Two-channel N-type thermocouple transmitter with cold junction compensation

Abstract

The invention provides a two-channel N-type thermocouple transmitter with cold junction compensation, which comprises a fixed seat, a movable seat is movably mounted on the fixed seat, a sliding groove is formed in the movable seat, a supporting mechanism is fixed in the sliding groove, a supporting assembly is fixed at one end of the supporting mechanism, and the other end of the supporting assembly is connected with the movable seat. A thermocouple sensor is movably installed between the supporting assemblies, arc-shaped grooves are formed in one side of the fixed base and one side of the movable base, cables are movably installed in the arc-shaped grooves, and one ends of the cables are installed on a thermocouple thermometer. When the two-channel N-type thermocouple transmitter with cold junction compensation is used, a galvanic couple temperature device is movably installed between the supporting assemblies, the supporting assemblies extrude and fix the galvanic couple temperature device from outside to inside, and the galvanic couple temperature device can be fixed through rising of the movable plate according to the use environment of the galvanic couple temperature device. The limiting plate moves to the top of the galvanic couple temperature device to achieve vertical limiting of the galvanic couple temperature device and effectively shield and protect the display mechanism.

Description

Technical Field

[0001] The invention relates to the field of thermocouple transmitter equipment, in particular to a two-channel N-type thermocouple transmitter with cold end compensation. Background Art

[0002] Thermocouple is a widely used temperature sensor. It generates thermoelectric potential due to the temperature difference between the hot end and the cold end. The temperature transmitter can amplify and convert this thermoelectric potential into an output current signal for easy transmission and measurement. In order to make the output of the temperature transmitter only related to the measured temperature, cold end temperature compensation measures must be taken.

[0003] According to the patent document with the existing publication number CN217358783U, a two-wire thermocouple temperature transmitter with cold-end temperature compensation is disclosed, which includes a cold-end temperature compensation circuit and an XTR101AP conversion circuit; wherein the A end of the thermocouple is connected to the XTR101AP conversion circuit, the B end of the thermocouple is connected to the cold-end temperature compensation circuit and the XTR101AP conversion circuit, the XTR101AP conversion circuit is also connected to the cold-end temperature compensation circuit, and also includes: a current expansion circuit and an anti-reverse connection circuit, the current expansion circuit is connected to the XTR101AP conversion circuit and the anti-reverse connection circuit, the anti-reverse connection circuit The circuit is also connected to the XTR101AP conversion circuit. When in use, this technical solution adopts the high-precision, low-drift 4-20mA two-wire transmitter dedicated chip XTR101AP, and innovatively adds the high-precision current temperature sensor AD590 to design the thermocouple cold-end precision compensation circuit, forming a unique high-precision precision cold-end compensation two-wire thermocouple temperature transmitter with excellent performance. For the above technical solution, although this solution realizes cold-end compensation, it cannot realize the rapid installation and disassembly of the thermocouple temperature sensor during use, and it cannot protect the thermocouple temperature sensor, which is inconvenient during use. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a two-channel N-type thermocouple transmitter with cold-end compensation to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. When in use, the thermocouple temperature sensor is movably installed between the supporting components, and the supporting components are squeezed from the outside to the inside to achieve the extrusion and fixation of the thermocouple temperature sensor. According to the use environment of the thermocouple temperature sensor, the movable plate can be raised and the limit plate can be moved to the top of the thermocouple temperature sensor to achieve the upper and lower limits of the thermocouple temperature sensor and effectively shield and protect the display mechanism.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a two-channel N-type thermocouple transmitter with cold-end compensation, comprising a fixed seat, a movable seat movably mounted on the fixed seat, a slide groove is opened on the movable seat, a support mechanism is fixed inside the slide groove, a support assembly is fixed at one end of the support mechanism, a thermocouple temperature sensor is movably mounted between the support assemblies, an arc groove is opened on one side of the fixed seat and the movable seat, a cable is movably mounted inside the arc groove, and one end of the cable is mounted on the thermocouple temperature sensor.

[0006] Furthermore, the fixed seat is provided with an opening, a fixing screw is rotatably installed inside the opening, and the movable seat is provided with an opening, a limiting component is movably installed inside the opening.

[0007] Furthermore, the limiting assembly includes a supporting box, a fixing groove is formed on the top of the supporting box, and a card slot is formed on the inside of the opening, and the card slot is movably matched with the cable.

[0008] Furthermore, a reset mechanism is fixed inside the fixing groove, one end of the reset mechanism is fixed on the fixing block, and an extrusion block is movably installed on the side of the supporting box.

[0009] Furthermore, one side of the extrusion block is movable to contact the cable, one end of the extrusion block is fixed on the fixed block, and a limiting groove is opened on the side of the support box.

[0010] Furthermore, a tension mechanism is fixed inside the limiting groove, a limiting block is fixed at one end of the tension mechanism, and a limiting column is fixed on the limiting block.

[0011] Furthermore, an annular groove is formed inside the opening, and the annular groove is movably mounted on one end of the limiting column.

[0012] Furthermore, the support assembly includes a support plate, one end of the support mechanism is fixed on the support plate, a protrusion is fixed on the side of the support plate, a groove is opened on the inside of the slide slot, and the protrusion is movably installed inside the groove.

[0013] Furthermore, a support groove is opened on the side of the support plate, an elastic mechanism is fixed inside the support groove, a support block is fixed at one end of the elastic mechanism, and a movable plate is fixed at one end of the support block.

[0014] Furthermore, a connecting block is fixed on the top of the movable plate, a limiting plate is movably installed on the top of the movable plate, a connecting groove is opened on the limiting plate, and the connecting block is movably installed inside the connecting groove.

[0015] Beneficial effects of the present invention:

[0016] 1. This is a two-channel N-type thermocouple transmitter with cold-end compensation. When in use, the thermocouple temperature sensor is movably installed between the supporting components. The supporting components are squeezed from the outside to the inside to achieve the extrusion and fixation of the thermocouple temperature sensor. According to the use environment of the thermocouple temperature sensor, the movable plate can be raised and the limit plate can be moved to the top of the thermocouple temperature sensor to achieve the upper and lower limits of the thermocouple temperature sensor and effectively shield and protect the display mechanism.

[0017] 2. This is a two-channel N-type thermocouple transmitter with cold end compensation. After the movable plate moves on the support plate, the support area is extended. The movable plate and the support plate cooperate to achieve the installation and fixation of thermocouples of different thicknesses. In addition, the arc groove and the card groove cooperate to limit and fix the cable. When the cable is fixed by the extrusion block on the support box, the limit column on the support box cooperates with the ring groove to limit the movable seat up and down. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a two-channel N-type thermocouple transmitter with cold-end compensation according to the present invention;

[0019] Figure 2 It is a schematic structural diagram of a two-channel N-type thermocouple transmitter with cold-end compensation according to the present invention after the thermocouple temperature device is removed;

[0020] Figure 3 This is a schematic diagram of the structure of a two-channel N-type thermocouple transmitter with cold-end compensation according to the present invention after the movable base is removed;

[0021] Figure 4 It is a schematic diagram of the side cross-sectional structure of a movable base of a two-channel N-type thermocouple transmitter with cold end compensation of the present invention;

[0022] Figure 5 It is a structural schematic diagram of a support assembly of a two-channel N-type thermocouple transmitter with cold-end compensation according to the present invention;

[0023] Figure 6 It is a structural schematic diagram of a movable plate of a two-channel N-type thermocouple transmitter with cold-end compensation of the present invention;

[0024] In the figure: 1. fixed seat; 2. movable seat; 3. slide groove; 4. supporting mechanism; 5. supporting assembly; 6. thermocouple; 7. arc groove; 8. cable; 9. opening; 10. slot; 11. limit assembly; 12. fixing screw; 13. opening; 14. supporting box; 15. fixed groove; 16. fixed block; 17. limit groove; 18. tension mechanism; 19. limit block; 20. limit column; 21. extrusion block; 22. ring groove; 23. supporting plate; 24. supporting groove; 25. elastic mechanism; 26. supporting block; 27. protrusion; 28. movable plate; 29. ​​limit plate; 30. connecting block; 31. reset mechanism. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0026] See also Figures 1 to 6 The present invention provides a technical solution: a two-channel N-type thermocouple transmitter with cold end compensation, comprising a fixed seat 1, a movable seat 2 is movably installed on the fixed seat 1, a slide groove 3 is opened on the movable seat 2, a support mechanism 4 is fixed inside the slide groove 3, a support component 5 is fixed at one end of the support mechanism 4, a thermocouple 6 is movably installed between the support components 5, an arc groove 7 is opened on one side of the fixed seat 1 and the movable seat 2, a cable 8 is movably installed inside the arc groove 7, one end of the cable 8 is installed on the thermocouple 6, an opening 13 is opened on the fixed seat 1, a fixing screw 12 is rotatably installed inside the opening 13, an opening 9 is opened on the movable seat 2, a limit assembly 11 is movably installed inside the opening 9, the support mechanism 4 is a support spring, and the support spring pushes the support plate 23 to move inward to complete the extrusion and fixation of the thermocouple 6.

[0027] In this embodiment, the limiting assembly 11 includes a support box 14, a fixing groove 15 is opened on the top of the support box 14, a card slot 10 is opened on the inside of the opening 9, the card slot 10 is movably matched with the cable 8, a reset mechanism 31 is fixed inside the fixing groove 15, one end of the reset mechanism 31 is fixed on the fixed block 16, an extrusion block 21 is movably installed on the side of the support box 14, one side of the extrusion block 21 is movably contacted with the cable 8, one end of the extrusion block 21 is fixed on the fixed block 16, a limiting groove 17 is opened on the side of the support box 14, the reset mechanism 31 is a reset spring, the reset spring pushes the fixed block 16 to move, and the movement of the fixed block 16 pushes the extrusion block 21 to complete the extrusion and fixation of the cable 8 inside the card slot 10.

[0028] In this embodiment, a tension mechanism 18 is fixed inside the limit groove 17, a limit block 19 is fixed at one end of the tension mechanism 18, a limit column 20 is fixed on the limit block 19, an annular groove 22 is opened inside the opening 9, and the annular groove 22 is movably installed on one end of the limit column 20, the support assembly 5 includes a support plate 23, one end of the support mechanism 4 is fixed on the support plate 23, a protrusion 27 is fixed on the side of the support plate 23, a groove is opened inside the slide groove 3, and the protrusion 27 is movably installed inside the groove, and the movable seat 2 is later rotated on the limit column 20 through the annular groove 22, and the rotation is cached displacement under the collision of the movable seat 2.

[0029] In this embodiment, a support groove 24 is opened on the side of the support plate 23, and an elastic mechanism 25 is fixed inside the support groove 24. A support block 26 is fixed to one end of the elastic mechanism 25, and a movable plate 28 is fixed to one end of the support block 26. A connecting block 30 is fixed to the top of the movable plate 28. A limiting plate 29 is movably installed on the top of the movable plate 28. A connecting groove is opened on the limiting plate 29, and the connecting block 30 is movably installed inside the connecting groove. The elastic mechanism 25 is a spring, which pushes the limiting column 20 to move downward. The limiting column 20 moves downward to squeeze the movable seat 2 and the fixed seat 1 together, and the arc groove 7 between the movable seat 2 and the fixed seat 1 completes the extrusion and fixation of cables 8 of different diameters.

[0030] When the device is in use, the thermocouple 6 is installed between the support components 5, and the support plate 23 on the support component 5 moves outward under the support of the thermocouple 6. When the support plate 23 moves outward, it squeezes the support mechanism 4. After the support mechanism 4 is squeezed and deformed, the movement of the support plate 23 provides space, and the support plate 23 is pushed to squeeze and fix the thermocouple 6 through the reverse force of the support mechanism 4. When the thickness of the thermocouple 6 is greater than the height of the support plate 23, the movable plate 28 is moved upward through the support block 26. After the movable plate 28 moves upward, the limit plate 29 is moved horizontally to the top of the thermocouple 6. After the limit plate 29 enters the thermocouple 6, it shields and protects the display screen. The movable plate 28 provides a limiting support force through the limit plate 29. The limiting support force prevents the movable plate 28 from moving downward and returning to its original position. The support plate 23 and the movable plate 28 cooperate to complete the extrusion and fixation of the thermocouple 6 and provide shielding protection. After the thermocouple 6 is installed on the support component 5, The movable seat 2 is moved upward, and the movable seat 2 pushes the limit column 20 upward through the annular groove 22 to rise inside the limit groove 17. The movable seat 2 rises synchronously with the rise of the limit column 20. After rising, the width of the gap between the movable seat 2 and the fixed seat 1 increases, and the cables 8 on the thermocouple 6 are respectively installed in the inside of the card slot 10. After the cable 8 is installed in the inside of the card slot 10, one side of the cable 8 squeezes the extrusion block 21. After extrusion, the extrusion block 21 squeezes and fixes the cable 8 through the tension generated by the reset mechanism 31. One end of the cable 8 is installed in the inside of the arc groove 7 and moves outward continuously. After the cable 8 is installed in the inside of the arc groove 7, the movable seat 2 is released, and the cable 8 is fixed between the movable seat 2 and the fixed seat 1. A temperature sensor is installed at one end of the cable 8, and the temperature sensor is installed in the inside of the measured temperature field. A cold end temperature compensation circuit is installed in the thermocouple 6. The cold end temperature compensation circuit reduces the error of the cold end temperature and provides the accuracy of the measured data.

[0031] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A two-channel N-type thermocouple transmitter with cold junction compensation, comprising a fixing base (1), characterized in that: A movable seat (2) is movably mounted on the fixed seat (1), a slide groove (3) is provided on the movable seat (2), a support mechanism (4) is fixed inside the slide groove (3), a support assembly (5) is fixed at one end of the support mechanism (4), a thermocouple temperature sensor (6) is movably mounted between the support assemblies (5), an arc groove (7) is provided on one side of the fixed seat (1) and the movable seat (2), a cable (8) is movably mounted inside the arc groove (7), and one end of the cable (8) is mounted on the thermocouple temperature sensor (6).

2. A two-channel N-type thermocouple transmitter with cold junction compensation according to claim 1, characterized in that: The fixed seat (1) is provided with an opening (13), a fixing screw (12) is rotatably mounted inside the opening (13), and the movable seat (2) is provided with an opening (9), a limiting assembly (11) is movably mounted inside the opening (9).

3. A two-channel N-type thermocouple transmitter with cold junction compensation according to claim 2, characterized in that: The limiting assembly (11) comprises a supporting box (14), a fixing groove (15) is formed on the top of the supporting box (14), a card slot (10) is formed inside the opening (9), and the card slot (10) is movably matched with the cable (8).

4. A two-channel N-type thermocouple transmitter with cold junction compensation according to claim 3, characterized in that: A reset mechanism (31) is fixed inside the fixing groove (15), one end of the reset mechanism (31) is fixed on the fixing block (16), and an extrusion block (21) is movably mounted on the side of the supporting box (14).

5. A two-channel N-type thermocouple transmitter with cold junction compensation according to claim 4, characterized in that: One side of the extrusion block (21) is movable to contact the cable (8), one end of the extrusion block (21) is fixed on the fixing block (16), and a limiting groove (17) is provided on the side of the support box (14).

6. A two-channel N-type thermocouple transmitter with cold junction compensation according to claim 5, characterized in that: A tension mechanism (18) is fixed inside the limiting groove (17), a limiting block (19) is fixed at one end of the limiting mechanism (18), and a limiting column (20) is fixed on the limiting block (19).

7. A two-channel N-type thermocouple transmitter with cold junction compensation according to claim 3, characterized in that: An annular groove (22) is formed inside the opening (9), and the annular groove (22) is movably mounted on one end of the limiting column (20).

8. A two-channel N-type thermocouple transmitter with cold junction compensation according to claim 1, characterized in that: The support assembly (5) comprises a support plate (23), one end of the support mechanism (4) is fixed on the support plate (23), a protrusion (27) is fixed on the side of the support plate (23), a groove is formed inside the slide groove (3), and the protrusion (27) is movably installed inside the groove.

9. A two-channel N-type thermocouple transmitter with cold junction compensation according to claim 8, characterized in that: A support groove (24) is provided on the side of the support plate (23), an elastic mechanism (25) is fixed inside the support groove (24), a support block (26) is fixed at one end of the elastic mechanism (25), and a movable plate (28) is fixed at one end of the support block (26).

10. A two-channel N-type thermocouple transmitter with cold junction compensation according to claim 9, characterized in that: A connecting block (30) is fixed on the top of the movable plate (28), a limiting plate (29) is movably mounted on the top of the movable plate (28), a connecting groove is formed on the limiting plate (29), and the connecting block (30) is movably mounted inside the connecting groove.

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