CN109611818B - Lifting device and lifting method for convection superheater - Google Patents
Lifting device and lifting method for convection superheater Download PDFInfo
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- CN109611818B CN109611818B CN201811433023.6A CN201811433023A CN109611818B CN 109611818 B CN109611818 B CN 109611818B CN 201811433023 A CN201811433023 A CN 201811433023A CN 109611818 B CN109611818 B CN 109611818B
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- jacking
- base
- lifting
- convection superheater
- superheater
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/24—Supporting, suspending, or setting arrangements, e.g. heat shielding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
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Abstract
The invention discloses a lifting device for a convection superheater, which comprises a jacking base, a jacking bracket, a jacking piece and a base plate, wherein the jacking bracket is arranged on the jacking base; the jacking base comprises a top part and side parts extending downwards from two sides of the top part, and the bottom ends of the two side parts of the jacking base are fixed on a frame beam of the boiler when in use; when in use, the base plate is arranged between a first nut which is in threaded connection with a hanger rod of the convection superheater and a frame beam of the boiler; the jacking support comprises a jacking seat and a jacking rod, the bottom end of the jacking rod is connected with a second nut, the second nut is in threaded connection with the suspension rod above the first nut when in use, and the top end of the jacking rod penetrates through the top of the jacking base to be connected with the jacking seat; the jacking piece is fixed on the jacking base and is positioned between the jacking base and the top base; the axes of the jacking piece, the jacking bracket and the jacking base are overlapped. Through using this to promoting device to STREAMING over heater to promote to STREAMING over heater, can carry out the whole promotion to STREAMING over heater, guaranteed the safe operation of unit.
Description
Technical Field
The invention relates to a maintenance technology of a convection superheater, in particular to a lifting device of the convection superheater and a lifting method of the convection superheater.
Background
In a power station boiler, a vertical convection superheater is usually arranged in a horizontal flue and a slope flue at the outlet of a hearth, and the vertical convection superheater has the advantages of simple structure and convenience in hanging. Along with the increase of the operating years of the boiler, after the vertical convection superheater coiled pipe is subjected to long-term expansion and contraction, expansion of the coiled pipe and partial subsidence in a severe environment, the phenomenon that the top slope flue water-cooled wall is formed at the bottom of the superheater can seriously affect the safe operation of a unit.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a lifting device of a convection superheater and a lifting method of the convection superheater.
The technical scheme adopted by the invention for solving the technical problems is as follows: a convection superheater lifting device comprises a jacking base, a jacking bracket, a jacking piece and a base plate;
the jacking base comprises a top part and side parts extending downwards from two sides of the top part, and the bottom ends of the two side parts of the jacking base are fixed on a frame beam of the boiler when in use;
when in use, the base plate is arranged between a first nut which is in threaded connection with a hanger rod of the convection superheater and a frame cross beam of the boiler;
the jacking support comprises a jacking seat and more than two jacking rods, the bottom ends of the jacking rods are connected with second nuts, the second nuts are in threaded connection with the suspension rods above the first nuts when in use, and the top ends of the jacking rods penetrate through the top of the jacking base and are connected with the jacking seat;
the jacking piece is fixed on the jacking base and is positioned between the jacking base and the top base;
the axes of the jacking piece, the jacking support and the jacking base are overlapped.
Optionally, the footstock is detachably connected with the top of the jacking rod.
Optionally, a first through hole for inserting the jacking rod is formed in the top seat, the diameter of the jacking rod is smaller than that of the first through hole, and a stop block is connected to the end of the top of the jacking rod penetrating through the first through hole.
Optionally, a threaded hole matched with the bottom of the lifting rod is formed in the surface of the second nut, and the bottom of the lifting rod is in threaded connection with the second nut.
Optionally, the jacking member is a screw jack.
Optionally, the backing plates include a first backing plate and a second backing plate, the first backing plate is at least one and used for temporarily cushioning between the first nut and the frame beam of the boiler, and the second backing plate is used for permanently cushioning between the first nut and the frame beam of the boiler.
Optionally, the first backing plate includes two half portions, the side edges of the first backing plate of the two half portions are respectively provided with a semicircular notch, and the two notches are butted to form a circular hole, and the diameter of the hole is adapted to the outer diameter of the hanger rod.
Optionally, the second backing plate includes two half portions, the side edges of the second backing plate of the two half portions are respectively provided with a semicircular notch, and the two notches are butted to form a circular hole, and the diameter of the hole is adapted to the outer diameter of the hanger rod.
The invention also provides a convection superheater lifting method using the convection superheater lifting device, which comprises the following steps:
installing the convection superheater lifting devices with the same number as the suspenders of the convection superheater, fixing a jacking base of the convection superheater lifting device on a frame cross beam of the boiler, and connecting a jacking support of the convection superheater lifting device with the suspenders in a threaded manner;
simultaneously jacking all jacking pieces, jacking up the convection superheater, and keeping all booms of the convection superheater to be level;
placing a base plate pad between the first nut and a frame beam of the boiler;
and (4) removing the convection superheater lifting device.
Optionally, in the process of jacking the convection superheater, a first base plate is placed between the first nut and the frame cross beam of the boiler for temporarily supporting the hanger rod, when the convection superheater is lifted to a specified height, the first base plate is taken away, and a second base plate is placed between the first nut and the frame cross beam of the boiler for permanently supporting the hanger rod.
The invention solves the problem of integral lifting of the vertical convection type superheater by using the lifting device of the convection type superheater when lifting the convection type superheater, saves the operation time when integrally lifting the convection type superheater, reduces the labor intensity, improves the working efficiency, reduces the construction difficulty, improves the safety factor, ensures the safety of personnel and eliminates the potential safety hazard of the convection type superheater.
Drawings
FIG. 1 is a front view of a convection superheater lifting apparatus of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of the construction of a first caul sheet of the present invention;
fig. 4 is a schematic structural view of a second mat according to the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 and 2, the invention discloses a lifting device for a convection superheater, which comprises a jacking base 1, a jacking support 2, a jacking piece 3 and a backing plate 4, wherein the jacking base 1 is connected to a frame beam 5 of a boiler, the jacking support 2 is in threaded connection with a boom 6 of the convection superheater, the jacking piece 3 is fixed on the jacking base 1 and is arranged between the jacking base 1 and the jacking support 2 for jacking up the jacking support 2, the backing plate 4 is connected to a position, between a first nut 601 and the frame beam 5 of the boiler, of the boom 6 of the convection superheater for padding the boom 6, wherein the first nut 601 is a nut provided on the boom 6. In the well-made lifting device for the convection superheater, the axes of the jacking piece 3, the jacking support 2 and the jacking base 1 are overlapped, so that the stability of the whole lifting device for the convection superheater is ensured. In this embodiment, the lifting member 3 may be a screw jack, for example, and in another embodiment, the lifting member 3 may be a hydraulic jack or other jacks, for example.
Specifically, when the jacking base 1 is manufactured, the jacking base is manufactured into a doorframe shape, the screw jack is fixedly installed in the middle of the top of the jacking base 1, and the bottoms of two sides of the jacking base 1 are fixedly connected with the frame cross beam 5 of the boiler, such as welding or other fixing modes. The height of the jacking base 1 is determined by that the distance from the bottom of the door frame beam of the jacking base 1 to the top of the suspender 6 is not less than the lifting height of the convection superheater, for example, the lifting height of the convection superheater is 20mm, and then the distance from the bottom of the door frame beam of the jacking base 1 to the top of the suspender 6 is at least 20mm, so as to make room for lifting the convection superheater.
The jacking bracket 2 comprises a jacking rod 201 and a jacking seat 202, the bottom of the jacking rod 201 is in threaded connection with the suspension rod 6 through a second nut 203, and the jacking seat 202 is detachably connected with the top of the jacking rod 201. In this embodiment, the lifting rod 201 may be, for example, a screw rod, which can be directly obtained at a construction site, which saves cost, in each convection superheater lifting apparatus, the number of the screw rods may be, for example, 4, the screw rods are distributed along a circumference, and the bottom of the screw rods is connected with the second nut 203, the top surface of the second nut 203 may be further provided with, for example, 4 screw holes for being in threaded connection with the bottom of the screw rods, the number of the screw holes is consistent with the number of the screw rods, the screw holes are uniformly distributed along the same circumference, the top base 202 is also provided with first through holes 204 for screw rod insertion, the number of the first through holes 204 is consistent with the number of the screw rods, the aperture of the first through holes 204 is larger than the diameter of the screw rods, so that the screw rods can be freely inserted in the first through holes 204, meanwhile, the top of the screw rod stoppers 205 are provided with a stopper 205, for the purpose of forcing the screw by the top seat 201 when lifting the superheater. A second through hole 101 for inserting a screw is also formed in the doorframe cross beam of the jacking base 1. When the screw is installed, the bottom of the screw sequentially penetrates through the first through hole 204 and the second through hole 101 from top to bottom, and then the bottom of the screw is in threaded connection with the screw hole on the second nut 203. It is noted that the central threaded hole of the second nut 203 is a natural threaded hole for attaching the suspension bar 6, while the threaded holes evenly distributed along the top surface of the second nut 203 are now open threaded holes for attaching the screw rods.
In another embodiment, a double nut may be used to clamp and fix the top of the screw to the top seat 201, so as to facilitate the detachable connection of the screw.
As shown in fig. 3 and 4, the backing plate 4 includes a first backing plate 401 for temporarily cushioning between the first nut 601 of the hanger bar 6 and the frame cross member 5 of the boiler, and a second backing plate 402 for permanently cushioning between the first nut 601 of the hanger bar 6 and the frame cross member 5 of the boiler.
The first backing plate 401 includes two half portions, the side edges of the first backing plate 401 of the two half portions are respectively provided with a semicircular notch, and the two notches are butted to form a circular hole, and the diameter of the circular hole is adapted to the outer diameter of the hanger rod 6.
The second backing plate 402 comprises two half parts, the side edges of the second backing plate 402 of the two half parts are respectively provided with a semicircular notch, and the two notches are butted to form a circular hole, and the diameter of the circular hole is adapted to the outer diameter of the hanger rod 6.
When the first shim plate 401 is manufactured, a plurality of first shim plates 401 can be manufactured, the thicknesses of the first shim plates 401 increase gradually in sequence, and therefore the requirement that the first shim plates 401 with corresponding thicknesses are replaced in sequence to be padded in the process of lifting the convection superheater is met. The thickness of the second shim plate 402 corresponds to the height of the final lifted convection superheater.
When the base plate 4 is manufactured, the base plate with the corresponding thickness is taken, then the hole is drilled in the middle of the base plate, and after the hole is drilled, the base plate 4 is cut into two halves along the axis of the hole. After the second pad 402 is drilled, the end faces of the two ends are milled flat and then cut into two halves.
When the convection type superheater lifting device is manufactured, the corresponding number of lifting devices are manufactured according to the number of the lifting rods 6, and meanwhile, the sum of rated lifting weights of the lifting pieces 3 in all the lifting devices is larger than the total weight of the convection type superheater. In this embodiment, the number of booms 6 may be 4, for example, and the number of lifting devices is 4, one lifting device being mounted on each boom 6.
When the convection superheater lifting device is used for lifting the convection superheater, the process is as follows:
s1, sequentially fixing the jacking base 1 of the convection superheater lifting device on a frame cross beam 5 of the boiler, and connecting the jacking support 2 of the convection superheater lifting device with a suspender 6 in a threaded manner.
S2, simultaneously jacking all the jacking pieces 3, jacking up the convection superheater, and keeping all booms 6 of the convection superheater to be level;
in the process of jacking the convection superheater, firstly jacking one end of a suspender 6 upwards for a distance, then padding a first base plate 401 with the minimum thickness between a first nut 601 and a frame beam 5 of the boiler for temporarily supporting the suspender 6, checking whether a lifting device is normal or not, checking whether the convection superheater is normally lifted or not, and analogizing the same, continuing to jack the suspender 6 upwards again, taking away the first base plate 401 when the convection superheater is lifted to a specified height, and replacing the first base plate with a second base plate 402 for permanently supporting the suspender 6.
S3, checking whether the gap between the bottom of the serpentine tube row of the convection superheater and the water wall meets the requirement or not, and whether the gap between the top of the serpentine tube and the ceiling meets the requirement or not.
And S4, welding the seam of the two half parts of the second backing plate 402 after the second backing plate is qualified, and removing the convection superheater lifting device.
The invention solves the problem of integral lifting of the vertical convection type superheater by using the lifting device of the convection type superheater when lifting the convection type superheater, saves the operation time when integrally lifting the convection type superheater, reduces the labor intensity, improves the working efficiency, reduces the construction difficulty, improves the safety factor, ensures the safety of personnel and eliminates the potential safety hazard of the convection type superheater.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Other technical features than those described in the specification are known to those skilled in the art, and are not described herein in detail in order to highlight the innovative features of the present invention.
Claims (10)
1. A convection superheater lifting device is characterized in that:
the convection superheater lifting device comprises a jacking base, a jacking bracket, a jacking piece and a base plate;
the jacking base comprises a top part and side parts extending downwards from two sides of the top part, and the bottom ends of the two side parts of the jacking base are fixed on a frame beam of the boiler when in use;
when in use, the base plate is arranged between a first nut which is in threaded connection with a hanger rod of the convection superheater and a frame cross beam of the boiler;
the jacking support comprises a jacking seat and more than two jacking rods, the bottom ends of the jacking rods are connected with second nuts, the second nuts are in threaded connection with the suspension rods above the first nuts when in use, and the top ends of the jacking rods penetrate through the top of the jacking base and are connected with the jacking seat;
the jacking piece is fixed on the jacking base and is positioned between the jacking base and the top base;
the axes of the jacking piece, the jacking support and the jacking base are overlapped.
2. A convection superheater lifting apparatus as set forth in claim 1, wherein said top seat is removably connected to a top portion of said lift rod.
3. A convection superheater lifting device as claimed in claim 1 or 2, wherein the top seat is provided with a first through hole for inserting a lifting rod, the diameter of the lifting rod is smaller than that of the first through hole, and a stop block is connected to the top of the lifting rod at the end penetrating through the first through hole.
4. A convection superheater lifting device as claimed in claim 1, wherein the second nut has a threaded hole formed in a surface thereof for mating with a bottom of the lifting rod, and the bottom of the lifting rod is threadedly coupled with the second nut.
5. A convective superheater lifting apparatus as set forth in claim 1, wherein said jacking member is a screw jack.
6. A convection superheater lifting apparatus as set forth in claim 1, wherein said shim plate includes a first shim plate and a second shim plate, said first shim plate being at least one for temporarily cushioning between said first nut and a frame beam of a boiler, said second shim plate for permanently cushioning between said first nut and a frame beam of a boiler.
7. A convection superheater lifting device as set forth in claim 6, wherein the first pad includes two halves, the first pad has semicircular notches on its side edges, and the two notches are butted to form a circular hole having a diameter corresponding to the outer diameter of the hanger bar.
8. A convection superheater lifting device as claimed in claim 6 or 7, wherein the second pad comprises two halves, the second pad of the two halves has semicircular notches on the side edges, and the two notches are butted to form a circular hole, and the diameter of the circular hole is adapted to the outer diameter of the hanger rod.
9. A method of lifting a convective superheater using the convective superheater lifting apparatus of claim 1, comprising the steps of:
installing the convection superheater lifting devices with the same number as the suspenders of the convection superheater, fixing a jacking base of the convection superheater lifting device on a frame cross beam of the boiler, and connecting a jacking support of the convection superheater lifting device with the suspenders in a threaded manner;
simultaneously jacking all jacking pieces, jacking up the convection superheater, and keeping all booms of the convection superheater to be level;
placing a base plate pad between the first nut and a frame beam of the boiler;
and (4) removing the convection superheater lifting device.
10. A method for lifting a convection superheater as claimed in claim 9, wherein during the lifting of the convection superheater, a first pad is placed between the first nut and the frame beam of the boiler for temporarily supporting the hanger rod, the first pad is removed when the convection superheater is lifted to a predetermined height, and a second pad is placed between the first nut and the frame beam of the boiler for permanently supporting the hanger rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811433023.6A CN109611818B (en) | 2018-11-28 | 2018-11-28 | Lifting device and lifting method for convection superheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811433023.6A CN109611818B (en) | 2018-11-28 | 2018-11-28 | Lifting device and lifting method for convection superheater |
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| Publication Number | Publication Date |
|---|---|
| CN109611818A CN109611818A (en) | 2019-04-12 |
| CN109611818B true CN109611818B (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811433023.6A Active CN109611818B (en) | 2018-11-28 | 2018-11-28 | Lifting device and lifting method for convection superheater |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113357664B (en) * | 2021-07-02 | 2024-05-07 | 河南省安装集团有限责任公司 | Boiler membrane water wall elevation adjustment hanging device and application method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012042185A (en) * | 2010-08-23 | 2012-03-01 | Mitsubishi Heavy Ind Ltd | Clamper, and in-water-chamber operation device |
| CN205575407U (en) * | 2016-05-07 | 2016-09-14 | 中国能源建设集团东北电力第一工程有限公司 | Boiler drum hoisting device |
| GB2559124B (en) * | 2017-01-25 | 2022-09-21 | Clevatech Ltd | Flue mounted hoist |
| CN207394811U (en) * | 2017-09-18 | 2018-05-22 | 中国神华能源股份有限公司 | Suspension apparatus |
| CN108545631B (en) * | 2018-04-03 | 2019-10-18 | 河南中盟电气设备有限公司 | A kind of elevating method of large scale electrical power unit installation |
| CN108483230A (en) * | 2018-05-19 | 2018-09-04 | 中国能源建设集团山西电力建设第三有限公司 | A kind of the sunpender regulating mechanism and adjusting method of thermal power plant's suspention boiler |
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