High-temperature-resistant multi-layer polyimide shielding cable

Abstract

The utility model provides a high-temperature-resistant multi-layer polyimide shielding cable, which comprises a thin film burning and covering layer, a plurality of wires, at least one insulating filling body, an insulating fiber burning and covering layer, a shielding layer and a protective layer, wherein the plurality of wires and the at least one insulating filling body are arranged in the thin film burning and covering layer; the wire comprises an insulating fiber braid layer, a plurality of conductors arranged in the insulating fiber braid layer, and a plurality of paint bottom layers arranged on the surface of each conductor. According to the high-temperature-resistant multi-layer polyimide shielding cable, different forms of polyimide are compounded, so that the high-temperature-resistant, radiation-resistant and easy-to-degrade properties of the shielding cable are enhanced; the requirements on production equipment are low, and the cost is low; meanwhile, a plurality of current loops with insulating layers (insulating fiber braid layers) are arranged in the same cable shell, so that current can flow at the same time, the resistance and voltage are reduced, the power transmission efficiency is improved, meanwhile, heat insulation is carried out on the outside at high temperature through multiple layers of insulation, and the fire risk of the cable is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shielded cable, especially to a high temperature resistant multilayer polyimide shielded cable. BACKGROUND

[0002] With the development of industry, more and more equipment needs to operate in high temperature environment, but ordinary cable cannot ensure stable transmission of power and signal under high temperature, and at the same time, cable may be affected by temperature rise and generate electromagnetic interference, resulting in signal distortion or loss. For application requirements in specific environment or special working conditions, in addition to high strength and good flexibility, the requirements of cable high temperature resistance, anti-interference, corrosion resistance and other performances are also significantly enhanced. These requirements aim to ensure that the cable can still maintain stable working state in harsh environment, improve the reliability and safety of the whole system.

[0003] Therefore, it is necessary to design a high temperature resistant multilayer polyimide shielded cable to enhance the mechanical strength of the cable, effectively prevent safety hazards such as current leakage and short circuit, improve the conductivity, and reduce the risk of power interruption caused by cable failure. SUMMARY

[0004] The utility model aims at providing a high temperature resistant multilayer polyimide shielded cable to solve the problems in the background art.

[0005] The utility model provides a high temperature resistant multilayer polyimide shielded cable, including film burning bag layer, a plurality of wires and at least one insulating filling body arranged in the film burning bag layer, insulating fiber burning bag layer wrapped outside the insulating filling body, shielding layer wrapped outside the insulating fiber burning bag layer, and protective layer wrapped outside the shielding layer, the wire includes insulating fiber braided layer, a plurality of conductors arranged in the insulating fiber braided layer, and a plurality of paint primer layers arranged on the surface of each conductor.

[0006] Further, a plurality of the conductors are concentrically twisted and connected.

[0007] Further, the conductor is a nickel-plated copper conductor.

[0008] Further, the paint primer layer is a first polyimide paint layer.

[0009] Further, the cross-sectional area of a plurality of the wires is the same.

[0010] Further, the insulating filling body is a polyimide fiber bundle.

[0011] Further, the film burning bag layer is a polyimide film layer.

[0012] Further, the insulating fiber braid layer is a polyimide fiber layer.

[0013] Further, the diameter of the conductor is 0.1-1.0 mm.

[0014] Further, the surface of the insulating fiber braid layer is immersed and baked with a second polyimide paint layer.

[0015] Compared with the prior art, the beneficial effects of the utility model include:

[0016] 1. The utility model discloses a polyimide-based multilayer shielding composite insulated cable which is produced by the polyimide of different forms, and is produced by reasonable structure design and process optimization, and the high-temperature resistance, radiation resistance and easy degradation performance of the shielding cable are enhanced.

[0017] 2. The utility model discloses simple and easy, and adopts the fiber material as the main insulation and protection material of the cable, and the fiber material is light in weight, good in flexibility, strong in processability, low in requirement to the production equipment and low in cost.

[0018] 3. The utility model discloses a plurality of current loops with insulating layers (insulating fiber braid layers) are arranged in the same cable shell, so that the current can flow simultaneously, thereby reducing the resistance and voltage and improving the power transmission efficiency, and meanwhile, the multilayer insulation can insulate heat from the outside, thereby effectively reducing the risk of cable fire. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a sectional structure schematic view of the high-temperature-resistant multilayer polyimide shielding cable in the first embodiment of the utility model.

[0020] Figure 2 It is a physical map of the high-temperature-resistant multilayer polyimide shielding cable in the first embodiment of the utility model.

[0021] MAIN ELEMENT SYMBOL EXPLANATION

[0022] Thin film burn-in layer 10 Conductor 22 Insulating fiber burn-in layer 40 Conductor 20 Paint base layer 23 Shielding layer 50 Insulating fiber braiding layer 21 Insulating filler body 30 Protective layer 60

[0023] The following specific embodiments will further illustrate the utility model in combination with the above drawings. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. The drawings show several embodiments of the utility model. However, the utility model can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein the terms "vertical", "horizontal", "left", "right" and similar terms are used for explanation purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0027] Referring to Figure 1 and Figure 2 The application provides a kind of high temperature resistant multilayer polyimide shielded cable, including film burning bag layer 10, multiple wires 20 and at least one insulating filler 30 being arranged in the film burning bag layer 10, insulating fiber burning bag layer 40 being wrapped in the insulating filler 30, shielding layer 50 being wrapped in the insulating fiber burning bag layer 40, and protective layer 60 being wrapped in the shielding layer 50 outside, the wire 20 includes insulating fiber braiding layer 21, multiple conductors 22 being arranged in the insulating fiber braiding layer 21, and multiple lacquer primer layers 23 being arranged on the surface of each conductor 22.

[0028] The above-mentioned high temperature resistant multilayer polyimide shielded cable arranges multiple current loops with insulating layer (insulating fiber braiding layer 21) in the same cable shell (protective layer 60), so that current can flow simultaneously, thereby reducing resistance and voltage, improving power transmission efficiency, and at the same time, the multilayer insulation is heat-insulated from the outside under high temperature, effectively reducing the risk of cable fire.

[0029] In the specific implementation process, shielding layer 50 is made of high-conductivity material, which can effectively shield external electromagnetic interference and ensure the signal transmission quality of the cable. For example, copper wire or nickel wire is woven.

[0030] In an embodiment of the application, multiple conductors 22 are concentrically twisted and connected. The flexibility and mechanical strength of the wire 20 can be improved, and the risk of cable breakage during use can be reduced.

[0031] In an embodiment of the application, the conductor 22 is a nickel-plated copper conductor. By using nickel-copper alloy as the conductor 22, the conductor 22 has good electrical conductivity and corrosion resistance.

[0032] In an embodiment of the utility model, the paint base layer 23 is a first polyimide paint layer. The insulation performance and high temperature resistance of the conductor 22 can be further enhanced.

[0033] In an embodiment of the utility model, the cross-sectional area of the plurality of conductors 20 is the same. The plurality of conductors 20 can be balanced in heat dissipation.

[0034] In an embodiment of the utility model, the insulating filler 30 is a polyimide fiber bundle. The insulating filler 30 has good insulation performance and mechanical strength, can effectively fill the gaps between the conductors 20, and improve the overall mechanical strength of the cable.

[0035] In an embodiment of the utility model, the film burning bag layer 10 is a polyimide film layer. The insulation performance and high temperature resistance of the cable can be further enhanced.

[0036] In an embodiment of the utility model, the insulating fiber braid layer 21 is a polyimide fiber layer, which has excellent high temperature resistance and insulation performance.

[0037] In an embodiment of the utility model, the diameter of the conductor 22 is 0.1-1.0 mm. Different current transmission requirements can be met, and the flexibility and mechanical strength of the cable are ensured.

[0038] In an embodiment of the utility model, the surface of the insulating fiber braid layer 21 is immersed and baked with a second polyimide paint layer. The insulation performance and high temperature resistance of the insulating fiber braid layer 21 can be further enhanced.

[0039] In an embodiment of the utility model, the protective layer 60 is made of polyimide fiber, which is a polyimide fiber braid layer immersed and baked with polyimide paint. The protective layer 60 can be a multi-layer or single-layer braid. Specifically, the outer diameter of the cable is increased by 5 mm, and the braid thickness of the protective layer 60 is increased by 0.5 mm.

[0040] In the specific implementation process, the density of the insulating fiber braid layer 21 is not less than 80%, and the density of the protective layer 60 is not less than 95%.

[0041] Compared with the prior art, the utility model has the beneficial effects including:

[0042] 1. The utility model adopts different forms of polyimide composite, and produces a polyimide-based multi-layer shielding composite insulated cable through reasonable structure design and process optimization, so that the high temperature resistance, radiation resistance and easy degradation performance of the shielding cable are enhanced.

[0043] 2. The utility model is simple and easy to operate, uses fiber material as the main insulation and protection material of the cable, has light weight and good flexibility, has strong processability, has low requirement for production equipment, and has low cost.

[0044] 3、The utility model discloses a plurality of current loops with insulating layer (insulating fiber braided layer 21) are arranged in the same cable shell, make current flow simultaneously, thereby reduce resistance and voltage, improve power transmission efficiency, simultaneously, multilayer insulation carries out heat insulation under the high temperature of outside world, effectively reduces cable fire risk.

[0045] The following tests are carried out on the examples to verify the technical performance level of the actual product, and the test results are as follows:

[0046]

[0047] Among them, example 1 uses 0.224mm specification nickel-plated wire 20, and example 2 uses 0.315mm specification nickel-plated wire 20.

[0048] From the above experimental results, it can be seen that the high-temperature-resistant multilayer polyimide shielding cable has good radiation resistance, high-temperature resistance, resistance reduction and voltage reduction effects.

[0049] The above-described examples only express several embodiments of the utility model, and the description is more specific and detailed, but it should not be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A high temperature resistant multilayer polyimide shielded electrical cable characterized in that, The cable comprises a film jacket, a plurality of conductors and at least one insulating filler arranged in the film jacket, an insulating fiber jacket arranged outside the insulating filler, a shielding layer arranged outside the insulating fiber jacket, and a protective layer arranged outside the shielding layer, the conductors comprising an insulating fiber braid layer, a plurality of conductors arranged in the insulating fiber braid layer, and a plurality of paint primer layers arranged on the surface of each of the conductors.

2. The high temperature resistant multilayer polyimide shielded cable of claim 1, wherein, The plurality of conductors are concentrically twisted and connected.

3. The high temperature resistant multilayer polyimide shielded cable of claim 1, wherein, The conductors are nickel-plated copper conductors.

4. The high temperature resistant multi-layer polyimide shielded cable of claim 1, wherein, The paint primer layers are first polyimide paint layers.

5. The high temperature resistant multilayer polyimide shielded cable of claim 1, wherein, The cross-sectional areas of the plurality of conductors are the same.

6. The high temperature resistant multi-layer polyimide shielded cable of claim 1, wherein, The insulating filler is a polyimide fiber bundle.

7. The high temperature resistant multi-layer polyimide shielded cable of claim 1, wherein, The film jacket is a polyimide film layer.

8. The high temperature resistant multi-layer polyimide shielded cable of claim 1, wherein, The insulating fiber braid layer is a polyimide fiber layer.

9. The high temperature resistant multi-layer polyimide shielded cable of claim 1, wherein, The diameter of the conductors is 0.1-1.0 mm.

10. The high temperature resistant multi-layer polyimide shielded cable of claim 1, wherein, The surface of the insulating fiber braid layer is immersed and baked with a second polyimide paint layer.

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