CN202028622U - Adjustable reversible type four-roller mill high-pressure water descaling device - Google Patents
Adjustable reversible type four-roller mill high-pressure water descaling device Download PDFInfo
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- CN202028622U CN202028622U CN2011200038000U CN201120003800U CN202028622U CN 202028622 U CN202028622 U CN 202028622U CN 2011200038000 U CN2011200038000 U CN 2011200038000U CN 201120003800 U CN201120003800 U CN 201120003800U CN 202028622 U CN202028622 U CN 202028622U
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- pressure water
- descaling device
- water descaling
- roller mill
- steel plate
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Abstract
The utility model discloses an adjustable reversible type four-roller mill high-pressure water descaling device which comprises a carriage, a water baffle and a collector pipe; the collector pipe is fixed on the carriage; the carriage is movably connected with an equalizing beam of a mill; and a pin hole seat of the water baffle is compounded by two halves. The adjustable reversible type four-roller mill high-pressure water descaling device can guarantee the distance from a nozzle to the surface of a steel plate to be relatively constant, and has large water jet capacity and good descaling effect.
Description
Technical field
The utility model belongs to field of metallurgy, relates to a kind of reversing four-high mill, specifically a kind of adjustable reversing four-high mill high pressure water descaling device.
Background technology
Nangang's mainly production Ship Structure of medium plate mill steel plate, carbon structural steel plate, low-alloy high-tensile structural steel plate, steel heavy plate for pressure vessels, boiler plate, quality carbon structural steel, structural steel for bridge plate etc.The technological process of production is as follows:
Continuous casting billet → add stove stove → high-pressure water descaling (remove stove and give birth to iron scale) → four-high rougher (de-scaling of secondary oxidation iron sheet) → finishing mill (de-scaling of secondary oxidation iron sheet) → laminar flow cooling → finishing.
The generation reason of iron scale is as follows:
When steel billet heated at heating furnace, the upper strata iron scale adhesion of generation was lower, and its composition mainly is Fe3O4, Fe2O3.Fe3O4, Fe2O3 are in the continuous conversion process, and growth pressure that oxide is different and large-area growth form the squeezing action between oxide layer, have caused the generation of pore and crackle structure, and this upper strata iron scale is easy to remove.
The influence of alloying element is: meetings such as Cr, Al, Si, W form protective layer and have slowed down the speed that oxide skin generates, and easily form mottled viscosity oxide, not easy-clear.Meetings such as Cu, Ni are reduced from oxide layer by iron, so can not reduce the formation of oxide skin, easily form the viscosity oxide, not easy-clear.Therefore Mn can help the formation of oxide skin than the easier oxidation of Fe, helps to form loose oxide, removes easily.
In the steel plate rolling process,, be viscosity oxide skin, not easy-clear when steel billet temperature is very strong about 800 ° of FeO adhesions that form more than the C greatly.
High-pressure water descaling is a kind of hydraulic pressure machinery scale breading process, and high pressure water descaling device comprises water fender and collector pipe, and collector pipe is connected with nozzle.Utilize the heat shock of the different thermal contractions generations of slab matrix and iron sheet, add the hitting power that descaling jet produces, the acting in conjunction of the two once or the secondary oxidation iron sheet remove from surface of steel plate, the quality of scale removal effect directly has influence on the surface quality of finished product steel plate and the wearing and tearing of roll, the factor that influences scale removal effect is very complicated again, with the character and the size of height, angle, pressure and the iron scale of nozzle relation is arranged all.
Influence the principal element of hitting power, qualitative analysis sees Table 1.
As can be seen from Table 1, the factor that influences scale removal effect is a lot of and complicated, and it is very difficult accurately providing the scale removal effect value quantitatively, therefore can only provide the empirical value of a relative quantification, and the quantitative expression of scale removal effect has adopted hitting power to be quantized.What hitting power was had the greatest impact is jetting height, is approximated to quadratic relationship.
Carbon structural steel panel products surface quality generally can satisfy customer requirement; But the surface of thick specification and steel alloy product often has iron scale to be pressed into problem, and small part needs subsequent treatment just can consign to the client, but has wasted a large amount of manpower and materials, and major part have to be done and change the original sentence to processing, has caused loss.
Pitted skin appears in surface of steel plate, reason is many-sided, but a wherein important influence factor is exactly that the high-pressure water descaling hitting power is not enough, fail to remove clean surface of steel plate iron scale, cause iron scale to be pressed into surface of steel plate in the steel plate rolling process, particularly the removing of steel alloy and secondary oxidation iron sheet needs higher hitting power.Thick before transforming, finishing mill installation dimension and relevant parameter see Table 2.
The problem that this high-pressure water descaling mode exists and being analyzed as follows:
(1) top nozzle is excessive apart from the surface of steel plate distance, and constantly changes.Along with the variation in the roller of upper support roller, top working roll footpath, nozzle changes to 440 apart from the distance of surface of steel plate from 290, and is huge to the hitting power influence.
(2) upper header nozzle number is on the low side, and skewness.15 of the former design nozzle of upper header numbers, injector spacing is 155,160,170 3 kind of specification, can cover in order to ensure the full plate face of steel plate, because former design upper header nozzle has only 15, and skewness, the distance between each nozzle is bigger, caused jet angle excessive, the big more hitting power of jet angle is more little.Simultaneously because water fender pin-and-hole seat size is bigger, can't accomplish the even distribution of injector spacing when 110 left and right sides by former figure.
(3) the upper header caliber is less than normal, and current are turbulent condition in the former 159*25 that is designed to, collector, have reduced hitting power.
Therefore, high-pressure water descaling system is removed the secondary oxidation iron sheet mainly at thick finishing mill at present, and generally about 800 degree, the iron scale of formation is easy-clear not for the rolling temperature of finishing mill.
Summary of the invention
In order to overcome the problem that prior art exists, the purpose of this utility model provides a kind of adjustable reversing four-high mill high pressure water descaling device, and this device can keep nozzle constant relatively apart from the surface of steel plate distance, and injection flow rate is big, and scale removal effect is good.
The purpose of this utility model is achieved through the following technical solutions:
A kind of adjustable reversing four-high mill high pressure water descaling device comprises balladeur train, water fender and collector pipe, and it is characterized in that: collector pipe is fixed on the balladeur train, and balladeur train connects for movable with the mill balancing beam.
The pin-and-hole seat of water fender described in the utility model is semi-synthetic by two.
The utility model changes the connecting mode of balladeur train and balance, is connected by original steady pin, changes movable the connection into.Because upper header is fixed on the balladeur train and motion of balladeur train, according to the variation in backing roll, working roll roller footpath, each change backing roll after, adjust the position of balladeur train by the plus-minus pad, to reach nozzle constant relatively apart from the surface of steel plate distance.
The utility model is arranged uneven and quantity problem on the low side for solving nozzle on water fender.Reduce the steel plate thickness between the Kong Yukong on the water fender, be reduced to 30mm by original 70mm.In order to accomplish injector spacing about 110mm, for this improves water fender pin-and-hole seat, be divided into two by an original integral body, make two halves into, solved problem of uneven distribution.
The utility model can keep nozzle constant relatively apart from the surface of steel plate distance, nozzle on water fender, arrange evenly and quantity many, injection flow rate is big, scale removal effect is good.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that B partly is the draw bail schematic diagram of balladeur train and mill balancing beam among the utility model Fig. 1;
Fig. 3 is the pin-and-hole holder structure schematic diagram of water fender in the utility model.
The specific embodiment
A kind of adjustable reversing four-high mill high pressure water descaling device is seen Fig. 1, and this device comprises balladeur train 1, water fender 2 and collector pipe 3, and collector pipe 3 is fixed on the balladeur train 1, and balladeur train 1 connects for movable with mill balancing beam 4.The pin-and-hole seat of water fender 2 is semi-synthetic by two.Among Fig. 1, A is the roll line absolute altitude.The 6th, working roll, the 7th, backing roll.
Because upper header is fixed on the balladeur train, with motion of balladeur train, variation according to backing roll, working roll roller footpath, behind each replacing backing roll, adjust the position of balladeur train by the plus-minus pad, reaching nozzle constant relatively apart from the surface of steel plate distance, Fig. 2 is the draw bail schematic diagram of balladeur train and mill balancing beam in the utility model.But C is an adjustment region among Fig. 2.
On water fender, arrange uneven and quantity problem on the low side for solving nozzle 5, reduce the steel plate thickness between the Kong Yukong on the water fender, be reduced to 30mm by original 70mm.In order to accomplish injector spacing about 110mm, water fender pin-and-hole seat is improved, be divided into two by an original integral body, make two halves into, solved problem of uneven distribution.Fig. 3 is the pin-and-hole holder structure schematic diagram of water fender in the utility model.Again make collector, increase the upper header caliber, be increased to 219*32 by original 194*25.
Implement the back scale removal effect
By the test board test as can be seen, striking distance is uniform evenly, hits the degree of depth obviously (the originally no sharp trace of test), and theoretical calculating greater than 0.5N/mm2 satisfied technological requirement.
Claims (2)
1. adjustable reversing four-high mill high pressure water descaling device, comprise balladeur train (1), water fender (2) and collector pipe (3), it is characterized in that: collector pipe (3) is fixed on the balladeur train (1), and balladeur train (1) connects for movable with mill balancing beam (4).
2. adjustable reversing four-high mill high pressure water descaling device according to claim 1 is characterized in that: the pin-and-hole seat of described water fender (2) is semi-synthetic by two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200038000U CN202028622U (en) | 2011-01-07 | 2011-01-07 | Adjustable reversible type four-roller mill high-pressure water descaling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200038000U CN202028622U (en) | 2011-01-07 | 2011-01-07 | Adjustable reversible type four-roller mill high-pressure water descaling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202028622U true CN202028622U (en) | 2011-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200038000U Expired - Fee Related CN202028622U (en) | 2011-01-07 | 2011-01-07 | Adjustable reversible type four-roller mill high-pressure water descaling device |
Country Status (1)
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| CN (1) | CN202028622U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104324945A (en) * | 2014-11-03 | 2015-02-04 | 番禺珠江钢管（连云港）有限公司 | Descaling guide device for hot continuous rolling machining applicable to wide strip steel |
| US10449584B2 (en) | 2013-05-30 | 2019-10-22 | Primetals Technologies Austria GmbH | Adjustable descaler |
| CN113198857A (en) * | 2021-04-14 | 2021-08-03 | 首钢集团有限公司 | Method for improving quality consistency of upper surface and lower surface of strip steel |
-
2011
- 2011-01-07 CN CN2011200038000U patent/CN202028622U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10449584B2 (en) | 2013-05-30 | 2019-10-22 | Primetals Technologies Austria GmbH | Adjustable descaler |
| CN104324945A (en) * | 2014-11-03 | 2015-02-04 | 番禺珠江钢管（连云港）有限公司 | Descaling guide device for hot continuous rolling machining applicable to wide strip steel |
| CN104324945B (en) * | 2014-11-03 | 2017-02-15 | 番禺珠江钢管（连云港）有限公司 | Descaling guide device for hot continuous rolling machining applicable to wide strip steel |
| CN113198857A (en) * | 2021-04-14 | 2021-08-03 | 首钢集团有限公司 | Method for improving quality consistency of upper surface and lower surface of strip steel |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111109 Termination date: 20200107 |