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

Abstract

The utility model discloses a composite water supply system, particularly discloses a composite water supply system for relieving water leakage of a low-temperature reservoir, and belongs to the technical field of design and construction of water conservancy and hydropower engineering structures. The composite 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 composite water supply system comprises a water taking structure and further comprises a front composite water level adjusting mechanism, and the front composite 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 composite water supply system, in particular to a composite 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 composite 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 composite water supply system for alleviating the leakage of low-temperature reservoir water, including a water intake structure, the composite water supply system also includes a front composite water level regulating mechanism, the front composite water level regulating mechanism has an adjustable water retaining height and is arranged in the river channel in front of the water intake structure.

[0018] Furthermore, the water intake structure is a water intake tower arranged at the water intake position of the reservoir area, and the front composite 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 composite water level regulating mechanism includes a basic support structure and a composite lock chamber regulating structure, and the composite lock 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 composite gate chamber adjustment structure is enclosed in front of the water intake tower at the water intake position of the reservoir with adjustable water retaining height under the cooperation of the gate pier and the base.

[0021] The preferred embodiment of the above scheme is that the composite gate chamber adjustment structure includes a composite gate and a buoyancy drive system, and the composite 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 composite gate includes a horizontal gate slot movable axis, a vertical gate slot movable axis and two flexible door leaves. Vertical gate slots are respectively arranged on the gate piers on both sides. The horizontal gate slot is arranged on the base with the vertical gate slot as the symmetry center. The two flexible door leaves are hinged as a whole through the top edge with the vertical gate slot movable axis as the hinge axis. At least one horizontal gate slot movable axis is respectively arranged on the bottom edges of the two flexible door leaves. The two flexible door leaves are connected to the buoyancy drive system through their hinged edges. During operation, the two flexible door leaves are limited by the cooperation between the vertical gate slot movable axis and the vertical gate slot, and the cooperation between the horizontal gate slot movable axis and the horizontal gate slot; the buoyancy drive system adjusts the water intake height of the water intake tower during the process of driving the two flexible door leaves to move back and forth along the vertical gate slot by the rise and fall of the water level.

[0023] A preferred embodiment of the above scheme is that the buoyancy drive system includes a floating row and a cable, and the two flexible door leaves each include an anti-corrosion skeleton steel bar and a waterproof and durable flexible material coated on the anti-corrosion skeleton steel bar. The upper ends of the two flexible door leaves are hinged into a whole through the anti-corrosion skeleton steel bars extending out of the waterproof and durable flexible material in cooperation with the vertical door groove movable axis, the upper end of the cable is connected to the floating row, and the lower end of the cable is connected to the hinged upper ends of the two flexible door leaves through the vertical door groove movable axis.

[0024] Furthermore, the projections of the horizontal door groove movable axis and the vertical door groove movable axis in their cross sections are both set to an I-shaped structure that is wide at both ends and narrow in the middle, and the projections of the vertical gate groove and the horizontal gate groove in their respective cross sections are both set to a T-shaped structure; during the operation of the flexible door leaf, the horizontal door groove movable axis and the vertical door groove movable axis of the I-shaped structure respectively run in the T-shaped vertical gate groove and horizontal gate groove.

[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 composite gates are arranged between every two gate piers, and each set of composite 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 effect of the utility model is as follows: the technical solution provided by the present application is based on the existing water intake structure, and the composite water supply system of the present application is formed by adding a front composite water level regulating mechanism, and the front composite 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 composite 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 composite 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 This is a schematic structural diagram of the composite 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 composite 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 composite water supply system for alleviating the leakage of low-temperature storage water in the utility model in the working state of the extreme dead water level;

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

[0033] Figure 6 It is a schematic diagram of the basic support structure involved in the composite 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 composite 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, horizontal gate slot movable axis 5, vertical gate slot movable axis 6, vertical gate slot 7, horizontal gate slot 8, floating row 9, cable 10, anti-corrosion skeleton steel bar 11, waterproof and durable flexible material 12. DETAILED DESCRIPTION

[0036] like Figure 1 to Figure 7The utility model provides a composite water supply system for alleviating the discharge of low-temperature reservoir water, which can ensure that the water delivery system can obtain the specified flow of water under various operating conditions. The composite water supply system includes a water intake structure, and the composite water supply system also includes a front composite water level regulating mechanism, and the front composite 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 composite water supply system of the present application is formed by adding a front composite water level regulating mechanism, and the front composite 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 composite 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 composite water level regulating mechanism, so as to achieve the purpose of ensuring that the water delivery 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-composite water level regulating mechanism of the present application as much as possible, so as to achieve the purpose of regulating the water level of the water delivery system and facilitate construction and subsequent use, the pre-composite water level regulating mechanism of the present application includes a basic support structure and a composite lock chamber regulating structure, and the composite lock 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 composite lock 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 composite lock chamber regulating structure includes a composite gate and a buoyancy drive system, and the composite 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 composite gate described in the present application includes a horizontal gate slot movable axis 5, a vertical gate slot movable axis 6 and two flexible door leaves. Vertical gate slots 7 are respectively arranged on the gate piers 4 on both sides, and the horizontal gate slot 8 is arranged on the base 3 with the vertical gate slot 7 as the symmetry center. The two flexible door leaves are hinged as a whole through the top edge with the vertical gate slot movable axis 6 as the hinge axis. At least one horizontal gate slot movable axis 5 is respectively arranged on the bottom edges of the two flexible door leaves. The two flexible door leaves are connected to the buoyancy drive system through their hinged edges. During operation, the two flexible door leaves are respectively limited by the cooperation between the vertical gate slot movable axis 6 and the vertical gate slot 7, and the cooperation between the horizontal gate slot movable axis 5 and the horizontal gate slot 8; the buoyancy drive system adjusts the water intake height of the water intake tower during the process of driving the two flexible door leaves to move back and forth along the vertical gate slot 7 by the rise and fall of the water level. The buoyancy drive system includes a floating row 9 and a cable 10. The two flexible door leaves each include an anti-corrosion skeleton steel bar 11 and a waterproof and durable flexible material 12 coated on the anti-corrosion skeleton steel bar 11. The upper ends of the two flexible door leaves are hinged into a whole through the anti-corrosion skeleton steel bar 11 extending out of the waterproof and durable flexible material 12 in cooperation with the vertical door groove movable shaft 6. The upper end of the cable 10 is connected to the floating row 9, and the lower end of the cable 10 is connected to the upper ends of the two flexible door leaves hinged through the vertical door groove movable shaft 6.

[0038] Furthermore, in order to adapt to the operation of the flexible door leaf underwater, the present application sets the projections of the horizontal gate slot movable axis 5 and the vertical gate slot movable axis 6 in their cross sections to be an I-shaped structure with wide ends and narrow in the middle, and the projections of the vertical gate slot 7 and the horizontal gate slot 8 in their respective cross sections are set to be T-shaped structures; during the operation of the flexible door leaf, the horizontal gate slot movable axis 5 and the vertical gate slot movable axis 6 of the I-shaped structure respectively operate in the T-shaped vertical gate slot 7 and the horizontal gate slot 8. Combined with the actual working conditions of the water conservancy and hydropower project, and at the same time, appropriately reducing the volume of the floating row itself, the present application arranges a plurality of gate piers 4 on the base 3 in front of the water intake tower 1, and a set of composite gates are arranged between each two adjacent gate piers 4, and each set of composite gates is driven by a group of floating rows 9. Each group of floating rows 9 is connected to a flexible floating row group by a plurality of cables 10.

[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 composite gate 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 composite gate is connected to the bottom of the gate pier through the horizontal gate slot movable axis and can move horizontally along the horizontal gate slot to always keep the bottom of the composite gate close to the base;

[0043] 3) The composite gate is composed of a horizontal gate slot movable axis, a vertical gate slot movable axis and a flexible gate leaf. The vertical gate slot movable axis can move up and down along the vertical gate slot and drive the flexible gate leaf to expand and contract up and down, and the horizontal gate slot movable axis can retract inward or expand outward;

[0044] 4) The vertical gate slot is provided with a top boundary to limit the vertical gate slot movable axis from extending upward beyond the gate pier range;

[0045] 5) The horizontal gate slot is set with upstream and downstream boundaries, which can limit the horizontal gate slot movable axis from extending out of the gate pier range in the upstream and downstream directions;

[0046] 6) The movable axes of the horizontal and vertical gate slots are both of the “I” type, which are wide at both ends and narrow in the middle. The horizontal and vertical gate slots are both wide inside and narrow outside. The movable axes of the horizontal and vertical gate slots are always located inside the horizontal and vertical gate slots, which can ensure the lateral stability of the composite gate;

[0047] 7) The floating row and the composite gate are connected by cables. Since the buoyancy provided by the floating row is greater than the gravity of the composite gate system, under the buoyancy of the floating row, the vertical gate slot movable axis can move up and down along the vertical gate slot, and the horizontal gate slot movable axis can be retracted and expanded along the horizontal gate slot. The composite gate then has the function of rising and falling along the vertical gate slot. The vertical distance between the movable axis in the uppermost gate slot of the composite gate and the upstream water surface line is always kept fixed;

[0048] 8) The floating rafts are connected by cables to enhance the integrity of the rafts under the action of water flow.

[0049] In summary, the buoyancy-type composite 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 composite 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).

[0050] 2. The structure is stable. The buoyancy composite gate structure provided in the present application, when the reservoir operates between the normal water storage level and the extreme dead water level, the two horizontal gate slot movable axes, the one vertical gate slot movable axis and the two flexible door leaves always maintain a triangular flow, and the structure is more stable.

[0051] 3. Convenient operation and no energy consumption. The buoyancy composite gate structure provided in this application is a composite gate whose lifting and lowering are both completed by the buoyancy of reservoir water, without the need for power supply, and is relatively convenient to operate and has no energy consumption.

[0052] 4. Compared with the fixed front retaining wall solution, the buoyant composite gate 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.

[0053] The technical solution of the present application is further described below through specific embodiments:

[0054] The technical problem to be solved by the present application is to provide a buoyancy-type composite gate 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.

[0055] The technical solution adopted by this application to solve the technical problem is:

[0056] 1. A buoyancy composite gate structure for alleviating low-temperature water leakage consists of a base structure and a gate structure.

[0057] 2. The foundation structure consists of rock sill, base and gate pier.

[0058] in:

[0059] 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;

[0060] 2) The base is located on the upper part of the rock sill and is continuously arranged upstream of the water intake tower;

[0061] 3) The gate pier is located on the upper part of the base and is arranged at intervals upstream of the water intake tower; one side of the gate pier is provided with one vertical gate slot and two horizontal gate slots symmetrically distributed on both sides of the vertical gate slot; both the vertical gate slot and the horizontal gate slot are wide inside and narrow outside; the vertical gate slot is set with top and bottom boundaries, and the horizontal gate slot is set with upstream and downstream boundaries.

[0062] 3. The gate structure consists of a composite gate, cables and floating rafts.

[0063] 1) The composite gate consists of two horizontal gate slot movable axes, one vertical gate slot movable axis and two flexible door leaves.

[0064] in:

[0065] ① The movable axes of the two horizontal gate slots are both of the “I” type with wide ends and narrow middle, and are arranged in the two horizontal gate slots respectively. The length of the movable axis of the horizontal gate slot is greater than the distance between adjacent gate piers and less than the distance between adjacent gate piers + the depth of 2 horizontal gate slots;

[0066] ② The movable axis of the vertical gate slot adopts an “I” shape with wide ends and narrow middle, and is arranged in the vertical gate slot. The length of the movable axis of the vertical gate slot is greater than the distance between adjacent gate piers and less than the distance between adjacent gate piers + 2 vertical gate slot depths;

[0067] ③The two flexible door leaves are both set between the horizontal door slot movable axis and the vertical door slot movable axis. The flexible door leaves are made of waterproof flexible materials with good durability. The width is slightly smaller than the distance between adjacent gate piers. Anti-corrosion skeleton steel bars are set in the flexible door leaves to ensure its deformation integrity.

[0068] 2) The floating rows are arranged at intervals upstream of the water intake tower and directly above the composite gate; the lateral width of the floating rows is smaller than the distance between adjacent gate piers and the width of the composite gate; the floating rows are connected by cables.

[0069] 3) The floating raft is connected to the composite gate through cables; connecting rings are set between the floating raft and the cables, and between the composite gate and the cables to ensure the strength of the connecting parts.

[0070] 4. The buoyancy provided by the floating row is greater than the gravity of the composite gate system. The length of the cable between the floating row and the composite gate can ensure that the vertical distance between the movable axis of the uppermost vertical gate slot of the composite gate and the upstream water surface line meets the requirement of obtaining sufficient water.

Claims

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

3. The composite water supply system for alleviating low-temperature storage water leakage according to claim 1 or 2, characterized in that: The front composite water level regulating mechanism comprises a foundation support structure and a composite lock chamber regulating structure. The composite lock chamber regulating structure is arranged in cooperation with the foundation 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 composite water supply system for alleviating low-temperature storage water leakage 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 composite 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 composite water supply system for alleviating low-temperature storage water leakage according to claim 4 is characterized in that: The composite gate chamber regulating structure comprises a composite gate and a buoyancy drive system. The composite 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 composite water supply system for alleviating low-temperature storage water leakage according to claim 5 is characterized in that: The composite gate comprises a horizontal gate slot movable shaft (5), a vertical gate slot movable shaft (6) and two flexible gate leaves. Vertical gate slots (7) are respectively arranged on gate piers (4) on both sides. A horizontal gate slot (8) is arranged on a base (3) with the vertical gate slot (7) as a symmetric center. The two flexible door leaves are hinged as a whole through the top edge with the vertical gate slot movable shaft (6) as a hinge shaft. At least one horizontal gate slot movable shaft (5) is respectively arranged on the bottom edge of the two flexible door leaves. The two flexible door leaves are connected to a buoyancy drive system through their hinged edges. During operation, the two flexible door leaves are respectively limited by the cooperation of the vertical gate slot movable shaft (6) and the vertical gate slot (7) and the cooperation of the horizontal gate slot movable shaft (5) and the horizontal gate slot (8); the buoyancy drive system adjusts the water intake height of the water intake tower in the process of driving the two flexible door leaves to move back and forth along the vertical gate slot (7) by the rise and fall of the water level.

7. The composite water supply system for alleviating low-temperature storage water leakage according to claim 6 is characterized in that: The buoyancy drive system comprises a floating row (9) and a cable (10), and two flexible door leaves respectively comprise an anti-corrosion skeleton steel bar (11) and a waterproof and durable flexible material (12) coated on the anti-corrosion skeleton steel bar (11). The upper ends of the two flexible door leaves are hinged into a whole through the anti-corrosion skeleton steel bar (11) extending out of the waterproof and durable flexible material (12) in cooperation with a vertical door groove movable shaft (6), the upper end of the cable (10) is connected to the floating row (9), and the lower end of the cable (10) is connected to the hinged upper ends of the two flexible door leaves through the vertical door groove movable shaft (6).

8. The composite water supply system for alleviating low-temperature storage water leakage according to claim 7 is characterized in that: The projections of the horizontal door slot movable axis (5) and the vertical door slot movable axis (6) in their cross sections are both arranged as an I-shaped structure with wide ends and narrow in the middle, and the projections of the vertical gate slot (7) and the horizontal gate slot (8) in their respective cross sections are both arranged as a T-shaped structure; during the operation of the flexible door leaf, the horizontal door slot movable axis (5) and the vertical door slot movable axis (6) of the I-shaped structure respectively operate in the T-shaped vertical gate slot (7) and the horizontal gate slot (8).

9. The composite water supply system for alleviating low-temperature storage water leakage 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 composite gates is arranged between each two adjacent gate piers (4), and each set of composite gates is driven by a set of floating rows (9).

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

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