An investigation sampling device for evaluating the impact of herbicides on marine biodiversity

Abstract

The present invention relates to an investigation and sampling device for evaluating the impact of herbicides on marine biodiversity. The sampling device includes a displacement device for floating on seawater and changing its own position; a rotating shaft provided on the displacement device; a plurality of sampling groups arranged along the axial direction of the rotating shaft, each sampling group includes a plurality of connecting rods arranged circumferentially along the rotating shaft, and a fishing net is provided at one end of the connecting rod away from the rotating shaft; the present invention can separately collect plankton at different depths, and will not cause interference to other water layers during the collection process, and the present application can collect samples at a fixed depth for a long time, which can ensure the accuracy of sampling; phytoplankton in the ocean is not only the basis of the marine food chain, but also an important driver of marine carbon fixation and marine biogeochemical cycles. Studying the growth of plankton and the impact of herbicides on plankton can evaluate the impact of herbicides on marine biodiversity.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental protection, and particularly relates to an investigation and sampling device for evaluating the impact of herbicides on marine biodiversity. Background Art

[0002] As a toxic substance, serious herbicide pollution problems have been reported in the land rivers or groundwater of many countries. However, all rivers flow into the sea, and a large number of pollutants will eventually enter the ocean. At present, people know very little about the current situation of herbicide pollution in the ocean. The investigation and evaluation of marine biodiversity are important means to protect the marine ecosystem, maintain the marine ecological balance and rationally utilize marine biological resources.

[0003] The investigation of marine biodiversity is a complex and arduous task, which requires the assistance of various investigation techniques and means. One of them is to collect plankton and analyze and study it.

[0004] Most of the existing plankton sampling devices disclosed in the prior art adopt the trawling collection method. The working principle is to use a collection ship or other power mechanisms on the ship in the target sea area to drive the collector to vertically or horizontally drag and collect at the target depth in the target sea area. During the dragging and collecting process, due to the large volume of the trawl and relatively fast movement speed, the stirred water flow will disturb the active water layers of plankton, fish and other organisms in the collection area, and to a certain extent, it will lead to inaccurate results such as the collection volume and the types of plankton; due to the certain length of the trawl itself, it is not convenient to sample in shallow water areas; when vertically or horizontally dragging the net to collect samples, it is impossible to collect samples at a fixed depth for a long time; during the process of recovering the collection device from the deep water target position to the collection ship, as the device moves rapidly upward, the resistance between the device and the water and the impact of the water flow on the collection device will greatly reduce the service life. Summary of the Invention

[0005] The purpose of the present invention is to provide an investigation and sampling device for evaluating the impact of herbicides on marine biodiversity in order to solve the problems raised in the above background art.

[0006] The present invention realizes the above purpose through the following technical solutions:

[0007] An investigation and sampling device for evaluating the impact of herbicides on marine biodiversity, comprising:

[0008] A displacement device for floating on the sea water and changing its own position;

[0009] A rotating shaft provided on the displacement device;

[0010] A number of sampling groups arranged axially along the rotating shaft, each sampling group includes a number of connecting rods arranged circumferentially along the rotating shaft, a fishing net is provided at one end of the connecting rod away from the rotating shaft, and the mouth of the fishing net faces the direction of its moving track so that the fishing net can collect plankton in the water during rotation; and

[0011] A driving component provided on the displacement device for driving the rotating shaft to rotate;

[0012] Collect the plankton with the fishing net, and analyze the plankton to evaluate the impact of herbicides on marine biodiversity.

[0013] Preferably, the displacement device is an engine boat or a remotely controlled electric boat.

[0014] Preferably, the driving component includes a driving motor, a first gear is provided at the output shaft end of the driving motor, and a second gear meshing with the first gear is provided at one end of the rotating shaft close to the driving motor.

[0015] Preferably, the tooth number ratio of the second gear to the first gear is greater than 10.

[0016] Preferably, a box body is provided on the displacement device, and the driving motor is arranged in the box body;

[0017] A shaft hole concentric with its axis is provided in the rotating shaft. A sleeve connected to the box body is provided at the shaft hole. A connecting rod is provided in the sleeve. A synchronous belt for driving the connecting rod to rotate is provided between the connecting rod and the driving motor. A housing is provided at one end of the sleeve away from the driving motor. A first bevel gear is provided at one end of the connecting rod in the housing. A second bevel gear meshing with the first bevel gear is provided in the housing. A propeller extending outside the housing is provided on the second bevel gear. When the propeller rotates, it provides power to one end of the rotating shaft away from the driving motor so that the rotating shaft remains vertical in the water.

[0018] Preferably, an electric push rod is provided on the box body, a ring is sleeved on the rotating shaft and connected to the electric push rod, a number of racks are provided on one side of the ring away from the box body, and a toothed ring corresponding to and meshing with the racks is provided on the connecting rod. The racks are used to drive the connecting rod to rotate.

[0019] Preferably, the fishing net is cylindrical, and magnetic strips with opposite polarities are provided at both ends of the fishing net.

[0020] The beneficial effects of the present invention are as follows:

[0021] The present invention can separately collect plankton at different depths, and will not interfere with other water layers during the collection process. Moreover, the present application can collect samples at a fixed depth for a long time, which can ensure the accuracy of sampling. By analyzing and studying the growth status of plankton, the impact of herbicides on marine biodiversity can be accurately evaluated. Description of the Drawings

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is Figure 1 an enlarged schematic diagram of part A in

[0024] Figure 3 is Figure 1 an enlarged schematic diagram of part B in

[0025] Figure 4 is a schematic diagram of the structure of the present invention after sampling is completed;

[0026] Figure 5 is a schematic diagram of the positional relationship between the rack and the gear ring in the present invention.

[0027] In the figure: 1, displacement device; 2, rotating shaft; 3, connecting rod; 4, fishing net; 5, driving motor; 6, first gear; 7, second gear; 8, box body; 9, sleeve; 10, connecting rod; 11, synchronous belt; 12, housing; 13, first bevel gear; 14, second bevel gear; 15, propeller; 16, electric push rod; 17, ring; 18, rack; 19, gear ring. Detailed implementation manners

[0028] The following further describes the present application in detail. It is necessary to point out here that the following specific implementation manners are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0029] Embodiment 1

[0030] As Figures 1-5 shown, an investigation and sampling device for evaluating the impact of herbicides on marine biodiversity includes:

[0031] A displacement device 1 for floating on the sea water and changing its own position;

[0032] A rotating shaft 2 provided on the displacement device 1;

[0033] A plurality of sampling groups arranged along the axial direction of the rotating shaft 2, each sampling group includes a plurality of connecting rods 3 arranged circumferentially along the rotating shaft 2, and a fishing net 4 is provided at one end of the connecting rod 3 away from the rotating shaft 2, and the mouth of the fishing net 4 faces the direction of its moving track so that the fishing net 4 can collect plankton in the water when rotating; and

[0034] A driving assembly provided on the displacement device 1 for driving the rotating shaft 2 to rotate.

[0035] It should be noted that when the herbicides remaining in the soil are discharged into the sea water, they may affect marine biodiversity by inhibiting the growth of marine phytoplankton. More than half of the herbicides are photosynthesis inhibitors, which can have a serious negative effect on the photosynthetic physiology of phytoplankton (or microalgae) at high concentrations. Phytoplankton in the ocean contribute to nearly half of the global photosynthesis of green plants. They are not only the basis of the marine food chain, but also important drivers of marine carbon fixation and marine biogeochemical cycles. Studying the growth of plankton and the impact of herbicides on plankton can be used to evaluate the impact of herbicides on marine biodiversity. The whole device is placed into the sea water, and the displacement device 1 drives the whole device to move in the sea water. During the movement of the device, the driving component drives the rotating shaft 2 to rotate, and the rotating shaft 2 drives each fishing net 4 to rotate circumferentially. When the fishing net 4 rotates, it can collect the plankton on its moving path and temporarily store the plankton in the fishing net 4. The connecting rod 3 is rotatably connected to the rotating shaft 2. When the fishing net 4 rotates, the opening of the fishing net 4 faces the direction of its movement, and the plankton can be smoothly caught by the fishing net 4. When the number of plankton in the fishing net 4 increases, the weight of the fishing net 4 increases, and the opening of the fishing net 4 gradually rotates upward. When the whole device is salvaged, the opening of the fishing net 4 faces upward, which can prevent the loss of plankton in the fishing net 4.

[0036] The displacement device 1 is an engine boat or a remotely controlled electric boat.

[0037] The driving component includes a driving motor 5. A first gear 6 is provided at the output shaft end of the driving motor 5. A second gear 7 that meshes with the first gear 6 is provided at one end of the rotating shaft 2 close to the driving motor 5. The driving motor 5 drives the first gear 6 to rotate, and the first gear 6 drives the second gear 7 to rotate, so that the rotating shaft 2 rotates.

[0038] The tooth number ratio of the second gear 7 to the first gear 6 is greater than 10. The tooth number and diameter of the first gear 6 are both smaller than those of the second gear 7, which can not only achieve a certain labor-saving effect, but also make the rotation speed of the second gear 7 not too fast, and can reduce the resistance received when the fishing net 4 rotates.

[0039] A box body 8 is provided on the displacement device 1, and the driving motor 5 is arranged in the box body 8;

[0040] The rotating shaft 2 is provided with a shaft hole concentric with its axis. At the shaft hole, there is a sleeve 9 connected to the box body 8. Inside the sleeve 9, there is a connecting rod 10. Between the connecting rod 10 and the driving motor 5, there is a synchronous belt 11 for driving the connecting rod 10 to rotate. At one end of the sleeve 9 away from the driving motor 5, there is a housing 12. At one end of the connecting rod 10 inside the housing 12, there is a first bevel gear 13. Inside the housing 12, there is a second bevel gear 14 meshing with the first bevel gear 13. On the second bevel gear 14, there is a propeller 15 extending outside the housing 12. When the propeller 15 rotates, it provides power to one end of the rotating shaft 2 away from the driving motor 5 so that the rotating shaft 2 remains vertical in water. The housing 12, the sleeve 9, and the box body 8 are fixedly connected, so that the working direction of the propeller 15 always remains in the same direction as the moving direction of the displacement device 1. When the driving motor 5 works, it drives the connecting rod 10 to rotate through the synchronous belt 11. The connecting rod 10 drives the first bevel gear 13 to rotate. The first bevel gear 13 drives the second bevel gear 14 to rotate. The second bevel gear 14 drives the propeller 15 to rotate. The propeller 15 generates thrust in water. The reaction thrust of water on the propeller 15 causes the propeller 15 to drive the housing 12 and the rotating shaft 2 to move, so that one end of the rotating shaft 2 away from the displacement device 1 can rotate towards the moving direction of the displacement device 1. Under the action of the propeller 15, the rotating shaft 2 maintains a vertical state, which can enable the displacement device 1 to move normally and avoid the rotating shaft 2 from tilting due to large resistance. After the sampling work is completed, the box body 8 is removed from the displacement device 1, and then all the fishing nets 4 can be transported to the laboratory.

[0041] An electric push rod 16 is provided on the box body 8. A ring 17 connected to the electric push rod 16 is sleeved on the rotating shaft 2. On one side of the ring 17 away from the box body 8, there are several racks 18. On the connecting rod 3, there is a gear ring 19 corresponding to and meshing with the racks 18. The racks 18 are used to drive the connecting rod 3 to rotate. When the electric push rod 16 extends, it drives the ring 17 away from the box body 8. The ring 17 drives the racks 18 to move. The racks 18 drive the connecting rod 3 to rotate. When the connecting rod 3 rotates, the fishing net 4 rotates. When catching plankton, it locks the opening direction of the fishing net 4, which can maximize the fishing efficiency of the fishing net 4. When retracting or completing sampling, the opening direction of the fishing net 4 is controlled so that the opening direction of the fishing net 4 faces upward, which can reduce the number of plankton falling out of the fishing net 4.

[0042] The fishing net 4 is cylindrical. At both ends of the fishing net 4, there are magnetic strips with opposite polarities. When the opening of the fishing net 4 faces upward, two adjacent fishing nets 4 intersect head to tail in the vertical direction. The magnetic strips at the head and tail ends of the fishing net 4 have opposite polarities and attract each other, so that the head and tail of the fishing net 4 are sucked together. The upper fishing net 4 can block the opening of the lower fishing net 4, further improving the leak-proof performance of the fishing net 4.

[0043] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention.

Claims

1. An investigation and sampling device for evaluating the impact of herbicides on marine biodiversity, characterized in that, it includes: A displacement device (1) for floating on the sea water and changing its own position; A rotating shaft (2) provided on the displacement device (1); A number of sampling groups arranged along the axial direction of the rotating shaft (2), each sampling group includes a number of connecting rods (3) arranged circumferentially along the rotating shaft (2), and a fishing net (4) is provided at one end of the connecting rod (3) away from the rotating shaft (2), and the mouth of the fishing net (4) faces the direction of its moving track so that the fishing net (4) can collect plankton in the water when rotating; And A driving component provided on the displacement device (1) for driving the rotating shaft (2) to rotate; the driving component includes a driving motor (5), a first gear (6) is provided at the output shaft end of the driving motor (5), and a second gear (7) that meshes with the first gear (6) is provided at one end of the rotating shaft (2) close to the driving motor (5); A box body (8) is provided on the displacement device (1), and the driving motor (5) is arranged in the box body (8); a shaft hole concentric with its axis is provided in the rotating shaft (2), a sleeve (9) connected to the box body (8) is provided at the shaft hole, a connecting rod (10) is provided in the sleeve (9), a synchronous belt (11) for driving the connecting rod (10) to rotate is provided between the connecting rod (10) and the driving motor (5), a housing (12) is provided at one end of the sleeve (9) away from the driving motor (5), a first bevel gear (13) is provided at one end of the connecting rod (10) in the housing (12), a second bevel gear (14) that meshes with the first bevel gear (13) is provided in the housing (12), and a propeller (15) extending outside the housing (12) is provided on the second bevel gear (14), and the propeller (15) provides power to one end of the rotating shaft (2) away from the driving motor (5) when rotating so that the rotating shaft (2) remains vertical in the water; An electric push rod (16) is provided on the box body (8), a ring (17) connected to the electric push rod (16) is sleeved on the rotating shaft (2), a number of racks (18) are provided on one side of the ring (17) away from the box body (8), and a toothed ring (19) corresponding to and meshing with the rack (18) is provided on the connecting rod (3), and the rack (18) is used to drive the connecting rod (3) to rotate; Collect the plankton with the fishing net (4), and analyze the plankton to evaluate the impact of herbicides on marine biodiversity.

2. The investigation and sampling device for evaluating the impact of herbicides on marine biodiversity according to claim 1, characterized in that, The displacement device (1) is an engine boat or a remotely controlled electric boat.

3. The investigation and sampling device for evaluating the impact of herbicides on marine biodiversity according to claim 1, characterized in that, The tooth number ratio of the second gear (7) and the first gear (6) is greater than 10.

4. The investigation and sampling device for evaluating the impact of herbicides on marine biodiversity according to claim 1, characterized in that, The fishing net (4) is cylindrical, and magnetic strips with opposite magnetic poles are respectively provided at both ends of the fishing net (4).

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