Water level detection device based on river channel warning

Abstract

The invention relates to the technical field of hydrographic survey, and discloses a riverway warning-based water level detection device, which comprises an installer, a cross rod fixedly installed at the top of the installer, a water level detector arranged at one end of the cross rod, and a connecting piece fixedly connected to the outer part of the water level detector, the transmission piece enables the calibration plate to rotate to the position under the water level detector through the transmission belt, and the connecting piece can drive the water level detector to move downwards through the lifting unit. Transmission is conducted through the transmission part, the condition of the water level detector can be fed back in time through the calibration plate, continuity and accuracy of monitoring data are ensured, long-time wrong data caused by equipment drifting faults are avoided, the overall reliability of monitoring equipment is improved, rapid maintenance and replacement are achieved in cooperation with the lifting unit, and the practicability is high. Downtime caused by faults of the water level detector is shortened, long-term stable operation of the monitoring system is guaranteed, and the warning effect that the water level detector is larger than the water level of the river channel is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of hydrological measurement, and in particular to a water level detection device based on river warning. Background Art

[0002] In the field of modern hydrological monitoring, radar water level gauges are used as important monitoring equipment to warn of river water level conditions, and their accuracy is crucial to the accuracy of the data.

[0003] However, in the prior art, as the use time increases, the monitoring accuracy of the equipment is likely to gradually decrease, or even exceed the error range. To address this problem, it is first impossible to quickly and conveniently determine whether the radar water level meter has an error. After knowing that the radar water level meter has an error, since the radar water level meter is usually installed above the river and at a certain height from the water surface, this makes it difficult for operators to maintain and overhaul the equipment. The existing vertical pole and horizontal bar structures are fixed, and the height and length cannot be adjusted according to actual conditions. Some areas use foldable brackets to facilitate the replacement of radar water level gauges, but such structures have poor stability and are easily affected by external forces and shake or tilt, affecting equipment performance. In addition, the foldable vertical pole is limited in weight, volume, and adaptability to the use environment. Usually, the fixed structure is still limited, resulting in poor equipment adaptability and the inability to conveniently calibrate the radar water level meter. The main solutions currently adopted are as follows: First, the equipment is dismantled regularly, ground calibration is performed, and then reinstalled. Although this method can ensure the accuracy of the equipment, it is cumbersome and time-consuming, and the equipment may be damaged during the disassembly and installation process. The second is to use portable calibration equipment for on-site calibration, but this method is limited by the equipment performance and operating environment, and the calibration effect is poor. During the calibration process, the equipment performance deteriorates due to disassembly, transportation, etc., and the calibration cycle is long, which may cause errors in the monitoring data for a period of time, especially in areas with heavy rains in a short period of time. The distortion of monitoring data caused by the decline in equipment accuracy will have an adverse impact on water resources management, flood warning and other aspects. There are certain limitations, and the accuracy of hydrological monitoring data cannot be guaranteed, and the smooth implementation of river warnings cannot be guaranteed.

[0004] To this end, a water level detection device based on river warning is proposed, which can conveniently and efficiently calibrate the radar water level meter without affecting the monitoring work, and can also quickly repair and replace the radar water level meter. Summary of the invention

[0005] The purpose of the present invention is to provide a water level detection device based on river warning to solve the problem of inconvenient calibration and maintenance of radar water level gauges.

[0006] The technical solution of the present invention is: a water level detection device based on river channel warning, including an installer, and also including a cross bar fixedly installed on the top of the installer, a water level detector arranged at one end of the cross bar, a connecting piece fixedly connected to the outside of the water level detector, a stepping motor fixedly arranged on one side of the cross bar, a limiter slidably connected to the inside of the cross bar, a transmission piece arranged at the output end of the limiter, a calibration piece arranged on one side of the water level detector, and a lifting unit arranged on the other side of the water level detector, a mounting frame is arranged on the side of the cross bar close to the transmission piece, the transmission piece is rotatably connected to the outside of the mounting frame, one side of the limiter is in contact with the transmission piece, the limiter is used to limit the connecting piece, the calibration piece includes a supporting frame fixedly connected to the mounting frame, a calibration plate rotatably connected to the inside of the supporting frame, and a transmission belt connected between the calibration plate and the transmission piece, the transmission piece rotates the calibration plate to directly below the water level detector through the transmission belt, and the connecting piece can drive the water level detector to move downward through the lifting unit.

[0007] Furthermore, the installer includes a fixing rod, a control member fixedly arranged on the outside of the fixing rod, a solar panel fixedly arranged on the top end of the fixing rod, a fixing sleeve fixedly connected to the outside of the fixing rod, and a mounting shell and a guide rod connected between the fixing sleeve and the cross bar, the mounting shell is located on one side of the fixing rod, the lifting unit is located inside the mounting shell, the central axes of the guide rod and the fixing rod coincide, the connecting member is slidably connected to the outside of the guide rod, and a protective shell is arranged on the top of the cross bar, and the protective shell is located outside the limit member and the transmission member.

[0008] Furthermore, the transmission member includes a three-claw wheel fixedly connected to the output end of the stepper motor, and an extrusion member and a linkage member rotatably connected to the outside of the mounting frame. The three-claw wheel passes through the extrusion member and the linkage member, the linkage member is located below the extrusion member, and the extrusion member is in contact with the limit member.

[0009] Furthermore, the limiting member includes a limiting block slidably connected to the inside of the cross bar, a compressed arc block fixedly arranged on one side of the limiting block, and a spring telescopic rod connected between the limiting block and the cross bar, and the compressed arc block is fitted with the three-claw wheel.

[0010] Furthermore, the three-claw wheel includes a first arc claw wheel fixedly connected to the output end of the stepper motor, and a second arc claw wheel connected to the bottom end of the first arc claw wheel, and the claw hooks of the first arc claw wheel and the second arc claw wheel are in opposite directions.

[0011] Furthermore, the extrusion member includes a cam rotatably connected to the outside of the mounting frame, a plurality of upper one-way hooks arranged at equal angles and connected to the inside of the cam, and a closed convex plate fixedly clamped on the top of the cam, and the cam fits with the compressed arc block.

[0012] The linkage member comprises a transmission wheel rotatably connected to the outside of the mounting frame, a plurality of lower one-way hook claws arranged at equal angles and connected to the inside of the transmission wheel, and a closed ring fixedly clamped on the top of the transmission wheel.

[0013] Furthermore, the bottom of the first arc claw wheel is located inside the cam, the first arc claw wheel is fitted with the upper one-way hook claw, the bottom of the secondary arc claw wheel is located inside the transmission wheel, the secondary arc claw wheel is fitted with the lower one-way hook claw, and the directions of the upper one-way hook claw and the lower one-way hook claw correspond to the first arc claw wheel and the secondary arc claw wheel of the secondary arc claw respectively.

[0014] Furthermore, the support frame includes a support sleeve fixedly connected to the mounting frame, and a bottom shell fixedly connected to the bottom end of the support sleeve, the calibration plate includes a force-bearing wheel rod rotatably connected to the inside of the support sleeve, and a straight plate fixedly connected to the bottom end of the force-bearing wheel rod, the straight plate is located below the water level detector, and the transmission belt is sleeved between the transmission wheel and the top end of the force-bearing wheel rod.

[0015] Furthermore, the connecting member includes a connecting rod fixedly connected to the water level detector, and a side column fixedly connected to one side of the connecting rod, the connecting rod is slidably connected to the guide rod, the side column is fixedly connected to the lifting unit, and a groove is provided on one side of the connecting rod close to the limit block.

[0016] Furthermore, the lifting unit includes a first driving wheel rotatably connected to the top end of the mounting shell, a driving belt fixedly connected to the side column, a second driving wheel rotatably connected to the bottom end of the mounting shell, and a crank fixedly connected to the second driving wheel, the driving belt is connected between the first driving wheel and the second driving wheel, the driving belt is parallel to the guide rod, a blocking strip is provided inside the top end of the mounting shell, the blocking strip does not contact the first driving wheel, one side of the blocking strip coincides with one side of the side column, and a locking piece is provided on the outside of the stepping motor.

[0017] Beneficial effects of the present invention: By transmitting through the transmission parts, the calibration plate can timely feedback the status of the water level detector, ensuring the continuity and accuracy of the monitoring data. For those who rely on real-time water level data, the effectiveness of water resource management and flood prevention warning can be guaranteed. At the same time, by driving the calibration plate to rotate, the water level detector can be calibrated quickly to quickly find out whether there is a problem with the water level detector, avoid long-term erroneous data caused by equipment drift failure, improve the overall reliability of the monitoring equipment, and cooperate with the lifting unit to realize rapid maintenance and replacement, reducing the downtime caused by water level detector failure, ensuring the long-term stable operation of the monitoring system, and effectively ensuring the warning function of the water level detector being greater than the river water level.

[0018] The water level detector can be calibrated and fixed through a single drive of a stepper motor. This can be achieved by using an existing stepper motor in combination with a transmission part. Maintenance is convenient and no coding or complex control is required. This not only reduces the complexity and potential errors in the calibration process, but also allows for rapid integration with existing equipment. Multiple functions can be achieved by controlling the stepper motor, which improves the convenience and efficiency of operation, reduces the failure rate of the equipment, and enables the calibration board to reduce monitoring interruptions, ensuring the continuity of monitoring data and improving the reliability of the entire equipment.

[0019] The water level detector can be controlled to move downward by turning the crank without removing the installer, which simplifies the installation process, reduces the time and labor required for installation, and reduces installation costs. The easy-to-install design allows non-professionals to quickly get started, which improves the popularity of installation. The design reduces errors during the installation process and avoids equipment damage or inaccurate calibration caused by improper installation. At the same time, the drive belt can be used to quickly reset the water level detector, and the water level detector can be controlled to move up and down at will. At the same time, the limit block is used to ensure the stability of the water level detector during use, thereby enhancing the operability and maintainability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a three-dimensional structure of the present invention from a first viewing angle; Figure 2 It is a structural schematic diagram of the installer of the present invention; Figure 3 For the present invention Figure 2 The enlarged schematic diagram of point A in the middle; Figure 4 It is a structural schematic diagram of the position limiting member of the present invention; Figure 5 It is a schematic diagram of the structure of the calibration plate of the present invention; Figure 6 It is a structural schematic diagram of the transmission member of the present invention; Figure 7 An exploded view of the transmission member of the present invention; Figure 8 It is a structural schematic diagram of the connecting piece of the present invention; Fig. 9 It is a structural schematic diagram of the lifting unit of the present invention; Fig.10 For the present invention Fig. 9 The enlarged schematic diagram of point B in the middle; Fig.11 For the present invention Fig. 9 Enlarged schematic diagram of point C in the middle.

[0021] In the figure: 1. Installer; 101. Fixing rod; 102. Control part; 103. Solar panel; 104. Fixing sleeve; 105. Mounting shell; 106. Guide rod; 2. Crossbar; 21. Mounting frame; 3. Water level detector; 4. Connector; 41. Connecting rod; 411. Strip groove; 42. Side column; 5. Stepping motor; 6. Limiting part; 61. Limiting block; 62. Pressure arc block; 63. Spring telescopic rod; 7. Transmission part; 71. Three-claw wheel; 711. First arc claw wheel; 712. Second arc claw wheel; 72. Extrusion part; 721, cam; 722, upper one-way hook; 723, closed cam; 73, linkage; 731, transmission wheel; 732, lower one-way hook; 733, closed ring; 8, calibration part; 81, support frame; 811, support sleeve; 812, bottom shell; 82, calibration plate; 821, force wheel rod; 822, straight plate; 83, transmission belt; 9, lifting unit; 91, first drive wheel; 92, drive belt; 93, second drive wheel; 94, crank; 10, protective shell; 11, barrier strip; 12, locking part. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] Reference Figure 1-11 , which is the first embodiment of the present invention, provides a water level detection device based on river warning, including an installer 1, a cross bar 2 fixedly installed on the top of the installer 1, a water level detector 3 arranged at one end of the cross bar 2, a connecting piece 4 fixedly connected to the outside of the water level detector 3, a stepping motor 5 fixedly arranged on one side of the cross bar 2, a limiter 6 slidably connected to the inside of the cross bar 2, a transmission piece 7 arranged at the output end of the limiter 6, a calibration piece 8 arranged on one side of the water level detector 3, and a lifting unit 9 arranged on the other side of the water level detector 3, the cross bar 2 is close to the water level detector 3. A mounting frame 21 is provided on one side of the transmission member 7, and the transmission member 7 is rotatably connected to the outside of the mounting frame 21. One side of the limit member 6 is in contact with the transmission member 7, and the limit member 6 is used to limit the connecting member 4. The calibration member 8 includes a support frame 81 fixedly connected to the mounting frame 21, a calibration plate 82 rotatably connected to the inside of the support frame 81, and a transmission belt 83 connected between the calibration plate 82 and the transmission member 7. The transmission member 7 rotates the calibration plate 82 to the bottom of the water level detector 3 through the transmission belt 83, and the connecting member 4 can drive the water level detector 3 to move downward through the lifting unit 9.

[0024] It can be understood that the water level detector 3, also called water level radar, is an electronic device that uses electromagnetic waves to detect targets. Its main function is to carry out water conservancy monitoring, sewage treatment and flood prevention warning, etc. Its main measurement principle is to transmit radar pulses from the radar water level sensor antenna, and the antenna receives the pulses reflected from the water surface and records the time T. Since the propagation speed C of the electromagnetic wave is a constant, the distance D to the water surface is obtained. Since the height position of the calibration plate 82 will not change, when installing the calibration plate 82, the water level detector 3 will be used first to obtain the distance between the calibration plate 82 and the water level detector 3. Then, the calibration plate 82 can be rotated through the transmission member 7. When the calibration plate 82 reaches the bottom of the water level detector 3, the distance feedback obtained by the water level detector 3 will change. By comparing the feedback distance value with the original data, it can be determined whether there is a problem with the water level detector 3.

[0025] It can be understood that the working principle of the stepper motor 5 is that each time an electric pulse is input, the stepper motor 5 will rotate a fixed angle, and this angle is called the step angle. The speed of the motor depends on the frequency of the pulse signal, and the direction of rotation depends on the number and sequence of the pulse signals. By controlling the power-on sequence and current direction of the stator winding, the forward and reverse rotation of the stepper motor 5 can be achieved. It can be controlled remotely or automatically started by setting a time. The present invention can be set to start the stepper motor 5 once, and the stepper motor 5 will drive once to rotate the transmission member 7 one hundred and eighty degrees. The transmission ratio of the transmission member 7 to the transmission belt 83 is one to one, so that the transmission belt 83 can drive the calibration plate 82 to rotate one hundred and eighty degrees.

[0026] Reference Figure 1-3 The installer 1 includes a fixing rod 101, a control member 102 fixedly arranged on the outside of the fixing rod 101, a solar panel 103 fixedly arranged on the top of the fixing rod 101, a fixing sleeve 104 fixedly connected to the outside of the fixing rod 101, and a mounting shell 105 and a guide rod 106 connected between the fixing sleeve 104 and the cross bar 2. The mounting shell 105 is located on one side of the fixing rod 101, the lifting unit 9 is located inside the mounting shell 105, the central axis of the guide rod 106 and the fixing rod 101 coincide, the connecting member 4 is slidably connected to the outside of the guide rod 106, and a protective shell 10 is provided on the top of the cross bar 2. The protective shell 10 is located outside the limit member 6 and the transmission member 7. The protective shell 10 is used to protect multiple devices. At the same time, the waterproof structure is wrapped around the outside of the stepping motor 5 and other devices during installation, and the structure used for transmission can be selected from stainless steel or hard plastic polyoxymethylene.

[0027] It can be understood that the control component 102 is used to process and transmit sensor data, manage power supply, and ensure stable operation of the equipment. At the same time, it is equipped with a battery inside that can be connected to the stepper motor 5 to provide power support, and the solar panel 103 can use natural light energy to continuously power the equipment, ensuring that the equipment can work for a long time.

[0028] Reference Figure 2-7 The transmission member 7 includes a three-claw wheel 71 fixedly connected to the output end of the stepper motor 5, and an extrusion member 72 and a linkage member 73 rotatably connected to the outside of the mounting frame 21. The three-claw wheel 71 passes through the extrusion member 72 and the linkage member 73. The three-claw wheel 71 can control the rotation of the extrusion member 72 and the linkage member 73. The linkage member 73 is located below the extrusion member 72. The extrusion member 72 is in contact with the limit member 6. The extrusion member 72 controls the movement of the limit member 6. The linkage member 73 controls the calibration member 8 as a whole.

[0029] Reference Figure 2-8 The limiting member 6 includes a limiting block 61 slidably connected to the inside of the cross bar 2, a compressed arc block 62 fixedly arranged on one side of the limiting block 61, a spring telescopic rod 63 connected between the limiting block 61 and the cross bar 2, the compressed arc block 62 is in contact with the three-claw wheel 71, and the three-claw wheel 71 squeezes the compressed arc block 62 to move the limiting block 61. The spring telescopic rod 63 can generate a rebound force after being compressed to achieve the reset of the limiting block 61 and the compressed arc block 62.

[0030] Reference Figure 2-7 The three-claw wheel 71 includes a first arc claw wheel 711 fixedly connected to the output end of the stepper motor 5, and a secondary arc claw wheel 712 connected to the bottom end of the first arc claw wheel 711, and the claw hooks of the first arc claw wheel 711 and the secondary arc claw wheel 712 are in opposite directions, wherein the first arc claw wheel 711 and the secondary arc claw wheel 712 have the same structure, and both have three arc-shaped claws on the outside.

[0031] Reference Figure 2-7 The extrusion member 72 includes a cam 721 rotatably connected to the outside of the mounting frame 21, a plurality of upper one-way hooks 722 arranged at equal angles and connected to the inside of the cam 721, and a closed boss 723 fixedly clamped on the top of the cam 721. The cam 721 fits with the compressed arc block 62, and the cam 721 can be used to squeeze the compressed arc block 62.

[0032] The linkage member 73 includes a transmission wheel 731 rotatably connected to the outside of the mounting frame 21 , a plurality of lower one-way hooks 732 arranged at equal angles and connected to the inside of the transmission wheel 731 , and a closed ring 733 fixedly clamped on the top of the transmission wheel 731 .

[0033] The closing convex disc 723 and the closing ring 733 are both covers for closing, so that the upper one-way hook 722 and the closing convex disc 723 are easy to install, so that the cam 721 and the transmission wheel 731 are closed.

[0034] Reference Figure 1-8 The bottom of the first arc claw wheel 711 is located inside the cam 721, and the first arc claw wheel 711 is fitted with the upper one-way hook claw 722. The bottom of the secondary arc claw wheel 712 is located inside the transmission wheel 731, and the secondary arc claw wheel 712 is fitted with the lower one-way hook claw 732. The directions of the upper one-way hook claw 722 and the lower one-way hook claw 732 correspond to the secondary arc claw first arc claw wheel 711 and the secondary arc claw wheel 712 respectively.

[0035] Among them, the upper one-way hook claw 722 and the lower one-way hook claw 732 have the same structure but are in opposite directions. They are both composed of three hook claws and three springs, and the stepper motor 5 will drive the first arc claw wheel 711 and the upper one-way hook claw 722 to rotate forward and reverse. When the first arc claw wheel 711 and the secondary arc claw wheel 712 rotate, the arc-shaped surfaces of their external arc claws will squeeze or engage the hooks of the upper one-way hook claw 722 and the lower one-way hook claw 732. If the hook is squeezed, the spring will be squeezed and contracted, and transmission cannot be performed. If the arc claw is engaged with the hook, unidirectional drive can be achieved. This is a conventional structure, that is, transmission can only be performed by unidirectional rotation.

[0036] However, the hook directions of the first arc claw wheel 711 and the second arc claw wheel 712 are set opposite to each other, so that the transmission directions of the two are completely opposite, so that the first arc claw wheel 711 can only transmit the cam 721 through the upper unidirectional claw 722 when the stepping motor 5 outputs reverse rotation. Therefore, when the cam 721 rotates, the second arc claw wheel 712 will squeeze the lower unidirectional claw 732, and then the transmission wheel 731 will not rotate, so that the stepping motor 5 can only drive the cam 721 at this time. The limit member 6 as a whole no longer restricts the connecting member 4, and the connecting member 4 can drive the water level detector 3 to move downward through the lifting unit 9. When the stepper motor 5 drives the first arc claw wheel 711 and the secondary arc claw wheel 712 to rotate forward, the secondary arc claw wheel 712 will drive the transmission wheel 731 through the lower unidirectional hook claw 732, and the transmission wheel 731 will rotate forward synchronously with the secondary arc claw wheel 712, thereby realizing the transmission of the transmission belt 83, so that the calibration plate 82 rotates to the bottom of the water level detector 3 for calibration.

[0037] Reference Figure 2-7The support frame 81 includes a support sleeve 811 fixedly connected to the mounting frame 21, and a bottom shell 812 fixedly connected to the bottom end of the support sleeve 811. The calibration plate 82 includes a force wheel rod 821 rotatably connected to the inside of the support sleeve 811, and a straight plate 822 fixedly connected to the bottom end of the force wheel rod 821. The straight plate 822 is located below the water level detector 3. The transmission belt 83 is sleeved between the transmission wheel 731 and the top of the force wheel rod 821. The transmission belt 83 can be used for transmission, and the straight plate 822 can enter the interior of the bottom shell 812. When the straight plate 822 is no longer in use, the bottom shell 812 is used to protect the straight plate 822, and a scraper strip is set at the opening of the bottom shell 812, which can process the surface of the straight plate 822 to prevent the straight plate 822 from being affected by external pollution, and then the straight plate 822 is used to enhance the stability and reliability of the water level detector 3, providing protection for the water level warning work.

[0038] Specifically, the straight plate 822 can cover the bottom end of the water level detector 3, and after the straight plate 822 is installed, the distance value between the straight plate 822 and the water level detector 3 can be obtained by using the water level detector 3. According to this standard value, the water level detector 3 can be accurately calibrated through the straight plate 822 later, that is, the straight plate 822 is driven to the bottom of the water level detector 3, and the water level detector 3 will feedback whether a distance value is equivalent to the standard value. According to this value, it can be easily determined whether there is a problem with the water level detector 3.

[0039] Reference Figure 2-8 The connecting member 4 includes a connecting rod 41 fixedly connected to the water level detector 3, and a side column 42 fixedly connected to one side of the connecting rod 41, the connecting rod 41 is slidably connected to the guide rod 106, and the side column 42 is fixedly connected to the lifting unit 9. A groove 411 is provided on the side of the connecting rod 41 close to the limit block 61, and the limit block 61 can enter the interior of the groove 411, so that the connecting rod 41 and the water level detector 3 are both fixed, and the connecting rod 41 is slidably connected to the guide rod 106, in that an oblique through hole is provided on the connecting rod 41, and the inclination of the oblique through hole is parallel to the guide rod 106, so that the connecting rod 41 can move along the path of the guide rod 106, and the movement of the connecting rod 41 is stabilized by the guide rod 106.

[0040] Reference Figure 1-11The lifting unit 9 includes a first driving wheel 91 rotatably connected to the top of the mounting shell 105, a driving belt 92 fixedly connected to the side column 42, a second driving wheel 93 rotatably connected to the bottom of the mounting shell 105, and a crank 94 fixedly connected to the second driving wheel 93. The driving belt 92 is connected between the first driving wheel 91 and the second driving wheel 93. The driving belt 92 is parallel to the guide rod 106. A blocking strip 11 is provided inside the top of the mounting shell 105. The blocking strip 11 does not contact the first driving wheel 91 to avoid The barrier strip 11 collides with the first driving wheel 91, and one side of the barrier strip 11 overlaps with one side of the side column 42. The barrier strip 11 is used to limit the moving position of the side column 42. A locking member 12 is provided on the outside of the stepper motor 5. The locking member 12 is used to limit the crank 94 to prevent the crank 94 from rotating. The locking member 12 is an existing conventional fixing device, and a protective shell can also be added to the outside of the crank 94 to lock the crank 94 to prevent the crank 94 from being affected by external factors, thereby ensuring convenience and adaptability.

[0041] Specifically, since the side column 42 is fixedly connected to the drive belt 92, when the crank 94 rotates, the second drive wheel 93 drives the drive belt 92 to rotate, and the connection point between the drive belt 92 and the side column 42 also moves accordingly. The drive belt 92 is parallel to the guide rod 106, so that the side column 42 and the connecting rod 41 move synchronously along the path of the guide rod 106. The drive belt 92 can be used to drive the connecting rod 41, the side column 42 and the water level detector 3 to move downward synchronously, so that the position height of the water level detector 3 is lowered. At the same time, the crank 94 is also rotated, so that the drive belt 92 quickly drives the water level detector 3 back to its original position, which is easy to install, maintain and upgrade, and provides convenience for future operations.

[0042] The working principle of the present invention is as follows: by controlling the stepper motor 5 to output forward rotation, the first arc claw wheel 711 and the secondary arc claw wheel 712 rotate synchronously, at this time, the first arc claw wheel 711 will squeeze the upper one-way claw 722, and the upper one-way claw 722 will contract, and the first arc claw wheel 711 cannot be transmitted to the cam 721 through the upper one-way claw 722, and the secondary arc claw wheel 712 will mesh with the lower one-way claw 732 when rotating, and the secondary arc claw wheel 712 drives the transmission wheel 731 through the lower one-way claw 732, so that the transmission wheel 731 rotates 180 degrees, and when the transmission wheel 731 rotates, it is transmitted to the force wheel rod 821 through the transmission belt 83, so that the force wheel rod 821 rotates 180 degrees, and the force wheel rod 821 drives the straight plate 822 to rotate, so that the straight plate 82 2 rotates 180 degrees to reach the bottom of the water level detector 3. At this time, the water level detector 3 outputs electromagnetic waves. Since the position of the straight plate 822 is fixed and known, the water level detector 3 will obtain the distance value to the straight plate 822. By comparing these two values, it can be quickly determined whether there is a problem with the water level detector 3 and whether the water level detector 3 needs maintenance. Then, the stepper motor 5 is started again to rotate forward. The secondary arc claw wheel 712 still rotates the transmission wheel 731 through the lower unidirectional claw 732, and the transmission wheel 731 rotates the straight plate 822 to the inside of the bottom shell 812. When the straight plate 822 enters the inside of the bottom shell 812, it will be processed by the scraper at the opening of the bottom shell 812 to prevent the straight plate 822 from being affected by external objects. If the value has a large deviation, it is necessary to repair and replace the water level detector 3. When the staff arrives, they use the key to release the restriction of the lock 12 on the crank 94, and then control the stepper motor 5 to reverse, so that the first arc claw wheel 711 and the secondary arc claw wheel 712 rotate synchronously. When the first arc claw wheel 711 reverses, it will engage with the upper one-way claw 722, and then the first arc claw wheel 711 is transmitted to the cam 721 through the upper one-way claw 722, so that the cam 721 rotates 180 degrees, and the cam 721 will press the compressed arc block. The compressed arc block 62 is squeezed and translated synchronously with the limit block 61 after being squeezed. The limit block 61 also compresses the spring telescopic rod 63 when moving, and the secondary arc claw wheel 712 squeezes the lower one-way hook claw 732 when reversing, so that the secondary arc claw wheel 712 cannot be transmitted to the transmission wheel 731 through the lower one-way hook claw 732. Then the operator turns the crank 94, and the crank 94 causes the second driving wheel 93 to rotate, and the second driving wheel 93 causes the driving belt 92 and the first driving wheel 91 to rotate synchronously, thereby facilitating the rotation of the drive belt 92 and the first driving wheel 91. The driving belt 92 drives the side column 42 to move, and the connecting rod 41 moves along the path of the guide rod 106, so as to avoid the water level detector 3 from contacting with the external structure, until the connecting rod 41 drives the water level detector 3 to reach a position close to the fixing sleeve 104, thereby lowering the height of the water level detector 3, so that the staff can repair and replace the water level detector 3 conveniently and quickly. After the replacement and repair are completed, the crank 94 can be rotated to make the driving belt 92 drive the side column 42 to move back, and the side column 42 makes the connecting rod 41 and the water level detector 3 close to each other. The detector 3 moves back synchronously, and finally the side column 42 contacts with the barrier strip 11 and is blocked. At this time, the first arc claw wheel 711 is driven by the stepper motor 5, and the first arc claw wheel 711 is transmitted to the cam 721 through the upper unidirectional hook claw 722, so that the cam 721 rotates one hundred and eighty degrees. At this time, the compressed arc block 62 and the limit block 61 lose their extrusion, and the spring telescopic rod 63 rebounds, so that the limit block 61 enters the interior of the strip groove 411, and the connecting piece 4 is then restricted and fixed by the limit block 61, thereby the river water level measurement alarm works.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A water level detection device based on river warning, comprising an installer (1), characterized in that: The device also comprises a crossbar (2) fixedly mounted on the top of the mounter (1), a water level detector (3) arranged at one end of the crossbar (2), a connecting piece (4) fixedly connected to the outside of the water level detector (3), a stepping motor (5) fixedly arranged on one side of the crossbar (2), a stopper (6) slidably connected to the inside of the crossbar (2), a transmission piece (7) arranged at the output end of the stopper (6), a calibration piece (8) arranged on one side of the water level detector (3), and a lifting unit (9) arranged on the other side of the water level detector (3), wherein a mounting frame (21) is arranged on the side of the crossbar (2) close to the transmission piece (7), and the transmission piece (7) is arranged on the other side of the water level detector (3). The calibrating member (8) is rotatably connected to the outside of the mounting frame (21); one side of the limiting member (6) is in contact with the transmission member (7); the limiting member (6) is used to limit the connecting member (4); the calibrating member (8) comprises a supporting frame (81) fixedly connected to the mounting frame (21); a calibrating plate (82) rotatably connected to the inside of the supporting frame (81); and a transmission belt (83) connected between the calibrating plate (82) and the transmission member (7); the transmission member (7) causes the calibrating plate (82) to rotate to the position directly below the water level detector (3) via the transmission belt (83); and the connecting member (4) can drive the water level detector (3) to move downward via the lifting unit (9).

2. The water level detection device based on river warning according to claim 1 is characterized in that: The installer (1) comprises a fixing rod (101), a control member (102) fixedly arranged outside the fixing rod (101), a solar panel (103) fixedly arranged at the top of the fixing rod (101), a fixing sleeve (104) fixedly connected to the outside of the fixing rod (101), and a mounting shell (105) and a guide rod (106) connected between the fixing sleeve (104) and the crossbar (2), wherein the mounting shell (105) is located on one side of the fixing rod (101), the lifting unit (9) is located inside the mounting shell (105), the central axes of the guide rod (106) and the fixing rod (101) coincide with each other, the connecting member (4) is slidably connected to the outside of the guide rod (106), and a protective shell (10) is provided on the top of the crossbar (2), and the protective shell (10) is located outside the limiting member (6) and the transmission member (7).

3. The water level detection device based on river warning according to claim 2 is characterized in that: The transmission member (7) comprises a three-claw wheel (71) fixedly connected to the output end of the stepper motor (5), and an extrusion member (72) and a linkage member (73) rotatably connected to the outside of the mounting frame (21); the three-claw wheel (71) penetrates the extrusion member (72) and the linkage member (73); the linkage member (73) is located below the extrusion member (72); and the extrusion member (72) is in contact with the limiting member (6).

4. The water level detection device based on river warning according to claim 3 is characterized in that: The limiting member (6) comprises a limiting block (61) slidably connected to the interior of the crossbar (2), a compressed arc block (62) fixedly arranged on one side of the limiting block (61), and a spring telescopic rod (63) connected between the limiting block (61) and the crossbar (2), wherein the compressed arc block (62) is in contact with the three-claw wheel (71).

5. The water level detection device based on river warning according to claim 4 is characterized in that: The three-claw wheel (71) comprises a first-arc claw wheel (711) fixedly connected to the output end of the stepping motor (5), and a second-arc claw wheel (712) connected to the bottom end of the first-arc claw wheel (711), wherein the claw hooks of the first-arc claw wheel (711) and the second-arc claw wheel (712) face in opposite directions.

6. The water level detection device based on river warning according to claim 5 is characterized in that: The extrusion member (72) comprises a cam (721) rotatably connected to the outside of the mounting frame (21), a plurality of upper one-way hooks (722) arranged at equal angles and connected to the inside of the cam (721), and a closed convex plate (723) fixedly clamped to the top of the cam (721), wherein the cam (721) is in contact with the compressed arc block (62); The linkage member (73) comprises a transmission wheel (731) rotatably connected to the outside of the mounting frame (21), a plurality of lower one-way hooks (732) arranged at equal angles and connected to the inside of the transmission wheel (731), and a closed ring (733) fixedly clamped to the top of the transmission wheel (731).

7. The water level detection device based on river warning according to claim 6 is characterized in that: The bottom of the first arc claw wheel (711) is located inside the cam (721), the first arc claw wheel (711) is fitted with an upper unidirectional hook claw (722), the bottom of the second arc claw wheel (712) is located inside the transmission wheel (731), the second arc claw wheel (712) is fitted with a lower unidirectional hook claw (732), and the directions of the upper unidirectional hook claw (722) and the lower unidirectional hook claw (732) correspond to the first arc claw wheel (711) and the second arc claw wheel (712) of the second arc claw, respectively.

8. The water level detection device based on river warning according to claim 6 is characterized in that: The support frame (81) comprises a support sleeve (811) fixedly connected to the mounting frame (21), and a bottom shell (812) fixedly connected to the bottom end of the support sleeve (811); the calibration plate (82) comprises a force-bearing wheel rod (821) rotatably connected to the inside of the support sleeve (811), and a straight plate (822) fixedly connected to the bottom end of the force-bearing wheel rod (821); the straight plate (822) is located below the water level detector (3); and the transmission belt (83) is sleeved between the transmission wheel (731) and the top end of the force-bearing wheel rod (821).

9. The water level detection device based on river warning according to claim 4 is characterized in that: The connecting member (4) comprises a connecting rod (41) fixedly connected to the water level detector (3), and a side column (42) fixedly connected to one side of the connecting rod (41); the connecting rod (41) is slidably connected to the guide rod (106); the side column (42) is fixedly connected to the lifting unit (9); and a groove (411) is provided on one side of the connecting rod (41) close to the limit block (61).

10. The water level detection device based on river warning according to claim 9, characterized in that: The lifting unit (9) comprises a first driving wheel (91) rotatably connected to the inside of the top end of the mounting shell (105), a driving belt (92) fixedly connected to the side column (42), a second driving wheel (93) rotatably connected to the inside of the bottom end of the mounting shell (105), and a crank (94) fixedly connected to the second driving wheel (93), the driving belt (92) being connected between the first driving wheel (91) and the second driving wheel (93), the driving belt (92) being parallel to the guide rod (106), a blocking strip (11) being arranged inside the top end of the mounting shell (105), the blocking strip (11) not being in contact with the first driving wheel (91), one side of the blocking strip (11) being overlapped with one side of the side column (42), and a locking member (12) being arranged outside the stepping motor (5).

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