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Precision-grade high-temperature resistant thermocoupling compensation wire for nickel chromium-nickel silicon thermocoupler

A technology for compensating wires and thermocouples, applied in conductors, circuits, insulated cables, etc., can solve the problems that the performance of compensating wires cannot meet higher quality requirements, and achieve the effects of excellent anti-aging, high precision and simple production process.

Inactive Publication Date: 2016-12-07
西安飞机工业(集团)亨通航空电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of industrial technology, the requirements for the environment, temperature and precision level are getting higher and higher, and the performance of the existing compensation wires cannot meet the higher quality requirements

Method used

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  • Precision-grade high-temperature resistant thermocoupling compensation wire for nickel chromium-nickel silicon thermocoupler
  • Precision-grade high-temperature resistant thermocoupling compensation wire for nickel chromium-nickel silicon thermocoupler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] as attached figure 1 The shown nickel-chromium-nickel-silicon thermocouple uses a precision-grade high-temperature-resistant thermocouple compensation wire, including: conductor 1, the insulating layer 2 covered by the conductor 1, the sheath layer 3 outside the insulating layer 2 and the outer sheath layer 3 The shielding layer 4; the conductor 1 is composed of a positive bare copper conductor 1-1 and a negative copper-nickel conductor 1-2; the insulating layer 2 is a positive insulating layer 2- 1. The insulating layer 2 is the negative insulating layer 2-2 coated outside the negative copper-nickel conductor 1-2; the positive bare copper conductor covered with the positive insulating layer and the negative copper-nickel conductor covered with the negative insulating layer are parallel and juxtaposed Placement; the insulation layer 2 and the sheath layer 3 are high and low temperature resistant tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer materials.

Embodiment 2

[0029] On the basis of embodiment 1, the conductor structure of the nickel-chromium-nickel-silicon thermocouple of the present invention is that the bare copper conductor 1-1 of 7 / 0.43mm is the positive pole, and the conductor structure of the high-temperature resistant thermocouple compensation wire of 7 / 0.43mm Copper-nickel (the chemical composition ratio of copper and nickel is 60:40) conductor 1-2 is the negative electrode.

[0030] The insulating material of the insulating layer 2 is tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer material, the operating temperature range is -60 ° C ~ 250 ° C, the tensile strength of the insulating layer is ≥ 13.8Mpa, and the elongation of the insulating layer is ≥ 100%. The color of the positive insulation 2-1 is red, and the color of the negative insulation 2-2 is blue.

[0031] The material of the sheath layer 3 is tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer material, the service temperature range is -60°C to 2...

Embodiment 3

[0034] On the basis of embodiment 1, the preparation process of the precision-grade high-temperature-resistant thermocouple compensation wire for nickel-chromium-nickel-silicon thermocouple of the present invention is as follows:

[0035] 1. Conductor 1 stranding: Conductor 1 is stranded with stranding equipment beam machine and frame stranding machine. The annealed 7 / 0.43mm bare copper monofilament is selected to be twisted leftward according to the pitch ratio of 13 to form the positive conductor 1-1; the annealed 7 / 0.43mm copper nickel is selected (the chemical composition ratio of copper and nickel is 60:40 ) monofilaments are twisted leftward according to the pitch ratio of 13 to form the negative conductor 1-2.

[0036] 2. Extrusion of the insulating layer 2: the insulating layer 2 is extruded with a high-temperature extruder. The insulating material is tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer material; the concentricity of the insulating layer is 88%; ...

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Abstract

The invention belongs to the technical field of a cable, and in particular relates to a precision-grade high-temperature resistant thermocoupling compensation wire for a nickel chromium-nickel silicon thermocoupler. The precision-grade high-temperature resistant thermocoupling compensation wire for the nickel chromium-nickel silicon thermocoupler comprises conductors, insulation layers, a sheath layer and a shielding layer, wherein the insulation layers wrap the conductors, the sheath layer is arranged outside the insulation layers, the shielding layer is arranged outside the sheath layer, the conductors comprise a positive electrode naked copper conductor and a negative electrode copper-nickel conductor, the insulation layer wrapping the positive electrode naked copper conductor is a positive electrode insulation layer, the insulation layer wrapping the negative electrode copper-nickel conductor is a negative electrode insulation layer, and the insulation layers and the sheath layer are made of high- and low-temperature resistant tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymers. The precision-grade high-temperature resistant thermocoupling compensation wire for the nickel chromium-nickel silicon thermocoupler has the advantages of high resistance to high and low temperatures, aging resistance and high precision, and the product quality is far higher than the standard of an existing product.

Description

technical field [0001] The invention belongs to the technical field of wires and cables, and in particular relates to a precision-grade high-temperature-resistant thermocouple compensation wire for a nickel-chromium-nickel-silicon thermocouple. Background technique [0002] In a certain temperature range, the compensation wire has the same thermal electromotive force nominal value as the matched thermocouple, which is used to connect the thermocouple and the measuring device, and can compensate the error caused by the temperature change at the connection between them and the thermocouple, thus forming a common Class or precision temperature measurement and control system. [0003] The usual method is to coat insulating material on the surface of the conductor with the same thermoelectric properties as the noble metal thermocouple to make a soft cable. Since the ability of flexible cable insulation materials to withstand high temperature and corrosion is limited, they are of...

Claims

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Application Information

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IPC IPC(8): H01B7/29H01B7/28H01B7/18H01B7/295
CPCY02A30/14H01B7/29H01B7/18H01B7/28H01B7/295
Inventor 李学虎郝精一陈洁林雪涛宋现利
Owner 西安飞机工业(集团)亨通航空电子有限公司
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