CN-224231125-U - Frock is used in noble metal thermocouple examination and examination stove thereof

CN224231125UCN 224231125 UCN224231125 UCN 224231125UCN-224231125-U

Abstract

The utility model discloses a tool for calibrating a noble metal thermocouple and a calibration furnace thereof, and relates to the technical field of noble metal thermocouple calibration. The tool for noble metal thermocouple verification comprises an insulating tube sleeve and a central insulating tube, wherein a through insulating tube channel is formed in the insulating tube sleeve, one end of the insulating tube sleeve forms a measuring end, a plurality of reference ends are formed on an outer ring surface, a first coupling wire channel is formed in the measuring end, a second coupling wire channel is formed in each reference end, coupling wire grooves are formed in the outer ring surface, which is positioned between the measuring end and the reference end and between every two adjacent reference ends, of the insulating tube sleeve, each group of coupling wire grooves, the first coupling wire channel and the second coupling wire channel which correspond to each other are communicated with each other, the central insulating tube penetrates into the insulating tube channel, two through positive and negative standard coupling wires are arranged in the central insulating tube, and the two positive and negative standard coupling wires form a standard coupling. The tool for calibrating the noble metal thermocouple facilitates penetration and extraction of the noble metal thermocouple electrode wires with different lengths.

Inventors

ZHOU HENG
HUANG BING
ZHANG KUI

Assignees

大冶特殊钢有限公司

Dates

Publication Date: 20260512
Application Date: 20250530

Claims (9)

1. The tool for calibrating the noble metal thermocouple is characterized by comprising an insulating tube sleeve (1) and a central insulating tube (2), wherein, An insulating tube channel (11) penetrating through the insulating tube sleeve (1) along a first direction is arranged in the insulating tube sleeve (1), a measuring end (12) is formed at one end of the insulating tube sleeve (1) along the first direction, a plurality of reference ends (13) distributed along the first direction are formed on the outer ring surface of the insulating tube sleeve (1), a plurality of first wire coupling channels (12A) are formed at the measuring end (12), second wire coupling channels (13A) which are in one-to-one correspondence with the first wire coupling channels (12A) are formed at each reference end (13), a wire coupling groove (14) is formed on the outer ring surface of the insulating tube sleeve (1) between the measuring end (12) and the adjacent reference end (13) and between each two adjacent reference ends (13), the wire coupling grooves (14) extend along the first direction and correspond to the first wire coupling channels (12A), the first direction is parallel to the first wire coupling channels (12A), the wire coupling grooves (14) are formed on the outer ring surface between the measuring end (12) and the wire coupling ends (13), and the wire coupling grooves (14) are formed on the outer ring surface between the two adjacent reference ends (13), and the wire coupling grooves (14) are formed on the circumference of the wire coupling channels (1) and are in a large diameter, and the wire coupling grooves (14) are formed on the circumference of the wire coupling tube sleeve; The central insulating tube (2) is internally provided with two positive and negative standard couple electrode wires which are communicated in the axial direction of the central insulating tube, the central insulating tube (2) penetrates into the insulating tube channel (11), the two positive and negative standard couple electrode wires extend out of the measuring end (12) of the insulating tube sleeve (1) and are connected and combined at the measuring end (12) to form a standard couple (21), and meanwhile, the connecting part of the positive and negative standard couple electrode wires is formed into a standard couple measuring end (21A).
2. The tooling for calibrating the noble metal thermocouple according to claim 1, wherein the limiting mechanism comprises a plurality of limiting blocks (15) which are formed at the notch of the wire coupling groove (14) and distributed along the first direction; Every two adjacent limiting blocks (15) are installed on two sides of the notch in a staggered manner, each limiting block (15) extends along the circumferential direction of the insulating tube sleeve member (1), and the distance between one end, away from the edge of the installed notch, of each limiting block (15) and the edge of the opposite notch on the other side is larger than the diameter of a wire electrode of the noble metal thermocouple.
3. The tooling for calibrating the noble metal thermocouple according to claim 2, wherein the ratio of the distance between one end of each limiting block (15) far away from the edge of the installed notch and the edge of the opposite notch to the diameter of the electrode wire of the noble metal thermocouple is 1.5:1-2.5:1.
4. The tooling for calibrating a noble metal thermocouple according to claim 1, wherein the distance between the centerline of the first coupling wire channel (12A) and the axis of the insulating tube set (1) is smaller and smaller along the first direction, and the included angle between the centerline extension line of the first coupling wire channel (12A) and the axis of the insulating tube set (1) is in the range of 20 ° -30 °.
5. The tooling for calibrating the noble metal thermocouple according to claim 1, wherein a guide groove (11A) extending along the first direction is formed in the inner wall of the insulating tube channel (11), and a stop block (22) is mounted on the outer ring surface of the central insulating tube (2) close to the standard thermocouple measuring end (21A); When the central insulating tube (2) is in a first state, the central insulating tube (2) and the stop block (22) can slide in the guide groove (11A) in a guiding way, and when the central insulating tube (2) is in a second state, the central insulating tube (2) and the stop block (22) sliding out of the guide groove (11A) can form limit fit with the insulating tube sleeve member (1).
6. The tooling for noble metal thermocouple verification according to claim 1, further comprising a soaking cover (3), wherein, A groove (31) is formed in the bottom of the soaking cover (3), the groove (31) extends from the inner wall to the outer wall of the soaking cover (3), an annular groove (32) is formed in the inner wall of the soaking cover (3), and the annular groove (32) and the soaking cover (3) are concentrically arranged; Be provided with spacing ear (12B) on the outer anchor ring of measurement end (12), spacing ear (12B) and recess (31) one-to-one, the width of spacing ear (12B) is less than the width of recess (31), the height of spacing ear (12B) is less than the width of ring channel (32).
7. The tooling for calibrating the noble metal thermocouple according to claim 6, wherein the insulating tube sleeve (1), the central insulating tube (2) and the soaking cover (3) are all made of corundum materials.
8. The tooling for calibrating the noble metal thermocouple according to claim 1, wherein a supporting boss (13B) is arranged on the outer ring surface of each reference end (13), and the supporting boss (13B) can be matched with a detection cavity (41) in the calibrating furnace (4).
9. A noble metal thermocouple verification furnace, characterized by comprising the tool for noble metal thermocouple verification according to any one of claims 1-8, and further comprising a verification furnace body (44) and a verified noble metal thermocouple (16) installed in the tool for noble metal thermocouple verification, wherein a detection cavity (41) penetrating through the verification furnace body (44) is arranged in the verification furnace body (44).

Description

Frock is used in noble metal thermocouple examination and examination stove thereof Technical Field The utility model relates to the technical field of noble metal thermocouple verification, in particular to a tool for noble metal thermocouple verification and a verification furnace thereof. Background Currently, in thermocouple verification work, a standard thermocouple and a thermocouple to be verified are bundled together by a platinum wire, and a measuring end of the standard thermocouple and a measuring end of the thermocouple to be verified are positioned on the same end face. Before bundling, noble metal thermocouple wires with the diameter of 0.5mm are threaded into corundum insulating pipes with the aperture of less than or equal to 1mm, the outer diameter of 5mm and the length of more than or equal to 450mm one by bare hands, then platinum wires are used for bundling even wire clusters of the measuring end, the bundled thermocouple bundles are coaxially arranged in a verification furnace, the measuring end is arranged in a physical heating center of the thermocouple verification furnace, and meanwhile, after the bundled thermocouple to be verified and a reference end of a standard thermocouple are connected into a freezing point thermostat, the thermocouple wires are led out through homogeneous copper wires and are connected to a digital voltmeter or a thermocouple verification system, so that the connection operation of the verification system is completed. The technical defects of the prior art are that firstly, due to the fact that the softness of the noble metal thermocouple electrode wire and the roughness of the inner wall of a tube hole of the corundum insulating tube are affected together, the penetration of the thermocouple electrode wire into the corundum insulating tube with the length of more than or equal to 450mm by bare hands is difficult, secondly, in actual verification work, the length of a thermocouple to be verified is not uniform, meanwhile, in order to improve the verification work efficiency, a short thermocouple verification furnace is possibly needed to be adopted for simultaneously verifying a common length thermocouple and a short thermocouple, the common length corundum insulating tube and the short corundum insulating tube are needed to be combined and bound, inconvenience is brought to binding of the corundum insulating tube due to the fact that binding constraint positions of binding are different, and thirdly, due to the fact that the special property of the noble metal thermocouple is adopted, platinum wire is needed to be used for binding of the corundum insulating tube entering the furnace, binding of a noble metal thermocouple measuring end and binding constraint of the insulating tube in the furnace, and therefore the consumption cost of platinum wire exists in actual work. Disclosure of utility model The utility model aims to provide a tool for calibrating a noble metal thermocouple and a calibrating furnace thereof, so as to solve the problems in the background technology. In order to achieve the aim, the tool for calibrating the noble metal thermocouple comprises an insulating tube sleeve and a central insulating tube, wherein an insulating tube channel penetrating through the insulating tube sleeve along a first direction is arranged in the insulating tube sleeve, a measuring end is formed at one end of the insulating tube sleeve along the first direction, a plurality of reference ends distributed along the first direction are formed on an outer annular surface of the insulating tube sleeve, a plurality of first even wire channels are formed at the measuring end, second even wire channels which are in one-to-one correspondence with the first even wire channels are formed at each reference end, even wire grooves are formed in the insulating tube sleeve between the measuring end and adjacent reference ends thereof and on an outer annular surface between every two adjacent reference ends, and extend along the first direction and are in one-to-one correspondence with the first even wire channels, and the first direction is parallel to the axis direction of the insulating tube sleeve; each group of corresponding wire coupling grooves, a first wire coupling channel and a second wire coupling channel are mutually communicated, the width of a notch of each wire coupling groove in the circumferential direction of the insulating tube sleeve is larger than the diameter of an electrode wire of a noble metal thermocouple, a limiting mechanism for limiting the electrode wire from falling out is formed in each wire coupling groove, two positive and negative standard wire coupling electrodes penetrating in the axial direction of the central insulating tube are arranged in the central insulating tube, the central insulating tube penetrates into the insulating tube channels, the two positive and negative standard wire coupling electrodes extend out of the measuring end of th