Clamping, positioning and driving integrated device for ultrasonic detection of steel strand

Abstract

The invention discloses a clamping, positioning and driving integrated device for ultrasonic detection of a steel strand, and relates to the technical field of nondestructive detection of the steel strand, the clamping, positioning and driving integrated device comprises a control module, and a clamping module, a positioning module and a transmission module which are electrically connected with the control module, the clamping module is used for clamping or loosening a steel strand under the control of the control module, the clamping module is installed on the transmission module, the transmission module is used for driving the clamping module to reciprocate under the control of the control module, the positioning module is used for detecting the position of the clamping module in real time, and the clamping module is installed on the transmission module. And a position signal of the clamping module is fed back to the control module. According to the invention, the integration of clamping, positioning and transmission of the steel strand can be realized, the positioning precision is high, and the detection efficiency and the detection precision are improved.

Description

Technical Field

[0001] This invention relates to the field of nondestructive testing technology for steel strands, and in particular to an integrated clamping, positioning, and driving device for ultrasonic testing of steel strands. Background Technology

[0002] As a core load-bearing component in engineering structures such as long-span bridges and prestressed concrete members, steel strands are made of multiple steel wires twisted together. They are susceptible to stress corrosion, wire breakage, and indentation damage due to long-term exposure to loads and environmental corrosion. If such damage is not detected and addressed promptly, it can easily lead to structural failure or even safety accidents. Therefore, efficient and accurate non-destructive testing of steel strands is crucial for ensuring the safe operation of engineering structures. Ultrasonic testing, due to its advantages such as strong penetration, high sensitivity, no ionizing radiation, and the ability to perform unilateral testing, has become the mainstream technology for non-destructive testing of steel strand damage. However, existing ultrasonic testing equipment and processes for steel strands often involve independent clamping, positioning, and transmission processes, requiring distributed operation. This results in a complex testing process and low efficiency, failing to meet the high-efficiency testing requirements of engineering sites. Furthermore, in the positioning stage, traditional positioning adjustments rely heavily on manual operation, using ruler measurements or visual alignment, which is highly dependent on human experience, leading to low positioning accuracy and directly affecting the testing accuracy.

[0003] Therefore, the aforementioned defects of existing devices seriously affect the detection efficiency and the reliability of the detection results, and there is an urgent need for an integrated device that combines clamping, positioning and transmission. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated clamping, positioning, and driving device for ultrasonic testing of steel strands, so as to solve the problems existing in the prior art, realize the integration of clamping, positioning, and transmission of steel strands, and achieve high positioning accuracy, thereby improving testing efficiency and accuracy.

[0005] To achieve the above objectives, the present invention provides the following solution: This invention provides an integrated clamping, positioning, and driving device for ultrasonic testing of steel strands, comprising a control module, a clamping module, a positioning module, and a transmission module electrically connected to the control module. The clamping module is used to clamp or release the steel strand under the control of the control module. The clamping module is mounted on the transmission module, and the transmission module is used to drive the clamping module to reciprocate under the control of the control module. The positioning module is used to detect the position of the clamping module in real time and feed back the position signal of the clamping module to the control module.

[0006] Preferably, the clamping module includes a clamping drive element and a three-jaw centering chuck. The three-jaw centering chuck is mounted on the transmission module. The clamping drive element is electrically connected to the control module. The clamping drive element is mounted on one side of the three-jaw centering chuck, and the clamping drive element is used to drive the three-jaw centering chuck to move and cause the three-jaw centering chuck to clamp or release the steel strand.

[0007] Preferably, the clamping drive element is a drive motor, and the output shaft of the drive motor is connected to the input end of the three-jaw centering chuck.

[0008] Preferably, the claws of the three-jaw centering chuck are made of an elastic material.

[0009] Preferably, the transmission module includes a transmission drive element and a linear motion mechanism. The transmission drive element is electrically connected to the control module, the transmission drive element is installed at the input end of the linear motion mechanism, and the output end of the linear motion mechanism is connected to the clamping module.

[0010] Preferably, the transmission drive element is a servo motor, and the linear motion mechanism includes a mounting housing, a ball screw assembly, a sliding block, several linear guides, and several guide sliders. The upper end of the mounting housing is open, the ball screw assembly is located inside the mounting housing, the servo motor is mounted on the outer wall of the mounting housing, one end of the ball screw assembly is connected to the output shaft of the servo motor via a coupling, and the other end of the ball screw assembly is rotatably connected to the inner wall of the mounting housing via a bearing. The sliding block is mounted on the outer periphery of the ball screw assembly, and the ball screw assembly can drive the sliding block to reciprocate along the length direction of the ball screw assembly under the drive of the servo motor. The clamping module is mounted on the sliding block, the linear guides are mounted on at least one side of the ball screw assembly, and the linear guides are parallel to the ball screw assembly. The guide sliders are all mounted on the lower end of the sliding block, and the guide sliders are slidably connected to the linear guides.

[0011] Preferably, there are two linear guides, which are located on both sides of the ball screw assembly, and each linear guide is provided with two guide sliders.

[0012] Preferably, the positioning module includes a mounting bracket and a laser displacement sensor. The lower end of the mounting bracket is located on both sides of the transmission module. The laser displacement sensor is installed in the middle of the upper end of the mounting bracket and is located above the transmission module. It is used to detect the displacement information of the steel strand. The detection axis of the laser displacement sensor is parallel to the axis of the steel strand.

[0013] Preferably, it further includes a housing and a frame, the frame being located at the bottom opening of the housing, the housing covering the outer periphery of the clamping module, the positioning module and the transmission module, the transmission module being mounted on the frame, and the control module being mounted on the outer wall of the housing.

[0014] Preferably, the lower end face of the frame is provided with a plurality of feet, which are detachably connected to each corner of the lower end face of the frame.

[0015] The present invention achieves the following technical effects compared to the prior art: The present invention provides an integrated clamping, positioning, and driving device for ultrasonic testing of steel strands, comprising a control module, and a clamping module, a positioning module, and a transmission module electrically connected to the control module. By integrating the clamping module, positioning module, and transmission module into a single device, repeated disassembly and assembly are eliminated, thereby improving testing efficiency. The clamping module is used to clamp or release the steel strand under the control of the control module to prevent the steel strand from shifting during testing, causing a shift in the testing reference and interfering with the effective acquisition of the ultrasonic testing signal. The clamping module is mounted on the transmission module, which is used to drive the clamping module to reciprocate under the control of the control module, thereby achieving stable reciprocating movement of the steel strand to perform non-destructive testing of the steel strand through the ultrasonic testing probe and obtain the damage status of the steel strand. The positioning module is used to detect the position of the clamping module in real time and feed back the position signal of the clamping module to the control module, improving the displacement detection accuracy and thus improving the positioning accuracy, avoiding cumulative errors during long-distance testing that would prevent the failure to meet the requirements of high-precision damage detection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the integrated clamping, positioning, and driving device for ultrasonic testing of steel strands in this invention. Figure 2 This is a schematic diagram of the internal structure of the integrated clamping, positioning, and driving device for ultrasonic testing of steel strands in this invention. Figure 3 This is a schematic diagram of the clamping module, positioning module, and transmission module in this invention; Figure 4 This is a schematic diagram of the transmission module in this invention; Figure 5 This is a schematic diagram of the clamping module in this invention; In the diagram: 1-Clamping module, 11-Claw, 12-Claw head, 13-Clamping drive element, 2-Transmission module, 21-Mounting housing, 22-Ball screw assembly, 23-Sliding block, 24-Linear guide rail, 25-Guide rail slider, 26-Transmission drive element, 27-Coupling, 28-Bearing, 3-Positioning module, 31-Mounting bracket, 32-Laser displacement sensor, 33-Sensor mounting plate, 4-Control module, 5-Housing, 6-Frame. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The purpose of this invention is to provide an integrated clamping, positioning, and driving device for ultrasonic testing of steel strands, so as to solve the problems existing in the prior art, realize the integration of clamping, positioning, and transmission of steel strands, and achieve high positioning accuracy, thereby improving testing efficiency and accuracy.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1-5 As shown, this embodiment provides an integrated clamping, positioning, and driving device for ultrasonic testing of steel strands. It includes a control module 4, and a clamping module 1, a positioning module 3, and a transmission module 2 electrically connected to the control module 4. By integrating the clamping module 1, positioning module 3, and transmission module 2 into a single device, repeated disassembly and assembly are eliminated, thereby improving testing efficiency. The clamping module 1 is used to clamp or release the steel strand under the control of the control module 4 to prevent the steel strand from shifting during testing, causing a shift in the testing reference and interfering with the effective acquisition of the ultrasonic testing signal. The clamping module 1 is mounted on the transmission module 2, and the transmission module 2 is used to drive the clamping module 1 to reciprocate under the control of the control module 4, thereby achieving stable reciprocating movement of the steel strand. This allows for non-destructive testing of the steel strand using an ultrasonic testing probe to obtain information on its damage. The positioning module 3 is used to detect the position of the clamping module 1 in real time and feed the position signal of the clamping module 1 back to the control module 4, improving displacement detection accuracy and thus positioning accuracy. This avoids cumulative errors during long-distance testing, preventing the inability to meet the requirements of high-precision damage detection.

[0022] Specifically, the clamping module 1 includes a clamping drive element 13 and a three-jaw centering chuck. The three-jaw centering chuck is mounted on the transmission module 2, enabling the transmission module 2 to move the steel strand via the three-jaw centering chuck. The clamping drive element 13 is electrically connected to the control module 4 and is mounted on one side of the three-jaw centering chuck. The clamping drive element 13 drives the three-jaw centering chuck to clamp or release the steel strand. The three jaws 11 of the three-jaw centering chuck are evenly arranged. By using the three-jaw centering chuck to clamp the steel strand, it is ensured that the three jaws 11 can move synchronously towards or away from the steel strand, ensuring that the clamping force at each clamping point is consistent. Furthermore, it can adapt to steel strands of different diameters. In this embodiment, the three-jaw centering chuck is preferably adapted to standard steel strands with a diameter of 12mm-25mm.

[0023] The clamping drive element 13 is a drive motor. The output shaft of the drive motor is connected to the input end of the three-jaw centering chuck, preferably through a gear set. As the drive motor rotates, the gear set drives the corresponding structure of the three-jaw centering chuck to rotate, ultimately completing the linear movement of the three jaws 11 in the direction of moving closer to or further away from each other.

[0024] The specific structure and principle of the three-jaw centering chuck are as follows: three jaws 11 are slidably connected to a fixed disk. A rotating disk is rotatably connected to the fixed disk on the side away from the jaws 11. A drive motor drives the rotating disk to rotate through a gear set. A spiral guide rail is provided on the rotating disk. Each jaw 11 is embedded in the spiral guide rail. The drive motor drives the rotating disk to rotate. As the rotating disk rotates, the spiral guide rail causes the three jaws 11 to move towards or away from each other, thereby achieving adaptive and stable clamping of the steel strand. The specific structure and principle of the three-jaw centering chuck used in this embodiment are consistent with the prior art.

[0025] The jaws 12 of the three-jaw centering chuck are preferably made of highly elastic rubber material to avoid damage to the surface of the steel strand. The jaws 12 have anti-slip textures to prevent loosening and displacement during the testing process. This ensures stable clamping of the steel strand while preventing surface damage, guaranteeing that the steel strand axis remains fixed and does not slip during testing. Furthermore, compared to traditional methods, no special clamps need to be replaced. Those skilled in the art can also adapt the specific material of the jaws 12 according to actual needs.

[0026] The transmission module 2 includes a transmission drive element 26 and a linear motion mechanism. The transmission drive element 26 is electrically connected to the control module 4. The transmission drive element 26 is installed at the input end of the linear motion mechanism, and the output end of the linear motion mechanism is connected to the clamping module 1. The transmission drive element 26 drives the linear motion mechanism to output power, thereby realizing the linear movement of the clamping module 1 and finally completing the movement of the steel strand.

[0027] The transmission drive element 26 is a servo motor. The linear motion mechanism includes a mounting housing 21, a ball screw assembly 22, a sliding block 23, several linear guides 24, and several guide sliders 25. The upper end of the mounting housing 21 is open. The ball screw assembly 22 is located inside the mounting housing 21. The servo motor is mounted on the outer wall of the mounting housing 21. One end of the ball screw assembly 22 is connected to the output shaft of the servo motor via a coupling 27. The other end of the ball screw assembly 22 is rotatably connected to the inner wall of the mounting housing 21 via a bearing 28. The ball screw assembly 22 is horizontally arranged. The sliding block 23 is mounted on the outer periphery of the ball screw assembly 22, and the ball screw assembly 22 can be driven by the servo motor. Driven by the motor, the sliding block 23 moves back and forth along the length of the ball screw assembly 22. The moving speed can be adjusted within the range of 0.2m / min-1m / min. At the same time, the ball screw assembly 22 enables uniform transmission of the steel strand. The clamping module 1 is installed on the sliding block 23, preferably fixed by bolts. The sliding block 23 can serve as a moving base to achieve one-time centering and synchronous driving. The linear guide rail 24 is installed on at least one side of the ball screw assembly 22 and is parallel to the ball screw assembly 22. The guide rail slider 25 is installed at the lower end of the sliding block 23 and is slidably connected to the linear guide rail 24.

[0028] There are two linear guides 24, which are located on both sides of the ball screw assembly 22. Each linear guide 24 is provided with two guide sliders 25.

[0029] The positioning module 3 includes a mounting bracket 31 and a laser displacement sensor 32. The lower end of the mounting bracket 31 is located on both sides of the transmission module 2. The laser displacement sensor 32 is installed in the middle of the upper end of the mounting bracket 31. Preferably, the laser displacement sensor 32 is installed on the mounting bracket 31 through a sensor mounting plate 33. The laser displacement sensor 32 is located above the transmission module 2 and close to the drive motor. The laser displacement sensor 32 is used to detect the displacement information of the steel strand to collect the moving distance data in real time and feed it back to the control module 4 to achieve high-precision continuous positioning. The detection axis of the laser displacement sensor 32 is parallel to the axis of the steel strand, and the positioning error of the laser displacement sensor 32 does not exceed ±1mm.

[0030] In this embodiment, the ball screw assembly 22 and the laser displacement sensor 32 work together to achieve precise positioning of the damaged location of the steel strand and automatic, uniform, continuous detection, reducing human error. Simultaneously, the integrated design combines clamping, positioning, and transmission functions, eliminating the need for step-by-step operations, simplifying the detection process, and improving detection efficiency. The overall device is compact, easy to install, and adaptable to the pre-reference requirements for steel strand detection in various scenarios such as bridges and prestressed components.

[0031] This embodiment also includes a housing 5 and a frame 6. The frame 6 is an integral frame with good structural stability. The frame 6 is welded from Q355 alloy steel and is located at the bottom opening of the housing 5. The housing 5 covers the outer periphery of the clamping module 1, the positioning module 3 and the transmission module 2. The transmission module 2 is installed on the frame 6, which can avoid vibration interference during transmission. At the same time, it forms a collaborative working system to ensure the accuracy of the detection signal and the efficiency of the detection process. The control module 4 is installed on the outer wall of the housing 5.

[0032] The lower end face of the frame 6 is provided with multiple feet, which can be detachably connected to the corners of the lower end face of the frame 6 to ensure that the whole is placed stably.

[0033] The usage method of this embodiment is as follows: In the construction of ultrasonic steel strand damage detection, the integrated clamping, positioning and driving device for ultrasonic detection of steel strand in this embodiment is fixed to the detection platform through the mounting hole at the bottom of the frame 6, and the parameters are preset by the control module 4; the crane or conveying mechanism transports the steel strand to the center position of the three-jaw centering chuck, and then the clamping function of the three-jaw centering chuck is activated, so that the drive motor drives the three jaws 11 of the three-jaw centering chuck to clamp the steel strand synchronously until the jaw head 12 of the jaw 11 is tightly attached to the steel strand; after the ultrasonic detection probe is installed in the probe mounting interface and the position is calibrated, the servo motor is started according to the detection requirements to drive the ball screw assembly 22 to drive the sliding block 23 to move linearly. At the same time, the cooperation between the guide rail slider 25 below the sliding block 23 and the linear guide rail 24 can effectively prevent the overturning moment and improve the stability of the device. In addition, the sliding block 23 drives the steel strand clamped by the three-jaw centering chuck, which also serves as the moving base, to move at a uniform speed. The laser displacement sensor 32 collects position data in real time and feeds it back to the control module 4. During the testing process, excessive external force should not be applied to the device to avoid deformation of the transmission module 2. After the test is completed, turn off the power, release the three jaws 11, remove the steel strand, and the testing operation is complete.

[0034] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A clamping, positioning, and driving integrated device for ultrasonic testing of steel strands, characterized in that: The device includes a control module, and a clamping module, a positioning module, and a transmission module electrically connected to the control module. The clamping module is used to clamp or release the steel strand under the control of the control module. The clamping module is mounted on the transmission module, and the transmission module is used to drive the clamping module to reciprocate under the control of the control module. The positioning module is used to detect the position of the clamping module in real time and feed back the position signal of the clamping module to the control module.

2. The integrated clamping, positioning, and driving device for ultrasonic testing of steel strands according to claim 1, characterized in that: The clamping module includes a clamping drive element and a three-jaw centering chuck. The three-jaw centering chuck is mounted on the transmission module. The clamping drive element is electrically connected to the control module. The clamping drive element is mounted on one side of the three-jaw centering chuck and is used to drive the three-jaw centering chuck to move and clamp or release the steel strand.

3. The integrated clamping, positioning, and driving device for ultrasonic testing of steel strands according to claim 2, characterized in that: The clamping drive element is a drive motor, and the output shaft of the drive motor is connected to the input end of the three-jaw centering chuck.

4. The integrated clamping, positioning, and driving device for ultrasonic testing of steel strands according to claim 2, characterized in that: The jaws of the three-jaw centering chuck are made of an elastic material.

5. The integrated clamping, positioning, and driving device for ultrasonic testing of steel strands according to claim 1, characterized in that: The transmission module includes a transmission drive element and a linear motion mechanism. The transmission drive element is electrically connected to the control module. The transmission drive element is installed at the input end of the linear motion mechanism, and the output end of the linear motion mechanism is connected to the clamping module.

6. The integrated clamping, positioning, and driving device for ultrasonic testing of steel strands according to claim 5, characterized in that: The transmission drive element is a servo motor. The linear motion mechanism includes a mounting housing, a ball screw assembly, a sliding block, several linear guides, and several guide sliders. The upper end of the mounting housing is open. The ball screw assembly is located inside the mounting housing. The servo motor is mounted on the outer wall of the mounting housing. One end of the ball screw assembly is connected to the output shaft of the servo motor via a coupling. The other end of the ball screw assembly is rotatably connected to the inner wall of the mounting housing via a bearing. The sliding block is mounted on the outer periphery of the ball screw assembly, and the ball screw assembly can drive the sliding block to reciprocate along the length direction of the ball screw assembly under the drive of the servo motor. The clamping module is mounted on the sliding block. The linear guides are mounted on at least one side of the ball screw assembly and are parallel to the ball screw assembly. The guide sliders are all mounted on the lower end of the sliding block and are slidably connected to the linear guides.

7. The integrated clamping, positioning, and driving device for ultrasonic testing of steel strands according to claim 6, characterized in that: There are two linear guides, which are located on both sides of the ball screw assembly, and each linear guide is provided with two guide sliders.

8. The integrated clamping, positioning, and driving device for ultrasonic testing of steel strands according to claim 1, characterized in that: The positioning module includes a mounting bracket and a laser displacement sensor. The lower end of the mounting bracket is located on both sides of the transmission module. The laser displacement sensor is installed in the middle of the upper end of the mounting bracket and is located above the transmission module. It is used to detect the displacement information of the steel strand. The detection axis of the laser displacement sensor is parallel to the axis of the steel strand.

9. The integrated clamping, positioning, and driving device for ultrasonic testing of steel strands according to claim 1, characterized in that: It also includes a housing and a frame, the frame being located at the bottom opening of the housing, the housing covering the periphery of the clamping module, the positioning module and the transmission module, the transmission module being mounted on the frame, and the control module being mounted on the outer wall of the housing.

10. The integrated clamping, positioning, and driving device for ultrasonic testing of steel strands according to claim 9, characterized in that: The lower end face of the frame is provided with a plurality of feet, which are detachably connected to each corner of the lower end face of the frame.

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