High-efficiency heat-insulating composite thermal insulation pipe
Patent Information
- Application Number
- CN202521805586.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-25
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-08-25
AI Technical Summary
该方案虽简化了安装流程，但存在显著缺陷：热桥效应突出：金属法兰直接贯穿保温层，形成高导热通道，导致热量沿金属部件快速外泄（导热系数高达16-50 W/(m·K)）；界面热损失：法兰与保温管体间的非连续性界面易产生缝隙，诱发对流散热；二次保温可靠性差：后加装的保温外壳与管道主体保温层存在物理间隙，长期使用后易因震动或老化产生位移，降低隔热效果
1.通过将保温管的连接处的一端设置为第一连接头的结构，可以使得内部的液体流经连接处的时候，不会将热量过多的向外传递，海绵块具有很好的隔热能力，实现了对连接处的隔热的效果。
Smart Images
Figure CN224649290U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline technology, and in particular to a high-efficiency heat-insulating composite insulation pipe. Background Technology
[0002] With the acceleration of urbanization and the transformation of energy structure, the requirements for the thermal insulation performance of pipelines in heating, cooling, and industrial fluid transportation systems are increasing. Traditional insulated pipelines commonly suffer from severe heat loss at connection points when transporting high-temperature steam, low-temperature liquefied media (such as LNG), or constant-temperature fluids over long distances. According to industry research statistics, heat loss at connection points in pipeline systems can account for 15%-30% of the total heat loss, becoming a key bottleneck restricting energy efficiency improvements.
[0003] Currently, most mainstream composite insulated pipes adopt a structure where a polyurethane foam layer wraps around the working pipe (such as the prefabricated direct-buried insulated pipe according to GB / T 29047-2012 standard). These pipes have good thermal insulation performance in the main pipe section, but due to structural strength and sealing requirements, the joints typically use metal flanges or mechanical compression fittings. For example, existing quick-installation insulated pipe connection structures connect the two pipes through stainless steel flanges, with a removable insulation shell covering the flange. While this simplifies the installation process, it has significant drawbacks: prominent thermal bridging effect: the metal flange directly penetrates the insulation layer, forming a high thermal conductivity channel, causing heat to leak rapidly along the metal components (thermal conductivity as high as 16-50 W / (m·K)); interface heat loss: the discontinuous interface between the flange and the insulated pipe body easily creates gaps, inducing convective heat dissipation; poor reliability of secondary insulation: the added insulation shell has a physical gap with the main pipe insulation layer, and after long-term use, it is prone to displacement due to vibration or aging, reducing the insulation effect.
[0004] Another common approach is the vacuum-insulated pipe joint, which incorporates a vacuum interlayer at the joint to block heat conduction. While this technology performs excellently under laboratory conditions, it faces challenges in engineering applications: the vacuum chamber structure is complex and costly to manufacture; the vacuum level is difficult to maintain long-term, and even minor leaks can cause a precipitous drop in insulation performance; it also has weak resistance to mechanical impact, making it unsuitable for underground installations or high-vibration conditions. Furthermore, while current industry standards (such as CJ / T 114-2000) specify clear requirements for the thermal resistance of the insulated pipe body, they lack mandatory quantitative indicators for the insulation performance of the connection points. This has led to the widespread adoption of a compromise solution of "metal joints + auxiliary insulation materials" in engineering practice. The drawbacks of this solution are mainly reflected in the following aspects: poor compatibility of insulation materials: traditional fillers such as glass wool and rock wool are difficult to fill evenly and densely in the narrow joint space, and are prone to settling and forming cavities after long-term use; contradiction between sealing and heat insulation: high pre-tightening force is required to ensure airtightness of the connection, but the pressure will compress the flexible insulation layer (such as rubber sponge), reducing its effective heat conduction and barrier capacity; mismatch of life cycle: metal joints are designed to have a life of up to 30 years, while auxiliary insulation materials usually powder and fail after 5-8 years, requiring frequent maintenance.
[0005] To address the aforementioned issues, there is an urgent need to develop a composite insulation pipe connection technology that features an integrated structure, no thermal bridges, and a long lifespan, thereby fundamentally solving the problem of heat loss at the connection points. Utility Model Content
[0006] The purpose of this invention is to provide a high-efficiency thermal insulation composite insulation pipe to solve the problems existing in the prior art.
[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A high-efficiency thermal insulation composite insulation pipe includes an insulation pipe, one end of which is provided with an integrally formed first connector, and the other end of which is provided with an integrally formed second connector. The first connector includes an outer shell and an inner shell, both of which are cylindrical structures and are coaxially arranged. There is a gap between the outer shell and the inner shell, and the gap between the outer shell and the inner shell is filled with a sponge block. One end of the outer shell and the inner shell is connected to the insulation pipe, and the inner diameter of the inner shell is the same as the inner diameter of the insulation pipe. The outer diameter of the outer shell is the same as the outer diameter of the insulation pipe. The other end of the outer shell is provided with a thread, and a ring is screwed to the threaded end of the outer shell. The ring has a concentric extension edge and is used to seal the end of the outer shell and the inner shell that is not connected to the insulation pipe. The inner diameter of the ring is smaller than the inner diameter of the inner shell.
[0008] By adopting the above technical solution, and setting one end of the connection of the insulation pipe as the first connector, the internal liquid will not transfer too much heat to the outside when it flows through the connection. The sponge block has good heat insulation ability, thus achieving heat insulation of the connection.
[0009] In a further embodiment, the second connector has the same structure as the first connector.
[0010] By adopting the above technical solution, a sleeve can be added during use. The two ends of the sleeve are completely open. The inner diameter of the sleeve is smaller than the outer diameter of the outer shell. The inner diameter of the sleeve also needs to meet the condition that it is larger than the inner diameter of the outer shell. Then, a heat fusion tool is used to heat and melt the inner wall of the sleeve and the outer wall of the outer shell. Then, the two ends of the sleeve are respectively fitted onto the outer shell. This method will significantly increase the area of the insulated pipe at the connection point, so heat insulation treatment is required at the connection point.
[0011] In a further embodiment, the outer side of the insulation pipe is wrapped with a heat insulation layer.
[0012] By adopting the above technical solutions, the thermal insulation performance of the insulation pipe can be further improved.
[0013] In a further embodiment, the outer diameter of the ring is transitionally fitted with the inner diameter of the outer shell, and the inner diameter of the ring is transitionally fitted with the outer diameter of the inner shell. An annular groove is provided in the middle section of the ring, and a sealing ring is fitted inside the annular groove.
[0014] By adopting the above technical solution, compared with the screw ring method, this setting allows the end faces of the insulation pipes at the points where they are connected to fit together completely during connection.
[0015] In a further embodiment, the space between the outer shell and the inner shell is filled with expanding foam.
[0016] By adopting the above technical solution, the outer shell and the inner shell can withstand greater impact forces.
[0017] In summary, this utility model has the following beneficial effects: 1. By setting one end of the connection of the insulation pipe as the first connector, the internal liquid will not transfer too much heat to the outside when it flows through the connection. The sponge block has good heat insulation ability, thus achieving the effect of heat insulation at the connection. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2This is a schematic diagram illustrating the internal structure of the first connector of this utility model.
[0019] In the diagram, 1 is the insulation pipe; 2 is the first connector; 21 is the outer shell; 22 is the inner shell; 3 is the second connector; and 4 is the ring. Detailed Implementation
[0020] The present invention will be further described in detail below with reference to the accompanying drawings.
[0021] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.
[0022] Example 1: like Figures 1-2 As shown, a high-efficiency heat-insulating composite insulation pipe includes an insulation pipe 1, with an integrally formed first connector 2 at one end and an integrally formed second connector 3 at the other end. The first connector 2 includes an outer shell 21 and an inner shell 22, both of which are cylindrical structures. The outer shell 21 and the inner shell 22 are coaxially arranged with a gap between them. The gap between the outer shell 21 and the inner shell 22 is filled with a sponge block. One end of the outer shell 21 and the inner shell 22 is connected to the insulation pipe 1, and the inner diameter of the inner shell 22 is the same as the inner diameter of the insulation pipe 1, while the outer diameter of the outer shell 21 is the same as the outer diameter of the insulation pipe 1. The outer diameters are consistent, and the other end of the outer shell 21 is threaded. A ring 4 is screwed to the threaded end of the outer shell 21. The ring 4 has a concentric extension edge. The ring 4 is used to seal the end of the outer shell 21 and the inner shell 22 that is not connected to the insulation pipe 1, and the inner diameter of the ring 4 is smaller than the inner diameter of the inner shell 22. The structure of the second connector 3 is consistent with that of the first connector 2. The outer side of the insulation pipe 1 is wrapped with a heat insulation layer. The outer diameter of the ring 4 is in transition fit with the inner diameter of the outer shell 21, and the inner diameter of the ring 4 is in transition fit with the outer diameter of the inner shell 22. An annular groove is provided in the middle section of the ring 4, and a sealing ring is fitted inside the annular groove. Foam is filled between the outer shell 21 and the inner shell 22.
[0023] Specific implementation process: One end of the insulated pipe is designed as the first connector, preventing excessive heat transfer when the internal liquid flows through the connection. The sponge block provides excellent insulation, thus insulating the connection. A sleeve can be added during use; both ends of the sleeve are fully open, with the inner diameter of the sleeve smaller than the outer diameter of the outer shell, while simultaneously being larger. A heat-melting tool is then used to heat-melt the inner wall of the sleeve and the outer wall of the outer shell. The two ends of the sleeve are then fitted onto the outer shell. This method significantly increases the area of the insulated pipe at the connection point, necessitating heat insulation treatment at the connection.
[0024] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.
[0025] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
Claims
1. A high-efficiency thermal insulation composite insulation pipe, characterized in that: The system includes an insulation pipe (1), one end of which is provided with an integrally formed first connector (2), and the other end of which is provided with an integrally formed second connector (3); the first connector (2) includes an outer shell (21) and an inner shell (22), both of which are cylindrical structures, are coaxially arranged, and have a gap between them. A sponge block is filled in the gap between the outer shell (21) and the inner shell (22). 21) One end of the inner shell (22) is connected to the insulation pipe (1), and the inner diameter of the inner shell (22) is the same as the inner diameter of the insulation pipe (1). The outer diameter of the outer shell (21) is the same as the outer diameter of the insulation pipe (1). The other end of the outer shell (21) is provided with a thread. The threaded end of the outer shell (21) is screwed with a ring (4). The ring (4) is provided with a concentric extension edge. The ring (4) is used to seal the end of the outer shell (21) and the inner shell (22) that is not connected to the insulation pipe (1). The inner diameter of the ring (4) is smaller than the inner diameter of the inner shell (22).
2. The high-efficiency thermal insulation composite insulation pipe according to claim 1, characterized in that: The second connector (3) has the same structure as the first connector (2).
3. The high-efficiency thermal insulation composite insulation pipe according to claim 1, characterized in that: The outer side of the insulation pipe (1) is wrapped with a heat insulation layer.
4. The high-efficiency thermal insulation composite insulation pipe according to claim 1, characterized in that: The outer diameter of the ring (4) is fitted with the inner diameter of the outer shell (21), and the inner diameter of the ring (4) is fitted with the outer diameter of the inner shell (22). The middle section of the ring (4) is provided with an annular groove, and a sealing ring is fitted inside the annular groove.
5. The high-efficiency thermal insulation composite insulation pipe according to claim 1, characterized in that: The space between the outer shell (21) and the inner shell (22) is filled with expanding foam.