Waterproof electrically heated fusion splice

Abstract

The utility model provides waterproof electric heat melting heat preservation joint relates to heat preservation joint technical field, including the buckle cover main part, the buckle cover main part includes first buckle cover and second buckle cover, the inner surface wall end of second buckle cover and first buckle cover all is fixedly connected with the plug -in block, the plug -in block is used for with the pipe body preset installation groove adaptive connection, with first buckle cover and second buckle cover are positioned on the pipe body joint, be equipped with the filling cavity for accommodating heat preservation filling material between two the plug -in block and be located the internal space that second buckle cover and first buckle cover surround form. Compared with prior art, the utility model sets up heat preservation and heat insulation structure in the filling cavity, uses, with the heat preservation filling material of subsequent filling commonly constitutes vacuum heat insulation and the double heat preservation structure of filling material, can rely on vacuum environment to block the path of heat transfer through conduction and convection greatly, can pass through heat preservation filling material and fill up tiny gap, strengthen heat insulation effect, improve overall heat preservation efficiency significantly.

Description

Technical Field

[0001] This utility model relates to the field of thermal insulation joint technology, and in particular to a waterproof electrofusion thermal insulation joint. Background Technology

[0002] In pipeline transportation systems, especially in scenarios where the temperature of the medium needs to be maintained, such as hot water and heating, the insulation and waterproofing performance of the joints directly determines the overall operating efficiency and service life of the system. Traditional pipe joints often use on-site fabrication of insulation layers, which achieves insulation by wrapping insulation cotton and applying insulation coatings. However, this method is greatly affected by the temperature and humidity of the construction environment and the technical level of the operators, and is prone to problems such as uneven insulation layer thickness and poor sealing, making the joints the main nodes of heat loss. Therefore, electrofusion insulation joints are required.

[0003] Application No. 202122662887.9 discloses a waterproof electrofusion insulation joint. This joint wraps the pipe connection with a pre-set insulation component and uses a seamless heat-shrink sleeve for heating and shrinking to achieve a waterproof seal, significantly simplifying the on-site construction process and reducing the impact of construction conditions on the joint quality. However, in practical applications, existing electrofusion insulation joints have a simple insulation structure design, generally relying solely on insulation filler to achieve insulation. The filler inevitably contains tiny gaps, through which heat is easily conducted and lost. Especially in high-temperature hot water pipelines, this can easily lead to increased heat loss of the medium within the pipeline, directly increasing the energy consumption cost of the heating system. Furthermore, it has limitations in resistance to external... With relatively weak resistance to environmental disturbances, when the underground soil temperature rises in summer, external heat can easily enter the internal filling cavity through the joint's buckle structure, further weakening the insulation effect and failing to effectively maintain the stable temperature of the medium inside the pipeline, affecting the transportation efficiency. Finally, groundwater is prone to adhere to the joint surface and remain there for a long time, accelerating the aging and damage of the heat shrink sleeve. At the same time, condensate generated by temperature changes during pipeline operation cannot be discharged in time and will accumulate in the filling cavity, gradually destroying the structural integrity of the insulation filler, leading to clumping and carbonization of the filler. This not only further reduces the insulation performance but may also cause corrosion of the metal components inside the filling cavity, shortening the overall service life of the joint and making it difficult to guarantee the joint's waterproofness and structural stability in the long term. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model proposes a waterproof electrofusion insulation joint.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A waterproof electrofusion insulation joint includes a cover body, which comprises a first cover and a second cover. Insert blocks are fixedly connected to the inner surface ends of both the second cover and the first cover. These insert blocks are used to adapt and connect to a pre-set mounting groove on the pipe body to achieve positioning of the first and second covers on the pipe body joint. A filling cavity for accommodating insulation material is provided between the two insert blocks and within the internal space enclosed by the second and first covers. The filling cavity has an internal insulation structure to form a dual insulation system in conjunction with the insulation material. Anti-condensation components are provided on both the second and first covers to promptly drain condensate generated in the filling cavity due to temperature changes.

[0007] Preferably, the thermal insulation structure includes an inner protective membrane disposed inside the filling cavity, an insulating core material disposed on the outer side of the inner protective membrane, and a vacuum barrier membrane wrapped around the outer side of the insulating core material.

[0008] Preferably, the thermal insulation structure further includes a support column connected to the outer wall of the thermal insulation core material. The end of the support column away from the thermal insulation core material passes through the vacuum barrier membrane and is connected to the inner wall of the cover body. The outer wall of the cover body is provided with a reflective thermal insulation coating.

[0009] Preferably, both ends of the cover body are provided with connecting blocks for splicing connection, and the outside of the connecting blocks is covered with a seamless heat shrink sleeve.

[0010] Preferably, the anti-condensation component includes a groove formed on the inner surface wall of the cover body, a tube groove formed on one side of the groove and on the inner wall of the cover body, a collection tube inserted inside the tube groove, and the outlet end of the collection tube passing through the cover body and the seamless heat shrink sleeve in sequence and extending to the outside of the seamless heat shrink sleeve.

[0011] Preferably, the outer wall of the seamless heat shrink sleeve is provided with a hydrophobic coating.

[0012] Preferably, the outer wall of the cover body is provided with a filling hole, and a plug is embedded at the inlet end of the filling hole.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In use, this utility model incorporates a thermal insulation structure within the filling cavity. This structure, together with the subsequently filled thermal insulation material, forms a dual thermal insulation structure of vacuum insulation and filling material. This structure effectively blocks heat transfer through conduction and convection by utilizing the vacuum environment, while the thermal insulation material fills tiny gaps and enhances the heat barrier effect, significantly improving overall thermal insulation efficiency. Furthermore, a reflective thermal insulation coating is provided on the outer surfaces of the two covers, which effectively reflects heat from the external environment. Especially in summer when the underground soil temperature rises, this prevents external heat from penetrating into the filling cavity, maintaining a stable internal temperature and further reducing additional energy consumption caused by the temperature difference between the inside and outside of the pipeline.

[0015] 2. In use, this utility model incorporates an anti-condensation component within the filling cavity. When condensation occurs due to temperature changes within the cavity, the condensate can be promptly drained, effectively preventing its accumulation and potential damage to the insulation filler. This achieves both waterproofing and anti-condensation functions, ensuring long-term stability of the insulation performance. It also prevents the filler from clumping or carbonizing due to moisture, further enhancing the long-term stability of the joint. Simultaneously, a hydrophobic coating is applied to the outer side of the seamless heat shrink sleeve, significantly reducing the adhesion of groundwater to its surface. This allows groundwater to quickly form droplets and slide off, delaying aging and cracking of the seamless heat shrink sleeve caused by prolonged dampness. This significantly enhances the external waterproofing capability of the joint and effectively extends its service life in damp underground environments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 This is a cross-sectional view of the first cover.

[0020] Figure 4 This is a schematic diagram of the thermal insulation structure of this utility model;

[0021] Figure 5 This is a schematic diagram showing the connection between the anti-condensation component of this utility model and the first buckle cover.

[0022] In the diagram: 1. First cover; 2. Second cover; 3. Insert block; 4. Filling cavity; 5. Connecting block; 6. Seamless heat shrink sleeve; 7. Thermal insulation structure; 71. Inner protective film; 72. Thermal insulation core material; 73. Vacuum barrier film; 74. Support column; 8. Reflective thermal insulation coating; 9. Anti-condensation component; 91. Groove; 92. Pipe groove; 93. Collection pipe; 10. Hydrophobic coating; 11. Filling hole; 12. Block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-3 As shown, the waterproof electrofusion insulation joint includes a cover body, which includes a first cover 1 and a second cover 2. The inner surface ends of the second cover 2 and the first cover 1 are fixedly connected with inserts 3. The inserts 3 are used to adapt and connect with the pre-set installation groove of the pipe body to realize the positioning of the first cover 1 and the second cover 2 on the pipe body joint. The internal space between the two inserts 3 and located in the space enclosed by the second cover 2 and the first cover 1 is provided with a filling cavity 4 for accommodating the insulation filler. Both ends of the cover body are provided with connecting blocks 5 for splicing connection. The outside of the connecting blocks 5 is covered with a seamless heat shrink sleeve 6.

[0025] Furthermore, a filling hole 11 is provided on the outer wall of the main body of the cover, and a plug 12 is embedded at the inlet end of the filling hole 11.

[0026] As can be seen from the above, in use, firstly, the two pipes to be connected are welded and fixed. Then, the inserts 3 at the inner wall ends of the first buckle cover 1 and the second buckle cover 2 are respectively inserted into the pre-set installation grooves of the pipes, so that the two buckles cover the outside of the pipe connection. Next, the plug 12 on the first buckle cover 1 or the second buckle cover 2 in the upper position is removed, and thermal insulation filler is injected into the filling cavity 4 to achieve the thermal insulation effect at the pipe connection. After filling, the plug 12 is embedded into the filling hole 11 for sealing. Then, the fixing strap is fastened to the first buckle cover 1 and the second buckle cover 2 by the fixing buckle to complete the assembly and fixing of the two buckles (related structural diagram not shown). Finally, the two spliced ​​connecting blocks 5 are put on the outside of the pipes, and a seamless heat shrink sleeve 6 is put on the outside of the connecting blocks 5. The heat shrink sleeve is shrunk and fitted by heating, and finally the installation of the entire thermal insulation joint at the pipe joint is completed, achieving the dual effect of thermal insulation and waterproofing.

[0027] refer to Figures 2-4As shown, the interior of the filling cavity 4 is provided with a thermal insulation structure 7, which is used to form a dual insulation system in conjunction with the thermal insulation filler.

[0028] The thermal insulation structure 7 includes an inner protective membrane 71 located inside the filling cavity 4. (The inner protective membrane 71 is in direct contact with the outer wall of the pipe or the anti-rust coating on the outer wall of the pipe. The material is usually a high-temperature resistant PE film or fiberglass cloth. Its function is to prevent the core insulation material 72 from being damaged by direct friction with the metal surface of the pipe, and at the same time reduce the adhesion of tiny fibers or particles in the core material to the pipe, ensuring the structural integrity of the core material without affecting the heat blocking effect.) The outer side of the inner protective membrane 71 is provided with the thermal insulation core material 72, which is the core carrier for blocking heat conduction. It is usually a pre-formed arc-shaped / ring-shaped ultra-fine glass wool core material or... The aerogel composite core material must perfectly match the curvature of the pipe to ensure no gaps on the inside. Its extremely low thermal conductivity initially blocks heat transfer from the pipe to the outside, while also providing support for the vacuum barrier membrane 73 to prevent the vacuum cavity from collapsing. The outer part of the heat insulation core material 72 is wrapped with the vacuum barrier membrane 73 (which is the key to maintaining the vacuum environment. The material is a metal composite barrier membrane or a ceramic coated barrier membrane. The vacuum barrier membrane 73 achieves edge sealing through a heat sealing process, which can not only prevent external air and moisture from penetrating and destroying the vacuum, but also further reduce heat conduction through the membrane, ultimately forming a complete vacuum insulation unit).

[0029] The thermal insulation structure 7 also includes support columns 74 connected to the outer wall of the thermal insulation core material 72 (the material is ceramic microspheres or glass fiber, the support columns 74 are scattered or spaced, and only serve to disperse external pressure and maintain the thickness of the vacuum cavity. Because of its extremely low thermal conductivity, it will not add an extra heat transfer path, and it has strong chemical stability to avoid reaction with other materials). The end of the support column 74 away from the thermal insulation core material 72 passes through the vacuum barrier membrane 73 and is connected to the inner wall of the cover body. The outer wall of the cover body is provided with a reflective thermal insulation coating 8, which is composed of highly reflective functional filler and weather-resistant film-forming base material.

[0030] Through the above technical solution:

[0031] After the two covers are installed outside the pipe joint, the thermal insulation structure 7, composed of the inner protective film 71, the thermal insulation core material 72, and the vacuum barrier film 73, will contact the pipe wall and be placed inside the filling cavity 4, forming a double thermal insulation structure with the thermal insulation filler. The vacuum environment can significantly cut off the heat conduction and convection paths, while the thermal insulation filler fills the tiny gaps. The dual effect significantly reduces heat transfer and improves thermal insulation efficiency. At the same time, the reflective thermal insulation coating 8 coated on the outer surface of the two covers can effectively reflect the heat from the external environment, preventing the high underground temperature in summer from entering the filling cavity 4, maintaining the temperature inside the cavity and reducing the extra energy consumption of the pipeline. This solves the problem of insufficient barrier capacity of traditional single thermal insulation materials. In addition, this structure does not significantly increase the volume and weight of the joint, but achieves a leapfrog improvement in thermal insulation performance. Moreover, the vacuum thermal insulation layer is stable for a long time and does not require frequent maintenance. The reflective thermal insulation coating 8 is easy to construct and cost-effective. It can also reduce the loss of thermal insulation filler, extend its life, and reduce the long-term energy consumption of the heating system, taking into account both practicality and economy.

[0032] Additionally, refer to Figure 1 , Figure 2 and Figure 5 As shown, both the second cover 2 and the first cover 1 are equipped with anti-condensation components 9, which are used to promptly drain the condensate generated in the filling cavity 4 due to temperature changes.

[0033] The anti-condensation component 9 includes a groove 91 formed on the inner surface of the cover body. A tube groove 92 is formed on one side of the groove 91 and on the inner wall of the cover body. A collection tube 93 is inserted inside the tube groove 92. The outlet end of the collection tube 93 passes through the cover body and the seamless heat shrink sleeve 6 in sequence and extends to the outside of the seamless heat shrink sleeve 6.

[0034] The outer wall of the seamless heat shrink sleeve 6 is provided with a hydrophobic coating 10, which is made of silicone material.

[0035] Through the above technical solution:

[0036] When condensation occurs in the filling cavity 4 due to temperature changes, the condensate can be discharged promptly through the external drain valve via the cooperation of the groove 91 and the collection pipe 93, preventing condensate accumulation from damaging the insulation filler. This achieves a dual function of waterproofing and preventing condensation, ensuring stable insulation performance and preventing the filler from becoming damp, clumping, or carbonizing, thus improving the long-term stability of the joint. In addition, a hydrophobic coating 10 is added to the outside of the seamless heat shrink sleeve 6, which can significantly reduce the adhesion of groundwater and cause it to slide off quickly, delaying the aging and cracking of the seamless heat shrink sleeve 6 and enhancing the external waterproofing capability. This structure breaks through the traditional single-seal waterproofing approach, working from both the blocking of external moisture and the drainage of internal water accumulation, making the waterproofing and condensation prevention effect more durable.

[0037] In addition, to prevent filler material from entering the groove 91 and causing blockage when filling the filling cavity 4 with insulation material, two interception methods can be adopted: The first method is to attach a thin PE release film or silicone paper to the opening of the groove 91, so that the edge of the film extends beyond both sides of the groove 91, and use high-temperature resistant tape (such as polyimide tape) to fix the edge of the film to the inner wall of the two buckles, while ensuring that the release film completely fits the arc contour of the groove 91 without wrinkles or gaps; when the filler material is filled, it will be blocked outside the groove 91 by the release film and will only accumulate on the outside of the film. After the filler material has cured (or after filling is completed, the groove 92 for inserting the collection tube 93 is reserved in the buckle), the release film can be peeled off from one end with tweezers or hooks. The first method involves removing the filler material, which restores the groove 91 to its open state with no filler residue. The second method uses a combination of breathable non-woven fabric and support mesh for protection. A layer of high-density breathable non-woven fabric is first laid at the opening of the groove 91, allowing only condensation to pass through while blocking fibers. A thin metal support mesh (such as stainless steel wire mesh) is then placed around the outside of the non-woven fabric and secured to the inner wall of the cover with clips. During filling, the fibrous filler material is blocked on the outside by the support mesh and non-woven fabric, while subsequent condensation can pass through the non-woven fabric and fall into the groove 91. The support mesh also prevents the filler material from squeezing and causing the non-woven fabric to dent and block the groove opening. It does not require subsequent removal and can remain at the groove opening long-term as a "debris barrier." Neither of these two interception methods is shown in the attached diagram.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waterproof electrofusion insulation joint, characterized in that: The device includes a main body for fastening covers, which includes a first fastening cover (1) and a second fastening cover (2). The inner surface of the second fastening cover (2) and the first fastening cover (1) are fixedly connected with inserts (3). The inserts (3) are used to adapt and connect with the pre-set mounting groove of the pipe body to realize the positioning of the first fastening cover (1) and the second fastening cover (2) on the pipe body joint. The internal space between the two inserts (3) and the second fastening cover (2) and the first fastening cover (1) is provided with a filling cavity (4) for accommodating the thermal insulation filling material. The filling cavity (4) is provided with a thermal insulation structure (7) to cooperate with the thermal insulation filling material to form a double thermal insulation system. The second fastening cover (2) and the first fastening cover (1) are both provided with anti-condensation components (9) to drain the condensate generated in the filling cavity (4) due to temperature changes in a timely manner.

2. The waterproof electrofusion insulation joint according to claim 1, characterized in that: The thermal insulation structure (7) includes an inner protective membrane (71) disposed inside the filling cavity (4), an insulation core material (72) disposed on the outside of the inner protective membrane (71), and a vacuum barrier membrane (73) wrapped around the outside of the insulation core material (72).

3. The waterproof electrofusion insulation joint according to claim 2, characterized in that: The thermal insulation structure (7) further includes a support column (74) connected to the outer wall of the thermal insulation core material (72). The end of the support column (74) away from the thermal insulation core material (72) passes through the vacuum barrier membrane (73) and is connected to the inner wall of the cover body. The outer wall of the cover body is provided with a reflective thermal insulation coating (8).

4. The waterproof electrofusion insulation joint according to claim 1, characterized in that: Both ends of the main body of the cover are provided with connecting blocks (5) for splicing connection, and the outside of the connecting blocks (5) is covered with a seamless heat shrink sleeve (6).

5. The waterproof electrofusion insulation joint according to claim 4, characterized in that: The anti-condensation component (9) includes a groove (91) formed on the inner surface of the cover body. A tube groove (92) is formed on one side of the groove (91) and on the inner wall of the cover body. A collection tube (93) is inserted inside the tube groove (92). The outlet end of the collection tube (93) passes through the cover body and the seamless heat shrink sleeve (6) in sequence and extends to the outside of the seamless heat shrink sleeve (6).

6. The waterproof electrofusion insulation joint according to claim 4, characterized in that: The outer wall of the seamless heat shrink sleeve (6) is provided with a hydrophobic coating (10).

7. The waterproof electrofusion insulation joint according to claim 1, characterized in that: The outer wall of the cover body is provided with a filling hole (11), and a plug (12) is embedded at the inlet end of the filling hole (11).

Images