Water quality detection sampling device

Abstract

The invention relates to a water quality detection sampling device which comprises a shell, an elastic pushing part, four moving blocks, a sampling mechanism and a sampling bottle, the elastic pushing part is connected with the interior of the shell, and the four moving blocks are arrayed at intervals around the length direction of the shell as a center line; every two adjacent moving blocks in the four moving blocks abut against each other to define a water flow hole channel, the four moving blocks can relatively slide in pairs, the elastic pushing part is used for pushing the four moving blocks to relatively slide in pairs at the same time, and the sampling mechanism penetrates through the outer side wall of the shell to be connected with the moving blocks. And the sampling mechanism is used for placing a sampling bottle. Due to the adoption of the technical scheme, when the water quality detection sampling device disclosed by the invention is used for sampling a running water pipeline, the sampled water flow speed can reach a flow speed range suitable for sampling, and the accuracy of water sample detection is improved to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality detection, and in particular to a water quality detection sampling device. Background Art

[0002] With the rapid development of industrialization and the acceleration of urbanization, the protection and rational use of water resources have become an important issue of global concern. As the source of life, the quality of water directly affects human health, the ecological environment, and social and economic development. Therefore, continuous monitoring of water quality has become increasingly important, and accurate and reliable water quality sampling is the basis for water quality monitoring. During the water treatment process, sewage needs to be transported between different treatment equipment through pipelines. In order to quickly sample the water in the pipeline, a sampling valve is often installed in the pipeline. When the sampling valve is opened, some of the water in the pipeline can be discharged through the sampling valve into the sampling bottle, thus achieving sampling work. However, when the existing sampling valve samples water, the water flows in the pipe. If the flow rate is too high, the water flow will easily generate bubbles, resulting in bubbles in the sampled water, affecting the accuracy of the test results; if the water flow rate is too low, the water flow cannot drive impurities in the water through the sampling valve, and the impurities are likely to stay, resulting in inaccurate sampling results, thereby reducing the accuracy of the test results. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a water quality detection sampling device to solve the problem that when the existing technology samples water flow, if the water flow velocity is too large, the water flow will easily generate bubbles, resulting in bubbles in the sampled water, affecting the accuracy of the detection results; if the water flow velocity is too small, the water flow cannot drive impurities in the water through the sampling valve, and the impurities are likely to stay, resulting in inaccurate sampling results, thereby reducing the accuracy of the detection results.

[0004] The present invention is achieved through the following technical solutions: A water quality detection sampling device comprises a shell, wherein openings at both ends of the shell are respectively provided with a water inlet and a water outlet, wherein the water inlet and the water outlet are both connected to a water flow pipe, and further comprises an elastic pushing portion, a moving block, a sampling mechanism and a sampling bottle, wherein the elastic pushing portion is connected to the interior of the shell, and there are four moving blocks, which are arranged in an array with a center line spaced around the length direction of the shell, and two adjacent moving blocks of the four moving blocks contact each other to enclose a water flow channel, and the four moving blocks can slide relative to each other in pairs, and the elastic pushing portion is used to push the four moving blocks to slide relative to each other in pairs at the same time, and the sampling mechanism is connected to the moving blocks through the outer wall of the shell, and the sampling mechanism is used to place a sampling bottle.

[0005] The cam is connected to the sliding groove by a groove in one end face of the movable block, and the length direction of the movable block is arranged along the moving direction of the movable block; the elastic pushing part includes a connecting rod, a fixing ring, a first rotating rod, a sliding rod and a driving part, and the first rotating rod is provided with four, and one end of the four first rotating rods is rotatably connected to the movable block in a one-to-one manner, the fixing ring is arranged coaxially with the water flow channel, the other end of the first rotating rod passes through the fixing ring and is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is hinged to the shell, one end of the sliding rod is connected to the fixing ring, and the other end is slidably connected to the sliding groove, the side surface of the movable block close to an edge of the sliding rod is an arc surface, and the arc surface always abuts against the movable block adjacent to it, and the driving part is used to drive the fixing ring to rotate.

[0006] Furthermore, the driving part includes an impeller, a first gear, a second gear, a torsion spring and a second rotating rod. The first gear is hollow inside, the first gear is coaxially arranged with the fixed ring, one end face of the first gear is rotatably connected to the pipe, the other end face of the first gear abuts the side surface of the moving block, the second gear is connected to any one of the four first rotating rods, the first gear is meshed with the second gear, and the impeller is connected to the first gear; there are four second rotating rods, and the four rotating rods are arrayed around the rotation center line of the four sliding blocks, one end of the second rotating rod is connected to the shell, and the other end of the connecting rod is rotatably connected to the other end of the second rotating rod, the torsion spring is sleeved on the outer circumference of the second rotating rod, and the two ends of the torsion spring are respectively connected to the shell and the other end of the connecting rod.

[0007] Furthermore, the other end of the movable block is recessed inwardly to form a guide groove, and the sampling mechanism includes a guide slider and an elastic mechanism, the guide slider can be slidably connected to the guide groove along the length direction of the slide groove, and the guide slider is recessed inwardly at one end facing the guide groove opening to form a guide groove, and the two ends of the elastic mechanism are respectively connected to the other end of the guide slider and the movable block, and a first through hole is formed through a side wall of the guide groove facing the water flow channel, and a second through hole is provided at a position corresponding to the first through hole on the side wall of the guide groove, and the first through hole corresponds to the second through hole; the sampling bottle includes a bottle body, a movable piston and a one-way valve, the length direction of the bottle body is arranged along the length direction of the guide groove, the bottle body can be slidably fitted in the guide groove, an opening is provided at the bottom of the bottle body, the one-way valve matches the opening, the one-way valve is rotatably connected to the side wall of the opening, and the movable piston can fit in the bottle body and slide.

[0008] The locking rod is arranged along the axial direction of the second gear, and one end of the locking rod is slidably connected to the locking hole, and the other end is connected to the other end of the telescopic rod.

[0009] The beneficial effects of the present invention are: When using a water quality detection sampling device of the present invention to sample a water pipe, the four moving blocks are pushed to move by the elastic pushing part, so that the water flow rate in the water flow channel formed by the mutual interference of two adjacent moving blocks among the four moving blocks changes, until the water flow rate in the water flow channel is in a state that does not generate a large number of bubbles and does not generate a large amount of sedimentation. At this time, sampling the water flow in the water flow channel can ensure the quality of sampling to a certain extent, and improve the accuracy of the water flow detection results to a certain extent.

[0010] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a cross-sectional view of the transverse structure of the present invention; Figure 3 It is a longitudinal structural cross-sectional view of the present invention; Figure 4 It is a structural diagram of the moving block and the elastic pushing part of the present invention; Figure 5 This is a diagram showing the matching of the locking rod and the lock hole bevel of the present invention.

[0012] In the figure: 1. Shell; 11. Water inlet; 12. Water outlet; 2. Elastic pushing part; 21. Connecting rod; 22. Fixing ring; 23. First rotating rod; 24. Sliding rod; 25. Driving part; 251. Impeller; 252. First gear; 253. Second gear; 254. Torsion spring; 255. Second rotating rod; 3. Moving block; 31. Slide groove; 32. Arc surface; 33. Guide groove; 4. Sampling mechanism; 41. Guide slider; 42. Elastic mechanism; 421. Push rod; 422. Spring; 423. Telescopic rod; 424. Locking rod; 425. Locking hole; 426. Inclined surface; 43. Guide groove; 44. First through hole; 45. Second through hole; 5. Sampling bottle; 51. Bottle body; 52. Moving piston; 53. One-way valve DETAILED DESCRIPTION

[0013] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0014] See also Figure 1-5 The present invention provides a technical solution for a water quality detection sampling device: a water quality detection sampling device, comprising a shell 1, wherein the shell 1 has openings at both ends respectively provided with a water inlet 11 and a water outlet 12, wherein the water inlet 11 and the water outlet 12 are both connected to a water flow pipe, and further comprising an elastic pushing portion 2, a moving block 3, a sampling mechanism 4 and a sampling bottle 5, wherein the elastic pushing portion 2 is connected to the inside of the shell 1, and there are four moving blocks 3, and the four moving blocks 3 are arranged in an array with a center line spaced around the length direction of the shell 1. The four moving blocks 3 are adjacent to each other in the four moving blocks 3 and are enclosed to form a water flow channel, and the four moving blocks 3 can slide relative to each other in pairs, and the elastic pushing portion 2 is used to push the four moving blocks 3 to slide relative to each other in pairs at the same time, and the sampling mechanism 4 is connected to the moving block 3 through the outer wall of the shell 1, and the sampling mechanism 4 is used to place the sampling bottle 5.

[0015] Before using a water quality detection sampling device of the present invention to sample a water pipe, the elastic pushing part 2 pushes the four moving blocks 3 away from each other, so that the cross-sectional area of the water flow channel formed by the mutual impact of two adjacent moving blocks 3 among the four moving blocks 3 is the largest. At this time, the cross-sectional size of the water flow channel is larger than the cross-sectional size of the pipe. When the water flows into the water flow channel through the pipe, the water flow cross-section becomes larger, and the water flow speed in this area becomes smaller, which can reduce the possibility of bubbles formed due to excessive water flow speed to a certain extent.

[0016] When using a water quality detection sampling device of the present invention to sample a water pipe, the sampling bottle 5 is first placed in the sampling mechanism 4. After the sampling bottle 5 is placed in the sampling mechanism 4, the elastic pushing part 2 begins to push the four moving blocks 3 closer to each other, so that the cross-sectional area of the water flow channel formed by the mutual impact of two adjacent moving blocks 3 in the four moving blocks 3 becomes smaller, thereby accelerating the water flow rate and reducing the possibility of sedimentation of impurities due to too slow flow rate to a certain extent.

[0017] When the elastic pushing part 2 pushes the four moving blocks 3 toward each other, so that the water flow rate reaches a certain range, the elastic pushing part 2 stops pushing the four moving blocks 3 toward each other. At this time, the water flow rate in the water flow channel formed by the mutual impact of two adjacent moving blocks 3 in the four moving blocks 3 is just enough not to generate a large number of bubbles and a large amount of sedimentation. At this time, sampling the water flow in the water flow channel can ensure the quality of the sample to a certain extent and improve the accuracy of the water flow detection results to a certain extent.

[0018] The cam 32 is connected to the cam 31 by the spring 22 and the spring 23 is connected to the cam 31 by the spring 23. The cam 32 is connected to the cam 31 by the spring 23 and the cam 23 is connected to the cam 31 by the spring 23.

[0019] When the sampling bottle 5 is placed in the sampling mechanism 4, the driving part 25 drives the fixed ring 22 to rotate. Since the fixed ring 22 is coaxially arranged with the water flow channel, the other end of the first rotating rod 23 passes through the fixed ring 22 and is rotatably connected to one end of the connecting rod 21. One end of the sliding rod 24 is connected to the fixed ring 22. The rotation of the fixed ring 22 can drive the first rotating rod 23 and the sliding rod 24 to make a circular motion around the center line of the fixed ring 22. Since one end of the four first rotating rods 23 is rotatably connected to the moving block 3 in a one-to-one corresponding manner, the other end of the first rotating rod 23 passes through the fixed ring 22 and is rotatably connected to the connecting rod 21, the other end of the connecting rod 21 is hinged to the shell, and the other end of the sliding rod 24 is slidably connected to the sliding groove 31. When the first rotating rod 23 and the sliding rod 24 make circular motion around the center line of the fixed ring 22, the first rotating rod 23 and the sliding rod 24 can drive the two adjacent moving blocks 3 to slide relative to each other. Since the side surface of the moving block 3 close to an edge of the sliding rod 24 is an arc-shaped surface 32, the arc-shaped surface 32 and its adjacent moving block 3 are always in contact with each other. When the two adjacent moving blocks 3 slide relative to each other, the two adjacent moving blocks 3 among the four moving blocks 3 are enclosed with each other to always form a water flow channel.

[0020] With this structure, the elastic pushing portion 2 can push the four moving blocks 3 to slide relative to each other at the same time, and when the four moving blocks 3 slide relative to each other at the same time, they can always enclose and form a water flow channel.

[0021] In this embodiment: the driving part 25 includes an impeller 251, a first gear 252, a second gear 253, a torsion spring 254 and a second rotating rod 255, the first gear 252 is hollow inside, the first gear 252 is coaxially arranged with the fixing ring 22, one end face of the first gear 252 is rotatably connected to the pipe, and the other end face of the first gear 252 abuts against the side elevation of the moving block 3, the second gear 253 is connected to any one of the four first rotating rods 23, the first gear 252 is meshed with the second gear 253, and the impeller 251 is connected to the first gear 252; there are four second rotating rods 255, and the four rotating rods are arranged in an array at intervals around the rotation center line of the four sliding blocks, one end of the second rotating rod 255 is connected to the housing 1, and the other end of the connecting rod 21 is rotatably connected to the other end of the second rotating rod 255, the torsion spring 254 is sleeved on the outer circumferential surface of the second rotating rod 255, and the two ends of the torsion spring 254 are respectively connected to the housing 1 and the other end of the connecting rod 21.

[0022] When the water flow does not flow into the water flow channel, since one end of the second rotating rod 255 is connected to the shell 1, the other end of the connecting rod 21 is rotatably connected to the other end of the second rotating rod 255, and the torsion spring 254 is sleeved on the outer peripheral surface of the second rotating rod 255. The two ends of the torsion spring 254 are respectively connected to the shell 1 and the other end of the connecting rod 21. The torsion spring 254 pushes the connecting rod 21 so that the connecting rod 21 pushes the first rotating rod 23, so that the first rotating rod 23 pushes the moving block 3 to maintain a certain balanced position. At this time, the cross-sectional area of the water flow channel formed by the mutual interference of two adjacent moving blocks 3 among the four moving blocks 3 is the smallest.

[0023] When water flows through the water flow channel, the water flows through the impeller 251 and drives the impeller 251 to rotate. Since the impeller 251 is connected to the first gear 252, the rotation of the impeller 251 starts to drive the first gear 252 to rotate. Since the first gear 252 is engaged with the second gear 253, the second gear 253 is connected to any one of the four first rotating rods 23. The rotation of the first gear 252 can drive the second gear 253 to perform a circular motion around the rotation center line of the first gear 252, thereby driving any one of the four first rotating rods 23 to perform a circular motion. Since the first gear 252 is coaxially arranged with the fixing ring 22, the other end of the first rotating rod 23 passes through the fixing ring 22 and is rotatably connected to one end of the connecting rod 21. The first rotating rod 23 performs a circular motion around the first gear 252 to drive the fixing ring 22 to rotate. With this structure, the driving part 25 can drive the fixing ring 22 to rotate.

[0024] At this time, the first rotating rod 23 makes a circular motion around the center line of the first gear 252, that is, it pushes one end of the connecting rod 21 to make a circular motion around the center line of the first gear 252, and the other end of the connecting rod 21 will push the torsion spring 254 to compress; at this time, since the cross-sectional area of the water flow channel formed by the mutual interference of the two adjacent moving blocks 3 in the four moving blocks 3 begins to increase, the water flow rate gradually decreases, thereby reducing the impact of the water flow on the impeller 251, and driving the impeller 251 to rotate with a smaller amplitude, until the water flow rate reaches the impact impeller 251 so that the impeller 251 rotation amplitude and the compression degree of the torsion spring 254 are offset. At this time, the cross-sectional area of the water flow channel formed by the mutual interference of the two adjacent moving blocks 3 in the four moving blocks 3 forms a stable state, and the flow rate at this time is a flow rate suitable for sampling the water flow.

[0025] With this structure, the water flow velocity in the water flow channel can be maintained within a flow velocity range suitable for sampling.

[0026] In this embodiment: the other end of the moving block 3 is recessed inward to form a guide groove 33, the sampling mechanism 4 includes a guide slider 41 and an elastic mechanism 42, the guide slider 41 can be slidably connected to the guide groove 33 along the length direction of the slide 31, the guide slider 41 is recessed inward to form a guide groove 43 toward the end of the guide groove 33, the two ends of the elastic mechanism 42 are respectively connected to the other end of the guide slider 41 and the moving block 3, the guide groove 43 is penetrated by a side wall facing the water flow channel to form a first through hole 44, the guide groove 3 A second through hole 45 is provided at a position on the side wall corresponding to the first through hole 44, and the first through hole 44 corresponds to the second through hole 45; the sampling bottle 5 includes a bottle body 51, a movable piston 52 and a one-way valve 53. The length direction of the bottle body 51 is arranged along the length direction of the guide groove 33, and the bottle body 51 can be slidably fitted in the guide groove 33. An opening is provided at the bottom of the bottle body 51, and the one-way valve 53 matches the opening. The one-way valve 53 is rotatably connected to the side wall of the opening, and the movable piston 52 can slide in the bottle body 51.

[0027] When the bottle body 51 is not pushed into the guide groove 33, the elastic mechanism 42 pushes the guide slider 41 to move to the middle of the guide groove 33. At this time, the positions of the first through hole 44 and the second through hole 45 are staggered with each other, and the side of the guide slider 41 where the first through hole 44 is not provided blocks the second through hole 45. With this structure, water cannot enter the guide groove 43 through the first through hole 44 and the second through hole 45. The guide slider 41 blocks the second through hole 45 to prevent water from flowing out.

[0028] When it is necessary to use the sampling bottle for sampling, the bottle body 51 is first pushed into the guide groove 33, and the bottle body 51 slides in the guide groove 33 and then abuts the guide slider 41 and pushes the guide slider 41. When the guide slider 41 slides to a position where the first through hole 44 and the second through hole 45 are opposite to each other, the other end of the guide slider 41 abuts against the inner wall of one end of the guide groove 33 and stops sliding. At this time, the water can enter the guide groove 43 through the first through hole 44 and the second through hole 45. At this time, the elastic mechanism 42 is compressed by pressure; the water after entering the guide groove 43 pushes the one-way valve 53 at the bottom of the bottle body 51 to rotate, so that the bottom of the bottle body 51 is opened, and the water flows into the bottle body 51 through the one-way valve 53. The water entering the bottle body 51 will further push the piston to move until the piston abuts against the bottle mouth. With this structure, the sampling bottle 5 completes the sampling of the water flow.

[0029] After the sampling is completed and the sampling bottle 5 is taken out, since the two ends of the elastic mechanism 42 are respectively connected to the other end of the guide slider 41 and the moving block 3, the elastic mechanism 42 will push the guide slider 41 to reset, so that the side of the guide slider 41 where the first through hole 44 is not set continues to block the second through hole 45.

[0030] In this embodiment, the elastic mechanism 42 further includes a push rod 421, a spring 422, a telescopic rod 423 and a locking rod 424. The push rod 421 is arranged along the length direction of the guide groove 33. The push rod 421 passes through the side wall of the groove to be slidably connected to the moving block 3 along the length direction of the push rod 421. One end of the push rod 421 is connected to the other end face of the guide slider 41. The telescopic rod 423 is arranged perpendicular to the push rod 421. One end of the telescopic rod 423 is rotatably connected to the other end of the push rod 421. The other end of the telescopic rod 423 is rotatably connected to the The first rotating rod 23, the spring 422 is sleeved on the outer circumference of the push rod 421, and the two ends of the spring 422 are respectively connected to the moving block 3 and the one end of the telescopic rod 423; the second gear 253 is provided with a lock hole 425 on one side wall facing the telescopic rod 423, and the lock hole 425 is arranged along an arc, and the bottom wall of the lock hole 425 is formed with an inclined surface 426 with different depths at both ends, and the locking rod 424 is arranged along the axial direction of the second gear 253, and one end of the locking rod 424 is slidably connected to the lock hole 425, and the other end is connected to the other end of the telescopic rod 423.

[0031] When sampling is not being performed, one end of the locking rod is located in the locking hole 425 and abuts against the deepest part of the inclined surface 426, so that the rotation of the second gear 253 is restricted by this structure. Since the push rod 421 passes through the side wall of the groove to be slidably connected to the moving block 3 along the length direction of the push rod 421, the spring 422 is sleeved on the outer circumference of the push rod 421, and the two ends of the spring 422 are respectively connected to the moving block 3 and the one end of the telescopic rod 423. When the sampling bottle 5 pushes the guide slider 41 to one end of the guide groove 33, the one end of the telescopic rod 423 moves away from the moving block 3. The guide slider 41 pushes the spring 422 to stretch; and since one end of the telescopic rod 423 is rotatably connected to the other end of the push rod 421, the other end of the telescopic rod 423 is rotatably connected to the first rotating rod 23, one end of the locking rod 424 is slidably connected to the lock hole 425, and the other end is connected to the other end of the telescopic rod 423, the other end of the telescopic rod 423 moves along with the one end of the telescopic rod 423 in the direction away from the moving block 3, thereby driving the locking rod 424 to move in the direction away from the second gear 253.

[0032] When the guide slider 41 abuts against the inner wall of one end of the guide groove 33, the locking rod 424 just disengages from the second gear 253. At this time, the locking rod 424 unlocks the second gear 253, and the second gear 253 can engage with the first gear 252 to adjust the distance between the moving blocks 3.

[0033] When sampling is stopped and the operator takes the sampling bottle 5 out of the sampling mechanism 4, the spring 422 pushes the guide slider 41 to move toward the opening of the guide groove 33, so that the side wall of the guide slider 41 without the first through hole 44 blocks the second through hole 45. At this time, the slide bar 24 moves with the guide slider 41, thereby driving the telescopic rod 423 to move toward the second gear 253, and the one end of the locking rod 424 also moves toward the second gear 253 until the locking rod 424 is inserted into the locking hole 425. The bottom wall of 5 is formed with an inclined surface 426 of different depths at both ends. When the one end of the locking rod 424 abuts against the inclined surface 426, it pushes the second gear 253 to rotate along the inclined surface 426, thereby driving the first gear 252 to rotate and driving the four moving blocks 3 to move away from each other and reset. As a result, when the water quality detection and sampling device of the present invention is not testing the water quality, the water flow velocity in the water flow channel is reduced, reducing the impact of the water flow on the moving block 3, and to a certain extent increasing the service life of the water quality detection and sampling device of the present invention.

[0034] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A water quality detection sampling device, comprising a housing, wherein the housing has openings at both ends respectively provided with a water inlet and a water outlet, wherein the water inlet and the water outlet are both connected to a water pipe, and wherein: It also includes an elastic pushing part, a moving block, a sampling mechanism and a sampling bottle. The elastic pushing part is connected to the inside of the shell. There are four moving blocks. The four moving blocks are arranged in an array with a center line spaced around the length direction of the shell. Two adjacent moving blocks among the four moving blocks are in contact with each other to form a water flow channel. The four moving blocks can slide relative to each other in pairs. The elastic pushing part is used to push the four moving blocks to slide relative to each other in pairs at the same time. The sampling mechanism is connected to the moving blocks through the outer wall of the shell. The sampling mechanism is used to place the sampling bottle.

2. A water quality detection sampling device according to claim 1, characterized in that: The cam is connected to the sliding groove of the sliding block by a groove at one end of the sliding block, and the length direction of the sliding groove is arranged along the moving direction of the sliding block; the elastic pushing part includes a connecting rod, a fixing ring, a first rotating rod, a sliding rod and a driving part, and the first rotating rod is provided with four, and one end of the four first rotating rods is rotatably connected to the moving block in a one-to-one manner, the fixing ring is arranged coaxially with the water flow channel, the other end of the first rotating rod passes through the fixing ring and is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is hinged to the shell, one end of the sliding rod is connected to the fixing ring, and the other end is slidably connected to the sliding groove, the side surface of the moving block close to an edge of the sliding rod is an arc surface, and the arc surface always abuts against the moving block adjacent to it, and the driving part is used to drive the fixing ring to rotate.

3. A water quality detection sampling device according to claim 2, characterized in that: The driving part includes an impeller, a first gear, a second gear, a torsion spring and a second rotating rod. The first gear is hollow inside, and the first gear is coaxially arranged with the fixed ring. One end face of the first gear is rotatably connected to the pipe, and the other end face of the first gear abuts the side surface of the moving block. The second gear is connected to any one of the four first rotating rods, and the first gear is meshed with the second gear. The impeller is connected to the first gear; there are four second rotating rods, and the four rotating rods are arrayed around the rotation center lines of the four sliding blocks. One end of the second rotating rod is connected to the housing, and the other end of the connecting rod is rotatably connected to the other end of the second rotating rod. The torsion spring is sleeved on the outer circumference of the second rotating rod, and the two ends of the torsion spring are respectively connected to the housing and the other end of the connecting rod.

4. A water quality detection sampling device according to claim 3, characterized in that: The other end of the movable block is recessed inward to form a guide groove, and the sampling mechanism includes a guide slider and an elastic mechanism, the guide slider can be slidably connected to the guide groove along the length direction of the slide groove, and the guide slider is recessed inward at one end facing the guide groove opening to form a guide groove, and the two ends of the elastic mechanism are respectively connected to the other end of the guide slider and the movable block, and a first through hole is formed through a side wall of the guide groove facing the water flow channel, and a second through hole is provided at a position corresponding to the first through hole on the side wall of the guide groove, and the first through hole corresponds to the second through hole; the sampling bottle includes a bottle body, a movable piston and a one-way valve, the length direction of the bottle body is arranged along the length direction of the guide groove, the bottle body can be slidably fitted in the guide groove, the bottom of the bottle body is provided with an opening, the one-way valve matches the opening, the one-way valve is rotatably connected to the side wall of the opening, and the movable piston can fit in the bottle body and slide.

5. A water quality detection sampling device according to claim 4, characterized in that: The cam is connected to the sliding block by a spring, and the other end of the cam is connected to the sliding block by a spring.

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