Water replenishing device for fish luring opening of fishway

Abstract

The utility model belongs to the technical field of fish passing buildings of water conservancy and hydropower engineering, and particularly relates to a water replenishing device for a fish luring opening of a fishway. The water replenishing device comprises a fishway fish luring opening, a buoy, a water replenishing main pipe and a plurality of water replenishing branch pipes, the fishway fish luring opening is of a concrete structure, the water replenishing main pipe comprises a main pipe water inlet section, a main pipe pre-buried section and a main pipe water outlet section which are sequentially connected, the main pipe water inlet section is located outside the fishway fish luring opening, the main pipe pre-buried section is located in a fish luring opening bottom plate, and the main pipe water outlet section is located in the fishway fish luring opening bottom plate. The main pipe water outlet section is located on the upper surface of the fish luring opening bottom plate. The tail end of the water outlet section of the main pipe is communicated with a water segregator through a hose; water outlets of the water segregator are connected with water inlets of the water replenishing branch pipes in a one-to-one correspondence manner; the water segregator and the water supplementing branch pipe are both fixedly arranged on the float bowl, and the hose, the water segregator, the water supplementing branch pipe and the float bowl are all located in the fishway fish luring opening. On the premise that the fish luring effect is ensured, construction can be more convenient.

Description

Technical Field

[0001] This utility model belongs to the technical field of fish passage structures in water conservancy and hydropower engineering, specifically relating to a fish passage water supply device for attracting fish. Background Technology

[0002] Fishway inlets typically employ high flow velocities to attract fish, but this velocity must be within the fish's tolerance range—greater than the induced flow velocity but less than the critical flow velocity. Traditional fishway inlets often have low flow velocities, making them ineffective at attracting fish and thus reducing the fish-attracting effect. Therefore, it's necessary to replenish water at the fishway inlets to achieve the required flow velocity and improve fish passage efficiency. Water engineering experience shows that surface water replenishment at fishway inlets yields the best results. Existing fishway inlet replenishment methods generally use fixed water levels, with the outlet at the end of the replenishment pipe not changing with downstream water levels, failing to maintain a constant surface water level and thus hindering optimal fish-attracting performance. For example, Chinese patent document CN205259148U discloses a centralized water replenishment system for fish passage inlets, including a main water replenishment pipe connected to at least one branch water replenishment pipe. The water intake of the main water replenishment pipe draws water from an upstream reservoir, and the outlet of the branch water replenishment pipe is located at the fish passage inlet. The outlet of the branch water replenishment pipe is located in a water replenishment trough at the bottom of the fish passage inlet, and water is replenished by a fixedly installed water replenishment trough.

[0003] To overcome the aforementioned shortcomings, the applicant's earlier patent application—Chinese patent document CN219080243U—discloses a surface water replenishment device for fish passages and fish attractants. This device includes a fish passage and a water replenishment channel within the fish passage. The fish passage has float-limiting grooves on both side walls, with the axis of the float-limiting grooves vertically aligned. The inner cavity of the float-limiting groove is connected to the bottom of the inner cavity of the fish passage. A float is installed within the float-limiting groove. The two sides of the water replenishment channel are fixedly connected to the float via supports. The side walls of the float-limiting groove have through slots allowing the supports to pass through and move up and down. The floats can float up and down with changes in the water level at the fish passage, thereby causing the water replenishment channel to float up and down, ensuring that the water replenishment channel maintains a consistent surface water replenishment effect, thus improving the fish-attracting effect. However, in practical construction, this solution requires complex perforated and slotted structures on both side walls of the fish passage, resulting in inconvenient construction. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a fish passage water replenishment device that is easier to construct while ensuring the fish-attracting effect.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a fishway fish-attracting mouth water replenishment device, including a fishway fish-attracting mouth, a float, a water replenishment main pipe and multiple water replenishment branch pipes. The fishway fish-attracting mouth includes at least a fish-attracting mouth bottom plate and fish-attracting mouth side wall plates located on the left and right sides of the top of the fish-attracting mouth bottom plate. The fishway fish-attracting mouth is made of concrete structure. The water replenishment main pipe includes a main pipe inlet section, a main pipe pre-embedded section and a main pipe outlet section connected in sequence. The main pipe inlet section is located outside the fishway fish-attracting mouth, the main pipe pre-embedded section is located inside the fish-attracting mouth bottom plate, and the main pipe outlet section is located on the upper surface of the fish-attracting mouth bottom plate. The end of the main pipe outlet section is connected to a water distributor through a flexible hose. The outlet of the water distributor is connected to the inlet of the water replenishment branch pipe one by one. The water distributor and the water replenishment branch pipes are all fixedly installed on the float, and the flexible hose, water distributor, water replenishment branch pipes and float are all located inside the fishway fish-attracting mouth.

[0006] A further preferred option is that the water outlet section of the main pipe extends upward at an angle relative to the upper surface of the fish-attracting inlet bottom plate, and the end of the water outlet section of the main pipe points towards the fish inlet near the fish-attracting inlet of the fish passage.

[0007] A further preferred option is that the vertical distance between the bottom of the end of the main pipe outlet section and the upper surface of the fish-attracting mouth plate is 20mm to 30mm.

[0008] A further preferred option is that the main water outlet section has two sections arranged at left and right intervals, and each main water outlet section is connected to a water distributor via a flexible hose.

[0009] A further preferred option is that both ends of the hose are designed to be detachable.

[0010] A further preferred option is: the water divider is located on the rear side of the float, and multiple water supply branches are distributed at intervals on the left and right. The water supply branches pass through the middle of the float in the height direction and extend to the front side of the float. The front side of the float is the side close to the fish inlet of the fish passage.

[0011] A further preferred embodiment is: the pontoon has a reserved hole corresponding to the water supply branch pipe, the water supply branch pipe and the reserved hole are clearance fit, and the water supply branch pipe is fitted with limiting rings at both ends of the reserved hole in the axial direction, and the water supply branch pipe is installed and fixed on the pontoon through the limiting rings.

[0012] A further preferred option is that the relative position of the limiting ring on the water supply branch pipe axis is adjustable.

[0013] A further preferred option is that the limiting ring is an elastic retaining ring.

[0014] The beneficial effects of this utility model are: the float can move up and down with the water level changes of the fish passage and fish inlet, which in turn directly drives the water supply branch pipe to move up and down, ensuring that the water supply branch pipe can always maintain the surface water supply effect, thereby improving the fish attraction effect; and in the specific implementation of this utility model, there is no need to add complex hole and groove structures to the side walls of the fish passage and fish inlet. It is only necessary to pre-embed the water supply main pipe in the bottom plate of the fish inlet during the construction of the fish passage and fish inlet, which improves the convenience of civil construction. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a rear view of the present invention;

[0017] Figure 3 This is a top view of the present invention;

[0018] Figure 4 This is a three-dimensional structural diagram of the pontoon in this utility model;

[0019] Figure 5 This is a top view of the water distributor and water supply branch pipe assembly of this utility model;

[0020] Figure 6 This is a schematic diagram of the water supply pipeline structure in this utility model.

[0021] The components in the diagram are labeled as follows: float 1, water divider 2, water supply main pipe 3, hose 4, water supply branch pipe 5, limiting ring 6, fish passage and fish inlet 7, fish inlet bottom plate 71, and fish inlet side wall plate 72. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Combination Figures 1 to 6As shown, this utility model includes a fishway / fish-attracting inlet 7, a float 1, a main water supply pipe 3, and multiple branch water supply pipes 5. The fishway / fish-attracting inlet 7 includes at least a bottom plate 71 and sidewalls 72 located on the left and right sides of the top of the bottom plate 71 (the left and right directions correspond to the width direction of the fishway / fish-attracting inlet 7). The fishway / fish-attracting inlet 7 is made of concrete. The main water supply pipe 3 includes a main pipe inlet section, a main pipe pre-embedded section, and a main pipe outlet section connected in sequence. The inlet section is located outside the fish passage / fish-attracting opening 7, the pre-embedded section of the main pipe is located inside the bottom plate 71 of the fish-attracting opening, and the outlet section of the main pipe is located on the upper surface of the bottom plate 71 of the fish-attracting opening. The end of the outlet section of the main pipe is connected to the water distributor 2 through the flexible hose 4. The outlet of the water distributor 2 is connected to the inlet of the water supply branch pipe 5 in a one-to-one correspondence. The water distributor 2 and the water supply branch pipe 5 are both fixedly installed on the float 1, and the flexible hose 4, the water distributor 2, the water supply branch pipe 5, and the float 1 are all located inside the fish passage / fish-attracting opening 7. The float 1 can float up and down with the water level changes of the fish passage / fish-attracting opening 7, thereby directly driving the water supply branch pipe 5 to float up and down, ensuring that the water supply branch pipe 5 can always maintain the surface water supply effect, thereby improving the fish-attracting effect. In specific implementation, this utility model only requires that the water supply main pipe 3 be pre-embedded in the bottom plate 71 of the fish passage / fish-attracting opening 7 during construction, which improves the convenience of civil construction. The flexible hose 4 can generally be made of conventional water hose or metal flexible hose. In addition to its function of guiding the flow, another major function of the flexible hose 4 is to accommodate the up-and-down movement of the float 1. The overall routing of the water supply main pipe 3 can be designed reasonably according to the actual situation. It is only necessary to ensure that the pre-buried section of the main pipe is completely located inside the fish-attracting mouth bottom plate 71, and then the connection point of the flexible hose 4 (the water outlet section of the main pipe) is located on the upper surface of the fish-attracting mouth bottom plate 71. The preferred solution is usually to insert the water supply main pipe 3 directly into the fish-attracting mouth bottom plate 71 from the bottom of the left and right sides of the fish passage fish-attracting mouth 7, and then lead it out from the area where the upper surface of the fish-attracting mouth bottom plate 71 is located.

[0024] It is understandable that the water flow direction within the fishway's fish-attracting opening 7 is towards the downstream river channel. Figure 3 The direction shown corresponds to the water flowing forward. Under the action of the water flow, the float 3 will be located downstream of the main pipe outlet section. To ensure reliable connection and fully utilize the adjustment function of the float 1, the main pipe outlet section extends upward at an angle relative to the upper surface of the fish-attracting mouth bottom plate 71, and the end of the main pipe outlet section points towards the fish inlet 7 near the fish passage fish-attracting mouth, which is equivalent to... Figure 3 In the direction shown, the main pipe outlet section is set at an angle facing forward. In order to make full use of the adjustment function of the float 1, the extension height of the main pipe outlet section does not need to be too long. Generally, it is only necessary to meet the connection requirements of the hose 4. The preferred solution is that the vertical distance between the bottom end of the main pipe outlet section and the upper surface of the fish-attracting mouth bottom plate 71 is 20mm to 30mm.

[0025] To ensure a more reliable connection structure, the main water outlet section has two sections arranged at left and right intervals, each connected to the distributor 2 via a flexible hose 4. In this design, the arrangement of the main water inlet section and the pre-buried section is not mandatory. For example, they can be connected to the same inlet section, with a tee fitting installed in the pre-buried section for flow diversion; alternatively, the main water inlet sections can be set independently. For instance, in the embodiment shown in the attached diagram, the main water inlet sections are set independently, with one water supply main pipe 3 entering the fish-attracting inlet bottom plate 71 from the left and another water supply main pipe 3 entering from the right.

[0026] For ease of implementation, both ends of the hose 4 are detachable, meaning that the hose 4 is detachably connected to the main water outlet section and to the distributor 2. The distributor 2 has a pipe connector for connecting the hose 4. After implementing the above structure, the hose 4 can be replaced with a hose of appropriate length according to the actual situation to adjust the position of the float 1 on the water surface, thereby adjusting the position of the fish-attracting water replenishment point.

[0027] To ensure effective fish attraction and water replenishment, the water distributor 2 is located at the rear of the float 1. Multiple water replenishment branch pipes 5 are spaced apart on the left and right sides. The water replenishment branch pipes 5 pass through the middle of the float 1 in the height direction and extend to the front of the float 1. The front of the float 1 is the side closest to the fish inlet 7 of the fish passage. The specific position of the water replenishment branch pipes 5 in the height direction of the float 1 matches the water surface position. The middle position generally refers to the area between the upper and lower ends of the float 1, and may not be the exact center in the height direction.

[0028] For ease of assembly, the float 1 has a pre-drilled hole corresponding to the water supply branch pipe 5. The water supply branch pipe 5 and the pre-drilled hole are fitted with a clearance fit. Limiting rings 6 are fitted onto both ends of the water supply branch pipe 5 at the axial positions of the pre-drilled holes, securing the water supply branch pipe 5 to the float 1. Preferably, the relative position of the limiting rings 6 in the axial direction of the water supply branch pipe 5 is adjustable. This allows for adjustment of the relative positions of the water supply branch pipe 5 and the float 1 in the front-rear direction according to actual conditions, which is beneficial for achieving overall force balance in the water supply system (the limiting rings 6 can adjust the length of the water supply branch pipe 5 extending beyond the front end of the float 1; adjusting the extension length adjusts the gravity at the front end of the device). There are various ways to adjust the limiting rings 6. For example, the limiting rings 6 can be directly screwed onto the outer wall of the water supply branch pipe 5 using a nut; or they can be directly fitted onto the outer wall of the water supply branch pipe 5 using various elastic retaining rings. To reduce manufacturing difficulty, the limiting rings 6 in this invention preferably use elastic retaining rings.

Claims

1. A water supplementing device for fishway fish inducing entrance, comprising a fishway fish inducing entrance (7), a buoy (1), a water supplementing main pipe (3) and a plurality of water supplementing branch pipes (5), the fishway fish inducing entrance (7) at least comprises a fish inducing entrance bottom plate (71) and fish inducing entrance side wall plates (72) located on the top of the fish inducing entrance bottom plate (71) and on both sides thereof, characterized in that: The fish passage and fish-attracting mouth (7) is made of concrete. The water supply main pipe (3) includes a main pipe inlet section, a main pipe pre-embedded section and a main pipe outlet section connected in sequence. The main pipe inlet section is located outside the fish passage and fish-attracting mouth (7), the main pipe pre-embedded section is located inside the fish-attracting mouth bottom plate (71), and the main pipe outlet section is located on the upper surface of the fish-attracting mouth bottom plate (71). The end of the main pipe outlet section is connected to the water distributor (2) through a flexible hose (4). The outlet of the water distributor (2) is connected to the inlet of the water supply branch pipe (5) in a one-to-one correspondence. The water distributor (2) and the water supply branch pipe (5) are both fixedly installed on the float (1), and the flexible hose (4), the water distributor (2), the water supply branch pipe (5) and the float (1) are all located inside the fish passage and fish-attracting mouth (7).

2. The fishway entrance water supplementing device according to claim 1, characterized by: The main pipe outlet section extends upward at an angle relative to the upper surface of the fish-attracting mouth bottom plate (71), and the end of the main pipe outlet section points towards the fish inlet (7) near the fish passage fish-attracting mouth (7).

3. The fishway entrance water supplementing device according to claim 2, characterized in that: The vertical distance between the bottom of the end of the main pipe outlet section and the upper surface of the fish-attracting mouth bottom plate (71) is 20mm to 30mm.

4. The fishway entrance water supplementing device according to claim 1, characterized by: The main water outlet section has two sections arranged at left and right intervals, and each main water outlet section is connected to the water distributor (2) through a hose (4).

5. The fishway entrance water supplementing device according to claim 1, characterized in that: Both ends of the hose (4) are detachable.

6. The fishway entrance water supplementing device according to any one of claims 1 to 5, characterized in that: The water divider (2) is located on the rear side of the float (1). Multiple water supply branches (5) are distributed on the left and right sides at intervals. The water supply branches (5) pass through the middle of the float (1) in the height direction and extend to the front side of the float (1). The front side of the float (1) is the side that is close to the fish inlet (7) of the fish passage.

7. The fishway entrance water supplementing device according to claim 6, characterized in that: The float (1) has a reserved hole corresponding to the water supply branch pipe (5). The water supply branch pipe (5) and the reserved hole are in clearance fit. The water supply branch pipe (5) is fitted with limiting rings (6) at both ends of the reserved hole in the axial direction. The water supply branch pipe (5) is installed and fixed on the float (1) by the limiting rings (6).

8. The fishway entrance water supplementing device according to claim 7, characterized in that: The relative position of the limiting ring (6) in the axial direction of the water supply branch pipe (5) is adjustable.

9. The fishway entrance water supplementing device according to claim 8, characterized in that: The limiting ring (6) is an elastic retaining ring.

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