Fish escape prevention device suitable for water diversion port of midline trunk canal in south-to-north water diversion
By designing a detachable anti-escaping net plate and fish-repelling component fish-escape device at the water divider of the middle channel of the South-to-North Water Diversion Center, the fish escape and blockage problems are solved, ensuring smooth water flow and protecting fish safety.
Patent Information
- Application Number
- CN202422127758.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The problem of fish escape at the water divider of the middle line of the South-to-North Water Diversion Center is complicated, and existing devices are prone to blockage and cannot effectively prevent fish from being injured.
A fish anti-escaping device including an anti-escaping net plate and a positioning frame is designed. The anti-escaping net plate can be detachably installed through the groove assembly on the positioning frame and is equipped with a fish-repellent assembly to drive away the fish and prevent injury from hitting the net.
It has achieved convenient replacement of anti-escaping net boards, solved the problem of blockage, and reduced fish injuries through fish repelling components, ensured smooth water flow, and played the role of fish ecological regulation.
Smart Images
Figure CN223118979U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fish escape prevention devices, in particular to a fish escape prevention device suitable for a water diversion outlet of a middle line main canal of the South-to-North Water Diversion Project. Background Art
[0002] The Middle Route of the South-to-North Water Diversion Project is a long-distance water diversion project that spans multiple climate zones and basins. It flows through the Yangtze River, Huaihe River, Yellow River, and Haihe River basins, and spans the northern tropical zone, warm temperate zone, and temperate zone. It is currently the world's largest inter-basin water diversion project. The Middle Route water transmission trunk line is 1,432 km long, benefiting 19 large and medium-sized cities along the project, effectively alleviating the water shortage in the water-receiving areas of Beijing, Tianjin, Hebei, Henan, etc. It is also a key project for my country to promote the optimal allocation of water resources, build a "four horizontal and three vertical" national backbone water network, and serve major national strategies.
[0003] After the water was delivered to the middle route of the South-to-North Water Diversion Project, a large-scale reservoir and water diversion canal complex artificial ecosystem was formed. In order to maintain the healthy development of the structure and function of the main canal ecosystem and ensure the "sustainable northward delivery of clean water in one channel", the "fish purification" control strategy was proposed. By releasing fish with different feeding habits, the fish community structure is optimized and improved to ensure the safety of water quality.
[0004] However, there are 88 diversion points along the main canal to supply water to the cities along the line. The diversion points play the function of water distribution and scheduling. Their year-round open water supply provides convenience for fish migration and escape. In order to protect fish and play a role in regulating water ecology in the canal, it is necessary to ensure that a certain number of fish survive in the main canal.
[0005] Due to the special hydrological conditions and architectural characteristics of the main canal diversion outlet, the problem of fish escape prevention at the main canal diversion outlet has always been a complex technical difficulty and a problem to be solved. Therefore, a fish escape prevention device suitable for the diversion outlet of the middle route water diversion main canal of the South-to-North Water Diversion Project is designed to solve the problem of fish escape at the diversion outlet and give play to the ecological regulation role of fish in the channel. Summary of the invention
[0006] Based on the above-mentioned prior art, the utility model provides a fish escape prevention device suitable for the water diversion outlet of the middle line main canal of the South-to-North Water Diversion Project. The device has a simple structure and strong practicality. It can not only effectively solve the problem of fish escape at the water diversion outlet of the middle line water diversion canal of the South-to-North Water Diversion Project, but also the anti-escape net plate can be replaced regularly, solving a series of problems caused by the blockage of the anti-escape net plate.
[0007] The technical solution adopted to achieve the above-mentioned purpose of the utility model is:
[0008] A fish escape prevention device applicable to the water diversion outlets of the main canal of the Middle Route of the South-to-North Water Diversion Project, comprising an escape prevention net plate and a positioning frame for detachably installing the escape prevention net plate. The positioning frame is U-shaped, and the bottom of the positioning frame is provided with rows of positioning holes arranged side by side. Each row of positioning holes includes multiple positioning holes. On the inner walls of the left and right sides of the positioning frame, two pairs of guiding grooves assisting the two rows of positioning holes are symmetrically provided. The upper end of each guiding groove penetrates through the top of the positioning frame. On the outer walls of the left and right sides of the escape prevention net plate, guiding convex ribs are symmetrically provided. The bottom of the escape prevention net plate is provided with multiple positioning protrusions. The number of positioning protrusions is equal to the number of positioning holes in each row of positioning holes. The left and right sides of the escape prevention net plate are located inside the left and right sides of the positioning frame. The two guiding convex ribs of the escape prevention net plate are respectively connected with one of the pairs of guiding grooves on the support frame in a matching manner. The bottom of the support frame is located on the bottom of the positioning frame. The positioning protrusions on the escape prevention net plate are engaged in a corresponding row of positioning grooves on the support frame.
[0009] The cross-sections of the said guiding grooves and guiding convex ribs are both semi-circular. The flat surfaces of the two guiding convex ribs are connected to the outer walls of both sides of the escape prevention net plate. The positioning grooves and positioning protrusions are both circular.
[0010] It further includes a pressing beam. The top of the escape prevention net plate is flush with the top of the positioning frame. The pressing beam is located on the top of the escape prevention net plate. The two ends of the pressing beam are located on the top of the positioning frame. The two ends of the pressing beam are fixed to the positioning frame by screws.
[0011] It further includes a fish repelling component. The fish repelling component includes multiple underwater speakers and a speaker mounting plate. The speaker mounting plate is strip-shaped. The multiple underwater speakers are fixedly arranged on the speaker mounting plate at equal intervals along the length direction of the speaker mounting plate. The speaker mounting plate is installed on the middle and lower part of the water-facing side of the escape prevention net plate through fastening bolts, and the speaker mounting plate is horizontally arranged.
[0012] Compared with the prior art, the beneficial effects and advantages of the present utility model are as follows:
[0013] 1. By arranging a positioning frame underwater in this device, two sets of groove components for installing the escape prevention net plate are arranged on the positioning frame. The escape prevention net plate can be conveniently installed and disassembled through the groove components, which can facilitate the regular replacement of the escape prevention net plate and solve the problem that the escape prevention net plate is blocked after long-term use, thus hindering the flow of water.
[0014] 2. This device is provided with a fish repelling component, which can drive the fish upstream of the escape prevention net plate to avoid the problem that the fish are injured when hitting the escape prevention net plate during the process of swimming with the water flow. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic structural diagram of a fish escape prevention device applicable to the water diversion outlets of the main canal of the Middle Route of the South-to-North Water Diversion Project.
[0016] Figure 2 For Figure 1 The schematic structural diagram in the B-B direction in
[0017] Figure 3 This is a schematic diagram of the structure of the anti-escape board.
[0018] Figure 4 It is a structural schematic diagram of the positioning frame.
[0019] Among them, 1-anti-escape mesh plate, 2-positioning frame, 3-guide groove, 4-positioning hole, 5-guide ridge, 6-positioning protrusion, 7-pressure beam, 8-underwater speaker, 9-speaker mounting plate, 10-fastening bolt. DETAILED DESCRIPTION
[0020] The utility model is described in detail below in conjunction with the accompanying drawings.
[0021] The structural schematic diagram of the fish escape prevention device provided in this embodiment and applicable to the water diversion outlet of the middle route main canal of the South-to-North Water Diversion Project is as follows: Figure 1 As shown, it includes an anti-escape net plate 1, a positioning frame 2, a pressure beam 7 and a fish driving component.
[0022] like Figure 2 and Figure 4 As shown, the positioning frame 2 is in a square U-shape, and the role of the positioning frame 2 is to install the anti-escape mesh plate. Two pairs of guide grooves 3 are symmetrically provided on the inner walls on the left and right sides of the positioning frame 2. The cross section of the guide groove 3 is semicircular, and the center of the semicircle is located on the plane where the inner wall on the left or right side of the positioning frame 2 is located. The upper end of each guide groove 3 passes through the top of the positioning frame 2.
[0023] The bottom of the positioning frame 2 is provided with two rows of positioning holes 4 which are complementary to the two pairs of guide grooves 3, and the two rows of positioning holes 4 are arranged side by side. Each row of positioning holes includes a plurality of positioning holes 4, and the positioning holes 4 are circular.
[0024] The cross section of the water diversion port is square, the left and right sides of the positioning frame 2 are fixed to the two side walls of the water diversion port by expansion screws, and the bottom of the positioning frame 2 is fixed to the bottom of the water diversion port by expansion screws. By fixing the positioning frame 2 to the water diversion port, the original method of fixing the anti-escape mesh plate to the water diversion port is replaced, and this method makes the anti-escape mesh plate 1 easy to install and remove. The anti-escape mesh plate 1 is easy to be blocked due to long-term use, and the spare anti-escape mesh plate 1 can be installed and then the previously used anti-escape mesh plate 1 can be removed.
[0025] like Figure 3 As shown, the outer walls on the left and right sides of the anti-escape mesh plate 1 are symmetrically provided with guide ridges 5, the guide ridges 5 are semicircular, and the flat surfaces of the two guide ridges 5 are connected to the outer walls on both sides of the anti-escape mesh plate 1. A plurality of positioning protrusions 6 are provided at the bottom of the anti-escape mesh plate 1, the number of the positioning protrusions 6 is equal to the number of the positioning holes 4 in each row of positioning holes, and the positioning protrusions 6 are circular.
[0026] The anti-escape net plate 1 is located inside the positioning frame 2, and the top of the anti-escape net plate 1 is flush with the top of the positioning frame 2. The left and right outer walls of the anti-escape net plate 1 are in contact with the left and right inner walls of the positioning frame 2. The two guiding ridges of the anti-escape net plate 1 are respectively connected with a pair of guiding grooves 3 on the positioning frame 2 in a matching manner. The bottom of the anti-escape net plate 1 is located on the bottom of the positioning frame 2, and the positioning protrusions 6 on the anti-escape net plate 1 are engaged in a corresponding row of positioning holes 4 in the positioning frame 2.
[0027] The pressing beam 7 is located on the top of the anti-escape net plate 1. The two ends of the pressing beam 7 are located at the two ends of the top of the positioning frame 2, and the two ends of the pressing beam 7 are fixed to the two ends of the top of the positioning frame 2 by screws.
[0028] The fish repelling assembly includes a plurality of underwater speakers 8 and a speaker mounting plate 9. The speaker mounting plate 9 is strip-shaped, and a plurality of underwater speakers 8 are fixedly arranged on the speaker mounting plate 9 at equal intervals along the length direction of the speaker mounting plate 9. The underwater speakers 8 can be installed on the speaker mounting plate 9 by screws or bolts. The speaker mounting plate 9 is installed on the middle and lower part of the water-facing surface of the anti-escape net plate 1 through fastening bolts 10, and the speaker mounting plate 9 is horizontally arranged. By installing a plurality of underwater speakers 8 underwater through the speaker mounting plate 9, the sound emitted by the underwater speakers 8 can drive the fish upstream of the anti-escape net plate 1, avoiding the fish being injured when hitting the anti-escape net plate 1 during the process of swimming with the water flow.
[0029] After the anti-escape net plate 1 is used for a period of time, a lot of garbage will be intercepted on the anti-escape net plate 1, which will cause the anti-escape net plate 1 to be blocked. At this time, only the spare anti-escape net plate 1 needs to be installed on the positioning frame 2 through an idle set of groove components (usually installed by hoisting with a winch), and then the used and blocked anti-escape net plate 1 is disassembled. During the disassembly process, first disassemble the pressing beam 7, then use the winch to pull the anti-escape net plate 1 upwards, disassemble the anti-escape net plate 1 from the positioning frame 2, and finally hoist the anti-escape net plate 1 to a designated place for cleaning.
Claims
1. A fish escape prevention device applicable to the water diversion outlets of the middle route of the South-to-North Water Diversion Project, characterized in that: It includes an anti-escape net plate and a positioning frame for detachably installing the anti-escape net plate. The positioning frame is U-shaped. There are positioning holes arranged side by side at the bottom of the positioning frame. Each row of positioning holes includes multiple positioning holes. On the inner walls of the left and right sides of the positioning frame, two pairs of guiding grooves assisting the two rows of positioning holes are symmetrically provided. The upper end of each guiding groove penetrates through the top of the positioning frame. On the outer walls of the left and right sides of the anti-escape net plate, guiding ridges are symmetrically provided. At the bottom of the anti-escape net plate, multiple positioning protrusions are provided. The number of positioning protrusions is equal to the number of positioning holes in each row of positioning holes. The left and right sides of the anti-escape net plate are located inside the left and right sides of the positioning frame. The two guiding ridges of the anti-escape net plate are respectively connected and matched with one of the pairs of guiding grooves on the supporting frame. The bottom of the supporting frame is located on the bottom of the positioning frame. The positioning protrusions on the anti-escape net plate are engaged in a corresponding row of positioning grooves on the supporting frame.
2. The fish escape prevention device applicable to the water diversion outlets of the main canal of the Middle Route of the South-to-North Water Diversion Project according to claim 1, characterized in that: The cross-sections of the guiding grooves and the guiding ribs are both semi-circular. The flat surfaces of the two guiding ridges are connected to the outer walls on both sides of the anti-escape net plate. The positioning grooves and the positioning protrusions are both circular.
3. The fish escape prevention device applicable to the water diversion outlets of the Middle Route of the South-to-North Water Diversion Project according to claim 1, characterized in that: It further includes a pressing beam. The top of the anti-escape net plate is flush with the top of the positioning frame. The pressing beam is located on the top of the anti-escape net plate. The two ends of the pressing beam are located on the top of the positioning frame. The two ends of the pressing beam are fixed to the positioning frame by screws.
4. The fish escape prevention device applicable to the water diversion outlets of the middle route of the South-to-North Water Diversion Project main canal according to claim 1, characterized in that: It further includes a fish repelling component. The fish repelling component includes multiple underwater speakers and a speaker mounting plate. The speaker mounting plate is strip-shaped. Multiple underwater speakers are fixed to the speaker mounting plate at equal intervals along the length direction of the speaker mounting plate. The speaker mounting plate is installed on the middle and lower part of the water-facing side of the anti-escape net plate through fastening bolts, and the speaker mounting plate is horizontally arranged.