Method for preventing leakage of rotary cleaner and rotary leakage-preventing cleaner

Abstract

This invention provides a method for preventing leakage in a rotary screen cleaner. A secondary screen is installed at the top of the bottom screen, with its lower end hinged to the bottom screen and its upper end abutting against the main screen. The drive mechanism, rake, main screen, and secondary screen are configured such that, driven by the drive mechanism, the rake rotates around the main screen. When the rake abuts against the upper end of the secondary screen during its upward movement, it pushes the upper end of the secondary screen away from the main screen. When the rake leaves the secondary screen, its upper end returns to abutting against the main screen. This invention uses a secondary screen between the bottom and main screens to block the gap between them, preventing dirt from leaking out. The secondary screen is hinged to the bottom screen, and its upper end abuts against the main screen, forming a closed barrier that effectively solves the problem of dirt leaking between the bottom and main screens.

Description

Technical Field

[0001] This invention relates to the field of water conservancy machinery technology, and in particular to a method for preventing leakage of a rotary cleaning machine and a rotary cleaning machine for preventing leakage. Background Technology

[0002] Rotary screen cleaners are automated wastewater treatment equipment primarily used to remove larger suspended solids and floating matter from wastewater, protecting the normal operation of subsequent equipment and reducing the treatment load. They are widely used in municipal and industrial wastewater treatment facilities, such as water intake pumping stations, rainwater and sewage pumping stations, urban flood control and drainage pumping stations, wastewater treatment plant inlet pumping stations, and power plant cooling water intakes. They feature high automation, high solids separation efficiency, low power consumption, low operating noise, and good corrosion resistance.

[0003] Rotary screen cleaners mainly consist of a frame, main screen, cleaning rakes, lifting chains, and a motor reduction drive. During operation, the cleaning rakes, driven by the drive unit, scoop up the debris intercepted by the underwater screen (bottom screen). The lifting chains on both sides then rotate clockwise from the back to the front of the main screen. When the rakes reach the highest point of the main screen, they flip, allowing the debris to fall by gravity onto a debris transport device for discharge or through other means, thus achieving the purpose of decontamination. However, existing rotary screen cleaners have a relatively large gap between the bottom and main screens to ensure smooth rake rotation. But when there are no rakes between the main and bottom screens, debris can easily flow downstream through this gap, endangering the operation of downstream units. Summary of the Invention

[0004] The present invention provides a method for preventing leakage of a rotary cleaning machine and a rotary cleaning machine for preventing leakage of dirt to solve at least one of the above-mentioned problems.

[0005] According to one aspect of the present invention, a method for preventing leakage of a rotary screen cleaner is provided, wherein the rotary screen cleaner includes a frame, a rake, a main grid, a bottom grid, and a drive mechanism; the main grid is located in the middle of the frame; the bottom grid is located on the lower front side of the frame; a secondary grid is provided at the top of the bottom grid, the lower end of the secondary grid is hinged to the bottom grid, and the upper end abuts against the main grid; the drive mechanism, the rake, the main grid, and the secondary grid are configured such that: under the drive of the drive mechanism, the rake rotates around the main grid; when the rake abuts against the upper end of the secondary grid during its upward movement, the rake pushes the upper end of the secondary grid away from the main grid; when the rake leaves the secondary grid, the upper end of the secondary grid returns to abutting against the main grid.

[0006] The present invention provides a method for preventing leakage in a rotary screen cleaner by setting a secondary screen between the bottom screen and the main screen to block the gap between them and prevent dirt from leaking out. The secondary screen is hinged to the bottom screen, and its upper end abuts against the main screen, forming a closed screen that effectively solves the problem of dirt leaking out between the bottom screen and the main screen. To allow the rake to rotate around the main screen and remove dirt left on the main screen and secondary screen, the secondary screen is also designed to rotate along the top of the bottom screen. When the rake removes dirt from the secondary screen and the main screen, it can push the secondary screen away from the main screen. After the rake removes the dirt, the top of the secondary screen returns to abutting against the main screen, blocking the gap between the bottom screen and the main screen.

[0007] In some embodiments, the present invention provides buffer bars at both ends of the secondary grid, and a buffer body is provided on the side of the buffer bars closer to the main grid, with the free end of the buffer body protruding beyond the end face of the secondary grid closer to the main grid. Due to the effects of water flow and eccentricity, the top of the secondary grid will again abut against the main grid bar after the rake leaves. The buffer body can prevent the secondary grid from directly impacting the main grid bar during reset, thus avoiding wear on the main grid bar and extending its service life.

[0008] In some embodiments, the present invention provides cushioning rubber on the frame at a position opposite to the buffer body. Providing cushioning rubber at a position opposite to the buffer body can reduce the impact force on the frame and main grid bars during sub-grid reset.

[0009] In some embodiments, the present invention configures one end of the buffer rubber to be fixedly connected to the frame, and the other end to be suspended downwards; the position on the frame opposite to the suspended end is set as an arc surface; the buffer body is positioned opposite to the suspended end of the buffer rubber. This configuration can further reduce the impact force on the frame and main grid bars during the reset of the secondary grid. When the buffer body abuts against the suspended end of the buffer rubber, the impact force of the secondary grid is reduced; when the suspended end of the buffer rubber abuts against the arc surface on the frame, the impact force of the secondary grid is further reduced.

[0010] In some embodiments, the present invention includes a sliding bearing inside the hinge joint between the sub-grid and the bottom grid, and a dirt-proof cover outside the hinge joint. This arrangement prevents dirt from entering the hinge joint and thus restricting the rotation of the sub-grid.

[0011] In some embodiments, the present invention provides chain grooves on both sides of the main grid, and installs two first transmission chains in the left and right chain grooves respectively. The two ends of the rake are fixedly connected to the two first transmission chains. Slide grooves are provided on the sides of the chain grooves, and rollers that roll along the slide grooves are provided at both ends of the rake. The drive mechanism drives the first transmission chains to rotate the rake up and down along the slide grooves. Providing pulleys at both ends of the rake and corresponding slide grooves on the frame can prevent the rake teeth from swaying and thus hindering the operation of the cleaning machine.

[0012] In some embodiments, the rake of the present invention includes multiple rake teeth, a rake shaft, and anti-torsion plates; the rake teeth and the rake shaft are detachably connected; the rake teeth have an annular body, and the outer surface of the annular body is provided with lifting teeth and shoveling teeth, the included angle between the axes of the shoveling teeth and the lifting teeth is less than 150°; each of the shoveling teeth and the lifting teeth has an anti-torsion groove at its bottom that communicates with the inner cavity of the annular body; the rake shaft is cylindrical in shape, and two anti-torsion plates of similar length to the rake shaft are provided on its outer side; the annular body of the rake teeth is sleeved on the rake shaft, and the anti-torsion groove is sleeved on the anti-torsion plates. Traditional rakes weld the rake teeth to the rake shaft, which is difficult to manufacture and prone to damage, and repairing damage is also troublesome, requiring complete disassembly and re-welding. The rake of the present invention uses detachable connections for all components, facilitating processing and maintenance. The rake teeth can be laser-cut as a whole, which is quick and easy to process; the rake teeth are fitted onto the rake tooth shaft, which is easy to install; no holes need to be drilled on the rake tooth shaft, so it will not affect its stress; if a rake tooth is damaged, it can be easily removed and replaced with a new rake tooth.

[0013] In some embodiments, the present invention provides positioning shaft holes above the anti-torsion grooves of the lifting teeth and the shoveling teeth, and inserts positioning sleeve shafts into the positioning shaft holes; positioning sleeves are fitted on the positioning sleeve shafts and between each adjacent rake tooth. The positioning sleeves can fix the position of the rake teeth and facilitate rake tooth positioning during installation.

[0014] In some embodiments, the diameter of the positioning sleeves located between the scraping teeth of the rake teeth at the outermost edge of the rake shaft is set to be larger than the diameter of the positioning sleeves located between the scraping teeth in the middle of the rake shaft. This way, when the rake teeth abut against the secondary grid, the positioning sleeves located between the scraping teeth of the rake teeth at the outermost edge of the rake shaft will abut against the secondary grid bars, while the positioning sleeves located in the middle of the rake shaft will not contact the secondary grid bars. The positioning sleeves at the edge of the rake shaft are easy to replace after wear, and this design avoids wear on the positioning sleeves in the middle of the rake shaft.

[0015] According to another aspect of the present invention, a rotary anti-leakage cleaning machine is provided, characterized in that the above-mentioned rotary cleaning machine is used to prevent leakage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a rotary anti-leakage and cleaning machine according to one embodiment of the present invention;

[0017] Figure 2 for Figure 1 The diagram shown is a structural schematic of a rotary anti-leakage cleaning machine viewed from another angle.

[0018] Figure 3This is a schematic diagram of the structure of the auxiliary grid of a rotary anti-leakage cleaning machine according to one embodiment of the present invention;

[0019] Figure 4 This is a partial structural schematic diagram of a rotary anti-leakage cleaning machine according to one embodiment of the present invention.

[0020] Figure 5 for Figure 3 The diagram shows the state of the rotary anti-soil cleaning machine when the toothed rake contacts the auxiliary grid.

[0021] Figure 6 for Figure 3 The diagram shows the state of the buffer device after the rake of the rotary anti-sludge cleaning machine leaves the secondary grid.

[0022] Figure 7 for Figure 3 A partial structural schematic diagram of the buffer device of the rotary anti-leakage cleaning machine shown;

[0023] Figure 8 This is a partial structural diagram of the toothed rake of a rotary anti-leakage cleaning machine according to one embodiment of the present invention.

[0024] Figure 9 for Figure 8 The diagram shows the exploded structure of the toothed rake of the rotary anti-leakage cleaning machine.

[0025] Figure 10 for Figure 8 The diagram shows the structure of the integrated rake teeth.

[0026] Figure 11 for Figure 8 The diagram shows the structure of the roller shaft of the rake. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0029] Finally, it should be noted that in this document, relational terms such as first and second, counterclockwise and clockwise, forward and reverse are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising" or "including" include not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] According to an embodiment of the present invention, a method for preventing leakage of a rotary cleaning machine is provided, wherein a secondary grid 43 is provided at the top of the bottom grid 42, the lower end of the secondary grid 43 is hinged to the bottom grid 42, and the upper end of the secondary grid 43 abuts against the main grid 41; and the drive mechanism, the toothed rake 30, the main grid 41 and the secondary grid 43 are configured such that: under the drive of the drive mechanism 20, the toothed rake 30 rotates up and down around the main grid 41; when the toothed rake 30 abuts against the upper end of the secondary grid 43 during its upward movement, the toothed rake 30 pushes the upper end of the secondary grid 43 away from the main grid 41; when the toothed rake 30 leaves the secondary grid 43, the upper end of the secondary grid 43 returns to abutting against the main grid 41.

[0031] The present invention will now be described in further detail with reference to the accompanying drawings.

[0032] Figure 1 and Figure 2 The structure of a rotary anti-leakage cleaning machine according to one embodiment of the present invention is shown schematically.

[0033] refer to Figure 1 and Figure 2 As shown, the rotary anti-leakage cleaning machine includes a frame 10, a toothed rake 30, a main grid 41, a bottom grid 42, a secondary grid 43, and a drive mechanism 20.

[0034] The frame 10 is generally rectangular, with a rounded, backward-sloping top. The width of the frame 10 can be set according to the actual needs of the water conservancy project.

[0035] The main grid 41 is located in the middle of the frame 10. The main grid bars of the main grid 41 are parallel to each other, evenly spaced, and arranged vertically. The lower end of the main grid 41 is usually located underwater. An arc-shaped back plate 11 is provided above the main grid 41.

[0036] The bottom grid 42 is located on the lower front side of the frame 10, and is typically positioned underwater. Two first hinge plates 425 are provided at the upper end of the bottom grid 42. The gap between the bottom grid 42 and the main grid 41 is sufficient for the rake 30 to pass smoothly. The height of the secondary grid 43 is greater than the gap between the bottom grid 42 and the main grid 41. During the process of the rake 30 contacting and moving away from the secondary grid 43, the upper end of the secondary grid 43 always faces clearly towards the main grid 41.

[0037] The secondary grid 43 is tilted, and the second hinge plate 435 at the lower end of the secondary grid 43 is hinged to the first hinge plate 425 at the upper end of the bottom grid 41, so that the upper end of the secondary grid 43 abuts against the main grid 41. The main grid 41, the secondary grid 43, and the bottom grid 41 are all used to intercept dirt in the water.

[0038] Thus, the main grid 41, the secondary grid 43, and the bottom grid 42 form a closed barrier, preventing dirt from leaking downstream.

[0039] The drive mechanism 20 drives the rake 30 to rotate up and down around the main screen 41. On the side of the main screen 41 facing the auxiliary screen 43, the rake 30 moves from bottom to top; on the other side of the main screen 41, the rake 30 moves from top to bottom. As the rake 30 flips downward at the top of the main screen 41, it can dump the sludge it carries from the bottom screen 42, the auxiliary screen 43 and the main screen 41 onto a sewage discharge device set behind the main screen 41 for removal.

[0040] During the upward movement of the toothed rake 30, it passes through the gap between the main grid 41 and the bottom grid 42. When the toothed rake 30 abuts the upper end of the secondary grid 43, it pushes the upper end of the secondary grid 43 away from the main grid 41. After the toothed rake 30 continues to move upward and leaves the secondary grid 43, due to the water flow and eccentricity, the upper end of the secondary grid 43 will return to abutting the main grid 41. The maximum angle between the secondary grid 43 and the bottom grid 42 can be set to no more than 180° to prevent it from flipping towards the direction of the incoming water.

[0041] In this embodiment, the drive mechanism 20 includes a motor 27, a first transmission chain 21, a second transmission chain 22, a first transmission wheel 23, a second transmission wheel 24, a third transmission wheel 25, and a transmission rod 26. In other embodiments, the drive mechanism may also use hydraulic or pneumatic transmission to drive the rake 30 to rotate up and down around the main grid 41.

[0042] The first transmission wheel 23 is fixedly connected to the mover of the motor 27, and the motor 27 can drive the first transmission wheel to rotate.

[0043] A chain groove is provided on each of the left and right sides of the frame 10, and the chain groove surrounds the side of the main grid 41. Two first drive chains 21 are respectively installed in the left and right chain grooves. The two ends of the toothed rake 30 are fixedly connected to the two first drive chains 21 respectively. The spacing of the rake teeth of the toothed rake 30 can be set to be consistent with the spacing of the main grid bars of the main grid 41, and the rake teeth of the toothed rake 30 can extend into the gaps between the main grid bars. Multiple toothed rakes 30 can be arranged at intervals on the first drive chain 21. As the drive mechanism 20 drives, the toothed rakes 30 can continuously remove the dirt left on the auxiliary grid 43 and the main grid 41.

[0044] The transmission rod 26 can be mounted on the top of the frame 10, spanning the upper part of the main grid 41. Two third transmission wheels 25 are fixedly connected to both ends of the transmission rod 26, and two first transmission chains 21 are respectively sleeved on the third transmission wheels 25. A second transmission wheel 24 is fixedly mounted on the outer end of the third transmission wheel 25 on the right side of the transmission rod 26. The first transmission wheel 23 and the second transmission wheel 24 are connected by a second transmission chain 22 sleeved on them.

[0045] Steering wheels are provided at the bottom of the two chain grooves respectively. The first transmission chain 21 is sleeved on the steering wheels, and a steering cover 12 is provided on the outside of the steering wheels.

[0046] When the motor 27 starts, it drives the first transmission wheel 23 to rotate. The first transmission wheel 23 drives the second transmission wheel 24 to rotate through the second transmission chain 22. The second transmission wheel 24 drives the two third transmission wheels 25 to rotate through the transmission rod 26. The two third transmission wheels 25 respectively drive the two first transmission chains 21 installed in the two chain grooves to rotate. The two first transmission chains 21 drive the toothed rake 30 to rotate up and down around the main grid 41.

[0047] Figure 3 The structure of the secondary grid of a rotary anti-leakage cleaning machine according to one embodiment of the present invention is shown schematically.

[0048] refer to Figure 3As shown, the sub-grid 43 includes multiple parallel, evenly spaced, and vertically arranged sub-grid bars 431. The lower ends of the sub-grid bars 431 are welded to a support plate 434. The support plate 434 has an L-shaped cross-section, and the lower ends of the sub-grid bars 431 and the lower part of one side are welded to the support plate 434. A buffer bar 432 is provided at each end of the sub-grid 43. A buffer body 433 for triggering buffering is provided on the side of the buffer bar 432 near the main grid. The end face of the free end of the buffer body 433 protrudes beyond the rear end face of the sub-grid bar 431. When the sub-grid 43 moves towards the main grid 41, the buffer body 433 contacts the frame 10 or the main grid 41 first. In this embodiment, the buffer body 433 adopts a cylindrical structure and is made of steel. In other embodiments, the buffer body 433 can also adopt other structures such as a hexagonal prism or a semi-cylinder, and the material can be other corrosion-resistant materials.

[0049] The lower half of the secondary grid bar 431 is threaded onto the support rod 436. Two second hinge plates 435 are provided at the lower end of the support plate 434, adapted to the position of the first hinge plate 425 on the bottom grid 42, for hinged connection with the bottom grid 42. The first hinge plate 425 and the second hinge plate 435 are covered with a dirt-proof cover, and a sliding bearing is installed inside to prevent dirt from entering the hinge section and affecting the rotation of the secondary grid 43. The rotation range between the first hinge plate 425 and the second hinge plate 435 can be set such that the rotation range of the secondary grid 43 is between its top end touching the main grid 41 and the secondary grid 43 being in a vertical state, so that when the secondary grid 43 is not in contact with the rake 30, its top end can always be against the main grid 41 due to the force of the water flow.

[0050] Figure 4 The diagram schematically shows a partial structure of a rotary anti-leakage cleaning machine according to one embodiment of the present invention.

[0051] refer to Figure 4 As shown, the lower end of the chain groove of the cleaning machine is provided with a semi-circular chain steering cover 12, and a cushioning rubber 50 is provided on the front end face of the steering cover 12. (Reference) Figure 7 As shown, one end of the buffer rubber 50 is fixedly connected to the steering cover 12, while the other end is suspended downwards.

[0052] When the cleaning machine is not started, the upper end of the auxiliary grid 43 rests against the main grid 41, and the buffer body 433 on the buffer grid 432 rests against the suspended end of the buffer rubber 50.

[0053] Figure 5 schematically shown Figure 4 The image shows the state of the rake of the cleaning machine when it contacts the auxiliary grid.

[0054] refer to Figure 5As shown, the rake 30 moves from bottom to top along the chain groove under the drive of the first transmission chain 21. When the rake 30 contacts the secondary grid 43, the secondary grid 43 rotates around its hinge axis due to the pushing force of the rake 30, and the upper end of the secondary grid 43 will leave the main grid 41. The scraping teeth 311 of the rake 30 can extend into the gaps of the secondary grid bars 431, and the rake 30 will carry away the dirt retained on the secondary grid 43. After the rake 30 moves to the top of the frame 10, it will flip over. At this time, the included angle between the scraping teeth 311 and the lifting teeth 312 is downward, and the attached dirt can be dumped onto the dirt conveying equipment set at the rear of the frame 10 and carried away.

[0055] Figure 6 schematically shown Figure 5 The image shows the state of the cleaning machine's rake after it leaves the secondary screen.

[0056] refer to Figure 6 As shown, after the rake 30 leaves the top of the secondary grid 43, due to gravity and water flow, the secondary grid 43 rotates around the hinge axis, and the top of the secondary grid 43 moves closer to the main grid 41. Since the free end of the buffer body 433 at the front end of the buffer bar 432 protrudes from the rear end face of the secondary grid bar 431, before the top of the secondary grid bar 431 contacts the main grid bar, the buffer body 433 first abuts against the suspended end 51 of the buffer rubber 50. The buffer body 433 pushes the suspended end 51 of the buffer rubber 50 towards the arc surface of the steering cover 12, further enhancing the buffering effect. This arrangement prevents the top of the secondary grid bar 431 from making hard contact with the main grid bar, reduces wear on the main grid bar and the secondary grid bar 431, and protects the main grid 41 and the secondary grid 43. In other embodiments, the arc surface can also be provided on other parts of the frame 10, as long as its position corresponds to the suspended end 51 of the buffer rubber 50.

[0057] Figures 8-10 The diagram schematically illustrates the structure of the toothed rake of a rotary anti-leakage cleaning machine according to one embodiment of the present invention.

[0058] Because the structure of the toothed rake 30 is symmetrical, Figure 8 Only one end of the toothed rake 30 is shown. (Reference) Figure 8 and Figure 9 As shown, the rake 30 includes multiple rake teeth 31, a rake tooth shaft 35, an end plate 32, a roller 33, an anti-torsion plate 36, a positioning sleeve shaft 37, a first positioning sleeve 381, and a second positioning sleeve 382. The rake teeth 31, the end plate 32, the roller 33, the positioning sleeve shaft 37, the first positioning sleeve 381, and the second positioning sleeve 382 are detachably connected to the rake tooth shaft 35.

[0059] refer to Figure 10As shown, the rake teeth 31 are configured with a circular body. The outer surface of the circular body has a lifting tooth 312 and a shoveling tooth 311. The included angle between the axes of the shoveling tooth 311 and the lifting tooth 312 can be 90-150°. In this embodiment, the included angle between the axes of the shoveling tooth 311 and the lifting tooth 312 is 120°. When the rake 30 moves from bottom to top, the included angle between the shoveling tooth 311 and the lifting tooth 312 is upward. Setting the included angle between the axes of the shoveling tooth 311 and the lifting tooth 312 to 120° allows the rake teeth 31 to scoop up as much dirt as possible each time, and reduces the amount of dirt falling during the lifting process.

[0060] At the bottom of both the scraping tooth 311 and the lifting tooth 312, an anti-torsion groove 314 communicating with the inner cavity 315 of the annular body is provided. A positioning shaft hole 313 is provided above each of the anti-torsion grooves 314. The thickness of the annular body is the same as the thickness of the scraping tooth 311 and the lifting tooth 312. The rake tooth 31 can be integrally laser-cut, which is quick, accurate, and provides good stress distribution. The rake tooth 31 is fitted onto the rake tooth shaft 35. Since there are no openings on the rake tooth shaft 35, the stress on the rake tooth shaft 35 is not affected.

[0061] The rake tooth shaft 35 is cylindrical in shape, and its diameter matches the inner diameter of the annular body of the rake tooth 31. Two anti-torsion plates 36, with a length equivalent to that of the rake tooth shaft 35, are provided on the outer side of the rake tooth shaft 35. The position and shape of the two anti-torsion plates 36 are adapted to the position and shape of the anti-torsion grooves 314 of the shovel tooth 311 and the lift tooth 312, respectively. The anti-torsion plates 36 can enhance the rigidity of the rake tooth 31.

[0062] A detachable end plate 32 is provided at each end of the rake tooth shaft 35. The end plates 32 are connected to the end face of the rake tooth shaft 35 by four double-ended bolts 341. The detachable connection between the end plates 32 and the rake tooth shaft facilitates the replacement of damaged rake teeth 31.

[0063] The outer diameter of the positioning sleeve shaft 37 is adapted to the inner diameter of the positioning shaft hole 313 of the rake tooth 31, and also to the inner diameter of the first positioning sleeve 381 and the second positioning sleeve 382.

[0064] The annular body of the rake tooth 31 is fitted onto the rake tooth shaft 35, the anti-torsion groove 314 is fitted onto the anti-torsion plate 36, and the positioning sleeve shaft 37 passes through the positioning shaft hole 313 of the rake tooth 31. A positioning sleeve is fitted onto the positioning sleeve shaft 37 between adjacent rake teeth 31. The positioning sleeve shaft 37 has external threads at both ends, and is tightened from both ends by double nuts 342 to clamp the rake tooth 31 and the positioning sleeve. The diameter of the first positioning sleeve 381, located between the scraping teeth 311 of the three rake teeth 31 at the outermost edge of the rake tooth shaft 35, is larger than that of the second positioning sleeve 382 located in the middle of the rake tooth shaft 35. This arrangement reduces wear on the second positioning sleeve 382. The first sleeve 381 is located at both ends of the rake 30, making it easier to replace the first sleeve 381 than the second sleeve 382 due to wear.

[0065] A sliding groove is provided on the side of the chain groove. Two rollers 33, respectively provided at both ends of the rake 30, roll along the sliding grooves on both sides to prevent the rake 30 from swaying and causing the machine to be obstructed. A stop surface 332 perpendicular to the end face is provided on the end face of the roller shaft 331 of the roller 33, and the stop surface 332 abuts against the end plate 32.

[0066] The spacing of the rake teeth 31 is consistent with the spacing of the secondary grid bars and the spacing of the main grid bars. The shovel teeth 311 of the rake teeth 31 can be inserted between the secondary grid bars, and the lifting teeth 312 of the rake teeth 31 can be inserted between the main grid bars.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A rotary anti-leakage cleaning machine, characterized in that, It includes a frame, toothed rakes, a main grid, a bottom grid, and a drive mechanism; the main grid is located in the middle of the frame; the bottom grid is located on the lower front side of the frame; A sub-gate is provided at the top of the bottom gate, the lower end of the sub-gate is hinged to the bottom gate, and the upper end of the sub-gate abuts against the main gate; The drive mechanism, rake, main grid, and auxiliary grid are configured such that: the drive mechanism drives the rake to rotate up and down around the main grid; when the rake abuts against the upper end of the auxiliary grid during its upward movement, the rake pushes the upper end of the auxiliary grid away from the main grid; when the rake leaves the auxiliary grid, the upper end of the auxiliary grid returns to abutting against the main grid. Buffer bars are provided at both ends of the sub-grid, and a buffer body is provided on the side of the buffer bars closer to the main grid. The free end of the buffer body is configured to protrude more than the end face of the sub-grid closer to the main grid. The rake includes multiple rake teeth, a rake shaft, and an anti-torsion plate; The rake teeth and the rake tooth shaft are configured to be detachably connected. The rake teeth have a circular body, and the outer surface of the circular body is provided with lifting teeth and shovel teeth. The included angle between the axes of the shovel teeth and the lifting teeth is less than 150°. The bottom of both the shovel teeth and the lifting teeth is provided with an anti-torsion groove that communicates with the inner cavity of the annular body. The rake tooth shaft is cylindrical in shape, and two anti-torsion plates with a length equivalent to that of the rake tooth shaft are set on the outside of the rake tooth shaft. The annular body of the rake tooth is fitted onto the rake tooth shaft, and the anti-torsion groove is fitted onto the anti-torsion plate. Positioning shaft holes are respectively provided above the anti-torsion grooves of the lifting teeth and shovel teeth, and positioning sleeve shafts are inserted into the positioning shaft holes; positioning sleeves are fitted on the positioning sleeve shafts and between each adjacent rake tooth. The diameter of the positioning sleeve between the scraping teeth of the rake teeth located at the outermost edge of the rake shaft is set to be larger than the diameter of the positioning sleeve between the scraping teeth located in the middle of the rake shaft.

2. The rotary anti-leakage and cleaning machine according to claim 1, characterized in that, A cushioning rubber is provided on the frame at a position opposite to the buffer body.

3. The rotary anti-leakage cleaning machine according to claim 2, characterized in that, One end of the buffer rubber is fixedly connected to the frame, and the other end is suspended downwards as a suspended end; the position on the frame opposite to the suspended end is set as an arc surface; the buffer body is set opposite to the suspended end of the buffer rubber.

4. The rotary anti-leakage and cleaning machine according to claim 3, characterized in that, A sliding bearing is installed inside the hinge joint between the sub-grid and the bottom grid, and a dirt-proof cover is installed outside the hinge joint.

5. The rotary anti-leakage and cleaning machine according to claim 1, characterized in that, Chain grooves are provided on both sides of the main grid, and two first transmission chains are installed in the left and right chain grooves respectively. The two ends of the toothed rake are fixedly connected to the two first transmission chains respectively. A chute is provided on the side of the chain groove, and rollers that roll along the chute are provided at both ends of the toothed rake. The drive mechanism drives the first transmission chain to make the toothed rake rotate up and down along the slide groove.

6. A method for preventing leakage of dirt, characterized in that, Applied to the rotary anti-leakage cleaning machine as described in any one of claims 1-5.

Images