A hoist type conveyor belt automatic return device

Abstract

The application discloses a hoisting type conveying belt automatic returning device, which comprises a fixed frame, a rotary frame and a supporting roller mechanism, the fixed frame comprises a cross beam frame and two support frames symmetrically arranged at two ends of the cross beam frame, and the bottom of the support frame is fixedly connected with a field frame; the rotary frame comprises an adjusting beam frame and two hoisting frames symmetrically arranged at two ends of the adjusting beam frame; the middle part of the adjusting beam frame is rotationally connected with the middle part of the cross beam frame through a rotating assembly; the supporting roller mechanism comprises a straight roller assembly and two taper roller assemblies arranged at two sides of the straight roller assembly, and the outer side end parts of the two taper roller assemblies are fixedly connected with two sides of the rotary frame. The application provides a mechanical type automatic returning device applied to the hoisting type conveying belt, which can automatically adjust and correct in real time after the belt deviation, greatly reduces the daily workload of maintenance personnel, guarantees the safety of personnel, and can also realize interval adjustment of the height, length and supporting roller groove angle of the conveying belt automatic returning device, and can meet the application of various fields.

Description

Technical Field

[0001] This invention relates to the field of auxiliary devices for belt conveyors, and specifically to a suspended automatic return device for conveyor belts. Background Technology

[0002] Belt conveyors are widely used in the transportation of bulk materials in mining, docks, power, and chemical industries. During operation, belt misalignment is a very common production failure. If not detected and addressed promptly, it can lead to serious safety accidents such as belt tearing, material spillage, and personnel injuries. Therefore, preventing and handling belt misalignment is a crucial task for safe production.

[0003] In belt conveyors, the suspended frame type is a special type, mainly used in telescopic belt conveyors. Telescopic belt conveyors are mainly used for transporting raw coal in the roadway of coal mining faces or for transporting bulk materials or raw materials in roadways and tunnels.

[0004] Defects and shortcomings of existing technology:

[0005] Compared to ordinary fixed conveyor frames, suspended conveyor frames have the advantages of simple structure and easy disassembly and assembly. However, their belt running stability is poor. If belt deviation occurs during operation, the following adjustment methods are generally used: 1. Adjust the height of the rollers or the frame on both sides; 2. Adjust the angle of the suspended idler rollers; 3. Add vertical rollers on both sides of the conveyor belt, and force the belt back to the center through friction with the edge of the belt.

[0006] Currently available adjustment methods, such as adjusting the frame height and the angle of the suspended idlers, are time-consuming, labor-intensive, and difficult to operate. Adding vertical rollers can cause irreversible damage to the belt. Therefore, existing solutions do not offer a simple and reliable solution to the belt misalignment problem of suspended conveyor frames. Summary of the Invention

[0007] To address the problem of conveyor belt misalignment during operation in suspended conveyor frames, and to reduce manual intervention and belt damage during adjustments, this invention provides an automatic return device for suspended conveyor belts, which can automatically return the conveyor belt in a suspended conveyor frame to center after misalignment.

[0008] To achieve the above objectives, the present invention is specifically implemented through the following technical solutions:

[0009] An automatic return device for a suspended conveyor belt includes a fixed frame, a rotating frame, and an idler mechanism. The fixed frame includes a crossbeam and two support frames symmetrically installed at both ends of the crossbeam, with the bottom of the support frames fixedly connected to the on-site frame. The rotating frame includes an adjustable beam and two lifting frames symmetrically installed at both ends of the adjustable beam. The middle part of the adjustable beam is rotatably connected to the middle part of the crossbeam via a rotating assembly. The idler mechanism includes a straight roller assembly and two conical roller assemblies installed on both sides of the straight roller assembly, with the outer ends of the two conical roller assemblies fixedly connected to both sides of the rotating frame.

[0010] Furthermore, the rotating assembly includes a rotating shaft core disposed on the top surface of the middle part of the crossbeam frame and a shaft core sleeve fixedly installed on the adjusting beam frame. The shaft core sleeve is fitted onto the rotating shaft core, and a bearing is installed on the rotating shaft core.

[0011] Furthermore, symmetrical elongated holes are made on the adjusting beam frame, and the adjusting beam frame and the hoisting frame are connected through the elongated holes and bolts.

[0012] Furthermore, the hoisting frame is a two-section linkage structure, with the two sections fixed together by bolts.

[0013] Furthermore, an adjusting screw is vertically installed on one side of the support frame, and both ends of the crossbeam frame are connected to the support frame via adjusting screws.

[0014] Furthermore, transverse telescopic frames are installed at both ends of the crossbeam frame, and both ends of the crossbeam frame are connected to the support frame through the transverse telescopic frames.

[0015] Furthermore, the straight roller assembly includes a straight idler frame and two straight idlers mounted parallel to the straight idler frame.

[0016] Furthermore, the conical roller assembly includes a conical roller support frame and a conical roller mounted on the conical roller support frame; the diameter of the conical roller is narrower at the outer end and wider at the inner end.

[0017] Furthermore, the cone roller is a rubber cone roller.

[0018] Furthermore, one end of the two conical roller frames is connected to both ends of the straight roller assembly, and the other end is connected to the lifting frame.

[0019] This invention provides a mechanical automatic return device for suspended conveyor belts, which can automatically adjust the belt after it runs off track. It uses the friction between the idler roller and the belt to achieve automatic mechanical real-time correction of the conveyor belt. The device has a reasonable structure and a reliable adjustment method. It does not require human intervention or auxiliary power equipment, which greatly reduces the daily workload of maintenance personnel and lowers the failure rate of the equipment.

[0020] This invention utilizes the friction between the idler roller and the belt to achieve real-time correction of the conveyor belt, protecting the conveyor belt from edge wear. It solves the problems of the lag in traditional manual adjustment and vertical roller blocking adjustment, as well as the wear on the belt edges caused by rigidly blocking the belt edge with a stop roller or vertical roller to center it.

[0021] This invention can also realize the range adjustment of the height, length and idler trough angle of the automatic return device of the conveyor belt, which can meet various on-site applications. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the crossbeam frame in this invention;

[0024] Figure 3 This is a schematic diagram of the structure of the adjusting bracket in this invention;

[0025] Figure 4 This is a schematic diagram of the lifting frame in this invention;

[0026] Figure 5 This is a schematic diagram of the conical roller assembly in this invention;

[0027] Figure 6 This is a schematic diagram of the straight roller assembly in this invention;

[0028] Figure 7 This is a schematic diagram of the on-site installation of the present invention.

[0029] In the diagram, 1-fixed frame; 11-crossbeam frame; 111-lateral telescopic frame; 12-support frame; 121-adjusting screw; 2-rotating frame; 21-adjusting beam frame; 211-long slot; 22-lifting frame; 221-bolt shaft; 3-idler mechanism; 31-straight roller assembly; 311-straight idler frame; 312-straight idler; 32-conical roller assembly; 321-conical idler frame; 322-conical idler; 4-rotating assembly; 41-rotating shaft; 42-shaft sleeve; 43-locking bolt; 5-on-site frame; 6-conveyor belt. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0031] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0032] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0033] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] like Figures 1 to 7 As shown, the present invention provides a hoisting type automatic return device for conveyor belts, including a fixed frame 1, a rotating frame 2, and a roller mechanism 3. The fixed frame 1 includes a crossbeam frame 11 and two support frames 12 symmetrically installed at both ends of the crossbeam frame 11. The bottom of the support frames 12 is fixedly connected to the on-site frame 5.

[0036] The slewing frame 2 includes an adjusting beam frame 21 and two lifting frames 22 symmetrically installed at both ends of the adjusting beam frame 21; the middle part of the adjusting beam frame 21 is rotatably connected to the middle part of the crossbeam frame 11 through a rotating assembly 4.

[0037] The roller mechanism 3 includes a straight roller assembly 31 and two conical roller assemblies 32 installed on both sides of the straight roller assembly 31. The outer ends of the two conical roller assemblies 32 are fixedly connected to both sides of the rotary frame 2.

[0038] The fixed frame 1 is installed at the location determined according to the site conditions. It is then fixed to the on-site frame 5 of the suspended conveyor belt and locked in place at any position on the belt conveyor. The centerline of the rotating frame 2 is aligned with the centerline of the fixed frame 1 through the installation of the support frame 12. During normal operation of the conveyor belt 6, the idler roller mechanism 3 operates with balanced forces on both sides, providing drag force to the conveyor belt 6.

[0039] When the conveyor belt 6 shifts to one side during operation, the frictional force acting on the left and right idlers of the automatic return device changes. The frictional force of the conveyor belt 6 on the tapered roller assembly 32 on the shifted side increases, while the frictional force on the tapered roller assembly 32 on the other side decreases, causing the rotary frame 2 to oscillate at an angle along the belt's running direction. The rotatable idler mechanism 3 drives the rotary frame 2 to rotate towards the shifted side. When the rotary frame 2 forms a certain angle with the belt's running direction, the frictional force on the tapered idlers on the rotary frame 2 will act on the belt in the opposite direction. The idler mechanism 3 will generate a centering frictional force on the conveyor belt, causing the belt to run in the center.

[0040] In some embodiments, the rotating assembly 4 includes a rotating shaft core 41 disposed on the top surface of the middle part of the crossbeam frame 11 and a shaft core sleeve 42 fixedly mounted on the adjusting beam frame 21. The shaft core sleeve 42 is fitted onto the rotating shaft core 41 in the middle part of the crossbeam frame 11, and a bearing is installed on the rotating shaft core 41. The top of the shaft core sleeve 42 can be further secured vertically to the rotating shaft core 41 and the shaft core sleeve 42 with locking bolts 43 to prevent it from falling off. Thus, the fixed frame 1 and the rotating frame 2, which are symmetrically arranged, achieve rotation through the central rotating assembly 4. The operating angle of the rotating frame 2 can be flexibly rotated, facilitating rapid return when the conveyor belt 6 deviates.

[0041] In some embodiments, symmetrical elongated holes 211 are provided on the adjusting beam 21, and the adjusting beam 21 and the lifting frame 22 are connected by the elongated holes 211 and bolts. Further, the lifting frame 22 is a two-section linkage structure, with the two sections fixed in the middle by bolts 221. The two-section linkage structure of the lifting frame 22 can adjust the lateral extension, vertical drop distance, and installation angle with the idler roller mechanism 3. The installation position of the lifting frame 22 at the elongated holes 211 of the adjusting beam 21 can directly adjust the lateral installation distance of the idler roller mechanism 3, making it as close as possible to the conveyor belt; the angle between the conical roller assembly and the horizontal is adjustable within the range of 35° to 40°, ensuring that a certain tension is maintained between the idler roller mechanism 3 and the conveyor belt.

[0042] In some embodiments, an adjusting screw 121 is vertically installed on one side of the support frame 12, and both ends of the crossbeam frame 11 are connected to the support frame 12 via the adjusting screw 121. The support frame 12 may be a Z-shaped structure with a vertical middle section, used to ensure that the fixed frame 1 is parallel to the field frame 5. The adjusting screw 121 can adjust the overall height and levelness of the fixed frame 1. The height of the support frame 12 is adjusted by adjusting the adjusting screw 131 of the support frame 12, thereby adjusting the height of the rotary frame 2 so that its bottom idler roller mechanism 3 is in contact with the conveyor belt.

[0043] In some embodiments, transverse telescopic frames 111 are provided at both ends of the crossbeam frame 11, and both ends of the crossbeam frame 11 are connected to the support frame 12 through the transverse telescopic frames 111. The crossbeam frame 11 and the transverse telescopic frames 111 can be round or square tubes. One end of the transverse telescopic frame 111 can extend into the tube of the crossbeam frame 11 and be locked by at least four fastening screws. The transverse telescopic frame 111 is connected to the support frame 12 to realize the left and right adjustment of the crossbeam frame 11, ensuring the alignment of the fixed frame 1 with the hoisting and conveying field frame 5.

[0044] In some embodiments, the straight roller assembly 31 includes a straight idler frame 311 and two straight idlers 312 mounted parallel to the straight idler frame 311. In some embodiments, the tapered roller assembly 32 includes a tapered idler frame 321 and tapered idlers 322 mounted on the tapered idler frame 321; the tapered idlers 322 have a diameter that is thinner at the outer end and thicker at the inner end. The straight idlers 312 are steel straight rollers. The main function of the straight roller assembly 31 is to support the conveyor belt 6. The double straight roller design in the middle provides better stability for the suspended conveyor belt.

[0045] The conical roller 322 is a rubber conical roller. The bottom of the conical roller bracket 321, facing downwards, is connected to the straight roller assembly 31 via bolts, and the outer side, facing upwards, is connected to the lifting frame 22 via bolts. During the rotation of the conical roller 322 in contact with the belt, the difference in linear speed at both ends can generate a central pulling force on the belt. The conical roller 322's cylindrical shell is covered with a layer of natural rubber, which has low hardness and high friction, providing greater friction for the conical roller 322.

[0046] Furthermore, the two conical roller supports 321 of the conical roller assembly 32 are respectively connected to the two ends of the straight roller assembly, and the other end of the conical roller support 321 is connected to the lifting frame 22.

[0047] The product of this invention has a simple structure and high reliability, making it suitable for harsh working environments such as mines. It reduces belt misalignment and material spillage, avoiding material waste, saving economic costs, improving the operating environment, and meeting environmental protection requirements. It also reduces abnormal downtime caused by conveyor belt misalignment, improving production efficiency; reduces wear and tear on the conveyor belt and its structural components, extending their service life; and reduces the labor intensity of on-site personnel, reducing labor and time costs.

[0048] It can meet the following bandwidth requirements: B1000-B2400mm, and is suitable for conveyor belts with cold and hot vulcanized joints. It is suitable for belt speeds within 4.5m / s and working environment temperatures above -50℃.

[0049] The specific embodiments described in this invention are merely illustrative of the invention and are not intended to limit it. Those skilled in the art can make modifications to these embodiments without contributing any inventive step after reading this specification, but such modifications are protected by patent law as long as they fall within the scope of the claims of this invention.

Claims

1. A hoisting type automatic return device for conveyor belts, characterized in that, The machine includes a fixed frame (1), a rotary frame (2), and a roller mechanism (3). The fixed frame includes a crossbeam frame (11) and two support frames (12) symmetrically installed at both ends of the crossbeam frame. The bottom of the support frames is fixedly connected to the field frame (5). The rotary frame includes an adjusting beam frame (21) and two hoisting frames (22) symmetrically installed at both ends of the adjusting beam frame. The middle part of the adjusting beam frame is rotatably connected to the middle part of the crossbeam frame through a rotating assembly (4). The roller mechanism includes a straight roller assembly (31) and two conical roller assemblies (32) installed on both sides of the straight roller assembly. The outer ends of the two conical roller assemblies are fixedly connected to both sides of the rotary frame. The hoisting frame is a two-section linkage structure, with the two sections fixed in the middle by a bolt shaft (221); Symmetrical long slots (211) are made on the adjusting beam frame, and the adjusting beam frame and the hoisting frame are connected by long slots and bolts.

2. The automatic return device for hoisted conveyor belts according to claim 1, characterized in that, The rotating assembly includes a rotating shaft (41) disposed on the top surface of the middle part of the crossbeam frame and a shaft sleeve (42) fixedly installed on the adjusting beam frame. The shaft sleeve is fitted onto the rotating shaft, and a bearing is installed on the rotating shaft.

3. The automatic return device for hoisted conveyor belts according to claim 1, characterized in that, An adjusting screw (121) is vertically installed on one side of the support frame, and the two ends of the crossbeam frame are connected to the support frame through adjusting screws.

4. The automatic return device for hoisted conveyor belts according to claim 1, characterized in that, A transverse telescopic frame (111) is installed at both ends of the crossbeam frame, and the two ends of the crossbeam frame are connected to the support frame through the transverse telescopic frame.

5. The automatic return device for hoisted conveyor belts according to claim 1, characterized in that, The straight roller assembly includes a straight idler frame (311) and two straight idlers (312) mounted in parallel on the straight idler frame.

6. The automatic return device for hoisted conveyor belts according to claim 1, characterized in that, The conical roller assembly includes a conical roller holder (321) and a conical roller (322) mounted on the conical roller holder; the diameter of the conical roller is thinner at the outer end and thicker at the inner end.

7. The automatic return device for hoisted conveyor belts according to claim 6, characterized in that, The cone roller is a rubber cone roller.

8. The automatic return device for hoisted conveyor belts according to claim 6, characterized in that, One end of the two cone roller brackets is connected to both ends of the straight roller assembly, and the other end is connected to the hoisting frame.

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