Seamless thermal shrinkage sleeve for pipeline joint coating
By installing support wires inside the radiation crosslinked polyvinyl substrate of the heat shrink sleeve and introducing tight wires into the hot melt adhesive layer, the problem of inability to withstand pressure and lack of fixed tightening structure in the pipe replenishment in the prior art is solved. , realizes efficient tightening and close seamless connection of pipeline replenishment.
Patent Information
- Application Number
- CN202420439470.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-07
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-03-07
AI Technical Summary
The existing heat shrink sleeve cannot achieve the pressure under the original pipe wall at the pipe fixing opening, and the lack of a fixed tightening structure, resulting in gaps at the connection, affecting the connection effect.
Support wire is provided inside the radiation crosslinked polyvinyl substrate, and tight wire is introduced into the hot melt adhesive layer and PE protective layer. The support wire shrinks intensively when shrinking, and the tight wire extends outward through the tightening slot and wraps around. Tighten to enhance the tightness of the shrink sleeve and pipe.
The pipe replenishment can withstand the pressure of the fluid in the original pipe, and avoid degumming and loosening at the joints, improve the strength and stability of the shrink sleeve, and ensure a close-seamless connection effect.
Smart Images
Figure CN222229885U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat shrink sleeves, in particular to a seamless heat shrink sleeve for patching a pipe. Background Art
[0002] Heat shrink sleeve is a kind of heat shrink material, which is mainly divided into three layers. The inner layer is epoxy primer coated on the surface of steel pipe, the middle layer is hot melt adhesive, and the outer layer is improved radiation cross-linked polyethylene substrate. Heat shrink sleeve is mainly used in various pipeline anti-corrosion, thermal insulation, patching, rust prevention and other projects. It has the characteristics of anti-corrosion, anti-rust, waterproof and pipeline protection.
[0003] In the existing heat shrink sleeves for pipeline anti-corrosion, insulation, patching, rust prevention and other projects, the heat shrink sleeve patching part cannot withstand the pressure of the original pipeline wall. At the same time, since there is no fixed tightening structure at the connection between the heat shrink sleeve and the pipeline, the heat shrink material itself cannot be completely tightened, resulting in gaps at the connection, affecting the connection effect of the heat shrink sleeve. Therefore, this patent needs to be upgraded and modified based on the existing technology. Utility Model Content
[0004] In view of the shortcomings of the prior art, the present application provides a seamless heat shrink sleeve for pipe patching, which overcomes the shortcomings of the prior art and aims to solve the problem that the heat shrink sleeve patching cannot withstand the pressure of the original pipe wall, and at the same time, there is no fixed tightening structure at the connection between the heat shrink sleeve and the pipe, and the heat shrink material itself cannot be fully tightened, resulting in gaps at the connection, affecting the connection effect of the heat shrink sleeve.
[0005] In order to solve the above problems, the following technical solutions are provided:
[0006] A seamless heat shrink sleeve for pipe patching comprises a hot melt adhesive layer, a radiation cross-linked polyethylene substrate, and a PE protective layer. The hot melt adhesive layer is a cylindrical structure. The hot melt adhesive layer is arranged on the inner side of the radiation cross-linked polyethylene substrate. The hot melt adhesive layer is tightly attached to the inner side of the radiation cross-linked polyethylene substrate. The radiation cross-linked polyethylene substrate is arranged on the inner side of the PE protective layer. The radiation cross-linked polyethylene substrate is tightly attached to the inner side of the radiation cross-linked polyethylene substrate. A supporting iron wire is arranged inside the radiation cross-linked polyethylene substrate. A plurality of supporting iron wires are arranged inside the radiation cross-linked polyethylene substrate in a circumferential arrangement order.
[0007] By adopting the above technical solution, a supporting iron wire is arranged inside the radiation cross-linked polyethylene substrate. When the radiation cross-linked polyethylene substrate is patched, the supporting iron wire will also shrink densely when tightened. After the shrink sleeve is patched on the pipe, it is ensured that the pipe patch can withstand the pressure of the fluid in the original pipe.
[0008] As a preferred technical solution of the present application, a fastening iron wire is provided between the PE protective layer and the radiation cross-linked polyethylene substrate. The fastening iron wire is provided with two fastening iron wires respectively arranged at the front and rear ends of the PE protective layer. The fastening iron wire is slidably connected inside the PE protective layer and the radiation cross-linked polyethylene substrate.
[0009] By adopting the above technical solution, the two ends of the pipeline are fastened by the tightening wire, which effectively avoids the phenomenon of debonding and loosening at the joint after a long time.
[0010] As a preferred technical solution of the present application, a fastening groove is provided on one side of the PE protective layer, and the front and rear ends of the fastening wire extend into the inside of the fastening groove.
[0011] By adopting the above technical solution, during the process of shrinking the shrink sleeve on the pipe, the fastening wire will extend outward through the fastening groove, and then the shrink sleeve and the pipe connection will be fastened by wrapping and tightening the front and rear ends of the fastening wire.
[0012] As a preferred technical solution of the present application, the fixing wire and the supporting wire are made of the same kind of tensile-resistant metal material.
[0013] By adopting the above technical solution, the tensile metal material improves the strength and stability of the shrink sleeve, and the supporting iron wire arranged in the radiation cross-linked polyethylene substrate can enhance the bearing capacity of the patching joint.
[0014] As a preferred technical solution of the present application, a layer of epoxy primer is provided inside the hot melt adhesive layer, and a moisture-proof coating is provided between the radiation cross-linked polyethylene substrate and the hot melt adhesive layer.
[0015] By adopting the above technical scheme, the epoxy primer is an anti-corrosion primer with the characteristics of strong adhesion and high chemical stability. The moisture-proof coating has certain elongation, elasticity, plasticity, crack resistance, impermeability and weather resistance, and can play a waterproof, anti-seepage and protective role.
[0016] As a preferred technical solution of the present application, the thickness of the hot melt adhesive layer is greater than the thickness of the radiation cross-linked polyethylene substrate, and the hot melt adhesive layer, the radiation cross-linked polyethylene substrate, and the PE protective layer constitute the main body of the heat shrinkable sleeve.
[0017] By adopting the above technical scheme, the hot melt adhesive layer is heated to a molten state and can flow and be coated on the substrate, and has good adhesion to both metal and plastic. After being heated, the radiation cross-linked polyethylene substrate shrinks radially and the hot melt adhesive layer melts and can be tightly wrapped around the patch, achieving a nearly seamless state. The PE protective layer can play a certain protective role on the shrink sleeve as a whole to prevent corrosion from external acids and alkalis.
[0018] Compared with the prior art, the beneficial effects of the utility model are:
[0019] 1. In the present invention, the supporting iron wire 3 is arranged inside the radiation cross-linked polyethylene substrate 2, so that the overall bearing capacity of the shrink sleeve is enhanced. After heating, when the radiation cross-linked polyethylene substrate 2 shrinks radially and the hot melt adhesive layer 1 melts and can be tightly wrapped at the patching mouth, the radially contracted radiation cross-linked polyethylene substrate 2 will drive the supporting iron wire 3 to follow the dense contraction, thereby increasing the overall stress of the shrink sleeve, realizing the patching of the pipeline, and ensuring that the patching mouth of the pipeline can withstand the pressure of the fluid in the original pipeline;
[0020] 2. In the utility model, by setting the fastening wires 4 at the front and rear ends of the radiation cross-linked polyethylene substrate 2, during the shrink sleeve shrinking the pipe, the fastening wires 4 will extend outward through the fastening notches 6, and then the front and rear ends of the fastening wires 4 are wound and tightened to achieve the tightening work of the shrink sleeve and the pipe joint;
[0021] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0023] Figure 1 It is a schematic diagram of the side section structure of a seamless heat shrink sleeve for patching a pipe according to the utility model;
[0024] Figure 2 The utility model is a schematic structural diagram of a seamless heat shrink sleeve for patching pipe joints according to the present invention from a top perspective.
[0025] In the figure: 1. hot melt adhesive layer; 2. radiation cross-linked polyethylene substrate; 3. supporting iron wire; 4. fastening iron wire; 5. PE protective layer; 6. fastening notch. DETAILED DESCRIPTION
[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0027] like Figure 1 - Figure 2As shown, a seamless heat shrink sleeve for pipe patching includes a hot melt adhesive layer 1, a radiation cross-linked polyethylene substrate 2, and a PE protective layer 5. The hot melt adhesive layer 1 is a cylindrical structure. The hot melt adhesive layer 1 is arranged on the inner side of the radiation cross-linked polyethylene substrate 2. The hot melt adhesive layer 1 is tightly attached to the inner side of the radiation cross-linked polyethylene substrate 2. The radiation cross-linked polyethylene substrate 2 is arranged on the inner side of the PE protective layer 5. The radiation cross-linked polyethylene substrate 2 is tightly attached to the inner side of the radiation cross-linked polyethylene substrate 2. A supporting iron wire 3 is arranged inside the radiation cross-linked polyethylene substrate 2. A plurality of supporting iron wires 3 are arranged inside the radiation cross-linked polyethylene substrate 2 in a circular arrangement order. The supporting iron wire 3 is arranged inside the radiation cross-linked polyethylene substrate 2. When the radiation cross-linked polyethylene substrate 2 is used to patch the pipe, the supporting iron wire 3 will also shrink densely when tightened. After the shrink sleeve patches the pipe, it is ensured that the pipe patch can withstand the pressure of the fluid in the original pipe.
[0028] In this embodiment, if Figure 1 - Figure 2 As shown, a fastening wire 4 is provided between the PE protective layer 5 and the radiation cross-linked polyethylene substrate 2. The fastening wire 4 has two fastening wires respectively arranged at the front and rear ends of the PE protective layer 5. The fastening wire 4 is slidably connected inside the PE protective layer 5 and the radiation cross-linked polyethylene substrate 2. The fastening wire 4 fastens the two ends of the pipe connection, effectively avoiding debonding and loosening at the connection after a long time.
[0029] In this embodiment, if Figure 1 - Figure 2 As shown,
[0030] A fastening groove 6 is provided on one side of the PE protective layer 5, and the front and rear ends of the fastening wire 4 extend into the fastening groove 6. During the process of shrinking the pipeline by the shrink sleeve, the fastening wire 4 will extend outward through the fastening groove 6, and then the front and rear ends of the fastening wire 4 extended out are wrapped and tightened to achieve the tightening work at the connection between the shrink sleeve and the pipeline.
[0031] In this embodiment, if Figure 1 - Figure 2 As shown, the fastening wire 4 and the supporting wire 3 are made of the same kind of tensile-resistant metal material. The tensile-resistant metal material improves the strength and stability of the shrink sleeve. The supporting wire 3 arranged in the radiation cross-linked polyethylene substrate 2 can enhance the bearing capacity of the patching joint.
[0032] In this embodiment, if Figure 1 - Figure 2 As shown, a layer of epoxy primer is provided inside the hot melt adhesive layer 1, and a moisture-proof coating is provided between the radiation cross-linked polyethylene substrate 2 and the hot melt adhesive layer 1. The epoxy primer is an anti-corrosion primer with the characteristics of strong adhesion and high chemical stability. The moisture-proof coating has certain elongation, elastic-plasticity, crack resistance, impermeability and weather resistance, and can play a role in waterproofing, anti-seepage and protection.
[0033] In this embodiment, if Figure 1 - Figure 2 As shown,
[0034] The thickness of the hot melt adhesive layer 1 is greater than that of the radiation cross-linked polyethylene substrate 2. The hot melt adhesive layer 1, the radiation cross-linked polyethylene substrate 2, and the PE protective layer 5 constitute the main body of the heat shrinkable sleeve. The hot melt adhesive layer 1 is heated to a molten state and can flow and be coated on the substrate. It has good adhesion to both metal and plastic. After being heated, the radiation cross-linked polyethylene substrate 2 shrinks radially and the hot melt adhesive layer 1 melts and can be tightly wrapped around the patch, achieving a nearly seamless state. The PE protective layer 5 can play a certain protective role on the entire shrinkable sleeve to prevent external acid and alkali erosion.
[0035] The use principle and use process of the utility model are as follows: by arranging the supporting iron wire 3 inside the radiation cross-linked polyethylene substrate 2, the overall bearing capacity of the shrink sleeve is enhanced; after heating, when the radiation cross-linked polyethylene substrate 2 shrinks radially and the hot-melt adhesive layer 1 melts and can be tightly wrapped around the patch, the radially contracted radiation cross-linked polyethylene substrate 2 will drive the supporting iron wire 3 to follow the intensive contraction, thereby increasing the overall stress of the shrink sleeve, thereby achieving the patching of the pipeline and ensuring that the patching of the pipeline can withstand the pressure of the fluid in the original pipeline; by arranging the fastening iron wire 4 at the front and rear ends of the radiation cross-linked polyethylene substrate 2, during the process of the shrink sleeve shrinking the pipeline by patching, the fastening iron wire 4 will extend outward through the fastening groove 6, and then the front and rear ends of the fastening iron wire 4 will be wound and tightened to achieve the tightening work of the shrink sleeve and the connection between the pipeline.
[0036] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A seamless heat shrink sleeve for pipe patching, characterized in that: The invention comprises a hot melt adhesive layer (1), a radiation cross-linked polyethylene substrate (2), and a PE protective layer (5); the hot melt adhesive layer (1) is a cylindrical structure; the hot melt adhesive layer (1) is arranged on the inner side of the radiation cross-linked polyethylene substrate (2); the hot melt adhesive layer (1) is tightly attached to the inner side of the radiation cross-linked polyethylene substrate (2); the radiation cross-linked polyethylene substrate (2) is arranged on the inner side of the PE protective layer (5); the radiation cross-linked polyethylene substrate (2) is tightly attached to the inner side of the radiation cross-linked polyethylene substrate (2); a supporting iron wire (3) is arranged inside the radiation cross-linked polyethylene substrate (2); a plurality of supporting iron wires (3) are arranged in a circular arrangement order inside the radiation cross-linked polyethylene substrate (2).
2. A seamless heat shrink sleeve for pipe joint patching according to claim 1, characterized in that: A fastening iron wire (4) is provided between the PE protective layer (5) and the radiation cross-linked polyethylene substrate (2); the fastening iron wire (4) has two fastening iron wires respectively provided at the front and rear ends of the PE protective layer (5); and the fastening iron wire (4) is slidably connected inside the PE protective layer (5) and the radiation cross-linked polyethylene substrate (2).
3. A seamless heat shrink sleeve for pipe joint patching according to claim 2, characterized in that: A fastening notch (6) is provided on one side of the PE protective layer (5), and the front and rear ends of the fastening iron wire (4) extend into the interior of the fastening notch (6).
4. A seamless heat shrink sleeve for pipe joint patching according to claim 2, characterized in that: The fastening iron wire (4) and the supporting iron wire (3) are made of the same kind of metal material with tensile strength.
5. The seamless heat shrink sleeve for pipe joint patching according to claim 1, characterized in that: A layer of epoxy primer is provided inside the hot melt adhesive layer (1), and a moisture-proof coating is provided between the radiation cross-linked polyethylene substrate (2) and the hot melt adhesive layer (1).
6. The seamless heat shrink sleeve for pipe joint patching according to claim 1, characterized in that: The thickness of the hot melt adhesive layer (1) is greater than the thickness of the radiation cross-linked polyethylene substrate (2); the hot melt adhesive layer (1), the radiation cross-linked polyethylene substrate (2), and the PE protective layer (5) constitute the heat shrink sleeve body.