Dry continuous casting roller sleeve with multi-stage cooling turbulent flow water path

Abstract

The utility model relates to the technical field of steel continuous casting, in particular to a multi-stage cooling turbulent flow water path dry type continuous casting roller sleeve. Comprising a roller sleeve body, multiple stages of cooling grooves, a water inlet end flow guide groove, a water outlet end flow guide groove and inner roller width flow guide holes, the multiple stages of cooling grooves are distributed in the axial direction of the roller sleeve, every two adjacent cooling grooves are separated through a supporting piece, the inner roller width flow guide holes are formed in the supporting pieces, and a specific included angle is formed between every two adjacent flow guide holes to guide cooling water to flow between the cooling grooves and generate turbulent flow. According to the design, through the multi-stage turbulent flow cooling water channel, multi-stage deflection and flow velocity change of cooling water are achieved, the cooling effect uniformity and efficiency are improved, the cooling effect of the roller sleeve is improved, the service life of the roller sleeve is prolonged, the maintenance cost is reduced, and the roller sleeve is particularly suitable for continuous casting production of wide and thick steel slabs.

Description

[Technical Field]

[0001] This utility model relates to the field of steel continuous casting technology, specifically to a multi-stage cooling turbulence water channel dry continuous casting roll sleeve. [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] As a key piece of equipment, the cooling effect of dry continuous casting rolls directly affects the quality of the cast billet and production efficiency. Traditional continuous casting roll cooling technology is ineffective and suffers from the following problems:

[0005] The internal cooling water system has poor cooling effect: Traditional internal cooling water systems typically use spiral grooves machined on the mandrel to form an internal cooling system in conjunction with the roller sleeve. However, this design has a small heat exchange area and is far from the roller 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] These problems limit the application effect of dry continuous casting rolls in actual production. Therefore, developing a water-cooled heat exchange dry continuous casting roll with good cooling effect and convenient maintenance is of great practical significance. [Utility Model Content]

[0007] The purpose of this invention is to address the problem of poor cooling effect of dry continuous casting rolls by providing a multi-stage cooling turbulence water channel dry continuous casting roll sleeve. By innovatively designing multi-stage cooling water channels on the roll sleeve, the cooling effect is improved, the roll sleeve life is increased, and maintenance costs are reduced.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A multi-stage cooling turbulence water channel dry continuous casting roll sleeve includes a roll sleeve body, wherein the roll sleeve body is provided with a cooling water channel system, the cooling water channel system including:

[0010] Multi-stage cooling tanks: N through-type cooling tanks distributed sequentially along the axial direction of the roller sleeve form the first to Nth stages of cooling tanks, where N≥2, and adjacent cooling tanks are separated by support panels;

[0011] Water inlet guide groove: It is set at the water inlet end of the roller sleeve body and is connected to the first-stage cooling groove;

[0012] Water outlet guide groove: set at the water outlet end of the roller sleeve body, and connected to the Nth stage cooling tank;

[0013] Inner roll width guide holes: These are set on the support webs to allow cooling water to flow in or out; an included angle β is formed between the inner roll width guide holes on adjacent support webs, and the two sides of the included angle β are: the line connecting the center points of the two guide holes, and the reference line starting from the center point of any guide hole and parallel to the central axis of the roll sleeve, and the included angle β is 0°-65°.

[0014] This utility model relates to a continuous casting roller sleeve that is fitted onto a mandrel.

[0015] Further optimized, the included angle β is 15°-45°.

[0016] In a further optimized configuration, N=6. The cooling water sequentially enters the first-stage cooling tank through the inlet guide channel, then deflects at an angle β1 through the inner roller guide holes to reach the second-stage cooling tank; after deflecting at an angle β2 through the inner roller guide holes to reach the third-stage cooling tank; after deflecting at an angle β3 through the inner roller guide holes to reach the fourth-stage cooling tank; after deflecting at an angle β4 through the inner roller guide holes to reach the fifth-stage cooling tank; after deflecting at an angle β5 through the inner roller guide holes to reach the sixth-stage cooling tank; and finally flows out of the cooling water system of the roller sleeve through the outlet guide channel.

[0017] Further optimized, the included angle of the inner roll width guide hole β1 = 15° or 45°, the included angle of the inner roll width guide hole β2 = 30°, the included angle of the inner roll width guide hole β4 = 30°, and the included angle of the inner roll width guide hole β5 = 15°.

[0018] In a further optimized configuration, the deflection direction of the inner roller guide holes alternates between opposite directions between adjacent cooling tanks. Specifically: β1 = 15° or 45°, cooling water deflects from the first cooling tank in the first direction and enters the second cooling tank; β2 = 30°, cooling water deflects from the second cooling tank in the second direction opposite to the first direction and enters the third cooling tank; β3 = 30°, cooling water deflects from the third cooling tank in the third direction opposite to the second direction and enters the fourth cooling tank; β4 = 30°, cooling water deflects from the fourth cooling tank in the fourth direction opposite to the third direction and enters the fifth cooling tank; β5 = 15°, cooling water deflects from the fifth cooling tank in the fifth direction opposite to the fourth direction and enters the sixth cooling tank.

[0019] In a further optimized manner, the deflection directions alternate in the following order: the first direction is clockwise deflection β1, the second direction is counterclockwise deflection β2, the third direction is clockwise deflection β3, the fourth direction is counterclockwise deflection β4, and the fifth direction is clockwise deflection β5.

[0020] In a further optimized version, the sixth-stage cooling tank flows out of the cooling water system after being deflected by a guide channel at the outlet end by 15° or 45°.

[0021] Further optimization involves 1-6 inner roller guide holes on each support strip.

[0022] Further optimized, the number of inner roller guide holes on each support strip is 4, and they are evenly distributed along the circumference of the support strip.

[0023] Further optimized, the diameter of the guide hole is 23mm.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0025] 1. This invention employs a novel cooling water system designed on the roller sleeve. Compared to traditional roller sleeves where cooling water only flows within a spiral ring on the outer surface of the mandrel, this system effectively increases the heat exchange area and allows for deeper contact between the water and the roller sleeve, which experiences the highest temperature during continuous casting. This enables the cooling water to more effectively remove heat from the roller sleeve, significantly improving the cooling effect of dry continuous casting rollers. The synergistic effect of the multi-stage cooling tanks, guide channels, and inner roller width guide holes in this invention, through multi-stage turbulence design, induces fluid flow separation and vortices, ensuring thorough mixing of fluids at different temperatures and significantly improving cooling efficiency.

[0026] 2. When the included angle β is between 15° and 45°, this utility model achieves periodic abrupt changes in the cooling water flow direction and drastic changes in the flow velocity gradient through the alternating deflection structure of the multi-stage through-type cooling groove and guide hole set inside the roller sleeve body, completely breaking the traditional laminar flow-dominated flow mode of roller sleeves.

[0027] The multi-stage through-type cooling tanks and the inner roller guide holes on the support strips form multi-stage series of independent flow chambers. When the cooling water flows through adjacent guide holes, the flow direction is forcibly changed due to the included angle β of 15°-45°, causing flow separation and generating high-intensity vortices. Experimental data shows that this design causes the flow direction of the cooling water to change ≥6 times between adjacent cooling tanks, significantly enhancing fluid turbulence, significantly improving the heat transfer coefficient, and improving the heat transfer effect and cooling effect of the roller sleeve.

[0028] 3. Furthermore, when adjacent flow guide holes are deflected alternately in opposite directions (e.g., clockwise → counterclockwise), secondary flow is generated in the transverse and longitudinal directions, which fully mixes the fluids in different temperature layers and further improves the heat exchange uniformity.

[0029] 4. Four circumferentially distributed φ23mm guide holes are set on each support plate. While ensuring the uniformity of water flow distribution, the stress concentration is avoided by optimizing the hole spacing, thereby improving the overall bending strength of the roller sleeve. [Attached Image Description]

[0030] Figure 1 This utility model presents a cross-sectional structural diagram of a multi-stage cooling turbulence water channel dry continuous casting roll sleeve.

[0031] Figure 2 This utility model presents a schematic diagram of the water flow after the installation of the multi-stage cooling turbulence water channel dry continuous casting roll sleeve and mandrel.

[0032] Figure 3 A schematic diagram of the supporting strip of the continuous casting roll sleeve of this utility model;

[0033] Figure 4 Another structural schematic diagram of the support flap of the continuous casting roll sleeve of this utility model;

[0034] Figure 5 Another structural schematic diagram of the support flap of the continuous casting roll sleeve of this utility model;

[0035] Figure 6 Figure 1 Schematic diagram of the included angle β at point A;

[0036] In the attached diagram, 1-roller sleeve body, 2-multi-stage cooling tank, 3-supporting strip, 4-inner roller width guide hole, 51-inlet end guide groove, 52-outlet end guide groove, 21-first stage cooling tank, 22-second stage cooling tank, 23-third stage cooling tank, 24-fourth stage cooling tank, 25-fifth stage cooling tank, 26-sixth stage cooling tank, β-angle β, L-roller sleeve central axis, L1-line connecting the center points of the two guide holes, L2-baseline.

Detailed Implementation Methods

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Please refer to Figures 1 to 6 .

[0041] Example 1

[0042] Please refer to Figures 1 to 2 In this embodiment, the roller sleeve is fitted onto the mandrel 6 during use. Figure 1 The middle section is a schematic diagram of the cross-sectional structure along the central axis with the mandrel 11 assembled. The cooling water system, when the mandrel is not installed, has multiple cooling tanks connected by guide holes 4, through which cooling water flows. After the roller sleeve is assembled with the mandrel, the multiple cooling tanks 2 and the mandrel surface form a closed cooling water tank space. Specifically, this space allows cooling water to flow on the mandrel surface and within the roller sleeve. Cooling water can flow through the guide holes 4 in each cooling water tank space, forming the cooling water system used after assembly.

[0043] This invention provides a multi-stage cooling turbulence water channel dry continuous casting roll sleeve, including a roll sleeve body 1, wherein the roll sleeve body 1 is provided with a cooling water channel system, the cooling water channel system including:

[0044] Multi-stage cooling tank 2: N through-type cooling tanks distributed sequentially along the roller sleeve axis form the first to Nth stage cooling tanks, where N≥2, and adjacent cooling tanks are separated by support panels 3;

[0045] Water inlet guide groove 51: It is set at the water inlet end of the roller sleeve body 1 and is connected to the first-stage cooling groove 21;

[0046] Water outlet guide groove 52: It is set at the water outlet end of the roller sleeve body 1 and is connected to the Nth stage cooling tank 26;

[0047] Inner roll guide hole 4: set on the support strip 3, for cooling water to flow in or out; the inner roll guide holes 4 on adjacent support strips 3 form an included angle β, the two sides of the included angle β are: the line L1 connecting the center points of the two guide holes 4, and the reference line L2 with the center point of any guide hole 4 as the starting point and parallel to the central axis L of the roll sleeve, the included angle β is 0°-65°.

[0048] The included angle β affects the internal flow direction and the cooling effect, but it does not affect the water flow and achieves the purpose of cooling and heat exchange. It can vary in any range from 0° to 65°. Even when β is 0°, turbulence will occur because adjacent cooling tanks can only pass through the guide hole. In a further optimized embodiment, the included angle β is 1°-65°.

[0049] In a further optimized embodiment, the included angle β is 15°-45°, the internal water flow effect is better, and a better cooling effect can be achieved; in a further optimized embodiment, the number of inner roller guide holes 4 on each support strip 3 is 1-6.

[0050] During operation, cooling water enters the first-stage cooling tank 21 from the inlet guide channel 51, is deflected by the inner roller guide holes 4, flows through all the cooling tanks, and is discharged from the outlet guide channel 52. The deflection design of the inner roller guide holes 4 generates turbulence in the cooling water during flow, improving cooling efficiency.

[0051] Example 2

[0052] Please refer to Figures 1 to 6 In this embodiment, a dry continuous casting roll sleeve with N=6 and six-stage cooling water channels is specifically provided. The roll sleeve body 1 is equipped with a cooling water channel system, which includes:

[0053] Six-stage cooling tank 2: Six through-type cooling tanks distributed sequentially along the roller sleeve axis form the first to sixth stage cooling tanks, and adjacent cooling tanks are separated by support panels 3;

[0054] Water inlet guide groove 51: It is set at the water inlet end of the roller sleeve body 1 and is connected to the first-stage cooling groove 21;

[0055] Water outlet guide groove 52: It is set at the water outlet end of the roller sleeve body 1 and is connected to the sixth stage cooling tank 26;

[0056] Inner roll guide hole 4: set on the support strip 3, for cooling water to flow in or out; the inner roll guide holes 4 on adjacent support strips 3 form an included angle β, the two sides of the included angle β are: the line L1 connecting the center points of the two guide holes 4, and the reference line L2 with the center point of any guide hole 4 as the starting point and parallel to the central axis L of the roll sleeve, the included angle β is 15°-45°.

[0057] Cooling water sequentially enters the first-stage cooling tank 21 through the inlet guide channel 51, then deflects at an angle β1 through the inner roller guide holes to reach the second-stage cooling tank 22; after deflecting at an angle β2 through the inner roller guide holes to reach the third-stage cooling tank 23; after deflecting at an angle β3 through the inner roller guide holes to reach the fourth-stage cooling tank 24; after deflecting at an angle β4 through the inner roller guide holes to reach the fifth-stage cooling tank 25; after deflecting at an angle β5 through the inner roller guide holes to reach the sixth-stage cooling tank 26; and finally flows out of the cooling water system of the roller sleeve through the outlet guide channel 52.

[0058] In a further optimized embodiment, the included angle β1 of the inner roll width guide hole is 15° or 45°, the included angle β2 of the inner roll width guide hole is 30°, the included angle β4 of the inner roll width guide hole is 30°, and the included angle β5 of the inner roll width guide hole is 15°.

[0059] In a further optimized embodiment, the deflection direction of the inner roller guide hole alternates between opposite directions between adjacent cooling tank stages, specifically:

[0060] β1 = 15° or 45°, and the cooling water deflects from the first-stage cooling tank 21 in the first direction and then enters the second-stage cooling tank 22;

[0061] β2 = 30°, cooling water deflects from the second-stage cooling tank 22 to the second direction opposite to the first direction and enters the third-stage cooling tank 23; β3 = 30°, cooling water deflects from the third-stage cooling tank 23 to the third direction opposite to the second direction and enters the fourth-stage cooling tank 24; β4 = 30°, cooling water deflects from the fourth-stage cooling tank 24 to the fourth direction opposite to the third direction and enters the fifth-stage cooling tank 25; β5 = 15°, cooling water deflects from the fifth-stage cooling tank 25 to the fifth direction opposite to the fourth direction and enters the sixth-stage cooling tank 26.

[0062] In a further optimized embodiment, the deflection directions alternate in the following order: the first direction is clockwise deflection β1, the second direction is counterclockwise deflection β2, the third direction is clockwise deflection β3, the fourth direction is counterclockwise deflection β4, and the fifth direction is clockwise deflection β5. In a further optimized embodiment, the sixth-stage cooling tank 26 flows out of the cooling water system after being deflected by 15° or 45° by the outlet guide channel 52.

[0063] During operation, cooling water enters the first-stage cooling tank 21 from the inlet guide channel 51, and then deflects through the guide holes 4 to enter the subsequent cooling tanks 22-26. The specific flow path is as follows: first stage → second stage: clockwise deflection 30°; second stage → third stage: counterclockwise deflection 30°; third stage → fourth stage: clockwise deflection 30°; fourth stage → fifth stage: counterclockwise deflection 30°; fifth stage → sixth stage: clockwise deflection 30°. Repeating the above alternating deflection can create a strong turbulent flow effect, thereby enhancing the heat exchange of cooling water in the same cooling tank, improving the overall cooling effect, and finally flowing out from the outlet guide channel 52.

[0064] The number of inner roller guide holes 4 on each support strip 3 is 4, or it can be any one to 6, and they can be arbitrarily distributed, but a uniform distribution along the circumference of the support strip 3 is the best. In this embodiment, the diameter of the guide hole 4 is 20-30mm, and 23mm is selected in this embodiment.

[0065] When the number of inner roller guide holes 4 is 2, 3, 4, 5, or 6, the flow separation effect is further aggravated, forming multi-directional vortices in each cooling tank.

[0066] Example 3

[0067] Based on Example 2, the deflection directions in this embodiment can also alternate in the following order: the first direction is counterclockwise deflection β1, the second direction is clockwise deflection β2, the third direction is counterclockwise deflection β3, the fourth direction is clockwise deflection β4, and the fifth direction is counterclockwise deflection β5.

[0068] The sixth-stage cooling tank 26 flows out of the cooling water system after being deflected by the outlet guide channel 52 by 15° or 45°.

[0069] The number of inner roller guide holes 4 on each support strip 3 is 4, and they are evenly distributed along the circumference of the support strip 3. They can also be any one to six, and can be distributed arbitrarily, but an even distribution along the circumference of the support strip 3 is the best.

[0070] When the number of inner roller guide holes 4 is 2, 3, 4, 5, or 6, the flow separation effect is further aggravated, forming multi-directional vortices in each cooling tank. In this embodiment, the diameter of the guide holes 4 is 20-30 mm, and 25 mm is selected in this embodiment.

[0071] Example 4

[0072] In this embodiment, a four-stage cooling water channel dry continuous casting roll sleeve with N=4 is specifically provided. The roll sleeve body 1 is provided with a cooling water channel system, which includes:

[0073] Fourth-level cooling tank 2: Four through-type cooling tanks distributed sequentially along the roller sleeve axis form the first to fourth-level cooling tanks, and adjacent cooling tanks are separated by support panels 3;

[0074] Water inlet guide groove 51: It is set at the water inlet end of the roller sleeve body 1 and is connected to the first-stage cooling groove 21;

[0075] Water outlet guide groove 52: It is set at the water outlet end of the roller sleeve body 1 and is connected to the fourth stage cooling tank 24;

[0076] Inner roll guide hole 4: set on the support strip 3, for cooling water to flow in or out; the inner roll guide holes 4 on adjacent support strips 3 form an included angle β, the two sides of the included angle β are: the line L1 connecting the center points of the two guide holes 4, and the reference line L2 with the center point of any guide hole 4 as the starting point and parallel to the central axis L of the roll sleeve, the included angle β is 15°-45°.

[0077] Cooling water sequentially enters the first-stage cooling tank 21 through the inlet guide channel 51, and after being deflected by the included angle β1 of the inner roller width guide holes, it reaches the second-stage cooling tank 22; after being deflected by the included angle β2 of the inner roller width guide holes, it reaches the third-stage cooling tank 23; after being deflected by the included angle β3 of the inner roller width guide holes, it reaches the fourth-stage cooling tank 24; and finally flows out of the cooling water system of the roller sleeve through the outlet guide channel 52.

[0078] In a further optimized embodiment, the deflection direction of the inner roller guide hole alternates between opposite directions between adjacent cooling tank stages, specifically:

[0079] β1 = 15° or 45°, and the cooling water deflects from the first-stage cooling tank 21 in the first direction and then enters the second-stage cooling tank 22;

[0080] β2 = 30°, the cooling water deflects from the second-stage cooling tank 22 to the second direction opposite to the first direction and then enters the third-stage cooling tank 23;

[0081] β3 = 30°, the cooling water deflects from the third-stage cooling tank 23 to the third direction opposite to the second direction and enters the fourth-stage cooling tank 24; the fourth-stage cooling tank 24 flows out of the cooling water system after being deflected by the outlet guide channel 52 by 15° or 45°.

[0082] In a further optimized embodiment, the deflection directions alternate in the following order: the first direction is clockwise or counterclockwise deflection β1, the second direction is counterclockwise or clockwise deflection β2, and the third direction is clockwise or counterclockwise deflection β3. The number of inner roller guide holes 4 on each support strip 3 is 4, or it can be any one to 6, and they can be arbitrarily distributed, but a uniform distribution along the circumference of the support strip 3 is optimal.

[0083] During operation, cooling water enters the first-stage cooling tank 21 from the inlet guide channel 51, and then deflects through the guide holes 4 to enter the subsequent cooling tanks 22-24. The specific flow path is as follows: first stage → second stage: clockwise deflection 30°; second stage → third stage: counterclockwise deflection 30°; third stage → fourth stage: clockwise deflection 30°, and finally flows out from the outlet guide channel 52.

[0084] The support sheet 3 in this invention can be formed by lathe machining or by welding roller sleeves.

[0085] 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 multi-stage cooling turbulent flow waterway dry-type continuous casting roll cover characterized by, Includes a roller sleeve body (1), wherein the roller sleeve body (1) is provided with a cooling water system, the cooling water system including: Multi-stage cooling tank (2): N through-type cooling tanks distributed sequentially along the roller sleeve axis form the first to Nth stage cooling tanks, where N≥2, and adjacent cooling tanks are separated by support panels (3); Water inlet guide groove (51): It is set at the water inlet end of the roller sleeve body (1) and is connected to the first-stage cooling tank (21); Water outlet guide groove (52): It is set at the water outlet end of the roller sleeve body (1) and is connected to the Nth stage cooling tank; Inner roll width guide hole (4): set on the support web (3) for cooling water to flow in or out; the inner roll width guide holes (4) on adjacent support webs (3) form an included angle β, the two sides of the included angle β are: the line connecting the center points of the two guide holes (4) (L1), and the reference line (L2) with the center point of any guide hole (4) as the starting point and parallel to the central axis (L) of the roll sleeve, the included angle β is 0°-65°.

2. A multi-stage cooling turbulence waterway dry-type continuous casting roller cover according to claim 1, characterized in that, The included angle β is 15°-45°.

3. The multi-stage cooling turbulence water channel dry continuous casting roll sleeve according to claim 1, characterized in that, With N=6, the cooling water sequentially enters the first-stage cooling tank (21) through the inlet guide channel (51), and after being deflected by the included angle β1 of the inner roller guide holes, it reaches the second-stage cooling tank (22); after being deflected by the included angle β2 of the inner roller guide holes, it reaches the third-stage cooling tank (23); after being deflected by the included angle β3 of the inner roller guide holes, it reaches the fourth-stage cooling tank (24); after being deflected by the included angle β4 of the inner roller guide holes, it reaches the fifth-stage cooling tank (25); after being deflected by the included angle β5 of the inner roller guide holes, it reaches the sixth-stage cooling tank (26); and finally, it flows out of the cooling water system of the roller sleeve through the outlet guide channel (52).

4. The multi-stage cooling turbulence water channel dry continuous casting roll sleeve according to claim 3, characterized in that, The included angle of the inner roll width guide hole β1 = 15° or 45°, the included angle of the inner roll width guide hole β2 = 30°, the included angle of the inner roll width guide hole β4 = 30°, and the included angle of the inner roll width guide hole β5 = 15°.

5. The multi-stage cooling turbulence water channel dry continuous casting roll sleeve according to claim 3, characterized in that: The deflection direction of the inner roller guide holes alternates between opposite directions between adjacent cooling tanks, specifically: β1 = 15° or 45°, the cooling water deflects from the first-stage cooling tank (21) to the first direction and then enters the second-stage cooling tank (22); β2 = 30°, the cooling water deflects from the second-stage cooling tank (22) to the second direction opposite to the first direction and then enters the third-stage cooling tank (23); β3 = 30°, the cooling water deflects from the third-stage cooling tank (23) to the third direction opposite to the second direction and then enters the fourth-stage cooling tank (24); β4 = 30°, the cooling water deflects from the fourth stage cooling tank (24) to the fourth direction opposite to the third direction and then enters the fifth stage cooling tank (25); β5 = 15°, and the cooling water deflects from the fifth cooling tank (25) to the fifth direction, which is opposite to the fourth direction, and then enters the sixth cooling tank (26).

6. The multi-stage cooling turbulence water channel dry continuous casting roll sleeve according to claim 5, characterized in that, The deflection directions alternate in the following order: the first direction is clockwise deflection β1, the second direction is counterclockwise deflection β2, the third direction is clockwise deflection β3, the fourth direction is counterclockwise deflection β4, and the fifth direction is clockwise deflection β5.

7. The multi-stage cooling turbulence water channel dry continuous casting roll sleeve according to claim 3, characterized in that, The sixth-stage cooling tank (26) flows out of the cooling water system after being deflected by the outlet guide channel (52) by 15° or 45°.

8. The multi-stage cooling turbulence water channel dry continuous casting roll sleeve according to claim 1, characterized in that, The number of inner roller guide holes (4) on each support strip (3) is 1-6.

9. The multi-stage cooling turbulence water channel dry continuous casting roll sleeve according to claim 6, characterized in that, The number of inner roller guide holes (4) on each support strip (3) is 4, and they are evenly distributed along the circumference of the support strip (3).

10. The multi-stage cooling turbulence water channel dry continuous casting roll sleeve according to claim 1, characterized in that, The diameter of the guide hole (4) is 23 mm.

Images