Surface water sample collection device for water pollution detection

Abstract

The invention relates to the field of surface water sample collection, in particular to a surface water sample collection device for water pollution detection, which comprises a water pumping component, a round collection box with an open bottom, a micro water pump arranged on the outer side of the collection box, and a water outlet pipe of the micro water pump extending into the collection box, a water inlet pipe of the micro water pump is fixedly connected with a filter cartridge; the container replacing part comprises a circular ring which is connected into the collecting box in a sealed and sliding manner, a plurality of pipelines with valves are arranged on the circular ring, a storage part for storing a water sample is arranged on the circular ring, a cylinder penetrates through and is connected to the collecting box in a sliding manner, a guide part matched with the circular ring is arranged on the cylinder, and the guide part is connected with the circular ring in a sliding manner. The cylinder is provided with a supporting part for supporting the collection box, and the lower side of the cylinder is provided with a connecting column; according to the device, a plurality of water samples are stored, the storage cylinder can be conveniently replaced, and meanwhile, the interference of the previous water sample on the water sample collection can be avoided.

Description

Technical Field

[0001] The invention relates to the field of surface water sample collection, in particular to a surface water sample collection device for water pollution detection. Background Art

[0002] When conducting water pollution detection, water samples need to be collected. In the process of collecting surface water samples, the common device is a water sample collector, which draws water samples by negative pressure pumping or water pumping. When using it, just extend one end of the pipe into the water sample layer, turn on the machine (water pump or negative pressure pump), and the water sample can be drawn into the container.

[0003] During use, existing containers are generally sample bottles or sample tanks. Although this storage method can store water samples, in actual use, due to the randomness and one-sidedness of an experiment, it is necessary to perform multi-point sampling in different places and different water layers in the same area. At this time, it is necessary to prepare multiple sample bottles and sample tanks, which makes it inconvenient to carry and the bottles are prone to collision and damage. In addition, the sample bottles need to be constantly replaced during use, which makes the operation cumbersome. Summary of the Invention

[0004] In view of the fact that the end of the water sample collection device mentioned above or in the prior art is stored as a sample storage bottle or a sample storage tank, when multiple water samples need to be collected, multiple sample storage bottles and sample storage tanks need to be prepared, which makes it inconvenient to carry and the bottles are prone to collision and damage. In addition, the sample storage bottles need to be constantly replaced during sampling, which makes the operation cumbersome. Therefore, the present invention is proposed.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: it includes a water pumping component, including a circular collection box with an open bottom, a micro water pump is provided on the outside of the collection box, the outlet pipe of the micro water pump extends into the collection box, and a filter cartridge is fixedly connected to the water inlet pipe of the micro water pump; a container replacement component includes a circular ring that is sealingly and slidably connected to the collection box, the circular ring is provided with a plurality of pipes with valves, the circular ring is provided with a storage part for storing water samples, a cylinder passes through and slidably connected to the collection box, the cylinder is provided with a guide part that cooperates with the circular ring, the cylinder is provided with a support part for supporting the collection box, a connecting column is provided on the lower side of the cylinder, and the connecting column is provided with a guide part and a one-way part for driving the circular ring to rotate; a pipeline emptying component includes a blocking part arranged in the pipeline, the cylinder is provided with a pushing part that provides power to the blocking part, and the pipeline is provided with an exhaust part for extending the blocking time.

[0006] As a preferred embodiment of the surface water sample collection device for water pollution detection of the present invention, the storage portion includes a water storage cylinder fixedly connected to a circular ring, a water outlet penetrating the circular ring is provided at the bottom of the water storage cylinder, a leak-proof ring is interference-fitted at the upper end of the water storage cylinder, an elastic plug is fixedly connected to the leak-proof ring, and an opening is provided on the elastic plug, the diameter of the opening decreases from top to bottom.

[0007] As a preferred solution of the surface water sample collection device for water pollution detection of the present invention, the guide portion includes a support ring with an L-shaped cross-section fixedly connected to a circular ring, an annular groove is provided on the support ring, and a first disc that cooperates with the annular groove is fixedly connected to the cylinder.

[0008] As a preferred solution of the surface water sample collection device for water pollution detection of the present invention, the support part includes a receiving groove arranged in a cylinder, a second disc is elastically connected to the receiving groove through a first spring, a stop ring that cooperates with the second disc is fixedly connected to the receiving groove, the second disc is fixedly connected to the connecting column, a support disc is fixedly connected to the bottom of the connecting column, and a distance is provided between the support disc and the collection box.

[0009] As a preferred solution of the surface water sample collection device for water pollution detection of the present invention, the guide part includes a lever fixedly connected to the connecting column, a plurality of first vertical grooves are provided on the inner wall of the circular ring, an arc groove is connected to the first vertical groove, a second vertical groove is connected to the arc groove, and a limiting ring that cooperates with the circular ring is fixedly connected to the inner wall of the collection box.

[0010] As a preferred solution of the surface water sample collection device for water pollution detection of the present invention, the first vertical groove, the second vertical groove and the arc groove form a group, and the first vertical groove and the second vertical groove are connected between two adjacent groups.

[0011] As a preferred solution of the surface water sample collection device for water pollution detection of the present invention, the one-way portion includes an outward expansion groove arranged in the arc groove, a transmission shaft is rotatably connected in the outward expansion groove, a stopper is fixedly connected to the transmission shaft, a torsion spring is provided on the transmission shaft, and the upper end surface of the stopper is against the inner wall of the outward expansion groove.

[0012] As a preferred embodiment of the surface water sample collection device for water pollution detection of the present invention, the sealing portion includes an extension tube fixedly connected to the pipeline, a sealing plug is slidably connected inside the extension tube, and the extension tube and the pipeline are combined into an inverted T shape.

[0013] As a preferred solution of the surface water sample collection device for water pollution detection of the present invention, the pushing part includes a mounting block fixedly connected to a cylinder, the mounting block is provided with a first arc edge and a second arc edge, the mounting block is located between two water storage cylinders, the sealing plug is fixedly connected to a movable plate that cooperates with the mounting block, the movable plate is provided with two oblique edges, the support plate is fixedly connected to an edge, and the edge is provided with multiple drainage outlets.

[0014] As a preferred solution of the surface water sample collection device for water pollution detection of the present invention, the exhaust part includes an air storage cylinder fixedly connected to a pipeline and opened at one end, a piston is sealingly and slidingly connected inside the air storage cylinder, an L-shaped plate fixed to the piston is fixedly connected to the movable plate, the piston is elastically connected to the inner wall of the air storage cylinder through a second spring, the outer end of the air storage cylinder is connected to an air inlet pipe and an air outlet pipe, the diameter of the air inlet pipe is much smaller than the diameter of the air outlet pipe, and a one-way valve is provided in both the air inlet pipe and the air outlet pipe, the air inlet pipe extends to the outside of the pipeline and is threadedly connected to a sealing cylinder, a plurality of air holes are provided on the sealing cylinder, and the inner wall of the sealing cylinder is provided with a sealing plug that cooperates with the air inlet pipe.

[0015] Beneficial effects of the surface water sample collection device for water pollution detection of the present invention:

[0016] 1. By setting up container replacement components, multiple storage cylinders are set up in the collection box, which can store multiple water samples. When replacing the storage cylinder, you only need to press the cylinder to make the ring drop and then replace the storage cylinder through transmission. There is no need to manually replace the sample bottle, and there is no need to carry multiple sample bottles, which is easy to operate.

[0017] 2. By setting up the storage part, when the water outlet pipe does not cooperate with the storage cylinder, the elastic plug and the leak-proof ring can automatically seal the storage cylinder when the storage cylinder is replaced, avoiding leakage of water samples. Moreover, due to the automatic sealing, there is no need for manual sealing, which is more labor-saving to use.

[0018] 3. By setting up the pipeline emptying component, after the storage cylinder is replaced, the bottom of the storage cylinder can be automatically opened for a period of time, so that the water sample collected last time in the outlet pipe can be discharged first, thereby avoiding the last collected water sample from affecting the current water sample collection.

[0019] 4. By setting up the sealing cylinder, air vents and sealing plugs, the opening time of the bottom of the storage cylinder can be controlled. Therefore, when the sampling time interval is long, the sealing plug can be prevented from resetting first, ensuring that the previous water sample in the outlet pipe can be discharged first each time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic external structure diagram of a surface water sample collection device for water pollution detection.

[0022] Figure 2 It is a schematic sectional structure diagram of a surface water sample collection device for water pollution detection.

[0023] Figure 3 It is Figure 2 a schematic enlarged structure diagram of part A of

[0024] Figure 4 It is a schematic sectional structure diagram of the storage part of a surface water sample collection device for water pollution detection.

[0025] Figure 5 It is a schematic sectional structure diagram of the circular ring of a surface water sample collection device for water pollution detection.

[0026] Figure 6 It is Figure 5 a schematic enlarged structure diagram of part B of

[0027] Figure 7 It is a front view of the one-way part of a surface water sample collection device for water pollution detection.

[0028] Figure 8 It is a schematic sectional structure diagram of the pushing part of a surface water sample collection device for water pollution detection.

[0029] Fig. 9 It is a schematic sectional structure diagram of the exhaust part of a surface water sample collection device for water pollution detection.

[0030] Fig.10 It is Fig. 9 a schematic enlarged structure diagram of part C of

[0031] In the figure: 10, collection box; 11, micro water pump; 12, water outlet pipe; 13, water inlet pipe; 14, filter cartridge; 20, ring; 21, pipe; 22, storage unit; 221, water storage cylinder; 222, leak-proof ring; 223, elastic plug; 224, opening; 23, cylinder; 24, guide unit; 241, support ring; 242, first disc; 25, connecting column; 26, support unit; 261, receiving groove; 262, first spring; 263, second disc; 264, support disc; 27, guide unit; 271, lever; 272, first vertical slot; 273, Arc groove; 274, second vertical groove; 28, one-way portion; 281, outward expansion groove; 282, stopper; 283, torsion spring; 30, blocking portion; 301, extension tube; 302, sealing plug; 31, pushing portion; 311, mounting block; 312, first arc edge; 313, second arc edge; 314, movable plate; 315, bevel edge; 316, drain outlet; 32, exhaust portion; 321, air storage cylinder; 322, piston; 323, L-shaped plate; 324, second spring; 325, air inlet pipe; 326, sealing cylinder; 327, air vent; 328, sealing plug. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] Example 1, with reference to Figures 1 to 9 , which is the first embodiment of the present invention, provides a surface water sample collection device for water pollution detection, which can store multiple water samples and facilitate the replacement of storage cartridges. The device includes a pumping component, including a circular collection box 10 with an open bottom, a micro water pump 11 is provided on the outside of the collection box 10, an outlet pipe 12 of the micro water pump 11 extends into the collection box 10, and a filter cartridge 14 is fixedly connected to the water inlet pipe 13 of the micro water pump 11; a container replacement component, including a ring 20 that is sealingly and slidably connected to the collection box 10, and a plurality of pipes 21 with valves are provided on the ring 20. A storage portion 22 for storing water samples is provided on the ring 20, a cylinder 23 is passed through and slidably connected to the collection box 10, a guide portion 24 is provided on the cylinder 23 for cooperating with the ring 20, a support portion 26 for supporting the collection box 10 is provided on the cylinder 23, a connecting column 25 is provided on the lower side of the cylinder 23, and a guide portion 27 and a one-way portion 28 for driving the ring 20 to rotate are provided on the connecting column 25; the pipeline venting component includes a sealing portion 30 arranged in the pipeline 21, a pushing portion 31 for providing power to the sealing portion 30 is provided on the cylinder 23, and an exhaust portion 32 for extending the time of the sealing portion 30 is provided on the pipeline 21.

[0034] Specifically, a tray and a bracket can also be provided on the lower side of the collection box 10 to support the collection box 10. Here, the micro water pump 11 can be powered by a DC power supply so that a mobile power supply can supply power to the micro water pump 11. This is prior art and will not be elaborated here. A pressure plate is also provided at the upper end of the cylinder 23 to extrude the cylinder 23.

[0035] Furthermore, the storage part 22 includes a water storage cylinder 221 fixedly connected to the ring 20. The bottom of the water storage cylinder 221 is provided with a water outlet penetrating through the ring 20. An anti-leakage ring 222 is in interference fit with the upper end of the water storage cylinder 221. An elastic plug 223 is fixedly connected to the anti-leakage ring 222. An opening 224 is provided on the elastic plug 223, and the diameter of the opening 224 gradually decreases from top to bottom; the guiding part 24 includes a support ring 241 with an L-shaped cross-section fixedly connected to the ring 20. An annular groove is provided on the support ring 241. A first disc 242 matched with the annular groove is fixedly connected to the cylinder 23; the supporting part 26 includes a receiving groove 261 arranged in the cylinder 23. A second disc 263 is elastically connected to the receiving groove 261 through a first spring 262. A stop ring matched with the second disc 263 is fixedly connected to the receiving groove 261. The second disc 263 is fixedly connected to the connecting column 25. A support disc 264 is fixedly connected to the bottom of the connecting column 25. There is a gap between the support disc 264 and the collection box 10.

[0036] Among them, the pipeline 21 is directly opposite to the drain port 316 here. When draining the water in the water storage cylinder 221, just open the valve on the pipeline 21. Here, the water outlet pipe 12 is inserted into the anti-leakage ring 222 and cooperates with the elastic plug 223 for plugging to avoid the phenomenon of water leakage in the water storage cylinder 221 during transportation.

[0037] Preferably, the guiding part 27 includes a lever 271 fixedly connected to the connecting column 25. A plurality of first vertical grooves 272 are provided on the inner wall of the ring 20. An arc groove 273 is communicated with the first vertical groove 272. A second vertical groove 274 is communicated with the arc groove 273. A limiting ring matched with the ring 20 is fixedly connected to the inner wall of the collection box 10; the first vertical groove 272, the second vertical groove 274, and the arc groove 273 are a group, and the first vertical groove 272 and the second vertical groove 274 are communicated between adjacent two groups; the one-way part 28 includes an outward expansion groove 281 arranged in the arc groove 273. A transmission shaft is rotatably connected to the outward expansion groove 281. A stop block 282 is fixedly connected to the transmission shaft. A torsion spring 283 is provided on the transmission shaft. The upper end surface of the stop block 282 abuts against the inner wall of the outward expansion groove 281.

[0038] It should be noted that the setting of the first vertical groove 272 allows the water outlet pipe 12 to leave the range of the water storage cylinder 221, so as to facilitate the rotation of the water storage cylinder 221. The setting of the limiting ring can limit the ring 20 and prevent the ring 20 from separating from the collection box 10. The upper end surface of the stop block 282 abuts against the inner wall of the outward expansion groove 281, so that the stop block 282 can deflect downward and cannot deflect upward. Thus, the lever 271 is allowed to enter the first vertical groove 272 from the second vertical groove 274, but cannot enter the second vertical groove 274 from the first vertical groove 272, ensuring the one-way movement of the lever 271.

[0039] During use, let the support plate 264 abut against the tabletop or the ground, then place the outer end of the water outlet pipe 12 under the ground and extend it into the water sample to be collected. Then start the micro water pump 11, and the water flowing out of the water outlet pipe 12 falls into the water storage cylinder 221. Here, control the on-off time of the micro water pump 11 to ensure that the water extraction volume can fill two-thirds of the water storage cylinder 221, which can meet the water volume requirement for sampling and prevent the water in the water storage cylinder 221 from sloshing out due to vibration during transportation. During transportation, the elastic plug 223 seals the upper end of the air storage cylinder 321 to avoid water leakage from the water storage cylinder 221. Here, the setting of the filter cylinder 14 can prevent ice slag (sampling frozen water samples) or foreign objects from entering the water outlet pipe 12 and causing blockage of the water outlet pipe 12.

[0040] When continuous sampling is carried out, it is necessary to replace a different water storage cylinder 221 to the lower end of the water outlet pipe 12. At this time, it is only necessary to press the cylinder 23 through the pressure plate to allow the first disc 242 to move downward, and the first spring 262 is compressed, driving the support ring 241 to move downward, so that the ring 20 moves downward. When the ring 20 moves downward, the lever 271 first moves in the first vertical groove 272. At this time, the water outlet pipe 12 can leave the leak-proof ring 222, so that the water outlet pipe 12 and the leak-proof ring 222 are released, affecting the replacement of the water storage cylinder 221. When the lever 271 cooperates with the connection between the first vertical groove 272 and the arc groove 273, the water outlet pipe 12 is completely on the upper side of the water storage cylinder 221. When the ring 20 rotates to drive the water storage cylinder 221 to deflect, it will not cause the water outlet pipe 12 and the water storage cylinder 221 to be stuck. As shown in FIG, the cylinder 23 is continuously pressed, and the lever 271 cooperates with the arc groove 273. At this time, the ring 20 is deflected, causing the positions of the multiple water storage cylinders 221 to change, until the water storage cylinder 221 adjacent to the water storage cylinder 221 replaces the original water storage cylinder 221, and the water outlet pipe 12 is aligned with the leak-proof ring 222 on the new water storage cylinder 221. Then, under the action of the first spring 262, the ring 20 is reset, driving the water storage cylinder 221 to move upward. At this time, the water outlet pipe 12 is inserted into the leak-proof ring 222. Since the diameter of the opening 224 of the elastic plug 223 decreases from top to bottom, the water outlet pipe 12 moves unimpeded until it moves to the lower side of the elastic plug 223. At this time, water samples from different depths or different regions can be sent into the water storage cylinder 221, realizing rapid replacement of storage containers.

[0041] The setting of the stopper 282 here is that when the detent rod 271 is at the connection between the first vertical groove 272 and the arc groove 273, the stopper 282 cannot deflect upward. At this time, the stopper 282 blocks the detent rod 271 from entering the second vertical groove 274 from the first vertical groove 272 and can only enter the arc groove 273. When the detent rod 271 is downward in the second vertical groove 274 (the description here is relative movement, the actual detent rod 271 does not move, and the ring 20 moves), the stopper 282 can deflect downward, and the detent rod 271 can move from the second vertical groove 274 to the first vertical groove 272. It is worth noting that the detent rod 271 here will not completely disengage from the first vertical groove 272, so that the ring 20 cannot deflect, ensuring that after the water outlet pipe 12 enters the water storage cylinder 221, the water storage cylinder 221 does not shake, thereby ensuring the stability of the docking between the water outlet pipe 12 and the water storage cylinder 221.

[0042] In summary, by setting up a container replacement component, when replacing the container for storing samples, you only need to press the cylinder 23 to rotate the ring 20, driving the multiple water storage cylinders 221 to change their positions, and turn the empty water storage cylinders 221 to the lower side of the water outlet pipe 12, so as to continuously collect water from different water layers and different water areas.

[0043] Example 2, reference Figures 1 to 10, which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a pipeline emptying component for the surface water sample collection device for water pollution detection, solving the problem of how to discharge the water remaining in the water outlet pipe 12 during the previous sampling and interfering with subsequent sampling. It includes a blocking part 30, which includes an extension pipe 301 fixedly connected to the pipeline 21. A sealing plug 302 is slidably connected in the extension pipe 301. The extension pipe 301 and the pipeline 21 are combined into an inverted T shape; the pushing part 31 includes a mounting block 311 fixedly connected to the cylinder 23. The mounting block 311 is provided with a first arc edge 312 and a second arc edge 313. The mounting block 311 is located between the two water storage cylinders 221. A moving plate 314 cooperating with the mounting block 311 is fixedly connected to the sealing plug 302. The moving plate 314 is provided with two bevel edges 315. The support plate 264 is fixedly connected with an edge, and a plurality of drainage ports 316 are provided on the edge.

[0044] Specifically, the pipeline 21 here is L-shaped. In the initial state, the sealing plug 302 is located in the extension pipe 301, and water is discharged from the pipeline 21. When the sealing plug 302 is pushed into the pipeline 21, the water enters the extension pipe 301 from the vertical side of the pipeline 21 and is finally discharged through the extension pipe 301. The width of the moving plate 314 here is smaller than the diameter of the sealing plug 302, so it cannot block the extension pipe 301. The upper end surface of the support plate 264 is inclined, and the closer it is to the cylinder 23, the higher it is, so as to introduce water into the drainage port 316.

[0045] Furthermore, the exhaust part 32 includes an air storage cylinder 321 with one end open and fixedly connected to the pipeline 21. A piston 322 is hermetically slidably connected in the air storage cylinder 321. An L-shaped plate 323 fixed to the piston 322 is fixedly connected to the moving plate 314. The piston 322 is elastically connected to the inner wall of the air storage cylinder 321 through a second spring 324. An air inlet pipe 325 and an air outlet pipe are communicated with the outer end of the air storage cylinder 321. The diameter of the air inlet pipe 325 is much smaller than that of the air outlet pipe. One-way valves are provided in both the air inlet pipe 325 and the air outlet pipe. The air inlet pipe 325 extends to the outside of the pipeline 21 and is threadedly connected with a sealing cylinder 326. A plurality of air permeable holes 327 are provided on the sealing cylinder 326. A sealing plug 328 cooperating with the air inlet pipe 325 is provided on the inner wall of the sealing cylinder 326.

[0046] It should be noted that the diameter of the intake pipe 325 is much smaller than that of the outlet pipe, resulting in a faster outlet speed and a slower intake speed. Therefore, when the moving plate 314 moves towards the direction of the pipe 21, its speed is faster, and when it resets, its speed is slower. When the rotating sealing cylinder 326 is rotated to make the sealing plug 328 cooperate with the intake pipe 325 for sealing, the intake pipe 325 cannot intake air. At this time, the piston 322 cannot move, and the moving plate 314 cannot reset, thus prolonging its reset time. Here, the one-way valve in the intake pipe 325 only allows gas to enter the air storage cylinder 321 from the outside, and the one-way valve in the outlet pipe only allows gas to be discharged from the air storage cylinder 321 to the outside.

[0047] During use, during the replacement process of the water storage cylinder 221, the movement of the ring 20 drives the movement of the pipe 21, causing the moving plate 314 to move. During the movement of the moving plate 314, the moving plate 314 will abut against the first arc edge 312 on the mounting block 311. At this time, the moving plate 314 moves towards the outer end of the pipe 21, causing the sealing plug 302 to enter the pipe 21. Then, the moving plate 314 cooperates with the second arc edge 313. At this time, the moving plate 314 cannot reset. And during the pushing process of the moving plate 314, the L-shaped plate 323 moves, driving the piston 322 to move, and the second spring 324 is compressed, discharging the gas in the air storage cylinder 321. Since the diameter of the outlet pipe is larger, the exhaust is faster. When the replacement of the water storage cylinder 221 is completed, the moving plate 314 is misaligned with the mounting block 311. At this time, under the action of the second spring 324, the piston 322 resets. Since the diameter of the intake pipe 325 is smaller, the intake volume is slower, the intake speed is limited, the reset speed of the L-shaped plate 323 is limited, and the reset speed of the moving plate 314 is limited, resulting in a slower reset speed of the sealing plug 302. The extension pipe 301 is opened for a period of time. At this time, the micro water pump 11 pumps water, and the water sample remaining in the outlet pipe 12 from the previous extraction can be first sent into the water storage cylinder 221 and then flow out through the pipe 21 and the extension pipe 301, avoiding the influence of the residue from the previous water sample extraction on this water sample extraction.

[0048] When the time required to switch water layers is relatively long or when it is necessary to switch water areas, the rotating sealing cylinder 326 can be rotated first to make the sealing plug 328 block the intake pipe 325. At this time, the intake pipe 325 cannot intake air, the piston 322 cannot move, then the L-shaped plate 323 cannot reset, the moving plate 314 cannot reset, and the sealing plug 302 is always in the pipe 21, and the extension pipe 301 is always in the open state until the intake pipe 13 reaches the required position. Then, the micro water pump 11 is turned on, and then the rotating sealing cylinder 326 is rotated to make the sealing plug 328 misaligned with the intake pipe 325. At this time, gas enters the intake pipe 325 through the vent hole 327, enabling the piston 322 to reset and the sealing plug 302 to reset.

[0049] In summary, by setting up the pipeline venting component, it is also possible to automatically open the extension pipe 301 for a period of time after the storage cylinder is replaced, so as to discharge the water sample collected last time in the water outlet pipe 12 first, thus avoiding the influence of the water sample collected last time on the current water sample collection. And by setting up the sealing cylinder 326, it is possible to control when the piston 322 resets, and it can ensure that the water sample in the water outlet pipe 12 last time is completely discharged first.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A surface water sample collection device for water pollution detection, characterized in that: include, The water pumping component comprises a circular collection box (10) with an open bottom, a micro water pump (11) being provided on the outside of the collection box (10), a water outlet pipe (12) of the micro water pump (11) extending into the collection box (10), and a filter cartridge (14) being fixedly connected to a water inlet pipe (13) of the micro water pump (11); A container replacement component comprises a ring (20) arranged in a collection box (10), the ring (20) being provided with a plurality of pipes (21) with valves, the ring (20) being provided with a storage portion (22) for storing water samples, a cylinder (23) penetrating and slidably connected to the collection box (10), the cylinder (23) being provided with a guide portion (24) cooperating with the ring (20), a connecting column (25) being provided on the lower side of the cylinder (23), the cylinder (23) being provided with a support portion (26) for supporting the collection box (10), and the connecting column (25) being provided with a guide portion (27) and a one-way portion (28) for driving the ring (20) to rotate; The pipeline venting component comprises a blocking portion (30) arranged in a pipeline (21), a pushing portion (31) for providing power to the blocking portion (30) is provided on the cylinder (23), and an exhaust portion (32) for extending the time of the blocking portion (30) is provided on the pipeline (21).

2. The surface water sample collection device for water pollution detection according to claim 1, wherein: The storage portion (22) comprises a water storage cylinder (221) fixedly connected to the circular ring (20); a water outlet penetrating the circular ring (20) is provided at the bottom of the water storage cylinder (221); a leak-proof ring (222) is interference-fitted at the upper end of the water storage cylinder (221); an elastic plug (223) is fixedly connected to the leak-proof ring (222); an opening (224) is provided on the elastic plug (223); and the diameter of the opening (224) decreases from top to bottom.

3. The surface water sample collection device for water pollution detection according to claim 2, characterized in that: The guide portion (24) comprises a support ring (241) with an L-shaped cross section fixedly connected to the circular ring (20); an annular groove is provided on the support ring (241); and a first disc (242) matched with the annular groove is fixedly connected to the cylinder (23).

4. The surface water sample collection device for water pollution detection according to claim 3, characterized in that: The support portion (26) includes a receiving groove (261) arranged in the cylinder (23), a second disc (263) is elastically connected to the receiving groove (261) via a first spring (262), a stop ring that cooperates with the second disc (263) is fixedly connected to the receiving groove (261), the second disc (263) is fixedly connected to the connecting column (25), a supporting disc (264) is fixedly connected to the bottom of the connecting column (25), and a distance is provided between the supporting disc (264) and the collection box (10).

5. The surface water sample collection device for water pollution detection according to claim 4, wherein: The guide portion (27) includes a shifting rod (271) fixedly connected to the connecting column (25); a plurality of first vertical grooves (272) are provided on the inner wall of the circular ring (20); an arc-shaped groove (273) is connected to the first vertical groove (272); a second vertical groove (274) is connected to the arc-shaped groove (273); and a limiting ring that cooperates with the circular ring (20) is fixedly connected to the inner wall of the collection box (10).

6. The surface water sample collection device for water pollution detection according to claim 5, wherein: The first vertical groove (272), the second vertical groove (274), and the arc groove (273) form a group, and the first vertical groove (272) communicates with the second vertical groove (274) between adjacent groups.

7. The surface water sample collection device for water pollution detection according to claim 6, wherein: The one-way part (28) includes an outwardly expanding groove (281) arranged in the arc groove (273). A transmission shaft is rotatably connected in the outwardly expanding groove (281). A stop block (282) is fixedly connected to the transmission shaft. A torsion spring (283) is arranged on the transmission shaft. The upper end surface of the stop block (282) abuts against the inner wall of the outwardly expanding groove (281).

8. The surface water sample collection device for water pollution detection according to claim 6 or 7, characterized in that: The plugging part (30) includes an extension pipe (301) fixedly connected to the pipe (21). A sealing plug (302) is slidably connected in the extension pipe (301). The extension pipe (301) and the pipe (21) are combined into an inverted T shape.

9. The surface water sample collection device for water pollution detection according to claim 8, characterized in that: The pushing part (31) includes a mounting block (311) fixedly connected to the cylinder (23). The mounting block (311) is provided with a first arc edge (312) and a second arc edge (313). The mounting block (311) is located between two water storage cylinders (221). A moving plate (314) that cooperates with the mounting block (311) is fixedly connected to the sealing plug (302). The moving plate (314) is provided with two inclined edges (315). The support plate (264) is fixedly connected with an edge, and a plurality of drain ports (316) are arranged on the edge.

10. The surface water sample collection device for water pollution detection according to claim 9, characterized in that: The exhaust part (32) includes an air storage cylinder (321) with one end open and fixedly connected to the pipe (21). A piston (322) is hermetically slidably connected in the air storage cylinder (321). An L-shaped plate (323) fixedly connected to the piston (322) is fixedly connected to the moving plate (314). The piston (322) is elastically connected to the inner wall of the air storage cylinder (321) through a second spring (324). An air inlet pipe (325) and an air outlet pipe are communicated with the outer end of the air storage cylinder (321). The diameter of the air inlet pipe (325) is much smaller than the diameter of the air outlet pipe. One-way valves are arranged in both the air inlet pipe (325) and the air outlet pipe. The air inlet pipe (325) extends to the outside of the pipe (21) and is threadedly connected with a sealing cylinder (326). A plurality of air permeable holes (327) are arranged on the sealing cylinder (326). A sealing plug (328) that cooperates with the air inlet pipe (325) is arranged on the inner wall of the sealing cylinder (326).

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