Flexible conductor ribbon shielding cloth wire

Abstract

The utility model relates to a flexible conductor ribbon shielding cotton covered wire, which comprises a plurality of conductors, an insulating film, an insulating protective layer and shielding layers, the plurality of conductors are uniformly distributed in the insulating film, the upper end and the lower end of the insulating film are respectively and fixedly connected with the shielding layers, and the outer sides of the shielding layers are fixedly connected with the insulating protective layer. The flexible power transmission cable provided by the utility model has the advantages of high voltage-resistant grade, low production cost, relatively low price and high temperature-resistant grade; the power distribution cable is resistant to vibration, deflection and high temperature ranging from-200 DEG C to + 300 DEG C, provides working current for various instruments and meters, life electric appliances and power systems, and is simple and reasonable in structure, good in use performance, low in manufacturing cost and suitable for application and popularization.

Description

Technical Field

[0001] The utility model relates to an electric wire, in particular to a flexible conductor thin-strip shielding cloth electric wire. Background Art

[0002] Current status of flexible wiring application technology:

[0003] 1. At present, flexible wires and cables are mainly used for drag chain cables, elevator cables, etc., and are produced using flexible rubber, polyolefin and other elastomeric materials. These traditional processes have high production costs and slow production speeds, resulting in high product prices.

[0004] 2. The temperature resistance of existing common flexible wires is limited by the materials, especially the temperature resistance of the base materials, and the high temperature resistance is generally lower than 125°C.

[0005] 3. The flame retardancy of existing common flexible wires is limited by the flame retardant properties of materials, especially base materials, and the improvement of flame retardant properties depends on flame retardants.

[0006] To this end, we propose a flexible conductor thin tape shielded cloth wire. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a flexible conductor thin-strip shielded cloth wire, which solves the defects described in the background technology that occur during the use of the existing flexible cloth wire.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions: a flexible conductor thin-strip shielded cloth wire, comprising a conductor, an insulating film, an insulating protective layer and a shielding layer, wherein a plurality of conductors are provided, and the plurality of conductors are evenly distributed in the insulating film, and the upper and lower ends of the insulating film are respectively fixedly connected with the shielding layer, and the outer side of the shielding layer is fixedly connected with the insulating protective layer.

[0009] Based on the above solution, the conductor is made of annealed ultra-flexible copper strip.

[0010] Based on the above solution, the insulating film is an insulating varnish made by mixing spherical silicon dioxide and polyimide.

[0011] Based on the above solution, the insulating protective layer is made of flexible silicone rubber.

[0012] Based on the above solution, the shielding layer is an aluminum film shielding layer.

[0013] Compared with the prior art, the utility model has the following beneficial effects: a flexible conductor thin strip shielding cloth wire has the following beneficial effects:

[0014] 1. The product has good flexibility, can be produced in large lengths and can be bent and installed in a narrow space;

[0015] 2. Relatively low production cost;

[0016] 3. The product has good structural stability. The insulating film adopts spherical silica and polyimide composite film, which overcomes the defect of low fracture productivity after ordinary polyimide film formation;

[0017] 4. It can still work normally in specific environments such as high temperature, mechanical shock, mechanical vibration, polar ultra-low temperature, etc.

[0018] 5. Good acid and oil resistance. During the production, storage and transportation process, any liquid erosion will not affect the application function of the product;

[0019] 6. Outstanding low temperature resistance, it can have the necessary mechanical strength and toughness at low temperature of -200℃ and above, and will not crack due to low temperature embrittlement;

[0020] 7. This product is halogen-free, non-toxic and non-corrosive;

[0021] 8. The flexible silicone rubber insulating protective layer outside the spherical silica and polyimide insulating composite film is a protective measure taken to address the poor alkali resistance of the polyimide material. It can isolate the spherical silica and polyimide insulating composite film from alkaline substances. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of a flexible conductor thin-strip shielded cloth wire of the utility model.

[0023] The numbers in the figure are: 1-conductor, 2-insulating film, 3-insulating protective layer, 4-shielding layer. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] Reference Figure 1 It can be seen that: a flexible conductor thin-strip shielded cloth wire includes a conductor 1, an insulating film 2, an insulating protective layer 3 and a shielding layer 4, the conductor 1 is provided with multiple, and the multiple conductors 1 are evenly distributed in the insulating film 2, the upper and lower ends of the insulating film 2 are respectively fixedly connected with the shielding layer 4, and the outer side of the shielding layer 4 is fixedly connected with the insulating protective layer 3.

[0027] The conductor 1 is made of annealed ultra-flexible copper strip, and the surface has good smoothness and good corrosion resistance. The insulating film 2 is an insulating varnish made of a mixture of spherical silica and polyimide. The dielectric constant of the insulating varnish made of spherical silica and polyimide insulation is generally less than 3.0, which is significantly better than the dielectric constant of ordinary polyimide materials; the insulating protective layer 3 is made of flexible silicone rubber, and the flexible silicone rubber film has good electrical insulation performance and resistance to mechanical damage, and plays multiple roles of electrical insulation and protection; the shielding layer 4 is an aluminum film shielding layer, and the aluminum film has a good shielding effect on blocking the propagation of weak electromagnetic signals.

[0028] The principle and advantages of the utility model: A flexible conductor thin-strip shielded cloth wire adopts a new structure:

[0029] 1. Conductor 1 is made of annealed ultra-soft thin copper tape. The surface of conductor 1 has good finish and good corrosion resistance. After the annealed ultra-soft thin copper tape is cut according to the cross-sectional area required for conductivity, the edge of the copper tape must be processed to prevent burrs and copper powder from adhering to the surface of the copper tape;

[0030] 2. The insulating film 2 on the outside of the conductor 1 is made of an insulating varnish mixed with spherical silica and polyimide. When the thin strip conductor 1 is dipped in liquid insulating varnish, the insulating varnish can be evenly coated on the surface of the thin strip conductor 1. After the conductor 1 dipped in polyimide insulating varnish leaves the dipping equipment, a flexible silicone rubber insulating protective layer 3 needs to be immediately attached from the upper and lower sides; ordinary polyimide insulating varnish that does not use spherical silica hybridization has very good dielectric properties, and its dielectric constant is 3.4. Although it is larger than the dielectric constant of 2.3 of polyethylene material, it is significantly better than the dielectric constant of 4 to 6 of traditional polyvinyl chloride insulating material. The dielectric constant of spherical silica and polyimide insulating composite film is generally less than 3.0, which is significantly better than the dielectric constant of ordinary polyimide material; the elongation at break of ordinary polyimide material is generally not less than 25%, but it is significantly lower than the elongation at break requirement of not less than 100% for wire and cable insulating materials. The minimum elongation at break of the polyimide composite film hybridized with spherical silica is not less than 60%. When the content of nano-scale silica in the spherical silica and polyimide insulation composite film reaches 20%, its elongation at break is not less than 80%, which can meet the normal working requirements of wires and cables. Polyimide has high radiation resistance, and its film has a strength retention rate of 90% after 5×109rad fast electron irradiation. Polyimide is a self-extinguishing polymer with low smoke rate and good flame retardant properties. In the event of a fire, this product The product does not extend the flame and will not produce high-density smoke that affects the escape of personnel; the spherical silica and polyimide insulation composite film is environmentally friendly and non-toxic, and has been used in tableware and medical instruments; this product adopts the mature polyimide insulation paint coating process, and multiple qualified conductors are dipped in the spherical silica and polyimide composite insulation paint together, and the thermosetting spherical silica and polyimide insulation composite film is obtained through a high-temperature curing process. The spherical silica and polyimide insulation composite film is used as an insulation protective layer 3, and the performance is stable and reliable;

[0031] 3. The flexible silicone rubber film is used as the insulating protective layer 3. Through the traction of the traction roller, multiple annealed ultra-thin copper tape conductors 1 coated with polyimide insulating paint on the same plane are tightly bonded together on the upper and lower surfaces. The aluminum film shielding layer 4 attached to the inner wall of the flexible silicone rubber insulating protective layer 3 cannot contact the annealed ultra-flexible thin copper tape conductor 1. Therefore, the spacing between the upper and lower sets of preheating rollers attached to the flexible silicone rubber insulating protective layer 3 is determined by the thickness of the product; the flexible silicone rubber film has good electrical insulation performance and mechanical damage resistance, and plays multiple roles in electrical insulation and protection;

[0032] 4. An aluminum film shielding layer 4 is attached to one side of the flexible silicone rubber insulating protective layer 3, which plays a role in shielding and blocking the mutual interference of electromagnetic signals inside and outside the wire. The flexible silicone rubber insulating protective layer 3 with aluminum film is a pre-prepared raw material, and the aluminum film has a good shielding effect on blocking the propagation of weak electromagnetic signals;

[0033] 5. The semi-finished product with the flexible silicone rubber insulating protective layer 3 is passed through an electrically heated roller to heat and cure the polyimide insulating varnish. The temperature of the preheated roller is sufficient to cure the polyimide insulating varnish. At the same time, through the extrusion of the roller, the excess spherical silica and polyimide mixed insulating varnish is filled into the gaps between the annealed ultra-flexible thin copper strip conductors 1 to form an insulator between the conductors 1.

[0034] 6. Use a roller-type cutting tool with adjustable spacing to continuously cut the edge of the product, and simultaneously remove the excess flexible silicone rubber film and polyimide insulating paint. It is quick and convenient. The roller-type cutting tool with adjustable spacing continuously cuts the edge of the product, and at the same time uses the cutting pressure between the upper and lower knives to tightly connect the upper and lower flexible silicone rubber insulating protective layers 3 together;

[0035] 7. This product makes full use of the excellent heat resistance and flame retardant properties of silicone rubber and polyimide, making the product a wiring product with excellent heat resistance and aging resistance, and outstanding flame retardant and safety performance.

[0036] Technical parameters of this product:

[0037] Power cord test voltage:

[0038] Working voltage: 300 / 300V test voltage 1500V;

[0039] Working voltage: 300 / 500V, test voltage 2000V;

[0040] Working voltage: 450 / 750V test voltage 2500V;

[0041] Temperature range: mobile working conditions -100℃~300℃;

[0042] Fixed working conditions -200℃~300℃;

[0043] Bending radius: minimum cable diameter under mobile working conditions × 10;

[0044] Minimum cable diameter under fixed working conditions × 6;

[0045] Torsion range: max.±450° / m;

[0046] Bending times: 500,000 times;

[0047] Core insulation resistance at room temperature: >5000MΩ.km.

[0048] This product is ultra-thin and ultra-flexible, with fast production speed and low production cost. It is suitable for current transmission and signal transmission of small-power electrical appliances and weak-current signal communication equipment. This product has excellent anti-torsion, anti-bending, anti-tearing, tensile and elongation properties. Since the material used has excellent temperature resistance, it can be used normally for a long time in the temperature range of -200℃~300℃, and can be used for a short time in the temperature range of -200℃~-260℃ and 300℃~400℃. The product is environmentally friendly and non-toxic, has good flexibility, especially outstanding temperature resistance, so it can be used in high temperature requirements, environmental protection and non-toxicity requirements, Application in radiation-resistant places; this product makes up for the defect of existing unsheathed cloth wire products without protection, and also makes up for the deficiency of sheathed wire products that the insulation sheath is divided into different production processes, which has high cost and long cycle; it can be used in military products, electronic instruments, aerospace, high-temperature resistant equipment and other fields; it can be applied to special equipment that uses electromagnetic signal transmission to realize equipment operation monitoring, especially for working equipment in ultra-high temperature and ultra-low temperature environments. It has irreplaceable uses; it can also be used in industrial electronic systems, data transmission systems and other equipment. This product has a simple and reasonable structure, good performance, low production cost, and is suitable for popularization and use.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible conductor thin-strip shielded wire, comprising a conductor (1), an insulating film (2), an insulating protective layer (3) and a shielding layer (4), characterized in that: The conductor (1) is provided in plurality, and the plurality of conductors (1) are evenly distributed in the insulating film (2); the upper and lower ends of the insulating film (2) are respectively fixedly connected to a shielding layer (4); and the outer side of the shielding layer (4) is fixedly connected to an insulating protective layer (3).

2. A flexible conductor thin-strip shielded cloth wire according to claim 1, characterized in that: The conductor (1) is made of annealed ultra-flexible copper strip.

3. The flexible conductor thin tape shielded cloth wire according to claim 1, characterized in that: The insulating protective layer (3) is made of flexible silicone rubber.

4. The flexible conductor thin-strip shielded cloth wire according to claim 1, characterized in that: The shielding layer (4) is an aluminum film shielding layer.

Images