High-temperature and high-pressure resistant infrared temperature measuring endoscope device

Abstract

The utility model discloses a kind of infrared temperature measurement endoscopes of high temperature and high pressure resistance, including infrared detector, the computer being connected with infrared detector one end, optical lens being connected with the other end of infrared detector, endoscope shell connecting gas turbine case and optical lens, protective sleeve and cooling device;Optical lens is divided into upper portion and lower portion by its shoulder block A, endoscope shell is the hollow structure for the lower portion of optical lens to pass through with upper and lower ends being open, the upper end surface of endoscope shell is equipped with shoulder block B, middle section lateral wall is equipped with shoulder block C, the utility model device innovatively integrates optical detection, high-pressure seal, active cooling and intelligent feedback, can be in the extreme high temperature and high pressure of heavy gas turbine combustion chamber harsh working condition, realize real-time, accurate two-dimensional measurement to combustion chamber wall temperature through limited optical channel, provide key data support for the performance optimization, condition monitoring and fault early warning of gas turbine.

Description

Technical Field

[0001] This utility model relates to the field of endoscope technology, and more specifically, to an infrared thermometer endoscope device that is resistant to high temperature and high pressure. Background Technology

[0002] Gas turbines are highly efficient energy conversion equipment. With their high efficiency, cleanliness, and safety, they have become core equipment in my country's power generation and drive sectors, providing crucial support for the energy and power industry and economic development. The successful ignition of my country's independently developed 300 MW F-class heavy-duty gas turbine in Lingang, Shanghai, marks a significant breakthrough in this technological field. With the continuous advancement of gas turbine technology, the turbine inlet gas temperature continues to rise. This high-temperature gas places a significant heat load and thermal flow impact on the combustion chamber, as well as causing thermal fatigue and high-temperature creep during low-frequency cycling, leading to various problems such as thermal fatigue cracks, thermal corrosion, high-temperature creep damage, and thermal barrier coating peeling. Against this backdrop, accurately obtaining information about the two-dimensional temperature field inside the combustion chamber is crucial for optimizing gas turbine performance and detecting faults.

[0003] Heavy-duty gas turbines have limited optical channels, so in actual industrial temperature monitoring, the target is usually in a complex, non-transparent, enclosed environment, making direct optical measurement with a camera difficult. To obtain maximum information from the combustion chamber, optical measurement using an endoscope is necessary. The structural design of the endoscope varies depending on the temperature measurement technology used, the measurement point, and the operating conditions. Even though industrial endoscopes have been developed for many years in industries such as chemical and energy, most mass-produced endoscopes are currently limited by their standardized structures, making it difficult to measure the two-dimensional temperature of the combustion chamber walls under harsh high-temperature and high-pressure environments.

[0004] Therefore, to meet the need for two-dimensional measurement of combustion chamber wall temperature in heavy-duty gas turbines with extremely harsh internal environments, it is necessary to design a high-temperature and high-pressure resistant infrared thermometry endoscope device. Utility Model Content

[0005] The purpose of this invention is to design a high-temperature and high-pressure resistant infrared thermometric endoscope device, enabling two-dimensional measurement of the combustion chamber wall temperature of a gas turbine. To achieve the above objective, this invention is implemented through the following technical solution:

[0006] This utility model discloses a high-temperature and high-pressure resistant infrared thermometer endoscope device, comprising: an infrared detector, a computer connected to one end of the infrared detector, an optical lens connected to the other end of the infrared detector, an endoscope housing connecting the gas turbine casing and the optical lens, a protective sleeve, and a cooling device; the optical lens is divided into an upper and lower part by its shoulder block A, the endoscope housing is a hollow structure with openings at both the upper and lower ends for the lower part of the optical lens to pass through, the upper end face of the endoscope housing is provided with a shoulder block B, and the middle side wall is provided with a shoulder block C, the optical lens is fixed to the shoulder block B by the shoulder block A, the endoscope housing is fixed to the gas turbine casing interface by the shoulder block C, the lower end of the protective sleeve is fixed to the shoulder block B to cover and protect the upper part of the optical lens, the shoulder block A, and the infrared detector, and the cooling device is connected to the inner cavity of the protective sleeve and the endoscope housing through an air pipe.

[0007] As a further improvement, the computer described in this utility model is used to receive and quickly process infrared radiation signals from high-temperature walls to obtain a precise two-dimensional distribution of wall temperature. Sealing gaskets are provided between shoulder block A and shoulder block B, and between shoulder block C and the gas turbine casing interface.

[0008] As a further improvement, the present invention provides positioning pins with a diameter of 2-4mm between shoulder block A and shoulder block B, and between shoulder block C and the gas turbine casing interface, to ensure that the endoscope housing, optical lens and heavy-duty gas turbine combustion chamber are coaxially assembled, and that the optical lens does not deviate from the target area to be measured.

[0009] As a further improvement, the endoscope housing of this utility model is a long cylindrical hollow structure made of stainless steel with a wall thickness of 4mm. An optical lens passes through the inside. The front section of the hollow structure inside the endoscope housing has a diameter of 40-45mm, and the rear section has a diameter of 46-51mm. The front section is used to extend into the combustion chamber cavity of a heavy-duty gas turbine. The distance between the inner wall of the rear section of the hollow structure inside the endoscope housing and the optical lens is 1-3mm, forming a cavity for the passage of gas from the cooling device.

[0010] As a further improvement, the optical lens housing of this utility model is made of aluminum with a thickness of 6mm or more.

[0011] As a further improvement, the cooling device of this utility model is supplied with a high-pressure air source and divided into two paths through an air pipe. One path is equipped with a pressure reducing valve and supplies air to the protective sleeve; the other path is equipped with a filter and supplies air to the cooling air inlet on the endoscope housing, so as to ensure the use of clean cooling medium.

[0012] As a further improvement, the high-pressure gas source described in this utility model is equipped with a gas supply pipeline pressure gauge before entering the cooling device for monitoring pressure, and a thermal resistor is connected to the rear section of the endoscope housing for monitoring temperature. The thermal resistor is connected to a computer.

[0013] This innovative device integrates optical detection, high-pressure sealing, active cooling, and intelligent feedback into a single unit. Under the harsh conditions of extreme high temperature and high pressure in the combustion chamber of a heavy-duty gas turbine, it achieves real-time, precise two-dimensional measurement of the combustion chamber wall temperature through a limited optical channel, providing crucial data support for gas turbine performance optimization, condition monitoring, and fault early warning. Specifically, its beneficial effects can be elaborated in detail from the following aspects:

[0014] (1) High measurement accuracy and reliability. A specially designed radiation signal transmission module is used, whose optical lens can efficiently transmit infrared radiation signals of a specific band, ensuring the quality of the original signal. The infrared detector equipped in the radiation signal receiving module is combined with the computer's fast processing algorithm to effectively suppress background radiation interference. It can perform real-time correction and calculation on the two-dimensional temperature original signal, and finally output a high-precision two-dimensional distribution map of wall temperature. The measurement results are accurate and reliable.

[0015] (2) Strong resistance to extreme environments. For the high-temperature and high-pressure environment inside the combustion chamber, ranging from 1200℃ to 1600℃ and from 1.6MPa to 2MPa, the endoscope housing in the cooling and protection fixing module is made of stainless steel at least 4mm thick, and the optical lens housing is made of aluminum at least 6mm thick. Through multi-bolt connections of 6*M12 and 6*M6 and a sealing gasket design, the overall structure's sealing performance and mechanical strength under high pressure are ensured. A high-pressure gas source provides cooling gas at a maximum pressure of 2.5MPa. Combined with the cooling system and filter, this ensures the cooling gas is low-temperature and clean, forming an effective cooling and protective gas film around the optical lens. This prevents lens damage due to high temperatures and avoids contamination by combustion products.

[0016] (3) Good assembly accuracy and stability. Two to four positioning pins are designed on the endoscope housing, optical lens and heavy gas turbine casing interface to ensure coaxial assembly between modules, avoid optical path offset, ensure accurate coverage of the target measurement area, and improve measurement repeatability and device installation stability.

[0017] (4) High cooling efficiency and intelligent and controllable operation. The measurement module includes a pressure gauge and a Pt100 thermal resistor. The Pt100 thermal resistor is connected to a computer and can monitor the cooling gas pressure and optical lens temperature in real time. Based on the temperature feedback signal, the cooling gas supply pressure can be dynamically adjusted to minimize cooling gas consumption and reduce interference with the flow field inside the combustion chamber while ensuring effective cooling of the lens. This achieves energy-saving and low-disturbance operation.

[0018] (5) The structure is compact, highly integrated and easy to implement. The endoscope housing adopts a long cylindrical single-layer cooling structure with a thin front section and a thick rear section, which not only meets the space restriction of extending into the combustion chamber, but also ensures that the internal cooling air passage is unobstructed. The overall device has a compact structure, which is convenient for installation and maintenance in industrial sites. Moreover, the modules are connected by standardized interfaces (such as positioning pins, bolts and sealing gaskets), which makes assembly and disassembly convenient and facilitates later maintenance and component replacement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the high-temperature and high-pressure resistant infrared thermometer endoscope device in the embodiment of this utility model.

[0020] 1 is an infrared detector, 2 is an optical lens, 3 is an endoscope housing, 4 is a gas supply pipeline pressure gauge, 5 is a high-temperature wall of the combustion chamber of a heavy-duty gas turbine, 101 is a protective sleeve, 102 is a computer that communicates with the infrared detector, 201 is a fixing bolt, 202 is a sealing gasket, 301 is a cooling gas inlet, 304 is a high-pressure gas source, 305 is a cooling device, 306 is a filter, 307 is a pressure reducing valve, 308 is a gas pipe, 309 is a temperature measuring point interface, 401 is a thermal resistor, 501 is a gas turbine casing interface, 502 is a combustion chamber, 6 is a shoulder block A, 7 is a shoulder block B, and 8 is a shoulder block C. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described below in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments without creative effort are within the scope of protection of this utility model.

[0022] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "comprising" or "including," and similar terms used in this invention, mean that the element or object preceding the term encompasses the elements or objects listed following the term and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] This utility model discloses a high-temperature and high-pressure resistant infrared thermometer endoscope device, comprising: an infrared detector 1, a computer 102 connected to one end of the infrared detector 1, an optical lens 2 connected to the other end of the infrared detector 1, an endoscope housing 3 connecting the gas turbine casing and the optical lens 2, a protective sleeve 101, and a cooling device 305; the optical lens 2 is divided into an upper part and a lower part by its shoulder block A6, and the endoscope housing 3 is a hollow structure with openings at both the upper and lower ends for the lower part of the optical lens 2 to pass through. The upper end face of the endoscope housing 3 is provided with a shoulder block B7 and the middle side wall is provided with a shoulder block C8. The optical lens 2 is fixed to the shoulder block B7 by the shoulder block A6. The endoscope housing 3 is fixed to the gas turbine casing interface 501 by the shoulder block C8. The lower end of the protective sleeve 101 is fixed to the shoulder block B7 to cover and protect the upper part of the optical lens 2, the shoulder block A6 and the infrared detector 1. The cooling device 305 is connected to the inner cavity of the protective sleeve 101 and the endoscope housing 3 through the air pipe 308.

[0024] Infrared detector 1 receives high-temperature radiation of a specific wavelength from the combustion chamber wall and forms a two-dimensional image, serving as the raw signal for temperature measurement. Protective sleeve 101 isolates the detector from the industrial environment, providing stable operating conditions, and includes an opening for cooling gas purging and data cable transmission for gas exhaust and wiring. Computer 102 receives and rapidly processes the raw two-dimensional temperature signal from the detector, calculating a precise two-dimensional distribution of the wall temperature using algorithms.

[0025] Computer 102 is used to receive and rapidly process infrared radiation signals from the high-temperature wall surface to obtain a precise two-dimensional distribution of the wall surface temperature. Sealing gaskets 202 are provided between shoulder blocks A6 and B7, and between shoulder block C8 and the gas turbine casing interface 501. Positioning pins with a diameter of 2-4 are provided between shoulder blocks A6 and B7, and between shoulder block C8 and the gas turbine casing interface 501, to ensure coaxial assembly of the endoscope housing 3, optical lens 2, and heavy-duty gas turbine combustion chamber, and to prevent misalignment of the optical lens 2 with the target area to be measured. Shoulder blocks A6 and B7, and shoulder block C8 and the gas turbine casing interface 501 are connected and fixed by fixing bolts 201. The endoscope housing 3 is a long, hollow cylindrical structure made of 4mm thick stainless steel. The optical lens 2 passes through its interior. The front section of the hollow structure inside the endoscope housing 3 has a diameter of 40-45mm, and the rear section has a diameter of 46-51mm, allowing the front section to extend into the combustion chamber of a heavy-duty gas turbine. The distance between the inner wall of the rear section of the hollow structure and the optical lens 2 is 1-3mm, forming a cavity for the passage of gas from the cooling device 305. The housing of the optical lens 2 is made of aluminum with a thickness of 6mm or more.

[0026] The cooling device 305 is supplied with high-pressure air from a source 304, and the air is split into two paths via a pipe 308. One path is equipped with a pressure reducing valve 307, which leads to the protective sleeve 101; the other path is equipped with a filter 306, which leads to the cooling air inlet 301 on the endoscope housing 3, to ensure the use of clean cooling fluid. Before the high-pressure air source 304 enters the cooling device 305, a supply pipe 308 and a pressure gauge 4 are installed to monitor the pressure. A thermal resistor 401 is connected to the temperature measuring point interface 309 at the rear of the endoscope housing 3 to monitor the temperature.

[0027] Optical lens 2 efficiently transmits infrared radiation energy signals from the high-temperature, high-pressure combustion environment to infrared detector 1, and withstands the high pressure from the surrounding cooling gas. Optical lens 2 is used to efficiently transmit infrared radiation signals and cover a large area of ​​the wall surface.

[0028] Cooling device 305 is used to provide low-temperature cooling gas.

[0029] The air supply pipe has 308 pressure gauges and 4 thermal resistors to monitor pressure and temperature and provide feedback signals. It is also used to monitor the cooling air supply pressure to facilitate adjustment of the cooling air intake and to monitor the cooling effect of the cooling air on the radiation signal optical transmission module.

[0030] The heavy-duty gas turbine combustion chamber cavity includes a high-temperature wall surface 5, a casing interface 501, and a combustion chamber 502, providing a combustion environment and an interface for endoscopic device assembly.

[0031] The above technical solution proposes a high-temperature and high-pressure resistant infrared thermometric endoscope device, which can realize two-dimensional wall temperature measurement of the combustion chamber of a heavy-duty gas turbine. In order to avoid damage to the endoscope device caused by high temperature and contamination of the optical lens 2 by the products inside the combustion chamber, cooling gas is used to cool the endoscope housing 3 and the optical lens 2.

[0032] To avoid damage to the endoscope device from high pressure, optionally, in one embodiment, the endoscope housing 3 is made of stainless steel with a thickness of at least 4 mm, the optical lens 2 housing is made of aluminum with a thickness of at least 6 mm, and the interface 501 between the endoscope housing 3 and the heavy-duty gas turbine casing is made of 6* The endoscope housing 3 and the optical lens 2 are connected by bolts using a 6* bolt method. Bolted connection.

[0033] To protect the optical lens 2, an endoscope housing 3 is used to isolate external combustion gases. Cooling gas is directly introduced into the combustion chamber of the heavy-duty gas turbine, forming a compressed air-isolated gas film around the optical lens 2 to ensure that the optical lens 2 is within the normal operating temperature range. At the same time, the cooling gas bypasses the front end of the optical lens 2 to form a protective gas film to prevent lens contamination.

[0034] To ensure the cooling and protection effect of the cooling gas, optionally, in one embodiment, the high-pressure gas source 304 can provide cooling gas with a pressure of up to 2.5 MPa, and the cooling system can cool the high-pressure cooling gas to ensure that the temperature of the cooling gas entering the endoscope housing 3 is below 25°C and the flow rate is greater than 0.11 kg / s. The filter 306 filters the cooling gas to ensure the purity of the cooling gas itself.

[0035] To ensure the long-term stable operation of the infrared detector 1, optionally, in one embodiment, a pressure reducing valve 307 is used to reduce the pressure of the cooling gas provided by the high-pressure gas source 304, and the cooling gas is introduced into the protective sleeve 101 through the gas pipe 308 to cool the infrared detector 1.

[0036] To achieve the desired cooling effect of the cooling gas on the optical lens 2, in one embodiment, four Pt100 thermal resistors 401 are used to measure the temperature at four different points along the axial direction of the optical lens 2. Based on the temperature feedback information of the optical lens 2, the supply pressure of the cooling gas is dynamically adjusted to reduce the flow rate of the cooling gas into the combustion chamber of the heavy-duty gas turbine while ensuring the cooling effect on the optical lens 2, thereby reducing the impact on the internal flow field of the combustion chamber of the heavy-duty gas turbine. At the same time, a pressure gauge is used to monitor the supply pressure of the cooling gas.

[0037] To quickly and accurately obtain the two-dimensional temperature of the combustion chamber wall, a fast processing algorithm software module is optionally deployed on the computer 102, which is connected to the detector module. This effectively eliminates the interference of high-temperature background radiation on the measurement accuracy of the two-dimensional temperature of the wall, and provides a variety of measurement data results. It can also provide real-time temperature threshold alarm.

[0038] To ensure a tight fit between the temperature-measuring endoscope and the heavy-duty gas turbine casing interface 501, positioning pins are used to fix the central axis of the optical lens 2 and the endoscope housing 3 to the same line. At the same time, positioning pins are used to fix the central axis of the endoscope housing 3 and the central axis of the heavy-duty gas turbine casing interface 501 to the same line, which can ensure that the field of view covers the expected observation wall inside the combustion chamber 502 of the heavy-duty gas turbine.

[0039] To ensure the cooling effect of the cooling gas on the optical lens 2, considering that the air temperature around the gas turbine may reach 40°C in the summer in industrial environments, a cooling system 305 is used to cool the cooling gas provided by the high-pressure gas source 304 to ensure that the temperature of the cooling gas does not exceed 25°C when it reaches the inlet of the endoscope housing 3.

[0040] To reduce the impact of cooling gas on the internal flow field of the gas turbine combustion chamber, the intake flow rate of cooling gas is adjusted by combining the readings of pressure gauge 4 and thermal resistor 401 on the gas supply pipe 308. Under the premise of ensuring that the optical lens 2 is within the normal operating temperature range, the supply pressure of high-pressure gas source 304 is reduced to reduce the impact on the internal flow of the combustion chamber.

[0041] To ensure the long-term use of the infrared detector 1, cooling air is introduced into the protective sleeve 101 through the air pipe 308 and the pressure reducing valve 307. This can remove the heat generated by the infrared detector 1 during long-term operation from the protective sleeve 101, so as to keep the infrared detector 11 within the normal operating temperature range for a long time.

[0042] The high-temperature wall 5 of the combustion chamber of a heavy-duty gas turbine emits infrared radiation energy. An optical mirror 2 receives the infrared radiation energy from the high-temperature wall of the combustion chamber in the target area at a certain angle and transmits it to an infrared detector 1. The infrared detector 1 responds to the infrared radiation energy and outputs an electrical signal of corresponding magnitude in a two-dimensional matrix to a computer 102 that is connected to the infrared detector 1 to form an image. This is the original temperature signal of the infrared radiation energy emitted from the high-temperature wall 5 of the combustion chamber of the heavy-duty gas turbine. After temperature correction processing by a fast temperature measurement processing algorithm built in advance in the computer 102 that is connected to the infrared detector 1, the accurate two-dimensional temperature distribution of the corresponding area of ​​the high-temperature wall 5 of the combustion chamber of the heavy-duty gas turbine can be obtained directly.

[0043] The internal flame temperature of the combustion chamber of the heavy-duty gas turbine is 1200℃~1600℃, and the internal pressure is 1.6MPa~2MPa. To avoid damage to the optical lens 22 due to high pressure, the outer shell of the optical lens 2 is made of aluminum with a thickness of at least 6mm. To prevent damage to the temperature measuring endoscope device caused by the high temperature environment and interference from combustion products such as water vapor and carbon black on the signal transmission of the optical lens 2, a cooling protection fixing module is designed. The optical lens 2 is built into the middle of the endoscope shell 3, and cooling gas is provided by the high-pressure gas source 304. The cooling gas is transmitted to the filter 306 through the gas pipe 308 and then reaches the cooling gas inlet 301 of the endoscope shell 3. First, a flowing cooling gas film is formed around the optical lens 2 to cool its temperature. Then, it flows through the head of the optical lens 2 to form a protective gas film that isolates it from contamination, while also isolating it from external hot air and combustion products and cooling the head of the optical lens 2. Finally, the cooling gas is directly introduced into the combustion chamber. In addition, cooling gas is introduced into the protective sleeve 101101 through another pipe of gas pipe 308307 via pressure reducing valve 307, which increases the cooling and heat dissipation of infrared detector 1 to maintain the long-term use of infrared detector 1.

[0044] The measurement of two-dimensional temperature of the combustion chamber wall of a gas turbine using the aforementioned high-temperature and high-pressure resistant infrared thermometric endoscope includes the following steps:

[0045] (1) Complete the fixing and sealing of the radiation signal transmission module and the endoscope housing 3;

[0046] (2) Fix and seal the endoscope housing 3 to the gas turbine casing interface 501;

[0047] (3) Open the high-pressure gas source 304 and slowly increase the gas pressure according to the pressure gauge reading of the gas pipe 308 to ensure that the cooling gas supply pressure is slightly greater than the internal pressurization of the gas turbine.

[0048] (4) Run computer 102 to observe the two-dimensional distribution of the internal wall temperature of the combustion chamber;

[0049] (5) During the process of the gas turbine running to normal operating conditions, pay attention to the reading of the thermal resistor 401 and dynamically adjust the cooling gas supply pressure;

[0050] (6) After the gas turbine stops running, maintain the current cooling gas supply. When the internal pressure of the gas turbine returns to atmospheric pressure, reduce the gas supply pressure, retract the temperature measuring endoscope device, and stop the gas supply.

[0051] The device structure of this embodiment can withstand the high temperature and high pressure inside the gas turbine, realize two-dimensional temperature measurement of the internal wall temperature of the combustion chamber, and dynamically monitor the changes in the temperature field of the combustion chamber wall.

[0052] Software processing:

[0053] For radiation thermometry scenarios affected by background reflection, a radiation transfer model for detector reception is established:

[0054] ;

[0055] in, This represents the total radiation intensity received by the detector; This represents the emissivity of the surface of the target object. That is, reflectivity; Indicates temperature as The blackbody at the detector response wavelength The radiation intensity below, This indicates the temperature of the target object itself. Indicates the angular coefficient of the target object relative to the background; Indicates the background apparent emissivity. This represents the actual background temperature; n represents the number of blocks into which the overall background environment is divided according to temperature.

[0056] Background radiation Equivalent to the radiation of a blackbody at a certain temperature, the simplified formula is:

[0057]

[0058] in, Represents the equivalent background radiation source temperature; equivalent background radiation source temperature The equivalent background radiation source temperature was measured and calibrated through calibration experiments; for various operating conditions, the equivalent background radiation source temperature was determined. And parameters that can characterize the operating conditions of the temperature measurement scenario ( , ...) Correlation, and perform linear regression fitting:

[0059]

[0060] in, , Indicates the corresponding parameter , The regression coefficients; by inputting the measured equivalent background radiation source temperature into the processing software, the accurate two-dimensional distribution of wall temperature can be quickly obtained.

[0061] The above description of the embodiments is provided to enable those skilled in the art to understand and apply the present invention. Those skilled in the art can readily make various modifications to the above embodiments and apply the general principles described herein to other embodiments without creative effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made to the present invention by those skilled in the art based on the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. A high-temperature and high-pressure resistant infrared thermometric endoscope device, characterized in that, include: The system comprises an infrared detector, a computer connected to one end of the infrared detector, an optical lens connected to the other end of the infrared detector, an endoscope housing connecting the gas turbine casing and the optical lens, a protective sleeve, and a cooling device. The optical lens is divided into an upper and lower part by a shoulder block A. The endoscope housing is a hollow structure with openings at both ends for the lower part of the optical lens to pass through. The upper end face of the endoscope housing has a shoulder block B, and the middle side wall has a shoulder block C. The optical lens is fixed to the shoulder block B by the shoulder block A. The endoscope housing is fixed to the gas turbine casing interface by the shoulder block C. The lower end of the protective sleeve is fixed to the shoulder block B to cover and protect the upper part of the optical lens, the shoulder block A, and the infrared detector. The cooling device is connected to the inner cavity of the protective sleeve and the endoscope housing through an air pipe.

2. The high-temperature and high-pressure resistant infrared thermometer endoscope device according to claim 1, characterized in that, The computer is used to receive and quickly process infrared radiation signals from the high-temperature wall surface to obtain a precise two-dimensional distribution of the wall surface temperature. Sealing gaskets are provided between the shoulder block A and the shoulder block B, and between the shoulder block C and the gas turbine casing interface.

3. The high-temperature and high-pressure resistant infrared thermometer endoscope device according to claim 1 or 2, characterized in that, The shoulder block A and shoulder block B, and the shoulder block C and the gas turbine casing interface are provided with positioning pins with a diameter of 2-4mm to ensure that the endoscope housing, optical lens and heavy-duty gas turbine combustion chamber are coaxially assembled and that the optical lens and the target area to be measured are not offset.

4. The high-temperature and high-pressure resistant infrared thermometer endoscope device according to claim 3, characterized in that, The endoscope housing is a long, hollow cylindrical structure made of stainless steel with a wall thickness of 4mm. The optical lens passes through the interior. The front section of the hollow structure inside the endoscope housing has a diameter of 40-45mm, and the rear section has a diameter of 46-51mm. The front section is used to extend into the combustion chamber of the heavy-duty gas turbine. The distance between the inner wall of the rear section of the hollow structure inside the endoscope housing and the optical lens is 1-3mm, forming a cavity for the passage of gas from the cooling device.

5. The high-temperature and high-pressure resistant infrared thermometer endoscope device according to claim 4, characterized in that, The optical lens housing is made of aluminum with a thickness of 6 mm or more.

6. The high-temperature and high-pressure resistant infrared thermometer endoscope device according to claim 5, characterized in that, The cooling device is supplied with a high-pressure gas source and divided into two paths through a gas pipe. One path is equipped with a pressure reducing valve and supplies gas to the protective sleeve; the other path is equipped with a filter and supplies gas to the cooling gas inlet on the endoscope housing to ensure that clean cooling medium is used.

7. The high-temperature and high-pressure resistant infrared thermometric endoscope device according to claim 1, 2, 4, 5, or 6, characterized in that, Before the high-pressure gas source enters the cooling device, a pressure gauge is installed on the gas supply pipeline to monitor the pressure. A thermal resistor is connected to the rear section of the endoscope housing to monitor the temperature. The thermal resistor is connected to a computer.

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