A natural gas sampling and detection device convenient for sampling

Abstract

The present invention discloses a natural gas sampling and detection device which is convenient for sampling, comprising a handheld box, a display screen is provided on the outer side of the handheld box, a hollow reel is rotatably connected inside the handheld box, a gas collecting pipe is wound on the outer side of the hollow reel, and one end of the gas collecting pipe is connected to the hollow reel, and the other end of the gas collecting pipe is connected to a handle. When the present invention is in use, the staff can directly clamp the device on their waist, stretch the gas collecting pipe through the handle to detect the pipeline to be detected, and at the same time, the gas collecting pipe is automatically collected through a second spring. The staff does not need to take off the device and hold it in their hands, and the gas collecting pipe can be automatically collected, thereby reducing the staff's work intensity. At the same time, the gas is dried during gas extraction to prevent water vapor in the gas from hindering the effective contact between the natural gas and the detection instrument and affecting the detection instrument. The capacity of each gas extraction can also be uniformly controlled to improve the accuracy of detection.

Description

Technical Field

[0001] The present invention relates to the technical field of gas sampling, and in particular to a natural gas sampling and detection device which is convenient for sampling. Background Art

[0002] Natural gas is a multi-component mixed gaseous fossil fuel, and it is also an efficient and clean energy. With the advancement of industrialization and the increasing demand for natural gas in daily life, people pay more and more attention to natural gas.

[0003] In daily life, residents use natural gas for heating, cooking, and hot water supply. Due to its convenient energy supply and efficient combustion, the use of natural gas is becoming more and more common. In daily use, due to aging or damage of pipelines, or malfunctions of gas stoves, water heaters, etc., natural gas leaks may occur. Natural gas itself is a colorless and odorless gas, and people cannot directly observe its leakage with the naked eye or smell. In addition, the concentration of leaked gas is low, not enough to cause obvious signs. Therefore, staff are required to use portable natural gas sampling devices to detect whether there is a natural gas leak in the pipeline.

[0004] However, existing natural gas detection devices usually require manual movement of the device's air intake port to a designated position for detection during use. During the detection process, since the gas flow cannot be directly observed manually, the volume of gas extracted each time is not fixed, which makes the detection inaccurate. At the same time, when staff members detect pipes in bathrooms or relatively humid spaces, the high moisture content in the air will hinder the effective contact between natural gas and the detection instrument, reducing the sensitivity of the detection. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a natural gas sampling and detection device that is convenient for sampling.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A natural gas sampling and detection device convenient for sampling, comprising a handheld box and a display screen arranged on the outside of the handheld box, wherein a hollow reel is rotatably connected inside the handheld box, a gas collecting pipe is wound on the outside of the hollow reel, and one end of the gas collecting pipe is connected to the hollow reel, and the other end of the gas collecting pipe is connected to a handle, and the handle is clamped on the outside of the handheld box;

[0008] A fixing seat is fixedly installed on the inner wall of the handheld box, a second spring is arranged in the fixing seat, and a hollow reel is rotatably connected to the side of the fixing seat and connected to the second spring, a detection cavity is arranged in the handheld box, and the hollow reel is connected to the detection cavity, and an L-shaped working chamber is arranged in the handheld box;

[0009] An air collecting mechanism is provided in the detection chamber, and the air collecting mechanism is connected to the hollow reel; a drying box is provided in the L-shaped working chamber, and the hollow reel is connected to the drying box;

[0010] The drying box is provided with a drying mechanism, and the drying box is connected to an L-shaped working chamber. The bottom surface of the drying box is connected to a conical cover with an opening at the bottom. A detection head is fixedly installed on the bottom wall of the L-shaped working chamber, and the detection head is located at the bottom opening of the conical cover.

[0011] Preferably, the gas collecting mechanism comprises a vacuum box, and the vacuum box is fixedly installed in the detection chamber, a threaded rod is rotatably connected in the vacuum box, and the threaded rod penetrates the vacuum box and the side wall of the detection chamber and extends outward;

[0012] A transmission gear is installed at one end of the threaded rod, a baffle is fixedly installed at the other end of the threaded rod, a spring seat is connected to the threaded rod, and the spring seat is fixedly installed on the side of the detection chamber, and the spring seat 12 is connected to the threaded rod through a first spring;

[0013] The hollow reel is provided with a driving gear through a one-way bearing, and the driving gear is meshed with the transmission gear. A pressing plate is threadedly connected to the threaded rod, and the pressing plate is slidably connected in the vacuum box.

[0014] The bottom surface of the pressing plate is bonded with an air bag, and the other side of the air bag away from the pressing plate is bonded to the bottom surface of the air pumping box, and the air bag is connected with the inside of the L-shaped working chamber.

[0015] Preferably, the drying mechanism includes an impeller, and the impeller is rotatably connected in the drying box, and the height of the impeller is greater than the height of the connection point between the hollow scroll and the drying box. A plurality of adsorption pads are provided on the side wall of the drying box, and the material of each adsorption pad is activated carbon.

[0016] Preferably, a plurality of activated carbon plates are fixedly installed in the drying box, a rotating shaft is rotatably connected to the top surface of the drying box, a coil is fixedly installed on the top surface of the drying box, and the coil is sleeved outside the rotating shaft, and the coil does not contact the rotating shaft;

[0017] A driven gear is installed on the top of the rotating shaft, a driving gear is installed on the hollow reel, and the driving gear is meshed with the driven gear;

[0018] Two bar magnets are symmetrically installed on the bottom surface of the driven gear, and the magnetic poles of the two bar magnets are opposite, and each bar magnet is located outside the coil. A resistance wire is installed in each activated carbon plate, and each resistance wire is electrically connected to the coil.

[0019] Preferably, a card slot is provided on the hollow reel and the detection cavity, an arc-shaped plate is slidably connected to the inner wall of the detection cavity, and a card pin is fixedly installed on the top surface of the arc-shaped plate;

[0020] The inner wall of the detection cavity is symmetrically slidably connected to two sliders, an extension rod is fixedly installed on the side of each slider, and the other end of each extension rod is fixedly installed on the side of the arc plate.

[0021] Preferably, a generator is fixedly installed in the handheld box, and the connecting shaft of the generator is rotatably connected to the fixed seat, and the generator is connected to the hollow reel through a coupling. A battery is fixedly installed in the handheld box, and the battery and the generator are electrically connected.

[0022] Preferably, the pitch circle diameter of the driven gear is smaller than the pitch circle diameter of the driving gear, and the pitch circle diameter of the transmission gear is smaller than the pitch circle diameter of the driving gear.

[0023] Preferably, a rotating joint is installed at one end of the hollow scroll, and the rotating joint is fixedly installed on the top surface of the detection cavity. The hollow scroll passes through the detection cavity and extends inward. The pressure plate is in the shape of a U-shape, and the threaded rod passes through one side of the pressure plate and is threadedly connected to the pressure plate. The inner cavity of the vacuum box is square in shape.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The gas collecting pipe is rolled up on the hollow reel, and the hollow reel is connected to the second spring. The staff can directly clamp the device on the waist, stretch the gas collecting pipe through the handle to detect the pipeline to be inspected, and realize the automatic collection of the gas collecting pipe through the second spring. The staff does not need to take off the device and hold it in their hands. At the same time, the gas collecting pipe can be automatically collected, reducing the work intensity of the staff.

[0026] 2. Through the setting of the gas collecting mechanism, the air in the device is discharged while the gas collecting pipe is stretched to avoid residual gas affecting the detection accuracy.

[0027] 3. Through the settings of the drying box and rotating plate, when the gas passes through the drying box, the gas blows the rotating plate to rotate, thereby disturbing the gas to stay in the drying box, so that the multiple adsorption pads on the side wall of the drying box adsorb the water vapor in the gas, avoiding the water vapor in the gas from hindering the effective contact between the natural gas and the detection instrument and affecting the detection instrument.

[0028] 4. Through the settings of arc plates, telescopic rods, springs, etc., when the gas collecting pipe is extended to the limit distance, the hollow scroll is stationary, and the gas enters the hollow scroll from the outside and then passes through the arc plate, causing the arc plate to lift upward, and is locked in the slot opened in the detection chamber through a bayonet pin, thereby limiting the rotation of the hollow scroll, and the gas collecting pipe cannot be contracted, thereby reminding the staff that the gas extraction process is still in progress, thereby achieving uniform capacity of gas extraction and ensuring the accuracy of the detection.

[0029] 5. Through the arrangement of generators, batteries and the like, during the rotation of the hollow reel, the connecting shaft of the generator can be driven to rotate, thereby charging the battery and increasing the battery life.

[0030] 6. Through the settings of activated carbon plate, coil, bar magnet, resistance wire, etc., the driven gear rotates and drives the magnetic flux lines formed by two bar magnets with opposite magnetic poles to quickly cut the coil, thereby changing the magnetic flux in the coil. A closed circuit is formed by the resistance wire and the coil, and the coil generates an induced electromotive force, which drives the current in the coil to flow in the closed circuit. Then the resistance wire is energized to generate heat to dry the activated carbon plate, thereby increasing the service life of the activated carbon plate and reducing the number of replacements. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the first embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the internal structure of the detection chamber according to the first embodiment of the present invention;

[0034] Figure 4 This is a cross-sectional structural diagram of the second embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the cross-sectional structure of an activated carbon plate according to the second embodiment of the present invention;

[0036] Figure 6 The present invention provides a cross-sectional structural schematic diagram of the third embodiment;

[0037] Figure 7 The present invention provides a schematic cross-sectional structure diagram of a fourth embodiment.

[0038] In the figure: 1 handheld box, 2 display screen, 3 grip, 4 battery, 5 fixed base, 6 air collecting pipe, 7 hollow scroll, 8 generator, 9 driving gear, 10 transmission gear, 11 detection chamber, 12 spring seat, 13 rotary joint, 14 vacuum box, 15 pressure plate, 16 threaded rod, 17 baffle, 18 conical cover, 19 detection head, 20 driven gear, 21 bar magnet, 22 rotating shaft, 23 coil, 24 activated carbon plate, 25 slot, 26 bayonet, 27 arc plate, 28 slider, 29 extension rod, 30 resistance wire, 31 air bag, 32 adsorption pad, 33 drying box, 34 driving gear, 35 L-shaped studio, 36 impeller. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0041] Embodiment 1:

[0042] Reference Figure 1-3 A natural gas sampling and detection device convenient for sampling comprises a handheld box 1, a display screen 2 is arranged on the outside of the handheld box 1, and the detection result on the detection head 19 is displayed through the display screen 2, a hollow reel 7 is rotatably connected in the handheld box 1, a gas collecting pipe 6 is wound on the outside of the hollow reel 7, and one end of the gas collecting pipe 6 is connected to the hollow reel 7, and the other end of the gas collecting pipe 6 is connected to a handle 3, which is convenient for contracting the gas collecting pipe 6, and the handle 3 is clamped on the outside of the handheld box 1, and a fixed The holder 5 is provided with a second spring in the fixed holder 5, and the hollow reel 7 is rotatably connected to the side of the fixed holder 5 and connected to the second spring, so that the user can extend the gas collecting pipe 6 to the vicinity of the pipeline to be detected by holding the handle 3, and at the same time pull the second spring connected to the hollow reel 7 to store power, which is convenient for the automatic contraction of the gas collecting pipe 6, and reduces the manual winding and placement time of the gas collecting pipe 6. A detection chamber 11 is provided in the hand-held box 1, and the hollow reel 7 is connected to the detection chamber 11, and an L-shaped working chamber 35 is provided in the hand-held box 1;

[0043] An air collecting mechanism is provided in the detection chamber 11, and the air collecting mechanism is connected to the hollow reel 7. The air collecting mechanism includes an air pumping box 14, and the air pumping box 14 is fixedly installed in the detection chamber 11. A threaded rod 16 is rotatably connected in the air pumping box 14, and the threaded rod 16 penetrates the air pumping box 14 and the side wall of the detection chamber 11 and extends outward. A transmission gear 10 is installed at one end of the threaded rod 16, and a baffle 17 is fixedly installed at the other end of the threaded rod 16. A spring seat 12 is connected to the threaded rod 16, and the spring seat 12 is fixedly installed on the detection chamber 11. On the side of the measuring cavity 11, the spring seat 12 is connected to the threaded rod 16 through the first spring, a one-way bearing is installed on the hollow reel 7, a driving gear 9 is installed on the one-way bearing, and the driving gear 9 is meshed with the transmission gear 10, a pressing plate 15 is threadedly connected to the threaded rod 16, and the pressing plate 15 is slidably connected in the vacuum box 14, an airbag 31 is bonded to the bottom surface of the pressing plate 15, and the other side of the airbag 31 away from the pressing plate 15 is bonded to the bottom surface of the vacuum box 14, and the airbag 31 is connected to the inside of the L-shaped working room 35;

[0044] It should be noted that when the staff uses the handle 3 to take out the gas collecting pipe 6 and point it to the pipeline to be tested, the driving gear 9 is meshed with the transmission gear 10, thereby driving the threaded rod 16 to rotate, and at the same time driving and threadedly connected pressure plate 15 to squeeze the airbag 31, thereby causing the airbag 31 to contract and discharge the gas outward, and then in the process of taking out the gas collecting pipe 6, the gas in the device is discharged to reduce the residual gas affecting the accuracy of this detection, and at the same time, it is connected to the spring seat 12 through the threaded rod 16, and when the threaded rod 16 rotates, the spring seat 12 is When the air collecting pipe 6 is extended and retracted to the limit distance, the spring seat 12 completes the power storage. At this time, the hollow reel 7 is in a stationary state, and a one-way bearing is installed on the hollow reel 7, and the driving gear 9 is installed on the one-way bearing. Then, the first spring in the spring seat 12 is released to drive the transmission gear 10 to rotate in the opposite direction, and drives the driving gear 9 to rotate on the hollow reel 7 without being affected by the hollow reel 7, and then drives the pressure plate 15 to rise upward, drives the airbag 31 to expand, absorbs gas through the air collecting pipe 6, and then enters the L-shaped working room 35, and is detected by the detection head 19;

[0045] A drying box 33 is provided in the L-shaped studio 35, and the hollow reel 7 is connected to the drying box 33. A drying mechanism is provided in the drying box 33, and the drying mechanism includes an impeller 36, and the impeller 36 is rotatably connected in the drying box 33, and the height of the impeller 36 is greater than the height of the connection point between the hollow reel 7 and the drying box 33. A plurality of adsorption pads 32 are provided on the side wall of the drying box 33, and the material of each adsorption pad 32 is activated carbon, and the drying box 33 is connected to the L-shaped studio 35. The bottom surface of the drying box 33 is connected to a conical cover 18 with an opening at the bottom, and a detection head 19 is fixedly installed on the bottom wall of the L-shaped studio 35, and the detection head 19 is located at the bottom opening of the conical cover 18, and the flow rate of the incoming gas is increased through the conical cover 18, so that the detection of the detection head 19 is more accurate;

[0046] It should be noted that the impeller 36 is made of lightweight material, and the blades of the impeller 36 drive the impeller 36 to rotate through the gas entering the connection between the hollow scroll 7 and the drying box 33, and then the impeller 36 disturbs the inside of the drying box 33, so that the gas entering the drying box 33 can absorb moisture as much as possible through the adsorption pad 32, so as to improve the detection accuracy.

[0047] Furthermore, the pitch circle diameter of the transmission gear 10 is smaller than the pitch circle diameter of the driving gear 9 , thereby reducing the transmission ratio, so that the threaded rod 16 rotates quickly, accelerating the compression and release of the airbag 31 .

[0048] It should be noted that the pressure plate 15 is in the shape of a U, and the threaded rod 16 passes through one side of the pressure plate 15 and is threadedly connected to the pressure plate 15. The inner cavity of the vacuum box 14 is in the shape of a square, and the pressure plate 15 is limited by the inner wall of the vacuum box 14 so that it can only move linearly but not rotate.

[0049] Embodiment 2:

[0050] Reference Figure 4-5 A natural gas sampling and detection device that is convenient for sampling, a plurality of activated carbon plates 24 are fixedly installed in a drying box 33, and the gas passing through the drying box 33 is dried by the activated carbon plates 24, the top surface of the drying box 33 is rotatably connected with a rotating shaft 22, a coil 23 is fixedly installed on the top surface of the drying box 33, and the coil 23 is sleeved on the outside of the rotating shaft 22, a driven gear 20 is installed on the top of the rotating shaft 22, a driving gear 34 is installed on the hollow scroll 7, and the driving gear 34 is meshed with the driven gear 20, two bar magnets 21 are symmetrically installed on the bottom surface of the driven gear 20, and the magnetic poles of the two bar magnets 21 are opposite, and each bar magnet 21 is located outside the coil 23, and a resistance wire 30 is installed in each activated carbon plate 24, and each resistance wire 30 is electrically connected to the coil 23.

[0051] It should be noted that the driven gear 20 is driven to rotate by the driving gear 34, and then the two bar magnets 21 symmetrically installed on the bottom surface of the driven gear 20 are driven to rotate. It is worth noting that when the rotating shaft 22 and the bar magnet 21 rotate, the coil 23 does not rotate, and then the magnetic flux lines formed by the two bar magnets 21 quickly cut the coil 23, and then the magnetic flux in the coil 23 is transformed, and a closed circuit is formed by the resistance wire 30 and the coil 23, and then the induced electromotive force generated by the coil 23 starts the current formed in the coil 23 to flow in the closed circuit, and then drives the resistance wire 30 to generate heat, and the activated carbon plate 24 corresponding to the position is dried, thereby increasing the service life of the activated carbon plate 24 and reducing the number of replacements.

[0052] Furthermore, the pitch circle diameter of the driven gear 20 is smaller than the pitch circle diameter of the driving gear 34, thereby reducing the transmission ratio, causing the driven gear 20 to rotate quickly, thereby driving the rotating shaft 22 to rotate quickly, increasing the number of times the magnetic flux lines cut the coil 23, and thereby increasing the generation of induced electromotive force.

[0053] Embodiment three:

[0054] Reference Figure 6 A natural gas sampling and detection device that is convenient for sampling, a card slot 25 is opened on the hollow scroll 7 and the detection chamber 11, an arc plate 27 is slidably connected to the inner wall of the detection chamber 11, a card pin 26 is fixedly installed on the top surface of the arc plate 27, and two sliders 28 are symmetrically slidably connected to the inner wall of the detection chamber 11, an extension rod 29 is fixedly installed on the side of each slider 28, and the other end of each extension rod 29 is fixedly installed on the side of the arc plate 27.

[0055] It should be noted that the upper surface of the arc plate 27 is convex and the lower surface is concave inward. When the gas collecting pipe 6 is extended and retracted to the limit distance, the hollow scroll 7 is stationary. At this time, the external gas is extracted through the gas collecting pipe 6. When the gas passes through the arc plate 27, the airflow is divided into two parts, an upper part and an lower part, by the arc plate 27. In the same time, the distance of the airflow above the arc plate 27 is longer, so the speed is higher, and the pressure it exerts on the arc plate 27 is smaller; the distance of the airflow below is shorter, so the speed is lower, and the pressure it exerts on the arc plate 27 is larger. Therefore, there is a pressure difference between the upper and lower surfaces of the arc plate 27, which makes The arc plate 27 generates an upward lift, and at the same time, the channel inside the hollow scroll 7 is gradually contracted from one end of the handle 3, thereby increasing the flow rate of the airflow entering the hollow scroll 7, thereby increasing the upward lifting force of the arc plate 27, driving the latch 26 to be locked in the slot 25 provided on the detection chamber 11, thereby limiting the rotation of the hollow scroll 7. When the airbag 31 is not expanded to the maximum position, the hollow scroll 7 cannot rotate, and the gas collecting pipe 6 cannot be recovered. By limiting the rotation of the hollow scroll 7, the staff's inspection time for the pipeline is controlled, thereby facilitating improving the detection accuracy of the detection head 19.

[0056] Embodiment 4:

[0057] Reference Figure 7 A natural gas sampling and detection device that is convenient for sampling, a generator 8 is fixedly installed in a handheld box 1, and the connecting shaft of the generator 8 is rotatably connected to the fixing seat 5, and the generator 8 is connected to the hollow reel 7 through a coupling, a battery 4 is fixedly installed in the handheld box 1, and the battery 4 and the generator 8 are electrically connected, increasing the rotation of the connecting shaft of the generator 8 driven by the rotation of the hollow reel 7, and at the same time, a gear speed increasing mechanism is provided in the coupling, thereby increasing the rotation of the connecting shaft of the generator 8, so that the speed and torque of the connecting shaft can meet the working requirements of the generator 8, thereby realizing the charging of the battery 4, increasing the battery life of the battery 4, and increasing the utilization of energy.

[0058] The functional principle of the present invention can be explained through the following operation mode: the staff puts the device on the waist, and when it is necessary to detect whether there is a natural gas leak in the gas near the pipeline, the handle 3 can be used to extend the gas collecting pipe 6. During the extension of the gas collecting pipe 6, the hollow reel 7 in the handheld box 1 is driven to rotate, and then the threaded rod 16 is driven to rotate. The pressure plate 15 is threadedly connected to the threaded rod 16, thereby compressing the air bag 31, and then the gas in the device is emptied during the extension process;

[0059] Then, when the gas collecting pipe 6 is extended to the pipeline, the hollow reel 7 stops rotating, and the force stored in the spring seat 12 during the extension process is released, thereby driving the threaded rod 16 to rotate in the reverse direction, so that the air bag 31 is expanded, and the gas is extracted from the port of the gas collecting pipe 6;

[0060] During the gas extraction process, the gas passes through the arc plate 27, thereby driving the arc plate 27 to lift up, and the latch 26 on the arc plate 27 is locked in the slot 25 provided on the detection chamber 11, thereby locking the hollow scroll 7 to prevent it from rotating, and the gas collecting pipe 6 cannot be retracted, thereby reminding the staff that the gas extraction process is still in progress and unifying the detection time;

[0061] When the gas enters the detection chamber 11, the gas blows onto the blades of the impeller 36 through the drying box 33 provided in the detection chamber 11, thereby driving the impeller 36 to rotate, and disturbing the gas passing through the drying box 33, so that the multiple adsorption pads 32 installed on the side wall of the drying box 33 dry the gas, making the detection of the detection head 19 more accurate.

[0062] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A natural gas sampling and detection device for facilitating sampling, comprising a handheld box (1) and a display screen (2) arranged on the outside of the handheld box (1), characterized in that: A hollow reel (7) is rotatably connected inside the handheld box (1), an air collecting pipe (6) is wound around the outside of the hollow reel (7), and one end of the air collecting pipe (6) is connected to the hollow reel (7), a card slot (25) is provided on both the hollow reel (7) and the detection chamber (11), an arc plate (27) is slidably connected to the inner wall of the detection chamber (11), and a card pin (26) is fixedly installed on the top surface of the arc plate (27); The inner wall of the detection chamber (11) is symmetrically slidably connected to two sliders (28), an extension rod (29) is fixedly mounted on the side of each slider (28), and the other end of each extension rod (29) is fixedly mounted on the side of the arc plate (27), the other end of the gas collecting pipe (6) is connected to a handle (3), and the handle (3) is clamped on the outside of the handheld box (1); A fixing seat (5) is fixedly mounted on the inner wall of the handheld box (1), a second spring is arranged in the fixing seat (5), and a hollow reel (7) is rotatably connected to a side of the fixing seat (5) and connected to the second spring, a detection cavity (11) is arranged in the handheld box (1), and the hollow reel (7) is connected to the detection cavity (11), and an L-shaped working chamber (35) is arranged in the handheld box (1); An air collecting mechanism is provided in the detection chamber (11), and the air collecting mechanism is connected to the hollow scroll (7), the air collecting mechanism comprises an air pumping box (14), and the air pumping box (14) is fixedly installed in the detection chamber (11), a threaded rod (16) is rotatably connected in the air pumping box (14), and the threaded rod (16) penetrates the air pumping box (14) and the side wall of the detection chamber (11) and extends outwards; A transmission gear (10) is mounted on one end of the threaded rod (16), a baffle (17) is fixedly mounted on the other end of the threaded rod (16), a spring seat (12) is connected to the threaded rod (16), and the spring seat (12) is fixedly mounted on a side of the detection chamber (11), and the spring seat (12) is connected to the threaded rod (16) via a first spring; The hollow reel (7) is mounted with a driving gear (9) via a one-way bearing, and the driving gear (9) is meshed with a transmission gear (10); a pressing plate (15) is threadedly connected to the threaded rod (16), and the pressing plate (15) is slidably connected to the inside of the vacuum box (14); The bottom surface of the pressing plate (15) is bonded with an air bag (31), and the other side of the air bag (31) away from the pressing plate (15) is bonded to the bottom surface of the vacuum box (14), and the air bag (31) is connected to the inside of the L-shaped working chamber (35); A drying box (33) is provided in the L-shaped working room (35), and the hollow reel (7) is connected to the drying box (33); The drying box (33) is provided with a drying mechanism, and the drying box (33) is connected to the L-shaped working chamber (35). The drying mechanism includes an impeller (36), and the impeller (36) is rotatably connected to the drying box (33). The height of the impeller (36) is greater than the height of the connection point between the hollow scroll (7) and the drying box (33). A plurality of adsorption pads (32) are provided on the side wall of the drying box (33), and the material of each of the adsorption pads (32) is activated carbon; A plurality of activated carbon plates (24) are fixedly mounted in the drying box (33); a rotating shaft (22) is rotatably connected to the top surface of the drying box (33); a coil (23) is fixedly mounted on the top surface of the drying box (33); the coil (23) is sleeved outside the rotating shaft (22), and the coil (23) does not contact the rotating shaft (22); A driven gear (20) is mounted on the top of the rotating shaft (22), a driving gear (34) is mounted on the hollow reel (7), and the driving gear (34) is meshed with the driven gear (20); Two bar magnets (21) are symmetrically mounted on the bottom surface of the driven gear (20), and the magnetic poles of the two bar magnets (21) are opposite, and each bar magnet (21) is located outside the coil (23), and a resistance wire (30) is mounted in each of the activated carbon plates (24), and each resistance wire (30) is electrically connected to the coil (23); The bottom surface of the drying box (33) is connected to a conical cover (18) having an opening at the bottom, and a detection head (19) is fixedly mounted on the bottom wall of the L-shaped working chamber (35), and the detection head (19) is located at the bottom opening of the conical cover (18).

2. A natural gas sampling and detection device for facilitating sampling according to claim 1, characterized in that: A generator (8) is fixedly installed in the handheld box (1), and a connecting shaft of the generator (8) is rotatably connected to the fixing seat (5), and the generator (8) is connected to the hollow reel (7) via a coupling. A storage battery (4) is fixedly installed in the handheld box (1), and the storage battery (4) and the generator (8) are electrically connected.

3. A natural gas sampling and detection device for facilitating sampling according to claim 1, characterized in that: The pitch circle diameter of the driven gear (20) is smaller than the pitch circle diameter of the driving gear (34), and the pitch circle diameter of the transmission gear (10) is smaller than the pitch circle diameter of the driving gear (9).

4. A natural gas sampling and detection device for facilitating sampling according to claim 1, characterized in that: A rotating joint (13) is installed at one end of the hollow reel (7), and the rotating joint (13) is fixedly installed on the top surface of the detection cavity (11); the hollow reel (7) passes through the detection cavity (11) and extends inwardly; the pressure plate (15) is in the shape of a square, and the threaded rod (16) passes through one side of the pressure plate (15) and is threadedly connected to the pressure plate (15); the inner cavity of the vacuum box (14) is in the shape of a square.

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