A water level and flow velocity detection device for water conservancy projects

Abstract

The invention discloses a water level and flow rate detection device for a water conservancy project, which belongs to the field of water conservancy project detection and comprises a mounting rod; a rotating rod is arranged on the mounting rod, a T-shaped three-way pipe is installed at the bottom end of the rotating rod, a guide pipe is installed on the first joint and the second joint of the three-way pipe, and the third joint of the three-way pipe is connected to the rotating rod; the scheme is provided with a slider, a guide groove and an elastic member; in the process of the sleeve moving along the guide pipe, the sleeve will rotate under the guiding action of the spiral guide groove; in the process of the sleeve rotating, the bottom end of the filter screen can be gradually rotated to the top end, at the same time, impurities attached to the surface of the filter screen rotate with the filter screen, and are pushed by the water flow and clamped in the suspended state below the raised part of the filter screen. After the part rotates, the suspended impurities will move to the top of the raised part, which is convenient for the water flow to impact and remove the part of the impurities, thereby improving the automatic cleaning effect of the filter screen.

Description

Technical Field

[0001] The invention relates to the field of water conservancy project detection, and more specifically to a water level and flow velocity detection device for water conservancy projects. Background Art

[0002] Water conservancy projects are a general term for various engineering projects built to control, utilize and protect surface and underground water resources and the environment. They include flood control projects to prevent flood disasters; farmland water conservancy projects to prevent drought, waterlogging and waterlogging to serve agricultural production; and hydropower generation projects that convert water energy into electrical energy.

[0003] Generally speaking, suspended impurities in rivers mainly come from natural processes such as soil erosion, rock weathering, and plant and animal remains in the basin, as well as a small amount of waste generated by human activities. In the absence of major natural disasters such as landslides and mud-rock flows that cause a large amount of new matter to flow into the river, or when the surrounding land use types and the intensity of human activities have not changed significantly, that is, under normal circumstances, the sources are relatively stable, so the types of impurities are also relatively fixed.

[0004] When the impeller flowmeter is actually used to detect the flow rate of river water, impurities in the water are very easy to adhere to and entangle on the impeller surface of the impeller flowmeter. Once this happens, the impeller flowmeter will not be able to operate normally, and ultimately there will be a large error between the measured data and the actual value.

[0005] Therefore, a water level and flow velocity detection device for water conservancy projects is proposed. Summary of the invention

[0006] In view of the problems existing in the prior art, the object of the present invention is to provide a water level and flow velocity detection device for water conservancy projects, which can reduce the influence of water debris on the impeller flowmeter.

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A water level and flow velocity detection device for a hydraulic project, comprising a mounting rod;

[0009] A rotating rod is provided on the mounting rod, a T-shaped tee is installed at the bottom end of the rotating rod, a flow guide tube is installed on the first joint and the second joint of the tee, and the third joint of the tee is connected to the rotating rod, the connecting line of the first joint and the second joint of the tee is perpendicular to the rotating rod, and each flow guide tube is provided with an impeller flow meter;

[0010] A servo motor is detachably mounted on the mounting rod, and the servo motor is used to drive the rotating rod to rotate;

[0011] Each flow guide tube is provided with a sleeve with two ends opened. A filter screen is fixedly installed at one end of the sleeve away from the impeller flow meter. The filter screen is arc-shaped, and the raised part of the filter screen is located outside the flow guide tube. The filter screen is used to block impurities in the water. A trigger mechanism for triggering the servo motor is provided on the flow guide tube.

[0012] A distance measuring module is arranged on the mounting rod, and the distance measuring module is used to measure the water surface height. A communication module is arranged on the mounting rod, and the communication module is used to send data detected by the distance measuring module and the impeller flow meter.

[0013] Furthermore, the trigger mechanism includes an elastic member fixedly mounted on the inner wall of the guide tube, the elastic member is used to push the sleeve out of the guide tube, and a switch electrically connected to the servo motor is fixedly mounted on the inner wall of the guide tube, the switch is used to control the operation of the servo motor.

[0014] Furthermore, the sleeve is rotatably inserted in the guide tube, a guide groove is obliquely opened on the inner wall of the guide tube, a transverse groove is opened at one end of the guide groove close to the impeller flowmeter, a slider is slidably installed in the guide groove, the slider is slidably matched with the transverse groove, and the slider is fixedly connected to the sleeve.

[0015] Furthermore, a partition is rotatably installed in the third joint of the three-way pipe, an elastic airbag is fixedly installed on the top wall of the partition, an intake valve and an exhaust valve are embedded on the side wall of the elastic airbag, the output end of the exhaust valve extends to the bottom wall of the partition, an air pipe is inserted on the side wall of the third joint of the three-way pipe, the air pipe is connected to the third joint of the three-way pipe, the top of the air pipe extends to the side wall of the mounting rod, and an extrusion mechanism for extruding the elastic airbag is provided in the three-way pipe.

[0016] Furthermore, the extrusion mechanism includes a mounting plate vertically fixedly installed in the third joint of the three-way pipe, and a reciprocating screw is vertically fixedly installed on the bottom wall of the mounting plate; a pressure plate is threadedly installed on the reciprocating screw, and the pressure plate is used to squeeze the elastic airbag downward; and an anti-rotation mechanism cooperating with the pressure plate is provided on the three-way pipe.

[0017] Furthermore, the anti-rotation mechanism includes a water baffle plate vertically rotatably mounted on the bottom wall of the tee pipe, the longitudinal section of the water baffle plate is an isosceles trapezoid, the surface area of ​​the top wall of the water baffle plate is larger than the surface area of ​​the bottom wall, and a connecting rod is fixedly mounted on one end of the top wall of the water baffle plate, and the top end of the connecting rod extends into the tee pipe;

[0018] A guide rod is vertically fixedly installed at the position of the connecting rod located in the three-way pipe. The guide rod passes through the pressing plate, and the guide rod and the pressing plate are slidably matched.

[0019] Furthermore, an arc groove is provided on the pressing plate, and the guide rod passes through the arc groove.

[0020] Furthermore, the top end of the three-way pipe is fixedly connected to the center of the partition.

[0021] Furthermore, a control module, a counting module, a storage module, a calculation module, and a comparison module are provided on the mounting rod; and the rotating rod is an electric telescopic rod;

[0022] The control module is used to control the operation of the electric telescopic rod.

[0023] The counting module is used to record the number of times the servo motor works when the electric telescopic rod is in a specified extension state, and send specific data of the number of times the servo motor works and specific data of the extension amount of the electric telescopic rod to the storage module;

[0024] The calculation module is used to calculate the frequency of the filter being blocked when the output end of the electric telescopic rod is in each extension state, and send the calculation result to the storage module;

[0025] The comparison module is used to compare the frequency of filter blockage when the electric telescopic rod is in different extension states.

[0026] Furthermore, the calculation module calculates the data:

[0027]

[0028] Where f is the frequency at which the filter is blocked;

[0029] T is the specified time interval, which is the preset value;

[0030] X is the number of times the filter is blocked when the electric telescopic rod is at a certain extension amount.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] (1) The filter screen prevents impurities from directly adhering to the surface of the impeller flowmeter, ensuring that the impeller can rotate normally and improving the detection accuracy. When a large amount of impurities adhere to the surface of the filter screen, resulting in a large difference between the water flow velocity in the diversion pipe and the water flow velocity in the river channel, the servo motor is controlled to rotate through the trigger mechanism. At this time, the direction of the tee pipe is turned, and the water flow passing through the tee pipe impacts the filter screen, thereby cleaning the impurities attached to the outer wall of the filter screen, ensuring that the water flow can normally enter the diversion pipe to trigger the impeller flowmeter to work, thereby improving the detection accuracy.

[0033] (2) As the sleeve moves along the guide tube, it rotates under the guidance of the spiral guide groove. As the sleeve rotates, the bottom end of the filter screen can gradually rotate to the top end. At the same time, impurities attached to the surface of the filter screen rotate with the filter screen, and are pushed by the water flow and clamped by the suspended impurities under the raised part of the filter screen. After the part rotates, the suspended impurities will move to the top of the raised part, making it easier for the water flow to impact and remove the impurities, thereby improving the automatic cleaning effect of the filter screen.

[0034] (3) Under the action of the squeezing mechanism, the elastic airbag is intermittently squeezed, and the gas in the elastic airbag is discharged into the space below the partition in the three-way pipe through the exhaust valve, and then flows outward through the corresponding filter. In the process of the airflow passing through the filter, the airflow impacts the impurities attached to the surface of the filter, so that the impurities can be separated from the filter, thereby improving the cleaning effect of the filter; after the airflow passes through the filter, the bubbles float up, and the floating bubbles provide buoyancy to the impurities above the filter, which can quickly move the impurities away from the filter, thereby preventing the impurities from falling onto the filter surface again. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a front structural schematic diagram of the present invention;

[0036] Figure 2 It is a schematic diagram of the back structure of the present invention;

[0037] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0038] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0039] Figure 5 It is a schematic diagram of the combined structure of the pressing plate and the guide rod of the present invention;

[0040] Figure 6 It is a schematic diagram of the combined structure of the guide groove, the transverse groove, the sliding block and the guide pipe of the present invention;

[0041] Figure 7 It is a schematic diagram of the combined structure of the sleeve and the slider of the present invention;

[0042] Figure 8 The flowchart of the control module, counting module, storage module, calculation module and comparison module of the present invention;

[0043] Fig. 9 The figure is a working flow chart of the distance measurement module and the communication module of the present invention.

[0044] Description of the numbers in the figure:

[0045] 1. Mounting rod; 2. Rotating rod; 3. Tee pipe; 4. Guide pipe; 5. Impeller flowmeter; 6. Servo motor; 7. Sleeve; 8. Filter; 9. Distance measurement module; 10. Communication module; 11. Elastic part; 12. Switch; 13. Guide groove; 14. Horizontal groove; 15. Slider; 16. Partition; 17. Elastic airbag; 18. Inlet valve; 19. Exhaust valve; 20. Air pipe; 21. Reciprocating screw; 22. Pressure plate; 23. Connecting rod; 24. Water retaining plate; 25. Guide rod; 26. Control module; 27. Counting module; 28. Storage module; 29. ​​Calculation module; 30. Comparison module; 31. Mounting plate; 32. Arc groove. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention. Embodiment 1:

[0047] See also Figures 1 to 9 , a water level and flow velocity detection device for water conservancy projects, comprising a mounting rod 1;

[0048] A rotating rod 2 is provided on the mounting rod 1, a T-shaped tee 3 is installed at the bottom end of the rotating rod 2, a flow guide pipe 4 is installed on the first joint and the second joint of the tee 3, and the third joint of the tee 3 is connected to the rotating rod 2, the connecting line between the first joint and the second joint of the tee 3 is perpendicular to the rotating rod 2, and each flow guide pipe 4 is provided with an impeller flowmeter 5;

[0049] A servo motor 6 is detachably mounted on the mounting rod 1, and the servo motor 6 is used to drive the rotating rod 2 to rotate, and the output end of the servo motor 6 is fixedly connected to the rotating rod 2;

[0050] Each guide tube 4 is provided with a sleeve 7 with openings at both ends, and a filter screen 8 is fixedly installed at one end of the sleeve 7 away from the impeller flow meter 5. The filter screen 8 is arc-shaped, and the convex part of the filter screen 8 is located outside the guide tube 4. The filter screen 8 is used to block impurities in the water, and a trigger mechanism for triggering the servo motor 6 to work is provided on the guide tube 4;

[0051] A distance measuring module 9 is provided on the mounting rod 1, and the distance measuring module 9 is used to measure the water surface height.

[0052] Among them, the distance measurement module 9 is an ultrasonic distance sensor module, which is mainly composed of an ultrasonic transmitter, an ultrasonic receiver and a control circuit. These components work together to achieve the function of distance measurement. It is a prior art and will not be described in detail.

[0053] A communication module 10 is provided on the mounting rod 1, and the communication module 10 is used to send data detected by the ranging module 9 and the impeller flowmeter 5; the communication module 10 can adopt any one of a 4G / 5G module and a LoRa module, wherein the 4G / 5G module and the LoRa module are both existing technologies and will not be described in detail.

[0054] Among them, the working principle of the impeller flowmeter 5 is to place the impeller in the measured fluid, rotate it due to the impact of the fluid flow, and reflect the size of the flow rate by the speed of the impeller rotation. This is the existing technology and will not be repeated; controlling the output end of the servo motor 6 to rotate a specified angle through a program is also the existing technology and will not be repeated.

[0055] The trigger mechanism includes an elastic member 11 fixedly mounted on the inner wall of the guide tube 4, the elastic member 11 is used to push the sleeve 7 out of the guide tube 4, and a switch 12 electrically connected to the servo motor 6 is fixedly mounted on the inner wall of the guide tube 4, and the switch 12 is used to control the operation of the servo motor 6.

[0056] First, the mounting rod 1 is installed beside the river channel, so that the three-way pipe 3 is submerged in the water, and one of the guide pipes 4 is facing the direction of the water flow, so that the water flow will pass through the filter screen 8 on the guide pipe 4 and enter the guide pipe 4. At this time, the water flow in the guide pipe 4 impacts the impeller flowmeter 5 in the guide pipe 4, so that the water flow speed can be detected; because the mounting rod 1 is installed beside the river channel, the distance between the distance measuring module 9 and the riverbed can be manually measured, and then the water level height can be detected through the distance measuring module 9 on the bottom wall of the mounting rod 1;

[0057]

[0058] Where h is the water level height,

[0059] H is the distance between the distance measuring module 9 and the riverbed, which is a preset value;

[0060] h 0 The distance between the water surface detected by the distance measuring module 9 and the distance measuring module 9;

[0061] Then the impeller flow meter 5 and the distance measurement module 9 send the detected results to the communication module 10, and the water flow status information is sent to the supervisor through the communication module 10;

[0062] When the volume of impurities in contact with the filter 8 is small, the impurities cannot be stuck in the filter 8. At this time, the impurities will move along the surface of the arc-shaped filter 8 under the action of the impact force of the water flow until they are out of contact with the filter 8. At this time, the water flow impact force on the filter 8 is less than the elastic force of the elastic member 11, so the elastic member 11 is in a normal extension state and the sleeve 7 is not in contact with the switch 12; when larger impurities in the water impact the surface of the filter 8 and adhere to the surface of the filter 8, the holes on the surface of the filter 8 are blocked by the impurities. At this time, the water flow impact force on the impurities attached to the surface of the filter 8 will also be transmitted to the filter 8, so the water flow impact force on the filter 8 is larger. At this time, the sleeve 7 will move along the guide tube 4 and squeeze the elastic member 11, and then squeeze the switch 12, thereby being able to control the servo motor 6 to work.

[0063] When the servo motor 6 is working, the servo motor 6 rotates forward 180 degrees and then the power is cut off. In the process of the servo motor 6 driving the three-way pipe 3 to rotate through the rotating rod 2, the resistance encountered by the impurities attached to the surface of the filter 8 gradually decreases and slides along the surface of the filter 8, thereby improving the cleaning effect of the impurities on the surface of the filter 8.

[0064] When the filter screen 8 with impurities attached to the surface rotates 180 degrees, the water flowing in the three-way pipe 3 passes through the inner wall of the filter screen 8 and flows outward, and in this process, the cleaning effect of the filter screen 8 is further improved; and an impeller flowmeter 5 is arranged in each guide pipe 4, which can normally detect the water flow velocity every time the three-way pipe 3 rotates 180 degrees, ensuring timely detection and improving safety.

[0065] When the filter screen 8 facing the water flow direction is attached with impurities again, the servo motor 6 drives the three-way pipe 3 to reverse 180 degrees to clean the filter screen 8 with impurities attached; this process repeats itself, and whenever large impurities are attached to the surface of the filter screen 8 facing the water flow, the servo motor 6 drives the three-way pipe 3 to intermittently rotate forward and reverse, thereby cleaning the impurities on the surface of the filter screen 8, ensuring that the water flow can normally enter the guide pipe 4 to trigger the impeller flowmeter 5 to work, thereby improving the detection accuracy.

[0066] like Figure 3 , Figure 6 , Figure 7 As shown, the sleeve 7 is rotatably inserted in the guide tube 4, and a guide groove 13 is obliquely opened on the inner wall of the guide tube 4. The guide groove 13 is a spiral groove. A transverse groove 14 is opened at one end of the guide groove 13 close to the impeller flowmeter 5. A slider 15 is slidably installed in the guide groove 13. The slider 15 is slidably matched with the transverse groove 14, and the slider 15 is fixedly connected to the sleeve 7.

[0067] Since the slider 15 is slidably installed in the guide groove 13 and the transverse groove 14, during the movement of the sleeve 7 along the guide tube 4, under the guidance of the spiral guide groove 13, the sleeve 7 will rotate 180 degrees and then maintain this posture and continue to move into the guide tube 4 until the switch 12 is squeezed; since the sleeve 7 is only in contact with the elastic member 11, the sleeve 7 slides on the surface of the elastic member 11 during the rotation of the sleeve 7.

[0068] During the rotation of the sleeve 7, the bottom end of the filter 8 can gradually rotate to the top end. At the same time, the impurities attached to the surface of the filter 8 rotate with the filter 8, and are pushed by the water flow and clamped in the suspended impurities under the raised part of the filter 8. After the part rotates 180 degrees, the suspended impurities will move to the top of the raised part, making it easier for the water flow to impact and remove these impurities, thereby improving the automatic cleaning effect of the filter 8.

[0069] like Figure 1 , Figure 4 As shown, a partition 16 is rotatably installed in the third joint of the tee pipe 3, and the partition 16 is used to separate the third joint of the tee pipe 3 from the tee pipe 3 to prevent the gas in the gas tee pipe 3 from flowing into the third joint of the tee pipe 3. An elastic airbag 17 is fixedly installed on the top wall of the partition 16, and an air inlet valve 18 and an exhaust valve 19 are embedded on the side wall of the elastic airbag 17. The output end of the exhaust valve 19 extends to the bottom wall of the partition 16, and an air pipe 20 is inserted on the side wall of the third joint of the tee pipe 3. The air pipe 20 is connected to the third joint of the tee pipe 3, and the top end of the air pipe 20 extends to the side wall of the mounting rod 1, so that the top end of the air pipe 20 is located above the water surface, and an extrusion mechanism for extruding the elastic airbag 17 is provided in the tee pipe 3.

[0070] During the rotation of the three-way pipe 3, under the action of the squeezing mechanism, the elastic airbag 17 is intermittently squeezed. When the elastic airbag 17 is squeezed, the gas in the elastic airbag 17 is discharged into the space below the partition 16 in the three-way pipe 3 through the exhaust valve 19, and the airflow flows along the first joint and the second joint of the three-way pipe 3 to the corresponding guide pipe 4, and then flows outward through the corresponding filter 8. In the process of the airflow passing through the filter 8, the airflow impacts the impurities attached to the surface of the filter 8, thereby enabling the impurities to break away from the filter 8, thereby improving the cleaning effect of the filter 8.

[0071] After the airflow passes through the filter 8, the bubbles float up, and the floating bubbles provide buoyancy to the impurities above the filter 8, which can quickly move the impurities away from the filter 8 and prevent the impurities from falling onto the surface of the filter 8 again.

[0072] When the squeezing mechanism stops squeezing the elastic airbag 17, the elastic airbag 17 recovers, and at this time the elastic airbag 17 inhales air from the outside through the air inlet valve 18 and the air pipe 20, thereby preparing for working again.

[0073] like Figure 4 As shown, the extrusion mechanism includes a mounting plate 31 vertically fixedly installed in the third joint of the three-way pipe 3, and a reciprocating screw 21 is vertically fixedly installed on the bottom wall of the mounting plate 31, so that the reciprocating screw 21 rotates synchronously when the servo motor 6 drives the three-way pipe 3 to rotate; a pressure plate 22 is threadedly installed on the reciprocating screw 21, and the pressure plate 22 is used to squeeze the elastic airbag 17 downward; and an anti-rotation mechanism cooperating with the pressure plate 22 is provided on the three-way pipe 3.

[0074] The anti-rotation mechanism includes a water baffle 24 vertically rotatably mounted on the bottom wall of the tee pipe 3. The longitudinal section of the water baffle 24 is an isosceles trapezoid, and the surface area of ​​the top wall of the water baffle 24 is larger than the surface area of ​​the bottom wall. Therefore, when impurities are impacted by the water flow to the side wall of the water baffle 24, the impurities will slide downward along the side wall of the water baffle 24 and eventually break away from the contact with the water baffle 24; and a connecting rod 23 is fixedly mounted on one end of the top wall of the water baffle 24, and the top end of the connecting rod 23 extends into the tee pipe 3. During installation, the side wall of the water baffle 24 is parallel to the connecting line of the first joint and the second joint of the tee pipe 3, and then the pressing plate 22 is installed on the reciprocating screw rod 21, and when the tee pipe 3 is placed in water, the side wall of the water baffle 24 is parallel to the direction of the water flow. Therefore, when the water flow impacts the water baffle 24, the water baffle 24 always maintains this state; therefore, during the rotation of the tee pipe 3, the tee pipe 3 will rotate around the connecting rod 23, and the connecting rod 23 remains relatively stationary.

[0075] A guide rod 25 is fixedly installed at the position of the connecting rod 23 located in the tee pipe 3. The guide rod 25 passes through the pressure plate 22, and the guide rod 25 and the pressure plate 22 are slidably matched; therefore, the position of the pressure plate 22 can be limited by the guide rod 25 to prevent the pressure plate 22 from rotating, thereby ensuring that the reciprocating screw 21 can drive the pressure plate 22 to move up and down.

[0076] During the rotation of the three-way pipe 3, the reciprocating screw 21 is driven to rotate. At this time, the guide rod 25 in a relatively static state can limit the rotation of the pressure plate 22. Therefore, the pressure plate 22 only moves back and forth along the reciprocating screw 21, thereby achieving the effect of intermittently squeezing the elastic airbag 17.

[0077] Since the reciprocating screw 21 is driven by the three-way pipe 3 , when the three-way pipe 3 is in a stationary state, the elastic airbag 17 cannot be squeezed, thereby improving the detection accuracy of the impeller flowmeter 5 .

[0078] like Figure 5 As shown, an arc-shaped groove 32 is formed on the pressing plate 22 , and the guide rod 25 passes through the arc-shaped groove 32 .

[0079] Under the action of the arc groove 32, the guide rod 25 can move in the arc groove 32; since the length of the arc groove 32 is limited, in the process of the reciprocating screw 21 driving the pressure plate 22 to move, the pressure plate 22 first rotates with the reciprocating screw 21. When the side wall of the arc groove 32 conflicts with the guide rod 25, the pressure plate 22 will be unable to rotate. At this time, the pressure plate 22 can only move up and down along the guide rod 25, thereby ensuring that the pressure plate 22 can make up and down reciprocating motion on the reciprocating screw 21.

[0080] Since the water flow will shake during the flow, the shaking water flow will impact the water baffle 24, causing the water baffle 24 to have a tendency to shake. Therefore, under the action of the arc groove 32 and the rotatably mounted partition 16, it is ensured that the water baffle 24 can shake slightly.

[0081] Since some impurities will adhere to the connection between the partition 16 and the tee pipe 3, the connection between the connecting rod 23 and the tee pipe 3, and the connection between the water baffle 24 and the tee pipe 3, the water baffle 24 and the tee pipe 3 can be rubbed and crushed by making the water baffle 24 frequently swing under the action of the water flow, thereby preventing the connection between the partition 16 and the tee pipe 3, the connection between the connecting rod 23 and the tee pipe 3, and the water baffle 24 and the tee pipe 3 from being stuck by impurities, resulting in the connection between the partition 16 and the tee pipe 3, the connection between the connecting rod 23 and the tee pipe 3, and the water baffle 24 and the tee pipe 3 being fixed together, that is, ensuring that the tee pipe 3 can rotate around the connecting rod 23 when it rotates, thereby ensuring that the pressure plate 22 can move normally.

[0082] like Figure 4 As shown, the top end of the three-way pipe 3 is fixedly connected to the center of the circular partition 16, so that the partition 16 can be prevented from rotating with the three-way pipe 3 during the rotation of the three-way pipe 3, so that the elastic airbag 17 remains stationary. Since the elastic airbag 17 is arranged between the pressure plate 22 and the partition 16, the elastic airbag 17 can be prevented from being worn during the process of the pressure plate 22 moving down to squeeze the elastic airbag 17, thereby playing a role in protecting the elastic airbag 17.

[0083] like Figure 1 , Figure 2 As shown, the mounting rod 1 is provided with a control module 26, a counting module 27, a storage module 28, a calculation module 29, and a comparison module 30; and the rotating rod 2 is an electric telescopic rod;

[0084] The control module 26 is used to control the operation of the electric telescopic rod. The control module 26 controls the electric telescopic rod to complete a telescopic process, and in the process of completing a telescopic process, the extension amount of the electric telescopic rod is adjusted once every T time interval, and the change amount of the extension amount of the electric telescopic rod each time is the same, and T is a preset value, and the change amount of the extension amount of the electric telescopic rod each time is the preset value;

[0085] When the control module 26 controls the electric telescopic rod to work: the counting module 27 is used to record the number of times the servo motor 6 works when the electric telescopic rod is in a specified extension state, and sends the specific data of the working number and the specific data of the extension of the electric telescopic rod to the storage module 28;

[0086] When the control module 26 controls the electric telescopic rod to work: the calculation module 29 is used to calculate the frequency of the filter 8 being blocked when the output end of the electric telescopic rod is in each extension state, and send the calculation result to the storage module 28;

[0087] The comparison module 30 is used to compare the frequency of the filter screen 8 being blocked when the electric telescopic rod is in different extension states, and arrange the comparison results from small to large, and then send the extension state of the electric telescopic rod when the working frequency of the servo motor 6 is the minimum to the control module 26. After the electric telescopic rod completes a telescopic process, the control module 26 controls the electric telescopic rod to maintain the extension state so that the electric telescopic rod drives the three-way pipe 3 to move to a depth with less suspended impurities in the water, so as to facilitate the normal operation of the impeller flowmeter 5.

[0088] The calculation module 29 calculates the data:

[0089]

[0090] Wherein, f is the frequency at which the filter 8 is blocked;

[0091] T is the specified time interval, which is the preset value;

[0092] X is the number of times the filter screen 8 is blocked when the electric telescopic rod is in a certain extension state; thus, the frequency of the filter screen 8 being blocked when the electric telescopic rod is in a specified extension state can be obtained.

[0093] The above are only preferred specific implementations of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A water level and flow velocity detection device for a hydraulic project, comprising a mounting rod (1); Features: The mounting rod (1) is provided with a rotating rod (2), the bottom end of the rotating rod (2) is provided with a T-shaped three-way pipe (3), a partition (16) is rotatably installed in the third joint of the three-way pipe (3), an elastic airbag (17) is fixedly installed on the top wall of the partition (16), an intake valve (18) and an exhaust valve (19) are embedded on the side wall of the elastic airbag (17), the output end of the exhaust valve (19) extends to the bottom wall of the partition (16), an air pipe (20) is inserted on the side wall of the third joint of the three-way pipe (3), and the air bag (17) is fixedly installed on the top wall of the partition (16). The air pipe (20) is connected to the third joint of the three-way pipe (3), the top end of the air pipe (20) extends to the side wall of the mounting rod (1), and the three-way pipe (3) is provided with an extrusion mechanism for extruding the elastic airbag (17); the first joint and the second joint of the three-way pipe (3) are both provided with a flow guide pipe (4), and the third joint of the three-way pipe (3) is connected to the rotating rod (2), the connecting line between the first joint and the second joint of the three-way pipe (3) is perpendicular to the rotating rod (2), and each of the flow guide pipes (4) is provided with an impeller flow meter (5); A servo motor (6) is detachably mounted on the mounting rod (1), and the servo motor (6) is used to drive the rotating rod (2) to rotate; Each of the flow guide tubes (4) is provided with a sleeve (7) with openings at both ends, a filter screen (8) is fixedly mounted on one end of the sleeve (7) away from the impeller flow meter (5), the filter screen (8) is arc-shaped, and a raised portion of the filter screen (8) is located outside the flow guide tube (4), the filter screen (8) is used to block impurities in the water, and a trigger mechanism for triggering the servo motor (6) to operate is provided on the flow guide tube (4); The mounting rod (1) is provided with a distance measuring module (9), the distance measuring module (9) is used to measure the water surface height, and the mounting rod (1) is provided with a communication module (10), the communication module (10) is used to send data detected by the distance measuring module (9) and the impeller flow meter (5); The squeezing mechanism comprises a mounting plate (31) vertically fixedly mounted in a third joint of the three-way pipe (3); a reciprocating screw (21) is vertically fixedly mounted on the bottom wall of the mounting plate (31); a pressing plate (22) is threadedly mounted on the reciprocating screw (21); the pressing plate (22) is used to squeeze the elastic airbag (17) downwards; and an anti-rotation mechanism cooperating with the pressing plate (22) is provided on the three-way pipe (3); The anti-rotation mechanism comprises a water baffle (24) mounted on the bottom wall of the three-way pipe (3) for vertical rotation, the longitudinal section of the water baffle (24) being an isosceles trapezoid, the surface area of ​​the top wall of the water baffle (24) being larger than the surface area of ​​the bottom wall, and a connecting rod (23) being fixedly mounted on one end of the top wall of the water baffle (24), the top end of the connecting rod (23) extending into the three-way pipe (3); A guide rod (25) is vertically fixedly mounted on the portion of the connecting rod (23) located inside the three-way pipe (3); a guide rod (25) is fixedly mounted on the connecting rod (23); the guide rod (25) penetrates the pressing plate (22), and the guide rod (25) is slidably matched with the pressing plate (22).

2. A water level and flow velocity detection device for water conservancy projects according to claim 1, characterized in that: The trigger mechanism comprises an elastic member (11) fixedly mounted on the inner wall of the flow guide tube (4), the elastic member (11) being used to push the sleeve (7) to extend out of the flow guide tube (4), and a switch (12) electrically connected to the servo motor (6) being fixedly mounted on the inner wall of the flow tube, the switch (12) being used to control the operation of the servo motor (6).

3. A water level and flow velocity detection device for water conservancy projects according to claim 2, characterized in that: The sleeve (7) is rotatably inserted into the guide tube (4); a guide groove (13) is obliquely provided on the inner wall of the guide tube (4); a transverse groove (14) is provided at one end of the guide groove (13) close to the impeller flow meter (5); a slider (15) is slidably installed in the guide groove (13); the slider (15) is slidably matched with the transverse groove (14); and the slider (15) is fixedly connected to the sleeve (7).

4. A water level and flow velocity detection device for water conservancy projects according to claim 1, characterized in that: The pressing plate (22) is provided with an arc-shaped groove (32), and the guide rod (25) passes through the arc-shaped groove (32).

5. A water level and flow velocity detection device for water conservancy projects according to claim 1, characterized in that: The top end of the three-way pipe (3) is fixedly connected to the center of the partition plate (16).

6. A water level and flow velocity detection device for water conservancy projects according to claim 1, characterized in that: The mounting rod (1) is provided with a control module (26), a counting module (27), a storage module (28), a calculation module (29), and a comparison module (30); and the rotating rod (2) is an electric telescopic rod; The control module (26) is used to control the operation of the electric telescopic rod. The counting module (27) is used to record the number of times the servo motor (6) works when the electric telescopic rod is in a specified extension state, and to send specific data of the number of times the servo motor works and specific data of the extension of the electric telescopic rod to the storage module (28); The calculation module (29) is used to calculate the frequency of the filter (8) being blocked when the output end of the electric telescopic rod is in each extended state, and send the calculation result to the storage module (28); The comparison module (30) is used to compare the frequency of clogging of the filter screen (8) when the electric telescopic rod is in different extension states.

7. A water level and flow velocity detection device for water conservancy projects according to claim 6, characterized in that: The calculation module (29) calculates the data: Wherein, f is the frequency at which the filter (8) is blocked; T is the specified time interval, which is the preset value; X is the number of times the filter screen (8) is blocked when the electric telescopic rod is in a certain extension state.

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