Supporting leg for convex arc position of underground coal mine

Abstract

The utility model discloses a landing leg for a convex arc position under a coal mine, which relates to the field of belt conveyors, and comprises a support frame, a carrier roller frame and carrier rollers, the carrier roller frame is hinged with the support frame, and the top of the carrier roller frame is provided with a plurality of carrier rollers which are arranged front and back along the conveying direction. Compared with the prior art, the supporting frame has the advantages that the supporting frame is arranged on the convex arc section of the belt conveyor, the conveying belt is supported through the multiple supporting rollers on the rotatable supporting roller frame, local deviation rectification of the conveying belt is achieved, meanwhile, the pulling stress of the conveying belt is evenly borne, and the conveying belt of the convex arc section can operate safely and stably.

Description

Technical Field

[0001] The utility model relates to the field of belt conveyors, in particular to a support leg used at a convex arc in an underground coal mine. Background Art

[0002] Belt conveyors are important equipment for conveying and loading and unloading bulk materials. They are widely used in coal mining due to their long conveying distance, high efficiency, simple structure, easy maintenance, and low equipment and maintenance costs.

[0003] When the terrain conditions of the roadway change due to faults in the coal mine, the laying of the belt conveyor will change with the change of the roadway slope. Belt conveyors are designed in various forms according to actual needs, some of which are upward transport and have a convex arc shape.

[0004] When designing a belt conveyor, it is usually inevitable to encounter convex arc inflection points. In many cases, due to the limitations of space or process conditions, the curvature radius of the convex arc is too small. If the conventional design is followed, the conveyor belt at the convex arc will be arched or folded in the middle due to uneven force after operation, which not only seriously affects the service life of the conveyor belt, but also easily causes safety hazards such as material spillage and conveyor belt tearing.

[0005] like Figure 1 As shown, when the conveyor belt 1 passes through a convex arc section, the conveyor belt 1 and the material are always trying to press the conveyor belt 1 onto the roller 2 under the action of gravity and tension. Since the edge radius of the conveyor belt 1 in the convex arc section is larger than the center radius, the tensile stress at the edge of the conveyor belt 1 is greater than the stress in the center, and may even exceed the allowable stress of the conveyor belt 1. The roller 2 in the convex arc section bears a greater radial load generated by the conveyor belt 1 than the roller 2 in the straight section. If the vertical convex arc curve section is in the part with the lowest tension in the entire system, the stress value at the center of the conveyor belt 1 may be negative, resulting in arching in the middle of the conveyor belt 1 in the convex arc section, and even causing the middle part of the conveyor belt 1 to fold. The existing solution is usually to arrange the legs 3 and rollers 2 in segments and in a denser manner. This arrangement is relatively complex in structure, has many non-standard parts, and is relatively expensive. In addition, the rollers 2 are subjected to large forces and are easily damaged. Utility Model Content

[0006] The technical problem to be solved by the utility model is how to enable the conveyor belt of the convex arc section to run safely and smoothly.

[0007] The utility model solves the above-mentioned technical problems through the following technical means: a support leg for a convex arc section in an underground coal mine, comprising a support frame, a roller frame, and rollers, the roller frame being hinged to the support frame, and a plurality of rollers arranged in a front-to-rear manner along the conveying direction being provided on the top of the roller frame. The support frame is arranged in the convex arc section of the belt conveyor, and the plurality of rollers on the rotatable roller frame support the conveyor belt, thereby achieving local deviation correction of the conveyor belt and uniformly bearing the tensile stress of the conveyor belt, so that the conveyor belt in the convex arc section can run safely and smoothly.

[0008] As an optimized technical solution, the idler frame features multiple sets of notches arranged vertically for each idler position, with each roller mounted at either end in one of these notches. Adjusting the idler's mounting height allows for better localized belt deviation correction and evenly distributes belt tension.

[0009] As an optimized technical solution, the support legs used at the convex arc in underground coal mines also include vertical rollers. A set of vertical rollers is mounted on each of the front and rear ends of the roller support frame along the conveying direction. Each set includes two vertical rollers, one on each side of the conveyor belt width. When the conveyor belt deviates, its edge contacts the vertical rollers, which guide and reset the conveyor belt and prevent it from deviating after operation.

[0010] As an optimized technical solution, the vertical roller includes a vertical roller shaft and a roller body rotatably connected to the outer periphery of the vertical roller shaft, and the vertical roller shaft is threadedly connected to the roller frame. The structure is simple and easy to disassemble and assemble.

[0011] As an optimized technical solution, the support legs used at the convex arc in coal mines also include limit blocks. The limit blocks are fixedly connected to both sides of the support frame, and the bottom of the roller frame corresponds to the limit blocks located below them. The limit blocks are used to limit the rotational position of the roller frame.

[0012] As an optimized technical solution, the support leg used at the convex arc in the coal mine also includes a pin shaft, and the roller frame is hinged to the support frame through the pin shaft.

[0013] As an optimized technical solution, a gasket is provided on the portion of the pin shaft located between the roller frame and the support frame.

[0014] As an optimized technical solution, the support frame includes columns, a base plate, and a lap plate. Two columns are respectively arranged on either side of the conveyor belt in the width direction. The bottom of each column is fixedly connected to the base plate, and the top of each column is fixedly connected to the lap plate. The lap plate is used to fix the lap plate to the upper crossbeam of the belt conveyor.

[0015] As an optimized technical solution, the support frame further includes a cross brace, and the cross brace is fixedly connected between the two columns.

[0016] As an optimized technical solution, the bottom plate is made of steel plate, and the columns, cross braces and lap plates are all made of channel steel.

[0017] The advantages of the present invention are:

[0018] 1. Set the support frame at the convex arc section of the belt conveyor, and support the conveyor belt through multiple rollers on the rotatable roller frame to achieve local deviation correction of the conveyor belt, while evenly bearing the tensile stress of the conveyor belt, so that the conveyor belt in the convex arc section can run safely and smoothly.

[0019] 2. When the conveyor belt deviates, its edge will contact the vertical roller. The vertical roller plays the role of guiding, resetting and preventing the conveyor belt from deviating after operation.

[0020] 3. Simple structure, easy to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the support structure of an existing belt conveyor at a convex arc in an underground coal mine.

[0022] Figure 2 This is a schematic diagram of the support structure of the belt conveyor at the convex arc in an underground coal mine according to an embodiment of the utility model.

[0023] Figure 3 This is a schematic main view of a support leg used at a convex arc in an underground coal mine according to an embodiment of the utility model.

[0024] Figure 4 This is a left-side schematic diagram of a support leg used at a convex arc in an underground coal mine according to an embodiment of the utility model. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0026] like Figures 2 to 4 As shown, an embodiment of the utility model discloses a support leg for a convex arc in an underground coal mine, comprising a support frame 4, a roller frame 5, a pin 6, a limit block 7, a roller 8 and a vertical roller 9.

[0027] The roller frame 5 is hinged to the support frame 4 through a pin 6, and a gasket is provided on the part of the pin 6 located between the support frame 4 and the roller frame 5; the two sides of the support frame 4 are fixedly connected to the limit blocks 7, and the two sides of the bottom of the roller frame 5 correspond to the limit blocks 7 located below it, and the limit blocks 7 are used to limit the rotation position of the roller frame 5; the top of the roller frame 5 is provided with four rollers 8 arranged front and back along the conveying direction, and the position corresponding to each roller 8 on the roller frame 5 is provided with three groups of notches arranged up and down along the height direction. The two ends of the roller 8 are installed in one of the notches, and the rollers are adjusted by adjusting the position of the rollers. The installation height of 8 can better realize the local deviation correction of the conveyor belt 1, and at the same time evenly bear the tensile stress of the conveyor belt 1; a group of vertical rollers 9 are installed on the front and rear ends of the roller frame 5 along the conveying direction, and each group includes two vertical rollers 9 respectively arranged on both sides of the width direction of the conveyor belt 1. When the conveyor belt 1 deviates, its edge will contact the vertical roller 9, and the vertical roller 8 plays a role in guiding, resetting and preventing the deviation of the conveyor belt 1 after operation; the vertical roller 9 includes a vertical roller shaft and a roller body rotatably connected to the outer periphery of the vertical roller shaft, and the vertical roller shaft is threadedly connected to the roller frame 5, with a simple structure and convenient disassembly and assembly.

[0028] The support frame 4 includes a base plate 41, columns 42, lap plates 43 and cross braces 44. The two columns 42 are respectively arranged on both sides of the width direction of the conveyor belt 1. A cross brace 44 is fixedly connected between the two columns 42. The bottom of each column 42 is respectively fixedly connected to the base plate 41, and the top of each column 42 is respectively fixedly connected to the lap plate 44. The lap plate 44 is used to be fixedly connected to the upper crossbeam of the belt conveyor; the base plate 41 is made of steel plate, and the columns 42, cross braces 43 and lap plates 44 are all made of heavy channel steel.

[0029] Working principle: The support frame 4 is set on the convex arc section of the belt conveyor, and the conveyor belt 1 is supported by the four rollers 8 on the rotatable roller frame 5 to achieve local deviation correction of the conveyor belt 1, and at the same time evenly bear the tensile stress of the conveyor belt 1, so that the conveyor belt 1 in the convex arc section can run safely and smoothly.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A support leg for a convex arc in a coal mine, comprising a support frame, a roller frame, and rollers, characterized in that: The roller frame is hinged to the support frame, and a plurality of rollers arranged front and back along the conveying direction are provided on the top of the roller frame; a plurality of groups of notches arranged up and down along the height direction are provided on the roller frame corresponding to each roller position, and both ends of the roller are installed in one group of notches.

2. The support leg for a convex arc in an underground coal mine according to claim 1, characterized in that: The support legs used for the convex arc in the coal mine also include vertical rollers. A group of vertical rollers are installed on the front and rear ends of the roller frame along the conveying direction, and each group includes two vertical rollers respectively arranged on both sides of the conveyor belt in the width direction.

3. The support leg for a convex arc in an underground coal mine according to claim 2, characterized in that: The vertical roller comprises a vertical roller shaft and a roller body rotatably connected to the outer periphery of the vertical roller shaft, and the vertical roller shaft is threadedly connected to the roller frame.

4. The support leg for a convex arc in an underground coal mine according to claim 1, characterized in that: The support leg used for the convex arc in the coal mine also includes a limit block. The two sides of the support frame are fixedly connected to the limit blocks respectively, and the two sides of the bottom of the roller frame correspond to the limit blocks located below it respectively.

5. The support leg for a convex arc in an underground coal mine according to claim 1, characterized in that: The support leg used for the convex arc in the coal mine also includes a pin shaft, and the roller frame is hinged to the support frame through the pin shaft.

6. The support leg for a convex arc in an underground coal mine according to claim 5, characterized in that: A washer is sleeved on a portion of the pin shaft located between the roller frame and the support frame.

7. The support leg for a convex arc in an underground coal mine according to claim 1, characterized in that: The support frame includes a column, a base plate and a lap plate. The two columns are respectively arranged on both sides of the conveyor belt in the width direction. The bottom of each column is fixedly connected to the base plate, and the top of each column is fixedly connected to the lap plate.

8. The support leg for a convex arc in an underground coal mine according to claim 7, characterized in that: The support frame also includes a cross brace, and the cross brace is fixedly connected between the two columns.

9. The support leg for a convex arc in an underground coal mine according to claim 8, characterized in that: The bottom plate is made of steel plate, and the columns, cross braces and lap plates are all made of channel steel.

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