Water environment sampling and detecting device

Abstract

The utility model relates to a water environment sampling and detecting device and belongs to the technical field of water quality detection. The base plate floats on the water surface, the detection box is located on the upper surface of the base plate, the supporting vertical rods are located on the lower surface of the base plate and used for installing sampling barrels, the detection box is fixedly connected to the upper surface of the base plate, and multiple sets of line holes are formed in one side of the detection box. A proper number of supporting vertical rods can be spliced according to actual conditions, so that the sampling device is suitable for sampling water bodies with different depths. And secondly, in the sampling process, the multiple groups of piston rods are controlled to synchronously ascend by the driving assembly, so that the sampling barrels at different positions can simultaneously sample water bodies with different water layer depths. Through mutual cooperation of the sampling barrel and the piston block, it can be ensured that water in the sampling barrel comes from a water layer with the preset depth, and therefore mixing of water in different water layers is effectively avoided. And the water quality sensor is arranged in the sampling barrel, so that the water body can be quickly detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to water quality detection technical field especially relates to a water environment sampling and detection device. BACKGROUND

[0002] Water quality detection refers to the process of analyzing and measuring the physical, chemical and biological properties of water bodies to assess whether the water quality meets environmental standards and ensure the health status and sustainable use of water bodies.

[0003] The existing water environment sampling and detection device has some deficiencies, first, the existing device needs to sample the water in batches and then pour into the detection cylinder for detection, the steps are more cumbersome, and the secondary transfer of water can cause cross contamination of water samples. Secondly, the existing device cannot realize the simultaneous sampling of different water layer depth water bodies, and can only perform single sampling operation of different water layer depth water bodies one by one, thereby further reducing the work efficiency. At the same time, when sampling water bodies of different depths, the lower end of the sampling cylinder is in an open state, which is easy to cause the phenomenon of upper layer water entering the sampling cylinder, thereby causing the mixing of upper and lower layer water bodies. This mixing will affect the representativeness of the water sample, and further affect the accuracy of the final detection result. SUMMARY

[0004] To solve the above technical problems, the utility model provides a water environment sampling and detection device. The technical scheme of the utility model is as follows:

[0005] The utility model provides a kind of water environment sampling and detection device, including the substrate floating on water surface, the detection box on the upper surface of substrate and multiple groups of support vertical pole for installing sampling cylinder on the lower surface of substrate, the detection box is fixedly connected on the upper surface of substrate, one side of the detection box is equipped with multiple groups of line hole, control panel is fixedly connected on the detection box, multiple groups of support vertical pole are vertically spliced and connected by bolt, the uppermost support vertical pole is fixedly connected on the lower surface of substrate by bolt, the outside of multiple groups of support vertical pole is all detachably fixedly connected with the fixing frame for fixing sampling cylinder, the fixing frame can slide on the outside of support vertical pole and be fixed by fixed bolt, the sampling cylinder is the combination of upper cylindrical body and lower inverted cone, water inlet is formed in the lower end of sampling cylinder, movable hole is formed in the upper surface of sampling cylinder, piston rod is slidably connected in the inside of movable hole, inverted cone type piston block is fixedly connected on the lower end of piston rod, the piston block is located in the inside of sampling cylinder and is slidably connected between the piston block and sampling cylinder, cavity two for installing water quality sensor is formed in the inside of piston block, the upper end of water quality sensor is fixedly connected with connecting cable, the end of connecting cable away from water quality sensor is fixedly inserted in line hole, cavity one for accommodating connecting cable is formed in the inside of piston rod, driving assembly for driving multiple groups of piston rod to move up and down synchronously is connected on the substrate.

[0006] Optionally, the driving assembly includes multiple groups of fixed ring seats, multiple groups of the fixed ring seats are fixedly sleeved on the outer sides of the upper ends of the corresponding piston rods and above the corresponding sampling cylinders by bolts, the left and right sides of the fixed ring seat are symmetrically fixed with fixed side plates, the interiors of the two groups of fixed side plates are threadedly connected with threaded rods, the left and right sides of the sampling cylinder and below the fixed side plates are symmetrically fixed with support side plates, the lower ends of the threaded rods penetrate the support side plates and are rotatably connected therebetween, synchronous rotation of the left and right groups of threaded rods can drive the corresponding piston rods to move up and down, the upper and lower groups of threaded rods on the same side are connected by connecting pieces, the overall length of the connecting piece can be automatically adjusted with the relative distance between the upper and lower groups of sampling cylinders, the two groups of threaded rods on the uppermost side are connected with the two groups of connecting rods below the substrate by the two groups of connecting pieces, the upper surface of the substrate and one side of the detection box are connected with a synchronizer for driving the two groups of connecting rods to rotate synchronously.

[0007] Optionally, the connecting piece comprises a group of outer rods, two groups of secondary rods and two groups of inner rods, the two groups of secondary rods are respectively slidably connected to the upper and lower ends of the inner part of the outer rods, the two groups of inner rods are respectively slidably connected to the inner part of the two groups of secondary rods and away from one end of the outer rods, the inner wall of the outer rod is symmetrically provided with a limiting groove one on both sides, the outer wall of the secondary rod is symmetrically provided with a limiting block one slidably matched with the limiting groove one, the inner wall of the secondary rod is symmetrically provided with a limiting groove two, the outer wall of the inner rod is symmetrically provided with a limiting block two slidably matched with the limiting groove two, the upper and lower ends of the threaded rod are both fixedly connected with connecting heads, the connecting heads and the adjacent inner rods are connected by connecting sleeves through bolts, the upper inner rod in the connecting piece is connected with the connecting rod through bolts by the connecting sleeve.

[0008] Optionally, the synchronizing piece comprises two groups of shaft rods, the two groups of shaft rods are both penetrated through the base plate and rotationally connected between the two groups, the two groups of connecting rods are respectively fixedly connected to the lower ends of the two groups of shaft rods, the outer sides of the two groups of shaft rods and above the base plate are fixedly sleeved with sprockets, the outer sides of the two groups of sprockets are jointly meshed with a chain, the upper end of one group of the shaft rods is fixedly connected with a motor, the motor is fixed between the base plate, the outer side of the synchronizing piece is covered with a protective shell, the protective shell is detachably connected with the base plate.

[0009] Optionally, the upper surface of the base plate is fixedly connected with ear seats on both sides, the inner sides of the two groups of ear seats are jointly hingedly connected with a handle.

[0010] Optionally, a plurality of groups of fixing holes are vertically and equidistantly provided on the support vertical rod, the fixing frame comprises a main fixing ring and a secondary fixing ring, the main fixing ring is fixedly connected with an ear plate, the screw rod end of the fixing bolt is penetrated through the ear plate and threadedly connected in the fixing hole at the corresponding position, the secondary fixing ring is fixedly sleeved on the outer side of the sampling cylinder, the main fixing ring and the secondary fixing ring are connected through a connecting frame.

[0011] Optionally, the water inlet is fixedly connected with an elastic sealing sheet for limiting the flow of water.

[0012] Optionally, the water inlet is detachably fixedly connected with a filter cage, the outer side of the filter cage is threadedly connected with a sealing cover.

[0013] Optionally, the outer side wall of the sampling cylinder is fixedly embedded with a transparent observation window.

[0014] All the optional technical solutions can be combined arbitrarily, and the structure after combination is not described in detail.

[0015] By the above scheme, the beneficial effects of the present application are as follows:

[0016] 1. This utility model allows for the assembly of an appropriate number of support rods to accommodate water sampling at different depths, effectively improving the device's adaptability. Secondly, multiple adjustable sampling cylinders are installed on the outer side of the support rods, allowing operators to adjust the relative positions of these cylinders to the support rods according to the required sampling depth. During sampling, the drive assembly controls the synchronous rise of multiple piston rods, enabling simultaneous sampling of water at different depths from different positions. This avoids the cumbersome steps of batch sampling in traditional methods, significantly improving work efficiency.

[0017] 2. Through the interaction of the sampling tube and the piston block, the water inlet at the lower end of the sampling tube is sealed by the piston block before the sampling tube reaches the predetermined depth, thus preventing water from the upper layer from entering the sampling tube. When the sampling tube reaches the predetermined depth, the piston block moves upward to extract the water sample. This ensures that the water in the sampling tube comes from the predetermined depth, effectively avoiding the mixing of water from different layers and guaranteeing the accuracy of subsequent test results.

[0018] 3. By incorporating a water quality sensor within the sampling tube, rapid water quality detection can be achieved. During sampling and testing, there is no need for secondary transfer of the sampled water, resulting in more accurate test results. Furthermore, the operation is simple and convenient, significantly improving testing efficiency.

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall appearance structure of the water environment sampling and detection device provided by this utility model;

[0021] Figure 2 Schematic diagram of the exploded structure of the water environment sampling and detection device provided by this utility model Figure One ;

[0022] Figure 3 Schematic diagram of the exploded structure of the water environment sampling and detection device provided by this utility model Figure Two ;

[0023] Figure 4 This is a schematic diagram of the structure of the supporting vertical rod, the fixing frame, the sampling cylinder, and some components of the driving assembly in this utility model.

[0024] Figure 5 This is a cross-sectional view of the sampling tube, water quality sensor, and drive assembly used in this utility model.

[0025] Figure 6 This is a schematic diagram of the structure of the substrate, detection box and synchronization component in this utility model.

[0026] Figure 7 This is a schematic diagram of the structure of the sampling cylinder and piston rod in this utility model.

[0027] Figure 8 This is an exploded structural diagram of the connector in this utility model.

[0028] Numbered in the diagram: 1. Base plate; 11. Ear seat; 12. Handle; 2. Detection box; 21. Wire hole; 22. Control panel; 3. Supporting vertical rod; 31. Fixing hole; 4. Fixing frame; 41. Main fixing ring; 411. Ear plate; 412. Fixing bolt; 42. Connecting frame; 43. Secondary fixing ring; 5. Sampling cylinder; 51. Water inlet; 511. Filter cage; 512. Sealing cover; 52. Movable hole; 53. Observation window; 54. Supporting side plate; 6. Piston rod; 60. Cavity 1; 61. Piston block; 611. Cavity 2; 7. 71. Water quality sensor; 82. Connecting cable; 93. Drive assembly; 10. Fixing ring seat; 11. Fixing side plate; 12. Threaded rod; 13. Connector; 14. Connecting piece; 15. Outer rod; 16. Limiting groove one; 17. Secondary rod; 18. Limiting block one; 19. Limiting groove two; 10. Inner rod; 11. Limiting block two; 12. Connecting sleeve; 13. Synchronizing component; 14. Shaft; 15. Sprocket; 16. Connecting rod; 17. Chain; 18. Motor; 19. Protective shell. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0030] Please see Figures 1-8This utility model provides a water environment sampling and testing device, including a substrate 1 floating on the water surface, a testing box 2 located on the upper surface of the substrate 1, and multiple sets of supporting vertical rods 3 located on the lower surface of the substrate 1 for mounting sampling cylinders 5. The testing box 2 is fixedly connected to the upper surface of the substrate 1. Multiple sets of wire holes 21 are provided on one side of the testing box 2. A control panel 22 is fixedly connected to the testing box 2. The multiple sets of supporting vertical rods 3 are vertically spliced ​​and connected by bolts. The uppermost supporting vertical rod 3 is fixedly connected to the lower surface of the substrate 1 by bolts. The outer sides of the multiple sets of supporting vertical rods 3 are detachably fixedly connected to a fixing frame 4 for fixing the sampling cylinders 5. The fixing frame 4 can slide relative to the outer side of the supporting vertical rods 3 and is fixed by fixing bolts 412. The sampling cylinder 5 is a cylinder at the top and an inverted cone at the bottom. The sampling cylinder 5 is assembled from various parts. The lower end of the sampling cylinder 5 has a water inlet 51, and the upper surface of the sampling cylinder 5 has a movable hole 52. A piston rod 6 is slidably connected inside the movable hole 52. The lower end of the piston rod 6 is fixedly connected to an inverted conical piston block 61. The piston block 61 is located inside the sampling cylinder 5 and the two are slidably connected. The interior of the piston block 61 has a cavity 611 for installing a water quality sensor 7. The upper end of the water quality sensor 7 is fixedly connected to a connecting cable 71. The end of the connecting cable 71 away from the water quality sensor 7 is fixedly inserted into the wire hole 21. The interior of the piston rod 6 has a cavity 60 for accommodating the connecting cable 71. A drive assembly 8 for driving multiple sets of piston rods 6 to move up and down synchronously is connected to the base plate 1.

[0031] This invention allows for the assembly of an appropriate number of support rods 3 to accommodate water sampling at different depths, effectively improving the device's adaptability. Secondly, multiple adjustable sampling cylinders 5 are installed on the outer side of the support rods 3, allowing operators to adjust the relative positions of the sampling cylinders 5 to the support rods 3 according to the required sampling depth. During sampling, the drive assembly 8 controls the synchronous rise of multiple piston rods 6, enabling simultaneous sampling of water at different depths by the sampling cylinders 5 at different positions. This avoids the cumbersome steps of batch sampling in traditional methods, significantly improving work efficiency.

[0032] Through the cooperation of the sampling cylinder 5 and the piston block 61, when the sampling cylinder 5 has not reached the upper layer of the predetermined depth, the water inlet 51 at the lower end of the sampling cylinder 5 is sealed by the piston block 61, thus preventing upper layer water from entering the sampling cylinder 5. When the sampling cylinder 5 reaches the predetermined depth of the water layer, the piston block 61 can be moved upward to extract water samples. This ensures that the water in the sampling cylinder 5 comes from the water layer of the predetermined depth, effectively avoiding the mixing of water from different layers and ensuring the accuracy of subsequent test results. Specifically, the piston block 61 is set as an inverted cone shape, which matches the inverted cone structure of the lower half of the sampling cylinder 5. Before sampling, the piston block 61 is moved to the lower position of the sampling cylinder 5, at which time the water inlet 51 of the sampling cylinder 5 will be in a closed state. During the process of placing the sampling cylinder 5 into the water layer, the upper layer of water will not be able to enter the sampling cylinder 5. Once the sampling cylinder 5 is in place, the driving assembly 8 drives multiple sets of piston rods 6 to move the piston block 61 upward, thereby extracting water from different water depths into the sampling cylinders 5 at different locations.

[0033] By embedding a water quality sensor 7 within the sampling cylinder 5, rapid water quality detection can be achieved. Once water is drawn into the sampling cylinder 5, the water quality sensor 7 can perform real-time monitoring (precisely monitoring various water parameters such as temperature, pH value, and dissolved oxygen content). The results are then analyzed by the detection chamber 2. During sampling and testing, there is no need for secondary transfer of the sampled water, resulting in more accurate results. Furthermore, the operation is simple and convenient, significantly improving testing efficiency.

[0034] Furthermore, the drive assembly 8 includes multiple sets of fixing ring seats 81. These fixing ring seats 81 are respectively bolted and sleeved on the outer side of the upper end of the piston rod 6 at corresponding positions and above the sampling cylinder 5 at corresponding positions. Fixing side plates 82 are symmetrically fixed on the left and right sides of the fixing ring seats 81. Threaded rods 83 are threaded into the interior of both sets of fixing side plates 82. Supporting side plates 54 are symmetrically fixed on the left and right sides of the sampling cylinder 5 and directly below the fixing side plates 82. The lower ends of the threaded rods 83 penetrate the supporting side plates 54 and are rotatably connected to them. The synchronous rotation of the threaded rod 83 can drive the piston rod 6 at the corresponding position to move up and down. The upper and lower sets of threaded rods 83 located on the same side are connected by a connector 84. The overall length of the connector 84 can be adjusted by changing the relative distance between the upper and lower sets of sampling cylinders 5. The two uppermost sets of threaded rods 83 are connected to two sets of connecting rods 853 located below the substrate 1 through two sets of connecting rods 84 respectively. A synchronizing element 85 for driving the two sets of connecting rods 853 to rotate synchronously is connected to the upper surface of the substrate 1 and on the side of the detection box 2.

[0035] Specifically, when it is necessary to drive multiple sets of piston rods 6 to rise synchronously, the two sets of connecting rods 853 can be driven to rotate synchronously through the synchronizing member 85. The connecting rods 853 drive multiple sets of threaded rods 83 to rotate synchronously through the connecting member 84, so that the fixed side plate 82 drives the piston rods 6 and piston blocks 61 to rise through the fixed ring seat 81, thereby drawing water into the sampling cylinder 5.

[0036] Furthermore, the connector 84 includes a set of outer rods 841, two sets of secondary rods 842, and two sets of inner rods 843. The two sets of secondary rods 842 are slidably connected to the upper and lower ends of the outer rods 841, respectively. The two sets of inner rods 843 are slidably connected to the ends of the two sets of secondary rods 842 that are away from the outer rods 841. The inner walls of the outer rods 841 are symmetrically provided with limiting grooves 8411 on both sides. The outer walls of the secondary rods 842 are symmetrically fixed with limiting blocks 8421 that slide and cooperate with the limiting grooves 8411. The inner wall of 42 is symmetrically provided with limiting grooves 8422 on both sides. The outer wall of the inner rod 843 is symmetrically provided with limiting blocks 8431 that slide in cooperation with the limiting grooves 8422. The upper and lower ends of the threaded rod 83 are fixedly connected with connectors 831. The connectors 831 and the adjacent inner rods 843 are connected by bolts through connecting sleeves 844. The upper inner rod 843 in the uppermost connector 84 is connected to the connecting rod 853 by bolts through connecting sleeves 844.

[0037] Specifically, due to the uncertainty of the position of the sampling cylinder 5, it needs to be adjusted at any time according to the required sampling depth. When the relative distance between the upper and lower sampling cylinders 5 changes, the length of the connector 84 used to connect the upper and lower threaded rods 83 on the same side needs to be changed accordingly. The outer rod 841 and the secondary rod 842, and the secondary rod 842 and the inner rod 843 can slide relative to each other, which has high flexibility and adjustability, and can be adjusted according to the change of the relative distance between the sampling cylinders 5. Through the mutual cooperation of the first limiting groove 8411 and the first limiting block 8421, and the mutual cooperation of the second limiting groove 8422 and the second limiting block 8431, the outer rod 841 and the secondary rod 842, and the secondary rod 842 and the inner rod 843 can only slide in the vertical direction, thereby ensuring the synchronous transmission of rotation. In addition, the first limiting groove and the second limiting groove 8422 respectively limit the first limiting block 8421 and the second limiting block 8431, preventing them from exceeding the sliding stroke. Secondly, the connector 84 and the threaded rod 83 and the connecting rod 853 all adopt a bolt-detachable structure, which makes it easy for operators to assemble and disassemble according to the actual situation.

[0038] Furthermore, the synchronizing component 85 includes two sets of shafts 851, both sets of shafts 851 passing through the base plate 1 and rotatably connected to each other. Two sets of connecting rods 853 are respectively fixedly connected to the lower ends of the two sets of shafts 851. Sprockets 852 are fixedly sleeved on the outer side of the two sets of shafts 851 and above the base plate 1. Chains 854 are fitted together on the outer side of the two sets of sprockets 852. A motor 855 is fixedly connected to the upper end of one set of shafts 851. The motor 855 is fixed to the base plate 1. A protective shell 856 is provided on the outer side of the synchronizing component 85. The protective shell 856 is detachably connected to the base plate 1.

[0039] Specifically, the motor 855 is controlled by the control panel 22. The output shaft of the motor 855 drives one set of shafts 851 to rotate. One set of shafts 851 drives the sprockets 852 sleeved on its outer side to rotate synchronously. Under the action of the chain 854, the other set of sprockets 852 rotates accordingly, thereby driving the other set of shafts 851 to rotate, and then driving the two sets of connecting rods 853 to rotate synchronously.

[0040] Furthermore, ear seats 11 are fixedly connected to both sides of the upper surface of the substrate 1, and handles 12 are hinged to the inner sides of the two sets of ear seats 11.

[0041] Specifically, the operator can easily extract and operate the device through the handle 12, so as to flexibly control the position and angle of the substrate 1 during the sampling and testing process, thereby ensuring the accuracy of sampling and the efficiency of testing.

[0042] Furthermore, multiple sets of fixing holes 31 are vertically and equidistantly opened on the support rod 3. The fixing frame 4 includes a main fixing ring 41 and a secondary fixing ring 43. A lug plate 411 is fixedly connected to the main fixing ring 41. The screw end of the fixing bolt 412 passes through the lug plate 411 and is threaded into the fixing hole 31 at the corresponding position. The secondary fixing ring 43 is fixedly sleeved on the outside of the sampling cylinder 5. The main fixing ring 41 and the secondary fixing ring 43 are connected by a connecting frame 42.

[0043] Specifically, the position of the sampling tube 5 can be adjusted according to the required depth of the water layer being sampled. After adjustment, simply pass the fixing bolt 412 through the ear plate 411 and screw it into the corresponding fixing hole 31. The operation is simple and convenient.

[0044] Furthermore, an elastic sealing plate is fixedly connected at the water inlet 51 to restrict the flow of water.

[0045] Specifically, the structure of the elastic sealing sheet is similar to the leak-proof and flow-limiting structure of some beverage bottle openings, employing a principle similar to that of heart valves. When no force is applied, the elastic sealing sheet comes together in a closed state. Upon application of external force, the elastic sealing sheet opens, forming a channel. In this invention, when the piston block 61 moves upward to extract water samples, the gap in the elastic sealing sheet automatically opens due to the suction force of the piston block 61, allowing water to flow into the sampling cylinder 5. When the piston block 61 stops moving, the elastic sealing sheet automatically rebounds and returns to a closed state after the external force is removed, effectively preventing the water sample in the sampling cylinder 5 from leaking out.

[0046] Furthermore, a filter cage 511 is detachably fixedly connected to the water inlet 51, and a sealing cap 512 is threadedly connected to the outside of the filter cage 511.

[0047] Specifically, the purpose of the filter cage 511 is to prevent large particles of debris and impurities in the water from entering the sampling cylinder 5. Simultaneously, when the piston block 61 is located at the lower part of the sampling cylinder 5, the filter cage 511 also protects the head of the water quality sensor 7 at the lower end of the piston block 61. The purpose of the sealing cap 512 is to seal the inlet 51. When the water sample needs to be taken back after sampling, the sealing cap 512 can be screwed onto the outside of the filter cage 511, thereby completely sealing the inlet 51.

[0048] Furthermore, a transparent observation window 53 is fixedly embedded in the outer wall of the sampling tube 5.

[0049] Specifically, the operator can observe the water sample inside the sampling tube 5 through the observation window 53.

[0050] Working Principle: First, assemble an appropriate number of support rods 3 according to the water depth. Second, install multiple sampling cylinders 5 at appropriate positions on the outside of the support rods 3 according to the required water depth, and secure them with fixing bolts 412. Third, before the sampling cylinder 5 enters the water, control the piston rod 6 downwards via the control panel 22, causing the piston block 61 to block the lower inlet 51 of the sampling cylinder 5. Fourth, place the base plate 1 on the water surface using the handle 12, at which point the support rods 3 and sampling cylinders 5 are submerged in the water. Sampling then begins. Control the piston rod 6 upwards via the control panel 22, which in turn moves the piston block 61 upwards, drawing water from different depths into the corresponding sampling cylinders 5. Fifth, the built-in water quality sensor 7 detects the water sample and transmits the detection information to the detection chamber 2 for analysis, thus achieving rapid detection. Step 6: After the test is completed, control the piston rod 6 to move down and drain the water from the sampling cylinder 5, thereby emptying the sampling cylinder 5 and preparing it for the next sampling or other operations.

[0051] It should be noted that the water quality sensor 7 and motor 855 mentioned in this article are electrically connected to the detection box 2, and both are existing technologies.

[0052] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An apparatus for sampling and detecting a water environment, characterized by: Including the substrate (1) floating on the water surface, the detection box (2) on the upper surface of the substrate (1) and a plurality of groups of support vertical rods (3) on the lower surface of the substrate (1) for installing the sampling cylinder (5), the detection box (2) is fixedly connected to the upper surface of the substrate (1), one side of the detection box (2) is provided with a plurality of wire holes (21), the control panel (22) is fixedly connected to the detection box (2), a plurality of the support vertical rods (3) are vertically spliced and connected by bolts, the uppermost support vertical rod (3) is fixedly connected to the lower surface of the substrate (1) by bolts, a plurality of the support vertical rods (3) are fixedly connected with the fixing frame (4) for fixing the sampling cylinder (5) on the outer side, the fixing frame (4) can slide relatively on the outer side of the support vertical rod (3) and be fixed by the fixing bolt (412), the sampling cylinder (5) is a combination of an upper cylindrical body and a lower inverted conical body, a water inlet (51) is formed in the lower end of the sampling cylinder (5), a movable hole (52) is formed in the upper surface of the sampling cylinder (5), a piston rod (6) is slidably connected in the movable hole (52), an inverted conical piston block (61) is fixedly connected to the lower end of the piston rod (6), the piston block (61) is located in the interior of the sampling cylinder (5) and is slidably connected thereto, a cavity two (611) for installing a water quality sensor (7) is formed in the interior of the piston block (61), a connecting cable (71) is fixedly connected to the upper end of the water quality sensor (7), one end of the connecting cable (71) away from the water quality sensor (7) is fixedly inserted into the wire hole (21), a cavity one (60) for accommodating the connecting cable (71) is formed in the interior of the piston rod (6), and the substrate (1) is connected with a driving assembly (8) for driving a plurality of piston rods (6) to move synchronously up and down.

2. The water environment sampling and detecting device according to claim 1, wherein, The driving assembly (8) comprises a plurality of fixed ring seats (81), a plurality of fixed ring seats (81) are respectively fixed on the outer side of the upper end of the piston rod (6) in the corresponding position and above the sampling cylinder (5) in the corresponding position, the left and right sides of the fixed ring seat (81) are symmetrically and fixedly provided with a fixed side plate (82), the interiors of the two fixed side plates (82) are threadedly connected with threaded rods (83), the left and right sides of the sampling cylinder (5) and below the fixed side plate (82) are symmetrically and fixedly provided with a supporting side plate (54), the lower end of the threaded rod (83) penetrates through the supporting side plate (54) and is rotatably connected therebetween, synchronous rotation of the left and right groups of threaded rods (83) can drive the piston rod (6) in the corresponding position to move up and down, the upper and lower groups of threaded rods (83) located on the same side are connected through connecting pieces (84), the overall length of the connecting piece (84) can be automatically adjusted according to the relative distance between the upper and lower groups of sampling cylinders (5), the uppermost two groups of threaded rods (83) are respectively connected with two connecting rods (853) below the base plate (1) through two connecting pieces (84), and the upper surface of the base plate (1) and one side of the detection box (2) are connected with a synchronizing piece (85) for driving the two connecting rods (853) to synchronously rotate.

3. The water environment sampling and detecting device according to claim 2, wherein, The connecting piece (84) comprises a group of outer rods (841), two groups of secondary rods (842) and two groups of inner rods (843), two groups of secondary rods (842) are respectively and slidably connected at the upper and lower ends of the interiors of the outer rods (841), two groups of inner rods (843) are respectively and slidably connected at the interiors of the two groups of secondary rods (842) and away from one end of the outer rod (841), the inner walls of the outer rods (841) are symmetrically and provided with limiting grooves one (8411), the outer walls of the secondary rods (842) are symmetrically and fixedly provided with limiting blocks one (8421) matched with the limiting grooves one (8411), the inner walls of the secondary rods (842) are symmetrically and provided with limiting grooves two (8422), the outer walls of the inner rods (843) are symmetrically and fixedly provided with limiting blocks two (8431) matched with the limiting grooves two (8422), the upper and lower ends of the threaded rods (83) are all fixedly connected with connecting heads (831), the connecting heads (831) and the adjacent inner rods (843) are connected through connecting sleeves (844) by bolts, the upper inner rods (843) in the uppermost connecting piece (84) are connected with the connecting rods (853) by bolts through the connecting sleeves (844).

4. The water environment sampling and detecting device according to claim 2, wherein, The synchronous part (85) comprises two groups of shaft rods (851), both of which penetrate the base plate (1) and are rotationally connected between each other, two groups of connecting rods (853) are fixedly connected to the lower ends of the two groups of shaft rods (851) respectively, chain wheels (852) are fixedly sleeved to the outer sides of the two groups of shaft rods (851) and above the base plate (1), the outer sides of the two groups of chain wheels (852) are commonly meshingly sleeved with a chain (854), the upper end of one group of shaft rods (851) is fixedly connected with a motor (855), the motor (855) is fixed between the base plate (1), the outer side of the synchronous part (85) is sleeved with a protective shell (856), and the protective shell (856) is detachably connected between the base plate (1).

5. The water environment sampling and detecting device according to claim 1, wherein, The upper surface of the base plate (1) is fixedly connected with an ear seat (11) on both sides, and the inner sides of the two groups of ear seats (11) are commonly hingedly connected with a handle (12).

6. The water environment sampling and detecting device according to claim 1, wherein, A plurality of groups of fixing holes (31) are vertically and equidistantly formed on the support vertical rod (3), the fixing frame (4) comprises a main fixing ring (41) and a secondary fixing ring (43), the ear plate (411) is fixedly connected to the main fixing ring (41), the screw rod end of the fixing bolt (412) penetrates the ear plate (411) and is threadedly connected in the fixing hole (31) at the corresponding position, the secondary fixing ring (43) is fixedly sleeved outside the sampling cylinder (5), and the main fixing ring (41) and the secondary fixing ring (43) are connected through the connecting frame (42).

7. The water environment sampling and detecting device according to claim 1, wherein, An elastic sealing sheet for limiting water flow is fixedly connected at the water inlet (51).

8. The water environment sampling and detecting device according to claim 7, characterized in that, A filter cage (511) is detachably fixedly connected at the water inlet (51), and a sealing cover (512) is threadedly connected to the outer side of the filter cage (511).

9. The water environment sampling and detecting device according to claim 1, wherein, A transparent observation window (53) is fixedly embedded to the outer side wall of the sampling cylinder (5).

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