Gradient pulley block tensioning mechanism of mining adhesive tape machine

Abstract

The utility model is suitable for the technical field of underground coal mine mining belt conveyors, and provides a gradient pulley block tensioning mechanism for a mining belt conveyor, which comprises a movable pulley block connected to a moving trolley and a fixed pulley block arranged on a basic plane, the movable pulley block comprises a first movable pulley, a second movable pulley and a fourth movable pulley which are arranged in a triangle shape and a third movable pulley located at the center of the triangle shape, and the fixed pulley block comprises a first fixed pulley and a second fixed pulley. And the first movable pulley, the second movable pulley, the second fixed pulley, the fourth movable pulley, the first fixed pulley and the third movable pulley are connected with the tension sensor in sequence through the first movable pulley, the second movable pulley, the second fixed pulley, the fourth movable pulley, the first fixed pulley and the third movable pulley. And the problem that the moving trolley is deviated or separated from the track due to unbalanced torque is solved in the rapid winding and unwinding process of the steel wire rope.

Description

A tensioning mechanism for gradient pulley blocks of mining conveyor belts Technical Field

[0001] This utility model belongs to the technical field of underground conveyor belt machines in coal mines, and particularly relates to a gradient pulley block tensioning mechanism for a mine conveyor belt machine. Background Technology

[0002] The existing tensioning device for mining conveyor belts uses a horizontal pulley, as shown in Figure 1, with the wire rope wound around it. With the development of frequency conversion tensioning devices, characterized by high wire rope speeds, the traditional horizontal pulley system is prone to the risk of the wire rope falling off during rapid winding and unwinding.

[0003] For belt conveyors equipped with this type of fast-release wire rope tensioning device, the wire rope pulleys between the traditional traveling trolley and the tension sensor are mostly horizontally arranged pulley blocks. When the horizontal pulley design at both ends is applied to the fast-release wire rope tensioning device, due to the high rope speed and the frictional resistance of each pulley, the horizontally arranged left and right pulleys will cause uneven force on the left and right sides of the traveling trolley during the fast release of the wire rope, resulting in the traveling trolley deflecting or derailing from the track. Summary of the Invention

[0004] The purpose of this utility model embodiment is to provide a gradient pulley block tensioning mechanism for mining conveyor belts, which aims to solve the technical problems existing in the prior art mentioned in the background art.

[0005] This utility model embodiment is implemented as follows: a gradient pulley tensioning mechanism for a mining conveyor belt includes a movable pulley group connected to a traveling trolley and a fixed pulley group disposed on a base surface. The movable pulley group includes a first movable pulley, a second movable pulley, and a fourth movable pulley arranged in a triangular pattern, and a third movable pulley located at the center of the triangular pattern. The fixed pulley group includes a first fixed pulley and a second fixed pulley. After the wire rope is led out from the tensioning device drum, it passes sequentially through the first movable pulley, the second movable pulley, the second fixed pulley, the fourth movable pulley, the first fixed pulley, and the third movable pulley before connecting to a tension sensor. Preferably, the axes of the first movable pulley, the second movable pulley, the third movable pulley, the fourth movable pulley, the first fixed pulley, and the second fixed pulley are all perpendicular to the horizontal plane.

[0006] More preferably, the first movable pulley, the second movable pulley, and the fourth movable pulley have the same diameter, and the diameter of the third movable pulley is larger than that of the first movable pulley, the second movable pulley, and the fourth movable pulley.

[0007] More preferably, the diameter of the first fixed pulley is smaller than that of the second fixed pulley.

[0008] More preferably, both the fixed pulley assembly and the fixed pulley assembly are mounted on the moving trolley and the base surface respectively via mounting bases.

[0009] The beneficial effects of this utility model are: it can ensure that the direction of the rope exiting the pulley axis coincides with the center of the moving trolley, and eliminates the problem of the moving trolley being pulled off course or derailed due to unbalanced torque during the rapid winding and unwinding of the wire rope. Attached Figure Description

[0010] Figure 1 is a schematic diagram of the rope winding method of the existing tensioning device for mining conveyor belts mentioned in the background art;

[0011] Figure 2 is a schematic diagram of the gradient pulley tensioning mechanism of the mining conveyor belt provided in an embodiment of the present invention;

[0012] Figure 3 is a schematic diagram of the rope winding method provided in the embodiment of this utility model.

[0013] In the diagram: 1-Drum, 2-Moving trolley, 3-First movable pulley, 4-Second movable pulley, 5-Third movable pulley, 6-Fourth movable pulley, 7-First fixed pulley, 8-Second fixed pulley, 9-Tension sensor, 10-Wire rope. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0015] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but unless otherwise stated, these elements are not limited by these terms. These terms are used only to distinguish one element from another.

[0016] As shown in Figures 2 and 3, in one embodiment, a gradient pulley tensioning mechanism for a mining conveyor belt is proposed. The mechanism includes a movable pulley group connected to a traveling trolley 2 and a fixed pulley group set on a base surface. The movable pulley group includes a first movable pulley 3, a second movable pulley 4, and a fourth movable pulley 6 arranged in a triangular pattern, and a third movable pulley 5 located at the center of the triangular pattern. The fixed pulley group includes a first fixed pulley 7 and a second fixed pulley 8. After the wire rope 10 is led out from the tensioning device drum 1, it passes through the first movable pulley 3, the second movable pulley 4, the second fixed pulley 8, the fourth movable pulley 6, the first fixed pulley 7, and the third movable pulley 5 in sequence before being connected to the tension sensor 9.

[0017] In this embodiment of the utility model, instead of using the coaxial side-by-side design of the pulley block in the prior art, a gradient design is used in the radial direction. This ensures that the direction of the rope exiting the pulley axis coincides with the center of the trolley 2, thus eliminating the problem of the trolley 2 being pulled off course or the trolley derailing due to unbalanced torque during the rapid winding and unwinding of the wire rope 10.

[0018] As shown in Figure 2, in a preferred embodiment of this utility model, the axes of the first movable pulley 3, the second movable pulley 4, the third movable pulley 5, the fourth movable pulley 6, the first fixed pulley 7, and the second fixed pulley 8 are all perpendicular to the horizontal plane. In this embodiment of the utility model, the advantage of having the axes of the pulleys in both the movable and fixed pulley groups perpendicular to the horizontal plane is that even when the wire rope 10 is not taut, it can still fall into the pulley grooves due to gravity and will not come loose.

[0019] As shown in Figure 2, in a preferred embodiment of this utility model, the first movable pulley 3, the second movable pulley 4, and the fourth movable pulley 6 have the same diameter, and the diameter of the third movable pulley 5 is larger than that of the first movable pulley 3, the second movable pulley 4, and the fourth movable pulley 6. The diameter of the first fixed pulley 7 is smaller than that of the second fixed pulley 8.

[0020] The purpose of the above-mentioned configuration in this embodiment of the present invention is to achieve a radial gradient design. Of course, in actual applications, the diameter ratio between the pulleys can be determined according to actual needs, and this embodiment does not impose specific limitations here.

[0021] As shown in Figure 2, in a preferred embodiment of this utility model, the fixed pulley block and the fixed pulley block are respectively mounted on the mobile trolley 2 and the base surface via mounting bases.

[0022] In this embodiment of the utility model, each pulley in the fixed pulley group is installed on the same mounting base, which can be fixedly connected to the trolley 2. Similarly, each pulley in the fixed pulley group is installed on the same mounting base, which is fixed to the base surface.

[0023] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0024] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tensioning mechanism for a gradient pulley block of a mining conveyor belt, characterized in that, The mechanism includes a movable pulley group connected to the moving trolley (2) and a fixed pulley group set on the base surface. The movable pulley group includes a first movable pulley (3), a second movable pulley (4) and a fourth movable pulley (6) arranged in a triangular shape, and a third movable pulley (5) located at the center of the triangular shape. The fixed pulley group includes a first fixed pulley (7) and a second fixed pulley (8). After the wire rope (10) is led out from the tensioning device drum (1), it passes through the first movable pulley (3), the second movable pulley (4), the second fixed pulley (8), the fourth movable pulley (6), the first fixed pulley (7) and the third movable pulley (5) in sequence before being connected to the tension sensor (9).

2. The tensioning mechanism of the gradient pulley block for a mining conveyor belt according to claim 1, characterized in that, The axes of the first movable pulley (3), the second movable pulley (4), the third movable pulley (5), the fourth movable pulley (6), the first fixed pulley (7), and the second fixed pulley (8) are all perpendicular to the horizontal plane.

3. The tensioning mechanism of the gradient pulley block for a mining conveyor belt according to claim 2, characterized in that, The first movable pulley (3), the second movable pulley (4) and the fourth movable pulley (6) have the same diameter, and the diameter of the third movable pulley (5) is larger than that of the first movable pulley (3), the second movable pulley (4) and the fourth movable pulley (6).

4. The tensioning mechanism of the gradient pulley block for a mining conveyor belt according to claim 1, characterized in that, The diameter of the first fixed pulley (7) is smaller than that of the second fixed pulley (8).

5. The tensioning mechanism of the gradient pulley block for a mining conveyor belt according to claim 1, characterized in that, Both the fixed pulley block and the fixed pulley block are mounted on the moving trolley (2) and the foundation surface respectively via mounting bases.

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