阅读说明：本技术 基于残余应力仪的大径管道焊缝检测装置及其检测方法 (Large-diameter pipeline welding line detection device based on residual stress gauge and detection method thereof ) 是由 宋子博 季昌国 徐海滨 王智春 余超 彭波 于 2021-05-31 设计创作，主要内容包括：本发明为一种基于残余应力仪的大径管道焊缝检测装置及其检测方法,该装置包括残余应力测试探头、电源单元和数据采集单元,还包括探头多维运动结构,探头多维运动结构包括探头轴向移动结构、探头升降结构和探头旋转结构,残余应力测试探头连接于探头旋转结构上,探头旋转结构铰接于探头升降结构上,探头升降结构能升降地连接于探头轴向移动结构上；探头多维运动结构支撑设置于检测支撑结构上,检测支撑结构能支撑于管道上且能通过绑带能拆卸地与管道连接。本发明通过检测支撑结构和探头多维运动结构实现残余应力测试探头的有效支撑,避免探头晃动,结构简单,操作简单,简化人工操作流程,提高检测效率。(The invention relates to a large-diameter pipeline weld joint detection device based on a residual stress gauge and a detection method thereof, wherein the device comprises a residual stress test probe, a power supply unit, a data acquisition unit and a probe multi-dimensional motion structure, the probe multi-dimensional motion structure comprises a probe axial moving structure, a probe lifting structure and a probe rotating structure, the residual stress test probe is connected to the probe rotating structure, the probe rotating structure is hinged to the probe lifting structure, and the probe lifting structure can be connected to the probe axial moving structure in a lifting manner; the multi-dimensional probe movement structure is supported and arranged on the detection support structure, and the detection support structure can be supported on the pipeline and can be detachably connected with the pipeline through a binding band. The invention realizes effective support of the residual stress test probe through the detection support structure and the multi-dimensional probe movement structure, avoids probe shaking, has simple structure and simple operation, simplifies manual operation flow and improves detection efficiency.)

1. A large-diameter pipeline welding seam detection device based on a residual stress gauge comprises a residual stress test probe, a power supply unit and a data acquisition unit, and is characterized by further comprising a probe multi-dimensional motion structure, wherein the probe multi-dimensional motion structure comprises a probe axial movement structure, a probe lifting structure and a probe rotation structure; the multi-dimensional probe movement structure is supported and arranged on a detection support structure, and the detection support structure can be supported on the pipeline and can be detachably connected with the pipeline through a binding band.

2. The weld joint detection device for the large-diameter pipeline based on the residual stress gauge as claimed in claim 1, wherein the probe lifting structure comprises a lifting screw, a central shaft of the lifting screw is arranged along the radial direction of the pipeline, and the lifting screw can be screwed in and lifted along the probe axial moving structure; probe revolution mechanic is including the first swivel mount that can wind the center pin of lifting screw, articulated second swivel mount on the first swivel mount, the second swivel mount can rotate around the second pivot, residual stress test probe fixed connection in the second swivel mount, the center pin of second pivot is the perpendicular setting in space with lifting screw's center pin.

3. The weld joint detection device for the large-diameter pipeline based on the residual stress gauge as claimed in claim 2, wherein the first rotating frame is hinged to the probe lifting structure through a first rotating shaft, a first scale display unit is arranged on a side wall of the first rotating shaft, and a first pointer unit is arranged on the probe lifting structure at a position corresponding to the first scale display unit; and a second scale display unit is arranged on the second rotating frame and positioned at the radial outer side of the second rotating shaft, and a second pointer unit is arranged at the position, corresponding to the second scale display unit, on the first rotating frame.

4. The weld joint detection device for the large-diameter pipeline based on the residual stress gauge as claimed in claim 2, wherein the probe axial moving structure comprises a moving base plate, an axial sliding guide hole is arranged on the moving base plate in a penetrating manner, the axial sliding guide hole can be slidably sleeved on the detection support structure, a lifting threaded sleeve is further arranged on the moving base plate, and the lifting screw rod penetrates through the lifting threaded sleeve and can be screwed along the lifting threaded sleeve; and one end of the axial sliding guide hole is provided with a fixed knob.

5. The weld joint detection device for the large-diameter pipeline based on the residual stress gauge as claimed in claim 4, wherein the probe lifting structure further comprises a lifting base plate, and one end of the lifting screw rod close to the probe rotating structure is hinged on the lifting base plate; the lifting base plate is also provided with a lifting guide rod parallel to the lifting screw rod, and the lifting guide rod can pass through the moving base plate in a sliding manner; a first pointer unit is arranged on the lifting substrate.

6. The weld joint detection device for the large-diameter pipeline based on the residual stress gauge as claimed in claim 5, wherein a lifting hand wheel is arranged at one end of the lifting screw rod, which is far away from the probe rotating structure.

7. The weld detection device for large-diameter pipelines based on the residual stress gauge as claimed in claim 3, wherein the first rotating shaft and the second rotating shaft are damping rotating shafts.

8. The weld joint detection device for the large-diameter pipeline based on the residual stress gauge as claimed in claim 2, wherein the detection support structure comprises 2 support frames which are arranged in parallel and at intervals along the axial direction of the pipeline, an axial slide rail is arranged between the 2 support frames, and the probe axial movement structure is slidably sleeved on the axial slide rail.

9. The weld joint detection device for the large-diameter pipeline based on the residual stress gauge as claimed in claim 8, wherein the bottom of the support frame is provided with an inward-concave arc surface, the arc surface can be abutted and buckled on the side wall of the pipeline, the bottom of the support frame is positioned at two ends of the arc surface and is provided with magnetic rollers, and the support frame is provided with handles; the pipeline binding device is characterized in that a binding belt fixing block is further arranged on the support frame, a binding belt is detachably connected to the binding belt fixing block, and the binding belt is used for binding the support frame to a pipeline.

10. A detection method using the residual stress gauge-based large-diameter pipeline weld detection device according to any one of claims 1 to 9, comprising:

step a1, assembling a probe multi-dimensional motion structure and a detection support structure;

b1, placing the detection support structure on the pipeline, positioning the probe multi-dimensional motion structure above the detected weld joint, and fixing the detection support structure by using a binding band;

step c1, assembling the residual stress test probe, the power supply unit and the data acquisition unit, and connecting the residual stress test probe to the multi-dimensional probe movement structure;

d1, adjusting the axial position, the radial position and the rotation angle of the residual stress test probe through the multi-dimensional probe motion structure;

and e1, starting the residual stress test probe to emit X rays to the set test point to start detection and measurement, and recording the detection data in real time by the data acquisition unit to obtain the residual stress distribution condition of the test point and the residual stress value of the test point.

Technical Field

The invention relates to the technical field of weld joint detection, in particular to a large-diameter pipeline weld joint detection device based on a residual stress gauge and a detection method thereof.

Background

Residual stress directly affects the fatigue strength, stress resistance, corrosion resistance, dimensional stability and service life of metal products, and is therefore generally regarded as important in industries, military and other sectors. The X-ray is one of the few nondestructive detection methods in the surface residual stress determination technology, determines the stress according to the change of the crystal plane spacing of the material or the product, is still one of the residual stress analysis and detection methods which are researched widely, deeply and mature so far, and is widely applied to various fields of scientific research and industrial production.

At present, a new generation of residual stress analyzer based on an all-two-dimensional detector analysis method has higher precision, does not need an angle meter, does not need a plurality of incidence angles to complete measurement, does not need a water cooler and an external power supply, greatly improves the measurement difficulty of complex-shaped part detection, narrow space detection, field engineering field detection, large-area part detection and the like, and has wider application. In a laboratory, a portable X-ray residual stress analyzer based on a full two-dimensional detector analysis method can be used for detecting stress problems such as fatigue of a welding part.

The existing portable X-ray residual stress analyzer has very strict requirements on the field test environment in the field actual production test process. When measuring the residual stress of the welding seam of the large-diameter pipeline at a higher position, a scaffold or a fixed platform needs to be built near the welding seam to be measured of the pipeline, then a tripod is placed on the platform to support a probe rocker arm and measure the probe, and meanwhile, the probe rocker arm also needs to be matched with a counterweight water bag to keep balance, so that the method has the following defects: 1) the scaffold or the fixed platform is complicated to set up, and if the pipeline needs to measure the residual stress of a plurality of welding seams which are far away from each other, the scaffold or the fixed platform needs to be set up, so that the workload is huge;

2) the stability of the scaffold or the fixed platform is greatly influenced by the vibration of the field working condition, and the measurement precision is seriously influenced by the swinging of the probe rocker arm; 3) when the overall residual stress distribution of the circumferential weld is measured, the traditional method is limited in measurement when the lower half part of the circumferential weld of the pipeline is measured, the residual stress distribution of the circumferential weld cannot be measured completely, and the accuracy of measuring the overall residual stress distribution of the circumferential weld is not high because each measuring point cannot be ensured to be on the same straight line; 4) because the welded seam materials of the detected pipeline are different, the probe of the residual stress analyzer needs to adjust different X-ray incident angles, and the traditional method needs to apply an electronic protractor to measure the angle of the sample and the probe for multiple times in the transverse direction and the longitudinal direction respectively. The method can not measure the pipeline welding seam in narrow space where the large-diameter pipeline is located, and the wide application of the residual stress analyzer in actual engineering is limited extremely.

Therefore, the inventor provides a large-diameter pipeline weld joint detection device based on a residual stress gauge and a detection method thereof by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.

Disclosure of Invention

The invention aims to provide a large-diameter pipeline weld joint detection device based on a residual stress gauge and a detection method thereof, which overcome the problems in the prior art.

The invention aims to realize the detection device of the large-diameter pipeline welding seam based on the residual stress meter, which comprises a residual stress test probe, a power supply unit, a data acquisition unit and a probe multi-dimensional motion structure, wherein the probe multi-dimensional motion structure comprises a probe axial moving structure, a probe lifting structure and a probe rotating structure; the multi-dimensional probe movement structure is supported and arranged on a detection support structure, and the detection support structure can be supported on the pipeline and can be detachably connected with the pipeline through a binding band.

In a preferred embodiment of the present invention, the probe lifting structure includes a lifting screw, a central shaft of the lifting screw is disposed along a radial direction of the pipeline, and the lifting screw can be screwed in and lifted along the probe axial movement structure; probe revolution mechanic is including the first swivel mount that can wind the center pin of lifting screw, articulated second swivel mount on the first swivel mount, the second swivel mount can rotate around the second pivot, residual stress test probe fixed connection in the second swivel mount, the center pin of second pivot is the perpendicular setting in space with lifting screw's center pin.

In a preferred embodiment of the present invention, the first rotating frame is hinged to the probe lifting structure through a first rotating shaft, a first scale display unit is disposed on a side wall of the first rotating shaft, and a first pointer unit is disposed at a position on the probe lifting structure corresponding to the first scale display unit; and a second scale display unit is arranged on the second rotating frame and positioned at the radial outer side of the second rotating shaft, and a second pointer unit is arranged at the position, corresponding to the second scale display unit, on the first rotating frame.

In a preferred embodiment of the present invention, the probe axial moving structure includes a moving substrate, an axial sliding guide hole is disposed on the moving substrate in a penetrating manner, the axial sliding guide hole can be slidably sleeved on the detection support structure, a lifting threaded sleeve is further disposed on the moving substrate, and the lifting screw penetrates through the lifting threaded sleeve and can be screwed along the lifting threaded sleeve; and one end of the axial sliding guide hole is provided with a fixed knob.

In a preferred embodiment of the present invention, the probe lifting structure further includes a lifting base plate, and one end of the lifting screw close to the probe rotating structure is hinged to the lifting base plate; the lifting base plate is also provided with a lifting guide rod parallel to the lifting screw rod, and the lifting guide rod can pass through the moving base plate in a sliding manner; a first pointer unit is arranged on the lifting substrate.

In a preferred embodiment of the present invention, a lifting handwheel is disposed at one end of the lifting screw rod away from the probe rotating structure.

In a preferred embodiment of the present invention, the first rotating shaft and the second rotating shaft are damping rotating shafts.

In a preferred embodiment of the present invention, the detecting support structure includes 2 support frames spaced in parallel along an axial direction of the pipeline, an axial slide rail is disposed between the 2 support frames, and the probe axial moving structure is slidably sleeved on the axial slide rail.

In a preferred embodiment of the present invention, the bottom of the supporting frame is provided with an inward concave arc surface, the arc surface can be abutted against and fastened on the side wall of the pipeline, the bottom of the supporting frame is provided with magnetic rollers at two ends of the arc surface, and the supporting frame is provided with a handle; the pipeline binding device is characterized in that a binding belt fixing block is further arranged on the support frame, a binding belt is detachably connected to the binding belt fixing block, and the binding belt is used for binding the support frame to a pipeline.

The object of the invention can also be achieved by a detection method of the large-diameter pipeline weld joint detection device based on the residual stress gauge, which comprises the following steps:

step a1, assembling a probe multi-dimensional motion structure and a detection support structure;

b1, placing the detection support structure on the pipeline, positioning the probe multi-dimensional motion structure above the detected weld joint, and fixing the detection support structure by using a binding band;

step c1, assembling the residual stress test probe, the power supply unit and the data acquisition unit, and connecting the residual stress test probe to the multi-dimensional probe movement structure;

d1, adjusting the axial position, the radial position and the rotation angle of the residual stress test probe through the multi-dimensional probe motion structure;

and e1, starting the residual stress test probe to emit X rays to the set test point to start detection and measurement, and recording the detection data in real time by the data acquisition unit to obtain the residual stress distribution condition of the test point and the residual stress value of the test point.

From the above, the large-diameter pipeline weld joint detection device and the detection method thereof based on the residual stress gauge provided by the invention have the following beneficial effects:

according to the large-diameter pipeline weld joint detection device based on the residual stress gauge, the effective support of the residual stress test probe is realized through the detection support structure and the multi-dimensional probe motion structure, the probe is prevented from shaking, and the specific test angle between the X-ray emission surface and the detection surface of the probe in the detection is ensured to have no deflection and shaking; the multi-dimensional motion structure of the probe can realize the movement and rotation of the probe in multiple directions, and the incident angle and position of X-rays can be conveniently adjusted; the detection supporting structure is connected and fixed on the pipeline through the binding band, the length and the type of the binding band can be adjusted to meet the requirements of pipelines with various specifications and working conditions, and the detection supporting structure can be fixed on pipelines with any large-size pipe diameter and various severe working conditions; the large-diameter pipeline welding seam detection device based on the residual stress gauge is simple in structure and operation, simplifies manual operation processes, and improves detection efficiency; the probe can move along the circumferential direction of the welding line by adjusting the magnetic roller to realize multi-point measurement of the circumferential welding line;

the detection method can realize effective and comprehensive detection of the residual stress condition of the circumferential weld of the pipeline to be detected, improve the detection efficiency and enable the detection condition to be more three-dimensional and complete.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention.

Wherein:

FIG. 1: the invention is a schematic diagram of a large-diameter pipeline welding seam detection device based on a residual stress gauge.

FIG. 2: is a schematic diagram of the multi-dimensional motion structure and detection support structure of the probe of the invention.

FIG. 3: is a schematic diagram of the probe axial moving structure of the invention.

FIG. 4: is a schematic diagram of the probe lifting structure of the invention.

FIG. 5: is a schematic diagram of the probe rotating structure of the invention.

FIG. 6: the invention is a schematic diagram of the use state of the large-diameter pipeline welding seam detection device based on the residual stress gauge.

In the figure:

100. a large-diameter pipeline welding seam detection device based on a residual stress gauge;

1. a residual stress test probe;

2. a probe axial movement structure;

21. moving the substrate; 211. lifting guide holes; 22. an axial sliding guide hole; 23. lifting the threaded sleeve; 24. fixing the rotary handle;

3. a probe lifting structure;

31. a lifting screw; 32. lifting the substrate; 321. a first pointer unit; 33. a lifting guide rod; 34. a lifting hand wheel;

4. a probe rotating structure;

41. a first rotating frame; 411. a second pointer unit; 42. a second rotating frame; 421. a second scale display unit; 43. a first rotating shaft; 431. a first scale display unit; 44. a second rotating shaft;

5. detecting the support structure;

51. a support frame; 52. an axial slide rail; 53. a handle; 54. a bandage fixing block; 55. a connecting screw; 56. a magnetic roller;

6. binding bands;

7. a pipeline.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.

The specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 6, the invention provides a residual stress gauge-based large-diameter pipeline weld joint detection device 100, which comprises a residual stress test probe 1 (an X-ray residual stress test probe), a power supply unit, a data acquisition unit and a probe multi-dimensional motion structure, wherein the probe multi-dimensional motion structure comprises a probe axial movement structure 2, a probe lifting structure 3 and a probe rotation structure 4, the residual stress test probe 1 is connected to the probe rotation structure 4, the probe rotation structure 4 is hinged to the probe lifting structure 3, and the probe lifting structure 3 can be connected to the probe axial movement structure 2 in a lifting manner; the multi-dimensional probe movement structure is supported on the detection support structure 5, and the detection support structure 5 can be supported on a pipeline 7 (a pipeline to be detected) and can be detachably connected with the pipeline 7 through a binding band.

The detection support structure 5 is fixed on the pipeline by a high-temperature or normal-temperature binding band, and the pipeline is possibly provided with a high-temperature binding band made of steel to deal with various limit working conditions besides a conventional nylon binding band because of the high-temperature working condition.

According to the large-diameter pipeline weld joint detection device based on the residual stress gauge, the effective support of the residual stress test probe is realized through the detection support structure and the multi-dimensional probe motion structure, the probe is prevented from shaking, and the specific test angle between the X-ray emission surface and the detection surface of the probe in the detection is ensured to have no deflection and shaking; the multi-dimensional motion structure of the probe can realize the movement and rotation of the probe in multiple directions, and the incident angle and position of X-rays can be conveniently adjusted; the detection support structure is connected and fixed on the pipeline through the binding band, the length and the type of the binding band can be adjusted to meet the requirements of pipelines with various specifications and working conditions, and the detection support structure can be fixed on the pipelines with any large-size pipe diameter and various severe working conditions; the large-diameter pipeline welding seam detection device based on the residual stress gauge is simple in structure and operation, simplifies manual operation process, and improves detection efficiency.

Further, as shown in fig. 2, 4 and 5, the probe lifting structure 3 includes a lifting screw 31, a central axis of the lifting screw 31 is arranged along a radial direction of the pipeline, and the lifting screw 31 can move the structure 2 along the axial direction of the probe to be screwed in for lifting; the probe rotating structure 4 comprises a first rotating frame 41 capable of rotating around the central axis of the lifting screw 31, a second rotating frame 42 is hinged on the first rotating frame 41, the second rotating frame 42 can rotate around a second rotating shaft 44, the residual stress test probe is fixedly connected in the second rotating frame 42 (the residual stress test probe is installed on the second rotating frame 42 through a probe installation hole), and the central axis of the second rotating shaft 44 and the central axis of the lifting screw 31 are vertically arranged in a space. The first rotating frame 41 and the second rotating frame 42 are both arranged in a C shape, and the second rotating frame 42 is sleeved in the first rotating frame 41.

Further, as shown in fig. 2, 4 and 5, the first rotating frame 41 is hinged to the probe lifting structure 3 through a first rotating shaft 43, a first scale display unit 431 is disposed on a side wall of the first rotating shaft 43, and a first pointer unit is disposed at a position on the probe lifting structure 3 corresponding to the first scale display unit 431; a second scale display unit 421 is disposed on the second rotating frame 42 at the radial outer side of the second rotating shaft 44, and a second pointer unit 411 is disposed on the first rotating frame 41 at a position corresponding to the second scale display unit 421.

In the present embodiment, the first rotating shaft 43 and the second rotating shaft 44 are both damping rotating shafts.

The side wall of the first rotating shaft 43 is provided with a first scale display unit 431, a first pointer unit is arranged at a position on the probe lifting structure 3 corresponding to the first scale display unit 431, and when the first rotating frame 41 is rotated, the rotating angle of the first rotating frame can be determined according to the scale value of the first scale display unit 431.

A second scale display unit 421 is disposed on the second rotating frame 42 at the radial outer side of the second rotating shaft 44, and a second pointer unit 411 is disposed on the first rotating frame 41 at a position corresponding to the second scale display unit 421. When the second rotating frame 42 is rotated, the rotation angle thereof can be determined according to the scale value of the second scale display unit 421, and the angle is consistent with the incident angle of the probe X-ray.

Further, as shown in fig. 1, 2, and 3, the probe axial moving structure 2 includes a moving base plate 21, an axial sliding guide hole 22 is penetratingly disposed on the moving base plate 21, the axial sliding guide hole 22 can be slidably sleeved on the detection support structure 5, a lifting threaded sleeve 23 is further disposed on the moving base plate 21, a lifting screw 31 is penetratingly disposed through the lifting threaded sleeve 23 and can be screwed along the lifting threaded sleeve 23, and the lifting screw 31 is in threaded engagement with the lifting threaded sleeve 23; one end of the axial sliding guide hole 22 is provided with a fixed knob 24, and the fixed knob 24 is used for axially fixing the probe axial moving structure 2 on the detection supporting structure 5.

In the detection process, when the probe needs to move along the axial direction (the axial direction of the pipeline), the fixed knob 24 is loosened, the probe axial moving structure 2 is moved to enable the probe to reach any axial position, the fixed knob 24 is screwed, and the probe axial moving structure 2 is fixed at the axial pointing position.

Further, as shown in fig. 2 and 4, the probe lifting structure 3 further includes a lifting base plate 32, and one end of the lifting screw 31 close to the probe rotating structure 4 is hinged on the lifting base plate 32; the lifting base plate 32 is also provided with a lifting guide rod 33 parallel to the lifting screw 31, and the lifting guide rod 33 can pass through the moving base plate 21 in a sliding manner; the first pointer unit 321 is provided on the elevating base plate 32. A rotating bearing is arranged on the lifting base plate 32, and one end of the lifting screw 31 close to the probe rotating structure 4 is hinged to the rotating bearing; the number of the lifting guide rods 33 is 2, the lifting guide rods 33 are respectively positioned at two sides of the lifting screw rod 31, the through lifting guide holes 211 are formed in the movable base plate 21, the lifting guide rods 33 penetrate through the lifting guide holes 211 in a sliding mode, and the lifting guide rods 33 ensure that the probe lifting structure 3 is lifted stably and deflection is avoided.

Further, as shown in fig. 4, a lifting handwheel 34 is arranged at one end of the lifting screw 31 far away from the probe rotating structure. During detection, the whole probe lifting structure 3 can be lifted and adjusted by rotating the lifting hand wheel 34.

Further, as shown in fig. 1 and fig. 2, the detection supporting structure 5 includes 2 supporting frames 51 arranged along the axial direction of the pipeline at intervals, an axial sliding rail 52 is arranged between the 2 supporting frames 51, the probe axial moving structure 2 is slidably sleeved on the axial sliding rail 52, the number of the axial sliding rails 52 is 2, and the probe axial moving structure 2 is erected between the 2 axial sliding rails 52. The supporting frame 51 is made of aluminum alloy section bars, the axial sliding rails 52 are connected with the supporting frame 51 through connecting screws 55, and the probe multi-dimensional movement structure (the probe axial movement structure 2, the probe lifting structure 3 and the probe rotating structure 4) is arranged among the 2 axial sliding rails 52 to form a main frame shaped like a Chinese character ri; the detection supporting structure 5 is arranged on the pipeline in a spanning mode and positioned on two sides of a detected welding seam.

Further, as shown in fig. 1 and 6, the bottom of the supporting frame 51 is provided with a concave arc surface, the arc surface can be abutted against and buckled on the side wall of the pipeline, the bottom of the supporting frame 51 is provided with magnetic rollers 56 at two ends of the arc surface, and the supporting frame 51 is provided with a handle 53; the support frame 51 is further provided with a binding belt fixing block 54, the binding belt fixing block 54 is detachably connected with the binding belt 6, and the binding belt 6 is used for binding the support frame 51 on the pipeline 7. When the circumferential detection of the longitudinal welding seam is carried out, the whole longitudinal welding seam is detected by moving 2 handles 53 and 4 magnetic rollers 56 along the side wall of the longitudinal pipeline.

The invention also provides a detection method of the large-diameter pipeline weld joint detection device 100 based on the residual stress gauge, which comprises the following steps:

step a1, assembling the probe multi-dimensional motion structure and the detection support structure 5;

specifically, the handle 53 and the band fixing block 54 are connected to the support frames 51, the axial slide rail 52 passes through the axial slide guide hole 22 of the moving base plate 21, and 2 axial slide rails 52 are connected between 2 support frames 51;

b1, placing the detection supporting structure 5 on the pipeline, positioning the probe multi-dimensional motion structure above the detected welding line, and fixing the detection supporting structure 5 by using a binding belt 6; as shown in fig. 6;

specifically, the detection supporting structure 5 is erected at two sides of a detected welding seam, the detection supporting structure 5 is fixed by using a binding band 6, and if the detected pipeline is at a high temperature, the detection supporting structure can be fixed by using a high-temperature steel binding band;

step c1, assembling the residual stress test probe 1, a power supply unit and a data acquisition unit, and connecting the residual stress test probe 1 to the multi-dimensional probe movement structure;

specifically, the residual stress test probe 1, the power supply unit and the data acquisition unit are assembled through cables, and the residual stress test probe 1 is connected to the second rotating frame 42 of the probe rotating structure 4;

d1, adjusting the axial position, the radial position and the rotation angle of the residual stress test probe 1 through the multi-dimensional probe motion structure;

specifically, the detection support structure 5 is directly fixed on the pipeline, and the axial slide rail 52 is axially parallel to the pipeline, so that the plane of the residual stress test probe 1 (probe of an X-ray stress analyzer) perpendicular to the incident direction of X-rays is tangent to the measured point of the pipeline; according to the indication of the second scale display unit 421, the rotation angle of the probe is adjusted to the X-ray incident angle position specified by different materials, for example: the angle of incidence of the ferritic steel was chosen to be 35. Opening the mu-X360 test software, adjusting the probe axial moving structure 2 to a detection position along the axial slide rail 52 in a sliding way, and fixing the probe axial moving structure axially through the fixing knob 24; the lifting hand wheel 34 is rotated to enable the laser erythema to reach the green frame (the adjustment is carried out in the mu-X360 test software through the picture shown by the CCD camera), namely the adjustment of the probe position is finished.

Step e1, starting the residual stress test probe to emit X-rays to the set test point to start detection and measurement, and recording the detection data in real time by the data acquisition unit to obtain the residual stress distribution condition of the test point and the residual stress value of the test point;

f1, when detecting the circumferential weld, after completing the measurement of one point on the circumferential weld, because the material of the same circumferential weld is generally the same, it is not necessary to adjust various parameters such as the multidimensional movement structure of the probe; only the binding band needs to be loosened, the detection supporting structure is adjusted in the circumferential direction through the two handles and the four magnetic rollers to move along the longitudinal welding line, step e1 is executed after the detection supporting structure is fixed again, detection of each set test point of the circumferential welding line is completed in sequence, and the overall residual stress data of the circumferential welding line is obtained.

The detection method can realize effective and comprehensive detection of the residual stress condition of the circumferential weld of the pipeline to be detected, improve the detection efficiency and enable the detection condition to be more three-dimensional and complete.

From the above, the large-diameter pipeline weld joint detection device and the detection method thereof based on the residual stress gauge provided by the invention have the following beneficial effects:

according to the large-diameter pipeline weld joint detection device based on the residual stress gauge, the effective support of the residual stress test probe is realized through the detection support structure and the multi-dimensional probe motion structure, the probe is prevented from shaking, and the specific test angle between the X-ray emission surface and the detection surface of the probe in the detection is ensured to have no deflection and shaking; the multi-dimensional motion structure of the probe can realize the movement and rotation of the probe in multiple directions, and the incident angle and position of X-rays can be conveniently adjusted; the detection supporting structure is connected and fixed on the pipeline through the binding band, the length and the type of the binding band can be adjusted to meet the requirements of pipelines with various specifications and working conditions, and the detection supporting structure can be fixed on pipelines with any large-size pipe diameter and various severe working conditions; the large-diameter pipeline welding seam detection device based on the residual stress gauge is simple in structure and operation, simplifies manual operation processes, and improves detection efficiency; the probe can move along the circumferential direction of the welding line by adjusting the magnetic roller to realize multi-point measurement of the circumferential welding line;

the detection method can realize effective and comprehensive detection of the residual stress condition of the circumferential weld of the pipeline to be detected, improve the detection efficiency and enable the detection condition to be more three-dimensional and complete.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.