Measuring system and thermocouple position measuring device thereof

Abstract

The utility model relates to a measuring system and a thermocouple position measuring device thereof, the thermocouple position measuring device is used for measuring the position of a thermocouple in a test piece to be measured, the thermocouple position measuring device comprises a mounting seat and a heating assembly, and the mounting seat is detachably mounted on a detection platform; the heating assembly is rotatably arranged on the mounting seat and comprises a connecting arm and a heating piece; one end of the connecting arm is rotatably mounted on the mounting seat; the heating piece is detachably arranged at the other end of the connecting arm; and the heating piece is provided with an accommodating groove for accommodating the test piece to be tested. According to the thermocouple position measuring device, the heating piece provided with the accommodating groove for accommodating the fuel rod is constructed, so that the thermocouple position measuring device can be used for heating by attaching to the test piece to be measured for heat transfer, the heating area is accurate and controllable, and the arrangement position of the thermocouple in the test piece to be measured can be more accurately measured; and the measurement deviation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of thermocouples, in particular to a measuring system and a thermocouple position measuring device thereof. Background Art

[0002] When conducting heat transfer related experiments, it is necessary to focus on the temperature value and its changing trend. The temperature change of the test piece itself is usually measured by the thermocouples set inside it. Take the nuclear power industry as an example. When conducting heat transfer experiments on fuel assemblies, in order to determine the temperature change trend of the wall, thermocouples are usually set in the heating rods of the fuel assemblies. However, due to the limited space of the heating rods and the limited number of thermocouples, it is extremely important to place the limited thermocouples in the appropriate position for the experiment. Therefore, it is essential and crucial to detect and inspect the position of the thermocouples in the heating rods before the test.

[0003] Existing inspections of buried thermocouple positions, such as heating rod thermocouples, are mostly conducted by flame heating or heat gun heating. The temperature and temperature rise rate of flame heating are difficult to control, and the large heating surface of the heat gun makes it difficult to achieve accurate measurement. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a measuring system and a thermocouple position measuring device thereof.

[0005] The utility model adopts the following technical solutions:

[0006] A thermocouple position measuring device is constructed to measure the position of a thermocouple in a test piece to be tested, the thermocouple position measuring device comprising:

[0007] A mounting base, detachably mounted on the detection platform; and

[0008] The heating component is rotatably arranged on the mounting seat, and comprises a connecting arm rotatably mounted on the mounting seat at one end and a heating element detachably arranged at the other end of the connecting arm; the heating element is provided with a receiving groove for receiving the test piece to be tested.

[0009] In some embodiments, the mounting seat is formed with a groove adapted to the detection platform, and the mounting seat is slidably disposed on the detection platform through the groove.

[0010] In some embodiments, the cross section of the receiving groove is adapted to the cross section of the test piece to be tested;

[0011] And / or, a heating element is embedded in the wall defining the accommodating groove.

[0012] In some embodiments, the heating element is detachably disposed on the connecting arm.

[0013] In some embodiments, the thermocouple position measuring device further comprises a supporting assembly for mounting the heating assembly on the mounting seat, and one end of the connecting arm is rotatably connected to the supporting assembly.

[0014] In some embodiments, the support assembly includes a support member, the support member is disposed on the mounting seat, and one end of the connecting arm is rotatably connected to the support member.

[0015] In some embodiments, the support assembly further includes a support platform, the support member is disposed on the support platform, and the support platform is detachably disposed on the mounting seat.

[0016] In some embodiments, the support member and the connecting arm are both arranged in a longitudinal direction, the support member is erected on the mounting seat, one end of the connecting arm is rotatably connected to an end of the support member away from the mounting seat, the other end of the connecting arm is bent in an L shape, and the heating element is arranged on the other end of the connecting arm.

[0017] A measurement system is constructed, comprising a detection platform and any one of the above-mentioned thermocouple position measurement devices.

[0018] In some embodiments, a guide portion is provided on the detection platform, and the mounting seat is movably provided on the guide portion.

[0019] The utility model has the following advantages:

[0020] The utility model constructs a heating element with a receiving groove for receiving a fuel rod, so that the thermocouple position measuring device can be heated by heat transfer with the test piece to be tested, and the heated area is accurate and controllable, so that the setting position of the thermocouple in the test piece to be tested can be measured more accurately, reducing the measurement deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 It is a structural schematic diagram of a thermocouple position measuring device in one embodiment of the utility model;

[0023] Figure 2 yes Figure 1The AA cross-sectional schematic diagram of the thermocouple position measurement device shown. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "up", "down", "left", "right", "vertical", "horizontal", "bottom", "inside", "inside", "outside", etc. are based on the directions or positional relationships shown in some of the drawings, and are constructed and operated in a specific direction. They are only for the convenience of describing the present technical solution, and do not indicate that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0025] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0026] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.

[0027] Figure 1 and Figure 2 The thermocouple position measuring device 1 in one embodiment of the utility model is shown. The thermocouple position measuring device 1 is arranged on a detection platform and is used to accurately measure the setting position of the thermocouple in the test piece to be tested. It can be understood that the thermocouple position measuring device 1 can also be used alone without being arranged on a thermal device.

[0028] The thermocouple position measuring device 1 includes a mounting base 10 and a heating component 20. The heating component 20 is movably arranged on the mounting base 10, and is used to heat a specific position of the test piece to be tested, so as to determine whether a thermocouple is arranged at the specific position according to the temperature change on the thermocouple display device. The mounting base 10 is detachably arranged on the detection platform, and is used to fix the position of the heating element 21, so as to avoid the shaking of the heating component 20 during the test, resulting in inaccurate test.

[0029] Specifically, a groove 11 is formed on the mounting seat 10 , and the groove 11 is used to cooperate with the detection platform so that the thermocouple position measurement device 1 can be slidably disposed on the detection platform.

[0030] The heating assembly 20 includes a heating element 21 and a connecting arm 22. One end of the connecting arm 22 is rotatably mounted on the mounting base 10, and the other end is connected to the heating element 21, so that the heating element 21 can be rotatably arranged to cooperate with the test piece to be tested. A receiving groove 211 for accommodating the test piece to be tested is formed on the heating element 21. The cross-sectional shape of the receiving groove 211 is adapted to the cross-sectional shape of the test piece to be tested, so that the test piece to be tested can be arranged in the receiving groove 211 during the test. The heating element 21 can perform targeted heating on a specific position of the test piece to be tested, and judge whether the thermocouple is in the heating position according to the display device to which the thermocouple is connected during the heating process, so as to ensure the accuracy of the test. Figure 1 As shown, in this embodiment, the test piece to be tested is a nuclear fuel rod as an example, and the receiving groove 211 of the heating element 21 is semi-cylindrical, and its cross section is semi-circular to correspond to the circular cross section of the fuel rod.

[0031] Specifically, the heating element 21 is an electric heating element. A heating element is buried in the wall defining the accommodating groove 211. During the heating process, heat is transferred between the heating element and the wall and the fuel rod to achieve the effect of heating the thermocouple, so as to effectively control the heating rate and the maximum temperature. It can be suitable for thermocouple position detection with different measurement ranges or different sensitivities.

[0032] In some other optional embodiments, the heating element 21 can also achieve the above-mentioned effect by burying a heating air gun, a heating spray gun, etc. in the wall surface corresponding to the accommodating groove 211.

[0033] It should be understood that the heating element 21 is detachably arranged on the mounting base 10 to realize the replacement of the heating element 21, so as to facilitate the replacement of the heating element 21 with a differently shaped receiving groove 211 for fuel rods (or other items to be heated) of different sizes, ensuring that the receiving groove 211 is adapted to the size of the fuel rod.

[0034] In some embodiments, the thermocouple position measurement device 1 further includes a support assembly 30 , and the support assembly 30 is used to connect the heating element 21 and the mounting seat 10 , so that the heating element 21 can be movably disposed on the mounting seat 10 .

[0035] The support assembly 30 includes a support member 31, a connecting arm 22, and a support platform 32. The support platform 32 is detachably disposed on the mounting seat 10, and the support member 31 is disposed on the support platform 32. One end of the connecting arm 22 away from the heating element 21 is rotatably connected to the support member 31 to enable the heating element 32 to move relative to the mounting seat 10.

[0036] In this embodiment, the support assembly 30 further includes a plurality of connecting bolts, and the support platform 32 is detachably arranged on the mounting base 10 through the connecting bolts. The support member 31 and the connecting arm 22 are both arranged in a longitudinal direction, and the support member 31 is vertically arranged on the support platform 32. One end of the connecting arm 22 is rotatably connected to an end of the support member 31 away from the support platform 32.

[0037] Specifically, a recessed groove is formed at one end of the support member 31 away from the support platform 32, and the recess separates one end of the support member 31 into two recessed ear plates. One end of the connecting arm 22 is accommodated in the recess. The two recessed ear plates are respectively penetrated with connection holes along the thickness direction for realizing rotatable connection with the connecting arm 22.

[0038] A connecting hole is also passed through one end of the connecting arm 22 connected to the support member 31. The support assembly 30 also includes a connecting shaft, which is simultaneously passed through the connecting holes on the two yielding ear plates of the connecting arm 22 and the support member 31, so that a rotatable connection is achieved between the support member 31 and the connecting arm 22.

[0039] In some embodiments, the other end of the connecting arm 22 is bent in an L shape, and the heating element 21 is detachably arranged on the other end of the connecting arm 22. The L-shaped structure at the end of the connecting arm 22 allows the heating element 21 to be directly buckled on the fuel rod by rotating the connecting arm 22, which facilitates assembly with the fuel rod and simplifies the installation process. At the same time, the heating element 21 is movably connected to the mounting seat 10.

[0040] It should be understood that the bending direction of the other end of the connecting arm 22 needs to enable the receiving groove 211 of the heating element 21 to be buckled on the fuel rod from above. In this embodiment, the bending direction of the other end of the connecting arm 22 is clockwise, and the setting position of the corresponding fuel rod during the test is on the right side of the thermocouple position measuring device 1 (the clockwise bending and the right side both refer to the direction indicated by the staff / the accompanying drawings). In some other optional embodiments, the bending direction of the other end of the connecting arm 22 can also be counterclockwise, and the setting position of the corresponding fuel rod during the test is on the left side of the thermocouple position measuring device 1 (the counterclockwise bending and the left side both refer to the direction indicated by the staff).

[0041] In some other optional embodiments, the support platform 32 may not be provided, and the support member 31 may be directly and detachably provided on the mounting seat 10. The support member 31 and the support platform 32 may also be integrally formed by welding or the like. The mounting seat 10, the support platform 32 and the support member 31 may also be relatively fixedly provided by integral molding, welding or the like.

[0042] The utility model also constructs a measuring system, which includes a detection platform and any one of the above-mentioned thermocouple position measuring devices 1, wherein a guide portion is provided on the detection platform, and the thermocouple position measuring device 1 is arranged on the guide portion so as to move back and forth along the extension direction of the guide portion, so as to heat any axial position of the fuel rod, so as to measure whether there is a thermocouple at any position of the fuel rod.

[0043] Specifically, in this embodiment, the guide portion is matched with the groove 11 on the thermocouple position measuring device 1, so that the groove 11 can be arranged on the guide portion to move back and forth along the guide portion. And the guiding direction of the guide portion is parallel to the setting direction of the fuel rod to be measured, so that the thermocouple position measuring device 1 can move back and forth along the axial direction parallel to the fuel rod.

[0044] In a specific use process, firstly, the relative position of the detection platform and the fuel rod to be detected needs to be set so that the guiding direction of the guide part on the detection platform is parallel to the axis of the fuel rod.

[0045] Furthermore, the thermocouple position measuring device 1 is mounted on the detection platform through the groove 11 on the mounting seat 10. The connecting arm 22 is rotated so that the receiving groove 211 of the heating element 21 is buckled on the fuel rod.

[0046] Furthermore, the heating element 21 is connected to a power source for heating, and the temperature change curve on the thermocouple display device is observed. If there is no change or the change range is not large, it proves that no thermocouple is set here.

[0047] Furthermore, the mounting seat 10 is moved along the guide portion so that the thermocouple position measuring device 1 is moved along the axis parallel to the fuel rod, and the above steps are repeated until it is detected that the temperature change of the thermocouple at a certain location is the largest, which proves that the thermocouple is set at this location.

[0048] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A thermocouple position measuring device for measuring the position of a thermocouple in a test piece to be tested, characterized in that: The thermocouple position measuring device comprises: A mounting base (10) is detachably mounted on the detection platform; and A heating assembly (20) is rotatably mounted on the mounting seat (10), comprising a connecting arm (22) rotatably mounted on the mounting seat (10) at one end and a heating element (21) detachably mounted on the other end of the connecting arm (22); the heating element (21) is provided with a receiving groove (211) for receiving the test piece to be tested.

2. The thermocouple position measuring device according to claim 1, characterized in that: The mounting seat (10) is formed with a groove (11) adapted to the detection platform, and the mounting seat (10) is slidably disposed on the detection platform via the groove (11).

3. The thermocouple position measuring device according to claim 1, characterized in that: The cross section of the containing groove (211) is adapted to the cross section of the test piece to be tested; And / or, a heating element is embedded in the wall surface defining the containing groove (211).

4. The thermocouple position measuring device according to claim 1, characterized in that: The heating element (21) is detachably arranged on the connecting arm (22).

5. The thermocouple position measuring device according to claim 1, characterized in that: The thermocouple position measuring device also includes a support assembly (30) for mounting the heating assembly (20) on the mounting seat (10), and one end of the connecting arm (22) is rotatably connected to the support assembly (30).

6. The thermocouple position measuring device according to claim 5, characterized in that: The support assembly (30) comprises a support member (31), wherein the support member (31) is arranged on the mounting seat (10), and one end of the connecting arm (22) is rotatably connected to the support member (31).

7. The thermocouple position measuring device according to claim 6, characterized in that: The support assembly (30) further comprises a support platform (32), the support member (31) is arranged on the support platform (32), and the support platform (32) is detachably arranged on the mounting seat (10).

8. The thermocouple position measuring device according to claim 6, characterized in that: The support member (31) and the connecting arm (22) are both arranged in a longitudinal direction; the support member (31) is arranged upright on the mounting seat (10); one end of the connecting arm (22) is rotatably connected to an end of the support member (31) away from the mounting seat (10); the other end of the connecting arm (22) is arranged in an L-shaped bend; and the heating member (21) is arranged on the other end of the connecting arm (22).

9. A measurement system, characterized in that: It comprises a detection platform and the thermocouple position measuring device according to any one of claims 1 to 8.

10. The measuring system according to claim 9, characterized in that The detection platform is provided with a guide portion, and the mounting seat (10) is movably arranged on the guide portion.

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