A foundation pile detection device using an acoustic wave transmission method

Abstract

The present invention relates to a foundation pile detection device using an acoustic wave transmission method, comprising at least two take-up mechanisms, wherein the take-up mechanism comprises a take-up drum, which is used to rotate around its own axis to reel in and out a cable, thereby lifting and lowering a transducer at the end of the cable in an acoustic detection tube, and the take-up mechanism further comprises a power unit that drives the take-up drum to work; the take-up drum comprises a central axis structure and an outer cylinder body that are arranged separately; the take-up drum further comprises a clutch connection structure, which is used to connect the central axis structure and the outer cylinder body so that the central axis structure and the outer cylinder body rotate synchronously, and the clutch connection structure is also used to disconnect the central axis structure and the outer cylinder body so that the outer cylinder body can rotate relative to the central axis structure, thereby adjusting the relative depth of each transducer; the foundation pile detection device using the acoustic wave transmission method further comprises a controller, which is used to control the synchronous action of the power units of each take-up mechanism to drive each transducer to rise and fall synchronously when each clutch connection structure is connected to the corresponding central axis structure and the outer cylinder body.

Description

Technical Field

[0001] The present invention relates to the technical field of pile integrity detection, and more particularly to a pile integrity detection device using an acoustic wave transmission method. Background Art

[0002] Pile foundations are a common form of deep foundation, consisting of foundation piles and a cap connected to the top of the piles. Based on the construction method, they can be divided into precast piles and cast-in-place piles. Cast-in-place piles are made by drilling holes mechanically or manually at the pile location on the construction site, inserting a steel reinforcement skeleton, and then pouring concrete into the holes. The quality of a pile is often tested and determined using a variety of methods, among which the acoustic wave transmission method is one of the most commonly used methods. The acoustic wave transmission method can detect defects in the cast-in-place pile body and their location, and determine the integrity of the pile body. It has the advantages of not being limited by pile length, not requiring pile head treatment, having no blind spots in the test results, being accurate and reliable, allowing for quantitative analysis of defects, and intuitive, simple data analysis that is less prone to misjudgment.

[0003] The ultrasonic testing tube is an essential component of the cast-in-place pile inspection process. It serves as the channel through which the probe enters the pile during ultrasonic testing and is a crucial component of the cast-in-place pile ultrasonic inspection system. For example, two ultrasonic testing tubes are connected by cables, each containing a transducer. One transducer transmits ultrasonic waves, while the other receives them. The integrity of the pile is assessed by measuring the relative changes in acoustic parameters such as time, frequency, and amplitude attenuation as the waves propagate through the concrete medium. During operation, the two transducers are first lowered to the same depth at the bottom of the tubes, and then the cables are raised to synchronize their rise to complete the inspection.

[0004] In traditional detection methods, the lifting of cables requires manual operation, and the lifting rate of each cable cannot be guaranteed to be consistent, affecting the accuracy of the data. To address this problem, the utility model patent with the authorization announcement CN210775339U discloses a pile foundation ultrasonic detection system, including a fixed pulley mounted on each acoustic detection tube, a cable wound around the fixed pulley, and a transducer mounted at the end of the cable; the pile foundation ultrasonic detection system also includes a wire take-up mechanism that drives the transducers at the ends of each cable to rise and fall, and the wire take-up mechanism includes a wire take-up drum and a power unit that drives the wire take-up drum to rotate. Among them, the fixed pulleys are the first and second fixed pulleys in the patent, the cables are the transmitting and receiving measurement lines in the patent, the wire take-up mechanism is the winding mechanism in the patent, the wire take-up drums are the first and second reels in the patent, and the power unit is the first and second motors in the patent.

[0005] During use, the power unit drives the take-up drum to rotate forward and reverse to reel in and release the cable, thereby driving the transducer to rise and fall within the acoustic detection tube. As long as the power units are synchronized, the transducers can be raised simultaneously. In the prior art, to ensure synchronization of the power units, a controller is usually deployed to control the simultaneous start and stop of each power unit; or, as in the utility model patent with authorization publication number CN216847622U, a single roller is used to simultaneously reel in the cables in each acoustic detection tube, thereby achieving synchronous pulling of the cables.

[0006] Ideally, the initial depth of each transducer in its respective acoustic detection tube is equal. By controlling the synchronous operation of each power unit, it is possible to ensure that each transducer rises synchronously and remains at the same depth. However, in actual use, it is found that the initial depth of each transducer in its respective acoustic detection tube cannot be consistent. The reason is that the distance between each take-up reel and the corresponding acoustic detection tube is the same, but the initial winding amount of each cable on the corresponding take-up reel is different, that is, the distance between the end of each cable and the acoustic detection tube is different; or the initial winding amount of each cable on the corresponding take-up reel is the same, but the distance between each take-up reel and the corresponding acoustic detection tube is different. These reasons will cause the initial depth of each transducer in its respective acoustic detection tube to be inconsistent. Even if each transducer can rise synchronously, each transducer cannot always be at the same depth, and the accuracy of the collected data is poor. Summary of the Invention

[0007] The present invention provides a foundation pile detection device using an acoustic wave transmission method, which solves the technical problem in the prior art that when transducers are synchronously raised and lowered, their initial depths in corresponding acoustic detection pipes are different and difficult to adjust.

[0008] To solve the above problems, the present invention provides a foundation pile detection device using an acoustic wave transmission method, which adopts the following technical solution: a foundation pile detection device using an acoustic wave transmission method, comprising:

[0009] At least two take-up mechanisms, each of which includes a take-up drum configured to rotate about its own axis to retract and release the cable, thereby raising and lowering the transducer at the end of the cable within the acoustic detection tube, and further comprising a power unit that drives the take-up drum;

[0010] The take-up drum includes a central axis structure and an outer cylinder body arranged separately, the central axis structure is connected to the power unit, and the outer cylinder body is used to retract and release the cable;

[0011] The take-up reel further includes a clutch connection structure for connecting the central axis structure and the outer cylinder so that the central axis structure and the outer cylinder rotate synchronously, and the clutch connection structure is also used to disconnect the central axis structure and the outer cylinder so that the outer cylinder can rotate relative to the central axis structure to adjust the relative depth of each transducer;

[0012] The acoustic wave transmission method pile detection device also includes a controller, which is used to control the synchronous action of the power units of each take-up mechanism to drive the synchronous lifting and lowering of each transducer when each clutch connection structure is connected to the corresponding central axis structure and the outer cylinder.

[0013] The beneficial effect is that the power unit can drive each take-up drum to rotate, and each take-up drum is wound with a cable. Each cable does not share a take-up drum and can be wound up separately. When the depths of the transducers in the acoustic detection tube are different, the connection between the central axis structure and the outer cylinder in at least one take-up mechanism is disconnected, so that the central axis structure and the outer cylinder of the take-up mechanism can rotate relative to each other, and then the central axis structure is fixed and the outer cylinder is rotated to separately retract and release the cable corresponding to one of the take-up mechanisms, thereby adjusting the depth of the transducer and finally making each transducer at the same depth. Subsequently, the controller controls the power units of each take-up mechanism to work synchronously to complete the synchronous ascent of each transducer, and completes the detection during the ascent. The acoustic wave transmission method foundation pile detection device of the present invention not only ensures the synchronous rotation of each take-up drum, but also can rotate the take-up drum separately to complete the adjustment of the transducer depth, thereby ensuring the accuracy of the collected data.

[0014] As a further improvement, the clutch connection structure includes a plurality of grooves uniformly distributed circumferentially on the inner wall of the outer cylinder, and the clutch connection structure also includes a rotation-stopping arm slidably assembled on the central axis structure along the radial direction of the outer cylinder;

[0015] The sliding stroke of the anti-rotation stop arm has an anti-rotation position and a separation position. When the anti-rotation stop arm is in the anti-rotation position, it is inserted into the groove and cooperates with the groove wall of the groove along the circumference of the outer cylinder to achieve the anti-rotation assembly of the central axis structure and the outer cylinder. When the anti-rotation stop arm is in the separation position, it is separated from the groove so that the outer cylinder can rotate relative to the central axis structure.

[0016] The clutch connection structure further comprises a retaining component, which is used to retain the anti-rotation blocking arm in the anti-rotation position.

[0017] As a further improvement, the retaining component is a spring provided on the central axis structure, and the spring is used to apply a radially outward elastic force to the anti-rotation arm;

[0018] The stop arm and / or the groove have reversing inclined surfaces on both sides of the outer cylinder in the circumferential direction, so as to drive the stop arm to slide radially inward to separate from the groove when the central axis structure is fixed and the outer cylinder is rotated. The spring applies an elastic force to the stop arm. When the central axis structure is fixed and the outer cylinder is rotated, the stop arm can exert a reverse force on the spring through the cooperation of the reversing inclined surfaces, thereby causing the stop arm to retract radially inward, thereby separating the stop arm from the outer cylinder. After the spring is provided, the stop arm can be automatically extended and retracted, without the operator having to operate the central axis structure, making it more convenient to use.

[0019] As a further improvement, the central axis structure includes a central tube and a central column provided on the power unit, wherein the central column is located in the central tube and is coaxially arranged with the central tube;

[0020] The anti-rotation arm is installed on the wall of the central tube along the radial direction of the central tube, and the two ends of the spring are elastically pressed between the inner end of the anti-rotation arm and the central column. The inner end of the spring presses or is fixed on the central column, and the installation method of the spring is relatively simple.

[0021] As a further improvement, the central axis structure includes a central cylinder provided on the power unit, and the anti-rotation arm is installed on the cylinder wall of the central cylinder along the radial direction of the central cylinder. Since the anti-rotation arm is installed on the cylinder wall of the central cylinder, it is more convenient to install the anti-rotation arm and the retaining component.

[0022] As a further improvement, the acoustic wave transmission method pile detection device includes a depth monitoring structure corresponding to each take-up mechanism, and the depth monitoring structure is used to monitor the depth of the corresponding cable front end transducer in the acoustic detection tube.

[0023] As a further improvement, the depth monitoring structure includes a meter, the meter includes a meter wheel, and the cable is wound around the meter wheel;

[0024] The meter counter and the corresponding wire take-up mechanism are arranged on the same bracket. The wire take-up drum, the power unit and the meter counter are installed on the same bracket, which is easy to realize modular design.

[0025] As a further improvement, the acoustic wave transmission method pile detection device includes a support platform and at least two brackets arranged on the support platform, each bracket is provided with the winding mechanism;

[0026] Each bracket can be rotated around an axis extending up and down and assembled on the support platform. The bracket is rotatably assembled on the support platform. No matter where the support platform is placed, the bracket can ensure that the cable is arranged directly in front of the acoustic detection pipe and the transducer below, making it more convenient to use.

[0027] As a further improvement, the support platform includes at least two rotating joints that rotate about their own axes. The rotating joints are provided with slots, and the bracket is locked and inserted into the slots of the corresponding rotating joints. The locking engagement between the bracket and the rotating joints facilitates disassembly and installation, and is easy to carry after disassembly.

[0028] As a further improvement, the bracket includes a mounting base provided on the support platform and a working arm telescopically mounted on the mounting base. The wire take-up reel and power unit are mounted on the corresponding working arm. The working arm is telescopically mounted on the mounting base and can be adjusted according to the placement of the support platform and the height of the acoustic detection tube, providing greater versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an illustrative and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0030] Figure 1 2. It is a schematic structural diagram of a foundation pile detection device using an acoustic wave transmission method according to the present invention;

[0031] Figure 2 yes Figure 1 Schematic diagram of the middle support platform;

[0032] Figure 3 yes Figure 1 Schematic diagram of the front of the middle lifting counting part;

[0033] Figure 4 yes Figure 1 Schematic diagram of the reverse side of the lifting counting part;

[0034] Figure 5 It is a schematic diagram of the working arm, meter counter, central shaft structure and outer cylinder in the lifting and counting part assembled together;

[0035] Figure 6 It is a schematic diagram of the outer cylinder in the lifting counting part;

[0036] Figure 7 It is a schematic diagram of the working arm, meter counter and central axis structure in the lifting and counting part assembled together;

[0037] Figure 8 It is a schematic diagram of the meter counter in the lifting and counting section;

[0038] Figure 9 It is a schematic diagram of the central axis structure of the lifting counting part;

[0039] Figure 10 It is a schematic diagram of the pile foundation detection device using the acoustic wave transmission method of the present invention when in use.

[0040] Explanation of the accompanying reference numerals: 100, support platform; 101, operation panel; 102, rotary joint; 103, pulley; 104, panel support leg; 105, host bracket; 106, controller; 200, lifting and counting part; 201, base; 202, working arm; 203, meter counter; 204, central axis structure; 205, outer cylinder; 206, hexagonal seat; 207, telescopic rod; 208, central cylinder; 209, anti-rotation arm; 210, central column; 211, spring; 212, engaging teeth; 213, cable; 214, transducer; 215, data transmission connector; 216, counting connector; 217, meter wheel; 300, host; 400, foundation pile; 500, acoustic detection tube. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0042] In the present invention, the cable is reeled and the transducers are raised and lowered by rotating the outer cylinder. The central axis structure and the outer cylinder in the take-up reel can be joined or disconnected to achieve relative rotation. When the central axis structure and the outer cylinder are joined, a controller controls the synchronous operation of the power units to achieve synchronous raising and lowering of the transducers. When the central axis structure and the outer cylinder are disconnected, the outer cylinder can be rotated independently to adjust the depth of at least one transducer individually, thereby maintaining the initial depth of each transducer at the same level.

[0043] After introducing the basic principles of the present invention, various non-limiting embodiments of the present invention are described in detail below. The numbers of any elements in the drawings are for illustration only and not for limitation, and any names are for distinction only and do not have any limiting meaning.

[0044] The principles and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0045] Example 1 of the acoustic wave transmission method pile detection device provided by the present invention:

[0046] like Figures 1 to 10 As shown, the acoustic wave transmission method pile detection device (hereinafter referred to as the detection device) mainly includes a support platform 100 and a lifting and counting part 200. In this embodiment, four lifting and counting parts 200 are arranged, and the four lifting and counting parts 200 are all installed on the support platform 100.

[0047] The structure of the support platform 100 is as follows Figure 2 As shown, the support platform 100 includes an operating panel 101, a rotary joint 102, a pulley 103, a panel leg 104, a host bracket 105 and a controller 106, wherein the operating panel 101 is a carrier for mounting the lifting and counting part 200, and the operating panel 101 is a rectangular plate. There are four rotary joints 102, and the four rotary joints 102 are respectively located at the four corners of the operating panel 101. The rotary joint 102 is embedded in the top surface of the operating panel 101, and the rotary joint 102 is rotatably mounted on the operating panel 101 around an axis extending up and down. There is a slot in the rotary joint 102, which is a hexagonal groove. The hexagonal groove can be adapted to be locked and plugged into the hexagonal seat 206 of the lifting and counting part 200, so that the lifting and counting part 200 can rotate 360 ​​degrees.

[0048] There are two pulleys 103 , which are rotatably mounted on one side of the short side of the operation panel 101 . When the support platform 100 moves, the pulleys 103 are supported on the ground, making it convenient for the inspection personnel to move the support platform 100 .

[0049] There are four panel legs 104, which support the operating panel 101. They are located at the four corners of the bottom of the operating panel 101. The panel legs 104 can be supported on the ground or on the foundation piles 400. The panel legs 104 are telescopic structures and can be adjusted in height according to the on-site foundation pile inspection conditions.

[0050] The host bracket 105 is installed on one long side of the operation panel 101 . The host bracket 105 can be stretched freely and can be pulled out from the operation panel 101 . After being pulled out, the host bracket 105 can support the host 300 .

[0051] The controller 106 is set on the top surface of the operation panel 101. The controller 106 has two switch buttons. The power lines connected to the motors of each lifting and counting part 200 are connected to the controller 106. The two switch buttons on the controller 106 control the motors of each lifting and counting part 200 to rotate clockwise and counterclockwise synchronously.

[0052] The structure of the lifting counting part 200 is as follows Figures 3 to 9As shown, the lifting and counting part 200 includes a base 201, a working arm 202, a meter counter 203, and a wire take-up reel. The base 201 includes a hexagonal seat 206 and a telescopic rod 207 fixed to the hexagonal seat 206. The hexagonal seat 206 can be inserted into the hexagonal groove of the rotary joint 102 to prevent rotation. The telescopic rod 207 includes a sleeve fixed to the hexagonal seat 206 and a rod inserted into the sleeve. Both the sleeve and the rod are hexagonal structures and can be inserted into the sleeve to prevent rotation. It should be noted that the rod can be freely stretched up and down within the sleeve. After the rod is raised and lowered into place, it is necessary to maintain the rod at a set height. Specifically, a screw is screwed onto the sleeve. After the rod is raised and lowered into place, the screw is used to tighten the rod. One end of the working arm 202 is fixedly mounted on the rod, and the working arm 202 as a whole forms a cantilever structure. Because the rod can be freely stretched from the sleeve, the overall height of the working arm 202 can be adjusted.

[0053] The take-up reel includes a central axis structure 204 and an outer cylinder 205. The central axis structure 204 is installed on the working arm 202 through a motor. In this embodiment, the motor is built into the working arm 202. Specifically, the central axis structure 204 includes a central cylinder 208. One end of the central cylinder 208 is fixed on the output shaft of the motor, and a central column 210 is coaxially fixed inside the central cylinder 208. Specifically, one end of the central cylinder 208 is fixed with a sealing plate, and the motor and the central column 210 are both fixed on the sealing plate. Two radial perforations are symmetrically provided on the cylinder wall of the central cylinder 208, and a stop arm 209 is installed in the radial perforation to guide the sliding assembly. The central cylinder 208 can drive the stop arm 209 to rotate. A spring 211 is installed between the stop arm 209 and the central column 210, and the spring 211 can apply an elastic force radially outward along the central cylinder 208 to the stop arm 209. Specifically, the central column 210 is a hexahedron, and mounting pins are fixed on two symmetrical side surfaces of the hexahedron. The ends of the spring 211 are fixedly sleeved on the mounting pins.

[0054] Among them, the circumferential side surfaces of the radial outer end of the stop arm 209 are inclined surfaces, which can drive the outer cylinder 205 to rotate. When the outer cylinder 205 is manually moved after fixing the center cylinder 208, the stop arm 209 can be driven to move radially inward, so that the outer cylinder 205 can rotate relative to the center cylinder 208.

[0055] The outer cylinder 205 is used to wind the cable 213. When the outer cylinder 205 rotates clockwise, it can reel in the cable 213 and lift the transducer 214 at the end of the cable 213. When the outer cylinder 205 rotates counterclockwise, it can release the cable 213 and lower the transducer 214 at the end of the cable 213. There is a center hole in the middle of the outer cylinder 205, and a circle of engaging teeth 212 are fixed on the wall of the center hole. The central axis structure 204 can extend into the center hole. A groove is formed between two adjacent engaging teeth 212, and the anti-rotation blocking arm 209 can extend into the groove; wherein, the engaging teeth 212 are triangular teeth, so that the circumferential groove walls of the groove are both reversing inclined surfaces. When the central axis structure 204 rotates, the anti-rotation blocking arm 209 and the engaging teeth 212 can drive the outer cylinder 205 to rotate.

[0056] A transducer 214 is mounted on one end of the cable 213; the other end of the cable 213 extends through the center hole of the outer cylinder 205 and is mounted on a data transmission connector 215. It should be noted that the cable 213 extending through the center hole of the outer cylinder 205 will rotate with the outer cylinder 205 during rotation. However, due to a certain degree of redundancy in the cable 213, the data transmission connector 215 is protected from twisting when mounted on the host 300. In other embodiments, a conductive slip ring can be mounted on the outer cylinder 205, with the cable 213 mounted on the outer layer of the conductive slip ring. A separate cable is then connected between the inner layer of the conductive slip ring and the host 300 for data transmission.

[0057] The meter counter 203 measures the length of the cable 213 passing through it, thereby converting it into the depth of the transducer 214. The meter counter 203 is fixedly mounted on the working arm 202, with the meter counter 203 and the central axis structure 204 mounted on opposite sides of the working arm 202. The structure of the meter counter 203 is conventional and will not be described in detail here. The meter counter 203 includes a meter wheel 217 at one end, around which the cable 213 passes. The cable 213 rotates during the lifting and lowering process, thereby completing the meter measurement. For example, if the meter counter 203 measures 10 meters of cable 213 passed through, and the distance between the meter counter 203 and the acoustic detection tube 500 (here, the distance is the length along the cable 213) is 5 meters, then the depth of the transducer 214 within the acoustic detection tube 500 is 5 meters. The meter counter 203 also includes a cable, one end of which is provided with a counting connector 216 , which can be connected to the host 300 so as to monitor the lowering depth of the transducer 214 in real time.

[0058] The present invention is used as follows: Based on the actual on-site testing environment, select an appropriate location for device installation. Adjust the panel legs 104 to the appropriate height. In this embodiment, the panel legs 104 are placed on the top surface of the foundation pile 400. Pull the mainframe bracket 105 out of the operation panel 101 to support and place the mainframe 300. Select a corresponding number of lifting and counting sections 200 based on the number of acoustic detection tubes 500. Place the base 201 of the lifting and counting section 200 on the rotary joint 102. Manually rotate the lifting and counting section 200 to the appropriate position based on the position of the acoustic detection tube 500, and adjust the height of the base 201. Connect the data transmission connector 215 and counting connector 216 of each lifting and counting section 200 to the mainframe 300. Connect the power cord of the motor in each lifting and counting section 200 to the controller 106. Place the transducer 214 at the end of the cable 213 in each lifting and counting section 200 down into the acoustic detection tube 500. The controller 106 controls the counterclockwise rotation of each central axis structure 204 to lower the transducers 214 to a certain depth. During the lowering process, the meter counter 203 monitors the depth of the lowering. After a period of lowering, the on-site personnel fix the central axis structure 204 and rotate the outer cylinder 205 counterclockwise, monitoring the depth of the transducers 214 using the meter counter 203, so that the transducers 214 at the ends of each cable 213 are at the same depth. The controller 106 then controls the clockwise rotation of each central axis structure 204 to synchronously raise each transducer 214. In this embodiment, when the stop arm 209 is inserted into the groove of the outer cylinder 205, the stop arm 209 is in the stop position; when the stop arm 209 is separated from the groove, the stop arm 209 is in the separation position.

[0059] In this embodiment, the motor on the working arm 202 constitutes a power unit for driving the take-up drum to rotate. In other embodiments, the power unit may be a hydraulic motor or other structure.

[0060] In this embodiment, the stop arm 209 on the central tube 208, a circle of grooves on the outer tube body 205, and the spring 211 that drives the stop arm 209 to slide radially outward together form a clutch connection structure connecting the central axis structure and the outer tube, and the spring 211 forms a retaining component that keeps the stop arm 209 inserted into the groove.

[0061] In this embodiment, the meter counter 203 constitutes a depth monitoring structure capable of monitoring the depth of the transducer 214 .

[0062] In this embodiment, the base 201 and the working arm 202 together form a bracket for mounting the take-up drum, the power unit and the depth monitoring structure. The hexagonal seat 206 forms a mounting seat mounted on the support platform 100.

[0063] It should be noted that when the power unit drives the take-up reel to rotate, the central axis structure drives the outer cylinder 205 to rotate through the relative blocking of the anti-rotation stop arm 209 and the groove. At this time, the outer cylinder 205 and the cable 213 and transducer 214 wound on the outer cylinder 205 are all used as loads. In actual design and use, by selecting springs 211 of different specifications or adjusting the pre-load of the spring 211, it is ensured that the anti-rotation stop arm 209 will not be compressed and retracted when the power unit drives the take-up reel to rotate.

[0064] Example 2 of the acoustic wave transmission method pile detection device provided by the present invention:

[0065] The main difference between it and Example 1 is:

[0066] In Example 1, the base 201 includes a mounting seat and a telescopic rod 207 , and the working arm 202 is mounted on the telescopic rod 207 , thereby being telescopically assembled on the mounting seat.

[0067] In this embodiment, the working arm is fixed on the mounting base and its height is not adjustable.

[0068] Example 3 of the acoustic wave transmission method pile detection device provided by the present invention:

[0069] The main difference between it and Example 1 is:

[0070] In Example 1, the support platform 100 includes four rotary joints 102 that rotate around their own axes. The rotary joints 102 are provided with slots, and the brackets are fixedly inserted into the slots of the corresponding rotary joints 102.

[0071] In this embodiment, the rotary joint is fixedly connected to the bracket, and the rotary joint rotates around its own axis. In other embodiments, the number of rotary joints is determined according to needs.

[0072] Example 4 of the acoustic wave transmission method pile detection device provided by the present invention:

[0073] The main difference between it and Example 1 is:

[0074] In Example 1, the acoustic wave transmission method pile detection device includes a support platform and a bracket rotatably mounted on the support platform.

[0075] In this embodiment, the brackets are fixedly mounted on the support platform and their angles are not adjustable. The number of brackets is determined by the number of acoustic detection tubes and the size of the support platform.

[0076] Example 5 of the acoustic wave transmission method pile detection device provided by the present invention:

[0077] The main difference between it and Example 1 is:

[0078] In Example 1, the depth monitoring structure includes a meter counter 203, which includes a meter wheel 217, around which a cable 213 is wound. During the process of retracting or extending the cable 213, the cable 213 drives the meter wheel 217 to rotate, thereby measuring the length of the cable passing through the meter wheel 217 and ultimately converting it into a depth value detected by the transducer 214. Furthermore, the meter counter 203 and the corresponding cable retraction mechanism are mounted on the same bracket.

[0079] In this embodiment, the meter counter 203 and the corresponding take-up mechanism can be arranged separately. For example, the meter counter 203 can be installed at the mouth of the acoustic detection tube 500, and the take-up mechanism can be arranged away from the acoustic detection tube 500. In other embodiments, the form of the depth monitoring structure can be modified. For example, a rotation angle sensor can be installed on the output shaft of the power unit to monitor the rotation angle of the power unit output shaft and convert the rotation angle information into depth information for the transducer. In other embodiments, the depth monitoring structure is eliminated, and in this case, a cable with a built-in size marking is required.

[0080] Example 6 of the acoustic wave transmission method pile detection device provided by the present invention:

[0081] The main difference between it and Example 1 is:

[0082] In Example 1, there are two stop arms 209, and the two stop arms 209 are evenly distributed along the circumference. The stop arms 209 can be inserted into the grooves in the outer cylinder 205. The stop is achieved by the circumferential stopping cooperation between the stop arms 209 and the grooves. The spring 211 applies elastic force to the stop arms 209 to keep the stop arms 209 in the state of being inserted into the grooves; when the central axis structure is fixed and the outer cylinder 205 is rotated, the outer cylinder 205 can overcome the action of the spring and push the stop arms 209 radially inward, so that the stop arms 209 are separated from the outer cylinder 205.

[0083] In this embodiment, the retaining member is a jackscrew threaded onto the center tube. The jackscrew extends axially along the center tube and secures the anti-rotation arm against the center tube. When the outer cylinder of the central axis structure needs to be separated, the jackscrew is rotated to separate the jackscrew from the anti-rotation arm. After the anti-rotation arm is inserted into the groove, the jackscrew is rotated to secure the anti-rotation arm, ensuring that the anti-rotation arm remains inserted into the groove.

[0084] Example 7 of the acoustic wave transmission method pile detection device provided by the present invention:

[0085] The main difference between it and Example 1 is:

[0086] In Example 1, the central axis structure includes a coaxial and relatively fixed central column and central tube, and one end of the spring is fixed on the central column.

[0087] In this embodiment, the spring and the center post are in a pressing relationship, not a connection. Specifically, a recessed groove is provided on the side of the center post, into which one end of the spring extends. In other embodiments, the center post is eliminated. In this case, to apply a radially outward elastic force to the anti-rotation arms, a spring can be fixedly mounted between the inner ends of the two anti-rotation arms in the following manner.

[0088] Example 8 of the acoustic wave transmission method pile detection device provided by the present invention:

[0089] The main difference between it and Example 1 is:

[0090] In Example 1, the anti-rotation blocking arm 209 is assembled on the wall of the central tube 208 by sliding along the radial direction of the central tube 208, and the anti-rotation blocking arm 209 is maintained in the state of being inserted into the groove by a retaining component.

[0091] In this embodiment, the stop arm can be disassembled and assembled on the wall of the center tube. Specifically, a radially extending threaded hole is opened on the wall of the center tube, and the stop arm is threaded into the threaded hole. When the center axis structure and the outer cylinder body need to be connected, the stop arm is rotated to insert the stop arm into the groove; when the center axis structure and the outer cylinder body need to be separated, the stop arm is rotated to separate the stop arm from the groove.

[0092] Example 9 of the acoustic wave transmission method pile detection device provided by the present invention:

[0093] The main difference between it and Example 1 is:

[0094] In Example 1, the central axis structure includes a central cylinder, and the anti-rotation arm is installed on the cylinder wall of the central cylinder.

[0095] In this embodiment, the central axis structure includes a central axis, and the connecting structure includes a connecting plate bolted to one end of the central axis. The connecting plate is also bolted to the end of the outer cylinder. To disconnect the central axis structure and the outer cylinder, the connecting plate can be separated from at least one of the central axis structure and the outer cylinder.

[0096] In other embodiments, the clutch connection structure includes a sleeve that fits over the center shaft. The sleeve's inner circumference is secured to the center shaft via splines, while the sleeve's outer circumference is secured to the outer cylinder via splines. Disconnecting the center shaft structure from the outer cylinder requires only the sleeve's removal.

[0097] Example 10 of the acoustic wave transmission method pile detection device provided by the present invention:

[0098] The main difference between it and Example 1 is:

[0099] In Example 1, each take-up mechanism is installed on the same support platform via a bracket.

[0100] In this embodiment, each wire-taking mechanism is arranged separately, that is, it is not fixedly connected into a whole through other structures such as a supporting platform.

[0101] Example 11 of the acoustic wave transmission method pile detection device provided by the present invention:

[0102] The main difference between it and Example 1 is:

[0103] In Example 1, the central axis structure includes a central tube, and the anti-rotation blocking arm is installed on the tube wall of the central tube along the radial direction of the central tube.

[0104] In this embodiment, the central shaft structure includes a central shaft having a groove defined in a side surface thereof, the inner end of the anti-rotation arm being slidably mounted in the groove, and a spring disposed between the bottom of the groove and the anti-rotation arm, the spring applying a radially outward elastic force to the anti-rotation arm. Alternatively, in other embodiments, a jackscrew is provided on the central shaft, and when the anti-rotation arm is inserted into the groove, the jackscrew acts to tighten the anti-rotation arm.

[0105] In addition, in the description of this specification, “a plurality of” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A foundation pile detection device using an acoustic wave transmission method, comprising: At least two take-up mechanisms, each of which includes a take-up drum configured to rotate about its own axis to retract and release the cable, thereby raising and lowering the transducer at the end of the cable within the acoustic detection tube, and further comprising a power unit that drives the take-up drum; It is characterized in that the take-up drum comprises a central axis structure and an outer cylinder body arranged separately, the central axis structure is connected to the power unit, and the outer cylinder body is used to retract and release the cable; The take-up reel further includes a clutch connection structure for connecting the central axis structure and the outer cylinder so that the central axis structure and the outer cylinder rotate synchronously, and the clutch connection structure is also used to disconnect the central axis structure and the outer cylinder so that the outer cylinder can rotate relative to the central axis structure to adjust the relative depth of each transducer; The acoustic wave transmission method pile detection device also includes a controller, which is used to control the synchronous operation of the power units of each take-up mechanism to drive each transducer to rise and fall synchronously when each clutch connection structure is connected to the corresponding central axis structure and the outer cylinder; The clutch connection structure includes a plurality of grooves uniformly distributed on the inner wall of the outer cylinder in the circumferential direction, and the clutch connection structure also includes a rotation-stopping arm slidably assembled on the central axis structure along the radial direction of the outer cylinder; The sliding stroke of the anti-rotation stop arm has an anti-rotation position and a separation position. When the anti-rotation stop arm is in the anti-rotation position, it is inserted into the groove and cooperates with the groove wall of the groove along the circumference of the outer cylinder to achieve the anti-rotation assembly of the central axis structure and the outer cylinder. When the anti-rotation stop arm is in the separation position, it is separated from the groove so that the outer cylinder can rotate relative to the central axis structure. The clutch connection structure further includes a retaining component, which is used to retain the anti-rotation arm in the anti-rotation position; The retaining component is a spring provided on the central axis structure, and the spring is used to apply a radially outward elastic force to the anti-rotation arm; The stop arm and / or the groove have reversing inclined surfaces on both sides of the outer cylinder in the circumferential direction, so as to drive the stop arm to slide radially inward to separate from the groove when the central axis structure is fixed and the outer cylinder is rotated.

2. The acoustic wave transmission method pile detection device according to claim 1, characterized in that: The central axis structure includes a central tube and a central column provided on the power unit, wherein the central column is located in the central tube and is coaxially arranged with the central tube; The anti-rotation blocking arm is installed on the wall of the central tube along the radial direction of the central tube, and the two ends of the spring are elastically pressed between the inner end of the anti-rotation blocking arm and the central column.

3. The acoustic wave transmission method pile detection device according to claim 1, characterized in that: The central axis structure comprises a central tube arranged on the power unit, and the anti-rotation blocking arm is installed on the tube wall of the central tube along the radial direction of the central tube.

4. The acoustic wave transmission method pile detection device according to any one of claims 1 to 3, characterized in that: The acoustic wave transmission method pile detection device includes a depth monitoring structure corresponding to each take-up mechanism, and the depth monitoring structure is used to monitor the depth of the corresponding cable front end transducer in the acoustic detection tube.

5. The acoustic wave transmission method pile detection device according to claim 4, characterized in that: The depth monitoring structure includes a meter counter, the meter counter includes a meter wheel, and the cable is wound around the meter wheel; The meter counter and the corresponding line-taking mechanism are arranged on the same bracket.

6. The acoustic wave transmission method pile detection device according to any one of claims 1 to 3, characterized in that: The acoustic wave transmission method pile detection device comprises a support platform and at least two brackets arranged on the support platform, each bracket being provided with the aforementioned take-up mechanism; Each bracket can be rotatably assembled on the supporting platform around an axis extending up and down.

7. The acoustic wave transmission method pile detection device according to claim 6, characterized in that: The support platform comprises at least two rotary joints rotating around its own axis, the rotary joints are provided with slots, and the bracket is fixedly inserted into the slots of the corresponding rotary joints.

8. The acoustic wave transmission method pile detection device according to claim 6, characterized in that: The bracket includes a mounting seat arranged on a supporting platform and a working arm telescopically assembled on the mounting seat, and the wire reel and the power unit are arranged on the corresponding working arm.

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