CN107345452B - Nuclear power station steel containment vessel top head assembling support - Google Patents
Nuclear power station steel containment vessel top head assembling support Download PDFInfo
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- CN107345452B CN107345452B CN201710525784.3A CN201710525784A CN107345452B CN 107345452 B CN107345452 B CN 107345452B CN 201710525784 A CN201710525784 A CN 201710525784A CN 107345452 B CN107345452 B CN 107345452B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
- E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/32—Arched structures; Vaulted structures; Folded structures
- E04B1/3211—Structures with a vertical rotation axis or the like, e.g. semi-spherical structures
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C21/00—Apparatus or processes specially adapted to the manufacture of reactors or parts thereof
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/32—Arched structures; Vaulted structures; Folded structures
- E04B2001/3235—Arched structures; Vaulted structures; Folded structures having a grid frame
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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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- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention belongs to the technical field of nuclear power station construction. The invention discloses a steel containment vessel top head assembling support for a nuclear power station, aiming at solving the problems that the construction cost of the support is high and the operation space in the support is narrow when a top head is assembled by adopting a supporting device in the prior art. The assembly bracket comprises an edge bracket and an inner bracket; the edge support is fixedly connected with the ground according to the radius of the lower opening of the top seal head; the inner support is fixedly connected with the ground according to the projection positions of the middle-bottom steel plate, the middle-lower steel plate and the middle-upper steel plate of the top head on the ground, and the height of the inner support corresponds to the height of the corresponding steel plate supporting point position. The assembling support provided by the invention has the advantages that the structure is simple and optimized, the use amount of assembling support materials is reduced, the construction cost is reduced, the deformation amount in the assembling process of the top head is controlled by accurately positioning the fixing position of the support, and the assembling quality of the top head is ensured.
Description
Technical Field
The invention belongs to the technical field of nuclear power station construction, and particularly relates to a steel containment vessel top head assembling support for a nuclear power station.
Background
The steel containment vessel is a special nuclear secondary device in third-generation nuclear power, and the third-generation nuclear power using the steel containment vessel mainly comprises AP1000, CAP1000 and CAP1400 at present. Referring to fig. 1, a top head 10 in a steel containment vessel is a large-sized oval head and is formed by splicing four layers of steel plates, and each layer of steel plate is composed of a plurality of arc-shaped steel plates. The bottom steel plate 11, the middle-lower steel plate 12, the middle-upper steel plate 13 and the top steel plate 14 are arranged in sequence along the direction that the edge position of the top head 10 points to the center.
At present, for the construction of a top head in a steel containment vessel, firstly, the ground assembly of the top head is carried out, each layer of steel plates are assembled and welded to form a whole, and then the top head is hoisted integrally to complete the assembly of the containment vessel. According to the design requirement of the top head, when the top head is assembled, the maximum deformation of each steel plate is required to be not more than the thickness of the steel plate, and therefore, in order to control the deformation of the steel plates and ensure the assembly quality, a corresponding assembly support needs to be erected.
The invention discloses an assembly bracket shown in fig. 2 in a Chinese patent with the application number of 201210178042.5 and the name of a special supporting device for a nuclear island steel containment vessel top head and a transportation method. In the patent, the deformation amount of the steel plate in the process of assembling the top head is controlled by arranging the inner supporting structure, the secondary outer supporting structure and the outer supporting structure. However, the assembly bracket disclosed in this patent is assembled by using a large number of longitudinal bars, radial cross bars, and connecting bars, and the total weight reaches 460 tons. Therefore, the using amount of the support material is greatly increased, the construction cost is improved, and the requirement on the loading capacity of the transport vehicle is extremely high in the transportation process. In addition, the structure of the assembling support is complex, so that the space inside the support is extremely complex and narrow, and the assembling and welding operation of subsequent steel plates is extremely inconvenient.
Disclosure of Invention
The invention provides a steel containment vessel top head assembling support for a nuclear power station, aiming at solving the problems that the construction cost of the support is high and the operation space in the support is narrow when a top head is assembled by adopting a supporting device in the prior art. The steel containment vessel top head assembling support for the nuclear power station comprises an edge support and an internal support; the edge support is fixedly connected with the ground according to the radius of the lower opening of the top seal head; the inner support is fixedly connected with the ground according to the projection positions of the middle bottom layer steel plate, the middle lower layer steel plate and the middle upper layer steel plate on the ground, and the height of the inner support corresponds to the height of the corresponding steel plate supporting point position.
Preferably, the edge support comprises two edge columns, a cross beam and two inclined struts; one end of the edge upright post is connected with the ground, the other end of the edge upright post is provided with a supporting platform, the supporting platform is provided with two baffles, and a clamping groove is formed between the two baffles and used for fixing the bottom steel plate; the cross beam is positioned between the two edge columns; one end of the inclined strut is connected with the edge upright post, and the other end of the inclined strut is connected with the ground.
Further preferably, a circle of edge brackets is arranged on the ground, wherein the number of the edge brackets is the same as that of the steel plates in the bottom layer of the steel plates, and the edge brackets are uniformly distributed along the circumferential direction.
Preferably, the inner support comprises an inner upright post and a telescopic device; the bottom of the inner upright post is connected with the ground, the telescopic device is fixedly connected with the top of the inner upright post, and the telescopic device can be telescopically adjusted along the height direction of the inner upright post; and the adjacent inner brackets are fixedly connected through an inner cross beam and an inclined pull rod.
Further preferably, the telescopic device comprises a base, a spherical end part and a connecting rod; the base is connected with the inner upright column, the spherical end part is in contact support with the inner wall of the top head, the connecting rod is located between the base and the spherical end part, and the connecting rod is movably connected with the base along the vertical direction.
Further preferably, the connecting rod adopts a threaded rod structure, is in threaded connection with the base, and is fixed to the base through a nut.
Preferably, three circles of the inner supports are arranged on the ground, a first circle of the supports are used for supporting the bottom layer of the steel plate, a second circle of the supports are used for supporting the middle and lower layers of the steel plate, and a third circle of the supports are used for supporting the middle and upper layers of the steel plate.
Further preferably, the number of the inner brackets in the first ring of brackets is the same as that of the steel plates in the bottom layer of steel plates, and the inner brackets are arranged in a one-to-one correspondence manner; the number of the inner brackets in the second circle of brackets is the same as that of the steel plates in the middle and lower layers of steel plates, and the inner brackets are arranged in a one-to-one correspondence manner; the number of the inner supports in the third ring of supports is equal to twice of the number of the steel plates in the middle upper layer of steel plates, and the two inner supports are arranged in a group and correspond to one steel plate.
Further preferably, the number of the inner brackets in the first ring of brackets is equal to half of the number of the steel plates in the bottom layer of steel plates, and the inner brackets are arranged corresponding to one of the two adjacent steel plates; the number of the inner brackets in the second circle of brackets is equal to half of the number of the steel plates in the middle and lower layers of steel plates, and the inner brackets are arranged corresponding to one of the two adjacent steel plates; the number of the inner supports in the third ring of supports is equal to the number of the steel plates in the middle upper layer of steel plates, wherein two inner supports are in a group, and one group of inner supports is arranged corresponding to one steel plate in two adjacent steel plates.
Preferably, along the circumferential direction of the projection of the head on the ground, the inner brackets in the first ring of brackets and the second ring of brackets are located at the central position of the projection of the corresponding steel plate on the ground, and the inner brackets in the same group in the third ring of brackets are located at the 1/4 and 3/4 positions of the projection of the corresponding steel plate on the ground respectively; along the direction that the top head points to the center from the edge in the projection on the ground, the first circle of support is located bottom steel plate is at about 4/5 positions on the projection on the ground, the second circle of support is located well lower floor steel plate is at about 2/3 positions on the projection on the ground, the third circle of support is located well upper steel plate is at about 2/3 positions on the projection on the ground.
The assembling bracket for the steel containment vessel top head of the nuclear power station has the following beneficial effects:
1. the assembly support is composed of an edge support and an inner support, and a circle of edge support for supporting the end part of the bottom steel plate and three circles of inner supports for supporting the inner wall of the bottom steel plate, the inner wall of the middle-lower steel plate and the inner wall of the middle-upper steel plate are arranged according to the structure of the top head. Like this, at the assembly in-process of bottom steel sheet, through two marginal stand columns in the marginal support and an inside stand column in the inside support, can realize carrying out three point support fixed to the steel sheet in the bottom steel sheet. In the assembling process of the middle-lower layer steel plate and the middle-upper layer steel plate, three-point supporting fixation of the middle-lower layer steel plate and four-point supporting fixation of the middle-upper layer steel plate are respectively realized through the positioning block and the internal upright columns in the internal support. At this time, the total weight of the assembled bracket is only 210 tons and is far lower than the usage amount of 460 tons of materials in the prior art, so that the erection amount of the bracket and the usage amount of the bracket materials are greatly reduced under the condition of ensuring the stable supporting effect of each steel plate, and the construction cost is reduced. Meanwhile, the four rings of supports are mutually independent, so that the structure of the support is further simplified, the operation space inside the assembled support is increased, great convenience is brought to the construction of operators, and the construction efficiency is improved.
2. In the invention, the fixed positions of the three circles of inner brackets are accurately positioned and fixed, so that the deformation quantity of the steel plate in the head socket is far lower than the design requirement under the supporting action of the assembly bracket in the invention, namely the deformation quantity does not exceed the plate thickness of the steel plate. Therefore, the deformation of the steel plate is effectively controlled after the assembly support is optimized and improved, the bottom steel plate, the middle-lower steel plate and the middle-upper steel plate are fixedly supported at three points, the deformation generated by the middle-upper steel plate is far smaller than the thickness of the steel plate, the requirement on the deformation of the steel plate in the assembly process of the top head is met, and the assembly quality of the top head is ensured.
Drawings
FIG. 1 is a schematic structural diagram of the appearance of a head in a steel containment vessel;
FIG. 2 is a schematic structural view of a header assembly bracket according to the prior art;
FIG. 3 is a schematic structural diagram of a head cover assembly bracket in a steel containment vessel according to the present invention;
FIG. 4 is a schematic view of the edge support of the present invention;
FIG. 5 is a schematic view of the connection between adjacent internal brackets according to the present invention;
FIG. 6 is a schematic view of the retractable device shown in FIG. 5;
FIG. 7 is a schematic flow chart of the assembly of the steel containment vessel head of the nuclear power plant by using the assembly bracket of the invention;
FIG. 8 is a schematic diagram showing the positional relationship between the assembled bracket and different layers of steel plates in the head casing according to the present invention;
FIG. 9 is a schematic view of the assembly of different layers of steel plates in the head enclosure by using the assembly bracket of the invention;
FIG. 10 is a schematic view of the assembly of the bottom steel plates when the number of the internal columns is the same as that of the steel plates in the present invention;
FIG. 11 is an assembly diagram of bottom steel plates when the number of the internal columns is half of that of the steel plates in the invention;
FIG. 12 is a schematic view of the positions of the supporting points of the internal columns of the present invention when supporting different layers of steel plates;
FIG. 13 is a distribution diagram of deformation of a steel plate obtained by a deformation simulation analysis of a bottom steel plate;
FIG. 14 is a distribution diagram of deformation quantities of steel plates obtained when deformation quantity simulation analysis is performed on middle and lower steel plates;
fig. 15 is a distribution diagram of the deformation amount of the steel sheet obtained when the deformation amount simulation analysis is performed on the middle and upper steel sheets.
Detailed Description
The technical scheme of the invention is described in detail in the following with reference to the accompanying drawings.
Referring to fig. 1 and 3, the steel containment vessel head assembly bracket for a nuclear power plant according to the present invention includes an edge bracket 20 and an inner bracket 30. Wherein, the edge bracket 20 is fixedly connected with the ground according to the radius of the lower opening of the top head 10. And the inner bracket 30 is fixedly connected with the ground according to the projection positions of the bottom steel plate 11, the middle and lower steel plates 12 and the middle and upper steel plates 13 in the top head 10 on the ground, and the height of the inner bracket 30 corresponds to the height of the position of the corresponding steel plate supporting point.
As shown in fig. 4, the edge bracket 20 includes two edge posts 21, a cross beam 22, and two diagonal braces 23. Wherein, one end of the edge upright post 21 is provided with an installation plate 24 and is fixedly connected with the ground through an anchor bolt or an embedded part, and the other end is provided with a supporting platform 25. Two baffles 26 are arranged on the supporting platform 25, and a gap is left between the two baffles 26 to form a clamping groove for inserting and fixing the bottom steel plate 11. The beam 22 is located between the two edge posts 21, and one end of the diagonal brace 23 is connected with the edge posts 21, and the other end is connected with the ground. Therefore, the firmness of connection between the edge upright post 21 and the ground can be improved through the cross beam 22 and the inclined strut 23, and the support stability of the head enclosure 10 is ensured.
In addition, a backing plate 27 is provided on the support platform 25 and is located in a slotted position between the two baffles 26. After the fixation of all edge supports 20 is completed, the height of the upper surface of all support platforms 25 is measured by means of a total station and the height difference between the different support platforms 25 is obtained. According to the height difference, the base plates 27 with different thicknesses are arranged on the supporting platform 25, so that the upper surfaces of all the base plates 27 are positioned on the same horizontal plane, and the lower end surfaces of the base steel plates 11 are positioned on the same horizontal plane after being inserted between the two baffle plates 24. Meanwhile, the height of the upper surface of the gasket 27 is made to be greater than that of the carrier vehicle, so that the carrier vehicle can directly enter the lower end of the head enclosure 10, and the carrier vehicle can lift and consign the head enclosure 10 conveniently.
As shown in connection with fig. 5, the inner support 30 includes an inner post 31 and a telescoping device 32. The bottom of the inner pillar 31 is fixedly connected with the ground through an anchor bolt or an embedded part. The telescopic device 32 is fixedly connected to the top of the inner column 31, and the telescopic device 32 can be telescopically adjusted in the height direction of the inner column 31. Two inner brackets 30 adjacent in the circumferential direction are fixedly connected through the inner cross beam 33 and the diagonal draw bar 34, so that a complete annular support structure is formed by connection.
As shown in fig. 6, the telescopic device 32 includes a base 321, a spherical end 322, and a connecting rod 323. Wherein, base 321 passes through bolt and the top fixed connection of inside stand 31, and spherical end 322 contacts the inner wall of support steel sheet, and connecting rod 323 is located between base 321 and spherical end 322. Preferably, the connecting rod 323 is a threaded rod structure. At this time, one end of the connecting rod 323 is fixedly connected to the spherical end portion 322, and the other end is screwed to the base 321, and the connecting rod 323 and the base 321 are fixed to each other by the nut 324. Like this, through rotating connecting rod 323 for base 321, can adjust the height of spherical tip 322 to carry out rigidity to it through nut 324, thereby realize the adjustment to the whole height of inner support 30, make spherical tip 322 and steel sheet inner wall keep stable contact, guarantee inner support 30 accuracy and stability to the steel sheet supports.
Referring to fig. 7, the specific steps of assembling the top head by using the assembling bracket for the steel containment vessel top head of the nuclear power station provided by the invention are as follows:
step one, mounting the assembly support. Referring to fig. 8, the edge bracket 20 and the inner bracket 30 are installed and fixed in position according to the structural size of the head unit 10.
Preferably, a circle of edge brackets 20 corresponding to the head 10 is arranged on the ground according to the radius of the lower opening of the head, wherein the number of the edge brackets 20 is the same as that of the steel plates in the bottom steel plate 11, and the edge brackets are uniformly arranged along the circumferential direction. Thus, each of the bottom steel plates 11 can be supported and fixed by the two edge posts 21.
Preferably, three circles of inner supports 30 are arranged inside the circle surrounded by the edge support 20, namely a first circle of supports 301 for supporting the bottom layer steel plate 11, a second circle of supports 302 for supporting the middle and lower layer steel plates 12 and a third circle of supports 303 for supporting the middle and upper layer steel plates 13. Thus, one inner upright 31 in the first ring of brackets 301 and the second ring of brackets 302 corresponds to one steel plate, and two inner uprights 31 in the third ring of brackets 303 correspond to one steel plate, that is, one steel plate in the bottom steel plate 11 and the middle and lower steel plates 12 is supported by one inner upright 31, and one steel plate in the middle and upper steel plates 13 is supported by two inner uprights 31.
And step two, assembling the top seal head. Referring to fig. 9, after the complete installation and inspection of the edge bracket 20 and the inner bracket 30, the bottom steel plate 11, the middle and lower steel plates 12, the middle and upper steel plates 13, and the top steel plate 14 are sequentially assembled and fixed to each other along a direction from the edge to the center of the head 10.
Preferably, as shown in fig. 10, when the inner support 30 is provided in the present invention, the number of the inner columns 31 in the first ring of supports 301 is equal to the number of the steel plates in the bottom steel plate 11, the number of the inner columns 31 in the second ring of supports 302 is equal to the number of the steel plates in the middle-lower steel plate 12, the number of the inner columns 31 in the third ring of supports 303 is equal to 2 times of the number of the steel plates in the middle-upper steel plate 13, and all the inner columns 31 are uniformly arranged along the circumferential direction of the circle in which they are located.
At this time, when the bottom steel plate 11 is assembled, the lower end of each steel plate is supported by two edge pillars 21 in the edge bracket 20, and the inner wall is supported by one inner pillar 31, so as to form a three-point support fixing. When the middle and lower steel plates 12 are assembled, firstly, two positioning blocks 15 are arranged at the outer surface position of the lower edge of each steel plate, namely, at one end connected with the bottom steel plate 11 in a spot welding manner, then in the hoisting process, the positioning blocks 15 in the steel plates are erected on the surface of the bottom steel plate 11 which is already assembled, the inner wall of the steel plate is in supporting contact with the inner upright column 31 in the second ring support 302, and three-point supporting fixation is formed. Similarly, when the middle and upper steel plates 13 are assembled, the four-point supporting fixation is formed on the steel plates in the middle and upper steel plates 13 by arranging the positioning block 15 and the two inner columns 31 in the third ring of brackets 303. Similarly, a plurality of positioning blocks 15 may be provided on the steel plate according to the field situation, so as to improve the support stability of the steel plate.
In addition, after assembling between the adjacent steel plates in the same layer of steel plates is completed, a plurality of clamping devices can be arranged on longitudinal seams between the adjacent steel plates. Therefore, the gap between the adjacent steel plates and the position relation between the adjacent steel plates can be finely adjusted through the clamping apparatus, so that the steel plates can meet the design requirements and then are welded and fixed.
In addition, in order to improve the stability of the steel plates in the assembling process, especially before the first steel plate and the second steel plate in each layer of steel plates are fixedly connected, the first steel plate is stable when the first steel plate is supported and fixed at three points, and the cable rope 16 can be arranged on the first steel plate when the first steel plate of each layer of steel plates is assembled. Therefore, under the auxiliary fixation of the guy rope 16, the stability of the steel plate assembling process can be enhanced, and the external interference resistance of the steel plate assembling process is improved.
Preferably, as shown in fig. 11, the number of the inner columns 31 in the inner bracket 30 can be halved in the present invention. The number of the inner columns 31 in the first ring of brackets 301 is equal to half of the number of the steel plates in the bottom steel plate 11, the number of the inner columns 31 in the second ring of brackets 302 is equal to half of the number of the steel plates in the middle-lower layer steel plate 12, and the number of the inner columns 31 in the third ring of brackets 303 is equal to the number of the steel plates in the middle-upper layer steel plate 13. Like this, can further reduce the use amount to the support material, increase the inside operating space of support to in the operation workman more convenient assemble and welding operation, improve whole efficiency of construction.
At this time, the inner pillars 31 in the first ring holder 301 and the second ring holder 302 are also uniformly arranged in the circumferential direction, but the inner pillars 31 in the third ring holder 303 are grouped into two and the uniform arrangement in the circumferential direction is performed in units of groups. Thus, in each layer of steel plates, half of the steel plates can be directly supported by the inner upright columns 31, the other half of the steel plates can not be supported by the inner upright columns 31, and the two steel plates are alternately distributed, namely one steel plate corresponds to the inner upright columns 31 and can be supported, and the other steel plate does not support the corresponding inner upright columns 31.
Thus, when assembling each layer of steel plate, firstly, the steel plates which can be directly supported by the internal upright columns 31 in the layer are assembled, namely, three-point supporting and fixing of the bottom layer steel plate 11 is completed through the edge upright columns 21 and the internal upright columns 31, three-point supporting and fixing of the middle and lower layer steel plates 12 and four-point supporting and fixing of the middle and upper layer steel plates 13 are respectively completed through the positioning blocks 15 and the internal upright columns 31, then, the rest steel plates are assembled, and the steel plates are inserted and assembled between the assembled steel plates by arranging the positioning blocks 15 on the rest steel plates. Similarly, when the steel plate which can be directly supported is assembled, the cable rope 16 can be arranged on the steel plate for auxiliary fixation.
In addition, for the assembly of the top steel plate 14, the self assembly and welding of the top steel plate 14 are firstly carried out on the ground, namely when the top steel plate 14 is composed of a plurality of arc-shaped steel plates, the top steel plate 14 is firstly assembled into a whole, and then the top steel plate is fixedly connected with the middle-upper steel plate 13 by integrally hoisting the top steel plate. Therefore, the high-altitude operation can be reduced, the assembly of the high-altitude operation device can be carried out on the ground, and the assembly quality and efficiency can be improved.
Further preferably, in order to ensure that the assembly bracket of the present invention is used, when the bottom steel plate 11 and the middle and lower steel plates 12 are fixed in a three-point supporting manner and the middle and upper steel plates 13 are fixed in a four-point supporting manner, the deformation amount of the steel plates meets the design requirement, i.e., the maximum deformation amount of the steel plates cannot exceed the thickness dimension of the steel plates, and the fixing position of the inner upright column 31 is further precisely positioned.
Referring to fig. 12, in the direction in which the top head 10 is projected on the ground from the edge to the center, the inner upright 31 in the first ring of brackets 301 is located at about 4/5 position of the bottom steel plate 11 projected on the ground, the inner upright 31 in the second ring of brackets 302 is located at about 2/3 position of the middle-lower steel plate 12 projected on the ground, and the inner upright 31 in the third ring of brackets 303 is located at about 2/3 position of the middle-upper steel plate 13 projected on the ground. Along the circumferential direction of the ground projection of the head 10, the inner upright 31 in the first ring of brackets 301 and the second ring of brackets 302 is located at the middle position of the ground projection of the corresponding steel plate, and the two inner uprights 31 in the third ring of brackets 303 supporting the same steel plate are respectively located at the 1/4 and 3/4 positions of the ground projection of the corresponding steel plate.
Next, a simulation analysis of the deformation amount was performed on the steel plate using the above-described support position by the SAP2000 structural analysis software. The simulation analysis takes a CAP head in CAP1000 nuclear power as an example, and the deformation quantity of the steel plate under the action of the self weight is calculated according to the size and weight parameters of the steel plate at different positions in the CAP head. The thickness of the top head steel plate in CAP1000 nuclear power is 41.3mm, namely the maximum deformation design requirement of the steel plate is 41.3 mm.
Fig. 13 is a distribution diagram of the deformation amount obtained when the deformation amount simulation analysis is performed on the underlying steel sheet 11. As can be seen from fig. 13, the maximum deformation of the underlying steel sheet 11 occurs at both sides near one end 1/5 of the edge brace 20 and is about 6mm, much less than the maximum deformation of the steel sheet 41.3 mm. Fig. 14 is a distribution diagram of the deformation amount obtained when the middle and lower steel plates 12 are subjected to deformation amount simulation analysis. As can be seen from fig. 14, the maximum deformation amount of the middle and lower steel plates 12 occurs at both side positions near one end 1/3 of the lower steel plate 11, and is about 18mm, which is much smaller than the maximum deformation amount of the steel plates 41.3 mm. Fig. 15 is a distribution diagram of the deformation amount obtained when the middle and upper steel sheets 13 are subjected to deformation amount simulation analysis. As can be seen from fig. 15, the maximum deformation amount of the middle and upper layer steel plate 13 occurs at a middle position near one end of the middle and lower layer steel plate 12, and the maximum deformation amount is about 3mm, which is much smaller than the maximum deformation amount of the steel plate 41.3 mm.
In summary, by analyzing the deformation of the CAP head in CAP1000 nuclear power through SAP2000 structural analysis software, it can be known that when the assembling bracket of the present invention is used for supporting and assembling a steel plate in the CAP head, the maximum deformation generated under the action of the self weight of the steel plate is smaller than the thickness dimension of the steel plate, that is, smaller than the maximum deformation requirement of the steel plate design, and the assembling requirement of the CAP head is satisfied.
Claims (7)
1. A steel containment vessel top head assembling support for a nuclear power station is characterized by comprising an edge support and an inner support; the edge support is fixedly connected with the ground according to the radius of the lower opening of the top seal head; the inner bracket is fixedly connected with the ground according to the projection positions of the bottom steel plate, the middle and lower steel plates and the middle and upper steel plates on the ground, and the height of the inner bracket corresponds to the height of the support point of the corresponding steel plate;
the inner support comprises an inner upright post and a telescopic device; the bottom of the inner upright post is connected with the ground, the telescopic device is fixedly connected with the top of the inner upright post, and the telescopic device can be telescopically adjusted along the height direction of the inner upright post; the adjacent inner brackets are connected and fixed through an inner cross beam and an inclined pull rod;
the ground is provided with three circles of the internal supports, namely a first circle of support for supporting the bottom layer steel plate, a second circle of support for supporting the middle and lower layer steel plates and a third circle of support for supporting the middle and upper layer steel plates;
along the circumferential direction of the projection of the head socket on the ground, the inner supports in the first circle of supports and the second circle of supports are positioned at the central positions of the projection of the corresponding steel plates on the ground, and the inner supports in the same group in the third circle of supports are respectively positioned at the 1/4 positions and 3/4 positions of the projection of the corresponding steel plates on the ground; along the direction that the top head points to the center from the edge in the projection on the ground, the first circle of support is located bottom steel plate is at about 4/5 positions on the projection on the ground, the second circle of support is located well lower floor steel plate is at about 2/3 positions on the projection on the ground, the third circle of support is located well upper steel plate is at about 2/3 positions on the projection on the ground.
2. The nuclear power station steel containment vessel head assembly bracket as recited in claim 1, wherein the edge bracket comprises two edge columns, a cross beam and two diagonal braces; one end of the edge upright post is connected with the ground, the other end of the edge upright post is provided with a supporting platform, the supporting platform is provided with two baffles, and a clamping groove is formed between the two baffles and used for fixing the bottom steel plate; the cross beam is positioned between the two edge columns; one end of the inclined strut is connected with the edge upright post, and the other end of the inclined strut is connected with the ground.
3. The nuclear power station steel containment vessel head assembling support as claimed in claim 2, wherein a circle of the edge supports is arranged on the ground, wherein the number of the edge supports is the same as that of the steel plates in the bottom layer of the steel plates, and the edge supports are uniformly distributed along the circumferential direction.
4. The nuclear power plant steel containment vessel head assembly bracket as recited in claim 1, wherein the telescoping device comprises a base, a spherical end and a connecting rod; the base is connected with the inner upright column, the spherical end part is in contact support with the inner wall of the top head, the connecting rod is located between the base and the spherical end part, and the connecting rod is movably connected with the base along the vertical direction.
5. The assembling support for the steel containment vessel top head of the nuclear power plant as claimed in claim 4, wherein the connecting rod is of a threaded rod structure, the connecting rod is in threaded connection with the base, and the connecting rod and the base are fixed in position through nuts.
6. The assembling method of the steel containment vessel head of the nuclear power plant as recited in claim 1, wherein the number of the internal brackets in the first ring of brackets is the same as the number of the steel plates in the bottom layer of steel plates and the brackets are arranged in a one-to-one correspondence; the number of the inner brackets in the second circle of brackets is the same as that of the steel plates in the middle and lower layers of steel plates, and the inner brackets are arranged in a one-to-one correspondence manner; the number of the inner supports in the third ring of supports is equal to twice of the number of the steel plates in the middle upper layer of steel plates, and the two inner supports are arranged in a group and correspond to one steel plate.
7. The assembling method of the steel containment vessel head of the nuclear power plant as recited in claim 6, wherein the number of the internal brackets in the first ring of brackets is equal to half of the number of the steel plates in the bottom layer of steel plates, and the internal brackets are arranged corresponding to one of the two adjacent steel plates; the number of the inner brackets in the second circle of brackets is equal to half of the number of the steel plates in the middle and lower layers of steel plates, and the inner brackets are arranged corresponding to one of the two adjacent steel plates; the number of the inner supports in the third ring of supports is equal to the number of the steel plates in the middle upper layer of steel plates, wherein two inner supports are in a group, and one group of inner supports is arranged corresponding to one steel plate in two adjacent steel plates.
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| CN201711466029.9A CN108277988B (en) | 2017-06-30 | 2017-06-30 | Nuclear power station steel containment vessel top head assembling support |
| CN201710525784.3A CN107345452B (en) | 2017-06-30 | 2017-06-30 | Nuclear power station steel containment vessel top head assembling support |
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| CN201710525784.3A CN107345452B (en) | 2017-06-30 | 2017-06-30 | Nuclear power station steel containment vessel top head assembling support |
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| CN107345452B true CN107345452B (en) | 2020-01-21 |
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| CN110259150B (en) * | 2019-05-22 | 2021-05-04 | 山东核电设备制造有限公司 | Assembling support and assembling method for steel containment vessel top head of nuclear power station |
| CN111456224B (en) * | 2020-04-14 | 2021-04-27 | 金陵科技学院 | Light steel structure assembly and assembled space structure |
| CN111894122B (en) * | 2020-07-16 | 2021-08-24 | 武汉绿林环保节能科技有限公司 | Container type rapid assembling house module |
| CN112324156B (en) * | 2020-10-23 | 2021-06-29 | 北京城建六建设集团有限公司 | Ring beam joint combination and assembly method |
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| CN101967886A (en) * | 2010-11-16 | 2011-02-09 | 中国核工业第五建设有限公司 | Assembly and installation methods of steel containment vessel of nuclear power station |
| CN102535870A (en) * | 2011-12-30 | 2012-07-04 | 大连理工大学 | Tooling support for assembling and transporting nuclear-power containment-vessel cover head |
| CN102689736A (en) * | 2012-06-01 | 2012-09-26 | 中国核工业第五建设有限公司 | Special supporting device of cover head of nuclear island containment vessel made of steel and transportation method |
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| CN108277988A (en) | 2018-07-13 |
| CN107345452A (en) | 2017-11-14 |
| CN108277988B (en) | 2020-03-27 |
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