CN201277845Y - Gauge for measuring pipe end blunted edge length of steel pipes - Google Patents

Abstract

The utility model relates to a measuring tool for measuring the length of a truncated edge at the tube end of a steel tube, which is used for measuring the length of the truncated edge at the tube end of the steel tube. The measuring tool is characterized in that a main scale comprises a main body and a protrusive suspension arm, wherein the main body takes the shape of a sector, the protrusive suspension arm is arranged at the sector side of the main body, scale marks are arranged on the sector surface of the main body, a circular hole is arranged on the main body, and a riveting shaft passes through the circular hole; the zero point of the scale marks, the circle center of the circular hole and the upper plane of the protrusive suspension arm are positioned in the same plane; the main scale is connected with an auxiliary scale through the riveting shaft; the auxiliary scale comprises an auxiliary scale pole and a rear-extension suspension arm, a circular hole is arranged in the middle of the auxiliary scale pole and the rear-extension suspension arm, and a riveting shaft passes through the circular hole; and the upper plane of the auxiliary scale pole, the lower surface of the rear-extension suspension arm and the circle center of the circular hole are positioned in the same plane. The utility model can accurately measure the length of the truncated edge at the tube end of the steel tube according to related standard requirements, has simple structure, convenient operation and strong practicality, can simplify measuring procedures and saves the measuring time.

Description

Measure the measurer of the pipe end root face length of steel pipe

Technical field

The utility model relates to a kind of dimensional measuring instrument, the particularly a kind of special measuring tool that can accurately measure the pipe end root face length of steel pipe.Be suitable for delivery pipe pipe end root face measurement of lengths such as oil, gas and ore pulp, also can in the root face measurement of length, promote the use of.

Background technology

At the two ends of steel pipe, often need to be processed into the chamfering form.Behind the chamfering, the steel pipe minimum thickness that steel tube end part remained needs to measure.Measuring the measurer that adopts at present is common ruler or vernier caliper.

When adopting common ruler to measure, root face is close on ruler scale limit, and direct reading.But because the scale division value of common ruler is 1mm, and relevant criterion requires pipe end root face measurement of length need be accurate to 0.1mm, therefore the measuring accuracy deficiency of common ruler.

When adopting common calliper to measure, hold slide calliper rule, two claws of slide calliper rule are ridden over the upper and lower edge of root face respectively, thereby carry out reading.But because the upper edge of pipe end root face is on a slope, so the claw of common calliper can not ride over the place, upper edge of root face exactly, thereby causes the measuring accuracy of common calliper not meet the demands.

No matter adopting common ruler in a word still is that common calliper is measured pipe end root face length, and present measuring accuracy all can not meet the demands.

The utility model content

The purpose of this utility model is: a kind of measurer of measuring the pipe end root face length of steel pipe is provided, and this special measuring tool can accurately be measured tested pipe end root face length by related standard requirements.Overcome the problem of common ruler or vernier caliper precision deficiency when measuring root face length.

The technical solution adopted in the utility model is: measure the measurer of the pipe end root face length of steel pipe, be made up of main scale, secondary chi and riveted joint axle.Main scale comprises main body and the cantilever that protracts, and being shaped as of main body is fan-shaped, on the scallop of main body the cantilever that protracts is arranged, and the last plane of this cantilever that protracts is vertical mutually with the scallop of place main body.On the main body sector scale mark is arranged, scale mark is vertical perpendicular to plane on the cantilever that protracts.On main body, there is one for a riveted joint circular hole that passes.The last plane of the zero point of scale mark, the center of circle of circular hole and the cantilever that protracts is in same plane.The center of circle of this circular hole is this circular hole center of circle 10 times to the distance of the cantilever initial surface that protracts to the distance of scale mark.Main scale connects with secondary chi by the riveted joint axle.Secondary chi comprise secondary chi bar and after stretch cantilever, secondary chi bar and after to stretch cantilever be one, secondary chi bar and after stretch a circular hole that has in the middle of the cantilever one to pass for the riveted joint axle.The last plane of secondary chi bar and after stretch the center of circle of the lower surface of cantilever and circular hole in same plane.

During measurement, the pipe end root face of steel pipe is close to the initial surface of the cantilever that protracts, and the steel pipe inwall is close to the last plane of the cantilever that protracts; The revolute pair chi, after stretch cantilever lower plane lean against on the pipe end chamfering summit.Like this, forming a pair of between main scale, the secondary chi is 10 similar triangles for the ratio of similitude to angular vertex with the riveted joint circular hole center of circle.Utilize the ratio of similitude of similar triangles to equal the principle of its each corresponding sides length ratio, the root face length that records is amplified, thereby realize direct survey measurements.

The beneficial effects of the utility model are that the measurer of the pipe end root face length of measurement steel pipe can be measured pipe end root face length exactly according to the relevant criterion requirement, and simple in structure, easy to operate, practical, energy simplified measurement step, saving Measuring Time.

Description of drawings

Fig. 1 is the structure assembling synoptic diagram of the measurer of the utility model pipe end root face length of measuring steel pipe, also is the synoptic diagram of measuring pipe end root face length.

Fig. 2 is a schematic diagram of the present utility model.

Among the figure, stretch cantilever after 1., 2. pipe end, the cantilever that 3. protracts, 4. riveted joint axle, 5. main body, 6. secondary chi body.

Embodiment

Further illustrate the utility model below in conjunction with example, but example does not limit protection scope of the present invention.

Embodiment 1:

Consult Fig. 1.Measure the measurer of the pipe end root face length of steel pipe, form by main scale, secondary chi and riveted joint axle 4.Main scale comprises the main body 5 and the cantilever 3 that protracts, and the thickness of the main body 5 and the cantilever 3 that protracts is 2 millimeters, and being shaped as of main body 5 is fan-shaped.The cantilever 3 that protracts is arranged on the scallop of main body 5, and the last plane of this cantilever 3 that protracts is vertical mutually with the scallop of place main body 5.On main body 5 sectors scale mark is arranged, scale mark is vertical perpendicular to plane on the cantilever 3 that protracts.On main body 5, there is one for riveted joint axle 4 circular holes that pass.The last plane of the zero point of scale mark, the center of circle of circular hole and the cantilever 3 that protracts is in same plane.The center of circle of this circular hole is this circular hole center of circle 10 times to the distance of cantilever 3 initial surfaces that protract to the distance of scale mark.

Main scale connects with secondary chi by riveted joint axle 4.

Secondary chi comprise secondary chi bar 6 and after stretch cantilever 1, secondary chi bar 6 and after stretch cantilever 1 and be one, secondary chi bar 6 and after stretch cantilever 1 thickness be 2 millimeters.Secondary chi bar 6 and after have one for riveted joint axle 4 circular holes that pass in the middle of stretching cantilever 1, the last plane of secondary chi bar 6 and after stretch the center of circle of the lower surface of cantilever 1 and circular hole in same plane.

In order to improve measuring accuracy, the width on the last plane of the described cantilever 3 that protracts can be 0.5 millimeter or littler.

The measuring principle of this measurer: consult Fig. 2.At first make cantilever 3 upper surfaces and cantilever 3 initial surfaces of main scale be close to tested pipe end inside surface and root face face respectively.Then the revolute chi 1, makes secondary chi 1 ride over place, root face upper edge.So far, with rotation center O point for angular vertex is formed a diabolo △ OA ₁B ₁With △ OA ₂B ₂

The O point is the rotary middle point of secondary chi 1 around main scale, A ₁Point is the lower edge point of the root face of surveying, B ₁Point is the upper edge point of the root face of surveying, A ₂Point is the zero point on the scale mark, B ₂Point is that the measured value on the scale mark indicates point.That need measurement is A ₁With B ₁Between distance.Obviously according to assembling and measuring operation requirement, A ₁Point, O point and A ₂Put on same straight line B ₁Point, O point and B ₂Point is on same straight line, and B ₁A ₁⊥ A ₁A ₂, B ₂A ₂⊥ A ₁A ₂, so Rt △ OA ₁B ₁≌ Rt △ OA ₂B ₂

Because Rt △ OA1B1 ≌ Rt △ is OA2B2, so $\frac{{\mathrm{<figure-callout\; id="1"\; label="OA"\; filenames="Y20082012308300071.png"\; state="\{\{state\}\}">OA</figure-callout>}}_1}{{\mathrm{<figure-callout\; id="2"\; label="OA"\; filenames="Y20082012308300071.png,Y20082012308300081.png"\; state="\{\{state\}\}">OA</figure-callout>}}_2}=\frac{A_1{B}_1}{A_2{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="Y20082012308300071.png,Y20082012308300081.png"\; state="\{\{state\}\}">B</figure-callout>}}_2},$ $A_1{\mathrm{<figure-callout\; id="1"\; label="B"\; filenames="Y20082012308300071.png"\; state="\{\{state\}\}">B</figure-callout>}}_1=\frac{{\mathrm{<figure-callout\; id="1"\; label="OA"\; filenames="Y20082012308300071.png"\; state="\{\{state\}\}">OA</figure-callout>}}_1}{{\mathrm{<figure-callout\; id="2"\; label="OA"\; filenames="Y20082012308300071.png,Y20082012308300081.png"\; state="\{\{state\}\}">OA</figure-callout>}}_2}\&times;A_2{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="Y20082012308300071.png,Y20082012308300081.png"\; state="\{\{state\}\}">B</figure-callout>}}_2.$ By as can be known aforementioned, $\frac{{O\mathrm{<figure-callout\; id="1"\; label="A"\; filenames="Y20082012308300071.png"\; state="\{\{state\}\}">A</figure-callout>}}_1}{{\mathrm{<figure-callout\; id="2"\; label="OA"\; filenames="Y20082012308300071.png,Y20082012308300081.png"\; state="\{\{state\}\}">OA</figure-callout>}}_2}\&equiv;0.1.$ So root face length of surveying $A_1{\mathrm{<figure-callout\; id="1"\; label="B"\; filenames="Y20082012308300071.png"\; state="\{\{state\}\}">B</figure-callout>}}_1=\frac{{\mathrm{<figure-callout\; id="1"\; label="OA"\; filenames="Y20082012308300071.png"\; state="\{\{state\}\}">OA</figure-callout>}}_1}{{\mathrm{<figure-callout\; id="2"\; label="OA"\; filenames="Y20082012308300071.png,Y20082012308300081.png"\; state="\{\{state\}\}">OA</figure-callout>}}_2}\&times;A_2{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="Y20082012308300071.png,Y20082012308300081.png"\; state="\{\{state\}\}">B</figure-callout>}}_2=\frac{A_2{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="Y20082012308300071.png,Y20082012308300081.png"\; state="\{\{state\}\}">B</figure-callout>}}_2}{10}.$

In view of the above, scale value shown on the main scale scale mark is denoted as 0.1 times of its actual value, thereby directly to survey root face A ₁B ₁Length is carried out reading.

Claims (2)

1, a kind of measurer of measuring the pipe end root face length of steel pipe, by main scale, secondary chi and riveted joint axle (4) are formed, it is characterized in that: main scale comprises main body (5) and the cantilever that protracts (3), being shaped as of main body (5) is fan-shaped, on the scallop of main body (5) cantilever that protracts (3) is arranged, the last plane of this cantilever that protracts (3) is vertical mutually with the scallop of place main body (5), on main body (5) sector scale mark is arranged, upward the plane is vertical perpendicular to the cantilever that protracts (3) for scale mark, on main body (5), there is one for riveting the circular hole that axle (4) passes, the zero point of scale mark, the center of circle of circular hole and protract the last plane of cantilever (3) in same plane, the center of circle of this circular hole is this circular hole center of circle to 10 times of the distance of the cantilever that protracts (3) initial surface to the distance of scale mark;

Main scale connects with secondary chi by riveted joint axle (4);

Secondary chi comprise secondary chi bar (6) and after stretch cantilever (1), secondary chi bar (6) and after to stretch cantilever (1) be one, secondary chi bar (6) and after stretch the circular hole that has in the middle of the cantilever (1) to pass for riveted joint axle (4), the last plane of secondary chi bar (6) and after stretch the center of circle of the lower surface of cantilever (1) and circular hole in same plane.

2, the measurer of the pipe end root face length of measurement steel pipe as claimed in claim 1, it is characterized in that: the width on the last plane of the described cantilever that protracts (3) is 0.5 millimeter.

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