Fixed-point explosion-proof infrared telemetering gas leak detector

Abstract

The invention discloses a fixed-point explosion-proof infrared telemetering gas leak detector. The fixed-point explosion-proof infrared telemetering gas leak detector is composed of a two-axis dual-light explosion-proof holder, a narrow-band thermal infrared imager and a visible light and network switch module. The holder is composed of an orientation component, a pitching component, a thermal image shield component, a visible light shield component and a connecting shaft sleeve, the pitching component is connected with the orientation component through a screw to form a two-axis orientation axis system, and the thermal image shield component and the visible light shield component are located on the left side and the right side of the two-axis double-light explosion-proof holder respectively and connected with the pitching component to form a pitching axis system of the holder; the thermal imager comprises an infrared optical lens and a detector; the front part of the thermal image shield part is provided with an infrared window, and the infrared window and the infrared light axis are obliquely arranged; the visible light and network switch module comprises a visible light assembly and a network switch. The visible light optical axis of the visible light assembly is consistent with the infrared light axis. According to the invention, leaked gas is displayed, alarmed and recorded in the form of a photoelectric image.

Description

Technical Field

[0001] The invention belongs to the technical field of spectrum detection and relates to a fixed-point explosion-proof infrared remote sensing gas leak detector. Background Art

[0002] Currently, there are two types of gas leak detection: contact and non-contact. Contact gas detection can be divided into free diffusion detection, aspiration detection and fiber optic detection according to the type of detector. Contact gas detection has high sensitivity and is relatively cheap. Each probe is designed for a certain gas to be measured, and there are many types of detector gases. Non-contact gas detection can be divided into laser detection and infrared detection. Laser detection is an active detection that requires a single working wavelength to be set for a specific gas to be measured. Infrared gas detection is a passive detection. In theory, as long as there is an absorption peak in the atmospheric window and a target-background temperature difference exists, it can be detected. Infrared detection can be divided into hyperspectral, multispectral and narrowband gas detection according to the degree of subdivision of the working band. Hyperspectral equipment generally uses a cooled detector with an interferometer. The working bands include long wave, medium wave, and full-band modes. The detectors are either unit or array. Compared with hyperspectral equipment using array detectors, hyperspectral equipment using unit detectors has higher sensitivity and a longer effective range. Hyperspectral equipment can identify the type of leaking gas. Multispectral equipment generally uses uncooled detectors. Compared with hyperspectral detection equipment, it can detect fewer types of gases and has a relatively short effective range. Narrow-band gas detection generally uses array detectors, which are available in cooled, uncooled, medium wave, and long wave. They can image the gas being measured but cannot identify the type of gas.

[0003] At present, the above-mentioned devices have certain user groups in different application scenarios, but they have the following shortcomings:

[0004] 1) Although contact gas detection is highly sensitive and inexpensive, each probe can only detect one or several gases. Since it is contact type, even if a gas leak occurs, as long as the gas does not contact the probe, there will be no alarm. Even if a gas leak is detected, it can only send an alarm signal, and there is no traceable data.

[0005] 2) Laser detection equipment must have an active laser source and must set a single working wavelength for the gas being measured. It cannot measure gases other than cooperative gases and is more expensive.

[0006] 3) Hyperspectral and multispectral gas detection have higher sensitivity and longer effective range than narrow-band gas detection. However, hyperspectral and multispectral gas detection can only detect gases that are pre-loaded into the spectral database. In addition, hyperspectral and multispectral detection equipment has complex structure and is expensive. Summary of the invention

[0007] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a fixed-point explosion-proof infrared remote sensing gas leak detector, which adopts infrared narrow-band gas detection technology to display the leaked gas on the screen in the form of a photoelectric image. When a gas leak occurs, an alarm signal can be issued in time, and the accident scene can be recorded. Specifically, it includes:

[0008] 1) It can image the measured gas in real time and provide 7×24 hours of uninterrupted monitoring services on site. It can work in a network with multiple devices. When a gas leak occurs, it can send an alarm signal to the upper computer and record the accident scene;

[0009] 2) The product has no complex motion mechanism, which reduces production and maintenance costs, improves product environmental adaptability and reliability, and is suitable for a large number of equipment;

[0010] 3) No spectral database is required and a variety of gases can be detected.

[0011] To this end, the overall technical solution of the present invention is:

[0012] The leak detector is composed of a two-axis dual-light explosion-proof pan / tilt, a narrow-band infrared thermal imager, a visible light and a network switch module;

[0013] The two-axis dual-light explosion-proof gimbal is composed of an azimuth component, a pitch component, a thermal imaging shield component, a visible light shield component, and a coupling sleeve, wherein the pitch component is connected to the azimuth component by screws to form an azimuth axis system of the two-axis dual-light explosion-proof gimbal, and the azimuth axis system has a working range of 360°×N. The thermal imaging shield component and the visible light shield component are respectively located on the left and right sides of the two-axis dual-light explosion-proof gimbal and are connected to the pitch component by coupling sleeves and screws to form a pitch axis system of the two-axis dual-light explosion-proof gimbal, and the pitch axis system has a working range of -90°~+90;

[0014] The narrow-band infrared thermal imager, visible light and network switch modules are respectively installed in the thermal imaging cover component and the visible light cover component;

[0015] The narrow-band infrared thermal imager includes a narrow-band infrared optical lens and a narrow-band infrared focal plane detector. The narrow-band infrared optical lens ensures that the energy entering the infrared optical system is near the infrared absorption peak of the gas being measured, and restricts the non-beneficial energy from entering the optical system. The narrow-band infrared focal plane detector ensures that the detector response peak is near the infrared absorption peak of the gas being measured, has the maximum photoelectric response to the gas being measured, and eliminates excess background noise. The use of the narrow-band infrared optical lens and the narrow-band infrared focal plane detector can greatly improve the signal-to-noise ratio of the infrared thermal imager for gas cloud imaging;

[0016] An infrared window is provided at the front of the thermal imaging shield component, and the infrared window is installed obliquely with respect to the infrared optical axis, and its inclination angle is greater than half of the field of view of the infrared fixed-focus lens or half of the large field of view of the continuously variable magnification / multi-field of view, so as to ensure that the stray light generating cold reflection deviates from the infrared optical lens, thereby preventing the generation of cold reflection;

[0017] The visible light and network switch module includes a visible light component and a network switch. The network switch is respectively connected to the narrow-band infrared thermal imager and the visible light component for communication and networking with a host computer. The visible light axis of the visible light component is consistent with the infrared light axis.

[0018] Specifically, a fixed-point explosion-proof infrared telemetry gas leak detector of the present invention is composed of a two-axis dual-light explosion-proof pan-tilt, a narrow-band infrared thermal imager, a visible light and a network switch module. The narrow-band infrared thermal imager, the visible light and the network switch module are respectively installed in the thermal imager shield cylinder and the visible light shield cylinder of the two-axis dual-light explosion-proof pan-tilt, and fastened with screws. Since some infrared absorption peaks of the detected gas are distributed in the medium-wave band and some are distributed in the long-wave band, the narrow-band infrared thermal imager used to detect gas leaks has two configurations, medium-wave and long-wave; in order to allow as much energy as possible to enter the infrared optical system, the infrared window of the medium-wave thermal imager is made of sapphire material. Sapphire material has high strength and can meet the explosion-proof requirements itself, and no explosion-proof steel window is provided in front of the window; the infrared window of the long-wave thermal imager is made of germanium material. Germanium material is soft and has relatively low strength. In order to meet the explosion-proof requirements, an explosion-proof steel window is installed in front of the window; for this reason, the two-axis dual-light explosion-proof pan-tilt has a steel window without a steel window and a steel window with a steel window Two configurations, used to install medium-wave thermal imager and long-wave thermal imager respectively; to improve the gas cloud imaging effect, the infrared thermal imager adopts narrow-band imaging, the infrared optical lens and the infrared focal plane detector both adopt narrow-band, and the narrow-band filter of the infrared focal plane detector is installed in the Dewar to reduce the thermal noise caused by the narrow-band filter; to improve the sensitivity of the gas leak detector, the focal plane material of the infrared focal plane detector adopts MCT (mercury cadmium telluride), and the proportions of the three materials of tellurium, cadmium and mercury are configured according to the response band of the measured gas to ensure that the response peak of the infrared focal plane detector matches the band where the absorption peak of the measured gas is located.

[0019] The gas leak detector is divided into narrow-band medium-wave infrared gas leak detector and narrow-band long-wave infrared gas leak detector according to the different working bands of the infrared thermal imager. Among them: the narrow-band medium-wave infrared gas leak detector is composed of a two-axis dual-light explosion-proof pan-tilt without a steel window, a narrow-band medium-wave infrared thermal imager, a visible light and network switch module. The narrow-band medium-wave infrared thermal imager and the visible light and network switch module are respectively installed in the thermal imager shield cylinder and the visible light shield cylinder of the two-axis dual-light explosion-proof pan-tilt without a steel window, and are fastened with screws. The narrow-band long-wave gas leak detector is composed of a two-axis dual-light explosion-proof pan-tilt with a steel window, a narrow-band long-wave infrared thermal imager, a visible light and network switch module. The narrow-band long-wave infrared thermal imager and the visible light and network switch module are respectively installed in the thermal imager shield cylinder and the visible light shield cylinder of the two-axis dual-light explosion-proof pan-tilt with a steel window, and are fastened with screws.

[0020] The two-axis dual-light explosion-proof pan / tilt without steel windows is composed of an azimuth component, a pitch component, a medium-wave thermal imaging cover component, a visible light cover component, and a coupling sleeve, wherein the pitch component is connected to the azimuth component by screws to form an azimuth axis system of the two-axis dual-light explosion-proof pan / tilt without steel windows, and the working range of the azimuth axis system is: 360°×N; the medium-wave thermal imaging cover component and the visible light cover component are connected to the pitch component by coupling sleeves and screws to form a pitch axis system of the two-axis dual-light explosion-proof pan / tilt with steel windows, and the working range of the pitch axis system is: -90°~+90°.

[0021] The two-axis dual-light explosion-proof pan / tilt with steel windows is composed of an azimuth component, a pitch component, a long-wave thermal image shield component, a visible light shield component, and a coupling sleeve, wherein the pitch component is screwed to the azimuth component to form an azimuth axis system of the two-axis dual-light explosion-proof pan / tilt with steel windows, and the working range of the azimuth axis system is: 360°×N; the long-wave thermal image shield component and the visible light shield component are connected to the pitch component through a coupling sleeve and screws to form a pitch axis system of the two-axis dual-light explosion-proof pan / tilt with steel windows, and the working range of the pitch axis system is: -90°~+90°.

[0022] The azimuth component is installed in the inner hole of the first azimuth seat by the third bearing and fastened by the second bearing pressure ring. The second azimuth seat is installed in the inner hole of the third bearing and fastened by the first bearing pressure ring. A lip seal ring is installed on the lower side of the third bearing, and its outer and inner diameters are in contact with the first azimuth seat and the second azimuth seat respectively to form a dynamic seal of the azimuth component. An O-ring is installed in the sealing groove on the upper end face of the mounting flange of the first azimuth seat to form a static seal with the pitch component. A first shaft sleeve is installed in the inner hole of the first azimuth seat, and a clearance fit is adopted between the first shaft sleeve and the first azimuth seat and the second azimuth seat. The size and length of the clearance of the fitting surface meet the explosion-proof requirements. ; A first bearing is installed in the inner hole at the upper end of the first azimuth seat, the outer ring of the bearing is in contact with the first sleeve, and the inner ring is suspended; the first worm wheel, the first gear, and the first bearing adjustment gasket are installed in sequence on the upper end of the first bearing and locked with a locking nut. The first bearing adjustment gasket is used to eliminate the axial clearance between the third bearing and the first bearing to ensure that the bearing can rotate flexibly when the locking nut is tightened; a flat key is installed in the keyway of the second azimuth seat and the first worm wheel, and the flat key ensures that the second azimuth seat and the first worm wheel rotate synchronously; the first gear is fastened to the first worm wheel with a screw; a second bearing is installed in the inner hole at the upper end of the second azimuth seat, and the first bearing is clamped with the first bearing The first slip ring is fastened with a ring; the second sleeve is installed in the first slip ring, the gap between the slip ring stator and the inner hole of the second sleeve is filled with epoxy resin, the second sleeve is installed in the inner hole on the lower side of the second azimuth seat, the second sleeve and the second azimuth seat are matched with clearance, the size of the clearance and the length of the matching surface meet the explosion-proof requirements, and the first slip ring is fastened with the second azimuth seat by screws; the lead of the first slip ring rotor passes through the inner hole of the second bearing to prevent the lead of the slip ring rotor from being damaged during the long-term rotation of the pan-tilt head; the azimuth drive component is installed at the upper end of the first azimuth seat, positioned by the inner hole at the upper end of the first azimuth seat, and fastened by screws; the first worm is meshed with the first worm wheel to provide The power for the rotation of the azimuth components; the power supply circuit board, servo control board, and main control circuit board are installed in the inner cavity on the lower side of the second azimuth seat and are fastened with studs and screws; an O-ring is installed in the sealing groove on the upper end face of the bottom cover, and the bottom cover is installed on the lower side of the second azimuth seat and is fastened with screws; two terminal posts are provided on the upper end face of the bottom cover, which are used to connect the pan / tilt to the chassis ground and the earth, and a ground wire mark, a ground wire and a grounding mark are installed on the studs and are fastened with nuts; an explosion-proof socket is installed in the socket mounting hole on the lower side of the second azimuth seat, and the gap between the explosion-proof socket and the second azimuth seat and the gap between the lead wires in the socket are filled with epoxy resin to ensure explosion-proof requirements.

[0023] The azimuth drive component is connected to the pitch interface plate by a worm bearing seat and an azimuth motor seat through screws and is positioned by a cylindrical pin; the fourth bearing and the seventh bearing are installed in the bearing mounting holes of the azimuth motor seat and the worm bearing seat, and the first worm, the seventh bearing, the first worm and the fourth bearing are installed in the bearings, and are respectively fastened by the inner hole shoulder of the azimuth motor seat, the second bearing adjustment gasket and the third bearing pressure ring; the second bearing adjustment gasket is used to adjust the axial clearance between the seventh bearing and the fourth bearing. When the bearing clearance is eliminated, the bearing can rotate flexibly, and the third bearing pressure ring is fastened to the worm bearing seat by screws; the third pulley baffle plate and the fourth pulley baffle plate are respectively installed on both sides of the second pulley to prevent the During the movement of a synchronous belt, it slides out from the second pulley; the third pulley baffle, the second pulley and the fourth pulley baffle are sequentially mounted on the first worm shaft and fastened with screws; a flat key is installed in the keyway of the first worm, the third pulley baffle, the second pulley and the fourth pulley baffle to ensure that the first worm and the second pulley rotate synchronously; the first motor is installed on the azimuth motor seat and fastened with screws; the second pulley baffle, the first pulley and the first pulley baffle are sequentially mounted on the motor shaft of the first motor and fastened with screws; a flat key is installed in the keyway of the motor shaft of the first motor, the second pulley baffle, the first pulley and the first pulley baffle to ensure that the first motor shaft and the first pulley can rotate synchronously; The first synchronous belt is installed on the second pulley, which is used to transmit the rotation of the first motor to the first worm gear, so as to provide power for the azimuth driving component; the encoder shaft is installed on the pitch interface plate and fastened with screws; the fifth bearing and the sixth bearing are installed in the hole at the upper end of the encoder shaft, which are fastened with the fifth bearing pressure ring; the first magnet mounting shaft is installed in the inner holes of the fifth bearing and the sixth bearing, which are fastened with the fourth bearing pressure ring; the second gear is installed on the shaft at the upper end of the first magnet mounting shaft, which is fastened with the second gear pressure plate, and the second gear pressure plate is fastened to the first magnet mounting shaft with screws; a vertical plate is provided in the circumference of the second gear pressure plate, and the vertical plate cooperates with the optical coupler installed on the first encoder demodulation board, Used to set the rotation zero position of the azimuth component; a first magnet is installed in the mounting hole in the middle of the upper end of the first magnet mounting shaft and is firmly bonded with epoxy resin; the first magnetic encoder chip is installed on the first encoder demodulation board, and its center is facing the central axis of the first magnet, and the first magnetic encoder chip can calculate the rotation angle of the first magnet mounting shaft in real time; the second gear is meshed with the first gear in the azimuth component, and the first worm drives the first worm wheel while synchronously transmitting the rotation to the first magnet mounting shaft, which is used for real-time measurement of the angular position of the pitch component in the azimuth component; the first encoder demodulation board is fixed to the encoder demodulation board mounting frame by screws, and the encoder demodulation board mounting frame is connected to the pitch interface board by screws.

[0024] The pitch component is equipped with a pitch bearing seat on the left and right sides of the main cylinder body, and the pitch bearing seat is connected to the main cylinder by welding; the third sleeve, the eighth bearing and the ninth bearing are installed in the left side of the pitch bearing seat, and the eighth bearing and the ninth bearing are installed on both sides of the third sleeve respectively. The medium-wave thermal imaging cover component is installed in the eighth bearing, the ninth bearing and the inner hole of the third sleeve. The third sleeve, the pitch bearing seat and the medium-wave thermal imaging cover component are matched with clearance, and the clearance size and matching length meet the explosion-proof requirements; between the pitch bearing seat and the medium-wave thermal imaging cover component , a lip seal is installed on the outside of the eighth bearing; the third bearing adjustment gasket, bearing spacer, third gear, and second worm gear are installed on the shaft of the medium-wave thermal imaging cover component in sequence and fastened with a worm gear pressure ring. The third bearing adjustment gasket is used to adjust the axial clearance between the eighth bearing and the ninth bearing; a flat key is installed in the keyway of the third gear, the second worm gear and the medium-wave thermal imaging cover component to ensure that the third gear, the second worm gear and the medium-wave thermal imaging cover component rotate synchronously; the fourth shaft sleeve, the tenth bearing, the eleventh bearing, the tenth bearing, the eleventh shaft The bearings are respectively installed on both sides of the fourth sleeve, the visible light shield component is installed in the tenth bearing, the eleventh bearing and the inner hole of the fourth sleeve, and the fourth sleeve, the pitch bearing seat and the visible light shield component are matched with a clearance, and the clearance size and the matching length meet the explosion-proof requirements; the visible light shield component is fastened to the tenth bearing by the sixth bearing pressure ring, and the third bearing adjustment gasket is used to adjust the axial clearance between the tenth bearing and the eleventh bearing; between the pitch bearing seat and the visible light shield component, and on the outside of the eleventh bearing, a lip sealing ring is installed; between the medium-wave thermal imaging shield component and the visible light shield component The coupling sleeves and screws are used for connection and fastening, and the screws are installed in the keyways of the rotating shafts of the medium-wave thermal imaging cover component and the visible light cover component to ensure that the rotation angles of the medium-wave thermal imaging cover component and the visible light cover component are consistent; the pitch drive component is connected to the pitch bearing seat and the main cylinder by screws; the fourth gear of the pitch drive component is meshed with the third gear, and the second worm is meshed with the second worm gear; the first image processing board and the second image processing board are connected to the main cylinder by studs and screws; the main cylinder cover is connected to the main cylinder by its own thread, and an O-ring is installed in the sealing groove on the upper end face of the main cylinder.

[0025] The pitch drive mechanism is provided with a fourteenth bearing and an eleventh bearing in the pitch motor seat, and a second worm is provided in the inner holes of the fourteenth bearing and the eleventh bearing, the outer diameter of the fourteenth bearing contacts the step of the corresponding bearing hole of the pitch motor seat, the inner ring contacts the shaft shoulder of the second worm, the inner ring of the eleventh bearing contacts the shaft shoulder of the second worm, the outer ring contacts the fourth adjusting gasket and the seventh bearing pressure ring, the fourth adjusting gasket is used to adjust the axial clearance between the fourteenth bearing and the eleventh bearing, and the eleventh bearing is fastened by the seventh bearing pressure ring. The seventh bearing pressure ring is connected to the pitch motor seat by screws; the sixth pulley baffle, the third pulley, and the fifth pulley baffle are sequentially mounted on the second worm shaft and fastened with screws; flat keys are installed in the sixth pulley baffle, the third pulley, the fifth pulley baffle and the second worm keyway to ensure that the third pulley rotates synchronously with the second worm; the second motor is installed on the pitch motor seat and the motor is fastened with screws; the eighth pulley baffle, the fourth pulley, and the seventh pulley baffle are sequentially mounted on the shaft of the second motor and fastened with screws; Flat keys are installed in the pulley, the seventh pulley baffle plate and the keyway of the second motor to ensure that the fourth pulley rotates synchronously with the second motor shaft; the second synchronous belt is installed on the fourth pulley and the third pulley; the twelfth bearing, the thirteenth bearing and the second magnet mounting shaft are installed in the pitch motor seat, the twelfth bearing and the thirteenth bearing are fastened to the pitch motor seat by the pitch encoder bearing pressure plate and screws, the second magnet mounting shaft is installed in the twelfth bearing and the thirteenth bearing, and is fixed by the second bearing clamp ring; the fourth gear is installed on the second magnet mounting shaft, meshes with the third gear of the pitch component, and is fastened by the third gear pressure plate; a vertical plate is provided in the circumference of the third gear pressure plate, and the vertical plate cooperates with the optical coupler installed on the second encoder demodulation board to provide a zero position for the pitch drive component; the second magnet is installed in the mounting hole at the center of the second magnet mounting shaft, and the second magnet is firmly bonded by epoxy resin; the second magnetic encoder chip installed on the second encoder demodulation board is aligned with the center of the second magnet, and is used to measure the angular position of the second magnet mounting shaft in real time; the second encoder demodulation board is connected to the pitch motor seat by screws.

[0026] The medium-wave thermal imaging shield component is provided with a second fan and a first fan for heat dissipation at the front and rear of the narrow-band medium-wave infrared thermal imager. The second fan is connected to the second fan mounting frame by screws. The second fan mounting frame and the thermal imaging mounting plate are connected to the mounting base plate of the narrow-band medium-wave infrared thermal imager by screws, and are installed in the first thermal imager shield cylinder as a whole and fastened by screws; the first fan is connected to the first fan mounting frame by screws, and the first fan mounting frame and the first fan are installed as a whole at the rear of the narrow-band medium-wave infrared thermal imager and connected to the first thermal imager shield cylinder by screws; the first infrared window, the first rubber pad, the first infrared window pressure ring, and the second infrared window pressure ring are installed in the first front cover in sequence and fastened by screws; the first front cover is connected to the first thermal imager shield cylinder by its own thread, and an O-ring is installed in the sealing groove at the front end of the first thermal imager shield cylinder; the second slip ring is installed in the first slip ring sleeve, and the slip ring stator and the inner hole clearance of the first slip ring sleeve are matched , firmly bonded with epoxy resin, the cavity between the slip ring stator lead and the first slip ring sleeve is filled with epoxy resin, the thickness of the epoxy resin meets the explosion-proof requirements, the first slip ring sleeve is installed in the first pitch axis, the clearance is matched, and the first pitch slip ring pressure ring is used to tighten, the clearance size and the matching surface length between the first slip ring sleeve and the first pitch axis meet the explosion-proof requirements; the second rubber pad is installed in the first thermal imager shield cylinder, installed between the first pitch axis and the first thermal imager shield cylinder, the first pitch axis is used It is connected to the first thermal imager shield cylinder with screws; the first pitch axis pressure ring is installed on the outside of the first pitch axis and is connected to the first thermal imager shield cylinder with its own thread; O-rings are installed between the first rear cover and the first thermal imager barrel and between the first rear cover and the first plug screw, and the first plug screw and the first rear cover, as well as the first rear cover and the first thermal imager shield cylinder, are connected to each other with their own threads; a first sunshade is installed on the upper part of the first thermal imager shield cylinder and is fastened with screws.

[0027] The long-wave thermal imager shield component is composed of a second infrared window, a fourth rubber pad, a third infrared window pressure ring, and a fourth infrared window pressure ring, which are installed in sequence in the rear side hole of the third front cover and fastened with screws; the third front cover is connected to the second thermal imager shield cylinder with screws, and an O-ring is installed in the sealing groove at the front end of the second thermal imager shield cylinder; the explosion-proof steel window is installed in the corresponding mounting hole at the front end of the third front cover and fastened with screws; the third rubber pad is installed between the explosion-proof steel window and the second front cover and connected with screws; the connection method between the narrow-band long-wave infrared thermal imager and the second thermal imager shield cylinder and the structural form of the shield component itself are similar to those of the narrow-band medium wave, and most of the components are interchangeable, and the repeated content will not be repeated here.

[0028] The visible light shield component is assembled by the visible light and network switch module in the visible light shield cylinder, and is fastened by studs, nuts and screws. The front and rear positions of the visible light and network switch module on the studs are adjusted by two nuts, and the angle of the optical axis of the visible light and network switch module in the azimuth direction is adjusted. By adjusting the upper and lower positions of the visible light adjustment block in the visible light and network switch module in the visible light shield cylinder, the angle of the optical axis of the visible light and network switch module in the pitch direction can be adjusted to keep the visible light axis consistent with the infrared light axis; the visible light window, the fifth image rubber pad and the visible light window pressure ring are sequentially installed in the third front cover, and the visible light window pressure ring is installed in the third front cover by the visible light adjustment block. The visible light window pressing ring is fastened by its own thread, and the third front cover is connected to the visible light shield cylinder by its own thread; an O-ring is installed in the sealing groove at the front end of the visible light shield cylinder; the third fan is connected to the fill light heat dissipation bracket by screws, and the fill light heat dissipation bracket is firmly bonded to the visible light shield cylinder by epoxy resin; the fill light board is connected to the visible light shield cylinder by screws, and a thermal conductive rubber pad is installed between the fill light board and the fill light heat dissipation bracket, which is used to conduct the heat generated by the fill light to the visible light shield cylinder through the fill light heat dissipation bracket; the fill light shield transition sleeve is firmly bonded to the visible light shield cylinder by epoxy resin; the fill light window, the sixth rubber The rubber pad and the fill light window pressure ring are installed in the third front cover in sequence, and are fastened by the fill light window pressure ring's own thread; the third front cover is installed at the front end of the fill light shield transition sleeve, and is fastened by its own thread; the third slip ring is installed in the second slip ring sleeve, the slip ring stator is firmly bonded to the second slip ring sleeve by epoxy resin, the cavity between the slip ring stator lead and the second slip ring sleeve is filled with epoxy resin, and the thickness of the epoxy resin meets the explosion-proof requirements; the second slip ring sleeve is installed in the rotating shaft of the visible light shield cylinder, and is fastened by the second pitch slip ring pressure ring, the second slip ring sleeve and the visible light shield cylinder adopt clearance fit, and the clearance size and the length of the fitting surface meet the explosion-proof requirements; in the visible light shield, the second slip ring sleeve is installed in the rotating shaft of the visible light shield cylinder, and is fastened by the second pitch slip ring pressure ring, and the second slip ring sleeve and the visible light shield cylinder adopt clearance fit, and the clearance size and the length of the fitting surface meet the explosion-proof requirements; in the visible light shield, the second slip ring sleeve is installed in the rotating shaft of the visible light shield cylinder, and the second slip ring sleeve and the visible light shield cylinder are ... A cylindrical pin is installed in the corresponding pin hole of the visible light shield cylinder, and the cylindrical pin cooperates with the limiting groove of the pitch bearing seat in the pitch component to limit the angular range of the pitch component; an O-ring is installed in the sealing groove at the rear end of the visible light shield cylinder, and the second rear cover is connected to the visible light shield cylinder with its own thread; a wiper component is installed at the front end of the visible light shield cylinder; a second plug screw is provided at the upper end of the visible light shield cylinder, and an O-ring is installed in the sealing groove at the upper end of the visible light shield cylinder, and the second plug screw is fastened to the visible light shield cylinder with its own thread; a second sunshade is installed at the upper end of the visible light shield cylinder and fastened with screws.

[0029] The visible light and network switch module is composed of a visible light component connected to a visible light and network switch mounting plate by screws; the fifth fan is connected to a third fan mounting bracket by screws, and the third fan mounting bracket is connected to the visible light and network switch mounting plate by screws and installed on the side of the visible light component; the visible light adjustment block is connected to the visible light and network switch mounting plate by screws; the visible light / fill light / wiper control panel, the network switch mounting plate, the switch, the fan mounting plate, and the fourth fan are installed on the visible light and network switch mounting plate by studs, nuts, and screws.

[0030] The narrow-band medium-wave infrared thermal imager adopts a cooled 3.2-3.4μm, 320×256 / 30μm, narrow-band focal plane detector, and the infrared optical lens is a continuously variable magnification lens. For different application scenarios, the working band of the thermal imager can be 3.0-3.5μm, 3.0-4.0μm, 4.2-4.4μm, 4.52-4.67μm, and the detector specifications can be 320×240 / 30μm, 640×512 / 15μm, and the infrared optical lens can be a multi-field of view or fixed-focus infrared optical lens. The cooled narrow-band medium-wave detector can be an uncooled narrow-band medium-wave detector or a wide-band uncooled detector plus a narrow-band filter. According to the specific needs of customers, narrow-band medium-wave infrared thermal imagers that are not within the above-specified working bands can also be customized for a specific scene or a specific gas.

[0031] The narrow-band long-wave infrared thermal imager adopts a cooled 8.0-8.6μm, 320×256 / 30μm, narrow-band focal plane detector, and a continuously variable-power infrared optical lens. For different application scenarios, the working band can be 8.0-9.0μm, 8.0-9.2μm, 10.3-10.8μm, and the detector specifications can be 320×240 / 30μm, 640×512 / 15μm, and the infrared optical lens can be a multi-field or fixed-focus infrared optical lens. The thermal imager can also use an uncooled narrow-band detector with a working band of 7.0-8.5, 10.0-11.0μm, or it can be realized by using a wide-band uncooled detector plus a narrow-band filter. The detector specifications can be 320×240 / 34μm, 320×240 / 35μm, 320×240 / 40μm, 384×288 / 34μm, 384×288 / 35μm, 384×288 / 40μm. According to specific customer needs, we can also customize narrow-band long-wave infrared thermal imagers that are not within the above specified working bands for a specific scene or specific gas.

[0032] The first infrared window and the second infrared window are installed at an angle to the infrared optical axis, and their inclination angles to the thermal imaging optical axis should be greater than half of the infrared field of view (fixed-focus lens) or half of the large field of view (continuous zoom or multiple fields of view) to ensure that the stray light generated by cold reflection deviates from the infrared optical lens and prevent the generation of cold reflection.

[0033] The first infrared window is made of sapphire material that is transparent to medium-wave infrared, with a hard carbon film coated on the front surface and an anti-reflection film coated on the back surface. Since the sapphire material itself is relatively hard, in order to reduce energy shielding and allow as much energy as possible to enter the optical system, no explosion-proof steel window is installed in front of the first infrared window; the second infrared window is made of germanium material that is transparent to long waves. Since germanium material is relatively soft, an explosion-proof steel window is installed in front of the window, and the thickness of the steel wire and the density of the grid of the steel window should meet the explosion-proof requirements; the visible light window and the fill light window are made of tempered glass material, and the tempered glass itself is relatively hard, so no explosion-proof steel window is installed in front of the window.

[0034] The first thermal imager shield cylinder and the second thermal imager shield cylinder are made of aluminum alloy with good thermal conductivity to ensure that a large amount of heat generated during the operation of the thermal imager can be quickly dissipated into the atmosphere through the thermal imager shield cylinder. Other shells of the gas leak detector are made of stainless steel.

[0035] The so-called dual-light explosion-proof pan / tilt head can, depending on the needs of the application scenario, only retain the thermal imager as a gas detection sensor, remove the visible light part, and present it in a single infrared manner.

[0036] The beneficial effects of the present invention include:

[0037] 1) Use narrow-band detectors and narrow-band infrared optical lenses, and place the detector filter inside the detector dewar to reduce noise and improve the signal-to-noise ratio;

[0038] 2) The detector window and the infrared thermal imager are installed at a certain angle to remove cold reflections and improve image quality;

[0039] 3) For gas leak detectors using medium-wave cooled thermal imagers, use high-strength sapphire as the infrared window, and do not install explosion-proof steel windows in front of the window to improve the transmittance of the optical system; for gas leak detectors using long-wave cooled thermal imagers, use germanium as the infrared window, and install explosion-proof steel windows in front of the infrared window. For visible light cameras and fill lights, use tempered glass as the window, and do not install explosion-proof steel windows in front of the window;

[0040] 4) The non-uniformity correction mechanism of the infrared thermal imager is installed in front of the lens, which can correct the image non-uniformity caused by the infrared lens and the detector. According to the type of gas to be measured in the application scenario, an infrared thermal imager with a matching working band can be selected to cover most of the gases in the application scenario;

[0041] 5) It can image the gas and the scene in real time, and adopts the dual-light design of infrared and visible light. Infrared is used for gas detection and scene display, and visible light is used for scene display, which makes up for the shortcoming of poor layering of infrared scene images. The visible light is equipped with a fill light, which can be used to fill the visible light at night and in scenes with poor light. When a gas leak occurs, an alarm signal can be issued in time so that the emergency department can take corresponding treatment measures in time;

[0042] 6) Two-degree-of-freedom pan / tilt explosion-proof design, suitable for Zone 1 and Zone 2 locations with explosive mixtures of T1 to T6 groups of flammable and explosive gases and air, and Zone 21 and Zone 22 locations with explosive hazards formed by a mixture of flammable and explosive dust and air, explosion-proof grade Ex dbⅡC T6 Gb / ExⅢC T80℃Db. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 : Appearance diagram of narrow-band medium-wave infrared gas leak detector.

[0044] Figure 2 : Explosion diagram of narrow-band medium-wave infrared gas leak detector.

[0045] Figure 3 : Appearance diagram of narrow-band long-wave infrared gas leak detector.

[0046] Figure 4 : Explosion diagram of narrow-band long-wave infrared gas leak detector.

[0047] Figure 5 : Explosion diagram of a two-axis explosion-proof gimbal without steel windows.

[0048] Figure 6 : Explosion diagram of a two-axis explosion-proof pan / tilt head with steel windows.

[0049] Figure 7 : Exploded view of the orientation components.

[0050] Figure 8 : Orientation component layout diagram.

[0051] Fig. 9 : Exploded view of azimuth drive components.

[0052] Fig.10 : Pitch component layout diagram.

[0053] Fig.11 : Exploded diagram of the pitch drive mechanism.

[0054] Fig.12 : Explosion diagram of medium wave shield components and narrow band medium wave infrared thermal imager.

[0055] Fig.13 : Layout diagram of medium wave shield components and narrow band medium wave infrared thermal imager.

[0056] Fig.14 : Explosion diagram of long-wave shield components and narrow-band long-wave infrared thermal imager.

[0057] Fig.15 : Layout diagram of long-wave shield components and narrow-band long-wave infrared thermal imager.

[0058] Fig.16 : Exploded view of visible light shield components and visible light and network switch module installation.

[0059] Fig.17 : Schematic diagram of the horizontal layout of visible light shield components and visible light and network switch modules.

[0060] Fig.18 : Schematic diagram of the vertical layout of visible light shield components and visible light and network switch modules.

[0061] Fig.19 : Exploded view of visible light and network switch module.

[0062] In the figure:

[0063] Two-axis dual-light explosion-proof pan / tilt without steel window 1, narrow-band medium-wave infrared thermal imager 2, visible light and network switch module 3, two-axis explosion-proof pan / tilt with steel window 4, narrow-band long-wave infrared thermal imager 5, azimuth component 6, medium-wave thermal imager cover component 7, pitch component 8, connecting sleeve 9, first screw 10, visible light cover component 11, second screw 12, first flat washer 13, first elastic washer 14, long-wave cover component 15, third screw 16, second flat washer 17, second elastic washer 18, azimuth drive component 19, locking nut 20, first bearing adjustment gasket 21, fourth screw 22, first gear 23, first worm gear 24, first bearing 25, first O-ring 26, first sleeve 27, first azimuth seat 28, first bearing retaining ring 29, second bearing 30, first bearing pressure ring 31, third bearing 32, second bearing pressure ring 33, first lip seal 34, first key 35, fifth screw 36, third flat washer 37, third elastic washer 38, second azimuth seat 39, explosion-proof socket 40, explosion-proof plug 41, second sleeve 42, first slip ring 43, sixth screw 44, fourth flat washer 45, fourth elastic washer 46, first stud 47, first nut 48, fifth flat washer 49, fifth elastic washer 50, ground wire sign 51, second stud 52, power circuit board 53, servo control board 54, bottom cover 55, main control circuit board 56, seventh screw 57, sixth flat washer 58, sixth elastic washer 59, third stud 60, second O-ring 6 1. Second key 62. First motor 63. Eighth screw 64. Seventh flat washer 65. Seventh elastic washer 66. Ninth screw 67. Eighth flat washer 68. Eighth elastic washer 69. Third bearing pressure ring 70. Second bearing adjustment washer 71. Fourth bearing 72. Tenth screw 73. Ninth flat washer 74. Ninth elastic washer 75. First cylindrical pin 76. Worm bearing seat 77. Pitch interface plate 78. Encoder shaft 79. Eleventh screw 80. Tenth flat washer 81. Tenth elastic washer 82. Fourth bearing pressure ring 83. Fifth bearing 84. Sixth bearing 85. Seventh bearing 86. Second cylindrical pin 87. Twelfth screw 88. Eleventh flat washer 89. Eleventh elastic washer 90. Thirteenth screw 91. Twelfth flat washer 92, the twelfth elastic washer 93, the fourth pulley baffle 94, the second pulley 95, the fourteenth screw 96, the thirteenth flat washer 97, the thirteenth elastic washer 98, the first pulley baffle 99, the first pulley 100, the third pulley baffle 101, the first synchronous belt 102, the second pulley baffle 103, the azimuth motor seat 104, the first worm 105, the fifteenth screw 106, the fourteenth flat washer 107, the fourteenth elastic washer 108, the third key 109, the encoder demodulation plate mounting bracket 110, the second gear 111, the sixteenth screw 112, the fifteenth flat washer 113, the fifteenth elastic washer 114, the seventeenth screw 115, the first encoder demodulation plate 116, the first magnetic encoder chip 117, the second gear pressure plate 118,First optical coupler 119, first magnet 120, first magnet mounting shaft 121, fifth bearing pressing ring 122, main cylinder cover 123, third O-ring 124, main cylinder body 125, eighteenth screw 126, sixteenth flat washer 127, sixteenth elastic washer 128, fourth stud 129, pitch drive component 130, pitch bearing seat 131, second lip sealing ring 132, eighth bearing 133, third sleeve 134, third bearing adjustment shim 135, ninth bearing 136, nineteenth screw 137, seventeenth flat washer 138, seventeenth elastic washer 139, bearing spacer 140, third gear 141, third key 142, second worm gear 143, worm gear pressing ring 144, sixth bearing pressing ring 145, tenth bearing 146, fourth shaft sleeve 147, eleventh bearing 148, third lip seal 149, twentieth screw 150, eighteenth flat washer 151, eighteenth elastic washer 152, first image processing board 153, second image processing board 154, twenty-first screw 155, nineteenth flat washer 156, nineteenth elastic washer 157, fifth pulley baffle 158, second synchronous belt 159, third pulley 160, sixth pulley baffle 161, twenty-second screw 162, twentieth flat washer 163, twentieth elastic washer 164, seventh pulley baffle 165, fourth pulley 166, eighth pulley baffle 167, twenty-third screw 168, twentieth flat washer 169, twentieth elastic washer 170, second encoder demodulation Plate 171, second magnetic encoder chip 172, second magnet 173, third gear pressure plate 174, second optical coupler 175, fourth gear 176, fourth key 177, twenty-fourth screw 178, twenty-first flat washer 179, twenty-first elastic washer 180, second motor 181, twenty-fifth screw 182, twenty-second flat washer 183, twenty-second elastic washer 184, seventh bearing pressure ring 185, fourth adjustment shim 186, eleventh bearing 187, second worm 188, pitch motor seat 189, fifth key 190, twelfth bearing 191, thirteenth bearing 192, second bearing clamp 193, fourteenth bearing 194, pitch encoder bearing pressure plate 195, twenty-sixth screw 196, second magnet Installation shaft 197, first front cover 198, first infrared window 199, first rubber pad 200, first infrared window pressing ring 201, second infrared window pressing ring 202, twenty-seventh screw 203, twenty-third flat washer 204, twenty-third elastic washer 205, twenty-eighth screw 206, twenty-fourth flat washer 207, twenty-fourth elastic washer 208, twenty-ninth screw 209, twenty-fifth flat washer 210, twenty-fifth elastic washer 211, thirtieth screw 212, twenty-sixth flat washer 213, twenty-sixth elastic washer 214, first fan mounting bracket 215, thermal imaging mounting plate 216, first fan 217, thirty-first screw 218, twenty-seventh flat washer 219, twenty-seventh elastic washer 220,32nd screw 221, 28th flat washer 222, 28th elastic washer 223, 33rd screw 224, 29th flat washer 225, 29th elastic washer 226, 34th screw 227, 30th flat washer 228, 30th elastic washer 229, second fan mounting bracket 230, second fan 231, fourth O-ring 232, first thermal imager shield cylinder 233, second rubber washer 234, first pitch slip ring pressure ring 235, second slip ring 236, first slip ring sleeve 237, 35th screw 238, first pitch axis 239, first pitch axis pressure ring 240, fifth O-ring 241, first rear cover 242, sixth O-ring 243, first plug screw 244 , the first sunshade 245, the thirty-sixth screw 246, the thirty-first flat washer 247, the thirty-first elastic washer 248, the thirty-seventh screw 249, the thirty-second flat washer 250, the thirty-second elastic washer 251, the second front cover 252, the third rubber pad 253, the thirty-eighth screw 254, the explosion-proof steel window 255, the thirty-ninth screw 256, the third front cover 257, the second infrared window 258, the fourth rubber pad 259, the third infrared window pressure ring 260, the fourth infrared window pressure ring 261, the fortieth screw 262, the thirty-third flat washer 263, the thirty-third elastic washer 264, the sixth O-ring 265, the second thermal imager shield cylinder 266, the third front cover 267, the visible light window 268, the fifth image Rubber pad 269, visible light window pressure ring 270, stud 271, 34th flat washer 272, 34th elastic washer 273, second nut 274, third front cover 275, fill light window 276, sixth rubber pad 277, fill light window pressure ring 278, fill light shield transition sleeve 279, 41st screw 280, 35th flat washer 281, 35th elastic washer 282, fill light board 283, thermal conductive rubber pad 284, third fan 285, 42nd screw 286, 36th flat washer 287, 36th elastic washer 288, fill light heat dissipation bracket 289, visible light shield cylinder 290, second pitch slip ring pressure ring 291, third slip ring 292, second slip ring sleeve 293, 44th screw 284, 36th screw 286, 37th flat washer 287, 37th elastic washer 288, fill light heat dissipation bracket 289, visible light shield cylinder 290, second pitch slip ring pressure ring 291, third slip ring 292, second slip ring sleeve 293, 45th screw 284, 36th screw 286, 37th flat washer 287, 37th elastic washer 288, fill light heat dissipation bracket 289, visible light shield cylinder 290, second pitch slip ring pressure ring 291, third slip ring 292, second slip ring sleeve 293, 46th screw 284, 36th screw 286, 37th flat washer 287, 37th elastic washer 288, fill light heat dissipation bracket 289, visible light shield cylinder 294, 36th screw 286, 37th three cylindrical pins 294, seventh O-ring 295, second back cover 296, forty-third screw 297, thirty-seventh flat washer 298, thirty-seventh elastic washer 299, wiper component 300, eighth O-ring 301, second sunshade 302, forty-fourth screw 303, thirty-eighth flat washer 304, thirty-eighth elastic washer 305, second plug screw 306, ninth O-ring 307, visible light component 308, visible light and network switch mounting plate 309, forty-fifth screw 310, thirty-ninth flat washer 311, thirty-ninth elastic washer 312, forty-sixth screw 313, fortieth flat washer 314, fortieth elastic washer 315, fifth stud 316, forty-seventh screw 317,a 41st flat washer 318, a 42nd elastic washer 319, a visible light adjustment block 320, a 48th screw 321, a 42nd flat washer 322, a 42nd elastic washer 323, a visible light / fill light / wiper control board 324, a 6th stud 325, a network switch mounting plate 326, a 49th screw 327, a 43rd flat washer 328, a 43rd elastic washer 329, a 7th stud 330, a 3rd nut 331, a 44th flat washer 332, The forty-fourth elastic washer 333, the eighth stud 334, the switch 335, the fiftieth screw 336, the forty-fifth flat washer 337, the forty-fifth elastic washer 338, the fourth fan 339, the switch fan mounting plate 340, the fourth nut 341, the forty-sixth flat washer 342, the forty-sixth elastic washer 343, the fifty-first screw 344, the forty-seventh flat washer 345, the forty-seventh elastic washer 346, the fifth fan 347, and the third fan mounting bracket 348. DETAILED DESCRIPTION

[0064] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0065] In one embodiment of the present invention, the narrow-band medium-wave infrared gas leak detector has an appearance as follows: Figure 1 As shown, the implementation method is as follows Figure 2 As shown, the gas leak detector consists of a two-axis dual-light explosion-proof pan-tilt without a steel window 1, a narrow-band medium-wave infrared thermal imager 2, and a visible light and network switch module 3. The narrow-band medium-wave infrared thermal imager 2 and the visible light and network switch module 3 are respectively installed in the thermal imager shield cylinder and the visible light shield cylinder of the two-axis dual-light explosion-proof pan-tilt without a steel window 1, and are fastened with screws. The appearance of the narrow-band long-wave infrared gas leak detector is as follows Figure 3 As shown, the implementation method is as follows Figure 4 As shown, the gas leak detector consists of a two-axis dual-light explosion-proof pan-tilt head 4 with a steel window, a narrow-band long-wave infrared thermal imager 5, and a visible light and network switch module 3. The narrow-band long-wave infrared thermal imager 5 and the visible light and network switch module 3 are respectively installed in the thermal imager shield cylinder and the visible light shield cylinder of the two-axis dual-light explosion-proof pan-tilt head 4 with a steel window, and are fastened with screws.

[0066] like Figure 5As shown, the two-axis dual-light explosion-proof pan / tilt head 1 without steel windows is composed of an azimuth component 6, a pitch component 8, a medium-wave thermal imaging shield component 7, a visible light shield component 11, and a coupling sleeve 9, wherein the pitch component 8 is connected to the azimuth component 6 by a second screw 12, a first flat washer 13, and a first elastic washer 14 to form an azimuth axis system of the two-axis dual-light explosion-proof pan / tilt head 1 without steel windows, and the medium-wave thermal imaging shield component 7 and the visible light shield component 11 are connected to the pitch component 8 by a coupling sleeve 9 and a first screw 10 to form a pitch axis system of the two-axis dual-light explosion-proof pan / tilt head 1 with steel windows.

[0067] like Figure 6 As shown, the two-axis dual-light explosion-proof pan / tilt platform 4 with steel windows is composed of an azimuth component 6, a pitch component 8, a long-wave thermal imaging shield component 15, a visible light shield component 11, and a coupling sleeve 9, wherein the pitch component 8 is connected to the azimuth component 6 by a second screw 12, a first flat washer 13, and a first elastic washer 14 to form an azimuth axis system of the two-axis dual-light explosion-proof pan / tilt platform 1 with steel windows, and the long-wave thermal imaging shield component 15 and the visible light shield component 11 are connected to the pitch component 8 by a coupling sleeve 9 and a first screw 10 to form a pitch axis system of the two-axis dual-light explosion-proof pan / tilt platform 1 with steel windows.

[0068] like Figure 7As shown, the third bearing 32 is installed in the inner hole of the first azimuth seat 28 and is fastened by the second bearing pressure ring 33. The shaft at the upper end of the second azimuth seat 39 is installed in the inner hole of the third bearing 32 and is fastened by the first bearing pressure ring 31. The first lip seal ring 34 is installed on the lower side of the third bearing 32, and its outer diameter contacts the inner hole of the first azimuth seat 28, and its inner diameter contacts the outer diameter of the shaft of the second azimuth seat 39, forming a dynamic seal of the azimuth component. The first O-ring 26 is installed in the sealing groove on the upper end face of the mounting flange of the first azimuth seat 28, and forms a static seal with the pitch component 8. The first shaft sleeve 27 is installed in the inner hole of the first azimuth seat 28, and its outer cylindrical surface is clearance matched with the inner hole of the first azimuth seat 28, and its inner cylindrical surface is clearance matched with the outer surface of the shaft of the second azimuth seat 39, and the clearance of the fitting surface is 1. and length meet the explosion-proof requirements; the first bearing 25 is installed in the inner hole at the upper end of the first azimuth seat 28, the outer ring of the bearing is in contact with the first sleeve 27, and the inner ring is suspended; the first worm wheel 24, the first gear 23, and the first bearing adjustment gasket 21 are installed in sequence on the upper end of the first bearing 25, and are locked with the locking nut 20. The first bearing adjustment gasket 21 is used to eliminate the axial clearance between the third bearing 32 and the first bearing 25 to ensure that the bearing can rotate flexibly when the locking nut 20 is tightened; the first key 35 is installed in the keyway of the second azimuth seat 39 and the first worm wheel 24 to ensure that the second azimuth seat 39 rotates synchronously with the first worm wheel 24; the first gear 23 is fastened to the first worm wheel 24 with the fourth screw 22; the second bearing 30 is installed on the upper end of the second azimuth seat 39 The first bearing retaining ring 29 is used to limit the axial movement of the second bearing 30 to prevent the bearing from slipping out; the first slip ring 43 is installed in the second sleeve 42, and the gap between the slip ring stator and the inner hole of the second sleeve 42 is filled with epoxy resin. The second sleeve 42 is installed in the inner hole on the lower side of the second azimuth seat 39. The second sleeve 42 and the second azimuth seat 39 are clearance-matched. The size of the gap and the length of the fitting surface meet the flameproof requirements. The first slip ring 43 is fastened to the second azimuth seat 39 by the sixth screw 44, the fourth flat washer 45, and the fourth elastic washer 46; the rotor lead of the first slip ring 43 is led out from the second bearing 30 to prevent the slip ring rotor lead from being damaged during the long-term rotation of the pan-tilt head; the azimuth drive component 19 is installed at the upper end of the first azimuth seat 28, The inner hole at the upper end of the first azimuth seat 28 is used for positioning, and the third screw 16, the second flat washer 17, and the second elastic washer 18 are used to fasten the first azimuth seat 28; the first worm 105 of the azimuth drive component 19 is meshed with the first worm wheel 24 to provide power for the rotation of the azimuth component 6; the power supply circuit board 53, the servo control board 54, and the main control circuit board 56 are installed in the inner cavity on the lower side of the second azimuth seat 39, and are fastened by the first stud 47, the second stud 52, the third stud 60, the seventh screw 57, the sixth flat washer 58, and the sixth elastic washer 59; the second O-ring 61 is installed in the sealing groove on the upper end surface of the bottom cover 55, and the bottom cover 55 is installed on the lower side of the second azimuth seat 39, and is fastened by the fifth screw 36, the third flat washer 37, and the third elastic washer 38;The first nut 48, the fifth flat washer 49, the fifth elastic washer 50, and the ground wire sign 51 are installed on the inner and outer terminals of the upper end surface of the bottom cover 55, and are used to connect the pan / tilt to the chassis ground and the earth; the explosion-proof socket 40 is connected to the socket installation hole on the lower side of the second azimuth seat 39, and the gap between the explosion-proof socket 40 and the second azimuth seat 39 and the lead wires in the socket are filled with epoxy resin to ensure the explosion-proof requirements; the explosion-proof plug 41 is in contact with the explosion-proof socket 40, and is used for electrical cross-linking between the gas leak detector and the outside world. ; Figure 8 It is the layout diagram of the orientation component 6.

[0069] like Fig. 9As shown, the worm bearing seat 77 and the azimuth motor seat 104 are connected to the pitch interface plate 78 through the tenth screw 73, the ninth flat washer 74, the ninth elastic washer 75 and the twelfth screw 88, the eleventh flat washer 89, and the eleventh elastic washer 90, respectively, and are positioned by the first cylindrical pin 76 and the second cylindrical pin 87; one side of the first worm 105 is installed in the seventh bearing 86 and the other side is installed in the fourth bearing 72, the seventh bearing 86 is installed in the bearing mounting hole at the lower part of the azimuth motor seat 104, the end face of the outer ring of the bearing contacts with the inner hole shoulder of the azimuth motor seat 104, and the inner ring of the bearing contacts with the shoulder of the first worm 105; the fourth bearing 72 is installed in the bearing mounting hole of the worm bearing seat 77, and the second bearing adjustment gasket 71 and the third bearing pressure ring are used to adjust the bearing. 70 is fastened, the second bearing adjustment gasket 71 is used to adjust the bearing axial clearance between the seventh bearing 86 and the fourth bearing 72. When the bearing clearance is eliminated, the bearing can rotate flexibly. The third bearing pressure ring 70 is fastened to the worm bearing seat 77 by using the ninth screw 67, the eighth flat washer 68, and the eighth elastic washer 69; the third pulley baffle 101 and the fourth pulley baffle 94 are installed on both sides of the second pulley 95 to prevent the first synchronous belt 102 from sliding off the second pulley 95 during movement. The third pulley baffle 101, the second pulley 95, and the fourth pulley baffle 94 are sequentially installed on the shaft of the first worm 105, and are fastened to the first worm 105 by using the thirteenth screw 91, the twelfth flat washer 92, and the twelfth elastic washer 93. The third key 109 is installed In the keyway of the first worm 105, the third pulley baffle 101, the second pulley 95 and the fourth pulley baffle 94, ensure that the first worm 105 and the second pulley 95 rotate synchronously; the first motor 63 is installed in the mounting hole corresponding to the azimuth motor seat 104, and the outer circle of the motor mounting hole of the azimuth motor seat 104 is used for circumferential positioning, and the azimuth motor seat 104 is connected with the eighth screw 64, the seventh flat washer 65 and the seventh elastic washer 66; the second pulley baffle 103, the first pulley 100 and the first pulley baffle 99 are installed on the motor shaft of the first motor 63 in sequence, and are fastened with the fourteenth screw 96, the thirteenth flat washer 97 and the thirteenth elastic washer 98, and the second key 62 is installed on the motor shaft of the first motor 63 and the second pulley baffle 103, the first pulley 100, and the keyway of the first pulley baffle 99, ensuring that the first motor 63 and the first pulley 100 can rotate synchronously; the first synchronous belt 102 is installed on the first pulley 100 and the second pulley 95, and is used to transmit the rotation of the first motor 63 to the first worm 105, so as to provide power for the azimuth driving component 19; the encoder shaft 79 is installed in the corresponding hole of the pitch interface plate 78, and is fastened by the eleventh screw 80, the tenth flat washer 81, and the tenth elastic washer 82; the fifth bearing 84 and the sixth bearing 85 are installed in the hole at the upper end of the encoder shaft 79, and are fastened by the fifth bearing pressure ring 122; the first magnet mounting shaft 121 is installed in the inner hole of the fifth bearing 84 and the sixth bearing 85, and is fastened by the fourth bearing pressure ring 83;The second gear 111 is mounted on the shaft at the upper end of the first magnet mounting shaft 121 and is fastened by the second gear pressing plate 118. The second gear pressing plate 118 is fastened to the first magnet mounting shaft 121 by the seventeenth screw 115. The second gear pressing plate 118 is provided with a vertical plate in the circumference, and the vertical plate cooperates with the first optical coupler 119 mounted on the first encoder demodulation plate 116 to set the rotation zero position of the orientation component 6. The first magnet 120 is mounted in the mounting hole in the middle of the upper end of the first magnet mounting shaft 121 and is firmly bonded with epoxy resin. The center of the first magnetic encoder chip 117 mounted on the first encoder demodulation plate 116 is facing the central axis of the first magnet 120. During the rotation of the first magnet mounting shaft 121 , the first magnetic encoder chip 117 can calculate the rotation angle of the first magnet mounting shaft 121 in real time; the second gear 111 is meshed with the first gear 23 in the azimuth component 6, and the rotation is synchronously transmitted to the first magnet mounting shaft 121 while the first worm 105 drives the first worm wheel 24, which is used to measure the angular position of the pitch component 8 in the azimuth component 6 in real time; the first encoder demodulation board 116 is fixed to the encoder demodulation board mounting frame 110 by the sixteenth screw 112, the fifteenth flat washer 113, and the fifteenth elastic washer 114, and the encoder demodulation board mounting frame 110 is connected to the pitch interface board 78 by the fifteenth screw 106, the fourteenth flat washer 107, and the fourteenth elastic washer 108. ;

[0070] like Fig.10As shown, pitch bearing seats 131 are installed on the left and right sides of the main cylinder 125, and the pitch bearing seat 131 and the main cylinder 125 are connected by welding; the third sleeve 134 is installed in the pitch bearing seat 131 on the left side, the eighth bearing 133 and the ninth bearing 136 are installed on both sides of the third sleeve 134 respectively, and the medium-wave thermal imaging shield component 7 is installed in the eighth bearing 133, the ninth bearing 136 and the inner hole of the third sleeve 134. The third sleeve 134 and the pitch bearing seat 131 and the medium-wave thermal imaging shield component 7 and the third sleeve 134 are clearance-matched, and the clearance size and the matching length meet the explosion-proof requirements; the second lip seal ring 132 is installed on the outer side of the eighth bearing 133, and the outer circle is in the inner hole of the pitch bearing seat 131 The inner hole contacts the outer circle of the medium-wave thermal imaging shield component 7; the third bearing adjustment gasket 135, the bearing spacer 140, the third gear 141, and the second worm gear 143 are sequentially mounted on the shaft of the medium-wave thermal imaging shield component 7 and fastened with the worm gear pressure ring 144. The third bearing adjustment gasket 135 is used to adjust the axial clearance between the eighth bearing 133 and the ninth bearing 136; the third key 142 is mounted in the keyway of the third gear 141, the second worm gear 143 and the medium-wave thermal imaging shield component 7 to ensure that the third gear 141, the second worm gear 143 and the medium-wave thermal imaging shield component 7 rotate synchronously; the fourth shaft sleeve 147 is mounted in the pitch bearing seat 131 on the right side, and the tenth bearing 146 and the eleventh bearing 148 are respectively mounted on the first and second bearings. On both sides of the fourth sleeve 147, the visible light shield component 11 is installed in the inner holes of the tenth bearing 146, the eleventh bearing 148 and the fourth sleeve 147, and the fourth sleeve 147 and the pitch bearing seat 131 and the visible light shield component 11 and the fourth sleeve 147 are clearance-matched, and the clearance size and the fitting length meet the explosion-proof requirements; the visible light shield component 11 is fastened to the tenth bearing 146 by the sixth bearing pressure ring 145, and the third bearing adjustment gasket 135 is used to adjust the axial clearance between the tenth bearing 146 and the eleventh bearing 148; the third lip seal ring 149 is installed on the outer side of the eleventh bearing 148, and the outer circle contacts the inner hole of the pitch bearing seat 131, and the inner hole contacts the visible light shield component 11; the second lip seal ring 13 2. The third lip seal ring 149 constitutes the dynamic seal of the pan / tilt component 8; the medium-wave thermal imaging shield component 7 and the visible light shield component 11 are connected and fastened by the coupling sleeve 9 and the first screw 10, and the first screws 10 on both sides are respectively installed in the keyways of the rotating shafts of the medium-wave thermal imaging shield component 7 and the visible light shield component 11, and the keyway width is consistent with the outer diameter of the first screw 10, so as to ensure that the rotation angles of the medium-wave thermal imaging shield component 7 and the visible light shield component 11 are consistent; the pitch drive component 130 is connected to the pitch bearing seat 131 and the main cylinder 125 by the nineteenth screw 137, the seventeenth flat washer 138, the seventeenth elastic washer 139 and the twentieth screw 150, the eighteenth flat washer 151, and the eighteenth elastic washer 152;The fourth gear 176 of the pitch driving component 130 is meshed with the third gear 141, and the second worm 188 of the pitch driving component 130 is meshed with the second worm gear 143; the first image processing board 153, the second image processing board 154, are connected to the main cylinder 125 by using the fourth stud 129, the eighteenth screw 126, the sixteenth flat washer 127, and the sixteenth elastic washer 128; the main cylinder cover 123 is connected to the main cylinder 125 by using its own thread, and the third O-ring 124 is installed in the sealing groove on the upper end surface of the main cylinder 125, which is used for static sealing between the main cylinder cover 123 and the main cylinder 125.;

[0071] like Fig.11As shown, the fourteenth bearing 194 and the eleventh bearing 187 are respectively installed in the corresponding bearing holes of the pitch motor seat 189, the second worm 188 is installed in the inner holes of the fourteenth bearing 194 and the eleventh bearing 187, the outer ring of the fourteenth bearing 194 contacts the step of the corresponding bearing hole of the pitch motor seat 189, the inner ring contacts the shaft shoulder of the second worm 188, the inner ring of the eleventh bearing 187 contacts the shaft shoulder of the second worm 188, the outer ring contacts the fourth adjusting gasket 186, the fourth adjusting gasket 186 is used to adjust the axial clearance of the fourteenth bearing 194 and the eleventh bearing 187, the eleventh bearing 187 is fastened by the seventh bearing pressing ring 185, and the seventh bearing pressing ring 185 is fastened by the twenty-fifth screw 182 and the twenty-second screw 184. The flat washer 183 and the twenty-second elastic washer 184 are connected to the pitch motor seat 189; the sixth pulley baffle 161, the third pulley 160, and the fifth pulley baffle 158 are sequentially mounted on the second worm 188 shaft, and are fastened by the twenty-first screw 155, the nineteenth flat washer 156, and the nineteenth elastic washer 157; the fifth key 190 is mounted in the sixth pulley baffle 161, the third pulley 160, the fifth pulley baffle 158 and the keyway of the second worm 188 to ensure that the third pulley 160 rotates synchronously with the second worm 188; the second motor 181 is mounted in the corresponding mounting hole of the pitch motor seat 189, and is fastened by the twenty-fourth screw 178, the twenty-first flat washer 179, and the twenty-first elastic washer 180; the eighth The pulley baffle 167, the fourth pulley 166, and the seventh pulley baffle 165 are sequentially mounted on the shaft of the second motor 181, and are fastened by the 22nd screw 162, the 20th flat washer 163, and the 20th elastic washer 164. The fourth key 177 is installed in the keyway of the eighth pulley baffle 167, the fourth pulley 166, the seventh pulley baffle 165, and the second motor 181 to ensure that the fourth pulley 166 rotates synchronously with the rotating shaft of the second motor 181; the second synchronous belt 159 is installed on the fourth pulley 166 and the third pulley 160 to ensure that the fourth pulley 166 and the third pulley 160 rotate synchronously; the twelfth bearing 191 and the thirteenth bearing 192 are installed in the corresponding bearing holes of the pitch motor seat 189, and the pitch encoder shaft is used to rotate synchronously. The pressure plate 195 is fastened, and the pitch encoder bearing pressure plate 195 is connected to the pitch motor seat 189 by the twenty-sixth screw 196; the second magnet mounting shaft 197 is mounted in the twelfth bearing 191 and the thirteenth bearing 192, and is fixed by the second bearing clamp ring 193; the fourth gear 176 is mounted on the second magnet mounting shaft 197, meshed with the third gear 141 of the pitch component 8, and fastened by the third gear pressure plate 174; the third gear pressure plate 174 is provided with a vertical plate in the circumference, and the vertical plate cooperates with the second optical coupler 175 mounted on the second encoder demodulation plate 171 to provide a zero position for the pitch drive component 130; the second magnet 173 is mounted in the mounting hole at the center of the second magnet mounting shaft 197, and is firmly bonded by epoxy resin;The second magnet 173 is aligned with the center of the second magnetic encoder chip 172 mounted on the second encoder demodulation board 171, and is used to measure the angular position of the second magnet mounting shaft 197 in real time; the second encoder demodulation board 171 is connected to the pitch motor seat 189 by the 23rd screw 168, the 20th flat washer 169, and the 20th elastic washer 170. ;

[0072] like Fig.12As shown, the thermal imaging mounting plate 216 and the second fan mounting frame 230 are connected to the mounting base plate of the narrow-band medium-wave infrared thermal imager 2 by means of the twenty-eighth screw 206, the twenty-fourth flat washer 207, the twenty-fourth elastic washer 208 and the thirty-second screw 221, the twenty-eighth flat washer 222, and the twenty-eighth elastic washer 223. The second fan 231 is connected to the second fan mounting frame 230 by means of the thirty-third screw 224, the twenty-ninth flat washer 225, and the twenty-ninth elastic washer 226. The narrow-band medium-wave infrared thermal imager 2 equipped with the thermal imaging mounting plate 216, the second fan mounting frame 230, and the second fan mounting frame 230 is installed as a whole in the first thermal imager shield cylinder 233, and is connected to the second fan mounting frame 230 by means of the twenty-ninth screw 209, the twenty-fifth flat washer The first fan 217 is connected to the first fan mounting bracket 215 by means of the 31st screw 218, the 27th flat washer 219 and the 27th elastic washer 220. The first fan mounting bracket 215 and the first fan 217 are installed as a whole at the bottom of the narrow-band medium-wave infrared thermal imager 2 and are connected to the first thermal imager shield cylinder 233 by means of the 30th screw 212, the 26th flat washer 213 and the 26th elastic washer 214. The first infrared window 199, the first rubber pad 200, the first infrared window pressing ring 201 and the second infrared window pressing ring 202 are installed in sequence on the first front cover 198. The first front cover 198 is provided with the first infrared window 199, the first rubber pad 200, the first infrared window pressure ring 201, and the second infrared window pressure ring 202, and is connected to the first thermal imager shield cylinder 233 by its own thread, and the fourth O-ring 232 is installed in the sealing groove at the front end of the first thermal imager shield cylinder 233, one side of which is in contact with the first thermal imager shield cylinder 233, and the other side is in contact with the first front cover 198; the second slip ring 236 is installed in the first slip ring sleeve 237, and the slip ring stator and the inner hole clearance of the first slip ring sleeve 237 are matched, and are firmly bonded with epoxy resin, and the slip ring stator lead wire and the first slip ring sleeve 237 are connected. The cavity is filled with epoxy resin, and the thickness of the epoxy resin meets the flameproof requirements. The first slip ring sleeve 237 is installed in the first pitch shaft 239, with clearance fit, and is fastened by the first pitch slip ring pressing ring 235. The size of the clearance and the length of the fitting surface between the first slip ring sleeve 237 and the first pitch shaft 239 meet the flameproof requirements. The second rubber pad 234 is installed between the first thermal imager shield cylinder 233 and the first pitch shaft 239, and the first pitch shaft 239 is connected to the first thermal imager shield cylinder 233 by the thirty-fifth screw 238; the first pitch shaft pressing ring 240 is installed outside the first pitch shaft 239, and is connected to the first thermal imager shield cylinder 233 by its own thread, and the inner end surface of the first pitch shaft pressing ring 240 contacts the shaft shoulder of the first pitch shaft 239;The sixth O-ring 243 is installed in the sealing groove of the rear end face of the first rear cover 242. The first plug screw 244 is connected to the first rear cover 242 through its own thread. One side of the sixth O-ring 243 contacts the first rear cover 242 and the other side contacts the first plug screw 244. The fifth O-ring 241 is installed in the sealing groove of the rear end of the first thermal imager shield cylinder 233. The first rear cover 242 is connected to the first thermal imager shield cylinder 233 through its own thread. One side of the fifth O-ring 241 contacts the first thermal imager shield cylinder 233 and the other side contacts the first rear cover 242. The first sunshade 245 is installed on the upper part of the first thermal imager shield cylinder 233 and is connected to the first thermal imager shield cylinder 233 through the thirty-sixth screw 246, the thirty-first flat washer 247 and the thirty-first elastic washer 248. Fig.13 Layout diagram of medium wave shield components and narrow band medium wave infrared thermal imager

[0073] like Fig.14 As shown, the second infrared window 258, the fourth rubber pad 259, the third infrared window pressing ring 260, and the fourth infrared window pressing ring 261 are sequentially installed in the rear hole of the third front cover 257, and are fastened by the 40th screw 262, the 33rd flat washer 263, and the 33rd elastic washer 264; the third front cover 257 is connected to the second thermal imager shield cylinder 266 by the 39th screw 256, and the sixth O-ring 265 is installed in the front end sealing groove of the second thermal imager shield cylinder 266, one side of which is in contact with the second thermal imager shield cylinder 266, and the other side is in contact with the third front cover 257 contact; the explosion-proof steel window 255 is installed in the corresponding mounting hole at the front end of the third front cover 257 and is fastened by the thirty-eighth screw 254; the third rubber pad 253 is installed between the explosion-proof steel window 255 and the second front cover 252, and the second front cover 252 is connected to the third front cover 257 by the thirty-seventh screw 249, the thirty-second flat washer 250, and the thirty-second elastic washer 251; the connection method between the narrow-band long-wave infrared thermal imager 5 and the second thermal imager shield cylinder 266 and the structural form of the shield component itself are similar to those of the narrow-band medium wave, and most of the components are interchangeable, and the repeated content will not be repeated here. Fig.15 This is the layout diagram of the long-wave shield components and narrow-band long-wave infrared thermal imager.

[0074] like Fig.16As shown, the visible light and network switch module 3 is installed in the visible light shield cylinder 290, and is fastened by using the stud 271, the thirty-fourth flat washer 272, the thirty-fourth elastic washer 273, the second nut 274 and the forty-third screw 297, the thirty-seventh flat washer 298, and the thirty-seventh elastic washer 299. The two second nuts 274 are used to lock the visible light and network switch module 3 in the front and rear positions of the stud 271, and the angle of the optical axis of the visible light and network switch module 3 in the azimuth direction can be adjusted. By adjusting the upper and lower positions of the visible light adjustment block 320 of the visible light and network switch module 3 on the visible light shield cylinder 290, the angle of the optical axis of the visible light and network switch module 3 in the pitch direction can be adjusted. The fine adjustment of the machine module 3 in azimuth and elevation can make the visible light axis consistent with the infrared light axis, so that the infrared and visible light observe the same place; the visible light window 268, the fifth rubber pad 269, and the visible light window pressing ring 270 are installed in the third front cover 267 in sequence, and the visible light window pressing ring 270 is tightened by the thread on the body, and the third front cover 267 is connected to the visible light shield cylinder 290 by its own thread, and the eighth O-ring 301 is installed in the front end sealing groove of the visible light shield cylinder 290, one side is in contact with the visible light shield cylinder 290, and the other side is in contact with the third front cover 267; the third fan 285 is connected to the fill light heat dissipation bracket 289 by the forty-second screw 286, the thirty-sixth flat washer 287, and the thirty-sixth elastic washer 288 The fill light heat dissipation bracket 289 is firmly bonded to the visible light shield cylinder 290 by epoxy resin; the fill light board 283 is connected to the visible light shield cylinder 290 by the forty-first screw 280, the thirty-fifth flat washer 281, and the thirty-fifth elastic washer 282; the thermal conductive rubber pad 284 is installed between the fill light board 283 and the fill light heat dissipation bracket 289, and is used to conduct the heat generated by the fill light board 283 to the visible light shield cylinder 290 through the fill light heat dissipation bracket 289; the fill light shield transition sleeve 279 is firmly bonded to the visible light shield cylinder 290 by epoxy resin; the fill light window 276, the sixth rubber pad 277, and the fill light window pressing ring 278 are installed in the third front cover 275 in sequence, and the fill light window pressing ring 278 is used to connect the fill light board 283 and the fill light heat dissipation bracket 289 to the visible light shield cylinder 290. The third front cover 275 equipped with a fill light window 276, a sixth rubber pad 277, and a fill light window pressure ring 278 is installed at the front end of the fill light shield transition sleeve 279 and is fastened with its own thread; the third slip ring 292 is installed in the second slip ring sleeve 293, the slip ring stator is firmly bonded to the second slip ring sleeve 293 with epoxy resin, and the cavity between the slip ring stator lead and the second slip ring sleeve 293 is filled with epoxy resin, and the thickness of the epoxy resin meets the flameproof requirements; the second slip ring sleeve 293 is installed in the shaft of the visible light shield cylinder 290, and is fastened with the second pitch slip ring pressure ring 291, and the second slip ring sleeve 293 and the visible light shield cylinder 290 are clearance-matched, and the size of the clearance and the length of the fitting surface meet the flameproof requirements;The third cylindrical pin 294 is installed in the corresponding pin hole of the visible light shield cylinder 290, and cooperates with the limit groove of the pitch bearing seat 131 in the pitch component to limit the rotation angle range of the pitch component; the seventh O-shaped sealing ring 295 is installed in the sealing groove at the rear end of the visible light shield cylinder 290, and the second rear cover 296 is connected to the visible light shield cylinder 290 by its own thread. One side of the seventh O-shaped sealing ring 295 contacts the visible light shield cylinder 290, and the other side contacts the second rear cover 296; the wiper component 300 is installed on the visible light shield cylinder 2 90; the ninth O-shaped sealing ring 307 is installed in the sealing groove at the plug hole at the upper end of the visible light shield cylinder 290, and the second plug screw 306 is connected to the visible light shield cylinder 290 through its own thread. One side of the ninth O-shaped sealing ring 307 contacts the visible light shield cylinder 290, and the other side contacts the second plug screw 306; the second sunshade 302 is installed on the upper end of the visible light shield cylinder 290, and is fastened by the forty-fourth screw 303, the thirty-eighth flat washer 304, and the thirty-eighth elastic washer 305.; Fig.17 This is a schematic diagram of the horizontal layout of the visible light shield components and the visible light and network switch modules. Fig.18 It is a schematic diagram of the vertical layout of the visible light shield components and the visible light and network switch modules.

[0075] like Fig.19As shown, the visible light component 308 is connected to the visible light and network switch mounting plate 309 by using the forty-fifth screw 310, the thirty-ninth flat washer 311, and the thirty-ninth elastic washer 312; the fifth fan 347 is connected to the third fan mounting bracket 348 by using the fifty-first screw 344, the forty-seventh flat washer 345, and the forty-seventh elastic washer 346; the third fan mounting bracket 348 is connected to the visible light and network switch mounting plate 309 by using the forty-sixth screw 313, the fortieth flat washer 314, and the fortieth elastic washer 315, and is installed on the side of the visible light component 308; the visible light adjustment block 320 is connected to the visible light and network switch mounting plate 309 by using the forty-eighth screw 321, the forty-second flat washer 322, and the forty-second elastic washer 323; the fifth stud 316 is installed on the visible light and network switch mounting plate 309, and is installed by using the forty-seventh screw 317, the forty-first flat washer The visible light / fill light / wiper control panel 324 is mounted on the fifth stud 316 and fastened by the sixth stud 325; the network switch mounting plate 326 is mounted on the sixth stud 325 and fastened by the seventh stud 330; the switch 335 is mounted on the seventh stud 330 and fastened by the nut 331, the forty-fourth flat washer 332 and the forty-fourth elastic washer 333; the eighth stud 334 is mounted on the switch 335 and fastened by the forty-ninth screw 327, the forty-third flat washer 328 and the forty-third elastic washer 329; the fan mounting plate 340 is mounted on the eighth stud 334 and fastened by the fourth nut 341, the forty-sixth flat washer 342 and the forty-sixth elastic washer 343; the fourth fan 339 is connected to the fan mounting plate 340 by the fiftieth screw 336, the forty-fifth flat washer 337 and the forty-fifth elastic washer 338.

Claims

1. A fixed-point explosion-proof infrared remote sensing gas leak detector, characterized in that: The leak detector is composed of a two-axis dual-light explosion-proof pan / tilt, a narrow-band infrared thermal imager, a visible light and a network switch module; The two-axis dual-light explosion-proof pan / tilt head is composed of an azimuth component, a pitch component, a thermal imaging shield component, a visible light shield component, and a coupling sleeve, wherein the pitch component is connected to the azimuth component by screws to form an azimuth axis system of the two-axis dual-light explosion-proof pan / tilt head, and the azimuth axis system working range is: 360°×N, the thermal imaging shield component and the visible light shield component are respectively located on the left and right sides of the two-axis dual-light explosion-proof pan / tilt head and are connected to the pitch component by coupling sleeves and screws to form a pitch axis system of the two-axis dual-light explosion-proof pan / tilt head, and the pitch axis system working range is: -90°~+90°; The narrow-band infrared thermal imager, visible light and network switch modules are respectively installed in the thermal imaging cover component and the visible light cover component; The narrow-band infrared thermal imager comprises a narrow-band infrared optical lens and a narrow-band infrared focal plane detector. The narrow-band infrared optical lens is used to ensure that the energy entering the infrared optical system is near the infrared absorption peak of the gas being measured and to limit the non-beneficial energy from entering the optical system. The narrow-band infrared focal plane detector is used to ensure that the detector response peak is near the infrared absorption peak of the gas being measured and has the maximum photoelectric response to the gas being measured and eliminates excess background noise. The narrow-band infrared optical lens and the narrow-band infrared focal plane detector are used to improve the signal-to-noise ratio of the infrared thermal imager for gas cloud imaging. An infrared window is provided at the front of the thermal imaging shield component, and the infrared window is installed obliquely with respect to the infrared optical axis, and its inclination angle is greater than half of the field of view of the infrared fixed-focus lens or half of the large field of view of the continuously variable magnification / multi-field of view, so as to ensure that the stray light generating cold reflection deviates from the infrared optical lens, thereby preventing the generation of cold reflection; The visible light and network switch module includes a visible light component and a network switch. The network switch is respectively connected to the narrow-band infrared thermal imager and the visible light component for communication and networking with a host computer. The visible light axis of the visible light component is consistent with the infrared light axis.

2. The fixed-point explosion-proof infrared remote sensing gas leak detector according to claim 1 is characterized in that: The narrow-band infrared thermal imager is a narrow-band medium-wave infrared thermal imager or a narrow-band long-wave infrared thermal imager, wherein: When a narrow-band medium-wave infrared thermal imager is used, the narrow-band medium-wave infrared thermal imager, visible light and network switch modules are respectively installed in a thermal imager shield cylinder and a visible light shield cylinder of a two-axis dual-light explosion-proof pan / tilt without a steel window; When a narrow-band long-wave infrared thermal imager is used, the narrow-band long-wave infrared thermal imager, visible light and network switch modules are respectively installed in the thermal imager shield cylinder and the visible light shield cylinder of the two-axis dual-light explosion-proof pan / tilt with steel windows; The narrow-band long-wave infrared thermal imager is realized by using a cooled or uncooled narrow-band focal plane detector or a wide-band uncooled detector plus a narrow-band filter, and the infrared optical lens is a continuously variable magnification lens, a multi-field of view or a fixed-focus infrared optical lens; The narrowband filter of the narrowband detector is installed in the Dewar to reduce the thermal noise caused by the narrowband filter; The infrared detector focal plane material adopts mercury cadmium telluride, and the proportions of the three materials of tellurium, cadmium and mercury are configured according to the response band of the measured gas to ensure that the detector response peak matches the band where the infrared absorption peak of the measured gas is located.

3. The fixed-point explosion-proof infrared remote sensing gas leak detector according to claim 2 is characterized in that: A visible light window and a fill light window are arranged at the front of the visible light shield component; a fill light and a fill light heat dissipation bracket are arranged in the fill light barrel; a thermal conductive rubber pad is arranged between the fill light board and the fill light heat dissipation bracket. When the infrared shield component adopts a narrow-band medium-wave infrared thermal imager, the infrared window adopts a sapphire material that is transparent to medium-wave infrared, with a hard carbon film on the front surface and an anti-reflection film on the rear surface; when a narrow-band long-wave infrared thermal imager is adopted, the infrared window adopts a germanium material that is transparent to long waves, with a hard carbon film on the front surface and an anti-reflection film on the rear surface.

4. The fixed-point explosion-proof infrared remote sensing gas leak detector according to claim 2 is characterized in that: The azimuth component includes a first bearing, a second bearing, a third bearing, a first azimuth seat, a second azimuth seat, a first worm gear, a first gear, and a first slip ring; the third bearing is installed in the inner hole of the first azimuth seat, and the second azimuth seat is installed in the inner hole of the third bearing. A lip seal ring is installed on the lower side of the third bearing, and its outer and inner diameters are in contact with the first azimuth seat and the second azimuth seat respectively to form a dynamic seal of the azimuth component; an O-ring is installed in the sealing groove on the upper end face of the mounting flange of the first azimuth seat to form a static seal with the pitch component; a first sleeve is installed in the inner hole of the first azimuth seat, and the first sleeve is in contact with the first azimuth seat. The first bearing is installed in the inner hole at the upper end of the first bearing, the outer ring of the bearing is in contact with the first sleeve, and the inner ring is suspended; the first worm wheel, the first gear, and the first bearing adjustment gasket are installed in sequence on the upper end of the first bearing and locked with the locking nut. The first bearing adjustment gasket is used to eliminate the axial clearance between the third bearing and the first bearing to ensure that the bearing can rotate flexibly when the locking nut is tightened; a flat key is installed in the keyway of the second bearing seat and the first worm wheel, and the flat key ensures that the second bearing seat and the first worm wheel rotate synchronously The first gear is fastened to the first worm gear by screws; a second bearing is installed in the inner hole at the upper end of the second azimuth seat and fastened by the first bearing retaining ring; a first slip ring is installed in the second sleeve, and the gap between the slip ring stator and the inner hole of the second sleeve is filled with epoxy resin; a second sleeve is installed in the inner hole on the lower side of the second azimuth seat, and the second sleeve and the second azimuth seat are clearance-matched, and the size of the gap and the length of the fitting surface meet the explosion-proof requirements, and the first slip ring is fastened to the second azimuth seat by screws; the lead wire of the first slip ring rotor passes through the inner hole of the second bearing to prevent the lead wire of the slip ring rotor from being damaged during the long-term rotation of the pan / tilt The azimuth drive component is installed at the upper end of the first azimuth seat, positioned by the inner hole at the upper end of the first azimuth seat, and fastened by screws; the first worm is meshed with the first worm wheel to provide power for the rotation of the azimuth component; the power supply circuit board, the servo control board, and the main control circuit board are installed in the inner cavity on the lower side of the second azimuth seat, and fastened by studs and screws; an O-ring is installed in the sealing groove on the upper end face of the bottom cover, and the bottom cover is installed on the lower side of the second azimuth seat and fastened by screws; the upper end face of the bottom cover is provided with two terminals for connecting the pan / tilt to the chassis ground and the earth, and the ground wire mark, the ground wire and the grounding mark are installed on the stud, and fastened by nuts; An explosion-proof socket is installed in the socket mounting hole on the lower side of the second position seat. The gap between the explosion-proof socket and the second position seat and the gap between the lead wires in the socket are filled with epoxy resin to ensure the explosion-proof requirements.

5. The fixed-point explosion-proof infrared remote sensing gas leak detector according to claim 4 is characterized in that: The azimuth drive component is connected to the pitch interface plate by a worm bearing seat and an azimuth motor seat through screws and is positioned by a cylindrical pin; the fourth bearing and the seventh bearing are installed in the bearing mounting holes of the azimuth motor seat and the worm bearing seat, and the first worm, the seventh bearing, the first worm and the fourth bearing are installed in the bearing, and are respectively fastened by the inner hole shoulder of the azimuth motor seat, the second bearing adjustment gasket and the third bearing pressure ring; the second bearing adjustment gasket is used to adjust the axial clearance between the seventh bearing and the fourth bearing, and the bearing can rotate flexibly when the bearing clearance is eliminated, and the third bearing pressure ring is fastened to the worm bearing seat by screws; the third pulley baffle plate and the fourth pulley baffle plate are respectively installed on both sides of the second pulley to prevent the first pulley from During the movement of the step belt, it slides out from the second pulley; the third pulley baffle, the second pulley and the fourth pulley baffle are sequentially mounted on the first worm shaft and fastened with screws; flat keys are installed in the keyways of the first worm, the third pulley baffle, the second pulley and the fourth pulley baffle to ensure that the first worm and the second pulley rotate synchronously; the first motor is installed on the azimuth motor seat and fastened with screws; the second pulley baffle, the first pulley and the first pulley baffle are sequentially mounted on the motor shaft of the first motor and fastened with screws; flat keys are installed in the keyways of the motor shaft of the first motor, the second pulley gear, the first pulley and the first pulley baffle to ensure that the first motor shaft and the first pulley can rotate synchronously; The second pulley is equipped with a first synchronous belt for transmitting the rotation of the first motor to the first worm gear, so as to provide power for the azimuth driving component; the pitch interface plate is equipped with an encoder shaft, which is fastened with screws; the fifth bearing and the sixth bearing are installed in the hole at the upper end of the encoder shaft, which are fastened with the fifth bearing pressure ring; the first magnet mounting shaft is installed in the inner holes of the fifth bearing and the sixth bearing, which are fastened with the fourth bearing pressure ring; the second gear is installed on the shaft at the upper end of the first magnet mounting shaft, which is fastened with the second gear pressure plate, and the second gear pressure plate is fastened to the first magnet mounting shaft with screws; a vertical plate is provided in the circumference of the second gear pressure plate, which cooperates with the optical coupler installed on the first encoder demodulation board, and is used to to set the rotation zero position of the azimuth component; a first magnet is installed in the mounting hole in the middle of the upper end of the first magnet mounting shaft and is firmly bonded with epoxy resin; a first magnetic encoder chip is installed on the first encoder demodulation board, with its center facing the central axis of the first magnet, and the first magnetic encoder chip can calculate the rotation angle of the first magnet mounting shaft in real time; the second gear is meshed with the first gear in the azimuth component, and the first worm drives the first worm wheel while synchronously transmitting the rotation to the first magnet mounting shaft, which is used to measure the angular position of the pitch component in the azimuth component in real time; the first encoder demodulation board is fixed to the encoder demodulation board mounting frame by screws, and the encoder demodulation board mounting frame is connected to the pitch interface board by screws.

6. The fixed-point explosion-proof infrared remote sensing gas leak detector according to claim 1 is characterized in that: The pitch component is equipped with a pitch bearing seat on the left and right sides of the main cylinder body, and the pitch bearing seat is connected to the main cylinder by welding; the third sleeve, the eighth bearing and the ninth bearing are installed in the left side of the pitch bearing seat, and the eighth bearing and the ninth bearing are installed on both sides of the third sleeve respectively. The medium-wave thermal imaging cover component is installed in the eighth bearing, the ninth bearing and the inner hole of the third sleeve. The third sleeve, the pitch bearing seat and the medium-wave thermal imaging cover component are matched with clearance, and the clearance size and matching length meet the explosion-proof requirements; between the pitch bearing seat and the medium-wave thermal imaging cover component , a lip seal is installed on the outside of the eighth bearing; the third bearing adjustment gasket, bearing spacer, third gear, and second worm gear are installed on the shaft of the medium-wave thermal imaging cover component in sequence and fastened with a worm gear pressure ring. The third bearing adjustment gasket is used to adjust the axial clearance between the eighth bearing and the ninth bearing; a flat key is installed in the keyway of the third gear, the second worm gear and the medium-wave thermal imaging cover component to ensure that the third gear, the second worm gear and the medium-wave thermal imaging cover component rotate synchronously; the fourth shaft sleeve, the tenth bearing, the eleventh bearing, the tenth bearing, the eleventh shaft The bearings are respectively installed on both sides of the fourth sleeve, the visible light shield component is installed in the tenth bearing, the eleventh bearing and the inner hole of the fourth sleeve, and the fourth sleeve, the pitch bearing seat and the visible light shield component are matched with a clearance, and the clearance size and the matching length meet the explosion-proof requirements; the visible light shield component is fastened to the tenth bearing by the sixth bearing pressure ring, and the third bearing adjustment gasket is used to adjust the axial clearance between the tenth bearing and the eleventh bearing; between the pitch bearing seat and the visible light shield component, and on the outside of the eleventh bearing, a lip sealing ring is installed; between the medium-wave thermal imaging shield component and the visible light shield component The coupling sleeves and screws are used for connection and fastening, and the screws are installed in the keyways of the rotating shafts of the medium-wave thermal imaging cover component and the visible light cover component to ensure that the rotation angles of the medium-wave thermal imaging cover component and the visible light cover component are consistent; the pitch drive component is connected to the pitch bearing seat and the main cylinder by screws; the fourth gear of the pitch drive component is meshed with the third gear, and the second worm is meshed with the second worm gear; the first image processing board and the second image processing board are connected to the main cylinder by studs and screws; the main cylinder cover is connected to the main cylinder by its own thread, and an O-ring is installed in the sealing groove on the upper end face of the main cylinder.

7. The fixed-point explosion-proof infrared remote sensing gas leak detector according to claim 6 is characterized in that: The pitch drive mechanism is provided with a fourteenth bearing and an eleventh bearing in the pitch motor seat. A second worm is provided in the inner holes of the fourteenth bearing and the eleventh bearing. The outer diameter of the fourteenth bearing contacts the step of the corresponding bearing hole of the pitch motor seat, the inner ring contacts the shaft shoulder of the second worm, the inner ring of the eleventh bearing contacts the shaft shoulder of the second worm, the outer ring contacts the fourth adjusting gasket and the seventh bearing pressure ring. The fourth adjusting gasket is used to adjust the axial clearance between the fourteenth bearing and the eleventh bearing. The eleventh bearing is fastened by the seventh bearing pressure ring. The bearing pressure ring is connected to the pitch motor seat by screws; the sixth pulley baffle, the third pulley, and the fifth pulley baffle are sequentially mounted on the second worm shaft and fastened with screws; flat keys are installed in the sixth pulley baffle, the third pulley, the fifth pulley baffle and the second worm keyway to ensure that the third pulley rotates synchronously with the second worm; the second motor is installed on the pitch motor seat and the motor is fastened with screws; the eighth pulley baffle, the fourth pulley, and the seventh pulley baffle are sequentially mounted on the shaft of the second motor and fastened with screws; The seventh pulley baffle plate and the keyway of the second motor are provided with flat keys to ensure that the fourth pulley rotates synchronously with the second motor shaft; the second synchronous belt is installed on the fourth pulley and the third pulley; the twelfth bearing, the thirteenth bearing and the second magnet mounting shaft are installed in the pitch motor seat, the twelfth bearing and the thirteenth bearing are fastened to the pitch motor seat by the pitch encoder bearing pressure plate and screws, the second magnet mounting shaft is installed in the twelfth bearing and the thirteenth bearing, and is fixed by the second bearing clamp ring; the fourth gear is installed on the second magnet mounting shaft, meshes with the third gear of the pitch component, and is fastened by the third gear pressure plate; a vertical plate is provided in the circumference of the third gear pressure plate, and the vertical plate cooperates with the optical coupler installed on the second encoder demodulation board to provide a zero position for the pitch drive component; the second magnet is installed in the mounting hole at the center of the second magnet mounting shaft, and the second magnet is firmly bonded by epoxy resin; the second magnetic encoder chip installed on the second encoder demodulation board is aligned with the center of the second magnet, and is used to measure the angular position of the second magnet mounting shaft in real time; the second encoder demodulation board is connected to the pitch motor seat by screws.

8. The fixed-point explosion-proof infrared remote sensing gas leak detector according to any one of claims 1 to 7, characterized in that: The medium-wave thermal imager shield component is equipped with a second fan and a first fan for heat dissipation at the front and rear parts. The second fan is connected to the second fan mounting frame by screws. The second fan mounting frame and the thermal imaging mounting plate are connected to the mounting base plate of the narrow-band medium-wave infrared thermal imager by screws, and are installed in the first thermal imager shield cylinder as a whole and fastened by screws; the first fan is connected to the first fan mounting frame by screws, and the first fan mounting frame and the first fan are installed at the rear of the narrow-band medium-wave infrared thermal imager as a whole and connected to the first thermal imager shield cylinder by screws; the first infrared window, the first rubber pad, the first infrared window pressure ring, and the second infrared window pressure ring are installed in the first front cover in sequence and fastened by screws; the first front cover is connected to the first thermal imager shield cylinder by its own thread, and an O-ring is installed in the sealing groove at the front end of the first thermal imager shield cylinder; the second slip ring is installed in the first slip ring sleeve, and the slip ring stator and the inner hole clearance of the first slip ring sleeve are matched, and epoxy resin is used to seal the first front cover. The bonding is firm, the cavity between the slip ring stator lead and the first slip ring sleeve is filled with epoxy resin, the thickness of the epoxy resin meets the flameproof requirements, the first slip ring sleeve is installed in the first pitch axis, the clearance is matched, and the first pitch slip ring pressure ring is used to tighten it, and the clearance size and the length of the fitting surface between the first slip ring sleeve and the first pitch axis meet the flameproof requirements; the second rubber pad is installed in the first thermal imager shield cylinder, installed between the first pitch axis and the first thermal imager shield cylinder, and the first pitch axis is connected to the first thermal imager shield cylinder by screws; the first pitch axis pressure ring is installed outside the first pitch axis and connected to the first thermal imager shield cylinder by its own thread; O-rings are installed between the first rear cover and the first thermal imager barrel and between the first rear cover and the first plug screw, and the first plug screw and the first rear cover, as well as the first rear cover and the first thermal imager shield cylinder, are connected to each other by their own threads; a first sunshade is installed on the upper part of the first thermal imager shield cylinder and is tightened by screws. The long-wave thermal imager shield component is composed of a second infrared window, a fourth rubber pad, a third infrared window pressure ring, and a fourth infrared window pressure ring, which are installed in sequence in the rear side hole of the third front cover and fastened with screws; the third front cover is connected to the second thermal imager shield cylinder by screws, and an O-ring is installed in the front end sealing groove of the second thermal imager shield cylinder; the explosion-proof steel window is installed in the corresponding installation hole at the front end of the third front cover and fastened with screws; the third rubber pad is installed between the explosion-proof steel window and the second front cover and connected with screws.

9. The fixed-point explosion-proof infrared remote sensing gas leak detector according to any one of claims 1 to 7, characterized in that: The visible light shield component is assembled by the visible light and network switch module in the visible light shield cylinder, and is fastened by studs, nuts, and screws. The front and rear positions of the visible light and network switch module on the studs are adjusted by two nuts, and the angle of the optical axis of the visible light and network switch module in the azimuth direction is adjusted. By adjusting the upper and lower positions of the visible light adjustment block in the visible light and network switch module in the visible light shield cylinder, the angle of the optical axis of the visible light and network switch module in the pitch direction can be adjusted to keep the visible light optical axis consistent with the infrared optical axis; the visible light window, the fifth image rubber pad, and the visible light window pressure ring are sequentially installed in the third front cover, and the visible light window pressure ring is installed by the visible light adjustment block. The light window pressure ring is fastened by its own thread, and the third front cover is connected to the visible light shield cylinder by its own thread; an O-ring is installed in the sealing groove at the front end of the visible light shield cylinder; the third fan is connected to the fill light heat dissipation bracket by screws, and the fill light heat dissipation bracket is firmly bonded to the visible light shield cylinder by epoxy resin; the fill light board is connected to the visible light shield cylinder by screws, and a thermal conductive rubber pad is installed between the fill light board and the fill light heat dissipation bracket, which is used to conduct the heat generated by the fill light to the visible light shield cylinder through the fill light heat dissipation bracket; the fill light shield transition sleeve is firmly bonded to the visible light shield cylinder by epoxy resin; the fill light window and the sixth rubber The gasket and the fill light window pressure ring are installed in the third front cover in sequence and fastened by the fill light window pressure ring's own thread; the third front cover is installed at the front end of the fill light shield transition sleeve and fastened by its own thread; the third slip ring is installed in the second slip ring sleeve, the slip ring stator is firmly bonded to the second slip ring sleeve by epoxy resin, the cavity between the slip ring stator lead and the second slip ring sleeve is filled with epoxy resin, and the thickness of the epoxy resin meets the explosion-proof requirements; the second slip ring sleeve is installed in the shaft of the visible light shield cylinder and fastened by the second pitch slip ring pressure ring, the second slip ring sleeve and the visible light shield cylinder adopt clearance fit, the clearance size and the length of the fitting surface meet the explosion-proof requirements; in the visible light shield, ... A cylindrical pin is installed in the corresponding pin hole of the visible light shield cylinder, and the cylindrical pin cooperates with the limiting groove of the pitch bearing seat in the pitch component to limit the angular range of the pitch component; an O-ring is installed in the sealing groove at the rear end of the visible light shield cylinder, and the second rear cover is connected to the visible light shield cylinder with its own thread; a wiper component is installed at the front end of the visible light shield cylinder; a second plug screw is provided at the upper end of the visible light shield cylinder, and an O-ring is installed in the sealing groove at the upper end of the visible light shield cylinder, and the second plug screw is fastened to the visible light shield cylinder with its own thread; a second sunshade is installed at the upper end of the visible light shield cylinder and fastened with screws.

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