CN2127973Y - Sleeve expansion joint - Google Patents
Sleeve expansion joint Download PDFInfo
- Publication number
- CN2127973Y CN2127973Y CN 92211412 CN92211412U CN2127973Y CN 2127973 Y CN2127973 Y CN 2127973Y CN 92211412 CN92211412 CN 92211412 CN 92211412 U CN92211412 U CN 92211412U CN 2127973 Y CN2127973 Y CN 2127973Y
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- CN
- China
- Prior art keywords
- expansion joint
- stove
- improvement
- sleeve pipe
- expansion
- 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
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Abstract
The utility model relates to the improvement of an expansion joint, particularly the improvement of the expansion joint for the indirect heating stove of a hot medium in pipeline conveying for raw oil. A casing tube 8 is sheathed outside a casing tube 3. A hot temperature resistant soft filler 9 is arranged in a gap between the two casing tubes through a press cover 4 and a back baffle head 10. The casing tubes 3, 8 are respectively connected with the flange plates 2, 12 of an inlet and an outlet into an integral body. The expansion joint has the advantages of good sealing performance, corrosion resistance, and long service life. Heat expansion and cold contraction resulting from starting and stopping the stove and expansion blast resulting from second combustion when oil is accumulated in the stove can be protected by the utility model. The problem of corrosion resulting from the deposition of low temperature sulfide is solved. The improvement of an expansion joint has the advantages of low cost, easy manufacture, and enhancement of stove efficiency and security.
Description
The utility model is the improvement to existing expansion joint, the heating agent indirect heater improvement of expansion joint in especially crude oil pipeline being carried.
At present, Xian Jin imitative American heating agent indirect heater is generally applied in the crude oil pipeline transporting system.Though it has safety and steady, advantage that automaticity is high, heating agent heat exchanger exit wherein and air heat exchanger outlet expansion joint are because the flue gas low-temperature sulfur-bearing separates deposition but in use,, the corrosion of acid dirt, with regard to corrosion failure, cause heat exchanger to leak gas everywhere, the flue gas short circuit in short time, the expansion joint bottom leaks, reduce thereby stove is imitated, the acid dirt flows out befouling environment.The effect of expansion joint is when long-pending oil is arranged in stove, and the expansion that secondary combustion is caused is blown out and the start and stop stove causes expands with heat and contract with cold and shield.Aforementioned expansion joint reason for corrosion is, the used primary material of the indirect stove of heating agent is a crude oil, sulphur content is higher, produce sulfur dioxide in the burning crude oil process, owing to there is oxygen to exist in the flue gas, sulfur dioxide further is oxidized to sulfur trioxide again, and when temperature was lower than 400 ℃, the water vapor in sulfur trioxide and the flue gas was combined to sulfuric acid.When tube wall temperature was lower than the temperature (dew point) that sulfuric acid vapor condenses into dilute sulfuric acid, sulfuric acid vapor just produced cold end corrosion on tube wall.And the expansion joint material on the imitative American heating agent indirect heater is thin stainless steel; in order when expanding with heat and contract with cold, to play a protective role; expansion joint is made bellow type, and the part in the sulfur acid sediments in the flue gas is very easily amassed in the bellows lower edge, thereby causes rapid corrosion.And this expansion joint is dependence on import still at present, and expense is higher.
The purpose of this utility model provides a kind of improved heating agent indirect heater expansion joint, to alleviate sulfur acid sediments in the flue gas to the corrosion of expansion joint tube wall, prolongs its working life, improves stove and imitates, and reduces cost.
The utility model is to realize like this, it is is mainly imported and exported two sleeve pipes by air-flow and forms, the air outlet casing pipe sleeve overlaps the tube outside at suction port, the heat-resisting soft filler is contained in the crack between two sleeve pipes by the backstop head on gland and the suction port sleeve pipe, two sleeve pipes respectively with import and export flange plate and fuse.
Adopt the expansion joint of said structure, when the start and stop stove expanded with heat and contract with cold, two sleeve pipes can produce relative displacement, and oven parts and integral body are played a protective role.In addition, it also has the following advantages.
1, withdraws from gland after filling it up with soft packing, can play complementary explosion-proof, improved Security.
2, smooth in the expansion joint, be difficult for deposition sulphide, compare with the bellow type expansion joint, can significantly reduce wall erosion, improve working life.
3, cost is low, makes easily.
Provide concrete structure of the present utility model below in conjunction with drawings and Examples.
As shown in drawings, on the expansion joint of the utility model, suction port sleeve pipe 3, air outlet sleeve pipe 8 fuse with flange plate 2 and flange plate 12 respectively, sleeve pipe 8 is enclosed within sleeve pipe 3 outsides, heat-resisting soft filler 9 is by in 10 crack that are contained between two sleeve pipes of the backstop on gland 7 and the sleeve pipe 3, gland 7 connects together by the projection 5 on bolt 4 and nut 6 and the sleeve pipe 8, and Xiao hole 1,11 is arranged respectively on the flange plate 2,12.
The used sleeve pipe of the utility model is made by metallic material such as carbon steel or manganese steel, and the heat-resisting soft filler is lead powder asbestos packing and ceramic fiber blanket.
Claims (2)
1, bushing type expansion joint, sleeve pipe 8 is enclosed within sleeve pipe 3 outsides, sleeve pipe 3,8 fuses with flange plate 2,12 respectively, Xiao hole 1 and Xiao hole 11 are arranged respectively on the flange plate 2,12, it is characterized in that, on described expansion joint, heat-resisting soft filler 9 is by in 10 crack that are contained between two sleeve pipes of the backstop on gland 7 and the sleeve pipe 3, and gland 7 connects together by the projection 5 on bolt 4 and nut 6 and the sleeve pipe 8.
2, a kind of bushing type expansion joint as claimed in claim 1 is characterized in that, described heat-resisting soft filler 9 is lead powder asbestos packing and ceramic fiber blanket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92211412 CN2127973Y (en) | 1992-03-21 | 1992-03-21 | Sleeve expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92211412 CN2127973Y (en) | 1992-03-21 | 1992-03-21 | Sleeve expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2127973Y true CN2127973Y (en) | 1993-03-10 |
Family
ID=33763154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92211412 Expired - Fee Related CN2127973Y (en) | 1992-03-21 | 1992-03-21 | Sleeve expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2127973Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705612A (en) * | 2012-05-30 | 2012-10-03 | 辽宁工程技术大学 | Telescopic joint device for deep well ice conveying pipelines |
| CN103133801A (en) * | 2011-11-23 | 2013-06-05 | 上海市基础工程有限公司 | Inflow rotating hinge connector for submarine pipeline and optical cable embedding device |
| CN103836282A (en) * | 2014-03-18 | 2014-06-04 | 江苏亚星波纹管有限公司 | Pull rod limiting type single sleeve expansion joint |
-
1992
- 1992-03-21 CN CN 92211412 patent/CN2127973Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133801A (en) * | 2011-11-23 | 2013-06-05 | 上海市基础工程有限公司 | Inflow rotating hinge connector for submarine pipeline and optical cable embedding device |
| CN102705612A (en) * | 2012-05-30 | 2012-10-03 | 辽宁工程技术大学 | Telescopic joint device for deep well ice conveying pipelines |
| CN103836282A (en) * | 2014-03-18 | 2014-06-04 | 江苏亚星波纹管有限公司 | Pull rod limiting type single sleeve expansion joint |
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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 |