Wireless dangerous gas sampling device

Abstract

A wireless dangerous gas sampling device belongs to the technical field of sampling and comprises a wireless camera, a wireless receiving display screen, an electric drive crawler-type trolley, a sampling mechanism, a wireless remote control mechanism, a wireless receiving control mechanism and a gas supply mechanism, the wireless remote control mechanism and the wireless receiving display screen are installed in the element box, the sampling mechanism comprises an electric push rod, a supporting plate, a sampling tank and a sampling pipe, the air supply mechanism comprises an air storage tank, an air adding nozzle and a sampling mechanism, the air supply mechanism is installed on the electric drive crawler-type trolley, and the wireless receiving control mechanism is installed in an electric drive crawler-type trolley body. The sampling mode is more flexible, and a better safety effect can be achieved; in practical application, detection personnel can also control collection of accumulated liquid on the ground, and the application range is wider. Compared with an electric pump mode, the electric pump has the advantages of being lower in cost and lighter in weight, brings convenience to workers, and achieves more functions.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling equipment, in particular to a wireless hazardous gas sampling device. Background Art

[0002] In environmental protection departments and manufacturers, when toxic or harmful gases leak in relevant areas (for example, gas leaks in storage rooms where various gases are stored due to damage to the valves or cylinders), it is necessary to collect the leaked gases in the environment in order to understand the type and concentration of the leaked gases. Alternatively, it is also necessary to collect the gases in the environment in order to understand whether toxic or harmful gases are generated in areas where hazardous substances have been stored for a long time. The sampled gases will then be sent to the laboratory for physical and chemical analysis to detect various data on the gases in the corresponding sampling areas.

[0003] With technological advancements, the functionality of gas sampling equipment has also evolved. my country's authorized patent, patent number "202221773230," titled "Gas Sampling Device," states that "The present utility model provides a gas sampling device designed to address the low sampling efficiency and susceptibility of pipelines to contamination of current negative pressure gas sampling devices." As can be seen from the foregoing, while the comparative patent achieves its stated objectives to a certain extent, like other devices in the field, it suffers from structural limitations and the following technical shortcomings. First, due to structural limitations, existing gas sampling equipment is either installed in a fixed location and can only sample gas in a fixed area, or is portable and requires on-site sampling by personnel. Fixed sampling equipment is inflexible; portable sampling equipment, on the other hand, requires on-site sampling by personnel, which can expose personnel to toxic and harmful gases, potentially endangering their health. In severe cases, toxic and harmful gases can explode on-site, leading to even more serious consequences. Second, existing gas sampling equipment is limited in its functionality, capable only of collecting gas but unable to collect liquids on-site as needed. For example, it cannot collect liquids left on the ground at relevant locations that may contain volatile, hazardous gases for subsequent physical and chemical analysis. Taking all of these factors into account, it is crucial to provide a device that can conveniently sample gas or liquids without requiring on-site personnel. Utility Model Content

[0004] In order to overcome the drawback of the existing gas sampling device having a single function as described in the background technology due to structural limitations, the present invention provides a new type of wireless hazardous gas sampling device based on a tracked electric drive vehicle. During application, the staff can wirelessly control the electric drive vehicle to travel to the sampling area for sampling from a relatively long safe distance. According to needs, it can not only collect harmful gases in the relevant area, but also collect liquids on the ground in the relevant area where there is a chance of harmful gas leakage, thereby bringing convenience to the staff and realizing a wireless hazardous gas sampling device with more functions.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A wireless hazardous gas sampling device comprises a wireless camera, a wireless receiving display screen, and an electric-driven crawler trolley, characterized in that it also comprises a sampling mechanism, a wireless remote control mechanism, a wireless receiving control mechanism, and an air supply mechanism; a support seat is installed on the frame of the electric-driven crawler trolley, and the wireless camera is installed at the front end of the support seat; the wireless remote control mechanism and the wireless receiving display screen are installed in a component box, the sampling mechanism comprises an electric push rod, a support plate, a sampling tank, and a sampling tube, the lower end of the electric push rod is installed at the front upper end of the support seat, the lower end of the support plate is installed at the upper end of the electric push rod, there are multiple sampling tanks, and the upper and lower front ends and the rear end of each sampling tank are respectively installed with connecting pipes, the other sides of the three connecting pipes are respectively connected to one end of three solenoid valves, and the other end of the solenoid valve at the front end of the sampling tank is installed with an air inlet Tube, the front end of the air intake pipe of one of the solenoid valves at the front end is installed with a rear support plate, the front side of the rear support plate is installed with a rear magnet ring, the rear end of the sampling tube is installed with a front support plate, the rear end of the front support plate is installed with a front magnet ring, and the front and rear magnet rings are sucked together; the air supply mechanism includes a gas tank and a gas filling nozzle, the upper end of the gas tank is connected to one end of the fourth solenoid valve, the other end of the fourth solenoid valve is installed with a connecting pipe, the upper end of the connecting pipe and the air intake pipe of another solenoid valve at the front end of the sampling tank are connected via a hose, the gas filling nozzle is installed on the gas tank, and the gas tank is installed on the rear end of the support seat; the wireless receiving control mechanism is installed in the body of the electric drive crawler trolley; the multi-channel power output end of the wireless receiving control mechanism is electrically connected to the power input end of the electric push rod, the solenoid valve and the electric drive crawler trolley respectively.

[0007] Furthermore, an upper magnet sheet is installed on the outside of the lower end of the sampling can, and a lower magnet sheet is installed on the upper end of the support plate, and the sampling can is attracted to the support plate.

[0008] Furthermore, the solenoid valve is a normally closed valve core solenoid valve.

[0009] Furthermore, the rear end of the front magnet ring, the front end of the rear magnet ring, the upper end of the lower magnet piece, and the lower end of the upper magnet piece have opposite polarities, and the outer diameters and inner diameters are respectively consistent.

[0010] Furthermore, a contact seat is installed on the outer side of the lower end of the sampling canister, and a rubber pad is installed on the lower end of the contact seat.

[0011] Furthermore, compressed air is added into the gas storage tank through a gas filling nozzle.

[0012] Compared with the existing technology, the beneficial effects of the present invention are as follows: before sampling, the corresponding sampling can is attracted to the support plate by a magnet, and the sampling personnel can wirelessly control the electric-driven crawler vehicle from a safe distance to conduct gas sampling in the corresponding area. The sampling method is more flexible, and since the sampling personnel do not need to go to the scene to collect samples, better safety effects can be achieved. In actual applications, the inspection personnel can also control the sampling tube to move downward to contact the ground, and then collect the accumulated liquid on the ground, and the scope of application is wider. Since the present invention uses compressed gas as the driving source, it has the advantages of lower cost and lighter weight compared to the electric pump method, brings convenience to the staff, and realizes more functions. In summary, the present invention has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 、 3 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0016] Figure 1 、 2As shown in , 3, a wireless hazardous gas sampling device includes a wireless camera A1, a wireless receiving display screen XS, an electric drive crawler trolley 1, and also has a sampling mechanism, a wireless remote control mechanism 2, a wireless receiving control mechanism 3, and an air supply mechanism; a support base 101 is welded on the frame of the electric drive crawler trolley 1, and the wireless camera A1 is longitudinally installed in the middle of the front end of the support base 101, and its camera surface is located at the front side end; the wireless remote control mechanism 2 includes a battery G1, a charging socket CZ1, a component box 4, a wireless transmitting circuit module A3, a battery G1, a charging socket CZ1, a wireless transmitting circuit Module A3 and wireless receiving display screen XS (display screen interface is located outside the front opening of component box 4) are installed in component box 4, and wireless remote control mechanism 2 is carried by staff. Sampling mechanism includes electric push rod M3, support plate 5, sampling tank 6, "┌" type sampling tube 7. The lower end of the cylinder of electric push rod M3 is bolted to the middle of the front upper end of support seat 101, and the middle of the lower end of support plate 5 is welded to the upper end of the push column of electric push rod M3. There are multiple sampling tanks 6, and each sampling tank 6 has a connecting pipe interconnected with its interior welded to the middle of the front end, the upper part and the middle of the rear end respectively. The other side of the three connecting pipes is connected to three electric push rods respectively. One end of the magnetic valves DC1, DC2, and DC3 are connected by threads, and an air intake pipe is installed on the front of the front solenoid valves DC1 and DC2 respectively. The front end of the air intake pipe of the front solenoid valve DC2 is welded with a hollow annular rear support plate 8, and the front end of the rear support plate 8 is glued with an annular hollow rear permanent magnet ring 9. The rear end of the sampling tube 7 is welded with a hollow annular front support plate 10, and the rear end of the front support plate is glued with an annular hollow front permanent magnet ring 11. The front and rear magnet rings are attracted together; the air supply mechanism includes an air tank 111, a gas nozzle 112 (a bicycle inner tube gas filling nozzle). Nozzle), a branch pipe connected to the interior is welded to the middle of the front upper end of the gas tank, and the upper end of the branch pipe is threadedly connected to the lower end of the fourth solenoid valve DC4. A connecting pipe 113 is threadedly installed on the upper end of the fourth solenoid valve DC4. The upper end of the connecting pipe 113 and the air inlet pipe of the solenoid valve DC1 at the front upper end of the sampling tank are connected through a hose 114. The gas filling nozzle 112 is installed on the rear end of the gas tank 111, and the lower end of the gas filling nozzle 112 is communicated with the gas tank 111. The gas tank 111 is installed on the rear end of the support seat 101; the wireless receiving control mechanism 3 is installed on the circuit board in the electric drive crawler vehicle body 1.

[0017] Figure 1 、 2As shown in Figures 3 and 4, a rectangular upper permanent magnet 61 is welded to the lower end of the sampling canister 6, and a lower permanent magnet 51 is glued to the middle of the upper end of the support plate. The sampling canister is attracted to the lower magnet 51 by the upper magnet 61 and then mounted on the support plate. Solenoid valves DC1, DC2, DCD3, and DC4 are normally closed valve core solenoid valves. The rear end of the front magnet 11 and the front end of the rear magnet 9 are opposite, and their outer and inner diameters are identical. A hollow annular contact seat 71 is welded to the outer side of the lower end of the sampling tube, and a hollow annular sealing gasket 72 is glued to the lower end of the contact seat 71. Compressed air (1 MPa) is added to the air tank 111 through the air filling nozzle 112. In the wireless remote control mechanism, the two poles of the battery G1 and the two poles of the charging socket CZ1 (if the battery G1 is dead, an external 12V power charger can be plugged into the charging socket CZ1 to charge it), the wireless transmitting circuit module A3, and the power input terminals 1 and 2 of the wireless receiving display XS are connected by wires. The wireless receiving control mechanism includes a wireless receiving circuit module A2 and relays J1 and J2 connected via circuit board wiring. The positive power input terminal 1 of the wireless receiving circuit module A2 is connected to the positive control power input terminals of the two relays J1 and J2. The negative power input terminal 2 of the wireless receiving circuit module A2 is connected to the negative control power input terminals and negative power input terminals of the two relays J1 and J2. The 5th and 6th pins of the wireless receiving circuit module A2 are respectively connected to the positive power input terminals of the two relays J1 and J2.

[0018] Figure 1 、 2 As shown in Figures 3 and 3, the power input terminals 1 and 2 of the wireless camera A1 and the wireless receiving circuit module A2 are connected to the two poles of the battery G1 in the electric drive vehicle via wires, and the two normally open contact terminals of the relays J1 and J2 are connected to the positive and negative, and negative and positive power input terminals of the electric push rod M3 via wires; the 3 and 2 pins, and the 4 and 2 pins of the wireless receiving circuit module A2 are connected to the power input terminals of the left-side motor M1 and the right-side motor M2 of the electric drive crawler vehicle via wires; the 7 and 2 pins of the wireless receiving circuit module A2 are connected to the power input terminals of the solenoid valves DC1, DC2, DC3, and DC4 via wires (the power input terminals of the solenoid valves DC1, DC2, DC3, and DC4 and the 7 and 2 pins of the wireless receiving circuit module A2 are connected via a power plug and a power socket respectively). Figure 3Among them, battery G1 is a 12V / 10Ah lithium battery; solenoid valves DC1, DC2, DC3, and DC4 are normally closed valve core solenoid valves with a power of 1W; wireless camera A1 and wireless receiving display screen XS are wireless digital monitors and wireless receiving LCD display screen assemblies of the brand Wanguoweishi and model WG-886; wireless transmitting circuit module A3 and wireless receiving circuit module A2 are four-way wireless remote control modules and receiving module assemblies of model SJXX41-12 (the structure and function are consistent with automotive wireless remote control modules and receiving modules); electric push rod M3 is a reciprocating electric telescopic rod with a power of 10W. Figure 3 The components are all existing mature industrial products, and this application will not go into detail about their structure and working principles.

[0019] Figure 1 、 2As shown in Figure 3, before sampling, the new type of sampling can 6 is attracted to the support plate 5 by the lower permanent magnet sheet 51 and the upper magnet sheet 61. The sampling personnel can wirelessly control the electric-driven crawler trolley from a safe distance to carry out gas sampling in the corresponding area. The sampling method is more flexible, and since the sampling personnel do not need to go to the scene to collect samples, better safety effects can be achieved. Specifically, turn on the power switch S1, so that the wireless camera A1 and the wireless receiving circuit module A2 are powered and work; when sampling, the sampling personnel carry the wireless remote control mechanism with them, and the wireless camera A1 collects images in real time and transmits them wirelessly. After the wireless receiving display screen XS receives the images, its display screen interface displays the images of the corresponding area. In this way, the sampling personnel can control the forward direction of the electric-driven crawler trolley based on the video and according to needs, so that it enters the relevant sampling area. When the sampling personnel need the electric-driven crawler trolley to move forward in a straight line, they press the first transmitting button D1 and the second transmitting button D2 of the wireless transmitting circuit module A3 at the same time. Then, the wireless transmitting circuit module A3 transmits the first and second wireless closing signals at the same time. Within a range of about 1000 meters, after the wireless receiving circuit module A2 receives them, its 3rd and 4th pins simultaneously output power to the power input terminals of the left-side motor M1 and the right-side motor M2 of the electric-driven crawler trolley 1. Then, the motors M1 and M2 are energized at the same time and work through the matching gear reduction mechanism, etc., to drive the upper parts of the tracks on both sides of the electric-driven crawler trolley to move counterclockwise, and the electric-driven crawler trolley 1 moves forward. When the sampling personnel need the electric-driven crawler trolley to turn right or left, they press the first transmitting button D1 or the second transmitting button D2 of the wireless transmitting circuit module A3, and the wireless transmitting circuit module A3 transmits the first or second wireless closing signal. After the wireless receiving circuit module A2 receives it, its 3rd or 4th pin outputs power to the power input terminal of the left end motor M1 or the right end motor M2 of the electric-driven crawler trolley 1. Then the motor M1 or M2 is energized and works through the matching gear reduction mechanism, etc., to drive the upper part of the left or right track of the electric-driven crawler trolley to move counterclockwise, and the electric-driven crawler trolley 1 turns right or left and moves forward. When the sampling personnel presses the first transmitting button D1 or the second transmitting button D2 of the wireless transmitting circuit module A3 for the second time with their finger, the wireless transmitting circuit module A3 transmits the first or second wireless open-circuit signal. After the wireless receiving circuit module A2 receives the signal, its 3rd or 4th pin stops outputting power to the power input terminal of the left-side motor M1 or the right-side motor M2 of the electric-driven crawler trolley 1. As a result, the motor M1 or M2 loses power and stops working, and the electric-driven crawler trolley 1 stops moving forward. The electric-driven crawler trolley 1 is an existing mature technology. This application only uses it as a transport carrier for sampling. This application does not elaborate on the working principle of the electric-driven crawler trolley 1, nor does it provide any protection for its technical solution.

[0020] Figure 1 、 2As shown in Figure 3, when the sampling personnel observes the electric-driven crawler trolley 1 arriving at the sampling area (the electric-driven crawler trolley 1 can also be controlled to return to the sampling personnel after sampling) in combination with the video displayed on the wireless receiving display screen XS, when the sampling tank needs to be sampled, the sampling personnel presses the fifth transmitting button D5 of the wireless transmitting circuit module A3, and then the wireless transmitting circuit module A3 transmits the fifth wireless closing signal. After the wireless receiving circuit module A3 receives it, its 7th foot outputs power to the power input end of the four solenoid valves DC1, DC2, DC3, and DC4. The four solenoid valves DC1, DC2, DC3, and DC4 are energized to open the valve cores, and the high-compressed air output from the gas tank enters the sampling tank 6 through the solenoid valve DC4. During the process of air flowing in and out (air passes through the solenoid valve Valve DC1 flows in and DC3 flows out, generating negative pressure in the sampling tank 6), and then the air will generate negative pressure in the sampling tank, and the external air will enter the sampling tank 6 through the lower end of the sampling tube 7 and the solenoid valve DC1. Subsequently, the sampling personnel press the fifth transmitting button D5 of the wireless transmitting circuit module A3 for the second time, so that the wireless transmitting circuit module A3 transmits the fifth wireless open-circuit signal. After the wireless receiving circuit module A2 receives it, its 5th pin stops outputting power to the power input end of the solenoid valves DC1, DC2, DC3, and DC4. The solenoid valves DC1, DC2, DC3, and DC4 lose power and the valve cores are closed. In this way, the external exhaust gas will be effectively collected in the sampling tank 6 (including the air output from part of the gas storage tank, and the small amount of air will not affect subsequent detection). After the sampling personnel have the wireless-controlled electric-driven crawler vehicle 1 drive to the side, the sampling personnel remove the hose 114 and the sampling tube 7, and then remove the sampling tank 6 (unplug the power plugs and power plugs connected to all the solenoid valves). After entering the analysis laboratory, the sampling personnel connect the connecting pipe connected to the right part of the solenoid valve DC3 on the right end of the sampling tank to the air inlet hose of the gas detection equipment in the laboratory, and insert the power plug connected to the power input end of the solenoid valve DC3 on the rear side of the sampling tank into the power socket connected to the two poles of the 12V battery in the detection room. The solenoid valve DC3 on the rear side of the sampling tank is electrified and the valve core is opened. In this way, the sample gas in the sampling tank will enter the gas detection equipment for detection.Specifically, the staff can also control the collection of waste liquid on the ground of the relevant area. The sampling personnel observes the electric-drive crawler vehicle 1 arriving at the sampling area in combination with the video displayed on the wireless receiving display screen XS. The sampling personnel press the third transmitting button D3 of the wireless transmitting circuit module A3, and then the wireless transmitting circuit module A3 transmits the third wireless closing signal. After the wireless receiving circuit module A3 receives it, its 5-pin outputs power to the power input end of the relay J1. The relay J1 is energized and its control power input end and the normally open contact end are closed. The positive and negative power input ends of the electric push rod M3 are energized, and its push column pushes the sampling tank 6 and the sampling tube 7 downward. After the contact seat and the rubber pad at the lower end of the sampling tube touch the ground (slightly separated by a certain distance), the sampling personnel press the third transmitting button D3 of the wireless transmitting circuit module A3 for the second time with their finger. The wireless transmitting circuit module A3 transmits the third wireless opening signal. After the wireless receiving circuit module A2 receives it, its 5-pin stops outputting power, and then the electric push rod M3 loses power and no longer works. Subsequently, the sampling personnel presses the fifth transmitting button D5 of the wireless transmitting circuit module A3, just like the gas sampling, and the wireless transmitting circuit module A3 transmits the fifth wireless closing signal (the valve cores of the four solenoid valves are energized and open). The compressed air output by the gas tank 111 generates negative pressure in the sampling tank 6, drawing the liquid on the ground into the sampling tank. Finally, the sampling personnel again presses the fifth transmitting button D5 of the wireless transmitting circuit module A3, and the wireless transmitting circuit module A3 transmits the third wireless opening signal (the valve cores of the four solenoid valves are de-energized and close). After sampling the ground and other liquids, the sampling personnel press the fourth transmitting button D4 of the wireless transmitting circuit module A3, so that the wireless transmitting circuit module A3 transmits the fourth wireless closing signal. After the wireless receiving circuit module A3 receives it, its 6-pin outputs power to the power input end of the relay J2. The relay J2 is energized and its control power input end and the normally open contact end are closed. The negative and positive power input ends of the electric push rod M3 are energized, and its push column pushes the sampling tank 6 and the sampling tube 7 upward, and the lower end of the sampling tube is separated from the ground. After the sampling personnel presses the fourth transmitting button D4 of the wireless transmitting circuit module A3 for the second time with his finger, the wireless transmitting circuit module A3 transmits the fourth wireless opening signal. After the wireless receiving circuit module A2 receives it, its 6-pin stops outputting power, and then the electric push rod M3 loses power and no longer works (the distance between the lower end of the sampling tube and the ground is mainly to facilitate the staff to control the trolley body to return to work). After entering the analytical laboratory, connect the connecting pipe connected to the right side of the solenoid valve DC4 on the right end of the sampling tank and the liquid inlet hose of the liquid detection equipment in the laboratory, and insert the power plug connected to the power input end of the solenoid valve DC3 on the back side of the sampling tank into the power socket connected to the two poles of the 12V battery in the detection room. The solenoid valve DC3 on the back side of the sampling tank will be electrified and the valve core will open. In this way, the waste liquid in the sampling tank will enter the gas detection equipment for detection.

[0021] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included in the present invention.

[0022] In addition, it should be understood that although this specification is described in terms of implementation methods, the implementation methods do not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A wireless hazardous gas sampling device, comprising a wireless camera, a wireless receiving display screen, and an electric drive crawler vehicle, characterized in that: The vehicle also has a sampling mechanism, a wireless remote control mechanism, a wireless receiving control mechanism, and an air supply mechanism; a support seat is installed on the frame of the electric drive crawler trolley, and a wireless camera is installed at the front end of the support seat; the wireless remote control mechanism and the wireless receiving display screen are installed in the component box, and the sampling mechanism includes an electric push rod, a support plate, a sampling tank, and a sampling tube. The lower end of the electric push rod is installed at the front upper end of the support seat, and the lower end of the support plate is installed at the upper end of the electric push rod. There are multiple sampling tanks, and the upper and lower parts and the rear end of the front end of each sampling tank are respectively installed with connecting pipes, and the other sides of the three connecting pipes are respectively connected to one end of the three solenoid valves. An air intake pipe is installed at the other end of the solenoid valve at the front end of the sampling tank, and the front side end of the air intake pipe of one of the solenoid valves at the front end is installed. The rear support plate has a rear magnet ring installed on the front side of the rear support plate, the rear end of the sampling tube is installed with a front support plate, the rear end of the front support plate is installed with a front magnet ring, and the front and rear magnet rings are attracted together; the air supply mechanism includes an air tank and an air filling nozzle, the upper end of the air tank is connected to one end of the fourth solenoid valve, the other end of the fourth solenoid valve is installed with a connecting pipe, the upper end of the connecting pipe and the air inlet pipe of another solenoid valve at the front end of the sampling tank are connected via a hose, the air filling nozzle is installed on the air tank, and the air tank is installed on the rear end of the support seat; the wireless receiving control mechanism is installed in the body of the electric drive crawler trolley; the multi-channel power output end of the wireless receiving control mechanism is electrically connected to the power input end of the electric push rod, the solenoid valve and the electric drive crawler trolley respectively.

2. A wireless hazardous gas sampling device according to claim 1, characterized in that: An upper magnet piece is installed on the outer side of the lower end of the sampling canister, a lower magnet piece is installed on the upper end of the support plate, and the sampling canister is attracted to the support plate.

3. A wireless hazardous gas sampling device according to claim 1, characterized in that: The solenoid valve is a normally closed spool solenoid valve.

4. A wireless hazardous gas sampling device according to claim 1, characterized in that: The rear end of the front magnet ring, the front end of the rear magnet ring, the upper end of the lower magnet piece, and the lower end of the upper magnet piece have opposite polarities, and the outer diameters and inner diameters are respectively consistent.

5. The wireless hazardous gas sampling device according to claim 1, characterized in that: A contact seat is installed on the outer side of the lower end of the sampling tank, and a rubber pad is installed on the lower end of the contact seat.

6. A wireless hazardous gas sampling device according to claim 1, characterized in that: Compressed air is added into the gas tank through the gas filling nozzle.

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