Tandem type scanning frame for ultrasonic detection of longitudinal weld joints of longitudinal welded pipes

Abstract

The utility model provides a tandem scanning frame for ultrasonic detection of a longitudinal welding seam of a longitudinal welded pipe, and belongs to the technical field of nondestructive detection. The utility model provides a tandem type scanning frame for ultrasonic detection of longitudinal welds of longitudinal welded pipes, which comprises a fixed support, a first ultrasonic probe, a second ultrasonic probe and a second probe fixing piece, a fixed long groove is arranged on the fixed support, the first ultrasonic probe is fixed in the fixed long groove, and the second ultrasonic probe is fixed in the second probe fixing piece. The second ultrasonic probe has the freedom degree of moving in the fixing long groove, and the second probe fixing piece locks the second ultrasonic probe. According to the tandem type scanning frame for ultrasonic detection of the longitudinal welding seam of the longitudinal welded pipe, the first ultrasonic probe and the second ultrasonic probe are arranged on the fixing support, the second ultrasonic probe is locked through the second probe fixing piece, the first ultrasonic probe and the second ultrasonic probe are stably fixed, and the distance between the first ultrasonic probe and the second ultrasonic probe is fixed; and synchronous movement can be realized, so that the detection accuracy is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of nondestructive testing, and particularly relates to an ultrasonic testing tandem scanner for longitudinal welds of straight-seam welded pipes. Background Technique

[0002] Steel pipes are widely used in fields such as oil and gas transportation, chemical raw material transportation, pulp transportation, water supply, road and bridge, and steel structure facilities. Different application fields have different requirements for the quality of steel pipes. In the oil and gas transportation field, if there are problems with the quality of the welds, it is easy to have quality disputes during the construction stage, affecting the operation of subsequent pipelines and posing potential safety hazards. Therefore, the quality control of steel pipe longitudinal welds is becoming increasingly strict. In order to improve the safety of steel pipe use, it is necessary to perform flaw detection operations on steel pipes. Flaw detection operations use radioactive substances, ultrasonic waves, etc. to check whether there are defects in the internal structures of metals and non-metals, such as internal cracks, cavities, etc. Ultrasonic testing flaw detection uses piezoelectric transducer devices to generate pulsed vibrations through instantaneous electrical excitation, and forms ultrasonic waves by transmitting them into metals through a sound coupling medium. When ultrasonic waves encounter defects during propagation, they will be reflected and return to the transducer, and then the sound pulse is converted into an electrical pulse. Measuring the amplitude and propagation time of this signal can evaluate the position and severity of defects in the workpiece. When performing ultrasonic testing flaw detection, automatic ultrasonic equipment is generally used to detect longitudinal defects (including longitudinal defects inside, outside, and in the middle area of steel pipe welds) and transverse defects. During the detection process, there are easily detection blind spots. For the detection of longitudinal and transverse defects in the inner and outer areas of the blind spots, manual single-crystal inclined probes are generally used for supplementary detection. For longitudinal defects in the middle area of steel pipe welds with a relatively large wall thickness (t≥12mm), a double-inclined probe tandem (one transmitting and one receiving) method is used for detection. However, during the tandem ultrasonic scanning detection process of one transmitting and one receiving, it is not easy to ensure a fixed distance between the two probes, and it is not easy to make the two probes move synchronously, resulting in deviations in the detection results. Content of the Utility Model

[0003] The purpose of the utility model is to provide an ultrasonic testing tandem scanner for longitudinal welds of straight-seam welded pipes, aiming to solve the problem that when detecting welds by the double-inclined probe tandem method, the two probes cannot move synchronously, affecting the accuracy of the detection results.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: providing an ultrasonic testing tandem scanner for longitudinal welds of straight-seam welded pipes, which includes a fixed bracket, a first ultrasonic probe, a second ultrasonic probe, and a second probe fixing member. A fixed long groove is provided on the fixed bracket. The first ultrasonic probe is fixed in the fixed long groove. The second ultrasonic probe has the freedom to move in the fixed long groove, and the second probe fixing member locks the second ultrasonic probe.

[0005] In a possible implementation, first locking long holes and second locking long holes are respectively arranged on the front and rear side walls of the fixed long groove opposite to each other. The first locking long holes and the second locking long holes are arranged along the length direction of the fixed bracket. The second probe fixing member penetrates through the first locking long holes and the second locking long holes to lock the second ultrasonic probe.

[0006] In a possible implementation, the second probe fixing member includes a baffle plate, a connecting pull rod and a locking nut. The baffle plate is arranged at the first end of the connecting pull rod. The baffle plate is slidably arranged in the first locking long hole. The connecting pull rod penetrates through the fixed long groove. The locking nut is arranged at the second end of the connecting pull rod and is located outside the fixed long groove. The baffle plate and the connecting pull rod abut against the side wall of the second ultrasonic probe.

[0007] In a possible implementation, a threaded column matching the locking nut is arranged at the second end of the connecting pull rod. The diameter of the threaded column is larger than the thickness of the connecting pull rod. A part of the side wall of the threaded column abuts against the side wall of the second ultrasonic probe.

[0008] In a possible implementation, a wear part is arranged below the fixed bracket. The lower end surface of the wear part is an arc matching the pipe fitting.

[0009] In a possible implementation, the wear part is detachably arranged on the fixed bracket.

[0010] In a possible implementation, a clamping strip is arranged at the lower end of the fixed bracket. A clamping groove is formed between the clamping strip and the fixed bracket. A limiting strip is arranged on the upper end surface of the wear part. The limiting strip matches the clamping groove.

[0011] In a possible implementation, the incident angles of the first ultrasonic probe and the second ultrasonic probe are the same.

[0012] In a possible implementation, a handle is arranged at the first end of the fixed bracket.

[0013] In a possible implementation, the first ultrasonic probe is locked in the fixed long groove by a first fixing bolt.

[0014] The beneficial effects of a tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes provided by the utility model are as follows:

[0015] Compared with the prior art, a fixed bracket, a first ultrasonic probe, a second ultrasonic probe and a second probe fixing member are provided. A fixed long groove is provided in the length direction of the fixed bracket. The first ultrasonic probe and the second ultrasonic probe are sequentially fixed in the fixed long groove. The second probe fixing member locks the second ultrasonic probe in the fixed long groove. The first ultrasonic probe and the second ultrasonic probe are stably fixed. In the fixed long groove, the distance between the first ultrasonic probe and the second ultrasonic probe is fixed and they can move synchronously, improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a schematic three-dimensional structure diagram of a tandem scanning frame for ultrasonic inspection of longitudinal welds of straight-seam welded pipes provided by an embodiment of the present invention Figure 1 ;

[0018] Figure 2 is a schematic three-dimensional structure diagram of a tandem scanning frame for ultrasonic inspection of longitudinal welds of straight-seam welded pipes provided by an embodiment of the present invention Figure 2 ;

[0019] Figure 3 is an exploded structure diagram of a tandem scanning frame for ultrasonic inspection of longitudinal welds of straight-seam welded pipes provided by an embodiment of the present invention.

[0020] In the figure: 1, fixed bracket; 2, fixed long groove; 3, first locking long hole; 4, second locking long hole; 5, clamping strip; 6, clamping groove; 7, handle; 8, first ultrasonic probe; 9, first fixing bolt; 10, second ultrasonic probe; 11, baffle; 12, connecting pull rod; 13, threaded column; 14, locking nut; 15, wear part; 16, limiting strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following further details the present invention with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] Please refer to Figures 1 to 3, a specific implementation manner of an ultrasonic testing tandem scanning frame for longitudinal welds of straight seam welded pipes provided by the present utility model will be described. It includes a fixed bracket 1, a first ultrasonic probe 8, a second ultrasonic probe 10, and a second probe fixing member. A fixed long groove 2 is provided on the fixed bracket 1. The first ultrasonic probe 8 is fixed in the fixed long groove 2. The second ultrasonic probe 10 has the freedom to move in the fixed long groove 2, and the second probe fixing member locks the second ultrasonic probe 10.

[0023] An ultrasonic testing tandem scanning frame for longitudinal welds of straight seam welded pipes provided by the present utility model, compared with the prior art, is provided with a fixed bracket 1, a first ultrasonic probe 8, a second ultrasonic probe 10, and a second probe fixing member. A fixed long groove 2 is provided in the length direction of the fixed bracket 1. The first ultrasonic probe 8 and the second ultrasonic probe 10 are sequentially fixed in the fixed long groove 2. The second probe fixing member locks the second ultrasonic probe 10 in the fixed long groove 2. The first ultrasonic probe 8 and the second ultrasonic probe 10 are stably fixed. In the fixed long groove 2, the distance between the first ultrasonic probe 8 and the second ultrasonic probe is fixed and they can move synchronously, improving the accuracy of detection.

[0024] Specifically, please refer to Figures 1 to 3 , the fixed bracket 1 is placed above the pipe fitting perpendicular to the length direction of the pipe fitting. The fixed long groove 2 is arranged along the length direction of the fixed bracket 1. The first ultrasonic probe 8 is fixed at the first end of the fixed long groove 2, that is, the left end of the fixed long groove 2. The second ultrasonic probe 10 is arranged on the right side of the first ultrasonic probe 8. The second ultrasonic probe 10 is movably arranged in the fixed long groove 2. After the second ultrasonic probe 10 moves to the specified position, the second probe fixing member locks the second ultrasonic probe 10 in the fixed long groove 2. The first ultrasonic probe 8 and the second ultrasonic probe 10 are stably fixed. In the fixed long groove 2, the distance between the first ultrasonic probe 8 and the second ultrasonic probe is fixed and they can move synchronously, improving the accuracy of detection.

[0025] As a specific implementation manner of an ultrasonic testing tandem scanning frame for longitudinal welds of straight seam welded pipes provided by the present utility model, please refer to Figures 1 to 3 , first locking long holes 3 and second locking long holes are respectively provided on the opposite front and rear side walls of the fixed long groove 2. The first locking long holes 3 and the second locking long holes are arranged along the length direction of the fixed bracket 1. The second probe fixing member passes through the first locking long holes 3 and the second locking long holes to lock the second ultrasonic probe 10.

[0026] Specifically, please refer to Figures 1 to 3, a first locking long hole 3 is provided on the front side wall of the fixed long groove 2, a second locking long hole 4 is provided on the rear side wall of the fixed long groove 2, the first locking long hole 3 and the second locking long hole 4 are arranged opposite to each other, and the second probe fixing member passes through the first locking long hole 3 and the second locking long hole 4 to lock the second ultrasonic probe 10 in the fixed long groove 2, increasing the stability of fixation.

[0027] As a specific embodiment of a tandem scanning frame for ultrasonic inspection of longitudinal welds of straight-seam welded pipes provided by the present utility model, please refer to Figures 1 to 3 , the second probe fixing member includes a baffle 11, a connecting pull rod 12 and a locking nut 14. The baffle 11 is arranged at the first end of the connecting pull rod 12. The baffle 11 is slidably arranged in the first locking long hole 3. The connecting pull rod 12 passes through the fixed long groove 2. The locking nut 14 is arranged at the second end of the connecting pull rod 12 and is located outside the fixed long groove 2. The baffle 11 and the connecting pull rod 12 abut against the side wall of the second ultrasonic probe 10.

[0028] Specifically, please refer to Figures 1 to 3 , the second probe fixing member includes a baffle 11, a connecting pull rod 12 and a locking nut 14. The baffle 11 is arranged at the front end of the connecting pull rod 12. The locking nut 14 is arranged at the rear end of the connecting pull rod 12. The right end of the baffle 11 faces the second ultrasonic probe 10. The rear end of the connecting pull rod 12 passes through the second locking long hole 4. The locking nut 14 is threadedly connected to the connecting pull rod 12. The locking nut 14 is located outside the fixed bracket 1. The baffle 11 abuts against the front side wall of the second ultrasonic probe 10. The connecting pull rod 12 abuts against the left side wall of the second ultrasonic probe 10. The locking nut 14 is tightened and abuts against the fixed bracket 1 to lock the second probe fixing member on the fixed bracket 1, increasing the stability of fixation.

[0029] As a specific embodiment of a tandem scanning frame for ultrasonic inspection of longitudinal welds of straight-seam welded pipes provided by the present utility model, please refer to Figures 1 to 3 , a threaded post 13 matching the locking nut 14 is provided at the second end of the connecting pull rod 12. The diameter of the threaded post 13 is greater than the thickness of the connecting pull rod 12. Part of the side wall of the threaded post 13 abuts against the side wall of the second ultrasonic probe 10.

[0030] Specifically, please refer to Figures 1 to 3 , a threaded post 13 is provided at the second end of the connecting pull rod 12. The threaded post 13 passes through the second locking long hole 4 and is threadedly connected to the locking nut 14. The diameter of the threaded post 13 is greater than the thickness of the connecting pull rod 12. The right part of the front end of the threaded post 13 abuts against the rear side wall of the second ultrasonic probe 10, increasing the stability of the fixation of the second ultrasonic probe 10.

[0031] As a specific embodiment of a tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes provided by the present utility model, please refer to Figures 1 to 3 A wear part 15 is arranged below the fixed bracket 1, and the lower end surface of the wear part 15 is an arc shape matching the pipe fitting.

[0032] Specifically, please refer to Figures 1 to 3 The wear part 15 is arranged below the fixed bracket 1, the lower end surface of the wear part 15 is an arc shape, the height of the lower end surface of the wear part 15 gradually decreases from left to right, and the shape of the lower end surface of the wear part 15 matches the outer side wall of the pipe fitting, increasing the stability of the device during use in the detection process and facilitating the sliding of the device along the length direction of the pipe fitting.

[0033] As a specific embodiment of a tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes provided by the present utility model, please refer to Figures 1 to 3 The wear part 15 is detachably arranged on the fixed bracket 1.

[0034] Specifically, please refer to Figures 1 to 3 The wear part 15 is detachably arranged on the fixed bracket 1, and the specification of the wear part 15 can be replaced according to actual needs, increasing the detection range of the device.

[0035] As a specific embodiment of a tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes provided by the present utility model, please refer to Figures 1 to 3 A clamping strip 5 is arranged at the lower end of the fixed bracket 1, a clamping groove 6 is formed between the clamping strip 5 and the fixed bracket 1, a limiting strip 16 is arranged on the upper end surface of the wear part 15, and the limiting strip 16 matches the clamping groove 6.

[0036] Specifically, please refer to Figures 1 to 3 Clamping strips 5 are arranged at the lower ends of the front and rear side walls of the fixed bracket 1, the clamping strips 5 are arranged along the length direction of the fixed bracket 1, the left and right ends of the clamping strips 5 are respectively fixed on the fixed bracket 1 through connecting strips, a clamping groove 6 is formed between the clamping strips 5 and the fixed bracket 1, limiting strips 16 are arranged at the upper ends of the front and rear side walls of the wear part 15, the limiting strips 16 match the clamping groove 6, and the limiting strips 16 are clamped in the clamping groove 6, detachably fixing the wear part 15 below the fixed bracket 1, facilitating the replacement of the specification of the wear part 15 and increasing the detection range of the device.

[0037] As a specific embodiment of a tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes provided by the present utility model, please refer to Figures 1 to 3 The incident angles of the first ultrasonic probe 8 and the second ultrasonic probe 10 are the same.

[0038] Specifically, please refer to Figures 1 to 3, the incident angles of the first ultrasonic probe 8 and the second ultrasonic probe 10 are the same, and the magnitudes of the incident angles of the first ultrasonic probe 8 and the second ultrasonic probe 10 can be selected according to the actual dimensions of the pipe fittings.

[0039] As a specific embodiment of the tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes provided by the present invention, please refer to Figures 1 to 3 , a handle 7 is provided at the first end of the fixed bracket 1.

[0040] Specifically, please refer to Figures 1 to 3 , the first end of the handle 7 is arranged at the first end of the fixed bracket 1, and the second end of the handle 7 extends towards the second end of the fixed bracket 1, which is convenient for holding the handle 7 and improving the inspection efficiency.

[0041] As a specific embodiment of the tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes provided by the present invention, please refer to Figures 1 to 3 , the first ultrasonic probe 8 is locked in the fixed long groove 2 by the first fixing bolt 9.

[0042] Specifically, please refer to Figures 1 to 3 , the first fixing bolt 9 penetrates through the front / rear side wall of the fixed long groove 2 to fix the first ultrasonic probe 8 on the fixed bracket 1.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ultrasonic testing tandem scanning frame for longitudinal welds of straight seam welded pipes, characterized in that, It includes a fixed bracket, a first ultrasonic probe, a second ultrasonic probe and a second probe fixing member. A fixed long groove is provided on the fixed bracket. The first ultrasonic probe is fixed in the fixed long groove. The second ultrasonic probe has the freedom to move in the fixed long groove, and the second probe fixing member locks the second ultrasonic probe.

2. The tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes according to claim 1, wherein First locking long holes and second locking long holes are respectively provided on the front and rear side walls opposite to each other of the fixed long groove. The first locking long hole and the second locking long hole are arranged along the length direction of the fixed bracket. The second probe fixing member penetrates through the first locking long hole and the second locking long hole to lock the second ultrasonic probe.

3. The tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes according to claim 2, characterized in that, The second probe fixing member includes a baffle plate, a connecting pull rod and a locking nut. The baffle plate is arranged at the first end of the connecting pull rod. The baffle plate is slidably arranged in the first locking long hole. The connecting pull rod penetrates through the fixed long groove. The locking nut is arranged at the second end of the connecting pull rod and is located outside the fixed long groove. The baffle plate and the connecting pull rod abut against the side wall of the second ultrasonic probe.

4. The tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes according to claim 3, characterized in that, A threaded column matching the locking nut is provided at the second end of the connecting pull rod. The diameter of the threaded column is larger than the thickness of the connecting pull rod. Part of the side wall of the threaded column abuts against the side wall of the second ultrasonic probe.

5. The tandem scanning frame for ultrasonic testing of longitudinal welds of straight seam welded pipes according to claim 1, characterized in that, A wear member is provided below the fixed bracket. The lower end surface of the wear member is an arc matching the pipe fitting.

6. The tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes according to claim 5, characterized in that, The wear member is detachably arranged on the fixed bracket.

7. The tandem scanning frame for ultrasonic inspection of longitudinal welds of straight-seam welded pipes according to claim 6, wherein A clamping strip is provided at the lower end of the fixed bracket. A clamping groove is formed between the clamping strip and the fixed bracket. A limiting strip is provided on the upper end surface of the wear member. The limiting strip matches the clamping groove.

8. The tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes according to claim 1, characterized in that, The incident angles of the first ultrasonic probe and the second ultrasonic probe are the same.

9. The tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes according to claim 1, characterized in that, A handle is provided at the first end of the fixed bracket.

10. The tandem scanning frame for ultrasonic inspection of longitudinal welds of straight seam welded pipes according to claim 1, characterized in that, The first ultrasonic probe is locked in the fixed long groove by a first fixing bolt.

Images