CN102777925A - 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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- CN102777925A CN102777925A CN2012102409771A CN201210240977A CN102777925A CN 102777925 A CN102777925 A CN 102777925A CN 2012102409771 A CN2012102409771 A CN 2012102409771A CN 201210240977 A CN201210240977 A CN 201210240977A CN 102777925 A CN102777925 A CN 102777925A
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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 when being specifically related to a kind of Scotch boiler steam air heater single tube admission.
Background technology
The boiler steam air heater is a kind of heat transmission equipment that utilizes the extracted steam from turbine preheating to get into 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 wind steam air heater; Its structure and principle are basic identical, act as to improve the air preheater cold junction temperature, prevent generation cold end corrosion of air preheater cold junction heating surface and clogging phenomenon.The Scotch boiler steam air heater reduces the pressure fan power consumption owing to can effectively reduce the stop transport duct resistance of phase of steam air heater, helps to improve the economic security property of power plant, and has and transform advantage such as simple and obtained extensive use.The arrangement of common steam air heater has vertical, horizontal and the side formula, with regard to its performance, does not have significant difference, generally selects flexibly according to physical condition.The steam air heater that the 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 be opened on the cover plate of air channel and supply steam inlet pipe completion throwing to stop switching the arcuate socket of rotation, if arcuate socket can not get good sealing, leaking out in the air channel that possibly cause will be extremely unfavorable to the safety and economic operation of unit.While, rotary steam air heater was arranged in the air channel, when switching rotation, was difficult for confirming its particular location, made that fixing of rotary steam air heater is quite inconvenient.
Chinese patent CN101825288A; Name is called " a kind of sealing device of boiler rotary air heater "; Be that half degree of lip-rounding structure is welded on the plate of air channel; Through bolt the annulus cover plate is pressed on the plate of air channel, such design is applicable to the rotary steam air heater of the vertical layout of two-tube admission, and will mainly there be following problem in the rotary steam air heater that is applied to the side formula layout of single tube admission:
1) rotating hole of steam admission side quadrant arc only during the admission of Scotch boiler steam air heater single tube adopts the circular ring structure sealing to cause certain waste of material, and when switching rotation because the contact area conference increases frictional resistance;
2) half degree of lip-rounding structure can not be welded too much, otherwise influences rotary steam air heater the moving of steam supply pipe in rotary course, and promptly half degree of lip-rounding structure can not be welded in the top of plate arcuate socket in the air channel, and this has just influenced and has compressed effect;
3) rotary actuator of common Scotch boiler steam air heater is generally worm mechanism, and this structure need not frequent use, and cost is higher, and the rotating shaft place of drawing need seal, and leaks out to prevent the air channel;
Be difficult for when 4) switching rotation externally realizing the location, positioned internal possibly cause greater impact power, is unfavorable for the safety of steam air heater.
Summary of the invention
For solving the problem that exists in the above-mentioned prior art, the sealing device of steam admission side has safe and reliable easy to operate when the object of the present invention is to provide a kind of Scotch boiler steam air heater single tube admission; Simple in structure; Use the material saving, the little characteristics that take up room can play good sealing effectiveness and realize on effective rotary manipulation basis; Reduce installation cost, had the excellent popularization using value.
For achieving the above object, the technical scheme that the present invention adopted is:
The sealing device of steam admission side during a kind of Scotch boiler steam air heater single tube admission has on air channel cover plate 6 and is used for the arcuate socket 5 that steam inlet pipe 3 rotates, and said arcuate socket 5 corresponding central angles are 90 °; Circle hole sleeve on the sealing circular arc cover plate 1 covers on the arcuate socket 5 of air channel cover plate 6 after on the steam inlet pipe 3, and said sealing circular arc cover plate 1 corresponding central angle is 180 ° and concentric with arcuate socket 5; A plurality of U-shaped supports 2 are fixed on the sealing circular arc cover plate 1; A plurality of briquettings 9 that change are the L type, are arranged in arcuate socket 5 peripheries, and its thick end is fixed on the air channel cover plate 6; Bao Duan is pressed on the sealing circular arc cover plate 1; The arc end part of cover plate 6 tops, sealing circular arc cover plate 1 is fixed with suitable location, the end metal derby 14 of arc end part of shape and sealing circular arc cover plate 1 in the air channel, and end briquetting 15 is the L type, and its thick end is pressed on the sealing circular arc cover plate 1; Bao Duan is fixed on the metal derby 14 of location, end, two ends that are fixed on sealing circular arc cover plate 1 of rotating handles 12 symmetries.
The arc end part joint of the circular arc side of metal derby 14 and sealing circular arc cover plate 1 is lined with rubber sheet gasket 13 in location, said end.
The difference in height of said thin bottom face that changes briquetting 9 and thick bottom face is the thickness of sealing circular arc cover plate 1.
The thickness sum of location, said end metal derby 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 on air channel cover plate 6 and supplies steam inlet pipe 3 completion throwings to stop switching the arcuate socket 5 of rotation; Arcuate socket 5 corresponding central angles are 90 °; And sealing circular arc cover plate 1 corresponding central angle is 180 °, and therefore at steam air heater during no matter at any state, sealing circular arc cover plate 1 covers all the time on the arcuate socket on the air channel cover plate 65; Circular hole 5 has all obtained good sealing, needn't need annulus.Can change briquetting 9 and be arranged in the arcuate socket periphery; Mainly be near improving arcuate socket, to leak out serious relatively and the less situation of pressure point; Can change the thin bottom face of briquetting and the difference in height of thick bottom face is the thickness of sealing circular arc cover plate 1, and this can be avoided the bending of screw unbalance stress and make the bad problem that can't screw of screw-threaded engagement.Hold-down screw is thrown at the Scotch boiler steam air heater and need not in the stoppage in transit handoff procedure to screw out.Location, two ends metal derby 14 is separately fixed at corresponding rotation formula steam air heater and throws sealing position, circular arc cover plate 1 end when stopping transport; Played the outside effect that realizes the rotary air heater location in the air channel, rubber sheet gasket 13 has played the effect of location, buffering end metal derby 14 and sealing circular arc cover plate 1 end collision impact power.End briquetting 15 plays the effect that compresses sealing circular arc patch ends with dog screw; Press 9 tight principles similar with changeing briquetting, the thickness sum of location, end metal derby 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, practices thrift with material; It is little to take up room; Playing good sealing effectiveness and realizing having reduced installation cost on effective rotary manipulation basis, has the excellent popularization using value.
Compare with prior art, advantage of the present invention is following:
1) steam admission side adopts sealing circular arc cover plate 1 to save raw material to a great extent during the admission of Scotch boiler steam air heater single tube, and can reduce the frictional resistance when switching rotation;
2) can be as the case may be at arcuate socket 5 peripheries, increase can be changeed the number of briquetting 9, guarantees to seal the effect that compresses of 6 of circular arc cover plate 1 and air channel cover plates; Near the steam inlet tube, adopt and contain the hold down gag that can change briquetting; Adopt the hold down gag of location, end metal derby 14 and end briquetting 15 in sealing circular arc cover plate 1 end.Sealing adopts three kinds to compress mode and guaranteed sealing effectiveness, promptly U-shaped support 2, can change 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, need not to adopt 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 that damages is changed easily.
Description of drawings
Fig. 1 is rotary steam air heater rotational structure and steam inlet pipe arrangement sketch map.
Fig. 2 is the sketch map after rotary steam air heater is installed into the steam pipe sealing device.
Fig. 3 is the A-A partial sectional view.
Fig. 4 is the B-B partial sectional view.
Fig. 5 is the C-C partial sectional view.
Fig. 6 is the D-D partial sectional view.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further explain.
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 steam air heater is non-to distribute along axis; On air channel cover plate 6, have and be used for the arcuate socket 5 that steam inlet pipe 3 rotates; Said arcuate socket 5 corresponding central angles are 90 °, and the circle hole sleeve on the sealing circular arc cover plate 1 covers on the arcuate socket 5 of air channel cover plate 6 after on the steam inlet pipe 3; Said sealing circular arc cover plate 1 corresponding central angle is 180 ° and concentric with arcuate socket 5; Width is looked the comparable arcuate socket 5 wide 60-100mm of erecting bed situation, and a plurality of U-shaped supports 2 are welded on the sealing circular arc cover plate 1, and the welding position is about sealing circular arc cover plate 1 center line symmetry; Crossbeam through U-shaped support 2 will seal circular arc cover plate 1 and compress with air channel cover plate 6; Radially evenly compress and help arcuate socket sealing, U-shaped support 2 rotates with sealing circular arc cover plate 1, does not hinder the switching rotation of steam air heater; Avoided owing to bolt compress compress near the bolt hole that possibly cause seal the 1 edge perk of circular arc cover plate cause leak out etc. problem, it is the mode that mainly compresses of the present invention that this kind compresses mode.
As shown in Figure 3, cover plate 6 is opened screwed hole 8 in the air channel, opens hole 7 at U-shaped support 2 with sealing on the circular arc cover plate 1, and sealing screw 4 inserts through holes 7 backs and screwed hole 8 is tightened, and the diameter of through hole 7 is than the big 1-2mm of diameter of sealing screw 4.
Like Fig. 2 and shown in Figure 4; A plurality of briquettings 9 that change are the L type, are arranged in arcuate socket 5 peripheries, and its thick end is fixed on the air channel cover plate 6; Bao Duan is pressed on the sealing circular arc cover plate 1, and the difference in height of said thin bottom face that changes briquetting 9 and thick bottom face is the thickness of sealing circular arc cover plate 1.On air channel cover plate 6, open retaining thread hole 11, have through hole 19 on the briquetting 9 can changeing, hold-down screw 10 passes through hole 19 backs that can change on the briquetting 9 and screws in retaining thread holes 11.
Like Fig. 2 and shown in 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.
Like Fig. 2 and shown in Figure 6; The arc end part of cover plate 6 tops, sealing circular arc cover plate 1 is fixed with suitable location, the end metal derby 14 of arc end part of shape and sealing circular arc cover plate 1 in the air channel, and the circular arc side of metal derby 14 is lined with rubber sheet gasket 13 with the arc end part joint of sealing circular arc cover plate 1 in the location, end.End briquetting 15 is the L type; Its thick end is pressed on the sealing circular arc cover plate 1; Bao Duan is fixed on the metal derby 14 of location, end, and the thickness sum of location, said end metal derby 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 location, end metal derby 14 and end briquetting 15, have through hole 17, through hole 17 diameters have dog screw screwed hole 18 than dog screw 16 big 1-2mm on the plate of the air channel of correspondence position.Can change briquetting 9 compresses mode with end briquetting 10 and is the auxiliary mode that compresses.Location, above-mentioned end and compressing structure can be realized the positioning of rotating of rotary steam air heater outside the air channel, and can shock absorbing power, help the safety of steam air heater.Therefore, one of 15 need of end briquetting, only being installed in needs a side of fixing seal circular arc cover plate 1 to get final product, but dog screw 16 needs two, and two dog screws 16, dog screw screwed holes 18 all need screw in one during sealing, to guarantee air channel plate sealing.
What be worth explanation is to guarantee fully with one heart in the through hole 7 of sealing circular arc cover plate 1 and screwed hole 8 design processes of air channel cover plate 6.No matter steam air heater as long as rotation finish, immediately screws in sealing that sealing screw 4 guarantee tapping whether in work; If cause off-centre accidentally in the design and installation process; Sealing screw 4 can not screw in screwed hole 8, will cause leaking out here, can the through hole 7 of sealing circular arc cover plate 1 be tapping into the major thread hole like the big 2-3mm of screwed hole 8 diameters than air channel cover plate 6; Install, the bolt that is selected into corresponding specification at the screwed hole place also can guarantee sealing.
Operation principle of the present invention is: when needing fixing seal; Only need to change briquetting 9 thin side pressures on sealing circular arc cover plate 1, sealing screw 4 is passed the through hole 7 on U-shaped support 2 crossbeams and the sealing circular arc cover plate 1, screw in the screwed hole 8 on the air channel cover plate 6 then; After tightening sealing screw 4 and hold-down screw 10; Sealing circular arc cover plate 1 will be pressed on the air channel cover plate 6, thereby accomplish near the sealing of steam inlet pipe 3 arcuate sockets 5, and will be as shown in Figure 2; Need do not screwed in sealing screw 4 by the screwed hole 8 that sealing circular arc cover plate 1 covers this moment yet, leaks out to prevent the air channel.Simultaneously, when the needs rotary air heater, only need to screw out all sealing screws 4, use hand grip such as Fig. 2 and rotating handles 12 applied moments shown in Figure 5 then, can accomplish the rotary manipulation of steam air heater;
Rotary air heater is when switching rotation; When in sealing circular arc cover plate 1 end and rubber sheet gasket 13 circular arcs during side contacts; Then the steam air heater rotation puts in place, then briquetting 15 thick side pressures in end is being sealed on the circular arc cover plate 1, and dog screw 16 passes and screws in dog screw screwed hole 18 after end briquetting 15 is located the through hole 17 on the metal derby 14 with the end; Screwed in place screw 16 can be accomplished compressing of sealing circular arc cover plate 1 end.
Claims (4)
1. the sealing device of steam admission side during a Scotch boiler steam air heater single tube admission is characterized in that:
On air channel cover plate (6), have and be used for the arcuate socket (5) that steam inlet pipe (3) rotates; The central angle that said arcuate socket (5) is corresponding is 90 °; Circle hole sleeve in sealing circular arc cover plate (1) covers on the arcuate socket (5) of air channel cover plate (6) after steam inlet pipe (3) is gone up, the central angle that said sealing circular arc cover plate (1) is corresponding be 180 ° and with arcuate socket (5) with one heart; A plurality of U-shaped supports (2) are fixed on the sealing circular arc cover plate (1); A plurality of briquettings (9) that change are the L type, are arranged in arcuate socket (5) periphery, and its thick end is fixed on the air channel cover plate (6); Bao Duan is pressed on the sealing circular arc cover plate (1); The arc end part of the cover plate in the air channel (6) top, sealing circular arc cover plate (1) is fixed with shape and suitable location, the end metal derby (14) of the arc end part of sealing circular arc cover plate (1), and end briquetting (15) is the L type, and its thick end is pressed on the sealing circular arc cover plate (1); Bao Duan is fixed on the end location metal derby (14), two ends that are fixed on sealing circular arc cover plate (1) of rotating handles (12) symmetry.
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: be lined with rubber sheet gasket (13) in the circular arc side of said end location metal derby (14) and the arc end part joint of sealing circular arc cover plate (1).
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 difference in height of said thin bottom face that changes briquetting (9) and thick bottom face is the thickness of 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 location, said end metal derby (14) and the thin end of end briquetting (15) equates with the thickness sum that seals 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 true CN102777925A (en) | 2012-11-14 |
| CN102777925B CN102777925B (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210240977.1A Active 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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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 | Thermal end central sealing device for 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 active Active
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 | Thermal end central sealing device for 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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| CN102777925B (en) | 2014-11-05 |
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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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