti-derail wheels in contact with the side faces of a guide rail are arranged at two sides below a car body; a plurality of supporting legs of rectangular frames in the middle parts of the two sets of belt conveyers are all double-layer composite supporting legs; the double-layer composite supporting legs are provided with a plurality of adjustable hoops; the rectangular frames on the upper layerand the lower layer are arranged in the corresponding hoops respectively; and each of the rectangular frames on the upper layer and the lower layer is connected with a lower supporting roller by a mounting frame, a groove-shaped supporting roller and a concave arc-shaped supporting frame. The double-layer double-conveying belt type conveyer for the mine guarantees stable, safe and high-efficiencyrunning of equipment, is convenient to mount and wide in the range of application, and has high application value for small and medium mines, in particular for the improvement of old conveying roadways.

Description

technical field [0001] The invention relates to a belt conveyor used underground in coal mines. Background technique [0002] Because of its large conveying capacity, long conveying distance, safety and reliability, high degree of automation, easy maintenance, low operating costs and wide application range, belt conveyors are widely used in various industries in my country, especially more than 90% of coal mines use belt conveying machine as a means of transportation. Small and medium-sized coal mines in Southwest my country are mainly mountainous inclined coal seams. Due to thin coal seams and complex coal seam divisions, the space of underground roadways is limited by investment and coal seams, and it is impossible to install large-scale and efficient conveying systems. Belt conveyors are generally used; existing The belt conveyor includes a frame, upper and lower rollers on the frame, a driving mechanism, a tensioning and redirecting mechanism, a belt, and a tail roller. T...

AI Technical Summary

Problems solved by technology

[0004] Both of the above two devices are modified from standard belt conveyors. In order to meet the layout of the drive mechanism and tension redirection mechanism of the upper and lower layers of equipment, the drive mechanism of the belt conveyor on the upper layer of the belt conveyor has to be transferred to the lower layer. The height between the tensioning and reversing mechanisms of the belt conveyor (especially the driving mechanism and the tensioning mechanism of the lower belt conveyor) increases, and the difficulty of equipment installation increases. As the height of the equipment increases, the safety of equipment operation, The stability is correspondingly reduced, and because the height of the equipment increases, the height of the conveying roadway also needs to be increased accordingly, which increases the difficulty of roadway construction and investment costs

At the same time, its driving device, tensioning and redirecting mechanism, and the frame are too wide, which needs to occupy the pedestrian or inspection passage of the roadway, which will bring inconvenience to the passage of personnel, equipment maintenance and material transportation in the future.

In some equipment, the tensioning redirection mechanism is set at the tail of the belt conveyor to reduce the height of the tensioning mechanism, so as to save roadway investment. However, due to the long distance between the tensioning redirection mechanism and the driving mechanism, it takes a while to provide tension. , so when the equipment is started, the tension between the tape and the roller of the driving mechanism is small, resulting in small friction, and the tape is prone to slipping

[0005] The suspended double-layer belt conveyor is to arrange two suspended belt conveyors up and down on the same roadway floor, such as figure 2 As shown, the two corresponding legs 50 on both sides of the tape are connected by the upper and lower layers of grooved rollers 51 and the lower rollers 52. Since the grooved rollers 51 are suspended, the distance between the upper and lower tapes is small, and double-layer installation The height of the rear equipment is low, the requirements for the roadway are not high, and its structure is relatively simple and economical; however, because the hanging idler 51 cannot be installed with a self-aligning idler, and the resistance of the idler is large, the failure rate of the equipment is high, the belt is easy to run off, and the equipment High energy consumption and low conveying efficiency; at the same time, due to the high center of gravity of the double-layer belt conveyor and the structure of its hanging idler rollers, the idler rollers are in the form of activities. The rollers 51 and 52 (especially the upper rollers) will swing with the external force and cause the vibration and deformation of the frame, which poses a great safety hazard

Since there is no tape to prevent the tape from being carried on the lower layer of the concave arc section (it is lifted when the tape is tightened and moved from bottom to top), and the idler 51 has no fixed hanging structure, the equipment cannot realize concave arcs, convex arcs, etc. Running under the condition of variable slope, only two-point straight-line conveying can be realized; the outrigger 50 is connected with the rectangular frame by fixing bolts. Due to the complex underground terrain, the height and spacing of the outriggers of the belt conveyor are greatly affected by terrain changes, and the fixing bolts The connection cannot be adjusted accordingly, resulting in uneven belt surface of the belt conveyor. At the same time, it is inconvenient to install, adjust, maintain and disassemble the rectangular frame of the equipment and the outrigger 50

[0006] The fixed double-layer belt conveyor is to arrange two ordinary belt conveyors up and down on the same roadway floor, such as figure 1 As shown, the corresponding two supporting legs 55 on both sides of the adhesive tape are provided with upper and lower two-layer mounting frames 56, and each layer of mounting frames 56 is connected by a grooved roller 57, a linear support frame 58 and a lower roller 59. After installation The height of the equipment is high, the potential safety hazards of the equipment are large, and the stability is poor. At the same time, the height of the ordinary roadway cannot meet the needs of the equipment, and the roadway needs to be increased to install

Since there is no prevention of the belt on the lower layer of the concave arc section (it is lifted when the tape is tightened and moved from bottom to top), the equipment cannot operate under conditions of variable slopes of more than 6° such as concave arcs and convex arcs; the lower idler roller 59 is installed in the form of a card slot, and the installation shafts at both ends of the lower idler 59 are easy to jump out of the slot during operation, and the lower idler is prone to fall; The terrain is complex, the height and spacing of outriggers are greatly affected by terrain changes, and the fixed bolt connection cannot be adjusted accordingly, resulting in uneven belt surface of the belt conveyor. It is inconvenient to disassemble; the above-mentioned belt conveyors have seriously restricted the increase of coal mine output, so coal mine enterprises urgently need a conveyor that saves space, has a large transport capacity, and has high safety performance

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