Mica tape winding type high-temperature-resistant cable
By using an alternating double-layer mica tape and fiberglass braided layer structure, the problems of insulation material aging and mica tape cracking in existing cables at high temperatures are solved, thereby improving the high-temperature fire resistance and high-temperature resistance of the cable.
Patent Information
- Application Number
- CN202422986810.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-12-04
AI Technical Summary
The heat resistance of existing enameled and wrapped wires cannot be further improved. Carbon-based organic insulation materials are prone to aging at high temperatures, and mica tape wrapped wires are prone to cracking and delamination when the conductor is bent, resulting in a decrease in insulation reliability.
The cable employs a double-layered mica tape and fiberglass braided layer structure with staggered arrangement. The mica tape uses a fluorophlogopite structure, and the fiberglass uses alkali-free fiberglass or high-silica sand. The wrapping overlap rate is greater than 15%, and the wrapping is staggered in clockwise and counterclockwise directions to enhance the cable's high-temperature resistance.
It improves the fire resistance and high temperature resistance of the cable, prevents the mica tape from cracking and delaminating, and enhances the overall high temperature resistance of the cable.
Smart Images
Figure CN223808933U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to cable technical field especially relates to a mica tape winding type high temperature resistant cable. BACKGROUND
[0002] The enameled wire or the round wire generally adopts the carbon-based organic insulating paint as the main insulating material, therefore, so far, the highest heat resistance grade of the enamelated wire is 240, that is, can work continuously at 240 DEG C for 20000 hours, and the highest heat resistance grade of the round wire is 200, that is, can work continuously at 200 DEG C for 20000 hours.The main reason that the heat resistance grade cannot continue to improve is that the carbon-based organic insulating material will obviously heat-aging in the long-term high temperature state, and due to the action of external voltage, the organic molecular chain of the insulating layer breaks, and the electric insulating property decreases or even disappears.
[0003] The traditional round wire often adopts aramid, polyester, polyester imine as the adhesive to fix the round film material or the mica tape material, therefore, the general temperature resistance grade of the round wire is not more than 200 DEG C.If only the mica is used for the round insulation, the winding capacity of the mica tape round wire is weak, is easy to crack, delamination due to the conductor bending deformation, and even the mica peeling, leading to the destruction of the insulation reliability. SUMMARY
[0004] According to the above-mentioned technical problem to be solved, a mica tape winding type high temperature resistant cable is provided.
[0005] To achieve the above-mentioned purpose, the utility model discloses a mica tape winding type high temperature resistant cable, including the core and the insulating layer of wrapping on the core surface, the insulating layer includes the staggered mica tape and glass fiber, the mica tape includes the first mica round braid layer and the second mica round braid layer of wrapping on the core surface, the first mica round braid layer surface is wrapped with the first glass fiber braided layer, and the first glass fiber braided layer surface is wrapped with the second mica round braid layer, and the second mica round braid layer surface is wrapped with the second glass fiber braided layer.
[0006] Further, the first mica round braid layer is wrapped on the core surface in clockwise or counterclockwise.
[0007] Further, the second mica round braid layer and the first mica round braid layer are opposite in wrapping direction.
[0008] Further, the wrapping overlap rate of the first mica round braid layer and the second mica round braid layer is greater than 15%.
[0009] Further, the mica tape adopts fluorine mica structure.
[0010] Further, the first glass fiber braided layer and the second glass fiber braided layer are of the same structure, and the glass fiber is made of alkali-free glass fiber or high-silica sand.
[0011] Compared with the prior art, the mica tape winding type high-temperature-resistant cable has the advantages that: the double-layer mica tape wrapping structure improves the fireproof performance and high-temperature-resistant performance of the cable, the glass fiber staggered with the mica tape limits the displacement of the mica tape, and the delamination and peeling caused by mica cracking are avoided, thereby affecting the high-temperature-resistant effect. BRIEF DESCRIPTION OF DRAWINGS
[0012] The utility model will be further described in detail in combination with the drawings and specific embodiments.
[0013] Figure 1 It is an overall structure schematic view of the utility model.
[0014] In the figure: 1 is a core; 2 is a first mica wrapping layer; 3 is a first glass fiber braided layer; 4 is a second mica wrapping layer; 5 is a second glass fiber braided layer. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0016] In one embodiment of the utility model, as shown in the figure, Figure 1 The insulation layer includes staggered mica tape and glass fiber, the mica tape includes the first mica wrapping layer 2 and the second mica wrapping layer 4 wrapped around the surface of the core 1, the first mica wrapping layer 2 is wrapped with the first glass fiber braided layer 3 on the surface, the first glass fiber braided layer 3 is wrapped with the second mica wrapping layer 4 on the surface, the second mica wrapping layer 4 is wrapped with the second glass fiber braided layer 5 on the surface, the core material is selected from oxygen-free copper wire, nickel-plated copper wire or pure nickel wire according to the use environment, the inner layer mica tape is wrapped, and the outer layer glass fiber braided layer is used as a sheath insulation, four layers of fire-resistant and high-temperature-resistant insulation protection, and the high-temperature-resistant performance of the cable is improved.
[0017] The first mica wrapping layer 2 is wrapped on the surface of the core 1 in a clockwise or counterclockwise direction, the second mica wrapping layer 4 is opposite to the wrapping direction of the first mica wrapping layer 2, the structure of the two sides of the mica tape with opposite wrapping directions ensures the consistency of the overall structure of the cable, the eccentricity rate is low, the thickness is uniform, and the current is not easy to break down.
[0018] The wrapping overlap rate of the first mica wrapping layer 2 and the second mica wrapping layer 4 is greater than 15%, which improves the high-temperature resistance of the cable by improving the wrapping overlap rate, and avoids delamination and peeling of the mica tape.
[0019] The mica tape adopts a fluorophlogopite structure, and the high-temperature resistance is further improved from the material aspect by the alloy mica tape structure.
[0020] The first glass fiber braiding layer 3 and the second glass fiber braiding layer 5 are of the same structure, and the glass fiber adopts alkali-free glass fiber or high-silica sand, which improves the insulation performance and high-temperature resistance.
[0021] The points to be explained are as follows: firstly, in the description of the present application, it is necessary to explain that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change; secondly, in this paper, the relationship terms such as first and second are only used to distinguish one entity from another, and do not necessarily require or imply any actual relationship or order between the entities.
[0022] The above examples are only illustrative of the present application, and do not constitute a limitation on the protection scope of the present application, and any design identical or similar to the present application belongs to the protection scope of the present application.
Claims
1. A mica tape wrapped high temperature resistant cable comprising a core (1) and an insulation layer wrapped around the core (1), characterized in that, The insulating layer comprises mica tapes and glass fibers arranged alternately, the mica tapes comprise a first mica wrapping layer (2) and a second mica wrapping layer (4) wrapped around the surface of the core (1), the surface of the first mica wrapping layer (2) is wrapped with a first glass fiber woven layer (3), the surface of the first glass fiber woven layer (3) is wrapped with the second mica wrapping layer (4), and the surface of the second mica wrapping layer (4) is wrapped with a second glass fiber woven layer (5).
2. A mica tape wrapped high temperature resistant cable as claimed in claim 1, wherein, The first mica wrapping layer (2) is wrapped around the surface of the core (1) in a clockwise or counterclockwise direction.
3. A mica tape wrapped high temperature resistant cable as claimed in claim 1, wherein, The second mica wrapping layer (4) is wrapped in the opposite direction to the first mica wrapping layer (2).
4. A mica tape wrapped high temperature resistant cable as claimed in claim 1, wherein, The wrapping overlap rate of the first mica wrapping layer (2) and the second mica wrapping layer (4) is greater than 15%.
5. A mica tape wrapped high temperature resistant cable as claimed in claim 1, wherein, The mica tape adopts a fluorophlogopite structure.
6. A mica tape wrapped high temperature resistant cable as claimed in claim 1, wherein, The first glass fiber woven layer (3) and the second glass fiber woven layer (5) have the same structure, and the glass fibers adopt alkali-free glass fibers or high-silica sand.