Thermocouple

Abstract

The thermocouple comprises a thermode, a ceramic housing, a metal sheet and a junction box, the bottom of the ceramic housing is provided with an opening, the metal sheet is arranged at the opening, the surface of the metal sheet faces the outside of the ceramic housing, and the back surface of the metal sheet faces the inner cavity of the ceramic housing; a superconductive insulating layer is arranged on the surface of the metal sheet; the hot end of the thermode extends into the ceramic shell to be connected with the back face of the metal sheet, and the cold end of the thermode extends out of the ceramic shell to be connected with the junction box. The superconductive insulating layer is arranged on the surface of the metal sheet, so that the problem of electric leakage caused by insulation defects at the interface of the metal piece and the ceramic shell can be obviously reduced, and the safe electric connection among all parts of the thermode is ensured.

Description

Technical Field

[0001] This utility model relates to thermocouples. Background Technology

[0002] Thermocouples, as a common temperature measuring element, have been widely used in industrial control, environmental monitoring, and other temperature detection in high-temperature or special environments.

[0003] In existing technologies, the structural design of thermocouples has certain flaws, especially at the interface between the metal connector and the ceramic shell. Because the metal components may be partially exposed or have edges susceptible to contamination during the connection process, insulation failure may occur, leading to leakage. This leakage not only reduces the accuracy of temperature measurement but may also pose safety hazards in high-temperature or harsh environments, affecting the reliability and stability of the entire system. Utility Model Content

[0004] The purpose of this invention is to provide a thermocouple with improved overall insulation performance.

[0005] The purpose of this utility model is achieved as follows:

[0006] A thermocouple includes thermoelectrodes, a ceramic housing, a metal strip, and a junction box. The bottom of the ceramic housing is open, and the metal strip is disposed at the opening. The surface of the metal strip faces outward from the ceramic housing, and the back of the metal strip faces inward from the inner cavity of the ceramic housing.

[0007] The surface of the metal sheet is provided with a superconducting insulating layer;

[0008] The hot end of the thermoelectrode extends into the ceramic housing and connects to the back of the metal sheet, while the cold end of the thermoelectrode extends out of the ceramic housing and connects to the junction box.

[0009] By setting a superconducting insulating layer on the surface of the metal sheet, this design can significantly reduce leakage problems caused by insulation defects at the interface between the metal parts and the ceramic shell, thereby ensuring safe electrical connection between the various parts of the thermoelectrode.

[0010] The application of superconducting insulating layer not only enhances the overall insulation performance, but also makes the electrical transfer between the hot and cold ends more stable, avoiding measurement errors caused by leakage current, thereby improving the accuracy of temperature measurement and the long-term stability of the system.

[0011] This design maintains the high-temperature resistance of the ceramic shell while using a superconducting insulation layer to ensure that the equipment can maintain good working condition in high-temperature and harsh environments, thus extending the service life of the equipment.

[0012] The design incorporates a metal sheet installed at the bottom opening of the ceramic housing, with the hot end of the thermoelectric electrode directly connected to the back of the metal sheet. This compact structure facilitates standardized production and installation, meeting the requirements of practical engineering applications.

[0013] The primary objective of this utility model can also be achieved by the following technical measures:

[0014] Furthermore, the metal sheet is a planar metal sheet.

[0015] The use of planar metal sheet structure simplifies the manufacturing and assembly process, resulting in higher product consistency and stability, which helps to reduce production costs and improve reliability.

[0016] Furthermore, the metal sheet is an arc-shaped metal sheet.

[0017] The curved design better adapts to the structural curvature of the ceramic shell, improves the contact tightness between the metal sheet and the ceramic shell, and helps to achieve more uniform temperature transfer and thermoelectric conversion, thereby improving measurement accuracy.

[0018] The curved metal strip allows for a tighter and more uniform contact between the thermocouple and the heating element. This structure not only improves heat transfer efficiency and ensures more accurate and stable temperature acquisition, but also facilitates matching with heating elements of different specifications, simplifying the replacement and installation process, thereby reducing maintenance costs and improving the overall reliability of the system.

[0019] Furthermore, the metal sheet protrudes towards the inner cavity of the ceramic shell to form the arc-shaped metal sheet.

[0020] This raised design further optimizes the bonding between the metal sheet and the interior of the ceramic shell, enhances the overall structural robustness, and effectively prevents the risk of poor contact due to vibration or external forces.

[0021] Furthermore, the thermoelectrode consists of two wires of different compositions, with one end of the two wires welded together to form the hot end, and the other end of the two wires being a free end for connecting to a junction box.

[0022] Two types of wires are welded at one end to form a hot junction, creating a stable and reliable thermoelectric contact, while the other end serves as a free end connected to the junction box. This ensures a good thermoelectric conversion effect and a stable electrical signal output, thereby improving the accuracy and response speed of temperature measurement.

[0023] Furthermore, the top of the ceramic housing has a wire hole for easy passage of wires.

[0024] Creating openings for wires to pass through simplifies internal wiring design, facilitates wire arrangement and management, and enhances the overall structural compactness and ease of installation and maintenance.

[0025] Furthermore, it also includes a connecting piece, which has a locking slot for securing the ceramic shell. The connecting piece has bolt holes around the locking slot, and the ceramic shell is secured in the locking slot.

[0026] The design of the connecting piece allows the ceramic shell to be firmly clamped into the locking slot, and the outer bolt holes further secure the overall structure, effectively preventing loosening or displacement caused by vibration or external impact, thereby enhancing the mechanical stability and long-term reliability of the equipment.

[0027] The beneficial effects of this utility model are as follows:

[0028] This invention, by setting a superconducting insulating layer on the surface of a metal sheet, can significantly reduce leakage problems caused by insulation defects at the interface between the metal parts and the ceramic shell, thereby ensuring safe electrical connection between the various parts of the thermoelectrode.

[0029] In this invention, the application of a superconducting insulating layer not only enhances the overall insulation performance but also makes the electrical transfer between the hot and cold ends more stable, avoiding measurement errors caused by leakage current, thereby improving the accuracy of temperature measurement and the long-term stability of the system.

[0030] This invention maintains the high-temperature resistance of the ceramic shell and, through the protection of a superconducting insulation layer, enables the equipment to maintain good working condition in high-temperature and harsh environments, thus extending the service life of the equipment.

[0031] This invention involves installing a metal sheet at the bottom opening of a ceramic shell, with the hot end of the thermoelectric electrode directly connected to the back of the metal sheet. The structure is compact and facilitates standardized production and installation, meeting the requirements of practical engineering applications. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a thermocouple.

[0033] Figure 2 This is a schematic diagram of a thermocouple from another angle.

[0034] Figure 3 This is a cross-sectional view of a thermocouple.

[0035] Figure 4 for Figure 3 Enlarged view of part A.

[0036] Figure 5 This is a cross-sectional view of a thermocouple from another angle.

[0037] Figure 6 for Figure 5 Enlarged view of part B. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0039] Implementation examples, in conjunction with Figures 1 to 6 As shown, a thermocouple 100 includes a thermoelectrode 1, a ceramic housing 2, a metal sheet 3, and a junction box 4. The bottom opening 21 of the ceramic housing 2 is provided, and the metal sheet 3 is disposed at the opening 21. The surface of the metal sheet 3 faces outward from the ceramic housing 2, and the back of the metal sheet 3 faces inward from the inner cavity of the ceramic housing 2.

[0040] The surface of the metal sheet 3 is provided with a superconducting insulating layer 4;

[0041] The hot end of the thermoelectrode 1 extends into the ceramic shell 2 and connects to the back of the metal sheet 3, while the cold end of the thermoelectrode 1 extends out of the ceramic shell 2 and connects to the junction box 4.

[0042] Furthermore, the metal sheet 3 is a planar metal sheet.

[0043] Furthermore, the thermoelectric electrode 1 is composed of two wires 5 of different compositions. One end of the two wires 5 is welded together to form the hot end 51, and the other end of the two wires 5 is a free end 52 for connecting to the junction box 4.

[0044] Furthermore, the top of the ceramic housing 2 has a wire hole 22 for the wire 5 to pass through.

[0045] Furthermore, it also includes a connecting piece 6, which has a locking slot 61 for easy clamping of the ceramic shell 2. The connecting piece 6 has a bolt hole 62 around the locking slot 61, and the ceramic shell 2 is clamped in the locking slot 61.

[0046] In other embodiments, the metal sheet 3 is an arc-shaped metal sheet.

[0047] Furthermore, the metal sheet 3 protrudes toward the inner cavity of the ceramic shell 2 to form the arc-shaped metal sheet 3.

[0048] Thermocouple 100 enables temperature monitoring, and combined with the design of superconducting insulation layer 4, it prevents leakage risks and improves the safety and reliability of the equipment.

[0049] Thermocouple temperature measurement process

[0050] Temperature acquisition

[0051] When the object being measured (e.g., a heating element or other electrically heated device) is in operation, the heat it generates is transferred to the thermoelectrode 1 inside the ceramic housing 2 through contact with the thermocouple 100. The hot end 51 contacts the back of the metal sheet 3, and the temperature information is rapidly transferred to the interior of the thermoelectrode 1 by means of the thermal conductivity of the metal sheet 3 and the superconducting insulating layer 4.

[0052] signal transmission

[0053] The thermoelectrode 1 consists of two wires 5 of different compositions, one end of which is welded together to form a hot end 51, and the other end is a free end 52, which are electrically connected through a junction box 4. The temperature signal is transmitted in the form of an electrical signal between the superconducting insulating layer 4, the metal sheet 3, the wires 5 and the junction box 4, and the temperature signal is usually transmitted rapidly within about 3 seconds.

[0054] Temperature monitoring

[0055] Thanks to this structural design, thermocouple 100 can accurately monitor a temperature range from 0°C to 1000°C. The superconducting insulating layer 4 not only ensures accurate transmission of temperature signals but also effectively prevents the risk of leakage caused by electrically heated devices, thereby achieving safe and stable temperature monitoring.

[0056] Thermocouple 100 has the following advantages:

[0057] The heat transfer structure, which tightly integrates the superconducting insulating layer 4 with the metal sheet 3, the wire 5 and the junction box 4, enables extremely fast temperature signal transmission, completing the temperature information transmission within approximately 3 seconds, thus meeting the requirements for real-time monitoring.

[0058] Thermocouple 100 is designed to cover a temperature range of 0-1000℃, making it suitable for temperature monitoring in various high-temperature environments and heating devices.

[0059] The application of superconducting insulating layer 4 effectively isolates the electrically heated equipment from the temperature measurement circuit, preventing leakage accidents and ensuring the safety of equipment and operators.

[0060] Thermocouple 100 achieves precise contact with the heat source by attaching to the surface to collect temperature, ensuring accurate temperature data and thus enabling precise temperature control, thereby improving the thermal control performance and stability of the entire system.

[0061] Thermocouple 100 can be closely matched with heating tubes or heating devices of different shapes and sizes, and has good versatility and adaptability.

Claims

1. A thermocouple comprising thermoelectrodes, a ceramic housing, a metal sheet, and a junction box, characterized in that: The ceramic shell has an opening at the bottom, and the metal sheet is disposed at the opening, with the surface of the metal sheet facing outwards from the ceramic shell and the back of the metal sheet facing inwards from the ceramic shell. The surface of the metal sheet is provided with a superconducting insulating layer; The hot end of the thermoelectrode extends into the ceramic housing and connects to the back of the metal sheet, while the cold end of the thermoelectrode extends out of the ceramic housing and connects to the junction box.

2. The thermocouple according to claim 1, characterized in that: The metal sheet is a planar metal sheet.

3. The thermocouple according to claim 1, characterized in that: The metal sheet is an arc-shaped metal sheet.

4. The thermocouple according to claim 3, characterized in that: The metal sheet protrudes towards the inner cavity of the ceramic shell to form the arc-shaped metal sheet.

5. The thermocouple according to claim 1, characterized in that: The thermoelectrode consists of two wires of different compositions. One end of the two wires is welded together to form the hot end, and the other end of the two wires is a free end for connecting to the junction box.

6. The thermocouple according to claim 1, characterized in that: The top of the ceramic housing has a wire hole for easy passage of wires.

7. The thermocouple according to claim 1, characterized in that: It also includes a connecting piece, which has a locking slot for securing the ceramic shell. The connecting piece has bolt holes around the locking slot, and the ceramic shell is secured in the locking slot.

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