Spur dike type fishway inlet

Abstract

A spur dike type fishway inlet includes an upstream flow block wall, an extra water supply nozzle, and an artificial fish reef. The upstream flow block wall is arranged upstream of a fishway inlet; the starting end of the upstream flow block wall is connected with the upstream side wall of the fishway inlet through a connecting shaft and a hydraulic strut. The extra water supply nozzle is installed in the fishway inlet and is connected to the upstream of a power station through a pipeline to directly supply water to a high water head. The artificial reef is set up within the shielding range of the upstream flow block wall.

Claims

1. A spur dike type fishway inlet comprising: an upstream flow block wall; an extra water supply nozzle; and an artificial reef, wherein the upstream flow block wall is arranged upstream of the fishway inlet, wherein a starting end of the upstream flow block wall is connected with an upstream side wall of the fishway inlet through a connecting shaft and a hydraulic strut, wherein the extra water supply nozzle is installed in the fishway inlet, wherein the artificial reef is set up within a sheltered area of the upstream flow block wall, wherein the upstream flow block wall is a floating bulkhead gate, the floating bulkhead gate comprising: a floating bulkhead body; a set of filling and draining devices; and a set of fish attracting devices, wherein the filling and draining devices are installed in the floating bulkhead body, wherein the connecting shaft is coupled to one end of the floating bulkhead body, and a fixing foot is coupled to a bottom of an other end of the floating bulkhead body, wherein an outlet of the extra water supply nozzle faces the fishway inlet, and wherein the artificial reef is arranged near the fishway inlet and downstream of the flow block wall, which is conducive to a formation of near-natural water flow to attract fish into the fishway inlet, and for fish to rest.

2. The spur dike type fishway inlet according to claim 1, wherein the fish attracting devices comprises: two reels and a ring grid, wherein the ring grid is sleeved on the reels, wherein both ends of the said two reels are rotatable fixed on a downstream surface of the floating bulkhead body respectively, wherein the ring grid is a vertical striped plastic mesh, and stripe colors are black and white, wherein an upper end of the reels on a side of the connecting shaft is equipped with a motor, which pushes the reels to rotate, wherein when the reels rotate, the reels drive the ring grid to rotate at the same time.

3. The spur dike type fishway inlet according to claim 1, wherein the floating bulkhead body is further provided with a vortex elimination grille.

Description

DESCRIPTION OF THE DRAWINGS

(1) The following drawings are only for the purpose of description and explanation but not for limitation.

(2) FIG. 1 is the overall schematic diagram that the present invention is installed at the fishway inlet.

(3) FIG. 2 is a schematic top view of the upstream flow block wall of the present invention.

(4) FIG. 3 is an overall schematic diagram of the upstream flow block wall of the present invention.

(5) FIG. 4 is a schematic view of the upstream flow block wall of the present invention viewed from the downstream direction.

(6) FIG. 5 is a schematic cross-sectional view of the longitudinal centerline of the upstream flow block wall of the present invention.

(7) FIG. 6 is a schematic diagram of the installation of a vortex elimination grille of a spur dike type fishway inlet according to the present invention.

DESCRIPTION OF PREFERRED EMBODIMENT

(8) The present invention will be further described below with reference to specific embodiments, but the protection scope of the present invention is not limited thereto.

Example 1

(9) Referring to FIG. 1 showing a spur dike type fishway inlet, which includes the following contents: an upstream flow block wall 1, an extra water supply nozzle 2, and an artificial reef 3.

(10) Spur dike is widely used in riverbank protection from erosion. It produces a field of nearly still water directly downstream of itself. The spur dike type fishway inlet of the present invention is used upstream of the fishway inlet to cover the entry.

(11) The above-mentioned upstream flow block wall 1 is arranged upstream of a fishway inlet. The starting end of the upstream flow block wall 1 is connected with the upstream side wall of the fishway inlet through a connecting shaft 11 and a hydraulic strut 12. The hydraulic strut 12 is supported between the upstream flow block wall 1 and the upstream side wall. The extra water supply nozzle 2 is installed in the fishway inlet and is connected to the upstream of a power station through a pipeline to directly supply water to a high water head. The artificial fish reef 3 is set up with the shielded area of the upstream flow block wall 1.

(12) The above-mentioned upstream flow block wall 1 is a floating bulkhead gate, which comprises: a floating bulkhead body, a set of filling and draining devices, and a set of fish attracting devices.

(13) As shown in FIG. 3 and FIG. 5, the filling and draining devices includes: a filling and draining pipe 13 and a filling and draining pump 14. The filling and draining pipe 13 and the filling and draining pump 14 are installed in the floating bulkhead body. One end of the floating bulkhead body is installed with the connecting shaft 11, and the bottom of the other end is installed with a fixing foot 15.

(14) As shown in FIGS. 2 and 4, the above-mentioned fish attracting devices include: two reels 51 and a ring grid 52. The ring grid 52 is sleeved on the reels 51, and both ends of the said two reels 51 are rotatable fixed on the downstream surface of the floating bulkhead body respectively.

(15) The ring grid 52 is a vertical striped plastic mesh, and the stripe color is black and white.

(16) A motor 53 is installed on the upper end of the reel 51 on the side of the connecting shaft 11, which pushes the reels 51 to rotate. When the reel 51 rotates, it drives the ring grid 52 to rotate at the same time. When the nearby fish see the ring grid 52 rotating, their mechanism of the keeping target stability in the flow will play a role, and it will move follow the movement direction of the ring grid 52.

(17) The outlet of the extra water supply nozzle 2 faces the fishway inlet, and the pipeline is provided with a control valve to control the flow.

(18) The artificial reef 3 is arranged near the fishway inlet and downstream of the flow block wall, which is conducive to the formation of near-natural water flow to attract fish into the fishway, and for fish to rest.

Example 2

(19) Except for the following contents, the other parts in this embodiment are the same as in Embodiment 1.

(20) In this embodiment, the elevation of the bottom of the orifice of the filling and draining pipe 13 is located at the historical lowest water level downstream of the hub.

Example 3

(21) Except for the following contents, the other parts in this embodiment are the same as in Embodiment 1.

(22) In the present embodiment, as shown in FIG. 6, a vortex elimination grille 41 is also installed at the end of the floating bulkhead body, and the vortex elimination grille 41 is connected to the floating bulkhead body through a hinge 42. The size of the vortex elimination grille 41 is: the height is 1.2 m, the width is 1.4 m, and the fixed top elevation is the average water level in the downstream flood season of 1.2 m. The grid holes of the vortex elimination grille 41 are square, the side length is 2 cm-5 cm, and the thickness of the grid holes is 2 cm-3.2 cm. Because the local flow direction was changed by the spur dike and the vortexes are produced at the end of the dike, which attracts fish to stop over and puzzle in the vortexes. The vortex elimination grille can be used to eliminate the vortex and reduce the fish residence time.

(23) The above-mentioned vortex elimination grille 41 is a stainless steel grid mesh. The hinge shaft 43 is riveted to the vortex elimination grille 41, and the riveting place is reinforced. At the downstream end of the upstream flow block wall 11 of the spur dike type fishway inlet, a shackle 46 is riveted on the vortex elimination grid 42, and the support rod 45 is hooked on the shackle 46 with a ring hook.

(24) The other end of the above-mentioned support rod 45 is hooked on the ring hook at the downstream end of the upstream flow block wall 1 of the spur dike type fishway inlet.