CN208728645U - A kind of asymmetric taper fluid injection slot side mouth crystallizer - Google Patents

Abstract

The utility model discloses a kind of asymmetric taper fluid injection slot side mouth crystallizers, Upper vertical fluid injection slot is distributed in surrounding rotation in crystallizer side, upper level fluid injection slot, lower vertical fluid injection slot, lower horizontal fluid injection slot and a reversed sump pit, fluid injection slot external opening is big, inner opening is small tapered, the both sides wire clamp angle of four fluid injection slots is different, influence according to each fluid injection slot slotting position to metal casting liquid flowing velocity in crystallizer, fluid injection trough rim wire clamp angle distributing upper is slightly less than lower part, the advantage is that: when metal casting liquid outside fluid injection slot by flowing into, the difference of outside diameter can increase whole flow velocity in fluid injection slot, the difference at fluid injection trough rim wire clamp angle can uniformly up and down flow velocity, reduce the cooling gap generated due to gravity, obtain fine and closely woven crystalline structure, improve the Forming Quality of slab.

Description

A kind of asymmetric taper fluid injection slot side mouth crystallizer

Technical field

The utility model belongs to tubing production technology field, is a kind of asymmetric taper fluid injection slot side mouth crystallization Device.

Background technique

The metal continuous cast industry development in China is rapid, but due to the limitation of technology at this stage, product yield it is big but Quality is not still high, for the continuous-cast blank of common metal tube, even exist stomata, microstructure crystal grain is excessive, crystal grain not The problems such as uniform, these problems will have a direct impact on the processing quality of subsequent handling.Crystallizer is the direct mold of casting blank formation, The formation of slab internal porosity and the flowing velocity and uniformity of casting liquid in crystallizer are closely related, the position of crystallizer fluid injection slot Set, the structural parameters such as shape, size have great influence for the flowing solidification and heat transfer of internal casting liquid, finally will affect slab group Knit the growth of crystal grain, thus optimize mold structure parameter be improve continuous casting billet structure type, uniformity must be by approach.

Summary of the invention

Against the above deficiency, the utility model proposes a kind of asymmetric taper fluid injection slot side mouth crystallizers.

Utility model device include there are four the Upper vertical fluid injection slot of asymmetric distribution, upper level fluid injection slot, under The interior exterior notch diameter of the vertical fluid injection slot in portion, lower horizontal fluid injection slot and a reversed sump pit, single fluid injection slot is different, leads to The shape of the single fluid injection slot of optimization design is crossed to increase pressure when casting liquid stream enters crystallizer, and then increases casting flow velocity, refinement Organize field crystal grain；The sideline angle of four fluid injection slots of crystallizer is also different, by the side for reasonably adjusting four fluid injection slots Wire clamp angle, the casting flow velocity of top and the bottom in homogeneously crystallized device weaken the sinking gap that gravity generates, are finally reached raising group Knit an effect for crystal grain quality.

The Technology design of the utility model is as follows: there are four different Upper verticals to infuse around distribution for crystallizer lateral ring Liquid bath, upper level fluid injection slot, lower vertical fluid injection slot, lower horizontal fluid injection slot and a reversed sump pit, the one of fluid injection slot Side line is parallel with crystallizer inner ring tangent line, and two sides sideline is non-parallel but forms an angle, and interior exterior notch diameter is unequal, note Since outer groove bore is greater than inside groove bore when liquid, so that the pressure of the metal casting liquid entered from inner tank mouths increases, and then increase gold Belong to flowing velocity when casting liquid enters crystallizer, the increase of casting liquid flowing velocity is conducive to form high-intensitive turbulent flow in crystallizer Area simultaneously takes away a large amount of latent heat of solidifications, can effectively improve the heat exchange efficiency of solidification zone, reduces the solidification and crystallization time, inhibits column crystal Oriented growth, advantageously form small grains tissue.According to the relationship in the drainage direction and gravity direction of four fluid injection slots, four The sideline angle of a fluid injection slot is different.The drainage direction of Upper vertical fluid injection slot and gravity direction are almost the same, when fluid injection Since gravity can accelerate the flowing of upper metal casting liquid, so that top and the bottom form pressure difference, when metal casting liquid being caused to solidify The grain size of top and the bottom is uneven, and the drainage direction of upper level fluid injection slot forms an angle with gravity direction, lower horizontal The drainage direction of fluid injection slot also forms an angle with gravity direction, but flow to it is different, the drainage direction of lower vertical fluid injection slot with Gravity direction is opposite.Consider four fluid injection slots casting liquid drainage direction, by four sideline angles separately design for 3 °, 5 °, 8 °, 10 °, when integrally reinforcing metal casting liquid and entering in crystallizer while pressure, the casting of increase lower part is hydraulic strong emphatically, so that lower part It casts flow velocity and is greater than top flow velocity, make up casting liquid caused by gravity and sink, with even solidification tissue field grain size, refinement Grain structure improves crystal grain quality.

Technical solution usefulness provided by utility model device:

1, the interior exterior notch diameter of fluid injection slot is unequal in crystallizer, increases pressure when metal casting liquid enters crystallizer, And then increasing casting flow velocity, tissue field crystal grain when refinement solidifies improves crystal grain quality.

2, the sideline angle of four fluid injection slots is different, when metal casting liquid being made to enter crystallizer from fluid injection slot, lower part casting It is hydraulic powerful hydraulic strong in top casting, sunk with reducing casting liquid caused by gravity, field grain size is organized in uniform top and the bottom.

Detailed description of the invention

Utility model device is further illustrated with reference to the accompanying drawings and examples.

Fig. 1 is a preferred cross-sections view of utility model device；

Fig. 2 is a preferred embodiment view of utility model device；

1 in figure, Upper vertical fluid injection slot；2, reversed sump pit；3, upper level fluid injection slot；4, lower vertical fluid injection slot； 5, lower horizontal fluid injection slot.

Specific embodiment

Crystallizer lateral ring around distribution there are four different Upper vertical fluid injection slot 1, upper level fluid injection slot 3, under The vertical fluid injection slot 4 in portion, lower horizontal fluid injection slot 5 and a reversed sump pit 2, side sideline and the crystallizer inner ring of fluid injection slot are cut Line is parallel, and two sides sideline is non-parallel but forms an angle, and interior exterior notch diameter is unequal, since outer groove bore is greater than when fluid injection Inside groove bore so that the pressure of the metal casting liquid entered from inner tank mouths increases, and then increases when metal casting liquid enters crystallizer Flowing velocity, the increase for casting liquid flowing velocity are conducive to form high-intensitive turbulent region in crystallizer and take away a large amount of solidifications to dive Heat can effectively improve the heat exchange efficiency of solidification zone, reduces the solidification and crystallization time, inhibits the oriented growth of column crystal, be conducive to Form small grains tissue.According to the relationship in the drainage direction and gravity direction of four fluid injection slots, the sideline folder of four fluid injection slots Angle is different.The drainage direction of Upper vertical fluid injection slot 1 and gravity direction are almost the same, since gravity can add when fluid injection The flowing of fast upper metal casting liquid, so that top and the bottom form pressure difference, the grain size of top and the bottom when metal casting liquid being caused to solidify Unevenly, the drainage direction of upper level fluid injection slot 3 forms an angle with gravity direction, the drainage side of lower horizontal fluid injection slot 5 It also forms an angle to gravity direction, but flows to difference, the drainage direction of lower vertical fluid injection slot 4 is opposite with gravity direction. The casting liquid drainage direction for considering four fluid injection slots, four sideline angles is separately designed as 3 °, 5 °, 8 °, 10 °, in whole reinforcement When metal casting liquid enters in crystallizer while pressure, it is hydraulic strong to increase lower part casting emphatically, so that lower part casting flow velocity is greater than upper Portion's flow velocity makes up casting liquid caused by gravity and sinks, with even solidification tissue field grain size, refines grain structure, improve Crystal grain quality.

Claims (3)

1. a kind of asymmetric taper fluid injection slot side mouth crystallizer, main includes Upper vertical fluid injection of the lateral ring around distribution Slot, upper level fluid injection slot, lower horizontal fluid injection slot, lower vertical fluid injection slot and a reversed sump pit, it is characterised in that: institute State the Upper vertical fluid injection slot of crystallizer side, the upper level fluid injection slot, the lower horizontal fluid injection slot, it is described under Exterior notch diameter is not identical in the vertical fluid injection slot in portion, and single fluid injection slot side sideline is parallel with the crystallizer inner ring tangent line, two sides Sideline is non-parallel but forms an angle, and the sideline angle of four fluid injection slots drains direction and gravity direction relationship respectively not according to it It is identical.

2. a kind of asymmetric taper fluid injection slot side mouth crystallizer according to claim 1, it is characterised in that: described The sideline of Upper vertical fluid injection slot, the upper level fluid injection slot, the lower horizontal fluid injection slot, the lower vertical fluid injection slot Not parallel at cone cell with axis, inside groove bore is less than outer groove bore.

3. a kind of asymmetric taper fluid injection slot side mouth crystallizer according to claim 1, it is characterised in that: described The two sides of Upper vertical fluid injection slot, the upper level fluid injection slot, the lower horizontal fluid injection slot, the lower vertical fluid injection slot Sideline angle drains direction according to it and gravity direction angle is ascending is designed as 3 °, 5 °, 8 °, 10 °.