A floating pollution-blocking structure for a water inlet of a hydroelectric power station and an implementation method thereof

Abstract

The present invention relates to a floating trash-blocking structure at a water inlet of a hydroelectric power station and an implementation method thereof, and relates to the field of hydraulic engineering. The structure is installed at the water inlet of a water inlet tower, and comprises a trash-blocking row, a blocking net and a slide. The trash-blocking row is formed by splicing a plurality of single-row blocks and is structurally divided into a main row and a side row. The main row is located in front of the water inlet, and the side row is located around the water inlet tower and is movably connected to the slide. The blocking net is suspended on the lower side of the main row, and the slide is fixed on the peripheral wall of the water inlet tower. The single-row structure comprises a plurality of buoys and a steel frame. The trash-blocking structure can adapt to water level changes by sliding the trash-blocking row on the slide. The suspended blocking net can intercept underwater floating objects. The slide and the trash-blocking row, and the single-rows are flexibly connected by steel ropes, and can adapt to operation during the winter ice-covered period and displacement in all directions caused by water surface fluctuations without causing stress concentration. The buoy is made of flexible material and has sufficient deformation to adapt to freezing extrusion force during the freezing period. The structure is simple, safe and reliable.

Description

Technical Field

[0001] The invention relates to the field of hydraulic engineering, and in particular to a floating pollution-blocking structure at a water inlet of a hydroelectric power station and an implementation method thereof. Background Art

[0002] The water velocity of the inlet tower of the hydropower station is about 1m / s, and the velocity in other areas of the reservoir is basically 0. The floating objects on the surface of the reservoir drift towards the water intake tower under the action of wind. Affected by the streamline of the water intake, the floating objects near the water intake will flow into the water intake tower with the flow field, and then enter the turbine unit, affecting the performance of hydropower generation. Therefore, it is necessary to set up a sewage dump at the water intake.

[0003] Traditional floating barrier is fixed on the mountains on both sides of the water inlet, or directly fixed on both sides of the reservoir. The single buoys are connected in series by steel wire ropes to intercept floating objects on the surface of the reservoir. In order to adapt to the fluctuation of the reservoir water level, a winch is set at the fixed point. When the water level of the reservoir changes, the length of the steel wire rope needs to be manually adjusted to ensure that the floating barrier structure always floats on the surface of the reservoir. However, due to the influence of upstream water and scheduling during the operation of the power station, the frequency and amplitude of water level changes cannot be determined in time. If the winch cannot be adjusted manually in time, the floating barrier may be dragged away from the water surface, and some of the intercepted floating objects will break through the defense line and enter the water inlet of the power station. In addition, the floating barrier may pull out the fixed point or break the main cable under the action of gravity. In addition, the traditional floating barrier can only intercept floating objects on the surface of the reservoir, affecting the navigation of ships in the reservoir. Especially in winter, water facilities (including the sewage barrier) are often damaged by freezing, and the floating buoys will be subjected to freezing extrusion force, causing the floating buoys to be damaged, thus causing the sewage barrier to fail. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a floating pollution-blocking structure that can adapt to water levels, intercept underwater floating objects and adapt to the winter ice period, and an implementation method for installing it in front of a water inlet.

[0005] The object of the present invention is achieved through the following technical solution: a floating trash-blocking structure for the water inlet of a hydroelectric power station, installed at the water inlet of a water inlet tower, comprising a trash-blocking row, a blocking net and a slide; wherein:

[0006] The trash row is an "E"-shaped structure formed by splicing multiple single rows, and its structure is divided into a main row and a side row. The main row is located in front of the water inlet, and the side row is located around the water inlet tower and is movably connected to the slide; the blocking net is suspended on the lower side of the main row; the single row includes multiple buoys and a steel frame, and the buoys are fixed on the inside of the steel frame; the two adjacent single rows are flexibly connected by steel ropes and a certain reserved gap is set between the single rows; the slide is fixed on the surrounding wall of the water inlet tower; the buoy is a cylindrical structure made of flexible material.

[0007] Preferably, the buoy has its own connecting fasteners, and the buoys are connected to each other via the connecting fasteners.

[0008] Preferably, a sleeve and fixing ribs are provided between the peripheral wall of the water inlet tower and the slide, and a reserved hole for inserting the fixing rib is provided on the sleeve; one end of the fixing rib is placed inside the peripheral wall of the water inlet tower and fixedly connected to the water inlet tower, and the other end of the fixing rib is placed in the reserved hole and fixedly connected to the sleeve by welding; an anti-slip pin is provided at one end of the slide, and a limiter is provided at the other end of the slide, the trash row moves between the anti-slip pin and the limiter, and the trash row is movably connected to the slide by a steel rope; the anti-slip pin is connected to the uppermost end of the sleeve.

[0009] Preferably, it also includes a net frame, the blocking net is placed in the net frame and fixedly connected to the net frame; the net frame is fixed to the lower side of the trash drain.

[0010] A method for implementing a floating trash-blocking structure at a water inlet of a hydroelectric power station comprises the following steps:

[0011] S1: Arrange the buoys neatly and connect them into a whole through connecting fasteners, then place the buoys connected as a whole into a steel frame and fix them by welding to complete the single-row assembly;

[0012] S2: transport the assembled single-row to the water inlet and place it in a suitable position as a temporary platform for the staff to operate on the water surface, then transport the second single-row to a suitable position, and connect the two single-rows flexibly with steel ropes;

[0013] S3: Repeat S2 until all the single rows are assembled to form a trash row;

[0014] S4: The sleeve and the fixing ribs are welded, and the fixing ribs are inserted into the peripheral wall of the water intake tower and fixed, so that the sleeve is vertically fixed on the peripheral wall of the water intake tower;

[0015] S5: Insert the slide into the sleeve, and fix one end of the slide to one end of the sleeve by means of a slide-stop pin, so that there is a gap between the outer wall of the slide and the inner wall of the sleeve; then weld a stopper at the other end of the slide;

[0016] S6: movably connecting the side row of the trash can to the slideway through a steel rope;

[0017] S7: Hang the screen under the main row of the trash can to complete the installation of the entire trash can structure.

[0018] The present invention has the following advantages:

[0019] 1. The trash trap of the present invention is mounted on the water intake tower body and can be regarded as a part of the water intake tower. It is integrated with the water intake tower to intercept floating objects. The overall effect is beautiful and can be used as a dock and maintenance platform.

[0020] 2. The present invention has a small amount of engineering work and is simple and easy to install. When the slag on the barrier is removed, it can be transported to the entrance of the spillway, and the water-facing and water-receiving surfaces can be turned around. The small opening of the spillway can be used to discharge flood water and flush away the slag on the lower barrier.

[0021] 3. The present invention can adapt to water level changes by sliding the wastegate on the slideway;

[0022] 4. The suspended blocking net of the present invention can intercept underwater floating objects;

[0023] 5. In the present invention, the slideway and the trash row, and the single row and the single row are flexibly connected by steel ropes, which can adapt to the operation during the winter ice period and the directional displacement caused by the water surface fluctuation, without causing stress concentration;

[0024] 6. The float in the present invention is made of flexible material and has sufficient deformation to adapt to the freezing squeezing force generated during the freezing period. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the installation of the slideway in the present invention;

[0026] Figure 2 Schematic diagram of the sleeve structure in the embodiment;

[0027] Figure 3 It is a schematic diagram of the connection between the intercepting net and the trash drain in the present invention;

[0028] Figure 4 This is a schematic diagram of the installation of the trash can of the present invention;

[0029] Figure 5 This is a schematic diagram of a single-row structure of the present invention;

[0030] In the figure: 1-water intake tower; 2-anti-slip pin; 3-sleeve; 4-fixing rib; 5-slide; 6-trash row; 601-main row; 602-side row; 7-limiter; 8-reserved hole; 9-steel frame; 10-single row; 11-net; 12-net frame; 13-buoy. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a floating trash-blocking structure for the water inlet of a hydroelectric power station is installed at the water inlet of a water inlet tower 1, and includes a trash-blocking row 6, a blocking net 11 and a slide 5, wherein:

[0033] The trash row 6 is an "E"-shaped structure formed by splicing 13 single rows 10, and its structure is divided into a main row 601 and a side row 602. The main row 601 is located in front of the water inlet, and the side row 602 is located around the water inlet tower 1 and is movably connected to the slide 5; the blocking net 11 is suspended on the lower side of the main row 601; the single row 10 includes 32 pontoons 13 and a steel frame 9, and the pontoons 13 are fixed on the inner side of the steel frame 9; the two adjacent single rows are flexibly connected by steel ropes and a certain reserved gap is provided between the single rows, and the reserved gap can adapt to the operation during the winter ice period and the directional displacement caused by water surface fluctuations without causing stress concentration; the slide 5 is fixed on the surrounding wall of the water inlet tower 1; the pontoon 13 is a cylindrical structure made of flexible material, and has sufficient deformation to adapt to the freezing extrusion force generated during the freezing period.

[0034] Preferably, the buoy 13 has its own connecting fasteners, and the buoys 13 are connected to each other through the connecting fasteners.

[0035] Preferably, a sleeve 3 and a fixing rib 4 are provided between the peripheral wall of the water inlet tower 1 and the slide 5, and a reserved hole 8 for inserting the fixing rib 4 is provided on the sleeve 3; one end of the fixing rib 4 is placed inside the peripheral wall of the water inlet tower 1 and fixedly connected to the water inlet tower 1, and the other end of the fixing rib 4 is placed in the reserved hole 8 and fixedly connected to the sleeve 3 by welding; an anti-slip pin 2 is provided at one end of the slide 5, and a limiter 7 is provided at the other end of the slide 5; the trash blocking row 6 moves between the anti-slip pin 2 and the limiter 7, and the trash blocking row 6 is movably connected to the slide 5 by a steel rope, and the steel rope is lassoed on the slide 5; the anti-slip pin 2 is connected to the uppermost end of the sleeve 3 to prevent the slide 5 from sliding in the sleeve 3.

[0036] Preferably, it further comprises a net frame 12 , wherein the blocking net 11 is placed inside the net frame 12 and fixedly connected to the net frame 12 ; the net frame 12 is fixed to the lower side of the trash drain 6 .

[0037] Preferably, the slideway 5 is a steel pipe installed in a vertical direction, and the parameters of the steel pipe are a diameter of 50 mm and a thickness of 3 mm.

[0038] Preferably, a rectangular steel plate is further provided, the reserved hole 8 is provided on the rectangular steel plate, and the sleeve 3 is fixed on the center line of the rectangular steel plate.

[0039] Preferably, in order to facilitate anti-corrosion treatment, the steel frame 9 and the mesh frame 12 are made of angle steel or flat steel.

[0040] Preferably, the blocking net 11 is made of stainless steel, the depth of the blocking net 11 depends on the working conditions, the mesh aperture is less than 3 cm, and the blocking net 11 is fixed in the net frame 12 with rivets.

[0041] A method for implementing a floating trash-blocking structure at a water inlet of a hydroelectric power station by installing it at the water inlet of a water inlet tower 1 comprises the following steps:

[0042] S1: Arrange the buoys 13 neatly and connect them into a whole through connecting fasteners, then place the buoys 13 connected as a whole into the steel frame 9 and fix them by welding, completing the single row 10 assembly;

[0043] S2: transporting the assembled single-row 10 to the water inlet and placing it in a suitable position as a temporary platform for the staff to operate on the water surface, then transporting the second single-row 10 to a suitable position, and flexibly connecting the two single-row 10 with steel ropes;

[0044] S3: Repeat S2 until all the single rows are assembled to form a trash row 6;

[0045] S4: The sleeve 3 and the fixing rib 4 are welded, and the fixing rib 4 is inserted into the peripheral wall of the water intake tower 1 and fixed, so that the sleeve 3 is vertically fixed on the peripheral wall of the water intake tower 1;

[0046] S5: insert the slideway 5 into the sleeve 3, and fix one end of the slideway 5 to one end of the sleeve 3 through the anti-slip pin 2, so that there is a gap between the outer wall of the slideway 5 and the inner wall of the sleeve 3; then weld the limiter 7 at the other end of the slideway 5;

[0047] S6: movably connect the side row 602 of the trash drain 6 to the slideway 5 through a steel rope;

[0048] S7: Hang the blocking net 11 on the lower side of the main row 601 of the trash-blocking row 6 to complete the installation of the entire trash-blocking structure.

Claims

1. A floating trash-blocking structure for a water inlet of a hydroelectric power station, installed at the water inlet of a water inlet tower (1), characterized in that: It comprises a trash can (6), a screen (11) and a slideway (5); wherein: The trash row (6) is an "E"-shaped structure formed by splicing a plurality of single rows (10), and its structure is divided into a main row (601) and a side row (602), wherein the main row (601) is located in front of the water inlet, and the side row (602) is located around the water inlet tower (1) and is movably connected to the slideway (5); the blocking net (11) is suspended on the lower side of the main row (601); the single row (10) includes a plurality of buoys (13) and a steel frame (9), and the buoys (13) are fixed on the inner side of the steel frame (9); two adjacent single rows are flexibly connected by steel ropes, and a certain reserved gap is provided between the single rows; the slideway (5) is fixed on the peripheral wall of the water inlet tower (1); the buoys (13) are cylindrical structures made of flexible materials; The buoy (13) is provided with a connecting fastener, and the buoys (13) are connected to each other via the connecting fastener; A sleeve (3) and a fixing rib (4) are provided between the peripheral wall of the water inlet tower (1) and the slideway (5), and a reserved hole (8) for inserting the fixing rib (4) is provided on the sleeve (3); one end of the fixing rib (4) is placed inside the peripheral wall of the water inlet tower (1) and is fixedly connected to the water inlet tower (1), and the other end of the fixing rib (4) is placed in the reserved hole (8) and is fixedly connected to the sleeve (3) by welding; an anti-slip pin (2) is provided at one end of the slideway (5), and a limiter (7) is provided at the other end of the slideway (5); the trash blocking row (6) moves between the anti-slip pin (2) and the limiter (7), and the trash blocking row (6) is movably connected to the slideway (5) by a steel rope; the anti-slip pin (2) is connected to the uppermost end of the sleeve (3).

2. The floating pollution-blocking structure for the water inlet of a hydroelectric power station according to claim 1, characterized in that: It also comprises a net frame (12), wherein the blocking net (11) is placed in the net frame (12) and is fixedly connected to the net frame (12); the net frame (12) is fixed to the lower side of the trash can (6).

3. The method for implementing the floating trash-blocking structure at the water inlet of a hydroelectric power station according to any one of claims 1 to 2, characterized in that: The following steps are involved: S1: arranging the buoys (13) neatly and connecting them into a whole through connecting fasteners, then placing the buoys (13) connected into a whole in a steel frame (9) and fixing them by welding, thereby completing the single-row (10) assembly; S2: transporting the assembled single row (10) to the water inlet and placing it in a suitable position as a temporary platform for the staff to operate on the water surface, then transporting the second single row (10) to a suitable position, and flexibly connecting the two single rows (10) through steel ropes; S3: Repeat S2 until all the single rows are assembled to form a trash row (6); S4: The sleeve (3) and the fixing rib (4) are welded together, and the fixing rib (4) is inserted into the peripheral wall of the water intake tower (1) and fixed, so that the sleeve (3) is vertically fixed on the peripheral wall of the water intake tower (1); S5: insert the slideway (5) into the sleeve (3), and fix one end of the slideway (5) to one end of the sleeve (3) by means of the anti-slip pin (2), so that there is a gap between the outer wall of the slideway (5) and the inner wall of the sleeve (3); then weld a stopper (7) at the other end of the slideway (5); S6: movably connecting the side row (602) of the trash row (6) to the slideway (5) via a steel rope; S7: Hanging a screen (11) on the lower side of the main row (601) of the trash-blocking row (6) to complete the installation of the entire trash-blocking structure.

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