Automatic water-intake phytoplankton sampler

Abstract

The present invention discloses an automatic water-inletting phytoplankton sampler, which belongs to the field of plankton collection technology. An automatic water-inletting phytoplankton sampler comprises a sampling box, the lower end of which is mounted on a mounting chassis, a plurality of groups of connecting hooks are evenly mounted around the upper side of the mounting chassis, an interception cover is arranged inside the sampling box, a hollow cylinder is arranged in the center of the interception cover, a water inlet bucket is arranged on the upper end of the hollow cylinder, the water inlet bucket is movably connected to the hollow cylinder, a mounting frame is arranged on the outer edge of the upper end of the water inlet bucket, the mounting frame is fixedly connected to the upper side of the sampling box, and a water depth sensing probe is arranged around the mounting chassis; a sample discharge port is opened in the center of one side of the sampling box, and a sealing cover is matched on the outside of the sample discharge port; the present invention solves the problem that the samples of corresponding water depth cannot be accurately collected by artificial trawling in the prior art, which makes the subsequent research and evaluation results inaccurate.

Description

Technical Field

[0001] The invention belongs to the technical field of plankton collection, and in particular relates to an automatic water-inlet type plankton sampler. Background Art

[0002] Zooplankton plays an important role in freshwater ecosystems. The richness of their species and the changes in their total number are closely related to the fluctuations in nutrients in the watershed. They can usually monitor the quality of the watershed and self-purify water pollution, and play a regulatory role in river and sea ecosystems. Currently, zooplankton is an important indicator for estimating the health of the ecological environment in watersheds, and is also used as a biological indicator of changes on a global scale. Phytoplankton is an autotrophic primary producer in aquatic ecosystems. The fluctuations in their species abundance and community composition will have varying degrees of impact on the structural functions of the water environment and the carbon sequestration activities of the watershed. It is one of the important biological indicators that can quickly respond to the physiological and ecological environment of the watershed. Many studies have been conducted on the effects of zooplankton on the physiological ecology and resource development of river basins. Therefore, collecting zooplankton is an important part of the above research.

[0003] Most of the phytoplankton samplers in the prior art rely on manually dragging a collection net to collect phytoplankton into the collection net, which is inconvenient to operate and has low accuracy. In addition, since phytoplankton is vertically distributed in the water body according to the living habits of different species of organisms, when the data related to phytoplankton is used as various indicators for evaluating the water body, the samples collected in the water body at different depths can provide different feedback information. Therefore, the commonly used manual trawling collection method cannot accurately collect samples of the corresponding water depth, which will have a great impact on the subsequent research and evaluation results. Therefore, the present invention arranges an automatic water inlet counterweight to assist the sampler to enter the water body, and performs sampling after reaching a certain depth, so that the collected samples correspond to the water depth, thereby improving the accuracy of the subsequent research and evaluation results, so as to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the following problems in the prior art:

[0005] (1) The existing technology of collecting samples by manual trawling cannot accurately collect samples of corresponding water depth, making the subsequent research and evaluation results inaccurate.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An automatic water-intake phytoplankton sampler comprises a sampling box, the lower end of which is mounted on a mounting chassis, a plurality of groups of connecting hooks are evenly mounted around the upper side of the mounting chassis, an interception cover is arranged inside the sampling box, a hollow cylinder is arranged in the center of the interception cover, a water inlet bucket is arranged at the upper end of the hollow cylinder, the water inlet bucket is movably connected to the hollow cylinder, a mounting frame is arranged at the outer edge of the upper end of the water inlet bucket, the mounting frame is fixedly connected to the upper side of the sampling box, and a water depth sensing probe is arranged around the mounting chassis;

[0008] A sample discharge port is provided in the center of one side of the sampling box, and a sealing cover is matched outside the sample discharge port. The lower side of the sealing cover is slidably connected to the annular rail; the annular rail is fixedly connected to the lower part of the outer side of the sampling box, a driving rail is provided at the lower end of the sealing cover, and a sealing strip is provided around the annular rail.

[0009] Preferably, the sampling box is movably connected to an attachment net, which is arranged on the upper side of the lifting water bag, and the lower side of the lifting water bag is fixedly connected to the bottom end of the sampling box; interception filters are evenly arranged around the interception cover, and the interception filter is fixedly connected to the interception cover.

[0010] Preferably, a plurality of water pipes are evenly distributed around the lower end of the mounting chassis, and one end of the water pipe passes through the mounting chassis, the sampling box and the lifting water bag; an overflow port is provided on the upper side of the lifting water bag, and electric-controlled valves are provided in the overflow port and the water pipe, and a water inlet pump is provided in the water pipe.

[0011] Preferably, a receiving opening is opened in the center of the upper end of the sampling box, a water diversion hood is movably connected in the receiving opening, a transmission gear ring is fixedly connected to the upper end of the water diversion hood, and a driving wheel is meshingly connected to one side of the transmission gear ring; a motor is arranged at the lower end of the driving wheel axis, the water depth sensing probe is electrically connected to the motor through a processor, and the motor is arranged inside the upper end of the sampling box.

[0012] Preferably, a water inlet ring is fixedly connected to the inner edge of the upper end of the hollow cylinder, and water inlets are evenly opened on the water inlet ring. An annular closing plate is movably matched on the upper side of the water inlet, and the annular closing plate is fixedly connected to the inner edge of the lower side of the water inlet bucket, and the water inlet ring is movably connected to the lower side of the annular closing plate; the water diversion hood is located above the interception hood, and a certain gap is reserved between the water diversion hood and the interception hood, and the diameter of the upper side of the water diversion hood is larger than the diameter of the outer edge of the water inlet ring.

[0013] Preferably, a sealing layer is movably provided inside the intercepting cover, a sealing plate is provided on the sealing layer, and the sealing plate is movably contacted with the inner edge of the intercepting filter; a connecting cover is fixedly connected to the center of the outer wall of the hollow cylinder, a connecting ring is fixedly connected to the outer edge of the lower end of the connecting cover, and the outer edge of the connecting ring is fixedly connected to the inner side of the sealing layer.

[0014] Preferably, a water collecting cover is fixedly connected to the lower end of the blocking layer, a water driving pump is arranged inside the lower end of the water collecting cover, a drainage groove is opened in the center of the connecting ring, and the water collecting cover and the water driving pump are sealed.

[0015] Preferably, a fixing frame is fixedly connected to the center of the hollow cylinder, a bidirectional cylinder is fixedly connected to the center of the fixing frame, the ends of the output shafts at both ends of the bidirectional cylinder are fixedly connected to blocking balls, the two groups of output shafts of the bidirectional cylinder can be independently controlled to extend and retract, and the water depth sensing probe is electrically connected to the bidirectional cylinder through a processor.

[0016] Preferably, the upper and lower ends of the hollow cylinder are respectively connected to water storage covers, a sealing groove is opened in the center of the water storage cover, and the sealing ball is movably connected in the sealing groove; the lower end of the hollow cylinder is fixedly connected to a drainage cover, and the drainage cover is located above the water drive pump.

[0017] Compared with the prior art, the present invention provides an automatic water-intake phytoplankton sampler, which has the following beneficial effects:

[0018] (1) The present invention provides a hollow cylinder, which can cooperate with a water depth sensing probe to determine the sampling position and maintain stability when the sampling depth is reached, thereby combining the automatic water inlet function with the water depth positioning function to ensure the accuracy of the sample collection results.

[0019] (2) The present invention sets an interception cover in the sampling box, thereby realizing separation of the sample and the water body when water is automatically introduced. After being filtered by the interception filter, the phytoplankton is retained in the sampling box, and the water flows along the interception filter into the interception cover. The phytoplankton can be introduced into the sampling box by the water flow, and the water can be drained in time to reduce the capacity burden in the sampling box, thereby making the sampling process more efficient.

[0020] (3) The present invention provides a lifting water bag, and the water in the lifting water bag is retained for flushing during sample collection, so that the collected samples can be discharged from the sampling box smoothly. In addition, since the water in the lifting water bag is at a similar depth to the water body when the sample is collected, the microorganisms and other components in this part of the water body can also be used as part of the evaluation indicators for subsequent research, and this part of the water body can be used to provide nutrients for the collected phytoplankton within a short period of time after leaving the water body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of an automatic water-filling phytoplankton sampler proposed by the present invention;

[0022] Figure 2 A schematic diagram of the structure of an automatic water-intake phytoplankton sampler in another state proposed by the present invention;

[0023] Figure 3 A schematic diagram of the partial structure of an automatic water-filling phytoplankton sampler proposed by the present invention Figure 1 ;

[0024] Figure 4 A schematic diagram of the partial structure of an automatic water-filling phytoplankton sampler proposed by the present invention Figure 2 ;

[0025] Figure 5 A schematic diagram of the partial structure of an automatic water-filling phytoplankton sampler proposed by the present invention Figure 3 ;

[0026] Figure 6 A schematic diagram of the partial structure of an automatic water-filling phytoplankton sampler proposed by the present invention Figure 4 ;

[0027] Figure 7 A schematic diagram of the partial structure of an automatic water-filling phytoplankton sampler proposed by the present invention Figure 5 ;

[0028] Figure 8 A schematic diagram of the partial structure of an automatic water-filling phytoplankton sampler proposed by the present invention Figure 6 ;

[0029] Fig. 9 A schematic diagram of the partial structure of an automatic water-filling phytoplankton sampler proposed by the present invention Figure 7 ;

[0030] Fig.10 A schematic diagram of the partial structure of an automatic water-filling phytoplankton sampler proposed by the present invention Figure 8 .

[0031] Description of the numbers in the figure:

[0032] 1. Sampling box; 2. Mounting chassis; 3. Water inlet bucket; 301. Water inlet ring; 302. Water inlet; 303. Water diversion cover; 304. Annular closing plate; 305. Driving wheel; 306. Transmission gear ring; 4. Mounting frame; 5. Sealing cover; 501. Annular rail; 6. Water guide pipe; 7. Connecting hook; 8. Sample outlet; 9. Intercepting cover; 901. Intercepting filter; 902. Water collecting cover; 10. Hollow cylinder; 1001. Drainage cover; 1002. Fixed frame; 1003. Two-way cylinder; 1004. Sealing sphere; 1005. Water storage cover; 1006. Connecting cover; 1007. Connecting ring; 11. Attachment net; 12. Lifting water bag; 13. Sealing layer; 1301. Sealing plate; 14. Water pump. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] Embodiment 1:

[0036] See also Figure 1-6 , an automatic water-intake phytoplankton sampler, comprising a sampling box 1, the lower end of the sampling box 1 is mounted on a mounting chassis 2, a plurality of groups of connecting hooks 7 are evenly mounted around the upper side of the mounting chassis 2, an interception cover 9 is arranged inside the sampling box 1, a hollow cylinder 10 is arranged in the center of the interception cover 9, a water inlet bucket 3 is arranged at the upper end of the hollow cylinder 10, the water inlet bucket 3 is movably connected to the hollow cylinder 10, a mounting frame 4 is arranged at the outer edge of the upper end of the water inlet bucket 3, the mounting frame 4 is fixedly connected to the upper side of the sampling box 1, and a water depth sensing probe is arranged around the mounting chassis 2;

[0037] A sample discharge port 8 is provided in the center of one side of the sampling box 1, and a sealing cover 5 is matched outside the sample discharge port 8, and the lower side of the sealing cover 5 is slidably connected to the annular rail 501; the annular rail 501 is fixedly connected to the lower part of the outer side of the sampling box 1, and a driving rail is provided at the lower end of the sealing cover 5, and a sealing strip is provided around the annular rail 501;

[0038] The sampling box 1 is movably connected with an attachment net 11, which is arranged on the upper side of the lifting water bag 12, and the lower side of the lifting water bag 12 is fixedly connected to the bottom end of the sampling box 1; the interception filter 901 is evenly arranged around the interception cover 9, and the interception filter 901 is fixedly connected to the interception cover 9;

[0039] A plurality of water pipes 6 are evenly arranged around the lower end of the mounting chassis 2, and one end of the water pipe 6 passes through the mounting chassis 2, the sampling box 1 and the lifting water bag 12; an overflow port is arranged on the upper side of the lifting water bag 12, and an electric control valve is arranged in the overflow port and the water pipe 6, and a water inlet pump is arranged in the water pipe 6;

[0040] An accommodating opening is provided at the center of the upper end of the sampling box 1, and a water diversion cover 303 is movably connected in the accommodating opening. A transmission gear ring 306 is fixedly connected to the upper end of the water diversion cover 303, and a driving wheel 305 is meshedly connected to one side of the transmission gear ring 306; a motor is provided at the lower end of the axis of the driving wheel 305, and the water depth sensing probe is electrically connected to the motor through a processor, and the motor is provided inside the upper end of the sampling box 1;

[0041] The present invention arranges multiple groups of connecting hooks 7 on the mounting chassis 2, and when in use, the device is stably suspended on the hull with ropes, and the device is pressed vertically into the water surface in conjunction with the force-applying structure until it is completely submerged in the water and the force is stopped. At this time, the water surface is higher than the upper edge of the water inlet bucket 3, and the water enters the hollow column 10 along the water inlet bucket 3 to act as a counterweight. The sampling position is determined in conjunction with the water depth sensing probe, and then the hollow column 10 is blocked to prevent water from entering.

[0042] When the specified depth position is reached, the water depth sensing probe starts the motor through the processor control, and the motor drives the driving wheel 305 to rotate, and the driving wheel 305 drives the transmission gear ring 306 to rotate, so that the water body enters the sampling box 1, and is filtered by the interception filter 901, and the phytoplankton is intercepted in the sampling box 1, and the water flows along the interception filter 901 into the interception cover 9; at the same time, the water pipe 6 is driven by the water pump to fill the lifting water bag 12 with water, so that the lifting water bag 12 lifts the attachment net 11 upward in the state of gradually filling with water and expanding, so that the lower limit of the water level in the sampling box 1 is raised to the bottom layer of the interception filter 901, so as to achieve full separation of the sample and the water body when water enters, so that the water body is completely discharged from the sampling box 1 and enters the interception cover 9, and after the water body is drained, the collected phytoplankton is attached to the attachment net 11;

[0043] In addition, the water stored in the lifting water bag 12 should be retained until the sample is discharged. After the sample collection is completed, the water in the hollow column 10 should be drained, and then the device should be suspended and lifted by a rope, and then the device should be in an inclined state, the sample discharge port 8 should be aligned with the sample collection area, and then the electric control valve in the overflow port should be opened to allow the stored water in the lifting water bag 12 to overflow and backwash the samples collected on the attachment net 11. At this time, the phytoplankton can be flushed out of the sample discharge port 8 with the water flow to complete the smooth collection.

[0044] Embodiment 2:

[0045] like Figure 6-8 As shown, the difference based on Example 1 is that:

[0046] The inner edge of the upper end of the hollow cylinder 10 is fixedly connected with a water inlet ring 301, and water inlets 302 are evenly opened on the water inlet ring 301. The upper side of the water inlet 302 is movably matched with an annular closing plate 304, and the annular closing plate 304 is fixedly connected to the inner edge of the lower side of the water inlet bucket 3, and the water inlet ring 301 is movably connected to the lower side of the annular closing plate 304; the water diversion cover 303 is located above the interception cover 9, and a certain gap is reserved between the water diversion cover 303 and the interception cover 9, and the upper side diameter of the water diversion cover 303 is larger than the outer edge diameter of the water inlet ring 301;

[0047] A blocking layer 13 is movably arranged inside the interception cover 9, and a blocking plate 1301 is arranged on the blocking layer 13, and the blocking plate 1301 is movably in contact with the inner edge of the interception filter 901; a connecting cover 1006 is fixedly connected to the center of the outer wall of the hollow cylinder 10, and a connecting ring 1007 is fixedly connected to the outer edge of the lower end of the connecting cover 1006, and the outer edge of the connecting ring 1007 is fixedly connected to the inner side of the blocking layer 13;

[0048] The lower end of the blocking layer 13 is fixedly connected with a water collecting cover 902, and a water pump 14 is arranged inside the lower end of the water collecting cover 902. A drainage groove is provided in the center of the connecting ring 1007, and the water collecting cover 902 and the water pump 14 are sealed and connected.

[0049] The present invention provides a water guide cover 303. When the driving wheel 305 drives the transmission gear ring 306 to rotate, the transmission gear ring 306 drives the water inlet ring 301 to deflect, so that the water inlet 302 and the annular closing plate 304 are closed and misaligned, so that the water flow can enter the water guide cover 303 along the water inlet 302, and enter between the sampling box 1 and the interception cover 9 along the water guide cover 303;

[0050] Under the action of the intercepting filter 901, the water separated from the sample enters the intercepting cover 9, enters the water collecting cover 902 along the connecting cover 1006, and is discharged under the action of the water driving pump 14; it should be noted that the function of setting the connecting cover 1006 is not only to divert water as mentioned above, but also to establish a connection relationship with the blocking layer 13 through the connecting ring 1007. When the driving wheel 305 drives the transmission gear ring 306 to rotate, the transmission gear ring 306 can drive the blocking layer 13 to rotate through the hollow cylinder 10 and the connecting cover 1006, and the blocking plate 1301 on the blocking layer 13 is displaced accordingly, so that the blocking plate 1301 is moved away from the contact part of the inner layer of the intercepting filter 901, that is, the intercepting filter 901 is in an open state when the sampling box 1 is taking in water, so as to achieve the technical effect of separating samples while taking in water; when the sampling is completed, the driving wheel 305 is used to reversely drive, and the intercepting filter 901 is blocked by the blocking plate 1301 while closing the water inlet 302.

[0051] Embodiment 3:

[0052] like Figure 8-10, based on Example 1-2, what is different is that:

[0053] A fixing frame 1002 is fixedly connected to the center of the hollow cylinder 10, a bidirectional cylinder 1003 is fixedly connected to the center of the fixing frame 1002, and the ends of the output shafts at both ends of the bidirectional cylinder 1003 are fixedly connected to blocking spheres 1004. The two sets of output shafts of the bidirectional cylinder 1003 can be independently controlled to extend and retract, and the water depth sensing probe is electrically connected to the bidirectional cylinder 1003 through the processor;

[0054] The upper and lower ends of the hollow cylinder 10 are respectively connected to a water storage cover 1005, a blocking groove is provided in the center of the water storage cover 1005, and a blocking ball 1004 is movably connected in the blocking groove; the lower end of the hollow cylinder 10 is fixedly connected to a drainage cover 1001, and the drainage cover 1001 is located above the water pump 14;

[0055] The present invention arranges a bidirectional cylinder 1003 in the hollow column 10. When the water counterweight flows into the hollow column 10, the output shaft at the upper end of the bidirectional cylinder 1003 is retracted, and the output shaft drives the blocking sphere 1004 to move downward to escape from the blocking groove on the water storage cover 1005. The water flows into the hollow column 10 along the gap between the blocking sphere 1004 and the water storage cover 1005. When the water reaches the specified water depth, the water flows into the hollow column 10 through the bidirectional cylinder 1003. The output shaft at the end is extended to drive the blocking sphere 1004 to block the water storage cover 1005 above, so that the position of the device body is relatively stable; when the sampling is completed and the water in the hollow column 10 needs to be drained, the output shaft at the lower end of the two-way cylinder 1003 contracts, driving the blocking sphere 1004 to separate from the blocking groove of the water storage cover 1005 below, and the water flows through the blocking groove below and the drainage cover 1001 into the water collecting cover 902, and is discharged by the water drive pump 14.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic water-intake phytoplankton sampler, comprising a sampling box (1), characterized in that: The lower end of the sampling box (1) is mounted on the mounting chassis (2), and a plurality of groups of connecting hooks (7) are evenly mounted around the upper side of the mounting chassis (2). An interception cover (9) is arranged inside the sampling box (1), and a hollow cylinder (10) is arranged in the center of the interception cover (9). A water inlet bucket (3) is arranged at the upper end of the hollow cylinder (10), and the water inlet bucket (3) is movably connected to the hollow cylinder (10). A mounting frame (4) is arranged at the outer edge of the upper end of the water inlet bucket (3), and the mounting frame (4) is fixedly connected to the upper side of the sampling box (1). A water depth sensing probe is arranged around the mounting chassis (2); A sample discharge port (8) is provided in the center of one side of the sampling box (1), and a sealing cover (5) is provided outside the sample discharge port (8), and the lower side of the sealing cover (5) is slidably connected to the annular rail (501); the annular rail (501) is fixedly connected to the lower part of the outer side of the sampling box (1), and a driving rail is provided at the lower end of the sealing cover (5), and a sealing strip is provided around the annular rail (501); A receiving opening is provided at the center of the upper end of the sampling box (1), a water diversion hood (303) is movably connected in the receiving opening, a transmission gear ring (306) is fixedly connected to the upper end of the water diversion hood (303), and a driving wheel (305) is meshedly connected to one side of the transmission gear ring (306); a motor is provided at the lower end of the axis of the driving wheel (305), the water depth sensing probe is electrically connected to the motor via a processor, and the motor is provided inside the upper end of the sampling box (1); A water inlet ring (301) is fixedly connected to the inner edge of the upper end of the hollow cylinder (10), and water inlets (302) are evenly arranged on the water inlet ring (301). An annular closing plate (304) is movably matched on the upper side of the water inlet (302), and the annular closing plate (304) is fixedly connected to the inner edge of the lower side of the water inlet bucket (3), and the water inlet ring (301) is movably connected to the lower side of the annular closing plate (304); the water diversion cover (303) is located above the interception cover (9), and a certain gap is reserved between the water diversion cover (303) and the interception cover (9), and the upper side diameter of the water diversion cover (303) is larger than the outer edge diameter of the water inlet ring (301).

2. The automatic water-intake phytoplankton sampler according to claim 1, characterized in that: The sampling box (1) is movably connected to an attachment net (11) inside, the attachment net (11) is arranged on the upper side of the lifting water bag (12), and the lower side of the lifting water bag (12) is fixedly connected to the bottom end of the sampling box (1); interception filter nets (901) are evenly arranged around the interception cover (9), and the interception filter nets (901) are fixedly connected to the interception cover (9).

3. The automatic water-intake phytoplankton sampler according to claim 2, characterized in that: A plurality of water pipes (6) are evenly distributed around the lower end of the mounting chassis (2), and one end of the water pipe (6) passes through the mounting chassis (2), the sampling box (1) and the lifting water bag (12); an overflow port is provided on the upper side of the lifting water bag (12), and an electric control valve is provided in the overflow port and the water pipe (6), and a water inlet pump is provided in the water pipe (6).

4. The automatic water-intake phytoplankton sampler according to claim 3, characterized in that: A blocking layer (13) is movably arranged inside the interception cover (9), a blocking plate (1301) is arranged on the blocking layer (13), and the blocking plate (1301) is in movably contact with the inner edge of the interception filter (901); a connecting cover (1006) is fixedly connected to the center of the outer wall of the hollow cylinder (10), a connecting ring (1007) is fixedly connected to the outer edge of the lower end of the connecting cover (1006), and the outer edge of the connecting ring (1007) is fixedly connected to the inner side of the blocking layer (13).

5. The automatic water-intake phytoplankton sampler according to claim 4, characterized in that: The lower end of the blocking layer (13) is fixedly connected to a water collecting cover (902), a water driving pump (14) is arranged inside the lower end of the water collecting cover (902), a drainage groove is provided in the center of the connecting ring (1007), and the water collecting cover (902) and the water driving pump (14) are sealed.

6. The automatic water-intake phytoplankton sampler according to claim 5, characterized in that: A fixing frame (1002) is fixedly connected to the center of the hollow cylinder (10), a bidirectional cylinder (1003) is fixedly connected to the center of the fixing frame (1002), and blocking spheres (1004) are fixedly connected to the ends of output shafts at both ends of the bidirectional cylinder (1003). The two groups of output shafts of the bidirectional cylinder (1003) can be independently controlled to extend and retract, and the water depth sensing probe is electrically connected to the bidirectional cylinder (1003) via a processor.

7. The automatic water-intake phytoplankton sampler according to claim 6, characterized in that: The upper and lower ends of the hollow column (10) are respectively connected to water storage covers (1005), a sealing groove is provided in the center of the water storage cover (1005), and the sealing ball (1004) is movably connected in the sealing groove; the lower end of the hollow column (10) is fixedly connected to a drainage cover (1001), and the drainage cover (1001) is located above the water drive pump (14).

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