Sand blocking and discharging device for water conservancy project

Abstract

The invention provides a water conservancy project sand blocking and discharging device, and mainly relates to the field of water conservancy project drainage equipment. A water conservancy project sand blocking and discharging device comprises a desilting basin, a water inlet channel, a drainage channel, a flow dividing sand blocking assembly, a sand discharging assembly and a trash blocking grating assembly, the water inlet channel is fixedly installed on one side of the desilting basin, the drainage channel is fixedly installed on the side, close to the water inlet channel, of the front face of the desilting basin, and the flow dividing sand blocking assembly is arranged in the desilting basin; the lower portion of the drainage channel is provided with a desilting assembly communicated with the interior of the desilting basin, and the water inlet channel is internally provided with a trash holding grating assembly. The device disclosed by the invention has the beneficial effects that when the device is used for shunting silt in river water, the river water is introduced into the sedimentation tank through the water inlet channel, so that the river water generates vortex in the sedimentation tank to be beneficial to gathering heavier gravels to the center, and the sediment in the river water is accelerated.

Description

Technical Field

[0001] The invention mainly relates to the technical field of water conservancy engineering drainage equipment, and specifically to a water conservancy engineering sand blocking and drainage device. Background Art

[0002] In water conservancy projects, the silt in the river will flow downstream along the river with the flow of water. At the same time, if the silt is not enough to remain in the water during the flow, it will sink to the bottom of the river. Therefore, after a long period of accumulation, the riverbed rises, which can easily cause the river's flow cross-sectional area to decrease, reducing the river's drainage capacity. Therefore, it is necessary to clean the silt at the bottom regularly.

[0003] The existing Chinese patent application with publication number CN117385803A discloses a river sediment interception and sedimentation device, which includes an interception trough, which is fixed at the bottom of the river channel, and a sand accumulation area is arranged along one end of the river channel. A sedimentation component is arranged above the interception trough, and a horizontal conveying component for conveying sediment to the sand accumulation area is arranged below the sedimentation component. A mud discharge component for discharging sediment is also arranged at the bottom of the interception trough; the sedimentation component includes a plurality of waterweed planting racks, which are arranged horizontally in sequence along the direction of the river channel, and waterweeds are arranged on the waterweed planting racks in the vertical direction. The present application enables sediment to be better settled so as to be discharged from the river in a timely manner.

[0004] However, the river sediment interception and sedimentation device has the following defects when used: The sand intercepting and draining devices in the prior art mainly intercept sediment by aquatic plants when diverting sediment in river water. Since the growth of aquatic plants is less affected by environmental factors, the density of aquatic plants has a greater sediment interception effect, and the sediment interception effect is poor when the aquatic plants are sparse. Although the sediment interception effect can be improved when the aquatic plants are vigorous, it will affect the flow of river water, cause the river channel to be blocked, resulting in a decrease in the flow rate of the river water, and also affect the separation efficiency of sediment. In addition, the lifespan of aquatic plants is limited, and long-term impact by sediment will also lead to the death of aquatic plants. Therefore, the sediment separation effect is difficult to control, affecting the use effect. Summary of the invention

[0005] In order to solve the deficiencies of the prior art, the present invention provides a device for intercepting and draining sand in a water conservancy project, which is implemented by the following technical solutions: A sand intercepting and discharging device for a water conservancy project comprises a sedimentation tank, an inlet channel, a drainage channel, a diversion sand intercepting assembly, a sand discharging assembly, and a trash grille assembly. The inlet channel is fixedly installed on one side of the sedimentation tank, and the drainage channel is fixedly installed on the side of the front of the sedimentation tank close to the inlet channel. The sedimentation tank is provided with a diversion sand intercepting assembly, and the lower part of the drainage channel is provided with a sand discharging assembly communicated with the inside of the sedimentation tank. The inlet channel is provided with a trash grille assembly. Wherein, the diversion and sand blocking components include: A turntable is rotatably installed in the middle of the sedimentation tank, the turntable divides the sedimentation tank into an upper chamber and a lower chamber, and a plurality of diversion slots evenly distributed in a circular array are opened on the top surface of the turntable; Guide plates: a plurality of guide plates arranged obliquely are fixedly mounted on the top surface of the rotating disk, and the guide plates are respectively fixedly mounted on the edges of the diversion slots; A reduction motor, a support plate is fixedly installed at the bottom of the sedimentation tank, and a reduction motor is fixedly installed on one side of the support plate; A transmission shaft, the bottom surface of the turntable is fixedly connected to the upper end of the transmission shaft, the transmission shaft vertically penetrates the bottom surface of the sedimentation tank and is rotatably connected to it through a sealed bearing, and the lower end of the transmission shaft is fixedly connected to the output end of the reduction motor; A shell is fixedly installed at the bottom of the sedimentation tank, and the reduction motor is located in the shell.

[0006] Furthermore, the sand removal component includes: A sand collecting box is fixedly installed at the bottom of the drainage channel, and the rear of the sand collecting box is connected to the sand settling tank; Sand discharge pipes: a plurality of sand discharge pipes are fixedly installed on one side of the sand collecting box; A sand pump is provided, wherein the outer ends of the sand discharge pipes are respectively connected to a sand pump.

[0007] Furthermore, a sand pushing plate is fixedly installed on one side of the transmission shaft, the sand pushing plate is located in the lower chamber, and the bottom surface of the sand pushing plate is slidably matched with the bottom surface of the inner wall of the sedimentation tank, and a steep slope is provided at the bottom of the inner wall of the sedimentation tank opposite to the sand collecting box.

[0008] Furthermore, the trash grill assembly includes: A U-shaped frame, wherein the U-shaped frame is fixedly installed in the water inlet channel with its opening facing upward; First baffle bars, a plurality of evenly distributed first baffle bars are fixedly installed at the bottom of the inner wall of the U-shaped frame; A second shift bar, wherein a horizontally arranged second shift bar is respectively provided between two adjacent first shift bars; A transverse plate, wherein the two sides of the second baffle are respectively provided with a transverse plate, and the inner sides of the transverse plates are respectively fixedly connected to the corresponding ends of the second baffle; A third baffle, wherein a plurality of evenly distributed third baffles are fixedly mounted on the top surface of the horizontal plate near the side of the sedimentation tank; The horizontal plate is driven to move up and down by the lifting assembly.

[0009] Furthermore, the lifting assembly includes: A stepper motor, a mounting frame is fixedly mounted behind the water inlet channel, and a stepper motor is fixedly mounted behind the mounting frame; A rotating shaft, the output end of the stepper motor is fixedly mounted with a rotating shaft, the rotating shaft longitudinally passes through the water inlet channel and is connected to its bearing; Racks, wherein racks are fixedly mounted on both the front and rear sides of the top surface of one of the transverse plates; Gears, gears corresponding to the racks are fixedly mounted on the rotating shaft, and the gears are respectively meshed with the corresponding racks.

[0010] Furthermore, the inner wall of the water inlet channel is provided with slide grooves at opposite ends of the transverse plate, and sliders are fixedly installed at both ends of the transverse plate, and the sliders are respectively located in the corresponding slide grooves and slidably cooperate with them.

[0011] Furthermore, a vertical cylinder with an opening on the top surface is fixedly mounted on the top surface of the rotating disk, and the outer side of the vertical cylinder is fixedly connected to a side opposite to the guide plate.

[0012] Furthermore, a plurality of evenly distributed overflow grooves are provided near the center of the top surface of the turntable, and the upper end of the vertical cylinder is lower than the top surface of the sedimentation tank.

[0013] Furthermore, the diverter trough is a downwardly inclined trough.

[0014] Furthermore, a water retaining plate is fixedly installed on one side of the inner wall of the desilting tank.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. When the device is diverting the sediment in the river water, the river water is introduced into the sedimentation tank through the water inlet channel. The design of the water inlet channel being tangent to the sedimentation tank causes the water flow to flow in a circular manner along the inner wall of the sedimentation tank, causing the river water to generate eddy currents in the sedimentation tank. This makes the water flow speed near the inner wall slower, while the river water speed in the central area is faster, which helps to gather heavier sand and gravel to the center and accelerate the sedimentation of sand in the river water. The diversion trough on the turntable and the inclined guide plate further enhance the rotation effect of the water flow, promote the sinking of sand and gravel and collect them in the lower chamber through the diversion trough along with a part of the river water.

[0016] 2. When the device is diverting the sediment in the river water, the sediment at the bottom of the sedimentation tank is continuously pushed into the sand collecting box through the sand pushing plate. The sand pump connected to the sand discharge pipe can automatically extract the sand and gravel, reducing the need for manual operation and improving the sand discharge efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a front view of the present invention; Figure 3 is a top view of the present invention; Figure 4It is a schematic diagram of the internal structure of the grit chamber of the present invention; Figure 5 is along Figure 2 Schematic diagram of the cross-sectional structure along the AA line; Figure 6 yes Figure 3 A partial enlarged view of Ⅰ.

[0018] Numbers shown in the accompanying drawings: 10, sedimentation tank; 101, upper chamber; 102, lower chamber; 103, water retaining plate; 20, water inlet channel; 30, drainage channel; 40, diversion and sand blocking assembly; 401, turntable; 402, diversion trough; 403, guide plate; 404, reduction motor; 405, support plate; 406, transmission shaft; 407, housing; 408, overflow trough; 50, sand discharge assembly; 501, sand collecting box; 502 , sand discharge pipe; 503, sand pump; 60, trash screen assembly; 601, U-shaped frame; 602, first baffle; 603, second baffle; 604, horizontal plate; 605, third baffle; 70, sand push plate; 701, steep slope; 80, lifting assembly; 801, stepping motor; 802, rotating shaft; 803, rack; 804, gear; 805, slide; 806, slider; 807, mounting frame; 90, vertical cylinder. DETAILED DESCRIPTION

[0019] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the application.

[0020] Embodiment: A sand-blocking and drainage device for water conservancy projects like Figure 1-6 As shown, a sand blocking and draining device for a water conservancy project, the specific structure of which includes: A desilting tank 10, an inlet channel 20, a drainage channel 30, a diversion sand trap assembly 40, a sand discharge assembly 50, and a trash screen assembly 60. The inlet channel 20 is fixedly installed on one side of the desilting tank 10, and the inlet channel 20 is communicated with the desilting tank 10. The desilting tank 10 is a columnar structure. A drainage channel 30 is fixedly installed on the front side of the desilting tank 10 near the inlet channel 20, and the drainage channel 30 is communicated with the desilting tank 10. The inlet channel 20 and the drainage channel 30 are vertically distributed, and the inlet channel 20 and the drainage channel 30 are tangent to the desilting tank 10. A diversion sand trap assembly 40 is provided in the desilting tank 10, and a sand discharge assembly 50 communicated with the inside of the desilting tank 10 is provided at the lower part of the drainage channel 30. A trash screen assembly 60 is provided in the inlet channel 20; Wherein, the diversion and sand blocking component 40 includes: A turntable 401 is rotatably mounted in the middle of the sedimentation tank 10. The turntable 401 is rotatably mounted in the sedimentation tank 10 through a bearing. The turntable 401 divides the sedimentation tank 10 into an upper chamber 101 and a lower chamber 102. The top surface of the turntable 401 is provided with a plurality of diversion slots 402 evenly distributed in a circular array. Guide plates 403: A plurality of guide plates 403 arranged obliquely are fixedly mounted on the top surface of the rotating disk 401, and the guide plates 403 are respectively fixedly mounted on the edges of the diversion slots 402; A reduction motor 404, wherein the reduction motor 404 is electrically connected to a power source, and a support plate 405 is fixedly installed at the bottom of the desilting tank 10, and the reduction motor 404 is fixedly installed on one side of the support plate 405; The transmission shaft 406, the bottom surface of the rotating disk 401 is fixedly connected to the upper end of the transmission shaft 406, the transmission shaft 406 vertically penetrates the bottom surface of the sedimentation tank 10 and is rotatably connected to it through a sealed bearing, and the lower end of the transmission shaft 406 is fixedly connected to the output end of the reduction motor 404; Shell 407 , the bottom of the desilting tank 10 is fixedly mounted with the shell 407 , and the reduction motor 404 is located in the shell 407 .

[0021] The above working principle: when diverting water and removing sand, the river water is introduced into the sedimentation tank 10 through the water inlet channel 20. Since the water inlet channel 20 is tangent to the sedimentation tank 10, the river water can flow in a circular shape along the inner wall of the sedimentation tank 10 after squeezing into the sedimentation tank 10, thereby generating a certain vortex in the sedimentation tank 10. At this time, the river water flow rate near the inner wall of the sedimentation tank 10 is slow, and the river water flow rate near the center of the sedimentation tank 10 is fast, so that the sand and gravel can be continuously drawn into the center of the sedimentation tank 10 by the river water, so that the sand and gravel can be gathered inside the sedimentation tank 10, and because the mass of the sand and gravel is large, the sand and gravel can be gathered on the top surface of the turntable 401, and flow downward through the diversion trough 402 with a part of the river water In the lower chamber 102, a part of the river water located in the upper layer of the sedimentation tank 10 continues to flow and is finally discharged by the drainage channel 30, so as to realize the diversion of gravel and river water; the gravel and part of the river water flowing into the lower chamber 102 are extracted out of the sedimentation tank 10 by the sand discharge assembly 50, and the separated gravel can be directly sprayed on the river bank for reinforcement and protection of the river bank, thereby reducing the soil erosion of the river bank; when the river water passes through the water inlet channel 20, the trash screen assembly 60 can intercept large-volume debris and some floating objects, such as common garbage such as branches and plastic bottles, so as to prevent large-volume debris and some floating objects from entering the sedimentation tank 10, prevent the diversion trough 402 from being blocked, and improve the reliability of the device; When the diversion and sand interception component 40 is diverting river water and sand and gravel, the transmission shaft 406 is driven to rotate through the reduction motor 404, thereby driving the turntable 401 to rotate. During the rotation of the turntable 401, the guide plate 403 inclined at the top thereof can further drive the river water to rotate, which can further promote the sedimentation and aggregation of sand and gravel and improve the diversion efficiency of sand and gravel; at the same time, after the river water enters the sedimentation tank 10 from the water inlet channel 20, it will have a certain impact on the guide plate 403. The driving force generated by the river water on the guide plate 403 can facilitate the rotation of the turntable 401, reduce the load of the reduction motor 404, protect the reduction motor 404, reduce power consumption and achieve cost reduction and efficiency improvement.

[0022] The sand removal assembly 50 includes: A sand collecting box 501 is fixedly installed at the bottom of the drainage channel 30, and the rear part of the sand collecting box 501 is connected to the sand settling tank 10; Sand discharge pipes 502, a plurality of sand discharge pipes 502 are fixedly installed on one side of the sand collecting box 501; The sand pump 503 is electrically connected to a power source, and the outer ends of the sand discharge pipes 502 are respectively connected to the sand pump 503 .

[0023] After the sand and gravel enter the lower shell 102, they will continue to accumulate and flow to the sand collecting box 501. When the sand discharge component 50 is pumping sand, after the sand pump 503 is powered on and works, the sand pump 503 extracts the river water and sand and gravel in the sand collecting box 501 through the sand discharge pipe 502, thereby realizing the discharge of sand and gravel. When installing this device, a pipeline can be set at the outlet of the sand pump 503 to facilitate the collection of sand and gravel. The collected sand and gravel can be directly discharged onto the river dam for reinforcement of the river dam.

[0024] A sand pushing plate 70 is fixedly installed on one side of the transmission shaft 406. The sand pushing plate 70 is tilted and located in the lower chamber 102. The bottom surface of the sand pushing plate 70 slides with the bottom surface of the inner wall of the sand settling tank 10. A steep slope 701 is provided at the bottom of the inner wall of the sand settling tank 10 opposite to the sand collecting box 501.

[0025] When this structural design is in use, the transmission shaft 406 can drive the sand pushing plate 70 to rotate synchronously. During the rotation of the sand pushing plate 70, the sand is continuously pushed to flow along the steep slope 701 to the sand collecting box 501, thereby facilitating the sand removal component 50 to extract the sand.

[0026] The trash grill assembly 60 includes: A U-shaped frame 601, wherein the U-shaped frame 601 is fixedly installed in the water inlet channel 20 with its opening facing upward; First baffle bars 602, a plurality of evenly distributed first baffle bars 602 are fixedly installed at the bottom of the inner wall of the U-shaped frame 601; A second barrier rod 603, wherein a horizontally arranged second barrier rod 603 is respectively provided between two adjacent first barrier rods 602; A transverse plate 604, wherein the transverse plates 604 are respectively provided on both sides of the second baffle rod 603, and the inner sides of the transverse plates 604 are respectively fixedly connected to the corresponding ends of the second baffle rod 603; A third baffle 605, a plurality of evenly distributed third baffles 605 are fixedly mounted on the top surface of the horizontal plate 604 near the side of the sedimentation tank 10; The horizontal plate 604 is driven to move up and down by the lifting assembly 80 .

[0027] When this structural design is in use, large-volume debris in the water inlet channel 20 can be intercepted by the first baffle bar 602 and the third baffle bar 605 to prevent the large-volume debris from entering the sedimentation tank 10; when cleaning, the lifting component 80 is used to drive the second baffle plate 603 and the third baffle plate 605 to move upward, the second baffle plate 603 can lift the debris upward, and the third baffle plate 605 can prevent the debris from being washed into the sedimentation tank 10 during the salvage process, thereby making it convenient for the user to fish out the intercepted debris in the water inlet channel 20 for easy cleaning.

[0028] The lifting assembly 80 includes: A stepper motor 801, wherein the stepper motor 801 is electrically connected to a power source, and a mounting frame 807 is fixedly mounted behind the water inlet channel 20, and the stepper motor 801 is fixedly mounted behind the mounting frame 807; A rotating shaft 802, the output end of the stepping motor 801 is fixedly mounted with the rotating shaft 802, the rotating shaft 802 longitudinally penetrates the water inlet channel 20 and is connected to its bearing; A rack 803, wherein the rack 803 is fixedly mounted on both the front and rear sides of the top surface of one of the horizontal plates 604; Gear 804 : Gears 804 corresponding to the racks 803 are fixedly mounted on the rotating shaft 802 , and the gears 804 are respectively meshed with the corresponding racks 803 .

[0029] When the debris blocked in the water inlet channel 20 is being salvaged, the rotating shaft 802 is driven to rotate by the stepper motor 801, and the rotating shaft 802 drives the gear 804 connected thereto to rotate synchronously. At this time, the rack 803 meshing with the gear 804 can drive the horizontal plate 604 connected thereto to move upward, so that the horizontal plate 604 drives the second baffle 603 and the third baffle 605 to move upward, and the blocked objects are removed from the water inlet channel 20.

[0030] The inner wall of the water inlet channel 20 is provided with slide grooves 805 at the two ends of the horizontal plate 604, and the two ends of the horizontal plate 604 are fixedly installed with sliders 806, which are respectively located in the corresponding slide grooves 805 and slide with them. Through the mutual cooperation between the sliders 806 and the slide grooves 805, the horizontal plate 604 can be limited, and the stability of the horizontal plate 604 when moving can be improved.

[0031] A vertical cylinder 90 with an opening on the top is fixedly mounted on the top surface of the rotating disk 401, and the outer side of the vertical cylinder 90 is fixedly connected to the side opposite to the guide plate 403. An annular channel for river water to flow can be formed between the outer side of the vertical cylinder 90 and the inner wall of the sedimentation tank 10, and the cooperation between the vertical cylinder 90 and the guide plate 403 can further guide the sediment to flow to the diversion trough 402.

[0032] A plurality of evenly distributed overflow grooves 408 are provided near the center of the top surface of the rotating disk 401, and the upper end of the vertical cylinder 90 is lower than the top surface of the sedimentation tank 10. When the water level in the sedimentation tank 10 is too high, river water can enter the vertical cylinder 90 through the top opening of the vertical cylinder 90, and flow into the lower chamber 102 through the overflow grooves 408, thereby accelerating the discharge of river water and achieving the effect of drainage.

[0033] The diversion trough 402 is a downwardly inclined trough. When the river water carries the sediment through the inclined diversion trough 402, it can generate a tangential force on the sediment accumulated at the bottom of the lower chamber 102, thereby increasing the impact effect on the sediment and making it easier for the sediment to be discharged by the sand discharge assembly 50.

[0034] A water baffle 103 is fixedly installed on one side of the inner wall of the sedimentation tank 10. The water baffle 103 can play a drainage effect, so that the river water can be discharged into the drainage channel 30 after circulating in the sedimentation tank 10.

[0035] The present solution also includes a controller, the position of which is set by the staff according to actual conditions during operation. The controller is used to control the electrical devices used in the present solution, including but not limited to sensors, motors, telescopic rods, water pumps, solenoid valves, heating wires, heat pumps, display screens, computer input devices, switch buttons, communication equipment, lights, speakers and microphones; the controller is an Intel processor, an AMD processor, a PLC controller, an ARM processor or a single-chip microcomputer, and the supporting motherboard, memory stick, storage medium and power supply are also included therewith, and the power supply is AC or a lithium battery; when a display screen is provided, a display card is also provided; for the operating principle of the controller, please refer to "Principles of Automatic Control", "Principles of Microcontrollers and Application Simulation Cases" and "Principles and Applications of Sensors" published by Tsinghua University Press, and other books in the field can be used for reference; other automatic controls and electrical devices not mentioned are all knowledge well known to those skilled in the art and will not be repeated here.

[0036] In the explanation of the present invention, it should be noted that the terminology indicating the orientation is only for the convenience of description and understanding, and is not the only limitation on the installation position of the specific technical features, and does not exclude other possible installation methods.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sand interception and drainage device for a water conservancy project, comprising a sedimentation tank (10), an inlet channel (20), a drainage channel (30), a diversion sand interception assembly (40), a sand discharge assembly (50), and a trash screen assembly (60), characterized in that: A water inlet channel (20) is fixedly installed on one side of the desilting tank (10), a drainage channel (30) is fixedly installed on the front side of the desilting tank (10) close to the water inlet channel (20), a flow diversion and sand blocking assembly (40) is provided in the desilting tank (10), a sand discharge assembly (50) which is in communication with the interior of the desilting tank (10) is provided at the lower part of the drainage channel (30), and a trash screen assembly (60) is provided in the water inlet channel (20); Wherein, the flow diversion and sand interception component (40) comprises: A rotating disk (401) is rotatably mounted in the middle of the sedimentation tank (10), the rotating disk (401) divides the sedimentation tank (10) into an upper chamber (101) and a lower chamber (102), and a plurality of diversion slots (402) evenly distributed in a circular array are provided on the top surface of the rotating disk (401); Guide plates (403), a plurality of guide plates (403) arranged in an inclined manner are fixedly mounted on the top surface of the rotating disk (401), and the guide plates (403) are respectively fixedly mounted on the edges of the diversion grooves (402); A reduction motor (404), a support plate (405) is fixedly mounted on the bottom of the sedimentation tank (10), and a reduction motor (404) is fixedly mounted on one side of the support plate (405); A transmission shaft (406), the bottom surface of the rotating disk (401) is fixedly connected to the upper end of the transmission shaft (406), the transmission shaft (406) vertically penetrates the bottom surface of the sedimentation tank (10) and is rotatably connected thereto via a sealed bearing, and the lower end of the transmission shaft (406) is fixedly connected to the output end of the reduction motor (404); A housing (407) is fixedly mounted on the bottom of the sedimentation tank (10), and the reduction motor (404) is located inside the housing (407).

2. A device for intercepting and draining sand in a hydraulic project according to claim 1, characterized in that: The sand removal assembly (50) comprises: A sand collecting box (501), the sand collecting box (501) is fixedly installed at the bottom of the drainage channel (30), and the rear part of the sand collecting box (501) is connected to the sand settling tank (10); Sand discharge pipes (502), a plurality of sand discharge pipes (502) are fixedly installed on one side of the sand collecting box (501); A sand extraction pump (503), wherein the outer ends of the sand removal pipes (502) are respectively connected to the sand extraction pumps (503).

3. A device for intercepting and draining sand in a hydraulic project according to claim 2, characterized in that: A sand pushing plate (70) is fixedly mounted on one side of the transmission shaft (406). The sand pushing plate (70) is located in the lower chamber (102). The bottom surface of the sand pushing plate (70) is slidably matched with the bottom surface of the inner wall of the sand settling tank (10). A steep slope (701) is provided at the bottom of the inner wall of the sand settling tank (10) opposite to the sand collecting box (501).

4. A device for intercepting and draining sand in a hydraulic project according to claim 1, characterized in that: The trash screen assembly (60) comprises: A U-shaped frame (601), the U-shaped frame (601) being fixedly installed in the water inlet channel (20) with its opening facing upward; First baffle bars (602), a plurality of evenly distributed first baffle bars (602) are fixedly mounted on the bottom of the inner wall of the U-shaped frame (601); A second barrier rod (603), wherein a horizontally arranged second barrier rod (603) is respectively provided between two adjacent first barrier rods (602); A transverse plate (604), wherein the transverse plates (604) are respectively provided on both sides of the second baffle rod (603), and the inner sides of the transverse plates (604) are respectively fixedly connected to corresponding ends of the second baffle rod (603); A third baffle (605), wherein a plurality of evenly distributed third baffles (605) are fixedly mounted on the top surface of the horizontal plate (604) on the side close to the sedimentation tank (10); The horizontal plate (604) is driven to move up and down by the lifting assembly (80).

5. A device for intercepting and draining sand in a hydraulic project according to claim 4, characterized in that: The lifting assembly (80) comprises: A stepper motor (801), a mounting frame (807) is fixedly mounted behind the water inlet channel (20), and a stepper motor (801) is fixedly mounted behind the mounting frame (807); A rotating shaft (802), the output end of the stepping motor (801) is fixedly mounted with the rotating shaft (802), the rotating shaft (802) longitudinally passes through the water inlet channel (20) and is connected to its bearing; A rack (803), wherein the rack (803) is fixedly mounted on both the front and rear sides of the top surface of one of the transverse plates (604); Gears (804), gears (804) corresponding to the racks (803) are fixedly mounted on the rotating shaft (802), and the gears (804) are respectively meshed with the corresponding racks (803).

6. A device for intercepting and draining sand in a hydraulic project according to claim 5, characterized in that: Slide grooves (805) are respectively provided at the inner wall of the water inlet channel (20) at the two ends of the horizontal plate (604) opposite to each other. Slide blocks (806) are respectively fixedly mounted at the two ends of the horizontal plate (604). The slide blocks (806) are respectively located in the corresponding slide grooves (805) and slidably cooperate with them.

7. A device for intercepting and draining sediment in a hydraulic project according to claim 1, characterized in that: A vertical cylinder (90) with an open top surface is fixedly mounted on the top surface of the rotating disk (401), and the outer side of the vertical cylinder (90) is fixedly connected to a side opposite to the guide plate (403).

8. A device for intercepting and draining sediment in a hydraulic project according to claim 7, characterized in that: A plurality of evenly distributed overflow grooves (408) are provided near the center of the top surface of the rotating disk (401), and the upper end of the vertical cylinder (90) is lower than the top surface of the sedimentation tank (10).

9. A device for intercepting and draining sediment in a hydraulic project according to claim 1, characterized in that: The diversion trough (402) is a downwardly inclined trough.

10. A device for intercepting and draining sediment in a hydraulic project according to claim 1, characterized in that: A water retaining plate (103) is fixedly mounted on one side of the inner wall of the desilting tank (10).

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