CN202139262U - Spacer flange for muffle pipe of annealing furnace - Google Patents
Spacer flange for muffle pipe of annealing furnace Download PDFInfo
- Publication number
- CN202139262U CN202139262U CN 201120213884 CN201120213884U CN202139262U CN 202139262 U CN202139262 U CN 202139262U CN 201120213884 CN201120213884 CN 201120213884 CN 201120213884 U CN201120213884 U CN 201120213884U CN 202139262 U CN202139262 U CN 202139262U
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- CN
- China
- Prior art keywords
- muffle tube
- rib plate
- vertical rib
- muffle
- lehre
- 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.)
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- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
A spacer flange for a muffle pipe of an annealing furnace comprises a circle of flange surface connected in the middle of a muffle pipe, and is characterized in that the circle of flange surface is divided into a plurality of sections to form a diamond structure, the diamond forming the flange surface is welded on a vertical rib plate firstly, and the vertical rib plate is connected and fixed with the middle part of the muffle pipe. The spacer flange meets the hoisting demands and simultaneously eliminates the mutual action of the hot stress, and the service life of the muffle pipe is prolonged.
Description
Technical field
The utility model relates to a kind of muffle tube spacer flanger, is adapted at using in the muffle tube furnace installation, also can use under identical work condition environment in the furnace installation.
Background technology
The stainless steel clean annealing production line that this paper relates to is the large-scale production line that is manufactured and designed by Austrian EBNER company; It is the state-of-the-art stainless steel clean annealing production line of present domestic introduction; Its total height is 56m, and can handle width is 650-1350mm, and thickness is the 0.2-3.0mm stainless steel sheet strip.Wherein, lehre adopts vertical retort furnace, and big (basic size is φ 1800mm * 27939mm), weight big (weight is 18000kg during basic size) to the muffle tube size, and working conditions is abominable, the inner 100%H that fills during annealing in the stove
2Protective atmosphere outside adopts 40 to be symmetrically distributed in body of heater 180 degree both sides according to what certain rule was arranged, is used for the heating muffle body of heater with LPG combustion gas or Sweet natural gas burner.Normal working temperature in the retort furnace is 1030-1150 ℃, and maximum operating temperature can reach 1200 ℃.Quality and output that whether it runs well and directly have influence on the stainless steel sheet strip clean annealing.
The stove of lehre is by the inlet seal device, combustion chamber body, muffle tube, cooling section, compositions such as backward channel.Muffle tube is installed in the body of heater, and its top flange and cooling section are used bolted-on connection, seal with silicone rubber O-ring therebetween.In the unsettled insertion inlet seal case in bottom, charge into quench hot oil in the inlet seal box body, to cut off muffle tube and combustion chamber.The stainless steel strip operation scheme is a upstriker, promptly is with steel to get into from the stove bottom, comes out from stove top, arrives backward channel through the cooling section deflector roll.The structure of muffle tube is seen Fig. 3, muffle tube spacer flanger such as Fig. 3 before improving.
In the use of retort furnace; In order to guarantee the inner band of stove steel annealing temperature; Stove takes a kind of discontinuity heating to keep the mode of temperature, and stove zone burner is arranged in 180 ° of both sides, diagonal angle, has the heating process of cooling between temperature among a small circle from microcosmic explanation muffle tube.
There is a circle flange face muffle tube middle part.This flange face is waited lifting when mounted and is used.Flange face around muffle tube circumferential direction one circle, is divided into 12 with the 16mm Plate Steel, every all with horse not body be welded, welding material and mother metal are not same a kind of materials.Because the heating burner is distributed in the muffle tube both sides, so in receiving thermal process, exist heating temperature inhomogeneous inevitably.Zone, burner position is than non-burner part heat block, so its thermal distortion is inconsistent, and the muffle tube body also will bear the mass action of itself and produce the longitudinal direction elongation in the thermal deformation process.Spacer flanger produces then that horizontal direction is swollen to rise, and both produce the different directions tensile stress mutually under the high temperature.Simultaneously, the flange face distortion in the same circle scope is also inconsistent, the also constraint between the existence mutually.Therefore, in use for some time, bulge just appears in the facial position of muffle tube spacer flanger, burns, and the circular section becomes defectives such as elliptic cross-section, has a strong impact on the safe handling of muffle tube.
(1) muffle tube spacer flanger facial disfigurement
Spacer flanger is apart from the horse about 9.6m of top flange place not, and its structure is whole circle welding gusset, segmentation at 360 circumferential directions with every at a distance from 30mm spacing welding stud.Welding gusset and horse be the ontological existence difference in thickness not, under high temperature action, produces uneven tensile stress mutually, causes producing ellipse at the body at flange position.
(2) muffle tube spacer flanger face bulge
Local bulge appears in lifting flange position in the centre, and horse is the about 30mm of the outside hill height of cylindrical shell not, and the diameter of bulge is about φ 450mm, and the bulge surface of position is particulate state dross phenomenon, and surfaces externally and internally is coarse, and long pit of obvious stretching shape and point-like pit are arranged on every side.
(3) muffle tube spacer flanger face burns
Muffle tube is burnt by flame at lifting flange place in the centre, hole occurs.This burns the place and just in time faces toward the burner position, and after the muffle tube bulge, in work, flame heats facing to this place always, as a hole occurs, and hydrogen gas leakage comes out to burn, and its temperature is very high, has aggravated the ablation effect, finally burns the muffle tube mother metal.
Summary of the invention
The utility model technical problem to be solved provides a kind of lehre muffle tube spacer flanger, has suppressed and muffle tube body thermal distortion stress influence each other under the temperature action in use, the work-ing life of having improved muffle tube effectively.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of lehre muffle tube spacer flanger; It comprises a circle flange face that is connected the muffle tube middle part; It is characterized in that: a described circle flange face is divided into a plurality of; Form box structure, the square that forms flange face is welded on earlier on the vertical rib plate, and vertical rib plate is connected fixing with the muffle tube middle part again.
As preferably, described flange face is divided into the box structure of 24 equal lengths, and accordingly, vertical rib plate also is arranged to 24, and is connected the middle part of muffle tube vertically, equally spacedly.
Further improve, the weld seam that described vertical rib plate is welded on the muffle tube is consistent with the muffle tube prolonging direction.
At last, the length of described box structure is 40mm.
Compared with prior art; The advantage of the utility model is: the spacer flanger face has reduced the welding with muffle tube mother metal body; And the weld seam of vertical rib plate is consistent with the muffle tube prolonging direction; Reduce muffle tube spacer flanger face and the mutual reactive force of muffle tube mother metal body, avoided the deformation effect that checks and balance, the work-ing life of having improved muffle tube.
Description of drawings
Fig. 1 is the front view of the utility model;
Fig. 2 is the local structure figure of the utility model;
Fig. 3 is the front view before improving;
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1: a kind of novel lehre muffle tube spacer flanger; Comprise muffle tube 3, be connected circle flange face 10 and a vertical rib plate 2 of muffle tube 3 middle parts, a described circle flange face 10 is divided into the box structure 1 of 24 equal lengths, and length is 40mm; Accordingly; Vertical rib plate 2 also is arranged to 24, and vertical rib plate 2 is to be arranged in vertically, equally spacedly on the periphery of muffle tube 3, and box structure 1 is welded on earlier on the vertical rib plate 2; Vertical rib plate 2 is weldingly fixed on the muffle tube 3 again, and realization box structure 1 was fixed with indirect connection of muffle tube 3 middle parts; And vertical rib plate 2 is consistent with weld seam and muffle tube 3 prolonging directions between the muffle tube 3.Reduce muffle tube 3 spacer flanger faces 1 and the mutual reactive forces of muffle tube 3 mother metal bodies like this, avoided the deformation effect that checks and balance, the work-ing life of having improved muffle tube 3.
This technology is mainly used having the muffle tube furnace installation of same case, also can use furnace installation under identical work condition environment.
Claims (4)
1. lehre muffle tube spacer flanger; It comprises a circle flange face that is connected the muffle tube middle part; It is characterized in that: a described circle flange face is divided into a plurality of; Form box structure, the square that forms flange face is welded on earlier on the vertical rib plate, and vertical rib plate is connected fixing with the muffle tube middle part again.
2. a kind of lehre muffle tube spacer flanger according to claim 1; It is characterized in that: described flange face is divided into the box structure of 24 equal lengths; Accordingly, vertical rib plate also is arranged to 24, and vertical rib plate is the middle part that is connected muffle tube vertically, equally spacedly.
3. a kind of lehre muffle tube spacer flanger according to claim 2, it is characterized in that: the weld seam that described vertical rib plate is welded on the muffle tube is consistent with the muffle tube prolonging direction.
4. according to claim 1 or 2 or 3 described a kind of lehre muffle tube spacer flangers, it is characterized in that: the length of described box structure is 40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120213884 CN202139262U (en) | 2011-06-23 | 2011-06-23 | Spacer flange for muffle pipe of annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120213884 CN202139262U (en) | 2011-06-23 | 2011-06-23 | Spacer flange for muffle pipe of annealing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202139262U true CN202139262U (en) | 2012-02-08 |
Family
ID=45550334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120213884 Expired - Fee Related CN202139262U (en) | 2011-06-23 | 2011-06-23 | Spacer flange for muffle pipe of annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202139262U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008844A (en) * | 2012-12-18 | 2013-04-03 | 中冶南方(武汉)威仕工业炉有限公司 | Assembly welding process of muffle pipe double-layer flange |
-
2011
- 2011-06-23 CN CN 201120213884 patent/CN202139262U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008844A (en) * | 2012-12-18 | 2013-04-03 | 中冶南方(武汉)威仕工业炉有限公司 | Assembly welding process of muffle pipe double-layer flange |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20190623 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |