CN210713861U - Deflection correcting device for upper and lower stoplogs during connection - Google Patents
Deflection correcting device for upper and lower stoplogs during connection Download PDFInfo
- Publication number
- CN210713861U CN210713861U CN201921123669.4U CN201921123669U CN210713861U CN 210713861 U CN210713861 U CN 210713861U CN 201921123669 U CN201921123669 U CN 201921123669U CN 210713861 U CN210713861 U CN 210713861U
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- stoplog
- support post
- cross beam
- left front
- left rear
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- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 230000009194 climbing Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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Abstract
The utility model discloses a deflection correcting unit when joists from top to bottom are connected has solved how to rectify its deflection to the technological problem who accords with the design value requirement in joists from top to bottom installation. The method comprises a lower stop log (3) arranged between a left top plate supporting beam upright post (1) and a right top plate beam supporting upright post (2), an upper stop log (4) arranged on the lower stop log (3), a left auxiliary post (5) arranged on the left side of the left top plate supporting beam upright post (1), a right auxiliary post (6) arranged on the right side of the right top plate beam supporting upright post (2), a left jacking mechanism and a right jacking mechanism which are completely the same in structure are symmetrically arranged below the lower stop log (3) on two sides of a central symmetry axis between the left top plate supporting beam upright post (1) and the right top plate beam supporting upright post (2), four jacking jacks are synchronously controlled, the lower stop log (3) is jacked upwards, and when the designed stop log deflection meets the requirement, connecting bolts of the upper stop log and the lower stop log are fastened. The mounting efficiency of stoplog has been 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 stoplog and a correction method for the deflection of the stoplog, which are used when the stoplog at the top of a boiler of the large-scale thermal power plant is installed.
Background
As the pursuit of thermal efficiency, the steam parameters of the current boilers are higher and higher, and the geometrical size of the top plate beams of the steel structures for bearing the weight of the heating surfaces of the boilers 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 of the top plate beams exceeds 6 meters, and the width of the top plate beams is 1.3 meters, and the specifications of the top plate beams far exceed the size limit of road and railway transportation, so that many top plate beams are designed into the form of upper and lower superposed beams. The upper and lower joists of such roof beams are typically designed to be about 3 meters high to facilitate transportation of the roof beam from the production site to the installation site. The sequence of the on-site installation of the upper and lower folding beams is as follows: the method comprises the steps of firstly hoisting a lower stoplog to a top plate beam column through hoisting equipment, then hoisting an upper stoplog to the lower stoplog, and finally, fastening and connecting the upper stoplog and the lower stoplog together through upper and lower stoplog connecting bolts to form the top plate beam. Because the mechanical properties of the beam such as bearing capacity, deformation resistance, strength and rigidity are not simple 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 finished are far higher than those of an integral beam with the same sectional area as the integral beam. Of course, if an upward external force is applied to the beams before the connection of the upper and lower superposed surfaces is completed, the deflection of the upper and lower superposed beams is the same as the deflection of the beams during the manufacturing process, the large deflection and initial stress can be eliminated, but the external force equal to the self weight of the beams cannot be provided on the installation site, the large deflection and initial stress can influence the bearing capacity and the use safety of the roof beam, and how to install the upper and lower superposed beams leads the deflection of the finished beams and the initial stress of the finished beams to be completely the same as the deflection and the initial stress of the integral beams, which is a technical problem to be solved on the site.
Disclosure of Invention
The invention provides a deflection correction device and a deflection correction method during connection of an upper stop log and a lower stop log, which solve the technical problem of how to correct the deflection of the upper stop log and the lower stop log to meet the requirement of a design value during installation.
The invention solves the technical problems by the following technical scheme:
the utility model provides a deflection correcting unit when upper and lower stoplog is connected, 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 under on the stoplog, be provided with left side at the left side of left roof beam support post and assist the post, be provided with right side on the right side of right roof beam support post and assist the post, below the lower stoplog of the central symmetry axle both sides between left roof beam support post and right roof beam support post, be provided with the identical left climbing mechanism and the right climbing mechanism of structure symmetrically, left climbing mechanism's structure is: a left front cross beam and a left rear cross 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 column in parallel, a left front connecting section steel block is welded on the lower bottom surface of the right end of the left front cross beam, a left rear connecting section steel block is welded on the lower bottom surface of the right end of the left rear cross beam, a left jack supporting longitudinal beam is welded between the lower bottom surface of the left front connecting section steel block and the lower bottom surface of the left rear connecting section steel block, a left front jacking jack is arranged between a lower edge wing plate on the front side of the lower superposed beam and the left jack supporting longitudinal beam, a left rear jacking jack is arranged between a lower edge wing plate on the rear side of the lower superposed beam and the left jack supporting longitudinal beam, a left front lifting lug is arranged at the left end of the left front cross beam, a left front lapping plate is connected on the left front lifting lug, a left rear lifting lug is arranged at the left end of the left rear cross beam, a left, a left counterweight is arranged between the lower end of the left front lapping plate and the lower end of the left rear lapping plate.
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 supporting beam upright column for 6-8 meters rightwards.
A deflection correction method when an upper stoplog and a lower stoplog are connected comprises the following steps:
firstly, manufacturing four cross beams with the same length by using H-shaped steel as follows: the left front cross beam of the left jacking mechanism, the left rear cross beam of the left jacking mechanism, the right front cross beam of the right jacking mechanism and the right rear cross beam of the right jacking mechanism; a lifting lug is welded at one end of each cross beam, a connecting section steel block is welded at the other end of each cross beam, and the height of each connecting section steel block is 400 mm;
secondly, respectively hoisting the two cross beams manufactured in the first step between the top end of the left auxiliary column and the top end of the left top plate supporting beam upright column to serve as a left front cross beam and a left rear cross beam, wherein the left front cross beam and the left rear cross beam are arranged in parallel, the distance between the left front cross beam and the left rear cross beam is 1.5-1.7 m, a left jack supporting longitudinal beam is arranged between a front connecting section steel block at the right end of the left front cross beam and a left rear connecting section steel block at the right end of the left rear cross beam, a left front lap plate is connected to a left front lifting lug at the left end of the left front cross beam, and a left rear lap plate is connected to a left rear lifting lug at the left end of the left rear cross;
thirdly, building a right jacking mechanism by the same steps as the second step;
fourthly, arranging a left front jacking jack between a lower edge wing plate on the front side of the lower stoplog and a left jack support longitudinal beam, arranging a left rear jacking jack between a lower edge wing plate on the rear side of the lower stoplog and the left jack support longitudinal beam, and arranging a left counterweight between the lower end of a left front lapping plate and the lower end of a left rear lapping plate;
fifthly, installing two jacking jacks and a right balance weight in the right jacking mechanism by the same steps as the fourth step;
and sixthly, synchronously controlling two jacking jacks in the left jacking mechanism and two jacking jacks in the right jacking mechanism, jacking the lower stoplog upwards, fastening connecting bolts of the upper stoplog and the lower stoplog when the deflection of the stoplog meets the design value requirement, and connecting the lower stoplog and the upper stoplog into a whole stoplog.
The invention provides a field construction method which is simple in field operation and obvious in correction and adjustment effect for effectively correcting the deflection of the laminated beam, improves the installation efficiency of the laminated beam and ensures the quality of engineering.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a sectional view taken along line a-a in fig. 1.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
the utility model provides a deflection correcting unit when upper and lower stoplog is connected, including left roof beam support post 1, right roof beam support post 2, be provided with stoplog 3 down between left roof beam support post 1 and right roof beam support post 2, be provided with stoplog 4 on stoplog 3 down, it assists post 5 to be provided with a left side in left roof beam support post 1's left side, it assists post 6 to be provided with the right side on right roof beam support post 2's right side, the below of the lower stoplog 3 of the central symmetry axle both sides between left roof beam support post 1 and right roof beam support post 2, be provided with the identical left climbing mechanism and the right climbing mechanism of structure symmetrically, left climbing mechanism's structure does: 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 top plate supporting beam upright post 1 in parallel, a left front connecting section steel block 9 is welded on the lower bottom surface of the right end of the left front cross beam 7, a left rear connecting section 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 between the lower bottom surface of the left front connecting section steel block 9 and the lower bottom surface of the left rear connecting section steel block 10, a left front jacking jack 12 is arranged between the lower flange plate of the front side of the lower superposed beam 3 and the left jack supporting longitudinal beam 11, a left rear jacking jack 13 is arranged between the lower flange plate of the rear side of the lower superposed beam 3 and the left jack supporting longitudinal beam 11, the jacking position is generally selected at the position 1/5 away from the superposed beam end, a left front lifting lug 14 is arranged at the left end of the left front cross beam 7, a left front lapping plate 15 is connected on the left, a left rear lifting lug is arranged at the left end of the left rear cross beam 8, a left rear lapping plate is connected to the left rear lifting lug, and a left balance weight 16 is arranged between the lower end of the left front lapping plate 15 and the lower end of the left rear lapping plate.
The left end of the left front cross beam 7 and the left end of the left rear cross beam 8 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 extend out of the left top plate supporting beam upright column 1 to the right by about 6-8 meters; the weight depends on the weight of the stack, and the stack of a 600MW boiler generally weighs about 170 tons at most, and the weight of a single side is preferably about 100 tons.
A deflection correction method when an upper stoplog and a lower stoplog are connected comprises the following steps:
firstly, manufacturing four cross beams with the same length by using H-shaped steel as follows: 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; a lifting lug is welded at one end of each cross beam, a connecting section steel block is welded at the other end of each cross beam, and the height of each connecting section steel block is 400 mm;
secondly, respectively hoisting the two manufactured cross beams in the first step between the top end of the left auxiliary column 5 and the top end of the left top plate supporting beam upright post 1 to serve as a left front cross beam 7 and a left rear cross beam 8, wherein the left front cross beam 7 and the left rear cross beam 8 are arranged in parallel, the distance between the left front cross beam 7 and the left rear cross beam 8 is 1.5-1.7 m, a left jack supporting longitudinal beam 11 is arranged between a front connecting section steel block 9 at the right end of the left front cross beam 7 and a left rear connecting section steel block 10 at the right end of the left rear cross beam 8, a left front lifting lug 14 at the left end of the left front cross beam 7 is connected with a left front lapping plate 15, and a left rear lapping plate is connected with a left rear lifting lug at the left end of the left;
thirdly, building a right jacking mechanism by the same steps as the second step;
fourthly, arranging a left front jacking jack 12 between a lower edge wing plate on the front side of the lower stoplog 3 and the left jack support longitudinal beam 11, arranging a left rear jacking jack 13 between a lower edge wing plate on the rear side of the lower stoplog 3 and the left jack support longitudinal beam 11, and arranging a left counterweight 16 between the lower end of a left front lapping plate 15 and the lower end of a left rear lapping plate;
fifthly, installing two jacking jacks and a right balance weight in the right jacking mechanism by the same steps as the fourth step;
and sixthly, synchronously controlling two jacking jacks in the left jacking mechanism and two jacking jacks in the right jacking mechanism to jack the lower laminated beam 3 upwards, fastening connecting bolts of the upper laminated beam and the lower laminated beam when the deflection of the laminated beam meets the requirement of a design value, and connecting the lower laminated beam 3 and the upper laminated beam 4 into a laminated beam whole.
Claims (2)
1. The utility model provides a deflection correcting unit when upper and lower stoplog is connected, including left roof beam support post (1), right roof beam support post (2), be provided with stoplog (3) down between left roof beam support post (1) and right roof beam support post (2), be provided with stoplog (4) down on stoplog (3), left side at left roof beam support post (1) is provided with left auxiliary pillar (5), right side at right roof beam support post (2) is provided with right auxiliary pillar (6), a serial communication port, below the 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 the left climbing mechanism and the right climbing mechanism that the structure is the same completely symmetrically, the structure of left side climbing mechanism does: 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 top plate beam supporting column (1) in parallel, a left front connecting section steel block (9) is welded on the lower bottom surface of the right end of the left front cross beam (7), a left rear connecting section steel block (10) is welded on the lower bottom surface of the right end of the left rear cross beam (8), a left front jacking jack (12) is arranged between the lower edge wing plate of the front side of the lower superposed beam (3) and the left jack supporting longitudinal beam (11), a left rear jacking jack (13) is arranged between the lower edge wing plate of the rear side of the lower superposed beam (3) and the left jack supporting longitudinal beam (11), a left front lifting lug (14) is arranged at the left end of the left front cross beam (7), the left front lifting lug (14) is connected with a left front lapping plate (15), the left end of the left rear cross beam (8) is provided with a left rear lifting lug, the left rear lifting lug is connected with a left rear lapping plate, and a left counterweight (16) is arranged between the lower end of the left front lapping plate (15) and the lower end of the left rear lapping plate.
2. The deflection correction device when an upper and lower stoplog are connected according to claim 1, characterized in that the left end of the left front beam (7) and the left end of the left rear beam (8) both project 1 meter to the left of the left auxiliary column (5), and the right end of the left front beam (7) and the right end of the left rear beam (8) both project 6-8 meters to the right of the left top beam support column (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921123669.4U CN210713861U (en) | 2019-07-17 | 2019-07-17 | Deflection correcting device for upper and lower stoplogs during connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921123669.4U CN210713861U (en) | 2019-07-17 | 2019-07-17 | Deflection correcting device for upper and lower stoplogs during connection |
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| Publication Number | Publication Date |
|---|---|
| CN210713861U true CN210713861U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921123669.4U Withdrawn - After Issue CN210713861U (en) | 2019-07-17 | 2019-07-17 | Deflection correcting device for upper and lower stoplogs during connection |
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| Country | Link |
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| CN (1) | CN210713861U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273551A (en) * | 2019-07-17 | 2019-09-24 | 中国能源建设集团山西电力建设有限公司 | Amount of deflection means for correcting and bearing calibration when upper and lower stoplog connection |
-
2019
- 2019-07-17 CN CN201921123669.4U patent/CN210713861U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273551A (en) * | 2019-07-17 | 2019-09-24 | 中国能源建设集团山西电力建设有限公司 | Amount of deflection means for correcting and bearing calibration when upper and lower stoplog connection |
| CN110273551B (en) * | 2019-07-17 | 2024-02-09 | 中国能源建设集团山西电力建设有限公司 | Deflection correction device and correction method for upper and lower stopbeams during connection |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200609 Effective date of abandoning: 20240209 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200609 Effective date of abandoning: 20240209 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |