CN218995260U

CN218995260U - Refraction angle debugging test block for small-diameter thin-wall ultrasonic detection curved surface probe

Info

Publication number: CN218995260U
Application number: CN202223352719.0U
Authority: CN
Inventors: 曾成刚; 池春迎; 曾康洋; 李广欢
Original assignee: Taike Technology Co ltd
Current assignee: Taike Technology Co ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-05-09
Anticipated expiration: 2032-12-13

Abstract

The utility model discloses a refraction angle debugging test block for a small-diameter thin-wall ultrasonic detection curved surface probe, which is characterized by comprising a test block body, wherein the test block body is provided with an inner arc surface and an outer arc surface, and the inner arc surface is provided with a wire slot penetrating through the body; and one side of the surface of the body is marked with a graduated scale, and zero graduation marks are overlapped with one side of the adjacent wire slot. The test block provided by the utility model has novel and unique shape, simple structure, easy processing and convenient field practical application, and fills the blank of the special test block for debugging the refraction angle of the transverse wave curved surface probe of the longitudinal defect of the small-diameter thin-wall tube in the current ultrasonic detection standard.

Description

Refraction angle debugging test block for small-diameter thin-wall ultrasonic detection curved surface probe

Technical Field

The utility model relates to the technical field of ultrasonic detection, in particular to a special test block for adjusting the refraction angle of an ultrasonic curved surface probe of a small-diameter thin-wall tube.

Background

The small-diameter thin-wall pipe is widely applied to the industrial fields of nuclear power, thermal power, aviation and the like. The pipe has extremely strict quality requirements because the pipe works under severe environmental conditions such as high temperature, high pressure, nuclear radiation environment, gas-liquid two-phase scouring or corrosion and the like for a long time. The small-diameter thin-wall pipes may have defects such as cracks, inclusions, pits, layering, scratches and the like in the production process. For small-diameter thin-wall tubes, surface detection, ray detection and ultrasonic phased array detection are generally adopted. The surface detection can only detect near-surface defects, but has the defects of complex radiation detection process, difficult field operation, radiation hazard to human bodies and the like, and the phased array detection has high cost, heavy instrument and is not suitable for large-scale application. At present, the conventional ultrasonic has low cost, flexible operation and convenient carrying, and becomes one of the most common detection methods for small-diameter thin-wall pipes.

The ultrasonic detection method aims at the common standards of the ultrasonic detection of the small-diameter thin-wall pipe, namely, non-destructive detection (ultrasonic detection) of NB/T47013.3-2015 pressure equipment, non-destructive detection of SY/T4109-2013 petroleum and natural gas steel pipelines, non-destructive detection ultrasonic detection technology of GB/T11345-2013 welding seams, detection grade and evaluation, ultrasonic flaw detection and quality grading of JG/T203-2007 steel structures, wherein the standards are not provided with the special test block for debugging the transverse defect curved surface probe of the longitudinal defect except the method for debugging the transverse defect of the small-diameter pipe in the quality grading method of the JG/T203-2007 steel structure, and the phenomenon prevents the application of the ultrasonic detection technology in the longitudinal defect detection of the small-diameter thin-wall pipe.

Therefore, it is very necessary to design a special test block which is convenient to carry on site and can be rapidly used for determining the incidence point and adjusting the refraction angle of the transverse curved surface probe.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a special test block for adjusting the refraction angle of the ultrasonic curved surface probe of the small-diameter thin-wall tube.

The aim of the utility model is achieved by the following technical scheme:

a refraction angle debugging test block for a small-diameter thin-wall ultrasonic detection curved surface probe comprises:

the test block comprises a test block body, wherein the body is provided with an inner arc surface and an outer arc surface, and the inner arc surface is provided with a wire slot penetrating through the body; and one side of the surface of the body is marked with a graduated scale, and zero graduation marks are overlapped with one side of the adjacent wire slot.

Two sharp corners are arranged on two sides of the body, and two cambered surfaces of the body are concentric cambered surfaces; the thickness of the test block is 5.0mm, the width of the test block is 50.0mm, the opening of the wire slot is 0.2mm, the depth of the wire slot is 0.5mm, and the curvature outer radius R1 of the cambered surface meets the curvature outer radius R2 of the detected workpiece: 0.9R ₁ ≤R ₂ ≤1.3R ₁ 。

The scale of the test block is the arc length of the inner diameter r, and the arc length is 1mm and corresponds to the central angle theta _o ＝360/2πr。

One or more embodiments of the present utility model may have the following advantages over the prior art:

the test block has novel and unique shape, simple structure and easy processing; the patent test block has small volume, light weight and convenient carrying and is convenient for field practical application. The method can rapidly determine the incident point and calculate the refraction angle and K value of the curved surface probe, fills the blank of a special debugging test block for the transverse wave curved surface probe of the longitudinal defect of the small-diameter thin-wall tube in the current ultrasonic detection standard, and has practical significance and popularization value.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic diagram of determining the incidence point and the front edge of a curved probe using a test block of the present utility model;

FIG. 3 is a schematic view of the refractive angle and K value calculation of a curved probe using the test block of the present utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail with reference to examples and drawings.

As shown in fig. 1, the overall structure of the present utility model includes: the body, scale, wire casing, body both sides contain two closed angles, and body two cambered surfaces are concentric cambered surfaces, and interior cambered surface wire casing is opened to the wire casing and runs through the body, and body surface one side marks scale, and zero scale line and adjacent wire casing one side coincidence.

The thickness of the special test block of the small-diameter thin-wall tube ultrasonic detection probe is 5.0mm, the width of the special test block is 50.0mm, the opening of the wire slot is 0.2mm, the depth of the wire slot is 0.5mm, and the curvature outer radius R1 of the cambered surface meets the curvature outer radius R2 of the detected workpiece: r1 is more than or equal to 0.9R2 is more than or equal to 1.3R1.

The materials used for the test block should be as same as or similar to the tested workpiece as possible in terms of sound permeability, sound velocity, sound attenuation, materials, heat treatment, surface state and the like.

As shown in fig. 2, the probe incidence point is measured, a curved surface probe is aligned to a sharp angle of a special test block of the probe, the test block is fixed, the curved surface probe is moved back and forth and rotated, the highest reflection echo when the curved surface of the probe contacts with the sharp angle is found out from an ultrasonic instrument, and the incidence point A of the curved surface probe and the length of the front edge L of the curved surface probe are determined;

as shown in fig. 3, measuring the K value of the probe, coupling a curved surface probe with the upper surface of a special test block of the probe, finding the highest reflection echo of a linear groove, and fixing the position of the curved surface probe at the moment;

the incident point A is taken as a normal line perpendicular to the upper surface of the test block, and the intersection point of the marked normal line and the inner surface of the test block is D. And the point B of the notch is perpendicular to the normal line, the intersection point of the marked perpendicular line and the normal line is O, and the intersection point of the marked perpendicular line and the inner surface of the test block is C. The included angle theta between the mark AB and AO is the refraction angle of the curved surface probe.

Reading the arc length BC, wherein the chord length BC is as follows:

the incident point to trunking distance AB can be measured by a digital ultrasonic flaw detector or ruler. In the case of the right-angled triangle deltaabo,

so the refraction angle θ of the curved probe is:

the probe K value is obtainable according to equation (6):

/>

according to (5), (6) and (7), the probe K value can be obtained by measuring the arc length BC and AB:

although the embodiments of the present utility model are described above, the embodiments are only used for facilitating understanding of the present utility model, and are not intended to limit the present utility model. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the appended claims.

Claims

1. The refraction angle debugging test block for the small-diameter thin-wall ultrasonic detection curved surface probe is characterized by comprising a test block body, wherein the test block body is provided with an inner arc surface and an outer arc surface, and the inner arc surface is provided with a wire slot penetrating through the test block body; and one side of the surface of the body is marked with a graduated scale, and zero graduation marks are overlapped with one side of the adjacent wire slot.

2. The refraction angle debugging test block for the small-diameter thin-wall ultrasonic detection curved surface probe according to claim 1, wherein two sharp corners are arranged on two sides of the body, and two cambered surfaces of the body are concentric cambered surfaces.

3. The refraction angle debugging test block for small-diameter thin-wall ultrasonic detection curved surface probe according to claim 1, wherein the thickness of the test block is 5.0mm, the width of the test block is 50.0mm, the opening of a wire slot is 0.2mm, and the depth of the slot isThe curvature outer radius R1 of the cambered surface is 0.5mm and meets the curvature outer radius R2 of the detected workpiece: 0.9R ₁ ≤R ₂ ≤1.3R ₁ 。

4. The refraction angle debugging test block for small-diameter thin-wall ultrasonic detection curved surface probe according to claim 1, wherein the scale of the test block is the arc length of an inner diameter r, and the arc length is 1mm and corresponds to a central angle theta _o ＝360/2πr。

5. The refraction angle debugging test block for the small-diameter thin-wall ultrasonic detection curved surface probe according to claim 1, wherein the material adopted by the test block has the same or similar sound permeability, sound velocity, sound attenuation, material, heat treatment and surface state as the tested piece.