Thermocouple temperature measuring device
By installing a protective tube and coating a high-temperature insulation layer in the thermocouple temperature measuring device, the problems of easy oxidation and contact continuity of thermocouples in high-temperature environments are solved, resulting in cost reduction and safety improvement, and increasing the manufacturing efficiency of photovoltaic components.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-03-24
AI Technical Summary
Existing thermocouples are prone to oxidation and are costly in high-temperature environments. Furthermore, the probes are easily in contact with the furnace wires, which affects the manufacturing efficiency and safety of photovoltaic components.
A positive and negative dipole wires are arranged in the first protective tube, and the joint end is coated with a high-temperature insulating layer. A second protective tube made of transparent material is also provided to reduce costs and increase service life, while reducing the risk of oxidation and contact continuity.
It reduces testing costs, improves the lifespan and safety of thermocouples, reduces the risk of contact and conduction with the heating wire, and enhances the accuracy and safety of temperature detection.
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Figure CN224034796U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of temperature detection, and particularly relates to a thermocouple temperature detection device. BACKGROUND
[0002] In the manufacturing of photovoltaic components, a diffusion oxidation annealing furnace is needed to complete diffusion, oxidation, annealing, alloying and sintering of the photovoltaic components. The temperature of the diffusion oxidation annealing furnace is usually above 1400 DEG C. Ordinary temperature detectors, such as thermistor sensors or liquid thermometers, are difficult to meet the temperature detection requirements under such high temperature conditions, and therefore a thermocouple is needed to complete temperature detection.
[0003] When a thermocouple is used to detect the temperature of the diffusion oxidation annealing furnace, the probe of the thermocouple usually needs to be deeply inserted into the furnace chamber. In this case, the ordinary thermocouple is prone to oxidation, which affects the service life of the thermocouple and the manufacturing efficiency of the photovoltaic components. In order to solve this problem, in the related art, an armored thermocouple is usually used to replace the ordinary thermocouple to complete the temperature detection of the diffusion oxidation annealing furnace.
[0004] However, the thermocouple wire of the armored thermocouple is usually made of expensive noble metal and is manufactured by a stretching process. The size of the thermocouple wire is generally small, and the service life is short. Therefore, the armored thermocouple is not the preferred thermocouple temperature detection device for the diffusion oxidation annealing furnace due to the cost and size limitations. In addition, whether it is an ordinary thermocouple or an armored thermocouple, the probe is prone to contact and conduct with the furnace wire when it is in the furnace chamber. CONTENT OF THE INVENTION
[0005] In view of the above, it is necessary to provide a thermocouple temperature detection device which can replace the armored thermocouple, reduce the detection cost, reduce the risk of contact and conduction with the furnace wire, and improve the safety and service life.
[0006] The present application provides a thermocouple temperature detection device, which comprises a positive electrode thermocouple wire, a negative electrode thermocouple wire, a first protective tube and a wiring device. The positive electrode thermocouple wire and the negative electrode thermocouple wire are arranged in the first protective tube. One end of the positive electrode thermocouple wire and one end of the negative electrode thermocouple wire are connected to the wiring device, and the wiring device is used to connect the positive electrode thermocouple wire and the negative electrode thermocouple wire to an external circuit. The other end of the positive electrode thermocouple wire and the other end of the negative electrode thermocouple wire are connected to form a joint end, and the joint end is coated with a high-temperature insulating layer.
[0007] In the thermocouple temperature measuring device of the present application, the positive electrode wire and the negative electrode wire are arranged in the first protective tube and then connected with the connector. In this case, compared with the armored thermocouple, the wire can be made of a lower-cost material and the diameter of the wire can be larger, that is, both the cost can be reduced and the service life of the wire can be improved. In addition, after the positive electrode wire and the negative electrode wire are connected to form a combined end (i.e. a probe), a high-temperature insulation layer is coated on the combined end, which can reduce the problem of high-temperature oxidation of the combined end and reduce the risk of contact with the heating wire, thereby improving the safety of the thermocouple temperature measuring device and prolonging the service life of the wire.
[0008] In some embodiments, the thermocouple temperature measuring device further comprises a second protective tube made of transparent material, the diameter of the second protective tube is larger than the diameter of the first protective tube, one end of the second protective tube is connected to the connector, and the other end of the second protective tube is connected to the end of the first protective tube close to the connector in an interference fit.
[0009] In some embodiments, the thermocouple temperature measuring device further comprises a first insulation tube and a second insulation tube, the first insulation tube and the second insulation tube are arranged in the second protective tube, the part of the positive electrode wire close to the connector is arranged in the first insulation tube, and the part of the negative electrode wire close to the connector is arranged in the second insulation tube.
[0010] In some embodiments, the length of the positive electrode wire and the length of the negative electrode wire are the same, the length of the first protective tube is smaller than the length of the positive electrode wire or the negative electrode wire, and the length of the second protective tube is smaller than the length of the first protective tube.
[0011] In some embodiments, the first protective tube and the second protective tube are standard circular tubes.
[0012] In some embodiments, the combined end is spherical, and the combined end is located outside the first protective tube.
[0013] In some embodiments, the end of the first protective tube away from the connector is cylindrical or conical.
[0014] In some embodiments, the material of the high-temperature insulation layer is a high-temperature ceramic colloid of one of silicate, aluminum sulfate salt, or phosphoric acid salt.
[0015] In some embodiments, the material of the first protective tube is one of ceramic material, mica material, or quartz material, and the material of the second protective tube is fluoropolymer material.
[0016] In some embodiments, the material of the first insulation tube and the second insulation tube is ceramic fiber. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is a structural schematic diagram of the thermocouple temperature measuring device of the first embodiment of the present application.
[0018] Figure 2 This application Figure 1 A structurally disassembled schematic diagram of the thermocouple temperature measuring device in an embodiment.
[0019] Figure 3 This is a schematic diagram illustrating an application scenario where the thermocouple temperature measuring device according to an embodiment of this application is used for temperature measurement in a diffusion oxidation annealing furnace.
[0020] Figure 4 This is a schematic diagram of the thermocouple structure according to the second embodiment of this application.
[0021] Figure 5 This is a schematic diagram of the thermocouple temperature measuring device according to the third embodiment of this application.
[0022] Figure 6 This is a structural disassembly diagram of the thermocouple according to the fourth embodiment of this application.
[0023] Explanation of key component symbols:
[0024] 1. Thermocouple temperature measuring device; 11. Positive thermocouple wire; 12. Negative thermocouple wire; 21. Connecting end; 12. High temperature insulation layer; 13. First protective tube; 14. Connector; 15. Second protective tube; 16. First insulating tube; 17. Second insulating tube; 2. Diffusion oxidation annealing furnace.
[0025] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation
[0026] In the description of the embodiments in this application, the words "exemplary," "or," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the words "exemplary," "or," and "for example" is intended to present the relevant concepts in a specific manner.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application's specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. "At least one" means one or more. "More than one" means two or more. For example, at least one of a, b, or c can represent seven cases: a, b, c, a and b, a and c, b and c, and a, b, and c.
[0028] In addition, it should be noted that the terms "first", "second" in the specification and claims of the present application and the drawings are used to distinguish similar objects, and are not used to describe a specific order or sequence.
[0029] In the manufacture of photovoltaic components, a diffusion oxidation annealing furnace is needed to complete the diffusion, oxidation, annealing, alloying and sintering of photovoltaic components. The temperature of the diffusion oxidation annealing furnace is usually above 1400℃, especially the temperature in the furnace, which can even reach above 1600℃. Ordinary temperature detectors, such as thermistor sensors or liquid thermometers, can mostly measure temperature limits below several hundred degrees Celsius. Ordinary temperature detectors are difficult to meet the temperature measurement needs under such high temperature conditions. The thermocouple type temperature detector (hereinafter referred to as "thermocouple") converts the temperature signal into an electrical signal using the thermoelectric effect. The temperature measurement range of some thermocouple type temperature detectors can reach 1800℃, so such thermocouple type temperature detectors can be used to complete the temperature detection of the diffusion oxidation annealing furnace in the manufacture of photovoltaic components.
[0030] When using a thermocouple to detect the temperature of a diffusion oxidation annealing furnace, the probe of the thermocouple usually needs to be inserted deep into the furnace. In the case of such high temperature in the furnace, the probe of the ordinary thermocouple will also be easily oxidized due to high temperature, resulting in poor service life of the thermocouple and poor measurement accuracy of the oxidized probe, which affects the manufacturing efficiency of photovoltaic components. In order to solve this problem, in the related art, armored thermocouples with many advantages such as flexibility, high pressure resistance, fast thermal response time and durability are usually used to replace ordinary thermocouples to complete the temperature detection of the diffusion oxidation annealing furnace.
[0031] The armored thermocouple is a kind of solid combination of thermocouple wire, insulating material and metal protective sleeve after assembly and stretching processing. Although the armored thermocouple has many advantages as described above, the thermocouple wire of the armored thermocouple is usually a relatively expensive noble metal (such as platinum), and is manufactured by stretching process. The size of the thermocouple wire is generally small, so it is limited by cost and size, and it is not the preferred thermocouple temperature measurement device for the diffusion oxidation annealing furnace. In addition, whether it is an ordinary thermocouple or an armored thermocouple, the probe is easy to be in contact with the furnace wire when it is in the furnace.
[0032] Therefore, the embodiments of the present application provide a thermocouple temperature measurement device which can replace the armored thermocouple, reduce the risk of contact with the furnace wire, improve safety and service life, and reduce detection cost. Some embodiments will be described below with reference to the accompanying drawings. The embodiments described below and the features in the embodiments can be combined with each other without conflict.
[0033] Figure 1is a structural schematic diagram of a thermocouple temperature measuring device 1 of a first embodiment of the present application. Figure 2 is a structural schematic diagram of a thermocouple temperature measuring device 1 of a first embodiment of the present application. Figure 1 is a structural schematic diagram of a thermocouple temperature measuring device 1 of a first embodiment of the present application. Figure 3 is an application scenario schematic diagram of a thermocouple temperature measuring device 1 of an embodiment of the present application for temperature measurement in a diffusion oxidation annealing furnace 2.
[0034] Referring to Figure 1 and Figure 2 , the present application provides a thermocouple temperature measuring device 1. Referring to Figure 2 , the thermocouple temperature measuring device 1 can include a positive electrode wire 11, a negative electrode wire 12, a first protective tube 13, and a wiring device 14.
[0035] The one end of the positive electrode wire 11 and the one end of the negative electrode wire 12 can be connected to the wiring device 14. In order to distinguish, the free end of the positive electrode wire 11 and the free end of the negative electrode wire 12 are referred to as the free end of the positive electrode wire 11 and the free end of the negative electrode wire 12, respectively, which can be connected to the wiring device 14.
[0036] As shown in Figure 3 , the thermocouple temperature measuring device 1 of an embodiment of the present application can be inserted into a diffusion oxidation annealing furnace 2 for temperature measurement.
[0037] In some embodiments, the wiring device 14 can be used to connect the positive electrode wire 11 and the negative electrode wire 12 to an external circuit. The external circuit can include a signal acquisition circuit, a processing circuit, or a display circuit, etc. The external circuit can also be a circuit in a signal processor. In this case, the thermocouple temperature measuring device 1 can be connected to a circuit or device for acquiring and processing the electrical signal generated by the thermocouple temperature measuring device 1 due to temperature changes through the wiring device 14, so that the operator can obtain the temperature data of the diffusion oxidation annealing furnace 2.
[0038] In an embodiment of the present application, the other end of the positive electrode wire 11 can be connected to the other end of the negative electrode wire 12 to form a joint end 21. In order to distinguish, the hot end of the positive electrode wire 11 and the hot end of the negative electrode wire 12 are referred to as the hot end of the positive electrode wire 11 and the hot end of the negative electrode wire 12, respectively, which can be connected to form the joint end 21. The joint end 21 is also referred to as a probe.
[0039] In some embodiments, the joint end 21 is spherical, and the joint end 21 is located outside the first protective tube 13. In this case, the joint end 21 is spherical, which can on the one hand more evenly receive heat radiation in the furnace of the diffusion oxidation annealing furnace 2, improving the accuracy of the measurement, and on the other hand, the joint end 21 is spherical, which can also reduce the problem of scratching the photovoltaic components due to deep into the furnace. In addition, the joint end 21 is located outside the first protective tube 13, which can reduce the influence of the first protective tube 13 on the joint end 21 and improve the accuracy of the measurement.
[0040] In the embodiments of the present application, the joint end 21 can be coated with a high-temperature insulating layer 1112. In this case, by coating the joint end 21 with a high-temperature insulating layer 1112, on the one hand, the problem of high-temperature oxidation of the joint end 21 can be reduced, and on the other hand, the risk of contact with the heating wire can be reduced, thereby improving the safety of the thermocouple temperature measuring device 1 and prolonging the service life of the thermocouple wire.
[0041] In some embodiments, the material of the high-temperature insulating layer 1112 is one of silicate, aluminum sulfate salt, or phosphoric acid salt.
[0042] In the embodiments of the present application, the high-temperature insulating layer 1112 can be obtained by coating the joint end 21 with one of silicate, aluminum sulfate salt, or phosphoric acid salt, and then heating and curing the coated joint end 21 in a predetermined temperature space, such as a space environment of 100°C.
[0043] In some embodiments, the process of coating and curing the high-temperature insulating layer 1112 of the joint end 21 can be performed when the joint end 21 is made, or it can be performed after the first protective tube 13 is assembled.
[0044] Please refer to Figure 1 In the embodiments of the present application, the positive thermocouple wire 11 and the negative thermocouple wire 12 are arranged in the first protective tube 13. In addition, the positive thermocouple wire 11 and the negative thermocouple wire 12 can penetrate the first protective tube 13, that is, the first protective tube 13 has tube openings at both ends, and the positive thermocouple wire 11 and the negative thermocouple wire 12 are arranged in the first protective tube 13 and can partially extend out of the first protective tube 13. In this case, the first protective tube 13 can be used for insulation, isolation and other protection of the positive thermocouple wire 11 and the negative thermocouple wire 12, and compared with the armored thermocouple, the size of the positive thermocouple wire 11 and the negative thermocouple wire 12 can not be limited by the first protective tube 13, and the size can be larger and the service life can be more durable.
[0045] In some embodiments, the length of the positive wire 11 and the length of the negative wire 12 are the same, and the length of the first protective tube 13 is smaller than the length of the positive wire 11 or the length of the negative wire 12. In this case, the length of the positive wire 11 and a part of the length of the negative wire 12 can extend out of the first protective tube 13 to form a probe, which can be used for temperature detection.
[0046] In some embodiments, the positive wire 11 or the negative wire 12 can be any metal or alloy other than platinum. In this case, the cost can be reduced. In other embodiments, the positive wire 11 or the negative wire 12 can also be made of platinum.
[0047] In some embodiments, the first protective tube 13 is made of one of ceramic material, mica material or quartz material. In this case, the first protective tube 13 can be both heat-resistant and insulating, so that the wires of the thermocouple temperature detection device 1 can be insulated and isolated in the diffusion oxidation annealing furnace 2, for example, to improve the service life of the wires of the thermocouple temperature detection device 1.
[0048] In some embodiments, the ceramic material can include, but is not limited to, high-temperature oxide ceramics (such as Al2O3, ZrO, MgO, CaO, ThO2, Cr2O3, SiO2, BeO, etc.), carbide ceramics, boride ceramics, nitride ceramics and silicide ceramics, etc.
[0049] In some embodiments, the first protective tube 13 can be a standard round tube. The first protective tube 13 of the standard round tube has a larger aperture, so that the positive wire 11 and the negative wire 12 with larger sizes can be easily arranged therein, and the first protective tube 13 of the standard round tube is different from the special-shaped tube, and is more convenient to assemble.
[0050] Figure 4 is a structural schematic diagram of a thermocouple of a second embodiment of the present application. Figure 4 Embodiments and Figure 1 The difference between the embodiments is that the shape of the end of the first protective tube 13 away from the connector 14 can be different.
[0051] Specifically, please refer to Figure 4, the first protective tube 13 is cylindrical or conical at the end away from the connector 14, i.e. the end of the first protective tube 13 close to the probe formed by the positive and negative wires 11 and 12 can be cylindrical or conical. For example, the inner diameter of the end of the first protective tube 13 away from the connector 14 can gradually decrease towards the axis of the first protective tube 13 to form a conical shape, and the conical top can be the mouth of the first protective tube 13. In this case, when it is necessary to insert the probe into the diffusion oxidation annealing furnace 2 through the insertion hole on the wall of the diffusion oxidation annealing furnace 2, the conical shape can play a certain guiding role, thereby facilitating smooth insertion into the diffusion oxidation annealing furnace 2.
[0052] Figure 5 is a structural schematic diagram of the thermocouple temperature measuring device 1 of the third embodiment of the present application. Among them, Figure 5 The difference between the embodiment and Figure 1 The difference between the embodiment and
[0053] Please refer to Figure 5 In the embodiment of the present application, one end of the second protective tube 15 is connected to the connector 14, and the other end of the second protective tube 15 is connected to the end of the first protective tube 13 close to the connector 14 in an interference fit. In this case, the second protective tube 15 of transparent material can facilitate the operator to observe the heat conduction of the positive and negative wires 11 and 12, thereby quickly determining whether the diffusion oxidation annealing furnace 2 is abnormal. For example, if the diffusion oxidation annealing furnace 2 is being measured, since the metal has a specific color reaction to temperature change, if the positive and negative wires 11 and 12 show obvious burning color, it means that the diffusion oxidation annealing furnace 2 is normal, and if the positive and negative wires 11 and 12 do not show obvious burning color, it means that the diffusion oxidation annealing furnace 2 is abnormal.
[0054] In addition, the other end of the second protective tube 15 is connected to the end of the first protective tube 13 close to the connector 14, which can facilitate assembly and also facilitate disassembly to facilitate the operator to disassemble the first protective tube 13 to observe and maintain the positive and negative wires 11 and 12. In addition, the other end of the second protective tube 15 is connected to the end of the first protective tube 13 close to the connector 14 in an interference fit, which can improve the centering and air tightness of the first protective tube 13 and the second protective tube 15.
[0055] In some embodiments, as Figure 5As shown, the diameter of the second protective tube 15 can be greater than the diameter of the first protective tube 13. In this case, the diameter of the second protective tube 15 is greater than the diameter of the first protective tube 13, which can facilitate interference assembly with the first protective tube 13, and at the same time, due to the larger diameter, when the junction end 21 of the thermocouple temperature measuring device 1 is inserted into the furnace through the insertion hole on the furnace wall of the diffusion oxidation annealing furnace 2, the second protective tube 15 can play a certain limiting and fixing role, thereby reducing the problem of the junction end 21 of the thermocouple temperature measuring device 1 being too deep into the furnace and causing scratching of the photovoltaic components.
[0056] In some embodiments, the length of the second protective tube 15 can be less than the length of the first protective tube 13. In this case, since the second protective tube 15 is located outside the furnace of the diffusion oxidation annealing furnace 2, its length can be set to a position that meets the temperature range that the connector 14 can withstand, for example, 20 to 50 centimeters outside the furnace wall, thereby reducing material costs.
[0057] In some embodiments, the second protective tube 15 can also be a standard circular tube corresponding to the first protective tube 13.
[0058] In some embodiments, the material of the second protective tube 15 can be fluoropolymer material, such as transparent Teflon. In this case, on the one hand, fluoropolymer material can withstand high temperatures, and the end near the furnace of the diffusion oxidation annealing furnace 2 and connected to the first protective tube 13 can normally be heat-insulated to protect the thermocouple wire and the connector 14 of the thermocouple temperature measuring device 1, on the other hand, fluoropolymer material has a certain elasticity compared to metal or ceramic materials, thereby facilitating interference assembly of the second protective tube 15 and the first protective tube 13.
[0059] In other embodiments, the material of the second protective tube 15 can also be the same material as the first protective tube 13, that is, the material can be one of ceramic material, mica material, or quartz material. At this time, the first protective tube 13 can be connected to the second protective tube 15 through threads.
[0060] In addition, Figure 5 The first protective tube 13 of the embodiment can also be the same as Figure 4 The first protective tube 13 of the embodiment can also be the same as Figure 5 The end of the first protective tube 13 of the embodiment away from the connector 14 can also be cylindrical or conical.
[0061] Figure 6 is a structure split schematic diagram of the thermocouple of the fourth embodiment of the present application. Among them, Figure 6 The embodiment is the same as Figure 5 The difference between the embodiment and the third embodiment is that the thermocouple temperature measuring device 1 can further include a first insulating tube 16 and a second insulating tube 17.
[0062] Please see Figure 6 In the embodiments of this application, both the first insulating tube 16 and the second insulating tube 17 can be disposed within the second protective tube 15. The portion of the positive electrode wire 11 near the connector 14 is disposed within the first insulating tube 16, and the portion of the negative electrode wire 12 near the connector 14 is disposed within the second insulating tube 17. In this case, the positive electrode wire 11 and the negative electrode wire 12 can be insulated and isolated by the first insulating tube 16 and the second insulating tube 17, thereby improving the safety of wire temperature measurement.
[0063] In some embodiments, near the connector 14, the positive dipole wire 11 and the first insulating tube 16 can be connected together to the connector 14, and the negative dipole wire 12 can be connected together to the connector 14 with the second insulating tube 17. In this case, the first insulating tube 16 and the second insulating tube 17 can provide better electrical insulation for the positive dipole wire 11 and the negative dipole wire 12, thereby enabling the electrical signals obtained by the positive dipole wire 11 and the negative dipole wire 12 to be accurately output to the external circuit through the connector 14.
[0064] In some embodiments, please refer to Figure 6 The lengths of the first insulating tube 16 and the second insulating tube 17 can be less than the length of the first protective tube 13. Alternatively, the lengths of the first insulating tube 16 and the second insulating tube 17 can be greater than the length of the second protective tube 15, thereby facilitating coupling into the first protective tube 13. Furthermore, the lengths of the first insulating tube 16 and the second insulating tube 17 can also be less than or equal to the length of the second protective tube 15, thereby reducing the risk of the first insulating tube 16 and the second insulating tube 17 being damaged due to high temperatures if they are too close to the center of the furnace.
[0065] In some embodiments, the first insulating tube 16 and the second insulating tube 17 can be made of ceramic fiber. The first insulating tube 16 and the second insulating tube 17 made of ceramic fiber are also called yellow wax tubes, yellow nano tubes, or ceramic fiber tubes. In this case, the first insulating tube 16 and the second insulating tube 17 made of ceramic fiber can have both good electrical insulation and certain tensile properties, which facilitates the matching of the positive dipole wire 11 and the negative dipole wire 12 and provides insulation protection for the positive dipole wire 11 and the negative dipole wire 12.
[0066] in addition, Figure 6 The first protective tube 13 in the embodiment can also be with Figure 4 The first protective tube 13 in the embodiment has the same configuration, that is Figure 6 In this embodiment, the end of the first protective tube 13 away from the connector 14 can also be cylindrical or conical.
[0067] In the embodiments of the present application, the connector 14 can be connected to external circuits, such as signal acquisition circuits, processing circuits, display circuits, and circuits in signal processors.
[0068] In some embodiments, the connector 14 can be an N-type or K-type plug.
[0069] In other embodiments, the connector 14 can also be any one of A-type to O-type plugs.
[0070] In summary, in the thermocouple temperature measuring device 1 of the present application, the positive electrode wire 11 and the negative electrode wire 12 are arranged in the first protective tube 13 and then connected to the connector 14. In this case, compared with armored thermocouples, the wires can be made of lower-cost materials and have larger diameters, that is, both the cost and the service life of the wires can be improved. In addition, after the positive electrode wire 11 and the negative electrode wire 12 are connected to form the combined end 21 (i.e., the probe), the high-temperature insulation layer 1112 is coated on the combined end 21, which can reduce the high-temperature oxidation problem of the combined end 21 and reduce the risk of contact with the heating wire, thereby improving the safety of the thermocouple temperature measuring device 1 and the service life of the wires.
[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.
Claims
1. A thermocouple temperature measuring device, characterized in that, It includes a positive dipole wire, a negative dipole wire, a first protective tube, and a connector; the positive dipole wire and the negative dipole wire are both disposed in the first protective tube; one end of the positive dipole wire and one end of the negative dipole wire are both connected to the connector, and the connector is used to connect the positive dipole wire and the negative dipole wire to an external circuit; the other end of the positive dipole wire and the other end of the negative dipole wire are connected to form a joint end, and the joint end is coated with a high-temperature insulating layer.
2. The thermocouple temperature measuring device according to claim 1, characterized in that, The thermocouple temperature measuring device also includes a second protective tube made of transparent material. The diameter of the second protective tube is larger than that of the first protective tube. One end of the second protective tube is connected to the connector, and the other end of the second protective tube is interference-fitted with the end of the first protective tube closest to the connector.
3. The thermocouple temperature measuring device according to claim 2, characterized in that, The thermocouple temperature measuring device further includes a first insulating tube and a second insulating tube, both of which are disposed within the second protective tube. The portion of the positive electrode wire near the connector is disposed within the first insulating tube, and the portion of the negative electrode wire near the connector is disposed within the second insulating tube.
4. The thermocouple temperature measuring device according to claim 2, characterized in that, The length of the positive electrode wire is the same as the length of the negative electrode wire, the length of the first protective tube is less than the length of either the positive or negative electrode wire, and the length of the second protective tube is less than the length of the first protective tube.
5. The thermocouple temperature measuring device according to claim 2, characterized in that, The first protective tube and the second protective tube are standard circular tubes.
6. The thermocouple temperature measuring device according to claim 1, characterized in that, The connecting end is spherical and is located outside the first protective tube.
7. The thermocouple temperature measuring device according to claim 1, characterized in that, The end of the first protective tube furthest from the connector is cylindrical or conical.
8. The thermocouple temperature measuring device according to claim 1, characterized in that, The high-temperature insulating layer is made of a high-temperature ceramic colloid selected from silicates, aluminum sulfates, or phosphates.
9. The thermocouple temperature measuring device according to claim 2, characterized in that, The first protective tube is made of one of ceramic, mica or quartz materials, and the second protective tube is made of fluoropolymer material.
10. The thermocouple temperature measuring device according to claim 3, characterized in that, The first insulating tube and the second insulating tube are made of ceramic fiber.