A high temperature resistant ceramic packaged sootblower leak detection sensor and calibration method

Abstract

The present disclosure relates to a high-temperature-resistant ceramic packaged sootblower leakage detection sensor and a calibration method, which comprises an infrared temperature sensor, a sealed sleeve and a transmission lead wire; the sealed sleeve is made of ceramic material, and the infrared temperature sensor is arranged in the sealed sleeve; one end of the transmission lead wire is connected to the infrared temperature sensor, and the other end penetrates out of the sealed sleeve; a tapered lead-out hole and a connecting portion corresponding to the tapered lead-out hole are arranged on the sealed sleeve, a tapered sealing sleeve is arranged in the tapered lead-out hole, and a ceramic screw joint abutting against the tapered sealing sleeve is threadedly connected to the connecting portion; a first light transmission opening corresponding to a probe of the infrared temperature sensor is further arranged on the sealed sleeve, and a first lens is arranged on the inner side of the first light transmission opening. The high-temperature-resistant ceramic packaged sootblower leakage detection sensor can better adapt to the harsh working environment of the sootblower and ensure the stability of the sensor detection precision.

Description

Technical Field

[0001] This disclosure relates to the field of sootblower leakage detection technology, specifically to a high-temperature ceramic-encapsulated sootblower leakage detection sensor and calibration method. Background Technology

[0002] Sootblowers are devices used to remove ash accumulated on the heating surfaces of boilers. They operate under high temperature and high pressure dust conditions (around 300℃) and must withstand high-frequency vibrations. Steam leakage in the sootblower pipeline not only reduces blowing efficiency and wastes energy, but can also lead to equipment corrosion, damage, and even safety accidents. Therefore, real-time leak detection using sensors is necessary.

[0003] However, traditional sootblower leak detection sensors are limited by their own structure and material properties, making it difficult to adapt to the harsh working environment of sootblowers. Under harsh conditions of high temperature, high dust, and high steam scouring, the shell material of traditional sensors is prone to thermal deformation, aging and cracking, which can lead to water and dust entering the sensor, resulting in signal drift and distortion, affecting normal detection. Summary of the Invention

[0004] The purpose of this disclosure is to provide a high-temperature ceramic-encapsulated leak detection sensor for sootblowers, which is better suited to the harsh working environment of sootblowers and ensures stable sensor detection accuracy.

[0005] To achieve the above objectives, this disclosure provides a high-temperature ceramic-encapsulated sootblower leakage detection sensor, including an infrared temperature sensor, a sealing sleeve, and a transmission wire. The sealing sleeve is made of ceramic material, and the infrared temperature sensor is disposed within the sealing sleeve. The infrared temperature sensor is used to detect steam leakage from the sootblower. One end of the transmission wire is electrically connected to the infrared temperature sensor, and the other end extends out of the sealing sleeve and is used to connect to an external receiving device. The sealing sleeve has a tapered lead-out hole and a corresponding connecting portion, and the tapered lead-out hole contains a passage for the transmission wire to pass through. A conical sealing sleeve has an outer diameter that gradually increases from the inner end to the outer end of the conical outlet hole. A ceramic screw connector is threaded onto the connecting part, and the ceramic screw connector abuts against the conical sealing sleeve to allow the conical sealing sleeve to move into the conical outlet hole and seal against both the transmission wire and the conical outlet hole. The sealing sleeve is also provided with a first light-transmitting opening corresponding to the probe of the infrared temperature sensor. A first lens is matched and disposed inside the first light-transmitting opening. The first lens is used for dust prevention and allows the infrared rays received by the infrared temperature sensor to pass through. The first lens is sealed and connected to the first light-transmitting opening.

[0006] Optionally, an arc-shaped ceramic substrate is coaxially disposed inside the sealing sleeve. The outer side wall of the arc-shaped ceramic substrate is in contact with the inner side wall of the sealing sleeve. One end of the arc-shaped ceramic substrate is provided with a mounting plate. A mounting hole is opened on the mounting plate. The infrared temperature sensor is limited and installed in the mounting hole. The probe of the infrared temperature sensor, the mounting hole, and the sealing sleeve are arranged coaxially.

[0007] Optionally, the inner wall of the sealing sleeve is provided with an annular limiting flange, and the mounting plate is mounted on the limiting flange so that a first preset distance is formed between the probe of the infrared temperature sensor and the first lens.

[0008] Optionally, it also includes an outer protective sleeve, one end of which has an opening. The outer protective sleeve is fitted onto the sealing sleeve through the opening, and the inner wall of the outer protective sleeve is threadedly connected to the outer wall of the sealing sleeve. The other end of the outer protective sleeve has a second light-transmitting opening that is coaxial with the first light-transmitting opening and located outside the first light-transmitting opening.

[0009] Optionally, a first annular groove is provided at one end of the first light-transmitting opening near the second light-transmitting opening, and the first lens is installed in the first annular groove.

[0010] Optionally, a second annular groove is provided at the end of the second light-transmitting opening away from the first light-transmitting opening, a second lens is fixedly provided in the second annular groove, and a second preset distance is provided between the second lens and the first lens.

[0011] Optionally, both the first lens and the second lens are sapphire optical lenses.

[0012] Optionally, it also includes a snap-fit ​​component disposed on the outer wall of the outer protective sleeve. The snap-fit ​​component includes an integrally formed straight fixing part and an arc-shaped snap-fit ​​part. A slot is provided axially on the outer wall of the outer protective sleeve. The slot penetrates at least one end of the outer protective sleeve and forms an insertion interface. One end of the straight fixing part is inserted into the slot through the insertion interface. The arc-shaped snap-fit ​​part has a snap-fit ​​interface for snapping with a pipe. The other end of the straight fixing part is fixedly connected to the side of the arc-shaped snap-fit ​​part opposite to the snap-fit ​​interface.

[0013] Optionally, the connecting part is constructed as an annular flange, and the ceramic screw connector is provided with a clearance hole corresponding to the tapered lead-out hole. The ceramic screw connector includes a connected threaded section and a gripping section. The threaded section is threadedly connected to the inner wall of the annular flange. A limiting groove is formed at the end of the threaded section away from the gripping section, and the tapered sealing sleeve abuts against the bottom wall of the limiting groove. The gripping section is constructed as a polygon and can abut against the outer end of the connecting part.

[0014] Based on the above technical solutions, this disclosure also provides a calibration method for a high-temperature ceramic-encapsulated sootblower leakage detection sensor, used to calibrate the above-mentioned high-temperature ceramic-encapsulated sootblower leakage detection sensor, including the following steps:

[0015] S100. Build a calibration platform. The calibration platform includes a constant temperature heating furnace, a standard temperature source, a sealed calibration cover, a data acquisition instrument, and a terminal block adapted to the transmission wire. The sealed calibration cover has a calibration light-transmitting port that corresponds to the first light-transmitting port and the second light-transmitting port and is arranged coaxially. A calibration lens that matches the first lens and the second lens is installed in the calibration light-transmitting port. S200. Fix the high-temperature ceramic-encapsulated sootblower leakage detection sensor to be calibrated onto the sealed calibration cover, aligning the probe of the infrared temperature sensor with the standard temperature source through the first light-transmitting port, the second light-transmitting port, and the calibration light-transmitting port, ensuring that the infrared temperature sensor can receive the infrared radiation emitted by the standard temperature source through the first lens, the second lens, and the calibration lens, and simultaneously connect the transmission wire to the data acquisition instrument through the terminal block; S300. Set the heating parameters of the constant temperature heating furnace, and control the standard temperature source to be stabilized at multiple preset calibration temperature points in sequence. The preset calibration temperature points cover the normal working temperature of the soot blower and the abnormal temperature range of steam leakage. Each preset calibration temperature point is stabilized for a preset duration. S400. The data acquisition instrument acquires the detection temperature data output by the high-temperature ceramic-encapsulated sootblower leakage detection sensor at each preset calibration temperature point, and simultaneously records the standard temperature data of the corresponding preset calibration temperature point, and calculates the deviation value between the detection temperature data and the standard temperature data at each temperature point. S500: Determine whether the deviation value of each temperature point is within the preset allowable deviation range. If all deviation values ​​are within the preset allowable deviation range, the calibration is qualified and the calibration is completed. If there is a deviation value that exceeds the preset allowable deviation range, adjust the detection parameters of the infrared temperature sensor and repeat steps S100 to S500 until all deviation values ​​are within the preset allowable deviation range.

[0016] Through the above technical solution, the high-temperature ceramic-encapsulated sootblower leakage detection sensor disclosed herein includes an infrared temperature sensor, a sealing sleeve, and a transmission wire. The infrared temperature sensor is disposed inside the sealing sleeve. A conical sealing sleeve is provided in the conical lead-out hole of the sealing sleeve for the transmission wire to pass through. The sealing sleeve has a connecting part corresponding to the conical lead-out hole. A ceramic screw connector is threaded onto the connecting part. The ceramic screw connector abuts against the conical sealing sleeve, so that the conical sealing sleeve, the transmission wire, and the conical lead-out hole are all sealed and abutted. Since the sealing sleeve and the ceramic screw connector are both made of ceramic material, they can withstand the high temperature conditions of the sootblower at around 300°C for a long time, avoiding problems such as thermal deformation, aging and cracking, thus extending the overall service life of the high-temperature ceramic-encapsulated sootblower leakage detection sensor and adapting to harsh high-temperature working environments.

[0017] In addition, this disclosure achieves double sealing of the transmission wire and the conical lead-out hole through the cooperation of the conical sealing sleeve and the ceramic screw connector. At the same time, the first lens and the first light-transmitting port are sealed together to ensure the overall sealing of the structure. This can effectively isolate external steam and dust, prevent water and dust from entering the internal infrared temperature sensor, avoid signal drift and detection distortion, and ensure stable detection accuracy.

[0018] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the high-temperature ceramic-encapsulated sootblower leakage detection sensor provided in the embodiments of this disclosure; Figure 2 This is another structural schematic diagram of the high-temperature ceramic-encapsulated sootblower leakage detection sensor provided in this embodiment of the present disclosure; Figure 3 yes Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is another structural schematic diagram of the high-temperature ceramic-encapsulated sootblower leakage detection sensor provided in the embodiments of this disclosure; Figure 5 This is another structural schematic diagram of the high-temperature ceramic-encapsulated sootblower leakage detection sensor provided in the embodiments of this disclosure.

[0020] Explanation of reference numerals in the attached drawings: 10, Infrared temperature sensor; 11, Probe; 20, Sealing sleeve; 21, Conical lead-out hole; 22, Connecting part; 23, First light-transmitting opening; 231, First annular groove; 24, Limiting flange; 30, Transmission wire; 40, Conical sealing sleeve; 50, Ceramic screw connector; 51, Clearance hole; 52, Threaded section; 521, Limiting groove; 53, Grip section; 60, First lens; 70, Arc-shaped ceramic substrate; 71, Mounting plate; 711, Mounting hole; 80, Outer protective sleeve; 81, Opening; 82, Second light-transmitting opening; 821, Second annular groove; 83, Second lens; 84, Slot; 841, Insertion interface; 90, Snap-fit ​​connector; 91, Straight fixing part; 92, Arc-shaped snap-fit ​​part; 921, Snap-fit ​​interface. Detailed Implementation

[0021] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0022] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" are used relative to the contour of the corresponding component itself. Furthermore, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. In the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.

[0023] According to exemplary embodiments of this disclosure, reference is made to Figures 1 to 5This invention provides a high-temperature ceramic-encapsulated leak detection sensor for sootblowers, comprising an infrared temperature sensor 10, a sealing sleeve 20, and a transmission wire 30. The sealing sleeve 20 is made of ceramic material, and the infrared temperature sensor 10 is disposed inside the sealing sleeve 20 for detecting steam leakage from the sootblower. One end of the transmission wire 30 is electrically connected to the infrared temperature sensor 10, and the other end extends out of the sealing sleeve 20 and is used to connect to an external receiving device. The sealing sleeve 20 has a tapered lead-out hole 21 and a corresponding connecting part 22. A tapered sealing sleeve for the transmission wire 30 to pass through is disposed inside the tapered lead-out hole 21. 40. The outer diameter of the conical sealing sleeve 40 gradually increases from the inner end to the outer end of the conical outlet hole 21. A ceramic screw connector 50 is threaded onto the connecting part 22. The ceramic screw connector 50 abuts against the conical sealing sleeve 40 so that the conical sealing sleeve 40 moves into the conical outlet hole 21 and seals against the transmission wire 30 and the conical outlet hole 21. The sealing sleeve 20 is also provided with a first light-transmitting port 23 corresponding to the probe 11 of the infrared temperature sensor 10. A first lens 60 is matched and provided inside the first light-transmitting port 23. The first lens 60 is used for dust prevention and allows the infrared rays received by the infrared temperature sensor 10 to pass through. The first lens 60 is sealed and connected to the first light-transmitting port 23.

[0024] Through the above technical solution, the high-temperature ceramic-encapsulated sootblower leakage detection sensor disclosed herein includes an infrared temperature sensor 10, a sealing sleeve 20, and a transmission wire 30. The infrared temperature sensor 10 is disposed inside the sealing sleeve 20. A conical sealing sleeve 40 for the transmission wire 30 to pass through is disposed inside the conical lead-out hole 21 of the sealing sleeve 20. The sealing sleeve 20 is provided with a connecting part 22 corresponding to the conical lead-out hole 21. A ceramic screw connector 50 is threadedly connected to the connecting part 22. The ceramic screw connector 50 abuts against the conical sealing sleeve 40 so that the conical sealing sleeve 40, the transmission wire 30, and the conical lead-out hole 21 are all sealed and abutted. Since the sealing sleeve 20 and the ceramic screw connector 50 are both made of ceramic material, they can withstand the high temperature conditions of the sootblower at around 300°C for a long time, avoiding the problems of thermal deformation, aging and cracking, thus extending the overall service life of the high-temperature ceramic-encapsulated sootblower leakage detection sensor and adapting to harsh high-temperature working environments.

[0025] In addition, this disclosure achieves a double seal between the transmission wire 30 and the tapered lead-out hole 21 by cooperating with the conical sealing sleeve 40 and the ceramic screw connector 50. At the same time, the first lens 60 and the first light-transmitting port 23 are sealed together to ensure the overall sealing of the structure. This effectively isolates external steam and dust, prevents water and dust from entering the internal infrared temperature sensor 10, avoids signal drift and detection distortion, and ensures stable detection accuracy.

[0026] In this disclosure, the infrared temperature sensor 10 uses the principle of infrared temperature measurement to capture the temperature change when steam leaks in the sootblower pipeline (the temperature of the leaking steam is significantly different from the ambient temperature) to achieve leak detection; the transmission wire 30 is a signal transmission carrier that transmits the temperature signal detected by the infrared temperature sensor 10 to an external receiving device (such as a controller or display) to achieve real-time signal feedback.

[0027] A conical sealing sleeve 40 is fitted onto the transmission wire 30 and placed inside the conical outlet hole 21. The outer diameter of the conical sealing sleeve 40 gradually increases from the inner end to the outer end of the conical outlet hole 21, matching the contour of the inner wall of the conical outlet hole 21. A ceramic screw connector 50 abuts against the conical sealing sleeve 40. When the ceramic screw connector 50 is tightened, it pushes the conical sealing sleeve 40 into the conical outlet hole 21. Due to the conical structure of the conical sealing sleeve 40, it gradually contracts during movement, tightly abutting against the outer wall of the transmission wire 30 and the inner wall of the conical outlet hole 21, forming a double seal. Simultaneously, the ceramic screw connector 50 is also made of ceramic material, consistent with the material of the sealing sleeve 20, ensuring uniform high-temperature resistance and guaranteeing a sealing effect.

[0028] The conical sealing sleeve 40 can be a conical ceramic sealing sleeve with a certain elastic deformation capability, which is resistant to high temperature and can produce a certain deformation. Of course, the conical sealing sleeve 40 can also be made of other high-temperature resistant sealing materials such as high-temperature resistant silicone or ceramic fiber composite material, as long as it can achieve a sealed contact with the transmission wire 30 and the conical lead-out hole 21. This disclosure does not limit this.

[0029] According to exemplary embodiments of this disclosure, such as Figure 1 and Figure 2 As shown, an arc-shaped ceramic substrate 70 can be coaxially arranged inside the sealing sleeve 20. The outer side wall of the arc-shaped ceramic substrate 70 is in contact with the inner side wall of the sealing sleeve 20. One end of the arc-shaped ceramic substrate 70 is provided with a mounting plate 71. The mounting plate 71 has a mounting hole 711. The infrared temperature sensor 10 is limited and installed in the mounting hole 711. The probe 11 of the infrared temperature sensor 10, the mounting hole 711 and the sealing sleeve 20 are arranged coaxially. By using the above technical solution, the infrared temperature sensor 10 is limited and installed using the mounting holes 711 on the mounting plate 71, which effectively prevents the infrared temperature sensor 10 from shaking inside the sealing sleeve 20. This better adapts to the high-frequency vibration conditions of the sootblower, avoids vibration causing the infrared temperature sensor 10 to shift position or loosen internal wiring, and ensures stable detection. At the same time, the above installation method ensures that the probe 11 is precisely aligned with the first light-transmitting port 23, and the infrared light can pass through the first lens 60 vertically, reducing the loss and offset of the infrared signal, improving the accuracy of temperature detection, and thus improving the reliability of steam leak detection.

[0030] The infrared temperature sensor 10 and the mounting hole 711 can be connected by interference fit or by high temperature resistant adhesive. This disclosure does not impose any specific restrictions on this.

[0031] According to exemplary embodiments of this disclosure, such as Figure 1 and Figure 2 As shown, the inner wall of the sealing sleeve 20 can be provided with an annular limiting flange 24. The mounting plate 71 is mounted on the limiting flange 24 to form a first preset distance between the probe 11 of the infrared temperature sensor 10 and the first lens 60. Here, the limiting flange 24 can be integrally formed with the sealing sleeve 20. The mounting plate 71 can be installed on the limiting flange 24 by bolts. The limiting flange 24 axially limits the mounting plate 71, thereby limiting the axial position of the infrared temperature sensor 10 within the sealing sleeve 20. Ultimately, the first preset distance is formed between the probe 11 of the infrared temperature sensor 10 and the first lens 60. The range of the first preset distance can be set to 3-8 mm to match the detection range of the infrared temperature sensor 10, ensuring that the probe 11 can accurately capture external temperature changes through the first lens 60, while avoiding contact between the probe 11 and the first lens 60 to prevent lens wear or probe 11 contamination.

[0032] According to exemplary embodiments of this disclosure, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the high-temperature ceramic-encapsulated sootblower leakage detection sensor may further include an outer protective sleeve 80. One end of the outer protective sleeve 80 has an opening 81, which is fitted onto the sealing sleeve 20. The inner wall of the outer protective sleeve 80 is threadedly connected to the outer wall of the sealing sleeve 20. The other end of the outer protective sleeve 80 has a second light-transmitting opening 82, which is coaxial with the first light-transmitting opening 23 and located outside the first light-transmitting opening 23. In the above technical solution, the outer protective sleeve 80 is fitted onto the outside of the sealing sleeve 20, forming a double protective structure. This further isolates the external high temperature, dust, and steam erosion, while reducing heat conduction in the sealing sleeve 20, providing a more stable working environment for the internal infrared temperature sensor 10. The threaded connection between the outer protective sleeve 80 and the sealing sleeve 20 makes installation and disassembly more convenient and easier to maintain.

[0033] According to exemplary embodiments of this disclosure, such as Figure 1 and Figure 2 As shown, a first annular groove 231 is formed at the end of the first light-transmitting opening 23 near the second light-transmitting opening 82, and the first lens 60 is installed in the first annular groove 231. The size of the first annular groove 231 can be adapted to the shape of the first lens 60, so as to achieve precise positioning and fixation of the first lens 60, and at the same time facilitate the sealing connection between the first lens 60 and the first light-transmitting opening 23, ensuring sealing performance.

[0034] To improve sealing performance, high-temperature sealant can be applied between the first lens 60 and the inner wall of the first annular groove 231 for sealing and fixation.

[0035] According to exemplary embodiments of this disclosure, such as Figure 1 and Figure 2 As shown, a second annular groove 821 can be formed at the end of the second light-transmitting opening 82 away from the first light-transmitting opening 23. A second lens 83 is fixedly installed in the second annular groove 821, and a second preset distance is provided between the second lens 83 and the first lens 60. Similarly, the size of the second annular groove 821 is adapted to the shape of the second lens 83 to achieve precise positioning and fixation of the second lens 83. The second preset distance between the second lens 83 and the first lens 60 can avoid wear caused by contact between the first lens 60 and the second lens 83, and can also ensure that the infrared signal can be transmitted smoothly. At the same time, the first lens 60 and the second lens 83 form a double dustproof and steamproof structure, which can effectively block external dust and steam from entering the interior of the sealing sleeve 20.

[0036] Similarly, in order to improve the sealing performance, high-temperature sealant can be applied between the second lens 83 and the inner wall of the second annular groove 821 for sealing and fixing.

[0037] Furthermore, it should be noted that by setting the second lens 83, a second preset distance is provided between the second lens 83 and the first lens 60. This creates an air insulation layer between the second lens 83 and the first lens 60. The air insulation layer effectively blocks external high temperatures from being directly conducted to the interior of the sealing sleeve 20 through the second lens 83 and the first lens 60, reducing the thermal impact of high temperatures on the infrared temperature sensor 10 and preventing signal drift, aging, and damage to the internal electronic components of the infrared temperature sensor 10 due to high temperatures. The second preset distance can be set to 5–10 mm.

[0038] According to an exemplary embodiment of this disclosure, both the first lens 60 and the second lens 83 can be sapphire optical lenses. Sapphire optical lenses are resistant to high temperatures (can withstand temperatures above 300°C for extended periods), wear-resistant, and corrosion-resistant. Furthermore, sapphire optical lenses have high infrared transmittance, effectively allowing infrared light received by the infrared temperature sensor 10 to pass through. They also have excellent dustproof and waterproof performance, making them suitable for the harsh operating conditions of soot blowers.

[0039] According to exemplary embodiments of this disclosure, such as Figure 1 , Figure 4 and Figure 5As shown, the high-temperature ceramic-encapsulated sootblower leakage detection sensor disclosed herein may further include a snap-fit ​​component 90 disposed on the outer wall of the outer protective sleeve 80. The snap-fit ​​component 90 includes an integrally formed flat fixing part 91 and an arc-shaped snap-fit ​​part 92. A slot 84 is provided axially on the outer wall of the outer protective sleeve 80. The slot 84 penetrates at least one end of the outer protective sleeve 80 and forms an insertion interface 841. One end of the flat fixing part 91 is inserted and connected to the slot 84 through the insertion interface 841. The arc-shaped snap-fit ​​part 92 has a snap-fit ​​interface 921 for snapping with a pipe. The other end of the flat fixing part 91 is fixedly connected to the side of the arc-shaped snap-fit ​​part 92 away from the snap-fit ​​interface 921.

[0040] In the above technical solution, the arc-shaped snap-fit ​​part 92 of the snap-fit ​​part 90 can be directly snapped onto the sootblower pipe to install the sootblower leakage detection sensor with high temperature ceramic encapsulation. The straight fixing part 91 is inserted into the slot 84 of the outer protective sleeve 80 to facilitate the installation or removal of the snap-fit ​​part 90 and the outer protective sleeve 80, and to facilitate the replacement of the snap-fit ​​part 90 with the corresponding specification according to the pipe specification.

[0041] To reduce the impact of vibration on the sootblower leakage detection sensor in this high-temperature ceramic package, a high-temperature resistant buffer pad (not shown in the figure) can be attached to the inside of the card interface 921 of the arc-shaped card connector 92. For example, a ceramic fiber buffer pad can be used, which has high thermal insulation efficiency and good shock resistance.

[0042] According to exemplary embodiments of this disclosure, such as Figure 2 and Figure 3 As shown, the connecting part 22 can be constructed as an annular flange. The ceramic screw connector 50 is provided with a clearance hole 51 corresponding to the conical lead-out hole 21. The ceramic screw connector 50 includes a connected threaded section 52 and a holding section 53. The threaded section 52 is threadedly connected to the inner wall of the annular flange. A limiting groove 521 is provided at the end of the threaded section 52 away from the holding section 53. The conical sealing sleeve 40 abuts against the bottom wall of the limiting groove 521. The holding section 53 is constructed as a polygon and can abut against the outer end of the connecting part 22. The annular flange can be integrally formed with the sealing sleeve 20. The annular flange is threadedly connected to the ceramic screw connector 50 and can also limit the ceramic screw connector 50 to prevent the ceramic screw connector 50 from being over-screwed in, which would damage the conical sealing sleeve 40.

[0043] In the above technical solution, the grip section 53 is constructed as a polygon, which facilitates tightening or loosening of the ceramic screw connector 50 with the aid of tools (such as a wrench), thereby improving the ease of operation.

[0044] Based on the above technical solutions, this disclosure also provides a calibration method for a high-temperature ceramic-encapsulated sootblower leakage detection sensor, used to calibrate the above-mentioned high-temperature ceramic-encapsulated sootblower leakage detection sensor, including the following steps: S100. Set up a calibration platform. The calibration platform includes a constant temperature heating furnace, a standard temperature source, a sealed calibration cover, a data acquisition instrument, and a terminal block adapted to the transmission wire 30. The sealed calibration cover has a calibration light-transmitting port that corresponds to the first light-transmitting port 23 and the second light-transmitting port 82 and is arranged coaxially. A calibration lens that matches the first lens 60 and the second lens 83 is installed in the calibration light-transmitting port. S200. Fix the high-temperature ceramic-encapsulated sootblower leakage detection sensor to be calibrated onto the sealed calibration cover, so that the probe 11 of the infrared temperature sensor 10 is aligned with the standard temperature source through the first light-transmitting port 23, the second light-transmitting port 82, and the calibration light-transmitting port, ensuring that the infrared temperature sensor 10 can receive the infrared radiation emitted by the standard temperature source through the first lens 60, the second lens 83, and the calibration lens. At the same time, connect the transmission wire 30 to the data acquisition instrument through the terminal block. S300: Set the heating parameters of the constant temperature heating furnace, control the standard temperature source to stabilize at multiple preset calibration temperature points in sequence, the preset calibration temperature points cover the normal working temperature of the soot blower and the abnormal temperature range of steam leakage, and each preset calibration temperature point is stabilized for a preset time. S400: The high-temperature ceramic-encapsulated sootblower leakage detection sensor is acquired by a data acquisition instrument to collect the detection temperature data output at each preset calibration temperature point, and the standard temperature data of the corresponding preset calibration temperature point is recorded at the same time. The deviation between the detection temperature data and the standard temperature data at each temperature point is calculated. S500: Determine whether the deviation value of each temperature point is within the preset allowable deviation range. If all deviation values ​​are within the preset allowable deviation range, the calibration is qualified and the calibration is completed. If there are deviation values ​​that exceed the preset allowable deviation range, adjust the detection parameters of the infrared temperature sensor 10 and repeat steps S100 to S500 until all deviation values ​​are within the preset allowable deviation range.

[0045] In the above technical solution, the constant temperature heating furnace is used to simulate the high-temperature working environment of the sootblower and control the temperature stability of the standard temperature source; the standard temperature source is used to provide a precise standard temperature as a calibration reference; the sealed calibration cover is used to fix the high-temperature ceramic-encapsulated sootblower leakage detection sensor to be calibrated, and the calibration light-transmitting port on the sealed calibration cover corresponds to and is coaxially arranged with the first light-transmitting port 23 and the second light-transmitting port 82 to ensure smooth infrared signal transmission. The calibration lens installed in the calibration light-transmitting port matches the first lens 60 and the second lens 83 to simulate the infrared light transmission environment of the high-temperature ceramic-encapsulated sootblower leakage detection sensor during actual operation, avoiding the decrease in calibration accuracy due to the difference between the calibration environment and the actual working environment; the data acquisition instrument is used to collect the detection temperature data output by the infrared temperature sensor 10, and the wiring terminal is used to connect the transmission wire 30 to the data acquisition instrument to ensure smooth signal transmission.

[0046] By using the above calibration method, the calibration results are ensured to match the actual working scenario, effectively eliminating the detection deviation of the high-temperature ceramic-encapsulated sootblower leak detection sensor caused by environmental influences. This ensures that the detection accuracy of the high-temperature ceramic-encapsulated sootblower leak detection sensor is stable within the preset allowable range, guaranteeing the accuracy of steam leak detection and avoiding missed or false detections.

[0047] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0048] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0049] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A high-temperature ceramic-encapsulated leak detection sensor for soot blowers, characterized in that, include Infrared temperature sensor (10), sealing sleeve (20) and transmission wire (30); The sealing sleeve (20) is made of ceramic material, and the infrared temperature sensor (10) is set inside the sealing sleeve (20). The infrared temperature sensor (10) is used to detect steam leakage from the sootblower. One end of the transmission wire (30) is electrically connected to the infrared temperature sensor (10), and the other end extends out of the sealing sleeve (20) and is used to connect to an external receiving device; The sealing sleeve (20) is provided with a conical outlet hole (21) and a connecting part (22) corresponding to the conical outlet hole (21). A conical sealing sleeve (40) for the transmission wire (30) to pass through is provided in the conical outlet hole (21). The outer diameter of the conical sealing sleeve (40) gradually increases from the inner end to the outer end of the conical outlet hole (21). A ceramic screw connector (50) is threaded on the connecting part (22). The ceramic screw connector (50) abuts against the conical sealing sleeve (40) so that the conical sealing sleeve (40) moves into the conical outlet hole (21) and seals against both the transmission wire (30) and the conical outlet hole (21). The sealing sleeve (20) is also provided with a first light-transmitting port (23) corresponding to the probe (11) of the infrared temperature sensor (10). A first lens (60) is matched and arranged inside the first light-transmitting port (23). The first lens (60) is used to prevent dust and allow the infrared rays received by the infrared temperature sensor (10) to pass through. The first lens (60) is sealed and connected to the first light-transmitting port (23).

2. The high-temperature ceramic-encapsulated sootblower leakage detection sensor according to claim 1, characterized in that, An arc-shaped ceramic substrate (70) is coaxially arranged inside the sealing sleeve (20). The outer side wall of the arc-shaped ceramic substrate (70) is in contact with the inner side wall of the sealing sleeve (20). One end of the arc-shaped ceramic substrate (70) is provided with a mounting plate (71). A mounting hole (711) is opened on the mounting plate (71). The infrared temperature sensor (10) is limited and installed in the mounting hole (711). The probe (11) of the infrared temperature sensor (10), the mounting hole (711) and the sealing sleeve (20) are arranged coaxially.

3. The high-temperature ceramic-encapsulated sootblower leakage detection sensor according to claim 2, characterized in that, The inner wall of the sealing sleeve (20) is provided with an annular limiting flange (24), and the mounting plate (71) is mounted on the limiting flange (24) so ​​that a first preset distance is formed between the probe (11) of the infrared temperature sensor (10) and the first lens (60).

4. The high-temperature ceramic-encapsulated sootblower leakage detection sensor according to claim 3, characterized in that, It also includes an outer protective sleeve (80), one end of which has an opening (81). The outer protective sleeve (80) is fitted onto the sealing sleeve (20) through the opening (81), and the inner wall of the outer protective sleeve (80) is threadedly connected to the outer wall of the sealing sleeve (20). The other end of the outer protective sleeve (80) has a second light-transmitting opening (82) that is coaxial with the first light-transmitting opening (23) and located outside the first light-transmitting opening (23).

5. The high-temperature ceramic-encapsulated sootblower leakage detection sensor according to claim 4, characterized in that, The first light-transmitting port (23) has a first annular groove (231) at one end near the second light-transmitting port (82), and the first lens (60) is installed in the first annular groove (231).

6. The high-temperature ceramic-encapsulated sootblower leakage detection sensor according to claim 4, characterized in that, The second light-transmitting opening (82) has a second annular groove (821) at one end away from the first light-transmitting opening (23). A second lens (83) is fixedly installed in the second annular groove (821). A second preset distance is provided between the second lens (83) and the first lens (60).

7. The high-temperature ceramic-encapsulated sootblower leakage detection sensor according to claim 6, characterized in that, Both the first lens (60) and the second lens (83) are sapphire optical lenses.

8. The high-temperature ceramic-encapsulated sootblower leakage detection sensor according to claim 6, characterized in that, It also includes a snap-fit ​​part (90) disposed on the outer wall of the outer protective sleeve (80), the snap-fit ​​part (90) including an integrally formed flat fixing part (91) and an arc-shaped snap-fit ​​part (92). The outer protective sleeve (80) has a slot (84) axially formed on its outer wall. The slot (84) passes through at least one end of the outer protective sleeve (80) and forms an insertion interface (841). One end of the straight fixing part (91) is inserted into the slot (84) through the insertion interface (841). The arc-shaped snap-fit ​​part (92) has a snap-fit ​​interface (921) for snapping with the pipe, and the other end of the straight fixing part (91) is fixedly connected to the arc-shaped snap-fit ​​part (92) on the side away from the snap-fit ​​interface (921).

9. The high-temperature ceramic-encapsulated sootblower leakage detection sensor according to any one of claims 6-8, characterized in that, The connecting part (22) is constructed as an annular flange. The ceramic screw connector (50) is provided with a clearance hole (51) corresponding to the conical lead-out hole (21). The ceramic screw connector (50) includes a connected threaded section (52) and a gripping section (53). The threaded section (52) is threadedly connected to the inner wall of the annular flange. A limiting groove (521) is opened at the end of the threaded section (52) away from the gripping section (53). The conical sealing sleeve (40) abuts against the bottom wall of the limiting groove (521). The gripping section (53) is constructed as a polygonal structure and can abut against the outer end of the connecting part (22).

10. A calibration method for a high-temperature ceramic-encapsulated sootblower leakage detection sensor, used to calibrate the high-temperature ceramic-encapsulated sootblower leakage detection sensor as described in claim 9, characterized in that, Includes the following steps: S100. Build a calibration platform. The calibration platform includes a constant temperature heating furnace, a standard temperature source, a sealed calibration cover, a data acquisition instrument, and a terminal block adapted to the transmission wire (30). The sealed calibration cover has a calibration light-transmitting port that corresponds to the first light-transmitting port (23) and the second light-transmitting port (82) and is arranged coaxially. The calibration light-transmitting port is equipped with a calibration lens that matches the first lens (60) and the second lens (83). S200. Fix the high-temperature ceramic-encapsulated sootblower leakage detection sensor to be calibrated onto the sealed calibration cover, so that the probe (11) of the infrared temperature sensor (10) is aligned with the standard temperature source through the first light-transmitting port (23), the second light-transmitting port (82), and the calibration light-transmitting port, ensuring that the infrared temperature sensor (10) can receive the infrared radiation emitted by the standard temperature source through the first lens (60), the second lens (83), and the calibration lens, and at the same time, connect the transmission wire (30) to the data acquisition instrument through the terminal block; S300. Set the heating parameters of the constant temperature heating furnace, and control the standard temperature source to be stabilized at multiple preset calibration temperature points in sequence. The preset calibration temperature points cover the normal working temperature of the soot blower and the abnormal temperature range of steam leakage. Each preset calibration temperature point is stabilized for a preset duration. S400. The data acquisition instrument acquires the detection temperature data output by the high-temperature ceramic-encapsulated sootblower leakage detection sensor at each preset calibration temperature point, and simultaneously records the standard temperature data of the corresponding preset calibration temperature point, and calculates the deviation value between the detection temperature data and the standard temperature data at each temperature point. S500: Determine whether the deviation value of each temperature point is within the preset allowable deviation range. If all deviation values ​​are within the preset allowable deviation range, the calibration is qualified and the calibration is completed. If there is a deviation value that exceeds the preset allowable deviation range, adjust the detection parameters of the infrared temperature sensor (10) and repeat steps S100 to S500 until all deviation values ​​are within the preset allowable deviation range.

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