Sampling device for detecting water quality of natural water body

Abstract

The invention belongs to the technical field of water quality detection sampling devices, and particularly provides a natural water quality detection sampling device which comprises a fixing frame, a floating type main supporting frame assembly, a light telescopic connecting frame assembly and a split type sampling pipe, the floating type main supporting frame assembly is arranged on one side of the fixing frame, and the light telescopic connecting frame assembly is arranged on the other side of the fixing frame; the light telescopic connecting frame assembly is arranged on the inner side of the floating type main supporting frame assembly in a sliding mode, and the split type sampling pipes are arranged on the lower portion of the light telescopic connecting frame assembly in a circumferential array mode; the embedded principle is combined with the electromagnetic principle, irregular water flow impact of natural water is resisted through transition connection of a hard structure, the downward moving distance of the split type sampling pipe is conveniently and accurately calculated, the technical effect of collecting a water sample in a designated area or depth is achieved, the length limitation of a traditional long rod is broken through, and the water sample in a deep water area can be collected. Meanwhile, continuous sampling in different areas can be carried out, and the sampling efficiency is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of water quality detection sampling devices, and specifically refers to a sampling device for natural water body water quality detection. Background Art

[0002] Natural water bodies mainly include rivers, lakes, reservoirs, and oceans, etc. With the increasingly serious water resource pollution, people pay more and more attention to the ecological environment protection of natural water bodies, and the collection of water samples and the detection of water quality run through the entire process of pollution control and ecological restoration.

[0003] The existing water quality detection methods generally collect water samples from the target water area directly and then transport them to the laboratory for detection. However, for the existing water quality detection device, the sampling tube is put into the water body through a cable for sampling. Due to the irregular water flow impact in the natural water body, it is difficult to estimate the position and depth of the sampling tube in the water body, and it is difficult to collect water samples from a specified area or depth. When using a long rod to directly insert the sampling tube into the water body for sampling, it is difficult to reach deeper water areas due to the limitation of the rod length, and only one sampling can be carried out each time, making it difficult to continuously sample different areas, with difficult operation and low efficiency. In addition, the collected water samples often contain other solid pollutants, and secondary separation is required during detection, reducing the detection efficiency. Summary of the Invention

[0004] To solve the above existing problems, the present invention provides a sampling device for natural water body water quality detection, which adopts the nested principle and combines with the electromagnetic principle, sets up a light telescopic connecting frame assembly, and through the transition connection of the rigid structure, resists the irregular water flow impact in the natural water body, so that the split sampling tube will not float with the water flow in the water body, facilitating the accurate calculation of the downward movement distance of the split sampling tube, achieving the technical effect of collecting water samples from a specified area or depth, and breaking through the length limitation of the traditional long rod, being able to collect water samples from deeper water areas, and at the same time, continuous sampling of different areas can be carried out with high sampling efficiency. At the same time, when collecting water samples, the solid pollutants in the water samples are filtered out and stored separately through a filter screen, improving the subsequent water quality detection efficiency.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows: A sampling device for natural water body water quality detection provided by the present invention includes a fixed frame, and the fixed frame is arranged in a U shape; it also includes a floating main support frame assembly, a light telescopic connecting frame assembly, and a split sampling tube. The floating main support frame assembly is arranged on one side of the fixed frame, the light telescopic connecting frame assembly is slidably arranged inside the floating main support frame assembly, and the split sampling tube is arranged in a circumferential array at the lower part of the light telescopic connecting frame assembly; Furthermore, the floating main support frame assembly includes a floating plate, a first support plate, a second support plate and a line-releasing mechanism, the floating plate is horizontally arranged, the floating plate is made of foam material, and has greater buoyancy in water, a movable groove is penetrated through the floating plate, the first support plate and the second support plate are symmetrically arranged above the floating plate, the first support plate and the second support plate are vertically arranged above the movable groove, the first support plate is slidably connected to the fixed frame, and the line-releasing mechanism is connected and arranged between the first support plate and the second support plate; Furthermore, the light telescopic connecting frame assembly includes a first telescopic mechanism, a second telescopic mechanism, a third telescopic mechanism and a sampling rack mechanism, the first telescopic mechanism is slidably arranged between the first support plate and the second support plate, the second telescopic mechanism is slidably arranged on the inner side of the first telescopic mechanism, the third telescopic mechanism is slidably arranged on the inner side of the second telescopic mechanism, and the sampling rack mechanism is arranged at the lower end of the third telescopic mechanism.

[0006] Furthermore, a first connecting ring, a second connecting ring and a third connecting ring are sequentially connected between the first support plate and the second support plate from bottom to top, and the wire-releasing mechanism is arranged above the third connecting ring; the first connecting ring is symmetrically provided with a first lap plate and a first positioning hole on the inner side of the side wall perpendicular to the first support plate, the first positioning hole is arranged below the first lap plate, and a first connecting groove is arranged on the upper wall of the first lap plate; the third connecting ring is symmetrically provided with a first positioning block on the inner side of the side wall perpendicular to the first support plate.

[0007] Further, the first telescopic mechanism includes a first telescopic plate, a first connecting plate, a second positioning block and a second lap plate, the first telescopic plate is symmetrically slidably arranged on the inner sides of the first connecting ring, the second connecting ring and the third connecting ring, the first telescopic plate is perpendicular to the first support plate and the second support plate, the first connecting plate is evenly connected between the first telescopic plates in the vertical direction, the second positioning block and the second lap plate are respectively arranged on the opposite side walls of the first telescopic plate, the second positioning block is arranged on the upper part of the inner wall of the first telescopic plate, the second lap plate is arranged on the lower part of the inner wall of the first telescopic plate, the upper wall of the second lap plate is provided with a second connecting groove, the first telescopic plate is penetrated by a second positioning hole, the opposite side wall of the first telescopic plate is not penetrated by a third positioning hole, the second positioning hole is arranged above the second lap plate, and the third positioning hole is arranged below the second lap plate; the second telescopic mechanism includes a second telescopic plate, a second connecting plate The third lap plate is provided with a third connecting groove, and a fourth positioning hole is penetrated through the second telescopic plate, and the fourth positioning hole is provided above the third lap plate; the third telescopic mechanism comprises a slide and a threading plate, the slide is slidably arranged on the inner side of the second connecting plate, the slide is arranged with an upper opening, the threading plate is horizontally arranged inside the slide, and water holes are evenly penetrated on the four sides of the slide, the first telescopic plate and the second telescopic plate to avoid damage caused by water flow impact.

[0008] Further, the first positioning block, the second positioning block and the third positioning block are arranged in an inverted J shape, and positioning plates are respectively arranged on the side wall of the slide toward the second telescopic plate, the side wall of the second telescopic plate toward the first telescopic plate, and the side wall of the first telescopic plate toward the first positioning block, an upper plugging block is arranged at the upper wall end of the positioning plate, and a lower plugging block is arranged at the lower wall end of the positioning plate, an electromagnetic block is arranged on the positioning plates on the slide and the second telescopic plate, and pressure sensing components are respectively arranged on the upper plugging blocks and the lower plugging blocks on the slide and the second telescopic plate, and the pressure sensing components are electrically connected to the electromagnetic block; In the initial state, the first positioning block, the second positioning block and the third positioning block are in the same horizontal state, the upper insert block on the slide is engaged in the third positioning block, the upper insert block on the second telescopic plate is engaged in the second positioning block, the upper insert block on the first telescopic plate is engaged in the first positioning block, and the sampling rack mechanism is in the movable groove; When the second extension plate is in the first position and the second extension plate is in the second position, the second extension plate is in the third position and the second extension plate is in the fourth position. In the connecting groove, at this time, the electromagnetic block on the second telescopic plate is opposite to the first magnetic plate, and the electromagnetic block on the second telescopic plate generates magnetism when it is energized, and its magnetic pole is arranged with the opposite pole to the magnetic pole of the first magnetic plate. The electromagnetic block on the second telescopic plate adsorbs the first magnetic plate, so that the first magnetic plate is separated from the first positioning socket, thereby releasing the positioning between the first telescopic plate and the first connecting ring, and the first magnetic plate in the second positioning socket is adsorbed and fixed with the electromagnetic block, so that the first telescopic plate slides in the first connecting ring and moves with the second telescopic plate and the slide; when the upper end of the first telescopic plate slides to the first connecting ring, the lower plug-in block on the first telescopic plate is engaged in the first connecting groove; in the process of the slide driving the split sampling tube to move downward, the transition connection of the hard structure is used to resist the impact of irregular water flow in the natural water body, so as to facilitate the accurate calculation of the downward movement distance of the split sampling tube, and the technical effect of collecting water samples in a specified area or depth is achieved, and the length limit of the traditional long rod is broken, so that water samples in deeper waters can be collected, and continuous sampling in different areas can be carried out at the same time, and the sampling efficiency is high.

[0009] Furthermore, the sampling rack mechanism includes a support rod, a rotating motor and an electric telescopic rod, the support rod is horizontally arranged in a circular array at the lower end of the slide, an extrusion column is vertically provided at the end of the support rod away from the slide, the outer wall of the extrusion column is provided with a thread, the rotating motor is arranged at the center of the lower end of the slide, the rotating motor is a stepping motor, the electric telescopic rod is coaxially arranged at the output end of the rotating motor, and an upper pressure rod is horizontally provided at the output end of the electric telescopic rod, and the upper pressure rod extends to the bottom of the extrusion column.

[0010] Furthermore, the split sampling tube includes a shell, a gland, a top plate and a filter screen, the gland is meshedly connected with the shell, the gland is a through structure, a telescopic column is provided at the inner center of the shell, a compression spring is provided in the telescopic column, the top plate is provided at the upper end of the telescopic column, the top plate is movably provided in the shell and the gland, a connecting thread ring is provided at the upper part of the top plate, the connecting thread ring is provided on the inner side of the gland, the connecting thread ring is meshedly connected with the lower end of the extrusion column, at this time, the lower end surface of the shell is flush with the lower end surface of the floating plate, so as to facilitate the calculation of the depth of the sampling tube entering the water body, the compressed compression spring provides a strong thrust for the top plate, offsets the buoyancy effect on the shell when entering the water body, so that the top plate and the gland are tightly pressed together, The interior of the shell is closed; when in use, the electric telescopic column is started, the upper pressure rod contracts and extends once, the upper pressure rod moves upward, and a shell above the upper pressure rod is pushed upward, the extrusion column limits the position of the top plate, the pressure spring is compressed, and the pressure cover is separated from the top plate. Due to the pressure in the water body, the water at the specified depth flows into the shell from between the pressure cover and the top plate, and then the upper pressure rod moves downward and no longer presses the shell. Under the elastic action of the pressure spring, the shell moves downward again, so that the top plate and the pressure cover are tightly fitted again, and the water sampling of the split sampling tube is completed; then the motor is turned to start, and the electric telescopic rod and the upper pressure rod are rotated as a whole by a certain angle, so that the upper pressure rod is rotated to the bottom of the next split sampling tube, and then moved to the next sampling point for water sampling.

[0011] Preferably, a magnetic ring is provided on the inner wall of the shell, a connecting ring is magnetically attached to the magnetic ring, the filter is connected to the inner side of the connecting ring, the filter is slidably sleeved on the outer side of the telescopic column, an elastic rope is connected to the center opening of the filter, the elastic rope is stretched out, the filter is passed over the top plate and sleeved onto the telescopic column, and the connecting ring is pressed to make it attracted and fixed to the magnetic ring, then the pressure cover is tightened to the shell, the pressure cover presses against the top plate, and the compression spring is in a compressed state, so that the top plate and the pressure cover are tightly fitted to avoid air leakage in the shell.

[0012] The cam is connected to the control wheel shaft and the control wheel shaft is connected with the control wheel shaft through the first support plate, and the control wheel shaft is connected with the control wheel shaft through the first support plate. Preferably, the first support plate and the second support plate are respectively penetrated by weight-reducing through grooves, and the first support plate is symmetrically provided with sliding grooves on the side walls facing the fixing frame, a fastening screw is rotatably provided on the fixing frame, a fixed extrusion plate is slidably provided on the inner side of the fixing frame, the fastening screw penetrates the fixing frame and is rotatably connected with the fixed extrusion plate, and a transition connecting plate is symmetrically provided on the side of the fixing frame away from the fastening screw, and the transition connecting plate is slidably arranged in the sliding groove; the fixing frame is clamped on the edge of the inspection ship, and the fastening screw is screwed. Under the clamping of the fixed extrusion plate and the fixing frame, the device is fixed on the hull, so that the inspection ship can drive the device to move. During the movement, the fixing frame is slidably connected with the first support plate through the transition connecting plate, so that the floating of the inspection ship in the vertical direction does not affect the floating of the floating main support frame assembly, thereby avoiding the calculation of the sampling depth being affected by the inspection ship.

[0013] The beneficial effects achieved by the present invention using the above structure are as follows: 1. The present invention provides a sampling device for natural water quality detection, which adopts the nesting principle and combines the electromagnetic principle, and is provided with a light telescopic connecting frame assembly. Through the transition connection of the hard structure, it resists the impact of irregular water flow in the natural water body, so that the split sampling tube will not float with the water flow in the water body, which is convenient for accurately calculating the downward movement distance of the split sampling tube, and realizes the technical effect of collecting water samples in a specified area or depth, and breaks the length limit of the traditional long pole, and can collect water samples in deeper waters. At the same time, continuous sampling in different areas can be performed, and the sampling efficiency is high; 2. A split sampling tube is set up, which is easy to install and use through the split meshing connection structure. When collecting water samples, the solid pollutants in the water samples are filtered out through the filter screen first and stored separately, which improves the efficiency of subsequent water quality testing; 3. The entire device is suspended on the water surface through the floating plate, and is clamped on the edge of the inspection ship through the fixed frame, so that the inspection ship can drive the device to move. During the movement, the fixed frame is slidably connected to the first support plate through the transition connecting plate, so that the floating of the inspection ship in the vertical direction does not affect the floating of the floating main support frame assembly, thereby avoiding the calculation of the sampling depth being affected by the inspection ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a sampling device for natural water quality detection provided by the present invention; Figure 2 A schematic diagram of the structure of a sampling device for natural water quality detection provided by the present invention when the light telescopic connecting frame assembly is extended during operation; Figure 3 It is a structural schematic diagram of a floating main support frame assembly; Figure 4 It is a front view of the floating main support frame assembly; Figure 5 It is a schematic diagram of the combined structure of the first connecting ring, the second connecting ring, the third connecting ring, the wire-releasing mechanism and the light telescopic connecting frame assembly; Figure 6 is a structural schematic diagram of a first telescopic mechanism; Figure 7 is a structural schematic diagram of a second telescopic mechanism; Figure 8 It is a schematic diagram of the combined structure of the third telescopic mechanism, the sampling rack mechanism and the split sampling tube; Fig. 9 It is a schematic cross-sectional view of the combined structure of the first connecting ring, the second connecting ring, the third connecting ring, the wire-releasing mechanism and the light telescopic connecting frame assembly; Fig.10 for Fig. 9 A schematic diagram of the local enlarged structure at point A in the middle; Fig.11 for Fig. 9 A schematic diagram of the local enlarged structure at B in the middle; Fig.12 It is a schematic diagram of the structure of a split sampling tube; Fig.13 It is a schematic diagram of the cross-sectional structure of a split sampling tube; Fig.14 Schematic diagram of the explosion structure of the split sampling tube.

[0015] Among them, 1. Fixed frame, 11. Tightening screw, 12. Transition connecting plate, 13. Fixed extrusion plate, 2. Floating main support frame assembly, 21. Floating plate, 211. Activity groove, 22. First support plate, 23. Second support plate, 24. First connecting ring, 241. First overlapping plate, 242. First connecting groove, 243. First positioning jack, 25. Second connecting ring, 26. Third connecting ring, 261. First positioning block, 27. Wire releasing mechanism, 271. Wire releasing motor, 272. Winding shaft, 273. Guide wheel shaft, 274. Pulling rope, 275.拨动 wheel, 276. Counter, 277. Paddle, 28. Sliding groove, 29. Weight reduction through groove, 3. Light telescopic connecting frame assembly, 31. First telescopic mechanism, 311. First telescopic plate, 312. First connecting plate, 313. Second positioning block, 314. Second overlapping plate, 315. Second connecting groove, 316. Second positioning jack, 317. Third positioning jack, 32. Second telescopic mechanism, 321. Second telescopic plate, 322. Second connecting plate, 323. Third positioning block, 324. Third overlapping plate, 325. Third connecting groove, 326. Fourth positioning jack, 33. Third telescopic mechanism, 331. Sliding frame, 332. Threading plate, 34. Sampling frame mechanism, 341. Support rod, 342. Extrusion column, 343. Rotating motor, 344. Electric telescopic rod, 345. Upper pressing rod, 35. Positioning plate, 351. Upper inserting block, 352. Lower inserting block, 36. Electromagnetic block, 37. First magnetic plate, 38. Second magnetic plate, 39. Water through hole, 4. Split sampling tube, 41. Shell, 42. Pressure cover, 43. Telescopic column, 44. Pressing spring, 45. Top plate, 46. Connecting thread ring, 47. Magnetic ring, 48. Connecting ring, 49. Filter screen. Detailed implementation mode

[0016] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments. Parts of the technical features or connection relationships of the present invention that are not described in detail are all prior arts adopted.

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0018] As Figure 1-Figure 14 shown, a sampling device for detecting the water quality of natural water bodies provided by the present invention includes a fixed frame 1. The fixed frame 1 is arranged in a U shape. A tightening screw 11 is rotatably provided on the fixed frame 1. A fixed extrusion plate 13 is slidably provided inside the fixed frame 1. The tightening screw 11 penetrates through the fixed frame 1 and is rotatably connected to the fixed extrusion plate 13. Transition connecting plates 12 are symmetrically provided on one side of the fixed frame 1 away from the tightening screw 11. A floating main support frame assembly 2 is provided on one side of the fixed frame 1 away from the tightening screw 11. A light telescopic connecting frame assembly 3 is slidably provided inside the floating main support frame assembly 2. Split sampling tubes 4 are arranged in a circumferential array at the lower part of the light telescopic connecting frame assembly 3. Among them, the floating main support frame assembly 2 includes a floating plate 21, which is horizontally arranged. A movable groove 211 is penetrated on the floating plate 21. A first support plate 22 and a second support plate 23 are symmetrically arranged above the floating plate 21. The first support plate 22 and the second support plate 23 are vertically arranged above the movable groove 211. The first support plate 22 and the second support plate 23 are respectively penetrated with a weight-reducing through groove 29. The first support plate 22 is symmetrically provided with sliding grooves 28 on the side wall facing the fixed frame 1. The transition connecting plate 12 is slidably arranged in the sliding groove 28. A line-releasing mechanism 27 is connected between the first support plate 22 and the second support plate 23. The device is fixed on the inspection ship through the fixed frame 1 for easy movement. The floating plate 21 floats on the water surface. The fixed frame 1 is slidably connected to the first support plate 22 through the transition connecting plate 12, so that the floating of the inspection ship in the vertical direction does not affect the floating of the floating main support frame assembly 2.

[0019] A first connecting ring 24, a second connecting ring 25 and a third connecting ring 26 are sequentially connected between the first supporting plate 22 and the second supporting plate 23 from bottom to top, and a wire releasing mechanism 27 is arranged above the third connecting ring 26. The first connecting ring 24 is symmetrically provided with a first lap plate 241 and a first positioning hole 243 on the inner side of the side wall perpendicular to the first supporting plate 22, and the first positioning hole 243 is arranged below the first lap plate 241. A first connecting groove 242 is arranged on the upper wall of the first lap plate 241; the third connecting ring 26 is symmetrically provided with a first positioning block 261 on the inner side of the side wall perpendicular to the first supporting plate 22; The wire-releasing mechanism 27 includes a wire-releasing motor 271, which is arranged on the side wall of the first support plate 22 facing the fixed frame 1. A winding shaft 272 and a wire wheel shaft 273 are rotatably arranged between the first support plate 22 and the second support plate 23. The winding shaft 272 is connected to the output end of the wire-releasing motor 271. The wire wheel shaft 273 is arranged below the winding shaft 272. The wire wheel shaft 273 penetrates the first support plate 22 and is provided with a toggle wheel 275. A counter 276 is arranged on the side wall of the first support plate 22 facing the fixed frame 1. The counter 276 is externally connected to the output end of the wire-releasing motor 271. There is a paddle 277, and the protruding end of the paddle wheel 275 contacts the paddle 277. A pull rope 274 is wound around the winding shaft 272. The movable end of the pull rope 274 passes around the wire wheel shaft 273. A rubber sleeve is sleeved on the wire wheel shaft 273 to increase the friction between the pull rope 274 and the wire wheel shaft 273. When the pull rope 274 is released, the wire wheel shaft 273 is driven to rotate, thereby rotating the paddle wheel 275. The paddle wheel 275 paddles the paddle 277 to make the counter 276 record the number of rotations of the wire wheel shaft 273, so as to calculate the depth of the split sampling tube 4.

[0020] The light telescopic connecting frame assembly 3 includes a first telescopic mechanism 31, which is slidably disposed between the first support plate 22 and the second support plate 23, a second telescopic mechanism 32 is slidably disposed inside the first telescopic mechanism 31, a third telescopic mechanism 33 is slidably disposed inside the second telescopic mechanism 32, and a sampling frame mechanism 34 is disposed at the lower end of the third telescopic mechanism 33; The first telescopic mechanism 31 includes a first telescopic plate 311, which is symmetrically slidably arranged on the inner sides of the first connecting ring 24, the second connecting ring 25 and the third connecting ring 26. The first telescopic plate 311 is perpendicular to the first support plate 22 and the second support plate 23. The first connecting plates 312 are evenly connected between the first telescopic plates 311 in the vertical direction. Second positioning blocks 313 and second lap plates 314 are respectively arranged on opposite side walls of the first telescopic plate 311. The second positioning block 313 is arranged on the upper part of the inner wall of the first telescopic plate 311, and the second lap plate 314 is arranged on the lower part of the inner wall of the first telescopic plate 311. The upper wall of the second lap plate 314 is provided with a second connection groove 315. The first telescopic plate 311 is provided with a second positioning hole 316, and the opposite side wall of the first telescopic plate 311 is not provided with a third positioning hole 317. The second positioning hole 316 is provided above the second lap plate 314, and the third positioning hole 317 is provided below the second lap plate 314; the second telescopic mechanism 32 includes a second telescopic plate 321, and the second telescopic plate 321 is symmetrically slidably provided on the inner side of the first connecting plate 312. The second telescopic plate 321 is parallel to the first telescopic plate 311, and the second connecting plates 322 are evenly connected between the second telescopic plates 321 in the vertical direction. The opposite side walls of the second telescopic plate 321 are respectively provided with third positioning blocks 323. and a third lap plate 324, a third positioning block 323 is arranged on the upper part of the inner wall of the second telescopic plate 321, the third lap plate 324 is arranged on the lower part of the inner wall of the second telescopic plate 321, a third connecting groove 325 is arranged on the upper wall of the third lap plate 324, a fourth positioning socket 326 is penetrated through the second telescopic plate 321, and the fourth positioning socket 326 is arranged above the third lap plate 324; the third telescopic mechanism 33 includes a slide 331, the slide 331 is slidably arranged on the inner side of the second connecting plate 322, the slide 331 is opened at the upper end, a threading plate 332 is arranged horizontally inside the slide 331, and the four sides of the slide 331, the first telescopic plate 311 and the second telescopic plate 321 Water holes 39 are evenly distributed on the upper and lower surfaces; the first positioning block 261, the second positioning block 313 and the third positioning block 323 are arranged in an inverted J shape, and positioning plates 35 are respectively arranged on the side wall of the slide 331 facing the second telescopic plate 321, the side wall of the second telescopic plate 321 facing the first telescopic plate 311 and the side wall of the first telescopic plate 311 facing the first positioning block 261, an upper plug block 351 is arranged at the upper wall end of the positioning plate 35, and a lower plug block 352 is arranged at the lower wall end of the positioning plate 35, and an electromagnetic block 36 is arranged on the positioning plate 35 on the slide 331 and the second telescopic plate 321; the movable end of the pull rope 274 passes through the threading plate 332 and is connected to the lower end of the slide 331; In the initial state, the first positioning block 261, the second positioning block 313 and the third positioning block 323 are in the same horizontal state, the upper inserting block 351 on the slide 331 is engaged in the third positioning block 323, the upper inserting block 351 on the second telescopic plate 321 is engaged in the second positioning block 313, and the upper inserting block 351 on the first telescopic plate 311 is engaged in the first positioning block 261; In the initial state, the fourth positioning hole 326 corresponds to the horizontal position of the third positioning hole 317, the second positioning hole 316 corresponds to the horizontal position of the first positioning hole 243, the first magnetic plate 37 is slidably provided in the first positioning hole 243 and the second positioning hole 316, and the second magnetic plate 38 is slidably provided in the third positioning hole 317 and the fourth positioning hole 326; When the slide 331 slides to the lower end of the second telescopic plate 321, the lower insert block 352 on the slide 331 is engaged in the third connecting groove 325. At this time, the electromagnetic block 36 on the slide 331 is opposite to the second magnetic plate 38. The electromagnetic block 36 on the slide 331 is energized to generate magnetism, and its magnetic pole is arranged at an opposite pole to the magnetic pole of the second magnetic plate 38. The electromagnetic block 36 on the slide 331 absorbs the second magnetic plate 38, so that the second magnetic plate 38 is separated from the third positioning hole 317, thereby releasing the second telescopic plate 321 from the first telescopic plate 321. The second retractable plate 321 is positioned between the retractable plates 311, and the second magnetic plate 38 in the fourth positioning socket 326 is adsorbed and fixed with the electromagnetic block 36, so that the second retractable plate 321 moves with the slide 331; when the second retractable plate 321 slides to the lower end of the first retractable plate 311, the lower plug block 352 on the second retractable plate 321 is engaged in the second connecting groove 315. At this time, the electromagnetic block 36 on the second retractable plate 321 is opposite to the first magnetic plate 37, and the electromagnetic block 36 on the second retractable plate 321 is energized to generate magnetism, and its magnetic pole The first magnetic plate 37 is arranged with an opposite pole to the magnetic pole of the first magnetic plate 37. The electromagnetic block 36 on the second telescopic plate 321 absorbs the first magnetic plate 37, so that the first magnetic plate 37 is separated from the first positioning socket 243, thereby releasing the positioning between the first telescopic plate 311 and the first connecting ring 24. The first magnetic plate 37 in the second positioning socket 316 is fixed by the electromagnetic block 36, so that the first telescopic plate 311 moves with the second telescopic plate 321 and the slide 331. When the upper end of the first telescopic plate 311 slides to the first connecting ring 24, the lower insert block 352 on the first telescopic plate 311 is engaged in the first connecting groove 242. In the process of the slide 331 driving the split sampling tube 4 to move downward, the transition connection of the hard structure is used to resist the impact of irregular water flow in the natural water body, so that the downward movement distance of the split sampling tube 4 is calculated, and the technical effect of collecting water samples in a specified area or depth is achieved, and the length limit of the traditional long rod is broken, so that water samples in deeper waters can be collected, and continuous sampling in different areas can be performed at the same time, and the sampling efficiency is high.

[0021] The sampling rack mechanism 34 includes a support rod 341, a rotating motor 343 and an electric telescopic rod 344. The support rods 341 are arranged in a horizontal circular array at the lower end of the slide 331. The end of the support rod 341 away from the slide 331 is vertically provided with a squeezing column 342. The outer wall of the squeezing column 342 is provided with a thread. The rotating motor 343 is arranged at the lower end center of the slide 331. The electric telescopic rod 344 is coaxially arranged at the output end of the rotating motor 343. The output end of the electric telescopic rod 344 is horizontally provided with an upper pressure rod 345, and the upper pressure rod 345 extends to the bottom of the squeezing column 342. The split sampling tube 4 includes a shell 41 and a pressure cover 42, which is meshed and connected with the shell 41. The pressure cover 42 is a through structure. A telescopic column 43 is provided at the inner center of the shell 41, and a compression spring 44 is provided in the telescopic column 43. A top plate 45 is provided at the upper end of the telescopic column 43. The top plate 45 is movably arranged in the shell 41 and the pressure cover 42. A connecting thread ring 46 is provided on the upper part of the top plate 45. The connecting thread ring 46 is arranged on the inner side of the pressure cover 42, and the connecting thread ring 46 is meshed and connected with the lower end of the extrusion column 342; a magnetic ring 47 is provided on the inner wall of the shell 41, and a connecting ring 48 is magnetically attached to the magnetic ring 47. A filter screen 49 is connected to the inner side of the connecting ring 48, and the filter screen 49 is slidably sleeved on the outer side of the telescopic column 43. An elastic rope is connected to the central opening of the filter screen 49.

[0022] Working principle and workflow: During specific use, the staff will install the clean filter 49 into the shell 41, stretch the elastic rope, put the filter 49 over the top plate 45 and onto the telescopic column 43, and press the connecting ring 48 to make it attracted and fixed with the magnetic ring 47, and then tighten the pressure cover 42 and the shell 41, the pressure cover 42 presses the top plate 45, and the compression spring 44 is in a compressed state, so that the top plate 45 and the pressure cover 42 fit tightly to avoid air leakage in the shell 41, and then the connecting threaded ring 46 on the installed split sampling tube 4 is meshed and connected with the extrusion column 342 in turn, and one of the split sampling tubes 4 is above the end of the upper pressure rod 345.

[0023] After installing the split sampling tube 4, take the inspection ship to the waters to be inspected. After arriving, place the device in the water. The floating plate 21 makes the entire device float on the water under the action of buoyancy. At this time, the lower wall of the split sampling tube 4 and the lower wall of the floating plate 21 are in the same plane. The fixing frame 1 is clamped on the edge of the inspection ship, and the fastening screw 11 is screwed. Under the clamping of the fixed extrusion plate 13 and the fixing frame 1, the device is fixed on the hull, which is convenient for the inspection ship to drive the device to move. During the movement, the fixing frame 1 is slidably connected to the first support plate 22 through the transition connecting plate 12, so that the floating of the inspection ship in the vertical direction does not affect the floating of the floating main support frame assembly 2, thereby avoiding the calculation of the sampling depth being affected by the inspection ship.

[0024] In the initial state, the floating plate 21 floats on the water surface, the split sampling tube 4 is on the water surface, the pull rope 274 carries the weight of the third telescopic mechanism 33, the sampling rack mechanism 34 and the multiple split sampling tubes 4, the first positioning block 261, the second positioning block 313 and the third positioning block 323 are in the same horizontal state, the upper plug block 351 on the slide 331 is engaged in the third positioning block 323, the upper plug block 351 on the second telescopic plate 321 is engaged in the second positioning block 313, the upper plug block 351 on the first telescopic plate 311 is engaged in the first positioning block 261, the first magnetic plate 37 is in the first positioning socket 243 and the second positioning socket 316, so as to locate the position between the first telescopic plate 311 and the first connecting ring 24, and the second magnetic plate 38 is in the third positioning socket 317 and the fourth positioning socket 326, so as to locate the position between the first telescopic plate 311 and the second telescopic plate 321; When sampling, the pay-off motor 271 is started, the winding shaft 272 rotates to pay off the line, the drawstring 274 is extended, and the drawstring 274 is pulled under the gravity of the third telescopic mechanism 33, the sampling frame mechanism 34 and the multi-component split sampling tube 4, and the drawstring 274 is always in a taut state. A rubber sleeve is sleeved on the wire wheel shaft 273 to increase the friction between the drawstring 274 and the drawstring 274. When paying off the line, the drawstring 274 drives the wire wheel shaft 273 to rotate, thereby rotating the toggle wheel 275. The protruding end of the toggle wheel 275 toggles the paddle 277 to make the counter 276 record the wire wheel shaft 27 3, in the initial state, the split sampling tube 4 is at the water surface, and the length of the extension of the pull rope 274 is equivalent to the depth of the split sampling tube 4 entering the water body. The circumference of the wire wheel shaft 273 is convenient for calculating the depth of the split sampling tube 4, and the sampling depth of the water body is accurately controlled; the sampling frame mechanism 34 drives the split sampling tube 4 to go deep into the water, and the compressed compression spring 44 provides a strong thrust for the top plate 45 to offset the buoyancy effect of the shell 41 when entering the water body, so that the top plate 45 and the pressure cover 42 are tightly pressed together, so that the inside of the shell 41 is in a closed state; As the split sampling tube 4 penetrates deeper into the water body, the slide 331 slides between the second connecting plates 322, and the second connecting plates 322 and the third lap plates 324 jointly limit the sliding direction of the slide 331. Under the support of the slide 331, the sampling rack mechanism 34 will not deviate from the predetermined position in the vertical direction even if it is impacted by the irregular water flow of the natural water body, thereby improving the accuracy of the water body sampling position; when the positioning plate 35 on the slide 331 slides to the lower end of the second telescopic plate 321, the lower insert block 352 on the slide 331 is engaged in the third connecting groove 325. At this time, the electromagnetic block 36 on the slide 331 is opposite to the second magnetic plate 38, and the slide 33 The electromagnetic block 36 on the slide 331 is energized to generate magnetism, and its magnetic pole is arranged at an opposite pole to the magnetic pole of the second magnetic plate 38. The electromagnetic block 36 on the slide 331 absorbs the second magnetic plate 38, so that the second magnetic plate 38 slides out of the third positioning hole 317, thereby releasing the positioning between the second telescopic plate 321 and the first telescopic plate 311. The second magnetic plate 38 in the fourth positioning hole 326 is adsorbed and fixed to the electromagnetic block 36, so that the second telescopic plate 321 slides between the first connecting plate 312 and the second lap plate 314 and moves with the slide 331. Similarly, when the positioning plate 35 on the second telescopic plate 321 slides to the lower end of the first telescopic plate 311, the second telescopic plate 321 is released. The lower insert block 352 on the retractable plate 321 is engaged in the second connecting groove 315. At this time, the electromagnetic block 36 on the second retractable plate 321 is opposite to the first magnetic plate 37. The electromagnetic block 36 on the second retractable plate 321 is energized to generate magnetism, and its magnetic pole is arranged at an opposite pole to the magnetic pole of the first magnetic plate 37. The electromagnetic block 36 on the second retractable plate 321 absorbs the first magnetic plate 37, so that the first magnetic plate 37 is separated from the first positioning socket 243, thereby releasing the positioning between the first retractable plate 311 and the first connecting ring 24. The first magnetic plate 37 in the second positioning socket 316 is absorbed and fixed by the electromagnetic block 36, so that the first retractable plate 311 is in the first connecting ring 24 It slides and moves with the second telescopic plate 321 and the slide 331; when the upper end of the first telescopic plate 311 slides to the first connecting ring 24, the lower plug block 352 on the first telescopic plate 311 is engaged in the first connecting groove 242; in the process of the slide 331 driving the split sampling tube 4 to move downward, the transition connection of the hard structure is used to resist the impact of irregular water flow in natural water bodies, which is convenient for accurately calculating the downward movement distance of the split sampling tube 4, and realizes the technical effect of collecting water samples in a specified area or depth, and breaks the length limitation of the traditional long pole, can collect water samples in deeper waters, and can perform continuous sampling in different areas at the same time, with high sampling efficiency.

[0025] When the position of the split sampling tube 4 reaches the specified depth, the pay-off motor 271 can be stopped at any time, and the pull rope 274 bears the entire weight of the light telescopic connecting frame assembly 3. At this time, the electric telescopic column 43 is started, the upper pressure rod 345 contracts and extends once, the upper pressure rod 345 moves upward, and a shell 41 above the upper pressure rod 345 is pushed upward. The squeezing column 342 limits the position of the top plate 45, and the compression spring 44 is compressed to separate the pressure cover 42 from the top plate 45. Due to the pressure in the water body, the water at the specified depth flows into the shell 4 from between the pressure cover 42 and the top plate 45. 1, the solid pollutants are filtered in the space above the filter screen 49 when passing through the filter screen 49, and then the upper pressure rod 345 moves down and no longer presses the shell 41. Under the elastic action of the pressing spring 44, the shell 41 moves down again, so that the top plate 45 and the pressure cover 42 are tightly fitted again, and the water sampling of the split sampling tube 4 is completed; then the rotating motor 343 is started, and the electric telescopic rod 344 and the upper pressure rod 345 are rotated as a whole at a certain angle, so that the upper pressure rod 345 is rotated to the bottom of the next split sampling tube 4, and then moved to the next sampling point for water sampling; When moving to the next sampling point, based on the current depth of the split sampling tube 4, the wire-releasing motor 271 can be used to release the wire to extend the pull rope 274 to deepen the sampling depth, or the wire-releasing motor 271 can be used to reel in the pull rope 274 to reduce the sampling depth, thereby achieving the technical effect of continuous sampling of different areas, convenient operation, and high sampling efficiency; When the pull rope 274 is rolled up, when the first telescopic plate 311 slides back to the initial position, the upper plug block 351 on the first telescopic plate 311 is again engaged with the first positioning block 261. At this time, since the first magnetic plate 37 blocks the positioning plate 35 on the second telescopic plate 321, when the positioning plate 35 feels pressure, the electromagnetic block 36 on the second telescopic plate 321 is reversely energized. At this time, its magnetic pole is set at the same pole as the magnetic pole of the first magnetic plate 37, and a repulsive force is generated between the electromagnetic block 36 and the first magnetic plate 37, so that the first magnetic plate 37 moves away from the electromagnetic block 36 and slides into the first positioning hole 243. The first magnetic plate 37 no longer blocks the positioning plate 35 on the second telescopic plate 321, and the pull rope 27 4 can continue to be rolled up. Similarly, when the second telescopic plate 321 slides back to the initial position, the upper insert block 351 on the second telescopic plate 321 is again engaged in the second positioning block 313. At this time, since the second magnetic plate 38 blocks the positioning plate 35 on the slide 331, when the positioning plate 35 feels the pressure, the electromagnetic block 36 on the slide 331 is reversely energized. At this time, its magnetic pole is set to the same pole as the magnetic pole of the second magnetic plate 38, and a repulsive force is generated between the electromagnetic block 36 and the second magnetic plate 38, so that the second magnetic plate 38 is away from the electromagnetic block 36 and slides into the third positioning plug hole 317. The slide 331 can continue to move up until the slide 331 slides back to the initial position, and the water sampling work is completed.

[0026] Finally, it is only necessary to retrieve the device from the water body, and respectively twist the separating connecting threaded ring 46 and the squeezing column 342 to remove the split sampling tube 4. At this time, the split sampling tube 4 is still in a closed state, which is convenient for transportation. When water body testing is required, unscrew the pressure cover 42, and the elasticity of the compression spring 44 lifts the top plate 45, increasing the distance between the top plate 45 and the shell 41, so as to facilitate the removal of the water sample in the shell 41. First, pour out the water sample above the filter 49, collect other solid pollutants filtered out by the filter 49 and test them separately, then separate the connecting ring 48 and the magnetic ring 47, take out the filter 49 and pour out the remaining water sample in the shell 41 for testing to form a comparative water sample.

[0027] It is worth mentioning that in the present device, the sampling rack mechanism 34 includes a rotating motor 343 and an electric telescopic rod 344. The rotating motor 343 is a stepping motor, and its own weight is sufficient to overcome the buoyancy in the water so that the split sampling tube 4 can fall freely. There is no need to set a counterweight block separately. If the weight of the sampling rack mechanism 34 is not enough to overcome the buoyancy in the water in actual use, a counterweight block can be set at the output end of the electric telescopic rod 344. This is a prior art and will not be elaborated here.

[0028] The above is the overall workflow of the present invention, and you can repeat this step next time you use it.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A sampling device for detecting the water quality of natural water bodies, including a fixing frame (1), the fixing frame (1) is arranged in a U shape, and is characterized in that: It also comprises a floating main support frame assembly (2), a light telescopic connecting frame assembly (3) and a split sampling tube (4), wherein the floating main support frame assembly (2) is arranged on one side of the fixed frame (1), the light telescopic connecting frame assembly (3) is slidably arranged on the inner side of the floating main support frame assembly (2), and the split sampling tube (4) is arranged in a circular array at the bottom of the light telescopic connecting frame assembly (3); The floating main support frame assembly (2) comprises a floating plate (21), a first support plate (22), a second support plate (23) and a line-releasing mechanism (27); the floating plate (21) is arranged horizontally; a movable groove (211) is provided through the floating plate (21); the first support plate (22) and the second support plate (23) are symmetrically arranged above the floating plate (21); the first support plate (22) and the second support plate (23) are vertically arranged above the movable groove (211); the first support plate (22) is slidably connected to the fixed frame (1); and the line-releasing mechanism (27) is connected between the first support plate (22) and the second support plate (23); The light telescopic connecting frame assembly (3) comprises a first telescopic mechanism (31), a second telescopic mechanism (32), a third telescopic mechanism (33) and a sampling frame mechanism (34); the first telescopic mechanism (31) is slidably arranged between a first support plate (22) and a second support plate (23); the second telescopic mechanism (32) is slidably arranged inside the first telescopic mechanism (31); the third telescopic mechanism (33) is slidably arranged inside the second telescopic mechanism (32); and the sampling frame mechanism (34) is arranged at the lower end of the third telescopic mechanism (33).

2. A sampling device for natural water quality detection according to claim 1, characterized in that: A first connecting ring (24), a second connecting ring (25) and a third connecting ring (26) are sequentially connected between the first supporting plate (22) and the second supporting plate (23) from bottom to top, and the wire-releasing mechanism (27) is arranged above the third connecting ring (26); the first connecting ring (24) is symmetrically provided with a first lap plate (241) and a first positioning hole (243) on the inner side of a side wall of the first supporting plate (22), the first positioning hole (243) is arranged below the first lap plate (241), and a first connecting groove (242) is arranged on the upper wall of the first lap plate (241); the third connecting ring (26) is symmetrically provided with a first positioning block (261) on the inner side of a side wall of the first supporting plate (22).

3. A sampling device for natural water quality detection according to claim 2, characterized in that: The first telescopic mechanism (31) comprises a first telescopic plate (311), a first connecting plate (312), a second positioning block (313) and a second overlapping plate (314); the first telescopic plate (311) is symmetrically slidably arranged on the inner sides of the first connecting ring (24), the second connecting ring (25) and the third connecting ring (26); the first telescopic plate (311) is perpendicular to the first support plate (22) and the second support plate (23); the first connecting plate (312) is evenly connected between the first telescopic plates (311) in the vertical direction; the second positioning block (313) and the second overlapping plate (314) are respectively arranged on the first telescopic plate (311); 1), a second positioning block (313) is arranged on the upper part of the inner wall of the first telescopic plate (311), a second lap plate (314) is arranged on the lower part of the inner wall of the first telescopic plate (311), a second connecting groove (315) is arranged on the upper wall of the second lap plate (314), a second positioning hole (316) is penetrated through the first telescopic plate (311), a third positioning hole (317) is not penetrated through the opposite side wall of the first telescopic plate (311), the second positioning hole (316) is arranged above the second lap plate (314), and the third positioning hole (317) is arranged below the second lap plate (314).

4. A sampling device for natural water quality detection according to claim 3, characterized in that: The second telescopic mechanism (32) comprises a second telescopic plate (321), a second connecting plate (322), a third positioning block (323) and a third overlapping plate (324); the second telescopic plate (321) is symmetrically slidably arranged on the inner side of the first connecting plate (312); the second telescopic plate (321) is parallel to the first telescopic plate (311); the second connecting plate (322) is evenly connected between the second telescopic plates (321) in the vertical direction; the third positioning block (323) and the third overlapping plate (324) are connected to each other. The connecting plates (324) are respectively arranged on opposite side walls of the second telescopic plate (321), the third positioning block (323) is arranged on the upper part of the inner wall of the second telescopic plate (321), the third lap plate (324) is arranged on the lower part of the inner wall of the second telescopic plate (321), the upper wall of the third lap plate (324) is provided with a third connecting groove (325), the second telescopic plate (321) is penetrated by a fourth positioning plug hole (326), and the fourth positioning plug hole (326) is arranged above the third lap plate (324); The third telescopic mechanism (33) comprises a slide (331) and a threading plate (332); the slide (331) is slidably arranged on the inner side of the second connecting plate (322); the slide (331) is opened at the upper end; the threading plate (332) is horizontally arranged inside the slide (331); and water holes (39) are evenly distributed and penetrated on four sides of the slide (331), the first telescopic plate (311) and the second telescopic plate (321).

5. A sampling device for natural water quality detection according to claim 4, characterized in that: The first positioning block (261), the second positioning block (313) and the third positioning block (323) are arranged in an inverted J shape; positioning plates (35) are respectively provided on the side wall of the slide (331) facing the second telescopic plate (321), on the side wall of the second telescopic plate (321) facing the first telescopic plate (311) and on the side wall of the first telescopic plate (311) facing the first positioning block (261); an upper insert block (351) is provided at the upper wall end of the positioning plate (35), and a lower insert block (352) is provided at the lower wall end of the positioning plate (35); and an electromagnetic block (36) is provided on the positioning plates (35) on the slide (331) and the second telescopic plate (321); In the initial state, the first positioning block (261), the second positioning block (313) and the third positioning block (323) are in the same horizontal state, the upper insert block (351) on the slide (331) is engaged in the third positioning block (323), the upper insert block (351) on the second telescopic plate (321) is engaged in the second positioning block (313), and the upper insert block (351) on the first telescopic plate (311) is engaged in the first positioning block (261); When the slide (331) slides to the lower end of the second telescopic plate (321), the lower insert block (352) on the slide (331) is engaged in the third connection groove (325); when the second telescopic plate (321) slides to the lower end of the first telescopic plate (311), the lower insert block (352) on the second telescopic plate (321) is engaged in the second connection groove (315); when the upper end of the first telescopic plate (311) slides to the first connecting ring (24), the lower insert block (352) on the first telescopic plate (311) is engaged in the first connection groove (242).

6. A sampling device for natural water quality detection according to claim 5, characterized in that: In the initial state, the fourth positioning hole (326) corresponds to the horizontal position of the third positioning hole (317), the second positioning hole (316) corresponds to the horizontal position of the first positioning hole (243), a first magnetic plate (37) is slidably provided in the first positioning hole (243) and the second positioning hole (316), and a second magnetic plate (38) is slidably provided in the third positioning hole (317) and the fourth positioning hole (326).

7. A sampling device for natural water quality detection according to claim 6, characterized in that: The sampling rack mechanism (34) comprises a support rod (341), a rotating motor (343) and an electric telescopic rod (344); the support rods (341) are arranged in a horizontal circular array at the lower end of the slide (331); an extrusion column (342) is vertically provided at the end of the support rod (341) away from the slide (331); the outer wall of the extrusion column (342) is provided with a thread; the rotating motor (343) is arranged at the center of the lower end of the slide (331); the electric telescopic rod (344) is coaxially arranged at the output end of the rotating motor (343); and an upper pressure rod (345) is horizontally provided at the output end of the electric telescopic rod (344).

8. A sampling device for natural water quality detection according to claim 7, characterized in that: The split sampling tube (4) comprises a shell (41), a gland (42), a top plate (45) and a filter (49); the gland (42) is meshedly connected to the shell (41); the gland (42) is a through structure; a telescopic column (43) is provided at the center of the shell (41); a compression spring (44) is provided in the telescopic column (43); the top plate (45) is provided at the upper end of the telescopic column (43); the top plate (45) is movably provided in the shell (41) and the gland (42); the top plate (45) is provided at the bottom of the shell (41) and the gland (42); 5) is provided with a connecting thread ring (46) at the upper part, the connecting thread ring (46) is provided on the inner side of the pressure cover (42), and the connecting thread ring (46) is meshedly connected with the lower end of the extrusion column (342); a magnetic ring (47) is provided on the inner wall of the shell (41), and a connecting ring (48) is magnetically attached to the magnetic ring (47), the filter screen (49) is connected to the inner side of the connecting ring (48), the filter screen (49) is slidably sleeved on the outer side of the telescopic column (43), and an elastic rope is connected to the center opening of the filter screen (49).

9. A sampling device for natural water quality detection according to claim 8, characterized in that: The wire-releasing mechanism (27) comprises a wire-releasing motor (271), a winding shaft (272), a wire wheel shaft (273) and a pull rope (274); the wire-releasing motor (271) is arranged on a side wall of the first support plate (22) facing the fixed frame (1); the winding shaft (272) and the wire wheel shaft (273) are rotatably arranged between the first support plate (22) and the second support plate (23); the winding shaft (272) is connected to the output end of the wire-releasing motor (271); the wire wheel shaft (273) is arranged below the winding shaft (272) The wire wheel shaft (273) passes through the first support plate (22) and is provided with a toggle wheel (275). A counter (276) is provided on the side wall of the first support plate (22) facing the fixed frame (1). The counter (276) is externally connected with a paddle (277). The protruding end of the toggle wheel (275) contacts the paddle (277). The pull rope (274) is wound around the winding shaft (272). The movable end of the pull rope (274) passes around the wire wheel shaft (273) and passes through the threading plate (332) to be connected to the lower end of the slide frame (331).

10. A sampling device for natural water quality detection according to claim 9, characterized in that: The first support plate (22) and the second support plate (23) are respectively penetrated by weight-reducing through grooves (29); a sliding groove (28) is symmetrically provided on the side wall of the first support plate (22) facing the fixed frame (1); a fastening screw (11) is rotatably provided on the fixed frame (1); a fixed extrusion plate (13) is slidably provided inside the fixed frame (1); the fastening screw (11) penetrates the fixed frame (1) and is rotatably connected to the fixed extrusion plate (13); a transition connecting plate (12) is symmetrically provided on the side of the fixed frame (1) away from the fastening screw (11); the transition connecting plate (12) is slidably provided in the sliding groove (28).

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