Clamp for thermocouple calibration

Abstract

The utility model relates to the technical field of measurement and detection, and discloses a clamp for thermocouple calibration, which comprises a clamping frame and an elastic connecting assembly. In the application, the standard thermocouple can be clamped and fixed through the two main clamping plates, and the calibration thermocouple can be clamped and fixed through cooperation of the first auxiliary clamping plate and the second auxiliary clamping plate, so that the standard thermocouple and the calibration thermocouple are fixed at intervals, calibration data abnormity caused by short circuit is avoided, and calibration precision is improved.

Description

Technical Field

[0001] The present application relates to the field of metrology and detection technology, for example, to a fixture for thermocouple calibration. Background Art

[0002] At present, thermocouples are commonly used temperature measuring elements in temperature measuring instruments. They directly measure temperature and convert temperature signals into thermoelectric potential signals, which are then converted into the temperature of the measured medium through electrical instruments. Thermocouples have the advantages of simple structure, convenient manufacturing, wide measurement range, high measurement accuracy, and convenient long-distance transmission of output signals. Therefore, they are widely used in temperature measurement in various industries. Thermocouple calibration is an important means to verify whether thermocouples meet the requirements of use.

[0003] There is a device for thermocouple calibration in the related art, which is characterized by comprising: a binding wire made of a high-temperature resistant metal material and used to bind a standard thermocouple and a calibrated thermocouple together.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] The outer protective ceramic tube of the thermocouple is composed of sections of porcelain beads, with gaps between two sections of porcelain beads. Due to the small diameter of the metal wire, the metal wire can easily pass through the gap between the two sections of porcelain beads during the calibration process and come into contact with the thermocouple wire, causing a short circuit and reducing the accuracy of the calibration.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiment of the present disclosure provides a fixture for thermocouple calibration to avoid calibration data abnormality caused by short circuit and improve calibration accuracy.

[0009] In some embodiments, a fixture for thermocouple calibration includes a clamping frame and an elastic connection component. There are two clamping frames, and the two clamping frames are symmetrical to each other. A main clamping plate is provided on the two opposite side walls of the two clamping frames, and the two main clamping plates jointly enclose a main clamping opening; a first auxiliary clamping plate and a second auxiliary clamping plate are provided on the inner side of each clamping frame, and the first auxiliary clamping plate and the second auxiliary clamping plate are arranged opposite to each other to jointly enclose an auxiliary clamping opening, and the second auxiliary clamping plate and its corresponding clamping frame are telescopically connected to adjust the size of the auxiliary clamping opening; an elastic connecting component is arranged between the two clamping frames, one end of which is connected to a side wall of one of the clamping frames, and the other end is connected to a side wall of the other clamping frame, so that the two clamping frames are clamped to each other; wherein, the main clamping opening is used to place a standard thermocouple, and the auxiliary clamping opening is used to place a calibration thermocouple, when the standard thermocouple is placed in the main clamping opening, the two main clamping plates clamp the standard thermocouple under the action of the elastic connecting component, and when the calibration thermocouple is placed in the auxiliary clamping opening, the telescopic position of the second auxiliary clamping plate is adjusted to clamp the calibration thermocouple.

[0010] Optionally, a connecting hole is provided in the middle of each second auxiliary clamping plate; a threaded hole is provided on each clamping frame, and each threaded hole is arranged corresponding to a connecting hole; wherein each threaded hole is connected to a corresponding connecting hole by a bolt, the bolt is connected to the threaded hole by a thread, and the bolt passes through the connecting hole and is movably connected to the connecting hole; a limiting plate and an anti-slip plate are provided on each bolt, the limiting plate is located on one side of the second auxiliary clamping plate along the axial direction of the bolt, and the anti-slip plate is located on the other side of the second auxiliary clamping plate along the axial direction of the bolt.

[0011] Optionally, along the axial direction of the bolt, the spacing between the limiting plate and the anti-dropping plate on each bolt is greater than the length of the connecting hole, and less than or equal to twice the length of the connecting hole.

[0012] Optionally, the lengths of the limiting plate and the anti-dropping plate on each bolt along a direction perpendicular to the axis of the bolt are both greater than the diameter of the connecting hole and less than or equal to three times the diameter of the connecting hole.

[0013] Optionally, a plurality of first auxiliary clamping plates and a plurality of second auxiliary clamping plates are provided on the inner side of each clamping frame, and a first auxiliary clamping plate is arranged opposite to a second auxiliary clamping plate, thereby enclosing a plurality of auxiliary clamping openings on the inner side of each clamping frame.

[0014] Optionally, the plurality of first auxiliary clamping plates on the inner side of each clamping frame are fixedly connected to the corresponding main clamping plate via a fixing plate.

[0015] Optionally, every two adjacent first auxiliary clamping plates are connected by a first connecting plate.

[0016] Optionally, the elastic connection assembly includes: a spring. There are multiple springs, all arranged between the two opposite side walls of the two clamping frames, one end of each spring is connected to the side wall of one of the clamping frames, and the other end is connected to the side wall of the other clamping frame, and the multiple springs are symmetrically distributed on both sides of the main clamping opening.

[0017] Optionally, the main clamping plate is an arc-shaped plate structure.

[0018] The fixture for thermocouple calibration provided by the embodiment of the present disclosure can achieve the following technical effects:

[0019] Place the standard thermocouple at the main clamping port, and use the elastic connection component to provide elastic force to bring the two clamping frames closer to each other, and then the two main clamping plates clamp the standard thermocouple. Then put the calibration thermocouple into the auxiliary clamping port, adjust the relative position of the corresponding second auxiliary clamping plate and the clamping frame, and then cooperate with the corresponding first auxiliary clamping plate to clamp the calibration thermocouple, and then fix the standard thermocouple and the calibration thermocouple. The two main clamping plates clamp and fix the standard thermocouple, and the first auxiliary clamping plate and the second auxiliary clamping plate cooperate to clamp and fix the calibration thermocouple, so that the standard thermocouple and the calibration thermocouple are fixed at intervals to avoid calibration data abnormalities caused by short circuits and improve calibration accuracy.

[0020] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0022] Figure 1 is a schematic structural diagram of a fixture for thermocouple calibration provided by an embodiment of the present disclosure;

[0023] Figure 2 is a left side view of a fixture for thermocouple calibration provided by an embodiment of the present disclosure;

[0024] Figure 3 The embodiment of the present disclosure provides Figure 1 Enlarged view of point A in the middle;

[0025] Figure 4 It is a structural schematic diagram of the cooperation between a first auxiliary clamping plate and a second connecting plate provided in an embodiment of the present disclosure.

[0026] Reference numerals:

[0027] 100, clamping frame; 110, main clamping plate; 120, main clamping opening; 130, first auxiliary clamping plate; 140, second auxiliary clamping plate; 141, connecting hole; 150, auxiliary clamping opening; 160, threaded hole; 200, elastic connecting assembly; 210, spring; 300, bolt; 310, limit plate; 320, anti-drop plate; 400, fixing plate; 500, first connecting plate; 600, second connecting plate. DETAILED DESCRIPTION

[0028] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0029] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0030] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0031] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0032] Unless otherwise stated, the term "plurality" means two or more.

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0034] Combination Figure 1-3 As shown, the embodiment of the present disclosure provides a fixture for thermocouple calibration, including: a clamping frame 100 and an elastic connection assembly 200. There are two clamping frames 100, and the two clamping frames 100 are symmetrical to each other. A main clamping plate 110 is provided on the two opposite side walls of the two clamping frames 100, and the two main clamping plates 110 jointly enclose a main clamping opening 120; a first auxiliary clamping plate 130 and a second auxiliary clamping plate 140 are provided on the inner side of each clamping frame 100, and the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 are arranged opposite to each other to jointly enclose an auxiliary clamping opening 150, and the second auxiliary clamping plate 140 and its corresponding clamping frame 100 are telescopically connected to adjust the size of the auxiliary clamping opening 150; the elastic connection assembly 200 is arranged on the two One end is connected to a side wall of one of the clamping frames 100, and the other end is connected to a side wall of the other clamping frame 100, so that the two clamping frames 100 are clamped together; wherein, the main clamping port 120 is used to place a standard thermocouple, and the auxiliary clamping port 150 is used to place a calibration thermocouple. When the standard thermocouple is placed in the main clamping port 120, the two main clamping plates 110 clamp the standard thermocouple under the action of the elastic connection component 200. When the calibration thermocouple is placed in the auxiliary clamping port 150, the telescopic position of the second auxiliary clamping plate 140 is adjusted to clamp the calibration thermocouple.

[0035] By using the fixture for thermocouple calibration provided by the embodiment of the present disclosure, the standard thermocouple can be placed at the main clamping port 120, and the elastic connection component 200 provides elastic force to make the two clamping frames 100 approach each other, and the two main clamping plates 110 then clamp the standard thermocouple. Then put the calibration thermocouple into the auxiliary clamping port 150, adjust the relative position of the corresponding second auxiliary clamping plate 140 and the clamping frame 100, and then cooperate with the corresponding first auxiliary clamping plate 130 to clamp the calibration thermocouple, and then fix the standard thermocouple and the calibration thermocouple. The two main clamping plates 110 clamp and fix the standard thermocouple, and the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 cooperate to clamp and fix the calibration thermocouple, and the standard thermocouple and the calibration thermocouple are fixed with a spacing, so as to avoid calibration data abnormalities caused by short circuits and improve the accuracy of calibration.

[0036] Optionally, the clamping frame 100, the elastic connection assembly 200, the main clamping plate 110, the first auxiliary clamping plate 130, and the second auxiliary clamping plate 140 are all made of high temperature resistant materials. In this way, the clamping frame 100, the elastic connection assembly 200, the main clamping plate 110, the first auxiliary clamping plate 130, and the second auxiliary clamping plate 140 made of high temperature resistant materials can withstand relatively high temperatures during the calibration operation, and the risk of thermal deformation and expansion in a high temperature environment is low, thereby improving the stability of clamping the standard thermocouple and the calibration thermocouple.

[0037] Optionally, the clamping frame 100, the main clamping plate 110, the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 are all made of ferritic stainless steel. In this way, the clamping frame 100, the main clamping plate 110, the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 made of ferritic stainless steel can withstand relatively high temperatures during the calibration process, and the risk of thermal deformation and expansion in a high temperature environment is low, thereby improving the stability of clamping the standard thermocouple and the calibration thermocouple and reducing interference with the calibration operation.

[0038] Optionally, the elastic connection assembly 200 is made of chrome steel material. In this way, the elastic connection assembly 200 made of chrome steel material can withstand relatively high temperatures during the calibration process of the thermocouple, and has a lower risk of thermal deformation and expansion in a high temperature environment.

[0039] Combination Figure 2 As shown, optionally, the thickness of the clamping frame 100, the main clamping plate 110, the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 are all greater than or equal to 8 mm and less than or equal to 12 mm. In this way, when the thickness of the clamping frame 100, the main clamping plate 110, the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 are all less than 8 mm, the thickness of the clamping frame 100, the main clamping plate 110, the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 are relatively thin. In the process of clamping the thermocouple, the risk of contacting the thermocouple wire through the gap between the outer protective ceramic beads of the thermocouple is high, and the risk of interfering with the calibration operation is high. In the case where the thickness of the clamping frame 100, the main clamping plate 110, the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 are all greater than 12 mm, the area in contact with the thermocouple is relatively large, causing more obstruction to the surface of the thermocouple, and the risk of interfering with the calibration operation is high. It can be seen that the thickness of the main frame, the main clamping plate 110, the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 are all greater than or equal to 8 mm, and the range of less than or equal to 12 mm is more reasonable. Not only is the contact area with the thermocouple relatively small, reducing the obstruction of the thermocouple surface, but also the risk of contact with the thermocouple wire through the gap between the outer protective ceramic beads of the thermocouple can be reduced, reducing the risk of interference with the calibration operation and improving the calibration effect.

[0040] Optionally, the thickness of the clamping frame 100, the main clamping plate 110, the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 are all 10 mm. In this way, the area of ​​contact between the clamping frame 100, the main clamping plate 110, the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 and the thermocouple is relatively small, which reduces the shielding of the thermocouple surface and the risk of contacting the thermocouple wire through the gap between the outer protective ceramic beads of the thermocouple, reduces the risk of interference with the calibration operation, and improves the calibration effect.

[0041] Combination Figure 3 As shown, optionally, a connecting hole 141 is provided in the middle of each second auxiliary clamping plate 140; a threaded hole 160 is provided on each clamping frame 100, and each threaded hole 160 is arranged corresponding to a connecting hole 141; wherein, each threaded hole 160 is connected to a corresponding connecting hole 141 via a bolt 300, the bolt 300 is connected to the threaded hole 160 via a thread, the bolt 300 passes through the connecting hole 141 and is movably connected to the connecting hole 141; each bolt 300 is provided with a limiting plate 310 and an anti-slip plate 320, the limiting plate 310 is located on one side of the second auxiliary clamping plate 140 along the axial direction of the bolt 300, and the anti-slip plate 320 is located on the other side of the second auxiliary clamping plate 140 along the axial direction of the bolt 300. In this way, by rotating the bolt 300, the bolt 300 cooperates with the threaded hole 160 to make the bolt 300 move relative to the corresponding clamping frame 100, and drive the limit plate 310 and the anti-slip plate 320 to move, and then drive the corresponding second auxiliary clamping plate 140 to move, adjust the distance between the second auxiliary clamping plate 140 and the corresponding first auxiliary clamping plate 130, and adjust the size of the corresponding auxiliary clamping port 150, so that the calibration thermocouple can be placed in the auxiliary clamping port 150 for clamping, or, release the clamping of the calibration thermocouple to take out the calibration thermocouple, making it more convenient to clamp or loosen the calibration thermocouple.

[0042] Optionally, the head of the bolt 300 is arranged on the outer side of the corresponding clamping frame 100. In this way, it is more convenient and quick to rotate the head of the bolt 300.

[0043] Specifically, the limiting piece 310 and the anti-dropping piece 320 provided on each bolt 300 are fixedly connected to the bolt 300 .

[0044] Specifically, the anti-drop sheet 320 is disposed in the corresponding auxiliary clamping opening 150 .

[0045] Optionally, along the axial direction of the bolt 300, the spacing between the limiting piece 310 and the anti-dropping piece 320 on each bolt 300 is greater than the length of the connecting hole 141, and less than or equal to twice the length of the connecting hole 141. In this way, the spacing between the limiting piece 310 and the anti-dropping piece 320 on each bolt 300 is relatively large, so that the second auxiliary clamping plate 140 can be smoothly arranged between the corresponding limiting piece 310 and the anti-dropping piece 320.

[0046] Optionally, the spacing between the limiting piece 310 and the anti-dropping piece 320 on each bolt 300 is equal to 1.5 times the length of the connecting hole 141. In this way, the spacing between the limiting piece 310 and the anti-dropping piece 320 on each bolt 300 is relatively large, so that the second auxiliary clamping plate 140 can be smoothly arranged between the corresponding limiting piece 310 and the anti-dropping piece 320.

[0047] Optionally, the length of the limiting piece 310 and the anti-dropping piece 320 on each bolt 300 along the direction perpendicular to the axis of the bolt 300 is greater than the diameter of the connecting hole 141, and less than or equal to three times the diameter of the connecting hole 141. In this way, the length of the limiting piece 310 and the anti-dropping piece 320 on each bolt 300 along the direction perpendicular to the axis of the bolt 300 is relatively long, reducing the risk of the limiting piece 310 and the anti-dropping piece 320 sliding into the connecting hole 141.

[0048] Optionally, the length of the limiting piece 310 and the anti-dropping piece 320 on each bolt 300 along the direction perpendicular to the axis of the bolt 300 is equal to twice the diameter of the connecting hole 141. In this way, the length of the limiting piece 310 and the anti-dropping piece 320 on each bolt 300 along the direction perpendicular to the axis of the bolt 300 is relatively long, reducing the risk of the limiting piece 310 and the anti-dropping piece 320 sliding into the connecting hole 141.

[0049] Optionally, a plurality of first auxiliary clamping plates 130 and a plurality of second auxiliary clamping plates 140 are provided inside each clamping frame 100, and a first auxiliary clamping plate 130 is arranged opposite to a second auxiliary clamping plate 140, thereby enclosing a plurality of auxiliary clamping openings 150 inside each clamping frame 100. In this way, a plurality of auxiliary clamping openings 150 are provided inside each clamping frame 100, and a plurality of calibration thermocouples can be clamped at one time, and a plurality of calibration thermocouples can be calibrated at the same time in one calibration operation, thereby improving the calibration efficiency and saving the time of calibrating a plurality of calibration thermocouples.

[0050] Optionally, three first auxiliary clamping plates 130 and a plurality of second auxiliary clamping plates 140 are provided inside each clamping frame 100, thereby enclosing three auxiliary clamping openings 150. In this way, three auxiliary clamping openings 150 are provided inside each clamping frame 100, and three calibration thermocouples can be clamped at one time. Two clamping frames 100 can clamp six calibration thermocouples at one time, and six calibration thermocouples can be calibrated at the same time in one calibration operation, thereby improving the calibration efficiency and saving the time of calibrating six calibration thermocouples.

[0051] Optionally, the multiple auxiliary clamping openings 150 on the inner side of each clamping frame 100 are evenly distributed around the main clamping plate 110. In this way, the multiple auxiliary clamping openings on the inner side of each clamping frame 100 are evenly distributed. When each auxiliary clamping opening clamps a calibration thermocouple, the multiple calibration thermocouples clamped are evenly spaced from each other, and the risk of mutual interference and contact is low, thereby improving the accuracy of the calibration operation.

[0052] Optionally, the plurality of first auxiliary clamping plates 130 inside each clamping frame 100 are fixedly connected to the corresponding main clamping plate 110 via a fixing plate 400. In this way, the connection stability of the first auxiliary clamping plate 130 is improved, thereby improving the clamping stability of the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 for the calibration thermocouple.

[0053] Optionally, each two adjacent first auxiliary clamping plates 130 are connected by a first connecting plate 500. In this way, the connection stability of the first auxiliary clamping plates 130 is further improved, the shaking amplitude of the first auxiliary clamping plates 130 is reduced, and the clamping stability of the first auxiliary clamping plates 130 and the second auxiliary clamping plates 140 for the calibration thermocouple is further improved.

[0054] Combination Figure 4 As shown, specifically, three first auxiliary clamping plates 130 are provided inside each clamping frame 100, wherein two first auxiliary clamping plates 130 are located at the same level and are fixedly connected to the side wall provided with the main clamping plate 110 through the second connecting plate 600, and the spacing between the first auxiliary clamping plates 130 and the side wall provided with the main clamping plate 110 is smaller than that of another first auxiliary clamping plate 130. In this way, the connection stability of the two first auxiliary clamping plates 130 close to the side wall provided with the main clamping plate 110 inside each clamping frame 100 is increased.

[0055] Optionally, the elastic connection assembly 200 includes: a spring 210. A plurality of springs 210 are provided, all of which are arranged between the two opposite side walls of the two clamping frames 100, one end of each spring 210 is connected to the side wall of one of the clamping frames 100, and the other end is connected to the side wall of the other clamping frame 100, and the plurality of springs 210 are symmetrically distributed on both sides of the main clamping opening 120. In this way, the springs 210 provide elastic force for the two clamping frames 100, and when the two main clamping plates 110 clamp the standard thermocouple in the main clamping opening 120, the plurality of springs 210 are symmetrically distributed on both sides of the main clamping opening 120, so that the elastic force distribution is more uniform, thereby improving the stability of the clamping.

[0056] Optionally, four springs 210 are provided. In this way, the number of springs 210 is relatively large, and the elastic force provided is relatively large, thereby improving the stability of the two main clamping plates 110 clamping the standard thermocouple in the main clamping port 120.

[0057] Optionally, the clamping frame 100 is a semicircular frame structure. In this way, when the main clamping opening 120 clamps the standard thermocouple and the plurality of auxiliary clamping openings 150 clamp the plurality of calibration thermocouples, the plurality of calibration thermocouples surround the standard thermocouple, so that the distance between the standard thermocouple and each calibration thermocouple is relatively uniform.

[0058] Optionally, the main clamping plate 110 is an arc-shaped plate structure. In this way, the shape of the main clamping plate 110 corresponds to the cross section of the standard thermocouple, thereby improving the stability of the main clamping plate 110 in clamping the standard thermocouple.

[0059] Specifically, the main clamping plate 110 is a semicircular groove located at the center of the clamping frame 100. In this way, the shape of the main clamping plate 110 corresponds to the cross section of the standard thermocouple, which improves the stability of the main clamping plate 110 clamping the standard thermocouple.

[0060] Optionally, the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 are both arc-shaped plate structures. The shapes of the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 correspond to the cross-section of the calibration thermocouple, thereby improving the stability of the first auxiliary clamping plate 130 and the second auxiliary clamping plate 140 in clamping the calibration thermocouple.

[0061] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A fixture for thermocouple calibration, characterized in that: include: Two clamping frames (100) are provided, and the two clamping frames (100) are symmetrical to each other. A main clamping plate (110) is provided on opposite side walls of the two clamping frames (100), and the two main clamping plates (110) jointly enclose a main clamping opening (120); a first auxiliary clamping plate (130) and a second auxiliary clamping plate (140) are provided on the inner side of each clamping frame (100), and the first auxiliary clamping plate (130) and the second auxiliary clamping plate (140) are arranged opposite to each other to jointly enclose an auxiliary clamping opening (150), and the second auxiliary clamping plate (140) and the corresponding clamping frame (100) are telescopically connected to adjust the size of the auxiliary clamping opening (150); An elastic connection component (200) is arranged between two clamping frames (100), one end of which is connected to a side wall of one of the clamping frames (100), and the other end of which is connected to a side wall of the other clamping frame (100), so that the two clamping frames (100) are clamped to each other; The main clamping opening (120) is used to place a standard thermocouple, and the auxiliary clamping opening (150) is used to place a calibration thermocouple. When the standard thermocouple is placed in the main clamping opening (120), the two main clamping plates (110) clamp the standard thermocouple under the action of the elastic connection component (200). When the calibration thermocouple is placed in the auxiliary clamping opening (150), the telescopic position of the second auxiliary clamping plate (140) is adjusted to clamp the calibration thermocouple.

2. The fixture for thermocouple calibration according to claim 1, characterized in that: A connecting hole (141) is provided in the middle of each second auxiliary clamping plate (140); Each clamping frame (100) is provided with a threaded hole (160), and each threaded hole (160) is arranged corresponding to a connecting hole (141); Each threaded hole (160) is connected to a corresponding connecting hole (141) via a bolt (300), the bolt (300) is connected to the threaded hole (160) via a thread, the bolt (300) passes through the connecting hole (141) and is movably connected to the connecting hole (141); each bolt (300) is provided with a limiting plate (310) and an anti-slip plate (320), the limiting plate (310) is located on one side of the second auxiliary clamping plate (140) along the axial direction of the bolt (300), and the anti-slip plate (320) is located on the other side of the second auxiliary clamping plate (140) along the axial direction of the bolt (300).

3. The fixture for thermocouple calibration according to claim 2, characterized in that: Along the axial direction of the bolt (300), the spacing between the limiting piece (310) and the anti-dropping piece (320) on each bolt (300) is greater than the length of the connecting hole (141) and less than or equal to twice the length of the connecting hole (141).

4. The fixture for thermocouple calibration according to claim 2, characterized in that: The lengths of the limiting piece (310) and the anti-dropping piece (320) on each bolt (300) along a direction perpendicular to the axis of the bolt (300) are both greater than the diameter of the connecting hole (141) and less than or equal to three times the diameter of the connecting hole (141).

5. The fixture for thermocouple calibration according to claim 1, characterized in that: A plurality of first auxiliary clamping plates (130) and a plurality of second auxiliary clamping plates (140) are arranged on the inner side of each clamping frame (100); a first auxiliary clamping plate (130) and a second auxiliary clamping plate (140) are arranged opposite to each other, thereby enclosing a plurality of auxiliary clamping openings (150) on the inner side of each clamping frame (100).

6. The fixture for thermocouple calibration according to claim 5, characterized in that: A plurality of first auxiliary clamping plates (130) inside each clamping frame (100) are fixedly connected to the corresponding main clamping plate (110) via a fixing plate (400).

7. The fixture for thermocouple calibration according to claim 5, characterized in that: Every two adjacent first auxiliary clamping plates (130) are connected via a first connecting plate (500).

8. The fixture for thermocouple calibration according to any one of claims 1 to 7, characterized in that: The elastic connection assembly (200) comprises: There are multiple springs (210), all of which are arranged between the two opposite side walls of the two clamping frames (100), one end of each spring (210) is connected to the side wall of one of the clamping frames (100), and the other end is connected to the side wall of the other clamping frame (100), and the multiple springs (210) are symmetrically distributed on both sides of the main clamping opening (120).

9. The fixture for thermocouple calibration according to any one of claims 1 to 7, characterized in that: The main clamping plate (110) is an arc-shaped plate structure.

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