CN203760107U - Hydrolysis resistance high temperature aviation cable - Google Patents

Abstract

The utility model discloses a hydrolysis-resistant high-temperature aviation cable, which comprises a cable body. The cable body sequentially includes a cable core, an isolation layer, a total shielding layer and a sheath layer from the inside to the outside. The conductive core wire of the layer is twisted, and the composite insulating layer is wrapped with the cable core shielding layer. The beneficial effects of the utility model are: the weight of the wire is significantly reduced, and the hydrolysis resistance of the wire is improved. The inner layer adopts polyimide composite insulation as the cable core, which can realize weight reduction. It is light in weight and widely used in the aviation field. The cross-linked ethylene-tetrafluoroethylene is used as the sheath to effectively prevent the polyimide composite insulating cable core of the inner layer from being hydrolyzed, and the cable can be used for the connection of internal instruments and instruments of aviation aircraft that are in contact with rainwater or sea surface. Wide range of applications.

Description

Hydrolysis resistant high temperature aviation cable

technical field

The utility model relates to a cable, in particular to a hydrolysis-resistant high-temperature aviation cable.

Background technique

The aviation aircraft connection has gone through the development stage of ordinary plastic, cross-linked ethylene-tetrafluoroethylene, polyimide composite film and other cables, and exerted their respective greatest advantages. - Cables require a balance of requirements in all aspects to adapt to the harsh environment requirements of aviation vehicles.

At present, the most advanced in the world is the cross-linked ethylene-tetrafluoroethylene high temperature resistant round copper wire shielded cable. This kind of cable has better hydrolysis resistance and the weight meets the requirements of aviation. However, compared with polyimide composite film cables, the weight is lower. And arc resistance is poor. Although polyimide has improved hydrolysis resistance after being compounded with polytetrafluoroethylene, it is very dangerous to use the internal instruments and instrumentation wiring of aviation aircraft that are usually exposed to rain or sea.

Therefore, in order to solve the above problems, a new technical solution is provided.

Utility model content

The utility model provides a hydrolysis-resistant high-temperature aviation cable.

The technical scheme that the utility model adopts is:

The hydrolysis-resistant high-temperature aviation cable includes a cable body, and the cable body includes a cable core, an isolation layer, a total shielding layer, and a sheath layer from the inside to the outside, and the cable core is covered with a composite insulation layer by one or more The conductive core wires are stranded, and the composite insulating layer is wrapped with a cable core shielding layer.

The conductive core wire is composed of single or multiple twisted core wires of silver-plated, tin-plated, nickel-plated or alloy copper materials.

The composite insulating layer includes an insulating layer I and an insulating layer II sequentially from the inside to the outside, and the insulating layer I and the insulating layer II are wrapped together.

The insulating layer I is polyimide double-sided composite polytetrafluoroethylene tape insulating tape, and the insulating layer II is polytetrafluoroethylene raw material tape.

The cable core shielding layer is polyimide single-sided composite aluminum foil metal strip.

The isolation layer is a semi-directional polytetrafluoroethylene film longitudinal wrapping tape.

The overall shielding layer is braided by silver-plated, tin-plated, nickel-plated or alloy copper materials.

The sheath layer is extruded cross-linked ethylene-tetrafluoroethylene.

The beneficial effects of the utility model are: the weight of the wire is significantly reduced, and the hydrolysis resistance of the wire is improved. The inner layer adopts polyimide composite insulation as the cable core, which can realize weight reduction, and is widely used in the aviation field due to its light weight. The cross-linked ethylene-tetrafluoroethylene is used as the sheath to effectively prevent the polyimide composite insulating cable core of the inner layer from being hydrolyzed, and the cable can be used for the connection of internal instruments and instruments of aviation aircraft that are in contact with rainwater or sea surface. Wide range of applications.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Fig. 1 is the structural representation of the utility model.

Among them: 1. Conductive core wire, 2. Insulation layer Ⅰ, 3. Insulation layer Ⅱ, 4. Cable core shielding layer, 5. Isolation layer, 6. Overall shielding layer, 7. Sheath layer.

Detailed ways

In order to deepen the understanding of the utility model, the utility model will be further described below in conjunction with the embodiments and accompanying drawings. The embodiment is only used to explain the utility model, and does not constitute a limitation to the protection scope of the utility model.

As shown in Figure 1, the hydrolysis-resistant high-temperature aviation cable of the present invention includes a cable body, and the cable body sequentially includes a cable core, an isolation layer 5, a total shielding layer 6 and a sheath layer 7 from the inside to the outside, and the isolation layer 5 is half Oriented polytetrafluoroethylene film longitudinal wrapping tape is formed by wrapping on the same machine as the metal braiding machine. The sheath layer 7 is extruded cross-linked ethylene-tetrafluoroethylene and formed by irradiation. The total shielding layer 6 is plated Braided by silver, tin-plated, nickel-plated or alloy copper materials, the cable core is twisted by single or multiple conductive core wires 1 covered with a composite insulation layer, and the conductive core wire 1 is twisted by single or multiple twisted The core wire is composed of silver-plated, tin-plated, nickel-plated or alloy copper materials. The composite insulating layer includes insulating layer I2 and insulating layer II3 from the inside to the outside. The insulating layer I2 and the insulating layer II3 are wrapped around, and the insulating layer I2 Polyimide double-sided composite polytetrafluoroethylene tape insulation tape, insulation layer Ⅱ3 is polytetrafluoroethylene raw material tape, the composite insulation layer is wrapped with a cable core shielding layer 4, and the cable core shielding layer 4 is polyimide Single-sided composite aluminum foil metal strip, the aluminum foil side is on the inside and the polyimide side is on the outside when wrapping.

The beneficial effects of the utility model are: the weight of the wire is significantly reduced, and the hydrolysis resistance of the wire is improved. The inner layer adopts polyimide composite insulation as the cable core, which can realize weight reduction, and is widely used in the aviation field due to its light weight. The cross-linked ethylene-tetrafluoroethylene is used as the sheath to effectively prevent the polyimide composite insulating cable core of the inner layer from being hydrolyzed, and the cable can be used for the connection of internal instruments and instruments of aviation aircraft that are in contact with rainwater or sea surface. Wide range of applications.

The above are only preferred embodiments of the utility model, and are not intended to limit the utility model in any other form, and any modifications or equivalent changes made according to the technical essence of the utility model still belong to the utility model. Scope of protection claimed.

Claims (8)

1. hydrolysis type high temperature Aviation cable, it is characterized in that: comprise cable body, described cable body from inside to outside comprises cable core, separator, total screen and restrictive coating successively, described cable core is by single or many stranded the forming of conductive core line that are coated with composite insulation layer, and described composite insulation layer outer wrap has cable core screen.

2. hydrolysis type high temperature Aviation cable according to claim 1, is characterized in that: described conductive core line consists of heart yearn single or many stranded silver-plated, zinc-plated, nickel plating or alloyed copper material.

3. hydrolysis type high temperature Aviation cable according to claim 1, is characterized in that: described composite insulation layer comprises insulating barrier I and insulating barrier II from inside to outside successively, described insulating barrier I and insulating barrier II is wrapped forms.

4. hydrolysis type high temperature Aviation cable according to claim 3, is characterized in that: described insulating barrier I is the two-sided ptfe composite tape insulation of polyimides band, and described insulating barrier II is polytetrafluoroethylraw raw material band.

5. hydrolysis type high temperature Aviation cable according to claim 1, is characterized in that: described cable core screen is polyimides one side clad aluminum foil metal tape.

6. hydrolysis type high temperature Aviation cable according to claim 1, is characterized in that: the vertical band of polytetrafluoroethylene film that described separator is semi-directional.

7. hydrolysis type high temperature Aviation cable according to claim 1, is characterized in that: described total screen forms by silver-plated, zinc-plated, nickel plating or the braiding of alloyed copper material.

8. hydrolysis type high temperature Aviation cable according to claim 1, is characterized in that: described restrictive coating is extrusion type cross-linked ethylene-tetrafluoroethene.