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

Abstract

The invention relates to the technical field of steel plate production and casting, in particular to a dry continuous casting roller for continuous casting of wide and thick slabs and an assembly method. 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. In addition, the invention further provides an assembling method which comprises the steps of heating of the roller sleeve, installation of the key set component, installation of the flow guide pipe fitting and the like, and accurate assembling and efficient use of the dry continuous casting roller are guaranteed. The 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 invention relates to the technical field of steel plate production and casting, and in particular to a dry continuous casting roller for continuous casting of wide and thick slabs and an assembly method thereof. [Background technology]

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

[0003] However, as the thickness of the slab increases, the technical challenges faced in the continuous casting process of wide and thick slabs are also intensifying. Traditional continuous casting technology cannot simply increase the width of the continuous casting roller to solve the problem. Slab thickening brings many technical difficulties:

[0004] 1. Straightening becomes more difficult: As the thickness of the slab increases, its deformation, strength and hardness increase accordingly, and the difficulty of the straightening process increases significantly. Especially in the later cooling stage, thicker slabs may cause higher stress and hardness, increasing the mechanical burden during the straightening process.

[0005] 2. Increased difficulty in controlling cooling speed: The cooling speed of thick slabs directly affects the microstructure and final performance of the steel plate. Too fast a cooling speed may cause excessive stress inside the slab, thus causing cracks or affecting its strength and toughness. Therefore, how to effectively control the cooling speed and ensure product quality becomes a major challenge.

[0006] 3. Increased roller wear: Thick slabs cause more severe wear on the continuous casting rollers, especially in the area where the roller surface contacts the billet. Roller surface wear not only directly affects the service life of the roller, but may also lead to a decrease in the surface quality of the billet, increasing the maintenance frequency and cost during the production process.

[0007] Based on these technical challenges, the use of spray water in the straightening and leveling stages of wide and thick slab production needs to be reduced or eliminated to improve slab quality and heat transfer rolling efficiency. Using dry continuous casting rolls as one of the solutions can effectively reduce stress problems caused by excessive cooling speed, avoid cracks that may be caused by traditional water cooling methods, and reduce environmental pollution during the production process.

[0008] The dry continuous casting rollers do not rely on external water sources for cooling, but achieve roller surface cooling through the internal cooling structure design. This technological innovation can effectively reduce the adverse effects of excessive cooling on the ingot. Furthermore, the dry continuous casting rollers can apply a large amount of pressure reduction to the high-temperature ingot in the secondary cooling zone, which is crucial for solving the internal defects of the ingot and improving the mechanical properties of the steel plate. In addition, through simulation research, the cooling method of the dry continuous casting rollers can keep the rollers working at a lower temperature, thereby increasing the service life of the rollers and reducing the occurrence of cracks on the surface of the ingot.

[0009] Although dry continuous casting rollers are generally considered to have significant advantages in the production of wide and thick slabs, their practical application still faces some technical difficulties:

[0010] 1. Poor cooling effect of the internal cooling water system: At present, many dry continuous casting rollers still rely on complex internal cooling water systems, but the cooling effect is often not ideal, and the production process is relatively complex and the cost is high. The traditional internal cooling water system usually uses a spiral groove machined on the mandrel to form an internal cooling system with the roller sleeve. However, this design has a small heat exchange area and is far away from the roller surface, resulting in low heat exchange efficiency, making it difficult to effectively meet the production needs of large-size, high-performance steel.

[0011] 2. Inadequate design of the sealing system: The sealing system of the dry 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, causing 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. Problems with the fit between the mandrel and the roller sleeve: The fit between the mandrel and the roller sleeve requires high precision. The traditional interference fit (0.694-0.786mm) is difficult to assemble and cannot be disassembled after assembly. During the use of the roller, once it is damaged or needs repair, it is extremely difficult to repair. The mandrel often needs to be sawed off and disassembled using special equipment, resulting in high repair costs, and the mandrel is often not reusable.

[0013] 4. The "dry" effect is not fully realized: Although the dry continuous casting roller is designed without external cooling water, in the actual production process, due to insufficient heat dissipation, it is still necessary to spray water on the roller surface for cooling. This not only increases energy consumption, but also fails to give full play to the advantages of dry continuous casting rollers in energy saving and improving production efficiency.

[0014] For example, the patent with the patent publication number CN113560512B adopts the design of internal cooling water circuit. Although this design attempts to solve the above problems, it still has the following shortcomings: the heat exchange area of ​​the cooling system design of the spiral groove and the roller sleeve is small and far away from the roller surface, resulting in poor heat exchange efficiency and unable to meet the efficient cooling requirements of thick slabs. The assembly structure of this patent is complex, and the interference fit between the roller sleeve and the mandrel is difficult. Once the assembly is completed, it is difficult to disassemble, which affects the subsequent maintenance and repair. Due to the imperfect design of the water cooling system, the selection of the interference fit amount is very critical. If the interference fit amount is too large, it will be impossible to disassemble and scale will accumulate; if the interference fit amount is too small, it may cause water leakage in the water cooling system.

[0015] Therefore, how to improve cooling efficiency, reduce maintenance costs and improve product quality while ensuring the efficient operation of dry continuous casting rollers has become a technical problem that needs to be urgently solved in the current wide and thick slab production field. [Summary of the invention]

[0016] The purpose of the present invention is to provide a dry continuous casting roller and assembly method for continuous casting of wide and thick slabs, aiming at improving the cooling effect, preventing leakage during use, reducing maintenance costs, and improving the production efficiency and product quality of wide and thick slabs, in view of the problems existing in the existing wide and thick slab continuous casting technology, such as low cooling efficiency, poor cooling liquid sealing and serious leakage, and difficult assembly and maintenance.

[0017] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0018] A dry continuous casting roller for continuous casting of wide and thick slabs, comprising N roller sleeves, a core shaft, a guide pipe, P key group components and M bearing seat assemblies; the roller sleeves are sequentially sleeved on the core shaft, the roller sleeve is hollow, and a heat dissipation cooling groove is arranged on the inner wall of the roller sleeve toward the outer wall, and the heat dissipation cooling groove can allow cooling medium to pass through; the core shaft is a hollow structure, and a guide pipe is arranged inside, and there is a accommodating space between the outer wall of the guide pipe and the inner wall of the core shaft; each core shaft covered by the roller sleeve is respectively provided with a first through hole and a second through hole, and the first through hole and the second through hole are respectively connected with the accommodating space and the heat dissipation cooling groove, and the accommodating space is closed at both ends of the core shaft, and a circle of plugging is also provided on the guide pipe at the corresponding position in the middle of each roller sleeve, and the plugging can separate the accommodating space; each core shaft covered by the roller sleeve is also provided with a keyway, and the key group component is installed in the keyway; bearing seat assemblies are installed at both ends of the core shaft and between adjacent roller sleeves.

[0019] Further optimized spiral structure, axial collecting tank structure, and interval water tank structure;

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

[0021] The spaced water trough structure includes: a plurality of water collecting troughs and a plurality of columnar water troughs arranged at intervals, the water collecting trough is a circle of grooves used to collect cooling medium, the columnar water trough is spaced along the axis direction of the roller sleeve and a plurality of concave water channels are arranged at intervals, the cooling medium between adjacent water channels is connected through the concave water channels, the concave water channels of adjacent columnar water troughs are not on the same axis, the spaced water trough structure in the same roller sleeve starts with a collecting trough and the collecting trough is connected to the first through hole, and ends with another collecting trough and the collecting trough is connected to the second through hole.

[0022] For further optimization, the heat dissipation cooling groove can also be the following structure: two collecting grooves are respectively arranged at the two ends of the roller sleeve, and a plurality of connecting grooves are respectively connected to the two collecting grooves; and the first through hole is connected to one of the collecting grooves, and the second through hole is connected to the other collecting groove.

[0023] For further optimization, the quantitative relationship is as follows: P=2N, M=N+1, the number of blockages is Q, Q=N.

[0024] For further optimization, the keyway is semi-cylindrical and the centers of the semi-cylindrical shapes are on the same axis.

[0025] Further optimized, a mounting hole is also provided at the bottom of the keyway, and the key group components include: a cylindrical key body, a bolt through hole, a bolt hole recess, two groups of sealing components and a countersunk bolt, the bolt through hole passes through the cylindrical key body and the bolt through hole and the mounting hole are connected, the bolt hole recess is provided on the bolt through hole away from one end of the keyway, the two groups of sealing components are respectively provided on the key body on both sides of the bolt hole recess, and the countersunk bolt is installed in the bolt through and mounting holes.

[0026] Further optimized, each group of sealing components includes a sealing groove and a sealing ring, the sealing groove includes a first sealing groove and a second sealing groove, the sealing ring includes 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] For further optimization, a two-way rotary joint is installed at one end of the guide pipe; the water outlet of the two-way rotary joint is communicated with the accommodating space at one end, and the water inlet of the two-way rotary joint is communicated with the inner diameter of the guide pipe.

[0028] Further optimized, a two-way rotary joint is installed at one end of the diversion pipe, and a pipe water outlet hole is also provided on the diversion pipe at the end away from the two-way rotary joint; the water inlet of the two-way rotary joint is communicated with the accommodating space at one end, the water outlet of the pipe is communicated with the accommodating space at the other end, and the water outlet of the two-way rotary joint is communicated with the inner diameter of the diversion pipe.

[0029] A method for assembling a dry continuous casting roller for continuous casting of wide and thick slabs, wherein the dry continuous casting roller is used in continuous casting of steel slabs with a width of not less than 2500 mm and a thickness of 350-450 mm. The assembly process comprises the following steps:

[0030] S1. Heat the roller sleeve to 190-220℃ first, and the installation temperature of the roller sleeve should be maintained at 150-170℃;

[0031] S2. Take out the mandrel. Before installing the corresponding roller sleeve, the key assembly components on the mandrel corresponding to each roller sleeve installation position must be installed in the keyway first. If the number of roller sleeves N is an odd number, follow the steps a to install; if N is an even number, follow the steps b to install:

[0032] a. Install the middle roller sleeve first, install the bearing seat assemblies on both sides of the middle roller sleeve, and then install the roller sleeves and bearing seat assemblies on both sides until all roller sleeves and bearing seat assemblies are installed;

[0033] b. Install the middle bearing seat assembly first, then install the roller sleeve and bearing seat assemblies on both sides respectively, until all roller sleeves and bearing seat assemblies are installed;

[0034] S3, take out the guide pipe again, install the plug at the predetermined installation position of the plug; and seal the accommodation space at both ends of the core shaft;

[0035] S4. Ensure that the first through hole and the second through hole are connected to the accommodating space and the heat dissipation cooling groove respectively.

[0036] Further optimized, a small interference fit is performed between the roller sleeve and the core shaft, and the small interference fit is 0.05-0.08mm.

[0037] Further optimized, the dry continuous casting roller is used for continuous casting of steel slabs with a width of 2500mm-2800mm and a thickness of 400-450mm.

[0038] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0039] 1. The present invention improves the design of the cooling system. The present invention arranges heat dissipation cooling grooves on the roller sleeve so that the coolant can be more evenly distributed on the roller surface, significantly improving the cooling effect and effectively meeting the production needs of wide and thick slab steel. The dry continuous casting roller of the present invention has significantly enhanced high temperature resistance, which slows down the wear rate of the roller during high-temperature continuous casting, thereby extending the service life of the continuous casting roller, reducing the frequency of maintenance and replacement, and significantly reducing the maintenance cost in production; there is no need to spray water on the surface for cooling, which reduces the generation of surface cracks on the casting billet and makes production more environmentally friendly.

[0040] 2. The present invention adopts innovative key assembly components and keyway designs. The key assembly components proposed in the present invention have 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 levels (low pressure, high pressure, ultra-high pressure), it can be flexibly adjusted according to actual needs, 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.

[0041] The present invention optimizes the matching mode between the mandrel and the roller sleeve, adopts a unique semicircular keyway and a small interference fit, avoids the complexity and precision problems of the mandrel segment assembly in the prior art, and reduces the difficulty of the mandrel in the processing process. Compared with the traditional segmented assembly mandrel, the mandrel structure of the present invention is more stable, can withstand high loads under harsh working conditions, and avoids the risk of deformation and breakage caused by multi-segment assembly.

[0042] 3. In the matching of the roller sleeve and the core shaft, the present invention combines a small interference fit with an innovative key assembly component design to ensure efficient and stable power transmission between the roller core and the roller sleeve, and effectively prevent leakage of cooling liquid. In addition, this optimized design also makes the power transmission of the roller more stable and reliable, reduces mechanical wear, and increases the service life of the equipment. A semicircular keyway is set at the matching position of the roller sleeve and the core shaft, and each roller sleeve is equipped with a concentric keyway design. Such a design not only ensures a tight fit between the roller core and the roller sleeve, but also makes the disassembly process easier. Especially in the repair process after the continuous casting roller is retired, the small interference fit achieves easier disassembly and reinstallation than the large interference fit of the prior art. The present invention sets the heat dissipation cooling groove on the roller sleeve, which is very easy to clean scale after disassembly, and the maintenance is simple and efficient.

[0043] 4. The assembly and disassembly process of the dry continuous casting rollers is simplified, avoiding the high maintenance costs and long downtime caused by the difficulty of assembly in traditional technologies. The maintenance and replacement of the rollers become more convenient through the detachable structural design, further improving the operating efficiency of the production equipment and the overall efficiency of the production line.

Brief Description of the Drawings

[0044] Figure 1 , a schematic structural diagram of a preferred embodiment of the present invention;

[0045] Figure 2 , a schematic structural diagram of another preferred embodiment of the present invention;

[0046] Figure 3 , a cross-sectional view of one of the roller sleeves in the axial direction after installation of the present invention;

[0047] Figure 4 , a schematic diagram of the key assembly structure of the present invention;

[0048] Figure 5 , a schematic diagram of a preferred embodiment of the present invention after installation is completed;

[0049] Figure 6 , a schematic structural diagram of a preferred embodiment of the heat dissipation cooling tank of the present invention;

[0050] In the accompanying drawings, 1-roller sleeve, 2-core shaft, 3-guiding pipe, 4-bearing seat assembly, 5-key group component, 6-heat dissipation cooling groove, 7-accommodating space, 8-blocking, 21-first through hole, 22-second through hole, 23-water collecting groove, 24-cylindrical water groove, 25-concave water channel, 9-key groove, 10-mounting hole, 51-cylindrical key body, 52-bolt through hole, 53-bolt hole recess, 8-countersunk bolt, 544-first sealing groove, 545-second sealing groove, 546-first sealing ring, 547-second sealing ring, 19-two-way rotary joint. [Specific implementation method]

[0051] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0054] Please refer to the accompanying drawings of the embodiments of the present invention.

[0055] Example 1

[0056] A dry continuous casting roller for continuous casting of wide and thick slabs, comprising N roller sleeves 1, a mandrel 2, a guide pipe 3, P key assembly 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 toward the outer wall, and the heat dissipation cooling groove 6 can be used for cooling medium to pass through; the mandrel 2 is a hollow structure, and a guide pipe 3 is arranged inside, and there is a receiving space 7 between the outer wall of the guide pipe 3 and the inner wall of the mandrel 2; each roller sleeve 1 covers The core shaft 2 is provided with a first through hole 21 and a second through hole 22, respectively. The first through hole 21 and the second through hole 22 are connected to the accommodating space 7 and the heat dissipation cooling groove 6, respectively. The accommodating space 7 is closed at both ends of the core shaft 2. The guide pipe 3 at the corresponding position in the middle of each roller sleeve 1 is also provided with a circle of plugging 8, and the plugging 8 can separate the accommodating space 7; a keyway 9 is also provided on each core shaft 2 covered by the roller sleeve 1, and the key group component 5 is installed in the keyway 9; bearing seat assemblies 4 are installed at both ends of the core shaft 2 and between adjacent roller sleeves 1.

[0057] Further optimized, the accommodating space 7 is sealed at both ends of the core shaft 2 with water plugs;

[0058] Further optimized, the heat dissipation cooling groove 6 is a combination of one or more of a spiral structure, an axial collecting groove structure, and a spaced water groove structure; in this embodiment, the spiral structure is as follows Figure 3 shown.

[0059] The axial collecting groove structure includes: two collecting grooves, respectively arranged at the two ends of the roller sleeve 13, and a plurality of connecting grooves, respectively connecting the two collecting grooves; and the first through hole 21 is connected to one of the collecting grooves, and the second through hole 22 is connected to the other collecting groove, and the collecting groove is a groove for collecting cooling medium;

[0060] Reference Figure 6In this embodiment, the spaced water trough structure includes: a plurality of water collecting troughs 23 and a plurality of columnar water troughs 24 are arranged at intervals, the water collecting trough is a circle of grooves for collecting cooling medium, the columnar water trough 24 is arranged with a plurality of concave water channels 25 along the axis direction of the roller sleeve, the cooling medium between adjacent water channels is connected through the concave water channels 25, the concave water channels 25 of adjacent columnar water troughs are not on the same axis, the spaced water trough structure in the same roller sleeve 1 starts with a collecting trough and the collecting trough is connected to the first through hole 21, and ends with another collecting trough and the collecting trough is connected to the second through hole 22.

[0061] In this embodiment, the quantitative relationship is as follows: P = 2N, M = N + 1, the number of plugs 8 is Q, Q = N. The quantitative relationship shown in this embodiment is as follows N = 4, P = 8, M = 5, Q = 4;

[0062] In this embodiment, the keyway 9 is semi-cylindrical and the centers of the semi-cylindrical shapes are on the same axis.

[0063] In this embodiment, a mounting hole 10 is also provided at the bottom of the keyway 9, and the key group component 5 includes: a cylindrical key body 11, a bolt through hole 12, a bolt hole recess 13, two groups of sealing components and a countersunk bolt 15, the bolt through hole 12 passes through the cylindrical key body 11 and the bolt through hole 12 and the mounting hole 10 are connected, the bolt hole recess 13 is provided on the bolt through hole 12 away from one end of the keyway 9, the two groups of sealing components are respectively provided 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.

[0064] In this embodiment, each group of sealing components 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, and the second sealing ring 547 is installed in the second sealing groove 545.

[0065] In this embodiment, a two-way rotary joint 19 is installed at one end of the guide pipe 3; the water outlet of the two-way rotary joint 19 is communicated with the accommodation space 7 at one end, and the water inlet of the two-way rotary joint 19 is communicated with the inner diameter of the guide pipe 3. The cooling medium is selected as cooling water, and the water inlet of the two-way rotary joint 19 is communicated with the inner diameter of the guide pipe 3 and enters the accommodation space 7 farthest from the end of the two-way rotary joint 19, and then enters the heat dissipation cooling groove 6 through the first through hole 21 of the first roller sleeve 1 on the water inlet side, and then cools the roller sleeve 1 through the heat dissipation cooling groove 6. Since the plug 8 is located in the middle of the roller sleeve and divides the accommodation space 7, the cold water can only enter the next accommodation space 7 through the heat dissipation cooling groove 6 and the second through hole 22. Since there is only a seal 8 in the middle of each adjacent roller sleeve 1, the accommodating space 7 between the two roller sleeves is interconnected, 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 on the core shaft 2 covered by the second roller sleeve 1... and so on, until it flows through the accommodating space 7 of the last roller sleeve 1 closest to the two-way rotary joint 19, and then flows out through the water outlet of the two-way rotary joint 19.

[0066] In other embodiments, the guide pipe 3 may be provided with a two-way rotary joint 19 at one end, and a pipe outlet hole may be provided on the guide pipe 3 at the end away from the two-way rotary joint 19; the water inlet of the two-way rotary joint 19 is communicated with the accommodation space 7 at one end, the pipe outlet hole is communicated with the accommodation space 7 at the other end, and the water outlet of the two-way rotary joint 19 is communicated with the inner diameter of the guide pipe 3. The cooling medium is selected as cooling water, which enters the accommodation space 7 at one end through the water inlet of the two-way rotary joint 19, and then enters the heat dissipation cooling groove 6 through the first through hole 21 of the first roller sleeve 1 on this side, and then cools the roller sleeve 1 through the heat dissipation cooling groove 6. Since the plug 8 is located in the middle of the roller sleeve and divides the accommodation space 7, the cold water can only enter the next accommodation space 7 through the heat dissipation cooling groove 6 and the second through hole 22. Since there is a seal 8 only in the middle of each roller sleeve between adjacent roller sleeves 1, the accommodating spaces 7 between the two roller sleeves are interconnected, 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 on the core shaft 2 covered by the second roller sleeve 1... and so on, until it flows through the accommodating space 7 closest to the edge of the last roller sleeve 1. At this time, since a pipe outlet hole is provided on the guide pipe 3, the final cold water flows into the inner pipe diameter of the guide pipe 3 through the pipe outlet hole, and then flows out through the outlet of the two-way rotary joint 19.

[0067] Through tests, it was found that the key assembly component 5 and the entire cooling system of this embodiment can withstand a force of 300 kg without cooling water leaking, and the maximum force used in the test was 315 kg.

[0068] Example 2

[0069] An assembly method of a dry continuous casting roller for continuous casting of wide and thick slabs according to claim 1, characterized in that the dry continuous casting roller is used in the continuous casting of steel slabs with a width of not less than 2500 mm and a thickness of 350-450 mm, and the assembly process comprises the following steps:

[0070] S1. Heat the roller sleeve 1 to 190-220℃ first, and the installation temperature of the roller sleeve 1 should be maintained at 150-170℃;

[0071] S2. Take out the mandrel 2. Before installing the corresponding roller sleeve 1, the key assembly component 5 on the mandrel 2 corresponding to each roller sleeve 1 installation position should be installed in the key groove 9. If the number N of roller sleeves 1 is an odd number, follow the following steps a to install; if N is an even number, follow the following steps b to install:

[0072] a. Install the middle roller sleeve 1 first, install the bearing seat assemblies 4 on both sides of the middle roller sleeve 1, and then install the roller sleeves 1 and bearing seat assemblies 4 on both sides respectively, until all roller sleeves 1 and bearing seat assemblies 4 are installed;

[0073] b. Install the middle bearing seat assembly 4 first, then install the roller sleeve 1 and the bearing seat assembly 4 on both sides respectively, until all roller sleeves 1 and bearing seat assemblies 4 are installed;

[0074] S3, take out the guide pipe 3, install the plug 8 at the predetermined installation position of the plug 8; and seal the accommodating space 7 at both ends of the core shaft 2;

[0075] S4. Ensure that the first through hole 21 and the second through hole 22 are connected to the accommodating space 7 and the heat dissipation cooling groove 6 respectively.

[0076] In this embodiment, a small interference fit is performed between the roller sleeve 1 and the core shaft 2, and the small interference fit is 0.05-0.08 mm.

[0077] In this embodiment, the dry continuous casting roller is used for continuous casting of steel slabs with a width of 2500mm-2800mm and a thickness of 400-450mm.

[0078] Example 3

[0079] A dry continuous casting roller for continuous casting of wide and thick slabs comprises N roller sleeves 1, a core shaft 2, a guide pipe 3, P key assembly components 5 and M bearing seat assemblies 4; in this embodiment, N=2, P=4, M=3, Q=2.

[0080] An assembly method of a dry continuous casting roller for continuous casting of wide and thick slabs as claimed in claim 1, wherein the dry continuous casting roller is used in continuous casting of steel slabs with a width of not less than 2500 mm and a thickness of 350-450 mm, and the assembly process comprises the following steps:

[0081] S1. Heat the roller sleeve 1 to 190-220℃ first, and the installation temperature of the roller sleeve 1 should be maintained at 150-170℃;

[0082] S2. Take out the mandrel 2. Before installing the corresponding roller sleeve 1, the key assembly component 5 on the mandrel 2 corresponding to each roller sleeve 1 installation position must be installed in the keyway 9 first. First install the middle bearing seat assembly 4, and then install the roller sleeve 1 and the bearing seat assembly 4 in the same direction to the left, and then install another roller sleeve 1 and the bearing seat assembly 4 in the same direction to the right; in this embodiment, the installation is completed because the number is 2; if it is a multiple of 2, install it in sequence according to this method, and after installing the roller sleeve 1 and the bearing seat assembly 4 on one side; the next step is to install the roller sleeve 1 and the bearing seat assembly 4 on the other side; and so on, until all roller sleeves 1 and bearing seat assemblies 4 are installed.

[0083] In this embodiment, there can also be another installation method, that is, take out the core shaft 2, and before installing the corresponding roller sleeve 1, the key group component 5 on the core shaft 2 corresponding to each roller sleeve 1 installation position must first be installed in the key groove 9, first install the roller sleeve 1 and the bearing seat assembly 4 on the left side, then install the middle bearing seat assembly 4 and the roller sleeve 1 on the other side, and then install the bearing seat assembly 4 in the same direction. In this embodiment, the number is 2, and the installation is completed here.

[0084] S3, take out the guide pipe 3, install the plug 8 at the predetermined installation position of the plug 8; and seal the accommodating space 7 at both ends of the core shaft 2;

[0085] S4. Ensure that the first through hole 21 and the second through hole 22 are connected to the accommodating space 7 and the heat dissipation cooling groove 6 respectively.

[0086] In this embodiment, a small interference fit is performed between the roller sleeve 1 and the core shaft 2, and the small interference fit is 0.05-0.08 mm.

[0087] In this embodiment, the dry continuous casting roller is used for continuous casting of steel slabs with a width of 2500mm-2800mm and a thickness of 350-400mm.

[0088] Example 4

[0089] A dry continuous casting roller for continuous casting of wide and thick slabs comprises N roller sleeves 1, a core shaft 2, a guide pipe 3, P key assembly components 5 and M bearing seat assemblies 4; in this embodiment, N=3, P=6, M=4, Q=3.

[0090] An assembly method of a dry continuous casting roller for continuous casting of wide and thick slabs as claimed in claim 1, wherein the dry continuous casting roller is used in continuous casting of steel slabs with a width of not less than 2500 mm and a thickness of 350-450 mm, and the assembly process comprises the following steps:

[0091] S1. Heat the roller sleeve 1 to 190-220℃ first, and the installation temperature of the roller sleeve 1 should be maintained at 150-170℃;

[0092] S2, take out the mandrel 2, before installing the corresponding roller sleeve 1, the key assembly component 5 on the mandrel 2 corresponding to each roller sleeve 1 installation position should be installed in the keyway 9 first, first install the middle roller sleeve 1, install the bearing seat assembly 4 on both sides of the middle roller sleeve 1, and then install the roller sleeves 1 and bearing seat assemblies 4 on both sides respectively, until all roller sleeves 1 and bearing seat assemblies 4 are installed;

[0093] b. Install the middle bearing seat assembly 4 first, then install the roller sleeve 1 and the bearing seat assembly 4 on both sides respectively, until all roller sleeves 1 and bearing seat assemblies 4 are installed;

[0094] S3, take out the guide pipe 3, install the plug 8 at the predetermined installation position of the plug 8; and seal the accommodating space 7 at both ends of the core shaft 2;

[0095] S4. Ensure that the first through hole 21 and the second through hole 22 are connected to the accommodating space 7 and the heat dissipation cooling groove 6 respectively.

[0096] In this embodiment, a small interference fit is performed between the roller sleeve 1 and the core shaft 2, and the small interference fit is 0.05-0.08 mm.

[0097] In this embodiment, the dry continuous casting roller is used for continuous casting of steel slabs with a width of 2500mm-2800mm and a thickness of 400-450mm.

[0098] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A dry continuous casting roller for continuous casting of wide and thick slabs, characterized in that: It comprises N roller sleeves (1), a core shaft (2), a flow guide pipe (3), P key assembly components (5) and M bearing seat assemblies (4); The roller sleeve (1) is sequentially sleeved on the core shaft (2); the roller sleeve (1) is hollow; a heat dissipation cooling groove (6) is arranged on the inner wall of the roller sleeve (1) in the direction of the outer wall; a cooling medium can pass through the heat dissipation cooling groove (6); the core shaft (2) is a hollow structure, a guide pipe (3) is arranged inside, and a receiving space (7) is provided between the outer wall of the guide pipe (3) and the inner wall of the core shaft (2); A first through hole (21) and a second through hole (22) are respectively provided on the core shaft (2) covered by each roller sleeve (1), and 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), and the accommodating space (7) is closed at both ends of the core shaft (2) covered by each roller sleeve, and a circle of sealing (8) is also provided on the guide pipe (3) at a corresponding position in the middle of each roller sleeve (1), and the sealing (8) can separate the accommodating space (7); A keyway (9) is also provided on the core shaft (2) covered by each roller sleeve (1), and the key assembly component (5) is installed in the keyway (9); bearing seat assemblies (4) are installed at both ends of the core shaft (2) and between adjacent roller sleeves (1).

2. A dry continuous casting roller for continuous casting of wide and thick slabs according to claim 1, characterized in that: The heat dissipation cooling groove (6) is a combination of one or more of the following structures: a spiral structure, an axial collecting groove structure, and a spaced water groove structure; The axial collecting groove structure includes: two collecting grooves, respectively arranged at the two ends of the roller sleeve 13, and a plurality of connecting grooves, respectively connecting the two collecting grooves; and the first through hole 21 is connected to one of the collecting grooves, and the second through hole 22 is connected to the other collecting groove, and the collecting groove is a groove for collecting cooling medium; The spaced water trough structure comprises: a plurality of water collecting troughs (23) and a plurality of columnar water troughs (24) arranged at intervals, the water collecting trough being a circle of grooves used to collect cooling medium, the columnar water trough (24) being arranged at intervals along the axis direction of the roller sleeve with a plurality of concave water channels (25), the cooling medium between adjacent water channels being communicated through the concave water channels (25), the concave water channels (25) of adjacent columnar water troughs being not on the same axis, the spaced water trough structure in the same roller sleeve (1) starting with a collecting trough connected to the first through hole (21), and ending with another collecting trough connected to the second through hole (22).

3. The dry continuous casting roller for continuous casting of wide and thick slabs according to claim 1, characterized in that: The quantitative relationship is as follows: P=2N, M=N+1, the number of plugging (8) is Q, Q=N.

4. The dry continuous casting roller for continuous casting of wide and thick slabs according to claim 1, characterized in that: The keyway (9) is semi-cylindrical and the centers of the semi-cylindrical shapes are located on the same axis.

5. The dry continuous casting roller for continuous casting of wide and thick slabs according to claim 1, characterized in that: A mounting hole (10) is also provided at the bottom of the keyway (9), and the key assembly component (5) comprises: a cylindrical key body (51), a bolt through hole (52), a bolt hole recess (53), two sets of sealing components and a countersunk bolt (8), wherein the bolt through hole (52) passes through the cylindrical key body (51) and the bolt through hole (52) and the mounting hole (10) are connected, and the bolt hole recess (53) is provided on the bolt through hole (52) at one end away from the keyway (9), and the two sets of sealing components are respectively provided on the key body (51) at both sides of the bolt hole recess (53), and the countersunk bolt (8) is installed in the bolt through hole (124) and the mounting hole (10).

6. A dry continuous casting roller for continuous casting of wide and thick slabs according to claim 5, characterized in that: Each sealing assembly includes a sealing groove and a sealing ring, wherein the sealing groove includes a first sealing groove (544) and a second sealing groove (545), and the sealing ring (542) includes a first sealing ring (546) and a second sealing ring (547), wherein the first sealing ring (546) is installed in the first sealing groove (544), and the second sealing ring (547) is installed in the second sealing groove (545).

7. The dry continuous casting roller for continuous casting of wide and thick slabs according to claim 1, characterized in that: A two-way rotary joint (19) is installed at one end of the flow guiding pipe (3); the water outlet of the two-way rotary joint (19) is in communication with the accommodation space (7) at one end, and the water inlet of the two-way rotary joint (19) is in communication with the inner diameter of the flow guiding pipe (3).

8. An assembly method of dry continuous casting rollers for wide and thick slab continuous casting according to claim 1, characterized in that: The dry continuous casting roller is used for continuous casting of steel slabs with a width of not less than 2500 mm and a thickness of 350-450 mm. The assembly process includes the following steps: S1. Heat the roller sleeve (1) to 190-220°C. The installation temperature of the roller sleeve (1) should be maintained at 150-170°C. S2. Take out the mandrel (2). Before installing the corresponding roller sleeve (1), the key assembly component (5) on the mandrel (2) corresponding to each roller sleeve (1) installation position must first be installed in the keyway (9). If the number N of roller sleeves (1) is an odd number, install them according to the following step a; if N is an even number, install them according to the following step b: a. Install the middle roller sleeve (1) first, install the bearing seat assemblies (14) on both sides of the middle roller sleeve (1), and then install the roller sleeves (1) and bearing seat assemblies (14) on both sides, until all roller sleeves (1) and bearing seat assemblies (14) are installed; b. Install the middle bearing seat assembly (14) first, then install the roller sleeve (1) and the bearing seat assembly (14) on both sides respectively, until all roller sleeves (1) and bearing seat assemblies (14) are installed; S3, taking out the guide pipe (3), installing the plug (8) at the predetermined installation position of the plug (8); sealing the accommodation space (7) at both ends of the core shaft (2); S4. Ensure that the first through hole (21) and the second through hole (22) are connected to the accommodating space (7) and the heat dissipation cooling groove (6) respectively.

9. An assembly method of dry continuous casting rollers for wide and thick slab continuous casting according to claim 8, characterized in that: A small interference fit is performed between the roller sleeve (1) and the core shaft (2), wherein the small interference fit is 0.05-0.08 mm.

10. An assembly method of dry continuous casting rollers for wide and thick slab continuous casting according to claim 8, characterized in that: The dry continuous casting roller is used for continuous casting of steel slabs with a width of 2500mm-2800mm and a thickness of 400-450mm.

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