Dry continuous casting roller assembly water-cooled heat exchanger type roller sleeve

Abstract

The utility model relates to the technical field of steel plate production and continuous casting, in particular to a water-cooled heat exchanger type roller sleeve assembled on a dry continuous casting roller, which mainly solves the problems of low cooling efficiency, non-uniform cooling, unreasonable cooling waterway design and the like in the wide and thick plate blank production process of the existing cooling system. The dry-type continuous casting roller-mounted water-cooled heat exchanger comprises a mandrel, a plurality of roller sleeves, a flow guide pipe fitting, a heat dissipation cooling groove, a plug and a plurality of through holes, according to the design of the dry-type continuous casting roller-mounted water-cooled heat exchanger, a plurality of containing spaces are formed in the roller sleeves, cooling water is guided to flow through the flow guide pipe fitting, and the cooling water sequentially flows in the containing spaces and exchanges heat with the heat dissipation cooling groove; therefore, the surface temperature of the roller sleeve is uniformly reduced. The cooling device has a good cooling effect, is particularly suitable for continuous casting production of large-specification wide and thick slabs, and can remarkably improve the production stability and reduce the defects of surface cracks, poor slab shapes and the like.

Description

Technical Field

[0001] This utility model relates to the field of continuous casting technology for steel plate production, specifically to a dry continuous casting roll assembly with a water-cooled heat exchanger type roll sleeve. Background Technology

[0002] With the continuous development of my country's shipbuilding, wind power, and other industries, the demand for high-performance steel is increasing, especially for heavy slabs. As an important category of steel products, the production technology of heavy slabs is particularly crucial, with continuous casting technology playing a vital role in the production process. Continuous casting technology for heavy slabs not only improves the adaptability of steel production, especially meeting the high requirements of special fields, but also effectively increases production efficiency. The continuous development of continuous casting technology is of great significance for improving the automation level and product quality of steel production.

[0003] Continuous casting technology is a crucial step in the production of thick slabs, especially given the increasing demand for high-performance steel in industries such as shipbuilding and wind power. This presents numerous challenges to the production technology of thick slabs. As slab thickness increases, the problems encountered by traditional continuous casting technology become increasingly complex. Particularly in the continuous casting of thick slabs, the cooling efficiency of the casting rolls, the reliability of the sealing system, and the achievement of dry cooling effects have become key areas of research and application. The following are the key technical issues:

[0004] 1. Insufficient Cooling Effect: Although the traditional dry continuous casting roll design reduces the need for cooling water, the low efficiency of the cooling system, especially in the production of large and thick slabs, still results in uneven cooling rates and poor cooling effects. The dry cooling system design struggles to effectively address the high-temperature cooling demands of thick slabs during continuous casting, leading to uneven temperature distribution on the roll surface. This, in turn, affects the quality of the cast slab, resulting in defects such as surface cracks and poor slab shape.

[0005] 2. Inadequate Cooling Water Channel Design: Traditional continuous casting rolls, such as those described in patent publication number CN113560512B, generally employ internal cooling water channels machined on the mandrel to achieve cooling. However, existing cooling water channels are far from the roll surface, and the water flow is limited. This is especially true for larger diameter continuous casting rolls, where the heat exchange area of ​​the water channels is small, making it difficult to meet the cooling capacity requirements of high-temperature production processes. Furthermore, small cooling water channels are prone to scale buildup, resulting in significant water pressure loss, further affecting the performance of the continuous casting rolls and the stability of the production line.

[0006] 3. Dry cooling is not fully realized: Although some designs attempt to reduce the use of cooling water and achieve dry cooling, current technologies have not yet fully realized efficient dry cooling. Existing dry-cooled continuous casting rolls still rely on external cooling methods such as continued water spraying on the roll surface, which prevents the full realization of the advantages of dry cooling technology in energy saving, improving production efficiency, and enhancing cooling effect. Therefore, dry cooling systems are still difficult to apply in the production of some high-specification, thick slabs, failing to solve the problems of insufficient cooling precision and efficiency.

[0007] Therefore, these technical challenges prevent traditional cooling systems from meeting the high-precision requirements for cooling effect, cooling rate, and temperature control in the production of large and thick slabs. Consequently, there is an urgent need to develop a dry-type continuous casting roll-mounted water-cooled heat exchanger capable of achieving efficient and uniform cooling, suitable for the production of large-size, thick slabs. Utility Model Content

[0008] The purpose of this invention is to address the problems of insufficient cooling effect, unreasonable cooling water circuit design, and incomplete realization of dry cooling in the existing technology. This invention provides a dry continuous casting roll assembly with a water-cooled heat exchanger type roll sleeve. It aims to improve cooling efficiency and heat exchange efficiency through innovative internal cooling structure design, solve the technical problem that the existing cooling system cannot meet the poor cooling effect in the production process of wide and thick slabs, achieve the technical effect of improving cooling efficiency and realizing efficient dry cooling, ensure uniform roll surface temperature and stable slab surface quality, thereby improving the production efficiency and product quality of wide and thick slabs.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A dry continuous casting roll assembly with a water-cooled heat exchanger type roll sleeve includes:

[0011] The mandrel described has a hollow structure;

[0012] The N roller sleeves are hollow and are sequentially fitted onto the mandrel.

[0013] The flow guide fitting is located inside the mandrel;

[0014] The accommodating space is the gap between the outer wall of the guide tube and the inner wall of the mandrel;

[0015] The heat dissipation and cooling tank is located on the inner wall of the roller sleeve towards the outer wall, and can allow cooling water to pass through;

[0016] The Q-type sealing blocks divide the accommodating space covered by the assembled roller set into multiple accommodating spaces;

[0017] Each of the roller sets, after assembly, has a first through hole and a second through hole on the mandrel that is covered by the roller set. The first through hole and the second through hole are respectively connected to the receiving space and the heat dissipation cooling groove.

[0018] In a further optimization, a dual-circuit rotary joint is installed at one end of the flow guide pipe; the outlet of the dual-circuit rotary joint is connected to the accommodating space at one end, and the inlet of the dual-circuit rotary joint is connected to the inner diameter of the flow guide pipe.

[0019] In a further optimized configuration, the accommodating space is closed at both ends of the mandrel covered by each roller sleeve.

[0020] In a further optimization, a dual-circuit rotary joint is installed at one end of the flow guide pipe; the outlet of the dual-circuit rotary joint is connected to the accommodating space at one end, and the inlet of the dual-circuit rotary joint is connected to the inner diameter of the flow guide pipe.

[0021] In a further optimized configuration, the cooling water enters the space furthest from the dual-path rotary joint through the inlet of the guide pipe, then enters the heat dissipation cooling tank through the first through hole, where it exchanges heat with the roller sleeve. After that, it enters the next space through the second through hole, and so on, until it enters the space closest to the dual-path rotary joint, and then is discharged through the outlet of the dual-path rotary joint.

[0022] In a further optimized configuration, Q=N, each roller sleeve has a blockage in its accommodating space, and the accommodating spaces between adjacent roller sleeves are interconnected, thus enabling the transmission of cooling water between adjacent roller sleeves.

[0023] Further optimized, the heat dissipation cooling groove has a spiral structure.

[0024] In a further optimized configuration, the heat dissipation cooling groove is an axial collecting groove structure, which includes: two collecting grooves respectively disposed at both ends of the roller sleeve, and several connecting grooves respectively connecting the two collecting grooves; and a first through hole connected to one of the collecting grooves and a second through hole connected to the other collecting groove, wherein the collecting groove is a groove for collecting cooling medium;

[0025] In a further optimized configuration, the heat dissipation cooling tank is an intermittent water tank structure. The intermittent water tank structure includes several water collection tanks and several cylindrical water tanks arranged at intervals. The water collection tank is a circular groove used to collect the cooling medium. The cylindrical water tanks are provided with several concave water channels at intervals along the axis of the roller sleeve. The cooling medium between adjacent water channels is connected through the concave water channels. The concave water channels of adjacent cylindrical water tanks are not on the same axis. In the same roller sleeve, the intermittent water tank structure starts with one collection tank connected to the first through hole and ends with another collection tank connected to the second through hole.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0027] 1. This utility model provides a dry continuous casting roll assembly with a water-cooled heat exchanger type roll sleeve. Through innovative design, it effectively solves the technical problems of insufficient cooling effect, unreasonable cooling water circuit design, and incomplete realization of dry cooling in the continuous casting process of wide and thick slabs. It can achieve efficient and uniform cooling effect, which is of great significance for improving the temperature control accuracy and product quality in the casting process of wide and thick slabs.

[0028] 2. Compared with traditional dry cooling technology, the heat exchanger of this invention can more efficiently remove heat from the surface of the continuous casting roll by optimizing the heat exchange area and the flow path of the cooling medium. This avoids uneven roll surface temperature and billet quality problems caused by uneven cooling rate, significantly improves cooling efficiency, and ensures stability and quality in the production process of thick slabs.

[0029] 3. This utility model adopts a brand-new cooling water circuit design, which increases the heat exchange area and optimizes the layout of the water flow channels, enabling the cooling water to contact the roller surface more effectively. By improving the water circuit design, not only is the heat exchange efficiency improved, but problems such as insufficient cooling water flow and scale formation are also avoided, effectively preventing poor cooling effect caused by water pressure loss, and further enhancing the stability of the production line.

[0030] 4. This invention achieves highly efficient dry cooling by integrating a high-efficiency heat exchanger and optimized roller surface cooling technology. The heat exchanger enables efficient heat transfer, avoiding the shortcomings of traditional dry cooling systems that rely on external cooling methods (such as water spraying). This design not only saves water resources but also improves the uniformity and precision of cooling, making it particularly suitable for the production needs of large-format, thick slabs. Attached Figure Description

[0031] Figure 1 A schematic diagram of the structure of a preferred embodiment of the present invention;

[0032] Figure 2 A cross-sectional view along the axial direction after installation of a preferred embodiment of this utility model;

[0033] Figure 3 A schematic diagram of another preferred embodiment of the present invention;

[0034] In the attached diagram, 1-roller sleeve, 2-mandrel, 3-guide tube, 6-heat dissipation and cooling tank, 7-accommodating space, 8-blocking, 21-first through hole, 22-second through hole, 23-water collection tank, 24-cylindrical water tank, 25-concave water channel. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] Please refer to the accompanying drawings of the embodiments of this utility model.

[0039] Example 1

[0040] A dry continuous casting roll assembly with a water-cooled heat exchanger type roll sleeve includes:

[0041] A mandrel 2, wherein the mandrel 2 has a hollow structure;

[0042] N roller sleeves 1, wherein the roller sleeves 1 are hollow, and the roller sleeves 1 are sequentially fitted onto the mandrel 2;

[0043] The flow guide tube 3 is disposed inside the mandrel 2;

[0044] The accommodating space 7 is the gap between the outer wall of the guide tube 3 and the inner wall of the spindle 2.

[0045] The heat dissipation and cooling tank 6 is located on the inner wall of the roller sleeve 1 in the direction from the outer wall, and can allow cooling water to pass through.

[0046] Q sealing blocks 8, wherein the sealing blocks 8 divide the accommodating space 7 covered by the roller sleeve 1 after assembly into multiple accommodating spaces 7;

[0047] The first through hole 21 and the second through hole 22 are respectively provided on the mandrel 2 covered by each roller sleeve 1 after assembly. The first through hole 21 and the second through hole 22 are respectively connected to the accommodating space 7 and the heat dissipation cooling groove 6.

[0048] In a further optimized embodiment, a dual-path rotary joint is installed at one end of the flow guide pipe 3; the outlet of the dual-path rotary joint is connected to the one-end accommodating space 7, and the inlet of the dual-path rotary joint is connected to the inner diameter of the flow guide pipe 3.

[0049] In a further optimized embodiment, the accommodating space 7 is closed at both ends of the mandrel 2 covered by each roller sleeve.

[0050] In a further optimized embodiment, a dual-path rotary joint is installed at one end of the flow guide pipe 3; the outlet of the dual-path rotary joint is connected to the one-end accommodating space 7, and the inlet of the dual-path rotary joint is connected to the inner diameter of the flow guide pipe 3.

[0051] In a further optimized scheme in this embodiment, the cooling water enters the receiving space 7 furthest from the dual-path rotary joint through the inlet of the guide pipe 3, enters the heat dissipation cooling tank 6 through the first through hole 21, exchanges heat with the roller sleeve 1 through the heat dissipation cooling tank 6, and then enters the next receiving space 7 through the second through hole 22. This process is repeated until the water enters the receiving space 7 closest to the dual-path rotary joint, and then is discharged through the outlet of the dual-path rotary joint.

[0052] In the further optimized scheme of this embodiment, Q=N, each roller sleeve 1 has a blockage 8 in the accommodating space 7, and the accommodating spaces 7 between adjacent roller sleeves 1 are connected to realize the transmission of cooling water between adjacent roller sleeves 1.

[0053] In this further optimized embodiment, the heat dissipation cooling groove 6 has a spiral structure.

[0054] In the further optimized scheme of this embodiment, the heat dissipation cooling groove 6 is an axial collection groove structure. The axial collection groove structure includes: two collection grooves, respectively disposed at both ends of the roller sleeve 1, and several connecting grooves, respectively connecting the two collection grooves; and the first through hole 21 is connected to one of the collection grooves, and the second through hole 22 is connected to the other collection groove. The collection groove is a groove used to collect the cooling medium.

[0055] In this further optimized embodiment, the heat dissipation cooling tank 6 is an interval water tank structure. The interval water tank structure includes: several water collection tanks 23 and several cylindrical water tanks 24 spaced apart. The water collection tank is a ring of grooves for collecting cooling medium. The cylindrical water tanks 24 are spaced apart along the axis of the roller sleeve with several concave water channels 25. The cooling medium between adjacent water channels is connected through the concave water channels 25. The concave water channels 25 of adjacent cylindrical water tanks are not on the same axis. The interval water tank structure in the same roller sleeve 1 starts with one collection tank connected to the first through hole 21 and ends with another collection tank connected to the second through hole 22.

[0056] This utility model discloses a dry continuous casting roll-mounted water-cooled heat exchanger. Through a precisely designed structure and advanced heat exchange principle, it optimizes the shortcomings of traditional cooling technology, aiming to improve the cooling efficiency of continuous casting rolls and achieve efficient and uniform cooling in the production of thick slabs. Its working principle is summarized as follows:

[0057] Cooling water enters the guide pipe 3 through a dual-path rotary joint and flows into the receiving space 7 inside the roller sleeve 1 through the channel within the guide pipe 3. The cooling water flows sequentially between the receiving spaces 7 and enters the heat dissipation cooling tank 6 through the first through hole 21. Inside the heat dissipation cooling tank 6, the cooling water exchanges heat with the surface of the roller sleeve 1. The structure of the heat dissipation cooling tank 6 effectively increases the contact area between the cooling water and the roller sleeve surface, ensuring the high efficiency of the cooling process. After heat exchange, the temperature of the cooling water decreases.

[0058] After heat exchange, the cooling water enters the next receiving space 7 through the second through hole 22 to continue heat exchange. This process continues until the cooling water eventually flows into the receiving space 7 closest to the dual-path rotary joint and is discharged from the outlet of the rotary joint, completing one cooling cycle.

[0059] Between each roller sleeve 1, a sealing block 8 is used to divide the accommodating space 7, allowing cooling water to be transferred between each roller sleeve 1 while ensuring that the cooling effect inside each roller sleeve 1 is independent and uniform. The flow of cooling water between multiple roller sleeves 1 is achieved through the interconnected accommodating spaces 7, further improving the overall efficiency of the cooling system.

[0060] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A dry continuous casting roll assembly with a water-cooled heat exchanger type roll sleeve, characterized in that, include: A mandrel (2), wherein the mandrel (2) has a hollow structure; N roller sleeves (1), wherein the roller sleeves (1) are hollow and are sequentially fitted onto the mandrel (2); A flow guide pipe (3) is disposed inside the mandrel (2); The accommodating space (7) is the gap between the outer wall of the guide tube (3) and the inner wall of the mandrel (2); A heat dissipation cooling tank (6) is provided on the inner wall of the roller sleeve (1) in the direction from the outer wall, and cooling water can pass through it; Q seals (8), the seals (8) dividing the accommodating space (7) covered by the roller sleeve (1) after assembly into multiple accommodating spaces (7); The first through hole (21) and the second through hole (22) are respectively provided on the mandrel (2) covered by each roller sleeve (1) after assembly. The first through hole (21) and the second through hole (22) are respectively connected to the accommodating space (7) and the heat dissipation cooling groove (6).

2. The dry continuous casting roll assembly water-cooled heat exchanger type roll sleeve according to claim 1, characterized in that, One end of the flow guide pipe (3) is equipped with a double-circuit rotary joint; the outlet of the double-circuit rotary joint is connected to the one-end accommodating space (7), and the inlet of the double-circuit rotary joint is connected to the inner diameter of the flow guide pipe (3).

3. The dry continuous casting roll assembly water-cooled heat exchanger type roll sleeve according to claim 2, characterized in that, The accommodating space (7) is closed at both ends of the mandrel (2) covered by each roller sleeve.

4. The dry continuous casting roll assembly water-cooled heat exchanger type roll sleeve according to claim 1, characterized in that, One end of the flow guide pipe (3) is equipped with a double-circuit rotary joint; the outlet of the double-circuit rotary joint is connected to the one-end accommodating space (7), and the inlet of the double-circuit rotary joint is connected to the inner diameter of the flow guide pipe (3).

5. A dry continuous casting roll assembly with a water-cooled heat exchanger type roll sleeve according to claim 4, characterized in that, The cooling water enters the receiving space (7) furthest from the dual-path rotary joint through the inlet of the guide pipe (3), enters the heat dissipation cooling tank (6) through the first through hole (21), and exchanges heat with the roller sleeve (1) through the heat dissipation cooling tank (6). Then it enters the next receiving space (7) through the second through hole (22). This process is repeated until it enters the receiving space (7) closest to the dual-path rotary joint, and then it is discharged through the outlet of the dual-path rotary joint.

6. A dry continuous casting roll assembly with a water-cooled heat exchanger type roll sleeve according to claim 2, characterized in that, Q=N, each roller sleeve (1) covers a containment space (7) with a blockage (8), and the containment spaces (7) between adjacent roller sleeves (1) are connected to realize the transmission of cooling water between adjacent roller sleeves (1).

7. A dry continuous casting roll assembly with a water-cooled heat exchanger type roll sleeve according to claim 1, characterized in that, The heat dissipation cooling groove (6) has a spiral structure.

8. A dry continuous casting roll assembly with a water-cooled heat exchanger type roll sleeve according to claim 1, characterized in that, The heat dissipation cooling groove (6) is an axial collection groove structure. The axial collection groove structure includes: two collection grooves, which are respectively set at both ends of the roller sleeve (1); several connecting grooves, which are respectively connected to the two collection grooves; and the first through hole (21) is connected to one of the collection grooves and the second through hole (22) is connected to the other collection groove. The collection groove is a groove used to collect the cooling medium.

9. A dry continuous casting roll assembly with a water-cooled heat exchanger type roll sleeve according to claim 1, characterized in that, The heat dissipation cooling tank (6) is an interval water tank structure. The interval water tank structure includes several water collection tanks (23) and several cylindrical water tanks (24) arranged at intervals. The water collection tank is a ring of grooves used to collect cooling medium. The cylindrical water tanks (24) are arranged at intervals along the axis of the roller sleeve with several concave water channels (25). The cooling medium between adjacent water channels is connected through the concave water channels (25). The concave water channels (25) of adjacent cylindrical water tanks are not on the same axis. In the same roller sleeve (1), the interval water tank structure starts with one collection tank and the collection tank is connected to the first through hole (21), and ends with another collection tank and the collection tank is connected to the second through hole (22).

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