Reciprocating type return stroke cleaning device

Abstract

The invention discloses a reciprocating type return stroke cleaning device which comprises a machine head and a machine tail of a belt conveyor, a conveying belt is arranged in the belt conveyor, a collecting chute is arranged under the conveying belt, a scraper trolley for scraping return stroke falling materials is arranged in the collecting chute, and the scraper trolley can reciprocate in the collecting chute through a driving mechanism. A scraper is arranged on the outer side of the scraper trolley, an arc-shaped slope is arranged on the outer side of the scraper, a plurality of groups of parallel mounting grooves are formed in the bottom of the scraper, the mounting grooves are inclined and are formed in the length direction of the scraper, and a floating scraper is arranged in each mounting groove; according to the reciprocating type return stroke cleaning device, scattered materials and return stroke belt materials can be collected and conveyed, the collected materials can be cleaned and scraped at regular time, the field environment is guaranteed, meanwhile, accumulation and waste of the materials at the bottom of the return stroke can be avoided, and the reciprocating type return stroke cleaning device is suitable for application and popularization.

Description

Technical Field

[0001] The invention relates to the technical field of coal transportation, and in particular to a reciprocating return cleaning device. Background Art

[0002] The coal industry is improving mining efficiency through intelligent, clean, green and digital technologies, while reducing the impact on the environment and improving safety performance. Therefore, it is important to reduce labor intensity, improve work efficiency and maintain environmental hygiene at the conveyor site.

[0003] In the coal transportation industry, many conveyor users are troubled by the cleaning of spilled wet materials, powders, granules and other small materials. Although a first / second sweeper is set at the head roller of the conveyor, there are still a lot of fallen materials at the bottom of the return belt. If they are not cleaned, it will cause accumulation and overflow of materials at the bottom of the conveyor return belt, which will be particularly difficult to clean later and will also cause material waste.

[0004] In the existing technology, the problems of return material and accumulated material on the conveyor are still cleaned manually. Manual cleaning is not only labor-intensive and consumes high manpower costs, but also cannot effectively ensure the environmental sanitation of the conveyor site. Therefore, there is an urgent need for a device that can automatically and reciprocally clean the return material. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned problems and provide a reciprocating return cleaning device which can collect and transport spilled materials and return materials, and can regularly clean and scrape the collected materials to ensure the on-site environment, while also being able to avoid accumulation and waste of materials at the bottom of the return journey.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: a reciprocating return cleaning device, comprising a head and a tail of a belt conveyor, a conveyor belt is arranged in the belt conveyor, a collecting chute is arranged directly below the conveyor belt, a scraper trolley for scraping off the return material is arranged in the collecting chute, the scraper trolley can reciprocate in the collecting chute through a driving mechanism, a scraper is arranged on the outside of the scraper trolley, an arc-shaped slope is arranged on the outside of the scraper, a plurality of groups of mounting grooves arranged parallel to each other are arranged at the bottom of the scraper, the mounting grooves are inclined and arranged along the length direction of the scraper, and a floating scraper is arranged in each of the mounting grooves.

[0007] Preferably, the floating scraper extends out of the bottom surface of the scraper under normal conditions, and the bottom surface of the floating scraper contacts the surface of the collecting chute when scraping off the falling materials; the extension lengths of the multiple floating scrapers gradually increase from the outside to the inside.

[0008] Preferably, the floating scraper includes a plurality of lifting plates spliced ​​together, a slide groove is provided on one side of the lifting plate, and a slider matching the slide groove is provided on the other side, and every two adjacent lifting plates are spliced ​​together through the slide groove and the slider, and a plurality of compression springs are provided on the surface of the lifting plate, and the bottom of the compression spring is fixed on the surface of the lifting plate, and the top of the compression spring is fixed on the inner top surface of the mounting groove.

[0009] Preferably, the collecting chute is U-shaped, the bottom surface of the collecting chute is a carbon steel trough body, the surface of the carbon steel trough body is provided with a wear-resistant lining, the wear-resistant lining is a polymer polyethylene plate, and slideway grooves for the movement of the scraper trolley are fixedly provided on both sides of the collecting chute.

[0010] Preferably, the slide trough is arranged along the length direction of the collecting chute, a trapezoidal wedge block is provided at the bottom opening of the slide trough, a rear roller groove is provided on the inner side of the trapezoidal wedge block, and a limiting groove is provided on the inner wall of the slide trough along its own length direction.

[0011] Preferably, the scraper trolley also includes a frame, a traction rod is provided at one end of the frame, and an extension rod is provided at the other end, the scraper is fixed to the end of the extension rod, two rolling wheels are provided on each side of the frame, an anti-skewness wheel is provided between the two rolling wheels, the rolling wheel cooperates with the cross-section of the roller groove, and the anti-skewness wheel cooperates with the cross-section of the limit groove.

[0012] Preferably, the traction rod includes a fixing frame integrally arranged at the end, the outer surface of the fixing frame is provided with a through hole for the wire rope to pass through, the fixing frame is provided with a roller, the end of the fixing frame is provided with a first bending hole, one end of the first bending hole faces the fixing frame, and the other end is vertically upward, a U-shaped screw is provided at the end of the traction rod, both ends of the U-shaped screw extend toward the fixing frame, the U-shaped screw is provided with a through hole that penetrates the traction rod on the side away from the fixing frame, and a tightening bolt is provided on the outside of the traction rod, and the tightening bolt corresponds to the through hole on the traction rod.

[0013] Preferably, a second bending hole is further provided at the end of the middle cross beam of the frame, one end of the second bending hole faces the scraper and the other end opens upward, and a tightening bolt is further provided on the outer side of the middle cross beam.

[0014] Preferably, the scraper trolley is connected to a driving mechanism via a steel wire rope, the steel wire rope is turned via turning wheels at four corners, and a plurality of supporting wheels are provided below the steel wire rope.

[0015] Preferably, a movable rod is provided in the middle cross beam of the traction trolley, and both ends of the movable rod are provided with fixed frames connected to the wire rope. The extension rod is hinged to the scraper, and the scraper and the movable rod are hinged through a hinged connecting rod. When the movable rod moves in the middle cross beam, it drives the scraper to flip and lift through the hinged connecting rod.

[0016] The present invention discloses a reciprocating return cleaning device, comprising a head and a tail of a belt conveyor, wherein a conveying belt is arranged in the belt conveyor, a collecting chute is arranged directly below the conveying belt, a scraper trolley for scraping off falling materials on the return journey is arranged in the collecting chute, the scraper trolley can reciprocate in the collecting chute through a driving mechanism, a scraper is arranged on the outer side of the scraper trolley, an arc-shaped slope is arranged on the outer side of the scraper, a plurality of groups of mounting grooves arranged parallel to each other are arranged at the bottom of the scraper, the mounting grooves are inclined and arranged along the length direction of the scraper, and a floating scraper is arranged in each of the mounting grooves; compared with the prior art, the reciprocating return cleaning device has the function of collecting and conveying spilled materials and return materials, and can regularly clean and scrape the collected materials to ensure the on-site environment, while also having the beneficial effect of avoiding accumulation and waste of materials at the bottom of the return journey. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the reciprocating return cleaning device of the present invention.

[0018] Figure 2 It is a schematic diagram of reciprocating cleaning in the reciprocating return cleaning device of the present invention.

[0019] Figure 3 It is a schematic diagram of the structure of the collecting chute in the reciprocating return cleaning device of the present invention.

[0020] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0021] Figure 5 It is a schematic diagram of the structure of the driving mechanism in the reciprocating return cleaning device of the present invention.

[0022] Figure 6 The structure of the scraper trolley in the reciprocating return cleaning device of the present invention is shown in FIG. Figure 1 .

[0023] Figure 7 The structure of the scraper trolley in the reciprocating return cleaning device of the present invention is shown in FIG. Figure 2 .

[0024] Figure 8 The structure of the scraper trolley in the reciprocating return cleaning device of the present invention is shown in FIG. Figure 3 .

[0025] Fig. 9 For the present invention Figure 6 Schematic diagram of the enlarged structure at point B in the middle.

[0026] Fig.10 For the present invention Figure 8 Schematic diagram of the enlarged structure at point C in the middle.

[0027] Fig.11 It is a schematic diagram of the structure of the floating scraper in the reciprocating return cleaning device of the present invention.

[0028] Fig.12 It is a schematic diagram of the structure of the lifting plate in the reciprocating return cleaning device of the present invention.

[0029] Fig.13 It is a schematic structural diagram of the second embodiment of the reciprocating return cleaning device of the present invention.

[0030] Fig.14 It is a schematic structural diagram of the third embodiment of the reciprocating return cleaning device of the present invention.

[0031] In the figure: 1. head; 2. tail; 3. conveyor belt; 4. collecting chute; 41. carbon steel trough; 42. wear-resistant lining; 43. slideway groove; 431. trapezoidal wedge; 432. roller groove; 433. limit groove; 5. scraper trolley; 51. frame; 52. fixing frame; 521. through hole; 522. roller; 523. first bending hole; 524. U-shaped screw; 525. tightening bolt; 53. anti-deviation wheel; 54. rolling wheel; 55. extension rod; 56. scraper; 561. arc slope; 562. mounting groove; 563. floating scraper; 5631. lifting plate; 5632. slide groove; 5633. slider; 5634. compression spring; 57. second bending hole; 6. driving mechanism; 7. wire rope; 71. corner wheel; 72. supporting wheel. DETAILED DESCRIPTION

[0032] The present invention will now be described in further detail with reference to the accompanying drawings. The accompanying drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and thus only show the components related to the present invention.

[0033] Please refer to Figure 1-2The reciprocating return cleaning device comprises a head 1 and a tail 2 of a belt conveyor, a conveying belt 3 is arranged in the belt conveyor, a collecting chute 4 is arranged directly below the conveying belt 3, wherein the width of the collecting chute 4 is greater than the width of the conveying belt 3, and the materials carried by the conveying belt 3 on the return journey can be better received, and a scraper trolley 5 for scraping off the falling materials on the return journey is arranged in the collecting chute 4, and the scraper trolley 5 can reciprocate in the collecting chute 4 through a driving mechanism 6, and a scraper 56 is arranged on the outer side of the scraper trolley 5, wherein the width of the scraper 56 is greater than the width of the conveying belt 3, and the collecting chute 4 ... The width of the collecting chute 4 is consistent; when in use, the conveyor belt 3 rotates in the return direction when the belt conveyor is running, and the transported bulk material or the falling material at the bottom of the return journey finally falls into the collecting chute 4. At this time, the scraper trolley 5 moves and scrapes and cleans the accumulated materials through the scraper 56. The outer side of the scraper 56 is provided with an arc slope 561, and the bottom of the scraper 56 is provided with a plurality of groups of mounting grooves 562 arranged parallel to each other. The mounting grooves 562 are inclined and arranged along the length direction of the scraper 56, and each of the mounting grooves 562 is provided with a floating scraper 563.

[0034] Since a plurality of floating scrapers 563 are provided at the bottom of the scraper 56, when cleaning the materials in the collection chute 4, the bottom of the scraper 56 is first cleaned; at the same time, the plurality of floating scrapers 563 further scrape the surface of the collection chute 4, thereby increasing the material cleaning force.

[0035] When in use, after the belt conveyor is running, the watery coal slime is conveyed through the conveying belt 3. During the conveying process, some of the coal slime materials will fall into the collecting chute 4; at the same time, the conveying belt 3 will also carry some materials during the return journey, and the materials carried on the return journey will also fall into the collecting chute 4; at this time, the materials will accumulate in the collecting chute 4. If they are not cleaned up in time, the on-site environment will be seriously affected, and the loss of watery coal slime materials will also be caused; at this time, the driving mechanism 6 runs to pull the scraper trolley 5 to move through the wire rope 7, and after the scraper trolley 5 moves, the inner wall of the collecting chute 4 is scraped multiple times through the scraper 56 and the floating scraper 563 at the bottom to realize the cleaning and collection of the falling materials.

[0036] Please refer to Figure 3-4 In this embodiment, the collecting chute 4 is U-shaped, and the bottom surface of the collecting chute 4 is a carbon steel tank body 41. The surface of the carbon steel tank body 41 is provided with a wear-resistant lining plate 42. The wear-resistant lining plate 42 is a high molecular polyethylene plate with high wear resistance to prevent the scraper from scraping and damaging the surface. At the same time, the wear-resistant lining plate 42 ensures a smaller damping coefficient when the scraper trolley is running, and also ensures that the water-like coal slime does not leak. The environmental sanitation on site is better protected. The two sides of the collecting chute 4 are fixedly provided with slideway grooves 43 for the movement of the scraper trolley 5.

[0037] The slide groove 43 is arranged along the length direction of the collecting chute 4, a trapezoidal wedge block 431 is provided at the bottom opening of the slide groove 43, a rear roller groove 432 is provided inside the trapezoidal wedge block 431, and a limiting groove 433 is provided on the inner wall of the slide groove 43 along its own length direction.

[0038] like Figure 5 As shown, in this embodiment, the driving mechanism 6 includes a motor, a reducer, and a bidirectional rope pulley group. The scraper cleaning speed is controlled within a reasonable range by selecting a reasonable reducer, a gear ratio, and a rope pulley group diameter. The scraper trolley 5 is moved back and forth in the collection chute 4 to scrape the material through the bidirectional rope pulley group.

[0039] Please refer to Figure 6-8 The scraper trolley 5 also includes a frame 51, a traction rod is provided at one end of the frame 51, and an extension rod 55 is provided at the other end. The scraper 56 is fixed to the end of the extension rod 55. Two rolling wheels 54 are provided on each side of the frame 51, and an anti-deviation wheel 53 is provided between the two rolling wheels 54. The rolling wheel 54 cooperates with the cross-section of the roller groove 432, and the anti-deviation wheel 53 cooperates with the cross-section of the limit groove 433.

[0040] Due to the arrangement of the trapezoidal wedge block 431 to form a roller groove 432, a limit is provided outside the roller groove 432, and the rolling wheel 54 cannot deviate left or right when the scraper trolley moves; and the anti-deviation wheel 53 always rolls in the limit groove 433, further limiting the scraper trolley, making the whole more stable when moving the scraper.

[0041] Please refer to Fig. 9 , 11 12. Under normal conditions, the floating scraper 563 extends out of the bottom surface of the scraper 56. When scraping off the falling materials, the bottom surface of the floating scraper 563 contacts the surface of the collecting chute 4. The extending lengths of the multiple floating scrapers 563 gradually increase from the outside to the inside.

[0042] The floating scraper 563 includes a plurality of spliced ​​lifting plates 5631, one side of the lifting plate 5631 is provided with a slide groove 5632, and the other side is provided with a slider 5633 matched with the slide groove 5632, and every two adjacent lifting plates 5631 are spliced ​​and matched with the slider 5631 through the slide groove 5632, and the surface of the lifting plate 5631 is provided with a plurality of compression springs 5634, the bottom of the compression spring 5634 is fixed on the surface of the lifting plate 5631, and the top of the compression spring 5634 is fixed on the inner top surface of the mounting groove 562.

[0043] When scraping, the compression spring 5634 is always in a compressed state. At this time, the downward thrust of the compression spring 5634 can increase the contact strength between the lifting plate 5641 and the collection chute 4, thereby improving the scraping efficiency. At the same time, since each lifting plate 5631 is independently set, it can be lifted and lowered separately; therefore, when encountering a collection chute 4 with a concave surface, the compression spring 5634 will push the lifting plate 5641 downward to move a certain distance to avoid the lifting plate 5641 being unable to contact the surface and affecting the scraping effect; when encountering a collection chute 4 with a convex surface, the bottom surface of the scraper 56 contacts the convex surface, and the rest of the parts are suspended, and the rest of the lifting plates 5641 fill the suspended gaps under the action of the compression spring 5634, so that other low-lying parts can also be effectively scraped, thereby improving the overall scraping and cleaning effect of the material.

[0044] Please refer to Fig.10 The traction rod includes a fixed frame 52 integrally arranged at the end. In the first embodiment, the traction rod is a rod body extending outward from the middle cross beam 511. The outer surface of the fixed frame 52 is provided with a through hole 521 for the wire rope 7 to pass through. A roller 522 is provided in the fixed frame 52, and a through hole is horizontally provided in the roller 522. A first bending hole 523 is provided at the end of the fixed frame 52, one end of the first bending hole 523 faces the fixed frame 52, and the other end is vertically upward. A U-shaped screw 524 is provided at the end of the traction rod, and both ends of the U-shaped screw 524 extend toward the fixed frame 52. The U-shaped screw 524 is provided with a through hole penetrating the traction rod on the side away from the fixed frame 52. A tightening bolt 525 is provided on the outside of the traction rod, and the tightening bolt 525 corresponds to the through hole on the traction rod.

[0045] That is to say, in this embodiment, the purpose of setting the traction rod and the fixing frame 52 at the end is to fix one end of the wire rope 7; the specific connection method is: one end of the wire rope 7 enters the fixing frame 52 at the through hole 521, and then passes through the roller 522 to enter the first bending hole 523; since the other end of the first bending hole 523 is set upward, the wire rope 7 extends upward along the first bending hole 7 and passes through the U-shaped screw 524. At this time, the bolt at the end of the U-shaped screw 524 is tightened to initially lock and fix the wire rope 7; then the wire rope 7 passes through the through hole of the traction rod and extends downward. At this time, the tightening bolt 525 is tightened to fix the wire rope 7 in the traction rod, and finally a protective knot is tied at the end of the wire rope 7 to prevent the wire rope from loosening due to stretching; in this way, the wire rope can be turned in multiple directions and locked, which can greatly improve the connection strength between the wire rope and the fixing frame.

[0046] In addition, a second bending hole 57 is also provided at the end of the middle cross beam of the frame 51, one end of the second bending hole 57 faces the scraper 56, and the other end is open upward, and a tightening bolt is also provided on the outer side of the middle cross beam; similar to the first bending hole 523, the second bending hole 57 can change the extension angle of the other end of the wire rope and lock it, no matter which direction the wire rope 7 is pulled to the left or right, it can drive the scraper trolley 5 to move the scraper in the collection chute 4.

[0047] In this embodiment, the scraper trolley 5 is connected to the driving mechanism 6 through a steel wire rope 7, and the steel wire rope 7 is turned by corner wheels 71 at four corners. A plurality of supporting wheels 72 are arranged under the steel wire rope 7; the driving mechanism 6 adjusts the direction of the traction steel wire rope, thereby enabling the scraper trolley 5 to move and scrape materials in the collection chute 4.

[0048] Embodiment 2: After the scraping is completed in the above embodiment 1, the scraper trolley needs to move back to its original position. However, when moving back, the scraper 56 will scrape the material in the reverse direction. In order to prevent the scraper 56 from scraping the material in the reverse direction when the trolley returns to its original position, a movable rod 512 and a hinged connecting rod 513 are provided; please refer to Fig.13 Based on the above embodiment, a movable rod 512 is provided in the middle cross beam 511 of the traction trolley 5, and both ends of the movable rod 512 are provided with fixed frames 52 connected to the wire rope 7, the extension rod 55 is hinged to the scraper 56, and the scraper 56 is hinged to the movable rod 512 through a hinged connecting rod 513. When the movable rod 512 moves in the middle cross beam 511, it drives the scraper 56 to flip and lift through the hinged connecting rod 513.

[0049] Since the traction trolley 5 reciprocates in the collecting chute 4, traction forces in two different directions are required, and the fixed frames 52 at both ends of the movable rod 512 can meet the requirements of wire rope connection traction.

[0050] Since the movable rod 512 can be inserted and pulled out in the middle cross beam 511, and the insertion and pulling action of the movable rod 512 can drive the scraper 56 to flip and lift through the hinged connecting rod 513, the scraper 56 can be automatically flipped and lifted to meet the reciprocating scraping needs.

[0051] When scraping, the steel wire rope 7 pulls the fixed frame 52 on the left, and the movable rod 512 extends to the left, pushing the hinged connecting rod 513 to drive the scraper 56 to contact the surface of the collection chute 4 to achieve scraping and cleaning. Since the steel wire rope 7 continuously pulls the fixed frame on the left, the traction will generate thrust to make the scraper 56 tightly attached to the surface of the collection chute 4, thereby improving the scraping efficiency.

[0052] When the scraping is completed and the scraper trolley needs to move to the right to return to its original position, the wire rope 7 pulls the fixed frame 52 on the right side. At this time, the movable rod 512 extends to the right. At this time, the movable rod 512 will pull the hinged connecting rod 513 to flip and lift the scraper; at this time, when the trolley moves to the right, the scraper 56 does not contact the surface of the collection chute 4, and the entire trolley can pass smoothly in the collection chute 4.

[0053] If it is necessary to scrape the material again, the fixed frame on the left side can be pulled again by the driving mechanism 6, and the scraping of the trolley and the return of the trolley can be achieved in this reciprocating manner.

[0054] Example 3: Please refer to Fig.14 Based on the above-mentioned embodiment 2, scrapers 56 and hinged connecting rods 513 can also be respectively provided on both sides of the scraper trolley 5. When the fixed frame 52 on the left side is pulled to the left, the scraper on the left side tightly contacts the surface of the collecting chute 4 to scrape the material, while the scraper on the right side is pulled and pulled by the movable rod 512 to flip upward and lift up; similarly, when pulling to the right, the scraper on the right side scrapes the material, and the scraper on the left side is pulled and lifted up; in this way, reciprocating scraping is achieved.

[0055] Based on the above embodiment, the bidirectional rope pulley group in the driving mechanism can also be replaced by a chain, a pulley or a gear, and of course the trolley can be towed by other driving methods; in addition, the motor in the driving mechanism can be a ZJQ reducer or a WPDZ reducer.

[0056] Based on the above embodiment, a PLC program can also be set up to realize the timing, positioning, and quantitative cleaning of the return belt of the conveyor by the reciprocating return cleaning device through the program and the controller.

[0057] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A reciprocating return cleaning device, comprising a head and a tail of a belt conveyor, wherein a conveying belt is arranged in the belt conveyor, and characterized in that: A collecting chute is provided directly below the conveyor belt, and a scraper trolley for scraping off the returning materials is provided in the collecting chute. The scraper trolley can reciprocate in the collecting chute through a driving mechanism, and a scraper is provided on the outer side of the scraper trolley, and an arc-shaped slope is provided on the outer side of the scraper. A plurality of mounting grooves arranged parallel to each other are provided at the bottom of the scraper, and the mounting grooves are inclined and arranged along the length direction of the scraper, and a floating scraper is provided in each mounting groove.

2. The reciprocating return cleaning device according to claim 1, characterized in that: Under normal conditions, the floating scraper extends out of the bottom surface of the scraper, and when scraping off the falling materials, the bottom surface of the floating scraper contacts the surface of the collecting chute; the extension lengths of the multiple floating scrapers gradually increase from the outside to the inside.

3. The reciprocating return cleaning device according to claim 1 or 2, characterized in that: The floating scraper includes a plurality of lifting plates which are spliced ​​together, a slide groove is provided on one side of the lifting plate, and a slider which cooperates with the slide groove is provided on the other side, and every two adjacent lifting plates are spliced ​​together by the slide groove and the slider, and a plurality of compression springs are provided on the surface of the lifting plate, and the bottom of the compression spring is fixed on the surface of the lifting plate, and the top of the compression spring is fixed on the inner top surface of the mounting groove.

4. The reciprocating return cleaning device according to claim 1, characterized in that: The collecting chute is U-shaped, the bottom surface of the collecting chute is a carbon steel trough body, the surface of the carbon steel trough body is provided with a wear-resistant lining plate, the wear-resistant lining plate is a polymer polyethylene plate, and slideway grooves for the movement of the scraper trolley are fixedly provided on both sides of the collecting chute.

5. The reciprocating return cleaning device according to claim 4, characterized in that: The slideway groove is arranged along the length direction of the collecting chute, a trapezoidal wedge block is arranged at the bottom opening of the slideway groove, a rear roller groove is arranged inside the trapezoidal wedge block, and a limiting groove is arranged on the inner wall of the slideway groove along its own length direction.

6. The reciprocating return cleaning device according to claim 1, 4 or 5, characterized in that: The scraper trolley also includes a frame, a traction rod is provided at one end of the frame, and an extension rod is provided at the other end, the scraper is fixed to the end of the extension rod, two rolling wheels are provided on each side of the frame, an anti-skewness wheel is provided between the two rolling wheels, the rolling wheel matches the cross-section of the roller groove, and the anti-skewness wheel matches the cross-section of the limit groove.

7. The reciprocating return cleaning device according to claim 5, characterized in that: The traction rod includes a fixing frame integrally arranged at the end, the outer surface of the fixing frame is provided with a through hole for the wire rope to pass through, a roller is provided in the fixing frame, and a first bending hole is provided at the end of the fixing frame, one end of the first bending hole faces the fixing frame, and the other end is vertically upward, a U-shaped screw is provided at the end of the traction rod, both ends of the U-shaped screw extend toward the fixing frame, the U-shaped screw is provided with a through hole penetrating the traction rod on the side away from the fixing frame, and a tightening bolt is provided on the outside of the traction rod, and the tightening bolt corresponds to the through hole on the traction rod.

8. The reciprocating return cleaning device according to claim 6, characterized in that: A second bending hole is also provided at the end of the middle cross beam of the frame, one end of the second bending hole faces the scraper, and the other end opens upward, and a tightening bolt is also provided on the outer side of the middle cross beam.

9. The reciprocating return cleaning device according to claim 1, characterized in that: The scraper trolley is connected to a driving mechanism via a steel wire rope, and the steel wire rope is turned by turning wheels at four corners, and a plurality of supporting wheels are arranged below the steel wire rope.

10. The reciprocating return cleaning device according to claim 6, characterized in that: A movable rod is arranged in the middle cross beam of the traction trolley, and both ends of the movable rod are provided with fixed frames connected with steel wire ropes. The extension rod is hinged to the scraper, and the scraper and the movable rod are hinged through an articulated connecting rod. When the movable rod moves in the middle cross beam, it drives the scraper to flip and lift through the articulated connecting rod.

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