High-temperature-resistant endoscope

Abstract

The invention 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 present invention relates to the technical field of endoscopes, and in particular to a high temperature resistant endoscope. Background Art

[0002] The entrained-flow gasifier is an important industrial production equipment. Its function is to convert solid fuels (such as coal, petroleum coke or biomass) into syngas under high temperature and pressure for power generation, chemical production or liquid fuel synthesis. To ensure the efficient and stable operation of the gasifier, monitoring it is an essential link. Among them, the high-temperature endoscope can be used to observe the combustion conditions in the gasifier in real time, and detect the temperature distribution, airflow flow and fuel reaction in the furnace. The high-temperature endoscope can work normally under extreme working conditions. It can transmit the real-time image of the furnace to the monitoring room through the optical system, so that the operator can observe the operation status of the furnace at a safe distance. These images can not only show the flame morphology of the combustion area, but also display important parameters such as temperature distribution and substance concentration through specific filters and sensors. In practical applications, the high-temperature endoscope can help operators to promptly detect and deal with abnormal conditions in the gasifier. For example, when problems such as incomplete combustion, too high or too low temperature, and fuel accumulation occur, the operator can quickly adjust the operating parameters such as fuel supply, airflow velocity and furnace temperature through real-time image and data analysis to ensure the stability and efficiency of the gasification process. In addition, the high temperature endoscope can also record and store monitoring data for subsequent analysis and optimization. By analyzing historical data, technicians can better understand the operating rules of the gasifier, 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 uses multiple lenses to optically reflect images, which are ultimately transmitted to an image processor located outside the endoscope for imaging. However, this method has a poor effect on imaging quality due to the long optical path of the endoscope. Summary of the invention

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

[0005] The present invention 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 inner tube forms an endoscope cavity, one axial end of the inner tube is provided with an observation window, and an optical lens is fixed to the observation window; the camera assembly includes a camera, which is arranged in the endoscope cavity and located on a side of the inner tube where the observation window is arranged;

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

[0009] In this solution, the camera capable of imaging is placed directly in the endoscope cavity, eliminating the process of optical reflection of the lens, greatly shortening the imaging optical path, and effectively improving the imaging quality. A liquid cooling structure is set on the outer side of the endoscope cavity to 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.

[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 above arrangement makes the optical lens in the observation window replaceable, so that different optical lenses can be replaced to monitor the furnace, and then different monitoring data can be collected to make the monitoring results more accurate. In addition, the optical lens can be replaced with filters with different central wavelengths, etc., to obtain spectra of different bands in the furnace, and further processing can obtain information such as temperature and excited state of free radicals, and the real-time image, reaction conditions, material generation conditions, etc. in the furnace can be further monitored.

[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 a 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 can also limit the movement of the optical lens relative to the observation window on the other hand, thereby ensuring the monitoring effect.

[0014] Preferably, 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.

[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 closer to the endoscope cavity, which can better reduce the temperature of the endoscope cavity, make the temperature of the endoscope cavity more stable, improve the heat resistance of the camera in the endoscope cavity, and ensure the normal operation of the camera. When the coolant flows to the second cooling chamber farther from the endoscope cavity, the temperature will not be too high, and the coolant will not vaporize, which can effectively cool 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 first water guide and the second water guide can enhance the disturbance of the coolant and reduce the damage and leakage caused by thermal stress. The flow directions of the coolant in the first cooling cavity and the second cooling cavity 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 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 disturbance capacity of the coolant.

[0024] Preferably, the high temperature resistant endoscope further comprises an air inlet pipe, which is arranged on a side of the inner tube away from the observation window in the axial direction thereof, and is located on the outside of the outer tube; the air outlet end of the air inlet pipe is connected to the inner tube, and the air outlet of the air inlet pipe is 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 the 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, so as to improve the clarity of the optical lens and improve 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 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 is located outside the outer tube, and the inner tube is detachably connected to the outer tube via 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 circumference 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 arrangement allows the axial position of the inner tube relative to the outer tube to be adjusted. 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 material.

[0039] In this solution, the monitoring camera and the spectral camera are compact and easy to put into the endoscope cavity. Zirconium, copper, cobalt alloy, and nickel-based alloy materials are resistant to high temperatures and have a long service life.

[0040] The positive and progressive effect of the present invention is that the camera capable of imaging is directly placed in the endoscope cavity, eliminating the process of optical reflection of the lens, greatly shortening the imaging optical path, and effectively improving the imaging quality. A liquid cooling structure is arranged on the outer peripheral side of the endoscope cavity, which can 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 FIG. 1 is a schematic diagram of the internal structure of an endoscope according to an embodiment of the present invention.

[0042] Figure 2 FIG. 4 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] The third outer tube 7

[0052] First water line 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] The gas outlet section 111 of the first gas channel

[0059] The 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] The 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 air inlet pipe 191

[0070] Signal hole 20

[0071] The first receiving groove 21

[0072] The second receiving groove 22

[0073] Closing 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, comprising 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 in the furnace.

[0077] In this embodiment, the material of the inner tube 1 is zirconium, and the material of the observation window 100 is a cobalt alloy (such as G-CoCr28 alloy material). Zirconium and cobalt are resistant to high temperatures, have high strength, good wear resistance, and long service life. In other alternative embodiments, the inner tube 1 and the observation window 100 can also be made of other materials that meet the above requirements, such as zirconium, copper, steel, cobalt, nickel, etc.

[0078] The camera assembly in this embodiment includes a camera and a data transmission line. The camera is arranged in the endoscope cavity 17 and is located on the side of the inner tube 1 where the observation window 100 is arranged. The camera can directly form an image, that is, directly photograph the image obtained from the optical lens 14 of the observation window 100, eliminating the traditional process of relying on the optical reflection of the lens, greatly shortening the imaging optical path, effectively improving the imaging quality, and improving the clarity of the shooting. One end of the data transmission line is connected to the camera, and the other end of the data transmission line passes through the signal hole 20 on the sealing plate 23 and is connected to a computer or other equipment to transmit the pictures taken 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 on the outer periphery of the inner tube 1, and the outer tube has a cooling cavity for containing a coolant, and the cooling cavity 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] The material of the outer tube in this embodiment is a cobalt alloy (such as G-CoCr28 alloy material). Cobalt is resistant to high temperatures, has high strength, good wear resistance, and long service life. In other alternative embodiments, the outer tube can also be made of other materials that meet the above requirements, such as zirconium, copper, steel, nickel, etc.

[0082] Specifically, Figure 1 As shown, the outer tube includes a first outer tube 5, a second outer tube 6 and a third outer tube 7, and 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 against the outer circumference of the inner tube 1. The first outer tube 5 is used to fix the position of the inner tube 1 to prevent the inner tube 1 from being offset. The second outer tube 6 is sleeved on the outer circumference of the first outer tube 5, and a first cooling cavity 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 cavity 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 requirements.

[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 (apart from the observation window 100) of the inner tube 1 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 connected through the first connecting piece 3. The upper end of the inner tube 1 extends above the first connecting piece 3. The first connecting piece 3 in this embodiment is an annular plate. The first connecting piece 3 is sleeved on the outer periphery of the inner tube 1. The first connecting piece 3 is fixed to the upper ports of the first outer tube 5, the second outer tube 6, and the third outer tube 7 and blocks the upper ports 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 close to the observation window 100 at one end ( Figure 1 The second outer tube 6 and the second connecting member 12 are flush with each other and connected by the second connecting member 12. A gap is provided between the second outer tube 6 and the second connecting member 12 in the axial direction of the inner tube 1, and the gap realizes the communication between the first cooling cavity 16 and the second cooling cavity 15. The double-layer 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] Furthermore, 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 away from the observation window 100 in its axial direction. 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 connected to 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 connected to the second cooling chamber 15. The external coolant can flow into the first cooling chamber 16 by means of the liquid inlet pipe 18, and then be discharged from the second cooling chamber 15 by means of the liquid outlet pipe 4, thereby ensuring that the coolant with low temperature continuously flows into the outer tube, and the heated coolant is discharged from the outer tube in time to ensure the cooling effect.

[0086] In this embodiment, the coolant flows from the inside to the outside, and the coolant first flows through the first cooling cavity 16 closer to the endoscope cavity 17, and the heat exchange between the coolant in the first cooling cavity 16 and the endoscope cavity 17 is realized through the peripheral side wall of the first outer tube 5. The coolant with a lower temperature can better reduce 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 the normal operation of the camera. In addition, since the second outer tube 6 and the third outer tube 7 are farther away 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 will be lower than the temperature of the endoscope cavity 17 and the first outer tube 5. Therefore, the temperature of the coolant will not be too high when it flows to the second cooling cavity 15 farther away from the endoscope cavity 17, and the coolant will not be vaporized, so the second outer tube 6 and the third outer tube 7 can be effectively cooled.

[0087] like Figure 1 As shown, the first cooling cavity 16 and the second cooling cavity 15 in this embodiment are both spiral. Specifically, a spiral first water guide 81 is provided in the first cooling cavity 16, and a spiral second water guide 82 is provided in the second cooling cavity 15. The axes of the first water guide 81 and the second water guide 82 are parallel to the axis of the inner tube 1. The spiral first water guide 81 and the second water guide 82 can enhance the disturbance of the coolant and reduce the 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, the turbulent layer of the coolant is intensified, the thickness of the laminar inner layer in the heat transfer boundary layer can be reduced, the convective heat transfer coefficient is improved, and the thermal resistance of the convective heat transfer is reduced.

[0089] like Figure 1 As shown, in this embodiment, the pitch d of the first water guide wire 81 is 1 and the pitch d of the second water guide wire 82 2 In other alternative embodiments, the pitch d of the first water conductor 81 is 5 cm. 1 and the pitch d of the second water guide wire 82 2 They can be different, and the pitch range of the two can be selected between 4 and 7 cm.

[0090] In this embodiment, the inner tube 1 is detachably connected to the outer tube, and the inner tube 1 can rotate and move axially relative to the outer tube, so that the observation window 100 fixed on the inner tube 1 can rotate and move axially, realizing flexible adjustment of the observation window 100, facilitating the selection of a suitable shooting position and angle, and improving the monitoring effect. 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, Figure 1 As 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 on the outer circumference of the inner tube 1 by welding or the like.

[0092] Furthermore, the high temperature resistant endoscope further comprises an axial adjustment member (not shown in the figure), which is sleeved on the outer periphery of the inner tube 1 and clamped 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, and the axial position of the inner tube 1 can be adjusted by adjusting the thickness of the elastic gasket, thereby achieving 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 sequence along the axial direction of the inner tube 1, the first observation window unit 9 is located above the second observation window unit 10, the first observation window unit 9 is connected to the inner tube 1, and 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 bolt connection or the like.

[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 first observation window unit 9 has a first receiving groove 21 that is recessed into the first observation window unit 9 on one side facing the second observation window unit 10, and the second observation window unit 10 has a second receiving groove 22 that is recessed into the second observation window unit 10 on one side facing the first observation window unit 9. The first receiving groove 21 and the second receiving groove 22 constitute a receiving space for the optical lens 14, and the optical lens 14 is sandwiched in the receiving space. The receiving space can realize the rapid positioning of the optical lens 14 on the one hand, and can also limit the movement of the optical lens 14 relative to the observation window 100 on the other hand, so as to ensure the monitoring effect.

[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, and then different monitoring data can be collected to make the monitoring results more accurate. In addition, the optical lens 14 can be replaced with filters with different central wavelengths, etc., to obtain spectra of different bands in the furnace, and further processing can obtain information such as temperature and the excited state of free radicals, and the real-time image, reaction conditions, and material generation conditions in the furnace can be further monitored.

[0096] Furthermore, a first sealing gasket (not shown in the figure) 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 gasket can prevent the optical lens 14 from directly contacting the observation window 100, thereby reducing the wear of the optical lens 14, and 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 arranged on the side of the inner tube 1 far away from the observation window 100 in the axial direction thereof, and the air inlet pipe 19 is located on the outside of the outer tube. The air 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 far away from the inner tube 1 in the axial direction of 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, which greatly reduces the influence of fly ash in the furnace on the optical lens 14.

[0098] Specifically, Figure 2 As shown, the gas channel includes a first gas channel 11 and a second gas channel 13, and both the first gas channel 11 and the second gas channel 13 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 the direction away from the optical lens 14 in the axial direction of the inner tube 1, and the outlet of the outlet section 111 of the first gas channel faces the furnace, and the wind discharged is used to prevent the 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 the direction close to the optical lens 14 in the axial direction of the inner tube 1, and the outlet of the outlet section 111 of the first gas channel faces the optical lens 14, and the wind discharged is used to blow away the dust that has been attached to the observation window 100, so as to improve the clarity of the optical lens 14 and improve 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 outlet of the 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 outlet of the outlet section 131 of the second gas channel is 5︒~20︒.

[0100] During the use of the high temperature endoscope, first put the outer tube into the gasification furnace window, then put the camera into the endoscope cavity 17 and select the appropriate optical lens 14 to be fixed on the observation window 100 according to the data to be observed, and the air inlet pipe 19 can be controlled to provide purge gas. Then insert the assembled inner tube 1 into the outer tube, and adjust the insertion position of the inner tube 1 according to the shooting requirements. At the same time, circulating coolant can be provided to the first cooling cavity 16 and the second cooling cavity 15. At this time, the purge gas purges the optical lens 14 through the gas channel to prevent the soot in the furnace from interfering with the imaging 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" and "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, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0102] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope 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, but these changes and modifications all fall within the protection scope 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 inner tube forms an endoscope cavity, one axial end of the inner tube is provided with an observation window, and an optical lens is fixed to the observation window; the camera assembly includes a camera, which is arranged in the endoscope cavity and located on a side of the inner tube where the observation window is arranged; The outer tube is sleeved on the outer circumference of the inner tube, the inner tube is detachably connected to the outer tube, and the outer tube has a cooling cavity for accommodating a coolant, and 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: A side surface of the first observation window unit facing the second observation window unit has a first accommodating groove recessed into the first observation window unit, and a side surface of the second observation window unit facing the first observation window unit has a second accommodating groove recessed into 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, characterized in that: 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 is connected to the second cooling cavity.

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 wire is provided in the first cooling cavity, and a spiral second water guide wire is provided in the second cooling cavity. The axes of the first water guide wire and the second water guide wire are parallel to the axis of the inner tube, and the spiral directions of the first water guide wire and the second water guide wire 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, characterized in that: The high temperature resistant endoscope further comprises an air inlet pipe, which is arranged on a side of the inner tube away from the observation window in the axial direction thereof, 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 communicated 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 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 outlet of the outlet section of the first gas channel faces 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 faces 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, characterized in that: 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. The inner tube is detachably connected to the outer tube via the flange plate.

13. The high temperature resistant endoscope according to claim 12, characterized in that: 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.

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 material.

Images