Middle tensioning device

Abstract

The utility model provides a middle tensioning device which comprises a sliding frame and a sliding frame guide rail, a tensioning support A and a tensioning support B are arranged at the two ends of the sliding frame guide rail, a threaded guide rod is arranged between the tensioning support A and the tensioning support B, a turnabout drum A is installed on the tensioning support A, a turnabout drum B is arranged on the sliding frame, and the turnabout drum A and the turnabout drum B are arranged on the sliding frame guide rail. The tensioning support A and the tensioning support B are installed on the belt conveyor and fixed to a middle frame of the belt conveyor in a welded mode. Connection is conducted through the threaded guide rod, the stability of the whole structure is guaranteed, meanwhile, the threaded guide rod of the tensioning device is adjusted to adjust the appropriate tensioning stroke distance, the situation that landing legs are avoided is not needed in the design process, the tensioning support A and the tensioning support B can serve as the landing legs, the landing legs can not be arranged on an over-short belt conveyor, and the design is convenient. The tensioning device is directly adopted as a supporting leg, and the problem that the tensioning device is not easy to install on the belt conveyor is solved.

Description

Technical Field

[0001] This utility model relates to the field of conveying equipment technology, and in particular to a central tensioning device. Background Technology

[0002] Currently, in the operation of belt conveyors, due to process limitations in certain situations, such as reversible conveyors, bagged cement conveyors, or processes with low height, tensioning devices cannot be installed vertically in the middle of the conveyor corridor, nor can they be installed at the tail end with spiral or trolley-type tensioning devices. This prevents belt conveyors from fulfilling their operational requirements. Currently, the common solution to this problem is to install tensioning devices, such as the published patent 202123242624.9, which discloses a double-roller vertical hydraulic tensioning device that uses wire ropes for tensioning. However, wire ropes or belts, due to their material and structural limitations, are prone to breakage and are extremely inconvenient to adjust, making fine adjustments impossible. Furthermore, the installation location must avoid outriggers; otherwise, it cannot be installed on the belt conveyor. Shorter conveyor systems also cannot accommodate outriggers, and adding such a mechanism could easily lead to tipping. Therefore, solving the problem of installing tensioning devices on belt conveyors is particularly important. Utility Model Content

[0003] The purpose of this utility model is to provide a central tensioning device that is connected by a threaded guide rod to ensure the stability of the entire structure. At the same time, by adjusting the threaded guide rod of the tensioning device, the appropriate tensioning stroke distance can be adjusted. In the design, there is no need to consider avoiding the support legs. Tensioning bracket A and tensioning bracket B can be used as support legs. In belt conveyors that are too short, support legs can be omitted and this tensioning device can be used directly as support legs, thus solving the problem that it is not easy to install tensioning devices on belt conveyors.

[0004] This utility model provides a mid-section tensioning device, including a slide and a slide guide rail. Tensioning bracket A and tensioning bracket B are provided at both ends of the slide guide rail. A threaded guide rod is provided between tensioning bracket A and tensioning bracket B. A redirecting roller A is installed on tensioning bracket A, and a redirecting roller B is provided on the slide. Tensioning bracket A and tensioning bracket B are installed on a belt conveyor and welded to the intermediate frame of the belt conveyor.

[0005] A further improvement is that the carriage guide rail is connected to the tension bracket A and tension bracket B by hexagonal head bolts, the hexagonal head bolts are fixed by nuts, and a channel steel washer, a round washer and a spring washer are provided between the hexagonal head bolts and the nuts.

[0006] A further improvement is that the redirecting roller A and redirecting roller B are also connected by hexagonal head bolts, and the hexagonal head bolts on redirecting roller A and redirecting roller B are fixed by double nuts. At the same time, the hexagonal head bolts and double nuts are also equipped with channel steel special washers and round washers.

[0007] A further improvement is that an adjusting screw is provided at one end of the carriage guide rail near the tension bracket B, and the installation position of the entire carriage guide rail can be adjusted by rotating the adjusting screw.

[0008] A further improvement is that a tensioning rod is provided on the tensioning bracket A, which ensures that there is a redundancy in the position of the redirecting roller A.

[0009] A further improvement is that the bottom sides of the tension brackets A and B are provided with welded protruding beams, which increase the welding strength.

[0010] The advantages of this utility model are as follows: When the belt height is low and other tensioning devices cannot be used due to process limitations, this tensioning device, connected via a threaded guide rod, ensures the stability of the entire structure. The threaded guide rod can be adjusted to control the appropriate tensioning stroke. There are no requirements for the installation location; it can be installed at any section of the belt. During design, there is no need to consider avoiding support legs; tensioning brackets A and B can be used as support legs. For very short belt conveyors, support legs can be omitted, and this tensioning device can be used directly as support legs. The structure is simple and the manufacturing cost is low. Assembly and disassembly are convenient. The tensioning bracket A, the slide rail, and the tensioning bracket B are all bolted together, making subsequent disassembly and replacement easier. The use of spring washers and double nuts reduces the impact of vibrations generated during operation on the frame, preventing loosening and making the overall structure more stable. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Among them: 1-slide carriage, 2-slide carriage guide rail, 3-tensioning bracket A, 4-tensioning bracket B, 5-threaded guide rod, 6-redirecting roller A, 7-redirecting roller B, 8-hexagonal head bolt, 9-nut, 10-channel steel special washer, 11-round washer, 12-spring washer, 13-double nut, 14-adjusting screw, 15-tensioning rod, 16-welded protruding beam. Detailed Implementation

[0013] To enhance understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are for illustrative purposes only and do not constitute a limitation on the scope of protection of this utility model.

[0014] like Figure 1 As shown, this embodiment provides a central tensioning device, including a slide 1 and a slide guide rail 2. Tensioning brackets A3 and B4 are provided at both ends of the slide guide rail 2. A threaded guide rod 5 is provided between tensioning brackets A3 and B4. A redirecting roller A6 is installed on tensioning bracket A3, and a redirecting roller B7 is provided on the slide 1. Tensioning brackets A3 and B4 are installed on a belt conveyor and welded to the intermediate frame of the belt conveyor. The slide guide rail 2 is connected to tensioning brackets A3 and B4 by hexagonal head bolts 8, which are fixed by nuts 9. A channel steel washer 10, a round washer 11, and a spring washer 12 are provided between the hexagonal head bolts 8 and the nuts 9. The redirecting rollers A6 and B7 are also connected by hexagonal head bolts 8, which are secured by double nuts 13. Both the hexagonal head bolts 8 and double nuts 13 are fitted with channel steel washers 10 and round washers 11. An adjusting screw 14 is located at the end of the carriage guide rail 2 near the tensioning bracket B4. Rotating the adjusting screw 14 adjusts the installation position of the entire carriage guide rail 2. A tensioning rod 15 is installed on the tensioning bracket A3 to ensure sufficient positional redundancy for the redirecting roller A6. Welded protruding beams 16 are provided on the bottom sides of the tensioning brackets A3 and B4 to increase welding strength.

[0015] Installation method: Install the carriage onto the carriage guide rail; then connect the carriage guide rail 2 (on which carriage 1 has been installed) to the tensioning bracket A3 and tensioning bracket B4 using hexagonal head bolts 8, nuts 9, channel steel special washers 10, round washers 11, and spring washers 12; then install the threaded guide rod 5 onto the assembled tensioning bracket A3 and tensioning bracket B4; next, connect the redirecting roller A6 and redirecting roller B7 using hexagonal head bolts 8, double nuts 13, channel steel special washers 10, and round washers 11; finally, place the tensioning bracket A3 and tensioning bracket B4 at any position on the belt conveyor and weld them to the intermediate frame of the belt conveyor to complete the installation and use. The appropriate tensioning stroke distance can be adjusted by adjusting the threaded guide rod 14 of the tensioning device.

Claims

1. A central tensioning device, characterized in that: Includes a carriage (1) and a carriage guide rail (2). The carriage guide rail (2) is provided with tension bracket A (3) and tension bracket B (4) at both ends. A threaded guide rod (5) is provided between the tension bracket A (3) and the tension bracket B (4). A redirecting roller A (6) is installed on the tension bracket A (3). A redirecting roller B (7) is provided on the carriage (1). The tension bracket A (3) and the tension bracket B (4) are installed on the belt conveyor and welded to the intermediate frame of the belt conveyor.

2. The central tensioning device as described in claim 1, characterized in that: The slide rail (2) is connected to the tension bracket A (3) and tension bracket B (4) by hexagonal head bolts (8), which are fixed by nuts (9). A channel steel special washer (10), a round washer (11) and a spring washer (12) are provided between the hexagonal head bolts (8) and the nuts (9).

3. The central tensioning device as described in claim 1, characterized in that: The redirecting roller A (6) and redirecting roller B (7) are also connected by hexagonal head bolts (8). The hexagonal head bolts (8) on redirecting roller A (6) and redirecting roller B (7) are fixed by double nuts (13). At the same time, the hexagonal head bolts (8) and double nuts (13) are also equipped with channel steel special washers (10) and round washers (11).

4. The central tensioning device as described in claim 1, characterized in that: The slide rail (2) is provided with an adjusting screw (14) at one end near the tension bracket B (4). The installation position of the entire slide rail (2) can be adjusted by rotating the adjusting screw (14).

5. A middle tensioning device as described in claim 1, characterized in that: The tensioning bracket A (3) is provided with a tensioning rod (15), which ensures that the position of the redirecting roller A (6) has redundancy.

6. The central tensioning device as described in claim 1, characterized in that: The bottom sides of the tension bracket A (3) and tension bracket B (4) are provided with welding protrusions (16), which increase the welding strength.

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