Water runner sampling device

Abstract

The utility model discloses a water flow channel sampling device, and relates to the technical field of nuclear power station operation and maintenance, the water flow channel sampling device comprises a sampling net basket, one side of the sampling net basket facing the upstream of the water flow is provided with a net basket inlet, and the net basket inlet is arranged close to the upper part of the sampling net basket and is configured to allow water creatures to enter the sampling net basket along with the water flow; a blocking net is arranged on at least one surface, facing the downstream of the water flow, of the sampling net basket, and the blocking net is configured to allow the water flow to pass and block entering aquatic organisms; the positioning assembly is connected to the sampling net basket, the positioning assembly comprises at least one telescopic supporting piece, and the telescopic supporting piece is configured to be adjustable in length, so that the two ends of the telescopic supporting piece abut against the two side walls of the water flow channel respectively. According to the sampling device, representativeness and accuracy of sampling data are guaranteed, stable work of the sampling net basket is guaranteed, operation is easy and convenient, time and labor are saved, and the placing and recycling efficiency of the sampling device is improved.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power plant operation and maintenance technology, and in particular to a water flow channel sampling device. Background Technology

[0002] The Cold Source Seawater Filtration (CFI) system is the front-end system of the nuclear power plant's cold source system, used to ensure the water requirements of the unit's SEC (Self-Controlled Filtering) and SRU (Self-Controlled Runner) systems. During CFI operation, to check the filtration effectiveness of the CFI backwash drum screen, at least two people must manually collect and weigh aquatic organisms from each backwash channel using a metal frame. Due to a lack of positioning measures, to prevent the metal frame from being swept downstream by the high-speed water flow in the backwash channel, two people must work together to forcefully step on it to secure it in the channel. This makes placing and retrieving the metal frame relatively difficult, time-consuming, and labor-intensive. Furthermore, under conditions of high water velocity or high water density, the metal frame is difficult to maintain stable operation in the channel. Moreover, the upstream end of the metal frame is generally open, and during sample retrieval after sampling, the collected aquatic organism samples are easily lost due to the impact of the high-speed water flow when the frame is lifted, resulting in incomplete sampling. This affects the representativeness and accuracy of the data, making it difficult to guarantee data quality and accurately reflect the seawater filtration status, leading to misjudgments of the cold source filtration effect. Utility Model Content

[0003] To address the aforementioned technical problems, this application provides a water flow channel sampling device, which solves the technical issues of difficult sampling of aquatic organisms in the backwash water flow channel of existing cold source seawater filtration systems, time-consuming and labor-intensive operation, and easy loss of collected samples. This application ensures the representativeness and accuracy of sampling data, guarantees the stable operation of the sampling basket, is simple and convenient to operate, saves time and labor, and improves the efficiency of sampling device placement and retrieval.

[0004] This application provides a water flow channel sampling device for collecting aquatic organisms in a water flow channel. The sampling device includes: a sampling basket with an inlet on the upstream side facing the water flow, the inlet being located near the upper part of the basket and configured to allow aquatic organisms to enter the basket with the water flow; a barrier net on at least the downstream side of the basket, configured to allow water flow through and block the entering aquatic organisms; and a positioning component connected to the sampling basket, the positioning component including at least one telescopic support member configured to be length-adjustable so that both ends of the telescopic support member abut against the side walls of the water flow channel.

[0005] In some embodiments, the sampling basket includes: a frame body, at least partially conforming to the inner wall of the water channel, the front end of the frame body facing upstream of the water flow being an open structure, the frame body having a plurality of hollow areas at least on the back facing downstream of the water flow, the barrier net being fixedly connected to the frame body and covering all of the hollow areas; and a gate, detachably connected to the front end of the frame body and capable of closing the lower area of ​​the open structure, the gate defining the basket entrance between the gate and the front end of the frame body.

[0006] In some embodiments, the gate is slidably connected to the frame body, and the gate can reciprocate along a first direction, the first direction being perpendicular to the water flow direction and the width direction of the water channel; wherein, when the gate moves up along the first direction, the opening area of ​​the basket inlet gradually decreases, the lower region of the open structure gradually becomes exposed and forms a discharge port, the discharge port being configured to allow the collected aquatic organisms to be poured out.

[0007] In some embodiments, the sampling basket further includes a pull-out member connected to the gate, used to control the gate to reciprocate along the first direction.

[0008] In some embodiments, the telescopic support is connected to the frame along a second direction, which is the same as the width direction of the water channel; the telescopic support includes: an outer tube, one end of which is provided with a first stop and the other end of which is provided with a telescopic hole; a telescopic part, one end of which is movably inserted into the outer tube through the telescopic hole and the other end of which is provided with a second stop; wherein the telescopic part is configured to adjust its length extending out of the outer tube; the first stop is configured to abut against one side wall of the water channel and the second stop is configured to abut against the other side wall of the water channel.

[0009] In some embodiments, the telescopic support further includes: a first anti-slip pad fixedly disposed on the end face of the first stop portion facing away from the telescopic portion, the first anti-slip pad being configured to be clamped between the first stop portion and one side wall of the water channel; and a second anti-slip pad fixedly disposed on the end face of the second stop portion facing away from the outer sleeve, the second anti-slip pad being configured to be clamped between the second stop portion and the other side wall of the water channel.

[0010] In some embodiments, the telescopic part is threadedly connected to the outer sleeve to adjust the length of the telescopic part extending out of the outer sleeve by rotation; or, the telescopic part is slidably connected to the outer sleeve to adjust the length of the telescopic part extending out of the outer sleeve by pulling.

[0011] In some embodiments, the positioning assembly further includes: a telescopic control member connected to the telescopic support member along a first direction and extending at least partially upward beyond the sampling basket, the telescopic control member being configured to rotate about its own axis; the first direction being perpendicular to the water flow direction and the width direction of the water channel; and a reversing transmission assembly drivingly connecting the telescopic control member and the telescopic part, for converting the rotation of the telescopic control member into linear motion of the telescopic part along the second direction.

[0012] In some embodiments, the reversing transmission assembly includes: a drive screw coaxially disposed on the telescopic control member; a transmission lead screw rotatably connected coaxially to the outer sleeve; a driven gear coaxially sleeved on the transmission lead screw, and the driven gear meshing with the drive screw; and a nut threadedly connected to the transmission lead screw; wherein the telescopic part is fixedly sleeved on the nut, and the telescopic part is slidably connected to the outer sleeve.

[0013] In some embodiments, the basket inlet is at least partially above the water surface; and / or, the top of the sampling basket is provided with a handle, which is at least partially above the water surface.

[0014] The water flow channel sampling device provided in this application guides aquatic organisms in the water flow into the sampling basket through a relatively high-positioned basket inlet, ensuring the representativeness and accuracy of the sampling data. This allows for precise reflection of seawater filtration and avoids misjudgment of the cold source filtration effect. The sampling basket is fixed in the water flow channel by a positioning component, ensuring stable operation. The device is simple, convenient, time-saving, and labor-saving, improving the efficiency of sampling device placement and retrieval. Attached Figure Description

[0015] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0016] Figure 1 This is a front view schematic diagram of the overall structure of one embodiment of the sampling device of this application;

[0017] Figure 2 This is a rear view schematic diagram of the overall structure of one embodiment of the sampling device of this application;

[0018] Figure 3 This is a side view of the overall structure of one embodiment of the sampling device of this application;

[0019] Figure 4 This is a three-dimensional structural diagram of the sampling basket of one embodiment of the sampling device of this application;

[0020] Figure 5 yes Figure 4A three-dimensional structural diagram of the sampling basket after the gate is removed;

[0021] Figure 6 This is a partial cross-sectional view of the positioning component of one embodiment of the sampling device of this application.

[0022] The attached figures are labeled as follows:

[0023] 10 - Sampling basket, 101 - Basket inlet, 20 - Positioning component;

[0024] 1-Frame body, 11-Horizontal support bar, 12-Longitudinal support bar, 13-Vertical support bar, 14-Interlocking groove, 2-Gate, 21-Connecting part, 211-Connecting hole, 3-Barrier net, 4-Handle, 5-Telescopic support component, 51-Outer sleeve, 511-First stop part, 512-Telescopic hole, 513-First anti-slip pad, 514-Bearing, 515-Housing housing, 52-Telescopic part, 521-Second stop part, 522-Second anti-slip pad, 53-First connecting ring, 54-Second connecting ring, 6-Telescopic control component, 61-Handle, 62-Drive screw, 7-Driven gear, 8-Transmission screw, 9-Nut. Detailed Implementation

[0025] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the technical solutions of this utility model will be further described in detail below through specific embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0026] Please see Figures 1 to 4 In some embodiments of this application, a water flow channel sampling device is provided. This sampling device is used to collect aquatic organisms in a water flow channel. A water flow channel refers to a water passage with a certain length, width, and depth. The following description uses the backwash water flow channel of a cold source seawater filtration system as an example. For ease of understanding, the length direction of the water flow channel is defined as the Y-axis, the width direction as the X-axis, and the depth direction as the Z-axis. The depth direction of the water flow channel is the vertical direction. Aquatic organisms refer to organisms of a certain volume in the water flow that can be trapped by a net. The following description uses marine organisms (such as fish, shrimp, shellfish, algae, seaweed, etc.) in the backwash water flow channel as an example.

[0027] The sampling device of this application includes a sampling basket 10 and a positioning component 20 (such as...). Figure 1 As shown in the image), the sampling basket 10 has a basket-like structure (as shown in the image). Figure 4As shown in the diagram, the shape of the sampling basket 10 can be configured to at least partially match the cross-sectional inner wall shape of the water channel. The outer perimeter of the sampling basket 10 can be set to be slightly smaller than the cross-sectional inner wall size of the water channel to ensure that the sampling basket 10 can be smoothly placed into or removed from the water channel. The outer perimeter of the sampling basket 10 needs to ensure proper placement and form a lateral interception of the water channel to prevent aquatic organisms from leaking through the gap between the outer perimeter of the sampling basket 10 and the inner wall of the water channel and flowing downstream, thus ensuring the integrity of the sampling data. In this embodiment, the overall shape of the sampling basket 10 is adapted to the shape of the inner wall of the backwash water channel. The sampling basket 10 includes a front end facing upstream of the water flow, a back end facing downstream of the water flow, side portions corresponding to the two side walls of the backwash water channel, and a bottom portion corresponding to the bottom surface of the backwash water channel. The water flow in the backwash water channel flows from the front end of the sampling basket 10 to the back end of the sampling basket 10.

[0028] The sampling basket 10 has a basket inlet 101 on the side facing upstream of the water flow (e.g., Figure 4 As shown in the diagram, the basket inlet 101 is located at the front end of the sampling basket 10, close to the upper part of the basket, so that the basket inlet 101 is relatively far from the bottom wall of the backwash water channel. The basket inlet 101 is configured to allow aquatic organisms to enter the sampling basket 10 with the water flow. The sampling basket 10 has a net 3 on at least one side facing downstream, that is, the net 3 is at least located on the back of the sampling basket 10. The net 3 is configured to allow water flow through and block aquatic organisms from entering the sampling basket 10, ensuring that the water flows smoothly downstream while intercepting aquatic organisms. The upper part of the sampling basket 10 refers to the upper part in the direction of gravity. When the sampling basket 10 is lowered into the backwash water channel along the Z-axis, the upper part of the sampling basket 10 is relatively far from the bottom surface of the backwash water channel. The mesh diameter of the barrier net 3 can be set at around 1-3mm, preferably 2mm, which ensures effective interception of marine life while allowing water to flow smoothly.

[0029] The positioning component 20 is connected to the sampling basket 10. It can be located at the front end of the sampling basket 10 facing upstream of the water flow, or at the back end of the sampling basket 10 facing downstream of the water flow, or simultaneously at both the front and back ends of the sampling basket 10. This application does not limit this, as long as it can limit and fix the sampling basket 10 in the backwash water flow channel and does not affect aquatic organisms from entering the sampling basket 10 through the basket inlet 101. The positioning component 20 includes at least one telescopic support member 5 (e.g., Figures 1 to 2As shown in the diagram, the telescopic support 5 is configured to be length-adjustable so that both ends of the telescopic support 5 can abut against the two side walls of the water flow channel. The number of telescopic support 5 can be one or more. The more telescopic support 5 there are, the better the limiting and fixing effect on the sampling basket 10 will be. However, the cost of the sampling device will also increase with the increase in the number of telescopic support 5.

[0030] In the following embodiments, the positioning component 20 is described using two telescopic support members 5 as an example. The two telescopic support members 5 are arranged in an upper and lower configuration and are laterally connected to the back of the sampling basket 10 facing downstream of the water flow. That is, the telescopic support members 5 are connected to the sampling basket 10 along the X-axis so that the sampling basket 10 has four support limiting points in two sets (upper and lower) in the depth direction of the backwash water flow channel. This allows the sampling basket 10 to be stably limited and fixed in the backwash water flow channel with a relatively smaller number of telescopic support members, preventing the sampling basket 10 from tipping over or swinging under the impact of the water flow.

[0031] The water flow channel sampling device provided in this application guides marine organisms in the water flow into the sampling basket 10 through a relatively high-positioned basket inlet 101. This makes the lower space of the basket inlet 101 inside the sampling basket 10 a collection cavity for marine organism samples. This prevents the collected marine organism samples from being lost due to water flow impact when the sampling basket 10 is lifted during the retrieval of the sampling device. It achieves complete sampling of marine organisms in the backwash water flow channel within a set time period, ensuring the representativeness and accuracy of the sampling data. This allows for precise reflection of seawater filtration and avoids misjudgment of the cold source filtration effect.

[0032] Furthermore, the water flow channel sampling device provided in this application uses a positioning component 20 to fix the sampling basket 10 in the water flow channel, ensuring the stable operation of the sampling basket 10. Moreover, the length of the telescopic support 5 of the positioning component 20 is adjustable. When placing the sampling basket 10, there is no need for the operator to forcefully step on it to wedge it into the water flow channel. Simply adjusting the length of the telescopic support 5 so that its two ends abut against the side walls of the water flow channel easily secures the sampling basket 10 in the channel. Similarly, when retrieving the sampling basket 10, adjusting the length of the telescopic support 5 so that at least one end of the telescopic support 5 is detached from the side wall of the water flow channel allows for easy lifting and retrieval of the sampling basket 10. The operation is simple, convenient, time-saving, and labor-saving, significantly improving the efficiency of sampling device placement and retrieval, and enhancing the convenience and efficiency of sampling operations.

[0033] Please see Figure 1 , Figure 4 and Figure 5 In some embodiments, the sampling basket 10 includes a frame 1 and a gate 2 (such as...). Figure 1 and Figure 4As shown in the diagram, the frame 1 at least partially fits the inner wall of the water channel, and the front end of the frame 1 facing upstream of the water flow is an open structure (as shown in the diagram). Figure 5 As shown in the figure, the frame body 1 has several hollow areas on its back facing downstream of the water flow, and the net 3 is fixedly connected to the frame body 1 and covers all the hollow areas.

[0034] The gate 2 is detachably connected to the front end of the frame 1 and can close the lower area of ​​the open structure. The gate 2 and the front end of the frame 1 define the basket entrance 101.

[0035] The frame 1 and the mesh 3 can be woven and welded from stainless steel strips, or cut and welded from stainless steel plates, to improve the structural strength and rust and corrosion resistance of the sampling basket 10. Alternatively, the frame 1 and the mesh 3 can also be made of other metals or non-metals with high strength and corrosion resistance. This application does not limit this, as long as the structural strength and rust and corrosion resistance of the sampling basket 10 are guaranteed. Figure 5 As shown in the figure, the frame body 1 in this embodiment is described by way of example, which is welded from stainless steel strips. The frame body 1 has multiple horizontal support strips 11 extending along the X-axis, multiple longitudinal support strips 12 extending along the Y-axis, and multiple vertical support strips 13 extending along the Z-axis. The hollow area is formed by the gaps between adjacent horizontal support strips 11, longitudinal support strips 12, and vertical support strips 13.

[0036] The gate 2 can be made of stainless steel. The gate 2 is preferably designed as a plate structure, that is, the gate 2 does not have mesh holes for water to pass through. In this way, the water at the bottom of the backwash water channel can be forced to flow upward to the basket inlet 101 through the plate structure of the gate 2, and then carry the marine organisms in the water into the collection chamber of the sampling basket 10 from the basket inlet 101. This effectively avoids the marine organisms in the backwash water channel getting caught or stuck on the mesh of the gate. In addition, the gate 2 can block the marine organisms in the collection chamber, preventing the marine organisms collected in the sampling basket 10 from escaping during the sampling process. It also avoids the problem of marine organism samples collected being lost due to water flow impact when the sampling device is retrieved or the sampling basket 10 is lifted.

[0037] The water flow channel sampling device provided in this application has a gate 2 that is detachably connected to the frame 1. Before placing the sampling device, the operator installs the gate 2 to the front end of the frame 1. After installation, the gate 2 and the front end of the frame 1 define the basket inlet 101. When recovering samples, the operator only needs to remove the gate 2 to pour out the collected marine biological samples from the open structure at the front end of the frame 1. The operation is simple and convenient, and the sample recovery efficiency is improved.

[0038] Please see Figure 5In some embodiments, the sides and bottom of the frame 1 are also provided with several hollow areas, all of which are covered by the netting 3. With hollow areas on the sides and bottom of the frame 1 and covered by the netting 3, water in the collection chamber can be drained out promptly through the hollow areas on the sides and bottom during sample retrieval and removal of the sampling basket 10. This facilitates rapid drying of the collected marine samples and prevents residual water from interfering with subsequent weighing of the marine samples. Furthermore, with hollow areas on the sides and bottom of the frame 1 and covered by the netting 3, water flow is facilitated to pass quickly through the sampling basket 10, reducing the impact of the water flow on the sampling basket 10.

[0039] The netting 3 can be welded and fixed to the corresponding surface of the frame 1 and cover all the open areas on that surface; the netting 3 can also be welded and fixed independently to the corresponding positions of the frame 1 and cover the corresponding open areas; the netting 3 can also be detachably connected to the frame 1 so that it can be replaced after it is damaged.

[0040] In some embodiments, the gate 2 is slidably connected to the frame 1, and the gate 2 can reciprocate along a first direction, which is perpendicular to the water flow direction and the width direction of the water channel.

[0041] When the gate 2 moves up along the first direction, the opening area of ​​the basket inlet 101 gradually decreases, and the lower part of the open structure at the front end of the frame body 1 gradually becomes visible and forms a discharge port, which is configured to allow the collected aquatic organisms to be poured out.

[0042] When the sampling basket 10 is placed vertically in the backwash water channel, the first direction is the vertical direction, i.e., the Z-axis. The gate 2 is slidably connected to the frame body 1 and can move back and forth in the vertical direction. When in use, the operator only needs to push the gate 2 vertically downward into place, which will close the lower part of the open structure at the front end of the frame body 1. This will define the basket inlet 101 between the gate 2 and the front end of the frame body 1, the lower part of the gate 2 and the frame body 1, and the collection chamber between the net 3 and the net, thereby realizing the collection of marine organisms in the backwash water channel. When recovering the sample, the operator only needs to pull the gate 2 vertically upward, which will form a discharge port at the lower front end of the frame body 1, making it easy to pour out the collected marine organism samples for sample statistics and weighing. Therefore, there is no need to disassemble or assemble the gate 2, which further improves the convenience of sampling.

[0043] Please see Figure 5 In some embodiments, the lower front end of the frame body 1 is provided with a plug groove 14 arranged around its outer periphery, and the gate 2 is slidably connected to the frame body 1 through the plug groove 14.

[0044] The sampling basket 10 also includes a pull-out component (not shown in the figure), which is connected to the gate 2 and used to control the gate 2 to reciprocate along a first direction. The pull-out component can be manually pulled out or automatically pulled out by a motor and transmission components, etc., and this application does not limit this. Controlling the movement of the gate 2 by the pull-out component further improves the convenience of the sampling operation.

[0045] Please see Figure 4 In this embodiment, the pull-out component is described using a pull rope as an example. Correspondingly, the upper end of the gate 2 is provided with a connecting part 21, and a connecting hole 211 is provided through the connecting part 21. One end of the pull rope is bound to the connecting hole 211, and the other end of the pull rope can be pulled by hand by the operator. When collecting samples, the operator can lift the gate 2 upwards in the first direction using the pull rope, thereby forming a discharge port at the lower front end of the sampling basket 10, facilitating the pouring out of the collected marine biological samples. After the operator releases the pull rope, the gate 2 can move downwards in the first direction under its own gravity, resetting the gate 2 so that aquatic organisms in the backwash water channel can be collected through the sampling basket 10.

[0046] In some embodiments, after the sampling basket 10 is placed in position, the basket inlet 101 is at least partially above the water surface, which means that the water flow must enter through the basket inlet 101. This prevents some aquatic organisms from escaping with the water flow after the basket inlet 101 is completely submerged in the water flow, ensuring the representativeness and accuracy of the sampling data. This allows for a precise reflection of the seawater filtration situation and avoids misjudgment of the cold source filtration effect.

[0047] Please see Figures 1 to 5 In some embodiments, the top of the sampling basket 10 is provided with a handle 4. After the sampling basket 10 is placed in place, the handle 4 is at least partially above the water surface, which makes it convenient for the operator to lift the entire sampling device out of the water channel through the handle 4, further improving the convenience of the sampling operation.

[0048] Please see Figure 2 and Figure 6 In some embodiments, the telescopic support 5 is connected to the side of the frame 1 facing downstream of the water flow along a second direction, which is the same as the width direction of the water flow channel, that is, the telescopic support 5 is connected to the back of the sampling basket 10 along the X-axis.

[0049] The telescopic support 5 includes an outer sleeve 51 and a telescopic part 52. The outer sleeve 51 is a hollow tubular structure and can be made of stainless steel or other materials with appropriate strength and corrosion resistance. One end of the outer sleeve 51 is provided with a first stop 511, and the other end of the outer sleeve 51 is provided with a telescopic hole 512 communicating with its inner cavity (e.g., ...). Figure 6(As shown in the diagram). The telescopic part 52 can be configured as a solid rod-shaped structure with an outer diameter matching the diameter of the telescopic hole 512, or it can be configured as a hollow tubular structure with an outer diameter matching the diameter of the telescopic hole 512; this application does not limit this. The telescopic part 52 can be made of stainless steel or other materials with appropriate strength and corrosion resistance. One end of the telescopic part 52 is movably inserted into the outer sleeve 51 through the telescopic hole 512, and the other end of the telescopic part 52 is provided with a second stop 521.

[0050] The telescopic part 52 is configured to adjust its length extending out of the outer sleeve 51. The first stop part 511 is configured to abut against one side wall of the backwash water channel, and the second stop part 521 is configured to abut against the other side wall of the backwash water channel. That is, the first stop part 511 and the second stop part 521 are respectively located at both ends of the telescopic support member 5, and the first stop part 511 and the second stop part 521 abut against the two side walls of the backwash water channel. The outer end faces of the first stop part 511 and the second stop part 521 are configured to match the side wall surfaces of the backwash water channel to ensure reliable contact between the two ends of the telescopic support member 5 and the two side walls of the backwash water channel, and to ensure that the sampling basket 10 can work stably during the sampling process.

[0051] The telescopic part 52 can be configured to be threadedly connected to the outer sleeve 51, allowing the length of the telescopic part 52 extending out of the outer sleeve 51 to be adjusted by rotation. For example, an internal thread can be provided on the inner wall of the outer sleeve 51, and a matching internal thread can be provided on the outer wall of the telescopic part 52. By rotating either the outer sleeve 51 or the telescopic part 52, the length of the telescopic part 52 extending out of the outer sleeve 51 can be adjusted, thereby adjusting the overall length of the telescopic support 5 and thus limiting and fixing the sampling basket 10 in the backwash water channel. To fix the length of the telescopic support 5 and prevent the telescopic part 52 from retracting during sampling, a locking cap can be used to fix the adjusted telescopic part 52 to the outer sleeve 51.

[0052] Alternatively, the outer sleeve 51 and the telescopic part 52 can be connected by a double-ended screw with both positive and negative threads and a matching screw nut. The design of the double-ended screw with both positive and negative threads effectively prevents the telescopic part 52 from moving relative to the outer sleeve 51 during the sampling process, and also simplifies the installation and improves the efficiency of operation.

[0053] In some other embodiments, the telescopic part 52 can also be configured to slide and connect to the outer sleeve 51, so that the length of the telescopic part 52 extending out of the outer sleeve 51 can be adjusted by pulling. For example, the telescopic part 52 can be configured to have a clearance fit with the outer sleeve 51, and a locking screw that can radially abut against the outer wall of the telescopic part 52 can be threaded onto the outer sleeve 51. The friction between the outer sleeve 51 and the telescopic part 52 is used to initially define the position of the telescopic part 52. In use, the length of the telescopic part 52 extending out of the outer sleeve 51 can be adjusted by pulling the telescopic part 52 outward or pushing it inward. After adjustment, the locking screw is tightened to abut against the telescopic part 52, thereby fixing the length of the telescopic support 5 and preventing the telescopic part 52 from retracting during sampling.

[0054] During use, the operator can change the total length of the telescopic support 5 by adjusting the length of the telescopic part 52 extending out of the outer sleeve 51, thereby abutting the first stop part 511 and the second stop part 521 at both ends of the telescopic support 5 against the two side walls of the backwash water channel, which plays a role in limiting and fixing the sampling basket 10. The operation is simple and convenient.

[0055] Please see Figure 2 In some embodiments, the outer sleeve 51 can be connected to the back of the sampling basket 10 by welding a first connecting ring 53 fixed to the frame 1. The outer end face of the first stop 511 can slightly extend beyond the side of the sampling basket 10 to ensure that the outer end face of the first stop 511 can stably contact the side wall of the water channel after the sampling basket 10 is placed in the water channel. The outer sleeve 51 can be fixedly connected to the first connecting ring 53 or movably connected to the first connecting ring 53; this application does not limit this. Preferably, the outer sleeve 51 is movably connected to the first connecting ring 53 so that the outer sleeve 51 can move linearly or rotate relative to the sampling basket 10 under the restriction of the first connecting ring 53.

[0056] The telescopic part 52 can be connected to the back of the sampling basket 10 by welding a second connecting ring 54 fixed to the frame body 1. The telescopic part 52 is movably connected to the second connecting ring 54 so that the telescopic part 52 can move linearly or rotate relative to the outer tube 51 and the sampling basket 10 under the restriction of the second connecting ring 54.

[0057] Please see Figure 3 and Figure 6In some embodiments, the telescopic support 5 further includes a first anti-slip pad 513 and a second anti-slip pad 522. The first anti-slip pad 513 is fixed to the end face of the first stop portion 511 facing away from the telescopic portion 52, that is, the first anti-slip pad 513 is fixed to the outer end face of the first stop portion 511, and the first anti-slip pad 513 is configured to be clamped between the first stop portion 511 and one side wall of the water channel. The second anti-slip pad 522 is fixed to the end face of the second stop portion 521 facing away from the outer sleeve 51, that is, the second anti-slip pad 522 is fixed to the outer end face of the second stop portion 521, and the second anti-slip pad 522 is configured to be clamped between the second stop portion 521 and the other side wall of the water channel.

[0058] The first anti-slip pad 513 and the second anti-slip pad 522 can be made of materials such as rubber and silicone, which can significantly improve the friction between the first stop part 511, the second stop part 521 and the inner wall of the backwash water channel, further improving the stability and reliability of the contact between the two ends of the telescopic support 5 and the two side walls of the backwash water channel, and ensuring the stable operation of the sampling basket 10.

[0059] Please see Figures 1 to 3 In some embodiments, the positioning component 20 further includes a telescopic control member 6, which may be configured as a long rod-shaped structure connected to the telescopic support member 5 along a first direction, i.e., the Z-axis. The telescopic control member 6 extends at least partially upward beyond the sampling basket 10. The telescopic control member 6 is configured to rotate about its own axis. A handle 61 is provided at the upper end of the telescopic control member 6 extending beyond the sampling basket 10 so that the operator can hold the handle 61 and drive the telescopic control member to rotate.

[0060] In conjunction with this, the positioning component 20 also includes a reversing transmission component, which drives the telescopic control component 6 and the telescopic part 52 to convert the rotation of the telescopic control component 6 into linear motion of the telescopic part 52 along the second direction, namely the X-axis.

[0061] During sampling, the sampling basket 10 must first be lowered into the backwash water channel. Then, the length of the telescopic part 52 extending beyond the outer sleeve 51 is manually adjusted so that the first stop 511 and the second stop 521 abut against the side walls of the backwash water channel. After the sampling basket 10 is lowered into place, the operator can manually drive the telescopic control component 6 to rotate from a standing or semi-squatting position. This allows for remote telescopic control of the telescopic part 52 without having to put their hands into the water or the water channel to rotate or pull the telescopic part 52, significantly improving the convenience of adjusting the length of the telescopic support component 5 and increasing the efficiency of the sampling operation.

[0062] Please see Figure 6In some embodiments, the telescopic part 52 is configured as a hollow tubular structure, which is slidably connected to the outer tube 51 through a slide rail or groove structure, so that the telescopic part 52 can reciprocate linearly relative to the outer tube 51 along the second direction, i.e. the X-axis.

[0063] The reversing transmission assembly includes a drive screw 62, a driven gear 7, a transmission lead screw 8, and a nut 9. The drive screw 62 is coaxially mounted on the telescopic control member 6, and at least partially located within the outer sleeve 51. The transmission lead screw 8 is rotatably connected to the outer sleeve 51 via two coaxially arranged bearings 514, allowing the transmission lead screw 8 to rotate about its axis relative to the outer sleeve 51. The driven gear 7 is coaxially sleeved on the transmission lead screw 8 and meshes with the drive screw 62. The nut 9 is threaded onto the transmission lead screw 8. One end of the telescopic part 52 facing the first stop part 511 is movably inserted into the outer sleeve 51 through the telescopic hole 512 and fixedly sleeved on the nut 9.

[0064] In use, the operator holds the telescopic control component 6 and extends it upward to one end of the sampling basket 10, driving the telescopic control component 6 to rotate around the first direction. When the telescopic control component 6 rotates, it drives the driven gear 7 meshing with it to rotate through the drive screw 62, so that the transmission screw 8 is driven to rotate around the second direction under the drive of the driven gear 7. During the rotation of the transmission screw 8, the telescopic part 52 is driven to move linearly along the second direction relative to the outer sleeve 51 through the nut 9, so as to adjust the length of the telescopic support component 5.

[0065] Please see Figure 2 , Figure 3 and Figure 6 In some embodiments, a receiving housing 515 is also fixedly connected to the outer sleeve 51, the receiving housing 515 communicating with the inner cavity of the outer sleeve 51, and the driven gear 7 is received in the receiving housing 515. The telescopic control member 6 is at least partially rotatably connected to the receiving housing 515, and the drive screw 62 is received in the receiving housing 515 and meshes with the driven gear 7.

[0066] Two or more telescopic support members 5 arranged on the upper and lower sides can be synchronously driven by the same telescopic control member 6. That is, two or more drive screws 62 are provided on the telescopic control member 6. The drive screws 62 are arranged on the upper and lower sides and respectively mesh with the driven gears 7 provided in the outer sleeve 51 of the corresponding telescopic support member 5. This allows the length of two or more telescopic support members 5 to be synchronously adjusted through one telescopic control member 6, which helps to reduce the structural complexity of the positioning component 20.

[0067] Understandably, in some other embodiments, the two or more telescopic support members 5 arranged above and below can also be adjusted in length, that is, the telescopic support member 5 and the telescopic control member 6 are connected one-to-one.

[0068] In some other embodiments, the reversing transmission component may also be configured as a bevel gear set for reversing, or other component forms that can realize reversing transmission, which is not limited in this application.

[0069] To prevent the telescopic part 52 from changing position relative to the outer sleeve 51 during sampling, a locking and fixing component (not shown in the figure) can be installed on the frame body 1. When in use, the operator lowers the sampling basket 10 into the backwash water channel and adjusts the length of the telescopic support 5 through the telescopic control component 6. The operator can then lock and fix the telescopic control component 6 to the frame body 1 through the locking and fixing component to prevent the telescopic control component 6 from rotating during sampling, ensuring that the length of the telescopic support 5 does not change and guaranteeing the stable operation of the sampling basket 10.

[0070] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A water channel sampling device for collecting aquatic organisms in a water channel, characterized by, include: A sampling basket (10) is provided with a basket inlet (101) on the side facing upstream of the water flow. The basket inlet (101) is located near the upper part of the sampling basket (10) and is configured to allow aquatic organisms to enter the sampling basket (10) with the water flow. The sampling basket (10) is provided with a barrier net (3) on at least the side facing downstream of the water flow. The barrier net (3) is configured to allow the water flow to pass through and block the aquatic organisms from entering. A positioning component (20) is connected to the sampling basket (10). The positioning component (20) includes at least one telescopic support (5), which is configured to be length-adjustable so that both ends of the telescopic support (5) abut against the two side walls of the water channel.

2. The water channel sampling device of claim 1, wherein, The sampling basket (10) includes: The frame (1) is at least partially fitted to the inner wall of the water channel. The front end of the frame (1) facing the upstream of the water flow is an open structure. The frame (1) has several hollow areas at least on the back facing the downstream of the water flow. The net (3) is fixedly connected to the frame (1) and covers all the hollow areas. A gate (2) is detachably connected to the front end of the frame (1) and can close the lower region of the open structure. The gate (2) and the front end of the frame (1) define the basket entrance (101).

3. The water channel sampling device of claim 2, wherein, The gate (2) is slidably connected to the frame (1), and the gate (2) can reciprocate along a first direction, which is perpendicular to the water flow direction and the width direction of the water channel; When the gate (2) moves up along the first direction, the opening area of ​​the basket inlet (101) gradually decreases, the lower part of the open structure gradually becomes visible and forms a discharge port, which is configured to allow the collected aquatic organisms to be poured out.

4. The water channel sampling device of claim 3, wherein, The sampling basket (10) also includes: A pull-out component is connected to the gate (2) and is used to control the gate (2) to reciprocate along the first direction.

5. The water channel sampling device of claim 2, wherein, The telescopic support member (5) is connected to the frame body (1) along a second direction, which is the same as the width direction of the water channel; the telescopic support member (5) includes: The outer tube (51) has a first stop (511) at one end and a telescopic hole (512) at the other end. Telescopic part (52), one end of which is movably inserted into the outer sleeve (51) through the telescopic hole (512), and the other end of which is provided with a second stop (521); The telescopic portion (52) is configured to adjust the length of its extension from the outer sleeve (51); the first stop portion (511) is configured to abut against one side wall of the water channel, and the second stop portion (521) is configured to abut against the other side wall of the water channel.

6. The water channel sampling device of claim 5, wherein, The telescopic support (5) also includes: The first anti-slip pad (513) is fixed on the end face of the first stop (511) facing away from the telescopic part (52), and the first anti-slip pad (513) is configured to be clamped between the first stop (511) and one side wall of the water channel. The second anti-slip pad (522) is fixed on the end face of the second stop (521) facing away from the outer sleeve (51), and the second anti-slip pad (522) is configured to be clamped between the second stop (521) and the other side wall of the water channel.

7. The water channel sampling device of claim 5, wherein, The telescopic part (52) is threadedly connected to the outer tube (51) so that the length of the telescopic part (52) extending out of the outer tube (51) can be adjusted by rotation. Alternatively, the telescopic part (52) can be slidably connected to the outer tube (51) so that the length of the telescopic part (52) extending out of the outer tube (51) can be adjusted by pulling.

8. The water channel sampling device of claim 5, wherein, The positioning component (20) further includes: A telescopic control member (6) is connected to the telescopic support member (5) along a first direction and extends at least partially upward from the sampling basket (10). The telescopic control member (6) is configured to rotate about its own axis. The first direction is perpendicular to the direction of water flow and the width direction of the water channel. The reversing transmission assembly is a transmission connection between the telescopic control member (6) and the telescopic part (52), used to convert the rotation of the telescopic control member (6) into linear motion of the telescopic part (52) along the second direction.

9. The water channel sampling device of claim 8, wherein, The reversing drive assembly includes: The drive screw (62) is coaxially mounted on the telescopic control component (6); The transmission lead screw (8) is rotatably connected to the outer sleeve (51) along the same axis; The driven gear (7) is coaxially sleeved on the transmission screw (8), and the driven gear (7) meshes with the drive screw (62); Nut (9), threadedly connected to the transmission screw (8); The telescopic part (52) is fixedly sleeved on the nut (9), and the telescopic part (52) is slidably connected to the outer sleeve (51).

10. The water channel sampling device of claim 1, wherein, The basket inlet (101) is at least partially above the water surface; And / or, the top of the sampling basket (10) is provided with a handle (4), which is at least partially above the surface of the water flow.

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