High-temperature-resistant endoscope

Abstract

The utility model discloses a high-temperature-resistant endoscope. The high-temperature-resistant endoscope comprises an inner tube, an outer tube and a camera shooting assembly. An endoscopic cavity is formed in the inner tube, an observation window is arranged at one axial end part of the inner tube, and an optical lens is fixed on the observation window; the camera shooting assembly comprises a camera, and the camera is arranged in the endoscopic cavity and located on the side, provided with the observation window, of the inner tube. The outer pipe is arranged on the periphery of the inner pipe in a sleeving mode, the inner pipe is detachably connected with the outer pipe, the outer pipe is provided with a cooling cavity used for containing cooling liquid, and the cooling cavity is arranged around the peripheral side of the inner pipe. The camera capable of imaging is directly placed in the endoscopic cavity, so that the process of optically reflecting an image by a lens is omitted, an imaging light path is greatly shortened, and the imaging quality is effectively improved. The liquid cooling structure is arranged on the peripheral side of the endoscopic cavity, the temperature of the endoscopic cavity can be reduced, the heat resistance of the camera in the endoscopic cavity is improved, and normal work of the camera is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to a high-temperature resistant endoscope. Background Art

[0002] Entrained-flow gasifiers are important industrial production equipment that convert solid fuels (such as coal, petroleum coke, or biomass) into syngas under high temperature and pressure for use in power generation, chemical production, or liquid fuel synthesis. Monitoring is essential to ensuring efficient and stable gasifier operation. High-temperature endoscopes enable real-time observation of combustion conditions within the gasifier, monitoring temperature distribution, airflow, and fuel reaction. High-temperature endoscopes can operate under extreme operating conditions. They transmit real-time images of the furnace interior to a monitoring room via an optical system, allowing operators to observe furnace operation from a safe distance. These images not only reveal the flame morphology of the combustion zone but also, through specialized filters and sensors, reveal key parameters such as temperature distribution and substance concentration. In practical applications, high-temperature endoscopes can help operators promptly detect and address abnormalities within the gasifier. For example, when problems such as incomplete combustion, excessively high or low temperatures, or fuel accumulation occur, operators can use real-time image and data analysis to quickly adjust operating parameters such as fuel supply, airflow rate, and furnace temperature to ensure a stable and efficient gasification process. Furthermore, high-temperature endoscopes can record and store monitoring data for subsequent analysis and optimization. By analyzing historical data, technicians can better understand the gasifier's operating patterns, identify potential problems, and perform preventive maintenance and process improvements, thereby further improving gasification efficiency and system reliability.

[0003] In the prior art, the interior of the endoscope optically reflects images through multiple lenses and ultimately transmits them to an image processor located outside the endoscope for imaging. However, this method has a poor impact on imaging quality due to the long optical path of the endoscope imaging. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a high temperature resistant endoscope in order to overcome the defect in the prior art that the imaging optical path of the endoscope is long and the imaging quality is reduced.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A high temperature resistant endoscope, comprising an inner tube, an outer tube and a camera assembly;

[0007] The interior of the inner tube forms an endoscope cavity, and an observation window is provided at one axial end of the inner tube, and an optical lens is fixed to the observation window; the camera assembly includes a camera, which is provided in the endoscope cavity and located on the side of the inner tube where the observation window is provided;

[0008] The outer tube is sleeved on the outer circumference of the inner tube. The inner tube and the outer tube are detachably connected. The outer tube has a cooling cavity for accommodating coolant. The cooling cavity is arranged around the outer circumference of the inner tube.

[0009] In this solution, the imaging camera is placed directly within the endoscope cavity, eliminating the need for optical reflections from lenses. This significantly shortens the imaging optical path and effectively improves image quality. A liquid cooling structure is installed on the outer periphery of the endoscope cavity to reduce the cavity temperature, improve the heat resistance of the camera inside the cavity, and ensure its normal operation.

[0010] Preferably, the observation window includes a first observation window unit and a second observation window unit in sequence along the axial direction of the inner tube, the first observation window unit is connected to the inner tube, the first observation window unit and the second observation window unit are detachably connected, and the optical lens is clamped between the first observation window unit and the second observation window unit.

[0011] In this solution, the aforementioned configuration allows the optical lens in the observation window to be interchangeable. This allows for different optical lenses to be used for monitoring the furnace interior, thereby collecting different monitoring data and achieving more accurate monitoring results. Furthermore, the optical lens can be replaced with filters with different central wavelengths to capture spectra of different wavelengths within the furnace. Further processing can yield information such as temperature and the excited state of free radicals, enabling further monitoring of real-time images of the furnace interior, reaction conditions, and substance generation.

[0012] Preferably, the side surface of the first observation window unit facing the second observation window unit has a first accommodating groove recessed into the interior of the first observation window unit, and the side surface of the second observation window unit facing the first observation window unit has a second accommodating groove recessed into the interior of the second observation window unit, the first accommodating groove and the second accommodating groove constitute an accommodating space for the optical lens, and the optical lens is clamped in the accommodating space.

[0013] In this solution, the accommodating space can realize the rapid positioning of the optical lens on the one hand, and on the other hand, it can also limit the movement of the optical lens relative to the observation window to ensure the monitoring effect.

[0014] Preferably, a first sealing gasket is provided between the optical lens and the bottom of the first accommodating groove; and / or a second sealing gasket is provided between the optical lens and the bottom of the second accommodating groove.

[0015] In this solution, the sealing gasket can, on the one hand, prevent the optical lens from directly contacting the observation window and reduce the wear of the optical lens; on the other hand, it can press the optical lens between the first observation window unit and the second observation window unit to prevent the optical lens from moving.

[0016] Preferably, the outer tube includes a first outer tube, a second outer tube and a third outer tube; the first outer tube is sleeved on the outer circumference of the inner tube; the second outer tube is sleeved on the outer circumference of the first outer tube, and a first cooling cavity is formed between the second outer tube and the first outer tube; the third outer tube is sleeved on the outer circumference of the second outer tube, and a second cooling cavity is formed between the third outer tube and the second outer tube, and the first cooling cavity and the second cooling cavity are connected.

[0017] In this solution, the double-layer cooling cavity can achieve a better cooling effect, reduce the temperature of the endoscope cavity, improve the heat resistance of the camera in the endoscope cavity, and ensure the normal operation of the camera.

[0018] Preferably, the high-temperature resistant endoscope also includes a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe are located on the same axial side of the inner tube; the liquid outlet end of the liquid inlet pipe is connected to the second outer tube, and the liquid outlet of the liquid inlet pipe is connected to the first cooling chamber; the liquid inlet end of the liquid outlet pipe is connected to the third outer tube, and the liquid inlet of the liquid outlet pipe is connected to the second cooling chamber.

[0019] In this solution, the coolant first flows through the first cooling chamber, which is closer to the endoscope cavity. This effectively reduces and stabilizes the temperature of the endoscope cavity, improving the heat resistance of the camera inside the cavity and ensuring its proper operation. The coolant then flows to the second cooling chamber, which is farther from the endoscope cavity, where the temperature is less elevated and the coolant does not vaporize, effectively cooling the outer tube.

[0020] Preferably, the first cooling cavity and the second cooling cavity are both spiral, a spiral first water guide line is provided in the first cooling cavity, and a spiral second water guide line is provided in the second cooling cavity, the axes of the first water guide line and the second water guide line are parallel to the axis of the inner tube, and the spiral directions of the first water guide line and the second water guide line are opposite.

[0021] In this solution, the spiral-shaped first and second water guides enhance the turbulence of the coolant and reduce damage and leakage caused by thermal stress. The coolant flows in opposite directions within the first and second cooling cavities, intensifying the turbulent layer of the coolant. This reduces the thickness of the laminar inner layer of the heat transfer boundary layer, improving the convective heat transfer coefficient and, in turn, reducing the thermal resistance of convective heat transfer.

[0022] Preferably, the pitch of the first water guide line is 4-7 cm; and / or the pitch of the second water guide line is 4-7 cm.

[0023] In this solution, the pitch of the water guide line is controlled within a certain range, which can ensure both the flow rate of the coolant and the ability to disturb the coolant.

[0024] Preferably, the high-temperature resistant endoscope further comprises an air inlet pipe, the air inlet pipe being arranged on a side of the inner tube away from the observation window in its axial direction, and the air inlet pipe being located on the outside of the outer tube; the air outlet end of the air inlet pipe being connected to the inner tube, and the air outlet of the air inlet pipe being communicated with the endoscope cavity;

[0025] A gas channel is provided on the observation window, one end of the gas channel is communicated with the endoscope cavity, and the other end of the gas channel passes through the observation window and is away from one end of the inner tube in the axial direction of the inner tube.

[0026] In this solution, the above-mentioned setting is used to greatly reduce the impact of fly ash in the furnace on the optical lens.

[0027] Preferably, the gas channel includes a first gas channel and a second gas channel, and the first gas channel and the second gas channel both include an outlet section located on the side of the optical lens away from the air inlet pipe in the axial direction of the inner tube, and the outlet of the outlet section of the first gas channel is oriented in the direction away from the optical lens in the axial direction of the inner tube, and the outlet of the outlet section of the second gas channel is oriented in the direction close to the optical lens in the axial direction of the inner tube.

[0028] In this solution, the first gas channel is used to prevent fly ash in the furnace from adhering to the observation window, and the second gas channel is used to blow away the dust that has already adhered to the observation window to improve the clarity of the optical lens and enhance the imaging effect.

[0029] Preferably, the angle between the axial end face of the optical lens and the axis of the air outlet of the air outlet section of the first gas channel is 60°~75°; the angle between the axial end face of the optical lens and the axis of the air outlet of the air outlet section of the second gas channel is 5°~20°.

[0030] Preferably, a flange plate is provided on the side of the inner tube away from the observation window, the flange plate is sleeved on the outer circumference of the inner tube and is located outside the outer tube, and the inner tube is detachably connected to the outer tube through the flange plate.

[0031] In this solution, the above arrangement facilitates the connection between the inner tube and the outer tube.

[0032] Preferably, the high temperature resistant endoscope further comprises an axial adjustment member, which is sleeved on the outer periphery of the inner tube and clamped between the flange plate and the outer tube in the axial direction of the inner tube.

[0033] In this solution, the above-mentioned setting makes the axial position of the inner tube relative to the outer tube adjustable. Since the inner tube is rotatable relative to the outer tube, the position of the observation window can be flexibly adjusted, making it convenient to select a suitable shooting position and angle, thereby improving the monitoring effect.

[0034] Preferably, the high temperature resistant endoscope meets one or more of the following conditions:

[0035] a. The camera is a monitoring camera or a spectral camera;

[0036] b. The material of the inner tube is zirconium or copper;

[0037] c. The material of the outer tube is cobalt alloy or nickel-based alloy;

[0038] d. The material of the observation window is cobalt alloy or nickel-based alloy.

[0039] In this solution, the monitoring camera and spectral camera are compact and easily placed in the endoscope cavity. Zirconium, copper, cobalt alloy, and nickel-based alloy materials are high-temperature resistant and have a long service life.

[0040] The positive benefits of this invention lie in placing the imaging camera directly within the endoscope cavity, eliminating the need for optical reflection of the image through a lens, significantly shortening the imaging optical path and effectively improving image quality. A liquid cooling structure is provided on the outer periphery of the endoscope cavity, reducing the cavity temperature and improving the heat resistance of the camera within the cavity, ensuring proper operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 Schematic diagram of the internal structure of an endoscope according to an embodiment of the present invention.

[0042] Figure 2 This is a schematic diagram of the internal structure of an observation window according to an embodiment of the present invention.

[0043] Description of reference numerals:

[0044] Inner tube 1

[0045] Flange plate 2

[0046] First connecting piece 3

[0047] Liquid outlet pipe 4

[0048] Liquid inlet 41 of the liquid outlet pipe

[0049] First outer tube 5

[0050] Second outer tube 6

[0051] Third outer tube 7

[0052] First waterline 81

[0053] Second water guide line 82

[0054] Observation window 100

[0055] First observation window unit 9

[0056] Second observation window unit 10

[0057] First gas channel 11

[0058] Gas outlet section 111 of the first gas channel

[0059] Second connecting member 12

[0060] Second gas channel 13

[0061] The gas outlet section 131 of the second gas channel

[0062] Optical lenses 14

[0063] Second cooling chamber 15

[0064] First cooling chamber 16

[0065] Endoscopic cavity 17

[0066] Liquid inlet pipe 18

[0067] Liquid outlet 181 of the liquid inlet pipe

[0068] Air inlet pipe 19

[0069] Air outlet of the air inlet pipe 191

[0070] Signal hole 20

[0071] First receiving groove 21

[0072] Second receiving groove 22

[0073] Close plate 23 DETAILED DESCRIPTION

[0074] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0075] like Figure 1 and Figure 2 As shown, this embodiment discloses a high-temperature resistant endoscope, including an inner tube 1, an outer tube and a camera assembly.

[0076] like Figure 1 and Figure 2 As shown, one of the axial ends of the inner tube 1 ( Figure 1 The lower end of the inner tube 1) is provided with an observation window 100, and the other axial end ( Figure 1The upper end of the inner tube 1 is provided with a sealing plate 23, and the inner peripheral wall of the inner tube 1, the observation window 100 and the sealing plate 23 form an endoscope cavity 17. The observation window 100 is fixed with an optical lens 14 for observing the situation inside the furnace.

[0077] In this embodiment, the inner tube 1 is made of zirconium, and the observation window 100 is made of a cobalt alloy (e.g., G-CoCr28 alloy). Zirconium and cobalt exhibit high temperature resistance, high strength, excellent wear resistance, and long service life. In alternative embodiments, the inner tube 1 and observation window 100 may also be made of other materials that meet the aforementioned requirements, such as zirconium, copper, steel, cobalt, nickel, etc.

[0078] The imaging assembly in this embodiment includes a camera and a data transmission cable. The camera is located within the endoscope cavity 17, on the side of the inner tube 1 where the observation window 100 is located. The camera directly captures images captured through the optical lens 14 of the observation window 100, eliminating the traditional process of relying on optical reflection from the lens. This significantly shortens the imaging optical path, effectively improving image quality and clarity. One end of the data transmission cable is connected to the camera, while the other end extends through the signal hole 20 in the sealing plate 23 and connects to a computer or other device to transmit images captured by the camera.

[0079] The camera in this embodiment is a small camera such as a monitoring camera or a spectral camera, which is convenient to be placed in the endoscope cavity 17 .

[0080] like Figure 1 As shown, the outer tube is sleeved around the outer periphery of the inner tube 1. The outer tube has a cooling cavity for containing coolant, which is arranged around the outer periphery of the inner tube 1. The coolant in the cooling cavity can reduce the temperature of the endoscope cavity 17, improve the heat resistance of the camera in the endoscope cavity 17, and ensure the normal operation of the camera.

[0081] In this embodiment, the outer tube is made of a cobalt alloy (e.g., G-CoCr28 alloy). Cobalt is characterized by high temperature resistance, high strength, good wear resistance, and long service life. In alternative embodiments, the outer tube may be made of other materials that meet the aforementioned requirements, such as zirconium, copper, steel, nickel, etc.

[0082] Specifically, if Figure 1 As shown, the outer tube includes a first outer tube 5, a second outer tube 6, and a third outer tube 7. The inner tube 1, the first outer tube 5, the second outer tube 6, and the third outer tube 7 are coaxially arranged. The first outer tube 5 is sleeved on the outer circumference of the inner tube 1, and the inner circumference of the first outer tube 5 abuts the outer circumference of the inner tube 1. The first outer tube 5 is used to fix the position of the inner tube 1 and prevent the inner tube 1 from shifting. The second outer tube 6 is sleeved on the outer circumference of the first outer tube 5, and a first cooling chamber 16 is formed between the second outer tube 6 and the first outer tube 5. The third outer tube 7 is sleeved on the outer circumference of the second outer tube 6, and a second cooling chamber 15 is formed between the third outer tube 7 and the second outer tube 6.

[0083] In this embodiment, the first outer tube 5, the second outer tube 6 and the third outer tube 7 are made of the same material. In other alternative embodiments, the first outer tube 5, the second outer tube 6 and the third outer tube 7 can also be made of different materials according to needs.

[0084] like Figure 1 As shown, the first outer tube 5, the second outer tube 6 and the third outer tube 7 are at one end of the inner tube 1 away from the observation window 100 in the axial direction ( Figure 1 The upper end of the inner tube 1 is flush with the upper end of the inner tube 1 and is connected by the first connecting member 3. The upper end of the inner tube 1 extends above the first connecting member 3. In this embodiment, the first connecting member 3 is an annular plate. The first connecting member 3 is sleeved on the outer circumference of the inner tube 1. The first connecting member 3 is fixed to the upper ends of the first outer tube 5, the second outer tube 6, and the third outer tube 7, and blocks the upper ends of the first cooling cavity 16 and the second cooling cavity 15. The lower ends of the first cooling cavity 16 and the second cooling cavity 15 are connected. The first outer tube 5 and the third outer tube 7 are located at one end of the inner tube 1 (closest to the observation window 100) in the axial direction. Figure 1 The second outer tube 6 and the second connecting member 12 are flush with each other and connected by a second connecting member 12. A gap is formed between the second outer tube 6 and the second connecting member 12 in the axial direction of the inner tube 1, which enables communication between the first cooling cavity 16 and the second cooling cavity 15. The double-layered cooling cavity can achieve a better cooling effect, reduce the temperature of the endoscope cavity 17, improve the heat resistance of the camera in the endoscope cavity 17, and ensure the normal operation of the camera.

[0085] Further, if Figure 1 As shown, the high-temperature resistant endoscope further includes a liquid inlet pipe 18 and a liquid outlet pipe 4, which are located on the same axial side of the inner tube 1, specifically on the side of the inner tube 1 that is axially away from the observation window 100. The liquid outlet end of the liquid inlet pipe 18 passes through the third outer tube 7 and is connected to the second outer tube 6, and the liquid outlet 181 of the liquid inlet pipe is in communication with the first cooling chamber 16. The liquid inlet end of the liquid outlet pipe 4 is connected to the third outer tube 7, and the liquid inlet 41 of the liquid outlet pipe is in communication with the second cooling chamber 15. External coolant can flow into the first cooling chamber 16 through the liquid inlet pipe 18 and then be discharged from the second cooling chamber 15 through the liquid outlet pipe 4, thereby ensuring that the coolant with low temperature continuously flows into the outer tube and the heated coolant is promptly discharged from the outer tube to ensure the cooling effect.

[0086] In this embodiment, the coolant flows from the inside to the outside, first flowing through the first cooling chamber 16, which is closer to the endoscope cavity 17. Heat exchange between the coolant in the first cooling chamber 16 and the endoscope cavity 17 is achieved through the peripheral sidewalls of the first outer tube 5. The coolant at a lower temperature can better lower the temperature of the endoscope cavity 17, making the temperature of the endoscope cavity 17 more stable, improving the heat resistance of the camera in the endoscope cavity 17, and ensuring normal operation of the camera. Furthermore, because the second outer tube 6 and the third outer tube 7 are farther from the endoscope cavity 17 than the first outer tube 5, the temperature of the second outer tube 6 and the third outer tube 7 is lower than that of the endoscope cavity 17 and the first outer tube 5. Therefore, the temperature of the coolant does not rise too high when it flows to the second cooling chamber 15, which is farther from the endoscope cavity 17, and the coolant does not vaporize, effectively cooling the second outer tube 6 and the third outer tube 7.

[0087] like Figure 1 As shown, in this embodiment, both the first cooling cavity 16 and the second cooling cavity 15 are spiral-shaped. Specifically, a spiral first water conduit 81 is provided in the first cooling cavity 16, and a spiral second water conduit 82 is provided in the second cooling cavity 15. The axes of the first and second water conduits 81, 82 are parallel to the axis of the inner tube 1. The spiral first and second water conduits 81, 82 can enhance the turbulence of the coolant and reduce damage and leakage caused by thermal stress.

[0088] Furthermore, the spiral directions of the first water guide line 81 and the second water guide line 82 are opposite, so that the flow directions of the coolant in the first cooling cavity 16 and the second cooling cavity 15 are opposite, which intensifies the turbulent layer of the coolant, reduces the thickness of the laminar inner layer in the heat transfer boundary layer, improves the convective heat transfer coefficient, and reduces the thermal resistance of the convective heat transfer.

[0089] like Figure 1 As shown, in this embodiment, the pitch d1 of the first water guide line 81 and the pitch d2 of the second water guide line 82 are the same, both 5 cm. In other alternative embodiments, the pitch d1 of the first water guide line 81 and the pitch d2 of the second water guide line 82 can be different, and the pitch range of the two can be selected from 4 to 7 cm.

[0090] In this embodiment, the inner tube 1 is detachably connected to the outer tube. The inner tube 1 can rotate and move axially relative to the outer tube, thereby enabling the observation window 100 fixed to the inner tube 1 to rotate and move axially. This allows for flexible adjustment of the observation window 100, facilitates selection of a suitable shooting position and angle, and improves monitoring effectiveness. For example, when selecting the side observation window 100, the endoscope cavity 17 can be rotated or moved up and down to select a suitable shooting position and angle; when selecting the front observation window 100, the shooting range can be selected by moving the endoscope cavity 17 up and down.

[0091] Specifically, if Figure 1As shown, a flange plate 2 is provided on the side of the inner tube 1 away from the observation window 100. The flange plate 2 is sleeved on the outer circumference of the inner tube 1 and is located outside the outer tube. The connection between the inner tube 1 and the outer tube is achieved by a detachable connection between the flange plate 2 and the first connecting member 3. The flange plate 2 can be fixed to the outer circumference of the inner tube 1 by welding or other means.

[0092] Furthermore, the high-temperature-resistant endoscope includes an axial adjustment member (not shown) that is sleeved around the outer circumference of the inner tube 1 and sandwiched between the flange plate 2 and the outer tube in the axial direction of the inner tube 1. The axial adjustment member can be a structure such as an elastic gasket. By adjusting the thickness of the elastic gasket, the axial position of the inner tube 1 can be adjusted, thereby enabling flexible adjustment of the position of the observation window 100.

[0093] like Figure 2 As shown, the observation window 100 includes a first observation window unit 9 and a second observation window unit 10 in the axial direction of the inner tube 1. The first observation window unit 9 is located above the second observation window unit 10 and is connected to the inner tube 1. The first observation window unit 9 and the second observation window unit 10 are detachably connected. Specifically, the first observation window unit 9 can be fixed to the inner tube 1 by welding, and the first observation window unit 9 and the second observation window unit 10 can be detachably connected by bolts or other means.

[0094] like Figure 2 As shown, the optical lens 14 is sandwiched between the first observation window unit 9 and the second observation window unit 10. Specifically, the side of the first observation window unit 9 facing the second observation window unit 10 has a first receiving groove 21 that is recessed into the interior of the first observation window unit 9, and the side of the second observation window unit 10 facing the first observation window unit 9 has a second receiving groove 22 that is recessed into the interior of the second observation window unit 10. The first receiving groove 21 and the second receiving groove 22 constitute a storage space for the optical lens 14, and the optical lens 14 is sandwiched within the storage space. The storage space not only enables the rapid positioning of the optical lens 14, but also limits the movement of the optical lens 14 relative to the observation window 100, ensuring effective monitoring.

[0095] In this embodiment, since the optical lens 14 is clamped and fixed by the first observation window unit 9 and the second observation window unit 10, the optical lens 14 is detachable compared to the observation window 100, that is, the optical lens 14 in the observation window 100 is replaceable. Therefore, different optical lenses 14 can be replaced to monitor the furnace, thereby collecting different monitoring data and making the monitoring results more accurate. In addition, the optical lens 14 can be replaced with filters with different central wavelengths to obtain spectra of different wavelength bands in the furnace. Further processing can obtain information such as temperature and the excited state of free radicals, allowing for further monitoring of real-time images, reaction conditions, and substance generation conditions in the furnace.

[0096] Furthermore, a first sealing gasket (not shown) may be provided between the optical lens 14 and the bottom of the first receiving groove 21, and / or a second sealing gasket may be provided between the optical lens 14 and the bottom of the second receiving groove 22. The sealing gaskets can prevent the optical lens 14 from directly contacting the observation window 100, thereby reducing wear on the optical lens 14. Furthermore, the sealing gaskets can press the optical lens 14 between the first observation window unit 9 and the second observation window unit 10, thereby preventing the optical lens 14 from moving.

[0097] like Figure 1 As shown, the high-temperature resistant endoscope further includes an air inlet pipe 19, which is provided on the side of the inner tube 1 that is axially away from the observation window 100, and is located on the outside of the outer tube. The outlet end of the air inlet pipe 19 is connected to the inner tube 1, and the air outlet 191 of the air inlet pipe is connected to the endoscope cavity 17. A gas channel is provided on the observation window 100, one end of the gas channel is connected to the endoscope cavity 17, and the other end of the gas channel passes through the end of the observation window 100 that is axially away from the inner tube 1. External gas can enter the endoscope cavity 17 from the air inlet pipe 19 and then be discharged through the gas channel, greatly reducing the impact of fly ash in the furnace on the optical lens 14.

[0098] Specifically, if Figure 2 As shown, the gas channel includes a first gas channel 11 and a second gas channel 13. The first gas channel 11 and the second gas channel 13 both include an outlet section located on the side of the optical lens 14 in the axial direction of the inner tube 1, away from the air inlet pipe 19. The outlet of the outlet section 111 of the first gas channel faces away from the optical lens 14 in the axial direction of the inner tube 1. The outlet of the outlet section 111 of the first gas channel faces into the furnace. The exhaust air is used to prevent fly ash in the furnace from adhering to the observation window 100. The outlet of the outlet section 131 of the second gas channel faces toward the optical lens 14 in the axial direction of the inner tube 1. The outlet of the outlet section 111 of the first gas channel faces into the optical lens 14. The exhaust air is used to blow away dust that has adhered to the observation window 100, thereby improving the clarity of the optical lens 14 and improving the imaging effect.

[0099] Furthermore, if Figure 2 As shown, in this embodiment, the angle α between the axial end face of the optical lens 14 and the axis of the air outlet of the air outlet section 111 of the first gas channel is 60︒~75︒, and the angle β between the axial end face of the optical lens 14 and the axis of the air outlet of the air outlet section 131 of the second gas channel is 5︒~20︒.

[0100] During the use of the high-temperature endoscope, the outer tube is first placed in the gasification furnace window, and then the camera is placed in the endoscope cavity 17. The appropriate optical lens 14 is selected and fixed to the observation window 100 according to the data to be observed. The air inlet pipe 19 can be controlled to provide purge gas. The assembled inner tube 1 is then inserted into the outer tube, and the insertion position of the inner tube 1 is adjusted according to the shooting requirements. At the same time, circulating coolant can be provided to the first cooling chamber 16 and the second cooling chamber 15. At this time, the purge gas sweeps the optical lens 14 through the gas channel to prevent the soot in the furnace from interfering with the image clarity.

[0101] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings of the devices or components. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0102] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A high temperature resistant endoscope, characterized in that: The high temperature resistant endoscope comprises an inner tube, an outer tube and a camera assembly; The interior of the inner tube forms an endoscope cavity, and an observation window is provided at one axial end of the inner tube, and an optical lens is fixed to the observation window; the camera assembly includes a camera, which is provided in the endoscope cavity and located on the side of the inner tube where the observation window is provided; The outer tube is sleeved on the outer circumference of the inner tube. The inner tube and the outer tube are detachably connected. The outer tube has a cooling cavity for accommodating coolant. The cooling cavity is arranged around the outer circumference of the inner tube.

2. The high temperature resistant endoscope according to claim 1, characterized in that: The observation window includes a first observation window unit and a second observation window unit in sequence along the axial direction of the inner tube, the first observation window unit is connected to the inner tube, the first observation window unit and the second observation window unit are detachably connected, and the optical lens is clamped between the first observation window unit and the second observation window unit.

3. The high temperature resistant endoscope according to claim 2, characterized in that: The side surface of the first observation window unit facing the second observation window unit has a first accommodating groove recessed into the interior of the first observation window unit, and the side surface of the second observation window unit facing the first observation window unit has a second accommodating groove recessed into the interior of the second observation window unit. The first accommodating groove and the second accommodating groove constitute an accommodating space for the optical lens, and the optical lens is clamped in the accommodating space.

4. The high temperature resistant endoscope according to claim 3, characterized in that: A first sealing gasket is provided between the optical lens and the bottom of the first receiving groove; and / or a second sealing gasket is provided between the optical lens and the bottom of the second receiving groove.

5. The high temperature resistant endoscope according to claim 1, wherein: The outer tube includes a first outer tube, a second outer tube and a third outer tube; the first outer tube is sleeved on the outer circumference of the inner tube; the second outer tube is sleeved on the outer circumference of the first outer tube, and a first cooling cavity is formed between the second outer tube and the first outer tube; the third outer tube is sleeved on the outer circumference of the second outer tube, and a second cooling cavity is formed between the third outer tube and the second outer tube, and the first cooling cavity and the second cooling cavity are connected.

6. The high temperature resistant endoscope according to claim 5, characterized in that: The high-temperature resistant endoscope also includes a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe are located on the same axial side of the inner tube; the liquid outlet end of the liquid inlet pipe is connected to the second outer tube, and the liquid outlet of the liquid inlet pipe is connected to the first cooling chamber; the liquid inlet end of the liquid outlet pipe is connected to the third outer tube, and the liquid inlet of the liquid outlet pipe is connected to the second cooling chamber.

7. The high temperature resistant endoscope according to claim 5, characterized in that: The first cooling cavity and the second cooling cavity are both spiral-shaped. A spiral first water guide line is provided in the first cooling cavity, and a spiral second water guide line is provided in the second cooling cavity. The axes of the first water guide line and the second water guide line are parallel to the axis of the inner tube, and the spiral directions of the first water guide line and the second water guide line are opposite.

8. The high temperature resistant endoscope according to claim 7, characterized in that: The pitch of the first water guide line is 4-7 cm; and / or the pitch of the second water guide line is 4-7 cm.

9. The high temperature resistant endoscope according to claim 1, wherein: The high-temperature resistant endoscope further includes an air inlet pipe, which is arranged on a side of the inner tube that is axially away from the observation window and is located outside the outer tube; an air outlet end of the air inlet pipe is connected to the inner tube, and an air outlet of the air inlet pipe is in communication with the endoscope cavity; A gas channel is provided on the observation window, one end of the gas channel is communicated with the endoscope cavity, and the other end of the gas channel passes through the observation window and is away from one end of the inner tube in the axial direction of the inner tube.

10. The high temperature resistant endoscope according to claim 9, characterized in that: The gas channel includes a first gas channel and a second gas channel, and the first gas channel and the second gas channel both include an air outlet section located on the side of the optical lens away from the air inlet pipe in the axial direction of the inner tube. The air outlet of the air outlet section of the first gas channel is oriented in the direction away from the optical lens in the axial direction of the inner tube, and the air outlet of the air outlet section of the second gas channel is oriented in the direction close to the optical lens in the axial direction of the inner tube.

11. The high temperature resistant endoscope according to claim 10, characterized in that: The angle between the axial end face of the optical lens and the axis of the air outlet of the air outlet section of the first gas channel is 60°~75°; the angle between the axial end face of the optical lens and the axis of the air outlet of the air outlet section of the second gas channel is 5°~20°.

12. The high temperature resistant endoscope according to claim 1, wherein: A flange plate is provided on a side of the inner tube away from the observation window. The flange plate is sleeved on the outer circumference of the inner tube and located outside the outer tube. The inner tube is detachably connected to the outer tube through the flange plate.

13. The high temperature resistant endoscope according to claim 12, wherein: The high-temperature resistant endoscope further includes an axial adjustment member, which is sleeved on the outer periphery of the inner tube and clamped between the flange plate and the outer tube in the axial direction of the inner tube.

14. The high temperature resistant endoscope according to any one of claims 1 to 13, characterized in that: The high temperature resistant endoscope meets one or more of the following conditions: a. The camera is a monitoring camera or a spectral camera; b. The material of the inner tube is zirconium or copper; c. The material of the outer tube is cobalt alloy or nickel-based alloy; d. The material of the observation window is cobalt alloy or nickel-based alloy.

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