WO2019127457A1 - 一种小径管相控阵超声检测多用途对比试块 - Google Patents

一种小径管相控阵超声检测多用途对比试块 Download PDF

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WO2019127457A1
WO2019127457A1 PCT/CN2017/120120 CN2017120120W WO2019127457A1 WO 2019127457 A1 WO2019127457 A1 WO 2019127457A1 CN 2017120120 W CN2017120120 W CN 2017120120W WO 2019127457 A1 WO2019127457 A1 WO 2019127457A1
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test block
phased array
scallop
diameter
array ultrasonic
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PCT/CN2017/120120
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English (en)
French (fr)
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郭相吉
杜传国
丁成海
齐高君
徐学堃
庞继勇
张勇
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山东电力建设第一工程公司
山东丰汇工程检测有限公司
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Priority to PCT/CN2017/120120 priority Critical patent/WO2019127457A1/zh
Publication of WO2019127457A1 publication Critical patent/WO2019127457A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects

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  • the invention relates to a multi-purpose comparative test block for phase-detection ultrasonic testing of small-diameter tubes or medium-diameter thin-wall tubes, belonging to the field of non-destructive testing.
  • Phased array ultrasonic inspection technology is one of the most advanced cutting-edge non-destructive testing technologies. Because it uses electronically controlled beam focusing and scanning, the probe is small and has good sound beam accessibility. It can perform complex geometry workpieces. Scanning and other technical advantages, so it is more and more widely used in the small-diameter pipeline inspection of the power industry. For phased array detection, it is also necessary to use the test block for instrument equipment calibration. The test block is the same as the instrument probe and is an important tool in phased array ultrasonic testing.
  • phased array ultrasonic testing As a new detection technology, phased array ultrasonic testing technology has been promulgated and implemented, but there is no experience acceptance standard. In phased array ultrasonic testing, the sensitivity is too high or too low, too high, too high, too many clutter, difficult to judge defects, too low will lead to missed detection of defects. Therefore, the phased array ultrasonic inspection now uses the artificial reflector of the DL-1 or GS test block to make the DAC curve, and the R50 or R100 semicircle test block is used for the angle gain correction.
  • the probe used for phased array detection is a self-focusing one-dimensional line array curved surface probe, and the number of wafers is greater than or equal to 16 wafers.
  • Phased Array Probes During the instrument calibration process, if the existing test blocks are used for instrument calibration and review, the accuracy of the test results will be affected.
  • phased array instrument adjustment The DL-1 and GS test blocks can only be used to make the DAC curve. The use is single, and other functions of the test block are not applicable to the phased array probe.
  • the angle gain correction, DAC curve production and scanning sensitivity determination of the phased array must be carried out on different test blocks separately. It is necessary to purchase different types of test blocks, and the cost is high.
  • the width of the test block is narrow.
  • the width of the phased array small diameter tube probe is 22mm
  • the width of the DL-1 test block is 15mm
  • the width of the GS test block is 20mm, which is smaller than the width of the phased array probe.
  • the curvature of the wedge of the phased array probe should be consistent with the curvature of the test block.
  • the gap x between the edge of the wedge and the contact surface of the test block should not exceed 0.5 mm. Calculate according to this requirement, the curvature of the two types of test blocks None of them can meet the requirements.
  • the present invention mainly describes a small-diameter tube or a medium-diameter thin-walled tube phased array ultrasonic testing contrast test block which is simple in structure and simple in operation.
  • a multi-purpose contrast test block for small-diameter tube phased array ultrasonic testing wherein both ends of the test block are provided with a scallop, and between the two scallops, a square portion, the width of the scallop and the width of the square portion The same; two of the scallops are arranged in a central symmetry;
  • the square portion is provided with two sets of transverse through hole regions, and the two sets of the horizontal through hole regions each comprise five horizontally arranged through holes, and the two sets of the transverse through hole regions are arranged in a central symmetry.
  • the small-diameter tube phased array ultrasonic inspection multi-purpose comparison test block has a circular arc surface corresponding to a circle having a diameter of 50 mm and a thickness of the scallop portion of 22 mm.
  • the small-diameter tube phased array ultrasonic inspection multi-purpose contrast test block has a short transverse hole diameter of 2 mm, and the distance between each short transverse hole and the probe placement surface is 7 mm, and the adjacent short horizontal hole
  • the distance between the center of the circle is 6 mm; the depth of the short side of the innermost side is 2 mm, the horizontal distance from the center of the scallop is 28 mm; the depth of the short horizontal hole at the middle position is 4 mm; and the depth of the outermost short horizontal hole is 6 mm.
  • the small-diameter tube phased array ultrasonic testing multi-purpose comparative test block has a diameter of 2 mm, and the distance from the probe contact surface is 10 mm, 20 mm, 30 mm, 40 mm, and 50 mm, respectively.
  • the above-mentioned small-diameter tube phased array ultrasonic testing multi-purpose comparative test block is made of carbon steel or P91 material.
  • test block designed and manufactured by the invention has various functional uses, and the test block has a simple structure, convenient operation and convenient carrying.
  • test block adopts two separate 1/4 sector designs to correct the angle gain of the wedge probe with corresponding curvature, which solves the problem that the flat wedge must be replaced for angle correction in the past.
  • the test block has a short cross hole setting, and the scanning sensitivity is determined, which avoids the problem that the previous scanning sensitivity is difficult to determine.
  • Figure 1 is a front elevational view of a test block of the present invention
  • FIG. 2 is a top plan view of a test block of the present invention
  • Figure 3 is a side elevational view of the test block of the present invention.
  • 1 and 1' are sectoral portions; 2 and 2' are first short transverse holes; 3 and 3' are second short transverse holes; 4 and 4' are third short transverse holes; 5 and 5' are Center of the sector; 6 and 6' are transverse holes; 7 probe placement surface; 8 lower probe placement surface.
  • the invention mainly describes a small-diameter tube or a medium-diameter thin-wall tube phased array ultrasonic testing contrast test block with simple structure and simple operation in the field.
  • the comparative test block comprises: one end is provided with a scalloped portion 1, the width of the scalloped portion is the same as the width of the test block; the other end is also provided with a scalloped portion 1', the two scallops are the same size and opposite directions; the two scallops There are 3 short horizontal holes 2, 3, 4 and 2', 3', 4' on the upper part; there are several horizontal through holes 6 and 6' on the comparison test block, and the surface 7 or the probe is placed on the probe during debugging.
  • the placement surface 8 is performed, and the radius of curvature of the two probe placement surfaces is different; the center of the sector portion is 5 and 5'.
  • the comparative test piece is made of carbon steel or P91 material.
  • the comparative test piece has uniform material, has no defects affecting use, and has good acoustic performance.
  • the parallelity, verticality, smoothness and dimensional accuracy of the comparative test blocks are all in accordance with the requirements.
  • the sector portion 1 of the comparative test block has a radius of 50 mm and a thickness of 22 mm; the sector portion 1' has the same specifications as the sector portion 1;
  • the short transverse holes 2, 3, 4 and 2', 3', 4' on the two side sector portions have an aperture of ⁇ 2, and the short and transverse holes are close to each other with a probe placement surface of 7 mm, adjacent short transverse holes 2 and
  • the distance between 3 (or 3 and 4) is 6 mm;
  • the horizontal hole 4 or 4' is 28 mm horizontally from the center of the sector, and the depth is 2 mm;
  • the short transverse hole 3 or 3' is 4 mm;
  • the short horizontal hole 2 or 2' depth is 6mm.
  • the transverse through holes 6 and 6' on the comparative test block are ⁇ 2, a total of 10, and the distance from the probe contact surface 7 or the surface 8 is 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, respectively. , 50mm.
  • the comparison test block is a series of test blocks, which are composed of a plurality of blocks, and the curvature of the probe placement faces 7 and 8 of the comparison test block should meet the requirements in Table 1.
  • R1 is the radius of curvature of the sector of the upper probe placement surface
  • R2 is the radius of curvature of the sector of the lower probe placement surface
  • the comparative test block of the invention combines the functions and features of a plurality of test blocks, has wide application, complete functions, simple structure and is convenient to carry; increases the width and thickness of the test block, and improves the closeness of the wedge and the test block.
  • the test block adopts the curved surface design mode, and the angle correction can be directly performed by the curved wedge;
  • the comparative test block of the design can meet the condition that the gap between the wedge edge and the test block contact surface should not exceed 0.5 mm, and meets the standard requirements. Scope;
  • the comparison test block of this design adds three short horizontal holes to determine the scanning sensitivity. It can solve various problems in the conventional test block.
  • the test block designed by the present invention can realize the angle gain correction of the phased array, the DAC curve making, the scanning sensitivity determination, and the design test block width is the same as the probe width.
  • the curvature is consistent with the wedge and satisfies the condition that the gap x between the edge of the wedge and the contact surface of the test piece should not exceed 0.5 mm.
  • the angle gain correction can be corrected for each curvature wedge.
  • the separate scanning sensitivity is used to determine the reflector, which reduces the use of the test block, improves the adjustment efficiency of the phased array ultrasonic testing instrument, and ensures that the calibration result is more accurate. .

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Abstract

一种小径管或中大径薄壁管相控阵超声检测多用途对比试块，属于无损检测领域。试块的两端均设置有一个扇形部（1，1'），两个扇形部（1，1'）之间为方形部，扇形部（1，1'）宽度与方形部的宽度相同；两个扇形部（1，1'）呈中心对称布置；扇形部（1，1'）的弦面上水平布置三个短横孔（2，3，4，2'，3'，4'）；方形部上设置有两组横通孔区，两组横通孔区均包括有竖直布置的五个横通孔（6，6'），两组横通孔区呈中心对称布置。

Description

一种小径管相控阵超声检测多用途对比试块 技术领域
本发明涉及一种小径管或中大径薄壁管相控阵超声检测多用途对比试块，属于无损检测领域。
背景技术
相控阵超声检测技术是目前最先进前沿的无损检测技术之一，因其采用电子方式控制声束聚焦和扫描，探头小巧，具有良好的声束可达性，能对复杂几何形状的工件进行扫查等技术优点，所以在电力行业小径管道检测中得到越来越广泛的应用。相控阵检测时，也需要采用试块进行仪器设备调校，试块和仪器探头一样，是相控阵超声检测中重要工具。
目前，电力行业常用的小径管焊接接头对比试块有DL-1、GS试块。相控阵超声检测技术作为一种新的检测技术，国家工艺标准已颁布实施，但无具体验收标准。相控阵超声检测时，其灵敏度太高或者太低都不好，太高杂波多，判断缺陷困难，太低会引起缺陷的漏检。因此，现在相控阵超声检测常用DL-1或GS试块的人工反射体来制作DAC曲线，采用R50或R100半圆试块进行角度增益修正。
由于电站锅炉小径管管径小、管壁薄，相控阵检测使用的探头为自聚焦一维线阵曲面探头，晶片数量大于等于16晶片。相控阵探头在仪器调校过程中，若使用现有试块进行仪器调校和复核，会影响检测结果的准确性。
技术问题
1、相控阵仪器调节采用DL-1、GS试块仅能进行DAC曲线的制作，用途单一，试块的其它功能对相控阵探头不适用。
2、相控阵的角度增益修正、DAC曲线制作、扫查灵敏度确定需分别在不同试块上进行，需要购置不同类型的试块，成本高。
3、试块的宽度较窄。相控阵小径管探头宽度22mm，DL-1试块宽度15mm、GS试块宽度20mm均小于相控阵探头宽度，采用此类试块调节仪器，探头不能与试块曲面完全贴合。
4、根据标准规范要求，相控阵探头楔块的曲率应与试块曲率吻合，楔块边缘与试块接触面的间隙x不应大于0.5mm，依据此要求进行计算，两类试块曲率均不能满足要求。
技术解决方案
为了解决上述问题，本发明主要讲述了一种结构简单、现场操作简便的小径管或中大径薄壁管相控阵超声检测对比试块。
一种小径管相控阵超声检测多用途对比试块，该试块的两端均设置有一个扇形部，两个所述扇形部之间为方形部，所述扇形部宽度与方形部的宽度相同；两个所述扇形部呈中心对称布置；
所述扇形部的弦面上水平布置三个短横孔；
所述方形部上设置有两组横通孔区，两组所述横通孔区均包括有竖直布置的五个横通孔，两组所述横通孔区呈中心对称布置。
上述小径管相控阵超声检测多用途对比试块，所述扇形部的圆弧面为对应直径为50mm圆形的四分之一，所述扇形部的厚度为22mm。
上述小径管相控阵超声检测多用途对比试块，所述扇形部上的短横孔直径为2mm，各个短横孔与其接近探头放置面之间的距离均为7mm，相邻短横孔之间圆心距为6mm；最里侧的短横孔深度为2mm、距离扇形部圆心的水平距离为28mm；中间位置的短横孔深度为4mm；最外侧的短横孔深度为6mm。
上述小径管相控阵超声检测多用途对比试块，所述横通孔直径均为2mm，距离探头接触面的距离分别为10mm、20mm、30mm、40mm、50mm。
上述小径管相控阵超声检测多用途对比试块，所述对比试块为碳钢或P91材质制成。
有益效果
1、本发明设计制作的试块，具有多种功能用途，试块结构简单，操作方便，便于携带。
2、试块采用两个分开的1/4扇形部设计，能够对相应曲率的楔块探头进行角度增益修正，解决了以往检测时必须更换平楔块进行角度修正的问题。
3、对试块扇形部曲率进行调整，满足标准规范中楔块边缘与试块接触面的间隙x不应大于0.5mm的条件要求。
4、试块增加了短横孔设置，进行扫查灵敏度确定，避免了以往扫查灵敏度确定困难的问题。
附图说明
图1为本发明试块的正视示意图；
图2为本发明试块的俯视示意图；
图3为本发明试块的侧视示意图；
图中：1与1＇为扇形部部；2与2＇为第一短横孔；3与3＇为第二短横孔；4与4＇为第三短横孔；5与5＇为扇形部部圆心；6与6＇为横通孔；7上探头放置面；8下探头放置面。
本发明的最佳实施方式
下面结合附图对本发明进一步解释说明。
本发明主要讲述了一种结构简单、现场操作简便的小径管或中大径薄壁管相控阵超声检测对比试块。本对比试块包括：一端设有一个扇形部部1，扇形部部宽度与试块宽度相同；另一端同样设有一个扇形部部1＇，两扇形部部大小相同，方向相反；两扇形部部上均有3个短横孔2,3,4和2＇,3＇,4＇；对比试块上设有数个横通孔6和6＇，调试时在探头上放置面7或探头下放置面8上进 行，两探头放置面的曲率半径不相同；扇形部部面圆心为5和5＇。
所述对比试块为碳钢或P91材质制成。
所述对比试块材质均匀，无影响使用的缺陷，具有良好的声学性能。
所述对比试块平行度、垂直度、光洁度和尺寸精度都符合要求。
所述对比试块的扇形部部1半径为50mm的1/4扇形部，厚度为22mm；扇形部部1＇规格与扇形部部1相同；
所述两侧扇形部部上的短横孔2,3,4和2＇,3＇,4＇，孔径为φ2，各短横孔距离相近探头放置面为7mm，相邻短横孔2和3(或3和4)之间间距为6mm；短横孔4或4＇距离扇形部部圆心水平距离为28mm，深度为2mm；短横孔3或3＇深度为4mm；短横孔2或2＇深度为6mm。
所述对比试块上的横通孔6和6＇为φ2，共10个，距离探头接触面7或面8的距离分别为5mm、10mm、15mm、20mm、25mm、30mm、35mm、40mm、45mm、50mm。
所述对比试块为系列试块，由多块组成，对比试块的探头放置面7、8曲率应符合表1中规定。
表1试块扇形部曲率半径   单位为mm
Figure PCTCN2017120120-appb-000001
其中R1为上探头放置面的扇形部曲率半径；R2为下探头放置面的扇形部曲率半径；
使用时，根据被检管件选择相应曲率的楔块及探头，根据被检管外径大小按照表1中要求，选择对应的试块编号，在对应的扇形部曲率半径上进行仪器调节，利用扇形部部进行角度增益修正，根据被检测管件厚度，使用横通孔6进行灵敏度的校准及DAC曲线制作或灵敏度的校准，调校完成后，探头对准扇形部部的短横孔位置，按照检测能力要求，调节增益至能够检测出2mm短横孔或4mm短横孔或6mm短横孔，仪器调节完成。
工业实用性
本发明的对比试块结合多个试块的功能和特点，用途广、功能全，结构简单，便于携带；增加了试块宽度和厚度，提高了楔块与试块的贴合紧密度。同时试块采用曲面设计模式，可通过曲面楔块直接进行角度修正；本设计的对比试块，能满足楔块边缘与试块接触面的间隙x不应大于0.5mm的条件要求，符合标准要求范围；本设计的对比试块，增加了三个短横孔，可进行扫查灵敏度的确 定。可解决常规试块存在的各类问题，本发明设计的试块，仅需一个便能够实现相控阵的角度增益修正、DAC曲线制作、扫查灵敏度确定，设计的试块宽度与探头宽度相同，曲率与楔块吻合，满足楔块边缘与试块接触面的间隙x不应大于0.5mm的条件要求。角度增益修正可对应每一个曲率楔块进行修正，设有单独的扫查灵敏度确定反射体，减少了试块的使用，提高相控阵超声检测仪器调校效率，而且保证了调校结果更加准确。

Claims (4)

  1. 一种小径管相控阵超声检测多用途对比试块，其特征在于：该试块的两端均设置有一个扇形部，两个所述扇形部之间为方形部，所述扇形部宽度与方形部的宽度相同；两个所述扇形部呈中心对称布置；
    所述扇形部的弦面上水平布置三个短横孔；
    所述方形部上设置有两组横通孔区，两组所述横通孔区均包括有竖直布置的五个横通孔，两组所述横通孔区呈中心对称布置；所述扇形部上的短横孔直径为2mm，各个短横孔与其接近探头放置面之间的距离均为7mm，相邻短横孔之间圆心距为6mm；最里侧的短横孔深度为2mm、距离扇形部圆心的水平距离为28mm；中间位置的短横孔深度为4mm；最外侧的短横孔深度为6mm。
  2. 根据权利要求1所述小径管相控阵超声检测多用途对比试块，其特征在于：所述扇形部的圆弧面为对应直径为50mm圆形的四分之一，所述扇形部的厚度为22mm。
  3. 根据权利要求3所述小径管相控阵超声检测多用途对比试块，其特征在于：所述横通孔直径均为2mm，距离探头接触面的距离分别为10mm、20mm、30mm、40mm、50mm。
  4. 根据权利要求1所述小径管相控阵超声检测多用途对比试块，其特征在于：所述对比试块为碳钢或P91材质制成。
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