CN103084421B - Spray cooling device after a kind of large-scale shell ring hot rolling of Parameter adjustable - Google Patents
Spray cooling device after a kind of large-scale shell ring hot rolling of Parameter adjustable Download PDFInfo
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- CN103084421B CN103084421B CN201310027210.5A CN201310027210A CN103084421B CN 103084421 B CN103084421 B CN 103084421B CN 201310027210 A CN201310027210 A CN 201310027210A CN 103084421 B CN103084421 B CN 103084421B
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- cooling pipe
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- 238000001816 cooling Methods 0.000 title claims abstract description 170
- 239000007921 spray Substances 0.000 title claims abstract description 55
- 238000005098 hot rolling Methods 0.000 title claims abstract description 16
- 238000005507 spraying Methods 0.000 claims abstract description 116
- 239000000498 cooling water Substances 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 238000010791 quenching Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007323 disproportionation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The present invention relates to the cooling device of spraying cooling after a kind of large-scale shell ring hot rolling of Parameter adjustable, comprise spraying cooling unit and lower spraying cooling unit, it is characterized in that: upper spraying cooling unit is made up of upper collection plate and the upper spraying cooling pipe be distributed on upper collection plate, lower spraying cooling unit is made up of next part plate and the lower spraying cooling pipe be distributed on next part plate, upper and lower spraying cooling pipe is interconnected to constitute by spray base tube and spray pipe box, quantity >=1 of the spray base tube that every root spraying cooling pipe comprises, quantity >=0 of spray pipe box comprised; On upper spraying cooling unit, all upper spraying cooling pipe pipe end lines form cambered surface, and on lower spraying cooling unit, all lower spraying cooling pipe pipe end lines form cambered surface.Its advantage is: by changing the pressure of cooling water, effectively can remove shell ring and cooling initial steam blanket, improve cooling effectiveness; By changing the length of cooling tube, the roller repairing of the shell ring of different size can be realized.
Description
Technical field
The invention belongs to cooling device field, relate to the cooling device of spraying cooling after a kind of large-scale shell ring hot rolling of Parameter adjustable.
Background technology
Large-scale shell ring continuous rolling, as a kind of emerging technique, has the advantages such as precision is high, allowance is few, stock utilization is high, interiors of products quality is good.The choosing and the control of process for cooling of the type of cooling after hot rolling is the critical process step ensureing large-scale shell ring product serviceability.Adopt traditional Technology for Heating Processing, when quench cooled is carried out to shell ring, because shell ring size is large, shell ring different parts axially can not cool simultaneously, cooling has the regular hour poor, easily cause temperature distributing disproportionation even, thus produce larger residual stress, cause shell ring axially and in radial direction to have larger distortion; Because shell ring is from great, easily produces moderate finite deformation diametrically when quenching, reducing the dimensional accuracy of shell ring, adverse influence is produced to shell ring performance; Meanwhile, during quench cooled, shell ring surface easily produces steam blanket, affects the heat transfer of shell ring.In addition, prior heat treatment process cost is high, is difficult to realize mass production, can not meet the wilderness demand of domestic market to nuclear power, hydrogenation and coal liquefaction shell ring.In order to improve the efficiency of large-scale shell ring roller repairing, reducing the cost of roller repairing, improving the mechanical property of shell ring, be necessary that research adopts new process for cooling to replace traditional Technology for Heating Processing.
Spraying cooling is a kind of effective heat-transferring method, has high cooling capacity, is water pressurization to be broken shape or vaporific to become to be similar to slope, forms drop bundle and impacts cooled object.Not yet retrieve the spray equipment that can be used in large-scale shell ring roller repairing at present, how to eliminate the impact that the steam blanket, distortion etc. that produce in cooling procedure conduct heat on shell ring, improve the surface quality of shell ring, realizing the Homogeneous cooling of many specifications shell ring, is the Focal point and difficult point of spray cooling device design.
Summary of the invention
The object of the invention is to solve an above-mentioned difficult problem, the cooling device of spraying cooling after a kind of large-scale shell ring hot rolling of Parameter adjustable is provided.This device can solve shell ring preferably and adopt the even problem of inhomogeneous cooling occurred during quench cooled.
Technical scheme of the present invention:
Spray cooling device of the present invention comprises for the upper spraying cooling unit of cooling hot-rolled shell ring upper surface and the lower spraying cooling unit for cooling shell ring lower surface, upper spraying cooling unit is made up of upper collection plate and the upper spraying cooling pipe be uniformly distributed on upper collection plate, lower spraying cooling unit is made up of next part plate and the lower spraying cooling pipe be uniformly distributed on next part plate, upper and lower spraying cooling pipe is interconnected to constitute by spray base tube and spray pipe box, quantity>=1 of the spray base tube that every root spraying cooling pipe comprises, quantity>=0 of spray pipe box comprised; On upper spraying cooling unit, all upper spraying cooling pipe pipe end lines form the cambered surface of the indent that is coincide with cooled hot rolling shell ring upper surface, and on lower spraying cooling unit, all lower spraying cooling pipe pipe end lines form the cambered surface of the evagination that is coincide with cooled hot rolling shell ring lower surface; If the upper spraying cooling pipe h of upper collection plate center
1as benchmark, in the cambered surface that upper spraying cooling pipe pipe end is formed, the length of the upper spraying cooling pipe that radian is corresponding is arbitrarily:
Wherein: h
1for the length of the upper spraying cooling pipe of upper collection plate center, h
2for the upper spraying cooling pipe comparatively benchmark h calculated
1the length increased, R is arc radius, and 2 θ are central angle, the chord length of L corresponding to the spraying cooling tube end of calculating;
In the cambered surface that lower spraying cooling pipe pipe end is formed, the length of the lower spraying cooling pipe that radian is corresponding is arbitrarily:
H
1＝h
3-h
4＝θ×L
Wherein: h
3for the length of the lower spraying cooling pipe of next part plate center, be set to benchmark, h
4for the lower spraying cooling pipe comparatively benchmark h calculated
3the length reduced.
Described upper and lower collection plate is evenly distributed with threaded apertures;
All there is external screw thread at the two ends of described spray base tube;
All there is internal thread at described spray pipe box two ends;
Upper spraying cooling pipe on described upper spraying cooling unit and lower spraying cooling unit or the length of lower spraying cooling pipe can regulate, its regulative mode is: two ends are placed in Ji Banshang with externally threaded spray base tube one end, and be threaded connection, the other end needs to connect spray pipe box according to length, spray pipe box is second connection spray base tube again, regulates spraying cooling pipe or lower spraying cooling pipe total length on every root according to this;
Upper spraying cooling unit and lower spraying cooling unit be the corresponding upper and lower surface being placed in the shell ring of cooling respectively, rely on itself and shell ring relatively rotate realize spraying cooling;
By the length of the quantity and every root cooling tube that change upper spraying cooling pipe and lower spraying cooling pipe, form different cooling arcs, realize the roller repairing of different size shell ring.
Beneficial effect of the present invention:
By changing the pressure of cooling water, effectively can remove shell ring and cooling initial steam blanket, improve cooling effectiveness; By changing the length of cooling tube, the roller repairing of the shell ring of different size can be realized.
Accompanying drawing explanation
Spraying cooling schematic diagram after the large-scale shell ring hot rolling of Fig. 1;
Fig. 2 upper and lower spray collection plate schematic diagram;
Fig. 3 sprays base tube schematic diagram;
Fig. 4 sprays pipe box cross-sectional schematic;
The each relationship between variables schematic diagram of spraying cooling unit on Fig. 5;
The each relationship between variables schematic diagram of spraying cooling unit under Fig. 6.
In figure: 1, upper collection plate; 2, next part plate; 3, top roll; 4, lower roll; 5, guide roller; 6, shell ring; 7, screwed hole; 8, the upper spraying cooling pipe of upper collection plate center; 9, the lower spraying cooling pipe of next part plate center.
Detailed description of the invention
With reference to accompanying drawing, this large-scale shell ring spray cooling device comprises for the upper spraying cooling unit of cooling hot-rolled shell ring upper surface and the lower spraying cooling unit for cooling shell ring lower surface, upper spraying cooling unit is made up of upper collection plate and the upper spraying cooling pipe be uniformly distributed on upper collection plate, lower spraying cooling unit is made up of next part plate and the lower spraying cooling pipe be uniformly distributed on next part plate, on, lower spraying cooling pipe is interconnected to constitute with externally threaded spray base tube and the female spray pipe box of two ends band by two ends, quantity >=1 of the spray base tube that every root spraying cooling pipe comprises, quantity >=0 of the spray pipe box comprised, on upper spraying cooling unit, all upper spraying cooling pipe pipe end lines form the cambered surface of the indent that is coincide with cooled hot rolling shell ring upper surface, and on lower spraying cooling unit, all lower spraying cooling pipe pipe end lines form the cambered surface of the evagination that is coincide with cooled hot rolling shell ring lower surface, upper spraying cooling pipe on upper spraying cooling unit and lower spraying cooling unit or the length of lower spraying cooling pipe can regulate, its regulative mode is: two ends are placed in Ji Banshang with externally threaded spray base tube one end, and be threaded connection, the other end needs to connect spray pipe box according to length, spray pipe box is second connection spray base tube again, regulates spraying cooling pipe or lower spraying cooling pipe total length on every root according to this.Spraying cooling length of tube required for different size shell ring is different, and above spraying cooling unit is example and in conjunction with in schematic diagram 5, Fig. 5,1 representative collects plate, and the upper spraying cooling pipe of 8 representative upper collection plate center, if the spraying cooling length of tube h of upper collection plate center
1for benchmark, if the spraying cooling length of tube increased is h
2, arc radius is R, central angle is 2 θ, according to the relation between each variable, again because large-scale cylinder joint radial dimension is large, so can replace chord length by arc length approx, thus can estimate the length of spraying cooling pipe corresponding to any radian according to this
H＝h
1+h
2(1)
h
2＝R×θ×cosθ(2)
sinθ＝L/R(3)
The length H of the spraying cooling pipe that can estimate under different radian based on above formula is:
In like manner, the length h of the spraying cooling pipe 9 of collection plate center is set
3for benchmark, the spraying cooling length of tube of minimizing is h
4, lower spray cooling device can the Using such method length that calculates shower be:
H
1＝h
3-h
4＝θ×L(5)
According to the length of spraying cooling pipe on formula (4) and the upper and lower collection plate of (5) adjustment spray cooling device, the line of the lower end of all spraying cooling pipes is made to form the circular arc concentric with shell ring, and with the distance controlling on shell ring surface in OK range.After large-scale shell ring rolling terminates, upper and lower roll is with less drafts clamping shell ring, shell ring is rotated under the drive of frictional force, the upper and lower spray collection plate that spraying cooling pipe is housed is extend into shell ring inside, cooling while realizing shell ring upper and lower surface by regulating the unlatching of hydraulic pressure, the water yield and spraying cooling pipe simultaneously.After adopting this device, increase the effective area of impact zone, eliminate the impact that steam blanket conducts heat on shell ring.The feature of large-scale shell ring spray cooling device: rotation limit, (1) shell ring limit cools, and has corrected the ovality because residual stress causes, ensure that the dimensional accuracy of shell ring; (2) regulate the water yield of shell ring surfaces externally and internally, make shell ring surfaces externally and internally cooling rate be similar to identical, reduce the temperature difference of surfaces externally and internally, ensure that the surface quality of shell ring; (3) there is the speed of cooling and the advantage such as uniformity is high, production efficiency is high, integrated cost is low compared with original shell ring Technology for Heating Processing.
Embodiment one
By the spray cooling device adopting the present invention to propose, rear spraying cooling is rolled to large-scale shell ring and simulates.The uniformity of shell ring surfaces externally and internally Temperature Distribution after analysis employing the method.
The specification of the shell ring adopted: external diameter: d
1=5860mm, internal diameter: d
2=4813mm, width: 2680mm; The rotating speed of top and bottom rolls is 0.35rad/s.The base attribute of material: yield limit: 58MPa; Elastic modelling quantity 90000MPa; Poisson's ratio: 0.3; Its surplus such as density, specific heat is the function of temperature.Be 0.12rad/s by calculating known shell ring rotating speed, setting its initial temperature is 900 DEG C.The height of adjustment cooling water pipe makes the circular arc of its end and shell ring concentric and at a distance of 40mm, meanwhile, the angle in spraying cooling arc and the shell ring center of circle is 60 degree, and its schematic diagram is as Fig. 1.
Get arbitrarily 2 points on shell ring surfaces externally and internally, be designated as A point, B point, variation tendency is as shown in table 1 in time to analyze its temperature
Table 1 shell ring surfaces externally and internally node temperature variation tendency in time
| Time/s | The number of turns/q | Outer surface/DEG C | Inner surface/DEG C | The temperature difference/DEG C |
| 62.8 | 1 | 135.723 | 127.102 | 8.621 |
| 314 | 5 | 120.162 | 114.037 | 6.125 |
| 628 | 10 | 109.211 | 101.931 | 5.280 |
| 942 | 15 | 100.253 | 93.955 | 6.298 |
| 1257.6 | 20 | 92.185 | 87.619 | 4.566 |
| 1570 | 25 | 82.234 | 75.874 | 6.360 |
| 1884 | 30 | 73.298 | 66.398 | 5.900 |
As can be known from the above table, adopt spray cooling device of the present invention, the inside and outside surface temperature of shell ring is more or less the same, and becomes stepped slow decline, and maximum temperature difference is 8.621 DEG C, and cooling evenly.
Adopt traditional quenching technical cooling, in like manner get A point and B point on the inside and outside surface of shell ring, situation of change is as shown in table 2 in time to record its temperature
Table 2 shell ring surfaces externally and internally node temperature variation tendency in time
| Time/s | The number of turns/q | Outer surface/DEG C | Inner surface/DEG C | The temperature difference/DEG C |
| 62.8 | 1 | 197.88 | 188.52 | 9.36 |
| 314 | 5 | 181.56 | 169.03 | 12.53 |
| 628 | 10 | 164.92 | 119.86 | 45.06 |
| 942 | 15 | 134.31 | 110.95 | 23.36 |
| 1257.6 | 20 | 117.91 | 95.61 | 22.30 |
| 1570 | 25 | 99.93 | 80.85 | 18.08 |
| 1884 | 30 | 84.60 | 73.90 | 11.7 |
Adopt quenching technical as can be known from the above table, when cooling initial, shell ring cooling slowly, and the effect due to steam blanket makes surface temperature change between 62.8-314s little.Extend in time, steam blanket breaks gradually and the violent agitation heat exchange of water makes shell ring surface temperature sharply decline.Maximum temperature difference is 45.06 DEG C, and inhomogeneous cooling is even.
Table 1 and table 2 data are carried out contrast can find out, the spray cooling device that the present invention proposes effectively can carry out Homogeneous cooling to shell ring, and the cycle that is simple to operate, that greatly reduce shell ring production.
Embodiment two
On the basis of example one method 1, by changing quantity and the length of cooling water pipe, make the angle in spraying cooling arc and the shell ring center of circle be 50 degree, all the other conditions remain unchanged.Get A point and B point on the inside and outside surface of shell ring, variation tendency is as shown in table 3 in time to analyze its temperature.
Table 3 shell ring surfaces externally and internally node temperature variation tendency in time
| Time/s | The number of turns/q | Outer surface/DEG C | Inner surface/DEG C | The temperature difference/DEG C |
| 62.8 | 1 | 141.02 | 130.28 | 10.74 |
| 314 | 5 | 123.26 | 114.74 | 8.52 |
| 628 | 10 | 111.3 | 102.29 | 8.01 |
| 942 | 15 | 101.92 | 94.49 | 7.43 |
| 1257.6 | 20 | 90.65 | 83.39 | 7.26 |
| 1570 | 25 | 82.29 | 75.72 | 6.57 |
| 1884 | 30 | 75.38 | 68.17 | 6.21 |
As can be known from the above table, shell ring surfaces externally and internally temperature changing trend is identical with table 1, illustrates that this device can cool the shell ring of different size.Contrast known by table 2 and table 3, this spray cooling device has the advantage such as good cooling results, uniform spraying, is a kind of simple, spray cooling device that cooling effectiveness is high.
Claims (3)
1. the spray cooling device after the large-scale shell ring hot rolling of a Parameter adjustable, comprise for the upper spraying cooling unit of cooling hot-rolled shell ring upper outer surface and the lower spraying cooling unit for cooling shell ring inner surface, it is characterized in that: upper spraying cooling unit is made up of upper collection plate and the upper spraying cooling pipe be uniformly distributed on upper collection plate, lower spraying cooling unit is made up of next part plate and the lower spraying cooling pipe be uniformly distributed on next part plate, on, lower spraying cooling pipe is interconnected to constitute by spray base tube and spray pipe box, quantity>=1 of the spray base tube that every root spraying cooling pipe comprises, quantity>=0 of the spray pipe box comprised, on upper spraying cooling unit, the line of all upper spraying cooling pipe pipe ends forms the cambered surface of the indent that is coincide with cooled hot rolling shell ring upper surface, and on lower spraying cooling unit, the line of all lower spraying cooling pipe pipe ends forms the cambered surface of the evagination that is coincide with cooled hot rolling shell ring lower surface, if the length h of the upper spraying cooling pipe of upper collection plate center
1as benchmark, in the cambered surface that upper spraying cooling pipe pipe end is formed, the length of the upper spraying cooling pipe that arcuate positions is corresponding is arbitrarily:
H＝h
1+h
2
Wherein: h
1for the length of the upper spraying cooling pipe of upper collection plate center, h
2for the upper spraying cooling pipe comparatively benchmark h calculated
1the length increased, R is arc radius, and 2 θ are central angle, the chord length of L corresponding to the spraying cooling tube end of calculating;
In the cambered surface that lower spraying cooling pipe pipe end is formed, the length of the lower spraying cooling pipe that radian is corresponding is arbitrarily:
H
1＝h
3-h
4＝θ×L
Wherein: h
3for the length of the lower spraying cooling pipe of next part plate center, be set to benchmark, h
4for the lower spraying cooling pipe comparatively benchmark h calculated
3the length reduced.
2. the spray cooling device after the large-scale shell ring hot rolling of Parameter adjustable according to claim 1, is characterized in that: upper and lower collection plate is evenly distributed with threaded apertures, and all there is external screw thread at the two ends of spray base tube, and all there is internal thread at spray pipe box two ends; The length of the upper and lower spraying cooling pipe on upper and lower spraying cooling unit can regulate, its regulative mode is: two ends are placed in Ji Banshang with externally threaded spray base tube one end, and be threaded connection, the other end connects spray pipe box, spray pipe box is second connection spray base tube again, regulates spraying cooling pipe or lower spraying cooling pipe total length on every root according to this.
3. the spray cooling device after the large-scale shell ring hot rolling of Parameter adjustable according to claim 1, it is characterized in that: spray collection plate can move up and down with shell ring inner and outer diameter size, by regulating distance, the up and down quantity of spraying cooling water pipe and the length of cooling tube of spray collection plate and large-scale shell ring, form different cooling arcs, realize the roller repairing of different size shell ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310027210.5A CN103084421B (en) | 2013-01-25 | 2013-01-25 | Spray cooling device after a kind of large-scale shell ring hot rolling of Parameter adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310027210.5A CN103084421B (en) | 2013-01-25 | 2013-01-25 | Spray cooling device after a kind of large-scale shell ring hot rolling of Parameter adjustable |
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| Publication Number | Publication Date |
|---|---|
| CN103084421A CN103084421A (en) | 2013-05-08 |
| CN103084421B true CN103084421B (en) | 2016-01-06 |
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| CN108118128A (en) * | 2018-02-01 | 2018-06-05 | 燕山大学 | A kind of spray cooling device of the adjustable combined large shell ring in position |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2871045Y (en) * | 2006-01-13 | 2007-02-21 | 东北大学 | Cooler for hot rolling production line of strip steel |
| CN102099130A (en) * | 2008-07-16 | 2011-06-15 | 杰富意钢铁株式会社 | Cooling facility and cooling method for hot steel plate |
| CN102266831A (en) * | 2011-07-08 | 2011-12-07 | 东北大学 | Cooling device capable of forming high-density jet stream and producing method thereof |
| CN102847732A (en) * | 2012-08-20 | 2013-01-02 | 燕山大学 | Hot rolling spray cooling method for large cylinder |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01178309A (en) * | 1987-12-29 | 1989-07-14 | Nippon Steel Corp | Device for cooling of hot rolled steel sheet |
| JP4452093B2 (en) * | 2004-02-24 | 2010-04-21 | 株式会社共立合金製作所 | Injection nozzle and injection method |
-
2013
- 2013-01-25 CN CN201310027210.5A patent/CN103084421B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2871045Y (en) * | 2006-01-13 | 2007-02-21 | 东北大学 | Cooler for hot rolling production line of strip steel |
| CN102099130A (en) * | 2008-07-16 | 2011-06-15 | 杰富意钢铁株式会社 | Cooling facility and cooling method for hot steel plate |
| CN102266831A (en) * | 2011-07-08 | 2011-12-07 | 东北大学 | Cooling device capable of forming high-density jet stream and producing method thereof |
| CN102847732A (en) * | 2012-08-20 | 2013-01-02 | 燕山大学 | Hot rolling spray cooling method for large cylinder |
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