A UAV seawater sampling device with multi-point separation function

Abstract

This invention belongs to the field of seawater monitoring technology, specifically a UAV seawater sampling device with multi-point separation function. Addressing the issue that the inability to separate water samples after sampling prevents multi-point sampling in different areas and necessitates repeated trips, this invention proposes the following solution: a base box with an internally fixed base having four equidistant annular mounting slots. This invention discloses a UAV seawater sampling device with multi-point separation function that can separate and store seawater samples from different areas, enabling multi-point sampling in different regions without repeated trips. Multiple sample storage tubes are installed in an annular and outward-expanding manner, maintaining the base box's center of gravity after sampling (increasing overall weight), ensuring the stability of the UAV flight operation, and preventing the sampled seawater from being concentrated in a single location, causing a shift in the UAV's center of gravity and affecting its flight performance.

Description

Technical Field

[0001] This invention relates to the field of seawater monitoring technology, and in particular to a UAV seawater sampling device with multi-point separation function. Background Technology

[0002] Seawater is a complex, multi-component, multiphase system, containing various organic and inorganic, dissolved and suspended substances, with a content of approximately 3.5%. The content of each component varies considerably. The purpose of seawater sampling is to collect water samples from water bodies and obtain basic data about the water body through analysis and measurement. The water samples used for analysis should be representative and reflect the chemical composition and characteristics of the water body. Seawater sampling and testing can better enable the management and protection of seawater resources based on actual conditions.

[0003] Unmanned aerial vehicles (UAVs) are unmanned aircraft controlled by radio remote control equipment and onboard program control devices, or operated autonomously by an onboard computer, either completely or intermittently. They have advantages such as small size, low cost, ease of use, and strong survivability. Using UAVs for seawater sampling can reduce the cost of traditional sampling, meet the needs of high-frequency water sampling technology, and facilitate effective monitoring.

[0004] When sampling ocean water, drones are usually floated on the water surface and then negative pressure sampling is carried out. Since the water source cannot be separated after sampling, it is not possible to sample at multiple points in different areas. It is necessary to go back and forth repeatedly to take the original sample and then take samples at different locations. Therefore, the sampling process is cumbersome and the overall sampling efficiency is low. Summary of the Invention

[0005] This invention discloses a UAV seawater sampling device with multi-point separation function, which aims to solve the technical problem in the background art where the water source storage after sampling cannot be separated, resulting in the inability to conduct multi-point sampling in different areas, requiring repeated trips to remove the original sample and then collect samples at different locations, thus leading to a cumbersome sampling process and low overall sampling efficiency.

[0006] This invention proposes a UAV seawater sampling device with multi-point separation function, comprising a base box, an internal seat fixedly connected inside the base box, and four equidistant annular mounting grooves on the internal seat. Each of the four annular mounting grooves has a sample storage tube fixedly connected inside, and each sample storage tube has an inlet and an outlet. The inlet is located above the sample storage tube, and the inlets on the four sample storage tubes are located in different positions. The outlets on the four sample storage tubes are horizontally placed, and each of the four outlets is externally connected to a cap via a threaded connection. A rectangular groove is formed at the bottom of the internal seat, located at the four outlet positions. A flip-top is movably connected inside the rectangular groove. A central platform is provided in the middle of the internal seat, and four circumferentially equidistant support frames are fixedly connected to the outside of the central platform. The other ends of the four support frames are fixedly connected to the internal seat.

[0007] The device is equipped with a base box, an internal seat, sample storage tubes, an inlet, an outlet, a cap, a flip-top, a central platform, and a support frame. The multiple sample storage tubes inside the base box can separate and store seawater samples from different areas, enabling multi-point sampling from different areas without repeated back-and-forth operations. The multiple sample storage tubes are installed in a ring-shaped and outward-expanding manner, which can maintain the center of gravity of the base box after sampling (increasing the overall weight of the base box), ensuring the stability of the UAV flight operation and preventing the seawater samples from being concentrated in a single location, causing the UAV's center of gravity to shift and affecting its flight performance. The flip-top and cap facilitate the centralized collection of seawater samples after sampling, improving the ease of use of the device.

[0008] In a preferred embodiment, four leak-proof components are provided above the sample storage tube, and the four leak-proof components are distributed equidistantly in a circle. Each leak-proof component includes a connecting tube and a side mount. The connecting tube is a hollow circular tube with a liquid outlet at its bottom. A lower liquid pipe is fixedly connected inside the liquid outlet. The lower end of the lower liquid pipe is fixedly connected to the liquid inlet of the sample storage tube below. A movable plug is movably connected inside the connecting tube. A push rod is fixedly connected to the side of the movable plug away from the central platform. The other end of the push rod passes through one side wall of the connecting tube and is fixedly connected to an attachment plate. A protrusion is provided on the attachment plate. The side mount is fixedly connected to the inner wall of the bottom box. A return spring is fixedly connected to the side mount near the connecting tube. The other end of the return spring is fixedly connected to the protrusion.

[0009] By incorporating a leak-proof component, the liquid outlet of the connecting tube can be sealed after sampling, preventing the sample storage tube from shaking due to the drone's flight operation after sampling, which could cause the seawater inside the sample storage tube to leak out, thereby wetting the inside of the device and affecting the normal operation of the internal components. The elasticity of the reset spring is used to provide the reverse driving force for the movable plug to reset, which can ensure the feasibility of the sampling operation while achieving the sealing operation.

[0010] In a preferred embodiment, a rotating disk is movably connected to the upper side of the central platform. A circular hole is opened in the middle of the rotating disk, and a tail tube is fixedly connected inside the circular hole. A fixed tube is fixedly connected to the upper end of the tail tube, and an infusion assembly is provided at the other end of the fixed tube. The infusion assembly includes an offset seat and a boss. The boss is fixedly connected to the rotating disk. A groove is opened on the upper side of the boss. The offset seat is movably connected to the inner wall of the groove of the boss. A circular hole is opened on the offset seat, and a movable tube is fixedly connected inside the circular hole. One end of the movable tube near the central platform is movably connected to the inside of the fixed tube. An insertion tube is fixedly connected to the other end of the movable tube. A push rod is provided above the insertion tube. The push rod is fixedly connected to the offset seat. Two symmetrical hydraulic cylinders are fixedly connected to the rotating disk. Side plates are fixedly connected to both sides of the offset seat. The other ends of the two hydraulic cylinders are fixedly connected to the two side plates of the offset seat.

[0011] By incorporating an infusion assembly, which utilizes a movable offset seat, the assembly can provide thrust for the movement of the attachment plate while simultaneously connecting the insertion tube and the connecting tube. This ensures that the seawater entering through the tail tube smoothly enters the sample storage tube. The infusion assembly is entirely movable and can be retracted within a small range (the offset seat moves, and the movable tube and insertion tube move back), facilitating the rotation and adjustment of the rotary table and ensuring the successful sampling of multiple sample storage tubes.

[0012] In a preferred embodiment, an outer fixed platform is fixedly connected to the upper side of the rotary table, a main shaft is fixedly connected to the upper end of the outer fixed platform, a ring gear is fixedly connected to the outside of the main shaft, and a top platform is provided above the outer fixed platform. A rectangular mounting groove is opened inside the top platform, and a drive motor is fixedly connected inside the mounting groove. The output end of the drive motor is connected to a short shaft through a coupling, and a drive gear is fixedly connected to the other end of the short shaft. The drive gear and the ring gear mesh through tooth grooves. A shaft collar seat is movably connected to the outside of the outer fixed platform. Multiple circumferentially spaced connecting plates are fixedly connected to the upper end of the shaft collar seat. The other end of the connecting plates is fixedly connected to the lower side of the top platform. Multiple circumferentially spaced support plates are fixedly connected to the outside of the shaft collar seat. The other end of the support plates is fixedly connected to the inner wall of the bottom box. Two symmetrical top plates are fixedly connected to the outside of the shaft collar seat, and a mounting bracket is fixedly connected to the upper side of each of the two top plates.

[0013] The mounting bracket, consisting of a mounting frame, a collar seat, and a drive motor, is installed on the bottom of the drone. When the infusion assembly is adjusted, the drive motor drives the active gear to mesh with the ring gear, and the main shaft drives the outer fixed platform to rotate, thereby rotating the turntable. The collar seat provides support at the upper end of the outer fixed platform, ensuring the rotation of the outer fixed platform while further maintaining its stability.

[0014] In a preferred embodiment, a cylindrical base is fixedly connected to the lower side of the central platform. A telescopic cylinder is movably connected inside the cylindrical base, located outside the tail tube. A weight is fixedly connected to the outside of the lowest telescopic cylinder, and a sampling hose is installed inside the telescopic cylinder. The sampling hose has two connectors. The upper connector of the sampling hose is movably connected to the lower end of the tail tube, and the lower connector of the sampling hose is fixedly connected to a micro liquid pump. The micro liquid pump is fixedly connected to the inner wall of the lowest telescopic cylinder. A lowering assembly is provided outside the cylindrical base. The lowering assembly includes a take-up reel and a reversing mechanism. The motor, take-up reel, and drum base are fixedly connected externally. The reverse motor is fixedly connected to a motor frame, which is fixedly connected to the lower side of the internal base. The output end of the reverse gripping motor is connected to a rotating shaft via a coupling. A round hole is opened on the side of the take-up reel away from the drum base. The other end of the rotating shaft passes through the round hole of the take-up reel and is movably connected to the inner wall of one side of the take-up reel. A take-up sleeve is fixedly connected to the outside of the rotating shaft. The take-up sleeve is located inside the take-up reel. A rope is wound around the outside of the take-up sleeve. A notch is opened on the lower side of the take-up reel. The other end of the rope passes through the notch of the take-up reel and is fixedly connected to the weight block.

[0015] The device is equipped with a lowering assembly that uses a wound rope to control the extension and retraction of the telescopic cylinder, facilitating the lowering and retrieval of the micro-liquid pump for seawater sampling. The wound rope, in conjunction with the telescopic cylinder, enables the lowering and retrieval of the sampling tube, preventing the fixed length of the sampling tube from affecting the drone's flight and improving the drone's stability during operation. The sampling hose is located inside the telescopic cylinder, allowing for easy retraction based on the overall length of the cylinder during raising and lowering, improving storage efficiency. The weight block increases the weight at the lower end of the telescopic cylinder, facilitating its lowering, and the increased weight also improves the overall stability of the device during sampling.

[0016] As can be seen from the above, the UAV seawater sampling device with multi-point separation function provided by the present invention can sample seawater from different areas and store it separately, realizing multi-point sampling in different areas without repeated back-and-forth operations. Multiple sample storage tubes are installed in a ring and outward expansion manner, which can maintain the center of gravity of the bottom box unchanged after sampling (the overall weight of the bottom box increases), ensuring the stability of the UAV flight operation, avoiding the seawater samples from being concentrated in a single position, causing the center of gravity of the UAV to shift, thereby affecting its flight performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a UAV seawater sampling device with multi-point separation function proposed in this invention.

[0018] Figure 2 This is a schematic diagram of the built-in base structure of a UAV seawater sampling device with multi-point separation function proposed in this invention;

[0019] Figure 3 This is a schematic cross-sectional view of the bottom box of a UAV seawater sampling device with multi-point separation function proposed in this invention.

[0020] Figure 4 This is a schematic diagram of the leak-proof component structure of a UAV seawater sampling device with multi-point separation function proposed in this invention;

[0021] Figure 5 This is a schematic diagram of the infusion component structure of a UAV seawater sampling device with multi-point separation function proposed in this invention;

[0022] Figure 6 This is a schematic diagram of the internal structure of the bottom box of a UAV seawater sampling device with multi-point separation function proposed in this invention;

[0023] Figure 7 This is a schematic diagram of the telescopic cylinder structure of a UAV seawater sampling device with multi-point separation function proposed in this invention.

[0024] Figure 8 This is a schematic diagram of the lowering component structure of a UAV seawater sampling device with multi-point separation function proposed in this invention.

[0025] In the diagram: 1. Base box; 2. Internal seat; 3. Sample storage tube; 4. Inlet; 5. Drain; 6. Cap; 7. Flip cap; 8. Central platform; 9. Support frame; 10. Leak-proof assembly; 1001. Connecting tube; 1002. Side seat; 1003. Drain tube; 1004. Movable plug; 1005. Push rod; 1006. Attachment piece; 1007. Protrusion; 1008. Return spring; 11. Rotary disc; 12. Fixed tube; 13. Infusion assembly; 1301. Offset seat; 1302. Boss; 1303. Movable tube; 1304. Insertion tube; 130 5. Top rod; 1306. Side plate; 1307. Hydraulic cylinder; 14. Tail tube; 15. External mounting platform; 16. Main shaft; 17. Ring gear; 18. Top platform; 19. Drive motor; 20. Drive gear; 21. Shaft collar seat; 22. Support plate; 23. Top plate; 24. Mounting bracket; 25. Cylinder seat; 26. Telescopic cylinder; 27. Sampling hose; 28. Miniature liquid pump; 29. ​​Weight block; 30. Lowering assembly; 3001. Take-up reel; 3002. Reversing motor; 3003. Motor frame; 3004. Rotating shaft; 3005. Rewind sleeve; 3006. Rope. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] The UAV seawater sampling device with multi-point separation function disclosed in this invention is mainly used in scenarios where the sampling process is cumbersome and the overall sampling efficiency is low.

[0028] Reference Figure 1-5 A UAV seawater sampling device with multi-point separation function includes a base box 1. An internal base 2 is bolted to the inside of the base box 1. The internal base 2 has four equidistant annular mounting grooves. The internal of the four annular mounting grooves is bolted to a sample storage tube 3. Each sample storage tube 3 is provided with an inlet 4 and a outlet 5. The inlet 4 is located above the sample storage tube 3. The inlets 4 on the four sample storage tubes 3 are located in different positions. The outlets 5 on the four sample storage tubes 3 are horizontally placed. The external of each of the four outlets 5 is rotatably connected to a cap 6 by an external wall thread. The bottom of the internal base 2 has a rectangular groove located at the position of the four outlets 5. The internal of the rectangular groove is rotatably connected to a flip cover 7 by a bearing. A central platform 8 is provided in the middle of the internal base 2. The external of the central platform 8 is bolted to four circumferentially equidistant support frames 9. The other end of each of the four support frames 9 is bolted to the internal base 2.

[0029] Specifically, the bottom box 1 is installed under the drone during use. When sampling in the first area, the seawater sample is drawn in and enters the innermost sample storage tube 3 through the liquid inlet 4. After sampling is completed, the drone moves to the second area, where the seawater sample is collected and stored in the second sample storage tube 3. Sampling operations are performed in multiple areas in succession. After sampling is completed, the drone returns, and the operator opens the flip cover 7 and unscrews the sealing cap 6 to collect the seawater sample.

[0030] In specific application scenarios, the multiple sample storage tubes 3 inside the bottom box 1 can separate and store seawater samples from different areas, enabling multi-point sampling in different areas without repeated back-and-forth operations. The multiple sample storage tubes 3 are installed in a ring-shaped and outward-expanding manner, which can maintain the center of gravity of the bottom box 1 after sampling (the overall weight of the bottom box 1 increases), ensuring the stability of the UAV flight operation and preventing the seawater samples from being concentrated in a single location, causing the center of gravity of the UAV to shift and thus affecting its flight performance. The flip cover 7 and the sealing cover 6 facilitate the centralized collection of seawater samples after sampling, improving the ease of use of the device.

[0031] Reference Figure 1 , Figure 3 and Figure 4Four leak-proof components 10 are provided above the sample storage tube 3, and the four leak-proof components 10 are distributed equidistantly in a circle. Each leak-proof component 10 includes a connecting pipe 1001 and a side seat 1002. The connecting pipe 1001 is a hollow circular tube, and a liquid outlet is opened at the bottom of the connecting pipe 1001. A lower liquid pipe 1003 is bolted to the inside of the liquid outlet. The lower end of the lower liquid pipe 1003 is bolted to the liquid inlet 4 of the sample storage tube 3 below. A movable plug 1004 is slidably connected inside the connecting pipe 1001. A push rod 1005 is bolted to the side of 1004 away from the central platform 8. The other end of the push rod 1005 passes through one side of the connecting pipe 1001 and is bolted to an attachment plate 1006. A protrusion 1007 is provided on the attachment plate 1006. The side attachment 1002 is bolted to the inner wall of the bottom box 1. A return spring 1008 is bolted to the side of the side attachment 1002 near the connecting pipe 1001. The other end of the return spring 1008 is bolted to the protrusion 1007.

[0032] Specifically, before sampling, the protrusion 1007, under force, causes the attachment 1006 to move away from the connecting pipe 1001, and the push rod 1005 causes the movable plug 1004 to move towards the inner wall of the bottom box 1. The return spring 1008 is compressed, and the liquid outlet of the connecting pipe 1001 below the movable plug 1004 is exposed. During sampling, seawater enters the connecting pipe 1001 and flows downward from the liquid outlet of the connecting pipe 1001, entering the inlet 4 through the lower liquid pipe 1003. After sampling is completed, the thrust on the protrusion 1007 slowly disappears, the return spring 1008 evaporates and deforms, causing the attachment 1006 to move closer to the connecting pipe 1001, and the movable plug 1004 moves forward to close the liquid outlet of the connecting pipe 1001.

[0033] In specific application scenarios, the leak-proof component 10 is suitable for the sealing process after sampling in the sample storage tube 3. That is, the leak-proof component 10 can seal the liquid outlet of the connecting tube 1001 after sampling, preventing the sample storage tube 3 from shaking due to the flight operation of the drone after sampling, causing the seawater inside the sample storage tube 3 to flow out, thereby causing the inside of the device to become wet and affecting the normal operation of the internal components. The elastic property of the reset spring 1008 is used to provide the reverse driving force for the reset of the movable plug 1004, which can ensure the feasibility of the sampling operation while achieving the sealing operation.

[0034] Reference Figure 3 , Figure 4 and Figure 5A rotating disk 11 is rotatably connected to the upper side of the central platform 8 via a bearing. A circular hole is formed in the center of the rotating disk 11, and a tail tube 14 is bolted into the hole. A fixing tube 12 is bolted to the upper end of the tail tube 14, and an infusion assembly 13 is provided at the other end of the fixing tube 12. The infusion assembly 13 includes an offset seat 1301 and a boss 1302. The boss 1302 is bolted to the rotating disk 11. A groove is formed on the upper side of the boss 1302, and the offset seat 1301 is slidably connected to the inner wall of the groove of the boss 1302. A circular hole is formed on the offset seat 1301, and the inside of the circular hole is bolted to... A movable tube 1303 is connected, with one end of the movable tube 1303 near the central platform 8 slidingly connected to the inside of the fixed tube 12. The other end of the movable tube 1303 is connected to an insertion tube 1304 by bolts. A push rod 1305 is provided above the insertion tube 1304. The push rod 1305 is connected to the offset seat 1301 by bolts. Two symmetrical hydraulic cylinders 1307 are connected to the rotary table 11 by bolts. Side plates 1306 are connected to both sides of the offset seat 1301 by bolts. The other ends of the two hydraulic cylinders 1307 are connected to the two side plates 1306 of the offset seat 1301 by bolts.

[0035] Specifically, before sampling, the rotating disc 11 is adjusted to rotate so that the insertion tube 1304 moves to the front end of the connecting tube 1001 corresponding to the sample tube to be stored 3. Then, the hydraulic cylinder 1307 is activated to extend and drive the offset seat 1301 to move away from the rotating disc 11. The push rod 1005 contacts the protrusion 1007 first and applies a pushing force. As the offset seat 1301 continues to move, the insertion tube 1304 is inserted into the connecting tube 1001 (during the process, the movable tube 1303 moves in the fixed tube 12).

[0036] In specific application scenarios, the infusion assembly 13 is suitable for the pipeline connection link before sampling. That is, the infusion assembly 13 uses the movable offset seat 1301 to realize the connection between the insertion tube 1304 and the connecting tube 1001 while providing the moving thrust of the attachment plate 1006, thereby ensuring that the seawater entering the tail tube 14 can smoothly enter the sample storage tube 3. The infusion assembly 13 is movable as a whole and can be stored in a small range (the offset seat 1301 moves, and the movable tube 1303 and insertion tube 1304 move back), which facilitates the rotation and adjustment of the rotating plate 11 and ensures that multiple sample storage tubes 3 can be sampled.

[0037] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6An outer mounting platform 15 is bolted to the upper side of the rotating disk 11. A main shaft 16 is bolted to the upper end of the outer mounting platform 15. A ring gear 17 is bolted to the outside of the main shaft 16. A top platform 18 is provided above the outer mounting platform 15. A rectangular mounting groove is provided inside the top platform 18. A drive motor 19 is bolted to the inside of the mounting groove. The output end of the drive motor 19 is connected to a short shaft via a coupling. The other end of the short shaft is bolted to a drive gear 20. The drive gear 20 and the ring gear 17 mesh with each other through tooth grooves. The outer fixed platform 15 is rotatably connected to a collar seat 21 via bearings. The upper end of the collar seat 21 is connected to multiple circumferentially spaced connecting plates via bolts. The other end of the connecting plates is connected to the lower side of the top platform 18 via bolts. The outer side of the collar seat 21 is connected to multiple circumferentially spaced support plates 22 via bolts. The other end of the support plates 22 is connected to the inner wall of the bottom box 1 via bolts. The outer side of the collar seat 21 is connected to two symmetrical top plates 23 via bolts. The upper side of each of the two top plates 23 is connected to a mounting bracket 24 via bolts.

[0038] Specifically, the mounting bracket 24 is installed on the bottom of the drone; when the infusion assembly 13 is adjusted: the drive motor 19 drives the active gear 20 to mesh with the ring gear 17, the main shaft 16 drives the outer fixed platform 15 to rotate, thereby rotating the turntable 11; the shaft ring seat 21 supports the upper end of the outer fixed platform 15, ensuring the rotation of the outer fixed platform 15 while further maintaining the stability of the outer fixed platform 15.

[0039] Reference Figure 3 , Figure 7 and Figure 8A cylinder base 25 is bolted to the lower side of the central platform 8. A telescopic cylinder 26 is slidably connected inside the cylinder base 25, located outside the tail tube 14. A weight block 29 is bolted to the outside of the lowest telescopic cylinder 26. A sampling hose 27 is installed inside the telescopic cylinder 26. The sampling hose 27 has two connectors. The upper connector of the sampling hose 27 is rotatably connected to the lower end of the tail tube 14 via a bearing. The lower connector of the sampling hose 27 is bolted to a micro liquid pump 28. The micro liquid pump 28 is bolted to the inner wall of the lowest telescopic tube. A lowering assembly 30 is installed outside the cylinder base 25. The lowering assembly 30 includes a take-up reel 3001 and a reversing motor 3002. The take-up reel 3001 is bolted to the outside of the cylinder base 25. The motor frame 3003 is bolted to the outside of the machine 3002. The motor frame 3003 is bolted to the lower side of the built-in base 2. The output end of the reverse grip motor is connected to the rotating shaft 3004 via a coupling. A round hole is provided on the side of the take-up reel 3001 away from the drum base 25. The other end of the rotating shaft 3004 passes through the round hole of the take-up reel 3001 and is rotatably connected to the inner wall of one side of the take-up reel 3001 via a bearing. The take-up sleeve 3005 is bolted to the outside of the rotating shaft 3004. The take-up sleeve 3005 is located inside the take-up reel 3001. A rope 3006 is wound around the outside of the take-up sleeve 3005. A notch is provided on the lower side of the take-up reel 3001. The other end of the rope 3006 passes through the notch of the take-up reel 3001 and is bolted to the weight block 29.

[0040] Specifically, after reaching the sampling area, the drone floats on the water surface. The reverse motor 3002 drives the rotating shaft 3004 to rotate, and the cable 3006 outside the take-up sleeve 3005 is loosened. Under the gravity of the weighted seat, the telescopic cylinder 26 moves down from the cylinder base 25 until the micro liquid pump 28 in the lowest telescopic cylinder 26 reaches the sampling depth. Then, the micro liquid pump 28 works to draw in seawater and deliver it upward under negative pressure. The seawater enters the tailpipe 14 from the sampling hose 27. After the sampling operation is completed, the reverse motor 3002 drives the rotating shaft 3004 to rotate in the opposite direction. The cable 3006 is wound in the take-up reel 3001, and the telescopic cylinder 26 retracts to the cylinder base 25.

[0041] In specific application scenarios, the lowering component 30 is suitable for lowering the pipeline into the water before sampling. That is, the lowering component 30 uses the wound rope 3006 to control the extension and retraction state of the telescopic cylinder 26, thereby facilitating the lowering and retrieval of the micro liquid pump 28 to achieve seawater sampling. The wound rope 3006, together with the telescopic cylinder 26, can realize the lowering and retrieval of the sampling tube, avoiding the fixed length of the sampling tube from affecting the flight of the UAV and improving the stability of the UAV during operation. The sampling hose 27 is located inside the telescopic cylinder 26, and can be stored according to the overall length of the telescopic cylinder 26 when the telescopic cylinder 26 is raised and lowered, improving the storage effect. The weight block 29 can increase the weight of the lower end of the telescopic cylinder 26, making it easier to lower the telescopic cylinder 26. At the same time, the increased weight can improve the overall stability of the device during sampling.

[0042] Working principle: When in use, the base box 1 is installed on the bottom of the drone via the mounting bracket 24. After reaching the sampling area, the drone floats on the water surface. The reverse motor 3002 drives the rotating shaft 3004 to rotate, and the cable 3006 outside the winding sleeve 3005 is loosened. Under the gravity of the weighted seat, the telescopic cylinder 26 moves down from the cylinder base 25 until the micro liquid pump 28 in the lowest telescopic cylinder 26 reaches the sampling depth. Then the micro liquid pump 28 works to draw in seawater and deliver it upward under negative pressure. The seawater enters the tail tube 14 from the sampling hose 27.

[0043] Before sampling, the rotating disc 11 is adjusted to rotate (the drive motor 19 drives the active gear 20 to mesh with the ring gear 17, and the main shaft 16 drives the outer fixed platform 15 to rotate, thus rotating the disc 11) so that the insertion tube 1304 moves to the front end of the connecting tube 1001 corresponding to the sample tube 3 to be stored. Then, the hydraulic cylinder 1307 is started to extend and drive the offset seat 1301 to move away from the rotating disc 11. The push rod 1005 contacts the protrusion 1007 first and applies a pushing force. As the offset seat 1301 continues to move, the insertion tube 1304 is inserted into the connecting tube 1001 (during the process, the movable tube 1303 moves in the fixed tube 12). After the protrusion 1007 is subjected to force, it drives the attachment 1006 to move away from the connecting tube 1001. The push rod 1005 drives the movable plug 1004 to move towards the inner wall of the bottom box 1. The reset spring 1008 is compressed, and the liquid port of the connecting tube 1001 below the movable plug 1004 is exposed.

[0044] During sampling, seawater enters the connecting pipe 1001 and flows downward from the liquid outlet of the connecting pipe 1001, entering the liquid inlet 4 through the liquid outlet 1003; after sampling is completed, the thrust on the convex plate 1007 slowly disappears, the return spring 1008 evaporates its elastic deformation and drives the attached plate 1006 to move closer to the connecting pipe 1001, and the movable plug 1004 moves forward to close the liquid outlet of the connecting pipe 1001.

[0045] When sampling in the first area, the seawater sample is drawn in and enters the innermost sample storage tube 3 through the inlet 4. After sampling is completed, the drone moves to the second area, where the seawater sample is collected and stored in the second sample storage tube 3. Sampling operations are performed in multiple areas in succession. After sampling is completed, the drone returns, and the operator opens the flip cover 7 and unscrews the seal 6 to collect the seawater sample.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A UAV seawater sampling device with multi-point separation function, comprising a bottom box (1), characterized in that, The bottom box (1) is fixedly connected to an internal base (2), and the internal base (2) is provided with four equidistant annular mounting grooves. The four annular mounting grooves are respectively fixedly connected to sample tubes (3). Each sample tube (3) is provided with an inlet (4) and a drain (5). The inlet (4) is located above the sample tube (3). The inlets (4) on the four sample tubes (3) are located in different positions, and the drains (5) on the four sample tubes (3) are placed horizontally. The four drains (5) are all connected to a cap (6) by a threaded connection on the outer wall. The bottom of the internal base (2) is provided with a rectangular opening. The rectangular trough is located at the four drain ports (5). The interior of the rectangular trough is movably connected to a flip cover (7). A central platform (8) is provided in the middle of the built-in seat (2), and four circumferentially equidistant support frames (9) are fixedly connected to the outside of the central platform (8). The other ends of the four support frames (9) are fixedly connected to the built-in seat (2). Four leak-proof components (10) are provided above the sample storage tube (3), and the four leak-proof components (10) are circumferentially equidistant. The leak-proof component (10) includes a connecting pipe (1001) and a side seat (1002). The connecting pipe (1001) is a hollow round pipe. A liquid outlet is provided at the bottom of the tube (1001), and a lower liquid pipe (1003) is fixedly connected inside the liquid outlet. The lower end of the lower liquid pipe (1003) is fixedly connected to the inlet (4) of the lower sample storage tube (3). A movable plug (1004) is movably connected inside the connecting tube (1001). A push rod (1005) is fixedly connected to the side of the movable plug (1004) away from the central platform (8). The other end of the push rod (1005) passes through one side of the connecting tube (1001) and is fixedly connected to an attachment plate (1006). A protrusion (1007) is provided on the attachment plate (1006), and a side attachment seat (1007) is provided. 2) The inner wall of the base box (1) is fixedly connected, and a return spring (1008) is fixedly connected on the side of the side seat (1002) near the connecting tube (1001). The other end of the return spring (1008) is fixedly connected to the protrusion (1007). The upper side of the central platform (8) is movably connected to the rotating disk (11). A round hole is opened in the middle of the rotating disk (11). The tail tube (14) is fixedly connected inside the round hole. The upper end of the tail tube (14) is fixedly connected to the fixing tube (12), and the other end of the fixing tube (12) is provided with an infusion assembly (13). The sample storage tube (3) is installed in a ring and outward expansion manner.

2. The unmanned aerial vehicle seawater sampling device with multi-point separation function according to claim 1, characterized in that, The infusion assembly (13) includes an offset seat (1301) and a boss (1302). The boss (1302) is fixedly connected to the rotating disk (11). A groove is provided on the upper side of the boss (1302). The offset seat (1301) is movably connected to the inner wall of the groove of the boss (1302). A circular hole is provided on the offset seat (1301). A movable tube (1303) is fixedly connected inside the circular hole. One end of the movable tube (1303) near the central platform (8) is movably connected to the inside of the fixed tube (12). The other end of the moving tube (1303) is fixedly connected to the insertion tube (1304). A push rod (1305) is provided above the insertion tube (1304). The push rod (1305) is fixedly connected to the offset seat (1301). Two symmetrical hydraulic cylinders (1307) are fixedly connected on the rotating disk (11). Side plates (1306) are fixedly connected to both sides of the offset seat (1301). The other ends of the two hydraulic cylinders (1307) are fixedly connected to the two side plates (1306) of the offset seat (1301).

3. The unmanned aerial vehicle seawater sampling device with multi-point separation function according to claim 2, characterized in that, The upper side of the rotating disk (11) is fixedly connected to an outer fixed platform (15), the upper end of the outer fixed platform (15) is fixedly connected to a main shaft (16), the outside of the main shaft (16) is fixedly connected to a ring gear (17), and a top platform (18) is provided above the outer fixed platform (15). A rectangular mounting groove is provided inside the top platform (18), and a drive motor (19) is fixedly connected inside the mounting groove. The output end of the drive motor (19) is connected to a short shaft through a coupling, and the other end of the short shaft is fixedly connected to a drive gear (20). The drive gear (20) and the ring gear (17) mesh through tooth grooves.

4. The unmanned aerial vehicle seawater sampling device with multi-point separation function according to claim 3, characterized in that, The outer fixed platform (15) is externally connected to a collar seat (21). The upper end of the collar seat (21) is fixedly connected to multiple circumferentially spaced connecting plates. The other end of the connecting plates is fixedly connected to the lower side of the top platform (18). The collar seat (21) is externally fixedly connected to multiple circumferentially spaced support plates (22). The other end of the support plates (22) is fixedly connected to the inner wall of the bottom box (1). The collar seat (21) is externally fixedly connected to two symmetrical top plates (23). The upper side of each of the two top plates (23) is fixedly connected to a mounting bracket (24).

5. The unmanned aerial vehicle seawater sampling device with multi-point separation function according to claim 4, characterized in that, A cylinder seat (25) is fixedly connected to the lower side of the central platform (8). The cylinder seat (25) is located outside the tail tube (14). A telescopic cylinder (26) is movably connected inside the cylinder seat (25). A weight block (29) is fixedly connected to the outside of the telescopic cylinder (26) at the lowest end. A sampling hose (27) is provided inside the telescopic cylinder (26). Two connectors are provided on the sampling hose (27). The upper connector of the sampling hose (27) is movably connected to the lower end of the tail tube (14). A micro liquid pump (28) is fixedly connected to the lower connector of the sampling hose (27). The micro liquid pump (28) is fixedly connected to the inner wall of the telescopic tube at the lowest end.

6. The unmanned aerial vehicle seawater sampling device with multi-point separation function according to claim 5, characterized in that, The cylinder base (25) is provided with a lowering assembly (30) on its exterior.

7. A UAV seawater sampling device with multi-point separation function according to claim 6, characterized in that, The lowering assembly (30) includes a take-up reel (3001) and a reversing motor (3002). The take-up reel (3001) is fixedly connected to the outside of the drum base (25). The reversing motor (3002) is fixedly connected to a motor frame (3003). The motor frame (3003) is fixedly connected to the lower side of the inner base (2). The output end of the reversing motor (3002) is connected to a rotating shaft (3004) via a coupling. A round hole is provided on the side of the take-up reel (3001) away from the drum base (25). The rotating shaft (3004) The other end of the shaft (3004) passes through the round hole of the take-up reel (3001) and is movably connected to the inner wall of one side of the take-up reel (3001). The shaft (3004) is fixedly connected to the outside of the take-up sleeve (3005). The take-up sleeve (3005) is located inside the take-up reel (3001). The take-up sleeve (3005) is wrapped with a rope (3006). A notch is opened on the lower side of the take-up reel (3001). The other end of the rope (3006) passes through the notch of the take-up reel (3001) and is fixedly connected to the weight block (29).

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