CN114459415B - Device and method for measuring rotation angle of spherical joint - Google Patents
Device and method for measuring rotation angle of spherical joint Download PDFInfo
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- CN114459415B CN114459415B CN202111641479.3A CN202111641479A CN114459415B CN 114459415 B CN114459415 B CN 114459415B CN 202111641479 A CN202111641479 A CN 202111641479A CN 114459415 B CN114459415 B CN 114459415B
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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Abstract
The invention provides a device and a method for measuring the rotation angle of a spherical joint, wherein the device comprises a pipe sleeve base and a tracer injection system; the pipe sleeve base comprises two symmetrical structural bases which are fixedly connected and paired for use; the tracer injection system comprises an injection pipe, a height plate, a booster pump and a flow divider; the height plate is connected with the structural base of the pipe sleeve base and is provided with a sliding slot hole; a support column is arranged in the middle of the injection pipe, is used for being connected with the buckle and is fixed on the height plate; the booster pump provides high-pressure water, the tracer is added by the shunt and then is shunted to the liquid supply hole of the injection pipe, the high-pressure water is sprayed out through the injection hole, a mark point is formed on the wall surface of the heating furnace, the height of the injection pipe is adjusted through the height plate, and the interference between the sprayed liquid and a pipeline deformed after loading is avoided. The invention can realize the measurement of the rotation angle of the spherical joint of the pipeline system in a closed environment and has the advantages of simple structure, little damage to the original pipeline system, good controllability and high safety.
Description
Technical Field
The invention belongs to the field of pipeline system measurement, and particularly relates to a device and a method for measuring a rotation angle of a spherical joint.
Background
The air pipeline can displace and deform under the conditions of high temperature and high pressure, and a spherical joint is often added to compensate the stress of the pipeline, is also called an angular corrugated pipe compensator and is one of limiting corrugated pipes. It depends on the expansion and contraction of the corrugated pipe to absorb displacement to release the primary or secondary stress. The ball joint is a non-detachable connector, is used for thermal compensation and increasing the flexibility of a pipeline in the pipeline, and is a component with the strongest stress compensation capability in a high-temperature and high-pressure air pipeline system.
The test of the high-temperature high-pressure air pipeline needs to be carried out in a closed heating furnace, the condition of the pipeline in the furnace cannot be observed from the outside of the heating furnace due to the invisibility of the heating furnace, meanwhile, the displacement and deformation of the pipeline after heating and pressurizing are in a three-dimensional space, and the measurement of the rotation angle of the spherical joint under the condition is a problem which needs to be solved urgently.
In view of the above, the present invention provides an apparatus and a method for measuring a rotation angle of a ball joint, which have simple structure, convenient installation and small influence on a test pipeline, and calibrates the rotation angle of the ball joint through establishment of a coordinate system and formula calculation, so as to provide a technical reference for the rotation angle measurement of the ball joint in a high-temperature and high-pressure air pipeline.
The invention content is as follows:
the purpose of the invention is as follows: in order to solve the problems in the prior art, the invention provides the device and the method for measuring the rotation angle of the spherical joint, which have the advantages of simple structure, convenience in installation and small influence on a test pipeline, and the rotation angle of the spherical joint in the high-temperature high-pressure air pipeline can be measured.
The technical scheme is as follows: the invention provides a device for measuring the rotation angle of a spherical joint, which comprises: a shroud base and a tracer injection system; the pipe sleeve base comprises two symmetrical structural substrates which are fixedly connected and paired for use; the tracer injection system comprises an injection pipe, a height plate, a booster pump and a flow divider; the height plate is connected with the structural base of the pipe sleeve base and is provided with a sliding slot hole; the injection pipe comprises two injection holes and a liquid supply hole, and a support column is arranged in the middle of the injection pipe, is connected with a buckle, is fixed on the height plate, and is kept in the sliding groove hole to translate without rotating; the booster pump provides high pressure water, shunts the confession liquid hole of injection pipe after adding the tracer by the shunt, through the jet orifice blowout, forms the mark point at the heating furnace wall, adjusts the injection pipe height through the altitude board, avoids the pipeline of the liquid of erupting and loading after-deformation to produce the interference.
Furthermore, the height plate is provided with scale marks.
Further, the support column is a rectangular column.
Furthermore, the center of the injection pipe is positioned in the center of the structure substrate, so that when the two pipe sleeve bases are combined, a plane formed by the center lines of the two injection pipes passes through the center line of the pipe sleeve base.
Further, the diverter has four channels into which a tracer is added as liquid flows.
Based on the same inventive concept, the invention also provides a method for measuring the rotation angle of the spherical joint, which comprises the following steps:
(1) Respectively installing measuring devices on two sides of the spherical joint, fixing the port of the test section pipeline in a rectangular heating furnace, establishing a space rectangular coordinate system O by taking any vertex of the inner wall of the heating furnace as an origin and the furnace edge passing through the origin as a coordinate axis XYZ ；
(2) Heating and pressurizing a test section pipeline, starting a booster pump when the temperature of the heating furnace reaches a set value, ejecting water containing a tracer from an ejection hole, forming 8 mark points on the wall surface of the heating furnace, and measuring to obtain the coordinates of the 8 mark points: the injection pipes at one side of the spherical joint are marked as A and B, and the coordinates of the injected points are marked as A 1 (x 1 ，y 1 ，z 1 )，A 2 (x 2 ，y 2 ，z 2 )，B 1 (x 3 ，y 3 ，z 3 )，B 2 (x 4 ，y 4 ，z 4 ) The jet pipe at the other side is marked as C and D, and the coordinate of the jet point is marked as C 1 (x 5 ，y 5 ，z 5 )，C 2 (x 6 ，y 6 ，z 6 )，D 1 (x 7 ，y 7 ，z 7 )，D 2 (x 8 ，y 8 ，z 8 )；
(3) From the injection point A 1 ，A 2 The resulting straight line is denoted as L 1 ，L 1 I.e. the axial direction, L, of the air line on the side of the displaced injection pipe A 1 Direction vector n of 1 Is (x) 2 -x 1 ,y 2 -y 1 ,z 2 -z 1 )；
(4) From the injection point C 1 ，C 2 The resulting straight line is denoted L 2 ，L 2 I.e. the axial direction, L, of the air line on the side of the displaced injection pipe C 2 Is directed to a direction vector n 2 Is (x) 6 -x 5 ,y 6 -y 5 ,z 6 -z 5 )；
(5) From the injection point A 1 ，A 2 ，B 1 ，B 2 Formed face A 1 A 2 B 1 B 2 And the normal vector n of the surface 3 Establishing a local space rectangular coordinate system O' X’Y’Z’ ，L 1 And n 3 Two axes of the rectangular coordinate system in local space, respectively, are marked as Y 'and X', respectively, and the plane A 1 A 2 B 1 B 2 Marked as the Y ' O ' Z ' plane, plane A 1 A 2 B 1 B 2 Normal vector n of 3 (A,B,C)；
(6) By line L 2 With the surface A 1 A 2 B 1 B 2 The equation can be used to obtain the line L 2 With the surface A 1 A 2 B 1 B 2 Angle alpha of (a) and line L 2 At the surface A 1 A 2 B 1 B 2 Upper projection line L 3 Equation of (c), again by line L 3 And line L 1 The equation of (c) can find the line L 3 And line L 1 Wherein α and β are acute angles;
is provided with L 2 The plane beam equation of (a) is:
(y 6 -y 5 )x+(λ(z 6 -z 5 )-(x 6 -x 5 ))y-λ(y 6 -y 5 )z-x 5 y 6 +x 6 y 5 +λ(-y 5 z 6 +z 5 y 6 )＝0
(7) A normal vector n 2 Substituting (= (A, B, C)) into the plane beam equation to obtain λ value, substituting λ into the plane beam equation, and solving to obtain a plane equation of A 1 x+B 1 y+C 1 z+D 1 =0, wherein A 1 ，B 1 ，C 1 ，D 1 The values are all obtained; projection line L 3 Is directed to a direction vector n 4 ＝(A 1 ,B 1 ,C 1 )×(A,B,C)；
cosβ＝cos<n 1 ·n 4 >
Therefore, the rotation angle of the spherical joint under the rectangular coordinate system of the local space is as follows: the rotation is performed by beta in the Y 'O' Z 'plane and alpha in the normal direction of the Y' O 'Z' plane.
Has the beneficial effects that: compared with the prior art, the invention has the beneficial effects that: the gravity and the pressure during spraying of the device are very small and can be ignored compared with the stress on the air pipeline under the conditions of high temperature and high pressure; the device is suitable for measuring the rotation angle of the spherical joint in the high-temperature and high-pressure air pipeline test, and has the advantages of simplicity, reliability, easiness in operation, small influence on the test pipeline and the like.
Drawings
FIG. 1 is a schematic view of a pipe sleeve apparatus according to the present invention;
FIG. 2 is a schematic diagram of a tracer injection system according to the present invention;
FIG. 3 is a schematic view of the present invention installed on a pipeline;
the device comprises a structure substrate 1, an injection pipe 2, a height plate 3, a booster pump 4, a flow divider 5, a sliding groove hole 6, an injection hole 7, a liquid supply hole 8, a buckle 9 and a heating furnace 10.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, an apparatus for measuring a rotation angle of a ball joint according to the present invention includes a socket base and a tracer injection system. The pipe sleeve base comprises two symmetrical structural substrates 1, and the two symmetrical structural substrates 1 are fixedly connected and matched for use; the tracer injection system comprises an injection pipe 2, a height plate 3, a booster pump 4 and a flow divider 5; the height plate 3 is connected with the structural substrate 1 of the pipe sleeve base and is provided with a sliding slot hole 6; the injection pipe 2 comprises two injection holes 7 and a liquid supply hole 8, a support column is arranged in the middle of the injection pipe, is a rectangular column, is connected with a buckle 9, is fixed on the height plate 3, and is kept in the sliding groove hole 6 to translate without rotating; the booster pump 4 provides high-pressure water, is added with the tracer by the shunt 5 and is shunted to the liquid supply hole 8 of the injection pipe 2, is sprayed out through the injection hole 7, forms a mark point on the wall surface of the heating furnace 10, is provided with scale marks on the height plate 3, and adjusts the height of the injection pipe 2 through the height plate 3, thereby avoiding the sprayed liquid from interfering with a pipeline deformed after loading. The center of the injection pipe 2 is positioned in the center of the structure substrate 1, so that when the two pipe sleeve base seats are combined, a plane formed by the center lines of the two injection pipes 2 passes through the center line of the pipe sleeve base seat 1. The flow divider 5 has four channels into which the tracer is added as the liquid flows through. In the embodiment, two symmetrical structural substrates are fixedly connected and paired through bolts for use.
Based on the same inventive concept, the invention also provides a method for measuring the rotation angle of the spherical joint, which comprises the following specific implementation processes:
when a high-temperature high-pressure air pipeline test is carried out, two pairs of measuring devices are installed on two sides of a spherical joint of a test section, a pipeline port of the test section is fixed in a rectangular heating furnace, the rotation angle of the spherical joint is 0 degree in an initial state, any vertex of the inner wall of the heating furnace is taken as an original point, and a space rectangular coordinate system O is established by taking the furnace edge passing through the point as a coordinate axis XYZ . And heating and pressurizing the test section pipeline, starting the booster pump when the temperature of the heating furnace reaches a set value, ejecting water containing the tracer from the ejection holes, forming 8 marking points on the wall surface of the heating furnace, and measuring to obtain the coordinates of the 8 marking points.
The injection pipes at one side of the spherical joint are marked as A and B, and the coordinates of the injected points are marked as A 1 (x 1 ，y 1 ，z 1 )，A 2 (x 2 ，y 2 ，z 2 )，B 1 (x 3 ，y 3 ，z 3 )，B 2 (x 4 ，y 4 ，z 4 ) The jet pipe at the other side is marked as C and D, and the coordinate of the jet point is marked as C 1 (x 5 ，y 5 ，z 5 )，C 2 (x 6 ，y 6 ，z 6 )，D 1 (x 7 ，y 7 ，z 7 )，D 2 (x 8 ，y 8 ，z 8 )。
From the injection point A 1 ，A 2 The resulting straight line is denoted L 1 ，L 1 Namely the axial direction of the air pipeline on the side of the injection pipe A after displacement. L is 1 The equation of (a) is:
L 1 direction vector n of 1 Is (x) 2 -x 1 ,y 2 -y 1 ,z 2 -z 1 )。
From the injection point C 1 ，C 2 The resulting straight line is denoted L 2 ，L 2 Namely the axial direction of the air pipeline at the side of the injection pipe C after displacement. L is 2 The equation of (a) is:
rewritable as follows:
L 2 direction vector n of 2 Is (x) 6 -x 5 ,y 6 -y 5 ,z 6 -z 5 )。
From the injection point A 1 ，A 2 ，B 1 ，B 2 Formed face A 1 A 2 B 1 B 2 And the normal vector n of the surface 3 Establishing a local space rectangular coordinate system O' X’Y’Z’ ，L 1 And n 3 Two axes of the local space rectangular coordinate system, respectively, marked as Y 'and X', respectively, and a plane A 1 A 2 B 1 B 2 Denoted as the Y ' O ' Z ' plane.
Noodle A 1 A 2 B 1 B 2 The equation under the global coordinate system is:
Ax+By+Cz+D＝0
a is to be 1 ，A 2 ，B 1 Substituting three-point coordinates to obtain values of A, B, C and D, wherein the values are respectively as follows:
noodle A 1 A 2 B 1 B 2 Normal vector n of 3 Is (A, B, C).
By line L 2 With the surface A 1 A 2 B 1 B 2 The equation can be used to obtain the line L 2 With the surface A 1 A 2 B 1 B 2 Angle alpha (taking an acute angle) and line L 2 At the surface A 1 A 2 B 1 B 2 Upper projection line L 3 Is then given by the line L 3 And line L 1 The equation of (c) can find the line L 3 And line L 1 Is taken at an acute angle.
Is provided with L 2 The plane beam equation of (a) is:
(y 6 -y 5 )x+(λ(z 6 -z 5 )-(x 6 -x 5 ))y-λ(y 6 -y 5 )z-x 5 y 6 +x 6 y 5 +λ(-y 5 z 6 +z 5 y 6 )＝0
a normal vector n 2 Substituting (= A, B, C) into the plane beam equation to obtain λ value, substituting λ into the plane beam equation to obtain
The plane equation is A 1 x+B 1 y+C 1 z+D 1 =0, wherein A 1 ，B 1 ，C 1 ，D 1 The values are obtained.
Projection line L 3 The equation of (a) is:
projection line L 3 Direction vector n of 4 ＝(A 1 ,B 1 ,C 1 )×(A,B,C)
cosβ＝cos<n 1 ·n 4 >
Therefore, the rotation angle of the spherical joint under the rectangular coordinate system of the local space is as follows: the rotation is performed by beta in the Y 'O' Z 'plane and alpha in the normal direction of the Y' O 'Z' plane.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A method for measuring the rotation angle of a spherical joint is characterized by comprising the following steps:
(1) Respectively installing measuring devices on two sides of the spherical joint, fixing the port of the test section pipeline in a rectangular heating furnace, establishing a space rectangular coordinate system O by taking any vertex of the inner wall of the heating furnace as an origin and the furnace edge passing through the origin as a coordinate axis XYZ (ii) a The measuring device comprises a pipe sleeve base and a tracer injection system;
(2) Heating and pressurizing a test section pipeline, starting a booster pump when the temperature of the heating furnace reaches a set value, ejecting water containing a tracer from an ejection hole, forming 8 mark points on the wall surface of the heating furnace, and measuring to obtain the coordinates of the 8 mark points: the injection pipes at one side of the spherical joint are marked as A and B, and the coordinates of the injected points are marked as A 1 (x 1 ，y 1 ，z 1 )，A 2 (x 2 ，y 2 ，z 2 )，B 1 (x 3 ，y 3 ，z 3 )，B 2 (x 4 ，y 4 ，z 4 ) The jet pipe at the other side is marked as C and D, and the coordinate of the jet point is marked as C 1 (x 5 ，y 5 ，z 5 )，C 2 (x 6 ，y 6 ，z 6 )，D 1 (x 7 ，y 7 ，z 7 )，D 2 (x 8 ，y 8 ，z 8 )；
(3) From the injection point A 1 ，A 2 The resulting straight line is denoted L 1 ，L 1 I.e. the axial direction, L, of the air pipeline on the side of the injection pipe A after displacement 1 Is directed to a direction vector n 1 Is (x) 2 -x 1 ,y 2 -y 1 ,z 2 -z 1 )；
(4) From the injection point C 1 ，C 2 The resulting straight line is denoted as L 2 ，L 2 I.e. the axial direction, L, of the air line on the side of the displaced injection pipe C 2 Is directed to a direction vector n 2 Is (x) 6 -x 5 ,y 6 -y 5 ,z 6 -z 5 )；
(5) From the injection point A 1 ，A 2 ，B 1 ，B 2 Formed face A 1 A 2 B 1 B 2 And the normal vector n of the surface 3 Establishing a local space rectangular coordinate system O' X’Y’Z’ ，L 1 And n 3 Two axes of the rectangular coordinate system in local space, respectively, are marked as Y 'and X', respectively, and the plane A 1 A 2 B 1 B 2 Marked as the Y ' O ' Z ' plane, plane A 1 A 2 B 1 B 2 Normal vector n of 3 (A,B,C)；
(6) By line L 2 With the surface A 1 A 2 B 1 B 2 The equation can be used to obtain the line L 2 With the surface A 1 A 2 B 1 B 2 Angle alpha of (a) and line L 2 On the surface A 1 A 2 B 1 B 2 Upper projection line L 3 Equation of (c), again by line L 3 And line L 1 The equation of (c) can find the line L 3 And line L 1 Wherein α and β are acute angles;
is provided with L 2 The plane beam equation of (a) is:
(y 6 -y 5 )x+(λ(z 6 -z 5 )-(x 6 -x 5 ))y-λ(y 6 -y 5 )z-x 5 y 6 +x 6 y 5 +λ(-y 5 z 6 +z 5 y 6 )＝0
(7) A normal vector n 2 Substituting (= A, B, C) into the plane beam equation to obtain λ value, substituting λ into the plane beam equation to obtainThe plane equation is A 1 x+B 1 y+C 1 z+D 1 =0, wherein A 1 ，B 1 ，C 1 ，D 1 The values are all obtained; projection line L 3 Is directed to a direction vector n 4 ＝(A 1 ,B 1 ,C 1 )×(A,B,C)；
cosβ＝cos＜n 1 ·n 4 ＞
Therefore, the rotation angle of the spherical joint under the rectangular coordinate system of the local space is as follows: the rotation is performed by beta in the Y 'O' Z 'plane and alpha in the normal direction of the Y' O 'Z' plane.
2. The method for measuring the rotation angle of the spherical joint as claimed in claim 1, wherein the pipe sleeve base comprises two symmetrical structural bases, and the two symmetrical structural bases are fixedly connected and used in a matched manner; the tracer injection system comprises an injection pipe, a height plate, a booster pump and a flow divider; the height plate is connected with the structural base of the pipe sleeve base and is provided with a sliding slot hole; the injection pipe comprises two injection holes and a liquid supply hole, and a support column is arranged in the middle of the injection pipe, is connected with a buckle, is fixed on the height plate, and is kept in the sliding groove hole to translate without rotating; the booster pump provides high pressure water, shunts the confession liquid hole of injection pipe after adding the tracer by the shunt, through the jet orifice blowout, forms the mark point at the heating furnace wall, adjusts the injection pipe height through the altitude board, avoids the pipeline of the liquid of erupting and loading after-deformation to produce the interference.
3. A method of measuring the angle of rotation of a ball joint as set forth in claim 2 wherein the elevation plate has graduation marks thereon.
4. The method of claim 2, wherein the support column is a rectangular column.
5. The method of claim 2, wherein the center of the jet pipe is centered on the structural base to ensure that when the two pipe socket assemblies are assembled, the plane defined by the centerlines of the two jet pipes passes through the centerline of the pipe socket assembly.
6. A method of measuring the angle of rotation of a ball joint as claimed in claim 2 wherein the diverter has four channels into which the tracer is added as the liquid flows.
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| CN115060487A (en) * | 2022-06-24 | 2022-09-16 | 洛阳拖拉机研究所有限公司 | Reed valve detection device and system |
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| CN203148778U (en) * | 2013-04-16 | 2013-08-21 | 葛洲坝集团试验检测有限公司 | Holder for dial indicator for measuring tensile deformation of steel bar joint |
| CN205288241U (en) * | 2015-11-22 | 2016-06-08 | 天津大港油田圣达科技有限公司 | Spike agent sprays mixing arrangement |
| CN205808361U (en) * | 2016-07-11 | 2016-12-14 | 大连理工大学 | Spigot-and-socket pipe joint deformation measuring device based on distributive fiber optic strain sensor |
| CN207318214U (en) * | 2016-12-08 | 2018-05-04 | 江苏苏博特新材料股份有限公司 | A kind of adjustable reinforced bar sleeve grouting jointing deformation performance test device of gauge length |
| CN107167097A (en) * | 2017-06-01 | 2017-09-15 | 中国航发湖南动力机械研究所 | Corner measuring apparatus |
| CN108519074A (en) * | 2018-04-24 | 2018-09-11 | 中国海底电缆建设有限公司 | A kind of dynamic adhesion formula dip measuring device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205981075U (en) * | 2016-08-17 | 2017-02-22 | 上海新高桥凝诚建设工程检测有限公司 | Rebar mechanical connection connects deformation measurement device for remnant deformation |
| CN115060487A (en) * | 2022-06-24 | 2022-09-16 | 洛阳拖拉机研究所有限公司 | Reed valve detection device and system |
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