Mining belt conveyor roller tensioning device

Abstract

The utility model discloses a mining belt conveyor roller tensioning device which comprises a folding roller and a tensioning roller, worm and gear mechanisms installed on a belt support drive the tensioning roller through a pull rod, the tensioning degree of a belt is conveniently and accurately adjusted, and the two worm and gear mechanisms can be synchronously adjusted by rotating a hand wheel. The tensioning roller is driven to move along the guide rail, so that the tensioning degree of the belt is changed; by means of the design, the operation process is simplified, the adjusting accuracy is improved, stable operation of the belt conveyor can be kept, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of conveying machinery, in particular to a mine belt conveyor roller tensioning device. Background Art

[0002] As an important equipment in the material conveying system of mines, ports, etc., the stable operation of mining belt conveyors is crucial to the continuity of the entire production process. In the use of belt conveyors, the role of the roller tensioning device cannot be ignored, which is directly related to the tension and operation stability of the belt. At present, most of the roller tensioning devices for mining belt conveyors on the market adopt fixed or simple mechanical adjustment methods. These devices are often unable to adjust the tension in time when facing dynamic changes such as material impact and belt expansion and contraction, resulting in excessive tension or relaxation of the belt. Excessive tension will not only increase the wear of the belt, but also increase the risk of belt damage when the material impacts; while belt relaxation may cause problems such as belt deviation and slippage, affecting the conveying efficiency and even causing safety accidents.

[0003] Therefore, it is necessary to propose a roller tensioning device with a simple structure and an effective buffer mechanism. Utility Model Content

[0004] The purpose of the utility model is to overcome the above technical deficiencies, propose a mining belt conveyor roller tensioning device, and solve the technical problems raised in the background technology.

[0005] In order to achieve the above technical objectives, the technical solution of the utility model provides a mining belt conveyor roller tensioning device, including: a folding roller and a tensioning roller, the folding roller is arranged on the belt bracket below the driven roller; a guide rail is arranged on the belt bracket above the folding roller, and the two ends of the tensioning roller are slidably arranged on the guide rail, the folding roller, the driven roller and the tensioning roller are arranged parallel to each other, and the belt passes through the driven roller and the folding roller in turn and then passes between the folding roller and the tensioning roller; a worm gear mechanism is arranged on the belt bracket, and a threaded hole is arranged on the worm shaft center of the worm gear mechanism, and a pull rod is arranged between the worm gear mechanism and the tensioning roller, one end of the pull rod is matched with the worm wheel thread of the worm gear mechanism, and the other end is connected to the tensioning roller.

[0006] Furthermore, the pull rod includes a clamping ring, a polygonal connecting rod, a buffer cylinder and a threaded rod. The clamping ring is arranged on the central axis of the tensioning roller, and the bottom of the buffer cylinder is provided with a polygonal through hole matching the polygonal connecting rod. One end of the polygonal connecting rod is connected to the clamping ring, and the other end passes through the polygonal through hole. A limiting nut is provided on one end of the polygonal connecting rod in the buffer cylinder, and a buffer spring is provided between the limiting nut and the bottom of the buffer cylinder. One end of the threaded rod is connected to the buffer cylinder, and the other end is threadedly connected to the worm wheel of the worm gear mechanism.

[0007] Furthermore, a pressure plate is arranged between the limiting nut and the buffer spring, and the diameter of the pressure plate is equal to the inner diameter of the buffer cylinder.

[0008] Furthermore, two worm gear mechanisms are arranged on the belt bracket, the worms of the two worm gear mechanisms are connected through a transmission shaft, and a hand wheel is arranged on the worm of one of the worm gear mechanisms.

[0009] Furthermore, bearings are arranged at both ends of the central axis of the tensioning roller, a bearing seat is arranged on the belt bracket, and both ends of the folding roller are arranged on the bearing seat.

[0010] Compared with the prior art, the beneficial effects of the utility model include:

[0011] 1. The utility model realizes convenient and precise adjustment of the belt tension by adopting a combination design of a worm gear mechanism and a pull rod. The two worm gear mechanisms can be adjusted synchronously by rotating the hand wheel to drive the tensioning roller to move along the guide rail, thereby changing the belt tension. This design not only simplifies the operation process, but also improves the accuracy of adjustment, helps to maintain the stable operation of the belt conveyor, and improves work efficiency.

[0012] 2. The utility model effectively reduces the risk of damage to the belt due to excessive tensioning through the synergistic effect of the buffer spring and the pressure plate. This buffer design not only extends the service life of the belt, but also improves the safety of the belt conveyor operation. At the same time, the self-locking characteristics of the worm gear mechanism enable the tensioning device to maintain a stable state after adjustment without the need for an additional locking mechanism, further enhancing the durability and reliability of the belt conveyor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a mining belt conveyor;

[0014] Figure 2 It is a schematic diagram of a mining belt conveyor roller tensioning device provided by the utility model;

[0015] Figure 3 The utility model is a schematic diagram of a pull rod of a mine belt conveyor roller tensioning device.

[0016] Figure 4 The utility model discloses a cross-sectional view of a pull rod of a mine belt conveyor roller tensioning device.

[0017] In the figure: belt bracket 1, folding roller 2, driven roller 3, guide rail 4, tensioning roller 5, pull rod 6, retaining ring 601, multi-faceted connecting rod 602, buffer cylinder 603, threaded rod 604, buffer spring 605, pressure plate 606, limit nut 607, bearing 7, belt 8, worm gear mechanism 9, handwheel 10, bearing seat 11, transmission shaft 12. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] Reference Figure 1 , Figure 2 The utility model provides a tensioning device for a mining belt conveyor drum, comprising a folding drum 2, a tensioning drum 5 and a worm gear mechanism 9. A bearing seat 11 is installed on a belt support 1 below a driven drum 3 of the belt conveyor, and both ends of the folding drum 2 are arranged on the bearing seat 11. The tensioning drum 5 is slidably arranged on the belt support 1 above the folding drum 2 through a guide rail 4 and is parallel to the folding drum 2 and the driven drum 3. The belt 8 passes around the driven drum 3 and the folding drum 2 in turn, and passes between the folding drum 2 and the tensioning drum 5. This layout enables the tensioning drum 5 to be pressed against the guide rail 4 by the belt 8, thereby maintaining a stable tensioning state. Bearings 7 are arranged at both ends of the central axis of the tensioning drum 5, so that it can reciprocate well on the guide rail 4.

[0020] There are two worm gear mechanisms 9, and the worms of the two are connected by a transmission shaft 12. By rotating the handwheel 10 on one of the worm gear mechanisms 9, the two worm gear mechanisms 9 can be adjusted synchronously. The worm wheel axis of the worm gear mechanism 9 is provided with a threaded hole, and a pull rod 6 is provided between the worm gear mechanism 9 and the tensioning roller 5; one end of the pull rod 6 cooperates with the worm wheel thread of the worm gear mechanism 9, and the other end is connected to the central axis of the tensioning roller 5. By rotating the handwheel 10 on one of the worm gear mechanisms 9, the two worm gear mechanisms 9 can be adjusted synchronously, driving the tensioning roller 5 to move closer to or away from the driven roller 3 along the guide rail 4, thereby realizing the tensioning of the belt 8.

[0021] In actual applications, in order to prevent materials from damaging the drive motor during loading, the drive roller connected to it is usually arranged at the discharge end of the belt conveyor; therefore, in the application scenario of lifting and conveying materials, the driven roller 3 is at the lower end of the belt conveyor, and the tensioning device is arranged near the driven roller 3, which is conducive to conveniently adjusting the tightness of the belt in this application scenario; at the same time, since the worm gear mechanism has the characteristic of self-locking, it is unnecessary to set a locking mechanism when using it to drive the tensioning roller 5, which further simplifies the structure of the entire tensioning device.

[0022] Reference Figure 3 , Figure 4 The pull rod 6 includes a plurality of parts such as a snap ring 601, a polygonal connecting rod 602, a buffer cylinder 603 and a threaded rod 604. The snap ring 601 is fixed on the central axis of the tensioning drum 5. One end of the polygonal connecting rod 602 is connected to the snap ring 601, and the other end passes through the polygonal through hole at the bottom of the buffer cylinder 603, and a limit nut 607 is provided inside the limit nut 607. A buffer spring 605 is installed between the limit nut 607 and the bottom of the buffer cylinder 603. This design enables the pull rod 6 to provide a certain buffer when it is impacted, thereby reducing the risk of damage to the belt due to excessive tensioning. One end of the threaded rod 604 is connected to the buffer cylinder 603, and the other end is threadedly connected to the worm wheel of the worm gear mechanism 9.

[0023] When the worm wheel of the worm gear mechanism 9 rotates, the threaded rod 604 moves axially therein. In order to prevent the buffer cylinder 603 from axially rotating when the worm wheel of the worm gear mechanism 9 rotates, a multi-faceted connecting rod 602 is used to connect it with the clamping ring 601; at the same time, in order to keep the multi-faceted connecting rod 602 coaxial with the buffer cylinder 603, a pressure plate 606 is specially arranged between the limit nut 607 and the buffer spring 605. The diameter of the pressure plate 606 is equal to the inner diameter of the buffer cylinder 603, thereby ensuring the telescopic movement of the multi-faceted connecting rod 602 in the buffer cylinder 603.

[0024] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A mining belt conveyor roller tensioning device, comprising: A folding roller, wherein the folding roller is arranged on a belt support below the driven roller; A tensioning roller, a guide rail is arranged on the belt support above the folding roller, two ends of the tensioning roller are slidably arranged on the guide rail, the folding roller, the driven roller and the tensioning roller are arranged parallel to each other, and the belt passes through the driven roller and the folding roller in sequence and then passes between the folding roller and the tensioning roller; It is characterized in that a worm gear mechanism is provided on the belt bracket, a threaded hole is provided at the worm wheel axis of the worm gear mechanism, a pull rod is provided between the worm gear mechanism and the tensioning roller, one end of the pull rod cooperates with the worm wheel thread of the worm gear mechanism, and the other end is connected to the tensioning roller.

2. The mining belt conveyor roller tensioning device according to claim 1, characterized in that: The pull rod includes a clamping ring, a polygonal connecting rod, a buffer cylinder and a threaded rod. The clamping ring is arranged on the central axis of the tensioning roller. The bottom of the buffer cylinder is arranged on a polygonal through hole matching the polygonal connecting rod. One end of the polygonal connecting rod is connected to the clamping ring, and the other end passes through the polygonal through hole. A limiting nut is arranged on one end of the polygonal connecting rod in the buffer cylinder, and a buffer spring is arranged between the limiting nut and the bottom of the buffer cylinder. One end of the threaded rod is connected to the buffer cylinder, and the other end is threadedly connected to the worm wheel of the worm gear mechanism.

3. The mining belt conveyor roller tensioning device according to claim 2, characterized in that: A pressure plate is arranged between the limiting nut and the buffer spring, and the diameter of the pressure plate is equal to the inner diameter of the buffer cylinder.

4. A mining belt conveyor roller tensioning device according to claim 2 or 3, characterized in that: The belt bracket is provided with two worm gear mechanisms, the worms of the two worm gear mechanisms are connected through a transmission shaft, and a hand wheel is provided on the worm of one of the worm gear mechanisms.

5. The mining belt conveyor roller tensioning device according to claim 4, characterized in that: Bearings are arranged at both ends of the central axis of the tensioning roller, a bearing seat is arranged on the belt bracket, and both ends of the folding roller are arranged on the bearing seat.

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