Collecting device for fishery underwater ecological environment investigation

Abstract

The invention relates to the technical field of collection devices, and discloses a collection device for fishery underwater ecological environment investigation, which comprises a sampling pipe pulled by a pulling rope, and also comprises a cylinder body, a plurality of partition plates, a piston plate and a plurality of barrier components, the cylinder body is arranged in the middle of the sampling pipe, and the lower end of the cylinder body is fixedly connected with the bottom wall of the sampling pipe; the multiple partition plates are annularly arranged and horizontally and fixedly connected to the barrel in a sleeving mode, the second port communicates with the water storage cavity and is higher than the first port, the piston plate is movably connected to the interior of the barrel in a sealed mode, and the upper end face of the piston plate is connected with a piston plate driving piece used for driving the piston plate to move upwards. The multiple blocking assemblies are connected to the interiors of the water storage cavities correspondingly and close to the second ports of the corresponding air inlet channels, and when the piston plate moves upwards to the first ports of the air inlet channels at the height of the next water storage cavity, the sealing plugs at the adjacent bottoms stretch into and seal the second ports of the air inlet channels.

Description

Technical Field

[0001] The invention relates to the technical field of collection devices, and in particular to a collection device for investigating underwater ecological environment of fisheries. Background Art

[0002] Fishery resources have always played an important role in the development of human civilization. Fishery resources refer to the overall economic plants and animals such as fish, crustaceans, shellfish, algae and marine mammals with development and utilization value in natural waters. They are the natural source and foundation of fishery production, also known as aquatic resources. According to the water area, they are divided into two categories: inland water fishery resources and marine fishery resources. Ecological surveys of fishery resource habitats help to obtain basic information on the relationship between organisms and the environment and understand the many environmental factors that affect the occurrence and changes of biological phenomena. The survey scenes mainly include: oceans, rivers, lakes and reservoirs.

[0003] At present, water samples are usually collected by using a collection device, which is divided into fixed and movable types. The fixed type mainly extends into the water surface through pipes and pumps all year round, and can continuously extract water samples. However, when collecting and investigating water samples for fishery ecological data, it is necessary to collect water samples from a larger area and at different depths. Therefore, a movable collection device is more suitable for collecting water samples in the ecological environment. The existing sampling equipment usually includes a floating body that can float on the water surface and has a power source, a traction rope, a winding facility for winding the traction rope, a sampling tube, and a counterweight connected to the bottom of the sampling tube. When sampling, the sampling personnel only need to control the floating body to float to a predetermined position through an electrical signal, and then control the motor of the winding facility to continuously lower the traction rope and the sampling tube into the water sample until the sampling tube reaches the corresponding sampling depth, so that the water sample of the predetermined area and depth is gradually poured into the sampling tube, and the traction rope is remotely controlled to pull the sampling tube to achieve sampling of water samples in different areas and depths.

[0004] However, the current sampling equipment has a relatively simple way of collecting water samples, and it is difficult to achieve continuous and efficient classified sampling in water sources at different locations and depths. When sampling water sources at multiple different locations, it frequently performs pulling and lowering operations. The overall sampling process is not only troublesome but also has low sampling efficiency, which undoubtedly delays the detection time of the sampled water samples. Since the detection of fishery water samples is time-sensitive, when the water samples are too long after sampling, the microorganisms therein will also undergo corresponding changes, thereby affecting the accuracy of the test results and the reliability of the data. Summary of the invention

[0005] The invention provides a collection device for investigating the underwater ecological environment of fisheries, which can realize underwater multi-position classified sampling, and the whole sampling process is efficient and fast.

[0006] The present invention provides a collection device for investigating underwater ecological environment of fishery, comprising a sampling tube pulled by a pulling rope, and also comprising: a cylinder, a plurality of partition plates, a piston plate, and a plurality of barrier components. The cylinder is placed in the middle of the sampling tube and the lower end is fixedly connected to the bottom wall of the sampling tube. The plurality of partition plates are all arranged in an annular shape and are all horizontally sleeved and fixedly connected to the cylinder. The outer ring of the partition plate is fixedly connected to the sampling tube. The partition plates are evenly distributed vertically and divide the cylinder and the inner cavity of the sampling tube into a plurality of sealed water storage cavities. The bottom side wall of the sampling tube located in each water storage cavity is provided with a water inlet hole, and an automatically opened and closed valve body is arranged at the water inlet hole. The cylinder is provided with an air inlet channel located in each water storage cavity. The first port of the air channel is connected to the cylinder and the first port is flush with the water inlet hole, the second port is connected to the water storage chamber and the height of the second port is higher than that of the first port, the piston plate is sealingly movably connected in the cylinder, the upper end surface of the piston plate is connected to a piston plate driving member for driving the piston plate to move upward, a plurality of barrier assemblies are respectively connected to each water storage chamber and close to the second port of the corresponding air inlet channel, the barrier assemblies include a sealing plug and a sealing plug driving member for driving the sealing plug to horizontally seal the second port, as the piston plate moves up to the first port of the air inlet channel at the height of the next water storage chamber, the sealing plug at the adjacent bottom extends into and blocks the second port of the air inlet channel.

[0007] Preferably, the volume of the cylinder at the same height as the water storage chamber is greater than the volume of the water storage chamber.

[0008] Preferably, the thickness of the piston plate is greater than the diameter of the first port of each intake channel.

[0009] Preferably, the valve body includes: a sleeve, a sliding plate, and a compression spring. The sleeve is horizontally inserted into the water inlet and fixedly connected to the inner wall of the sampling tube. Both ends of the sleeve have flanges extending toward the center line. The sliding plate is placed in the sleeve and the two are sealed and connected. The sliding plate slides along the axial direction of the sleeve. The circumferential edge of the sliding plate is provided with a plurality of leakage holes along the thickness extension direction. When the sliding plate fits with the flange of the sleeve, each leakage hole is in a blocked state. The compression spring is placed in the sleeve and one end is fixedly connected to the sliding plate, and the other end is fixedly connected to the inner wall of the flange on the side of the sleeve close to the water storage chamber.

[0010] Preferably, the sealing plug driving member is placed in the water storage chamber, and the sealing plug driving member includes: a first rack plate, a gear, and a second rack plate. The tooth surface of the first rack plate faces upward and is slidably connected to the sampling tube. The sealing plug is fixedly connected to one end of the first rack plate close to the corresponding second port. The gear is rotatably connected to the sampling tube through an axle. The tooth surface of the second rack plate extends downward and meshes with the gear. The second rack plate is slidably connected to the sampling tube. A through hole is opened in the cylinder at a height position corresponding to the second rack plate. The second rack plate is fixedly connected to a sliding rod, the sliding rod passes through the through hole and the two are slidably connected. The upper end surface of the piston plate is fixedly connected to an inclined plate for squeezing the sliding rod to slide into the water storage chamber. The end of the second rack plate away from the sliding rod is connected to a limiting portion for controlling its position fixing and resetting.

[0011] Preferably, the limiting portion includes a guide rod fixedly connected to one end of the second rack plate away from the sliding rod and a reset spring sleeved on the guide rod, the other end of the guide rod passes through the sampling tube and the two are sealed and slidably connected, a plurality of first ratchet teeth are arranged on the circumferential side of the guide rod, and a plurality of two second ratchet teeth are arranged on the outer wall of the sampling tube to prevent the first ratchet teeth from self-resetting.

[0012] Preferably, the second ratchet teeth are opposite to each other, and both are connected to the outside of the sampling tube through a bracket, and the second ratchet teeth are connected to the bracket by sliding, and the retraction after the spacing is adjusted is achieved by a tension spring. Specifically, the second ratchet teeth are connected to the bracket by sliding, and the tension spring is connected to the bracket and the second ratchet teeth. When the two second ratchet teeth move away from each other, the spacing between them becomes larger, so that the first ratchet teeth locked therein can be reset by a reset spring, and the sealing plug is released from the second port.

[0013] Preferably, the end of the sliding rod placed in the cylinder is connected to a rubber roller for contacting the inclined plate, and a placement groove corresponding to the size of the rubber roller is opened on the inner wall of the cylinder.

[0014] Preferably, a vent hole is opened on one side of the sampling tube at the bottom, and the vent hole is equipped with a plug.

[0015] Preferably, the sampling tubes are located at a plurality of water inlet holes in each water storage chamber.

[0016] Compared with the prior art, the beneficial effect of the present invention is that the arranged piston plate can form a sealing piston structure with the inner wall of the cylinder body, and when it is driven by the piston plate driving member from the bottom to move upward along the cylinder body, the first port of the air inlet channel at the bottom will generate a negative pressure suction force, and at this time, the continuous suction force will keep the valve body in an open state, and at this time, the water sample at the water area position will enter the water storage chamber through the water inlet hole of the sampling tube, and at this time, when the piston plate moves up to the first port of the air inlet channel at the height of the next water storage chamber, the sealing plug at the adjacent bottom extends into and seals the second port of the air inlet channel, and at this time The piston plate cannot apply negative pressure suction force to the bottom valve body, and the valve body will automatically close, thereby realizing the collection of water samples in the first area. The collected water samples will be stored in the water storage chamber at the bottom. After the water storage chamber at the bottom is filled with water, the piston plate located at the first port of the adjacent upper ventilation channel continues to move upward, thereby realizing the effect of suction on the corresponding valve body. The valve body automatically opens under the action of the suction force, thereby working in a similar way to the above principle, so as to realize the collection of water samples in the second area, and so on, and ultimately realize direct sampling of sewage at multiple sampling points underwater.

[0017] In summary, compared with the sampling method of the prior art, the present device does not require the cumbersome process of frequent sampling, first sampling and then sampling, and also reduces the labor intensity of the sampling personnel, so that the entire sampling process is efficient and fast, ensuring the subsequent detection time and progress of the sample water, avoiding affecting the accuracy of the test results, and improving the reliability of water sample data analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a first embodiment of a piston plate driving member in a collection device for investigating underwater ecological environment of fisheries provided by an embodiment of the present invention;

[0019] Figure 2 A schematic structural diagram of a second embodiment of a piston plate driving member in a collection device for investigating underwater ecological environment of fisheries provided by an embodiment of the present invention;

[0020] Figure 3 A partial structural schematic diagram of a collection device for investigating underwater ecological environment of fisheries provided by an embodiment of the present invention;

[0021] Figure 4 for Figure 3 A partial enlarged view of part A;

[0022] Figure 5 A schematic diagram of the structure of a collection device for underwater ecological environment investigation of fisheries provided by an embodiment of the present invention in a state where the bottom air inlet channel is blocked;

[0023] Figure 6 A front view of a sliding plate in a collection device for investigating underwater ecological environment of fisheries provided in an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 1. Sampling tube; 11. Water inlet hole; 12. Exhaust hole; 13. Plug body; 2. Cylinder body; 21. Inlet channel; 211. First port; 212. Second port; 213. Placement slot; 3. Partition plate; 4. Water storage chamber; 6. Piston plate; 61. Inclined plate; 7. Piston plate driver; 8. Barrier assembly; 81. Sealing plug; 82. Sealing plug driver; 821. First rack plate; 822. Gear; 823. Second rack plate; 824. Sliding rod; 9. Valve body; 91. Sleeve; 92. Sliding plate; 921. Leakage hole; 93. Compression spring; 10. Limiting part; 101. Guide rod; 102. Reset spring; 103. First ratchet; 104. Second ratchet; 105. Bracket; 106. Tension spring. DETAILED DESCRIPTION

[0026] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0027] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention provides a collection device for investigating underwater ecological environment of fishery, comprising a sampling tube 1 pulled by a pulling rope, and also comprising: a cylinder 2, a plurality of partition plates 3, a piston plate 6, and a plurality of barrier components 8. The cylinder 2 is placed in the middle of the sampling tube 1 and the lower end is fixedly connected to the bottom wall of the sampling tube 1. The plurality of partition plates 3 are all arranged in an annular shape and are all horizontally sleeved and fixedly connected to the cylinder 2. The outer ring of the partition plate 3 is fixedly connected to the sampling tube 1. The partition plates 3 are evenly distributed vertically and divide the cylinder 2 and the inner cavity of the sampling tube 1 into a plurality of sealed water storage chambers 4. The bottom side wall of the sampling tube 1 located in each water storage chamber 4 is provided with a water inlet hole 11, and the water inlet hole 11 is provided with an automatic opening and closing valve body 9. The cylinder 2 is provided with an air inlet channel 21 located in each water storage chamber 4, and the first port 211 of the air inlet channel 21 is connected to the cylinder 2 is connected and the first port 211 is flush with the water inlet hole 11, the second port 212 is connected to the water storage chamber 4 and the height of the second port 212 is higher than the height of the first port 211, the piston plate 6 is sealingly and movably connected in the cylinder body 2, and the upper end surface of the piston plate 6 is connected with a piston plate driving member 7 for driving the piston plate 6 to move upward, and a plurality of blocking components 8 are respectively connected in each water storage chamber 4 and close to the second port 212 of the corresponding air inlet channel 21, and the blocking component 8 includes a sealing plug 81 and a sealing plug driving member 82 for driving the sealing plug 81 to horizontally block the second port 212. When the piston plate 6 moves upward to the first port 211 of the air inlet channel 21 at the height of the next water storage chamber 4, the sealing plug 81 at the adjacent bottom extends into and blocks the second port 212 of the air inlet channel 21.

[0029] In the above embodiments, the piston plate 6 is provided to form a sealing piston structure with the inner wall of the cylinder 2. When the piston plate 6 is driven by the piston plate driving member 7 from the bottom to move upward along the cylinder 2, the first port 211 of the air inlet channel 21 at the bottom will generate a negative pressure suction force. At this time, the continuous suction force will keep the valve body 9 in an open state. At this time, the water sample at the water area will enter the water storage chamber 4 through the water inlet hole 11 of the sampling tube 1. At this time, when the piston plate 6 moves up to the first port 211 of the air inlet channel 21 at the height of the next water storage chamber 4, the sealing plug 81 at the adjacent bottom extends into and blocks the second port 212 of the air inlet channel 21. At this time, the piston plate 6 cannot apply negative pressure suction force to the bottom valve body 9, and the valve body 9 will automatically close, so as to realize the collection of water samples in the first area. The collected water samples will be stored in the water storage chamber 4 at the bottom. After the water storage chamber 4 at the bottom is filled with water, the piston plate 6 located at the first port 211 of the adjacent upper ventilation channel continues to move upward, so as to achieve the effect of suction on the corresponding valve body 9. The valve body 9 automatically opens under the action of the suction force, so as to realize the collection of water samples in the second area in a similar working principle as above, and so on, and finally to realize direct sampling of sewage at multiple sampling points underwater.

[0030] In summary, compared with the sampling method of the prior art, the present device does not require the cumbersome process of frequent sampling, first sampling and then sampling, and also reduces the labor intensity of the sampling personnel, so that the entire sampling process is efficient and fast, ensuring the subsequent detection time and progress of the sample water, avoiding affecting the accuracy of the test results, and improving the reliability of water sample data analysis.

[0031] Further, refer to Figure 3 and Figure 5 , the volume of the cylinder 2 at the same height as the water storage chamber 4 is greater than the volume of the water storage chamber 4.

[0032] In the above embodiments, by limiting the volume of the cylinder 2 at the same height as the water storage chamber 4 to be larger than the volume of the water storage chamber 4, after the piston plate 6 moves upward, it can provide a sufficiently large negative pressure suction force to facilitate the water sample to quickly enter the water storage chamber 4.

[0033] Further, refer to Figure 3 The thickness of the piston plate 6 is greater than the diameter of the first port 211 of each intake channel 21 .

[0034] In the above embodiments, by limiting the thickness of the piston plate 6 to be larger than the diameter of the first port 211 of each intake channel 21 , it is possible to avoid the piston plate 6 having difficulty in sealing the first port 211 .

[0035] Further, refer to Figure 3 and Figure 4 and Figure 6The valve body 9 includes: a sleeve 91, a sliding plate 92, and a compression spring 93. The sleeve 91 is horizontally inserted into the water inlet hole 11 and fixedly connected to the inner wall of the sampling tube 1. Both ends of the sleeve 91 have flanges extending in the direction of the center line. The sliding plate 92 is placed in the sleeve 91 and the two are sealed and connected. The sliding plate 92 slides along the axial direction of the sleeve 91. The peripheral edge of the sliding plate 92 is provided with a plurality of leakage holes 921 along the thickness extension direction thereof. When the sliding plate 92 is fitted with the flange of the sleeve 91, each leakage hole 921 is in a blocked state. The compression spring 93 is placed in the sleeve 91 and one end is fixedly connected to the sliding plate 92, and the other end is fixedly connected to the inner wall of the flange of the sleeve 91 close to the water storage chamber 4.

[0036] In the above embodiment, when the piston plate 6 slides upward, the corresponding air inlet channel 21 will provide a negative pressure suction force, so that the sliding plate 92 exceeds the pre-compression value of the compression spring 93 and slides toward the side close to the water storage chamber 4, so that the water sample is passed through the leakage hole 921 on the side of the sliding plate 92 from the outer opening of the sleeve 91, and finally continuously drawn in through the water inlet hole 11 until the water sample is collected. When the suction force of the piston plate 6 is stopped, the sliding plate 92 can re-seal the outer opening of the sleeve 91 under the elastic reset action of the compression spring 93 to avoid leakage of the collected water sample. Furthermore, a sealing layer is provided on the end face of the sliding plate 92, and the flange extending from the sleeve 91 is used to cooperate with the sliding plate 92 to achieve the effect of sealing the leakage hole 921, and the flange close to the side of the water storage chamber 4 is used to connect the compression spring 93.

[0037] Further, refer to Figure 4 , Figure 5 The sealing plug driving member 82 is placed in the water storage chamber 4, and the sealing plug driving member 82 includes: a first rack plate 821, a gear 822, and a second rack plate 823. The tooth surface of the first rack plate 821 faces upward and is slidably connected to the sampling tube 1. The sealing plug 81 is fixedly connected to the first rack plate 821 at one end close to the corresponding second port 212. The gear 822 is rotatably connected to the sampling tube 1 through the axle. The tooth surface of the second rack plate 823 extends downward and meshes with the gear 822. The second rack plate 823 is slidably connected to the sampling tube 1. A through hole is opened at the height position of the cylinder 2 corresponding to the second rack plate 823. The second rack plate 823 is fixedly connected to a sliding rod 824. The sliding rod 824 passes through the through hole and the two are slidably connected. The upper end surface of the piston plate 6 is fixedly connected to an inclined plate 61 for squeezing the sliding rod 824 to slide into the water storage chamber 4. The end of the second rack plate 823 away from the sliding rod 824 is connected to a limiting portion 10 for controlling its position fixing and resetting.

[0038] In the above embodiments, the first rack plate 821 and the second rack plate 823 are both meshed with the gear 822, wherein the upward movement of the inclined plate 61 can enable the sealing plug 81 to have a sealing effect on the second port 212 during the sliding process of the sliding rod 824 into the water storage wall, and the limiting portion 10 can prevent the sliding rod 824 from automatically resetting.

[0039] Further, refer to Figure 4 The limiting portion 10 includes a guide rod 101 fixedly connected to one end of the second rack plate 823 away from the sliding rod 824 and a reset spring 102 sleeved on the guide rod 101. The other end of the guide rod 101 passes through the sampling tube 1 and the two are sealed and slidably connected. A plurality of first ratchet teeth 103 are arranged on the circumferential side of the guide rod 101, and a plurality of two second ratchet teeth 104 are arranged on the outer wall of the sampling tube 1 to prevent the first ratchet teeth 103 from self-resetting.

[0040] In the above embodiments, the effect of the limiting guide rod 101 can be achieved by providing the second ratchet 104 and the first ratchet 103 , wherein the reset spring 102 plays the role of resetting the knife rod.

[0041] Further, refer to Figure 4 , the second ratchet teeth 104 have opposite tooth tips, and both are connected to the outside of the sampling tube 1 through the bracket 105, and the second ratchet teeth 104 are connected to the bracket 105 by sliding, and the tension spring 106 is used to achieve the retraction after the spacing is adjusted. Specifically, the second ratchet teeth 104 are connected to the bracket 105 by sliding, and the tension spring 106 is connected to the bracket 105 and the second ratchet teeth 104. When the two second ratchet teeth 104 move in a direction away from each other, the spacing between the two becomes larger, so that the first ratchet teeth 103 locked therein can be reset by the reset spring 102, and the sealing plug 81 is now out of the second port 212.

[0042] Further, refer to Figure 3 and Figure 4 The end of the sliding rod 824 placed in the cylinder 2 is connected to a rubber roller for contacting the inclined plate 61, and a placement groove 213 is opened on the inner wall of the cylinder 2 corresponding to the size of the rubber roller.

[0043] In the above embodiment, the rigid contact between the sliding rod 824 and the inclined plate 61 can be avoided. At the same time, since the piston plate 6 needs to move upward, the placement groove 213 is provided to play the role of internal placement of the rubber roller.

[0044] Further, refer to Figure 1 , Figure 2 and Figure 5 A vent hole 12 is provided on one side of the sampling tube 1 at the bottom, and the vent hole 12 is equipped with a plug body 13 .

[0045] In the above embodiments, the exhaust hole 12 is used to reset the piston plate 6 after sampling and testing the sampled water. The exhaust hole 12 can be opened to discharge the gas in the cylinder 2 and reset the piston plate 6 to the bottom of the cylinder 2.

[0046] Further, refer to Figure 5 The sampling tube 1 is located in each water storage chamber 4 and has a plurality of water inlet holes 11 .

[0047] In the above embodiments, by providing a plurality of water inlet holes 11 , the efficiency of collecting water samples can be improved. However, too many water inlet holes 11 means that the number of valve bodies 9 also increases, so two water inlet holes are preferably provided.

[0048] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A collection device for investigating underwater ecological environment of fisheries, characterized in that: include: The cylinder (2) is placed in the middle of the sampling tube (1) and the lower end of the cylinder is fixedly connected to the bottom wall of the sampling tube (1); A plurality of partition plates (3) are arranged in an annular shape and are horizontally sleeved and fixedly connected to the cylinder (2). The partition plates (3) are evenly distributed in the vertical direction and divide the cylinder (2) and the inner cavity of the sampling tube (1) into a plurality of sealed water storage chambers (4). The bottom side wall of the sampling tube (1) located in each water storage chamber (4) is provided with a water inlet hole (11), and the water inlet hole (11) is provided with an automatically opening and closing valve body (9). The cylinder (2) is located in each water storage chamber (4) and is provided with an air inlet channel (21). The first port (211) of the air inlet channel (21) is connected to the cylinder (2) and the first port (211) is flush with the water inlet hole (11), and the second port (212) is connected to the water storage chamber (4) and the height of the second port (212) is higher than the height of the first port (211); A piston plate (6) is sealingly and movably connected to the cylinder (2), and the upper end surface of the piston plate (6) is connected to a piston plate driving member (7) for driving the piston plate (6) to move upward; A plurality of blocking assemblies (8) are respectively connected to each of the water storage chambers (4) and close to the second port (212) of the corresponding air inlet channel (21), and the blocking assembly (8) comprises a sealing plug (81) and a sealing plug driving member (82) for driving the sealing plug (81) to horizontally block the second port (212).

2. A collection device for investigating underwater ecological environment of fisheries as claimed in claim 1, characterized in that: The volume of the cylinder (2) at the same height as the water storage chamber (4) is greater than the volume of the water storage chamber (4).

3. A collection device for investigating underwater ecological environment of fisheries as claimed in claim 1 or 2, characterized in that: The thickness of the piston plate (6) is greater than the diameter of the first port (211) of each of the air intake channels (21).

4. A collection device for investigating underwater ecological environment of fisheries as claimed in claim 3, characterized in that: The valve body (9) comprises: A sleeve (91) is horizontally inserted into the water inlet hole (11) and fixedly connected to the inner wall of the sampling tube (1), and both ends of the sleeve (91) have flanges extending in the direction of the center line; A sliding plate (92) is placed in the sleeve (91) and the two are sealed and connected. The sliding plate (92) slides along the axial direction of the sleeve (91). A plurality of leakage holes (921) are provided along the peripheral edge of the sliding plate (92) along the thickness extension direction. When the sliding plate (92) and the flange of the sleeve (91) are in contact, each leakage hole (921) is in a blocked state. A compression spring (93) is placed in the sleeve (91) and has one end fixedly connected to the sliding plate (92) and the other end fixedly connected to the inner wall of the flange of the sleeve (91) close to the water storage chamber (4).

5. A collection device for investigating underwater ecological environment of fisheries as claimed in claim 4, characterized in that: The sealing plug driving member (82) is placed in the water storage chamber (4), and the sealing plug driving member (82) comprises: A first rack plate (821) with a tooth surface facing upward and slidably connected to the sampling tube (1); the sealing plug (81) is fixedly connected to one end of the first rack plate (821) close to the corresponding second port (212); A gear (822) is rotatably connected to the sampling tube (1) via a wheel shaft; The second rack plate (823) has a tooth surface extending downward and meshing with the gear (822). The second rack plate (823) is slidably connected to the sampling tube (1). The cylinder (2) is provided with a through hole at a height position corresponding to the second rack plate (823). The second rack plate (823) is fixedly connected with a sliding rod (824). The sliding rod (824) passes through the through hole and the two are slidably connected. The upper end surface of the piston plate (6) is fixedly connected with an inclined plate (61) for pressing the sliding rod (824) to slide into the water storage chamber (4). The end of the second rack plate (823) away from the sliding rod (824) is connected with a limiting portion (10) for controlling its position fixing and resetting.

6. A collection device for investigating underwater ecological environment of fisheries as claimed in claim 5, characterized in that: The limiting portion (10) comprises a guide rod (101) fixedly connected to one end of the second rack plate (823) away from the sliding rod (824) and a reset spring (102) sleeved on the guide rod (101); the other end of the guide rod (101) passes through the sampling tube (1) and the two are sealed and slidably connected; a plurality of first ratchet teeth (103) are arranged on the peripheral side of the guide rod (101); and a plurality of second ratchet teeth (104) are arranged on the outer wall of the sampling tube (1) to prevent the first ratchet teeth (103) from self-resetting.

7. A collection device for investigating underwater ecological environment of fisheries as claimed in claim 1, characterized in that: The second ratchet teeth (104) have opposite tooth tips, and both are connected to the outside of the sampling tube (1) through a bracket (105). The second ratchet teeth (104) are slidably connected to the bracket (105), and retract after the spacing is adjusted by stretching a spring (106).

8. A collection device for investigating underwater ecological environment of fisheries as claimed in claim 5, characterized in that: The end of the sliding rod (824) placed in the cylinder (2) is connected to a rubber roller for contacting the inclined plate (61), and a placement groove (213) corresponding to the size of the rubber roller is opened on the inner wall of the cylinder (2).

9. A collection device for investigating underwater ecological environment of fisheries as claimed in claim 1, characterized in that: The sampling tube (1) is provided with an exhaust hole (12) on one side located at the bottom, and the exhaust hole (12) is equipped with a plug (13).

10. A collection device for investigating underwater ecological environment of fisheries as claimed in claim 1, characterized in that: The sampling tube (1) is located at a plurality of water inlet holes (11) of each of the water storage chambers (4).

Images