Thermocouple detection device
By designing a cleaning and calibration mechanism for the thermocouple testing device, the problem of contaminants on the thermocouple surface affecting testing accuracy was solved, achieving efficient and reliable testing results.
Patent Information
- Application Number
- CN202520363182.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-04
AI Technical Summary
Thermocouples are prone to developing oxide layers and carbon deposits on their surface under high temperature and corrosive environments, which can affect the accuracy of detection.
A thermocouple testing device including a housing, a cleaning mechanism, and a calibration mechanism was designed. The cleaning mechanism removes dirt from the surface of the thermocouple by a cleaning brush, and the calibration mechanism performs calibration using the freezing point method to ensure testing accuracy.
It effectively removes contaminants from the surface of the thermocouple, improves detection accuracy and efficiency, and ensures the reliability of the thermocouple in harsh environments.
Smart Images
Figure CN223870213U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of thermocouple detection technology, and specifically to a thermocouple detection device. Background Technology
[0002] A thermocouple is a temperature sensor that works based on the thermoelectric effect. It is widely used in industrial, scientific research and daily temperature measurement scenarios. The core of a thermocouple is the Seebeck effect. As the most widely used thermoelectric temperature sensor in industrial production, the performance stability of a thermocouple is directly related to the reliability of a temperature measurement system. Therefore, thermocouples need to be tested for accuracy after a certain period of use.
[0003] In fields such as petrochemicals, metallurgical manufacturing, and power systems, thermocouples are subjected to harsh working environments such as high temperatures and corrosive conditions for extended periods. Their hot junction surfaces are prone to adhering to contaminants such as oxide layers and carbon deposits. The presence of these surface contaminants can significantly affect the thermoelectric response characteristics of thermocouples, leading to deviations in temperature measurement accuracy. Therefore, a device is needed to solve the above problems. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides a thermocouple testing device that solves the problem of surface contaminants on existing thermocouples affecting testing accuracy during the testing process.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a thermocouple testing device, including a housing, a cleaning mechanism and a calibration mechanism, wherein a guide groove is provided on one side of the housing, a support rod is slidably connected inside the guide groove, a clamping rod is slidably connected to the top of the support rod, and a plurality of positioning holes are provided in the middle of the clamping rod, wherein the thermocouple to be tested is detachably threaded inside the positioning holes;
[0006] The cleaning mechanism includes a cleaning chamber and a cleaning brush. The cleaning chamber is located in the middle of the housing, and the cleaning brush is located on the inner wall of the cleaning chamber and is pressed against the test coupler to brush away the dirt on the surface of the test coupler.
[0007] The calibration mechanism is located inside the housing and is used to calibrate the thermocouples.
[0008] Optionally, the calibration mechanism includes a calibration chamber, a cover plate, and a drain hole. The calibration chamber is located inside the housing. The cover plate is hinged to the top of the calibration chamber to close it. The drain hole is fixedly connected to one side of the housing and communicates with the interior of the calibration chamber.
[0009] Optionally, the cleaning mechanism further includes a cleaning bucket, a compression spring, and a retaining plate. The cleaning bucket is rotatably disposed inside the cleaning chamber. The compression spring is fixedly connected to the inner wall of the cleaning bucket. The other end of the compression spring is fixedly connected to one side of the retaining plate, and the other side of the retaining plate is fixedly connected to the cleaning brush.
[0010] Optionally, a drive motor is fixedly connected to the bottom of the cleaning chamber, and the output end of the drive motor is fixedly connected to the bottom of the cleaning bucket via a keyway.
[0011] Optionally, the top of the cleaning chamber is fixedly connected to an inspection cover by bolts, the inspection cover has a through hole in the middle, and a cleaning head is fixedly connected to the axis of the bottom wall of the cleaning barrel, the through hole and the drive motor are on the same axis.
[0012] Optionally, a collection hopper is detachably connected to one side of the housing, and an ash discharge port is provided at the bottom of the cleaning chamber. The ash discharge port is connected to the collection hopper to discharge impurities.
[0013] Optionally, the inner wall of the support rod is provided with a vertical groove, and the inner wall of the clamping rod is slidably connected to the groove.
[0014] This utility model provides a thermocouple detection device, which has the following beneficial effects:
[0015] This invention provides a thermocouple testing device. Through the coordinated arrangement of a cleaning chamber and a cleaning brush in the cleaning mechanism, the outer surface of the thermocouple's hot junction can be polished by the cleaning brush before testing, reducing contaminants adhering to the surface and preventing deviations in the test readings due to surface contamination. The coordinated arrangement of the support rod and clamping rod allows for simultaneous polishing and testing of multiple thermocouples, improving testing efficiency. Simultaneously, the test thermocouple and the thermocouple under test can be tested, and calibration can be performed concurrently. The calibration mechanism allows for the calibration of the thermocouple's testing accuracy using the freezing point method. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the structure of this utility model in use;
[0018] Figure 3 This is a schematic diagram of the structure of this utility model after it is folded up;
[0019] Figure 4 This is a side sectional view of the present invention.
[0020] In the diagram: 1. Housing; 2. Guide groove; 3. Support rod; 5. Clamping rod; 6. Positioning hole; 7. Tested thermocouple; 8. Cleaning chamber; 9. Cleaning brush; 10. Calibration chamber; 11. Cover plate; 12. Drain hole; 13. Cleaning bucket; 14. Compression spring; 15. Abutment plate; 16. Drive motor; 17. Inspection cover; 18. Through hole; 19. Cleaning head; 20. Collection hopper; 21. Ash discharge port; 22. Slide chute. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0022] Please see Figures 1 to 4 This utility model provides a technical solution: a thermocouple testing device, including a housing 1, a cleaning mechanism and a calibration mechanism. A guide groove 2 is provided on one side of the housing 1. A support rod 3 is slidably connected inside the guide groove 2. A clamping rod 5 is slidably connected to the top of the support rod 3. A plurality of positioning holes 6 are provided in the middle of the clamping rod 5. The thermocouple 7 to be tested is detachably threaded inside the positioning holes 6.
[0023] The cleaning mechanism includes a cleaning chamber 8 and a cleaning brush 9. The cleaning chamber 8 is located in the middle of the housing 1, and the cleaning brush 9 is located on the inner wall of the cleaning chamber 8 and is pressed against the test coupler 7 to brush away the dirt on the surface of the test coupler 7.
[0024] The support rod 3 can slide along the guide groove 2. The clamping rod 5 at one end of the support rod 3 can slide out of or retract into the support rod 3, thereby adjusting the height of the test coupler 7 fixed on the clamping rod 5. The test coupler 7 is connected to the positioning hole 6 by bolts. There are multiple positioning holes 6, which can test multiple test couplers 7 at the same time. When the coupler is inserted into the cleaning chamber 8, the cleaning brush 9 in the cleaning chamber 8 can clean the outer surface of the test coupler 7, reducing the dirt attached to the detection end of the test coupler 7 and reducing the impact of dirt on the test results.
[0025] The calibration mechanism is located inside housing 1 and is used to calibrate thermocouples.
[0026] In this embodiment, as a preferred option, the calibration mechanism includes a calibration chamber 10, a cover plate 11, and a drain hole 12. The calibration chamber 10 is located inside the housing 1. The cover plate 11 is hinged to the top of the calibration chamber 10 to close the calibration chamber 10. The drain hole 12 is fixedly connected to one side of the housing 1 and communicates with the interior of the calibration chamber 10.
[0027] Add the ice-water mixture into the calibration chamber 10, then slide the clamping rod 5 to position the thermocouple 7 under test at the top of the calibration chamber 10. After aligning the positions, retract the clamping rod 5 so that the detection end of the thermocouple 7 under test is inserted into the calibration chamber 10. Adjust the measurement accuracy of the thermocouple 7 under test using the freezing point method. After opening the cover plate 11, ice can be added into the calibration chamber 10. In actual use, a cooling rod can also be installed in the calibration chamber 10 to maintain the temperature of the calibration chamber 10. The drain hole 12 on the side is used to drain excess liquid from the calibration chamber 10.
[0028] In this embodiment, as a preferred solution, the cleaning mechanism further includes a cleaning bucket 13, a compression spring 14, and a retaining plate 15. The cleaning bucket 13 is rotatably disposed inside the cleaning chamber 8. The compression spring 14 is fixedly connected to the inner wall of the cleaning bucket 13. The other end of the compression spring 14 is fixedly connected to one side of the retaining plate 15. The other side of the retaining plate 15 is fixedly connected to the cleaning brush 9. A drive motor 16 is fixedly connected to the bottom of the cleaning chamber 8. The output end of the drive motor 16 is fixedly connected to the bottom of the cleaning bucket 13 through a keyway. An inspection cover 17 is fixedly connected to the top of the cleaning chamber 8 by bolts. A through hole 18 is opened in the middle of the inspection cover 17. A cleaning head 19 is fixedly connected to the axis of the bottom wall of the cleaning bucket 13. The through hole 18 and the drive motor 16 are on the same axis.
[0029] The number of cleaning mechanisms corresponds one-to-one with the number of positioning holes 6, allowing each tested thermocouple 7 to be cleaned. During the cleaning process, the drive motor 16 at the bottom drives the cleaning bucket 13 to rotate. The compression spring 14 inside the cleaning bucket 13 pushes the clamping plate 15 to move towards the axis of the cleaning bucket 13, causing the cleaning brush 9 on one side of the clamping plate 15 to press against the outer surface of the tested thermocouple 7. The drive motor 16 drives the cleaning brush 9 to rotate, thereby achieving the effect of cleaning the outer surface of the tested thermocouple 7. At the same time, during cleaning, the cleaning head 19 at the bottom of the cleaning bucket 13 can clean the end of the tested thermocouple 7 to reduce dirt at the end. After removing the fixing bolts, the inspection cover 17 can be opened to replace the internal cleaning brush 9 or cleaning head 19 to maintain high cleaning efficiency. The output end of the drive motor 16 is equipped with a synchronous belt, so that one drive motor 16 can drive multiple cleaning buckets 13 to rotate. The bottom of the cleaning bucket 13 has holes, and the dust and dirt that are swept off will be discharged to the outside of the cleaning bucket 13 through the holes.
[0030] In this embodiment, as a preferred option, a collection hopper 20 is detachably connected to one side of the housing 1, and a ash discharge port 21 is provided at the bottom of the cleaning chamber 8. The ash discharge port 21 is connected to the collection hopper 20 to discharge impurities.
[0031] During the cleaning process, the scraped dirt will fall to the bottom of the cleaning bucket 13 and move to the outside of the cleaning bucket 13 due to centrifugal force. Finally, it will be discharged from the opening at the bottom of the cleaning bucket 13 to the outside of the cleaning bucket 13, and then fall into the collection hopper 20 through the ash discharge port 21. The collection hopper 20 will clean the dirt that has been swept down. After collecting for a period of time, the collection hopper 20 can be removed and the dirt in the collection hopper 20 can be cleaned.
[0032] In this embodiment, as a preferred option, the inner wall of the support rod 3 is provided with a vertical groove 22, and the inner wall of the clamping rod 5 is slidably connected to the groove 22.
[0033] The slide groove 22 limits the sliding direction of the clamping rod 5. The clamping rod 5 has two protrusions connected to the slide groove 22 to prevent the clamping rod 5 from tipping over. When not in use, the clamping rod 5 and the support rod 3 can be flipped down and the clamping rod 5 can be attached to one side of the housing 1 to reduce the space occupied.
[0034] In this invention, the working steps of the device are as follows:
[0035] 1. Before testing, add the ice-water mixture into the calibration chamber 10, install multiple test couplers 7 in the positioning holes 6, move the clamping rod 5 to move the test coupler 7 to the through hole 18 above the inspection cover 17, start the drive motor 16 to drive multiple cleaning buckets 13 to rotate, press the clamping rod 5 down so that the test coupler 7 is in the middle of the cleaning brush 9, and the cleaning brush 9 processes the test coupler 7.
[0036] 2. After cleaning, pull out the clamping rod 5, move the test couple 7 above the cover plate 11, insert the test couple 7 into the calibration chamber 10, and connect the test wire at one end of the test couple 7 to the input end on the other side of the housing 1 to test the test couple 7.
[0037] 3. After the test is completed, remove the test coupler 7 from the positioning hole 6 and take it directly from the side of the calibration chamber 10 to prevent water stains on the test coupler 7 from dripping into the cleaning chamber 8. After the test is completed, open the drain hole 12 to drain the liquid in the calibration chamber 10, and retract the clamping rod 5 and the support rod 3 to the side of the housing 1.
[0038] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.
[0039] The specific embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A thermocouple detection device, characterized in that: The device includes a housing (1), a cleaning mechanism, and a calibration mechanism. A guide groove (2) is provided on one side of the housing (1). A support rod (3) is slidably connected inside the guide groove (2). A clamping rod (5) is slidably connected to the top of the support rod (3). A plurality of positioning holes (6) are provided in the middle of the clamping rod (5). A test couple (7) is detachably threaded inside the positioning holes (6). The cleaning mechanism includes a cleaning chamber (8) and a cleaning brush (9). The cleaning chamber (8) is located in the middle of the housing (1). The cleaning brush (9) is located on the inner wall of the cleaning chamber (8) and is pressed against the test coupler (7) to brush away the dirt on the surface of the test coupler (7). The calibration mechanism is located inside the housing (1) and is used to calibrate the thermocouple.
2. The thermocouple detection device according to claim 1, characterized in that: The calibration mechanism includes a calibration chamber (10), a cover plate (11), and a drain hole (12). The calibration chamber (10) is located inside the housing (1). The cover plate (11) is hinged to the top of the calibration chamber (10) to close the calibration chamber (10). The drain hole (12) is fixedly connected to one side of the housing (1) and communicates with the interior of the calibration chamber (10).
3. A thermocouple detection device according to claim 1 or 2, characterized in that: The cleaning mechanism also includes a cleaning bucket (13), a compression spring (14), and a retaining plate (15). The cleaning bucket (13) is rotatably disposed inside the cleaning chamber (8). The compression spring (14) is fixedly connected to the inner wall of the cleaning bucket (13). The other end of the compression spring (14) is fixedly connected to one side of the retaining plate (15). The other side of the retaining plate (15) is fixedly connected to the cleaning brush (9).
4. A thermocouple detection device according to claim 3, characterized in that: The bottom of the cleaning chamber (8) is fixedly connected to a drive motor (16), and the output end of the drive motor (16) is fixedly connected to the bottom of the cleaning bucket (13) through a keyway.
5. A thermocouple detection device according to claim 4, characterized in that: The top of the cleaning chamber (8) is fixedly connected to an inspection cover (17) by bolts. The inspection cover (17) has a through hole (18) in the middle. A cleaning head (19) is fixedly connected to the axis of the bottom wall of the cleaning barrel (13). The through hole (18) and the drive motor (16) are on the same axis.
6. A thermocouple detection device according to claim 1 or 2, characterized in that: A collection hopper (20) is detachably connected to one side of the housing (1), and a ash discharge port (21) is provided at the bottom of the cleaning chamber (8). The ash discharge port (21) is connected to the collection hopper (20) to discharge impurities.
7. A thermocouple detection device according to claim 1 or 2, characterized in that: The inner wall of the support rod (3) is provided with a vertical groove (22), and the inner wall of the clamping rod (5) is slidably connected to the groove (22).