CN209843285U - Compensating lead for thermocouple - Google Patents
Compensating lead for thermocouple Download PDFInfo
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- CN209843285U CN209843285U CN201921159149.9U CN201921159149U CN209843285U CN 209843285 U CN209843285 U CN 209843285U CN 201921159149 U CN201921159149 U CN 201921159149U CN 209843285 U CN209843285 U CN 209843285U
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- temperature measuring
- wire
- line
- insulating layer
- thermocouple
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Abstract
The utility model discloses a compensation wire for a thermocouple, which relates to the field of compensation wires for thermocouples and comprises a cable core and a covering layer, wherein the covering layer covers the cable core, the cable core comprises a power line and a temperature measuring line, and the power line is covered with a first insulating layer; the temperature measuring lines comprise a first temperature measuring line and a second temperature measuring line, the first temperature measuring line and the second temperature measuring line are arranged in parallel, and the temperature measuring lines are coated with second insulating layers; the cladding comprises an inner insulating layer, a shielding layer, an outer insulating layer and a sheath layer from inside to outside in sequence. There is the easy chaotic problem of wiring to prior art, the utility model discloses add the temperature measurement line in the cable core for only need connect a wire and can realize temperature measurement between thermocouple and the measuring device, the wiring is clear.
Description
Technical Field
The utility model relates to a compensation wire field for the thermocouple, more specifically say, it relates to a compensation wire for thermocouple.
Background
The compensation lead for the thermocouple is a pair of lead wires with insulating layers having the same nominal value as the thermal electromotive force of the matched thermocouple in a certain temperature range (including normal temperature), and the thermocouple and the measuring device are connected by the lead wires so as to compensate the error generated by the temperature change at the connection part of the thermocouple and the thermocouple.
For the existing compensation wire for the thermocouple, for example, the chinese patent with the publication number of CN204087876U, discloses a pressure-resistant and heat-insulating thermocouple compensation cable, the elastic steel frame comprises a first steel sheet and second steel sheets located at two ends of the first steel sheet, both the first steel sheet and the second steel sheet are elastic metal plates, the cross section of the second steel sheet is arc-shaped, and the arc-shaped opening of the second steel sheet faces the outer side of the first steel sheet; the two first compensation cables are arranged on two sides of the first steel sheet between the second steel sheets, and the two second compensation conductors are respectively arranged on the outer sides of the second steel sheets; the first compensation cable and the second compensation conductor are sequentially coated with a fire-resistant mica tape wrapping layer and a polyvinyl chloride outer sheath layer to form the thermocouple compensation cable, the first compensation cable is positioned at two ends of a short shaft of the thermocouple compensation cable core, and the second compensation conductor is positioned at two ends of a long shaft of the thermocouple compensation cable core.
When the utility model is used, thermal couple and measuring device need be connected to withstand voltage thermal-insulated type thermocouple compensating cable, because the thermocouple is temperature measurement element, still need be connected the structure that is used for the temperature measurement between thermocouple and the measuring device, just can realize the temperature measurement function, at this in-process, need connect compensating cable and temperature measurement line two lines between thermocouple and the measuring device, cause the cable winding together easily, take place to lay wire the confusion, influence circumstances such as experiment.
SUMMERY OF THE UTILITY MODEL
To the easy chaotic problem of prior art existence wiring, the utility model aims at providing a compensation wire for thermocouple, it has the clear advantage of wiring.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a compensation lead for a thermocouple comprises a cable core and a cladding, wherein the cladding covers the cable core, the cable core comprises a power supply wire and a temperature measuring wire, and the power supply wire is covered with a first insulating layer;
the temperature measuring lines comprise a first temperature measuring line and a second temperature measuring line, the first temperature measuring line and the second temperature measuring line are arranged in parallel, and the temperature measuring lines are coated with second insulating layers;
the cladding comprises an inner insulating layer, a shielding layer, an outer insulating layer and a sheath layer from inside to outside in sequence.
According to the technical scheme, in actual application, a worker connects the power line and the temperature measuring line to the measuring device respectively, the first temperature measuring line, the second temperature measuring line, the thermocouple and the measuring device form a closed loop, when temperature gradients exist at two ends, current can pass through the closed loop, electromotive force, namely thermoelectric force, exists between the two ends, and the electromotive force is converted into temperature readings through the measuring device.
Furthermore, connecting plates are fixed at two ends of the first temperature measuring line and the second temperature measuring line, and through holes are formed in the connecting plates.
Through the technical scheme, in actual application, the connecting plate and the through hole facilitate a worker to connect the temperature measuring line to the measuring device and the thermocouple, and the worker can observe whether the closed loop is closed or not.
Furthermore, a connecting rib is fixed between the second insulating layer on the first temperature measuring line and the second insulating layer on the second temperature measuring line.
Through the technical scheme, in actual application, the power line and the temperature measuring line of a worker are convenient to distinguish, and the situation that equipment is damaged due to connection errors is avoided.
Furthermore, a reinforcing rib is arranged in the cable core, and the power line and the temperature measuring line are distributed around the reinforcing rib.
Through the technical scheme, in the practical application, the reinforcing ribs improve the flexibility of the lead, so that the lead is not easy to break, and the data transmission efficiency and quality are ensured.
Furthermore, the reinforcing rib is made of a plurality of paired Kevlar wires.
Through the technical scheme, the Kevlar wire is low in density, high in strength, good in toughness, high-temperature resistant, easy to machine and form, 5 times as strong as steel with the same mass, only one fifth as the density of the steel, tough, wear-resistant and hard and flexible as the material, so that the wire cannot be broken even if being subjected to large tensile force in use, the good flexibility of the wire can be ensured, and the strength of the wire can be further enhanced by the aid of a plurality of Kevlar wire pairs.
Furthermore, the periphery of the reinforcing rib is filled with glass fiber filler.
Through the technical scheme, in practical application, the glass fiber filler has excellent heat resistance, the highest service temperature is 600 ℃, the heat conductivity coefficient is low, certain tensile strength is achieved, good electrical appliance insulation performance, high tensile strength and length stability are achieved, and flexibility and tensile strength of the lead are further enhanced.
Further, the power line is made of at least one stainless steel copper wire.
Through the technical scheme, in practical application, the stainless steel resists corrosion of weak corrosion media such as air, steam and water and chemical corrosion media such as acid, alkali and salt, and the normal work of the lead is ensured.
Furthermore, the sheath layer is made of a silicon rubber material.
Through the technical scheme, the silicone rubber can still keep certain flexibility, resilience and surface hardness under the high-temperature environment of more than 200 ℃, has no obvious change in mechanical property, excellent insulating property, very good corona resistance and arc resistance, no toxicity, no odor, no adhesion with human tissues, anticoagulation effect, very little reactivity to the human tissues and guarantee the safety of workers; in practical application, the silicone rubber sheath layer increases the flexibility and tensile strength of the lead again.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) through the arrangement of the temperature measuring wire, a worker only needs to connect a lead between the thermocouple and the measuring device to realize temperature measurement, so that the operation of the worker is facilitated, the materials such as a cladding and the like are saved, and the cost is reduced;
(2) furthermore, through the arrangement of the connecting plate, a worker can connect the temperature measuring line and the measuring device more conveniently, and whether the connection is closed or not can be distinguished more easily;
(3) furthermore, the arrangement of the reinforcing ribs improves the flexibility of the lead, so that the lead is not easy to break, and the transmission efficiency and quality of data are ensured.
Drawings
FIG. 1 is a schematic structural view of the present embodiment;
fig. 2 is a schematic view of the temperature measuring line in the present embodiment.
Reference numerals: 1. a cable core; 11. a power line; 111. a first insulating layer; 12. a temperature measuring line; 121. a first temperature measurement line; 122. a second temperature measurement line; 123. a connecting plate; 1231. a through hole; 124. a second insulating layer; 1241. connecting ribs; 13. reinforcing ribs; 14. a glass fiber filler; 2. a cladding layer; 21. an inner insulating layer; 22. a shielding layer; 23. an outer insulating layer; 24. a sheath layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following provides a further detailed description of the present invention with reference to the following embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.
A compensating lead for a thermocouple comprises a cable core 1 and a cladding 2, wherein the cable core 1 comprises two power wires 11 and a temperature measuring wire 12, and the temperature measuring wire 12 comprises a first temperature measuring wire 121 and a second temperature measuring wire 122; the cladding 2 sequentially comprises an inner insulating layer 21, a shielding layer 22, an outer insulating layer 23 and a sheath layer 24 from inside to outside; when the temperature measuring device is used, a worker connects the power line 11 and the temperature measuring line 12 to the measuring device respectively, the first temperature measuring line 121, the second temperature measuring line 122, the thermocouple and the measuring device form a closed loop, when temperature gradients exist at two ends, current passes through the closed loop, and at the moment, electromotive force, namely thermoelectric force, exists between the two ends, and the electromotive force is converted into temperature readings through the measuring device.
The peripheral side of each power line 11 is covered with a first insulating layer 111 for preventing the two power lines 11 from interfering with each other; the power line 11 is made of a single stainless steel wire, and the stainless steel is resistant to corrosion of weak corrosive media such as air, steam and water and chemical corrosive media such as acid, alkali and salt, so that the normal work of the lead is ensured.
The connecting plates 123 are fixedly connected to two ends of the first temperature measuring line 121 and the second temperature measuring line 122, through holes 1231 are formed in the connecting plates 123, the connecting plates 123 and the through holes 1231 facilitate workers to connect the temperature measuring lines 12 to the thermocouples and the measuring devices, and the workers can conveniently judge whether the closed loop is closed, so that the situations such as short circuit are avoided; the first temperature measurement line 121 and the second temperature measurement line 122 are coated with a second insulating layer 124 on the periphery side to prevent the first temperature measurement line 121 and the second temperature measurement line 122 from interfering with each other; a connecting rib 1241 is fixed between the second insulating layer 124 of the first temperature measuring line 121 and the second insulating layer 124 of the second temperature measuring line 122, so that the worker can distinguish the power line 11 from the temperature measuring line 12.
The cable core 1 also comprises a reinforcing rib 13, the two power lines 11 and the temperature measuring line 12 are distributed around the reinforcing rib 13, and the reinforcing rib 13 is made of two paired Kevlar wires, so that the flexibility and the strength of the wire are improved, and the data transmission efficiency and the data transmission quality are ensured; the peripheral sides of the reinforcing ribs 13 are filled with glass fiber fillers 14 for increasing the flexibility and tensile strength of the lead.
The inner insulating layer 21 is made of a Polytetrafluoroethylene (PTFE) layer, and the PTFE has the characteristics of acid and alkali resistance, various organic solvents resistance, high temperature resistance and the like, and has the advantages of irradiation resistance and lower permeability, so that the service life of the cable is prolonged; the shielding layer 22 is made of a silver-plated copper wire braided mesh layer, the silver-plated copper wire is formed by plating silver on high-quality oxygen-free copper or drawing, and the cable has excellent electrical conductivity, thermal conductivity, corrosion resistance and high-temperature oxidation resistance, and can improve the data transmission efficiency of the cable.
The outer insulating layer 23 is made of soluble Polytetrafluoroethylene (PFA), PFA plastic is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene, the long-term use temperature is-196 to-260 ℃, the electric performance is good, the electric insulation is not affected by the temperature, the tensile strength is high, the elongation can reach 100-300%, the dielectricity is good, and the service life of the cable is prolonged due to the use of the PFA; the sheath layer 24 is made of silicon rubber, the silicon rubber can still keep certain flexibility, rebound resilience and surface hardness under the high-temperature environment of more than 200 ℃, the mechanical property is not obviously changed, the sheath layer has excellent insulating property, and the flexibility and the tensile strength of the lead are increased again.
When the device is used, a worker connects the connecting plates 123 at the two ends of the power line 11 and the two ends of the temperature measuring line 12 to the thermocouple and the measuring device respectively to check whether the connection is closed or not, and then the device is electrified and measured after the check is finished.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A compensation lead for a thermocouple comprises a cable core (1) and a cladding (2), wherein the cladding (2) coats the cable core (1), and is characterized in that the cable core (1) comprises a power supply wire (11) and a temperature measuring wire (12), and the power supply wire (11) is coated with a first insulating layer (111);
the temperature measuring lines (12) comprise a first temperature measuring line (121) and a second temperature measuring line (122), the first temperature measuring line (121) and the second temperature measuring line (122) are arranged in parallel, and the temperature measuring lines (12) are wrapped with a second insulating layer (124);
the cladding (2) comprises an inner insulating layer (21), a shielding layer (22), an outer insulating layer (23) and a sheath layer (24) from inside to outside in sequence.
2. The compensating lead for the thermocouple according to claim 1, wherein a connecting plate (123) is fixed at each of two ends of the first temperature measuring wire (121) and the second temperature measuring wire (122), and a through hole (1231) is formed in the connecting plate (123).
3. The compensating lead for a thermocouple according to claim 2, characterized in that a connecting rib (1241) is fixed between the second insulating layer (124) on the first temperature measuring wire (121) and the second insulating layer (124) on the second temperature measuring wire (122).
4. The compensating lead for the thermocouple according to claim 1, characterized in that a reinforcing rib (13) is arranged in the cable core (1), and the power supply wire (11) and the temperature measuring wire (12) are distributed around the reinforcing rib (13).
5. The compensating lead for a thermocouple according to claim 4, wherein the reinforcing rib (13) is made of a plurality of paired Kevlar wires.
6. The compensating lead for a thermocouple according to claim 4, wherein the reinforcing rib (13) is circumferentially filled with a glass fiber filler (14).
7. A compensating conductor for thermocouples as claimed in claim 1, characterized in that the supply line (11) is made of at least one stainless steel wire.
8. The compensating lead for the thermocouple according to claim 1, wherein the sheath layer (24) is made of silicon rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921159149.9U CN209843285U (en) | 2019-07-20 | 2019-07-20 | Compensating lead for thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921159149.9U CN209843285U (en) | 2019-07-20 | 2019-07-20 | Compensating lead for thermocouple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209843285U true CN209843285U (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921159149.9U Active CN209843285U (en) | 2019-07-20 | 2019-07-20 | Compensating lead for thermocouple |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114334253A (en) * | 2022-01-25 | 2022-04-12 | 远东电缆有限公司 | Heat tracing cable and preparation method and application thereof |
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2019
- 2019-07-20 CN CN201921159149.9U patent/CN209843285U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114334253A (en) * | 2022-01-25 | 2022-04-12 | 远东电缆有限公司 | Heat tracing cable and preparation method and application thereof |
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