A pre-coated conductor thin tape shielded cloth wire with good temperature resistance

Abstract

The utility model discloses a pre-coated conductor thin-strip shielded cloth electric wire with good temperature resistance, comprising a pre-coated conductor thin-strip shielded cloth electric wire cable body, wherein the pre-coated conductor thin-strip shielded cloth electric wire cable body comprises an annealed ultra-flexible copper tape conductor, an inner pre-coated silicone film insulation, an outer spherical silica-polyimide insulation composite film, an aluminum film shielding layer and a flexible silicone rubber film protective layer, wherein the inner pre-coated silicone film insulation is fixedly coated on the outer side of the annealed ultra-flexible copper tape conductor, and the inner pre-coated silicone film insulation is coated on the inner side of the outer spherical silica-polyimide insulation composite film; the pre-coated conductor thin-strip shielded cloth electric wire cable body can still work normally and has good acid resistance and oil resistance in specific environments such as high temperature, mechanical impact, mechanical vibration, polar ultra-low temperature, and the like, and the application function of the product is not affected by the erosion of any liquid substance encountered during production, storage and transportation.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature-resistant cables, in particular to a pre-coated conductor thin-strip shielded cloth wire with good temperature resistance. Background Art

[0002] Cable is a general term for optical cables, electrical cables and other items. Cables have many uses, mainly used for control installation, connecting equipment, transmitting electricity and other multiple functions. They are common and indispensable in daily life. Since cables are charged, installation requires special care. High temperature resistant wires and cables are cables that can normally transmit signals or electrical energy at high temperatures.

[0003] The cables in the existing technology currently on the market have the following problems: 1. Currently, flexible wires and cables are mainly used for drag chain cables, elevator cables, etc., and are produced using elastomeric materials such as flexible rubber and polyolefin. These traditional processes have high production costs and slow production speeds, resulting in high product prices. 2. The temperature resistance of existing common flexible wires is limited by the temperature resistance of materials, especially the base materials, and the high temperature resistance is generally lower than 125°C. 3. The flame retardancy of existing common flexible wires is limited by the flame retardant properties of materials, especially the base materials, and the improvement of flame retardant properties depends on flame retardants. Focusing on the current status of technology, based on this, we propose a pre-coated conductor thin strip shielded cloth wire with good temperature resistance. Utility Model Content

[0004] The utility model aims to provide a pre-coated conductor thin-strip shielded cloth wire with good temperature resistance, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pre-coated conductor thin-strip shielded cloth wire with good temperature resistance, comprising a pre-coated conductor thin-strip shielded cloth wire cable body, the pre-coated conductor thin-strip shielded cloth wire cable body comprising an annealed super-flexible copper tape conductor, an inner layer of pre-coated silicone film insulation, an outer layer of spherical silica-polyimide insulation composite film, an aluminum film shielding layer and a flexible silicone rubber film protective layer, the inner layer of pre-coated silicone film insulation is fixedly coated on the outer side of the annealed super-flexible copper tape conductor, the inner layer of pre-coated silicone film insulation is coated on the inner side of the outer layer of spherical silica-polyimide insulation composite film, the outer layer of spherical silica-polyimide insulation composite film is coated on the inner side of the aluminum film shielding layer, and the aluminum film shielding layer is fixedly adhered to the inner side of the flexible silicone rubber film protective layer.

[0006] Preferably, the annealed ultra-flexible copper tape conductors are linearly and evenly arranged and distributed on the inner side of the outer spherical silicon dioxide-polyimide insulating composite film.

[0007] Preferably, the surface of the annealed super-flexible copper strip conductor is smooth and clean, and the inner layer pre-coated silicone film insulation is pre-coated and wrapped around the outside of the annealed super-flexible copper strip conductor.

[0008] Preferably, the outer spherical silica-polyimide insulating composite film is uniformly coated on the outer side of the annealed ultra-flexible copper tape conductor and the inner pre-coated silicone film insulation by a rapid infiltration coating process.

[0009] Preferably, the flexible silicone rubber film protective layer and the aluminum film shielding layer are laminated to the outside of the outer spherical silica-polyimide insulating composite film by extrusion using heated constant pressure double rollers.

[0010] Preferably, both ends of the pre-coated conductor thin tape shielded cloth cable body are curved surfaces.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The product has good flexibility, can be produced in large lengths and can be bent and installed in a small space, and the production cost is relatively low;

[0013] 2. The product has good structural stability. The spherical silica-polyimide composite film used overcomes the defect of low elongation at break of ordinary polyimide after film formation;

[0014] 3. It can still work normally and has good acid and oil resistance in specific environments such as high temperature, mechanical shock, mechanical vibration, polar ultra-low temperature, and the product's application function will not be affected by any liquid erosion during production, storage and transportation;

[0015] 4. It has outstanding low temperature resistance, and can have the necessary mechanical strength and toughness at low temperature of -200℃ and above, and will not crack due to low temperature embrittlement. This product is halogen-free, non-toxic and non-corrosive.

[0016] 5. The flexible silicone rubber film outside the spherical silica-polyimide insulating composite film is a protective measure taken to address the poor alkali resistance of the polyimide material. It isolates the spherical silica-polyimide insulating composite film from alkaline substances. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of the cable of the utility model.

[0018] In the figure: 1. Pre-coated conductor thin tape shielding cloth cable body; 101. Annealed ultra-flexible copper tape conductor; 102. Inner pre-coated silicone film insulation; 103. Outer spherical silica-polyimide insulation composite film; 104. Aluminum film shielding layer; 105. Flexible silicone rubber film protective layer. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 The utility model provides a technical solution: a pre-coated conductor thin-strip shielded cloth wire with good temperature resistance, comprising a pre-coated conductor thin-strip shielded cloth wire cable body 1, the pre-coated conductor thin-strip shielded cloth wire cable body 1 comprises an annealed super-flexible copper tape conductor 101, an inner pre-coated silicone film insulation 102, an outer spherical silica-polyimide insulation composite film 103, an aluminum film shielding layer 104 and a flexible silicone rubber film protective layer 105, the inner pre-coated silicone film insulation 102 is fixedly coated on the outer side of the annealed super-flexible copper tape conductor 101, the inner pre-coated silicone film insulation 102 is coated on the inner side of the outer spherical silica-polyimide insulation composite film 103, the outer spherical silica-polyimide insulation composite film 103 is coated on the inner side of the aluminum film shielding layer 104, and the aluminum film shielding layer 104 is fixedly attached to the inner side of the flexible silicone rubber film protective layer 105.

[0021] The working principle of the above technical solution is as follows: during production, when the annealed ultra-flexible copper tape conductor 101 with the inner pre-coated silicone film insulation 102 is continuously and rapidly passed through the polyimide insulating varnish, the polyimide insulating varnish is evenly coated on the surface of the annealed ultra-flexible copper tape conductor 101. Polyimide has high radiation resistance, and its film is 5×10 9The strength retention rate after rad fast electron irradiation is 90%. Polyimide is a self-extinguishing polymer with low smoke rate and good flame retardant properties. In the event of a fire, this solution will not burn and will not produce high-density smoke that affects the escape of personnel. The outer spherical silica-polyimide insulating composite film 103 is environmentally friendly and non-toxic, and has been used in tableware and medical instruments. This solution adopts a mature polyimide insulating paint coating process, and multiple qualified conductors are dipped in spherical silica-polyimide composite insulating paint together. After a high-temperature curing process, a thermosetting outer spherical silica-polyimide insulating composite film 103 is obtained. The outer spherical silica-polyimide insulating composite film 103 is the insulating layer of this solution. The flexible silicone rubber film is pulled by the traction roller as a protective layer, and then the upper and lower surfaces of multiple annealed ultra-flexible copper strip conductors 101 coated with polyimide insulating paint on the same plane are tightly bonded together to form a flexible silicone rubber film protective layer 105. The flexible silicone rubber film has good electrical insulation performance and mechanical damage resistance, and plays a multiple role in electrical insulation and protection. The flexible silicone rubber film protective layer 105 is attached to one side with an aluminum film shielding layer 104, which plays a role in shielding and blocking the mutual interference of electromagnetic signals inside and outside the wire. The flexible silicone rubber film with aluminum film is a pre-prepared raw material. The aluminum film has a good shielding effect on blocking the propagation of weak electromagnetic signals. When the semi-finished product with the flexible silicone rubber film protective layer 105 passes through the electric heating roller, the polyimide insulating varnish is heated and cured, and at the same time, through the extrusion of the roller, the excess polyimide insulating varnish is filled into the gap between the annealed ultra-flexible copper strip conductors 101 to form an insulator between the copper strips. Then, the roller-type cutting tool with adjustable spacing continuously cuts the edge of the product, and the excess flexible silicone rubber film and polyimide insulating varnish are removed simultaneously. This product makes full use of the excellent temperature resistance and flame retardant properties of silicone rubber and polyimide, making the product a wiring product with excellent temperature resistance and aging resistance, and outstanding flame retardant safety performance.

[0022] In another embodiment, Figure 1 As shown, the annealed ultra-flexible copper tape conductors 101 are linearly and evenly arranged and distributed on the inner side of the outer spherical silicon dioxide-polyimide insulating composite film 103 .

[0023] A plurality of uniformly arranged and distributed annealed ultra-flexible copper tape conductors 101 can increase the conductivity and tensile strength of the pre-coated conductor thin tape shielding cloth cable body 1 and increase the overall structural strength.

[0024] In another embodiment, Figure 1 As shown, the surface of the annealed super-flexible copper tape conductor 101 is smooth and clean, and the inner layer pre-coated silicone film insulation 102 is pre-coated and wrapped around the outer side of the annealed super-flexible copper tape conductor 101.

[0025] The conductor is an annealed ultra-flexible copper tape conductor 101, and the conductor surface has good finish. Before the annealed ultra-flexible copper tape conductor 101 is divided as needed, the inner pre-coated silicone film insulation 102 with excellent insulation performance is attached to the upper and lower surfaces of the copper tape by a hot compress process. The outer insulating layer is an outer spherical silicon dioxide-polyimide insulating composite film 103.

[0026] In another embodiment, Figure 1 As shown, the outer spherical silicon dioxide-polyimide insulation composite film 103 is uniformly coated on the outer side of the annealed ultra-flexible copper tape conductor 101 and the inner pre-coated silicone film insulation 102 by using a rapid immersion coating process.

[0027] The conductor insulation layer adopts spherical silica-polyimide insulating varnish. When the thin strip conductor passes through the polyimide insulating varnish continuously and quickly, the polyimide insulating varnish is evenly coated on the surface of the thin strip conductor. Ordinary polyimide insulating varnish without spherical silica hybridization has good dielectric properties, and its dielectric constant is 3.4. Although it is larger than the dielectric constant of polyethylene material 2.3, it is significantly better than the dielectric constant of 4 to 6 of traditional polyvinyl chloride insulation materials. The dielectric constant of spherical silica-polyimide insulation composite film is generally less than 3.0, which is significantly better than the dielectric constant of ordinary polyimide materials. The elongation at break of ordinary polyimide materials 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 insulation 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-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.

[0028] In another embodiment, Figure 1 As shown, the flexible silicone rubber film protective layer 105 and the aluminum film shielding layer 104 are extruded and laminated on the outer side of the outer spherical silica-polyimide insulating composite film 103 by using heated constant pressure double rollers.

[0029] The flexible silicone rubber film is pulled as a protective layer by the traction roller, and then the upper and lower surfaces of multiple annealed ultra-flexible copper strip conductors 101 coated with polyimide insulating varnish on the same plane are tightly bonded together. The semi-finished product with the flexible silicone rubber film is passed through an electric heating roller to heat and cure the polyimide insulating varnish. At the same time, through the extrusion of the roller, the excess polyimide insulating varnish is filled into the gaps between the annealed ultra-flexible copper strip conductors 101 to form an insulator between the copper strips. An aluminum film shielding layer 104 is attached to one side of the flexible silicone rubber film protective layer 105, which plays a role in shielding and blocking the mutual interference of electromagnetic signals inside and outside the wires. The aluminum film shielding layer 104 is preset on the inner side of the flexible silicone rubber film protective layer 105.

[0030] In another embodiment, Figure 1 As shown, both ends of the pre-coated conductor tape shielding cloth cable body 1 are curved surfaces.

[0031] The actual measurement parameters of the cable in this solution are as follows: power cord core test voltage: working voltage: 300 / 300V, test voltage 1500V. Working voltage: 300 / 500V, test voltage 2000V, working voltage: 450 / 750V, test voltage 2500V. Temperature range: mobile working conditions -100℃~300℃, fixed working conditions -200℃~300℃. Bending radius: mobile working conditions, minimum cable diameter ×10, fixed working conditions minimum cable diameter ×6. Torsion range: max. ±450° / m. Bending times: 500000 times. Core insulation resistance at room temperature: >5000MΩ.km. Provide the electrical industry with a flexible power transmission cable with high voltage resistance, low production cost, relatively low price and high temperature resistance. This solution is vibration-resistant, flex-resistant and high-temperature-resistant -200-+300℃ power distribution cable. It provides working current for various instruments, household appliances and power systems. It can be used in machinery and equipment manufacturing, aerospace engines, nuclear power generator sets, ship power units and high-voltage power distribution of spacecraft power systems.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-coated conductor thin tape shielded cloth wire with good temperature resistance, comprising a pre-coated conductor thin tape shielded cloth wire cable body (1), characterized in that: The pre-coated conductor thin-strip shielded cloth cable body (1) comprises an annealed ultra-flexible copper tape conductor (101), an inner pre-coated silicone film insulation (102), an outer spherical silica-polyimide insulation composite film (103), an aluminum film shielding layer (104) and a flexible silicone rubber film protective layer (105), wherein the inner pre-coated silicone film insulation (102) is fixedly coated on the outer side of the annealed ultra-flexible copper tape conductor (101), the inner pre-coated silicone film insulation (102) is coated on the inner side of the outer spherical silica-polyimide insulation composite film (103), the outer spherical silica-polyimide insulation composite film (103) is coated on the inner side of the aluminum film shielding layer (104), and the aluminum film shielding layer (104) is fixedly attached to the inner side of the flexible silicone rubber film protective layer (105).

2. The pre-coated conductor thin tape shielded cloth wire with good temperature resistance according to claim 1, characterized in that: The annealed ultra-flexible copper tape conductors (101) are linearly and evenly arranged and distributed on the inner side of the outer spherical silicon dioxide-polyimide insulating composite film (103).

3. The pre-coated conductor thin tape shielded cloth wire with good temperature resistance according to claim 1, characterized in that: The surface of the annealed ultra-flexible copper strip conductor (101) is smooth and clean, and the inner layer pre-coated silicone film insulation (102) is pre-coated and wrapped around the outside of the annealed ultra-flexible copper strip conductor (101).

4. The pre-coated conductor thin tape shielded cloth wire with good temperature resistance according to claim 1, characterized in that: The outer spherical silicon dioxide-polyimide insulation composite film (103) is uniformly coated on the outer sides of the annealed ultra-flexible copper tape conductor (101) and the inner pre-coated silicone film insulation (102) by using a rapid infiltration coating process.

5. The pre-coated conductor thin tape shielded cloth wire with good temperature resistance according to claim 1, characterized in that: The flexible silicone rubber film protective layer (105) and the aluminum film shielding layer (104) are laminated to the outside of the outer spherical silicon dioxide-polyimide insulating composite film (103) by extrusion using heated constant pressure double rollers.

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