A device for measuring the scour depth of bridge piers during the flood season

Abstract

The present invention discloses a device for measuring the scour depth of bridge piers during the flood season, which relates to the technical field of measuring the scour depth of river beds and includes: a base body rotatably installed on a column, a first fixed pulley installed on the bracket of the base body, and a pulse counter for detecting the number of turns of the first fixed pulley provided on the bracket; a telescopic frame provided on the base body, and a second fixed pulley installed on the telescopic end of the telescopic frame; a motor fixed on the base body; a torque sensor fixed on the base body, the input shaft of the torque sensor being connected to the motor through a first coupling; an electromagnetic clutch, the input shaft of which is connected to the output shaft of the torque sensor through a second coupling; a winding wheel disc installed on the base body, the wheel shaft of the winding wheel disc being fixedly connected to the output shaft of the electromagnetic clutch, and the measuring rope on the winding wheel disc bypasses the first fixed pulley and the second fixed pulley, and the end of the measuring rope is connected with a measuring weight; a control box. This device can effectively measure the local scour depth around the bridge pier.

Description

Technical Field

[0001] The present invention relates to the technical field of riverbed scouring depth measurement, and more specifically, to a device for measuring the scouring depth of bridge piers during flood seasons. Background Art

[0002] Cross-river bridges are an important part of the modern transportation network and are crucial for the national economy and social development. After the bridge piers are built in natural river channels, the water flow around the piers is severely disturbed, forming three-dimensional and unsteady water flow structures such as downflow and horseshoe vortices. These structures significantly increase the sediment-carrying capacity of the water flow, resulting in local scouring of the riverbed around the piers. Especially during major floods in the flood season of the river, due to the large water flow and fast flow velocity, the riverbed around the piers is easily over-scoured, exposing the pier foundation, threatening the safety of the bridge, and even causing major accidents such as bridge collapse and casualties. Therefore, real-time monitoring of the local scouring depth around the piers is an important measure to ensure the safe operation of bridges and has increasingly attracted the attention of bridge management departments.

[0003] In order to achieve real-time monitoring of the local scouring depth of bridge piers, a large number of specific technologies, methods, and devices have been proposed by the majority of scientific and technological workers. According to the relative position relationship between the measuring device and the riverbed around the pier, the existing technologies can be classified into three categories: embedded type, contact type, and non-contact type.

[0004] Figure 1 FIG. shows the structural diagram of an embedded local scouring depth monitoring device in the prior art. In this device, the scouring depth sensor 26 is embedded in the riverbed 400 around the bridge pier 100, and the sensor types include fiber Bragg grating, time domain reflectometer, piezoelectric sensor, etc. The main advantage of the embedded scouring depth monitoring device is that the scouring depth sensor can accurately and reliably sense the change in the riverbed elevation, thereby providing accurate scouring depth information. However, its disadvantages are also relatively significant: First, embedding the sensor in the riverbed requires underwater operations such as underwater excavation and piling; Second, the anchoring strength of the sensor embedded in the riverbed is limited, and it is easily uprooted by floods during the flood season of large rivers and loses its monitoring ability; Third, there is large-scale bed load movement on the riverbed surface during the flood season, and the larger-sized pebbles 27 are likely to damage the scouring depth sensor; Finally, relying solely on the embedded local scouring depth monitoring device can only measure the scouring depth at a single point. If large-area monitoring around the pier is required, multiple sets of devices need to be installed, resulting in a significant increase in economic investment.

[0005] Figure 2Schematically shows the structural diagram of a contact - type local scour depth monitoring device in the prior art. This device fixes the scour depth sensor 26 through a connecting frame 29 anchored on the pier 100. The bottom of the sensor contacts the surface of the riverbed 400 and drops as the riverbed is scoured. The types of sensors include gravity detection rods, gravity - type piezoelectric sensors, etc. The contact - type scour depth monitoring device can accurately and reliably sense the changes in the riverbed elevation due to scour. Its main disadvantages are as follows: First, it is difficult for the contact - type local scour depth monitoring device to monitor the process of the riverbed rising due to sedimentation. Second, in order to prevent the scour depth sensor from being washed away by floods, multiple deep holes need to be drilled on the pier to anchor the connecting frame 29, which involves underwater drilling, installation and other operations with extremely high difficulty. At the same time, the drilling itself may damage the pier, so it is usually not allowed by the bridge management department. Third, the pebbles 27 on the surface of the riverbed during the flood season are likely to damage the measuring instrument. Finally, a single set of contact - type local scour depth measuring device can only monitor the scour depth at a single point.

[0006] Figure 3 Schematically shows the structural diagram of a non - contact type scour depth monitoring device disclosed in Patent CN102087360A. This device erects a connecting frame 29 on the pier 100 above the water surface, installs a scour depth sensor 26 on the support, and submerges the sensor below the water surface. The type of the sensor is an ultrasonic rangefinder. The existing non - contact type scour depth monitoring device can avoid underwater operations. By installing multiple sensors on the support and using a rotating support, it can measure the scour depths at multiple measuring points upstream and downstream of the pier, improving the monitoring efficiency. However, there are also several key defects: First, the propagation speed of ultrasonic waves in water is affected by factors such as temperature and sediment concentration, and the data measured under different seasons and water flow conditions may have large errors. Second, the ultrasonic echo signal 37 weakens with the increase of the propagation distance and the sediment concentration in water. However, natural rivers often have the dual characteristics of large water depth and high sediment concentration during the flood season, resulting in very weak signals of the ultrasonic rangefinder during the flood season and making it difficult to obtain reliable scour depth data. Third, there are often a large number of floating objects such as weeds on the surface of natural rivers during the flood season. When these floating objects attach near the support and the sensor, they will not only cause the sensor to fail but may also damage the entire measuring device. Fourth, in order to fix the support on the pier, it is usually necessary to drill holes on the pier, which is difficult to obtain permission from the bridge management department. Fifth, since the support is a cantilever beam structure, the longer the length, the worse the stability, and it is easy to cause measurement errors due to swinging.

[0007] In summary, the local scour monitoring devices in the prior art usually need to operate underwater and drill holes on bridge piers, which are technically difficult and restricted by supervision. At the same time, during the flood season of natural rivers, the flow velocity is fast, the water depth is large, the sediment concentration is high, there are floating objects on the surface, and there is a large amount of pebble movement at the bottom, which easily washes away or collides with the monitoring device or makes the scour depth sensor ineffective. Again, the existing non-contact local scour depth monitoring devices do not consider the change of the sound wave propagation speed with the water flow conditions, resulting in large errors. Finally, the existing devices can only monitor the local area around the bridge pier, and the monitoring efficiency is low. These defects make the existing monitoring devices unable to be truly used for real-time online monitoring of the local scour depth of bridge piers on large rivers, seriously restricting the improvement of the bridge maintenance and management level in China. Summary of the Invention

[0008] In view of this, the present invention provides a device for measuring the scour depth of bridge piers during the flood season to effectively measure the local scour depth around the bridge piers.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] A device for measuring the scour depth of bridge piers during the flood season, comprising:

[0011] A seat body, which is rotatably installed on a column on the pier of the bridge. A first fixed pulley is installed on the bracket of the seat body, and a pulse counter for detecting the number of turns of the first fixed pulley is provided on the bracket;

[0012] A telescopic frame, which is arranged on the seat body, and a second fixed pulley is installed on the telescopic end of the telescopic frame;

[0013] A motor, which is fixed on the seat body;

[0014] A torque sensor, which is fixed on the seat body, and the input shaft of the torque sensor is connected to the motor through a first coupling;

[0015] An electromagnetic clutch, the input shaft of which is connected to the output shaft of the torque sensor through a second coupling;

[0016] A wire winding wheel disc, which is installed on the seat body, the wheel shaft of the wire winding wheel disc is fixedly connected to the output shaft of the electromagnetic clutch, the measuring rope on the wire winding wheel disc is arranged around the first fixed pulley and the second fixed pulley, and the end of the measuring rope is connected with a measuring hammer;

[0017] A control box, which is fixed on the seat body, and the control box is electrically connected to the pulse counter, the motor, the torque sensor and the electromagnetic clutch.

[0018] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a device for measuring the scour depth of bridge piers during the flood season. Adjust the length of the telescopic frame to an appropriate position, control the motor to rotate forward through the control box, the motor drives the wire winding wheel to rotate, and under the action of the measuring hammer, the measuring rope and the measuring hammer quickly sink and fall into the sediment or silt at the bottom of the water. Then, control the motor to rotate reversely through the control box, the measuring rope is gradually straightened, and the torque increases to the maximum value at the moment when the measuring hammer is about to "emerge from the mud". Subsequently, the measuring hammer slowly rises in the water and the torque decreases. At the moment when the measuring hammer leaves the water surface, the buoyancy of the water disappears and the torque value increases again. The torque sensor records the moments when the torque values increase twice. At the same time, the pulse counter calculates the number of turns of the first fixed pulley between these two moments. Since the diameter of the first fixed pulley is known, the water depth can be calculated. The specific water depth calculation formula is , where d is the diameter of the first fixed pulley and n is the number of turns of the first fixed pulley. Then, rotate the seat body to measure the next measuring point.

[0019] Therefore, this device uses a horizontally rotatable seat body and a telescopic frame with adjustable length to achieve the effects of rotary measurement around the bridge pier and adjustable measurement diameter, and cooperates with the pulse counter to achieve convenient measurement of the scour depth around the bridge pier, effectively avoiding the problems that the existing local scour monitoring devices usually need to operate underwater and drill holes on the bridge pier, with high technical difficulty and being restricted by supervision; at the same time, in natural rivers during the flood season, the flow velocity is fast, the water depth is large, the sediment concentration is high, there are floating objects on the surface, and there is a large amount of pebble movement at the bottom, which is easy to wash away or collide with the monitoring device or make the scour depth sensor ineffective; again, the existing non-contact local scour depth monitoring devices do not consider the change of the sound wave propagation speed with the water flow conditions, resulting in large errors; finally, the existing devices can only monitor the local area around the bridge pier, with low monitoring efficiency.

[0020] Furthermore, it further includes: a hand-cranked component for manually controlling the rotation of the wire winding wheel, and the hand-cranked component includes:

[0021] a driving sprocket, which is installed on the seat body through a support seat, and a crank is fixed on the axle of the driving sprocket;

[0022] a driven sprocket, which is sleeved and fixed on the axle of the wire winding wheel, and the driven sprocket is connected to the driving sprocket through a transmission chain.

[0023] The beneficial effects of adopting the above technical solutions are as follows: The hand-cranked component can be used by the surveyor for emergency when the battery power of the control box is insufficient. That is, the power supply of the electromagnetic clutch is cut off through the control box, so that the drive motor is no longer in transmission with the wire-winding wheel. Then, the release and lifting of the measuring weight are realized through the crank. Moreover, after the surveyor has certain experience, it is easy to find the two critical values of the torque change of the measuring weight by hand-cranking, and thus obtain the water depth. Comparing with the experimental results controlled by the motor, the credibility of the measurement results can be improved compared with only using the motor drive method. At the same time, the hand-cranked component has the advantages of simplicity and convenience.

[0024] Further, the telescopic frame includes:

[0025] A fixed suspension, the fixed end of the fixed suspension is fixedly connected to the seat body, and a slider is provided on the bottom end surface of the fixed suspension;

[0026] A sliding suspension, a slide rail is provided on the top end surface of the sliding suspension, the slider is slidably connected to the slide rail, and the second fixed pulley is arranged on the cantilever end of the sliding suspension;

[0027] A driving part, the driving part is arranged on the fixed suspension and is used to drive the telescopic movement of the sliding suspension.

[0028] The beneficial effects of adopting the above technical solutions are as follows: The telescopic movement of the sliding suspension can be realized through the driving part, and further the adjustable measurement diameter can be realized.

[0029] Further, the driving part is an electric push rod or a cylinder or an oil cylinder fixed on the fixed suspension, and the telescopic end of the electric push rod or the cylinder or the oil cylinder is fixed to the sliding suspension.

[0030] The beneficial effects of adopting the above technical solutions are as follows: The automatic telescopic movement of the sliding suspension can be realized, without manual operation, saving time and effort.

[0031] Further, the driving part is a pull rope, and the pull rope is connected to the cantilever end of the sliding suspension.

[0032] Further, a third fixed pulley is installed on the fixed end of the fixed suspension, and a fourth fixed pulley is installed on the cantilever end of the sliding suspension, and the pull rope is wound around the third fixed pulley and the fourth fixed pulley.

[0033] The beneficial effects of adopting the above technical solutions are as follows: The sliding suspension is pushed out manually. When recycling, the sliding suspension can be retracted by manually pulling back the pull rope. This method realizes the telescopic movement of the sliding suspension through manual operation, avoiding the increase in the device cost caused by using an electric push rod or a cylinder or an oil cylinder.

[0034] Further, it further includes a diagonal brace, one end of the diagonal brace is fixedly connected to the fixed suspension, and the other end is fixedly connected to the bracket.

[0035] The beneficial effect of adopting the above technical solution is that the setting of the diagonal brace plays a role in bearing stress and prevents the bracket from being damaged when the measuring weight falls.

[0036] Further, a first limiting ring is installed on the bracket, a second limiting ring is installed on the cantilever end of the sliding suspension, and the measuring rope is threaded through the first limiting ring and the second limiting ring.

[0037] The beneficial effect of adopting the above technical solution is that the first limiting ring and the second limiting ring prevent the measuring rope from detaching from the first fixed pulley and the second fixed pulley after passing around the first fixed pulley and the second fixed pulley.

[0038] Further, the pulse counter includes:

[0039] a magnet, the magnet is installed on the side wall of the first fixed pulley;

[0040] a Hall switch, the Hall switch is installed on the bracket, and the detection end of the Hall switch is arranged corresponding to the position of the magnet, and the Hall switch is electrically connected to the counter in the control box;

[0041] Wherein, an aviation plug interface electrically connected to the Hall switch, the motor, the torque sensor, and the electromagnetic clutch is provided on the seat body, and the control box is electrically connected to the aviation plug interface.

[0042] The beneficial effect of adopting the above technical solution is that when the magnet passes by the Hall switch, the Hall switch feeds back a counting signal (square wave signal), and the counter calculates the number of feedback signals of the Hall switch, and thus the number of turns of the first fixed pulley can be obtained. Here, the setting of the aviation plug interface can facilitate the disassembly and assembly of the control box with the pulse counter, the motor, the torque sensor, and the electromagnetic clutch, so as to facilitate the staff to charge the control box, etc.

[0043] Further, two hanging holes are opened on the seat body, the steel wire of the double-hook tightener is wound around the bridge pier, and the two hooks of the double-hook tightener are respectively hung on the two hanging holes; a universal wheel in rolling contact with the column is provided on the seat body.

[0044] The beneficial effect of adopting the above technical solution is that the setting of the double-hook tightener facilitates the quick disassembly and assembly operation of the device with the bridge pier, avoiding the defect that the existing measuring device needs to punch holes in the bridge pier to damage the bridge pier structure to install the measuring device; and the universal wheel also facilitates the rotation adjustment of the device on the column. Description of the Drawings

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0046] Figure 1 It is a structural schematic diagram of an embedded local scour depth monitoring device in the prior art;

[0047] Figure 2 It is a structural schematic diagram of a contact type local scour depth monitoring device in the prior art;

[0048] Figure 3 It is a structural schematic diagram of a non-contact type local scour depth monitoring device in the prior art;

[0049] Figure 4 It is a structural schematic diagram of a flood season pier scour depth measurement device of the present invention when installed on a pier;

[0050] Figure 5 It is a structural schematic diagram of a flood season pier scour depth measurement device of the present invention;

[0051] Figure 6 is Figure 5 a structural enlarged schematic diagram of part A in;

[0052] Figure 7 is Figure 5 a structural enlarged schematic diagram of part B in;

[0053] Figure 8 It is a schematic diagram of the telescopic frame of the present invention;

[0054] Figure 9 It is a schematic diagram of the control box. Specific embodiments

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0056] As Figures 4 - 9 shown, the embodiments of the present invention disclose a flood season pier scour depth measurement device, including:

[0057] The seat body 1 is rotatably mounted on a column 300 on a cap 200 of a bridge pier 100, a first fixed pulley 2 is mounted on a bracket 11 of the seat body 1, and a pulse counter for detecting the number of revolutions of the first fixed pulley 2 is provided on the bracket 11;

[0058] The telescopic frame 3 is arranged on the base body 1, and a second fixed pulley 4 is installed on the telescopic end of the telescopic frame 3;

[0059] Motor 5, motor 5 is fixed on the base body 1;

[0060] The torque sensor 6 is fixed on the base 1, and the input shaft of the torque sensor 6 is connected to the motor 5 through the first coupling 7;

[0061] An electromagnetic clutch 8, the input shaft of the electromagnetic clutch 8 is connected to the output shaft of the torque sensor 6 via a second coupling 9;

[0062] The winding wheel 10 is mounted on the base 1, the axle of the winding wheel 10 is fixedly connected to the output shaft of the electromagnetic clutch 8, the measuring rope 12 on the winding wheel 10 is arranged around the first fixed pulley 2 and the second fixed pulley 4, and the end of the measuring rope 12 is connected to a measuring hammer 13;

[0063] The control box 14 is fixed on the base body 1 , and the control box 14 is electrically connected to the pulse counter, the motor 5 , the torque sensor 6 , and the electromagnetic clutch 8 .

[0064] Among them, the control box 14 is provided with a power button, a quick release button and a slow release button for controlling the descent of the measuring hammer 13 (the quick release helps the measuring hammer to use its greater inertia to smash into the mud; the slow release can avoid the impact damage to the motor and torque sensor caused by the quick release of the measuring hammer), and an ascending button for controlling the ascending of the measuring hammer 13.

[0065] The device for measuring the scouring depth of bridge piers during flood season also includes: a hand-cranked assembly 15 for manually controlling the rotation of the winding wheel 10, and the hand-cranked assembly 15 includes:

[0066] A driving sprocket 151, which is mounted on the seat body 1 through a supporting seat 152, and a crank 153 is fixed on the axle of the driving sprocket 151;

[0067] The driven sprocket 154 is sleeved on the axle of the winding wheel 10 , and the driven sprocket 154 is connected to the driving sprocket 151 through a transmission chain 155 .

[0068] The telescopic frame 3 comprises:

[0069] A fixed suspension 31, the fixed end of which is fixedly connected to the base body 1, and a slider is provided on the bottom end surface of the fixed suspension 31;

[0070] The sliding suspension 32 is provided with a slide rail 321 on the top end surface thereof. The slider is slidably connected to the slide rail 321. The second fixed pulley 4 is arranged at the cantilever end of the sliding suspension 32.

[0071] The driving part is arranged on the fixed suspension 31 and is used for driving the telescopic movement of the sliding suspension 32.

[0072] The driving part is an electric push rod or a cylinder or an oil cylinder fixed on the fixed suspension 31. The telescopic end of the electric push rod or the cylinder or the oil cylinder is fixed to the sliding suspension 32. In the present invention, the electric push rod is preferably used, so that there is no need to additionally equip an air source and a hydraulic oil source.

[0073] Certainly, the driving part of the present invention may also be a pull rope 33, and the pull rope 33 is connected to the cantilever end of the sliding suspension 32. A third fixed pulley 16 is installed at the fixed end of the fixed suspension 31, and a fourth fixed pulley 17 is installed at the cantilever end of the sliding suspension 32. The pull rope 33 is wound around the third fixed pulley 16 and the fourth fixed pulley 17.

[0074] It should be noted that the length of the pull rope 33 between the third fixed pulley 16 and the fourth fixed pulley 17 should be able to ensure the normal telescopic movement of the sliding suspension 32.

[0075] The flood season pier scour depth measuring device further includes a stay rod 18. One end of the stay rod 18 is fixedly connected to the fixed suspension 31, and the other end is fixedly connected to the support 11.

[0076] A first limiting ring 19 is installed on the support 11, and a second limiting ring 20 is installed at the cantilever end of the sliding suspension 32. The measuring rope 12 is threaded through the first limiting ring 19 and the second limiting ring 20.

[0077] The pulse counter includes:

[0078] A magnet 21, and the magnet 21 is installed on the side wall of the first fixed pulley 2;

[0079] A Hall switch 22, and the Hall switch 22 is installed on the support 11, and the detection end of the Hall switch 22 is arranged corresponding to the position of the magnet 21. The Hall switch 22 is electrically connected to the counter in the control box 14;

[0080] Wherein, the base body 1 is provided with an aviation plug interface 23 which is electrically connected to the Hall switch 22, the motor 5, the torque sensor 6, and the electromagnetic clutch 8. The control box 14 is electrically connected to the aviation plug interface 23.

[0081] The arrangement quantity of the magnet 21 can be adjusted according to the precision requirement. Here, when the quantity of the magnet 21 increases, the measurement precision can be increased and the step loss can be prevented.

[0082] Two hanging holes 101 are provided on the seat body 1. The steel wire of the double-hook wire tightener 24 is wound around the bridge pier 100, and the two hooks of the double-hook wire tightener 24 are respectively hung on the two hanging holes 101; a universal wheel 25 that is in rolling contact with the column 300 is provided on the seat body 1.

[0083] The specific usage steps of the present invention are as follows:

[0084] S1. Place the seat body on the column on the bearing platform plane, fix the measuring device and the bridge pier together by the double-hook wire tightener, and place the measuring hammer at the working position;

[0085] S2. Connect the control box to the aviation plug interface;

[0086] S3. Start the motor through the quick release button or the slow release button to release the measuring hammer. The measuring hammer falls freely under the action of gravity. After it descends to the bottom of the water, press the rising button, and record the two maximum torque change values during the process of the measuring hammer rising out of the water surface, as well as the number of turns of the first fixed pulley between the two maximum torsions, to complete the measurement of a certain point;

[0087] S4. After that, by dragging the pull rope on the telescopic frame, the length of the telescopic frame can be adjusted, and the seat body can be rotated to realize the water depth measurement of the measuring points within different directions and diameter ranges.

[0088] The beneficial effects of the present invention:

[0089] (1) For the measuring device of the present invention, the control box controls the rising and releasing of the measuring hammer, calculates the scouring depth in combination with the torque sensor and the pulse counter. The control box collects the torque collected by the torque sensor and the number of turns of the first fixed pulley collected by the pulse counter, and stores them in the control box for subsequent data processing. Among them, when the measuring rope is straightened and the measuring hammer "comes out of the mud", the torque is the largest at one moment; then the torque decreases. At the moment when the measuring hammer leaves the water surface, the buoyancy of the water disappears and the torque value increases again. Analyze the number of pulses between these two key points. Since the diameter of the first fixed pulley is known, the length of the measuring rope, that is, the water depth, can be deduced. The measuring hammer makes a free-fall motion during the descending process and is subjected to very little resistance. By taking the average value through multiple measurements, the measurement accuracy is improved.

[0090] (2) For the measuring device of the present invention, the hand-cranking component can be used by the measuring personnel for emergency when the battery power of the control box is insufficient. And if the measuring personnel have certain experience, it is also easy to find the two critical values of the torque change of the measuring hammer by hand-cranking, so as to obtain the water depth. Comparing with the experimental results controlled by the motor, compared with only using the motor drive method, the credibility of the measurement results can be improved. At the same time, the hand-cranking component has the advantages of simplicity and convenience.

[0091] (3) For the measuring device of the invention, the telescopic frame can ensure that the measured diameter range is adjustable, and the universal wheels on the seat body enable the measuring device to rotate 360° for measurement, so that the water depth of the measuring points in different directions and within different diameter ranges can be measured.

[0092] (4) For the measuring device of the invention, the electric device has a high degree of automation and can be extended to unattended monitoring in the future. The real-time data monitored is automatically transmitted to the memory and saved for a period of time, and then regularly taken back by the measuring personnel.

[0093] In this specification, the various embodiments are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and reference can be made to the description in the method part for the relevant parts.

[0094] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for measuring the scouring depth of bridge piers during flood season, characterized in that: include: A seat body (1), the seat body (1) being rotatably mounted on a column (300) on a base (200) of a bridge pier (100), a first fixed pulley (2) being mounted on a bracket (11) of the seat body (1), and a pulse counter for detecting the number of revolutions of the first fixed pulley (2) being provided on the bracket (11); A telescopic frame (3), the telescopic frame (3) being arranged on the seat body (1), and a second fixed pulley (4) being mounted on the telescopic end of the telescopic frame (3); A motor (5), wherein the motor (5) is fixed on the base (1); A torque sensor (6), the torque sensor (6) being fixed on the base (1), the input shaft of the torque sensor (6) being connected to the motor (5) via a first coupling (7); An electromagnetic clutch (8), wherein an input shaft of the electromagnetic clutch (8) is connected to an output shaft of the torque sensor (6) via a second coupling (9); A winding wheel (10), the winding wheel (10) being mounted on the base (1), the wheel axle of the winding wheel (10) being fixedly connected to the output shaft of the electromagnetic clutch (8), the measuring rope (12) on the winding wheel (10) being arranged around the first fixed pulley (2) and the second fixed pulley (4), the end of the measuring rope (12) being connected to a measuring hammer (13); A control box (14), the control box (14) being fixed on the base (1), the control box (14) being electrically connected to the pulse counter, the motor (5), the torque sensor (6), and the electromagnetic clutch (8).

2. The device for measuring the scouring depth of bridge piers during flood season according to claim 1, characterized in that: Also includes: A hand-cranked assembly (15) for manually controlling the rotation of the spinning wheel (10), the hand-cranked assembly (15) comprising: A driving sprocket (151), the driving sprocket (151) being mounted on the seat body (1) via a support seat (152), and a crank handle (153) being fixed on the wheel axle of the driving sprocket (151); A driven sprocket (154) is sleeved on the wheel shaft of the winding wheel (10), and the driven sprocket (154) is connected to the driving sprocket (151) via a transmission chain (155).

3. The device for measuring the scouring depth of bridge piers during flood season according to claim 1, characterized in that: The telescopic frame (3) comprises: A fixed suspension (31), wherein a fixed end of the fixed suspension (31) is fixedly connected to the seat body (1), and a sliding block is provided on the bottom end surface of the fixed suspension (31); A sliding suspension (32), wherein a sliding rail (321) is provided on the top surface of the sliding suspension (32), the sliding block is slidably connected to the sliding rail (321), and the second fixed pulley (4) is arranged on the cantilever end of the sliding suspension (32); A driving unit, the driving unit is arranged on the fixed suspension (31) and is used to drive the extension and retraction of the sliding suspension (32).

4. The device for measuring the scouring depth of bridge piers during flood season according to claim 3, characterized in that: The driving part is an electric push rod or an air cylinder or an oil cylinder fixed on the fixed suspension (31), and the telescopic end of the electric push rod or the air cylinder or the oil cylinder is fixed to the sliding suspension (32).

5. The device for measuring the scouring depth of bridge piers during flood season according to claim 3, characterized in that: The driving part is a pull rope (33), and the pull rope (33) is connected to the cantilever end of the sliding suspension (32).

6. The device for measuring the scouring depth of bridge piers during flood season according to claim 5, characterized in that: A third fixed pulley (16) is mounted on the fixed end of the fixed suspension (31), a fourth fixed pulley (17) is mounted on the cantilever end of the sliding suspension (32), and the pull rope (33) is wound around the third fixed pulley (16) and the fourth fixed pulley (17).

7. A flood season bridge pier scour depth measuring device according to any one of claims 3 to 6, characterized in that: It also includes an oblique support rod (18), one end of the oblique support rod (18) being fixedly connected to the fixed suspension (31), and the other end of the oblique support rod (18) being fixedly connected to the bracket (11).

8. A flood season bridge pier scour depth measuring device according to any one of claims 3 to 6, characterized in that: A first limiting ring (19) is installed on the bracket (11), a second limiting ring (20) is installed on the cantilever end of the sliding suspension (32), and the measuring rope (12) is inserted through the first limiting ring (19) and the second limiting ring (20).

9. A flood season bridge pier scour depth measuring device according to any one of claims 1 to 6, characterized in that: The pulse counter comprises: a magnet (21), the magnet (21) being mounted on a side wall of the first fixed pulley (2); A Hall switch (22), the Hall switch (22) being mounted on the bracket (11), and the detection end of the Hall switch (22) being arranged corresponding to the position of the magnet (21), and the Hall switch (22) being electrically connected to a counter in the control box (14); The seat body (1) is provided with an aviation plug interface (23) which is electrically connected to the Hall switch (22), the motor (5), the torque sensor (6), and the electromagnetic clutch (8); and the control box (14) is electrically connected to the aviation plug interface (23).

10. A flood season bridge pier scour depth measuring device according to any one of claims 1 to 6, characterized in that: The base body (1) is provided with two hanging holes (101); the steel wire of the double-hook tensioner (24) is wound around the bridge pier (100); and the two hooks of the double-hook tensioner (24) are respectively hung on the two hanging holes (101); and the base body (1) is provided with a universal wheel (25) that is in rolling contact with the column (300).

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