Device for measuring scouring depth of pier in flood season

Abstract

The invention discloses a device for measuring the scouring depth of a pier in a flood season, and relates to the technical field of riverbed scouring depth measurement, and the device comprises a seat body which is rotatably installed on a stand column, a first fixed pulley is installed on a support of the seat body, and the support is provided with a pulse counter used for detecting the number of turns of the first fixed pulley; the telescopic frame is arranged on the seat body, and a second fixed pulley is mounted at the telescopic end of the telescopic frame; the motor is fixed on the seat body; the torque sensor is fixed on the seat body, and an input shaft of the torque sensor is connected with the motor through a first coupler; an input shaft of the electromagnetic clutch is connected with an output shaft of the torque sensor through a second coupler; the winding wheel disc is installed on the seat body, a wheel shaft of the winding wheel disc is fixedly connected with an output shaft of the electromagnetic clutch, a measuring rope on the winding wheel disc is wound around the first fixed pulley and the second fixed pulley, and the tail end of the measuring rope is connected with a measuring hammer; and a control box. The device can effectively measure the local scouring depth around the pier.

Description

Technical Field

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

[0002] Cross-river bridges are an important part of the modern transportation network and are vital to the national economy and social development. After the bridge piers were built in the natural river channel, the water flow around the piers was severely disturbed, forming three-dimensional, non-steady-state water flow structures such as downwelling and horseshoe vortexes. These structures significantly increase the sand-carrying capacity of the water flow, resulting in local scouring of the riverbed around the piers. Especially when a major flood occurs during the flood season of the river, due to the large flow rate and fast flow rate, 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 destruction and death. Therefore, real-time monitoring of the local scouring depth around the piers is an important measure to ensure the safe operation of the bridge, and has been increasingly valued by the bridge authorities.

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

[0004] Figure 1 The structure diagram of the embedded local scour depth monitoring device in the prior art is shown. In this device, the scour depth sensor 26 is embedded in the riverbed 400 around the bridge pier 100. The sensor types include fiber Bragg grating, time domain reflectometer, piezoelectric sensor, etc. The main advantage of the embedded scour depth monitoring device is that the scour depth sensor can accurately and reliably sense the change of riverbed elevation, thereby providing accurate scour depth information. However, its disadvantages are also quite significant: first, embedding the sensor in the riverbed requires underwater excavation, piling and other underwater operations; second, the anchoring strength of the sensor embedded in the riverbed is limited. During the flood period of large rivers, it is easy to be uprooted by the flood and lose the monitoring ability; third, there is a large-scale movement of bedload on the surface of the riverbed during the flood period, and the pebbles 27 with larger particle sizes are easy to damage the scour depth sensor; finally, the embedded local scour depth monitoring device can only measure the scour depth of a single point. If a large-area monitoring around the bridge pier is required, multiple sets of devices need to be installed, and the economic investment is significantly increased.

[0005] Figure 2The structure diagram of the contact type local scour depth monitoring device in the prior art is shown. This device fixes the scour depth sensor 26 through the connecting frame 29 anchored on the bridge pier 100. The bottom of the sensor contacts the surface of the riverbed 400 and descends with the scouring of the riverbed. The sensor types include gravity detection rods, gravity piezoelectric sensors, etc. The contact type scour depth monitoring device can accurately and reliably sense the changes in the riverbed elevation due to scouring. Its main disadvantages are: first, it is difficult for the contact type local scour depth monitoring device to monitor the process of riverbed lifting due to siltation; second, in order to prevent the scour depth sensor from being washed away by floods, it is necessary to open multiple deep holes on the bridge pier to anchor the connecting frame 29, which involves underwater drilling, installation and other operations, which is extremely difficult; at the same time, drilling itself may cause damage to the bridge pier, so it is usually not allowed by the bridge management department; third, the pebbles 27 on the surface of the riverbed during floods are easy to damage the measuring instrument; finally, a single set of contact type local scour depth measuring device can only monitor the scour depth of a single point.

[0006] Figure 3 The structure diagram of a non-contact scour depth monitoring device disclosed in patent CN102087360A is shown. In this device, a connecting frame 29 is set up on a bridge pier 100 above the water surface, and a scour depth sensor 26 is installed on the bracket, and the sensor is submerged under the water surface. The sensor type is an ultrasonic rangefinder. The existing non-contact scour depth monitoring device can avoid underwater operation. By installing multiple sensors on the bracket and using a rotating bracket, the scour depth of multiple measuring points upstream and downstream of the bridge pier can be measured to improve the monitoring efficiency. However, there are also several key defects: First, the propagation speed of ultrasound in water is affected by factors such as temperature and sediment concentration. 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 propagation distance and sediment concentration in the water. However, natural rivers often have the dual characteristics of deep water and high sediment concentration during the flood season, which makes the signal of the ultrasonic rangefinder very weak during the flood season, making it difficult to measure reliable scour depth data. Third, there are often a large number of floating objects such as weeds 500 on the surface of natural rivers during the flood season. When these floating objects are attached to the bracket and the sensor, not only will the sensor fail, but the entire measuring device may also be damaged. Fourth, in order to fix the bracket on the bridge pier, it is usually necessary to open a hole in the bridge pier, which is difficult to obtain permission from the bridge management department. Fifth, since the bracket 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 require underwater operations and drilling holes on bridge piers, which are technically difficult and subject to regulatory constraints. At the same time, natural rivers have fast flow rates, deep water, high sediment concentrations, floating objects on the surface, and a large number of pebbles moving at the bottom during the flood season, which can easily destroy or crash the monitoring device or make the scour depth sensor ineffective. Thirdly, the existing non-contact local scour depth monitoring devices do not take into account the changes in the propagation speed of sound waves with water flow conditions, and the error is large. Finally, the existing devices can only monitor the local area around the bridge piers, and the monitoring efficiency is low. The above 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, which seriously restricts the improvement of my country's bridge maintenance and management level. Summary of the invention

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

[0009] In order to achieve the above object, the present invention adopts the following technical solution:

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

[0011] A seat body, the seat body is rotatably mounted on a column on the pedestal of the pier, a first fixed pulley is mounted on a bracket of the seat body, and a pulse counter for detecting the number of revolutions of the first fixed pulley is provided on the bracket;

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

[0013] A motor, wherein the motor is fixed on the base;

[0014] A torque sensor, wherein the torque sensor is fixed on the seat, and an input shaft of the torque sensor is connected to the motor via a first coupling;

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

[0016] A winding wheel, the winding wheel is mounted on the base, the axle of the winding wheel is fixedly connected to the output shaft of the electromagnetic clutch, the measuring rope on the winding wheel is arranged around the first fixed pulley and the second fixed pulley, and the end of the measuring rope is connected to a measuring hammer;

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

[0018] It can be known from the above technical scheme that, compared with the prior art, the present invention discloses a device for measuring the scouring depth of bridge piers during flood season, which adjusts the length of the telescopic frame to a suitable position, controls the motor to rotate forward through the control box, drives the winding wheel to rotate, and under the action of the measuring hammer, the measuring rope and the measuring hammer sink rapidly and fall into the mud or silt at the bottom of the water, and then controls 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 "come out of the mud", and then the measuring hammer slowly rises in the water, the torque decreases, and the buoyancy of the water disappears at the moment when the measuring hammer leaves the water surface, and the torque value increases again. The torque sensor records the moments when the torque values ​​increase at these two times. At the same time, the pulse counter calculates the number of revolutions 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 and measure the next measuring point.

[0019] Therefore, the device adopts a horizontally rotatable base and a telescopic frame with adjustable length to achieve the effects of rotational measurement and adjustable measuring diameter around the bridge piers, and cooperates with a pulse counter to realize the convenient measurement of the scour depth around the bridge piers, effectively avoiding the local scour monitoring devices in the prior art that usually need to operate underwater and drill holes on the bridge piers, which are technically difficult and subject to regulatory constraints; at the same time, natural rivers have fast flow rates, deep water, high sediment concentrations, floating objects on the surface, and a large number of pebbles moving at the bottom during the flood season, which can easily destroy or crash the monitoring device or render the scour depth sensor ineffective; thirdly, the existing non-contact local scour depth monitoring device does not take into account the changes in the sound wave propagation speed with the water flow conditions, and the error is large; finally, the existing device can only monitor the local area around the bridge piers, and has the problem of low monitoring efficiency.

[0020] Furthermore, it also includes: a hand-crank assembly for manually controlling the rotation of the winding wheel, the hand-crank assembly includes:

[0021] A driving sprocket, the driving sprocket is mounted on the seat body through a supporting seat, and a crank is fixed on the wheel shaft of the driving sprocket;

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

[0023] The beneficial effects of the above technical solution are: the hand-cranked assembly can be used by surveyors in an emergency when the battery of the control box is low, that is, the power supply of the electromagnetic clutch is cut off through the control box, so that the drive motor no longer drives the winding wheel, and then the measuring hammer is released and raised by the crank. Moreover, if the surveyor has a certain amount of experience, it is 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 and compare it with the experimental results of motor control. Compared with only using motor drive, the credibility of the measurement results can be improved. At the same time, the hand-cranked assembly has the advantages of being simple and convenient.

[0024] Furthermore, the telescopic frame comprises:

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

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

[0027] A driving unit is arranged on the fixed suspension and is used to drive the extension and retraction of the sliding suspension.

[0028] The beneficial effect of adopting the above technical solution is that the sliding suspension can be extended and retracted through the driving part, thereby achieving the adjustable measuring diameter.

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

[0030] The beneficial effect of adopting the above technical solution is that the automatic extension and retraction of the sliding suspension can be realized without manual operation, thus saving time and effort.

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

[0032] Furthermore, a third fixed pulley is installed on the fixed end of the fixed suspension, 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 effect of adopting the above technical solution is: the sliding suspension is pushed out manually, and when it is recovered, the sliding suspension can be retracted by manually pulling back the pull rope. This method uses manual operation to achieve the extension and retraction of the sliding suspension, avoiding the increase in device cost caused by the use of electric push rods, air cylinders or oil cylinders.

[0034] Furthermore, it also includes an oblique support rod, one end of which is fixedly connected to the fixed suspension, and the other end of which is fixedly connected to the bracket.

[0035] The beneficial effect of adopting the above technical solution is that the setting of the diagonal support rod plays a role in bearing stress, preventing the measuring hammer from damaging the bracket when falling.

[0036] Furthermore, 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 passed 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 the measuring rope passes around the first fixed pulley and the second fixed pulley.

[0038] Further, the pulse counter comprises:

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

[0040] A Hall switch, the Hall switch is mounted 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] Among them, the seat body is provided with an aviation plug interface which is electrically connected to the Hall switch, the motor, the torque sensor and the electromagnetic clutch, and the control box is electrically connected to the aviation plug interface.

[0042] The beneficial effect of the above technical solution is that when the magnet passes through 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 to obtain the number of turns of the first fixed pulley. Here, the setting of the aviation plug interface can facilitate the loading and unloading of the control box and the pulse counter, motor, torque sensor, and electromagnetic clutch, so that the staff can charge the control box, etc.

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

[0044] The beneficial effects of adopting the above technical solution are: the setting of the double-hook tensioner facilitates the rapid disassembly and assembly of the device and the bridge pier, avoiding the defect of the existing measuring device that requires drilling holes on the bridge pier and destroying the bridge pier structure before installing the measuring device; and the universal wheel also facilitates the rotation and adjustment of the device on the column. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[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 schematic diagram of the structure 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 local scour depth monitoring device in the prior art;

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

[0050] Figure 5 It is a structural schematic diagram of a device for measuring the scour depth of bridge piers during flood season according to the present invention;

[0051] Figure 6 for Figure 5 A schematic diagram of the structure of the enlarged part A in the middle;

[0052] Figure 7 for Figure 5 A schematic diagram of the structure of the middle part B;

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

[0054] Fig. 9 The schematic diagram of the control box. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] like Figure 4-Figure 9 As shown, the embodiment of the present invention discloses a device for measuring the scouring depth of bridge piers during flood season, comprising:

[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] A sliding suspension 32, a sliding rail 321 is provided on the top surface of the sliding suspension 32, a sliding block is slidably connected to the sliding rail 321, and a second fixed pulley 4 is provided on the cantilever end of the sliding suspension 32;

[0071] The driving unit is arranged on the fixed suspension 31 and is used for driving the extension and retraction of the sliding suspension 32 .

[0072] 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. The present invention preferably uses an electric push rod, so there is no need to equip an additional air source and hydraulic oil source.

[0073] Of course, the driving part of the present invention can also be a pull rope 33, and the pull rope 33 is connected to the cantilever end of the sliding suspension 32. The third fixed pulley 16 is installed on the fixed end of the fixed suspension 31, and the fourth fixed pulley 17 is installed on 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 that the sliding suspension 32 can be normally extended and retracted.

[0075] The device for measuring the scouring depth of bridge piers during flood season further comprises an oblique brace 18 , one end of which is fixedly connected to the fixed suspension 31 , and the other end of which is fixedly connected to the bracket 11 .

[0076] 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 passed through the first limiting ring 19 and the second limiting ring 20 .

[0077] The pulse counter includes:

[0078] A magnet 21, wherein the magnet 21 is mounted on a side wall of the first fixed pulley 2;

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

[0080] 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 .

[0081] The number of magnets 21 can be adjusted according to the accuracy requirement. Here, increasing the number of magnets 21 can increase the measurement accuracy and prevent step loss.

[0082] The seat 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 ; the seat body 1 is provided with a universal wheel 25 which is in rolling contact with the column 300 .

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

[0084] S1. Place the seat on the column on the platform plane, fix the measuring device and the bridge pier together with a double hook tensioner, and place the measuring hammer in the working position;

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

[0086] S3, start the motor by the quick release button or the slow release button, release the measuring hammer, let the measuring hammer fall freely under the action of gravity, and after it drops to the bottom of the water, press the rising button, and record the two maximum torque change values ​​of the measuring hammer in the process of rising to the surface of the water, 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. Afterwards, 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 achieve water depth measurement of measuring points in different directions and diameter ranges.

[0088] Beneficial effects of the present invention:

[0089] (1) In the measuring device described in the present invention, the control box controls the rise and release of the measuring hammer, and 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. The measuring rope is straightened and the measuring hammer "comes out of the mud", and the torque is maximum for a moment; then the torque decreases, and the buoyancy of the water disappears at the moment the measuring hammer leaves the water surface, and the torque value increases again. By analyzing 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 calculated. The measuring hammer performs free fall motion during the descent process, and the resistance it encounters is very small. The average value is taken through multiple measurements to improve the measurement accuracy.

[0090] (2) The hand-cranked assembly of the measuring device of the present invention can be used by the measuring personnel in an emergency when the battery of the control box is low. If the measuring personnel have a certain amount of experience, they can easily find the two critical values ​​of the torque change of the measuring hammer by hand-cranking, thereby obtaining the water depth and comparing it with the experimental results of the motor control. Compared with using only the motor drive method, the credibility of the measurement results can be improved. At the same time, the hand-cranked assembly has the advantage of being simple and convenient.

[0091] (3) The measuring device of the invention has a retractable frame that ensures that the measuring diameter range is adjustable, and the universal wheels on the base body enable the measuring device to rotate 360° for measurement, thereby realizing water depth measurement at measuring points in different directions and diameter ranges.

[0092] (4) The measuring device described in the invention has a high degree of automation in the electric device, and can be expanded to unmanned monitoring in the future. The real-time data monitored is automatically transmitted to the storage device and stored for a period of time, and then the data is brought back by the measuring personnel at regular intervals.

[0093] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0094] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may 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 rather to 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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