CN219589838U

CN219589838U - Ultra-thin thermocouple for calibrating muffle furnace

Info

Publication number: CN219589838U
Application number: CN202320645138.1U
Authority: CN
Inventors: 黄珊珊; 何洲伟
Original assignee: Yuyao Jiyuan Instrument Co ltd
Current assignee: Yuyao Jiyuan Instrument Co ltd
Priority date: 2023-03-29
Filing date: 2023-03-29
Publication date: 2023-08-25
Anticipated expiration: 2033-03-29

Abstract

The utility model relates to the technical field of thermocouples, in particular to an ultrafine temperature thermocouple, which comprises: the electric coupling seat is internally provided with a supporting metal wire extending outwards along the axis; the positive electrode dipole wire and the negative electrode dipole wire are respectively provided with an insulating layer on the outer side walls of the positive electrode dipole wire and the negative electrode dipole wire, are arranged in parallel with the supporting metal wire, correspond to the free ends of the supporting metal wires and are electrically connected with each other; the metal braiding sleeve is tightly sleeved outside the supporting metal wire along the length direction, two ends of the metal braiding sleeve are fixedly connected with two ends of the supporting metal wire, and free ends of the positive electrode coupling wire and the negative electrode coupling wire penetrate through the metal braiding sleeve and extend outwards. An interlayer is formed between the inner wall of the metal braiding sleeve and the outer wall of the supporting metal wire, and the anode dipole wire and the cathode dipole wire in the interlayer can freely change the bending angle easily along with the external force applied to the metal braiding sleeve, so that the closing of a muffle furnace is not hindered, and accurate temperature data are acquired.

Description

Ultra-thin thermocouple for calibrating muffle furnace

Technical Field

The utility model relates to the technical field of thermocouples, in particular to an ultra-thin thermocouple for calibrating a muffle furnace.

Background

The existing thermocouple basically consists of two different metal wires which are packaged in a sleeve, one ends of the two wires are welded together, insulating materials are filled in the middle of the two wires, short circuits are avoided between the two metal wires, the two wires are led out to serve as measuring electrodes, the diameter of the thermocouple with the structure cannot be made small, the volume is generally larger, and the thermocouple is insensitive to the reaction of temperature change. Such relatively thick thermocouples, for example, are not easily fully calibrated in the muffle, and are limited by space within the muffle, which can result in the muffle door not being closed and thus affecting the measured temperature.

Disclosure of Invention

The utility model provides an ultra-thin thermocouple for calibrating a muffle furnace, wherein an interlayer is formed between the inner wall of a metal braiding sleeve and the outer wall of a supporting metal wire, and a positive electrode coupling wire and a negative electrode coupling wire arranged in the interlayer can freely change the bending angle along with the external force applied to the metal braiding sleeve, so that the muffle furnace is not hindered from closing a door, and accurate temperature data are acquired.

In order to achieve the above purpose, the present utility model provides the following technical solutions: an ultra-fine temperature thermocouple, comprising: the electric coupling seat is provided with a channel cylinder structure as an axis, and a supporting metal wire extending outwards along the axis is arranged in the electric coupling seat; the positive electrode dipole wire and the negative electrode dipole wire are respectively provided with an insulating layer on the outer side walls of the positive electrode dipole wire and the negative electrode dipole wire, extend outwards from the inside of the electric dipole seat and are arranged in parallel with the supporting metal wire, and the positive electrode dipole wire and the negative electrode dipole wire are electrically connected with each other corresponding to the free ends of the supporting metal wire; the metal braiding sleeve is tightly sleeved outside the supporting metal wire along the length direction, two ends of the metal braiding sleeve are fixedly connected with two ends of the supporting metal wire, and the free ends of the positive electrode coupling wire and the negative electrode coupling wire penetrate through the metal braiding sleeve and extend outwards; and one end of the high-temperature wire is provided with a plug, and the other end of the high-temperature wire extends into the thermocouple seat and is electrically connected with the positive electrode dipole wire and the negative electrode dipole wire respectively.

Preferably, the positive electrode dipole wire, the negative electrode dipole wire and the supporting metal wire are wound and fixed through asbestos wires.

Preferably, the positive electrode coupling wire is a platinum wire, and the negative electrode coupling wire is a platinum rhodium alloy wire.

Preferably, a quartz glass tube is sleeved at one end of the positive electrode dipole wire and one end of the negative electrode dipole wire, which are positioned in the electric coupling seat.

Preferably, the metal braiding sleeve and the supporting metal wires are made of the same material, and the two corresponding ends are fixedly connected through welding.

The utility model has the beneficial effects that: the supporting metal wire supports the metal braiding sleeve, an interlayer is formed between the inner wall of the metal braiding sleeve and the outer wall of the supporting metal wire, and the anode dipole wire and the cathode dipole wire arranged in the interlayer can freely change the bending angle along with the external force applied to the metal braiding sleeve, especially when the muffle furnace is calibrated, the muffle furnace door cannot be supported to prevent the door from closing, so that the accurate temperature in the muffle furnace can be accurately acquired. The asbestos silk thread forms a protective layer with thickness outside the positive electrode even thread, the negative electrode even thread and the supporting metal, and in the repeated bending process of the metal braiding sleeve, the short circuit problem caused by repeated friction between the insulating layers of the positive electrode even thread and the negative electrode even thread and the metal braiding sleeve is avoided, so that the reliability of temperature acquisition is further improved, and the service life of the temperature acquisition is further prolonged. In addition, after the metal braiding sleeve is stretched, the inner wall of the metal braiding sleeve is tightly attached to the axis direction, so that the positive electrode dipole wire, the negative electrode dipole wire and the supporting metal wire can be tightly held, and the temperature measuring part has a smaller outer diameter.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the inner cross-section of the metal braiding of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

According to the figures 1 and 2, a superfine thermocouple for temperature measurement comprises: the electric coupling seat 1 is provided with a channel cylinder structure by taking the electric coupling seat 1 as an axle center, and a supporting metal wire 2 extending outwards along the axle center is arranged in the electric coupling seat 1; the positive electrode dipole wire 3 and the negative electrode dipole wire 4 are respectively provided with an insulating layer on the outer side walls of the positive electrode dipole wire 3 and the negative electrode dipole wire 4, the positive electrode dipole wire 3 and the negative electrode dipole wire 4 extend outwards through the inside of the electric coupling seat 1 and are arranged in parallel with the supporting metal wire 2, and the positive electrode dipole wire 3 and the negative electrode dipole wire 4 are electrically connected with each other corresponding to the free ends of the supporting metal wire 2; the metal braiding sleeve 5 is tightly sleeved outside the supporting metal wire 2 along the length direction, two ends of the metal braiding sleeve 5 are fixedly connected with two ends of the supporting metal wire 2, and the free ends of the positive electrode coupling wire 3 and the negative electrode coupling wire 4 penetrate through the metal braiding sleeve 5 and extend outwards; and one end of the high-temperature wire 6 is provided with a plug 7, and the other end extends into the electric coupling seat 1 and is electrically connected with the positive electrode coupling wire 3 and the negative electrode coupling wire 4 respectively. The positive electrode coupling wire 3 is a platinum wire, and the negative electrode coupling wire 4 is a platinum rhodium alloy wire.

In the above-mentioned setting, support wire 2 supports metal braiding cover 5, forms the intermediate layer between metal braiding cover 5 inner wall and the support wire 2 outer wall simultaneously, and the positive pole dipole wire 3 and the negative pole dipole wire 4 that set up in this intermediate layer can be free change bending angle with the external force that metal braiding cover 5 received easily, especially when correcting the muffle, can not the muffle door cause the support, hinder the closing door, therefore accurate temperature in the acquisition muffle that can be accurate.

In addition, the positive electrode dipole wire 3, the negative electrode dipole wire 4 and the supporting metal wire 2 are fixed by winding asbestos wires 8. Through this setting, the asbestos silk 8 line is at anodal even silk 3 with negative pole even silk 4 and support the outside protective layer that forms of metal has thickness, in the repeated crooked in-process of metal braided sleeve 5, avoid anodal even silk 3 and negative pole even silk 4 insulating layer and metal braided sleeve 5 to rub repeatedly and cause the short circuit problem, consequently further improved reliability and the life of temperature acquisition.

And one end of the positive electrode dipole wire 3 and one end of the negative electrode dipole wire 4, which are positioned in the electric coupling seat 1, are sleeved with a quartz glass tube 9. The metal braiding sleeve 5 and the supporting metal wires 2 are made of the same material, and the corresponding two ends are fixedly connected through welding.

By this arrangement, after the metal braid 5 is stretched, the inner wall thereof is tightly attached to the axial direction, so that the positive electrode coupling wire 3, the negative electrode coupling wire 4 and the supporting metal wire 2 can be tightly held together, and the temperature measuring part is made to have a smaller outer diameter.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. An ultra-fine temperature thermocouple, comprising:

the electric coupling seat is provided with a channel cylinder structure as an axis, and a supporting metal wire extending outwards along the axis is arranged in the electric coupling seat;

the positive electrode dipole wire and the negative electrode dipole wire are respectively provided with an insulating layer on the outer side walls of the positive electrode dipole wire and the negative electrode dipole wire, extend outwards from the inside of the electric dipole seat and are arranged in parallel with the supporting metal wire, and the positive electrode dipole wire and the negative electrode dipole wire are electrically connected with each other corresponding to the free ends of the supporting metal wire;

the metal braiding sleeve is tightly sleeved outside the supporting metal wire along the length direction, two ends of the metal braiding sleeve are fixedly connected with two ends of the supporting metal wire, and the free ends of the positive electrode coupling wire and the negative electrode coupling wire penetrate through the metal braiding sleeve and extend outwards;

and one end of the high-temperature wire is provided with a plug, and the other end of the high-temperature wire extends into the thermocouple seat and is electrically connected with the positive electrode dipole wire and the negative electrode dipole wire respectively.

2. The ultra-fine temperature thermocouple of claim 1, wherein: the positive electrode dipole wire, the negative electrode dipole wire and the supporting metal wire are fixed through asbestos silk winding.

3. The ultra-fine temperature thermocouple of claim 1, wherein: the positive electrode coupling wire is a platinum wire, and the negative electrode coupling wire is a platinum-rhodium alloy wire.

4. The ultra-fine temperature thermocouple of claim 1, wherein: and one end of the positive electrode dipole wire and one end of the negative electrode dipole wire, which are positioned in the electric coupling seat, are sleeved with quartz glass tubes.

5. The ultra-fine temperature thermocouple of claim 1, wherein: the metal braiding sleeve and the supporting metal wires are made of the same material, and the two corresponding ends are fixedly connected through welding.