CN214977612U - Crystallizer graphite plate capable of being used on two sides - Google Patents
Crystallizer graphite plate capable of being used on two sides Download PDFInfo
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- CN214977612U CN214977612U CN202120638764.9U CN202120638764U CN214977612U CN 214977612 U CN214977612 U CN 214977612U CN 202120638764 U CN202120638764 U CN 202120638764U CN 214977612 U CN214977612 U CN 214977612U
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Abstract
A crystallizer graphite plate capable of being used on two sides is used for horizontal continuous casting production of strip billets. The graphite plate is provided with a plurality of screw connecting holes for connecting the water-cooling copper sleeve, and the graphite plate is arranged in the water-cooling copper sleeve through screws to form a crystallization die cavity; the two ends of the screw connecting hole are provided with countersunk holes which are used for accommodating the head of the screw and are matched with the graphite plugs. The countersunk holes are arranged at the two ends of the screw connecting hole, so that the graphite plate can be turned over alternately, on one hand, the grinding times of the graphite plate are greatly reduced, and the downtime caused by waiting is reduced; on the other hand, the service life of the graphite plate is greatly prolonged, and the production cost is reduced. Furthermore, the utility model discloses a set up the heavy platform structure on the counter sink, can make the graphite stopper take out smoothly from the heavy platform, can make the graphite stopper along with the graphite plate coping together again, not only solved coplane problem, reduced the consumption of graphite stopper moreover.
Description
Technical Field
The utility model belongs to the technical field of copper strips base horizontal continuous casting technique and specifically relates to a crystallizer graphite cake that can two-sidedly use.
Background
As shown in fig. 1-2, in the horizontal continuous casting production of a copper strip billet, four graphite plates are required to be installed in a water-cooled copper sleeve 1, a rectangular runner surrounded by the four graphite plates is a crystallization mold cavity, and copper liquid is cooled and condensed when flowing through the crystallization mold cavity to form the copper strip billet. In the process, the copper liquid is transformed from liquid state → liquid solid state (crystal incrustation) → solid state (strip). The graphite plate is divided into three sections of areas along the length direction, the graphite plate surface in the liquid area is completely immersed in the copper liquid without oxidation and mechanical damage, and partial elements can permeate into the surface layer of the graphite plate to a certain depth; the liquid-solid area graphite plate has the worst working conditions, including element infiltration, demoulding action napping, oxidation ablation and the like; the surface of the strip formed after passing through the liquid-solid zone has been completely detached from the graphite sheet face, but the strip temperature is still high, and a certain degree of oxidative ablation is also caused to the graphite sheet in this section. Further, the ribbon may be shaken during the travel in the crystallization cavity, and mechanical damage (galling or grooving) may be caused to the graphite sheet surface. Thus, the graphite plates need frequent replacement or reconditioning maintenance. In order to facilitate the disassembly and assembly, the graphite plates are installed in the water-cooling copper sleeve 1 through screws 3 at present. In order to prevent the copper liquid from entering the screw connecting hole and maintain the integrity of the graphite plate surface, a graphite plug 4 is usually installed in the screw connecting hole and above the head of the screw, and the graphite plug 4 is scraped, matched and ground to be coplanar with the graphite plate surface.
The graphite plate is a high-cost consumable material, the price is about 1 ten thousand yuan generally, and the cost of grinding is not low. In order to reduce the production cost, after a production cycle, the graphite plate is usually removed, and the surface defects of the graphite plate are removed and reused. Because the defect of one side of the graphite plate die cavity is heavy and deep, the casting process requirement can be met only by cutting about 2mm of depth every time, and the graphite plate is scrapped due to insufficient residual thickness at most twice after repair, so that the technical scheme needs to be improved to further reduce the production cost.
SUMMERY OF THE UTILITY MODEL
In order to overcome the deficiency in the background art, the utility model discloses a crystallizer graphite cake that can two-sidedly use adopts following technical scheme:
the utility model provides a crystallizer graphite plate that can two-sidedly use, installs in the water-cooling copper sheathing, forms crystallization die cavity, characterized by: the crystallizer graphite plate is provided with a plurality of screw connecting holes for connecting the water-cooling copper sleeve, countersunk holes are formed in two ends of each screw connecting hole, and the countersunk holes are used for accommodating the heads of screws and are matched with graphite plugs.
Further improve technical scheme, in the counter bore towards water-cooling copper sheathing one end, install the sleeve pipe, the sleeve pipe is used for supporting the bottom surface in this counter bore.
Further improves the technical scheme that the sleeve is a graphite sleeve.
Further improve technical scheme, the one side that the counter sink is located the face is equipped with the heavy platform, and the heavy platform is used for the adaptation graphite stopper.
The technical scheme is further improved, and the sinking platform structure is provided with a conical surface flaring structure.
The technical scheme is further improved, and symmetrical bevel surfaces are arranged at the liquid inlet ends of the graphite plates of the crystallizer.
According to the technical scheme, the screw is a flat head screw.
Owing to adopt above-mentioned technical scheme, compare the background art, the utility model discloses following beneficial effect has:
the countersunk holes are arranged at the two ends of the screw connecting hole, so that the graphite plate can be turned over alternately, on one hand, the grinding times of the graphite plate are greatly reduced, and the downtime caused by waiting is reduced; on the other hand, the service life of the graphite plate is greatly prolonged, and the production cost is reduced.
Furthermore, the utility model discloses a set up the heavy platform structure on the counter sink, can make the graphite stopper take out smoothly from the heavy platform, can make the graphite stopper along with the graphite plate coping together again, not only solved coplane problem, reduced the consumption of graphite stopper moreover.
Drawings
Fig. 1 is a schematic view of a conventional graphite plate connection structure.
Fig. 2 is a schematic cross-sectional view of fig. 1.
Fig. 3 to 4 are schematic structural views of the present invention in example 1.
Fig. 5 is a schematic structural view of the present invention in embodiment 2.
In the figure: 1. water-cooling the copper bush; 2. a graphite plate; 21. sinking a platform; 3. a screw; 4. a graphite plug; a graphite sleeve.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "front", "rear", "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Example 1:
a crystallizer graphite plate 2 capable of being used on two sides is used for horizontal continuous casting production of copper strip billets. As shown in fig. 3, a plurality of screw connection holes for connecting the water-cooled copper bush 1 are provided in the graphite plate 2, and four graphite plates 2 are mounted in the water-cooled copper bush 1 by screws 3 to form a crystallization cavity. And cooling water is introduced into the water-cooled copper bush 1 and used for cooling the graphite plate 2 to cool and condense the copper liquid to form a copper strip blank.
In order to further reduce the production cost, countersunk holes are arranged at two ends of the screw connecting holes of the graphite plates 2, are used for accommodating the heads of the screws 3 and are matched with the graphite plugs 4. Since the lower end of the screw connection hole is also provided with a countersunk hole, the protruding part of the screw connection hole is suspended, and the protruding part is possibly broken by pressure generated when the screw 3 is screwed. For this purpose, a graphite sleeve 5 is installed in a countersunk hole facing one end of the water-cooled copper bush 1, and the graphite sleeve 5 is used for supporting the bottom surface of the protruding part of the screw connecting hole so that the protruding part is supported. The use of the graphite sleeve 5 has the advantage of facilitating the adjustment of the height of the support by scraping. Of course, sleeves of other materials can be used to achieve the same purpose. In order to reduce the depth of the countersunk hole and reduce the occupation of the countersunk hole on the thickness of the graphite plate 2, the screw 3 adopts a large-cover countersunk screw with a straight groove or a cross groove.
As can be seen from fig. 3, when the graphite plate 2 is worn and oxidized toward the surface a of the crystallization mold cavity, the graphite plate 2 can be removed, the surface a is simply flattened, and then turned over and installed in the water-cooled copper bush 1, so that the surface a of the graphite plate 2 faces the water-cooled copper bush 1 and is attached to the water-cooled copper bush 1; the unworn B surface of graphite sheet 2 faces inward at this time, and a new crystallization cavity is formed. Because the graphite plate 2 is only attached to the water-cooling copper sleeve 1 for heat conduction, the depth of the graphite plate 2A surface flattening treatment is shallow, and is usually only dozens of lines (1 line is equal to 0.01 mm), and the influence of the depth on the size of the working surface of the crystal mold cavity can be ignored. When the surface B facing the crystallization mold cavity is worn and oxidized, the graphite plate 2 is detached again, and the surface B of the graphite plate 2 is simply flattened to meet the heat conduction requirement; grinding the surface A of the graphite plate 2 to meet the requirement of the flatness of the crystal surface, and turning over again for use. Thus, after two uses, the graphite plate 2 is ground only once, and the total thickness of the graphite plate 2 is reduced by only 2 mm. This is a crystallization cavity in which the working face dimensions do not vary significantly and which has less effect on the ribbon dimensions. For the existing graphite plate 2 used on one side, after the graphite plate 2 is used twice, the graphite plate 2 needs to be polished twice, the total thickness of the graphite plate 2 is reduced by 4mm, and the influence on the size of a belt blank is large. As can be known through the comparison, the graphite plates 2 are turned over alternately, the use times and the service life of the graphite plates 2 can be improved, and the influence of the grinding depth of the graphite plates 2 on the size of the belt blank is reduced.
After the graphite plates are alternately turned over for several times, the total thickness of the graphite plates 2 is reduced greatly, the influence on the size of the belt blank is also large, and at the moment, the new graphite plates 2 are replaced, or thin copper plates are additionally arranged between the graphite plates 2 and the water-cooling copper sleeve 1, so that the service life of the graphite plates 2 is prolonged. The thin copper plate is on the one hand heat conductive and on the other hand compensates for the influence of the reduced thickness of the graphite plate 2 on the size of the belt blank.
As shown in fig. 2, a notch surface is generally provided at the liquid inlet end of the graphite plate 2, and the notch surface is used for connecting the furnace mouth. In order to prevent the alternate turnover of the graphite plates 2 from being affected, as shown in fig. 4, symmetrical bevel surfaces are provided at the liquid inlet ends of the graphite plates 2. Another beneficial effect that such design can play is that two relative graphite cake 2 have formed the funnel structure at the inlet end, are favorable to the copper liquid to flow into the crystallization die intracavity.
In example 1, the graphite plug 4 is installed in the countersunk hole and is tightly matched with the countersunk hole to prevent the molten copper from entering the countersunk hole, so that the molten copper can be taken out only by breaking the molten copper during disassembly. During installation, a new graphite plug 4 is used, and the upper plane of the new graphite plug 4 is scraped and matched to enable the graphite plug 4 to be coplanar with the graphite plate 2. Obviously, such an approach is neither economical nor energy intensive.
Example 2:
in order to overcome the disadvantages of embodiment 1, as shown in fig. 5, a counter sink 21 is provided on the side of the counter sink located on the plate surface, and the counter sink 21 has a conical flare. The graphite plug 4 is arranged in the sinking platform 21 and is matched with the shape of the conical surface of the sinking platform 21. Obviously, the conical surface cooperation of graphite stopper 4 and heavy platform 21 is favorable to not only improving the leakproofness, prevents that copper liquid from getting into the countersunk head hole, is favorable to again borrowing tools such as sucking disc to take out graphite stopper 4 from heavy platform 21. In addition, due to the existence of the sinking platform 21, the height of the upper plane of the graphite plug 4 is not determined by the height of the head of the screw 3 any more, so the graphite plug 4 can be installed in the sinking platform 21 and polished together with the graphite plate 2, and the graphite plug does not need to be ground with the surface of the graphite plate 2 separately during installation. Obviously, this is more economical and also reduces the amount of work.
The part of the utility model not detailed is prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a crystallizer graphite plate that can two-sidedly use, installs in the water-cooling copper sheathing, forms crystallization die cavity, characterized by: the crystallizer graphite plate is provided with a plurality of screw connecting holes for connecting the water-cooling copper sleeve, countersunk holes are formed in two ends of each screw connecting hole, and the countersunk holes are used for accommodating the heads of screws and are matched with graphite plugs.
2. A crystallizer graphite plate capable of double-sided use as claimed in claim 1, wherein: and a sleeve is arranged in the countersunk hole at one end facing the water-cooling copper sleeve and is used for supporting the bottom surface of the countersunk hole.
3. A crystallizer graphite plate capable of double-sided use as claimed in claim 2, wherein: the sleeve is a graphite sleeve.
4. A crystallizer graphite plate capable of double-sided use as claimed in claim 1, 2 or 3, characterized in that: one side of the countersunk hole, which is positioned on the plate surface, is provided with a sunk platform, and the sunk platform is used for being matched with the graphite plug.
5. A crystallizer graphite plate capable of double-sided use as claimed in claim 4, wherein: the sinking platform is provided with a conical surface flaring structure.
6. A crystallizer graphite plate capable of double-sided use as claimed in claim 1, wherein: and the liquid inlet end of the graphite plate of the crystallizer is provided with symmetrical bevel surfaces.
7. A crystallizer graphite plate capable of double-sided use as claimed in claim 1, wherein: the screw is a flat head screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120638764.9U CN214977612U (en) | 2021-03-30 | 2021-03-30 | Crystallizer graphite plate capable of being used on two sides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120638764.9U CN214977612U (en) | 2021-03-30 | 2021-03-30 | Crystallizer graphite plate capable of being used on two sides |
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| Publication Number | Publication Date |
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| CN214977612U true CN214977612U (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120638764.9U Active CN214977612U (en) | 2021-03-30 | 2021-03-30 | Crystallizer graphite plate capable of being used on two sides |
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- 2021-03-30 CN CN202120638764.9U patent/CN214977612U/en active Active
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