Temperature measurement structure based on ceramic metal welding and use method thereof

Abstract

The invention relates to the field of temperature measuring devices, in particular to a temperature measuring structure based on ceramic metal welding and a using method thereof.The temperature measuring structure comprises a heating plate attached to a reactor core, protecting the reactor core and conducting the reaction temperature of the reactor core, and a heat conduction assembly arranged on the face, away from the reactor core, of the heating plate; the temperature measuring assembly is used for measuring the temperature of a reactor core; wherein the temperature of the heating plate is conducted through the heat conduction assembly, and the part, attached to the heating plate, of the heat conduction assembly is made of an insulating material; the temperature measurement assembly comprises an installation part and a measurement part, the measurement part is arranged in the installation part in a penetrating mode, and one end of the measurement part abuts against the heat conduction assembly. The method and the device have the effects of reducing interference and accurately sensing and / or identifying the temperature rising.

Description

Technical Field

[0001] The present application relates to the field of temperature measuring devices, and in particular to a temperature measuring structure based on ceramic-metal welding and a method of using the same. Background Art

[0002] The reactor core is the core component of the reactor, which is used to generate the heat source required by the system. The core has strong radioactivity and is composed of several fuel assemblies of the same size and square cross-section. The reactor body consists of the reactor pressure vessel, metal internals, graphite and carbon brick internals, a pebble bed core composed of fuel elements, control rods and their drive mechanisms, and an absorber ball shutdown system. Also directly related to the core are hot gas ducts, steam generators, ammonia blowers, fuel loading and unloading systems, helium purification systems, etc.

[0003] In the reactor core design, the rectangular channel has a larger heating area than the traditional rod bundle channel at the same power level, which can greatly reduce the center temperature of the fuel element and the thermal inertia of the fuel element, thereby effectively alleviating the severity of the accident. Therefore, it has better thermal hydraulic performance and safety. Critical heat flux (CHF) is one of the most important limits in the thermal design of nuclear reactors. In the design of nuclear reactors, it is necessary to obtain as high an output power as possible while ensuring the safety of fuel elements. Because the mechanism of critical heat flux (CHF) is extremely complex, a series of related experiments need to be carried out in a targeted manner. During the experiment, a metal plate is generally used to directly energize and heat to simulate nuclear heat release, and the temperature rise of the heating surface in high-temperature and high-pressure water is monitored to determine whether the critical heat flux occurs. Therefore, it is necessary to develop a temperature measurement structure that can be used to quickly respond to and monitor the surface temperature of a metal plate that is directly energized.

[0004] At present, there are two main temperature measurement structures. One is to fix the top of the temperature measuring thermocouple to the position to be monitored, such as the surface of a pipeline or container, by using a metal pressing plate or welding. In this method, the temperature measuring thermocouple is in direct contact with the energized metal plate and is charged, which will cause obvious interference to the measurement. Secondly, the temperature measuring point is immersed in water within the pressure boundary, and it is impossible to accurately sense the temperature rise of the heating surface; the second is to weld the thermocouple sleeve and the flow channel to form a pressure boundary, and then pass the temperature measuring thermocouple along the sleeve to the required position. In this method, the thermocouple sleeve is directly welded to the metal plate, which causes a significant change in the local resistance of the metal plate, thereby changing the heating power distribution and causing distortion of the experimental data. Secondly, the simple insertion of the temperature measuring thermocouple cannot ensure that the top is tightly fitted with the heating surface, resulting in a slow temperature response speed, which is not conducive to the identification of temperature rise. Summary of the invention

[0005] In order to reduce interference and accurately sense and / or identify temperature rise, the present application provides a temperature measurement structure based on ceramic-metal welding and a method for using the same.

[0006] The present application provides a temperature measurement structure based on ceramic-metal welding and a method of using the same, which adopts the following technical solutions:

[0007] A temperature measurement structure based on ceramic-metal welding, comprising:

[0008] A heating plate is arranged close to the reactor core and is used to conduct the reaction temperature of the reactor core;

[0009] A heat conduction component is arranged on a side of the heating plate away from the reactor core, and the temperature of the heating plate is conducted through the heat conduction component;

[0010] The temperature measuring component comprises a mounting portion and a measuring portion, wherein the measuring portion is inserted into the mounting portion and one end of the measuring portion abuts against the heat conducting component;

[0011] Wherein, the heat-conducting component is insulated from the heating plate and the temperature measuring component.

[0012] By adopting the above technical scheme, during the reaction of the reactor core, the heating plate releases a large amount of heat energy through the nuclear reaction, the heat energy of the heating plate is conducted through the heat-conducting component, and is measured by the temperature measuring component; during the temperature measurement process, the insulating material on the heat-conducting component can make the heat-conducting component avoid being electrified during the temperature measurement process while meeting the requirements of high thermal conductivity, the heat is transferred by the heat-conducting component, one end of the measuring part in the temperature measuring component abuts against the heat-conducting component, and the temperature of the reactor is measured by measuring the temperature of the heat-conducting component.

[0013] Preferably, the heat conduction component includes a heat conduction plate and transition layers arranged on both sides of the heat conduction plate, the transition layer located on one side of the heat conduction plate is in contact with the heating plate, and the heating plate is insulated from the transition layer.

[0014] By adopting the above technical solution, the transition layer is set on both sides of the heat conducting plate to firstly play a good thermal conductivity role. Secondly, the insulation between the heating plate and the transition layer can play a good thermal conductivity role while avoiding electrification during the temperature measurement process. In addition, the setting of the transition layer can isolate the flowing water or steam on the outside, ensuring that the measured temperature signal is not interfered by water or steam, thereby accurately sensing the temperature rise of the heating surface.

[0015] Preferably, the outer edge size of the heat conducting plate is larger than the size of the transition layer, the heat conducting plate is a heat conducting insulating plate, the transition layer is a metal plate, and the transition layers on both sides of the heat conducting plate are insulated.

[0016] By adopting the above technical solution, the outer edge size of the heat conducting plate is larger than the transition layer size, so that the heat conducting plate can contact the heat source or heat dissipation area with a larger area, thereby collecting and transferring heat more effectively; the heat conducting insulating plate has good thermal conductivity and can quickly conduct heat from the heat source to the transition layer, thereby improving the efficiency of heat conduction. While conducting heat, the heat conducting plate increases insulation performance and effectively prevents safety problems such as electrical short circuits. Especially in occasions such as electronic equipment that have high requirements for electrical insulation, this design can ensure the safe operation of the circuit; the outer edge size of the heat conducting plate is large, which can provide better support and stability for the entire structure. When subjected to external pressure or vibration, the heat conducting plate can disperse stress and reduce the impact on the transition layer and other components; the metal transition layer has a certain strength and rigidity, which can enhance the mechanical strength of the entire structure and improve its ability to resist deformation and damage, thereby meeting the needs of heat conduction and ensuring electrical insulation.

[0017] Preferably, the mounting portion comprises a temperature measuring base plate and a sleeve which are fixedly attached to the heat conducting component, the position of the sleeve is arranged according to the temperature measuring point, and a temperature measuring hole is provided on the temperature measuring base plate, and the temperature measuring hole corresponds to the sleeve;

[0018] The measuring part passes through the sleeve and the temperature measuring hole in sequence until one end of the temperature measuring part abuts against the temperature measuring bottom plate.

[0019] By adopting the above technical solution, by setting a temperature measuring base plate that is fitted and fixed to the heat-conducting component, it can be ensured that the heat at the temperature measuring point can be quickly and accurately transferred to the temperature measuring base plate; because one end of the temperature measuring part is in contact with the temperature measuring base plate, the temperature measuring part can directly obtain the temperature information from the temperature measuring point, which greatly improves the fit and fixation of the temperature measuring base plate and the heat-conducting component, ensures the stability of the entire installation part during operation, avoids easy movement of the position due to external vibration or other factors, and ensures the reliability of temperature measurement; at the same time, the setting of the sleeve provides support and guidance for the measuring part, making the measuring part more stable during the insertion process. The casing and the temperature measuring holes can be set at different positions according to the temperature distribution of the specific equipment or system to realize the monitoring of multiple key temperature measuring points. The structural design is relatively simple and the installation process is relatively convenient. The corresponding setting of the casing and the temperature measuring holes provides an accurate channel for the measuring part, ensuring that the measuring part can accurately reach the temperature measuring point, further enhancing the accuracy of the temperature measurement.

[0020] Preferably, the measuring part is a temperature measuring couple, a plurality of the sleeves are provided, each sleeve has a temperature measuring couple inserted therein, the temperature measuring couple is fixed to the sleeve by a fixing component, and the fixing component has an installation space for the temperature measuring couple to pass through.

[0021] By adopting the above technical scheme, the thermometric couple has high accuracy and stability and can accurately measure the temperature. At the same time, the setting of multiple thermometric couples can perform multi-point temperature measurement at different positions, more comprehensively reflect the temperature distribution of the object being measured, and improve the accuracy of temperature measurement. The thermometric couple is fixed to the sleeve by a fixing component to ensure that the thermometric couple will not shake or shift during the measurement process, thereby ensuring the stability of the measurement result; the installation space opened on the fixing component can accommodate thermometric couples of different specifications, thereby improving the versatility and compatibility of the device. The thermometric couple is fixed to the sleeve by the fixing component, and the installation process is simple and convenient. During maintenance, if the thermometric couple or the fixing component needs to be replaced, it can be easily disassembled and replaced, thereby reducing the maintenance cost and difficulty.

[0022] Preferably, the fixing assembly comprises a pressing block and a pressing spring, one end of the pressing spring is fixed to the pressing block, and the other end is fixed to the middle part of the sleeve.

[0023] By adopting the above technical scheme, the combination of the pressure block and the compression spring can provide continuous and stable pressure for the thermometric couple, ensuring that the thermometric couple is firmly fixed in the casing, so that the thermometric couple will not easily loosen or shift if vibration, shaking or other external force interference occurs during the operation of the equipment, thereby ensuring the accuracy and stability of temperature measurement; at the same time, thermometric couples of different specifications can be easily replaced to reduce costs. When installing the thermometric couple, you only need to insert the thermometric couple into the casing, and the pressure block will automatically compress the thermometric couple under the action of the compression spring, and the installation process is simple and quick.

[0024] Preferably, a guide groove is provided on a side of the pressing block facing the sleeve;

[0025] The end of the sleeve is inserted into the guide groove.

[0026] By adopting the above technical scheme, the guide groove on the pressing block provides a clear positioning position for the end of the sleeve. When installing, the end of the sleeve is inserted into the guide groove, which can ensure that the relative position of the pressing block and the sleeve is accurate, thereby ensuring that the clamping spring can apply pressure in the correct direction, making the fixation of the temperature measuring couple in the sleeve more stable and reliable; after the end of the sleeve is inserted into the guide groove, during the operation of the equipment, it can effectively prevent relative displacement or shaking between the pressing block and the sleeve, reducing the temperature measurement error caused by loose fixation, and the cooperation of the guide groove and the sleeve can resist external force interference from different directions, ensuring that the temperature measuring couple always remains in the correct position, thereby improving the accuracy of temperature measurement.

[0027] Preferably, at least one pressing piece hole is provided on the pressing block, and a pressing piece is inserted into the pressing piece hole;

[0028] The pressing piece hole is communicated with the installation space, and the pressing piece passes through the pressing piece hole and abuts against the temperature measuring couple.

[0029] By adopting the above technical scheme, on the basis of the pressure block and the clamping spring, the clamping piece further ensures the stable position of the thermocouple in the sleeve, and can effectively prevent the thermocouple from loosening or shifting even under strong vibration or external force impact, thereby improving the accuracy and stability of temperature measurement. The setting of multiple fixed points (pressure block, clamping spring and clamping piece) works together to make the fixation of the thermocouple more firm and reliable, reducing the risk of measurement error caused by changes in the position of the thermocouple. According to the actual application scenario and the characteristics of the thermocouple, the appropriate clamping piece can be flexibly selected to meet different fixing requirements.

[0030] A method for using a temperature measurement structure based on ceramic-metal welding, characterized in that it comprises the steps of:

[0031] Confirm the distribution of reactor core temperature measurement points and determine the size of the heat transfer plate;

[0032] Attach transition layers to the upper and lower surfaces of the heat conducting plate;

[0033] Confirm the size of the temperature measuring base plate according to the reactor core temperature measuring points;

[0034] Open holes in the temperature measuring bottom plate according to the positions of the reactor core temperature measuring points;

[0035] Install the sleeve at the corresponding opening position of the temperature measuring bottom plate;

[0036] Process the fixing assembly with the thermocouple according to the size of the casing;

[0037] Insert the temperature measuring couple into the sleeve and fix it by the fixing assembly.

[0038] By adopting the above technical solution, the distribution of the temperature measuring points of the reactor core is confirmed and the size of the heat conducting plate is determined, so that the heat conducting plate can better adapt to the temperature measurement requirements of the core, wherein the heat conducting plate can effectively conduct the heat of the core to the temperature measuring point to ensure the accuracy of the temperature measurement; the temperature measuring bottom plate is opened and the sleeve is installed, and the fixing component is processed according to the size of the sleeve, so that the temperature measuring couple can be accurately installed at the temperature measuring point position, and the close contact between the temperature measuring couple and the temperature measuring bottom plate ensures the accuracy of the temperature measurement. This method of use has clear steps, from confirming the distribution of the temperature measuring points to installing the temperature measuring couple, the operator can install it in an orderly manner according to the steps, which can improve the installation efficiency. At the same time, it can be processed and installed according to different component sizes to ensure the matching degree between the various components. For example, when facing a complex core structure or special temperature measurement requirements, they can be met by adjusting the parameters such as the size of the heat conducting plate and the position of the opening of the temperature measuring bottom plate, and the processing of the fixing component can be adjusted according to the size of the sleeve to adapt to temperature measuring couples and sleeves of different specifications, so as to be suitable for various reactor types and working environments.

[0039] Preferably, the processing of the fixed component with the temperature measuring couple comprises the steps of:

[0040] Processing guide grooves and pressing piece holes on the pressing block;

[0041] Fix one end of the compression spring to the side wall of the casing;

[0042] Place the pressing block on the upper part of the sleeve so that the sleeve is clamped in the guide groove;

[0043] Fix the other end of the compression spring on the compression block;

[0044] The temperature measuring couple passes through the pressing block and the sleeve until one end abuts against the temperature measuring point;

[0045] A pressing piece is inserted into the pressing piece hole to fix the temperature measuring thermocouple.

[0046] By adopting the above technical scheme, a guide groove is processed on the pressing block, so that the sleeve can be accurately clamped in the guide groove, ensuring the relative position between the pressing block and the sleeve is accurate. When the sleeve is clamped in the guide groove, the pressing block can always act on the temperature measuring couple in the correct direction when applying pressure, avoiding unstable fixation or inaccurate temperature measurement due to position deviation; the clamping piece hole provides an accurate installation position for the clamping piece, and the clamping piece directly acts on the temperature measuring couple through the clamping piece hole, thereby enhancing the fixing effect of the temperature measuring couple; this installation method enables the operator to quickly and accurately install the temperature measuring couple in place, thereby improving the installation efficiency. At the same time, when maintenance or replacement of the temperature measuring couple is required, the temperature measuring couple can be easily taken out by simply removing the clamping piece, thereby improving the maintainability of the equipment.

[0047] In summary, the present application includes at least one of the following beneficial technical effects:

[0048] 1. During the reactor core reaction, the heating plate releases a large amount of heat energy through nuclear reaction, and the heat energy of the heating plate is conducted through the heat conducting component and measured by the temperature measuring component; during the temperature measurement process, the insulating material on the heat conducting component can make the heat conducting component avoid being electrified during the temperature measurement process while meeting the high thermal conductivity. The heat is transferred by the heat conducting component, and one end of the measuring part in the temperature measuring component is in contact with the heat conducting component, and the temperature of the reactor is measured by measuring the temperature of the heat conducting component. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 is a front cross-sectional schematic diagram of a temperature measurement structure in an embodiment of the present application;

[0050] Figure 2 It is a cross-sectional schematic diagram showing the structure of the fixed component.

[0051] Explanation of the reference numerals: 1. heating plate; 2. heat-conducting component; 21. heat-conducting plate; 22. transition layer; 3. temperature measuring component; 31. mounting portion; 311. temperature measuring base plate; 312. sleeve; 32. measuring portion; 33. fixing component; 331. pressing block; 3311. guide groove; 3312. pressing member hole; 3313. mounting space; 332. pressing spring; 333. pressing member. DETAILED DESCRIPTION

[0052] The following is combined with Figure 1-2 This application is described in further detail.

[0053] The embodiment of the present application discloses a temperature measurement structure based on ceramic metal welding and a method of using the same. Figure 1 The temperature measurement structure based on ceramic metal welding includes a heating plate 1 arranged in contact with the reactor core, a heat conducting component 2 arranged on the side of the heating plate 1 away from the reactor core, and a temperature measuring component 3 with one end abutting against the heat conducting component 2 for temperature measurement. The heating plate 1 is used to conduct the reaction temperature of the reactor core, and the temperature of the heating plate 1 is conducted through the heat conducting component 2, and the heat conducting component 2 is insulated from the heating plate 1 and the temperature measuring component 3.

[0054] The heat conducting assembly 2 includes a heat conducting plate 21 and transition layers 22 arranged on both sides of the heat conducting plate 21. The transition layer 22 located on one side of the heat conducting plate 21 is attached to the heating plate 1, and the heating plate 1 is insulated from the transition layer 22. The transition layer 22 is arranged on both sides of the heat conducting plate 21. Firstly, it is necessary to have a good heat conducting effect. Secondly, the insulation between the heating plate 1 and the transition layer 22 can achieve a good heat conducting effect while avoiding electrification during the temperature measurement process. In addition, the setting of the transition layer 22 can isolate the external flowing water or steam, ensuring that the measured temperature signal is not interfered by water or steam, thereby accurately sensing the temperature rise of the heating surface.

[0055] In an optional embodiment, the outer edge size of the heat conducting plate 21 is larger than the size of the transition layer 22 , the heat conducting plate 21 is a heat conducting insulating plate, the transition layer 22 is a metal plate, and the transition layers 22 on both sides of the heat conducting plate 21 are insulated. Among them, the outer edge size of the heat conducting plate 21 is larger than that of the transition layer 22, so that the heat conducting plate 21 can contact the heat source or heat dissipation area with a larger area, thereby collecting and transferring heat more effectively; the heat conducting insulating plate has good thermal conductivity, which can quickly conduct heat from the heat source to the transition layer 22, thereby improving the efficiency of heat conduction. While conducting heat, the heat conducting plate 21 increases the insulation performance, effectively preventing safety problems such as electrical short circuits, especially in occasions such as electronic equipment that have high requirements for electrical insulation. This design can ensure the safe operation of the circuit; the outer edge size of the heat conducting plate 21 is large, which can provide better support and stability for the entire structure. When subjected to external pressure or vibration, the heat conducting plate 21 can disperse stress and reduce the impact on the transition layer 22 and other components; the metal transition layer 22 has a certain strength and rigidity, which can enhance the mechanical strength of the entire structure and improve its ability to resist deformation and damage, which not only meets the needs of heat conduction but also ensures electrical insulation.

[0056] In an optional embodiment, the heat conducting plate 21 is a ceramic substrate, and the transition layer 22 is a high-resistance flexible alloy foil. The heat conducting plate 21 and the transition layer 22 have good compatibility. The transition layer 22 provides a good welding transition between the heat conducting plate 21 and the heating plate 1 to ensure reliable welding. In a preferred embodiment, the heat conducting plate 21 can be selected as a 99% aluminum oxide ceramic thin plate, and the heating plate 1 can be made of Kovar alloy. When used, the above two materials have similar thermal expansion coefficients, which can ensure that the relative deformation of each component during the temperature change is extremely small and does not cause damage. The flexible characteristics of the transition layer 22 can absorb the thermal stress generated by temperature changes during welding and use, ensuring that the temperature measurement structure does not deform or damage; the high resistance characteristics and relatively small thickness of the transition layer 22 can ensure that there is no measurable change in the local resistance of the heating plate 1, and the relatively small thickness and low thermal resistance of the transition layer 22 can ensure that the temperature is quickly transferred.

[0057] The mounting part 31 includes a temperature measuring base plate 311 and a sleeve 312 which are fixedly attached to the heat conducting component 2. The position of the sleeve 312 is set according to the temperature measuring point. The temperature measuring base plate 311 is provided with a temperature measuring hole, which corresponds to the sleeve 312. The measuring part 32 passes through the sleeve 312 and the temperature measuring hole in sequence until one end of the temperature measuring part abuts against the temperature measuring base plate 311. By setting the temperature measuring base plate 311 which is fixedly attached to the heat conducting component 2, it can be ensured that the heat at the temperature measuring point can be quickly and accurately transferred to the temperature measuring base plate 311. Since one end of the temperature measuring part abuts against the temperature measuring base plate 311, the temperature measuring part can directly obtain the temperature information from the temperature measuring point, which greatly improves the attachment and fixation of the temperature measuring base plate 311 and the heat conducting component 2, ensures the stability of the entire mounting part 31 during operation, avoids easy movement of the position due to external vibration or other factors, and ensures the reliability of temperature measurement.

[0058] At the same time, the setting of the sleeve 312 provides support and guidance for the measuring part 32, making the measuring part 32 more stable during the insertion process and not easy to deviate from the temperature measurement point, ensuring stability during long-term use. The position of the sleeve 312 can be set according to the needs of the temperature measurement point, which enables the device to adapt to different temperature measurement scenarios and requirements, with high flexibility and versatility. The sleeve 312 and the temperature measurement hole can be set at different positions according to the temperature distribution of the specific equipment or system to realize the monitoring of multiple key temperature measurement points; this structural design is relatively simple and the installation process is relatively convenient. The corresponding setting of the sleeve 312 and the temperature measurement hole provides an accurate channel for the measuring part 32, ensuring that the measuring part 32 can accurately reach the temperature measurement point position, further enhancing the accuracy of temperature measurement. Optionally, the sleeve 312, the temperature measurement bottom plate 311 and the heat conducting plate 21 form a pressure boundary to achieve the isolation of the measuring part 32 from the outer flowing water or steam, ensuring that the temperature signal measured by the measuring part 32 is not interfered by water or steam, thereby accurately sensing the temperature rise of the heating surface. Optionally, the sleeve 312 and the temperature measuring base plate 311 are connected by welding.

[0059] In an optional embodiment, the measuring part 32 is a temperature measuring couple, and a plurality of sleeves 312 are provided. A temperature measuring couple is inserted in each sleeve 312. The temperature measuring couple is fixed to the sleeve 312 through a fixing component 33. The fixing component 33 is provided with an installation space 3313 for the temperature measuring couple to pass through. The thermometric couple has high precision and stability and can accurately measure temperature. At the same time, the setting of multiple thermometric couples can perform multi-point temperature measurement at different positions, more comprehensively reflect the temperature distribution of the object being measured, and improve the accuracy of temperature measurement. The thermometric couple is fixed to the sleeve 312 through the fixing component 33 to ensure that the thermometric couple will not shake or shift during the measurement process, thereby ensuring the stability of the measurement result; the installation space 3313 opened on the fixing component 33 can accommodate thermometric couples of different specifications, thereby improving the versatility and compatibility of the device. The thermometric couple is fixed to the sleeve 312 through the fixing component 33, and the installation process is simple and convenient. During maintenance, if the thermometric couple or the fixing component 33 needs to be replaced, it can be easily disassembled and replaced, thereby reducing the maintenance cost and difficulty.

[0060] Reference Figure 2 In an optional embodiment, the fixing assembly 33 includes a pressing block 331 and a pressing spring 332, one end of the pressing spring 332 is fixed on the pressing block 331, and the other end is fixed to the middle of the sleeve 312. The combination of the pressing block 331 and the pressing spring 332 can provide continuous and stable pressure for the thermocouple, ensuring that the thermocouple is firmly fixed in the sleeve 312, so that the thermocouple will not be easily loosened or shifted if vibration, shaking or other external force interference occurs during the operation of the equipment, thereby ensuring the accuracy and stability of temperature measurement; at the same time, different specifications of thermocouples can be easily replaced to reduce costs. When installing the thermocouple, it is only necessary to insert the thermocouple into the sleeve 312, and the pressing block 331 will automatically press the thermocouple under the action of the pressing spring 332, and the installation process is simple and quick.

[0061] In a preferred embodiment, a guide groove 3311 is provided on one side of the pressing block 331 facing the sleeve 312, and the end of the sleeve 312 is inserted into the guide groove 3311. The guide groove 3311 on the pressing block 331 provides a clear positioning position for the end of the sleeve 312. When installing, the end of the sleeve 312 is inserted into the guide groove 3311, which can ensure that the relative position of the pressing block 331 and the sleeve 312 is accurate, thereby ensuring that the compression spring 332 can apply pressure in the correct direction, so that the fixation of the thermocouple in the sleeve 312 is more stable and reliable; after the end of the sleeve 312 is inserted into the guide groove 3311, during the operation of the equipment, relative displacement or shaking between the pressing block 331 and the sleeve 312 can be effectively prevented, reducing the temperature measurement error caused by loose fixation, and the cooperation of the guide groove 3311 and the sleeve 312 can resist external force interference from different directions, ensuring that the thermocouple is always kept in the correct position, and improving the accuracy of temperature measurement.

[0062] In a preferred embodiment, at least one pressing member 333 hole 3312 is provided on the pressing block 331, and a pressing member 333 is inserted into the pressing member 333 hole 3312; the pressing member 333 hole 3312 is connected to the installation space 3313, and the pressing member 333 passes through the pressing member 333 hole 3312 and abuts against the thermocouple. On the basis of the pressing block 331 and the pressing spring 332, the pressing member 333 further ensures the stability of the position of the thermocouple in the sleeve 312, and can effectively prevent the thermocouple from loosening or shifting even under strong vibration or external force impact, thereby improving the accuracy and stability of temperature measurement. The setting of multiple fixed points (pressing block 331, pressing spring 332 and pressing member 333) works together to make the fixation of the thermocouple more firm and reliable, and reduce the risk of measurement error caused by the change of the position of the thermocouple. According to the actual application scenario and the characteristics of the thermocouple, a suitable pressing member 333 can be flexibly selected to meet different fixing requirements.

[0063] A method for using a temperature measurement structure based on ceramic-metal welding, comprising the steps of:

[0064] S1, confirm the distribution of reactor core temperature measurement points and determine the size of the heat conducting plate 21;

[0065] S2, attaching a transition layer 22 to the upper and lower surfaces of the heat conducting plate 21;

[0066] S3, confirming the size of the temperature measuring base plate 311 according to the reactor core temperature measuring points;

[0067] S4, drilling holes in the temperature measuring bottom plate 311 according to the positions of the reactor core temperature measuring points;

[0068] S5. Install the sleeve 312 at the corresponding opening position of the temperature measuring base plate 311;

[0069] S6, processing the fixing assembly 33 with the temperature measuring couple according to the size of the sleeve 312;

[0070] The processing of the fixed component 33 with the temperature measuring couple specifically includes the following steps:

[0071] S6.1. Processing guide groove 3311 and hole 3312 of pressing piece 333 on pressing block 331;

[0072] S6.2, fix one end of the compression spring 332 to the side wall of the sleeve 312;

[0073] S6.3, placing the pressing block 331 on the upper part of the sleeve 312, so that the sleeve 312 is clamped in the guide groove 3311;

[0074] S6.4, fix the other end of the compression spring 332 on the compression block 331;

[0075] S6.5. The temperature measuring couple passes through the pressing block 331 and the sleeve 312 until one end abuts against the temperature measuring point;

[0076] S6.6. Insert the pressing piece 333 into the hole 3312 of the pressing piece 333 to fix the temperature measuring thermocouple.

[0077] S7, insert the temperature measuring couple into the sleeve 312 and fix it through the fixing component 33.

[0078] Among them, by confirming the distribution of the temperature measuring points of the reactor core and determining the size of the heat conducting plate 21, the heat conducting plate 21 can better adapt to the temperature measurement requirements of the core, and the heat conducting plate 21 can effectively transfer the heat of the core to the temperature measuring point to ensure the accuracy of the temperature measurement; the temperature measuring base plate 311 is opened and the sleeve 312 is installed, and the fixing component 33 is processed according to the size of the sleeve 312, so that the temperature measuring couple can be accurately installed at the temperature measuring point position, and the close contact between the temperature measuring couple and the temperature measuring base plate 311 ensures the accuracy of temperature measurement. This method of use has clear steps, from confirming the distribution of temperature measuring points to installing the temperature measuring couple, the operator can install it in an orderly manner according to the steps, which can improve the installation efficiency.

[0079] At the same time, it can be processed and installed according to different component sizes to ensure the matching degree between the various components. For example, when faced with complex core structures or special temperature measurement requirements, they can be met by adjusting parameters such as the size of the heat conducting plate 21 and the position of the opening of the temperature measuring base plate 311. The processing of the fixed component 33 can be adjusted according to the size of the sleeve 312 to adapt to different specifications of temperature measuring couples and sleeves 312, so that it is suitable for various reactor types and working environments. A guide groove 3311 is processed on the pressing block 331 so that the sleeve 312 can be accurately clamped in the guide groove 3311, ensuring the accuracy of the relative position between the pressing block 331 and the sleeve 312. When the sleeve 312 is clamped in the guide groove 3311, the pressing block 331 can always act on the temperature measuring couple in the correct direction when applying pressure, avoiding unstable fixation or inaccurate temperature measurement due to position deviation; the hole 3312 of the clamping piece 333 provides an accurate installation position for the clamping piece 333, and the clamping piece 333 directly acts on the temperature measuring couple through the hole 3312 of the clamping piece 333, thereby enhancing the fixing effect on the temperature measuring couple.

[0080] In an optional embodiment, when in use, the tail of the thermocouple is pressed against the side of the thermocouple hole on the pressing block 331 by two clamping screws to ensure that there is no relative sliding between the thermocouple and the pressing block 331 in the clamped state, which facilitates the disassembly and assembly of the thermocouple in the uncompressed state; the lower end of the clamping spring 332 is fixed to the middle of the thermocouple sleeve 312, and the upper end is fixed to the bottom surface of the pressing block 331, providing a pre-tensioning force between the thermocouple sleeve 312 and the pressing block 331 to ensure that the end of the thermocouple It has good contact with the ceramic substrate with the transition layer 22; the end of the temperature measuring couple is in direct contact with the heat conducting plate 21 with the transition layer 22. Since the heat conducting plate 21 and the transition layer 22 have high thermal conductivity and small thickness, the temperature response is rapid and the temperature rise can be identified in time; the upper end of the sleeve 312 is inserted into the guide groove 3311 of the pressing block 331 to ensure that under the pre-tensioning force of the clamping spring 332, the pressing block 331 only slides up and down along the temperature measuring couple sleeve 312 without horizontal movement.

[0081] The implementation principle of the embodiment of the present application is: during the reactor core reaction, the heating plate 1 releases a large amount of heat energy through the nuclear reaction, the heat energy of the heating plate 1 is conducted through the heat-conducting component 2, and is measured by the temperature measuring component 3; during the temperature measurement process, the insulating material on the heat-conducting component 2 can enable the heat-conducting component 2 to meet the high thermal conductivity while avoiding the situation of being electrified during the temperature measurement process, the heat is transferred by the heat-conducting component 2, one end of the measuring part 32 in the temperature measuring component 3 abuts against the heat-conducting component 2, and the temperature of the reactor is measured by measuring the temperature of the heat-conducting component 2.

[0082] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A temperature measurement structure based on ceramic-metal welding, characterized in that: include: A heating plate (1) is arranged in close contact with the reactor core and is used to conduct the reaction temperature of the reactor core; A heat conducting component (2) is arranged on a side of the heating plate (1) away from the reactor core, and the temperature of the heating plate (1) is conducted through the heat conducting component (2); A temperature measuring component (3) comprises a mounting portion (31) and a measuring portion (32), wherein the measuring portion (32) is inserted into the mounting portion (31), and one end of the measuring portion (32) abuts against the heat conducting component (2); The heat-conducting component (2) is insulated from the heating plate (1) and the temperature measuring component (3).

2. The temperature measurement structure based on ceramic-metal welding according to claim 1 is characterized in that: The heat-conducting component (2) comprises a heat-conducting plate (21) and transition layers (22) arranged on both sides of the heat-conducting plate (21); the transition layer (22) located on one side of the heat-conducting plate (21) is in contact with the heating plate (1); and the heating plate (1) is insulated from the transition layer (22).

3. The temperature measurement structure based on ceramic-metal welding according to claim 2 is characterized in that: The outer edge size of the heat conducting plate (21) is larger than the size of the transition layer (22); the heat conducting plate (21) is a heat conducting insulating plate; the transition layer (22) is a metal plate; and the transition layers (22) on both sides of the heat conducting plate (21) are insulated.

4. The temperature measurement structure based on ceramic-metal welding according to claim 1, characterized in that: The mounting portion (31) comprises a temperature measuring base plate (311) and a sleeve (312) which are fitted and fixed to the heat conducting component (2); the position of the sleeve (312) is arranged according to the temperature measuring point; a temperature measuring hole is provided on the temperature measuring base plate (311), and the temperature measuring hole corresponds to the sleeve (312); The measuring part (32) passes through the sleeve (312) and the temperature measuring hole in sequence until one end of the temperature measuring part abuts against the temperature measuring bottom plate (311).

5. The temperature measurement structure based on ceramic-metal welding according to claim 4 is characterized in that: The measuring part (32) is a temperature measuring couple, and a plurality of the sleeves (312) are provided. A temperature measuring couple is inserted into each sleeve (312). The temperature measuring couple is fixed to the sleeve (312) via a fixing component (33), and an installation space (3313) is provided on the fixing component (33) for the temperature measuring couple to pass through.

6. The temperature measurement structure based on ceramic-metal welding according to claim 5, characterized in that: The fixing assembly (33) comprises a pressing block (331) and a pressing spring (332), one end of the pressing spring (332) is fixed on the pressing block (331), and the other end is fixed to the middle part of the sleeve (312).

7. The temperature measurement structure based on ceramic-metal welding according to claim 6, characterized in that: A guide groove (3311) is formed on a side of the pressing block (331) facing the sleeve (312); The end of the sleeve (312) is inserted into the guide groove (3311).

8. The temperature measurement structure based on ceramic-metal welding according to claim 6, characterized in that: At least one pressing piece hole (3312) is provided on the pressing block (331), and a pressing piece (333) is inserted into the pressing piece hole (3312); The clamping member hole (3312) is in communication with the installation space (3313), and the clamping member (333) passes through the clamping member hole (3312) and abuts against the temperature measuring couple.

9. A method for using the temperature measurement structure of ceramic-metal welding according to claims 1-8, characterized in that: Includes steps: Confirming the distribution of reactor core temperature measurement points and determining the size of the heat conducting plate (21); A transition layer (22) is attached to the upper and lower surfaces of the heat conducting plate (21); Confirming the size of the temperature measuring base plate (311) according to the reactor core temperature measuring points; Opening holes in the temperature measuring bottom plate (311) according to the positions of the reactor core temperature measuring points; A sleeve (312) is installed at a corresponding position of the opening of the temperature measuring base plate (311); Processing a fixing assembly (33) with a temperature measuring couple according to the size of the sleeve (312); The temperature measuring couple is inserted into the sleeve (312) and fixed by the fixing assembly (33).

10. The method for using the temperature measurement structure based on ceramic-metal welding according to claim 9, characterized in that: The processing of the fixed component (33) with the temperature measuring couple comprises the following steps: Processing a guide groove (3311) and a pressing piece hole (3312) on the pressing block (331); Fixing one end of the compression spring (332) on the side wall of the sleeve (312); Placing the pressing block (331) on the upper part of the sleeve (312) so that the sleeve (312) is clamped in the guide groove (3311); Fixing the other end of the compression spring (332) on the compression block (331); Passing the temperature measuring couple through the pressing block (331) and the sleeve (312) until one end abuts against the temperature measuring point; A pressing piece (333) is inserted into the pressing piece hole (3312) to fix the temperature measuring thermocouple.

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