CN110966910A - High-precision measuring tool and method for angle of pipeline elbow - Google Patents

High-precision measuring tool and method for angle of pipeline elbow Download PDF

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Publication number
CN110966910A
CN110966910A CN201911307760.6A CN201911307760A CN110966910A CN 110966910 A CN110966910 A CN 110966910A CN 201911307760 A CN201911307760 A CN 201911307760A CN 110966910 A CN110966910 A CN 110966910A
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China
Prior art keywords
angle
measuring
measuring rod
rod
scale
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CN201911307760.6A
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CN110966910B (en
Inventor
黄小波
蒋思阳
付勇
李长宁
阙家嘉
郑泽
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China General Nuclear Power Corp
CGN Power Co Ltd
Suzhou Nuclear Power Research Institute Co Ltd
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China General Nuclear Power Corp
CGN Power Co Ltd
Suzhou Nuclear Power Research Institute Co Ltd
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Priority to CN201911307760.6A priority Critical patent/CN110966910B/en
Publication of CN110966910A publication Critical patent/CN110966910A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical means
    • G01B5/24Measuring arrangements characterised by the use of mechanical means for measuring angles or tapers; for testing the alignment of axes

Abstract

The invention discloses a high-precision measuring tool and a measuring method for the angle of a pipeline elbow, which comprises a first measuring rod piece and a second measuring rod piece which are rotationally connected with each other, wherein the end parts, far away from a connecting part, of the first measuring rod piece and the second measuring rod piece are respectively provided with a third measuring rod piece; one end of the first measuring rod piece is provided with a first angle main scale, the other end of the first measuring rod piece is provided with a first vernier scale, one end of the second measuring rod piece is provided with a second vernier scale, and the other end of the second measuring rod piece is provided with a third vernier scale so as to measure an included angle between the first measuring rod piece and the second measuring rod piece; and each third measuring rod piece is sleeved with a positioning piece, and the positioning pieces are rotatably connected with the third measuring rod pieces so as to measure the rotating angle of the positioning pieces around the third measuring rod pieces. The measuring tool provided by the invention realizes accurate positioning measurement of any direction of the outer surface of the pipeline, meets the requirements of complex environments and greatly improves the measurement accuracy.

Description

High-precision measuring tool and method for angle of pipeline elbow
Technical Field
The invention relates to the field of angle measurement of a pipeline elbow, in particular to a high-precision angle measurement tool and a measurement method for the pipeline elbow.
Background
The industrial pipeline is widely applied to the fields of electric power, chemical industry, energy and the like, the pipeline elbow is a special part in a pipeline system, the elbow is connected with the straight pipe section to play a role in changing the trend of the pipeline and form a pipe network with a space structure, and therefore the function of transmitting media to different directions and different positions is achieved. Meanwhile, the pipeline elbow is also the weakest link in the structural strength of the pipeline system. Under the combined action of internal and external loads, especially under the transient load impact working conditions of water hammer, air hammer and the like, the elbow is more prone to deformation and damage than a straight pipe section. The pipe is relatively special compared to other structures and has no definite edges and corners, which makes it difficult to measure the angle of the elbow (i.e. the angle between the axes of two straight pipe sections connected by the elbow).
The elbow is a link with weak structural strength in a pipeline system, and is easy to deform under the long-term action of internal and external loads and the action of some transient impact loads. For the running pipeline system, when the individual elbow deforms, the operation of the elbow is not required to be stopped immediately in order to avoid huge economic loss, and the deformation of the elbow is required to be accurately measured and analyzed, so that the safety margin of the deformed elbow is quantitatively evaluated.
The accurate measurement of the angle of the elbow of the in-service pipeline has the following difficulties: (1) the central axes of the front and rear straight pipe sections of the pipe elbow, i.e., the angle between the central axes of the front and rear straight pipe sections of the elbow, cannot be precisely positioned. However, because the pipe has no definite edge, the central axis is positioned in the pipe and is a virtual straight line, how to accurately position the direction of the central axis of the pipe on the outer surface of the pipe and ensure that the measured angle is the angle between the central axes of the pipe is a difficult point which must be solved for accurately measuring the angle of the elbow; (2) all the invention are only suitable for measuring in a certain specific position on the pipeline, can not meet the measurement requirement of complex environment on the spot, the pipeline of the electric power and chemical industry, because the factory building is relatively small, the pipeline, equipment and other structures in the factory building are arranged closely, the existing elbow angle measuring method or tool can only measure from a certain specific position of the outer surface of the pipeline at present, and the method or tool can not be implemented and applied on the spot because of the obstruction of other pipelines, equipment and other structures on the spot; (3) the precision of angle measurement is not high, and in engineering, the angle of the pipe elbow is often measured roughly by taking the degree as the minimum unit, but if the deformation of the angle of the elbow needs to be measured, the precision is too low by taking the degree as the unit, and the tiny deformation of the angle of the elbow cannot be captured.
Through comprehensive retrieval, the invention and related documents which can realize high-precision measurement of the angle of the elbow do not exist at present. A large number of pipeline elbow angle measuring tools can only be accurate to the degree, and the common problem that the central axis cannot be accurately positioned and the measurement can only be carried out in a single direction on the pipeline exists. For example, in patents CN201320141753 "elbow angle measuring instrument" and CN201621476355 "elbow measuring scale", two double rulers with one ends hinged and a protractor are used to form a measuring tool of an elbow, the measuring device of the elbow angle in this structural form is limited to perform measurement on the outer side surface of the elbow, and the measurement is performed by contacting the outer side surface of the straight pipe section connected with the elbow with the intersection line of the surface where the elbow centerline is located. The scheme is only limited to the measurement of the outer side surface of the pipeline, the central axis of the straight pipe section cannot be accurately positioned, and meanwhile, the measurement precision is not enough.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a high-precision measuring tool and a measuring method for the angle of a pipeline elbow, which are used for improving the detection precision and meeting the requirements of complex environments on site, and the technical scheme is as follows:
the invention provides a high-precision measuring tool for the angle of a pipeline elbow, which comprises a first measuring rod piece and a second measuring rod piece which are rotationally connected with each other, wherein the end parts of the first measuring rod piece and the second measuring rod piece, which are far away from a connecting part, are respectively provided with a third measuring rod piece; one end of the first measuring rod piece is provided with a first angle main scale, the other end of the first measuring rod piece is provided with a first vernier scale, one end of the second measuring rod piece is provided with a second vernier scale, the other end of the second measuring rod piece is provided with a third vernier scale, and the first angle main scale is matched with the second vernier scale so as to be used for measuring an included angle between the axis of the first measuring rod piece and the axis of the second measuring rod piece;
each third measuring rod piece is provided with a second angle main ruler, and the second angle main ruler is matched with the first vernier on the first measuring rod piece positioned on the same side so as to be used for measuring an included angle between the axis of the first measuring rod piece and the axis of the corresponding third measuring rod piece; the second angle main ruler is matched with the third vernier on the second measuring rod piece positioned on the same side so as to be used for measuring an included angle between the axis of the second measuring rod piece and the axis of the corresponding third measuring rod piece;
every third is measured the pole and is overlapped and be equipped with two at least and pipeline complex setting elements that await measuring, the setting element with the third is measured the pole and is rotated mutually and be connected, be provided with fourth angle main scale on the setting element, the third is measured and is provided with the fourth vernier scale with fourth angle main scale assorted on the pole, in order to be used for measuring the rotation angle of setting element around the third measurement pole axis.
Furthermore, the positioning piece comprises a positioning body, a first through hole matched with the third measuring rod piece is formed in the positioning body, both end faces of the first through hole are provided with fourth angle main rulers with scale marks, and the center of the first through hole is coaxial with the axis of the third measuring rod piece; a second through hole is formed in the top of the positioning body, and the positioning piece is fixedly connected with the third measuring rod piece by installing a first fastener in the second through hole; the circle center line of the first through hole is perpendicular to the circle center line of the second through hole.
Further, the bottom of location body is equipped with the matching foot that is used for with the pipeline surface matching that awaits measuring, the both sides of matching foot are equipped with the location curved surface that a plurality of symmetries set up respectively, and the location curved surface one-to-one of both sides has the location edge between every two adjacent location curved surfaces that lie in same side, and the location edge one-to-one and parallel arrangement of both sides.
Furthermore, the third measuring rod piece is of a telescopic structure and comprises a first rod and a second rod connected with the first rod, the axis of the first rod and the axis of the second rod are positioned on the same straight line, at least one positioning piece is sleeved outside the first rod and the second rod, and fourth vernier scales matched with the fourth angle main ruler on the positioning pieces are arranged on the first rod and the second rod; the end part, far away from the second rod, of the first rod is provided with a third through hole matched with the first measuring rod piece or the second measuring rod piece, the end face of the third through hole is provided with a second angle main ruler, and the circle center line of the third through hole is perpendicular to the axis of the third measuring rod piece.
Furthermore, the first measuring rod piece is of a telescopic structure and comprises a third rod and a fourth rod connected with the third rod, a fourth through hole is formed in the end part, far away from the fourth rod, of the third rod, and the upper end face of the fourth through hole is a first angle main scale with scale marks; the end part, far away from the third rod, of the fourth rod comprises a first connecting part and a second connecting part which are arranged oppositely up and down, a space for accommodating one end part of a third measuring rod piece positioned on the same side is formed between the first connecting part and the second connecting part, fifth through holes which are arranged oppositely are formed in the first connecting part and the second connecting part, the circular center line of each fifth through hole is perpendicular to the axis of the second rod, and first vernier scales with scale marks are arranged on the outer side surfaces of the circular arc structures of the first connecting part and the second connecting part; and fixedly connecting the first measuring rod with the third measuring rod positioned on the same side by installing a second fastener in the fifth through hole.
Furthermore, the second measuring rod piece is of a telescopic structure and comprises a fifth rod and a sixth rod connected with the fifth rod, a sixth through hole is formed in the end part, far away from the sixth rod, of the fifth rod, and a second vernier with scale marks is arranged on the upper end face of the sixth through hole; the end part, far away from the fifth rod, of the sixth rod comprises a third connecting part and a fourth connecting part which are arranged oppositely up and down, a space for accommodating one end part of a third measuring rod piece positioned on the same side is formed between the third connecting part and the fourth connecting part, seventh through holes which are arranged oppositely are formed in the third connecting part and the fourth connecting part, the circle center line of each seventh through hole is perpendicular to the axis of the sixth rod, and third vernier scales with scale marks are arranged on the side surfaces of the two seventh through holes; and fixedly connecting the second measuring rod with the third measuring rod positioned on the same side by installing a second fastener in the seventh through hole.
Furthermore, the extending direction of the scale marks on the first angle main scale is parallel to the extending direction of the scale marks on the second vernier scale, the scale marks on the second angle main scale are perpendicular to the scale marks on the first vernier scale or the third vernier scale, and the scale marks on the fourth angle main scale are perpendicular to the scale marks on the fourth vernier scale.
Further, the first fastening piece is a first stud and a fixing piece, the second through hole is a threaded hole with internal threads, the fixing piece is arranged at the upper portion in the second through hole to be in contact with the third measuring rod piece, and the first stud is arranged at the upper portion in the second through hole to be in contact with the fixing piece.
The invention also provides a measuring method of the pipeline elbow angle high-precision measuring tool, which comprises an outside measuring method, wherein the outside measuring method comprises the following steps:
s1, placing the high-precision measuring tool for the angle of the elbow of the pipeline on the pipeline to be detected, firstly adjusting the angle of the positioning piece relative to the corresponding third measuring rod piece to ensure that the angle values of the positioning pieces are equal, wherein the included angle between the first measuring rod piece and the corresponding third measuring rod piece is 180 degrees, and the included angle between the second measuring rod piece and the third measuring rod piece positioned on the same side is 180 degrees;
and S2, reading an included angle between the first measuring rod piece and the second measuring rod piece, wherein the included angle is the angle of the pipeline elbow to be detected.
The invention also provides a measuring method of the high-precision measuring tool for the angle of the pipe elbow, which comprises an inside measuring method, wherein the inside measuring method comprises the following steps:
s1, placing the high-precision measuring tool for the angle of the elbow of the pipeline on the pipeline to be detected, and adjusting the angle of the positioning piece relative to the corresponding third measuring rod piece to enable the angle values of the positioning pieces to be equal;
s2, after adjusting an included angle between the first measuring rod and the third measuring rod located on the same side and an included angle between the second measuring rod and the third measuring rod located on the same side, calculating the angle of the pipe bend to be detected by the following formula:
β3=180°-β4
α=360°-β123
α is an angle of a bend to be detected, β 1 is an included angle between the first measuring rod and the third measuring rod located on the same side, β 2 is an included angle between the second measuring rod and the third measuring rod located on the same side, β 4 is an included angle between the first measuring rod and the second measuring rod, and β 3 is a supplementary angle of β 4.
The technical scheme provided by the invention has the following beneficial effects:
a. the high-precision measuring tool for the angle of the pipeline elbow, which is designed by the invention, realizes the high-precision measurement of the angle of the pipeline elbow, and can guide the precision processing of the required elbow by measuring the angles of the front and rear straight pipe sections of the elbow aiming at a pipeline system in the installation process; aiming at an installed or in-service pipeline system, the small change of the angle of the elbow in the pipeline system can be captured through the high-precision measurement of the angle of the elbow, so that the safety of the pipeline elbow and even the whole pipeline system can be quantitatively evaluated;
b. the precise positioning of the axis of the straight pipe section is realized by adopting multipoint matching; the accurate positioning and measurement in each radial direction of the pipeline are realized, the field applicability is greatly improved, and the field complex environment requirements are met;
c. all relative displacement (angular displacement) and measurement are in a vernier form, the precision of a measurement result is improved from 1 degree to 0.05 degree, and the measurement of the tiny variation of the angle of the elbow is realized;
d. through the length adjustment of the measuring rod piece and the adjustment of the angle of the matching foot, the straight pipe section can be matched at any position, adverse factors on a pipeline can be effectively avoided, the applicability of the tool is improved, and the measuring precision is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a perspective view of a tool for measuring the angle of a pipe bend with high precision according to an embodiment of the present invention;
FIG. 2 is a perspective view of a positioning member of a tool for measuring the angle of a pipe bend with high precision according to an embodiment of the present invention;
FIG. 3 is a perspective view of a first fastener of a tool for high precision measurement of the angle of a pipe bend according to an embodiment of the present invention;
FIG. 4 is a side view of a matching leg of a positioning member of a tool for highly accurately measuring the angle of a pipe bend according to an embodiment of the present invention;
FIG. 5 is a perspective view of a third measurement bar of the tool for measuring the angle of a pipe bend with high precision according to the embodiment of the present invention;
fig. 6 is a perspective view of a third measuring rod and a positioning member of the tool for measuring the angle of a pipe bend with high precision according to the embodiment of the present invention;
FIG. 7 is a perspective view of a first measurement bar of the tool for measuring the angle of a pipe bend with high precision according to the embodiment of the present invention;
FIG. 8 is a perspective view of a second measurement bar of the tool for measuring the angle of a pipe bend with high precision according to the embodiment of the present invention;
fig. 9 is a perspective view of a first measuring rod and a second measuring rod of the tool for measuring the angle of a pipe bend with high precision according to the embodiment of the present invention;
FIG. 10 is a perspective view of a second fastener of a tool for high precision measurement of the angle of a pipe bend provided by an embodiment of the present invention;
fig. 11 is a perspective view of the first measuring rod and the third measuring rod of the tool for measuring the angle of the elbow of the pipeline with high precision according to the embodiment of the present invention;
FIG. 12 is a side view of a first condition for a pipe being measured by a pipe bend angle high accuracy measurement tool provided in accordance with an embodiment of the present invention;
fig. 13 is a reading chart of a fourth angle main scale and a fourth vernier scale in a first case of measuring a pipeline by using the high-precision measuring tool for the angle of the elbow of the pipeline provided by the embodiment of the invention;
FIG. 14 is a side view of a second condition for a pipe being measured by a pipe bend angle high precision measurement tool provided in accordance with an embodiment of the present invention;
fig. 15 is a reading chart of a fourth angle main scale and a fourth vernier scale in a second case of measuring a pipeline by using the high-precision measuring tool for the angle of the elbow of the pipeline provided by the embodiment of the invention;
FIG. 16 is a side view of a third aspect of a pipe bend angle high accuracy measurement tool of the present invention for measuring a pipe;
fig. 17 is a reading chart of a fourth angle main scale and a fourth vernier scale in a third case of measuring a pipeline by using the high-precision measuring tool for the angle of the elbow of the pipeline provided by the embodiment of the invention;
FIG. 18 is a perspective view of an outside measurement of a pipe being measured by a pipe bend angle high precision measurement tool provided in accordance with an embodiment of the present invention;
FIG. 19 is a reading of a first main angle scale and a second vernier for outside measurement of a pipe with a high precision measuring tool for pipe bend angle provided by an embodiment of the present invention;
FIG. 20 is a perspective view of an inside measurement of a pipe being measured by a pipe bend angle high precision measurement tool provided in accordance with an embodiment of the present invention;
fig. 21 is a reading chart of an included angle between a second measuring rod and a third measuring rod for measuring the outer side of the pipeline by the high-precision measuring tool for the angle of the elbow of the pipeline provided by the embodiment of the invention;
fig. 22 is a reading chart of an included angle between the first measuring rod and the third measuring rod for measuring the outer side of the pipeline by the high-precision measuring tool for the angle of the elbow of the pipeline provided by the embodiment of the invention;
fig. 23 is a reading chart of an included angle between a first measuring rod and a second measuring rod for measuring the outer side of a pipeline by using the high-precision measuring tool for the angle of the elbow of the pipeline provided by the embodiment of the invention;
fig. 24 is an overall perspective view of a tool for measuring the angle of a pipe bend with high precision according to an embodiment of the present invention.
Wherein the reference numerals include: 1-a first measuring rod, 11-a first angle scale, 12-a first vernier scale, 13-a third rod, 14-a fourth rod, 15-a fourth through hole, 16-a fifth through hole, 18-a first connection, 19-a second connection, 2-a second measuring rod, 21-a second vernier scale, 22-a third vernier scale, 23-a fifth rod, 24-a sixth rod, 25-a sixth through hole, 27-a seventh through hole, 28-a third connection, 29-a fourth connection, 3-a third measuring rod, 31-a second angle scale, 33-a fourth vernier scale, 34-a first rod, 35-a third through hole, 36-a second rod, 4-a positioning element, 41-a fourth angle scale, 42-a first through hole, 43-a second through hole, 44-matching feet, 5-first fasteners, 51-first studs, 52-fixing parts, 6-second fasteners, 7-first positioning parts, 8-second positioning parts, 9-third positioning parts, 10-fourth positioning parts and 17-pipelines to be tested.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The minimum unit of the angle main ruler in the high-precision measuring tool for the angle of the pipeline elbow is 1 degree; the vernier is divided into 20 parts at 19 degrees.
In an embodiment of the present invention, a high-precision measurement tool for a pipe bend angle is provided, see fig. 1 and fig. 24, and includes a first measurement rod 1 and a second measurement rod 2 that are rotatably connected, wherein ends of the first measurement rod 1 and the second measurement rod 2, which are far away from a connection portion, are respectively provided with a third measurement rod 3, the first measurement rod 1 is rotatably connected with the third measurement rod 3 located on the same side, the second measurement rod 2 is rotatably connected with the third measurement rod 3 located on the same side, and two third measurement rods 3 are provided.
The one end of first measurement member 1 is provided with first angle main scale 11, and the other end is provided with first vernier scale 12, the one end that the member 2 was measured to the second is provided with second vernier scale 21, and the other end is provided with third vernier scale 22, first angle main scale 11 and second vernier scale 21 phase-match are used for measuring the contained angle between the first measurement member 1 axis and the second measurement member 2 axis. Each third measuring rod 3 is provided with a second main angle ruler 31, and the second main angle ruler 31 is matched with the first vernier ruler 12 on the first measuring rod 1 positioned on the same side so as to be used for measuring an included angle between the axis of the first measuring rod 1 and the axis of the corresponding third measuring rod 3; the second main angle ruler 31 is matched with the third vernier 22 on the second measuring rod 2 on the same side, so as to measure the included angle between the axis of the second measuring rod 2 and the axis of the corresponding third measuring rod 3.
The first measuring rod 1 has the following specific structure: referring to fig. 7, the first measuring rod 1 is of a telescopic structure, the first measuring rod 1 includes a third rod 13 and a fourth rod 14 connected to the third rod 13, the third rod 13 includes a bending portion and a straight tube portion, an axis of the straight tube portion of the third rod 13 and an axis of the fourth rod 14 are located on the same straight line, and the telescopic concrete form is that a guide groove matched with the third rod 13 is provided in the fourth rod 14, so that the third rod 13 can move along the guide groove of the fourth rod 14.
The end part, far away from the fourth rod 14, of the third rod 13 is of a cylindrical structure, a fourth through hole 15 is formed in the cylindrical structure, the circular center line of the fourth through hole 15 is perpendicular to the axis of the first measuring rod piece 1, the upper end plane and the lower end plane of the cylindrical structure are both first angle main scales 11 with scale marks, the scale marks on the first angle main scales 11 are in the horizontal direction, the first angle main scales 11 are matched with second vernier scales 21 on the second measuring rod pieces 2, and the extending directions of the scale marks on the second vernier scales 21 are parallel to the extending directions of the scale marks on the first angle main scales 11.
The end part of the fourth rod 14 far away from the third rod 13 comprises a first connecting part 18 and a second connecting part 19 which are arranged oppositely up and down, a space for accommodating one end part of the third measuring rod 3 positioned on the same side is arranged between the first connecting part 18 and the second connecting part 19, fifth through holes 16 which are arranged oppositely are formed in the first connecting part 18 and the second connecting part 19, the fifth through holes 16 extend along the up-down direction, namely the Y-axis direction, and the circular center line of the fifth through holes 16 is perpendicular to the axis of the second rod 36. All be provided with the first vernier scale 12 that has the scale mark on the circular arc structure lateral surface of first connecting portion 18 and second connecting portion 19, the scale mark on the first vernier scale 12 is vertical direction, first vernier scale 12 and the second angle main scale 31 phase-match that lies in measuring on the member 3 with the third of same side, the scale mark level on the second angle main scale 31 sets up, scale mark on the first vernier scale 12 sets up with the scale mark on the second angle main scale 31 is perpendicular, through reading first measurement member 1 first vernier scale 12 with in same side the angle numerical value of second angle main scale 31 on the member 3 is measured to the third, can learn contained angle between first measurement member 1 axis and the third measurement member 3 axis.
The first measuring rod member 1 and the third measuring rod member 3 are fixedly connected by installing a second fastening member 6 in the fifth through hole 16, the second fastening member 6 is a nut 61 and a bolt 62 which are matched, and the first measuring rod member and the third measuring rod member 3 which is positioned on the same side are ensured to have no relative rotation during the measuring process by tightening the nut and locking, see fig. 10.
The second measuring rod 2 has the following specific structure: referring to fig. 8, the second measuring rod 2 is a telescopic structure, the second measuring rod 2 includes a fifth rod 23 and a sixth rod 24 connected to the fifth rod 23, the fifth rod 23 includes a bent section and a straight section, an axis of the straight section of the fifth rod 23 and an axis of the sixth rod 24 are located on the same straight line, and in a telescopic specific form, a guide groove matched with the fifth rod 23 is provided in the sixth rod 24, so that the fifth rod 23 can move along the guide groove of the sixth rod 24.
The tip that sixth pole 24 was kept away from to fifth pole 23 is provided with the sixth connecting portion, be provided with sixth through-hole 25 on the sixth connecting portion, after first measurement member was connected with the second measurement member, the sixth through-hole 25 centre of a circle is coaxial with the 15 centre of a circle of fourth through-hole, the up end plane and the lower extreme plane of sixth connecting portion are the second vernier scale 21 that has the scale mark, the scale mark on the second vernier scale 21 is the horizontal direction, second vernier scale 21 and first angle main scale 11 phase-match, the scale mark on the second vernier scale 21 all extends along the horizontal direction with the scale mark on the first angle main scale 11.
The first measuring rod 1 and the second measuring rod 2 are measured in the following manner: referring to fig. 9, the first measuring rod 1 and the second measuring rod 2 are tightly assembled by a nested pipe system, after the assembly is completed, the first measuring rod 1 and the second measuring rod 2 have the same rotating shaft and can freely rotate around the shaft, and the first angle ruler 11 on the first measuring rod 1 is matched with the second vernier 21 on the second measuring rod 2 to realize the measurement of the included angle between the axis of the first measuring rod 1 and the axis of the second measuring rod 2.
The end part, far away from the fifth rod 23, of the sixth rod 24 of the second measurement rod 2 comprises a third connecting part 28 and a fourth connecting part 29 which are arranged oppositely, referring to fig. 8, a space for accommodating one end part of the third measurement rod 3 positioned on the same side is arranged between the third connecting part 28 and the fourth connecting part 29, seventh through holes 27 which are arranged oppositely are formed in the third connecting part 28 and the fourth connecting part 29, the circle center line of the seventh through hole 27 is perpendicular to the axis of the sixth rod 24, third vernier scales 22 with scale marks are arranged on the outer side faces of the circular arc structures of the third connecting part 28 and the fourth connecting part 29, and the scale marks on the third vernier scales 22 extend in the vertical direction; third vernier scale 22 and the third that lies in same side measure the second angle main scale 31 phase-match on the member 3, the vertical setting of scale mark on the third vernier scale 22, a plurality of scale marks on the second angle main scale 31 promptly with scale mark on the third vernier scale 22 sets up perpendicularly, through reading on the second measurement member 2 third vernier scale 22 with lie in same side the angle value of the second angle main scale 31 on the member 3 is measured to the third, can learn the contained angle between member 3 axis is measured to the second measurement member 2 axis and third.
The second measuring rod piece is fixedly connected with the third measuring rod piece 3 by installing a second fastening piece 6 in the seventh through hole 27, the second fastening piece 6 is a nut and a bolt which are matched, and the second measuring rod piece is locked by screwing the nut, so that the second measuring rod piece and the third measuring rod piece 3 which is positioned on the same side do not rotate relatively in the measuring process.
The third measuring rod 3 has the following specific structure: referring to fig. 5, the third measuring rod 3 is a telescopic structure, the third measuring rod 3 includes a first rod 34 and a second rod 36 connected to the first rod 34, an axis of the first rod 34 and an axis of the second rod 36 are located on the same straight line, and in a telescopic specific form, a guide groove matched with the first rod 34 is provided in the second rod 36, so that the first rod 34 can move along the guide groove of the second rod 36.
The end part of the first rod 34 far away from the second rod 36 is provided with a third through hole 35 matched with the first measuring rod piece or the second measuring rod piece, namely, the end part of the first rod 34 far away from the second rod 36 is of a hollow cylindrical structure, and the upper end surface and the lower end surface of the cylindrical structure are both provided with second angle main scales 31. The circle center line of the third through hole 35 is perpendicular to the axis of the third measuring rod 3, the plurality of scale marks on the second angle main scale 31 are in the horizontal direction, the plurality of scale marks form a ring around the third through hole 35, a circle can be enclosed, and the circle center of the circle coincides with the circle center of the third through hole 35. The plurality of scale marks on the second goniometer 31 are arranged perpendicular to the scale marks on the third vernier 22 located on the same side, and the plurality of scale marks on the second goniometer 31 are arranged perpendicular to the scale marks on the first vernier located on the same side.
Each third measuring rod 3 is sleeved with at least two positioning parts 4 matched with the pipeline to be measured, referring to fig. 6, the positioning parts 4 are rotatably connected with the third measuring rods 3, and the positioning parts 4 can rotate 360 degrees around the central axis of the third measuring rods 3 connected with the positioning parts 4, so that the measurement can be carried out in any radial direction of the pipeline. A fourth angle main scale 41 is arranged on the positioning member 4, a fourth vernier scale 33 matched with the fourth angle main scale 41 is arranged on the third measuring rod member 3 and used for measuring the rotation angle of the positioning member 4 around the axis of the third measuring rod member 3, see fig. 11, wherein the positioning member and the third measuring rod member 3 are matched to complete the positioning in the central axis direction of the front and rear straight pipe sections of the elbow.
The specific structure of the positioning member 4 is as follows: referring to fig. 2 and 4, the positioning element 4 includes a positioning body, a first through hole 42 matched with the third measuring rod 3 is arranged on the positioning body, an end of the positioning element 4 is of a cylindrical structure, two end faces of the first through hole 42 (i.e., left and right side faces of the cylindrical structure, both the two side faces are of a circular structure) are fourth angle main rulers 41 with scale marks, a circle center of the first through hole 42 is coaxial with an axis of the third measuring rod 3, the scale marks on the fourth angle main rulers 41 are on a vertical plane, i.e., perpendicular to a horizontal plane, and the scale marks form a ring shape, i.e., a circle can be enclosed, and a circle center of the circle coincides with a circle center of the first through hole 42; the fourth vernier scale 33 on the third measuring rod 3 is matched with the fourth angle main scale 41, the scale mark on the fourth vernier scale 33 is arranged along the annular end part of the cylinder of the third measuring rod 3, the scale mark on the fourth vernier scale 33 is arranged perpendicular to the scale mark on the fourth angle main scale 41, and the rotation angle of the positioning part 4 around the third measuring rod 3 axis can be known by reading the angle values on the fourth vernier scale 33 and the fourth angle main scale 41.
A second through hole 43 is formed in the top of the positioning body, and the positioning piece 4 is fixedly connected with the third measuring rod piece 3 by installing a first fastening piece 5 in the second through hole 43; the circle center line of the first through hole 42 is perpendicular to the circle center line of the second through hole 43. The first fastening member 5 is a first stud 51 and a fixing member 52, referring to fig. 3, the second through hole 43 is a threaded hole with internal threads, the fixing member 52 is arranged at the upper part in the second through hole 43 to contact with the third measuring rod, the first stud 51 is arranged at the lower part in the second through hole 43 to contact with the fixing member 52, the fixing member 52 is a circular arc structure corresponding to the inner wall of the first through hole 42, a slot with the same size as the fixing member 52 is arranged between the second through hole 43 and the first through hole 42, the fixing member 52 is firstly placed in the slot, the third measuring rod passes through the first through hole 42, then the first stud 51 is placed in the second through hole 43, the positioning member is fastened on the third measuring rod through the thrust action of the first stud 51 on the fixing member 52, and the design is mainly used for reducing the friction force between the positioning member and the third measuring rod when screwing, and the relative sliding between the positioning piece and the third measuring rod piece in the locking process is prevented.
The bottom of location body is provided with the matching foot 44 that is used for with the pipeline surface matching, the bottom of location body is equipped with the cavity space to form matching foot 44, see fig. 4, matching foot 44 both sides are equipped with the location curved surface that a plurality of symmetries set up respectively, and the location curved surface one-to-one of both sides has the location edge between every two adjacent location curved surfaces that lie in same side, and the location edge one-to-one and parallel arrangement of both sides. The matching leg 44 is a positioning curved surface (preferably a cylindrical surface) and a positioning edge formed by cutting curved surfaces with different radii, and is used for fitting with the outer surface of the pipeline and positioning the central axis direction of the front straight pipe section and the rear straight pipe section of the elbow. When the radius of the outer surface of the measured pipeline is just equal to the radius of a certain section of cylindrical surface of the matching foot, two symmetrical sections of curved surfaces on the matching foot are completely attached to the pipeline. When the radius of the outer surface of the detected pipeline is not equal to the radius of any section of the cylindrical surface on the matching foot, two symmetrical and parallel positioning edges (such as edges) on the matching foot are tightly attached to the outer surface of the pipeline. The measuring tool provided by the invention totally adopts 4 positioning pieces to position the central axis direction of two straight pipe sections in front of and behind an elbow, the two positioning pieces position the central axis direction of one straight pipe section (an elbow pipeline comprises two straight pipe sections and a bending section arranged between the two straight pipe sections) in a group, and simultaneously, 4 cylindrical surfaces or 4 edges are attached to the outer surfaces of the straight pipe sections, so that the positioning accuracy of the central axis direction is ensured, in the figure 4, an arrow A represents one cylindrical surface, an arrow B represents one cylindrical surface, an arrow C represents one cylindrical surface, an arrow D represents one cylindrical surface, and the radiuses of the cylindrical surfaces are different so as to match with pipelines with different diameters.
The first pole 34 and the second pole 36 of the third measurement rod member 3 are all sleeved with at least one positioning member 4, the first pole 34 and the second pole 36 are both provided with a fourth vernier scale 33 matched with a fourth angle main scale 41 on the positioning member 4, so as to measure the rotation angle of the positioning member 4 around the axis of the third measurement rod member 3.
The setting element is preferred to be set to four, the setting element is established including the cover and is located first setting element 7 and second setting element 8 and the cover and establish and measure the third setting element 9 and fourth setting element 10 on the pole piece 3 with the third of the same side with the second with first measurement pole piece on the pole piece 3 with the third of the same side, the interval between first setting element 7 and the second setting element 8 with the interval between third setting element 9 and the fourth setting element 10 equals, the interval of first setting element 7 apart from the third measurement pole piece 3 tip (the tip is the tip that the third measurement pole piece 3 is close to first measurement pole piece) equals with the interval of the third setting element 9 apart from the third measurement pole piece 3 tip that corresponds (the tip is the tip that the third measurement pole piece 3 is close to the second measurement pole piece).
The first measuring rod piece 1, the second measuring rod piece 2 and the third measuring rod piece 3 are all of telescopic structures, and the length of each rod piece can be adjusted at will according to the requirements of the pipe diameter and the space position. Some of the pipe surfaces are not completely smooth, and may have adverse factors such as granular protrusions, and the appropriate matching foot fitting positions can also be selected by adjusting the lengths of the first measuring pin 1, the second measuring pin 2 and the third measuring pin 3.
The first measuring rod piece 1 and the third measuring rod piece 3 are connected and locked through a second fastener, the second measuring rod piece 2 and the third measuring rod piece 3 are connected and locked, the included angle between the axis of the first measuring rod piece 1 and the corresponding third measuring rod piece 3 can be adjusted according to needs, and then the measuring angle displayed on a tool is directly read out (outside measurement) or the angle of the elbow is calculated according to the inner angle sum of the quadrangle (inside measurement).
Example 1
Embodiment 1 provides the matching foot of setting element and the three kinds of condition of pipeline surface laminating position, in the measurement, according to the pipeline site conditions, confirms the position of matching foot and pipeline laminating, then the angle of adjustment setting element in advance, need all be unanimous with the rotatory angle of the third measurement member piece that all 4 setting elements on the instrument correspond when adjusting the setting element angle, relative rotation angle reads out through angle main scale on the setting element and the vernier scale on the corresponding third measurement member piece, 3 kinds of condition are listed as follows:
case 1 is as shown in fig. 12, at this time, the rotation angle of the positioning member relative to the third measuring rod member is 0 °, and the 0 ° scale line of the fourth angular main scale 41 on the positioning member is aligned with the 0 ° scale line of the fourth vernier scale 33 on the third measuring rod member, and the reading is as shown in fig. 13.
Case 2 is as shown in fig. 14, at this time, the rotation angle of the positioning member relative to the third measuring rod is e 46.8 °, the reading angle of the fourth angle main scale 41 on the positioning member is 46 °, the 16 th graduation mark of the fourth vernier scale 33 on the third measuring rod 3 is aligned with the graduation mark on the fourth angle main scale 41, the vernier is indexed by 0.05 ° (i.e., 1 ° is divided into 20 equal parts), the reading angle of the fourth vernier scale 33 is 0.05 ° -16 ° -0.8 °, therefore, the rotation angle of the positioning member relative to the third measuring rod is 46.8 ° at this time, and the reading is as shown in fig. 15.
Case 3 is as shown in fig. 16, at this time, the rotation angle f of the positioning member relative to the third measuring rod is-36 degrees, the 0 ° graduation line of the fourth vernier scale 33 is aligned with the 324 ° graduation line of the fourth angular main scale 41, the rotation angle of the positioning member relative to the third measuring rod is 360 ° -324 ° which is 36 °, and the reading is shown in fig. 17.
Observing the space environment of the elbow of the measured pipeline before measurement, selecting a proper measurement direction, and determining whether an inside measurement method or an outside measurement method is adopted, wherein if an obstacle exists outside the elbow of the measured pipeline and a measurement tool cannot be placed, the inside measurement method is selected; if no obstacle exists outside the elbow of the pipeline to be measured, the measuring tool can be placed on the outer side of the pipeline, and then an outer side measuring method is selected. The readings taken by both measurement methods were the same.
Example 2
The invention provides a measuring method of the high-precision measuring tool for the angle of the pipe bend, which comprises an outer side measuring method with reference to fig. 18, wherein the outer side measuring method comprises the following steps:
s1, placing the high-precision measuring tool for the angle of the elbow of the pipeline on the pipeline to be detected, adjusting the angle of the third measuring rod piece corresponding to the positioning piece, so that the angle values of the positioning pieces are equal, designing the angle main rulers on the first positioning piece 7 and the second positioning piece 8 and the vernier scale on the corresponding third measuring rod piece, the angle main rulers on the third positioning piece 9 and the fourth positioning piece 10 and the vernier scale on the corresponding third measuring rod piece into a mutually symmetrical form, and ensuring that the angle readings of the 4 positioning pieces are completely consistent when the angles of the positioning pieces are adjusted before measurement, thus ensuring that the axes of the two third measuring rod pieces are parallel to the axes of the two straight pipe sections respectively and are in one point in space. During the measurement the setting element can not have relative rotation with the third and measure the member to cause and measure the inaccuracy, the contained angle between first measurement member and the third measurement member that corresponds is 180 degrees, the contained angle between second measurement member and the third measurement member that is located same side is 180.
During measurement, the lengths of the first measuring rod piece, the second measuring rod piece and the third measuring rod piece are adjusted to select proper matching positions, and after the matching pins of the 4 positioning pieces are tightly attached to the pipeline, the measuring angles are read.
S2, reading the included angle between the first measuring rod piece and the second measuring rod piece, the included angle is the angle of the pipeline elbow to be measured, namely reading the first angle main scale 11 on the first measuring rod piece and the reading on the second vernier scale 21 on the second measuring rod piece, the reading refers to fig. 19, as the third measuring rod piece is parallel to the corresponding straight pipe section on the pipeline elbow, the included angle between the first measuring rod piece and the corresponding third measuring rod piece is 180 degrees, and the included angle between the two third measuring rod pieces is equal to the included angle between the first measuring rod piece and the second measuring rod piece, namely the angle of the pipeline elbow to be measured.
The specific implementation mode is as follows:
after the angle of the positioning part relative to the corresponding third measuring rod piece is adjusted, the included angle between the first measuring rod piece and the third measuring rod piece positioned on the same side is locked at 180 degrees, at the moment, the angle of the elbow is directly read by reading the scales on the first angle main scale 11 on the first measuring rod piece and the second vernier scale 21 on the second measuring rod piece, the angle read from the first angle main scale 11 is 88 degrees, the 15 th scale mark of the second vernier scale 21 is aligned with the scale mark of the first angle main scale 11, and the angle read from the second vernier scale 21 is 0.05 x 15 which is 0.75 degrees, so that the measurement result of the angle g of the elbow is 88.75 degrees, namely, the two values are added.
Example 3
The invention also provides a measuring method of the high-precision measuring tool for the angle of the pipe bend, which comprises an inside measuring method with reference to fig. 20, wherein the inside measuring method comprises the following steps:
s1, placing the high-precision measuring tool for the angle of the elbow of the pipeline on the pipeline to be detected, and adjusting the angle of the positioning piece relative to the corresponding third measuring rod piece to enable the angle values of the positioning pieces to be equal;
s2, after adjusting an included angle between the first measuring rod and the third measuring rod located on the same side and an included angle between the second measuring rod and the third measuring rod located on the same side (the included angle between the first measuring rod and the corresponding third measuring rod is preferably 90 degrees), the angle of the pipe bend to be detected is calculated by the following formula:
α=360°-β123
β3=180°-β4
wherein α is elbow angle to be detected, β1The angle between the first measuring pin and the third measuring pin on the same side β2β is the angle between the second measuring rod and the third measuring rod on the same side4Is the angle between the first measuring pin and the second measuring pin, β3Is β4The angle is complemented.
The specific implementation mode is as follows:
β1β is obtained by reading the degrees of the first vernier scale 12 on the first measuring rod 1 and the second main angle scale 31 on the third measuring rod 3 on the same side, see fig. 22, for the angle between the first measuring rod and the third measuring rod on the same side1At an angle of 90 DEG β2β is obtained by reading the degree of the third vernier 22 on the second measuring rod 2 and the second angle main scale 31 on the third measuring rod 3 on the same side for the included angle between the second measuring rod and the third measuring rod on the same side2At 60 deg., see fig. 21, β4For the included angle between the first measuring rod piece and the second measuring rod piece, β is obtained by reading the degrees of the first angle main scale 11 on the first measuring rod piece 1 and the second vernier scale 21 on the second measuring rod piece 2488.75 deg., see fig. 23, and 180 deg. minus β according to the complementary relationship4β is obtained391.25 degrees, and finally obtaining the measured angle according to the quadrilateral internal angle and the formulaElbow angle α, in this embodiment, α is 118.75 °.
Specifically describing the scales on the first angle main scale 11, wherein the range of the upper half of the first angle main scale 11 is 0-180 degrees, and the scales are marked as the scales indicated by an arrow j, and can be used for reading during inner side measurement and marking the characters of 'inner side measurement' for distinguishing; the other half range is 0-180 degrees, and the scale is marked as an arrow k, and the scale is used for reading in the outside measurement and can be marked with the word 'outside measurement' for distinguishing. In the initial state, the second vernier 21 of the second measuring rod member is close to the fifth rod 23 of the second measuring rod member 2, and the scale of the outer measuring part corresponds to the scale line of the second vernier 21.
For example, when measuring the outer side, the angle between the first measuring rod and the third measuring rod located on the same side is 180 °, the angle between the second measuring rod and the third measuring rod located on the same side is 180 °, and at this time, the outer side measuring scale on the first measuring rod is matched with the second vernier 21 on the second measuring rod to directly read the angle of the elbow.
When the inner side is measured, the first measuring rod piece and the third measuring rod piece positioned on the same side rotate relatively, the second measuring rod piece and the third measuring rod piece positioned on the same side rotate relatively, at the moment, the second vernier scale 21 on the second measuring rod piece rotates to the side of the inner side measuring scale on the first measuring rod piece to be matched with the inner side measuring scale for reading, and then the elbow angle value is calculated through a formula.
Usually, the angle of the pipe bend is less than 180 degrees, the rotation angle between the first measuring rod and the second measuring rod is not more than 180 degrees, and the designed angle range on the first angle main scale 11 is 0-180 degrees.
The high-precision measuring tool for the angle of the pipeline elbow, which is designed by the invention, realizes the high-precision measurement of the angle of the pipeline elbow, and can guide the precision processing of the required elbow by measuring the angles of the front and rear straight pipe sections of the elbow aiming at a pipeline system in the installation process; aiming at an installed or in-service pipeline system, the small change of the angle of the elbow in the pipeline system can be captured through the high-precision measurement of the angle of the elbow, so that the safety of the pipeline elbow and even the whole pipeline system can be quantitatively evaluated; the precise positioning of the axis of the straight pipe section is realized by adopting multipoint matching; all relative displacement (angular displacement) and measurement adopt a vernier form, the precision of a measurement result is improved from 1 degree to 0.05 degree, and the measurement of the small variation of the angle of the elbow is realized. If more accurate measurement needs to be carried out, the measurement accuracy can be further improved by changing the graduation of the vernier; the radial directions of the pipeline can be measured, and the field applicability is greatly improved; through the adjustment of the angle of the telescopic part and the matching foot, the straight pipe section can be matched at any position, adverse factors on the pipeline can be effectively avoided, the applicability of the tool is improved, and the measuring precision is ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The high-precision measuring tool for the angle of the pipeline elbow is characterized by comprising a first measuring rod piece (1) and a second measuring rod piece (2) which are connected in a rotating mode, wherein the end portions, far away from a connecting portion, of the first measuring rod piece (1) and the second measuring rod piece (2) are respectively provided with a third measuring rod piece (3), the first measuring rod piece (1) is connected with the third measuring rod piece (3) located on the same side in a rotating mode, and the second measuring rod piece (2) is connected with the third measuring rod piece (3) located on the same side in a rotating mode; one end of the first measuring rod piece (1) is provided with a first angle main scale (11), the other end of the first measuring rod piece is provided with a first vernier scale (12), one end of the second measuring rod piece (2) is provided with a second vernier scale (21), the other end of the second measuring rod piece is provided with a third vernier scale (22), and the first angle main scale (11) is matched with the second vernier scale (21) so as to be used for measuring an included angle between the axis of the first measuring rod piece (1) and the axis of the second measuring rod piece (2);
each third measuring rod piece (3) is provided with a second main angle ruler (31), and the second main angle ruler (31) is matched with the first vernier scale (12) on the first measuring rod piece (1) positioned on the same side so as to be used for measuring an included angle between the axis of the first measuring rod piece (1) and the axis of the corresponding third measuring rod piece (3); the second angle main ruler (31) is matched with the third vernier ruler (22) on the second measuring rod piece (2) positioned on the same side, so that the included angle between the axis of the second measuring rod piece (2) and the axis of the corresponding third measuring rod piece (3) can be measured;
every third is measured the cover and is equipped with two at least and pipeline (17) complex setting element (4) that awaits measuring on member (3), setting element (4) with member (3) are measured to the third and are rotated mutually and be connected, be provided with fourth angle main scale (41) on setting element (4), be provided with on member (3) is measured to the third with fourth angle main scale (41) assorted fourth vernier scale (33), in order to be used for measuring rotation angle of member (3) axis is measured around the third to setting element (4).
2. The high-precision measuring tool for the angle of the pipe bend according to claim 1, wherein the positioning member (4) comprises a positioning body, the positioning body is provided with a first through hole (42) matched with the third measuring rod member (3), both end faces of the first through hole (42) are fourth angle main rulers (41) with scale marks, and the center of the first through hole (42) is coaxial with the axis of the third measuring rod member (3); the top of the positioning body is provided with a second through hole (43), and the positioning piece (4) is fixedly connected with the third measuring rod piece (3) by installing a first fastener (5) in the second through hole (43); the circle center line of the first through hole (42) is perpendicular to the circle center line of the second through hole (43).
3. The tool for measuring the angle of the pipe bend with high precision as claimed in claim 2, wherein the bottom of the positioning body is provided with a matching foot (44) for matching with the outer surface of the pipe (17) to be measured, two sides of the matching foot (44) are respectively provided with a plurality of symmetrically arranged positioning curved surfaces, the positioning curved surfaces on the two sides are in one-to-one correspondence, a positioning edge is arranged between every two adjacent positioning curved surfaces on the same side, and the positioning edges on the two sides are in one-to-one correspondence and are arranged in parallel.
4. The pipe bend angle high-precision measuring tool according to claim 1, wherein the third measuring rod (3) is of a telescopic structure, the third measuring rod (3) comprises a first rod (34) and a second rod (36) connected with the first rod (34), the axis of the first rod (34) and the axis of the second rod (36) are located on the same straight line, at least one positioning member (4) is sleeved outside each of the first rod (34) and the second rod (36), and a fourth vernier scale (33) matched with a fourth angle main scale (41) on the positioning member (4) is arranged on each of the first rod (34) and the second rod (36); the end part, far away from the second rod (36), of the first rod (34) is provided with a third through hole (35) matched with the first measuring rod piece or the second measuring rod piece, the end face of the third through hole (35) is provided with a second angle main ruler (31), and the circle center line of the third through hole (35) is perpendicular to the axis of the third measuring rod piece (3).
5. The tool for high-precision measurement of the angle of the pipe bend according to claim 4, wherein the first measuring rod (1) is of a telescopic structure, the first measuring rod (1) comprises a third rod (13) and a fourth rod (14) connected with the third rod (13), a fourth through hole (15) is formed in the end, far away from the fourth rod (14), of the third rod (13), and the upper end face of the fourth through hole (15) is a first main angle ruler (11) with scale marks; the end part, far away from the third rod (13), of the fourth rod (14) comprises a first connecting part (18) and a second connecting part (19) which are arranged oppositely up and down, a space for accommodating one end part of the third measuring rod piece (3) positioned on the same side is arranged between the first connecting part (18) and the second connecting part (19), fifth through holes (16) which are arranged oppositely are formed in the first connecting part (18) and the second connecting part (19), the circular center line of each fifth through hole (16) is perpendicular to the axis of the second rod (36), and first vernier scales (12) with scale marks are arranged on the outer side surfaces of the circular arc structures of the first connecting part (18) and the second connecting part (19); the first measuring rod (1) is fixedly connected with the third measuring rod (3) positioned on the same side by installing a second fastening piece (6) in the fifth through hole (16).
6. The pipe bend angle high-precision measuring tool according to claim 1, wherein the second measuring rod (2) is of a telescopic structure, the second measuring rod (2) comprises a fifth rod (23) and a sixth rod (24) connected with the fifth rod (23), a sixth through hole (25) is formed in the end, far away from the sixth rod (24), of the fifth rod (23), and the upper end face of the sixth through hole (25) is provided with a second vernier scale (21) with scale marks; the end part, far away from the fifth rod (23), of the sixth rod (24) comprises a third connecting part (28) and a fourth connecting part (29) which are arranged oppositely up and down, a space for accommodating one end part of the third measuring rod piece (3) positioned on the same side is arranged between the third connecting part (28) and the fourth connecting part (29), seventh through holes (27) which are arranged oppositely are formed in the third connecting part (28) and the fourth connecting part (29), the circle center line of each seventh through hole (27) is perpendicular to the axis of the sixth rod (24), and third vernier scales (22) with scale marks are arranged on the side surfaces of the two seventh through holes (27); the second measuring rod is fixedly connected with the third measuring rod (3) positioned on the same side by installing a second fastening piece (6) in the seventh through hole (27).
7. The pipe bend angle high accuracy measurement tool according to claim 1, wherein the extending direction of the scale on the first angle main scale (11) is arranged in parallel with the extending direction of the scale on the second vernier (21), the scale on the second angle main scale (31) is arranged perpendicular to the scale on the first vernier (12) or the third vernier (22), and the scale on the fourth angle main scale (41) is arranged perpendicular to the scale on the fourth vernier (33).
8. The tool for high-precision measurement of the angle of pipe bends according to claim 2, characterized in that the first fastening member (5) is a first stud (51) and a fixing member (52), the second through hole (43) is a threaded hole with internal threads, the fixing member (52) is arranged at the upper inner portion of the second through hole (43) to contact the third measuring rod, and the first stud (51) is arranged at the upper inner portion of the second through hole (43) to contact the fixing member (52).
9. A measurement method based on the tool for measuring the angle of a pipe bend with high precision as claimed in any one of claims 1 to 8, characterized by comprising an outside measurement method, wherein the outside measurement method comprises the following steps:
s1, placing the high-precision measuring tool for the angle of the elbow of the pipeline on the pipeline to be detected, firstly adjusting the angle of the positioning piece relative to the corresponding third measuring rod piece to ensure that the angle values of the positioning pieces are equal, wherein the included angle between the first measuring rod piece and the corresponding third measuring rod piece is 180 degrees, and the included angle between the second measuring rod piece and the third measuring rod piece positioned on the same side is 180 degrees;
and S2, reading an included angle between the first measuring rod piece and the second measuring rod piece, wherein the included angle is the angle of the pipeline elbow to be detected.
10. A measurement method based on the tool for measuring the angle of pipe bend with high precision in any one of claims 1 to 8, characterized by comprising an inside measurement method, wherein the inside measurement method comprises the following steps:
s1, placing the high-precision measuring tool for the angle of the elbow of the pipeline on the pipeline to be detected, and adjusting the angle of the positioning piece relative to the corresponding third measuring rod piece to enable the angle values of the positioning pieces to be equal;
s2, after adjusting an included angle between the first measuring rod and the third measuring rod located on the same side and an included angle between the second measuring rod and the third measuring rod located on the same side, calculating the angle of the pipe bend to be detected by the following formula:
β3=180°-β4
α=360°-β123
wherein α is elbow angle to be detected, β1Is a first measuring rod andthe angle between the third measuring bars on the same side, β2The angle between the second measuring pin and the third measuring pin on the same side β4Is the angle between the first measuring pin and the second measuring pin, β3Is β4The angle is complemented.
CN201911307760.6A 2019-12-18 2019-12-18 High-precision measuring tool and method for angle of pipeline elbow Active CN110966910B (en)

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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3545089A (en) * 1969-01-21 1970-12-08 Pines Eng Co Inc Device for measuring angular deviation of portions of a workpiece
CN87200704U (en) * 1987-01-20 1987-12-26 武汉水运工程学院 Angle direct measuring device for automatic pipe bending
GB2191011B (en) * 1986-05-17 1990-01-31 Wilmid Ind Limited Measuring or checking angle
CN1068419A (en) * 1991-07-08 1993-01-27 武汉水运工程学院 Computerized resilience and elongation instrument for bent tubes
KR200249853Y1 (en) * 2001-06-27 2001-11-16 대우조선공업 주식회사 A angle measuring device for benting pipe
CN201622055U (en) * 2009-10-23 2010-11-03 上海宝冶建设有限公司 Elbow ganiometer
CN203274652U (en) * 2013-03-14 2013-11-06 李永红 Bent pipe angle measuring instrument
CN203459464U (en) * 2013-08-01 2014-03-05 辽宁瑞丰专用车制造有限公司 Elbow bending angle measurement device
CN203881279U (en) * 2013-12-30 2014-10-15 中国石油天然气第一建设公司 Tool for measuring combination angle of bend and pipeline
CN108592741A (en) * 2018-04-19 2018-09-28 中船黄埔文冲船舶有限公司 A kind of ship school pipe data dispensing device
CN208847104U (en) * 2018-11-22 2019-05-10 黑龙江科技大学 A kind of angle measurement unit
CN209166323U (en) * 2018-12-07 2019-07-26 中车长春轨道客车股份有限公司 Pipeline bending process measuring gauge special
CN209310711U (en) * 2018-11-28 2019-08-27 武汉市晴川焊接无损检测有限公司 A kind of novel pressure-bearing tube bending angle measurement unit

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3545089A (en) * 1969-01-21 1970-12-08 Pines Eng Co Inc Device for measuring angular deviation of portions of a workpiece
GB2191011B (en) * 1986-05-17 1990-01-31 Wilmid Ind Limited Measuring or checking angle
CN87200704U (en) * 1987-01-20 1987-12-26 武汉水运工程学院 Angle direct measuring device for automatic pipe bending
CN1068419A (en) * 1991-07-08 1993-01-27 武汉水运工程学院 Computerized resilience and elongation instrument for bent tubes
KR200249853Y1 (en) * 2001-06-27 2001-11-16 대우조선공업 주식회사 A angle measuring device for benting pipe
CN201622055U (en) * 2009-10-23 2010-11-03 上海宝冶建设有限公司 Elbow ganiometer
CN203274652U (en) * 2013-03-14 2013-11-06 李永红 Bent pipe angle measuring instrument
CN203459464U (en) * 2013-08-01 2014-03-05 辽宁瑞丰专用车制造有限公司 Elbow bending angle measurement device
CN203881279U (en) * 2013-12-30 2014-10-15 中国石油天然气第一建设公司 Tool for measuring combination angle of bend and pipeline
CN108592741A (en) * 2018-04-19 2018-09-28 中船黄埔文冲船舶有限公司 A kind of ship school pipe data dispensing device
CN208847104U (en) * 2018-11-22 2019-05-10 黑龙江科技大学 A kind of angle measurement unit
CN209310711U (en) * 2018-11-28 2019-08-27 武汉市晴川焊接无损检测有限公司 A kind of novel pressure-bearing tube bending angle measurement unit
CN209166323U (en) * 2018-12-07 2019-07-26 中车长春轨道客车股份有限公司 Pipeline bending process measuring gauge special

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