Extended thermocouple and high-temperature vacuum heating furnace

Abstract

The utility model relates to the technical field of thermocouples, in particular to an extended thermocouple and a high-temperature vacuum heating furnace, and the extended thermocouple comprises a pipe sleeve and a thermocouple wire. The pipe sleeve comprises a straight section and a first bent section, the first bent section is arranged at one end of the straight section, and a temperature measuring point is arranged at the end point, deviating from the straight section, of the first bent section; and the thermocouple wire is arranged to the temperature measuring point along the straight section and the first bent section. The extended thermocouple and the high-temperature vacuum heating furnace provided by the utility model can effectively increase the length of the thermocouple wire in the temperature measurement container, thereby reducing the too fast heat loss from the temperature measurement point of the thermocouple to the external binding post, enabling the temperature measured by the temperature measurement point to be closer to the actual temperature, and improving the measurement precision of the measurement end of the thermocouple.

Description

Technical Field

[0001] This utility model relates to the field of thermocouple technology, specifically to an extended thermocouple and a high-temperature vacuum heating furnace. Background Technology

[0002] A thermocouple is a temperature sensor based on the thermoelectric effect, widely used in temperature measurement in industrial, laboratory, and household appliances.

[0003] Currently, when thermocouples used in high-temperature vacuum heating furnaces on the market are inserted into the furnace chamber for temperature measurement, the length of the measuring end inside the furnace chamber is relatively short, and the thermocouple wire inside the measuring end is also relatively short. This results in rapid heat loss when the temperature is transmitted to the outside after the temperature is monitored, which ultimately affects the deviation between the temperature measured at the measuring point and the actual temperature, resulting in low measurement accuracy. Utility Model Content

[0004] (I) This utility model provides an extended thermocouple to alleviate the technical problem of low measurement accuracy of the thermocouple measuring end in the prior art.

[0005] (II) Technical Solution

[0006] To solve the above-mentioned technical problems, embodiments of this utility model provide an extended thermocouple, including a sheath and a thermocouple wire;

[0007] The sleeve includes a straight section and a first bend section. The first bend section is located at one end of the straight section, and a temperature measuring point is provided at the end of the first bend section away from the straight section.

[0008] The thermocouple wire is continuously laid along the straight section and the first bend section to the temperature measuring point.

[0009] Furthermore, the first bend is vortex-shaped.

[0010] Furthermore, the straight section has a first cavity inside, and the first curved section has a second cavity inside, with the first cavity and the second cavity connected to each other;

[0011] The thermocouple wires are continuously arranged along the direction of the first cavity and the second cavity.

[0012] Furthermore, the straight section and the first curved section are integrally formed.

[0013] Furthermore, the sleeve also includes a second bend, which is located on the straight section. The second bend has a third cavity inside, and both ends of the third cavity are connected to the first cavity.

[0014] Furthermore, the second bend is spiral-shaped.

[0015] Furthermore, the second curved segment is integrally formed with the straight segment.

[0016] Furthermore, the extension direction of the second curved segment is the same as that of the straight segment.

[0017] Furthermore, a vacuum flange is provided at the end of the straight section opposite to the first curved section.

[0018] An embodiment of this utility model also provides an extended thermocouple, including a furnace, a heat insulation layer, and the extended thermocouple described above;

[0019] The furnace chamber is provided with an insulation layer on its outer side, and the insulation layer is provided with mounting holes. The side wall of the furnace chamber corresponding to the mounting holes is provided with reserved holes. The extended thermocouple passes through the mounting holes and the reserved holes in sequence to monitor the temperature inside the furnace chamber.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides an extended thermocouple, including a sheath and a thermocouple wire. The sheath includes a straight section and a first bend, the ends of which are connected. For temperature measurement, a temperature measuring point is provided at the other end of the first bend away from the straight section. Simultaneously, the thermocouple wire is laid inside the sheath along the direction of the straight section and the first bend to the temperature measuring point. This allows the length of the thermocouple to be extended through the first bend, thereby increasing the length of the thermocouple wire inside the temperature measuring container. This reduces the rapid heat loss from the temperature measuring point to the external terminal, making the measured temperature closer to the actual temperature and improving the measurement accuracy of the thermocouple measuring end.

[0022] This utility model also provides a high-temperature vacuum heating furnace, including a furnace chamber, a heat insulation layer, and the aforementioned extended thermocouple. The heat insulation layer is provided on the outer side of the furnace chamber, and the heat insulation layer has mounting holes. Pre-reserved holes are provided on the side wall of the furnace chamber corresponding to the mounting holes. By passing the extended thermocouple sequentially through the mounting holes and the pre-reserved holes, and finally fixing it with a vacuum flange, the extended thermocouple extends into the furnace chamber for temperature measurement. By using the aforementioned extended thermocouple, the heat loss from the temperature measuring point to the external terminal can be reduced too quickly, so that the temperature measured at the temperature measuring point is closer to the actual temperature, improving the measurement accuracy of the measuring end and enhancing the control of the temperature inside the furnace chamber by the high-temperature vacuum heating furnace. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the overall structure of an extended thermocouple provided for an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the straight section and the first bent section of an extended thermocouple provided for an embodiment of the utility model;

[0026] Figure 3 A schematic diagram of the straight section and the second bend section of an extended thermocouple provided for an embodiment of the utility model.

[0027] icon:

[0028] 100 - Straight section; 101 - First curve; 102 - Second curve;

[0029] 200 - Temperature measurement point;

[0030] 300-Vacuum Flange;

[0031] 400 - Furnace chamber; 401 - Heater. Detailed Implementation

[0032] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] like Figures 1 to 3 As shown, this utility model provides an extended thermocouple, including a sheath and a thermocouple wire;

[0036] The sleeve includes a straight section 100 and a first bend section 101. The first bend section 101 is located at one end of the straight section 100, and a temperature measuring point 200 is provided at the end of the first bend section 101 away from the straight section 100.

[0037] The thermocouple wires are continuously laid along the straight section 100 and the first bend section 101 to the temperature measuring point 200.

[0038] In this embodiment, the extended thermocouple includes a sheath and a thermocouple wire. The sheath includes a straight section 100 and a first bend section 101, with the ends of the straight section 100 and the first bend section 101 connected. For temperature measurement, a temperature measuring point 200 is provided at the other end of the first bend section 101 away from the straight section 100. Simultaneously, the thermocouple wire is laid inside the sheath along the direction of the straight section 100 and the first bend section 101 to the temperature measuring point 200. This allows the length of the thermocouple to be extended through the first bend section 101, thereby increasing the length of the thermocouple wire inside the temperature measuring container. This reduces the rapid heat loss from the temperature measuring point 200 to the external terminal, making the temperature measured at the temperature measuring point 200 closer to the actual temperature and improving the measurement accuracy of the thermocouple measuring end.

[0039] In other words, by setting the first bend 101, the length of the tube sleeve can be extended, thereby effectively extending the length of the thermocouple wires laid inside the tube sleeve in the temperature measuring furnace 400. Extending the length of the thermocouple wires in the temperature measuring furnace 400 can ensure that more subsequent temperature is continuously transmitted when the temperature measuring point 200 is transmitted to the outside after temperature measurement, thereby reducing the excessive heat loss from the temperature measuring point 200 of the thermocouple to the external terminal.

[0040] Since the extended thermocouple provided in this embodiment is mainly used to monitor the temperature inside the furnace chamber 400 of a high-temperature vacuum heating furnace, the sleeve used needs to have good resistance to high temperature, high pressure and mechanical impact. Therefore, the sleeve is set as a metal rigid tube. At the same time, the use of a metal rigid tube can reduce the temperature measurement lag, ensure the temperature measurement response speed and improve the temperature measurement accuracy by taking advantage of the good thermal conductivity of metal.

[0041] According to one embodiment provided by this utility model, such as Figure 1 and Figure 2 As shown, the first bend 101 is vortex-shaped.

[0042] In this embodiment, preferably, the first bend 101 is configured as a vortex. Since the vortex can effectively extend the length of the first bend 101 within a certain range, it can effectively increase the length of the thermocouple wires arranged in the first bend 101.

[0043] Of course, the first bend 101 can also be wavy, arc-shaped or spiral-shaped, as long as it can effectively extend the length of the thermocouple wires arranged inside. Its purpose has not deviated from the design concept of this utility model and should fall within the protection scope of this utility model.

[0044] According to one embodiment provided by this utility model, such as Figure 1 and Figure 2 As shown, the straight section 100 has a first cavity inside, and the first curved section 101 has a second cavity inside, and the first cavity and the second cavity are connected.

[0045] The thermocouple wires are continuously laid out along the direction of the first cavity and the second cavity.

[0046] In this embodiment, the straight section 100 has a first cavity inside, and the first curved section 101 has a second cavity inside. By connecting the first cavity and the second cavity, the thermocouple wire can be continuously laid out along the direction of the first cavity and the second cavity.

[0047] According to one embodiment provided by this utility model, such as Figure 1 and Figure 2 As shown, the straight section 100 and the first curved section 101 are integrally formed.

[0048] In this embodiment, in order to ensure the smooth installation of the thermocouple wires inside the sleeve, the straight section 100 and the first curved section 101 are integrally formed, which allows the thermocouple wires to be installed in one go along the direction of the first cavity inside the straight section 100 and the second cavity inside the first curved section 101.

[0049] Optionally, the plane containing the first bend 101 can be set to be perpendicular to the straight section 100. This allows the temperature measuring point 200 at the end of the first bend 101 to effectively extend the length of the tube and the length of the thermocouple wire inside the furnace 400 compared to the same monitoring position of the thermocouple without the first bend 101. This reduces the excessive heat loss from the temperature measuring point 200 to the external terminal, making the temperature measured by the temperature measuring point 200 closer to the actual temperature and improving the measurement accuracy of the thermocouple measuring end.

[0050] According to one embodiment provided by this utility model, such as Figure 1 and Figure 2 As shown, the sleeve also includes a second bend 102, which is located on the straight section 100. The second bend 102 has a third cavity inside, and both ends of the third cavity are connected to the first cavity.

[0051] In this embodiment, the sleeve also includes a second bend 102. By making the second bend 102 part of the straight section 100, and providing a third cavity inside the second bend 102, and connecting both ends of the third cavity to the first cavity, it is convenient to lay out the thermocouple wire. With the above arrangement, when the thermocouple provided in this embodiment is close to the high-current heater 401 in the furnace 400, the arrangement of the second bend 102 causes the direction of the thermocouple wire to change from parallel to the electromagnetic direction, which can reduce electromagnetic interference, improve the transmission quality of the temperature measurement signal, and more accurately display the actual temperature of the temperature measurement point 200 in the furnace 400.

[0052] According to one embodiment provided by this utility model, such as Figure 1 and Figure 2 As shown, the second bend 102 is spiral-shaped.

[0053] In this embodiment, preferably, the second bend 102 is spiral-shaped. By setting the second bend 102 as spiral, the direction of the thermocouple wires arranged in the second bend 102 can be made as close as possible to perpendicular to the electromagnetic wires generated by the heaters 401 on both sides, so as to reduce electromagnetic interference, improve the transmission quality of temperature measurement signals, and achieve more accurate display of the actual temperature of the temperature measurement point 200 in the furnace 400.

[0054] According to one embodiment provided by this utility model, such as Figure 1 and Figure 2 As shown, the second curved section 102 and the straight section 100 are integrally formed.

[0055] In this embodiment, in order to ensure the smooth installation of the thermocouple wire, the straight section 100 and the second curved section 102 are integrally formed, which allows the thermocouple wire to be installed in one go along the direction of the first cavity inside the straight section 100 and the second cavity inside the second curved section 102.

[0056] According to one embodiment provided by this utility model, such as Figure 1 and Figure 2 As shown, the extension direction of the second bend 102 is the same as that of the straight section 100.

[0057] In this embodiment, the extension direction of the second bend 102 is set to be the same as that of the straight section 100, which can ensure that the direction of the thermocouple wire can be laid out at one time, so as to make the temperature more accurate when the thermocouple wire transmits the temperature measurement signal.

[0058] Of course, by setting the extension direction of the second bend 102 to be the same as that of the straight section 100, the thermocouple wires arranged in the second bend 102 can be routed in the opposite direction of the thermocouple extension, so that they can be as close as possible to perpendicular to the electromagnetic wires generated by the heaters 401 on both sides, thereby reducing electromagnetic interference, improving the transmission quality of the temperature measurement signal, and achieving a more accurate display of the actual temperature of the temperature measurement point 200 inside the furnace 400.

[0059] According to one embodiment provided by this utility model, such as Figure 1 and Figure 2 As shown, a vacuum flange 300 is provided at the end of the straight section 100 that is away from the first bend section 101.

[0060] In this embodiment, installation via vacuum flange 300 is a highly airtight and high-pressure resistant fixing method. Therefore, a vacuum flange 300 is provided at the end of the straight section 100 away from the first bend section 101. The extended thermocouple provided in this embodiment is fixed to the furnace chamber 400 of the high-temperature vacuum heating furnace via vacuum flange 300. The whole process is very convenient. After partially removing the heat insulation layer on the outside of the furnace chamber 400, the extended thermocouple is placed in and the heat insulation layer is restored. Then it is fixed with bolts. When the extended thermocouple needs to be repaired, only the bolts need to be removed. No complicated methods such as cutting are required, making subsequent maintenance simpler.

[0061] An embodiment of this utility model also provides an extended thermocouple, including a furnace 400, a heat insulation layer, and the extended thermocouple described above;

[0062] The furnace 400 is provided with an insulation layer on the outside, and the insulation layer is provided with mounting holes. The side wall of the furnace 400 corresponding to the mounting holes is provided with reserved holes. The extended thermocouple passes through the mounting holes and the reserved holes in sequence to monitor the temperature inside the furnace 400.

[0063] In this embodiment, the high-temperature vacuum heating furnace includes a furnace chamber 400, a heat insulation layer, and the aforementioned extended thermocouple. The heat insulation layer is provided on the outer side of the furnace chamber 400, and the heat insulation layer has mounting holes. Pre-reserved holes are provided on the side wall of the furnace chamber 400 corresponding to the mounting holes. By passing the extended thermocouple sequentially through the mounting holes and the pre-reserved holes, and finally fixing it through the vacuum flange 300, the extended thermocouple extends into the furnace chamber 400 to measure the temperature. By using the aforementioned extended thermocouple, the heat loss from the temperature measuring point 200 to the external terminal can be reduced too quickly, so that the temperature measured by the temperature measuring point 200 is closer to the actual temperature, improving the measurement accuracy of the measuring end and enhancing the control of the temperature inside the furnace chamber 400 by the high-temperature vacuum heating furnace.

[0064] Of course, in order to ensure the effectiveness of the high-temperature vacuum heating furnace, the extended thermocouples used need to be calibrated regularly. For example, the fixed-point calibration method is an existing technology, so it will not be elaborated here.

[0065] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An extended thermocouple, characterized in that, Including the tubing and thermocouple wire; The sleeve includes a straight section (100) and a first bend (101), the first bend (101) is located at one end of the straight section (100), and a temperature measuring point (200) is provided at the end of the first bend (101) away from the straight section (100); The thermocouple wire is continuously laid along the straight section (100) and the first curved section (101) to the temperature measuring point (200).

2. The extended thermocouple according to claim 1, characterized in that, The first bend (101) is vortex-shaped.

3. The extended thermocouple according to claim 2, characterized in that, The straight section (100) has a first cavity inside, and the first curved section (101) has a second cavity inside, and the first cavity and the second cavity are connected. The thermocouple wires are continuously arranged along the direction of the first cavity and the second cavity.

4. The extended thermocouple according to claim 3, characterized in that, The straight section (100) and the first curved section (101) are integrally formed.

5. The extended thermocouple according to claim 3, characterized in that, The sleeve also includes a second bend (102), which is located on the straight section (100). The second bend (102) has a third cavity inside, and both ends of the third cavity are connected to the first cavity.

6. The extended thermocouple according to claim 5, characterized in that, The second bend (102) is spiral-shaped.

7. The extended thermocouple according to claim 6, characterized in that, The second curved section (102) is integrally formed with the straight section (100).

8. The extended thermocouple according to claim 7, characterized in that, The extension direction of the second curved segment (102) is the same as that of the straight segment (100).

9. The extended thermocouple according to any one of claims 1-8, characterized in that, The straight section (100) is provided with a vacuum flange (300) at the end opposite to the first curved section (101).

10. A high-temperature vacuum heating furnace, characterized in that, Includes a furnace chamber (400), a heat insulation layer, and an extended thermocouple as described in any one of claims 1-9; The furnace chamber (400) is provided with the heat insulation layer on the outside, the heat insulation layer is provided with mounting holes, and the side wall of the furnace chamber (400) corresponding to the mounting holes is provided with reserved holes. The extended thermocouple passes through the mounting holes and the reserved holes in sequence to monitor the temperature inside the furnace chamber (400).

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