Pump station forebay desilting system

Abstract

The invention discloses a pump station forebay desilting system which comprises a water inlet channel, a flow dividing wall, a left desilting basin and a right desilting basin, the left desilting basin and the right desilting basin are symmetrically distributed, the water inlet channel is communicated with the left desilting basin and the right desilting basin, the front end of the flow dividing wall is distributed in the middle of the inner side of the water inlet channel, and the rear side of the flow dividing wall is connected with an integrally-formed arc-shaped water retaining wall. A filter screen is arranged on the left desilting basin, the filter screen is mounted above the arc-shaped retention wall, the filter screen comprises a coarse-hole sand filter screen, a medium-hole sand filter screen and a fine-hole sand filter screen which are sequentially distributed from inside to outside, and the diameters of filter holes of the coarse-hole sand filter screen, the medium-hole sand filter screen and the fine-hole sand filter screen are sequentially reduced; through the arrangement of the arc-shaped water retaining wall and the filter screen, excessive large-particle bed load silt and small-particle suspended silt in sandy river water can be prevented from entering the water purification tank, so that the river water entering the water purification tank is cleaner, and operation and maintenance of irrigation systems such as a water turbine, a water pump and a drip irrigation belt are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of forebay desilting equipment, and in particular to a pump station forebay desilting system. Background Art

[0002] During the operation of water conservancy projects in sandy rivers, silt deposition in sandy rivers causes the water levels in rivers, channels and sedimentation ponds to rise, reducing the water storage capacity of sedimentation ponds. In addition, when the water from sandy rivers is used to irrigate farmland, the silt causes wear, damage and blockage to turbines, water pumps and drip irrigation tapes during the transportation of the water pumps. Therefore, it is necessary to carry out sedimentation treatment on the water in sandy rivers.

[0003] Common pump station forebay sedimentation systems include horizontal flow linear sedimentation tanks, curved sedimentation tanks, cyclone sedimentation tanks, inclined tube sedimentation tanks and circular sedimentation tanks, etc. Their overall structures include water diversion channels, clean water tanks, wing walls and flow regulating plates, etc. Since common sedimentation tanks mainly increase the basin area of ​​the clean water tank, the water flows from the water diversion channel into the clean water tank, and then the wing walls and flow regulating plates restrict the water flow, the water flow velocity is reduced, and the sediment in the water settles.

[0004] The sedimentation method described above has a strong sedimentation effect on large particles of sediment in the sandy river water. However, there are still many fine suspended sediments in the sandy river water. Due to their small particles, slow sedimentation speed and easy suspension, their sedimentation rate in the water body is relatively low, resulting in many suspended sediments entering water pumps, turbines and drip irrigation belts, causing wear and blockage.

[0005] In order to solve the above technical problems, a pump station forebay sedimentation system is urgently needed to be disclosed. Summary of the invention

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: a pump station forebay sedimentation system, comprising an inlet channel, a diversion wall, and symmetrically distributed left and right sedimentation tanks, wherein the inlet channel is connected to the left and right sedimentation tanks, the front end of the diversion wall is distributed in the middle of the inner side of the inlet channel, and the rear side thereof is connected with an integrally formed arc-shaped retaining wall, a filter screen is arranged on the left sedimentation tank, and the filter screen is installed above the arc-shaped retaining wall, and the filter screen comprises a coarse-pore sand filter screen, a medium-pore sand filter screen, and a fine-pore sand filter screen, which are sequentially distributed from the inside to the outside, and the filter hole diameters of the coarse-pore sand filter screen, the medium-pore sand filter screen, and the fine-pore sand filter screen are sequentially reduced;

[0007] The left and right sedimentation tanks are provided with a clean water tank at one end away from the water inlet channel, a left sediment discharge pipe is provided on the outer side of the bottom end of the first sedimentation tank, and a right sediment discharge pipe is provided on the outer side of the bottom end of the right sedimentation tank.

[0008] Furthermore, the arc-shaped water retaining wall comprises a left siltation tank water retaining wall and a right siltation tank water retaining wall, the left siltation tank water retaining wall is arranged in the left siltation tank, and the right siltation tank water retaining wall is arranged in the right siltation tank.

[0009] Furthermore, the outer side of the arc-shaped retaining wall extends to both sides to communicate with the side walls of the water inlet channel, and is connected to a side wall of a siltation tank at one end away from the water inlet channel. The side wall of the siltation tank is arranged on the outer edge of the clean water tank.

[0010] Furthermore, a filter screen connecting steel groove is arranged on the water retaining wall of the left sedimentation tank, three groups of arc-shaped fixing grooves are arranged on the filter screen connecting steel groove, a sealing gasket is arranged at the bottom end of the fixing groove, and the bottom ends of the coarse-pore sand filter net, the medium-pore sand filter net and the fine-pore sand filter net are inserted into the filter screen connecting steel groove.

[0011] The advantages of the invention compared with the prior art are:

[0012] 1. The present invention can prevent excessive large-particle bedload sediment and small-particle suspended sediment in sandy river water from entering the clean water pool through the arrangement of arc-shaped retaining walls and filter screens, making the river water entering the clean water pool cleaner, which is beneficial to the operation and maintenance of irrigation systems such as turbines, water pumps and drip irrigation belts.

[0013] 2. The present invention can eject the sediment in the sedimentation tank from the sand discharge port through the arrangement of the sand discharge pipe, the sand discharge valve and the sand discharge port, thereby achieving the purpose of automatic sand discharge by sedimentation and sand filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a sedimentation system for a pump station forebay of the present invention;

[0015] Figure 2 It is a schematic diagram of the side section of the retaining wall of the sedimentation tank;

[0016] Figure 3 It is a cross-sectional schematic diagram of the connecting steel channel;

[0017] Figure 4 It is a schematic cross-sectional diagram of the side wall notch structure at the connection between the retaining wall and the filter screen;

[0018] Figure 5 This is a cross-sectional diagram of a sand discharge pipe.

[0019] Among them, 1. water inlet channel, 2. diversion wall, 3. left sedimentation tank, 4. right sedimentation tank, 5. left sediment discharge pipe, 6. right sediment discharge pipe, 7. sediment discharge gap, 8. left sedimentation tank retaining wall, 9. right sedimentation tank retaining wall, 10. filter connecting steel trough, 11. clean water tank, 12. sand discharge valve, 13. sand discharge port, 14. left sedimentation tank sediment discharge bottom slope, 15. right sedimentation tank sediment discharge bottom slope, 16. sedimentation tank side wall, 18. filter, 18-1. coarse-pore sand filter net, 18-2. medium-pore sand filter net, 18-3. fine-pore sand filter net, 19-1. left trough one, 19-2. left trough two, 19-3. left trough three, 20-1. right trough one, 20-2. right trough two, 20-3. right trough three. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0021] The present invention is described in detail with reference to the accompanying drawings.

[0022] like Figure 1 As shown, the present invention provides a pump station forebay sedimentation system in a specific implementation, including an inlet channel 1, a diversion wall 2, and symmetrically distributed left sedimentation tank 3 and right sedimentation tank 4, wherein the inlet channel 1 is connected to the left sedimentation tank 3 and the right sedimentation tank 4, the front end of the diversion wall 2 is distributed in the middle of the inner side of the inlet channel 1, and the rear side thereof is connected with an integrally formed arc-shaped retaining wall, a filter screen 18 is arranged on the left sedimentation tank 3, and the filter screen 18 is installed above the arc-shaped retaining wall, and the filter screen 18 includes a coarse-pore sand filter screen 18-1, a medium-pore sand filter screen 18-2, and a fine-pore sand filter screen 18-3, which are sequentially distributed from the inside to the outside, and the filter hole diameters of the coarse-pore sand filter screen 18-1, the medium-pore sand filter screen 18-2, and the fine-pore sand filter screen 18-3 are successively reduced;

[0023] The left and right sedimentation tanks 3 and 4 are provided with a clean water tank 11 at one end away from the water inlet channel 1 , a left sediment discharge pipe 5 is provided on the outer side of the bottom end of the first sedimentation tank 3 , and a right sediment discharge pipe 6 is provided on the outer side of the bottom end of the right sedimentation tank 4 .

[0024] Example:

[0025] The specific sand settling process of the present invention is as follows:

[0026] When water is used for farmland irrigation, the sandy river water flows from the water inlet channel 1 into the left sedimentation tank 3 and the right sedimentation tank 4, and then the diversion wall 2 above the sedimentation tank leads the water flow to the left sedimentation tank retaining wall 8 and the right sedimentation tank retaining wall 9 respectively. After entering the sedimentation tank, the sandy river water flows in a spiral along the arc-shaped retaining wall due to the diversion and water retaining effects of the diversion wall 2 and the arc-shaped retaining wall. A three-layer filter screen 18 with different mesh sizes is arranged above the retaining wall, wherein the filter screen 18 includes a coarse-pore sand filter screen 18-1, a medium-pore sand filter screen 18-2 and a fine-pore sand filter screen 18-3, which are sequentially distributed from the inside to the outside. The filter hole diameters of the coarse-pore sand filter 18-1, the medium-pore sand filter 18-2 and the fine-pore sand filter 18-3 are reduced in sequence; the sandy river water first passes through the spiral water flow to initially separate the large particles of sediment and then settle, while the fine suspended sediment particles are filtered layer by layer by the three layers of sand filter nets above, and then the fine dust is flushed back into the left sedimentation tank 3 and the right sedimentation tank 4 through the sand outlet near the side wall through the tangential water flow, so that the large particles of bedload sediment and small particles of suspended sediment in the river are kept in the left sedimentation tank 3 and the right sedimentation tank 4 as much as possible through the continuous rotation of the spiral water flow. The river water that flows into the clean water tank after being filtered by the coarse-pore sand filter 18-1, the medium-pore sand filter 18-2 and the fine-pore sand filter 18-3 will be significantly cleaner, thereby preventing the water pump from sucking a large amount of sediment into the irrigation system when pumping water, which is beneficial to the operation and maintenance of irrigation systems such as turbines, water pumps and drip irrigation belts.

[0027] When the farmland irrigation is finished, the sand discharge valve 12 is opened, and the silt deposited in the left and right sedimentation tanks 3 and 4 is ejected from the sand discharge port 13 under the dual action of the rotating water flow and gravity to avoid clogging of the sand discharge port, so that all the silt on the bottom plate of the sedimentation tank is discharged, achieving the purpose of automatic sand discharge of sedimentation and sand filtration.

[0028] In order to facilitate the water flow to spiral along the retaining wall, the arc-shaped retaining wall includes a left siltation tank retaining wall 8 and a right siltation tank retaining wall 9. The left siltation tank retaining wall 8 is arranged in the left siltation tank 3, and the right siltation tank retaining wall 9 is arranged in the right siltation tank 4.

[0029] As a further elaboration of the present invention, the outer side of the arc-shaped retaining wall extends to both sides and is connected to the side wall of the water inlet channel 1 , and is connected to a siltation tank side wall 16 at the end away from the water inlet channel 1 , and the siltation tank side wall 16 is arranged on the outer edge of the clean water tank 11 .

[0030] In order to facilitate the installation and fixing of the filter screen, a filter screen connection steel groove 10 is provided on the left sedimentation tank retaining wall 8, and three groups of arc-shaped fixing grooves are provided on the filter screen connection steel groove 10. A sealing gasket is provided at the bottom end of the fixing groove, and the bottom ends of the coarse-pore sand filter screen 18-1, the medium-pore sand filter screen 18-2 and the fine-pore sand filter screen 18-3 are inserted into the filter screen connection steel groove 10. The structural setting of the sealing gasket can make the filter screen and the filter screen connection steel groove 10 more tightly connected, which is beneficial to the blocking effect of the filter screen on sediment.

[0031] In order to facilitate the fixation of the filter screen, a connecting steel trough 22 is provided at the connection between the left sedimentation tank retaining wall 8 and the filter screen 18, and the connecting steel trough 19 includes a left trough 19-1, a left trough 219-2, a left trough 319-3, a right trough 120-1, a right trough 220-2 and a right trough 320-3. The inner cavities of the left trough 19-1, the left trough 219-2, the left trough 319-3, the right trough 120-1, the right trough 220-2 and the right trough 320-3 are cylindrical in shape, and their vertical cross-sections are rectangular. The coarse-pore sand filter screen 18-1, the medium-pore sand filter screen 18-2 and the fine-pore sand filter screen 18-3 are installed and fixed in the connecting steel trough 22 on both sides through net columns 21.

[0032] As a further elaboration of the present invention, the net columns 21 are provided in three groups, and the three groups of net columns 21 are arranged obliquely to reserve sand discharge openings 7. The filtered silt is flushed back into the sedimentation tank through the sand discharge openings near the side wall by the action of the rotating water flow.

[0033] As a further elaboration of the present invention, a left sedimentation tank sand discharge bottom slope 14 is provided at the bottom end of the left sedimentation tank 3, and a right sedimentation tank sand discharge bottom slope 15 is provided in the right sedimentation tank 4. The left sedimentation tank sand discharge bottom slope 14 is high on the outside and low on the inside, and its bottom end is connected to the top of the left sedimentation pipe 5.

[0034] As a further elaboration of the present invention, the left sand discharge pipe 5 and the right sand discharge pipe 6 are both equipped with a sand discharge valve 12, and a sand discharge port 13 is provided on the sand discharge valve 12. After the farmland irrigation is completed, the sand discharge valve is opened, and under the dual effects of the rotating water flow and gravity, the silt at the bottom of the sedimentation tank is ejected completely to avoid clogging of the sand discharge port.

[0035] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A pump station forebay sedimentation system, characterized by: The invention comprises an inlet channel (1), a diversion wall (2), and a symmetrically distributed left sedimentation tank (3) and a right sedimentation tank (4), wherein the inlet channel (1) is connected to the left sedimentation tank (3) and the right sedimentation tank (4), the front end of the diversion wall (2) is distributed in the middle of the inner side of the inlet channel (1), and the rear side thereof is connected to an integrally formed arc-shaped water retaining wall, a filter screen (18) is arranged on the left sedimentation tank (3), and the filter screen (18) is installed above the arc-shaped water retaining wall, and the filter screen (18) comprises a coarse-pore sand filter screen (18-1), a medium-pore sand filter screen (18-2), and a fine-pore sand filter screen (18-3) which are sequentially distributed from the inside to the outside, and the filter hole diameters of the coarse-pore sand filter screen (18-1), the medium-pore sand filter screen (18-2), and the fine-pore sand filter screen (18-3) are successively reduced; The left sedimentation tank (3) and the right sedimentation tank (4) are provided with a clean water tank (11) at one end away from the water inlet channel (1), a left sediment discharge pipe (5) is provided on the outer side of the bottom end of the first sedimentation tank (3), and a right sediment discharge pipe (6) is provided on the outer side of the bottom end of the right sedimentation tank (4).

2. A pump station forebay sedimentation system according to claim 1, characterized in that: The arc-shaped water retaining wall comprises a left siltation tank water retaining wall (8) and a right siltation tank water retaining wall (9); the left siltation tank water retaining wall (8) is arranged in the left siltation tank (3), and the right siltation tank water retaining wall (9) is arranged in the right siltation tank (4).

3. A pump station forebay sedimentation system according to claim 2, characterized in that: The outer side of the arc-shaped water retaining wall extends to both sides and is connected to the side wall of the water inlet channel (1), and is connected to a siltation tank side wall (16) at the end away from the water inlet channel (1). The siltation tank side wall (16) is arranged on the outer edge of the clean water tank (11).

4. A pump station forebay sedimentation system according to claim 1, characterized in that: A filter screen connecting steel groove (10) is arranged on the left sedimentation tank retaining wall (8), three groups of arc-shaped fixing grooves are arranged on the filter screen connecting steel groove (10), a sealing gasket is arranged at the bottom end of the fixing groove, and the bottom ends of the coarse-pore sand filter screen (18-1), the medium-pore sand filter screen (18-2) and the fine-pore sand filter screen (18-3) are inserted into the filter screen connecting steel groove (10).

5. A pump station forebay sedimentation system according to claim 1, characterized in that: The net upright posts (21) are provided in three groups, and the three groups of net upright posts (21) are arranged at an angle to reserve sand discharge openings (7).

6. A pump station forebay sedimentation system according to claim 1, characterized in that: A connecting steel trough (22) is provided at the connection between the left sedimentation tank retaining wall (8) and the filter screen (18); the connecting steel trough (19) comprises a left trough 1 (19-1), a left trough 2 (19-2), a left trough 3 (19-3), a right trough 1 (20-1), a right trough 2 (20-2) and a right trough 3 (20-3); the inner cavities of the left trough 1 (19-1), the left trough 2 (19-2), the left trough 3 (19-3), the right trough 1 (20-1), the right trough 2 (20-2) and the right trough 3 (20-3) are cylindrical in shape, and their vertical cross-sections are rectangular; the two sides of the coarse-pore sand filter screen (18-1), the medium-pore sand filter screen (18-2) and the fine-pore sand filter screen (18-3) are installed and fixed in the connecting steel trough (22) through net columns (21).

7. A pump station forebay sedimentation system according to claim 1, characterized in that: The bottom end of the left sedimentation tank (3) is provided with a left sedimentation tank sand discharge bottom slope (14), and the right sedimentation tank (4) is provided with a right sedimentation tank sand discharge bottom slope (15). The left sedimentation tank sand discharge bottom slope (14) is high outside and low inside, and its bottom end is connected to the top end of the left sediment discharge pipe (5).

8. A pump station forebay sedimentation system according to claim 1, characterized in that: The left sand discharge pipe (5) and the right sand discharge pipe (6) are both installed with a sand discharge valve (12), and the sand discharge valve (12) is provided with a sand discharge port (13).

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