Turning plate water supply system for relieving drainage of low-temperature reservoir water

Abstract

The utility model discloses a turning plate water supply system, particularly discloses a turning plate water supply system used for relieving drainage of low-temperature reservoir water, and belongs to the technical field of design and construction of water conservancy and hydropower engineering structures. The turning plate water supply system for relieving low-temperature reservoir water drainage can ensure that a water delivery system can take water with the specified flow under various operation conditions. The turning plate water supply system comprises a water taking structure and further comprises a front turning plate water level adjusting mechanism, and the front turning plate water level adjusting mechanism is arranged in a river channel in front of the water taking structure in the mode that the water retaining height can be adjusted.

Description

Technical Field

[0001] The utility model relates to a flap water supply system, in particular to a flap water supply system for alleviating the leakage of low-temperature reservoir water, and belongs to the technical field of design and construction of water conservancy and hydropower engineering structures. Background Art

[0002] 1. Terminology

[0003] 1) Normal water level: the maximum water level allowed to be stored before the water supply period begins in order to meet the needs of power generation and other benefits under normal operation of the reservoir;

[0004] 2) Dead water level: the lowest water level that the reservoir is allowed to drop to under normal operation;

[0005] 3) Ultimate dead water level: The lowest water level to which the reservoir is allowed to drop during extremely low water periods or when there are other special requirements.

[0006] 2. Reservoir water temperature stratification

[0007] In natural rivers, the temperature difference of water bodies is relatively small, the turbulent mixing effect of water bodies is strong, the free surface of unit water bodies is large, and the temperature changes significantly with air temperature. After the river is dammed into a reservoir, the water temperature characteristics will change greatly. The reservoir usually shows vertical water temperature stratification. Under normal circumstances, the temperature of the upper water body of the reservoir is higher than that of the lower water body, and the water temperature at the bottom of the reservoir is the lowest.

[0008] 3. Hazards of low-temperature water discharge

[0009] When reservoir water is discharged to the downstream river through the water transfer system, if the water intake position is low, low-temperature water may be taken from the lower or bottom layers of the reservoir, which will have a great impact on the water temperature distribution of the downstream natural river, causing delays in the breeding period and reduced production of fish in the downstream water body (fish in the breeding period are very sensitive to water temperature), and reduced production of crops irrigated by using water from the downstream river body.

[0010] 4. Existing engineering measures and main issues to alleviate low-temperature water leakage

[0011] For water conservancy and hydropower projects, in order to ensure that sufficient water is obtained and that the water channel is in a pressurized flow state, the water inlet of the water supply system needs to be set at a lower position to ensure a certain flooding depth. Without setting up other facilities, the water supply system can usually only obtain low-temperature water from the lower layer of the reservoir, which will cause a series of problems such as low-temperature water leakage.

[0012] In order to solve the problem of low-temperature water discharge from temperature-stratified reservoirs, the commonly used solution in current projects is to set up a fixed front retaining wall upstream of the water intake tower, and use the restraining effect of the front retaining wall to draw water from the upper layer of the upstream reservoir with higher water temperature. The main problems of this solution are:

[0013] Question 1: If the front retaining wall is set according to the general operating conditions of normal water storage level ~ dead water level, the top elevation of the front retaining wall usually needs to be set at a higher position to meet the requirements of the upper water body with higher water temperature. When encountering certain extreme operating conditions, such as power generation during extremely dry periods and water supply to downstream, the reservoir needs to operate between the dead water level and the extreme dead water level. Due to the limitation of the front retaining wall, the water delivery system may not be able to obtain enough water; due to the insufficient head at the top of the front retaining wall, the water flow velocity on the upper part of the front retaining wall may be too high and the inflow flow pattern of the water intake tower may be turbulent.

[0014] Question 2: If the front retaining wall is set according to the special operating conditions of dead water level ~ limit water level, the top elevation of the front retaining wall needs to be set at a lower position to meet the requirement of obtaining enough water at the limit dead water level. Under normal operating conditions, since the top elevation of the front retaining wall is set too low, the water delivery system will be drawn to the lower water body of the reservoir with lower temperature, and the effect of alleviating the discharge of low-temperature water will be relatively limited.

[0015] Question 3: The front retaining wall is high and has a large volume of concrete. Utility Model Content

[0016] The technical problem to be solved by the utility model is to provide a flap water supply system for alleviating the leakage of low-temperature reservoir water, which can ensure that the water delivery system can obtain water of specified flow under various operating conditions.

[0017] The technical solution adopted to solve the above technical problems is: a flap water supply system for alleviating the leakage of low-temperature storage water, including a water intake structure. The flap water supply system also includes a front flap water level adjustment mechanism, and the front flap water level adjustment mechanism is arranged in the river channel in front of the water intake structure with an adjustable water retaining height.

[0018] Furthermore, the water intake structure is a water intake tower arranged at the water intake position of the reservoir area, and the front flap water level regulating mechanism is arranged in the river channel on the upstream side of the water intake tower.

[0019] The preferred embodiment of the above scheme is that the front flap water level regulating mechanism includes a basic support structure and a flap gate chamber regulating structure, and the flap gate chamber regulating structure is enclosed in front of the water intake tower at the water intake position of the reservoir area with the cooperation of the basic support structure and with adjustable water retaining height.

[0020] Furthermore, the foundation support structure includes a rock sill, a base and a gate pier. The gate pier is arranged on the rock sill in front of the water intake tower through the base. The flap gate chamber adjustment structure, with the cooperation of the gate pier and the base, is enclosed in front of the water intake tower at the water intake position of the reservoir with adjustable water retaining height.

[0021] The preferred embodiment of the above scheme is that the flap gate chamber adjustment structure includes a flap gate and a buoyancy drive system, and the flap gate is enclosed in front of the water intake tower at the water intake position of the reservoir area with adjustable water retaining height through the buoyancy drive system in cooperation with the gate pier and the base.

[0022] Furthermore, the flap gate includes an arc-shaped gate groove, a foundation fixed axis, a movable axis in the gate groove and a flexible door leaf. The movable axis in the gate groove is respectively arranged on the two side edges of the flexible door leaf, and the arc-shaped gate groove is respectively arranged on the gate piers on both sides of the flexible door leaf. The upper end of the flexible door leaf is hinged to the buoyancy drive system, and the lower end of the flexible door leaf is hinged to the base through the foundation fixed axis. The buoyancy drive system drives the flexible door leaf to adjust the water intake height of the water inlet tower during the process of rotating around the foundation fixed axis by the rise and fall of the water level; the flexible door leaf during operation is limited at the lower position of the arc-shaped gate groove by the movable axis in the gate groove.

[0023] A preferred embodiment of the above scheme is that the buoyancy drive system includes a floating row and a cable, the flexible door leaf includes an anti-corrosion skeleton steel bar and a waterproof and durable flexible material coated on the anti-corrosion skeleton steel bar, the basic fixed axis is arranged at the lower end of the flexible door leaf, the movable axis in the door groove is arranged at the upper end of the flexible door leaf, the upper end of the cable is connected to the floating row, and the lower end of the cable is connected to the upper end of the flexible door leaf through the movable axis in the door groove.

[0024] Furthermore, the projection of the movable axis in the door groove in its cross section is an I-shaped structure that is wide at both ends and narrow in the middle, and the projection of the arc gate groove in its cross section is a T-shape; during the operation of the flexible door leaf, the movable axis in the door groove of the I-shaped structure cooperates with the T-shaped arc gate groove to limit the operation of the flexible door leaf.

[0025] A preferred embodiment of the above scheme is that a plurality of gate piers are arranged on the base in front of the water intake tower, a set of flap gates are arranged between each two adjacent gate piers, and each set of flap gates is driven by a set of floating rows.

[0026] Furthermore, each group of floating rows is connected to a flexible floating row group through a plurality of cables.

[0027] The beneficial effects of the utility model are as follows: the technical solution provided by the present application is based on the existing water intake structure, and the flap water supply system of the present application is formed by adding a front flap water level adjustment mechanism, and the front flap water level adjustment mechanism is arranged in the river channel in front of the water intake structure with an adjustable water retaining height. In this way, when the water level in the upstream reservoir area rises or falls, the front flap water level adjustment mechanism can adjust its water retaining height in real time according to its water level, so as to achieve the purpose of enabling the water delivery system to take water as needed, especially under special operating conditions from dead water level to extreme water level, the water retaining height can be adjusted by the front flap water level adjustment mechanism, so as to achieve the purpose of ensuring that the water delivery system can take the required water under any conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the flap water supply system for alleviating the leakage of low-temperature storage water in the utility model in a normal water level working state;

[0029] Figure 2 for Figure 1 AA section view;

[0030] Figure 3 It is a structural schematic diagram of the flap water supply system for alleviating the leakage of low-temperature storage water in the utility model in a normal dead water level working state;

[0031] Figure 4 It is a structural schematic diagram of the utility model of the flap water supply system for alleviating the leakage of low-temperature storage water in the extreme dead water level working state;

[0032] Figure 5 It is a schematic diagram of the flap gate chamber regulating structure involved in the flap water supply system for alleviating the leakage of low-temperature storage water in the utility model;

[0033] Figure 6 It is a schematic diagram of the foundation support structure involved in the flap water supply system for alleviating the leakage of low-temperature storage water in the utility model;

[0034] Figure 7 It is a schematic cross-sectional view of a gate slot involved in a flap water supply system for alleviating water leakage from a low-temperature reservoir according to the utility model.

[0035] Marked in the figure are: water intake tower 1, rock sill 2, base 3, gate pier 4, arc-shaped gate slot 5, foundation fixed axis 6, movable axis in the gate slot 7, floating row 8, cable 9, anti-corrosion skeleton steel bar 10, waterproof and durable flexible material 11. DETAILED DESCRIPTION

[0036] like Figure 1 to Figure 7The utility model shows a flap water supply system for alleviating the leakage of low-temperature reservoir water, which can ensure that the water supply system can obtain the specified flow of water under various operating conditions. The flap water supply system includes a water intake structure, and the flap water supply system also includes a front flap water level adjustment mechanism, and the front flap water level adjustment mechanism is arranged in the river in front of the water intake structure with an adjustable water retaining height. The technical solution provided by the present application is based on the existing water intake structure, and the flap water supply system of the present application is formed by adding a front flap water level adjustment mechanism, and the front flap water level adjustment mechanism is arranged in the river in front of the water intake structure with an adjustable water retaining height. In this way, when the water level in the upstream reservoir area rises or falls, the front flap water level adjustment mechanism can adjust its water retaining height in real time according to its water level, so as to achieve the purpose of enabling the water supply system to take water as needed, especially under special operating conditions from dead water level to extreme water level, the water retaining height can be adjusted by the front flap water level adjustment mechanism, so as to achieve the purpose of ensuring that the water supply system can obtain the required water under any conditions. In view of the prior art, the water intake structure of the present application is preferably an intake tower 1 arranged at the water intake position of the reservoir area, and the front flap water level regulating mechanism is arranged in the river channel on the upstream side of the intake tower 1.

[0037] Accordingly, in order to simplify the structure of the front flap water level regulating mechanism of the present application as much as possible, so as to achieve the purpose of adjusting the water level of the water delivery system and facilitate construction and subsequent use, the front flap water level regulating mechanism of the present application includes a basic support structure and a flap gate chamber regulating structure, and the flap gate chamber regulating structure is enclosed in front of the water intake tower 1 at the water intake position of the reservoir area with an adjustable water retaining height in cooperation with the basic support structure. At this time, the basic support structure includes a rock sill 2, a base 3 and a gate pier 4, and the gate pier 4 is arranged on the rock sill 2 in front of the water intake tower 1 through the base 3, and the flap gate chamber regulating structure is enclosed in front of the water intake tower 1 at the water intake position of the reservoir area with an adjustable water retaining height in cooperation with the gate pier 4 and the base 3. The flap gate chamber regulating structure includes a flap gate and a buoyancy drive system, and the flap gate is enclosed in front of the water intake tower 1 at the water intake position of the reservoir area with an adjustable water retaining height in cooperation with the gate pier 4 and the base 3 through the buoyancy drive system. More specifically, the flap gate described in the present application includes an arc-shaped gate groove 5, a foundation fixed axis 6, a movable axis 7 in the gate groove and a flexible door leaf. The movable axis 7 in the gate groove is respectively arranged on the two side edges of the flexible door leaf, and the arc-shaped gate groove 5 is respectively arranged on the gate piers 4 on both sides of the flexible door leaf. The upper end of the flexible door leaf is hinged to the buoyancy drive system, and the lower end of the flexible door leaf is hinged to the base 3 through the foundation fixed axis 6. The buoyancy drive system drives the flexible door leaf to adjust the water intake height of the water inlet tower 1 during the process of rotating around the foundation fixed axis 6 by the rise and fall of the water level; the flexible door leaf during operation is limited at the lower position of the arc-shaped gate groove 5 by the movable axis in the gate groove. The buoyancy drive system includes a floating row 8 and a cable 9, the flexible door leaf includes an anti-corrosion skeleton steel bar 10 and a waterproof and durable flexible material 11 coated on the anti-corrosion skeleton steel bar 10, the basic fixed shaft 6 is arranged at the lower end of the flexible door leaf, the movable shaft 7 in the door groove is arranged at the upper end of the flexible door leaf, the upper end of the cable 9 is connected to the floating row 8, and the lower end of the cable 9 is connected to the upper end of the flexible door leaf through the movable shaft 7 in the door groove.

[0038] Furthermore, in order to adapt to the working condition that the flexible door leaf rotates underwater around the fixed axis 6 of the foundation in cooperation with the movable axis 7 in the door slot, the projection of the movable axis 7 in the door slot of the present application in its cross section is an I-shaped structure with wide ends and narrow in the middle, and the projection of the arc gate slot 5 in its cross section is T-shaped; during the operation of the flexible door leaf, the movable axis 7 in the door slot of the I-shaped structure cooperates with the arc gate slot 5 of the T-shaped to limit the operation of the flexible door leaf. Combined with the actual working conditions of the water conservancy and hydropower project, at the same time, the volume of the floating row itself is appropriately reduced. In the present application, a plurality of gate piers 4 are arranged on the base 3 in front of the water intake tower 1, and a set of flap gates are arranged between each two gate piers 4, and each set of flap gates is driven by a group of floating rows. Each group of floating rows is connected to a flexible floating row group by a plurality of cables 9.

[0039] In summary, the above solution provided by this application also has the following advantages:

[0040] 1. It can automatically adjust the top elevation of the retaining wall according to the change of the upstream reservoir water level. The specific functions are as follows:

[0041] 1) The rock sill and the base are continuously arranged upstream of the water intake tower, forming a continuous water retaining structure; the gate piers are arranged at intervals upstream of the water intake tower, and space is left between the gate piers for water to pass through;

[0042] 2) The flap gate is hinged to the base through the foundation fixed axis, and the lower part remains fixed;

[0043] 3) The flap gate is composed of a foundation fixed axis, a movable axis in the gate slot and a flexible door leaf. The movable axis in the gate slot is set in the gate slot of the gate pier and can move up and down along the arc-shaped gate slot of the gate pier with the foundation fixed axis as the center of the circle;

[0044] 4) The gate slot of the gate pier is set with an upstream boundary, and the downstream boundary ends at the base, which can limit the flap gate from extending upstream beyond the gate pier range;

[0045] 5) The movable axis in the gate slot adopts an "I" shape with wide ends and narrow in the middle. The gate slot of the gate pier adopts a shape with wide inside and narrow outside. The movable axis in the gate slot is always located in the gate slot of the gate pier, which can ensure the lateral stability of the flap gate;

[0046] 6) The floating row is connected to the flap gate by a cable. Since the buoyancy provided by the floating row is greater than the gravity of the flap gate system, under the buoyancy of the floating row, the downstream end can move up and down along the arc-shaped gate slot of the gate pier when the upstream end of the flap gate is fixed, and the vertical distance between the movable axis in the uppermost slot of the flap gate and the upstream water surface line is always kept fixed;

[0047] 7) The floating rafts are connected by cables to enhance the integrity of the rafts under the action of water flow.

[0048] In summary, the buoyancy flap gate structure provided in the present application can automatically adjust the elevation of the water retaining top according to changes in the water level of the upstream reservoir, ensuring that when the reservoir operates between the normal water storage level and the extreme dead water level, the vertical distance between the upstream water surface line and the top of the flap gate always remains fixed, which not only satisfies the requirement of obtaining sufficient water under special operating conditions (dead water level to extreme water level), but also satisfies the requirement of always obtaining upper water with higher temperature under normal operating conditions (normal water storage level to dead water level).

[0049] 2. Convenient operation and no energy consumption. The buoyancy flap gate structure provided in this application is a flap gate structure in which the lifting and lowering of the flap gate are completed by the buoyancy of the reservoir water, without the need for power connection, and is relatively convenient to operate and has no operating energy consumption.

[0050] 3. Compared with the fixed front retaining wall solution, the buoyant flap door structure provided in this application reserves a rock sill upstream of the water intake tower, which reduces the amount of excavation and reduces the adverse impact on the environment.

[0051] The technical solution of the present application is further described below through specific embodiments:

[0052] The technical problem to be solved by the present application is to provide a buoyancy flap door structure which can automatically adjust the elevation of the water retaining top according to the change of the water level of the upstream reservoir, so as to obtain enough water under special operating conditions (dead water level ~ limit water level), and to always obtain the upper water with higher temperature under normal operating conditions (normal water storage level ~ dead water level), and to alleviate the leakage of low-temperature water with convenient operation and no energy consumption.

[0053] The technical solution adopted by this application to solve the technical problem is:

[0054] 1. A buoyancy flap gate structure for alleviating low-temperature water leakage consists of a base structure and a gate structure.

[0055] 2. The foundation structure consists of rock sill, base and gate pier.

[0056] in:

[0057] 1) The rock sill is located upstream of the water intake tower, and the top elevation of the rock sill is higher than the water intake bottom plate elevation of the water intake tower;

[0058] 2) The base is located on the upper part of the rock sill and is continuously arranged upstream of the water intake tower;

[0059] 3) The gate piers are located on the upper part of the base and are arranged at intervals upstream of the water intake tower. The gate piers are provided with arc-shaped gate slots with their centers located upstream of the base. The gate slots are wide inside and narrow outside. The gate slots are provided with upstream boundaries, and the downstream boundaries end at the base.

[0060] 3. The gate structure consists of a flap gate, cables and floating rafts.

[0061] 1) The flap gate consists of a basic fixed axis, a movable axis in the gate slot and a flexible door leaf.

[0062] in:

[0063] ①The basic fixed axis is hinged on the base;

[0064] ② The movable axis in the gate slot adopts an “I” shape with wide ends and narrow middle, and is arranged in the gate slot of the gate pier with an arc shape;

[0065] ③The flexible door leaf is set between the fixed axis of the foundation and the movable axis in the door groove. It is made of waterproof flexible material with good durability. Anti-corrosion skeleton steel bars are set in the flexible door leaf to ensure its deformation integrity.

[0066] 2) The floating rows are arranged at intervals upstream of the water intake tower and directly above the flap gate; the lateral width of the floating rows is smaller than the distance between adjacent gate piers and the width of the flap gate; the floating rows are connected by cables.

[0067] 3) The floating raft is connected to the flap gate through cables; connecting rings are set between the floating raft and the cables, and between the flap gate and the cables to ensure the strength of the connecting parts.

[0068] 4. The buoyancy provided by the floating row is greater than the gravity of the flap gate system. The length of the cable between the floating row and the flap gate can ensure that the vertical distance between the movable axis in the uppermost gate slot of the flap gate and the upstream water surface line meets the requirement of obtaining sufficient water.

Claims

1. A flap water supply system for alleviating the leakage of low-temperature storage water, including a water intake structure, characterized in that: The flap water supply system also includes a front flap water level regulating mechanism, which is arranged in the river channel in front of the water intake structure with an adjustable water retaining height.

2. The flap water supply system for alleviating the leakage of low-temperature storage water according to claim 1 is characterized in that: The water intake structure is a water intake tower (1) arranged at a water intake position in the reservoir area, and the front flap water level regulating mechanism is arranged in the river channel on the upstream side of the water intake tower (1).

3. The flap water supply system for alleviating the leakage of low-temperature storage water according to claim 1 or 2 is characterized in that: The front flap water level regulating mechanism comprises a basic support structure and a flap gate chamber regulating structure. The flap gate chamber regulating structure is arranged in cooperation with the basic support structure and has an adjustable water retaining height and is enclosed in front of a water intake tower (1) at a water intake position in the reservoir area.

4. The flap water supply system for alleviating the leakage of low-temperature storage water according to claim 3 is characterized in that: The foundation support structure comprises a rock sill (2), a base (3) and a gate pier (4); the gate pier (4) is arranged on the rock sill (2) in front of the water intake tower (1) through the base (3); and the flap gate chamber adjustment structure is arranged in front of the water intake tower (1) at the water intake position of the reservoir area with adjustable water retaining height in cooperation with the gate pier (4) and the base (3).

5. The flap water supply system for alleviating the leakage of low-temperature storage water according to claim 4 is characterized in that: The flap gate chamber regulating structure comprises a flap gate and a buoyancy drive system. The flap gate is enclosed in front of a water intake tower (1) at a water intake position in a reservoir area with an adjustable water retaining height in cooperation with a gate pier (4) and a base (3) through the buoyancy drive system.

6. The flap water supply system for alleviating the leakage of low-temperature storage water according to claim 5 is characterized in that: The flap gate comprises an arc-shaped gate slot (5), a foundation fixed shaft (6), a movable shaft (7) in the gate slot and a flexible gate leaf. The movable shaft (7) in the gate slot is respectively arranged on two side edges of the flexible gate leaf. The arc-shaped gate slot (5) is respectively arranged on gate piers (4) on both sides of the flexible gate leaf. The upper end of the flexible gate leaf is hinged to a buoyancy drive system. The lower end of the flexible gate leaf is hinged to a base (3) through a foundation fixed shaft (6). The buoyancy drive system drives the flexible gate leaf to adjust the water intake height of the water intake tower (1) in the process of rotating around the foundation fixed shaft (6) by raising and lowering the water level. During operation, the flexible gate leaf is limited at the lower position of the arc-shaped gate slot (5) by the movable shaft in the gate slot.

7. The flap water supply system for alleviating the leakage of low-temperature storage water according to claim 6 is characterized in that: The buoyancy drive system comprises a floating row (8) and a cable (9); the flexible door leaf comprises an anti-corrosion skeleton steel bar (10) and a waterproof and durable flexible material (11) coated on the anti-corrosion skeleton steel bar (10); a basic fixed shaft (6) is arranged at the lower end of the flexible door leaf; a movable shaft (7) in a door groove is arranged at the upper end of the flexible door leaf; the upper end of the cable (9) is connected to the floating row (8); and the lower end of the cable (9) is connected to the upper end of the flexible door leaf through the movable shaft (7) in the door groove.

8. The flap water supply system for alleviating the leakage of low-temperature storage water according to claim 7 is characterized in that: The projection of the movable shaft (7) in the door slot in its cross section is an I-shaped structure with wide ends and narrow in the middle, and the projection of the arc door slot (5) in its cross section is a T-shaped structure; during the operation of the flexible door leaf, the movable shaft (7) in the door slot with the I-shaped structure cooperates with the T-shaped arc door slot (5) to limit the operation of the flexible door leaf.

9. The flap water supply system for alleviating the leakage of low-temperature storage water according to claim 8 is characterized in that: A plurality of gate piers (4) are arranged on a base (3) in front of the water intake tower (1), and a set of flap gates is arranged between each two adjacent gate piers (4), and each set of flap gates is driven by a set of floating rows (8).

10. The flap water supply system for alleviating the leakage of low-temperature storage water according to claim 9 is characterized in that: Each group of floating rows (8) is connected to a flexible floating row group via a plurality of cables (9).

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