Disassembly-free water-cooling heat exchange dry type continuous casting roller
By designing a dry continuous casting roll with a large interference fit and an internal cooling water channel, the problems of poor cooling effect and inconvenient cleaning are solved, achieving efficient cooling and convenient maintenance, and making it suitable for the production of wide and thick slabs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIUZHOU CHUANGKE COMPOSITE METAL CERAMIC PROD CO LTD
- Filing Date
- 2025-05-15
- Publication Date
- 2026-04-14
AI Technical Summary
Existing dry continuous casting rolls have poor cooling performance and are inconvenient to clean. The internal cooling water system is prone to clogging, resulting in high maintenance costs and failing to meet the production needs of large-size steel products.
Design a non-disassembly water-cooled heat exchange dry continuous casting roll, which adopts a water-cooled heat exchanger roll sleeve and mandrel with large interference fit, has internal cooling water channels, and cleaning holes are set on both sides of the roll sleeve. The cooling water circulation path is formed by rotary joints and guide pipes, and cleaning without disassembly is achieved by combining split bearing assembly.
It significantly improves cooling efficiency and equipment lifespan, reduces maintenance costs, ensures unobstructed cooling water channels, and meets the needs of high-efficiency production.
Smart Images
Figure CN224115129U_ABST
Abstract
Description
[Technical Field]
[0001] This utility model relates to the field of steel continuous casting technology, specifically to a water-cooled heat exchange dry continuous casting roll that does not require disassembly. [Background Technology]
[0002] As an important category of steel products, the production technology of heavy slabs is particularly critical, 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] Dry casting rolls do not rely on external water sources for cooling; instead, they achieve surface cooling through an internal cooling structure. This technological innovation effectively reduces the adverse effects of excessively rapid cooling on the cast billet. Furthermore, dry casting rolls can apply a significant reduction to high-temperature cast billets in the secondary cooling zone, which is crucial for addressing internal defects in the billet and improving the mechanical properties of the steel plate. In addition, simulation studies have shown that the cooling method of dry casting rolls can maintain the rolls at a lower temperature without relying on surface water spraying, thereby increasing the roll's service life and reducing the formation of surface cracks on the cast billet.
[0004] Although dry continuous casting rolls are generally considered to have significant advantages in the production of thick slabs, their practical application still faces some technical challenges, preventing their widespread use in practice:
[0005] 1. Poor cooling effect of internal cooling water systems: Currently, many dry continuous casting rolls still rely on complex internal cooling water systems, but their cooling effect is often unsatisfactory, and the production process is relatively complex and costly. Traditional internal cooling water systems typically use spiral grooves machined on the mandrel to form an internal cooling system in conjunction with the roll sleeve. However, this design has a small heat exchange area and is far from the roll surface, resulting in low heat exchange efficiency and making it difficult to effectively meet the production needs of large-size, high-performance steel. In actual use, cooling water still needs to be sprayed on the surface, making true dry use impossible.
[0006] 2. Inconvenient cleaning: If the cooling water circuit is not cleaned, it is easy to cause blockage, which will further reduce the cooling effect. Cleaning the cooling water circuit requires disassembling the entire roller sleeve. If a large interference fit (0.6-0.8mm) is used during installation, it will be almost difficult to disassemble later. If a small interference fit is used, it will increase the risk of leakage during use, increase maintenance costs and downtime.
[0007] These problems limit the application effect of dry continuous casting rolls in actual production. Therefore, developing a dry continuous casting roll that is easy to maintain, has good cooling effect, and does not require disassembly and has water-cooled heat exchange is of great practical significance to the development of the steel industry. [Utility Model Content]
[0008] The purpose of this invention is to address the problems of poor cooling effect of dry continuous casting rolls in thick slab continuous casting technology and the inability to clean the cooling water channels without disassembling the roll sleeve. This invention provides a dry continuous casting roll that does not require disassembly of the water-cooled heat exchanger, thereby improving the cooling effect. The cooling water channels can be cleaned without disassembling the roll sleeve and mandrel, avoiding scale or other obstructions from affecting the water channels and improving the performance and lifespan of the continuous casting roll.
[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0010] A non-disassembly-required water-cooled heat exchange dry continuous casting roll, characterized in that it comprises: N water-cooled heat exchanger roll sleeves, 1 mandrel, 1 rotary joint, 1 guide pipe, N plugs, P split bearing assemblies, and 2 end bearing seat assemblies, wherein P = N-1; the water-cooled heat exchanger roll sleeves are sequentially fitted onto the mandrel, and the roll sleeves and mandrel are installed with a large interference fit seal; each roll sleeve has a cooling water channel on its inner wall extending outwards, and cleaning holes communicating with the cooling water channels are provided on both sides of the roll sleeve, the cleaning holes being provided with removable plugs; the mandrel is a hollow structure, containing the guide pipe, and a receiving space is formed between the outer wall of the guide pipe and the inner wall of the mandrel, the cooling water channel of each roll sleeve being provided with a cooling water channel. The water channel inlet and outlet are both connected to the receiving space; each of the water-cooled heat exchanger roller sleeves has a first through hole and a second through hole on its mandrel, and the first through hole and the second through hole are connected to the receiving space; the guide pipe has a sealing ring at the corresponding position in the middle of each water-cooled heat exchanger roller sleeve, and the sealing ring divides the receiving space into several independent cooling chambers; the receiving space is closed at one end of the mandrel by an end sealing structure, and a rotary joint is installed at the other end of the mandrel. The water inlet of the rotary joint is connected to the inner diameter of the guide pipe, and the water outlet is connected to the receiving space farthest from the water inlet end to form a cooling water circulation path; end bearing seat assemblies are installed at both ends of the mandrel, and split bearing assemblies are installed between adjacent water-cooled heat exchanger roller sleeves.
[0011] In a further optimized manner, the connection between the roller sleeve and the mandrel of the water-cooled heat exchanger is fixed by sealed welding.
[0012] Further optimized, the maximum interference is 0.694-0.786 mm.
[0013] Further optimized, the cleaning hole is a threaded hole, and the removable plug is a matching threaded plug.
[0014] Further optimized, the number of cleaning holes on the same side of each roller sleeve is 4, evenly distributed along the circumference of the roller sleeve.
[0015] In a further optimized version, the surface of the cooling water channel and the accommodating space are all provided with an aluminum-plated anti-rust structural layer.
[0016] In a further optimized configuration, the split bearing assembly includes a bearing housing cover, bearing housing fastening screws, bearing inner ring fastening screws, an upper bearing inner ring, a lower bearing inner ring, and a bearing housing bottom. The bearing housing cover and the bearing housing bottom cooperate with each other and are movably installed using the bearing housing fastening screws. The upper bearing inner ring is located inside the bearing housing cover, and the lower bearing inner ring is located inside the bearing housing bottom. The upper and lower bearing inner rings are mutually fitted onto the shaft core between adjacent roller sleeves and are movably installed using the bearing inner ring fastening screws.
[0017] In a further optimized configuration, the split bearing assembly also includes rollers mounted on the bottom of the bearing housing, and the bearing housing cover has roller grooves that mate with the rollers.
[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:
[0019] 1. This utility model, through innovative design, provides a non-disassembly water-cooled heat exchange dry continuous casting roll. It employs cooling water channels arranged from the inner wall of the roll sleeve outwards, significantly increasing the cooling area compared to machining grooves on the mandrel. This allows for more uniform distribution of coolant across the roll surface, significantly improving cooling efficiency and effectively meeting the production needs of thick slab steel. Furthermore, this utility model allows for cleaning of the cooling water channels without disassembly, preventing scale or other obstructions from affecting the channels and improving the performance and lifespan of the continuous casting roll. Specifically, this utility model utilizes a large interference fit, a split bearing assembly, and cleaning holes. Cleaning only requires disassembling the split bearing assembly to expose the cleaning holes, achieving non-disassembly cleaning of the roll sleeve and mandrel. Given the large interference fit, separating the roll sleeve and mandrel is extremely difficult; this utility model allows for almost non-destructive (without cutting the mandrel) disassembly of the roll sleeve and mandrel, thus greatly reducing maintenance costs.
[0020] 2. The cooling water channel design of this utility model is reasonable. Through the cooperation of rotary joints and guide pipes, it ensures that the cooling medium can flow efficiently through each roller sleeve, thereby significantly improving heat dissipation efficiency. Each roller sleeve is provided with a cleaning hole on its side, allowing for cleaning without disassembling the entire roller sleeve. In addition, the surface of the cooling water channel and the receiving space is provided with an aluminum-plated anti-rust structural layer, effectively preventing rust inside the equipment and improving the durability and reliability of the equipment.
[0021] 3. By employing sealed welding and a large interference fit, the sealing performance of the equipment is further enhanced, ensuring good working condition even under high-temperature environments. This invention provides an efficient, reliable, and easy-to-maintain solution in the field of continuous casting of thick slabs. [Attached Image Description]
[0022] Figure 1 This utility model presents a schematic diagram of a water-cooled heat exchange dry continuous casting roll structure that does not require disassembly.
[0023] Figure 2 This utility model presents a schematic diagram of the dry continuous casting roll sleeve and mandrel after installation.
[0024] Figure 3 This utility model presents a schematic diagram of the radial transverse section structure of one end of the dry continuous casting roll sleeve.
[0025] Figure 4 Figure 3 Schematic diagram of the structure along direction A;
[0026] Figure 5 Schematic diagram of the split bearing assembly structure;
[0027] Figure 6 Schematic diagram of the end bearing housing assembly;
[0028] In the attached diagram, 1-water-cooled heat exchanger roller sleeve, 2-mandrel, 3-end bearing housing assembly, 4-split bearing assembly, 5-guide pipe, 6-plug, 7-rotary joint, 9-accommodating space, 10-end sealing structure, 11-cooling water channel, 21-first through hole, 22-second through hole, 30-cleaning hole, 31-removable plug, 32-bearing housing, 33-bearing, 34-through cover, 41-bearing housing top cover, 42-bearing housing fastening screw, 43-bearing inner ring fastening screw, 44-upper bearing inner ring, 45-lower bearing inner ring, 46-roller, 47-bearing housing bottom.
Detailed Implementation Methods
[0029] 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.
[0030] 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.
[0031] 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.
[0032] Please refer to Figures 1 to 6 .
[0033] Example 1
[0034] Please refer to the attached document. Figure 1-6 ;
[0035] A non-disassembly water-cooled heat exchange dry continuous casting roll includes: N water-cooled heat exchanger roll sleeves 1, 1 mandrel 2, 1 rotary joint 7, 1 guide pipe 5, N plugs 6, P split bearing assemblies 4 and 2 end bearing seat assemblies 3, where P = N-1;
[0036] The water-cooled heat exchanger roller sleeve 1 is sequentially fitted onto the spindle 2. The water-cooled heat exchanger roller sleeve 1 and the spindle 2 are installed with a large interference fit. Each roller sleeve 1 has a cooling water channel 11 on its inner wall towards the outer wall. The roller sleeve 1 has a cleaning hole 30 on both sides that communicates with the cooling water channel 11. The cleaning hole 30 is provided with a removable plug 31.
[0037] The mandrel 2 has a hollow structure and is provided with the flow guide pipe 5 inside. The outer wall of the flow guide pipe 5 and the inner wall of the mandrel 2 form a receiving space 9. The inlet and outlet of the cooling water channel 11 of each roller sleeve 1 are connected to the receiving space 9.
[0038] Each of the water-cooled heat exchanger roller sleeves 1 has a first through hole 21 and a second through hole 22 on the mandrel 2, and the first through hole 21 and the second through hole 22 are connected to the accommodating space 9.
[0039] The guide pipe 5 is provided with a ring of sealing 6 at the corresponding position in the middle of each water-cooled heat exchanger roller sleeve 1, and the sealing 6 divides the accommodating space 9 into several independent cooling chambers.
[0040] The accommodating space 9 is closed at one end of the spindle 2 by the end sealing structure 10, and the other end of the spindle 2 is equipped with a rotary joint 7. The water inlet of the rotary joint 7 is connected to the inner diameter of the guide pipe 5, and the water outlet is connected to the accommodating space 9 furthest from the water inlet end, so as to form a cooling water circulation path.
[0041] The mandrel 2 is equipped with end bearing seat assemblies 3 at both ends, and a split bearing assembly 4 is installed between adjacent water-cooled heat exchanger roller sleeves 1; the connection between the water-cooled heat exchanger roller sleeve 1 and the mandrel 2 is fixed by sealed welding. The cleaning hole 30 is a threaded hole, and the removable plug is a matching threaded plug.
[0042] For optimal cleaning results, each roller sleeve 1 should have four cleaning holes 30 on the same side, evenly distributed along the circumference of the roller sleeve. A single hole can also achieve the cleaning purpose.
[0043] The surface of the cooling water channel 11 and the accommodating space 9 are all provided with an aluminum-plated anti-rust structure layer, which can reduce the deposition of scale and other impurities in the cooling water channel 11, and also effectively reduce the generation of rust, maintaining the unobstructed flow and cooling effect of the cooling water channel 11.
[0044] Furthermore, the cooling water channel 11 provided on the inner wall of the roller sleeve 1 in the direction from the outer wall can be a threaded structure or a series of cooling water channels, and there are guide holes between adjacent channels.
[0045] Furthermore, in this embodiment, the split bearing assembly 4 includes a bearing housing cover 41, bearing housing fastening screws 42, bearing inner ring fastening screws 43, an upper bearing inner ring 44, a lower bearing inner ring 45, and a bearing housing bottom 47. The bearing housing cover 41 and the bearing housing bottom 47 cooperate with each other and are movably installed by the bearing housing fastening screws 42. The upper bearing inner ring 44 is provided inside the bearing housing cover 41, and the lower bearing inner ring 45 is provided inside the bearing housing bottom 47. The upper bearing inner ring 44 and the lower bearing inner ring 45 are mutually fitted onto the shaft core between adjacent roller sleeves 1 and are movably installed by the bearing inner ring fastening screws 43. The split bearing assembly 4 also includes rollers 46, which are installed on the bearing housing bottom 47. The bearing housing cover 41 has roller grooves that cooperate with the rollers 46.
[0046] The end bearing housing assembly 3 of this utility model adopts a conventional bearing housing. See Figure 6It includes a bearing housing 32, a bearing 33, and a cover 34. The bearing 33 is installed inside the bearing housing 32. The cover 34 is fitted onto the spindle 1 and covers the bearing 33 and the bearing housing 32. The cover 34 is connected to the bearing housing 32 by screws.
[0047] During assembly, S1, remove the mandrel and install the roller sleeve 1 at the corresponding position on the mandrel 2; install the end bearing seat assemblies 3 at both ends of the mandrel and install the split bearing assemblies 4 between the roller sleeves to ensure that each roller sleeve 1 and the mandrel 2 are tightly installed with a large interference fit. The interference fit is controlled within the range of 0.6-0.8mm, and preferably within 0.694-0.786mm. This ensures that the roller sleeve and the mandrel are tightly installed after installation, avoiding the impact of shaking on production and reducing the premature retirement of the continuous casting roll due to shaking.
[0048] S2. Next, take out the guide pipe 5. The outer end of the receiving space 9 at the water outlet end of the guide pipe 5 is sealed by the end sealing structure 10, so that the receiving space 9 forms a closed space at both ends. The other end of the spindle 2 is equipped with a rotary joint 7. The water inlet of the rotary joint 7 is connected to the inner diameter of the guide pipe 5, and the water outlet is connected to the receiving space 9 farthest from the water inlet end and discharges the water in the receiving space to form a cooling water circulation path. The rotary joint 7 is sealed to the end side of the receiving space by sealing material, so that water can only be discharged through the water outlet of the rotary joint 7.
[0049] S3. Ensure that the first through hole 21 and the second through hole 22 are connected to the accommodating space 9 and the cooling water passage 11, respectively.
[0050] In use, the rotary joint 7 employs a dual-path design. Cooling water enters from the inlet of the rotary joint 7, passes through the inner cavity of the guide pipe 5, and is delivered to the first receiving space 9 furthest from the rotary joint 7. Subsequently, the cooling water enters the cooling water channel of the first roller sleeve 1 through the first through hole 21, cooling the first roller sleeve. The cooling water flows out from the second through hole 22 of the first roller sleeve and enters the shared chamber of adjacent roller sleeves: the seal 6 in the middle of each roller sleeve 1 divides the receiving space 9 into two independent chambers, with adjacent roller sleeves sharing one chamber (e.g., the rear half of the first roller sleeve's chamber is shared with the front half of the second roller sleeve's chamber). The cooling water then enters the cooling water channel of the second roller sleeve through the first through hole 21, cooling the second roller sleeve... This process is repeated sequentially until the cooling water flows through all roller sleeves, finally reaching the last receiving space furthest from the inlet. The rotary joint 7 is installed on this furthest receiving space, and its outlet is connected to this receiving space to discharge the cooling water from the system. The rotary joint 7 is sealed with a sealing material between itself and the receiving space to ensure that cooling water does not leak.
[0051] During cleaning and maintenance, a split bearing assembly 4 is installed between adjacent water-cooled heat exchanger roller sleeves 1. The split bearing assembly is disassembled, exposing a first cleaning hole and a second cleaning hole on each side of each roller sleeve 1. The cleaning holes are threaded holes, fitted with removable threaded plugs. When cleaning the cooling water passage 11 is required, simply unscrew the threaded plugs, insert a cleaning tool, or inject cleaning medium to clean the cooling water passage 11. This eliminates the need to disassemble the entire roller sleeve 1, achieving the goal of cleaning without disassembly.
[0052] 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 water-cooled heat exchange dry continuous casting roll that does not require disassembly, characterized in that, include: N water-cooled heat exchanger roller sleeves (1), 1 mandrel (2), 1 rotary joint (7), 1 flow guide pipe (5), N plugs (6), P split bearing assemblies (4) and 2 end bearing seat assemblies (3), where P = N-1; The water-cooled heat exchanger roller sleeve (1) is sequentially fitted onto the mandrel (2). The water-cooled heat exchanger roller sleeve (1) and the mandrel (2) are installed with a large interference fit. Each water-cooled heat exchanger roller sleeve (1) has a cooling water channel (11) on its inner wall facing outward. The water-cooled heat exchanger roller sleeve (1) has a cleaning hole (30) on each side that communicates with the cooling water channel (11). The cleaning hole (30) is provided with a removable plug (31). The mandrel (2) is a hollow structure and is provided with the flow guide pipe (5) inside. The outer wall of the flow guide pipe (5) and the inner wall of the mandrel (2) form a receiving space (9). The inlet and outlet of the cooling water channel (11) of each water-cooled heat exchanger roller sleeve (1) are connected to the receiving space (9). Each of the water-cooled heat exchanger roller sleeves (1) has a first through hole (21) and a second through hole (22) on the spindle (2), and the first through hole (21) and the second through hole (22) are connected to the accommodating space (9); the guide pipe (5) has a ring of sealing (6) at the corresponding position in the middle of each water-cooled heat exchanger roller sleeve (1), and the sealing (6) divides the accommodating space (9) into several independent cooling chambers; The accommodating space (9) is closed at one end of the spindle (2) by an end sealing structure (10), and a rotary joint (7) is installed at the other end of the spindle (2). The inlet of the rotary joint (7) is connected to the inner diameter of the guide pipe (5), and the outlet is connected to the accommodating space (9) furthest from the inlet end, so as to form a cooling water circulation path. The mandrel (2) is equipped with end bearing housing assemblies (3) at both ends, and split bearing assemblies (4) are installed between adjacent water-cooled heat exchanger roller sleeves (1).
2. The water-cooled heat exchange dry continuous casting roll that does not require disassembly according to claim 1, characterized in that, The connection between the roller sleeve (1) and the spindle (2) of the water-cooled heat exchanger is fixed by sealed welding.
3. The water-cooled heat exchange dry continuous casting roll that does not require disassembly according to claim 1, characterized in that, The maximum interference fit is 0.694-0.786 mm.
4. The water-cooled heat exchange dry continuous casting roll that does not require disassembly according to claim 1, characterized in that, The cleaning hole (30) is a threaded hole, and the removable plug is a matching threaded plug.
5. A water-cooled heat exchange dry continuous casting roll that does not require disassembly, as described in claim 4, is characterized in that... The number of cleaning holes (30) on the same side of each water-cooled heat exchanger roller sleeve (1) is 4, which are evenly distributed along the circumference of the roller sleeve.
6. The water-cooled heat exchange dry continuous casting roll that does not require disassembly according to claim 1, characterized in that, The surface of the cooling water channel (11) and the accommodating space (9) are all provided with an aluminum-plated anti-rust structure layer.
7. The water-cooled heat exchange dry continuous casting roll that does not require disassembly according to claim 1, characterized in that, The split bearing assembly (4) includes a bearing housing cover (41), bearing housing fastening screws (42), bearing inner ring fastening screws (43), upper bearing inner ring (44), lower bearing inner ring (45), and bearing housing bottom (47). The bearing housing cover (41) and the bearing housing bottom (47) are fitted together and are movable by bearing housing fastening screws (42); the bearing housing cover (41) is provided with an upper bearing inner ring (44) and the bearing housing bottom (47) is provided with a lower bearing inner ring (45). The upper bearing inner ring (44) and the lower bearing inner ring (45) are fitted together and installed on the shaft core between adjacent water-cooled heat exchanger roller sleeves (1) and are movable by bearing inner ring fastening screws (43).
8. A water-cooled heat exchange dry continuous casting roll that does not require disassembly, as described in claim 7, is characterized in that... The split bearing assembly (4) also includes rollers (46) mounted on the bottom (47) of the bearing housing, and the bearing housing cover (41) has roller grooves that cooperate with the rollers (46).