Water quality detection sampling method and sampling device for hydraulic engineering

Abstract

The invention discloses a water conservancy project water quality detection sampling method and device, and relates to the technical field of water conservancy project water quality detection.The water conservancy project water quality detection sampling device comprises a ship body and a mounting table, a sampling depth adjusting mechanism is fixedly arranged on the top end face of the mounting table, and a sampling mechanism is arranged on the bottom end face of the sampling depth adjusting mechanism; when the sampling mechanism descends to the sampling depth and needs sampling, the servo motor rotates to drive the cam to adjust the angle, at the moment, the protruding position of the cam makes contact with the end face of the sliding rod, the sliding rod drives the connecting block and the sliding block to move, and when the sliding block moves to expose the upper water inlet to the outside, the water level sensing mechanism senses the water level. When the lower water inlet is formed in the sampling box, sampling operation can be started, the sampling accuracy is improved, the automation degree during sampling is improved, the problem of sampling difficulty can be solved, the sampling number is two, and the contingency of samples can be effectively prevented.

Description

Technical Field

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

[0002] Water conservancy projects are projects built to control and allocate natural surface water and groundwater to achieve the purpose of eliminating harm and promoting benefits. Water is an indispensable and precious resource for human production and life, but its natural state does not fully meet human needs. Only by building water conservancy projects can we control water flow, prevent floods and waterlogging, and regulate and distribute water to meet the needs of people's life and production for water resources. In the process of water conservancy project construction or maintenance, it is necessary to test the water quality in the designated area, which requires the use of water quality sampling devices; The Chinese patent proposes a sampling device for water quality detection of water conservancy projects, the publication number is CN212988902U, including a base, casters and a lifting mechanism, a horizontal support frame is welded on the top of the right side of the bracket, a mounting plate is fixed on the right side of the bottom of the support frame by bolts, a telescopic hose 1 is provided at the input end of the pump body, a telescopic hose 2 is provided at the output end of the pump body, and a conversion mechanism cooperating with the injection mechanism is fixed at the bottom of the left outer wall of the bracket; Although the above scheme is provided with a conversion mechanism, so that water sampled at different depths can enter the corresponding sampling tube for classification and collection, thereby greatly improving the subsequent detection quality and detection accuracy, and an injection guide mechanism is provided to cooperate with the injection mechanism, and the sampling tube is fixed by a limit plate, a connecting rod and a rotating disk without affecting the disassembly of the sampling tube, so that it can stably rotate with the assembly turntable to ensure the stability of use, but there is still a problem that if the sampling point is far away from the shore, it will cause sampling difficulties, and the sampling depth of the device cannot be effectively controlled, and when sampling, water needs to be pumped out by a water pump, and only one sample is taken at a time, which is accidental and not conducive to experimental comparison; Therefore, it is necessary to design a water quality detection sampling device for water conservancy projects with strong practicality. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a water quality detection sampling device for a water conservancy project. When the sampling mechanism descends to the sampling depth and needs to take samples, the servo motor rotates to drive the cam to adjust the angle. At this time, the protrusion of the cam contacts the end face of the slide rod, and the slide rod drives the connecting block and the slide block to move. When the slide block moves to expose the upper water inlet to the outside and the lower water inlet is inside the sampling box, the sampling operation can be started, which improves the accuracy of sampling, improves the degree of automation during sampling, and can solve the problem of sampling difficulties. The number of samples is double, which can effectively prevent the randomness of the samples.

[0004] To achieve the above object, the present invention provides the following technical solutions: A water quality detection sampling device for a water conservancy project comprises a hull and a mounting platform, wherein a sampling depth adjustment mechanism is fixedly arranged on the top surface of the mounting platform, a sampling mechanism is arranged on the bottom surface of the sampling depth adjustment mechanism, and a water level sensing mechanism is fixedly arranged on the inner wall of the sampling mechanism; the sampling mechanism comprises an upper mounting frame and an upper fixed frame, a servo motor is fixedly arranged inside the upper fixed frame, a cam is fixedly arranged on the side of a driving rod of the servo motor, a sampling box is fixedly arranged on the inner wall of the upper fixed frame, a sliding sleeve is fixedly arranged on the top of the sampling box, a sliding rod is slidably arranged on the inner wall of the sliding sleeve, a fixed block 1 is fixedly arranged on the side of the sliding sleeve, a reset spring is fixedly arranged on the side of the fixed block 1, a fixed block 2 is fixedly arranged on the side of the sliding rod, and the side of the fixed block 2 is fixedly connected to the side of the reset spring, a through hole is fixedly opened on the side of the top of the sampling box, and the inner wall of the through hole A sliding block is slidably installed, an upper water inlet is provided on the top surface of the sliding block, a lower water inlet is fixedly provided on the bottom surface of the sliding block, and the upper water inlet is connected to the lower water inlet; the sampling depth adjustment mechanism includes a fixed block, a driving motor is fixedly installed on the side of the fixed block, a motor wheel is fixedly installed on the end surface of the driving motor transmission rod, a rope is fixedly installed on the side of the motor wheel, and the bottom surface of the fixed block is fixedly connected to the top surface of the mounting platform; the water level sensing mechanism includes an upper connecting piece, the end surface of the upper connecting piece is fixedly connected to the inner wall of the sampling box, a connecting rod is fixedly installed on the bottom surface of the upper connecting piece, a sliding sleeve is slidably installed on the side of the connecting rod, a mounting frame 2 is fixedly installed on the side of the sliding sleeve, a lower connecting piece is fixedly installed on the bottom surface of the connecting rod, the side of the lower connecting piece is fixedly connected to the inner wall of the sampling box, and a floating block is fixedly installed on the inner wall of the mounting frame 2.

[0005] As a further solution of the present invention: a handle is fixedly mounted on the top surface of the upper mounting frame, the number of the handles is two, which are respectively mounted on both sides of the top of the upper mounting frame, and a pull ring is fixedly mounted on the top surface of the upper mounting frame.

[0006] As a further solution of the present invention: a connecting block is fixedly installed on the end face of the sliding rod, the side face of the connecting block is fixedly connected to the side face of the sliding block, a through hole is fixedly opened on the top face of the sampling box, and a one-way exhaust valve is fixedly installed on the inner wall of the through hole.

[0007] As a further solution of the present invention: a lower fixing frame is fixedly installed on the side of the sampling box, a lower mounting frame is fixedly installed on the side of the lower fixing frame, a through hole is fixedly opened on the bottom end surface of the sampling box, a drain pipe is fixedly installed on the inner wall of the through hole, and a valve is arranged inside the drain pipe.

[0008] As a further solution of the present invention: a control component is fixedly installed on the top end surface of the inner wall of the sampling box, and the bottom end surface of the control component is abutted and connected with the top end surface of the floating block. There are two sampling boxes, which are respectively installed on both sides of the mounting frame.

[0009] As a further solution of the present invention: a mounting plate is fixedly mounted on the top surface of the mounting platform, a counting wheel is rotatably mounted on the inner wall of the mounting plate through a bearing seat, and a driven wheel is rotatably mounted on the inner wall of the mounting plate through a bearing seat.

[0010] As a further solution of the present invention: the top end surface of the hull is fixedly connected to the bottom end surface of the mounting platform, a mounting frame 1 is fixedly mounted on the side of the hull, and a floating block is fixedly mounted on the inner wall of the mounting frame 1.

[0011] As a further solution of the present invention: a transmission assembly is fixedly installed on the inner wall of the hull, the number of the transmission assembly is two groups, which are respectively installed on both sides of the stern of the hull, a control part is fixedly installed on the inner wall of the hull, and a protective shell is provided on the side of the transmission assembly.

[0012] As a further solution of the present invention: a drop opening is opened through the bottom end surface of the hull, a hinge is fixedly installed on the top end surface of the hull, a cover plate is fixedly installed on the side of the hinge, a handle is fixedly installed on the top end surface of the cover plate, a heat dissipation hole is fixedly opened on the side of the hull, and a water retaining plate is fixedly installed on the inner wall of the hull.

[0013] In addition, the present invention also provides a method for using a water quality detection sampling device for a water conservancy project, comprising the following steps: Step 1: Move the sampling device above the sampling point and place the sampling device into the water through the sampling depth adjustment mechanism; Step 2: After reaching the specified depth, turn on the servo motor to drive the slider to open and perform sampling operations; Step 3: When sampling, the water level inside the sampling box drives the float to rise and contact the control component. At this time, the slider is closed to complete the sampling operation; Step 4: Retract the sampling depth adjustment mechanism, pull the sampling mechanism out of the water, and move the device through the hull to the operator.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, when the sampling mechanism descends to the sampling depth and needs to be sampled, the servo motor is turned on, and the servo motor rotates to drive the cam to adjust the angle. At this time, the outer protrusion of the cam contacts the end surface of the slide rod, and the slide rod is pushed to slide on the inner wall of the slide sleeve. At the same time, the slide rod drives the second fixed block installed on the side of the slide rod to move, and pulls the reset spring to expand outward. When the slide rod moves, it drives the connecting block and the slide block to move. When the slide block moves to expose the upper water inlet to the outside and the lower water inlet is inside the sampling box, the sampling operation can be started. When sampling, the air inside the sampling box is discharged through the one-way exhaust valve to prevent To prevent the internal air pressure from being too high, which makes sampling difficult, after the sampling is completed, the servo motor drives the cam to rotate until the concave surface of the cam contacts the end face of the slide rod. At this time, the reset spring pulls the fixed block 2 to reset, and drives the slide block to reset, so that the sampling point can be sampled, the accuracy of sampling is improved, and the degree of automation during sampling can be improved. Cooperation with the hull can solve the problem that if the sampling point is far away from the shore, it will cause sampling difficulties, thereby improving the scope of application of the device. The sampling quantity is double, which can effectively prevent the randomness of the sample and improve the sampling quality of the device.

[0015] According to the present invention, when water enters the sampling mechanism, as the water level inside the sampling box rises, the float block is driven to rise on the side of the connecting rod. When the water level rises to the point where the float block contacts the control component, the drive motor is started to tighten the rope. At this time, the rope pulls the pull ring to rise, driving the upper mounting frame to rise. After the sampling mechanism is pulled out of the water, the sampling device is moved to the shore through the transmission component, and the fixation of the rope and the pull ring is released, and the sampling mechanism is taken out. After the water level sensing mechanism knows that the sampling is completed, the drive motor is turned on, and the drive motor drives the motor wheel to rotate, driving the rope on the surface of the motor wheel to shrink and cooperate with the driven wheel to pull the sampling mechanism out of the water. The length of the rope pay-out can be controlled by the number of turns of the counting wheel, and then the sampling depth can be controlled and adjusted. The problem that the sampling depth cannot be effectively controlled in traditional sampling devices is solved, the application scenarios of the device are improved, and the practicality of the device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] In the attached picture: Figure 1 It is a schematic diagram of the three-dimensional structure of a water quality detection sampling device for a water conservancy project in an embodiment of the present invention; Figure 2 is a bottom view of a hull structure in an embodiment of the present invention; Figure 3 is a schematic diagram of a hull cross-section structure in an embodiment of the present invention; Figure 4is a schematic diagram of the structure of a driving motor in an embodiment of the present invention; Figure 5 is a schematic diagram of the structure of an upper mounting frame in an embodiment of the present invention; Figure 6 is a schematic diagram of the structure of the lower mounting frame in an embodiment of the present invention; Figure 7 is a schematic diagram of the structure of a servo motor in an embodiment of the present invention; Figure 8 is a schematic diagram of a partial cross-sectional structure of a sampling mechanism in an embodiment of the present invention; Fig. 9 2 is a schematic diagram of the structure of a one-way exhaust valve in an embodiment of the present invention; Fig.10 It is a schematic diagram of the structure of a water level sensing mechanism in an embodiment of the present invention; Fig.11 It is a schematic diagram of the structure of the sampling depth adjustment mechanism in an embodiment of the present invention.

[0018] In the figure: 1, hull; 2, mounting frame 1; 3, floating block; 4, drop port; 5, mounting platform; 6, sampling depth adjustment mechanism; 601, fixed block; 602, driving motor; 603, motor wheel; 604, mounting plate; 605, counting wheel; 606, driven wheel; 7, sampling mechanism; 701, upper mounting frame; 702, handle; 703, pull ring; 704, upper fixing frame; 705, sampling box; 706, one-way exhaust valve; 707, lower fixing frame; 708, sliding sleeve; 709, fixed block 1; 710, reset spring; 711, slide rod; 712, fixed Block 2; 713, connecting block; 714, slider; 715, upper water inlet; 716, lower water inlet; 717, lower mounting frame; 718, drain pipe; 719, valve; 720, servo motor; 721, cam; 8, water level sensing mechanism; 801, control component; 802, upper connecting piece; 803, lower connecting piece; 804, connecting rod; 805, sliding sleeve; 806, mounting frame 2; 807, floating block; 9, transmission component; 10, control component; 11, protective shell; 12, heat dissipation hole; 13, hinge; 14, cover plate; 15, handle; 16, water baffle. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] Embodiment 1 Combination Figure 5-Figure 9 The present invention provides a technical solution: a water quality detection sampling device for a water conservancy project, comprising a hull 1 and a mounting platform 5, wherein a sampling depth adjustment mechanism 6 is fixedly arranged on the top surface of the mounting platform 5, a sampling mechanism 7 is arranged on the bottom surface of the sampling depth adjustment mechanism 6, a water level sensing mechanism 8 is fixedly arranged on the inner wall of the sampling mechanism 7, the sampling mechanism 7 comprises an upper mounting frame 701 and an upper fixing frame 704, a servo motor 720 is fixedly installed inside the upper fixing frame 704, and a transmission rod of the servo motor 720 is fixedly installed on the side of the servo motor 720. A cam 721 is installed, a sampling box 705 is fixedly installed on the inner wall of the upper fixed frame 704, a sliding sleeve 708 is fixedly installed on the top of the sampling box 705, a sliding rod 711 is slidably installed on the inner wall of the sliding sleeve 708, a fixed block 1 709 is fixedly installed on the side of the sliding sleeve 708, a return spring 710 is fixedly installed on the side of the fixed block 1 709, a fixed block 2 712 is fixedly installed on the side of the slide rod 711, and the side of the fixed block 2 712 is fixedly connected to the side of the return spring 710. The surface is fixed with a through hole, and a slider 714 is slidably installed on the inner wall of the through hole. An upper water inlet 715 is fixedly opened on the top of the slider 714, and a lower water inlet 716 is fixedly opened on the bottom end surface of the slider 714. The upper water inlet 715 is connected with the lower water inlet 716. A handle 702 is fixedly installed on the top surface of the upper mounting frame 701. The number of handles 702 is two, which are respectively installed on both sides of the top of the upper mounting frame 701. A pull ring 703 is fixedly installed on the top surface of the upper mounting frame 701. The end surface of the slide rod 711 A connecting block 713 is fixedly installed, and the side of the connecting block 713 is fixedly connected to the side of the slider 714. A through hole is fixedly opened on the top surface of the sampling box 705, and a one-way exhaust valve 706 is fixedly installed on the inner wall of the through hole. A lower fixing frame 707 is fixedly installed on the side of the sampling box 705, and a lower mounting frame 717 is fixedly installed on the side of the lower fixing frame 707. A through hole is fixedly opened on the bottom end surface of the sampling box 705, and a drain pipe 718 is fixedly installed on the inner wall of the through hole, and a valve 719 is arranged inside the drain pipe 718.

[0022] Specifically, when the sampling mechanism 7 descends to the sampling depth and needs to be sampled, the servo motor 720 is turned on, and the servo motor 720 rotates to drive the cam 721 to adjust 45 degrees. At this time, the protruding part of the cam 721 contacts the end surface of the slide bar 711, and the slide bar 711 is pushed to slide on the inner wall of the slide sleeve 708. At the same time, the slide bar 711 drives the fixed block 712 installed on the side of the slide bar 711 to move, and pulls the reset spring 710 to expand outward. When the slide bar 711 moves, it will drive the connecting block 713 and the slider 714 to move. When block 714 moves to expose the upper water inlet 715 to the outside and the lower water inlet 716 is inside the sampling box 705, the sampling operation can begin. During sampling, the air inside the sampling box 705 is discharged through the one-way exhaust valve 706 to prevent the internal air pressure from being too high, which makes sampling difficult. After the sampling is completed, the servo motor 720 drives the cam 721 to rotate until the concave surface of the cam 721 contacts the end face of the slide bar 711. At this time, the reset spring 710 pulls the fixed block 2 712 to reset, and drives the slide bar 714 to reset.

[0023] Embodiment 2 See also Figure 4 and Fig.11 , and on the basis of the first embodiment, it is further obtained that the sampling depth adjustment mechanism 6 includes a fixed block 601, a driving motor 602 is fixedly installed on the side of the fixed block 601, a motor wheel 603 is fixedly installed on the end surface of the transmission rod of the driving motor 602, a rope is fixedly installed on the side of the motor wheel 603, the bottom end surface of the fixed block 601 is fixedly connected to the top surface of the mounting platform 5, and the top surface of the mounting platform 5 is fixedly installed with a mounting plate 604. The inner wall of the mounting plate 604 is rotatably installed with a counting wheel 605 through a bearing seat, and the inner wall of the mounting plate 604 is rotatably installed with a driven wheel 606 through a bearing seat. Specifically, when it is known through the water level sensing mechanism 8 that the sampling is completed, the driving motor 602 is turned on, and the driving motor 602 drives the motor wheel 603 to rotate, drives the rope on the surface of the motor wheel 603 to shrink, and cooperates with the driven wheel 606 to pull the sampling mechanism 7 out of the water, and can control the length of the rope pay-out by the number of turns of the counting wheel 605, thereby controlling and adjusting the sampling depth.

[0024] Embodiment 3 See also Figure 1-Figure 11On the basis of the second embodiment, it is further obtained that the top surface of the hull 1 is fixedly connected to the bottom surface of the mounting platform 5, a mounting frame 2 is fixedly installed on the side of the hull 1, a floating block 3 is fixedly installed on the inner wall of the mounting frame 2, a transmission assembly 9 is fixedly installed on the inner wall of the hull 1, and the number of the transmission assembly 9 is two groups, which are respectively installed on both sides of the tail of the hull 1, a control part 10 is fixedly installed on the inner wall of the hull 1, a protective shell 11 is provided on the side of the transmission assembly 9, and a drop opening 4 is opened through the bottom surface of the hull 1 from top to bottom, a hinge 13 is fixedly installed on the top surface of the hull 1, a cover plate 14 is fixedly installed on the side of the hinge 13, and a handle 15 is fixedly installed on the top surface of the cover plate 14, a heat dissipation hole 12 is fixedly opened on the side of the hull 1, and a water retaining plate 16 is fixedly installed on the inner wall of the hull 1 ; A control component 801 is fixedly installed on the top surface of the inner wall of the sampling box 705, and the bottom surface of the control component 801 is abutted and connected with the top surface of the floating block 807. There are two sampling boxes 705, which are respectively installed on both sides of the mounting frame. The water level sensing mechanism 8 includes an upper connecting member 802, and the end surface of the upper connecting member 802 is fixedly connected to the inner wall of the sampling box 705. A connecting rod 804 is fixedly installed on the bottom surface of the upper connecting member 802. A sliding sleeve 805 is slidably installed on the side of the connecting rod 804. A mounting frame 806 is fixedly installed on the side of the sliding sleeve 805. A lower connecting member 803 is fixedly installed on the bottom surface of the connecting rod 804. The side of the lower connecting member 803 is fixedly connected to the inner wall of the sampling box 705, and a floating block 807 is fixedly installed on the inner wall of the mounting frame 806; Specifically, when water enters the sampling mechanism 7, as the water level inside the sampling box 705 rises, the float 807 is driven to rise on the side of the connecting rod 804. When the water level rises to the point where the float 807 contacts the control component 801, the drive motor 602 is started to tighten the rope. At this time, the rope pulls the pull ring 703 up, driving the upper mounting frame 701 to rise. After the sampling mechanism 7 is pulled out of the water, the sampling device is moved to the shore through the transmission component 9, the rope and the pull ring 703 are released, and the sampling mechanism 7 is taken out.

[0025] In the description of the present invention, it is necessary to understand that the terms "center", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A water quality detection sampling device for a hydraulic project, comprising a hull (1) and a mounting platform (5), characterized in that: A sampling depth adjustment mechanism (6) is fixedly arranged on the top surface of the mounting platform (5), a sampling mechanism (7) is fixedly arranged on the bottom surface of the sampling depth adjustment mechanism (6), and a water level sensing mechanism (8) is fixedly arranged on the inner wall of the sampling mechanism (7); The sampling mechanism (7) comprises an upper mounting frame (701) and an upper fixed frame (704); a servo motor (720) is fixedly mounted inside the upper fixed frame (704); a cam (721) is fixedly mounted on the side of a transmission rod of the servo motor (720); a sampling box (705) is fixedly mounted on the inner wall of the upper fixed frame (704); a sliding sleeve (708) is fixedly mounted on the top of the sampling box (705); a sliding rod (711) is slidably mounted on the inner wall of the sliding sleeve (708); a fixed block (709) is fixedly mounted on the side of the sliding sleeve (708); A return spring (710) is fixedly installed on the side of block one (709), a fixed block two (712) is fixedly installed on the side of the slide rod (711), the side of the fixed block two (712) is fixedly connected to the side of the return spring (710), a through hole is fixedly opened on the top side of the sampling box (705), a slider (714) is slidably installed on the inner wall of the through hole, an upper water inlet (715) is opened on the top surface of the slider (714), and a lower water inlet (716) is fixedly opened on the bottom surface of the slider (714), and the upper water inlet (715) is connected to the lower water inlet (716); The sampling depth adjustment mechanism (6) comprises a fixed block (601), a driving motor (602) is fixedly mounted on the side of the fixed block (601), a motor wheel (603) is fixedly mounted on the end surface of the transmission rod of the driving motor (602), a rope is fixedly mounted on the side of the motor wheel (603), and the bottom end surface of the fixed block (601) is fixedly connected to the top end surface of the mounting platform (5); The water level sensing mechanism (8) comprises an upper connecting member (802), the end face of the upper connecting member (802) being fixedly connected to the inner wall of the sampling box (705), a connecting rod (804) being fixedly mounted on the bottom end face of the upper connecting member (802), a sliding sleeve (805) being slidably mounted on the side of the connecting rod (804), a second mounting frame (806) being fixedly mounted on the side of the sliding sleeve (805), a lower connecting member (803) being fixedly mounted on the bottom end face of the connecting rod (804), a side face of the lower connecting member (803) being fixedly connected to the inner wall of the sampling box (705), and a floating block (807) being fixedly mounted on the inner wall of the second mounting frame (806).

2. A water quality detection sampling device for water conservancy projects according to claim 1, characterized in that: A handle (702) is fixedly mounted on the top surface of the upper mounting frame (701). There are two handles (702), which are respectively mounted on two sides of the top of the upper mounting frame (701). A pull ring (703) is fixedly mounted on the top surface of the upper mounting frame (701).

3. A water quality detection sampling device for water conservancy projects according to claim 1, characterized in that: A connecting block (713) is fixedly mounted on the end surface of the slide rod (711), and a side surface of the connecting block (713) is fixedly connected to a side surface of a slide block (714). A through hole is fixedly opened on the top surface of the sampling box (705), and a one-way exhaust valve (706) is fixedly mounted on the inner wall of the through hole.

4. A water quality detection sampling device for water conservancy projects according to claim 2, characterized in that: A lower fixing frame (707) is fixedly mounted on the side of the sampling box (705), a lower mounting frame (717) is fixedly mounted on the side of the lower fixing frame (707), a through hole is fixedly opened on the bottom end surface of the sampling box (705), a drainage pipe (718) is fixedly mounted on the inner wall of the through hole, and a valve (719) is arranged inside the drainage pipe (718).

5. A water quality detection sampling device for water conservancy projects according to claim 2, characterized in that: A control component (801) is fixedly mounted on the top end surface of the inner wall of the sampling box (705), and the bottom end surface of the control component (801) is abutted against the top end surface of the floating block (807). There are two sampling boxes (705), which are respectively mounted on both sides of the mounting frame.

6. A water quality detection sampling device for water conservancy projects according to claim 1, characterized in that: A mounting plate (604) is fixedly mounted on the top surface of the mounting platform (5), a counting wheel (605) is rotatably mounted on the inner wall of the mounting plate (604) via a bearing seat, and a driven wheel (606) is rotatably mounted on the inner wall of the mounting plate (604) via a bearing seat.

7. A water quality detection sampling device for water conservancy projects according to claim 1, characterized in that: The top end surface of the hull (1) is fixedly connected to the bottom end surface of the mounting platform (5); a mounting frame (2) is fixedly mounted on the side of the hull (1); and a floating block (3) is fixedly mounted on the inner wall of the mounting frame (2).

8. A water quality detection sampling device for water conservancy projects according to claim 1, characterized in that: A transmission assembly (9) is fixedly mounted on the inner wall of the hull (1). The number of the transmission assemblies (9) is two groups, which are respectively mounted on two sides of the stern of the hull (1). A control component (10) is fixedly mounted on the inner wall of the hull (1). A protective shell (11) is provided on the side of the transmission assembly (9).

9. A water quality detection sampling device for water conservancy projects according to claim 1, characterized in that: The bottom end surface of the hull (1) is provided with a drop opening (4) extending through the top and bottom, the top end surface of the hull (1) is fixedly mounted with a hinge (13), the side of the hinge (13) is fixedly mounted with a cover plate (14), the top end surface of the cover plate (14) is fixedly mounted with a handle (15), the side of the hull (1) is fixedly provided with a heat dissipation hole (12), and the inner wall of the hull (1) is fixedly mounted with a water retaining plate (16).

10. A method for using the water quality detection sampling device for a water conservancy project according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Move the sampling device above the sampling point and place the sampling mechanism (7) into the water through the sampling depth adjustment mechanism (6); Step 2: After reaching the designated depth, the servo motor (720) is turned on to drive the slider (714) to open and perform sampling operations; Step 3: When sampling, the water level inside the sampling box (705) drives the float (807) to rise and contact with the control component (801). At this time, the slider (714) is closed to complete the sampling operation; Step 4: Retract the sampling depth adjustment mechanism (6), pull the sampling mechanism (7) out of the water, and move the device to the operator's side through the hull (1).

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