Signal cable structure of intelligent high-precision instruments and meters

Abstract

The invention discloses a signal cable structure of intelligent high-precision instruments and meters and belongs to the technical field of special wires and cables. The signal cable structure of intelligent high-precision instruments and meters comprises a cable core and an outer sheath covering the cable core in an extruded mode, the cable core comprises signal transmission wires, a wrapping layer wrapping the signal transmission wires and a shielding layer arranged outside the wrapping layer, the outer sheath covers the shielding layer in an extruded mode, and each signal transmission wire comprises a conductor and a conductor insulating layer covering the conductor in an extruded mode. The signal cable structure of intelligent high-precision instruments and meters is characterized in that the conductors are tinning fine copper wire stranded conductors, the conductor insulating layers are made of cross-linked polyolefin, and the outer sheath is made of chlorosulfonated polyethylene. The structure of the signal transmission wires tends to be reasonable, the signal transmission wires are prevented from being oxidized at high temperature, and signals can be transmitted durably and effectively; it is ensured that the conductors have good electrical property stability; the outstanding weather change resistance, thermal resistance, ionizing radiation resistance, low temperature resistance and chemical corrosion resistance are represented, and ideal mechanical properties such as the electrical insulation property and compression and abrasion resistance are represented.

Description

technical field [0001] The invention belongs to the technical field of special electric wires and cables, and in particular relates to a high-precision intelligent instrumentation signal cable structure. Background technique [0002] The aforementioned high-precision intelligent instrumentation is a general term for electronic and electrical devices that can accurately display many physical quantities. It has the advantages of good stability, high reliability and precision, and easy maintenance. In recent years, my country's smart instrument technology has made great progress. The medium and low-end intelligent instruments and meters have shown strong international competitiveness. The production capacity of typical digital multimeters, electric energy meters, water meters, etc. accounts for 50% of the global total. above. Another example is the high-precision intelligent instruments represented by mass spectrometers, which have also achieved technological breakthroughs and ...

AI Technical Summary

Problems solved by technology

[0004] At present, PVC (polyvinyl chloride) is generally used as the outer sheath of high-precision intelligent instrumentation cables. Although this kind of cable has good flexibility and is convenient for laying during construction, it is prone to adhesion and compression resistance at high temperatures. Weak and easy to crack when in contact with oil substances and affect the reasonable service life is its shortcoming

[0005] In the published Chinese patent literature, various technical information about signal cables for precision instruments and meters can be seen. A typical example is the "Automated Precision Instrument Cable" recommended by the authorized announcement number CN201178003Y. The cable obtained by this patent scheme has positive significance for anti-interference and anti-vibration , but there are the following deficiencies: First, because the outer sheath extruded and embedded in the four cores is polyvinyl chloride, there are many shortcomings mentioned above; second, because the four cores with the same structure are composed of conductors, It is composed of a polyvinyl chloride insulating layer combined with the conductor, a semiconductive layer combined with the polyvinyl chloride insulating layer, and a metal shielding layer arranged outside the semiconductive layer, so the structure is relatively complicated and there is a waste of resources

Another example is the "cable for special precision instruments" provided by the authorized announcement number CN202230777U. This patent solution can reflect the technical effect recorded in paragraph 0006 of its specification, but it has the following disadvantages: First, due to the insulating layer covering the conductor 1 High-density polyethylene is used and because the outer sheath uses high flame-retardant polyolefin, the overall flexibility of the cable is affected to a certain extent; the second is that a pair of conductors that are respectively covered with a high-density polyethylene insulation layer Set the first aluminum foil wrapping layer, the first steel wire braiding layer and the first copper tape wrapping layer in sequence to form a pair of cable cores, and then set the second aluminum foil wrapping layer and the second steel wire wrapping layer outside the pair of cable cores in sequence. The braiding layer and the second steel strip are wrapped around the cladding, and finally the aforementioned outer sheath is extruded around the second steel strip around the cladding, that is, the high flame-retardant polyolefin is extruded, so the structure is very complicated and consumes a lot of resources

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