CN2222297Y - Three-way corrugated expansion joint for coal powder pipeline - Google Patents
Three-way corrugated expansion joint for coal powder pipeline Download PDFInfo
- Publication number
- CN2222297Y CN2222297Y CN 95239650 CN95239650U CN2222297Y CN 2222297 Y CN2222297 Y CN 2222297Y CN 95239650 CN95239650 CN 95239650 CN 95239650 U CN95239650 U CN 95239650U CN 2222297 Y CN2222297 Y CN 2222297Y
- Authority
- CN
- China
- Prior art keywords
- expansion joint
- diameter end
- honeycomb duct
- corrugated expansion
- novel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003245 coal Substances 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 title abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 230000007704 transition Effects 0.000 claims abstract description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 14
- 239000010439 graphite Substances 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 3
- 239000011253 protective coating Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000002817 coal dust Substances 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The utility model relates to a novel three-dimensional ripple expansion joint of pulverized coal pipeline comprises honeycomb duct, bellows, insulating layer, sealing member essential element. The end part of the small-diameter end of the draft tube is in a ring shape, the sealing element is a flexible graphite ring with a framework, the joint of the outer circle of the graphite ring and the inner wall of the large-diameter end of the draft tube is in transition fit, and an annular gap cavity is arranged between the inner circle of the graphite ring and the outer side of the small-diameter end of the draft tube. The utility model is used for among the buggy pipeline system of the large-scale boiler of trades such as electric power, metallurgy, petrochemical industry, the leakproofness is good, and the compensation is effectual, long service life. The service life of the expansion joint is 2-3 times of that of the conventional coal powder pipeline expansion joint.
Description
The utility model relates to a kind of novel three-dimensional corrugated expansion joint that is used for power transportation pipe, belongs to the line device technical field.
The large-sized boiler of industries such as electric power, metallurgy, petrochemical industry need spray into the coal dust more than 300 ℃ usually when moving, to improve the thermal efficiency.Coal dust sprays into boiler through conveyance conduit by burner.Because a variety of causes such as deadweight, vibration and thermal distortions, the normal three direction displacement that produces between each part generally adopts bellows expansion joint to compensate in the system.For preventing that the high temperature coal dust to the washing away of bellows, causing wave duct to wear and tear too early, the sealing at expansion joint active section position has just become technical key issue.At present, the corrugated expansion joint that is used for pulverized coal channel adopts wire netting or combined sleeve structure to stop the erosion of coal dust to bellows usually.Though this structure compensation performance is fair, the wire netting easy burn-out can not bear coal dust and wash away, and wear resistance is bad; Tube-in-tube structure must have enough gaps, poor sealing for satisfying angular displacement.More than two kinds of structures all can not effectively stop the erosion of coal dust to bellows, often cause accumulated powder, produce spontaneous combustion, bellows lost efficacy in advance and damage, bring the serious consequence of leakage of pulverized coal, befouling environment.
The purpose of this utility model is to overcome deficiency of the prior art, provides that a kind of structure is new, good airproof performance, compensation effect be good, the novel three-dimensional corrugated expansion joint of the pulverized coal channel of long service life.
The technical solution of the utility model is: in the novel three-dimensional corrugated expansion joint of pulverized coal channel that is made of honeycomb duct, bellows, Sealing, refractory fiber thermal-protective coating critical piece, the miner diameter end end of honeycomb duct is the garden ring-type, so that coal dust is mobile unimpeded, reduce accumulated powder.The Expanded graphite ring that is sealed into the band skeleton of expansion joint, the junction point of outer garden of graphite annulus and honeycomb duct bigger diameter end inwall is a transition fit, between garden and the honeycomb duct miner diameter end outside ring gap is arranged in the graphite annulus.Graphite can be high temperature resistant, and self lubricity is arranged, and wear resistance is good, and having skeleton has increased intensity again, thereby has improved the sealability of expansion joint, prolongs its working life.Ring gap in the sealing configuration then guarantees the compensation performance of expansion joint when pipe-line system produces lateral displacement and angular displacement effectively.
The skeleton of graphite annulus is a sheet metal spare in the utility model, and its thermal expansion coefficient is preferably consistent with conduit.The graphite annulus of band skeleton can be for single, also can be for a plurality of.A plurality of graphite annuluss more help the compensation of angular displacement.
Since adopt the new structure of graphite-seal ring, good airproof performance of the present utility model, and compensation effect is good, long service life.Be generally 2～3 times that have the pulverized coal channel expansion joint now working life.
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the partial schematic diagram of seal ring assembling place among Fig. 1.
Present embodiment is made up of honeycomb duct (1), bellows (2), refractory fiber thermal-protective coating (3), Sealing (4).The miner diameter end end (5) of honeycomb duct (1) is the garden ring-type.Sealing (4) is the graphite annulus of band skeleton (7), and the junction point (6) of outer garden of graphite annulus and honeycomb duct bigger diameter end inwall is a transition fit, between garden and the honeycomb duct miner diameter end outside ring gap (8) is arranged in the graphite annulus.The material of skeleton (7) is a carbon steel, slabbing.Graphite annulus has two.
Claims (3)
1, the novel three-dimensional corrugated expansion joint of a kind of pulverized coal channel, constitute by honeycomb duct (1), bellows (2), refractory fiber thermal-protective coating (3), Sealing (4) critical piece, the miner diameter end end (5) that it is characterized in that honeycomb duct (1) is the garden ring-type, Sealing (4) is the Expanded graphite ring of band skeleton (7), the junction point (6) of outer garden of graphite annulus and honeycomb duct bigger diameter end inwall is a transition fit, between garden and the honeycomb duct miner diameter end outside ring gap (8) is arranged in the graphite annulus.
2, by the novel three-dimensional corrugated expansion joint of the described pulverized coal channel of claim 1, the skeleton (7) that it is characterized in that graphite annulus is a sheet metal spare.
3, by the novel three-dimensional corrugated expansion joint of the described pulverized coal channel of claim 1, it is characterized in that graphite annulus can be for single, also can be for a plurality of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95239650 CN2222297Y (en) | 1995-04-22 | 1995-04-22 | Three-way corrugated expansion joint for coal powder pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95239650 CN2222297Y (en) | 1995-04-22 | 1995-04-22 | Three-way corrugated expansion joint for coal powder pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2222297Y true CN2222297Y (en) | 1996-03-13 |
Family
ID=33881390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95239650 Expired - Fee Related CN2222297Y (en) | 1995-04-22 | 1995-04-22 | Three-way corrugated expansion joint for coal powder pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2222297Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221202A (en) * | 2011-04-01 | 2011-10-19 | 张全胜 | Stainless steel three-dimensional expansion joint used for sealing high temperature ash and slag |
-
1995
- 1995-04-22 CN CN 95239650 patent/CN2222297Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221202A (en) * | 2011-04-01 | 2011-10-19 | 张全胜 | Stainless steel three-dimensional expansion joint used for sealing high temperature ash and slag |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |