Sampling device for airport pavement engineering water pollution detection

Abstract

The invention discloses a sampling device for airfield pavement engineering water pollution detection, which comprises a vehicle body, the vehicle body is fixedly connected with a hand-push frame, the front end of the vehicle body is fixedly connected with two suspenders, the two suspenders are movably connected with a lifting plate, the lifting plate is connected with five filter pipes in a penetrating manner, and the five filter pipes are connected with the hand-push frame. The device has the beneficial effects that water samples can be mixed and prepared through the arranged sample mixing box, the mixed water samples can be input into a flow dividing box for flow dividing, the flow dividing box can be used for flow dividing, the flow dividing box can be used for flow dividing, and the flow dividing box can be used for flow dividing; the arranged sample test tubes are in butt joint with the output tube on the shunting box, so that a water sample in the shunting box can be automatically shunted into the five sample test tubes, and therefore, simultaneous preparation of multiple samples is facilitated, rapid sampling and preparation are facilitated, and detection after sampling and preparation is facilitated.

Description

Technical Field

[0001] This invention belongs to the field of water pollution detection and sampling technology, and particularly relates to a sampling device for water pollution detection in airport pavement engineering. Background Technology

[0002] With the development of aviation technology, pavement design and construction are constantly being optimized. The Civil Aviation Administration of China has clarified the maximum load and tire pressure limits for pavements, incorporating them into civil airport construction specifications. In 2023, prefabricated airport pavement technology obtained a patent, improving construction efficiency and smoothness by connecting precast reinforced concrete slabs with prestressed steel bars. Furthermore, pavement maintenance requires strict adherence to procedures, including regular de-icing, crack repair, and friction coefficient testing to ensure airworthiness and safety.

[0003] During pavement construction, sampling and testing of the pavement surface are required, necessitating the use of water pollution detection sampling devices. However, existing sampling devices mainly rely on manual suction to extract water samples from the pavement surface. This method is inefficient, and the water samples are often contaminated. Furthermore, the extracted water samples require further processing before testing, making rapid sampling and testing difficult. In addition, the contaminants in the water samples can pollute the equipment, thus having a certain impact. Therefore, there is an urgent need for a water pollution detection sampling device for airport pavement construction to solve the above problems. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a sampling device for detecting water pollution in airport pavement engineering. This invention is achieved through the following technical solution.

[0005] A sampling device for detecting water pollution in airport pavement engineering includes a vehicle body. A pusher frame is fixedly connected to the upper part of the vehicle body. Two booms are fixedly connected to the front end of the vehicle body. A lifting plate is movably connected to the two booms. Five filter tubes are connected through the lifting plate. A sampling tube is fixedly connected to one end of each filter tube. A sample preparation box is fixedly connected to the top of the vehicle body. A first pipe and a second pipe are connected through the top of the sample preparation box. A collection pipe is fixedly connected to one end of the first pipe. Five first flexible hoses are connected through the outer surface of the collection pipe, and one end of each first flexible hose is fixedly connected to a filter tube. A vacuum pump is fixedly connected to one end of the second pipe. The sample preparation box also includes a sample preparation mechanism, which includes:

[0006] A first movable seat, on which a first electric telescopic rod is fixedly connected, and a support base is fixedly connected to the telescopic end of the first electric telescopic rod. A sample mixing box is clamped and fixedly attached to the top of the support base, and a diversion box is fixedly connected to the bottom of the first movable seat. An output pipe that communicates with each other is fixedly connected to the bottom of the diversion box.

[0007] The second movable seat is fixedly connected to the second movable seat. The telescopic end of the second electric telescopic rod is fixedly connected to the test tube rack. The sample test tubes set on the top of the test tube rack are connected to the output tubes, and the sample test tubes and output tubes are in one-to-one correspondence of five sets.

[0008] Both the first movable seat and the second movable seat are movably connected to the vehicle body via slide rails;

[0009] A servo motor is fixedly connected to the top of the vehicle body, and a lead screw is fixedly connected to the output shaft of the servo motor. One end of the lead screw passes through the lifting plate and is threadedly engaged with it.

[0010] A controller is fixedly connected to the vehicle body, and the servo motor, air pump, first electric telescopic rod and second electric telescopic rod are all electrically connected to the controller via wires.

[0011] Furthermore, the filter tube is threadedly fitted with the sampling tube, the filter element fixed on the sampling tube is embedded inside the filter tube, and the sampling tube is connected to the filter tube through the filter element.

[0012] Furthermore, two first sliding rods are symmetrically fixed on the outer surface of the sampling tube. A first spring is fixedly connected to one end of the first sliding rod, and a hanging plate fixed to one end of the first spring is movably sleeved on the first sliding rod. A roller is rotatably connected to one end of the hanging plate.

[0013] Furthermore, two limiting ports are symmetrically opened on the top of the support base. A second sliding rod is fixedly connected inside the support base at the position directly below the limiting port. A second spring is fixedly connected to both ends of the second sliding rod. A clamping plate is fixedly connected to one end of the second spring. The clamping plate passes through the limiting port and is movably engaged with the support base. The clamping plate is also slidably engaged with the second sliding rod.

[0014] Furthermore, a stirring motor is fixedly connected to one side of the sample mixing chamber, and a rotating rod fixed to the output shaft of the stirring motor is rotatably connected to the sample mixing chamber. A stirring impeller is fixedly connected to the rotating rod, and the stirring motor is electrically connected to the controller via wires.

[0015] Furthermore, a second flexible hose is connected through the top of the diversion box. One end of the second flexible hose passes through the first movable seat and is fixedly connected to the sample mixing box, and the sample mixing box is located above the diversion box. A valve is provided on the second flexible hose, and the valve is electrically connected to the controller through an electric wire.

[0016] Furthermore, the output tube has a conical delivery port inside, and a first hanger is fixedly connected inside the output tube. A central rod is slidably connected to the first hanger. A conical plug fixed at one end of the central rod is embedded in the conical delivery port. A third spring is fixedly connected to the top of the conical plug, and one end of the third spring is fixedly connected to the first hanger. A second hanger is fixedly connected to the other end of the central rod. A telescopic tube fixed on the second hanger is movably engaged with the output tube. An annular baffle is fixedly connected to one end of the telescopic tube, and a sealing ring is fixedly connected to the other end of the telescopic tube. The telescopic tube is sealed with the output tube through the sealing ring.

[0017] Furthermore, the top of the test tube rack is provided with a positioning hole, and the sample test tube is connected to the test tube rack through the positioning hole. A test tube base is fixedly connected inside the test tube rack. The positioning groove on the test tube base is located directly below the positioning hole. A rubber pad is embedded inside the positioning groove, and the bottom end of the sample test tube is embedded in the positioning groove.

[0018] The beneficial effects of this invention are:

[0019] 1. Firstly, the five sets of sampling tubes can simultaneously sample multiple points on the pavement, improving sampling efficiency. The filter tubes and filter cartridges can filter the water samples, preventing water contaminants from clogging the device.

[0020] 2. Then, the water sample can be mixed and prepared by the set sample mixing box. The mixed sample can be fed into the split box for splitting. Then, the set sample tubes are connected to the output tubes on the split box, so that the water sample inside the split box can be automatically split into five sample tubes. This makes it easy to prepare multiple samples at the same time, facilitates rapid sampling and preparation, and makes it convenient to test after sampling and preparation.

[0021] 3. Finally, the filter cartridges, sampling tubes, sample mixing chambers, and sample tubes can all be disassembled for easy cleaning and reuse. Attached Figure Description

[0022] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 : A schematic diagram of the structure of a sampling device for detecting water pollution in airport pavement engineering according to the present invention;

[0024] Figure 2 This invention Figure 1A schematic diagram of the rear view structure;

[0025] Figure 3 : A schematic diagram of the connection between the filter tube and the lifting plate of the present invention;

[0026] Figure 4 : A schematic diagram showing the connection between the filter tube, sampling tube, and filter element of this invention;

[0027] Figure 5 : A schematic diagram of the connection between the sampling tube and the roller in this invention;

[0028] Figure 6 : Internal schematic diagram of the sample preparation box of this invention;

[0029] Figure 7 : Schematic diagram of the connection mechanism between the support base and the clamping plate of the present invention;

[0030] Figure 8 : Internal schematic diagram of the sample mixing chamber of this invention;

[0031] Figure 9 : A cross-sectional view of the test tube rack of the present invention;

[0032] Figure 10 : A schematic diagram of the connection between the telescopic tube and the output tube of this invention;

[0033] Figure 11 : Top view of the connection between the telescopic tube and the central rod of the present invention.

[0034] The attached figures are labeled as follows:

[0035] 1. Car body; 11. Hand-push frame; 12. Hoist; 121. Lifting plate; 13. Servo motor; 131. Lead screw;

[0036] 2. Sample preparation box; 21. First movable seat; 211. First electric telescopic rod; 22. Second movable seat; 221. Second electric telescopic rod; 23. First pipe; 231. Compression pipe; 232. First flexible hose; 24. Second pipe; 241. Air pump; 25. Sealing gasket;

[0037] 3. Filter tube; 31. Sampling tube; 311. First slide bar; 312. Hanging plate; 313. Roller; 314. First spring; 32. Filter element;

[0038] 4. Support base; 41. Limiting port; 42. Second slide rod; 421. Second spring; 43. Clamping plate;

[0039] 5. Sample mixing chamber; 51. Stirring motor; 52. Rotating rod; 521. Stirring impeller;

[0040] 6. Diverter box; 61. Second hose; 611. Valve;

[0041] 7. Output pipe; 71. First hanger; 72. Center rod; 721. Conical plug; 722. Third spring; 723. Second hanger; 73. Telescopic pipe; 731. Annular baffle; 732. Sealing ring;

[0042] 8. Test tube rack; 81. Positioning hole; 82. Test tube holder; 821. Positioning groove; 822. Rubber pad;

[0043] 9. Sample tubes;

[0044] 10. Controller. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] like Figure 1-11 As shown, the present invention has the following specific embodiments.

[0047] Example 1:

[0048] A sampling device for detecting water pollution in airport pavement engineering includes a vehicle body 1. A pusher frame 11 is fixedly connected to the upper part of the vehicle body 1. Two booms 12 are fixedly connected to the front end of the vehicle body 1. A lifting plate 121 is movably connected to the two booms 12. Five filter tubes 3 are connected through the lifting plate 121. A sampling tube 31 is fixedly connected to one end of each filter tube 3. A sample preparation box 2 is fixedly connected to the top of the vehicle body 1. A first pipe 23 and a second pipe 24 are connected through the top of the sample preparation box 2. A collection pipe 231 is fixedly connected to one end of the first pipe 23. Five first flexible hoses 232 are connected through the outer surface of the collection pipe 231, and one end of each first flexible hose 232 is fixedly connected to the filter tube 3. A vacuum pump 241 is fixedly connected to one end of the second pipe 24. The sample preparation box 2 also includes a sample preparation mechanism, which includes:

[0049] The first movable seat 21 is fixedly connected to the first movable seat 21, the telescopic end of the first electric telescopic rod 211 is fixedly connected to the support seat 4, the top of the support seat 4 clamps and fixes the sample mixing box 5, the bottom of the first movable seat 21 is fixedly connected to the diversion box 6, and the bottom of the diversion box 6 is fixedly connected to the interconnected output pipe 7.

[0050] The second movable seat 22 is fixedly connected to the second movable seat 22, and the telescopic end of the second electric telescopic rod 221 is fixedly connected to the test tube rack 8. The sample test tubes 9 set on the top of the test tube rack 8 are connected to the output tube 7, and the sample test tubes 9 and the output tube 7 are in one-to-one correspondence of five groups.

[0051] Both the first movable seat 21 and the second movable seat 22 are movably connected to the car body 1 via slide rails;

[0052] A servo motor 13 is fixedly connected to the top of the vehicle body 1. A lead screw 131 is fixedly connected to the output shaft of the servo motor 13. One end of the lead screw 131 passes through the lifting plate 121 and is threadedly engaged with it.

[0053] A controller 10 is fixedly connected to the vehicle body 1. The servo motor 13, the air pump 241, the first electric telescopic rod 211 and the second electric telescopic rod 221 are all electrically connected to the controller 10 through wires.

[0054] In this embodiment, as Figure 1 and 2 As shown, firstly, the hand-held pusher 11 pushes the vehicle body 1 to the designated position, and then the controller 10 controls the operation of the servo motor 13, the air pump 241, the first electric telescopic rod 211 and the second electric telescopic rod 221 respectively.

[0055] The servo motor 13 can drive the lead screw 131 to rotate. The lead screw 131 drives the lifting plate 121 to rise and fall on the boom 12. The rising and falling lifting plate 121 drives the connected filter tube 3 and sampling tube 31 to rise and fall, so that the sampling tube 31 can contact the water sample for extraction.

[0056] Then, the second pipe 24 is set up to evacuate the sample mixing box 5 connected by the air pump 241. After the sample mixing box 5 is evacuated, a negative pressure is generated, which causes the sample mixing box 5 to evacuate the connected collection pipe 231 through the first pipe 23. The collection pipe 231 evacuates the connected filter pipe 3 through the first hose 232, so that the water sample sucked in by the sampling tube 31 is filtered through the filter pipe 3 and then input into the sample mixing box 5 for mixing and preparation.

[0057] Then, after the water samples inside the sample mixing tank 5 are mixed, the water samples inside the sample mixing tank 5 flow into the diversion tank 6 by opening the valve 611 on the second hose 61.

[0058] Finally, the sample tube 9 is positioned on the test tube rack 8. By opening the second electric telescopic rod 221, the sample tube 9 is pushed to connect with the output tube 7 on the diversion box 6. The sample tube 9 squeezes and opens the output tube 7, and the water sample inside the diversion box 6 can automatically flow into the connected sample tube 9 through the output tube 7, so that the five sample tubes 9 can be sampled separately.

[0059] The above enables the device to extract and filter water samples from multiple points in pavement engineering. The filtered water samples can be mixed and prepared, and then the mixed water samples can be stored separately, which facilitates the simultaneous preparation of multiple water samples and makes sampling and preparation easier.

[0060] Example 2:

[0061] The filter tube 3 is threadedly engaged with the sampling tube 31. The filter element 32 fixed on the sampling tube 31 is embedded inside the filter tube 3, and the sampling tube 31 is connected to the filter tube 3 through the filter element 32.

[0062] Two first slide rods 311 are symmetrically fixed on the outer surface of the sampling tube 31. A first spring 314 is fixedly connected to one end of the first slide rod 311. A hanging plate 312 fixed to one end of the first spring 314 is movably sleeved on the first slide rod 311. A roller 313 is rotatably connected to one end of the hanging plate 312.

[0063] In this embodiment, as Figure 3 , 4 As shown in Figure 5, the servo motor 13 can drive the lead screw 131 to rotate, the lead screw 131 can drive the lifting plate 121 to rise and fall, and the lifting plate 121 can push the sampling tube 31 connected to the filter tube 3 to rise and fall. When the sampling tube 31 contacts the airport pavement, the hanging plate 312 connected to the sampling tube 31 first contacts the ground through the roller 313. When the roller 313 contacts the ground, it will generate a reaction force, thereby pushing the hanging plate 312 to slide on the first sliding rod 311 and squeezing the first spring 314. Then the sampling tube 31 descends and contacts the ground, which has a buffering effect, preventing the sampling tube 31 from being unable to pump water and take samples when inserted into the airport pavement. When the filter tube 3 pumps water through the sampling tube 31, the water sample first passes through the filter element 32 connected to the sampling tube 31 for filtration, and the filtered water sample is then output through the filter tube 3, thereby pre-treating the water sample and avoiding clogging of the device during sampling.

[0064] In further explanation of this embodiment, the filter element 32, sampling tube 31, filter tube 3 and first hose 232 are connected by a threaded connection, which allows the filter element 32, sampling tube 31, filter tube 3 and first hose 232 to be disassembled and assembled, which facilitates the disassembly and cleaning of the filter element 32 and thus improves the service life of the device.

[0065] Example 3:

[0066] The top of the support base 4 has two symmetrical limiting ports 41. Inside the support base 4, a second slide rod 42 is fixedly connected to the position directly below the limiting ports 41. Both ends of the second slide rod 42 are fixedly connected to a second spring 421. One end of the second spring 421 is fixedly connected to a clamping plate 43. The clamping plate 43 passes through the limiting ports 41 and is movablely engaged with the support base 4. The clamping plate 43 is also slidably engaged with the second slide rod 42.

[0067] A stirring motor 51 is fixedly connected to one side of the sample mixing chamber 5. The rotating rod 52, whose output shaft is fixed, is rotatably connected to the sample mixing chamber 5. A stirring impeller 521 is fixedly connected to the rotating rod 52. The stirring motor 51 is electrically connected to the controller 10 through a wire.

[0068] A second hose 61 is connected through the top of the split box 6. One end of the second hose 61, which passes through the first movable seat 21, is fixedly connected to the sample mixing box 5. The sample mixing box 5 is located above the split box 6. A valve 611 is provided on the second hose 61, and the valve 611 is electrically connected to the controller 10 through a wire.

[0069] In this embodiment, as Figure 7 and 8 As shown, the sample mixing box 5 is positioned between two clamping plates 43 on the support base 4. The clamping plates 43 can slide on the second slide rod 42, and the clamping plates 43 can compress the second spring 421 sleeved on the second slide rod 42. The compressed second spring 421 can generate a reaction force, which can push the clamping plates 43 to clamp and fix the sample mixing box 5, thereby facilitating the assembly and disassembly of the sample mixing box 5 from the support base 4.

[0070] Further explanation of this embodiment: by turning on the stirring motor 51, the rotating rod 52 can be driven to rotate. The rotating rod 52 can drive the connected stirring impeller 521 to rotate inside the sample mixing box 5. The rotating stirring impeller 521 can mix and stir the water sample extracted inside the sample mixing box 5. After stirring, the valve 611 on the second hose 61 is opened, so that the stirred water sample can be input into the diversion box 6 through the connected second hose 61.

[0071] Example 4:

[0072] The output pipe 7 has a tapered delivery port inside. A first hanger 71 is fixedly connected inside the output pipe 7. A central rod 72 is slidably connected to the first hanger 71. A tapered plug 721 fixed at one end of the central rod 72 is embedded in the tapered delivery port. A third spring 722 is fixedly connected to the top of the tapered plug 721. One end of the third spring 722 is fixedly connected to the first hanger 71. A second hanger 723 is fixedly connected to the other end of the central rod 72. A telescopic pipe 73 fixed on the second hanger 723 is movably engaged with the output pipe 7. An annular baffle 731 is fixedly connected to one end of the telescopic pipe 73. A sealing ring 732 is fixedly connected to the other end of the telescopic pipe 73. The telescopic pipe 73 is sealed with the output pipe 7 through the sealing ring 732.

[0073] The top of the test tube rack 8 is provided with a positioning hole 81. The sample test tube 9 is connected to the test tube rack 8 through the positioning hole 81. The test tube rack 8 is fixedly connected inside the test tube rack 8. The positioning groove 821 on the test tube base 82 is located directly below the positioning hole 81. A rubber pad 822 is embedded inside the positioning groove 821, and the bottom end of the sample test tube 9 is embedded in the positioning groove 821.

[0074] In this embodiment, as Figure 9 As shown, the test tube rack 8 can position the sample test tube 9 and connect the sample test tube 9 with the output tube 7, so that the output tube 7 can automatically deliver the sample into the connected sample test tube 9. That is, the test tube rack 8 can position and insert the sample test tube 9 from the top through the positioning hole 81, and insert the bottom end of the sample test tube 9 into the positioning groove 821 of the test tube seat 82 for limitation. The rubber pad 822 fixed in the positioning groove 821 can protect the bottom end of the sample test tube 9, thus facilitating the positioning and placement of five sample test tubes 9.

[0075] For further explanation of this embodiment, as follows: Figure 10 and 11As shown, the second electric telescopic rod 221 on the second movable seat 22 can push the connected test tube rack 8 to rise and fall, and the rising sample tube 9 can push the placed sample tube 9 to rise and fall. The top of the sample tube 9 can dock with the corresponding output tube 7. During the docking process of the sample tube 9 with the output tube 7, firstly, the sample tube 9 contacts the annular baffle 731 and applies upward pressure. The annular baffle 731 can push the telescopic tube 73 to move upward within the output tube 7. At the same time, the telescopic tube 73 is sealed with the output tube 7 through the sealing ring 732. The upwardly moving telescopic tube 73 pushes the center rod 72 through the connected second hanger 723. The sample tube rises on the first hanger 71. The rising center rod 72 can push the connected conical plug 721 to open the conical delivery port inside the output tube 7. At this time, the water sample inside the diversion box 6 can automatically flow into the sample tube 9 through the output tube 7, which facilitates the simultaneous preparation of multiple water samples. When the sample tube 9 descends and detaches from the output tube 7, the third spring 722 after the conical plug 721 is squeezed can be reset, thereby pushing the conical plug 721 to seal and embed itself in the conical delivery port of the output tube 7, thereby stopping the output of water samples and facilitating the reconnection of the sample tube 9 to the output tube 7 for water sample delivery.

[0076] The specific working principle of this invention:

[0077] like Figure 6 As shown, the sample mixing box 5 is first placed on the support base 4 and clamped, so that the first movable seat 21 pushes the clamped sample mixing box 5 into the sample preparation box 2. Then, by opening the first electric telescopic rod 211, the top of the sample mixing box 5 is pushed to seal against the sample preparation box 2 through the sealing gasket 25, and the first pipe 23 and the second pipe 24 are connected to the sample mixing box 5.

[0078] Then, position the five sample tubes 9 on the test tube rack 8, so that the second movable seat 22 pushes the sample tubes 9 into the sample preparation box 2;

[0079] like Figure 1 and 3 As shown, the servo motor 13 is then turned on to drive the lifting plate 121 to rise and fall. The lifting plate 121 drives the filter tube 3 to rise and fall. The filter tube 3 can be inserted into the water on the pavement through the sampling tube 31 to take a sample. During sampling, the filter tube 3 can filter the water sample to prevent pollutants in the water sample from clogging the device.

[0080] like Figure 6 , 8 As shown, when the vacuum pump 241 is turned on, air is drawn from the connected sample mixing box 5 through the second pipe 24. The negative pressure generated by the air drawing from the sample mixing box 5 allows water samples to be drawn into the sample mixing box 5. The water samples inside the sample mixing box 5 are stirred and mixed by the stirring impeller 521 driven by the stirring motor 51. The mixed samples enter the diversion box 6 through the second hose 61.

[0081] like Figure 8 and 10 As shown, by pushing the sample tube 9 up to connect with the output tube 7, the output tube 7 can open automatically after connection, thereby diverting the water sample inside the diversion box 6 for easy storage of the five sample tubes 9 respectively.

[0082] In summary, multiple sampling points can be used for water sampling, enabling dispersed water collection and improving water collection efficiency. After sampling, the samples can be mixed, and the mixed water samples are then input into the sample test tube 9 through the output tube 7 for storage. This facilitates simultaneous sampling at multiple points, and the samples can be mixed and prepared before being diverted for rapid preparation of multiple samples.

[0083] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A sampling device for detecting water pollution in airport pavement engineering, comprising a vehicle body (1), wherein a pusher frame (11) is fixedly connected to the upper part of the vehicle body (1), characterized in that, Two booms (12) are fixedly connected to the front end of the vehicle body (1). A lifting plate (121) is movably connected to the two booms (12). Five filter tubes (3) are connected through the lifting plate (121). A sampling tube (31) is fixedly connected to one end of each filter tube (3). A sample preparation box (2) is fixedly connected to the top of the vehicle body (1). A first pipe (23) and a second pipe (24) are connected through the top of the sample preparation box (2). A collection pipe (231) is fixedly connected to one end of the first pipe (23). Five first hoses (232) are connected through the outer surface of the collection pipe (231). One end of each first hose (232) is fixedly connected to the filter tube (3). A vacuum pump (241) is fixedly connected to one end of the second pipe (24). The sample preparation box (2) also includes a sample preparation mechanism, which includes: A first movable seat (21) is fixedly connected to a first electric telescopic rod (211), and a support seat (4) is fixedly connected to the telescopic end of the first electric telescopic rod (211). A sample mixing box (5) is clamped and fixed at the top of the support seat (4), and a diversion box (6) is fixedly connected to the bottom of the first movable seat (21). An output pipe (7) that communicates with each other is fixedly connected to the bottom of the diversion box (6). The second movable seat (22) is fixedly connected to the second movable seat (22), and the telescopic end of the second electric telescopic rod (221) is fixedly connected to the test tube rack (8). The sample test tube (9) set on the top of the test tube rack (8) is connected to the output tube (7), and the sample test tube (9) and the output tube (7) are in a one-to-one correspondence of five sets; The first movable seat (21) and the second movable seat (22) are both movably connected to the vehicle body (1) via slide rails; A servo motor (13) is fixedly connected to the top of the vehicle body (1), and a lead screw (131) is fixedly connected to the output shaft of the servo motor (13). One end of the lead screw (131) passes through the lifting plate (121) and is threadedly engaged with it. A controller (10) is fixedly connected to the vehicle body (1). The servo motor (13), the air pump (241), the first electric telescopic rod (211), and the second electric telescopic rod (221) are all electrically connected to the controller (10) via wires. A rubber pad (25) is fixedly connected to the top of the sample preparation box (2), and the sample preparation box (2) is sealed to the sample mixing box (5) through the rubber pad (25).

2. The sampling device for detecting water pollution in airport pavement engineering according to claim 1, characterized in that: The filter tube (3) is threadedly engaged with the sampling tube (31), and the filter element (32) fixed on the sampling tube (31) is embedded inside the filter tube (3), and the sampling tube (31) is connected to the filter tube (3) through the filter element (32).

3. A sampling device for detecting water pollution in airport pavement engineering according to claim 2, characterized in that: Two first slide rods (311) are symmetrically fixed on the outer surface of the sampling tube (31). A first spring (314) is fixedly connected to one end of the first slide rod (311). A hanging plate (312) fixed to one end of the first spring (314) is movably sleeved on the first slide rod (311). A roller (313) is rotatably connected to one end of the hanging plate (312).

4. A sampling device for detecting water pollution in airport pavement engineering according to claim 1, characterized in that: The top of the support base (4) has two symmetrical limiting ports (41). A second slide rod (42) is fixedly connected inside the support base (4) at a position directly below the limiting ports (41). A second spring (421) is fixedly connected to both ends of the second slide rod (42). A clamping plate (43) is fixedly connected to one end of the second spring (421). The clamping plate (43) passes through the limiting ports (41) and is movably engaged with the support base (4). The clamping plate (43) and the second slide rod (42) are slidably engaged.

5. A sampling device for detecting water pollution in airport pavement engineering according to claim 1, characterized in that: A stirring motor (51) is fixedly connected to one side of the sample mixing box (5). The rotating rod (52) fixed to the output shaft of the stirring motor (51) is rotatably connected to the sample mixing box (5). A stirring impeller (521) is fixedly connected to the rotating rod (52). The stirring motor (51) is electrically connected to the controller (10) through a wire.

6. A sampling device for detecting water pollution in airport pavement engineering according to claim 1, characterized in that: The top of the diversion box (6) is connected to a second hose (61). One end of the second hose (61) that passes through the first movable seat (21) is fixedly connected to the sample mixing box (5), and the sample mixing box (5) is located above the diversion box (6). A valve (611) is provided on the second hose (61), and the valve (611) is electrically connected to the controller (10) through a wire.

7. A sampling device for detecting water pollution in airport pavement engineering according to claim 1, characterized in that: The output pipe (7) is provided with a conical conveying port inside. A first hanger (71) is fixedly connected inside the output pipe (7). A central rod (72) is slidably connected to the first hanger (71). A conical plug (721) fixed at one end of the central rod (72) is embedded in the conical conveying port. A third spring (722) is fixedly connected to the top of the conical plug (721). One end of the third spring (722) is fixedly connected to the first hanger (71). A second hanger (723) is fixedly connected to the other end of the central rod (72). A telescopic tube (73) fixed on the second hanger (723) is movably engaged with the output pipe (7). An annular baffle (731) is fixedly connected to one end of the telescopic tube (73). A sealing ring (732) is fixedly connected to the other end of the telescopic tube (73). The telescopic tube (73) is sealed with the output pipe (7) through the sealing ring (732).

8. A sampling device for detecting water pollution in airport pavement engineering according to claim 1, characterized in that: The test tube rack (8) has a positioning hole (81) at the top. The sample test tube (9) is connected to the test tube rack (8) through the positioning hole (81). The test tube rack (8) has a test tube seat (82) fixedly connected inside. The positioning groove (821) on the test tube seat (82) is located directly below the positioning hole (81). A rubber pad (822) is embedded inside the positioning groove (821), and the bottom end of the sample test tube (9) is embedded in the positioning groove (821).

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