A portable sampling device for detecting air particulate matter

Abstract

The present invention discloses a portable sampling device for detecting air particulate matter, which relates to the field of air sampling technology, including a sampling mechanism and a range adjustment mechanism. The sampling box is provided with a range adjustment mechanism, and the range adjustment mechanism is provided with a flow rate adjustment mechanism for adjusting the air flow rate during sampling. The sampling box and the range adjustment mechanism are jointly provided with a locking mechanism for enhancing connection stability, and the sampling box and the locking mechanism are jointly provided with a supporting mechanism. The present invention cooperates with the sampling mechanism, the range adjustment mechanism and the locking mechanism to allow air of different ranges to enter the flexible pipe, the absorption bottle and the drying bottle, thereby expanding the sampling range and improving the representativeness and accuracy of the detection data; the range adjustment mechanism and the flow rate adjustment mechanism cooperate to slow down the flow rate of air through the flexible pipe, so that the air can fully contact with the adsorbent in the absorption bottle and the drying bottle, thereby preventing the penetration effect caused by excessive flow rate and resulting in insufficient sampling.

Description

Technical Field

[0001] The present invention relates to the technical field of air sampling, and in particular to a portable sampling device for detecting air particles. Background Art

[0002] Air particulate matter refers to a mixture of tiny particles and droplets suspended in the air. These particulate matter can be produced by a variety of sources, including natural sources such as volcanic eruptions and wind erosion, as well as human sources such as the burning of fossil fuels, industrial production processes, construction activities and transportation. Air particulate matter sampling equipment is used to collect and measure the concentration of particulate matter in the air. It is used to monitor air quality, study the source and composition of particulate matter, and evaluate its impact on human health.

[0003] The current portable sampling equipment for air particulate matter adopts a detachable structure for easy carrying and is suitable for rapid on-site detection or temporary monitoring tasks. The sampling box is detachably equipped with an absorption bottle and a drying bottle. The air passes through the absorption bottle and the drying bottle in turn and enters the sampling box. The absorption bottle dissolves part of the target pollutants into the liquid. After sampling, the liquid is analyzed and the drying bottle is dehumidified. Multiple groups of samples are taken simultaneously directly through the air inlet of the absorption bottle. However, the distance between the air inlets is relatively close, resulting in a small sampling range, and the representativeness and accuracy of the data need to be improved; secondly, it is not convenient to adjust the flow rate of the air in the pipeline during direct sampling. Excessive flow rate will cause a penetration effect between the air and the adsorbent, which is not conducive to full contact between the air and the adsorbent; thirdly, when sampling in different directions, it is necessary to set up separate sampling equipment in different directions, or to perform separate sampling in different directions through the same equipment. The former requires preparation of multiple devices, and the sampling efficiency of the latter needs to be improved.

[0004] Therefore, in order to improve the representativeness and accuracy of data and avoid the penetration effect, the present invention provides a portable sampling device for detecting air particulate matter. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art and to propose a portable sampling device for detecting air particulate matter.

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

[0007] A portable sampling device for detecting air particulate matter includes a sampling mechanism and a range adjustment mechanism. The sampling mechanism includes a sampling box, and a handle facing forward and backward is fixedly connected to the middle of the top wall of the sampling box. Three absorption bottles evenly distributed front to back are detachably installed on the left and right sides of the top wall of the sampling box, and an external support frame is symmetrically hinged on the side walls of the sampling box. Three drying bottles corresponding to the absorption bottles are detachably installed on the external support frame.

[0008] The sampling box is provided with a range adjustment mechanism, and the range adjustment mechanism is provided with a flow rate adjustment mechanism for adjusting the air flow rate during sampling. The sampling box and the range adjustment mechanism are jointly provided with a locking mechanism for enhancing the connection stability, and the sampling box and the locking mechanism are jointly provided with a support mechanism, which includes a rotating component that is connected to the sampling box for changing direction sampling and a foldable and deformable support component.

[0009] The range adjustment mechanism includes a support member that is symmetrically fixed to the top wall of the sampling box, and a telescopic assembly for expanding the sampling range is provided on the support member. The telescopic assembly includes a front telescopic rod, a middle telescopic rod and a rear telescopic rod. The horizontal section of the support member rotates from front to back in sequence and is connected to the front telescopic rod, the middle telescopic rod and the rear telescopic rod corresponding to the three absorption bottles.

[0010] In the above-mentioned portable sampling device for detecting air particulate matter, the fixed ends of the front telescopic rod, the middle telescopic rod and the rear telescopic rod are all rotatably connected to the horizontal section of the support member, and the side walls where the fixed ends of the front telescopic rod and the middle telescopic rod are close to each other, and the side walls where the fixed ends of the middle telescopic rod and the rear telescopic rod are close to each other are all rotatably connected to a rotating seat, and a telescopic connecting rod is hinged between the two rotating seats facing each other.

[0011] In the above-mentioned portable sampling device for detecting air particulate matter, the flow rate adjustment mechanism includes an arc-shaped supporting member, and the fixed ends of the front telescopic rod, the middle telescopic rod and the rear telescopic rod are all fixedly connected to the arc-shaped supporting member, and adjustment tracks are symmetrically opened on the front and rear telescopic supporting member, and the adjustment track consists of two horizontal sections at the front and rear and an inclined section connected between the horizontal sections. A pulley with a frosted surface is slidably connected to the front and rear adjustment tracks.

[0012] In the above-mentioned portable sampling device for detecting air particulate matter, the locking mechanism includes a front snap-fit ​​plate, to which the side wall of the front telescopic rod is fixedly connected, and a corresponding F-shaped front locking piece is snap-fitted on the front snap-fit ​​plate, and the rear side wall of the rear telescopic rod is fixedly connected to a rear snap-fit ​​plate, and a corresponding F-shaped rear locking piece is snap-fitted on the rear snap-fit ​​plate.

[0013] In the above-mentioned portable sampling device for detecting air particulate matter, the front locking member and the rear locking member are fixedly connected to the side of the sampling box close to a pin 1 that is plugged into the vertical side wall of the support member, the front locking member and the rear locking member are fixedly connected to a pin 2 that is located below the pin 1 and is plugged into the corresponding external support frame, and the bottom walls of the vertical sections of the front locking member and the rear locking member are fixedly connected to an arc-shaped slider.

[0014] In the above-mentioned portable sampling device for detecting air particulate matter, the rotating part includes a square block, the bottom wall of the sampling box is provided with a square groove adapted to the square block, and the square groove and the sampling box are snap-connected, a support platform is provided under the square block, the support platform is fixedly composed of a disc member and a round rod member distributed up and down, and the top wall of the disc member is installed with a motor whose output end top wall is fixedly connected to the bottom wall of the square block.

[0015] In the above-mentioned portable sampling device for detecting air particulate matter, the support component includes an upper support assembly for providing annular sliding support for the locking mechanism, a lower support assembly for providing support for the support platform and the sampling mechanism, and a double-headed electric push rod for driving the upper support assembly and the lower support assembly from a folded state to an unfolded state.

[0016] In the above-mentioned portable sampling device for detecting air particulate matter, the upper support assembly includes an upper support plate, the bottom wall of the disc member is hinged with multiple upper support plates along the circumferential direction, and the top wall of the upper support plate is provided with an arc-shaped slide rail adapted to the arc-shaped slider, the upper part of the side wall of the round rod member is connected to the upper sliding ring for sliding up and down, and the side wall of the upper sliding ring is evenly hinged with multiple connecting rods corresponding to the upper support plate along the circumferential direction, and the end of the connecting rod away from the upper sliding ring is hinged to the corresponding bottom wall of the upper support plate.

[0017] In the above-mentioned portable sampling device for detecting air particulate matter, the lower support assembly includes a lower support rod, a plurality of lower support rods are hingedly connected to the middle part of the side wall of the round rod along the circumferential direction, and the lower part of the side wall of the round rod is slidably connected to a lower sliding ring, the side wall of the lower sliding ring is evenly hinged with a plurality of connecting rods 2 that are compatible with the lower support rod along the circumferential direction, and the end of the connecting rod 2 away from the lower sliding ring is hinged with a sliding seat, and the sliding seat is slidably sleeved on the outer wall of the corresponding lower support rod.

[0018] In the above-mentioned portable sampling device for detecting air particulate matter, a plurality of double-headed electric push rods are installed in the middle of the side wall of the round rod through a mounting seat, and the upper side wall of the upper output end of the double-headed electric push rod is connected to the lower side wall of the upper sliding ring, and the lower side wall of the lower output end of the double-headed electric push rod is connected to the upper side wall of the lower sliding ring.

[0019] Compared with the existing technology, the advantages of the present invention are:

[0020] 1. Through the coordination of the sampling mechanism, range adjustment mechanism and locking mechanism, air in different ranges can enter the corresponding flexible pipes, absorption bottles and drying bottles, thereby expanding the sampling range and improving the representativeness and accuracy of the test data; the front telescopic rod, middle telescopic rod and rear telescopic rod are finally distributed in a fan shape and support the pipe connected to the air inlet of the absorption bottle, and the locking mechanism locks the position of the range adjustment mechanism.

[0021] 2. Through the cooperation of the range adjustment mechanism and the flow rate adjustment mechanism, when the pulley squeezes the flexible pipe, the flow rate of air through the flexible pipe slows down, which can make the air fully contact with the adsorbent in the absorption bottle and the drying bottle, and prevent the penetration effect caused by excessive flow rate, resulting in insufficient sampling; the front telescopic rod, the middle telescopic rod and the rear telescopic rod provide support for the flow rate adjustment mechanism, and the pulley gradually fits against the outer wall of the flexible pipe and squeezes the outer wall of the flexible pipe.

[0022] 3. Multi-directional sampling is carried out through the coordination of the sampling mechanism, locking mechanism and supporting mechanism. Taking into account the wind direction and the location of the emission source, sampling from multiple directions can help to more accurately locate the pollution source and assess its impact range; the output end of the motor drives the square block and the sampling box to rotate, which can quickly complete two sets of sampling in different directions, improve the sampling efficiency, and conduct comparative experiments with the two sets of samples to improve the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0024] Figure 1 A schematic diagram of the overall structure.

[0025] Figure 2 This is a partial structural diagram of the sampling mechanism.

[0026] Figure 3 It is a partial structural diagram of the sampling mechanism, range adjustment mechanism and locking mechanism.

[0027] Figure 4 This is a structural diagram of the range adjustment mechanism after the shape changes.

[0028] Figure 5 This is a structural diagram of the range adjustment mechanism before the shape changes.

[0029] Figure 6 Schematic diagram of the locking mechanism.

[0030] Figure 7 for Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0031] Figure 8 It is a structural diagram after the support mechanism changes in shape.

[0032] Figure 9 This is a structural diagram of the support mechanism before the shape changes.

[0033] In the figure: 1. Sampling mechanism; 11. Sampling box; 12. Handle; 13. External support frame; 14. Absorption bottle; 15. Drying bottle; 2. Range adjustment mechanism; 21. Support member; 22. Telescopic assembly; 221. Front telescopic rod; 222. Middle telescopic rod; 223. Rear telescopic rod; 23. Telescopic connecting rod; 3. Flow rate adjustment mechanism; 31. Arc support member; 32. Adjustment track; 33. Pulley; 4. Locking mechanism; 41. Front clamping plate; 42. Rear Clamping plate; 43. Front locking piece; 44. Rear locking piece; 45. Latch 1; 46. Latch 2; 5. Support mechanism; 51. Support platform; 52. Motor; 53. Square block; 54. Upper support assembly; 541. Upper sliding ring; 542. Connecting rod 1; 543. Upper support plate; 544. Arc-shaped slide rail; 55. Double-headed electric push rod; 56. Lower support assembly; 561. Lower support rod; 562. Slide seat; 563. Connecting rod 2; 564. Lower sliding ring. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Reference Figures 1 to 2 A portable sampling device for detecting air particulate matter includes a sampling mechanism 1 and a range adjustment mechanism 2. The sampling mechanism 1 includes a sampling box 11. A handle 12 facing forward and backward is fixedly connected to the middle of the top wall of the sampling box 11. Three absorption bottles 14 evenly distributed front and back are detachably installed on the left and right sides of the top wall of the sampling box 11. The side walls of the sampling box 11 are symmetrically hinged with an external support frame 13. Three drying bottles 15 corresponding to the absorption bottles 14 are detachably installed on the external support frame 13.

[0036] Reference Figures 1 to 2 The sampling box 11 is provided with a range adjustment mechanism 2, and the range adjustment mechanism 2 is provided with a flow rate adjustment mechanism 3 for adjusting the air flow rate during sampling. The sampling box 11 and the range adjustment mechanism 2 are jointly provided with a locking mechanism 4 for enhancing the connection stability, and the sampling box 11 and the locking mechanism 4 are jointly provided with a supporting mechanism 5.

[0037] The top walls of the absorption bottle 14 and the drying bottle 15 are both provided with an air inlet and an air outlet, the rear side wall of the sampling box 11 is provided with an air inlet, and flexible pipes are connected between the air inlet of the absorption bottle 14, the air outlet of the absorption bottle 14 and the air inlet of the drying bottle 15, and between the air outlet of the drying bottle 15 and the air inlet of the sampling box 11.

[0038] Before sampling, adjust the range adjustment mechanism 2, then install the absorption bottle 14 on the sampling box 11, flip the external support frame 13 from a vertical state to a horizontal state, and then install the drying bottle 15 on the external support frame 13. Flexible pipes are installed at the corresponding air inlets and outlets between the absorption bottle 14, the drying bottle 15 and the sampling box 11. The absorption bottle 14 is filled with absorption liquid, and the air is extracted and passes through the liquid. Part of the target pollutants is dissolved in the liquid, and then the liquid is analyzed. The drying bottle 15 is filled with activated carbon, silica gel, etc. to dehumidify the air. The air enters the absorption bottle 14 through the pipe, and enters the drying bottle 15 from the air outlet of the absorption bottle 14 through the pipe, and finally enters the sampling box 11 through the air outlet and the pipe of the drying bottle 15 for adsorption sampling to detect micron-level air particles.

[0039] The pipeline connected to the air inlet of the absorption bottle 14 is supported by the range adjustment mechanism 2. The air inlet position of the pipeline is changed by adjusting the range adjustment mechanism 2, thereby adjusting the sampling range. The flow rate of the air in the pipeline is adjusted by the flow rate adjustment mechanism 3. The position of the range adjustment mechanism 2 is locked by the locking mechanism 4. The sampling mechanism 1 and the locking mechanism 4 are installed on the supporting mechanism 5. The locking mechanism 4 and the supporting mechanism 5 cooperate to drive the sampling mechanism 1 and the range adjustment mechanism 2 to change direction, so as to facilitate multi-directional sampling.

[0040] Reference Figures 3 to 5 The range adjustment mechanism 2 includes a support member 21 that is symmetrically fixed to the top wall of the sampling box 11. A telescopic assembly 22 for expanding the sampling range is provided on the support member 21. The telescopic assembly 22 includes a front telescopic rod 221, a middle telescopic rod 222 and a rear telescopic rod 223. The horizontal section of the support member 21 is rotated from front to back and is connected to the front telescopic rod 221, the middle telescopic rod 222 and the rear telescopic rod 223 corresponding to the three absorption bottles 14; the fixed ends of the front telescopic rod 221, the middle telescopic rod 222 and the rear telescopic rod 223 are all rotatably connected to the horizontal section of the support member 21, and the side walls where the fixed ends of the front telescopic rod 221 and the middle telescopic rod 222 are close to each other, and the side walls where the fixed ends of the middle telescopic rod 222 and the rear telescopic rod 223 are close to each other are rotatably connected to a rotating seat, and a telescopic connecting rod 23 is hinged between the two rotating seats facing each other.

[0041] The initial state of the front telescopic rod 221, the middle telescopic rod 222 and the rear telescopic rod 223 is horizontal and retracted above the sampling box 11. Before sampling, the front telescopic rod 221 is rotated one hundred and eighty degrees, the rear telescopic rod 223 is rotated ninety degrees, and the middle telescopic rod 222 adaptively rotates with the rotation of the front telescopic rod 221 and the rear telescopic rod 223. The rotating seats on the front telescopic rod 221, the middle telescopic rod 222 and the rear telescopic rod 223 adaptively rotate, and the telescopic connecting rod 23 connected between the rotating seats is adaptively stretched. The telescopic ends of the front telescopic rod 221, the middle telescopic rod 222 and the rear telescopic rod 223 are extended, and the front telescopic rod 221, the middle telescopic rod 222 and the rear telescopic rod 223 are finally distributed in a fan shape, and support the pipe connected to the air inlet of the absorption bottle 14, so that air enters the corresponding flexible pipe and the absorption bottle 14 and the drying bottle 15 from different positions, expanding the sampling range and improving the representativeness and accuracy of the data.

[0042] Reference Figure 4 and Figure 7 The flow rate adjustment mechanism 3 includes an arc-shaped supporting member 31. The fixed ends of the front telescopic rod 221, the middle telescopic rod 222 and the rear telescopic rod 223 are all fixedly connected with the arc-shaped supporting member 31. The arc-shaped supporting member 31 is symmetrically provided with adjustment rails 32 in the front and rear directions. The adjustment rails 32 are composed of two horizontal sections at the front and rear and an inclined section connecting the horizontal sections. A pulley 33 with a frosted surface is slidably connected to the front and rear adjustment rails 32.

[0043] When the flexible pipe is installed on the front telescopic rod 221, the middle telescopic rod 222 and the rear telescopic rod 223, the pipe passes through the arc-shaped support member 31 and the pulley 33, and the pulley 33 is moved by the finger to slide on the adjustment track 32. When the pulley 33 gradually moves along the adjustment track 32 toward the sampling box 11, the pulley 33 gradually adheres to the outer wall of the flexible pipe and squeezes the outer wall of the flexible pipe. The outer wall of the pulley 33 is frosted to increase the friction with the outer wall of the flexible pipe. When the pulley 33 squeezes the flexible pipe, the flow rate of air through the flexible pipe slows down, which can make the air fully contact with the adsorbent in the absorption bottle 14 and the drying bottle 15, preventing the flow rate from being too fast and causing a penetration effect, resulting in insufficient sampling.

[0044] Reference Figures 3 to 6The locking mechanism 4 includes a front locking plate 41, to which the side wall of the front telescopic rod 221 is fixedly connected, and a corresponding F-shaped front locking piece 43 is snap-connected on the front locking plate 41, and a rear side wall of the rear telescopic rod 223 is fixedly connected with a rear locking plate 42, and a corresponding F-shaped rear locking piece 44 is snap-connected on the rear locking plate 42; the front locking piece 43 and the rear locking piece 44 are fixedly connected to a latch 1 45 on the side close to the sampling box 11, and the front locking piece 43 and the rear locking piece 44 are fixedly connected to a latch 2 46 located below the latch 1 45 and plugged into the corresponding external support frame 13, and the vertical bottom walls of the front locking piece 43 and the rear locking piece 44 are fixedly connected with an arc-shaped slider.

[0045] After the range adjustment mechanism 2 and the flow rate adjustment mechanism 3 are adjusted, the front locking member 43 and the rear locking member 44 are moved closer to the front clamping plate 41 and the rear clamping plate 42 from the corresponding left and right sides of the sampling box 11, and are engaged with the corresponding front clamping plate 41 and the rear clamping plate 42. At the same time, the latch 1 45 and the latch 2 46 on the front locking member 43 and the rear locking member 44 are inserted into the corresponding support member 21 and the external support frame 13 to achieve the position locking between the front telescopic rod 221 and the rear telescopic rod 223 and the sampling box 11, as well as the locking of the position of the external support frame 13, thereby enhancing the stability of the sampling mechanism 1 and the range adjustment mechanism 2 during sampling. It should be noted that the telescopic link 23 can adopt a spring telescopic structure to provide a certain support to the telescopic rod 222 through the elastic force of the spring.

[0046] Reference Figure 1 and Figure 8 The supporting mechanism 5 includes a rotating component that is connected to the sampling box 11 for changing direction sampling and a foldable and deformable supporting component. The rotating component includes a square block 53. The bottom wall of the sampling box 11 is provided with a square groove that is compatible with the square block 53. The square groove and the square block 53 are connected by snapping. A support platform 51 is provided under the square block 53. The support platform 51 is fixedly composed of upper and lower distributed disc parts and round rod parts. The top wall of the disc part is installed with a motor 52 whose top wall of the output end is fixedly connected to the bottom wall of the square block 53.

[0047] Reference Figure 1 and Figure 8 The supporting components include an upper supporting assembly 54 for providing annular sliding support for the locking mechanism 4, a lower supporting assembly 56 for providing support for the support platform 51 and the sampling mechanism 1, and a double-headed electric push rod 55 for driving the upper supporting assembly 54 and the lower supporting assembly 56 from a folded state to an unfolded state.

[0048] Reference Figures 8 and 9The upper support assembly 54 includes an upper support plate 543, and the bottom wall of the disc member is hinged with multiple upper support plates 543 along the circumferential direction. The top wall of the upper support plate 543 is provided with an arc-shaped slide rail 544 adapted to the arc-shaped slider. The upper part of the side wall of the round rod member is connected to the upper sliding ring 541 for sliding up and down. The side wall of the upper sliding ring 541 is evenly hinged with multiple connecting rods 542 corresponding to the upper support plate 543 along the circumferential direction. The end of the connecting rod 542 away from the upper sliding ring 541 is hinged to the corresponding bottom wall of the upper support plate 543.

[0049] Reference Figures 8 and 9 The lower support assembly 56 includes a lower support rod 561, and a plurality of lower support rods 561 are hingedly connected to the middle part of the side wall of the round rod along the circumferential direction. The lower part of the side wall of the round rod is slidably connected to the lower sliding ring 564. The side wall of the lower sliding ring 564 is evenly hinged with a plurality of connecting rods 563 adapted to the lower support rod 561 along the circumferential direction. The end of the connecting rod 563 away from the lower sliding ring 564 is hinged with a sliding seat 562, and the sliding seat 562 is slidably sleeved on the outer wall of the corresponding lower support rod 561; a plurality of double-headed electric push rods 55 staggered with the lower support rod 561 are installed on the middle part of the side wall of the round rod through a mounting seat, and the upper side wall of the upper output end of the double-headed electric push rod 55 is connected to the lower side wall of the upper sliding ring 541, and the lower side wall of the lower output end of the double-headed electric push rod 55 is connected to the upper side wall of the lower sliding ring 564.

[0050] Adjust the support mechanism 5 to a suitable state, then connect the sampling mechanism 1 and the locking mechanism 4 to the support mechanism 5, and drive the sampling mechanism 1 to perform multi-directional sampling through the support mechanism 5. The specific steps are as follows: the initial state of the multiple upper support plates 543 and the multiple lower support rods 561 is that they are circumferentially distributed and inclined close to the cylindrical member, and the initial state of the double-headed electric push rod 55 is that both the upper and lower telescopic ends are in a retracted state (such as Figure 9 As shown), the upper and lower telescopic ends of the double-headed electric push rod 55 are synchronously moved upward and downward respectively, and the upper telescopic end pushes the upper sliding ring 541 to slide upward on the side wall of the cylindrical member, while the lower telescopic end pushes the lower sliding ring 564 to slide downward on the side wall of the cylindrical member.

[0051] When the upper sliding ring 541 slides upward, the end of the connecting rod 542 hinged to the upper sliding ring 541 and the upper support plate 543 rotates adaptively, and the connecting rod 542 tilts and adapts. The connecting rod 542 pushes the upper support plate 543 from a state close to the side wall of the cylindrical member to a horizontal state. The upper support plate 543 supports the sampling mechanism 1 and the locking mechanism 4.

[0052] When the lower sliding ring 564 slides downward, the end of the connecting rod 2 563 hinged to the slide 562 and the lower sliding ring 564 rotates adaptively, and the connecting rod 2 563 changes from an initial state of being tilted close to the cylindrical member to a horizontal state. The connecting rod 2 563 pushes the slide 562, and the slide 562 slides adaptively on the outer wall of the lower support rod 561, and pushes the lower support rod 561 from a state of being tilted close to the cylindrical member to a state of being tilted away from the cylindrical member. The lower support rod 561 supports the support platform 51 from multiple directions, which makes it convenient to place the equipment at the sampling location.

[0053] Lift the handle 12 and place the sampling box 11 on the square block 53. The square groove on the bottom wall of the sampling box 11 engages with the square block 53, and multiple front locking parts 43 and rear locking parts 44 move to the upper support plate 543. Multiple upper support plates 543 and arc-shaped slide rails 544 jointly provide sliding support for the arc-shaped sliders on the bottom walls of the front locking parts 43 and the rear locking parts 44. The output end of the motor 52 drives the square block 53 and the sampling box 11 to rotate, and the sampling box 11 drives the range adjustment mechanism 2, the flow rate adjustment mechanism 3 and the locking mechanism 4 to rotate, and multi-directional sampling can be performed. Considering the wind direction and the location of the emission source, sampling from multiple directions can more accurately locate the pollution source and evaluate its impact range.

[0054] The specific steps are as follows: the absorption bottle 14 and the drying bottle 15 on the left are one group, and the absorption bottle 14 and the drying bottle 15 on the right are another group. First, one group of samples is taken in one direction, and then the motor 52 is driven to rotate to the other direction to take another group of samples. The two groups of samples are quickly completed in different directions to improve the sampling efficiency. The two groups of samples are compared in an experiment to improve the accuracy of the test results.

[0055] The external support frame 13 that can be flipped, the front telescopic rod 221, the middle telescopic rod 222 and the rear telescopic rod 223 that can be rotated and telescoped, and the upper support plate 543 and the lower support rod 561 that can be folded and deformed improve the overall portability of the sampling equipment, save storage space, and facilitate transfer to different sampling locations for sampling.

[0056] The specific operating steps of this portable sampling device for detecting air particulate matter are as follows:

[0057] Before sampling, adjust the front telescopic rod 221, the middle telescopic rod 222 and the rear telescopic rod 223 to extend and distribute them in a fan shape, install the absorption bottle 14 on the sampling box 11, install the drying bottle 15 on the external support frame 13, and install flexible pipes at the corresponding air inlets and outlets between the absorption bottle 14, the drying bottle 15 and the sampling box 11. The telescopic component 22 supports the pipe connected to the air inlet of the absorption bottle 14 to expand the sampling range.

[0058] When the flexible pipe is squeezed by turning the pulley 33 by fingers, the flow rate of air through the flexible pipe slows down; the position of the range adjustment mechanism 2 is locked by the front locking member 43 and the rear locking member 44, and at the same time, the pin 1 45 and the pin 2 46 are inserted into the corresponding support member 21 and the external support frame 13 to lock the position.

[0059] The double-headed electric push rod 55 drives the upper support plate 543 and the lower support rod 561 to adjust. The lower support rod 561 supports the support platform 51 from multiple directions. The multiple upper support plates 543 and the arc-shaped slide rails 544 jointly provide sliding support for the arc-shaped sliders on the bottom walls of the front locking piece 43 and the rear locking piece 44, and are driven to rotate by the motor 52 for multi-directional sampling.

[0060] The air enters the absorption bottle 14, the drying bottle 15 and the sampling box 11 in sequence through the flexible pipe for sampling.

[0061] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A portable sampling device for detecting air particulate matter, comprising a sampling mechanism and a range adjustment mechanism, characterized in that: The sampling mechanism includes a sampling box, and a handle facing forward and backward is fixedly connected to the middle of the top wall of the sampling box. Three absorption bottles evenly distributed front and back are detachably installed on the left and right sides of the top wall of the sampling box, and an external support frame is symmetrically hinged to the side wall of the sampling box. Three drying bottles corresponding to the absorption bottles are detachably installed on the external support frame; The sampling box is provided with a range adjustment mechanism, and the range adjustment mechanism is provided with a flow rate adjustment mechanism for adjusting the air flow rate. The sampling box and the range adjustment mechanism are jointly provided with a locking mechanism for enhancing the connection stability. The sampling box and the locking mechanism are jointly provided with a support mechanism, and the support mechanism includes a rotating component that is connected to the sampling box for changing direction sampling and a foldable and deformable support component. The range adjustment mechanism includes a support member fixedly connected to the top wall of the sampling box symmetrically on both sides, and a telescopic assembly for expanding the sampling range is provided on the support member, the telescopic assembly includes a front telescopic rod, a middle telescopic rod and a rear telescopic rod, and the horizontal section of the support member is rotated from front to back in sequence to connect the front telescopic rod, the middle telescopic rod and the rear telescopic rod corresponding to the three absorption bottles; The locking mechanism includes a front snap plate, a front snap plate fixedly connected to the side wall of the front telescopic rod, and a corresponding F-shaped front locking piece snapped and connected to the front snap plate, and a rear snap plate fixedly connected to the rear side wall of the rear telescopic rod, and a corresponding F-shaped rear locking piece snapped and connected to the rear snap plate; The front locking piece and the rear locking piece are fixedly connected to the side of the sampling box close to a latch one which is plugged into the vertical side wall of the support piece. The front locking piece and the rear locking piece are fixedly connected to a latch two which is located below the latch one and is plugged into the corresponding external support frame. The bottom walls of the vertical sections of the front locking piece and the rear locking piece are fixedly connected to an arc-shaped slider.

2. A portable sampling device for detecting air particulate matter according to claim 1, characterized in that: The fixed ends of the front telescopic rod, the middle telescopic rod and the rear telescopic rod are all rotatably connected to the horizontal section of the support member, and the side walls where the fixed ends of the front telescopic rod and the middle telescopic rod are close to each other, and the side walls where the fixed ends of the middle telescopic rod and the rear telescopic rod are close to each other are rotatably connected to a rotating seat, and a telescopic connecting rod is hinged between the two rotating seats facing each other.

3. A portable sampling device for detecting air particulate matter according to claim 1, characterized in that: The flow rate adjustment mechanism includes an arc-shaped supporting member, and the fixed ends of the front telescopic rod, the middle telescopic rod and the rear telescopic rod are all fixedly connected to the arc-shaped supporting member. Adjustment rails are symmetrically provided on the arc-shaped supporting member, and the adjustment rails are composed of two horizontal sections at the front and rear and an inclined section connected between the horizontal sections. A pulley with a frosted surface is slidably connected to the front and rear adjustment rails.

4. The portable sampling device for detecting air particulate matter according to claim 1, characterized in that: The rotating component includes a square block, and the bottom wall of the sampling box is provided with a square groove adapted to the square block, and the square groove and the square block are snap-connected. A support platform is provided under the square block, and the support platform is fixedly composed of a disc member and a round rod member distributed up and down, and the top wall of the disc member is installed with a motor whose output end top wall is fixedly connected to the bottom wall of the square block.

5. The portable sampling device for detecting air particulate matter according to claim 1, characterized in that: The support component includes an upper support assembly for providing annular sliding support for the locking mechanism, a lower support assembly for providing support for the support platform and the sampling mechanism, and a double-headed electric push rod for driving the upper support assembly and the lower support assembly from a folded state to an unfolded state.

6. The portable sampling device for detecting air particulate matter according to claim 5, characterized in that: The upper support assembly includes an upper support plate, a plurality of upper support plates are hingedly connected to the bottom wall of the disc member along the circumferential direction, and an arc-shaped slide rail adapted to the arc-shaped slider is provided on the top wall of the upper support plate, an upper sliding ring is connected to the upper side wall of the round rod member for sliding up and down, and a plurality of connecting rods 1 corresponding to the upper support plate are evenly hingedly connected to the side wall of the upper sliding ring along the circumferential direction, and an end of the connecting rod 1 away from the upper sliding ring is hinged to the corresponding bottom wall of the upper support plate.

7. The portable sampling device for detecting air particulate matter according to claim 6, characterized in that: The lower support assembly includes a lower support rod, a plurality of lower support rods are hingedly connected to the middle part of the side wall of the round rod along the circumferential direction, and the lower part of the side wall of the round rod is connected to a lower sliding ring for sliding up and down movement, and a plurality of connecting rods 2 that are compatible with the lower support rod are evenly hingedly connected to the side wall of the lower sliding ring along the circumferential direction, and a sliding seat is hingedly connected to the end of the connecting rod 2 away from the lower sliding ring, and the sliding seat is slidably sleeved on the outer wall of the corresponding lower support rod.

8. The portable sampling device for detecting air particulate matter according to claim 7, characterized in that: A plurality of double-headed electric push rods are installed in the middle part of the side wall of the round rod through a mounting seat, and the upper side wall of the upper output end of the double-headed electric push rod is connected to the lower side wall of the upper sliding ring, and the lower side wall of the lower output end of the double-headed electric push rod is connected to the upper side wall of the lower sliding ring.

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