A pressure vessel weld inspection detection mechanism

Abstract

The utility model relates to the technical field of flaw detection, and disclose a kind of pressure vessel weld flaw detection inspection detection mechanism, comprising: truss, truss is equipped with sliding table, generator is fixedly installed in sliding table, and generator is connected with probe;Adjusting assembly is arranged below sliding table for installing probe, adjusting assembly includes first lifting seat, second lifting seat, guide rod, spring and seat head, first lifting seat is arranged below sliding table and can be lifted, first lifting seat is slidably connected four second lifting seats, by the spring providing buffer pressure of four corners independent setting, and the universal rotation structure of the spherical body and the ball socket is formed, so that seat head and probe can be omnidirectionally self-adapting curvature variation of pressure vessel surface and weld's excess height fluctuation, which ensures that probe and detection area always maintain stable, close contact, provides key guarantee for stable transmission of ultrasonic signal, significantly improves the reliability and consistency of detection data.

Description

Technical Field

[0001] This utility model relates to the field of flaw detection technology, and in particular to a flaw detection and inspection mechanism for pressure vessel welds. Background Technology

[0002] As pressure-bearing equipment, the quality of the welds of pressure vessels directly affects the safe operation and service life of the equipment.

[0003] A search revealed a prior art device and method for inspecting weld flaws in pressure vessels (Publication No.: CN115494156B), belonging to the technical field of pressure vessel weld inspection equipment. It mainly includes a support unit and a sliding assembly mounted on the support unit. A load-bearing spray mechanism is mounted on the sliding assembly, and a pressure vessel is placed on the load-bearing spray mechanism. A drive unit is mounted on the support unit and fixed to the load-bearing spray mechanism, used to drive the load-bearing spray mechanism to slide on the sliding assembly. A detection component is mounted on the support unit, used for ultrasonic testing of the circumferential welds of the pressure vessel.

[0004] The angle, pressure, and movement speed of the probe depend entirely on the operator's experience, resulting in poor consistency of test results. Secondly, for large pressure vessels, the testing efficiency is low, and working at height or in confined spaces poses safety risks to personnel. Furthermore, the application and control of the coupling agent are often not precise enough, which can easily lead to misjudgment or missed detection due to poor coupling.

[0005] Therefore, we propose a pressure vessel weld flaw detection and inspection organization. Utility Model Content

[0006] The present invention mainly addresses the technical problem of poor adaptability between the probe and the workpiece, and provides a pressure vessel weld flaw detection and inspection mechanism.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a pressure vessel weld flaw detection and inspection mechanism, comprising: A truss, wherein a slide is mounted on the truss, a generator is fixedly mounted on the slide, and a probe is connected to the generator; An adjustment assembly is installed below the slide table to mount a probe. The adjustment assembly includes a first lifting seat, a second lifting seat, a guide rod, a spring, and a seat head. The first lifting seat is slidably installed below the slide table. The first lifting seat is slidably connected to four second lifting seats. Each second lifting seat is fitted with a spring. The second lifting seats are fixedly connected to the lower end of the guide rod. The seat head is rotatably installed below the second lifting seats. The probe is installed inside the cavity of the seat head.

[0008] In a preferred embodiment of this utility model, an electric actuator is installed on the top of the slide table, and the first lifting seat is fixedly connected to the output shaft of the electric actuator.

[0009] In a preferred embodiment of this utility model, the first lifting seat has sliding holes at its four corners, the guide rod is slidably disposed in the sliding holes, and the spring is located between the second lifting seat and the first lifting seat.

[0010] In a preferred embodiment of the present invention, the adjusting assembly further includes a ball and a socket, wherein the ball is fixedly connected to the bottom of the guide rod, the socket is fixedly connected to the top of the seat head, and the ball and the socket are rotatably connected.

[0011] In a preferred embodiment of this utility model, the head is formed into a hollow shell at the bottom, and the probe is installed on the inner top surface of the head.

[0012] In a preferred embodiment of this utility model, the adjustment assembly further includes a delivery pipe, which is fixedly installed on the side wall of the seat head and is connected to the cavity of the seat head.

[0013] In a preferred embodiment of this utility model, the adjustment component further includes a sealing strip, a plug rod, and a drain groove. The plug rod is fixedly connected to the sealing strip, and a plug hole is provided at the lower end of the seat head. The plug rod is interference-fitted with the plug hole and inserted. Several drain grooves are provided at the lower end of the sealing strip, and the sealing strip is a U-shaped rubber strip.

[0014] In a preferred embodiment of this invention, the adjustment assembly further includes an airbag, which is fixedly mounted on the inner top surface of the seat head. The airbag surrounds the probe and can be compressed and deformed.

[0015] This utility model provides a pressure vessel weld flaw detection and inspection mechanism. It has the following beneficial effects: 1. This pressure vessel weld flaw detection and inspection mechanism, through the independent second lifting seats at the four corners, with springs providing buffer pressure, and the omnidirectional rotating structure composed of a ball and a ball socket, enables the seat head and probe to adapt to the curvature changes of the pressure vessel surface and the undulations of the weld height in all directions. This ensures that the probe and the inspection area always maintain stable and close contact, providing a key guarantee for the stable transmission of ultrasonic signals and significantly improving the reliability and consistency of the inspection data.

[0016] 2. This pressure vessel weld flaw detection and inspection mechanism connects to an external pump via a delivery pipe, automatically injecting couplant into the head cavity. The air bladder surrounding the probe buffers pressure changes in the couplant and promotes its uniform distribution. The replaceable sealing strip at the bottom forms a flexible sealing cavity with the workpiece surface, effectively preventing couplant leakage. This ensures both coupling effect and avoids contamination. The drainage groove design allows for timely discharge of excess couplant or microbubbles, further optimizing the acoustic coupling environment. Attached Figure Description

[0017] Figure 1 This is one of the overall perspective views of this utility model; Figure 2 This is the second overall perspective view of the present utility model; Figure 3 This is a three-dimensional view of the adjustment component and probe of this utility model; Figure 4 This is a schematic diagram of the probe and mounting head of this utility model; Figure 5 This is a planar schematic diagram of the sealing strip of this utility model.

[0018] Legend: 10. Truss; 11. Slide table; 12. Generator; 13. Probe; 20. First lifting seat; 21. Second lifting seat; 22. Guide rod; 23. Spring; 24. Seat head; 25. Ball; 26. Ball socket; 27. Conveying pipe; 28. Sealing strip; 29. ​​Insert rod; 30. Drainage groove; 31. Airbag. Detailed Implementation

[0019] A pressure vessel weld flaw detection and inspection organization, such as Figure 1 As shown, it includes: Truss 10, the truss 10 is equipped with a slide table 11, the slide table 11 is fixedly equipped with a generator 12, and the generator 12 is connected to a probe 13; like Figure 2 and Figure 3As shown, an adjustment assembly is installed below the slide table 11 with a mounting probe 13. The adjustment assembly includes a first lifting seat 20, a second lifting seat 21, a guide rod 22, a spring 23, and a seat head 24. The first lifting seat 20 is slidably installed below the slide table 11. The first lifting seat 20 is slidably connected to four second lifting seats 21. Each second lifting seat 21 is fitted with a spring 23. The second lifting seats 21 are fixedly connected to the lower end of the guide rod 22. The seat head 24 is omnidirectionally installed below the second lifting seats 21. The probe 13 is installed in the cavity of the seat head 24. An electric push rod is installed on the top of the slide table 11. The first lifting seat 20 is fixedly connected to the output shaft of the electric push rod. Sliding holes are opened at the four corners of the first lifting seat 20. The guide rod 22 is slidably installed in the sliding holes. The spring 23 is located between the second lifting seats 21 and the first lifting seat 20. The seat head 24 forms a hollow shell at the bottom. The probe 13 is installed on the inner top surface of the seat head 24. In this scheme, the slide table 11 is pushed to move along the truss 10 by the truss 10, and the electric push rod on the slide table 11 can push the first lifting seat 20 to rise and fall. The second lifting seat 21 is pushed down by the spring 23 so that the seat head 24 floats within a certain range. The probe 13 located at the bottom of the seat head 24 can float in the vertical direction to adapt to the surface of the workpiece.

[0020] like Figure 3 As shown, the adjustment assembly also includes a ball 25 and a socket 26. The ball 25 is fixedly connected to the bottom of the guide rod 22, and the socket 26 is fixedly connected to the top of the head 24. The ball 25 and the socket 26 are rotatably connected. By rotating the mutually adapted ball 25 and socket 26, the head 24 can be rotated in all directions, thereby ensuring the degree of contact between the probe 13 and the workpiece surface.

[0021] like Figure 4 As shown, the adjustment assembly also includes a delivery pipe 27. The delivery pipe 27 is fixedly installed on the side wall of the head 24. The delivery pipe 27 is connected to the cavity of the head 24. The delivery pipe 27 is used to connect to a delivery pump. The delivery pump injects the coupling agent into the cavity of the head 24 through the delivery pipe 27 to ensure the stability of signal transmission between the probe 13 and the workpiece.

[0022] like Figure 4 and Figure 5As shown, the adjustment assembly also includes a sealing strip 28, a plug rod 29, and a drain groove 30. The plug rod 29 is fixedly connected to the sealing strip 28. The lower end of the seat head 24 has a plug hole. The plug rod 29 is interference-fitted with the plug hole and plugged in. The lower end of the sealing strip 28 has several drain grooves 30. The sealing strip 28 is a U-shaped rubber strip. By setting the sealing strip 28 with silicone, a flexible layer is formed between the lower end of the seat head 24 and the workpiece, avoiding scratching the workpiece. At the same time, the sealing strip 28 can be easily replaced by plugging the plug rod 29 into the plug hole. The drain groove 30 at the bottom of the sealing strip 28 is used to drain excess coupling agent in the cavity of the seat head 24.

[0023] like Figure 4 As shown, the adjustment assembly also includes an airbag 31. The airbag 31 is fixedly installed on the inner top surface of the head 24. The airbag 31 surrounds the probe 13. The airbag 31 can be squeezed and deformed. By setting a hollow and inflatable airbag 31, the airbag 31 is located above the delivery tube 27. When the delivery tube 27 injects the coupling agent into the cavity of the head 24, the airbag 31 is squeezed and contracted. As the head 24 moves on the surface of the workpiece, the coupling agent is consumed. The expansion of the airbag 31 can push the coupling agent stored in the cavity of the head 24 to the space between the probe 13 and the workpiece.

[0024] The working principle of this utility model: Through the control system command, the slide table 11 moves along the truss 10 to the starting position of the target weld area. The electric actuator drives the first lifting seat 20 to descend as a whole, which drives the four second lifting seats 21 below it to move down synchronously until the sealing strips 28 at the bottom of all the seats 24 contact the surface of the pressure vessel. Under the action of the spring 23, each second lifting seat 21 can independently make a slight up and down movement to compensate for the macroscopic curvature of the container. Through the universal rotation of the ball 25 and the ball socket 26, each seat 24 can adapt to the microscopic unevenness of the local area below it, ensuring that the emitting surface of the probe 13 maintains the best parallel relationship with the workpiece surface. At the same time, the coupling agent is injected into the sealing cavity of the seat 24 through the delivery pipe 27. The air bag 31 is compressed under the hydraulic pressure of the coupling agent, and the cavity is filled with coupling agent, effectively eliminating the air between the probe and the workpiece surface and forming a stable sound wave transmission channel.

[0025] While maintaining stable coupling between the probe and the surface, the slide table 11 moves along the truss 10 along a preset path and speed, driving the probe 13 to scan the weld. The ultrasonic generator 12 excites the probe 13 to generate ultrasonic waves and receives the returned echo signals. The coupling state is stable throughout the process, and the acquired signal quality is high, which is convenient for subsequent analysis and defect assessment.

[0026] During the scanning process, the sealing strip 28 maintains a continuous flexible seal with the workpiece surface to prevent the coupling agent from being lost too quickly. A small amount of excess coupling agent or any tiny air bubbles that may be generated can be discharged in an orderly manner through the drainage groove 30 at the bottom of the sealing strip, avoiding accumulation in the sealed cavity that may affect the detection.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure vessel weld flaw detection and inspection mechanism, characterized in that, include: A truss (10) is equipped with a slide (11), and a generator (12) is fixedly installed on the slide (11). The generator (12) is connected to a probe (13). An adjustment assembly is set below the slide (11) for mounting the probe (13). The adjustment assembly includes a first lifting seat (20), a second lifting seat (21), a guide rod (22), a spring (23), and a seat head (24). The first lifting seat (20) is slidably set below the slide (11). The first lifting seat (20) is slidably connected to four second lifting seats (21). Each second lifting seat (21) is fitted with a spring (23). The second lifting seat (21) is fixedly connected to the lower end of the guide rod (22). The seat head (24) is omnidirectionally rotatably set below the second lifting seat (21). The probe (13) is installed in the cavity of the seat head (24).

2. The pressure vessel weld flaw detection and inspection mechanism according to claim 1, characterized in that: An electric actuator is installed on the top of the slide (11), and the first lifting seat (20) is fixedly connected to the output shaft of the electric actuator.

3. The pressure vessel weld flaw detection and inspection mechanism according to claim 1, characterized in that: The first lifting seat (20) has sliding holes at its four corners, the guide rod (22) is slidably disposed in the sliding holes, and the spring (23) is located between the second lifting seat (21) and the first lifting seat (20).

4. The pressure vessel weld flaw detection and inspection mechanism according to claim 1, characterized in that: The adjustment assembly also includes a ball (25) and a socket (26). The ball (25) is fixedly connected to the bottom of the guide rod (22), and the socket (26) is fixedly connected to the top of the seat head (24). The ball (25) and the socket (26) are rotatably connected.

5. The pressure vessel weld flaw detection and inspection mechanism according to claim 1, characterized in that: The head (24) forms a hollow shell at the bottom, and the probe (13) is installed on the inner top surface of the head (24).

6. The pressure vessel weld flaw detection and inspection mechanism according to claim 1, characterized in that: The adjustment assembly also includes a delivery pipe (27), which is fixedly installed on the side wall of the seat (24) and is connected to the chamber of the seat (24).

7. The pressure vessel weld flaw detection and inspection mechanism according to claim 1, characterized in that: The adjustment assembly also includes a sealing strip (28), a plug rod (29), and a drain groove (30). The plug rod (29) is fixedly connected to the sealing strip (28). The lower end of the seat head (24) is provided with a plug hole. The plug rod (29) is interference-fitted with the plug hole and inserted. The lower end of the sealing strip (28) is provided with several drain grooves (30). The sealing strip (28) is a U-shaped rubber strip.

8. The pressure vessel weld flaw detection and inspection mechanism according to claim 1, characterized in that: The adjustment assembly also includes an airbag (31), which is fixedly mounted on the inner top surface of the head (24). The airbag (31) surrounds the probe (13) and can be squeezed and deformed.

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