A type of openable anti-reverse gray board

Abstract

This invention discloses an openable anti-reverse ash plate, belonging to the technical field of anti-reverse ash plate technology. It includes a frame base, an opening / closing guide assembly, an opening / closing execution unit, and an elastic locking unit. The frame base is fixed to the material inlet inside the ash collection trolley; a row of positioning holes is formed on both sides of the frame base; the opening / closing guide assembly includes an opening / closing frame body, with horizontal slides formed on both sides of the opening / closing frame body; multiple guide plates are integrally formed on the top of the horizontal slides of the opening / closing frame body, and vertical slides communicating with the horizontal slides are formed on the guide plates; the opening / closing execution unit consists of a row of parallel opening / closing plate units, each opening / closing plate unit including a central guide post, on which two hinges are rotatably and oscillating; side guide posts are fixed at both ends of the bottom of each hinge; the openable anti-reverse ash plate of this invention controls the opening and closing of the hinges by moving the opening / closing frame body up and down, and the opening / closing angle of the hinges can achieve self-locking positioning.

Description

Technical Field

[0001] This invention specifically relates to an openable anti-reverse gray board, belonging to the technical field of anti-reverse gray board. Background Technology

[0002] When collecting adsorbed dust and other industrial waste, the dust collector places the collected waste in a dust collection trolley. An anti-backflow dust plate is placed on the trolley to prevent the filter cartridge from sucking the waste back up during operation, thus reducing work efficiency. For example, Chinese Patent Publication No. CN206304488U discloses a high-efficiency dust removal and purification device, including a shell, inlet pipe, guide plate, fan, inspection door, ash hopper, support, outlet pipe, filter cartridge, compressed air tank, jet pipe, solenoid valve, dust collection trolley, connecting plate, and rollers. The dust collection trolley is equipped with rollers at its bottom. This structure achieves filtration... The drum cleaning system is convenient and easy to install and maintain, resulting in efficient dust removal and purification. However, this structure lacks an anti-backflow ash plate, which can easily lead to backflow of ash. The existing anti-backflow ash plate between the ash collection trolley and the dust collector is a fixed structure, which can cause dust to be sucked back in. Furthermore, when the ash collection trolley needs to empty waste, it needs to be moved to a distant location. During the transfer, dust and other waste inside the trolley may leak out through the gaps between the baffles, causing environmental pollution. In addition, since the anti-backflow ash plate is fixed to the frame, the frame needs to be removed when emptying waste. This operation may cause dangers such as scratches, crushing, and hand injuries from debris. Summary of the Invention

[0003] To address the aforementioned issues, this invention proposes an openable anti-reverse gray plate, which controls the opening and closing of the hinge by moving the opening and closing frame up and down, and the opening and closing angle of the hinge can achieve self-locking positioning.

[0004] The openable anti-reverse gray plate of the present invention includes:

[0005] A frame base is fixed to the material inlet inside the ash collection trolley; a row of positioning holes is opened on both sides of the frame base.

[0006] An opening and closing guide assembly includes an opening and closing frame, on both sides of which are provided horizontal slides; the opening and closing frame is integrally formed with multiple guide plates on the top of the horizontal slides, and the guide plates are provided with vertical slides that communicate with the horizontal slides.

[0007] The opening and closing execution unit comprises a row of parallel opening and closing plate units. Each opening and closing plate unit includes a central guide post with two hinged flaps that are rotatably mounted on the central guide post. Side guide posts are fixed at both ends of the bottom of each hinged flap. The central guide post is slidably mounted on the inner side of a vertical slide, and the side guide posts are slidably installed with a horizontal slide rail. The central guide post is rotatably mounted with a positioning hole. A central spring body is provided between the side guide posts of adjacent opening and closing plate units, and an end spring body is provided on the end side guide posts of the end opening and closing plate units. An outer cover plate is fixed to the outside of the opening and closing frame. The end of the end spring body away from the side guide post is fixed to the inner end of the outer cover plate.

[0008] An elastic locking unit includes a rack plate fixed to the outside of an end guide plate; locking teeth are engaged on the rack plate; the locking teeth have a horizontally countersunk hole, and a protrusion extends through the inside of the countersunk hole; one end of the protrusion away from the locking teeth is fixed to the inside of the opening and closing frame; a locking spring is provided between the protrusion and the locking teeth and the opening and closing frame.

[0009] When adjusting the hinge opening angle, the opening guide assembly activates, pulling or pushing the opening frame upwards or downwards. Because the two ends of the central guide post are limited by the positioning holes in the frame base, the vertical slide of the opening frame slides linearly along the central guide post, simultaneously driving the outer cover and side guide posts to rise and fall synchronously. When the side guide posts move, they are acted upon by the central and end springs, allowing them to slide along the horizontal slide, thus achieving the hinge opening angle adjustment. When the opening frame slides up and down, the elastic locking unit engages in elastic locking. Specifically, when the opening frame slides, it synchronously drives the rack plate to slide, which pushes the locking tooth block to slide horizontally along the protrusion. During sliding, the locking spring is compressed. When the opening frame stops moving, the spring force of the locking spring pushes the locking tooth block to elastically lock the rack plate.

[0010] Furthermore, adjustment posts are fixed on both sides of the top of the outer cover plate. The adjustment posts move through the top of the frame base and are fixed through a limit rod. The limit rod is fitted with a rubber wheel. The limit rod serves as the driving component for the lifting and lowering action of the opening and closing frame. When the limit rod is pulled up or pressed down, the adjustment posts are linearly guided through the frame base. The limit rod synchronously drives the adjustment posts to slide up and down. The adjustment posts drive the outer cover plate and the opening and closing frame to lift and lower synchronously, thereby realizing the adjustment of the hinge opening and closing angle.

[0011] Furthermore, the bottom of the fold is integrally formed with a fold plate. When the fold is perpendicular to the ground, the fold plates are aligned and pressed together. An adhesive strip is provided on the fold plate away from the turning end. When the opening and closing frame is pressed down to the lowest position, the two folds approach each other, and the fold plates of the folds are pressed together by the adhesive strip, thereby forming a seal at the bottom of the fold plate. When waste needs to be poured out, waste is prevented from entering between the fold plates.

[0012] Furthermore, a guide rail is fixed to the side of the rack plate; a stop is integrally formed on the side of the locking tooth block; a disengagement spring is fixed to the inner side of the stop, a wheel seat is fixed to the front end of the disengagement spring, a traveling wheel is rotatably arranged on the wheel seat, and the traveling wheel is rolled with the guide rail; an elastic locking pin is fixed on the wheel seat; and a locking hole is provided on the locking tooth block to engage with the elastic locking pin.

[0013] After the hinge opening angle is adjusted, pull the wheel seat back to compress the disengagement spring. At this time, the elastic locking pin engages with the locking hole, and the traveling wheel separates from the guide rail. The spring force of the locking spring can then lock the locking tooth block and the rack plate, thereby locking the hinge opening angle. When the hinge opening angle needs to be adjusted, pull the elastic locking pin outward. At this time, the elastic locking pin disengages from the inside of the locking hole, and the spring force of the disengagement spring pushes the wheel seat forward. The traveling wheel of the wheel seat then abuts against the guide rail, thereby separating the locking tooth block from the rack plate by a certain gap, facilitating the rack plate to slide up and down. During sliding, the locking tooth block compresses the locking spring, enabling quick adjustment of the hinge opening angle, and automatic locking after adjustment.

[0014] Furthermore, a glue plate is fixed to the top of the outer side of the fold; the glue plate can protect the fold and the middle guide post, and can also seal the top of the fold.

[0015] Furthermore, the ash collection trolley's inlet is fixed with an anti-reverse ash pipe seat via a flange or an embedded fitting, and the frame seat is fixed inside the anti-reverse ash pipe seat; when the opening and closing frame is at its lowest position, it does not protrude from the bottom of the anti-reverse ash pipe seat; when the opening and closing frame is at its highest position, it does not protrude from the top of the anti-reverse ash pipe seat; the openable anti-reverse ash plate can be directly installed into the ash collection trolley's inlet according to installation requirements, or the anti-reverse ash pipe seat can be used as an integrated component of the openable anti-reverse ash plate, and then the anti-reverse ash pipe seat can be assembled with the ash collection trolley's inlet, which facilitates the loading and unloading of the openable anti-reverse ash plate.

[0016] Furthermore, the locking tooth block is integrally formed with meshing teeth on the side near the rack plate; in use, the hinge opening angle is adjusted by pressing down or pulling up the opening frame. When the opening frame is pulled up or pressed down, the rack plate on the opening frame can slide up and down synchronously. When the rack plate slides, it can push the locking tooth block away from the rack plate, thereby compressing the locking spring. When the opening frame stops moving, the elastic force of the locking spring can lock the locking tooth block and the rack plate; thus, the hinge opening angle can be automatically adjusted as needed.

[0017] Furthermore, a toothed disc that meshes with the rack plate is rotatably mounted on the locking tooth block; a ring-shaped locking hole is formed on the toothed disc, and a self-locking reset type spring positioning pin is fixed on the locking tooth block; the pin head of the self-locking reset type spring positioning pin is movably engaged with the locking hole; the self-locking reset type spring positioning pin can retract the pin head or insert the pin head. When the pin head is inserted, the pin head engages with the locking hole. At this time, the toothed disc is locked by the self-locking reset type spring positioning pin, and the toothed disc will not rotate. At this time, the position of the opening and closing frame is limited. When it is necessary to adjust the folding opening and closing angle, the self-locking reset type spring positioning pin is pulled outward and rotated, the pin head retracts, and the pin head disengages from the locking hole. At this time, the toothed disc can rotate along the rack plate, thereby adjusting the height of the opening and closing frame and realizing the adjustment of the folding opening and closing angle.

[0018] Furthermore, a sealing strip is fixed to the side of the hinge away from the central guide post. When the opening and closing frame is at its highest position, the hinge is in a horizontal state, and the sealing strips of adjacent hinges are in contact with each other. When it is necessary to close the material inlet of the ash collection trolley, the opening and closing frame is lifted to the top, the central spring body and the end spring body are reset, and the hinge can be swung to a horizontal state, so that adjacent hinges are brought closer to each other, and the sealing strips of the hinges are in contact with each other to seal, thereby preventing internal dust from being exposed.

[0019] Compared with existing technologies, the openable anti-reverse ash plate of this invention has a simple structure and does not involve significant modifications to the original design. The improved design not only prevents waste leakage during transportation but also ensures the normal operation of the anti-reverse ash plate, making waste handling more convenient and safer. The improved design changes the fixed structure of the anti-reverse ash plate to an openable one, which is fixed inside the material inlet. When not vacuuming, it is closed to prevent internal dust from escaping. When the ash collection trolley is connected to the dust collector, the trolley and dust collector work together to press down the opening frame, creating a 30° to 60° angle on the hinges, allowing dust to slide off more effectively and preventing backflow. When emptying waste, pressing the opening frame down fully opens the hinges, allowing the waste to be poured out directly. During operation, the opening and closing of the hinges is controlled by moving the opening frame up and down, and the opening angle of the hinges is self-locking. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the installation structure of the middle guide post and two hinges of the present invention.

[0021] Figure 2 This is a schematic diagram of the arrangement structure of a row of hinged plate units according to the present invention.

[0022] Figure 3 This is a schematic diagram of the overall structure of the opening and closing execution unit of the present invention.

[0023] Figure 4 This is a schematic diagram of the overall structure of the outer cover plate of the present invention.

[0024] Figure 5 This is a schematic diagram of the mounting structure of the outer cover plate and the opening / closing execution unit of the present invention.

[0025] Figure 6 This is a schematic diagram of the mounting structure of the outer cover plate, opening and closing execution unit and frame base of the present invention.

[0026] Figure 7 This is a schematic diagram of the partial installation structure of the outer cover plate, opening and closing execution unit and frame base of the present invention.

[0027] Figure 8 This is a schematic diagram of the overall structure of Embodiment 1 of the openable anti-reverse gray plate of the present invention.

[0028] Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure at point A in the middle.

[0029] Figure 10 This is a schematic diagram of the overall structure of Embodiment 2 of the openable anti-reverse gray plate of the present invention.

[0030] Figure 11 For the present invention Figure 10 A magnified schematic diagram of the structure at point B in the middle.

[0031] Figure 12 For the present invention Figure 11 A magnified schematic diagram of the structure at point C.

[0032] Figure 13 This is a schematic diagram of the overall structure of Embodiment 3 of the openable anti-reverse gray plate of the present invention.

[0033] Figure 14 This is a schematic diagram of the overall structure of Embodiment 4 of the openable anti-reverse gray plate of the present invention.

[0034] Figure 15 This is a schematic diagram of the ash collection state of the openable anti-reverse ash plate of the present invention.

[0035] Figure 16 This is a schematic diagram of the closed state of the openable anti-reverse gray plate of the present invention.

[0036] Reference numerals: 1. Frame base; 2. Opening / closing frame; 3. Horizontal slide rail; 4. Guide plate; 5. Vertical slide rail; 6. Middle guide post; 7. Hinge; 8. Side guide post; 9. Middle spring body; 10. End spring body; 11. Outer cover plate; 12. Rack plate; 13. Locking tooth block; 14. Protruding post; 15. Locking spring; 16. Adjusting post; 17. Limiting rod; 18. Rubber wheel; 19. Folding plate; 20. Guide rail; 21. Stop; 22. Disengagement spring; 23. Wheel seat; 24. Traveling wheel; 25. Elastic locking pin; 26. Lock hole; 27. Rubber plate; 28. Anti-reverse ash tube seat; 29. ​​Gear plate; 30. Lock hole; 31. Self-locking reset type spring positioning pin. Detailed Implementation

[0037] Example 1:

[0038] like Figures 1 to 9 , Figure 15 and Figure 16 The openable anti-reverse gray panel shown includes:

[0039] Frame base 1, the frame base 1 is fixed to the material inlet inside the ash collection trolley; a row of positioning holes is opened on both sides of the frame base 1;

[0040] An opening and closing guide assembly includes an opening and closing frame 2, on which horizontal slides 3 are provided on both sides; multiple guide plates 4 are integrally formed on the top of the horizontal slides 3, and vertical slides 5 communicating with the horizontal slides 3 are provided on the guide plates 4.

[0041] The opening and closing execution unit consists of a row of opening and closing plate units arranged side by side. Each opening and closing plate unit includes a central guide post 6, on which two hinges 7 are rotatably and swingably mounted. Side guide posts 8 are fixed at both ends of the bottom of each hinge 7. The central guide post 6 is slidably disposed on the inner side of the vertical sliding surface, and the side guide posts 8 are slidably installed with the horizontal slide rail 3. The central guide post 6 is rotatably installed with the positioning hole. A central spring body 9 is provided between the side guide posts 8 of adjacent opening and closing plate units, and an end spring body 10 is provided on the end side guide posts 8 of the opening and closing plate units. An outer cover plate 11 is fixed to the outside of the opening and closing frame 2. The end of the end spring body 10 away from the side guide post 8 is fixed to the inner end of the outer cover plate 11.

[0042] The elastic locking unit includes a rack plate 12, which is fixed to the outside of the guide plate 4 at the end. A locking tooth block 13 is engaged on the rack plate 12. The locking tooth block 13 has a horizontally opened countersunk hole, and a protrusion 14 is movably passed through the inside of the countersunk hole. The end of the protrusion 14 away from the locking tooth block 13 is fixed to the inside of the opening and closing frame 2. A locking spring 15 is provided between the protrusion 14 and the locking tooth block 13 and the opening and closing frame 2.

[0043] When the opening angle of the folding frame 7 is adjusted, the opening guide assembly is activated. By pulling up or pushing down the opening frame 2, the vertical slide 5 of the opening frame 2 slides linearly along the middle guide post 6 because the two ends of the middle guide post 6 are limited by the positioning holes of the frame seat 1. This synchronously drives the outer cover plate 11 and the side guide post 8 to move up and down. When the side guide post 8 moves, it is acted upon by the middle spring body 9 and the end spring body 10, which enables the side guide post 8 to slide along the horizontal slide 3, thereby realizing the adjustment of the opening angle of the folding frame 7. When the opening frame 2 slides up and down, the elastic locking unit performs elastic locking. Specifically, when the opening frame 2 slides, it synchronously drives the rack plate 12 to slide. The rack plate 12 can push the locking tooth block 13 to slide horizontally along the protrusion 14. When sliding, it compresses the locking spring 15. When the opening frame 2 stops moving, the elastic force of the locking spring 15 can push the locking tooth block 13 to elastically lock the rack plate 12.

[0044] Adjustment posts 16 are fixed on both sides of the top of the outer cover plate 11. The adjustment posts 16 move through the top of the frame base 1 and are fixed through a limit rod 17. The limit rod 17 is sleeved with a rubber wheel 18. The limit rod 17 serves as the driving component for the lifting and lowering action of the opening and closing frame 2. When the limit rod 17 is pulled up or pressed down, the adjustment posts 16 are linearly guided through the frame base 1. The limit rod 17 synchronously drives the adjustment posts 16 to slide up and down. The adjustment posts 16 drive the outer cover plate 11 and the opening and closing frame 2 to lift and lower synchronously, thereby realizing the adjustment of the opening and closing angle of the hinge 7.

[0045] The bottom of the hinge 7 is integrally formed with a folding plate 19. When the hinge 7 is perpendicular to the ground, the folding plates 19 are aligned and pressed together. The folding plates 19 are provided with adhesive strips away from the turning ends. When the opening and closing frame 2 is pressed down to the lowest position, the two hinges 7 approach each other, and the folding plates 19 of the hinge 7 are pressed together by the adhesive strips, thereby forming a seal at the bottom of the folding plates 19. When waste needs to be poured out, waste is prevented from entering between the folding plates 19.

[0046] A glue plate 27 is fixed to the top of the outer side of the hinge 7; the glue plate 27 can protect the hinge 7 and the middle guide post 6, and can also seal the top of the hinge 7.

[0047] Example 2:

[0048] like Figures 10 to 12 The openable anti-reverse gray plate shown has a guide rail 20 fixed to the side of the rack plate 12; a stop 21 integrally formed on the side of the locking tooth block 13; a disengagement spring 22 fixed inside the stop 21; a wheel seat 23 fixed at the front end of the disengagement spring 22; a traveling wheel 24 rotatably mounted on the wheel seat 23; the traveling wheel 24 rolling with the guide rail 20; an elastic locking pin 25 fixed on the wheel seat 23; and a locking hole 26 for engaging with the elastic locking pin 25 on the locking tooth block 13.

[0049] After the opening angle of hinge 7 is adjusted, pull wheel seat 23 back to compress disengagement spring 22. At this time, elastic locking pin 25 engages with locking hole 26, and traveling wheel 24 separates from guide rail 20. The spring force of locking spring 15 can lock locking tooth block 13 and rack plate 12, thereby locking the opening angle of hinge 7. When it is necessary to adjust the opening angle of hinge 7, pull elastic locking pin 25 outward. At this time, elastic locking pin 25 disengages from the inside of locking hole 26, and the spring force of disengagement spring 22 pushes wheel seat 23 forward. At this time, traveling wheel 24 of wheel seat 23 abuts against guide rail 20, thereby separating locking tooth block 13 from rack plate 12 by a certain gap, so that rack plate 12 can slide up and down. When sliding, locking tooth block 13 compresses locking spring 15, which can quickly adjust the opening angle of hinge 7 and automatically lock after adjustment.

[0050] Example 3:

[0051] like Figure 13 The closable anti-reverse ash plate shown has an anti-reverse ash pipe seat 28 fixed to the material inlet of the ash collection trolley by a flange or by fitting. The frame seat 1 is fixed inside the anti-reverse ash pipe seat 28. When the opening and closing frame 2 is at its lowest position, it does not protrude from the bottom of the anti-reverse ash pipe seat 28. When the opening and closing frame 2 is at its highest position, it does not protrude from the top of the anti-reverse ash pipe seat 28. The closable anti-reverse ash plate can be directly installed into the material inlet of the ash collection trolley according to installation requirements, or the anti-reverse ash pipe seat 28 can be used as an integrated component of the closable anti-reverse ash plate, and then the anti-reverse ash pipe seat 28 can be assembled with the material inlet of the ash collection trolley, which can facilitate the loading and unloading of the closable anti-reverse ash plate.

[0052] The locking tooth block 13 is integrally formed with meshing teeth on the side near the rack plate 12. In use, the opening angle of the hinge 7 can be adjusted by pressing down or pulling up the opening frame 2. When the opening frame 2 is pulled up or pressed down, the rack plate 12 on the opening frame 2 can slide up and down synchronously. When the rack plate 12 slides, it can push the locking tooth block 13 away from the rack plate 12, thereby compressing the locking spring 15. When the opening frame 2 stops moving, the elastic force of the locking spring 15 can lock the locking tooth block 13 and the rack plate 12. Thus, the opening angle of the hinge 7 can be automatically adjusted as needed.

[0053] Example 4:

[0054] like Figure 14The openable anti-reverse gray plate shown has a toothed disc 29 rotatably mounted on the locking toothed block 13, which meshes with the rack plate 12. A ring-shaped locking hole 30 is formed on the toothed disc 29, and a self-locking reset spring positioning pin 31 is fixed on the locking toothed block 13. The pin head of the self-locking reset spring positioning pin 31 is movably engaged with the locking hole 30. The self-locking reset spring positioning pin 31 can retract or insert the pin head. When the pin head is inserted, it engages with the locking hole 30. At this time, the toothed disc 29 is locked by the self-locking reset spring positioning pin 31, and the toothed disc 29 will not rotate. The position of the opening and closing frame 2 is limited. When the opening angle of the hinge 7 needs to be adjusted, the self-locking reset spring positioning pin 31 is pulled outward and rotated, causing the pin head to retract and disengage from the locking hole 30. At this time, the toothed disc 29 can rotate along the rack plate 12, thereby adjusting the height of the opening and closing frame 2 and realizing the adjustment of the opening angle of the hinge 7.

[0055] A sealing strip is fixed to the side of the hinge 7 away from the middle guide post 6. When the opening and closing frame 2 is at its highest position, the hinge 7 is in a horizontal state, and the sealing strips of adjacent hinges 7 are in contact with each other. When it is necessary to close the material port of the ash collection trolley, the opening and closing frame 2 is lifted to the top, the middle spring body 9 and the end spring body 10 are reset, which can swing the hinge 7 to a horizontal state, so that adjacent hinges 7 are close to each other, and the sealing strips of the hinge 7 are in contact with each other to seal, thereby preventing the internal dust from being exposed.

[0056] The above embodiments are merely preferred embodiments of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention are included within the scope of the present invention.

Claims

1. A closable anti-reverse gray board, characterized in that: It includes: Frame seat, the frame seat is fixed to the material port inside the ash collecting trolley; A row of positioning holes is opened opposite on both sides of the frame seat; Opening and closing guide assembly, the opening and closing guide assembly includes an opening and closing frame body, a horizontal sliding track is opened opposite on both sides of the opening and closing frame body; A plurality of guide plates are integrally made on the top of the horizontal sliding track; Vertical sliding tracks are opened on the guide plates and communicate with the horizontal sliding track; Opening and closing execution unit, the opening and closing execution unit is composed of a row of parallel arranged opening and closing plate units, the opening and closing plate unit includes a middle guide column, two folding leaves are swingingly arranged on the middle guide column; Side guide columns are fixed on both ends of the bottom of the folding leaves; The middle guide column is slidingly arranged inside the vertical sliding track; The side guide columns are slidingly installed with the horizontal sliding track; The middle guide column is rotatably installed with the positioning hole; The middle spring body is arranged between the side guide columns of adjacent opening and closing plate units; The side guide columns of the end opening and closing plate unit are provided with the end spring body; The outer cover plate is fixed outside the opening and closing frame body; The end spring body is fixed to the inner side end of the outer cover plate away from the side guide column; Elastic locking unit, the elastic locking unit includes a rack plate, the rack plate is fixed outside the end guide plate; The rack plate is engaged with a locking tooth block; The locking tooth block is horizontally provided with a counterbore, the counterbore is movably embedded with a protruding column; The protruding column is fixed to the inner side of the frame seat away from the locking tooth block; The locking spring is arranged between the protruding column and the locking tooth block and the frame seat; The outer cover plate is fixed with a positioning column on both sides of the top, the positioning column is movably arranged through the top of the frame seat and penetrates the limiting rod, and the limiting rod is sleeved with a rubber wheel; The folding leaves are integrally made with folding plates on the bottom, when the folding leaves are perpendicular to the ground, the folding plates are pressed and matched with each other; The rubber strip is arranged on the folding plate away from the turning end; When the ash collecting trolley is connected with the dust collector, the opening and closing frame body is pressed down through the cooperation of the ash collecting trolley and the dust collector, so that the folding leaves present an included angle of 30° to 60°, which can make the dust slide down better and prevent the dust from being sucked back.

2. The reversible board of claim 1, wherein: The rack plate is fixed with a guide rail on the side; The locking tooth block is integrally made with a stop seat on the side; The stop spring is fixed in the stop seat, the front end of the stop spring is fixed with a wheel seat, the walking wheel is rotatably arranged on the wheel seat, and the walking wheel is rollingly arranged with the guide rail; The elastic lock pin is fixed on the wheel seat; The locking tooth block is provided with a clamping hole movably locked with the elastic lock pin.

3. The reversible board of claim 1, wherein: The rubber plate is fixed on the top of the outside of the folding leaf.

4. The reversible board of claim 1, wherein: The anti-dust backflow pipe seat is fixed by flange or embeddedly fixed at the material port of the ash collecting trolley, and the frame seat is fixed inside the anti-dust backflow pipe seat; When the opening and closing frame body is in the lowest position, it does not protrude from the bottom of the anti-dust backflow pipe seat; When the opening and closing frame body is in the highest position, it does not protrude from the top of the anti-dust backflow pipe seat.

5. The reversible board of claim 1, wherein: The locking tooth block is integrally made with an engaging tooth body on the side close to the rack plate.

6. The reversible board of claim 1, wherein: The locking tooth block is rotatably provided with a tooth disc engaged with the rack plate; The tooth disc is provided with a ring-shaped lock hole; The self-locking reset type spring positioning pin is fixed on the locking tooth block; The pin head of the self-locking reset type spring positioning pin is movably clamped with the lock hole.

7. The reversible board of claim 1, wherein: The seal strip is fixed on the side of the fold away from the middle guide column, when the frame body is in the highest position, the fold is in the horizontal state, and the seal strips of the adjacent folds are adhered to each other.

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