River flow measurement lead fish position automatic control device and method

Abstract

The application discloses a kind of river flow measurement lead fish position automatic control device and method, belong to river detection technical field;It includes lead fish, lead fish platform and support platform, the lead fish platform is fixedly installed with lead fish limiter, the lead fish is fixedly installed with counterweight, the lead fish is fixedly installed with monitoring assembly, the lead fish is fixedly installed with vertical cable, the support platform is fixedly connected with control assembly, the lead fish is fixedly installed with fixed cylinder, the lead fish is fixedly installed with cutting assembly.The application adopts "stop walking flow measurement + stop point obstacle removal" time-sharing operation mode, completely decouples obstacle removal action and flow measurement action in time, all obstacle removal structures are stationary during flow measurement stage, completely avoid the disturbance of obstacle removal action on flow regime in flow measurement area, ensure the authenticity and accuracy of flow velocity data acquisition.

Description

Technical Field

[0001] This invention relates to the field of river detection technology, and in particular to an automatic control device and method for the position of a lead weight used in river flow measurement. Background Technology

[0002] River hydrological flow monitoring is a core foundation for water resource management, flood control and disaster reduction, and operation and maintenance of water conservancy projects. The lead-fish cableway flow measurement system has become the mainstream hydrological flow measurement equipment at home and abroad because it is suitable for rivers with high flow velocity, deep water level, and complex terrain. The traditional lead-fish flow measurement system mainly consists of a cableway trolley, lifting steel rope, streamlined lead-fish body, and flow velocity measurement sensor. The trolley is driven by a motor to move horizontally along the main cable, sending the lead-fish to the designated velocity measurement vertical line. Then, the lifting steel rope controls the vertical rise and fall of the lead-fish on the vertical line to complete the multi-point flow velocity acquisition. However, in actual operation, firstly, the problem of debris entanglement in the river is prominent, seriously affecting the accuracy of flow measurement and equipment safety. Natural rivers commonly contain debris such as branches, aquatic plants, and floating garbage. During the lowering, flow measurement, and return of the lead weight, these debris easily become entangled at the connection between the lifting steel cable and the lead weight, as well as on the surface of the lead weight itself. Entanglement of debris will disrupt the streamlined shape of the lead weight, generating asymmetrical lateral water flow resistance, causing the lead weight to deviate from its upstream attitude and increase its overall sway angle, making it impossible for the current meter / ADCP probe to be directly aligned with the water flow, resulting in distorted flow measurement data. At the same time, entangled debris will increase the load on the steel cable, causing abnormal tension, or even jamming the lifting mechanism, leading to safety accidents such as motor overload and steel cable breakage. This problem is even more severe in mountainous rivers with high sand content and abundant vegetation, and in rivers during the flood season. Therefore, this paper provides an automatic control device and method for the position of a lead weight for river flow measurement. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology by proposing an automatic control device and method for the position of a river flow measuring lead weight.

[0004] The present invention adopts the following technical solution: An automatic control device for the position of a lead weight in river flow measurement includes a lead weight, a lead weight platform, and a support platform. The lead weight platform is fixedly equipped with a lead weight limiter, the lead weight is fixedly equipped with a counterweight, the lead weight is fixedly equipped with a monitoring component, the lead weight is fixedly equipped with a vertical cable, the support platform is fixedly connected to a control component, the lead weight is fixedly equipped with a fixing cylinder, and the lead weight is fixedly equipped with a cutting component. The cutting component can cut the aquatic plants wrapped around the vertical cable and the outside of the fixing tube, so that the lead fish can always maintain a normal working state. The cutting assembly includes a cavity inside the lead weight, a control plate is slidably mounted in the cavity, a fixed cylinder is fixedly connected to the control plate via an adjustment rod, a cutting cylinder is rotatably sleeved on the fixed cylinder, the cutting cylinder has multiple through holes in its circumference, multiple fixed sleeves are fixedly connected to the cutting cylinder, a movable sleeve is slidably connected to the fixed sleeve, and a cutter is fixedly connected to the movable sleeve. A rotating assembly is fixedly installed inside the cavity.

[0005] Preferably, the rotating assembly includes a control motor fixedly installed in the cavity, a connecting ring fixedly connected to the moving sleeve, a slider fixedly connected to the connecting ring, an annular groove on the fixed cylinder, the slider and the annular groove being slidably connected, an internal gear ring fixedly connected to the cutting cylinder, an adjusting shaft rotatably connected to the fixed cylinder, a rotating gear fixedly connected to the adjusting shaft, the rotating gear meshing with the internal gear ring, a control shaft fixedly connected to the output end of the control motor, two control gears fixedly sleeved on the control shaft, two control racks slidably connected to the cavity, the control racks meshing with the control gears, a cam fixedly connected to the control shaft, two slide rods symmetrically slidably connected to the cam, the two slide rods being fixedly connected to the control plate, a telescopic rod fixedly connected to the control rack, a transverse rack fixedly connected to the telescopic rod, the transverse rack slidably connected to the control plate, an adjusting rack fixedly connected to the transverse rack, and an adjusting gear fixedly connected to the adjusting shaft, the adjusting gear meshing with the adjusting rack.

[0006] Preferably, a flushing assembly is fixedly installed inside the lead fish. The flushing assembly can emit high-pressure water jets to flush away aquatic plants and branches on the outside of the fixed cylinder and the vertical cable, so that the lead fish and the vertical cable are kept in good working condition.

[0007] Preferably, the flushing assembly includes a pump body fixedly installed in a cavity, the pump body being fixedly connected to a movable water pipe, two square rods being symmetrically fixedly connected to the control board, a fixed frame being fixedly connected to the square rods, two positioning shafts being symmetrically fixedly connected inside the fixed frame, the positioning shafts being slidably connected to the movable water pipe, and a spring being fixedly connected between the movable water pipe and the fixed frame.

[0008] Preferably, the control board is rotatably connected to two fixed shafts, and the fixed shafts are fixedly sleeved with two guide gears. One of the guide gears is meshed with a transverse rack, the control board is slidably connected to a vertical rack, and the other guide gear is meshed with a vertical rack. The vertical rack is fixedly connected to a movable plate, and the movable plate is fixedly connected to two clamping rods.

[0009] Preferably, multiple round rods are uniformly fixedly connected to the side wall of the movable plate, and both ends of the multiple round rods are tapered.

[0010] Preferably, the fixed cylinder has an annular groove on its outer side, and a rotating ring is slidably sleeved in the annular groove, with the rotating ring and the cutting cylinder being fixedly connected.

[0011] Preferably, two fixed rods are fixedly connected inside the cavity, and the two fixed rods slide through the control rack.

[0012] Preferably, the control component includes fixed limiters fixedly mounted on a support platform, a fixed rail fixedly connected between the two fixed limiters, a movable platform slidably mounted on the fixed rail, two transverse circular plates rotatably mounted inside the movable platform, the transverse circular plates being arranged opposite to the fixed rail, a positioning frame fixedly connected to the movable platform, a vertical motor fixedly connected to the positioning frame, a vertical circular plate fixedly connected to the outer side of the output shaft of the vertical motor, a vertical cable wound around the vertical circular plate, and a transverse motor fixedly connected to the upper side of one of the support platforms, a transverse cable wound around the outer side of the output shaft of the transverse motor, and the transverse cable fixedly connected to the positioning frame.

[0013] A method for automatically controlling the position of a river current measuring lead weight includes the following steps: S1. Start the horizontal motor. The horizontal motor drives the positioning frame and the moving table to move as a whole through the horizontal cable, which in turn drives the vertical cable and the lead weight to move as a whole until the lead weight moves to the working position. S2. Start the vertical motor, which drives the vertical circular plate to rotate. The vertical circular plate moves the lead weight downward through the vertical cable, so that the lead weight is moved to the working position. Start the monitoring component to perform detection. S3. After the test is completed, the lead fish is removed from the test area again by the vertical motor and the horizontal motor. S4. If the fixed limiter or the lead weight limiter malfunctions during the testing process, the position of the lead weight should be adjusted in a timely manner using the horizontal and vertical motors, and testing and adjustment should be carried out promptly.

[0014] The beneficial effects of this invention are: 1. The system adopts a time-sharing operation mode of "stop-and-go flow measurement + fixed-point obstacle removal" to completely decouple the obstacle removal action from the flow measurement action in time. During the flow measurement phase, all obstacle removal structures are stationary and stored, which completely avoids the disturbance of the water flow in the flow measurement area by the obstacle removal action and ensures the authenticity and accuracy of the flow velocity data acquisition. During the obstacle removal phase, a coordinated mode of "first mechanical scraping and then high-pressure water jetting" is adopted, which can efficiently cut and remove branches, aquatic plants and other debris entangled at the connection between the lead weight and the rope. At the same time, the debris is flushed away to the downstream of the flow measurement area by directional water flow, which prevents secondary pollution and secondary entanglement. The obstacle removal efficiency is more than 60% higher than that of traditional fixed bar screens. 2. Tiered safety protection significantly improves equipment reliability. Fixed limit switches are installed at key locations, forming a triple safety mechanism of "normal travel limit + emergency power failure + abnormal tension bottoming protection," effectively preventing accidents such as lead weight overtravel, steel cable breakage, and motor overload burnout. Simultaneously, the fixed cylinder and bottom counterweight provide physical protection for the lead weight and sensors, reducing equipment failure rates caused by tree branch impacts and silt abrasion. This increases the continuous stable operation time of the device by more than three times under complex river conditions with high impurities and high flow velocities, while reducing maintenance costs by 40%. 3. Stable posture and precise positioning ensure the quality of flow measurement data. Through the coordinated design of the bottom counterweight and streamlined tail fin, the center of gravity of the lead weight is stably controlled near the central axis. Combined with the static storage design during the obstacle clearing stage, the lateral torque and posture sway caused by the obstacle clearing action are completely eliminated. This ensures that the lead weight maintains a stable posture with its head facing the flow during the flow measurement stage, with the ADCP probe facing the water flow directly. The deviation of the flow measurement data is controlled within ±2%. At the same time, the starting point return limiter is linked with the PLC positioning system to realize automatic calibration of the lead weight's position, ensuring that the deviation of the flow measurement point is less than 5cm for each measurement, which greatly improves the overall accuracy of full-section flow monitoring. 4. Modular and intelligent design, adaptable to unmanned operation requirements: The sensors and control modules of this invention adopt an external modular design, which can be quickly installed on the existing lead fish body without modifying the original cableway control system. It has strong adaptability and is easy to maintain. Through the dual triggering mechanism of tension sensor and infrared debris detection, it realizes intelligent control of "clearing obstacles only when there are obstacles, and clearing obstacles when there are no obstacles", avoiding power waste and equipment wear caused by ineffective actions. Combined with the remote monitoring platform, the obstacle clearing status and flow measurement data can be viewed in real time. It supports remote control and fault alarm of unattended stations, fully meeting the development requirements of "automation and intelligence" in modern hydrological monitoring. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an automatic control device for the position of a river flow measuring lead weight proposed in this invention; Figure 2 This is a schematic diagram of the automatic control device for the position of a river flow measuring lead weight proposed in this invention from another angle. Figure 3 This is a schematic diagram of the moving platform in an automatic control device for the position of a river flow measuring lead weight proposed in this invention. Figure 4 This is a schematic diagram of the lead weight structure in an automatic control device for the position of a lead weight in river flow measurement proposed in this invention. Figure 5 This is a cross-sectional view of the lead weight in an automatic control device for the position of a lead weight in river flow measurement proposed in this invention. Figure 6This is a cross-sectional view of the lead weight in an automatic control device for the position of a lead weight in a river flow measurement device proposed in this invention, from another angle. Figure 7 This is a schematic diagram of the control board and the cutting cylinder in an automatic control device for the position of a river flow measuring lead weight proposed in this invention; Figure 8 This is a schematic diagram of the control motor and control shaft in an automatic control device for the position of a river flow measuring lead weight proposed in this invention; Figure 9 This is a schematic diagram of the control board and guide gear in an automatic control device for the position of a river flow measuring lead weight proposed in this invention; Figure 10 for Figure 9 Enlarged view of the structure at point A in the middle; Figure 11 This is a schematic diagram of the fixed cylindrical structure in an automatic control device for the position of a lead weight in river flow measurement proposed in this invention. Figure 12 This is a cross-sectional view of the cut-off cylinder in an automatic control device for the position of a lead weight in river flow measurement proposed in this invention.

[0016] In the diagram: 1. Support platform; 2. Control component; 201. Moving platform; 202. Fixed track; 203. Fixed limiter; 204. Horizontal motor; 205. Horizontal cable; 206. Vertical cable; 207. Horizontal circular plate; 208. Positioning frame; 209. Vertical circular plate; 210. Vertical motor; 3. Lead weight platform; 4. Lead weight; 5. Lead weight limiter; 6. Counterweight; 7. Monitoring component; 8. Fixed cylinder; 9. Cutting component; 901. Cutting cylinder; 902. Through hole; 903. Control board; 904. Adjustment shaft; 905. Adjustment rod; 906. Adjustment gear; 907. Adjustment rack; 908. Fixed cylinder; 909. Inner... 910 Gear ring, 911 Rotating gear, 912 Annular groove, 913 Fixed sleeve, 914 Connecting ring, 915 Moving sleeve, 916 Cutter, 917 Rotating ring, 10 Control motor, 11 Cavity, 12 Fixed rod, 13 Control shaft, 14 Control gear, 15 Cam, 16 Slide rod, 17 Control rack, 18 Telescopic rod, 19 Fixed shaft, 20 Guide gear, 21 Vertical rack, 22 Horizontal rack, 23 Square rod, 24 Moving plate, 25 Fixed frame, 26 Round rod, 27 Moving water pipe, 28 Nozzle, 29 Positioning shaft, 30 Spring, 31 Clamping rod. Detailed Implementation

[0017] See Figures 1-12An automatic control device for the position of a lead weight in river flow measurement includes a lead weight 4, a lead weight platform 3, and two support platforms 1. A lead weight limiter 5 is fixedly installed inside the lead weight platform 3. A counterweight 6 is fixedly installed on the lower side of the lead weight 4 to provide sufficient weight so that the lead weight 4 can quickly sink to the predetermined water depth. At the same time, it lowers the center of gravity to ensure that the lead weight 4 keeps its head facing the current and its posture stable in the water flow, avoiding side-tipping or large swinging. The lead fish 4 is fixedly equipped with monitoring components 7, including an underwater camera and ADCP. The underwater camera collects underwater images in real time for visual monitoring: observing the attitude of the lead fish 4, the entanglement of debris, and the riverbed morphology to help judge the flow measurement environment. ADCP is an acoustic Doppler current meter that can directly measure the flow velocity profile of the river channel. It obtains flow velocity data of different water layers through acoustic signals and is the core sensor of modern hydrological flow measurement. In conjunction with the movement of the lead fish 4, it realizes mobile flow measurement, quickly completes full-section flow monitoring, replaces traditional single-point velocity measurement, and greatly improves efficiency. A vertical cable 206 is fixedly installed on the upper side of the lead weight 4. A control component 2 for controlling the movement of the vertical cable 206 is fixedly connected between the two support platforms 1. The control component 2 includes a fixed limiter 203 fixedly installed on the upper side of the support platform 1. A fixed rail 202 is fixedly connected between the two fixed limiters 203. A movable platform 201 is slidably installed on the outer side of the fixed rail 202. Two horizontal circular plates 207 are rotatably installed inside the movable platform 201. The horizontal circular plates 207 and the fixed rail 202 are arranged opposite to each other. A positioning frame 208 is fixedly connected to the outside of the moving platform 201. A vertical motor 210 is fixedly connected to the outside of the positioning frame 208. A vertical circular plate 209 is fixedly connected to the outside of the output shaft of the vertical motor 210. A vertical cable 206 is wound around the vertical circular plate 209. A horizontal motor 204 is fixedly connected to the upper side of one of the support platforms 1. A horizontal cable 205 is wound around the outside of the output shaft of the horizontal motor 204. The horizontal cable 205 is fixedly connected to the positioning frame 208. A fixed cylinder 8 is fixedly installed on the upper side of the lead fish 4. First, the fixed limit switch 203 is a key detection and control device in the lead weight 4 flow measurement system used to limit the travel and ensure equipment safety. It is usually installed in key locations such as cableways, cranes, and the lead weight 4 lifting path. Through mechanical contact or sensor detection, it triggers a signal when the equipment runs to the preset boundary, thereby forcibly stopping or cutting off the power and preventing equipment damage and safety accidents caused by overtravel. Secondly, two fixed limiters 203 are installed at the very close position of the lead weight 4. The first fixed limiter 203 is used for positioning and stopping. When the lead weight 4 moves backward and triggers the fixed limiter 203, it indicates that the lead weight 4 has moved to the predetermined position. It can be used to correct the starting position of the lead weight 4 and stop it immediately. The second fixed limiter 203 is used for emergency power cut-off. When the lead weight 4 moves backward and triggers the first fixed limiter 203, if the system does not stop due to a fault, it will continue to move backward and trigger the second fixed limiter 203. The second fixed limiter 203 is connected to the main power switch. After being triggered, the main power is immediately shut off to ensure system safety. Traditional cableways do not have the very close fixed limiter 203. When the lead weight 4 moves backward to the starting point, two people are required to align it with the starting point. One person controls the movement of the lead weight 4, and the other person observes the distance at the lead weight platform 3. This is not only labor-intensive, but also has low control accuracy. In addition, there is no emergency power cut-off protection function, which can easily lead to accidents after a fault occurs. Two fixed limit switches 203 are also fixedly installed on the mobile station 201. The first one is used for positioning and stopping at extremely high positions. If the system is out of control, the second fixed limit switch 203 will be triggered, and the system will immediately cut off the power to protect itself. Traditional cableways do not have this special feature. Cableway malfunctions or operator errors will cause accidents.

[0018] A steel rope tension monitoring device is installed at the end of the vertical cable 206. During the descent of the lead weight 4, if a malfunction occurs or the operator makes a mistake in observation, the steel rope tension will decrease after the lead weight 4 touches the ground, triggering the tension monitoring device. The device is connected to the main power supply and directly cuts off the main power supply to ensure system safety. Traditional cableways do not have tension monitoring devices, and if they continue to operate after touching the bottom, it will cause an accident.

[0019] A fixed limiter 203 is fixedly installed between the vertical cable 206 and the positioning frame 208. When the lead weight 4 moves forward, if the cableway becomes out of control or the operator is negligent, the lead weight 4 will continue to move forward. After triggering the fixed limiter 203, the system will stop immediately to ensure safety. Traditional cableways do not have this special feature. If the cableway becomes out of control or the operator is negligent, the system will not stop, which may cause an accident.

[0020] The lead fish platform 3 is equipped with a protective chamber for the lead fish 4, which protects the sensors on the lead fish 4 from sun exposure and human damage, ensuring the safety of the sensors. Traditional cableways do not have protective chambers, and after the lead fish 4 returns to the starting point for operation monitoring, the sensors need to be removed manually, which is troublesome and labor-intensive.

[0021] With the help of computer monitoring software, the cableway's operating status can be monitored in real time, and faults can be detected and dealt with in a timely manner. Traditional cableways do not have computer software and rely entirely on manual monitoring, which is labor-intensive and prone to observation errors.

[0022] With the help of computer-based flow measurement software, relevant flow measurement data can be monitored and processed in real time, and relevant reports can be generated after the flow measurement is completed, which is highly automated; traditional cableways require manual recording of flow measurement data and calculation, which is time-consuming and labor-intensive. Then, the fixing cylinder 8 set on the upper side of the lead weight 4 is located on the outside of the connection between the vertical cable 206 and the lead weight 4. This can effectively prevent the possibility of aquatic plants and other substances getting tangled on the outside of the connection between the vertical cable 206 and the lead weight 4, so that the lead weight 4 can always maintain a good working condition.

[0023] The lead weight 4 is internally fixed with a cutting component 9, which can cut the aquatic plants wrapped around the vertical cable 206 and the outside of the fixed tube 8, reducing the possibility of branches accumulating on the outside of the vertical cable 206 and the fixed tube 8, so that the lead weight 4 can always maintain normal working condition. The cutting assembly 9 includes a cavity 11 inside the lead weight 4. A control plate 903 is slidably mounted inside the cavity 11. A fixed cylinder 908 is fixedly connected to the upper side of the control plate 903 via an adjusting rod 905. Figure 11 and Figure 12 As shown, the fixed cylinder 908, viewed from top to bottom, is composed of two conical cylinders and two cylindrical cylinders of different diameters. A cutting cylinder 901 is rotatably sleeved on the outside of the fixed cylinder 908. Multiple through holes 902 are circumferentially opened on the upper side of the cutting cylinder 901. Multiple fixed sleeves 913 are fixedly connected inside the cutting cylinder 901. Movable sleeves 915 are slidably connected to the fixed sleeves 913. A cutter 916 is fixedly connected to the upper side of the movable sleeve 915. The position and number of cutters 916 are opposite to the through holes 902. A rotating assembly is fixedly installed inside the fixed cylinder 908. The rotating assembly includes a control motor 10 fixedly installed within the cavity 11, multiple movable sleeves 915 jointly and fixedly connected to a connecting ring 914, a slider fixedly connected within the connecting ring 914, a fixed cylinder 908 with an annular groove 912, the slider and the annular groove 912 being slidably connected, an internal gear ring 909 fixedly connected within the cutting cylinder 901, an adjusting shaft 904 rotatably connected through the fixed cylinder 908, a rotating gear 910 fixedly connected to the upper side of the adjusting shaft 904, the rotating gear 910 meshing with the internal gear ring 909, an annular groove 911 on the outer side of the fixed cylinder 908, a rotating ring 917 slidably sleeved within the annular groove 911, and the rotating ring 917 being fixedly connected to the cutting cylinder 901. A control shaft 13 is fixedly connected to the output end of the control motor 10. Two control gears 14 are fixedly sleeved on the outer side of the control shaft 13. Two control racks 17 are slidably connected inside the cavity 11, and the two control racks 17 are meshed with the control gears 14. A cam 15 is fixedly connected to the outer side of the control shaft 13. Two slide rods 16 are symmetrically slidably connected to the outer side of the cam 15. The two slide rods 16 are fixedly connected to the control plate 903. A telescopic rod 18 is fixedly connected to the upper side of each of the two control racks 17. A horizontal crossbar is fixedly connected to the upper side of the telescopic rod 18. The rack 22, the transverse rack 22 and the control plate 903 are slidably connected. One of the transverse racks 22 is fixedly connected to the side wall of the control rack 907. The control shaft 904 is fixedly connected to the lower side of the control gear 906. The control gear 906 and the control rack 907 mesh with each other. The control shaft 904 is located on the upper side of the control plate 903 and is rotatably connected to the control plate 903. Two fixed rods 12 are fixedly connected in the cavity 11. The two fixed rods 12 slide through the control rack 17 to determine and limit the movement trajectory of the control rack 17. During the testing process, the vertical motor 210 is started, which drives the vertical circular plate 209 to rotate. This, in turn, moves the lead weight 4 up and down via the vertical cable 206, adjusting its position for testing. During this process, the vertical motor 210 operates intermittently, causing the vertical circular plate 209 to rotate intermittently. The vertical circular plate 209, via the vertical cable 206, moves the lead weight 4 up and down intermittently. When the lead weight 4 is stationary, the control motor 10 is started, which drives the control shaft. When the control shaft 13 rotates, the cam 15 rotates. The cam 15 drives the control plate 903 to move up and down through the slide rod 16. The control plate 903 drives the fixed cylinder 908 to move up and down through the adjustment shaft 904 and the adjustment rod 905. The fixed cylinder 908 drives the cutting cylinder 901 to move up and down. The cutting cylinder 901 will clear the aquatic plants or branches that may be wrapped around the outside of the vertical cable 206. In this process, under the action of the cutter 916, the aquatic plants will be cut off, further reducing the possibility of aquatic plants being wrapped around the outside of the vertical cable 206. At the same time, the control shaft 13 will also drive the control gear 14 to rotate, and the control gear 14 will drive the control rack 17 to move, so as to Figure 8Taking the perspective of [unclear context] as an example, when the control gear 14 rotates clockwise, it will drive the lower control rack 17 to move to the left and the upper control rack 17 to move to the right. The control rack 17 drives the horizontal rack 22 to move via the telescopic rod 18. The horizontal rack 22 drives the adjusting rack 907 to move. The adjusting rack 907 drives the adjusting gear 906 to rotate. The adjusting gear 906 drives the adjusting shaft 904 to rotate. The adjusting shaft 904 drives the rotating gear 910 to rotate. The rotating gear 910 drives the inner gear ring 909 to rotate. The toothed ring 909 drives the cutting cylinder 901 to rotate, and the cutting cylinder 901 drives the cutter 916 to rotate, which can further improve the cutting effect of the cutter 916. In this process, when the cutting cylinder 901 rotates, under the action of the annular inclined groove 912 and the slider, it will drive the connecting ring 914, which is fixedly connected to the slider, to move up and down. The connecting ring 914 drives the moving sleeve 915 to move up and down, and the moving sleeve 915 drives the cutter 916 to move up and down, which can make the cutter 916 better cut the aquatic plants.

[0024] The lead weight 4 is internally equipped with a flushing component that can emit high-pressure water jets to flush away aquatic plants and branches on the outside of the fixed cylinder 8 and the vertical cable 206, keeping the lead weight 4 and the vertical cable 206 in good working condition. The flushing assembly includes a pump body fixedly installed in the cavity 11. A movable water pipe 27 is fixedly connected to the side wall of the pump body. Two square rods 23 are symmetrically fixedly connected to the upper side of the control plate 903. A fixed frame 25 is fixedly connected to the upper side of the two square rods 23. Two positioning shafts 29 are symmetrically fixedly connected inside the fixed frame 25. The positioning shafts 29 and the movable water pipe 27 are slidably connected. A spring 30 is fixedly connected between the movable water pipe 27 and the fixed frame 25. Two fixed shafts 19 are rotatably connected to the upper side of the control plate 903. Two guide gears 20 are fixedly sleeved on the outer side of each of the two fixed shafts 19. One of the guide gears 20 is meshed with a transverse rack 22. A vertical rack 21 is slidably connected to the upper side of the control plate 903. The other guide gear 20 is meshed with the vertical rack 21. A movable plate 24 is fixedly connected to the upper side of the vertical rack 21. Two clamping rods 31 are fixedly connected to the side wall of the movable plate 24. The two clamping rods 31 are located outside the movable water pipe 27 and abut against the movable water pipe 27. First, the water inlet of the pump body is directly exposed in the water area where the lead fish 4 is located, and a filter screen is fixedly installed at the water inlet. During the cleaning process of the fixed cylinder 8, the lead fish 4 and the vertical cable 206, the pump body is started, and the pump body absorbs the nearby water. The clean water is sprayed to the outside of the fixed cylinder 8 or the vertical cable 206 through the moving water pipe 27 and the nozzle 28. In this process, since the moving water pipe 27 and the nozzle 28 on both sides are symmetrically set, the lead fish 4 body will not be shifted, which will affect the normal detection of the lead fish 4. In addition, the nozzle 28 and the cutter 916 are not in the same position. The collaborative mode of "first mechanical scraping and then high-pressure water flow" can efficiently cut and remove the branches, water plants and other debris wrapped around the connection between the lead fish 4 and the vertical cable 206. At the same time, the debris is flushed away to the downstream of the flow measurement area through directional water flow, eliminating secondary pollution and secondary entanglement. The obstacle removal efficiency is more than 60% higher than that of the traditional fixed grid. Secondly, during the movement of the horizontal rack 22, the horizontal rack 22 drives the guide gear 20 to rotate, the guide gear 20 drives the fixed shaft 19 to rotate, the fixed shaft 19 drives another guide gear 20 to rotate, the guide gear 20 drives the meshing vertical rack 21 to move, the vertical rack 21 drives the moving plate 24 to move, the moving plate 24 drives the clamping rod 31 to move, the clamping rod 31 and the moving water pipe 27 abut against each other, thereby driving the moving water pipe 27 to move. Adjusting the position of the moving water pipe 27 spraying towards the fixed cylinder 8 or the vertical cable 206 can better form the flushing of the aquatic plants or branches on the outside of the fixed cylinder 8 or the vertical cable 206, reducing the possibility of aquatic plants or branches getting tangled on the outside of the vertical cable 206.

[0025] Multiple round rods 26 are evenly fixedly connected to the side wall of the movable plate 24. Both ends of the multiple round rods 26 are tapered. During the movement of the movable plate 24, the movable plate 24 drives the round rods 26 to move. The round rods 26 can abut against the larger tree branches located outside the lead fish 4, preventing the larger tree branches from abutting against the lead fish 4 and affecting the normal operation of the lead fish 4.

[0026] A method for automatically controlling the position of a river current measuring lead weight includes the following steps: S1. Start the horizontal motor 204. The horizontal motor 204 drives the positioning frame 208 and the moving table 201 to move as a whole through the horizontal cable 205, which in turn drives the vertical cable 206 and the lead weight 4 to move as a whole until the lead weight 4 moves to the working position. S2. Start the vertical motor 210, which drives the vertical circular plate 209 to rotate. The vertical circular plate 209 drives the lead weight 4 to move downward through the vertical cable 206, so that the lead weight 4 is moved to the working position. Start the monitoring component 7 to perform detection. S3. After the test is completed, the lead fish 4 is removed from the test water area again by the vertical motor 210 and the horizontal motor 204. S4. If the fixed limiter 203 or the lead weight limiter 5 malfunctions during the testing process, the position of the lead weight 4 should be adjusted in a timely manner using the horizontal motor 204 and the vertical motor 210, and testing and adjustment should be carried out promptly.

[0027] In this invention, when a detection operation is required, the specific operation is as follows: First, start the horizontal motor 204. The horizontal motor 204 drives the positioning frame 208 and the moving stage 201 to move as a whole through the horizontal cable 205 until the moving stage moves to the appropriate detection position. Then, start the vertical motor 210. The vertical motor 210 drives the vertical circular plate 209 to rotate. The vertical circular plate 209 drives the lead weight 4 to move downward through the vertical cable 206. Then, start the monitoring component 7 to begin the detection. When the lead weight 4 is stationary, the control motor 10 is started. The control motor 10 drives the control shaft 13 and cam 15 to rotate. The cam 15 drives the control plate 903 to move up and down through the slide rod 16. The control plate 903 drives the fixed cylinder 908 and the cutting cylinder 901 to move up and down through the adjustment shaft 904 and the adjustment rod 905. The cutting cylinder 901 will clear any water plants or branches that may be tangled on the outside of the vertical cable 206. At the same time, the control shaft 13 drives the control gear 14 to rotate, the control gear 14 drives the control rack 17 to move, the control rack 17 drives the transverse rack 22 to move through the telescopic rod 18, the transverse rack 22 drives the adjustment rack 907 to move, the adjustment rack 907 drives the adjustment gear 906, the adjustment shaft 904, and the rotating gear 910 to rotate, the rotating gear 910 drives the inner gear ring 909, the cutting cylinder 901, and the cutter 916 to rotate, and when the cutting cylinder 901 rotates, under the action of the annular inclined groove 912 and the slider, it will drive the connecting ring 914 to move up and down, the connecting ring 914 drives the moving sleeve 915 and the cutter 916 to move up and down, so that the cutter 916 can better cut the aquatic plants; During the cleaning process of the fixed cylinder 8, lead weight 4 and vertical cable 206, the pump body is started. The pump body absorbs the nearby water, and the clean water is sprayed to the outside of the fixed cylinder 8 or vertical cable 206 through the moving water pipe 27 and the nozzle 28. The nozzle 28 and the cutter 916 are not in the same position. The coordinated mode of "first mechanical scraping and then high-pressure water jet" can efficiently cut and remove the branches, water plants and other debris wrapped around the connection between the lead weight 4 and the vertical cable 206, and prevent secondary pollution and secondary entanglement. During the movement of the horizontal rack 22, the horizontal rack 22 drives the guide gear 20, the fixed shaft 19, and another guide gear 20 to rotate. The guide gear 20 drives the vertical rack 21, the moving plate 24, and the clamping rod 31 to move. The clamping rod 31 abuts against the moving water pipe 27, thereby driving the moving water pipe 27 to move. Adjusting the position of the moving water pipe 27 spraying towards the fixed cylinder 8 or the vertical cable 206 can better form a flushing effect on the aquatic plants or branches outside the fixed cylinder 8 or the vertical cable 206, reducing the possibility of aquatic plants or branches getting tangled on the outside of the vertical cable 206.

Claims

1. An automatic control device for the position of a lead weight in river flow measurement, comprising a lead weight (4), a lead weight platform (3), and a support platform (1), wherein the lead weight platform (3) is fixedly equipped with a lead weight limiter (5), the lead weight (4) is fixedly equipped with a counterweight (6), the lead weight (4) is fixedly equipped with a monitoring component (7), the lead weight (4) is fixedly equipped with a vertical cable (206), and the support platform (1) is fixedly connected to a control component (2), characterized in that, The lead fish (4) is fixedly installed with a fixing cylinder (8), and the lead fish (4) is fixedly installed with a cutting component (9). The cutting component (9) can cut the aquatic plants wrapped around the vertical cable (206) and the outside of the fixing tube (8), so that the lead fish (4) can always maintain normal working condition; The cutting assembly (9) includes a cavity (11) inside the lead weight (4). A control plate (903) is slidably installed in the cavity (11). The control plate (903) is fixedly connected to a fixed cylinder (908) via an adjustment rod (905). The fixed cylinder (908) is rotatably sleeved with a cutting cylinder (901). The cutting cylinder (901) has multiple through holes (902). The cutting cylinder (901) is fixedly connected to multiple fixed sleeves (913). The fixed sleeves (913) are slidably connected to a movable sleeve (915). The movable sleeve (915) is fixedly connected to a cutter (916). A rotating assembly is fixedly installed inside the fixed cylinder (908).

2. The automatic control device for the position of a river current measuring lead weight according to claim 1, characterized in that, The rotating assembly includes a control motor (10) fixedly installed in the cavity (11), a connecting ring (914) fixedly connected to the moving sleeve (915), a slider fixedly connected to the connecting ring (914), an annular groove (912) on the fixed cylinder (908), the slider and the annular groove (912) being slidably connected, an internal gear ring (909) fixedly connected to the cutting cylinder (901), an adjusting shaft (904) rotatably connected to the fixed cylinder (908), a rotating gear (910) fixedly connected to the adjusting shaft (904), the rotating gear (910) meshing with the internal gear ring (909), a control shaft (13) fixedly connected to the output end of the control motor (10), and two control gears (14) fixedly sleeved on the control shaft (13). 4) The cavity (11) is slidably connected to two control racks (17), the control racks (17) and control gears (14) are meshed, the control shaft (13) is fixedly connected to a cam (15), the cam (15) is symmetrically slidably connected to two slide rods (16), the two slide rods (16) are fixedly connected to the control plate (903), the control racks (17) are fixedly connected to a telescopic rod (18), the telescopic rod (18) is fixedly connected to a transverse rack (22), the transverse rack (22) and control plate (903) are slidably connected, the transverse rack (22) is fixedly connected to an adjustment rack (907), the adjustment shaft (904) is fixedly connected to an adjustment gear (906), the adjustment gear (906) and the adjustment rack (907) mesh.

3. The automatic control device for the position of a river current measuring lead weight according to claim 2, characterized in that, The lead fish (4) is fixedly equipped with a flushing component, which can emit high-pressure water flow to flush the weeds and branches on the outside of the fixed cylinder (8) and the vertical cable (206), so that the lead fish (4) and the vertical cable (206) can maintain good working condition.

4. The automatic control device for the position of a river current measuring lead weight according to claim 3, characterized in that, The flushing assembly includes a pump body fixedly installed in a cavity (11), the pump body being fixedly connected to a movable water pipe (27), the control board (903) being symmetrically fixedly connected to two square rods (23), the square rods (23) being fixedly connected to a fixed frame (25), the fixed frame (25) being symmetrically fixedly connected to two positioning shafts (29), the positioning shafts (29) being slidably connected to the movable water pipe (27), and a spring (30) being fixedly connected between the movable water pipe (27) and the fixed frame (25).

5. The automatic control device for the position of a river current measuring lead weight according to claim 4, characterized in that, The control board (903) is rotatably connected to two fixed shafts (19), and the fixed shafts (19) are fixedly sleeved with two guide gears (20). One of the guide gears (20) is meshed with a horizontal rack (22), and the control board (903) is slidably connected with a vertical rack (21). The other guide gear (20) is meshed with a vertical rack (21), and the vertical rack (21) is fixedly connected with a moving plate (24). The moving plate (24) is fixedly connected with two clamping rods (31).

6. The automatic control device for the position of a river current measuring lead weight according to claim 5, characterized in that, The movable plate (24) has multiple round rods (26) evenly fixedly connected to its side wall, and both ends of the multiple round rods (26) are tapered.

7. The automatic control device for the position of a river current measuring lead weight according to claim 6, characterized in that, The fixed cylinder (908) has an annular groove (911) on its outer side, and a rotating ring (917) is slidably sleeved in the annular groove (911). The rotating ring (917) and the cutting cylinder (901) are fixedly connected.

8. The automatic control device for the position of a river current measuring lead weight according to claim 7, characterized in that, Two fixed rods (12) are fixedly connected inside the cavity (11), and the two fixed rods (12) slide through the control rack (17).

9. The automatic control device for the position of a river current measuring lead weight according to claim 8, characterized in that, The control component (2) includes fixed limiters (203) fixedly installed on the support platform (1). A fixed rail (202) is fixedly connected between the two fixed limiters (203). A movable platform (201) is slidably installed on the fixed rail (202). Two transverse circular plates (207) are rotatably installed inside the movable platform (201). The transverse circular plates (207) and the fixed rail (202) are arranged opposite to each other. A positioning frame (208) is fixedly connected to the movable platform (201). The positioning frame (208) is fixedly connected to a vertical motor (210), and a vertical circular plate (209) is fixedly connected to the outside of the output shaft of the vertical motor (210). The vertical cable (206) and the vertical circular plate (209) are wound together. A horizontal motor (204) is fixedly connected to the upper side of one of the support platforms (1). A horizontal cable (205) is wound around the outside of the output shaft of the horizontal motor (204). The horizontal cable (205) and the positioning frame (208) are fixedly connected.

10. A method for automatically controlling the position of a river current measuring lead weight according to claim 9, characterized in that, Includes the following steps: S1. Start the horizontal motor (204). The horizontal motor (204) drives the positioning frame (208) and the moving table (201) to move as a whole through the horizontal cable (205), which in turn drives the vertical cable (206) and the lead weight (4) to move as a whole until the lead weight (4) moves to the working position. S2. Start the vertical motor (210) to drive the vertical circular plate (209) to rotate. The vertical circular plate (209) drives the lead fish (4) to move downward through the vertical cable (206) so that the lead fish (4) is moved to the working position. Start the monitoring component (7) to perform detection. S3. After the test is completed, the lead fish (4) is removed from the test water area again by the vertical motor (210) and the horizontal motor (204); S4. If the fixed limiter (203) or the lead fish limiter (5) malfunctions during the testing process, the position of the lead fish (4) should be adjusted in a timely manner by using the horizontal motor (204) and the vertical motor (210) to conduct timely testing and adjustment.

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