Water immersion flaw detection equipment for long shaft

Abstract

The invention belongs to the technical field of flaw detection equipment, and discloses water immersion flaw detection equipment for a long shaft, which comprises a water tank, a lifting assembly, a long shaft clamping assembly, a long shaft driving assembly and a manipulator, the lifting assembly comprises a supporting arm which penetrates into the water tank and can move in a lifting mode, and a containing component is arranged on the supporting arm. The long shaft clamping assembly comprises a first mechanical clamping assembly and a second mechanical clamping assembly, and the first mechanical clamping assembly and the second mechanical clamping assembly move relatively so that a long shaft can be clamped between the first mechanical clamping assembly and the second mechanical clamping assembly. The long shaft driving assembly is in transmission connection with the first machine clamp assembly and / or the second machine clamp assembly. And a detection probe is arranged on the manipulator. The device can adapt to nondestructive testing of long shafts of different specifications, all-directional dead-corner-free nondestructive testing of the long shafts is achieved, and the problems that detection equipment of a long shaft manufacturing plant is low in automation degree and low in detection efficiency are effectively solved.

Description

Technical Field

[0001] This invention belongs to the field of flaw detection equipment technology, and particularly relates to a water immersion flaw detection device for long shafts. Background Technology

[0002] As core components of mechanical transmission systems, shafts play a crucial role in transmitting loads and torques within equipment and workpieces. Their operational characteristics dictate that they must possess excellent mechanical properties; however, defects such as cracks and internal shrinkage cavities that may occur during processing can significantly reduce structural strength. During long-term service, these defects can easily lead to stress concentration, ultimately resulting in catastrophic failures such as component deformation or shaft breakage. This not only causes equipment downtime losses but may also trigger secondary safety accidents. To ensure operational reliability, modern manufacturing systems have incorporated non-destructive testing into the standard quality control process for shaft components.

[0003] Ultrasonic testing technology, due to its unique physical testing principle, has become the most widely used non-destructive testing method. Based on the differences in the acoustic properties of materials, this technology analyzes the waveform characteristics, reflection energy attenuation, and penetration characteristics of ultrasonic waves at the interface of media to achieve precise location and quantitative assessment of internal defects in materials. Compared with other methods such as X-ray testing, ultrasonic testing has advantages such as high detection sensitivity, good operational safety, and strong environmental adaptability.

[0004] However, traditional inspection methods suffer from significant efficiency bottlenecks: currently, industrial inspection still commonly uses handheld ultrasonic flaw detectors, requiring inspectors to manually scan the workpiece surface point by point. This approach has three major limitations: first, the manual point selection inspection mode means that the inspection coverage depends on the operator's experience, posing a risk of missed inspections; second, the inspection of a single piece is time-consuming, directly increasing labor costs; and most importantly, in the face of mass production scenarios, traditional inspection methods cannot meet the cycle time requirements of modern production lines, becoming a technological bottleneck restricting the transformation to intelligent manufacturing. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention discloses a water immersion flaw detection device for long shafts, which can adapt to non-destructive testing of long shafts of different specifications and achieve all-round, blind-angle non-destructive testing of long shafts, effectively solving the problems of low automation and low testing efficiency of testing equipment in long shaft manufacturers.

[0006] The specific technical solution of the present invention is as follows: A water immersion flaw detection device for long shafts, comprising: Water tank, used to hold coupling water; A lifting assembly, the lifting assembly including a support arm that extends into the water tank and can be lifted and lowered, and a storage component is provided on the support arm; A long shaft clamping assembly, comprising a first clamping assembly and a second clamping assembly, wherein the first clamping assembly and the second clamping assembly are movable relative to each other to clamp the long shaft between the first clamping assembly and the second clamping assembly. A long shaft drive assembly, which is driveably connected to clamping assembly one and / or clamping assembly two, wherein the long shaft drive assembly actuates to drive a long shaft clamped between clamping assembly one and clamping assembly two to rotate about its axis; and A robotic arm equipped with a detection probe is used to drive the detection probe to perform flaw detection on the long shaft in a water tank containing coupling water.

[0007] In this application, the coordinated action of the lifting assembly, the long shaft clamping assembly, the long shaft drive assembly, and the robot arm enables the long shaft to change position and rotate around its own axis, thereby allowing the robot arm to carry a detection probe to perform convenient and non-destructive testing on the long shaft during movement, thus meeting actual production needs.

[0008] Preferably, both the clamping assembly one and the clamping assembly two include: The rotating component, friction disk, and center positioning component are provided. The friction disk and center positioning component are disposed on one end of the rotating component in the axial direction. The friction disk is used to contact the end of the long shaft, and the center positioning component is used to contact the center of the end face of the long shaft. The central positioning member is axially movable relative to the friction disk. In its free state, the central positioning member protrudes axially from the friction disk to engage with the central hole on the end face of the long shaft.

[0009] Two friction discs clamp the end faces of the long shaft, while two central positioning components align the centerline of the long shaft. This allows for rotational drive of the long shaft during the movement of the rotating components, enabling the detection probe to perform circumferential inspection of a portion of the long shaft while maintaining a constant relative position. Consequently, omnidirectional non-destructive testing of the long shaft can be completed as the robot arm moves axially along the long shaft. Since the central positioning components can move axially relative to the friction discs, during assembly, the long shaft is first positioned along its centerline using the central positioning components. Then, further movement of the clamping components one and two allows the two friction discs to clamp the end faces of the long shaft, ensuring concentricity and making the inspection process more stable and accurate.

[0010] Preferably, the rotating component is provided with a mounting cavity, and an elastic element is provided in the mounting cavity along the opening direction of the long axis clamping assembly. A part of the structure of the central positioning component is located in the mounting cavity, and this part of the structure is connected to the elastic element.

[0011] The central positioning component and the rotating component are connected by an elastic element. When the central positioning component is subjected to force and moves into the mounting cavity, the elastic element compresses and deforms to store energy, thereby enabling the end face of the long shaft to contact the friction disc at the same end. After the long shaft is released, the elastic element releases its stored energy, thereby pushing the central positioning component back to its original position to meet the requirements of the next test.

[0012] Preferably, the clamping assembly one and the clamping assembly two further include: A movable base and a rotary base, wherein the rotating component is rotatably mounted on the movable base via the rotary base, and the movable base is slidably mounted on a guide rail provided along the opening direction of the long axis clamping assembly; A bearing component is provided between the rotary seat and the rotating component, and the end of the rotating component near the friction disc is connected to the rotary seat through a rotating sealing seat.

[0013] This structure is simple and easy to implement, and can well meet the motion requirements of clamping assembly one and clamping assembly two, as well as the rotation requirements of the long shaft around the axis.

[0014] Preferably, in the opening direction of the long shaft clamping assembly, at least one of the clamping assemblies one and two is provided with an elastic element two between the friction disc and the rotating component.

[0015] When the second elastic element is compressed, it can provide a reaction force to the long shaft, thereby enabling a closer contact between the friction disk and the end face of the long shaft. This allows for a more stable drive of the long shaft around its axis after the friction disk rotates, thus achieving better flaw detection of the long shaft.

[0016] Preferably, the support arm and the water tank are sealed together by a sealing assembly; The sealing assembly includes a water curtain sealing assembly and a sealing connection assembly. The sealing connection assembly is connected between the support arm and the water tank. The water curtain sealing assembly is engaged with the sealing connection assembly along the axial direction of the support arm. The water curtain sealing assembly and the support arm are spaced apart to form an annular water outlet gap. High-pressure water is introduced into the water outlet gap so that the high-pressure water is sprayed out into the water tank to form a ring-shaped high-pressure water curtain distributed along the circumference of the support arm.

[0017] During the operation of the lifting assembly, impurities in the water may be drawn into the gap between the support arm and the sealing assembly, which may damage the sealing surface and cause water leakage. Therefore, this application utilizes the water outlet gap formed between the watertight sealing assembly and the support arm to form a water curtain inside the water tank by injecting high-pressure water flow, thereby preventing impurities from entering the gap of the sealing assembly, protecting the sealing surface between the lifting assembly and the sealing assembly, and thus extending the stability and reliability of the equipment in long-term operation.

[0018] Preferably, the water curtain sealing assembly is provided with a water passage, or a water passage is formed between the water curtain sealing assembly and the sealing connection assembly; The water passage includes an annular rectifying cavity located outside the water outlet gap. The annular rectifying cavity is connected to the water outlet gap so that after high-pressure water is introduced into the water passage, the high-pressure water is shaped by the annular rectifying cavity and then ejected from the water outlet gap.

[0019] The annular rectifier cavity can rectify the high-pressure water flow to form a water flow that is conducive to the formation of a water curtain, thereby better preventing impurities from entering the gaps of the sealing component.

[0020] Preferably, the water curtain sealing assembly includes an annular water outlet component with the water passage, the annular water outlet component being gapped and fitted onto the outside of the support arm to form a water outlet gap, and the water passage further includes a water inlet channel provided in the annular water outlet component; When a water passage is formed between the water curtain sealing assembly and the sealing connection assembly, a flat space is formed between the water curtain sealing assembly and the sealing connection assembly, and the flat space is configured as an annular rectifier cavity.

[0021] This structure is simple and easy to implement, and can effectively form an annular rectifier cavity to rectify the high-pressure water flow, thereby meeting the requirements for the formation of a water curtain.

[0022] Preferably, the sealing connection assembly includes a dustproof seal, which is slidably fitted with the support arm. The dustproof seal has a blocking portion that extends axially into the water outlet gap along the support arm to introduce high-pressure water flow from the annular rectifier cavity into the water outlet gap.

[0023] Dustproof seals are used for dustproof sealing. By placing them at the end of the sealing gap near the water outlet gap, they can act as a barrier. By designing them with a barrier portion that extends beyond the sealing assembly and into the water outlet gap, the barrier portion can block the high-pressure water flow perpendicular to the support arm while adhering to the support arm, and guide it towards the water outlet gap. This greatly improves the blocking effect on impurities and prevents high-pressure water from entering the sealing gap.

[0024] Preferably, the water outlet gap extends along the axial direction of the robotic arm to form a guide structure for the high-pressure water flow to be ejected along the axial direction of the support arm.

[0025] By extending the water outlet gap axially towards the support arm, it is easier for the water sprayed from the water outlet gap to form an annular high-pressure water curtain that runs along the axial direction of the support arm and fits the circumferential surface of the support arm. This allows the annular high-pressure water curtain to spray a longer distance along the circumferential surface of the support arm, thereby improving the barrier sealing effect and making it more difficult for impurities in the water to enter the sealing gap.

[0026] Compared with existing technologies, this invention enables non-destructive testing of long shafts, featuring high sensitivity and high accuracy. The invention supports the long shaft by inserting a movable support arm of the lifting assembly into a water tank. Under the sealing effect of the sealing assembly, the sealing connection assembly achieves a sealed connection between the support arm and the water tank. Simultaneously, the water curtain sealing assembly sprays an annular high-pressure water curtain around the support arm axially. This annular high-pressure water curtain prevents impurities from the water tank from being brought into the sealing gap during the support arm's retraction, protecting the sealing surface between the support arm and the sealing connection assembly. Furthermore, this invention ensures the concentricity of the long shaft rotating around its axis, guaranteeing the stability and effectiveness of the detection probe. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a state according to an embodiment of the present invention; Figure 2 for Figure 1 Top view; Figure 3 This is another schematic diagram of a state according to an embodiment of the present invention; Figure 4 for Figure 3 The front view; Figure 5 This is a schematic diagram of the clamping of the long shaft in an embodiment of the present invention; Figure 6 This is a top view of the water tank in an embodiment of the present invention; Figure 7 for Figure 6 JJ sectional view; Figure 8 for Figure 7 Enlarged view of point A; Figure 9 for Figure 8 Enlarged view of point B.

[0028] In the diagram: 1-Water tank; 2-Robot arm; 3-Support arm; 4-Placement component; 5-Frame; 6-Moving base; 7-Linear guide rail one; 8-Linear guide rail two; 9-Rotating component; 10-Friction disc; 11-Center positioning component; 12-Motor; 13-Coupling; 14-Elastic component one; 15-Moving base; 16-Rotating base; 17-Elastic component two; 18-Water outlet gap; 19-Annular rectifier cavity; 20-Annular water outlet component; 21-Water nozzle component; 22-Sealing sleeve; 23-Dustproof seal; 24-Shaft support ring; 25-Waterproof sealing ring; 26-Annular adapter; 27-Annular connecting seat. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to specific embodiments.

[0030] like Figures 1 to 8 As shown, a water immersion flaw detection device for a long shaft includes a water tank 1, a lifting assembly, a long shaft clamping assembly, a long shaft drive assembly, and a robotic arm 2. The water tank 1 is used to hold coupling water. The lifting assembly includes a support arm 3 that extends into the water tank 1 and can be raised and lowered, and a placement component 4 is provided on the support arm 3. The long shaft clamping assembly includes a first clamping assembly and a second clamping assembly, which are movable relative to each other to clamp the long shaft between the first clamping assembly and the second clamping assembly. The long shaft drive assembly is kinetically connected to the first clamping assembly and / or the second clamping assembly, and the long shaft drive assembly is activated to drive the long shaft clamped between the first clamping assembly and the second clamping assembly to rotate around its axis. The robotic arm 2 is equipped with a detection probe, and the robotic arm 2 drives the detection probe to perform flaw detection on the long shaft in the water tank 1 containing coupling water.

[0031] During the manufacturing process, axles under inspection may develop defects such as cracks and porosity, necessitating non-destructive testing of their internal structure. To address the rapidly increasing market demand for axles under inspection and the rising requirements for production standards, the axles under inspection can be used as long axles for non-destructive testing in the testing equipment provided in this embodiment.

[0032] The axle under inspection is subjected to ultrasonic non-destructive testing. During ultrasonic testing, water is used as a coupling agent between the testing probe and the axle to reduce the acoustic impedance difference between them, thereby reducing the reflection loss of ultrasonic energy at this interface. In this embodiment, the water tank 1 is fixed on the frame 5. When the equipment is in normal use, the water tank 1 contains water. The axle under inspection is lowered by the lifting assembly to the positions of clamp assembly one and clamp assembly two. The relative movement of clamp assembly one and clamp assembly two holds the axle under inspection in place. After the support arm 3 further lowers, the axle under inspection is suspended in the air. At this time, since the two end faces of the axle under inspection are in close contact with clamp assembly one and clamp assembly two respectively, when the long shaft drive assembly is activated, it forces the axle under inspection to rotate, realizing ultrasonic testing of the entire axle.

[0033] The water tank 1 is used to hold liquids for testing or cleaning, so that the liquid can be used in conjunction with corresponding testing or cleaning mechanisms to test or clean target objects. For example, when testing target objects such as axles, it can be used in conjunction with an ultrasonic probe to perform flaw detection on the axle. In this embodiment, the coupling fluid in the water tank 1 is used for testing, and it is equipped with a coupling water circulation system. The coupling water circulation system has a filter that can filter impurities in the water tank 1, thereby ensuring a clear testing environment.

[0034] The frame 5 is the basic component of the flaw detection equipment in this embodiment, and all components are mounted and fixed on the frame 5. In this embodiment, as... Figures 1-4 As shown, the clamping assembly one and clamping assembly two include a movable base 6, which is slidably mounted on a guide rail arranged along the opening direction of the long axis clamping assembly. In other words, the frame 5 is provided with a linear guide rail 7, and the movable base 6 and the linear guide rail 7 are slidably engaged. By moving the movable base 6 of clamping assembly one and clamping assembly two left and right, the inspected axle is clamped. After the long axis drive assembly is activated, the inspected axle rotates. Furthermore, when the support arm 3 is fully extended, the placement component 4 at the end of the support arm 3 protrudes above the water surface of the water tank 1. When the inspected axle flows from the previous process of the axle production line, it can be caught on the water surface, and the transfer tool will not come into contact with water, thus avoiding rust problems. In this embodiment, the placement component 4 is equipped with a V-block, which contains a pressure sensor. Therefore, when the placement component 4 of the support arm 3 is connected to the axle, the sensor on the V-block sends a command, causing the support arm 3 to descend. When it reaches the same height as the clamping assembly one and clamping assembly two, it stops descending. At this point, clamping assembly one and clamping assembly two move closer together to clamp the axle being inspected, thereby lifting the axle. It is understood that during this process, after clamping assembly one and clamping assembly two clamp the axle being inspected, the lifting assembly performs further actions to ensure that the V-block maintains a sufficient distance from the axle, avoiding false signals during ultrasonic testing. The inner surface of the V-block is provided with a protective pad. The V-block facilitates the placement of shaft-like objects, and the protective pad provides protection; its material is preferably rubber.

[0035] In this embodiment, the detection probe is mounted on the robotic arm 2, which enables the probe to detect the axle at any angle. The robotic arm 2 is located outside the water tank 1, and a linear guide rail 8 is provided on the frame 5. The robotic arm 2 and the linear guide rail 8 slide together. This embodiment has two robotic arms 2, located at opposite ends of the water tank 1, thereby improving the flaw detection efficiency and covering the entire axle body inspection of axles of different lengths. After the ultrasonic inspection is completed, the support arm 3 rises to allow the placement component 4 to support the axle. The clamping components 1 and 2 move away from each other. Then, the placement component 4 further lifts the inspected wheel and rises again. After it rises out of the water, the equipment stops operating and waits for the transfer tool to move the axle to the next process.

[0036] like Figures 1-5As shown, in this embodiment, both the first clamping assembly and the second clamping assembly include a rotating member 9, a friction disk 10, and a center positioning member 11. The friction disk 10 and the center positioning member 11 are disposed on one axial end of the rotating member 9. The friction disk 10 is used to contact the end of the axle to be inspected, and the center positioning member 11 is used to contact the center of the end face of the axle to be inspected. The center positioning member 11 can move axially relative to the friction disk 10. In the free state, the center positioning member 11 protrudes axially from the friction disk 10 to cooperate with the center hole of the end face of the axle to be inspected. In this embodiment, the long shaft drive assembly includes a motor 12 and a coupling 13. The motor 12 and the coupling 13 are connected in a transmission manner, and the connecting shaft and the rotating component 9 are connected in a transmission manner. The friction disc 10 and the rotating component 9 are connected by bolts. Therefore, when the motor 12 is activated, power can be transmitted to the transmission component through the coupling 13, thereby realizing the rotation of the friction disc 10. After the two friction discs 10 clamp the shaft to be inspected, the rotation drive of the shaft to be inspected is realized. In this embodiment, only the rotating component 9 of the clamping assembly one is connected in a transmission manner to the motor 12. That is to say, the transmission component of the clamping assembly one is equivalent to the driving component, while the transmission component of the clamping assembly two is equivalent to the driven component, thereby satisfying the rotation of the shaft to be inspected.

[0037] Furthermore, the rotating component 9 is provided with a mounting cavity, and an elastic element 14 is provided in the mounting cavity along the opening direction of the long axis clamping assembly. A portion of the structure of the center positioning element 11 is located in the mounting cavity and is connected to the elastic element 14. Specifically, a movable seat 15 is slidably fitted in the mounting cavity, and the movable seat 15 is connected to the center positioning element 11. The center positioning element 11 is located in the middle position of the friction disk 10 at the same end, thereby better aligning with the centerline of the axle to be inspected while meeting the coincidence requirement between the centerline of the axle to be inspected and the rotation centerline, thus better meeting the concentricity rotation requirements and avoiding rotational wobbling. At the same time, the center hole of the axle to be inspected is used for positioning, and the axle to be inspected is clamped by the center positioning element 11. The clamping force is provided by the elastic element 14, so the elastic force is controllable and will not damage the equipment or the axle to be inspected.

[0038] After the two friction discs 10 clamp the axle, the center positioning parts 11 corresponding to the two friction discs 10 move with the moving seat 15 in their respective mounting cavities, so that the contact surface of the friction discs 10 can fully contact the end door of the axle, so as to better transmit the power from the motor 12.

[0039] In this embodiment, the clamping assembly one and clamping assembly two further include a rotary seat 16, and the rotating member 9 is rotatably mounted on the movable base 6 via the rotary seat 16. A bearing component is provided between the rotary seat 16 and the rotating member 9, and the end of the rotating member 9 near the friction disc 10 is connected to the rotary seat 16 via a rotating sealing seat. The bearing component provided between the rotary seat 16 and the rotating base includes a deep groove ball bearing and a double-row tapered roller bearing to achieve rotation at different speeds and ensure smooth rotation.

[0040] Thus, the rotary seat 16 is mounted on the movable base 6, and the rotary seat 16 is rotatably connected to the rotating member 9 on its inner side, with a bearing component provided between the rotary seat 16 and the rotating member 9; most of the structure of the rotating member 9 is located inside the rotary seat 16, with its end connected to the motor 12, and a small portion of the structure of the rotating member 9 is located outside the rotary seat 16, with its end connected to the friction disc 10, and the center positioning member 11 in the mounting cavity of the rotating member 9 protruding from its end face. An elastic element 14 is provided in the mounting cavity of the rotating member 9 to connect to the movable base 15, thereby achieving force pushing against the center positioning member 11. Furthermore, in the opening direction of the long shaft clamping assembly, an elastic element 2 17 is provided between the friction disc 10 and the rotating member 9 of at least one of the clamping assemblies one and two. Specifically, in this embodiment, the clamping assembly one is driven by a long shaft drive assembly, causing the friction disc 10 of the clamping assembly one to move actively. The clamping assembly two is not driven by a power device, so the friction disc 10 of the clamping assembly two moves passively. Since the clamping assembly one is provided with an elastic element two 17, the clamping assembly two does not need to be provided with an elastic element two 17. In this embodiment, the above structure is simple, effectively saving assembly costs and assembly time, and can also ensure stable clamping and driving rotation of the shaft to be inspected. Similarly, the rotation driving force of the shaft to be inspected is driven by the motor 12 to drive the friction disc 10 to rotate the shaft to be inspected. The friction force between the friction disc 10 and the shaft is provided by the elastic element two 17. The elastic force is controllable and will not damage the equipment or the shaft to be inspected.

[0041] In this embodiment, the lifting assembly is used to support and lift the target object. Its movable support arm 3 is inserted into the water tank 1 and contacts the target object through its end-mounted placement member 4. By inserting only the movable part of the lifting assembly into the water tank 1, the risk of water ingress into the lifting assembly is reduced. Furthermore, by providing a sealing component between the support arm 3 and the water tank 1, a seal is achieved at the connection between the water tank 1 and the support arm 3, preventing water from the water tank 1 from entering the lifting assembly. This connection structure effectively solves the problems of waterproofing and sealing.

[0042] Since the support arm 3 needs to extend and retract relative to the main body of the lifting component to achieve lifting, there may be a situation where impurities in the liquid in the water tank 1 are carried into the sealing surface between the sealing component and the support arm 3. When impurities enter the sealing surface, the sealing surface will be damaged, resulting in a reduction in the sealing performance between the support arm 3 and the sealing component. The impurities will also be carried into the drive cylinder of the lifting component, causing damage and water leakage.

[0043] like Figures 6-9 As shown, in this embodiment, the support arm 3 and the water tank 1 are sealed together by a sealing assembly. The sealing assembly includes a water curtain sealing assembly and a sealing connection assembly. The sealing connection assembly is connected between the support arm 3 and the water tank 1. The water curtain sealing assembly is connected to the sealing connection assembly along the axial direction of the support arm 3. The water curtain sealing assembly and the support arm 3 are spaced apart to form an annular water outlet gap 18. High-pressure water is introduced into the water outlet gap 18 so that the high-pressure water is sprayed out towards the inside of the water tank 1 to form an annular high-pressure water curtain distributed along the circumference of the support arm 3. Further, the water curtain sealing assembly is provided with a water passage, or a water passage is formed between the water curtain sealing assembly and the sealing connection assembly. The water passage includes an annular rectifying cavity 19 located outside the water outlet gap 18. The annular rectifying cavity 19 communicates with the water outlet gap 18 so that after the high-pressure water is introduced into the water passage, the high-pressure water is shaped by the annular rectifying cavity 19 and then sprayed out from the water outlet gap 18.

[0044] The sealing assembly is divided into a sealing connection assembly and a water curtain sealing assembly. The sealing connection assembly is connected between the support arm 3 and the water tank 1, which can play a sliding sealing role and block the part of the water tank 1 that is penetrated by the support arm 3 to prevent water leakage. The water curtain sealing assembly works in conjunction with the sealing connection assembly. The gap between the water curtain sealing assembly and the sealing connection assembly is set on the outside of the support arm 3, and the gap between the water curtain sealing assembly and the support arm 3 serves as the water outlet gap 18 to form a water curtain. The water passage of the water curtain sealing assembly is used for high-pressure water flow. The water passage is connected to the outlet gap 18. Since the water passage includes an annular rectifying cavity 19 connected to the outlet gap 18, the annular rectifying cavity 19 can be filled with high-pressure water. After being filled, the water flow is simultaneously shaped to facilitate the formation of a water curtain, and then enters the outlet gap 18 from the periphery. In this way, when the high-pressure water flow, or positive pressure water flow, passes through the water passage and is ejected from the outlet gap 18, it can be sprayed towards the inside of the water tank 1 to form an annular high-pressure water curtain distributed along the circumferential direction of the support arm 3. The annular high-pressure water curtain can interact with the support arm 3. The support arm 3 contacts the surface to wash away impurities and prevent liquid containing impurities from entering the sealing gap or sealing surface between the support arm 3 and the sealing connection assembly. Thus, a seal is achieved by blocking the annular high-pressure water curtain. Furthermore, the water curtain sealing assembly and the sealing connection assembly are connected to block the channel between the water curtain sealing assembly and the sealing connection assembly that leads to the sealing gap or sealing surface. The water can only enter the sealing gap or sealing surface through the water outlet gap 18. However, since the water outlet gap 18 blocks the channel after forming the annular high-pressure water curtain, an effective blocking effect can be achieved.

[0045] It can be understood that the water passage can be constructed on the water curtain sealing assembly. In this case, the connection between the water curtain sealing assembly and the sealing connection assembly is a sealed connection, blocking the channel for liquid in the water tank 1 to enter the sealing gap in the radial direction. The water passage can also be formed by the water curtain sealing assembly and the sealing connection assembly at a partial interval between them, forming an annular rectifier cavity 19. This facilitates the passage of impurities through the annular rectifier cavity 19 between the water curtain sealing assembly and the sealing connection assembly. Even if impurities enter between the water curtain sealing assembly and the sealing connection assembly, they can be ejected with the high-pressure water flow.

[0046] Through the above technical solution, the movable support arm 3 of the lifting assembly is inserted into the water tank 1 to support the axle. Under the sealing effect of the sealing assembly, the sealing connection assembly can achieve a sealed connection between the support arm 3 and the water tank 1. The water curtain sealing assembly can simultaneously spray an annular high-pressure water curtain around the support arm 3 along the axial direction. The annular high-pressure water curtain can prevent impurities in the water tank 1 from being brought into the drive cylinder of the lifting assembly, such as the electric cylinder, when the support arm 3 retracts, thus protecting the sealing surface between the support arm 3 and the sealing connection assembly. Moreover, the lifting assembly can also avoid the problems of manual removal or placement of the water tank 1, which is labor-intensive and involves contact with the liquid in the water tank 1, thus improving work efficiency.

[0047] In some embodiments, the water curtain sealing assembly includes an annular water outlet component 20 having the water passage, the annular water outlet component 20 being gapped and fitted onto the outside of the support arm 3 to form a water outlet gap 18, and the water passage further includes a water inlet channel provided in the annular water outlet component 20.

[0048] An annular water outlet component 20, equipped with a water passage, is spaced and fitted onto the outside of the support arm 3, facilitating the formation of an outlet gap 18. The annular rectifying cavity 19 of the water passage can be located inside the annular water outlet component 20 or between the annular water outlet component 20 and the sealing connection assembly. High-pressure water can be injected through the water inlet channel; this high-pressure water is preferably filtered, clean, high-pressure water. Specifically, the water inlet channel is also connected to a water nozzle component 21, which communicates with the water inlet channel to facilitate the connection of the high-pressure water source and the injection of the high-pressure water flow.

[0049] In this embodiment, when a water passage is formed between the water curtain sealing assembly and the sealing connection assembly, a flat space is formed between them, and this flat space is configured as an annular rectifier cavity 19. In different technical solutions of this embodiment, the flat space can be formed in several ways. One is that grooves are provided on opposite sides of both the water curtain sealing assembly and the sealing connection assembly, forming a flat space between the two grooves. Another is that a groove is provided on the side of one of the water curtain sealing assembly and the sealing connection assembly facing the other, i.e., a flat space is formed between the groove and its opposite component surface.

[0050] In this embodiment, a water passage is formed between the water curtain sealing assembly and the sealing connection assembly. The annular rectifier cavity 19 is formed by the annular groove at the bottom of the annular water outlet component 20 and the top of the sealing connection assembly. This avoids the problem of high processing cost caused by machining the annular rectifier cavity 19 in the annular water outlet component 20, and also facilitates the maintenance of the annular rectifier cavity 19. It is more convenient and can also block the channel between the annular water outlet component 20 and the sealing connection assembly in the radial direction.

[0051] To better achieve the formation of an annular high-pressure water curtain in the circumferential direction of the support arm 3, the water outlet gap 18 extends along the axial direction of the mechanical arm to form a guide structure for the high-pressure water flow to be sprayed out along the axial direction of the support arm 3.

[0052] By extending the water outlet gap 18 axially, it is easier for the water sprayed from the water outlet gap 18 to form an annular high-pressure water curtain that is axial and fits the circumferential surface of the support arm 3. This allows the annular high-pressure water curtain to spray a longer length along the circumferential surface of the support arm 3, thereby improving the barrier sealing effect and making it more difficult for impurities in the water to enter the sealing gap.

[0053] In this embodiment, the sealing connection assembly includes a sealing sleeve 22, which is the main sealing component. It is disposed on the water tank 1 and slides in cooperation with the support arm 3. A sealing component is provided between the sealing sleeve 22 and the support arm 3 to further ensure the sliding sealing effect.

[0054] like Figure 8 and Figure 9 As shown, the sealing connection assembly further includes a dustproof seal 23. Specifically, the sealing component includes a dustproof seal 23, which slides in conjunction with the support arm 3. The dustproof seal 23 has a blocking portion extending axially into the water outlet gap 18 along the support arm 3 to introduce the high-pressure water flow in the annular rectifier cavity 19 into the water outlet gap 18. The dustproof seal 23 is configured for dustproof sealing. By setting it at one end of the sealing gap near the water outlet gap 18, it can play a blocking role. By designing it with a blocking portion extending out of the sealing sleeve 22 and into the water outlet gap 18, the blocking portion can block the high-pressure water flow perpendicular to the support arm 3 while adhering to the support arm 3, and guide it towards the water outlet gap 18. This can greatly improve the blocking effect on impurities and prevent high-pressure water flow from entering the sealing gap.

[0055] In this embodiment, the sealing component one further includes a shaft support ring 24 and a waterproof sealing ring 25. The shaft support ring facilitates the formation of support between the sealing sleeve 22 and the support arm 3. Several waterproof sealing rings 25 are provided to play a waterproof role and prevent water from entering the drive cylinder of the lifting assembly.

[0056] To achieve a sealed connection between the sealing sleeve 22 and the bottom of the water tank 1, a connection hole is provided at the bottom of the water tank 1. This connection hole facilitates the installation of the sealing assembly. The sealing sleeve 22 is disposed within the connection hole and connected to the tank wall surrounding the connection hole via a connecting assembly. The connecting assembly includes an annular connecting member 26 and an annular connecting seat 27. The annular connecting seat 27 is connected to the tank wall surrounding the connection hole. The annular connecting member 26 is connected to the inner side of the annular connecting seat 27, and the sealing sleeve 22 is connected to the annular connecting member 26 and located inside the annular connecting seat 27. A second sealing component is provided between the annular connecting member 26 and the annular connecting seat 27, and between the sealing sleeve 22 and the annular connecting member 26, thus achieving a better seal. Specifically, the second sealing component can be an O-ring.

[0057] In this embodiment, the drive cylinder of the lifting assembly is a linear drive component, which drives the support arm 3 to extend and retract, thereby switching the position of the axle to be inspected. The drive cylinder can be an electric cylinder, a hydraulic cylinder, a pneumatic cylinder, etc. In this embodiment, there are two lifting assemblies, that is, there are two support arms 3, both of which are driven to lift by electric cylinders, which has the advantages of high synchronization and high positioning accuracy.

[0058] Therefore, when using this embodiment, the water tank 1 is used to hold the coupling agent for ultrasonic testing, and the support arm 3 of the lifting assembly can be switched between the pick-up / placement position, the transfer position, and the avoidance position. When the support arm 3 is in the pick-up / placement position, the placement component 4 is located outside the water tank 1. When the support arm 3 is in the transfer position, the placement component 4 is located inside the water tank 1. When the support arm 3 is in the avoidance position, the placement component 4 is located inside the water tank 1 and is a certain distance below the axle.

[0059] Water tank 1 holds the coupling agent used for ultrasonic testing. Support arm 3 moves vertically up and down, moving between the pick-up / placement position, the transfer position, and the avoidance position. In the pick-up / placement position, support arm 3 rises, placing component 4 outside water tank 1. At this time, the axle to be inspected can be removed from the placement component 4 using a transfer tool. In the transfer position, support arm 3 descends into water tank 1, placing the axle to be inspected in the clamping position. The two ends of the axle are clamped by clamping components one and two, which are set in water tank 1 and corresponding to the transfer position. At this time, the long shaft drive component moves, causing the axle to rotate. Simultaneously, non-destructive testing is performed in conjunction with the detection probe. After the axle to be inspected is clamped by the long shaft clamping component, support arm 3 continues to descend to move away from the axle to the avoidance position, thereby avoiding interference from the axle rotation, interference from the detection probe movement, and preventing false signals from the sensors set on the V-block. After the inspection is completed, the support arm 3 switches from the avoidance position to the transfer position to receive the axle, and then switches to the pick-and-place position, where the inspected axle is removed using a transfer tool. Thus, this embodiment enables automatic lifting and support during the axle inspection process, avoiding the time-consuming, labor-intensive, and inefficient problems of manual operation. Furthermore, the underwater sealing component forms an annular high-pressure water curtain to prevent impurities in the water tank 1 from entering the sealing surface and / or the drive cylinder, resulting in a better sealing connection between the support arm 3 and the water tank 1 and more stable equipment operation.

[0060] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be considered as limitations on the present invention, and the scope of protection of the present invention should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A water immersion flaw detection device for long shafts, characterized in that, include: Water tank, used to hold coupling water; A lifting assembly, the lifting assembly including a support arm that extends into the water tank and can be lifted and lowered, and a storage component is provided on the support arm; A long shaft clamping assembly, comprising a first clamping assembly and a second clamping assembly, wherein the first clamping assembly and the second clamping assembly are movable relative to each other to clamp the long shaft between the first clamping assembly and the second clamping assembly. A long shaft drive assembly, which is driveably connected to clamping assembly one and / or clamping assembly two, wherein the long shaft drive assembly actuates to drive a long shaft clamped between clamping assembly one and clamping assembly two to rotate about its axis; and A robotic arm equipped with a detection probe is used to drive the detection probe to perform flaw detection on the long shaft in a water tank containing coupling water.

2. The water immersion flaw detection equipment for long shafts as described in claim 1, characterized in that, Both the clamping assembly one and the clamping assembly two include: The rotating component, friction disk, and center positioning component are provided. The friction disk and center positioning component are disposed on one end of the rotating component in the axial direction. The friction disk is used to contact the end of the long shaft, and the center positioning component is used to contact the center of the end face of the long shaft. The central positioning member is axially movable relative to the friction disk. In its free state, the central positioning member protrudes axially from the friction disk to engage with the central hole on the end face of the long shaft.

3. The water immersion flaw detection equipment for long shafts as described in claim 2, characterized in that, The rotating component is provided with a mounting cavity, and an elastic element is provided in the mounting cavity along the opening direction of the long axis clamping assembly. A part of the structure of the central positioning component is located in the mounting cavity, and this part of the structure is connected to the elastic element.

4. The water immersion flaw detection equipment for long shafts as described in claim 2, characterized in that, The clamping assembly one and clamping assembly two also include: A movable base and a rotary base, wherein the rotating component is rotatably mounted on the movable base via the rotary base, and the movable base is slidably mounted on a guide rail provided along the opening direction of the long axis clamping assembly; A bearing component is provided between the rotary seat and the rotating component, and the end of the rotating component near the friction disc is connected to the rotary seat through a rotating sealing seat.

5. The water immersion flaw detection equipment for long shafts as described in claim 2, characterized in that, In the opening direction of the long shaft clamping assembly, at least one of the clamping assemblies one and two is provided with an elastic element two between the friction disc and the rotating component.

6. The water immersion flaw detection equipment for long shafts as described in claim 1, characterized in that, The support arm and the water tank are sealed together by a sealing assembly; The sealing assembly includes a water curtain sealing assembly and a sealing connection assembly. The sealing connection assembly is connected between the support arm and the water tank. The water curtain sealing assembly is engaged with the sealing connection assembly along the axial direction of the support arm. The water curtain sealing assembly and the support arm are spaced apart to form an annular water outlet gap. High-pressure water is introduced into the water outlet gap so that the high-pressure water is sprayed out into the water tank to form a ring-shaped high-pressure water curtain distributed along the circumference of the support arm.

7. The water immersion flaw detection equipment for long shafts as described in claim 6, characterized in that, The water curtain sealing assembly is provided with a water passage, or a water passage is formed between the water curtain sealing assembly and the sealing connection assembly; The water passage includes an annular rectifying cavity located outside the water outlet gap. The annular rectifying cavity is connected to the water outlet gap so that after high-pressure water is introduced into the water passage, the high-pressure water is shaped by the annular rectifying cavity and then ejected from the water outlet gap.

8. The water immersion flaw detection equipment for long shafts as described in claim 7, characterized in that, The water curtain sealing assembly includes an annular water outlet component with the water passage, the annular water outlet component being gapped and fitted onto the outside of the support arm to form a water outlet gap, and the water passage also includes a water inlet channel provided in the annular water outlet component. When a water passage is formed between the water curtain sealing assembly and the sealing connection assembly, a flat space is formed between the water curtain sealing assembly and the sealing connection assembly, and the flat space is configured as an annular rectifier cavity.

9. The water immersion flaw detection equipment for long shafts as described in claim 7, characterized in that, The sealing connection assembly includes a dustproof seal, which slides in conjunction with the support arm. The dustproof seal has a blocking portion that extends axially into the water outlet gap along the support arm to introduce high-pressure water flow from the annular rectifier cavity into the water outlet gap.

10. The water immersion flaw detection equipment for long shafts as described in claim 6, characterized in that, The water outlet gap extends along the axial direction of the robotic arm to form a guide structure for high-pressure water to be ejected along the axial direction of the support arm.

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