Water quality detection mechanism for river

Abstract

The application relates to a water quality detection mechanism for a river channel, which comprises a box body, a support frame is installed on the top of the box body, a photovoltaic panel is installed on the top of the support frame, an annular mounting seat is installed on the outer wall of the box body, a floating plate is installed in the annular groove of the annular mounting seat, a protection mechanism is arranged, first adjusting components and second adjusting components are arranged in the protection mechanism, the first motor in the first adjusting components drives the first protection cover and the second protection cover to move towards each other or away from each other, the opening and closing control of the first protection cover and the second protection cover is realized, so that the detection components are effectively protected when the equipment is not used, the second motor in the second adjusting components drives the detection frame to move up and down, the lifting adjustment of the detection structure is realized, the water quality sensor can accurately reach different depths of water bodies for sampling detection, and the flexibility and precision of detection are improved.

Description

Technical Field

[0001] This invention relates to the field of water quality testing technology, and in particular to a water quality testing device for rivers. Background Technology

[0002] With the acceleration of industrialization and the improvement of urbanization, the problem of river water pollution has become increasingly prominent. Water quality deterioration not only threatens the balance of aquatic ecosystems, but also affects the safety of drinking water for residents and the quality of water used for industrial and agricultural production. Therefore, it is essential to carry out routine and high-precision river water quality monitoring.

[0003] Existing river water quality testing equipment is difficult to comprehensively cover the water quality of different areas and depths in the river during use. Furthermore, the testing components, which are submerged in water for a long time, lack effective protective structures and are easily entangled by underwater debris and aquatic plants or damaged by water flow, resulting in decreased testing accuracy and affecting the continuity and reliability of data. Summary of the Invention

[0004] To address the problems mentioned in the background section, the present invention provides a water quality testing device for rivers.

[0005] The water quality testing device for rivers provided by this invention adopts the following technical solution:

[0006] A water quality testing device for rivers includes a housing, a support frame mounted on the top of the housing, a photovoltaic panel mounted on the top of the support frame, an annular mounting seat mounted on the outer wall of the housing, a float plate mounted in the annular groove of the annular mounting seat, a protective mechanism mounted on the bottom of the housing, and a testing structure mounted on the bottom of the housing.

[0007] The protective mechanism includes a first protective cover and a second protective cover installed at the bottom of the box. The first protective cover and the second protective cover are symmetrically distributed at the bottom of the box. A first telescopic cover and a second telescopic cover are slidably installed in the internal movable cavity of the first protective cover and the second protective cover. The first telescopic cover and the second telescopic cover pass through the openings opened at the bottom of the first protective cover and the second protective cover. A plurality of first row rods and second row rods are installed at equal intervals at the bottom of the first telescopic cover and the second telescopic cover. The protective mechanism is also provided with a first adjustment component and a second adjustment component.

[0008] The detection structure includes a detection frame installed between a first protective cover and a second protective cover. Two fixed rods are fixedly installed inside the detection frame. Several movable plates are installed on the two fixed rods. Detection components are installed at the bottom of the several movable plates. A third adjustment component is also installed on the top of the detection frame to drive the detection components to adjust at equal intervals.

[0009] Preferably, the first adjustment component includes a symmetrical first mounting slot and a second mounting slot opened at the bottom of the housing. A first sliding rod is installed inside the first mounting slot, and a bidirectional lead screw is installed inside the second mounting slot. One end of the bidirectional lead screw passes through a through hole opened at one end of the inner wall of the second mounting slot and enters a placement cavity opened at the bottom of the housing. One end of the bidirectional lead screw is also connected to the output end of a first motor installed inside the placement cavity. A waterproof sealing seat is installed on one side of the placement cavity. A symmetrical first movable seat is adapted to be installed on the bidirectional lead screw. The first movable seat is connected to the top of the first protective cover and the second protective cover. A symmetrical first slider is also installed on the top of the first protective cover and the second protective cover. The first slider is adapted to the first sliding rod.

[0010] Preferably, the second adjustment assembly includes a second slide rod and a second lead screw installed at the bottom of the housing. One end of the second lead screw passes into the housing and is connected to a second motor installed inside. A second movable seat is adapted to be installed on the second lead screw. A second slider is slidably installed on the second slide rod. A detection frame is fixedly connected between the second movable seat and the second slider. A fixed frame is installed at the bottom of the detection frame. A first telescopic plate and a second telescopic plate are fixedly installed on both sides of the fixed frame. The other end of the first telescopic plate is connected to the inner wall of one side of the first telescopic cover, and the other end of the second telescopic plate is connected to the inner wall of one side of the second telescopic cover.

[0011] Preferably, the detection component includes a fixed base installed at the bottom of the movable plate, a water quality sensor installed at the bottom of the fixed base, a wedge block installed at the top of the fixed base, the wedge block being adapted and engaged with a wedge groove provided at the bottom of the movable plate, and a fixing hole communicating with one side of the movable plate, wherein a fastening screw is inserted into the fixing hole.

[0012] Preferably, the bottom of the mounting base is further equipped with a protective component for protecting the water quality sensor. The protective component includes a symmetrical first protective mesh frame and a second protective mesh frame installed at the bottom of the mounting base. The first and second protective mesh frames cover the outside of the water quality sensor. Symmetrical T-shaped blocks are installed on the top of the first and second protective mesh frames. The T-shaped blocks are adapted to the T-shaped slots opened at both ends of the mounting base. Insert blocks are also installed on both sides of the first protective mesh frame. The insert blocks are inserted into the fixing frames installed on both sides of the second protective mesh frame and are locked and fixed by fixing screws in the corresponding through holes on the fixing frames of the insert blocks.

[0013] Preferably, the third adjustment component includes a sealing cover installed on the top of the testing frame, an electric telescopic rod installed inside the sealing cover, a transmission plate connected to the telescopic end of the electric telescopic rod, the transmission plate sliding in a through groove opened on the testing frame, and the other end fixedly connected to a movable plate near one edge of a fixed rod. Two first movable blocks are rotatably mounted on a shaft provided at one end of a movable plate fixedly installed at the middle section of the fixed rod, and the two ends of the two first movable blocks are respectively connected to one end of a second movable block installed on an adjacent movable plate.

[0014] In summary, the present invention has the following beneficial technical effects:

[0015] 1. This invention includes a protective mechanism comprising a first adjustment component and a second adjustment component. A first motor in the first adjustment component drives the first and second protective covers to move towards or away from each other, controlling their opening and closing. This effectively protects the detection components when the equipment is not in use. A second motor in the second adjustment component drives the detection frame to move up and down, adjusting the height of the detection structure and ensuring the water quality sensor can accurately reach different depths in the water for sampling and detection, improving the flexibility and accuracy of the detection. Simultaneously with the up-and-down movement of the detection frame, the first and second telescopic covers rise and fall synchronously under the influence of the first and second telescopic plates. This ensures that the first and second telescopic covers, along with the first and second rows of rods, always protect the bottom of the detection frame, effectively preventing underwater foreign objects from interfering with or damaging the detection frame and water quality sensor.

[0016] 2. This invention features a detection structure comprising a detection component, a protective component, and a third adjustment component. The electric telescopic rod in the third adjustment component drives a transmission plate, causing a moving plate to slide along a fixed rod. This allows two sets of first and second movable blocks to expand or retract in tandem, enabling multiple water quality sensors to expand or retract simultaneously in different water level areas, improving detection coverage and data accuracy. The protective component's insert block engages with the fixed frame, and a fixing screw passes through a through-hole for locking, ensuring the first and second protective mesh frames completely cover the water quality sensors. This effectively blocks contact interference from aquatic plants, silt, and other suspended matter. Simultaneously, the wedge-shaped block and wedge-shaped groove interlocking structure allows for quick assembly and disassembly of the detection component, facilitating maintenance and replacement. The fastening screws further ensure connection stability, preventing loosening due to water flow impact. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a water quality testing mechanism for rivers according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the bottom structure of the box in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram showing the disassembled bottom protection mechanism of the box in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the first adjustment component in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the second adjustment component in an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the detection structure in an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram showing the disassembly of the bottom structure of the movable plate in an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Support frame; 3. Photovoltaic panel; 4. Annular mounting base; 5. Floating plate; 6. First protective cover; 7. Second protective cover; 8. First mounting groove; 9. Second mounting groove; 10. First sliding rod; 11. Bidirectional lead screw; 12. Placement cavity; 13. First motor; 14. Waterproof sealing seat; 15. First movable seat; 16. First slider; 17. Second sliding rod; 18. Second lead screw; 19. Second motor; 20. Detection frame; 21. Fixing frame; 22. First telescopic plate; 23. Second telescopic plate; 24. First telescopic... 25. Second telescopic cover; 26. First row of rods; 27. Second row of rods; 28. Fixed rod; 29. ​​Moving plate; 30. Fixed seat; 31. Water quality sensor; 32. Wedge block; 33. Wedge groove; 34. Fixing hole; 35. Fastening screw; 36. Sealing cover; 37. Electric telescopic rod; 38. Transmission plate; 39. Through groove; 40. First movable block; 41. Second movable block; 42. First protective net frame; 43. Second protective net frame; 44. T-shaped block; 45. T-shaped groove; 46. Insert block; 47. Fixed frame; 48. Fixed screw. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 —7. The present invention will be described in further detail.

[0026] This invention discloses a water quality testing mechanism for rivers, comprising a housing 1, a support frame 2 mounted on the top of the housing 1, a photovoltaic panel 3 mounted on the top of the support frame 2, an annular mounting base 4 mounted on the outer wall of the housing 1, a float 5 mounted in the annular groove of the annular mounting base 4, a protective mechanism mounted on the bottom of the housing 1, and a testing structure also mounted on the bottom of the housing 1; the protective mechanism includes a first protective cover 6 and a second protective cover 7 mounted on the bottom of the housing 1, the first protective cover 6 and the second protective cover 7 being symmetrically distributed on the bottom of the housing 1, and a first telescopic cover 24 and a second telescopic cover 25 slidably mounted in the internal movable cavities of the first protective cover 6 and the second protective cover 7. A telescopic cover 24 and a second telescopic cover 25 pass through the openings at the bottom of the first protective cover 6 and the second protective cover 7. Several first row rods 26 and second row rods 27 are installed at equal intervals at the bottom of the first telescopic cover 24 and the second telescopic cover 25. The protective mechanism is also equipped with a first adjustment component and a second adjustment component. The detection structure includes a detection frame 20 installed between the first protective cover 6 and the second protective cover 7. Two fixed rods 28 are fixedly installed inside the detection frame 20. Several movable plates 29 are installed on the two fixed rods 28. Detection components are installed at the bottom of the movable plates 29. A third adjustment component is also installed on the top of the detection frame 20 to drive the detection components to adjust at equal intervals.

[0027] refer to Figure 3 and Figure 4The first adjustment assembly includes symmetrical first mounting slots 8 and second mounting slots 9 at the bottom of the housing 1. A first sliding rod 10 is installed inside the first mounting slot 8, and a bidirectional lead screw 11 is installed inside the second mounting slot 9. One end of the bidirectional lead screw 11 passes through a through hole in the inner wall of one end of the second mounting slot 9 and enters a placement cavity 12 at the bottom of the housing 1. One end of the bidirectional lead screw 11 is also connected to the output end of a first motor 13 installed inside the placement cavity 12. A waterproof sealing seat 14 is installed on one side of the placement cavity 12. Symmetrical first movable seats 15 are fitted onto the bidirectional lead screw 11. The first movable seats 15 are connected to the top of the first protective cover 6 and the second protective cover 7. A symmetrical first slider 16 is also installed on the top of the first protective cover 6 and the second protective cover 7. The first slider 16 is adapted to the first sliding rod 10. The second adjustment assembly includes a second sliding rod 17 and a second lead screw 18 installed at the bottom of the housing 1. One end of the screw 18 passes into the housing 1 and is connected to the second motor 19 installed inside. A second movable seat is adapted to be installed on the second screw 18. A second slider is slidably installed on the second slide rod 17. A detection frame 20 is fixedly connected between the second movable seat and the second slider. A fixed frame 21 is installed at the bottom of the detection frame 20. A first telescopic plate 22 and a second telescopic plate 23 are fixedly installed on both sides of the fixed frame 21. The other end of the first telescopic plate 22 is connected to the inner wall of one side of the first telescopic cover 24. The other end of the second telescopic plate 23 is connected to the inner wall of one side of the second telescopic cover 25. More specifically, when not detecting, the first motor 13 starts and drives the bidirectional screw 11 to rotate, causing the two first movable seats 15 to move towards each other. Through the guiding cooperation between the first slider 16 and the first slide rod 10, the first protective cover 6 and the second protective cover 7 are pushed to retract synchronously, so that the first protective cover 6 and the second protective cover 7 cover and protect the detection mechanism to avoid damage.During testing, the first motor 13 rotates in reverse, and the bidirectional lead screw 11 drives the first movable seat 15 to move backward, thereby unfolding the first protective cover 6 and the second protective cover 7. Driven by the first telescopic plate 22 and the second telescopic plate 23, the first telescopic cover 24 and the second telescopic cover 25 unfold synchronously. Through the action of the first protective cover 6, the second protective cover 7, the first telescopic plate 22, the second telescopic plate 23, the first row of rods 26 and the second row of rods 27, impurities or aquatic plants in the river can be pushed away, preventing impurities or aquatic plants from entangled in the detection components, affecting the detection accuracy or causing equipment failure. The second motor 19 starts, driving the second lead screw 18 to rotate, driving the second movable seat. The second lead screw 18 moves along the second slider, which, in conjunction with the sliding of the second slider on the second slide rod 17, drives the detection frame 20 to move up and down, thereby adjusting the immersion depth of the water quality sensor 31 to adapt to the detection requirements of different water levels and ensure that the sensor is always in the optimal measurement position. Simultaneously with the up and down movement of the detection frame 20, the first telescopic cover 24 and the second telescopic cover 25 rise and fall synchronously under the action of the first telescopic plate 22 and the second telescopic plate 23. This ensures that the first telescopic cover 24, the second telescopic cover 25, and the first row of rods 26 and the second row of rods 27 always protect the bottom of the detection frame 20, effectively preventing underwater foreign objects from interfering with or damaging the detection frame 20 and the water quality sensor 31.

[0028] refer to Figure 7The detection component includes a fixed base 30 installed at the bottom of the movable plate 29. A water quality sensor 31 is installed at the bottom of the fixed base 30, and a wedge block 32 is installed at the top of the fixed base 30. The wedge block 32 is adapted to engage with a wedge groove 33 provided at the bottom of the movable plate 29. A fixing hole 34 is provided on one side of the movable plate 29 for the wedge block 32, and a fastening screw 35 passes through the fixing hole 34. More specifically, by tightening the fastening screw 35, the wedge block 32 can be firmly engaged in the wedge groove 33, realizing the quick installation and removal of the water quality sensor 31, which is convenient for maintenance and replacement. When the sensor needs to be replaced, simply loosen the fastening screw 35 and pull the fixed base 30 horizontally to complete the disassembly. The operation is simple and efficient, ensuring the continuous and stable operation of the equipment in complex aquatic environments. The bottom of the fixed base 30 is also equipped with a protective component to protect the water quality sensor 31. The protective component includes a symmetrical first protective mesh frame 42 and a second protective mesh frame 43 installed at the bottom of the fixed base 30. The protective mesh frame 43 covers the outside of the water quality sensor 31. Symmetrical T-shaped blocks 44 are installed on the top of the first protective mesh frame 42 and the second protective mesh frame 43. The T-shaped blocks 44 are adapted to the T-shaped grooves 45 opened at both ends of the fixing base 30. Insert blocks 46 are also installed on both sides of the first protective mesh frame 42. The insert blocks 46 are inserted into the fixing frames 47 installed on both sides of the second protective mesh frame 43, and are locked in place by fixing screws 48 in the corresponding through holes on the fixing frames 47. More specifically, the insert blocks 46 and... The insertion and connection of the fixing frame 47, and the locking by the fixing screw 48 through the through hole, enable the first protective mesh frame 42 and the second protective mesh frame 43 to completely cover the water quality sensor 31, effectively blocking contact interference from aquatic plants, silt and other suspended matter. When disassembling, simply loosen the fixing screw 48 and pull out the insert 46 to separate the two protective mesh frames and quickly expose the water quality sensor 31. When it is necessary to replace the sensor, simply loosen the fastening screw 35 and pull the fixing seat 30 horizontally to complete the disassembly. The operation is simple and efficient.

[0029] refer to Figure 6The third adjustment component includes a sealing cover 36 installed on the top of the testing frame 20. An electric telescopic rod 37 is installed inside the sealing cover 36. The telescopic end of the electric telescopic rod 37 is connected to a transmission plate 38. The transmission plate 38 slides within a through slot 39 on the testing frame 20, and its other end is fixedly connected to a movable plate 29 near one edge of a fixed rod 28. Two first movable blocks 40 are rotatably mounted on a shaft at one end of the movable plate 29, which is fixedly installed at the middle section of the fixed rod 28. The two ends of the two first movable blocks 40 are respectively connected to... One end of the second movable block 41 installed on the adjacent movable plate 29 is connected. More specifically, the telescopic movement of the electric telescopic rod 37 drives the transmission plate 38 to slide in the through groove 39, thereby pushing one of the movable plates 29 to slide along the fixed rod 28. Through the linkage between the second movable block 41 installed on the shaft of one end of several movable plates 29 and the first movable block 40, the movable plates 29 are driven to move at equal distances, so that multiple sets of water quality sensors 31 can be simultaneously deployed or retracted in different water level areas, thereby improving the detection coverage and data accuracy.

[0030] The implementation principle of a water quality testing mechanism for rivers according to an embodiment of the present invention is as follows: In use, the housing 1 is placed in the river to be tested. The controller activates the first adjustment component, and the first motor 13 drives the bidirectional lead screw 11 to move the first movable seat 15 in the opposite direction, thereby unfolding the first protective cover 6 and the second protective cover 7. Under the action of the first telescopic plate 22 and the second telescopic plate 23, the first telescopic cover 24 and the second telescopic cover 25 unfold synchronously. This is achieved through the first protective cover 6, the second protective cover 7, the first telescopic plate 22, the second telescopic plate 23, and the first row of rods 2... The function of rod 6 and the second row of rods 27 is to push away impurities or aquatic plants in the river channel, preventing them from entangled in the detection structure and affecting detection accuracy or causing equipment malfunction. When detecting water quality at different depths, the second motor 19 starts, driving the second lead screw 18 to rotate, which in turn drives the second movable seat to move along the second lead screw 18. This, combined with the sliding of the second slider on the second slide rod 17, causes the detection frame 20 to move up and down, thereby adjusting the immersion depth of the water quality sensor 31 to adapt to the detection requirements of different water levels. While the detection frame 20 moves up and down, Driven by the first telescopic plate 22 and the second telescopic plate 23, the first telescopic cover 24 and the second telescopic cover 25 rise and fall synchronously, ensuring that the first telescopic cover 24, the second telescopic cover 25, the first row of rods 26, and the second row of rods 27 always protect the bottom of the detection frame 20, effectively preventing underwater foreign objects from interfering with or damaging the detection frame 20 and the water quality sensor 31. At the same time, through the telescopic movement of the electric telescopic rod 37, the transmission plate 38 slides in the through groove 39, thereby pushing one of the moving plates 29 to slide along the fixed rod 28. Through one end of several moving plates 29 The second movable block 41 mounted on the shaft works in conjunction with the first movable block 40 to drive the moving plate 29 to move at equal distances, enabling multiple sets of water quality sensors 31 to be simultaneously deployed or retracted in different water level areas, thereby improving the detection coverage and data accuracy. When it is necessary to replace the water quality sensor 31, loosen the fixing screw 48 and pull out the insert block 46 to separate the first protective mesh frame 42 and the second protective mesh frame 43, quickly exposing the water quality sensor 31. Then, loosen the fastening screw 35 and pull out the fixing seat 30 in the horizontal direction to complete the disassembly. The operation is simple and efficient.

[0031] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A water quality testing device for rivers, comprising a housing (1), characterized in that: The top of the box (1) is equipped with a support frame (2), the top of the support frame (2) is equipped with a photovoltaic panel (3), the outer wall of the box (1) is equipped with an annular mounting seat (4), the annular groove of the annular mounting seat (4) is equipped with a floating plate (5), the bottom of the box (1) is equipped with a protective mechanism, and the bottom of the box (1) is also equipped with a detection structure. The protective mechanism includes a first protective cover (6) and a second protective cover (7) installed at the bottom of the box (1). The first protective cover (6) and the second protective cover (7) are symmetrically distributed on the bottom of the box (1). A first telescopic cover (24) and a second telescopic cover (25) are slidably installed in the internal movable cavity of the first protective cover (6) and the second protective cover (7). The first telescopic cover (24) and the second telescopic cover (25) pass through the openings opened at the bottom of the first protective cover (6) and the second protective cover (7). A plurality of first row rods (26) and second row rods (27) are installed at equal intervals at the bottom of the first telescopic cover (24) and the second telescopic cover (25). The protective mechanism is also provided with a first adjustment component and a second adjustment component. The detection structure includes a detection frame (20) installed between the first protective cover (6) and the second protective cover (7). Two fixed rods (28) are fixedly installed inside the detection frame (20). Several movable plates (29) are installed on the two fixed rods (28). Detection components and protective components are installed at the bottom of the several movable plates (29). A third adjustment component that drives the detection components to adjust at equal intervals is also installed on the top of the detection frame (20). The detection assembly includes a fixed base (30) installed at the bottom of the movable plate (29), a water quality sensor (31) installed at the bottom of the fixed base (30), a wedge block (32) installed at the top of the fixed base (30), the wedge block (32) being adapted to and engaged with a wedge groove (33) provided at the bottom of the movable plate (29), and a connecting fixing hole (34) provided on one side of the wedge block (32) and the movable plate (29), with a fastening screw (35) passing through the fixing hole (34). The bottom of the mounting base (30) is also equipped with a protective component for protecting the water quality sensor (31). The protective component includes a symmetrical first protective mesh frame (42) and a second protective mesh frame (43) installed at the bottom of the mounting base (30). The first protective mesh frame (42) and the second protective mesh frame (43) cover the outside of the water quality sensor (31). The top of the first protective mesh frame (42) and the second protective mesh frame (43) are equipped with symmetrical T-shaped blocks (44). The T-shaped blocks (44) are adapted to the T-shaped grooves (45) opened at both ends of the mounting base (30). The sides of the first protective mesh frame (42) are also equipped with inserts (46). The inserts (46) are inserted into the fixing frames (47) installed on both sides of the second protective mesh frame (43) and are locked and fixed by the fixing screws (48) in the corresponding through holes on the fixing frames (47) of the inserts (46).

2. The water quality testing device for rivers according to claim 1, characterized in that: The first adjustment component includes a symmetrical first mounting groove (8) and a second mounting groove (9) opened at the bottom of the housing (1). A first slide rod (10) is installed inside the first mounting groove (8), and a bidirectional lead screw (11) is installed inside the second mounting groove (9). One end of the bidirectional lead screw (11) passes through a through hole opened in the inner wall of one end of the second mounting groove (9) and enters the placement cavity (12) opened at the bottom of the housing (1). One end of the bidirectional lead screw (11) is also connected to the output end of a first motor (13) installed inside the placement cavity (12). A waterproof sealing seat (14) is installed on one side of the placement cavity (12). A symmetrical first movable seat (15) is adapted to be installed on the bidirectional lead screw (11). The first movable seat (15) is connected to the top of the first protective cover (6) and the second protective cover (7). A symmetrical first slider (16) is also installed on the top of the first protective cover (6) and the second protective cover (7). The first slider (16) is adapted to be matched with the first slide rod (10).

3. A water quality testing device for rivers according to claim 1, characterized in that: The second adjustment assembly includes a second slide rod (17) and a second lead screw (18) installed at the bottom of the housing (1). One end of the second lead screw (18) passes into the interior of the housing (1) and is connected to a second motor (19) installed inside. A second movable seat is adapted to be installed on the second lead screw (18). A second slider is slidably installed on the second slide rod (17). A detection frame (20) is fixedly connected between the second movable seat and the second slider. A fixed frame (21) is installed at the bottom of the detection frame (20). A first telescopic plate (22) and a second telescopic plate (23) are fixedly installed on both sides of the fixed frame (21). The other end of the first telescopic plate (22) is connected to the inner wall of one side of the first telescopic cover (24). The other end of the second telescopic plate (23) is connected to the inner wall of one side of the second telescopic cover (25).

4. A water quality testing device for rivers according to claim 1, characterized in that: The third adjustment component includes a sealing cover (36) installed on the top of the testing frame (20). An electric telescopic rod (37) is installed inside the sealing cover (36). The telescopic end of the electric telescopic rod (37) is connected to a transmission plate (38). The transmission plate (38) slides in a through groove (39) opened on the testing frame (20), and its other end is fixedly connected to a movable plate (29) near one edge of a fixed rod (28). Two first movable blocks (40) are rotatably installed on a shaft provided at one end of the movable plate (29) fixedly installed at the middle section of the fixed rod (28). The two ends of the two first movable blocks (40) are respectively connected to one end of a second movable block (41) installed on an adjacent movable plate (29).

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