CN102777925B - Sealing device of steam admission side of rotary boiler fan heater in steam admission by single pipe - Google Patents
Sealing device of steam admission side of rotary boiler fan heater in steam admission by single pipe Download PDFInfo
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- CN102777925B CN102777925B CN201210240977.1A CN201210240977A CN102777925B CN 102777925 B CN102777925 B CN 102777925B CN 201210240977 A CN201210240977 A CN 201210240977A CN 102777925 B CN102777925 B CN 102777925B
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- circular arc
- cover plate
- cover board
- sealing
- arc cover
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- 238000007789 sealing Methods 0.000 title claims abstract description 90
- 239000002184 metal Substances 0.000 claims abstract description 20
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012938 design process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention discloses a sealing device of a steam admission side of a rotary boiler fan heater in steam admission by a single pipe. An arc hole for rotating a steam inlet pipe is arranged on an air flue cover board; a central angle corresponding to the arc hole is 90 degrees; a round hole on a sealed arc cover board is sleeved on the steam inlet pipe, and covered on the arc hole of the air flue cover board; the central angle corresponding to the sealed arc cover board is 180 degrees and concentric with the arc hole; a plurality of U-shaped brackets are fixed on the sealed arc cover board; a plurality of rotatable pressure blocks are L-shaped and arranged on the periphery of the arc hole; thick ends are fixed on the air flue cover board; thin ends are pressed on the sealed arc cover board; end part locating metal blocks of which shapes are matched with the arc end part of the sealed arc cover board are fixed on the arc end part of the sealed arc cover board; the end part pressure blocks are L-shaped; thick ends are pressed on the sealed arc cover board, and thin ends are fixed on the end part locating metal blocks. On the basis of playing a good sealing action and achieving an effective rotary operation, the mounting cost is reduced, and the sealing device has a good popularization and application value.
Description
Technical field
The present invention relates to a kind of sealing device of Scotch boiler steam air heater, the sealing device of steam admission side while being specifically related to a kind of Scotch boiler steam air heater single tube admission.
Background technology
Boiler Air Heater's is a kind of heat transmission equipment that utilizes extracted steam from turbine preheating to enter the cold air of air preheater, be widely used in northern China thermal power station, mainly be divided into wind steam air heater and Secondary Air steam air heater, its structure and principle are basic identical, act as and improve air preheater cold-end air temperature, prevent the generation cold end corrosion of air preheater cold-end air heating surface and clogging phenomenon.Scotch boiler steam air heater, owing to can effectively reducing the stop transport duct resistance of phase of steam air heater, reduces pressure fan power consumption, contributes to improve the economy and security of power plant, and has the advantages such as transformation is simple and be widely applied.The arrangement of common steam air heater has vertical, horizontal and side formula, with regard to its performance, does not have significant difference, generally according to physical condition, selects flexibly.The steam air heater that side formula is arranged generally has a steam inlet pipe and a drain pipe, and both are arranged in steam air heater body rotation both sides.This structure need to be opened for steam inlet pipe and complete and throw the arcuate socket that stops switching rotation on air duct cover board, if arcuate socket can not get good sealing, leaking out in the air channel that may cause will be extremely unfavorable to the safety and economic operation of unit.Rotary air heater is arranged in air channel simultaneously, is difficult for determining its particular location when switching rotation, makes the fixing quite inconvenience of rotary air heater.
Chinese patent CN101825288A, name is called " a kind of sealing device of boiler rotary air heater ", be by half degree of lip-rounding structure welding on air duct board, by bolt, annulus cover plate is pressed on air duct board, such design is applicable to the rotary air heater of the vertical of two-tube admission, be applied to that the side formula of single tube admission arranges rotary air heater will mainly there are the following problems:
1) rotating hole of steam admission side quadrant arc only during the admission of Scotch boiler steam air heater single tube, adopts circular ring structure sealing to cause certain waste of material, and when switching rotation because contact area conference increases frictional resistance;
2) half degree of lip-rounding structure can not be welded too much, otherwise affects the movement of rotary air heater steam supply pipe in rotary course, on the top of air duct board arcuate socket, can not weld half degree of lip-rounding structure, and this has just affected compression effect;
3) rotary actuator of common Scotch boiler steam air heater is generally worm mechanism, and this structure is without frequent use, and cost is higher, and the rotating shaft place of drawing need to seal, to prevent that air channel from leaking out;
4) while switching rotation, be difficult for externally realizing location, positioned internal may cause greater impact power, is unfavorable for the safety of steam air heater.
Summary of the invention
For solving above-mentioned problems of the prior art, the sealing device of steam admission side while the object of the present invention is to provide a kind of Scotch boiler steam air heater single tube admission, have safe and reliable easy to operate, simple in structure, use material saving, the little feature that takes up room, can play good sealing effectiveness and realize on effective rotary manipulation basis, reduce installation cost, there is good application value.
For achieving the above object, the technical solution adopted in the present invention is:
The sealing device of steam admission side during a kind of Scotch boiler steam air heater single tube admission, on air duct cover board 6, have the arcuate socket 5 rotating for steam inlet pipe 3, the central angle of described arcuate socket 5 correspondences is 90 °, circle hole sleeve on sealing circular arc cover plate 1 on steam inlet pipe 3 after, cover on the arcuate socket 5 of air duct cover board 6, the central angle of described sealing circular arc cover plate 1 correspondence is 180 ° and concentric with arcuate socket 5, a plurality of U-shaped supports 2 are fixed on sealing circular arc cover plate 1, a plurality of briquettings 9 that turn are for L-type, be arranged in arcuate socket 5 peripheries, its thick end is fixed on air duct cover board 6, thin side pressure is on sealing circular arc cover plate 1, on air duct cover board 6 tops, the arc end part of sealing circular arc cover plate 1 is fixed with the suitable end positioning metal piece 14 of arc end part of shape and sealing circular arc cover plate 1, end briquetting 15 is L-type, its thick side pressure is on sealing circular arc cover plate 1, Bao Duan is fixed on end positioning metal piece 14, two ends that are fixed on sealing circular arc cover plate 1 of rotating handles 12 symmetries.
In the circular arc side of described end positioning metal piece 14 and the arc end part joint of sealing circular arc cover plate 1, be lined with rubber sheet gasket 13.
The thickness that the described difference in height that turns Mian Hehou bottom, the thin bottom face of briquetting 9 is sealing circular arc cover plate 1.
The thickness sum of described end positioning metal piece 14 and end briquetting 15 thin ends equates with the thickness sum of sealing circular arc cover plate 1 and end briquetting 15 thick ends.
Rotary air heater of the present invention has for steam inlet pipe 3 and completes and throw the arcuate socket 5 that stops switching rotation on air duct cover board 6, the corresponding central angle of arcuate socket 5 is 90 °, and the central angle of sealing circular arc cover plate 1 correspondence is 180 °, therefore at steam air heater during no matter at any state, on the arcuate socket 5 that sealing circular arc cover plate 1 covers all the time on air duct cover board 6, circular hole 5 has all obtained good sealing, needn't need annulus.Can turn briquetting 9 and be arranged in arcuate socket periphery, mainly to leak out relatively seriously and the less situation of pressure point near improving arcuate socket, the thickness that the difference in height that can turn Mian Hehou bottom, the thin bottom face of briquetting is sealing circular arc cover plate 1, this can be avoided the bending of screw unbalance stress and make the bad problem that cannot screw of screw-threaded engagement.Hold-down screw is thrown in stoppage in transit handoff procedure without back-out at Scotch boiler steam air heater.Two end positioning metal pieces 14 seal circular arc cover plate 1 position, end while being separately fixed at corresponding rotation formula steam air heater throwing stoppage in transit, played the effect that realizes rotary air heater location in outside, air channel, rubber sheet gasket 13 has played the effect of buffering end positioning metal piece 14 and sealing circular arc cover plate 1 end collision impact power.End briquetting 15 and dog screw play the effect of press seal circular arc patch ends, press 9 tight principles similar with turning briquetting, the thickness sum of end positioning metal piece 14 and end briquetting 15 thin ends equates with the thickness sum of sealing circular arc cover plate 1 and end briquetting 15 thick ends.The boiler rotary air heater sealing device that the present invention proposes is not only safe and reliable easy to operate, simple in structure, with material, saves, take up room little, playing good sealing effectiveness and realizing on effective rotary manipulation basis, reduced installation cost, there is good application value.
Compared to the prior art, advantage of the present invention is as follows:
1) steam admission side adopts sealing circular arc cover plate 1 to save to a great extent raw material during the admission of Scotch boiler steam air heater single tube, and can reduce the frictional resistance when switching rotation;
2) can be at arcuate socket 5 peripheries as the case may be, increase can turn the number of briquetting 9, guarantees to seal the compression effect of 6 of circular arc cover plate 1 and air duct cover boards; Near steam inlet tube, adopt containing the hold down gag that can turn briquetting; Hold down gag at sealing circular arc cover plate 1 employing end, end positioning metal piece 14 and end briquetting 15.Sealing adopts three kinds of compression modes to guarantee sealing effectiveness, U-shaped support 2, can turn briquetting 9 and end briquetting 15, the multiple choices of press-fit type have guaranteed sealing effectiveness;
3) can rotating handles realize the switching rotation of steam air heater, without adopting rotary executive device, saved installation cost, also omitted the sealing problem at rotating shaft place.
4) externally install positioner additional, and adopt rubber sheet gasket, effectively prevent rigid shock, and the rubber sheet gasket damaging is easily changed.
Accompanying drawing explanation
Fig. 1 is rotary air heater rotational structure and steam inlet pipe arrangement schematic diagram.
Fig. 2 is that rotary air heater is installed into the schematic diagram after steam pipe sealing device.
Fig. 3 is A-A partial sectional view.
Fig. 4 is B-B partial sectional view.
Fig. 5 is C-C partial sectional view.
Fig. 6 is D-D partial sectional view.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As depicted in figs. 1 and 2, the sealing device of steam admission side during the admission of a kind of Scotch boiler steam air heater of the present invention single tube, the steam inlet pipe 3 of rotary air heater is non-to distribute along axis, on air duct cover board 6, have the arcuate socket 5 rotating for steam inlet pipe 3, the central angle of described arcuate socket 5 correspondences is 90 °, circle hole sleeve on sealing circular arc cover plate 1 on steam inlet pipe 3 after, cover on the arcuate socket 5 of air duct cover board 6, the central angle of described sealing circular arc cover plate 1 correspondence is 180 ° and concentric with arcuate socket 5, width is looked the wide 60-100mm of the comparable arcuate socket 5 of erecting bed situation, a plurality of U-shaped supports 2 are welded on sealing circular arc cover plate 1, welding position is symmetrical about sealing circular arc cover plate 1 center line, crossbeam by U-shaped support 2 will seal circular arc cover plate 1 and air duct cover board 6 compressions, radially evenly compress and be conducive to arcuate socket sealing, U-shaped support 2 rotates with sealing circular arc cover plate 1, do not hinder the switching rotation of steam air heater, avoided due to bolt compress compress near the bolt hole may causing seal the 1 edge perk of circular arc cover plate cause leak out etc. problem, this kind of compression mode is main compression mode of the present invention.
As shown in Figure 3, at air duct cover board 6, open screwed hole 8, on U-shaped support 2 and sealing circular arc cover plate 1, open hole 7, sealing screw 4 inserts through holes 7 afterwards and screwed hole 8 is tightened, and the diameter of through hole 7 is than the large 1-2mm of the diameter of sealing screw 4.
As shown in Figure 2 and Figure 4, a plurality of briquettings 9 that turn, for L-type, are arranged in arcuate socket 5 peripheries, and its thick end is fixed on air duct cover board 6, thin side pressure is on sealing circular arc cover plate 1, and the described difference in height that turns Mian Hehou bottom, the thin bottom face of briquetting 9 is the thickness of sealing circular arc cover plate 1.On air duct cover board 6, open retaining thread hole 11, have through hole 19 can turn on briquetting 9, hold-down screw 10 is through turning the rear screw-in retaining thread of through hole 19 hole 11 on briquetting 9.
As shown in Figure 2 and Figure 5, two ends that are fixed on sealing circular arc cover plate 1 of rotating handles 12 symmetries, its length is preferably 10-15cm.
As shown in Figure 2 and Figure 6, on air duct cover board 6 tops, the arc end part of sealing circular arc cover plate 1 is fixed with the suitable end positioning metal piece 14 of arc end part of shape and sealing circular arc cover plate 1, in the circular arc side of end positioning metal piece 14 and the arc end part joint of sealing circular arc cover plate 1, is lined with rubber sheet gasket 13.End briquetting 15 is L-type, its thick side pressure is on sealing circular arc cover plate 1, Bao Duan is fixed on end positioning metal piece 14, and the thickness sum of described end positioning metal piece 14 and end briquetting 15 thin ends equates with the thickness sum of sealing circular arc cover plate 1 and end briquetting 15 thick ends.On end positioning metal piece 14 and end briquetting 15, have through hole 17, through hole 17 diameters, than the large 1-2mm of dog screw 16, have dog screw screwed hole 18 on the air duct board of correspondence position.Can turn briquetting 9 and end briquetting 10 compression modes and be auxiliary compression mode.Location, above-mentioned end and compressing structure can be realized the rotation of rotary air heater and locate outside air channel, and can shock absorbing power, are conducive to the safety of steam air heater.Therefore, one of 15 need of end briquetting, are only arranged on a side that needs fixing seal circular arc cover plate 1, but dog screw 16 needs two, and during sealing, two dog screws 16, dog screw screwed holes 18 all need to screw in one, to guarantee air duct board sealing.
What deserves to be explained is, in the through hole 7 of sealing circular arc cover plate 1 and screwed hole 8 design processes of air duct cover board 6, guarantee completely with one heart.No matter whether steam air heater is in work, as long as rotation is complete, screw in immediately the sealing that sealing screw 4 guarantees tapping, if accidentally cause bias in design and installation process, sealing screw 4 can not screw in screwed hole 8, will cause leaking out herein, the through hole 7 of sealing circular arc cover plate 1 can be tapping into major thread hole as than the large 2-3mm of the screwed hole of air duct cover board 68 diameter, install, the bolt that is selected into dimension at screwed hole place also can guarantee sealing.
Operation principle of the present invention is: while needing fixing seal, only need to turn the thin side pressure of briquetting 9 on sealing circular arc cover plate 1, sealing screw 4 is passed to the through hole 7 on U-shaped support 2 crossbeams and sealing circular arc cover plate 1, then screw in the screwed hole 8 on air duct cover board 6, tighten after sealing screw 4 and hold-down screw 10, sealing circular arc cover plate 1 will be pressed on air duct cover board 6, thereby complete near the sealing of steam inlet pipe 3 arcuate sockets 5, as shown in Figure 2, the screwed hole 8 that now not sealed circular arc cover plate 1 covers also needs to screw in sealing screw 4, to prevent that air channel from leaking out.Meanwhile, when needs rotary air heater, only need to screw out all sealing screws 4, then with hand grip rotating handles 12 as shown in Figure 2 and Figure 5, apply moment, can complete the rotary manipulation of steam air heater;
Rotary air heater is when switching rotation, in sealing circular arc cover plate 1 end and rubber sheet gasket 13 circular arcs during side contacts, steam air heater is rotated in place, then the thick side pressure of end briquetting 15 is being sealed on circular arc cover plate 1, dog screw 16 is through the rear screw-in dog screw of through hole 17 screwed hole 18 on end briquetting 15 and end positioning metal piece 14, screwed in place screw 16, can complete the compression of sealing circular arc cover plate 1 end.
Claims (4)
1. a sealing device for steam admission side during admission of Scotch boiler steam air heater single tube, is characterized in that:
On air duct cover board (6), have the arcuate socket (5) rotating for steam inlet pipe (3), the central angle that described arcuate socket (5) is corresponding is 90 °, circle hole sleeve on sealing circular arc cover plate (1) is after steam inlet pipe (3) is upper, cover on the arcuate socket (5) of air duct cover board (6), the central angle that described sealing circular arc cover plate (1) is corresponding be 180 ° and and arcuate socket (5) with one heart, a plurality of U-shaped supports (2) are fixed on sealing circular arc cover plate (1), a plurality of briquettings (9) that turn are for L-type, be arranged in arcuate socket (5) periphery, its thick end is fixed on air duct cover board (6), thin side pressure is on sealing circular arc cover plate (1), on air duct cover board (6) top, the arc end part of sealing circular arc cover plate (1) is fixed with the suitable end positioning metal piece (14) of arc end part of shape and sealing circular arc cover plate (1), end briquetting (15) is L-type, its thick side pressure is on sealing circular arc cover plate (1), Bao Duan is fixed on end positioning metal piece (14), two ends that are fixed on sealing circular arc cover plate (1) that rotating handles (12) is symmetrical.
2. the sealing device of steam admission side during Scotch boiler steam air heater single tube admission according to claim 1, is characterized in that: in the circular arc side of described end positioning metal piece (14) and the arc end part joint of sealing circular arc cover plate (1), be lined with rubber sheet gasket (13).
3. the sealing device of steam admission side during Scotch boiler steam air heater single tube admission according to claim 1 and 2, is characterized in that: the thickness that the described difference in height that turns Mian Hehou bottom, the thin bottom face of briquetting (9) is sealing circular arc cover plate (1).
4. the sealing device of steam admission side during Scotch boiler steam air heater single tube admission according to claim 1 and 2, is characterized in that: the thickness sum of described end positioning metal piece (14) and the thin end of end briquetting (15) equates with the thickness sum of sealing circular arc cover plate (1) and the thick end of end briquetting (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210240977.1A CN102777925B (en) | 2012-07-12 | 2012-07-12 | Sealing device of steam admission side of rotary boiler fan heater in steam admission by single pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210240977.1A CN102777925B (en) | 2012-07-12 | 2012-07-12 | Sealing device of steam admission side of rotary boiler fan heater in steam admission by single pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102777925A CN102777925A (en) | 2012-11-14 |
| CN102777925B true CN102777925B (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210240977.1A Expired - Fee Related CN102777925B (en) | 2012-07-12 | 2012-07-12 | Sealing device of steam admission side of rotary boiler fan heater in steam admission by single pipe |
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| Country | Link |
|---|---|
| CN (1) | CN102777925B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5286063A (en) * | 1993-01-08 | 1994-02-15 | The Babcock & Wilcox Company | Ball and socket floating seal assembly |
| CN2648191Y (en) * | 2003-09-18 | 2004-10-13 | 王松青 | Hot End Center Sealing Device of Rotary Air Preheater |
| CN201013893Y (en) * | 2007-03-20 | 2008-01-30 | 何美华 | Horizontal roller milling rolling bearing dynamic forced seal assembly |
| GB2449092A (en) * | 2007-05-10 | 2008-11-12 | Thomas Tsoi Hei Ma | Gas sealing system in a rotary heat exchanger |
| CN201496986U (en) * | 2009-07-30 | 2010-06-02 | 山东泓奥电力科技有限公司 | Energy-saving anti-clogging air heater |
| CN101825288A (en) * | 2010-04-27 | 2010-09-08 | 西安交通大学 | Sealing device for boiler rotary heater |
| CN202040831U (en) * | 2011-04-19 | 2011-11-16 | 西安交通大学 | Rotary air heater |
-
2012
- 2012-07-12 CN CN201210240977.1A patent/CN102777925B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5286063A (en) * | 1993-01-08 | 1994-02-15 | The Babcock & Wilcox Company | Ball and socket floating seal assembly |
| CN2648191Y (en) * | 2003-09-18 | 2004-10-13 | 王松青 | Hot End Center Sealing Device of Rotary Air Preheater |
| CN201013893Y (en) * | 2007-03-20 | 2008-01-30 | 何美华 | Horizontal roller milling rolling bearing dynamic forced seal assembly |
| GB2449092A (en) * | 2007-05-10 | 2008-11-12 | Thomas Tsoi Hei Ma | Gas sealing system in a rotary heat exchanger |
| CN201496986U (en) * | 2009-07-30 | 2010-06-02 | 山东泓奥电力科技有限公司 | Energy-saving anti-clogging air heater |
| CN101825288A (en) * | 2010-04-27 | 2010-09-08 | 西安交通大学 | Sealing device for boiler rotary heater |
| CN202040831U (en) * | 2011-04-19 | 2011-11-16 | 西安交通大学 | Rotary air heater |
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| Publication number | Publication date |
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| CN102777925A (en) | 2012-11-14 |
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Effective date of registration: 20201210 Address after: No.2369 Luoxing street, Shouguang City, Weifang City, Shandong Province Patentee after: Shandong yinwente energy conservation and Environmental Protection Technology Co.,Ltd. Address before: 710049 No. 28, Xianning Road, Xi'an, Shaanxi Patentee before: XI'AN JIAOTONG University |
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Granted publication date: 20141105 |