An irrigation channel flow measurement device

Abstract

The present invention discloses an irrigation channel flow measurement device, which relates to the field of flow measurement technology. The present invention comprises a mounting base, a Parshall flume, and an ultrasonic flowmeter. The Parshall flume is fixedly mounted in the mounting base, and the ultrasonic flowmeter is mounted on the Parshall flume via a mounting rod. The present invention also comprises an interception plate, which is rotatably mounted on the Parshall flume via a rotating rod, and the interception plate is tilted backward from the upstream contraction section of the Parshall flume to the short straight throat section. An impact detection assembly is installed between the rotating rod and the Parshall flume, and the impact detection assembly is used to detect the impact force of the water flow on the interception plate. The advantage is that the present invention can automatically complete the dredging of the interception plate and the Parshall flume according to changes in the water flow rate and the changes in the water impact force on the interception plate, which can effectively improve the accuracy of water flow measurement. At the same time, it can also ensure the water discharge speed when the water flow rate is large, ensuring the stability of the device during flood discharge.

Description

Technical Field

[0001] The present invention relates to the technical field of flow measurement, in particular to an irrigation channel flow measurement device. Background Art

[0002] Irrigation channels are an important part of the farmland water conservancy irrigation system. They are used to transport and distribute water drawn from water sources to various parts of the irrigation area to meet the water requirements of crops. In order to ensure that the irrigation system operates according to the design requirements and avoid excessive or insufficient irrigation, it is necessary to measure the water flow in the irrigation channels.

[0003] After searching, the patent document with publication number CN221425729U discloses a sewage flow monitoring device based on an open channel flow meter, including a Parshall open channel trough, a bracket is fastened to the upper end of the rear side of the Parshall open channel trough, a support plate is fixedly connected to the top of the bracket, a water flow monitor body is installed in the middle of the support plate, and the bottom of the water flow monitor body is connected to the monitoring probe.

[0004] The above-mentioned sewage flow monitoring device based on open channel flow meter has the following shortcomings:

[0005] When intercepting impurities, it is impossible to salvage larger impurities (such as branches, plastic bags, etc.). The accumulation of these large impurities will affect the normal flow of the water body, causing deviations in the measurement results. When the water flow is large or irrigation channels need to be used for flood discharge, the presence of the filter will affect the water discharge rate. At the same time, the impact of the water body will also cause damage to the filter. Therefore, it is necessary to design an irrigation channel flow measurement device. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides an irrigation channel flow measurement device, which solves the problems raised in the above background technology.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An irrigation channel flow measurement device includes a mounting base, a Parshall flume, and an ultrasonic flowmeter, wherein the Parshall flume is fixedly mounted in the mounting base, and the ultrasonic flowmeter is mounted on the Parshall flume via a mounting rod, and further includes:

[0009] An interceptor plate is rotatably mounted on the Parshall flume via a rotating rod, and is tilted backward from the upstream contraction section of the Parshall flume to the short straight throat section. An impact detection assembly is installed between the rotating rod and the Parshall flume, and is used to detect the impact force of the water flow on the interceptor plate;

[0010] A rotating drum, which is rotatably mounted on the Parshall trough via a rotating shaft, and has multiple sets of fishing claws that cooperate with the interception plates fixedly mounted on the side walls of the rotating drum. The rotating drum is hollow and has multiple through slots formed thereon, each of which cooperates with a corresponding set of fishing claws. A shielding assembly is installed in each through slot, which is used to shield the through slot. Two touch components are installed on the Parshall trough, which are used to control the opening of the multiple shielding components.

[0011] A driving unit, which is used to drive the rotation of the rotating shaft, and includes a driving motor fixedly mounted on the side wall of the Parshall trough, and the driving motor cooperates with the impact detection assembly;

[0012] A lifting unit, the lifting unit is used to control the height of the mounting rod and the rotating drum on the Parshall trough, and the lifting unit cooperates with the impact detection assembly;

[0013] The cleaning part is used to clean the inside of the drum when the lifting part is in operation.

[0014] Furthermore, the impact detection assembly consists of a positioning plate, a torsion spring, a touch block, a waterproof cover and two touch switches. The positioning plate is fixedly mounted on the end of the rotating rod outside the Parshall slot, the torsion spring is installed between the positioning plate and the side wall of the Parshall slot, the touch block is fixedly mounted on the side wall of the positioning plate, the waterproof cover is fixedly mounted on the side wall of the Parshall slot, the two touch switches are fixedly mounted on the inner wall of the waterproof cover, and both touch switches cooperate with the touch block.

[0015] Furthermore, the output end of the drive motor is fixedly connected to the drive gear, a fixed ring gear is fixedly installed on the rotating shaft, and the fixed ring gear is engaged with the drive gear, a servo motor is fixedly installed on the side wall of the Parshall slot, and the output end of the servo motor is fixedly connected to the end of the rotating rod away from the positioning plate, the touch switch close to the touch block is electrically connected to the drive motor, the other touch switch is electrically connected to the servo motor, and the ultrasonic flowmeter is electrically connected to the drive motor and the servo motor.

[0016] Furthermore, the shielding assembly consists of an arc-shaped baffle, a receiving groove, a moving block, an arc-shaped groove and an arc-shaped spring. The receiving groove is opened on the side wall of the through groove. The arc-shaped baffle is slidably installed in the receiving groove, and the size of the arc-shaped baffle is larger than the size of the through groove. Moving blocks are fixedly installed on the front and rear side walls of the arc-shaped baffle. Arc-shaped grooves matching the corresponding moving blocks are opened on the front and rear side walls of the through groove. Arc springs are installed between the two moving blocks and the corresponding arc-shaped grooves.

[0017] Furthermore, the touch assembly consists of a fixed block, a convex rod, a T-rod, a T-slot and a compression spring. The fixed block is fixedly installed on the upper side wall of the Parshall slot, the T-slot is opened at the end of the fixed block close to the rotating cylinder, the T-rod is slidably installed in the T-slot, the convex rod is fixedly installed at the end of the T-rod close to the rotating cylinder, and the position of the convex rod corresponds to that of the movable block. The compression spring is installed between the T-rod and the T-slot, and the side of the convex rod close to the rotating cylinder is arc-shaped.

[0018] Furthermore, the lifting part includes two mounting plates fixedly mounted on the side walls of the Parshall trough, and electric telescopic rods are fixedly mounted on the two mounting plates, the output ends of the two electric telescopic rods are fixedly connected to the mounting rods, and the two electric telescopic rods are electrically connected to the ultrasonic flow meter and a touch switch away from the touch block, and a connecting rod that rotates with the rotating shaft is fixedly mounted on the side wall of the mounting rod.

[0019] Furthermore, the cleaning part includes a screw rod rotatably installed in the rotating drum, and a push plate is threadedly installed on the screw rod and slides with the rotating drum. A fixed gear is fixedly installed on the end of the screw rod away from the rotating shaft, and a fixed rack that cooperates with the fixed gear is fixedly installed on the Parshall groove.

[0020] Furthermore, a support rod is fixedly mounted on one end of the mounting rod away from the connecting rod, and a guide plate that cooperates with the push plate is fixedly mounted on the support rod.

[0021] Furthermore, the mounting seat is provided with two cavities, and the two cavities are respectively matched with the corresponding connecting rod and supporting rod, and the mounting seat is provided with a plurality of clamping grooves.

[0022] Furthermore, a solar panel is fixedly mounted on the mounting base, and a battery for storing electrical energy is also mounted on the mounting base, and the battery is electrically connected to the ultrasonic flow meter, drive motor, servo motor, touch switch and electric telescopic rod.

[0023] Compared with the existing technology, the advantages of the present invention are:

[0024] 1: Through the design of the salvage claws and the through slots, large-sized impurities accumulated on the interception plate can be salvaged and collected in the drum, avoiding the problem of large-sized impurities continuously accumulating and affecting the water flow effect, which can effectively improve the accuracy of water flow measurement.

[0025] 2: Through the cooperation of the impact detection component and the lifting part, the operation of the fishing claw can be automatically controlled according to the changes in the water impact force on the interception plate, and the angle of the interception plate and the height of the fishing claw can be automatically adjusted according to the changes in the water flow, so as to maintain the water discharge speed and the dredging effect of the Parshall trough.

[0026] 3: Through the design of the cleaning part, large-sized impurities collected in the drum can be automatically discharged according to the height change of the salvage claw, which can effectively improve the drum's continuous collection effect on large-sized impurities. There is no need for manual cleaning, which effectively reduces labor costs.

[0027] To sum up, the present invention can automatically complete the dredging of the interception plate and the Parshall trough according to the changes in water flow and the changes in the water impact force on the interception plate, which can effectively improve the accuracy of water flow measurement. At the same time, it can also ensure the water discharge speed when the water flow is large, and ensure the stability of the device during flood discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of an irrigation channel flow measurement device proposed by the present invention;

[0029] Figure 2 for Figure 1 Schematic diagram of the structure after removing the solar panels;

[0030] Figure 3 for Figure 2 A top view of

[0031] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure of the AA surface;

[0032] Figure 5 for Figure 2 Schematic diagram of the structure after removing the mounting base;

[0033] Figure 6 for Figure 5 Schematic diagram of the structure at the Middle Parshall Trough;

[0034] Figure 7 for Figure 5 Schematic diagram of the structure where the Parshall trough is removed;

[0035] Figure 8 for Figure 7 Schematic diagram of the structure at the middle mounting rod;

[0036] Figure 9 for Figure 7 Schematic diagram of the structure at the rotating drum;

[0037] Figure 10 for Figure 7 Schematic diagram of the structure at the transfer pole;

[0038] Figure 11 for Figure 7 Schematic diagram of the internal structure of the rotating drum.

[0039] In the figure: 1. Mounting base; 2. Parshall trough; 3. Mounting rod; 4. Ultrasonic flowmeter; 5. Rotating rod; 6. Interceptor plate; 7. Rotating shaft; 8. Rotating drum; 9. Salvage claw; 10. Through groove; 11. Arc baffle; 12. Moving block; 13. Arc groove; 14. Arc spring; 15. Fixed block; 16. Driving motor; 17. Driving gear; 18. Fixed gear ring; 19. Positioning plate; 20. Torsion spring; 21. Touch block; 22. Waterproof cover; 23. Touch switch; 24. Servo motor; 25. Mounting plate; 26. Electric telescopic rod; 27. Connecting rod; 28. Screw; 29. Push plate; 30. Fixed gear; 31. Fixed rack; 32. Cavity; 33. Support rod; 34. Guide plate; 35. Snap-in groove; 36. Solar panel. DETAILED DESCRIPTION

[0040] Reference Figure 1 , an irrigation channel flow measuring device includes a mounting base 1, a Parshall flume 2 and an ultrasonic flowmeter 4. The Parshall flume 2 is fixedly installed in the mounting base 1. The Parshall flume 2 is a short throat water measuring flume, usually composed of three parts: an upstream contraction section, a short straight throat and a downstream diffusion section. The bottom of the upstream contraction section is inclined downstream, while the inclination direction of the bottom of the diffusion section is opposite to that of the throat flume. This design enables the Parshall flume 2 to establish a fixed correspondence between flow and water level through throttling. The ultrasonic flowmeter 4 is installed on the Parshall flume 2 through the mounting rod 3. The ultrasonic flowmeter 4 is a common device for measuring fluid flow using ultrasonic technology. Its working principle and specific structure are not elaborated here.

[0041] Reference Figures 1-11 , an irrigation channel flow measuring device also includes an interception plate 6, which is rotatably installed on the Parshall trough 2 through a rotating rod 5, and the interception plate 6 is tilted backward from the upstream contraction section of the Parshall trough 2 to the short straight throat section. This inclined shape design allows the intercepted large-sized impurities to be located near the water surface on the interception plate 6 under the action of water flow, thereby reducing the blocking effect of large-sized impurities on the interception plate 6 to a certain extent, improving the circulation effect of the water body, and also facilitating the subsequent cleaning of large-sized impurities.

[0042] An impact detection component is installed between the rotating rod 5 and the Parshall trough 2. The impact detection component is used to detect the water flow impact force on the intercepting plate 6. The impact detection component consists of a positioning plate 19, a torsion spring 20, a touch block 21, a waterproof cover 22 and two touch switches 23. The positioning plate 19 is fixedly installed at the end of the rotating rod 5 outside the Parshall trough 2, and the torsion spring 20 is installed between the positioning plate 19 and the side wall of the Parshall trough 2. By selecting the specifications of the torsion spring 20, the intercepting plate 6 can maintain the same installation angle when it is not subjected to a large impact force. At this time, its interception effect on large-sized impurities can be guaranteed. When the water flow impact is large or the large-sized impurities accumulated on the intercepting plate 6 reach a certain number and the impact it receives increases, the torsion spring 20 can be deformed to a certain extent, so that the intercepting plate 6 can be deflected to the right by a certain angle (with Figure 7 direction shown as an example);

[0043] The touch block 21 is fixedly mounted on the side wall of the positioning plate 19, the waterproof cover 22 is fixedly mounted on the side wall of the Parshall trough 2, and the two touch switches 23 are fixedly mounted on the inner wall of the waterproof cover 22, and the two touch switches 23 are both coordinated with the touch block 21. Specifically, the initial inclination angle of the intercepting plate 6 is set to 15°, the angle between the touch block 21 and the first touch switch 23 is set to 15°, and the angle between the two touch switches 23 is set to 20°. When the intercepting plate 6 is deflected under the action of impact, the touch block 21 will rotate with the rotating rod 5 at the same time, so that its position relationship relative to the two touch switches 23 can be changed accordingly, thereby realizing the touch of the two touch switches 23.

[0044] The hopper 8 is provided with a plurality of through slots 10, each of which is engaged with a corresponding set of hopper claws 9. The hopper 8 is provided with a plurality of through slots 10, each of which is engaged with a corresponding set of hopper claws 9. The hopper 8 is provided with a plurality of through slots 10, each of which is engaged with a corresponding set of hopper claws 9. The hopper 8 is provided with a plurality of through slots 10, each of which is engaged with a corresponding set of hopper claws 9. The hopper 8 is provided with a plurality of through slots 10,

[0045] Each through slot 10 is equipped with a shielding assembly, which is used to shield the through slot 10. The shielding assembly consists of an arc-shaped baffle 11, a receiving slot, a moving block 12, an arc-shaped slot 13 and an arc spring 14. The receiving slot is opened on the side wall of the through slot 10. The arc-shaped baffle 11 is slidably installed in the receiving slot, and the size of the arc-shaped baffle 11 is larger than the size of the through slot 10. The moving block 12 is fixedly installed on the front and rear side walls of the arc-shaped baffle 11. The front and rear side walls of the through slot 10 are provided with corresponding moving blocks. The arc-shaped groove 13 that matches the block 12, and arc springs 14 are installed between the two moving blocks 12 and the corresponding arc-shaped grooves 13. The arc-shaped baffle 11 is used to block the through groove 10 to prevent large-sized impurities that fall into it from falling again. The elastic force of the arc spring 14 can enable the arc-shaped baffle 11 to effectively maintain the blocking effect on the through groove 10 when it is not pushed by external force. At the same time, in order to reduce the weight of the rotating drum 8 and discharge the moisture in the impurities, a corresponding number of drainage holes can also be set on the arc-shaped baffle 11.

[0046] Two touch components are installed on the Parshall slot 2. The touch components are used to control the opening of multiple shielding components. The touch components are composed of a fixed block 15, a convex rod, a T-rod, a T-slot and a compression spring. The fixed block 15 is fixedly installed on the upper side wall of the Parshall slot 2. The T-slot is opened at the end of the fixed block 15 close to the rotating cylinder 8. The T-rod is slidably installed in the T-slot. The convex rod is fixedly installed at the end of the T-rod close to the rotating cylinder 8, and the convex rod corresponds to the position of the moving block 12. The compression spring is installed between the T-rod and the T-slot. The side of the convex rod close to the rotating cylinder 8 is arc-shaped. When the rotating cylinder 8 rotates and drives the moving block 12 close to the convex rod and contacts the convex rod, the protruding design of the convex rod will hinder the movement of the moving block 12. At this time, the moving block 12 overcomes the elastic force of the arc spring 14 so that the arc baffle 1 1 enters the receiving groove from the through groove 10, then the through groove 10 is opened, and then the rotating drum 8 continues to rotate, allowing large-sized impurities on the salvage claw 9 to fall into the rotating drum 8 through the through groove 10. When the moving block 12 moves to the maximum distance, it can no longer move relative to the rotating drum 8, and the rotation of the rotating drum 8 drives the moving block 12 to continue to move. Therefore, the squeezing effect exerted by the moving block 12 on the protruding rod will cause the T-shaped rod to overcome the elastic force of the compression spring and enter the T-shaped groove, so that the moving block 12 can smoothly pass through the protruding rod. Thereafter, under the elastic force of the arc spring 14, the arc baffle 11 is reset in the through groove 10 and continues to keep covering the through groove 10. Through the above actions, the effective collection of large-sized impurities can be automatically achieved. The protruding rod, T-shaped rod, T-shaped groove and compression spring are not shown in the figure.

[0047] The driving part is used to drive the rotation of the rotating shaft 7. The driving part includes a driving motor 16 fixedly mounted on the side wall of the Parshall trough 2. The output end of the driving motor 16 is fixedly connected to a driving gear 17. A fixed ring gear 18 is fixedly mounted on the rotating shaft 7, and the fixed ring gear 18 is meshed with the driving gear 17. When the driving motor 16 is working, it drives the rotating drum 8 to rotate clockwise (with a rotation angle of 0.01). Figure 2 For example, at this time, the salvage claw 9 can rotate from the right side of the interception plate 6 to the left side, thereby salvaging large-sized impurities on it and driving them to the upper end position of the rotating drum 8, and then collecting them into the rotating drum 8 through the through groove 10. The touch switch 23 close to the touch block 21 is electrically connected to the drive motor 16. When the interception plate 6 is impacted and rotates, and the touch block 21 touches the first touch switch 23, the drive motor 16 can work automatically to make the rotating drum 8 rotate one circle, thereby salvaging large-sized impurities and improving the dredging performance of the interception plate 6.

[0048] A servo motor 24 is fixedly installed on the side wall of the Parshall trough 2, and the output end of the servo motor 24 is fixedly connected to the end of the rotating rod 5 away from the positioning plate 19, and another touch switch 23 is electrically connected to the servo motor 24. When large-sized impurities are salvaged but the interception plate 6 continues to deflect so that the touch block 21 touches the second touch switch 23, the servo motor 24 starts to run, so that the rotating rod 5 drives the interception plate 6 to continue to deflect to the right until it is level with the bottom of the Parshall trough 2. At this time, the interception plate 6 does not intercept impurities in the water body, allowing the water body to pass quickly, and can effectively dredge the Parshall trough 2. The ultrasonic flowmeter 4 is electrically connected to the drive motor 16 and the servo motor 24. Through this design, the drive control of the drive motor 16 and the servo motor 24 can be realized according to the flow detected by the ultrasonic flowmeter 4. When the detected water flow is less than the set flow rate, the ultrasonic flowmeter 4 causes the drive motor 16 to run and drive the salvage claw 9 to The interception plate 6 is cleaned. When the water flow is normal after the cleaning is completed, the drive motor 16 stops running. When the water flow is still small after the cleaning is completed, the ultrasonic flowmeter 4 causes the servo motor 24 to operate the interception plate 6 to deflect to the right to a horizontal state, so that impurities on the interception plate 6 can pass through better, and the mud and sand accumulated at the bottom of the interception plate 6 can also pass through better; when the water flow detected by the ultrasonic flowmeter 4 is large, it will also cause the interception plate 6 to deflect to the right to a horizontal state, ensuring that the water passes quickly and improving the flood discharge effect; when the water flow detected by the ultrasonic flowmeter 4 is within the normal range, it will cause the servo motor 24 to work in reverse to drive the interception plate 6 to reset, and then the operation of the drive motor 16 and the servo motor 24 is controlled by the normal deflection of the interception plate 6. The above effects can be achieved by using a controller and setting corresponding data parameters in the controller. The controller is an existing product, and its working principle and specific structure are not explained here.

[0049] The lifting part is used to control the height of the mounting rod 3 and the rotating drum 8 on the Parshall trough 2. The lifting part includes two mounting plates 25 fixedly mounted on the side walls of the Parshall trough 2, and the two mounting plates 25 are fixedly mounted with electric telescopic rods 26. The output ends of the two electric telescopic rods 26 are fixedly connected to the mounting rod 3. The two electric telescopic rods 26 are electrically connected to the ultrasonic flowmeter 4 and a touch switch 23 away from the touch block 21. A connecting rod 27 that rotates with the rotating shaft 7 is fixedly mounted on the side wall of the mounting rod 3. When the electric telescopic rod 26 is in operation, it can drive the mounting rod 3 relative to the Parshall trough 2 It moves up and down, thereby driving the rotating drum 8 to move up and down relative to the Parshall trough 2. When the intercepting plate 6 is deflected by the impact force and the second touch switch 23 is touched, the electric telescopic rod 26 is extended at the same time, so that the salvage claw 9 moves upward out of the Parshall trough 2. At this time, the salvage claw 9 will not affect the flow of water, so that the water and impurities on the intercepting plate 6 can pass through faster; when the intercepting plate 6 is controlled by the ultrasonic flowmeter 4 to rotate to the horizontal, the electric telescopic rod 26 will also extend, so that the salvage claw 9 moves upward, and when the water flow is normal, the electric telescopic rod 26 will retract and reset, so that the salvage claw 9 re-enters the Parshall trough 2.

[0050] The cleaning part is used to clean the inside of the drum 8 when the lifting part is running. The cleaning part includes a screw rod 28 rotatably installed in the drum 8, and a push plate 29 is threadedly installed on the screw rod 28 and slides with the drum 8. A fixed gear 30 is fixedly installed on the end of the screw rod 28 away from the rotating shaft 7, and a fixed rack 31 that cooperates with the fixed gear 30 is fixedly installed on the Parshall trough 2. When the drum 8 moves up, the screw rod 28 is driven to move up at the same time. After the drum 8 moves to a certain height, the fixed gear 30 on the screw rod 28 and the fixed rack 31 engage with each other. At this time, as the drum 8 continues to move up, the screw rod 28 will be driven to rotate, so that the push plate 29 moves in the drum 8 toward the end close to the fixed rack 31, and the large-sized impurities collected in the drum 8 are discharged, so that the drum 8 can continue to collect and process large-sized impurities.

[0051] Two cavities 32 are provided on the mounting base 1, and the two cavities 32 are respectively matched with the corresponding connecting rods 27 and support rods 33. A plurality of snap-in grooves 35 are provided on the mounting base 1. The design of the snap-in grooves 35 facilitates fixing the mounting base 1 in the irrigation channel. A support rod 33 is fixedly installed on the end of the mounting rod 3 away from the connecting rod 27, and a guide plate 34 that cooperates with the push plate 29 is fixedly installed on the support rod 33. The design of the guide plate 34 can guide the falling of large-sized impurities in the rotating drum 8 when discharging them, so that they can fall on the side of the mounting base 1, thereby preventing large-sized impurities from entering the cavity 32 and causing abnormal operation of the device in the subsequent operation.

[0052] A solar panel 36 is fixedly mounted on the mounting base 1. A battery for storing electrical energy is also mounted on the mounting base 1. The battery is electrically connected to the ultrasonic flow meter 4, the drive motor 16, the servo motor 24, the touch switch 23 and the electric telescopic rod 26. The design of the solar panel 36 can provide energy for the operation of the device. At the same time, the inclined design of the top of the solar panel 36 can also provide a certain shielding and protection effect on the ultrasonic flow meter 4, the drive motor 16, the servo motor 24 and the electric telescopic rod 26. The solar panel 36, the battery ultrasonic flow meter 4, the drive motor 16, the servo motor 24, the touch switch 23 and the electric telescopic rod 26 are all existing products, and their working principles and specific structures are not elaborated here.

[0053] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. An irrigation channel flow measurement device, comprising a mounting base (1), a Parshall flume (2), and an ultrasonic flowmeter (4), wherein the Parshall flume (2) is fixedly mounted in the mounting base (1), and the ultrasonic flowmeter (4) is mounted on the Parshall flume (2) via a mounting rod (3), characterized in that: Also includes: An interception plate (6), the interception plate (6) is rotatably mounted on the Parshall trough (2) via a rotating rod (5), and the interception plate (6) is arranged to be tilted backward from the upstream contraction section of the Parshall trough (2) to the short straight throat section, an impact detection component is installed between the rotating rod (5) and the Parshall trough (2), and the impact detection component is used to detect the impact force of the water flow on the interception plate (6), and the impact detection component includes two touch switches (23); A rotating drum (8), wherein the rotating drum (8) is rotatably mounted on the Parshall trough (2) via a rotating shaft (7), and a plurality of groups of salvage claws (9) cooperating with the interception plate (6) are fixedly mounted on the side wall of the rotating drum (8), the rotating drum (8) is hollow, and a plurality of through slots (10) are provided on the rotating drum (8), each of the through slots (10) is respectively cooperating with a corresponding group of salvage claws (9), and a shielding component is installed in each of the through slots (10), and the shielding component is used to shield the through slot (10), and two touch components are installed on the Parshall trough (2), and the touch components are used to control the opening of the plurality of shielding components; A driving unit, the driving unit is used to drive the rotation of the rotating shaft (7), the driving unit comprising a driving motor (16) fixedly mounted on the side wall of the Parshall trough (2), and the driving motor (16) cooperates with the impact detection component; A lifting part, the lifting part is used to control the height of the mounting rod (3) and the rotating drum (8) on the Parshall trough (2), the lifting part cooperates with the impact detection component, and the lifting part includes an electric telescopic rod (26); A cleaning portion, the cleaning portion is used to clean the inside of the rotating drum (8) when the lifting portion is in operation, the cleaning portion comprising a screw (28) rotatably mounted in the rotating drum (8), and a push plate (29) threadedly mounted on the screw (28) and slidingly engaged with the rotating drum (8), a fixed gear (30) fixedly mounted on one end of the screw (28) away from the rotating shaft (7), and a fixed rack (31) engaged with the fixed gear (30) fixedly mounted on the Parshall trough (2); The intercepting plate (6) is deflected by the impact force and touches the two touch switches (23) in turn. When the second touch switch (23) is touched, the electric telescopic rod (26) is extended at the same time, so that the salvage claw (9) moves upward from the Parshall trough (2); when the rotating drum (8) moves upward, the screw rod (28) is driven to move upward at the same time. After the rotating drum (8) moves up to a certain height, the fixed gear (30) on the screw rod (28) and the fixed rack (31) are engaged with each other.

2. The irrigation channel flow measurement device according to claim 1, characterized in that: The impact detection assembly further comprises a positioning plate (19), a torsion spring (20), a touch block (21) and a waterproof cover (22), wherein the positioning plate (19) is fixedly mounted on one end of the rotating rod (5) outside the Parshall slot (2), the torsion spring (20) is mounted between the positioning plate (19) and the side wall of the Parshall slot (2), the touch block (21) is fixedly mounted on the side wall of the positioning plate (19), the waterproof cover (22) is fixedly mounted on the side wall of the Parshall slot (2), and the two touch switches (23) are both fixedly mounted on the inner wall of the waterproof cover (22), and the two touch switches (23) are both matched with the touch block (21).

3. The irrigation channel flow measurement device according to claim 2, characterized in that: The output end of the driving motor (16) is fixedly connected to the driving gear (17), a fixed gear ring (18) is fixedly mounted on the rotating shaft (7), and the fixed gear ring (18) is meshed with the driving gear (17), a servo motor (24) is fixedly mounted on the side wall of the Parshall slot (2), and the output end of the servo motor (24) is fixedly connected to the end of the rotating rod (5) away from the positioning plate (19), a touch switch (23) close to the touch block (21) is electrically connected to the driving motor (16), and another touch switch (23) is electrically connected to the servo motor (24), and the ultrasonic flowmeter (4) is electrically connected to the driving motor (16) and the servo motor (24).

4. The irrigation channel flow measurement device according to claim 1, characterized in that: The shielding assembly consists of an arc-shaped baffle (11), a receiving groove, a moving block (12), an arc-shaped groove (13) and an arc-shaped spring (14). The receiving groove is provided on the side wall of the through groove (10). The arc-shaped baffle (11) is slidably installed in the receiving groove, and the size of the arc-shaped baffle (11) is larger than the size of the through groove (10). The moving blocks (12) are fixedly installed on the front and rear side walls of the arc-shaped baffle (11). The front and rear side walls of the through groove (10) are provided with arc-shaped grooves (13) that match the corresponding moving blocks (12). Arc-shaped springs (14) are installed between the two moving blocks (12) and the corresponding arc-shaped grooves (13).

5. The irrigation channel flow measurement device according to claim 4, characterized in that: The touch control assembly consists of a fixed block (15), a convex rod, a T-shaped rod, a T-shaped slot and a compression spring. The fixed block (15) is fixedly mounted on the upper side wall of the Parshall slot (2). The T-shaped slot is provided at one end of the fixed block (15) close to the rotating cylinder (8). The T-shaped rod is slidably mounted in the T-shaped slot. The convex rod is fixedly mounted at one end of the T-shaped rod close to the rotating cylinder (8), and the position of the convex rod corresponds to that of the moving block (12). The compression spring is mounted between the T-shaped rod and the T-shaped slot. The side of the convex rod close to the rotating cylinder (8) is arc-shaped.

6. The irrigation channel flow measurement device according to claim 1, characterized in that: The lifting part also includes two mounting plates (25) fixedly mounted on the side walls of the Parshall trough (2), and the two mounting plates (25) are respectively fixedly connected to the corresponding electric telescopic rods (26), the output ends of the two electric telescopic rods (26) are fixedly connected to the mounting rod (3), and the two electric telescopic rods (26) are electrically connected to the ultrasonic flow meter (4) and a touch switch (23) away from the touch block (21), and a connecting rod (27) that rotates with the rotating shaft (7) is fixedly mounted on the side wall of the mounting rod (3).

7. The irrigation channel flow measurement device according to claim 6, characterized in that: A support rod (33) is fixedly mounted on one end of the mounting rod (3) away from the connecting rod (27), and a guide plate (34) that matches the push plate (29) is fixedly mounted on the support rod (33).

8. The irrigation channel flow measurement device according to claim 7, characterized in that: Two cavities (32) are provided on the mounting seat (1), and the two cavities (32) respectively cooperate with corresponding connecting rods (27) and supporting rods (33). A plurality of clamping grooves (35) are provided on the mounting seat (1).

9. The irrigation channel flow measurement device according to claim 3, characterized in that: A solar panel (36) is fixedly mounted on the mounting base (1), and a battery for storing electric energy is also mounted on the mounting base (1), and the battery is electrically connected to the ultrasonic flow meter (4), the drive motor (16), the servo motor (24), the touch switch (23), and the electric telescopic rod (26).

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