Temporary ecological release pipeline in initial stage of gate closing and water storage of dam and blocking method

Abstract

The temporary ecological release pipeline comprises a concrete dam, the bottom of the concrete dam is provided with a temporary ecological release pipe, the upstream end of a steel pipe is provided with a valve, the valve is provided with a ratchet disc, the ratchet disc is connected with a hand wheel control shaft, and the top of the concrete dam is provided with a steel platform support. A support is arranged on the steel platform support, an operation wheel disc is arranged on the support, and a steel wire rope reel is arranged on the operation wheel disc and connected with an operation handle. By arranging the temporary ecological releasing pipeline, the temporary ecological releasing requirement in the initial stage of dam water storage can be met, the outer disc of the ratchet wheel disc is rotated to drive the ratchet wheel claw to do reciprocating arc motion, and the ratchet wheel claw is unhooked when rotating in the reverse direction and clamps the ratchet wheel teeth when rotating in the forward direction; continuous forward rotation of the ratchet wheel is achieved, and the valve hand wheel shaft is driven to rotate to close the valve. The pipeline is blocked through a simple anti-blocking method, the requirement for permanent operation of the dam is met, and the method is suitable for large-scale application and popularization.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydropower dam, and particularly relates to a temporary ecological water release pipeline during the initial stage of impounding water for a dam, and also relates to a method for plugging the temporary ecological water release pipeline during the initial stage of impounding water for a dam. Background Art

[0002] During the initial stage of impounding water for a hydropower dam, since the river is cut off, and the water release bottom holes or ecological water release pipelines provided on the dam need to reach a certain elevation of water storage to have the water release condition, this will cause the downstream river channel to be completely cut off during the period when the dam impounds water to a certain elevation, which has a greater impact on the domestic water intake of downstream residents and the river ecosystem. Therefore, there is an urgent need for a temporary ecological water release pipeline and a plugging method during the initial stage of impounding water for a dam. Summary of the Invention

[0003] The main purpose of the present invention is to provide a temporary ecological water release pipeline and a plugging method during the initial stage of impounding water for a dam. It solves the problem that during the initial stage of impounding water for an existing hydropower dam, due to the interruption of the river, the downstream river channel is in a cut-off state, which has a greater impact on the domestic water intake of downstream residents and the river ecosystem.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a temporary ecological water release pipeline during the initial stage of impounding water for a dam, including a concrete dam, a temporary ecological water release pipe is buried at the bottom of the concrete dam, a valve is arranged at the upstream end of the steel pipe, a ratchet wheel disc is arranged on the valve, the ratchet wheel disc is connected with a handwheel control shaft, a steel platform support is arranged on the upstream side near the top of the concrete dam, a bracket is arranged on the steel platform support, an operation wheel disc is arranged on the bracket, a wire rope reel is arranged on the operation wheel disc, and the wire rope reel is connected with an operation handle.

[0005] Further, the ratchet wheel disc is installed on the steel platform formed by the cantilever extension at the upstream end side of the dam.

[0006] Further, a drum central shaft tube is arranged at the axial center position of the wire rope reel, a base plate is arranged on the bracket, a sleeve plate is sleeved on the periphery of the drum central shaft tube, and the drum central shaft tube is connected with an operation handle.

[0007] Further, the ratchet wheel disc includes a ratchet wheel, ratchet teeth are arranged on the periphery of the ratchet wheel, ratchet claws corresponding to the ratchet teeth are also arranged on the ratchet wheel disc, a valve handwheel shaft is arranged at the central position of the ratchet wheel, and the valve handwheel shaft is connected with the valve.

[0008] Further, a ratchet claw rotating shaft is arranged on the ratchet claw, the ratchet wheel disc further includes an outer disc, the ratchet claws on the ratchet wheel disc are fixed on the outer disc by using the ratchet claw rotating shaft, and the ratchet claws are driven to make a reciprocating circular arc motion by rotating the outer disc.

[0009] Furthermore, a retaining ring steel plate is sleeved at 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 sill is provided around the valve, and the retaining sill forms a valve pit that is closed on all sides.

[0011] Furthermore, a method for plugging a temporary ecological water release pipeline during the initial stage of the dam's water storage includes the following steps: Step 1: A steel pipeline buried at a position with an elevation similar to the water level of the upstream river channel at the bottom of the dam is used to connect the upstream and downstream of the dam, forming a temporary ecological water release channel; Step 2: A valve is provided at the upstream end of the steel pipe. The valve is in an open state when the dam starts to store water. Water can be supplied to the downstream river channel through the steel pipe at the beginning of water storage. A ratchet wheel disc is provided on the valve and connected to the handwheel control shaft of the valve. An operating wheel disc is provided on the dam crest at the same upper position; Step 3: A steel wire rope is connected to each side of the ratchet wheel disc and the operating wheel disc. The fixed winding length of the steel wire rope on the ratchet wheel disc and the operating wheel disc is not less than 180° and not greater than 360° on the wheel disc drum. The moving range of the ratchet pawl on the ratchet wheel disc is within 180° above the ratchet wheel, ensuring that the ratchet pawl 8 can always adhere to the ratchet teeth by its own gravity, realizing that the ratchet pawl automatically unhooks when rotating in the reverse direction and automatically claws the ratchet teeth when rotating in the forward direction, achieving continuous forward rotation of the ratchet wheel and driving the valve handwheel shaft 11 to rotate to close the valve 1; Step 4: After the water storage elevation reaches the elevation of the permanent ecological water release pipe, after using the permanent water release facilities of the dam for water release, immediately close the valve of the temporary ecological water release pipe; Step 5: After the valve 1 is closed, the valve pit is backfilled with concrete using the underwater chute feeding method, so that the valve is completely wrapped and protected by the concrete, forming a permanent plugging requirement; Step 6: Cut the steel wire rope and remove the operating wheel disc and the operating platform on the dam crest.

[0012] Compared with the prior art, the present invention has the following beneficial effects: By setting up a temporary ecological release pipeline, the present invention can meet the temporary ecological release needs in the initial stage of dam impoundment. By driving the thorn wheel claws to make reciprocating circular arc movements through the outer disc of the rotating thorn wheel disc, and using the thorn wheel claws to unhook when rotating in the reverse direction and engaging with the thorn wheel teeth when rotating in the forward direction, the continuous forward rotation of the thorn wheel is realized and the valve handwheel shaft is driven to rotate to close the valve. The concrete dam is also provided with a permanent ecological release pipeline. After the water storage elevation reaches the elevation of the permanent ecological release pipe, after using the permanent release facilities of the dam for release, the temporary ecological release 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 feeding method, so that the valve is completely wrapped and protected by concrete to form a permanent plugging requirement. Plugging the pipeline by a simple anti-blocking method also meets the needs of the permanent operation of the dam. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. is a schematic structural diagram of a temporary ecological release pipeline at the initial stage of the dam closure and water storage of the present invention; Figure 2 is Figure 1 the upper half structural schematic diagram of the A-A sectional structure in; Figure 3 is Figure 1 the lower half structural schematic diagram of the A-A sectional structure in; Figure 4 is Figure 3 the B-B sectional structural schematic diagram in; Figure 5 is Figure 2 the C-C sectional structural schematic diagram in.

[0014] In the figure: 1. Valve; 2. Thorn wheel disc; 3. Handwheel control shaft; 4. Steel wire rope; 5. Bracket; 6. Operating handle; 7. Steel wire rope reel; 8. Thorn wheel; 9. Thorn wheel claw; 10. Thorn wheel claw rotating shaft; 11. Valve handwheel shaft; 12. Valve connecting shaft sleeve; 13. Retaining ring steel plate; 14. Outer disc; 15. Base plate; 16. Bush plate; 17. Drum middle shaft tube. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0016] See Figure 1, the present invention discloses a temporary ecological release pipeline during the initial stage of the dam's impoundment. It includes a concrete dam, and a temporary ecological release pipe is buried at the bottom of the concrete dam. Specifically, a steel pipe is buried at a position with an elevation similar to the water level of the upstream river channel at the bottom of the dam. The steel pipe is a hollow pipe that connects the upstream and downstream of the dam to form a temporary ecological release channel. Preferably, the diameter of the buried steel pipe needs to meet the minimum ecological release flow of the downstream river channel.

[0017] Furthermore, a valve 1 is provided at the upstream end of the steel pipe. When the dam starts to impound water, valve 1 is in an open state, and water can be supplied to the downstream river channel through the steel pipe at the beginning of impoundment.

[0018] Furthermore, a ratchet wheel disc 2 is provided on valve 1. The ratchet wheel disc 2 is installed on a steel platform formed by the cantilever extension on the upstream side of the dam. The ratchet wheel disc 2 is connected to a handwheel control shaft 3. See Figure 2 , a steel platform support is provided on the upstream side near the top of the dam. A bracket 5 is provided on the steel platform support, and a handwheel control shaft 3 and an operation wheel disc are provided on the bracket 5. A wire rope drum 7 is provided on the operation wheel disc. Furthermore, the wire rope drum 7 is connected to an operation handle 6. Specifically, see Figure 5 , a drum central shaft tube 17 is provided at the central position of the wire rope drum 7. A base plate 15 is provided on the bracket 5. A sleeve plate 16 is sleeved around the drum central shaft tube 17. The drum central shaft tube 17 is connected to an operation handle 6. By controlling the operation handle 6, the rotation of the wire rope drum 7 can be controlled to wind and unwind the wire rope 4.

[0019] The winding length of the wire rope 4 around the ratchet wheel disc 2 and the operation wheel disc is not less than 180° and not greater than 360° on the wheel disc drum.

[0020] Furthermore, see Figure 3 , the ratchet wheel disc 2 includes a ratchet wheel 8. There are ratchet teeth on the periphery of the ratchet wheel 8. A ratchet pawl 9 corresponding to the ratchet teeth on the ratchet wheel 8 is also provided on the ratchet wheel disc 2. Furthermore, a valve handwheel shaft 11 is provided at the central position of the ratchet wheel 8. The valve handwheel shaft 11 is connected to valve 1 and can control the opening and closing of valve 1.

[0021] The moving range of the ratchet pawl 9 on the ratchet wheel disc 2 is within 180° above the ratchet wheel 8, ensuring that the ratchet pawl 9 can always adhere to the ratchet teeth by its own gravity, realizing that the ratchet pawl 9 has self-unhooking when rotating in the reverse direction and automatically claws the ratchet teeth when rotating in the forward direction.

[0022] Furthermore, a ratchet pawl rotating shaft 10 is provided on the ratchet pawl 9. See Figure 4, the ratchet wheel disc 2 further includes an outer disc 14. The ratchet claws 9 on the ratchet wheel disc 2 are fixed on the outer disc 14 of the ratchet wheel disc 2 by means of ratchet claw rotating shafts 10. By rotating the outer disc 14 of the ratchet wheel disc 2, the ratchet claws 9 are driven to perform reciprocating circular arc motions. When the ratchet claws 9 rotate in the reverse direction, they are disengaged, and when they rotate in the forward direction, they engage with the ratchet teeth, so as to realize the continuous forward rotation of the ratchet wheel 8 and drive the valve handwheel shaft 11 to rotate to close the valve 1.

[0023] The closing of the valve 1 is realized by manually rotating the operating wheel disc reciprocally within 180°. The steel wire rope 4 connecting the ratchet wheel disc 2 and the operating wheel disc drives the ratchet wheel disc 2 on the valve 1 to rotate reciprocally to close the valve 1, thereby realizing the underwater closing operation of the valve.

[0024] Furthermore, a retaining ring steel plate 13 is sleeved at the connection between the valve handwheel shaft 11 and the outer disc 14, and a valve connecting shaft sleeve 12 is sleeved on the retaining ring steel plate 13.

[0025] Furthermore, the concrete dam is also provided with a permanent ecological water release pipeline. After the water storage elevation reaches the elevation of the permanent ecological water release pipe, after releasing water by using the permanent water release facilities of the dam, the valve 1 is immediately used to close the temporary ecological water release pipe.

[0026] Furthermore, a retaining sill is also arranged around the valve 1. The retaining sill forms a valve pit that is enclosed on all sides. The top elevation of the retaining sill is 10 cm higher than the top of the valve 1. After the valve 1 is closed, the valve pit is backfilled with concrete by using the underwater chute feeding method, so that the valve is completely wrapped and protected by the concrete to meet the requirement of permanent plugging. Finally, the steel wire rope 4 is cut, and the operating wheel disc and the operating platform on the dam crest are removed.

[0027] The present invention also discloses a method for plugging a temporary ecological water release pipeline during the initial stage of the dam's closure of water storage, including the following steps: Step 1: A steel pipeline is buried at a position with an elevation close to the water level of the upstream river channel at the bottom of the dam to connect the upstream and downstream of the dam, forming a temporary ecological water release channel.

[0028] Step 2: A valve 1 is arranged at the upstream end of the steel pipe. The valve is in an open state at the beginning of the dam's closure of water storage. Water can be supplied to the downstream river channel through the steel pipe at the beginning of water storage. A ratchet wheel disc 2 is arranged on the valve 1 and connected to the handwheel control shaft 3 of the valve 1, and an operating wheel disc is arranged at the same position on the upper part of the dam crest.

[0029] Step 3: Connect a steel wire rope 4 to both sides of the thorn wheel disc 2 and the operation wheel disc respectively. The fixed winding length of the steel wire rope 4 on the thorn wheel disc 2 and the operation wheel disc is not less than 180° and not greater than 360° on the wheel disc drum. The moving range of the thorn wheel claws 9 on the thorn wheel disc 2 is within 180° above the thorn wheel, ensuring that the thorn wheel claws 9 can always adhere to the thorn wheel teeth by their own gravity, realizing that the thorn wheel claws 9 can automatically unhook when rotating in the reverse direction and automatically catch the thorn wheel teeth when rotating in the forward direction, so as to realize the continuous forward rotation of the thorn wheel and drive the valve handwheel shaft 11 to rotate to close the valve 1.

[0030] Step 4: After the water storage elevation reaches the elevation of the permanent ecological discharge pipe, after discharging water using the permanent discharge facilities of the dam, immediately close the valve of the temporary ecological discharge pipe.

[0031] Step 5: After the valve 1 is closed, use the underwater chute feeding method to backfill the valve pit with concrete, so that the valve is completely wrapped and protected by the concrete to form a permanent plugging requirement.

[0032] Step 6: Cut off the steel wire rope 4 and remove the operation wheel disc and the operation platform on the dam crest.

[0033] It should be noted that in this article, relational terms such as first and second are only used 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 "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or device.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temporary ecological water release pipeline during the initial stage of water storage in a dam, characterized in that: It includes a concrete dam. A temporary ecological water release pipe is buried at the bottom of the concrete dam. A valve (1) is provided at the upstream end of the steel pipe. A ratchet wheel disc (2) is provided on the valve (1). The ratchet wheel disc (2) is connected to a handwheel control shaft (3). On the side close to the upstream of the dam crest of the concrete dam, there is a steel platform support. A bracket (5) is provided on the steel platform support. An operating wheel disc is provided on the bracket (5). A wire rope drum (7) is provided on the operating wheel disc. The wire rope drum (7) is connected to an operating handle (6).

2. The temporary ecological release pipeline during the initial stage of impounding water for a dam according to claim 1, characterized in that: The ratchet wheel disc (2) is installed on a steel platform formed by the cantilever extension on the upstream end side of the dam.

3. The temporary ecological water release pipeline during the initial stage of the dam's impoundment according to claim 1, characterized in that: A drum central shaft 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). A shaft sleeve plate (16) is sleeved outside the drum central shaft tube (17). The drum central shaft tube (17) is connected to an operating handle (6).

4. The temporary ecological release pipeline in the initial stage of impounding water under the dam according to claim 1, characterized in that: The ratchet wheel disc (2) includes a ratchet wheel (8). There are ratchet teeth on the periphery of the ratchet wheel (8). Ratchet claws (9) corresponding to the ratchet teeth are also provided on the ratchet wheel disc (2). A valve handwheel shaft (11) is provided at the central position of the ratchet wheel (8). The valve handwheel shaft (11) is connected to the valve (1).

5. The temporary ecological water release pipeline during the initial stage of impounding water for a dam according to claim 4, characterized in that: A ratchet claw rotating shaft (10) is provided on the ratchet claw (9). The ratchet wheel disc (2) further includes an outer disc (14). The ratchet claws (9) on the ratchet wheel disc (2) are fixed on the outer disc (14) by using the ratchet claw rotating shafts (10). By rotating the outer disc (14), the ratchet claws (9) are driven to make reciprocating circular arc movements.

6. The temporary ecological release pipeline during the initial stage of impounding water for a dam according to claim 5, characterized in that: A retaining ring steel plate (13) is sleeved at the connection between the valve handwheel shaft (11) and the outer disc (14). A valve connecting shaft sleeve (12) is sleeved on the retaining ring steel plate (13).

7. The temporary ecological release pipeline during the initial stage of water storage by closing the sluice of a dam according to claim 1, characterized in that: A retaining sill is further provided around the valve (1). The retaining sill forms a valve pit that is closed all around.

8. A method for blocking a temporary ecological water release pipeline during the initial stage of the dam's closure and water storage, according to claim 1, includes the following steps: Step 1: Connect the upstream and downstream of the dam through a steel pipe buried at a position with an elevation similar to the water level of the upstream river channel at the bottom of the dam to form a temporary ecological water release channel; Step 2: Set a valve (1) at the upstream end of the steel pipe. The valve is in an open state at the beginning of the dam's closure and water storage. When the water storage starts, water can be supplied to the downstream river channel through the steel pipe. Set a ratchet wheel disc (2) on the valve (1). The ratchet wheel disc (2) is connected to the handwheel control shaft (3) of the valve (1). Set an operating wheel disc at the same position on the upper part of the dam crest; Step 3: Connect a wire rope (4) on both sides of the ratchet wheel disc (2) and the operating wheel disc respectively. The fixed winding length of the wire rope (4) on the ratchet wheel disc (2) and the operating wheel disc is not less than 180° and not greater than 360° on the wheel disc drum. The moving range of the ratchet claws (9) on the ratchet wheel disc (2) is within 180° above the ratchet wheel, ensuring that the ratchet claws (9) can always adhere to the ratchet teeth by their own gravity, realizing that the ratchet claws (9) are self - unhooked when rotating in the reverse direction and automatically claw - catch the ratchet teeth when rotating in the forward direction, and realizing the continuous forward rotation of the ratchet wheel and driving the valve handwheel shaft (11) to rotate to close the valve (1); Step 4: After the water storage elevation reaches the elevation of the permanent ecological discharge pipe, immediately close the valve of the temporary ecological discharge pipe after discharging water using the permanent discharge facilities of the dam; Step 5: After the valve (1) is closed, use the underwater chute feeding method to backfill the valve pit with concrete so that the valve is completely wrapped and protected by concrete to form a permanent sealing requirement; Step 6: Cut the steel wire rope (4) and remove the operating wheel disc and operating platform on the dam crest.

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