CN103499398B

CN103499398B - Linear thermometric cable

Info

Publication number: CN103499398B
Application number: CN201310466368.2A
Authority: CN
Inventors: 吴加伦; 陈宇
Original assignee: Zhejiang Lunte Mechanical & Electrical Co Ltd
Current assignee: Zhejiang Lunte Mechanical & Electrical Co Ltd
Priority date: 2013-10-09
Filing date: 2013-10-09
Publication date: 2016-01-13
Anticipated expiration: 2033-10-09
Also published as: CN103499398A

Abstract

The present invention relates to a kind of linear thermometric cable, comprise positive thermocouple wire, negative thermocouple wire and earth lead, positive thermocouple wire and negative thermocouple wire are through in two first fiber nets respectively, and be through in the second fiber net in the lump with earth lead, the outside of the second fiber net has screen layer outward successively by inner, insulation course and protective seam, first fiber net and the second fiber net be filling thermo-sensitive material powder respectively, does thermo-sensitive material powder comprise containing Mn2O3? 40-60%, Fe2O3? 20-30%, Bi2O3? the potpourri of 20-30% three kind of component is after 600-1000 DEG C of sintering, add NTC powder according to a certain ratio again, PVB, ethyl cellulose, PEG400, JFC, methylol silicone oil, terpinol is ground to Powdered.The present invention can carry out real-time dynamic monitoring at lower temperature range (0-200 DEG C) to testee, has the advantages such as high stability, high reliability, high precision.

Description

Linear thermometric cable

Technical field

The present invention relates to a kind of linear thermometric cable, particularly relate to a kind of linear thermometric cable at 0 ~ 200 DEG C of energy thermometric.

Background technology

Linear dynamic surface thermocouple has the feature of real-time dynamic monitoring testee temperature, is able to widespread use.At present, this type of thermopair is applicable to the high temperature range of more than 80 DEG C usually, cannot monitor the temperature range lower than 80 DEG C.And many regions or equipment surface, just there is potential safety hazard in the so-called low temperature environment often below 80 DEG C.As the feeder cable etc. of tank surface, oil pipeline, coal bunker, silo, freight house, dangerous goods store, tunnel, machine room, switch board, coal handling system transport tape and generating plant, transformer station.

Summary of the invention

Technical matters to be solved by this invention is: providing a kind of can carry out the linear thermometric cable of real-time dynamic monitoring in lower temperature range to measured object, the just energy early warning when accident does not occur, make user have the sufficient time to take appropriate measures, Accident prevention occurs.

For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of linear thermometric cable, comprise positive thermocouple wire, negative thermocouple wire and earth lead, described positive thermocouple wire and negative thermocouple wire are through in two first fiber nets respectively, two first fiber nets are through in the second fiber net in the lump, the outside of described second fiber net has screen layer outward successively by inner, insulation course and protective seam, earth lead is placed between screen layer and insulation course, described first fiber net and the second fiber net be filling thermo-sensitive material powder respectively, described thermo-sensitive material powder comprises containing Mn ₂o ₃40-60%, Fe ₂o ₃20-30%, Bi ₂o ₃the potpourri of 20-30% three kind of component is after 600-1000 DEG C of sintering, add NTC powder again, PVB, ethyl cellulose, PEG400, JFC, methylol silicone oil, terpinol be ground to Powdered, the proportioning (weight ratio) of above-mentioned each component is as follows: mix powder 30-40%, NTC powder 30-40%, PVB1-5%, ethyl cellulose 1-5%, PEG4005-10%, JFC1-3%, methylol silicone oil 0.1-2%, terpinol 10-20%.

Note: NTC(NegativeTemperatureCoeffiCient) refer to the exponentially relation reduction of temperature rising resistance, thermistor phenomenon and the material with negative temperature coefficient), be a kind of resistance material widely applied.

Optimal technical scheme of the present invention is: described respectively in wear positive and negative two thermocouple wires two the first fiber nets be twisted pair construction.Described first fiber net and the second fiber net are alkali-free glass fiber cloth net, and described screen layer is Aluminium Foil Package coating, and described insulation course is nonwoven fabrics clad, and described protective seam is teflin tape clad.

Beneficial effect of the present invention: the thermo-sensitive material 1, containing NTC belongs to negative temperature coefficient thermistor composition, can be able to reduce along with the rising resistance of temperature, thus thermopair can be made to export the millivolt signal of minimum resistance section, to reach the effect that maximum temperature exports, real-time dynamic monitoring can be carried out at wide temperature range (0-200 DEG C) to testee.2, positive and negative two thermocouple wires are twisted pair construction, and with earth lead and outer cladded aluminum foil screen layer, can reduce extraneous undesired signal to the impact of thermocouple output signal, thus reach the accuracy of measurement.3, outermost is two-layer is nonwoven fabrics and teflon clad, has dual waterproof, the feature that can bend arbitrarily again.

This linear thermometric cable can be wrapped in testee surface, or along cable distribution, when the temperature of any point is elevated to alarm temperature point, system just can be reported to the police.In electric control chamber, also can monitor the maximum temperature of all control points at any time, understand the operating mode of equipment or cable.There is the advantages such as high stability, high reliability, high precision.

Below in conjunction with drawings and Examples, technology contents of the present invention is described further.

Accompanying drawing explanation

Fig. 1 is the structural representation of an embodiment of the present invention linear thermometric cable.

Embodiment

As shown in Figure 1, the present embodiment linear thermometric cable, comprises positive thermocouple wire 1.1, negative thermocouple wire 1.2, two first fiber net 2, second fiber nets 3 and earth leads 7.Thermocouple wire adopts the thermocouple wire of K type thermocouple wire or other type, and just very nickel chromium, negative pole is nisiloy material, and thermo wires diameter is 0.4mm, and earth lead 7 material is pure nickel wire, and diameter is 0.3mm.Positive and negative two thermocouple wires are through in two first fiber nets 2 respectively, and two first fiber nets 2 also become twisted pair construction shaping, are through in the lump in the second fiber net (3).The outside of the second fiber net 3 is by inner outward successively with screen layer 4, insulation course 5 and protective seam 6, and earth lead 7 is placed between screen layer 4 and insulation course 5.First fiber net 2 and the second fiber net 3 adopt alkali-free glass fiber cloth net, and screen layer 4 adopts Aluminium Foil Package coating, and insulation course 5 adopts nonwoven fabrics clad, and protective seam 6 adopts teflin tape clad.First fiber net 2 and the second fiber net 3 be filling thermo-sensitive material powder respectively, by soaking into technique, by thermo-sensitive material powder filling in the mesh of the first fiber net 2 and the second fiber net 3.Described thermo-sensitive material powder comprises containing Mn ₂o ₃40-60%, Fe ₂o ₃20-30%, Bi ₂o ₃the potpourri of 20-30% three kind of component is after 600-1000 DEG C of sintering, add NTC powder again, PVB, ethyl cellulose, PEG400, JFC, methylol silicone oil, terpinol be ground to Powdered, the proportioning (weight ratio) of above-mentioned each component is as follows: mix powder 30-40%, NTC powder 30-40%, PVB1-5%, ethyl cellulose 1-5%, PEG4005-10%, JFC1-3%, methylol silicone oil 0.1-2%, terpinol 10-20%.

Claims

1. a linear thermometric cable, it is characterized in that: comprise positive thermocouple wire (1.1), negative thermocouple wire (1.2) and earth lead (7), described positive thermocouple wire (1.1) and negative thermocouple wire (1.2) are through in two first fiber nets (2) respectively, two first fiber nets (2) are through in the second fiber net (3) in the lump, the outside of described second fiber net (3) has screen layer (4) outward successively by inner, insulation course (5) and protective seam (6), earth lead (7) is placed between screen layer (4) and insulation course (5), described first fiber net (2) and the second fiber net (3) be filling thermo-sensitive material powder respectively, described thermo-sensitive material powder comprises containing Mn ₂o ₃40-60%, Fe ₂o ₃20-30%, Bi ₂o ₃the potpourri of 20-30% three kind of component is after 600-1000 DEG C of sintering, add NTC powder again, PVB, ethyl cellulose, PEG400, JFC, methylol silicone oil, terpinol be ground to Powdered, the proportioning (weight ratio) of above-mentioned each component is as follows: mix powder 30-40%, NTC powder 30-40%, PVB1-5%, ethyl cellulose 1-5%, PEG4005-10%, JFC1-3%, methylol silicone oil 0.1-2%, terpinol 10-20%.

2. linear thermometric cable according to claim 1, is characterized in that: two the first fiber nets (2) also become twisted pair construction.

3. linear thermometric cable according to claim 1 and 2; it is characterized in that: described first fiber net (2) and the second fiber net (3) are alkali-free glass fiber cloth net; described screen layer (4) is Aluminium Foil Package coating; described insulation course (5) is nonwoven fabrics clad, and described protective seam (6) is teflin tape clad.