CN110271949B - Ring beam and ring rail installation process of nuclear island ring crane - Google Patents
Ring beam and ring rail installation process of nuclear island ring crane Download PDFInfo
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- CN110271949B CN110271949B CN201810209153.5A CN201810209153A CN110271949B CN 110271949 B CN110271949 B CN 110271949B CN 201810209153 A CN201810209153 A CN 201810209153A CN 110271949 B CN110271949 B CN 110271949B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- Mechanical Engineering (AREA)
- Leg Units, Guards, And Driving Tracks Of Cranes (AREA)
Abstract
The invention aims to provide a ring beam and ring rail installation process of a nuclear island ring crane, which is used for shortening the period of high-altitude operation of ring beam and ring rail construction. The installation process of the ring beam and the ring rail of the nuclear island ring crane comprises the following steps: designing and manufacturing a ring beam ground integral assembly platform; arranging a ring beam ground integral assembling platform; integrally assembling an adjusting ring beam on a ring beam ground integral assembling platform; collecting ring beam bolt hole data; drilling the bracket according to the collected ring beam bolt hole data; assembling and welding the circular rail on a circular rail ground assembling platform; installing and adjusting the ring rail on the ring beam, and fixing the ring rail on the ring beam; and integrally hoisting the ring beam and the ring rail in place.
Description
Technical Field
The invention relates to a nuclear power station construction process, in particular to a ring beam and ring rail integral assembling and hoisting process of a nuclear island ring crane.
Background
The installation method of the existing nuclear power station nuclear island ring beam and ring rail is as follows:
1) The ring beam is preassembled on the ground, various mounting data are measured after the ring beam is assembled to meet the design requirements, bolt hole data at the bottom of the ring beam are collected, and then the operations of drilling a bracket, machining a base plate and the like are carried out;
2) After the drilling work of the bracket is finished, hoisting the ring beam in place in sections by a large crane;
3) The circular rail welding can be divided into a ground welding part and a high-altitude welding part, and the main reason is that: the method has the advantages that the deformation of the welded ring rail due to overlong size during hoisting is prevented, the last section of welding is reserved on the ring rail, the gap of the last section of welded junction is measured after the ring rail is assembled on the ring beam, and the last section of ring rail is subjected to size cutting.
The ring beam and the ring rail are hoisted in place to the bracket in a sectional mode, and the roundness, the radius and the levelness of the upper cover plate are adjusted at high altitude, the rest welded junctions of the ring rail are welded, the roundness, the radius and the elevation of the rail are adjusted, and the rail pressing plate is installed. The ring beam and the ring rail are installed and adjusted in place in a sectional hoisting mode at high altitude, and the high altitude construction period is long. Because the single section is heavier, the on-site tower crane cannot meet the hoisting requirement, the ring beam needs to be hoisted in place by a large crane, the hoisting in-place working conditions of each section of ring beam are inconsistent, and the super-lifting counterweight of the large crane needs to be transported for many times, so that the hoisting in place by adopting a sectional hoisting mode has many times and takes long time for the large crane.
Wangyuchun et al, china Nuclear Power, vol.4, no. 4, published in 2011 and 12 months "Ling-ao Nuclear Power station second-stage engineering nuclear island annular Crane installation and management", wherein the installation process of the ring beam and the ring rail is similar to the process.
Disclosure of Invention
The invention aims to provide a ring beam and ring rail installation process of a nuclear island ring crane, which is used for shortening the period of high-altitude operation of ring beam and ring rail construction.
The installation process of the ring beam and the ring rail of the nuclear island ring crane comprises the following steps:
designing and manufacturing a ring beam ground integral assembly platform;
step two, arranging a ring beam ground integral assembly platform;
step three, integrally assembling an adjusting ring beam on a ring beam ground integral assembling platform;
collecting ring beam bolt hole data;
fifthly, drilling the bracket according to the collected ring beam bolt hole data;
sixthly, assembling and welding the circular rail on a circular rail ground assembling platform;
step seven, installing and adjusting the ring rail on the ring beam, and fixing the ring rail on the ring beam;
and step eight, integrally hoisting the ring beam and the ring rail in place.
In one embodiment, in the step one, a plurality of ring beam ground integral assembling platforms are made of reinforced concrete, and a plurality of embedded plates are arranged on the upper surface of each ring beam ground integral assembling platform and used for adjusting the radial position of each ring beam during ground assembling.
In one embodiment, in the second step, the overall height difference of the multiple ring beam ground integrated assembly platforms after prefabrication is controlled within 10mm, so as to meet the requirement of adjusting the levelness of the upper surface of the ring beam.
In one embodiment, in the third step, the ring beam is adjusted to the level of the upper cover plate within 8mm during assembly, the track radius error of the horizontal wheel meets the requirements of +/-4 mm and the roundness is less than or equal to 5mm, and then the fourth step and the fifth step are carried out.
In one embodiment, in the fourth step, in order to avoid the influence of the ring beam temperature difference on the measurement, the ring beam ground assembly adjustment measurement, the bolt hole data acquisition and the bracket drilling position paying-off are carried out for the same time period.
In one embodiment, in step six, a rail welding simulation test is performed before welding the ring rail to confirm data of rail welding deformation and welding shrinkage of the ring rail, the actual arc length of each section of rail is measured before welding the ring rail, the assembly gap of each section of welding is determined according to the shrinkage of the welding simulation test, the welding openings of the ring rail are welded by adopting an assembly platform which is completely arranged on the ground of the ring rail, and the last welding opening is reserved to be preassembled on the ring beam to determine the cutting length of the ring rail.
In one embodiment, in step seven, after all the welding openings of the ring rail are welded, the ring rail is placed on the ring beam for assembly adjustment, and the ring rail is fixed on the ring beam by using the rail pressing plate.
In one embodiment, in the step eight, the ring beam and the ring rail are directly hoisted in place to the bracket through a special hoisting tool, the special hoisting tool comprises a connecting support, a sling distributor and a plurality of casting steel wire ropes with equal length and pin shafts, the connecting support is connected with a hook head of a large crane, the plurality of casting steel wire ropes with equal length and pin shafts respectively penetrate through pulleys on the sling distributor to be connected with lifting lugs on the ring beam, and the special hoisting tool is used for carrying out load sharing on the weight of the ring beam and the weight of the ring rail so as to meet the hoisting requirements of the ring beam and the ring rail.
In one embodiment, in the step one, two lifting lugs are arranged on the upper side of the ring beam ground integral assembling platform by using steel bars, and grooves are formed in the positions of the lifting lugs, so that the height of the upper surfaces of the lifting lugs does not exceed the height of the upper side of the assembling platform.
The installation process of the ring beam and the ring rail of the nuclear island ring crane is that the ring beam and the ring rail are integrally assembled on the ground, and the ring beam and the ring rail are integrally hoisted in place by a ring beam integral hoisting tool, so that the problems that the traditional method adopts a sectional hoisting mode, the overhead working period is long, and the time of occupying a large crane is long are well solved. Through the integral hoisting process of the ring beam and the ring rail, the hoisting times of the ring beam and the ring rail are reduced, the high-altitude operation period of the construction of the ring beam and the ring rail is shortened, the problems that the integral hoisting of the ring beam and the ring rail is easy to deform and the alignment difficulty of a ring beam bolt hole and a bracket bolt hole is high are solved, and the requirement of accurate matching of the ring beam bolt hole and the bracket bolt hole can be met.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and examples, in which:
FIG. 1 is a plan view of one of the ring beam ground integral assembly platforms;
FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view of a special tool for integral hoisting of a ring beam and a ring rail;
fig. 4 is a layout view of the ring beam ground integral assembly platform.
Detailed Description
The present invention is further described in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from those described herein, and it will be readily appreciated by those skilled in the art that the present invention can be implemented in many different forms without departing from the spirit and scope of the invention.
In the following embodiment, in order to reduce the hoisting times of the ring beam and the ring rail and shorten the construction high-altitude operation period of the ring beam and the ring rail, the ring beam is supported by designing a ring beam splicing platform to be integrally assembled on the ground, the ring rail is completely welded on the ground, a special hoisting rigging is designed to equally distribute the load of the whole weight of the ring beam, and bolt hole data at the bottom of the ring beam are accurately collected and then lofted on a bracket and drilled, so that the purpose of accurately matching bolt holes of the bracket and the bolt holes of the ring beam is achieved.
The ring beam and ring rail integral hoisting process disclosed by the following embodiment is a mode that the ring beam and the ring rail are integrally assembled on the ground and are integrally hoisted in place by a ring beam integral hoisting tool. The main process for integrally hoisting the ring beam and the ring rail comprises the following steps:
1) Designing and manufacturing a ring beam ground integral assembly platform;
2) Arranging a ring beam ground integral assembly platform;
3) Integrally assembling and adjusting the ring beam ground;
4) Collecting data of ring beam bolt holes;
5) Drilling holes on the bracket;
6) Assembling and welding the circular rail ground;
7) Installing and adjusting the circular rail;
8) And integrally hoisting the ring beam and the ring rail in place.
In one embodiment, in order to meet the requirement of integral assembly of the ring beam and the ring rail on the ground, 27 splicing platforms are arranged below the ring beam when the ring beam and the ring rail are on the ground, and the number of the splicing platforms can be adjusted. As shown in fig. 1 and 2, the assembly platform 1 includes reinforcing bars 11, reinforcing bars 12 and embedded plates 13, the body of the assembly platform 1 is made of concrete, 4 embedded plates 13 arranged on the upper surface of the assembly platform are used for adjusting the radial position of the ring beam during ground assembly, and the reinforcing bars 11 and 12 are used for enhancing the strength of the ring beam. The whole height difference of all the prefabricated assembly platforms 1 is controlled within 10mm so as to meet the requirement of adjusting the levelness of the upper surface of the ring beam. In order to facilitate the hoisting of the assembly platform, two lifting lugs 14 are required to be arranged above the assembly platform by using steel bars, and two grooves 10 are formed in the positions of the lifting lugs 14, so that the height of the upper surface of each lifting lug 14 is not more than that of the upper surface of the assembly platform 1. The placement of the build-up platform is shown in fig. 4. In fig. 4, 27 assembly platforms 1 are arranged along one circumferential direction, each section of ring beam 2 is supported by 3 assembly platforms 1, and the assembly platforms are arranged to avoid the positions of the bolt holes 21 at the bottom of the ring beam 2.
Because ring beam bolt hole and bracket bolt required precision are high, in order to ensure the matching nature of ring beam bolt hole and bracket bolt hole, the ring beam is including being located its upside upper cover and being located its downside lower cover, horizontal wheel track, the ring beam is adjusted it when ground equipment to the upper cover plate levelness and is satisfied within 8mm, horizontal wheel track radius error satisfies 4mm, after the requirement that circularity is less than or equal to 5mm, carry out the collection work of ring beam bolt hole data again, drill according to the data of the bolt hole on the ring beam on the bracket. In order to avoid the influence of the ring beam temperature difference on measurement, the work of ring beam ground assembly adjustment measurement, bolt hole data acquisition and bracket drilling position paying-off is carried out in the same time period every morning. The horizontal wheel track radius is 21990mm in one embodiment.
A rail welding simulation test is carried out before ring rail welding to confirm data such as rail welding deformation and welding shrinkage, the actual arc length of each section of rail needs to be measured before rail welding, the assembly gap of each section of welding is determined according to the shrinkage of the welding simulation test, all ring rail welding openings are welded on the ground, and the last welding opening is reserved to be preassembled on a ring beam to determine the cutting length of the ring rail.
And after all the welding openings of the ring rail are welded, the ring rail is placed on the ring beam to be assembled and adjusted, and the ring rail is fixed on the ring beam by using a rail pressing plate. The special lifting appliance for integrally lifting the ring beam and the ring rail can directly lift the ring beam and the ring rail to be in place on the bracket without adopting the traditional mode, connecting bolts of the ring beam and the ring beam are detached, and then the ring beam and the ring rail are lifted in place on the bracket in a segmented manner through a large crane.
As shown in fig. 3, the special lifting appliance for integral lifting of the ring beam and the ring rail comprises a connecting support 5, a sling distributor 6 and a plurality of casting steel wire ropes 7 with equal length and pin shafts, wherein the connecting support 5 is used for connecting with a hook head of a large crane, and the plurality of casting steel wire ropes 7 with equal length and pin shafts respectively pass through a plurality of pulleys 61 on the sling distributor 6 to be connected with a plurality of lifting lugs 22 on the ring beam 2. In one embodiment, 12 pulleys are arranged on the sling distributor 6, 3 pulleys are used for integrally hoisting the ring beam and the ring rail, the included angle between every two adjacent pulleys is 120 degrees, and a special tool for integrally hoisting the ring beam and the ring rail is used for carrying out load sharing on the weight of the ring beam and the ring rail so as to meet the hoisting requirements of the ring beam and the ring rail.
The implementation mode well solves the problems that a sectional hoisting mode is adopted in the traditional method, the overhead working period is long, and the time for occupying a large crane is long. Through the integral hoisting process of the ring beam and the ring rail, the hoisting times of the ring beam and the ring rail are reduced, the high-altitude operation period of the construction of the ring beam and the ring rail is shortened, the problems that the integral hoisting of the ring beam and the ring rail is easy to deform and the alignment difficulty of a ring beam bolt hole and a bracket bolt hole is high are solved, and the requirement of accurate matching of the ring beam bolt hole and the bracket bolt hole can be met.
The integral hoisting process of the ring beam and the ring rail is different from the traditional sectional hoisting process, and the main advantages of the integral hoisting process of the ring beam and the ring rail are as follows through analysis and comparison from three aspects of safety, technical quality and construction period:
1) Safety aspects
Ring beam mounting
The 9 sections of ring beams need to be independently hoisted in place in a sectional hoisting mode, the height of civil engineering construction is positive during the installation of the ring beams, the risk of cross construction with civil engineering, high falling objects, object striking and the like during the construction of the ring beams is high, the cross operation time is shortened by the integral hoisting process of the ring beams and the ring rails, and the risk rate of safety accidents is reduced.
Welding and mounting of circular rails
The welding openings of the ring rail part in a sectional hoisting mode need to be welded at high altitude, items (such as a welding machine, an oxygen cylinder, an acetylene cylinder and the like) required by welding need to be transported to the +41m high altitude, and the rail is adjusted after the welding at the high altitude is completed. And the ring rails are welded on the ground in an integral hoisting mode, and then are hoisted to the ring beam to adjust the ring rails to meet the requirements, and then are fixed by using a pressing plate and a fastening piece to be integrally hoisted with the ring beam. And multiple high-altitude construction activities are avoided by adopting an integral mode, so that the safety risk rate is reduced.
2) Quality of technology
Ring beam mounting
After the ring beam ground assembly meets the requirements, the data of bolt holes of a lower cover plate of the ring beam are required to be acquired, the bracket is drilled according to the data of the bolt holes in the ring beam, so that the bolt holes of the bracket are matched with the bolt holes of the ring beam, when a sectional hoisting mode is adopted, after the bolt holes of the ring beam are integrally assembled on the ground, the connecting bolts of the ring beam are dismantled and hoisted in place to the bracket in a sectional mode, the adjustment is carried out again, the connecting bolts of the ring beam are not required to be dismantled in the integral hoisting mode of the ring beam, and therefore the matching performance of the bracket bolt holes and the bolt holes of the ring beam in the integral hoisting mode is more accurate.
Circular rail mounting
The circular beam and the circular rail are integrally hoisted, the circular degree and the radius of the circular rail are adjusted to meet the design requirements when the circular rail is assembled on the ground and then are fixed on the circular beam through the pressing plate and the bolts, the circular rail is only needed to be retested after the circular rail is hoisted in place, and compared with segmented hoisting, the circular rail is completely adjusted on the ground, so that the operation is simpler and more convenient.
3) Analysis of construction period
The ring beam and the ring rail are integrally hoisted and hoisted in different sections, the integral hoisting process does not need to adopt a mode of combining ground welding with high-altitude welding, the ring rail is completely welded on the ground, and then the ring beam and the ring rail are integrally hoisted in place.
Table 1: section hoisting process and integral hoisting process construction period comparison table
Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are within the scope of the present invention defined by the claims.
Claims (9)
1. Ring beam and ring rail mounting process that nuclear island ring hung, its characterized in that includes:
designing and manufacturing a ring beam ground integral assembly platform;
step two, arranging a ring beam ground integral assembly platform;
step three, integrally assembling an adjusting ring beam on a ring beam ground integral assembling platform;
collecting ring beam bolt hole data;
fifthly, drilling a bracket according to the collected ring beam bolt hole data;
sixthly, assembling and welding the circular rail on a circular rail ground assembling platform;
step seven, installing and adjusting the ring rail on the ring beam, fixing the ring rail on the ring beam, welding the ring rail weld craters on a ring rail ground assembly platform, reserving the last weld crater to be pre-assembled on the ring beam to determine the cutting length of the ring rail, and after the welding of all the ring rail weld craters is finished, placing the ring rail on the ring beam to be assembled and adjusted;
and step eight, directly hoisting the ring beam and the ring rail to the bracket in place through a special hoisting tool, wherein the special hoisting tool comprises a connecting support, a sling distributor and a plurality of casting steel wire ropes with equal length and pin shafts, the connecting support is connected with a hook head of a large crane, and the ring beam and the ring rail are integrally hoisted in place.
2. The ring beam and ring rail installation process of claim 1, wherein in the step one, a plurality of ring beam ground integral assembly platforms are made of reinforced concrete, and a plurality of pre-embedded plates are arranged on the upper surface of the ring beam ground integral assembly platform and used for adjusting the radial position of the ring beam during ground assembly.
3. The ring beam and ring rail installation process of claim 2, wherein in the second step, the integral height difference of the plurality of ring beam ground integral assembly platforms after prefabrication is controlled within 10mm so as to meet the requirement of adjusting the levelness of the upper surface of the ring beam.
4. The ring beam and ring rail installation process of claim 1, wherein in step three, the ring beam is adjusted to the level of the upper cover plate within 8mm during assembly, the error of the track radius of the horizontal wheel meets the requirements of +/-4 mm and the roundness is less than or equal to 5mm, and then step four and step five are carried out.
5. The ring beam and ring rail installation process of claim 1, wherein in the fourth step, in order to avoid the influence of the ring beam temperature difference on the measurement, the ring beam ground assembly adjustment measurement, the bolt hole data acquisition and the bracket drilling position setting-out work are carried out in the same time period.
6. The ring beam and ring rail installation process of claim 1, wherein in step six, a rail welding simulation test is performed before the welding of the ring rail to confirm data of the welding deformation amount and the welding shrinkage amount of the ring rail, the actual arc length of each section of the rail is measured before the welding of the ring rail, and the pairing gap of each section of the welding is determined according to the shrinkage amount of the welding simulation test.
7. The ring beam and ring rail installation process of claim 1 wherein in step seven, a rail clamp is used to secure the ring rail to the ring beam.
8. The ring beam and ring rail installation process of claim 1, wherein in step eight, a plurality of casting steel wire ropes with equal length and pin shafts are respectively connected with the lifting lugs on the ring beam through pulleys on the sling distributor, and the special lifting appliance is used for carrying out load sharing on the weight of the ring beam and the ring rail so as to meet the lifting requirements of the ring beam and the ring rail.
9. The ring beam and ring rail installation process of claim 1, wherein in the first step, two lifting lugs are arranged on the upper side of the ring beam ground integrated assembly platform by using steel bars, and grooves are formed in the positions of the lifting lugs, so that the height of the upper surfaces of the lifting lugs does not exceed the height of the upper side of the ring beam ground integrated assembly platform.
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| CN201810209153.5A CN110271949B (en) | 2018-03-14 | 2018-03-14 | Ring beam and ring rail installation process of nuclear island ring crane |
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| CN201810209153.5A CN110271949B (en) | 2018-03-14 | 2018-03-14 | Ring beam and ring rail installation process of nuclear island ring crane |
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| CN110271949B true CN110271949B (en) | 2022-10-18 |
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| CN110640380B (en) * | 2019-10-31 | 2023-06-02 | 中国铁建重工集团股份有限公司 | Integral ring assembling tool and method for segmented steel pipe ring |
| CN112209221B (en) * | 2020-09-11 | 2022-09-20 | 山西建筑工程集团有限公司 | Hoisting device and hoisting method for projecting structure of high-rise cylindrical building |
| CN117342388B (en) * | 2023-09-19 | 2024-05-28 | 圣力(清远)钢制品有限公司 | Reinforcing bar production conveying system |
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| EP2865631A1 (en) * | 2013-10-25 | 2015-04-29 | SAL Offshore B.V. | Lifting jig and method |
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| CN103407872A (en) * | 2013-08-16 | 2013-11-27 | 上海核工程研究设计院 | Self-balance type hoisting tool for steel containment module of nuclear power plant |
| EP2865631A1 (en) * | 2013-10-25 | 2015-04-29 | SAL Offshore B.V. | Lifting jig and method |
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