Flame-retardant and heat-insulating structure for light-weight wires and cables
By adopting a lightweight structural design of a buffer layer, insulation layer, thermal insulation layer, flame retardant layer and sheath on the outside of the cable, combined with silicon carbide material and spiral wrapping method, the problem of excessive weight of existing cables is solved, and the effects of lightweight and efficient flame retardant and heat insulation are achieved.
Patent Information
- Application Number
- CN202422531669.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The existing flame retardant structure of cables is excessively heavy due to the flame retardant sheath on the outside and the armor layer and glass fiber cloth on the inside.
It adopts a lightweight wire and cable structure, including a buffer layer, an insulation layer, a thermal insulation layer, a first and a second flame retardant layer, a heat dissipation layer and a flame retardant sheath wrapped around the outside of the wire core. Silicon carbide material is used to disperse heat, and the connection is enhanced by spiral wrapping and a fixed ring structure to reduce weight and improve flame retardant and thermal insulation effects.
It achieves lightweight flame-retardant and heat-insulating effects, while improving the ability to quickly disperse heat, reducing heat concentration in cables during fires, preventing the wire core from melting, and preventing the cables from spreading through a fixed ring structure.
Smart Images
Figure CN223427268U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cable production and manufacturing, in particular to a flame retardant heat insulation structure for lightweight wires and cables. Background Art
[0002] Cable is a general term for items such as optical cables and electrical cables. Cables have numerous uses, primarily controlling installations, connecting devices, and transmitting power, making them a common and indispensable part of everyday life. Existing cables are flame-retardant primarily by adding a flame-retardant sheath on the outside, armoring layers on the inside, and wrapping with fiberglass cloth, mica tape, and other materials. This makes the cables excessively heavy. Therefore, lightweight flame-retardant and thermally insulated structures for wires and cables were designed to address this issue. Utility Model Content
[0003] (1) Technical problems solved
[0004] In response to the deficiencies in the existing technology, the utility model provides a flame-retardant and heat-insulating structure for lightweight wires and cables, which solves the problem of excessive weight in existing cables, which are mainly achieved by sheathing a flame-retardant sheath on the outside, adding an armor layer inside, and wrapping with glass fiber cloth, mica tape, etc.
[0005] (2) Technical solution
[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:
[0007] The utility model provides a flame-retardant and heat-insulating structure for lightweight wires and cables, comprising: a wire core, a buffer layer wrapped around the outside of the wire core, an insulating layer wrapped around the outside of the buffer layer, a thermal insulation layer wrapped around the outside of the thermal insulation layer, a first flame-retardant layer of the thermal insulation layer, a heat dissipation layer on the outside of the first flame-retardant layer, a second flame-retardant layer wrapped around the outside of the heat dissipation layer, a flame-retardant sheath wrapped around the outside of the second flame-retardant layer, the flame-retardant sheath being made of polyvinyl chloride, the second flame-retardant layer and the first flame-retardant layer being both mica tapes, the first flame-retardant layer and the second flame-retardant layer being connected to each other at their outer edges, the heat dissipation layers inside the first flame-retardant layer and the second flame-retardant layer being made of silicon carbide, and the thermal insulation layer being made of fiberglass.
[0008] Preferably, the inner walls of the first flame retardant layer and the second flame retardant layer are laminated with polytetrafluoroethylene films.
[0009] Preferably, the thermal insulation layer, the first flame retardant layer, the heat dissipation layer and the second flame retardant layer are all two layers, the thermal insulation layer is spirally wrapped around the outside of the insulating layer, and the first flame retardant layer, the heat dissipation layer and the second flame retardant layer are also spirally wrapped around the outside of the thermal insulation layer.
[0010] Preferably, the inner side of the inner wall of the flame-retardant sheath is connected with a fixed grid in a grid shape, and the fixed grid is made of steel material.
[0011] Preferably, the insulation layer and the temperature insulation layer, the temperature insulation layer and the first flame-retardant layer, and the second flame-retardant layer and the flame-retardant sheath are all filled with talcum powder.
[0012] Preferably, the outer side of the second flame-retardant layer and the inner side of the flame-retardant sheath are sleeved with a fixed ring, the fixed ring comprises an outer sleeve ring with grooves at both ends and an inner sleeve ring with protrusions at both ends, the inner sleeve ring and the outer sleeve ring are inserted and connected, and the connection between the inner sleeve ring and the outer sleeve ring is an interference fit.
[0013] Preferably, the length of the fixed ring is between five centimeters and ten centimeters, the outer sleeve ring is made of carbon steel material, and the inner sleeve ring is made of austenitic stainless steel material.
[0014] (Three) beneficial effects
[0015] The utility model provides a kind of lightweight flame-retardant heat insulation structure for electric wire and cable, compared with prior art, at least with following beneficial effects:
[0016] The lightweight flame-retardant heat insulation structure for electric wire and cable removes the traditional relatively bulky armored layer, and quickly disperses heat by silicon carbide to achieve the purpose of flame-retardant heat insulation and weight reduction. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the structure diagram of the utility model;
[0018] Figure 2 It is the sectional view of the utility model;
[0019] Figure 3 It is the explosion diagram of the utility model;
[0020] Figure 4 It is the wrapping diagram of the utility model.
[0021] In the drawing: 1, core; 2, buffer layer; 3, insulation layer; 4, temperature insulation layer; 5, first flame-retardant layer; 6, heat dissipation layer; 7, second flame-retardant layer; 8, flame-retardant sheath; 21, fixed grid; 22, fixed ring; 23, outer sleeve ring; 24, inner sleeve ring. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0023] See also Figures 1-4 The utility model provides a technical solution: a flame retardant and heat-insulating structure for lightweight wires and cables, comprising: a wire core 1, a buffer layer 2 wrapped around the outside of the wire core 1, an insulating layer 3 wrapped around the outside of the buffer layer 2, a thermal insulation layer 4 wrapped around the outside of the thermal insulation layer 3, a first flame retardant layer 5 of the thermal insulation layer 4, a heat dissipation layer 6 on the outside of the first flame retardant layer 5, a second flame retardant layer 7 wrapped around the outside of the heat dissipation layer 6, a flame retardant sheath 8 wrapped around the outside of the second flame retardant layer 7, the flame retardant sheath 8 is made of polyvinyl chloride, the second flame retardant layer 7 and the first flame retardant layer 5 are both mica tapes, the first flame retardant layer 5 and the second flame retardant layer 7 are connected to each other at their outer edges, the heat dissipation layer 6 inside the first flame retardant layer 5 and the second flame retardant layer 7 is made of silicon carbide, and the thermal insulation layer 4 is made of glass fiber.
[0024] During use, when a fire occurs outside, the flame retardant sheath 8 can play the flame retardant effect of the first layer, and the heat will be conducted to the second flame retardant layer 7 through the flame retardant sheath 8. After the second flame retardant layer 7 blocks part of the heat, it will be conducted to the heat dissipation layer 6. The heat dissipation layer 6 is made of silicon carbide and has good thermal conductivity. It can quickly absorb heat and conduct it to the inside of the surrounding heat dissipation layer 6, conduct the heat out, and increase the heat dissipation area to prevent heat from being concentrated in one place, causing the wire core 1 to melt. Then the first flame retardant layer 5 and the thermal insulation layer 4 will block a large amount of heat on the outside, reducing the heat entering the cable.
[0025] like Figures 1-4 As shown, the embodiment of the present invention provides an implementation method. Based on the above implementation method, the inner walls of the first flame retardant layer 5 and the second flame retardant layer 7 are adhered with polytetrafluoroethylene films.
[0026] Analysis of the above structure shows that the polytetrafluoroethylene film bonded to the inner walls of the first flame retardant layer 5 and the second flame retardant layer 7 can prevent the silicon carbide of the heat dissipation layer 6 from scattering through the first flame retardant layer 5 and the second flame retardant layer 7, resulting in uneven heat conduction.
[0027] like Figures 1-4As shown, an embodiment of the utility model provides an implementation method. Based on the above implementation method, the thermal insulation layer 4, the first flame retardant layer 5, the heat dissipation layer 6 and the second flame retardant layer 7 are all two, and the thermal insulation layer 4 is spirally wrapped on the outside of the insulating layer 3, and the first flame retardant layer 5, the heat dissipation layer 6 and the second flame retardant layer 7 are also spirally wrapped on the outside of the thermal insulation layer 4.
[0028] From the analysis of the above structure, it can be seen that the thermal insulation layer 4, the first flame retardant layer 5, the heat dissipation layer 6 and the second flame retardant layer 7 are all wrapped in a spiral shape, which reduces the bending and folding of the cable and facilitates production and processing.
[0029] like Figures 1-3 As shown, the embodiment of the present invention provides an implementation method. Based on the above implementation method, a grid-shaped fixed grid 21 is connected to the inner side of the inner wall of the flame retardant sheath 8, and the fixed grid is made of steel.
[0030] From the analysis of the above structure, it can be seen that after the flame retardant sheath 8 is burned out, the fixed grid 21 will be sheathed on the outside to prevent the cable from falling apart.
[0031] like Figures 1-3 As shown, an embodiment of the present invention provides an implementation method. Based on the above implementation method, talcum powder is filled between the insulating layer 3 and the thermal insulation layer 4, between the thermal insulation layer 4 and the first flame retardant layer 5, and between the second flame retardant layer 7 and the flame retardant sheath 8.
[0032] From the analysis of the above structure, it can be seen that talcum powder can isolate, lubricate and prevent adhesion, while reducing the friction between the shell and the core wire, and playing a good peeling role.
[0033] like Figures 1-3 As shown, an embodiment of the utility model provides an implementation method. Based on the above implementation method, a fixing ring 22 is provided on the outside of the second flame retardant layer 7 and on the inside of the flame retardant sheath 8. The fixing ring 22 includes an outer ring 23 with grooves at both ends and an inner ring 24 with protrusions at both ends. The inner ring 24 is inserted and connected to the outer ring 23, and the connection between the inner ring 24 and the outer ring 23 is an interference fit.
[0034] From the analysis of the above structure, it can be seen that a fixing ring 22 is set every ten to fifteen meters. During installation, the outer ring 23 is first frozen, and then the outer ring 23 and the inner ring 24 are connected together, and the outer ring 23 is allowed to return to normal temperature. When a fire occurs and the outer side of the cable is burned off, the fixing ring 22 can prevent the cable from spreading.
[0035] like Figures 1-3As shown, an embodiment of the present invention provides an implementation method. Based on the above implementation method, the length of the fixing ring 22 is between five centimeters and ten centimeters, the outer ring 23 is made of carbon steel, and the inner ring 24 is made of austenitic stainless steel.
[0036] From the analysis of the above structure, it can be seen that the outer ring 23 is made of carbon steel and the inner ring 24 is made of austenitic stainless steel. In the event of a fire, the expansion coefficient of carbon steel is much smaller than the expansion coefficient of austenitic stainless steel. At the same time, the two are interference fit during installation and fixation. At this time, the inside of the outer ring 23 is squeezed inward and the inner ring 24 expands outward, making the connection more secure and preventing the cable from loosening. The length of the fixing ring 22 is between five centimeters and ten centimeters. When the inside of the cable burns to the inside of the fixing ring 22, due to the high melting point of the fixing ring 22, it is not easy to melt, and it is easy to form an annular space inside, which will allow oxygen to enter only through one end to help combustion, which can effectively slow down or even extinguish the flame.
[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A flame retardant heat insulation structure for lightweight wires and cables, characterized in that: include: A wire core (1), the outer side of the wire core (1) is wrapped with a buffer layer (2), the outer side of the buffer layer (2) is wrapped with an insulation layer (3), the outer side of the insulation layer (3) is wrapped with a thermal insulation layer (4), the thermal insulation layer (4) has a first flame retardant layer (5), the outer side of the first flame retardant layer (5) is a heat dissipation layer (6), the outer side of the heat dissipation layer (6) is wrapped with a second flame retardant layer (7), the outer side of the second flame retardant layer (7) is wrapped with a flame retardant sheath (8), the flame retardant sheath (8) is made of polyvinyl chloride, the second flame retardant layer (7) and the first flame retardant layer (5) are both mica tapes, the outer edges of the first flame retardant layer (5) and the second flame retardant layer (7) are connected to each other, the heat dissipation layer (6) inside the first flame retardant layer (5) and the second flame retardant layer (7) is made of silicon carbide, and the thermal insulation layer (4) is made of glass fiber.
2. The flame-retardant heat-insulating structure for lightweight wires and cables according to claim 1, characterized in that: The inner walls of the first flame retardant layer (5) and the second flame retardant layer (7) are bonded with polytetrafluoroethylene films.
3. The flame-retardant heat-insulating structure for lightweight wires and cables according to claim 1, characterized in that: The thermal insulation layer (4), the first flame retardant layer (5), the heat dissipation layer (6) and the second flame retardant layer (7) are all two layers; the thermal insulation layer (4) is wrapped in a spiral shape on the outside of the insulating layer (3); and the first flame retardant layer (5), the heat dissipation layer (6) and the second flame retardant layer (7) are also wrapped in a spiral shape on the outside of the thermal insulation layer (4).
4. The flame-retardant heat-insulating structure for lightweight wires and cables according to claim 1, characterized in that: A grid-shaped fixed grid (21) is connected to the inner side of the inner wall of the flame-retardant sheath (8), and the fixed grid is made of steel.
5. The flame-retardant heat-insulating structure for lightweight wires and cables according to claim 1, characterized in that: Talc powder is filled between the insulating layer (3) and the thermal insulation layer (4), between the thermal insulation layer (4) and the first flame retardant layer (5), and between the second flame retardant layer (7) and the flame retardant sheath (8).
6. The flame-retardant heat-insulating structure for lightweight wires and cables according to claim 1, characterized in that: A fixing ring (22) is provided on the outer side of the second flame retardant layer (7) and on the inner side of the flame retardant sheath (8). The fixing ring (22) includes an outer ring (23) with grooves at both ends and an inner ring (24) with protrusions at both ends. The inner ring (24) and the outer ring (23) are inserted and connected, and the connection between the inner ring (24) and the outer ring (23) is an interference fit.
7. The flame-retardant heat-insulating structure for lightweight wires and cables according to claim 6, characterized in that: The length of the fixing ring (22) is between five centimeters and ten centimeters. The outer ring (23) is made of carbon steel, and the inner ring (24) is made of austenitic stainless steel.