CN109520475B - Levelness measuring and calculating method in reactor internals installation process - Google Patents

Levelness measuring and calculating method in reactor internals installation process Download PDF

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CN109520475B
CN109520475B CN201811635774.6A CN201811635774A CN109520475B CN 109520475 B CN109520475 B CN 109520475B CN 201811635774 A CN201811635774 A CN 201811635774A CN 109520475 B CN109520475 B CN 109520475B
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measuring
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林宝明
王进
刘元庆
李松
李雨航
杨哲宇
卢谋芝
王绍堂
赵若愚
刘佳冰
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China General Nuclear Power Corp
CGN Power Co Ltd
Yangjiang Nuclear Power Co Ltd
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Yangjiang Nuclear Power Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels

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Abstract

A levelness measuring and calculating method in the installation process of a reactor internals comprises the following steps: s1, arranging a level: adjusting a level gauge, determining a supposed elevation point in a reactor pool, and reading the supposed elevation point elevation through a leveling rod; s2, measuring the elevation of the internals: respectively taking 3 measuring points at intervals of 120 degrees or respectively taking 4 measuring points at intervals of 90 degrees on the outer circumference of the circular plane at the lower end of the in-pile member, and reading the elevation numerical value of each measuring point through a leveling rod; s3, calibration: after the elevation measurement of the internal member is finished, retesting the assumed elevation point by using a level gauge, wherein the elevation reading of the measured assumed elevation point is consistent with the measurement value in the step S1, and the elevation data of the measurement point of the internal member at this time is valid; s4, calculating the levelness of the internals: and calculating the lower levelness of the internals according to the measured elevation data of 3 or 4 points of S3. The invention solves the technical problem that the levelness measured by the prior art is smaller.

Description

Levelness measuring and calculating method in reactor internals installation process
Technical Field
The invention relates to the field of levelness measurement of in-pile components and similar equipment, in particular to a levelness measurement and calculation method in the installation process of in-pile components.
Background
The levelness adjustment precision of the reactor internals directly influences the safety of subsequent hoisting of the internals in the reactor, so that the levelness adjustment precision is very important. Referring to the installation and adjustment procedure of the internal components, namely 'installation and adjustment of the upper and lower internal components', the levelness of the internal components is required to be measured for many times in the installation and adjustment process of the internal components.
1. When the lower reactor core component is positioned on the storage rack, checking and adjusting the levelness of the lower surface of the reactor core supporting plate;
2. directly measuring the levelness of the lower surface of the reactor core supporting plate when the lower reactor core component is hung below the reactor core component hanger, and adjusting the levelness to be within 1.5 mm;
3. when the upper in-pile component is positioned on the storage rack, the levelness of an upper flange of the upper in-pile component is checked;
4. the upper reactor internals are firstly loaded into a pressure vessel, and the levelness is measured in a hoisting state;
5. when the subsequent upper in-pile component is lifted, whenever the equipment state is changed (namely, a part is installed or removed), the lifting levelness is measured, and before and after cold test, data is submitted to a designer for evaluation in times, and when the data is reported, the equipment state is required to be described;
6. connecting the reactor core internal member hanger with the lower reactor core internal member, hanging the lower reactor core internal member from the pressure vessel, placing the lower reactor core internal member on a storage rack provided with a heightened support frame, and controlling the surface levelness of the heightened support frame to be within the lower surface levelness of the reactor core support plate; description of the drawings: the normal levelness should be in mm/m, but is in mm in the program, and we default the "levelness" in the program to mean the maximum height deviation value measured at each point on the lower surface of the core support plate or the flange surface of the component.
Disclosure of Invention
The invention aims to provide a levelness measuring and calculating method in the installation process of in-pile members, and aims to solve the technical problem that levelness measured in the prior art is small.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a levelness measuring and calculating method in the installation process of a reactor internals is characterized by comprising the following steps:
s1, arranging a level: adjusting a level gauge, determining a supposed elevation point on a reactor pool, arranging a leveling rod on the supposed elevation point, and reading the supposed elevation point elevation through the leveling rod;
s2, measuring the elevation of the internals: respectively taking 3 measuring points which are H, X and Y at intervals of 120 degrees on the outer circumference of the circular plane at the lower end of the in-pile member, or respectively taking 4 measuring points which are H ', X', Y 'and Z' at intervals of 90 degrees, and reading the elevation value of each measuring point through a leveling rod;
s3, calibration: after the elevation measurement of the internal member is finished, retesting the assumed elevation point by using a level gauge, wherein the elevation reading of the measured assumed elevation point is consistent with the measurement value in the step S1, and the elevation data of the measurement point of the internal member at this time is valid;
and S4, calculating the levelness of the internal member, namely calculating the levelness of the internal member according to the measured elevation data of 3 or 4 points in S3.
Further preferably, in step S2, when measuring 3 elevation data, assuming that the elevation data of 3 measurement points H, X and Y are H, x, and Y, respectively, and H is greater than or equal to Y, assuming that point a is the highest point of the entire outer circumference, the elevation value is a, point B is the lowest point of the entire outer circumference, and the elevation value is B, the connection line a and B must pass through the center of a circle, CY and HD are the connection lines passing through the center of a circle, a must be between the arc segments H and C, and B must be between the arc segments D and Y, the included angle between AB and HY is set as α, α has positive and negative components, clockwise is positive, and counterclockwise is negative.
Further, the difference in the elevation of a and B is calculated as follows. For an inclined plane, the elevation difference between any two points in the plane is proportional to the projection of the two points in the AB direction, the coefficient is set as k, and the elevation difference between A and B is calculated as follows:
assuming that the outer circumference radius is: r, line segment AB has a length of 2R, straight line HY, XY has a length of
Figure GDA0002977150570000021
A. B height difference a-B ═ 2R · k
Then the height difference of h and y
Figure GDA0002977150570000031
Difference in elevation of x and y
Figure GDA0002977150570000032
Figure GDA0002977150570000033
Figure GDA0002977150570000034
h-2x+y＝3R·k·sina
Figure GDA0002977150570000035
Figure GDA0002977150570000036
Figure GDA0002977150570000037
Due to the fact that
Figure GDA0002977150570000038
Figure GDA0002977150570000039
Figure GDA00029771505700000310
In addition, in step S2, when measuring 4 pieces of elevation data, assuming that the elevation data of 4 measurement points H ', X ', Y ', and Z ' are H ', X ', Y ', and Z ', respectively, assuming that the point a ' is the highest point of the entire circumferential surface, the elevation value of the point is a ', the point B ' is the lowest point of the entire circumferential surface, the elevation value of the point is B ', the line connecting the points a ' B ' is certainly over the center of the circle, the angle between the straight line a ' B ' and the straight line Y ' H ' is α ', the perpendicular lines of the points a ' B ' are made through the four points H ', X ', Y ', and Z ', respectively, and the relationship between the elevation values of the four points is: h '≧ x' > z '≧ y'.
More preferably, the elevation difference between the point a 'and the point B' is calculated by the following method, the elevation difference between the point a 'and the point B' is proportional to the projection of a straight line formed by connecting the point a 'and the point B' on the point a 'B', the scaling coefficient is set to be k, and the calculation method of the elevation difference between the point a 'and the point B' is as follows:
the outer circumference radius is R, the length of the line segment A 'B' is 2R
The difference of the elevation of A ' and B ' is a ' -B ═ 2R · k
h ', y' height difference h '-y ═ 2R · cos α' · (1)
x 'and z' difference in elevation x '-z ═ 2R · sin α' · (2)
The following formulae (1) and (2) give:
Figure GDA0002977150570000041
at the same time
Figure GDA0002977150570000042
Therefore, it is not only easy to use
Figure GDA0002977150570000043
The implementation of the invention can achieve the following beneficial effects:
compared with the traditional method, the levelness measuring and calculating method in the installation process of the reactor internals has accurate measuring and calculating results
Drawings
FIG. 1 is a schematic diagram of the position relationship of a level, a reactor pool and a reactor internals according to the present invention;
FIG. 2 is a schematic structural view of a trisection point of the outer circumference of the lower end of the internals according to the present invention;
FIG. 3 is a schematic structural view of the quartering points of the outer circumference of the lower end of the internals according to the present invention.
Detailed description of the embodiments reference is made to the accompanying drawings in which:
1-a reactor pool; 2-elevation point; 3-leveling rod; 4-internals; 6-level gauge.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
A levelness measuring and calculating method in the installation process of a reactor internals comprises the following steps:
s1, arranging a level: adjusting a level gauge 6, determining a supposed elevation point 2 on the reactor pool 1, arranging a leveling rod 3 on the supposed elevation point 2, and reading the elevation of the supposed elevation point 2 through the leveling rod 3;
s2, measuring the elevation of the internals 4: respectively taking 3 measuring points which are H, X and Y at intervals of 120 degrees on the outer circumference of the circular plane at the lower end of the in-pile member 4, or respectively taking 4 measuring points which are H ', X', Y 'and Z' at intervals of 90 degrees, and reading the elevation value of each measuring point through the leveling rod 3;
in step S2, when measuring 3 elevation data, assuming that the elevation data of 3 measurement points H, X and Y are H, x, and Y, respectively, and H is not less than x and not less than Y, assuming that point a is the highest point of the entire outer circumference, the elevation value is a, point B is the lowest point of the entire outer circumference, and the elevation value is B, the connection line a and B must cross the center of a circle, CY and HD are the connection lines crossing the center of a circle, a must be between the arc segments H and C, and B must be between the arc segments D and Y, setting the included angle between AB and HY as α, α has positive and negative components, clockwise is positive, and counterclockwise is negative; for an inclined plane, the elevation difference of any two points in the plane is calculated by the following method, the elevation difference is in direct proportion to the projection of the two points in the AB direction, the coefficient is set as k, and the elevation difference between A and B is calculated by the following method:
assuming that the outer circumference radius is: r, line segment AB has a length of 2R, straight line HY, XY has a length of
Figure GDA0002977150570000051
A. B height difference a-B ═ 2R · k
Then the height difference of h and y
Figure GDA0002977150570000061
Difference in elevation of x and y
Figure GDA0002977150570000062
Figure GDA0002977150570000063
Figure GDA0002977150570000064
h-2x+y＝3R·k·sina
Figure GDA0002977150570000065
Figure GDA0002977150570000066
Figure GDA0002977150570000067
Due to the fact that
Figure GDA0002977150570000068
Figure GDA0002977150570000069
Figure GDA00029771505700000610
In step S2, when measuring 4 elevation data, assuming that the elevation data of 4 measurement points H ', X ', Y ', and Z ' are H ', X ', Y ', and Z ', respectively, assuming that the point a ' is the highest point of the entire circumferential surface, the elevation value of the point is a ', the point B ' is the lowest point of the entire circumferential surface, the elevation value of the point is B ', the line a ' B ' necessarily passes through the center of the circle, the included angle between the straight line a ' B ' and the straight line Y ' H ' is α ', the perpendicular lines a ' B ' are respectively made by passing through the four points H ', X ', Y ', and Z ', and the relationship between the elevation values of the four points is: h 'is ≧ x' is ≧ z 'is ≧ y'.
The elevation difference between the point A 'and the point B' is calculated by adopting the following method, the elevation difference of the point A 'and the point B' is in direct proportion to the projection of a straight line formed by connecting the point A 'and the point B' on the point A 'B', the proportional coefficient is set to be k, and the calculation mode of the elevation difference of the point A 'and the point B' is as follows:
the outer circumference radius is R, the length of the line segment A 'B' is 2R
The difference of the elevation of A ' and B ' is a ' -B ═ 2R · k
h ', y' height difference h '-y ═ 2R · cos α' · (1)
x 'and z' difference in elevation x '-z ═ 2R · sin α' · (2)
The following formulae (1) and (2) give:
Figure GDA0002977150570000071
at the same time
Figure GDA0002977150570000072
Therefore, it is not only easy to use
Figure GDA0002977150570000073
S3, calibration: after the elevation measurement of the internal member 4 is finished, the supposed elevation point 2 is retested by using the level gauge 6, and the elevation reading of the supposed elevation point 2 is consistent with the measurement value in the step S1, so that the elevation data of the measurement point of the internal member 4 is valid;
s4, calculating the levelness of the internals: and calculating the lower levelness of the internals according to the measured elevation data of 3 or 4 points of S3.
The traditional measurement method comprises the following steps:
according to the height measurement value of 3 points uniformly distributed at intervals of 120 degrees in the circumference, if h is more than or equal to x and more than or equal to y, the value of h-y is taken as the 'levelness';
respectively calculating the height difference value h '-y', x '-z' of the diagonal marks according to the height measurement values of four points uniformly distributed at intervals of 90 degrees in the circumference, and if (h '-y') > (x '-z'), taking h '-y' as the horizontal degree;
the maximum elevation deviation calculated by the height measurement values h, x and y of three points uniformly distributed at intervals of 120 degrees in the circumference is as follows:
Figure GDA0002977150570000081
if a-b is h-y, (a-b)2＝(h-v)2
Figure GDA0002977150570000082
Because (h-y)2≥0，(h-2x+y)2≥0
So that h-y is 0 and h-2x + y is 0
Because h is more than or equal to x is more than or equal to y
So h is x is y
I.e. h-y is equal to a-b only if h-x-y is otherwise smaller than a-b.
The maximum elevation deviation calculated from the height measurements h, x ', y ', z ' of four points spaced 90 ° apart within the circumference is:
Figure GDA0002977150570000083
if a '-b' -h '-y' is satisfied, x '-z' is 0.
I.e. when x 'is equal to z', then h '-y' is equal to h '-y', and the rest h '-y' is smaller than a '-b'.
Compared with the traditional calculation and measurement mode, the measurement method provided by the invention is more accurate.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (1)

1. A levelness measuring and calculating method in the installation process of a reactor internals is characterized by comprising the following steps:
s1, arranging a level: adjusting a level gauge (6), determining a supposed elevation point (2) in a reactor pool (1), and reading the elevation of the supposed elevation point (2) through a leveling rod (3) arranged on a reactor internal member (4);
s2, measuring the elevation of the internals (4): respectively taking 3 measuring points which are H, X and Y at intervals of 120 degrees on the outer circumference of the circular plane at the lower end of the in-pile member (4), or respectively taking 4 measuring points which are H ', X', Y 'and Z' at intervals of 90 degrees, and reading the elevation value of each measuring point through the leveling rod (3);
s3, calibration: after the elevation measurement of the internal member (4) is finished, the leveling instrument (6) is used for retesting the assumed elevation point (2), and the elevation reading of the measured assumed elevation point (2) is consistent with the measurement value in the step S1, so that the elevation data of the measurement point of the internal member (4) is valid;
s4, calculating the levelness of the internal member, namely calculating the lower levelness of the internal member according to the measured elevation data of 3 or 4 points in S3;
in step S2, when measuring 3 elevation data, the elevation data of 3 measuring points H, X and Y measured by the leveling rod (3) are h, x, Y, respectively, and h is not less than x and not less than Y, point a is the highest point of the whole outer circumference, the elevation value is a, point B is the lowest point of the whole outer circumference, the elevation value is B, the connecting line a and B must pass through the center of a circle, CY and HD are connecting lines passing through the center of a circle, a is between arc segments H, C, B is between arc segments D, Y, the included angle between AB and HY is set as α, α has positive and negative fractions, clockwise is positive, and counterclockwise is negative;
the elevation difference between A, B and k is calculated A, B by calculating the elevation difference between any two points in the plane for an inclined plane, wherein the elevation difference is proportional to the projection of the two points in the direction AB, and the coefficient is set as follows:
let the radius of the outer circumference be R, the length of the line segment AB be 2R, and the lengths of the straight lines HY and XY be
Figure FDA0002977150560000011
A. B height difference a-B ═ 2R · k
Then the height difference of h and y
Figure FDA0002977150560000021
Difference in elevation of x and y
Figure FDA0002977150560000022
Figure FDA0002977150560000023
Figure FDA0002977150560000024
h-2x+y＝3R·k·sinα
Figure FDA0002977150560000025
Figure FDA0002977150560000026
Figure FDA0002977150560000027
Due to the fact that
Figure FDA0002977150560000028
Figure FDA0002977150560000029
Figure FDA00029771505600000210
Or in step S2, when measuring 4 elevation data, the elevation data of 4 measurement points H ', X', Y ', and Z' measured by the leveling rod (3) are H ', X', Y ', and Z', respectively, the point a 'is the highest point of the entire circumferential surface, the point a' is the lowest point of the entire circumferential surface, the point B 'is B', the line connecting a 'B' is bound to pass through the center of circle, the included angle between the line a 'B' and the line Y 'H' is α ', the perpendicular lines between H', X ', Y', and Z 'are made to a' B 'respectively, the angle α' is 0 ° < 45 °, and the relationship between the elevation values of the four points is: h 'is more than or equal to x', more than or equal to z ', and more than or equal to y';
the elevation difference between the point A 'and the point B' is calculated by adopting the following method, the elevation difference of the point A 'and the point B' is in direct proportion to the projection of a straight line formed by connecting the point A 'and the point B' on the point A 'B', the proportional coefficient is set to be k, and the calculation mode of the elevation difference of the point A 'and the point B' is as follows:
the outer circumference radius is R, the length of the line segment A 'B' is 2R
The difference of the elevation of A ' and B ' is a ' -B ═ 2R · k
h ', y' height difference h '-y ═ 2R · cos α' · (1)
x 'and z' difference in elevation x '-z ═ 2R · sin α' · (2)
The following formulae (1) and (2) give:
Figure FDA0002977150560000031
at the same time
Figure FDA0002977150560000032
Therefore, it is not only easy to use
Figure FDA0002977150560000033
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CN205940544U (en) * 2016-06-30 2017-02-08 中国电建集团中南勘测设计研究院有限公司 Levelling rod and foundation ring levelness measurement system

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Publication number Priority date Publication date Assignee Title
CN202648655U (en) * 2012-07-12 2013-01-02 湘电风能有限公司 Wind generating set foundation ring levelness measurement device
CN104034307A (en) * 2014-06-27 2014-09-10 天津二十冶建设有限公司 Rapid levelness aligning method for large-size equipment
CN205333053U (en) * 2016-01-09 2016-06-22 长安大学 Automatic right formula surveyor's level measurment scale
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