PVC pipeline with good heat preservation performance
By designing a limiting cap and heating components in the PVC pipe, the problem of uneven insulation material caused by displacement of the inner and outer pipes is solved, ensuring the insulation effect and preventing water freezing, thus improving the insulation performance of the PVC pipe.
Patent Information
- Application Number
- CN202520207936.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-10
AI Technical Summary
During the manufacturing process of existing PVC insulation pipes, relative displacement between the inner and outer pipes is prone to occur, resulting in uneven insulation material thickness, which affects the insulation effect. Furthermore, the water inside the pipe is prone to freezing and clogging in low-temperature environments.
Design a PVC pipe structure including a protective pipe and a limiting cap. The inner pipe is inserted and fixed through the through hole of the limiting cap. The limiting cap is provided with a through groove for installing a heating component. The heating component heats the inner pipe to prevent water from freezing. The insulation material is evenly distributed between the inner and outer pipes.
This achieves uniform insulation material thickness, improves insulation effect, prevents water freezing in low-temperature environments, and enhances the insulation performance of pipelines.
Smart Images
Figure CN223794803U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of PVC pipe technology, and in particular to a PVC pipe with good thermal insulation. Background Technology
[0002] PVC pipes are made by hot-pressing polyvinyl chloride resin with stabilizers, lubricants, and other additives. They were among the first plastic pipes to be developed and applied. PVC pipes are characterized by strong corrosion resistance, ease of bonding, low price, and rigidity, and are widely used in drainage, wastewater, chemical, heating and cooling fluids, food, ultrapure liquids, slurries, gases, compressed air, and vacuum systems.
[0003] When transporting hot water, existing PVC insulated pipes have a three-layer structure to reduce heat loss from the hot water tank to the user's hot water pipe: an inner PVC pipe, a middle insulation material layer, and an outer PVC protective pipe layer. The insulation material layer is made by injecting rigid polyurethane foam liquid into the cavity between the inner PVC pipe and the PVC protective pipe in one go using a high-pressure foaming machine. The disadvantages of this method are: during the manufacturing process, relative displacement can easily occur between the inner and outer pipes, causing deformation or serious eccentricity of the insulation pipe, resulting in uneven insulation material thickness and affecting the insulation effect. Furthermore, when the water stops flowing in the pipe, the water temperature inside the pipe will gradually decrease, and if the ambient temperature is too low, the water inside the pipe may freeze and block the water pipe. Utility Model Content
[0004] In order to overcome the above-mentioned defects in the prior art, the present invention provides a PVC pipe with good thermal insulation.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a PVC pipe with good heat insulation, including a protective pipe, with limit caps installed at both ends of the protective pipe, a through hole opened at the axis of the limit cap, an inner pipe inserted into the through hole, through grooves opened on the side walls of the two sets of limit caps, a transmission pipe inserted into the through groove, and a heating component installed in the transmission pipe.
[0006] Furthermore, the inner walls at both ends of the protective tube are provided with threaded portions, the limiting cover is provided with connecting platforms that match the threaded portions, and the outer wall of the limiting cover is provided with anti-slip platforms arranged in a circumferential array.
[0007] Furthermore, the heating assembly includes a heating belt, a heating wire, and a heating tube, the through groove has an oblong hole structure, and the shape of the transmission tube matches the shape of the through groove.
[0008] Furthermore, an injection port is provided on the outer wall of the limiting cover, and a sealing ring is installed at one end of the through hole near the middle of the protective tube, the sealing ring abutting against the outer wall of the inner tube.
[0009] The beneficial effects of this utility model are that the design scheme of this utility model uses the design of installing limit caps at both ends of the protective tube. The inner tube passes through the through hole in the center of the limit cap and the limit cap limits the inner tube, making the inner tube coaxial with the protective tube. This makes the thickness of the insulation material uniform, which is conducive to improving the insulation effect. When the ambient temperature is low, the heating component heats the inner tube to prevent the water in the tube from freezing, and at the same time further improves the insulation effect of the pipe. Attached Figure Description
[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0012] Figure 2 This is the front view of the present invention;
[0013] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;
[0014] Figure 4 This is an exploded view of the present invention;
[0015] Figure 5 for Figure 3 A magnified view of a portion of region B in the middle.
[0016] In the diagram: 1. Protective tube, 11. Threaded part, 2. Limiting cap, 21. Through hole, 22. Through groove, 23. Connecting platform, 24. Anti-slip platform, 25. Injection port, 3. Inner tube, 4. Supply tube, 5. Sealing ring. Detailed Implementation
[0017] To more clearly illustrate the technical solution of this utility model, the following description is made in conjunction with the accompanying drawings. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings and embodiments without creative effort, and all of them fall within the protection scope of this utility model.
[0018] according to Figure 1-5As shown, a PVC pipe with good insulation includes a protective pipe 1. Limiting caps 2 are installed at both ends of the protective pipe 1. A through hole 21 is opened at the center of the limiting cap 2. An inner pipe 3 is inserted into the through hole 21. Through grooves 22 are opened on the side walls of the two sets of limiting caps 2. A transmission pipe 4 is inserted into the through groove 22. A heating component is installed in the transmission pipe 4.
[0019] In this embodiment, the inner walls of both ends of the protective tube 1 are provided with threaded portions 11, and the limiting cover 2 is provided with connecting platforms 23 that match the threaded portions 11. The outer wall of the limiting cover 2 is provided with anti-slip platforms 24 arranged in a circumferential array. During manufacturing, the limiting cover 2 is screwed to both ends of the protective tube 1, and the inner tube 3 passes through the through hole 21 of the limiting cover 2.
[0020] In this embodiment, the heating assembly includes a heating belt, a heating wire, and a heating tube. Preferably, the heating assembly uses a heating belt. The through groove 22 has a waist-shaped hole structure. The shape of the transmission pipe 4 matches the shape of the through groove 22. By designing the waist-shaped structure of the transmission pipe 4, the heating area of the heating assembly is increased, thereby improving the heating efficiency of the inner tube 3.
[0021] In this embodiment, an injection port 25 is provided on the outer side wall of the limiting cover 2. A sealing ring 5 is installed at one end of the through hole 21 near the middle of the protective tube 1. The sealing ring 5 abuts against the outer side wall of the inner tube 3. The insulation material is injected into the cavity between the protective tube 1 and the inner tube 3 through the injection port 25, and the gap between the limiting cover 2 and the inner tube 3 is sealed by the sealing ring 5. After the insulation material solidifies, an insulation layer is formed.
[0022] In the manufacturing process of this utility model, the limiting cap 2 is screwed to both ends of the protective tube 1, and the inner tube 3 passes through the through hole 21. The limiting cap 2 limits the inner tube 3, making the inner tube 3 coaxial with the protective tube 1, thereby making the thickness of the insulation material uniform and improving the insulation effect. After the inner tube 3 is fixed, the delivery pipe 4 passes through the through groove 22, and then the insulation material is injected into the cavity between the protective tube 1 and the inner tube 3 through the injection port 25. After the insulation material solidifies, it forms an insulation layer. At the same time, the delivery pipe 4 is fixed. When laying the pipeline, heating components such as heating belts can be easily installed through the delivery pipe 4. When the ambient temperature is low, the heating components heat the inner tube 3 to prevent the water in the pipe from freezing, and further improve the insulation effect of the pipeline.
[0023] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this utility model.
Claims
1. A well-insulated PVC pipe comprising a protective tube (1), characterized in that: Two ends of the protective pipe (1) are matched with limit caps (2), an axial hole (21) is arranged on the limit cap (2), an inner pipe (3) is inserted into the axial hole (21), two groups of side walls of the limit cap (2) are provided with through grooves (22), wire pipes (4) are inserted into the through grooves (22), and heating assemblies are matched and installed in the wire pipes (4).
2. A PVC pipe having good heat retention according to claim 1, characterized in that, Threaded parts (11) are arranged on inner walls of two ends of the protective pipe (1), the limit cap (2) is provided with a connecting table (23) matched with the threaded parts (11), and anti-skid tables (24) are circumferentially arranged on outer side walls of the limit cap (2).
3. A PVC pipe having good heat retention according to claim 1, characterized in that, The heating assembly comprises a heating belt, a heating wire and a heating pipe, the through groove (22) is a waist-shaped hole structure, and the shape of the wire pipe (4) is matched with the shape of the through groove (22).
4. A PVC pipe having good heat retention according to claim 1, wherein An injection port (25) is arranged on the outer side wall of the limit cap (2), a sealing ring (5) is matched and installed on one end of the axial hole (21) close to the middle part of the protective pipe (1), and the sealing ring (5) abuts against the outer side wall of the inner pipe (3).