CN201704279U - Flexible groove structure for skirt of coke tower - Google Patents
Flexible groove structure for skirt of coke tower Download PDFInfo
- Publication number
- CN201704279U CN201704279U CN2010201486438U CN201020148643U CN201704279U CN 201704279 U CN201704279 U CN 201704279U CN 2010201486438 U CN2010201486438 U CN 2010201486438U CN 201020148643 U CN201020148643 U CN 201020148643U CN 201704279 U CN201704279 U CN 201704279U
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- skirt
- weld
- flexible groove
- flexible slot
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Abstract
The utility model discloses a flexible groove structure for the skirt of a coke tower. According to the technical scheme of the utility model, a tower body and a skirt have a lap joint structure; the flexible groove is trumpet-shaped and evenly distributed along the skirt; a stress-releasing hole is drilled at the lower end of the flexible groove, an expansion gap is formed in the middle thereof, and an inclined opening is formed from the upper end thereof to the top end of the skirt; the stress-releasing hole and the expansion gap are provided with no welding seam; the inclined welding seam at the upper end of the flexible groove is extended to the fillet weld between the skirt and the tower body; the smooth arc-transition method is adopted to the flexible groove structure, where changes occur to dimensions; and the edge of the hole is smoothly polished. The utility model has the beneficial effects that the rigid constraint at the skirt can be obviously improved, the possibility of cracking in the welding seam can be reduced, and the operation safety of the coke tower can be guaranteed.
Description
Technical field:
What the utility model research related to is a kind of petrochemical equipment, specifically is a kind of skirt flexible slot structure of coke drum.
Background technology:
Coke drum is the nucleus equipment in the coke metallization processes, also is one of worst pressure vessel and equipment of refinery environment for use.Influence is that the tower body distortion is particularly serious with skirt cracking, especially skirt and tower body attachment weld (being called for short the skirt weld seam) cracking in the normal principal element of using of labour coke drum.Find in the industry survey of API (API) tissue: in the destruction example of coke tower, about 78% is attachment weld and the near zone thereof that occurs in tower body and skirt.Because this place is the point of suppon of full tower all wt, stressed complexity, the effect of load such as gravity, the wind that is changed simultaneously carries, interior pressure, temperature; In case weld cracking may cause tower body to come off even collapses, its consequence will be catastrophic.
Traditional treatment method after the commissure cracked in the past is that its polishing is mended by replacing a damaged part mostly, and repair welding is repaired again.But those patched weld seams of polishing produce large-area crackle again after using in a year or so, mend repeatly and split repeatly.
At present, it is exactly vertically to open some long and narrow flexible slots by the top along circumference at the coke tower skirt that a kind of practice is arranged both at home and abroad, upper and lower ends at groove also is drilled with stress relief hole, thereby improve the rigid constraint at skirt place, reduce the suffered stress of weld seam, with the tendency of the junction weld cracking that reduces tower body and skirt.But slot on skirt, the stress concentration factor of itself is just very high.Particularly ftracture easily in the slotted eye top, and these crackles just become the source region of fatigue cracking.The final report of API STRENGTH ON COKE tower investigation in 1998 is found: the skirt of fluting has 89% cracking.These crackles further expand, and finally reach critical crack size, cause fatigure failure, the safe handling of serious threat coke drum.
The utility model content:
Stressed in order to improve the coke drum skirt, the utility model provides a kind of coke drum skirt flexible slot structure, and it is stressed effectively to improve the coke drum skirt, reduce flexible slot weld cracking tendency, and the skirt structure satisfies requirement of strength.
The technical scheme that its technical problem that solves the utility model adopts is: vertically opening some long and narrow flexible slots near its top along circumference with the skirt of overlap joint around the tower body, flexible slot adopts trumpet type, and is uniform along skirt.The flexible slot lower end is drilled with stress relief hole, and dilatation joint is opened in the centre, and the flexible slot upper end is opened angle and extended to the skirt top.
In addition, stress relief hole and dilatation joint do not have weld seam, and flexible slot upper end inclined weld extends to the fillet weld between skirt and tower body.
Certainly, the stress relief hole in the flexible slot and the transition position of dilatation joint, dilatation joint and hydraucone inclined weld transition position and inclined weld and fillet weld transition position all adopt level and smooth arc transition form, the slotted eye edge slyness of should polishing.
The beneficial effects of the utility model are, offer the rigid constraint that stress relief hole and dilatation joint can obviously improve the skirt structure, and it is stressed effectively to improve the coke drum skirt.Flexible slot upper end be a broadening formation, and scantlings of the structure variation place all adopts level and smooth arc transition form, has effectively reduced the structure stress concentration factor, has reduced skirt weld cracking and crack propagation and has been inclined to.And this welded construction with do not compare before the opening, welding bead length increases, and satisfies coke drum skirt requirement of strength.
Description of drawings:
Further specify the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is the side structure synoptic diagram of coke drum skirt of the present utility model and tower body.
Fig. 2 is a coke drum skirt flexible slot structural representation of the present utility model.
Drawing reference numeral is as follows:
The 1-tower body; The 2-skirt; 3-tower body and skirt connection angle weld seam;
4-skirt inclined weld; The 5-dilatation joint; The 6-stress relief hole;
7-flexible slot stress relief hole and dilatation joint transition position;
8-dilatation joint and hydraucone inclined weld transition position;
9-inclined weld 4 and fillet weld 3 scantlings of the structure variations place.
Embodiment:
For technique means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As depicted in figs. 1 and 2, as shown in Figure 1, coke drum tower body 1 adopts the lap jointing type structure with skirt 2, and is uniform along skirt.The flexible slot lower end is drilled with stress relief hole 6, and dilatation joint 5 is opened in the centre, and the flexible slot upper end is opened hydraucone and extended to the skirt top.Stress relief hole and dilatation joint do not have weld seam, and flexible slot upper end inclined weld 4 extends to the fillet weld 3 between skirt and tower body.Flexible slot stress relief hole 6 and dilatation joint 5 transition positions 7, dilatation joint 5 and hydraucone inclined weld 4 transition positions 8 and inclined weld 4 and fillet weld 3 transition positions 9 all adopt level and smooth arc transition form.The flexible slot bore edges slyness of should polishing.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification sheets just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
1. coke drum skirt flexible slot structure, it is vertically opening some long and narrow flexible slots near its top along circumference with the skirt of overlap joint around the tower body, and flexible slot adopts trumpet type, and is uniform along skirt; Described flexible slot lower end is drilled with stress relief hole, and dilatation joint is opened in the centre, and described flexible slot upper end is opened angle and extended to the skirt top; Described stress relief hole and dilatation joint do not have weld seam, and described flexible slot upper end inclined weld extends to the fillet weld between skirt and tower body; It is characterized in that the stress relief hole in the described flexible slot and the transition position of dilatation joint, dilatation joint and hydraucone inclined weld transition position and inclined weld and fillet weld transition position all adopt level and smooth arc transition form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201486438U CN201704279U (en) | 2010-04-01 | 2010-04-01 | Flexible groove structure for skirt of coke tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201486438U CN201704279U (en) | 2010-04-01 | 2010-04-01 | Flexible groove structure for skirt of coke tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201704279U true CN201704279U (en) | 2011-01-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201486438U Expired - Fee Related CN201704279U (en) | 2010-04-01 | 2010-04-01 | Flexible groove structure for skirt of coke tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201704279U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107384468A (en) * | 2017-05-26 | 2017-11-24 | 南京工业大学 | Coke tower and manufacturing method thereof |
| WO2020027886A1 (en) | 2018-08-02 | 2020-02-06 | Azz Wsi Llc | Support skirt for coking drum |
-
2010
- 2010-04-01 CN CN2010201486438U patent/CN201704279U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107384468A (en) * | 2017-05-26 | 2017-11-24 | 南京工业大学 | Coke tower and manufacturing method thereof |
| CN107384468B (en) * | 2017-05-26 | 2019-04-09 | 南京工业大学 | Coke tower and manufacturing method thereof |
| WO2020027886A1 (en) | 2018-08-02 | 2020-02-06 | Azz Wsi Llc | Support skirt for coking drum |
| US10676677B2 (en) | 2018-08-02 | 2020-06-09 | Azz Wsi Llc | Support skirt for coking drum |
| JP2021524540A (en) * | 2018-08-02 | 2021-09-13 | エイゼットゼット ダブリューエスアイ エルエルシー | Supporting skirt for caulking drums |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110112 Termination date: 20110401 |