A roof secondary drainage device

Abstract

The application discloses a roof secondary drainage device and relates to the technical field of secondary drainage. Through a rainwater bucket, accumulated water can be directly drained, and a siphon effect can be formed to accelerate the speed of drainage, so that the accumulated water on the roof can be rapidly drained away. Through a first filter screen, sundries in water are filtered. Through a second filter screen of an adjusting unit, the water has sufficient thrust to push the sundries on the first filter screen to a collecting box, so that the first filter screen is prevented from being blocked. Through a brush, the inner wall of a drainage pipe is cleaned, so that the inner wall is kept smooth, and the accumulated water can smoothly flow out. Through a water collecting box, seepage water between a first waterproof layer and a second waterproof layer is collected and drained.

Description

Technical Field

[0001] This invention relates to the field of secondary drainage technology, specifically a roof secondary drainage device. Background Technology

[0002] Secondary roof drainage is the second line of defense for roof drainage. It is used to reduce the drainage pressure on the main drainage pipe, reduce the risk of blockage, and ensure that water can still be effectively drained when the main drainage system fails.

[0003] Roof waterproofing often employs a combination of rigid and flexible waterproofing methods. Secondary drainage devices can remove water accumulation on and between the waterproofing layers, reducing the pressure of water on the waterproofing layer and extending its service life. However, traditional secondary drainage devices lack backflow prevention structures, which can easily lead to backflow when the drainage volume is large. This causes water to return to the filling layer between the waterproofing layers, which can damage the waterproofing layer over time and cause leaks.

[0004] Traditional roof secondary drainage uses a rod on the rainwater hopper to initially filter debris from the water, and then sets up a filter screen inside the pipe to filter out even smaller debris. However, the filtered debris will accumulate on the filter screen and needs to be cleaned regularly. Otherwise, if there is a lot of debris over a long period of time, it will clog the drain pipe, affect the drainage efficiency of the drainage system, and even cause the drainage system to malfunction. Summary of the Invention

[0005] The purpose of this invention is to provide a secondary drainage device for roofs to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A roof secondary drainage device includes a first drainage mechanism, a second drainage mechanism, and a main drainage pipe. The first drainage mechanism and the main drainage pipe are fixedly connected, and the second drainage mechanism and the main drainage pipe are also fixedly connected.

[0008] The No. 1 drainage mechanism includes a rainwater hopper, a No. 1 drainage pipe, a No. 1 filter screen, a collection box, an adjustment unit, a cleaning unit, and a filter plate. The rainwater hopper and the No. 1 drainage pipe are fixedly connected. The No. 1 drainage pipe has a No. 1 through groove, and the No. 1 filter screen is placed in the No. 1 through groove. The collection box and the No. 1 drainage pipe are fixedly connected. The adjustment unit and the No. 1 filter screen are fixedly connected. The cleaning unit and the adjustment unit are fixedly connected. The cleaning unit is placed in the No. 1 through groove. The No. 1 drainage pipe has a collection groove, and the filter plate is placed in the collection groove. The filter plate and the No. 1 filter screen are fixedly connected. The No. 1 drainage pipe is connected to the main drainage pipe.

[0009] The No. 1 drainage system guides surface water into the main drainage pipe. The No. 2 drainage system guides seepage water between the first and second waterproofing layers into the main drainage pipe. The main drainage pipe collects surface water and groundwater seepage, directing it to designated discharge points. Rainwater flows into the No. 1 drainage pipe through rainwater hoppers. Through the No. 1 filter screen, debris is filtered out. The filtered debris flows to a collection box, where it is collected to prevent pipe blockage. Finally, a filter plate separates the debris from the water. The water flowing into the collection box can return to the pipe, ensuring that the water flowing into the collection box does not affect the collection of debris. The filter plate and the No. 1 filter screen are fixedly connected, fixing the No. 1 filter screen in the No. 1 channel. The flow rate of water through the No. 1 filter screen is adjusted by the regulating unit to balance the debris interception and drainage speed, so that the drainage can effectively flush the debris to the collection box, reducing the risk of blockage. The cleaning unit reduces the accumulation of dirt on the inner wall of the pipe, prevents pipe blockage, and makes the inner wall of the No. 1 channel smoother, reducing water flow resistance and allowing water to flow more smoothly, thereby improving drainage efficiency.

[0010] Furthermore, the adjustment unit includes a second filter screen, a first fixed rod, a first connecting rod, a second connecting rod, a first spring, a first slider, and a second slider. The second filter screen is fixedly connected to the first fixed rod, and the first fixed rod abuts against the first filter screen. There are several first connecting rods, and the first connecting rod is hinged to the first fixed rod. There are several second connecting rods, and the second connecting rod is hinged to the first connecting rod. The second connecting rod is fixedly connected to the second slider. The first spring is fixedly connected to the second slider, the first slider is fixedly connected to the first spring, and the first slider is fixedly connected to the second connecting rod.

[0011] The No. 2 filter comes into contact with the No. 1 filter, and their filter holes are connected. Water flows through the filter holes of the No. 1 filter and then through the filter holes of the No. 2 filter. The No. 2 filter has fewer filter holes than the No. 1 filter, ensuring sufficient flow force to flush debris to the collection box even with low drainage volumes. The No. 2 filter is made of waterproof fabric. However, with high drainage volumes, the water impacts the surface of the No. 2 filter from the No. 1 filter, causing it to contract towards the axis of the No. 1 fixed rod. This, in turn, causes the No. 1 connecting rod to rotate along the hinge connected to the No. 1 fixed rod. This allows the No. 2 connecting rod and the No. 1 slider to slide downwards together, allowing more water to flow through the filter holes of the No. 1 filter, increasing the drainage area and improving drainage efficiency. The downward sliding of the No. 1 slider compresses the No. 1 spring. When the drainage volume decreases, the compressed potential energy of the No. 1 spring is released, causing the No. 2 connecting rod and the No. 1 slider to slide upwards together, thus resetting the No. 2 filter. The No. 2 slider then provides support for the No. 1 spring.

[0012] Furthermore, the cleaning unit includes a brush, a second fixing rod, a second spring, a locking block, and a third slider. The brush and the second fixing rod are fixedly connected, the outer ring of the brush is slidably connected to the first through groove, the second spring is sleeved on the first fixing rod, and the locking block is fixedly connected to the first fixing rod.

[0013] The brush cleans the inner wall of the No. 1 channel. When the drainage volume is large, the brush slides in the No. 1 channel along the water flow direction under the force of the water. The outer ring of the brush contacts the inner wall of the No. 1 channel to clean it. The No. 2 fixing rod and the No. 3 slider move together with the brush. The No. 2 spring is compressed by the No. 3 slider and fixed by the locking block. When the drainage volume decreases, the No. 2 spring releases its potential energy, causing the No. 2 fixing rod, the No. 3 slider and the brush to reset and clean the inner wall of the No. 1 channel again.

[0014] Furthermore, the second drainage mechanism includes a water collection box, a second drainage pipe, a connecting pipe, a fixing block, and a baffle. The water collection box and the second drainage pipe are fixedly connected, the connecting pipe and the second drainage pipe are fixedly connected, the fixing block and the second drainage pipe are fixedly connected, the baffle and the fixing block are hingedly connected, and the connecting pipe is connected to the main drainage pipe.

[0015] The water collection box collects the leaking water between the first and second waterproof layers. The leaking water flows into the connecting pipe through the No. 2 drain pipe, which is U-shaped with the inlet higher than the outlet. The connecting pipe is connected by a fixing block and a baffle hinge. The baffle abuts against the pipe wall of the No. 2 drain pipe outlet, so that the baffle can only rotate in the direction of the main drain pipe, thus allowing the water to flow only in one direction to the main drain pipe.

[0016] Furthermore, the first filter screen is conical in shape and has a conical groove, while the second filter screen is placed inside the conical groove.

[0017] By setting the No. 1 filter screen in a conical shape, water on the surface of the No. 1 filter screen flows towards the bottom of the cone. When debris or dust appears on the surface of the No. 1 filter screen, it is carried by the water to the inner wall of the No. 1 drain pipe and flows into the collection tank. By placing the No. 2 filter screen in the conical groove, the No. 2 filter screen and the conical groove come into contact, thereby sealing some of the filter holes on the No. 1 filter screen. This ensures that even when the drainage volume is small, there is still enough water to move debris or dust.

[0018] Furthermore, the No. 1 drainage pipe is equipped with several guide grooves, which are spiral in shape.

[0019] By installing several guide channels in the No. 1 drain pipe, which are spiral in shape, the direction of water flow is changed, causing debris or dust appearing on the No. 1 filter screen to flow into the collection tank, thus preventing debris or dust from getting stuck in the area between the No. 1 filter screen and the inner wall of the No. 1 drain pipe.

[0020] Furthermore, the rainwater hopper includes a filter rod, a top cover, a hopper body, a guide tube, and a support plate. The filter rod and the top cover are connected by pipes, and the filter rod and the hopper body are fixedly connected. The hopper body is provided with a flow straightening groove, the support plate is placed in the flow straightening groove, the guide tube is placed in the flow straightening groove, the guide tube and the support plate are fixedly connected, the top cover is provided with a flow straightening groove, and the upper part of the guide tube is placed in the flow straightening groove.

[0021] The filter rod allows water from the roof surface to flow into the hopper, where impurities are initially filtered out. A guide tube is installed on the support plate placed in the rectifier trough. The guide tube is fixedly connected to the top cover and the filter rod, with the upper part of the guide tube placed in the guide trough of the top cover, thus forming an inverted U-shaped tube structure. When there is a large drainage volume, the water overflows the top cover, creating a siphon effect and accelerating the drainage speed.

[0022] Furthermore, the guide tube is provided with a second through groove and a third through groove. The second and third through grooves are connected, and the third through groove is connected to the rectifying groove.

[0023] The guide tube has a second channel, which allows water to flow directly into the third channel. The third channel is connected to the rectifier channel, so there is no need to wait for the water level to rise to form a siphon drainage. When the drainage volume is small, the water on the roof can be quickly drained away by gravity.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. By setting the No. 1 filter screen in a conical shape, water on the surface of the No. 1 filter screen flows towards the bottom of the cone, carrying debris and dust on it towards the inner wall of the No. 1 drain pipe. By setting several guide grooves in the No. 1 drain pipe, the direction of water flow is changed, allowing debris on the filter screen to flow into the collection box. This prevents debris or dust from getting stuck in the area between the No. 1 filter screen and the inner wall of the No. 1 drain pipe, ensuring that the No. 1 filter screen is free of debris and preventing debris from clogging the filter holes.

[0026] 2. By connecting the No. 2 filter screen with the No. 1 filter screen, the filter holes of the No. 1 filter screen are partially sealed, allowing more water to flow around the No. 1 filter screen. When the drainage volume is small, ensure that there is enough water flow to create thrust, causing debris or dust on the No. 1 filter screen to flow into the collection box. When the drainage volume is large, the No. 2 filter screen retracts towards the axis, so that the filter holes of the No. 1 filter screen are no longer sealed, ensuring the drainage effect.

[0027] 3. By installing a guide tube on the rainwater hopper and using a top cover to form an inverted U-shaped structure, when the drainage volume is large, the water submerges the top cover, creating a siphon effect and accelerating the drainage efficiency. A second channel is installed on the guide tube, allowing water to flow directly into the pipe through the second channel when the drainage volume is small, without waiting for the water level to rise, thus quickly removing accumulated water.

[0028] 4. The water collection box collects the leaking water between the first and second waterproof layers and drains it through the No. 2 drain pipe. The baffle is connected by a fixing block and a hinge, and the baffle abuts against the pipe wall of the No. 2 drain pipe outlet, so that the baffle can only rotate in the direction of the main drain pipe, thus ensuring that the water can only flow to the main drain pipe in one direction and preventing backflow of water.

[0029] 5. Using a brush, the inner wall of the pipe is cleaned by the force of the drainage, ensuring its smoothness and preventing dirt from accumulating on the inner wall over time, which would hinder drainage and affect its efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the first drainage mechanism of the present invention;

[0032] Figure 3 yes Figure 2 A magnified view of part A;

[0033] Figure 4 yes Figure 2 A magnified view of part B;

[0034] Figure 5 yes Figure 2 A magnified view of a portion of C;

[0035] Figure 6 This is a schematic diagram of the No. 1 filter screen structure of the present invention;

[0036] Figure 7 This is a schematic diagram of the second filter screen structure of the present invention.

[0037] In the diagram: 1. Drainage mechanism No. 1; 11. Rainwater hopper; 111. Filter rod; 112. Top cover; 1121. Guide channel; 113. Hopper body; 114. Guide cylinder; 1141. Second channel; 115. Support plate; 12. Drainage pipe No. 1; 121. First channel; 122. Collection tank; 123. Guide channel; 13. First filter screen; 131. Conical groove; 14. Collection box; 15. Adjustment unit; 151. Second filter screen; 152. First solid... 1. Fixed rod; 153. Connecting rod No. 1; 154. Connecting rod No. 2; 155. Spring No. 1; 156. Slider No. 1; 157. Slider No. 2; 16. Cleaning unit; 161. Brush; 162. Fixed rod No. 2; 163. Spring No. 2; 164. Locking block; 165. Slider No. 3; 17. Filter plate; 2. Drainage mechanism No. 2; 21. Water collection box; 22. Drainage pipe No. 2; 23. Connecting pipe; 24. Fixed block; 25. Baffle; 3. Main drain pipe. Detailed Implementation

[0038] 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.

[0039] Example: Figures 1-7 As shown, the present invention provides a technical solution for a secondary roof drainage device. The secondary roof drainage device includes a first drainage mechanism 1, a second drainage mechanism 2, and a main drainage pipe 3. The first drainage mechanism 1 and the main drainage pipe 3 are fixedly connected, and the second drainage mechanism 2 and the main drainage pipe 3 are fixedly connected.

[0040] The No. 1 drainage mechanism 1 includes a rainwater hopper 11, a No. 1 drainage pipe 12, a No. 1 filter screen 13, a collection box 14, an adjustment unit 15, a cleaning unit 16, and a filter plate 17. The rainwater hopper 11 and the No. 1 drainage pipe 12 are fixedly connected. The No. 1 drainage pipe 12 is provided with a No. 1 through groove 121. The No. 1 filter screen 13 is placed in the No. 1 through groove 121. The collection box 14 and the No. 1 drainage pipe 12 are fixedly connected. The adjustment unit 15 is placed in the No. 1 through groove 121. The adjustment unit 15 and the No. 1 filter screen 13 are fixedly connected. The cleaning unit 16 and the adjustment unit 15 are fixedly connected. The No. 1 drainage pipe 12 is provided with a collection trough 122. The filter plate 17 is placed in the collection trough 122. The filter plate 17 and the No. 1 filter screen 13 are fixedly connected. The No. 1 drainage pipe 12 is connected to the main drainage pipe 3.

[0041] Water from the ground is guided into the main drain pipe 3 via drainage mechanism 1 (number one). Water seeping between the first and second waterproofing layers is guided into the main drain pipe 3 via drainage mechanism 2 (number two). The main drain pipe 3 collects the surface water and groundwater seepage, directing it to a designated discharge point. Water from the ground flows into the first drain pipe 12 via rainwater hopper 11. Impurities in the water are filtered out by the first filter screen 13. The filtered impurities flow into the collection box 14 under the influence of the water flow, preventing blockages. Finally, the impurities, along with the water, flow into the collection box 14 through the filter plate 17. Water in the collection box 14 can return to the pipe, ensuring that the water flowing into the collection box 14 does not affect the collection of debris. The filter plate 17 and the first filter screen 13 are fixedly connected, fixing the first filter screen 13 in the first channel 121. The flow rate of water through the first filter screen 13 is adjusted by the adjustment unit 15 to balance the debris interception and drainage speed, so that the drainage can effectively flush the debris to the collection box 14, reducing the risk of blockage. The cleaning unit 16 reduces the accumulation of dirt on the inner wall of the pipe, prevents pipe blockage, and makes the inner wall of the first channel 121 smoother, reducing water flow resistance and allowing water to flow more smoothly, thereby improving drainage efficiency.

[0042] like Figures 2-7 As shown, the adjustment unit 15 includes a second filter screen 151, a first fixing rod 152, a first connecting rod 153, a second connecting rod 154, a first spring 155, a first slider 156, and a second slider 157. The second filter screen 151 and the first fixing rod 152 are fixedly connected, and the first fixing rod 152 abuts against the first filter screen 157. Several first connecting rods 153 are provided, and the first connecting rod 153 and the first fixing rod 152 are hinged together. Several second connecting rods 154 are provided, and the second connecting rod 154 and the first connecting rod 153 are hinged together. The second connecting rod 154 and the second slider 157 are fixedly connected. The first spring 155 and the second slider 157 are fixedly connected. The first slider 156 and the first spring 155 are fixedly connected. The first slider 156 and the second connecting rod 154 are fixedly connected.

[0043] The second filter screen 151 abuts against the first filter screen 13, and the filter holes of the second filter screen 151 and the first filter screen 13 are connected. Water flows through the filter holes of the first filter screen 13 and then through the filter holes of the second filter screen 151. The second filter screen 151 has fewer filter holes than the first filter screen 13, ensuring sufficient flow force to flush debris to the collection box 14 even with small drainage volumes. The second filter screen 151 is made of waterproof fabric. However, with larger drainage volumes, the water will impact the surface of the second filter screen 151 from the first filter screen 13, causing the second filter screen 151 to retract towards the axis of the first fixing rod 152. This causes the first connecting rod 153 to rotate along the hinge connected to the first fixed rod 152, causing the second connecting rod 154 and the first slider 156 to slide downwards together. This allows water to flow through more filter holes on the first filter screen 13, thereby increasing the drainage area and improving drainage efficiency. The first slider 156 slides downwards, compressing the first spring 155. When the drainage volume decreases, the potential energy of the first spring 155 is released, causing the second connecting rod 154 and the first slider 156 to slide upwards together. This resets the second filter screen 151, and the second slider 157 provides support for the first spring 155.

[0044] like Figures 2-4 As shown, the cleaning unit 16 includes a brush 161, a second fixing rod 162, a second spring 163, a locking block 164, and a third slider 165. The brush 161 and the second fixing rod 162 are fixedly connected. The outer ring of the brush 161 is slidably connected to the first through groove 121. The second spring 163 is sleeved on the first fixing rod 152. The locking block 164 is fixedly connected to the first fixing rod 152.

[0045] The brush 161 cleans the inner wall of the first channel 121. When the drainage volume is large, the brush 161 slides in the first channel 121 along the water flow direction under the force of the water. The outer ring of the brush 161 contacts the inner wall of the first channel 121 to clean it. The second fixing rod 162 and the third slider 165 move together with the brush 161. The third slider 165 compresses the second spring 163. The second spring 163 is fixed by the locking block 164. When the drainage volume decreases, the second spring 163 releases potential energy, causing the second fixing rod 162, the third slider 165 and the brush 161 to reset and clean the inner wall of the first channel 121 again.

[0046] like Figure 2 and Figure 5 As shown, the second drainage mechanism 2 includes a water collection box 21, a second drainage pipe 22, a connecting pipe 23, a fixing block 24, and a baffle 25. The water collection box 21 and the second drainage pipe 22 are fixedly connected, the connecting pipe 23 and the second drainage pipe 22 are fixedly connected, the fixing block 24 and the second drainage pipe 22 are fixedly connected, the baffle 25 and the fixing block 24 are hinged, and the connecting pipe 23 is connected to the main drainage pipe 3.

[0047] The water collection box 21 collects the leakage water between the first and second waterproof layers. The leakage water flows into the connecting pipe 23 through the second drain pipe 22, which is set as a U-shaped pipe with the inlet higher than the outlet. The pipe is hinged to the fixing block 24 and the baffle 25. The baffle 25 abuts against the pipe wall of the outlet of the second drain pipe 22, so that the baffle 25 can only rotate in the direction of the main drain pipe 3, thus allowing the water to flow only in one direction to the main drain pipe 3.

[0048] like Figure 3 As shown, the first filter screen 13 is conical in shape and has a conical groove 131. The second filter screen 151 is placed inside the conical groove 131.

[0049] By setting the first filter screen 13 into a cone shape, water on the surface of the first filter screen 13 flows towards the bottom of the cone. When debris or dust appears on the surface of the first filter screen 13, it flows with the water to the inner wall of the first drain pipe 12 and into the collection tank 122. By placing the second filter screen 151 in the conical groove 131, the second filter screen 151 and the conical groove 131 abut against each other, thereby sealing part of the filter holes on the first filter screen 13. This ensures that even when the drainage volume is small, there is still enough water to move debris or dust.

[0050] like Figure 2 As shown, the No. 1 drain pipe 12 is provided with several guide grooves 123, which are spiral in shape.

[0051] By providing several guide grooves 123 in the first drain pipe 12, the guide grooves 123 are spiral-shaped, thereby changing the direction of water flow and causing debris or dust appearing on the first filter screen 13 to flow to the collection groove 122, thus preventing debris or dust from getting stuck in the area between the first filter screen 13 and the inner wall of the first drain pipe 12.

[0052] like Figure 2 As shown, the rainwater hopper 11 includes a filter rod 111, a top cover 112, a hopper body 113, a guide tube 114, and a support plate 115. The filter rod 111 and the top cover 112 are connected by pipes. The filter rod 111 and the hopper body 113 are fixedly connected. The hopper body 113 is provided with a flow straightening groove. The support plate 115 is placed in the flow straightening groove. The guide tube 114 is placed in the flow straightening groove. The guide tube 114 and the support plate 115 are fixedly connected. The top cover 112 is provided with a flow straightening groove 1121. The upper part of the guide tube 114 is placed in the flow straightening groove 1121.

[0053] When water from the roof surface flows to the hopper 113 via the filter rod 111, impurities in the water are initially filtered out. The guide tube 114 is installed on the support plate 115 placed in the rectifier trough. The top cover 112 and the filter rod 111 are fixedly connected, so that the upper part of the guide tube 114 is placed in the guide groove 1121 of the top cover 112, thus forming an inverted U-shaped tube structure. When there is a large drainage volume, the water floods the top cover 112, thus forming a siphon effect and accelerating the drainage speed.

[0054] like Figure 2 As shown, the guide tube 114 is provided with a second through groove 1141 and a third through groove. The second through groove 1141 and the third through groove are connected, and the third through groove is connected to the rectifier groove.

[0055] The guide tube 114 is equipped with a second channel 1141, which allows water to flow directly into the third channel. The third channel is connected to the rectifier channel, so there is no need to wait for the water level to rise to form a siphon drainage. When the drainage volume is small, the water on the roof can be quickly drained away by gravity drainage.

[0056] Working principle: Rainwater is collected from the roof surface through the rain hopper 11. Impurities in the water are initially filtered out by the filter rod 111. The water then flows through the guide tube 114, which is placed in the guide groove 1121 of the top cover 112. When there is a large drainage volume, the water overflows the top cover 112, creating a siphon effect and accelerating drainage. When the drainage volume is small, the water is quickly discharged by gravity through the second channel 1141. The water then flows into the first drain pipe 12 through the rectifier channel. The first filter screen 13 is cone-shaped, causing water on its surface to flow towards the bottom of the cone. Impurities or dust on the first filter screen 13 flow to the collection trough 122 through the guide groove 123, thus allowing the impurities and dust to flow into the collection trough 122 connected to the collection box 14. The filter plate 17 separates the water and impurities, allowing them to flow back into the pipe, ensuring that the water flowing into the collection box 14 does not affect the drainage system. The collection of debris is achieved by fixing the filter plate 17 and the first filter screen 13 together, thus fixing the first filter screen 13 in the first channel 121. The second filter screen 151 is used to adjust the number of filter holes of the first filter screen 13 according to the drainage volume, thereby controlling the drainage flow rate and enabling the drainage to effectively flush the debris to the collection box 14. The brush 161 cleans the inner wall of the pipe, reducing water flow resistance and improving drainage efficiency. The first drain pipe 12 is connected to the main drain pipe 3, allowing the accumulated water to be discharged to the designated location. The water collection box 21 collects the leakage water between the first and second waterproof layers. The leakage water flows into the connecting pipe 23 through the second drain pipe 22. The fixing block 24 and the baffle 25 are hinged together, and the baffle 25 abuts against the pipe wall of the outlet of the second drain pipe 22, so that the baffle 25 can only rotate in the direction of the main drain pipe 3, thus allowing the water to flow only in one direction to the main drain pipe 3.

[0057] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A secondary drainage device for a roof, characterized by: The secondary drainage device comprises a first drainage mechanism (1), a second drainage mechanism (2) and a total drainage pipe (3), the first drainage mechanism (1) and the total drainage pipe (3) are fixedly connected, and the second drainage mechanism (2) and the total drainage pipe (3) are fixedly connected. The first drainage mechanism (1) comprises a rainwater hopper (11), a first drainage pipe (12), a first filter screen (13), a collection box (14), an adjusting unit (15), a cleaning unit (16) and a filter hole plate (17), the rainwater hopper (11) and the first drainage pipe (12) are fixedly connected, the first drainage pipe (12) is provided with a first through groove (121), the first filter screen (13) is arranged in the first through groove (121), the collection box (14) and the first drainage pipe (12) are fixedly connected, the adjusting unit (15) is arranged in the first through groove (121), the adjusting unit (15) and the first filter screen (13) are fixedly connected, the cleaning unit (16) and the adjusting unit (15) are fixedly connected, the cleaning unit (16) is arranged in the first through groove (121), the first drainage pipe (12) is provided with a collection groove (122), the filter hole plate (17) is arranged in the collection groove (122), and the filter hole plate (17) and the first filter screen (13) are fixedly connected. The adjusting unit (15) comprises a second filter screen (151), a first fixed rod (152), a first connecting rod (153), a second connecting rod (154), a first spring (155), a first sliding block (156) and a second sliding block (157), the second filter screen (151) and the first fixed rod (152) are fixedly connected, the first fixed rod (152) and the first filter screen (13) are abutted, a plurality of first connecting rods (153) are arranged, the first connecting rod (153) and the first fixed rod (152) are hingedly connected, a plurality of second connecting rods (154) are arranged, the second connecting rod (154) and the first connecting rod (153) are hingedly connected, the second connecting rod (154) and the second sliding block (157) are fixedly connected, the first spring (155) and the second sliding block (157) are fixedly connected, the first sliding block (156) and the first spring (155) are fixedly connected, and the first sliding block (156) and the second connecting rod (154) are fixedly connected.

2. A secondary drainage device for a roof according to claim 1, wherein: The cleaning unit (16) comprises a brush (161), a second fixed rod (162), a second spring (163), a clamping block (164) and a third sliding block (165), the brush (161) and the second fixed rod (162) are fixedly connected, the brush (161) is slidably connected with the first through groove (121), the second spring (163) is sleeved on the first fixed rod (152), and the clamping block (164) and the first fixed rod (152) are fixedly connected.

3. A secondary drainage device for a roof according to claim 2, wherein: The second drainage mechanism (2) comprises a water collecting box (21), a second drainage pipe (22), a connecting pipe (23), a fixing block (24) and a baffle (25), the water collecting box (21) is fixedly connected with the second drainage pipe (22), the connecting pipe (23) is fixedly connected with the second drainage pipe (22), the fixing block (24) is fixedly connected with the second drainage pipe (22), the baffle (25) is hingedly connected with the fixing block (24), and the connecting pipe (23) is communicated with the total drainage pipe (3).

4. A secondary drainage device for a roof according to claim 3, wherein: The first filter screen (13) is conical, the first filter screen (13) is provided with a conical groove (131), and the second filter screen (151) is arranged in the conical groove (131).

5. A secondary drainage device for a roof according to claim 4, wherein: The first drainage pipe (12) is provided with a plurality of guide grooves (123), and the guide grooves (123) are spiral.

6. A secondary drainage device for a roof according to claim 5, wherein: The rainwater bucket (11) comprises a filtering rod (111), a top cover (112), a bucket body (113), a flow guide cylinder (114) and a supporting plate (115), the filtering rod (111) and the top cover (112) are connected in pipeline, the filtering rod (111) and the bucket body (113) are fixedly connected, the bucket body (113) is provided with a flow regulating groove, the supporting plate (115) is arranged in the flow regulating groove, the flow guide cylinder (114) is arranged in the flow regulating groove, the flow guide cylinder (114) and the supporting plate (115) are fixedly connected, the top cover (112) is provided with a flow guide groove (1121), and the upper portion of the flow guide cylinder (114) is arranged in the flow guide groove (1121).

7. A secondary drainage device for a roof according to claim 6, wherein: The flow guide cylinder (114) is provided with a second through groove (1141) and a third through groove, the second through groove (1141) and the third through groove are communicated, and the third through groove and the flow regulating groove are communicated.

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