Taper-variable self-deviation-adjusting carrier roller set of belt conveyor and belt conveyor

Abstract

The taper-variable self-deviation-adjusting carrier roller set comprises a carrier roller frame, a middle carrier roller and deviation-adjusting carrier rollers, and the deviation-adjusting carrier rollers are symmetrically arranged on the two sides of the middle carrier roller. The deviation adjusting carrier roller comprises an inner barrel, a roller body, a center shaft, an elastic piece and a supporting rod. The central shaft is arranged in the inner cylinder body, and the two end parts of the central shaft are rotationally matched with the inner cylinder body; the roller body comprises a plurality of roller ring plates evenly distributed in the circumferential direction of the inner cylinder at equal intervals, the upper end of each roller ring plate is a free end, and the lower end of each roller ring plate is hinged to the lower end of the inner cylinder. The number of the supporting rods is consistent with that of the roller ring plates, and the lower end of each supporting rod is hinged to the inner wall of the corresponding roller ring plate; the upper end of the elastic piece is connected to the upper end of the inner cylinder, and the lower end is hinged to the upper end of the supporting rod. When the conveying belt deviates towards one side, the pressure borne by the roller body on the deviating side is increased, the pressure is transmitted to the supporting rods through the roller ring plates, then the elastic pieces are compressed, finally, a conical shape with the small outer ring diameter and the large inner side diameter is formed, and rubber belt returning is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of belt conveyors, and particularly to a belt conveyor taper variable self-aligning idler set and a belt conveyor. Background Art

[0002] At present, the mechanical automatic alignment structures of belt conveyors include forward-tilted idlers, conical alignment idlers, spiral idlers, etc., all of which achieve alignment by applying a reverse frictional force to the belt. Among them, the conical alignment idler is a key component for automatically correcting the deviation of the conveyor belt in a belt conveyor. As Figure 1 shown, one end of its structure has a larger diameter and the other end has a smaller diameter, and the taper at both ends is fixed and unchanged. Since the roller body of the conical alignment idler is conical, the linear velocities at different positions are different when the idler rotates (the linear velocity is higher at the larger diameter). When the conveyor belt deviates towards the larger end of the conical idler, the linear velocity of the contact point on this side is greater than the velocity of the conveyor belt, generating a reverse frictional force to push the conveyor belt towards the center; conversely, when it deviates towards the smaller end, a positive alignment force is generated. The alignment effect of the conical alignment idler is affected by factors such as load, speed, and taper size, and needs to be reasonably designed according to the working conditions. However, the actual working conditions such as belt speed, conveying capacity, and material characteristics are all variable. It is difficult for the existing roller body with a fixed taper to reasonably match the working conditions and achieve good results. Summary of the Invention

[0003] In order to solve the technical problems existing in the above technology, in view of this, it is necessary to provide a belt conveyor taper variable self-aligning idler set.

[0004] A belt conveyor taper variable self-aligning idler set includes an idler frame, an intermediate idler rotatably arranged on the idler frame, and alignment idlers symmetrically arranged on both sides of the intermediate idler; The alignment idler includes an inner cylinder, a roller body, a central shaft, an elastic member, and a support rod; The central shaft is coaxially disposed inside the inner cylinder, and both ends of the central shaft are rotationally adapted to the inner cylinder; The roller body includes a plurality of 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 the lower end is hinged to the lower end of the inner cylinder; The number of the support rods is the same as the number of the 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 member is sleeved on the inner cylinder. The upper end of the elastic member is connected to the upper end of the inner cylinder, and the lower end of the elastic member is correspondingly hinged to the upper end of the support rod; When the conveyor belt runs off to one side, the pressure on the roller body on the side where the belt runs off increases. The pressure is transmitted to the support rod through the roller ring plate, and then compresses the elastic member, causing the roller ring plate to rotate inward around one end hinge point, and finally forming a conical shape with a smaller outer diameter and a larger inner diameter. The deviation correction force is generated through the linear velocity difference and the change in friction force to realize the straightening of the rubber belt.

[0005] Preferably, bearing seats rotatably connected to the two ends of the central axis are provided at the two ends of the inner cylinder body. The bearing seat at the lower end of the inner cylinder body is hinged to the lower end of the roller ring plate, and the bearing seat at the upper end of the inner cylinder body is not connected to the upper end of the roller ring plate.

[0006] Preferably, a sealing ring, a bearing, a retaining ring, an inner labyrinth seal, an outer labyrinth seal, a cover, and a protective cover are sequentially installed in the bearing seat.

[0007] Preferably, an annular rib is provided on the bearing seat at the upper end of the inner cylinder body.

[0008] Preferably, the shape of the roller ring plate is arc-shaped or V-shaped, and its radius of curvature matches the running track of the belt to enhance the centering guiding effect of the belt.

[0009] It is also necessary to provide a belt conveyor.

[0010] A belt conveyor includes the taper-variable self-aligning idler group of the belt conveyor described above.

[0011] Compared with the prior art, the taper-variable self-aligning idler group for belt conveyors provided by the present invention includes an idler frame, an intermediate idler rotatably arranged on the idler frame, and aligning idlers symmetrically arranged on both sides of the intermediate idler; the aligning idlers include an inner cylinder, a roller body, a central shaft, an elastic member, and a support rod; the central shaft is coaxially arranged inside the inner cylinder, and both ends of the central shaft are rotationally adapted to the inner cylinder; the roller body includes a plurality of 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 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 ring plates, and the lower end of each support rod is correspondingly hinged to the inner wall of the roller ring plate; the elastic member is sleeved on the inner cylinder, the upper end of the elastic member is connected to the upper end of the inner cylinder, and the lower end of the elastic member is correspondingly hinged to the upper end of the support rod. When the conveyor belt runs off to one side, the pressure on the roller body on the side of the deviation becomes larger, and the pressure is transmitted to the support rod through the roller ring plate, thereby compressing the elastic member, causing the roller ring plate to rotate inward around one end hinge point, and finally forming a conical shape with a small outer diameter and a large inner diameter. Through the linear velocity difference and friction force change, a deviation-correcting force is generated to achieve the straightening of the rubber belt. During use, the taper can be adjusted steplessly according to the material, so that the taper perfectly matches the actual working conditions, minimizing the wear of the belt and the roller body of the idler, and improving the service life. For the conical aligning idler structure, when the roller body is worn out and fails, it cannot be replaced and is scrapped entirely. However, in the present invention, even if the roller body is damaged due to long-term use, the roller body can be replaced at any time, and the later maintenance cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 FIG. is a schematic structural diagram of an idler group in the prior art.

[0014] Figure 2 FIG. is a schematic structural diagram of the present invention.

[0015] Figure 3 FIG. is a schematic structural diagram of the aligning idler of the present invention.

[0016] Figure 4 For the present invention Figure 2 FIG. is a schematic cross-sectional structural diagram of A-A in the present invention.

[0017] Figure 5 FIG. is a schematic structural diagram of the present invention in the running state with deviation.

[0018] Figure 6 FIG. is a schematic structural diagram of the central shaft of the present invention.

[0019] Figure 7 It is a schematic structural diagram of one embodiment of the present invention.

[0020] Figure 8 It is a schematic structural diagram of the sleeve of the present invention.

[0021] In the figure: idler support 01, intermediate idler 02, self-aligning idler 03, inner cylinder 31, roller body 32, central shaft 33, elastic member 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 seal 08, outer labyrinth seal 09, cover 10, protective cover 20, annular rib 30, conveyor belt 40. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower", etc. indicating the orientation or position relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0024] Please refer to Figures 2 to 6 , in one embodiment, the present invention provides a taper-variable self-aligning idler group for a belt conveyor, including an idler support 01, an intermediate idler 02 and a self-aligning idler 03 rotatably provided on the idler support 01, and the self-aligning idler 03 is symmetrically arranged on both sides of the intermediate idler 02; Among them, the deviation-adjusting idler 03 includes an inner cylinder body 31, a roller body 32, a central shaft 33, an elastic member 34, and a support rod 35; the central shaft 33 is coaxially disposed inside the inner cylinder body 31, and the two ends of the central shaft 33 are rotationally adapted to the inner cylinder body 31. The roller body 32 includes a plurality of roller ring plates 36 evenly distributed at equal intervals along the circumferential direction of the inner cylinder body 31. The upper end of each roller ring plate 36 is a free end, and the lower end is hinged to the lower end of the inner cylinder body 31. The gap width between adjacent roller ring plates 36 is 1-5 mm; the gap is filled with a polyurethane elastomer or a silica gel damping block, and the hardness of the damping block is Shore A 50-80. The number of support rods 35 is the same as the number of roller ring plates 36. The lower end of each support rod 35 is correspondingly hinged to the inner wall of the roller ring plate 36; the upper end of the elastic member 34 is connected to the upper end of the inner cylinder body 31. The elastic member 34 is sleeved on the inner cylinder body, and the lower end of the elastic member 34 is correspondingly hinged to the upper end of the support rod 35. When the conveyor belt runs off to one side, the pressure on the roller body 32 on the side where the belt runs off becomes larger. The pressure is transmitted to the support rod 35 through the roller ring plate 36, and then the elastic member 34 is compressed, causing the roller ring plate 36 to rotate inward around one end hinge point, and finally forming a conical shape with a small outer diameter and a large inner diameter. Through the linear velocity difference and the change of friction force, a deviation-correcting force is generated to realize the straightening of the rubber belt.

[0025] Of course, the gap between adjacent roller ring plates 36 can also be a wedge-shaped gap with a gradient change in width. The width of the gap inlet is W 1 =2 ± 0.5 mm, and the width of the outlet is W 2 =1 ± 0.2 mm. Among them, when the deviation amount Δ of the belt ≥ 10 mm, the wedge-shaped gap of the roller ring plate 36 can cause the deviation-correcting force F to increase non-linearly according to F = K·Δ³, where K = 0.5-1.2 N / mm³.

[0026] Specifically, bearing seats 04 for rotatably connecting with the two ends of the central shaft 33 are arranged at the two ends of the inner cylinder body 31. The bearing seat 04 located at the lower end of 31 is hinged to the lower end of the roller ring plate 36, and the bearing seat 04 located at the upper end of 31 is not connected to the upper end of the roller ring plate 36.

[0027] Among them, a sealing ring 05, a bearing 06, a retaining ring 07, a labyrinth seal 08, a labyrinth outer seal 09, a cover 10, and a protective cover 20 are sequentially installed in the bearing seat 04.

[0028] Specifically, an annular rib 30 is arranged on the bearing seat 04 located at the upper end of the inner cylinder body 31 for preventing the belt from running off beyond the preset range. The height of the annular rib 30 is 10-15 mm, and the inner wall of the annular rib 30 is covered with a rubber buffer layer, and the hardness of the rubber is Shore A 70-90.

[0029] Specifically, the shape of the roller ring plate 36 is arc-shaped or V-shaped, and its radius of curvature matches the running track of the tape to enhance the effect of guiding the tape to the center. The arc curvature radius R of the roller ring plate 36 satisfies: R = 0.8 - 1.2 times the tape width, and the arc surface is coated with a tungsten carbide coating by thermal spraying process, and the coating thickness is 0.5 - 1.2 mm. The arc curvature radius R of the roller ring plate 36 and the tape width B satisfy the relational expression: R = (0.9B)² / (8h) + h / 2, where h is the maximum allowable deviation of the tape, and h = 50 - 150 mm.

[0030] Please refer to Figure 7 、 Figure 8 , in an embodiment, the elastic member 34 can be selected as a spring to implement; the pre-tightening force of the elastic member 34 is adjusted by a sleeve 37 threadedly sleeved on the central shaft 33. By screwing the sleeve 37, the axial position of the sleeve 37 on the central shaft 33 can be changed, and the end of the elastic member 34 and the sleeve 37 can be connected in a manner of circumferential sliding along the sleeve 37, which can avoid interference between the elastic member 34 and the sleeve 37 when the sleeve 37 rotates; when the position of the sleeve 37 changes, the compression amount of the spring can be changed through the sleeve 37.

[0031] Among them, threads adapted to the outer wall of the central shaft 33 can be provided on the inner wall of the sleeve 37 to facilitate rotating the sleeve 37 to change its axial position on the central shaft 33; an annular groove is provided at the end of the sleeve 37, and a rotating disk 38 is rotatably sleeved in the groove, so that the rotating disk 38 can rotate circumferentially along the groove and the axial displacement of the rotating disk can be restricted by the groove. A connecting disk 39 that can be sleeved on the central shaft 33 is fixed at the end of the elastic member 34. The connecting disk 39 can rotate circumferentially along the central shaft 33, and the connecting disk 39 and the rotating disk 38 are adaptively installed, and can be realized by bolt fastening, which is convenient for installation and disassembly.

[0032] In an embodiment, the present invention provides a belt conveyor, including the taper variable self-aligning idler group of the belt conveyor, and the taper variable self-aligning idler group of the belt conveyor is installed on the frame of the belt conveyor.

[0033] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A belt conveyor with variable taper and self-adjusting roller assembly, characterized in that: It includes a roller frame, an intermediate roller rotatably arranged on the roller frame, and an offset adjustment roller, wherein the offset adjustment roller is symmetrically arranged on both sides of the intermediate roller; The deflection adjustment roller comprises an inner cylinder, a roller body, a central axis, an elastic member, and a support rod; The central shaft is coaxially built into the inner cylinder, and the two ends of the central shaft are rotatably adapted to the inner cylinder; The roller body comprises a plurality of roller ring plates which are evenly spaced along the circumference of the inner cylinder body, 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 body; The number of the support rods is consistent with the number of the roller plate, and the lower end of each support rod is correspondingly hinged to the inner wall of the roller plate; The elastic member is sleeved on the inner cylinder, the upper end of the elastic member is connected to the upper end of the inner cylinder, and the lower end of the elastic member is 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, and the pressure is transmitted to the support rod through the roller plate, which in turn compresses the elastic part, causing the roller plate to rotate inward around one end hinge point, eventually forming a conical shape with a small outer diameter and a large inner diameter. The deviation correction force is generated through the linear speed difference and the change in friction force, so that the belt can be returned to the correct position.

2. The belt conveyor tapered self-adjusting roller assembly according to claim 1 is characterized in that: The two ends of the inner cylinder are provided with bearing seats rotatably connected to the two ends of the central axis. The bearing seat located at the lower end of the inner cylinder is hinged to the lower end of the roller plate, and the bearing seat located at the upper end of the inner cylinder is not connected to the upper end of the roller plate.

3. The belt conveyor tapered self-adjusting roller assembly according to claim 2 is characterized in that: The bearing seat is provided with a sealing ring, a bearing, a retaining ring, a labyrinth inner seal, a labyrinth outer seal, a cover and a protective cover in sequence.

4. The belt conveyor tapered self-adjusting roller assembly according to claim 2 is characterized in that: An annular rib is arranged on the bearing seat at the upper end of the inner cylinder.

5. The belt conveyor tapered self-adjusting roller assembly according to claim 1 is characterized in that: The shape of the roller plate is arc-shaped or V-shaped, and its curvature radius matches the running track of the belt to enhance the centering guiding effect of the belt.

6. A belt conveyor, characterized in that: The invention comprises the belt conveyor tapered variable self-adjusting idler roller group as described in any one of claims 1 to 5.

Images