Overflow dam structure for water conservancy and hydropower engineering

Abstract

The utility model discloses an overflow dam structure for water conservancy and hydropower engineering, which relates to the technical field of overflow dams and comprises a riverbed main body, two groups of concrete foundation walls are arranged in the riverbed main body, the tops of the two groups of concrete foundation walls are fixedly connected with an overflow dam, and reinforcing walls are arranged at two ends of the overflow dam. A flood discharge mechanism is arranged in the overflow dam, and a water lockage mechanism is arranged on one side of the top end of the overflow dam. The flood discharge mechanism comprises a first overflow channel formed in the upper end of the overflow dam, a second overflow channel is formed in the middle section of the overflow dam, and a third overflow channel is formed in the lower end of the overflow dam. Water flows into the first overflow channel, the second overflow channel and the third overflow channel to drive the rotating volute blades to rotate, so that the rotating shaft is driven to rotate synchronously, and at the moment, the mounting seat fixed to the other end of the rotating shaft and the scraping strip start to rotate to scrape the surface of the filter screen, so that silt is prevented from blocking the filter screen, and the flood discharge efficiency is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of overflow dams, in particular to an overflow dam structure for a water conservancy and hydropower project. Background Art

[0002] At present, the projects built to control and allocate surface water and groundwater in nature to achieve the purpose of eliminating harm and promoting benefits are also called water projects. Water is an indispensable and precious resource for human production and life, but its natural state does not fully meet human needs. Only by building water conservancy projects can we control water flow, prevent flood disasters, and regulate and distribute water to meet the needs of people's life and production for water resources. Common overflow dams are generally built of concrete or mortar masonry. According to the dam type, there are overflow gravity dams, overflow arch dams, overflow pier dams and overflow earth-rock dams. The latter is limited to low dams with reliable protection facilities on the overflow surface and dam foot and relatively small single-width flow, which can meet the needs of people's daily life. The demand for such water conservancy projects is growing. The overflow dam is a dam that can discharge floodwaters from the dam top. The overflow dam is generally built of concrete or mortar masonry and can be used in mountainous canyon areas. It is a way to solve the problem of insufficient layout of spillways and power station buildings when discharging large flows.

[0003] An existing patent (publication number: CN108867570A) discloses a dam body structure for overflow and anti-clogging of a water conservancy project facility. The dam body structure has a gate, a large water storage height, and is easy to maintain. The dam body is provided with a paddle wheel hydroelectric generator rotor, which can fully utilize water resources for power generation, is clean and environmentally friendly, and can also smooth the water flow. The dam body is provided with three overflow channels, has a strong flood discharge capacity, has a sand discharge channel and a spiral conveyor belt, has a strong sand discharge capacity, has a reverse osmosis filter plate and a concrete foundation wall, has a stable dam bottom, is not prone to soil erosion, and has paddle wheel hydroelectric generator rotor blades that can be automatically retracted, which is safe and conducive to flood discharge.

[0004] However, the above technical solution still has certain defects. Filters are installed at the water inlets of the three overflow channels of the above dam body to prevent a large amount of sediment from entering the downstream. However, during the flood discharge process, some sediment will adhere to the filter, causing the filter to be blocked, resulting in a decrease in the flood discharge rate, or the filter may be damaged by excessive pressure due to the blockage. Therefore, an overflow dam structure for a water conservancy and hydropower project is proposed. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide an overflow dam structure for a water conservancy and hydropower project to solve the technical problems raised in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an overflow dam structure of a water conservancy and hydropower project, comprising a riverbed body, two groups of concrete foundation walls are arranged inside the riverbed body, overflow dams are fixedly connected to the tops of the two groups of concrete foundation walls, reinforcement walls are arranged at both ends of the overflow dam, a flood discharge mechanism is arranged inside the overflow dam, and a water gate mechanism is arranged on one side of the top of the overflow dam;

[0007] The flood discharge mechanism includes a first overflow channel opened at the upper end of the overflow dam, a second overflow channel opened at the middle section of the overflow dam, and a third overflow channel opened at the lower end of the overflow dam. The first overflow channel and the second overflow channel are both composed of a horizontal straight line segment on the left and an oblique line segment on the right. The third overflow channel is a horizontal straight line segment. The first overflow channel, the second overflow channel, and the third overflow channel are all equipped with a shut-off valve. The water inlet ends of the first overflow channel, the second overflow channel, and the third overflow channel are all equipped with a filter assembly. The filter assembly includes a filter assembly fixedly installed on the first overflow channel, a filter assembly fixedly installed on the first overflow channel, and a filter assembly fixedly installed on the second overflow channel. A fixed frame at the water inlet end of the overflow channel, the second overflow channel and the third overflow channel, a filter screen is fixedly installed in the fixed frame, and a fixed bracket is fixedly connected to the inner walls of the four sides of the fixed frame. A rotating shaft is penetrated by one side of the fixed bracket, and the rotating shaft and the fixed bracket are connected by a bearing. A rotating volute is sleeved on the end of the rotating shaft away from the fixed frame, and the other end of the rotating shaft penetrates the filter screen and extends to the outside of the fixed frame, and a mounting seat is fixedly connected to the end of the rotating shaft close to the filter screen, and a scraper strip is fixedly installed on the mounting seat close to the filter screen, and the scraper strip fits the surface of the filter screen.

[0008] As an optimal technical solution for the overflow dam structure of a water conservancy and hydropower project of the utility model, the overflow dam is overall set to a trapezoidal shape, and a lower reverse arc curve section is opened at the bottom end of one side of the overflow dam.

[0009] As an optimal technical solution for the overflow dam structure of a water conservancy and hydropower project of the utility model, a generator room is provided at the bottom end of one side of the overflow dam, and a paddle wheel hydraulic generator rotor is provided above the generator room, and blades are installed on the outer wall of the paddle wheel hydraulic generator rotor.

[0010] As an optimal technical solution for the overflow dam structure of a water conservancy and hydropower project of the utility model, a reinforcement block is fixedly installed between the two groups of concrete foundation walls.

[0011] As an optimal technical solution for the overflow dam structure of a water conservancy and hydropower project of the utility model, the water gate mechanism includes a notch opened at one end of the overflow dam, and a fixed plate is fixedly installed above the notch on one side of the reinforced wall, and two groups of suspension devices are installed on the upper surface of the fixed plate, one end of the two groups of suspension devices is fixedly connected to a traction steel cable, and the other end of the traction steel cable extends through and extends to the bottom of the fixed plate and is fixedly connected to a sluice gate.

[0012] As an optimal technical solution for the overflow dam structure of a water conservancy and hydropower project of the utility model, slide grooves are provided on both sides of the gap opened at one end of the overflow dam, and both sides of the water gate are matched with the slide grooves and slidably connected.

[0013] As an optimal technical solution for the overflow dam structure of a water conservancy and hydropower project of the utility model, a reinforcing plate is fixedly installed between the fixed plate and the reinforced wall, a support column is fixedly installed at the bottom of one end of the fixed plate away from the reinforced wall, and the bottom of the support column is fixedly connected to the top of the overflow dam.

[0014] In summary, the utility model mainly has the following beneficial effects:

[0015] The utility model allows water to enter the first overflow channel, the second overflow channel and the third overflow channel, driving the rotating volute blades to rotate, thereby driving the rotating shaft to rotate synchronously. At this time, the mounting seat and the scraper bar fixed to the other end of the rotating shaft begin to rotate, scraping the surface of the filter screen to prevent mud and sand from clogging the filter screen and affecting the flood discharge efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side sectional view of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 3 For the utility model Figure 2 A in the enlarged view;

[0019] Figure 4 For the utility model Figure 2 The enlarged view of point B in the figure;

[0020] Figure 5 This is a schematic diagram of the structure of the filter assembly of the utility model.

[0021] In the figure: 100, the main body of the riverbed; 200, the flood discharge mechanism; 300, the water gate mechanism;

[0022] 110, concrete foundation wall; 120, reinforcement block; 130, overflow dam; 140, reinforced wall; 150, lower reverse arc curve section; 160, paddle wheel hydroelectric generator rotor; 170, blade;

[0023] 210, first overflow channel; 220, second overflow channel; 230, third overflow channel; 240, cut-off valve; 250, filter assembly; 251, fixed frame; 252, filter screen; 253, fixed bracket; 254, rotating shaft; 255, rotating volute; 256, mounting seat; 257, scraper;

[0024] 310. Fixed plate; 311. Reinforcement plate; 312. Support column; 320. Suspension device; 330. Traction cable; 340. Water gate; 350. Slideway. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0026] The following describes an embodiment of the utility model based on its overall structure.

[0027] An overflow dam structure of a water conservancy and hydropower project, such as Figure 1-5 As shown, it includes a riverbed body 100, two groups of concrete foundation walls 110 are arranged inside the riverbed body 100, overflow dams 130 are fixedly connected to the tops of the two groups of concrete foundation walls 110, reinforcement walls 140 are arranged at both ends of the overflow dams 130, a flood discharge mechanism 200 is arranged inside the overflow dam 130, and a water gate mechanism 300 is arranged on one side of the top of the overflow dam 130; the flood discharge mechanism 200 includes a first overflow channel 210 opened at the upper end of the overflow dam 130, a second overflow channel 220 is opened in the middle section of the overflow dam 130, and the overflow dam 130 is provided with a second overflow channel 220. A third overflow channel 230 is provided at the lower end of the first overflow channel 210, and the second overflow channel 220 is composed of a horizontal straight line segment on the left and an oblique line segment on the right. The third overflow channel 230 is a horizontal straight line segment. A shut-off valve 240 is installed inside the first overflow channel 210, the second overflow channel 220, and the third overflow channel 230. A filter assembly 250 is provided at the water inlet end of the first overflow channel 210, the second overflow channel 220, and the third overflow channel 230. The filter assembly 250 includes a filter assembly 250 fixedly installed on the first overflow channel 2 10. The second overflow channel 220 and the third overflow channel 230 are fixedly provided with a frame 251 at the water inlet end. A filter screen 252 is fixedly installed in the fixed frame 251. The four inner walls of the fixed frame 251 are fixedly connected with a fixed bracket 253. A rotating shaft 254 is penetrated on one side of the fixed bracket 253. The rotating shaft 254 is connected to the fixed bracket 253 through a bearing. A rotating volute 255 is sleeved on one end of the rotating shaft 254 away from the fixed frame 251. The other end of the rotating shaft 254 penetrates the filter screen 252 and extends to the outside of the fixed frame 251. The shaft 254 is fixedly connected to one end near the filter 252 with a mounting seat 256, and a scraper bar 257 is fixedly installed on the side of the mounting seat 256 near the filter 252. The scraper bar 257 fits the surface of the filter 252. The overflow dam 130 is set as a trapezoidal shape as a whole, and a lower reverse arc curve section 150 is opened at the bottom end of one side of the overflow dam 130. A generator room is provided at the bottom end of one side of the overflow dam 130, and a paddle wheel hydraulic generator rotor 160 is provided on the generator room, and blades 170 are installed on the outer wall of the paddle wheel hydraulic generator rotor 160.

[0028] When the water level is normal, the third overflow channel 230 is closed, the shut-off valves 240 inside the first overflow channel 210 and the second overflow channel 220 are opened, water flows through, the rotor 160 of the paddle wheel hydroelectric generator rotates, and the generator room generates electricity. Hydroelectric power generation is a prior art and will not be elaborated on here. When the water level gauge detects a high water level in the river and the flow meter detects that the flow rate of the river is too large, the terminal control room controls the shut-off valve 240 in the third overflow channel 230 to open, thereby improving the flood discharge efficiency. The third overflow channel 240 can also become a fish migration channel. As the flood discharge process proceeds, water flows into the first overflow channel 210, the second overflow channel 220 and the third overflow channel 230, driving the rotating volute 255 to rotate, thereby driving the rotating shaft 254 to rotate synchronously. At this time, the mounting seat 256 and the scraper 257 fixed to the other end of the rotating shaft 254 begin to rotate to scrape the surface of the filter screen 252 to prevent silt from clogging the filter screen 252 and affecting the flood discharge efficiency.

[0029] Please refer to Figure 1 As shown, a reinforcement block 120 is fixedly installed between two sets of concrete foundation walls 110 .

[0030] By providing the reinforcement block 120 , the impact resistance of the concrete foundation wall 110 and the overflow dam 130 as a whole is further enhanced.

[0031] Please refer to Figure 2 and Figure 3 As shown, the water gate mechanism 300 includes a notch opened at one end of the overflow dam 130, and a fixed plate 310 is fixedly installed above the notch on one side of the reinforced wall 140, two sets of suspension devices 320 are installed on the upper surface of the fixed plate 310, one end of the two sets of suspension devices 320 is fixedly connected to a traction cable 330, the other end of the traction cable 330 extends through and extends to the bottom of the fixed plate 310 and is fixedly connected to a water gate 340, and slide grooves 350 are opened on both sides of the notch opened at one end of the overflow dam 130, and both sides of the water gate 340 match the slide grooves 350 and are slidably connected, a reinforcement plate 311 is fixedly installed between the fixed plate 310 and the reinforced wall, a support column 312 is fixedly installed at the bottom of the fixed plate 310 away from the reinforced wall, and the bottom of the support column 312 is fixedly connected to the top of the overflow dam 130.

[0032] The water gate mechanism 300 is used to reduce the impact force of river water on the overflow dam 130. Under normal water discharge state, the flood discharge mechanism 200 is used to discharge flood water. When the river water flow is too large, the suspension device 320 is started to lift the water gate 340 upward to further discharge the river water, which also reduces the impact force of the river water on the overflow dam 130 and extends the service life of the overflow dam 130.

[0033] When in use, at normal water level, the third overflow channel 230 is closed, the shut-off valve 240 inside the first overflow channel 210 and the second overflow channel 220 is opened, water flows through, the rotor 160 of the paddle wheel hydroelectric generator rotates, and the generator room generates electricity. Hydroelectric power generation is a prior art and will not be described in detail here. When the water level meter detects a high water level in the river and the flow meter detects that the flow rate of the river is too large, the terminal control room controls the shut-off valve 240 in the third overflow channel 230 to open, thereby improving the flood discharge efficiency. The third overflow channel 240 can also become a fish trap. In the migratory channel, as the flood discharge process proceeds, water flows into the first overflow channel 210, the second overflow channel 220 and the third overflow channel 230, driving the rotating volute 255 to rotate, thereby driving the rotating shaft 254 to rotate synchronously. At this time, the mounting seat 256 and the scraper bar 257 fixed to the other end of the rotating shaft 254 begin to rotate, and the surface of the filter screen 252 is scraped to prevent the silt from clogging the filter screen 252 and affecting the flood discharge efficiency. The parts not involved in the device are the same as the prior art or can be implemented by the prior art.

[0034] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. An overflow dam structure for a water conservancy and hydropower project, comprising a riverbed body (100), characterized in that: Two groups of concrete foundation walls (110) are provided inside the riverbed body (100), overflow dams (130) are fixedly connected to the tops of the two groups of concrete foundation walls (110), reinforcement walls (140) are provided at both ends of the overflow dam (130), a flood discharge mechanism (200) is provided inside the overflow dam (130), and a water gate mechanism (300) is provided on one side of the top of the overflow dam (130); The flood discharge mechanism (200) comprises a first overflow channel (210) opened at the upper end of the overflow dam (130), a second overflow channel (220) opened at the middle section of the overflow dam (130), and a third overflow channel (230) opened at the lower end of the overflow dam (130). The first overflow channel (210) and the second overflow channel (220) are both composed of a horizontal straight line segment on the left and an oblique line segment on the right. The third overflow channel (230) is a horizontal straight line segment. The first overflow channel (210), the second overflow channel (220), and the third overflow channel (230) are all internally installed with a shut-off valve (240). The first overflow channel (210), the second overflow channel (220), and the third overflow channel (230) are all provided with a filter assembly (250) at the water inlet end. The filter assembly (250) comprises a filter assembly fixedly installed on the first overflow channel (210), the second overflow channel (220), and the third overflow channel (230). 0) and a fixed frame (251) at the water inlet end of the third overflow channel (230), a filter screen (252) being fixedly installed in the fixed frame (251), a fixed bracket (253) being fixedly connected to the inner walls of the four sides of the fixed frame (251), a rotating shaft (254) being passed through one side of the fixed bracket (253), the rotating shaft (254) being connected to the fixed bracket (253) via a bearing, and the rotating shaft (254) being away from the fixed frame ( A rotating volute (255) is sleeved on one end of the rotating shaft (254), the other end of the rotating shaft (254) penetrates the filter screen (252) and extends to the outside of the fixed frame (251), and a mounting seat (256) is fixedly connected to one end of the rotating shaft (254) close to the filter screen (252), and a scraper (257) is fixedly installed on one side of the mounting seat (256) close to the filter screen (252), and the scraper (257) is in contact with the surface of the filter screen (252).

2. The overflow dam structure of a water conservancy and hydropower project according to claim 1, characterized in that: The overflow dam (130) is designed as a trapezoid as a whole, and a lower reverse arc curve section (150) is provided at the bottom end of one side of the overflow dam (130).

3. The overflow dam structure of a water conservancy and hydropower project according to claim 2, characterized in that: A generator room is provided at the bottom end of one side of the overflow dam (130), and a paddle wheel hydraulic generator rotor (160) is provided above the generator room. Blades (170) are installed on the outer wall of the paddle wheel hydraulic generator rotor (160).

4. The overflow dam structure of a water conservancy and hydropower project according to claim 1, characterized in that: A reinforcement block (120) is fixedly installed between the two groups of concrete foundation walls (110).

5. The overflow dam structure of a water conservancy and hydropower project according to claim 1, characterized in that: The water gate mechanism (300) comprises a notch opened at one end of the overflow dam (130), and a fixing plate (310) is fixedly installed above the notch and located on one side of the reinforced wall (140), and two groups of suspension devices (320) are installed on the upper surface of the fixing plate (310), and one end of the two groups of suspension devices (320) is fixedly connected to a traction steel cable (330), and the other end of the traction steel cable (330) extends through and extends to the bottom of the fixing plate (310) and is fixedly connected to a water gate (340).

6. The overflow dam structure of a water conservancy and hydropower project according to claim 5, characterized in that: Slide grooves (350) are provided on both sides of the notch at one end of the overflow dam (130), and both sides of the water gate (340) are matched with the slide grooves (350) and are slidably connected.

7. The overflow dam structure of a water conservancy and hydropower project according to claim 5, characterized in that: A reinforcing plate (311) is fixedly installed between the fixing plate (310) and the reinforced wall, a supporting column (312) is fixedly installed at the bottom of one end of the fixing plate (310) away from the reinforced wall, and the bottom of the supporting column (312) is fixedly connected to the top of the overflow dam (130).

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