CN211386822U

CN211386822U - High-efficient conticaster crystallizer copper

Info

Publication number: CN211386822U
Application number: CN201922016965.0U
Authority: CN
Inventors: 肖永峰; 刘贵法; 刘晓军
Original assignee: Shijiazhuang Guangda Machinery Co ltd
Current assignee: Shijiazhuang Guangda Machinery Co ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-09-01
Anticipated expiration: 2029-11-21

Abstract

The utility model discloses a high-efficiency crystallizer copper plate of a continuous casting machine, which comprises a copper plate body and a plurality of transverse cooling channels which are longitudinally arranged in the copper plate body at intervals; each transverse cooling channel comprises a transverse cold water hole drilled in the copper plate body in a transverse mode, a middle water hole formed in the middle of the cold surface, side water holes formed in the cold surface and located on two sides of the middle water hole, and a plug fixed at the port of the transverse cold water hole in a sealing mode; the middle water hole and the side water hole are communicated with the transverse cold water hole. The utility model discloses a be the transverse cooling mode, such mode cooling is even, and along with the increase in business turn over water hole, can improve the flow of cooling water by a wide margin moreover, improves the cooling effect, reaches the prerequisite of high speed of drawing.

Description

High-efficient conticaster crystallizer copper

Technical Field

The utility model belongs to the technical field of the conticaster for the steelmaking, especially, relate to a high-efficient conticaster crystallizer copper.

Background

The crystallizer is the heart of a continuous casting machine, the structural design of the crystallizer can directly influence the casting blank drawing speed and the casting blank quality, and the crystallizer is a key technology in modern steelmaking continuous casting production.

The crystallizer can be divided into five categories, namely a square billet crystallizer, a rectangular billet crystallizer, a round billet crystallizer, a plate blank crystallizer and a special-shaped billet crystallizer according to the shape of a produced casting blank, and can be divided into the following categories according to the cooling modes: the water jacket and the copper pipe are assembled (mainly used for the tubular crystallizers of square billets, round billets and rectangular billets), spray type (mainly used for the tubular crystallizers), a water tank type is opened on the cold surface of the copper plate or the copper pipe, and the longitudinal drilling type is drilled on the copper plate or the copper pipe.

The defects of the prior art are mainly reflected in the cooling mode of the crystallizer and the design parameters of the inner cavity of the crystallizer. The specific defects are as follows:

1. the defects of the crystallizer with assembled water jacket and copper pipe are as follows: the copper pipe is weak in fixation, cannot be supported powerfully, is easy to deform under the action of thermal stress and ferrostatic pressure, and the taper of an inner cavity is easy to change. The taper is increased, the throwing resistance is increased, and a crystallizer copper pipe is damaged. The taper is reduced or is negative, the air gap between the steel billet and the copper wall is increased, the heat conduction efficiency is reduced, and the steel leakage accident can be caused; secondly, the water gap structure of the copper pipe and the water jacket limits the flow rate and the cooling uniformity of cooling water, the cooling water on a cold surface is easy to boil intermittently at a high drawing speed, the cooling effect is influenced, the effective blank shell thickness of a steel billet out of a crystallizer cannot be achieved, and steel leakage accidents can be caused; the structure limits the cooling uniformity, and the corner is subjected to two-dimensional heat conduction, so that the corner is easily cooled excessively, and the corner cracks and other defects are generated.

2. The defects of the spray type crystallizer are as follows: the structure cancels a water jacket and a water gap structure, adopts spray cooling, can not be supported powerfully, is easy to deform under the action of thermal stress and ferrostatic pressure, and the taper of an inner cavity is easy to change. The taper is increased, the throwing resistance is increased, and a crystallizer copper pipe is damaged. The taper is reduced or is negative, the air gap between the steel billet and the copper wall is increased, the heat conduction efficiency is reduced, and the steel leakage accident can be caused; secondly, the structure is uniformly cooled, but the cooling efficiency is low, and the cooling effect required by high drawing speed cannot be achieved;

3. the slotted crystallizer with the cold surface of the copper plate or the copper pipe has the following defects: the grooving of the cold surface of the copper pipe aims to increase the cooling area and improve the cooling effect, but reduces the deformation resistance of the copper pipe, can be used only once and cannot be repaired and used for many times, and the production cost is increased. Secondly, because the copper pipe is longitudinally grooved, the cross section area of a water inlet and a water outlet is limited, the flow of cooling water cannot be greatly increased again, and the billet drawing speed cannot realize the ideal high drawing speed effect. The difficulty of manufacturing the grooves on the cold surface of the copper plate is high, particularly the arc-shaped copper plate is difficult to machine, and the machining precision of the cooling groove is difficult to ensure; and fourthly, the problem of arrangement of bolt holes is also considered in the process of slotting the cold surface of the copper plate, and the uniformity of cooling cannot be guaranteed no matter how the bolt holes are arranged.

4. The defects of the copper pipe or the copper plate longitudinal drilling type crystallizer are as follows: firstly, the number of the copper pipes is large, the copper pipes are manufactured by drilling and then extrusion molding, the drilling depth is large, the manufacturing cost is high, and the drilling precision is difficult to guarantee; secondly, due to the limitation of the arrangement of the cooling holes, the cooling device can be used only once and cannot be repaired and used for many times, so that the resource waste is caused, and the production cost is increased; and thirdly, the longitudinal drilling holes of the copper plate are mainly applied to the straight-face copper plate, so that the cost is relatively high. The longitudinal drilling of the cambered surface copper plate can hardly be realized, or the manufacturing process is relatively complex, and the manufacturing cost is very high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an improve cooling efficiency of crystallizer and high-efficient conticaster crystallizer copper of cooling homogeneity.

In order to achieve the above technical objective, the utility model discloses the technical scheme who takes is:

a high-efficiency crystallizer copper plate of a continuous casting machine comprises a copper plate body and a plurality of transverse cooling channels which are longitudinally arranged in the copper plate body at intervals; the number of the transverse cooling channels is more than one;

the copper plate body is provided with a cold surface and a hot surface positioned at the opposite side of the cold surface;

each transverse cooling channel comprises a transverse cold water hole drilled in the copper plate body in a transverse mode, a middle water hole formed in the middle of the cold surface, side water holes formed in the cold surface and located on two sides of the middle water hole, and a plug fixed at the port of the transverse cold water hole in a sealing mode;

the middle water hole and the side water hole are communicated with the transverse cold water hole.

As a further improvement of the utility model, the cross-sectional area of the middle water hole is equal to the sum of the cross-sectional areas of the two lateral water holes.

As a further improvement of the utility model, the middle water hole is used as a cooling water inlet hole, and the side water hole is used as a cooling water outlet hole; or the middle water hole is used as a cooling water outlet hole, and the side water hole is used as a cooling water inlet hole.

As a further improvement, the through-hole of horizontal cold water hole for lining up the copper body, the both ends in horizontal cold water hole seal up the jam through the plug respectively.

As a further improvement, the transverse cold water hole is a blind hole, and the blind hole port of the transverse cold water hole is sealed and blocked by a plug.

As a further improvement of the utility model, the cold side is straight face, be provided with the bolt hole that is used for the installation on the cold side.

As a further improvement of the utility model, the hot surface is an intrados surface or an extrados surface.

As a further improvement of the utility model, the hot side is straight, and two copper body sides that have horizontal cold water hole port are arcwall face or straight face.

As a further improvement of the utility model, the transverse cold water hole is a straight hole parallel to the hot surface or an inclined hole with an included angle with the hot surface.

As a further improvement of the utility model, the left half hole of the inclined hole is symmetrical with the right half hole thereof.

Compared with the prior art, the utility model discloses the beneficial effect who gains as follows:

1. the strength is improved: the structure is a copper plate combined structure and is formed by combining four copper plates and four corresponding water tanks. The integral strength after the assembly is far higher than that of a tubular crystallizer, so that the influence of the static pressure and the thermal stress of molten steel on the crystallizer can be completely overcome;

2. any lumen parameter can be realized: the copper plate combination type is adopted, four sides are processed independently during processing, a numerical control processing center is utilized, accurate processing of any inverted taper and any arc angle can be achieved, and processing precision can be controlled within 0.02 mm. Therefore, the precision of the crystallizer can completely meet the use requirement;

3. the cooling effect is greatly optimized: the structure is one of the bright points of the structure, and breaks through the design thinking of the traditional crystallizer. The traditional design thinking has been to adopt a mode of cooling water entering and exiting from the water, and the structure adopts a transverse cooling mode. The cooling in such a mode is uniform, and the flow of cooling water can be greatly improved along with the increase of the water inlet and outlet holes, so that the cooling effect is improved, and the necessary condition of high drawing speed is achieved.

4. Different cooling effects can be achieved by implementing the cooling in stages: the structure is also one of the bright points of the structure, and the implementation method of the structure is to longitudinally divide a water inlet cavity of a water tank of the crystallizer into three independent water cavities, namely an upper water cavity, a middle water cavity and a lower water cavity. In actual operation, the cooling water flow and the cooling water flow rate of each section can be automatically controlled according to the real-time temperature detected by the thermocouple, so that the cooling optimal state of the crystallizer is achieved.

5. The quality of the plating layer is optimized, and the steel passing amount is improved: the effect is mainly superior to that of a tubular crystallizer which is formed by extrusion, the inner cavity of a copper tube of the formed crystallizer limits a plating layer, only chromium can be electroplated to be used as a wear-resistant layer, even if a nickel-chromium composite layer is tried at present, the effect is not obvious, and the effect of improving the steel passing amount is limited. The combined crystallizer copper plate can realize various coatings like a slab crystallizer copper plate, can avoid a high-temperature area according to the solidification and abrasion conditions of steel billets, plate nickel-cobalt alloy with reasonable thickness on the abrasion serious part above the lower opening of the crystallizer, and plate a chromium coating on the whole hot surface of the copper plate after the nickel-cobalt coating is subjected to finish machining. Thus, the heat transfer performance is not influenced, and the steel passing amount is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic side view of a first embodiment of the present invention;

fig. 2 is a schematic front structural view of a first embodiment of the present invention;

fig. 3 is a schematic side view of a second embodiment of the present invention;

fig. 4 is a schematic front structural view of a second embodiment of the present invention;

fig. 5 is a schematic side view of a third embodiment of the present invention;

fig. 6 is a schematic front structural view of a third embodiment of the present invention;

fig. 7 is a schematic side view of a fourth embodiment of the present invention;

fig. 8 is a schematic front structural view of a fourth embodiment of the present invention;

FIG. 9 is a schematic view of the cross cooling holes of the embodiment of the present invention in a slanted hole pattern with an angle to the hot side;

FIG. 10 is a schematic view of an alternative embodiment of the present invention in which the cross cooling holes are angled with respect to the hot side;

fig. 11 is a schematic structural view of the transverse cooling holes of the embodiment of the present invention being straight holes parallel to the hot side.

Wherein: 1 copper body, 2 hot faces, 3 cold faces, 4 transverse cooling holes, 5 middle water holes, 6 side water holes, 7 bolt holes and 8 screw plugs.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the embodiments described in the figures are only some embodiments of the present application, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it is also to be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Example one

As shown in fig. 1 and 2, the crystallizer copper plate of the high-efficiency continuous casting machine comprises a copper plate body 1 and a plurality of transverse cooling channels which are longitudinally arranged in the copper plate body 1 at intervals;

the copper plate body 1 is provided with a cold surface 3 and a hot surface 2 which is positioned at the opposite side of the cold surface 3;

each transverse cooling channel comprises a transverse cold water hole 4 drilled in the copper plate body 1 transversely, a middle water hole 5 formed in the middle of the cold surface 3, side water holes 6 formed in the cold surface 3 and located on two sides of the middle water hole 5, and a plug 8 fixed at the port of the transverse cold water hole 4 in a sealing mode;

the middle water hole 5 and the side water hole 6 are communicated with the transverse cold water hole 4.

Further, the cross-sectional area of the middle water hole 5 is equal to the sum of the cross-sectional areas of the two side water holes 6.

Further, the middle water hole 5 is used as a cooling water inlet hole, and the side water hole 6 is used as a cooling water outlet hole; or the middle water hole 5 is used as a cooling water outlet hole, and the side water hole 6 is used as a cooling water inlet hole.

Further, the transverse cold water hole 4 is a through hole penetrating through the copper plate body 1, and two ends of the transverse cold water hole 4 are sealed and blocked through the screw plugs 8 respectively.

Furthermore, the transverse cold water hole 4 is a blind hole, and the blind hole end of the transverse cold water hole 4 is sealed and blocked by a screwed plug 8.

Further, the cold surface 3 is a straight surface, and a bolt hole 7 for installation is arranged on the cold surface 3.

Further, the hot surface 2 is an intrados surface.

Example two

As shown in fig. 3 and 4, this embodiment is different from the first embodiment in that the hot face 2 of the copper plate body 1 is an extrados face.

EXAMPLE III

As shown in fig. 5 and 6, this embodiment is different from the second embodiment in that both the hot side 2 and the cold side 3 of the copper plate body 1 are straight sides,

the side surfaces of the two copper plate bodies 1 with the ports of the transverse cold water holes 4 are arc surfaces.

Example four

As shown in fig. 7 and 8, the embodiment is different from the third embodiment in that the two copper plate bodies 1 having the ports of the transverse cold water holes 4 have straight side surfaces.

In the above four embodiments, the transverse cold water hole 4 is an inclined hole having an included angle with the hot surface, and the left half hole of the inclined hole is symmetrical to the right half hole thereof. The inclined hole is in two forms of figure 9 or figure 10.

As shown in fig. 11, the transverse cold water hole 4 may be a straight hole parallel to the hot side 2.

The crystallizer copper plate structure in the four embodiments changes the traditional design thinking, changes the original longitudinal water channel into a transverse water channel, and comprises a copper plate, a plurality of transverse cooling holes, a plurality of screw plugs, a plurality of water inlet holes, a plurality of water outlet holes and a plurality of assembling bolt holes. The copper plate can be a square billet crystallizer copper plate, a rectangular billet crystallizer copper plate or a slab crystallizer copper plate. The plurality of transverse cooling holes are drilled in the transverse direction of the copper plate and serve as cooling water channels, the transverse cooling holes can be drilled into through holes, and the two ends of each transverse cooling hole are sealed through pipe plugs. The transverse cooling hole can also be drilled as a blind hole, and one end of the transverse cooling hole is sealed by a screwed plug. The number of the transverse cooling holes can be increased or decreased according to the use condition. The transverse cooling holes are arranged along with the hot surface of the crystallizer copper plate during machining, the hot surface can be an arc surface or a straight surface, all the transverse cooling holes can keep consistent distance with the hot surface, the distance between the transverse cooling holes and the hot surface can also be inconsistent according to the cooling condition, the transverse cooling holes can be straight holes parallel to the hot surface, and two inclined holes with small angles with the hot surface can be machined according to the cooling effect (the angles of the two inclined holes are opposite to that of the inclined holes in the figures 9 and 10) as shown in figures 9 and 10. And a plurality of the pipe plugs are used for plugging the transverse cooling holes, and standard parts or non-standard workpieces can be adopted. The plurality of water inlet holes are drilled in the mounting surface (cold surface) as shown in the figure, and each corresponding transverse cooling hole is drilled through for allowing cooling water to pass through and enter the transverse cooling hole. The water outlet holes are drilled in the mounting surface (cold surface), and the transverse cooling holes corresponding to the water outlet holes are drilled through for the cooling water to flow out of the transverse cooling holes. The water inlet holes and the water outlet holes can be mutually exchanged according to the situation in use, under the general condition, one row of holes in the middle is considered as the water inlet holes, two rows of holes on two sides are the water outlet holes, two rows of holes on two sides can also be considered as the water inlet holes, and one row of holes in the middle is the water outlet holes. A plurality of assembly bolt holes mainly use with the water tank assembly, can select specification and quantity wantonly according to the condition.

According to the four embodiments, the crystallizer of the continuous casting machine is formed by combining four copper plates which are respectively used as an outer arc copper plate, an inner arc copper plate and two symmetrical narrow-face copper plates of the crystallizer, one narrow-face copper plate is fixedly connected between one side of the outer arc copper plate and one side of the inner arc copper plate, and the other narrow-face copper plate is fixedly connected between the other opposite side of the outer arc copper plate and the other opposite side of the inner arc copper plate. Preferably, the outer-arc copper plate can adopt the copper plate structure described in the first embodiment, the inner-arc copper plate can adopt the copper plate structure described in the second embodiment, and the narrow-side copper plate adopts the copper plate structure described in the third embodiment.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a high-efficient conticaster crystallizer copper which characterized in that: the cooling device comprises a copper plate body (1) and a plurality of transverse cooling channels which are longitudinally arranged in the copper plate body (1) at intervals;

the copper plate body (1) is provided with a cold surface (3) and a hot surface (2) which is positioned on the opposite side of the cold surface (3);

each transverse cooling channel comprises a transverse cold water hole (4) which is drilled in the copper plate body (1) transversely, a middle water hole (5) which is formed in the middle of the cold surface (3), side water holes (6) which are formed in the cold surface (3) and located on two sides of the middle water hole (5), and a plug (8) which is fixed at the port of the transverse cold water hole (4) in a sealing mode;

the middle water hole (5) and the side water hole (6) are communicated with the transverse cold water hole (4).

2. The crystallizer copper plate of the high-efficiency continuous casting machine according to claim 1, characterized in that: the cross-sectional area of the middle water hole (5) is equal to the sum of the cross-sectional areas of the two side water holes (6).

3. The crystallizer copper plate of the high-efficiency continuous casting machine according to claim 2, characterized in that: the middle water hole (5) is used as a cooling water inlet hole, and the side water hole (6) is used as a cooling water outlet hole; or the middle water hole (5) is used as a cooling water outlet hole, and the side water hole (6) is used as a cooling water inlet hole.

4. The crystallizer copper plate of the high-efficiency continuous casting machine according to claim 1, characterized in that: the transverse cold water hole (4) is a through hole penetrating through the copper plate body (1), and two ends of the transverse cold water hole (4) are sealed and blocked through the screw plugs (8) respectively.

5. The crystallizer copper plate of the high-efficiency continuous casting machine according to claim 1, characterized in that: the transverse cold water hole (4) is a blind hole, and the blind hole port of the transverse cold water hole (4) is sealed and blocked by a plug (8).

6. The crystallizer copper plate of the high-efficiency continuous casting machine according to claim 1, characterized in that: the cold surface (3) is a straight surface, and a bolt hole (7) for installation is formed in the cold surface (3).

7. The crystallizer copper plate of the high-efficiency continuous casting machine according to claim 1, characterized in that: the hot surface (2) is an inner arc surface or an outer arc surface.

8. The crystallizer copper plate of the high-efficiency continuous casting machine according to claim 1, characterized in that: the hot surface (2) is a straight surface, and the side surfaces of the two copper plate bodies (1) with the ports of the transverse cold water holes (4) are arc surfaces or straight surfaces.

9. The crystallizer copper plate of the high-efficiency continuous casting machine according to claim 7 or 8, characterized in that: the transverse cold water hole (4) is a straight hole parallel to the hot surface (2) or an inclined hole with an included angle with the hot surface.

10. The crystallizer copper plate of the high-efficiency continuous casting machine according to claim 9, wherein: the left half hole of the inclined hole is symmetrical to the right half hole of the inclined hole.