Sampling device suitable for percolate

Abstract

The invention relates to the technical field of leachate sampling tools, in particular to a leachate sampling device which comprises a miniature air pump, a measuring cylinder and a clutch mechanism, scale marks are arranged on the measuring cylinder, and the clutch mechanism is slidably mounted on the measuring cylinder and used for controlling the clutch mechanism to be clamped with or separated from the measuring cylinder; the supporting mechanism is connected to the periphery of the measuring cylinder in a sleeving mode and connected with the micro air pump and the clutch mechanism, the supporting mechanism is inflated through the micro air pump to increase the buoyancy of the supporting mechanism and drives the clutch mechanism to synchronously float on the surface of the percolate, and when a worker samples the percolate, due to buoyancy supporting of the clutch mechanism and the supporting mechanism and the percolate, the percolate can be accurately measured; the auxiliary measuring cylinder is perpendicular to the surface of the percolate, so that a worker can control the measuring cylinder to be perpendicular to the percolate by a single hand with small force, the percolate can be sampled by rotating the annular plate, the operation is simple, and the depth control reliability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of leachate sampling tools, and specifically to a leachate sampling device suitable for use. Background Art

[0002] With the sharp increase in the amount of urban domestic waste treated, the environmental harm of landfill leachate has become increasingly prominent. As a core link in pollution assessment, stratified sampling of leachate requires accurate acquisition of representative samples at different depths. However, existing sampling devices have significant technical bottlenecks in aspects such as stratification accuracy, anti-pollution mechanisms, and reliability of depth control, severely restricting the scientific nature of detection data and the effectiveness of treatment decisions, which are specifically manifested in the following aspects: 1. Insufficient stratification sampling accuracy and sample mixing defects: Currently, the mainstream sampling devices adopt a combined structure of a fixed sampling rod and a bottom container. When the operator inserts the sampling rod into the leachate pool and the container moves up and down in the leachate, different layers of liquid will mix at the container opening. Experimental studies have shown that approximately 5 - 10% of the components in the actual samples collected by traditional samplers are mixed liquids from the passing layers. This phenomenon will lead to serious distortion of detection data in an environment with significant pollution stratification (such as floating grease on the surface layer, suspended particulate matter in the middle layer, and high-concentration heavy metals in the bottom layer).

[0003] 2. Cross-contamination of samples: To improve sampling efficiency, technicians in the field have proposed a technical means of continuous sampling through a single container, but this means has an irreversible pollution risk. The inner wall of the tubular container is prone to adhering colloidal pollutants, and the residue rate increases exponentially with the number of uses.

[0004] 3. Poor reliability of depth control: In order to position the sampling port of the container at a specified depth, when sampling leachate, the tool needs to be as perpendicular to the liquid surface as possible. This results in the staff having to overcome the weight influence of the tool itself and the instability caused by the buoyancy of the liquid during the sampling process, holding the sampling tool with one hand to keep it in a fixed position, and using the other hand to draw negative pressure for sampling. During this period, the depth of the tool cannot be changed, and the operation experience of the staff has a great impact on the accuracy of the sample.

[0005] Therefore, we propose a leachate sampling device suitable for use. Summary of the Invention

[0006] To solve the above technical problems, the present invention provides a leachate sampling device suitable for use, including a micro air pump and a measuring cylinder, with scale lines provided on the measuring cylinder, and further including: A clutch mechanism, which is slidably installed on the measuring cylinder and is used to control its engagement or separation from the measuring cylinder; A support mechanism, which is sleeved around the periphery of the measuring cylinder and connected to the micro air pump and the clutch mechanism. The support mechanism is inflated by the micro air pump to increase its own buoyancy, driving the clutch mechanism to float synchronously on the surface of the leachate, and assisting the measuring cylinder to be perpendicular to the surface of the leachate through the clutch mechanism; Sampling cylinders, there are several of the sampling cylinders, the cross-section is an incomplete ring shape, and they are arrayed at the lower position inside the measuring cylinder; A linkage mechanism, which is installed at the top of the measuring cylinder and connected to the clutch mechanism; A sampling mechanism, which is installed inside the measuring cylinder and connected to the micro air pump and the linkage mechanism. According to different rotation angles of the clutch mechanism, the linkage mechanism synchronously drives the sampling mechanism to put the sampling cylinder at the corresponding position in communication with the leachate and sample the leachate by the negative pressure generated by the micro air pump, or all the sampling cylinders are in a sealed state.

[0007] In some embodiments, the clutch mechanism includes an annular block slidably installed on the measuring cylinder. The outer wall of the annular block is arrayed with support rods, and fixed balls are installed at the top ends of the support rods. One end of the fixed ball away from the support rod is a plane and is subjected to frosted treatment. A rotating ring is sleeved at the bottom of the annular block, and sector-shaped blocks are arrayed on the rotating ring. The adjacent sector-shaped blocks are connected by docking rods. Incomplete annular grooves are formed on the inner walls of the sector-shaped blocks and are slidably matched with the fixed balls. Clamping rods are sleeved on the docking rods, and the joints between the clamping rods and the docking rods are connected by torsion springs. The top ends of the clamping rods are inclined surfaces, and rubber blocks are installed on the inclined surfaces. An arched groove is formed on the side of the clamping rod close to the axis of the measuring cylinder. The two sides of the arched groove are far from the axis of the measuring cylinder, and the middle part is close to the axis of the measuring cylinder and is a plane and is subjected to frosted treatment.

[0008] In some embodiments, the support mechanism includes square grooves formed at the bottoms of the outer walls of half of the sector-shaped blocks. The sector-shaped blocks with square grooves and the sector-shaped blocks without square grooves are arranged alternately. Sector-shaped air bags are installed in the square grooves through rotating shafts. The sector-shaped air bags are interconnected by a first hose, and one of the sector-shaped air bags is connected to the air outlet of the micro air pump through a second hose.

[0009] In some embodiments, the linkage mechanism includes an annular plate rotatably mounted at the top end of the measuring cylinder. A plurality of multi-stage telescopic rods are arrayed on the bottom surface of the annular plate. One end of each multi-stage telescopic rod away from the annular plate is fixedly connected to the top surface of one of the sector blocks. The inner diameter bottom of the annular plate is fixedly provided with a pressing block. The pressing block is in an incomplete ring shape coaxial with the measuring cylinder, and the surface away from the top end of the measuring cylinder is an inclined surface. The linkage mechanism further includes a fixed ring arranged inside the measuring cylinder. There are two fixed rings. A trigger rod is slidably arranged on the fixed rings. The trigger rod penetrates through the two fixed rings, and the number is the same as that of the sampling cylinders. One end of the trigger rod close to the top of the measuring cylinder is provided with an arc-shaped block. The arc-shaped block is coaxial with the pressing block and is located on the path of rotation of the pressing block. A fixing plate is mounted on the trigger rod. The fixing plate is located between the two fixed rings and is in contact with the bottom surface of the upper fixed ring. Springs are sleeved on the trigger rods. One end of each spring is in contact with the fixing plate, and the other end is in contact with the top surface of the lower fixed ring.

[0010] In some embodiments, the sampling mechanism includes a first piston and a second piston sleeved on the trigger rod. The numbers of the first piston and the second piston are both equal to that of the sampling cylinders. The second piston is located at one end of the sampling cylinder close to the bottom of the measuring cylinder. The surface away from the axis of the measuring cylinder and the surface close to the first piston are provided with second through holes communicating with each other to block the corresponding end of the sampling cylinder. The first piston is located at the other end of the corresponding sampling cylinder. The surface close to the axis of the measuring cylinder and the surface close to the second piston are provided with first through holes communicating with each other. The measuring cylinder is coaxially penetrated and installed with an air guide pipe. The lower part of the air guide pipe is fixed to the surface of the sampling cylinder close to its own axis. Third through holes are provided between the air guide pipe and each sampling cylinder. The third through holes are arranged in a staggered manner with the first through holes. One end of the air guide pipe close to the top of the measuring cylinder is connected to the air inlet of a micro air pump. The micro air pump is wrapped with a handheld sleeve, and the handheld sleeve wraps the periphery of the air guide pipe close to the micro air pump.

[0011] In some embodiments, a flow guiding head is installed at one end of the air guide pipe close to the bottom of the measuring cylinder. The flow guiding head is in a mushroom shape.

[0012] In some embodiments, when all the sampling cylinders are sealed by the second pistons, the elastic force of the spring on a single trigger rod is equal to the sum of the frictional forces between the first piston and the second piston and the inner wall of the corresponding sampling cylinder.

[0013] In some embodiments, the frictional force between adjacent joint rods in the multi-stage telescopic rod increases step by step from the top end of the measuring cylinder to the top surface of the sector block, and the length of a single joint rod is 10 - 20 cm.

[0014] The present invention has at least the following beneficial effects: 1. When the staff takes samples of leachate, due to the buoyancy support of the clutch mechanism and the support mechanism on the leachate, and the auxiliary measuring cylinder being perpendicular to the surface of the leachate, the staff only needs to use a small force to control the measuring cylinder perpendicular to the leachate with one hand, and can complete the sampling of the leachate by rotating the annular plate. The operation is simple and the depth control reliability is high; 2. When the staff takes samples of leachate at different depths, the leachate at each level enters different sampling tubes respectively, and there is no cross-mixing of the leachate throughout the process, avoiding inaccurate detection results caused by sample mixing; 3. The diversion head at the top of the air guide tube can effectively prevent the mixing of liquids at different levels at the sampling port of the sampling cylinder, and the detection accuracy of the sample is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the clutch mechanism and the support mechanism of the present invention; Figure 3 is of the present invention Figure 2 schematic diagram of the structure at A; Figure 4 is a schematic diagram of the disassembled structure of the clutch mechanism and the support mechanism of the present invention; Figure 5 is a schematic diagram of the partial cross-sectional structure of the present invention; Figure 6 is of the present invention Figure 5 schematic diagram of the structure at B; Figure 7 is a schematic diagram of the internal cross-sectional structure of the present invention; Figure 8 is of the present invention Figure 7 schematic diagram of the structure at C; Figure 9 is of the present invention Figure 7 schematic diagram of the structure at D.

[0016] In the figure: 1, micro air pump; 2, measuring cylinder; 3, clutch mechanism; 31, annular block; 32, support rod; 33, fixed ball; 34, rotating ring; 35, sector block; 36, docking rod; 37, clamping rod; 38, rubber block; 39, arched groove; 4, support mechanism; 41, square groove; 42, sector airbag; 43, first hose; 44, second hose; 5, sampling cylinder; 6, linkage mechanism; 61, annular plate; 62, multi-stage telescopic rod; 63, extrusion block; 64, fixed ring; 65, trigger rod; 66, arc block; 67, fixing plate; 68, spring; 7, sampling mechanism; 71, first piston; 72, first through hole; 73, second piston; 74, second through hole; 75, air guide tube; 76, third through hole; 77, hand-held sleeve; 78, diversion head. DETAILED DESCRIPTION OF THE INVENTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] Embodiment 1:

[0019] Please refer to Figures 1-9 , the present invention provides a technical solution: a leachate sampling device, including a micro air pump 1 and a measuring cylinder 2, the measuring cylinder 2 is provided with scale lines, and further includes: a clutch mechanism 3, the clutch mechanism 3 is slidably installed on the measuring cylinder 2 and is used to control its own close fit or separation from the measuring cylinder 2; a support mechanism 4, the support mechanism 4 is sleeved around the measuring cylinder 2 and is connected to the micro air pump 1 and the clutch mechanism 3. The support mechanism 4 is inflated by the micro air pump 1 to increase its own buoyancy, driving the clutch mechanism 3 to float synchronously on the surface of the leachate, and assisting the measuring cylinder 2 to be perpendicular to the surface of the leachate through the clutch mechanism 3; sampling cylinders 5, there are several sampling cylinders 5, the cross-section is an incomplete ring, and they are arranged in an array at the lower position inside the measuring cylinder 2; a linkage mechanism 6, the linkage mechanism 6 is installed at the top of the measuring cylinder 2 and is connected to the clutch mechanism 3; a sampling mechanism 7, the sampling mechanism 7 is installed inside the measuring cylinder 2 and is connected to the micro air pump 1 and the linkage mechanism 6. According to different rotation angles of the clutch mechanism 3, the linkage mechanism 6 synchronously drives the sampling mechanism 7 to put the sampling cylinder 5 at the corresponding position in communication with the leachate and sample the leachate by the negative pressure generated by the micro air pump 1, or all the sampling cylinders 5 are in a closed state.

[0020] The clutch mechanism 3 includes an annular block 31 slidably mounted on the measuring cylinder 2. The outer wall of the annular block 31 is provided with a plurality of support rods 32 arranged in an array. The top ends of the support rods 32 are all provided with fixed balls 33. One end of the fixed ball 33 away from the support rod 32 is a flat surface and is subjected to frosting treatment. A rotating ring 34 is sleeved at the bottom of the annular block 31. A plurality of sector blocks 35 are arranged in an array on the rotating ring 34. Adjacent sector blocks 35 are connected by a docking rod 36. Incomplete annular grooves are formed in the inner walls of the sector blocks 35 and are in sliding fit with the fixed balls 33. Clamping rods 37 are sleeved on the docking rods 36. The joint between the clamping rod 37 and the docking rod 36 is connected by a torsion spring. The top end of the clamping rod 37 is an inclined surface, and a rubber block 38 is installed on the inclined surface. An arched groove 39 is formed on one side of the clamping rod 37 close to the axis of the measuring cylinder 2. The two sides of the arched groove 39 are far from the axis of the measuring cylinder 2, and the middle part is close to the axis of the measuring cylinder 2 and is a flat surface and is subjected to frosting treatment.

[0021] When the staff needs to clamp the measuring cylinder 2 through the clutch mechanism 3, any sector block 35 is rotated around the center of the measuring cylinder 2. The sector block 35 drives other sector blocks 35 and the clamping rods 37 to rotate synchronously around the axis of the measuring cylinder 2 through the docking rod 36. During this process, due to the restriction of the measuring cylinder 2 on the annular block 31, the annular block 31 can only move along the axis of the measuring cylinder 2 in the same trajectory. The staff holds the measuring cylinder 2 with one hand, and the fixed balls 33 at the top ends of the support rods 32 on the outer wall of the annular block 31 are also fixed. When the fixed balls 33 are in the annular grooves on the inner walls of the sector blocks 35, the sector blocks 35 and their connecting parts rotate smoothly. When the fixed balls 33 are located in the arched grooves 39 of the clamping rod 37 part, since the protruding part of the arched groove 39 faces the fixed balls 33, the fixed balls 33 will squeeze the clamping rod 37 through the arched grooves 39. It should be noted that the height of the arched groove 39 is greater than the diameter of the fixed ball 33 to ensure that the clamping rod 37 rotates smoothly around the docking rod 36. As the clamping rod 37 continues to rotate, when the flat part of the fixed ball 33 contacts the flat part in the middle of the arched groove 39, due to the fitting between the frosted surfaces, the friction force increases significantly, and the rubber block 38 at the top end of the clamping rod 37 clamps the measuring cylinder 2, completing the clamping and fixing of the measuring cylinder 2 by the clutch mechanism 3. When the staff needs to release the connection between the clutch mechanism 3 and the measuring cylinder 2, similarly, continue to rotate any sector block 35 to make the fixed ball 33 located in the annular groove in the sector block 35.

[0022] The support mechanism 4 includes square grooves 41 formed at the bottom of the outer walls of half of the number of sector blocks 35. The sector blocks 35 provided with the square grooves 41 and the sector blocks 35 not provided with the square grooves 41 are arranged alternately. Sector air bags 42 are installed in the square grooves 41 through rotating shafts. The sector air bags 42 are communicated with each other through a first hose 43, and one of the sector air bags 42 is communicated with the air outlet of the micro air pump 1 through a second hose 44.

[0023] Before sampling, the staff slide the fixed ring 64 to the first sampling depth, that is, the position of the shallowest depth, clamp the measuring cylinder 2 through the clutch mechanism 3, then turn on the micro air pump 1. The micro air pump 1 extracts the air from the outside, and the air is conveyed to the inside of the sector airbag 42 through the second hose 44. Under the connection of the first hose 43, the sector airbag 42 expands, completing the increase of the buoyancy of the support mechanism 4. Then the connection between the fixed ring 64 and the measuring cylinder 2 can be released, and sampling can begin.

[0024] The linkage mechanism 6 includes an annular plate 61 rotatably installed at the top end of the measuring cylinder 2. A plurality of multi-stage telescopic rods 62 are arrayed on the bottom surface of the annular plate 61. One end of each multi-stage telescopic rod 62 away from the annular plate 61 is fixedly connected to the top surface of one of the sector blocks 35. The inner diameter bottom of the annular plate 61 is fixedly provided with a pressing block 63. The pressing block 63 is an incomplete ring coaxial with the measuring cylinder 2, and the surface away from the top end of the measuring cylinder 2 is an inclined surface. The linkage mechanism 6 further includes a fixed ring 64 arranged inside the measuring cylinder 2. There are two fixed rings 64. A trigger rod 65 is slidably arranged on the fixed ring 64. The trigger rod 65 penetrates through the two fixed rings 64 and has the same number as the sampling cylinder 5. One end of the trigger rod 65 close to the top of the measuring cylinder 2 is provided with an arc-shaped block 66. The arc-shaped block 66 is coaxial with the pressing block 63 and is located on the rotation path of the pressing block 63. A fixing plate 67 is installed on the trigger rod 65. The fixing plate 67 is located between the two fixed rings 64 and is in contact with the bottom surface of the upper fixed ring 64. Springs 68 are sleeved on the trigger rods 65. One end of each spring 68 is in contact with the fixing plate 67, and the other end is in contact with the top surface of the lower fixed ring 64.

[0025] Since the annular plate 61 is directly connected to the sector block 35 through the multi-stage telescopic rod 62, when controlling the connection and separation between the clutch mechanism 3 and the measuring cylinder 2, the annular plate 34 can be directly rotated. During the rotation of the annular plate 61, the pressing block 63 is also driven to rotate around the axis of the measuring cylinder 2. During the rotation of the pressing block 63, its inclined surface synchronously presses the arc-shaped block 66 in contact with it, thereby driving the corresponding trigger rod 65 of the arc-shaped block 66 to press down. The fixing plate 67 on the trigger rod 65 presses the spring 68. When the pressing block 63 is separated from the arc-shaped block 66, under the action of the spring 68, the trigger rod 65 and the arc-shaped block 66 are reset.

[0026] The sampling mechanism 7 includes a first piston 71 and a second piston 73 sleeved on the trigger rod 65. The numbers of the first piston 71 and the second piston 73 are both equal to that of the sampling cylinders 5. The second piston 73 is located at one end of the sampling cylinder 5 close to the bottom of the measuring cylinder 2, and the surface away from the axis of the measuring cylinder 2 and the surface close to the first piston 71 are provided with second through holes 74 communicating with each other to block the corresponding end of the sampling cylinder 5. The first piston 71 is located at the other end of the corresponding sampling cylinder 5, and the surface close to the axis of the measuring cylinder 2 and the surface close to the second piston 73 are provided with first through holes 72 communicating with each other. The measuring cylinder 2 is coaxially penetrated and installed with an air guide pipe 75. The lower part of the air guide pipe 75 is fixed to the surface of the sampling cylinder 5 close to its own axis, and third through holes 76 are provided between the air guide pipe 75 and each sampling cylinder 5. The third through holes 76 are arranged in a staggered manner with the first through holes 72. One end of the air guide pipe 75 close to the top of the measuring cylinder 2 is connected to the air inlet of the micro air pump 1. The periphery of the micro air pump 1 is wrapped with a hand-held sleeve 77, and the hand-held sleeve 77 wraps the periphery of one end of the air guide pipe 75 close to the micro air pump 1.

[0027] One end of the air guide pipe 75 close to the bottom of the measuring cylinder 2 is installed with a flow guide head 78, and the flow guide head 78 is in a mushroom shape.

[0028] When the sampler moves deeper into the leachate, the flow guide head 78 can effectively prevent the leachate at the current level from mixing deeper.

[0029] The working principle of this embodiment is as follows: Before sampling, the staff drives the fan-shaped airbag 42 to expand through the micro air pump 1. Then, the staff holds the hand-held sleeve 77 with one hand and inserts the measuring cylinder 2 into the leachate pond. After reaching the first depth, the staff rotates the annular plate 34 with the other hand to complete the connection between the clutch mechanism 3 and the measuring cylinder 2. In this state, the gravity of the sampler is completely offset by the buoyancy generated by the fan-shaped airbag 42. The expanded fan-shaped airbag 42 can also prevent the sampler from tipping directly in the leachate pond. The staff only needs to make the measuring cylinder 2 perpendicular to the leachate surface through the hand-held sleeve 77. When the annular plate 61 rotates, the trigger rod 65 moves downward to drive the first piston 71 and the second piston 73 to move towards the bottom of the measuring cylinder 2. At this time, the first through hole 72 on the first piston 71 overlaps with the third through hole 76 on the corresponding sampling cylinder 5, and the second through hole 74 on the surface of the second piston 73 away from the axis of the measuring cylinder 2 contacts the leachate. That is, the sampling cylinder 5 and the air guide cylinder are directly connected to the fan-shaped airbag 42 through the micro air pump 1. The micro air pump 1 is turned on to extract the air in the sampling cylinder 5 into the fan-shaped airbag 42. At the same time, a negative pressure is generated in the sampling cylinder 5 to sample the leachate. After sampling, the weight of the overall sampler increases, and the fan-shaped airbag 42 expands more, increasing the buoyancy to offset each other. After sampling at the first depth, then continue to rotate the annular plate 34. The extrusion block 63 separates from the contacted arc-shaped block 66, and the spring 68 drives the trigger rod 65 to reset to seal the sampled sampling cylinder 5. At the same time, the clutch mechanism 3 is disengaged from the measuring cylinder 2. At this time, the staff can continue to insert the measuring cylinder 2 downward to the second depth, and repeat the above operations to complete sampling at different depths.

[0030] Embodiment 2:

[0031] On the basis of Embodiment 1 of the present invention, the present solution is further optimized: When all the sampling cylinders 5 are sealed by the second piston 73, the elastic force of the spring 68 on the single trigger rod 65 is equal to the sum of the frictional forces between the first piston 71 and the second piston 73 and the inner wall of the corresponding sampling cylinder 5.

[0032] When the staff rotates the annular plate 34 to synchronously drive the trigger rod 65 to move downward to compress the spring 68, the elastic force of the spring 68 will be greater than the sum of the frictional forces between the first piston 71 and the second piston 73 and the inner wall of the corresponding sampling cylinder 5. When sampling at a single depth is completed, the deformation of the spring 68 drives the trigger rod 65 to just return to the initial position. That is to say, in this state, the staff is the most labor-saving when operating, that is, rotating the annular plate 34.

[0033] The frictional force between adjacent joint rods in the multi-stage telescopic rod 62 increases step by step from the top end of the measuring cylinder 2 to the top surface of the fan-shaped block 35, and the length of a single joint rod is 10 - 20 cm.

[0034] This can be achieved by adding resistance blocks at the joints of the joint rods. The resistance blocks of the joint rod part closer to the sector block 35 are larger or the number is more. The length of the joint rod is preferably a multiple of 10, which is more convenient for calculation. When sampling the deep part of the leachate, the depth can be directly judged by the number of shortened joint rods penetrating through the multi-stage telescopic rod 62. In the case of the same accuracy, the staff does not need to directly observe the scale line on the measuring cylinder 2, reducing the discomfort during work.

[0035] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0036] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leachate sampling device, comprising a micro air pump (1) and a measuring cylinder (2), wherein the measuring cylinder (2) is provided with scale lines, and is characterized in that: Further included are: a clutch mechanism (3), which is slidably mounted on the measuring cylinder (2) and is used to control its close fit or separation from the measuring cylinder (2); a support mechanism (4), which is sleeved around the periphery of the measuring cylinder (2) and is connected to the micro air pump (1) and the clutch mechanism (3). The support mechanism (4) is inflated by the micro air pump (1) to increase its buoyancy, driving the clutch mechanism (3) to float synchronously on the surface of the leachate, and assisting the measuring cylinder (2) to be perpendicular to the surface of the leachate through the clutch mechanism (3); sampling cylinders (5), there are several sampling cylinders (5), the cross-section is an incomplete ring, and they are arrayed at the lower position inside the measuring cylinder (2); a linkage mechanism (6), which is installed at the top of the measuring cylinder (2) and is connected to the clutch mechanism (3); a sampling mechanism (7), which is installed inside the measuring cylinder (2) and is connected to the micro air pump (1) and the linkage mechanism (6).

2. The leachate sampling device according to claim 1, wherein: The clutch mechanism (3) includes an annular block (31) slidably mounted on the measuring cylinder (2). The outer wall of the annular block (31) is arrayed with support rods (32). Fixed balls (33) are installed at the tops of the support rods (32). One end of the fixed ball (33) away from the support rod (32) is a plane and is subjected to frosted treatment. A rotating ring (34) is sleeved at the bottom of the annular block (31). Sector blocks (35) are arrayed on the rotating ring (34). Adjacent sector blocks (35) are connected by docking rods (36). Incomplete annular grooves are formed on the inner walls of the sector blocks (35) and are in sliding fit with the fixed balls (33). Clamping rods (37) are sleeved on the docking rods (36). The joint between the clamping rod (37) and the docking rod (36) is connected by a torsion spring. The top of the clamping rod (37) is an inclined surface, and a rubber block (38) is installed on this inclined surface. An arched groove (39) is formed on the side of the clamping rod (37) close to the axis of the measuring cylinder (2). The two sides of the arched groove (39) are far from the axis of the measuring cylinder (2), and the middle part is close to the axis of the measuring cylinder (2) and is a plane and is subjected to frosted treatment.

3. The leachate sampling device according to claim 2, wherein: The support mechanism (4) includes square grooves (41) formed at the bottoms of the outer walls of half of the sector blocks (35). The sector blocks (35) with square grooves (41) and the sector blocks (35) without square grooves (41) are arranged alternately. Sector air bags (42) are installed in the square grooves (41) through rotating shafts. The sector air bags (42) are communicated with each other through a first hose (43), and one of the sector air bags (42) is communicated with the air outlet of the micro air pump (1) through a second hose (44).

4. The leachate sampling device according to claim 3, characterized in that: The linkage mechanism (6) includes an annular plate (61) rotatably mounted at the top end of the measuring cylinder (2). A plurality of multi-stage telescopic rods (62) are arrayed on the bottom surface of the annular plate (61). One end of each multi-stage telescopic rod (62) away from the annular plate (61) is fixedly connected to the top surface of one of the sector blocks (35). A pressing block (63) is fixedly installed at the bottom of the inner diameter of the annular plate (61). The pressing block (63) is in an incomplete annular shape coaxial with the measuring cylinder (2), and the surface away from the top end of the measuring cylinder (2) is an inclined surface. The linkage mechanism (6) further includes a fixed ring (64) arranged inside the measuring cylinder (2). There are two fixed rings (64). A trigger rod (65) is slidably arranged on the fixed rings (64). The trigger rod (65) penetrates through the two fixed rings (64), and the number is the same as that of the sampling cylinders (5). One end of the trigger rod (65) close to the top of the measuring cylinder (2) is provided with an arc-shaped block (66). The arc-shaped block (66) is coaxial with the pressing block (63) and is located on the rotation path of the pressing block (63). A fixing plate (67) is installed on the trigger rod (65). The fixing plate (67) is located between the two fixed rings (64) and is in contact with the bottom surface of the upper fixed ring (64). Springs (68) are sleeved on the trigger rod (65). One end of each spring (68) is in contact with the fixing plate (67), and the other end is in contact with the top surface of the lower fixed ring (64).

5. The leachate sampling device according to claim 4, wherein: The sampling mechanism (7) includes a first piston (71) and a second piston (73) sleeved on the trigger rod (65). The numbers of the first piston (71) and the second piston (73) are both equal to that of the sampling cylinders (5). The second piston (73) is located at one end of the sampling cylinder (5) close to the bottom of the measuring cylinder (2). Second through holes (74) communicating with each other are formed on the surface away from the axis of the measuring cylinder (2) and the surface close to the first piston (71) to block the corresponding end of the sampling cylinder (5). The first piston (71) is located at the other end of the corresponding sampling cylinder (5). First through holes (72) communicating with each other are formed on the surface close to the axis of the measuring cylinder (2) and the surface close to the second piston (73). An air guide pipe (75) is coaxially installed through the measuring cylinder (2). The lower part of the air guide pipe (75) is fixed to the surface of the sampling cylinder (5) close to its own axis. Third through holes (76) are formed between the air guide pipe (75) and each sampling cylinder (5). The third through holes (76) are arranged in a staggered manner with the first through holes (72). One end of the air guide pipe (75) close to the top of the measuring cylinder (2) is connected to the air inlet of the micro air pump (1). A hand-held sleeve (77) is wrapped around the micro air pump (1). The hand-held sleeve (77) wraps around the periphery of the air guide pipe (75) close to the micro air pump (1).

6. The leachate sampling device according to claim 5, wherein: One end of the air guide pipe (75) close to the bottom of the measuring cylinder (2) is provided with a flow guiding head (78). The flow guiding head (78) is in the shape of a mushroom.

7. The leachate sampling device according to claim 6, characterized in that: When all the sampling cylinders (5) are sealed by the second piston (73), the elastic force of the spring (68) on the single trigger rod (65) is equal to the sum of the frictional forces between the first piston (71) and the second piston (73) and the inner wall of the corresponding sampling cylinder (5).

8. The leachate sampling device according to claim 7, wherein: The frictional force between adjacent joint rods in the multi-stage telescopic rod (62) increases step by step from the top of the measuring cylinder (2) to the top surface of the sector block (35), and the length of a single joint rod is 10 - 20 cm.

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