A roof drainage device

Abstract

This application relates to a roof drainage device, comprising a mounting frame, a filter screen, a drain pipe, and a cutting assembly. The drain pipe is vertically arranged and penetrates the roof. The mounting frame is disposed at the inlet of the drain pipe. The filter screen is disposed on the mounting frame and has several elongated filter holes. The cutting assembly includes two cutting blades and a driving unit. The two cutting blades are respectively located on both sides of the filter screen and are slidably connected to the mounting frame. The driving unit is used to bring the two cutting blades closer together and through the filter holes. This application has the effect of improving roof drainage efficiency.

Description

Technical Field

[0001] This application relates to the field of building drainage, and more particularly to a roof drainage device. Background Technology

[0002] Roof drainage is a crucial part of building construction, as it determines whether the building can be habitable later on. Roof drainage methods include unorganized drainage and organized drainage. Organized drainage directs water from the roof into the drain pipes through the drainage system, preventing sewage from spreading everywhere.

[0003] Currently, Chinese invention patent CN116537458A discloses a drainage structure and siphon drainage system, including a drainage pipe vertically installed on the roof. An anti-clogging net is rotatably connected to the opening of the drainage pipe, and a rotating rod is fixedly connected inside the anti-clogging net. One end of the rotating rod, away from the anti-clogging net, extends into the interior of the drainage pipe, and a rotating part is fixedly connected to the other end of the rotating rod. A fixing member is also fixedly connected to the roof, covering the anti-clogging net. The fixing member has a limiting groove, and the top of the anti-clogging net is located within the limiting groove. A cleaning component is connected to the fixing member, abutting against the surface of the anti-clogging net. When the roof drains, the accumulated water in the drainage pipe drives the rotating part to rotate, thereby causing the rotating rod and the anti-clogging net to rotate. The relative rotation of the anti-clogging net and the cleaning component cleans the debris adsorbed on the anti-clogging net. This application effectively cleans debris adsorbed on the anti-clogging net, maintaining good drainage for the roof.

[0004] Regarding the aforementioned technologies, the inventors believe that the following drawbacks exist: During the drainage process, rainwater is always entering the drain pipe through the anti-clogging net. Rainwater on the roof will also move impurities on the roof towards the anti-clogging net. These impurities include lint, hair, and even fallen leaves, which are easily entangled and adsorbed onto the anti-clogging net. It is difficult to remove the impurities by simply moving the debris on the anti-clogging net using cleaning devices. Even if the impurities are removed from the anti-clogging net, they will be quickly adsorbed onto the anti-clogging net again under the influence of rainwater, greatly reducing the roof drainage efficiency. Summary of the Invention

[0005] To improve roof drainage efficiency, this application provides a roof drainage device.

[0006] This application provides a roof drainage device, which adopts the following technical solution:

[0007] A roof drainage device includes a mounting frame, a filter screen, a drain pipe, and a cutting assembly. The drain pipe is vertically arranged and penetrates the roof. The mounting frame is located at the inlet of the drain pipe. The filter screen is mounted on the mounting frame and has several elongated filter holes. The cutting assembly includes two cutting blades and a driving unit. The two cutting blades are located on both sides of the filter screen and are slidably connected to the mounting frame. The driving unit is used to bring the two cutting blades closer together and through the filter holes.

[0008] By adopting the above technical solution, rainwater passes through the filter screen, and impurities on the roof also move towards the filter screen under the washing of rainwater. This causes light impurities such as lint, hair, and fallen leaves to easily get tangled on the filter screen. The drive unit drives two cutting blades to move closer to each other. The cutting blades pass through the filter holes and cut off the impurities tangled on the filter screen, making it easier for the impurities to become shorter and smaller so that they can pass smoothly through the filter screen and enter the drain pipe. This reduces the impurities tangled on the filter screen, increases the water flow speed of the filter screen, and improves the roof drainage efficiency.

[0009] Optionally, the drive unit includes two linkage rods, a driving rod, and a driving gear. The two linkage rods correspond one-to-one with the two cutting blades. The linkage rods are disposed on the cutting blades. The driving rod is rotatably connected to the mounting bracket. The linkage rods are slidably connected to the driving rod along its length. The two linkage rods are respectively located on both sides of the rotation axis of the linkage rod. The driving gear is disposed on the rotation axis of the driving rod. The cutting assembly is also provided with a rotating part for driving the driving gear to rotate.

[0010] By adopting the above technical solution, the rotating part drives the gear to rotate, which in turn drives the rod to rotate. Under the action of the linkage rod sliding along the length of the rod, the two cutting blades move closer to each other and cut off the impurities adsorbed on the filter screen, making it easier for the impurities to pass through the filter screen.

[0011] Optionally, the rotating part includes a rotating rod, a rotating gear, and a spiral blade. One end of the rotating rod is rotatably connected to the mounting bracket, and the other end of the rotating rod passes through the drain pipe. The spiral blade is located inside the drain pipe and is disposed on the rotating rod. The rotating gear is disposed on the rotating rod and meshes with the driving gear.

[0012] By adopting the above technical solution, rainwater enters the drain pipe through the filter screen. Under the action of gravity, the rainwater impacts the spiral blade, causing the spiral blade to rotate. The spiral blade drives the rotating rod to rotate, which in turn drives the rotating gear to rotate. The rotating gear drives the rotating rod to rotate, which in turn drives the rotating rod to rotate. The rotating rod causes two linkage rods to move closer together, which in turn drives the cutting blade to move closer together. The cutting blade removes the impurities adsorbed on the filter screen, improving the water passage effect of the filter screen and increasing the drainage efficiency.

[0013] Optionally, the drive unit further includes a coil spring disposed on the drive gear. The coil spring is used to maintain a distance between the two cutting blades, and the rotating gear has a toothless section for disengaging from the drive gear.

[0014] By adopting the above technical solution, the rotating gear drives the driving gear to rotate, and the rotating gear drives the driving rod to rotate. During the process of the cutting blade cutting off the impurities adsorbed on the filter screen, the coil spring tightens and accumulates and recovers its potential energy. Then, the rotating gear rotates to the toothless section, and the rotating gear disengages from the driving gear. The coil spring releases and recovers its potential energy, driving the driving rod to rotate. The driving rod drives the two linkage rods to move away from each other, and the linkage rods drive the cutting blades to move away from each other. This allows the cutting blade to periodically cut off the impurities on the filter screen as the rainwater continuously drives the rotating part to rotate.

[0015] Optionally, the filter screen is annular, with a plurality of filter holes distributed circumferentially along the axis of the filter screen. The filter screen is rotatably connected to the mounting frame, and the mounting frame is provided with a stepping assembly that drives the filter screen to rotate. The stepping assembly includes a rotating disk, a stepping wheel, a toggle lever, a gear, and a gear ring. The rotating disk is disposed on the mounting frame, the toggle lever is eccentrically disposed on the rotating disk, the stepping wheel is rotatably connected to the mounting frame, and the side wall of the stepping wheel has a plurality of receiving grooves for accommodating the toggle lever. The gear is disposed on the rotation axis of the stepping wheel, and the gear ring is disposed on the filter screen, with the gear meshing with the gear ring.

[0016] By adopting the above technical solution, the spiral blade drives the rotating rod to rotate, the rotating rod drives the rotating disk to rotate, and the rotating disk drives the actuating rod to rotate. Each rotation of the rotating disk causes the actuating rod to rotate the stepping wheel. The stepping wheel rotates at the angle between the lengths of two adjacent receiving slots. The rotation of the stepping wheel drives the gear to rotate, the gear to rotate the gear ring, and the gear ring to rotate the filter screen. The filter holes of the filter screen are sequentially aligned with the two cutting blades. The rotation of the filter screen is achieved through the stepping assembly, facilitating the cutting of impurities wrapped around each filter hole, making the impurities smaller and easier to pass through the filter screen. When the actuating rod drives the stepping wheel to rotate, the rotating gear engages with the toothless section of the driving gear, and the cutting blades are relatively far apart, not performing any cutting action. When the actuating rod moves away from the stepping wheel, the rotating gear meshes with the driving gear, at which point the filter screen stops rotating, and the cutting blades cut the impurities wrapped around the filter holes. The stepping assembly controls the alternating cutting of impurities by the cutting blades and the rotation of the filter screen, improving the speed at which the cutting blades clean the impurities wrapped around each filter hole.

[0017] Optionally, the mounting frame is provided with a water-gathering component for increasing the impact of water flow on the spiral blade. The water-gathering component includes a float and a cover plate. The cover plate is slidably connected to the rotating rod and is used to block the inlet of the drain pipe. The float is located on the side of the cover plate away from the drain pipe.

[0018] By adopting the above technical solution, when the rainfall on the roof is too low, the rainfall cannot drive the spiral blade to rotate and cannot cut off the impurities wrapped around the filter screen. The cover plate blocks the inlet of the drain pipe. At this time, the water level on the roof gradually increases. As the water level increases, the buoyancy of the float ball is greater than the gravity, which drives the cover plate to float up. The cover plate is separated from the drain pipe, and the rainwater enters the drain pipe. Because there is a lot of water on the roof, it is easy to drive the spiral blade to rotate. The spiral blade drives the cutting blade through the drive unit to cut off the impurities wrapped around the filter screen. The water collection component improves the feasibility of the rotating part driving the cutting component.

[0019] Optionally, the water-collecting component further includes a conical tube disposed inside the drain pipe. The diameter of the conical tube at the end facing the inlet of the drain pipe is larger than the diameter at the end facing the outlet of the drain pipe. The conical tube is provided with a spiral groove for guiding rainwater to impact the spiral blade.

[0020] By adopting the above technical solution, the tapered tube is used to collect rainwater in the drainage pipe. The diameter of the tapered tube gradually decreases, so that the cross-sectional area of ​​the rainwater passing through the drainage pipe gradually decreases, and the speed of the rainwater passing through increases. Guided by the spiral groove on the tapered tube, the rainwater forms a vortex and rushes towards the spiral blade, which improves the rotation effect of the spiral blade and the cutting speed of the cutting component, thereby further improving the drainage efficiency of the drainage device.

[0021] Optionally, the mounting bracket is provided with a pushing assembly for actuating impurities on the filter screen. The pushing assembly includes two pushing plates, a bidirectional screw, and a pushing gear. The length direction of the bidirectional screw is parallel to the axial direction of the filter screen. The two pushing plates are slidably connected to the mounting bracket along the length direction of the bidirectional screw. The two pushing plates are respectively threaded to the threaded sections of the bidirectional screw with opposite directions of rotation. The pushing gear is disposed on the bidirectional screw. The pushing plates abut against the outer wall of the filter screen. The pushing gear meshes with the driving gear.

[0022] By adopting the above technical solution, the spiral blade drives the rotating rod to rotate, the rotating rod drives the rotating gear to rotate, the rotating gear drives the push gear to rotate, the push gear drives the bidirectional screw to rotate, and the bidirectional screw drives the two push plates to move closer to each other. The push plates abut against the filter screen, and the push plates center the impurities wrapped around the filter screen. When the rotating gear rotates to the toothless section, the driving gear resets under the action of the coil spring. At this time, the driving gear drives the push gear to reverse, the push gear drives the bidirectional screw to reverse, and the bidirectional screw drives the two push plates to move away from each other. The push assembly has a simple structure, which facilitates the cutting assembly to cut concentrated impurities, reduces the non-parallel force on the cutting assembly, further improves the efficiency of the cutting assembly in cutting impurities, and also increases the service life of the cutting assembly.

[0023] Optionally, the mounting frame is provided with an auxiliary drainage assembly, which includes a float ring, several baffle plates, and several guide rods. The float ring is sleeved on the mounting frame and vertically slidably connected to the mounting frame. The mounting frame has several auxiliary drainage holes at the end opposite to the drain pipe. The baffle plates are slidably connected to the mounting frame along the radial direction of the float ring. Each baffle plate corresponds to one of the auxiliary drainage holes and is used to block the auxiliary drainage holes. The guide rods are disposed on the float ring and correspond to one of the baffle plates. Each guide rod is slidably connected to the baffle plates and is used to guide the baffle plates away from the auxiliary drainage holes.

[0024] By adopting the above technical solution, when the increase in rainwater on the roof is always greater than the drainage capacity of the filter screen, the amount of rainwater on the roof increases, the liquid level on the roof increases, the float ring moves upward under the influence of the liquid level, the guide rod on the float ring moves the baffle plate away from the auxiliary drainage hole, the auxiliary drainage hole opens, and rainwater can also enter the drainage pipe from the auxiliary drainage hole, thus increasing the drainage efficiency of the drainage device when the amount of rainwater is too large. When the liquid level of the accumulated water on the roof gradually decreases, the float ring moves downward under the action of gravity, and the guide rod moves the baffle plate to block the auxiliary drainage hole.

[0025] Optionally, the auxiliary drainage assembly further includes a cutting blade disposed on the rotating gear, the cutting blade being used to cut off impurities wrapped around the auxiliary drainage hole.

[0026] By adopting the above technical solution, when the auxiliary drainage hole is opened, rainwater from the roof will also carry impurities into the auxiliary drainage hole. Over time, the auxiliary drainage hole is prone to blockage. The cutting blade will remove the impurities wrapped around the auxiliary drainage hole, reducing the blockage of the auxiliary drainage hole.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] The cutting component is used to cut off impurities wrapped around the filter screen, improving the drainage efficiency of the drainage device;

[0029] The stepper component drives the filter screen to rotate, and the rotation of the filter screen allows the cutting component to cut the impurities wrapped around the filter holes of each filter screen, further improving the drainage efficiency of the drainage device.

[0030] Auxiliary drainage components are used to temporarily increase the drainage capacity of the drainage system when there is excessive water accumulation on the roof. Attached Figure Description

[0031] Figure 1 It is a roof drainage system.

[0032] Figure 2 yes Figure 1 A sectional view along section line AA.

[0033] Figure 3 yes Figure 1 A schematic diagram of the cutting component.

[0034] Figure 4 yes Figure 1 A schematic diagram of the structure of the driving component.

[0035] Figure 5 yes Figure 1 Exploded view of the auxiliary drainage components.

[0036] Reference numerals: 1. Mounting bracket; 11. Mounting ring; 12. Mounting plate; 121. Auxiliary drainage hole; 13. First mounting rod; 14. Second mounting rod; 2. Filter screen; 21. Filter hole; 3. Drain pipe; 4. Cutting assembly; 41. Cutting blade; 42. Drive unit; 421. Linkage rod; 422. Driving rod; 423. Driving gear; 424. Coil spring; 425. Sliding groove; 43. Rotating part; 431. Rotating rod; 432. Rotating gear; 433. Spiral blade; 434. Toothless section; 435. 5. Mating hole; 51. Stepping assembly; 52. Rotating disk; 52. Stepping wheel; 521. Receiving groove; 53. Actuating rod; 54. Gear; 55. Gear ring; 56. First synchronous pulley; 57. Second synchronous pulley; 58. Synchronous belt; 6. Push assembly; 61. Push plate; 62. Bidirectional screw; 63. Push gear; 7. Water collection assembly; 71. Float; 72. Cover plate; 73. Tapered tube; 731. Spiral groove; 8. Auxiliary drainage assembly; 81. Float ring; 82. Baffle plate; 83. Guide rod; 84. Cutting blade. Detailed Implementation

[0037] The following, in conjunction with Appendices 1-5, provides a further detailed description of this application.

[0038] This application discloses a roof drainage device. (Refer to...) Figure 1 and Figure 2A roof drainage device includes a mounting frame 1, a filter screen 2, a drain pipe 3, a cutting component 4, a stepping component 5, four pushing components 6, a water-gathering component 7, and an auxiliary drainage component 8. The drain pipe 3 is vertically arranged and penetrates the roof, with its upper end flush with the roof. The mounting frame 1 includes a mounting ring 11, a mounting plate 12, four first mounting rods 13, and four second mounting rods 14. The mounting ring 11 is coaxially arranged with the drain pipe 3 and is fixedly mounted on the upper surface of the roof, communicating with the drain pipe 3. The first mounting rods 13 are vertically arranged, and the four first mounting rods 13 are evenly distributed circumferentially along the axis of the mounting ring 11. The lower end of the first mounting rod 13 is fixedly mounted on the upper end of the mounting ring 11. The mounting plate 12 is coaxially arranged with the drain pipe 3 and is fixedly mounted on the upper end of the first mounting rods 13. The four second mounting rods 14 are paired with the four first mounting rods 13. The first mounting rod 13 and the second mounting rod 14 are distributed radially along the mounting ring 11. The upper end face of the second mounting rod 14 is fixedly set on the lower end face of the mounting plate 12. The filter screen 2 is annular and is coaxially arranged with the drain pipe 3. The filter screen 2 is located between the mounting plate 12 and the mounting ring 11. The four first mounting rods 13 are located on the outer side of the filter screen 2, and the four second mounting rods 14 are located on the inner side of the filter screen 2. The filter screen 2 is rotatably connected to the mounting ring 11 along the axis of the filter screen 2. The filter screen 2 has a plurality of filter holes 21 circumferentially opened along the axis of the filter screen 2. The filter holes 21 extend vertically. The cutting component 4 is set on the first mounting rod 13 and is used to cut off the impurities wrapped around the filter holes 21. The stepping component 5 is set on the mounting plate 12 and is used to drive the filter screen 2 to rotate. The auxiliary drainage component 8 is set on the mounting plate 12 and is used to improve the drainage efficiency.

[0039] refer to Figure 2 and Figure 3 The cutting assembly 4 includes four cutting blades 41, four drive units 42, and a rotating unit 43. The rotating unit 43 includes a rotating rod 431, a rotating gear 432, and a spiral blade 433. The rotating rod 431 is coaxially arranged with the drain pipe 3. The upper end of the rotating rod 431 is rotatably connected to the lower end face of the mounting plate 12, and the lower end of the rotating rod 431 passes through the drain pipe 3. The spiral blade 433 is coaxially arranged with the drain pipe 3 and is fixedly arranged on the rotating rod 431. The rotating gear 432 is located above the mounting plate 12 and is coaxially arranged with the rotating rod 431. The rotating gear 432 is fixedly arranged on the rotating rod 431. The rotating gear 432 has four toothless segments 434, which are arranged circumferentially along the axis of the rotating gear 432.

[0040] refer to Figure 2 and Figure 3Four cutting blades 41 are paired with four first mounting rods 13. Each cutting blade 41 group includes two cutting blades 41, which are respectively paired with the first mounting rod 13 and the second mounting rod 14. The cutting blades 41 are vertically arranged with their blades facing the filter screen 2. The two cutting blades 41 are slidably connected to the first mounting rod 13 and the second mounting rod 14 along the radial direction of the mounting plate 12. Four drive units 42 are paired with four cutting blade 41 groups. Each drive unit 42 includes two linkage rods 421, a drive rod 422, a drive gear 423, and a coil spring 424. The two linkage rods 421 are paired with two cutting blades 41. 1. Vertically arranged, the linkage rod 421 is fixedly arranged on the upper end face of the cutting blade 41, the driving rod 422 is horizontally arranged and fixedly arranged on the upper end face of the first mounting rod 13, the driving rod 422 has two sliding grooves 425, the sliding grooves 425 extend along the length direction of the driving rod 422, the two sliding grooves 425 are respectively located on both sides of the rotation axis of the driving rod 422, the two sliding grooves 425 correspond one-to-one with the two linkage rods 421, the linkage rod 421 is slidably connected in the sliding grooves 425, the driving gear 423 is horizontally arranged and fixedly arranged on the rotation axis of the driving rod 422, the driving gear 423 meshes with the rotating gear 432, the coil spring 424 is coaxially arranged with the driving gear 423, one end of the coil spring 424 is fixedly arranged on the driving gear 423, and the other end of the coil spring 424 is fixedly arranged on the upper end face of the first mounting rod 13.

[0041] refer to Figure 2 The water collection component 7 includes a float 71, a cover plate 72, and a conical tube 73. The cover plate 72 is coaxially arranged with the drain pipe 3 and is slidably connected to the rotating rod 431. The cover plate 72 covers the inlet of the drain pipe 3. The float 71 is coaxially arranged with the drain pipe 3 and is fixedly arranged on the upper end surface of the cover plate 72. The float 71 is slidably connected to the rotating rod 431. The conical tube 73 is vertically arranged and coaxially arranged with the drain pipe 3. The conical tube 73 is located inside the drain pipe 3. The upper diameter of the conical tube 73 is larger than the lower diameter of the conical tube 73. The upper end surface of the conical tube 73 is fixedly arranged on the inner side wall of the drain pipe 3. A spiral groove 731 is opened on the surface of the conical tube 73 facing the spiral blade 433.

[0042] refer to Figure 3 and Figure 4Four pushing components 6 are evenly distributed circumferentially along the axis of the filter screen 2. The pushing components 6 are located between two adjacent first mounting rods 13. The four pushing components 6 correspond one-to-one with the four driving parts 42. The pushing components 6 include two pushing plates 61, a bidirectional screw 62 and a pushing gear 63. The two ends of the two pushing plates 61 are slidably connected to the side wall of the first mounting rod 13. The bidirectional screw 62 is vertically arranged. The lower end of the bidirectional screw 62 is rotatably connected to the mounting ring 11, and the upper end face of the bidirectional screw 62 is rotatably connected to the mounting plate 12. The two pushing plates 61 are located on the threaded sections of the bidirectional screw 62 with opposite directions of rotation. The pushing gear 63 is coaxially arranged with the bidirectional screw 62 and is fixedly arranged on the upper end face of the bidirectional screw 62. The pushing gear 63 meshes with the driving gear 423.

[0043] refer to Figure 2 and Figure 5 The stepper assembly 5 includes a rotating disk 51, a stepper wheel 52, a lever 53, a gear 54, a gear ring 55, a first synchronous pulley 56, a second synchronous pulley 57, and a synchronous belt 58. The rotating disk 51 is coaxially arranged with the rotating rod 431 and is fixedly mounted on the rotating rod 431. The lever 53 is vertically arranged and eccentrically mounted on the rotating disk 51. The stepper wheel 52 is horizontally arranged and rotatably connected to the lower end face of the mounting plate 12. Four receiving grooves 521 are provided on the side wall of the stepper wheel 52, extending radially along the stepper wheel 52. 1. A device is used to accommodate the lever 53. The first synchronous pulley 56 is coaxially arranged with the stepper wheel 52. The first synchronous pulley 56 is fixedly arranged on the rotation axis of the stepper wheel 52. The second synchronous pulley 57 is horizontally arranged and rotatably connected to the lower end face of the mounting plate 12. The synchronous belt 58 is sleeved on the first synchronous pulley 56 and the second synchronous pulley 57. The gear 54 is coaxially arranged with the second synchronous pulley 57 and is fixedly arranged on the rotation axis of the second synchronous pulley 57. The gear ring 55 is coaxially arranged with the filter screen 2 and is fixedly arranged on the inner side wall of the filter screen 2. The gear ring 55 meshes with the gear 54.

[0044] refer to Figure 3 and Figure 5The auxiliary drainage assembly 8 includes a float ring 81, several baffle plates 82, several guide rods 83, and four cutting blades 84. Several auxiliary drainage holes 121 are provided on the mounting plate 12, penetrating vertically through the mounting plate 12. Each baffle plate 82 corresponds to one of the auxiliary drainage holes 121 and slides along the radial direction of the mounting plate 12. The float ring 81 is fitted onto four first mounting rods 13, sliding vertically along the first mounting rods 13. Each guide rod 83 corresponds to one of the baffle plates 82. The lower part of the guide rod 83... The guide rod 83 is fixedly mounted on the upper end face of the floating ring 81. The upper end of the guide rod 83 faces the axis of the mounting plate 12. The guide rod 83 passes through the baffle plate 82. The rotating gear 432 has four mating holes 435. The mating holes 435 vertically pass through the rotating gear 432. The four mating holes 435 are evenly distributed circumferentially along the axis of the rotating gear 432. The four cutting blades 84 correspond one-to-one with the four mating holes 435. The length direction of the cutting blades 84 is parallel to the radial direction of the rotating gear 432. The cutting blades 84 are fixedly mounted on the inner side wall of the mating holes 435. The cutting blades 84 abut against the upper end face of the mounting plate 12.

[0045] The implementation principle of a roof drainage device in this embodiment is as follows: The cover plate 72 prevents rainwater from entering the drainage pipe 3. As the rainwater level on the roof gradually increases, the rising water level causes the float 71 to move upwards. The float 71 then moves the cover plate 72 upwards, allowing the rainwater to enter the drainage pipe 3. Guided by the tapered pipe 73, the rainwater's impact speed increases. Guided by the spiral groove 731, the rainwater impacts the spiral blade 433. The spiral blade 433 drives the rotating rod 431 to rotate, which in turn drives the rotating disk 51 to rotate. The actuating rod 53 on the rotating disk 51 drives the stepping wheel 52 to rotate, which in turn drives the gear 54. As the gear 54 rotates, it drives the gear ring 55 to rotate, which in turn drives the filter screen 2 to rotate. At this time, the toothless section 434 of the rotating gear 432 engages with the driving gear 423, causing the driving gear 423 to stop rotating. Then, the spiral blade 433 continues to drive the rotating rod 431 to rotate, causing the actuating rod 53 to move away from the stepper wheel 52, which stops rotating. The filter screen 2 also stops rotating. At this point, the rotating gear 432 meshes with the driving gear 423, which in turn drives the coil spring 424 to accumulate restoring potential energy. The driving gear 423 then drives the driving rod 422 to rotate, which in turn drives the two linkage rods 421 to move closer together. The two linkage rods 421 then bring the two cutting blades 41 closer together. The impurities wrapped around the filter screen 2 are cut off, and at the same time, the gear 423 drives the push gear 63 to rotate. The push gear 63 drives the two push plates 61 to move closer to each other. The push plates 61 concentrate the wrapped impurities, making it easier for the cutting blade 41 to cut them off. Then, the spiral blade 433 continues to drive the rotating rod 431 to rotate, and the actuating rod 53 moves closer to the stepping wheel 52. At this time, the toothless section 434 of the rotating gear 432 engages with the drive gear 423, and the coil spring 424 releases its restoring potential energy. The coil spring 424 drives the drive gear 423 to reverse, and the drive gear 423 drives the drive rod 422 to rotate. The drive rod 422 drives the two cutting blades 41 to move away from each other. The above steps are repeated.

[0046] When there is too much rainwater, causing the drainage speed of filter screen 2 to be less than the water accumulation speed, the rainwater causes the float ring 81 to rise. The float ring 81 causes the guide rod 83 to move upward. The guide rod 83 causes the baffle plate 82 to gradually move away from the axis of the mounting plate 12, and the auxiliary drainage hole 121 on the mounting plate 12 is exposed. Rainwater can enter the drain pipe 3 from the auxiliary drainage hole 121. The rotating gear 432 drives the cutting blade 84 to rotate. The cutting blade 84 removes impurities on the auxiliary drainage hole 121, increasing the drainage capacity of the drainage device. When the drainage speed is greater than the water accumulation speed, the liquid level on the roof gradually drops. The rainwater causes the float ring 81 to drop. The float ring 81 causes the guide rod 83 to move downward. The guide rod 83 causes the baffle plate 82 to block the auxiliary drainage hole 121.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A roof drainage device, characterized in that: The system includes a mounting bracket (1), a filter screen (2), a drain pipe (3), and a cutting assembly (4). The drain pipe (3) is vertically installed and penetrates the roof. The mounting bracket (1) is installed at the inlet of the drain pipe (3). The filter screen (2) is installed on the mounting bracket (1) and has several elongated filter holes (21). The cutting assembly (4) includes two cutting blades (41) and a driving unit (42). The two cutting blades (41) are located on both sides of the filter screen (2). The cutting blade (41) is slidably connected to the mounting bracket (1). The drive unit (42) is used for the two cutting blades (41) to approach each other and pass through the filter hole (21). The drive unit (42) includes two linkage rods (421), a driving rod (422), and a driving gear (423). The two linkage rods (421) correspond one-to-one with the two cutting blades (41). The linkage rods (421) are disposed on the cutting blades (41). The driving rod (422) is rotatably connected to the mounting bracket (1). On the frame (1), the linkage rod (421) is slidably connected to the driving rod (422) along the length direction of the driving rod (422). The two linkage rods (421) are respectively located on both sides of the rotation axis of the driving rod (422). The driving gear (423) is set on the rotation axis of the driving rod (422). The cutting assembly (4) is also provided with a rotating part (43) for driving the driving gear (423) to rotate. The rotating part (43) includes a rotating rod (431). Rotating gear (432) and helical blade (433), one end of rotating rod (431) is rotatably connected to the mounting bracket (1), the other end of rotating rod (431) is inserted into the drain pipe (3), the helical blade (433) is located in the drain pipe (3), the helical blade (433) is disposed on the rotating rod (431), the rotating gear (432) is disposed on the rotating rod (431), and the rotating gear (432) meshes with the driving gear (423).

2. A roof drainage device according to claim 1, characterized in that: The drive unit (42) also includes a coil spring (424), which is disposed on the drive gear (423). The coil spring (424) is used to maintain the distance between the two cutting blades (41). The rotating gear (432) has a toothless section (434) for disengaging from the drive gear (423).

3. A roof drainage device according to claim 1, characterized in that: The filter screen (2) is annular, and a plurality of filter holes (21) are distributed circumferentially along the axis of the filter screen (2). The filter screen (2) is rotatably connected to the mounting frame (1). The mounting frame (1) is provided with a stepping assembly (5) that drives the filter screen (2) to rotate. The stepping assembly (5) includes a rotating disk (51), a stepping wheel (52), a toggle lever (53), a gear (54), a gear ring (55), a first synchronous pulley (56), a second synchronous pulley (57), and a synchronous belt (58). The rotating disk (51) is disposed on the rotating rod (431), the actuating rod (53) is eccentrically disposed on the rotating disk (51), the stepping wheel (52) is rotatably connected to the mounting frame (1), the side wall of the stepping wheel (52) is provided with a plurality of receiving grooves (521) for accommodating the actuating rod (53), the first synchronous wheel (56) is coaxially disposed with the stepping wheel (52), and the first synchronous wheel (56) is fixedly disposed on the rotation axis of the stepping wheel (52). The mounting frame (1) includes a mounting bracket. The installation includes a ring (11), a mounting plate (12), and four first mounting rods (13). The mounting ring (11) is coaxially arranged with the drain pipe (3) and is fixedly mounted on the upper surface of the roof. The first mounting rods (13) are vertically arranged and evenly distributed circumferentially along the axis of the mounting ring (11). The lower end face of the first mounting rod (13) is fixedly mounted on the upper surface of the mounting ring (11). The mounting plate (12) is coaxially arranged with the drain pipe (3) and is fixedly mounted on the upper surface of the roof. On the upper end face of the mounting rod (13), the second synchronous pulley (57) is horizontally set and rotatably connected to the lower end face of the mounting plate (12). The synchronous belt (58) is sleeved on the first synchronous pulley (56) and the second synchronous pulley (57). The gear (54) is coaxially set with the second synchronous pulley (57) and is fixedly set on the rotation axis of the second synchronous pulley (57). The gear ring (55) is set on the filter screen (2) and the gear (54) meshes with the gear ring (55).

4. A roof drainage device according to claim 1, characterized in that: The mounting bracket (1) is provided with a water-gathering component (7) for increasing the impact of water flow on the spiral blade (433). The water-gathering component (7) includes a float (71) and a cover plate (72). The cover plate (72) is slidably connected to the rotating rod (431). The cover plate (72) is used to block the inlet of the drain pipe (3). The float (71) is located on the side of the cover plate (72) away from the drain pipe (3).

5. A roof drainage device according to claim 4, characterized in that: The water collection component (7) also includes a tapered tube (73), which is disposed inside the drain pipe (3). The diameter of the tapered tube (73) facing the inlet end of the drain pipe (3) is larger than the diameter of the tapered tube (73) facing the outlet end of the drain pipe (3). The tapered tube (73) is provided with a spiral groove (731) for guiding rainwater to impact the spiral blade (433).

6. A roof drainage device according to claim 1, characterized in that: The mounting bracket (1) is provided with a pushing assembly (6) for driving the accumulation of impurities on the filter screen (2). The pushing assembly (6) includes two pushing plates (61), a bidirectional screw (62), and a pushing gear (63). The length direction of the bidirectional screw (62) is parallel to the axial direction of the filter screen (2). The two pushing plates (61) are slidably connected to the mounting bracket (1) along the length direction of the bidirectional screw (62). The two pushing plates (61) are respectively threaded to the threaded sections of the bidirectional screw (62) with opposite directions of rotation. The pushing gear (63) is provided on the bidirectional screw (62). The pushing plates (61) abut against the outer wall of the filter screen (2). The pushing gear (63) meshes with the driving gear (423).

7. A roof drainage device according to claim 1, characterized in that: An auxiliary drainage assembly (8) is provided on the mounting frame (1). The auxiliary drainage assembly (8) includes a float ring (81), several baffle plates (82), and several guide rods (83). The float ring (81) is sleeved on the mounting frame (1) and vertically slidably connected to the mounting frame (1). Several auxiliary drainage holes (121) are opened at one end of the mounting frame (1) away from the drain pipe (3). The baffle plates (82) slide along the radial direction of the float ring (81) and are connected to the auxiliary drainage assembly (83). On the mounting bracket (1), a plurality of the baffle plates (82) correspond one-to-one with a plurality of the auxiliary drainage holes (121). The baffle plates (82) are used to block the auxiliary drainage holes (121). The guide rods (83) are disposed on the floating ring (81). A plurality of guide rods (83) correspond one-to-one with a plurality of the baffle plates (82). The guide rods (83) are slidably connected to the baffle plates (82). The guide rods (83) are used to guide the baffle plates (82) away from the auxiliary drainage holes (121).

8. A roof drainage device according to claim 7, characterized in that: The auxiliary drainage assembly (8) also includes a cutting blade (84) disposed on the rotating gear (432) and is used to cut off impurities wrapped around the auxiliary drainage hole (121).

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