Rail weld flaw detection probe based on array ultrasonic imaging technology

Abstract

The utility model relates to the technical field of steel rail welding seam flaw detection probes, and discloses a steel rail welding seam flaw detection probe based on an array ultrasonic imaging technology, which comprises a shell, a connector is arranged at the top of the shell, and a voltage wafer signal output rod is arranged in the connector. The voltage wafer signal output rods are fixedly connected with voltage wafers distributed in an array mode through connecting wires, the voltage wafers are fixedly connected with wedge blocks, a detection face is arranged below the wedge blocks, positioning plates are arranged on the two sides of the detection face, springs are arranged at the two ends of each positioning plate, one end of each spring tightly presses the top of a sliding plate, and the other end of each spring tightly presses the top of the sliding plate. The sliding plate is fixedly connected into the shell, and protective pads are arranged on the two sides of the shell, so that a worker does not need to press the probe when operating the probe, the constant friction force of the contact surface of the ultrasonic probe and the steel rail is effectively kept, the abrasion speed of the probe is reduced, the detection cost is reduced, and meanwhile the labor intensity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rail weld flaw detection probes, in particular to a rail weld flaw detection probe based on array ultrasonic imaging technology. Background Technique

[0002] Rail is the foundation for the normal operation of high-speed railways. During the welding process of rails, ultrasonic inspection needs to be carried out on the welding seams. Ultrasonic imaging technology is a non-destructive testing method. By emitting ultrasonic waves to the object to be measured and receiving the reflected signals, the image of the internal structure of the object is reconstructed using signal processing technology. The staff presses the ultrasonic probe by hand and slides it along the surface of the rail welding seam to detect the welding seam. However, after working for a long time, the staff may experience fatigue, inattention, etc. When the ultrasonic probe slides relatively fast, it is impossible to effectively control the pressing force of the ultrasonic probe, resulting in excessive pressure and increasing the friction force between the ultrasonic probe and the rail contact surface. It is necessary to frequently replace the ultrasonic probe, increasing the detection cost.

[0003] Therefore, we propose a rail weld flaw detection probe based on array ultrasonic imaging technology. Content of the Utility Model

[0004] The purpose of the utility model is to provide a rail weld flaw detection probe based on array ultrasonic imaging technology to solve the problems mentioned in the above background technique, such as the staff may experience fatigue, inattention, etc. after working for a long time. When the ultrasonic probe slides relatively fast, it is impossible to effectively control the pressing force of the ultrasonic probe, resulting in excessive pressure and increasing the friction force between the ultrasonic probe and the rail contact surface. It is necessary to frequently replace the ultrasonic probe, increasing the detection cost.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A rail weld flaw detection probe based on array ultrasonic imaging technology, including a housing. A connector is provided at the top of the housing. A voltage wafer signal output rod is provided inside the connector. The voltage wafer signal output rod is fixedly connected to a voltage wafer distributed in a whole column through a connecting wire. The voltage wafer is fixedly connected to a wedge block. A detection surface is provided below the wedge block. Positioning plates are provided on both sides of the detection surface. Springs are provided at both ends of the positioning plates. One end of the spring tightly presses the top of a sliding plate. The sliding plate is fixedly connected to the inside of the housing. Protective pads are provided on both sides of the housing.

[0006] Preferably, damping materials are provided inside the housing for the voltage wafer and the wedge block. The damping material is a resin-based composite material.

[0007] Preferably, a magnet is provided inside the positioning plate. The magnet has magnetic attraction.

[0008] Preferably, a scale is provided on one side of the housing, and the scale is marked as the width of the detection surface.

[0009] Preferably, the positioning plate is slidably connected to the inner side of the sliding plate, and one end of the positioning plate is tightly pressed against one end of the spring.

[0010] Preferably, the sliding plate is fixedly connected to the inside of the housing through a screw, and the sliding plate is threadedly connected to two screws.

[0011] Preferably, the connector is perpendicular to the top of the housing, and the outer side of the connector is provided with a thread.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. In the present utility model, a detection surface is provided at the bottom of the housing, positioning plates are provided on both sides of the detection surface, springs are installed at both ends of the positioning plates, one end of the spring is tightly pressed against the top of the sliding plate, and the sliding plate is fixedly connected to the inside of the housing. A magnet is provided inside the positioning plate, so that when the staff operates the probe, there is no need to press, effectively maintaining a constant friction force between the ultrasonic probe and the rail contact surface, thereby reducing the wear speed of the probe and further reducing the detection cost.

[0014] 2. In the present utility model, a magnet is provided inside the positioning plate, springs are installed at both ends of the positioning plates, one end of the spring is tightly pressed against the top of the sliding plate, and the sliding plate is fixedly connected to the inside of the housing, so that the positioning plate is tightly adsorbed on the rail, thereby fixing the position of the probe, ensuring the stability during the detection process and ensuring that the probe adapts to different surface topographies of the rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the overall sectional distribution of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the overall front sectional view of the present utility model;

[0017] Figure 3 is a schematic structural diagram of the overall decomposition of the present utility model;

[0018] Figure 4 is a schematic structural diagram of the overall of the present utility model;

[0019] In the figure: 1. Housing; 2. Connector; 3. Voltage chip signal output rod; 4. Connecting wire; 5. Voltage chip; 6. Wedge block; 7. Detection surface; 8. Positioning plate; 9. Spring; 10. Sliding plate; 11. Protective pad; 12. Magnet; 13. Screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment

[0022] Please refer to Figures 1 - 4 , a rail weld flaw detection probe based on array ultrasonic imaging technology in the figure, includes a housing 1. A connector 2 is provided at the top of the housing 1. Inside the connector 2, there is a voltage wafer signal output rod 3. The voltage wafer signal output rod 3 is fixedly connected by a connecting wire 4 to form an array of voltage wafers 5 distributed in a row. The voltage wafers 5 are fixedly connected to a wedge 6. Below the wedge 6, there is a detection surface 7. On both sides of the detection surface 7, there are positioning plates 8. At both ends of the positioning plates 8, there are springs 9. One end of the spring 9 tightly presses against the top of a sliding plate 10. The sliding plate 10 is fixedly connected to the inside of the housing 1. On both sides of the housing 1, there are protective pads 11. In the present invention, a detection surface 7 is provided at the bottom of the housing 1. On both sides of the detection surface 7, there are positioning plates 8. Springs 9 are installed at both ends of the positioning plates 8. One end of the spring 9 tightly presses against the top of the sliding plate 10, and the sliding plate 10 is fixedly connected to the inside of the housing 1. Inside the positioning plate 8, there is a magnet 12, so that when the staff operates the probe, there is no need to press, effectively maintaining a constant frictional force between the ultrasonic probe and the rail contact surface, thereby reducing the wear speed of the probe and further reducing the detection cost.

[0023] Furthermore, damping materials are provided inside the housing 1 for both the voltage wafers 5 and the wedge 6. The damping material is a resin-based composite material. By skillfully setting damping materials inside the housing 1 for both the voltage wafers 5 and the wedge 6, the resin-based composite material as the damping material has excellent energy absorption and dissipation capabilities. When the voltage wafers 5 vibrate under the action of an alternating electric field and emit ultrasonic waves, the resin-based damping material can quickly absorb the excess energy generated by the wafer vibration, reduce the duration of the vibration, thereby improving the clarity and accuracy of ultrasonic wave emission.

[0024] Furthermore, a magnet 12 is provided inside the positioning plate 8. The magnet 12 has magnetic attraction. By cleverly arranging the magnet 12 inside the positioning plate 8, the magnetic attraction of the magnet 12 enables the positioning plate 8 to be more firmly adsorbed on the object to be detected, such as a rail. The enhanced adsorption force ensures that the probe will not easily fall off or shift during the sliding or moving process, thereby improving the accuracy and reliability of detection. Even on an uneven or inclined detection surface, the probe can maintain a stable position and posture. At the same time, the adsorption effect of the magnet 12 makes the contact between the probe and the object closer and smoother, so that when the operator operates the probe, there is no need to press, effectively maintaining a constant frictional force between the ultrasonic probe and the rail contact surface, thereby reducing the wear rate of the probe, further reducing the detection cost, and also reducing the operation difficulty and labor intensity.

[0025] Furthermore, a scale is provided on one side of the outer shell 1. The scale is marked as the width of the detection surface 7. By specially providing a scale on one side of the outer shell 1, the scale provides an intuitive reference for the width of the detection surface 7. The operator can quickly understand the specific width of the detection surface 7 by observing the scale, thereby more accurately determining the detection area and range, avoiding detection omissions or repetitions caused by unclear width of the detection surface 7, and improving the accuracy and efficiency of detection.

[0026] Furthermore, the positioning plate 8 is slidably connected to the inner side of the sliding plate 10, and the positioning plate 8 tightly presses one end of the spring 9. Through the sliding connection between the positioning plate 8 and the sliding plate 10, and the positioning plate 8 tightly pressing one end of the spring 9, the positioning plate 8 is slidably connected to the inner side of the sliding plate 10, enabling the probe to more flexibly adapt to different detection surfaces and angles during the detection process. When the operator adjusts the position or direction of the probe, the positioning plate 8 can smoothly slide inside the sliding plate 10, ensuring that the probe always maintains close contact with the object to be detected, thereby improving the accuracy and reliability of detection.

[0027] Furthermore, the sliding plate 10 is fixedly connected to the inside of the outer shell 1 through the screw 13. The sliding plate 10 is threadedly connected to the two screws 13. Through the fixed connection of the screw 13, the sliding plate 10 can be firmly installed inside the outer shell 1, ensuring the overall stability of the probe during the detection process. This stable structure enables the probe to maintain the integrity of its shape and performance even when subjected to large detection pressures or impacts, thereby improving the accuracy and reliability of detection. Secondly, the design of the sliding plate 10 being threadedly connected to the two screws 13 provides convenience for the adjustment and maintenance of the positioning plate 8.

[0028] In this solution, the workflow is as follows: First, the operator places the probe on the rail weld to be detected, ensuring that the detection surface 7 of the probe is in close contact with the rail surface. At this time, the magnet 12 inside the positioning plate 8 exerts its magnetic attraction, causing the positioning plate 8 to tightly adhere to the rail, thereby fixing the position of the probe and ensuring stability during the detection process.

[0029] Then the joint 2 receives the electrical signal from the detection instrument and transmits it to the voltage crystal signal output rod 3. The voltage crystal signal output rod 3 further transmits the signal to the voltage crystals 5 distributed in a whole row through the connecting wire 4. After receiving the signal, the voltage crystals 5 generate vibrations and transmit the vibration energy to the wedge 6.

[0030] The wedge 6 focuses and guides the vibration energy to the detection surface 7, enabling ultrasonic waves to be vertically and efficiently emitted into the rail weld. At this time, the scale on one side of the outer shell 1 provides an intuitive reference for the operator regarding the width of the detection surface 7, which helps to precisely control the detection range.

[0031] After the ultrasonic waves interact with the internal defects in the rail weld, the reflected echo is received by the detection surface 7 and is transmitted back to the voltage crystal signal output rod 3 again through the wedge 6 and the voltage crystals 5. Finally, the signal is transmitted back to the detection instrument for processing and imaging, thereby achieving precise detection of the internal defects in the rail weld.

[0032] During the entire detection process, the positioning plate 8 not only provides magnetic attraction through the magnet 12 inside it, but also slides inside the inner side of the sliding plate 10 and keeps pressing tightly on one end of the spring 9, ensuring the stable sliding of the probe on the rail and its adaptation to different surface topographies. The sliding plate 10 is fixedly connected inside the outer shell 1 through the screw 13, providing a stable support structure for the probe.

[0033] At the same time, damping materials are provided inside the outer shell 1 both in the voltage crystals 5 and the wedge 6, which can absorb and disperse the vibration energy, reduce the stray waves and noise inside the probe, and further improve the clarity and accuracy of the detection. The protective pads 11 on both sides of the outer shell 1 play a role in protecting the probe and the rail surface, preventing scratches or damages during the detection process.

[0034] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A rail weld flaw detection probe based on array ultrasonic imaging technology, characterized in that: The invention comprises a shell (1), a joint (2) is provided on the top of the shell (1), a voltage chip signal output rod (3) is provided inside the joint (2), the voltage chip signal output rod (3) is fixedly connected to voltage chips (5) distributed in a row through a connecting line (4), the voltage chip (5) is fixedly connected to a wedge block (6), a detection surface (7) is provided below the wedge block (6), positioning plates (8) are provided on both sides of the detection surface (7), springs (9) are provided at both ends of the positioning plate (8), one end of the spring (9) is tightly pressed against the top of a sliding plate (10), the sliding plate (10) is fixedly connected to the inside of the shell (1), and protective pads (11) are provided on both sides of the shell (1).

2. The rail weld flaw detection probe based on array ultrasonic imaging technology according to claim 1, characterized in that: The voltage chip (5), the wedge block (6) and the housing (1) are all provided with damping material inside, and the damping material is a resin-based composite material.

3. The rail weld flaw detection probe based on array ultrasonic imaging technology according to claim 1, characterized in that: A magnet (12) is provided inside the positioning plate (8), and the magnet (12) has magnetic attraction.

4. The rail weld flaw detection probe based on array ultrasonic imaging technology according to claim 1, characterized in that: A scale is provided on one side of the housing (1), and the scale indicates the width of the detection surface (7).

5. The rail weld flaw detection probe based on array ultrasonic imaging technology according to claim 1, characterized in that: The positioning plate (8) is slidably connected to the inner side of the sliding plate (10), and the positioning plate (8) is tightly pressed against one end of the spring (9).

6. The rail weld flaw detection probe based on array ultrasonic imaging technology according to claim 5, characterized in that: The sliding plate (10) is fixedly connected to the interior of the housing (1) via screw rods (13), and the sliding plate (10) is threadedly connected to two screw rods (13).

7. The rail weld flaw detection probe based on array ultrasonic imaging technology according to claim 1, characterized in that: The joint (2) is perpendicular to the top of the outer shell (1), and a spiral pattern is provided on the outer side of the joint (2).

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