River water environment sample collection system

Abstract

The invention discloses a river water environment sample collection system, and belongs to the technical field of sampling, the river water environment sample collection system comprises a first pipe body, the side surface of the end part of the first pipe body is connected with a first netting gear through a first connecting piece, the two ends of the first pipe body are through and allow a rope body to pass through, and the bottom of the first pipe body is provided with a bracket; the support is connected with the rope body capable of passing through the first pipe body through the first rope body, and a sampling container is arranged in the support. The device realizes synchronous and efficient collection of phytoplankton, zooplankton and water samples of different water layers, solves the problem of sampling in a complex river environment, can ensure a stable posture in torrential water flow, avoids bottom hanging and water sample pollution, improves the sampling operation convenience and data consistency, is adaptive to diversified sampling scenes of the river environment, and improves the sampling efficiency. The use cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sampling, in particular to a river water environment sample collection system. BACKGROUND

[0002] The collection of river water environment samples (including phytoplankton, zooplankton and representative water samples) is a prerequisite for water environment quality monitoring, aquatic ecosystem assessment and pollution tracing analysis. The sampling accuracy, efficiency and sample purity directly determine the reliability of subsequent detection data and the scientificity of analysis conclusions. With the development of water environment monitoring technology, various sample collection devices have emerged, for example, patent KR102816921B1 discloses a phytoplankton collection device, which realizes sample volume control and collection through a container, a volume setting unit and a suction part. However, this device is mainly suitable for static or slow-flowing water bodies, and its applicability in rivers is limited. Patent IN202311035610A proposes an automatic water sample collection and phytoplankton filtering device, which realizes phytoplankton separation through a double-chamber structure combined with mesh nets of different mesh sizes. This device has high automation, but its use cost is relatively high.

[0003] In addition to the above-mentioned patent technologies, current river water environment sample collection mainly relies on traditional manual collection tools and some automatic devices. In some river basins with turbulent river flow and complex river bottom topography (such as silt and gravel accumulation), existing equipment is prone to tilting, overturning or scraping the bottom mud, which leads to the mixing of impurities in the water sample, affecting the detection accuracy and making it difficult to remove the equipment after it is stuck to the bottom. Moreover, the size of phytoplankton and zooplankton varies greatly, and different mesh sizes of mesh nets are needed for collection. Existing equipment often needs to replace the mesh nets separately to complete the qualitative collection of the two types of organisms, which is tedious and time-consuming. In complex river environments, tedious operations can affect sampling efficiency and increase sampling costs. Therefore, existing equipment generally remains applicable to shore shallow water operations and cannot meet the sampling needs of ships in deep water areas, nor can it meet the adaptation ability to diverse sampling scenarios in complex river environments. SUMMARY

[0004] The present application aims to provide a river water environment sample collection system that realizes the synchronous and efficient collection of phytoplankton, zooplankton and water samples from different water layers, solves the problem of sampling in complex river environments, ensures stable posture in turbulent water flow, avoids sticking to the bottom and water sample pollution, improves the convenience of sampling operation and data consistency, adapts to diverse sampling scenarios in river environments, and reduces the use cost.

[0005] To solve the above technical problems, the present application specifically provides the following technical solutions: a river water environment sample collection system, comprising a first pipe body, a first net connected to the side of the end of the first pipe body through a first connecting piece, the first pipe body being through at both ends and allowing a rope to pass through, a support being arranged at the bottom of the first pipe body, the support being connected to the rope that can pass through the first pipe body through a first rope, and a sampling container being arranged in the support. The first pipe body is through at both ends and allows the rope to pass through, the first net is connected to the side of the end of the first pipe body through the first connecting piece, and the support with the sampling container arranged therein is connected through the first rope, so that different planktons can be collected synchronously without frequent replacement of the net, the depth is controlled by adjusting the position of the first pipe body and the support through the rope, the sampling container is fixed on the support, and the problems of the conventional river water environment sample collection, such as frequent replacement of the net, difficulty in accurately controlling the sampling depth, and instability of the sampling container, are solved.

[0006] According to an embodiment of the present application, the second net is connected to the side of the first pipe body through the first connecting piece, and the horizontal height of the second net is consistent with or different from that of the first net. The second net is connected to the side of the first pipe body through the first connecting piece, and the horizontal height of the second net is designed to be consistent with or different from that of the first net, so that the same height is selected to expand the collection range of the same layer, or the different heights are selected to synchronously collect different layers, the net does not need to be disassembled and assembled multiple times, the sample is synchronously stored in the sampling container arranged in the support, the operation is simplified and the efficiency is improved, the plankton samples of the same layer and multiple regions or different water layers can be synchronously obtained, the representativeness of the sample is enhanced, and the problem of inconvenient height adjustment of the conventional equipment is solved.

[0007] According to an embodiment of the present application, the second net and the first net have an included angle. The second net connected to the side of the first pipe body through the first connecting piece has an included angle with the first net, and the rope adjustment function of the first pipe body and the stable support of the support are combined, so that the collection coverage range in the water flow direction is expanded and the capture blind area is reduced when sampling in the same layer, especially in the complex river basin, the conventional net is usually a single net, and the net may have overlapping collection range or water flow direction blind area when facing complex fluid, so that the plankton is not fully captured, the present application synchronously captures plankton in different flow directions without multiple adjustments of the net, enhances the representativeness of the sample in the same layer, and solves the problem of incomplete capture caused by the lack of included angle of the conventional net.

[0008] According to an embodiment of the present application, the sampling container comprises a container body, the inside of the container body is separated into a first containing chamber and a second containing chamber by a partition plate, a valve is arranged on the partition plate, and an electric control valve is arranged on the container body at the side of the first containing chamber and the second containing chamber. The electric control valve is an electric control gate valve, and the valve on the partition plate is an electric control ball valve, which is used to realize the medium flow between the first containing chamber and the second containing chamber. The container body of the sampling container of the present application is separated into the first containing chamber and the second containing chamber by the partition plate, which is different from the single-chamber sampling device in the prior art. The sampling container of the present application can collect water samples at different water layer depths, water samples in different time periods, and the like, and the partition plate of the container is provided with a valve, and the container bodies at the sides of the two chambers are both provided with electric control valves. Through the cooperation of the first pipe body, the synchronous collection of the first net and the second net, and the support of the support, the sampling container can realize the synchronous storage of different plankton concentrated samples or water layer water samples. In the subsequent water sample in-out and mixing operations, the electric control valve can be used to realize the operation, and the pollution risk caused by manual operation can be avoided.

[0009] According to an embodiment of the present application, the container body is provided with a detachable cover plate at the upper end and the lower end, at least one end cover plate is provided with a valve, and the end of the container body provided with the valve can be sleeved with a third net. The third net is used to filter the water sample. Specifically, when the zooplankton is quantitatively collected, 10 L of surface water (20 L of middle layer and bottom layer) is collected, the valve inside the container body and the valve on the bottom cover plate are opened, the water sample passes through the third net, a concentrated liquid is obtained, and the concentrated liquid is put into a 50 ml white square bottle. In this way, the subsequent filtering requirement is met, and the sample does not need to be transferred but directly filtered and concentrated on the basis of the sampling container. In addition, the cover plate of the present application can be detachably arranged to facilitate subsequent cleaning and disinfection work.

[0010] According to an embodiment of the present application, the support comprises first frame bodies arranged at an interval between the upper and lower ends, the first frame bodies are connected through first rod bodies, and a fixing sleeve is sleeved outside the sampling container and abuts against the first rod bodies. The fixing sleeve can be adapted to container bodies of different sizes, the first frame bodies and the first rod bodies provide stable support to avoid container shaking and leakage, frequent adjustment of the fixing structure is not needed, and the fixing structure is convenient to disassemble and assemble. When the fixing structure is disassembled, the container body can be directly pulled out, and the fixing sleeve can be pulled out from the gap between the two first rod bodies after being tilted.

[0011] According to an embodiment of the present application, the first frame body at the bottom of the support is provided with a bottom plate which can contact or separate from the sampling container. When the bottom plate contacts the sampling container, the bottom plate can support the sampling container, so that the sampling container is prevented from touching the bottom and being contaminated by mud, and when the bottom plate separates from the sampling container, the sampling container can be quickly taken out or put in.

[0012] According to one embodiment of the present invention, the fixing sleeve is a ring structure with first slots spaced apart on its surface. Elastic elements are filled in a plurality of first slots. The elastic elements can deform with the size of the container, thus being compatible with container bodies of different diameters. This solves the problem of poor adaptability of traditional rigid rings. In addition, the flexible clamping force generated when the elastic elements are attached to the outer wall of the container body can avoid hard contact and scratching of the container, as well as compensate for dimensional deviations and prevent the container from shaking under the impact of water flow. This achieves enhanced fixing stability and convenience of subsequent assembly and disassembly of the sampling container through the ring and elastic elements.

[0013] According to one embodiment of the present invention, a float plate that can slide relative to the outside of the first tube is provided. By providing a float plate that can slide relative to the outside of the first tube, the buoyancy position can be flexibly adjusted along the first tube. Combined with the rope adjustment function of the first tube and the stable support of the bracket, it can adapt to the buoyancy requirements of different water depths, avoid equipment tilting, and ensure that the first net and the second net accurately collect samples at the target depth.

[0014] According to one embodiment of the present invention, the first tube body is covered with a rubber sleeve. The rubber sleeve increases grip friction. In river environments, hands are often wet when collecting water samples, which can easily lead to slippage or inaccurate control of rotation during subsequent sampling operations. The present invention solves the slippage problem with wet hands by adding a rubber sleeve and ensures that the collector can accurately control the rotation speed of the first tube body, thus guaranteeing the sampling efficiency of the first / second net.

[0015] According to one embodiment of the present invention, the sampling container includes a container body with a scale for displaying the amount of water taken. The container body is made of a light-transmitting material, so there is no need to open the lid to check the amount of water or rely on experience to measure the amount, which would lead to insufficient accuracy.

[0016] Compared with existing technologies, the beneficial effects of the present invention are as follows: The present invention achieves simultaneous and efficient collection of phytoplankton, zooplankton and water samples from different water layers, while ensuring the stable posture of the equipment in turbulent water flow and complex underwater topography, avoiding bottom snagging and water sample contamination, improving the convenience of sampling operation and data consistency, adapting to diverse sampling scenarios in river environments, reducing usage costs, and meeting the needs of water environment quality monitoring, high efficiency and multi-type sample collection. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1This is a schematic diagram of a river water environment sample collection system according to the present invention; Figure 2 This is a schematic diagram of the connection scheme between the support and the counterweight assembly of the present invention; Figure 3 This is a schematic diagram of the support structure of the present invention; Figure 4 This is a schematic diagram of the sampling container scheme of the present invention; Figure 5 This is a schematic diagram of the sampling container installation scheme of the present invention with a third net. Figure 6 This is a schematic diagram of the fastener design of the present invention; Figure 7 This is a schematic diagram of the counterweight component scheme of the present invention; Figure 8 This is a schematic diagram of the support, sampling container, and flow guiding component of the present invention; Figure 9 This is a schematic diagram of the installation scheme of the sampling container and flow guiding component of the present invention; Figure 10 This is a schematic diagram of the support ring and bending rod of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 10. First pipe body; 12. Rubber sleeve; 11. Float; 13. First connector; 14. First net; 15. Second net; 20. First rope; 30. Support; 31. First frame; 32. Bend plate; 33. First rod; 34. Fixing sleeve; 341. First slot; 35. Bottom plate; 40. Sampling container; 41. Container body; 42. First receiving cavity; 43. Second receiving cavity; 44. Cover plate; 45. Electrically controlled valve; 46. Third net; 50. Counterweight assembly; 51. Counterweight ring; 52. Flexible support rod; 53. Inlet opening; 54. Plate; 55. Second slot; 60. Flow guiding assembly; 61. Connecting ring; 62. Flow guide vane; 70. Support ring; 71. Bending rod; 72. Flexible strip. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The concepts involved in this application will first be described with reference to the accompanying drawings. It should be noted that the following descriptions of various concepts are only for the purpose of making the content of this application easier to understand and do not constitute a limitation on the scope of protection of this application; furthermore, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Example 1: As shown in the attached figure Figure 1 -Appendix Figure 6 As shown, a river water environment sample collection system includes a first tube 10. A first net 14 is connected to the side of the first tube 10 via a first connector 13. The first tube 10 is open at both ends, allowing a rope to pass through. A support 30 is located at the bottom of the first tube 10. The support 30 is connected to a rope 20 that allows passage through the first tube 10. A sampling container 40 is built into the support 30. This invention, through a first tube 10 open at both ends, allowing a rope to pass through, with its side connected to the first net 14 via the first connector 13, and the support 30 containing the sampling container 40 connected via the first rope 20, allows for simultaneous collection of different planktonic organisms without frequent net changes. The depth is controlled by adjusting the position of the first tube 10 and the support 30 via the rope. The support 30 fixes the sampling container 40, solving the problems of frequent net changes, difficulty in accurately controlling sampling depth, and unstable sampling container fixation in traditional river water environment sample collection methods.

[0023] The first net 14 and the second net 15 can be used for qualitative collection of phytoplankton and zooplankton. For example, in this example, the first net 14 is used for qualitative collection of phytoplankton. The first net 14 is rotated at a speed of 20cm / s to 30cm / s for 1 to 3 minutes at a depth of 0.5 m to obtain a concentrated sample, which is then placed in a 50 ml white sampling bottle. The first net 14 can be a No. 25 planktonic net.

[0024] For example, the second net 15 is used for qualitative collection of zooplankton. The second net 15 rotates at a speed of 20-30 cm / s for 1-3 minutes at a depth of 0.5 m to obtain a concentrated sample, which is then placed in a 50 ml white sampling bottle. In this setup, the collector needs to rotate the first tube 10 to rotate the plankton net for collection. If collecting large zooplankton, a No. 13 plankton net is required, while a No. 25 plankton net can be used for the second net 15.

[0025] Plankton net No. 25 has a mesh size of 200 and a sieve opening diameter of 0.064 mm; plankton net No. 13 has a mesh size of 125 and a sieve opening diameter of 0.112 mm.

[0026] The first tube 10 is connected to a second net 15 via a first connector 13 on its side. The second net 15 may be at the same or different horizontal height as the first net 14. This invention connects the second net 15 to the first tube 10 via the first connector 13, and the second net 15 is designed to be at the same or different horizontal height as the first net 14. Combined with the rope adjustment function of the first tube 10 and the stable support of the bracket 30, the same height can be selected to expand the collection range of the same layer, or different heights can be collected synchronously in layers. There is no need to disassemble and assemble the net multiple times. Combined with the sampling container 40 built into the bracket 30 to store samples synchronously, the operation is simplified and the efficiency is improved. At the same time, it can simultaneously obtain planktonic samples from multiple areas of the same layer or different water layers, enhance the representativeness of the samples, and solve the problem of inconvenient height adjustment of traditional equipment.

[0027] The second net 15 and the first net 14 are at an angle. In this invention, the second net 15 and the first net 14, connected by the first connector 13 via the side of the first tube 10, are at an angle. Combined with the rope adjustment function of the first tube 10 and the stable support of the bracket 30, this allows for expanding the sampling coverage in the direction of water flow and reducing blind spots during same-layer sampling. Especially in complex river basins, traditional nets are often single nets, which may result in overlapping sampling areas or blind spots in the direction of water flow when facing complex fluids, leading to incomplete capture of plankton. The technology provided by this invention allows for simultaneous capture of plankton in different flow directions without multiple net adjustments and enhances the representativeness of samples in the same layer, solving the problem of incomplete capture caused by the lack of an angle in traditional nets.

[0028] The sampling container 40 includes a container body 41, which is internally divided into a first receiving chamber 42 and a second receiving chamber 43 by a partition. Valves are provided on the partition, and electrically controlled valves 45 are installed on the sides of the container body 41 of both the first and second receiving chambers 42 and 43. The electrically controlled valves 45 are electrically controlled gate valves, and the valves on the partition are electrically controlled ball valves, used to allow media flow between the receiving chambers 42 and 43. The sampling container 40 of the present invention has its container body 41 divided into a first receiving chamber 42 and a second receiving chamber 43 by a partition. This is different from the existing single-chamber sampling devices. The sampling container of the present invention can collect water samples at different water depths and at different time periods. Furthermore, the partition of the single chamber is equipped with a valve, and both sides of the container body 41 are equipped with electrically controlled valves 45. By cooperating with the first tube 10 to control the depth, the first net 14 and the second net 15 to collect samples simultaneously, and the support of the bracket 30, it is possible to simultaneously store concentrated samples of different planktonic organisms or water samples from different water layers. Subsequent operations such as water sample entry and exit and mixing can be achieved through the electrically controlled valves, and the risk of contamination caused by manual operation can be avoided.

[0029] The container body 41 has openings at both the top and bottom and is equipped with detachable cover plates 44. At least one cover plate 44 has a valve, and the end of the container body 41 with the valve can be fitted with a third net 46. Water sample filtration is achieved through the third net 46. Specifically, during quantitative collection of zooplankton, 10 L of surface water is collected (20 L from the middle and bottom layers). The valve inside the container body 41 and the valve on the bottom cover plate 44 are opened, and the water sample passes through the third net 46 to obtain a concentrated solution, which is then placed in a 50 ml white square bottle. This achieves the adaptation to subsequent filtration needs without transferring the sample, but directly filtration and concentration on the basis of the sampling container 40. In addition, the detachable cover plate 44 of this invention facilitates subsequent cleaning and disinfection.

[0030] The support 30 includes first frame bodies 31 spaced vertically, connected by first rods 33. A fixing sleeve 34 is fitted over the sampling container 40, abutting against the first rods 33. The fixing sleeve 34 can accommodate container bodies 41 of different sizes. The first frame bodies 31 and first rods 33 provide stable support, preventing the container from shaking and leaking. It eliminates the need for frequent adjustments to the fixing structure and is easy to assemble and disassemble. During disassembly, it can be directly pulled out of the container body 41, while the fixing sleeve 34 can be tilted and pulled out through the gap between the two first rods 33.

[0031] The first frame 31 at the bottom of the support 30 has a base plate 35 that can contact or separate from the sampling container 40. By providing a base plate 35 on the first frame 31 at the bottom of the support 30 that can contact or separate from the sampling container 40, the sampling container 40 can be supported when in contact, thus preventing it from touching the bottom and getting mud on it, and the container can be easily and quickly picked up and put away when separated.

[0032] The fixing sleeve 34 is a ring structure with first slots 341 spaced apart on its surface. Elastic elements are filled in several first slots 341. The elastic elements can deform with the size of the container, so it can be compatible with container bodies 41 of different diameters. This solves the problem of poor adaptability of traditional rigid rings. In addition, the flexible clamping force generated when the elastic elements are attached to the outer wall of the container body 41 can avoid hard contact and scratching of the container, as well as compensate for size deviations and prevent the container from shaking under the impact of water flow. The ring and elastic elements enhance the fixing stability and facilitate the subsequent assembly and disassembly of the sampling container 40.

[0033] The first tube 10 is fitted with a float 11 that can slide relative to it. By fitting the float 11 that can slide relative to it, the buoyancy position can be flexibly adjusted along the first tube 10. Combined with the rope adjustment function of the first tube 10 and the stable support of the bracket 30, it can adapt to the buoyancy requirements of different water depths, avoid equipment tilting, and ensure that the first net 14 and the second net 15 accurately collect samples at the target depth.

[0034] The first tube body 10 is covered with a rubber sleeve 12. The rubber sleeve 12 increases the grip friction. When collecting water samples in river environments, hands are usually wet, which can easily lead to slippage or inaccurate control of rotation during subsequent collection operations. This invention solves the problem of slippage when hands are wet by adding a rubber sleeve 12, and ensures that the collector can accurately control the rotation speed of the first tube body 10, thus ensuring the collection efficiency of the first net 14 / second net 15.

[0035] The sampling container 40 includes a container body 41, which has a scale to display the amount of water taken. The container body 41 is made of a light-transmitting material, so there is no need to open the lid to check the amount of water or rely on experience to take the amount, which would lead to insufficient accuracy.

[0036] The river water environment sample collection system of the present invention is mainly operated on ships, but can also be operated on shore. The depth of the collection area is determined by the depth of the river where the sample is collected, as shown in Table 1.

[0037] Table 1

[0038] Example 2: In this embodiment, see Appendix Figure 1 Appendix Figure 2 Appendix Figure 7 As shown, the bottom of the support 30 has a counterweight assembly 50, which includes a counterweight ring 51. The counterweight ring 51 is a ring structure with a hollow interior. The upper part of the counterweight ring 51 has multiple inlet openings 53 that communicate with its hollow interior. Multiple plates 54 are filled in the hollow interior of the counterweight ring 51. The plates 54 are counterweight plates. The counterweight ring 51 has a second slot 55 to allow it to deform. The counterweight ring 51 is connected to the first frame 31 at the bottom of the support 30 through multiple flexible support rods 52 arranged in a ring.

[0039] A counterweight assembly 50 is installed at the bottom of the support 30. The counterweight ring 51 has a hollow structure. The filler plate 54 can adjust the counterweight to adapt to the water depth. When the counterweight ring 51 touches the bottom and encounters obstacles such as gravel or rock crevices, the second slot 55 can cause the ring to contract or expand, avoiding rigid jamming and facilitating detachment from obstacles. This solves the problem of traditional counterweights getting stuck at the bottom and difficult to retrieve, ensuring that the support 30 can stably retrieve the sampling container 40 and the first net 14 / second net 15. Furthermore, the deformation capability of the counterweight ring 51 allows it to conform to the uneven terrain of the bottom, increasing the contact area with the bottom. Combined with the buffer of the flexible support rod 52, it reduces the tilting of the support 30 caused by water flow impact. When the counterweight ring 51 deforms, it can buffer the impact force of the bottom collision, preventing damage to the counterweight ring 51 or the first frame 31 at the bottom of the support 30 when the rigid counterweight collides with hard objects, and reducing or minimizing the impact of bottom sludge resuspension on water sample collection.

[0040] In addition, the inlet opening 53 of the counterweight ring 51 allows water to enter and exit the hollow part of the ring body through the inlet opening 53, reducing the lateral impact force of the water flow on the ring body. In particular, during the process of the equipment entering the water, it avoids the traditional solid counterweight causing the support 30 to drive the equipment to shift laterally due to the large water flow resistance. In addition, after the water flows into the hollow part, it can balance the force on the ring body. With the buoyancy adjustment of the float plate 11, it further prevents the equipment from overturning. This ensures that the equipment can still sample stably and efficiently in turbulent water flow and complex underwater environments.

[0041] In this embodiment, the specific weight of the counterweight component 50 needs to be adjusted according to the contents of Table 1 in Embodiment 1 and the water flow parameters of the sampling target area.

[0042] Example 3: In this embodiment, see Appendix Figure 8 Appendix Figure 9 As shown, the sampling container 40 installed inside the bracket 30 is fitted with a flow guiding component 60. The flow guiding component 60 includes two connecting rings 61 that are fitted onto the outside of the container body 41. Inclined flow guiding blades 61 are arranged around the outside of the container body 41. The upper and lower ends of the flow guiding blades 61 are connected to the connecting rings 61 located in the vertical direction of the container body 41, respectively. There is a gap between the flow guiding blades 61 and the container body 41. In traditional river water sampling, the container body 41 of the sampling container 40 is directly exposed to the water flow, making it susceptible to direct impact from turbulent water flow, which can cause the support 30 to sway. This can lead to container displacement, disturbance and cross-flow of water samples in the first and second receiving chambers 42 and 43, and the high water flow resistance may pull the container away from the sampling depth. In this invention, a flow guiding component 60 is fitted outside the sampling container 40 inside the support 30. The container body 41 is fixed by two connecting rings 61, and inclined flow guiding blades 61 are arranged around it with a gap between the blades and the container. The connecting rings 61 ensure that the angle of the flow guiding blades 61 is stable. The inclined blades can guide the water flow along the inclined surface and avoid direct impact on the container. The gap allows the water flow to pass smoothly and reduces resistance. This not only prevents the support 30 from swaying and ensures the stability of the container, but also avoids cross-flow of water samples in the chambers, and reduces water flow resistance. This works in conjunction with the first tube 10 to control the depth and the counterweight component 50 to stabilize the posture.

[0043] Example 4: See appendix Figure 10 As shown, the first net 14 and / or the second net 15 are provided with a support ring 70 inside the net sleeve. The support ring 70 is tied to the first net 14 and / or the second net 15 with rope. On the rear side of the support ring 70, i.e., in the direction towards the inside of the first net 14 and / or the second net 15, there is a bending rod 71 connected to the support ring 70. The bending rod 71 can contact the net of the first net 14 and / or the second net 15 to keep the first net 14 and / or the second net 15 in an open state. Multiple flexible strips 72 are provided on the bending rod 71.

[0044] When traditional first net 14 and second net 15 are used for sampling, the net is easily folded due to water flow impact or rotation of the first tube 10 during sampling (20cm / s~30cm / s), resulting in blockage of the plankton capture channel and insufficient collection. In addition, the support structure is mostly rigid and fixed, which is inconvenient to disassemble and is easy to scratch the net. The present invention provides a support ring 70 inside the net sleeve of the first net 14 and / or the second net 15. The support ring 70 is connected to a bending rod 71 on the rear side, which is forced to keep the net open. The bending rod 71 has a flexible strip 72, which ensures that the net is always open, expands the water flow contact area, improves the plankton capture efficiency, and prevents the rigid structure from scratching the net, thus extending the life of the net.

[0045] Example 5: In this embodiment, the first frame 31 is a triangular frame structure, and its inner surface has a curved plate 32 that can abut against the outer wall of the container body 41 of the sampling container 40.

[0046] The first frame 31 structure of the present invention is not limited to a triangular frame structure, but can also be a polygonal frame structure such as a rectangular frame, or a circular frame structure, or an elliptical frame structure.

[0047] Traditional river water environment sampling brackets have a simple frame structure, making it difficult to adapt to sampling containers 40 of different shapes. When supporting the container body 41, instability is easily caused by poor fit, or the lack of a buffer structure can scratch the container, requiring frequent bracket replacement. This invention sets the first frame 31 of the bracket 30 as a triangular frame structure, with a curved plate 32 on the inner surface of the frame that can abut against the outer wall of the container body 41. The curved plate 32 adapts to the curved surface of the container body 41 through its arc structure, thereby increasing the contact area and dispersing the fixing pressure, solving the problem of easy shaking caused by traditional flat fit. This ensures that the container is stably positioned within the bracket 30, avoiding water flow impact or displacement during operation. Moreover, the curved plate 32 can reduce hard scratches on the container body 41 through flexible abutment, protecting its light transmittance and scale clarity. Furthermore, the curved plate 32 is compatible with container bodies 41 of different diameters through its arc adaptability, allowing for the fixing of various specifications of sampling containers 40 without replacing the first frame 31, thus improving the adaptability of the bracket 30 and solving the problems of poor fit between traditional brackets and containers and easy damage to containers.

[0048] The first frame 31 can also be set as a rectangular or circular frame, which is connected to the first rod 33 and positioned by the fixing sleeve 34. The triangular frame ensures the stability of the support, and the bent plate 32 enhances the fit with the container body 41 and prevents scratches. Multiple frame types are suitable for containers of different shapes, and there is no need to replace the bracket.

[0049] It should also be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0050] The embodiments and / or implementation methods described above are merely preferred embodiments and / or implementation methods for implementing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any way. Any person skilled in the art can make some modifications or alterations to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as the technology or embodiments that are substantially the same as the present invention.

[0051] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A river water environment sample collection system, comprising a first tube (10), wherein a first net (14) is connected to the side of the end of the first tube (10) via a first connector (13), characterized in that, The first tube (10) is open at both ends and allows the rope to pass through. The bottom of the first tube (10) is provided with a bracket (30). The bracket (30) is connected to the rope that can pass through the first tube (10) through the first rope (20). The bracket (30) has a built-in sampling container (40).

2. The river water environment sample collection system according to claim 1, characterized in that, The first pipe body (10) is connected to a second net (15) via a first connector (13) on its side. The second net (15) may be at the same or different horizontal height as the first net (14). Preferably, the second net (15) and the first net (14) have an angle between them.

3. The river water environment sample collection system according to claim 1, characterized in that, The sampling container (40) includes a container body (41), which is divided into a first receiving chamber (42) and a second receiving chamber (43) by a partition. The partition is provided with a valve, and an electrically controlled valve (45) is provided on the container body (41) on the side of the first receiving chamber (42) and the second receiving chamber (43).

4. The river water environment sample collection system according to claim 3, characterized in that, The container body (41) has openings at the upper and lower ends and is provided with detachable cover plates (44). At least one end of the cover plate (44) is provided with a valve, and the end of the container body (41) with the valve can be fitted with a third net (46).

5. A river water environment sample collection system according to claim 1, characterized in that, The support (30) includes a first frame (31) spaced apart vertically, the first frame (31) being connected by a first rod (33), and a fixing sleeve (34) is fitted around the outside of the sampling container (40), the fixing sleeve (34) abutting against the first rod (33).

6. The river water environment sample collection system according to claim 5, characterized in that, The first frame (31) at the bottom of the support (30) has a base plate (35) that can contact or separate from the sampling container (40).

7. A river water environment sample collection system according to claim 5, characterized in that, The fixing sleeve (34) is a ring structure, and its surface is provided with first slots (341) spaced apart, and a plurality of the first slots (341) are filled with elastic elements.

8. A river water environment sample collection system according to claim 1, characterized in that, The first tube (10) is fitted with a float (11) that can slide relative to it.

9. A river water environment sample collection system according to claim 1, characterized in that, The first tube (10) is covered with a rubber sleeve (12).

10. A river water environment sample collection system according to claim 1, characterized in that, The sampling container (40) includes a container body (41), which has a scale for displaying the amount of water taken, and the container body (41) is made of a light-transmitting material.

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