Dry continuous casting roller for continuous casting of wide and thick slabs

Abstract

The utility model relates to the technical field of steel plate production and continuous casting, in particular to a dry continuous casting roller for continuous casting of wide and thick slabs. The continuous casting roller comprises N roller sleeves, a core shaft, a flow guide pipe fitting, P key group components and M bearing seat assemblies, the roller sleeve is of a hollow structure, and a heat dissipation cooling groove is formed in the inner wall and allows a cooling medium to pass through. The mandrel is of a hollow structure, a flow guide pipe fitting is arranged in the mandrel, the bearing seat assembly is installed between the two ends of the mandrel and the roller sleeve, a key groove is formed in the roller sleeve, the key set component is installed in the key groove, and the plug can separate the containing space in the mandrel. The cooling device is suitable for continuous casting of wide and thick steel slabs, the cooling effect can be improved, liquid leakage is avoided in the using process, the maintenance cost is reduced, and the production efficiency and the product quality of the wide and thick slabs are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of steel plate production continuous casting technology, specifically relates to a kind of dry continuous casting roller for wide slab continuous casting.

BACKGROUND

[0002] With the continuous development of China's shipbuilding industry, wind power manufacturing industry and other industries, the demand for high-performance steel is increasing, especially the demand for wide slab is increasing. As an important category of steel products, the production technology of wide slab is particularly critical, and continuous casting technology plays a crucial role in the production process of wide slab. Continuous casting technology not only improves the adaptability of steel production, especially to meet the high requirements of steel in special fields, but also effectively improves the production efficiency. The continuous development of continuous casting technology has great significance to improve the automation level and product quality of steel production.

[0003] However, with the increase of slab thickness, the technical challenges in the continuous casting process of wide slab are also increasing. The traditional continuous casting technology cannot simply increase the width of continuous casting roller to solve the problem, and the thickening of slab brings many technical problems:

[0004] 1. Difficulty of straightening increases: with the increase of slab thickness, its deformation, strength and hardness increase, and the difficulty of straightening process increases significantly. Especially in the late cooling stage, thicker slab may cause higher stress and hardness, increasing the mechanical burden in the straightening process.

[0005] 2. Difficulty of cooling speed control increases: the cooling speed of thick slab directly affects the microstructure and final performance of steel plate. Too fast cooling speed may cause excessive internal stress of slab, thereby causing cracks or affecting its strength and toughness. Therefore, how to effectively control the cooling speed to ensure product quality has become a major challenge.

[0006] 3. Increased wear of rollers: thick slab wears the continuous casting roller more seriously, especially in the area where the roller surface contacts the cast slab, the wear problem is more prominent. Roller wear not only directly affects the service life of the roller, but also may cause the surface quality of the cast slab to decrease, increasing the maintenance frequency and cost in the production process.

[0007] Based on these technical challenges, straightening and horizontal stage in wide slab production need to reduce or cancel the use of spray water to improve slab quality and hot delivery rolling efficiency. Dry continuous casting roller is one of the solutions, which can effectively reduce the stress problem caused by too fast cooling speed, and avoid the cracks that may be caused by traditional water cooling method, while reducing environmental pollution in the production process.

[0008] Dry-type continuous casting roller does not rely on external water source for cooling, but through the internal cooling structure design to achieve the roller surface cooling, this technical innovation can effectively reduce the adverse effects of rapid cooling on the billet. Further, dry-type continuous casting roller can apply a larger reduction to high-temperature billets in the secondary cooling zone, which is crucial to solve the internal defects of the billet and improve the mechanical properties of the steel plate. In addition, through simulation research, the cooling method of dry-type continuous casting roller can keep the roller working at a lower temperature, thereby improving the service life of the roller and reducing the generation of surface cracks of the billet.

[0009] Although dry-type continuous casting roller is generally considered to have significant advantages in wide slab production, its actual application still faces some technical problems:

[0010] 1. Poor cooling effect of internal cooling water system: Currently, many dry-type continuous casting rollers still rely on complex internal cooling water systems, but the cooling effect is often not ideal, and the production process is more complex and the cost is higher. Traditional internal cooling water system usually adopts spiral groove machining on the mandrel to form an internal cooling system with the roller sleeve. However, the heat exchange area of this design is small and far away from the roller surface, resulting in low heat exchange efficiency, which is difficult to effectively meet the production needs of large-scale, high-performance steel materials.

[0011] 2. Insufficient sealing system design: The sealing system of dry-type continuous casting roller has obvious deficiencies. In actual use, the assembly gap between the roller sleeve and the mandrel may cause periodic shaking during operation, which causes the sealing ring on the guide ring to fail prematurely, resulting in serious water leakage. This not only reduces the sealing effect, but also may cause uneven cooling, affecting the working performance and service life of the roller.

[0012] 3. Mandrel and roller sleeve fitting problem: The fitting precision of the mandrel and the roller sleeve is high, and the traditional interference fit (0.694-0.786mm) assembly is difficult, and after assembly, it cannot be disassembled. In the process of roller use, once damage or repair is needed, the repair difficulty is extremely great, often need to cut off the mandrel and use special equipment to disassemble, resulting in high repair cost, and the mandrel often cannot be reused.

[0013] 4. "Dry" effect not fully realized: Although dry-type continuous casting roller does not have external cooling water in design, in the actual production process, due to insufficient heat dissipation, water cooling is still needed for the roller surface. This not only increases energy consumption, but also fails to fully realize the advantages of dry-type continuous casting roller in energy saving and improving production efficiency.

[0014] For example, in the patent with the patent publication number CN113560512B, an internal cooling water path design is adopted, although this design attempts to solve the above problems, but still has the following shortcomings: the cooling system design of the spiral groove and the roller sleeve has small heat exchange area and is far from the roller surface, resulting in poor heat exchange efficiency, which cannot meet the high-efficiency cooling demand of the thick slab. The assembly structure of this patent is complex, the interference assembly of the roller sleeve and the mandrel is difficult, and once the assembly is completed, it is difficult to disassemble, affecting the later maintenance and repair. Due to the imperfect design of the water cooling system, the selection of the interference assembly amount is very critical. If the interference assembly amount is too large, it will cause disassembly and scale accumulation. If the interference amount is too small, it may cause water leakage of the water cooling system.

[0015] Therefore, how to ensure the efficient work of the dry continuous casting roller while improving the cooling efficiency, reducing the maintenance cost and improving the product quality has become a technical problem to be solved in the current thick slab production field.

Utility model content

[0016] The utility model discloses a dry continuous casting roller for thick slab continuous casting, which aims to improve the cooling effect, prevent liquid leakage during use, reduce maintenance cost, and improve the production efficiency and product quality of thick slabs.

[0017] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0018] A dry continuous casting roller for thick slab continuous casting, comprising N roller sleeves, a mandrel, a flow guide pipe, P key group components and M bearing seat assemblies; the roller sleeves are sequentially sleeved on the mandrel, the roller sleeves are hollow, the inner wall of the roller sleeve is provided with a heat dissipation cooling groove in the direction of the outer wall, and the heat dissipation cooling groove can pass cooling medium; the mandrel is a hollow structure, and a flow guide pipe is arranged in the mandrel; each roller sleeve covers a first through hole and a second through hole on the mandrel, and the first through hole and the second through hole are respectively connected with the accommodating space and the heat dissipation cooling groove; the accommodating space is closed at both ends of the mandrel, and a ring-shaped block is arranged on the flow guide pipe at the corresponding position of the middle part of each roller sleeve, so as to separate the accommodating space; each roller sleeve covers a key groove on the mandrel, and each roller sleeve is provided with two key grooves at the corresponding position; the key group component is installed in the key groove; the bearing seat assembly is installed between the two ends of the mandrel and the adjacent roller sleeves.

[0019] Further optimization, spiral structure, axial collection groove structure, interval water groove structure;

[0020] The axial collection groove structure comprises two collection grooves respectively arranged at two ends of the roller sleeve 13, a plurality of connection grooves respectively connecting the two collection grooves, and the first through hole 21 is connected with one of the collection grooves and the second through hole 22 is connected with the other collection groove, and the collection groove is a groove for collecting cooling medium.

[0021] The interval water tank structure comprises a plurality of water collection grooves and a plurality of columnar water tanks arranged at intervals, the water collection groove is a groove for collecting cooling medium, and the columnar water tank is arranged at intervals along the axis direction of the roller sleeve, the cooling medium between adjacent water channels is communicated through the concave water channel, the concave water channels of adjacent columnar water tanks are not on the same axis, and the interval water tank structure in the same roller sleeve starts with one collection groove connected with the first through hole and ends with another collection groove connected with the second through hole.

[0022] Further optimization, the heat dissipation cooling tank can also have the following structure: two collection grooves respectively arranged at two ends of the roller sleeve, a plurality of connection grooves respectively connecting the two collection grooves, and the first through hole is connected with one of the collection grooves and the second through hole is connected with the other collection groove.

[0023] Further optimization, the number relationship is as follows: P=2N, M=N+1, the number of plugging is Q, Q=N.

[0024] Further optimization, the key groove is a semicylindrical shape and the centers of the semicylindrical shapes are on the same axis.

[0025] Further optimization, the key groove bottom is further provided with a mounting hole, and the key group component comprises a cylindrical key body, a bolt through hole, a bolt hole recess, two groups of sealing assemblies and a countersunk bolt, the bolt through hole penetrates through the cylindrical key body and is connected with the mounting hole, the bolt hole recess is arranged on the bolt through hole away from the key groove, the two groups of sealing assemblies are arranged on the key body on both sides of the bolt hole recess, and the countersunk bolt is installed in the bolt through hole and the mounting hole.

[0026] Further optimization, each group of sealing assemblies comprises a sealing groove and a sealing ring, the sealing groove comprises a first sealing groove and a second sealing groove, the sealing ring comprises a first sealing ring and a second sealing ring, the first sealing ring is installed in the first sealing groove, and the second sealing ring is installed in the second sealing groove.

[0027] Further optimization, one end of the flow guide pipe is provided with a double-way rotary joint, the water outlet of the double-way rotary joint is communicated with the one end containing space, and the water inlet of the double-way rotary joint is communicated with the inner diameter of the flow guide pipe.

[0028] Further optimization, one end of the guide pipe is provided with a double-way rotary joint, and a pipe water outlet hole is arranged on the guide pipe away from the double-way rotary joint; the double-way rotary joint water inlet communicates with the one end containing space, the pipe water outlet hole communicates with the other end containing space, and the double-way rotary joint water outlet communicates with the guide pipe inner diameter.

[0029] In summary, due to the adoption of the above technical scheme, the beneficial effects of the utility model are:

[0030] 1. The utility model discloses an improved cooling system design, the utility model discloses a heat sink cooling groove is arranged in the roller cover, so that the cooling liquid can be more evenly distributed in the roll surface, the cooling effect is improved significantly, and the production demand of wide and thick slab steel is effectively satisfied. The dry continuous casting roller of the utility model is significantly enhanced in high-temperature resistance, which slows down the wear rate of the roller during high-temperature continuous casting, thereby prolonging the service life of the continuous casting roller, reducing the frequency of maintenance and replacement, and significantly reducing the maintenance cost in production. It is not necessary to spray water cooling on the surface to reduce the generation of slab surface cracks, and the production is more environmentally friendly.

[0031] 2. The utility model discloses an innovative key assembly component and key groove design, the key assembly component provided by the utility model has the dual functions of transmission torque connection and sealing cooling liquid, which is an innovative design not seen in the prior art. By adopting key assembly components of different pressure grades (low pressure, high pressure and superhigh pressure), the actual demand can be flexibly adjusted, providing more stable power transmission and more efficient cooling liquid sealing for the continuous casting roller, ensuring the stability of the cooling system and avoiding cooling liquid leakage.

[0032] The utility model optimizes the cooperation mode of the mandrel and the roller cover, adopts a unique semicircular key groove and small interference fit, avoids the complexity and precision problem of the mandrel segmented assembly in the prior art, and reduces the difficulty of the mandrel in the machining process. Compared with the traditional segmented assembly mandrel, the mandrel structure of the utility model is more stable, can bear high load under severe working conditions, and avoids the deformation and fracture risk caused by multi-section assembly.

[0033] 3. In the cooperation of the roller cover and the mandrel, the utility model adopts the small interference fit and the innovative key group component design to ensure the efficient and stable power transmission between the roller core and the roller cover, and effectively prevent the cooling liquid from leaking. In addition, this optimized design also makes the power transmission of the roller more stable and reliable, reduces the mechanical wear, and prolongs the service life of the equipment. The semicircular key groove is arranged at the cooperation part of the roller cover and the mandrel, and each roller cover is equipped with a concentric key groove design. Such design not only ensures the close cooperation between the roller core and the roller cover, but also makes the disassembly process more convenient. Especially in the repair process after the continuous casting roller is retired, the small interference fit realizes easier disassembly and reassembly compared with the large interference fit of the prior art, and the utility model sets the heat dissipation cooling groove on the roller cover. It is very easy to clean the water scale and other things after disassembly, and the maintenance is simple and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 The structure schematic view of a preferred embodiment of the utility model;

[0035] Figure 2 The structure schematic view of another preferred embodiment of the utility model;

[0036] Figure 3 The axial direction section view of one of the roller covers of the utility model after installation;

[0037] Figure 4 The structure schematic view of the key group component of the utility model;

[0038] Figure 5 The schematic view of a preferred embodiment of the utility model after installation;

[0039] Figure 6 The structure schematic view of a preferred embodiment of the heat dissipation cooling groove of the utility model;

[0040] In the drawings, 1-roller cover, 2-mandrel, 3-flow guide pipe, 4-bearing seat assembly, 5-key group component, 6-heat dissipation cooling groove, 7- containing space, 8-plugging, 21-first through hole, 22-second through hole, 23-water collection groove, 24-cylindrical water tank, 25-concave water channel, 9-key groove, 10-mounting hole, 51-cylindrical key body, 52-bolt through hole, 53-bolt hole recess, 8-counter sunk bolt, 544-first sealing groove, 545-second sealing groove, 546-first sealing ring, 547-second sealing ring, 19-double rotary joint.

DETAILED DESCRIPTION

[0041] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0042] It should be noted that when a component is referred to as being "on" another component, it can be directly on the other component or intervening components can also be present. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or intervening components can also be present. When a component is referred to as being "disposed on" another component, it can be directly disposed on the other component or intervening components can also be present. The terms "vertical", "horizontal", "left", "right", and similar terms used herein are for illustrative purposes only.

[0043] 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 application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0044] Reference is made to the drawings of the embodiments of the present application.

[0045] Embodiment 1

[0046] A dry continuous casting roller for wide and thick slab continuous casting comprises N roller sleeves 1, a core shaft 2, a flow guide pipe 3, P key group components 5 and M bearing seat assemblies 4. The roller sleeves 1 are sequentially sleeved on the core shaft 2. The roller sleeves 1 are hollow and provided with heat dissipation cooling grooves 6 on the inner wall to the outer wall. The heat dissipation cooling grooves 6 can pass cooling medium. The core shaft 2 is hollow and provided with the flow guide pipe 3. The outer wall of the flow guide pipe 3 and the inner wall of the core shaft 2 form a containing space 7. The core shaft 2 covered by each roller sleeve 1 is respectively provided with a first through hole 21 and a second through hole 22. The first through hole 21 and the second through hole 22 are respectively connected with the containing space 7 and the heat dissipation cooling grooves 6. The containing space 7 is closed at both ends of the core shaft 2. The flow guide pipe 3 at the corresponding position of the middle part of each roller sleeve 1 is further provided with a ring-shaped plugging 8. The plugging 8 can separate the containing space 7. The core shaft 2 covered by each roller sleeve 1 is further provided with a key groove 9. Two key grooves 9 correspond to the installation position of each roller sleeve 1. The key group components 5 are installed in the key grooves 9. The core shaft 2 at both ends and between adjacent roller sleeves 1 is provided with the bearing seat assemblies 4.

[0047] Further optimization, the containing space 7 is closed at both ends of the mandrel 2 with a water plug;

[0048] Further optimization, the heat dissipation cooling groove 6 is one or a combination of spiral structure, axial collection groove structure, and interval water groove structure; in this embodiment, the spiral structure is as shown in the figure. Figure 3

[0049] The axial collection groove structure includes two collection grooves respectively arranged at both ends of the roller sleeve 13, and a plurality of connection grooves respectively connecting the two collection grooves; the first through hole 21 is connected with one of the collection grooves, and the second through hole 22 is connected with the other collection groove, and the collection groove is a groove for collecting cooling medium;

[0050] Referring to Figure 6 , in this embodiment, the interval water groove structure includes a plurality of water collection grooves 23 and a plurality of columnar water grooves 24 arranged at intervals, the water collection groove is a groove for collecting cooling medium, and the columnar water groove 24 is arranged at intervals along the roller sleeve axis direction. The recessed water channel 25, the cooling medium between adjacent water channels is connected through the recessed water channel 25, the recessed water channels 25 of adjacent columnar water grooves are not on the same axis, and the interval water groove structure in the same roller sleeve 1 starts with a collection groove and the collection groove is connected with the first through hole 21, and ends with another collection groove and the collection groove is connected with the second through hole 22.

[0051] In this embodiment, the number relationship is as follows: P=2N, M=N+1, the number of plugging 8 is Q, Q=N. The number relationship shown in this embodiment is as follows: N=4, P=8, M=5, Q=4;

[0052] In this embodiment, the key groove 9 is a semi-cylindrical shape and the centers of the semi-cylindrical shapes are on the same axis.

[0053] In this embodiment, the key groove 9 is further provided with a mounting hole 10, and the key groove 9 is further provided with a mounting hole 10, and the key groove 9 is further provided with a mounting hole 10. The key group component 5 includes a cylindrical key body 11, a bolt through hole 12, a bolt hole recess 13, two sets of sealing assemblies and a countersunk bolt 15, the bolt through hole 12 penetrates the cylindrical key body 11, and the bolt through hole 12 and the mounting hole 10 are connected. The bolt hole recess 13 is arranged on the bolt through hole 12 away from the key groove 9, the two sets of sealing assemblies are arranged on the key body 11 on both sides of the bolt hole recess 13, and the countersunk bolt 15 is installed in the bolt through hole 12 and the mounting hole 10.

[0054] ​In the embodiment, each sealing assembly includes a sealing groove and a sealing ring. The sealing groove 16 includes a first sealing groove 544 and a second sealing groove 545. The sealing ring includes a first sealing ring 546 and a second sealing ring 547. The first sealing ring 546 is installed in the first sealing groove 544. The second sealing ring 547 is installed in the second sealing groove 545.

[0055] In the embodiment, one end of the flow guide pipe 3 is provided with a double-way rotary joint 19. The water outlet of the double-way rotary joint 19 is communicated with one end of the containing space 7. The water inlet of the double-way rotary joint 19 is communicated with the inner diameter of the flow guide pipe 3. The cooling medium is selected as cooling water. The water inlet of the double-way rotary joint 19 is communicated with the inner diameter of the flow guide pipe 3 to enter the containing space 7 farthest from the double-way rotary joint 19. Then, the cooling water enters the heat dissipation cooling groove 6 through the first through hole 21 of the water inlet side first roller sleeve 1. Then, the cooling water cools the roller sleeve 1 through the heat dissipation cooling groove 6. Since the plugging 8 is in the middle of the roller sleeve and separates the containing space 7, the cold water only enters the next containing space 7 through the heat dissipation cooling groove 6 and the second through hole 22. Since there is only the plugging 8 in the middle of each roller sleeve between adjacent roller sleeves 1, the containing spaces 7 between the two roller sleeves are communicated. That is, the cooling water passing through the first roller sleeve 1 will continue to enter the heat dissipation cooling groove 6 of the second roller sleeve through the first through hole 21 of the second roller sleeve of the core shaft 2 covered by the second roller sleeve 1. The process is repeated until the cooling water flows through the last roller sleeve 1 of the containing space 7 closest to the double-way rotary joint 19. Then, the cooling water flows out through the water outlet of the double-way rotary joint 19.

[0056] In other embodiments, the flow guide pipe 3 can be provided with a double-way rotary joint 19 at one end, and a pipe water outlet hole at the other end of the flow guide pipe 3 away from the double-way rotary joint 19; the double-way rotary joint 19 water inlet communicates with the one end accommodating space 7, and the pipe water outlet hole communicates with the other end accommodating space 7, and the double-way rotary joint 19 water outlet communicates with the inner diameter of the flow guide pipe 3. The cooling medium is selected as cooling water, which enters the one end accommodating space 7 through the double-way rotary joint 19 water inlet, then enters the heat dissipation cooling groove 6 through the first through hole 21 of the first roller sleeve 1, and then cools the roller sleeve 1 through the heat dissipation cooling groove 6. Since the blocking 8 is in the middle of the roller sleeve and separates the accommodating space 7, the cold water only passes through the heat dissipation cooling groove 6 and enters the next accommodating space 7 through the second through hole 22. Since there is only the blocking 8 in the middle of each roller sleeve between adjacent roller sleeves 1, the accommodating spaces 7 between the two roller sleeves are communicated, that is, the cooling water passing through the first roller sleeve 1 will continue to enter the heat dissipation cooling groove 6 of the second roller sleeve through the first through hole 21 of the second roller sleeve covering the second roller sleeve on the mandrel 2, and so on, until the last roller sleeve 1 flows through the last roller sleeve 1. The cooling water flows into the inner diameter of the flow guide pipe 3 through the pipe water outlet hole, and then flows out through the water outlet of the double-way rotary joint 19.

[0057] Through experiments, the key group component 5 and the entire cooling system of the embodiment can withstand a force of 300 kg without leakage of cooling water. The maximum force used in the experiment is 315 kg.

[0058] The above description is a detailed description of the preferred and feasible embodiments of the present application, but the embodiments are not intended to limit the scope of the patent application of the present application. Any equivalent changes or modifications made under the technical spirit of the present application should be included in the scope of the patent.

Claims

1. A dry-type continuous casting roller for a wide-thick slab continuous casting, characterized by, It comprises N roller sleeves (1), a mandrel (2), a flow guide pipe (3), P key group components (5) and M bearing seat assemblies (4); The roller sleeve (1) is sequentially sleeved on the mandrel (2), the roller sleeve (1) is hollow, and a heat dissipation cooling groove (6) is arranged on the inner wall of the roller sleeve (1) to the outer wall direction, and the heat dissipation cooling groove (6) can pass through the cooling medium; The mandrel (2) is a hollow structure, and a flow guide pipe (3) is arranged in the mandrel (2), and there is a containing space (7) between the outer wall of the flow guide pipe (3) and the inner wall of the mandrel (2); Each mandrel (2) covered by the roller sleeve (1) is respectively provided with a first through hole (21) and a second through hole (22), the first through hole (21) and the second through hole (22) are respectively connected with the containing space (7) and the heat dissipation cooling groove (6), the containing space (7) is closed at both ends of the mandrel (2) covered by each roller sleeve, and a sealing (8) is further arranged on the flow guide pipe (3) at a corresponding position in the middle of each roller sleeve (1), and the sealing (8) can separate the containing space (7); Each mandrel (2) covered by the roller sleeve (1) is further provided with a key groove (9), and each roller sleeve (1) is installed at a position corresponding to two key grooves (9), and the key group component (5) is installed in the key groove (9); the bearing seat assembly (4) is installed between the two ends of the mandrel (2) and the adjacent roller sleeve (1).

2. A dry type casting roll for a wide-thick slab continuous casting according to claim 1, characterized in that, The heat dissipation cooling groove (6) is one or a combination of the following structures: spiral structure, axial collection groove structure, interval water groove structure; The axial collection groove structure comprises two collection grooves arranged at two ends of the roller sleeve (1) respectively, and a plurality of connection grooves connected with the two collection grooves respectively, and the first through hole (21) is connected with one of the collection grooves, and the second through hole (22) is connected with the other collection groove, and the collection groove is a groove for collecting the cooling medium; The interval water groove structure comprises a plurality of water collection grooves (23) and a plurality of columnar water grooves (24) arranged at intervals, the water collection groove is a groove for collecting the cooling medium, and the columnar water groove (24) is provided with a plurality of concave water channels (25) arranged at intervals along the roller sleeve axis direction, the cooling medium between adjacent water channels is connected through the concave water channel (25), the concave water channels (25) of adjacent columnar water grooves are not on the same axis, and the interval water groove structure in the same roller sleeve (1) starts from one collection groove and the collection groove is connected with the first through hole (21), and ends with another collection groove and the collection groove is connected with the second through hole (22).

3. A dry type casting roll for a wide-thick slab continuous casting according to claim 1, characterized in that, The number relationship is as follows: P=2N, M=N+1, the number of the sealing (8) is Q, Q=N.

4. A dry type casting roll for wide-thick slab casting according to claim 1, wherein The key groove (9) is a semicylindrical shape, and the centers of the semicylindrical shapes are on the same axis.

5. A dry type casting roll for wide-thick slab casting according to claim 1, wherein The bottom of the keyway (9) is further provided with a mounting hole (10), the key group component (5) comprises a cylindrical key body (51), a bolt through hole (52), a bolt hole recess (53), two groups of sealing components and a countersunk bolt (81), the bolt through hole (52) penetrates the cylindrical key body (51) and the bolt through hole (52) and the mounting hole (10) are communicated, the bolt hole recess (53) is arranged on the bolt through hole (52) away from the keyway (9), the two groups of sealing components are arranged on the key body (51) on the two sides of the bolt hole recess (53) respectively, and the countersunk bolt (81) is mounted in the bolt through hole (124) and the mounting hole (10).

6. A dry type casting roll for wide-thick slab casting according to claim 5, wherein Each group of sealing components comprises a sealing groove and a sealing ring, the sealing groove comprises a first sealing groove (544) and a second sealing groove (545), the sealing ring (542) comprises a first sealing ring (546) and a second sealing ring (547), the first sealing ring (546) is mounted in the first sealing groove (544), and the second sealing ring (547) is mounted in the second sealing groove (545).

7. A dry type casting roll for wide-thick slab casting according to claim 1, wherein One end of the flow guide pipe (3) is provided with a double-way rotary joint (19), the water outlet of the double-way rotary joint (19) communicates with the one-end containing space (7), and the water inlet of the double-way rotary joint (19) communicates with the inner diameter of the flow guide pipe (3).

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