Multi-angle coupling scanning mechanism of ultrasonic flaw detector

Abstract

The invention belongs to the technical field of nondestructive testing, and particularly relates to a multi-angle coupling scanning mechanism of an ultrasonic flaw detector, which comprises a machine body connected with a probe; the top of the support is bent to form a folding part, a conical bag body is embedded in a bending gap in the bottom of the folding part, one end, far away from the support, of the folding part is connected with a soft rubber part, a soft rubber sleeve used for wrapping the probe is integrally formed at the end of the soft rubber part, and the soft rubber sleeve is communicated with the conical bag body and is used for spraying a coupling agent; the multi-angle support arm is arranged between the base and the negative pressure disc and is used for supporting angle adjustment; wherein the center of the base is provided with an air exhaust disc, an air suction port is connected with an air exhaust pipe, and the negative pressure disc comprises a supporting disc, and an inner storage disc, a sponge pad and a placement disc which are sequentially stacked and mounted in the supporting disc. According to the invention, multi-angle scanning detection can be carried out on a workpiece, meanwhile, a coupling agent can be supplied autonomously, continuous adding in the detection process is not needed, the detection efficiency is improved, and meanwhile, the coupling agent is prevented from polluting the working space.

Description

Technical Field

[0001] This invention belongs to the field of nondestructive testing technology, specifically relating to a multi-angle coupling scanning mechanism for an ultrasonic flaw detector. Background Technology

[0002] An ultrasonic flaw detector is a precision instrument that uses ultrasonic technology to perform non-destructive testing on materials or workpieces, enabling efficient and accurate detection of internal defects. The ultrasonic flaw detector emits high-frequency sound waves (typically 1-5MHz) into the material being tested, utilizing the propagation characteristics of ultrasonic waves for detection: The reflection principle: When ultrasonic waves encounter interfaces between different media (such as cracks or pores) or the bottom surface of a material, reflection occurs due to differences in acoustic impedance. The instrument calculates the location and size of the defect by receiving the time difference and amplitude changes of the reflected waves.

[0003] There are many types of ultrasonic flaw detectors, but the most widely used is the handheld ultrasonic flaw detector. It emits and receives reflected waves through a single probe and is suitable for detecting near-surface defects. It is generally used to detect flaws in small workpieces.

[0004] In actual testing, workers usually hold an ultrasonic flaw detector in one hand and hold the test probe in the other hand to place it on the surface of the workpiece for testing. However, this method of operation is not conducive to multi-angle scanning and testing of the workpiece. In addition, the test probe usually needs to be used with a coupling agent, otherwise the detection accuracy will be greatly reduced. This method of operation is also quite troublesome to add coupling agent, and the coupling agent will also contaminate the workspace. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-angle coupling scanning mechanism for an ultrasonic flaw detector, which provides operators with more operating space, enabling them to perform multi-angle scanning and inspection of workpieces. At the same time, it can automatically supply coupling agent without the need for continuous addition during the inspection process, thereby improving inspection efficiency and avoiding coupling agent contamination of the workspace.

[0006] The specific technical solution adopted by this invention is as follows: A multi-angle coupling scanning mechanism for an ultrasonic flaw detector, comprising: The machine body is connected to a probe; The bracket has a folded part at the top, and a conical capsule is embedded in the folded part at the bottom. A soft rubber part is connected to the end of the folded part away from the bracket. A soft rubber sleeve for wrapping the probe is integrally formed at the end of the soft rubber part. The soft rubber sleeve is connected to the conical capsule for spraying coupling agent. The base and the negative pressure plate, and the multi-angle support arm between them for angle adjustment; The base has a vacuum plate at its center and a vacuum pipe connected to the suction port. The negative pressure plate includes a support plate and an inner storage plate, a sponge pad, and a placement plate stacked in sequence within the support plate. The vacuum pipe is connected to the inner storage plate and is used to negatively adsorb the workpiece placed on the placement plate, so that it is immersed in the coupling agent in the sponge pad.

[0007] As a preferred embodiment, the folded part is elastically connected at the bend, a storage plate for winding the wire harness is attached to the side wall of the bend gap at the top of the folded part, and an upper baffle is formed by bending the top of the bracket, with a limiting groove on it for limiting the connection head.

[0008] As a preferred embodiment, the soft rubber part and the soft rubber sleeve are integrally molded and made of a gel material. The soft rubber sleeve has an annular cavity for spraying coupling agent. A support sleeve is embedded in an annular array at the bottom of the annular cavity. A ball bearing protruding from the bottom surface of the soft rubber sleeve is rolled into the bottom of the support sleeve. A limit spring is embedded between the top of the ball bearing and the top wall of the support sleeve. A through hole is provided on the outer wall of the support sleeve for the coupling agent to pass through.

[0009] As a preferred embodiment, the inner storage tray has an integrally formed annular partition plate that separates a liquid storage chamber for receiving the coupling agent and an air suction chamber for evacuation. The outer wall of the inner storage tray has an integrally formed exhaust port that communicates with the air suction pipe. The outer wall of the annular partition plate has an integrally formed liquid supply port for supplying the coupling agent, which extends to the outside of the inner storage tray. The bottom of the sponge pad is raised in an arc-shaped manner and embedded in the liquid storage chamber so that its interior is wetted with coupling agent.

[0010] As a preferred embodiment, the base has a negative pressure cavity inside, and a pumping mechanism for supplying coupling agent to the negative pressure plate is installed inside the cavity. The pumping mechanism includes a lower bladder and an upper bladder stacked vertically, and a central support plate disposed between the two. The central support plate is fixedly installed on the side wall of the negative pressure cavity. A connecting pipe is provided between the lower bladder and the upper bladder to communicate with each other. The upper bladder is provided with a liquid outlet and connected to a liquid infusion pipe. The liquid infusion pipe is connected to the liquid supply port for supplying coupling agent.

[0011] As a preferred embodiment, a sealing gasket is affixed to the top of the negative pressure cavity, and an upper pressure plate, which is bonded to the sealing gasket, is fixedly installed on the top of the upper bladder to squeeze the upper bladder and expel the coupling agent when under negative pressure.

[0012] As a preferred embodiment, the bottom surface of the upper pressure plate is integrally formed with a support sleeve, and a support column is fixedly installed on the top surface of the central support plate corresponding to the support sleeve. The support sleeve is slidably sleeved on the support column and has a reset spring embedded therein. Liquid one-way valves are installed on both the connecting pipe and the infusion pipe.

[0013] As a preferred embodiment, the bottom of the suction plate is provided with a suction hole for gas absorption, the bottom edge of the base is fixed with a sealing ring for adsorption onto the placement plane, and a connecting groove is also provided on one side of the base for connection with the bracket.

[0014] As a preferred embodiment, the multi-angle support arm includes a bottom support arm fixedly installed at the center of the suction plate and a top support arm fixedly installed at the center of the bottom surface of the support plate. A connecting plate is fixedly installed on the bottom support arm, and a central support arm is movably connected to the connecting plate via a universal joint. The top end of the central support arm is movably connected to the top support arm via a universal joint. An upper hydraulic damping support arm is installed in a circumferential array at the bottom of the support plate. The end of the upper hydraulic damping support arm away from the support plate is rotatably connected to a lower movable arm via a ball joint. The end of the lower movable arm away from the upper hydraulic damping support arm is rotatably connected to the connecting plate via a ball joint.

[0015] As a preferred embodiment, the suction tube is made of corrugated tubing, and the infusion tube is covered with corrugated tubing. The two are arranged in a circumferential array between the support plate and the base to support and limit the position of the support plate.

[0016] The technical effects achieved by this invention are as follows: This invention provides support for the machine body by setting up a bracket. The folding part not only allows the wire harness to be gathered and extended according to the operation steps, but also utilizes the conical capsule, soft rubber part and soft rubber sleeve to supply coupling agent during the detection process by squeezing the conical capsule and using the soft rubber sleeve. This allows the coupling agent to fill the detection gap between the probe and the workpiece under the action of detection pressure, making the addition of coupling agent more convenient, improving detection efficiency and accuracy, and increasing the operating space for the operator.

[0017] This invention, by combining a base, a negative pressure plate, and a multi-angle support arm, enables the negative pressure plate to position and adsorb the workpiece for inspection, keeping it stable during inspection. Meanwhile, the multi-angle support arm can adjust the placement angle of the workpiece as needed, thereby achieving multi-angle scanning and inspection, improving inspection accuracy and convenience.

[0018] This invention, by setting up a pumping mechanism in conjunction with a negative pressure plate, can use negative pressure to squeeze the coupling agent into the storage chamber during the adsorption of the workpiece and wet the sponge pad. Thus, when the workpiece is adsorbed on the surface of the placement plate and the sponge pad is squeezed, the coupling agent can overflow and wet the workpiece, thereby filling the gap between the probe and the workpiece during the detection process, ensuring detection accuracy, while avoiding the diffusion of coupling agent and contamination of the working environment. After the detection is completed, it can be re-absorbed into the sponge pad for recycling. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the bracket in an embodiment of the present invention; Figure 3 This is a side sectional view of the bracket in an embodiment of the present invention; Figure 4 This is the present invention. Figure 3 A magnified view of part A in the middle; Figure 5 This is a schematic diagram of the combined structure of the base, negative pressure plate, and multi-angle support arm in an embodiment of the present invention; Figure 6 This is a partial structural diagram of the base, negative pressure plate, and multi-angle support arm in an embodiment of the present invention; Figure 7 This is another partial structural diagram of the base, negative pressure plate, and multi-angle support arm in an embodiment of the present invention; Figure 8 This is the present invention. Figure 7 A magnified view of part B in the middle; Figure 9 This is the present invention. Figure 7 A magnified view of a portion of C; Figure 10 This is the present invention. Figure 5 Top sectional view; Figure 11 This is an exploded view of the negative pressure plate in an embodiment of the present invention; Figure 12 This is the present invention. Figure 10 A magnified view of a portion of C; Figure 13 This is a three-dimensional structural diagram of the pumping mechanism in an embodiment of the present invention.

[0020] The attached diagram lists the components represented by each number as follows: 1. Organism; 11. Probe; 2. Bracket; 21. Folding section; 22. Conical bladder body; 23. Soft rubber section; 24. Soft rubber sleeve; 241. Annular cavity; 242. Support sleeve; 243. Ball bearing; 244. Limiting spring; 245. Through hole; 25. Storage plate; 26. Limiting groove; 3. Base; 31. Evacuation plate; 32. Sealing ring; 33. Evacuation pipe; 34. Connecting groove; 35. Negative pressure cavity; 36. Sealing gasket; 4. Negative pressure plate; 41. Support plate; 42. Inner storage plate; 421. Annular partition plate; 422. Suction chamber; 423. Liquid storage chamber; 424. Exhaust port; 425. Liquid supply port; 43. Sponge pad; 44. Placement plate; 5. Multi-angle outrigger; 51. Bottom support arm; 52. Center support arm; 53. Lower movable arm; 54. Upper hydraulic damping support arm; 55. Top support arm; 56. Connecting plate; 6. Pumping mechanism; 61. Lower bladder body; 62. Upper bladder body; 63. Central support plate; 64. Upper pressure plate; 65. Support sleeve; 66. Support column; 67. Return spring; 68. Connecting tube; 69. Infusion tube. Detailed Implementation

[0021] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0022] like Figures 1-13 As shown, an ultrasonic flaw detector multi-angle coupling scanning mechanism includes a body 1, a support 2 for placing the body 1, a base 3 and a negative pressure plate 4, and a multi-angle support arm 5 disposed between the two for supporting angle adjustment; a probe 11 for ultrasonic testing is connected to the body 1 via a data cable. By placing the body 1 on the support 2, the operator's hands can be freed, and the workpiece to be tested can be placed on the negative pressure plate 4 for positioning and support. Then, the placement angle can be adjusted by using the multi-angle support arm 5, thereby achieving multi-angle coupling scanning in conjunction with the probe 11 and the coupling agent.

[0023] See attached document Figure 2 and Figure 3 The top of the support 2 is bent to form a folded part 21, which is corrugated and forms a triangular folding gap. The folded part 21 is elastically connected at the bend (using elastic colloid or elastic metal for connection). The part is made of rigid plate, which allows it to fold and shrink under external pressure, and can also gradually straighten into a long strip under external stretching.

[0024] The folded part 21 has a conical capsule 22 embedded in the bottom bend gap, and the end of the folded part 21 away from the bracket 2 is connected to a soft rubber part 23. A soft rubber sleeve 24 for wrapping the probe 11 is integrally formed at the end of the soft rubber part 23, so that the probe 11 can be embedded inside the soft rubber sleeve 24. This not only protects the probe, but also connects the soft rubber sleeve 24 to the conical capsule 22. During use, the conical capsule 22 can be squeezed by the folded part 21 to spray coupling agent, filling the space between the probe 11 and the workpiece to be tested. This eliminates the air gap between the two, ensuring that the sound waves can be efficiently transmitted into the material, thereby ensuring the detection accuracy.

[0025] It should be noted that the soft rubber part 23 and the soft rubber sleeve 24 are integrally molded structures and are made of a gel material. The soft rubber part 23 has an infusion channel inside, which can supply coupling agent to the soft rubber sleeve 24. The structure of the gel material allows the soft rubber sleeve 24 to deform according to the shape of the probe 11, thereby tightly wrapping the surface of the probe 11 and forming a protective layer. At the same time, it can achieve good compatibility when using multiple probes 11. In this embodiment, the probe 11 is cylindrical and can be adapted. In other embodiments, if the probe 11 is square, it can also be adapted.

[0026] For further details, please refer to the appendix. Figure 5 To prevent coupling agent leakage and ensure timely spraying of the coupling agent, an annular cavity 241 for spraying the coupling agent is provided inside the soft rubber sleeve 24. A support sleeve 242 is embedded in an annular array at the bottom of the annular cavity 241, and a ball bearing 243 protruding from the bottom surface of the soft rubber sleeve 24 is rolled into the bottom of the support sleeve 242. A limit spring 244 is embedded between the top of the ball bearing 243 and the top wall of the support sleeve 242, and a through hole 245 for the coupling agent to pass through is provided on the outer wall of the support sleeve 242. The bottom plane of the probe 11 is kept flush with the ground plane of the soft rubber sleeve 24. When inspecting the workpiece and pressing the probe 11 onto the workpiece surface, the ball bearing 243... The ball bearing 243 will be compressed and contracted into the support sleeve 242, compressing the limiting spring 244. This allows the coupling agent to seep out from the support sleeve 242 through the through hole 245 and spray between the probe 11 and the workpiece. After the probe 11 is removed after the test, the ball bearing 243 will return to its original position under the compression and rebound force of the limiting spring 244, which can seal the through hole 245 to prevent coupling agent leakage. At the same time, it ensures that the coupling spray and the test are synchronized, making it more convenient to use. In addition, the ball bearing 243 allows the probe 11 to slide quickly on the surface of the workpiece, thereby uniformly coating the coupling agent, ensuring the stability and efficiency of the scan, and reducing the sliding friction.

[0027] Furthermore, a storage plate 25 for winding the wire harness is attached to the side wall of the bending gap at the top of the folding part 21. The wire harness can be embedded into the storage plate 25 and the side wall of the folding part 21, thereby achieving the gathering of the wire harness and avoiding interference caused by the wire harness during the detection process. At the same time, the wire harness can change with the extension or contraction of the folding part 21 during the detection process, making it more suitable for the detection. Meanwhile, the top of the bracket 2 is bent to form an upper baffle, and a limiting groove 26 is opened on it. This can limit the connector connected to the body 1 when the body 1 is placed on the bracket 2, preventing the data cable from breaking off due to pulling, thereby ensuring the stability of the probe 11 during the detection process and preventing it from easily disconnecting from the body 1.

[0028] See attached document Figure 5 and Figure 6 The base 3 has an air extraction plate 31 at its center, which is connected to a vacuum pumping device through an air extraction port. It can remove air from the cavity as needed. At the same time, an air extraction pipe 33 is connected to the suction port, which is used to connect to the negative pressure plate 4 to adsorb the workpiece and position it through negative pressure.

[0029] To make the base 3 more stable, the bottom of the suction plate 31 is provided with a suction hole for gas absorption. At the same time, a sealing ring 32 (made of rubber material with a certain degree of flexibility) is fixed to the bottom edge of the base 3. When the suction plate 31 is connected to a vacuum pump for exhaust, the air between the sealing ring 32 and the placement surface can be discharged. This allows the base 3 to be stably adsorbed onto the placement surface using negative pressure, making it more stable and maintaining the stability of the device during use.

[0030] See attached document Figure 10 and Figure 11 The negative pressure plate 4 includes a support plate 41 and an inner storage plate 42, a sponge pad 43, and a placement plate 44 stacked sequentially within the support plate 41. The inner storage plate 42 has an integrally formed annular partition plate 421 that separates the inner and outer spaces. The central space is a liquid storage chamber 423 for receiving coupling agent, and the outer space is an air suction chamber 422 for evacuating air. An exhaust port 424 is integrally formed on the outer wall of the inner storage plate 42 and is connected to an air suction pipe 33. External air can be drawn away through the air suction pipe 33, the air suction chamber 422, the sponge pad 43, and the placement plate 44, thereby using negative pressure to position the workpiece placed on the surface of the placement plate 44.

[0031] Furthermore, the outer wall of the annular partition plate 421 is integrally formed with a liquid supply port 425 for supplying coupling agent, which extends to the outside of the inner storage plate 42. The bottom of the sponge pad 43 is raised in an arc-shaped shape and embedded in the liquid storage cavity 423. After sufficient coupling agent is filled into the liquid storage cavity 423 through the liquid supply port 425, the sponge pad 43 can be immersed in the coupling agent, thereby making its interior wetted with coupling agent. When the workpiece is placed on the placement plate 44 under negative pressure, the workpiece will continuously squeeze the placement plate 44 and the sponge pad 43, thereby causing the sponge pad 43 to deform and squeeze out the coupling agent. This allows the coupling agent to flow out through the vent holes on the surface of the placement plate 44 and wrap around the workpiece, thereby making the workpiece wetted in the coupling agent in the sponge pad 43. This ensures that the gap between the probe 11 and the workpiece during the continuous movement of the probe 11 during the detection is fully filled, ensuring the stability and accuracy of the scanning.

[0032] It should be noted that by dividing the internal space of the inner storage plate 42 into a liquid storage chamber 423 for receiving the coupling agent and an air suction chamber 422 for venting, the coupling agent inside the liquid storage chamber 423 will not be drawn out during exhaust, and the coupling agent will not block the air from being discharged. This ensures that the two do not interfere with each other during operation, making the device more stable in use.

[0033] See attached document Figure 10 , Figure 12 as well as Figure 13 In order to continuously supply coupling agent into the storage chamber 423 during the detection process, a negative pressure cavity 35 is provided inside the base 3, and a pumping mechanism 6 for supplying coupling agent to the negative pressure plate 4 is installed inside it.

[0034] The pumping mechanism 6 includes a vertically stacked lower bladder 61, an upper bladder 62, and a central support plate 63 disposed between them. The central support plate 63 is fixedly installed on the side wall of the negative pressure cavity 35, providing internal support for the lower bladder 61 and the upper bladder 62 and separating them. The upper bladder 62 has a liquid outlet hole connected to a delivery pipe 69, which is connected to the liquid supply port 425. The upper bladder 62 can be continuously squeezed to expel the coupling agent inside and supply the coupling agent into the storage cavity 423. Furthermore, a connecting pipe 68 is provided between the lower bladder 61 and the upper bladder 62 to connect them. Thus, as the coupling agent in the upper bladder 62 is continuously used, it is continuously replenished through the lower bladder 61 and the connecting pipe 68.

[0035] Furthermore, by sealing the top of the negative pressure cavity 35 with a sealing gasket 36 and fixing the top of the upper bladder 62 with an upper pressure plate 64 that is bonded to the sealing gasket 36, the air inside the negative pressure cavity 35 can be simultaneously discharged when the suction plate 31 is connected to the vacuum pumping equipment for evacuation, thereby creating a negative pressure inside. Then, the external atmospheric pressure is used to squeeze the sealing gasket 36 and the upper pressure plate 64, causing the upper bladder 62 to be continuously compressed. This squeezes the upper bladder 62 to squeeze out the coupling agent and supply it to the storage chamber 423 through the infusion tube 69. This ensures that the supply and detection of the coupling agent are synchronized, avoiding the waste of coupling agent and the problem of untimely supply.

[0036] Furthermore, to ensure the upper capsule 62 returns to its original position after use, a support sleeve 65 is integrally formed on the bottom surface of the upper pressure plate 64. A support column 66 is fixedly installed on the top surface of the central support plate 63 corresponding to the support sleeve 65. The support sleeve 65 is slidably sleeved on the support column 66 and has a reset spring 67 embedded in it. In this way, under negative pressure, the upper pressure plate 64 can continuously squeeze the upper capsule 62 and compress the reset spring 67. After the test is completed and the negative pressure disappears, the upper pressure plate 64 can return to its original position under the action of the spring force, thereby generating a negative suction force. This force can draw out the coupling agent in the lower capsule 61 through the connecting pipe 68 to replenish the upper capsule 62. At the same time, the lower capsule 61 is compressed, thus continuously replenishing the coupling agent in the upper capsule 62 in this cycle.

[0037] It should be noted that both the connecting tube 68 and the infusion tube 69 are equipped with liquid one-way valves, so that the coupling agent can only flow in one direction when replenishing the coupling agent, thereby ensuring the feasibility of replenishing the coupling agent. At the same time, the bottom of the lower bladder 61 is provided with a coupling agent replenishment port, which extends to the outside of the base 3, so that the coupling agent can be replenished in time when needed.

[0038] See attached document Figures 6-9 The multi-angle support arm 5 includes a bottom support arm 51 fixedly installed at the center of the suction plate 31 and a top support arm 55 fixedly installed at the center of the bottom surface of the support plate 41. A connecting plate 56 is fixedly installed on the bottom support arm 51. A central support arm 52 is movably connected to the connecting plate 56 via a universal joint, and the top of the central support arm 52 is movably connected to the top support arm 55 via a universal joint. An upper hydraulic damping support arm 54 is installed in a circumferential array at the bottom of the support plate 41. A lower movable arm 53 is rotatably connected to the end of the upper hydraulic damping support arm 54 away from the support plate 41 via a ball joint. The end of the lower movable arm 53 away from the upper hydraulic damping support arm 54 is rotatably connected to the connecting plate 56 via a ball joint. A multi-degree-of-freedom swingable support can be formed between the support plate 41 and the base 3. During the detection process, the negative pressure plate 4 can be swung by external force to change to the required angle, thereby realizing multi-angle detection.

[0039] It should be noted that in this embodiment, there are three sets of lower movable arms 53 and upper hydraulic damping arms 54 arranged in a circumferential array between the support plate 41 and the base 3, thereby supporting the negative pressure plate 4 in three-dimensional space. The central support arm 52 and the top support arm 55 are connected by a universal joint. At the same time, the universal joint connection between the top support arm 55 and the connecting plate 56 allows the negative pressure plate 4 to swing in six degrees of freedom in three-dimensional space relative to the base 3. Meanwhile, the three sets of lower movable arms 53 and upper hydraulic damping arms 54 support and stabilize the negative pressure plate 4 after swinging, thereby realizing the six-degree-of-freedom spatial swing of the negative pressure plate 4 during the detection process.

[0040] Furthermore, by setting the suction pipe 33 to be made of corrugated tubing, and simultaneously attaching a corrugated tubing to the infusion pipe 69 (made of rubber and capable of being bent at will), and circumferentially arranging the two between the support plate 41 and the base 3, two sets of suction pipe 33 are provided, and one set of infusion pipe 69 is provided, forming a tripod structure. Utilizing its material properties, it can deform with the six degrees of freedom swing of the negative pressure plate 4, and after deformation, it supports and limits the support plate 41, ensuring the support stability of the negative pressure plate 4.

[0041] See attached document Figure 1 as well as Figure 5 The base 3 has a connecting groove 34 on one side for connecting with the bracket 2. When the two are used together, the bottom foot of the bracket 2 can be inserted into the connecting groove 34 so that the two can maintain a relatively stable state and the relative position remains unchanged so that they can work together.

[0042] Of course, in other embodiments, the relevant components of the bracket 2 and the base 3 can be used separately. The bracket 2 can be used alone to support the machine body 1, and the relevant components of the base 3 can also be used alone to position the workpiece.

[0043] The working principle of this invention is as follows: When in use, firstly, the machine body 1 is placed on the support 2, and the probe 11 is embedded into the soft rubber sleeve 24 so that the bottom surfaces of the two are flush. The workpiece is placed on the surface of the placement tray 44. When the workpiece is placed on the placement tray 44 by negative pressure adsorption, the workpiece will continuously squeeze the placement tray 44 and the sponge pad 43, thereby causing the sponge pad 43 to deform and squeeze out the coupling agent, which flows out through the vent holes on the surface of the placement tray 44 to wrap the workpiece, thereby immersing the workpiece in the coupling agent in the sponge pad 43. Secondly, when the probe 11 is pressed against the surface of the workpiece, the ball 243 is squeezed and retracted into the support sleeve 242, compressing the limiting spring 244, and simultaneously squeezing the conical capsule 22 through the folding part 21 to squeeze out the coupling agent inside, and then conveying it into the soft rubber sleeve 24 through the soft rubber part 23, so that the coupling agent can seep out from the support sleeve 242 through the through hole 245 and spray between the probe 11 and the workpiece, thereby filling the tiny gaps in the detection process.

[0044] Secondly, after the probe 11 is picked up after the test, the ball 243 is reset by the compression and rebound force of the limit spring 244, which can seal the through hole 245 to prevent the coupling agent from leaking. At the same time, it ensures that the coupling spray and the test are synchronized, making it more convenient to use. In addition, the setting of the ball 243 allows the probe 11 to slide quickly on the surface of the workpiece, ensuring the stability and efficiency of the scan.

[0045] Finally, during the testing process, the negative pressure plate 4 can be continuously adjusted to the required relative angle by the multi-angle support arm 5, while the pumping mechanism 6 continuously supplies coupling agent into the negative pressure plate 4 during the testing process, thereby ensuring sufficient coupling agent.

[0046] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A multi-angle coupling scanning mechanism for an ultrasonic flaw detector, characterized in that, include: The body (1) is connected to a probe (11); The bracket (2) has a folded part (21) formed by bending at the top. A conical capsule (22) is embedded in the bending gap at the bottom of the folded part (21). A soft rubber part (23) is connected to one end of the folded part (21) away from the bracket (2). A soft rubber sleeve (24) for wrapping the probe (11) is integrally formed at the end of the soft rubber part (23). The soft rubber sleeve (24) is connected to the conical capsule (22) for spraying coupling agent. The base (3) and the negative pressure plate (4) and the multi-angle support arm (5) set between the two for supporting angle adjustment. The base (3) has a suction plate (31) at its center and a suction pipe (33) connected to the suction port. The negative pressure plate (4) includes a support plate (41) and an inner storage plate (42), a sponge pad (43) and a placement plate (44) stacked in sequence in the support plate (41). The suction pipe (33) is connected to the inner storage plate (42) for negative pressure adsorption of the workpiece placed on the placement plate (44) so ​​that it is immersed in the coupling agent in the sponge pad (43).

2. The ultrasonic flaw detector multi-angle coupling scanning mechanism according to claim 1, characterized in that: The folded part (21) is elastically connected at the bend. A storage plate (25) for winding the wire harness is pasted on the side wall of the bend gap at the top of the folded part (21). The bracket (2) is bent at the top to form an upper baffle, and a limiting groove (26) for limiting the connector is opened on it.

3. The ultrasonic flaw detector multi-angle coupling scanning mechanism according to claim 1, characterized in that: The soft rubber part (23) and the soft rubber sleeve (24) are integrally formed and made of a gel material. The soft rubber sleeve (24) has an annular cavity (241) for spraying coupling agent. The bottom of the annular cavity (241) is embedded with a support sleeve (242) in an annular array. The bottom of the support sleeve (242) has a ball (243) that protrudes from the bottom surface of the soft rubber sleeve (24). The top of the ball (243) is embedded between the top of the ball and the top wall of the support sleeve (242). The outer wall of the support sleeve (242) has a through hole (245) for the coupling agent to pass through.

4. The ultrasonic flaw detector multi-angle coupling scanning mechanism according to claim 1, characterized in that: The inner storage tray (42) has an integrally formed annular partition plate (421) that separates a liquid storage chamber (423) for receiving coupling agent and an air suction chamber (422) for evacuation. The outer wall of the inner storage tray (42) has an integrally formed exhaust port (424) that communicates with the air suction pipe (33). The outer wall of the annular partition plate (421) has an integrally formed liquid supply port (425) for supplying coupling agent and extends to the outside of the inner storage tray (42). The bottom of the sponge pad (43) is raised in an arc-shaped shape and embedded in the liquid storage chamber (423) so that its interior is wetted with coupling agent.

5. The ultrasonic flaw detector multi-angle coupling scanning mechanism according to claim 4, characterized in that: The base (3) has a negative pressure cavity (35) inside, and a pumping mechanism (6) is installed inside to supply coupling agent to the negative pressure plate (4). The pumping mechanism (6) includes a lower bladder (61) and an upper bladder (62) stacked vertically, and a central support plate (63) disposed between the two. The central support plate (63) is fixedly installed on the side wall of the negative pressure cavity (35). A connecting pipe (68) is provided between the lower bladder (61) and the upper bladder (62) to communicate with each other. The upper bladder (62) is provided with a liquid outlet and connected to a delivery pipe (69). The delivery pipe (69) is connected to the liquid supply port (425) for supplying coupling agent.

6. The ultrasonic flaw detector multi-angle coupling scanning mechanism according to claim 5, characterized in that: The top of the negative pressure cavity (35) is sealed with a sealing gasket (36), and the top of the upper bladder (62) is fixedly installed with an upper pressure plate (64) that is bonded to the sealing gasket (36) so that the coupling agent is squeezed out when the upper bladder (62) is under negative pressure.

7. The ultrasonic flaw detector multi-angle coupling scanning mechanism according to claim 6, characterized in that: The bottom surface of the upper pressure plate (64) is integrally formed with a support sleeve (65). The top surface of the central support plate (63) is fixedly installed with a support column (66) corresponding to the support sleeve (65). The support sleeve (65) is slidably sleeved on the support column (66) and a return spring (67) is embedded therein. Liquid check valves are installed on both the connecting pipe (68) and the infusion pipe (69).

8. The ultrasonic flaw detector multi-angle coupling scanning mechanism according to claim 1, characterized in that: The bottom of the suction plate (31) is provided with a suction hole for gas absorption. The bottom edge of the base (3) is fixed with a sealing ring (32) for adsorption on the placement plane. The side of the base (3) is also provided with a connecting groove (34) for connecting with the bracket (2).

9. The multi-angle coupling scanning mechanism of an ultrasonic flaw detector according to claim 1, characterized in that: The multi-angle support arm (5) includes a bottom support arm (51) fixedly installed at the center of the suction plate (31) and a top support arm (55) fixedly installed at the center of the bottom surface of the support plate (41). A connecting plate (56) is fixedly installed on the bottom support arm (51). A central support arm (52) is movably connected to the connecting plate (56) via a universal joint. The top end of the central support arm (52) is movably connected to the top support arm (55) via a universal joint. An upper hydraulic damping support arm (54) is installed in a circumferential array at the bottom of the support plate (41). A lower movable arm (53) is rotatably connected to the end of the upper hydraulic damping support arm (54) away from the support plate (41) via a ball joint. The end of the lower movable arm (53) away from the upper hydraulic damping support arm (54) is rotatably connected to the connecting plate (56) via a ball joint.

10. The multi-angle coupling scanning mechanism of an ultrasonic flaw detector according to claim 5, characterized in that: The suction pipe (33) is made of corrugated hose material, and the infusion pipe (69) is covered with corrugated hose. The two are arranged in a circumferential array between the support plate (41) and the base (3) to support and limit the support plate (41).

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