A device for regulating the temperature of the water discharged from a reservoir

Abstract

The present invention provides a device for regulating the water temperature discharged from a reservoir. The device for regulating the water temperature discharged from the reservoir includes a power station intake tower, a cable-stayed tower, a support platform and a water retaining system. The cable-stayed towers are respectively arranged on both sides of the water inlet of the power station intake tower. The support platform is a horizontal circular arch, and both ends of the support platform are connected to the cable-stayed towers. The water retaining system is connected to the circular-arch-shaped support platform and extends downward to the lower part of the reservoir. The water retaining system includes columns, collar rings, a water retaining curtain and a hoist. A plurality of collar rings are sleeved on the columns. The water retaining curtain is connected to the support platform and the plurality of collar rings. The hoist is connected to the upper collar ring. By arranging the cable-stayed towers on both sides of the water inlet of the power station intake tower, the present invention realizes the technical solution of implementing the water retaining system on a single-side bank slope, without blocking the main river channel, and the flood discharge condition does not need to bear the flood load.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy and hydropower engineering and ecological environment protection, and particularly relates to a device for regulating the temperature of discharged water from a reservoir. Background Art

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

[0003] The discharged low-temperature water affects the water ecology of the downstream river channel, and the entire life cycle of aquatic animals, especially rare fish, is affected, and even the suitable spawning environment is lost. Low-temperature water irrigation will also affect the metabolism of crops, resulting in crop yield reduction. For example, the peanut pod yield is reduced by more than 20%, and the rice yield is reduced by 32.1% - 56.5%, which has a serious impact on agricultural production increase and farmers' income increase.

[0004] Existing water isolation curtains, such as a floating and hanging combined flexible water retaining curtain disclosed in the patent application publication No. CN104878728A, and a segmented curtain water retaining structure disclosed in the patent application publication No. CN106638482A, both of which respectively construct cable towers on the left and right banks of the river to form the support points of the water retaining system. For reservoirs with poor geological conditions where the conditions for constructing cable towers cannot be met on both banks at the same time, this technology does not have the implementation conditions.

[0005] For the selection of the dam site of a hydropower station, at least one side of the bank slope should have geological conditions suitable for arranging hydraulic structures such as the intake tower of the hydropower station, and the other side of the bank slope with poor geological conditions only needs to be treated. However, for the treated bank slope, engineering construction is generally not carried out anymore.

[0006] On the other hand, the water isolation curtain technology can effectively block low-temperature water by setting 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 flows, the structural load under the flood discharge condition increases significantly, and the risk of damage is high. Summary of the Invention

[0007] The purpose of the present invention is to provide a device for regulating the temperature of discharged water from a reservoir that can be implemented only by using one-sided bank slope, and for the treatment of low-temperature water that does not directly bear 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;

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] Preferably, the water retaining system further includes a plurality of horizontal cables and vertical cables arranged in a crisscross pattern. The horizontal cables and vertical cables are arranged on the downstream side of the water retaining curtain. An underwater anchor is provided at the lower end of each vertical cable.

[0015] Preferably, a buoy is provided at the upper end of the water retaining curtain. The buoy can drive the water retaining curtain to rise and fall with the change of water level.

[0016] Preferably, the reservoir water discharge temperature control device further includes a plurality of anchor piers connected to the cable-stayed tower, and each anchor pier is anchored to the bank slope of the reservoir.

[0017] Preferably, the reservoir water discharge temperature control device further includes a cable stayed cable connecting the cable-stayed tower and the support platform.

[0018] Compared with the related art, the beneficial effects of the present invention are as follows:

[0019] First, the reservoir water discharge temperature control device sets cable-stayed 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 arranged on the cable-stayed towers. Thus, the technical solution implemented on the same side of the bank slope can be realized, without blocking the main river channel, and the flood discharge condition does not need to bear the flood load.

[0020] Second, the reservoir water discharge temperature control device designs the support platform as a circular arch shape, so that the water retaining system locally encloses the power station intake tower. Compared with the way of blocking the main river channel, the technical cost is lower, and the support platform with a circular arch structure has better stress performance, which is beneficial to supporting the water retaining curtain and enabling it to withstand the scouring force of the river water.

[0021] Third, the reservoir water discharge temperature control device designs a scissor-type lifting bracket, and the height of the lifting collar and the water retaining curtain is lifted through a lifting mechanism, so that the water retaining system is uniformly stressed under different water level conditions, effectively reducing stress concentration and reducing the risk of structural damage, which is more conducive to the use of the water retaining curtain.

[0022] Fourth, the present invention only needs to be implemented on one side of the bank slope, and is applicable to hydropower stations with poor geological conditions on the opposite bank slope of the intake tower.

[0023] Fifth, the present invention can block low-temperature water in the impounded reservoir and improve the water discharge temperature of the reservoir. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the reservoir water discharge temperature control device provided by the present invention at the dead water level;

[0025] Figure 2 It is Figure 1 a side view of

[0026] Figure 3 It is Figure 1Schematic diagram after the lifting support descends;

[0027] Figure 4 Schematic diagram of the reservoir water discharge temperature control device provided by the present invention at the normal storage level;

[0028] Figure 5 is Figure 4 side view;

[0029] Figure 6 is Figure 4 Schematic diagram after the lifting support in [[ ]] ascends;

[0030] Figure 7 is the [[ ]] Figure 6 A - A sectional view schematic diagram in [[ ]];

[0031] Figure 8 is the [[ ]] Figure 7 B - B sectional view schematic diagram in [[ ]];

[0032] Figure 9 is the [[ ]] Figure 7 Schematic diagram after the C - C section in [[ ]] is rotated 90 degrees;

[0033] Figure 10 Top view schematic diagram of the reservoir water discharge temperature control device provided by the present invention.

[0034] In the drawings: 1. Power station intake tower; 2. Cable - stayed tower; 3. Cable - stayed cable; 4. Anchor pier; 5. Support platform; 6. Collar; 7. Underwater anchor; 8. Longitudinal cable; 9. Transverse cable; 10. Water - retaining curtain; 11. Column; 12. Floating drum; 13. Hoist; 14. River line before power station water storage; 15. Submerged line at normal storage level of power station; 16. Water - retaining dam; 17. Middle chute; 18. Connecting line; 19. Lifting support; 20. Middle hinge point; 21. Edge hinge point; 22. Roller; 23. Roller groove; 24. Edge chute; 25. Water - retaining system; 26. Hoist. Detailed implementation manners

[0035] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. For the convenience of description, words such as "upper", "lower", "left", and "right" in the following text only represent the same directions as the upper, lower, left, and right directions of the drawings themselves, and do not limit the structure.

[0036] As shown in [[ ]] Figure 1 and Figure 2 a reservoir water discharge temperature control device provided in this embodiment includes a power station intake tower 1, a cable - stayed tower 2, a cable - stayed cable 3, an anchor pier 4, a support platform 5, and a water - retaining system 25.

[0037] As Figure 10 shown, the intake tower 1 of the power station is arranged in the river channel and close to one side slope. A water retaining dam 16 is arranged on one side of the intake tower 1 of the power station. Figure 10 In the figure, reference numeral 14 is the river channel line before the power station stores water, and reference numeral 15 is the inundation line at the normal storage level of the power station. On both sides of the water inlet of the intake tower 1 of the power station, the cable-stayed towers 2 are respectively arranged. The support platform 5 is a horizontal circular arch, and both ends of the support platform 5 are connected to the cable-stayed towers 2. The cable stays 3 connect the cable-stayed towers 2 and the support platform 5. The anchor piers 4 are anchored to the slope of the reservoir, and the cable stays 3 pass through the cable-stayed towers 2 and are connected to the anchor piers 4.

[0038] As Figure 1 、 Figure 2 shown, the water retaining system 25 includes columns 11, collar rings 6, water retaining curtain cloths 10, hoists 26, lifting brackets 19 for connecting the collar rings 6, and a plurality of horizontal cables 9 and vertical cables 8 arranged horizontally and vertically in a crisscross 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 jointly fixed by the columns 11 and the support platform 5. The self-weight of the support platform 5 is transmitted to the cable-stayed towers 2.

[0039] The cross-section of the column 11 is rectangular. As Figure 7 shown, among the four side surfaces of the column 11, middle sliding grooves 17 are arranged on two opposite side surfaces, and the middle sliding grooves 17 extend along the axial direction of the column 11 (as Figure 3 shown).

[0040] As Figure 6 shown, a plurality of collar rings 6 are sleeved on each column 11. The lifting bracket 19 is a scissor structure to form a plurality of middle hinge points 20 and edge hinge points 21. As Figure 6 、 Figure 7 shown, edge sliding grooves 24 adapted to the edge hinge points 21 are arranged on the collar rings 6. As Figure 8 shown, the edge sliding grooves 24 are horizontally extending waist-shaped holes, and the edge hinge points 21 slide in the waist-shaped holes. The middle sliding grooves 17 on the column 11 are adapted to the middle hinge points 20. The bottom of the lifting bracket 19 is connected to the bottom of the column 11.

[0041] As Figure 7 、 Figure 9 shown, roller grooves 23 are arranged on the inner wall of the collar ring 6. The roller grooves 23 and the edge sliding grooves 24 are located on two adjacent side walls of the collar ring 6. Rollers 22 are rotatably arranged in the roller grooves 23, and the rollers 22 are in rolling contact with the column 11.

[0042] AsFigure 1 , Figure 2 As shown in Figure 2 , both ends of the water retaining curtain 10 are connected to both ends of the support platform 5. The water retaining curtain 10 is simultaneously connected to a plurality of the collars 6, and the other parts of the water retaining curtain 10 except the ends are lifted and lowered together with the collars 6.

[0043] A plurality of horizontally and vertically criss-crossed horizontal cables 9 and vertical cables 8 are connected to the water retaining curtain 10, and the horizontal cables 9 and vertical cables 8 are located on the downstream side of the water retaining curtain 10. An underwater ground anchor 7 for anchoring with the reservoir bottom is provided at the lower end of each vertical cable 8. A plurality of the collars 6 are connected to the horizontal cables 9 at corresponding positions of the water retaining curtain 10. A long strip-shaped floating drum 12 is fixed at the upper end of the water retaining curtain 10, and the buoyancy of the floating drum 12 is slightly lower than the floating weight of the water retaining curtain 10 and the collars 6 to reduce the self-weight of the water retaining system 25 and the collars 6.

[0044] The hoist 26 is installed on the support platform 5, and the hoist 26 is arranged corresponding to the columns 11 one by one. As Figure 1 , Figure 3 shown in Figure 3 , the hoist 26 includes a hoist drum 13 and a connecting line 18. The hoist drum 13 is installed on the support platform 5, one end of the connecting line 18 is wound around the hoist drum 13, and the other end of the connecting line 18 is connected to the collar 6 located at the upper end. By controlling the hoist drum 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 when the water retaining curtain 10 is lifted and lowered, the collar 6 is not tilted and not jammed. The side hinge points 21 are adapted to the edge sliding grooves 24, so that the vertical spacing of the collars 6 on each column 11 is uniform when the water retaining curtain is lifted and lowered, whereby the water retaining curtain 10 can be uniformly stressed under different water level conditions and effectively reduce stress concentration.

[0045] When the reservoir is at the normal storage level, the water retaining curtain 10 is lifted to form a barrier (as Figure 4 , Figure 5 shown in Figure 4 and Figure 5 ). Embodiment

[0046] For a certain hydropower station, the normal storage level is 380 m and the dead water level is 340 m. The intake of the power station is located on the left bank. There is a loose landslide body on the high and steep slope on the right bank of the river opposite to the intake tower, and it does not meet the engineering construction conditions. The intake tower 1 of the power station is 100 m wide, the bottom elevation is 310 m, and the top elevation is 390 m. According to the requirements of the ecological environment, this project needs to take the surface normal temperature water within 20 m of the water meter.

[0047] First, the construction of the underwater ground anchor 7 is carried out: The total number of the underwater ground anchors 7 is 12, and a towing rope is reserved on the underwater ground anchor 7 after the construction is completed.

[0048] During the normal water year, the water level of this power station is lower than 350m for about 3 months, which meets the construction conditions of the foundation of Cable-stayed Tower 2. Therefore, Cable-stayed Tower 2 and Support Platform 5 are symmetrically built on both sides of the water inlet of the power station at an elevation of 350m, and the material is reinforced concrete structure. Among them, Cable-stayed Tower 2 is 390m high and the axial distance is 140m. Support Platform 5 has a span of 140m, a rise of 70m, a cross-section width of 20m and a height of 10m. Cable-stayed Tower 2 and Support Platform 5 are fixed by stay cables 3 made of multiple bundles of high-strength steel wires and anchor piers 4.

[0049] Four square holes with a length and width of 3m are arranged on Support Platform 5. The column 11 has a square cross-section with a side length of 3m, and the middle chute 17 of the T-shaped with an opening width of 20cm, an inner width of 40cm and a depth of 30cm on both sides. The middle chute 17 is lined with carbon fiber board to improve the wear resistance and reduce the friction force of the middle chute 17. The static pressure pile construction technology is adopted to press the column 11 into the underwater riverbed and fix it with Support Platform 5. Then, a winch 13 is installed on the column 11, and the connecting wire 18 made of steel strand with a diameter of 18cm is lowered into the water along the wire groove (the middle chute 17 can be borrowed).

[0050] The collar 6 on the column 11 is made of stainless steel, with a ring thickness of 30cm, and the inner width and height are both 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 the convenience of installation, all the collars 6 are divided into two halves, and each is connected to a set of lifting brackets 19. When the water level is lower than the bottom of Support Platform 5, the collar 6 is transported to the position of the column 11 by boat, and after being bolted together, it is connected to the column 11 and the connecting wire 18. Then, a floating platform is laid at the bottom of Support Platform 5, and the cross cable 9, longitudinal cable 8 and water curtain 10 are laid on the floating platform. The towing rope is connected to the bottom end of the longitudinal cable 8, and both ends of the cross cable 9 are connected to the collar 6 on the column 11. Finally, the water curtain 10 is sunk by the cooperation of the towing rope and the floating platform. Subsequently, the boat and the floating platform are removed to complete the project construction.

[0051] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

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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