Reservoir discharged water temperature regulation and control device

Abstract

The invention provides a regulation and control device for the discharged water temperature of a reservoir. The reservoir discharged water temperature regulation and control device comprises a power station water inlet tower, cable-stayed towers, a supporting platform and a water retaining system, the cable-stayed towers are arranged on the two sides of a water inlet of the power station water inlet tower respectively, the supporting platform is in a horizontal circular arch shape, the two ends of the supporting platform are connected with the cable-stayed towers, and the water retaining system is connected with the cable-stayed towers. The water retaining system is connected to the circular-arch-shaped supporting platform and extends towards the lower portion of the reservoir. The water retaining system comprises a stand column, lantern rings, a water retaining curtain and an elevator, the stand column is sleeved with the multiple lantern rings, the water retaining curtain is connected to the supporting platform and the multiple lantern rings, and the elevator is connected with the lantern ring at the upper end. The cable-stayed towers are arranged on the two sides of the water inlet of the power station water inlet tower, the technical scheme that a water retaining system is implemented on a single-side bank slope is achieved, a main river channel is not blocked, and flood loads do not need to be borne in the flood discharge working condition.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy and hydropower engineering and ecological environment protection, and in particular to a reservoir downstream water temperature control device. Background Art

[0002] After the reservoir with a large ratio of storage capacity to annual river runoff is filled, the water temperature in the reservoir area shows obvious vertical stratification. As the water depth increases, the water temperature gradually decreases. For example, the temperature difference between the bottom and surface water in some reservoirs in the south can reach 20°C. Since the location of the water intake for outflow water is generally lower than the dead water level, water from the middle and lower layers is usually taken, which is generally 2-13°C lower than the water temperature of the natural river downstream.

[0003] Low-temperature water discharged from the reservoir affects the water ecology of the downstream river, and the entire life cycle of aquatic animals, especially rare fish, is affected, and even loses the suitable spawning environment. Low-temperature water irrigation will also affect the metabolism of crops, leading to a reduction in crop yields, such as a reduction of more than 20% in peanut pods and 32.1% to 56.5% in rice, which has a serious impact on agricultural production and farmers' income.

[0004] Existing water-blocking curtain walls, such as the floating and hanging combined flexible water-blocking curtain disclosed in patent application publication number CN104878728A, and the segmented curtain water-blocking structure disclosed in patent application publication number CN106638482A, both have cable towers built on the left and right banks of the river to form the support points of the water-blocking system. For reservoirs with poor geological conditions where both banks cannot have the conditions for building cable towers at the same time, this technology does not meet the implementation conditions.

[0005] When selecting a dam site for a hydropower station, the geological conditions on at least one side of the bank slope must be suitable for the arrangement of hydraulic structures such as the hydropower station intake tower, while the bank slope on the other side with poor geological conditions only needs to be treated. However, in principle, no engineering construction will be carried out on the treated bank slope.

[0006] On the other hand, the water-blocking curtain wall technology can effectively block low-temperature water by setting up cable towers on the left and right banks of the river and tensioning the water retaining system to block the river. However, for some power stations with extremely large flood discharge, the structural load under flood discharge conditions increases significantly, and the risk of damage is high. Summary of the invention

[0007] The purpose of the present invention is to provide a reservoir discharge water temperature control device which can be implemented by using only a single-side bank slope, and to manage low-temperature water without directly bearing the impact of floods.

[0008] The technical solution of the present invention is: a reservoir downstream water temperature control device, comprising a power station water intake tower, a cable-stayed tower, a support platform and a water retaining system, wherein the cable-stayed towers are arranged on both sides of the water inlet of the power station water intake tower, the support platform is a horizontal round arch, and both ends of the support platform are connected to the cable-stayed tower, the water retaining system is connected to the round arch support platform, and the water retaining system extends to the lower part of the reservoir; The water retaining system includes columns, collars, water retaining curtains and hoists. There are multiple columns evenly distributed along the supporting platform, and each column is provided with multiple collars. The two ends of the water retaining curtain are connected to the two ends of the supporting platform. The water retaining curtain is connected to multiple collars at the same time. Except for the ends, the rest of the water retaining curtain rises and falls together with the collars. The hoist is installed on the supporting platform, and the hoist is connected to the collar at the upper end.

[0009] In the above scheme, cable-stayed towers are arranged on both sides of the water inlet of the power station's water intake tower, thereby realizing the technical scheme of implementing the water retaining system on a single-sided slope, without blocking the main river channel, and the flood discharge condition does not need to bear the flood load; in addition, the supporting platform is designed to be a circular arch, so that the water retaining system can partially enclose the power station's water intake tower, which has a lower technical cost than the method of blocking the main river channel; and the lifting and lowering of the water retaining curtain is controlled by the hoisting machine to drive the sleeve ring, so that the lifting and lowering adjustment has better operability, reducing the difficulty of raising and lowering the water retaining curtain in the water area.

[0010] Preferably, the water retaining system further comprises a lifting bracket for connecting the collar, the lifting bracket is a scissor-type structure to form a plurality of middle hinge points and side hinge points, the collar is provided with an edge slide matched with the side hinge points, the column is provided with a middle slide matched with the middle hinge point, and the bottom of the lifting bracket is connected with the bottom of the column. The lifting bracket with a scissor-type structure can make the vertical spacing of the collars on each column uniform when the water retaining curtain is raised and lowered, so that the water retaining curtain is evenly stressed under different water level conditions, effectively reducing stress concentration.

[0011] In order to prevent the ring from tilting and getting stuck when sliding, a roller groove is provided on the inner wall of the ring. The roller groove and the edge slide groove are located on two adjacent side walls of the ring. A roller is rotatably provided in the roller groove, and the roller is in rolling contact with the column.

[0012] Preferably, the hoist includes a winch and a connecting wire, the winch is installed on the supporting platform, one end of the connecting wire is wound around the winch, and the other end of the connecting wire is connected to a ring at the upper end.

[0013] Preferably, the water retaining system further comprises a plurality of transverse cables and longitudinal cables which are arranged in a staggered manner in both horizontal and vertical directions. The transverse cables and longitudinal cables are arranged on the downstream side of the water retaining curtain, and an underwater anchor is provided at the lower end of each longitudinal cable.

[0014] Preferably, a buoy is provided on the upper end of the water retaining curtain, and the buoy can drive the water retaining curtain to rise and fall as the water level changes.

[0015] Preferably, the reservoir downstream water temperature control device further comprises a plurality of anchor piers connected to the inclined tower, and each of the anchor piers is anchored to the bank slope of the reservoir.

[0016] Preferably, the reservoir downstream water temperature control device also includes a cable connecting the inclined tower and the supporting platform.

[0017] Compared with the related art, the present invention has the following beneficial effects: 1. The reservoir discharge water temperature control device is provided with inclined towers on both sides of the water flow direction of the power station intake tower, and a support platform and a water retaining system are provided on the inclined towers, thereby realizing a technical solution implemented on the same side bank slope, without blocking the main river channel, and the flood discharge condition does not need to bear the flood load; Second, the reservoir discharge water temperature control device designs the support platform into a round arch shape, so that the water retaining system partially encloses the power station water intake tower. Compared with the method of blocking the main river channel, the technical cost is lower, and the support platform of the round arch structure has better force bearing capacity, which is conducive to supporting the water retaining curtain and making it withstand the scouring force of the river water; 3. The reservoir discharge water temperature control device is designed with a scissor-type lifting bracket, and the height of the collar and the water retaining curtain is lifted by the lifting mechanism, so that the water retaining system is evenly stressed under different water level conditions, effectively reducing stress concentration, reducing the risk of structural damage, and being more conducive to the use of the water retaining curtain; Fourth, the present invention can be implemented with only a single bank slope, and is suitable for hydropower stations with poor geological conditions on the bank slope opposite to the water intake tower; 5. The present invention can block low-temperature water in a reservoir that has already stored water, thereby increasing the temperature of water discharged from the reservoir. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of the reservoir discharge water temperature control device provided by the present invention at the dead water level; Figure 2 for Figure 1 Side view of Figure 3 for Figure 1 Schematic diagram of the lifting bracket after it is lowered; Figure 4 A schematic diagram of the structure of the reservoir discharge water temperature control device provided by the present invention at a normal water storage level; Figure 5 for Figure 4 Side view of Figure 6 for Figure 4Schematic diagram of the lifting bracket after it is raised; Figure 7 For along Figure 6 AA cross-sectional view in FIG. Figure 8 For along Figure 7 BB cross-sectional view in FIG. Fig. 9 For along Figure 7 A schematic diagram of the CC section view and rotation 90 degrees; Fig.10 A schematic top view of the reservoir downstream water temperature control device provided by the present invention.

[0019] In the attached figure: 1. Power station water intake tower; 2. Cable-stayed tower; 3. Cable-stayed cable; 4. Anchor pier; 5. Support platform; 6. Ring; 7. Underwater anchor; 8. Longitudinal cable; 9. Horizontal cable; 10. Water retaining curtain; 11. Column; 12. Buoy; 13. Winch; 14. River channel line before power station water storage; 15. Normal water level submergence line of power station; 16. Water retaining dam; 17. Middle chute; 18. Connecting line; 19. Lifting bracket; 20. Middle hinge point; 21. Side hinge point; 22. Roller; 23. Roller groove; 24. Edge chute; 25. Water retaining system; 26. Hoist. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0021] like Figure 1 , Figure 2 As shown, a reservoir discharge water temperature control device provided in this embodiment includes a power station water intake tower 1, a cable-stayed tower 2, cable-stayed cables 3, anchor piers 4, a support platform 5 and a water retaining system 25.

[0022] like Fig.10 As shown, the power station water intake tower 1 is arranged in the river channel and close to a bank slope on one side. A water retaining dam 16 is arranged on one side of the power station water intake tower 1. Fig.10 The middle number 14 is the river channel line before the power station is filled with water, and the number 15 is the flooding line of the normal water level of the power station. The inclined towers 2 are arranged on both sides of the water inlet of the power station water inlet tower 1. The support platform 5 is a horizontal round arch, and both ends of the support platform 5 are connected to the inclined towers 2. The inclined cable 3 connects the inclined tower 2 and the support platform 5. The anchor pier 4 is anchored on the bank slope of the reservoir, and the inclined cable 3 passes through the inclined tower 2 and is connected to the anchor pier 4.

[0023] like Figure 1 , Figure 2 As shown, the water retaining system 25 includes a column 11, a collar 6, a water retaining curtain 10, a hoist 26, a lifting bracket 19 for connecting the collar 6, and a plurality of horizontal cables 9 and longitudinal cables 8 arranged in a staggered manner. A plurality of columns 11 are evenly distributed along the support platform 5, the bottom of the column 11 is inserted into the riverbed, and the top of the column 11 supports the support platform 5. The water retaining system 25 is fixed together by the column 11 and the support platform 5. The deadweight of the support platform 5 is transferred to the inclined tower 2.

[0024] The cross section of the column 11 is rectangular. Figure 7 As shown, among the four sides of the column 11, two opposite sides are provided with a middle slide groove 17, and the middle slide groove 17 extends along the axial direction of the column 11 (as shown in FIG. Figure 3 as shown).

[0025] like Figure 6 As shown, each of the uprights 11 is provided with a plurality of collars 6. The lifting bracket 19 is a scissor-type structure to form a plurality of middle hinge points 20 and side hinge points 21. Figure 6 , Figure 7 As shown, the collar 6 is provided with an edge slide groove 24 adapted to the edge hinge point 21. Figure 8 As shown, the edge slide groove 24 is a horizontally extending waist-shaped hole, and the edge hinge point 21 is slidably placed in the waist-shaped hole. The middle slide groove 17 on the column 11 is adapted to the middle hinge point 20. The bottom of the lifting bracket 19 is connected to the bottom of the column 11.

[0026] like Figure 7 , Fig. 9 As shown, a roller groove 23 is provided on the inner wall of the collar 6. The roller groove 23 and the edge slide groove 24 are located on two adjacent side walls of the collar 6, and a roller 22 is rotatably provided in the roller groove 23, and the roller 22 is in rolling contact with the column 11.

[0027] like Figure 1 , Figure 2 As shown, the two ends of the water retaining curtain 10 are connected to the two ends of the supporting platform 5 , and the water retaining curtain 10 is connected to a plurality of the collars 6 at the same time. Except for the ends, the rest of the water retaining curtain 10 rises and falls together with the collars 6 .

[0028] The water retaining curtain 10 is connected with a plurality of transverse cables 9 and longitudinal cables 8 arranged in a staggered manner, and the transverse cables 9 and longitudinal cables 8 are located on the downstream side of the water retaining curtain 10. The lower end of each longitudinal cable 8 is provided with an underwater anchor 7 for anchoring to the bottom of the reservoir. A plurality of collars 6 are connected to the transverse cables 9 at corresponding positions of the water retaining curtain 10. A long strip buoy 12 is fixed to the upper end of the water retaining curtain 10, and the buoyancy of the buoy 12 is slightly lower than the buoyancy of the water retaining curtain 10 and the collar 6, so as to reduce the deadweight of the water retaining system 25 and the collar 6.

[0029] The hoist 26 is installed on the support platform 5, and the hoist 26 is arranged one by one with the columns 11. Figure 1 , Figure 3 As shown, the hoist 26 includes a winch 13 and a connecting line 18. The winch 13 is installed on the supporting platform 5, one end of the connecting line 18 rotates on the winch 13, and the other end of the connecting line 18 is connected to the collar 6 located at the upper end. By controlling the winch 13, the length of the connecting line 18 is adjusted to control the lifting and lowering of the water retaining curtain 10. The roller 22 ensures that the collar 6 does not tilt or get stuck when the water retaining curtain 10 is lifted or lowered. The edge hinge point 21 is adapted to the edge slide groove 24, so that the vertical spacing of the collar 6 on each column 11 is uniform when the water retaining curtain is lifted or lowered, thereby making the water retaining curtain 10 evenly stressed under different water level conditions, effectively reducing stress concentration.

[0030] When the reservoir is at a normal water level, the water retaining curtain 10 is lifted to form a barrier (such as Figure 4 , Figure 5 as shown). Example

[0031] The normal water storage level of a hydropower station is 380m, and the dead water level is 340m. The water inlet of the power station is located on the left bank. There are loose landslides on the opposite side of the water inlet tower and on the right bank of the river that have been managed, and the conditions for engineering construction are not met. The water inlet tower 1 of the power station is 100m wide, with a bottom elevation of 310m and a top elevation of 390m. According to the requirements of the ecological environment, this project needs to use surface water at normal temperature within 20m of the water meter.

[0032] First, the underwater anchors 7 are constructed: there are 12 underwater anchors 7 in total, and after the construction is completed, a traction rope is reserved on the underwater anchors 7.

[0033] The water level of this power station is lower than 350m for about three months in a normal water year, which meets the construction conditions of the inclined tower 2 foundation. Therefore, the inclined tower 2 and the supporting platform 5 are symmetrically built on both sides of the power station water inlet at an elevation of 350m. The material is reinforced concrete structure. The inclined tower 2 is 390m high and the axis spacing is 140m. The supporting platform 5 has a span of 140m, a rise of 70m, a cross-section width of 20m and a height of 10m. The inclined tower 2 and the supporting platform 5 are fixed by the inclined cables 3 and anchor piers 4 made of multiple bundles of high-strength steel wire ropes.

[0034] Four square holes with a length of 3m and a width of 3m are set on the support platform 5. The column 11 has a square cross-section with a side length of 3m, a T-shaped middle chute 17 with a width of 20cm on both sides, an inner width of 40cm, and a depth of 30cm. The middle chute 17 is lined with a carbon fiber plate to improve the wear resistance of the middle chute 17 and reduce friction. The static pressure pile construction process is used to press the column 11 into the underwater riverbed and fix it to the support platform 5. Then the winch 13 is installed on the column 11, and the connecting wire 18 of steel strand material with a diameter of 18cm is lowered into the water along the wire trough (the middle chute 17 can be used).

[0035] The collar 6 on the column 11 is made of stainless steel, with a ring thickness of 30cm, and an inner width and height of 3.01m. The lifting bracket 19 is made of stainless steel. The lifting bracket 19 and the collar 6 are processed and connected in the factory. For ease of installation, all the collars 6 are divided into two halves, each connected to a set of lifting brackets 19. When the water level is lower than the bottom of the supporting platform 5, the collar 6 is transported to the position of the column 11 by a ship, and connected to the column 11 and the connecting line 18 after being assembled by bolts. Then, a floating platform is laid on the bottom of the supporting platform 5, and the horizontal cable 9, the longitudinal cable 8, and the water curtain 10 are laid on the floating platform. Connect the traction rope to the bottom end of the longitudinal cable 8, and connect the two ends of the horizontal cable 9 to the collar 6 on the column 11. Finally, the water curtain 10 is sunk by the traction rope and the floating platform on the water surface. Then remove the ship and the floating platform to complete the construction.

[0036] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A reservoir discharge water temperature control device, comprising a power station water intake tower (1), characterized in that: It also comprises an inclined tower (2), a supporting platform (5) and a water retaining system (25), wherein the inclined tower (2) is arranged on both sides of the water inlet of the power station water inlet tower (1), the supporting platform (5) is in the shape of a horizontal circular arch, both ends of the supporting platform (5) are connected to the inclined tower (2), the water retaining system (25) is connected to the circular arch-shaped supporting platform (5), and the water retaining system (25) extends toward the lower part of the reservoir; The water retaining system (25) comprises a column (11), a collar (6), a water retaining curtain (10) and a hoist (26); a plurality of the columns (11) are evenly distributed along the support platform (5); a plurality of collars (6) are sleeved on each of the columns (11); two ends of the water retaining curtain (10) are connected to two ends of the support platform (5); the water retaining curtain (10) is simultaneously connected to the plurality of collars (6); and the remaining parts of the water retaining curtain (10) except the ends are lifted and lowered together with the collars (6); the hoist (26) is installed on the support platform (5); and the hoist (26) is connected to the collar (6) at the upper end.

2. The reservoir discharge water temperature control device according to claim 1, characterized in that: The water retaining system (25) further comprises a lifting bracket (19) for connecting the collar (6); the lifting bracket (19) is a scissor-type structure to form a plurality of middle hinge points (20) and side hinge points (21); the collar (6) is provided with an edge slide groove (24) adapted to the side hinge points (21); the column (11) is provided with a middle slide groove (17) adapted to the middle hinge point (20); and the bottom of the lifting bracket (19) is connected to the bottom of the column (11).

3. The reservoir discharge water temperature control device according to claim 2, characterized in that: A roller groove (23) is provided on the inner wall of the collar (6); the roller groove (23) and the edge slide groove (24) are located on two adjacent side wall surfaces of the collar (6); a roller (22) is rotatably provided in the roller groove (23); and the roller (22) is in rolling contact with the column (11).

4. The reservoir discharge water temperature control device according to claim 1, characterized in that: The hoist (26) comprises a winch (13) and a connecting line (18), wherein the winch (13) is installed on the supporting platform (5), one end of the connecting line (18) is wound around the winch (13), and the other end of the connecting line (18) is connected to a ring (6) at the upper end.

5. The reservoir discharge water temperature control device according to claim 1, characterized in that: The water retaining system (25) further comprises a plurality of transverse cables (9) and longitudinal cables (8) arranged in a staggered manner in a horizontal and vertical manner. The transverse cables (9) and longitudinal cables (8) are arranged on the downstream side of the water retaining curtain (10), and an underwater anchor (7) is provided at the lower end of each longitudinal cable (8).

6. The reservoir discharge water temperature control device according to claim 1, characterized in that: A buoy (12) is provided at the upper end of the water retaining curtain (10).

7. The reservoir discharge water temperature control device according to claim 1, characterized in that: It also comprises a plurality of anchor piers (4) connected to the inclined tower (2), each of the anchor piers (4) being anchored to the bank slope of the reservoir.

8. The reservoir discharge water temperature control device according to claim 1, characterized in that: It also includes a stay cable (3) connecting the stay tower (2) and the support platform (5).

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