A fast response multi-point temperature measuring device suitable for high temperature liquid metal

Abstract

The application discloses a kind of fast response multi-point temperature measuring device suitable for high temperature liquid metal, belong to measuring device technical field.It includes: temperature measuring device and fixed sealing device;Temperature measuring device includes thermocouple tube bundle, thermocouple wire positioning cone and thermocouple tube bundle side wall welding section;Fixed sealing device includes fixed nut, sealing ring, connecting nut, upper method flange, flange gasket, lower method flange.The sealing effect of the device is good, including two forms of flange sealing and sleeve sealing, wherein the flange position can realize the detachable demand of temperature measuring device;Thermocouple wire probe is directly contacted with fluid, and the temperature measuring result is more accurate, and the response time of thermocouple wire can be determined according to actual demand;Temperature measuring element main body is in the inside of tube bundle, and temperature measuring device will not be damaged due to large fluid flow;In addition, thermocouple wire is used as temperature measuring element, compared with armored thermocouple, cost can be greatly reduced.

Description

Technical Field

[0001] This application belongs to the field of measuring device technology, specifically relating to a fast-response multi-point temperature measuring device suitable for high-temperature liquid metal. Background Technology

[0002] Precise temperature control is crucial in liquid metal experimental systems. Due to uneven flow or heating of the experimental working fluid within the pipes, complex mixing of hot and cold fluids occurs in the manifold, leading to significant temperature fluctuations. These fluctuations cause drastic changes in internal thermal stress, and prolonged thermal stress cycling can easily induce thermal fatigue, resulting in structural damage or even failure. Therefore, accurately capturing instantaneous temperature changes during the mixing of hot and cold fluids is essential to ensuring the safe and stable operation of the equipment.

[0003] However, existing temperature measuring devices have some limitations:

[0004] Single-point measurement: Most existing temperature measuring devices are single-point measurements, which can only obtain temperature data of a local area and cannot fully reflect the temperature distribution and change trend of the entire fluid.

[0005] Non-contact measurement: Existing multi-point temperature measurement devices are mainly non-contact, such as infrared thermometers. Their measurement accuracy is greatly affected by factors such as the fluid surface condition and ambient temperature, making it difficult to accurately reflect the temperature distribution inside the fluid.

[0006] Armored thermocouples: Existing contact-type multi-point temperature measurement equipment generally uses armored thermocouples. Although the measurement accuracy is high, the response speed of armored thermocouples is relatively slow, and multiple armored thermocouples in the same measurement system may interfere with each other, affecting the measurement accuracy and stability.

[0007] To address the aforementioned technical problems, this application proposes a rapid-response multi-point temperature measurement device suitable for high-temperature liquid metals. Summary of the Invention

[0008] This application provides a fast-response multi-point temperature measurement device suitable for high-temperature liquid metals, which solves the problems existing in the current multi-point temperature measurement technology.

[0009] This application provides a rapid-response multi-point temperature measurement device suitable for high-temperature liquid metals, employing the following technical solution: including:

[0010] A temperature measuring device, comprising a thermocouple tube bundle, a thermocouple wire positioning cone, and a sidewall welding section of the thermocouple tube bundle; the thermocouple wire positioning cone and the sidewall welding section of the thermocouple tube bundle are both located at the lower part of the thermocouple tube bundle, and are at the same height and position, and are symmetrically distributed on both sides of the thermocouple tube bundle.

[0011] A fixed sealing device includes a fixing nut, a sealing ring, a connecting nut, an upper flange, a flange gasket, and a lower flange; the fixing nut, connecting nut, upper flange, and lower flange are fixedly connected from top to bottom, forming a cavity that is narrow at the top and wide at the bottom inside, for housing thermocouple tube bundles;

[0012] The sealing ring is disposed between the fixing nut and the connecting nut, and the flange gasket is disposed between the upper flange and the lower flange.

[0013] Furthermore, a lead-out section with a diameter similar to the inner diameter of the flange is welded to the bottom surface of the lower flange, and the bottom surface of the lead-out section is welded to the outside of the pipe.

[0014] Furthermore, a lead-out section is welded to the top surface of the upper flange, and an annular slice is welded above the lead-out section for welding to the bottom surface of the connecting nut.

[0015] Furthermore, the upper flange and the lower flange are the same size. The upper flange has multiple upper flange connection holes arranged in a circumferential array along its edge, and the lower flange has multiple lower flange connection holes arranged in a circumferential array along its edge. The upper flange connection holes and the lower flange connection holes are in a one-to-one correspondence. The upper flange and the lower flange are connected by multiple sets of bolts passing through the upper flange connection holes and the lower flange connection holes.

[0016] Furthermore, one end of the thermocouple tube bundle is provided with a perforated sidewall and a slotted sidewall.

[0017] Furthermore, the thermocouple wire positioning cone is placed on the perforated sidewall of the thermocouple tube bundle, and the thermocouple wire positioning cone has holes, with a one-to-one correspondence between the holes on the thermocouple wire positioning cone and the holes on the perforated sidewall; the welding section of the thermocouple tube bundle sidewall is installed on the slotted sidewall of the thermocouple tube bundle.

[0018] Furthermore, the thermocouple tube bundle sidewall welding section is cold-welded onto the slotted sidewall.

[0019] Furthermore, the inner diameter of the fixing nut is the same as the outer diameter of the thermocouple tube bundle.

[0020] Furthermore, the inner diameter of the connecting nut is the same as the inner diameter of the fixing nut, and the threads of the fixing nut and the connecting nut are matched.

[0021] Furthermore, the fixing nut has an internal slope, and the connecting nut has an upper slope on its inner diameter top surface, which is consistent with the internal slope of the nut. The sealing ring is symmetrical, with a certain slope on both its top and bottom surfaces, the size of which matches the internal slope of the nut and the upper slope of the nut. The internal slope of the nut, the sealing ring, and the upper slope of the nut are combined to form a sealing condition, creating an internal cavity that matches the outer diameter of the thermocouple tube bundle.

[0022] The beneficial effects of this application are:

[0023] 1. Fast response: Thermocouple wires have a fast response speed, which can monitor temperature fluctuations in real time and capture instantaneous temperature changes; suitable for monitoring rapid temperature changes in high-temperature liquid metals.

[0024] 2. Multi-point measurement: It can simultaneously measure temperature data at multiple points, comprehensively reflecting the temperature distribution and trend of the entire fluid; suitable for scenarios that require multi-point monitoring of fluid temperature.

[0025] 3. Accurate measurement: The thermocouple wire probe is in direct contact with the fluid, resulting in high measurement accuracy and minimal environmental influence; it can obtain precise temperature data, providing a reliable basis for experimental research and equipment control.

[0026] 4. Detachable: The temperature measuring device is detachable via flange connection, facilitating maintenance and replacement; suitable for scenarios requiring frequent replacement of temperature measuring devices, such as temperature measurement under different experimental conditions and temperature monitoring of different experimental equipment.

[0027] 5. Anti-interference: The main body of the temperature sensing element is located inside the tube bundle, and only the temperature sensing probe is in direct contact with the fluid, which effectively avoids mutual interference between multiple temperature sensing elements; it can obtain stable and reliable temperature data and is not affected by the external environment.

[0028] 6. Low cost: Compared with armored thermocouples, the cost of thermocouple wire is significantly reduced, making it economical and affordable; suitable for large-scale temperature measurement applications, reducing experimental costs.

[0029] 7. Impact Resistance: The temperature measuring device has a reasonable structural design and strong impact resistance, and will not be damaged by large fluid flow rates. It is suitable for impact and vibration situations that may occur in high-temperature liquid metal circulation systems. Attached Figure Description

[0030] For ease of explanation, this application is described in detail below with reference to specific embodiments and accompanying drawings.

[0031] Figure 1 This is a schematic diagram of the overall temperature measuring device of this application;

[0032] Figure 2 This is a cross-sectional view of the temperature measuring device of this application;

[0033] Figure 3 This is a schematic diagram of the thermocouple tube bundle of this application;

[0034] Figure 4 This is a schematic diagram of the measurement point layout in this application;

[0035] Figure 5 This is a schematic diagram of the fixing nut of this application;

[0036] Figure 6 This is a schematic diagram of the connecting nut of this application;

[0037] Figure 7 This is a general schematic diagram of the sealing device of this application;

[0038] Figure 8 This is a schematic diagram of the upper flange of this application;

[0039] Figure 9 This is a schematic diagram of the lower flange of this application;

[0040] Figure 10 This is a schematic diagram of the detachable part of the temperature measuring device of this application.

[0041] In the figure: 1. Thermocouple tube bundle, 2. Fixing nut, 3. Sealing ring, 4. Connecting nut, 5. Upper flange, 6. Flange gasket, 7. Lower flange, 8. Thermocouple wire positioning cone, 9. Welded section of the side wall of the thermocouple tube bundle.

[0042] 201. Internal thread of the nut; 202. Internal bevel of the nut;

[0043] 401. Nut thread; 402. Nut bottom surface; 403. Nut upper slope surface;

[0044] 501. Top surface of the upper flange; 502. Connection hole of the upper flange; 503. Bottom surface of the upper flange.

[0045] 701. Top surface of the lower flange; 702. Connection hole of the lower flange; 703. Bottom surface of the lower flange. Detailed Implementation

[0046] The following are specific embodiments of this application, described in conjunction with the accompanying drawings, to further illustrate the technical solutions of this application. However, this application is not limited to these embodiments. Specific details, such as particular configurations and components, are provided in the following description merely to aid in a comprehensive understanding of the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Furthermore, for clarity and brevity, descriptions of known functions and structures have been omitted.

[0047] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0048] like Figure 1-4 and Figure 8-10 The embodiment shown is a fast-response multi-point temperature measuring device suitable for high-temperature liquid metal, comprising two parts: a temperature measuring device and a fixed sealing device.

[0049] Specifically, the temperature measuring device includes a thermocouple tube bundle 1, a thermocouple wire positioning cone 8, and a sidewall welding section 9 of the thermocouple tube bundle. The thermocouple tube bundle 1 is used to wrap the thermocouple wire to form protection, and the thermocouple wire positioning cone 8 is used to fix and position the thermocouple wire and reduce interference with the fluid physical field. Both the thermocouple wire positioning cone 8 and the sidewall welding section 9 of the thermocouple tube bundle are located in the bottom area of ​​the thermocouple tube bundle 1, and both are at the same height in the vertical direction and are symmetrically distributed on both sides of the thermocouple tube bundle 1 to ensure the accuracy and stability of the measurement.

[0050] Specifically, the thermocouple tube bundle 1 structure is manufactured using traditional processes such as wire cutting and laser welding. The size of the thermocouple tube bundle 1 needs to be selected based on the number of measuring points. It should be ensured that the diameter of the thermocouple wires at all measuring points after being bundled together is smaller than the inner diameter of the thermocouple tube bundle 1, and a certain amount of extra space should be reserved. In actual operation, the size of the thermocouple tube bundle 1 can be flexibly adjusted by adjusting the number of thermocouple measuring points, thereby reducing the impact of the introduction of multi-point temperature measuring devices on the fluid physical field.

[0051] Specifically, the thermocouple wire positioning cone 8 is made into a mold that matches the thermocouple tube bundle 1 using 3D printing technology, and then removed after being filled with high-temperature resistant ceramic glue and allowed to solidify.

[0052] Specifically, the fixed sealing device consists of a fixing nut 2, a sealing ring 3, a connecting nut 4, an upper flange 5, a flange gasket 6, and a lower flange 7. The fixing nut 2 is installed above the connecting nut 4, and the sealing ring 3 is placed between the two to achieve a sealing effect. The fixing nut 2, sealing ring 3, connecting nut 4, upper flange 5, and lower flange 7 are fixedly connected from top to bottom, forming a cavity structure that is narrow at the top and wide at the bottom. This cavity structure is used to accommodate the thermocouple tube bundle 1.

[0053] Specifically, the flange gasket 6 is placed between the upper flange 5 and the lower flange 7. Its material can be graphite, copper sheet, or polytetrafluoroethylene, depending on the actual situation, to ensure the sealing performance of the entire device.

[0054] In other preferred embodiments, such as Figure 8 and Figure 9 As shown, Figure 8As shown, the upper flange 5 includes an upper flange top surface 501, an upper flange connecting hole 502, and an upper flange bottom surface 503. The inner diameter of the upper flange 5 should allow the temperature measuring device to move freely up and down inside the upper flange 5. The upper flange top surface 501 is welded with a lead-out section, and an annular slice is welded above the lead-out section for welding with the bottom surface 402 of the connecting nut to form an integral unit.

[0055] Specifically, the lower flange 7 includes a lower flange top surface 701, a lower flange connecting hole 702, and a lower flange bottom surface 703. A lead-out section with a diameter similar to the inner diameter of the flange is welded to the bottom surface of the lower flange 7. The bottom surface of the lead-out section is welded to the outside of the pipe and welded together with the experimental pipe. The main function of the lower flange 7 is to enable the detachability of the temperature measuring device, rather than for sealing. The ferrule composed of the fixing nut 2, the sealing ring 3, and the connecting nut 4 can achieve the sealing function. During installation, the sealing device can be tightened first to facilitate the adjustment of the thermocouple wire positioning cone 8 facing the direction of fluid flow, ensuring the accuracy of temperature measurement.

[0056] In other preferred embodiments, the upper flange 5 and the lower flange 7 are the same size. The upper flange 5 has a plurality of upper flange connection holes 502 arranged in a circular array around its edge, and the lower flange 7 has a plurality of lower flange connection holes 702 arranged in a circular array around its edge. The upper flange connection holes 502 and the lower flange connection holes 702 are in a one-to-one correspondence. The upper flange 5 and the lower flange 7 are connected by multiple sets of bolts passing through the upper flange connection holes 502 and the lower flange connection holes 702.

[0057] Specifically, the upper flange 5 and the lower flange 7 are connected by multiple sets of bolts passing through the upper flange connection hole 502 and the lower flange connection hole 702 to ensure a firm and reliable connection.

[0058] In other preferred embodiments, one end of the thermocouple tube bundle 1 is provided with a perforated sidewall and a slotted sidewall.

[0059] Specifically, one end of the thermocouple tube bundle 1 is an open end and the other end is a sealed end. The sealed end of the thermocouple tube bundle 1 is the location of the fluid temperature measuring point, which is the lower end of the thermocouple tube bundle 1. One side wall of the lower end of the thermocouple tube bundle 1 has multiple holes and is called a perforated side wall. The other side wall has a groove and is called a slotted side wall.

[0060] Specifically, the manufacturing process of the temperature measuring device is as follows: The thermocouple tube bundle 1 is processed using traditional processes such as wire cutting and laser welding. The thermocouple wire positioning cone 8, made of high-temperature resistant ceramic adhesive, is attached to the thermocouple tube bundle 1 using a mold. After the thermocouple wire is inspected and found to be normal, one end of the temperature measuring probe is inserted from the opening at the top of the thermocouple tube bundle 1, ensuring that the temperature measuring probe only protrudes about 1mm at each measuring point to ensure accurate temperature measurement. After the thermocouple is inserted, the empty part inside the thermocouple tube bundle 1 is filled with high-temperature resistant ceramic adhesive to form a seal. Finally, the thermocouple tube bundle 1 and the side wall welding section 9 of the thermocouple tube bundle are combined into one unit using cold welding technology to form a seal, ensuring good sealing performance.

[0061] Specifically, the thermocouple wire positioning cone 8 is placed on the perforated sidewall of the thermocouple tube bundle 1, and the thermocouple wire positioning cone 8 has holes, with a one-to-one correspondence between the holes on the thermocouple wire positioning cone 8 and the holes on the perforated sidewall; the thermocouple tube bundle sidewall welding section 9 is installed on the slotted sidewall of the thermocouple tube bundle 1.

[0062] Specifically, it is recommended that the hole size on the thermocouple wire positioning cone 8 be set to 1-1.5mm, and the specific number can be determined according to the actual situation, but in principle, there should be no less than two thermocouple wires.

[0063] In other preferred embodiments, the inner diameter of the connecting nut 4 is the same as the inner diameter of the fixing nut 2, the threads of the fixing nut 2 and the connecting nut 4 are matched, and the inner diameter of the fixing nut 2 is the same as the outer diameter of the thermocouple tube bundle 1.

[0064] Specifically, the inner diameter of the connecting nut 4 is the same as the inner diameter of the fixing nut 2, and the inner diameter of the fixing nut 2 is the same as the outer diameter of the thermocouple tube bundle 1, so as to achieve a tight fit, ensure good sealing, and ensure the stability of the fixation.

[0065] In other preferred embodiments, such as Figure 5-7 As shown, the fixing nut 2 has an internal slope 202, and the connecting nut 4 has an upper slope 403 on its inner diameter top surface, which is consistent with the internal slope 202 of the nut. The sealing ring 3 is symmetrical, and its top and bottom surfaces have a certain slope, the size of which matches the internal slope 202 of the nut and the upper slope 403 of the nut. The internal slope 202 of the nut, the sealing ring 3 and the upper slope 403 of the nut are combined to form a sealing condition, forming an internal cavity that matches the outer diameter of the thermocouple tube bundle 1.

[0066] Specifically, the structure of the fixing nut 2 can be seen in the image. Figure 5It includes the internal thread 201 and the internal slope 202 of the nut; wherein, one end of the fixing nut 2 is open and the other end has a small hole with the same diameter as the outer diameter of the thermocouple tube bundle 1, and the inside is threaded, and the inner wall of the fixing nut 2 is provided with the internal slope 202 of the nut.

[0067] Specifically, the structure of connecting nut 4 can be seen in the image. Figure 6 It includes a threaded surface 401, a bottom surface 402, and an upper slope surface 403 of the nut; wherein, the thread 401 of the connecting nut matches the internal thread 201 of the nut; the top of the connecting nut 4 is provided with an upper slope surface 403, the size of which is the same as the size of the internal slope surface 202 of the nut; the bottom surface 402 of the nut is welded to the top surface 501 of the upper flange to form an integral unit; the inner diameter of the connecting nut 4 matches the outer diameter of the thermocouple tube bundle 1.

[0068] Specifically, the structure of sealing ring 3 can be seen... Figure 7 The sealing ring 3 is symmetrical, with bevels on both the top and bottom surfaces, and the dimensions of these bevels are consistent with the dimensions of the inner bevel 202 of the nut and the upper bevel 403 of the nut; the combination order and method of the three are shown in the figure. Figure 7 The threaded surface 201 of the fixing nut and the threaded surface 401 of the connecting nut can be coupled to each other. After the fixing nut 2 is tightened along the thread direction, the sealing ring 3 will be squeezed and deformed, so that it fits tightly against the thermocouple tube bundle 1, thereby achieving a sealing effect.

[0069] The installation process of the device using the technical solution of this application is as follows:

[0070] Determine the dimensions of each component according to the actual situation, complete the processing and fabrication of the temperature measuring device; determine the cross-section of the fluid temperature to be measured, drill a hole above the pipe, and weld the bottom surface 703 of the lower flange to the pipe; put the upper flange 5, connecting nut 4, and fixing nut 2 on the outside of the thermocouple tube bundle 1, and weld the bottom surface 402 of the nut to the top surface 501 of the upper flange; adjust the direction of the thermocouple tube bundle 1, ensure that the sealing ring 3 is in the accurate position, and tighten the fixing nut 2, paying attention to the direction of the thermocouple wire positioning cone 8 facing the direction of fluid flow during the process; place the thermocouple tube bundle 1 through the lower flange 7 into the experimental pipe, and tighten the multiple sets of bolts of the upper flange 5 and the lower flange 7; at this point, the entire invention device is assembled.

[0071] After the experiment, to facilitate the reuse of the rapid-response multi-point temperature measuring device and the modification and processing of the experimental pipeline, the temperature measuring device can be disassembled; the specific structure after disassembly can be seen in [the image / description]. Figure 10 That is, except for the flange 7 at the bottom which is connected to the pipe, the rest of the entire invention device can be disassembled as a whole, so that the multi-point temperature measuring device can be used multiple times.

[0072] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0073] In the description of this application, it should be understood that the terms "upper" and "lower" 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 application 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 application.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] Those skilled in the art to which this application pertains may make various modifications or additions to the specific embodiments described, or adopt similar methods to replace them, without departing from the spirit of this application or exceeding the scope defined by the appended claims.

Claims

1. A fast response multi-point temperature measuring device for high temperature liquid metal, characterized in that, The utility model relates to a temperature measuring device, and it comprises a thermocouple tube bundle, a thermocouple wire positioning cone and a thermocouple tube bundle side wall welding section. The fixed sealing device comprises a fixed nut, a sealing ring, a connecting nut, an upper method flange, a flange gasket and a lower method flange. The sealing ring is arranged between the fixed nut and the connecting nut, and the flange gasket is arranged between the upper method flange and the lower method flange. The thermocouple tube bundle is provided with a perforated side wall and a slotted side wall at one end. The thermocouple wire positioning cone is arranged on the perforated side wall of the thermocouple tube bundle, and the thermocouple wire positioning cone is provided with a hole. The hole on the thermocouple wire positioning cone and the hole of the perforated side wall are in one-to-one correspondence. The thermocouple tube bundle side wall welding section is installed on the slotted side wall of the thermocouple tube bundle.

2. The fast response multi-point temperature measuring device for high temperature liquid metal according to claim 1, wherein The thermocouple wire positioning cone is used for fixing and positioning the thermocouple wire and reducing the interference with the fluid physical field.

3. The fast response multi-point temperature measurement device for high temperature liquid metal according to claim 2, wherein The bottom surface of the lower method flange is welded with a lead-out section with a diameter close to that of the flange.

4. The fast response multi-point temperature measuring device for high temperature liquid metal according to claim 3, wherein The top surface of the upper method flange is welded with a lead-out section, and the upper surface of the lead-out section is welded with an annular slice for welding with the bottom surface of the connecting nut.

5. The fast response multi-point temperature measurement device for high temperature liquid metal according to claim 1, wherein The upper method flange and the lower method flange have the same size, and the upper method flange is provided with a plurality of upper method flange connecting holes in the circumferential array at the edge.

6. The fast response multi-point temperature measurement device for high temperature liquid metal according to claim 1, wherein The lower method flange is provided with a plurality of lower method flange connecting holes in the circumferential array at the edge.

7. A fast response multi-point temperature measurement device for high temperature liquid metal according to claim 6, wherein The upper method flange and the lower method flange are connected through a plurality of bolts passing through the upper method flange connecting holes and the lower method flange connecting holes.

8. The fast response multi-point temperature measurement device for high temperature liquid metal according to claim 7, wherein The thermocouple tube bundle side wall welding section is welded on the slotted side wall through cold welding. The inner diameter of the fixed nut is the same as the outer diameter of the thermocouple tube bundle. The inner diameter of the connecting nut is the same as the inner diameter of the fixed nut, and the fixed nut and the connecting nut are threadedly matched. The fixed nut is internally provided with a nut internal slope surface, and the top surface of the inner diameter of the connecting nut is provided with a nut upper slope surface. The sealing ring is symmetrically arranged on the top surface and the bottom surface, and the top surface and the bottom surface have a certain slope. The nut internal slope surface, the sealing ring and the nut upper slope surface are combined together to form a sealing condition and form a cavity inside, which is matched with the outer diameter of the thermocouple tube bundle.

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