A temporary ecological discharge pipeline and blocking method for the initial stage of dam water storage

Abstract

The present invention discloses a temporary ecological discharge pipeline for the initial stage of water storage when the dam is closed. The pipeline comprises a concrete dam, a temporary ecological discharge pipeline is provided at the bottom of the concrete dam, a valve is provided at the upstream end of a steel pipe, a wheel is provided on the valve, the wheel is connected to a handwheel control shaft, a steel platform support is provided at the top of the concrete dam, a bracket is provided on the steel platform support, an operating wheel is provided on the bracket, a wire rope drum is provided on the operating wheel, and the wire rope drum is connected to an operating handle. By providing a temporary ecological discharge pipeline, the present invention can meet the temporary ecological discharge needs of the dam in the initial stage of water storage. The outer disk of the wheel is rotated to drive the wheel claw to perform reciprocating circular arc motion. The wheel claw is unhooked when rotating in the opposite direction, and the claw engages the wheel teeth when rotating in the forward direction, thereby achieving continuous forward rotation of the wheel and driving the valve handwheel shaft to rotate and close the valve. Blocking the pipeline by a simple anti-blocking method also meets the needs of permanent operation of the dam and is suitable for large-scale promotion and use.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydropower station dams, and particularly relates to a temporary ecological discharge pipeline in the initial stage of water storage after the dam is closed, and also relates to a method for blocking the temporary ecological discharge pipeline in the initial stage of water storage after the dam is closed. Background Art

[0002] During the initial stage of water storage at a hydropower station dam, the river is cut off, and the discharge bottom holes or ecological discharge pipes installed on the dam need to be filled to a certain elevation before discharge conditions are met. This will cause the downstream river channel to be completely cut off during the period when the dam is filled to a certain elevation, causing a great impact on the living water supply of downstream residents and the river ecology. Therefore, there is an urgent need for a temporary ecological discharge pipe and a blocking method for the initial stage of water storage after the dam is closed. Summary of the Invention

[0003] The main purpose of the present invention is to provide a temporary ecological drainage pipe and blocking method for the initial stage of water storage after the dam is closed. This solves the problem that in the early stage of water storage at the existing hydropower station dam, the downstream river channel is cut off due to the dam being blocked, which has a significant impact on the water supply of downstream residents and the river ecology.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a temporary ecological discharge pipeline for the initial stage of water storage when the dam is closed, comprising a concrete dam, a temporary ecological discharge pipe buried at the bottom of the concrete dam, a valve provided at the upstream end of the steel pipe, a wheel provided on the valve, the wheel connected to a handwheel control shaft, a steel platform support provided on the top of the concrete dam near the upstream side, a bracket provided on the steel platform support, an operating wheel provided on the bracket, a wire rope drum provided on the operating wheel, and an operating handle connected to the wire rope drum.

[0005] Furthermore, the wheel disc is installed on a steel platform formed by a cantilever extending from the upstream end of the dam.

[0006] Furthermore, a drum central axis tube is provided at the axis center position of the wire rope reel, a base plate is provided on the bracket, an axle sleeve plate is provided on the outer periphery of the drum central axis tube, and the drum central axis tube is connected to an operating handle.

[0007] Furthermore, the wheel disc includes a wheel, which has wheel teeth on its periphery, and the wheel disc is also provided with wheel claws corresponding to the wheel teeth. A valve handwheel shaft is provided at the center of the wheel, and the valve handwheel shaft is connected to the valve.

[0008] Furthermore, the wheel claw is provided with a wheel claw rotating shaft, and the wheel disc also includes an outer disc. The wheel claw on the wheel disc is fixed to the outer disc by the wheel claw rotating shaft, and the wheel claw is driven to perform reciprocating circular motion by rotating the outer disc.

[0009] Furthermore, a retaining ring steel plate is sleeved on the connection between the valve handwheel shaft and the outer disc, and a valve connecting shaft sleeve is sleeved on the retaining ring steel plate.

[0010] Furthermore, a retaining wall is provided around the valve, and the retaining wall forms a valve pit that is closed on all sides.

[0011] Furthermore, a temporary ecological discharge pipeline blocking method in the initial stage of dam water storage includes the following steps:

[0012] Step 1: A temporary ecological release channel is formed by burying a steel pipe at the bottom of the dam at a position close to the water level of the upstream river to connect the upstream and downstream of the dam;

[0013] Step 2: Install a valve at the upstream end of the steel pipe. When the dam is closed and water is stored, the valve is in the open state. When water is stored, water can be supplied to the downstream river through the steel pipe. A rotary disc is installed on the valve to connect with the handwheel control shaft of the valve. An operating rotary disc is installed at the same position on the dam top;

[0014] Step 3: Connect a wire rope to both sides of the wheel disc and the operating wheel disc respectively. The length of the wire rope fixed on the wheel disc and the operating wheel disc is not less than 180° on the wheel disc drum and not more than 360°. The range of motion of the wheel claw on the wheel disc is within 180° of the upper part of the wheel, ensuring that the wheel claw 8 can always be attached to the wheel teeth by relying on its own gravity, so that the wheel claw automatically disengages when rotating in the reverse direction and automatically engages the wheel teeth when rotating in the forward direction, thereby realizing continuous forward rotation of the wheel and driving the valve handwheel shaft 11 to rotate and close the valve 1;

[0015] Step 4: After the water level reaches the elevation of the permanent ecological discharge pipe, the valve of the temporary ecological discharge pipe is immediately closed after the water is discharged using the dam's permanent discharge facilities;

[0016] Step 5: After valve 1 is closed, the valve pit is backfilled with concrete using an underwater chute method, so that the valve is completely wrapped and protected by concrete, forming a permanent plugging requirement;

[0017] Step 6: Cut the wire rope and remove the operating wheel and operating platform on the top of the dam.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the present invention can meet the temporary ecological discharge needs of the dam in the initial stage of water storage by setting up a temporary ecological discharge pipeline, and drives the outer disk of the rotary disc to make reciprocating circular arc motion by rotating the rotary claw, and unhooks when the rotary claw rotates in the opposite direction, and clamps the rotary teeth when rotating in the forward direction, so as to realize the continuous forward rotation of the rotary disc and drive the valve handwheel shaft to rotate and close the valve. The concrete dam is also provided with a permanent ecological discharge pipeline. After the water storage elevation reaches the elevation of the permanent ecological discharge pipe, the dam's permanent discharge facilities can be used for discharge, and the temporary ecological discharge pipe can be immediately closed by using the valve. After the valve is closed, the valve pit is backfilled with concrete by using the underwater chute method, so that the valve is completely wrapped and protected by concrete, forming a permanent blocking requirement. Blocking the pipeline by a simple anti-blocking method also meets the needs of permanent operation of the dam. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a temporary ecological discharge pipeline for the initial stage of water storage after the dam is closed according to the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the upper part of the AA cross-section structure;

[0021] Figure 3 for Figure 1 Schematic diagram of the lower half of the AA cross-section structure;

[0022] Figure 4 for Figure 3 Schematic diagram of the BB cross-section structure;

[0023] Figure 5 for Figure 2 Schematic diagram of the CC cross-section structure.

[0024] In the figure: 1. Valve; 2. Puller plate; 3. Handwheel control shaft; 4. Wire rope; 5. Bracket; 6. Operating handle; 7. Wire rope drum; 8. Puller; 9. Puller claw; 10. Puller claw rotating shaft; 11. Valve handwheel shaft; 12. Valve connecting shaft sleeve; 13. Retaining ring steel plate; 14. Outer plate; 15. Base plate; 16. Shaft sleeve plate; 17. Drum center shaft tube. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1 The present invention discloses a temporary ecological discharge pipeline for the initial stage of water storage when the dam is closed. The pipeline comprises a concrete dam with a temporary ecological discharge pipeline buried at the bottom of the concrete dam. Specifically, a steel pipe is buried at a position at the bottom of the dam at a similar elevation to the water level of the upstream river. The steel pipe is a hollow pipe that connects the upstream and downstream of the dam to form a temporary ecological discharge channel. Preferably, the diameter of the buried steel pipe needs to meet the minimum ecological discharge volume of the downstream river.

[0027] Furthermore, a valve 1 is provided at the upstream end of the steel pipe. When the dam is closed and water storage begins, the valve 1 is in an open state. When water storage begins, water can be supplied to the downstream river channel through the steel pipe.

[0028] Furthermore, a wheel disc 2 is provided on the valve 1, which is mounted on a steel platform formed by the cantilever extending from the upstream end of the dam. The wheel disc 2 is connected to a handwheel control shaft 3, see Figure 2 A steel platform support is provided on the upstream side of the dam crest, on which a bracket 5 is provided, on which a handwheel control shaft 3 and an operating wheel are provided, on which a wire rope drum 7 is provided, and further, an operating handle 6 is connected to the wire rope drum 7. Specifically, see Figure 5 A drum central axis tube 17 is provided at the axial center position of the wire rope drum 7, a base plate 15 is provided on the bracket 5, and an axis sleeve plate 16 is provided on the outer periphery of the drum central axis tube 17. The drum central axis tube 17 is connected to the operating handle 6. By controlling the operating handle 6, the rotation of the wire rope drum 7 can be controlled to retract and release the wire rope 4.

[0029] The coil length of the wire rope 4 fixed on the wheel disc 2 and the operating wheel disc is not less than 180° on the wheel disc drum and not greater than 360°.

[0030] Further, see Figure 3 The wheel disc 2 includes a wheel 8, which has wheel teeth on the periphery. The wheel disc 2 is also provided with a wheel claw 9 corresponding to the wheel teeth on the wheel 8. Furthermore, a valve handwheel shaft 11 is provided at the center of the wheel 8. The valve handwheel shaft 11 is connected to the valve 1 and can control the opening and closing of the valve 1.

[0031] The movable range of the wheel claw 9 on the wheel disc 2 is within an angle of 180° on the upper part of the wheel 8, ensuring that the wheel claw 9 can always rely on the gravity of its own weight to attach to the wheel teeth, so that the wheel claw 9 can automatically unhook when rotating in the reverse direction and automatically clamp the wheel teeth when rotating in the forward direction.

[0032] Furthermore, a pawl shaft 10 is provided on the pawl 9. Figure 4The wheel disc 2 also includes an outer disc 14. The wheel claw 9 on the wheel disc 2 is fixed to the outer disc 14 of the wheel disc 2 by using the wheel claw rotating shaft 10. By rotating the outer disc 14 of the wheel disc 2, the wheel claw 9 is driven to perform reciprocating circular motion. The wheel claw 9 is unhooked when rotating in the opposite direction, and the claw is engaged with the wheel teeth when rotating forward, thereby realizing continuous forward rotation of the wheel 8 and driving the valve handwheel shaft 11 to rotate and close the valve 1.

[0033] The valve 1 is closed by manpower by rotating the operating wheel back and forth within a range of 180 degrees. The wire rope 4 connected to the wheel 2 and the operating wheel drives the wheel 2 on the valve 1 to rotate back and forth to close the valve 1, thereby realizing the underwater closing operation of the valve.

[0034] Furthermore, a retaining ring steel plate 13 is sleeved on the connection between the valve handwheel shaft 11 and the outer disk 14 , and a valve connecting shaft sleeve 12 is sleeved on the retaining ring steel plate 13 .

[0035] Furthermore, the concrete dam is also provided with a permanent ecological discharge pipe. After the water storage elevation reaches the elevation of the permanent ecological discharge pipe, the dam's permanent discharge facilities can be used for discharge, and then the temporary ecological discharge pipe can be immediately closed using valve 1.

[0036] Furthermore, a retaining dam is installed around valve 1, forming a closed valve pit. The top of the retaining dam is 10 cm higher than the top of valve 1. After valve 1 is closed, the pit is backfilled with concrete using an underwater chute method, completely encasing the valve in concrete and creating a permanent seal. Finally, wire rope 4 is cut, and the operating wheel and operating platform on the dam top are removed.

[0037] The present invention also discloses a temporary ecological discharge pipeline blocking method in the initial stage of water storage when the dam is closed, comprising the following steps:

[0038] Step 1: A temporary ecological release channel is formed by burying a steel pipe at the bottom of the dam at a position close to the water level of the upstream river to connect the upstream and downstream of the dam;

[0039] Step 2: Install a valve 1 at the upstream end of the steel pipe. When the dam is closed and water is stored, the valve is in an open state. When water is stored, water can be supplied to the downstream river through the steel pipe. Install a wheel 2 on the valve 1 and connect it to the handwheel control shaft 3 of the valve 1. Install an operating wheel on the dam top at the same position above.

[0040] Step 3: Connect a wire rope 4 to both sides of the wheel disc 2 and the operating wheel disc respectively. The length of the wire rope 4 fixed on the wheel disc 2 and the operating wheel disc is not less than 180° on the wheel disc drum and not greater than 360°. The wheel claw 9 on the wheel disc 2 has a range of motion within 180° of the upper part of the wheel, ensuring that the wheel claw 9 can always rely on its own gravity to attach to the wheel teeth, so that the wheel claw 9 automatically disengages when rotating in the reverse direction and automatically engages the wheel teeth when rotating forward, thereby realizing continuous forward rotation of the wheel and driving the valve handwheel shaft 11 to rotate and close the valve 1;

[0041] Step 4: After the water level reaches the elevation of the permanent ecological discharge pipe, the valve of the temporary ecological discharge pipe is immediately closed after the water is discharged using the dam's permanent discharge facilities;

[0042] Step 5: After valve 1 is closed, the valve pit is backfilled with concrete using an underwater chute method, so that the valve is completely wrapped and protected by concrete, forming a permanent plugging requirement;

[0043] Step 6: Cut the wire rope 4 and remove the operating wheel and operating platform on the top of the dam.

[0044] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A temporary ecological discharge pipeline blocking method for the initial stage of dam water storage, characterized by: The following steps are involved: Step 1: A temporary ecological release channel is formed by burying a steel pipe at the bottom of the dam at a position close to the water level of the upstream river to connect the upstream and downstream of the dam; Step 2: A valve (1) is provided at the upstream end of the steel pipe. The valve is in an open state when the dam is closed and water storage begins. When water storage begins, water can be supplied to the downstream river channel through the steel pipe. A wheel disc (2) is provided on the valve (1). The wheel disc (2) is connected to the handwheel control shaft (3) of the valve (1). An operating wheel disc is provided at the same position on the dam top above. Step 3: A steel wire rope (4) is connected to both sides of the wheel disc (2) and the operating wheel disc respectively. The length of the coil of the steel wire rope (4) fixed on the wheel disc (2) and the operating wheel disc is not less than 180 degrees on the wheel disc drum and not greater than 360 degrees. The wheel disc (2) includes a wheel (8), and the wheel (8) has wheel teeth on the periphery. The wheel disc (2) is also provided with a wheel claw (9) corresponding to the wheel teeth. A valve handwheel shaft (11) is provided at the center of the wheel (8). The valve handwheel shaft (11) is connected to the valve (1). The wheel claw (9) on the wheel disc (2) has a range of motion within 180 degrees of the upper part of the wheel, ensuring that the wheel claw (9) can always rely on the gravity of its own weight to attach to the wheel teeth, so that the wheel claw (9) automatically disengages when rotating in the reverse direction and automatically engages the wheel teeth when rotating in the forward direction, so that the wheel rotates continuously in the forward direction and drives the valve handwheel shaft (11) to rotate and close the valve (1); Step 4: After the water level reaches the level of the permanent ecological discharge pipe, the dam's permanent discharge facilities are used for discharge, and the valve of the temporary ecological discharge pipe is immediately closed; Step 5: After the valve (1) is closed, the valve pit is backfilled with concrete using an underwater chute method, so that the valve is completely wrapped and protected by concrete, forming a permanent sealing requirement; Step 6: Cut the wire rope (4) and remove the operating wheel and operating platform on the top of the dam.

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