CN87214287U - Fault locating rule for ultrasonic flaw detection - Google Patents

Abstract

The utility model discloses a fault locating rule for ultrasonic flaw detection, composed of a ruler body, a slide ruler and a vernier. The ruler body is composed of a panel (5), limited arms (2), (3) and laths (6), (7). An oblique line group labelled with K value is arranged on the panel (5). A K dimension scale and an X dimension scale are respectively arranged on the laths (6), (7). The middle point of the slide rule (4) is provided with a coordinate system. The both sides are provided with a C dimension scale and an X-[F] dimension scale. The four dimension scales meet the calculation requirement of the locating rule for flaw detection. The locating rule can carry out quick positioning on site matching with the ultrasonic flaw detector conveniently without carrying out the complex mathematical calculation.

Description

Fault locating rule for ultrasonic flaw detection

The utility model is about the ultrasonic flaw detection locating device, more particularly, is about ultrasonic transverse wave flaw detection defect location chi.

At present, when using ultra-sonic defect detector that equipment such as pressure vessel are carried out nondestructive examination, also need to carry out horizontal level and the buried depth that a series of loaded down with trivial details digital computation could be determined defective.Chinese Water Conservancy electric power publishing house in January, 1985 has been introduced the method (seeing the 196th page of this book) of calculating defect level position and buried depth in new one edition " UT (Ultrasonic Testing) " book, and wherein, the formula that calculates the defect level position is:

L＝Wsinβ

The formula that calculates the defective buried depth is:

d＝WCosβ－（n－1）T n＝1，3，…

＝d′－（n－1）T

d＝nT－WCosβ n＝2，4，…

＝nT－d′

Because this calculation of complex trouble, the reviewer is difficult for accepting, thereby applying of ultrasonic flaw detection technology is restricted.

The present known slipstick of engineering technical personnel can calculate multiplication, division, evolution, logarithm etc. easily, but can not be directly used in horizontal level and the buried depth that calculates defective.

The purpose of this utility model provides a kind of ultrasonic flaw detection positioning rule simple in structure, wieldy, and it can cooperate the ultrasonic flaw detection instrument that defective is carried out location fast, scene, need not to carry out loaded down with trivial details mathematical computations.

The purpose of this utility model realizes that by following measures ultrasonic flaw detection positioning rule of the present utility model is made of blade, slide rule, vernier.Wherein, blade (1) is made up of panel (5), position limit arm (2) and (3), lath (6) and (7).Slide rule (4) between panel (5) and lath (6) and (7) notch arranged, so that can horizontally slip.Be carved with K value oblique line on the outside surface of panel (5), be carved with K footage number and X footage number on lath (6) and (7) respectively.The place is provided with coordinate system in the middle of the one side of slide rule (4), and the both sides of slide rule (4) another side are carved with c footage number and x respectively _FFootage number.

For the clear model that weld seam is shown, band (8) also can be set on slide rule (4), its width is the thickness of tested mother metal, and slide sign (9), the xsect of its simulating shape weld seam also can be set on the band (8).

Below in conjunction with accompanying drawing the utility model is described in detail.

Fig. 1 is an outside drawing of the present utility model;

Fig. 2 is a vertical view of the present utility model;

Fig. 3 is K value oblique line figure of the present utility model.

In the drawings, (1) is blade, is made up of panel (5), position limit arm (2) and (3), lath (6) and (7).Slide rule (4) between panel (5) and lath (6) and (7) notch arranged, so that can horizontally slip.Panel (5) is provided with K value oblique line.Be carved with K footage number and X footage number on lath (6) and (7) respectively.The place is provided with coordinate system in the middle of slide rule (4) one side, and the both sides of another side are carved with C footage number and X respectively _FFootage number.Above-mentioned four kinds of footage numbers have satisfied the whole calculating needs in the defect location.

In the prior art, the formula that calculates scarce dangerous horizontal level is: L=Wsin β, and for the ease of practicality, the utility model is introduced the K value, and this formula is expressed as:

${\mathrm{X\; =\; C\; ·<figure-callout\; id="1"\; label="X\; F\; K"\; filenames="87214287\_DRIMG1.png"\; state="\{\{state\}\}">X</figure-callout>}}_F\frac{K}{}\frac{}{\sqrt{{\mathrm{1+K}}^2}}$

In the formula, the X-Probe index is to the horizontal range of defective, unit (mm).

The sound path size that each lattice is represented on the transverse axis of c-ultra-sonic defect detector screen, unit (mm/ lattice).

X _FThe reading of-flaw echo on transverse axis, unit (lattice).

The tangent value at K-angle probe refraction angle is provided by angle probe.

Defect location chi of the present utility model can utilize its four footage numbers (K, c, X _F, the X footage number) directly calculate above-mentioned formula ${\mathrm{X\; =\; C\; ·<figure-callout\; id="1"\; label="X\; F\; K"\; filenames="87214287\_DRIMG1.png"\; state="\{\{state\}\}">X</figure-callout>}}_F\frac{K}{}\frac{}{\sqrt{{\mathrm{1+K}}^2}}$ The result.

The K value of normally used angle probe is 0.8,1,1.5,2,2.5 5 kinds, thereby on panel (5), marked these five kinds of K value oblique lines as an example.

K footage number on the lath (6) carries out scale by following relation.Make function $\mathrm{Sin\; \beta \; =}\frac{\mathrm{<figure-callout\; id="1"\; label="K"\; filenames="87214287\_DRIMG1.png"\; state="\{\{state\}\}">K</figure-callout>}}{\sqrt{{\mathrm{1+K}}^2}}$ , then obtain K, $\frac{\mathrm{<figure-callout\; id="1"\; label="K"\; filenames="87214287\_DRIMG1.png"\; state="\{\{state\}\}">K</figure-callout>}}{\sqrt{{\mathrm{1+K}}^2}}$ With ${\mathrm{<figure-callout\; id="10"\; label="L\; g"\; filenames="87214287\_DRIMG1.png"\; state="\{\{state\}\}">L</figure-callout>}}_g\mathrm{10·}\frac{\mathrm{<figure-callout\; id="1"\; label="K"\; filenames="87214287\_DRIMG1.png"\; state="\{\{state\}\}">K</figure-callout>}}{\sqrt{{\mathrm{1+K}}^2}}$

The corresponding relation of these three amounts is listed as follows:

The number of the groove of K footage number is decided on actual needs, this example except that about the groove of two extreme positions, with 5 grooves.A groove of Far Left extreme position and a groove of rightmost extreme position should be respectively and X _FA rightmost groove of footage number, c footage number, x footage number and leftmost groove alignment.On the K footage number, it is pairing to press the K value $L_g$ ${\mathrm{10}}_{}\mathrm{10}\frac{\mathrm{<figure-callout\; id="1"\; label="K"\; filenames="87214287\_DRIMG1.png"\; state="\{\{state\}\}">K</figure-callout>}}{\sqrt{{\mathrm{1+K}}^2}}$ Numerical value decide length.For example, when K=2, L then _G1010 * 0.89=0.95.In other words, if K footage number total length is 100mm, then measure length 95mm to the right, and put on 2 symbol at this place from left end.Remaining K value labeling method is drawn analogous conclusions.

The X of this positioning rule _FThe scale method of footage number, c footage number, X footage number is identical with the scale method of general-purpose computations chi.

Above-mentioned each footage number can amplify or dwindle at equal pace, carries out groove then on positioning rule.

On two faces of vernier (10) groove is arranged respectively, a groove is used for calculating, and another groove is used for the horizontal level X value according to defective, searches buried depth.

Defect location chi of the present utility model is by panel (5), lath (6) and (7), slide rule (4), vernier (10), position limit arm (2) and (3) formation.Slide rule (4), panel (5) and vernier (10) are made with transparent material, for example organic glass, plastics etc.The most handy opaque material in lath (6) and (7) is made.Materials such as position limit arm (2) and (3) available plastics, bakelite, position limit arm is used to strengthen the strength and stiffness of blade (1), and the slip of vernier (10) is limited, and makes it not break away from blade.

K value oblique line on the panel (5) is scribed according to relational expression K=tg β, if use the angle probe with K value representation refraction angle β, then calculates the β value by the K value.β herein is the angle probe refraction angle that the UT (Ultrasonic Testing) staff is familiar with.If probe is not the K value representation, then can directly carry out groove with known β value.

Slide rule (4) is carved with c footage number and X _FWith band (8), its width is the thickness of tested mother metal, the slide sign (9) that can horizontally slip also can be set, the xsect of its simulating shape weld seam on the band (8) on the side of footage number.Light materials such as band (8) and the available paper slip of slide sign (9), plastics are made.Band (8) can be changed according to different mother metals at any time with slide sign (9).The position of band lower limb on slide rule (4) determined according to the following rules: if the K value of probe is 2.5, then the lower limb of band (8) drops on indicating on two oblique line intersection points of 2.5 of panel (5); If the K value of probe is 0.8(or 1,1.5,2), then drop on the corresponding oblique line intersection point.

During use, the intersection point of the coordinate system left margin of the coboundary of band (8) and slide rule (4) is the angle probe incidence point.The axis of a weld that the center line of slide sign (9) to the distance of above-mentioned incidence point obtains for actual measurement is to the distance of angle probe incidence point.Like this, can in horizontal level that records defective and buried depth, observe the concrete position that this defective is in weld seam intuitively.

Use the method for this defect location yardstick amount defect level position to be:

Twitch slide rule (4) and make X _FOne end of footage number is aimed at the K value on the K footage number.X in slide rule (4) _FFind the X that on screen, has recorded on the footage number _FValue, moving cursor (10) makes its groove and X then _FX on the footage number _FValue overlaps, and then twitches slide rule (4), and an end of c footage number is overlapped with the groove of vernier (10), finds known c value on the c footage number, at this moment finds the X value corresponding with C on the X footage number.

The measuring method of defective buried depth is, twitches slide rule (4), by the size of known K value incidence point dropped on the K value oblique line of the left side, measures known X value (slide rule has little lattice on (4)) to the right from incidence point then, and locatees with the vertical line of vernier (10).The vertical line of vernier this moment (10) intersects at a point with corresponding K value oblique line, and this intersection point to the distance of band (8) coboundary is the defective depth of burial of being asked.

The utility model is simple in structure, is easy to use.UT (Ultrasonic Testing) staff utilizes the utility model can be at short notice the position of defective to be compared accurately and measures, thereby can promote the UT (Ultrasonic Testing) technology and obtain to use widely.

Claims (2)

1, a kind of ultrasonic flaw detection positioning rule, constitute by blade, slide rule and vernier, it is characterized in that, described blade [1] is made up of panel [5], position limit arm [2] and [3] and lath [6] and [7], between panel [5] and lath [6] and [7] notch is arranged, so that slide rule [4] can horizontally slip, be carved with K value oblique line on the outside surface of panel [5], be carved with K footage number and X footage number on lath [6] and [7] respectively, the place is provided with coordinate system in the middle of the one side of slide rule [4], and the both sides of slide rule [4] another side are carved with C footage number and X respectively _FFootage number, above-mentioned K footage number be by $L_{\mathrm{g\; 10}}\mathrm{10·}\frac{K}{\sqrt{{\mathrm{1+K}}^2}}$ Formula scribe, K value oblique line is to scribe according to the formula of K=tg β.

2, defect location chi according to claim 1 is characterized in that, slide rule (4) is provided with band (8), and its width is the thickness of mother metal, and band (8) is provided with slide sign (9), the xsect of its simulating shape weld seam.

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