An ultrasonic automatic flaw detection device for drilling tools

Abstract

This invention belongs to the field of ultrasonic testing technology, specifically an automatic ultrasonic flaw detection device for drilling tools. It includes a robotic arm with a probe bracket fixed to its load end. A sliding rod is symmetrically slidable on the probe bracket, with a roller hinged to the bottom of the sliding rod. A cylinder is fixed to the circumferential wall of the sliding rod, and a tapered rod is provided at the load end of the cylinder. A marking frame is slidably mounted at the axis of the probe bracket. An ultrasonic probe and a spray head are mounted on the outer wall of the probe bracket. During testing, the robotic arm moves the probe bracket. After the roller contacts the workpiece, it pushes the sliding rod to compress the first spring, simultaneously pushing the tapered rod to compress the marking frame to compress the second spring. When the probe is in contact with the testing surface, the tank is connected to a water supply pipe for automatic spraying. When a defect is detected, the cylinder drives the tapered rod to reset, and the marking frame resets under the action of the second spring. The marking pad completes the defect marking, and the water path is cut off, achieving adaptive probe contact, automated spraying, and marking, thus improving testing accuracy and efficiency.

Description

Technical Field

[0001] This invention belongs to the field of ultrasonic testing technology, specifically referring to an automatic ultrasonic flaw detection device for drilling tools. Background Technology

[0002] Drill pipes are subjected to high pressure, torque, impact, and corrosive media over long periods. Defects at their joints, if not detected in time, can lead to drill pipe breakage during operation and cause downhole accidents. Therefore, non-destructive testing of drill pipe joints is a crucial step in ensuring drilling safety. Ultrasonic testing technology, due to its high accuracy and strong sensitivity to internal defects, has become the mainstream method for non-destructive testing of drill pipe joints. However, existing ultrasonic testing devices for drilling tools have the following problems:

[0003] (1) The surface of the drill pipe joint has a certain curvature, and the joint size of different specifications of drill pipes is different. Existing devices mostly adopt a fixed bracket structure, which makes it difficult to achieve adaptive fitting between the probe and the joint detection surface. If the fit is too loose, the ultrasonic signal propagation attenuation is large, and it is easy to miss the detection. If the fit is too tight, it will not only cause probe wear, but may also cause stress concentration in the detection area due to uneven pressure, affecting the accuracy of defect judgment.

[0004] (2) The spray valve needs to be turned on before the test. After the test, it is necessary to distinguish between qualified and unqualified workpieces. When a defect is detected in the drill pipe joint, the existing devices mostly only display the defect signal through the monitoring host, and lack timely marking of the defect location, which may lead to the deviation of the defect location recording. The workpiece needs to be re-examined, which increases the test time. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and provides an ultrasonic automatic flaw detection device for drilling tools. When the robotic arm drives the probe bracket close to the drill pipe joint, the marking frame moves synchronously to a preset position, the tank is aligned and connected with the water supply pipeline, and the spray head sprays automatically. When the detection is completed or a defect is found, the marking frame resets to separate the tank from the water supply pipeline and cut off the water flow. When a defect is detected, the cylinder drives the cone rod away from the cone cap, and the marking frame quickly resets under the action of the second spring. Its end pad can promptly complete the physical marking on the surface of the defect area.

[0006] The technical solution adopted by this invention is as follows: This solution provides an ultrasonic automatic flaw detection device for drilling tools, including a robotic arm for moving and carrying components. A probe bracket is fixedly provided at the load end of the robotic arm. A sliding rod is symmetrically slidable on the probe bracket, which can slide along the axial direction of the probe bracket. A roller is hinged to the bottom end of the sliding rod, which is used to contact the surface of the drill pipe joint before detection. The sliding rod is pushed to move by the reaction force, while reducing friction with the workpiece surface. A marking frame is slidably provided at the axis of the probe bracket to realize marking and water flow control. The marking frame is located on the moving path of the sliding rod. An ultrasonic probe is fixedly provided at the axis of the outer wall of the probe bracket to emit ultrasonic waves to the drill pipe joint and receive reflected signals to realize defect detection. A spray head is fixedly provided through the probe bracket.

[0007] Furthermore, a first spring is fixedly provided at one end of the slide rod located on the inner wall of the probe bracket, and the other end of the first spring is fixedly connected to the inner wall of the probe bracket to provide elastic force to reset the slide rod after the detection is completed.

[0008] Furthermore, a cylinder is fixedly installed on the circumferential wall of the slide rod. The cylinder is electrically connected to the ultrasonic probe. A cone rod is fixedly installed on the load end of the cylinder. The cylinder receives the detection signal and drives the cone rod to extend and retract. The cone rod controls the movement of the marking frame.

[0009] Furthermore, a cone cap is provided at the top of the marking frame, the cone cap is located on the moving path of the cone rod, and a second spring is fixedly provided at the flat end of the cone cap. The other end of the second spring is fixedly connected to the probe bracket to provide elastic force to reset the marking frame.

[0010] Furthermore, a water supply pipe is provided through the inner wall of the probe bracket, and the spray head is connected to the water outlet of the water supply pipe.

[0011] Furthermore, a groove is provided through the inner wall of the marking frame, and the water supply pipeline is located on the moving path of the groove. The groove is used to connect the water supply pipeline after the marking frame moves.

[0012] Furthermore, it also includes a monitoring host and a multi-channel ultrasonic testing module. The monitoring host and the multi-channel ultrasonic testing module are connected by a network cable, and the ultrasonic probe is connected to the multi-channel ultrasonic testing module. The monitoring host can be a desktop computer, tablet computer, laptop computer or industrial control computer. In situations where more testing locations are required, one monitoring host can connect to multiple multi-channel ultrasonic testing modules, and simultaneously control, process waveforms and monitor images of multiple multi-channel ultrasonic testing modules to achieve synchronous linkage testing of multiple parts.

[0013] The beneficial effects achieved by the present invention using the above structure are as follows:

[0014] (1) When the robotic arm moves the probe bracket close to the drill pipe joint, the roller first contacts the workpiece surface and pushes the slide bar to compress the first spring through the reaction force; during the movement of the slide bar, the cone rod is pushed to abut against the cone cap of the marking frame, so that the marking frame compresses the second spring and moves synchronously with the slide bar, so that the ultrasonic probe is always in precise contact with the detection surface of the drill pipe joint, avoiding detection omissions caused by uneven workpiece surface or robotic arm positioning deviation; at the same time, the rolling support of the roller can reduce friction damage between the probe bracket and the workpiece surface and extend the service life of the component;

[0015] (2) When the robotic arm presses down to the ultrasonic probe contacting the detection surface, the marking frame moves synchronously to the preset position, the groove on its inner wall aligns with and connects with the water supply pipe in the probe bracket, and the spray head sprays water onto the detection surface; after the detection is completed, the marking frame resets under the action of the second spring, the groove is offset from the water supply pipe and the water flow is cut off; if a defect is detected, the cone rod moves away from the cone cap, the marking frame quickly resets under the action of the second spring, and the printing pad at its end directly completes the physical marking on the surface of the defect area. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an ultrasonic automatic flaw detection device for drilling tools proposed in this invention.

[0017] Figure 2 This is a schematic diagram illustrating the use of an ultrasonic automatic flaw detection device for drilling tools proposed in this invention.

[0018] Figure 3 This is a schematic diagram of the probe holder proposed in this invention;

[0019] Figure 4 This is a schematic cross-sectional view of the probe holder proposed in this invention.

[0020] Figure 5 This is a schematic diagram of the structure of the marker frame proposed in this invention.

[0021] The components include: 1. robotic arm, 2. probe bracket, 3. slide bar, 4. roller, 5. first spring, 6. cylinder, 7. cone rod, 8. marking frame, 9. cone cap, 10. second spring, 11. tank, 12. ultrasonic probe, 13. spray head, and 14. water supply pipeline.

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] Example 1: Please refer to Figures 1-5 This embodiment provides an ultrasonic automatic flaw detection device for drilling tools, including a robotic arm 1. A probe bracket 2 is fixedly mounted on the load end of the robotic arm 1. A slide rod 3 is symmetrically slidable on the probe bracket 2. A roller 4 is hinged to the bottom end of the slide rod 3. A first spring 5 is fixedly mounted on one end of the slide rod 3 located on the inner wall of the probe bracket 2. The other end of the first spring 5 is fixedly connected to the inner wall of the probe bracket 2. A cylinder 6 is fixedly mounted on the circumferential wall of the slide rod 3. A conical rod 7 is fixedly mounted on the load end of the cylinder 6. A marking frame 8 is slidably mounted at the axis of the probe bracket 2. A printing pad is fixedly mounted on the end of the marking frame 8 away from the robotic arm 1. A conical cap 9 is mounted on the top of the marking frame 8. The conical cap 9 is located on the moving path of the conical rod 7. A second spring 10 is fixedly mounted on the flat end of the conical cap 9. The other end of the second spring 10 is fixedly connected to the probe bracket 2. A groove 11 is provided through the inner wall of the marking frame 8. An ultrasonic probe 12 is fixedly mounted at the center of the outer wall of the probe bracket 2. The cylinder 6 is electrically connected to the ultrasonic probe 12. A spray head 13 is fixedly mounted through the probe bracket 2. A water supply pipe 14 passes through the inner wall of the probe bracket 2. The spray head 13 is connected to the water outlet of the water supply pipe 14. The water supply pipe 14 is located on the moving path of the tank 11.

[0025] In this embodiment, the monitoring host of the testing site is connected to the multi-channel ultrasonic testing module via a network cable, and then the ultrasonic probe 12 is connected to the multi-channel ultrasonic testing module. The multi-channel ultrasonic testing module is an independent ultrasonic module. The monitoring host and the multi-channel ultrasonic testing module are designed separately to ensure better stability and higher performance indicators. They are connected only via a network cable and will not be affected by electronic interference or software systems of the monitoring host.

[0026] The operator places the drill pipe joint to be inspected on the roller conveyor of the pipeline transport device. The robotic arm 1 moves the probe bracket 2 according to the preset motion trajectory, so that the ultrasonic probe 12 is directly facing the center of the inspection area of ​​the drill pipe joint. The robotic arm 1 continues to move towards the drill pipe joint. The roller 4 on the probe bracket 2 first contacts the surface of the drill pipe joint. As the robotic arm 1 continues to press down, the roller 4 is subjected to the reaction force of the drill pipe joint, which drives the slide rod 3 to move towards the robotic arm 1, and the first spring 5 is compressed. During the movement of the slide rod 3, the flat end of the cone rod 7 abuts against the flat end of the cone cap 9 at the top of the marking frame 8. As the slide rod 3 continues to move, the cone rod 7 pushes the cone cap 9 to move the marking frame 8 towards the robotic arm 1, and the second spring 10 is stretched. When the robotic arm 1 presses down until the ultrasonic probe 12 is in contact with the inspection surface of the drill pipe joint, the robotic arm 1 stops moving. The groove 11 on the marking frame 8 enters the probe bracket 2, so that the water supply pipeline 14 is connected and the spray head 13 begins to spray water onto the inspection surface of the drill pipe joint.

[0027] The control system sends instructions to the pipeline transport device, which drives the drill pipe joint to rotate at a constant speed. At the same time, it controls the dual-channel ultrasonic detection module to start working. The ultrasonic probe 12 emits ultrasonic waves into the drill pipe joint and receives the reflected ultrasonic signals. After the ultrasonic signals are processed by the module, they are converted into digital signals and transmitted to the monitoring host. The detection software of the monitoring host displays the ultrasonic waveform and detection data in real time. The drill pipe joint rotates 1-2 revolutions, and the ultrasonic probe 12 completes a comprehensive inspection of the entire circumference of the drill pipe joint.

[0028] Subsequent processing of defect-free workpieces: After inspection, the control system sends a command to robotic arm 1. Robotic arm 1 moves probe bracket 2 away from drill pipe joint. At this time, slide bar 3 resets under the elastic force of first spring 5. Slide bar 3 drives cylinder 6 and cone rod 7 to reset synchronously. Marking frame 8 resets under the elastic force of second spring 10. The groove 11 on marking frame 8 is misaligned with the water inlet of water supply pipeline 14. Water supply pipeline 14 is cut off, spray head 13 stops spraying, and pipeline transport device continues to operate, transporting the qualified drill pipe joint to the next station, completing the inspection process of a defect-free workpiece.

[0029] Detection and handling of defective workpieces: If the ultrasonic probe 12 detects a defect inside the drill pipe joint during the inspection process, the defect signal is processed by the module and transmitted to the monitoring host. At the same time, the module sends a control signal to the cylinder 6, which drives the cone rod 7 away from the cone cap 9. The marking frame 8 quickly resets under the elastic force of the second spring 10. The groove 11 on the marking frame 8 is misaligned with the inlet of the water supply pipe 14, the water supply pipe 14 is cut off, and the spray head 13 stops spraying. During the reset process of the marking frame 8, the stamp pad at the end of the marking frame 8 contacts the surface of the defective area of ​​the drill pipe joint, completing the marking. After receiving the defect signal, the monitoring host immediately triggers the alarm system to remind the operator. The control system sends a command to the pipeline transportation device, which stops operating, the drill pipe joint stops rotating, and the module's inspection work is stopped. After receiving the alarm, the operator goes to the inspection station, handles the defective workpiece, and then proceeds to the next normal inspection procedure.

[0030] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. An ultrasonic automatic flaw detection device for a drilling tool, comprising a mechanical arm (1), characterized in that, The mechanical arm (1) is fixed with a probe support (2) at the load end, the probe support (2) is symmetrically slidably provided with a slide rod (3), the bottom end of the slide rod (3) is hingedly provided with a roller shaft (4), the shaft center of the probe support (2) is slidably provided with a marking frame body (8), the marking frame body (8) is located on the movement path of the slide rod (3), the outer wall shaft center of the probe support (2) is fixedly provided with an ultrasonic probe (12), and the probe support (2) is fixedly provided with a spray head (13) in a through manner; One end of the slide rod (3) is fixedly provided with a first spring (5) on the inner wall of the probe support (2), and the other end of the first spring (5) is fixedly connected to the inner wall of the probe support (2); The circumferential wall of the slide rod (3) is fixedly provided with a gas cylinder (6), the gas cylinder (6) is electrically connected with the ultrasonic probe (12), and the load end of the gas cylinder (6) is fixedly provided with a taper rod (7); The top end of the marking frame body (8) is provided with a taper cap (9), the taper cap (9) is located on the movement path of the taper rod (7), the planar end of the taper cap (9) is fixedly provided with a second spring (10), and the other end of the second spring (10) is fixedly connected with the probe support (2); The inner wall of the probe support (2) is provided with a water supply pipeline (14), and the spray head (13) is in communication with the water outlet end of the water supply pipeline (14); The inner wall of the marking frame body (8) is provided with a groove (11) in a penetrating manner, and the water supply pipeline (14) is located on the movement path of the groove (11).

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