CN201508351U

CN201508351U - Petroleum pipe end longitudinal and circumferential ultrasonic defect detection combination probe

Info

Publication number: CN201508351U
Application number: CN200920015248XU
Authority: CN
Inventors: 常少文
Original assignee: LIANGYANG XIMULAISI OCTG MANUFACTURING Co Ltd
Current assignee: LIANGYANG XIMULAISI OCTG MANUFACTURING Co Ltd
Priority date: 2009-07-14
Filing date: 2009-07-14
Publication date: 2010-06-16
Anticipated expiration: 2019-07-14

Abstract

The utility model relates to the ultrasonic defect detection technology field, in particular to a combination probe used for petroleum pipe end longitudinal and circumferential ultrasonic defect detection and inspection. The combination probe is characterized in that the longitudinal and circumferential ultrasonic defect detection combination probe comprises a longitudinal wave straight probe, an organic glass probe wedge and a transverse wave angle probe, wherein the transverse wave angle probe is converted into a variable-angle transverse wave angle probe after being locked by aid of threads on a probe seat and grooves on the wedge, the variable-angle transverse wave angle probe is used for longitudinal defect detection and detecting longitudinal defects of steel pipes, the transverse wave angel probe adhered on the organic glass probe wedge is used for detecting defects circumferentially and detecting transverse defects of steel pipes. By adopting two sets of probes to simultaneously work in different positions and directions, longitudinal and circumferential defect detection can be completed in one-time defect detection. The ultrasonic defect detection combination probe has the advantages of providing fast defect detection and inspection, substantially shortening defect detection time of steel pipes, increasing working efficiency of defect detection, and satisfying defect detection production requirements.

Description

Vertical and the circumferential UT (Ultrasonic Testing) coupling probe of oil country tubular goods pipe end

Technical field

The utility model relates to the UT (Ultrasonic Testing) technical field, particularly a kind of coupling probe that is used for the vertical and circumferential manual ultrasonic carrying out flaw detection of pipe end of oil country tubular goods.

Background technology

The utility model relates to the UT (Ultrasonic Testing) technical field, the coupling probe that particularly a kind of vertical and circumferential UT (Ultrasonic Testing) of pipe end that is used for oil country tubular goods detects.In the Non-Destructive Testing field of oil country tubular good, ultrasound examination has obtained using widely as a kind of effective detection mode.It utilizes characteristics such as the velocity of propagation of ultrasound wave in metal be fast, and the flaw echo that reflects by analysis detects the judgement defective.At present, in the domestic oil country tubular good manufacture process there be much the ultrasound examination instrument, but the on-the-spot automatic ultrasonic inspection that uses detects a lot of problems, as limitting because of the automatic ultrasonic inspection detecting instrument, leave the flaw detection blind zone problem of 50～100mm at pipe end, be not resolved.

The API spec 5CT of American Petroleum Institute (API) standard code: need body after carrying out automatic flaw detection, untested pipe end, otherwise cut; Detect by manually carrying out the pipe end fluorescent magnetic particle flaw detection; By manually carrying out pipe end manual ultrasonic carrying out flaw detection.Excise untested pipe end, can cause the waste of resource.The pipe end MPI fluorescent magnetic particles detects defectives such as wire screw thread to tubing, pupil, blind hole can a large amount of omissions, and it is bad to demagnetize, and the remanent magnetism harm on tubing is bigger, are not easy to the pipe thread processing after the carrying out flaw detection.And some high grade of steel products in the pipe end manual ultrasonic carrying out flaw detection, particularly API spec 5CT standard, as: grade of steels such as P110, C90, T95, Q125, standard-required all need carry out the defects detection of the vertical and circumferential both direction on the surfaces externally and internally.Ultrasonic velocity is propagated along circumferential direction in tube wall when detecting the defective of longitudinal direction, and ultrasonic velocity is in axial direction propagated in tube wall when detecting the defective of horizontal direction.Vertical and circumferential defects detection all should be carried out by two different directions in body.

When existing UT (Ultrasonic Testing) technology is implemented to detect to the vertical and circumferential all kinds of defectives of oil country tubular goods, defect property according to the body mother metal, shear wave contact defectoscopy is adopted in method of detection commonly used, each detects vertical and circumferential defects detection once, the pipe end of a steel pipe detects, at least need come respectively to check respectively one time by two people with vertically and circumferentially popping one's head in, or one personal two kinds vertically and circumferentially probe respectively visit respectively one time, and the wear extent of probe is quite big, and in the process that detects, because the probe wearing and tearing cause angle to change, also need frequent verification sensitivity, in case the defective omission, though this method of detection can guarantee the quality of detecting a flaw, but flaw detection efficient is low, is unfavorable for the flaw detection of large quantities of buret material.

Summary of the invention

For addressing the above problem, the purpose of this utility model is to provide a kind of and is used for the vertical and circumferential UT (Ultrasonic Testing) coupling probe of oil country tubular goods pipe end, guarantee to differentiate defective accurately and reliably, this flaw detection coupling probe is by compressional wave normal probe and organic glass probe voussoir, changing into the variable angle transverse wave double-bevel detector after the groove locking through screw thread on the probe socket and voussoir top vertically detects a flaw, detect the steel pipe longitudinal defect, and be bonded on the organic glass probe voussoir, become the transverse wave double-bevel detector of 90 ° of vertical direction circumferentially to detect a flaw with it, detect the coupling probe that the steel pipe transverse defective is formed.And install antifriction metal (AFM) additional in organic glass probe voussoir both sides, guarantee the wear-resistant degree of probe.

Vertical and the circumferential UT (Ultrasonic Testing) coupling probe of the utility model oil country tubular goods pipe end, it is characterized in that principle of work is that this flaw detection coupling probe adopts two groups of probes after different directions, diverse location organic assembling, according to ultrasound wave superposition principle and Huygens' principle as can be known: after several train waves meet, each train wave still keeps their original separately characteristics constant, and moves on according to the own original direction of propagation.Utilize Huygens' principle, though can determine that hyperacoustic direction of propagation of different wave source radiation is different, but can receive the echo of ultrasonic reflections separately of different directions equally, and they carry out flaw detection work separately simultaneously, once flaw detection can be finished vertical and circumferential ultrasound wave and detects a flaw synchronously, and non-interference, the probe of two different directions receives the defect reflection signal and can be directly reflected on the instrument video screen, and this has established theoretical foundation with regard to the coupling probe of detecting a flaw synchronously for vertical and circumferential ultrasound wave.

Compared with prior art, the utility model adopts two groups of probes to carry out flaw detection work simultaneously at different directions, diverse location, the scanning of once detecting a flaw can be finished vertical and circumferential ultrasound wave and detect a flaw synchronously, the flaw detection time can obviously be shortened, testing efficient and speed have been improved, because voussoir is wear-resisting, deviation is little, and head angle changes very little, it is also better to be coupled, highly sensitive, to stablize, the voussoir wearing and tearing are very little, need not to change, saved the consumption of inspection material,, guaranteed the flaw detection quality for defective recall rate height dissimilar, different orientation.Improve production efficiency simultaneously, reduced production cost, can be widely used in the carrying out flaw detection of petroleum industry steel pipe.

Description of drawings

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the vertical view of structural representation Fig. 1 of the present utility model

Fig. 3 is the right view of structural representation Fig. 1 of the present utility model

When Fig. 4 is vertical detection of the present utility model the velocity of sound in tube wall along circumferentially propagating synoptic diagram

The velocity of sound was propagated synoptic diagram vertically when Fig. 5 was circumferential detection of the present utility model in tube wall

Among the figure: compressional wave normal probe 1, organic glass probe voussoir 2, transverse wave double-bevel detector 3, antifriction metal (AFM) 4, steel pipe 5.

Embodiment

Below in conjunction with description of drawings embodiment of the present utility model.

The utility model mainly is at 100～300m m, wall thickness oil pipe and the sleeve pipe at 5～30mm at the tubing of petroleum industry special use, diameter.

As Fig. 1, Fig. 2, shown in Figure 3, vertical and the circumferential UT (Ultrasonic Testing) coupling probe of the utility model oil country tubular goods pipe end, it is characterized in that this coupling probe is by compressional wave normal probe 1 and organic glass probe voussoir 2, changing into the variable angle transverse wave double-bevel detector after the groove locking through screw thread on the probe socket and voussoir top vertically detects a flaw, detect the steel pipe longitudinal defect, and be bonded on the organic glass probe voussoir, become the transverse wave double-bevel detector 3 of 90 ° of vertical direction circumferentially to detect a flaw with it, the coupling probe that the vertical and circumferential UT (Ultrasonic Testing) that detection steel pipe transverse defective is formed detects.

As Fig. 4, shown in Figure 5, the vertical and circumferential UT (Ultrasonic Testing) coupling probe of the utility model oil country tubular goods pipe end when vertically detecting the velocity of sound in tube wall when circumferentially propagating synoptic diagram and circumferentially detect the velocity of sound in tube wall, propagate synoptic diagram vertically.

The design of described organic glass probe voussoir 2 face shapings is according in the tubing transverse wave testing method, because of detection tubing all satisfies the requirement of the wall thickness external diameter of wall thickness t, outer diameter D than t/D＜0.2, and detection when realizing surfaces externally and internally, incident angle should satisfy Sin ^-1(C _L1/ C _L2)＜α＜Sin ^-1(rC _L1/ RC _S2) incident angle allowed band formula, C in the formula _L1Be probe voussoir longitudinal wave velocity, C _L2Be steel pipe longitudinal wave velocity, C _S2For steel pipe transverse wave velocity, r are that pipe diameter, R are outer diameter of steel pipes.Because of certain incident angle correspondence a fixing refraction angle, so the selection of incident angle is the selection at refraction angle.Consider and to select the scope of incident angle permission and the principle that obtains higher shear wave transmissivity according to the tubing specification, can choose according to " the best shear refraction angle of tubing shear wave contact method flaw detection " the best shear refraction angle of part specification tubing according to practical experience, and be that 47 °, refraction angle β are 60 ° through being taken into firing angle α after calculating thus, as shown in Figure 4, again according to the face shaping of being determined organic glass probe voussoir 2 by inserting tube material specification external diameter R, as shown in the figure.For preventing the clutter reflection at voussoir edge, after compressional wave normal probe 1 is through organic glass probe voussoir 2, change into the forward position of variable angle transverse wave double-bevel detector, promptly a side of organic glass probe voussoir 2 processes a plurality of 60 ° wedge angles, to absorb the reflection clutter.And install antifriction metal (AFM) 4 additional in organic glass probe voussoir both sides, guarantee the wear-resistant degree of probe.

Change into the variable angle transverse wave double-bevel detector after the groove locking of described compressional wave normal probe 1 through screw thread on the probe socket and organic glass probe voussoir 2 tops and vertically detect a flaw, detect the steel pipe longitudinal defect.

The reconditioning that before bonding, will on the same specification coupon, be coupled of described transverse wave double-bevel detector 3, organic glass probe voussoir 2, the wave height of reflection wave of inside and outside artificial cutting that makes two probes is near (error 2db), transverse wave double-bevel detector 3 is according to actual reconditioning probe and the correction position on organic glass probe voussoir 2 then, cement with 502 bonding agents again, circumferentially detect a flaw, detect the steel pipe transverse defective.

The connection of the probe line of described compressional wave normal probe 1, transverse wave double-bevel detector 3: if use analog ultra-sonic defect detector (CTS-22 type etc.), the line of directly will popping one's head in is received on two sockets of instrument, and instrument is arranged on single-

shot list receipts

1,2 gears and puts; If the use digital ultrasonic flaw detector need be with two probe lines and connecing, receive on the single-shot list receipts socket with a plug and get final product.On the sample pipe of artificial cutting, the wave height of the reflection wave of inside and outside wall cutting is adjusted scan sensitivity in proportion then, reserve the benchmark wave height, can carry out the vertical and circumferential UT (Ultrasonic Testing) of oil country tubular goods pipe end simultaneously, because the longitudinal and transverse ripple direction difference that the coupling probe emission receives, therefore ultrasonic beam can not produce interference between mutually, thereby can realize vertically and circumferentially flaw detection synchronously.

The utility model coupling probe is detected a flaw applicable to the pipe end manual ultrasonic of high steel level oil conduit, sleeve pipe product, as: grade of steels such as P110, C90, T95, Q125.

Related " the tubing shear wave contact method flaw detection best shear refraction angle " of the utility model coupling probe chosen, and compressional wave normal probe 1, transverse wave double-bevel detector 3 all be current techiques of this area, is not described in detail at this.

Claims

1. vertical and circumferential UT (Ultrasonic Testing) coupling probe of oil country tubular goods pipe end, it is characterized in that changing into the variable angle transverse wave double-bevel detector after this coupling probe is by compressional wave normal probe and organic glass probe voussoir, groove locking through screw thread on the probe socket and voussoir top vertically detects a flaw, detects the steel pipe longitudinal defect, and be bonded on the organic glass probe voussoir, become the transverse wave double-bevel detector of 90 ° of vertical direction circumferentially to detect a flaw, detect the coupling probe of the vertical and circumferential manual ultrasonic carrying out flaw detection that the steel pipe transverse defective formed with it.