Composite flat cable

Abstract

The utility model discloses a composite flat cable, which comprises a cable core and a sheath used for wrapping the cable core, the cable core comprises a plurality of wire cores and a plurality of optical units, the wire cores are arranged side by side in the cable core, the optical units are arranged in front of every two wire cores, and the horizontal heights of the wire cores and the optical units are consistent; the structure of the wire core is provided with a cooling pipe, a conductor, an insulating layer and a water-blocking tape from inside to outside in sequence; the sheath is sequentially provided with a metal sheath and an outer protection layer from inside to outside. The cable is reasonable in structural design, and has the following beneficial effects: the cooling pipe is arranged in the wire core, and the temperature of the conductor is reduced by using high heat conduction performance and high specific heat capacity of water; meanwhile, the wire core adopts a soft structure, and the insulating layer adopts flame-retardant cold-resistant butyronitrile polyvinyl chloride for insulation, so that good flexibility of the cable is ensured; and the outer protection layer is made of PTFE (Polytetrafluoroethylene) plastic, so that the flexibility of the flat cable is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a composite flat cable. Background Art

[0002] As modernization construction improves day by day, people's living conditions are getting better and better, and the demand for materials is also getting higher and higher, which in turn leads to the emergence of various types of buildings and facilities with more complete functions and the diversification and complexity of equipment and devices. Wires and cables are one of the most important parts of electrical systems and equipment. They are the blood vessels and media for power transmission and signal transmission. The needs of modernization construction have placed higher and higher requirements on the functions and performance of wire and cable products.

[0003] The purpose and structure of wires and cables currently used in various places are relatively simple. Although they can meet the requirements of daily use, they will lose their original functions once encountering emergencies or sudden changes in the use environment, and may even become a source of failure and danger, making people's personal and property safety not guaranteed. Utility Model Content

[0004] The utility model aims to provide a composite flat cable, which has excellent high temperature and fire resistance and good flexibility, thereby solving the problem that the cable is prone to failure in high temperature scenarios.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides a composite flat cable, including a cable core and a sheath for wrapping the cable core, the cable core includes a plurality of wire cores and a plurality of optical units, the wire cores are arranged side by side in the cable core, and optical units are arranged between two wire cores, and the horizontal heights of the wire cores and the optical units are consistent; the structure of the wire core is provided with a cooling tube, a conductor, an insulating layer, and a water-blocking tape in sequence from the inside to the outside; the sheath is provided with a metal sheath and an outer protective layer in sequence from the inside to the outside.

[0006] Furthermore, the cable core also includes a filler, which is arranged in the gap between the wire core and the optical unit in the cable core. The filler is a ceramic polyolefin fireproof filler, and the filler is layered filling, and the thickness of each layer is 3.0mm-4.5mm.

[0007] Furthermore, the cross-sectional shape of the cable core is two upper and lower parallel straight lines of equal length at the same horizontal position, and the left and right ends of the two straight lines are connected to a semicircle.

[0008] Furthermore, the cross-sectional shape of the wire core is circular, the number of the wire cores is 3, and the number of the optical units is 2; the cable also includes a sensor, and the sensor is connected to the optical unit.

[0009] Furthermore, the conductor is a sixth type of soft copper conductor that is bundled and twisted in a concentric and unidirectional manner.

[0010] Furthermore, the cooling pipe is a PU rubber hose, the pipe diameter of the cooling pipe is 5mm-8mm, and the wall thickness of the cooling pipe is 1.2mm-2.3mm; a coolant is arranged in the cooling pipe, and the coolant is water.

[0011] Furthermore, the insulating layer is a flame retardant and cold resistant nitrile polyvinyl chloride insulating layer, and the thickness of the insulating layer is 1.3mm-1.6mm.

[0012] Furthermore, the thickness of the water blocking tape is 1.0 mm to 3.0 mm, and the wrapping overlap rate of the water blocking tape is 15 to 25%.

[0013] Furthermore, the metal sheath is a parallel aluminum sheath.

[0014] Furthermore, the outer protective layer is made of PTFE Teflon polytetrafluoroethylene layer.

[0015] In summary, the device structure of the utility model is reasonably designed. The use of the technical solution of the utility model has the following beneficial effects: a cooling tube is arranged in the wire core, and the high thermal conductivity and high specific heat capacity of water are used to reduce the temperature of the conductor; at the same time, the wire core of the utility model adopts a soft structure of a multi-strand copper wire twisted conductor wrapped with insulating material, and the insulating layer is insulated with flame-retardant and cold-resistant nitrile polyvinyl chloride to ensure good softness of the cable; the outer protective layer material is PTFE Teflon polytetrafluoroethylene plastic to improve the softness of the flat cable, as follows:

[0016] 1. The utility model sets a cooling pipe at the center of the conductor when the conductor is twisted, and uses the high thermal conductivity and high specific heat capacity of water to reduce the temperature of the semiconductor device. At the same time, a sensor is set to connect with the optical unit. When the conductor temperature reaches 60°C, the sensor can sense and analyze the measured temperature information provided by the optical unit, and can set the sensor to automatically adjust the water temperature to 55°C when the conductor temperature exceeds 60°C to reduce the conductor temperature.

[0017] 2. The core of the utility model adopts a soft structure to ensure good softness of the cable, and the insulation layer is insulated with flame-retardant and cold-resistant nitrile polyvinyl chloride. The addition of plasticizers and modified fillers in the insulation layer material helps to enhance the softness of the cable in a low temperature environment, thereby preventing cracking and other undesirable phenomena due to increased brittleness in a low temperature state.

[0018] 3. The outer protective layer material is made of PTFE Teflon polytetrafluoroethylene plastic to improve the softness, corrosion resistance and cold resistance of the flat cable.

[0019] 4. The utility model cable is a structure of a multi-strand copper wire stranded conductor wrapped with insulating material, and is a flat cable formed by pressing the sheath material through a high-tech automated equipment production line. It has the advantages of being soft, easy to bend and fold, relatively thin, small, simple to connect, and easy to disassemble. The number and spacing of the wires can be arbitrarily selected, making the connection more convenient, greatly reducing the volume of the product, reducing production costs, and improving production efficiency. It is suitable for use as a data transmission cable or power transmission in electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the cross-sectional structure of the composite flat cable of the utility model;

[0021] Explanation of the reference numerals: 1 - conductor; 2 - cooling tube; 3 - insulation layer; 4 - water blocking tape; 5 - optical unit; 6 - filler; 7 - metal sheath; 8 - outer protective layer. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention, but this does not constitute a limitation on the protection scope of the present invention.

[0023] In the present invention, for a clearer description, the following explanation is made: the observer faces the attached Figure 1 For observation, the left front side of the observer is set as the front, the right rear side of the observer is set as the rear, the left rear side of the observer is set as the left, the right front side of the observer is set as the right, the top of the observer is set as the top, and the bottom of the observer is set as the bottom. It should be pointed out that the terms "front end", "rear end", "left side", "right side", "middle", "top", "bottom" and the like in the text indicate the orientation or position relationship based on the orientation or position relationship set in the drawings, which is only for the convenience of clearly describing the utility model, and does not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", and "fourth" are only used for the purpose of clarifying or simplifying the description, and cannot be understood as indicating or implying relative importance or quantity.

[0024] See also Figure 1 The utility model provides a composite flat cable, including a cable core and a sheath for wrapping the cable core, the cable core includes a plurality of wire cores and a plurality of optical units 5, the wire cores are arranged side by side in the cable core, and the optical units 5 are arranged between the wire cores, and the horizontal heights of the wire cores and the optical units 5 are consistent; the structure of the wire core is sequentially provided with a cooling tube 2, a conductor 1, an insulating layer 3, and a water blocking tape 4 from the inside to the outside; the sheath is sequentially provided with a metal sheath 7 and an outer protective layer 8 from the inside to the outside.

[0025] When the conductor 1 of the utility model is twisted, a cooling pipe 2 is arranged at the center of the conductor 1, and the high thermal conductivity and high specific heat capacity of water are used to reduce the temperature of the semiconductor device. At the same time, a sensor is arranged to be connected with the optical unit. When the temperature of the conductor 1 reaches 60°C, the sensor can sense and analyze the measured temperature information provided by the optical unit 5, and can be set on the sensor to automatically adjust the temperature of the water to 55°C when the temperature of the conductor exceeds 60°C, so as to reduce the temperature of the conductor.

[0026] As a preferred embodiment of the utility model, the cable core also includes a filler 6, which is arranged in the gap between the cable core and the optical unit 5. The filler 6 is a ceramic polyolefin fireproof filler, and the filler 6 is layered filling, and the thickness of each layer is 3.0mm-4.5mm.

[0027] The filler 6 is made of ceramic polyolefin fireproof material with a thickness of 3.0mm-4.5mm; the filler 6 is filled in layers, so it is necessary to ensure that the thinnest point of each layer meets the design requirements during extrusion. This ceramic polyolefin fireproof material has the characteristics of no flame extension, no dripping, and the smoke density can meet the flame retardant B1 level requirements (≥60%). The thickness is set between 3.0mm-4.5mm, with a preferred size of 3.5mm, and is made through a co-extrusion process. It has excellent flame retardant properties, is halogen-free, more environmentally friendly, and effectively protects the inner layer from damage.

[0028] Specifically, the cross-sectional shape of the cable core is two parallel and horizontally positioned straight lines of equal length, and the left and right ends of the two straight lines are connected to a semicircle; the cross-sectional shape of the core is circular, the number of cores is 3, and the number of optical units 5 is 2; the cable also includes a sensor, which is connected to the optical unit 5.

[0029] Specifically, the conductor 1 is a sixth type of soft copper conductor that is bundled and twisted in a concentric and unidirectional manner. The conductor 1 is not only resistant to bending and has a compact structure, but also helps to reduce the outer diameter of the conductor 1.

[0030] Specifically, the cooling pipe 2 is a PU rubber hose, the pipe diameter of the cooling pipe 2 is 5mm-8mm, and the wall thickness of the cooling pipe 2 is 1.2mm-2.3mm; a coolant is arranged in the cooling pipe 2, and the coolant is water.

[0031] The conductor cooling system is a common semiconductor cooling technology, which uses the high thermal conductivity and high specific heat capacity of water to reduce the temperature of semiconductor devices. The utility model uses a cooling pipe 2 to cool the conductor 1, which has the advantages of good cooling effect, no need for special cooling equipment, can be made on site, and generally uses PU hose material. According to the flow rate of water, the pipe diameter is selected from 5mm-8mm and the wall thickness is 1.2mm-2.3mm.

[0032] Specifically, the insulating layer 3 is a flame-retardant and cold-resistant nitrile polyvinyl chloride insulating layer, and the thickness of the insulating layer 3 is 1.3 mm-1.6 mm.

[0033] The insulation layer 3 is a flame retardant and cold resistant nitrile polyvinyl chloride insulation layer. The insulation layer 3 is extruded by extrusion. The thickness of the insulation layer 3 is controlled between 1.3mm-1.6mm. The production speed is controlled at 22m / min. The body extrusion temperature is 165±5℃, and the head extrusion temperature is 188±5℃. Otherwise, it may affect the product appearance quality and the electrical and mechanical properties of the insulation layer.

[0034] Specifically, the thickness of the water blocking tape 4 is 1.0 mm to 3.0 mm, and the wrapping overlap rate of the water blocking tape 4 is 15 to 25%. The water blocking tape 4 can prevent water vapor from liquefying and entering the insulation in the event of a fire, thereby achieving the effect of water blocking, and at the same time prevent the aluminum sheath from being crushed and damaging the insulation shielding under high temperature conditions.

[0035] Specifically, the metal sheath 7 is a parallel aluminum sheath; the outer protective layer 8 is a PTFE Teflon polytetrafluoroethylene layer.

[0036] The metal sheath 7 is a parallel aluminum sheath using a welding process, and the preferred welding process is an argon arc welding process. When welding, attention should be paid to the inert gas flow, welding current, and the distance between the welding core and the welding material to avoid leakage, loose welding, and excessive welding. In addition, the aluminum plate (strip) used must be smooth, especially the welding area must be flat and smooth to avoid affecting the welding quality.

[0037] The outer protective layer 8 is made of PTFE Teflon polytetrafluoroethylene plastic, which makes the cable high temperature resistance level reach 250 degrees and low temperature resistance -60 degrees. It has excellent cold resistance, high temperature resistance, corrosion resistance, weather resistance, acid and alkali resistance, wear resistance, low friction coefficient, low air tightness, low adhesion and environmental protection.

[0038] The parallel aluminum sheath adopted by the utility model also has the following advantages:

[0039] ① It has good tensile properties and can withstand greater pulling force. It is not easy to be damaged during laying and traction. It can also withstand greater deadweight when laid in places with large drop.

[0040] ② It has good compressive resistance and can be used without steel belt when laid underground. It can protect the internal wire core from damage when laid on gravel ground.

[0041] ③ The metal layer has good creep resistance, and it is not easy for the metal lattice to deform and destroy the shape under the influence of its own weight, temperature and internal force.

[0042] ④Good anti-vibration performance, no additional anti-vibration device is needed in general vibration places, such as bridges, railways, and around highways.

[0043] ⑤ Aluminum sheaths have good shielding properties, which can shield the surrounding electromagnetic interference and ensure the stability of current and signal transmission. Their conductivity is also better than that of steel belts and steel wires, and they can carry larger fault currents and ensure the safety of the lines.

[0044] The insulating layer adopted by the utility model also has the following advantages:

[0045] The flame retardant and cold resistant nitrile polyvinyl chloride insulation layer includes the following components: polyvinyl chloride, insulating agent, flame retardant, nitrile rubber, plasticizer, stabilizer, antioxidant, and modified filler. The flame retardant and cold resistant nitrile polyvinyl chloride is used as the insulation layer. By adding nitrile rubber, flame retardant, plasticizer and modified filler to the polyvinyl chloride, the material has good flame retardancy, cold resistance and oil resistance, which can make the cable performance sufficient for application in coaxial cable and can also be made into elevator flat cable for communication.

[0046] The insulation material is extruded to improve the bending ability of the core. The addition of plasticizers and modified fillers in the insulation layer material helps to enhance the flexibility of the cable in low temperature environments, thereby preventing cracking and other undesirable phenomena due to increased brittleness in low temperature conditions.

[0047] The insulation layer is made of flame-retardant and cold-resistant nitrile polyvinyl chloride insulation, which is mainly made of nitrile rubber and mixed with 30% to 50% polyvinyl chloride resin. The blending process uses two latexes, which are mixed in the required proportion and then subjected to coagulation, washing, drying, heat treatment and other processes. Compared with nitrile rubber, nitrile / polyvinyl chloride blended rubber has improved ozone resistance and weather aging resistance, improved tensile strength, tensile stress, tear resistance, heat resistance and flame resistance, improved oil resistance, fuel oil resistance and chemical resistance, improved extrusion and calendering processing performance, and also improved storage stability, and can be colored arbitrarily. Nitrile / polyvinyl chloride blended rubber can be used for wire and cable sheaths, oil pipe outer rubber, leather rollers and leather rings, automotive molded parts, microporous sponges, foam insulation layers, safety boots, etc.

[0048] The filler used in the utility model also has the following advantages:

[0049] Ceramic polyolefin fireproof materials can quickly generate a complete ceramic shell under the conditions of temperature or flame above 650℃, with a bending strength of up to 10MPa, a dielectric strength greater than 20kV / mm, and a volume resistivity higher than 5x10” cm; the generated ceramic shell does not crack or drip, and in addition to having excellent electrical isolation performance, it also has excellent oxygen and heat insulation effects, which can effectively isolate the high temperature flame from invading the inside of the line, delay the decomposition of the internal materials, avoid the conductor from melting in the flame, and ensure the smooth flow of the line in the event of a fire.

[0050] The ceramicized polyolefin fireproof material can generate a hard ceramic-like shell under flame or high temperature conditions. The shell does not melt or drip, is resistant to water spray and mechanical vibration, and has very good heat insulation and fireproof effects. It can ensure the smooth flow of electricity and information control in the event of a fire, thus buying precious time for personnel escape and fire rescue.

[0051] In summary, the utility model provides a composite flat cable, which has excellent high temperature and fire resistance, good flexibility, high current carrying capacity, long life, tensile strength, flame retardancy, waterproofness, moisture resistance, anti-interference, corrosion resistance, radiation resistance, environmental protection and other characteristics. It can be used in many types of areas and places, such as: building wiring, industrial cables, rail transit, photovoltaic power generation, marine engineering, marine cables, automotive cables, etc.

[0052] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A composite flat cable, comprising a cable core and a sheath for wrapping the cable core, characterized in that: The cable core includes a plurality of wire cores and a plurality of optical units. The wire cores are arranged side by side in the cable core, and optical units are arranged between two wire cores. The horizontal heights of the wire cores and the optical units are consistent. The structure of the wire core is provided with a cooling tube, a conductor, an insulating layer, and a water-blocking tape in sequence from the inside to the outside. The sheath is provided with a metal sheath and an outer protective layer in sequence from the inside to the outside.

2. A composite flat cable according to claim 1, characterized in that: The cable core also includes a filler, which is arranged in the gap between the wire core and the optical unit in the cable core. The filler is a ceramic polyolefin fireproof filler, and the filler is filled in layers, with each layer having a thickness of 3.0 mm to 4.5 mm.

3. A composite flat cable according to claim 1 or 2, characterized in that: The cross-sectional shape of the cable core is two upper and lower parallel straight lines of equal length at the same horizontal position, and the left and right ends of the two straight lines are connected to a semicircle.

4. A composite flat cable according to claim 3, characterized in that: The cross-sectional shape of the wire core is circular, the number of the wire cores is 3, and the number of the optical units is 2; the cable also includes a sensor, and the sensor is connected to the optical unit.

5. The composite flat cable according to claim 1, characterized in that: The conductor is a sixth type of soft copper conductor that is bundled and twisted in a concentric and unidirectional manner.

6. A composite flat cable according to claim 4, characterized in that: The cooling pipe is a PU rubber pipe, the pipe diameter of the cooling pipe is 5mm-8mm, and the wall thickness of the cooling pipe is 1.2mm-2.3mm; a coolant is arranged in the cooling pipe, and the coolant is water.

7. The composite flat cable according to claim 1, characterized in that: The insulating layer is a flame retardant and cold resistant nitrile polyvinyl chloride insulating layer, and the thickness of the insulating layer is 1.3mm-1.6mm.

8. The composite flat cable according to claim 1, characterized in that: The thickness of the water blocking tape is 1.0 mm to 3.0 mm, and the wrapping overlap rate of the water blocking tape is 15 to 25%.

9. The composite flat cable according to claim 1, characterized in that: The metal sheath is a parallel aluminum sheath.

10. The composite flat cable according to claim 1, characterized in that: The outer protective layer is a PTFE Teflon polytetrafluoroethylene layer.

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