A mobile intelligent gas detector

Abstract

The present invention discloses a mobile intelligent gas detector, which relates to the field of gas detection technology. The present invention comprises a housing, a pan-tilt camera module, an active air supply, a centrifugal dust removal detection module and a multi-modal alarm device. External gas enters the separation cylinder through the air guide cover and the tangential air inlet, and the dust settles under the centrifugal force. The clean gas flushes the carbon monoxide sensor, hydrogen sulfide sensor, oxygen sensor and methane sensor in the gas detection tube under the drive of the turbine blades, thereby realizing high-speed and low-drift detection. The pan-tilt intelligently distributes the driving torque in the alarm or inspection mode through friction and electromagnetic switching mechanism, driving the camera to view 360 degrees and synchronize sound and light warnings. Integrating active sensitization, dust removal protection and panoramic monitoring, it can significantly improve the efficiency of early warning of hazardous gases and on-site emergency disposal.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, in particular to a mobile intelligent gas detector. Background Art

[0002] Most current mobile gas detectors have a "passive sampling" structure: they rely on natural diffusion from the environment or external pumps to adsorb a small amount of sample gas into a single detection chamber, and then use electrochemical or infrared sensor elements to complete the analysis. Its main defects are: the path of gas entering the detection chamber is short and the flow rate is random, resulting in response lag, amplified instantaneous concentration fluctuations, and an inability to lock onto dangerous peaks in a short period of time; the lack of an active separation mechanism means that dust and oil mist entrained in the air can easily deposit on the sensor membrane surface, causing zero-point drift and sensitivity attenuation; the instrument usually only provides a fixed-angle screen display, which cannot be used for visual evidence collection of dangerous spaces; the alarm is not deeply integrated with video, positioning and other information, making it difficult for on-site commanders to obtain multimodal evidence in a timely manner, affecting the efficiency of emergency response. Summary of the Invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a mobile intelligent gas detector, comprising a base, a shell fixedly mounted on the base, a pan-tilt head rotatably mounted on the top of the shell, a camera fixedly mounted on the pan-tilt head, a display screen fixedly mounted on the circumferential surface of the shell, an air inlet also provided on the circumferential surface of the shell, an air guide hood fixedly mounted on the inner wall of the shell at the position of the air inlet, the interior of the air guide hood is connected with the outside of the shell through the air inlet, a collecting shell and a separation cylinder are provided at the axial position of the shell, the collecting shell and the separation cylinder are fixedly connected, and the collecting shell is fixedly mounted on the base; a driving part is provided inside the pan-tilt head, the driving part is used to drive the pan-tilt head to rotate on the shell; a gas detection tube is provided at the axial position of the collecting shell and the separation cylinder, an air turbine blade is rotatably mounted inside the gas detection tube, four gas detection sensors for detecting carbon monoxide, hydrogen sulfide, oxygen and methane respectively are also fixedly mounted on the inner wall of the gas detection tube, a separation port is provided at the top circumferential position of the gas detection tube, wherein the air turbine blade is used to drive the gas to move toward the gas detection sensor.

[0004] Preferably, an air inlet is fixedly provided at a tangential position of the circumferential surface of the separation cylinder, and the air inlet is connected to the inside of the air guide cover for guiding the gas outside the shell into the inside of the separation cylinder.

[0005] Preferably, a plurality of exhaust channels are opened radially on the inner wall of the base, and all the exhaust channels are connected to the bottom of the gas detection tube and are used to discharge the gas sucked into the separation cylinder through the separation port, the gas detection tube and the exhaust channel.

[0006] Preferably, a rotating disk bracket is fixedly installed on the top of the inner part of the shell, and a rotating disk and a gear ring are rotatably installed on the rotating disk bracket, wherein the rotating disk and the gear ring are coaxially fixed and matched, and the circumferential surfaces of the rotating disk and the gear ring are arranged flush; the center position of the rotating disk is rotatably matched with a planetary gear mounting disk, and the edge position of the planetary gear mounting disk is rotatably mounted with three switching planetary gears, and the center position of the planetary gear mounting disk is rotatably matched with a center gear, and the center gear and the gear ring are meshed and driven by switching planetary gears.

[0007] Preferably, a switching shaft is fixedly installed at the axis center of the planetary gear mounting plate, and a toggle gear is coaxially fixed above the central gear through a shaft sleeve. The central gear, the shaft sleeve and the toggle gear are all rotatably sleeved on the circumferential surface of the switching shaft; a sealing rubber ring is used to rotate and seal the gimbal and the top of the outer shell, and there is rotational friction resistance between the outer shell and the gimbal through the sealing rubber ring; the shaft sleeve passes through the top of the outer shell to the interior of the gimbal.

[0008] Preferably, a driving motor and a resistance motor are fixedly mounted on the inner wall of the gimbal, wherein an input planetary gear is fixedly mounted on the output shaft of the driving motor, wherein the toggle gear is rotationally mounted at the center position of the top of the shell, and the input planetary gear is meshed with the toggle gear for transmission.

[0009] Preferably, a friction limiting plate is fixedly mounted on the inner wall of the gimbal, an electromagnet bow bracket is fixedly mounted on the friction limiting plate, and an electromagnet is fixedly mounted on the electromagnet bow bracket, wherein the switching shaft passes through the friction limiting plate, the electromagnet bow bracket and the electromagnet to the interior of the gimbal, so that the switching shaft rotates in coordination with the friction limiting plate, the electromagnet bow bracket and the electromagnet.

[0010] Preferably, the upper surface of the friction limiting plate is frictionally engaged with a friction disc that magnetically engages the electromagnet. The friction disc is splined and slidingly mounted on the circumferential surface of the switching shaft. A compression spring is rotatably disposed between the opposing surfaces of the electromagnet's arched bracket and the friction disc. The compression spring is disposed around the switching shaft. Both ends of the compression spring are rotationally engaged with both the electromagnet's arched bracket and the friction disc, so that the compression spring applies a compressive force to the friction limiting plate, thereby limiting rotation of the switching shaft through friction between the friction disc and the friction limiting plate.

[0011] Preferably, the top end of the switching shaft is fixedly matched with the rotating shaft of the resistance motor; a connecting rotating shaft is fixedly installed at the axial center position of the rotating disk, the connecting rotating shaft extends to the interior of the gas detection tube, and the connecting rotating shaft is fixedly matched with the turbine blades through a linkage rotating shaft; a plurality of warning lights are also fixedly installed on the circumferential surface of the outer shell.

[0012] Compared with the existing technology, the present invention has the following beneficial effects: (1) The present invention utilizes a built-in air supply system composed of a rotating disk and air turbine blades to continuously guide the external sample gas into the separation cylinder along the tangential direction, and then spray it into the detection tube at high speed through the separation port. The active air flow flushing method significantly increases the gas volume received by the sensor per unit time, shortens the response time, effectively suppresses the concentration dilution or accumulation error caused by natural convection, and reveals the danger threshold several times earlier than the traditional passive diffusion method; (2) The tangential air intake of the present invention forms a strong centrifugal field with the rotating cylinder wall, and the particles with higher density are thrown to the wall and settled to the collection shell within the first rotation, and no longer enter the detection chamber. This arrangement reduces the dust load, keeps the sensor membrane surface clean for a long time, extends the calibration cycle, reduces manual maintenance, and significantly reduces the interruption rate; (3) The top pan-tilt platform of the present invention is coupled with the camera through a driving resistance dual motor and a planetary gear switching mechanism, which can automatically cruise in different directions before and after the alarm, and capture the scene in real time. A single device can complete 360-degree integrated monitoring of environmental gases and video; (4) The instrument of the present invention simultaneously integrates four high-precision sensors for carbon monoxide, hydrogen sulfide, oxygen, and methane, an omnidirectional warning light, and a buzzer. When any indicator exceeds the standard, an audible and visual alarm is triggered and the camera is linked to the direction of the leak source. Compared with the traditional single light prompt, it greatly improves the intuitive perception of the danger direction and concentration level of personnel, shortening the evacuation and risk elimination decision-making time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 It is a structural schematic diagram of the air inlet of the present invention.

[0015] Figure 3 Schematic diagram of the internal structure of the shell of the present invention.

[0016] Figure 4 This is a structural diagram of the gas detection sensor of the present invention.

[0017] Figure 5 It is a structural schematic diagram of the shaft sleeve of the present invention.

[0018] In the figure: 101-base; 102-exhaust channel; 103-gas detection tube; 104-turbine blade; 105-gas detection sensor; 106-linked shaft; 107-separation port; 108-connecting shaft; 109-rotating disk; 110-housing; 111-collecting shell; 112-separation cylinder; 113-rotating disk bracket; 114-gear ring; 115-planetary gear mounting plate; 116-center gear; 117-shaft sleeve; 11 8-switching gear; 119-input planetary gear; 120-friction limiting plate; 121-drive motor; 122-electromagnet; 123-electromagnet bow bracket; 124-extrusion spring; 125-friction disc; 126-switching shaft; 127-resistance motor; 128-camera; 129-pan / tilt platform; 130-air intake duct; 131-air guide hood; 132-air intake; 133-warning light; 134-display; 135-switching planetary gear. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-Figure 5 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0020] The present invention provides a mobile intelligent gas detector, including a base 101, a housing 110 is fixedly mounted on the base 101, a pan / tilt 129 is rotatably mounted on the top of the housing 110, a camera 128 is fixedly mounted on the pan / tilt 129, a display screen 134 is fixedly mounted on the circumferential surface of the housing 110, an air inlet 132 is also provided on the circumferential surface of the housing 110, an air guide hood 131 is fixedly mounted on the inner wall of the housing 110 at the position of the air inlet 132, the interior of the air guide hood 131 is connected to the outside of the housing 110 through the air inlet 132, a collecting shell 111 and a separating cylinder 112 are provided at the axial position of the housing 110, and the collecting shell 111 and the separating cylinder 112 are fixedly mounted on the circumferential surface of the housing 110. The collecting shell 111 is fixedly connected to the base 101. The pan-tilt platform 129 is internally provided with a driving unit for driving the pan-tilt platform 129 to rotate on the outer shell 110. A gas detection tube 103 is provided at the axis of the collecting shell 111 and the separation cylinder 112. An air turbine blade 104 is rotatably mounted inside the gas detection tube 103. Four gas detection sensors 105 for detecting carbon monoxide, hydrogen sulfide, oxygen, and methane are also fixedly mounted on the inner wall of the gas detection tube 103. A separation port 107 is provided at the top circumferential position of the gas detection tube 103. The air turbine blade 104 is used to drive the gas toward the gas detection sensor 105. An air inlet 130 is fixedly connected to the tangent position of the circumferential surface of the separation cylinder 112. The air inlet 130 is internally connected to the air guide cover 131 and is used to guide the gas outside the outer shell 110 into the interior of the separation cylinder 112. A plurality of exhaust channels 102 are radially opened on the inner wall of the base 101 , and all the exhaust channels 102 are connected to the bottom of the gas detection tube 103 and are used to discharge the gas sucked into the separation cylinder 112 through the separation port 107 , the gas detection tube 103 and the exhaust channel 102 .

[0021] A rotating disk bracket 113 is fixedly installed on the top of the inner part of the shell 110, and a rotating disk 109 and a gear ring 114 are rotatably installed on the rotating disk bracket 113, wherein the rotating disk 109 and the gear ring 114 are coaxially fixed and matched, and the circumferential surfaces of the rotating disk 109 and the gear ring 114 are arranged flush; the center position of the rotating disk 109 is rotatably matched with a planetary gear mounting disk 115, and the edge position of the planetary gear mounting disk 115 is rotatably mounted with three switching planetary gears 135, and the center position of the planetary gear mounting disk 115 is rotatably matched with a center gear 116, and the center gear 116 and the gear ring 114 are meshed and transmitted through the switching planetary gears 135. A switching shaft 126 is fixedly installed at the axis center of the planetary gear mounting plate 115, and a toggle gear 118 is coaxially fixed above the central gear 116 through a shaft sleeve 117. The central gear 116, the shaft sleeve 117 and the toggle gear 118 are all rotatably sleeved on the circumferential surface of the switching shaft 126; a sealing rubber ring is used to rotationally seal the gimbal 129 and the top of the housing 110, and there is rotational friction resistance between the housing 110 and the gimbal 129 through the sealing rubber ring; the shaft sleeve 117 passes through the top of the housing 110 to the interior of the gimbal 129.

[0022] A drive motor 121 and a resistance motor 127 are fixedly mounted on the inner wall of the pan-tilt platform 129. An input planetary gear 119 is fixedly mounted on the output shaft of the drive motor 121. A toggle gear 118 is rotatably mounted at the center of the top of the housing 110, and the input planetary gear 119 meshes with the toggle gear 118 for transmission. A friction limiting plate 120 is also fixedly mounted on the inner wall of the pan-tilt platform 129. An electromagnet arch bracket 123 is fixedly mounted on the friction limiting plate 120, and an electromagnet 122 is fixedly mounted on the electromagnet arch bracket 123. A switching shaft 126 extends through the friction limiting plate 120, the electromagnet arch bracket 123, and the electromagnet 122 to the interior of the pan-tilt platform 129, such that the switching shaft 126 rotatably engages with the friction limiting plate 120, the electromagnet arch bracket 123, and the electromagnet 122.

[0023] The upper surface of the friction limiting plate 120 is frictionally engaged with a friction disc 125 that magnetically engages with the electromagnet 122. The friction disc 125 is splined and slidingly mounted on the circumferential surface of the switching shaft 126. A compression spring 124 is rotatably mounted between the opposing surfaces of the electromagnet arch bracket 123 and the friction disc 125. The compression spring 124 is disposed around the switching shaft 126. Both ends of the compression spring 124 are rotationally engaged with both the electromagnet arch bracket 123 and the friction disc 125. This allows the compression spring 124 to apply a compressive force to the friction disc 125 against the friction limiting plate 120, thereby limiting the rotation of the switching shaft 126 through the friction between the friction disc 125 and the friction limiting plate 120.

[0024] The top end of the switching shaft 126 is fixedly matched with the rotating shaft of the resistance motor 127; the connecting rotating shaft 108 is fixedly installed at the axial position of the rotating disk 109, the connecting rotating shaft 108 extends to the interior of the gas detection tube 103, and the connecting rotating shaft 108 is fixedly matched with the turbine blade 104 through the linkage rotating shaft 106; a plurality of warning lights 133 are also fixedly installed on the circumferential surface of the outer shell 110.

[0025] The working principle of a mobile intelligent gas detector disclosed in the present invention is as follows: the drive motor 121 is started, and the output shaft of the drive motor 121 drives the input planetary gear 119 to rotate. The rotation of the input planetary gear 119 drives the toggle gear 118 to rotate. The rotation of the toggle gear 118 drives the shaft sleeve 117 to rotate. The rotation of the shaft sleeve 117 drives the central gear 116 to rotate. The rotation of the central gear 116 drives the gear ring 114 to rotate through the switching planetary gear 135. At this time, the friction plate 125 limits the rotation of the switching shaft 126 through the friction between the friction limiting plate 120 (the friction plate 125 and the switching shaft 126 are splined and slidingly matched). This will cause the planetary gear mounting plate 115 fixed to the switching shaft 126 to be unable to rotate, so the switching planetary gear 135 cannot revolve. At this time, all the power will be transmitted to the gear ring 114 through the central gear 116 (friction resistance is not calculated). The rotation of the gear ring 114 will drive the rotating disk 109 to rotate, and the rotating disk 109 will rotate. The turntable 109 drives the turbine blades 104 to rotate by connecting the rotating shaft 108 and the linkage rotating shaft 106. The turbine blades 104 will drive the gas inside the gas detection tube 103 to flow from top to bottom, and discharge the gas inside the separation port 107 into the exhaust channel 102, and then be discharged through the exhaust channel 102. In this process, the gas inside the separation cylinder 112 will enter the gas detection tube 103 through the separation port 107, and the gas inside the air guide cover 131 will enter the separation cylinder 112 along the tangential direction of the inner wall of the separation cylinder 112 through the air inlet 130. The external gas enters the air guide cover 131 through the air inlet 132. Finally, the external gas is driven by the turbine blades 104 to contact the gas detection sensor 105 (the detection gas range of the four gas detection sensors 105 is: carbon monoxide 0-1000ppm; hydrogen sulfide 0-100ppm; oxygen 0-30%vol; methane 0-100%LEL). Compared with the traditional passive gas detection method, this method can actively allow the gas to contact the gas detection sensor 105, and can detect whether the gas concentration exceeds the standard earlier.

[0026] After the device is powered on and functioning properly, bring it to the construction site. Place the device on a flat surface and manually rotate the pan / tilt 129 so that the camera 128 is aligned with the area to be monitored and the monitoring image is clear. The exhaust duct 102 can also be mounted on a tripod for use if there is no mounting space on site. When the device detects that the ambient gas exceeds a safe threshold, the warning light 133 will illuminate steadily and a buzzer will sound (a buzzer is also installed on the housing 110).

[0027] When no one is around, the pan / tilt 129 can also drive the camera 128 to rotate actively to observe the field of view in different directions. Specifically, it is necessary to start the electromagnet 122, which generates magnetic force to attract the friction disc 125, causing the friction disc 125 to move toward the electromagnet 122, and putting the extrusion spring 124 into a compressed state. At this time, the friction between the friction limiting plate 120 and the friction disc 125 disappears, and the switching shaft 126 is no longer restricted by the friction between the friction disc 125 and the friction limiting plate 120. At this time, the central gear 116 drives the gear ring 114 to rotate by switching the planetary gear 135, and part of the power will be transmitted to the planetary gear mounting plate 115, and then the switching shaft 126 will rotate, while switching the planetary gear 135. There will be revolution (the switching shaft 126 will drive the shaft movement of the resistance motor 127, the resistance motor 127 is a rotating accessory, and the rotor shaft of the resistance motor 127 here mainly provides resistance to the rotation of the switching shaft 126, because the resistance motor 127 rotor has resistance when rotating; it is used to distribute part of the power to the gear ring 114, otherwise if the switching shaft 126 is in complete free rotation, this will cause the power of the input planetary gear 119 to be fully transmitted to the switching shaft 126, because the resistance to the rotation of the turbine blades 104 is greater than the resistance to the rotation of the switching shaft 126 (the transmission friction is not considered). At this time, the output rotation of the drive motor 121 drives the input planetary gear 119 to rotate, and the input planetary gear 119 will revolve around the toggle gear 118. This is because there is relative rotation between the switching shaft 126 and the pan-tilt head 129. When the electromagnet 122 is not started, that is, there is friction between the friction disk 125 and the friction limiting plate 120, the switching shaft 126 and the pan-tilt head 129 are equivalent to a fixed state, that is, the drive motor 121 and the switching shaft 126 are both fixed on the pan-tilt head 129 (the fixing of the switching shaft 126 and the pan-tilt head 129 means that there is no relative rotation). Similarly, The switching planetary gear 135 on the planetary gear mounting plate 115 is equivalent to being rotatably mounted on the pan-tilt head 129. The output shaft of the drive motor 121 drives the turbine blades 104 to rotate through the input planetary gear 119, the toggle gear 118, the shaft sleeve 117, the central gear 116, the switching planetary gear 135, the gear ring 114, the rotating plate 109, the connecting shaft 108, and the linkage shaft 106. (When the turbine blades 104 rotate, the force exerted by the air reaction on the turbine blades 104 is offset by the rotational friction between the housing 110 and the pan-tilt head 129, and thus the pan-tilt head 129 cannot be driven to rotate.)When the switching shaft 126 rotates relative to the gimbal 129, that is, the switching planetary gear 135 and the gimbal 129 have a relative motion relationship (revolution), the torque applied to the gimbal 129 by the output shaft of the drive motor 121 (the input planetary gear 119 revolves around the toggle gear 118) and the switching shaft 126 cannot be offset. At this time, the output shaft of the drive motor 121 drives the input planetary gear 119, the toggle gear 118, the shaft sleeve 117, the central gear 116, the switching planetary gear 135, the gear ring 114, the rotating disk 109, the connecting shaft 108, the linkage shaft 106, and the turbine blades 104 to rotate, which requires resistance (where the turbine blades 104 and the air The resistance between the two components (ignored here, primarily mechanical friction transmission resistance) is applied to the drive motor 121 through its reaction force. This causes the output shaft of the drive motor 121 to drive the input planetary gear 119 to orbit around the toggle gear 118 (the rotational friction resistance between the pan / tilt platform 129 and the housing 110 is less than the transmission resistance along the path of the input planetary gear 119, toggle gear 118, shaft sleeve 117, central gear 116, switching planetary gear 135, gear ring 114, rotating disk 109, connecting shaft 108, linkage shaft 106, and turbine blades 104). As a result, the pan / tilt platform 129 rotates on top of the housing 110, thereby changing the viewing angle of the camera 128.

[0028] If there are floating particles (dust) in the ambient gas, when the gas enters the separation cylinder 112 along the tangent of the inner wall of the separation cylinder 112, it will rotate with the gas. During the rotation, the particles will be separated from the gas under the action of centrifugal force. The lighter gas will enter the gas detection tube 103 through the separation port 107, while the larger particle dust will rotate along the inner wall of the separation cylinder 112, and then fall into the collection shell 111 under the action of gravity, so that the dust is separated from the gas to be measured, reducing the impact of dust on the gas detection sensor 105.

Claims

1. A mobile intelligent gas detector, characterized by: The invention comprises a base (101), a housing (110) is fixedly mounted on the base (101), a pan / tilt (129) is rotatably mounted on the top of the housing (110), a camera (128) is fixedly mounted on the pan / tilt (129), a display screen (134) is fixedly mounted on the circumferential surface of the housing (110), an air inlet (132) is further provided on the circumferential surface of the housing (110), an air guide hood (131) is fixedly mounted on the inner wall of the housing (110) at the position of the air inlet (132), the interior of the air guide hood (131) is communicated with the exterior of the housing (110) through the air inlet (132), a collecting shell (111) and a separation cylinder (112) are provided at the axial position of the housing (110), and the collecting shell (111) and the separation cylinder (112) are fixedly communicated. The collecting shell (111) is fixedly mounted on the base (101); a driving unit is provided inside the pan / tilt platform (129), and the driving unit is used to drive the pan / tilt platform (129) to rotate on the housing (110); a gas detection tube (103) is provided at the axis position of the collecting shell (111) and the separation cylinder (112); a turbine blade (104) is rotatably mounted inside the gas detection tube (103); four gas detection sensors (105) for detecting carbon monoxide, hydrogen sulfide, oxygen and methane are fixedly mounted on the inner wall of the gas detection tube (103); a separation port (107) is provided at the top circumferential position of the gas detection tube (103); and the turbine blade (104) is used to drive the gas to move toward the gas detection sensor (105); An air inlet (130) is fixedly connected to a tangential position of the circumferential surface of the separation cylinder (112), and the air inlet (130) is connected to the interior of the air guide cover (131) for guiding gas outside the housing (110) into the interior of the separation cylinder (112); A plurality of exhaust channels (102) are provided in the radial direction of the inner wall of the base (101), and all the exhaust channels (102) are connected to the bottom of the gas detection tube (103) and are used to discharge the gas sucked into the separation cylinder (112) through the separation port (107), the gas detection tube (103), and the exhaust channels (102); A rotating disk bracket (113) is fixedly mounted on the top of the interior of the housing (110), and a rotating disk (109) and a gear ring (114) are rotatably mounted on the rotating disk bracket (113), wherein the rotating disk (109) and the gear ring (114) are coaxially fixedly matched, and the circumferential surfaces of the rotating disk (109) and the gear ring (114) are arranged flush; a planetary gear mounting disk (115) is rotatably mounted at the center position of the rotating disk (109), and three switching planetary gears (135) are rotatably mounted at the edge position of the planetary gear mounting disk (115), and a central gear (116) is rotatably mounted at the center position of the planetary gear mounting disk (115), and the central gear (116) and the gear ring (114) are meshed and driven by the switching planetary gears (135).

2. A mobile intelligent gas detector according to claim 1, characterized in that: A switching shaft (126) is fixedly mounted at the axis of the planetary gear mounting plate (115), and a toggle gear (118) is coaxially fixed above the central gear (116) through a shaft sleeve (117). The central gear (116), the shaft sleeve (117) and the toggle gear (118) are all rotatably sleeved on the circumferential surface of the switching shaft (126); a sealing rubber ring is used between the pan / tilt platform (129) and the top of the housing (110) to form a rotational seal, and there is a rotational friction resistance between the housing (110) and the pan / tilt platform (129) through the sealing rubber ring; wherein the shaft sleeve (117) passes through the top of the housing (110) to the inside of the pan / tilt platform (129).

3. A mobile intelligent gas detector according to claim 2, characterized in that: A driving motor (121) and a resistance motor (127) are fixedly mounted on the inner wall of the pan / tilt platform (129), wherein an input planetary gear (119) is fixedly mounted on the output shaft of the driving motor (121), wherein the toggle gear (118) is rotationally mounted at the center of the top of the housing (110), and the input planetary gear (119) is meshed with the toggle gear (118) for transmission.

4. A mobile intelligent gas detector according to claim 3, characterized in that: A friction limiting plate (120) is fixedly mounted on the inner wall of the pan-tilt platform (129), an electromagnet bow-shaped bracket (123) is fixedly mounted on the friction limiting plate (120), and an electromagnet (122) is fixedly mounted on the electromagnet bow-shaped bracket (123), wherein a switching shaft (126) passes through the friction limiting plate (120), the electromagnet bow-shaped bracket (123) and the electromagnet (122) to the interior of the pan-tilt platform (129), so that the switching shaft (126) is rotatably matched with the friction limiting plate (120), the electromagnet bow-shaped bracket (123) and the electromagnet (122).

5. The mobile intelligent gas detector according to claim 4, characterized in that: The upper surface of the friction limiting plate (120) is frictionally overlapped with a friction disc (125) that is magnetically engaged with the electromagnet (122). The friction disc (125) is sleeved on the circumferential surface of the switching shaft (126) in a spline sliding manner. An extrusion spring (124) is rotatably provided between the opposing surfaces of the electromagnet bow bracket (123) and the friction disc (125). The extrusion spring (124) is arranged around the switching shaft (126).

6. The mobile intelligent gas detector according to claim 5, characterized in that: The top end of the switching shaft (126) is fixedly matched with the rotating shaft of the resistance motor (127); a connecting rotating shaft (108) is fixedly installed at the axis position of the rotating disk (109), the connecting rotating shaft (108) extends into the interior of the gas detection tube (103), and the connecting rotating shaft (108) is fixedly matched with the turbine blade (104) through the linkage rotating shaft (106); a plurality of warning lights (133) are also fixedly installed on the circumferential surface of the housing (110).

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