CN216656268U - Double-roller thin-strip continuous casting crystallizer - Google Patents
Double-roller thin-strip continuous casting crystallizer Download PDFInfo
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- CN216656268U CN216656268U CN202122932566.6U CN202122932566U CN216656268U CN 216656268 U CN216656268 U CN 216656268U CN 202122932566 U CN202122932566 U CN 202122932566U CN 216656268 U CN216656268 U CN 216656268U
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Abstract
The utility model belongs to the technical field of strip continuous casting, and particularly relates to a double-roller strip continuous casting crystallizer, which comprises a main body structure, a plurality of grooves and a plurality of rollers, wherein the inner wall of the main body structure comprises a roller sleeve and a roller core; the two ends of the roller core are respectively provided with a water inlet and a water outlet, the inner cavity of the roller core is divided into a water inlet cavity and a water outlet cavity by a partition plate, the water inlet cavity is communicated with the water inlet of the roller core, and the water outlet cavity is communicated with the water outlet of the roller core; a plurality of water outlet holes are formed in the roller wall on one side of the roller core water inlet cavity, and a plurality of water inlet holes corresponding to the water outlet holes are formed in the roller wall on one side of the roller core water outlet cavity; the whole inner cavity of the crystallizer can be used as a cooling water passage, so that the water passing amount of the crystallizer is increased, the cooling capacity of the crystallizer is improved, the thickness of a plate blank and the blank drawing speed are improved, and steel grades with different cooling requirements can be produced; the circumferential direction is cooled, the problem of uneven cooling in the axial direction is avoided, and the quality of the produced product can be improved.
Description
The technical field is as follows:
the utility model belongs to the technical field of strip continuous casting, and particularly relates to a double-roller strip continuous casting crystallizer.
Background art:
continuous casting of thin strip, a near net shape continuous casting iron-making technique, directly casts thin strip with thickness below 15mm, and directly cold rolls the thin strip into strip without hot rolling. There are 3 main methods for continuously casting thin strips: twin roll casting, roll belt casting and single roll casting. The typical production process of the twin-roll thin strip continuous casting technology comprises the following steps: molten steel is uniformly distributed in a space surrounded by two casting rolls which rotate oppositely and are cooled by water and a baffle plate made of ceramic material to form a molten pool, the molten steel is solidified on the roll surfaces, and thin strip steel is rolled between the two casting rolls. The double-roller thin-belt casting and rolling process cancels a series of conventional procedures of continuous casting (also known as ingot casting), rough rolling, hot continuous rolling and related heating, end cutting and the like, combines the two procedures of a sub-rapid solidification technology and hot forming into a whole, and greatly shortens the production process flow of steel materials. The double-roller thin strip casting and rolling process has the advantages of saving energy consumption by more than 50%, saving equipment investment by about 70% and the like.
The crystallizing roller is a core component in the continuous casting and rolling process and consists of a roller sleeve, a roller core and a cooling water channel. At present, Chinese patent CN201821673275.1 discloses a cooling roller of a crystallizer for twin-roll strip casting, wherein the cooling water holes are axial water through holes, the inner wall of the water through holes is uneven, the turbulent kinetic energy of cooling water is increased, the boundary layer between the cooling water and the water through holes is reduced or eliminated, the heat transfer efficiency is improved, the probability of scale formation on the inner wall is reduced, and the service life is prolonged; chinese patent CN200710045282.7 is a method for controlling the roll shape of a twin-roll thin-strip continuous casting cooling roll, which adopts an axial water through hole, at least comprises two water collecting ring grooves, and heat-resistant materials are coated at the water collecting ring grooves to avoid the generation of thermal stress due to local expansion; chinese patent CN201510641053.6 is a method and apparatus for controlling cooling strength of twin roll thin strip continuous casting roll, which has one or more water inlet and outlet, where the water inlet and outlet are provided with separate flow regulating valves, and the flow of each water channel is controlled by the regulating valves to realize the same cooling capacity. These prior arts all have the disadvantages of low water passing amount, insufficient cooling capacity, and uneven axial cooling capacity, which causes uneven axial production of products. It is necessary to develop a crystallizer with high cooling capacity and uniform axial cooling capacity.
The utility model has the following contents:
the utility model aims to overcome the defects in the prior art and provide a crystallizer with uniform axial cooling capacity.
In order to achieve the above objects, the present invention provides a twin roll strip casting mold, which has a main structure including: the inner wall of the roller sleeve is provided with a plurality of annular grooves, and the roller sleeve is tightly sleeved on the outer surface of the roller core; the two ends of the roller core are respectively provided with a water inlet and a water outlet, the inner cavity of the roller core is divided into a water inlet cavity and a water outlet cavity by a partition plate, the water inlet cavity is communicated with the water inlet of the roller core, and the water outlet cavity is communicated with the water outlet of the roller core; the roller wall at one side of the roller core water inlet cavity is provided with a plurality of water outlet holes, and the roller wall at one side of the roller core water outlet cavity is provided with a plurality of water inlet holes corresponding to the water outlet holes.
Further, a gap between the groove on the inner wall of the roller sleeve and the outer surface of the roller core forms an annular channel; the groove width of the grooves is 6-30mm, and the center distance between adjacent grooves is 8-20 mm.
Further, the thickness between the bottom surface of the groove on the inner wall of the roller sleeve 1 and the outer surface of the roller sleeve 1 is 2-45 mm.
Furthermore, the material of the roller sleeve base body is beryllium copper or silver copper.
Further, the partition plate divides the inner cavity of the roller core into 2 cavities or 4 cavities or 6 cavities or 8 cavities.
Furthermore, the water outlet holes or the water inlet holes are distributed in an up-and-down staggered interval mode.
The whole inner cavity of the crystallizer can be used as a cooling water passage, so that the water passing amount of the crystallizer is increased; the cooling is carried out in the circumferential direction, so that the problem of uneven cooling in the axial direction is avoided.
Compared with the prior art, the cooling capacity of the crystallizer is greatly improved, the thickness of a plate blank can be improved, the blank drawing speed is improved, and steel grades with different cooling requirements can be produced; meanwhile, the cooling capacity is controllable, and the cooling capacity is controlled by adjusting the water flow rate of cooling water; the axial cooling capacity is uniform, and the quality of the produced product can be improved; the overall structure principle is scientific, the manufacturing method is simple, the cost is low, and the market prospect is wide.
Description of the drawings:
fig. 1 is a schematic view of an internal structure of a twin roll strip casting mold according to the present invention.
Fig. 2 is a schematic view of a cross-sectional structure a-a of a twin roll strip casting mold according to the present invention.
Fig. 3 is a schematic view of an external structure of a roll core of a twin roll strip casting mold according to the present invention.
Fig. 4 is a schematic cross-sectional view illustrating a twin roll strip casting mold according to example 2 of the present invention.
The specific implementation mode is as follows:
the utility model is further illustrated by the following specific examples in combination with the accompanying drawings.
Example 1:
the embodiment relates to a double-roller thin-strip continuous casting crystallizer, the main structure of which comprises a roller sleeve 1 and a roller core 2, wherein the base body of the roller sleeve 1 is made of beryllium copper or silver copper, the inner wall of the roller sleeve 1 is provided with a plurality of annular grooves vertical to the central axis of a roller, and the roller sleeve 1 is tightly sleeved on the outer surface of the roller core 2; the roller core 2 is a hollow circular tube, a water inlet 21 and a water outlet 22 are respectively arranged at two ends of the roller core 2, an inner cavity in the middle of the roller core 2 is divided into a water inlet cavity 4 and a water outlet cavity 5 by a partition plate 3, the water inlet cavity 4 is communicated with the water inlet 21 of the roller core 2, and the water outlet cavity 5 is communicated with the water outlet 22 of the roller core 2; a plurality of water outlet holes 6 are formed in the roller wall on one side of the water inlet cavity 4 of the roller core 2 at intervals, and a plurality of water inlet holes 7 corresponding to the water outlet holes 6 are formed in the roller wall on one side of the water outlet cavity of the roller core 2 at intervals.
And a gap between the groove on the inner wall of the roller sleeve 1 and the outer surface of the roller core 2 forms an annular channel. The groove width of the grooves is 6-30mm, and the center distance between adjacent grooves is 8-20 mm.
The effective thickness of the roller sleeve 1 is 2-45mm, and the effective thickness is the thickness between the bottom surface of the groove and the outer surface of the roller sleeve 1.
The inner cavity of the roller core 2 is divided into 2 cavities by the partition plate 3, one water inlet cavity 4 and one water outlet cavity 5; the partition plate 3 comprises a rectangular plate 31 and two semicircular plates 32, the straight edges of the two semicircular plates 32 are respectively connected with the two ends of the rectangular plate 31 in a right angle, and the curved surfaces of the two semicircular plates 32 are tightly connected on the inner wall of the roller core 2 in an opposite direction; the width of the rectangular plate 31 is the same as the inner diameter of the roller core 2, and the length of the rectangular plate 31 is smaller than that of the middle part of the roller core 2; the inner cavity of the roller core 2 is divided into a water inlet cavity 4 and a water outlet cavity 5 by the partition board 3.
The water outlet holes 6 are arranged in a vertically staggered mode at intervals.
The baffle 3 of this embodiment all has one section distance apart from water inlet and delivery port, more is favorable to the cooling water to get into the intake antrum like this, is favorable to the cooling water play water cavity.
The cooling water flow path of the twin-roll strip casting crystallizer in this embodiment is as follows: cooling water enters the water inlet cavity 4 from the water inlet of the roller core 2, then the cooling water is divided into two paths through the water outlet 6 on the side of the water inlet cavity 4 of the roller core 2 to enter a gap formed by the groove of the roller sleeve 1 and the outer wall of the roller core 2, then the cooling water flows along the gap, enters the water outlet cavity 5 of the roller core 2 through the water inlet 7, and finally flows out of the crystallizer through the water outlet of the roller core 2; the water passing amount of the crystallizer is 80-600 tons/hour.
Example 2:
the difference between the embodiment and the embodiment 1 is that the inner cavity of the middle part of the roller core is divided into 4 cavities by the partition plate, namely two water inlet cavities and two water outlet cavities, each water inlet cavity or water outlet cavity is provided with a corresponding water outlet hole and a corresponding water inlet hole, the middle part of the partition plate 3 is a cross-shaped plate, and the two ends of the partition plate are respectively provided with 2 opposite fan-shaped plates; the water inlet and outlet channels are 4 paths.
Claims (6)
1. A double-roller thin-strip continuous casting crystallizer is characterized in that the main structure comprises a roller sleeve and a roller core, a plurality of annular grooves are arranged on the inner wall of the roller sleeve, and the roller sleeve is tightly sleeved on the outer surface of the roller core; the two ends of the roller core are respectively provided with a water inlet and a water outlet, the inner cavity of the roller core is divided into a water inlet cavity and a water outlet cavity by a partition plate, the water inlet cavity is communicated with the water inlet of the roller core, and the water outlet cavity is communicated with the water outlet of the roller core; the roller wall at one side of the roller core water inlet cavity is provided with a plurality of water outlet holes, and the roller wall at one side of the roller core water outlet cavity is provided with a plurality of water inlet holes corresponding to the water outlet holes.
2. The twin roll strip casting crystallizer of claim 1, wherein a gap between the groove of the inner wall of the roll shell and the outer surface of the roll core forms an annular channel; the groove width of the grooves is 6-30mm, and the center distance between adjacent grooves is 8-20 mm.
3. The twin roll strip casting crystallizer as claimed in claim 1, wherein the thickness between the bottom surface of the groove of the inner wall of the roll shell 1 and the outer surface of the roll shell 1 is 2-45 mm.
4. The twin roll strip casting mold as claimed in claim 1, wherein the material of the roll shell base is beryllium copper or silver copper.
5. The twin roll strip casting crystallizer of claim 1 wherein the partition plate divides the inner cavity of the roll core into 2 or 4 or 6 or 8 cavities.
6. The twin roll strip casting mold according to claim 1, wherein the water outlet holes or the water inlet holes are alternately spaced up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122932566.6U CN216656268U (en) | 2021-11-26 | 2021-11-26 | Double-roller thin-strip continuous casting crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122932566.6U CN216656268U (en) | 2021-11-26 | 2021-11-26 | Double-roller thin-strip continuous casting crystallizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216656268U true CN216656268U (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122932566.6U Active CN216656268U (en) | 2021-11-26 | 2021-11-26 | Double-roller thin-strip continuous casting crystallizer |
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| Country | Link |
|---|---|
| CN (1) | CN216656268U (en) |
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2021
- 2021-11-26 CN CN202122932566.6U patent/CN216656268U/en active Active
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