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Production process of insulating layer of railway signal cable

A cable insulation, railway signal technology, applied in insulators, organic insulators, plastic/resin/wax insulators, etc., can solve the problems of reducing cable insulation performance, signal cable mechanical aging, signal equipment failure, etc. mold, the effect of increasing hardness

Active Publication Date: 2018-12-21
ANHUI TIANCAI CABLE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A large number of signal cables are used in railway field signal equipment. The signal cables will undergo mechanical aging, thermal aging, and electrical aging. If they accumulate to a certain extent, they will cause partial discharge and reduce the insulation performance of the cables. When the insulation performance of the signal cables decreases or fails, it will cause Failure of signaling equipment, which may lead to safety incidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A production process for a railway signal cable insulation layer, comprising the following steps:

[0026] (1) Mix 150 parts of nano-titanium dioxide modified polyvinyl chloride, 80 parts of dibutyl hydroxytoluene, 60 parts of corundum modified polycarbonate and 30 parts of isoprene rubber, and put them into a high-speed mixer at a speed of 600r / min Stir for 40 min, add the mixture to the potassium cyanide solution of basic copper carbonate with a mass concentration of 20 times the weight of the mixture and 3%, stir for 2 h at a speed of 150 r / min, centrifuge, wash the precipitate with deionized water, and put drying in a drying oven;

[0027] (2) Dissolve the dried mixture in the above steps in a calcium chloride solution that is 30 times the weight of the mixture and have a mass concentration of 10%, and place the solution in a 35°C water bath. When the temperature of the solution rises to the temperature of the water bath, keep the temperature Stir the solution at 1...

Embodiment 2

[0031] A production process for a railway signal cable insulation layer, comprising the following steps:

[0032] (1) Mix 180 parts of nano-titanium dioxide modified polyvinyl chloride, 100 parts of dibutyl hydroxytoluene, 90 parts of corundum modified polycarbonate and 60 parts of isoprene rubber, and put them in a high-speed mixer at a speed of 800r / min Stir for 60 min, add the mixture to the potassium cyanide solution of basic copper carbonate with a mass concentration of 30 times the weight of the mixture and 6%, stir for 3 h at a speed of 200 r / min, centrifuge, wash the precipitate with deionized water, and put drying in a drying oven;

[0033] (2) Dissolve the dried mixture in the above steps in a calcium chloride solution that is 50 times the weight of the mixture and have a mass concentration of 13%, and place the solution in a water bath at 45°C. When the temperature of the solution rises to the temperature of the water bath, heat the Stir the solution at 120r / min fo...

Embodiment 3

[0041] A production process for a railway signal cable insulation layer, comprising the following steps:

[0042] (1) Mix 160 parts of nano-titanium dioxide modified polyvinyl chloride, 90 parts of dibutyl hydroxytoluene, 70 parts of corundum modified polycarbonate and 40 parts of isoprene rubber, and put them in a high-speed mixer at a speed of 700r / min Stir for 50 minutes, add the mixture to the potassium cyanide solution of basic copper carbonate with a mass concentration of 4% and 25 times the weight of the mixture, stir for 3 hours at a speed of 170r / min, centrifuge, wash the precipitate with deionized water, and put drying in a drying oven;

[0043] (2) Dissolve the dried mixture in the above steps in a calcium chloride solution that is 40 times the weight of the mixture and have a mass concentration of 12%, and place the solution in a water bath at 40°C. When the temperature of the solution rises to the temperature of the water bath, heat the Stir the solution at 110r / ...

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PUM

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Abstract

The invention discloses a production process of an insulating layer of a railway signal cable, and relates to the field of signal cables. The production process comprises the steps of evenly mixing nano titanium dioxide modified polyvinyl chloride with dibutylhydroxytoluene, corundum modified polycarbonate and isoprene rubber, stirring by using a high speed mixer, then putting the obtained mixtureinto a potassium cyanide solution of basic copper carbonate and stirring, centrifuging, drying, and then adding a calcium chloride solution; adding tert-butyl-4-hydroxyanisole, dicumyl peroxide, acetic acid-nitrocellulose and 2-methyl methacrylate in a water bath; finally, adding boron fibers, nano-alumina and methyl methacrylate-n-butyl acrylate-sodium allyl sulfonate, carrying out ball milling,adding sesame oil, fumigating under saturated steam pressure, and sending to an extruder for extrusion molding. The prepared insulating layer is high in strength, good in aging resistance and corrosion resistance, and longer in service life.

Description

Technical field: [0001] The invention relates to the field of signal cables, in particular to a production process for the insulating layer of railway signal cables. Background technique: [0002] A signal cable is a signal transmission tool. Generally, the signal transmitted by the signal cable is very small. In order to avoid signal interference, there is a shielding layer outside the signal cable. The shielding layer of the wrapped conductor is generally conductive cloth, braided copper mesh or copper mooring (aluminum), and the shielding layer needs to be grounded. External interference signals can be guided into the ground by this layer, preventing interference signals from entering the inner conductor and reducing the loss of transmission signals. [0003] Railway signal cables also have multiple signal functions such as broadband network, IPTV, transmission telephone, fax, videophone, anti-theft alarm, etc. With the rapid development of intelligent buildings, compute...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L69/00C08L9/00C08K3/22C08K7/06C08K5/13C08K13/06C08K9/10H01B3/44
CPCC08K2003/2227C08K2003/2241C08K2201/011C08L27/06C08L2201/08C08L2203/202C08L2205/035H01B3/443C08L69/00C08L9/00C08K3/22C08K7/06C08K5/13C08K13/06C08K9/10
Inventor 林建宝瞿庆广林新中陶伟高昌林李贻昌徐家斌李登军
Owner ANHUI TIANCAI CABLE GRP
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