Riverway treatment unmanned aerial vehicle flying device facilitating sewage sampling

Abstract

The application provides a river treatment unmanned aerial vehicle flight device convenient for sewage sampling, and belongs to the technical field of water sample collection. The device comprises an unmanned aerial vehicle body, a moving unit, a pulling unit and a sampling unit. The bottom of the unmanned aerial vehicle body is provided with a lifting rope and a winding and unwinding assembly for winding or unwinding the lifting rope. The moving unit comprises a moving seat and two moving assemblies arranged on the top and bottom of the moving seat respectively. The moving seat is provided with a through hole through which the lifting rope passes. The moving assembly comprises a fastening ring sleeved on the lifting rope, a support column connected between the fastening ring and the moving seat and a pump-in piece communicated with the support column. The support column is communicated with the fastening ring, and the pump-in piece is used for pumping filler into the support column and the fastening ring. The pulling unit corresponds to the fastening ring one by one, and is arranged between the moving seat and the fastening ring and used for pulling the fastening ring to move close to the moving seat. The sampling unit is connected to the moving seat and used for collecting water samples. The application improves the efficiency of water sample collection at multiple depths.

Description

Technical Field

[0001] This invention belongs to the technical field of water sampling, specifically relating to a drone flying device for river management that facilitates sewage sampling. Background Technology

[0002] With the acceleration of industrialization and urbanization, river water pollution has become increasingly serious, posing a significant challenge to ecological environment improvement and sustainable development. Timely and accurate understanding of river water quality is the foundation and prerequisite for implementing precise and efficient river management; therefore, water quality monitoring is necessary, and sampling is the core component of water quality monitoring.

[0003] Due to their maneuverability, flexibility, and ease of operation, drones are increasingly being used for water sampling. When using drones for sampling, the water sampler must first be lowered into the target water area, then used to collect water samples, and finally retrieved after collection.

[0004] When it is necessary to collect water samples at different depths, different counterweights need to be configured so that the water sampler can reach different depths. Each time it is lowered, only one depth of water sample can be collected. The above operation steps need to be repeated to achieve water sample collection at multiple depths, which has the drawback of low water sample collection efficiency. Summary of the Invention

[0005] This invention provides a drone flight device for river management that facilitates sewage sampling, aiming to solve the technical problem of low efficiency in collecting water samples at various depths.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a drone flight device for river management that facilitates sewage sampling, comprising:

[0007] The drone body has a suspension rope at the bottom and a retraction and release assembly for winding or unwinding the suspension rope;

[0008] The moving unit includes a moving base and two moving components respectively disposed at the top and bottom of the moving base. The moving base has a through hole for the hoisting rope to pass through. The moving component includes a fastening ring sleeved on the hoisting rope, a support column connected between the fastening ring and the moving base, and a pumping component communicating with the support column. The support column is in communication with the fastening ring, and the pumping component is used to pump filler into the support column and the fastening ring.

[0009] A pulling unit, corresponding to each of the fastening rings, is disposed between the movable seat and the fastening ring, and is used to pull the fastening ring towards the movable seat; and

[0010] A sampling unit, connected to the movable base, is used to collect water samples.

[0011] In one possible implementation, the movable seat has a pitch-changing cavity that corresponds one-to-one with the support column, and the pitch-changing cavity is provided with a pitch-changing unit.

[0012] The pitch unit includes:

[0013] A pitch-changing roller, disposed within the pitch-changing cavity, is rotatably connected to the movable seat. The pitch-changing roller rotates about its own central axis, and the end of the support column away from the fastening ring is fixedly connected to the outer wall of the pitch-changing roller; and

[0014] A variable pitch power component is connected to the variable pitch roller and is used to drive the variable pitch roller to rotate.

[0015] In one possible implementation, two baffles are fixedly connected to the opening of the pitch cavity, the line connecting the two baffles is perpendicular to the extension direction of the pitch roller, and a feeding port for the support column to pass through is provided between the two baffles.

[0016] A feeding unit is provided at the opening of the pitch cavity, and the feeding unit includes:

[0017] Two feeding rollers are positioned correspondingly below the baffle. The sides of the two feeding rollers that are close to each other extend below the feeding port. A gap is left between the two feeding rollers for the support column to pass through. The feeding rollers are rotatably connected to the movable seat, and the rotation axis of the feeding rollers is parallel to the rotation axis of the variable pitch roller.

[0018] The feeding power component is connected to the feeding roller and is used to drive the feeding roller to rotate.

[0019] In one possible implementation, a sealing sleeve is fixed to the outer periphery of the feed roller, the sealing sleeve extending axially along the feed roller.

[0020] In one possible implementation, the sampling unit includes:

[0021] A sampling box is fixedly connected to the movable base. The sampling box has a sampling cavity inside. The inner wall of the sampling cavity has an annular bottle transport groove. The bottom wall of the sampling box has a sample inlet communicating with the bottle transport groove. The sampling box also has a bottle retrieval port communicating with the sampling cavity.

[0022] Multiple sampling seats are disposed in the bottle transport trough, and the sampling seats are slidably connected to the sampling box along the circumference of the bottle transport trough;

[0023] A bottle-carrying power component is connected to the sampling seat and is used to drive the sampling seat to move;

[0024] Sampling bottles are arranged one-to-one with the sampling base; and

[0025] A sealing plate is provided inside the bottle opening, and the sealing plate is detachably connected to the sampling box;

[0026] Specifically, when the sampling bottle is moved to align with the inlet, both the bottle opening and the inlet are in the open state; at other times, both the bottle opening and the inlet are in the closed state.

[0027] In one possible implementation, the diameter of the inlet near the sampling chamber is smaller than the diameter of the other end. An outer plug is provided inside the inlet. The outer plug is slidably connected to the sampling box in the vertical direction. A first elastic member is fixed between the outer plug and the sampling box. The first elastic member has a pre-tightening force that causes the outer plug to seal the inlet.

[0028] The sampling bottle has an inner plug inside its opening. The inner plug is slidably connected to the sampling bottle in the vertical direction. A second elastic member is fixed between the inner plug and the sampling bottle. The second elastic member is designed to allow the inner plug to seal the opening of the sampling bottle. The opening of the sampling bottle is plugged into and adapted to the inlet.

[0029] The sampling unit further includes:

[0030] A sliding base, corresponding one-to-one with the sampling base, is slidably connected to the sampling base in the up-down direction, and the sliding base is provided with an adsorption element for adsorbing and fixing the sampling bottle;

[0031] A sampling power component, driven by a slide block, is used to drive the slide block to move; and

[0032] The probe extends vertically, with its bottom end inserted into the injection port and fixed to the outer plug, and its other end inserted into the transport bottle groove.

[0033] In one possible implementation, a water-proof cover is provided around the sample inlet, and the water-proof cover is fixedly connected to the sampling box;

[0034] The bottle transport trough is equipped with a water intake unit, which includes:

[0035] A water inlet tank is fixedly connected to the sampling box;

[0036] A water inlet pipe, connecting the sample inlet and the water inlet tank; and

[0037] A water-drawing power unit is used to divert the residual water sample in the inlet to the water-drawing tank.

[0038] In one possible implementation, a filter screen is provided inside the injection port, and the filter screen is fixedly connected to the sampling box.

[0039] In one possible implementation, a pulling cavity is provided inside the movable seat, and the pulling unit corresponds one-to-one with the fastening ring;

[0040] The pulling unit includes:

[0041] A pulling roller is disposed inside the pulling cavity, and the pulling roller rotates around its own central axis;

[0042] A pulling force component, connected to the pulling roller, is used to drive the pulling roller to rotate; and

[0043] The pull rope has one end fixedly connected to the pull roller, and the other end extends out of the pull cavity and is fixedly connected to the fastening ring.

[0044] In one possible implementation, the suspension rope has a filling cavity that communicates with the pumping component.

[0045] The UAV flight device for river management that facilitates sewage sampling provided by this invention, compared with the prior art, changes the position of the sampling unit relative to the suspension rope by moving the unit, so that the sampling unit can be positioned at different water depths without having to retract the suspension rope to replace the counterweight before descending. It can complete water sample collection at multiple depths in a single hover, thus improving the efficiency of water sample collection at multiple depths. Attached Figure Description

[0046] Figure 1 This is a partial schematic diagram of a drone flight device for river management that facilitates sewage sampling, according to an embodiment of the present invention.

[0047] Figure 2 This is a partial cross-sectional view illustrating the pitch-changing unit and the feeding unit in an embodiment of the present invention;

[0048] Figure 3 This is a partial cross-sectional view illustrating the sampling method in an embodiment of the present invention;

[0049] Figure 4 This is a partial cross-sectional view illustrating the pull unit in an embodiment of the present invention;

[0050] Figure 5 This is a cross-sectional view illustrating the filling cavity in an embodiment of the present invention.

[0051] Explanation of reference numerals in the attached figures:

[0052] 10. Unmanned aerial vehicle body; 101. Suspension rope; 1011. Filling cavity;

[0053] 20. Moving unit; 201. Moving base; 2011. Through hole; 2012. Variable pitch cavity; 2013. Baffle; 2014. Pulling cavity; 202. Fastening ring; 203. Support column;

[0054] 30. Pulling unit; 301. Pulling roller; 302. Pulling power component; 303. Pulling rope;

[0055] 40. Sampling unit; 401. Sampling box; 4011. Sampling chamber; 4012. Feed chute; 4013. Sample inlet; 4014. Bottle dispensing port; 4015. Outer plug; 4016. First elastic component; 4017. Waterproof cover; 4018. Filter screen; 402. Sampling seat; 403. Bottle transport power component; 404. Sampling bottle; 4041. Inner plug; 4042. Second elastic component; 405. Sealing plate; 406. Sliding seat; 407. Sampling power component; 408. Probe;

[0056] 50. Pitch-changing unit; 501. Pitch-changing roller; 502. Pitch-changing power component;

[0057] 60. Feeding unit; 601. Feeding roller; 602. Feeding power unit;

[0058] 70. Water intake unit; 701. Water intake tank; 702. Water intake pipe. Detailed Implementation

[0059] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0060] Please refer to the following: Figures 1 to 5This invention describes a drone flight device for river management that facilitates wastewater sampling. The drone flight device for river management includes a drone body 10, a moving unit 20, a pulling unit 30, and a sampling unit 40. The drone body 10 has a suspension rope 101 at its bottom and a winding / unwinding assembly for winding or unwinding the suspension rope 101. The winding / unwinding assembly is prior art and will not be described further in this application. The moving unit 20 includes a moving base 201 and two moving components respectively located at the top and bottom of the moving base 201. The moving base 201 has a through hole 2011 for the suspension rope 101 to pass through. The moving components include a fastening ring 202 fitted onto the suspension rope 101 and a connecting element between the fastening ring 202 and the sampling unit 40. The support column 203 between the movable seats 201 and the pumping component connected to the support column 203, the fastening ring 202 and the support column 203 are all made of flexible materials, such as plastic products. The support column 203 is connected to the fastening ring 202. The pumping component is used to pump filler into the support column 203 and the fastening ring 202. The pulling unit 30 corresponds to the fastening ring 202 one by one. The pulling unit 30 is located between the movable seats 201 and the fastening ring 202 and is used to pull the fastening ring 202 to move closer to the movable seats 201. There are two pulling units 30 and they are symmetrically arranged vertically. The sampling unit 40 is connected to the movable seats 201 and is used to collect water samples.

[0061] Optionally, the filler is water, and the pumping unit is a water pump, directly utilizing the water in the river channel.

[0062] Optionally, the filler is air, and the pumping unit is an air pump.

[0063] The UAV flight device for river management that facilitates sewage sampling provided in this embodiment first fills the lower fastening ring 202 and support column 203 with filler material through a pumping unit, thereby fixing the lower fastening ring 202 to the suspension rope 101. Then, the upper pulling unit 30 pulls the upper fastening ring 202 and support column 203, which are not filled with filler material, towards the moving seat 201, thereby reducing the distance between the upper fastening ring 202 and the moving seat 201. Finally, the filler material in the lower fastening ring 202 and support column 203 is discharged, while the pumping unit pumps filler material into the upper fastening ring 202 and support column 203, fixing the upper fastening ring 202 to the suspension rope 101. During the process of pumping filler material into the upper fastening ring 202 and support column 203, the upper fastening ring 202 and support column 203 change from flexible to rigid, thereby forcing the moving seat 201 to move downward along the suspension rope 101. Repeat the above steps until the sampling unit 40 is moved to the preset water depth and then stops. At this time, the sampling unit 40 starts sampling. After water samples from multiple depths are collected, reverse the above steps to move the moving seat 201 upward along the suspension rope 101, or directly use the retraction component to retract the suspension rope 101 so that the moving seat 201 is lifted off the water surface.

[0064] Compared with existing technologies, by changing the position of the sampling unit 40 relative to the suspension rope 101 by moving the unit 20, the sampling unit 40 can be positioned at different water depths without having to retract the suspension rope 101 to replace the counterweight before going down again. This allows for the collection of water samples at multiple depths with a single hover, thus improving the efficiency of water sample collection at multiple depths.

[0065] In some embodiments, see Figure 1 and Figure 2 The movable base 201 has a pitch-changing cavity 2012 corresponding to the support column 203. The pitch-changing cavity 2012 is equipped with a pitch-changing unit 50. The pitch-changing unit 50 includes a pitch-changing roller 501 and a pitch-changing power component 502. The pitch-changing roller 501 is located in the pitch-changing cavity 2012 and is rotatably connected to the movable base 201. The pitch-changing roller 501 rotates around its own central axis. The end of the support column 203 away from the fastening ring 202 is fixedly connected to the outer wall of the pitch-changing roller 501. The pitch-changing power component 502 is driven by the pitch-changing roller 501 and is used to drive the pitch-changing roller 501 to rotate. The pitch-changing power component 502 is a servo motor.

[0066] The variable pitch power component 502 starts and drives the variable pitch roller 501 to rotate, thereby causing the variable pitch roller 501 to wind up or unwind the support column 203. When winding up the support column 203, the distance of each movement is reduced; when unwinding the support column 203, the distance of each movement is increased. By controlling the length of the unwinding of the support column 203, the distance of each movement of the moving seat 201 is controlled, so that the distance of each movement of the moving seat 201 can be arbitrarily adjusted to adapt to different water depth requirements.

[0067] In some embodiments, see Figure 2 Two baffles 2013 are fixedly connected to the opening of the pitch cavity 2012. The line connecting the two baffles 2013 is perpendicular to the extension direction of the pitch roller 501. A feeding port for the support column 203 to pass through is provided between the two baffles 2013.

[0068] A feeding unit 60 is provided at the opening of the pitch cavity 2012. The feeding unit 60 includes two feeding rollers 601 and a feeding power component 602. The two feeding rollers 601 are respectively arranged under the baffle 2013. The side of the two feeding rollers 601 that is close to each other extends to the bottom of the feeding port. A gap is left between the two feeding rollers 601 for the support column 203 to pass through. The feeding rollers 601 are rotatably connected to the movable seat 201. The rotation axis of the feeding rollers 601 is parallel to the rotation axis of the pitch roller 501. The feeding power component 602 is driven to the feeding rollers 601 and is used to drive the feeding rollers 601 to rotate. The feeding power component 602 is a servo motor.

[0069] A sealing sleeve is fixed to the outer periphery of the feed roller 601, and the sealing sleeve extends along the axial direction of the feed roller 601.

[0070] While the variable pitch roller 501 releases the support column 203, the feeding power component 602 starts and drives the two feeding rollers 601 to rotate relative to each other, thereby sending out the released support column 203; while the variable pitch roller 501 rewinds the support column 203, the feeding power component 602 starts and causes the feeding roller 601 to send the support column 203 into the variable pitch cavity 2012.

[0071] Two feeding rollers 601 block the open and retracted portions of the support column 203, preventing filler from entering the retracted portion of the support column 203; at the same time, the feed port is sealed by the baffle 2013 and the sealing sleeve, thereby reducing the possibility of water seeping into the pitch chamber 2012.

[0072] In some embodiments, see Figure 1 and Figure 3 The sampling unit 40 includes a sampling box 401, multiple sampling seats 402, a bottle transport power component 403, sampling bottles 404, and a sealing plate 405. The sampling box 401 is fixed to the movable base 201. A sampling cavity 4011 is formed inside the sampling box 401. An annular bottle transport groove is formed on the inner wall of the sampling cavity 4011. An inlet 4013 communicating with the bottle transport groove is formed on the bottom wall of the sampling box 401. The sampling box 401 also has a bottle retrieval port 4014 communicating with the sampling cavity 4011. The multiple sampling seats 402... 02 is located in the bottle transport trough, and the sampling seat 402 is slidably connected to the sampling box 401 along the circumference of the bottle transport trough; the bottle transport power component 403 is driven to the sampling seat 402 and is used to drive the sampling seat 402 to move. The bottle transport power component 403 is a ring slide rail and has a slide seat 406 that corresponds one-to-one with the sampling seat 402; the sampling bottles 404 are correspondingly located in the sampling seat 402; the sealing plate 405 is located in the bottle opening 4014 and is detachably connected to the sampling box 401.

[0073] When the sampling bottle 404 is moved to align with the inlet 4013, both the bottle opening and the inlet 4013 are in the open state; at other times, both the bottle opening and the inlet 4013 are in the closed state.

[0074] Specifically, the diameter of the inlet 4013 near the sampling chamber 4011 is smaller than the diameter of the other end. An outer plug 4015 is provided inside the inlet 4013. The outer plug 4015 is slidably connected to the sampling box 401 in the vertical direction. A first elastic member 4016 is fixedly connected between the outer plug 4015 and the sampling box 401. The first elastic member 4016 has a pre-tightening force that causes the outer plug 4015 to block the inlet 4013. The first elastic member 4016 is a spring or a spring rod.

[0075] The sampling bottle 404 has an inner plug 4041 inside its opening. The inner plug 4041 is slidably connected to the sampling bottle 404 in the vertical direction. A second elastic member 4042 is fixedly connected between the inner plug 4041 and the sampling bottle 404. The second elastic member 4042 is designed to seal the opening of the sampling bottle 404 with the inner plug 4041. The second elastic member 4042 is a spring or a spring rod. The opening of the sampling bottle 404 is inserted into and adapted to the inlet 4013.

[0076] The sampling unit 40 also includes a slide 406, a sampling power component 407, and a probe 408. The slide 406 corresponds one-to-one with the sampling seat 402. The slide 406 is slidably connected to the sampling seat 402 in the vertical direction. The slide 406 is provided with an adsorption component for adsorbing and fixing the sampling bottle 404. The adsorption component is a vacuum electric suction cup. The sampling power component 407 is drivenly connected to the slide 406 and is used to drive the slide 406 to move. The sampling power component 407 is a linear module. The probe 408 extends in the vertical direction. The bottom end of the probe 408 extends into the sample inlet 4013 and is fixed to the outer plug 4015. The other end of the probe 408 extends into the bottle transport groove.

[0077] After the sampling box 401 is moved to the preset water depth, the bottle-carrying power unit 403 moves the sampling bottle 404 to the inlet 4013 via the sampling seat 402. Then, the sampling power unit 407 drives the sampling bottle 404 downward until the bottle mouth of the sampling bottle 404 is inserted into the inlet 4013. At this time, the probe 408 squeezes the inner plug 4041, creating a gap between the inner plug 4041 and the bottle mouth of the sampling bottle 404. Simultaneously, the inner plug 4041, through the probe 408, also squeezes the outer plug 4015, creating a gap between the outer plug 4015 and the inlet 4013, thus forming a liquid inlet channel, allowing the water sample at this depth to enter the sampling bottle 404.

[0078] After sampling is completed, the sampling power component 407 drives the sampling bottle 404 to move upward, so that the bottle mouth of the sampling bottle 404 is separated from the inlet 4013. At this time, the first elastic component 4016 and the second elastic component 4042 release their elasticity simultaneously, so that the outer plug 4015 blocks the inlet 4013, and the inner plug 4041 blocks the bottle mouth of the sampling bottle 404, thereby sealing the water sample inside the sampling bottle 404.

[0079] In some embodiments, see Figure 3 A water-proof cover 4017 is provided around the sample inlet 4013, and the water-proof cover 4017 is fixedly connected to the sampling box 401. A water-drawing unit 70 is provided in the bottle transport tank, which includes a water-drawing tank 701, a water-drawing pipe 702, and a water-drawing power component; the water-drawing tank 701 is fixedly connected to the sampling box 401; the water-drawing pipe 702 connects the sample inlet 4013 and the water-drawing tank 701; the water-drawing power component is used to draw the water sample remaining in the sample inlet 4013 into the water-drawing tank 701, and the water-drawing power component is a water pump.

[0080] After sampling, water may remain in the inlet 4013. The water shield 4017 prevents the residual water from entering the sampling chamber 4011. Then, the water is guided to the water tank 701 by the water guiding power component. This avoids mixing water samples of different depths during the next sampling and improves the accuracy of the test results.

[0081] In some embodiments, see Figure 3 A filter screen 4018 is installed inside the sample inlet 4013, and the filter screen 4018 is fixedly connected to the sampling box 401.

[0082] The filter screen 4018 filters out impurities from the river water, preventing them from entering the sampling bottle 404.

[0083] In some embodiments, see Figure 1 and Figure 4 The movable seat 201 has a pulling cavity 2014, and the pulling unit 30 corresponds to the fastening ring 202. The pulling unit 30 includes a pulling roller 301, a pulling power component 302, and a pulling rope 303. The pulling roller 301 is located in the pulling cavity 2014 and rotates around its own central axis. The pulling power component 302 is connected to the pulling roller 301 and is used to drive the pulling roller 301 to rotate. The pulling power component 302 is a servo motor. One end of the pulling rope 303 is fixed to the pulling roller 301, and the other end extends out of the pulling cavity 2014 and is fixed to the fastening ring 202.

[0084] When the pulling power component 302 is activated, the pulling roller 301 rotates, thereby causing the pulling roller 301 to wind up or unwind the pulling rope 303. The corresponding moving component is pulled to the moving seat 201 by the pulling rope 303. When the moving seat 201 moves, the pulling rope 303 is unwinded to avoid interfering with the moving seat 201.

[0085] In one possible implementation, see Figure 1 and Figure 5 The suspension rope 101 has a filling cavity 1011, which is connected to the pumping component.

[0086] The pumping unit pumps the filler into the filling cavity 1011, causing the suspension rope 101 to expand and increase its weight. After expansion, the suspension rope 101 is bidirectionally compressed with the fastening ring 202, thereby enhancing the connection stability between the fastening ring 202 and the suspension rope 101. With the increased weight of the suspension rope 101, in light winds, the rope 101 will not be blown away by the wind and will remain vertical, improving the accuracy of the sampling point.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drone flying device for river management that facilitates sewage sampling, characterized in that, include: The drone body has a suspension rope at the bottom and a retraction and release assembly for winding or unwinding the suspension rope; The moving unit includes a moving base and two moving components respectively disposed at the top and bottom of the moving base. The moving base has a through hole for the hoisting rope to pass through. The moving component includes a fastening ring sleeved on the hoisting rope, a support column connected between the fastening ring and the moving base, and a pumping component communicating with the support column. The support column is in communication with the fastening ring, and the pumping component is used to pump filler into the support column and the fastening ring. A pulling unit, corresponding to each of the fastening rings, is disposed between the movable seat and the fastening ring, and is used to pull the fastening rings toward the movable seat; as well as A sampling unit, connected to the movable base, is used to collect water samples; The movable seat has a pitch-changing cavity corresponding to each of the support columns, and a pitch-changing unit is provided in the pitch-changing cavity; The pitch unit includes: A pitch-changing roller, disposed within the pitch-changing cavity, is rotatably connected to the movable seat. The pitch-changing roller rotates about its own central axis, and the end of the support column away from the fastening ring is fixedly connected to the outer wall of the pitch-changing roller; and A variable pitch power component is connected to the variable pitch roller and is used to drive the variable pitch roller to rotate; Two baffles are fixedly connected to the opening of the pitch chamber. The line connecting the two baffles is perpendicular to the extension direction of the pitch roller. A feeding port for the support column to pass through is provided between the two baffles. A feeding unit is provided at the opening of the pitch cavity, and the feeding unit includes: Two feeding rollers are positioned correspondingly below the baffle. The sides of the two feeding rollers that are close to each other extend below the feeding port. A gap is left between the two feeding rollers for the support column to pass through. The feeding rollers are rotatably connected to the movable seat, and the rotation axis of the feeding rollers is parallel to the rotation axis of the variable pitch roller. The feeding power component is connected to the feeding roller and is used to drive the feeding roller to rotate.

2. The unmanned aerial vehicle (UAV) flight device for river management that facilitates sewage sampling as described in claim 1, characterized in that, A sealing sleeve is fixed to the outer periphery of the feeding roller, and the sealing sleeve extends along the axial direction of the feeding roller.

3. The unmanned aerial vehicle (UAV) flight device for river management that facilitates sewage sampling as described in claim 1, characterized in that, The sampling unit includes: A sampling box is fixedly connected to the movable base. The sampling box has a sampling cavity inside. The inner wall of the sampling cavity has an annular bottle transport groove. The bottom wall of the sampling box has a sample inlet communicating with the bottle transport groove. The sampling box also has a bottle retrieval port communicating with the sampling cavity. Multiple sampling seats are disposed in the bottle transport trough, and the sampling seats are slidably connected to the sampling box along the circumference of the bottle transport trough; A bottle-carrying power component is connected to the sampling seat and is used to drive the sampling seat to move; Sampling bottles are arranged one-to-one with the sampling base; and A sealing plate is provided inside the bottle opening, and the sealing plate is detachably connected to the sampling box; Specifically, when the sampling bottle is moved to align with the inlet, both the bottle opening and the inlet are in the open state; at other times, both the bottle opening and the inlet are in the closed state.

4. The unmanned aerial vehicle (UAV) flight device for river management that facilitates sewage sampling as described in claim 3, characterized in that, The diameter of the inlet near the sampling chamber is smaller than the diameter of the other end. An outer plug is provided inside the inlet. The outer plug is slidably connected to the sampling box in the vertical direction. A first elastic member is fixed between the outer plug and the sampling box. The first elastic member has a pre-tightening force that causes the outer plug to seal the inlet. The sampling bottle has an inner plug inside its opening. The inner plug is slidably connected to the sampling bottle in the vertical direction. A second elastic member is fixed between the inner plug and the sampling bottle. The second elastic member is designed to allow the inner plug to seal the opening of the sampling bottle. The opening of the sampling bottle is plugged into and adapted to the inlet. The sampling unit further includes: A sliding base, corresponding one-to-one with the sampling base, is slidably connected to the sampling base in the up-down direction, and the sliding base is provided with an adsorption element for adsorbing and fixing the sampling bottle; A sampling power component, driven by a slide block, is used to drive the slide block to move; and The probe extends vertically, with its bottom end inserted into the injection port and fixed to the outer plug, and its other end inserted into the transport bottle groove.

5. The unmanned aerial vehicle (UAV) flight device for river management that facilitates sewage sampling as described in claim 4, characterized in that, A water-proof cover is provided around the sample inlet, and the water-proof cover is fixedly connected to the sampling box; The bottle transport trough is equipped with a water intake unit, which includes: A water inlet tank is fixedly connected to the sampling box; A water inlet pipe, connecting the sample inlet and the water inlet tank; and A water-drawing power unit is used to divert the residual water sample in the inlet to the water-drawing tank.

6. The unmanned aerial vehicle (UAV) flight device for river management that facilitates sewage sampling as described in claim 3, characterized in that, The inlet is equipped with a filter screen, which is fixedly connected to the sampling box.

7. The unmanned aerial vehicle (UAV) flight device for river management that facilitates sewage sampling as described in claim 1, characterized in that, The movable seat has a pulling cavity, and the pulling unit corresponds one-to-one with the fastening ring; The pulling unit includes: A pulling roller is disposed inside the pulling cavity, and the pulling roller rotates around its own central axis; A pulling force component, connected to the pulling roller, is used to drive the pulling roller to rotate; and The pull rope has one end fixedly connected to the pull roller, and the other end extends out of the pull cavity and is fixedly connected to the fastening ring.

8. The unmanned aerial vehicle (UAV) flight device for river management that facilitates wastewater sampling as described in claim 1, characterized in that, The suspension rope has a filling cavity, which is connected to the pumping component.

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