Small water diversion forebay capable of flushing and discharging sand
By designing a small forebay, adopting a smooth curved channel and an automatic sand removal device, the problems of sedimentation and unstable water flow in rural water diversion facilities were solved, achieving automated sand removal and stable water flow, thus improving water diversion efficiency and safety.
Patent Information
- Application Number
- CN202520032453.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-07
AI Technical Summary
Existing rural water diversion facilities suffer from severe sediment deposition during the water diversion process, leading to channel wear and silt accumulation. They are also prone to blockage under extreme weather conditions, requiring frequent manual cleaning. Furthermore, the water flow is unstable, affecting the efficiency of water diversion.
Design a small water intake forebay, which includes a water intake section, a sand flushing section, and a water intake section. It adopts a smooth curved channel layout and is equipped with a trash rack, an overflow weir, a semi-circular sand collection trough, a sedimentation tank, and an automatic flap gate. It uses the kinetic energy of water flow to remove silt and sand, and is combined with a pedestrian walkway for easy management.
It has achieved automated silt removal, reduced manual cleaning work, maintained stable water flow, avoided channel siltation and blockage, and improved water diversion efficiency and safety.
Smart Images
Figure CN223688884U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of agricultural water conservancy engineering, in particular to a small water diversion forebay capable of flushing and discharging sand. BACKGROUND
[0002] At present, the rural water diversion facility construction is relatively backward, and most of them are only simple ditches and channels dug from the side of a stream to divert the stream water to a sedimentation tank, and then the water is transported to the home through the pipeline, and the construction of the water diversion inlet has not considered the problems of sand flushing and discharging and smooth water flow.
[0003] The mountainous stream water contains a large amount of silt, which often causes excessive silt deposition in the water diversion channel, serious wear of the channel bottom and serious silt deposition in the sedimentation tank. At the same time, there are more and more extreme weather, such as extreme rainstorm and mountain flood, which often cause sand blockage at the water diversion inlet, and manual cleaning is required, which is time-consuming and labor-intensive. The extreme drought requires the water diversion inlet to be as low as possible, but the low-elevation water diversion inlet will introduce more silt, and the water flow through the low-elevation water diversion inlet is too large during the rainstorm, so it is necessary to release part of the water flow at the water diversion inlet.
[0004] Moreover, the water diversion inlet is near the mountain, and the surrounding terrain is large, when the water flow enters the water diversion inlet at a large angle or irregular speed, vortex and turbulent flow phenomena are easily formed, thereby causing erosion to the facilities at the water diversion inlet.
[0005] Therefore, there is an urgent need for a small water diversion forebay capable of flushing and discharging sand to solve the above problems. SUMMARY
[0006] The utility model aims at overcoming the above-mentioned defects, and provides a small water diversion forebay capable of flushing and discharging sand to solve the problems in the background art.
[0007] The utility model discloses a technical scheme adopted to solve the above technical problems: a small water diversion forebay capable of flushing and discharging sand, comprising a water intake section, a trash rack is arranged at the front end of the water intake section, the rear end of the water intake section is connected with the front end of a sand flushing section, the rear end of the sand flushing section is connected with the front end of a water diversion section, the water intake section, the sand flushing section and the water diversion section are all at the same elevation at the top, the cross section is a rectangular water channel, and the channel is uniformly arranged in a smooth curve shape.
[0008] Preferably, a first sidewalk and an overflow weir are arranged at the side of the water intake section, and the top elevation of the overflow weir is lower than the side wall of the water channel.
[0009] Preferably, a semicircular inclined sand collecting groove is arranged in the middle of the sand flushing section, a second sidewalk is arranged on the right bank along the water flow direction, the sand collecting groove is inclined downward to a sand settling tank, and the bottom elevation of the sand settling tank is consistent with the lower end of the waterfall.
[0010] Preferably, the water channel between the sand collecting groove and the water weir has a slope of 10°.
[0011] Preferably, the sand sink is a cubic box structure, and an automatic opening and closing flap is arranged at the end of the sand sink.
[0012] Preferably, the sand collecting groove is a semicircular inclined structure with a slope of 25°.
[0013] Preferably, a water overflow weir is arranged at the front end of the water diversion section, the front end is connected to the sand flushing section, a third sidewalk is arranged along the left bank of the water flow direction and the top end of the water overflow weir, and the third sidewalk is connected to a step.
[0014] Preferably, the third sidewalk has the same width as the first sidewalk and the second sidewalk.
[0015] Preferably, the top of the water overflow weir is 0.5 m lower than the cross section of the water overflow channel, and the width is not less than 1.0 m.
[0016] The utility model has the following beneficial effects:
[0017] 1. The rural natural water inlet place sand flushing device is arranged at the water inlet place beside the natural river channel, the trash screen arranged at the water inlet section can block all large floating objects; the overflow weir arranged at the water inlet section can discharge excess water when the flood comes, thereby ensuring the sand removal efficiency of the sand flushing device.
[0018] 2. The utility model collects a large amount of sediment in the sand sink and the sand collecting groove, and uses the kinetic energy generated by water under the height difference to flush away the sediment, so that the flushed sediment enters the natural river channel with the water flow and does not accumulate.
[0019] 3. The flap door of the sand sink can be automatically opened and closed, without human intervention.
[0020] 4. The water overflow weir arranged in the water diversion section can improve the flow pattern of the water flow and make the water flow smoothly into the water inlet, and can also realize secondary sand removal by using its own height.
[0021] 5. The utility model sets up sidewalks at the water inlet section, the sand flushing section and the water diversion section, which are mainly used for management personnel to pass through and observe the running status of the sand flushing device, so that timely treatment can be achieved. DRAWINGS
[0022] Figure 1 It is a three-dimensional schematic view of the utility model device (right bank view);
[0023] Figure 2 It is a local enlarged schematic view of the water inlet section of the utility model device (left bank view);
[0024] Figure 3 It is a three-dimensional schematic view of the overflow weir;
[0025] Figure 4 is a three-dimensional schematic view of the sand collecting groove;
[0026] Figure 5 is a three-dimensional schematic view of the water passing weir;
[0027] In the figure: water taking section 1, trash rack 11, sidewalk 12, overflow weir 13, sand flushing section 3, sidewalk 31, sand collecting groove 32, sand sink 33, flap gate 34, water diversion section 5, water passing weir 51, sidewalk 52, step 53. DETAILED DESCRIPTION
[0028] The utility model will be further described below in combination with the drawings and embodiments:
[0029] As shown in Figure 1 and Figure 2 , the utility model provides a small water diversion forebay that can flush and discharge sand, including water taking section 1, sand flushing section 3 and water diversion section 5, three are connected through the rectangular water passing channel with the cross section size of 1.0m*1.0m, and adopt smooth curve type arrangement, the left bank of water taking section 1 and sand flushing section 3 is rock mass, and the right bank is flat, the left side of water passing channel is embedded in rock mass, and the left bank and the right bank of water diversion section 5 are flat.
[0030] As shown in Figure 1 , Figure 2 and Figure 3 , water taking section 1 front end has the trash rack 11 made of stainless steel arranged beside natural river channel, and the gap around trash rack 11 is treated for water stop; overflow weir 13 is arranged on the right bank of water taking section 1, so that excess water is discharged when flood comes, and sand removal efficiency is guaranteed, the top elevation of the overflow weir 13 is 0.2m lower than the water passing channel, and the width along the water flow direction is 1.0m, and the length perpendicular to the water flow direction is 0.6m; water taking section 1 is connected with trash rack 11 and sand flushing section 3.
[0031] As shown in Figure 1 and Figure 4 , semicircular inclined sand collecting groove 32 is arranged in the middle of sand flushing section 3, sand collecting groove 32 is connected with sand sink 33, and automatic opening and closing flap gate 34 is arranged at the outlet of sand sink 33; the radius of sand collecting groove 32 is 0.2m, the slope is 25%, the elevation difference from the bottom to the top is 3.0m, the size of sand sink 33 is long*wide*high=0.4m*0.5m*0.18m, and the size of flap gate 34 is long*high=0.4m*0.18m, and the thickness is 0.1m.
[0032] In the device running process, the silt in the water will be collected together through the sand collecting groove 32 and the sand sink 33, when the weight of the collected sand and water reaches 2.7kN (equivalent to the sand sink 33 is full of sand), the flap door 34 is automatically opened, the sand is flushed down with the water flow, and reflows into the natural river downstream, which realizes the automatic flushing function and does not cause the silt accumulation, after the silt is discharged, the flap door 34 can be automatically closed by using the self weight (the self weight is 2.2kN> the static water pressure of water 2.05kN), during which no manual operation is required, which is convenient and saves labor, the flushing sand section 3 is connected with the water taking section 1 and the water diversion section 5.
[0033] As shown in Figure 1 and Figure 5 , the water weir 51 is arranged in front of the water diversion section 5, the top elevation of the water weir 51 is 0.5m lower than the water passing channel, the width is 1.0m, which can stabilize the flow pattern of the water diversion section, and can realize secondary sand setting by using the height advantage of the water weir 51, the water passing channel between the sand collecting groove 32 and the water weir 51 has a 10% slope, so the deposited sand will be collected together along the sand collecting groove 32, which also does not require human handling, the water diversion section 5 is connected with the flushing sand section 3 and the rural water intake.
[0034] The walkways 12, 31 and 52 with a width of 0.5m are arranged on the right bank of the water taking section 1 and the flushing sand section 3, and on the top of the water weir 51 and the left bank of the water diversion section 5, and the steps 53 are arranged behind the walkway 52, so that the management personnel can walk conveniently, and check the working state of the flushing sand device, and also can reach the sand sink 33 and the flap door 34 along the sand collecting groove 32, if the flap door 34 has a condition, it can be solved in time.
[0035] The above embodiment is only a preferred technical solution of the present application, and should not be regarded as a limitation of the present application, the protection scope of the present application should be the technical solution recorded in the claims, including the equivalent replacement scheme of the technical features recorded in the claims. That is, the equivalent replacement improvement in this range is also within the protection scope of the present application.
Claims
1. A small-sized water diversion forebay capable of flushing out sand, comprising a water intake section (1), characterized in that, The front end of the water intake section (1) is provided with a trash rack (11), the rear end of the water intake section (1) is connected with the front end of the sand flushing section (3), the rear end of the sand flushing section (3) is connected with the front end of the water diversion section (5), the top of the water intake section (1), the sand flushing section (3) and the water diversion section (5) are at the same elevation, the cross section is a rectangular water channel, and the channels are uniformly arranged in a smooth curve shape.
2. A small-sized forebay for water diversion capable of flushing out sand according to claim 1, characterized in that, The side of the water intake section (1) is provided with a first sidewalk (12) and an overflow weir (13), and the top of the overflow weir (13) is lower than the side wall of the water channel.
3. A small-sized forebay for water diversion capable of flushing out sand, according to claim 1, characterized in that, The sand flushing section (3) is provided with a semicircular inclined sand collecting groove (32) in the middle, the second sidewalk (31) is arranged on the right bank along the water flow direction, the sand collecting groove (32) is inclined downward to the sand setting tank (33), and the bottom of the sand setting tank (33) is at the same height as the lower end of the waterfall.
4. A small-sized forebay for water diversion capable of flushing out sand according to claim 3, characterized in that, The sand setting tank (33) is a cubic box structure, and the end of the sand setting tank (33) is provided with a flap valve (34) capable of being automatically opened and closed.
5. A small-sized forebay for water diversion capable of flushing out sand, according to claim 3, characterized in that, The sand collecting groove (32) is a semicircular inclined structure, and the slope is 25°.
6. A small-sized forebay for water diversion capable of flushing out sand, according to claim 3, characterized in that, The front end of the water diversion section (5) is provided with a water weir (51), the front end is connected with the sand flushing section (3), the third sidewalk (52) is arranged on the left bank along the water flow direction and the top of the water weir (51), and the third sidewalk (52) is connected with the steps (53).
7. A small-sized forebay for water diversion capable of flushing out sand according to claim 6, characterized in that, The water channel between the sand collecting groove (32) and the water weir (51) has a slope of 10°.
8. A small-sized forebay for water diversion capable of flushing out sand according to claim 6, characterized in that, The third sidewalk (52) has the same width as the first sidewalk (12) and the second sidewalk (31).
9. A small-sized forebay for water diversion capable of flushing out sand according to claim 6, characterized in that, The top of the water weir (51) is 0.5m lower than the cross section of the water channel, and the width is not less than 1.0m.