CN201159589Y - Water beam of heating stove - Google Patents
Water beam of heating stove Download PDFInfo
- Publication number
- CN201159589Y CN201159589Y CNU2007200773679U CN200720077367U CN201159589Y CN 201159589 Y CN201159589 Y CN 201159589Y CN U2007200773679 U CNU2007200773679 U CN U2007200773679U CN 200720077367 U CN200720077367 U CN 200720077367U CN 201159589 Y CN201159589 Y CN 201159589Y
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- step rate
- watermark
- temperature difference
- water beam
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- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Metal Rolling (AREA)
Abstract
The utility model discloses a water beam for a heating furnace, which comprises walking beams and anchor beams. The walking beams and the anchor beams are alternately arranged in parallel, with both ends parallel to the central line of the furnace and the middle parts angled with the central line of the furnace. The water beam is capable of getting rid of the defect of watermark temperature difference and ensures stability in the finish rolling process, thus improving the quality of finished coiled plates.
Description
Technical field
The utility model relates to a kind of rolling mill practice equipment, relates in particular to a kind of walking beam furnace.
Background technology
Walking beam furnace is the seventies for solving the type of furnace that watermark defective that the slideway pusher-type furnace brings designs.As shown in Figure 1, in its stove the water beam comprise step rate (M1, M2, M3, M4) and built-in beam (F1, F2, F3, F4, F5), beam and the heat-resisting cushion block distribution of the slab contact point usefulness shape of a hoof, step rate and built-in beam are vertically arranged.Slab is placed on the cushion block of water beam after going into stove, and conveyance is alternately finished by step rate and built-in beam in the stove of slab from the charging end to the discharge end.Step rate and built-in beam all are with water-cooled, are surrounded by insulation material and refractory material outside the water beam.
For reducing the influence that the cooling of water beam is heated to slab, taked two more favourable measures when design: one is the water beam transverse translation 300mm at soaking zone 9m place, in order to changing the temperature difference position that water beam has before this produced the heating slab, thereby alleviate the temperature difference (also claiming the watermark temperature difference) that produces because of the cooling of water beam before this.Its two area for minimizing watermark temperature, shape of a hoof cushion block is by interlaced arrangement.
As shown in Figure 2, wherein 1 is the watermark point, and 2 is non-watermark point.The position of slab contact water-cooled beam is called the watermark point because water flowing circulation cooling in the beam, in the cooling water beam also to beam on cushion block implemented cooling, between cushion block and slab, make the low watermark temperature difference that produces of temperature of contact point because of the effect of temperature conduction.The watermark temperature difference can be divided into the step rate watermark temperature difference and the built-in beam watermark temperature difference because of the function of water beam.Slab moves forward by the motion of step rate in the stove, and step rate moves the one-period 580mm that can advance with the regular-shape motion track, thereby makes slab be delivered to discharge end gradually.Contact point when step rate holds up slab claims step rate watermark point; After step rate descended, slab was placed on the contact point on the built-in beam, is referred to as built-in beam watermark point.
The heating furnace furnace superintendent is 40 meters, wherein deduct to take on the material two ends and take on nearly 3 meters of gap of material, and the step rate all 580mm that advance, so step rate moves about 65 cycles and can reach 0.58m*65=37.70m to discharge end.Step rate operation week age needs 60 seconds, wherein contacts step rate, other 30 seconds contact built-in beams in 30 seconds.Actual slab from the time that charging end moves to discharge end be 30 seconds=1950 seconds ≈ of 65 all * 32.5 minutes.The actual slab contact step rate cushion block time is about 32.5 minutes, and the watermark temperature difference is little.
Calculated by 160 minutes the shortest heat time heating times, slab contact built-in beam watermark time=160 minute-32.5 minutes (the contact step rate time) in the actual stove=127.5 minutes, therefore, it is big that built-in beam produces the watermark temperature difference.
Hold from packing into that the 31m beam is a straight line before the soaking zone, slab holds up that contact because of contact point repeats, makes the stack of watermark low temperature when putting down on the same straight line of water beam, and low-temperature region enlarges.Therefore make the watermark temperature more and more lower, the watermark temperature difference is increasing, RT2 real-time curve chart as shown in Figure 3, and wherein A is a step rate watermark point, and B is a built-in beam watermark point, and RT2 is the temperature of slab after roughing second frame is rolling.
Because the temperature difference is big, the high temperature dot distortion in rolling is big, and the low temperature point deformation is little, makes width, thickness, the convexity precision of band steel be difficult to control, has influenced the raising of product quality significantly.Main influence as following:
1.. the influence of thickness and precision: because the watermark point temperature difference is big, cause the length direction of slab to have the spacing temperature difference, though can do adjustment to greatest extent through the finish rolling operational sequence, that its thickness and precision still fluctuates is very big, and hit rate is low.
2.. the influence of width accuracy: because the watermark temperature difference is bigger, cause the width of rolled piece to differ, make width accuracy poor, hit rate is low.
3.. the influence of rolling stability: because the watermark temperature difference is bigger, the factor of influence of rolled stability such as produce strip running deviation, roll has brokenly increased the difficulty of operation control.
Summary of the invention
The purpose of this utility model provides a kind of heating furnace water beam, can solve watermark temperature difference defective, with the stability of assurance finish rolling in the operation of rolling, thus the end product quality of raising coiled sheet.
The purpose of this utility model is achieved in that a kind of heating furnace water beam, comprise step rate, built-in beam, step rate and built-in beam alternately are arranged in parallel, and the both ends of described step rate and built-in beam and stove center line be arranged in parallel, and mid portion and stove center line have angle.
Preferably, the angle that forms between described step rate and built-in beam mid portion and the stove center line is 35-55 °.
Preferably, the distance between described step rate and the built-in beam is 900-1100mm.
Preferably, described step rate and built-in beam is shaped as straight plate shape.
Preferably, being shaped as of described step rate and built-in beam bends shape.
The utility model is owing to adopted technique scheme, make it compared with prior art, have the following advantages and good effect: because slab is through the regular-shape motion reach of step rate, the watermark point that makes slab and built-in beam contact with step rate constantly changes, can not distinguish constantly stack point-blank, make that the step rate watermark temperature difference and the built-in beam watermark temperature difference are all very little, solved watermark temperature difference defective substantially.
Description of drawings
Fig. 1 is that the water beam of prior art is arranged schematic diagram;
The watermark temperature difference schematic diagram that Fig. 2 produces for prior art;
Fig. 3 transports the RT2 real-time curve chart of slab for prior art;
Fig. 4 is that first kind of water beam of the present utility model arranged schematic diagram;
Fig. 5 is the watermark temperature difference schematic diagram that first kind of water beam arrangement of the present utility model produces;
Fig. 6 is that second kind of water beam of the present utility model arranged schematic diagram;
Fig. 7 is that the third water beam of the present utility model is arranged schematic diagram.
The specific embodiment
As shown in Figure 4, be the layout of water beam in the present embodiment heating furnace, wherein M1, M2, M3, M4 are step rate, and F1, F2, F3, F4, F5 are built-in beam, and step rate and built-in beam are alternately arranged.
In the present embodiment, the discharge end of stove and charging end, consider steel machine and the long stroke dress steel machine taken out, so keeping the both ends and the stove center line of step rate and built-in beam be arranged in parallel, mid portion and stove center line have angle, this angular range is 35-55 °, if less than the easily vertically stack of 35 ° of watermark points, if greater than the easily laterally stack of 55 ° of watermark points.Be 45 ° in the present embodiment.
Being shaped as straight plate shape or being bending shape of step rate and built-in beam, in the present embodiment, step rate and built-in beam in the stove alternately are divided into left-right symmetry two parts, all are oblique arrangement, promptly are combined to form bending shape, and the preferred values of this angle is 90 °.
Distance between step rate and the built-in beam is 900-1100mm, if less than 900mm, the number of water beam can increase in the stove, thereby has increased the possibility of watermark point stack.If greater than 1100mm, the bight of slab is very likely bumped the anti-material of scraping the water beam and is caused anti-material to come off, and severe patient may also can cause the water beam to leak.In the present embodiment, the water case bay is decided to be 1000mm.
The watermark temperature difference that present embodiment produces as shown in Figure 5, wherein 1 is the watermark point, 2 is non-watermark point.Following table is the improvement contrast of present embodiment and prior art:
| Sequence number | Content | The present invention | |
| 1 | The arrangement of fine strain of millet | Intersect at an angle of 90 | Vertically |
| 2 | Step rate watermark point | In continuous variation | Constantly stack point-blank |
| 3 | The step rate watermark temperature difference | Little | Medium |
| 4 | Built-in beam watermark point | In continuous variation | Constantly stack point-blank |
| 5 | The built-in beam watermark temperature difference | Little | Greatly |
More than be a preferred embodiment of the present utility model, still, protection domain of the present utility model is not limited thereto.Shown in Fig. 6,7, in these two embodiment, the shape of step rate M1, M2, M3, M4 and built-in beam F1, F2, F3, F4, F5 is selected straight plate shape for use, is oblique arrangement, and mid portion and stove center line angle are 45 °.
Claims (5)
1. a heating furnace water beam comprises step rate, built-in beam, and step rate and built-in beam alternately are arranged in parallel, and it is characterized in that: the both ends of described step rate and built-in beam and stove center line be arranged in parallel, and mid portion and stove center line have angle.
2. heating furnace water beam as claimed in claim 1 is characterized in that: the angle that forms between described step rate and built-in beam mid portion and the stove center line is 35-55 °.
3. heating furnace water beam as claimed in claim 2 is characterized in that: the distance between described step rate and the built-in beam is 900-1100mm.
4. as claim 1 or 2 or 3 any described heating furnace water beams, it is characterized in that: described step rate and built-in beam be shaped as straight plate shape.
5. as claim 1 or 2 or 3 any described heating furnace water beams, it is characterized in that: being shaped as of described step rate and built-in beam bends shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200773679U CN201159589Y (en) | 2007-12-27 | 2007-12-27 | Water beam of heating stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200773679U CN201159589Y (en) | 2007-12-27 | 2007-12-27 | Water beam of heating stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201159589Y true CN201159589Y (en) | 2008-12-03 |
Family
ID=40110172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200773679U Expired - Fee Related CN201159589Y (en) | 2007-12-27 | 2007-12-27 | Water beam of heating stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201159589Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103337A (en) * | 2013-02-21 | 2013-05-15 | 武汉钢铁(集团)公司 | Method for decreasing walking beam heating furnace steel billet water beam black mark |
-
2007
- 2007-12-27 CN CNU2007200773679U patent/CN201159589Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103337A (en) * | 2013-02-21 | 2013-05-15 | 武汉钢铁(集团)公司 | Method for decreasing walking beam heating furnace steel billet water beam black mark |
| CN103103337B (en) * | 2013-02-21 | 2014-04-16 | 武汉钢铁(集团)公司 | Method for decreasing walking beam heating furnace steel billet water beam black mark |
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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: 20081203 Termination date: 20151227 |
|
| EXPY | Termination of patent right or utility model |