Damping mechanism of bridge scouring monitoring device suitable for extreme water flow

Abstract

The invention relates to the technical field of bridge detection, in particular to a bridge scouring monitoring device damping mechanism suitable for extreme water flow, which comprises a clamping hoop, a protective cover is arranged below the clamping hoop, a monitor is mounted in the protective cover, and a lifting mechanism is arranged between the clamping hoop and the protective cover. Fan blades are used for driving a rotating disc to enable a pull rod to slide in a water suction pipe, a water spraying ring sprays water to disperse impurities outside a protective cover, the monitoring precision is improved, a formed water curtain can enhance the stability of the device, water flow drives the fan blades to rotate to generate induction current, power is supplied to the device, and magnetorheological fluid can generate damping force for vibration reduction; self-adaptive precise vibration reduction is achieved by adjusting current through an induction plate, a buffer rod slides to drive a rack and a gear to conduct transmission, an extrusion rod extrudes a diaphragm, drainage pressure of a water suction pipe is superposed, the pressure intensity of a water spraying ring is improved, the cleaning effect is enhanced, and stable operation and data reliability of the monitoring device in an extreme environment are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge detection, and in particular to a vibration reduction mechanism of a bridge scour monitoring device suitable for extreme water flow. Background Art

[0002] During bridge construction and operation, bridge foundation scour is a key factor affecting bridge structural safety. With the increasing frequency of extreme weather events, the impact of extreme water flows (such as floods and strong tides) on bridge foundation scour is becoming increasingly severe. Accurately monitoring bridge scour is crucial to ensuring safe bridge operation.

[0003] However, in extreme water flow environments, extreme water flows often carry a large amount of impurities such as mud, aquatic plants, and floating objects. These impurities can easily adhere to the surface of the protective cover of the monitoring device, thereby affecting the monitoring accuracy, causing distortion of the monitoring data, and failing to truly reflect the actual scouring conditions of the bridge foundation.

[0004] In view of this, research and improvement are carried out on the existing problems, and a vibration reduction mechanism of a bridge scour monitoring device suitable for extreme water flow is provided, aiming to solve the problem and improve the practical value through this technology. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings existing in the prior art, and to propose a vibration reduction mechanism for a bridge scour monitoring device suitable for extreme water flow. The present invention uses fan blades to drive the turntable to make the pull rod slide in the suction pipe. The water spraying ring can disperse impurities outside the protective cover and improve the monitoring accuracy. The formed water curtain can also enhance the stability of the device. The water flow drives the fan blades to rotate to generate induced current, which not only powers the device, but also enables the magnetorheological fluid to generate damping force for vibration reduction. The current is adjusted by the induction plate to achieve adaptive and precise vibration reduction. The sliding of the buffer rod drives the rack and gear transmission, so that the extrusion rod squeezes the diaphragm, which is superimposed with the drainage pressure of the suction pipe, thereby increasing the pressure of the water spray ring, enhancing the cleaning effect, and ensuring the stable operation of the monitoring device and reliable data in extreme environments.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a vibration reduction mechanism for a bridge scour monitoring device suitable for extreme water flow, comprising a clamp, a protective cover provided below the clamp, a monitor installed inside the protective cover, and a lifting mechanism provided between the clamp and the protective cover; A buffer mechanism is provided on one side of the protective cover, and the buffer mechanism includes a damping tube installed on one side of the lifting mechanism, a buffer rod slides inside the damping tube, and a piston is installed on one end of the buffer rod located inside the damping tube; A power generation mechanism is provided inside the protective cover, the power generation mechanism includes a rotating shaft rotating on the surface of the protective cover, the outer wall of the rotating shaft is provided with fan blades, a magnetic block is rotated at the bottom end of the rotating shaft, a fixing ring is installed at the top end of the inner part of the protective cover, the outer wall of the fixing ring is provided with an electromagnetic coil, and a battery is installed inside the protective cover; A regulating mechanism for regulating the current is provided between the buffer mechanism and the power generation mechanism; The outer wall of the protective cover is provided with a water spray mechanism, which includes a rotating disk installed at the top of the rotating shaft, a water suction pipe is installed on the top side wall of the protective cover, a pull rod is slidably provided inside the water suction pipe, a movable plate is installed at the top of the pull rod, and a water spray ring is provided at the bottom end of the protective cover, and a water pipe is connected between the water spray ring and the pull rod; A pressurizing mechanism for enhancing water spraying is provided between the buffer mechanism and the water spraying mechanism.

[0007] Preferably: the lifting mechanism includes a servo motor installed on the surface of the clamp, a slide rail is welded under the clamp, a screw rod rotates inside the slide rail, a slide plate is threadedly connected to the outer wall of the screw rod, and one side of the slide plate is fixedly connected to one side of the damping tube.

[0008] Preferably, the buffer mechanism further comprises magnetorheological fluid filled in the damping tube, an excitation coil is installed on the inner layer of the damping tube, the excitation coil is electrically connected to the battery via a wire, and telescopic rods are provided on both sides of the damping tube.

[0009] Preferably, one end of the buffer rod is fixedly connected to the side wall of the protective cover, and a spring A is sleeved on the outer wall of the buffer rod located outside the damping tube.

[0010] Preferably: the adjustment mechanism includes a sliding rheostat installed inside the protective cover, the inner wall of the protective cover is provided with a sliding rod that pushes the sliding rheostat to move, the end of the sliding rod that passes through the interior of the protective cover is provided with an induction plate, and the electromagnetic coil and the battery, and the battery and the sliding rheostat are electrically connected through wires.

[0011] Preferably, a plurality of groups of springs B are installed between one side of the induction plate and the outer wall of the protective cover.

[0012] Preferably, a plurality of groups of protrusions are installed at equal intervals on the top of the turntable, and the movable plate is in sliding contact with the protrusions.

[0013] Preferably, a one-way valve is installed at the water inlet and the water outlet of the water suction pipe, a filter is installed at the water inlet of the water suction pipe, and a spring C is provided inside the water suction pipe.

[0014] Preferably: the boosting mechanism includes a rotating rod rotating at the bottom end of the protective cover, the outer wall of the rotating rod is provided with a circular plate, an extrusion rod is slidably provided at the bottom end of the inner part of the protective cover, a hinged rod is hinged between the circular plate and the extrusion rod, a diaphragm is provided on the inner wall of the water spray ring, the diaphragm is made of nitrile rubber, and a driving assembly is provided at the top of the rotating rod.

[0015] Preferably, the driving assembly includes a gear sleeved on the top of the rotating rod, one side of the gear is meshedly connected with a rack, and a connecting rod is fixedly connected between one side of the buffer rod and one side of the rack.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention utilizes the rotation of the fan blades to drive the coaxial turntable to rotate. The turntable protrusion intermittently pushes the movable plate, causing the pull rod connected to it to slide back and forth in the water suction pipe. When the pull rod moves up, the air pressure in the water suction pipe decreases to form negative pressure, the water inlet one-way valve opens, and water flows in under the external water pressure. After the turntable protrusion is separated from the movable plate, the spring C pushes the pull rod downward, the pressure in the water suction pipe increases, the water inlet one-way valve closes, and the water outlet one-way valve opens. Water is squeezed to the water spray ring through the water supply pipe and sprayed out from the water outlet hole. The sprayed water flow can disperse impurities such as mud, aquatic plants, etc. outside the protective cover, ensuring that the monitor accurately collects bridge scour parameters and improves monitoring accuracy. At the same time, the water flow forms a "water curtain" outside the protective cover, acting as a buffer medium, reducing the impact force and friction of extreme water flow on the protective cover, reducing the shaking amplitude of the device, and enhancing its stability in harsh water flow environment, ensuring that the monitoring work is carried out continuously and stably, and providing strong data support for bridge safety assessment.

[0017] 2. The present invention drives the fan blades at the top of the protective cover to rotate when water flow impacts, driving the rotating shaft and the bottom magnetic block to rotate, causing the electromagnetic coil to generate an induced current, which is transmitted to the battery for storage and powering the device. At the same time, the current is transmitted to the excitation coil in the damping tube in the buffer mechanism, causing the magnetorheological fluid to generate a damping force, thereby achieving preliminary vibration reduction. When extreme water flow occurs, the induction plate is displaced by the impact of the water flow, driving the sliding rheostat slider to move, changing the resistance value of the connected circuit, adjusting the circuit current according to Ohm's law, adaptively adjusting the current entering the magnetorheological fluid, and accurately controlling its viscosity change, so that the buffer mechanism maintains the best vibration reduction effect under the impact of extreme water flow of different intensities, reduces the vibration amplitude of the monitoring device, ensures the accuracy and stability of the monitoring data, and effectively copes with the impact of extreme water flow environment on the monitoring device.

[0018] 3. In the present invention, when the buffer mechanism is in operation, the buffer rod is impacted by the water flow and slides back and forth in the damping tube, and the rack is driven to move back and forth in a straight line in the protective cover through the connecting rod. Since the rack is engaged with the gear, the movement of the rack is converted into the rotation of the gear, which in turn drives the rotating rod and the outer wall circular plate to rotate. When the circular plate rotates, the articulated rod drives the extrusion rod to slide back and forth at the bottom end of the protective cover, squeezing the diaphragm on the inner wall of the water spray ring. The deformation of the diaphragm generates additional pressure on the water in the water spray ring, which is superimposed on the drainage pressure of the suction pipe, greatly increasing the internal pressure of the water spray ring. Under the action of high pressure, water is ejected from the water outlet of the water spray ring at a high speed, with a higher injection speed and stronger impact force. Even in harsh environments where extreme water flow carries a large amount of mud and sand, it can quickly and efficiently remove impurities on the surface of the protective cover, keep the device clean, and significantly improve the cleaning efficiency, thereby ensuring the long-term stable and accurate operation of the monitoring device in extreme environments and ensuring the reliability of the monitoring data. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic structural diagram of the lifting mechanism of the present invention; Figure 3 Schematic diagram of the cross-sectional structure of the damping tube of the present invention; Figure 4 This is a schematic cross-sectional view of the protective cover of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure of part A; Figure 6 It is a schematic structural diagram of the water spraying mechanism of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram of part B in the middle; Figure 8 It is a structural schematic diagram of the boosting mechanism of the present invention.

[0020] Legend: 1. Clamp; 2. Protective cover; 3. Monitor; 4. Lifting mechanism; 401. Servo motor; 402. Slide rail; 403. Screw rod; 404. Slide plate; 5. Buffer mechanism; 501. Damping tube; 502. Buffer rod; 503. Piston; 504. Magnetorheological fluid; 505. Excitation coil; 506. Spring A; 6. Generating mechanism; 601. Rotating shaft; 602. Fan blade; 603. Magnetic block; 604. Fixing ring; 605. Electromagnetic coil; 606. Battery; 7. Adjusting mechanism; 701, sliding rheostat; 702, sliding rod; 703, induction plate; 704, spring B; 8, water spraying mechanism; 801, turntable; 802, water suction pipe; 803, pull rod; 804, movable plate; 805, spring C; 806, water pipe; 807, water spraying ring; 9, boosting mechanism; 901, rotating rod; 902, circular plate; 903, hinged rod; 904, extrusion rod; 905, diaphragm; 906, gear; 907, rack; 908, connecting rod. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, 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. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See Figures 1 to 8 As shown, the present invention provides a vibration reduction mechanism for a bridge scour monitoring device suitable for extreme water flow, comprising a clamp 1, a protective cover 2 is provided below the clamp 1, a monitor 3 is installed inside the protective cover 2, and a lifting mechanism 4 is provided between the clamp 1 and the protective cover 2; A buffer mechanism 5 is provided on one side of the protective cover 2. The buffer mechanism 5 includes a damping tube 501 installed on one side of the lifting mechanism 4. A buffer rod 502 slides inside the damping tube 501. A piston 503 is installed at one end of the buffer rod 502 located inside the damping tube 501. A power generation mechanism 6 is provided inside the protective cover 2. The power generation mechanism 6 includes a rotating shaft 601 that rotates on the surface of the protective cover 2. The outer wall of the rotating shaft 601 is provided with a fan blade 602. A magnetic block 603 is rotated at the bottom end of the rotating shaft 601. A fixing ring 604 is installed at the top end of the inner part of the protective cover 2. The outer wall of the fixing ring 604 is provided with an electromagnetic coil 605. A battery 606 is installed inside the protective cover 2. A regulating mechanism 7 for regulating the current is provided between the buffer mechanism 5 and the power generation mechanism 6; It should be noted that when the water flow hits the monitoring device, the water flow directly acts on the fan blade 602 at the top of the protective cover 2. The fan blade 602 starts to rotate under the driving force of the water flow. Since the fan blade 602 is sleeved on the rotating shaft 601, the rotation of the fan blade 602 will drive the rotating shaft 601 to rotate synchronously, so that the magnetic block 603 installed at the bottom of the rotating shaft 601 also rotates. Relative motion is generated between the magnetic block 603 and the electromagnetic coil 605 on the outer wall of the top fixing ring 604 inside the protective cover 2. According to the law of electromagnetic induction, the rotation of the magnetic block 603 cuts the electromagnetic coil 605. Magnetic flux lines generate an induced current in the electromagnetic coil 605. The generated current is transmitted to the battery 606 through a wire for storage. The generated electrical energy serves as a backup power source to provide power support for performance adjustment of the magnetorheological fluid 504 in the buffer mechanism 5. At the same time, the generated current is also transmitted to the excitation coil 505 in the damping tube 501 in the buffer mechanism 5. When the excitation coil 505 is energized, it generates a magnetic field. This magnetic field acts on the magnetorheological fluid 504 in the damping tube 501, giving the magnetorheological fluid 504 a certain damping force, thereby playing a preliminary vibration reduction role. When extreme water flow occurs, the induction plate 703 is displaced due to the impact force of the water flow, causing the induction plate 703 to be displaced and driving the slider on the surface of the sliding rheostat 701 to move. The resistance value of the sliding rheostat 701 connected to the circuit changes with the position of the slider. According to Ohm's law, the current in the circuit is adjusted accordingly, thereby realizing adaptive adjustment of the current entering the magnetorheological fluid 504 according to the water flow size, accurately controlling the viscosity change of the magnetorheological fluid 504, and enabling the buffer mechanism 5 to always maintain the best vibration reduction effect under the impact of extreme water flows of different intensities, effectively reducing the vibration amplitude of the monitoring device, and ensuring the accuracy and stability of the monitoring data.

[0023] The outer wall of the protective cover 2 is provided with a water spray mechanism 8, which includes a rotating disk 801 mounted on the top of the rotating shaft 601. A water suction pipe 802 is mounted on the top side wall of the protective cover 2. A pull rod 803 slides inside the water suction pipe 802. A movable plate 804 is mounted on the top of the pull rod 803. A water spray ring 807 is sleeved on the bottom end of the protective cover 2. A water supply pipe 806 is connected between the water spray ring 807 and the pull rod 803. It should be noted that when the water flow impacts the monitoring device and drives the fan blades 602 in the power generation mechanism 6 to rotate, the turntable 801 coaxially connected to the fan blades 602 rotates synchronously therewith, and the evenly distributed protrusions on the top of the turntable 801 intermittently contact the movable plate 804 and apply thrust during the rotation. Since the movable plate 804 is fixedly connected to the pull rod 803, the movement of the movable plate 804 drives the pull rod 803 to slide back and forth in the water suction pipe 802. When the pull rod 803 moves upward, the internal space of the water suction pipe 802 increases, the air pressure decreases, and a negative pressure environment is formed. At this time, the one-way valve at the water inlet of the water suction pipe 802 opens. Under the action of external water pressure, water enters the water suction pipe 802 through the water inlet. At the same time, as the turntable 801 continues to rotate, when the turntable 801 rotates, The disc 801 protrudes and disengages from the movable plate 804. Under the elastic force of the spring C805 inside the water suction pipe 802, the movable plate 804 drives the pull rod 803 to move downward, the internal space of the water suction pipe 802 shrinks, the pressure increases, the water inlet one-way valve closes, and the water outlet one-way valve opens. At this time, the inhaled water is squeezed and transported to the water spray ring 807 through the water pipe 806 under the action of pressure. The water outlet holes evenly distributed on the water spray ring 807 spray the water to form a water flow with a certain pressure, so that the water flow can effectively disperse the mud, sand, aquatic plants and other impurities attached to the outside of the protective cover 2. By removing impurities in time, it is ensured that the monitor 3 can accurately obtain various parameters of bridge scour, provide reliable data support for bridge safety assessment, and thus improve monitoring accuracy; In addition, the sprayed water forms a continuous "water curtain" on the outside of the protective cover 2. This "water curtain" acts as a buffer medium between the water flow and the surface of the protective cover 2. In extreme water flow environments, the "water curtain" can effectively reduce the direct impact force of the water flow on the protective cover 2, and at the same time reduce the friction between the water flow and the surface of the protective cover 2. The reduction in impact force and friction greatly reduces the shaking amplitude of the monitoring device caused by the impact of water flow, further improving the stability of the device in harsh water flow environments, and ensuring the continuous and stable progress of monitoring work.

[0024] A booster mechanism 9 for enhancing water spraying is provided between the buffer mechanism 5 and the water spraying mechanism 8 .

[0025] As described above, the fan blades 602 are driven by the water flow to generate electricity through the power generation mechanism 6, which provides energy for the magnetorheological fluid 504 in the buffer mechanism 5 to achieve vibration reduction, and as the impact intensity of the water flow changes, the damping force of the magnetorheological fluid 504 will also change accordingly, achieving an adaptive vibration reduction effect; the adjustment mechanism 7 and the buffer mechanism 5 are linked through the induction plate 703. When the water flow impacts, the induction plate 703 is displaced by the force, driving the slide rod 702 to move, thereby pushing the slider of the sliding rheostat 701 to change its resistance value connected to the circuit, and then controlling the current flowing into the excitation coil 505, so that the viscosity of the magnetorheological fluid 504 changes, and the damping force is automatically adjusted according to the water flow intensity, effectively reducing the vibration of the device and ensuring the accuracy of the monitoring data; using the generator When the structure 6 is working, it drives the water spraying mechanism 8 to work. The rotating shaft 601 drives the protrusion on the turntable 801 to intermittently push the movable plate 804 to move, thereby realizing water pumping and water spraying. The water is squeezed to the water spraying ring 807 through the water supply pipe 806. The sprayed water flow removes impurities outside the protective cover 2 and forms a water curtain at the same time, reducing the impact and friction of the water flow on the device; when the buffer mechanism 5 is in operation, the buffer rod 502 drives the meshing transmission of the rack 907 and the gear 906 through the connecting rod 908, so that the rotating rod 901 and the circular plate 902 rotate, and then the articulated rod 903 drives the extrusion rod 904 to slide, squeezing the inner wall diaphragm 905 of the water spraying ring 807, and superimposing it with the drainage pressure of the suction pipe 802, thereby increasing the water pressure, enhancing the cleaning effect, and ensuring stable monitoring of the device.

[0026] See Figures 1 to 2 As shown, the lifting mechanism 4 includes a servo motor 401 installed on the surface of the clamp 1, a slide rail 402 is welded under the clamp 1, a screw rod 403 is rotated inside the slide rail 402, and a slide plate 404 is threadedly connected to the outer wall of the screw rod 403, and one side of the slide plate 404 is fixedly connected to one side of the damping tube 501. By controlling the forward and reverse rotation of the servo motor 401, the lifting height of the slide plate 404 can be accurately controlled, thereby realizing precise adjustment of the height position of the monitor 3.

[0027] See Figure 3 As shown, the buffer mechanism 5 also includes a magnetorheological fluid 504 filled in the damping tube 501, the inner layer of the damping tube 501 is installed with an excitation coil 505, the excitation coil 505 is electrically connected to the battery 606 through a wire, and telescopic rods are provided on both sides of the damping tube 501.

[0028] See Figure 3 As shown, one end of the buffer rod 502 is fixedly connected to the side wall of the protective cover 2, and the outer wall of the buffer rod 502 located outside the damping tube 501 is sleeved with a spring A506.

[0029] See Figures 3 and 4As shown, the adjustment mechanism 7 includes a sliding rheostat 701 installed inside the protective cover 2, and a sliding rod 702 sliding on the inner wall of the protective cover 2 to push the sliding rheostat 701 to move. The end of the sliding rod 702 passing through the interior of the protective cover 2 is installed with an induction plate 703, and the electromagnetic coil 605 and the battery 606, as well as the battery 606 and the sliding rheostat 701 are electrically connected through wires.

[0030] See Figures 4 and 5 As shown, multiple groups of springs B704 are installed between one side of the sensing plate 703 and the outer wall of the protective cover 2.

[0031] See Figure 6 As shown, a plurality of groups of protrusions are installed at equal intervals on the top of the rotating disk 801, and the movable plate 804 is in sliding contact with the protrusions.

[0032] See Figures 6 and 7 As shown, one-way valves are installed at the water inlet and outlet of the water suction pipe 802, a filter is installed at the water inlet of the water suction pipe 802, and a spring C805 is provided inside the water suction pipe 802. The filter at the water inlet of the water suction pipe 802 will intercept larger impurities in the water, ensuring that the inhaled water is clean, and providing a clean water source for subsequent water spraying.

[0033] See Figures 6 to 8 As shown, the boosting mechanism 9 includes a rotating rod 901 rotating at the bottom end of the inner part of the protective cover 2, a circular plate 902 is provided on the outer wall of the rotating rod 901, an extrusion rod 904 is slidably provided at the inner bottom end of the protective cover 2, a hinged rod 903 is hinged between the circular plate 902 and the extrusion rod 904, a diaphragm 905 is provided on the inner wall of the water spray ring 807, and the diaphragm 905 is made of nitrile rubber. A driving assembly is provided at the top of the rotating rod 901.

[0034] See Figure 8 As shown, the driving assembly includes a gear 906 sleeved on the top of the rotating rod 901, one side of the gear 906 is meshed with a rack 907, and a connecting rod 908 is fixedly connected between one side of the buffer rod 502 and one side of the rack 907.

[0035] It should be noted that when the buffer mechanism 5 is running, the buffer rod 502 is impacted by the water flow and slides back and forth in the damping tube 501. Since one side of the buffer rod 502 is fixedly connected to the rack 907 through the connecting rod 908, the reciprocating movement of the buffer rod 502 will drive the connecting rod 908 to reciprocate synchronously, thereby driving the rack 907 to make a linear reciprocating movement inside the protective cover 2. Since the rack 907 and the gear 906 are meshed with each other, the linear movement of the rack 907 is converted into the rotational movement of the gear 906, so that the gear 906 then drives the rotating rod 901 to rotate, and the circular plate 902 mounted on the outer wall of the rotating rod 901 rotates synchronously with the rotating rod 901, so that during the rotation of the circular plate 902, one end of the hinged rod 903 makes a circular motion on the circular plate 902, and the other end drives the extrusion rod 904 to slide back and forth at the bottom end of the protective cover 2. During the sliding process, the extrusion rod 904 will press the water spray ring 80 installed on the water spray ring 80 7 applies pressure to the diaphragm 905 on the inner wall, and the squeezed diaphragm 905 will be deformed, generating additional squeezing force on the water in the water spray ring 807, and the water suction pipe 802 will apply a certain pressure to the water in the water spray ring 807 when draining water. At this time, the pressure generated by the booster mechanism 9 and the drainage pressure of the water suction pipe 802 are superimposed on each other, thereby increasing the pressure inside the water spray ring 807. As the pressure inside the water spray ring 807 increases, the water in the water spray ring 807 is ejected at high speed from the water outlet holes on the water spray ring 807 under the action of high pressure, so that the water flow has a higher jet speed and stronger impact force, so that the ejected water flow can effectively impact the impurities on the surface of the protective cover 2. Even under severe working conditions where the extreme water flow carries a large amount of impurities such as mud and sand, the impurities on the surface of the protective cover 2 can be quickly and efficiently removed, and the cleaning state of the monitoring device can be continuously maintained, thereby improving the cleaning efficiency and ensuring the long-term stable and accurate operation of the device under extreme environments.

[0036] Working principle: When water flow hits the monitoring device, the water flow directly acts on the fan blade 602 at the top of the protective cover 2. The fan blade 602 starts to rotate under the driving force of the water flow. Since the fan blade 602 is mounted on the rotating shaft 601, the rotation of the fan blade 602 will drive the rotating shaft 601 to rotate synchronously, causing the magnetic block 603 installed at the bottom of the rotating shaft 601 to rotate accordingly. Relative motion is generated between the magnetic block 603 and the electromagnetic coil 605 on the outer wall of the top fixing ring 604 inside the protective cover 2. According to the law of electromagnetic induction, the magnetic block 603 The rotation cuts the magnetic flux lines of the electromagnetic coil 605, thereby generating an induced current in the electromagnetic coil 605. The generated current is transmitted to the battery 606 through a wire for storage, providing power support for the entire monitoring device. At the same time, the generated current is also transmitted to the excitation coil 505 in the damping tube 501 of the buffer mechanism 5. When the excitation coil 505 is energized, it generates a magnetic field. This magnetic field acts on the magnetorheological fluid 504 in the damping tube 501, giving the magnetorheological fluid 504 a certain damping force, which plays a preliminary vibration reduction role. When an extreme water flow occurs, the induction plate 703 is displaced by the impact of the water flow, causing the induction plate 703 to displace and drive the slider on the surface of the sliding rheostat 701 to move. The resistance value of the sliding rheostat 701 connected to the circuit changes with the position of the slider. According to Ohm's law, the current in the circuit is adjusted accordingly, thereby achieving adaptive adjustment of the current entering the magnetorheological fluid 504 according to the water flow, accurately controlling the viscosity change of the magnetorheological fluid 504, and ensuring that the buffer mechanism 5 always maintains the best vibration reduction effect under the impact of extreme water flows of different intensities, effectively reducing the vibration amplitude of the monitoring device and ensuring the accuracy and stability of the monitoring data; When the water flow impacts the monitoring device and drives the fan blades 602 in the power generation mechanism 6 to rotate, the turntable 801 coaxially connected to the fan blades 602 rotates synchronously therewith, and the evenly distributed protrusions on the top of the turntable 801 intermittently contact the movable plate 804 and apply thrust during the rotation. Since the movable plate 804 is fixedly connected to the pull rod 803, the movement of the movable plate 804 drives the pull rod 803 to slide back and forth in the water suction pipe 802. When the pull rod 803 moves upward, the internal space of the water suction pipe 802 increases, the air pressure decreases, and a negative pressure environment is formed. At this time, the one-way valve at the water inlet of the water suction pipe 802 opens. Under the action of external water pressure, water enters the water suction pipe 802 through the water inlet. At the same time, as the turntable 801 continues to rotate, when the turntable 80 1 The protrusion is out of contact with the movable plate 804. Under the elastic force of the spring C805 inside the water suction pipe 802, the movable plate 804 drives the pull rod 803 to move downward, the internal space of the water suction pipe 802 is reduced, the pressure is increased, the water inlet one-way valve is closed, and the water outlet one-way valve is opened. At this time, the inhaled water is squeezed and transported to the water spray ring 807 through the water pipe 806 under the action of pressure. The water outlet holes evenly distributed on the water spray ring 807 spray the water to form a water flow with a certain pressure, so that the water flow can effectively disperse the mud, sand, aquatic plants and other impurities attached to the outside of the protective cover 2. By removing impurities in time, it is ensured that the monitor 3 can accurately obtain various parameters of bridge scour, provide reliable data support for bridge safety assessment, and thus improve monitoring accuracy; In addition, the ejected water forms a continuous "water curtain" outside the protective cover 2. This "water curtain" acts as a buffer medium between the water flow and the surface of the protective cover 2. In extreme water flow environments, the "water curtain" can effectively reduce the direct impact force of the water flow on the protective cover 2, while reducing the friction between the water flow and the surface of the protective cover 2. The reduction in impact force and friction greatly reduces the shaking amplitude of the monitoring device caused by the impact of the water flow, further improving the stability of the device in harsh water flow environments and ensuring the continuous and stable performance of monitoring work; In addition, when the buffer mechanism 5 is running, the buffer rod 502 is impacted by the water flow and slides back and forth in the damping tube 501. Since one side of the buffer rod 502 is fixedly connected to the rack 907 through the connecting rod 908, the reciprocating movement of the buffer rod 502 will drive the connecting rod 908 to reciprocate synchronously, thereby driving the rack 907 to make a linear reciprocating movement inside the protective cover 2. Since the rack 907 and the gear 906 are meshed with each other, the linear movement of the rack 907 is converted into the rotational movement of the gear 906, so that the gear 906 drives the rotating rod 901 to rotate. The circular plate 902 mounted on the outer wall of the rotating rod 901 rotates synchronously with the rotating rod 901, so that during the rotation of the circular plate 902, one end of the hinged rod 903 makes a circular motion on the circular plate 902, and the other end drives the extrusion rod 904 to slide back and forth at the bottom end of the protective cover 2. During the sliding process, the extrusion rod 904 will press the water ring 807 installed in the water spray ring 807. The diaphragm 905 of the wall exerts pressure, and the squeezed diaphragm 905 will be deformed, generating additional squeezing force on the water in the water spray ring 807, and the water suction pipe 802 will exert a certain pressure on the water in the water spray ring 807 when draining water. At this time, the pressure generated by the booster mechanism 9 and the drainage pressure of the water suction pipe 802 are superimposed on each other, thereby increasing the pressure inside the water spray ring 807. As the pressure inside the water spray ring 807 increases, the water in the water spray ring 807 is ejected at high speed from the water outlet on the water spray ring 807 under the action of high pressure, so that the water flow has a higher jet speed and stronger impact force, so that the ejected water flow can effectively impact the impurities on the surface of the protective cover 2. Even under harsh working conditions where the extreme water flow carries a large amount of impurities such as mud and sand, the impurities on the surface of the protective cover 2 can be quickly and efficiently removed, and the clean state of the monitoring device can be continuously maintained, thereby improving the cleaning efficiency and ensuring the long-term stable and accurate operation of the device under extreme environments.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vibration reduction mechanism for a bridge scour monitoring device suitable for extreme water flow, comprising a clamp (1), characterized in that: A protective cover (2) is provided below the clamp (1), a monitor (3) is installed inside the protective cover (2), and a lifting mechanism (4) is provided between the clamp (1) and the protective cover (2); A buffer mechanism (5) is provided on one side of the protective cover (2), the buffer mechanism (5) comprising a damping tube (501) mounted on one side of the lifting mechanism (4), a buffer rod (502) sliding inside the damping tube (501), and a piston (503) mounted on one end of the buffer rod (502) located inside the damping tube (501); A power generation mechanism (6) is provided inside the protective cover (2), the power generation mechanism (6) comprising a rotating shaft (601) rotating on the surface of the protective cover (2), a fan blade (602) being provided on the outer wall of the rotating shaft (601), a magnetic block (603) being provided for rotation at the bottom end of the rotating shaft (601), a fixing ring (604) being provided at the top end of the inner part of the protective cover (2), an electromagnetic coil (605) being provided on the outer wall of the fixing ring (604), and a storage battery (606) being provided inside the protective cover (2); A regulating mechanism (7) for regulating the magnitude of the current is provided between the buffer mechanism (5) and the power generation mechanism (6); The outer wall of the protective cover (2) is provided with a water spray mechanism (8), the water spray mechanism (8) includes a rotating disk (801) installed at the top of the rotating shaft (601), a water suction pipe (802) is installed on the top side wall of the protective cover (2), a pull rod (803) is slidably provided inside the water suction pipe (802), a movable plate (804) is installed at the top of the pull rod (803), a water spray ring (807) is provided at the bottom end of the protective cover (2), and a water supply pipe (806) is connected between the water spray ring (807) and the pull rod (803); A booster mechanism (9) for enhancing water spraying is provided between the buffer mechanism (5) and the water spraying mechanism (8).

2. The vibration reduction mechanism of a bridge scour monitoring device suitable for extreme water flow according to claim 1, characterized in that: The lifting mechanism (4) comprises a servo motor (401) mounted on the surface of the clamp (1); a slide rail (402) is welded below the clamp (1); a screw rod (403) rotates inside the slide rail (402); a slide plate (404) is threadedly connected to the outer wall of the screw rod (403); and one side of the slide plate (404) is fixedly connected to one side of the damping tube (501).

3. The vibration reduction mechanism of a bridge scour monitoring device suitable for extreme water flow according to claim 1, characterized in that: The buffer mechanism (5) further comprises a magnetorheological fluid (504) filled in the damping tube (501); an excitation coil (505) is installed in the inner layer of the damping tube (501); the excitation coil (505) is electrically connected to the battery (606) via a wire; and telescopic rods are provided on both sides of the damping tube (501).

4. The vibration reduction mechanism of a bridge scour monitoring device suitable for extreme water flow according to claim 1, characterized in that: One end of the buffer rod (502) is fixedly connected to the side wall of the protective cover (2), and the outer wall of the buffer rod (502) located outside the damping tube (501) is sleeved with a spring A (506).

5. The vibration reduction mechanism of a bridge scour monitoring device suitable for extreme water flow according to claim 1 is characterized by: The regulating mechanism (7) includes a sliding rheostat (701) installed inside the protective cover (2), a sliding rod (702) sliding on the inner wall of the protective cover (2) for pushing the sliding rheostat (701) to move, an induction plate (703) installed at one end of the sliding rod (702) extending through the interior of the protective cover (2), and the electromagnetic coil (605) and the battery (606), as well as the battery (606) and the sliding rheostat (701) are electrically connected via wires.

6. The vibration reduction mechanism of a bridge scour monitoring device suitable for extreme water flow according to claim 5, characterized in that: Multiple groups of springs B (704) are installed between one side of the sensing plate (703) and the outer wall of the protective cover (2).

7. The vibration reduction mechanism of a bridge scour monitoring device suitable for extreme water flow according to claim 1, characterized in that: A plurality of groups of protrusions are installed at equal intervals on the top of the rotating disk (801), and the movable plate (804) is in sliding contact with the protrusions.

8. The vibration reduction mechanism of a bridge scour monitoring device suitable for extreme water flow according to claim 1, characterized in that: One-way valves are installed at the water inlet and the water outlet of the water suction pipe (802), a filter is installed at the water inlet of the water suction pipe (802), and a spring C (805) is provided inside the water suction pipe (802).

9. The vibration reduction mechanism of a bridge scour monitoring device suitable for extreme water flow according to claim 1, characterized in that: The boosting mechanism (9) comprises a rotating rod (901) rotating at the bottom end of the interior of the protective cover (2); a circular plate (902) is sleeved on the outer wall of the rotating rod (901); an extrusion rod (904) is slidably provided at the bottom end of the interior of the protective cover (2); a hinged rod (903) is hingedly connected between the circular plate (902) and the extrusion rod (904); a diaphragm (905) is provided on the inner wall of the water spray ring (807); the diaphragm (905) is made of nitrile rubber; and a driving assembly is provided at the top end of the rotating rod (901).

10. The vibration reduction mechanism of a bridge scour monitoring device suitable for extreme water flow according to claim 9, characterized in that: The driving assembly comprises a gear (906) sleeved on the top of the rotating rod (901), one side of the gear (906) is meshedly connected with a rack (907), and a connecting rod (908) is fixedly connected between one side of the buffer rod (502) and one side of the rack (907).

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