Signal transmission cable

Abstract

A signal transmission cable relates to the technical field of wires and cables and comprises a cable core, the cable core comprises a pair of signal lines and a pair of power lines, each signal line comprises a first conductor on the inner layer and a first high-density PE insulating layer on the outer layer, the first conductor is formed by stranding sixteen tin-plated oxygen-free copper wires with the diameter of 0.20 mm, and the second conductor is formed by stranding sixteen tin-plated oxygen-free copper wires with the diameter of 0.20 mm. An aluminum-plastic composite tape sub-shielding layer is wound on the periphery of the pair of signal lines; the power line comprises a second conductor on the inner layer and a second high-density PE insulating layer on the outer layer. The second conductor is formed by bunch stranding of seventy-seven tin-plated oxygen-free copper wires with the diameter of 0.20 mm. A PE polyester tape inner isolating layer is wound outside the cable core, a tinned copper wire total shielding layer is woven outside the PE polyester tape inner isolating layer, a PE polyester tape outer isolating layer is wound outside the tinned copper wire total shielding layer, and a 105 DEG C high-flame-retardant polyvinyl chloride protective layer is extruded outside the PE polyester tape outer isolating layer. The cable is small in signal attenuation, strong in anti-interference performance, stable in signal transmission, and good in flame retardation effect.

Description

Technical Field

[0001] The utility model relates to the technical field of electric wires and cables, in particular to the structure of a signal transmission cable. Background Art

[0002] In agricultural planting, moderate soil moisture regulation is the key, which directly affects the supply of social crops and people's lives, and is of paramount importance. Some moisture monitoring equipment has been widely used, but most of them rely on human experience to visually observe, and the accuracy needs to be verified. There are some monitoring equipment, but they basically need to go to the site for sampling, which is troublesome and limited, and wastes a lot of human resources. With the progress of the times and the continuous development of science and technology, a remote intelligent monitoring system for soil moisture has emerged. The system can monitor the soil moisture status of the region in real time through remote control. It does not need to go to the site of the soil moisture that needs to be monitored. It can collect data through a remote data collection device, which can facilitate farmers to improve the local soil moisture. For this reason, higher requirements are put forward for the signal transmission cable that matches the system, and the existing cables have defects such as signal attenuation, poor anti-interference performance, unstable signal transmission, and poor flame retardant performance. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and to provide a signal transmission cable with small signal attenuation, strong anti-interference performance, stable signal transmission and good flame retardant effect.

[0004] The purpose of the utility model is achieved as follows: a signal transmission cable, comprising a cable core, the cable core comprising a pair of signal wires and a pair of power wires, the signal wire comprising an inner first conductor and an outer first high-density PE insulation layer, the first conductor is formed by twisting sixteen tinned oxygen-free copper wire bundles with a diameter of 0.20 mm, and an aluminum-plastic composite tape shielding layer is wound around the outer periphery of the pair of signal wires; the power wire comprises an inner second conductor and an outer second high-density PE insulation layer, the second conductor is formed by twisting seventy-seven tinned oxygen-free copper wire bundles with a diameter of 0.20 mm; a PE polyester tape inner isolation layer is wound around the cable core, a tinned copper wire total shielding layer is woven outside the PE polyester tape inner isolation layer, a PE polyester tape outer isolation layer is wound outside the tinned copper wire total shielding layer, and a 105°C high flame-retardant polyvinyl chloride sheath is extruded outside the PE polyester tape outer isolation layer.

[0005] Preferably, the cable core also includes a flame retardant glass fiber filling layer.

[0006] The beneficial effects of the utility model are as follows: the utility model is composed of a pair of signal lines and a pair of power lines, which are concentrically composed, with a compact product structure, a sub-shielding layer and a total shielding layer, and an inner and outer isolation layer of a PE polyester tape, which has strong anti-interference performance, small signal attenuation, increases the transmission distance of the cable, enhances the stability of the transmitted data signal, makes the data signal transmitted to the terminal device correct, and reduces the error rate. The 105℃ high flame retardant polyvinyl chloride sheath is flame retardant and does not extend combustion when burning, has good mechanical properties, and is suitable for low-frequency signal transmission lines in remote intelligent soil moisture monitoring systems of 300 / 500v and below at AC 50HZ. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0008] like Figure 1 As shown, the signal transmission cable includes a cable core 13, and the cable core 13 includes a pair of signal wires 9, a pair of power wires 10 and a flame-retardant glass fiber filling layer 4. The signal wire 9 includes an inner first conductor 1 and an outer first high-density PE insulation layer 2. The first conductor 1 is formed by twisting sixteen tinned oxygen-free copper wire bundles with a diameter of 0.20 mm. The first high-density PE insulation layer 2 is extruded outside the first conductor 1, and an aluminum-plastic composite tape shielding layer 3 is wrapped around the outer periphery of the pair of signal wires 9. The power wire 10 includes an inner second conductor 11 and an outer second high-density PE insulation layer 12. The second conductor 11 is formed by twisting seventy-seven tinned oxygen-free copper wire bundles with a diameter of 0.20 mm. The second high-density PE insulation layer 12 is extruded outside the second conductor 11.

[0009] A PE polyester tape inner isolation layer 5 is wrapped around the cable core 13, a tinned copper wire total shielding layer 6 is woven outside the PE polyester tape inner isolation layer 5, a PE polyester tape outer isolation layer 7 is wrapped outside the tinned copper wire total shielding layer 6, and a 105°C highly flame-retardant polyvinyl chloride sheath 8 is extruded outside the PE polyester tape outer isolation layer 7.

[0010] This product has the advantages of small inherent conductor attenuation, high far-end crosstalk attenuation, characteristic impedance maintained at 80±10Ω (1MHZ), fast, accurate, stable and reliable long-distance signal transmission, strong anti-interference, flame retardant and no flame extension when burning, and good mechanical properties. The long-term allowable operating temperature of the cable conductor should not exceed 90℃, the ambient temperature of use is -30℃~+105℃, and the installation and laying temperature is not lower than -20℃.

[0011] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A signal transmission cable, characterized in that: The cable core comprises a pair of signal lines and a pair of power lines. The signal line comprises a first conductor in an inner layer and a first high-density PE insulation layer in an outer layer. The first conductor is formed by twisting sixteen tinned oxygen-free copper wire bundles with a diameter of 0.20 mm. An aluminum-plastic composite tape shielding layer is wound around the outer periphery of the pair of signal lines. The power line comprises a second conductor in an inner layer and a second high-density PE insulation layer in an outer layer. The second conductor is formed by twisting seventy-seven tinned oxygen-free copper wire bundles with a diameter of 0.20 mm. An inner insulating layer of PE polyester tape is wound around the cable core, a tinned copper wire total shielding layer is woven outside the inner insulating layer of PE polyester tape, a PE polyester tape outer insulating layer is wound outside the tinned copper wire total shielding layer, and a 105°C highly flame-retardant polyvinyl chloride sheath is extruded outside the PE polyester tape outer insulating layer.

2. The signal transmission cable according to claim 1, characterized in that: The cable core also includes a flame retardant glass fiber filling layer.

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