Sampling device for water environment monitoring

Abstract

The invention discloses a sampling device for water environment monitoring, and relates to the field of sampling equipment.The sampling device comprises an installation support fixedly installed on a monitoring ship body, and further comprises a supporting assembly installed at the top end of the installation support, the supporting assembly comprises a suspension beam and an adjusting mechanism, and one end of the suspension beam is rotationally connected with the top end of the installation support through a rotating shaft A; one side of the suspension beam is connected with an adjusting mechanism for driving the suspension beam to rotate around the axis of the rotating shaft A. The sampling assembly is mounted at the bottom of one end, away from the mounting bracket, of the suspension beam; according to the sampling device for water environment monitoring, the sampling assembly is dragged through the traction assembly, the depth of the sampling assembly can be accurately calculated by measuring the inclination angle and the winding and unwinding length of the traction rope even when water flow is urgent, meanwhile, the arranged tail wing enables the traction rope to incline in the water flow direction, and the sampling effect is improved. Calculation errors caused by the fact that the inclination direction is different from the rotation direction of the guide cylinder are avoided, and the sampling precision and the practical performance are improved.

Description

Technical Field

[0001] The invention relates to sampling equipment technology, in particular to a sampling device for water environment monitoring. Background Art

[0002] Water environment monitoring is an important part of environmental protection and water resources management. Among them, sampling and analyzing water bodies is a key step in obtaining water quality data. For example, the Chinese invention patent with authorization announcement number CN116296615B discloses a mobile water sampling device and a sampling method for water conservancy projects. The mobile water sampling device and the sampling method for water conservancy projects are provided by setting multiple floats, and the volume of the floats is consistent with the volume of the sampling tube. Therefore, after setting the spacing between the multiple floats, after the sampling tube completes a sampling, the total gravity of the barrel body just offsets the buoyancy provided by one float, so that the bottom float sinks below the water surface until the second float is flush with the water surface. At this time, the barrel body moves to the second sampling depth, and the shaft body is driven by the motor to rotate to achieve sampling of the second point. Similarly, through a single release, samples can be taken at different depths of the same point, thereby improving sampling efficiency, and no manual pulling of the lifting rope is required, and the detection accuracy is high.

[0003] When actually sampling water, although it is equipped with multiple counterweights, and the balance between the overall gravity of the barrel and the buoyancy of the water is controlled by disassembling and assembling different numbers of counterweights, when sampling in a water environment with a fast current, there is still a situation where the sampling tube is moved by the impact of the water flow, the entire device tilts, and the sampling tube deviates from its original position, resulting in a change in the sampling depth, and the water sample taken is not representative. Summary of the Invention

[0004] The purpose of the present invention is to provide a sampling device for water environment monitoring to solve the above-mentioned deficiencies in the prior art.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a sampling device for water environment monitoring, comprising a mounting bracket fixedly mounted on a monitoring vessel, and further comprising:

[0006] A support assembly is mounted on the top of the mounting bracket. The support assembly includes a suspension beam and an adjustment mechanism. One end of the suspension beam is rotatably connected to the top of the mounting bracket via a rotating shaft A. One side of the suspension beam is connected to the adjustment mechanism for driving it to rotate around the axis of the rotating shaft A.

[0007] A sampling assembly is installed at the bottom of one end of the suspension beam away from the mounting bracket, and is used to sample water;

[0008] A traction assembly is used to pull the sampling assembly. The traction assembly includes a traction rope, a guide mechanism, and a reeling mechanism. The guide mechanism includes a fixed frame, which is rotatably connected to the end of the suspension beam away from the mounting bracket via a B rotating shaft. Two guide wheels are rotatably mounted on the fixed frame. The traction rope passes around one of the guide wheels and passes between the two guide wheels to connect to the sampling assembly. The end of the traction rope away from the sampling assembly is connected to the reeling mechanism, which is used to retract and release the traction rope.

[0009] The measuring component is installed on the fixed frame. The measuring component includes a positioning frame, a guide cylinder, a horizontal axis and an angle sensor. The positioning frame is arranged at the bottom end of the fixed frame. One end of the horizontal axis is rotatably connected to the positioning frame, and the other end of the horizontal axis is fixedly connected to the guide cylinder. The traction rope passes through the inside of the guide cylinder. The angle sensor is used to measure the rotation angle of the horizontal axis.

[0010] Furthermore, the adjustment mechanism is a telescopic driving member A, the movable end of the telescopic driving member A is hinged to the suspension beam, and the fixed end of the telescopic driving member A is fixedly connected to the mounting bracket.

[0011] Furthermore, the sampling assembly includes a cylinder and multiple sampling cylinders. The top of the cylinder is fixedly connected to the traction rope, and the multiple sampling cylinders are fixedly installed inside the cylinder in a circular array with the axis of the cylinder as the center. An air hole is opened at the top of the sampling cylinder, and a piston is slidably connected inside the sampling cylinder. The top of the piston is connected to a B telescopic drive member that drives it to move along the length direction of the sampling cylinder. The sampling cylinder is connected to a water inlet pipe, the bottom end of the water inlet pipe passes through the bottom of the cylinder, and an electromagnetic valve is fixedly installed on the water inlet pipe.

[0012] Furthermore, a screw is fixedly installed at the bottom of the cylinder, and the outer thread of the screw is connected to multiple counterweights.

[0013] Furthermore, the winding mechanism includes a reel and a rotating drive member, both ends of the reel are respectively rotatably connected to the mounting bracket, one end of the reel is connected to the rotating drive member for driving it to rotate around its own axis, and the end of the traction rope away from the sampling component is wound on the reel.

[0014] Furthermore, the top end of the positioning frame is fixedly connected to the fixing frame.

[0015] Furthermore, the top end of the positioning frame is rotatably connected to the fixing frame.

[0016] Furthermore, the measuring component also includes a tail wing, one side of the tail wing is connected to a connecting frame, and the top end of the connecting frame is fixedly connected to the positioning frame.

[0017] Furthermore, a guide member is provided inside the guide cylinder, which is used to guide the traction rope as it moves along the inner wall of the guide cylinder. There are two groups of guide members, which are respectively provided at the upper and lower inner walls of the guide cylinder. The guide members are multiple balls arranged in a circular array with the axis of the guide cylinder as the center line, and the balls are embedded in the inner wall of the guide cylinder.

[0018] Furthermore, a C-telescopic drive member is provided, the movable end of the C-telescopic drive member is hinged to the fixed frame, and the fixed end of the C-telescopic drive member is hinged to the suspension beam.

[0019] Compared with the prior art, the sampling device for water environment monitoring provided by the present invention uses a traction assembly to pull the sampling assembly. Even when the water flow is relatively fast, the depth of the sampling assembly can be accurately calculated by measuring the inclination angle and the retracted and extended length of the traction rope, thereby ensuring sampling accuracy.

[0020] By measuring the inclination angle of the traction rope through an angle sensor and combining it with the measurement of the retracted and extended length of the traction rope by the reeling mechanism, the depth of the sampling component can be accurately calculated. At the same time, the tail wing enables the traction rope to tilt along the direction of water flow, avoiding calculation errors caused by the difference between the inclination direction and the rotation direction of the guide cylinder, thereby improving the sampling accuracy and practical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of a first external overall structure provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of a second external overall structure provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the overall cross-sectional structure provided by an embodiment of the present invention;

[0025] Figure 4 The embodiment of the present invention provides Figure 3 A is an enlarged schematic diagram;

[0026] Figure 5 A schematic diagram of a partial cross-sectional structure provided in an embodiment of the present invention;

[0027] Figure 6 The embodiment of the present invention provides Figure 3 A schematic diagram of the structure at point B in FIG.

[0028] Figure 7 A schematic diagram of a partial three-dimensional structure provided by an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1. Mounting bracket; 2. Suspension beam; 3. Adjustment mechanism; 4. Sampling assembly; 41. Cylinder; 42. Sampling cylinder; 43. Piston; 44. Telescopic drive element B; 45. Water inlet pipe; 46. Solenoid valve; 47. Screw; 48. Counterweight; 5. Traction assembly; 51. Traction rope; 52. Guide mechanism; 521. Fixing frame; 522. Guide wheel; 53. Winding mechanism; 531. Reel; 532. Rotary drive element; 6. Measuring assembly; 61. Positioning frame; 62. Guide cylinder; 63. Horizontal axis; 64. Angle sensor; 65. Tail wing; 66. Connecting frame; 67. Ball bearing; 7. Telescopic drive element C. 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 Figures 1 to 7 A sampling device for water environment monitoring includes a mounting bracket 1, the mounting bracket 1 is fixedly mounted on a monitoring vessel, and further includes:

[0033] A support assembly is mounted on the top of the mounting bracket 1. The support assembly includes a suspension beam 2 and an adjustment mechanism 3. One end of the suspension beam 2 is rotatably connected to the top of the mounting bracket 1 via a rotating shaft A. One side of the suspension beam 2 is connected to the adjustment mechanism 3 for driving it to rotate around the axis of the rotating shaft A.

[0034] A sampling assembly 4 is mounted on the bottom of one end of the suspension beam 2 away from the mounting bracket 1, and is used to sample water;

[0035] The traction assembly 5 is used to pull the sampling assembly 4. The traction assembly 5 includes a traction rope 51, a guide mechanism 52 and a reeling mechanism 53. The guide mechanism 52 includes a fixing frame 521. The fixing frame 521 is rotatably connected to the end of the suspension beam 2 away from the mounting bracket 1 via the B rotating shaft. Two guide wheels 522 are rotatably mounted on the fixing frame 521. The traction rope 51 passes around one of the guide wheels 522 and passes between the two guide wheels 522 to connect to the sampling assembly 4. The end of the traction rope 51 away from the sampling assembly 4 is connected to the reeling mechanism 53. The reeling mechanism 53 is used to retract and release the traction rope 51.

[0036] The measuring component 6 is installed on the fixed frame 521. The measuring component 6 includes a positioning frame 61, a guide cylinder 62, a horizontal axis 63 and an angle sensor 64. The positioning frame 61 is arranged at the bottom end of the fixed frame 521, one end of the horizontal axis 63 is rotatably connected to the positioning frame 61, and the other end of the horizontal axis 63 is fixedly connected to the guide cylinder 62. The traction rope 51 passes through the inside of the guide cylinder 62. The angle sensor 64 is used to measure the rotation angle of the horizontal axis 63. The angle sensor 64 adopts a magnetic encoder and a permanent magnet. The magnetic encoder is fixedly mounted on the positioning frame 61, and the permanent magnet is fixedly mounted on the horizontal axis 63, and ensures that the magnetic encoder can accurately sense the magnetic field changes of the permanent magnet, and measures the rotation angle of the horizontal axis 63 by the principle of electromagnetic induction. This is an existing technology and will not be elaborated here.

[0037] When monitoring the water environment, it is necessary to sample the water body. When sampling, water samples of different depths need to be obtained. The existing method of suspending the sampling mechanism with a rope is often used to sample water bodies of different depths. The depth of the water sample is determined by the length of the rope. However, this method is only suitable for sampling relatively calm water bodies. If sampling is taken in a water environment with a fast water flow, the sampling mechanism will move with the water flow under the impact of the water flow, causing the rope to tilt, and thus the depth of the water sample cannot be determined according to the length of the rope, resulting in low sampling accuracy and unrepresentative water samples.

[0038] To this end, the present application uses the traction component 5 to tow the sampling component 4, so that the sampling component 4 can reach water bodies of different depths for sampling. When the water flow is relatively fast, the water flow drives the sampling component 4 to move. At this time, the traction rope 51 drives the guide cylinder 62 to rotate around the horizontal axis 63. At this time, the angle sensor 64 measures the rotation angle A of the horizontal axis 63, which is the inclination angle of the traction rope 51, and calculates the length B of the traction rope 51 released by the winding mechanism 53, and subtracts the initial reserved length C of the traction rope 51. The depth H of the sampling component 4 can be calculated by the mathematical formula: H=(BC) / cscA, so that the depth of the water sample taken by the sampling component 4 can be accurately obtained. It is suitable for sampling in water bodies with high water flow speeds and has higher sampling accuracy.

[0039] In one embodiment of the present invention, the adjustment mechanism 3 is a telescopic drive member A, which is a telescopic cylinder or a hydraulic cylinder. The movable end of the telescopic drive member A is hinged to the suspension beam 2, and the fixed end of the telescopic drive member A is fixedly connected to the mounting bracket 1;

[0040] When sampling water, the movable end of telescopic drive member A contracts, which drives the suspension beam 2 downward, causing the sampling assembly 4 to enter the water and the guide mechanism 52 to approach the surface of the water. The sampling assembly 4 can enter and exit the water when sampling is in progress or not, making the device more suitable for monitoring and sampling water on a monitoring ship.

[0041] In one embodiment of the present invention, the sampling assembly 4 includes a cylinder 41 and a plurality of sampling cylinders 42. The top end of the cylinder 41 is fixedly connected to the traction rope 51. The plurality of sampling cylinders 42 are fixedly installed in the cylinder 41 in a circular array with the axis of the cylinder 41 as the center. An air hole is opened at the top end of the sampling cylinder 42. A piston 43 is slidably connected to the inside of the sampling cylinder 42. The top end of the piston 43 is connected to a B telescopic drive member 44 that drives it to move along the length direction of the sampling cylinder 42. The B telescopic drive member 44 is a telescopic cylinder or a hydraulic cylinder. The moving end of the B telescopic drive member 44 is fixedly connected to the piston 43. The B telescopic drive member 44 is fixedly installed on the cylinder 41. The sampling cylinder 42 is connected to a water inlet pipe 45. The bottom end of the water inlet pipe 45 passes through the bottom of the cylinder 41. A solenoid valve 46 is fixedly installed on the water inlet pipe 45.

[0042] After the sampling assembly 4 reaches the sampling depth, the solenoid valve 46 opens, and the piston 41 is driven to move by the contraction of the moving end of the B telescopic drive member 44. Under the action of negative pressure, the water sample is sucked into the sampling tube 42. At this time, the solenoid valve 46 is closed and the sampling is completed.

[0043] In one embodiment of the present invention, a screw 47 is fixedly mounted on the bottom of the cylinder 41. The external thread of the screw 47 is connected to a plurality of counterweights 48. A locking nut may also be provided at the bottom of the screw 47 to prevent the counterweights 48 from sliding off the screw 47.

[0044] By providing the counterweight 48 , the weight of the sampling assembly 4 is increased, so that the traction rope 51 can be straightened, thereby improving the accuracy of sampling.

[0045] In one embodiment of the present invention, the winding mechanism 53 includes a drum 531 and a rotary driving member 532, both ends of the drum 531 are rotatably connected to the mounting bracket 1, one end of the drum 531 is connected to the rotary driving member 532 for driving it to rotate around its own axis, the end of the traction rope 51 away from the sampling component 4 is wound on the drum 531, the rotary driving member 532 is a motor and a reducer, both of the motor and the reducer are fixedly mounted on the mounting bracket 1, the output shaft end of the motor is transmission-connected to the input end of the reducer, and the output end of the reducer is transmission-connected to the end of the drum 531, thereby driving the drum 531 to rotate, thereby realizing the winding and unwinding of the traction rope 51;

[0046] In order to measure the retracted and extended length of the traction rope 51, an encoder or counter can be installed on the reel 531 or a moving part of the traction rope 51. The encoder or counter can record the number of rotations of the reel 531 or the moving distance of the traction rope 51. For example, if the encoder records that the reel 531 rotates N times and the circumference of each circle is C, the extended length of the traction rope 51 is N*C.

[0047] In one embodiment of the present invention, the top end of the positioning frame 61 is fixedly connected to the fixing frame 521 .

[0048] Since the water flow directions in different water environments are different, it is difficult for the monitoring hull to be effectively positioned in one direction. Therefore, in one embodiment of the present invention, the top end of the positioning frame 61 is rotatably connected to the fixing frame 521.

[0049] The measuring assembly 6 further includes a tail wing 65 , one side of which is connected to a connecting frame 66 , and the top of the connecting frame 66 is fixedly connected to the positioning frame 61 ;

[0050] The tail wing 65 is immersed in the water body. Under the push of the water flow, the tail wing 65 will drive the positioning frame 61 to rotate, so that the traction rope 51 is tilted along the flow direction of the water flow, thereby avoiding the error in the calculated result caused by the inclination direction of the traction rope 51 and the rotation direction of the guide cylinder 62 being different, which can effectively improve the sampling accuracy and practical performance of the device.

[0051] In one embodiment of the present invention, a guide member is provided inside the guide cylinder 62. The guide member is used to guide the traction rope 51 when it moves along the inner wall of the guide cylinder 62. Two groups of guide members are provided, which are respectively provided at the upper and lower inner walls of the guide cylinder 62. The guide members are multiple balls 67 arranged in a circular array with the axis of the guide cylinder 62 as the center line. The balls 67 are embedded in the inner wall of the guide cylinder 62. The balls 67 can rotate in any direction around their centers. Therefore, under the guidance of the balls 67, the traction rope 51 can move smoothly relative to the guide cylinder 62.

[0052] In one embodiment of the present invention, a C telescopic drive member 7 is further provided. The C telescopic drive member 7 is a telescopic cylinder or a hydraulic cylinder. The movable end of the C telescopic drive member 7 is hinged to the fixed frame 521, and the fixed end of the C telescopic drive member 7 is hinged to the suspension beam 2.

[0053] By extending and retracting the movable end of the C telescopic drive member 7 to drive the fixed frame 521 to rotate around the connection between the fixed frame 521 and the suspension beam 2, the overall inclination angle of the measuring component 6 can be adjusted to avoid the measuring component 6 being tilted relative to the water surface in the initial state, which may cause deviations in the measurement results, thereby further improving the sampling accuracy.

[0054] In one embodiment of the present invention, a corresponding control unit can also be provided for use in conjunction with the present invention. The control unit can be selected from any controller and connected to the electrical components in the present application, thereby controlling the opening and closing operations of each electrical component. This part is prior art, and a single-chip microcomputer can be provided here as a control unit for demonstration. The single-chip microcomputer in this embodiment is a typical embedded microcontroller (Microcontroller Unit), which is composed of an arithmetic unit, a controller, a memory, an input and output device, etc., and is equivalent to a microcomputer. Compared with the general-purpose microprocessor used in personal computers, it emphasizes self-supply (no external hardware required) and cost savings. Its biggest advantage is that it is small in size and can be placed inside the instrument, but it has a small storage capacity, a simple input and output interface, and low functional consumption.

[0055] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. "Multiple" means two or more, unless otherwise specifically defined.

[0056] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0057] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0058] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0059] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0060] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sampling device for water environment monitoring, comprising a mounting bracket (1), wherein the mounting bracket (1) is fixedly mounted on a monitoring vessel, and is characterized in that: Also includes: A support assembly is mounted on the top of the mounting bracket (1), and the support assembly includes a suspension beam (2) and an adjustment mechanism (3). One end of the suspension beam (2) is rotatably connected to the top of the mounting bracket (1) via a rotating shaft A, and one side of the suspension beam (2) is connected to the adjustment mechanism (3) for driving the suspension beam (2) to rotate around the axis of the rotating shaft A. A sampling assembly (4) is mounted on the bottom of one end of the suspension beam (2) away from the mounting bracket (1), and the sampling assembly (4) is used to sample the water body; A traction assembly (5) is used to pull the sampling assembly (4). The traction assembly (5) includes a traction rope (51), a guide mechanism (52) and a reeling mechanism (53). The guide mechanism (52) includes a fixing frame (521). The fixing frame (521) is rotatably connected to an end of the suspension beam (2) away from the mounting bracket (1) via a B rotating shaft. Two guide wheels (522) are rotatably mounted on the fixing frame (521). The traction rope (51) passes around one of the guide wheels (522) and passes between the two guide wheels (522) to be connected to the sampling assembly (4). The end of the traction rope (51) away from the sampling assembly (4) is connected to the reeling mechanism (53). The reeling mechanism (53) is used to retract and release the traction rope (51). A measuring assembly (6) is mounted on a fixing frame (521). The measuring assembly (6) comprises a positioning frame (61), a guide cylinder (62), a transverse axis (63) and an angle sensor (64). The positioning frame (61) is arranged at the bottom end of the fixing frame (521). One end of the transverse axis (63) is rotatably connected to the positioning frame (61). The other end of the transverse axis (63) is fixedly connected to the guide cylinder (62). The traction rope (51) passes through the interior of the guide cylinder (62). The angle sensor (64) is used to measure the rotation angle of the transverse axis (63).

2. A sampling device for water environment monitoring according to claim 1, characterized in that: The adjustment mechanism (3) is a telescopic drive member A, the movable end of the telescopic drive member A is hinged to the suspension beam (2), and the fixed end of the telescopic drive member A is fixedly connected to the mounting bracket (1).

3. A sampling device for water environment monitoring according to claim 1, characterized in that: The sampling assembly (4) comprises a cylinder (41) and a plurality of sampling cylinders (42). The top end of the cylinder (41) is fixedly connected to a traction rope (51). The plurality of sampling cylinders (42) are fixedly installed in the cylinder (41) in a circular array with the axis of the cylinder (41) as the center. An air hole is provided at the top end of the sampling cylinder (42). A piston (43) is slidably connected to the inside of the sampling cylinder (42). The top end of the piston (43) is connected to a B telescopic driving member (44) that drives it to move along the length direction of the sampling cylinder (42). The sampling cylinder (42) is connected to a water inlet pipe (45). The bottom end of the water inlet pipe (45) passes through the bottom of the cylinder (41). A solenoid valve (46) is fixedly installed on the water inlet pipe (45).

4. A sampling device for water environment monitoring according to claim 3, characterized in that: A screw rod (47) is fixedly mounted on the bottom of the cylinder (41), and the external thread of the screw rod (47) is connected to a plurality of counterweight blocks (48).

5. A sampling device for water environment monitoring according to claim 1, characterized in that: The reeling mechanism (53) comprises a reel (531) and a rotating drive member (532). Both ends of the reel (531) are respectively connected to the mounting bracket (1) for rotation. One end of the reel (531) is connected to the rotating drive member (532) for driving the reel to rotate around its own axis. The end of the traction rope (51) away from the sampling assembly (4) is wound around the reel (531).

6. A sampling device for water environment monitoring according to claim 1, characterized in that: The top end of the positioning frame (61) is fixedly connected to the fixing frame (521).

7. A sampling device for water environment monitoring according to claim 1, characterized in that: The top end of the positioning frame (61) is rotatably connected to the fixing frame (521).

8. A sampling device for water environment monitoring according to claim 7, characterized in that: The measuring assembly (6) further comprises a tail wing (65), one side of which is connected to a connecting frame (66), and the top end of the connecting frame (66) is fixedly connected to the positioning frame (61).

9. A sampling device for water environment monitoring according to claim 1, characterized in that: A guide member is provided inside the guide cylinder (62) for guiding the traction rope (51) when it moves along the inner wall of the guide cylinder (62). Two groups of guide members are provided, which are respectively provided at the inner walls of the upper and lower ends of the guide cylinder (62). The guide members are a plurality of balls (67) arranged in a circular array with the axis of the guide cylinder (62) as the center line. The balls (67) are embedded in the inner wall of the guide cylinder (62).

10. A sampling device for water environment monitoring according to claim 1, characterized in that: A C telescopic driving member (7) is also provided, wherein the movable end of the C telescopic driving member (7) is hinged to the fixed frame (521), and the fixed end of the C telescopic driving member (7) is hinged to the suspension beam (2).

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