A high-precision non-destructive inspection equipment for pressure vessel welds

Abstract

This invention relates to the field of non-destructive testing technology and discloses a high-precision non-destructive testing device for pressure vessel welds, comprising: a guide plate fixedly connected to the side end of a probe, a connecting plate fixedly connected to the top end of the probe, a buffer rod hinged to the top end of the connecting plate, an offset column sleeved and connected to the buffer rod, a buffer spring provided in the inner cavity of the offset column, a spherical rotating ball fixedly connected to the top end of the offset column, a positioning column at the top of the offset column, a rotating groove opened inside the positioning column, an offset groove communicating with the inner cavity of the rotating groove opened at the bottom of the positioning column, and the bottom end of the positioning column fixedly connected to the connecting plate through a return spring; the probe pulls the buffer rod through the connecting plate, and the buffer rod drives the offset column to rotate and offset by abutting against the inner wall of the offset column, the buffer rod extends from the inner wall of the offset column, and the offset column rotates along the inner wall of the offset groove in the opposite direction to the probe movement, thereby eliminating the displacement difference between the probe and the support mechanism.

Description

Technical Field

[0001] This invention belongs to the field of non-destructive testing technology, specifically relating to a high-precision non-destructive testing device for pressure vessel welds. Background Technology

[0002] Pressure vessels are widely used in petroleum, chemical, and energy industries, and their structural safety is directly related to production safety. During the manufacturing and use of pressure vessels, the welds are generally divided into longitudinal welds and circumferential welds. Due to the discontinuity of materials in the weld area, defects such as cracks, porosity, and incomplete penetration are prone to occur. Therefore, non-destructive testing methods such as ultrasonic testing and eddy current testing are usually required to inspect the welds.

[0003] In the prior art, for non-destructive testing of circumferential welds of pressure vessels, a detection probe mounted on a traveling mechanism is typically used to scan along the weld path. An elastic loading structure is used to make the probe contact the weld surface, and a coupling medium is set between the probe and the weld to achieve effective transmission of the detection signal.

[0004] However, in actual testing, since the welds of pressure vessels are mostly located on curved surfaces and the curvature varies at different locations, the probe's fit is prone to change as it moves with the traveling mechanism. In existing equipment, the probe's fit is independent of the traveling mechanism's motion. When the probe has poor fit, the traveling mechanism still maintains its predetermined motion state, causing the probe to fail to recover its fit in time, thus affecting the stability of the testing process and the accuracy of the test results.

[0005] Therefore, how to establish a coordinated relationship between the probe's contact state and the equipment's movement state during the inspection of curved weld seams, so as to achieve adaptive adjustment of the movement state when the contact state changes, thereby maintaining stable inspection conditions, has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] This invention provides a high-precision non-destructive testing device for pressure vessel welds, solving the technical problem in related technologies where the probe achieves adaptive adjustment of its motion state when performing non-destructive testing on curved weld surfaces.

[0007] This invention provides a high-precision non-destructive testing device for pressure vessel welds, comprising: The probe has a guide plate fixedly connected to its side and a connecting plate fixedly connected to its top. The guide plate is arc-shaped at the end furthest from the probe. Wedge-shaped blocking plates are fixedly connected to both ends of the guide plate. A buffer rod is hinged to the top of the connecting plate. An offset column is sleeved and connected to a buffer rod. A buffer spring is provided inside the offset column. A spherical rotating ball is fixedly connected to the top of the offset column. A positioning column is provided at the top of the offset column. A rotating groove is opened inside the positioning column. An offset groove communicating with the inner cavity of the rotating groove is opened at the bottom of the positioning column. The bottom end of the positioning column is fixedly connected to the connecting plate through a return spring. The rotating ball is embedded in the inner cavity of the rotating groove. Two side walls of the offset column are in contact with the inner wall of the offset groove, while the other two side walls of the offset column are arc-shaped and do not contact the inner wall of the offset groove. The support plate has a positioning platform fixedly connected to its top. The side of the support plate is mounted on the drive mechanism via a support mechanism. The positioning platform is fixed to the positioning column via a lifting mechanism.

[0008] In a preferred embodiment, the positioning platform and the support plate are provided with a plurality of positioning grooves, which form an integral whole within the positioning platform and the support plate. The top of the positioning platform is provided with a limiting hole communicating with the inner cavity of the positioning groove. A positioning post is slidably connected to the inner wall of the positioning groove, and a limiting rod is provided at the top of the positioning post. The limiting rod is threadedly connected to the inner wall of the limiting hole.

[0009] In a preferred embodiment, a positioning cover is installed on the top of the positioning platform, a limiting plate is fixedly connected to the top of the limiting rod, a limiting seat is fixedly connected to the bottom of the limiting rod, a limiting groove is opened on the top of the positioning column along the axis of the limiting rod, and the limiting seat is embedded in the inner cavity of the limiting groove and is rotatably connected to the inner wall of the limiting groove.

[0010] In a preferred embodiment, a limiting pad is fixedly connected to the inner cavity of the positioning cover. The limiting pad has several positioning holes along its length. The limiting pad is abutted against the top of the positioning platform. Several limiting protrusions with arc-shaped cross sections are fixedly connected at equal intervals around the periphery of the limiting plate along the axis. The limiting protrusions abut against the inner wall of the positioning holes.

[0011] In a preferred embodiment, the support plate has side plates fixedly connected to both sides at the end away from the positioning table. A storage box is rotatably connected between the two sets of side plates. The side plates have connecting holes. The storage box is rotatably connected to the inner wall of the connecting holes through a connecting seat. The storage box has an applicator roller at the end away from the positioning table. The bottom of the storage box has an adsorption port that communicates with the inner cavity of the storage box. The side end of the connecting seat is rotatably connected to the side plate. The applicator roller is located at the bottom of the storage box and is rotatably connected to the bottom of the storage box and fits against the adsorption port.

[0012] In a preferred embodiment, a fixing hole penetrating the side plate is provided inside the storage box, the axis of the fixing hole coincides with the axis of the connecting seat, and a fixing screw is threaded onto the inner wall of the fixing hole.

[0013] In a preferred embodiment, an applicator shaft is fixedly connected to the inner wall of the applicator roller, and rotating holes are respectively opened on both sides of the bottom of the storage box. The two ends of the applicator shaft are rotatably connected to the inner wall of the rotating holes. Several pairs of interfaces are equidistantly opened at both ends of the applicator shaft along the axis line. Several adsorption holes are opened in the center of the applicator shaft. The pairs of interfaces and adsorption holes are respectively connected to the inner cavity of the applicator shaft. Connection ports are respectively opened on both sides of the bottom of the storage box, and the upper and lower ends of the connection ports are respectively connected to the inner cavity of the storage box and the inner cavity of the rotating holes.

[0014] In a preferred embodiment, the drive mechanism includes a support ring, a support frame, and a driver. One end of the support ring is fixedly connected to the support frame, and the other end of the support ring is mounted and connected to the driver via a guide rail. The side end of the driver is fixedly connected to the support plate via the support mechanism. The support mechanism includes a support platform, an adjustment seat, and a support rod. The bottom end of the support platform is fixedly connected to the top end of the driver. The support platform has an adjustment groove along the height direction. The adjustment seat is embedded in the inner cavity of the adjustment groove and is slidably connected to the inner wall of the adjustment groove. Both ends of the support rod are fixedly connected to the adjustment seat and the support plate, respectively.

[0015] In a preferred embodiment, the inner cavity of the adjusting groove is provided with an adjusting rod, the adjusting seat is provided with an adjusting hole along the axis of the adjusting rod, the adjusting rod is threadedly connected to the inner wall of the adjusting hole, and the bottom end of the adjusting rod is rotatably connected to the support platform.

[0016] In a preferred embodiment, a guide ruler is fixedly connected to one end of the adjusting seat that protrudes from the support platform, and the guide ruler is slidably connected to the surface of the support platform.

[0017] The beneficial effects of this invention are as follows: 1. This invention utilizes a positioning column, a rotating ball, and an offset column. When the displacement of the probe increases, the probe pulls a buffer rod via a connecting plate. The buffer rod, by abutting against the inner wall of the offset column, causes the offset column to rotate and offset. The buffer rod extends from the inner wall of the offset column, and the offset column rotates along the inner wall of the offset groove in the opposite direction to the probe's movement. The offset column drives the rotating ball to rotate along the inner wall of the rotating groove. The rotating ball, by abutting against the inner wall of the rotating groove, provides a limiting effect for the offset column, thereby eliminating the displacement difference between the probe and the support mechanism.

[0018] 2. In this invention, the reset is initiated by a reset spring. The support mechanism moves the positioning column steadily, the reset spring accelerates the movement of the connecting plate, and the connecting plate accelerates the movement of the buffer rod. The buffer rod abuts against the inner wall of the offset column, thereby driving the offset column to reset. The buffer rod slides along the inner wall of the offset column to reset.

[0019] 3. In this invention, the connecting plate drives the buffer rod to rotate. When the curvature of the annular weld decreases, the displacement of the probe is less than the displacement of the support mechanism. The probe will tilt at the end of the moving direction, and the buffer rod will start to extend into the offset column. At the same time, the offset column rotates in the direction of probe movement, thereby eliminating the displacement difference between the probe and the support mechanism.

[0020] 4. In this invention, the buffer spring is always in a compressed state, and the offset column is always restrained by the rotating ball and the inner wall of the rotating groove to achieve the limiting effect of the positioning column. The elastic force provided by the buffer spring acts on the connecting plate through the buffer rod and is then transmitted to the probe, so that the probe can always fit against the circumferential weld. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the support platform structure of the present invention; Figure 3 This is a schematic diagram of the adjusting seat structure of the present invention; Figure 4 This is a schematic diagram of the support plate structure of the present invention; Figure 5 This is a front view of the support plate structure of the present invention; Figure 6 For the present invention Figure 5 A cross-sectional view of the support plate structure (AA); Figure 7 For the present invention Figure 5 BB cross-sectional view of the support plate structure; Figure 8 For the present invention Figure 5 CC section view of the support plate structure; Figure 9 For the present invention Figure 6 Enlarged schematic diagram of the structure at point D; Figure 10 This is a schematic diagram of the positioning stage structure of the present invention; Figure 11 This is a schematic diagram of the positioning column structure of the present invention; Figure 12 This is a schematic diagram of the offset column structure of the present invention; Figure 13 This is a schematic diagram of the storage box structure of the present invention; Figure 14 This is a schematic diagram of the coating shaft structure of the present invention; Figure 15 This is a schematic diagram of the offset groove structure of the present invention.

[0022] In the diagram: 1. Support ring; 2. Guide rail; 3. Support frame; 4. Driver; 5. Support platform; 6. Adjustment groove; 7. Adjustment rod; 8. Adjustment seat; 9. Support rod; 10. Support plate; 11. Guide ruler; 12. Adjustment hole; 13. Positioning platform; 14. Positioning cover; 15. Side plate; 16. Storage box; 17. Application roller; 18. Probe; 19. Positioning post; 20. Limiting pad; 21. Positioning hole; 22. Limiting plate; 23. Limiting rod; 24. Limiting hole; 25. 26. Limiting seat; 27. Limiting groove; 28. Positioning groove; 29. ​​Fixing screw; 30. Fixing hole; 31. Connecting hole; 32. Connecting seat; 33. Adsorption port; 34. Connecting port; 35. Applying shaft; 36. Adsorption hole; 37. Rotating groove; 38. Rotating ball; 39. Offset column; 40. Buffer spring; 41. Buffer rod; 42. Return spring; 43. Connecting plate; 44. Limiting protrusion; 45. Offset groove; 46. Guide plate; 47. Blocking plate. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] Example 1

[0025] like Figures 1 to 15 As shown, a high-precision non-destructive testing device for pressure vessel welds includes: a probe 18, an offset column 39, and a support plate 10. A guide plate 46 is fixedly connected to the side of the probe 18, and a connecting plate 43 is fixedly connected to the top of the probe 18. The guide plate 46 is arc-shaped at the end away from the probe 18. Wedge-shaped blocking plates 47 are fixedly connected to both ends of the guide plate 46. A buffer rod 41 is hinged to the top of the connecting plate 43. The offset column 39 is sleeved and connected to the buffer rod 41. A buffer spring 40 is provided inside the offset column 39. A spherical rotating ball 38 is fixedly connected to the top of the offset column 39. The top of the offset column 39 is equipped with... The positioning post 19 has a rotating groove 37 inside and an offset groove 45 at its bottom that communicates with the inner cavity of the rotating groove 37. The bottom end of the positioning post 19 is fixedly connected to the connecting plate 43 by a return spring 42. The rotating ball 38 is embedded in the inner cavity of the rotating groove 37. The offset post 39 has two side walls that fit against the inner wall of the offset groove 45, and the other two side walls of the offset post 39 are arc-shaped and do not contact the inner wall of the offset groove 45. The top end of the support plate 10 is fixedly connected to a positioning platform 13. The side end of the support plate 10 is mounted on the drive mechanism by a support mechanism. The positioning platform 13 fixes the positioning post 19 by a lifting mechanism.

[0026] The pressure vessel is placed horizontally, the drive mechanism is placed on one side of the pressure vessel, and the probe 18 is placed on the annular weld. The drive mechanism drives the support mechanism to rotate around the pressure vessel. The support mechanism rotates the support plate 10, and the support plate 10 moves the positioning column 19. The positioning column 19 moves the rotating ball 38 and the offset column 39, which in turn moves the buffer rod 41. The buffer rod 41 moves the probe 18 along the annular weld through the connecting plate 43. At the same time, the positioning column 19 moves the connecting plate 43 through the return spring 42.

[0027] Pressure vessels are generally curved structures with annular welds located on them. When the probe 18 slides along the annular weld, the connecting plate 43 and the buffer rod 41 are hinged together. Therefore, when the curvature of the pressure vessel increases, the displacement of the probe 18 is greater than that of the support mechanism. At this time, there is a difference in the displacement between the two. The probe 18 rotates adaptively at the bottom of the buffer rod 41 through the connecting plate 43 to prevent the probe 18 from getting stuck on the annular weld. At the same time, as the displacement of the probe 18 increases, the support mechanism continues to move and cannot adjust the probe 18. Furthermore, there is a time lag in the transmission of the effect of the increased displacement of the probe 18 to the support mechanism, which causes the front end of the probe 18 to tilt in the direction of movement. This invention designs a positioning post 19, a rotating ball 38, and an offset post 39. When the displacement of the probe 18 increases, the probe 18 pulls the buffer rod 41 through the connecting plate 43. The buffer rod 41 abuts against the inner wall of the offset post 39, causing the offset post 39 to rotate and offset. The buffer rod 41 extends from the inner wall of the offset post 39, and the offset post 39 rotates along the inner wall of the offset groove 45 in the opposite direction to the movement of the probe 18. The offset post 39 drives the rotating ball 38 to rotate along the inner wall of the rotating groove 37. The rotating ball 38 abuts against the inner wall of the rotating groove 37 to provide a limiting effect for the offset post 39, thereby eliminating the displacement difference between the probe 18 and the support mechanism.

[0028] When the probe 18 slides out from the annular weld area with increased curvature, the displacement of the probe 18 and the support mechanism remains the same. Due to the bending phenomenon that occurs during the above process, the return spring 42 begins to reset. The support mechanism, along with the positioning column 19, maintains stable movement. The return spring 42 accelerates the movement of the connecting plate 43, which in turn accelerates the movement of the buffer rod 41. The buffer rod 41 abuts against the inner wall of the offset column 39, thereby driving the offset column 39 to reset. The buffer rod 41 slides along the inner wall of the offset column 39 to reset.

[0029] When the curvature of the circumferential weld decreases, the displacement of probe 18 is less than the displacement of the support mechanism. Probe 18 will tilt at the end of the moving direction. Therefore, the connecting plate 43 drives the buffer rod 41 to rotate. The buffer rod 41 begins to extend into the offset column 39. At the same time, the offset column 39 rotates in the direction of probe 18 movement, thereby eliminating the displacement difference between probe 18 and the support mechanism.

[0030] It should be noted that when the probe 18 moves on the annular weld with different curvatures, the buffer spring 40 is always in a compressed state. The offset column 39 is always supported by the positioning column 19 through the rotating ball 38 and the inner wall of the rotating groove 37. The elastic force provided by the buffer spring 40 is applied to the connecting plate 43 through the buffer rod 41 and then transmitted to the probe 18. The probe 18 can always fit in contact with the annular weld.

[0031] The circumferential weld is located on the curved structure of the pressure vessel. The circumferential weld is affected by the curvature of the pressure vessel and has its own uneven characteristics. Therefore, when the probe 18 slides along the circumferential weld, a coupling medium is applied to the circumferential weld in advance. However, when the probe 18 slides along the circumferential weld, it will still encounter the convex and concave areas of the circumferential weld. The concave areas can be filled with the coupling medium, but for the convex areas, when the probe 18 moves to the convex area, the front end of the probe 18 will still be directly lifted in the direction of movement.

[0032] Therefore, in this invention, a guide plate 46 is added. When the probe 18 slides along the annular weld, the connecting plate 43 is fixed at the top center of the probe 18. The probe 18 and the bottom wall of the guide plate 46 are on the same horizontal plane. The guide plate 46 extends the length of the probe 18. The bottom wall of the guide plate 46 pushes the coupling medium to move, thereby ensuring that the bottom wall of the probe 18 is always filled with the coupling medium. When the guide plate 46 slides along the annular weld, the guide plate 46 first contacts the protrusion. The side end of the guide plate 46 can slide along the protrusion. At this time, the probe 18 rotates with the connecting plate 43 to perform adaptive angle adjustment. The guide plate 46 pushes the coupling medium to move, thereby the guide plate 46 carries the coupling medium. The guide plate 46 forms an upward slope with the protrusion. When the guide plate 46 slides over the protrusion, the probe 18 begins to gradually slide over the protrusion. Because the coupling medium and the protrusion form an upward slope, the probe 18 is prevented from tilting directly when it slides over the protrusion, which would result in a lack of coupling medium between the probe 18 and the annular weld, thus affecting the detection accuracy of the probe 18. When the guide plate 46 slides over the protrusion and contacts the annular weld, the guide plate 46 forms a downward slope with the coupling medium and the protrusion. Thus, when the probe 18 slides over the protrusion, the probe 18 slides along the downward slope. When the probe 18 passes over the protrusion, the displacement of the probe 18 is greater than the displacement of the support mechanism. This displacement change can be eliminated by the above-mentioned technical solution.

[0033] For the recessed area of ​​the annular weld, the guide plate 46 first moves to the recessed area of ​​the annular weld. The guide plate 46 pushes the coupling medium to the recessed area of ​​the annular weld, and fills the recessed area of ​​the annular weld in advance with the coupling medium to avoid the lack of coupling medium in the recessed area of ​​the annular weld. When the probe 18 moves to the recessed area of ​​the annular weld, the lack of coupling medium between the probe 18 and the recessed area of ​​the annular weld affects the detection accuracy of the probe 18 on the annular weld.

[0034] For the protrusions in the circumferential weld, the guide plate 46 pushes the coupling medium to form a slope between the coupling medium and the protrusion to eliminate the influence. However, when the guide plate 46 pushes the coupling medium, the coupling medium will flow to both sides of the guide plate 46. If the amount of coupling medium pushed by the guide plate 46 is insufficient, the slope formed by the coupling medium and the protrusion will lack coupling medium, affecting the contact between the probe 18 and the coupling medium when passing through the slope. Therefore, the present invention fixes the blocking plates 47 at both ends of the guide plate 46. The blocking plates 47 slide along both sides of the circumferential weld. When the guide plate 46 slides with the blocking plates 47, the blocking plates 47 block and collect the coupling medium as it slides to both sides of the guide plate 46, thereby providing a margin for the guide plate 46 to push the coupling medium.

[0035] Furthermore, the positioning platform 13 and the support plate 10 are provided with a plurality of positioning grooves 27, which form a whole within the positioning platform 13 and the support plate 10. The top of the positioning platform 13 is provided with a limiting hole 24 communicating with the inner cavity of the positioning groove 27. A positioning post 19 is slidably connected to the inner wall of the positioning groove 27, and a limiting rod 23 is provided at the top of the positioning post 19. The limiting rod 23 is threadedly connected to the inner wall of the limiting hole 24. When the probe 18 moves to the top of the annular weld of the pressure vessel, the limiting rod 23 is controlled to rotate, and the limiting rod 23 carries the positioning post 19 to a high position. The positioning column 19 slides along the inner wall of the positioning groove 27. The positioning column 19, along with the rotating ball 38 and the offset column 39, adjusts its height. The offset column 39, along with the buffer rod 41, adjusts its height via the buffer spring 40. The buffer rod 41, along with the probe 18, moves to the surface of the annular weld seam via the connecting plate 43 to fit together, thereby achieving the fitting of multiple probes 18 with the annular weld seam. At this time, the limiting rod 23 stops rotating. The limiting rod 23, through its threaded connection with the limiting hole 24, serves to fix the positioning column 19.

[0036] The present invention can add a set of probes 18 on both sides of the probe 18. When the probe 18 fails to detect the circumferential weld, the added probes 18 can prevent the circumferential weld from being unable to continue to be detected, and the added probes 18 can be adaptively adjusted through the above-mentioned technical solution.

[0037] The top of the connecting plate 43 is fixedly connected to the bottom of the positioning column 19 via a reset spring 42. The offset column 39 designed in this invention performs secondary adjustment of the probe 18 by offsetting within the offset groove 45. However, the support mechanism moves continuously with the support plate 10. After the offset column 39 performs secondary adjustment of the probe 18 by offsetting, the function of the offset column 39 in adjusting the probe 18 by offsetting is still ineffective when the offset column 39 does not reset. Therefore, this invention adds a reset spring 42. When the offset column 39 needs to reset, the reset spring 42 is in a bent state and automatically resets. Since the positioning column 19 will never offset, the reset spring 42 drives the connecting plate 43 to reset, and the connecting plate 43 drives the buffer rod 41 to reset, thereby driving the offset column 39 to reset. The entire reset process is dynamically adjusted and does not affect the probe 18 from always being in contact with the circumferential weld.

[0038] When the probe 18 slides along the annular weld, the probe 18 is fixed by the connecting plate 43, but the probe 18 lacks a buffering effect. The return spring 42 can act on the connecting plate 43 to provide a buffering force for the probe 18, thus preventing the probe 18 from vibrating while sliding along the annular weld, which would otherwise cause the probe 18 to fail to fully fit with the annular weld.

[0039] In some specific embodiments, the positioning platform 13 has a plurality of positioning grooves 27 equidistantly spaced along its length, penetrating the support plate 10. A limiting hole 24 communicating with the inner cavity of the positioning groove 27 is provided on the top of the positioning platform 13. A positioning post 19 is slidably connected to the inner wall of the positioning groove 27. A limiting rod 23 is provided on the top of the positioning post 19, and the limiting rod 23 is threadedly connected to the inner wall of the limiting hole 24. A positioning cover 14 is installed on the top of the positioning platform 13. A limiting plate 22 is fixedly connected to the top of the limiting rod 23, and a limiting seat 25 is fixedly connected to the bottom of the limiting rod 23. A limiting groove 26 is formed on the top of the positioning post 19 along the axis of the limiting rod 23. The limiting seat 25 is embedded in the inner cavity of the limiting groove 26 and rotates with the inner wall of the limiting groove 26. The positioning cover 14 is fixedly connected to a limiting pad 20. The limiting pad 20 has several positioning holes 21 along its length. The limiting pad 20 is abutted against the top of the positioning platform 13. The limiting plate 22 has several limiting protrusions 44 with arc-shaped cross-sections fixedly connected at equal intervals along the axis. The limiting protrusions 44 are abutted against the inner wall of the positioning holes 21. When the positioning column 19 is height adjusted, the limiting plate 22 is controlled to rotate. The limiting plate 22 drives the limiting rod 23 to rotate. The limiting rod 23 drives the limiting seat 25 to rotate. When the limiting rod 23 moves in height, the limiting rod 23 abuts against the inner wall of the limiting groove 26 through the limiting seat 25, thereby driving the positioning column 19 to adjust its height.

[0040] When the positioning column 19 is adjusted, the positioning cover 14 is installed on the top of the positioning platform 13. The positioning cover 14, along with the limiting pad 20, abuts against the top of the positioning platform 13. During the installation of the limiting pad 20, the limiting plate 22 is inserted into the positioning hole 21 opened in the limiting pad 20. When the limiting pad 20 is installed, due to the plasticity of the limiting pad 20, the limiting plate 22 is squeezed against the inner wall of the positioning hole 21 through the limiting protrusion 44. The limiting pad 20 wraps around the limiting protrusion 44, thereby limiting the limiting plate 22 and preventing the limiting plate 22 from rotating due to vibration. At the same time, the limiting pad 20 can buffer the vibration of the limiting plate 22 and the limiting rod 23, thus playing a damping role.

[0041] Example 2

[0042] like Figure 7 , Figure 8 , Figure 13 and 14As shown, the support plate 10 has side plates 15 fixedly connected to both sides at the end away from the positioning table 13. A storage box 16 is rotatably connected between the two sets of side plates 15. The side plates 15 have connecting holes 30. The storage box 16 is rotatably connected to the inner wall of the connecting holes 30 through a connecting seat 31. The storage box 16 has an applicator roller 17 at the end away from the positioning table 13. The bottom of the storage box 16 has an adsorption port 32 communicating with the inner cavity of the storage box 16. The side end of the connecting seat 31 is rotatably connected to the side plate 15. The applicator roller 17 is located at the bottom of the storage box 16 and is rotatably connected to the bottom of the storage box 16 and fits against the adsorption port 32. The storage box 16 has a fixing hole 29 that penetrates the side plate 15. The axis of the fixing hole 29 coincides with the axis of the connecting seat 31. A fixing screw 28 is threadedly connected to the inner wall of the fixing hole 29. The probe 18 is located at... When the probe 18 moves along the annular weld, the coupling medium between the probe and the weld serves as a connection and lubrication. However, the coupling medium is usually applied to the annular weld in advance. The coupling medium located at the bottom and sides of the annular weld may shift. There is a time difference when the probe 18 moves to the sides and bottom of the annular weld. When the probe 18 moves to the sides and bottom of the annular weld, the coupling medium on the annular weld is missing. This causes the friction of the probe 18 sliding along the annular weld to increase, and the connection effect to decrease. In this invention, the probe 18 is automatically adjusted by the above-mentioned technical solution when sliding along the annular weld. However, the lack of coupling medium increases the difficulty of the probe 18 to automatically adjust. At the same time, it affects the integrity and accuracy of the probe 18's detection of the annular weld.

[0043] In this invention, the coupling medium is first applied to the part of the annular weld seam that the probe 18 just begins to contact. When the support plate 10 moves, the support plate 10 drives the side plate 15 to move, and the side plate 15 drives the storage box 16 to move. The storage box 16 drives the application roller 17 to roll along the annular weld seam. The inner cavity of the storage box 16 stores the coupling medium. The coupling medium in the inner cavity of the storage box 16 contacts the application roller 17 through the adsorption port 32. The application roller 17 adsorbs the coupling medium in the inner cavity of the storage box 16. Then, the application roller 17 applies the coupling medium to the annular weld seam by rolling. Meanwhile, the probe 18 moves in time to the annular weld seam where the coupling medium has just been applied for detection, avoiding the phenomenon that the coupling medium applied to the annular weld seam will shift before contacting the probe 18.

[0044] In some specific embodiments, an application roller 17 is fixedly connected to an application shaft 35 on its inner wall. Rotation holes are respectively opened on both sides of the bottom of the storage box 16. Both ends of the application shaft 35 are rotatably connected to the inner walls of the rotation holes. Several mating interfaces 34 are equidistantly opened at both ends of the application shaft 35 along its axis. Several adsorption holes 36 are opened in the center of the application shaft 35. The mating interfaces 34 and adsorption holes 36 are respectively connected to the inner cavity of the application shaft 35. Connection ports 33 are respectively opened on both sides of the bottom of the storage box 16. The upper and lower ends of the connection ports 33 are respectively connected to the inner cavity of the storage box 16 and the inner cavity of the rotation holes. The application roller 17 adsorbs the coupling medium inside the storage box 16 and then applies the coating to the annular weld seam. To avoid applying... During the coating process, the coating roller 17 may experience a lack of coupling medium. In this invention, when the coating roller 17 rolls, it drives the coating shaft 35 to rotate along the inner wall of the rotating hole. When the interface 34 and the connection port 33 of the coating shaft 35 are aligned, the coupling medium in the inner cavity of the storage box 16 enters the inner cavity of the coating shaft 35 through the connection port 33 and the interface 34, thereby filling the inner cavity of the coating shaft 35 with coupling medium. Then, the coupling medium contacts the coating roller 17 through the adsorption hole 36, thereby ensuring that the coating roller 17 is always saturated after adsorbing the coupling medium, and avoiding the phenomenon of insufficient coupling medium for coating the annular weld due to the lack of coupling medium in the coating roller 17.

[0045] The rotating hole can always seal the interface 34, preventing the coupling medium from leaking out of the interface 34. At the same time, the arrangement of the interface 34 can prevent the coupling medium in the inner cavity of the storage box 16 from continuously entering the inner cavity of the coating shaft 35 through the connection port 33, thereby preventing the coating roller 17 from excessively adsorbing the coupling medium.

[0046] For pressure vessels of different diameters, in order to ensure that the coating roller 17 always fits in close contact with the annular weld, the storage box 16 designed in this invention can rotate the connecting seat 31 along the connecting hole 30 to adjust the angle, thereby ensuring that the coating roller 17 fits in close contact with the annular weld. Then, the fixing screw 28 is rotated into the fixing hole 29, and the storage box 16 is fixed by the threaded connection between the fixing screw 28 and the inner wall of the fixing hole 29.

[0047] Example 3

[0048] like Figure 1 , Figure 2 and Figure 3As shown, the driving mechanism includes: a support ring 1, a support frame 3, and a driver 4. The side end of the support ring 1 is fixedly connected to the support frame 3, and the other end of the support ring 1 is installed and connected to the driver 4 through the guide rail 2. The side end of the driver 4 is fixedly connected to the support plate 10 through the support mechanism. The support mechanism includes: a support platform 5, an adjusting seat 8, and a support rod 9. The bottom end of the support platform 5 is fixedly connected to the top end of the driver 4. The support platform 5 has an adjusting groove 6 along the height direction. The adjusting seat 8 is embedded in the inner cavity of the adjusting groove 6 and is slidably connected to the inner wall of the adjusting groove 6. The two ends of the support rod 9 are fixedly connected to the adjusting seat 8 and the support plate 10, respectively. The inner cavity of the adjusting groove 6 has an adjusting rod 7. The adjusting seat 8 has an adjusting hole 12 along the axis of the adjusting rod 7. The adjusting rod 7 is threadedly connected to the inner wall of the adjusting hole 12. The bottom end of the adjusting rod 7 is rotatably connected to the support platform 5. For the annular weld of the pressure vessel, the pressure vessel is placed horizontally, and then the support ring 1 is placed on the side of the pressure vessel. At the same time, the support frame 3 is fixed to the ground with bolts. At this time, the support plate 10 is located at the top of the annular weld of the pressure vessel. Apply coupling medium to the annular weld of the pressure vessel in advance, then adjust the height of the support mechanism, and the support mechanism moves the support plate 10 in the height direction.

[0049] For pressure vessels of different diameters, the support mechanism can be height-adjusted. The control rod 7 rotates, and the adjustment rod 7 drives the adjustment seat 8 to move through the threaded connection with the inner wall of the adjustment hole 12. The adjustment seat 8 slides along the inner wall of the adjustment groove 6, and the adjustment seat 8 drives the support rod 9 to adjust the height. The support rod 9 drives the support plate 10 to adjust the height. When the probe 18 is located at the top of the annular weld, the adjustment rod 7 stops rotating, and the adjustment rod 7 fixes the adjustment seat 8 through the threaded connection with the inner wall of the adjustment hole 12.

[0050] Furthermore, a guide ruler 11 is fixedly connected to one end of the adjusting seat 8 protruding from the support platform 5. The guide ruler 11 is slidably connected to the surface of the support platform 5. In order to adjust the height of the support plate 10 more accurately, when the adjusting seat 8 moves, the adjusting seat 8 moves with the guide ruler 11. The surface of the support platform 5 is provided with a height gauge, and the guide ruler 11 points to the scale. The position of the adjusting seat 8 can be adjusted according to the diameter of the pressure vessel, so as to accurately control the adjusting rod 7 to move the adjusting seat 8.

[0051] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A high-precision non-destructive testing device for pressure vessel welds, characterized in that, include: The probe (18) has a guide plate (46) fixedly connected to its side end and a connecting plate (43) fixedly connected to its top end. The end of the guide plate (46) away from the probe (18) is arc-shaped. Both ends of the guide plate (46) are fixedly connected to wedge-shaped blocking plates (47). The top end of the connecting plate (43) is hinged with a buffer rod (41). An offset column (39) is sleeved and connected to a buffer rod (41). A buffer spring (40) is provided in the inner cavity of the offset column (39). A spherical rotating ball (38) is fixedly connected to the top of the offset column (39). A positioning column (19) is provided at the top of the offset column (39). A rotating groove (37) is opened inside the positioning column (19). An offset groove (45) communicating with the inner cavity of the rotating groove (37) is opened at the bottom of the positioning column (19). The bottom end of the positioning column (19) is fixedly connected to the connecting plate (43) through a reset spring (42). The rotating ball (38) is embedded in the inner cavity of the rotating groove (37). Two side walls of the offset column (39) are in contact with the inner wall of the offset groove (45). The other two side walls of the offset column (39) are arc-shaped and do not contact the inner wall of the offset groove (45). The support plate (10) has a positioning platform (13) fixedly connected to its top end. The side end of the support plate (10) is mounted on the drive mechanism through a support mechanism. The positioning platform (13) fixes the positioning column (19) through a lifting mechanism.

2. The high-precision non-destructive testing equipment for pressure vessel welds according to claim 1, characterized in that, The positioning platform (13) and the support plate (10) are provided with a plurality of positioning grooves (27). The positioning grooves (27) form an integral part in the positioning platform (13) and the support plate (10). The top of the positioning platform (13) is provided with a limiting hole (24) that communicates with the inner cavity of the positioning groove (27). The inner wall of the positioning groove (27) is slidably connected with a positioning column (19). The top of the positioning column (19) is provided with a limiting rod (23). The limiting rod (23) is threadedly connected to the inner wall of the limiting hole (24).

3. The high-precision non-destructive testing equipment for pressure vessel welds according to claim 2, characterized in that, The positioning platform (13) is equipped with a positioning cover (14) on top. The top end of the limiting rod (23) is fixedly connected to a limiting plate (22), and the bottom end of the limiting rod (23) is fixedly connected to a limiting seat (25). The top of the positioning column (19) is provided with a limiting groove (26) along the axis of the limiting rod (23). The limiting seat (25) is embedded in the inner cavity of the limiting groove (26) and is rotatably connected to the inner wall of the limiting groove (26).

4. The high-precision non-destructive testing equipment for pressure vessel welds according to claim 3, characterized in that, The positioning cover (14) is fixedly connected to the inner cavity of the positioning pad (20). The positioning pad (20) has several positioning holes (21) along its length. The positioning pad (20) is abutted against the top of the positioning platform (13). The positioning plate (22) has several positioning protrusions (44) with arc-shaped cross-sections fixedly connected at equal intervals along the axis. The positioning protrusions (44) are abutted against the inner wall of the positioning holes (21).

5. The high-precision non-destructive testing equipment for pressure vessel welds according to claim 1, characterized in that, The support plate (10) has side plates (15) fixedly connected to both sides at the end away from the positioning table (13). A storage box (16) is rotatably connected between the two sets of side plates (15). The side plates (15) have connecting holes (30). The storage box (16) is rotatably connected to the inner wall of the connecting hole (30) through a connecting seat (31). The storage box (16) has an applicator roller (17) at the end away from the positioning table (13). The bottom of the storage box (16) has an adsorption port (32) that communicates with the inner cavity of the storage box (16). The side end of the connecting seat (31) is rotatably connected to the side plate (15). The applicator roller (17) is located at the bottom of the storage box (16). The applicator roller (17) is rotatably connected to the bottom of the storage box (16) and fits against the adsorption port (32).

6. The high-precision non-destructive testing equipment for pressure vessel welds according to claim 5, characterized in that, The storage box (16) has a fixing hole (29) that passes through the side plate (15). The center line of the fixing hole (29) coincides with the center line of the connecting seat (31). The inner wall of the fixing hole (29) is threaded with a fixing screw (28).

7. The high-precision non-destructive testing equipment for pressure vessel welds according to claim 5, characterized in that, The inner wall of the applicator roller (17) is fixedly connected to the applicator shaft (35). Rotation holes are opened on both sides of the bottom of the storage box (16). The two ends of the applicator shaft (35) are rotatably connected to the inner wall of the rotation hole. Several interface ports (34) are opened at equal intervals along the axis at both ends of the applicator shaft (35). Several adsorption holes (36) are opened in the center of the applicator shaft (35). The interface ports (34) and adsorption holes (36) are connected to the inner cavity of the applicator shaft (35). Connection ports (33) are opened on both sides of the bottom of the storage box (16). The upper and lower ends of the connection ports (33) are connected to the inner cavity of the storage box (16) and the inner cavity of the rotation hole, respectively.

8. The high-precision non-destructive testing equipment for pressure vessel welds according to claim 1, characterized in that, The driving mechanism includes a support ring (1), a support frame (3), and a driver (4). The side end of the support ring (1) is fixedly connected to the support frame (3), and the other end of the support ring (1) is installed and connected to the driver (4) through a guide rail (2). The side end of the driver (4) is fixedly connected to the support plate (10) through the support mechanism. The support mechanism includes a support platform (5), an adjustment seat (8), and a support rod (9). The bottom end of the support platform (5) is fixedly connected to the top end of the driver (4). The support platform (5) has an adjustment groove (6) along the height direction. The adjustment seat (8) is embedded in the inner cavity of the adjustment groove (6). The adjustment seat (8) is slidably connected to the inner wall of the adjustment groove (6). The two ends of the support rod (9) are fixedly connected to the adjustment seat (8) and the support plate (10) respectively.

9. A high-precision non-destructive testing equipment for pressure vessel welds according to claim 8, characterized in that, The inner cavity of the adjustment groove (6) is provided with an adjustment rod (7), and the adjustment seat (8) is provided with an adjustment hole (12) along the axis of the adjustment rod (7). The adjustment rod (7) is threadedly connected to the inner wall of the adjustment hole (12), and the bottom end of the adjustment rod (7) is rotatably connected to the support platform (5).

10. A high-precision non-destructive testing equipment for pressure vessel welds according to claim 9, characterized in that, The adjusting seat (8) is fixedly connected to a guide ruler (11) at one end protruding from the support platform (5), and the guide ruler (11) is slidably connected to the surface of the support platform (5).

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