CN203414446U - TOFD (Time of flight diffraction) ultrasonic detection probe wedge for welded joint of straight pipe - Google Patents

Abstract

The utility model introduces a TOFD (Time of flight diffraction) ultrasonic detection probe wedge for a welded joint of a straight pipe. The TOFD ultrasonic detection probe wedge comprises a rectangular metal wedge bottom, a wedge upper part with a right-trapezoid-shaped cross section, four through inner bolt holes in the wedge upper part, two round holes in the front and back surfaces of the wedge, a probe round hole penetrating through the wedge bottom, and a bolt hole and a screw rod on the surface of the left side of the wedge. According to the utility model, two inner bolt holes are machined on each of the two sides of the original probe wedge in the width direction, so that the problem that a probe plane does not swing and in a stable state when scanning on a pipeline arc surface is solved; due to the four round holes in a rectangular inclined surface and corners of the upper surface of the wedge upper part, inner bolt studs can regulate the length, so that the effect of enabling the probe wedge not to swing in the walking direction during scanning is achieved.

Description

A kind of straight tube weld seam diffraction time difference method ultrasonic inspection probe voussoir

Technical field

The utility model relates to a kind of pipe welding seam detection technique, particularly a kind of straight tube weld seam diffraction time difference method ultrasonic inspection probe voussoir.

Background technology

At present in the installation of refinery device, large heavy wall, Large Diameter Pipeline pressure pipeline butt girth welding seam Non-Destructive Testing quantities are increasing; Adopt A type pulse ultrasonic wave to detect, Flaw display is not directly perceived, can not display defect shape, and testing result and defectoscopy are affected by human factors greatly, and defects detection is evaluated poor repeatability; Adopt X ray to detect more and more difficult even can not detect (penetration power is not enough); Adopt gamma-rays detect security protection tired can (some place do not allow use), detection time is long, detection time is limited, the half life period is short, thereby not only cost is high, sensitivity is low, detection efficiency is low, is seriously restricting the factors such as duration of a project, quality, safety.Expect to have a kind of novel detection method that can overcome above-mentioned detection shortcoming.

TOFD detection technique, Time of Flight Diffraction Technique, looks like for diffraction time difference method ultrasonic detecting technology.It is light, flexible that TOFD detection technique has equipment; Particularly applicable to large wall thickness pipeline weld seam detection; Testing result is directly perceived, reproducible, can show in real time; Scanning simultaneously can butt welded seam defect analysis, judge, also printable, deposit, realizes the permanent preservation of testing result; Detection sensitivity high (not being subject to the impact of defect waves panel height degree), defect location accurately (along fusion length direction, thickness direction), also can measure the oneself height of defect; Detection speed is fast, efficiency is high, the duration is short; Operation intensity is little, radiationless pollution-free; Can realize round-the-clock detection simultaneously.This detection technique can effectively solve the deficiency that other detection method exists.

TOFD detection technique is a kind of new detection technique based on diffracted signal examinations, and Chinese is diffraction time difference method ultrasonic detection technology.It is a kind of ultrasonic detection method that mainly utilizes the diffracted signal detection of defect end points and measure flaw size that TOFD detects, and conventionally uses longitudinal wave oblique probe, adopts pattern of receipts.In weld seam both sides, adopt that the identical longitudinal wave oblique probe of a pair of frequency is symmetrical to be placed, normally 45 °～70 ° of the scopes of incident angle, one as transmitting probe, and another is as receiving transducer.At workpiece zero defect position, after transmitting ultrasonic pulse, what first arrive receiving transducer is straight-through ripple, then bottom reflection echo.When defectiveness exists, between straight-through ripple and bottorm echo, receiving transducer also can receive diffracted wave and the reflection wave that fault location produces.Except above-mentioned ripple, also have rejected region and bottom surface because of the shear wave that waveform transformation produces, generally can be late and arrive receiving transducer in bottorm echo.At the end points up and down of defect, the diffracted wave of generation, its diffraction energy derives from defect end.This two bundles diffracted wave number occurs between straight-through ripple and bottorm echo.The signal of defect two-end-point will be distinguishable in time, and the mistiming of propagating according to diffracted wave signal can be judged the value of flaw height.

Scanning face blind area just refers in TOFD testing process and accounts for wide impact owing to being subject to lead directly to ripple, forms the depth range (being generally 0～6mm) of None-identified defect.This region need to take other attachment approach to supplement detection, in order to improve defect detection rate and detection efficiency, can adopt the pop one's head in method of together scanning of creeping wave probe and TOFD to detect, the TOFD collection of illustrative plates that formation can analyzing evaluation and climb ripple collection of illustrative plates.

A sweep is the signal display format that the relation in the amplitude of ultrasonic signal and travel-time is shown with the form of rectangular coordinate, and horizontal ordinate represents the travel-time of sound wave, ordinate represent signal magnitude.It is the most basic a kind of single display mode.

A series of A sweep data combinations, by signal, process conversion and can obtain TOFD image.The wave amplitude that A sweeps signal shows with gray scale light and shade in image, shows the size of amplitude by gray shade scale.TOFD mono-dimension coordinate representative probe displacement, another ties up the representation signal delivery time; Identification and the analysis of the more favourable defect of TOFD image; Demonstrate length, depth of burial and the oneself height of defect.By to the analysis of image and judgement, draw the quality condition of the weld seam of detected workpiece.

Climbing ripple is a kind of wave of compression of propagating under the surface of material, owing to climbing ripple, be subject to the coarse impact of surface of the work little, have the highstrung advantage of effects on surface and near surface flaw, making to climb ripple detection becomes strong the supplementing that conventional TOFD detects simultaneously, and the detection degree of depth is 2～12mm.Climb ripple and be compressional wave when first medium incides second medium with near angle first critical angle, in second medium, produce a kind of inhomogeneous wave, most of energy while propagating due to this ripple mainly concentrates on surface and descends within the scope of certain, thereby has higher detection sensitive to the defect on nearly surface.And insensitive to surface of the work situation, be applicable to shaggy workpiece.Climb ripple while walking along fusion length direction, gather xsect defect in weld seam, show along the weld seam planimetric position, defect place of defect length and weld width direction longitudinally.Creeping wave probe is applicable to the surface of detected weld and near surface flaw to detect, and has made up the deficiency that causes blind area in TOFD probe scanning process.

At present, in the fixed safe technology of pressure vessel Supervision Code of the < < TSG R0004-2009 > > standard of China, clearly can use TOFD detection technique, while < < bearing device Non-Destructive Testing the 10th part: the issue of diffraction time difference method Ultrasonic Detection NB/T47013.10-2010 > > is implemented, but mention in < < pressure pipeline safety and technical supervision rules-industrial pipeline > > (TSG D0001-2009) and < < Industrial Metal pipework job specifications > > (GB50235-2010), can not use TOFD to detect, the application aspect of refinery posted sides pipeline is still blank at home at present for TOFD detection technique, and other industry is also without ripe experience.

TOFD detection system is mainly comprised of hardware system and software systems two large divisions.Hardware system: comprise that TOFD detected electrons instrument (main frame), TOFD detect scanner, TOFD detection ultrasonic probe and voussoir, the test block of TOFD testing calibration; TOFD detects scanning equipment and comprises: bracing frame, probe bracket, probe positions scrambler, magnet-wheel, probe and voussoir, drive motor (automatically) etc.

Scanner is the key device of TOFD detection technique, structure and the shape of defect detection and scanner have substantial connection, existing scanning equipment is only suitable for container butt-weld and detects, and this scanner has the following aspects to be not suitable for the Sizing In Butt Welded Pipes detection that curvature is larger.One, the horizontal magnet-wheel spacing of scanner is larger, is not suitable for the adjustment of curvature on a large scale; Its two, probe bracket upper and lower displacement is less, is not suitable for elbow, concentric reducer butt-weld scanning; Its three, probe voussoir is not suitable for more greatly elbow welded junction and detects; Its four, climbing probe can not be installed, to scanning face blind area, can not implement a scanning.

Therefore in order to improve detection technique ability, effectively solve the detection bottleneck in construction, must in the application of high pressure posted sides pipeline, study TOFD detection technique, grasp as early as possible high pressure posted sides pipeline TOFD detection technique, promote this technology and in industry apply.Particularly need development to be applicable to the scanning equipment that pipeline girth weld TOFD detects, meet manually and the needs that automatically detect.

At present, the welding line detector of prior art, for example, and the portable TOFD binary channels of the HS810 of Wuhan Branch Innovative Technology Co., Ltd supersonic reflectoscope, probe is fixed on probe bracket, and voussoir is fixed on the front portion of probe.And the pipeline detecting is as required different, need different detecting devicess.

Through research, applicant has developed modified diffraction time difference method ultrasonic detection equipment, wherein, for different straight tube weld seam and corner beads, needs different probe voussoirs, steady non-oscillatory technical requirement while reaching scanning.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of straight tube weld seam diffraction time difference method ultrasonic inspection probe voussoir, steady non-oscillatory technical requirement while reaching scanning.

In order to realize the object solving the problems of the technologies described above, the utility model has adopted following technical scheme:

A kind of straight tube weld seam diffraction time difference method ultrasonic inspection probe voussoir of the present utility model, is comprised of following part:

A, voussoir bottom: be a rectangle metallic object, the length of voussoir bottom and width are than being 1:(0.7 ~ 1.3), be highly 30% ~ 70% of width;

B, voussoir top: be the metallic object that xsect is right-angled trapezium, the top margin length of right-angled trapezium is 30% ~ 50% of base length; The base length of right-angled trapezium is the length of voussoir bottom; The upper surface of the lower surface on voussoir top and voussoir bottom overlaps mutually, the upper surface on voussoir top is the rectangle that the top margin of right-angled trapezium forms, the front and rear surfaces on voussoir top is identical right-angled trapezium face, the left surface on voussoir top is the rectangle dip plane that the hypotenuse of right-angled trapezium forms, and the rectangle that the straight flange that the right surface on voussoir top is right-angled trapezium forms is faced directly; Voussoir top and voussoir bottom are structure as a whole;

C, the upper right corner on right surface that is positioned at voussoir top and two inner bolt holes in bight, the lower right corner, inner bolt hole is provided with internal thread, and inner bolt hole vertically penetrates into the lower surface of voussoir bottom;

D, the upper left corner of upper surface that is positioned at voussoir top and two inner bolt holes in the lower left corner, inner bolt hole is provided with internal thread, and inner bolt hole vertically penetrates into the lower surface of voussoir bottom;

E, be positioned at each corresponding non-penetrating cylindrical hole of voussoir front and rear surfaces, these two cylindrical holes are with probe bracket and are connected and fixed hole; Inner without screw thread setting; This voussoir front and rear surfaces refers to by the front surface of voussoir bottom, the front surface voussoir front surface dimerous on voussoir top, and by the rear surface of voussoir bottom, the voussoir dimerous rear surface, rear surface on voussoir top;

F, be positioned at an adjusting bolt hole of voussoir left-hand face, adjusting bolt has threaded rod in hole, by regulating the position of threaded rod, can regulate or revise the copper sheathing angle in probe voussoir;

A probe circular hole on the rectangle dip plane on G, the upper surface that is positioned at voussoir top and voussoir top; Probe circular hole penetrates into the lower surface of voussoir bottom; In probe circular hole, inlay copper sheathing, band internal thread in copper sheathing, bottom is inlaid with and is shaped as round inclined-plane organic glass sheet;

H, 4 internal strength bolt columns installing in the upper right corner on right surface on the upper left corner of upper surface on voussoir top and two inner bolt holes in the lower left corner, voussoir top and two inner bolt holes in the lower right corner, internal strength bolt column can regulate length, can play the voussoir that makes to pop one's head in and when scanning is walked, is difficult for the effect swinging at direction of travel managing when butt-weld is detected.

Concrete, the upper right corner on the right surface on voussoir top and the lower right corner arrange respectively a depression platform, in order to corresponding inner bolt hole to be set respectively.

Original probe voussoir is only used in the scanning of butt plates welding seam, without being controlled at direction of travel, swing, owing to easily swinging at direction of travel according to one-tenth in the process of walking, the straight-through ripple that scanning is gone out in TOFD collection of illustrative plates produces zigzag, not straight, impact is easily shone into undetected to the judgement of nearly surface or flaws, thereby is not suitable for the circumferential scanning that curvature is larger.

The utility model is in order to be applicable to the pipe welding seam scanning that curvature is larger, Width both sides on original probe voussoir respectively process two inner bolt holes, to regulate to support probe, in walking, should not swing always in plateau, make it to obtain a more straight straight-through ripple image.

By at four circular holes voussoir top and upper surface bight rectangle dip plane and voussoir top, internal thread hole is also provided with 4 internal strength bolt columns, this internal strength bolt column can regulate length, can play the effect that the voussoir that makes to pop one's head in should not swing at direction of travel when scanning is walked managing when butt-weld is detected.

By adopting technique scheme, the utlity model has following beneficial effect:

Width both sides on original probe voussoir respectively process two inner bolt holes, have solved probe plane and have not swung in plateau during scanning in pipeline cambered surface; By at four circular holes voussoir top and upper surface bight rectangle dip plane and voussoir top, internal strength bolt column can regulate length, can reach the effect that the voussoir that makes to pop one's head in should not swing in walking side when scanning is walked.

Accompanying drawing explanation

Fig. 1 is the probe voussoir of prior art.

Fig. 2 is the straight tube weld seam diffraction time difference method ultrasonic inspection probe voussoir overall schematic of this patent.In this figure, right surperficial two circular holes that are positioned at voussoir top lay respectively at a depression platform in bight.

Fig. 3 is that schematic diagram is looked on a left side of Fig. 2.

Fig. 4 is a sectional view of Fig. 2.

Fig. 5 is the schematic bottom view of the straight tube weld seam diffraction time difference method ultrasonic inspection probe voussoir bottom of this patent.

In figure, 131. cylindrical holes; 132. probe circular holes; The width of 133. voussoir bottoms; The height of 134. voussoir bottoms; The upper surface on 135. voussoir tops; The front surface on 136. voussoir tops; The left surface on 137. voussoir tops; The inner bolt hole in the bight, left surface on 138. voussoir tops and the body of bolt in inner bolt hole; The inner bolt hole in the upper surface bight on 139. voussoir tops; 1310. voussoir left-hand face; 1311. adjusting bolt hole; 1312. copper sheathing.Data connecting line, power lead in each figure all omit.

Embodiment

Below in conjunction with accompanying drawing, this patent is further explained.But the protection domain of this patent is not limited to concrete embodiment.

Embodiment 1

As shown in Figure 2-5, a kind of straight tube weld seam diffraction time difference method ultrasonic inspection probe voussoir of this patent, consists of:

Voussoir bottom: be a rectangle metallic object, the length of voussoir bottom and width are than being 1:(0.7 ~ 1.3), be highly 30% ~ 70% of width;

Voussoir top: be the metallic object that xsect is right-angled trapezium, the top margin length of right-angled trapezium is 40% of base length; The base length of right-angled trapezium is the length of voussoir bottom; The lower surface on voussoir top and rectangle metallic object overlap mutually, the rectangle that the top margin that theupper surface 135 on voussoir top is right-angled trapezium forms, the front and rear surfaces on voussoir top is identical right-angled trapezium face, theleft surface 137 on voussoir top is rectangle dip plane, and the right surface on voussoir top is that rectangle is faced directly; Voussoir top and voussoir bottom are structure as a whole; The upper right corner on the right surface on voussoir top and the lower right corner arrange respectively a depression platform, in order to inner bolt hole to be set respectively.

Be positioned at the right surperficial upper right corner on voussoir top and twoinner bolt holes 139 in bight, the lower right corner, inner bolt hole vertically penetrates into the lower surface of voussoir bottom.

Be positioned at the upper left corner ofupper surface 135 and two inner bolt holes in the lower left corner on voussoir top, inner bolt hole vertically penetrates into the lower surface of voussoir bottom.

Each the corresponding non-penetratingcylindrical hole 131 that is positioned at voussoir front and rear surfaces, these twocylindrical holes 131 are with probe bracket and are connected and fixed hole; Inner without screw thread setting.

A bolt hole that is positioned at voussoir left-hand face 1310, has threaded rod in bolt hole, can regulate or revisecopper sheathing 1312 angles in probe voussoir.

Be positioned at the probecircular hole 132 on theupper surface 135 on voussoir top and the rectangle dip plane on voussoir top; Probecircular hole 132 penetrates into the lower surface of voussoir bottom; In probecircular hole 132, inlaycopper sheathing 1312, the interior band internal thread ofcopper sheathing 1312, bottom is inlaid with and is shaped as round inclined-plane organic glass sheet.

4 internal strength bolt columns installing in the upper right corner on right surface on the upper left corner ofupper surface 135 on voussoir top and two inner bolt holes 139 in the lower left corner, voussoir top and two inner bolt holes in the lower right corner, internal strength bolt column can regulate length.

The utility model is respectively processed two inner bolt holes by the Width both sides on original probe voussoir, to regulate to support probe, should not swing always in plateau in walking, makes it to obtain a more straight straight-through ripple image.By at four circular holes voussoir top and upper surface bight rectangle dip plane and voussoir top, internal thread hole is also provided with 4 internal strength bolt columns, this internal strength bolt column can regulate length, can play the effect that the voussoir that makes to pop one's head in should not swing at direction of travel when scanning is walked managing when butt-weld is detected.

Claims (2)

1. a straight tube weld seam diffraction time difference method ultrasonic inspection probe voussoir, is characterized in that: following part, consist of:

A, voussoir bottom: be a rectangle metallic object, the length of voussoir bottom and width are than being 1:(0.7 ~ 1.3), be highly 30% ~ 70% of width;

B, voussoir top: be the metallic object that xsect is right-angled trapezium, the top margin length of right-angled trapezium is 30% ~ 50% of base length; The base length of right-angled trapezium is the length of voussoir bottom; The upper surface of the lower surface on voussoir top and voussoir bottom overlaps mutually, the upper surface on voussoir top is the rectangle that the top margin of right-angled trapezium forms, the front and rear surfaces on voussoir top is identical right-angled trapezium face, the left surface on voussoir top is the rectangle dip plane that the hypotenuse of right-angled trapezium forms, and the rectangle that the straight flange that the right surface on voussoir top is right-angled trapezium forms is faced directly; Voussoir top and voussoir bottom are structure as a whole;

C, the upper right corner on right surface that is positioned at voussoir top and two inner bolt holes in bight, the lower right corner, inner bolt hole is provided with internal thread, and inner bolt hole vertically penetrates into the lower surface of voussoir bottom;

D, the upper left corner of upper surface that is positioned at voussoir top and two inner bolt holes in the lower left corner, inner bolt hole is provided with internal thread, and inner bolt hole vertically penetrates into the lower surface of voussoir bottom;

E, be positioned at each corresponding non-penetrating cylindrical hole of voussoir front and rear surfaces, these two cylindrical holes are with probe bracket and are connected and fixed hole; Inner without screw thread setting; This voussoir front and rear surfaces refers to by the front surface of voussoir bottom, the front surface voussoir front surface dimerous on voussoir top, and by the rear surface of voussoir bottom, the voussoir dimerous rear surface, rear surface on voussoir top;

F, be positioned at a bolt hole of voussoir left-hand face, in bolt hole, have threaded rod, by regulating the position of threaded rod, can regulate or revise the copper sheathing angle in probe voussoir;

A probe circular hole on the rectangle dip plane on G, the upper surface that is positioned at voussoir top and voussoir top; Probe circular hole penetrates into the lower surface of voussoir bottom; In probe circular hole, inlay copper sheathing, band internal thread in copper sheathing, bottom is inlaid with and is shaped as round inclined-plane organic glass sheet;

H, 4 internal strength bolt columns installing in the upper right corner on right surface on the upper left corner of upper surface on voussoir top and two inner bolt holes in the lower left corner, voussoir top and two inner bolt holes in the lower right corner, internal strength bolt column can regulate length.

2. straight tube weld seam diffraction time difference method ultrasonic inspection probe voussoir according to claim 1, is characterized in that: the upper right corner on the right surface on described voussoir top and the lower right corner arrange respectively a depression platform, in order to inner bolt hole to be set respectively.

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