Sensor packaging structure and sensor

Abstract

The invention relates to the technical field of equipment protection, and provides a sensor packaging structure and a sensor.The sensor packaging structure comprises an inner shell, and the inner shell is used for being arranged outside a sensor body; the outer shell is arranged outside the inner shell in a sleeving mode, a heat insulation cavity is formed between the inner shell and the outer shell, a plurality of supporting columns are arranged in the heat insulation cavity at intervals, and the heat insulation cavity is filled with inert gas. The heat resistance and the heat insulation stability of the sensor probe are greatly improved, the sensor probe can continuously play a protection role under the working conditions of extreme high temperature and strong heat radiation in the initial casting stage of continuous casting of a super-large-section round billet, and the temperature inside the probe is prevented from rising suddenly; the protection effect of the shell is combined with the stability of the whole structure, so that the accuracy of liquid level measurement data is guaranteed, false alarm, false stop or control failure of a system is avoided, and finally, the service life and the measurement reliability of the sensor probe in an ultra-large section round billet continuous casting extreme metallurgical environment are improved; and reliable guarantee is provided for stable operation of the continuous casting process and optimization of the casting blank forming quality.

Description

Technical Field

[0001] This invention relates to the field of equipment protection technology, and more specifically, to a sensor packaging structure and a sensor. Background Technology

[0002] In the steel manufacturing industry, the continuous casting process for ultra-large cross-section round billets is rapidly developing towards larger scale, higher quality, and greater intelligence. Precise control and real-time monitoring of molten steel level are crucial for ensuring stable operation of the continuous casting process, preventing steel leakage accidents, optimizing the flow state and thermal distribution of molten steel within the crystallizer, and improving the quality of billet formation. This has a vital impact on the safety and finished product qualification rate of the entire continuous casting production. Electromagnetic induction level sensors, due to their outstanding advantages such as non-contact operation, fast response speed, and adaptability to high-temperature conditions, have become the mainstream equipment for monitoring molten steel level in the continuous casting process of ultra-large cross-section round billets.

[0003] However, in practical applications of ultra-large cross-section round billet continuous casting, this type of sensor probe still faces many technical problems: First, ultra-large cross-section round billet continuous casting is characterized by a wide exposed surface and high thermal radiation intensity. Especially in the initial stage of casting in the crystallizer, the sensor probe will be directly exposed to a strong radiative heat flow environment of over 1500℃, which can easily cause thermal fatigue, softening, or even structural deformation of the sensor shell and internal structural materials, thereby affecting the service life of the probe and the stability of the liquid level monitoring signal. Second, the ultra-large cross-section round billet has a small height-to-diameter ratio and a large inertia of molten steel flow. Molten steel ejected from the submerged entry nozzle is prone to strong backlash disturbances and splashing phenomena, which are particularly obvious in the initial casting stage. The splashed molten steel adheres to the probe surface and easily forms metal. Slag shells can clog the sensing surface or interfere with the magnetic field signal, causing distortion of liquid level measurement data. In severe cases, this can lead to false alarms, false shutdowns, or even system detachment. Thirdly, in the extreme condition of no protective slag during the initial pouring stage, the probe is directly subjected to radiation from molten steel at temperatures above 1500°C, impacts from violently splashing metal droplets, and intense thermal shock. At this time, the outer shell is prone to thermal deformation and bending or impact compression, which can lead to a thermal short-circuit path with a sudden increase in thermal conductivity. This causes heat to quickly penetrate the insulation layer along the shortest path, resulting in a sharp rise in the internal temperature of the probe. At the same time, traditional insulation layers do not have self-supporting capabilities and are difficult to maintain geometric stability under long-term high-temperature radiation and thermal shock conditions. Their insulation performance will significantly degrade over service time, making it difficult to form a continuous and stable insulation barrier. Summary of the Invention

[0004] The present invention aims to solve at least one of the above-mentioned technical problems.

[0005] To address the above problems, this invention provides a sensor packaging structure and a sensor.

[0006] In a first aspect, the present invention provides a sensor packaging structure, comprising: Inner shell, which is disposed outside the sensor body; The outer shell is fitted over the inner shell, and a heat insulation cavity is provided between the inner shell and the outer shell. Several support columns are arranged at intervals in the heat insulation cavity, and the heat insulation cavity is filled with inert gas.

[0007] Optionally, the inner wall of the outer casing is provided with a heat-resistant cotton lining.

[0008] Optionally, the sensor packaging structure further includes an ultra-high temperature resistant functional coating applied to the outer surface of the housing.

[0009] Optionally, the support column is made of high-temperature ceramic, silicon carbide composite material or alumina ceramic.

[0010] Optionally, the inner shell is made of a nickel-chromium-iron-molybdenum alloy.

[0011] Optionally, the housing is made of titanium alloy.

[0012] Optionally, the sensor packaging structure further includes nozzles disposed around the sensor body, the outlet direction of the nozzles covering the sensor detection surface area, and the nozzles being used to connect to a compressed air supply system to deliver high-pressure airflow to the sensor detection surface area.

[0013] Optionally, the sensor packaging structure further includes a temperature sensing element disposed between the inner shell and the sensor body or disposed inside the outer shell. The temperature sensing element is communicatively connected to the nozzle and is used to activate the nozzle when the temperature detected by the temperature sensing element undergoes abnormal fluctuations.

[0014] Optionally, the sensor packaging structure further includes a timer connected to the nozzle. The timer is used to send a start or stop signal to the nozzle at a preset period to start or stop the nozzle from operating.

[0015] Secondly, the present invention provides a sensor, including the sensor packaging structure as described above.

[0016] The beneficial effects of the sensor packaging structure of this invention are as follows: the inner shell is located outside the sensor body, directly protecting the sensor body. The special alloy material typically used for the inner shell possesses excellent high-temperature resistance and thermal shock resistance, maintaining structural integrity even under strong radiative heat flux environments. This prevents thermal fatigue, softening, or deformation of the outer shell and internal structure, ensuring the probe's service life and maintaining the stability of the sensor signal, thus solving the problem of insufficient heat resistance in existing probes. The heat insulation cavity between the inner and outer shells is filled with inert gas. Utilizing the extremely low thermal conductivity of the inert gas, combined with the multiple reflections, scattering, and attenuation effects of thermal radiation between the cavity walls, the heat transfer path is extended, significantly reducing heat flux density and effectively blocking external high temperatures from being conducted inwards. Simultaneously, the heat insulation cavity replaces the traditional filled insulation layer, structurally avoiding the drawback of traditional insulation layers easily forming thermal short circuits, preventing rapid heat penetration and a sharp increase in the probe's internal temperature. The spaced support columns within the insulation cavity maintain structural stability under extreme high-temperature environments. This effectively limits the insulation cavity from compression, collapse, or closure when the outer shell deforms due to heat or is impacted by splashing molten steel, ensuring long-term dimensional stability of the insulation cavity. Simultaneously, it disperses thermal shock stress, giving the insulation cavity self-supporting capabilities. This solves the problems of traditional insulation layers lacking self-support, exhibiting poor geometric stability, and experiencing thermal insulation performance degradation over service life. The outer shell, fitted over the inner shell and insulation cavity, directly resists the impact of splashing molten steel and the erosion of slag, reducing the direct impact of external high temperatures and debris on the internal structure. It provides an outer layer of protection for the inner shell and insulation cavity, lowering the probability of damage to these components and indirectly ensuring the overall protective capability of the encapsulated structure.

[0017] This invention, through the coordinated operation of the inner shell, outer shell, heat insulation cavity, and support column, forms a multi-layered, highly stable protection system. On one hand, this structure significantly improves the heat resistance and thermal insulation stability of the sensor probe, enabling it to continuously provide protection under extreme high temperatures and strong heat radiation conditions during the initial stages of continuous casting of ultra-large cross-section round billets, preventing a sudden rise in the probe's internal temperature. On the other hand, the protective function of the outer shell, combined with the overall structural stability, reduces the adhesion of molten steel splashes to the probe surface and their impact on the structure, lowering the probability of metal slag clogging the sensing surface or interfering with the magnetic field signal. This ensures the accuracy of the liquid level measurement data, avoids false alarms, false shutdowns, or system malfunctions, and ultimately achieves a dual improvement in the service life and measurement reliability of the sensor probe in the extreme metallurgical environment of ultra-large cross-section round billet continuous casting, providing a reliable guarantee for the stable operation of the continuous casting process and the optimization of billet forming quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the sensor packaging structure according to an embodiment of the present invention; Figure 2 This is a side view of the sensor packaging structure according to an embodiment of the present invention. Figure 2 .

[0019] Explanation of reference numerals in the attached figures: 1-Sensor body; 2-Crystallizer copper tube; 3-Inner shell; 4-Outer shell; 5-Insulation cavity; 6-Support column; 7-Heat-resistant cotton lining; 8-Nozzle. Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0021] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0022] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0023] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a sensor packaging structure, comprising: Inner shell 3, the inner shell 3 is used to be disposed outside the sensor body 1; The outer shell 4 is fitted over the inner shell 3, and a heat insulation cavity 5 is provided between the inner shell 3 and the outer shell 4. Several support columns 6 are arranged at intervals in the heat insulation cavity 5, and the heat insulation cavity 5 is filled with inert gas.

[0024] Specifically, the shape of the inner shell 3 is adapted to the shape of the sensor body 1, providing the main structural support for the sensor probe and ensuring that it maintains its shape and function under high-temperature radiation and mechanical stress. Furthermore, within the range of room temperature to the maximum operating temperature, the relative permeability μr≈1 must be controlled to prevent any perceptible magnetic field interference. In material selection, the inner shell 3 should be made of a material with oxidation resistance, good high-temperature strength, and excellent thermal shock resistance. Even after the heat insulation cavity 5 and the outer shell 4 are damaged by molten steel, it can still protect the internal probe body structure from interference. The thickness of the inner shell 3 can be set according to different sensor characteristics and the production environment; in this embodiment, it can be set to 2mm. The outer shell 4 is made of high-temperature resistant materials such as titanium alloy or industrial pure titanium. The shape of the outer shell 4 is adapted to the shape of both the sensor body 1 and the inner shell 3, and its size is slightly larger than that of the inner shell 3. This allows it to form a gap with the inner shell 3 when coaxially fitted outside the inner shell 3, thus constituting the heat insulation cavity 5. The height of the heat insulation cavity 5 can be 2-5mm, and the cavity is filled with inert gas; the height of the support column 6 is adapted to the size of the heat insulation cavity 5, and it can be a cylindrical structure with a height of 2-5mm. The material can be a high-temperature resistant and hard material. Each support column 6 is evenly distributed in the heat insulation cavity 5, and its two ends are fixedly connected to the outer wall of the inner shell 3 and the inner wall of the outer shell 4 respectively, without direct contact with the sensor body 1.

[0025] In this embodiment of the invention, the inner shell 3 is disposed outside the sensor body 1, directly protecting the sensor body 1. The inner shell 3 is typically made of a special alloy material with excellent high-temperature resistance and thermal shock resistance, maintaining structural integrity even under strong radiative heat flux environments. This prevents thermal fatigue, softening, or deformation of the outer shell and internal structure, ensuring the probe's service life and maintaining the stability of the sensor signal, thus solving the problem of insufficient heat resistance in existing probes. The heat insulation cavity 5 between the inner shell 3 and the outer shell 4 is filled with inert gas. Utilizing the extremely low thermal conductivity of the inert gas, combined with the multiple reflections, scattering, and attenuation effects of thermal radiation between the cavity walls, the heat transfer path is extended, significantly reducing the heat flux density and effectively blocking the conduction of external high temperatures to the interior. Simultaneously, the heat insulation cavity 5 replaces the traditional filled insulation layer, structurally avoiding the drawback of traditional insulation layers easily forming thermal short circuits, preventing rapid heat penetration and a sharp increase in the probe's internal temperature. The spaced support columns 6 within the heat insulation cavity 5 maintain structural stability under extreme high-temperature environments. This effectively limits the compression, collapse, or closure of the heat insulation cavity 5 when the outer shell 4 deforms due to heat or is impacted by splashing molten steel, ensuring long-term dimensional stability of the heat insulation cavity 5. Simultaneously, it disperses thermal shock stress, giving the heat insulation cavity 5 self-supporting capabilities. This solves the problems of traditional heat insulation layers lacking self-support, exhibiting poor geometric stability, and experiencing thermal insulation performance degradation over service life. The outer shell 4, fitted over the inner shell 3 and the heat insulation cavity 5, directly resists the impact of splashing molten steel and the erosion of slag, reducing the direct impact of external high temperatures and debris on the internal structure. It provides an outer layer of protection for the inner shell 3 and the heat insulation cavity 5, reducing the probability of damage to these components and indirectly ensuring the overall protective capability of the encapsulation structure.

[0026] This invention, through the coordinated operation of the inner shell 3, outer shell 4, heat insulation cavity 5, and support column 6, forms a multi-layered, highly stable protection system. On one hand, this structure significantly improves the heat resistance and thermal insulation stability of the sensor probe, enabling it to continuously provide protection under extreme high temperatures and strong heat radiation conditions during the initial stages of continuous casting of ultra-large cross-section round billets, preventing a sudden rise in probe internal temperature. On the other hand, the protective function of the outer shell 4, combined with the overall structural stability, reduces the adhesion of molten steel splashes to the probe surface and their impact on the structure, lowering the probability of metal slag clogging the sensing surface or interfering with the magnetic field signal. This ensures the accuracy of liquid level measurement data, avoids false alarms, false shutdowns, or system malfunctions, and ultimately achieves a dual improvement in the service life and measurement reliability of the sensor probe under the extreme metallurgical environment of ultra-large cross-section round billet continuous casting, providing a reliable guarantee for the stable operation of the continuous casting process and the optimization of billet forming quality.

[0027] Optionally, the inner wall of the outer casing 4 is provided with a heat-resistant cotton lining 7.

[0028] Specifically, such as Figure 1 and Figure 2As shown, the heat-resistant cotton liner 7 is in the form of a thin sheet, with a thickness of 0.5-1mm. It can be made of heat-resistant cotton materials with low thermal conductivity, such as high-temperature resistant aluminum silicate heat-resistant cotton or ceramic fiber cotton. The heat-resistant cotton liner 7 is adhered and fixed to the inner wall of the outer shell 4, forming a tight layered connection structure with the outer shell 4. The heat-resistant cotton liner 7 can serve as an additional thermal resistance barrier between the outer shell 4 and the insulation cavity 5. Utilizing its own low thermal conductivity, it further weakens the heat transfer from the outer shell 4 to the insulation cavity 5, slowing down the penetration rate of external high temperature into the encapsulation structure. Furthermore, the thin sheet structure of the heat-resistant cotton liner 7 can adapt to the inner wall shape of the outer shell 4, reducing the heat convection transfer channels formed through the gaps without affecting the geometric dimensions of the insulation cavity 5 and the support stability of the support column 6.

[0029] In this embodiment, a heat-resistant cotton liner 7 is provided, which can form a synergistic heat insulation system with the inert gas insulation of the heat insulation cavity 5 and the structural stability protection of the support column 6. This effectively reduces the impact of external high-temperature heat flow on the internal packaging structure, and avoids signal drift or structural failure of the internal sensor body 1 due to a sudden temperature rise. At the same time, its low thermal conductivity can reduce the heat conduction efficiency of the outer shell 4, alleviate the thermal deformation of the outer shell 4 caused by excessive internal and external temperature differences, indirectly ensure the geometric stability of the heat insulation cavity 5, and avoid the formation of thermal short circuit paths in the heat insulation cavity 5 due to deformation and compression of the outer shell 4. Ultimately, this improves the heat insulation continuity and structural reliability of the entire packaging structure under the extreme high-temperature conditions of continuous casting of ultra-large cross-section round billets, and meets the requirements for long-term stable service of the liquid level sensor probe.

[0030] Optionally, the sensor packaging structure further includes an ultra-high temperature resistant functional coating applied to the outer surface of the housing 4.

[0031] Specifically, the ultra-high temperature resistant functional coating is a uniform thin film with a thickness of up to 50 μm, and a boron nitride-based composite coating can be selected. This coating is tightly coated on the outer surface of the outer shell 4, forming a strong layered bonding structure. It directly serves as the outermost protective layer of the sensor packaging structure, without direct connection to the inner shell 3, the heat insulation cavity 5, the support column 6, or other internal structures. The ultra-high temperature resistant functional coating can directly resist the high-temperature erosion, chemical corrosion, and scouring of molten steel and slag during the continuous casting of ultra-large cross-section round billets, providing direct outer protection for the outer shell 4 and preventing structural damage due to high temperature and corrosion. Furthermore, its anti-wetting and easy slag removal properties reduce the adhesion of molten steel splashes and slag to the surface of the outer shell 4, reducing the adhesion and accumulation of metal slag on the outer shell surface.

[0032] In this embodiment, the ultra-high temperature resistant functional coating can form a multi-level synergistic protection system with the heat-resistant cotton lining 7 of the outer shell 4, the inert gas insulation of the heat insulation cavity 5, the structural stability protection of the support column 6, and the core protection of the inner shell. This can effectively reduce the direct heat transfer of external high temperature to the encapsulation structure, alleviate the risk of thermal deformation of the outer shell 4, indirectly ensure the geometric stability of the heat insulation cavity 5, and avoid the formation of thermal short circuit paths in the heat insulation cavity 5 due to deformation and compression of the outer shell 4. At the same time, the coating can reduce the blockage of the sensing surface or interference with the magnetic field signal by the slag shell formed by molten steel splashing. In conjunction with subsequent possible cleaning structures, it can further ensure the accuracy of the liquid level measurement signal.

[0033] Optionally, the support column 6 is made of high-temperature ceramic, silicon carbide composite material or alumina ceramic.

[0034] Specifically, the support column 6 can be cylindrical, and the material can be any one of high-temperature ceramic, silicon carbide composite material or alumina ceramic; the support columns 6 are arranged at intervals in the heat insulation cavity 5 between the inner shell and the outer shell, and their two ends are fixedly connected to the outer wall of the inner shell 3 and the inner wall of the outer shell 4 respectively, and each support column 6 is evenly distributed in the heat insulation cavity 5, without direct connection to the heat-resistant cotton lining of the sensor body and the inner wall of the outer shell.

[0035] Optionally, the inner shell 3 is made of nickel-chromium-iron-molybdenum alloy material. This material has certain high temperature resistance and hardness, but is not magnetic. Under these conditions, it has excellent oxidation resistance, good high temperature strength and excellent thermal shock resistance. Even if the heat insulation cavity 5 and the outer shell 4 are damaged by molten steel, it can still protect the internal probe body structure from interference, and will not interfere with the signal transmission of the sensor body 1.

[0036] Optionally, the outer shell 4 is made of titanium alloy. Titanium alloy has excellent specific strength, corrosion resistance, especially resistance to molten slag erosion, and a low coefficient of thermal expansion. In addition, titanium alloy itself is non-magnetic, which protects the sensor body 1 without interfering with the signal transmission of the sensor body 1.

[0037] Optionally, the sensor packaging structure further includes nozzles 8 disposed around the sensor body 1, the outlet direction of the nozzles 8 covering the sensor detection surface area, and the nozzles 8 being connected to a compressed air supply system to deliver high-pressure airflow to the sensor detection surface area.

[0038] Specifically, the nozzle 8 is a tubular structure, made of high-temperature resistant stainless steel or ceramic matrix composite material. It provides a cleaning power pressure range of 0.4-0.8 MPa. Multiple nozzles 8 are arranged in a uniform ring around the probe. The nozzles 8 are separate from the outer shell 4 of the sensor encapsulation structure, and are not directly connected to the inner shell 3, heat insulation cavity 5, support column 6, or other internal encapsulation structures. The outlet direction of the nozzles 8 precisely faces and covers the sensor detection surface area. The nozzles 8 can be connected to a compressed air supply system, delivering high-pressure airflow to the sensor detection surface area, creating an "air knife" effect to physically peel off the molten or semi-solid steel slag shell adhering to the detection surface. Furthermore, the high-speed airflow ejected from the nozzles 8 can simultaneously remove some heat from the detection surface and the outer shell 4, achieving auxiliary cooling of the probe detection surface area.

[0039] In this embodiment, the nozzle 8 is designed so that the airflow ejected from the nozzle 8 can directly remove molten steel splashes and slag from the detection surface, preventing slag from clogging the sensing surface or interfering with the magnetic field signal. This solves the problem of poor resistance to molten steel splashes and slag formation in existing sensors, ensuring the accuracy of liquid level measurement data and preventing false alarms, false shutdowns, or system malfunctions. The auxiliary cooling effect of the nozzle 8 can reduce the local temperature of the detection surface and the outer shell 4, alleviating the thermal deformation of the outer shell 4 caused by high temperature, and indirectly ensuring the geometric stability of the heat insulation cavity 5. The uniform arrangement of multiple nozzles 8 and the precise design of the outlet direction can achieve full coverage cleaning of the detection surface, ensuring that all areas of the detection surface remain clean, further improving the stability of liquid level monitoring. Finally, it forms a collaborative protection system with the inner shell 3, the heat insulation cavity 5, the support column 6, and other structures of the encapsulation structure, significantly enhancing the overall service performance of the sensor under extreme conditions of continuous casting of ultra-large cross-section round billets.

[0040] Optionally, the sensor packaging structure further includes a temperature sensing element disposed between the inner shell 3 and the sensor body 1 or disposed inside the outer shell 4. The temperature sensing element is communicatively connected to the nozzle 8 and is used to activate the nozzle 8 when the temperature detected by the temperature sensing element undergoes abnormal fluctuations.

[0041] Specifically, the temperature sensing element is a miniature sheet or needle-like structure, and can be a high-temperature resistant thermocouple or a thermistor. This temperature sensing element has two placement methods: one is to be fixedly attached between the inner shell 3 and the sensor body 1, and the other is to be embedded and fixed inside the outer shell 4. The temperature sensing element and the nozzle 8 are electrically connected, allowing the collected temperature data to be transmitted in real time to the control unit of the nozzle 8 to trigger the blowing action of the nozzle 8. When the temperature sensing element is placed between the inner shell 3 and the sensor body 1, it can directly monitor the temperature around the sensor body 1, accurately reflecting the temperature status of the internal core components. When the temperature sensing element is placed inside the outer shell 4, it can capture changes in external heat transmitted by the outer shell 4 in real time, indirectly reflecting the thermal environment of the probe surface. On the other hand, the temperature sensing element can identify abnormal temperature fluctuations and convert these abnormal signals into trigger commands to drive the nozzle 8 to start blowing, realizing the linkage between temperature measurement and cleaning actions.

[0042] Optionally, the sensor packaging structure further includes a timer, which is communicatively connected to the nozzle 8. The timer is used to send a start or stop signal to the nozzle 8 at a preset period to start or stop the operation of the nozzle 8.

[0043] Specifically, the timer is a miniature integrated circuit module structure, which can be an integrated circuit chip encapsulated in high-temperature epoxy resin. The timer and the sensor's encapsulation structure, including the inner shell 3, outer shell 4, heat insulation cavity 5, and support column 6, are separate mechanical structures. The timer does not have a direct physical connection with the aforementioned mechanical structures, but only establishes an electrical signal connection with the nozzle 8, and can transmit timed start or stop control signals to the nozzle 8. The timer can pre-store control parameters such as the purging cycle and the duration of a single purging. It can automatically send a start signal to the nozzle 8 according to a preset time cycle, such as every 30 seconds to 5 minutes, to drive the high-pressure airflow ejected by the nozzle 8 to clean the detection surface. On the other hand, when a single purging reaches a preset duration, such as 5-15 seconds, the timer can automatically send a stop signal to the nozzle 8 to terminate the purging action of the nozzle 8, realizing automated timed start and stop control of the nozzle 8 purging process.

[0044] An embodiment of the present invention provides a sensor, including the sensor packaging structure described above.

[0045] The advantages of the sensor in this embodiment over the prior art are the same as those of the sensor packaging structure described above, and will not be repeated here.

[0046] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A sensor packaging structure, characterized in that, include: Inner shell (3), the inner shell (3) is used to be disposed outside the sensor body (1); The outer shell (4) is fitted outside the inner shell (3), and a heat insulation cavity (5) is provided between the inner shell (3) and the outer shell (4). Several support columns (6) are arranged at intervals in the heat insulation cavity (5), and the heat insulation cavity (5) is filled with inert gas.

2. The sensor packaging structure according to claim 1, characterized in that, The inner wall of the outer shell (4) is provided with a heat-resistant cotton lining (7).

3. The sensor packaging structure according to claim 2, characterized in that, It also includes an ultra-high temperature resistant functional coating applied to the outer surface of the housing (4).

4. The sensor packaging structure according to claim 1, characterized in that, The support column (6) is made of high-temperature ceramic, silicon carbide composite material or alumina ceramic.

5. The sensor packaging structure according to claim 1, characterized in that, The inner shell (3) is made of nickel-chromium-iron-molybdenum alloy material.

6. The sensor packaging structure according to claim 1, characterized in that, The outer shell (4) is made of titanium alloy.

7. The sensor packaging structure according to claim 1, characterized in that, It also includes nozzles (8) arranged around the sensor body (1), the outlet direction of the nozzles (8) covering the sensor detection surface area, and the nozzles (8) being used to connect to a compressed air supply system to deliver high-pressure airflow to the sensor detection surface area.

8. The sensor packaging structure according to claim 7, characterized in that, It also includes a temperature measuring element disposed between the inner shell (3) and the sensor body (1) or disposed inside the outer shell (4). The temperature measuring element is communicatively connected to the nozzle (8). When the temperature detected by the temperature measuring element fluctuates abnormally, the nozzle (8) is activated.

9. The sensor packaging structure according to claim 7, characterized in that, It also includes a timer, which is communicatively connected to the nozzle (8). The timer is used to send a start or stop signal to the nozzle (8) at a preset period to start or stop the operation of the nozzle (8).

10. A sensor, characterized in that, Includes the sensor packaging structure as described in any one of claims 1 to 9.

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