Anti-freezing composite rainwater pipe and rainwater pipe anti-freezing system
The anti-freeze composite rainwater pipe composed of hard insulated pipe and electric heating wire is precisely controlled by combining temperature sensors and leakage detection ropes, which solves the problem of freezing of rainwater pipes, reduces installation difficulty and energy consumption, and achieves efficient anti-freeze effect.
Patent Information
- Application Number
- CN202422403655.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-30
AI Technical Summary
Existing rainwater pipes are prone to freezing and causing blockage and rupture in severely cold areas. The existing anti-freeze technology is difficult to install, costly and has serious energy consumption and waste.
Anti-freezing composite rainwater pipe composed of hard insulated pipes and electric heating wires is precisely controlled by combining temperature sensors and water leakage detection ropes. The heating is only started when there is low temperature and water is available to avoid unnecessary electricity consumption.
It reduces construction difficulty and cost, improves energy efficiency, and achieves efficient anti-freeze effect in severe cold areas.
Smart Images
Figure CN223164135U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rainwater pipe anti-freezing, in particular to an anti-freezing composite rainwater pipe and a rainwater pipe anti-freezing system. Background Art
[0002] Rainwater or snow water on the roof of a building is drained through a rainwater pipe installed on the roof or in the roof gutter. In severe cold or cold regions, in winter, the ice and snow on the roof melt to form snow water. Due to the low temperature, the snow water will freeze inside the pipe and block the rainwater pipe during the process of being discharged through the rainwater pipe, causing the rainwater pipe to lose its drainage function and resulting in the inability to smoothly discharge the snow water. There are often phenomena where the rainwater pipe bursts due to the freezing and swelling inside the rainwater pipe. The large-scale freezing and bursting of rainwater pipes cause significant economic losses.
[0003] The existing rainwater buckets installed on the roof of the roof drainage system are conventional 87-type rainwater buckets, and the rainwater pipes use relatively inexpensive PVC pipes. The existing rainwater pipe anti-freezing technology generally adopts the method of winding and installing an electric heating tape on the outer wall of the already installed rainwater pipe, and then installing a heat-insulating material on the outer wall of the rainwater pipe installed with the electric heating tape, and the outer layer of the heat-insulating material is protected by galvanized iron sheet or other materials. The core of the existing technology is to use the heat generated by the electric heating tape after being powered on to heat the pipeline in cooperation with the heat-insulating layer, so that the pipeline wall and the air inside the pipeline reach a certain temperature, so that the snow water can be smoothly discharged without freezing in the pipeline.
[0004] Disadvantages of the existing technology:
[0005] 1. Since the rainwater pipe generally extends from the roof to the ground, the already installed rainwater pipe is relatively high. The installation of equipment such as electric heating tapes, heat-insulating materials, and galvanized iron sheets is difficult, the project cost is high, and the construction period is long.
[0006] 2. The existing electric heating tape rainwater pipe anti-freezing system uses a temperature controller for automatic control. When the ambient temperature is less than 0°C, the electric heating tape starts to heat and work, and when the ambient temperature is higher than 0°C, the electric heating tape stops working. This control method makes the electric heating tape anti-freezing system of the rainwater pipe in severe cold regions work throughout the winter (the whole winter temperature in cold regions is below zero), which is not conducive to the conservation of electric energy and causes a large waste, resulting in extremely high operating costs.
[0007] 3. All existing roof drainage systems are of the structural type with ordinary PVC pipes and 87-type rainwater inlets. The lumen of the rainwater pipe and the rainwater inlet connected to the rainwater pipe form an open space with the external environment. The air heated by the electric heating tape in the lumen of the rainwater pipe moves upward along the pipe wall of the rainwater pipe and is discharged into the environment through the 87-type rainwater inlet, while the cold air in the environment enters the pipe from the bottom of the rainwater pipe. Therefore, a large amount of heat loss is brought, affecting the anti-freezing effect of the rainwater pipe. A large amount of heat loss means that a large amount of electric energy is wasted senselessly, and this drawback is also the main reason for the waste of electric energy resulting in too high operating costs. Summary of the Invention
[0008] For this reason, the present invention provides an anti-freezing composite rainwater pipe and a rainwater pipe anti-freezing system to solve or alleviate one or more of the above problems.
[0009] To achieve the above object, the present invention provides the following technical solutions:
[0010] In a first aspect of the present invention, an anti-freezing composite rainwater pipe is provided, which includes a rigid insulating pipe, an electric heating wire, and a soft insulating pipe. A spiral groove is provided on the outer wall of the rigid insulating pipe, the electric heating wire is wound around the rigid insulating pipe along the groove, the soft insulating pipe is coated on the outside of the rigid insulating pipe, and a protrusion is formed at the position of the soft insulating pipe corresponding to the groove. The protrusion fills the remaining space of the groove, and the distance between the electric heating wire and the inner wall of the rigid insulating pipe is less than the distance between the electric heating wire and the outer wall of the soft insulating pipe.
[0011] Further, both ends of the electric heating wire extend out of the soft insulating pipe at positions close to both ends of the rigid insulating pipe respectively.
[0012] Further, the anti-freezing composite rainwater pipe further includes two connecting wires, two waterproof sealed junction boxes, a male waterproof connector, and a female waterproof connector. One ends of the two connecting wires are respectively connected to both ends of the extended electric heating wire, the waterproof sealed junction box is adhesively fixed outside the soft insulating pipe and seals the connection between the electric heating wire and the connecting wire, the other end of one connecting wire is connected to the male waterproof connector, and the other end of the other connecting wire is connected to the female waterproof connector.
[0013] In a second aspect of the present utility model, a rainwater pipe anti-freezing system is provided, which includes a drainage pipe string, a leakage detection rope, a temperature sensor, and a controller. The drainage pipe string includes at least one anti-freezing composite rainwater pipe provided in the first aspect of the present utility model. The leakage detection rope is annularly arranged on the inner wall of the top opening of the drainage pipe string. The temperature sensor is used to detect the temperature inside the drainage pipe string. The controller is electrically connected to the temperature sensor, the leakage detection rope, and the heating wire. When the actual temperature detected by the temperature sensor is lower than the set start temperature, the controller controls the leakage detection rope to start. When water is detected by the leakage detection rope, the controller turns on the power supply of the heating wire. When the actual temperature detected by the temperature sensor is higher than the set stop temperature or no water is detected by the leakage detection rope, the controller cuts off the power supply of the heating wire.
[0014] Further, the drainage pipe string further includes a rainwater hopper. The rainwater hopper includes a neck pipe, a diversion cap, and a dirt retaining grille. The diversion cap is arranged at the top of the neck pipe. The dirt retaining grille is arranged on the periphery of the diversion cap. The lower end of the neck pipe is connected to the anti-freezing composite rainwater pipe at the top. The leakage detection rope is arranged inside the neck pipe, and the temperature sensor is arranged inside the diversion cap.
[0015] The present utility model has the following advantages:
[0016] For the drainage pipe string formed by connecting the anti-freezing composite rainwater pipes provided by the present utility model, there is no need to additionally install electric tracing tapes, thermal insulation materials, galvanized iron sheets, etc. For new construction or renovation projects, the construction period can be shortened, the project cost can be reduced, and the installation difficulty can be reduced.
[0017] For the rainwater pipe anti-freezing system provided by the present utility model, double detection is carried out through the temperature sensor and the leakage detection rope. Only when the temperature is lower than the set start temperature and water is detected will the heating function of the heating wire be started, achieving precise control. When used in severely cold regions, the energy consumption and operation cost can be effectively reduced.
[0018] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extension based on the provided drawings without creative efforts.
[0020] The structures, proportions, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present utility model. Therefore, they do not have any substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.
[0021] Figure 1 Schematic structural diagram of an anti-freezing composite rainwater pipe provided for Example 1;
[0022] Figure 2 Partial cross-sectional structural diagram of an anti-freezing composite rainwater pipe provided for Example 1;
[0023] Figure 3 Exploded view of the partial cross-sectional structure of an anti-freezing composite rainwater pipe provided for Example 1;
[0024] Figure 4 Schematic structural diagram of a rainwater pipe anti-freezing system provided for Example 2;
[0025] Figure 5 Schematic structural diagram of a rainwater bucket of a rainwater pipe anti-freezing system provided for Example 2.
[0026] In the figure: 1 - anti-freezing composite rainwater pipe, 11 - rigid insulating pipe, 111 - grooved, 12 - heating wire, 13 - soft insulating pipe, 131 - protrusion, 14 - connecting wire, 15 - waterproof sealed junction box, 16 - male waterproof connector, 17 - female waterproof connector, 18 - conventional PVC pipe fitting, 2 - leakage detection rope, 3 - temperature sensor, 4 - controller, 5 - rainwater bucket, 51 - neck pipe, 52 - diversion cap, 53 - dirt blocking grille. Detailed implementation manners
[0027] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.
[0028] Example 1
[0029] As Figures 1-4As shown in the figure, this embodiment provides an anti-freezing composite rainwater pipe 1, which includes a rigid insulating pipe 11, a heating wire 12, and a soft insulating pipe 13. A spiral groove 111 is provided on the outer wall of the rigid insulating pipe 11. The heating wire 12 is wound around the rigid insulating pipe 11 along the groove 111. The soft insulating pipe 13 is covered outside the rigid insulating pipe 11, and a protrusion 131 is formed at the position of the soft insulating pipe 13 corresponding to the groove 111. The protrusion 131 fills the remaining space of the groove 111. The distance between the heating wire 12 and the inner wall of the rigid insulating pipe 11 is less than the distance between the heating wire 12 and the outer wall of the soft insulating pipe 13. Exemplarily, the rigid insulating pipe 11 is made of a rigid PVC pipe with an outer diameter of 106 mm and a wall thickness of 2.4 mm; the depth of the groove 111 is 1 mm and the width is 0.5 mm; the heating wire 12 is made of a stainless steel heating wire or a heating wire 12 of other materials with a diameter not greater than 0.3 mm; the soft insulating pipe 13 is made of PVC soft material with a thickness of 2 mm; thus, the distance between the heating wire 12 and the inner wall of the rigid insulating pipe 11 is 1.4 mm, and the distance between the heating wire 12 and the outer wall of the soft insulating pipe 13 is 2.2 mm; the soft insulating pipe 13 is covered outside the rigid insulating pipe 11 by an extrusion process. Therefore, during the extrusion molding, the material will fill the remaining space of the groove 111 (referring to the total space of the groove 111 - the space occupied by the heating wire 12).
[0030] Use a milling cutter to process the groove 111 along the spiral direction on the outer wall of the rigid insulating pipe 11, and a continuous groove that can cover the pipe circumference and extend along the length direction of the pipe can be formed, which is convenient for installing the heating wire 12. Installing the heating wire 12 in the groove 111 can effectively avoid the displacement of the heating wire 12 caused by the extrusion of the melted PVC soft material when passing through the extruder during the covering process. If the displacement distance of the heating wire 12 is too large, it may be directly torn off to form a circuit break, or it may be connected to the adjacent metal heating wire to form a short circuit. Installing the heating wire 12 in the groove 111 can be closer to the inner wall of the rigid insulating pipe 11, so that more heat generated by the heating wire 12 is dissipated through the inner wall of the rigid insulating pipe 11, rather than through the outer wall of the soft insulating pipe 13, so that the soft insulating pipe 13 has a certain heat insulation effect.
[0031] For the drain pipe string formed by connecting the anti-freezing composite rainwater pipes 1 provided in this embodiment in series, for a new project, after installation, there is no need to install additional electric tracing tapes, thermal insulation materials, galvanized iron sheets, etc., which can shorten the construction period and reduce the project cost. For a renovation project, since it is difficult to install electric tracing tapes, thermal insulation materials, galvanized iron sheets, etc., removing the old pipes and installing the new drain pipe string can also shorten the construction period and reduce the installation difficulty.
[0032] The length of the anti-freezing composite rainwater pipe 1 is limited. For high-rise buildings, it is necessary to use the form of connecting multiple anti-freezing composite rainwater pipes 1 in series. The pipeline connection between the anti-freezing composite drain pipes is connected by conventional PVC pipe fittings 18.
[0033] In this embodiment, both ends of the heating wire 12 extend out of the soft insulating tube 13 at positions close to both ends of the rigid insulating tube 11. The extended heating wire 12 is convenient for connecting to a power source or connecting to the heating wires 12 of adjacent anti-freezing composite rainwater pipes 1.
[0034] In this embodiment, the anti-freezing composite rainwater pipe 1 further includes two connecting wires 14, two waterproof sealed junction boxes 15, a male waterproof connector 16 and a female waterproof connector 17. One ends of the two connecting wires 14 are respectively connected to both ends of the extended heating wire 12. The waterproof sealed junction box 15 is adhesively fixed outside the soft insulating tube 13 to seal the connection between the heating wire 12 and the connecting wire 14. The other end of one connecting wire 14 is connected to the male waterproof connector 16, and the other end of the other connecting wire 14 is connected to the female waterproof connector 17. This can effectively prevent water. Exemplarily, the waterproof sealed junction box 15 is a box made of PVC material. The side of the box facing the pipe body has an arc surface with the same curvature as the pipe body. After the connecting wire 14 is connected to the heating wire 12, the connection is inside the box. The arc surface of the box is smeared with glue and adhered to the pipe body, and the space inside the box is filled with waterproof potting glue to meet the sealing requirements; the circuit connection between adjacent anti-freezing composite rainwater pipes 1 is realized by the male waterproof connector 16 and a female waterproof connector 17.
[0035] Embodiment 2
[0036] As Figure 4 and 5 shown, this embodiment provides a rainwater pipe anti-freezing system, which includes a drain pipe string, a leakage detection rope 2, a temperature sensor 3 and a controller 4. The drain pipe string includes at least one anti-freezing composite rainwater pipe 1 provided in Embodiment 1. The leakage detection rope 2 is arranged in a ring shape on the inner wall of the top opening of the drain pipe string. The temperature sensor 3 is used to detect the temperature inside the drain pipe string. The controller 4 is electrically connected to the temperature sensor 3, the leakage detection rope 2, and the heating wire 12. When the actual temperature detected by the temperature sensor 3 is lower than the set start temperature, the controller 4 controls the leakage detection rope 2 to start. When the leakage detection rope 2 detects water, the controller 4 turns on the power supply of the heating wire 12. When the actual temperature detected by the temperature sensor 3 is higher than the set stop temperature or the leakage detection rope 2 detects no water, the controller 4 cuts off the power supply of the heating wire 12. Exemplarily, the temperature sensor 3 is a PT100 temperature sensor 3, the start temperature is 0 °C, and the stop temperature is 8 °C.
[0037] The operation process of the rainwater pipe anti-freezing system is as follows: The temperature sensor 3 detects the actual temperature. If the actual temperature is lower than 0°C, the leakage detection rope 2 is activated to detect whether there is water. If there is water, the power supply of the heating wire 12 is connected. If there is no water, the power supply of the heating wire 12 is not connected. After the power supply of the heating wire 12 is connected, the heating wire 12 is energized to heat, so that the temperature inside the pipe rises to avoid freezing. During this period, the temperature sensor 3 and the leakage detection rope 2 continue to work. When the temperature sensor 3 detects that the actual temperature is higher than 8°C or the leakage detection rope 2 detects no water, the heating wire 12 is powered off to stop heating in order to save electrical energy, and the leakage detection rope 2 also stops working, leaving only the temperature sensor 3 to continue working.
[0038] The rainwater pipe anti-freezing system provided by the present utility model performs double inspections (detecting temperature and detecting whether there is water) through the temperature sensor 3 and the leakage detection rope 2. Only when the temperature is lower than the set start temperature and water is detected will the heating function of the heating wire 12 be activated, achieving precise control. When used in cold regions, it can effectively reduce energy consumption and operating costs.
[0039] In this embodiment, the drain pipe string further includes a rainwater hopper 5. The rainwater hopper 5 includes a neck pipe 51, a flow guide cap 52, and a dirt screen 53. The flow guide cap 52 is arranged at the top of the neck pipe 51, the dirt screen 53 is arranged on the periphery of the flow guide cap 52. The lower end of the neck pipe 51 is connected to the anti-freezing composite rainwater pipe 1 at the top. The leakage detection rope 2 is arranged inside the neck pipe 51, and the temperature sensor 3 is arranged inside the flow guide cap 52. Exemplarily, the rainwater hopper 5 can adopt the existing type 87 rainwater hopper 5, or can also adopt the rainwater hopper 5 improved on the basis of the existing type 87 rainwater hopper 5.
[0040] In the description of this specification, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.
[0041] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.
[0042] In this application, unless otherwise clearly stipulated or limited, terms such as "install", "connect", "link", "fix", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the connection inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0043] In this application, unless otherwise clearly stipulated or limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0044] The above disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure of this application, components and settings of specific examples are described above. Of course, they are only examples and are not intended to limit this application. In addition, this application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between various embodiments and / or settings discussed.
[0045] As described above, it is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of various changes or substitutions, and these should all be covered within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.
Claims
1. An antifreeze composite rainwater pipe, characterized in that: The invention comprises a rigid insulating tube, a heating wire and a soft insulating tube. The outer wall of the rigid insulating tube is provided with a spiral groove. The heating wire is wound around the rigid insulating tube along the groove. The soft insulating tube is provided to cover the outer side of the rigid insulating tube. A protrusion is formed on the soft insulating tube at a position corresponding to the groove. The protrusion fills the remaining space in the groove. The distance between the heating wire and the inner wall of the rigid insulating tube is smaller than the distance between the heating wire and the outer wall of the soft insulating tube.
2. The antifreeze composite rainwater pipe according to claim 1, characterized in that: The two ends of the heating wire extend out of the soft insulating tube at positions close to the two ends of the hard insulating tube respectively.
3. The antifreeze composite rainwater pipe according to claim 2, characterized in that: The antifreeze composite rainwater pipe also includes two connecting wires, two waterproof sealed junction boxes, a male waterproof connector and a female waterproof connector. One end of the two connecting wires is respectively connected to the two ends of the extended heating wire. The waterproof sealed junction box is bonded and fixed to the outside of the soft insulating tube and seals the connection between the heating wire and the connecting wire. The other end of one connecting wire is connected to the male waterproof connector, and the other end of the other connecting wire is connected to the female waterproof connector.
4. A rainwater pipe antifreeze system, characterized in that: It includes a drainage pipe string, a leakage detection rope, a temperature sensor and a controller, the drainage pipe string includes at least one antifreeze composite rainwater pipe according to any one of claims 1 to 3, the leakage detection rope is arranged in a ring shape on the top inner wall of the drainage pipe string, the temperature sensor is used to detect the temperature inside the drainage pipe string, the controller is electrically connected to the temperature sensor, the leakage detection rope and the heating wire, when the actual temperature detected by the temperature sensor is lower than the set starting temperature, the controller controls the leakage detection rope to start, when the leakage detection rope detects water, the controller turns on the power of the heating wire, when the actual temperature detected by the temperature sensor is higher than the set stop temperature or the leakage detection rope detects no water, the controller cuts off the power of the heating wire.
5. The rainwater pipe antifreeze system according to claim 4, characterized in that: The drainage pipe string also includes a rain gutter, which includes a neck tube, a guide cap and a dirt retaining grille. The guide cap is arranged at the top of the neck tube, and the dirt retaining grille is arranged on the surrounding side of the guide cap. The lower end of the neck tube is connected to the antifreeze composite rain water pipe located at the top, the water leakage detection rope is arranged in the neck tube, and the temperature sensor is arranged in the guide cap.