Method and device for preventing downpipe from freezing
By setting up deflectors and other devices in front of the downwater pipe to change the water flow state, the problem of icing downwater pipes is solved, and efficient and energy-saving drainage effect is achieved. It is suitable for townhouse greenhouses and building roof drainage systems.
Patent Information
- Application Number
- CN202510651902.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-20
- Publication Date
- 2025-07-29
AI Technical Summary
In severe and cold areas, in roof drainage systems, downshui pipes are prone to freezing due to low temperature environments that cause water to flow along the pipe wall, causing blockage, and traditional electric heating equipment has high energy consumption and poses safety hazards.
In front of the downspout pipe, an integrated device for deflectors, water barriers, slots and lower tubes are installed to change the water flow state to make it a free fall, avoid contact with the pipe wall, use polyvinyl chloride, polyethylene, fiberglass or metal materials and coated with black paint to absorb solar radiation to increase the temperature.
Effectively prevent downwater pipes from freezing, reduce icing risks, reduce energy consumption, improve drainage efficiency, avoid safety hazards, and adapt to extreme climatic conditions.
Smart Images
Figure CN120384613A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of external drainage of buildings such as roofs or greenhouses, and specifically to a method and device for preventing downspouts from freezing, which is applicable to the drainage systems of multi-span greenhouses or building roofs. Background Art
[0002] In civil buildings in cold and severe cold regions of our country, organized external drainage forms are mostly adopted for the roof. However, phenomena such as the freezing and blockage of drainage outlets and the bursting of drainage pipes (downspouts) caused by low temperatures or freeze-thaw cycles are relatively common, which undoubtedly increases the requirements for the setting of the roof drainage system. Traditional solutions mostly rely on electric heating equipment to prevent icing, but this method has high energy consumption, high installation and maintenance costs, and there are certain safety hazards. Therefore, there is an urgent need for an efficient, energy-saving and easy-to-implement anti-freezing drainage technology to meet the drainage requirements under extreme climate conditions. Summary of the Invention
[0003] The purpose of the present invention is to provide a method and device for preventing downspouts from freezing, which solves the problem that water flowing down along the inner wall of a common downspout in a low-temperature environment in winter is easy to freeze, and can make the water drain out of the pipe in a free-fall state without touching the inner wall of the pipe.
[0004] In order to achieve the above purpose, the technical solution of the present invention is as follows:
[0005] A method for preventing downspouts from freezing, which is used for the drainage system of a multi-span greenhouse roof or a building roof. During the falling process of water, a flow guide plate is arranged before the water enters the downspout, and the flow state of the water is changed through the flow guide, so that the water changes from flowing along the pipe wall to freely falling in the downspout.
[0006] A device for preventing downspouts from freezing, which is integrally connected by a flow guide plate, a water retaining pipe, a clamping groove and a lower insertion pipe. The specific structure is as follows: a clamping groove is arranged on the outside between the water retaining pipe and the lower insertion pipe which are coaxially arranged up and down and have opposite inner walls. A water retaining pipe opening is opened on the water retaining pipe, and a flow guide plate inclined downward in the lower insertion pipe is arranged at the water retaining pipe opening.
[0007] For the device for preventing downspouts from freezing, the lower insertion pipe of the device for preventing downspouts from freezing passes through the bottom opening of the gutter and is fixed at the bottom opening of the gutter through the clamping groove; the lower insertion pipe of the device for preventing downspouts from freezing is inserted and matched with the downspout, and the joints of the device for preventing downspouts from freezing, the gutter and the downspout are sealed with structural glue or waterproof glue to prevent water leakage from the joints.
[0008] For the device for preventing downspouts from freezing, the flow guide plate is of an annular flared structure or a sector structure intercepted from a part thereof. Its upper end is connected to the bottom surface of the water retaining pipe opening, so that the flow guide plate is connected to the pipe wall at different angles and lengths, and its lower end is located in the lower insertion pipe.
[0009] For the described device for preventing ice formation in downspouts, the length of the connection between the deflector and the opening of the water retaining pipe is the same as the length of the opening of the water retaining pipe, or the length of the connection between the deflector and the opening of the water retaining pipe is greater than the length of the opening of the water retaining pipe.
[0010] For the described device for preventing ice formation in downspouts, the included angle between the longitudinal section of the deflector and the vertical direction is 10 to 90°, and the distance between the bottom of the deflector and the inner wall of the lower insertion pipe is controlled between 0.5 mm and 50 mm.
[0011] For the described device for preventing ice formation in downspouts, the height range of the water retaining pipe is 1 mm to 100 mm.
[0012] For the described device for preventing ice formation in downspouts, the device is made of a deflector, a water retaining pipe, a card slot and a lower insertion pipe made of polyvinyl chloride, polyethylene, fiberglass or metal, and the surface is coated with black paint or metal powder paint.
[0013] For the described device for preventing ice formation in downspouts, a notch is provided at the position where the card slot corresponds to the opening of the water retaining pipe.
[0014] The design concept of the present invention is:
[0015] Analyze the heat transfer process of water during its falling process. Its heat dissipation is related to the outdoor air temperature and also related to the falling time of the water. The longer the time, the greater the heat dissipation and the easier it is to freeze. Water flows along the wall of the downspout during its descent in the downspout. Since the flow rate of water is relatively slow during the process of flowing along the wall, the time required to flow to the ground is relatively long. Coupled with the relatively low outdoor temperature, water dissipates heat outward during the flowing process, resulting in continuous temperature reduction until it freezes.
[0016] Conduct a diversion in the flowing direction of the snow water, changing the original wall flow to the free fall of water, thereby greatly reducing the falling time, reducing heat dissipation, and further reducing the contact time between water and the pipe wall, avoiding blockage due to ice formation during the falling process of water. By adding a device for preventing ice formation in downspouts at the top of the downspout, the snow water can be made not to flow along the pipe wall but to drip freely downward, and the water does not contact the pipe wall and is not easily frozen.
[0017] The advantages and beneficial effects of the present invention are:
[0018] 1. After the winter snowmelt flows down along the downspout to the ground, due to the frictional force of the snowmelt against the pipe wall during the falling process, the descent time is relatively long and heat is continuously dissipated. Therefore, it is easy to freeze and block. The present invention proposes a method and device for preventing the downspout from freezing. The device for preventing the downspout from freezing mainly consists of a diversion plate, a water blocking pipe, a clamping groove, and a lower insertion pipe. By changing the flow direction of the snowmelt, the snowmelt does not contact the pipe wall of the downspout. Moreover, the diversion plate, water blocking pipe, clamping groove, and lower insertion pipe can be made of materials such as polyvinyl chloride, polyethylene, fiberglass, and metal, and the surface can be coated with black paint or metal powder paint, etc., to absorb solar radiation and increase the surface temperature.
[0019] 2. The device for preventing the downspout from freezing in the present invention connects the gutter and the downspout together through the clamping groove and an adhesive (such as structural adhesive or waterproof adhesive, etc.). When the precipitation is large and the drainage pressure is high in summer, the rainwater can submerge the water blocking pipe and the diversion plate of the device for preventing the downspout from freezing on the roof and directly flow into the lower downspout to achieve rapid drainage. When the precipitation is small and the drainage pressure is low in winter, the snowmelt enters the device for preventing the downspout from freezing along the gutter, and falls in a free-fall form through the diversion plate, avoiding contact with the pipe wall of the downspout, reducing the retention time, and being able to effectively prevent the downspout from freezing and reduce the freezing risk. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is an installation effect diagram of the device for preventing the downspout from freezing.
[0021] Figure 2 It is a design diagram of the device for preventing the downspout from freezing.
[0022] Figure 3 It is a sectional view of the device for preventing the downspout from freezing.
[0023] In the figure, 1 is the gutter, 2 is the device for preventing the downspout from freezing, 3 is the downspout, 4 is the diversion plate, 5 is the water blocking pipe, 6 is the clamping groove, 7 is the lower insertion pipe, and 8 is the opening of the water blocking pipe. DETAILED DESCRIPTION OF THE INVENTION
[0024] Next, the present invention will be further described in detail with reference to the drawings and embodiments.
[0025] As Figure 1 shown, the present invention proposes a device 2 for preventing the downspout from freezing. The process of using this device for the antifreeze protection of the downspout on the roof or in the greenhouse in winter is as follows: First, pass the lower insertion pipe 7 of the device 2 for preventing the downspout from freezing through the bottom opening of the gutter 1 and fix it at the bottom opening of the gutter 1 through the clamping groove 6; then insert and fit the lower insertion pipe 7 of the device 2 for preventing the downspout from freezing with the downspout 3, and subsequently use structural adhesive or waterproof adhesive to seal the joints of the device 2 for preventing the downspout from freezing, the gutter 1, and the downspout 3 to prevent water leakage from the joints.
[0026] As Figures 2 - 3As shown in the figure, the device 2 for preventing the downspout from freezing is mainly composed of a diversion plate 4, a water retaining pipe 5, a clamping groove 6 and a lower inserting pipe 7 which are integrally connected. The specific structure is as follows: A clamping groove 6 is arranged on the outer side between the water retaining pipe 5 and the lower inserting pipe 7 which are coaxially arranged up and down and have opposite inner walls. A water retaining pipe opening 8 is opened on the water retaining pipe 5. At the water retaining pipe opening 8, there is a diversion plate 4 which inclines downward in the lower inserting pipe 7. A notch is opened at the position of the clamping groove 6 corresponding to the water retaining pipe opening 8.
[0027] Among them, the diversion plate 4 is of an annular flare structure or a sector structure intercepted from a part of it. Its upper end is connected to the bottom surface of the water retaining pipe opening 8, and its lower end is located in the lower inserting pipe 7. The included angle between the longitudinal section of the diversion plate 4 and the vertical direction is 30° to 60°.
[0028] The distance a between the bottom of the diversion plate 4 and the inner wall of the lower inserting pipe 7 is controlled between 0.5 mm and 50 mm. The height b of the water retaining pipe 5 ranges from 1 mm to 100 mm. The length of the connection between the diversion plate 4 and the water retaining pipe opening 8 is the same as the length of the water retaining pipe opening 8. The length of the connection between the diversion plate 4 and the water retaining pipe opening 8 can also be greater than the length of the water retaining pipe opening 8. According to the local precipitation, the length of the connection between the diversion plate 4 and the water retaining pipe opening 8 is set between 1 mm and 100 mm. In the case of less rainfall, rainwater flows into the downspout 3 in a free-fall manner through the diversion plate 4, avoiding contact with the inner wall of the downspout 3. When the rainfall is large, rainwater will overflow the diversion plate 4 and enter the downspout 3, thus effectively preventing the occurrence of rainwater accumulation problems.
[0029] In addition, the diversion plate 4, the water retaining pipe 5, the clamping groove 6 and the lower inserting pipe 7 can be made of materials such as polyvinyl chloride, polyethylene, fiberglass, metal, etc. The surface can be coated with black paint or metal powder paint, etc., to absorb solar radiation and increase the surface temperature.
[0030] Embodiment 1
[0031] As Figures 1 - 3 shown, the diversion plate 4 is made of polyvinyl chloride or polyethylene material, and the surface is coated with black acrylic paint or black polyurethane paint to effectively absorb solar radiation, thereby increasing the surface temperature and effectively preventing the problem of snowmelt not flowing at the entrance. The distance a between the diversion plate 4 and the inner wall of the lower inserting pipe 7 is set at 8 mm. The height of the water retaining pipe 5 is 10 mm. The length of the connection between the diversion plate 4 and the water retaining pipe opening 8 is 40 mm. When the snowmelt in winter melts, the snowmelt flows into the downspout 3 from the water retaining pipe opening 8 and flows into the downspout 3 in a free-fall manner through the diversion plate 4, avoiding contact with the inner wall of the downspout 3. When the rainfall is large in summer, rainwater will overflow the water retaining pipe 5 and enter the downspout 3, thus efficiently draining water.
[0032] Embodiment 2
[0033] As Figures 1 - 3As shown, the flow deflector 4 is made of polyvinyl chloride or polyethylene, and the surface is coated with black acrylic paint or black polyurethane paint to effectively absorb solar radiation, thereby increasing the surface temperature and effectively preventing the problem of stagnant snowmelt water at the entrance. The distance a between the flow deflector 4 and the inner wall of the lower insertion tube 7 is set at 8 mm. The circumference of the connection between the flow deflector 4 and the water retaining pipe opening 8 is the same as that of the inner wall of the lower insertion tube 7, presenting a contracted flared shape, and the height of the water retaining pipe 5 is 1 mm. When the snowmelt water melts in winter, the snowmelt water flows into the downpipe 3 from the water retaining pipe opening 8 and flows into the downpipe 3 in a free-fall manner through the flow deflector 4, avoiding contact with the inner wall of the downpipe 3; when the rainfall is large in summer, the rainwater will overflow the water retaining pipe 5 and enter the downpipe 3, thereby achieving efficient drainage.
Claims
1. A method for preventing ice formation in downspouts, characterized in that, This method is used for the drainage system of the roof of a multi-span greenhouse or a building roof. During the process of water falling, a deflector plate is set before the water enters the downpipe. By guiding the flow, the flow state of the water is changed, and the water is changed from flowing along the pipe wall to freely falling in the downpipe.
2. An anti-icing device for the downspout used in the method according to claim 1, characterized in that, This device is integrally connected by a deflector plate, a water retaining pipe, a clamping groove and a lower inserting pipe. The specific structure is as follows: A clamping groove is arranged on the outside between the water retaining pipe and the lower inserting pipe which are coaxially arranged up and down and have opposite inner walls. A water retaining pipe opening is formed on the water retaining pipe, and a deflector plate inclined downward in the lower inserting pipe is arranged at the water retaining pipe opening.
3. The device for preventing ice formation on a downspout according to claim 2, wherein, The lower inserting pipe of the device for preventing the downpipe from freezing passes through the bottom opening of the gutter and is fixed at the bottom opening of the gutter through the clamping groove; The lower inserting pipe of the device for preventing the downpipe from freezing is inserted and matched with the downpipe, and the joints of the device for preventing the downpipe from freezing, the gutter and the downpipe are sealed with structural adhesive or waterproof adhesive to prevent water leakage from the joints.
4. The device for preventing ice formation in a downspout according to claim 2, wherein, The deflector plate is in the structure of an annular flare or a sector structure intercepted from it. Its upper end is connected to the bottom surface of the water retaining pipe opening, so that the deflector plate is connected to the pipe wall at different angles and lengths, and its lower end is located in the lower inserting pipe.
5. The device for preventing ice formation in a downspout according to claim 4, characterized in that, The length of the connection between the deflector plate and the water retaining pipe opening is the same as the length of the water retaining pipe opening, or the length of the connection between the deflector plate and the water retaining pipe opening is greater than the length of the water retaining pipe opening.
6. The device for preventing the downspout from freezing according to claim 4, wherein The included angle between the longitudinal section of the deflector plate and the vertical direction is 10 to 90°, and the distance between the bottom of the deflector plate and the inner wall of the lower inserting pipe is controlled between 0.5 mm and 50 mm.
7. The device for preventing ice formation on a downspout according to claim 2, characterized in that, The height range of the water retaining pipe is 1 mm to 100 mm.
8. The device for preventing ice formation on a downspout according to claim 2, wherein This device uses a deflector plate, a water retaining pipe, a clamping groove and a lower inserting pipe made of polyvinyl chloride, polyethylene, fiberglass or metal, and the surface is coated with black paint or metal powder paint.
9. The device for preventing ice formation in a downspout according to claim 2, wherein, A notch is formed at the position of the clamping groove corresponding to the water retaining pipe opening.