Slow inclined type bridge starting section with coal cleaning device for reversed loader

By installing a coal cleaning component on the bridge section of the transfer machine, the safety issues caused by coal accumulation and the low efficiency of the transportation system were resolved, thereby improving both safety and production efficiency.

CN121553707APending Publication Date: 2026-02-24JIKAI HEBEI MECHATRONICS TECH CO LTD
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Patent Information

Application Number
CN202511677582.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-17
Publication Date
2026-02-24

AI Technical Summary

Technical Problem

Existing transfer machines are prone to material falling and coal accumulating in the suspended section, causing the roadway floor to become slippery, making equipment movement difficult and causing structural damage. In addition, frequent manual cleaning reduces the efficiency of the transportation system.

Method used

Design a gently inclined lifting section for a transfer machine, and install a coal cleaning assembly, including a fixed frame, support arm, shovel, and hydraulic cylinder. The shovel moves on the roadway floor to collect accumulated coal through hydraulic control. The detachable shovel structure, combined with a 2.5° included angle and low overlap height, reduces the power consumption of the equipment.

Benefits of technology

It improves equipment safety and production efficiency, reduces manual cleaning time, extends equipment lifespan, and lowers maintenance costs and failure rates.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of slowly-inclined type bridge starting sections with coal cleaning devices, and discloses a slowly-inclined type bridge starting section with a coal cleaning device for a reversed loader, first hydraulic cylinders are hinged to two first connecting seats, and second connecting seats are mounted on one sides of two second connecting plates; piston rods of the two first hydraulic cylinders are fixedly connected with mounting bases, the two mounting bases are hinged to the outer sides of the two second connecting bases correspondingly, and a fixing assembly is arranged between the two supporting arms. A piston rod of a second hydraulic cylinder is reset to drive a movable seat to move in a fixed shell, the movable seat can drive one end of a pull rod to move, a telescopic spring pushes a U-shaped seat to move, a limiting column moves in a fixed block, one end of the limiting column moves out of a limiting hole in an insertion block, the insertion block is released from limiting, and the U-shaped seat can move out of the fixed block. The operation is simple and quick, the whole device does not need to be replaced, and meanwhile, the effect of collecting the accumulated coal is improved.
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Description

Technical Field

[0001] This invention relates to the technical field of gently inclined bridge sections with coal cleaning devices, specifically a gently inclined bridge section with a coal cleaning device for a transfer machine. Background Technology

[0002] Transfer conveyors at tunneling faces are specialized machines used in mining engineering to unload materials from loading machinery and transfer them to mine cars or other transport equipment. The main types include belt conveyors, scraper conveyors, and bucket conveyors. They can be used in conjunction with loading machinery to reduce shunting time and improve tunneling efficiency. Belt conveyors are classified into four types according to their support method: supported, cantilever, suspended, and self-propelled. Scraper conveyors transport materials through scraper chains within the trough. Bucket conveyors consist of transfer buckets and a lifting vehicle.

[0003] The scraper conveyor in the roadway is a key piece of equipment connecting the scraper conveyor at the working face and the belt conveyor in the roadway. Due to factors such as structural design, the dynamic characteristics of material transfer, and the roadway operating environment, its suspended section is prone to material falling, causing coal accumulation on the roadway floor. Coal accumulation leads to slippery surfaces causing falls, floor deformation and damage causing difficulties in equipment movement, and structural damage, among other safety issues. Furthermore, coal accumulation is usually cleaned manually, and frequent cleaning reduces the overall production efficiency of the transportation system. Therefore, a gently sloping bridging section with a coal cleaning device is proposed for the transfer conveyor. Summary of the Invention

[0004] The purpose of this invention is to provide a gently inclined bridge section with a coal cleaning device for a transfer machine, in order to solve the safety problems mentioned in the background art, such as coal accumulation causing slippery ground and personnel to fall, deformation and damage to the bottom plate causing difficulty in moving equipment and structural damage, and the problem that coal accumulation is usually cleaned manually, which leads to a reduction in the production efficiency of the entire transportation system due to frequent cleaning.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a gently inclined bridge section with a coal cleaning device for a transfer conveyor, comprising... The main body of the transfer machine's lifting bridge section has an angle of 2.5° with the horizontal plane. A coal cleaning component is installed at the bottom of the main body of the transfer machine's lifting bridge section. The coal cleaning component is used to clean the coal accumulated on the transfer machine and the roadway floor. The coal cleaning assembly includes two fixed frames, two first connecting plates, and two second connecting plates. The two fixed frames are fixedly connected to the bottom of the transfer conveyor's bridge section body. The two first connecting plates and the two second connecting plates are respectively fixedly connected to the two fixed frames. Each of the two first connecting plates is equipped with a fixed seat. Each of the two fixed seats is hinged with a support arm. A shovel plate is installed at one end of each of the two support arms. Each of the tops of each of the two support arms is fixedly connected to a first connecting seat. Each of the two first connecting seats is hinged with a first hydraulic cylinder. Each of the two second connecting plates is equipped with a second connecting seat on one side. Each of the piston rods of the two first hydraulic cylinders is fixedly connected to a mounting seat. The two mounting seats are respectively hinged to the outside of the two second connecting seats. A fixing assembly is provided between the two support arms.

[0006] Preferably, the aforementioned fixing assembly includes a fixing housing, two fixing blocks, and two limiting posts. The fixing housing is fixedly connected to one inner end of the two support arms. The two fixing blocks are respectively fixedly connected to both inner ends of the fixing housing. One end of each of the two limiting posts movably passes through one side of the two fixing blocks. A U-shaped seat is fixedly connected to the opposite end of each of the two limiting posts. A pull rod is hinged inside each of the two U-shaped seats. A movable seat is hinged to the adjacent end of each of the two pull rods. A telescopic spring is movably sleeved on the outer side of each limiting post between the fixing block and the U-shaped seat. A driving assembly is provided on the fixing housing.

[0007] Preferably, one end of the aforementioned telescopic spring is fixedly connected to one side of the fixing block, and the other end of the telescopic spring is fixedly connected to one side of the U-shaped seat.

[0008] Preferably, the drive assembly described above includes a mounting plate and a second hydraulic cylinder. The mounting plate is mounted on one side of the fixed housing, and the second hydraulic cylinder is mounted on one side of the mounting plate. The piston rod of the second hydraulic cylinder passes through the interior of the fixed housing and is fixedly connected to one side of the movable seat.

[0009] Preferably, each of the two support arms has an insertion hole on one side, and the two insertion holes are matched with the two limiting posts, with the two limiting posts being movably inserted into the two insertion holes respectively.

[0010] Preferably, two insert blocks are fixedly connected to one side of the aforementioned shovel plate, and each of the two insert blocks has a limiting hole on one side.

[0011] Preferably, one end of each of the two support arms is provided with a slot, and the plug is matched with the slot and inserted into the slot.

[0012] Preferably, baffles are fixedly connected to both ends of one side of the shovel plate, and a positioning strip is fixedly connected to one side of the shovel plate between the two baffles.

[0013] Preferably, one end of each of the two support arms is provided with a positioning groove on the upper and lower sides of the slot, the positioning groove and the positioning strip are matched with each other, and the positioning strip is engaged inside the positioning groove.

[0014] Preferably, the aforementioned limiting hole and the limiting post are matched with each other, and the limiting post moves through the interior of the limiting hole.

[0015] Compared with the prior art, the present invention, employing the above technical solution, has the following technical effects: 1. This invention uses the extension of the piston rods of two first hydraulic cylinders to drive the other ends of two support arms to rotate inside the fixed seat, causing the two support arms to move the shovel downwards. The bottom of the shovel abuts against the floor of the roadway. By moving the transfer machine forward, the shovel moves on the floor of the roadway, which can collect accumulated coal, improve the safety of equipment use, and allow for manual periodic cleaning of accumulated coal on the shovel during equipment maintenance, making the roadway floor clean and flat, providing a good working environment for workers, reducing roadway cleaning time and improving production efficiency.

[0016] 2. This invention uses the piston rod of the second hydraulic cylinder to reset, thereby driving the movable seat to move inside the fixed housing. The movable seat can drive one end of the pull rod to move, and the telescopic spring pushes the U-shaped seat to move, so that the limiting post moves inside the fixed block. One end of the limiting post moves out of the limiting hole on the insert block, and the insert block is released from the limit. At this time, the shovel plate can be disassembled. The operation is simple and quick, and there is no need to replace the entire device. At the same time, it improves the coal collection effect.

[0017] 3. When installing the shovel plate, this invention supports the shovel plate by inserting two insert blocks into the slots and moving the positioning strip into the positioning groove, ensuring that the insertion hole and the limiting hole are on the same axis, thus improving the convenience of shovel plate installation. By extending the piston rod of the second hydraulic cylinder, the moving seat pushes the limiting post on the U-shaped seat to move through the two pull rods, so that one end of the limiting post passes through the interior of the limiting hole, thereby limiting the position of the insert blocks on the shovel plate, thus completing the installation of the shovel plate. The operation is simple and quick, saving time and effort, and improving maintenance efficiency.

[0018] 4. By setting the angle between the bridge section and the roadway horizontal plane to 2.5°, and with the low overlap height of the belt conveyor and the gentle slope, the power of the whole machine is reduced. Compared with the existing transfer machine with a bridge section angle of 8-12° and a machine height of more than 2m, which is too large, this device improves the service life of the chute, reduces maintenance costs and failure rate, and improves the versatility of the equipment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the main structure of the coal cleaning component of the present invention; Figure 3 This is a schematic diagram of the right side of the coal cleaning assembly of the present invention; Figure 4 This is a schematic diagram of the bottom structure of the coal cleaning assembly of the present invention; Figure 5 This is a schematic diagram of the internal structure of the fixed housing of the present invention; Figure 6 This is a schematic diagram of the insert structure of the present invention; Figure 7 This is a schematic cross-sectional view of the coal cleaning component of the present invention.

[0021] Explanation of reference numerals in the attached drawings: 1. Transfer conveyor bridge body; 2. Coal cleaning assembly; 21. Fixing frame; 22. First connecting plate; 23. Second connecting plate; 24. Fixing seat; 25. Support arm; 26. Shovel plate; 27. First connecting seat; 28. First hydraulic cylinder; 29. ​​Mounting seat; 210. Second connecting seat; 31. Fixing housing; 32. Fixing block; 33. Limiting post; 34. U-shaped seat; 35. Telescopic spring; 36. Pull rod; 37. Moving seat; 38. Insertion hole; 39. Mounting plate; 310. Second hydraulic cylinder; 41. Slot; 42. Insertion block; 43. Limiting hole; 51. Baffle; 52. Positioning strip; 53. Positioning groove. Detailed Implementation

[0022] 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.

[0023] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0024] Example Please see Figure 1-7 This invention provides a technical solution: a gently inclined bridging section with a coal cleaning device for a transfer conveyor, comprising a bridging section body 1, wherein the bridging section body 1 has an angle of 2.5° with the horizontal plane. By setting the bridging section to have an angle of 2.5° with the roadway horizontal plane, combined with the low overlap height of the belt conveyor and the gentle slope, the overall power of the machine is reduced. Compared with the existing transfer conveyor bridging section angle of 8-12° and the machine height of more than 2m, which is too large, this invention improves the service life of the chute, reduces maintenance costs and failure rate, and improves the versatility of the equipment. A coal cleaning component 2 is installed at the bottom of the bridging section body 1, which is used to clean the coal accumulated on the transfer conveyor and the roadway floor. By setting up the coal cleaning component 2, accumulated coal can be collected, improving the safety of equipment use. Furthermore, during equipment maintenance, coal can be periodically cleaned from the shovel plate 26 manually, resulting in a clean and flat roadway floor, providing a better working environment for workers, reducing roadway cleaning time, and increasing production efficiency. The coal cleaning component 2 includes two fixed frames 21, two first connecting plates 22, and two second connecting plates 23. The two fixed frames 21 are fixedly connected to the bottom of the transfer crane's lifting section body 1. The two first connecting plates 22 and two second connecting plates 23 are respectively fixedly connected to the two fixed frames 21. Each of the two first connecting plates 22 is equipped with a fixed seat 24, and each of the two fixed seats 24 is hinged with a support arm 25. One end of each support arm 25 is equipped with a... The top of the shovel plate 26 and the two support arms 25 are fixedly connected to the first connecting seats 27. The two first connecting seats 27 are hinged to the first hydraulic cylinders 28. The two second connecting plates 23 are each mounted on one side of the second connecting seats 210. The piston rods of the two first hydraulic cylinders 28 are fixedly connected to the mounting seats 29. The two mounting seats 29 are respectively hinged to the outside of the two second connecting seats 210. By extending the piston rods of the two first hydraulic cylinders 28, the other ends of the two support arms 25 are driven to rotate inside the fixed seats 24, so that the two support arms 25 drive the shovel plate 26 to move downward. The bottom of the shovel plate 26 abuts against the floor of the roadway. By moving the transfer machine forward, the shovel plate 26 moves on the floor of the roadway, which can collect the accumulated coal. A fixing component is set between the two support arms 25.

[0025] By setting a fixed assembly, the entire device does not need to be replaced, while improving the efficiency of coal collection. The fixed assembly includes a fixed housing 31, two fixed blocks 32, and two limiting posts 33. The fixed housing 31 is fixedly connected to one inner end of the two support arms 25. The two fixed blocks 32 are respectively fixedly connected to the two inner ends of the fixed housing 31. One end of each of the two limiting posts 33 movably passes through one side of the two fixed blocks 32. A U-shaped seat 34 is fixedly connected to the opposite end of each of the two limiting posts 33. A tie rod 36 is hinged inside each of the two U-shaped seats 34. Two pull rods 36 are hinged to adjacent ends with movable seats 37. A telescopic spring 35 is movably sleeved on the outer side of the limiting post 33 between the fixed block 32 and the U-shaped seat 34. The movable seat 37 moves inside the fixed housing 31, which can drive one end of the pull rod 36 to move. The telescopic spring 35 pushes the U-shaped seat 34 to move, so that the limiting post 33 moves inside the fixed block 32. One end of the limiting post 33 moves out of the limiting hole 43 on the insert block 42, and the insert block 42 is released from the limit. At this time, the shovel plate 26 can be disassembled. A drive assembly is provided on the fixed housing 31. One end of the telescopic spring 35 is fixedly connected to one side of the fixed block 32, and the other end of the telescopic spring 35 is fixedly connected to one side of the U-shaped seat 34. The telescopic spring 35 is a consumable part and needs to be replaced and maintained regularly. When the U-shaped seat 34 at the other end of the pull rod 36 is released, the telescopic spring 35 drives the U-shaped seat 34 to move, so that the limiting post 33 moves inside the fixed block 32, and one end of the limiting post 33 moves out of the limiting hole 43 on the insert block 42, and the insert block 42 is released from the limit.

[0026] For ease of device maintenance, the drive assembly includes a mounting plate 39 and a second hydraulic cylinder 310. The mounting plate 39 is mounted on one side of the fixed housing 31, and the second hydraulic cylinder 310 is mounted on one side of the mounting plate 39. The piston rod of the second hydraulic cylinder 310 passes through the interior of the fixed housing 31 and is fixedly connected to one side of the movable seat 37. The limiting hole 43 and the limiting post 33 are matched, and the limiting post 33 moves through the interior of the limiting hole 43. Each of the two support arms 25 has an insertion hole 38 on one side, and the two insertion holes 38 are matched with the two limiting posts 33. The two limiting posts 33 are respectively moved into the interior of the two insertion holes 38. The shovel plate 26... Two insert blocks 42 are fixedly connected to one side. Each insert block 42 has a limiting hole 43 on one side. One end of each of the two support arms 25 has a slot 41. The insert blocks 42 and the slots 41 are matched with each other and the insert blocks 42 are inserted into the slots 41. During installation, by inserting the two insert blocks 42 into the slots 41, the piston rod of the second hydraulic cylinder 310 is extended. The moving seat 37 pushes the limiting post 33 on the U-shaped seat 34 to move through the two pull rods 36, so that one end of the limiting post 33 passes through the limiting hole 43 and can limit the position of the insert blocks 42 on the shovel plate 26, thereby completing the installation of the shovel plate 26.

[0027] To improve the ease of installation of the shovel plate 26, baffles 51 are fixedly connected to both ends of one side of the shovel plate 26, and a positioning strip 52 is fixedly connected between the two baffles 51 on one side of the shovel plate 26. Positioning grooves 53 are opened on the upper and lower sides of the slot 41 at one end of the two support arms 25. The positioning grooves 53 and the positioning strips 52 match each other, and the positioning strips 52 are snapped into the inside of the positioning grooves 53. By inserting the two inserts 42 into the inside of the slot 41 and moving the positioning strips 52 into the inside of the positioning grooves 53, the shovel plate 26 can be supported, ensuring that the insertion hole 38 and the limiting hole 43 are on the same axis, thus improving the ease of installation of the shovel plate 26.

[0028] The working principle or structural principle is as follows: When the transfer machine moves forward, the solenoid valves of the two first hydraulic cylinders 28 are activated by the switch group. The piston rods of the two first hydraulic cylinders 28 extend and drive the other ends of the two support arms 25 to rotate inside the fixed seat 24. This causes the two support arms 25 to drive the shovel 26 to move downward. The bottom of the shovel 26 abuts against the floor of the roadway. As the transfer machine moves forward, the shovel 26 moves on the floor of the roadway, which can collect the accumulated coal. The accumulated coal on the shovel 26 can be manually cleaned periodically during equipment maintenance. Moreover, it makes the floor of the roadway clean and flat, providing a good working environment for workers, reducing roadway cleaning time and improving production efficiency.

[0029] When the worn shovel plate 26 needs to be replaced or maintained, the solenoid valve of the second hydraulic cylinder 310 is activated by controlling the switch group. The piston rod of the second hydraulic cylinder 310 is reset, thereby driving the moving seat 37 to move inside the fixed housing 31. The moving seat 37 can drive one end of the pull rod 36 to move. After the U-shaped seat 34 at the other end of the pull rod 36 is released, the telescopic spring 35 drives the U-shaped seat 34 to move, so that the limiting post 33 moves inside the fixed block 32. One end of the limiting post 33 moves out of the limiting hole 43 on the insert block 42, and the insert block 42 is released from the limit. At this time, the shovel plate 26 can be disassembled. The operation is simple and quick, and there is no need to replace the whole device. At the same time, the coal collection effect is improved. During installation, by inserting two insert blocks 42 into the slot 41 and simultaneously moving the positioning strip 52 into the positioning groove 53, the shovel plate 26 can be supported, ensuring that the insertion hole 38 and the limiting hole 43 are on the same axis, thus improving the ease of installation of the shovel plate 26. Then, the piston rod of the second hydraulic cylinder 310 extends to push the moving seat 37 to move, which in turn drives the two pull rods 36 to move, thereby pushing the limiting post 33 on the U-shaped seat 34 to move inside the fixed block 32, so that one end of the limiting post 33 passes through the inside of the limiting hole 43, which can limit the position of the insert block 42 on the shovel plate 26, thus completing the installation of the shovel plate 26. The operation is simple and quick, saving time and effort and improving maintenance efficiency.

[0030] Those skilled in the art will understand that the features described in the various embodiments and / or claims of the present invention can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention can be combined or combined in various ways without departing from the spirit and teachings of the present invention. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. A gently inclined bridge section with a coal cleaning device for a transfer conveyor, characterized in that, include The main body (1) of the transfer machine lifting section is at an angle of 2.5° with the horizontal plane. A coal cleaning component (2) is installed at the bottom of the main body (1) of the transfer machine lifting section. The coal cleaning component (2) is used to clean the coal accumulated on the transfer machine and the roadway floor. The coal cleaning assembly (2) includes two fixed frames (21), two first connecting plates (22), and two second connecting plates (23). The two fixed frames (21) are fixedly connected to the bottom of the transfer machine's bridge section body (1). The two first connecting plates (22) and the two second connecting plates (23) are respectively fixedly connected to the two fixed frames (21). Each of the two first connecting plates (22) is equipped with a fixed seat (24), and each of the two fixed seats (24) is hinged with a support arm (25). One end of the two arms (25) is equipped with a shovel plate (26), and the top of each of the two arms (25) is fixedly connected with a first connecting seat (27). Each of the two first connecting seats (27) is hinged with a first hydraulic cylinder (28). Each of the two second connecting plates (23) is equipped with a second connecting seat (210) on one side. The piston rods of the two first hydraulic cylinders (28) are fixedly connected with mounting seats (29). The two mounting seats (29) are respectively hinged to the outside of the two second connecting seats (210). A fixing component is provided between the two arms (25).

2. The gently sloping bridge section with a coal cleaning device for a transfer conveyor according to claim 1, characterized in that, The fixing assembly includes a fixing housing (31), two fixing blocks (32), and two limiting posts (33). The fixing housing (31) is fixedly connected to one end of the inner side of the two support arms (25). The two fixing blocks (32) are fixedly connected to the two ends of the inner side of the fixing housing (31). One end of each of the two limiting posts (33) is movably inserted through one side of the two fixing blocks (32). A U-shaped seat (34) is fixedly connected to the opposite end of each of the two limiting posts (33). A pull rod (36) is hinged inside each of the two U-shaped seats (34). A movable seat (37) is hinged to the adjacent end of each of the two pull rods (36). A telescopic spring (35) is movably sleeved on the outer side of the limiting post (33) between the fixing block (32) and the U-shaped seat (34). A driving assembly is provided on the fixing housing (31).

3. The gently sloping bridge section with a coal cleaning device for a transfer conveyor according to claim 2, characterized in that, One end of the telescopic spring (35) is fixedly connected to one side of the fixing block (32), and the other end of the telescopic spring (35) is fixedly connected to one side of the U-shaped seat (34).

4. The gently sloping bridge section with a coal cleaning device for a transfer conveyor according to claim 2, characterized in that, The drive assembly includes a mounting plate (39) and a second hydraulic cylinder (310). The mounting plate (39) is mounted on one side of the fixed housing (31), and the second hydraulic cylinder (310) is mounted on one side of the mounting plate (39). The piston rod of the second hydraulic cylinder (310) passes through the interior of the fixed housing (31) and is fixedly connected to one side of the movable seat (37).

5. A gently inclined bridge section with a coal cleaning device for a transfer conveyor according to claim 2, characterized in that, Each of the two support arms (25) has a socket (38) on one side. The two sockets (38) are matched with the two limiting posts (33), and the two limiting posts (33) are respectively inserted into the two sockets (38).

6. A gently inclined bridge section with a coal cleaning device for a transfer conveyor according to claim 2, characterized in that, Two inserts (42) are fixedly connected to one side of the shovel plate (26), and each of the two inserts (42) has a limit hole (43) on one side.

7. A gently inclined bridge section with a coal cleaning device for a transfer conveyor according to claim 6, characterized in that, One end of each of the two support arms (25) is provided with a slot (41), and the plug (42) matches the slot (41) and is inserted into the inside of the slot (41).

8. A gently inclined bridge section with a coal cleaning device for a transfer conveyor according to claim 6, characterized in that, Both ends of one side of the shovel plate (26) are fixedly connected to baffles (51), and a positioning strip (52) is fixedly connected between the two baffles (51) on one side of the shovel plate (26).

9. A gently inclined bridge section with a coal cleaning device for a transfer conveyor according to claim 8, characterized in that, One end of each of the two support arms (25) is provided with a positioning groove (53) on the upper and lower sides of the slot (41). The positioning groove (53) matches the positioning strip (52), and the positioning strip (52) is engaged inside the positioning groove (53).

10. A gently inclined bridge section with a coal cleaning device for a transfer conveyor according to claim 6, characterized in that, The limiting hole (43) and the limiting post (33) are matched with each other, and the limiting post (33) moves through the interior of the limiting hole (43).