Folding water supply system for relieving drainage of low-temperature reservoir water

Abstract

The utility model discloses a folding water supply system, particularly discloses a folding 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 folding 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 folding water supply system comprises a water taking structure and further comprises a front folding water level adjusting mechanism, and the front folding 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 folding water supply system, in particular to a folding 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 folding 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 folding water supply system for alleviating the leakage of water from a low-temperature reservoir, including a water intake structure. The folding water supply system also includes a front folding water level regulating mechanism, and the front folding water level regulating 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 folding 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 folding water level regulating mechanism includes a basic support structure and a folding gate chamber regulating structure. The folding gate chamber regulating structure is enclosed in front of the water intake tower at the water intake position of the reservoir area with adjustable water retaining height in cooperation with the basic support structure.

[0020] Furthermore, the basic supporting 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 folding gate chamber adjustment structure is arranged in front of the water intake tower at the water intake position of the reservoir with adjustable water retaining height in cooperation with the gate pier and the base.

[0021] The preferred embodiment of the above scheme is that the folding gate chamber adjustment structure includes a folding gate and a buoyancy drive system, and the folding 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 folding gate includes a basic fixed axis, a movable axis in the gate slot, a movable axis outside the gate slot and at least four flexible door leaves, each flexible door leaf is hinged along the length direction through each movable axis in the door slot and each movable axis outside the door slot to form an integral folding door leaf, gate slots are respectively arranged on the gate piers on both sides of the folding door leaf, the lower end of the folding door leaf is hinged on the base between two adjacent gate piers through the basic fixed axis, and the upper end of the folding door leaf is connected to the buoyancy drive system; the folding door leaf during operation is limited at the lower position of the gate slot by the movable axis in the gate slot; the buoyancy drive system drives the folding door leaf to move back and forth vertically in the gate slot by the rise and fall of the water level, and adjusts the water intake height of the water inlet tower.

[0023] A preferred embodiment of the above scheme is that the buoyancy drive system includes a floating row and a cable, each 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, two adjacent flexible door leaves are hinged as a whole through the anti-corrosion skeleton steel bars extending out of the waterproof and durable flexible material with the cooperation of a movable shaft inside the door groove or a movable shaft outside the door groove, 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 topmost flexible door leaf.

[0024] Furthermore, the projection of the movable axis in the door slot in its horizontal plane is an I-shape that is wide at both ends and narrow in the middle, and the projection of the gate slot in its horizontal plane is a T-shape. During operation, the folding door leaves are limited by the I-shapes at both ends and the T-shape on the gate slot.

[0025] A preferred embodiment of the above scheme is that a plurality of gate piers are arranged on the retaining wall in front of the water intake tower, a set of folding gates are arranged between each two adjacent gate piers, and each set of folding 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 folding water supply system of the present application is formed by adding a front folding water level regulating mechanism, and the front folding water level regulating 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 folding water level regulating 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 of dead water level to limit water level, the water retaining height can be adjusted by the front folding water level regulating 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 folding 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 folding 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 folding water supply system for alleviating the leakage of low-temperature storage water in the utility model in the working state of the limit dead water level;

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

[0033] Figure 6 It is a schematic diagram of the basic support structure involved in the folding 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 folding 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, foundation fixed axis 5, movable axis inside gate slot 6, movable axis outside gate slot 7, flexible door leaf 9, gate slot 10, floating row 11, cable 12, anti-corrosion skeleton steel bar 13, waterproof and durable flexible material 14. DETAILED DESCRIPTION

[0036] like Figure 1 to Figure 7The utility model shows a folding 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 folding water supply system includes a water intake structure, and the folding water supply system also includes a front folding water level regulating mechanism, and the front folding water level regulating 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 folding water supply system of the present application is formed by adding a front folding water level regulating mechanism, and the front folding water level regulating 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 folding water level regulating 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 the special operating conditions of dead water level to limit water level, the water retaining height can be adjusted by the front folding water level regulating 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 pre-folding 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 pre-folding water level regulating mechanism of the present application includes a basic support structure and a folding gate chamber regulating structure, and the folding 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 folding 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 folding gate chamber regulating structure includes a folding gate and a buoyancy drive system, and the folding 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 folding gate described in the present application includes a basic fixed axis 5, a movable axis 6 in a gate slot, a movable axis 7 outside a gate slot, and at least four flexible door leaves 9. Each flexible door leaf 9 is hinged along the length direction through each movable axis 6 in the gate slot and each movable axis 7 outside the gate slot to form an integral folding door leaf. Gate slots 10 are respectively arranged on the gate piers 4 on both sides of the folding door leaf. The lower end of the folding door leaf is hinged to the base 3 between two adjacent gate piers 4 through the basic fixed axis 5, and the upper end of the folding door leaf is connected to the buoyancy drive system; the folding door leaf during operation is limited in the gate slot 10 by the movable axis 6 in the gate slot; the buoyancy drive system drives the folding door leaf to move back and forth vertically in the gate slot 10 by the rise and fall of the water level, and adjusts the water intake height of the water inlet tower. The buoyancy drive system includes a floating row 11 and a cable 12, each flexible door leaf includes an anti-corrosion skeleton steel bar 13 and a waterproof and durable flexible material 14 coated on the anti-corrosion skeleton steel bar 13, and two adjacent flexible door leaves are hinged as a whole through the anti-corrosion skeleton steel bar 13 extending out of the waterproof and durable flexible material 14 with the cooperation of the movable shaft 6 inside the door groove or the movable shaft 7 outside the door groove, the upper end of the cable 12 is connected to the floating row 11, and the lower end of the cable 12 is connected to the upper end of the topmost flexible door leaf.

[0038] Furthermore, in order to adapt to the operation of the flexible door leaf underwater, the present application sets the projection of the movable axis 6 in the door slot in its horizontal plane to be an I-shaped shape with wide ends and narrow in the middle, and the projection of the gate slot 10 in its horizontal plane is set to be a T-shaped shape, and the folding door leaf in the operation process is limited by the I-shaped shapes at both ends and the T-shaped shape on the gate slot 10. Combined with the actual working conditions of the water conservancy and hydropower project, and 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 folding gates are arranged between each two adjacent gate piers 4, and each set of folding gates is driven by a group of floating rows 11, and each group of floating rows 11 is connected to a flexible floating row group by multiple cables 12.

[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 folding gate is hinged to the base through the foundation fixed axis, and the lower part remains fixed;

[0043] 3) The folding gate is composed of a basic fixed axis, a movable axis in the gate slot, a movable axis outside 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 the folding gate can be extended and retracted upward along the gate slot of the gate pier;

[0044] 4) A top baffle is provided at the top of the gate slot of the gate pier, which can serve as a top limit to limit the folding gate from extending upward 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 folding gate;

[0046] 6) The floating row and the folding gate are connected by cables. Since the buoyancy provided by the floating row is greater than the gravity of the folding gate system, the folding gate can be extended and retracted up and down along the gate slot of the gate pier under the buoyancy of the floating row. The vertical distance between the movable axis in the uppermost gate slot of the folding 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 folding gate structure provided in the present application can automatically adjust the elevation of the water retaining top according to the 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 folding gate always remains fixed, which can not only meet the requirements of obtaining sufficient water under special operating conditions (dead water level to extreme water level), but also meet the requirements of normal operating conditions (normal water storage level to dead water level) to always obtain the upper water with higher temperature.

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

[0050] 3. Compared with the fixed front retaining wall solution, the buoyant folding 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 folding 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 folding door 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 pier is located on the upper part of the base and is arranged at intervals upstream of the water intake tower. A gate slot is arranged inside the gate pier and a top baffle is arranged on the top of the gate pier. The gate slot is wide inside and narrow outside.

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

[0061] 1) The folding gate consists of a basic fixed axis, a movable axis inside the gate slot, a movable axis outside 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;

[0065] ③ The movable axis outside the gate slot adopts equal width type and is arranged between the two gate piers;

[0066] ④ The flexible door leaf is set between the fixed axis of the foundation, the movable axis inside the door slot and the movable axis outside the door slot. It is made of waterproof flexible material with good durability. Anti-corrosion skeleton steel bars are set inside the flexible door leaf to ensure its deformation integrity.

[0067] 2) The floating rows are arranged at intervals upstream of the water intake tower and directly above the folding gate; the lateral width of the floating rows is smaller than the distance between adjacent gate piers and the width of the folding gate; the floating rows are connected by cables.

[0068] 3) The floating raft is connected to the folding gate through cables; connecting rings are set between the floating raft and the cables, and between the folding gate and the cables to ensure the strength of the connecting parts.

[0069] 4. The buoyancy provided by the floating row is greater than the gravity of the folding gate system. The length of the cable between the floating row and the folding gate can ensure that the vertical distance between the movable axis in the uppermost gate slot of the folding gate and the upstream water surface line meets the requirement of obtaining sufficient water.

Claims

1. A folding water supply system for alleviating the leakage of low-temperature storage water, including a water intake structure, characterized in that: The foldable water supply system also includes a front foldable 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 folding 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 folding water level regulating mechanism is arranged in the river channel on the upstream side of the water intake tower (1).

3. The folding water supply system for alleviating low-temperature storage water leakage according to claim 1 or 2, characterized in that: The front folding water level regulating mechanism comprises a basic support structure and a folding gate chamber regulating structure. The folding 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 a reservoir area.

4. The folding 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 folding 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 folding water supply system for alleviating the leakage of low-temperature storage water according to claim 4 is characterized in that: The folding gate chamber adjustment structure comprises a folding gate and a buoyancy drive system. The folding 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 folding water supply system for alleviating the leakage of low-temperature storage water according to claim 5 is characterized in that: The folding gate comprises a basic fixed shaft (5), a movable shaft (6) in a gate slot, a movable shaft (7) outside the gate slot, and at least four flexible door leaves (9). Each flexible door leaf (9) is hinged in the length direction through each movable shaft (6) in the gate slot and each movable shaft (7) outside the gate slot to form an integral folding door leaf. Gate slots (10) are respectively arranged on gate piers (4) on both sides of the folding door leaf. The lower end of the folding door leaf is hinged on a base (3) between two adjacent gate piers (4) through the basic fixed shaft (5), and the upper end of the folding door leaf is connected to a buoyancy drive system. During operation, the folding door leaf is limited in the gate slot (10) by the movable shaft (6) in the gate slot. The buoyancy drive system drives the folding door leaf to move back and forth vertically in the gate slot (10) by the rise and fall of the water level, and adjusts the water intake height of the water intake tower.

7. The folding 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 (11) and a cable (12), each flexible door leaf comprises an anti-corrosion skeleton steel bar (13) and a waterproof and durable flexible material (14) coated on the anti-corrosion skeleton steel bar (13), two adjacent flexible door leaves are hinged as one body through the anti-corrosion skeleton steel bar (13) extending out of the waterproof and durable flexible material (14) in cooperation with a movable shaft (6) inside the door groove or a movable shaft (7) outside the door groove, the upper end of the cable (12) is connected to the floating row (11), and the lower end of the cable (12) is connected to the upper end of the uppermost flexible door leaf.

8. The folding 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 (6) in the door slot in its horizontal plane is an I-shape with wide ends and narrow in the middle, and the projection of the gate slot (10) in its horizontal plane is a T-shape. During operation, the folding door leaf is limited by the I-shapes at its two ends and the T-shape on the gate slot (10).

9. The folding 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 folding gates is arranged between each two adjacent gate piers (4), and each set of folding gates is driven by a set of floating rows (11).

10. The folding 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 (11) is connected to a flexible floating row group via a plurality of cables (12).

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