Rainwater collecting pipeline self-cleaning device

Abstract

The self-cleaning device comprises a rectangular shell with an opening in the lower end, a cylindrical shell is fixed to the upper end face of the rectangular shell, a first rotating shaft is arranged in the cylindrical shell, a plurality of water baffles are evenly distributed on the first rotating shaft along the circumference, and a water inlet is formed in the upper left end of the cylindrical shell; a bearing plate is arranged in the rectangular shell and located below a communicating opening of the cylindrical shell and the rectangular shell, the bearing plate is always kept high in the left and low in the right, a hinge shaft is fixed to the right end of the bearing plate and rotationally connected with the front end face and the rear end face of the rectangular shell, and a plurality of water penetrating holes penetrating through the upper end face and the lower end face are formed in the bearing plate. The water permeable holes can blow air upwards; rainwater is blocked through the water baffle, so that the rainwater collides with the water baffle at intervals and swings up and down along the hinge shaft, air in the corrugated pipe can be continuously blown out towards the upper side of the water permeable hole through the air blowing hole, it is guaranteed that the water permeable hole is not blocked by garbage impurities, and meanwhile the moving efficiency of the garbage impurities above the bearing plate is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of sponge city construction, and specifically to a self-cleaning device for rainwater collection pipelines. Background Art

[0002] In order to avoid water accumulation on the top of buildings, drainage pipelines need to be reserved inside the buildings or installed on the outer facades. At the same time, in response to the construction of sponge cities, existing drainage systems often set up rainwater collection systems to improve the utilization rate of rainwater resources. Roofs or balconies with relatively low building heights are more likely to accumulate dust, fallen leaves, floating garbage, etc. due to weather and seasonal effects. Once washed into the drainage pipelines by rainwater, it is extremely easy to cause pipeline blockages and difficult to clean later. A rain and sewage pipeline anti-blocking structure for smart cities disclosed in the prior art with the publication number CN214940809U filters rainwater through a water filter box. However, the capacity of the water filter box is limited, and the filtered impurities need to be taken out manually at regular intervals, resulting in poor practicability. An anti-blocking and impurity-filtering drainage outlet for a building disclosed in the publication number CN112681492B intercepts large-sized impurities and flocs in the water body on the surface of the coarse screen first by setting two layers of sieves at the drainage outlet position. The sludge and dirt and small particle impurities in the sewage are intercepted by the fine sieve cover, and the impurities on the coarse screen are cleaned by a cleaning plate, which can avoid the drainage pipeline being blocked by impurities. However, it is difficult to effectively clean the cleaning plate and vibration after the coarse screen holes are blocked, and the cleaning plate requires manual operation, resulting in poor practicability. The impurity collection capacity of the sieve cover is limited and also requires manual cleaning at regular intervals. A building water supply and drainage system disclosed in the publication number CN115571935A filters impurities at the first level through a receiving plate with leakage holes, and then drives the receiving plate to swing up and down by a motor to control the opening and closing of the leakage holes, so that the water flow drives the blockages on the receiving plate to flow into the impurity collection frame, and then the spiral feeding fan blade transports the impurities to the discharge port to achieve centralized collection and treatment. However, this solution requires the motor to provide a power source for the receiving plate. Installing a motor separately at the building drainage outlet also requires considering motor cable arrangement and environmental working conditions, resulting in high installation and use costs and difficult later maintenance. The rotating pins and spiral feeding fan blades on the receiving plate are easily entangled by flocculent impurities and require manual cleaning at regular intervals. Summary of the Invention

[0003] In view of the above situation, to overcome the defects of the prior art, the present invention adopts a self-cleaning device for rainwater collection pipelines, which solves the problem that the blockages in rainwater collection pipelines in the prior art are not easy to clean.

[0004] The technical solution it adopts is a self-cleaning device for rainwater collection pipelines, which includes a rectangular shell with an opening at the lower end. A cylindrical shell is fixed on the upper end face of the rectangular shell. A first rotating shaft is rotatably connected inside the cylindrical shell. A plurality of water baffle plates are evenly distributed along the circumference on the first rotating shaft. An inlet is opened at the upper left end of the cylindrical shell. The lower end of the cylindrical shell is communicated with the cavity of the rectangular shell. A receiving plate is arranged inside the rectangular shell below the communication port between the cylindrical shell and the rectangular shell. The receiving plate always maintains a state of being higher on the left and lower on the right, and a hinge shaft is fixed at the right end. The hinge shaft is rotatably connected with the front and rear end faces of the rectangular shell. A plurality of water-permeable holes penetrating the upper and lower end faces are opened on the receiving plate. When the receiving plate swings downward, the water-permeable holes can blow air upward; A collection box is arranged inside the rectangular shell below the receiving plate. A second rotating shaft placed horizontally is arranged inside the collection box. The second rotating shaft can rotate along with the first rotating shaft. A spiral blade is arranged on the second rotating shaft. When the spiral blade rotates, it can push the materials in the collection box forward and discharge them along the front end face of the rectangular shell; Above the second rotating shaft, there is a razor that can move back and forth without interfering with the spiral blade. The lower end of the razor is a tip and the front and rear sides are blades. When the razor slides forward, the tip of the razor faces downward and fits against the outer edge surface of the second rotating shaft. When the razor slides backward, the tip of the razor faces backward and is located above the spiral blade, and the whole razor is inclined with the front end higher and the rear end lower.

[0005] The water-permeable holes are distributed in a rectangular array on the receiving plate. An air blowing hole is opened on the left inner edge surface of each water-permeable hole, and the air blowing hole is arranged with the left end lower and the right end higher. A communication pipe communicating with the air blowing holes in this row is opened at the rear side of each row of water-permeable holes inside the receiving plate. A vertical hole is opened at the left lower end face of the receiving plate. The left end of each communication pipe is communicated with the vertical hole. A baffle is arranged below the left side of the receiving plate. The front and rear ends of the baffle are respectively fixed to the front and rear end faces of the rectangular shell. The baffle and the receiving plate are connected by a corrugated pipe. The vertical hole is located inside the corrugated pipe. An air exchange hole penetrating the upper and lower end faces is opened on the baffle inside the corrugated pipe. Check valves are respectively arranged in the air exchange hole and the vertical hole. When the corrugated pipe is compressed, the gas inside the corrugated pipe can only enter the vertical hole. When the corrugated pipe is stretched, the gas can only enter the corrugated pipe through the air exchange hole; A compression spring is arranged inside the corrugated pipe, and the two ends of the compression spring are respectively fixed to the receiving plate and the baffle.

[0006] Above the second rotating shaft, there is a rectangular pipe placed parallel to the second rotating shaft. The front and rear ends of the rectangular pipe are respectively fixed to the front and rear end faces of the rectangular shell. A rectangular slider is slidably connected inside the rectangular pipe. The front and rear end faces of the slider respectively fit against the inner walls of the rectangular pipe. A bidirectional screw rod placed parallel to the second rotating shaft is rotatably connected inside the rectangular pipe. The bidirectional screw rod penetrates the slider and is threadedly connected with the slider; The lower end surface of the slider is provided with a groove that runs through the rear end surface, and the front end surface of the groove is an inclined surface with the normal vector inclined downward. A rotating block is rotatably connected in the groove, and the razor is fixedly connected to the rotating block. A torsion spring is fixed on the rotating block, and the torsion spring makes the lower end of the razor always have a tendency to swing backward; the lower end surface of the rectangular tube is provided with a yield groove that runs through the inner and outer end surfaces, and the free end of the razor can extend out of the lower end surface of the rectangular tube through the yield groove; the front end surface of the groove is provided with a through hole, and a sliding rod that can slide back and forth along the through hole is arranged in the through hole, and a blind hole is provided at the front end of the rotating block, and a pin shaft that can slide back and forth along the blind hole is arranged in the blind hole, and the pin shaft is connected to the bottom of the blind hole by a compression spring. When the razor is perpendicular to the second When the axis is rotated, the end of the pin can be placed in the through hole and contact with the rear end of the slide rod to limit the rotation of the rotating block, and at the same time the front end of the slide rod extends out of the through hole; when the slider moves to the front end, the slide rod can be squeezed backward by the front end surface of the rectangular shell, so that the pin can overcome the elastic force of the compression spring and break away from the through hole, and the rotating block can drive the razor to swing backward, so that the razor tip faces backward and is located on the upper side of the spiral blade, and the razor as a whole is inclined higher at the front and lower at the back; when the slider moves to the rear end, the rear end surface of the rectangular shell can squeeze the free end of the razor, so that the razor drives the rotating block to rotate until the razor is perpendicular to the direction of the second rotating axis, and the pin is squeezed by the inclined surface of the front end surface of the groove to give way to the inside of the blind hole and then re-enters the through hole, and pushes the slide rod forward out of the through hole.

[0007] The upper end surface of the groove is a sloped surface with a high front and a low back. When the razor rotates with the rotating block to contact the upper end surface of the groove, the razor is blocked by the sloped surface and is in an inclined state with a high front and a low back as a whole.

[0008] The front and rear sides of the receiving plate are respectively provided with water retaining strips.

[0009] The front ends of the first rotating shaft and the second rotating shaft both pass through the rectangular shell, and the front ends of the first rotating shaft and the second rotating shaft are fixed with gears that mesh with each other. Since the second rotating shaft is placed at an angle, the gear at the front end of the second rotating shaft is a bevel gear, and the rear ends of the second rotating shaft and the bidirectional screw both pass through the rear end of the rectangular shell and mesh with gears.

[0010] The lower end surface of the front side of the collecting box is provided with a slag discharge channel connected with the inner side of the collecting box, and the slag discharge channel runs through the front end surface of the rectangular shell.

[0011] The lower end surface of the collecting box is an arc-shaped filter plate.

[0012] The present invention blocks rainwater by a water baffle plate, so that rainwater hits the water baffle plate at intervals and swings up and down along the hinge shaft, so that the air in the corrugated tube can be continuously blown out to the upper side of the water permeable hole through the blowing hole, ensuring that the water permeable hole will not be blocked by garbage and impurities, while greatly improving the moving efficiency of garbage and impurities above the receiving plate; the first rotating shaft and the second rotating shaft transmit torque through gear meshing, so that the water baffle plate transmits the kinetic energy of rainwater to the second rotating shaft, driving the spiral blade to rotate, while the second rotating shaft and the bidirectional screw drive the bidirectional screw to rotate through gear meshing, thereby realizing the overall automatic operation of the device without the aid of a motor, greatly reducing the later use cost and improving practicality; by arranging a bidirectional screw in parallel on the upper side of the second rotating shaft 10, and driving the slider to move back and forth by the bidirectional screw, the tip of the razor is in contact with the second rotating shaft when the slider moves forward, and the winding on the second rotating shaft is cut, so as to prevent the second rotating shaft from being entangled and stuck in the process of pushing the material through the spiral blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the front view of the present invention.

[0014] Figure 2 It is a front cross-sectional view of the present invention cut along the axis position of the water permeable hole.

[0015] Figure 3 It is a front cross-sectional view of the present invention cut along the axis line of the connecting pipe.

[0016] Figure 4 For the present invention Figure 3 A is an enlarged view of the middle image.

[0017] Figure 5 It is a right side sectional view cut along the axis of the right second rotating shaft of the present invention.

[0018] Figure 6 For the present invention Figure 5 Enlarged view of B.

[0019] Figure 7 For the present invention Figure 6 Schematic diagram after the middle slider moves to the front end and the razor swings backward.

[0020] Figure 8 It is a front cutaway stereoscopic view of the present invention. DETAILED DESCRIPTION

[0021] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0022] Depend on Figures 1 to 8Given that, the present invention includes a rectangular housing 1 with an open lower end. A cylindrical housing 2 with a horizontally placed axis in the front-rear direction is fixed on the upper end face of the rectangular housing 1. A first rotating shaft 3 is rotatably connected inside the cylindrical housing 2. A plurality of water baffle plates 4 are evenly distributed along the circumference on the first rotating shaft 3. An inlet 5 is opened at the upper left end of the cylindrical housing 2. The lower end of the cylindrical housing 2 is communicated with the cavity of the rectangular housing 1. A receiving plate 6 is arranged below the communication port between the cylindrical housing 2 and the rectangular housing 1 inside the rectangular housing 1. The receiving plate 6 always maintains a left-high and right-low state, and a hinge shaft 7 with a horizontally placed axis in the front-rear direction is fixed at the right end. The hinge shaft 7 is rotatably connected with the front and rear end faces of the rectangular housing 1. A plurality of water permeable holes 8 penetrating the upper and lower end faces are opened on the receiving plate 6. When the receiving plate 6 swings downward, the water permeable holes 8 can blow air upward. A collection box 9 is arranged below the right side of the receiving plate 6 inside the rectangular housing 1. A second rotating shaft 10 placed in the front-rear direction is arranged inside the collection box 9. The second rotating shaft 10 can rotate along with the first rotating shaft 3. A spiral blade 11 is arranged on the second rotating shaft 10. When the spiral blade 11 rotates, it can push the materials inside the collection box 9 forward and discharge them along the front end face of the rectangular housing 1. Above the second rotating shaft 10, a razor 12 that can move back and forth in the front-rear direction and does not interfere with the spiral blade is arranged. The lower end of the razor 12 is a tip, and the front and rear sides are blades. When the razor 12 slides forward, the tip of the razor 12 faces downward and fits with the outer edge surface of the second rotating shaft 10. When the razor 12 slides backward, the tip of the razor 12 faces backward and is located above the spiral blade 11, and the whole razor 12 is inclined with the front end high and the rear end low.

[0023] The water permeable holes 8 are distributed in a rectangular array on the receiving plate 6. An air blowing hole 13 is opened on the left side of the inner edge surface of each water permeable hole 8. The air blowing hole 13 is arranged with the left end low and the right end high. A communicating pipe 14 communicating with the air blowing holes 13 in this row is opened at the rear side of each row of water permeable holes 8 inside the receiving plate 6. A vertical hole 15 is opened at the left side of the lower end face of the receiving plate 6. The left end of each communicating pipe 14 is communicated with the vertical hole 15. A baffle 16 is arranged below the left side of the receiving plate 6. The front and rear ends of the baffle 16 are respectively fixed to the front and rear end faces of the rectangular housing 1. The baffle 16 is connected with the receiving plate 6 through a corrugated pipe 17. The vertical hole 15 is located inside the corrugated pipe 17. An air exchange hole 18 penetrating the upper and lower end faces is opened on the baffle 16 inside the corrugated pipe 17. Check valves are respectively arranged in the air exchange hole 18 and the vertical hole 15. When the corrugated pipe 17 is compressed, the gas inside the corrugated pipe 17 can only enter the vertical hole 15. When the corrugated pipe 17 stretches, the gas can only enter the corrugated pipe 17 through the air exchange hole 18; A compression spring is arranged inside the corrugated pipe 17. The two ends of the compression spring are respectively fixed to the receiving plate 6 and the baffle 16.

[0024] Above the second rotating shaft 10 described, there is a rectangular tube 19 placed parallel to the second rotating shaft 10. The front and rear ends of the rectangular tube 19 are respectively fixedly connected to the front and rear end faces of the rectangular housing 1. A rectangular slider 20 is slidably connected inside the rectangular tube 19. The front and rear end faces of the slider 20 are respectively in contact with the inner wall of the rectangular tube 19. Inside the rectangular tube 19, a bidirectional screw 21 parallel to the second rotating shaft 10 is rotatably connected. The bidirectional screw 21 passes through the slider 20 and is threadedly connected to the slider 20. The rotation of the bidirectional screw 21 can drive the slider 20 to move back and forth in the rectangular tube 19; A groove 22 penetrating to the rear end face is formed on the lower end face of the slider 20. The front end face of the groove 22 is an inclined surface with a downward-inclined normal vector. A rotating block 23 is rotatably connected inside the groove 22. The razor 12 is fixedly connected to the rotating block 23. A torsion spring is fixed on the rotating block 23, and the torsion spring makes the lower end of the razor 12 always tend to swing backward; A through groove 30 penetrating the inner and outer end faces is formed on the lower end face of the rectangular tube 19, and the free end of the razor 12 can extend out of the lower end face of the rectangular tube 19 through the through groove 30; A through hole 24 is formed on the front end face of the groove 22. A sliding rod 25 capable of sliding back and forth along the through hole 24 is arranged inside the through hole 24. A blind hole 26 is formed at the front end of the rotating block 23. A pin shaft 27 capable of sliding back and forth along the blind hole 26 is arranged inside the blind hole 26. The pin shaft 27 is connected to the bottom of the blind hole 26 through a compression spring. When the razor 12 is perpendicular to the second rotating shaft 10, the end of the pin shaft 27 can be placed inside the through hole 24 to contact the rear end of the sliding rod 25 and restrict the rotation of the rotating block 23. At the same time, the front end of the sliding rod 25 extends out of the through hole 24; When the slider 20 moves to the frontmost end, the sliding rod 25 can be squeezed backward by the front end face of the rectangular housing 1, so that the pin shaft 27 overcomes the elastic force of the compression spring and disengages from the through hole 24. The rotating block 23 can drive the razor 12 to swing backward, so that the tip of the razor 12 faces backward and is located above the spiral blade 11, and the whole razor 12 is inclined with the front end high and the rear end low; When the slider 20 moves to the rearmost end, the rear end face of the rectangular housing 1 can squeeze the free end of the razor 12, so that the razor 12 drives the rotating block 23 to rotate to the direction where the razor 12 is perpendicular to the second rotating shaft 10. After the pin shaft 27 is squeezed by the inclined surface of the front end face of the groove 22 to give way to the inner side of the blind hole 26, it re-enters the through hole 24 and pushes the sliding rod 25 forward out of the through hole 24.

[0025] The upper end face of the groove 22 is an inclined surface with the front end high and the rear end low. When the razor 12 rotates with the rotating block 23 to contact the upper end face of the groove 22, the razor 12 is blocked by the inclined surface and is in an inclined state with the front end high and the rear end low as a whole.

[0026] Water blocking strips 28 are respectively arranged on the front and rear sides of the receiving plate 6.

[0027] The front ends of the first rotating shaft 3 and the second rotating shaft 10 both penetrate through the rectangular housing 1. Gears that mesh with each other are fixed at the front ends of the first rotating shaft 3 and the second rotating shaft 10. Since the second rotating shaft 10 is inclined, the gear at the front end of the second rotating shaft 10 is a bevel gear. The rear ends of the second rotating shaft 10 and the bidirectional screw 21 both penetrate through the rear end of the rectangular housing 1 and achieve synchronous rotation through gear meshing.

[0028] A slag discharge channel 29 that communicates with the inside of the collection box 9 is provided on the lower end surface of the front side of the collection box 9, and the slag discharge channel 29 penetrates through the front end surface of the rectangular housing 1.

[0029] The lower end surface of the collection box 9 is an arc-shaped filter plate, and water flow can enter the rectangular housing 1 through the filter plate.

[0030] It is worth mentioning that for this device, the pitch relationship between the spiral blade and the bidirectional screw 21, as well as the gear meshing transmission ratio between the second rotating shaft 10 and the bidirectional screw 21, need to be set in advance, so that when the razor 12 moves left and right as the bidirectional screw 21 rotates, it is always located between two adjacent turns of the spiral blade 11 and does not interfere with the rotation of the spiral blade 11.

[0031] When the present invention is in use, the rectangular housing 1 is fixed on the outside of the building or embedded in the concrete of the top of the building or the balcony floor, so that the lower opening of the rectangular housing 1 communicates with the building drainage pipe, and the water inlet 5 communicates with the drainage outlet at the top of the building or the balcony floor; when it rains, the rainwater carries the garbage and impurities deposited on the building roof or balcony and enters the cylindrical housing 2 through the water inlet 5, and then is discharged to the cavity of the rectangular housing 1 through the communication port between the cylindrical housing 2 and the rectangular housing 1. During this period, the downward kinetic energy of the rainwater impacts the water baffle 4, and the rainwater drives the first rotating shaft 3 to rotate. The water baffle 4 can divide the rainwater into multiple segments and discharge it into the rectangular housing 1. The water flow entering the rectangular housing 1 continues to impact the receiving plate 6, and the rainwater falling on the receiving plate 6 can continue to flow downward through the water permeable holes 7 to the bottom of the rectangular housing 1, and then enter the lower building drainage pipe, while the garbage and impurities remain on the upper end surface of the receiving plate 6, realizing the preliminary dry-wet separation of the impurities and rainwater; since the receiving plate 6 can swing up and down along the hinge shaft 7 in cooperation with the elastic force of the compression spring after being impacted by rainwater with different flow rates, when the receiving plate 6 swings downward, the corrugated pipe 17 is compressed, and the air in the corrugated pipe 17 enters the communication pipe 14 through the vertical holes 15, and then is blown out from the air blowing holes 13 to the upper side of the water permeable holes 8. The blown gas can blow the impurities and garbage above the receiving plate 6 to the right, so that the impurities and garbage move to the right along the receiving plate 6 and enter the collection box 9. When the receiving plate 6 swings upward, due to the action of the one-way valve, the gas can only enter the corrugated pipe 17 through the air exchange holes 18 on the baffle 16 to make up the pressure. The first rotating shaft 3 drives the second rotating shaft 10 to rotate through gear meshing. When the second rotating shaft 10 drives the spiral blade 11 to rotate, it can uniformly push the garbage and impurities in the collection box 9 forward to the front side of the collection box 9 until the garbage is pushed into the slag discharge channel 29, realizing the centralized collection of garbage and impurities; The second rotating shaft 10 drives the bidirectional screw 21 to rotate synchronously through gear meshing. The bidirectional screw 21 can drive the slider 20 to slide back and forth along the length direction of the rectangular pipe 19. When the slider 20 slides forward, the tip of the razor 12 is always in contact with the second rotating shaft 10, and can cut and push the floccules wound around the second rotating shaft 10. Since the second rotating shaft 10 and the bidirectional screw 21 rotate synchronously, as long as the pitch relationship between the spiral blade and the pitch of the bidirectional screw 21, as well as the gear meshing transmission ratio between the second rotating shaft 10 and the bidirectional screw 21 are set in advance, the razor 12 is always located between two adjacent turns of the spiral blade 11 when it rotates left and right with the bidirectional screw 21; When the slider 20 moves to the front end, the sliding rod 25 can be squeezed backward by the front end surface of the rectangular housing 1, so that the pin shaft 27 disengages from the through hole 24 against the elastic force of the compression spring, and the rotating block 23 can drive the razor 12 to swing backward, so that the tip of the razor 12 faces backward and is located above the spiral blade 11, and the whole razor 12 is higher at the front and lower at the rear, and then moves backward with the slider 20; When the slider 20 moves to the rear end, the rear end surface of the rectangular housing 1 can squeeze the free end of the razor 12, so that the razor 12 drives the rotating block 23 to rotate until the razor 12 is perpendicular to the second rotating shaft 10. The pin shaft 27 is squeezed by the inclined surface of the front end surface of the groove 22 to give way to the inside of the blind hole 26 and then re-enters the through hole 24, and pushes the sliding rod 25 forward out of the through hole 24.

[0032] In the present invention, the rainwater is blocked by the water baffle 4, so that the rainwater falls on the receiving plate 6 in sections. After the receiving plate 6 is impacted by the rainwater with different flow velocities, it can swing up and down along the hinge shaft 7 in cooperation with the elastic force of the compression spring, providing a continuous and periodic power source for the receiving plate 6, so that the air in the corrugated pipe 17 can continuously blow out above the water permeable holes 8 through the air blowing holes 13, ensuring that the water permeable holes 8 are not blocked by garbage and impurities while greatly improving the moving efficiency of the garbage and impurities above the receiving plate 6; The first rotating shaft 3 and the second rotating shaft 10 transmit torque through gear meshing, so that the water baffle 4 transmits the kinetic energy of the rainwater to the second rotating shaft 10. While driving the spiral blade 11 to rotate, the second rotating shaft 10 drives the bidirectional screw 21 to rotate through gear meshing with the bidirectional screw 21, realizing the overall automatic operation of the device without the aid of a motor, greatly reducing the later use cost and improving the practicability; By arranging a bidirectional screw rod 21 in parallel on the upper side of the second rotating shaft 10 and driving the slider 20 to reciprocate back and forth through the bidirectional screw rod 21, when the razor 12 moves forward with the slider 20, the tip thereof fits against the second rotating shaft 10 to cut the winding on the second rotating shaft 10, preventing the second rotating shaft 10 from being stuck due to winding during the material pushing process by the spiral blade 11. When the slider 20 moves to the frontmost end, the limiting of the rotating block 23 is contacted by squeezing the pin shaft 27 through the slide bar 25, enabling the razor 12 to swing upward above the spiral blade 11 to avoid interference between the razor 12 and the spiral blade during the backward movement of the slider 20. When the slider 20 moves to the rearmost side, the free end of the razor 12 is squeezed by the rear end face of the rectangular housing 1, causing the razor 12 to fit against the second rotating shaft 10 again, and the pin shaft 27 re-enters the through hole 24 to limit the rotation of the rotating block 23, realizing the reset of the razor 12; In the present invention, by arranging check valves in the vertical hole 15 and the ventilation hole 18, when the bellows 17 is compressed, the gas can only be discharged through the upper vertical hole 15, facilitating the back blowing of the water permeable hole 8. When the bellows 17 is stretched, the gas can only enter the bellows 17 through the ventilation hole 18 on the baffle 16 to supplement the pressure, preventing garbage impurities from being sucked into the air blowing hole 13 to cause blockage.

Claims

1. A rainwater collection pipeline self-cleaning device, characterized in that, It includes a rectangular shell (1) with an open lower end. A cylindrical shell (2) is fixed on the upper end face of the rectangular shell (1). A first rotating shaft (3) is rotatably connected inside the cylindrical shell (2). A plurality of water baffle plates (4) are evenly distributed along the circumference on the first rotating shaft (3). An inlet (5) is opened at the upper left end of the cylindrical shell (2). The lower end of the cylindrical shell (2) is communicated with the cavity of the rectangular shell (1). A receiving plate (6) is arranged below the communication port between the cylindrical shell (2) and the rectangular shell (1) inside the rectangular shell (1). The receiving plate (6) always keeps the left side higher than the right side and the right end is fixed with a hinge shaft (7). The hinge shaft (7) is rotatably connected with the front and rear end faces of the rectangular shell (1). A plurality of water permeable holes (8) penetrating the upper and lower end faces are opened on the receiving plate (6). When the receiving plate (6) swings downward, the water permeable holes (8) can blow air upward. A collection box (9) is arranged at the lower right of the receiving plate (6) inside the rectangular shell (1). A second rotating shaft (10) placed front and back is arranged inside the collection box (9). The second rotating shaft (10) can rotate along with the first rotating shaft (3). A spiral blade (11) is arranged on the second rotating shaft (10). When the spiral blade (11) rotates, it can push the materials in the collection box (9) forward and discharge them along the front end face of the rectangular shell (1). A razor (12) that can move back and forth in the front and rear direction and does not interfere with the spiral blade is arranged above the second rotating shaft (10). The lower end of the razor (12) is a tip and the front and rear sides are blades. When the razor (12) slides forward, the tip of the razor (12) faces downward and fits with the outer edge surface of the second rotating shaft (10). When the razor (12) slides backward, the tip of the razor (12) faces backward and is located above the spiral blade (11), and the whole razor (12) is inclined with the front end higher than the rear end.

2. The self-cleaning device for rainwater collection pipelines according to claim 1, characterized in that, The water permeable holes (8) are distributed in a rectangular array on the receiving plate (6). An air blowing hole (13) is opened on the left inner edge surface of each water permeable hole (8). The air blowing hole (13) is arranged with the left side lower than the right side. A communication pipe (14) communicated with the air blowing holes (13) in this row is opened at the rear side of each row of water permeable holes (8) inside the receiving plate (6). A vertical hole (15) is opened at the left lower end face of the receiving plate (6). The left end of each communication pipe (14) is communicated with the vertical hole (15). A baffle (16) is arranged at the lower left of the receiving plate (6). The front and rear ends of the baffle (16) are respectively fixed to the front and rear end faces of the rectangular shell (1). The baffle (16) is connected with the receiving plate (6) through a corrugated pipe (17). The vertical hole (15) is located inside the corrugated pipe (17). An air exchange hole (18) penetrating the upper and lower end faces is opened on the baffle (16) inside the corrugated pipe (17). Check valves are respectively arranged in the air exchange hole (18) and the vertical hole (15). When the corrugated pipe (17) is compressed, the gas in the corrugated pipe (17) can only enter the vertical hole (15). When the corrugated pipe (17) is stretched, the gas can only enter the corrugated pipe (17) through the air exchange hole (18); A compression spring is arranged inside the corrugated pipe (17). The two ends of the compression spring are respectively fixed to the receiving plate (6) and the baffle (16).

3. The self-cleaning device for a rainwater collection pipeline according to claim 1, characterized in that, Above the described second rotating shaft (10), there is a rectangular tube (19) placed parallel to the second rotating shaft (10). The front and rear ends of the rectangular tube (19) are respectively fixedly connected to the front and rear end faces of the rectangular housing (1). A rectangular slider (20) is slidably connected inside the rectangular tube (19). The front and rear end faces of the slider (20) are respectively in contact with the inner wall of the rectangular tube (19). Inside the rectangular tube (19), a bidirectional screw rod (21) parallel to the second rotating shaft (10) is rotatably connected. The bidirectional screw rod (21) passes through the slider (20) and is threadedly connected to the slider (20). A groove (22) penetrating to the rear end face is provided on the lower end face of the slider (20). The front end face of the groove (22) is an inclined surface with a downward-tilting normal vector. A rotating block (23) is rotatably connected inside the groove (22). The razor (12) is fixedly connected to the rotating block (23). A torsion spring is fixed on the rotating block (23), and the torsion spring makes the lower end of the razor (12) always tend to swing backward. A relief groove (30) penetrating the inner and outer end faces is provided on the lower end face of the rectangular tube (19). The free end of the razor (12) can extend out of the lower end face of the rectangular tube (19) through the relief groove (30). A through hole (24) is provided on the front end face of the groove (22). A sliding rod (25) capable of sliding back and forth along the through hole (24) is arranged inside the through hole (24). A blind hole (26) is provided at the front end of the rotating block (23). A pin shaft (27) capable of sliding back and forth along the blind hole (26) is arranged inside the blind hole (26). The pin shaft (27) is connected to the bottom of the blind hole (26) through a compression spring. When the razor (12) is perpendicular to the second rotating shaft (10), the end of the pin shaft (27) can be placed inside the through hole (24) to contact the rear end of the sliding rod (25) and limit the rotation of the rotating block (23). At the same time, the front end of the sliding rod (25) extends out of the through hole (24). When the slider (20) moves to the frontmost end, the sliding rod (25) can be squeezed backward by the front end face of the rectangular housing (1), so that the pin shaft (27) overcomes the elastic force of the compression spring and disengages from the through hole (24). The rotating block (23) can drive the razor (12) to swing backward, so that the tip of the razor (12) faces backward and is located above the spiral blade (11), and the whole razor (12) is inclined with the front end higher and the rear end lower. When the slider (20) moves to the rearmost end, the rear end face of the rectangular housing (1) can squeeze the free end of the razor (12), so that the razor (12) drives the rotating block (23) to rotate to the direction where the razor (12) is perpendicular to the second rotating shaft (10). After the pin shaft (27) is squeezed by the inclined surface of the front end face of the groove (22) to give way to the inner side of the blind hole (26), it re-enters the through hole (24) and pushes the sliding rod (25) forward out of the through hole (24).

4. The self-cleaning device for a rainwater collection pipeline according to claim 3, characterized in that, The upper end face of the groove (22) is an inclined surface with the front end higher and the rear end lower. When the razor (12) rotates with the rotating block (23) to contact the upper end face of the groove (22), the razor (12) is blocked by the inclined surface and is in an inclined state with the front end higher and the rear end lower as a whole.

5. The self-cleaning device for a rainwater collection pipeline according to claim 1, wherein, Water retaining strips (28) are respectively arranged on the front and rear sides of the receiving plate (6).

6. The self-cleaning device for a rainwater collection pipeline according to claim 1, wherein, The front ends of the described first rotating shaft (3) and second rotating shaft (10) both penetrate through the rectangular housing (1). Gears that mesh with each other are fixed to the front ends of the first rotating shaft (3) and the second rotating shaft (10). Since the second rotating shaft (10) is inclined, the gear at the front end of the second rotating shaft (10) is a bevel gear. The rear ends of the second rotating shaft (10) and the bidirectional screw (21) both penetrate through the rear end of the rectangular housing (1) and are engaged through gears.

7. The self-cleaning device for a rainwater collection pipeline according to claim 1, characterized in that, A slag discharge channel (29) that communicates with the inside of the collection box (9) is provided on the lower front end surface of the described collection box (9). The slag discharge channel (29) penetrates through the front end surface of the rectangular housing (1).

8. The self-cleaning device for a rainwater collection pipeline according to claim 1, characterized in that, The lower end surface of the described collection box (9) is an arc-shaped filter plate.

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