A carrier roller for a coal mine belt conveyor

Abstract

A kind of coal mine belt conveyor is provided with a carrier roller, including spindle, the carrier roller cylinder is rotatably sleeved on the spindle, a plurality of installation grooves are formed on the surface of carrier roller cylinder along the axial direction, a plurality of annular comb teeth are sleeved on the carrier roller cylinder, installation protrusions that are slidably matched with the installation grooves are arranged on the inner surface of comb teeth, positioning mechanism for pressing and fixing comb teeth on carrier roller cylinder is arranged on the side of comb teeth, the positioning seat includes two abutting positioning blocks, the internal cavity is communicated with two through holes that are opposite to the side wall of positioning seat and opposite direction, two limit blocks corresponding with the through hole are movably arranged in the internal cavity, limit bolt is threadedly connected on the positioning seat, reset spring extending along the length direction of through hole is further connected between positioning block and limit block.The utility model aims at improving the problem that fixed-pitch comb-shaped carrier roller cannot well adapt to complex and changeable industrial production conveying task.

Description

Technical Field

[0001] This utility model relates to the field of belt conveyor idler technology, specifically an idler for a coal mine belt conveyor. Background Technology

[0002] In coal mining and transportation, belt conveyors are crucial continuous transport equipment. However, when conveying raw coal with high moisture content, viscous coal dust easily adheres to the conveyor belt surface. This not only leads to belt misalignment and accelerated wear but also causes equipment downtime and safety hazards due to material accumulation, seriously affecting the efficient and safe production of coal mines. Therefore, comb-shaped idlers are typically installed on the underside of the conveyor belt for cleaning. These idlers, resembling a comb in shape, continuously scrape and clean the conveyor belt surface during operation through their arranged teeth, effectively removing adhering material and ensuring the continuous and efficient operation of the belt conveyor.

[0003] The tooth spacing is a crucial parameter in the design of comb-shaped idlers. This parameter is primarily limited by the characteristics of the conveyed material (viscosity, moisture, and particle size). Only a tooth spacing that matches the material characteristics can achieve the ideal cleaning effect and prevent material blockage. However, most existing comb-shaped idlers have a fixed tooth spacing structure (such as the patent with publication number CN205687066U). Due to the complex and varied conveying tasks in industrial production, even on the same production line, the characteristics of the material may frequently change due to changes in its source or process. Once the material characteristics deviate from the fixed tooth spacing designed for the comb-shaped idler, its cleaning effect will significantly decrease. Utility Model Content

[0004] The present invention aims to provide a roller for a coal mine belt conveyor to improve the problem that fixed-gap comb rollers cannot adapt well to complex and ever-changing industrial production conveying tasks.

[0005] To solve the above technical problems, the specific solution adopted by this utility model is as follows: It includes a main shaft, on which a roller is rotatably sleeved. Several mounting grooves are axially formed on the surface of the roller. Multiple annular comb teeth are sleeved on the roller. The inner ring surface of the comb teeth is provided with mounting protrusions that slide in cooperation with the mounting grooves. A positioning mechanism is provided on the side of the comb teeth for pressing and fixing the comb teeth onto the roller. The positioning mechanism includes a positioning seat, which includes two mutually abutting positioning blocks. The two positioning blocks form an internal cavity after abutting. The internal cavity is connected to two through holes extending to the side wall of the positioning seat and in opposite directions. Two limiting blocks corresponding to the through holes are movably arranged in the internal cavity. Limiting bolts are threaded onto the positioning seat. During rotation, the limiting bolts can move between the two limiting blocks and push the two limiting blocks out of the through holes one by one. After being pushed out, the limiting blocks can make tight contact with the side wall of the mounting groove to achieve pressing and positioning of the comb teeth. A return spring extending along the length of the through hole is also connected between the positioning blocks and the limiting blocks.

[0006] As a further optimization of idlers for coal mine belt conveyors: the mounting groove is set as a rectangular groove or a dovetail groove.

[0007] As a further optimization of the idler roller for a coal mine belt conveyor: the limiting block is fixedly connected to a contact block, and the two contact blocks are arranged opposite each other. During the rotation of the limiting bolt, it can enter between the two contact blocks and push the contact blocks to move towards the through hole.

[0008] As a further optimization of the idler roller for a coal mine belt conveyor: the end of the limit bolt is provided with a tapered tip, the effect of which is to allow the limit bolt to be squeezed between the two contact blocks.

[0009] As a further optimization of the idler roller for coal mine belt conveyors: the contact block is provided with inclined surfaces, the two inclined surfaces are arranged opposite each other, and a V-shaped gap is formed between the two inclined surfaces, so that the conical tip can enter the V-shaped gap during the rotation of the limit bolt.

[0010] As a further optimization of idler rollers for coal mine belt conveyors: multiple return springs are provided and evenly arranged around the circumference of the limit block to ensure that the limit block is subjected to balanced force during the reset process and does not become skewed.

[0011] As a further optimization of idler rollers for coal mine belt conveyors: the end sections of the two limit blocks that contact the inner wall of the mounting groove are both semi-circular.

[0012] As a further optimization of idler rollers for coal mine belt conveyors: the mounting protrusions are integrated with the comb teeth.

[0013] As a further optimization of the idler roller for coal mine belt conveyors: the side wall of the mounting groove is provided with multiple limit insertion holes that can cooperate with the limit block.

[0014] Beneficial Effects: This invention involves fitting comb teeth onto the surface of the idler roller. Through the cooperation of the mounting groove and mounting protrusions, the comb teeth are allowed to move only axially within the idler roller. When the comb teeth reach the target position, the limiting bolts of the positioning mechanism on the side of the comb teeth are tightened, pushing the two limiting blocks out of the through holes and pressing against the side wall of the mounting groove, thereby achieving the clamping and positioning of the comb teeth. When it is necessary to adjust the comb tooth spacing, the limiting bolts are loosened, and the limiting blocks lose their pressure on the side wall of the mounting groove under the action of the return spring. At this time, the comb teeth are adjusted to the predetermined position on the mounting groove, and the limiting bolts are tightened again for clamping and positioning. The idler roller of this invention allows for quick and easy adjustment of the comb tooth spacing according to actual working conditions, improving the problem that fixed-spacing comb-shaped idler rollers cannot effectively adapt to complex and ever-changing industrial production conveying tasks. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the idler roller of this utility model; Figure 2 This is a schematic diagram of the idler roller of this utility model; Figure 3 This is a schematic diagram of the comb teeth of this utility model; Figure 4 This is a schematic diagram of the positioning mechanism of this utility model; Figure 5 This is a cross-sectional view of the positioning mechanism of this utility model; The markings in the diagram are: 1. Bearing, 2. Idler roller, 3. Comb teeth, 4. Sealing device, 5. Main shaft, 6. Mounting protrusion, 7. Positioning mechanism, 8. Mounting groove, 9. Positioning seat, 10. Limiting block, 11. Through hole, 12. Positioning block, 13. Limiting bolt, 14. Conical tip, 15. Inclined surface, 16. Contact block, 17. Limiting insertion hole, 18. Cavity, 19. Return spring. Detailed Implementation

[0016] like Figure 1 As shown, a type of idler roller for a coal mine belt conveyor includes a main shaft 5, which is the core support shaft of the idler roller structure. A bearing 1 is sleeved on the outside of the main shaft 5, connecting the main shaft 5 and the idler roller cylinder 2, and is the main component for realizing the rotation of the idler roller cylinder 2. A sealing device 4 is provided at the end of the bearing 1, which prevents dust, moisture, and other contaminants from entering the bearing 1, thus extending the service life of the idler roller. The idler roller cylinder 2 is sleeved on the outside of the bearing 1, serving as the mounting base for comb teeth 3. Multiple annular comb teeth 3 are sleeved on the idler roller cylinder 2, and the comb teeth 3 structure is used to peel off sticky materials adhering to the surface of the belt conveyor. The main shaft 5, bearing 1, and sealing device 4 described above are all existing technologies.

[0017] like Figure 2 and Figure 3 As shown, the surface of the idler roller 2 is provided with several mounting grooves 8 along the axial direction. The design of multiple grooves distributes the load of the comb teeth 3, improving the strength and working stability of the idler roller 2. The present invention has four mounting grooves 8. The inner ring surface of the comb teeth 3 is provided with mounting protrusions 6 that slide with the mounting grooves 8. The cooperation between the mounting grooves 8 and the mounting protrusions 6 restricts the comb teeth 3 to move only along the axial direction of the idler roller 2, preventing the comb teeth 3 from rotating during operation. The side of the comb teeth 3 is provided with a positioning mechanism 7, which presses and fixes the comb teeth 3 on the idler roller 2, preventing the comb teeth 3 from moving during operation.

[0018] The mounting groove 8 is configured as a rectangular groove or a dovetail groove. The rectangular groove or dovetail groove not only provides a certain guiding accuracy, limiting the comb teeth 3 to axial movement only and preventing rotation, but also has the characteristic of being easy to manufacture, improving the practicality of the device. In this embodiment, a rectangular groove is used. The side wall of the mounting groove 8 has multiple limiting insertion holes 17 that can cooperate with the limiting block 10. After the limiting block 10 is pushed out from the through hole 11, its end is inserted into the limiting insertion hole 17, improving the positioning stability of the limiting block 10.

[0019] Both sides of the comb tooth 3 are provided with positioning mechanisms 7 for pressing and fixing the comb tooth 3 onto the idler roller 2. The positioning mechanisms 7 on both sides can provide symmetrical pressing force for the comb tooth 3, preventing the comb tooth 3 from tilting or loosening, and increasing the reliability of fixing. The mounting protrusion 6 is integrated with the comb tooth 3. The integrated connection design avoids connection point failure and improves the overall structure.

[0020] like Figure 4 As shown, the positioning mechanism 7 includes a positioning seat 9, which includes two mating positioning blocks 12. The two positioning blocks 12 form an internal cavity 18 after mating, which is used to accommodate the limiting block 10. The modular design facilitates production and maintenance. The two positioning blocks 12 are mated by bolts, which provide a reliable connection and facilitate assembly, disassembly, and maintenance.

[0021] like Figure 5 As shown, the internal cavity 18 is connected to two through holes 11 that extend to the side wall of the positioning seat 9 and are in opposite directions. Two limiting blocks 10 corresponding to the through holes 11 are movably disposed in the internal cavity 18. When the comb tooth 3 is in an unpositioned state, the two limiting blocks 10 are in contact with each other in the cavity 18 and cannot provide frictional force to hinder the displacement of the comb tooth 3. When the comb tooth 3 is in a positioned state, the two limiting blocks 10 are pushed out and tightly pressed against the inner wall of the mounting groove 8 to achieve the pressing and fixing of the comb tooth 3.

[0022] The positioning seat 9 is threaded with a limiting bolt 13. During the rotation of the limiting bolt 13, it can move between the two limiting blocks 10 and push the two limiting blocks 10 out of the through hole 11 one by one. After the limiting blocks 10 are pushed out, they can make close contact with the side wall of the mounting groove 8 to achieve the pressing and positioning of the comb teeth 3. By tightening or loosening the limiting bolt 13, the friction between the limiting blocks 10 and the mounting groove 8 can be adjusted, thereby adjusting the spacing of the comb teeth 3.

[0023] The end section of the limiting block 10 that contacts the inner wall of the mounting groove 8 is semi-circular. Due to unavoidable errors during processing and assembly, if planar contact or conical contact is used, even a small error will cause the limiting block to only have a single line on the edge of the plane or an inclined conical angle in contact with the mounting groove 8, which can easily lead to huge stress concentration and damage to the limiting block 10, and the clamping force is unstable. The semi-circular end design can form a stable contact point between the limiting block 10 and the mounting groove 8, avoiding jamming or excessive local wear caused by small deviations.

[0024] A reset spring 19 extending along the length of the through hole 11 is also connected between the limiting block 10 and the positioning block 12. When the limiting bolt 13 is loosened, the reset spring 19 is used to restore the two limiting blocks 10 to the cavity 18 to release the restriction on the inner wall of the mounting groove 8. Multiple reset springs 19 are provided and are evenly arranged around the circumference of the limiting block 10 to ensure that the limiting block 10 is subjected to balanced force during the reset process and does not become skewed.

[0025] The limiting block 10 is fixedly connected to a contact block 16, and the two contact blocks 16 are arranged opposite to each other. During the rotation of the limiting bolt 13, it can enter between the two contact blocks 16 and push the contact blocks 16 to move towards the through hole 11. The contact block 16 is the contact medium between the limiting block 10 and the limiting bolt 13. The contact block 16 prevents the rotational friction of the limiting bolt 13 from damaging the limiting block 10.

[0026] The end of the limiting bolt 13 is provided with a tapered tip 14. The effect of the tapered tip 14 is to allow the limiting bolt 13 to be squeezed between the two contact blocks 16, thereby improving the operation performance of the positioning mechanism 7. The contact blocks 16 are provided with inclined surfaces 15. The two inclined surfaces 15 are arranged opposite each other, and a V-shaped gap is formed between the two inclined surfaces 15. The V-shaped gap guides the tapered tip 14 to enter between the contact blocks 16 during the rotation of the limiting bolt 13, further improving the operation performance of the positioning mechanism 7.

[0027] The method of using the idler roller for a coal mine belt conveyor according to this utility model is as follows: When it is necessary to adjust the spacing of the comb teeth, first loosen the limiting bolts 13 of the positioning mechanism 7 on both sides of the comb teeth 3. After the bolts are loosened, the pressure at the ends of the two limiting blocks 10 is released and they separate from the inner wall of the mounting groove 8 under the action of the return spring 19, thereby releasing the lock on the comb teeth 3. At this time, the operator can appropriately add or reduce the number of comb teeth 3 and adjust the spacing of the comb teeth 3 according to the actual situation. After the comb teeth 3 are moved to the target position, tighten the limiting bolts 13. The screwing in of the limiting bolts 13 pushes the two limiting blocks 10 out of the cavity 18, so that they tightly press against the side wall of the mounting groove 8. The friction between the limiting blocks 10 and the mounting groove 8 realizes the pressing and locking of the comb teeth 3, thereby quickly completing the process of adjusting the spacing of the comb teeth of the comb roller. If the comb teeth 3 are damaged during long-term operation, they should be replaced in the same way.

Claims

1. A type of idler roller for a coal mine belt conveyor, characterized in that: The main shaft (5) is rotatably mounted on the main shaft (5). The roller cylinder (2) has several mounting grooves (8) axially opened on its surface. The roller cylinder (2) is fitted with multiple annular comb teeth (3). The inner ring surface of the comb teeth (3) is provided with mounting protrusions (6) that slide with the mounting grooves (8). The side of the comb teeth (3) is provided with a positioning mechanism (7) for pressing and fixing the comb teeth (3) onto the roller cylinder (2). The positioning mechanism (7) includes a positioning seat (9). The positioning seat (9) includes two positioning blocks (12) that abut against each other. The two positioning blocks (12) form an internal cavity (18) after abutting. The internal cavity (18) is connected to two through-holes. The positioning seat (9) has a through hole (11) on its side wall and opposite direction. Two limit blocks (10) corresponding to the through hole (11) are movable in the internal cavity (18). The positioning seat (9) is threaded with a limit bolt (13). During the rotation of the limit bolt (13), it can move between the two limit blocks (10) and push the two limit blocks (10) out of the through hole (11) one by one. After the limit blocks (10) are pushed out, they can make close contact with the side wall of the mounting groove (8) to achieve the pressing and positioning of the comb teeth (3). The positioning block (12) and the limit block (10) are also connected by a return spring (19) extending along the length direction of the through hole (11).

2. The idler roller for a coal mine belt conveyor as described in claim 1, characterized in that: The mounting slot (8) is set as a rectangular slot or a dovetail slot.

3. The idler roller for a coal mine belt conveyor as described in claim 1, characterized in that: The limiting block (10) is fixedly connected to a contact block (16), and the two contact blocks (16) are arranged opposite to each other. During the rotation of the limiting bolt (13), it can enter between the two contact blocks (16) and push the contact blocks (16) to move towards the through hole (11).

4. The idler roller for a coal mine belt conveyor as described in claim 3, characterized in that: The end of the limiting bolt (13) is provided with a tapered tip (14), which is designed to allow the limiting bolt (13) to be squeezed between the two contact blocks (16).

5. The idler roller for a coal mine belt conveyor as described in claim 4, characterized in that: An inclined surface (15) is provided on the contact block (16). The two inclined surfaces (15) are arranged opposite each other, and a V-shaped gap is formed between the two inclined surfaces (15). During the rotation of the limiting bolt (13), the conical tip (14) can enter the V-shaped gap.

6. The idler roller for a coal mine belt conveyor as described in claim 1, characterized in that: Multiple reset springs (19) are provided and are evenly arranged around the circumference of the limit block (10) to ensure that the limit block (10) is subjected to balanced force during the reset process and does not become skewed.

7. The idler roller for a coal mine belt conveyor as described in claim 1, characterized in that: The end sections of the two limiting blocks (10) that contact the inner wall of the mounting groove (8) are both semi-circular.

8. The idler roller for a coal mine belt conveyor as described in claim 1, characterized in that: The mounting protrusion (6) is integrated with the comb teeth (3).

9. The idler roller for a coal mine belt conveyor as described in claim 1, characterized in that: The side wall of the mounting slot (8) is provided with multiple limiting holes (17) that can cooperate with the limiting block (10).

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