Nuclear power irradiation-resistant heat-conducting type liquid level interface two-parameter measurement sensor

Abstract

The utility model discloses a nuclear power irradiation-resistant heat-conducting type liquid level interface two-parameter measurement sensor, and belongs to the technical field of sensors. Comprising a heat conduction type switch electronic module assembly, a mounting flange, a liquid level upper limit sensor assembly, an interface position middle sensor assembly, an interface position lower limit sensor assembly, a sensor delay tube and a temperature detection unit sensor. According to the radiation-resistant heat-conducting liquid level / interface two-parameter measuring sensor for nuclear power, provided by the utility model, a medium can be reliably detected in a high-temperature and high-pressure nuclear power environment (the highest temperature is 458 DEG C). By optimizing the circuit design, the adaptability to the liquid viscosity is improved, the problem of sensor surface accumulation possibly caused by the liquid viscosity is avoided, and therefore the heat conduction effect and performance of the sensor are guaranteed. The sensor can adapt to different liquid media by adjusting the potential, the problem that the sensor needs to be adjusted or replaced is solved, and the flexibility of the sensor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a radiation-resistant thermal conductivity type liquid level interface dual-parameter measurement sensor for nuclear power. Background Art

[0002] As a common liquid level detection technology, thermal conductivity liquid level switch has achieved remarkable results in many application scenarios, but it has a series of problems in high temperature and high pressure, liquid viscosity and multi-media adaptability, which to some extent limit its application scope and performance.

[0003] First of all, the applicability of thermal conductivity level switches in high temperature and high pressure environments cannot be ignored. In industrial production processes, liquid media may be in high temperature and high pressure states, and traditional thermal conductivity level switches may encounter challenges in stability and tolerance under such extreme conditions. For example, in high temperature environments, the material of the sensor may change, resulting in performance degradation or failure.

[0004] Secondly, the viscosity of the liquid has a significant impact on the performance of the thermal conductivity level switch. The viscosity of the liquid may cause accumulation on the sensor surface, forming dirt or attachments, affecting the thermal conductivity of the sensor and thus reducing its performance.

[0005] Multi-media adaptability is another aspect that needs attention. Traditional thermal conductivity level switches usually need to adjust or replace sensors to adapt to different liquid media, resulting in certain inflexibility and increased costs.

[0006] Finally, traditional thermal conductivity level switches are usually single-point level switches that cannot detect both liquid level and interface at the same time, which limits their functionality in some application scenarios. Utility Model Content

[0007] In order to solve the above technical problems, the purpose of the utility model is to provide a radiation-resistant thermal conductivity liquid level interface dual-parameter measurement sensor for nuclear power, which can reliably detect the medium under high temperature and high pressure conditions, improve the adaptability to liquid viscosity by optimizing the circuit, and can be used for interface detection of resin and water. At the same time, it can adapt to different liquid media by adjusting the potential, thus overcoming the problem of needing to replace the sensor.

[0008] The technical problem to be solved by the utility model is achieved by adopting the following technical solutions:

[0009] A radiation-resistant thermal conductivity liquid level and interface dual-parameter measurement sensor for nuclear power, comprising a thermal conductivity switch electronic module assembly, a mounting flange, a liquid level upper limit sensor assembly, an interface intermediate sensor assembly, an interface lower limit sensor assembly, a sensor delay tube, and a detection temperature unit sensor;

[0010] The thermal conductivity switch electronic module assembly is used to process the signals of three groups of liquid level / interface switch sensors and output DPDT switch signals according to the signal changes of the sensors;

[0011] The mounting flange is provided with mounting threads, and one end is screwed and connected to the thermal switch electronic module assembly via the mounting threads;

[0012] The other end of the mounting flange is connected to the sensor delay tube;

[0013] The sensor delay tube is provided with a liquid level upper limit sensor assembly, a boundary position middle sensor assembly, and a boundary position lower limit sensor assembly in sequence from top to bottom;

[0014] The liquid level upper limit sensor assembly, the interface intermediate sensor assembly, the interface lower limit sensor assembly and the detection temperature unit sensor are electrically connected to the thermal conductivity switch electronic module assembly respectively.

[0015] As a preferred example, the sensor further comprises a sensor protective tube, the mounting flange is welded to the sensor protective tube, and the mounting flange is screwed to the sensor delay tube via a mounting thread.

[0016] As a preferred example, the liquid level upper limit sensor assembly, the interface intermediate sensor assembly, and the interface lower limit sensor assembly are respectively welded and connected to the sensor delay tube, and are respectively electrically connected to the thermal conductivity switch electronic module assembly.

[0017] As a preferred example, the sensor further comprises a detection sensor protection shell and a temperature sensor base, the detection sensor protection shell and the temperature sensor base are welded together, and the temperature sensor base is filled with high temperature resistant sealant.

[0018] As a preferred example, the sensor further includes a sensor protective tube, the temperature sensor base is welded to the sensor protective tube, the mounting flange is welded to the sensor protective tube and is screwed to the thermal conductivity switch electronic module assembly via mounting threads.

[0019] As a preferred example, the sensor also includes an auxiliary temperature unit sensor and an auxiliary sensor protective shell. The auxiliary temperature unit sensor is sealed in the auxiliary sensor protective shell by a radiation-resistant and high-temperature resistant sealant, and the auxiliary sensor protective shell is welded to the temperature sensor base.

[0020] As a preferred example, the detection temperature unit sensor and the auxiliary temperature unit sensor are respectively connected to the thermal conductivity switch electronic module assembly through high-temperature welding wires.

[0021] Compared with the prior art, the beneficial effects brought by the utility model are as follows:

[0022] The utility model provides a radiation-resistant thermal conductivity liquid level / interface dual-parameter measurement sensor for nuclear power, which is intended to solve a series of problems existing in existing thermal conductivity liquid level switches on the market. First, the sensor can reliably detect the medium in a high-temperature and high-pressure (up to 458°C) nuclear power environment. Secondly, by optimizing the circuit design, the adaptability to liquid viscosity is improved, avoiding the problem of sensor surface accumulation caused by liquid viscosity, thereby ensuring the thermal conductivity and performance of the sensor. In addition, the sensor also has multi-media adaptability, and can adapt to different liquid media by adjusting the electric potential, eliminating the problem of the need to adjust or replace the sensor, and increasing the flexibility of the sensor. Most importantly, the sensor can not only detect the liquid level, but also detect the interface at the same time, overcoming the limitation of conventional thermal conductivity liquid level switches that can only detect the liquid level. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the general assembly diagram of the sensor in the embodiment of the utility model;

[0024] Figure 2 It is a cross-sectional view of a single-point sensor in an embodiment of the present utility model.

[0025] In the figure:

[0026] 1. Thermal conductivity switch electronic module assembly;

[0027] 2. Install the flange;

[0028] 3. Liquid level upper limit sensor assembly;

[0029] 4. Interface intermediate sensor assembly;

[0030] 5. Interface lower limit sensor assembly;

[0031] 6. Sensor delay tube;

[0032] 7. Detection sensor protective shell;

[0033] 8. Detection temperature unit sensor;

[0034] 9. Temperature sensor base;

[0035] 10. Sensor protection tube;

[0036] 11. Auxiliary temperature unit sensor;

[0037] 12. Auxiliary sensor protective shell. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0040] refer to Figure 1 and Figure 2 The embodiment of the utility model provides a radiation-resistant thermal conductivity liquid level interface dual-parameter measurement sensor for nuclear power, which specifically includes the following key components:

[0041] Thermal conductivity switch electronic module assembly 1:

[0042] The thermal conductivity switch electronic module assembly 1 is the core component of this patent, which is responsible for processing the signals from the three groups of liquid level / interval switch sensors and outputting the DPDT (double-pole double-throw switch) switch signals according to the changes in the sensor signals. The detailed implementation of this assembly is further described below:

[0043] Signal processing: This module is designed to receive signals from the liquid level / interface level sensor components (3, 4, 5). Each sensor component is electrically connected to the thermal conductivity switch electronic module component 1 to achieve effective signal transmission.

[0044] DPDT output: According to the received signal, the thermal conductivity switch electronic module assembly 1 can generate a DPDT switch signal. The DPDT switch has a common contact, a normally open contact and a normally closed contact. This design allows the circuit to be switched under different liquid level or interface state, realizing accurate control of liquid level and interface position.

[0045] Sensitivity adjustment: In order to adapt to different working conditions and changes in liquid media, the thermal conductivity switch electronic module assembly 1 may include a sensitivity adjustment device. By adjusting the sensitivity, the system can maintain stable performance in different environments and ensure accurate detection of liquid level and interface position.

[0046] Interface design: In order to integrate with other systems or monitoring equipment, the thermal conductivity switch electronic module assembly 1 may provide a standard communication interface, such as a digital signal output, an analog signal output or a communication bus interface.

[0047] The thermal conductivity switch electronic module assembly 1 is a core component, and its composition structure is as follows:

[0048] Main control chip: The thermal conductivity switch electronic module assembly 1 contains a main control chip, which is the core of the entire module. The main control chip is responsible for processing sensor signals, controlling switch outputs, and contains built-in signal processing and amplification circuits to ensure sensitivity and reliability under different working conditions.

[0049] Sensor interface: To connect the three sets of liquid level / interface level sensor components, the module is equipped with corresponding sensor interfaces. These interfaces can use high temperature and high pressure cables or connectors to ensure stable connection in extreme environments.

[0050] Signal processing circuits: Signal processing circuits are arranged around the main control chip to filter, amplify and process the signals sent by the sensor components. These circuits help improve the system's sensitivity to changes in liquid level and interface level, and respond promptly to changes in different media.

[0051] Power management module: To ensure the reliability and stability of the system, the thermal conductivity switch electronic module assembly 1 may also include a power management module for managing functions such as power supply, voltage stabilization and current protection.

[0052] Three DPDT switch control groups: The module integrates three DPDT switch control circuits, which can switch the switch status according to the instructions of the main control chip. The DPDT switch is used to control the detection signals of the liquid level and interface position to achieve liquid level control of the nuclear power system.

[0053] Mounting flange 2:

[0054] The mounting flange 2 is a key component in the sensor system of this technical solution. It is designed to provide stable support and connection to ensure the accuracy and reliability of the sensor assembly. The following is a detailed structural description of the mounting flange 2:

[0055] Flange body: The main body of the mounting flange 2 is a disc-shaped metal component, usually made of stainless steel or other high temperature and high pressure corrosion-resistant materials.

[0056] Welding interface: One side of the mounting flange 2 is designed with an interface for welding with the sensor protective tube 10. By welding, the flange is firmly connected to the sensor protective tube 10 to ensure the stability and reliability of the sensor.

[0057] Mounting thread: The other side of the mounting flange 2 is designed with mounting threads, which is the key part for connecting with the sensor assembly. The thread design is intended to provide a simple and reliable connection method, making the installation and removal process more convenient.

[0058] Tightening structure: When the mounting flange 2 is connected to the sensor assembly through the mounting thread, a tightening structure is designed. It can be a threaded structure or other tightening devices to ensure that the connection is tight and prevent loosening during operation.

[0059] Corrosion-resistant treatment: Since corrosive media may exist in the nuclear power environment, the mounting flange 2 may undergo special corrosion-resistant treatment to extend its service life and stability.

[0060] Liquid level upper limit sensor component 3, interface intermediate sensor component 4, interface lower limit sensor component 5:

[0061] The upper limit liquid level sensor assembly 3, the intermediate level sensor assembly 4, and the lower limit level sensor assembly 5 are important components of the liquid level / interval level dual parameter measurement sensor. They are used to measure the upper limit liquid level, the intermediate level and the lower limit liquid level of the medium respectively, and adjust the position through the sensor delay tube 6. The following is the detailed structure and working principle of these sensor assemblies:

[0062] Liquid level upper limit sensor assembly 3 structure and working principle:

[0063] Measuring principle: The liquid level upper limit sensor assembly 3 adopts the thermal conductivity measurement principle. When the medium liquid level reaches the upper limit, the sensor assembly senses the liquid and measures the liquid level height through the change of thermal conductivity.

[0064] Component structure: including a thermistor, a heating element and an insulating layer. The thermistor and the heating element are electrically connected to the thermal conductivity switch electronic module component 1.

[0065] Adjustment of the sensor delay tube 6: By adjusting the length of the sensor delay tube 6, the installation position of the liquid level upper limit sensor assembly 3 can be determined to ensure that it accurately measures the upper limit liquid level.

[0066] Structure and working principle of interface intermediate sensor assembly 4:

[0067] Measuring principle: The interface position sensor assembly 4 also adopts the thermal conductivity measurement principle. Its function is to measure the interface position between two phases of the medium (such as the interface between liquid and gas).

[0068] Component structure: thermistor, heating element and insulation layer. Electrically connected to the thermal conductivity switch electronic module component 1.

[0069] Adjustment of the sensor delay tube 6: By adjusting the length of the sensor delay tube 6, the position of the middle sensor assembly is determined so as to accurately measure the interface position of the medium.

[0070] Structure and working principle of the lower limit sensor assembly 5:

[0071] Measuring principle: The lower limit sensor assembly 5 still adopts the thermal conductivity measurement principle to detect the lower limit liquid level of the medium.

[0072] Component structure: also includes a thermistor, a heating element and an insulating layer, and is electrically connected to the thermal conductivity switch electronic module component 1.

[0073] Adjustment of sensor delay tube 6: By adjusting the length of the sensor delay tube 6, the position of the lower limit sensor assembly is determined to ensure accurate measurement of the lower limit liquid level.

[0074] Overall working principle:

[0075] Sensor component selection: According to the user's settings, select the liquid level upper limit sensor component 3, the boundary level middle sensor component 4 and the boundary level lower limit sensor component 5.

[0076] Adjustment of the sensor delay tube 6: By adjusting the length of the sensor delay tube 6, the installation positions of the three sensor components are determined respectively to adapt to different liquid level / interface position requirements.

[0077] Thermal conductivity measurement: When the medium level reaches the measuring area of ​​the sensor component, the thermistor in the component measures the presence of the liquid and measures the liquid level through changes in thermal conductivity.

[0078] Electrical connection: The three sensor components are electrically connected to the thermal conductivity switch electronic module component 1 to transmit the measured signals to the core electronic module.

[0079] Sensor delay tube 6:

[0080] The sensor delay tube 6 plays a key role in the radiation-resistant thermal conductivity liquid level / interface dual parameter measurement sensor for nuclear power. Its main function is to adjust the position of the liquid level sensor to ensure accurate measurement of the liquid level and interface position. The following is the specific structure and working principle of the sensor delay tube 6:

[0081] Structure and working principle:

[0082] Pipe material: The sensor delay tube 6 is usually made of high temperature and radiation resistant materials to adapt to the high temperature and high radiation characteristics of the nuclear power environment. Common materials include stainless steel, alloys, etc.

[0083] Pipeline length: The length of the sensor delay tube 6 is adjustable, and the installation position of the liquid level sensor can be flexibly determined by adjusting its length. This is crucial for adapting to the liquid level / interface level measurement of different liquid media.

[0084] Electrical connection: The sensor delay tube 6 is equipped with a liquid level upper limit sensor assembly 3, an interface intermediate sensor assembly 4 and an interface lower limit sensor assembly 5. These assemblies are electrically connected to the thermal conductivity switch electronic module assembly 1 to achieve the transmission of the measurement signal.

[0085] Protection function: The sensor delay tube 6 has a certain protection function on the outside, which can resist the adverse effects of the environment and ensure the normal operation of the internal sensor components. In addition, in the nuclear power environment, the sensor delay tube 6 may be affected by factors such as radiation and high temperature, so the design of the sensor delay tube 6 needs to have a certain tolerance and stability.

[0086] Workflow:

[0087] User setting: According to the requirements of liquid level / interval level, the user selects and sets the liquid level upper limit sensor component 3, the intermediate interface sensor component 4 and the lower interface sensor component 5.

[0088] Adjust the length: The user can ensure that the three sensor components are located at the positions of the liquid level / interface level to be measured by adjusting the length of the sensor delay tube 6. The length adjustment is a flexible process and can be fine-tuned according to specific needs.

[0089] Installation and connection: The sensor delay tube 6 is welded to the thermal conductivity switch electronic module assembly 1 through the mounting flange 2, and is electrically connected to the liquid level upper limit sensor assembly 3, the boundary position intermediate sensor assembly 4 and the boundary position lower limit sensor assembly 5.

[0090] Signal transmission: When the liquid level / interval of the liquid medium reaches the measuring range of the sensor assembly, the sensor assembly transmits the measured signal to the thermal conductivity switch electronic module assembly 1 through the sensor delay tube 6. These signals are then processed and finally output as DPDT switch signals.

[0091] Detection sensor protective shell 7:

[0092] The detection sensor protection shell 7 plays an important protective role in the radiation-resistant thermal conductivity liquid level / interface dual parameter measurement sensor for nuclear power. It is designed to withstand high radiation and high temperature in the nuclear power environment and protect the internal detection temperature unit sensor 8 from external adverse factors.

[0093] Structure and function:

[0094] Material selection: The detection sensor protective shell 7 is made of special materials that are resistant to radiation and high temperature, and can maintain stability in extreme environments.

[0095] Glue sealing process: The detection temperature unit sensor 8 is sealed in the sensor protection shell by radiation-resistant and high-temperature-resistant glue. The glue sealing process is intended to protect the detection temperature unit sensor 8 from radiation, high temperature and other external environmental interference.

[0096] Connection method: The detection sensor protection shell 7 and the temperature sensor base 9 are connected by welding to ensure the sealing and structural firmness. At the same time, the temperature sensor base 9 is filled with high temperature resistant sealant to further ensure the sealing of the connection.

[0097] Detection temperature unit sensor 8:

[0098] The detection temperature unit sensor 8 is one of the core components of the radiation-resistant thermal conductivity liquid level / interface dual parameter measurement sensor for nuclear power. Its function is to detect the precise position of the liquid level / interface according to the temperature difference generated by different heat dissipation efficiencies.

[0099] Glue seal protection: The detection temperature unit sensor 8 is sealed in the detection sensor protection shell 7 by radiation-resistant and high-temperature-resistant glue. This design effectively isolates the influence of the external environment on the sensor and improves the durability and stability of the sensor.

[0100] Temperature heat dissipation: By contacting with the liquid, the temperature detection unit sensor 8 can sense the temperature of the liquid. Since the heat dissipation efficiency of the liquid is related to the height of the liquid level, the resulting temperature difference can accurately reflect the position of the liquid level / interval.

[0101] High-precision measurement: Since the temperature change of the liquid has a relatively small impact on the sensor, the detection temperature unit sensor 8 can provide high-precision liquid level / interface level measurement to meet the measurement accuracy requirements of the nuclear power system.

[0102] Temperature sensor base 9:

[0103] The temperature sensor base 9 plays a role in supporting and protecting the temperature sensor in the liquid level / interface level measurement system, and is simultaneously sealed by high temperature resistant sealant to ensure the sealing of the system.

[0104] Supporting function: The temperature sensor base 9 is connected to the sensor protective tube 10 by welding, which provides a firm support for the detection temperature unit sensor 8 and ensures its stable installation in the liquid.

[0105] Sealing protection: The temperature sensor base 9 is filled with high temperature resistant sealant. Through the sealing process of the sealant, the external environment can be effectively isolated to prevent high temperature, radiation and other factors from having adverse effects on the system.

[0106] Electrical connection: The temperature sensor is connected to the thermal switch electronic module assembly 1 by high-temperature welding of the lead wires in the temperature sensor base 9 to ensure stable and reliable transmission of the measurement signal.

[0107] Sensor protection tube 10:

[0108] The sensor protection tube 10 is a protective shell for liquid level / interface level control in the system. It is welded to the temperature sensor base 9 and sealed with high temperature resistant sealant to provide a safe working environment for the temperature sensor.

[0109] Structure and function:

[0110] Connection with the base: The sensor protective tube 10 is connected to the temperature sensor base 9 by welding to form an integral structure. This connection method ensures that the protective tube is tightly combined with other components of the system.

[0111] Sealing protection: The outside of the sensor protection tube 10 is potted with high temperature resistant sealant, which provides effective sealing protection for the internal temperature sensor. This is of great significance for preventing external liquids, radiation and other factors from interfering with the temperature sensor.

[0112] Auxiliary temperature unit sensor 11:

[0113] The auxiliary temperature unit sensor 11 plays a role in comparing temperature changes in the system, and provides additional temperature information by being sealed in the auxiliary sensor protective shell 12 with radiation-resistant and high-temperature-resistant glue.

[0114] Glue sealing protection: The auxiliary temperature unit sensor 11 is sealed in the auxiliary sensor protection shell 12 by radiation-resistant and high-temperature-resistant glue to ensure that it is not affected by the external environment.

[0115] Providing comparative information: By comparing the data from the primary temperature sensor and the auxiliary temperature sensor, the system can more accurately determine the change in the liquid level / interface position. This provides redundant information for the system and improves the reliability of the entire liquid level / interface control system.

[0116] Auxiliary sensor protection shell 12:

[0117] The auxiliary sensor protection shell 12 is a protective shell of the auxiliary temperature unit sensor 11 , and is sealed with high temperature resistant sealant to ensure the stability and durability of the system.

[0118] High temperature resistant material: The auxiliary sensor protection shell 12 is usually made of high temperature resistant and radiation resistant materials to meet the special requirements of the nuclear power environment.

[0119] Connection with the system: The auxiliary sensor protection shell 12 is connected to the temperature sensor base 9 by welding to form an integral structure. This connection method ensures the stable operation of the auxiliary temperature unit sensor 11.

[0120] The utility model provides a radiation-resistant thermal conductivity liquid level / interface dual-parameter measurement sensor for nuclear power, which aims to solve a series of problems existing in the existing thermal conductivity liquid level switches on the market. First, the sensor can reliably detect the medium in a nuclear power environment with high temperature and high pressure (up to 458°C), and the stability and tolerance under harsh conditions are ensured by adopting a high temperature resistant sealant. Secondly, by optimizing the circuit design, the adaptability to liquid viscosity is improved, and the problem of accumulation on the sensor surface that may be caused by liquid viscosity is avoided, thereby ensuring the thermal conductivity and performance of the sensor. In addition, the sensor also has multi-media adaptability, and can adapt to different liquid media by adjusting the potential, eliminating the problem of the sensor needing to be adjusted or replaced, and increasing the flexibility of the sensor. Most importantly, the sensor can not only detect the liquid level, but also detect the interface at the same time, overcoming the limitation that conventional thermal conductivity liquid level switches can only detect the liquid level alone.

[0121] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0122] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two or three, unless otherwise clearly and specifically defined.

[0123] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A radiation-resistant thermal conductivity liquid level interface dual-parameter measurement sensor for nuclear power, characterized in that: It comprises a thermal conductivity switch electronic module assembly (1), a mounting flange (2), an upper limit liquid level sensor assembly (3), an intermediate level sensor assembly (4), a lower limit level sensor assembly (5), a sensor delay tube (6) and a detection temperature unit sensor (8); The thermal conductivity switch electronic module assembly (1) is used to process the signals of three groups of liquid level / interval switch sensors and output DPDT switch signals according to the changes in the sensor signals; The mounting flange (2) is provided with mounting threads, and one end is screwed and connected to the thermal conductivity switch electronic module assembly (1) via the mounting threads; The other end of the mounting flange (2) is connected to the sensor delay tube (6); The sensor delay tube (6) is provided with a liquid level upper limit sensor assembly (3), an interface intermediate sensor assembly (4), and an interface lower limit sensor assembly (5) in sequence from top to bottom; The liquid level upper limit sensor assembly (3), the boundary level intermediate sensor assembly (4), the boundary level lower limit sensor assembly (5) and the detection temperature unit sensor (8) are respectively electrically connected to the thermal conductivity switch electronic module assembly (1).

2. A radiation-resistant thermal conductivity liquid level interface dual-parameter measurement sensor for nuclear power according to claim 1, characterized in that: The sensor further comprises a sensor protective tube (10), the mounting flange (2) is welded to the sensor protective tube (10), and the mounting flange (2) is screwed to the sensor delay tube (6) via a mounting thread.

3. The radiation-resistant thermal conductivity liquid level interface dual-parameter measurement sensor for nuclear power according to claim 1, characterized in that: The liquid level upper limit sensor assembly (3), the boundary position intermediate sensor assembly (4), and the boundary position lower limit sensor assembly (5) are respectively welded and connected to the sensor delay tube (6), and are respectively electrically connected to the thermal conductivity switch electronic module assembly (1).

4. A radiation-resistant thermal conductivity liquid level interface dual-parameter measurement sensor for nuclear power according to any one of claims 1 to 3, characterized in that: The sensor further comprises a detection sensor protection shell (7) and a temperature sensor base (9); the detection sensor protection shell (7) and the temperature sensor base (9) are welded together, and the temperature sensor base (9) is filled with high temperature resistant sealant.

5. A radiation-resistant thermal conductivity liquid level interface dual-parameter measurement sensor for nuclear power according to claim 4, characterized in that: The sensor further comprises a sensor protective tube (10), the temperature sensor base (9) is welded to the sensor protective tube (10), the mounting flange (2) is welded to the sensor protective tube (10) and is screwed together with the thermal conductivity switch electronic module assembly (1) via mounting threads.

6. A radiation-resistant thermal conductivity liquid level interface dual-parameter measurement sensor for nuclear power according to claim 4, characterized in that: The sensor further comprises an auxiliary temperature unit sensor (11) and an auxiliary sensor protective shell (12); the auxiliary temperature unit sensor (11) is sealed in the auxiliary sensor protective shell (12) by means of a radiation-resistant and high-temperature-resistant sealant; and the auxiliary sensor protective shell (12) is welded to the temperature sensor base (9).

7. A radiation-resistant thermal conductivity liquid level interface dual-parameter measurement sensor for nuclear power according to claim 6, characterized in that: The detection temperature unit sensor (8) and the auxiliary temperature unit sensor (11) are respectively connected to the thermal conductivity switch electronic module assembly (1) via high-temperature welding wires.

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