CN212113286U - Tensile lapped wire - Google Patents

Abstract

The utility model discloses a tensile is around package, include the insulating layer and set up in the intraformational conductor of insulating layer, its characterized in that still includes and centers on tensile layer, the signal shielding layer that the conductive layer set up, the insulating layer includes first insulating layer and second insulating layer, the first insulating layer cladding is in the outside of tensile layer, and it adopts polyimide composite film to form through thermal treatment after the package around the package, the cladding of second insulating layer is outside at the first insulating layer, and it adopts polytetrafluoroethylene composite tape to form through thermal treatment after the package, first insulating layer and second insulating layer are equipped with the bond line around package opposite direction and the two, the conductor includes the silver-plated copper wire, the tensile layer includes a plurality of aramid fibers, and it evenly arranges the insulating layer is inboard, the signal shielding layer is the metallic braid. The manufactured tensile lapping wire has high tensile and compressive strength, good conductivity, strong shielding capability and long service life.

Description

Tensile lapped wire

Technical Field

The utility model relates to a cable processing production field specifically is a tensile is around package.

Background

The wire and cable is a wire product used for transmitting electric (magnetic) energy, information and realizing electromagnetic energy conversion. According to the regulations of the International Electrotechnical Commission (IEC), a high-temperature-resistant cable refers to a wire and cable that can normally operate at a temperature of 180 ℃ or higher, and the long-term operating environment temperature of a general high-temperature-resistant wire and cable is about 65 to 200 ℃. The wire and cable used in aerospace generally need to resist 350 ℃ high temperature, have certain anti-interference capability and tensile and compressive strength, and simultaneously have the characteristic of light weight.

At present, the conductor structure used by the common aerospace wire and cable is formed by twisting 7 strands of monofilaments and 19 strands of monofilaments with thicker monofilament outer diameters, the used insulation and sheath materials are more in variety, the extrusion material which can be better controlled by the process is only cross-linked ethylene-tetrafluoroethylene copolymer, and the raw material has higher hardness due to the requirements of high-temperature material molecular structure characteristics, process processing specificity and space environment performance. From the characteristics of product structures and used materials, the common aerospace wire and cable is high in hardness, large in bending radius and high in rigidity, and the requirement of an aerospace spacecraft solar drive plate on fatigue bending and swinging of the cable is difficult to meet. In the occasions with small bending radius and high bending frequency, the conductors are frequently subjected to shearing stress and the rigid rebound stress of the insulating sheath, so that the conductors are broken, the connection control function fails, the operational reliability of the solar drive board equipment connected with the cable also has risks, potential quality hazards are brought to the safety and the reliability of subsequent complete machines, the service life of the complete machine is finally influenced, and even great loss is caused.

The traditional domestic lapped insulated wire and cable is a single polyimide tape, but not a composite tape or a single polytetrafluoroethylene tape, has the temperature resistance of only 250 ℃, can crack through bending or vibration, cannot form a compact insulated whole, has prominent lapped overlapping gaps, has obvious bamboo joints, unsmooth insulating surface and certain influence on mechanical performance and service life, and therefore, the domestic high-end field depends on import and has high cost. In order to reduce the cost, a large number of fluoroplastic insulated wires are still adopted in some occasions, the insulated extruded wires are thick, large in size and heavy in weight, cracking and aging are easy to occur in insulation after the fluoroplastic insulated wires are subjected to external radiation, and the safety and reliability are poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tensile is around package to solve current space flight cable and can not resist high temperature, tensile strength is poor, the unable problem that satisfies the aerospace requirement of performance.

In order to achieve the above object, the utility model provides a following technical scheme: a tensile lapped wire sequentially comprises a conductor layer, a tensile layer, an insulating layer, a signal shielding layer and a glass fiber layer from inside to outside;

the conductor layer comprises silver-plated copper wires or other metal conductors.

The tensile layer is arranged on the outer side of the conductor layer and comprises a plurality of aramid fibers arranged in parallel to the conductor layer; the type of aramid fiber silk is selected according to the diameter of the conductor layer, and the aramid fiber silk and the conductor are arranged in parallel, so that the aramid fiber silk bears most of pulling force when the conductor layer is pulled, and the conductor is protected from being thinned and damaged.

The insulating layer comprises a polyimide layer and a polytetrafluoroethylene layer, the polyimide layer is wrapped on the outer sides of the conductor layer and the tensile layer, and the polytetrafluoroethylene layer is wrapped on the outer side of the polyimide layer; the polytetrafluoroethylene film has high temperature resistance, can reach 260 ℃, is softer than a polyimide composite film, can wrap aramid fibers around a conductor tightly, and cannot be leaked and scattered. The overlapping wrapping structure of the polyimide composite film and the polytetrafluoroethylene film can enable the cable to be used in an environment of 350 ℃, and meets the requirements of data acquisition, analog signal transmission, parameter control, power transmission and the like.

The glass silk layer weave in the insulating layer outside, its outside parcel has the heat-resistant layer, and the glass silk is woven and is being outer around the wire, weaves stable in structure, can guarantee cable inner structure stable non-deformable, has high temperature resistant simultaneously, corrosion-resistant characteristic, and the heat-resistant layer can guarantee inside cable normal communication for scribbling high temperature resistant paint outside the glass silk layer, under the high temperature environment.

As a further improvement of the above technical solution:

the signal shielding layer comprises a plurality of layers of metal braided layers, including silver-plated copper wire single-wire braided layers and nickel-iron alloy wire braided layers, wherein the diameter of each silver-plated copper wire single wire is 0.05mm, the braiding density is greater than 80%, and the greater the braiding density, the higher the probability of blocking electromagnetic influence is. The metal shielding effect is better than the nonmetal shielding effect, and the nonmetal has the electrostatic shielding effect but the shielding is not large. The nonmetal can generate polarization charges, and the polarization charges partially offset the external electric field but cannot be completely offset; the metal surface generates induced charges, and the induced charges can completely counteract the influence of an external electric field.

The lapping overlapping rate of the polytetrafluoroethylene layer and the polyimide layer is more than 60%. The polytetrafluoroethylene layer and the polyimide layer can be for many times around the package, and the more around the package number of piles, high temperature resistant characteristic is better. The higher the influence of the overlapping rate, the higher the degree of overlap of the two, and the better the heat resistance. And (3) wrapping and simultaneously performing 350 ℃ high temperature on the polytetrafluoroethylene layer and the polyimide layer to enable the polytetrafluoroethylene layer and the polyimide layer to be combined more tightly. The insulating property and the high temperature resistance are improved.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a tensile adopts polytetrafluoroethylene composite tape around the package conductive layer outside around the package, adopts polytetrafluoroethylene film to wind the package in the polyimide layer outside, adopts the high temperature to combine, and the two combines closely, and its insulation system is simple, reasonable in design, and the temperature performance is good, and high fire-retardant adopts the bilayer around the package structure, and cable surface is smooth and level, has excellent wear-resisting, cut-resistant performance to mechanical strength is big, has fine anti environmental stress fracture, has very strong resistant force to vertically cutting into with the friction.

Evenly arranged aramid fiber silk has improved the tensile strength of cable as the tensile layer of cable, and aramid fiber silk is a novel high-tech synthetic fiber, has super high strength, high-modulus and high temperature resistant, acid and alkali resistant, light in weight's fine performance, and its intensity is 6 times of steel wire, and the modulus is 3 times of steel wire or glass fiber, and toughness is 2 times of steel wire, and weight only is about 1/5 of steel wire, under 560 ℃ of temperature, does not decompose, does not melt. Good insulating property and ageing resistance, improved property of the space cable and prolonged service life.

The glass fiber layer is woven by glass, the weaving density is close to 100%, the higher the weaving density is, the better the temperature resistance is, and the temperature resistance is further enhanced by coating with high-temperature resistant paint liquid after weaving.

The signal shielding layer is woven by adopting silver-plated copper wires as a metal shield, the electromagnetic field influence of more than 99 percent can be intercepted by more than 80 percent of weaving density, and the safety factor of spaceflight is obviously improved.

Generally speaking the utility model discloses a to cable inner structure's design, design a tensile pressure can the reinforce, and shielding ability is strong, and high temperature resistance can be strong, and insulating ability is strong, satisfies the space flight and uses.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.

In the figure: 1. an insulating layer; 2. a conductor layer; 3. a tensile layer; 4. a signal shielding layer; 5. a glass fiber layer; 11. a polyimide layer; 12. a polytetrafluoroethylene layer; 51. and a heat-resistant layer.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1 and fig. 2, the tensile lapped wire of the present embodiment sequentially includes a conductor layer 2, a tensile layer 3, an insulating layer 1, a signal shielding layer 4, and a glass fiber layer 5 from inside to outside;

the conductor layer 2 includes conductive wires 22;

the tensile layer 3 is arranged on the outer side of the conductor layer 2 and comprises a plurality of aramid fibers arranged in parallel to the conductor layer 2;

the insulating layer 1 comprises a polyimide layer 11 wrapped on the outer side of the conductor layer 2 and a polytetrafluoroethylene layer 12 wrapped on the outer side of the polyimide layer 11, and the polyimide layer 11 and the polytetrafluoroethylene layer 12 are oppositely wrapped and are alternately wrapped;

the glass fiber layer 5 is woven outside the signal shielding layer 4, and heat-resistant paint is coated outside the glass fiber layer 5 to form a heat-resistant layer 51.

Specifically, the signal shielding layer 4 includes a plurality of metal braid layers. The metal braided layer comprises a silver-plated copper wire monofilament braided layer and a nickel-iron alloy wire braided layer, wherein the diameter of the silver-plated copper wire monofilament is 0.05mm, and the braiding density is 80%.

Specifically, the polytetrafluoroethylene layer 11 and the polyimide layer 12 are respectively wrapped by one layer, and the overlapping rate is 60%.

The package line of this embodiment chooses 4 root 1000D aramid fiber silks for use as tensile layer 3, and insulating layer 1 is inseparable rather than the laminating, and production is simple, and the cost is lower, and low-cost design one kind can be able to bear or endure 350 ℃ high temperature, and tensile strength is high simultaneously, shields effectual package line.

Example 2

As shown in fig. 1 and fig. 2, the tensile lapped wire of the present embodiment sequentially includes a conductor layer 2, a tensile layer 3, an insulating layer 1, a signal shielding layer 4, and a glass fiber layer 5 from inside to outside;

the conductor layer 2 includes conductive wires 22;

the tensile layer 3 is arranged on the outer side of the conductor layer 2 and comprises a plurality of aramid fibers arranged in parallel to the conductor layer 2;

the insulating layer 1 comprises a polyimide layer 11 wrapped on the outer side of the conductor layer 2 and a polytetrafluoroethylene layer 12 wrapped on the outer side of the polyimide layer 11, and the polyimide layer 11 and the polytetrafluoroethylene layer 12 are oppositely wrapped and are alternately wrapped;

the glass fiber layer 5 is woven outside the signal shielding layer 4. The glass fiber layer 5 is coated with a heat-resistant paint as a heat-resistant layer 51.

Specifically, the signal shielding layer 4 includes a plurality of metal braid layers. The metal braided layer comprises a silver-plated copper wire monofilament braided layer and a nickel-iron alloy wire braided layer, wherein the diameter of the silver-plated copper wire monofilament is 0.05mm, and the braiding density is more than 85%.

Specifically, the polytetrafluoroethylene layer 12 and the polyimide layer 11 are respectively wrapped by two layers, and the overlapping rate is 65%.

The tensile of this embodiment is around the package, adopts 8 400D aramid fibers evenly to arrange in the insulating layer outside, and its tensile strength degree obviously improves, and silver-plated copper wire weaves density simultaneously and is 85%, and shielding effect is fabulous, is fit for using in extremely complicated and abominable environment such as aerospace, long service life.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (4)

1. The utility model provides a tensile is around package, its characterized in that: the anti-theft alarm cable sequentially comprises a conductor layer (2), a tensile layer (3), an insulating layer (1), a signal shielding layer (4) and a glass fiber layer (5) from inside to outside;

the tensile layer (3) is arranged on the outer side of the conductor layer (2) and comprises a plurality of aramid filaments arranged in parallel to the conductor layer (2);

the insulating layer (1) comprises a polyimide layer (11) wrapped on the outer side of the conductor layer (2) and a polytetrafluoroethylene layer (12) wrapped on the outer side of the polyimide layer (11), and the polyimide layer (11) and the polytetrafluoroethylene layer (12) are opposite in wrapping direction and are wrapped crosswise;

the glass fiber layer (5) is woven on the outer side of the insulating layer (1), and a heat-resistant layer (51) is wrapped on the outer side of the glass fiber layer.

2. The tensile lapped wire of claim 1, wherein: the signal shielding layer (4) comprises a plurality of metal braided layers.

3. The tensile lapped wire of claim 2, wherein: the metal braided layer comprises a silver-plated copper wire monofilament braided layer and a nickel-iron alloy wire braided layer, wherein the diameter of each silver-plated copper wire monofilament is 0.05mm, and the braiding density is greater than 80%.

4. The tensile lapped wire of claim 3, wherein: the lapping overlapping rate of the polytetrafluoroethylene layer (12) and the polyimide layer (11) is more than 60%.

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