Spiral fishway device with variable water inlet

Abstract

The utility model provides a spiral fishway device with a variable water inlet, which comprises a spiral fishway and a fish guide way, and further comprises a plurality of connecting fishways, the heights of openings of one ends, far away from the spiral fishway, of any two connecting fishways are different, and one ends of the connecting fishways are respectively provided with a gate assembly. The gate assembly comprises a connecting pipe fitting, a gate body and a floating box, the connecting pipe fitting is arranged around an opening in the end, away from the spiral fishway, of the connecting fishway, a water stop disc is arranged at the end, away from the connecting fishway, of the connecting pipe fitting, and the distance between the lower end of the water stop disc and the spiral fishway is smaller than that between the upper end of the water stop disc and the spiral fishway; the gate body is rotationally connected with the lower end of the water stop disc, and the buoyancy tank is arranged on the gate body. The fishway structure solves the technical problem that an existing fishway structure is poor in capacity of adapting to upstream water level changes, and the technical effects that the time for communicating the upstream and the downstream of a dam is prolonged, and the stability of fishway water inflow and aquatic organism swimming is ensured are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy and hydropower engineering, in particular to a spiral fishway device with a variable water inlet. Background Art

[0002] The construction of water-retaining structures on natural river channels will inevitably change the shape of the river and have an impact on the ecological environment of the river, making it difficult for migratory fish to reproduce or hindering the exchange of populations. Therefore, in order to protect fish resources, fish passing facilities need to be set up when building dams.

[0003] The Chinese utility model patent with publication number CN217419537U discloses a spiral lifting fishway structure, including a fishway main structure section arranged on excavated steps at different elevations, the fishway main structure section includes multiple prefabricated spiral tower fishways, the spiral tower fishways are sequentially connected to form the fishway main structure section, and the spiral tower fishways of the fishway main structure sections on two adjacent excavated steps are connected by a fishway connecting section. The above-mentioned spiral lifting fishway structure is used to solve the problem of migratory fish passing upstream through the river-blocking structure, with small footprint, simple structure and convenient construction.

[0004] After the spiral lifting fishway structure disclosed in the above utility model patent is installed, the outlet section of the fishway is connected to the upstream river water, and the outlet section is the outlet for fish migration when the fishway is in use. Since the position of the outlet section is fixed after the fishway is installed, when the water level upstream of the dam changes, the water depth and flow rate of the fishway will change and affect the fish passing efficiency of the fishway, and even affect the connectivity between the upstream and downstream. Reassembling the fishway according to the upstream water level is time-consuming and labor-intensive, so the existing fishway structure has poor ability to adapt to water level changes. Utility Model Content

[0005] In view of the deficiencies existing in the prior art, the utility model provides a spiral fishway device with a variable water inlet, which solves the problem in the prior art that the fishway structure has poor ability to adapt to changes in upstream water levels.

[0006] According to an embodiment of the utility model, a spiral fishway device with a variable water inlet includes a spiral fishway and a fishguide connected to the spiral fishway, and also includes a plurality of connecting fishways respectively connected to the spiral fishways, the openings of any two connecting fishways away from the corresponding ends of the spiral fishway are at different heights, the ends of the connecting fishways away from the spiral fishway are respectively provided with gate assemblies, the gate assemblies include connecting pipe fittings, a gate body and a buoyancy box, the connecting pipe fittings are arranged around the opening of the end of the connecting fishway away from the spiral fishway and are fixedly connected to the connecting fishway, the end of the connecting pipe fitting away from the connecting fishway has a water stop plate, the spacing between the lower end of the water stop plate and the spiral fishway is smaller than the spacing between the upper end of the water stop plate and the spiral fishway, the gate body is rotatably connected to the lower end of the water stop plate and the gate body is in contact with the water stop plate, and the buoyancy box is arranged on the gate body and close to the upper end of the water stop plate.

[0007] Furthermore, the buoyancy box includes a box body, and the gate body is provided with a slot for accommodating the box body, and the box body is provided with a fixing piece that matches the gate body.

[0008] Furthermore, the box body is provided with an upper water inlet and a lower water inlet, the upper water inlet and the lower water inlet are respectively communicated with the internal space of the box body, and the upper water inlet and the lower water inlet are respectively provided with threaded pipe plugs.

[0009] Furthermore, the gate assembly also includes a connecting piece, which includes a bracket arranged on the gate body and a rotating shaft fixedly connected to the bracket. A base is provided at the lower end of the water stop plate and a mounting hole matching the rotating shaft is provided on the base.

[0010] Furthermore, the gate assembly also includes a water stop member, which includes a water seal and a clamping member that fixes the water seal on the water stop plate. The water seal is arranged near the edge of the water stop plate and the water stop plate is provided with a bolt hole that cooperates with the clamping member. The gate body presses the water seal onto the water stop plate.

[0011] Furthermore, the connecting fishway includes a connecting pipe and a resting pool, the bottom of the resting pool is at a height lower than the connecting pipe, and a plurality of horizontal pools are arranged at intervals along the vertical direction in the spiral fishway, and the resting pools are connected to the horizontal pools one by one.

[0012] Furthermore, the connecting pipe fitting includes a connecting pipe body connected to the water stop plate, a first connecting flange is provided at one end of the connecting pipe body away from the water stop plate, and a second connecting flange corresponding to the first connecting flange is provided at one end of the connecting pipe away from the rest pool.

[0013] Furthermore, the spiral fishway also includes a vertical center column and a plurality of spiral bottom plates arranged around the center column, the plurality of spiral bottom plates are arranged at intervals in the vertical direction, the spiral bottom plate is arranged between any two adjacent horizontal pools and connects the two adjacent horizontal pools, and vertical spiral side walls are arranged on opposite sides of the spiral bottom plate.

[0014] Furthermore, a plurality of vertical water-blocking baffles are arranged at intervals on the spiral bottom plate, and the water-blocking baffles are located between the middle column and the spiral side wall. The middle column, the spiral bottom plate, the spiral side wall and the water-blocking baffles form a Tesla valve structure.

[0015] Furthermore, a plurality of fish nest pools and a plurality of lighting groups are provided in the fish guide, and the fish nest pools and the lighting groups are respectively arranged at intervals along the length direction of the fish guide.

[0016] Compared with the prior art, the utility model has the following beneficial effects: by adopting interconnected spiral fishways and fish guides, fish and other aquatic organisms can swim from the downstream of the river to the upstream or from the upstream to the downstream without hindrance all year round, and a plurality of connecting fishways are arranged to connect the upstream or downstream with the spiral fishways, the openings of the connecting fishways at one end away from the spiral fishways are at different heights, and each connecting fishway at one end away from the spiral fishway is respectively provided with a gate assembly that automatically rises and falls with the water level, the gate assembly consists of a connecting pipe fitting fixedly connected to the connecting fishway, a gate body rotatably connected to the water stop disk on the pipe fitting, and a buoyancy box arranged on the gate body, as the upstream water level changes, the gate body located below the water surface keeps in contact with the water stop disk under the action of the buoyancy of the buoyancy box, so that the gate assembly below the water surface is closed and blocks the upstream water from entering the corresponding connecting fishways The fishway is in the fishway to prevent the water flow and water depth in the fishway device from exceeding the limit value. At the same time, the gate body located on the water surface and above the water surface rotates relative to the water stop disc under the action of gravity and buoyancy or gravity to open the gate assembly. At this time, the corresponding connecting fishway is connected with the upstream and maintains smooth water flow in the fishway device, so that the aquatic organisms in the spiral fishway can pass through the corresponding connecting fishway into the upstream water area or the downstream water area, so that the fishway device can adapt to the changes in the upstream water level and maintain long-term smooth connection between the upstream and downstream. It solves the technical problem that the existing fishway structure has poor ability to adapt to changes in the upstream water level, and produces the technical effect of extending the time of connection between the upstream and downstream of the dam, ensuring the stability of water inflow in the fishway and swimming of aquatic organisms, and there is no need for manual, electrical or mechanical adjustment according to the upstream water level, which reduces the difficulty of facility management and reduces manpower operation, which is conducive to saving equipment maintenance and operation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic structural diagram of a spiral fishway device with a variable water inlet according to a first embodiment of the utility model;

[0018] Figure 2 It is a partial structural schematic diagram of a spiral fishway device with a variable water inlet according to the first embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram of a buoyancy box in a spiral fishway device with a variable water inlet according to the first embodiment of the utility model;

[0020] Figure 4 It is a partial structural schematic diagram of the connection between the connecting pipe and the gate body in the spiral fishway device with a variable water inlet according to the first embodiment of the present utility model;

[0021] Figure 5 It is a partial structural schematic diagram of the connection between the connecting pipe fitting and the connecting fishway in the spiral fishway device with a variable water inlet according to the first embodiment of the utility model;

[0022] Figure 6 It is a partial structural schematic diagram of a water stop member in a spiral fishway device with a variable water inlet according to the first embodiment of the utility model;

[0023] Figure 7 It is a structural schematic diagram of another part of the spiral fishway device with a variable water inlet according to the first embodiment of the utility model;

[0024] Figure 8 It is a schematic diagram of the partial structure of the connection between the fishway and the spiral fishway in the spiral fishway device with a variable water inlet according to the first embodiment of the present utility model;

[0025] Fig. 9 It is a schematic structural diagram of a spiral fishway device with a variable water inlet according to the second embodiment of the utility model.

[0026] In the above drawings: 100, gate assembly; 110, gate body; 120, buoyancy box; 121, box body; 122, fixing part; 123, connecting plate; 124, water inlet; 125, water outlet; 130, connecting part; 131, bracket; 132, rotating shaft; 140, connecting pipe fitting; 141, connecting pipe body; 142, supporting part; 143, water stop plate; 144, base; 145, first connecting flange; 150, water stop; 200, connecting fishway; 210, connecting pipe; 220, rest pool; 300, spiral fishway; 310, horizontal pool; 320, spiral bottom plate; 330, water blocking baffle; 340, spiral side wall; 350, center column; 400, fish guide way. DETAILED DESCRIPTION

[0027] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Embodiment 1

[0029] like Figures 1 to 8 As shown, the first embodiment of the utility model proposes a spiral fishway device with a variable water inlet, which is installed on a dam to connect the upstream and downstream water flows of a river, so that aquatic animals such as migratory fish can pass through the dam body, providing a life channel for the migration of aquatic organisms and genetic exchanges between upstream and downstream populations.

[0030] Please refer to Figure 1 and Figure 2The spiral fishway device with a variable water inlet includes a spiral fishway 300 and a fish guide 400 connected to the spiral fishway 300, the spiral fishway 300 and the fish guide 400 are both arranged downstream of the dam and the corresponding end of the fish guide 400 away from the spiral fishway 300 is connected to the riverbed of the downstream water area, the spiral fishway device with a variable water inlet also includes a plurality of connecting fishways 200, the connecting fishways 200 are respectively connected to the spiral fishway 300 and the connecting fishways 200 are respectively connected to the upstream water area through the dam, and the openings of any two of the connecting fishways 200 away from the ends of the spiral fishway 300 are connected to the riverbed of the downstream water area. At different heights, that is, the openings of the multiple connecting fishways 200 away from the spiral fishway 300 are arranged at intervals in the vertical direction in the upstream water area, and the connecting fishways 200 are respectively provided with gate assemblies 100 at the ends away from the spiral fishway 300. The gate assemblies 100 include connecting pipe fittings 140, gate bodies 110 and buoyancy boxes 120, wherein the connecting pipe fittings 140 are arranged around the openings of the connecting fishway 200 away from the spiral fishway 300 and are fixedly connected to the connecting fishway 200, and the connecting pipe fittings 140 are provided with a water stop plate 143 at the end away from the connecting fishway 200. The water stop plate The distance between the lower end of the gate assembly 100 and the spiral fishway 300 is smaller than the distance between the upper end of the water stop plate 143 and the spiral fishway 300. The gate body 110 is rotatably connected to the lower end of the water stop plate 143 and the gate body 110 is fitted with the water stop plate 143. When the gate body 110 is fitted with the water stop plate 143, the angle between the plane where the gate body 110 is located and the vertical direction is an acute angle. The buoyancy box 120 is arranged on the gate body 110 and close to the upper end of the water stop plate 143. When the gate assembly 100 is immersed in water, the buoyancy of the buoyancy box 120 is The gate body 110 remains in contact with the water stop plate 143, and when the gate body 110 is in contact with the water stop plate 143, it is tilted relative to the vertical direction to ensure that the gate assembly 100 closes the corresponding opening of the connecting fishway 200. At this time, the connection between the corresponding connecting fishway 200 and the upstream water area is blocked. When the gate assembly 100 is located on the water surface or above the water surface, the gate body 110 rotates under the combined action of buoyancy and gravity or under the action of gravity to rotate the gate body 110 to open the opening of the connecting fishway 200. At this time, the corresponding connecting fishway 200 is connected to the upstream water area.

[0031] Specifically, after the spiral fishway device with a variable water inlet provided in this embodiment is installed on the dam, aquatic animals in the downstream waters can enter the spiral fishway 300 along the fish guide way 400, and enter the corresponding connecting fishway 200 after climbing to a certain height along the spiral fishway 300. The aquatic animals can then swim along the connecting fishway 200 to pass through the dam and enter the upstream waters, so that the aquatic animals can pass through the dam and move between the downstream waters and the upstream waters. When the water level upstream changes, the gate body located below the water surface remains in contact with the water stop disk 143 under the action of the buoyancy of the float box 120, so that the gate assembly 100 below the water surface is closed and blocks the upstream water from entering the corresponding connecting fishway 200, so as to prevent the water flow rate and water depth in the spiral fishway device with a variable water inlet from exceeding the specified value. At the same time, the gate body 110 located on and above the water surface rotates relative to the water stop disk 143 under the action of gravity and buoyancy or gravity to open the gate assembly 100. At this time, the corresponding connecting fishway 200 is connected with the upstream and maintains smooth water flow in the fishway device, so that aquatic organisms in the spiral fishway 300 can pass through the corresponding connecting fishway 200 into the upstream waters, thereby allowing the spiral fishway device with a variable water inlet to adapt to changes in the upstream water level. The spiral fishway device with a variable water inlet provided in the present embodiment can maintain the connection between the upstream and downstream for a long time and ensure the stability of water inlet into the fishway and the swimming of aquatic organisms. Moreover, after installation, the spiral fishway device with a variable water inlet does not need to be adjusted according to the upstream water level, which effectively reduces the difficulty of facility management and reduces manpower and mechanical operations, and is conducive to saving equipment maintenance and operation costs.

[0032] like Figure 2 and Figure 3 As shown, the buoyancy box 120 includes a box body 121 and a slot for accommodating the box body 121 is provided on the gate body 110, and a fixing member 122 is provided on the box body 121 to match the gate body 110. The buoyancy box 120 includes a hollow box body 121, the size of which is designed according to the buoyancy required when the gate assembly 100 is closed, and the box body 121 can be a box-shaped component of a rubber or steel structure, the gate body 110 adopts a steel frame structure and a slot for accommodating the buoyancy box 120 is provided on the gate body 110, and a fixing member 122 is also provided on the box body 121, and the fixing member 122 is used to fix the box body 121 on the gate body 110 and the fixing member 122 is composed of a connecting plate 123 and bolts to ensure the overall structural stability of the gate assembly 100.

[0033] In detail, the box body 121 is also provided with an upper water inlet 124 and a lower water inlet 125, and the upper water inlet 124 and the lower water inlet 125 are respectively communicated with the internal space of the box body 121. The openings of the upper water inlet 124 and the lower water inlet 125 are respectively provided with threaded pipe plugs to facilitate opening or closing the upper water inlet 124 or the lower water inlet 125, and the box body 121 can be filled with water after the upper water inlet 124 is opened, and the box body 121 can discharge water after the lower water inlet 125 is opened, so that the total weight of the valve body and the buoy 120 can be adjusted according to the gravity required when the gate assembly 100 is opened, so that the gate body 110 can be opened smoothly.

[0034] Please combine Figure 4 and Figure 5 The gate assembly 100 also includes a connecting member 130, which includes a bracket 131 arranged on the gate body 110 and a rotating shaft 132 fixedly connected to the bracket 131. The lower end of the water stop plate 143 is provided with a base 144 and the base 144 is provided with a mounting hole that matches the rotating shaft 132. In order to realize the rotational connection between the gate body 110 and the connecting pipe 140, the lower end of the water stop plate 143 is provided with the base 144 for installing the valve body, and the base 144 is a cantilever structure, and one end of the base 144 is welded to the water stop plate 143, and the other end is bent, and the bent end of the base 144 is provided with the mounting hole, and a stainless steel bushing is arranged in the mounting hole. The bracket 131 is welded or bolted to the gate body 110, and the bracket 131 and the base 144 are connected together through the cooperation of the rotating shaft 132 and the mounting hole, and after the rotating shaft 132 is installed in the mounting hole, its two ends are limited by bushings, so that the gate body 110 and the bracket 131 can rotate around the rotating shaft 132, thereby closing or opening the opening connected to the fishway 200.

[0035] Specifically, a plurality of support portions 142 are provided at intervals along the circumference of the connecting pipe 140 on the outer peripheral wall of the connecting pipe 140, and the support portions 142 are respectively fixedly connected to the water stop disk 143. The water stop disk 143 is welded and fixed to the connecting pipe 140, and a plurality of support portions 142 are provided at intervals along the axial direction of the connecting pipe 140 on the outer peripheral wall of the connecting pipe 140, and are respectively fixedly connected to the water stop disk 143, and the support portions 142 are respectively plate-shaped, so as to enhance the connection strength between the water stop disk 143 and the connecting pipe 140, and ensure the overall structural stability of the gate assembly 100.

[0036] like Figure 5 and Figure 6As shown, the gate assembly 100 further includes a water stop 150, which includes a water seal and a pressing member for fixing the water seal on the water stop plate 143. The water seal is arranged near the edge of the water stop plate 143 and a bolt hole matching the pressing member is arranged on the water stop plate 143. The gate body 110 presses the water seal on the water stop plate 143. The water stop 150 is used to improve the sealing between the gate body 110 and the water stop plate 143. The water stop 150 includes the water seal and the pressing member. The water seal is pressed and fixed on the water stop plate 143 by the pressing member, so that the connection between the water stop 150 and the water stop plate 143 is reliable, so that the water stop 150 is maintained between the gate body 110 and the water stop plate 143 when the gate assembly 100 is closed, and the pressing member includes a pressure plate, bolts, nuts, gaskets and other components.

[0037] like Figure 7 and Figure 8 As shown, the connecting fishway 200 includes a connected connecting pipe 210 and a resting pool 220, the bottom surface of the resting pool 220 is at a height lower than the height of the connecting pipe 210, and a plurality of horizontal pools 310 are arranged at intervals along the vertical direction in the spiral fishway 300, and the resting pools 220 are connected to the horizontal pools 310 one by one. The connecting fishway 200 includes the connecting pipe 210 buried inside the dam and a resting pool 220 connected to the connecting pipe 210. One end of the connecting pipe 210 is connected to the connecting pipe 140, and the other end is overlapped with the resting pool 220. The resting pool 220 adopts an open rectangular structure, and the inner bottom surface of the resting pool 220 is lower than the connecting pipe 210, so that the resting pool 220 can be used as an intermediate resting place for aquatic organisms during migration. The outlet of the resting pool 220 is connected to the horizontal pool 310 of each layer of the spiral fishway 300, so that aquatic organisms can safely move from the spiral fishway 300 to the connecting fishway 200 during the migration process.

[0038] In detail, the connecting pipe 140 includes a connecting pipe body 141 connected to the water stop plate 143, and a first connecting flange 145 is provided at one end of the connecting pipe body 141 away from the water stop plate 143, and a second connecting flange matched with the first connecting flange 145 is provided at one end of the connecting pipe 210 away from the resting pool 220. The connecting pipe body 141 is combined with the connecting pipe 210 by matching the first connecting flange 145 with the second connecting flange, ensuring a reliable connection between the connecting pipe body 141 and the connecting pipe 210, facilitating the assembly of the spiral fishway device with a variable water inlet, and enabling aquatic organisms to move smoothly from the connecting pipe 210 to the connecting pipe body 141, which is beneficial to improving the reliability of the spiral fishway device with a variable water inlet.

[0039] Please refer to Figure 1 and Figure 8 The spiral fishway 300 also includes a vertical center column 350 and a plurality of spiral bottom plates 320 arranged around the center column 350. The plurality of spiral bottom plates 320 are arranged at intervals in the vertical direction. The spiral bottom plate 320 is arranged between any two adjacent horizontal pools 310 and connects the two adjacent horizontal pools 310, and vertical spiral side walls 340 are arranged on opposite sides of the spiral bottom plate 320. The lower part of the middle column 350 extends into the riverbed or is integrated with the dam, and the middle column 350 is located at the center of the spiral fishway 300 to keep the position of the spiral fishway 300 on the dam stable, and the spiral bottom plate 320 adopts a spiral structure surrounding the middle column 350, and the multiple spiral bottom plates 320 arranged on the middle column 350 from top to bottom adopt the same spiral slope ratio and inner diameter size, and vertical spiral side walls 340 are respectively arranged on the opposite sides of the spiral bottom plate 320 to limit the water flow in the spiral fishway 300, and a certain interval is left between the upper and lower spiral side walls 340 for ventilation, so that the interior of the spiral fishway 300 can receive a certain amount of light.

[0040] In detail, a plurality of vertical water-blocking baffles 330 are spaced apart on the spiral bottom plate 320 and the water-blocking baffles 330 are located between the middle column 350 and the spiral side wall 340 . The middle column 350 , the spiral bottom plate 320 , the spiral side wall 340 and the water-blocking baffles 330 form a Tesla valve structure. By arranging a plurality of V-shaped water-blocking baffles 330 on the spiral bottom plate 320 and forming a Tesla valve structure in the spiral fishway 300, the water flow in the spiral fishway 300 is dissipated, so that the aquatic organisms entering the spiral fishway 300 can migrate from the area with a lower water flow velocity, reduce the physical energy consumption of the aquatic organisms during the swimming process, and help increase the success rate of the aquatic organisms' migration. The water-blocking baffles 330 can be cast as a whole with the spiral bottom plate 320, or can be fixedly installed on the spiral bottom plate 320 by bolts. When the water-blocking baffles 330 are fixedly installed by bolts, the angles of each water-blocking baffle 330 can be adjusted by rotating the water-blocking baffles 330, so as to adjust the Tesla valve structure in the spiral fishway 300 according to the actual use scenario, thereby improving the versatility of the spiral fishway device with a variable water inlet.

[0041] Embodiment 2

[0042] like Fig. 9 As shown, the second embodiment of the utility model is another technical solution for the arrangement of the spiral fishway device with a variable water inlet based on the first embodiment, and the difference from the first embodiment is only that the arrangement of the spiral fishway device with a variable water inlet on the dam is different.

[0043] Please refer to Fig. 9 In this embodiment, the spiral fishway device with a variable water inlet includes a spiral fishway 300 and a fishguide way 400 connected to the spiral fishway 300, the spiral fishway 300 and the fishguide way 400 are both arranged upstream of the dam and the fishguide way 400 is located at the bottom of the spiral fishway 300, the end of the fishguide way 400 away from the spiral fishway 300 passes through the dam and is connected to the riverbed of the downstream water area, the spiral fishway device with a variable water inlet also includes a plurality of connecting fishways 200, both ends of the connecting fishways 200 are respectively connected to the spiral fishway 300 and the upstream water area, and the openings of the plurality of connecting fishways 200 away from the end of the spiral fishway 300 are arranged at intervals in the vertical direction in the upstream water area, and the ends of the connecting fishways 200 away from the spiral fishway 300 are respectively provided with gate assemblies 100. The spiral fishway device with a variable water inlet provided in this embodiment only needs to provide one fish guide 400 passing through the dam body in the dam body, thereby effectively reducing the difficulty of construction.

[0044] Specifically, the fish guide 400 is provided with a plurality of fish nest pools and a plurality of lighting groups, and the fish nest pools and the lighting groups are arranged at intervals along the length direction of the fish guide 400. Since the length of the fish guide 400 in the dam body is relatively long, migrating aquatic organisms need to travel a long distance in the fish guide 400, so a plurality of the fish nest pools are arranged at intervals in the fish guide 400 for aquatic organisms to rest. A plurality of the lighting groups are arranged in the fish guide 400 to guide aquatic organisms to move in the fish guide 400, ensuring that aquatic organisms entering the fish guide 400 can migrate from the downstream waters to the upstream waters or from the upstream to the downstream waters along the spiral fishway device with a variable water inlet.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A spiral fishway device with a variable water inlet, comprising a spiral fishway and a fish guide communicating with the spiral fishway, characterized in that: It also includes a plurality of connecting fishways respectively connected with the spiral fishway, the openings of any two connecting fishways at the corresponding ends away from the spiral fishway are at different heights, a gate assembly is respectively provided at the end of the connecting fishway away from the spiral fishway, the gate assembly includes a connecting pipe, a gate body and a buoyancy box, the connecting pipe is arranged around the opening of the end of the connecting fishway away from the spiral fishway and is fixedly connected to the connecting fishway, the connecting pipe has a water stop plate at the end away from the connecting fishway, the spacing between the lower end of the water stop plate and the spiral fishway is smaller than the spacing between the upper end of the water stop plate and the spiral fishway, the gate body is rotatably connected to the lower end of the water stop plate and the gate body is in contact with the water stop plate, and the buoyancy box is arranged on the gate body and close to the upper end of the water stop plate.

2. A spiral fishway device with a variable water inlet as claimed in claim 1, characterized in that: The buoyancy box comprises a box body, and a slot for accommodating the box body is provided on the gate body, and a fixing piece matched with the gate body is provided on the box body.

3. A spiral fishway device with a variable water inlet as claimed in claim 2, characterized in that: The box body is also provided with an upper water inlet and a lower water inlet, the upper water inlet and the lower water inlet are respectively communicated with the internal space of the box body, and the upper water inlet and the lower water inlet are respectively provided with a threaded pipe plug.

4. A spiral fishway device with a variable water inlet as claimed in claim 1, characterized in that: The gate assembly also includes a connecting piece, which includes a bracket arranged on the gate body and a rotating shaft fixedly connected to the bracket. The lower end of the water stop plate is provided with a base and the base is provided with a mounting hole matching the rotating shaft.

5. A spiral fishway device with a variable water inlet as claimed in claim 1, characterized in that: The gate assembly also includes a water stop, which includes a water seal and a clamping member that fixes the water seal on the water stop plate. The water seal is arranged close to the edge of the water stop plate and the water stop plate is provided with a bolt hole that matches the clamping member. The gate body presses the water seal on the water stop plate.

6. A spiral fishway device with a variable water inlet as claimed in claim 1, characterized in that: The connecting fishway includes a connecting pipe and a resting pool, the bottom surface of the resting pool is at a height lower than the connecting pipe, a plurality of horizontal pools are arranged at intervals along the vertical direction in the spiral fishway, and the resting pools are connected to the horizontal pools one by one.

7. A spiral fishway device with a variable water inlet as claimed in claim 6, characterized in that: The connecting pipe comprises a connecting pipe body connected to the water stop plate, a first connecting flange is arranged at one end of the connecting pipe body away from the water stop plate, and a second connecting flange corresponding to the first connecting flange is arranged at one end of the connecting pipe away from the rest pool.

8. A spiral fishway device with a variable water inlet as claimed in claim 6, characterized in that: The spiral fishway also includes a vertical central column and a plurality of spiral bottom plates arranged around the central column. The plurality of spiral bottom plates are arranged at intervals in the vertical direction. The spiral bottom plate is arranged between any two adjacent horizontal pools and connects the two adjacent horizontal pools, and vertical spiral side walls are arranged on opposite sides of the spiral bottom plate.

9. A spiral fishway device with a variable water inlet as claimed in claim 8, characterized in that: A plurality of vertical water-blocking baffles are arranged at intervals on the spiral bottom plate, and the water-blocking baffles are located between the middle column and the spiral side wall. The middle column, the spiral bottom plate, the spiral side wall and the water-blocking baffles form a Tesla valve structure.

10. The spiral fishway device with a variable water inlet as claimed in claim 1, characterized in that: A plurality of fish nest pools and a plurality of lighting lamp groups are arranged in the fish guide way, and the fish nest pools and the lighting lamp groups are respectively arranged at intervals along the length direction of the fish guide way.

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