An ultrasonic probe adjustment mechanism for special steel testing

Abstract

The invention relates to the technical field of ultrasonic flaw detection, and proposes an ultrasonic probe adjustment mechanism for special steel detection, comprising a guide rod, a mechanical claw arranged at one end of the guide rod, an end of the guide rod away from the mechanical claw being rotatably connected with a handle, an outer sleeve of the guide rod being sleeved on the outer side, the handle being slidably arranged at one end of the outer cylinder and elastically connected to the outer cylinder through a spring, a plurality of stop components abutting against the end face of a steel pipe to be detected and a first supporting component abutting against the inner wall of the end of the steel pipe to be detected in cooperation with the stop components are annularly distributed on the outer cylinder; during the ultrasonic flaw detection process, the invention causes the rotating rod to abut against the end face of the steel pipe, so that each support plate is spread outward and abuts against the inner wall of the end of the steel pipe, thereby supporting and positioning the outer cylinder, and at the same time, the elastic contraction of the elastic ring causes each sphere to abut against the inner wall of the steel pipe, thereby supporting and positioning the guide rod, thereby solving the problem of lack of support of the ultrasonic probe in the steel pipe in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic flaw detection, and in particular to an ultrasonic probe adjustment mechanism for special steel detection. Background Art

[0002] Ultrasonic testing is a means of inspection that uses ultrasonic technology to inspect the surface and internal quality of the inspected component without damaging the workpiece or the working state of the raw materials. Ultrasonic flaw detectors are commonly used for ultrasonic inspection of steel structures. They are portable industrial non-destructive flaw detection instruments that can quickly, conveniently, non-destructively and accurately detect, locate, evaluate and diagnose various defects (cracks, looseness, pores, inclusions, etc.) inside the workpiece. They can be used in laboratories and on-site projects. When using an ultrasonic flaw detector to inspect the quality of special steel pipes, the ultrasonic probe of a handheld ultrasonic flaw detector is generally in contact with the surface of the object to be inspected, and the detected waveform and data are displayed in real time on the main display of the ultrasonic flaw detector and saved. However, when inspecting some high-altitude or deep positions on the inner surface of the steel pipe, it is difficult for the handheld ultrasonic probe to reach the part that needs to be inspected.

[0003] After searching, the announcement number CN114280151B discloses a telescopic ultrasonic flaw detection device, including an ultrasonic probe, a connecting wire, a telescopic gripping mechanism and an angle adjustment mechanism, wherein the angle adjustment mechanism is arranged at one end of the telescopic gripping mechanism, the ultrasonic probe is arranged on the angle adjustment mechanism, and the ultrasonic probe is used to connect to the detection equipment through the connecting wire. When the ultrasonic flaw detection device performs quality inspection on components at a higher position, the telescopic length of the probe can be adjusted by telescoping.

[0004] However, the above-mentioned ultrasonic flaw detection device still has the following problems: when performing ultrasonic flaw detection on steel pipes, the ultrasonic probe lacks support inside the steel pipe, so it needs to be lifted by human hands. As the flaw detection depth increases, the telescopic length of the telescopic gripping mechanism gradually increases, and the lifting force gradually increases, which in turn causes laborious problems and affects the flaw detection operation. In addition, in order to ensure that the ultrasonic probe maintains an appropriate detection distance with the inner wall of the steel pipe, manual control is also required, which increases the difficulty of flaw detection. Summary of the invention

[0005] The invention provides an ultrasonic probe adjustment mechanism for special steel detection, which solves the problem of lack of support of the ultrasonic probe in a steel pipe in the prior art.

[0006] The technical solution of the present invention is as follows: an ultrasonic probe adjustment mechanism for special steel detection, comprising a guide rod, a mechanical claw arranged at one end of the guide rod, the guide rod having an end away from the mechanical claw rotatably connected to a handle, an outer sleeve of the guide rod is provided on the outer side of the guide rod, the handle is slidably arranged at one end of the outer cylinder and elastically connected to the outer cylinder through a spring, a plurality of stop components that abut against the end face of a steel pipe to be tested and a first supporting component that abuts against the inner wall of the end of the steel pipe to be tested in cooperation with the stop components are annularly distributed on the outer cylinder, a spiral groove is provided on the surface of the guide rod, a guide column that is limitedly positioned in the spiral groove is fixed in the outer cylinder, and a second supporting component that abuts against the inner wall of the steel pipe to be tested when the guide rod penetrates into the steel pipe to be tested is annularly distributed on the guide rod.

[0007] Preferably, a pressure plate slidably disposed in the outer cylinder is fixed to one end of the handle, a guide block is fixed outside the pressure plate, and a guide groove slidably matched with the guide block is formed on the outer cylinder.

[0008] Preferably, one end of the spring is fixed on the pressure plate, and the other end of the spring is fixed on the inner wall of the outer cylinder.

[0009] Preferably, the first supporting component includes an inner cylinder, which is movably sleeved between the outer cylinder and the guide rod, and the outer periphery of the inner cylinder is annularly distributed with support plates arranged parallel to the inner cylinder, and the outer surface of the inner cylinder is fixed with a plurality of pairs of first hinge seats arranged corresponding to the support plates, and the inner surface of the support plate is fixed with a second hinge seat corresponding to the first hinge seat, and a connecting plate is hinged between the first hinge seat and the second hinge seat, and a through groove is provided on the connecting plate, and a first movable groove for limiting the movement of the connecting plate is provided on the outer cylinder, and a positioning shaft limitedly positioned in the through groove of the connecting plate is fixed in the first movable groove.

[0010] Preferably, an anti-slip pad is fixed to the outer surface of the support plate.

[0011] Preferably, the stop component includes a rotating rod, the bottom of which is provided with fan-shaped teeth rotatably connected to the first movable groove, the outer surface of the inner cylinder is fixed with a rack meshing with the fan-shaped teeth, the top of the rotating rod is provided with a bending portion, and one side of the rotating rod is provided with a supporting portion.

[0012] Preferably, the second supporting component includes a plurality of annularly distributed bent rods and an elastic ring for elastically contracting each bent rod, the guide rod is provided with a second movable groove for the movement of the bent rod, the bent rod is V-shaped, and the bent rod is rotatably arranged in the second movable groove through a rotating shaft, a ball sleeve is fixed at one end of the bent rod, a ball is movably embedded in the ball sleeve, a groove is provided on the other end surface of the bent rod, and the elastic ring is nested in the groove of each bent rod.

[0013] Preferably, a conical pressure head is provided at one end of the outer cylinder close to the second supporting component, and a slope is provided at one end of the bent rod close to the conical pressure head.

[0014] The beneficial effects of the present invention are:

[0015] The present invention pushes the handle, and the rotating rod is kept in a fixed posture due to the resistance between the supporting part and the surface of the outer cylinder, so the handle starts to compress the spring and pushes the guide rod to continue to extend into the steel pipe to be tested. Due to the relative sliding of the guide rod and the outer cylinder, the guide column in the outer cylinder cooperates with the thread of the spiral groove on the outer surface of the guide rod to rotate the guide rod, and then the mechanical claw can continuously adjust the detection position with the ultrasonic probe. Compared with the prior art, the present invention can realize automatic adjustment of the flaw detection position of the inner wall of the steel pipe, and realize multi-directional flaw detection.

[0016] In the ultrasonic flaw detection process of the present invention, due to the abutment between the rotating rod and the end face of the steel pipe, each support plate is pushed outward and abuts against the inner wall of the end of the steel pipe, thereby supporting and positioning the outer cylinder. At the same time, due to the elastic contraction of the elastic ring, each sphere is abutted against the inner wall of the steel pipe, thereby supporting and positioning the guide rod, thereby ensuring that the ultrasonic probe maintains a suitable detection distance with the inner wall of the steel pipe, thereby solving the problem of lack of support of the ultrasonic probe in the steel pipe in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of an ultrasonic probe adjustment mechanism for special steel detection proposed by the present invention;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of an ultrasonic probe adjustment mechanism for special steel detection proposed by the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the first supporting component proposed by the present invention;

[0021] Figure 4 This is a schematic diagram of the half-section structure of the outer cylinder proposed by the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the second supporting component proposed by the present invention;

[0023] Figure 6 A schematic diagram of the bent rod structure proposed by the present invention;

[0024] Figure 7 This is a schematic diagram of the handle structure proposed by the present invention;

[0025] Figure 8 A schematic diagram of the guide rod structure proposed by the present invention;

[0026] Fig. 9 This is a schematic diagram of the rotating rod structure proposed by the present invention;

[0027] In the figure: 1. outer cylinder; 11. guide groove; 12. first movable groove; 13. conical pressure head; 14. guide column; 2. handle; 21. pressure plate; 22. guide block; 3. guide rod; 31. second movable groove; 32. spiral groove; 4. mechanical claw; 5. stop member; 51. rotating rod; 52. sector tooth; 53. bending part; 54. supporting part; 6. first supporting member; 61. inner cylinder; 62. rack; 63. first hinge seat; 64. connecting piece; 65. second hinge seat; 66. support plate; 67. anti-skid pad; 68. positioning shaft; 7. second supporting member; 71. bent rod; 711. groove; 712. inclined surface; 72. elastic ring; 73. sphere; 74. rotating shaft; 75. ball sleeve; 8. spring. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1 and Figure 2 The present invention provides a technical solution: an ultrasonic probe adjustment mechanism for special steel detection, comprising a guide rod 3 and a mechanical claw 4 arranged at one end of the guide rod 3. The mechanical claw 4 adopts an electric mechanical clamp in the prior art, which will not be described in detail here. It can be used to clamp and fix the ultrasonic probe and can adjust the detection angle of the ultrasonic probe. The end of the guide rod 3 away from the mechanical claw 4 is rotatably connected with a handle 2, an outer sleeve of the guide rod 3 is sleeved with an outer cylinder 1, the handle 2 is slidably arranged at one end of the outer cylinder 1 and elastically connected to the outer cylinder 1 through a spring 8, a plurality of stop components 5 that abut against the end face of the steel pipe to be tested and a first supporting component 6 that abuts against the inner wall of the end of the steel pipe to be tested in cooperation with the stop component 5 are annularly distributed on the outer cylinder 1, a spiral groove 32 is provided on the surface of the guide rod 3, a guide column 14 that is limitedly located in the spiral groove 32 is fixed in the outer cylinder 1, and a second supporting component 7 that abuts against the inner wall of the steel pipe to be tested when the guide rod 3 penetrates into the steel pipe to be tested is annularly distributed on the guide rod 3.

[0030] See also Figure 1 and Figure 2 , Figure 7A pressure plate 21 slidably arranged in the outer cylinder 1 is fixed at one end of the handle 2, and a guide block 22 is fixed outside the pressure plate 21. A guide groove 11 slidably matched with the guide block 22 is opened on the outer cylinder 1. One end of the spring 8 is fixed on the pressure plate 21, and the other end of the spring 8 is fixed on the inner wall of the outer cylinder 1. When not affected by external force, the spring 8 maintains the maximum elongation in the outer cylinder 1. During detection, the stop component 5 contacts the end face of the steel pipe to be tested, so that the handle 2 begins to compress the spring 8.

[0031] See also Figure 1 and Figure 2 , Figure 3 The first supporting component 6 includes an inner cylinder 61, which is movably sleeved between the outer cylinder 1 and the guide rod 3. A support plate 66 arranged parallel to the inner cylinder 61 is distributed in an annular manner on the outer periphery of the inner cylinder 61. A plurality of pairs of first hinge seats 63 corresponding to the support plates 66 are fixed on the outer surface of the inner cylinder 61. A second hinge seat 65 corresponding to the first hinge seat 63 is fixed on the inner surface of the support plate 66. A connecting piece 64 is hinged between the first hinge seat 63 and the second hinge seat 65. A through groove is provided on the connecting piece 64. A first movable groove 12 for limiting the movable position of the connecting piece 64 is provided on the outer cylinder 1. A positioning shaft 68 limitedly positioned in the through groove of the connecting piece 64 is fixed in the first movable groove 12. An anti-slip pad 67 is fixed on the outer surface of the support plate 66 to increase the friction between the support plate 66 and the inner wall of the end of the steel pipe to be tested.

[0032] See also Figure 1 and Figure 2 , Fig. 9 The stop component 5 includes a rotating rod 51, a sector tooth 52 rotatably connected to the first movable groove 12 is provided at the bottom of the rotating rod 51, a rack 62 meshing with the sector tooth 52 is fixed to the outer surface of the inner cylinder 61, a bending portion 53 is provided at the top of the rotating rod 51, and a supporting portion 54 is provided on one side of the rotating rod 51. The handle 2 is pushed to make the bending portion 53 of the stop component 5 contact the end face of the steel pipe to be tested, and the sector tooth 52 at the bottom of the rotating rod 51 is engaged with the rack 62 on the surface of the inner cylinder 61, so that the inner cylinder 61 slides to the right in the outer cylinder 1, and then the positioning shaft 68 is limited by the through groove in the connecting piece 64, so that each support plate 66 is synchronously opened to the outside until it contacts the inner wall of the steel pipe.

[0033] See also Figure 5 and Figure 6The second supporting component 7 includes a plurality of annularly distributed bent rods 71 ​​and an elastic ring 72 for elastically contracting each bent rod 71. A second movable groove 31 for the movement of the bent rod 71 is opened on the guide rod 3. The bent rod 71 is V-shaped. The bent rod 71 is rotatably arranged in the second movable groove 31 through a rotating shaft 74. A ball sleeve 75 is fixed at one end of the bent rod 71. A ball body 73 is movably embedded in the ball sleeve 75. A groove 711 is provided on the other end surface of the bent rod 71. The elastic ring 72 is nested in the groove 711 of each bent rod 71. Push the handle 2. Since the rotating rod 51 is kept in a fixed posture due to the resistance of the supporting portion 54 and the surface of the outer cylinder 1, the handle 2 begins to compress the spring 8 and pushes the guide rod 3 to continue to extend into the steel pipe to be tested.

[0034] See also Figure 1 and Figure 2 , Figure 4 A conical pressure head 13 is provided at one end of the outer cylinder 1 close to the second supporting component 7, and a slope 712 is provided at one end of the bent rod 71 close to the conical pressure head 13. Due to the relative sliding of the guide rod 3 and the outer cylinder 1, the conical pressure head 13 no longer conflicts with the slope 712 of the bent rod 71. The bent rod 71 rotates around the rotating shaft 74 under the elastic contraction of the elastic ring 72, and one end of the ball sleeve 75 is stretched open until the ball 73 conflicts with the inner wall of the steel pipe.

[0035] The working principle and use process of the present invention are as follows: when testing a steel pipe made of special steel, first install the ultrasonic probe on the mechanical claw 4, hold the handle 2 and extend one end equipped with the ultrasonic probe into the steel pipe to be tested, push the handle 2 to make the bent portion 53 of the stop component 5 contact the end face of the steel pipe to be tested, and the inner cylinder 61 slides to the right in the outer cylinder 1 under the meshing of the fan-shaped teeth 52 at the bottom of the rotating rod 51 and the rack 62 on the surface of the inner cylinder 61, and then the positioning shaft 68 is limited by the through groove in the connecting piece 64, so that each support plate 66 is synchronously opened outward until it contacts the inner wall of the steel pipe, and the handle 2 is continued to be pushed. The handle 2 starts to compress the spring 8 and pushes the guide rod 3 to continue to extend into the steel pipe to be tested. Due to the relative sliding of the guide rod 3 and the outer cylinder 1, the conical pressure head 13 no longer conflicts with the inclined surface 712 of the bent rod 71. The bent rod 71 rotates around the rotating shaft 74 under the elastic contraction of the elastic ring 72, and one end of the ball sleeve 75 is stretched open until the ball 73 conflicts with the inner wall of the steel pipe. In the above process, the guide column 14 in the outer cylinder 1 cooperates with the thread of the spiral groove 32 on the outer surface of the guide rod 3 to rotate the guide rod 3, so that the mechanical claw 4 can continuously adjust the detection position with the ultrasonic probe, so as to realize the automatic adjustment of the flaw detection work at different positions of the inner wall of the steel pipe.

[0036] In the above-mentioned ultrasonic flaw detection process, since the rotating rod 51 is in conflict with the end face of the steel pipe, each support plate 66 is pushed outward and in conflict with the inner wall of the end of the steel pipe, supporting and positioning the outer cylinder 1. At the same time, the elastic contraction of the elastic ring 72 causes each sphere 73 to be in conflict with the inner wall of the steel pipe, supporting and positioning the guide rod 3, so as to ensure that the ultrasonic probe maintains an appropriate detection distance with the inner wall of the steel pipe.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultrasonic probe adjustment mechanism for special steel detection, comprising a guide rod (3) and a mechanical claw (4) arranged at one end of the guide rod (3), characterized in that: The end of the guide rod (3) away from the mechanical claw (4) is rotatably connected to a handle (2); an outer cylinder (1) is sleeved on the outer side of the guide rod (3); the handle (2) is slidably arranged on one end of the outer cylinder (1) and elastically connected to the outer cylinder (1) via a spring (8); a plurality of stop components (5) abutting against the end face of the steel pipe to be tested and a first supporting component (6) abutting against the inner wall of the end of the steel pipe to be tested in cooperation with the stop components (5) are annularly distributed on the outer cylinder (1); a spiral groove (32) is provided on the surface of the guide rod (3); a guide column (14) limitedly located in the spiral groove (32) is fixed in the outer cylinder (1); and a second supporting component (7) abutting against the inner wall of the steel pipe to be tested when the guide rod (3) penetrates into the steel pipe to be tested is annularly distributed on the guide rod (3); The first supporting component (6) comprises an inner cylinder (61), the inner cylinder (61) being movably sleeved between the outer cylinder (1) and the guide rod (3), a support plate (66) being arranged parallel to the inner cylinder (61) being distributed in an annular manner on the outer periphery of the inner cylinder (61), a plurality of pairs of first hinge seats (63) being arranged corresponding to the support plates (66) being fixed on the outer surface of the inner cylinder (61), a second hinge seat (65) corresponding to the first hinge seat (63) being fixed on the inner surface of the support plate (66), a connecting piece (64) being hingedly connected between the first hinge seat (63) and the second hinge seat (65), a through groove being provided on the connecting piece (64), a first movable groove (12) being provided on the outer cylinder (1) for limiting the movable position of the connecting piece (64), a positioning shaft (68) being limitedly positioned in the through groove of the connecting piece (64) being fixed in the first movable groove (12); The stop component (5) comprises a rotating rod (51), the bottom of the rotating rod (51) is provided with a sector tooth (52) rotatably connected to the first movable groove (12), the outer surface of the inner cylinder (61) is fixed with a rack (62) meshing with the sector tooth (52), the top of the rotating rod (51) is provided with a bending portion (53), and one side of the rotating rod (51) is provided with a supporting portion (54); The second supporting component (7) comprises a plurality of annularly distributed curved rods (71) and an elastic ring (72) for elastically contracting each curved rod (71); a second movable groove (31) for the movement of the curved rod (71) is provided on the guide rod (3); the curved rod (71) is V-shaped; the curved rod (71) is rotatably arranged in the second movable groove (31) via a rotating shaft (74); a ball sleeve (75) is fixed to one end of the curved rod (71); a ball (73) is movably embedded in the ball sleeve (75); a groove (711) is provided on the surface of the other end of the curved rod (71); and the elastic ring (72) is nested in the groove (711) of each curved rod (71); a conical pressure head (13) is provided at one end of the outer cylinder (1) close to the second supporting component (7); and a slope (712) is provided at one end of the curved rod (71) close to the conical pressure head (13).

2. The ultrasonic probe adjustment mechanism for special steel detection according to claim 1, characterized in that: A pressure plate (21) slidably disposed in the outer cylinder (1) is fixed to one end of the handle (2), a guide block (22) is fixed outside the pressure plate (21), and a guide groove (11) slidably engaged with the guide block (22) is provided on the outer cylinder (1).

3. The ultrasonic probe adjustment mechanism for special steel detection according to claim 2, characterized in that: One end of the spring (8) is fixed on the pressure plate (21), and the other end of the spring (8) is fixed on the inner wall of the outer cylinder (1).

4. The ultrasonic probe adjustment mechanism for special steel detection according to claim 1, characterized in that: An anti-slip pad (67) is fixed to the outer surface of the support plate (66).

Images