CN214814633U

CN214814633U - Fin formula crystallizer copper pipe and crystallizer

Info

Publication number: CN214814633U
Application number: CN202121180489.7U
Authority: CN
Inventors: 芦德田
Original assignee: Anhui Jingjin Continuous Casting Technology Co ltd
Current assignee: Anhui Jingjin Continuous Casting Technology Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-11-23
Anticipated expiration: 2031-05-31

Abstract

The utility model relates to a continuous casting technical field specifically discloses a fin formula crystallizer copper pipe, including upper portion high temperature section and lower part low temperature section, the wall thickness of upper portion high temperature section is greater than the wall thickness of lower part low temperature section, and the outer wall of upper portion high temperature section is equipped with cooling trough. The utility model discloses can distinguish the cooling to the difference of thermal current density about the crystallizer copper pipe, thereby the deformation ability is resisted in the increase of copper pipe upper portion high temperature section increase wall thickness, opens simultaneously cooling trough and reduces cooling water and hot face distance, makes the cooling water take away the nuclear bubble of copper pipe cold face fast from laminar flow to torrent, turbulent flow to this kind of sudden change rivers form of cooling trough by the water seam.

Description

Fin formula crystallizer copper pipe and crystallizer

Technical Field

The utility model relates to a continuous casting technical field especially relates to a fin formula crystallizer copper pipe and crystallizer that is fit for high pulling speed high life of continuous casting.

Background

The mold is called a core of a continuous casting machine as the most important component of the continuous casting machine. Therefore, the quality of the continuous casting billet is influenced in all aspects of design, manufacture, use and maintenance. The continuous casting and drawing speed is one of the important indexes reflecting the technical equipment and process design level of a continuous casting machine, and the index is continuously improved along with the development of the continuous casting technology, particularly under the policy requirement of 2030 carbon peak reaching. The improvement of the pulling speed can greatly improve the single-flow production capacity, reduce the production consumption and labor fixation, improve the automatic control level and has very great economic benefit.

The traditional small square billet crystallizer adopts water gap cooling, and the cooling mode has the defects that the water gap uniformity is difficult to ensure, the corner part of a billet shell is supercooled due to two-dimensional heat transfer of the corner part, the meniscus part of a copper pipe is easy to be overheated and softened and the like, so that the further improvement of the pulling speed is limited, and the surface cracks, the stripping and even the steel leakage accidents of a casting blank are easy to cause. The existing crystallizer assembled by a water jacket combined with a slotting design form and a finish machining on the outer wall of an integral copper pipe has the problems that the copper pipe is cooled without distinction due to huge difference of the upper and lower heat transfer quantities, the copper pipe at a meniscus is easy to deform, and the replacement and disassembly of the copper pipe are difficult.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fin formula crystallizer copper pipe and crystallizer to overcome the crystallizer pulling speed among the prior art and promote difficult, the easy deformation of copper pipe damages, the difficult scheduling problem is dismantled to the copper pipe.

In order to solve the technical problem, the utility model provides a fin formula crystallizer copper pipe, including upper portion high temperature section and lower part low temperature section, the wall thickness of upper portion high temperature section is greater than the wall thickness of lower part low temperature section, the outer wall of upper portion high temperature section is equipped with cooling trough.

Preferably, the device also comprises a chamfer transition section positioned between the upper high-temperature section and the lower low-temperature section, and the outer wall of the chamfer transition section is a chamfer structure connected with the outer wall of the upper high-temperature section and the outer wall of the lower low-temperature section.

Preferably, the fin type crystallizer copper pipe is a square pipe, and the corner of the square pipe is of a round angle structure.

Preferably, a plurality of cooling water tanks which are uniformly arranged in the vertical direction are arranged on four side surfaces of the outer wall of the upper high-temperature section.

Preferably, the inner diameters of the upper high-temperature section and the lower low-temperature section are inverted, and the outer diameter of the upper high-temperature section is larger than that of the lower low-temperature section.

Preferably, the outer diameter of the upper high-temperature section is 2mm to 5mm larger than the outer diameter of the lower low-temperature section.

Preferably, the length of the upper high-temperature section is 300-400 mm, the length of the chamfer transition section is 30-70 mm, and the length of the lower low-temperature section is 500-700 mm.

The utility model also provides a crystallizer, including the water jacket with fin formula crystallizer copper pipe, fin formula crystallizer copper pipe is established the inside of water jacket.

Preferably, the outer wall of the upper high-temperature section of the fin type crystallizer copper pipe is attached to the inner wall of the water jacket, and a water gap of 2-5 mm is arranged between the outer wall of the lower low-temperature section of the fin type crystallizer copper pipe and the inner wall of the water jacket.

Preferably, the upper high-temperature section of the fin type crystallizer copper pipe is combined with the water jacket through a bolt.

The utility model discloses a fin formula crystallizer copper pipe and crystallizer can distinguish the cooling to the difference of thermal current density about the crystallizer copper pipe, thereby the increase of copper pipe upper portion high temperature section increases the wall thickness and resists deformability, opens simultaneously cooling trough and reduces cooling water and hot face distance, makes the cooling water follow laminar flow to torrent, turbulent flow take away copper pipe cold face nuclear bubble fast to this kind of sudden change rivers form of cooling trough by the water seam, the utility model discloses this kind of crystallizer reaches the policy requirement of peak to national 2030 year carbon, and the product satisfies the steel mill and promotes speed, reduces the demand of unit energy consumption, makes things convenient for the change of parts such as on-the-spot assembly and water jacket, copper pipe simultaneously.

Drawings

Fig. 1 is a schematic view of the fin type crystallizer copper tube and water jacket in accordance with an embodiment of the present invention;

FIG. 2 is a cross-sectional view at A-A of FIG. 1;

FIG. 3 is a cross-sectional view at B-B of FIG. 1;

FIG. 4 is a cross-sectional view at C-C of FIG. 1;

fig. 5 is a schematic diagram of the position of the bolt at the joint of the copper tube and the water jacket of the fin-type crystallizer according to the embodiment of the present invention.

In the figure, 1: fin type crystallizer copper pipe; 11: an upper high temperature section; 111: a cooling water tank; 12: chamfering the transition section; 13: a lower low temperature section; 2: a water jacket; 3: a bolt; 4: and (7) water sewing.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1 to 5, the fin type crystallizer copper tube of the present embodiment includes: the wall thickness of upper portion high temperature section 11 is greater than the wall thickness of lower part low temperature section 13 with lower part low temperature section 13, and the outer wall of upper portion high temperature section is equipped with cooling trough 111. The copper pipe water jacket further comprises a chamfering transition section 12 located between the upper high-temperature section 11 and the lower low-temperature section 13, the outer wall of the chamfering transition section 12 is of a chamfering structure connecting the outer wall of the upper high-temperature section 11 and the outer wall of the lower low-temperature section 13, the copper pipe and the water jacket are convenient to disassemble and assemble, and the cooling water tank 111 of the upper high-temperature section 11 extends to the chamfering transition section 12 to be communicated with a water seam 4 formed by the lower low-temperature section 13 and the water jacket 2. Can distinguish the cooling to the difference of crystallizer copper pipe upper and lower heat flux density, thereby the increase of copper pipe upper portion high temperature section increases the wall thickness and resists the deformability, opens the cooling water tank simultaneously and reduces cooling water and hot face distance, makes the cooling water take away copper pipe cold face nuclear state bubble fast from laminar flow to torrent, turbulent flow by this kind of sudden change rivers form of water seam to cooling water tank. Meanwhile, the heat flux density of the lower half part of the copper pipe tends to be stable, the thickness of the blank shell is increased, the temperature of the copper pipe is reduced, the wall thickness of the copper pipe can be reduced, the water inlet area is increased, the water gaps around the copper pipe are ensured to be uniform, and the weight and the cost of the copper pipe are reduced.

The fin type crystallizer copper pipe 1 is a square pipe, and the corner of the square pipe is of a fillet structure. Four sides of the outer wall of the upper high temperature section 11 are provided with a plurality of cooling water channels 111 which are uniformly arranged in the vertical direction, and the corner of the square tube is not provided with a cooling water channel. Because the two-dimensional heat transfer temperature of the casting blank corner is lower than that of the face, the side grooving corner keeps the original wall thickness, the transverse temperature gradient change of the blank shell is balanced, the initial blank shell at the meniscus (namely the fillet structure of the square tube corner) is particularly important, and the defects of casting blank corner cracks, near corner depressions, square falling and the like can be prevented.

The inner diameters of the upper high-temperature section 11 and the lower low-temperature section 13 are inverted taper, and the outer diameter of the upper high-temperature section 11 is larger than that of the lower low-temperature section 13. The outer diameter of the upper high-temperature section 11 is 2 mm-5 mm larger than that of the lower low-temperature section 13. The length of the upper high-temperature section 11 can be 300 mm-400 mm, the length of the chamfer transition section 12 can be 30 mm-70 mm, the length of the lower low-temperature section 13 can be 500 mm-700 mm, and the specific size can be as follows: the length of the upper high-temperature section 11 is 350mm, the length of the chamfer transition section 12 is 50mm, and the length of the lower low-temperature section 13 is 600 mm.

The crystallizer of the present embodiment includes: the water jacket 2 and the fin type crystallizer copper pipe 1, the fin type crystallizer copper pipe 1 is arranged in the water jacket 2. The outer wall of the upper high-temperature section 11 of the fin type crystallizer copper pipe 1 is attached to the inner wall of the water jacket 2, and a water gap 4 of 2-5 mm is arranged between the outer wall of the lower low-temperature section 12 of the fin type crystallizer copper pipe 1 and the inner wall of the water jacket 2.

The upper high-temperature section 11 of the fin type crystallizer copper pipe 1 can be matched with the water jacket 2 through a bolt 3 to prevent the copper pipe from deforming.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The fin type crystallizer copper tube is characterized by comprising an upper high-temperature section (11) and a lower low-temperature section (13), wherein the wall thickness of the upper high-temperature section (11) is larger than that of the lower low-temperature section (13), and a cooling water tank (111) is arranged on the outer wall of the upper high-temperature section.

2. The Fin crystallizer copper tube according to claim 1, further comprising a chamfered transition section (12) between the upper high temperature section (11) and the lower low temperature section (13), wherein an outer wall of the chamfered transition section (12) is a chamfered structure connecting an outer wall of the upper high temperature section (11) and an outer wall of the lower low temperature section (13).

3. The fin type crystallizer copper tube as claimed in claim 1, wherein the fin type crystallizer copper tube (1) is a square tube and corners of the square tube are in a round corner structure.

4. The Fin crystallizer copper tube according to claim 3, wherein a plurality of cooling water grooves (111) are uniformly arranged in the vertical direction on four side surfaces of the outer wall of the upper high temperature section (11).

5. The Fin crystallizer copper tube according to claim 1, wherein the inner diameters of the upper high temperature section (11) and the lower low temperature section (13) have reverse tapers, and the outer diameter of the upper high temperature section (11) is larger than the outer diameter of the lower low temperature section (13).

6. Fin crystallizer copper tube according to claim 5, characterized in that the outer diameter of the upper high temperature section (11) is 2-5 mm larger than the outer diameter of the lower low temperature section (13).

7. The Fin crystallizer copper tube according to claim 2, wherein the length of the upper high temperature section (11) is 300mm to 400mm, the length of the chamfer transition section (12) is 30mm to 70mm, and the length of the lower low temperature section (13) is 500mm to 700 mm.

8. Crystallizer, characterized in that it comprises a water jacket (2) and a finned crystallizer copper tube (1) according to any one of claims 1 to 7, said finned crystallizer copper tube (1) being arranged inside said water jacket (2).

9. The crystallizer of claim 8, wherein the outer wall of the upper high-temperature section (11) of the fin-type crystallizer copper pipe (1) is attached to the inner wall of the water jacket (2), and a water gap of 2-5 mm is formed between the outer wall of the lower low-temperature section (13) of the fin-type crystallizer copper pipe (1) and the inner wall of the water jacket (2).

10. Crystallizer as in claim 8, characterized in that the upper high temperature section (11) of the finned crystallizer copper tube (1) is engaged with the water jacket (2) by means of bolts (3).