CN114777705B - Nuclear power plant water injection tank foundation bolt installation, measurement and inspection method - Google Patents
Nuclear power plant water injection tank foundation bolt installation, measurement and inspection method Download PDFInfo
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- CN114777705B CN114777705B CN202210504097.4A CN202210504097A CN114777705B CN 114777705 B CN114777705 B CN 114777705B CN 202210504097 A CN202210504097 A CN 202210504097A CN 114777705 B CN114777705 B CN 114777705B
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- G—PHYSICS
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention provides a method for measuring and checking installation of foundation bolts of a nuclear power installation water injection tank. The method comprises the following steps: datum point, bolt carrier bottom tooling plate manufacturing, bolt carrier bottom tooling plate erection, bolt carrier bottom tooling plate horizontal cross bar elevation position adjustment, bolt bottom fixing tooling manufacturing, bolt bottom checking tooling manufacturing, bolt bottom fixing tooling fixing, bottom plate steel bar position adjustment, steel bar binding fixing acceptance qualification, bolt insertion, bolt fixing plate adjustment and bolt checking and reinforcing accurate adjustment. The whole method can improve the one-time installation precision and efficiency of the nuclear power bolt, reduce the labor consumption caused by reworking due to the fact that the installation is not in place due to the position obstacle of the steel bar and the like, can quickly and accurately install the bolt in place, improves the construction efficiency, and further can create larger economic and social benefits.
Description
Technical Field
The invention belongs to the field of civil construction, and relates to a nuclear power installation water injection tank foundation bolt installation, measurement and inspection method.
Background
The nuclear power station reactor factory building belongs to a core factory building in the construction of a nuclear power station, and the requirement on the nuclear safety standard is high. The nuclear island factory building inner structure is provided with water injection tank installation equipment, and the water injection tank installation adopts a mode of pre-buried bolt connection. The installation quality of the bolts is the basic assurance of key equipment of the nuclear power station, so that the water injection box embedded foundation bolts are required to be installed and have higher installation accuracy.
At present, bolts are mainly arranged on a circle with the radius of 2460mm and are composed of 24M 56 bolts, the 24 bolts are divided into 3 groups, the bolts are positioned on a layer of-4.550M, a cooling system steel structure water tank module (CB 12 module for short) is arranged in the middle, the elevation is-5.800M, the bolt length is 1960mm, the top elevation is-4.290M, concrete is poured together with a layer of-4.550M material item, and two M56 nuts and a square anchoring block with the thickness of 157 multiplied by 56mm are arranged at the lower part of each bolt. Under the normal condition, the minimum theoretical distance between the two anchoring blocks is only 9.3mm, and the requirements are met according to the design drawing: the central positioning tolerance of 24 embedded bolts is not more than +/-2 mm, the relative central positioning tolerance of a single bolt is not more than +/-2 mm, and the verticality is 1/1000. If the angle position of the anchoring block is incorrect or has larger deviation during installation, the installation accuracy of the bolts is affected.
However, because the steel bars in the actual installation environment are denser, the bolt is installed by adopting the method, the dense steel bars can influence the angle position of the anchor block during installation, and the anchor block is not installed in place, so that the installation accuracy and the construction efficiency of the bolt are lower.
Disclosure of Invention
The invention provides a method for measuring and checking installation of foundation bolts of a nuclear power installation water injection tank, aiming at the defects in the prior art, comprising the following steps:
after the central coordinates of a preset datum point on the middle pool bottom plate are determined, according to the positions of a plurality of preset bolts, a bolt bracket supporting upright rod is lofted out, and before concrete is poured on the lower part of the middle pool bottom plate, the bolt bracket supporting upright rod is inserted;
installing a prefabricated bolt bracket bottom tooling plate on the bolt bracket supporting upright rod; the tooling plate at the bottom of the bolt bracket is an arc strip-shaped steel plate, and the length and the width of the tooling plate are larger than those of the outer edge of a single group of bolts;
paying off and positioning the bottom position of the bolt;
installing a prefabricated bolt bottom fixing tool on the bolt bracket bottom tooling plate according to the bottom position of the bolt positioned by paying off; the bolt bottom fixing tool is of a circular tube structure, and the inner diameter of the bolt bottom fixing tool is matched with the outer diameter of the bolt;
placing a prefabricated bolt bottom checking fixture into the bolt bottom fixing fixture, and determining the detection center coordinates of the bolt bottom fixing fixture, wherein the bolt bottom checking fixture comprises a bolt bottom checking fixture plate and a circular tube arranged in the center of the bolt bottom checking fixture plate;
determining a first position deviation according to the detection center coordinates, the detection base design center coordinates and the rotation angle of the water injection box bolt and the central axis of the reactor;
if the first position deviation is larger than a first preset threshold value, readjusting the position of the bolt bottom fixing tool until the first position deviation is smaller than or equal to the first preset threshold value;
inserting the bolts, and installing prefabricated bolt bracket top tooling plates on the bolt bracket supporting vertical rods, wherein the bolt bracket top tooling plates are arc-shaped long-strip-shaped steel plates, the length and the width of the arc-shaped long-strip-shaped steel plates are larger than those of the outer edges of the single group of bolts, and through holes corresponding to the positions of the bolts are formed in the arc-shaped long-strip-shaped steel plates;
sleeving a prefabricated bolt top checking tool into the top of the bolt, and measuring the center coordinate of the upper opening; the bolt top inspection tool comprises a bolt top inspection tool plate, a round pipe arranged in the center of the bolt top inspection tool plate and a plurality of round steels arranged at the edge of the bolt top inspection tool plate;
and if the second position deviation between the upper port center coordinate and the basic center position of the bolt is larger than a second preset threshold value, readjusting the position of the bolt until the second position deviation is smaller than or equal to the second preset threshold value.
Further, the determining the center coordinates of the preset datum point on the bottom plate of the middle pool includes:
and measuring the center coordinates of preset reference points on the bottom plate of the middle pool according to the corner net method.
Further, install prefabricated bolt carrier bottom frock board on the bolt carrier supports pole setting, include:
according to the bottom elevation of the bolt, determining the top elevation of a horizontal cross rod of a tooling plate at the bottom of the bolt bracket;
the top elevation of the horizontal cross rod of the tooling plate at the bottom of the bolt bracket is measured on the supporting upright rod of the bolt bracket;
paying off a position edge line of the tooling plate at the bottom of the positioning bolt bracket according to the horizontal cross rod of the tooling plate at the bottom of the bolt bracket;
and installing a prefabricated bolt bracket bottom tooling plate according to the position edge line.
Further, determining the detection center coordinates of the bolt bottom fixing tool includes:
inserting a prism rod into a circular tube arranged at the center of the checking tool plate at the bottom of the bolt;
and after leveling the air bubble, measuring to obtain the detection center coordinate of the bolt bottom fixing tool.
Further, the determining the first position deviation according to the detection center coordinates, the detection base design center coordinates, and the rotation angle of the water injection tank bolt and the central axis of the reactor includes:
the first positional deviation is determined by the following formula:
δR＝(X-X 0 )cosα+(Y-Y 0 )sinα-R
δα＝-(X-X 0 )sinα+(Y-Y 0 )cosα
wherein δR and δα are first positional deviations, X 0 、Y 0 For detecting a basic design center coordinate, alpha is a rotation angle of a water injection tank installing bolt and a central axis of a reactor, and R is a radius of a circle where the bolt is arranged.
Further, before performing the inserting of the bolts and installing the prefabricated bolt carrier top tooling plate on the bolt carrier support pole, the method further comprises:
binding, fixing and checking and accepting the steel bars.
Further, the inserting of the bolts and the mounting of prefabricated bolt carrier top tooling plates on the bolt carrier support uprights comprises:
according to the top elevation of the bolt, determining the top elevation of a horizontal cross rod of a tooling plate at the top of the bolt bracket;
the top elevation of the horizontal cross rod of the tooling plate at the top of the bolt bracket is measured on the vertical supporting rod of the bolt bracket;
paying off a position edge line of the top tooling plate of the positioning bolt bracket according to the horizontal cross rod of the top tooling plate of the bolt bracket;
the prism rod is utilized to redetermine the detection center coordinates of the bolt bottom fixing tool, and if the position deviation of the bolt bottom fixing tool is smaller than or equal to the preset threshold value, the bolt is inserted;
and installing a prefabricated bolt bracket top tooling plate, and adjusting the height of the bolt bracket top tooling plate to the upper opening of the horizontal cross rod of the bolt bracket top tooling plate.
Further, the second positional deviation of the upper port center coordinates from the bolt base center position is determined by:
determining the central position of a bolt foundation according to the distances between all single bolts and the center of a circle where the bolts are distributed;
and determining the deviation between the upper opening center coordinate of the bolt and the basic center position of the bolt as a second position deviation.
Further, the readjusting the position of the bolt includes:
and adjusting the position of the bolt as a whole in the direction opposite to the direction of the second positional deviation.
Further, after the position of the bolt meets the preset requirement, the method further comprises:
and carrying out spot welding reinforcement on each structure.
The beneficial effects of the invention are as follows:
1. the installation work efficiency is greatly improved, and the method has scientificity, innovation and practicability while the installation quality is ensured by manufacturing an installation tool and an inspection tool through the pre-buried support frame in combination with the site construction condition;
2. the detection tool reduces the investment of personnel and measurement equipment and achieves the purposes of cost reduction and efficiency enhancement while ensuring the bolt installation precision;
3. according to the actual condition of the site, repeated reworking can be effectively reduced through the sequence of elevation and position adjustment, secondary operation is avoided, labor intensity and workload are reduced, and positioning efficiency and comprehensiveness are improved;
4. the radial and azimuth position checking device effectively solves the problem of checking the radial and azimuth positions of the high-precision bolt, and is flexible and convenient to apply.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a bolt layout;
FIG. 2 is a schematic view of a bolt;
FIG. 3 is a schematic view of a reference point plane structure;
FIG. 4 is a schematic elevation view of a datum point;
FIG. 5 is a schematic view of a tooling plate structure at the bottom of a bolt bracket;
FIG. 6 is a schematic diagram of a bolt bottom fixing tool;
FIG. 7 is a schematic diagram of a bolt bottom fixing tool after installation;
FIG. 8 is a schematic diagram of a planar structure of a bolt bottom inspection tool;
FIG. 9 is a schematic view of an elevation structure of a bolt bottom inspection tool;
FIG. 10 is a schematic view of a planar structure of a mounting bottom tooling plate of a bolt bracket;
FIG. 11 is a schematic view of an elevation structure of a mounting tooling plate at the bottom of a bolt bracket;
FIG. 12 is a schematic view of a planar structure of a bolt carrier top tooling plate and a bolt post-installation;
FIG. 13 is a schematic view of a vertical face structure of a bolt bracket top tooling plate and a bolt after installation;
FIG. 14 is a schematic view of a planar structure of a bolt top inspection tool;
fig. 15 is a schematic structural diagram of an elevation of a bolt top inspection tool.
1-24, bolts, 1-1, nuts, 1-2, bolt anchoring blocks, 25, datum points, 25-1, datum point forced centering plates, 25-2, datum point angle steel, 26, a pool, 27, bolt support supporting uprights, 28, bolt support bottom tooling plate horizontal cross bars, 29, a pull-up reinforcing bar, 30, bolt bottom fixing tools, 31, bolt support bottom tooling plates, 32, bolt top fixing tooling plates, 33, bolt support top tooling plate hole sites, 34, bolt support top tooling plate horizontal cross bars, 35, a base plate foundation, 36, bolt bottom checking tools, 36-1, bolt bottom checking tooling plates, 36-2, 20mm round tubes 20mm high, 37, bolt top checking tools, 37-1, bolt top checking tooling plates, 37-2, 20mm round tubes 20mm high, 37-3 and 30mm phi 6mm round steel, 38, and poured concrete.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to a bolt layout shown in fig. 1, bolts are installed at present, mainly, bolts 1 to 24 are arranged on a circle with the radius of 2460mm and are composed of 24M 56 bolts, the 24 bolts 1 to 24 are divided into 3 groups, the bolts 1 to 24 are positioned on a layer of-4.550M, a cooling system steel structure water tank module (CB 12 module for short) is arranged in the middle, the elevation is-5.800M, the bolt length is 1960mm, the top elevation is-4.290M, concrete is poured together with a layer of-4.550M material item, and two M56 nuts and a square bolt anchoring block with the elevation of 157×157×56mm are arranged at the lower part of each bolt. Specifically, referring to fig. 2 for a schematic structural view of any one of the bolts, the bolt 1 includes a nut 1-1 and a bolt anchoring block 1-2.
Because the reinforcing steel bars in the actual installation environment are denser, the bolts are installed by adopting the method in the prior art, the dense reinforcing steel bars can influence the angle position of the anchor block during installation, and then the anchor block is not installed in place, so that the installation accuracy and the construction efficiency of the bolts are lower. Aiming at the defects in the prior art, referring to fig. 1 to 15, the embodiment of the invention provides a method for measuring and checking the installation of foundation bolts of a nuclear power and electric water injection tank, which specifically comprises the following steps: :
step 1: after the central coordinates of the preset datum points on the middle pool bottom plate are determined, according to the positions of the preset bolts, the bolt support supporting vertical rods are lofted, and before concrete is poured on the lower portion of the middle pool bottom plate, the bolt support supporting vertical rods are inserted.
Illustratively, referring to the structural schematic of the datum point shown in FIGS. 3 and 4, datum point 25 is welded by 4L 50X 5mm datum point angle steels 25-2, is a lattice structure, is 1.2m in height, is 20mm high in top weld, is 100mm radius circular stainless datum point forced centering disk 25-1, is 5/8 inch bolt hole in the center of the device, is 0.3mm centering accuracy, and is spot welded to the floor embedment, or pool steel floor.
Further, the center coordinates of the preset datum points on the intermediate pool floor can be determined by:
and measuring the center coordinates of preset reference points on the bottom plate of the middle pool according to the corner net method.
In addition, the bolt bracket supports the vertical rods (overall) within 500mm in transverse distance and within 800mm in longitudinal direction.
Before the concrete is poured at the lower part of the bottom plate of the middle pool, a bolt bracket supporting vertical rod is inserted, the bolt bracket supporting vertical rod is phi 36 steel bars, the insertion depth is 700mm, and the height is 2700mm.
Step 2: and installing a prefabricated bolt bracket bottom tooling plate on the bolt bracket supporting upright rod.
Wherein, the tooling plate at the bottom of the bolt bracket is an arc strip steel plate, and the length and the width are larger than the outer edge of a single group of bolts, and the specific structure is shown in fig. 5.
Illustratively, the thickness of the bolt carrier bottom tooling plate is 10mm, and the length and width are greater than the outer 50mm of a single set of bolts.
Further, a prefabricated bolt carrier bottom tooling plate can be mounted on the bolt carrier support pole by:
the first step, determining the top elevation of the horizontal cross rod of the tooling plate at the bottom of the bolt bracket according to the bottom elevation of the bolt.
Specifically, the horizontal cross bar of the tooling plate at the bottom of the bolt bracket is L50X 5mm. The top mark height of the horizontal cross bar of the tooling plate at the bottom of the bolt bracket is obtained by-10 mm of the height of the bottom of the bolt, and the height of the test is-4.290-1.960-0.010= -6.260m in an exemplary way.
And secondly, the top elevation of the horizontal cross rod of the tooling plate at the bottom of the bolt bracket is measured on the vertical rod of the bolt bracket support.
Specifically, the upper opening of the horizontal cross rod L50×50X5mm of the tooling plate at the bottom of the bolt bracket is flush with the elevation line, and after spot welding, the top elevation is rechecked, the rechecking precision is 1-3 mm, and the horizontal cross rod elevation is welded after being qualified.
And thirdly, paying off the position side line of the tooling plate at the bottom of the bolt bracket according to the horizontal cross rod of the tooling plate at the bottom of the bolt bracket.
Specifically, the positional accuracy is ±3mm.
And fourthly, installing prefabricated bottom tooling plates of the bolt brackets according to the position side lines.
Specifically, the position adjustment precision is +/-3 mm, and the welding is fixed.
Step 3: and paying off the bottom position of the positioning bolt.
Step 4: and installing the prefabricated bolt bottom fixing tool on the bolt bracket bottom tooling plate according to the bottom position of the bolt positioned by paying off.
The fixed frock in bolt bottom is pipe structure, and internal diameter and the external diameter of bolt cooperate, and specific structure is see fig. 6.
Illustratively, the bolt bottom fixing tool is a circular tube with the height of 10mm, the inner diameter of 56mm and the thickness of 3mm.
Specifically, a schematic diagram of the bolt bottom fixing tool obtained by installing the bolt bottom fixing tool on the bolt bracket bottom tooling plate after installation is specifically shown in fig. 7.
Step 5: and (3) putting the prefabricated bolt bottom inspection tool into the bolt bottom fixing tool, and determining the detection center coordinates of the bolt bottom fixing tool by utilizing the prism rod.
The bolt bottom checking fixture comprises a bolt bottom checking fixture plate and a circular tube arranged in the center of the bolt bottom checking fixture plate, and specific structures are shown in fig. 8 and 9.
Illustratively, the bolt bottom inspection tool is a phi 56mm circular plate, the thickness is 3mm, a phi 20 x 2mm circular tube is welded at the center position, and the circular tube is vertical to the plate surface.
Specifically, the detection center coordinates of the bolt bottom fixing tool are determined by utilizing the prism rod, and the detection center coordinates can be realized by the following steps:
first, the prism rod is inserted into a circular tube arranged at the center of the checking tool plate at the bottom of the bolt.
And secondly, after leveling the air bubble, measuring to obtain the detection center coordinate of the bolt bottom fixing tool.
Illustratively, bolt number 1 detection center coordinates are (3264.5989, 2990.8294).
Step 6: and determining a first position deviation according to the detection center coordinate, the detection base design center coordinate and the rotation angle of the water injection box bolt and the central axis of the reactor.
Specifically, the first positional deviation may be determined by the following formula:
δR＝(X-X 0 )cosα+(Y-Y 0 )sinα-R
δα＝-(X-X 0 )sinα+(Y-Y 0 )cosα
wherein δR and δα are first positional deviations, X 0 、Y 0 For detecting a basic design center coordinate, alpha is a rotation angle of a water injection tank installing bolt and a central axis of a reactor, and R is a radius of a circle where the bolt is arranged.
Illustratively, bolt number 1 is 16 °, the detection base center coordinates are (3262.230, 2990.150), δr= (3264.5989-3262.230) ×cos 16+(2990.8294-2990.150) ×sin16 ° -2.460 = 0.0044, δα= - (3264.5989-3262.230) ×sin 16+(2990.8294-2990.150) ×cos 16+=0.0001.
Step 7: if the first position deviation is larger than a first preset threshold value, the position of the bolt bottom fixing tool is readjusted until the first position deviation is smaller than or equal to the first preset threshold value.
For example, the bolt 1 detection center coordinates were measured (3264.5938, 2990.8284) after the current movement by 4mm in the center radial direction, and δr= (3264.5938-3262.230) ×cos 16++ (2990.8284-2990.150) ×sin16 ° -2.460= -0.0008, δα= - (3264.5938-3262.230) ×sin 16++ (2990.8284-2990.150) ×cos16 ° =0.0006 were calculated. Meets the requirements.
The structural schematic diagram of the bolt bracket bottom tooling plate after installation is shown in fig. 10 and 11.
In addition, before executing step 8, the method provided by the embodiment of the present invention further includes:
binding, fixing and checking and accepting the steel bars.
Step 8: and inserting bolts, and installing prefabricated bolt bracket top tooling plates on the bolt bracket supporting vertical rods.
The top tooling plate of the bolt bracket is an arc strip-shaped steel plate, the length and the width of the top tooling plate are larger than those of the outer edges of a single group of bolts, and through holes corresponding to the positions of the bolts are formed in the arc strip-shaped steel plate.
Illustratively, the top tooling plate of the bolt bracket is an arc strip steel plate, the thickness is 10mm, the length and the width are larger than those of the outer 50mm of a single group of bolts, the bolts are perforated according to the positions of the bolts, and the bolt holes are phi 62mm.
Further, the bolt may be inserted and a prefabricated bolt carrier top tooling plate may be installed on the bolt carrier support pole by:
the first step, determining the top elevation of the horizontal cross rod of the top tooling plate of the bolt bracket according to the top elevation of the bolt.
Specifically, the horizontal cross bar of the top tooling plate of the bolt bracket is phi 36 steel bar. The top mark height of the horizontal cross bar of the bolt bracket top tooling plate is obtained by the top elevation of the bolt of-200 mm, and is exemplified by-4.290-0.200= -4.490m.
And secondly, the top elevation of the horizontal cross rod of the top tooling plate of the bolt bracket is measured on the vertical rod of the bolt bracket support.
The upper opening of the horizontal cross rod of the top tooling plate of the bolt bracket is flush with the elevation line, and after spot welding, the top elevation is rechecked, the rechecking precision is +/-1 mm, and the horizontal cross rod is welded after the elevation is qualified.
And thirdly, paying off the position side line of the top tooling plate of the positioning bolt bracket according to the horizontal cross rod of the top tooling plate of the bolt bracket.
Specifically, the positional accuracy is ±2mm.
And fourthly, determining the detection center coordinates of the bolt bottom fixing tool again by utilizing the prism rod, and inserting the bolt if the position deviation of the bolt bottom fixing tool is smaller than or equal to a preset threshold value.
Specifically, the prism rod is utilized to redetermine the detection center coordinates of the bolt bottom fixing tool, namely, the bolt bottom checking tool is put into the bottom bolt fixing tool, and the detection center coordinates of the tool are measured by the lengthened prism rod.
Illustratively, the measurements are shown in the following table:
and if the test is qualified, inserting a bolt.
And fifthly, installing a prefabricated bolt bracket top tooling plate, and adjusting the height of the bolt bracket top tooling plate to the upper opening of the horizontal cross rod of the bolt bracket top tooling plate.
Specifically, a tooling plate at the top of the bolt bracket is sleeved into the upper opening of the bolt.
The position adjustment precision of the tooling plate at the top of the bolt bracket is +/-2 mm, and the bolt bracket is welded and fixed.
The schematic structural diagram of the bolt bracket top tooling plate and the bolt after installation is shown in fig. 12 and 13.
Step 9: and sleeving a prefabricated bolt top checking tool into the top of the bolt, and measuring the center coordinate of the upper outlet.
The bolt top checking fixture comprises a bolt top checking fixture plate, a circular tube arranged in the center of the bolt top checking fixture plate and a plurality of round steels arranged at the edge of the bolt top checking fixture plate, and the concrete structure is shown in fig. 14 and 15.
Illustratively, the bolt top inspection tool is a phi 56mm circular plate, the thickness is 3mm, a phi 20 x 2mm circular tube is welded at the center position, the circular tube is vertical to the plate surface, and round steel with the length of 30mm and phi 6mm is welded at the four directions of the circular plate downwards.
Specifically, the bolt position is adjusted and fixed by a triangular wedge at the hole position of the bracket tooling plate, the steps are the same as those of the steps 5 to 7, and the verticality calculation is obtained by subtracting the upper and lower measured values until the standard is met.
Illustratively, the measurements are shown in the following table:
step 10: if the second position deviation between the upper port center coordinate and the bolt basic center position is larger than a second preset threshold value, the position of the bolt is readjusted until the second position deviation is smaller than or equal to the second preset threshold value.
Specifically, the second positional deviation of the upper port center coordinates from the bolt base center position may be determined by:
and determining the basic center position of the bolts according to the distances between all the single bolts and the center of the circle where the bolts are distributed.
And determining the deviation between the upper opening center coordinates of the bolts and the basic center positions of the bolts as second position deviation.
Further, the bolt base center position may be determined using computing software. Illustratively, the bolt base center locations are shown in the following table:
from the data of the above two tables, δx= 3262.2298-3262.230 = -0.0002, δy= 2990.1505-2990.1500 =0.0005, and center deviation=sqrt ((-0.0002) 2+0.00052) =0.0005, less than ±2mm are calculated, thus satisfying the requirements.
In addition, the position of the bolt can be readjusted in the following manner,
the position of the bolt is integrally adjusted in the opposite direction to the direction of the second positional deviation.
After executing step 10, after the position of the bolt meets the preset requirement, the method provided by the embodiment of the invention further includes: and carrying out spot welding reinforcement on each structure.
The beneficial effects of the invention are as follows:
1. the installation work efficiency is greatly improved, and the method has scientificity, innovation and practicability while the installation quality is ensured by manufacturing an installation tool and an inspection tool through the pre-buried support frame in combination with the site construction condition;
2. the detection tool reduces the investment of personnel and measurement equipment and achieves the purposes of cost reduction and efficiency enhancement while ensuring the bolt installation precision;
3. according to the actual condition of the site, repeated reworking can be effectively reduced through the sequence of elevation and position adjustment, secondary operation is avoided, labor intensity and workload are reduced, and positioning efficiency and comprehensiveness are improved;
4. the radial and azimuth position checking device effectively solves the problem of checking the radial and azimuth positions of the high-precision bolt, and is flexible and convenient to apply.
The invention has been described in detail in connection with the specific embodiments and exemplary examples thereof, but such description is not to be construed as limiting the invention. It will be understood by those skilled in the art that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, and these fall within the scope of the present invention. The scope of the invention is defined by the appended claims.
Claims (5)
1. The utility model provides a nuclear power plant water injection tank foundation bolt installation measurement inspection method, includes datum point, bolt carrier bottom frock board, the fixed frock of bolt bottom, bolt bottom inspection frock, bolt carrier top frock board, bolt top inspection frock, its characterized in that includes:
after the central coordinates of a preset datum point on the middle pool bottom plate are determined, according to the positions of a plurality of preset bolts, a bolt bracket supporting upright rod is lofted out, and before concrete is poured on the lower part of the middle pool bottom plate, the bolt bracket supporting upright rod is inserted;
installing a prefabricated bolt bracket bottom tooling plate on the bolt bracket supporting upright rod; the tooling plate at the bottom of the bolt bracket is an arc strip-shaped steel plate, and the length and the width of the tooling plate are larger than those of the outer edge of a single group of bolts;
paying off and positioning the bottom position of the bolt;
installing a prefabricated bolt bottom fixing tool on the bolt bracket bottom tooling plate according to the bottom position of the bolt positioned by paying off; the bolt bottom fixing tool is of a circular tube structure, and the inner diameter of the bolt bottom fixing tool is matched with the outer diameter of the bolt;
placing a prefabricated bolt bottom checking fixture into the bolt bottom fixing fixture, and determining the detection center coordinates of the bolt bottom fixing fixture, wherein the bolt bottom checking fixture comprises a bolt bottom checking fixture plate and a circular tube arranged in the center of the bolt bottom checking fixture plate;
according to the detection center coordinates, the detection base design center coordinates and the rotation angle of the water injection box bolt and the central axis of the reactor, determining a first position deviation:
δR=(X-X 0 )cosα+(Y-Y 0 )sinα-R；
δα=-(X-X 0 )sinα+(Y-Y 0 )cosα；
wherein δR and δα are first positional deviations, X 0 、Y 0 For detecting a basic design center coordinate, alpha is a rotation angle of a bolt for installing the water injection tank and a central axis of the reactor, and R is a radius of a circle where the bolt is arranged;
if the first position deviation is larger than a first preset threshold value, readjusting the position of the bolt bottom fixing tool until the first position deviation is smaller than or equal to the first preset threshold value;
inserting the bolts, and installing prefabricated bolt bracket top tooling plates on the bolt bracket supporting vertical rods, wherein the bolt bracket top tooling plates are arc-shaped long-strip-shaped steel plates, the length and the width of the arc-shaped long-strip-shaped steel plates are larger than those of the outer edges of the single group of bolts, and through holes corresponding to the positions of the bolts are formed in the arc-shaped long-strip-shaped steel plates;
sleeving a prefabricated bolt top checking tool into the top of the bolt, and measuring the center coordinate of the upper opening; the bolt top inspection tool comprises a bolt top inspection tool plate, a round pipe arranged in the center of the bolt top inspection tool plate and a plurality of round steels arranged at the edge of the bolt top inspection tool plate;
if the second position deviation between the upper port center coordinate and the basic center position of the bolt is larger than a second preset threshold value, readjusting the position of the bolt until the second position deviation is smaller than or equal to the second preset threshold value;
wherein install prefabricated bolt carrier bottom frock board in bolt carrier supports pole setting, include:
according to the bottom elevation of the bolt, determining the top elevation of a horizontal cross rod of a tooling plate at the bottom of the bolt bracket;
the top elevation of the horizontal cross rod of the tooling plate at the bottom of the bolt bracket is measured on the supporting upright rod of the bolt bracket;
paying off a position edge line of the tooling plate at the bottom of the positioning bolt bracket according to the horizontal cross rod of the tooling plate at the bottom of the bolt bracket;
installing a prefabricated bolt bracket bottom tooling plate according to the position edge line;
the determining the detection center coordinates of the bolt bottom fixing tool comprises the following steps:
inserting a prism rod into a circular tube arranged at the center of the checking tool plate at the bottom of the bolt;
measuring to obtain the detection center coordinates of the bolt bottom fixing tool after leveling the air bubbles;
the bolt is inserted, and a prefabricated bolt bracket top tooling plate is arranged on the bolt bracket supporting upright rod, and the bolt bracket top tooling plate comprises:
according to the top elevation of the bolt, determining the top elevation of a horizontal cross rod of a tooling plate at the top of the bolt bracket;
the top elevation of the horizontal cross rod of the tooling plate at the top of the bolt bracket is measured on the vertical supporting rod of the bolt bracket;
paying off a position edge line of the top tooling plate of the positioning bolt bracket according to the horizontal cross rod of the top tooling plate of the bolt bracket;
the prism rod is utilized to redetermine the detection center coordinates of the bolt bottom fixing tool, and if the position deviation of the bolt bottom fixing tool is smaller than or equal to the preset threshold value, the bolt is inserted;
installing a prefabricated bolt bracket top tooling plate, and adjusting the height of the bolt bracket top tooling plate to the upper opening of the horizontal cross rod of the bolt bracket top tooling plate;
the second position deviation of the upper port center coordinate and the bolt basic center position is determined by the following mode:
determining the central position of a bolt foundation according to the distances between all single bolts and the center of a circle where the bolts are distributed;
and determining the deviation between the upper opening center coordinate of the bolt and the basic center position of the bolt as a second position deviation.
2. The method of claim 1, wherein determining the center coordinates of a predetermined datum point on the intermediate pond floor comprises:
and measuring the center coordinates of preset reference points on the bottom plate of the middle pool according to the corner net method.
3. The method of claim 1, wherein prior to performing the inserting of the bolts and installing a prefabricated bolt carrier top tooling plate on the bolt carrier support pole, the method further comprises:
binding, fixing and checking and accepting the steel bars.
4. The method of claim 1, wherein the readjusting the position of the bolt comprises:
and adjusting the position of the bolt as a whole in the direction opposite to the direction of the second positional deviation.
5. The method of claim 1, wherein after the position of the bolt meets a preset requirement, the method further comprises:
and carrying out spot welding reinforcement on each structure.
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| CN114777705A (en) | 2022-07-22 |
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