CN208644031U - A kind of efficient cooling type twin-roll thin strip chill roll - Google Patents

Abstract

The utility model provides a kind of efficient cooling type twin-roll thin strip chill roll, belong to metallurgical casting equipment field, including the roller set in hollow shape and the central spindle for being sheathed in roller set and being interference fitted therewith, multiple axial limbers are offered on the circumferencial direction of roller set, a current limliting bar is provided in the limbers, the current limliting bar is equipped at least one for upsetting the abrupt change of cross-section structure of cooling water fluidised form on its length extending direction.The utility model on limbers by being inserted into a current limliting bar, and by processing abrupt change of cross-section structure on current limliting bar, make the surface roughening of current limliting bar, to enhance the tubulence energy of cooling water, reduce or eliminate the boundary-layer of cooling water and limbers, to improve heat transfer efficiency, reduces the incrusted probability in limbers, extend the service life of chill roll.

Description

A kind of efficient cooling type twin-roll thin strip chill roll

Technical field

The utility model belongs to metallurgical casting equipment technology field, and it is cold to be specifically related to a kind of efficient cooling type twin-roll thin strip But roller.

Background technique

Double roll strip casting roll process as crystallizer, makes liquid metal when extremely short using the casting roll of a pair of of relative rotation Interior solidification and thermoforming, are directly becoming metal sheet band.It eliminates continuous casting (ingot casting), roughing, hot continuous rolling and relevant heating, cut Two processes of Sub realizable fuzzy matrix technology and thermo forming are combined into one, are greatly shortened by a series of first-class normal process steps The technological process of production of steel material.The advantages that 50% or more energy saving, saving equipment investment about 70%.As shown in Figure 1, its Crossing technique journey is molten metal (4) in tundish (1), is flowed in current distribution device (3) by the mouth of a river (2), uniform by current distribution device (3) The ingredient and temperature of molten metal (4), have then flowed into crystallizer.Document THEPROCESS–RECENT DEVELOPMENTS AT NUCOR STEEL ' S COMMERCIALSTRIPCASTING PLANT reports Niu Ke steel mill The product pulling rate that CASTRIP production section is (0.76mm-1.8mm) × 1345mm can reach 80m/min, reach as high as 120mm/ min。

Why such energy-saving and environmental protection and efficient technique, be not carried out a wide range of industrialization, the main reason is that due to Still there are many critical technical problems to be left to be desired at present.Wherein Billet efficiency is one of problem.As described above The CASTRIP producing line of Niu Ke steel mill, pulling rate is between 80m/min~120m/min, residence time of the molten metal in crystallizer Only 0.4s-0.6s, needs molten metal quickly to solidify at the so short time, also just imitates to the heat transfer of the chill roll of crystallizer (5) More stringent requirements are proposed for rate.

Currently, the limbers of chill roll is the channel of inner wall smooth, tubulence energy very little when cooling water passes through the channel, Wall surface forms boundary-layer, hinders the heat exchange of cooling water and wall surface, reduces heat transfer efficiency.Additionally, due in water flowing wall surface of the hole Boundary-layer is formed, causes water flowing wall surface of the hole to be easy to form scale, further reduced heat transfer efficiency, reduce cooling at the same time The shelf life of roller.

Utility model content

In view of the foregoing deficiencies of prior art, the purpose of this utility model is to provide a kind of efficient cooling type double rollers Strip chill roll can enhance the tubulence energy of cooling water, reduce or eliminate the boundary-layer between cooling water and water flowing wall surface of the hole, improve Heat transfer efficiency reduces the probability that scale is formed in limbers, extends the service life of chill roll at the same time.

In order to achieve the above objectives, the utility model is achieved through the following technical solutions:

A kind of efficient cooling type twin-roll thin strip chill roll provided by the utility model, the chill roll include in hollow shape Roller covers and is sheathed on the central spindle being interference fitted in roller set and therewith, offers multiple axial directions on the circumferencial direction of roller set Limbers, a current limliting bar is provided in the limbers, the current limliting bar is equipped at least one on its length extending direction For upsetting the abrupt change of cross-section structure of cooling water fluidised form.

Further, the abrupt change of cross-section structure is hierarchic structure, rouses one of male structure or sunk structure or a variety of groups It closes.

Further, the hierarchic structure is equipped with the multistage annular step towards the limbers inner wall protrusion, and multistage The cross-sectional area of circular step is identical or successively decreases step by step.

Further, the current limliting bar outer wall between adjacent two-stage circular step is in and is horizontally or diagonally arranged.

Further, the bulging male structure is equipped with the protrusion towards the limbers inner wall protrusion, and the protrusion is One of spherical surface, polyhedron, helix, nicking or horizontal stripe or multiple combinations.

Further, the sunk structure is equipped with the concave part towards the limbers inner wall depression, and the concave part is One of spherical surface, polyhedron, helix, nicking or horizontal stripe or multiple combinations.

Further, the spherical surface is hemisphere face, radius 1mm-5mm.

Further, the polyhedron is regular polygon.

Further, the helical angle of the helix is 2 °~10 °.

Further, the spacing of the vertical moulding of the nicking is 1mm~5mm；The horizontal line stripe pitch of the horizontal stripe is 2mm ~30mm.

The beneficial effects of the utility model are: the utility model and is passed through by being inserted into a current limliting bar on limbers Abrupt change of cross-section structure is processed on current limliting bar to improve the turbulence intensity of cooling water to increase its rough surface, reduce or eliminate Boundary-layer between cooling water and limbers, improves cooling efficiency；Washing away between cooling water and water flowing wall surface of the hole is enhanced, is subtracted Lack the probability for forming scale, improves the service life of chill roll.

Other advantages, target and feature of the utility model will be explained in the following description to a certain extent It states, and to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, or Person can be instructed from the practice of the utility model.The target of the utility model and other advantages can be said by following Bright book is achieved and obtained.

Detailed description of the invention

It is practical to this below in conjunction with attached drawing in order to keep the purpose of this utility model, technical solution and advantage clearer It is novel to be described in further detail, in which:

Fig. 1 is twin-roll thin strip schematic diagram；

Fig. 2 is chill roll schematic three dimensional views；

Fig. 3 is the chill roll section schematic three dimensional views equipped with current limliting bar；

Fig. 4 is the chill roll sectional view equipped with current limliting bar；

Fig. 5 is limited flow post surface with circular step embodiment 1；

Fig. 6 is limited flow post surface with spherical surface concave part or protrusion embodiment 2；

Fig. 7 is limited flow post surface with polyhedron concave part or protrusion embodiment 3；

Fig. 8 is limited flow post surface with spiral groove portion or protrusion embodiment 4；

Fig. 9 is limited flow post surface with vertical bar concave part or protrusion embodiment 5；

Figure 10 current limliting bar surface band horizontal stripe concave part or protrusion embodiment 6；

The label in accompanying drawing is: 1- tundish；The mouth of a river 2-；3- current distribution device；4- molten metal；5- chill roll；6- axle sleeve；7- axis Core；The limbers 8-；9- current limliting bar.

Specific embodiment

Illustrate the embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this theory Content disclosed by bright book understands other advantages and effect of the utility model easily.The utility model can also be by addition Different specific embodiments are embodied or practiced, and the various details in this specification can also be based on different viewpoints and answer With carrying out various modifications or alterations under the spirit without departing from the utility model.It should be noted that institute in following embodiment The diagram of offer only illustrates the basic conception of the utility model in a schematic way, in the absence of conflict, following embodiment and Feature in embodiment can be combined with each other.

As shown in Figs 1-4, a kind of efficient cooling type twin-roll thin strip chill roll, the chill roll 5 include the roller in hollow shape Set 6 covers the central spindle 7 being interference fitted in 6 and therewith with the roller is sheathed on, and offers multiple axis on the circumferencial direction of roller set 6 To limbers 8, a current limliting bar 9 is provided in the limbers 8, the current limliting bar 9 is equipped with extremely on its length extending direction Few one for upsetting the abrupt change of cross-section structure of cooling water fluidised form in the limbers.Using the above scheme, the utility model passes through It is inserted into a current limliting bar on limbers, and is mentioned by processing abrupt change of cross-section structure on current limliting bar with increasing its rough surface The high turbulence intensity of cooling water, has reduced or eliminated the boundary-layer between cooling water and limbers, has improved cooling efficiency；Enhancing Washing away between cooling water and water flowing wall surface of the hole, reduces the probability to form scale, improves the service life of chill roll.

Above-mentioned abrupt change of cross-section structure is using hierarchic structure, drum one of male structure or sunk structure or multiple combinations. In this way, shaggy current limliting bar enhances the turbulence intensity of water flow, heat transfer effect is enhanced.

Embodiment 1:

As shown in figure 5, the abrupt change of cross-section structure uses hierarchic structure, which is provided with convex towards 8 inner wall of limbers The multistage annular step risen, and multistage annular step cross-sectional area is identical or the cross-sectional area of multistage annular step Successively decrease step by step, to form pagoda type.Preferably, the current limliting bar outer wall between adjacent two-stage circular step is in and horizontally or diagonally sets It sets.

Embodiment 2:

As shown in fig. 6, difference from Example 1 is the abrupt change of cross-section structure using drum male structure or recess knot Structure, which is provided with protrusion or concave part towards 8 inner wall of the limbers protrusion, and the protrusion or concave part use ball Face, the spherical surface are hemisphere face, radius 1mm-5mm.Certainly in various embodiments, which is also possible to ellipsoid Face.The current limliting bar of above scheme, the turbulence intensity for improving cooling water also increase, and improve the heat transfer efficiency of chill roll.

Embodiment 3:

As shown in fig. 7, difference from Example 2 is the protrusion or concave part using polyhedron, the multi-panel Body is regular polygon, such as positive tetrahedron, regular hexahedron.The current limliting bar of above scheme, improves the turbulence intensity of cooling water It increases, improves the heat transfer efficiency of chill roll.

Embodiment 4:

As shown in figure 8, difference from Example 2 is the protrusion or concave part using helix, i.e. current limliting bar Surface processes spiral-shaped, and spiral groove portion or protrusion depth or height are 5mm, and helical angle is 5 °.The table of above scheme The coarse current limliting bar in face, enhances the turbulence intensity of cooling water, has reduced or eliminated the boundary-layer of cooling water, improves heat transfer effect Rate reduces the probability of fouling, extends the service life of roller set.

Embodiment 5:

As shown in figure 9, difference from Example 2 is that the protrusion or concave part use nicking, nicking The width of vertical moulding is 2mm, spacing 2mm；The current limliting bar of above scheme, the turbulence intensity for improving cooling water are also mentioned Height improves the heat transfer efficiency of chill roll.

Embodiment 6:

As shown in Figure 10, difference from Example 2 is that the protrusion or concave part use horizontal stripe, horizontal stripe The width of ledgement is 2mm, spacing 10mm；The current limliting bar of above scheme, the turbulence intensity for improving cooling water are also mentioned Height improves the heat transfer efficiency of chill roll.

Finally, it is stated that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng The utility model is described in detail according to preferred embodiment, those skilled in the art should understand that, it can be to this The technical solution of utility model is modified or replaced equivalently, should all without departing from the objective and range of the technical program Cover in the scope of the claims of the utility model.

Claims (10)

1. a kind of efficient cooling type twin-roll thin strip chill roll, the chill roll (5) includes the roller set (6) in hollow shape and is sheathed on The central spindle (7) being interference fitted in roller set and therewith, offers multiple axial limbers on the circumferencial direction of roller set (8), which is characterized in that a current limliting bar (9) is provided in the limbers, the current limliting bar is equipped on its length extending direction At least one is for upsetting the abrupt change of cross-section structure of cooling water fluidised form.

2. efficient cooling type twin-roll thin strip chill roll according to claim 1, which is characterized in that the abrupt change of cross-section structure For hierarchic structure, drum one of male structure or sunk structure or multiple combinations.

3. efficient cooling type twin-roll thin strip chill roll according to claim 2, which is characterized in that set in the hierarchic structure There is a multistage annular step towards the limbers inner wall protrusion, and the cross-sectional area of multistage annular step is identical or pass step by step Subtract.

4. efficient cooling type twin-roll thin strip chill roll according to claim 3, which is characterized in that adjacent two-stage ring-type platform Current limliting bar outer wall between rank is in horizontally or diagonally to be arranged.

5. efficient cooling type twin-roll thin strip chill roll according to claim 2, which is characterized in that set in the bulging male structure There is the protrusion towards the limbers inner wall protrusion, the protrusion is spherical surface, polyhedron, helix, nicking or horizontal stripe One of line or multiple combinations.

6. efficient cooling type twin-roll thin strip chill roll according to claim 2, which is characterized in that set on the sunk structure There is the concave part towards the limbers inner wall depression, the concave part is spherical surface, polyhedron, helix, nicking or horizontal stripe One of line or multiple combinations.

7. efficient cooling type twin-roll thin strip chill roll according to claim 5 or 6, which is characterized in that the spherical surface is half Spherical surface, radius 1mm-5mm.

8. efficient cooling type twin-roll thin strip chill roll according to claim 5 or 6, which is characterized in that the polyhedron is Regular polygon.

9. efficient cooling type twin-roll thin strip chill roll according to claim 5 or 6, which is characterized in that the helix Helical angle is 2 °~10 °.

10. efficient cooling type twin-roll thin strip chill roll according to claim 5 or 6, which is characterized in that the nicking The spacing of vertical moulding is 1mm~5mm；The horizontal line stripe pitch of the horizontal stripe is 2mm~30mm.