CN204486488U - A kind of effective high pressure descaling case baffle device for water improving steel edge portion quality - Google Patents

Abstract

The utility model discloses a kind of effective high pressure descaling case baffle device for water improving steel edge portion quality, comprise: de-scaling case lid, the dash chain curtain be made up of some chains is installed with in the middle part of described de-scaling case lid, the two ends of described dash chain curtain are respectively provided with a liner plate, and the height of described liner plate is greater than the height of dash chain curtain.The beneficial effects of the utility model are mainly reflected in: effectively improve hot-strip quality of edges, improve hot-rolled product competitiveness.

Description

A kind of effective high pressure descaling case baffle device for water improving steel edge portion quality

Technical field

The utility model technology is applicable to continuous hot-rolling mill unit, is a kind of high pressure descaling case baffle device for water.Specifically, apply this technology and can effectively improve steel edge portion mass defect.

Background technology

As everyone knows, Wiring technology flow process is produced in hot rolling roughly that stove heating, roughing, finish rolling, layer are cold, coiling process.The technological process of roughing region is as follows: 210 ~ 250mm thickness continuous casting plate billet is heated to about 1200 DEG C through hot-rolling heating furnace, after the de-scaling of high-pressure water descaling case, enter roughing first frame rolling a time, five passages are rolled afterwards in roughing second frame, eventually pass each a time of roughing third and fourth frame, finally roll into the intermediate blank of thickness in 36 ~ 65mm scope, simultaneously according to band steel finished product different in width desired value, complete slab and subtract wide.

Wherein, high pressure descaling case is for removing the iron scale being attached to hot base upper and lower surface.De-scaling box position is installed on de-scaling roller-way, and inner both sides are equipped with liner plate.De-scaling case lid can be opened and carry out internal check operation.High pressure descaling case comprises two pairs of descaling headers, and the often pair of collector can separately also can inject high pressure water simultaneously.In order to reduce the water going out De-scaling box as far as possible, and prevent the interference between two pairs of collectors, De-scaling box is provided with baffle device for water at De-scaling box entrance and exit, existing baffle device for water as shown in Figure 1, de-scaling case lid 1 is arranged on directly over de-scaling roller-way 2, the dash chain curtain 3 be made up of some chains is installed in the middle part of de-scaling case lid 1, the two ends of dash chain curtain 3 are respectively provided with a liner plate 4, the height of liner plate 4 is identical with the height of dash chain curtain 3, and the length of each chain in dash chain curtain is also identical, this baffle device for water in use, find that steel edge portion exists edge black line shape mass defect sometimes, mainly be distributed in band steel both sides edge, degree varies, have a strong impact on hot-rolled product quality and competitiveness.

Because heating furnace extract out slab die misalignment time De-scaling box in dash iron chains extrude between slab and guide plate cause high temperature slab edge swipe be out of shape; in the follow-up operation of rolling, translate into belt steel surface due to side pressure cause edge fault; meanwhile, cause rolling line shutdown loss also larger for this Defect Search process.

Utility model content

The purpose of this utility model is to solve steel edge portion in prior art and sometimes there is edge black line shape mass defect, mainly be distributed in band steel both sides edge, degree varies, have a strong impact on the defect of hot-rolled product quality and competitiveness, provide a kind of effective high pressure descaling case baffle device for water improving steel edge portion quality to solve the problems referred to above.

To achieve these goals, the technical solution of the utility model is as follows:

A kind of effective high pressure descaling case baffle device for water improving steel edge portion quality, it comprises: de-scaling case lid, the dash chain curtain be made up of some chains is installed with in the middle part of described de-scaling case lid, the two ends of described dash chain curtain are respectively provided with a liner plate, the height of described liner plate is greater than the height of dash chain curtain, described dash chain curtain is divided into five regions, centre is mesozone dash chain curtain, the both sides of described mesozone dash chain curtain are two symmetrically arranged transition region dash chain curtains, the outside of described transition region dash chain curtain is edge district dash chain curtain, wherein, the chain length of mesozone dash chain curtain, the chain length of transition region dash chain curtain, the chain length of edge district dash chain curtain reduces successively.

Preferably, each chain length in the dash chain curtain of described mesozone is identical, and each chain length of described edge district dash chain curtain is identical, and each chain length of described transition region dash chain curtain shortens successively along the direction in edge district.

Preferably, the height H of described mesozone dash chain curtain _mand width W _mmeet following relational expression respectively:

$H_m=K_1\×\frac{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\mathrm{Ti}\×\mathrm{Ni}}{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\mathrm{Ni}}$

Wherein, H _m---mesozone chain curtain height, namely chain covers the distance naturally drooped from De-scaling box, and unit is mm;

Ti---continuous casting working procedure is cast different slab thickness, 0<i≤6;

Ni---continuous casting working procedure block number corresponding to different-thickness slab of casting;

K ₁---slab thickness empirical coefficient, 1.03≤K ₁≤ 1.10;

$W_m=K_2\&times;\frac{\underset{j=1}{\overset{n}{\mathrm{\&Sigma;}}}\mathrm{Wj}\&times;\mathrm{Nj}}{\underset{j=1}{\overset{n}{\mathrm{\&Sigma;}}}\mathrm{Nj}}$

Wherein W _m---mesozone chain curtain width, the distance namely from a chain of one end to another root chain of the other end, unit is mm;

Wj---continuous casting working procedure is cast different width of plate slab, 0<i≤15;

Nj---continuous casting working procedure block number corresponding to different-thickness slab of casting;

K ₂---width of plate slab empirical coefficient, 0.95<K ₂≤ 1.05.

Preferably, the height L of described edge district dash chain curtain ₁and width W ₁meet following relational expression respectively:

L ₁＝K ₃×T _m

Wherein, L ₁---edge district chain curtain height, namely chain covers the distance naturally drooped from De-scaling box, and unit is mm;

K ₃---empirical coefficient, 0.93<K ₃≤ 0.98;

T _m---continuous casting working procedure is cast maximum slab thickness;

W ₁＝K ₃×T _m

Wherein, W ₁---edge district chain curtain width, the distance namely from a chain of one end to another root chain of the other end, unit is mm;

K ₄---empirical coefficient, 0.93<K ₄≤ 0.98;

T _m---continuous casting working procedure is cast maximum width of plate slab;

Preferably, the chain of described transition region dash chain curtain is set to: in described transition region dash chain curtain, the shortest chain height is L ₁, the longest chain height is H _m.

Because heating furnace extract out slab die misalignment time De-scaling box in dash iron chains extrude between slab and guide plate cause high temperature slab edge swipe be out of shape; in the follow-up operation of rolling, translate into belt steel surface due to side pressure cause edge fault; meanwhile, cause rolling line shutdown loss also larger for this Defect Search process.

The beneficial effects of the utility model are mainly reflected in: pass through H _mthe mesozone dash chain curtain of height, can ensure overall dash effect; Adopt L ₁the edge district dash chain curtain of height, even if there is deflection when passing through De-scaling box in the slab that heating furnace is extracted out, but because this region chain length can not enter in slab corner and De-scaling box interior lining panel space, slab edge can be avoided to sustain damage and cause defect to occur; The arrangement that transition region dash chain curtain adopts chain length to successively decrease, ensure that corresponding chain can not enter in slab corner and De-scaling box interior lining panel space, and then also can avoid slab edge damaged, thus effectively improve hot-strip quality of edges, improve hot-rolled product competitiveness.

Accompanying drawing explanation

Fig. 1 is the structural representation of the high pressure descaling case baffle device for water of prior art;

Fig. 2 is the structural representation of high pressure descaling case baffle device for water of the present utility model;

Fig. 3 is the enlarged drawing of dash chain curtain in the utility model;

In figure: 1, de-scaling case lid; 2, de-scaling roller-way; 3, dash chain curtain; 31, middle region dash chain curtain; 32, transition region dash chain curtain; 33, edge district dash chain curtain; 4, liner plate.

Detailed description of the invention

A kind of effective structure improving the high pressure descaling case baffle device for water of steel edge portion quality that the utility model provides as shown in Figures 2 and 3, de-scaling case lid 1 is arranged on directly over de-scaling roller-way 2, the dash chain curtain 3 be made up of some chains is installed in the middle part of de-scaling case lid 1, the two ends of dash chain curtain 3 are respectively provided with a liner plate 4, and the height of liner plate 4 is greater than the height of dash chain curtain 3.

Wherein, dash chain curtain is divided into five regions, centre is mesozone dash chain curtain 31, the both sides of mesozone dash chain curtain 31 are two symmetrically arranged transition region dash chain curtains 32, the outside of transition region dash chain curtain 32 is edge district dash chain curtain 33, wherein, the chain length of mesozone dash chain curtain 31, the chain length of transition region dash chain curtain 32, the chain length of edge district dash chain curtain 33 reduce successively; Each chain length in mesozone dash chain curtain 31 is identical, each chain length of edge district dash chain curtain 33 is identical, and each chain length of transition region dash chain curtain 32 is along being shortened successively by the direction of middle region dash chain curtain 31 to edge district dash chain curtain 33.

The height H of mesozone dash chain curtain 31 _mand width W _mmeet following relational expression respectively:

$H_m=K_1\&times;\frac{\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\mathrm{Ti}\&times;\mathrm{Ni}}{\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\mathrm{Ni}}$

Wherein, H _m---mesozone chain curtain height, unit is mm;

Ti---continuous casting working procedure is cast different slab thickness, 0<i≤6;

Ni---continuous casting working procedure block number corresponding to different-thickness slab of casting;

K ₁---slab thickness empirical coefficient, 1.03≤K ₁≤ 1.10;

$W_m=K_2\&times;\frac{\underset{j=1}{\overset{n}{\mathrm{\&Sigma;}}}\mathrm{Wj}\&times;\mathrm{Nj}}{\underset{j=1}{\overset{n}{\mathrm{\&Sigma;}}}\mathrm{Nj}}$

Wherein W _m---mesozone chain curtain width, unit is mm;

Wj---continuous casting working procedure is cast different width of plate slab, 0<i≤15;

Nj---continuous casting working procedure block number corresponding to different-thickness slab of casting;

K ₂---width of plate slab empirical coefficient, 0.95<K ₂≤ 1.05.

The height L of edge district dash chain curtain 33 ₁and width W ₁meet following relational expression respectively:

L ₁＝K ₃×T _m

Wherein, L ₁---edge district chain curtain height, unit is mm;

K ₃---empirical coefficient, 0.93<K ₃≤ 0.98;

T _m---continuous casting working procedure is cast maximum slab thickness;

W ₁＝K ₃×T _m

Wherein, W ₁---edge district chain curtain width, unit is mm;

K ₄---empirical coefficient, 0.93<K ₄≤ 0.98;

T _m---continuous casting working procedure is cast maximum width of plate slab;

And the shortest chain height is L in transition region dash chain curtain 32 ₁, the longest chain height is H _m.

Because mesozone dash chain curtain 31 highly adopts H _mafter, overall dash effect can be ensured, and edge district dash chain curtain 33 adopts L ₁highly, even if the slab extracted out of heating furnace is by deflection occurring during De-scaling box, but can not enter in slab corner and De-scaling box interior lining panel space due to this region chain length, slab edge can be avoided to sustain damage and cause defect to occur; The arrangement that transition region dash chain curtain 32 adopts chain length to successively decrease, ensure that corresponding chain can not enter in slab corner and De-scaling box interior lining panel space, and then also can avoid slab edge damaged, thus effectively improve hot-strip quality of edges, improve hot-rolled product competitiveness.

In sum, be only preferred embodiment of the present utility model, not be used for limit the utility model implement scope, all equalizations of doing according to shape, structure, feature and the spirit described in the utility model right change and modify, and all should be included in right of the present utility model.

Claims (5)

1. one kind is effectively improved the high pressure descaling case baffle device for water of steel edge portion quality, it is characterized in that, comprise: de-scaling case lid, the dash chain curtain be made up of some chains is installed with in the middle part of described de-scaling case lid, the two ends of described dash chain curtain are respectively provided with a liner plate, the height of described liner plate is greater than the height of dash chain curtain, described dash chain curtain is divided into five regions, centre is mesozone dash chain curtain, the both sides of described mesozone dash chain curtain are two symmetrically arranged transition region dash chain curtains, the outside of described transition region dash chain curtain is edge district dash chain curtain, wherein, the chain length of mesozone dash chain curtain, the chain length of transition region dash chain curtain, the chain length of edge district dash chain curtain reduces successively.

2. high pressure descaling case baffle device for water as claimed in claim 1, it is characterized in that, each chain length in the dash chain curtain of described mesozone is identical, each chain length of described edge district dash chain curtain is identical, and each chain length of described transition region dash chain curtain shortens successively along the direction in edge district.

3. high pressure descaling case baffle device for water as claimed in claim 1 or 2, is characterized in that, the height H of described mesozone dash chain curtain _mand width W _mmeet following relational expression respectively:

Wherein, H _m---mesozone dash chain curtain height;

Ti---continuous casting working procedure is cast different slab thickness, 0<i≤6;

Ni---continuous casting working procedure block number corresponding to different-thickness slab of casting;

K ₁---slab thickness empirical coefficient, 1.03≤K ₁≤ 1.10;

Wherein W _m---mesozone dash chain curtain width;

Wj---continuous casting working procedure is cast different width of plate slab, 0<i≤15;

Nj---continuous casting working procedure block number corresponding to different-thickness slab of casting;

K ₂---width of plate slab empirical coefficient, 0.95<K ₂≤ 1.05.

4. high pressure descaling case baffle device for water as claimed in claim 3, is characterized in that, the height L of described edge district dash chain curtain ₁and width W ₁meet following relational expression respectively:

L ₁＝K ₃×T _m

Wherein, L ₁---edge district dash chain curtain height;

K ₃---empirical coefficient, 0.93<K ₃≤ 0.98;

T _m---continuous casting working procedure is cast maximum slab thickness;

W ₁＝K ₃×T _m

Wherein, W ₁---edge district dash chain curtain width;

K ₄---empirical coefficient, 0.93<K ₄≤ 0.98;

T _m---continuous casting working procedure is cast maximum width of plate slab.

5. high pressure descaling case baffle device for water as claimed in claim 4, it is characterized in that, the chain of described transition region dash chain curtain is set to: in described transition region dash chain curtain, the shortest chain height is L ₁, the longest chain height is H _m.