CN209312462U - High-low temperature resistant flat cotton covered wire - Google Patents

Abstract

The utility model relates to a kind of high-low temperature resistant flat cotton covered wires, including conductor (1), insulating layer (2) and sheath, the outer extruded insulation layer of the conductor is as core wire, split conductor parallel lay-up extrudes inner sheath (3), middle layer (4) and oversheath (5) in successively outer after flat stranding, middle layer is ultra high molecular weight polyethylene fiber, insulating layer is the FEP fluoroplastics that tolerable temperature range is -60 DEG C~+200 DEG C, and inner sheath and oversheath are the silicon rubber that tolerable temperature range is -60 DEG C~+200 DEG C.The utility model improves the tolerable high temperature performance of electric wire, prolongs the service life, and reduces core wire outer diameter and oversheath thickness, saves electric wire installation space.

Description

High-low temperature resistant flat cotton covered wire

Technical field

The utility model relates to a kind of cotton covered wire, in particular to a kind of high-low temperature resistant flat cotton covered wire.

Background technique

Currently, common cotton covered wire is mainly formed by extruding a layer insulating outside copper conductor in the market, or two, three Add one layer of sheath outside the core wire of root extruded insulation layer again.The operating temperature of these cotton covered wires -15 DEG C to+70 DEG C or -15 DEG C to+ Between 125 DEG C, although relevant technical standard requirement can be met, used in rugged surrounding temperature, the insulation of electric wire Skin is easy cracking and causes wire short-circuiting.

The insulating layer of electric wire generallys use the materials such as polyvinyl chloride material (PVC) or crosslinked polyethylene material (XLPE).PVC is resistance to Hot bad, dielectric coefficient can change because of temperature and frequency height, and electrical characteristic is more difficult to control, and PVC pyrolytic Chlorine generation is had, is suitble to use under low temperature environment.The heat-resisting adhesion performance of XLPE is poor, be easy to cause stick to each other between electric wire, It seriously can lead to the mechanical electric performance that insulation broken skin forms short circuit, and is relatively hard to keep excellent at high temperature.

Summary of the invention

The purpose of this utility model is that a kind of high-low temperature resistant flat cotton covered wire, the cotton covered wire increase in silicone rubber jacket layer Add ultra high molecular weight polyethylene fiber as middle layer, insulating layer uses FEP fluoroplastics, realizes -60 DEG C~+200 DEG C tolerable Operating temperature range, and reduce core wire outer diameter and jacket thickness.

The utility model is realized in this way:

A kind of high-low temperature resistant flat cotton covered wire, including conductor, insulating layer and sheath, the outer extruded insulation layer conduct of the conductor Core wire, split conductor parallel lay-up extrude inner sheath, middle layer and oversheath in successively outer after flat stranding, and middle layer is superelevation Molecular weight polyethylene fiber.

The insulating layer is the FEP fluoroplastics that tolerable temperature range is -60 DEG C~+200 DEG C.

The inner sheath and oversheath are the silicon rubber that tolerable temperature range is -60 DEG C~+200 DEG C.

The utility model compared with prior art, has the following beneficial effects: by increasing by high specific strength, high ratio modulus Ultra high molecular weight polyethylene fiber made of middle layer overcome the defect of the tear resistance difference of silicone rubber jacket, and reduce Jacket thickness；Thickness of insulating layer 50% is reduced using FEP fluoroplastics, reduces core wire outer diameter, saves installation space；Split conductor is parallel Arrangement is in flat composition cable, and whole electric wire is made to have good high-low temperature resistant characteristic, bendability and mechanical performance.

The utility model adds ultra high molecular weight polyethylene fiber middle layer in silicone rubber jacket layer, realizes tolerable height Temperature range is big, has improved flexibility and tear resistance, reduces core wire outer diameter and oversheath thickness and can be resistant to height Temperature improves service performance, saves electric wire installation space, the building building more severe suitable for use environment.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of high-low temperature resistant flat cotton covered wire of the utility model；

In figure, 1 conductor, 2 insulating layers, 3 inner sheaths, 4 middle layers, 5 oversheaths.

Specific embodiment

The utility model is described in further detail in the following with reference to the drawings and specific embodiments.

Referring to Fig. 1, a kind of high-low temperature resistant flat cotton covered wire, including conductor 1, insulating layer 2 and sheath, conductor 1 extrude absolutely outside Edge layer 2 is used as core wire, and split conductor parallel lay-up extrudes inner sheath 3, middle layer 4 and oversheath 5 in successively outer after flat stranding, Inner sheath 3 and oversheath 5 are that tolerable temperature range is -60 DEG C~+200 DEG C silicon rubber.Silicon rubber itself has good Flexibility has preferable heat resistance than General Purpose Rubber, and for a long time under ultraviolet light and other weather conditions, physical property variation is micro- It is small, but since the tear resistance of silicon rubber is poor, it is supra polymer that material is increased in inner sheath 3 and oversheath 5 The characteristics of middle layer 4 of weight polyethylene fiber, the high specific strength and high ratio modulus of ultra high molecular weight polyethylene fiber is silicon rubber Restrictive coating improves tear resistance and reduces jacket thickness.

Insulating layer 2 is the FEP fluoroplastics that tolerable temperature range is -60 DEG C~+200 DEG C, is compared to PVC and XLPE material Material, FEP fluoroplastics have better thermal stability, adapt to+150 DEG C~+250 DEG C of hot environment, and in same pressure resistance Wire insulation thickness can reduce 50% under grade.

Conductor 1 is single 1.78mm tinned copper wire.

In addition, FEP fluoroplastics surface smoother, it is not easy to sheath generate it is viscous take phenomenon, when extrude sheath, can not Using separation layers such as talcum powder, the dust in production process is reduced.

The utility model utilizes the high and low temperature resistance of silicon rubber and the high ratio of flexibility, ultra high molecular weight polyethylene fiber The preferable pressure-resistant performance of intensity and high ratio modulus characteristic and FEP fluoroplastics, improves the resistant of high or low temperature of electric wire, has good Bendability and mechanical performance, extending wire service life, and reduce core wire outer diameter and oversheath thickness, save electric wire Installation space.

The above is only the preferred embodiments of the present utility model only, is not intended to limit the protection scope of the utility model, Therefore, any modification, equivalent substitution, improvement and etc. made within the spirit and principle of the present invention, should be included in Within the protection scope of the utility model.

Claims (1)

1. a kind of high-low temperature resistant flat cotton covered wire, including conductor (1), insulating layer (2) and sheath, it is characterised in that: the conductor (1) outer extruded insulation layer (2) is used as core wire, split conductor parallel lay-up be in after flat stranding successively it is outer extrude inner sheath (3), in Interbed (4) and oversheath (5), middle layer (4) are ultra high molecular weight polyethylene fiber；The insulating layer (2) is tolerable temperature The FEP fluoroplastics that range is -60 DEG C~+200 DEG C；The inner sheath (3) and oversheath (5) are that tolerable temperature range is -60 DEG C~+200 DEG C of silicon rubber.