CN110273551B - Deflection correction device and correction method for upper and lower stopbeams during connection - Google Patents
Deflection correction device and correction method for upper and lower stopbeams during connection Download PDFInfo
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- CN110273551B CN110273551B CN201910647668.8A CN201910647668A CN110273551B CN 110273551 B CN110273551 B CN 110273551B CN 201910647668 A CN201910647668 A CN 201910647668A CN 110273551 B CN110273551 B CN 110273551B
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- 230000009194 climbing Effects 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 238000004891 communication Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
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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
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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
- 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
- E04G21/18—Adjusting tools; Templates
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a deflection correction device and a correction method for connecting upper and lower stopbeams, which solve the technical problem of how to correct the deflection of the upper and lower stopbeams to meet the design value requirement during the installation of the upper and lower stopbeams. Including being provided with down the stoplog (3) between left roof supporting beam stand (1) and right roof beam supporting column (2), be provided with on the stoplog (3) and go up stoplog (4), left side at left roof supporting beam stand (1) is provided with left side and assists post (5), right side at right roof beam supporting column (2) is provided with right side and assists post (6), the below of lower stoplog (3) of center symmetry axis both sides between left roof supporting beam stand (1) and right roof beam supporting column (2), be provided with left climbing mechanism and right climbing mechanism that the structure is identical symmetrically, four jack-up jacks are controlled in step, jack-up down stoplog (3) when the stoplog amount deflection reaches the design value requirement, the connecting bolt of upper and lower stoplog is fastened. And the installation efficiency of the stoplog is improved.
Description
Technical Field
The invention relates to a construction device for a large-scale thermal power plant, in particular to a correction device for overcoming the deflection of a stopbeam and a correction method for the deflection of the stopbeam, which are used when the stopbeam of the boiler top of the large-scale thermal power plant is installed.
Background
Because of the pursuit of thermal efficiency, the current boiler steam parameters are higher and higher, the geometric dimension of the top plate beams of the steel structure bearing the weight of the heated surface of the boiler is larger and larger, for example, the length of the top plate beams of the 600MW supercritical boiler is more than 30 meters, the height exceeds 6 meters, and the width is 1.3 meters, and the specifications of the top plate beams far exceed the size limit of highway and railway transportation, so that many top plate beams are designed into the form of upper and lower superimposed beams. The upper and lower stacks of such roof beams are typically designed to be about 3 meters high to facilitate transportation of the roof beams from the production site to the installation site. The order of installation of the upper and lower stopbeams in the field is: the lower stoplog is firstly hung on the top plate girder upright post through a hanging device, then the upper stoplog is hung on the lower stoplog, and finally the upper stoplog and the lower stoplog are fastened and connected together through an upper stoplog connecting bolt and a lower stoplog connecting bolt to form the top plate girder. Since the mechanical properties of the beam, such as bearing capacity, deformation resistance, strength and rigidity, are not simply 1+1=2, the initial deflection and the initial stress of the lower wing plate of the H-shaped steel beam after the process is installed are far higher than those of the whole beam with the same sectional area. If, of course, an upward external force is applied to the beams before the connection of the upper and lower superimposed surfaces is completed, the deflection of the upper and lower superimposed beams is the same as the deflection when the upper and lower superimposed beams are manufactured, the larger deflection and the initial stress can be eliminated, but the external force equal to the self weight of the beams cannot be provided by an installation site, the larger deflection and the initial stress can affect the bearing capacity and the use safety of the roof beams, and how to install the upper and lower superimposed beams to enable the deflection of the finished beams to be the same as the initial stress and the deflection of the whole beams to be the same as the initial stress is a technical problem to be solved on site.
Disclosure of Invention
The invention provides a deflection correction device and a correction method for connecting an upper stop beam and a lower stop beam, which solve the technical problem of how to correct the deflection of the upper stop beam and the lower stop beam to meet the design value requirement during installation.
The invention solves the technical problems by the following technical proposal:
the utility model provides a deflection correction device when roof beam is connected from top to bottom, including left roof beam support post, right roof beam support post, be provided with down the stoplog between left roof beam support post and right roof beam support post, be provided with the stoplog on the stoplog, left side at left roof beam support post is provided with left side and assists the post, right side at right roof beam support post is provided with right side and assists the post, the below of the lower stoplog of center symmetry axle both sides between left roof beam support post and right roof beam support post is provided with left climbing mechanism and right climbing mechanism that the structure is identical symmetrically, left climbing mechanism's structure is: a left front beam and a left rear beam are respectively arranged between the top end of the left auxiliary column and the top end of the left top plate supporting beam upright in parallel, a left front connection type steel block is welded on the lower bottom surface of the right end of the left front beam, a left rear connection type steel block is welded on the lower bottom surface of the right end of the left rear beam, a left jack supporting longitudinal beam is welded between the lower bottom surface of the left front connection type steel block and the lower bottom surface of the left rear connection type steel block, a left front jack is arranged between the lower edge wing plate of the front side of the lower stack beam and the left jack supporting longitudinal beam, a left rear jack is arranged between the lower edge wing plate of the rear side of the lower stack beam and the left jack supporting longitudinal beam, a left front lifting lug is arranged at the left end of the left front beam, a left front lifting lug is connected on the left front lifting lug, a left rear lifting lug is arranged at the left end of the left rear beam, a left rear lifting lug is connected on the left rear lifting lug, and a left counterweight is arranged between the lower end of the left front lug and the left rear lug.
The left end of the left front cross beam and the left end of the left rear cross beam extend out of the left auxiliary column for 1 meter leftwards, and the right end of the left front cross beam and the right end of the left rear cross beam extend out of the left top plate beam supporting upright column for 6-8 meters rightwards.
A deflection correction method during connection of upper and lower superimposed beams comprises the following steps:
the first step, four cross beams with the same length are manufactured by H-shaped steel and serve as: a left front beam of the left jacking mechanism, a left rear beam of the left jacking mechanism, a right front beam of the right jacking mechanism and a right rear beam of the right jacking mechanism; one end of each beam is welded with a lifting lug, the other end of each beam is welded with a connecting profile steel block, and the height of the connecting profile steel block is 400 mm;
the second step, the two beams manufactured in the first step are respectively hoisted between the top end of the left auxiliary column and the top end of the left top plate beam supporting upright column, and serve as a left front beam and a left rear beam, the left front beam and the left rear beam are arranged in parallel, the distance between the left front beam and the left rear beam is 1.5-1.7 m, a left jack supporting longitudinal beam is arranged between a front connecting steel block at the right end of the left front beam and a left rear connecting steel block at the right end of the left rear beam, a left front lapping plate is connected on a left front lifting lug at the left end of the left front beam, and a left rear lapping plate is connected on a left rear lifting lug at the left end of the left rear beam;
thirdly, constructing a right jacking mechanism in the same step as the second step;
a left front jack is arranged between a lower edge wing plate at the front side of the lower stop log and a left jack supporting longitudinal beam, a left rear jack is arranged between a lower edge wing plate at the rear side of the lower stop log and the left jack supporting longitudinal beam, and a left counterweight is arranged between the lower end of a left front lapping plate and the lower end of a left rear lapping plate;
step five, installing two lifting jacks and a right counterweight in the right lifting mechanism in the same step as the step four;
and sixthly, synchronously controlling two lifting jacks in the left lifting mechanism and two lifting jacks in the right lifting mechanism, lifting the lower stoplog upwards, fastening connecting bolts of the upper stoplog and the lower stoplog when the deflection of the stoplog reaches the design value requirement, and connecting the lower stoplog and the upper stoplog into a stoplog whole.
The invention provides a site construction method with simple site operation and remarkable correction and adjustment effects for effectively correcting the deflection of the superimposed beam, improves the installation efficiency of the superimposed beam and ensures the engineering quality.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a cross-sectional view taken along A-A in fig. 1.
Description of the embodiments
The invention is described in detail below with reference to the attached drawing figures:
the utility model provides a deflection correction device when upper and lower stoplog is connected, including left roof beam support post 1, right roof beam support post 2, be provided with down stoplog 3 between left roof beam support post 1 and right roof beam support post 2, be provided with on down stoplog 4 on the stoplog 3, left side at left roof beam support post 1 is provided with left auxiliary column 5, right side at right roof beam support post 2 is provided with right auxiliary column 6, the below of lower stoplog 3 of center symmetry axle both sides between left roof beam support post 1 and right roof beam support post 2 is provided with left climbing mechanism and right climbing mechanism that the structure is identical symmetrically, left climbing mechanism's structure is: a left front cross beam 7 and a left rear cross beam 8 are respectively arranged between the top end of the left auxiliary column 5 and the top end of the left roof beam supporting upright 1 in parallel, a left front connection type steel block 9 is welded on the lower bottom surface of the right end of the left front cross beam 7, a left rear connection type steel block 10 is welded on the lower bottom surface of the right end of the left rear cross beam 8, a left jack supporting longitudinal beam 11 is welded and connected between the lower bottom surface of the left front connection type steel block 9 and the lower bottom surface of the left rear connection type steel block 10, a left front jack 12 is arranged between the lower edge wing plate of the front side of the lower stop beam 3 and the left jack supporting longitudinal beam 11, a left rear jack 13 is arranged between the lower edge wing plate of the rear side of the lower stop beam 3 and the left jack supporting longitudinal beam 11, the jack position is generally selected at a position which is 1/5 away from the stop beam end, a left front lifting lug 14 is arranged at the left end of the left front cross beam 7, a left front lifting lug 15 is connected on the left front of the left front end, a left rear lifting lug is arranged at the left end of the left rear cross beam 8, a left rear lifting lug is connected with a left rear lifting lug on the left front lifting lug 15, a left rear lifting lug is arranged at the left end of the left rear lifting lug is connected with the left rear lifting lug 15, and a left rear lifting lug is arranged between the left rear lifting lug and the left front lifting lug 15 is arranged at the left front end of the lifting lug and the lifting lug 15.
The left end of the left front cross beam 7 and the left end of the left rear cross beam 8 both extend out of the left auxiliary column 5 to the left by about 1 meter, and the right end of the left front cross beam 7 and the right end of the left rear cross beam 8 both extend out of the left roof beam supporting upright column 1 to the right by about 6-8 meters; the balance weight depends on the weight of the stack beam, and the stack beam of a general 600MW boiler can weigh about 170 tons at most, and the balance weight on one side is preferably about 100 tons.
A deflection correction method during connection of upper and lower superimposed beams comprises the following steps:
the first step, four cross beams with the same length are manufactured by H-shaped steel and serve as: a left front cross beam 7 of the left jacking mechanism, a left rear cross beam 8 of the left jacking mechanism, a right front cross beam of the right jacking mechanism and a right rear cross beam of the right jacking mechanism; one end of each beam is welded with a lifting lug, the other end of each beam is welded with a connecting profile steel block, and the height of the connecting profile steel block is 400 mm;
secondly, hoisting the two beams manufactured in the first step between the top end of the left auxiliary column 5 and the top end of the left top plate beam supporting upright column 1 respectively, wherein the left front beam 7 and the left rear beam 8 are arranged in parallel and are spaced at a distance of 1.5-1.7 m, a left jack supporting longitudinal beam 11 is arranged between a front connecting type steel block 9 at the right end of the left front beam 7 and a left rear connecting type steel block 10 at the right end of the left rear beam 8, a left front lifting lug 14 at the left end of the left front beam 7 is connected with a left front bridging plate 15, and a left rear bridging plate is connected with a left rear lifting lug at the left end of the left rear beam 8;
thirdly, constructing a right jacking mechanism in the same step as the second step;
a left front jack 12 is arranged between a lower edge wing plate at the front side of the lower stop beam 3 and a left jack support longitudinal beam 11, a left rear jack 13 is arranged between a lower edge wing plate at the rear side of the lower stop beam 3 and the left jack support longitudinal beam 11, and a left counterweight 16 is arranged between the lower end of a left front lapping plate 15 and the lower end of a left rear lapping plate;
step five, installing two lifting jacks and a right counterweight in the right lifting mechanism in the same step as the step four;
and sixthly, synchronously controlling two lifting jacks in the left lifting mechanism and two lifting jacks in the right lifting mechanism, lifting the lower stoplog 3 upwards, fastening connecting bolts of the upper stoplog and the lower stoplog when the deflection of the stoplog reaches the design value requirement, and connecting the lower stoplog 3 and the upper stoplog 4 into a whole.
Claims (3)
1. The utility model provides a deflection correction device when roof beam is connected from top to bottom, including left roof beam support post (1), right roof beam support post (2), be provided with down stoplog (3) between left roof beam support post (1) and right roof beam support post (2), be provided with stoplog (4) on lower stoplog (3), left side at left roof beam support post (1) is provided with left side and assists post (5), right side at right roof beam support post (2) is provided with right side and assists post (6), a serial communication port, below of lower stoplog (3) of central symmetry axle both sides between left roof beam support post (1) and right roof beam support post (2), be provided with left climbing mechanism and right climbing mechanism that the structure is identical symmetrically, left climbing mechanism's structure is: the left side roof beam support column comprises a left side auxiliary column (5) and a left roof beam support column (1), wherein a left front cross beam (7) and a left rear cross beam (8) are respectively arranged between the top of the left side auxiliary column (5) and the top of the left roof beam support column in parallel, a left front connection type steel block (9) is welded on the lower bottom surface of the right end of the left front cross beam (7), a left rear connection type steel block (10) is welded on the lower bottom surface of the right end of the left rear cross beam (8), a left jack support longitudinal beam (11) is welded between the lower bottom surface of the left front connection type steel block (9) and the lower bottom surface of the left rear connection type steel block (10), a left front jack (12) is arranged between the lower edge wing plate of the front side of the lower stop beam (3) and the left jack support longitudinal beam (11), a left rear jack (13) is arranged between the lower edge wing plate of the rear side of the lower stop beam (3) and the left jack support longitudinal beam (11), a left front lifting lug (14) is arranged at the left end of the left front cross beam (7), a left front lug (15) is connected on the left front lug (14), a left front lug (15) is arranged at the left rear lug (15) is arranged between the left rear lug (8) and the left rear lug (15), and the left rear lug (15) is arranged at the left front end of the left rear lug (15.
2. The deflection correction device for connecting an upper stop beam and a lower stop beam according to claim 1 is characterized in that the left end of a left front cross beam (7) and the left end of a left rear cross beam (8) extend out of a left auxiliary column (5) for 1 meter leftwards, and the right end of the left front cross beam (7) and the right end of the left rear cross beam (8) extend out of a left roof beam supporting upright column (1) for 6-8 meters rightwards.
3. A deflection correction method during connection of upper and lower superimposed beams comprises the following steps:
the first step, four cross beams with the same length are manufactured by H-shaped steel and serve as: a left front cross beam (7) of the left jacking mechanism, a left rear cross beam (8) of the left jacking mechanism, a right front cross beam of the right jacking mechanism and a right rear cross beam of the right jacking mechanism; one end of each beam is welded with a lifting lug, the other end of each beam is welded with a connecting profile steel block, and the height of the connecting profile steel block is 400 mm;
secondly, hoisting the two beams manufactured in the first step between the top end of the left auxiliary column (5) and the top end of the left top plate beam supporting column (1) respectively, wherein the two beams are used as a left front beam (7) and a left rear beam (8), the left front beam (7) and the left rear beam (8) are arranged in parallel, the distance between the two beams is 1.5-1.7 m, a left jack supporting longitudinal beam (11) is arranged between a front connecting profile steel block (9) at the right end of the left front beam (7) and a left rear connecting profile steel block (10) at the right end of the left rear beam (8), a left front lapping plate (15) is connected on a left front lifting lug (14) at the left end of the left front beam (7), and a left rear lapping plate is connected on a left rear lifting lug at the left end of the left rear beam (8);
thirdly, constructing a right jacking mechanism in the same step as the second step;
a left front jack (12) is arranged between a lower edge wing plate at the front side of the lower stop beam (3) and a left jack supporting longitudinal beam (11), a left rear jack (13) is arranged between the lower edge wing plate at the rear side of the lower stop beam (3) and the left jack supporting longitudinal beam (11), and a left counterweight (16) is arranged between the lower end of a left front lapping plate (15) and the lower end of a left rear lapping plate;
step five, installing two lifting jacks and a right counterweight in the right lifting mechanism in the same step as the step four;
and sixthly, synchronously controlling two lifting jacks in the left lifting mechanism and two lifting jacks in the right lifting mechanism, lifting the lower stoplog (3) upwards, fastening connecting bolts of the upper stoplog and the lower stoplog when the deflection of the stoplog reaches the design value requirement, and connecting the lower stoplog (3) and the upper stoplog (4) into a whole stoplog.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910647668.8A CN110273551B (en) | 2019-07-17 | 2019-07-17 | Deflection correction device and correction method for upper and lower stopbeams during connection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910647668.8A CN110273551B (en) | 2019-07-17 | 2019-07-17 | Deflection correction device and correction method for upper and lower stopbeams during connection |
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| CN110273551A CN110273551A (en) | 2019-09-24 |
| CN110273551B true CN110273551B (en) | 2024-02-09 |
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| KR101917619B1 (en) * | 2018-02-23 | 2018-11-13 | (주)카이센 | System for measuring bridge deflection |
| CN210713861U (en) * | 2019-07-17 | 2020-06-09 | 中国能源建设集团山西电力建设有限公司 | Deflection correcting device for upper and lower stoplogs during connection |
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| EP2816189A2 (en) * | 2013-06-20 | 2014-12-24 | Bubendorff | Device for correcting the vertical sag of an upper crossmember of the joinery of a closure system |
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| CN110273551A (en) | 2019-09-24 |
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