Variable taper self-adjusting deviation roller group of belt conveyor and belt conveyor

Abstract

A variable taper self-adjusting deviation roller set of a belt conveyor and the belt conveyor, comprising a roller frame, a middle roller, and an adjusting roller, the adjusting roller is symmetrically arranged on both sides of the middle roller; the adjusting roller comprises an inner cylinder, a roller body, a central shaft, an elastic element, and a support rod; the central shaft is built in the inner cylinder, and the two ends of the central shaft are rotationally fitted with the inner cylinder; the roller body comprises a plurality of roller ring plates which are evenly distributed along the circumference of the inner cylinder at equal intervals, the upper end of each roller ring plate is a free end, and the lower end is hingedly connected to the lower end of the inner cylinder; the number of support rods is consistent with the number of roller ring plates, and the lower end of each support rod is hingedly connected to the inner wall of the roller ring plate; the upper end of the elastic element is connected to the upper end of the inner cylinder, and the lower end is hingedly connected to the upper end of the support rod. When the conveying belt deviates to one side, the pressure on the roller body on the deviated side becomes larger, the pressure is transmitted to the support rod through the roller ring plate, and then the elastic element is compressed, finally forming a conical shape with a small outer diameter and a large inner diameter, and the rubber belt is returned to the normal position.

Description

Technical Field

[0001] This invention relates to the field of belt conveyor technology, and more particularly to a belt conveyor with variable taper self-adjusting idler roller assembly and belt conveyor. Background Technology

[0002] Currently, automatic belt alignment structures for belt conveyors include forward-inclined idlers, conical alignment idlers, and spiral idlers, all of which achieve alignment by applying reverse frictional force to the belt. Among these, the conical alignment idler is a key component in belt conveyors used for automatically correcting belt misalignment. Figure 1 As shown, its structure has a larger diameter at one end and a smaller diameter at the other, with a fixed taper at both ends. Because the conical adjusting idler body is conical, the linear velocity varies at different positions during rotation (higher at the larger diameter end). When the conveyor belt deviates towards the larger end of the conical idler, the linear velocity at that contact point is greater than the conveyor belt speed, generating a reverse frictional force that pushes the conveyor belt towards the center. Conversely, when it deviates towards the smaller end, a positive corrective force is generated. The corrective effect of the conical adjusting idler is affected by factors such as load, speed, and taper size, requiring reasonable design based on the working conditions. However, actual working conditions such as belt speed, conveying capacity, and material characteristics are constantly changing, making it difficult for existing fixed-taper idler bodies to achieve a reasonable match with the working conditions and obtain good results. Summary of the Invention

[0003] In order to solve the technical problems existing in the above-mentioned technologies, it is necessary to provide a belt conveyor with a variable taper self-adjusting idler group.

[0004] A belt conveyor with variable taper and self-aligning idler assembly includes an idler frame, an intermediate idler rotatably mounted on the idler frame, and an alignment idler, with the alignment idler symmetrically arranged on both sides of the intermediate idler.

[0005] The alignment roller includes an inner cylinder, a roller body, a central shaft, an elastic element, and a support rod;

[0006] The central shaft is coaxially embedded in the inner cylinder, and the two ends of the central shaft are adapted to rotate with the inner cylinder.

[0007] The roller body includes several roller ring plates that are evenly distributed at equal intervals along the circumference of the inner cylinder. The upper end of each roller ring plate is a free end, and the lower end is hinged to the lower end of the inner cylinder.

[0008] The number of support rods is the same as the number of roller plates, and the lower end of each support rod is hinged to the inner wall of the roller plate.

[0009] The elastic element is fitted onto the inner cylinder, with its upper end connected to the upper end of the inner cylinder and its lower end hinged to the upper end of the support rod.

[0010] When the conveyor belt deviates to one side, the pressure on the roller on the deviated side increases. The pressure is transmitted to the support rod through the roller ring plate, which in turn compresses the elastic element, causing the roller ring plate to rotate inward around one end of the hinge point. This eventually forms a conical shape with a small outer diameter and a large inner diameter. The difference in linear velocity and the change in friction generate a corrective force, thus returning the conveyor belt to its correct position.

[0011] Preferably, the inner cylinder is provided with bearing seats at both ends, which are rotatably connected to the two ends of the central shaft. The bearing seat at the lower end of the inner cylinder is hinged to the lower end of the roller plate, and the bearing seat at the upper end of the inner cylinder is not connected to the upper end of the roller plate.

[0012] Preferably, the bearing housing is provided with a sealing ring, a bearing, a retaining ring, an inner labyrinth seal, an outer labyrinth seal, a cover, and a protective cover, installed in sequence.

[0013] Preferably, an annular retaining edge is provided on the bearing seat located at the upper end of the inner cylinder.

[0014] Preferably, the roller plate is arc-shaped or V-shaped, and its radius of curvature matches the running trajectory of the conveyor belt to enhance the centering and guiding effect of the conveyor belt.

[0015] It is also necessary to provide a belt conveyor.

[0016] A belt conveyor includes the aforementioned belt conveyor tapered self-adjusting idler roller assembly.

[0017] Compared with the prior art, the variable taper self-aligning idler assembly for belt conveyors provided by the present invention includes an idler frame, an intermediate idler rotatably mounted on the idler frame, and an alignment idler symmetrically arranged on both sides of the intermediate idler. The alignment idler includes an inner cylinder, a roller body, a central shaft, an elastic element, and support rods. The central shaft is coaxially embedded in the inner cylinder, and its two ends are rotatably adapted to the inner cylinder. The roller body includes several roller ring plates evenly distributed at equal intervals along the circumference of the inner cylinder. The upper end of each roller ring plate is a free end, and its lower end is hinged to the lower end of the inner cylinder. The number of support rods is the same as the number of roller ring plates, and the lower end of each support rod is correspondingly hinged to the inner wall of the roller ring plate. The elastic element is fitted on the inner cylinder, with its upper end connected to the upper end of the inner cylinder and its lower end correspondingly hinged to the upper end of the support rod. When the conveyor belt deviates to one side, the pressure on the roller on the deviated side increases. This pressure is transmitted through the roller ring plate to the support rod, which in turn compresses the elastic element, causing the roller ring plate to rotate inward around one hinge point. This ultimately forms a conical shape with a smaller outer diameter and a larger inner diameter. The difference in linear velocity and changes in friction generate a corrective force, thus returning the belt to its correct position. During use, the taper can be infinitely adjusted according to the material being processed, ensuring a perfect match to the actual working conditions. This minimizes wear on the belt and idler rollers, extending their service life. Unlike traditional conical roller structures where rollers cannot be replaced after wear and failure, this invention allows for easy replacement of damaged rollers, resulting in low maintenance costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a roller assembly in the prior art.

[0020] Figure 2 This is a schematic diagram of the structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the alignment roller of the present invention.

[0022] Figure 4 For the present invention Figure 2 A schematic diagram of the cross-sectional structure of AA.

[0023] Figure 5 This is a schematic diagram of the structure of the present invention under the running state of deviation.

[0024] Figure 6 This is a schematic diagram of the structure of the central axis of the present invention.

[0025] Figure 7 This is a schematic diagram of one embodiment of the present invention.

[0026] Figure 8 This is a schematic diagram of the structure of the sleeve of the present invention.

[0027] In the diagram: Idler frame 01, intermediate idler 02, alignment idler 03, inner cylinder 31, roller body 32, central shaft 33, elastic element 34, support rod 35, roller ring plate 36, sleeve 37, rotating disk 38, connecting disk 39, bearing seat 04, sealing ring 05, bearing 06, retaining ring 07, labyrinth inner seal 08, labyrinth outer seal 09, cover 10, protective cover 20, annular side guard 30, conveyor belt 40. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0030] Please refer to Figures 2 to 6 In one embodiment, the present invention provides a belt conveyor tapered self-aligning idler group, including an idler frame 01, an intermediate idler 02 rotatably disposed on the idler frame 01, and an alignment idler 03, wherein the alignment idler 03 is symmetrically disposed on both sides of the intermediate idler 02.

[0031] The alignment roller 03 includes an inner cylinder 31, a roller body 32, a central shaft 33, an elastic element 34, and a support rod 35. The central shaft 33 is coaxially embedded in the inner cylinder 31, and its two ends are rotatably adapted to the inner cylinder 31. The roller body 32 includes several roller ring plates 36 evenly distributed along the circumference of the inner cylinder 31. The upper end of each roller ring plate 36 is a free end, and its lower end is hinged to the lower end of the inner cylinder 31. The gap width between adjacent roller ring plates 36 is 1-5mm; the gap is filled with polyurethane elastomer or silicone damping blocks, and the hardness of the damping blocks is Shore A 50-80. The number of support rods 35 is the same as the number of roller plates 36. The lower end of each support rod 35 is hinged to the inner wall of the roller plate 36. The upper end of the elastic element 34 is connected to the upper end of the inner cylinder 31 and is fitted onto the inner cylinder. The lower end of the elastic element 34 is hinged to the upper end of the support rod 35. When the conveyor belt deviates to one side, the pressure on the roller 32 on the deviated side increases. The pressure is transmitted to the support rods 35 through the roller plate 36, which in turn compresses the elastic element 34, causing the roller plate 36 to rotate inward around one hinge point. This ultimately forms a conical shape with a small outer diameter and a large inner diameter. The difference in linear velocity and the change in friction generate a corrective force, thus achieving belt straightening.

[0032] Of course, the gap between adjacent roller plates 36 can also be a wedge-shaped gap with a width gradient, where the inlet width W1 = 2 ± 0.5 mm and the outlet width W2 = 1 ± 0.2 mm. When the belt deviation Δ ≥ 10 mm, the wedge-shaped gap of the roller plates 36 can cause the corrective force F to increase non-linearly according to F = K·Δ³, where K = 0.5-1.2 N / mm³.

[0033] Specifically, the inner cylinder 31 is provided with bearing seats 04 at both ends, which are rotatably connected to the two ends of the central shaft 33. The bearing seat 04 at the lower end of 31 is hinged to the lower end of the roller plate 36, while the bearing seat 04 at the upper end of 31 is not connected to the upper end of the roller plate 36.

[0034] The bearing housing 04 contains, in sequence, a sealing ring 05, a bearing 06, a retaining ring 07, an inner labyrinth seal 08, an outer labyrinth seal 09, a cover 10, and a protective cover 20.

[0035] Specifically, an annular flange 30 is provided on the bearing seat 04 at the upper end of the inner cylinder 31 to prevent the conveyor belt from deviating beyond the preset range. The annular flange 30 has a height of 10-15mm, and its inner wall is covered with a rubber buffer layer with a Shore A hardness of 70-90.

[0036] Specifically, the roller plate 36 is arc-shaped or V-shaped, with its radius of curvature matching the conveyor belt's running trajectory to enhance the belt's centering and guiding effect. The radius of curvature R of the arc surface of the roller plate 36 satisfies: R = 0.8-1.2 times the conveyor belt width, and the arc surface is coated with a tungsten carbide coating through a thermal spraying process, with a coating thickness of 0.5-1.2mm. The arc radius of curvature R of the roller plate 36 and the conveyor belt width B satisfy the relationship: R = (0.9B)² / (8h) + h / 2, where h is the maximum allowable deviation of the conveyor belt, h = 50-150mm.

[0037] Please refer to Figure 7 , Figure 8 In one embodiment, the elastic element 34 can be implemented by a spring; the preload of the elastic element 34 is adjusted by a sleeve 37 threaded onto the central shaft 33. The axial position of the sleeve 37 on the central shaft 33 can be changed by screwing the sleeve 37, and the end of the elastic element 34 and the sleeve 37 can be connected by sliding along the circumference of the sleeve 37, which can avoid interference between the elastic element 34 and the sleeve 37 when the sleeve 37 rotates; when the position of the sleeve 37 changes, the compression of the spring can be changed by the sleeve 37.

[0038] The sleeve 37 has threads on its inner wall that fit the outer wall of the central shaft 33, allowing the sleeve 37 to be rotated to change its axial position on the central shaft 33. An annular groove is provided at the end of the sleeve 37, within which a rotating disk 38 is rotatably fitted. This groove allows the rotating disk 38 to rotate circumferentially along the groove, while also limiting its axial displacement. A connecting disk 39 is fixed to the end of the elastic element 34, allowing it to be fitted onto the central shaft 33. The connecting disk 39 can rotate circumferentially along the central shaft 33, and its installation is compatible with the rotating disk 38, secured with bolts for easy installation and disassembly.

[0039] In one embodiment, the present invention provides a belt conveyor including a belt conveyor tapered self-aligning idler assembly, the belt conveyor tapered self-aligning idler assembly being mounted on the frame of the belt conveyor.

[0040] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. Those skilled in the art will understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A self-adjusting idler group with variable taper for a belt conveyor, characterized in that: It includes a roller frame, an intermediate roller rotatably mounted on the roller frame, and an adjusting roller, with the adjusting roller symmetrically arranged on both sides of the intermediate roller; The alignment roller includes an inner cylinder, a roller body, a central shaft, an elastic element, and a support rod; The central shaft is coaxially embedded in the inner cylinder, and the two ends of the central shaft are adapted to rotate with the inner cylinder. The roller body includes several roller ring plates that are evenly distributed at equal intervals along the circumference of the inner cylinder. The upper end of each roller ring plate is a free end, and the lower end is hinged to the lower end of the inner cylinder. The number of support rods is the same as the number of roller plates, and the lower end of each support rod is hinged to the inner wall of the roller plate. The elastic element is fitted onto the inner cylinder, with its upper end connected to the upper end of the inner cylinder and its lower end hinged to the upper end of the support rod. When the conveyor belt deviates to one side, the pressure on the roller on the deviated side increases. The pressure is transmitted to the support rod through the roller ring plate, which in turn compresses the elastic element, causing the roller ring plate to rotate inward around one end of the hinge point. This eventually forms a conical shape with a small outer diameter and a large inner diameter. The difference in linear velocity and the change in friction generate a corrective force, thus returning the conveyor belt to its correct position.

2. The variable taper self-adjusting idler group for belt conveyors according to claim 1, characterized in that: The inner cylinder is provided with bearing seats at both ends, which are rotatably connected to the two ends of the central shaft. The bearing seat at the lower end of the inner cylinder is hinged to the lower end of the roller plate, while the bearing seat at the upper end of the inner cylinder is not connected to the upper end of the roller plate.

3. The variable taper self-adjusting idler group for belt conveyors according to claim 2, characterized in that: The bearing housing is sequentially equipped with a sealing ring, a bearing, a retaining ring, an inner labyrinth seal, an outer labyrinth seal, a cover, and a protective cover.

4. The variable taper self-adjusting idler group for belt conveyors according to claim 2, characterized in that: An annular retaining edge is provided on the bearing seat located at the upper end of the inner cylinder.

5. The variable taper self-adjusting idler group for belt conveyors according to claim 1, characterized in that: The roller plate is arc-shaped or V-shaped, and its radius of curvature matches the running trajectory of the conveyor belt to enhance the centering and guiding effect of the conveyor belt.

6. A belt conveyor, characterized in that: Includes the belt conveyor tapered self-adjusting idler group as described in any one of claims 1-5.

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