CN202203982U - Depressing-type flexible sealing device - Google Patents
Depressing-type flexible sealing device Download PDFInfo
- Publication number
- CN202203982U CN202203982U CN2011202814684U CN201120281468U CN202203982U CN 202203982 U CN202203982 U CN 202203982U CN 2011202814684 U CN2011202814684 U CN 2011202814684U CN 201120281468 U CN201120281468 U CN 201120281468U CN 202203982 U CN202203982 U CN 202203982U
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- Prior art keywords
- plate
- brush
- depressing
- decompression
- flexible
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- Expired - Lifetime
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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
In the depressing-type flexible sealing device provided in the utility model, based on the prior sealing device of a flexible brush and a connection board, a depressing plate is additionally provided, the depressing plate is arranged at the back side of the flexible brush and is inclined backward at a proper angle, the cavity formed between the depressing plate and the flexible brush automatically forms a depressing cavity, the differential pressure at the front and back of the flexible brush is largely minimized, thereby the brush is hard to deform, the sealing property is better, long-term operation of an air preheater is adapted, and energy-saving and operation cost-saving effects are enhanced. Through the depressing effect of the depressing plate, a medium (which should be sealed) leakage is effectively prevented, and a peripheral medium can be prevented from entering the sealed cavity. The leakage amount is only 10% to 20% of the leakage amount in a common sealing condition. The brush is weldingly connected with the connection board, an elastic plate, a reinforcing plate and other components employ a bolt fastening structure, and the depressing-type flexible sealing device is advantageous in that the metal wire is hard to shed, the structure is simple, the comprehensive cost is low, the installation is convenient, and the sealing effect is good.
Description
Technical field
The utility model relates to a kind of sealing device, and the movable sealing that is particularly suitable for large-scale rotary machine equipment such as power plant's rotary regenerative air preheater is used, and belongs to the air preheater sealing device.
Background technology
Present domestic rotary regenerative air preheater inner sealing is the lamellar seal structure, and it mainly is divided into radially, axial and bypass seal.Air preheater divides air side and fume side, and pressure reduction is bigger between the two, and there is the certain designed gap in its diaphragm seal in addition, so the unavoidable air that causes leaks to fume side.Normal air leak rate of air curtain because the brush body flexural deformation that the air preheater long-time running causes often becomes mushroom deformation, causes air leak rate of air curtain further to strengthen again up to 7% ~ 9%, reaches 15% ~ 20%.
Leaking out of air preheater can cause the variation of unit heating power operating mode, and along with the increase of inleakage, hot blast temperature descends, and exhaust gas temperature also descends, and exhaust gas temperature descends and causes cold junction heating surface wall temperature to reduce again, has quickened the process of cold end corrosion; Leak out and also influence the economic benefit of unit operation, it has reduced the thermal efficiency of unit on the one hand, has increased the power consumption of air inducing machinery on the other hand, and enterprise's gross coal consumption rate and net coal consumption rate are increased.
The air preheater increase of leaking out causes a blast to reduce, and in order to prevent an airduct plugging, have to increase the primary air fan baffle opening, has increased exerting oneself of primary air fan and pressure fan.Wind and secondary wind drain in the flue gas in large quantities, have increased exerting oneself of air-introduced machine.Not only cause the power plant station service to rise, but also when causing the unit oepration at full load air-introduced machine to regulate surplus not enough, the restriction operations staff adjustment of burning influences unit output.Stove internal combustion requisite oxygen can't get into simultaneously, influences the safe operation of unit.Owing to leak out, flue-gas temperature reduces, and the air preheater heated surface corrosion is more serious with obstruction, and boiler thermal output reduces, and these all will influence the safety and economic operation of unit.In addition for coal-fired unit in some cases since exhaust smoke level increases or coal pulverizer in the dry wind quantity not sufficient, also can cause the decline of exerting oneself of whole unit.So the problem of leaking out of air preheater has a strong impact on the economical operation of power plant, sometimes even threaten the safe operation of boiler.
Summary of the invention
The purpose of the utility model is in order to overcome the mushroom deformation that above-mentioned existing air preheater causes easily and make the serious problem of leaking out; Design a kind of simple and reasonable; Have additional decompression chamber and make brush body not yielding; Sealing property is better, can adapt to the air preheater long-play, helps energy-conservation and decompression type flexible seal device that cut operating costs
The decompression type flexible seal device of the utility model; Mainly be on the basis of the existing sealing device of Flexible brush and connecting plate; Have additional the decompression plate, said decompression plate is installed in the Flexible brush rear side and the suitable angle that recedes, and the cavity between decompression plate and the Flexible brush is a decompression chamber.
The sweptback angle of said decompression plate is 10～30 °.The sweptback best angle of said decompression plate is 25 °.
Said Flexible brush comprises brush body, preceding elastic plate, front pressuring plate, back elastic plate, rear fender; Said brush body adopts the arrangement of refractory metal silk and the rear end is welded; The brush body rear end is welded on the front end of connecting plate again, and preceding elastic plate is fitted on the brush body front side edge, and front pressuring plate is fitted on the preceding elastic plate; Back elastic plate is fitted on the brush body back side edge, and rear fender is fitted on the elastic plate of back.
For flexibility and the rigidity that improves elastic plate, said before elastic plate and with the back elastic plate form by 1～3 stainless steel book plate respectively.
The decompression type flexible seal device of the utility model is owing on the existing sealing device basis of Flexible brush and connecting plate, have additional the decompression plate; This decompression plate is installed in the Flexible brush rear side and the suitable angle that recedes, and making has a suitable cavity between decompression plate and the Flexible brush, during work; When the rotating cylinder of rotary regenerative air preheater rotates forward, though the pressure of this cavity is less than the pressure in Flexible brush the place ahead but greater than the pressure at decompression plate rear, form decompression chamber automatically; The front and back pressure reduction of Flexible brush is greatly reduced, thereby can make brush body not yielding, sealing property is better; Can adapt to the air preheater long-play, help energy-conservation with cut operating costs.And the depressurization through the decompression plate can effectively stop leaking outside of medium (medium that must seal), can prevent that again peripheral medium from entering in the sealed chamber.Its leakage rate is merely 10% ~ 20% of conventional seals.Brush body and connecting plate are through being welded to connect, and elastic plate and stiffener etc. adopt bolt fastening structure, also have wire difficult drop-off on the brush body, simple in structure, integrated cost is low, easy for installation, advantage of good sealing effect.
Description of drawings
Fig. 1 is a kind of structural representation of the utility model;
Fig. 2 is the mounting structure sketch map of the utility model.
Among Fig. 11 is brush body, the 2nd, and preceding elastic plate 1,3rd, preceding elastic plate 2,4th, front pressuring plate, the 5th, back elastic plate 1,6th, back elastic plate 2,7th, rear fender, the 8th, decompression plate, the 9th, decompression chamber, the 10th, brush body rear end, the 11st, bolt, the 12nd, connecting plate.Among Fig. 2 13 is beams of the rotating cylinder of rotary regenerative air preheater, the 14th, and bolt, other is identical with Fig. 1.
The specific embodiment
Accompanying drawing is non-limiting to disclose specific embodiment of the present invention, further describes as follows in conjunction with accompanying drawing.
Referring to accompanying drawing 1; The decompression type flexible seal device of the utility model; Mainly be on the basis of existing Flexible brush 1 and connecting plate 12; Have additional decompression plate 8, said decompression plate 8 is installed in Flexible brush 1 rear side and the suitable angle beta that recedes, and the decompression chamber that the cavity between decompression plate 8 and the Flexible brush 1 forms is 9.
Said decompression plate 8 sweptback angle betas are elected 10～30 ° as, and best angle β is 25 °.
Said Flexible brush can be selected existing common Flexible brush or flexible and the more moderate high-quality Flexible brush of rigidity for use; Also can select the Flexible brush of following structure for use; This Flexible brush comprises brush body 1, preceding elastic plate 2 and 3, front pressuring plate 4, back elastic plate 5 and 6, rear fender 7, and said brush body 1 adopts the arrangement of refractory metal silk and rear end 10 is welded, and the rear end 10 of the brush body 1 after the welding is welded on the front end of connecting plate 12 again; Preceding elastic plate 2 and 3 is fitted on brush body 1 front side edge; On the elastic plate 3, back elastic plate 5 and 6 was fitted on brush body 1 back side edge before front pressuring plate 4 was fitted in, and rear fender 7 is fitted on the elastic plate 6 of back.Be packed in successively on the connecting plate 12 by Fig. 1 order with bolt 11 again.Said connecting plate 12 rear portions are provided with the construction bolt hole, can be installed on the beam 13 of rotating cylinder of rotary regenerative air preheater through bolt 14, and its structure is as shown in Figure 2.
Claims (5)
1. a decompression type flexible seal device comprises Flexible brush and connecting plate, it is characterized in that having additional the decompression plate, and said decompression plate is installed in the Flexible brush rear side and the suitable angle that recedes, and the cavity between decompression plate and the Flexible brush is a decompression chamber.
2. decompression type flexible seal device as claimed in claim 1 is characterized in that the sweptback angle of said decompression plate is 10～30 °.
3. decompression type flexible seal device as claimed in claim 1 is characterized in that the sweptback best angle of said decompression plate is 25 °.
4. like claim 1 or 2 or 3 described decompression type flexible seal devices; It is characterized in that said Flexible brush comprises brush body, preceding elastic plate, front pressuring plate, back elastic plate, rear fender, said brush body adopts the arrangement of refractory metal silk and the rear end is welded, and the brush body rear end is welded on the front end of connecting plate again; Preceding elastic plate is fitted on the brush body front side edge; On the elastic plate, back elastic plate was fitted on the brush body back side edge before front pressuring plate was fitted in, and rear fender is fitted on the elastic plate of back.
5. decompression type flexible seal device as claimed in claim 4, it is characterized in that said before elastic plate and with the back elastic plate form by 1～3 stainless steel book plate respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202814684U CN202203982U (en) | 2011-08-04 | 2011-08-04 | Depressing-type flexible sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202814684U CN202203982U (en) | 2011-08-04 | 2011-08-04 | Depressing-type flexible sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202203982U true CN202203982U (en) | 2012-04-25 |
Family
ID=45968103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202814684U Expired - Lifetime CN202203982U (en) | 2011-08-04 | 2011-08-04 | Depressing-type flexible sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202203982U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791492A (en) * | 2015-05-07 | 2015-07-22 | 四川东能节能技术有限公司 | Air preheater and cold-end radial or axial sealing device of same |
-
2011
- 2011-08-04 CN CN2011202814684U patent/CN202203982U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791492A (en) * | 2015-05-07 | 2015-07-22 | 四川东能节能技术有限公司 | Air preheater and cold-end radial or axial sealing device of same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120425 |
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| CX01 | Expiry of patent term |