LU502250B1 - Unmanned aerial vehicle water sample collection device for water quality monitoring - Google Patents

Abstract

There is an abdominal portion of the seaplane is fixedly provided a cabinet with openings on both bottom and front portions thereof, an inner side of the cabinet is rotatably provided with a first rotating shaft perpendicular to a body of the seaplane, outside the first rotating shaft is detachably provided a rotating roller, outside the rotating roller are coiled a plurality of sampling boxes in a shape of a chain, among the plurality of sampling boxes are connected connecting assemblies successively, the connecting assemblies not only can make each two adjacent sampling boxes deflect to one side where the rotating roller is, but also can make the plurality of sampling boxes deflect along two extension directions of an axis of the rotating roller, each of the plurality of sampling boxes comprises two cavities, and tail ends of the plurality of sampling boxes are all provided with elastic valve assemblies.

Description

DESCRIPTION 0502250

Unmanned aerial vehicle water sample collection device for water quality monitoring Technical Field The present invention relates to the technical field of water quality sampling equipment, in particular to an unmanned aerial vehicle water sample collection device for water quality monitoring.

Background Technology At present, water sample collection in water quality monitoring is generally carried out manually or by unmanned aerial vehicles.

Manual collection is not only limited by the environment, but also workload is large and operations are difficult and dangerous, therefore, water sample collection conducted by unmanned aerial vehicles is comparatively more advantageous due to its convenience.

When it comes to water sample collection at different depths, vertical lifting collectors of the existing unmanned aerial vehicles are mostly applied.

However, the vertical collectors mostly occupy a large space at lower portions of the unmanned aerial vehicles, which is prone to affect flight of the unmanned aerial vehicles and also inconvenient to transport water samples.

At the same time, after collecting water samples, most of the water samples need to be transferred several times, which is liable to be contaminated; moreover, one water sample is generally collected for sorting and monitoring, and when a water sample is contaminated during a transfer process, the entire water sample is unusable and another sample has to be collected, which requires a lot of work.

Summary of the Invention In order to solve problems existing in prior art, such as it is difficult to collect water samples at a same location but at different depths, one water sample collected at a time can easily be polluted, and so on, the present invention provides an unmanned aerial vehicle water sample collection device for water quality monitoring.

The present invention is implemented through following technical solutions: 0502250 An unmanned aerial vehicle water sample collection device for water quality monitoring, comprises a seaplane, wherein an abdominal portion of the seaplane is fixedly provided a cabinet with openings on both bottom and front portions thereof, an inner side of the cabinet is rotatably provided with a first rotating shaft perpendicular to a body of the seaplane, outside the first rotating shaft is detachably provided a rotating roller, outside the rotating roller are coiled a plurality of sampling boxes in a shape of a chain, one of the plurality of sampling boxes located at a tail end is hinged outside the rotating roller, among the plurality of sampling boxes are connected connecting assemblies successively, through the connecting assemblies each two adjacent sampling boxes are capable of deflecting to one side where the rotating roller is, and the plurality of sampling boxes are able to deflect along two extension directions of an axis of the rotating roller, inside each of the plurality of sampling boxes are provided two symmetrical cavities along an axis thereof, and tail ends of the plurality of sampling boxes are all provided with elastic valve assemblies which communicate with corresponding cavities, the elastic valve assemblies are symmetrically distributed with the connecting assemblies as centers, and initially, the elastic valve assemblies seal off corresponding sampling boxes; inside the cabinet is provided a second power device driving the rotating roller to rotate, another inner side of the cabinet is rotatably connected to three second rotating shafts which are evenly distributed front and rear, the second rotating shafts and the rotating roller are distributed front and rear along the body of the seaplane, outside the second rotating shafts are all fixedly arranged line rollers, outside the line rollers are all wound a plurality of coils of drawstrings, an end of each of the drawstrings is fixedly connected to one of the corresponding line rollers, another end of each of the drawstrings is sequentially connected to front, middle and rear sides of a sampling box located at a head end detachably and by fixing structures in an order that the second rotating shafts are distributed along the axis of the rotating roller, inside the cabinet are arranged first power devices corresponding to each of the second rotating shafts, the first power devices drive the second rotating shafts to rotate, and when the drawstrings located at both front and rear sides are drawn individually to deflect each two adjacent sampling boxes to form a certain angle, the elastic valve assemblies on corresponding sides are opened.

Further, the connecting assemblies comprise first grooves opened on adjacent sides of each two adjacent sampling boxes, the first grooves have isosceles trapezoidal transverse sections, sides of the first grooves near middle portions of the sampling boxes are narrower than outer sides thereof, inside the first grooves are all hinged connecting blocks, where the connecting blocks are hinged are all installed with torsional springs, the connecting blocks are able to deflect along hinge points towards a direction of the axis of the rotating roller, the connecting blocks corresponding to each two adjacent sampling boxes are connected through connecting shafts and pins, where the pins connect each two adjacent connecting blocks are all installed with torsional springs, and each two adjacent sampling boxes are able to deflect along where pins connect towards one side where the rotating roller 1s.

Further, the elastic valve assemblies comprise tapered first through-holes communicated internally with two cavities of each sampling box respectively, inner diameters of the first through-holes at a side near middle portions of the sampling boxes are larger than inner diameters at an outer side, inside the first through-holes are all provided tapered stopples, inside the cavities are all fixedly installed connecting rods, between the connecting rods and inner sides of corresponding stopples are all fixedly installed springs, outer sides of the stopples are all fixedly installed first elastic telescopic rods whose movable ends face outwards, the first elastic telescopic rods are less elastic than the springs, the stopples seal corresponding first through-holes when the springs normally extend, middle portions at tail ends of the sampling boxes are all fixedly installed with limiting blocks, and the limiting blocks are respectively located on one side of corresponding first elastic telescopic rods away from the rotating roller. Further, on an inner top surface of the cabinet are provided a plurality of second grooves which are evenly distributed in front and rear, inside the plurality of second grooves are all fixedly installed second elastic telescopic rods whose moveable ends face downwards, the plurality of second elastic telescopic rods are all located directly above the rotating roller, the moveable ends of the second elastic telescopic rods are all fixedly installed with curved plates whose concave sides face downwards, the curved plates are arranged outside the sampling boxes, and the second’ 502250 elastic telescopic rods are always in a compressed state.

Further, the sampling boxes are made of transparent materials.

Further, the connecting and fixing structures comprise self-locking hooks fixedly installed on another ends of the drawstrings, and circular rings fixedly installed on front ends, middle portions and two sides of the sampling box located at the head end, and the self-locking hooks corresponding to the drawstrings are respectively hooked and connected to corresponding circular rings according to the order that the second rotating shafts are distributed along the axis of the rotating roller.

The present invention has following beneficial effects: Compared with a traditional vertical lift sampler, the sampling boxes in the present invention coiled outside a rotating roller are dropped and reeled to collect water samples, and sampling boxes are stored inside a cabinet after collection, which facilitates movements and landing of an unmanned aerial vehicle, meanwhile, a seaplane with a pontoon serves as a main body of the unmanned aerial vehicle in the present invention, so that the present invention can move on the surface of water by means of the pontoon, and three drawstrings are detachably connected to a head end of a sampling box located at a head end along front and rear directions of rotating shafts, which makes it easy to disassemble the rotating roller and the coiled water sample boxes entirely, and convenient for transporting and transferring water samples, thereby effectively reducing times of transferring water samples, and lowering the risk of water sample contamination; further, a second rotating shaft in middle rotates to pull a drawstring in middle, and with cooperation of limiting blocks, sampling boxes in the water are in a vertical state, then drawstrings on both sides are reeled to deflect the sampling boxes and change an area that the sampling boxes contact water, under an action of the drawstrings, the sampling boxes at lower portions of the cabinet are equivalent to masts of a ship, so as to adjust moving directions of the seaplane on the surface of water, and the seaplane can accurately move to positions of water

. . . . . LU502250 sample collection; and second rotating shafts cooperate with the drawstrings, on sampling boxes and an opposite side of sampling boxes adjacent to front sides thereof are provided elastic valve assemblies which comprise first elastic telescopic rods and have elastic stroke distances at both ends of springs, so that the first elastic telescopic rods are compressed by the drawstrings to adjust movements of the seaplane on water, when water samples need to be collected, the drawstrings are further tightened, the sampling boxes are drawn and continue to deflect along where the connecting blocks are hinged, then the springs are compressed to uncork the stopples, after then water enters cavities via first through-holes and the water is collected; and throughout the sampling process, the sampling boxes are respectively deflected to each side by the drawstrings at both sides, and water samples are collected by two cavities of each sampling box, which makes collected water samples more comparative and representative, and at the same time, there is no need to repeat sampling when one of water samples is contaminated.

Brief Description of the Drawings Figure 1 shows an entire structure of the present invention.

Figure 2 shows an inner structure of a cabinet in Figure 1. Figure 3 is an enlarged view of Figure 2 from a direction “A”. Figure 4 is an enlarged view of Figure 2 from a direction “B”. Figure 5 is an enlarged view of a part “I” in Figure 2. Figure 6 is an enlarged view of a part “IT” in Figure 3. Figure 7 shows a state when the present invention runs.

The markups of the present invention are indicated as follows: 1-seaplane;

2-cabinet: LU502250 3-rotating roller; 4-sampling box; 5-link block; 6-first groove; 7-second rotating shaft; 8-line roller; 9-drawstring; 10-cavity; 11-a first through-hole; 12-stopple; 13-a first elastic telescopic rod; 14-connecting rod; 15-spring; 16-second groove; 17-a second elastic telescopic rod; 18-curved plate; 19-first rotating shaft; 20-circular ring; and 21-self-locking hook.

Specific Embodiments In order to facilitate the understanding of the present invention by those skilled in the art, specific embodiments of the present invention are described below with reference to the accompanying drawings.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Obviously, the described embodiments are only some embodiments of the present invention rather than all of them.

Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in the field without making any 905250 creative labor shall belong to protection scope of the present invention.

In the description of the present invention, it should be noted that orientation or position relationships indicated by terms like "middle", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and so on are based on orientation or position relationships shown in the attached drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or component referred to must have, be constructed and operated in a particular orientation, and shall not be construed as a limitation of the present invention.

In addition, terms such as "first", "second" and "third" are used for descriptive purposes only and are not to be understood to indicate or imply relative importance.

It should be noted that when a component is said to be "installed" on another component, it may be directly on another component or it may exist in a central component.

When a component is said to be "provided on" another component, it can be set directly on another component or it may coexist with a centered component.

When a component is said to be "fixed" to another component, it may be fixed directly to another component or may coexist with a centered component.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

The terms used herein in the specification of the present invention are intended only to describe specific embodiments and are not intended to limit the present invention.

The term "or/and" as used herein includes any and all combinations of one or more related listed items.

As shown in Figure 1, the present invention provides an unmanned aerial vehicle water sample collection device for water quality monitoring, comprising an unmanned seaplane 1, wherein the seaplane 1 capable of moving on the surface of water serves as a main body, and a pontoon of the seaplane 1 can float on the surface of water so that the seaplane 1 move on the surface of water by means of the pontoon; at an abdominal portion of the seaplane 1 is fixedly provided a 502250 cabinet 2 with openings on both bottom and front portions thereof, an inner front side of the cabinet 2 is rotatably provided with a first rotating shaft 19 perpendicular to a body of the seaplane 1, outside the first rotating shaft 19 is detachably provided a rotating roller 3, outside the rotating roller 3 are coiled a plurality of sampling boxes 4 in a shape of a chain, one of the plurality of sampling boxes 4 located at a tail end is hinged outside the rotating roller 3, as shown in Figure 2, the detachable rotating roller 3 is arranged outside the first rotating shaft 19 so that the rotating roller 3 and the sampling boxes 4 around outer portions thereof can be removed entirely after collection, thereby facilitating transferring and transporting water samples, reducing times of transferring water samples, and lowering the risk of water sample contamination; on neighboring sides of each two adjacent sampling boxes 4 are all opened first grooves 6 having isosceles trapezoidal transverse sections, an opening of each of the first grooves 6 is wider than one side of each of the first grooves near a middle portion of each of the sampling boxes 4, inside the first grooves 6 are all hinged connecting blocks 5, the connecting blocks 5 are able to deflect along extension directions of both ends of an axis of the first rotating shaft 19, and Figure 3 shows a top view, inside the cabinet 2 is provided a second power device driving the first rotating shaft 19, inside the first grooves 6 are all hinged the connecting blocks 5 so that one side of the sampling boxes 4 attaches to outer portions of the rotating roller 3 more closely when the sampling boxes 4 are reeled, meanwhile, the first grooves 6 have isosceles trapezoidal transverse sections so as to limit angles that the connecting blocks 5 deflect along a direction of an axis of the first rotating shaft 19, the connecting blocks 5 deflect to a biggest angle when the connecting blocks 5 firmly attach to corresponding lateral sides of the first grooves 6; and where the connecting blocks 5 are hinged to the first grooves are all installed with torsional springs, so that the connecting blocks 5 are initially in a state perpendicular to the sampling boxes 4, and each two adjacent sampling boxes 4 are in a state of flush on outsides under an action of the torsion springs; each two connecting blocks 5 between each two adjacent sampling boxes 4 are connected through pins and connecting shafts which are parallel to the first rotating shaft 19, where the pins connect each two adjacent connecting blocks are all installed with torsional springs, each two adjacent sampling boxes 4 are connected though the connecting blocks 5 and the pins so that each two adjacent sampling boxes can be reeled along the pins and be coiled around the outer portions of the rotating roller 3, the torsional springs are arranged at 902250 where the pins connect, so that sampling boxes 4 in an initial state are coiled around rotating roller 3 under the action of torsion springs, and the connecting blocks 5 are respectively hinged to the first grooves 6 corresponding to the sampling boxes 4, so that each two adjacent sampling boxes 4 can deflect along extension directions of both ends of the axis of the rotating roller 3. Tail ends of the sampling boxes 4 are all fixedly installed with limiting blocks 22, the limiting blocks 22 are all arranged at one side of corresponding connecting blocks 5 away from the rotating roller 3, and the limiting blocks 22 are arranged to limit angles that each two adjacent connecting blocks 5 turn to one side away from the rotating roller 3. On an inner top surface of the cabinet 2 are provided a plurality of second grooves 16 which are evenly distributed along a radial direction of rotating roller 3, inside the plurality of second grooves 16 are all fixedly installed second elastic telescopic rods 17 whose moveable ends face downwards, lower ends of the second elastic telescopic rods 17 are all fixedly installed with curved plates 18 whose concave sides face downwards, as shown in Figure 5, the curved plates 18 are coaxial with the rotating roller 3, the second elastic telescopic rods 17 are always in a compressed state so that the curved plates 18 are always pushed downward, and the concave sides of the curved plates 18 always contact outsides of the sampling boxes 4 below, when the first rotating shaft 19 drives the rotating roller 3 to rotate and roll up the sampling boxes 4, the curved plates 18 are pushed downward till sampling boxes 4 outside the rotating roller 3 are reeled, then the sampling boxes 4 and the connecting blocks 5 rotate along the connecting shafts so that the sampling boxes 4 are attached to outsides of the rotating roller 3, and in the process of rolling up sampling boxes 4, the curved plates 18 can move up along with the second elastic telescopic rods 17, so as to ensure that sampling boxes 4 are completely coiled outside the rotating roller 3, of course, springs or other structures can also be the second elastic telescopic rods 17 herein, as long as having same functions.

An inner side of the cabinet 2 close to a nose of the seaplane 1 is rotatably provided with three second rotating shafts 7 which are evenly distributed front and rear, outside the second rotating shafts 7 are all fixedly arranged line rollers 8, as shown in Figure 4, the three second rotating. 902250 shafts 7 are all parallel to the rotating roller 3, outside the line rollers 8 are all wound a plurality of coils of drawstrings 9, an end of each of the drawstrings 9 is fixedly connected to one of the corresponding line rollers 8, another end of each of the drawstrings 9 is all detachably connected outside a tail end of a sampling box located at a head end, and the drawstrings 9 are sequentially connected to front, middle and rear sides of the sampling box located at the head end, meanwhile, inside the cabinet 2 are arranged first power devices corresponding to each of the second rotating shafts 7, the first power devices respectively drive corresponding second rotating shafts 7 to rotate, and the three second rotating shafts 7 are respectively driven by the first power devices to rotate so that the drawstrings 9 coiled around the line rollers 8 can be uncoiled or reeled.

On another ends of the drawstrings 9 are all fixedly installed self-locking hooks 20, on front, middle and two lateral sides of the sampling box located at the head end are all fixedly installed circular rings 21, the three drawstrings 9 are respectively hooked and connected to circular rings 21 located at front, middle and rear sides according to a sequence that the three second rotating shafts 7 are distributed along an axis of the first rotating shaft 19, the drawstrings 9 are detachably connected to the circular rings 21 in one-to-one correspondence so as to facilitate removal of the rotating roller 3 and the sampling boxes 4 coiled outside the rotating roller 3 when sampling is completed, of course, the drawstring 9 and the sampling box 4 located at the head end can be detachably connected, clamp connected, etc., as long as same effects are achieved.

Each of the sampling boxes 4 is provided with two cavities 10 symmetrically distributed front and rear for holding water samples, each two cavities inside a same sampling box are located on either sides of the connecting blocks 5 so that an amount of water sampled at a same depth equals to a capacity of two cavities; as shown in figure 3, tapered first through-holes 11 are provided at a tail end of each sampling box 4 corresponding to each cavity 10, an inner diameter of each first through-hole 11 close to an inner portion of each cavity 10 is larger than an outer diameter thereof, inside the first through-holes 11 are all provided tapered stopples 12 for sealing, outer ends of the stopples 12 are all fixedly installed first elastic telescopic rods 13 whose movable ends face outwards, axes of two first elastic telescopic rods 13 at the tail end of each 502250 sampling box 4 are coplanar with axes of corresponding first grooves 6 respectively, and the two first elastic telescopic rods 13 are symmetrically distributed front and rear along the axes of the corresponding first grooves 6, as shown in Figure 6, the first elastic telescopic rods 13 are arranged so that the drawstrings 9 can pull the sampling boxes 4 to deflect along where the connecting blocks 5 are hinged and adjust moving directions of the seaplane 1 on water, and the first elastic telescopic rods 13 serve as first strokes of deflections of the sampling boxes 4, so as to ensure that the stopples 12 are corked, each two first elastic telescopic rods 13 of each sampling box 4 are located on front and rear sides of corresponding first grooves 6, inside the cavities 10 are all fixedly installed connecting rods 14, between the connecting rods 14 and inner ends of corresponding stopples are all fixedly installed springs 15, the springs 15 are more elastic than the first elastic telescopic rods 13 so that the first through-holes 11 are corked under actions of the springs 15 in a process of adjusting moving directions of the seaplane 1, when water is injected into the cavities 10 for sampling, the drawstrings 9 are reeled to first overcome elastic forces of the first elastic telescopic rods 13, and the springs 15 are pushed to uncork the first through-holes 11, that is to say, a process of reeling the drawstrings can be divided into two stages, a first stage is to contract the first elastic telescopic rods 13 so that a moving direction of the seaplane 1 is adjusted, and a second stage is to compress the springs 15 so that the first through-holes 11 are uncorked for sampling water; initially, all the sampling boxes 4 are coiled outside the rotating roller 3, all the first through-holes are corked by corresponding stopples 12, and all the drawstrings 9 are rolled up, when the seaplane 1 floats over the surface of water and moves, the rotating roller 3 is rotated so that the first power devices can drive three second rotating shafts 7 to unreel corresponding drawstrings 9 simultaneously, and the coiled sampling boxes 4 are gradually dropped down to the surface of water, as shown in Figure 1, when the seaplane 1 needs to slow down in the water, firstly, the first power devices drive a second rotating shaft 7 located in middle to gradually tighten a corresponding drawstring in middle, since limiting blocks 22 are all fixedly installed at tail ends of the sampling boxes 4, outer ends of the limiting blocks 22 push corresponding sides of adjacent sampling boxes 4 when the drawstring 9 in middle is tightened up, so that the sampling boxes 4 and the connecting blocks 5 can no longer deflect along the connecting shafts to a side away from the rotating roller 3, and a plurality of sampling boxes 4 below the rotating roller 3 are drawn to a nearly vertical state, and 902250 at this time, all the first elastic telescopic rods 13 are in a contraction state, and all the stopples 12 cork the corresponding first through-holes 11, as shown in figure 7, the sampling boxes 4 are under the surface of water, in the process that the seaplane 1 moves over water, the sampling boxes 4 are equivalent to masts of a boat equipped with canvas, which realize deceleration and braking of the seaplane 1, for example, when the seaplane 1 in figure 1 driving forward needs to veer to a left side, a second rotating shafts 7 on the left needs to be rotated slowly so that a drawstring 9 on the left are gradually tightened up, and all sampling boxes 4 are deflected to the left side along where the connecting blocks 5 are hinged, and at this time, an area that right sides of the sampling boxes 4 contacts water increases, and first elastic telescopic rods 13 at left sides of the sampling boxes 4 are compressed under an action of the drawstring 9, and the moving direction of the seaplane 1 on the surface of water is correspondingly and slowly adjusted by all the stopples 12. The sampling boxes 4 can be made of transparent materials, and colors of water samples inside the cavities can be directly observed through transparent sampling boxes, so that physical properties of the water samples can be analyzed firstly.

When the seaplane 1 moves to a designated sampling point to collect water samples at different depths, the sampling boxes 4 are in a state as shown in figure 7, firstly a second rotating shaft 7 at a front side is driven by corresponding first power device so that a drawstring 9 at a front side is quickly tightened, in the process of tightening the drawstring 9, a sampling box 4 located at the head end deflects along where the connecting blocks 5 and the first grooves 6 are hinged to a front side of the axis of the rotating roller 3, then the drawstring 9 goes on being tightened, due to isosceles trapezoidal sections of the first grooves 6, the connecting blocks 5 are drawn by the drawstring 9 to deflect till firmly attaching to inner front walls of the first grooves 6, and the first elastic telescopic rods 13 are completely compressed, adjacent sampling boxes 4 located at the front side push the first elastic telescopic rods 13 to move to inner insides of the cavities 10 under actions of the drawstrings 9, the springs 15 are compressed and the stopples 12 uncork the first through-holes 11, and water enters into the cavities 4 via the first through-holes 11, after water is collected by the sampling boxes 4, the drawstring 9 at the front side is gradually released 502250 and the stopples 12 gradually cork the first through-holes 11 under actions of the springs 15 to finish sampling of cavities 10 at front sides; then a drawstring 9 at a rear side is quickly tightened, and the above operations are repeated to uncork the first through-holes 11 at the rear side, so that cavities 10 at both sides of the sampling boxes 4 collect water samples at a corresponding depth, and water samples at a same depth are collected by two cavities 10 of each sampling box 4, which makes collected water samples more representative, at the same time, comparative experiments can be carried out to ensure accuracy of water quality monitoring, after sampling, the second power device drives the first rotating shaft 19 to rotate, the first rotating shaft 19 rotates to drive the rotating roller 3 to rotate accordingly, and the sampling boxes 4 containing water samples are pushed by the curved plates 18 to coil around the rotating roller 3, so that the seaplane 1 completes collection of water samples; and when the water samples need to be taken out, the rotating roller 3 and the sampling boxes coiled outsides thereof can be removed and transferred entirely, and the sampling boxes 4 are opened one by one to take out water samples for testing, which can reduce times of taking out and transferring water samples, and lowering the risk of contamination, further a plurality of sets of rotating rollers 3 and sampling boxes 4 can be arranged at a same time, so as to perform continuous sampling operations.

The embodiments of the present invention described above do not limit protection scope of the present invention.

Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (6)

CLAIMS LU502250

1.An unmanned aerial vehicle water sample collection device for water quality monitoring, comprising a seaplane, wherein at an abdominal portion of the seaplane is fixedly provided a cabinet with openings on both bottom and front portions thereof, an inner side of the cabinet is rotatably provided with a first rotating shaft perpendicular to a body of the seaplane, outside the first rotating shaft is detachably provided a rotating roller, outside the rotating roller are coiled a plurality of sampling boxes in a shape of a chain, one of the plurality of sampling boxes located at a tail end is hinged outside the rotating roller, among the plurality of sampling boxes are connected connecting assemblies successively, through the connecting assemblies each two adjacent sampling boxes are capable of deflecting to one side where the rotating roller is, and the plurality of sampling boxes are able to deflect along two extension directions of an axis of the rotating roller, inside each of the plurality of sampling boxes are provided two symmetrical cavities along an axis thereof, and tail ends of the plurality of sampling boxes are all provided with elastic valve assemblies which communicate with corresponding cavities, the elastic valve assemblies are symmetrically distributed with the connecting assemblies as centers, and initially, the elastic valve assemblies seal off corresponding sampling boxes; inside the cabinet is provided a second power device driving the rotating roller to rotate, another inner side of the cabinet is rotatably connected to three second rotating shafts which are evenly distributed front and rear, the second rotating shafts and the rotating roller are distributed front and rear along the body of the seaplane, outside the second rotating shafts are all fixedly arranged line rollers, outside the line rollers are all wound a plurality of coils of drawstrings, an end of each of the drawstrings is fixedly connected to one of the corresponding line rollers, another end of each of the drawstrings is sequentially connected to front, middle and rear sides of a sampling box located at a head end through detachable connecting and fixing structures in an order that the second rotating shafts are distributed along the axis of the rotating roller, inside the cabinet are arranged first power devices corresponding to each of the second rotating shafts, the first power devices drive the second rotating shafts to rotate, and the drawstrings located at both front and rear sides are drawn individually to deflect each two adjacent sampling boxes to form a certain angle, the elastic valve assemblies on corresponding sides are opened.

2. The unmanned aerial vehicle water sample collection device for water quality monitoring 909250 according to claim 1, wherein the connecting assemblies comprise first grooves opened on adjacent sides of each two adjacent sampling boxes, the first grooves have isosceles trapezoidal transverse sections, sides of the first grooves near middle portions of the sampling boxes are narrower than outer sides thereof, inside the first grooves are all hinged connecting blocks, where the connecting blocks are hinged are all installed with torsional springs, the connecting blocks are able to deflect along hinge points towards a direction of the axis of the rotating roller, the connecting blocks corresponding to each two adjacent sampling boxes are connected through connecting shafts and pins, where the pins connect each two adjacent connecting blocks are all installed with torsional springs, and each two adjacent sampling boxes are able to deflect along where pins connect towards one side where the rotating roller is.

3. The unmanned aerial vehicle water sample collection device for water quality monitoring according to claim 1, wherein the elastic valve assemblies comprise tapered first through-holes communicated internally with two cavities of each sampling box respectively, inner diameters of the first through-holes at a side near middle portions of the sampling boxes are larger than inner diameters at an outer side, inside the first through-holes are all provided tapered stopples, inside the cavities are all fixedly installed connecting rods, between the connecting rods and inner sides of corresponding stopples are all fixedly installed springs, outer sides of the stopples are all fixedly installed first elastic telescopic rods whose movable ends face outwards, the first elastic telescopic rods are less elastic than the springs, the stopples seal corresponding first through-holes when the springs normally extend, middle portions at tail ends of the sampling boxes are all fixedly installed with limiting blocks, and the limiting blocks are respectively located on one side of corresponding first elastic telescopic rods away from the rotating roller.

4. The unmanned aerial vehicle water sample collection device for water quality monitoring according to any of claim 1~3, wherein on an inner top surface of the cabinet are provided a plurality of second grooves which are evenly distributed front and rear, inside the plurality of second grooves are all fixedly installed second elastic telescopic rods whose moveable ends 902250 face downwards, the plurality of second elastic telescopic rods are all located directly above the rotating roller, the moveable ends of the second elastic telescopic rods are all fixedly installed with curved plates whose concave sides face downwards, the curved plates are arranged outside the sampling boxes, and the second elastic telescopic rods are always in a compressed state.

5. The unmanned aerial vehicle water sample collection device for water quality monitoring according to any of claim 1~3, wherein the sampling boxes are made of transparent materials.

6. The unmanned aerial vehicle water sample collection device for water quality monitoring according to any of claim 1~3, wherein the connecting and fixing structures comprise self-locking hooks fixedly installed on another ends of the drawstrings, and circular rings fixedly installed on front ends, middle portions and two sides of the sampling box located at the head end, and the self-locking hooks corresponding to the drawstrings are respectively hooked and connected to corresponding circular rings according to the order that the second rotating shafts are distributed along the axis of the rotating roller.