Portable floating algae collecting device

Abstract

The invention discloses a portable floating algae collection device, and belongs to the technical field of plankton collection, the collection device comprises an unmanned ship, a transversely arranged collection net below the unmanned ship, an open collection port at the front end of the collection net, the rear end of the collection net is collected and connected with a valve, the outer side of the front end of the collection net is connected with an outer sleeve member, and the outer sleeve member is connected with the unmanned ship. The outer sleeve part is connected with the unmanned ship, an overflowing gap is formed between the inner wall of the outer sleeve part and the periphery of the collecting net, the two ends of the overflowing gap are communicated with the outside, a rotating part is arranged in the overflowing gap and comprises a rotating ring, the rotating ring is rotationally connected with the inner side of the outer sleeve part, blades are arranged on the rotating ring in a surrounding mode, the blades have bending degrees, and the tail ends of the blades can make contact with the periphery of the collecting net. A clamping ring for limiting the position of the rotating ring is arranged on the inner wall of the outer sleeve piece. The attitude of the collection net can be stabilized, and the collection stability and the collection efficiency are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of plankton collection, and particularly relates to a portable planktonic algae collection device. Background Art

[0002] Plankton generally refers to drifting organisms that live in water and lack effective mobility, including phytoplankton and zooplankton. Some plankton have the ability to swim, but their swimming speed is often slower than the flow rate of the ocean current they are in, so they cannot effectively swim flexibly in the water. Among the organisms in waters such as the ocean, lakes, and rivers, plankton have no mobility at all or very weak mobility, so they cannot move against the water flow but float on the water surface. Such organisms are collectively called plankton. Plankton sampling is one of the important contents of ocean surveys. Since different plankton have very different characteristics of vertical movement, stratified sampling of plankton is of great significance for understanding the ecological function zoning and distribution of plankton.

[0003] In order to study phytoplankton and zooplankton, it is necessary to collect plankton. There are mainly two existing collection methods: one is to set a pump body in a box and use the pump body to suck plankton into the box to complete the collection. This type of device is heavy and not easy to deploy, consumes a large cost, and cannot achieve collection far from the shore; the other is to use a net carried by a rod to move regularly in the water for interception and collection. This collection method has low efficiency, and the plankton after collection is not easy to fall off the net body.

[0004] Korean Patent No. KR102696628B1 discloses an underwater collection system for collecting zooplankton. The system includes an underwater vehicle for being lowered into the sea and towed behind a surface ship, and also includes a housing provided with an inlet through which fluid containing zooplankton can flow; a hose installed on the underwater vehicle and in fluid communication with the inlet, the hose being adapted to fix and fluidly connect the underwater vehicle to the surface ship; and a pumping device for sucking fluid containing zooplankton through the inlet in the underwater vehicle and for pumping the fluid containing zooplankton through the hose to the surface ship. However, in similar prior arts, the net body is prone to collapse during the towing process, affecting the collection volume, and the underwater equipment is subject to large water resistance. The connecting rod or other components with the hull have insufficient rigidity and are easy to bend and break, resulting in high maintenance costs. Summary of the Invention

[0005] The purpose of the present invention is to provide a portable planktonic algae collection device that can stably maintain the collection posture and is energy-efficient and high-efficiency.

[0006] The technical solution adopted by the present invention to achieve the above purpose is as follows: Portable planktonic algae collection device, comprising: an unmanned boat, with a horizontally arranged collection net below the unmanned boat. The front end of the collection net has an open collection port, the rear end of the collection net is constricted and connected with a valve, and the outer side of the front end of the collection net is connected with an outer sleeve, and the outer sleeve is connected with the unmanned boat. When in use, the unmanned boat is arranged on the water surface of the water area to be sampled. At this time, the collection net and the outer sleeve are located below the water surface. When the unmanned boat moves, it drags the outer sleeve and the collection net to move in the water. The planktonic algae in the water continuously enter the collection net through the collection port and are collected. At the same time, the water body can pass through the mesh of the collection net. Since the collection net is horizontally arranged, that is, during the movement of the unmanned boat, the water body passes through the collection net horizontally, which is beneficial to improving the probability of planktonic algae being collected through the collection port and increasing the collection amount. Using the unmanned boat to carry the collection net for collection facilitates the device to collect in the nearshore and offshore waters, improving the sampling range; The outer sleeve is arranged on the outer side of the front end of the collection net to form an outer protection for the collection net, reducing the possibility that the collection port deforms and shrinks and cannot collect effectively.

[0007] Preferably, an overflow gap is formed between the inner wall of the outer sleeve and the outer periphery of the collection net. The overflow gap is communicated with the outside at both ends. A rotating member is arranged in the overflow gap. The rotating member includes a rotating ring, and the rotating ring is rotatably connected inside the outer sleeve. The rotating ring is surrounded by blades. The blades have a curvature and the ends can contact the outer periphery of the collection net. A snap ring for limiting the position of the rotating ring is arranged on the inner wall of the outer sleeve. When the unmanned boat moves forward and drags the outer sleeve and the collection net to move horizontally underwater, part of the water body carries planktonic algae and enters the inside of the collection net through the collection port for collection, and another part of the water body can enter the overflow gap along the inner wall of the outer sleeve and act on the blades. Under the action of the water flow, the multiple blades carry the conversion and rotate relative to the outer sleeve. The rotating blades can evenly contact the outer periphery of the collection net, realizing the shaping of the outer periphery of the collection net, reducing the possibility of the collection net collapsing, and enabling the collection net to collect and accommodate planktonic algae in a stable extended posture, thereby increasing the capture amount and capture efficiency of planktonic algae; Since the swirling flow flows from the collection port side to the valve body side in the overflow gap, that is, the swirling flow formed by the rotating ring can act backward on the collection net, which is beneficial to enabling the collection net to fully extend in its extending direction, further stabilizing the posture of the flexible collection net during the collection process, increasing its collection and accommodation capacity for planktonic algae. At the same time, the fully extended collection net can also reduce the contact area between the collection net and the water body, thereby reducing the water resistance received by the collection net, and thus improving the collection efficiency of planktonic algae; When the swirling flow moves towards the valve body, it can contact the meshes at the rear of the collection net, promoting the aquatic plants or animals wound around the outer periphery of the rear of the collection net. On the one hand, it ensures that the water body can smoothly pass through the meshes at the rear of the collection net, reducing the formation of turbulent flow of the water body in the collection net due to mesh blockage, which causes the planktonic algae to escape from the collection net, and is beneficial to stabilizing the collection volume. On the other hand, it reduces the probability of other organisms and animals attaching to the rear of the collection net, so as to avoid the overloading of the load under the unmanned boat, resulting in the sinking of the unmanned boat, improving the use safety of the unmanned boat and reducing the use cost.

[0008] Preferably, the blade is a flexible sheet body. The flexible blade can cause no damage and excessive interference to the net body of the collection net during the rotation process, reducing the possibility of the net body rupture resulting in the escape of planktonic algae.

[0009] Preferably, the unmanned boat includes a left hull and a right hull that are arranged in the same direction and parallel to each other. A hoisting rod is connected between the left hull and the right hull, and the collection net is arranged between the left hull and the right hull. The collection net is arranged between the left hull and the right hull. During the process of the hull advancing, the water body can pass through the space between the left hull and the right hull at a relatively fast speed. The fast flowing water can more quickly guide the planktonic algae into the collection net for collection when passing through the collection net, improving the collection efficiency. The hoisting rod can be connected with a hook and a suspension rope, so as to facilitate the throwing of the sampling device on the water surface and the recovery after the sampling is completed.

[0010] Preferably, suspension rings are evenly distributed on the inner side of one end of the outer sleeve close to the collection port, and rope bodies respectively connected with the suspension rings are arranged on the outside of the collection port. The collection net realizes the flexible connection of its front end inside the outer sleeve through the rope bodies and the suspension rings. When the unmanned boat is in a stationary state, the tail end of the collection net droops due to its own weight. When the unmanned boat is advancing, the water body acts on the rotating part to form a swirling flow. At this time, a uniformly spaced flow-through gap is formed between the outer sleeve and the front part of the collection net to realize the shaping and cleaning ability of the collection net. In the above scheme, the outer sleeve is only arranged at the front end of the collection net and the two are connected by rope bodies, so that the initial load at the bottom of the unmanned boat is relatively low, which is beneficial to increasing the maximum load of the unmanned boat during the collection process, thereby improving the collection volume of planktonic algae on the premise of ensuring the stability of the unmanned boat.

[0011] Preferably, an inner kit is further provided in the overcurrent gap. The inner kit includes a first sleeve body which is arranged on the side of the rotating part close to the valve. An outer layer gap is formed between the first sleeve body and the inner wall of the outer sleeve, and an inner layer gap is formed between the first sleeve body and the outer periphery of the collection net. The first sleeve body has a diversion part at one end close to the rotating part, and the diversion part inclines towards the center of the rear end of the collection net. After the rotating part forms a swirl flow, it is divided into two layers of swirl flows by the inner kit. One layer of swirl flow enters the inner layer interval and, under the guidance of the diversion part, flows along the outer periphery of the collection net towards the center of its rear end, so that the planktonic algae clinging to the net body inside the collection net can be relatively concentrated at the rear of the middle part of the collection net, realizing centralized collection, facilitating the extraction of planktonic algae after the device is recovered ashore, avoiding blockage inside the mesh holes at the same time, ensuring the flow rate and velocity of water passing through the collection net, reducing the water resistance received by the collection net, thereby reducing the water interference received by the unmanned ship underwater and improving the navigation stability of the unmanned ship during the collection process; The other layer of swirl flow enters the outer layer interval and flows backward along the inner wall of the outer sleeve, forming the propulsion power of the unmanned ship underwater, improving the traveling speed of the unmanned ship, helping to reduce the energy consumption of the unmanned ship while improving the sampling efficiency of planktonic algae, prolonging the endurance time, enabling the sampling device to be deployed near the shore and move to waters farther from the shore for collection, and expanding the sampling selection range.

[0012] Preferably, fins are evenly distributed on the outer wall of the outer sleeve. The fins of the outer sleeve are used to separate the water flow, reduce the water resistance, and improve the stability.

[0013] Preferably, two mounting rods are symmetrically arranged above the outer sleeve, and the two mounting rods are respectively connected to the left hull and the right hull. The mounting rods extend downward and are inclined towards the unmanned ship, so that the collection net and the outer sleeve enter the water to a certain depth, facilitating the sampling of planktonic algae.

[0014] Preferably, the left hull and the right hull are respectively provided with propellers at the tail, and each propeller can be independently remotely controlled in terms of rotational speed and steering. By remotely and independently controlling each propeller, the unmanned ship can move forward, backward, accelerate, decelerate, and turn as a whole.

[0015] Preferably, an inertial navigation system and a main controller are installed on the unmanned ship. The main controller is used to read the signals of the inertial navigation system and control each propeller. By reading the signals of the inertial navigation system, the main controller judges the current azimuth and speed of the unmanned ship, and then controls the rotational speeds of the two propellers to make the hull run along a predetermined trajectory, so as to accurately sample in a preset area.

[0016] Due to the adoption of an underwater-towed collection net and the cooperation of an outer sleeve and a rotating member outside it, the present invention has the following beneficial effects: Water can promote the rotation of the rotating member through the flow gap, stabilizing the extended posture of the collection net in the collection state; the swirling flow formed by the rotating member is conducive to elongating the collection net, stabilizing the posture of the collection net during the collection process, and increasing the collection capacity; the flow of the swirling flow reduces the possibility of mesh blockage and the possibility of phytoplankton escaping due to the formation of turbulent flow; the swirling flow flows around the outer periphery of the collection net, reducing the probability of biological and animal attachment, avoiding the sinking of the unmanned boat due to overloading, and improving safety; the inner sleeve separates the swirling flow, and the inner swirling flow enables phytoplankton to concentrate behind the middle of the collection net, facilitating the extraction of phytoplankton after the device is recovered, and the outer swirling flow reduces underwater interference and improves the navigation stability of the unmanned boat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic side layout view of the present invention; Figure 2 is a schematic front layout view of the present invention; Figure 3 is a schematic cross-sectional view of the collection net, the outer sleeve, the inner sleeve and the rotating member; Figure 4 is Figure 3 an enlarged schematic view of area A in Figure 5 is a schematic view of the structure of the rotating member; Figure 6 is a schematic view of the structure of the inner sleeve.

[0018] Reference numerals in the drawings: unmanned boat 1; left hull 11; right hull 12; lifting rod 13; propeller 14; collection net 2; collection port 20; valve 21; outer sleeve 3; snap ring 31; front part 301; rear part 302; diffusion part 32; mounting rod 4; rotating member 5; swivel ring 51; blade 52; lifting ring 6; rope body 7; inner sleeve 8; first sleeve body 81; guide part 82; bracket 83; extension part 84; fin 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions of the present invention will be further described in detail below in conjunction with the specific embodiments and the drawings: Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] See the attached Figure 1 - attached Figure 3, A portable planktonic algae collection device, comprising: an unmanned boat 1, a collection net 2 is horizontally arranged below the unmanned boat 1, the front end of the collection net 2 has an open collection port 20, the rear end of the collection net 2 is constricted and connected with a valve 21, the outer side of the front end of the collection net 2 is connected with an outer sleeve 3, and the outer sleeve 3 is connected with the unmanned boat 1. When in use, the unmanned boat 1 is arranged on the water surface of the water area to be sampled. At this time, the collection net 2 and the outer sleeve 3 are located below the water surface. When the unmanned boat 1 moves, it drags the outer sleeve 3 and the collection net 2 to move in the water. The planktonic algae in the water continuously enter the collection net 2 through the collection port 20 and are collected. At the same time, the water body can pass through the mesh of the collection net 2. Since the collection net 2 is horizontally arranged, that is, when the unmanned boat 1 is moving forward, the water body passes through the collection net 2 horizontally, which is beneficial to improving the probability of planktonic algae being collected through the collection port 20 and increasing the collection amount. Using the unmanned boat 1 to carry the collection net 2 for collection is convenient for the device to collect in the near-shore and far-shore waters, improving the sampling range; The outer sleeve 3 is arranged on the outer side of the front end of the collection net 2 to form an outer protection for the collection net 2, reducing the possibility that the collection port 20 deforms and shrinks and cannot effectively collect.

[0021] See the appendix Figure 5 , An overflow gap is formed between the inner wall of the outer sleeve 3 and the outer periphery of the collection net 2. The overflow gap is communicated with the outside at both ends. A rotating member 5 is arranged in the overflow gap. The rotating member 5 includes a rotating ring 51. The rotating ring 51 is rotatably connected inside the outer sleeve 3. The rotating ring 51 is provided with blades 52 around it. The blades 52 have a curvature and the ends can contact the outer periphery of the collection net 2. A snap ring 31 for limiting the position of the rotating ring 51 is arranged on the inner wall of the outer sleeve 3.

[0022] See the appendix Figure 4 , It should be noted that the outer sleeve 3 includes a front part 301 and a rear part 302. The front part 301 and the rear part 302 are connected by being inserted tightly. There are two snap rings 31, which are respectively fixed on the inner sides of the front part 301 and the rear part 302 near the insertion part. The front part 301 and the rear part 302 are inserted tightly to install and limit the rotating ring 51 between the two snap rings 31.

[0023] When the unmanned boat 1 moves forward and drags the outer sleeve 3 and the collection net 2 to move horizontally underwater, part of the water body carries planktonic algae and enters the inside of the collection net 2 through the collection port 20 for collection. Another part of the water body can enter the overflow gap along the inner wall of the outer sleeve 3 and act on the blades 52. The multiple blades 52 rotate relative to the outer sleeve 3 under the action of the water flow. The rotating blades 52 can evenly contact the outer periphery of the collection net 2 to shape the outer periphery of the collection net 2, reducing the possibility of the collection net 2 collapsing, so that the collection net 2 can collect and accommodate planktonic algae in a stable expanded posture, thereby increasing the capture amount and capture efficiency of planktonic algae; Since the swirling flow moves from the side of the collection port 20 to the side of the valve 21 within the flow-through gap, that is, the swirling flow formed by the rotating ring can act backward on the collection net 2, which is conducive to enabling the collection net 2 to fully extend in its extending direction, further stabilizing the attitude of the flexible collection net 2 during the collection process, increasing its collection capacity for planktonic algae. At the same time, the fully extended collection net 2 can also reduce the contact area between the collection net 2 and the water body, thereby reducing the water resistance received by the collection net 2, and thus improving the collection efficiency of planktonic algae; When the swirling flow moves towards the valve 21, it can contact the meshes at the rear of the collection net 2, promoting aquatic plants or aquatic animals wound around the outer periphery of the rear of the collection net 2. On the one hand, it ensures that the water body can pass smoothly through the meshes at the rear of the collection net 2, reducing the formation of turbulent flow of the water body within the collection net 2 due to mesh blockage, which may cause planktonic algae to escape from the collection net 2, and is conducive to stabilizing the collection volume. On the other hand, it reduces the probability of other organisms and animals attaching to the rear of the collection net 2, so as to avoid the excessive load under the unmanned boat 1 causing the unmanned boat 1 to sink into the water, improving the safety of use of the unmanned boat 1 and reducing the use cost.

[0024] The blade 52 is a flexible sheet body. The flexible blade 52 can avoid damaging and overly interfering with the net body of the collection net 2 during the rotation process, reducing the possibility of the net body breaking and planktonic algae escaping.

[0025] The unmanned boat 1 includes a left hull 11 and a right hull 12 that are arranged in the same direction and parallel to each other. A lifting rod 13 is connected between the left hull 11 and the right hull 12, and the collection net 2 is arranged between the left hull 11 and the right hull 12. The collection net 2 is arranged between the left hull 11 and the right hull 12. During the progress of the hull, the water body can pass through the space between the left hull 11 and the right hull 12 at a relatively fast speed. The fast flowing water can more quickly guide planktonic algae into the collection net 2 for collection when passing through the collection net 2, improving the collection efficiency. The lifting rod 13 can be connected to a hook and a rope, facilitating the deployment of the sampling device on the water surface and its recovery after the sampling is completed.

[0026] Sling rings 6 are evenly distributed on the inner side of the outer sleeve 3 near one end of the collection port 20, and a rope body 7 is provided outside the collection port 20 and is respectively connected to each sling ring 6. The collection net 2 is flexibly connected to the inner side of the outer sleeve 3 at its front end through the rope body 7. When the unmanned boat 1 is in a stationary state, the tail end of the collection net 2 sags due to its own weight. When the unmanned boat 1 is moving forward, the water body acts on the rotating member 5 to form a swirling flow. At this time, a flow-through gap with a uniform spacing is formed between the outer sleeve 3 and the front part of the collection net 2 to achieve the shaping and cleaning ability of the collection net 2. In the above solution, the outer sleeve 3 is only arranged at the front end of the collection net 2 and the two are connected by the rope body 7, so that the initial load at the bottom of the unmanned boat 1 is relatively low, which is conducive to increasing the maximum load of the unmanned boat 1 during the collection process, thereby improving the collection volume of planktonic algae on the premise of ensuring the stability of the unmanned boat 1.

[0027] See the appendix Figure 6 Figure 6 , an inner kit 8 is also provided in the overcurrent gap. The inner kit 8 includes a first sleeve body 81. The first sleeve body 81 is arranged on the side of the rotating member 5 close to the valve 21. An outer layer gap is formed between the inner wall of the first sleeve body 81 and the outer sleeve 3, and an inner layer gap is formed between the outer periphery of the first sleeve body 81 and the collection net 2. The first sleeve body 81 has a diversion portion 82 at one end close to the rotating member 5. The diversion portion 82 inclines towards the center of the rear end of the collection net 2. After the rotating member 5 forms a swirling flow, it is divided into two swirling flows by the inner kit 8. One swirling flow enters the inner layer interval and, under the guidance of the diversion portion 82, flows along the outer periphery of the collection net 2 towards the center of its rear end, so that the planktonic algae clinging to the net body inside the collection net 2 can be relatively concentrated at the rear of the middle of the collection net 2, realizing centralized collection, facilitating the extraction of planktonic algae after the device is recovered ashore, avoiding blockage inside the mesh at the same time, ensuring the flow rate and velocity of the water passing through the collection net 2, reducing the water resistance received by the collection net 2, thereby reducing the water interference received by the unmanned ship 1 underwater and improving the navigation stability of the unmanned ship 1 during the collection process; The other swirling flow enters the outer layer interval and flows backward along the inner wall of the outer sleeve 3 to be released, forming the propulsion power of the unmanned ship 1 underwater, improving the traveling speed of the unmanned ship 1, helping to reduce the energy consumption of the unmanned ship 1 while improving the sampling efficiency of planktonic algae, prolonging the endurance time, enabling the sampling device to be deployed near the shore and move to waters farther from the shore for collection, and expanding the sampling selection range.

[0028] The outer wall of the outer sleeve is evenly distributed with fins 9. The fins 9 of the outer sleeve are used to separate the water flow, reduce the water resistance, and improve the stability.

[0029] Two mounting rods 4 are symmetrically arranged above the outer sleeve 3. The two mounting rods 4 are respectively connected to the left hull 11 and the right hull 12. The mounting rods 4 extend downward and are inclined with respect to the unmanned ship 1, so that the collection net 2 and the outer sleeve 3 are immersed in water to a certain depth, facilitating the sampling of planktonic algae.

[0030] The left hull 11 and the right hull 12 are respectively provided with propellers 14 at the tails. Each propeller 14 can be independently controlled remotely in terms of rotational speed and steering. By remotely and independently controlling each propeller 14, the unmanned ship 1 can move forward, backward, accelerate, decelerate, and turn as a whole.

[0031] An inertial navigation system and a main controller are installed on the unmanned ship 1. The main controller is used to read the signals of the inertial navigation system and control each propeller 14. By reading the signals of the inertial navigation system, the main controller judges the current azimuth and speed of the unmanned ship 1, and then controls the rotational speeds of the two propellers 14, so that the hull runs along a predetermined trajectory to achieve accurate sampling in a preset area.

[0032] The outer jacket 3 is provided with a diffusion part 32 at one end close to the valve 21. The diffusion part 32 is a conical sleeve. The small end of the diffusion part 32 is fixedly connected to the outer jacket 3. The inner kit 8 further includes a bracket 83. The first sleeve body 81 is connected to the outer jacket 3 through the bracket 83. One end of the first sleeve body 81 away from the diversion part 82 has an extension part 84. An outflow gap is formed between the outer jacket 3 and the extension part 84.

[0033] The rotation of the rotating part 5 drives the swirling flow generated by the water body to enter the outer layer interval, and under the guiding action of the diffusion part 32 and the extension part 84, it diffuses to the outside of the tail of the collection net 2 with the valve 21. The diffused swirling flow can reach the water surface and the valve 21. When the swirling flow reaches near the water surface, it can act on the propeller 14 at the tail of the unmanned boat 1. Since the unmanned boat 1 relies on the rotation of the propeller 14 to provide driving force when traveling on the water surface, when the propeller 14 stirs the water body during rotation, the plants and algae floating above the water surface and in the shallow water layer are easily entangled and attached to the propeller 14. The swirling flow diffusing backward outside can continuously guide the floating plants and algae away from the propeller 14, reducing the possibility of the propeller 14 being stuck when the unmanned boat 1 collects planktonic algae, thereby reducing the possibility that the unmanned boat 1 loses partial power or even all power and cannot turn or move forward, and reducing the probability that the unmanned boat 1 cannot be recovered ashore.

[0034] Since the collection net 2 is arranged in the lower space between the left hull 11 and the right hull 12, the diffusion part 32 can guide the water body passing through the outer wall of the outer jacket 3, so that the water body can act upward between the left hull 11 and the right hull 12, forming a cleaning of the side walls of the left hull 11 and the right hull 12 close to each other, reducing the cleaning difficulty of the sediment, algae, and floating objects attached to the side of the unmanned boat 1 after collection and recovery.

[0035] The swirling flow diffusing backward can also guide the floating objects below the water surface close to the valve 21, which is beneficial to reducing the risk of the valve 21 being blocked, thereby ensuring that the residual water body can be quickly discharged after the valve 21 is opened after the collection device is recovered, and improving the processing efficiency of the planktonic algae after the collection device completes the collection.

[0036] Before the collection work, the cleaned collection net 2 is installed on the unmanned boat 1 through the installation rod 4. The lifting hook is used to hang the lifting rod 13 to place the whole collection device on the water surface. After the collection device floats on the water surface, the lifting hook is unhooked. The remote control is used to control the unmanned boat 1 to point to the appropriate direction, and the start button is clicked to start the operation of the hull; The main controller judges the orientation and speed of the current collection device by reading the signals of the inertial navigation system, and thus controls the rotation speeds of the two propellers 14 respectively, so that the collection device runs along the predetermined trajectory; After the sampling is completed, the remote control is used to control the collection device to move near the sampling boat or the shore, and the lifting hook is used to lift or lift it ashore for recovery.

[0037] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A portable phytoplankton collection device, comprising: An unmanned boat (1) is provided with a transversely arranged collection net (2) below the unmanned boat (1), wherein the front end of the collection net (2) has an open collection port (20), the rear end of the collection net (2) is converged and connected to a valve (21), the front end of the collection net (2) is connected to an outer sleeve (3), and the outer sleeve (3) is connected to the unmanned boat (1).

2. The portable floating algae collection device according to claim 1 is characterized in that: A flow gap is formed between the inner wall of the outer sleeve (3) and the outer periphery of the collection net (2), and the flow gap is connected to the outside at both ends. A rotating member (5) is provided in the flow gap, and the rotating member (5) includes a rotating ring (51). The rotating ring (51) is rotatably connected to the inner side of the outer sleeve (3). The rotating ring (51) is surrounded by blades (52). The blades (52) have a curvature and the ends can contact the outer periphery of the collection net (2). The inner wall of the outer sleeve (3) is provided with a clamping ring (31) for limiting the position of the rotating ring (51).

3. The portable floating algae collection device according to claim 2 is characterized in that: The blade (52) is a flexible sheet.

4. The portable floating algae collection device according to claim 1 is characterized in that: The unmanned boat (1) comprises a left hull (11) and a right hull (12) which are arranged in the same direction and in parallel, a hoisting rod (13) is connected between the left hull (11) and the right hull (12), and the collection net (2) is arranged between the left hull (11) and the right hull (12).

5. The portable floating algae collecting device according to claim 1 is characterized in that: The inner side of the outer sleeve (3) close to one end of the collection port (20) is uniformly provided with hanging rings (6), and the outer side of the collection port (20) is provided with rope bodies (7) respectively connected to the hanging rings (6).

6. The portable floating algae collecting device according to claim 2 is characterized in that: An inner sleeve (8) is also provided in the flow gap, the inner sleeve (8) comprising a first sleeve body (81), the first sleeve body (81) being provided on a side of the rotating member (5) close to the valve (13), an outer layer gap being formed between the first sleeve body (81) and the inner wall of the outer sleeve body (3), an inner layer gap being formed between the first sleeve body (81) and the outer periphery of the collection net (2), the first sleeve body (81) having a flow guide portion (82) at one end close to the rotating member (5), the flow guide portion (82) being inclined towards the rear end center of the collection net (2).

7. The portable floating algae collecting device according to claim 1 is characterized in that: The outer wall of the outer casing (3) is evenly distributed with fins (9).

8. The portable floating algae collecting device according to claim 4 is characterized in that: Two mounting rods (4) are symmetrically arranged above the outer casing (3), and the two mounting rods (4) are respectively connected to the left hull (11) and the right hull (12).

9. The portable floating algae collecting device according to claim 4 is characterized in that: The left hull (11) and the right hull (12) are respectively provided with propellers (14) at the rear, and the rotation speed and steering of each propeller (14) can be independently controlled remotely.

10. The portable floating algae collecting device according to claim 9, characterized in that: An inertial navigation system and a main controller are installed on the unmanned ship (1), and the main controller is used to read signals from the inertial navigation system and control each of the propellers (14).

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