A roof rainwater diversion system for the renovation of a confluent riser

Abstract

A roof rainwater diversion system for the renovation of a confluent vertical pipe, comprising a rainwater discharge port opened on the parapet wall and an original vertical pipe penetrating through the roof. A side-entry rainwater bucket is provided at the rainwater discharge port and is connected to a newly built rainwater pipe through the side-entry rainwater bucket. In this device, a water collection tank is arranged above the intercepting pipe. When it rains, the water collection tank collects rainwater, increasing its own weight. The heavier water collection tank exerts pressure on the compression spring, causing it to compress. As a result, the positions of the water collection tank and the intercepting pipe move downward, making the intercepting pipe fit with the roof and closing the drainage holes of the internal connecting pipe to prevent rainwater from entering the original vertical pipe through the drainage holes. When the rain stops, the water collection source of the water collection tank disappears, and the water in the water collection tank will slowly flow out through the weight-reducing drainage holes, reducing its weight. Then, the elastic force of the compression spring stretches, causing the intercepting pipe to rise, so that the rainwater remaining on the roof is discharged through the drainage holes, preventing the remaining rainwater from seeping into the house.

Description

Technical Field

[0001] The present invention relates to the technical field of drainage pipeline renovation, and particularly relates to a roof rainwater diversion system for renovation of combined sewer risers. Background Art

[0002] In old residential areas, a combined sewerage system is mostly adopted, that is, domestic sewage and roof drainage share the same water pipe. When it rains, rainwater will be discharged together with domestic water. The discharged mixed water will be treated by a sewage treatment plant and then discharged into a river. However, conventional rainwater can be discharged into the river without treatment. After rainwater and domestic sewage are mixed and treated, a large amount of mixed sewage will reduce the sewage treatment efficiency of the sewage treatment plant and increase the sewage treatment cost. Therefore, it is necessary to renovate the combined sewerage system.

[0003] The conventional renovation method is to seal the top opening of the original combined sewer riser and use it only as a sewage pipe. At the same time, in order to ensure the drainage capacity of roof rainwater, a new rainwater pipe is opened on the parapet wall of the building (the parapet wall is a low wall around the roof of the building, mainly for safety protection). However, the combined sewer risers in some old residential areas are located at the balconies of households, and protective nets for windows are mostly installed on the outer walls (as Figure 2 shown), so it is impossible to drill holes to install the new rainwater pipe and it needs to be installed at a different position. However, after changing the position, the water inlet of the new rainwater pipe is not the lowest point of the roof (the original combined sewer riser is the lowest point of the roof). Therefore, after heavy rain, water will accumulate on the roof, and it is easy to cause roof leakage over time. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and deficiencies, and provide a roof rainwater diversion system for renovation of combined sewer risers, which can drain the accumulated water on the roof that cannot be drained by the new rainwater pipe and reduce the occurrence of roof seepage.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a roof rainwater diversion system for renovation of combined sewer risers, including a rainwater discharge port opened on the parapet wall and the original riser penetrating through the roof. A side-entry rainwater bucket is provided at the rainwater discharge port and is connected to a new rainwater pipe through the side-entry rainwater bucket. An inner connecting pipe is provided inside the original riser and is attached to the inner wall of the original riser. A plurality of drainage holes are arranged in a circumferential array on the pipe body of the inner connecting pipe that is flush with the roof. A cut-off pipe is provided at the upper end of the inner connecting pipe, and a water collection tank with an open upper end is provided at the upper end of the cut-off pipe. A filter screen is provided to cover the open end of the water collection tank. A compression spring is provided between the upper end of the inner connecting pipe and the lower edge of the water collection tank. A plurality of weight-reducing drainage holes are provided at the lower part of the water collection tank.

[0006] As a further optimization of the roof rainwater diversion system for renovation of combined sewer risers of the present invention, the open end of the water collection tank is a conical opening.

[0007] As a further optimization of the roof rainwater diversion system for the renovation of the combined drainage riser in the present invention, a groove into which the water collection tank is inserted is provided on the side of the filter screen facing the water collection tank.

[0008] As a further optimization of the roof rainwater diversion system for the renovation of the combined drainage riser in the present invention, the pore diameter of the filter holes of the filter screen is 0.5 - 3 cm.

[0009] As a further optimization of the roof rainwater diversion system for the renovation of the combined drainage riser in the present invention, the drainage holes are circular holes, long strip holes or special-shaped holes.

[0010] As a further optimization of the roof rainwater diversion system for the renovation of the combined drainage riser in the present invention, the distance between adjacent drainage holes is 2 - 4 cm.

[0011] As a further optimization of the roof rainwater diversion system for the renovation of the combined drainage riser in the present invention, a hollow rubber pad for buffering is provided at the lower end of the intercepting pipe.

[0012] As a further optimization of the roof rainwater diversion system for the renovation of the combined drainage riser in the present invention, ventilation holes communicating with the original riser are provided in the upper part of the intercepting pipe.

[0013] As a further optimization of the roof rainwater diversion system for the renovation of the combined drainage riser in the present invention, the diameter of the ventilation holes is 3 - 6 cm.

[0014] As a further optimization of the roof rainwater diversion system for the renovation of the combined drainage riser in the present invention, an opening edge is provided at the upper end of the intercepting pipe, one end of a compression spring is connected to the opening edge, and the other end of the compression spring is connected to the lower edge of the water collection tank.

[0015] The present invention has the following beneficial effects:

[0016] By arranging a water collection tank above the intercepting pipe in this device, when it rains, the water collection tank collects rainwater, increasing its own weight. The heavier water collection tank exerts pressure on the compression spring, compressing it. As a result, the positions of the water collection tank and the intercepting pipe move downward, causing the intercepting pipe to fit closely with the roof and closing the drainage holes of the inner connecting pipe to prevent rainwater from entering the original riser through the drainage holes. The water collection tank is provided with weight-reducing drainage holes. When the rain becomes smaller or stops, the water inflow into the water collection tank is less than the water outflow, and the weight of the water collection tank will gradually decrease. Then, the elastic force of the compression spring expands, causing the intercepting pipe to rise, so that the rainwater remaining on the roof is discharged through the drainage holes, preventing the remaining rainwater from seeping into the house. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the diversion system of the present invention;

[0018] Figure 2It is a schematic diagram of the appearance of the community to be renovated in the background technology;

[0019] Reference numerals: 1, roof; 2, original vertical pipe; 3, inner connecting pipe; 4, drainage hole; 5, intercepting pipe; 6, compression spring; 7, ventilation hole; 8, rainwater drain outlet; 9, side-entry rainwater bucket; 10, water collection tank; 11, weight-reducing drainage hole; 12, newly built rainwater pipe; 13, hollow rubber gasket; 14, parapet wall; 15, opening edge; 16, filter screen; 17, groove. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] As Figure 1 shown, the present invention provides a roof rainwater diversion system for the renovation of a combined drainage vertical pipe, including a rainwater drain outlet 8 opened on the parapet wall 14 and an original vertical pipe 2 penetrating through the roof 1. An inner connecting pipe 3 is provided inside the original vertical pipe 2 and is attached and connected to its inner wall. The rainwater drain outlet 8 is used to drain rainwater during rain. However, due to the elevation difference between the rainwater drain outlet 8 and the roof 1, rainwater will remain on the roof 1. To prevent the rainwater from penetrating the roof 1, a plurality of drainage holes 4 are circumferentially arrayed at the pipe body of the inner connecting pipe 3 flush with the roof 1. The drainage holes 4 are used to drain the rainwater remaining on the roof 1.

[0022] Since the mixing of a large amount of rainwater and domestic sewage will increase the treatment pressure of the sewage treatment plant, reduce the sewage treatment efficiency of the sewage treatment plant, and increase the sewage treatment cost, in order to prevent a large amount of rainwater from being drained away through the drainage holes 4 during rain, an intercepting pipe 5 is sleeved on the upper end of the inner connecting pipe 3. During rain, by controlling the intercepting pipe 5 to descend, the lower end surface of the intercepting pipe 5 contacts the roof 1 to seal the drainage holes 4, so that the rainwater cannot be discharged through the drainage holes 4. When the rainfall is too small or after the rain stops, by controlling the intercepting pipe 5 to rise, the drainage holes 4 are exposed, so that the rainwater remaining on the roof 1 is discharged from the drainage holes 4.

[0023] A water collecting box 10 with an open top is provided at the upper end of the intercepting pipe 5, and an opening edge 15 is provided at the upper end of the intercepting pipe 5. One end of the compression spring 6 is connected to the opening edge 15, and the other end of the compression spring 6 is connected to the lower edge of the water collecting box 10. When it rains, rainwater is collected by the water collecting box 10. After rainwater enters the water collecting box 10, the gravity of the water collecting box 10 is increased, thereby squeezing the compression spring 6, compressing its elastic force, so that the water collecting box 10 moves downward with the intercepting pipe 5, so that the intercepting pipe 5 contacts the roof 1, and the drainage hole 4 is sealed, so that when the rainfall is heavy, rainwater cannot be discharged through the drainage hole 4, and the drainage hole 4 is prevented from entering the original vertical pipe 2. A plurality of weight-reducing drainage holes 11 are provided at the lower part of the water collecting box 10, and the water collecting box 10 is provided with a plurality of weight-reducing drainage holes 11. The rainwater in the water tank 10 is discharged through the weight-reducing drainage hole 11. When the rainfall decreases or stops, the water inflow of the water collecting tank 10 is less than the water outflow, and the weight of the water collecting tank 10 will slowly decrease, thereby stretching the elastic force of the compression spring 6, causing the compression spring 6 to rise with the water collecting tank 10 and the intercepting pipe 5, thereby releasing the seal of the intercepting pipe 5 on the drainage hole 4, allowing the rainwater remaining on the roof 1 to enter the original vertical pipe 2 for discharge, thereby preventing water seepage in the walls of the top-floor residents due to long-term retention of rainwater on the roof 1.

[0024] In this embodiment, the open end cover of the water tank 10 is provided with a filter screen 16, and a groove 17 for inserting the water collecting box 10 is provided on the side of the filter screen 16 facing the water collecting box 10. The filter screen 16 can prevent some plastic bags, leaves or other garbage from being blown into the water collecting box 10 due to strong winds, causing their weight to increase or blocking the weight-reducing drainage hole 11 from draining water, hindering the intercepting pipe 5 from moving up. The groove 17 fixes the filter screen 16 to the open end of the water collecting box 10. In order to prevent the filter screen 16 from falling off the water collecting box 10, a rubber pad that increases friction can be embedded in the inner wall of the groove 17. The filter hole diameter of the filter screen 16 is 0.5-3 cm. In this embodiment, the filter hole diameter of the filter screen 16 is 1 cm. The filter screen 16 will not filter dust, so maintenance personnel are required to regularly clean the dust in the water collecting box 10.

[0025] In this embodiment, the open end of the water collecting box 10 is a tapered opening. By setting the tapered opening, the water collecting box 10 has a larger water receiving area.

[0026] In this embodiment, the outer diameter of the inner connecting pipe 3 is equal to the inner diameter of the original vertical pipe 2. After the inner connecting pipe 3 is inserted into the original vertical pipe 2, it is connected to the inner wall of the original vertical pipe 2 by bonding. The drainage hole 4 can be a circular hole, a long hole or a special-shaped hole. In this embodiment, the drainage hole 4 is a circular hole. The spacing between adjacent drainage holes 4 is 2-4 cm. In this embodiment, the spacing between adjacent drainage holes 4 is 4 cm.

[0027] At the lower end of the intercepting pipe 5 in this embodiment, there is a hollow rubber pad 13 for buffering. The lower end of the intercepting pipe 5 is protected by the hollow rubber pad 13 to prevent deformation when the lower end of the intercepting pipe 5 moves downward and collides with the roof 1. Moreover, the setting of the hollow rubber pad 13 can also ensure the sealing between the lower end of the intercepting pipe 5 and the roof 1.

[0028] In this embodiment, a side-inlet rainwater bucket 9 is provided at the rainwater drain opening 8 and is connected to the newly built rainwater pipe 12 through the side-inlet rainwater bucket 9. Rainwater on rainy days is discharged through the newly built rainwater pipe 12.

[0029] Meanwhile, in this embodiment, a ventilation hole 7 communicating with the original riser pipe 2 is provided at the upper part of the intercepting pipe 5 to ensure the air circulation of the original riser pipe 2 and ensure smooth drainage of the original riser pipe 2. The diameter of the ventilation hole 7 is 3 - 6 cm. In this embodiment, the diameter of the ventilation hole 7 is 6 cm.

[0030] In this device, a water collection tank 10 is arranged above the intercepting pipe 5. When it rains, when the rainfall collected by the water collection tank 10 is greater than the drainage volume of the weight-reducing drainage hole 11, the water collection tank 10 collects rainwater and its own weight increases. The heavier water collection tank 10 will exert pressure on the compression spring 6 to compress it, so that the positions of the water collection tank 10 and the intercepting pipe 5 move downward, making the intercepting pipe 5 fit with the roof 1 and closing the drainage hole 4 of the inner connecting pipe 3 to prevent rainwater from entering the original riser pipe 2 through the drainage hole 4. The water collection tank 10 is provided with a weight-reducing drainage hole 11. When the rainfall decreases or the rain stops, the water inflow of the water collection tank 10 is less than the water outflow, and the weight of the water collection tank 10 will slowly decrease, enabling the elastic force of the compression spring 6 to stretch, making the intercepting pipe 5 rise, so that the rainwater remaining on the roof 1 is discharged through the drainage hole 4, preventing the remaining rainwater from seeping into the house.

[0031] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various deformations or modifications within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. A roof rainwater diversion system for the renovation of a confluent riser, comprising a rainwater discharge port (8) opened on a parapet wall (14) and an original riser (2) passing through a roof (1). A side-entry rainwater inlet (9) is provided at the rainwater discharge port (8) and is connected to a newly built rainwater pipe (12) through the side-entry rainwater inlet (9), and is characterized in that: An inner connecting pipe (3) is arranged inside the original riser pipe (2) and is in fitting connection with the inner wall thereof. A plurality of drain holes (4) are arranged in a circumferential array along the pipe body of the inner connecting pipe (3) that is flush with the roof (1). A cut-off pipe (5) is sleeved on the upper end of the inner connecting pipe (3). A water collecting tank (10) with an open upper end is arranged at the upper end of the cut-off pipe (5). A filter screen (16) is sleeved on the open end of the water collecting tank (10). A compression spring (6) is arranged between the upper end of the inner connecting pipe (3) and the lower edge of the water collecting tank (10). A plurality of weight-reducing drainage holes (11) are arranged at the lower part of the water collecting tank (10); The open end of the water collecting tank (10) is a conical opening; A groove (17) for inserting the open end of the water collecting tank (10) is arranged on the side of the filter screen (16) facing the water collecting tank (10).

2. The roof rainwater diversion system for the renovation of the confluence riser according to claim 1, wherein: The aperture of the filter holes of the filter screen (16) is 0.5 - 3 cm.

3. The roof rainwater diversion system for the renovation of the confluent riser according to claim 1, wherein: The drain holes (4) are round holes, long strip holes or special-shaped holes.

4. A roof rainwater diversion system for the renovation of a confluent riser according to claim 1, characterized in that: The distance between adjacent drain holes (4) is 2 - 4 cm.

5. A roof rainwater diversion system for the renovation of a confluent riser, characterized in that: A hollow rubber pad (13) for buffering is arranged at the lower end of the cut-off pipe (5).

6. The roof rainwater diversion system for the renovation of the confluence riser according to claim 1, characterized in that: Vent holes (7) communicating with the original riser pipe (2) are arranged at the upper part of the cut-off pipe (5).

7. A roof rainwater diversion system for the retrofit of a confluent riser, characterized in that: The diameter of the vent holes (7) is 3 - 6 cm.

8. A roof rainwater diversion system for the renovation of a confluent vertical pipe according to claim 1, characterized in that: An opening edge (15) is arranged at the upper end of the cut-off pipe (5). One end of the compression spring (6) is connected to the opening edge (15), and the other end of the compression spring (6) is connected to the lower edge of the water collecting tank (10).

Images