A benthic attached algae collection and concentration device

Abstract

The present invention discloses a benthic epiphytic algae collection and concentration device, belonging to the technical field of ecological environment monitoring, which includes a main floating body, a plurality of collection nets and a counterweight block that are connected to each other. The collection nets are arranged at intervals up and down between the main floating body and the counterweight block. A secondary floating body is floatingly connected above any one of the collection nets. The collection net includes a first rubber ring and a second rubber ring fixed to its inner side. A fixing ring is provided at the upper end of the collection net, and the fixing ring fixes the stone and is rotatably connected to the collection net. A connecting rope is provided between adjacent collection nets, and a cleaning component is slidably connected to the connecting rope. The present invention can achieve accurate and stable collection of underwater epiphytic organisms, and has the convenience of operation, improving the collection efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of ecological environment monitoring, and particularly relates to a benthic epiphytic algae collection and concentration device. Background Art

[0002] Epiphytic algae, as the main primary producers in the water ecosystem and an important part of the food chain, can transfer inorganic nutrient elements to higher-level organic life forms, and play an important role in material cycling and energy flow. They are mainly attached to substrates such as stones, aquatic plants, sediments, sand grains, and aquatic animals. They are sensitive to external disturbances and can, to some extent, reflect the water quality of the water area. Epiphytic algae are one of the important indicators for evaluating the ecological environment of the water area.

[0003] Currently, the collection of epiphytic algae mainly involves brushing the algae living on substrates such as stones, wood, or plants into a sample bottle with tools such as a toothbrush, and then fixing them with a formaldehyde solution. However, such collection methods and devices cannot accurately measure the sampling area of epiphytic algae, nor can they concentrate the sample to a fixed volume. It is difficult to quickly and accurately collect samples during the operation. Moreover, there are undercurrents in some water areas, which easily cause non-algal substances and other organisms to attach to the part of the device that enters the water, reducing the collection accuracy and increasing the risk of the recovery personnel falling into the water.

[0004] The US patent with the application number US13330355 discloses an algae collection device. The device includes a filtration system. The filtration system includes a first fluid channel and a second fluid channel. The first fluid channel includes a permeate channel for guiding fluid through, and the second fluid passage includes a reject passage. The reject passage bypasses the filter. The filtration system includes a piston system for pushing fluid through the filter. This invention can achieve the shunt filtration and collection of algae, solve the serious dilution problem of algae caused when water flow removes algae from the sieve, and scrape and collect algae through the action of the piston on water and air, improving the collection efficiency. However, this invention cannot achieve the centralized sampling of epiphytic algae in water, and it is easy to reduce the accuracy due to the concentration problem during sampling, and at the same time, the collection amount cannot be measured. Summary of the Invention

[0005] The purpose of the present invention is to provide a benthic epiphytic algae collection and concentration device that is easy to operate and integrates collection, cleaning, and concentration.

[0006] The technical solution adopted by the present invention to achieve the above purpose is as follows:

[0007] A benthic epiphytic algae collection and concentration device, comprising: a main floating body and a collection net arranged at intervals up and down. The upper end of the collection net is open and fixed with a stone. A secondary floating body is connected above any one of the collection nets. A main rope body is fixed between the top secondary floating body and the main floating body. A connecting rope is fixed at the bottom of any one of the collection nets, and a counterweight is fixed at the lower end of the connecting rope at the bottom. The main floating body floats on the water surface, the counterweight provides the gravity for the device to sink, the collection net is stably suspended underwater through the secondary floating body, and the epiphytic algae can attach to the fixed stone through the collection net. Moreover, the collection net blocks external organisms to reduce the possibility of the epiphytic algae falling off. The serially arranged collection nets improve the collection range at multiple depths, expand the collection efficiency, and at the same time, achieve the acquisition of multi-depth data in the same water area in one collection, so as to form a control group to improve the accuracy of data calculation.

[0008] Preferably, a first rubber ring and a second rubber ring are arranged at intervals up and down inside the collection net. The outer edges of the first rubber ring and the second rubber ring are both fixed to the inner side of the collection net body. A plurality of elastic ropes are fixed between the first rubber ring and the second rubber ring, and the elastic ropes are connected with floating balls. The first rubber ring and the second rubber ring realize the internal support of the collection net, keep the expanded shape of the collection net, avoid the collection net winding itself and losing the collection function, and at the same time, avoid the transverse contraction of the collection net and the friction fracture with the fixed stone. When the underwater undercurrent fluctuates, the first rubber ring and the second rubber ring can approach each other through the elastic ropes and the floating balls, thereby driving the flexible collection net to longitudinally contract in the water, reducing the shaking of the collection net by reducing the contact area between the net body and the water flow, avoiding the device leaving the target water area for collection, improving the collection accuracy, and also avoiding the over-tension fracture of each connecting rope body.

[0009] Preferably, a first rubber strip is arranged around the inner side of the first rubber ring, and a second rubber strip is arranged around the inner side of the second rubber ring. The first rubber strip and the second rubber strip are arranged in a staggered manner in projection. The first rubber strip and the second rubber strip form two upper and lower blocking surfaces inside the collection net. On the one hand, they can collect the fallen epiphytic algae, and on the other hand, they block the organisms moving upward from the bottom of the collection net, reducing the probability of the epiphytic algae being eaten and falling off. The first rubber strip and the second rubber strip filter the epiphytic algae floating up from the bottom through the adjacent gaps, block the sediment and gravel, and avoid the blockage of the collection net. When the bottom undercurrent surges upward, the first rubber strip and the second rubber strip buffer the water flow through swinging deformation, reducing the probability of the bottom undercurrent impacting the stone and causing the epiphytic algae to fall off, ensuring the collection efficiency. The first rubber strip and the second rubber strip respectively increase the weight at the centers of the first rubber strip and the second rubber ring, which helps the first rubber strip and the second rubber ring to maintain a vertical posture and suspend or expand axially, reducing the probability of the stone shaking horizontally and improving the collection effect.

[0010] Preferably, a connecting ring is fixed at the upper end of the collection net, and the connecting ring is symmetrically provided with circular holes, a fixing ring for fixing the stone is coaxially arranged on the inner side of the connecting ring, a ring groove is provided on the inner side of the fixing ring, a handle is symmetrically fixed on the outer side of the fixing ring, the handle passes through the circular hole, the handle is rotatably connected relative to the circular hole, and a scale is provided on the upper end face of the fixing ring. The fixing ring is convenient for fixing the stone through the ring groove provided on the inner side thereof, after cleaning the upward side of the stone, the fixing ring is driven by the handle in the circular hole to turn the clean side of the stone downward, which is convenient for pollution-free operation of the stone, and the collecting net is thrown into the water with the stone, and the collecting net is taken out after the algae are attached, and the handle is turned so that the collecting side faces upward, and the sampling area is conveniently estimated through the scale, and after the estimation is completed, the stone is taken out, the algae are filtered and concentrated through the biological net and introduced into the sampling bottle.

[0011] Preferably, the connecting ring is coaxially fixed with a sleeve at the position of the circular hole, the sleeve is provided with a slide groove on the wall, the handle passes through the sleeve and is fixed with a limit post, and the limit post is cooperatively arranged in the slide groove. When the limit post rotates to the upper and lower travel ends in the slide groove, the upper end surface of the fixed ring is respectively facing upward, which is convenient for controlling the direction of the fixed ring when operating the handle. At the same time, the slide groove limits the rotation range of the handle, reduces the possibility of the handle rotating due to water flow disturbance, and avoids the probability of attached algae falling off due to repeated turning of the stone.

[0012] Preferably, a cleaning component is provided on the connecting rope, and the cleaning component includes a floating ring located on the outside of the connecting rope, a counterweight plate is fixed on the inside of the floating ring, a rotating shaft is arranged around the upper and lower end surfaces of the counterweight plate, and a ball is connected to the rotating shaft at the end, and the ball is arranged in contact with the connecting rope. The floating ring forms protection for the outside of the connecting rope, and when the floating ring drives the counterweight plate to slide on the connecting rope under the action of the water flow, the ball contacts the connecting rope and rotates, which is conducive to clearing the plants and attached organisms entangled on the connecting rope, reducing the possibility of damage and contamination of algae attached to the bottom during the floating process, improving the detection accuracy, and avoiding the connection rope, the main rope body and the auxiliary rope body from being broken due to excessive attached organisms. The counterweight plate reduces the shaking frequency of the connecting rope in the water by increasing the weight, improves the verticality of the overall underwater suspension of the device, and further improves the collection accuracy and ensures the collection volume.

[0013] Preferably, the counterweight sheet has an inner concave surface on its inner wall. The inner concave surface of the counterweight sheet forms a gap with the connecting rope. When the water passes through the gap, the fluid trajectory is changed, forming an accelerated water flow, which helps to remove the dirt remaining in the gap inside the counterweight sheet on the one hand, and accelerates the water flow to increase the sliding frequency of the floating ring on the connecting rope on the other hand, thereby improving the cleaning effect and driving away nearby organisms, thereby improving the collection stability.

[0014] Preferably, a protective plate is arranged around the middle part of the outer side wall of the floating ring. The protective plate includes diversion surfaces on the upper and lower sides. The diversion surfaces are concave spherical surfaces, and the concave direction is towards the outside of the middle part of the protective plate. The protective plate is provided with water-permeable holes in an array. When the lateral water flow contacts the protective plate, it drives the floating ring to rotate outside the connecting rope, thereby eliminating the impact of the lateral water flow. When the longitudinal water flow contacts the diversion surface, it is diverted, eliminating the impact of the longitudinal water flow, so that the collection net tends to be stable. When rotating, the water body quickly passes through the water-permeable holes to form bubbles, which helps to promote the floating and collection of algae. At the same time, the bursting of the bubbles around the collection net can remove the stones and stains stuck in the mesh holes, realizing cleaning.

[0015] Preferably, springs are arranged on the upper and lower end faces of the floating ring, and the springs are sleeved outside the connecting rope. The springs buffer the impact of the floating ring on the collection net above and the auxiliary floating body below through deformation, prevent the collection net and the auxiliary floating body from being damaged, and further improve the up-and-down swing frequency of the floating ring through deformation and reset, which helps the floating ring drive the protective plate to drive away the surrounding microorganisms.

[0016] Since the present invention adopts the collection nets arranged in series and the fixing rings for fixing the stones by flipping, the following beneficial effects are achieved: the collection nets are connected in series and suspended in water, improving the collection range; the first rubber ring and the second rubber ring form an inner support of the collection net to prevent the net body from being entangled, and can move relatively to contract the collection net, reducing the shaking of the net body caused by the impact of the water body to improve the collection stability; the first rubber strip and the second rubber strip can block the organisms and sediment floating from the bottom, avoid the shedding of algae and prevent the mesh holes from being blocked by sand and stones; the first rubber strip and the second rubber strip can buffer the upward undercurrent through deformation and swing, further reducing the probability of algae shedding; the fixing ring is rotatably arranged at the upper end of the collection net through a handle, facilitating the operation of the stone without pollution; the scale on the fixing ring is convenient for measuring the area of the collected algae for concentration calculation; the chute and the limit post arranged on the sleeve limit the rotation range of the handle, preventing the stone from turning underwater and causing the algae to fall off; the cleaning component drives the ball to clean the connecting rope through the up-and-down movement of the floating ring, preventing the attachment of organisms from affecting the collection of algae and also preventing the connecting rope from breaking due to excessive tensile force; the inner groove of the counterweight piece decelerates the passing water flow, improving the sliding frequency of the floating ring to improve the cleaning effect; the protective plate buffers the water flow to reduce the shaking to improve the collection stability; the protective plate can rotate under the impact of the water flow to drive the organisms closer, preventing the device from being damaged; the water-permeable holes form bubbles to promote the floating and collection of algae, and at the same time can clean the blockage of the mesh holes, ensuring the collection effect. Therefore, the present invention is a benthic epiphytic algae collection and concentration device that is easy to operate and integrates collection, cleaning, and concentration. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the connection of multiple collection nets and the main floating body;

[0018] Figure 2 It is a schematic diagram of the connection of the collection net and the auxiliary floating body;

[0019] Figure 3 It is a schematic diagram of a half-section of the collection net;

[0020] Figure 4 It is a schematic diagram of the connection between the first rubber ring and the second rubber ring;

[0021] Figure 5 It is a schematic diagram of the fixing ring;

[0022] Figure 6 It is a schematic diagram of the structure of the cleaning component;

[0023] Figure 7 It is a schematic diagram of a half-section of the cleaning component.

[0024] Reference numerals in the drawings: main floating body 1; main rope body 10; collection net 2; first rubber ring 21; second rubber ring 22; elastic rope 23; floating ball 24; first rubber strip 25; second rubber strip 26; auxiliary floating body 3; auxiliary rope body 30; connecting rope 4; counterweight 5; connecting ring 6; round hole 60; fixing ring 61; annular groove 62; handle 63; sleeve 64; chute 65; limiting column 66; cleaning component 7; floating ring 70; counterweight piece 71; rotating shaft 72; spherical ball 73; spring 74; concave surface 8; protective plate 9; water permeable hole 90. Specific embodiments

[0025] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments and the accompanying drawings:

[0026] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] See the attached Figure 1 - Attached Figure 2 , a benthic epiphytic algae collection and concentration device, comprising: a main floating body 1 and a collection net 2 arranged at intervals up and down. The upper end of the collection net 2 is open and fixed with a stone. An auxiliary floating body 3 is connected above any one of the collection nets 2. A main rope body 10 is fixed between the auxiliary floating body 3 at the top and the main floating body 1. A connecting rope 4 is fixed at the bottom of any one of the collection nets 2, and a counterweight 5 is fixed at the lower end of the connecting rope 4 at the bottom. The main floating body 1 floats on the water surface, and the counterweight 5 provides the gravity for the device to sink. The collection net 2 is stably suspended underwater through the auxiliary floating body 3. Epiphytic algae can attach to the fixed stone through the collection net 2, and the collection net 2 blocks external organisms to reduce the possibility of epiphytic algae falling off. The series-arranged collection nets 2 improve the collection range at multiple depths, expand the collection efficiency, and at the same time, realize obtaining multi-depth data of the same water area in one collection, so as to form a control group to improve the accuracy of data measurement.

[0028] See the attachedFigure 3 Inside the collection net 2, there are a first rubber ring 21 and a second rubber ring 22 spaced vertically. The outer edges of the first rubber ring 21 and the second rubber ring 22 are both fixed to the inner side of the net body of the collection net 2. There are multiple elastic ropes 23 fixed between the first rubber ring 21 and the second rubber ring 22, and a floating ball 24 is connected to the elastic ropes 23. The first rubber ring 21 and the second rubber ring 22 support the inside of the collection net 2, maintaining the expanded form of the collection net 2, preventing the collection net 2 from entangling itself and losing its collection function. At the same time, it also prevents the collection net 2 from contracting horizontally and rubbing against the fixed stones and breaking. When there are underwater undercurrent fluctuations, the first rubber ring 21 and the second rubber ring 22 can approach each other through the elastic ropes 23 and the floating ball 24, thereby driving the flexible collection net 2 to contract longitudinally in the water. By reducing the contact area between the net body and the water flow, the swaying of the collection net 2 is reduced, preventing the device from leaving the target water area for collection, improving the collection accuracy, and also preventing the connecting ropes 4 from being overly stretched and breaking.

[0029] See the appendix Figure 4 Inside the inner side of the first rubber ring 21, a first rubber strip 25 is arranged in a surrounding manner, and inside the inner side of the second rubber ring 22, a second rubber strip 26 is arranged in a surrounding manner. The first rubber strip 25 and the second rubber strip 26 are arranged in a staggered manner in the projection. The first rubber strip 25 and the second rubber strip 26 form two upper and lower blocking surfaces inside the collection net 2. On the one hand, they can collect the shed epiphytic algae, and on the other hand, they block the organisms moving upward from the bottom of the collection net 2, reducing the probability of the epiphytic algae being gnawed off. The first rubber strip 25 and the second rubber strip 26 filter the epiphytic algae floating up from the bottom through the adjacent gaps, blocking sediment and gravel, and preventing the collection net 2 from being blocked. When the bottom undercurrent surges upward, the first rubber strip 25 and the second rubber strip 26 buffer the water flow through swinging deformation, reducing the probability of the bottom undercurrent impacting the stones and causing the epiphytic algae to fall off, ensuring the collection efficiency. The first rubber strip 25 and the second rubber strip 26 respectively increase the weight at the centers of the first rubber strip 25 and the second rubber ring 22, helping the first rubber strip 25 and the second rubber ring 22 to maintain a vertical posture and float or expand and contract axially, reducing the probability of the stones swaying horizontally and improving the collection effect.

[0030] See the appendix Figure 3 - appendix Figure 5The collection net 2 is fixed with a connecting ring 6 at the upper end. The connecting ring 6 is symmetrically provided with a circular hole 60. A fixing ring 61 for fixing the stone is coaxially arranged inside the connecting ring 6. A ring groove 62 is provided inside the fixing ring 61. A handle 63 is symmetrically fixed outside the fixing ring 61. The handle 63 passes through the circular hole 60. The handle 63 is rotatably connected relative to the circular hole 60. A scale is provided on the upper end surface of the fixing ring 61. The fixing ring 61 is convenient for fixing the stone through the ring groove 62 provided inside the fixing ring 61. After cleaning the upward side of the stone, the fixing ring 61 is driven by the handle 63 held in the circular hole 60 to turn the fixing ring 61 to drive the clean side of the stone downward, which is convenient for non-polluting operation of the stone. The collection net 2 is thrown into the water with the stone. After the algae are attached, the collection net 2 is taken out. The handle 63 is turned to make the collection side face upward. The sampling area is conveniently estimated through the scale. After the estimation is completed, the stone is taken out and the algae are filtered and concentrated through the biological net and introduced into the sampling bottle.

[0031] The connecting ring 6 is coaxially fixed with a sleeve 64 at the position of the circular hole 60. The sleeve 64 is provided with a slide groove 65 on the wall. The handle 63 passes through the sleeve 64 and is fixed with a limiting column 66. The limiting column 66 is cooperatively arranged in the slide groove 65. When the limiting column 66 rotates to the upper and lower travel ends in the slide groove 65, the upper end surface of the fixing ring 61 is respectively facing upward, which is convenient for controlling the direction of the fixing ring 61 when operating the handle 63. At the same time, the slide groove 65 limits the rotation range of the handle 63, reduces the possibility of the handle 63 rotating due to water flow disturbance, and avoids the probability of the attached algae falling off due to repeated turning of the stone.

[0032] See attached Figure 6 -Attached Figure 7 The connecting rope 4 is provided with a cleaning component 7, which includes a floating ring 70 located outside the connecting rope 4, a counterweight plate 71 fixed inside the floating ring 70, and a rotating shaft 72 arranged around the upper and lower end surfaces of the counterweight plate 71, and a ball 73 is connected to the rotating shaft 72 at the end, and the ball 73 is arranged in contact with the connecting rope 4. The floating ring 70 forms the outer protection of the connecting rope 4. When the floating ring 70 drives the counterweight plate 71 to slide on the connecting rope 4 under the action of the water flow, the ball 73 contacts the connecting rope 4 and rotates, which is conducive to removing the plants and attached organisms entangled on the connecting rope 4, reducing the possibility of damage and pollution of algae attached to the bottom during the floating process, improving the detection accuracy, and preventing the connecting rope 4, the main rope body 10 and the auxiliary rope body 30 from being broken due to excessive weight of attached organisms. The counterweight plate 71 reduces the shaking frequency of the connecting rope 4 in the water by increasing the weight, improves the verticality of the overall underwater suspension of the device, and further improves the collection accuracy and ensures the collection volume.

[0033] The counterweight piece 71 is provided with a concave surface 8 on its inner wall. A gap is formed between the concave surface 8 of the counterweight piece 71 and the connecting rope 4. When water passes through the gap, the fluid trajectory is changed, forming an accelerating water flow. On the one hand, it helps to remove the dirt remaining in the gap inside the counterweight piece 71. On the other hand, the accelerating water flow increases the frequency of the floating ring 70 sliding up and down on the connecting rope 4, improving the cleaning effect while driving away the surrounding organisms approaching, and improving the collection stability.

[0034] The floating ring 70 is provided with a protective plate 9 around the middle of its outer wall. The protective plate 9 includes guiding surfaces on the upper and lower sides. The guiding surfaces are concave spherical surfaces and the concave direction is towards the outside of the middle of the protective plate 9. The protective plate 9 is provided with water-permeable holes 90 in an array. When the lateral water flow contacts the protective plate 9, it drives the floating ring 70 to rotate outside the connecting rope 4, thereby eliminating the impact of the lateral water flow. When the longitudinal water flow contacts the guiding surface, it is guided, eliminating the impact of the longitudinal water flow, so that the collection net 2 tends to be stable. When rotating, the water body quickly passes through the water-permeable holes 90 to form bubbles, which helps to promote the floating and collection of algae. At the same time, the bursting of the bubbles around the collection net 2 can remove the stones and stains stuck in the mesh holes, realizing cleaning.

[0035] Preferably, springs 74 are arranged on both the upper and lower end faces of the floating ring 70, and the springs 74 are sleeved outside the connecting rope 4. The springs 74 buffer the impact of the floating ring 70 with the upper collection net 2 and the lower auxiliary floating body 3 through deformation, prevent the collection net 2 and the auxiliary floating body 3 from being damaged, and further increase the up and down swing frequency of the floating ring 70 through deformation reset, which helps the floating ring 70 drive the protective plate 9 to drive away the surrounding microorganisms.

[0036] A benthic epiphytic algae collection and concentration device, and the specific operation method thereof is as follows:

[0037] Select sampling points. The sampling points divide the river section or water area according to factors such as the size, length, shape and environment of the river or lake. 2 to 3 sampling points are set for each river section or water area;

[0038] Search for natural substrates, select suitable substrate stones in size from the bottom sediments of the shallow water areas of the river or lake. The substrate stones preferably have two opposite and relatively flat surfaces;

[0039] Fix the stone, fix the substrate stone on the annular groove 62 inside the fixing ring 61, gently brush off the organisms attached to the stone with a brush, and make the clean surface of the stone face downward positively by rotating the handle 63;

[0040] Lay and place the collection net 2. Align the counterweight and drop it into the water at the sampling point. The main floating body 1 floats on the water surface. The counterweight cooperates with the auxiliary floating body 3 to make multiple collection nets 2 arranged in series up and down and float in the water, blocking the organisms on the outside and filtering the external sediment. The clean surface of the stone facing downward is used for benthic epiphytic algae collection;

[0041] Collect samples, estimate and record the sampling area through the scale on the fixing ring 61, remove the stones, filter and concentrate them through a plankton net, and introduce them into a sample bottle.

[0042] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claimed invention.

Claims

1. A device for collecting and concentrating benthic epiphytic algae, comprising: a main floating body (1) and a collecting net (2) arranged at intervals up and down. The characteristics are as follows: The upper end of the collecting net (2) is open and fixed with stones. A secondary floating body (3) is connected above any one of the collecting nets (2). A main rope body (10) is fixed between the secondary floating body (3) at the top and the main floating body (1). A connecting rope (4) is fixed at the bottom of any one of the collecting nets (2). A counterweight block (5) is fixed at the lower end of the connecting rope (4) at the bottom. In the collecting net (2), a first rubber ring (21) and a second rubber ring (22) are arranged at intervals up and down. The outer edges of the first rubber ring (21) and the second rubber ring (22) are fixed to the inner side of the net body of the collecting net (2). A plurality of elastic ropes (23) are fixed between the first rubber ring (21) and the second rubber ring (22). The elastic ropes (23) are connected with floating balls (24). A first rubber strip (25) is arranged around the inner side of the first rubber ring (21). A second rubber strip (26) is arranged around the inner side of the second rubber ring (22). The first rubber strip (25) and the second rubber strip (26) are arranged in a staggered manner in projection.

2. The device for collecting and concentrating benthic epiphytic algae according to claim 1, characterized in that: a connecting ring (6) is fixed at the upper port of the collecting net (2). Circular holes (60) are symmetrically opened horizontally on the connecting ring (6). A fixing ring (61) for fixing stones is coaxially arranged inside the connecting ring (6). An annular groove (62) is opened inside the fixing ring (61). Handles (63) are symmetrically fixed on the outer side of the fixing ring (61). The handles (63) pass through the circular holes (60). The handles (63) are rotatably connected relative to the circular holes (60). A scale is arranged on the upper end face of the fixing ring (61).

3. The device for collecting and concentrating benthic epiphytic algae according to claim 2, characterized in that: a sleeve (64) is coaxially fixed at the position of the circular hole (60) on the connecting ring (6). A sliding groove (65) is opened on the wall of the sleeve (64). The handle (63) passes through the sleeve (64) and is fixed with a limiting column (66). The limiting column (66) is arranged in cooperation with the sliding groove (65).

4. The device for collecting and concentrating benthic epiphytic algae according to claim 1, characterized in that: a cleaning component (7) is arranged on the connecting rope (4). The cleaning component (7) includes a floating ring (70) located outside the connecting rope (4). A counterweight piece (71) is fixed inside the floating ring (70). Rotating shafts (72) are arranged around the upper and lower end faces of the counterweight piece (71). Spherical balls (73) are rotatably connected to the ends of the rotating shafts (72). The spherical balls (73) are in contact with the connecting rope.

5. The device for collecting and concentrating benthic epiphytic algae according to claim 4, characterized in that: the counterweight piece (71) is provided with an inner concave surface (8) on its inner wall.

6. The device for collecting and concentrating benthic epiphytic algae according to claim 4, characterized in that: The floating ring (70) is provided with a protective plate (9) around the middle of the outer wall. The protective plate (9) includes flow guiding surfaces on the upper and lower sides. The flow guiding surfaces are concave spherical surfaces and the concave directions face the outside of the middle of the protective plate (9). The protective plate (9) is provided with water permeable holes (90) in an array.

7. A benthic epiphytic algae collection and concentration device according to claim 4, characterized in that: Springs (74) are arranged on the upper and lower end faces of the floating ring (70), and the springs (74) are sleeved outside the connecting rope (4).

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