CN201576487U

CN201576487U - Coaxial cable

Info

Publication number: CN201576487U
Application number: CN201020026162XU
Authority: CN
Inventors: 陈伟乐; 肖翠玉; 陈占山
Original assignee: ZHUHAI YUXUN COAXIAL CABLE CO Ltd
Current assignee: ZHUHAI YUXUN COAXIAL CABLE CO Ltd
Priority date: 2010-01-06
Filing date: 2010-01-06
Publication date: 2010-09-08
Anticipated expiration: 2020-01-06

Abstract

The utility model discloses a coaxial cable, which has good electric performance, long service life and low cost. The utility model comprises an inner conductor (1), an insulation layer (2) and a screen layer (3); wherein the inner conductor (11) is arranged inside the insulation layer (12); the screen layer (3) is arranged on the periphery of the insulation layer (12); and the periphery of the screen layer (3) is provided with two or more layers of outer sheaths (4). The layers of sheaths are arranged to overcome the defect of radial perforation of the sheath owing to particles and impurities in the sheath material, thus guaranteeing and improving the electric performance and transmission performance of the cable wire. The utility model is applied to wired transmission network communication field.

Description

A kind of coaxial cable

Technical field

The utility model relates to a kind of coaxial cable.

Background technology

Development along with society, people step into electronic age gradually, electronic product is widely used, the electronic equipment of various functions is seen everywhere, thereby the information between the electronic product facility in the various systems, network, image transmission are also of a great variety with connecting line, use amount constantly rises, its standard coaxial cable is one of connecting line the most commonly used, coaxial wire is as the important carrier of message transmission, in order to guarantee the high-quality transmission of various information, also more and more higher to the requirement of coaxial wire.The outermost layer of coaxial wire is a sheath, the sheath materials by resin and according to sheath performance technological requirement and price factor the various interpolation materials that must add form, these additive particle size are uneven, exist but also have residue on sieve, at production links such as batch mixing granulations, the user processes in the process of sheath and also has the possibility of sneaking into impurity, all can cause the defective effect electric property of sheath than particle, residue on sieve, the impurity of coarsegrain.Wherein perforation radially or partly connect the critical defect that defective is a sheath has a strong impact on the electric property and the physical property such as proof voltage intensity, insulation resistance, leakage current, protection against the tide of sheath.And its sheath of existing coaxial cable is to be integral type sheath by an extrusion molding of appointed thickness by the sheath extruder on a secondary mould, the impurity that exists in the protective cover material of this integral type sheath, particle may appear at the surface of sheath, trace then can appear drawing in the process of extruding, if bigger particle, also make sheath cause half perforation diametrically easily, or even it is whole radially by particle, impurity connects, sheath above-mentioned defective occurs and then has a strong impact on the sheath quality, cause sheath proof voltage intensity low, insulation resistance is low, leakage current is big, humidity resistance is poor, qualification rate is low, easily cause fracture during wiring, the use poor stability, life-span is shorter, all-in-one-piece sheath will alleviate above-mentioned defective, can only increase jacket thickness, but the integral thickness of sheath needs conformance with standard, and increase thickness has improved production cost undoubtedly as far as possible.

The utility model content

Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, provides that a kind of electric property is good, long service life, lower-cost coaxial cable.

The technical scheme that the utility model adopted is: the utility model comprises inner wire, insulating barrier, screen, described inner wire is arranged at the inside of described insulating barrier, described screen is arranged on the periphery of described insulating barrier, described screen outer periphery is equipped with two-layer or two-layer above sheath, described sheath is in actual production, can be divided into multilayer as required, take all factors into consideration factors such as the electric property of sheath and production cost, can described sheath optimization be set to the internal layer sheath and outer protective sleeve two-layer, described internal layer sheath is arranged on described screen periphery, and described outer protective sleeve is arranged on the periphery of described internal layer sheath.

Described screen is the aluminum pipe outer conductor.

Described screen comprises aluminum-plastic composite membrane band, braided outer conductor, and described aluminum-plastic composite membrane band is wrapped in described insulating barrier periphery, and described braided outer conductor is wrapped in described aluminum-plastic composite membrane band periphery.

The beneficial effects of the utility model are: in the utility model, be equipped with oversheath more than two-layer or two-layer in the outer periphery of described screen, can avoid sheath when producing because the particle that exists in the protective cover material, residue on sieve, impurity etc. and cause sheath occur to connect or half defective that connects, producing, when extruding sheath, even the particle in the protective cover material, impurity etc. can't be avoided, but since the utility model in sheath be two-layer for or two-layer more than, so particle in the sheath, impurity can not cause the perforation phenomenon of sheath, thereby effectively improve the electric property and the transmission performance of coaxial cable, effectively improve product percent of pass, thereby reduce cost, and prolong the useful life of product; Compare with existing common cable sheath, sheath proof voltage intensity of the present utility model can improve more than 10%; The jacket insulation resistance value improves more than 20%, and the sheath leakage current can reduce by 10%, and humidity resistance is good, has improved the stability of product, thereby guarantees security of products and reliability; The outward appearance of extruding sheath is good, and is smooth complete, particularly can obtain comparatively satisfied product appearance to this kind of employing jacket structure such as the stranded type of cable core, band type, Weaving type and processes process.

Description of drawings

Fig. 1 is the utility model embodiment one structural representation;

Fig. 2 is the utility model embodiment two structural representations.

Embodiment

Embodiment one:

As shown in Figure 1, the utility model comprises inner wire 1, insulating barrier 2, screen 3, described inner wire 1 is arranged at the inside of described insulating barrier 2, described screen 3 is arranged on the periphery of described insulating barrier 2, described screen 3 is the aluminum pipe outer conductor, described screen 3 outer periphery are equipped with two-layer or two-layer above sheath 4, described sheath 4 is in actual production, can be divided into multilayer as required, take all factors into consideration factors such as the electric property of sheath 4 and production cost, can be described sheath 4 optimize and be set to internal layer sheath 41 and outer protective sleeve 42 is two-layer, described internal layer sheath 41 is arranged on described screen 3 peripheries, described outer protective sleeve 42 is arranged on the periphery of described internal layer sheath 41, warp is to raw material, technology difficulty, the analysis of factors such as processing cost, the processing technology that the internal layer sheath 41 of described sheath 4 and outer protective sleeve 42 adopt a secondary clearing to extrude, if the connectivity ratio of defects that the existing sheath of once extruding integral thickness causes because of acrobatics is 2%, then in the utility model, it is 0.04% that one secondary clearing is extruded the perforation ratio of defects that sheath 4 that internal layer sheath 41 and outer protective sleeve 42 form causes because of impurity, thereby reduce the diametric perforation defective of sheath 4 significantly, reduce sheath 4 faults of construction, improve the electric property and the transmission performance of product; It is more that one secondary clearing is extruded the technical process mode of coaxial cable sheath, extrude as a layering moulding of two extruder double moldses or two extruder particular manufacturing craft, and the installation of two extruders has multiple mode, wherein extrudes to good at a secondary particular manufacturing craft with two extruders; The internal layer sheath 41 that one secondary clearing is extruded, outer protective sleeve 42 should bond well, the slit existence does not have, the thickness of described internal layer sheath 41 and outer protective sleeve 42 respectively accounts for half of sheath 4 thickness, the gross thickness of described sheath 4 should meet the product standard requirement of corresponding specification coaxial cable, described internal layer sheath 41, outer protective sleeve 42 can be the protective cover material of the same color of same grade, also can be the protective cover material of the different colours of same grade.

Embodiment two:

As shown in Figure 2, in the present embodiment, described screen 3 comprises aluminum-plastic composite membrane band 31, braided outer conductor 32, described aluminum-plastic composite membrane band 31 is wrapped in described insulating barrier 2 peripheries, described braided outer conductor 32 is wrapped in described aluminum-plastic composite membrane band 31 peripheries, and other features of present embodiment are consistent with embodiment one.

The utility model can be widely used in the wire transmission field of network communication.

Claims

1. coaxial cable, comprise inner wire (1), insulating barrier (2), screen (3), described inner wire (1) is arranged at the inside of described insulating barrier (2), described screen (3) is arranged on the periphery of described insulating barrier (2), it is characterized in that: described screen (3) outer periphery is equipped with two-layer or two-layer above sheath (4).

2. a kind of coaxial cable according to claim 1, it is characterized in that: described sheath (4) comprises internal layer sheath (41), outer protective sleeve (42), described internal layer sheath (41) is arranged on described screen (3) periphery, and described outer protective sleeve (42) is arranged on the periphery of described internal layer sheath (41).

3. a kind of coaxial cable according to claim 1 and 2 is characterized in that: described screen (3) is the aluminum pipe outer conductor.

4. a kind of coaxial cable according to claim 1 and 2, it is characterized in that: described screen (3) comprises aluminum-plastic composite membrane band (31), braided outer conductor (32), described aluminum-plastic composite membrane band (31) is wrapped in described insulating barrier (2) periphery, and described braided outer conductor (32) is wrapped in described aluminum-plastic composite membrane band (31) periphery.