A water-cooled long roller system for continuous casting rollers and a cooling method thereof

Abstract

The present invention discloses a water-cooled long roller system for a continuous casting roller and a cooling method thereof, which belongs to the field of continuous casting roller cooling. The system of the present invention includes a roller body, an inner water pipe is provided in the inner cavity of the roller body, and a gap channel is formed between the outer wall of the inner water pipe and the inner wall of the roller body; an inner spacer tube is also provided in the gap channel surrounding the outer periphery of the inner water pipe, and a cooling channel is formed between the outer wall of the inner spacer tube and the inner wall of the roller body; water trough baffles are provided at both ends of the inner spacer tube, and the water trough baffles are sleeved on the outer side of the inner water pipe, and the water trough baffles extend to be able to close the middle layer gap formed between the inner water pipe and the inner spacer tube, so that the inner cavity of the inner water pipe can be connected to the cooling channel, but not connected to the middle layer gap. The present invention greatly reduces the cross-sectional area of ​​the cooling channel, so that the water flow in the cooling channel is in a turbulent state, effectively increasing the heat exchange efficiency of the cooling water, thereby reducing the adhesion and friction on the surface of the casting, and improving the surface quality of the casting.

Description

Technical Field

[0001] The present invention relates to the technical field of continuous casting roller cooling, and more particularly to a continuous casting roller water-cooling long roller system and a cooling method thereof. Background Art

[0002] As a key component of a continuous casting machine, the quality and lifespan of the continuous casting roller directly impact product cost, billet quality, and the machine's operating rate. The rollers directly contact the high-temperature billet and are exposed to the heat radiation of the billet for extended periods, which can easily lead to failures such as thermal stress fatigue cracks and deformation. This can cause the roller surface to adhere to the billet, leading to roll damage. Therefore, cooling the rollers is necessary to reduce their surface temperature.

[0003] Currently, continuous casting roller cooling typically involves installing a rotary joint at the end of the roller table. An internal water pipe connected to the water inlet of the rotary joint is installed within the roller table. The cavity between the internal water pipe and the roller body serves as a cooling water flow channel, and this flow channel is connected to the water outlet of the rotary joint. After entering the internal water pipe, the cooling water flows through the cavity between the internal water pipe and the roller body, utilizing the circulating cooling water flow in the cavity between the internal water pipe and the roller body for cooling. However, in practice, this traditional cooling method generally results in a slow circulating cooling water flow rate, resulting in a low heat exchange coefficient between the circulating cooling water flow and the roller body. This results in suboptimal roller surface cooling, and the surface temperature of the roller sleeve cannot be reduced sufficiently. This also causes defects in the surface quality of the ingot and its side surfaces, making it difficult to meet the application requirements of continuous casting machines.

[0004] As disclosed in the prior art, a cooling water circulation device for a continuous casting roll group is provided with a first water inlet and a first water outlet on the outer side of the rotary joint, a first through hole and a second through hole are provided inside the core shaft in the axial direction, a first cooling pipe and a second cooling pipe are provided in the first through hole and the second through hole respectively, the first water inlet is connected to the first cooling pipe, and the first water outlet is connected to the second cooling pipe; this design also helps to improve the cooling and crystallization effects of the continuous casting roll group, but in practice there is still room for further optimization and improvement. Summary of the Invention

[0005] 1. Technical problem to be solved by the invention

[0006] In view of the situation in the prior art that the cooling effect of continuous casting rollers and continuous casting rollers is insufficient and easily causes quality defects of the cast billets, the present invention intends to provide a water-cooled long roller system for a continuous casting roller and a cooling method thereof, which can further improve the cooling efficiency of the cooling water in the roller, help to improve the surface quality of the continuous casting billets, and extend the service life of the long roller roller.

[0007] 2. Technical solution

[0008] In order to achieve the above object, the technical solution provided by the present invention is:

[0009] A water-cooled long roller system for a continuous casting roller table according to the present invention includes a roller body, an inner cavity is provided in the roller body, an inner water pipe is provided in the inner cavity of the roller body, and a gap channel is formed between the outer wall of the inner water pipe and the inner wall of the roller body; in particular, an inner spacer tube is also provided in the gap channel surrounding the outer periphery of the inner water pipe, and a cooling flow channel is formed between the outer wall of the inner spacer tube and the inner wall of the roller body; water trough baffles are provided at both ends of the inner spacer tube, the water trough baffles are sleeved on the outside of the inner water pipe, and the water trough baffles extend to be able to close the middle layer gap formed between the inner water pipe and the inner spacer tube, so that the inner cavity of the inner water pipe can be connected to the cooling flow channel instead of being connected to the middle layer gap.

[0010] Furthermore, the water trough baffle is an annular baffle coaxially distributed with the inner water pipe, and the water trough baffle extends from the outer wall of the inner water pipe to fit the inner wall of the roller body; the water trough baffle is provided with a water trough running through the axial thickness of the water trough baffle at a position located in the cooling channel area;

[0011] Or / and, the radial width between the outer wall of the inner partition tube and the inner wall of the roller body is not greater than the radial width between the outer wall of the inner water pipe and the inner wall of the inner partition tube.

[0012] Furthermore, the roller shaft head at one end of the roller body is installed in cooperation with the rotary joint; the rotary joint has an inner sleeve and an outer sleeve, and a water outlet channel is formed between the inner sleeve and the outer sleeve; the water inlet of the rotary joint is connected to the inner cavity of the inner sleeve, and the water outlet of the rotary joint is connected to the water outlet channel; the inner sleeve of the rotary joint is connected to the inner cavity of the inner water pipe, and the water outlet channel of the rotary joint is connected to the cooling flow channel.

[0013] Furthermore, a plurality of water troughs are provided at intervals along the circumference of the upper edge of the water trough baffle. The water troughs extend from the outer edge of the water trough baffle toward the inner side close to the inner water pipe, and the extension depth does not exceed the position of the inner partition pipe.

[0014] Furthermore, multiple groups of roller sleeves are provided on the roller body at intervals along the axial direction, and the roller sleeves are detachably connected to the roller body; and each group of roller sleeves includes two roller sleeves distributed at intervals, and the axial spacing between the two roller sleeves in the same group is adapted to the width of each strand of the continuous casting machine.

[0015] Furthermore, the roller sleeve includes an upper roller sleeve and a lower roller sleeve that are wrapped around the outer periphery of the roller body. The upper roller sleeve is fixed to the outer wall of the roller body by a connecting key, and the upper roller sleeve and the lower roller sleeve are respectively provided with mounting holes, and fasteners are fitted through the mounting holes to fasten the upper roller sleeve and the lower roller sleeve together.

[0016] Furthermore, a shaft sleeve is provided on the outer periphery of the inner sleeve of the rotary joint, and a sleeve is provided on the outer periphery of the end of the inner water pipe close to the rotary joint. The sleeve and the shaft sleeve fit tightly together to seal the gap between the inner sleeve and the inner water pipe; and a water passage is provided on the sleeve that passes through the sleeve in the axial direction, and the water passage connects the cooling channel with the water outlet channel of the rotary joint.

[0017] Furthermore, one end of the sleeve close to the rotary joint is abutted against a retaining ring, and the retaining ring is used to prevent axial movement of the sleeve.

[0018] Furthermore, both ends of the inner water pipe extend into the roller shaft at the end of the roller body respectively, and there is a radial gap for the water supply channel between the outer wall of the inner water pipe and the inner wall of the roller shaft. In addition to the water outlet at the end of the inner water pipe away from the rotary joint, a penetrating water outlet is also provided on the circumferential wall of the inner water pipe, and the water outlet connects the inner cavity of the inner water pipe with the cooling channel.

[0019] The present invention also provides a cooling method for a water-cooled long roller system of a continuous casting roller. The above-mentioned water-cooled long roller system of the continuous casting roller is adopted. When in use, a rotary joint is provided at one end of the roller body. The cooling water enters the internal water pipe through the water inlet of the rotary joint and flows out to the inner cavity of the roller body through the other end of the internal water pipe. Since the internal water pipe and the internal spacer are closed, the cooling water enters the cooling flow channel through the water trough baffle and refluxes, and is finally discharged through the water outlet of the rotary joint.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0022] (1) The water-cooled long roller system of the continuous casting roller of the present invention greatly reduces the cross-sectional area of ​​the cooling channel by arranging an inner spacer and a water trough baffle, forming a narrower channel, so that the water flow in the cooling channel is in a turbulent state, the flow rate of the cooling water is increased, and the heat exchange efficiency of the cooling water is effectively increased. The circulating cooling water and the heat flow of the inner wall of the roller are fully exchanged and well and evenly cooled, and the surface temperature of the roller is effectively reduced, thereby reducing the adhesion and friction on the surface of the casting, and improving the surface quality of the casting.

[0023] (2) In the water-cooled long roller system of the continuous casting roller table of the present invention, the outer periphery of the inner sleeve of the rotary joint is tightly fitted with a shaft sleeve, the outer periphery of the end of the inner water pipe close to the rotary joint is tightly fitted with a sleeve, and one end of the sleeve close to the rotary joint is abutted with a retaining ring, which is used to prevent the axial movement of the sleeve; this can effectively prevent the radial and axial movement of the inner water pipe, ensure the coaxiality of the connection between the rotary joint and the inner water pipe, and improve the matching accuracy, sealing performance and service life of the two.

[0024] (3) The water-cooled long roller system of the continuous casting roller of the present invention is equipped with a replaceable roller sleeve on the roller body, so that the casting does not directly contact the surface of the roller body, but contacts the roller sleeve. When the roller sleeve is worn, the roller sleeve can be quickly replaced to avoid damage to the roller body, greatly reducing maintenance costs and saving labor costs, and is convenient for maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the cross-sectional structure of the water-cooled long roller system of the continuous casting roller in an embodiment of the present invention;

[0026] Figure 2 Schematic diagram of the top view of the water-cooled long roller system of the continuous casting roller in an embodiment of the present invention;

[0027] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the middle BB section;

[0028] Figure 4 for Figure 1 Schematic diagram of the local enlarged structure in the middle C area;

[0029] Figure 5 for Figure 1 Schematic diagram of the local enlarged structure at the D area in the middle;

[0030] Figure 6 for Figure 1 Schematic diagram of the locally enlarged structure in area E in the middle.

[0031] Explanation of the numbers in the schematic diagram:

[0032] 100, rotary joint; 101, inner sleeve; 102, outer sleeve; 103, shaft sleeve; 104, retaining ring; 105, sleeve;

[0033] 200, free end bearing seat assembly;

[0034] 300, roller body; 310, roller sleeve; 311, upper roller sleeve; 312, lower roller sleeve; 313, fastener; 314, connecting key; 320, web; 330, roller shaft;

[0035] 400. Internal water pipe;

[0036] 500, fixed end bearing seat assembly;

[0037] 600, inner spacer; 610, water trough baffle; 611, water trough;

[0038] 701, internal water pipe flow channel; 702, middle layer gap; 703, cooling flow channel. DETAILED DESCRIPTION

[0039] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0040] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] The present invention will be further described below with reference to the embodiments.

[0042] Example

[0043] Combine Figures 1-6 As shown, this embodiment provides a water-cooled long roller system for a continuous casting roller, including a roller body 300, wherein the roller body 300 is provided with an inner cavity, an inner water pipe 400 is provided in the inner cavity of the roller body 300, and the inner cavity of the inner water pipe 400 is the inner water pipe flow channel 701; a gap channel is formed between the outer wall of the inner water pipe 400 and the inner wall of the roller body 300; in particular, an inner spacer tube 600 surrounding the outer circumference of the inner water pipe 400 is further provided in the gap channel, and the inner spacer tube 600 divides the gap channel between the outer wall of the inner water pipe 400 and the inner wall of the roller body 300 into two parts, wherein the inner spacer tube 600 is the inner water pipe flow channel 701. A cooling channel 703 is formed between the outer wall of the tube 600 and the inner wall of the roller body 300, and a middle gap 702 is formed between the outer wall of the inner water pipe 400 and the inner wall of the inner partition tube 600; water trough baffles 610 are provided at both ends of the inner partition tube 600, and the water trough baffles 610 are sleeved on the outside of the inner water pipe 400, and the water trough baffles 610 extend to be able to close the middle gap 702 formed between the inner water pipe 400 and the inner partition tube 600, so that the inner cavity of the inner water pipe 400 can be connected to the cooling channel 703, but not to the middle gap 702.

[0044] In the traditional technology, the roller body 300 is cooled by injecting cooling water from one end of the inner water pipe 400, and then flowing out from the other end of the inner water pipe 400 to the gap channel between the inner water pipe 400 and the roller body 300. In this case, the water flow cross-section is large, especially for multi-machine and multi-stream continuous casting rollers. The roller body 300 is long, the water flow speed is slow and is in a laminar state, the heat exchange coefficient between the cooling water flow and the roller body 300 is low, the cooling effect of the roller body 300 surface is not ideal, and the surface temperature cannot be reduced to a limited extent, which also causes the surface quality of the ingot surface and side surfaces to deteriorate.

[0045] In this embodiment, by arranging an inner spacer tube 600 and a water trough baffle 610, the gap channel between the traditional inner water pipe 400 and the roller body 300 is divided into two parts, one part is a closed middle layer gap 702, and the other part is a cooling channel 703 for effective flow. It is further preferred that the radial width between the outer wall of the inner spacer tube 600 and the inner wall of the roller body 300 is not greater than the radial width between the outer wall of the inner water pipe 400 and the inner wall of the inner spacer tube 600, or even significantly smaller than the radial width between the outer wall of the inner water pipe 400 and the inner wall of the inner spacer tube 600, so that the cross-sectional area of ​​the cooling channel 703 is greatly reduced, forming a narrower channel, so that the water flow in the cooling channel 703 is in a turbulent state, the flow rate of the cooling water is increased, and the heat exchange efficiency of the cooling water is effectively increased. The circulating cooling water and the heat flow of the inner wall of the roller body 300 are fully exchanged and well and evenly cooled, and the surface temperature of the roller body 300 is effectively reduced, thereby reducing the adhesion and friction on the surface of the casting, and improving the surface quality of the casting.

[0046] As an example embodiment, specifically, Figure 3 , the water trough baffle 610 is an annular baffle coaxially distributed with the inner water pipe 400, and the water trough baffle 610 extends from the outer wall of the inner water pipe 400 to fit with the inner wall of the roller body 300; the water trough baffle 610 is located in the cooling channel 703 area and is provided with a water trough 611 that runs through its axial thickness; the water trough 611 is used to enable the inner cavity of the inner water pipe 400 to maintain a communication state with the cooling channel 703. In practice, it is optional to provide a plurality of groups of water troughs 611 on the water trough baffle 610 at intervals along the circumferential direction, and the water troughs 611 extend from the outer edge of the water trough baffle 610 to the inner side close to the inner water pipe 400, and the extension depth does not exceed the position of the inner spacer tube 600, thereby ensuring the sealing effect of the middle layer gap 702 and preventing the occurrence of water leakage of cooling water. Figure 3 As shown in , the water channel 611 can be selected to extend from the inner wall of the roller body 300 to the outer wall of the inner partition tube 600 to ensure that the cooling water can quickly enter and form a turbulent state.

[0047] In practice, both ends of the roller body 300 have roller shafts 330, and the end surfaces of the roller body 300 are provided with webs 320. The two ends of the roller body 300 are fixed by the bearing seat assembly. Specifically, the roller shafts 330 at both ends are installed in conjunction with the bearing seat assembly. Figure 1If the two ends of the roller body 300 are considered the free end and the fixed end, respectively, the roller shaft 330 at one free end of the roller body 300 is mounted via the free end bearing seat assembly 200, while the roller shaft 330 at the other end is mounted via the fixed end bearing seat assembly 500. Furthermore, the shaft head of the roller shaft 330 at one free end of the roller body 300 is also correspondingly connected to the rotary joint 100. The rotary joint 100 comprises an inner sleeve 101 and an outer sleeve 102, with a water outlet channel formed between the inner sleeve 101 and the outer sleeve 102. The water inlet of the rotary joint 100 is connected to the inner cavity of the inner sleeve 101, and the water outlet of the rotary joint 100 is connected to the water outlet channel. The inner sleeve 101 of the rotary joint 100 is connected to the inner cavity of the internal water pipe 400, and the water outlet channel of the rotary joint 100 is connected to the cooling channel 703. In this way, a complete cooling circuit is formed. The cooling water enters through the water inlet of the rotary joint 100, passes through the inner sleeve 101, the inner water pipe 400, the cooling channel 703, the outer sleeve 102, and is finally discharged through the water outlet of the rotary joint 100, thereby achieving effective cooling of the roller body 300.

[0048] Combine Figure 4 、 Figure 5 and Figure 6 More specifically, both ends of the inner water pipe 400 extend into the roller shaft 330 at the end of the roller body 300, and a radial gap for the water flow channel is defined between the outer wall of the inner water pipe 400 and the inner wall of the roller shaft 330. This radial gap is connected to the cooling channel 703. The water channel baffle 610 can be fixed to the outer periphery of the inner water pipe 400 by welding, and a flow gap is defined between the water channel baffle 610 and the web 320 at the end of the roller body 300. This flow gap connects the cooling channel 703 and the radial gap, allowing water to flow between the cooling channel 703 and the radial gap, as shown in FIG. Figure 5 and Figure 6 The arrows in the middle indicate the cooling water flow paths at both ends of the roller body 300. Figure 6 As shown, it can be further preferred that, in addition to the water outlet at the end of the inner water pipe 400 away from the rotary joint 100, a penetrating water outlet is also provided on the circumferential wall surface of the end of the inner water pipe 400. The water outlet connects the inner cavity of the inner water pipe 400 with the cooling channel 703, thereby accelerating the cooling water flow to quickly flow out of the inner water pipe 400, and then enter the cooling channel 703 through the radial gap between the outer wall of the inner water pipe 400 and the inner wall of the roller shaft 330, and the flow gap between the water groove baffle 610 and the end plate 320 of the roller body 300.

[0049] In order to prevent the water flow between the rotary joint 100 and the inner water pipe 400 from flowing, the sealing problem between the rotary joint 100 and the inner water pipe 400 is particularly important. Figure 4As shown, in this embodiment, the outer periphery of the inner sleeve 101 of the rotary joint 100 is tightly fitted with a sleeve 103, and the outer periphery of the end of the inner water pipe 400 close to the rotary joint 100 is tightly fitted with a sleeve 105, and the outer side of the sleeve 105 can be in contact with the inner wall of the roller 330, and the inner part of the sleeve 105 completely covers the sleeve 103 inside. The sleeve 105 and the sleeve 103 are tightly fitted to effectively seal the gap between the inner sleeve 101 and the inner water pipe 400 to ensure good sealing performance; and the sleeve 105 is provided with a water passage running through it in the axial direction. Figure 4 The middle cross-sectional view does not show the water passage, which connects the cooling channel 703 with the inner cavity of the outer sleeve 102 of the rotary joint 100, thereby realizing a complete flow circuit of cooling water on the basis of ensuring sealing, avoiding water leakage at the water inlet and outlet positions, and ensuring that the roller body 300 works normally under a good cooling effect state. The continuous casting machine roller body 300 has high cooling efficiency, uniform cooling and good cooling effect, which ultimately extends the service life of the roller body 300 and reduces maintenance costs. Furthermore, the end of the sleeve 105 close to the rotary joint 100 is against a retaining ring 104, which is used to prevent the axial movement of the sleeve 105. Figure 4 As shown, the inner wall of the roller shaft 330 may be provided with a plurality of embedded grooves to form a step portion, and the retaining ring 104 may be fixedly embedded in a certain embedded groove for fixation. The right end of the sleeve 105 is also fixed by abutting against a certain step portion, and the left end of the sleeve 105 is fixed by abutting against the retaining ring 104, thereby effectively preventing the sleeve 105 from axial movement, that is, preventing the internal water pipe 400 from radial movement and axial movement, ensuring the coaxiality of the connection between the rotary joint 100 and the internal water pipe 400, and improving the matching accuracy, sealing performance and service life of the two.

[0050] In order to further guarantee the surface quality production requirements of the casting process, when conveying the casting, the occasional sliding friction of the casting on the surface of the roller body 300 is prevented, and the sliding friction caused by the contact between the casting and the side guide plate is prevented, which leads to surface scratches or scratches on the casting, affecting the surface quality of the casting, and making it difficult to meet the process quality requirements of high-quality production of special steel. In this embodiment, a replaceable roller sleeve 310 is assembled on the roller body 300. Specifically, a plurality of groups of roller sleeves 310 are arranged at intervals along the axial direction on the roller body 300. The roller sleeves 310 and the roller body 300 are detachably connected, so that when in use, the casting does not directly contact the surface of the roller body 300, but contacts the roller sleeve 310. When the roller sleeve 310 is worn, the roller sleeve 310 can be quickly replaced, thereby avoiding damage to the roller body 300, greatly reducing maintenance costs and saving labor costs, and making maintenance and replacement convenient; and the excellent cooling effect on the roller body 300 can also ensure a good cooling effect on the roller sleeve 310, thereby ensuring the processing quality of the casting; combined with Figure 1 and Figure 2As shown, each group of roller sleeves 310 includes two roller sleeves 310 spaced apart. The axial spacing between the two roller sleeves 310 in the same group is adapted to the width of each strand of the continuous casting machine. This makes the design more suitable for the continuous casting roller table scenario of a multi-machine and multi-strand continuous casting machine, such as Figure 1 The figure shows a five-machine five-stream continuous casting roller table. The roller body 300 is longer and has higher requirements for surface cooling effect. Figure 3 As shown, in certain embodiments, the roller sleeve 310 may include an upper roller sleeve 311 and a lower roller sleeve 312 that fit around the outer circumference of the roller body 300. The upper roller sleeve 311 is secured to the outer wall of the roller body 300 via a connecting key 314 to prevent radial sliding. Mounting holes are provided on both the upper roller sleeve 311 and the lower roller sleeve 312. Fasteners 313, such as fastening bolts or screws, pass through the mounting holes to securely connect the upper roller sleeve 311 and the lower roller sleeve 312. The upper roller sleeve 311 and the lower roller sleeve 312 may be made of ductile iron. The graphite in ductile iron exists in spherical form, forming a thin lubricating film on the material surface. This reduces direct contact and friction between the billet and the roller sleeve 310, and prevents adhesion to the billet, especially when heated, thereby preventing surface defects caused by contact and friction in the billet. It is more preferred that the upper roller sleeve 311 and the lower roller sleeve 312 are made of ductile iron material QT450-10. Since the thermal expansion coefficient of the QT450-10 material is smaller than the coefficient of the steel of the roller body 300, the roller sleeve 310 and the roller body 300 can maintain good interference fit performance when heated. Then, through the connection of the connecting key 314, it is well ensured that the roller sleeve 310 and the roller body 300 do not slide radially, and can be used for a long time.

[0051] This embodiment also provides a cooling method for the above-mentioned continuous casting roller water-cooled long roller system. When in use, a rotary joint 100 is provided at one end of the roller body 300. The cooling water enters the inner water pipe 400 through the water inlet of the rotary joint 100 and flows out to the inner cavity of the roller body 300 through the other end of the inner water pipe 400. Since the inner water pipe 400 and the inner spacer tube 600 are closed, the cooling water can only enter the cooling channel 703 through the water trough baffle 610 and reflux, and finally be discharged through the water outlet of the rotary joint 100.

[0052] This embodiment optimizes the unique water-cooling channel in the roller body 300 to form a well-sealed and narrow cooling channel 703 structure, so that the roller surface of the roller body 300 can be evenly and well cooled, and the cooling efficiency of the cooling water is greatly improved, which not only improves the surface quality of the continuous casting billet, but also extends the service life of the roller body 300, reduces the failure rate of the equipment and reduces maintenance costs, improves the continuous casting production efficiency and reduces production costs. It has outstanding advantages, especially for long roller bodies 300 with multiple machines and multiple streams.

[0053] The above is a schematic description of the present invention and its embodiments. This description is not restrictive and is only one embodiment of the present invention. Therefore, if a person skilled in the art is inspired by this description and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without creatively designing them, they shall fall within the scope of protection of the present invention.

Claims

1. A water-cooled long roller system for a continuous casting roller, comprising a roller body (300), an inner water pipe (400) being provided in an inner cavity of the roller body (300), and a gap channel being formed between an outer wall of the inner water pipe (400) and an inner wall of the roller body (300); Its characteristics are: An inner spacer tube (600) is further provided in the gap channel and surrounds the outer periphery of the inner water pipe (400), and a cooling channel (703) is formed between the outer wall of the inner spacer tube (600) and the inner wall of the roller body (300); water trough baffles (610) are provided at both ends of the inner spacer tube (600), and the water trough baffles (610) are sleeved on the outer side of the inner water pipe (400), and the water trough baffles (610) extend to close the middle gap (702) formed between the inner water pipe (400) and the inner spacer tube (600), so that the inner cavity of the inner water pipe (400) can be connected to the cooling channel (703) but not to the middle gap (702); The shaft head of the roller shaft (330) at one end of the roller body (300) is mounted in cooperation with the rotary joint (100); the rotary joint (100) comprises an inner sleeve (101) and an outer sleeve (102), and a water outlet channel is formed between the inner sleeve (101) and the outer sleeve (102); The inner sleeve (101) of the rotary joint (100) is sleeved with a shaft sleeve (103) on its outer periphery, and the end of the inner water pipe (400) close to the rotary joint (100) is sleeved with a sleeve (105) on its outer periphery, and the sleeve (105) and the shaft sleeve (103) are tightly matched to seal the gap between the inner sleeve (101) and the inner water pipe (400); and the sleeve (105) is provided with a water passage running through it in the axial direction, and the water passage connects the cooling channel (703) with the water outlet channel of the rotary joint (100); One end of the sleeve (105) close to the rotary joint (100) is against a retaining ring (104), and the retaining ring (104) is used to prevent the sleeve (105) from axial movement.

2. The water-cooled long roller system for continuous casting rollers according to claim 1, characterized in that: The water trough baffle (610) is an annular baffle coaxially distributed with the inner water pipe (400), and the water trough baffle (610) extends from the outer wall of the inner water pipe (400) to fit the inner wall of the roller body (300); the water trough baffle (610) is provided with a water trough (611) extending through the axial thickness of the water trough baffle (610) at a position within the cooling channel (703) area.

3. The water-cooled long roller system for continuous casting rollers according to claim 1, characterized in that: The radial width between the outer wall of the inner spacer tube (600) and the inner wall of the roller body (300) is not greater than the radial width between the outer wall of the inner water pipe (400) and the inner wall of the inner spacer tube (600).

4. The water-cooled long roller system for continuous casting rollers according to claim 1, characterized in that: The water inlet of the rotary joint (100) is connected to the inner cavity of the inner sleeve (101), and the water outlet of the rotary joint (100) is connected to the water outlet channel; the inner sleeve (101) of the rotary joint (100) is connected to the inner cavity of the inner water pipe (400), and the water outlet channel of the rotary joint (100) is connected to the cooling flow channel (703).

5. The water-cooled long roller system for continuous casting rollers according to claim 2, characterized in that: A plurality of water channels (611) are provided at intervals along the circumferential direction on the water channel baffle (610). The water channels (611) extend from the outer edge of the water channel baffle (610) toward the inner side close to the inner water pipe (400), and the extension depth does not exceed the position of the inner spacer pipe (600).

6. A water-cooled long roller system for continuous casting rollers according to any one of claims 1 to 5, characterized in that: A plurality of groups of roller sleeves (310) are provided on the roller body (300) at intervals along the axial direction, and the roller sleeves (310) are detachably connected to the roller body (300); each group of roller sleeves (310) includes two roller sleeves (310) distributed at intervals, and the axial spacing between the two roller sleeves (310) in the same group is adapted to the width of each strand of the continuous casting machine.

7. The water-cooled long roller system for continuous casting rollers according to claim 6, characterized in that: The roller sleeve (310) comprises an upper roller sleeve (311) and a lower roller sleeve (312) that are matched to wrap around the outer circumference of the roller body (300); the upper roller sleeve (311) and the outer wall of the roller body (300) are matched and fixed via a connecting key (314); and mounting holes are correspondingly provided on the upper roller sleeve (311) and the lower roller sleeve (312); fasteners (313) are matched to pass through the mounting holes to fasten the upper roller sleeve (311) and the lower roller sleeve (312) together.

8. The water-cooled long roller system for continuous casting rollers according to claim 3, characterized in that: Both ends of the inner water pipe (400) extend into the roller shaft (330) at the end of the roller body (300), and a radial gap for a water supply channel is provided between the outer wall of the inner water pipe (400) and the inner wall of the roller shaft (330). In addition to a water outlet at the end of the inner water pipe (400) away from the rotary joint (100), a penetrating water outlet is also provided on the circumferential wall of the inner water pipe (400), and the water outlet connects the inner cavity of the inner water pipe (400) with the cooling channel (703).

9. A cooling method for a water-cooled long roller system of a continuous casting roller table, characterized in that: A water-cooled long roller system for a continuous casting roller as described in any one of claims 1 to 8 is adopted, wherein a rotary joint (100) is provided at one end of the roller body (300), cooling water enters the inner water pipe (400) through the water inlet of the rotary joint (100), and flows out to the inner cavity of the roller body (300) through the other end of the inner water pipe (400). Since the inner water pipe (400) and the inner spacer (600) are sealed, the cooling water enters the cooling channel (703) through the water trough baffle (610) and refluxes, and is finally discharged through the water outlet of the rotary joint (100).

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