A water quality detection sampling device

Abstract

The invention relates to the technical field of water quality detection, and in particular to a water quality detection sampling device, comprising an outer shell, which is a cylindrical hollow structure; a floating body, which is installed at the middle part of the outer side of the outer shell, and the floating body is used to drive the outer shell to float on the water surface; a filter frame, which is installed at the lower end of the outer side of the outer shell, and the filter frame is evenly provided with filter holes, and the filter frame is used to filter floating objects on the upper layer of the water surface; a sampling component, which is installed inside the outer shell, and the sampling component is used to sample water qualities at different depths in multiple areas one by one; when the sampling cylinder in the invention descends to the lowest point, the sampling cylinder is just opened, and the sampling cylinder is vertically inserted into the water, and the collecting cylinders at different heights on the sampling cylinder can play the function of layered sampling, and multiple sampling cylinders can perform layered sampling on different sampled water qualities one by one.

Description

Technical Field

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

[0002] The collection and preservation of water samples in water quality testing is a key link, which determines the accuracy and comprehensiveness of the analysis results. First of all, water samples should be collected at designated sampling points using appropriate containers, while avoiding direct contact or contamination of samples. Secondly, the layout of water quality sampling points is also an important link, which is related to whether the water quality monitoring and analysis data is representative and whether it can truly reflect the current status and changing trends of water quality.

[0003] The Chinese patent with announcement number CN 219798875 U and name “A stratified sampler for water quality detection” specifically provides a magnetic plate and a semi-ring storage tube, and utilizes the adsorption and fixed connection between the two to enable the semi-ring sampling tube for water quality detection sampling to be placed at different length positions of the sampling rod. By utilizing multiple semi-ring sampling tubes, multi-layer sampling of water quality at different depths in the same environment can be performed, thereby improving the sampling efficiency of the water quality sampler.

[0004] The above-mentioned existing technology can also realize the function of sampling water quality when in use. However, when sampling water quality, the above-mentioned existing technology requires manual hand-held operation when sampling, and cannot automatically sample water quality, which is not convenient for staff to sample water quality in each area separately. At the same time, samples of different depths after sampling are prone to mixing, which is not conducive to subsequent water quality testing. Based on this, there is still room for improvement on the basis of existing water quality testing sampling equipment. Summary of the invention

[0005] In order to accurately realize the function of zoning and stratifying water quality and ensure accurate detection of water quality, the present application provides a water quality detection sampling device.

[0006] The water quality detection sampling device provided in this application adopts the following technical solution:

[0007] A water quality detection sampling device comprises an outer shell which is a cylindrical hollow structure; a floating body which is installed at the middle of the outer side of the outer shell and is used to drive the outer shell to float on the water surface; a filter frame which is installed at the lower end of the outer side of the outer shell and is evenly provided with filter holes on the filter frame and is used to filter floating objects on the upper layer of the water surface; and a sampling component which is installed inside the outer shell and is used to sample water quality at different depths in multiple areas one by one.

[0008] The sampling assembly includes a fixed frame, a rotating member, a material storage unit, a sampling barrel, a barrel taking unit and a pull-down unit. A fixed frame is installed in the middle of the shell. The fixed frame is a cylindrical structure. An open groove is arranged on one side of the fixed frame. A circular outlet is arranged at the lower end of the fixed frame. An annular groove is arranged between the outer side of the fixed frame and the inner wall of the shell. A rotating member is installed at the lower end of the annular groove. A material storage unit is installed at the upper end of the annular groove. The material storage unit can be withdrawn. The lower end of the material storage unit is plugged with the rotating member. Sampling barrels are evenly installed inside the material storage unit. The barrel taking unit is installed inside the open groove. The pull-down unit is installed at the lower end of the fixed frame. The barrel taking unit is used to pull the sampling barrel inside the material storage unit into the open groove. The pull-down unit is used to pull the sampling barrel inside the open groove downward and sample water quality at different depths one by one.

[0009] Furthermore, the rotating member is an electric turntable, and positioning rods are evenly arranged on the electric turntable.

[0010] Furthermore, the material storage unit includes a rotating frame and a limiting clamping column. The annular groove is provided with a rotating frame, the rotating frame is in a circular ring structure, the limiting clamping columns are evenly arranged inside the rotating frame, and positioning grooves are arranged between adjacent limiting clamping columns. The sampling barrel is installed in the positioning groove, and the limiting clamping column is symmetrically provided with arc-shaped grooves. An electromagnet is installed on the inner wall of the arc-shaped groove, and the outer wall of the sampling barrel cooperates with the electromagnet.

[0011] Furthermore, the sampling tube includes a fixed tube, a collecting tube and a clamping mechanism. The fixed tube is a cylindrical structure, and the fixed tube is gap-matched with the circular outlet. The fixed tube is located inside the positioning groove. The fixed tube is evenly provided with installation grooves, and the collecting tube is installed in the installation groove. A clamping mechanism is installed inside the fixed tube, and the clamping mechanism is used to compress and seal the upper end of the collecting tube.

[0012] Furthermore, the clamping mechanism includes a guide rod, a connecting spring, a cross bar and a clamping plate. Guide grooves are provided on both sides of the fixed cylinder, guide rods are slidably provided in the guide grooves, cross bars are connected between the upper ends of the guide rods, both ends of the cross bars protrude outward, connecting springs are evenly provided on the guide rods, a clamping plate is provided at the upper end of the installation groove, and both ends of the clamping plate are respectively installed on the two guide rods.

[0013] Furthermore, a semicircular groove is provided at the lower end of the sampling tube, and transversely arranged jacks are evenly provided on the inner wall of the semicircular groove.

[0014] Furthermore, the tube taking unit includes an electric slider and a material taking rack. The inner wall of the opening groove is symmetrically provided with a slide groove, the electric slider is installed in the slide groove, and the material taking rack is installed between the two electric sliders. An arc surface cooperating with the sampling tube is provided on one side of the material taking rack, and an electromagnet 2 cooperating with the sampling tube for adsorption is provided on the inner concave surface of the material taking rack.

[0015] Furthermore, the pull-down unit includes a piston chamber, a piston rod, an annular plate and a plug-in rod. The piston chamber is evenly arranged on the fixed frame, a piston rod is arranged inside the piston chamber, an annular plate is installed between the lower ends of the piston rods, a plug-in rod is installed on the upper end of the annular plate, and the upper end of the plug-in rod is located inside the circular outlet.

[0016] Furthermore, the diameter of the plug-in rod is the same as that of the sampling tube, a semicircular plug-in frame is provided at the upper end of the plug-in rod, plug-in rods are evenly arranged on the plug-in frame, and the plug-in rods match with the sockets at the lower end of the sampling tube.

[0017] Furthermore, sealing rings are evenly arranged on the inner wall of the circular outlet, the interior of the sealing rings is filled with a metal layer, and the outer side surface of the sealing rings is in close contact with the outer wall of the plug rod.

[0018] In the above technical scheme, the present invention provides a water quality detection sampling device, in which a plurality of sampling barrels are arranged inside the material storage unit. The sampling barrels are movably arranged, and the sampling barrels cooperate with the barrel unit and the pull-down unit for use. When it is necessary to sample the water quality, the barrel unit pulls a sampling barrel inward, and at the same time, the lower end of the sampling barrel can just fit with the upper end of the pull-down unit, and the pull-down unit can then pull the sampling barrel into the water. When the sampling barrel drops to the lowest point, the sampling barrel is just opened, and the sampling barrel is vertically inserted into the water. The collecting barrels at different heights on the sampling barrel can play the role of stratified sampling, and the plurality of sampling barrels can perform stratified sampling on different sampled water qualities one by one; when the sampling barrel has finished sampling, the sampling barrel can be quickly closed when it rises, so as to avoid the mixing of water samples of different depths and ensure the accuracy of subsequent water quality detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0021] Figure 2 It is a schematic diagram of the cutaway structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention.

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure between the housing and the sampling component of the present invention.

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure between the material storage unit and the sampling tube of the present invention.

[0025] Figure 6 It is a three-dimensional structural schematic diagram of the sampling tube of the present invention.

[0026] Figure 7 It is a schematic diagram of the cross-sectional structure of the sampling tube of the present invention.

[0027] Figure 8 It is a schematic diagram of the cross-sectional structure between the housing, the fixing frame, the barrel taking unit and the pull-down unit of the present invention.

[0028] Fig. 9 It is a schematic diagram of the three-dimensional structure among the housing, the fixing frame, the tube taking unit and the pull-down unit of the present invention.

[0029] Fig.10 It is a schematic diagram of the cross-section structure among the housing, the fixing frame, the barrel taking unit and the pull-down unit of the present invention.

[0030] Explanation of the reference numerals: 1. outer shell; 2. floating body; 3. filter frame; 4. sampling assembly; 41. fixed frame; 42. rotating member; 421. positioning plug rod; 43. material storage unit; 431. rotating frame; 432. limiting clamp column; 44. sampling cylinder; 441. fixed cylinder; 442. collecting cylinder; 443. clamping mechanism; 4431. guide rod; 4432. connecting spring; 4433. cross bar; 4434. clamping plate; 45. cylinder unit; 451. electric slider; 452. material rack; 46. pull-down unit; 461. piston chamber; 462. piston rod; 463. annular plate; 464. plug-in rod. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1-10 A water quality detection sampling device provided in an embodiment of the present invention includes a shell 1, which is a cylindrical hollow structure; and a floating body 2, which is installed in the middle of the outer side of the shell 1, and the floating body 2 is used to drive the shell 1 to float on the water surface; a filter frame 3, which is installed at the lower end of the outer side of the shell 1, and the filter frame 3 is evenly provided with filter holes, and the filter frame 3 is used to filter floating objects on the upper layer of the water surface; a sampling component 4, which is installed inside the shell 1, and the sampling component 4 is used to sample the water quality at different depths in multiple areas one by one.

[0033] See also Figure 2-Figure 4As shown, the sampling assembly 4 includes a fixed frame 41, a rotating member 42, a material storage unit 43, a sampling tube 44, a tube unit 45 and a pull-down unit 46. The fixed frame 41 is installed in the middle of the shell 1. The fixed frame 41 is a cylindrical structure. An open groove is provided on one side of the fixed frame 41. A circular outlet is provided at the lower end of the fixed frame 41. An annular groove is provided between the outer side of the fixed frame 41 and the inner wall of the shell 1. The rotating member 42 is installed at the lower end of the annular groove. The material storage unit 43 is installed at the upper end of the annular groove. Element 43, the material storage unit 43 can be withdrawn, the lower end of the material storage unit 43 is plugged into the rotating member 42, sampling tubes 44 are evenly installed inside the material storage unit 43, a tube unit 45 is installed inside the open groove, and a pull-down unit 46 is installed at the lower end of the fixed frame 41, the tube unit 45 is used to pull the sampling tube 44 inside the material storage unit 43 into the open groove, and the pull-down unit 46 is used to pull the sampling tube 44 inside the open groove downwards and sample the water quality at different depths one by one.

[0034] In the above technical solution, the rotating member 42 is used to drive the material storage unit 43 to rotate at a uniform speed, and the sampling barrel 44 is evenly arranged inside the material storage unit 43. When the material storage unit 43 drives the sampling barrel 44 to move to the position corresponding to the opening groove, the barrel unit 45 moves outward to adsorb and fix the sampling barrel 44, and then the barrel unit 45 moves inward to pull the sampling barrel 44 into the middle of the opening groove. At the same time, the lower end of the sampling barrel 44 is just plugged into the pull-down unit 46. The pull-down unit 46 can drive the sampling barrel 44 to be pulled downward from the inside of the fixed frame 41, so that the sampling barrel 44 can enter the water body to be sampled. When the sampling barrel 44 drops to the lowest point, the sampling barrel 44 opens, and the sampling barrel 44 enters to sample the water quality at different depths one by one.

[0035] It should be noted that the floating body 2 can drive the shell 1 to float on the water surface, and at the same time, the floating body 2 can drive the shell 1 to move on the water surface. By controlling the movement of the floating body 2, the water quality of different areas on the water body can be sampled.

[0036] See also Figure 4 As shown, as a preferred technical solution of this embodiment, the rotating member 42 is an electric turntable, and positioning rods 421 are evenly arranged on the electric turntable.

[0037] In the above technical solution, the material storage unit 43 can be pulled out and set. When the material storage unit 43 is placed inside the annular groove, the lower end of the material storage unit 43 is just plugged into the positioning rod 421, so that the electric turntable can drive the material storage unit 43 to rotate at a uniform speed, which is convenient for the multiple sampling tubes 44 inside the material storage unit 43 to take samples separately.

[0038] See also Figure 5-Figure 6As shown, as a preferred technical solution of this embodiment, the material storage unit 43 includes a rotating frame 431 and a limiting clamping column 432. The rotating frame 431 is arranged inside the annular groove. The rotating frame 431 is in a circular ring structure. The limiting clamping columns 432 are evenly arranged inside the rotating frame 431. Positioning grooves are arranged between adjacent limiting clamping columns 432. The sampling barrel 44 is installed in the positioning groove. The limiting clamping columns 432 are symmetrically arranged with arc grooves. An electromagnet 1 is installed on the inner wall of the arc groove. The outer wall of the sampling barrel 44 cooperates with the electromagnet 1.

[0039] In the above technical solution, handles are symmetrically arranged at the upper end of the rotating frame 431, and the rotating frame 431 can be easily taken out by the handle. The lower end of the rotating frame 431 is evenly provided with plug-in grooves that cooperate with the positioning plug rod 421, so that the lower end of the rotating frame 431 can accurately cooperate with the rotating member 42. When the rotating member 42 drives the rotating frame 431 to rotate, the sampling tube 44 inside the rotating frame 431 rotates synchronously, and the electromagnet 1 can accurately suck and fix the outer wall of the sampling tube 44 to prevent the sampling tube 44 from detaching and falling during rotation.

[0040] When the sampling tube 44 moves to the position corresponding to the opening slot, the tube unit 45 moves outward and is in close contact with the inner side of the sampling tube 44. At this time, the electromagnet inside the positioning slot is powered off. At the same time, the tube unit 45 can adsorb and fix the inner side of the sampling tube 44, thereby realizing the function of pulling the sampling tube 44 into the middle of the opening slot.

[0041] See also Figure 6-Figure 7 As shown, as the preferred technical solution of this embodiment, the sampling cylinder 44 includes a fixed cylinder 441, a collecting cylinder 442 and a clamping mechanism 443. The fixed cylinder 441 is a cylindrical structure, and the fixed cylinder 441 is matched with the circular outlet gap. The fixed cylinder 441 is located inside the positioning groove, and mounting grooves are evenly arranged on the fixed cylinder 441. The collecting cylinder 442 is installed in the mounting groove. A clamping mechanism 443 is installed inside the fixed cylinder 441, and the clamping mechanism 443 is used to compress and seal the upper end of the collecting cylinder 442.

[0042] In the above technical solution, a plurality of collecting cylinders 442 are arranged inside the fixed cylinder 441, and the collecting cylinders 442 are arranged in sequence along the length direction of the collecting cylinder 442. When the fixed cylinder 441 is inserted into the water body, the plurality of collecting cylinders 442 can just be in areas of different depths. When the fixed cylinder 441 moves downward to the lowest point, the upper end of the clamping mechanism 443 is limited, and the clamping mechanism 443 is separated from the upper end of the collecting cylinder 442. The water to be sampled can enter the collecting cylinder 442, and the collecting cylinder 442 can then synchronously sample water bodies of different depths.

[0043] When the collecting tube 442 has finished sampling, the fixed tube 441 moves upward, and the clamping mechanism 443 continues to press and seal with the upper end of the collecting tube 442, so that the sampled liquid inside the collecting tube 442 will be sealed and preserved, so that the liquid inside the collecting tube 442 will not leak, and liquids at different depths will not mix, thereby ensuring the accuracy of liquid detection after sampling.

[0044] See also Figure 7 As shown, as the preferred technical solution of this embodiment, the clamping mechanism 443 includes a guide rod 4431, a connecting spring 4432, a cross bar 4433 and a clamping plate 4434, guide grooves are arranged on both sides of the fixed cylinder 441, guide rods 4431 are slidably arranged in the guide grooves, cross bars 4433 are connected between the upper ends of the guide rods 4431, both ends of the cross bars 4433 protrude outward, connecting springs 4432 are evenly arranged on the guide rods 4431, a clamping plate 4434 is arranged at the upper end of the mounting groove, and both ends of the clamping plate 4434 are respectively mounted on the two guide rods 4431.

[0045] In the above technical solution, both ends of the cross bar 4433 protrude outward from the fixed cylinder 441, and the fixed cylinder 441 is matched with the circular outlet gap, so that when the cross bar 4433 moves downward, the cross bar 4433 will not pass through the circular outlet, and the cross bar 4433 will be blocked. When the cross bar 4433 is blocked, the cross bar 4433 drives the clamping plate 4434 to move upward through the guide rod 4431, and the clamping plate 4434 will be separated from the upper end of the collecting cylinder 442, and the collecting cylinder 442 will sample water at different depths.

[0046] It should be noted that the lower end of the cross bar 4433 is connected to the fixed tube 441 through an elastic pad. When the cross bar 4433 is gradually separated from the fixed tube 441, the elastic pad can still seal the gap between the cross bar 4433 and the fixed tube 441 to prevent water from entering the interior of the shell 1 through the circular outlet, so that the interior of the shell 1 can be in a sealed state.

[0047] Continue reading Figure 7 As shown, as a preferred technical solution of this embodiment, a semicircular groove is provided at the lower end of the sampling tube 44, and transversely arranged jacks are evenly provided on the inner wall of the semicircular groove.

[0048] Continue reading Figure 8-Figure 9 As shown, as the preferred technical solution of this embodiment, the barrel taking unit 45 includes an electric slider 451 and a material taking rack 452, the inner wall of the opening groove is symmetrically provided with slide grooves, the electric slider 451 is installed in the slide groove, and the material taking rack 452 is installed between the two electric sliders 451, and an arc surface cooperating with the sampling barrel 44 is provided on one side of the material taking rack 452, and an electromagnet 2 cooperating with the sampling barrel 44 is provided on the inner concave surface of the material taking rack 452.

[0049] In the above technical solution, the electric slider 451 can drive the material rack 452 to move outward, so that the material rack 452 can move to the contact position with the sampling tube 44, and the electromagnet two on the inner side of the material rack 452 adsorbs and fixes the sampling tube 44. At the same time, the electric slider 451 pulls the sampling tube 44 to the inside of the opening slot through the material rack 452, so that the pull-down unit 46 can drive the sampling tube 44 to move downward.

[0050] Continue reading Figure 8-Figure 10 As shown, as the preferred technical solution of this embodiment, the pull-down unit 46 includes a piston chamber 461, a piston rod 462, an annular plate 463 and a plug-in rod 464, the piston chamber 461 is evenly arranged on the fixed frame 41, the piston rod 462 is arranged inside the piston chamber 461, an annular plate 463 is installed between the lower ends of the piston rod 462, the plug-in rod 464 is installed on the upper end of the annular plate 463, and the upper end of the plug-in rod 464 is located inside the circular outlet.

[0051] See also Figure 8-Figure 10 As shown, as the preferred technical solution of this embodiment, the diameter of the plug-in rod 464 is the same as the diameter of the sampling tube 44, and a semicircular plug-in rack is provided at the upper end of the plug-in rod 464, and plug-in rods are evenly arranged on the plug-in rack, and the plug-in rods cooperate with the sockets at the lower end of the sampling tube 44.

[0052] In the above technical solution, when the barrel unit 45 drives the sampling barrel 44 to move to the middle of the opening groove, the jack at the lower end of the sampling barrel 44 just cooperates with the plug rod, so that the sampling barrel 44 can form a whole with the plug rod 464, and when the piston rod 462 drives the annular plate 463 to move downward, the annular plate 463 can drive the sampling barrel 44 to move downward through the plug rod 464, so that the sampling barrel 44 can move into the water body, and then accurately sample water at different depths; when the sampling is completed, the piston rod 462 drives the sampling barrel 44 to move upward through the annular plate 463, and the barrel unit 45 then sends the sampled sampling barrel 44 into the storage unit 43.

[0053] See also Fig.10 As shown, as a preferred technical solution of this embodiment, sealing rings are evenly arranged on the inner wall of the circular outlet, the inside of the sealing ring is filled with a metal layer, and the outer side of the sealing ring is tightly attached to the outer wall of the plug rod 464.

[0054] In the above technical solution, the sealing ring can effectively seal, so that when the sampling tube 44 moves up and down, the area inside the fixed frame 41 is always a closed area, preventing excess water from entering the fixed frame 41 through the circular outlet, thereby ensuring the accuracy of water sampling.

[0055] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A water quality detection sampling device, characterized in that: include: The housing (1) is a cylindrical hollow structure; as well as A floating body (2) is installed at the middle part of the outer side of the outer shell (1), and the floating body (2) is used to drive the outer shell (1) to float on the water surface; A filter frame (3) is mounted on the lower end of the outer side of the housing (1), and filter holes are evenly arranged on the filter frame (3). The filter frame (3) is used to filter floating objects on the upper layer of the water surface; A sampling assembly (4) is installed inside the housing (1), and the sampling assembly (4) is used to sample water quality at different depths in multiple areas one by one; The sampling assembly (4) comprises a fixed frame (41), a rotating member (42), a material storage unit (43), a sampling tube (44), a tube taking unit (45) and a pull-down unit (46). The fixed frame (41) is installed in the middle of the housing (1). The fixed frame (41) is in a cylindrical structure. An opening groove is provided on one side of the fixed frame (41). A circular outlet is provided at the lower end of the fixed frame (41). An annular groove is provided between the outer side of the fixed frame (41) and the inner wall of the housing (1). The rotating member (42) is installed at the lower end of the annular groove. The material storage unit (43) is installed at the upper end of the annular groove. The material storage unit (43) is removable and arranged, the lower end of the material storage unit (43) is plugged into and matched with the rotating member (42), sampling tubes (44) are evenly installed inside the material storage unit (43), a tube taking unit (45) is installed inside the open groove, and a pull-down unit (46) is installed at the lower end of the fixed frame (41), the tube taking unit (45) is used to pull the sampling tube (44) inside the material storage unit (43) into the open groove, and the pull-down unit (46) is used to pull the sampling tube (44) inside the open groove downward and sample water quality at different depths one by one; The material storage unit (43) comprises a rotating frame (431) and a limiting clamping column (432). The rotating frame (431) is arranged inside the annular groove. The rotating frame (431) is in a circular ring structure. The limiting clamping columns (432) are evenly arranged inside the rotating frame (431). Positioning grooves are arranged between adjacent limiting clamping columns (432). The sampling tube (44) is installed inside the positioning groove. The limiting clamping columns (432) are symmetrically arranged with arc grooves. An electromagnet is installed on the inner wall of the arc groove. The outer wall of the sampling tube (44) cooperates with the electromagnet. The sampling tube (44) comprises a fixed tube (441), a collecting tube (442) and a pressing mechanism (443); the fixed tube (441) is a cylindrical structure; the fixed tube (441) is matched with the circular outlet clearance; the fixed tube (441) is located inside the positioning groove; the fixed tube (441) is evenly provided with mounting grooves; the collecting tube (442) is installed in the mounting grooves; the fixing tube (441) is installed with a pressing mechanism (443); the pressing mechanism (443) is used to press and seal the upper end of the collecting tube (442); The barrel taking unit (45) comprises an electric slider (451) and a material taking frame (452), the inner wall of the opening groove is symmetrically provided with a slide groove, the electric slider (451) is installed in the slide groove, the material taking frame (452) is installed between the two electric sliders (451), one side of the material taking frame (452) is provided with an arc surface matching with the sampling barrel (44), and the inner concave surface of the material taking frame (452) is provided with an electromagnet 2 matching with the sampling barrel (44) by adsorption; The pull-down unit (46) comprises a piston chamber (461), a piston rod (462), an annular plate (463) and a plug-in rod (464); the piston chamber (461) is evenly arranged on the fixed frame (41); a piston rod (462) is arranged inside the piston chamber (461); an annular plate (463) is installed between the lower ends of the piston rod (462); a plug-in rod (464) is installed at the upper end of the annular plate (463); and the upper end of the plug-in rod (464) is located inside the circular outlet.

2. A water quality detection sampling device according to claim 1, characterized in that: The rotating member (42) is an electric turntable, on which positioning rods (421) are evenly arranged.

3. A water quality detection sampling device according to claim 1, characterized in that: The clamping mechanism (443) comprises a guide rod (4431), a connecting spring (4432), a cross rod (4433) and a clamping plate (4434); guide grooves are arranged on both sides of the fixed cylinder (441); guide rods (4431) are slidably arranged in the guide grooves; a cross rod (4433) is connected between the upper ends of the guide rods (4431); both ends of the cross rod (4433) protrude outward; connecting springs (4432) are evenly arranged on the guide rods (4431); a clamping plate (4434) is arranged at the upper end of the mounting groove; and both ends of the clamping plate (4434) are respectively mounted on the two guide rods (4431).

4. A water quality detection sampling device according to claim 1, characterized in that: The lower end of the sampling tube (44) is provided with a semicircular groove, and the inner wall of the semicircular groove is evenly provided with transversely arranged insertion holes.

5. A water quality detection sampling device according to claim 4, characterized in that: The diameter of the plug rod (464) is the same as that of the sampling tube (44). A semicircular plug rack is provided at the upper end of the plug rod (464). The plug rack is evenly provided with plug rods, which match with the sockets at the lower end of the sampling tube (44).

6. A water quality detection sampling device according to claim 1, characterized in that: Sealing rings are evenly arranged on the inner wall of the circular outlet, the interior of the sealing rings is filled with a metal layer, and the outer side of the sealing rings is in close contact with the outer wall of the plug rod (464).

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