CN215492120U

CN215492120U - Double-thermocouple sensor

Info

Publication number: CN215492120U
Application number: CN202121348710.5U
Authority: CN
Inventors: 文东海; 杨亚斐; 徐伟; 李渝东
Original assignee: Chongqing Nanpaike Instrument Technology Co ltd
Current assignee: Chongqing Nanpaike Instrument Technology Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2022-01-11
Anticipated expiration: 2031-06-17

Abstract

The utility model particularly discloses a double-thermocouple sensor which comprises a K-index thermocouple wire, a C-index thermocouple wire, a shell, a K compensation lead and a C compensation lead, wherein the K-index thermocouple wire is arranged on the shell; the center of the shell is provided with a through hole along the length direction; the front end of the shell is provided with an external thread; a hexagonal nut is arranged at the rear end of the shell; the K-index thermocouple wires and the C-index thermocouple wires penetrate into the through holes of the shell respectively, and are distributed side by side at intervals; high-temperature glue is filled in the through hole of the shell and used for fixing the K-index coupling wire, the C-index coupling wire, the K compensation lead and the C compensation lead; one end of the K-index thermocouple wire is provided with a welding spot and extends out of the front end of the shell, and the other end of the K-index thermocouple wire is welded with the K compensation lead and led out of the rear end of the shell; one end of the C-index couple wire is provided with a welding spot and extends out of the front end of the shell, and the other end of the C-index couple wire is welded with the C-compensation lead and led out of the rear end of the shell. The utility model can measure high and low temperature simultaneously and improve the response time of thermocouple temperature measurement.

Description

Double-thermocouple sensor

Technical Field

The utility model belongs to the technical field of thermocouples, and particularly relates to a double-thermocouple sensor.

Background

The thermocouple (thermocouple) is a commonly used temperature measuring element in a temperature measuring instrument, directly measures temperature, converts a temperature signal into a thermal electromotive force signal, and converts the thermal electromotive force signal into the temperature of a measured medium through an electric instrument (secondary instrument).

The basic principle of thermocouple temperature measurement is that two material conductors with different components form a closed loop, when temperature gradients exist at two ends, current passes through the loop, and electromotive force, namely thermoelectric force, exists between the two ends, so-called Seebeck effect (Seebeck effect). The homogeneous conductors of the two different compositions are hot electrodes, the end with the higher temperature being the working end and the end with the lower temperature being the free end, which is usually at some constant temperature. According to the functional relation between the thermoelectromotive force and the temperature, a thermocouple graduation table is manufactured; the scores were obtained at a free end temperature of 0 ℃ with different thermocouples having different scores.

The compensating lead is a pair of insulated leads having the same nominal value as the thermoelectromotive force of the matched thermocouple in a certain temperature range (0-100 ℃), and the thermocouple and the measuring device are connected by the insulated leads so as to compensate the error generated by the temperature change at the connection part of the thermocouple and the thermocouple. A special wire for extending the cold end of thermocouple to the place far from high temp. and where its temp. is stable.

In the prior art, each division number thermocouple is produced independently, cannot test at high and low temperatures simultaneously, and has overlong response time.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a double-thermocouple sensor to solve the problem that high and low temperature can not be simultaneously tested in the prior art.

In order to achieve the purpose, the technical scheme of the utility model is as follows: a double thermocouple sensor comprises a K-index thermocouple wire, a C-index thermocouple wire, a shell, a K compensation lead and a C compensation lead;

the center of the shell is provided with a through hole along the length direction; the front end of the shell is provided with external threads for fixing the double thermocouple sensors; the rear end of the shell is provided with a hexagonal nut which is used for screwing the double thermocouple sensors when the double thermocouple sensors are fixed;

the K-index even wire and the C-index even wire penetrate into the through hole of the shell respectively, and are distributed at intervals side by side; high-temperature glue is filled in the through hole of the shell and used for fixing the K-index couple wire, the C-index couple wire, the K compensation lead and the C compensation lead;

one end of the K-index thermocouple wire is provided with a welding spot and extends out of the front end of the shell, and the other end of the K-index thermocouple wire is welded with the K compensation lead and led out of the rear end of the shell; one end of the C-index thermocouple wire is provided with a welding spot and extends out of the front end of the shell, and the other end of the C-index thermocouple wire is welded with the C-compensation lead and led out of the rear end of the shell.

Further, the diameter of the K-index couple wire is 0.2 mm; the diameter of the C-index coupling wire is 0.2 mm.

Further, the diameter of the welding spot of the K-index thermocouple wire is less than 0.5 mm; the diameter of the welding point of the C-index thermocouple wire is less than 0.5 mm.

Furthermore, the part of the K-index couple wire extending out of the front end of the shell is in a semi-ellipse shape, the length is 6-7mm, and the width is 3-5 mm; the part of the C-index thermocouple wire extending out of the front end of the shell is oval, the length is 6-7mm, and the width is 3-5 mm.

Further, the diameter of the external thread at the front end of the shell is 12 mm.

Further, the lengths of the K compensation lead and the C compensation lead are both two meters.

The beneficial effects of this technical scheme lie in: the utility model can measure high and low temperature simultaneously and improve the response time of thermocouple temperature measurement; the structure is simplified, the product yield is improved, and the use is convenient.

Drawings

FIG. 1 is a schematic structural view of a dual thermocouple sensor according to the present invention;

FIG. 2 is a schematic structural diagram of a dual thermocouple sensor according to the present invention;

fig. 3 is a schematic structural diagram of a housing of a dual thermocouple sensor according to the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: 1. k indexing the coupling wire; 2. c, indexing the coupling wire; 3. a housing; 4. k compensating the wire; 5. c compensating the wire.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiments are substantially as shown in figures 1 to 3 of the accompanying drawings: a double thermocouple sensor comprises a K-index thermocouple wire 1, a C-index thermocouple wire 2, a shell 3, a K compensation lead 4 and a C compensation lead 5; the center of the shell 3 is provided with a through hole along the length direction; the front end of the shell 3 is provided with external threads for fixing the double thermocouple sensors; a hexagonal nut is arranged at the rear end of the shell 3 and used for screwing the double thermocouple sensors when the double thermocouple sensors are fixed; the K-scale couple wire 1 and the C-scale couple wire 2 respectively penetrate into the through hole of the shell 3, and the K-scale couple wire 1 and the C-scale couple wire 2 are distributed side by side at intervals; high-temperature glue is filled in the through hole of the shell 3 and is used for fixing the K-index thermocouple wire 1, the C-index thermocouple wire 2, the K compensation lead 4 and the C compensation lead 5; one end of the K-index thermocouple wire 1 is provided with a welding spot and extends out of the front end of the shell 3, and the other end of the K-index thermocouple wire is welded with the K compensation lead 4 and led out of the rear end of the shell 3; one end of the C-scale couple wire 2 is provided with a welding spot and extends out of the front end of the shell 3, and the other end of the C-scale couple wire is welded with the C compensation lead 5 and led out of the rear end of the shell 3.

Specifically, the diameter of the K-index thermocouple wire 1 is 0.2mm, and the diameter of the C-index thermocouple wire 2 is 0.2 mm; the diameter of a welding spot of the K-index thermocouple wire 1 is less than 0.5mm, the welding spot of the K-index thermocouple wire 1 is aligned with the end point of the thermocouple wire, the welding spot is directly melted and welded, and the welding spot is firm; the diameter of the welding spot of the C-index thermocouple wire 2 is less than 0.5mm, the welding spot of the C-index thermocouple wire 2 is aligned with the end point of the thermocouple wire, the welding spot is directly melted and welded, and the welding spot is firm; the part of the K-index thermocouple wire 1 extending out of the front end of the shell 3 is in a semi-ellipse shape, the length is 6-7mm, and the width is 3-5 mm; the part of the C-scale couple wire 2 extending out of the front end of the shell 3 is oval, the length is 6-7mm, and the width is 3-5 mm; the diameter of the external thread at the front end of the shell 3 is 12 mm; the length of the K compensation wire 4 and the C compensation wire 5 are both two meters.

Specifically, the couple wire and the compensation wire are insulated from the shell, and a ceramic sleeve or a heat-shrinkable tube is sleeved at the welding position of the compensation wire and the couple wire for insulation.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A dual thermocouple sensor, characterized by: the device comprises a K-index thermocouple wire, a C-index thermocouple wire, a shell, a K compensation lead and a C compensation lead;

2. The dual thermocouple sensor of claim 1, wherein: the diameter of the K-index coupling wire is 0.2 mm; the diameter of the C-index coupling wire is 0.2 mm.

3. The dual thermocouple sensor of claim 1, wherein: the diameter of the welding spot of the K-index thermocouple wire is less than 0.5 mm; the diameter of the welding point of the C-index thermocouple wire is less than 0.5 mm.

4. The dual thermocouple sensor of claim 1, wherein: the part of the K-index thermocouple wire extending out of the front end of the shell is in a semi-ellipse shape, the length is 6-7mm, and the width is 3-5 mm; the part of the C-index thermocouple wire extending out of the front end of the shell is oval, the length is 6-7mm, and the width is 3-5 mm.

5. The dual thermocouple sensor of claim 1, wherein: the diameter of the external thread at the front end of the shell is 12 mm.

6. The dual thermocouple sensor of claim 1, wherein: the length of the K compensation conducting wire and the length of the C compensation conducting wire are both two meters.