Anti-aging pert underfloor heating pipe
By installing an arc-shaped buffer plate and a cross-linked polyethylene sleeve in the PERT underfloor heating pipe, combined with a polyurethane paint coating, the problem of rapid aging in the bent sections of the underfloor heating pipe is solved, extending its service life and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGCHUN LIANSU IND CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-06-05
AI Technical Summary
The aging rate of the bent sections of existing PERT underfloor heating pipes is faster than that of the straight sections, resulting in a shorter service life.
An arc-shaped buffer plate and a cross-linked polyethylene pipe sleeve are installed in the underfloor heating pipe, combined with a polyurethane paint coating. The buffer plate has through holes to reduce water flow impact, the cross-linked polyethylene material improves anti-aging properties, the arc-shaped protrusions assist water flow, and the polyurethane paint protects the internal metal.
It extends the service life of underfloor heating pipes, reduces the aging rate of bent sections, improves the stability and durability of the system, and reduces maintenance costs.
Smart Images

Figure CN224327278U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of underfloor heating pipe technology, specifically to an anti-aging PERT underfloor heating pipe. Background Technology
[0002] PERT underfloor heating pipes are a type of pipe commonly used in underfloor radiant heating systems. PERT underfloor heating pipes have excellent flexibility, making them easy to bend and lay, reducing the use of fittings, lowering installation costs and the risk of leakage. At the same time, they can adapt well to slight ground settlement and thermal expansion and contraction, and are not prone to cracking or other problems.
[0003] Patent CN222256768U discloses a PERT underfloor heating pipe with anti-thermal and oxygen aging properties. This device achieves high heat utilization through structures such as heat dissipation grooves, heat insulation tiles, and cavities. When heat enters the pipe, it is dissipated outward through the heat dissipation grooves. Heat insulation tiles are installed on the symmetrical side of the heat dissipation grooves, which reduce the outward dissipation of heat. This results in heat being dissipated through the heat dissipation grooves and retained through the heat insulation tiles, avoiding heat waste and achieving the effect of fixing heat and rapid heat dissipation. The underfloor heating pipe is fixed in position through structures such as ring grooves, retaining rings, and fixing seats. The fixing seat is fixed to the underground side, and the pipe is inserted into the retaining ring through the opening of the retaining ring. After fixing, pressing a finger into the circular groove will break the auxiliary part of the retaining ring end from the retaining ring. When the underfloor heating pipe is buried later, the auxiliary part of the retaining ring is prevented from protruding, thus achieving the effect of fixing the underfloor heating pipe.
[0004] In existing technologies such as those described in the aforementioned patents, underfloor heating pipes have straight sections and curved sections. Because the water flow from the straight section into the curved section generates a large water flow impact, the aging rate of the curved section is much higher than that of the straight section. Therefore, it is particularly important to find ways to slow down the aging rate of the curved section of the underfloor heating pipe. Utility Model Content
[0005] The purpose of this invention is to provide an anti-aging PERT underfloor heating pipe to address the shortcomings of existing underfloor heating pipes, where the curved sections age faster than the straight sections.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an anti-aging PERT underfloor heating pipe, comprising a pipe body, wherein the pipe body comprises a first straight pipe and a curved pipe connected in sequence, wherein a plurality of arc-shaped buffer plates are provided on the inner wall of the first straight pipe, and each buffer plate is staggered along the extension direction of the first straight pipe inside the first straight pipe, and each buffer plate is provided with a plurality of through holes, wherein a cross-linked polyethylene sleeve is fitted on the outer wall of the curved pipe; water flowing through the pipe body flows from the first straight pipe to the curved pipe.
[0007] Furthermore, the pipe body also includes a second straight pipe, which is connected to the other end of the curved pipe, and two opposing arc-shaped protrusions are fixedly connected inside the second straight pipe.
[0008] Furthermore, the inner wall of the tube is coated with polyurethane paint.
[0009] Furthermore, the thickness of the sleeve is 2-4 cm.
[0010] Furthermore, the first straight tube and each buffer plate are integrally formed.
[0011] Furthermore, the number of buffer plates is four.
[0012] Compared with the prior art, the present invention provides an anti-aging PERT underfloor heating pipe. In the process of water flowing through the first straight pipe, the water first passes through each buffer plate. Each buffer plate receives the impact of the water flow and reduces the flow velocity. The arc-shaped buffer plate and the multiple through holes on the buffer plate reduce the impact force of the water flow without affecting the flow of water from the first straight pipe to the curved pipe. The reduced buffer force of the water flowing into the curved pipe can effectively alleviate the problem of easy aging in the bending part of the underfloor heating pipe and extend the service life of the underfloor heating pipe. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0014] Figure 1 A schematic diagram of the pipeline structure provided for an embodiment of this utility model;
[0015] Figure 2 A schematic diagram of the internal structure of the pipe provided in an embodiment of this utility model;
[0016] Figure 3 A schematic diagram of the water flow direction structure provided in this embodiment of the utility model;
[0017] Figure 4 A schematic diagram of the buffer plate structure provided in an embodiment of this utility model.
[0018] Explanation of reference numerals in the attached figures:
[0019] 1. Pipe body; 2. First straight pipe; 3. Curved pipe; 31. Pipe sleeve; 4. Buffer plate; 41. Through hole; 5. Second straight pipe; 51. Protrusion. Detailed Implementation
[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0021] Please see Figure 1-4 This utility model provides an anti-aging PERT underfloor heating pipe, including a pipe body 1. The pipe body 1 includes a first straight pipe 2, a curved pipe 3, and a second straight pipe 5 connected in sequence. The inner wall of the first straight pipe 2 is provided with multiple arc-shaped buffer plates 4. Specifically, each buffer plate 4 and the first straight pipe 2 are integrally formed, so that the connection strength between each buffer plate 4 and the first straight pipe 2 is high. Each buffer plate 4 is staggered along the extension direction of the first straight pipe 2. Each buffer plate 4 is provided with multiple through holes 41. The outer wall of the curved pipe 3 is fitted with a pipe sleeve 31 made of cross-linked polyethylene material. The thickness of the pipe sleeve 31 is 2-4 cm. On the one hand, the thickness of the pipe sleeve 31 is too large and affects the heat dissipation of the underfloor heating pipe. On the other hand, it can also protect the curved pipe 3. The water flowing through the pipe body 1 flows from the first straight pipe 2 to the curved pipe 3. Two opposing arc-shaped protrusions 51 are fixedly connected inside the second straight pipe 5.
[0022] Since the curved pipe 3 is one of the more prone to aging in the underfloor heating pipes, its protection is particularly important. The impact of water flow is another factor affecting the aging of the curved pipe 3. Water flows from the first straight pipe 2 to the second straight pipe 5, passing through the curved pipe 3. During the flow of water through the first straight pipe 2, the buffer plates 4 inside the first straight pipe 2 reduce the force of the water flow after entering the curved pipe 3. Taking one of the buffer plates 4 as an example, there is an angle between the buffer plate 4 and the first straight pipe 2... Figure 2 This allows the buffer plate 4 to also have a flow guiding effect. At the same time, the buffer plate 4 has multiple micro-holes 41, which reduces the impact on the water flow direction while providing a buffering effect. After the water flows to the curved pipe 3, the impact force is significantly reduced, thus reducing the impact on the curved pipe 3 and improving the anti-aging performance of the curved pipe 3 in the pipe body 1 during use, allowing the underfloor heating pipe to be used for a longer period of time. After passing through the curved pipe 3, the water flows to the first straight pipe 2. The first straight pipe 2 has two arc-shaped protrusions 51 fixedly connected to its inner wall, which allows the water to flow quickly (applying the Venturi effect, which is existing technology and will not be elaborated on here). The curved pipe 3 is covered with a cross-linked polyethylene sleeve 31. Through physical and chemical methods, the linear molecular structure of polyethylene is transformed into a three-dimensional network structure, thereby improving the performance of polyethylene. This cross-linking process gives the cross-linked polyethylene sleeve 31 excellent anti-aging ability, and it is not easy to deform or crack after long-term use, ensuring the long-term stable operation of the underfloor heating system.
[0023] Compared with the prior art, the present invention provides an anti-aging PERT underfloor heating pipe. In the process of water flowing through the first straight pipe 2, the water first passes through each buffer plate 4. Each buffer plate 4 receives the impact of the water flow and reduces the flow velocity. The arc-shaped buffer plate 4 and the multiple through holes 41 on the buffer plate 4 reduce the impact force of the water flow without affecting the flow of water from the first straight pipe 2 to the curved pipe 3. The reduced buffering force of the water flowing into the curved pipe 3 can effectively alleviate the problem of easy aging in the curved part of the underfloor heating pipe and extend the service life of the underfloor heating pipe.
[0024] The inner wall of pipe body 1 is coated with polyurethane paint. Polyurethane paint has excellent corrosion resistance, which can effectively protect the metal materials inside the pipe and extend the service life of the pipe. This is especially important for underfloor heating systems, because underfloor heating pipes need to withstand high temperature and alternating hot and cold environments for a long time. By using polyurethane paint, the number of maintenance and repairs of the underfloor heating system can be reduced, and long-term operating costs can be lowered. Its excellent wear resistance and high temperature resistance ensure the stable operation of the pipe and reduce failures caused by pipe wear or corrosion. In addition, polyurethane paint materials are recyclable and the production process is low-pollution, which is in line with the development trend of green building.
[0025] There are four buffer plates 4 in total, such as Figure 2 Four buffer plates 4 are staggered in the first straight pipe 2. After the water flows through the first buffer plate 4, part of the water flow can be buffered, but the other part of the water flow will be buffered by the adjacent buffer plate 4 that is staggered. The four buffer plates 4 can be divided into two groups, which can guide and buffer the water flow twice, thus achieving a good effect of buffering the water flow impact.
[0026] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. An anti-aging PERT underfloor heating pipe, comprising a pipe body (1), wherein the pipe body (1) sequentially comprises a first straight pipe (2) and a curved pipe (3) connected in series; characterized in that, Multiple arc-shaped buffer plates (4) are provided on the inner wall of the first straight pipe (2). Each buffer plate (4) is arranged alternately in the first straight pipe (2) along the extension direction of the first straight pipe (2). Multiple through holes (41) are provided on each buffer plate (4). A cross-linked polyethylene sleeve (31) is fitted on the outer wall of the curved pipe (3). The water flowing through the flow pipe body (1) flows from the first straight pipe (2) to the curved pipe (3).
2. The anti-aging PERT underfloor heating pipe according to claim 1, characterized in that, The tube body (1) also includes a second straight tube (5), which is connected to the other end of the curved tube (3). Two opposing arc-shaped protrusions (51) are fixedly connected inside the second straight tube (5).
3. The anti-aging PERT underfloor heating pipe according to claim 1, characterized in that, The inner wall of the tube (1) is coated with polyurethane paint.
4. The anti-aging PERT underfloor heating pipe according to claim 1, characterized in that, The thickness of the sleeve (31) is 2-4 cm.
5. The anti-aging PERT underfloor heating pipe according to claim 1, characterized in that, The first straight tube (2) and each buffer plate (4) are integrally formed.
6. The anti-aging PERT underfloor heating pipe according to claim 1, characterized in that, There are four buffer plates (4).