CN214720399U

CN214720399U - Continuous casting free roll

Info

Publication number: CN214720399U
Application number: CN202120799323.7U
Authority: CN
Inventors: 田刚
Original assignee: Sinosteel Xian Machinery Co Ltd
Current assignee: Sinosteel Xian Machinery Co Ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-11-16
Anticipated expiration: 2031-04-19

Abstract

The application discloses continuous casting free roller belongs to the roller field. The free roller comprises a first roller structure, a second roller structure and a water pipe; the roller sleeve of the water-cooled roller is sleeved in the middle of the mandrel, a water flow passage is arranged in the mandrel, and cooling water can flow from one end of the mandrel to the other end of the mandrel through the water flow passage; the end face of one end of the water-cooled roller is provided with a rotary joint, the outer side wall of the end is sleeved with a first bearing, then the first bearing seat assembly is sleeved, and the other end is sleeved with a second bearing and a second bearing seat assembly to form a first roller structure; the two ends of the water-cooled roller are sleeved with a second bearing and a second bearing seat assembly to form a second roller structure; the water flow channels of the front second roller structure and the rear second roller structure are communicated through water pipes; one end of one first roller structure is communicated with the water flow channel of the second roller structure at the head end through a water pipe, and the second roller structure at the tail end is communicated with the water flow channel at one end of the other first roller structure through a water pipe. The application is convenient to manufacture and maintain.

Description

Continuous casting free roll

Technical Field

The application relates to the technical field of rollers, in particular to a continuous casting free roller.

Background

The roller is a key part on equipment such as a thick slab continuous casting machine, and the conventional continuous casting free roller comprises a short mandrel, a roller sleeve, a water guide pipe, a bearing seat assembly and the like. One end of the front short mandrel is inserted into one end of the roller sleeve, one end of the rear short mandrel is inserted into the other end of the roller sleeve, one ends of the two short mandrels, which are positioned in the roller sleeve, are communicated through a water guide pipe, and the bearing seat assemblies are sleeved outside the short mandrels of the two adjacent roller sleeves. Therefore, the existing continuous casting free roll has strong connection among all parts, the whole continuous casting free roll needs to be manufactured and installed by considering the structure of the whole continuous casting free roll during manufacturing, and the whole continuous casting free roll needs to be disassembled for maintenance during maintenance, so that inconvenience is brought to both manufacturing and maintenance.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application can solve the problem that the conventional continuous casting free roller is inconvenient to manufacture and maintain by providing the continuous casting free roller.

The embodiment of the utility model provides a continuous casting free roll, which comprises a first roll structure, a second roll structure and a water pipe; the first roller structure comprises a water-cooled roller, a first bearing seat assembly, a rotary joint, a second bearing and a second bearing seat assembly; the second roller structure comprises a water-cooled roller, a second bearing and a second bearing seat assembly; the water cooling roller comprises a roller sleeve and a mandrel, the roller sleeve is sleeved in the middle of the mandrel, a water flow passage is arranged in the mandrel, and the water flow passage can enable cooling water to flow from one end of the mandrel to the other end of the mandrel so as to take away heat of a roller surface; the end face of one end of the water-cooled roller is provided with the rotary joint, the rotary joint is communicated with the water flow passage, the outer side wall of the end is sleeved with the first bearing, the first bearing and the outer side wall of the rotary joint are sleeved with the first bearing seat assembly, and the other end of the water-cooled roller is sleeved with the second bearing and then sleeved with the second bearing seat assembly, so that the first roller structure is formed; the two ends of the water-cooled roller are sleeved with the second bearing and then sleeved with the second bearing seat assembly, so that the second roller structure is formed; the water outlet end of the water flow channel of the previous second roller structure is communicated with the water inlet end of the water flow channel of the next second roller structure through a water pipe; the water flow channel at one end, sleeved with the second bearing, of the first roller structure is communicated with the water inlet end of the water flow channel at the first end of the second roller structure through a water pipe, and the water outlet end of the water flow channel at the tail end of the second roller structure is communicated with the water flow channel at one end, sleeved with the second bearing, of the first roller structure through a water pipe.

In one possible implementation, the water tube is coaxial with the mandrel.

In a possible implementation manner, both ends of the mandrel are provided with mounting holes, and the mounting holes are used for mounting one end of the water service pipe; and a first sealing assembly is arranged at the contact position of the inner wall of the mounting hole and the outer wall of the water service pipe.

In one possible implementation, the water flow path comprises a water through hole, a channel group and a roller surface cooling channel; the roller surface cooling channel is arranged on the outer side wall of the mandrel, and when cooling water flows through the roller surface cooling channel, the heat of the roller surface can be taken away; one of the water through holes is communicated with one end of the roll surface cooling channel through one group of the channel groups, and the other end of the roll surface cooling channel is communicated with the other water through hole through the other group of the channel groups; the rotary joint and the water service pipe are communicated with the water service hole.

In one possible implementation, the roll face cooling passage includes a first annular groove, a second annular groove, and a plurality of water channels; the first annular groove and the second annular groove are arranged on the outer side wall of the mandrel along the circumferential direction, one water through hole is communicated with the first annular groove through one group of channel groups, and the second annular groove is communicated with the other water through hole through the other group of channel groups; a plurality of the one end of water course all with first annular groove intercommunication, the other end all with the annular groove intercommunication of second for with the water of first annular groove is carried to the annular groove of second.

In one possible implementation, the extending direction of the water channels is parallel to the axis of the mandrel.

In a possible implementation, the water channel is rectangular in a radial cross section of the mandrel.

In one possible implementation, the group of channels includes four channels; one end of each of the four channels of the channel group is communicated with one circle of the water through hole at equal intervals, and the other end of each channel is communicated with the first annular groove; one end of the four channels of the other channel group is communicated with the periphery of the other water through hole at equal intervals, and the other end of the four channels of the other channel group is communicated with the second annular groove.

In one possible implementation, the outer side wall of the mandrel is in interference fit with the inner wall of the roll shell.

In one possible implementation, the sleeve is made of thick-walled tube.

The embodiment of the utility model provides an in one or more technical scheme, following technological effect or advantage have at least:

an embodiment of the utility model provides a continuous casting free roll, this continuous casting free roll include first roller structure, second roller structure and water service pipe. The first roller structure comprises a water-cooled roller, a first bearing seat assembly, a rotary joint, a second bearing and a second bearing seat assembly; the second roller structure comprises a water-cooled roller, a second bearing and a second bearing seat assembly. The water-cooling roller comprises a roller sleeve and a mandrel, the roller sleeve is sleeved in the middle of the mandrel, a water flow passage is arranged in the mandrel, and the water flow passage can enable cooling water to flow to the other end from one end of the mandrel, so that heat of the roller surface is taken away. The end face of one end of the water-cooled roller is provided with a rotary joint which is communicated with the water flow passage, the outer side wall of the end is sleeved with a first bearing, the outer side walls of the first bearing and the rotary joint are sleeved with a first bearing seat assembly, and the other end of the water-cooled roller is sleeved with a second bearing and then sleeved with a second bearing seat assembly, so that a first roller structure is formed. And the two ends of the water-cooled roller are sleeved with the second bearings and then sleeved with the second bearing seat assembly, so that a second roller structure is formed. The water outlet end of the water flow channel of the previous second roller structure is communicated with the water inlet end of the water flow channel of the next second roller structure through a water pipe. The water flow channel at one end of the second bearing sleeved with one first roller structure is communicated with the water inlet end of the water flow channel of the second roller structure at the head end through a water pipe, and the water outlet end of the water flow channel of the second roller structure at the tail end is communicated with the water flow channel at one end of the second bearing sleeved with the other first roller structure through a water pipe. In practical application, external cooling water is input to the water flow channel of the cooling roller through the rotary joint at the external cooling water input side, flows through the cooling water taking away heat of each roller surface after flowing through each water cooling roller, is finally output to the rotary joint at the side from the water flow channel of the water cooling roller at the external output side, and is discharged to the outside. Compare in the relevance of current each part interconnect of continuous casting free roller too strong, all need install and dismantle whole continuous casting free roller during manufacturing and maintenance, the utility model discloses a continuous casting free roller sets up first roller structure and second roller structure, thereby each part modularization of continuous casting free roller, first roller structure and second roller structure, through the water service pipe intercommunication between two second roller structures, just constitute the continuous casting free roller after fixing bearing assembly according to operating condition, when manufacturing whole continuous casting free roller like this, can install after the sub-module is made earlier, when needs maintenance, the module that will maintain is dismantled the maintenance can, thereby need not install and dismantle whole continuous casting free roller during manufacturing and maintenance, make things convenient for manufacturing and maintenance greatly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a continuous casting free roll provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a water-cooled roll provided in an embodiment of the present application;

FIG. 3 is a sectional view taken along line A-A of FIG. 1;

fig. 4 is a sectional view taken along line B-B in fig. 1.

Icon: 1-a first roller configuration; 2-a second roller structure; 3, a water pipe; 4-water cooling roller; 41-roller sleeve; 42-a mandrel; 421-water through holes; 422-channel group; 4221-channel; 423-roll surface cooling channel; 4231-a first annular groove; 4232-second annular groove; 4233-water channel; 5-a first bearing; 6-a first bearing housing assembly; 7-a swivel joint; 8-a second bearing; 9-a second chock assembly; 10-first seal assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, an embodiment of the present invention provides a continuous casting free roll, which includes a first roll structure 1, a second roll structure 2, and a water pipe 3. The first roller construction 1 comprises a water-cooled roller 4, a first bearing 5, a first chock assembly 6, a swivel joint 7, a second bearing 8 and a second chock assembly 9. The second roller structure 2 comprises a water-cooled roller 4, a second bearing 8 and a second chock assembly 9. The water-cooling roller 4 comprises a roller sleeve 41 and a mandrel 42, the roller sleeve 41 is sleeved on the middle of the mandrel 42, a water flow passage is arranged in the mandrel 42, and the water flow passage can enable cooling water to flow from one end of the mandrel 42 to the other end, so that heat on the surface of the roller is taken away. The end face of one end of the water-cooled roller 4 is provided with the rotary joint 7, the rotary joint 7 is communicated with the water flow passage, the outer side wall of the end is sleeved with the first bearing 5, the outer side walls of the first bearing 5 and the rotary joint 7 are sleeved with the first bearing seat assembly 6, the other end of the water-cooled roller 4 is sleeved with the second bearing 8 and then sleeved with the second bearing seat assembly 9, and therefore the first roller structure 1 is formed. Two ends of the water-cooled roller 4 are sleeved with the second bearing 8 and then sleeved with the second bearing seat assembly 9, so that the second roller structure 2 is formed. The water outlet end of the water flow channel of the previous second roller structure 2 is communicated with the water inlet end of the water flow channel of the next second roller structure 2 through a water pipe 3. The water flow channel at one end of the second bearing 8 sleeved on one first roller structure 1 is communicated with the water inlet end of the water flow channel of the second roller structure 2 at the head end through the water pipe 3, and the water outlet end of the water flow channel of the second roller structure 2 at the tail end is communicated with the water flow channel at one end of the second bearing 8 sleeved on the other first roller structure 1 through the water pipe 3. As fig. 1 shows a schematic structural view of two first roll structures 1 and one second roll structure 2, in practical use, a plurality of second roll structures 2 can be provided according to the required length of the continuous casting free roll.

In practical application, external cooling water is input into the water flow channel of the water cooling roller 4 through the rotary joint 7 at the external cooling water input side, passes through the water cooling rollers 4 to take away the cooling water of heat of each roller surface, and is finally output to the rotary joint 7 at the side from the water flow channel of the water cooling roller 4 at the external output side, and is discharged to the outside. Compare in the relevance of current each part interconnect of continuous casting free roll too strong, all need install and dismantle whole continuous casting free roll during manufacturing and maintenance, the utility model discloses a continuous casting free roll sets up first roller structure 1 and second roller structure 2, thereby each part modularization of continuous casting free roll, to first roller structure 1 and second roller structure 2, communicate through water service pipe 3 between two second roller structure 2, just constituted the continuous casting free roll after fixing bearing assembly according to operating condition, specifically, as shown in fig. 1, it is fixed with the terminal surface at the both ends of water-cooled roll 4 respectively earlier, be fixed in on the fan-shaped section frame again, thereby accomplish the assembly of whole continuous casting free roll. Thus, when the whole continuous casting free roller is manufactured, the module can be manufactured and then installed, when the module is required to be maintained, the module required to be maintained is disassembled and maintained, the whole continuous casting free roller is not required to be assembled and disassembled during manufacturing and maintenance, and manufacturing and maintenance are greatly facilitated.

In practical application, the rotary joint 7 is further sleeved with a second sealing assembly, so that the sealing performance of the continuous casting free roller is enhanced, the second sealing assembly is close to the central axis of the central shaft 42 of the water cooling roller 4, the heat influence of heated steel billets is small, the aging of the second sealing assembly is slowed down, the service life of the second sealing assembly is prolonged, and the service life of the continuous casting free roller is prolonged.

Further, as shown in fig. 1, the water pipe 3 is coaxial with the mandrel 42, and the water pipe 3 is arranged close to the central axis of the mandrel 42 of the water cooling roller 4 and is located on the end surface of the water cooling roller 4, and is far away from the roller surface, so that the heat influence of the heated billet is small, the aging of the water pipe 3 is slowed down, the service life of the water pipe 3 is prolonged, and the service life of the continuous casting free roller is prolonged.

As shown in fig. 1, the spindle 42 is provided with mounting holes at both ends thereof, and the mounting holes are used for mounting one end of the water service pipe 3. The contact part of the inner wall of the mounting hole and the outer wall of the water service pipe 3 is provided with a first sealing component 10. Thereby enhancing the sealing performance of the continuous casting free roll. The first sealing assembly 10 may be a sealing ring, the number of the sealing rings depends on the sealing effect and the required cost that are actually required to be achieved, and fig. 1 shows a schematic diagram that two sealing rings are arranged at the contact position of the inner wall of the mounting hole and the outer wall of the water service pipe 3. Because the position that first seal assembly 10 set up is close to the axis of the dabber 42 of water-cooling roller 4 to the heat influence of heated steel billet is less, has slowed down first seal assembly 10 ageing, thereby has prolonged the life of first seal assembly 10, and then has prolonged the life of continuous casting free roll.

As shown in fig. 2, the water flow path includes water passage holes 421, channel groups 422, and roll surface cooling channels 423. Both ends of the mandrel 42 are respectively provided with a water through hole 421 along the axial direction, specifically, one end of the mandrel 42 is provided with one water through hole 421 along the axial direction, the water through hole 421 extends from the mounting hole at one end of the mandrel 42 to the inside of the mandrel 42 and is used for communicating with the outside of the water-cooling roller 4 so as to input cooling water to the mandrel 42 from the outside of the water-cooling roller 4, the other end of the mandrel 42 is provided with another water through hole 421 along the axial direction, and the other water through hole 421 is a mounting hole extending from the inside of the mandrel 42 to the other end of the mandrel 42 and is used for communicating with the outside of the water-cooling roller 4 so as to discharge the cooling water taking away heat of the roller surface to the outside of the water-cooling roller 4.

The channel group 422 is arranged along the radial direction of the mandrel 42, and the roller surface cooling channel 423 is arranged on the outer side wall of the mandrel 42, so that when cooling water flows through the roller surface cooling channel 423, heat of the roller surface can be taken away. Wherein the roll surface refers to the surface of the roll shell 41 which is in contact with the hot steel blank. One water passage hole 421 communicates with one end of the roll surface cooling passage 423 through one group of passage groups 422, and the other end of the roll surface cooling passage 423 communicates with the other water passage hole 421 through the other group of passage groups 422. The rotary joint 7 and the water pipe 3 are both communicated with the water through hole 421.

The embodiment of the utility model provides a water flow path of water-cooling roller 4 lets in cooling water through a limbers 421 to dabber 42. The cooling water flows into one channel set 422 through one water through hole 421 and then flows to one end of the roller surface cooling channel 423, because the roller surface cooling channel 423 is arranged on the outer side wall of the mandrel 42 and is attached to the inner side wall of the roller sleeve 41, in the process that the cooling water flows through the roller surface cooling channel 423, the cooling water can take away heat of the roller surface, the heat comprises heat conduction heat and radiation heat generated by hot steel billets passing through the roller surface, then the cooling water taking away the heat of the roller surface flows out from the other end of the roller surface cooling channel 423 and flows into the other water through hole 421 through the other channel set 422, and then the cooling water taking away the heat of the roller surface is output to the outside of the water-cooled roller 4 through the other water through hole 421. The utility model discloses a roll surface cooling channel 423 sets up in dabber 42's lateral wall, is close to the roll surface, and the cooling effect is obvious, makes water-cooling roller 4 in time dispel the heat to protected the roll surface difficult quilt harm, greatly prolonged the life of continuous casting free roll.

As shown in fig. 1 and 4, the roll surface cooling passage 423 includes a first ring groove 4231, a second ring groove 4232, and a plurality of water passages 4233. The first ring groove 4231 and the second ring groove 4232 are both circumferentially provided on the outer side wall of the mandrel 42, one water passage hole 421 communicates with the first ring groove 4231 through one set of passage groups 422, and the second ring groove 4232 communicates with the other water passage hole 421 through the other set of passage groups 422. The plurality of water passages 4233 each have one end communicating with the first ring groove 4231 and the other end communicating with the second ring groove 4232, and serve to transfer water of the first ring groove 4231 to the second ring groove 4232.

In practice, since one water passage hole 421 is communicated with the first ring groove 4231 through the group of passage groups 422, cooling water is introduced into one water passage hole 421 of the mandrel 42, the cooling water flows into the group of passage groups 422 through the one water passage hole 421 and then flows into the first ring groove 4231, since one ends of the plurality of water passages 4233 are communicated with the first ring groove 4231, the cooling water flows into the plurality of water passages 4233, since the plurality of water passages 4233 are arranged on the outer side wall of the mandrel 42 and are attached to the inner side wall of the roller shell 41, the cooling water can take away heat from the roller surface during the process of the cooling water flowing through the water passages 4233. The other ends of the plurality of water passages 4233 are communicated with the second ring-shaped groove 4232, the cooling water taking away the heat of the roll surface flows into the second ring-shaped groove 4232, and since the second ring-shaped groove 4232 is communicated with the other water through hole 421 through the other group of passage group 422, the cooling water taking away the heat of the roll surface flows into the other group of passage group 422 and then flows into the other water through hole 421, and then the cooling water taking away the heat of the roll surface is discharged through the other water through hole 421. Due to the arrangement of the first annular groove 4231 and the second annular groove 4232, the two groups of channel groups 422 are convenient to communicate with the plurality of water channels 4233, the ports of the channel groups 422 and the ports of the water channels 4233 do not need to correspond one to one, the fact that cooling water flows into one end of each water channel 4233 can be guaranteed, the cooling water taking away heat of the roll surface can flow out of the other end of each water channel 4233, and therefore the machining difficulty of the mandrel 42 is reduced. In addition, it is relatively easy to machine the first annular groove 4231 and the second annular groove 4232 on one circumference of the mandrel 42. In addition, since the first and second

annular grooves

4231 and 4232 are located on the outer side wall of the mandrel 42, when water flows through the first and second

annular grooves

4231 and 4232, there is a certain cooling effect on the roll surface, thereby further increasing the cooling effect of the water-cooled roll 4.

As shown in fig. 2, the plurality of water passages 4233 each extend in a direction parallel to the axis of the spindle 42. That is, the plurality of water passages 4233 are all linear type and the plurality of water passages 4233 are parallel to each other, so that the water passages 4233 can be conveniently processed, and the cooling water can rapidly flow from the first annular groove 4231 to the second annular groove 4232, so that the flowing speed of the cooling water is increased, and the cooling effect of the roller surface is improved. Of course, the plurality of water channels 4233 may also be helical, each water channel 4233 is spirally wound on the outer side wall of the mandrel 42 and the interval between the adjacent water channels 4233 is equal; the plurality of water channels 4233 may also be composed of linear water channels 4233 and spiral water channels 4233 alternately, the linear water channels 4233 are parallel to each other, and the interval distance between the adjacent spiral water channels 4233 is equal.

As shown in fig. 3, in the radial cross section of the mandrel 42, the cross sections of the plurality of water channels 4233 are equally spaced around the outer wall of the mandrel 42, that is, the plurality of water channels 4233 are uniformly distributed on the outer side wall of the mandrel 42, so that when cooling water is introduced into the plurality of water channels 4233, the cooling water flows through the plurality of water channels 4233, the cooling of the roll surface is more uniform, and the cooling effect is better.

The number of the water channels 4233 may be three, five, ten, or the like, and based on consideration of factors such as cooling effect, the circumferential length of the radial section of the mandrel 42, the processing cost, and the like, as shown in fig. 3, the number of the water channels 4233 is twelve, so that the cooling water flowing through the mandrel 42 has a good cooling effect, and the plurality of the water channels 4233 can be uniformly distributed on the mandrel 42 and within a reasonable processing cost.

Alternatively, as shown in fig. 3, in a radial cross section of the mandrel 42, the water passage 4233 is rectangular. Of course, the water passage 4233 may have a triangular or trapezoidal shape. Compared with other shapes, the rectangular water channels 4233 are convenient to process, and the rectangular area is larger along the same radial depth, so that the water flow flowing through each water channel 4233 is larger, namely the water flow of the whole water channels 4233 is increased, and the cooling effect of the mandrel 42 is more remarkable.

As shown in fig. 4, channel set 422 includes four channels 4221. One end of the four passages 4221 of one passage group 422 is communicated with one circumference of one water passage hole 421 at equal intervals, and the other end is communicated with the first ring-shaped groove 4231. One ends of the four passages 4221 of the other group 422 are communicated with a circle of the other water passage hole 421 at equal intervals, and the other ends are communicated with the second annular groove 4232.

Of course, channel set 422 may also include two, three, five, etc. channels 4221. If the number of the water passages 4233 is large, the number of the passages 4221 is too small, and the flow rate of water flowing from the passages 4221 into the water passages 4233 is too low, each water passage 4233 cannot be filled with water, and the desired cooling effect cannot be achieved. Too many passages 4221 increase the difficulty of machining. In the actual process, one end of each of the plurality of passages 4221 is communicated with one water through hole 421 at intervals, and the adjacent passages 4221 have equal intervals, so that the best water through effect is achieved, that is, the circumference of one water through hole 421 needs to be divided equally during the process, and if three or five passages 4221 are processed, the difficulty of dividing equally is greatly increased. The four passages 4221 are arranged, the included angle between every two adjacent passages 4221 is 90 degrees, the water passing amount of the water passage 4233 can be guaranteed, meanwhile, the difficulty of equally dividing the circumference of one water passing hole 421 is reduced, and further the processing difficulty of the passages 4221 is reduced.

Specifically, when the passage group 422 includes four passages 4221, the roll surface cooling passage 423 includes a first ring groove 4231, a second ring groove 4232 and a plurality of water passages 4233, the first ring groove 4231 and the second ring groove 4232 are respectively circumferentially disposed on the outer sidewall of the mandrel 42, one end of each of the four passages 4221 of the passage group 422 is equally spaced and communicated with one circumference of one water passage hole 421, the other end is communicated with the first ring groove 4231, one end of each of the plurality of water passages 4233 is communicated with the first ring groove 4231, the other end is communicated with the second ring groove 4232, and the water of the first ring groove 4231 is delivered to the second ring groove 4232, one end of each of the four passages 4221 of the other passage group 422 is communicated with the second ring groove 4232, and the other end is equally spaced and communicated with the other circumference of the other water passage hole 421. In the water cooling roller 4 provided by the embodiment of the application, one cooling water input from one water through hole 421 is divided into four parts by four passages 4221 of one group of passage groups 422, the four cooling water flows flow into the plurality of water passages 4233 after being converged by the first annular groove 4231 to be divided into a plurality of water flows, the plurality of cooling water flows absorb heat of the roller surface in the flowing process, then are converged by the second annular groove 4232 to be divided into four parts, and are conveyed to another water through hole 421 by the four passages 4221 of another group of passage groups 422 to be converged into one part to be discharged. During the actual use of the roll, generally the central part of the roll is in contact with the hot steel blank, and the roll rotates during use, so that most of the heat of the hot steel blank is transferred to the central part of the roll first. The water-cooling roller 4 of this embodiment, the stranded water course 4233 with the roller middle part is close to roller shell 41 and sets up, can in time conduct heat, has avoided heat transfer to dabber 42 to a certain extent, can avoid dabber 42 to damage, also reduces the material requirement of dabber 42 to a certain extent. The water channel 4233 is directly arranged on the outer side wall of the mandrel 42, so that the production difficulty of the roller sleeve 41 can be reduced, and the water channel 4233 can be closer to the roller surface, so that the cooling water flowing through the water channel 4233 can take away the heat transferred to the roller sleeve 41 by the hot-pressed blank in time.

The water cooling process of the water cooling roller 4 of this embodiment is: the cooling water is introduced into one water through hole 421 of the mandrel 42, flows into the first ring-shaped water tank after flowing into the four channels 4221 of the channel group 422 through the water through hole 421, flows into the plurality of water channels 4233 because one ends of the plurality of water channels 4233 are communicated with the first ring-shaped groove 4231, and can take away heat of the roller surface in the process that the cooling water flows through the water channels 4233 because the plurality of water channels 4233 are arranged on the outer side wall of the mandrel 42 and are attached to the inner side wall of the roller sleeve 41. The other ends of the plurality of water passages 4233 are communicated with the second annular groove 4232, the cooling water taking away the heat of the roll surface flows into the second annular groove 4232, the second annular groove 4232 is communicated with the other water through hole 421 through the four passages 4221 of the other group of passage 422, so that the cooling water taking away the heat of the roll surface flows into the four passages 4221 of the other group of passage 422 and then flows into the other water through hole 421, and then the cooling water taking away the heat of the roll surface is discharged through the other water through hole 421.

Further, along the radial direction of the mandrel 42, the depths of the first ring-shaped groove 4231 and the second ring-shaped groove 4232 of the water cooling roller 4 of the present invention are slightly larger than the depth of the water passage 4233. During the rotation of the roller sleeve 41 and the mandrel 42, four water flows in the four passages 4221 of one group of passage groups 422 are accelerated and converged to the first ring-shaped groove 4231 by virtue of the centrifugal force of the four water flows, because the depth of the first ring-shaped groove 4231 is slightly larger than that of the water passage 4233, the water pressure in the first ring-shaped groove 4231 is slightly larger than that in the plurality of water passages 4233, the flow rate of cooling water in the plurality of water passages 4233 close to the end of the first ring-shaped groove 4231 is reduced by virtue of the pressure difference generated by the four water flows, and the temperature of the cooling water is lower at the moment, so that the flow rate is lower and more heat can be taken away. When the cooling water in the plurality of water channels 4233 converges towards the second annular groove 4232, the temperature of the cooling water gradually rises due to the heat of the roller surface taken away by the cooling water, at this time, because the depth of the second annular groove 4232 is slightly greater than the depth of the water channel 4233, the water pressure in the second annular groove 4232 is slightly greater than the water pressure in the plurality of water channels 4233, so that compared with the end, close to the first annular groove 4231, of the plurality of water channels 4233, the water flow speed of the middle part of the plurality of water channels 4233 and the end, close to the second annular groove 4232, is increased, more heat can be taken away by increasing the water flow speed, and the shortage that the heat taken away by the roller surface is reduced due to the increase of the water temperature of the cooling water at this time is overcome. Further, the uniformity of heat absorption on the surface of the roller can be ensured on the whole water flow channel of the plurality of water channels 4233.

Alternatively, the roll face cooling channels 423 may also include only a plurality of water passages 4233. The passage group 422 includes a plurality of passages 4221, and the number of the passages 4221 is the same as the number of the water passages 4233. One end of each of the plurality of passages 4221 of the passage group 422 is circumferentially and equidistantly disposed on the peripheral wall of one of the water passage holes 421, and the other end thereof is respectively communicated with one end of one of the water passages 4233. One end of each of the plurality of passages 4221 of the other passage group 422 is circumferentially and equidistantly arranged on the peripheral wall of the other water passage 421, and the other ends of the plurality of water passages 4233 are respectively communicated with the other end of one passage 4221 one by one. The cooling water is introduced into one water through hole 421 of the mandrel 42, the cooling water flows into each passage 4221 of one group of passage groups 422 through one water through hole 421, since each passage 4221 is communicated with one water passage 4233, the cooling water directly flows into each water passage 4233, since the plurality of water passages 4233 are arranged on the outer side wall of the mandrel 42 and are attached to the inner side wall of the roller shell 41, the cooling water can take away the heat of the roller surface in the process that the cooling water flows through the water passages 4233, then the cooling water taking away the heat of the roller surface flows into each passage 4221 of the other group of passage groups 422, since one end of the plurality of passages 4221 is circumferentially arranged on the peripheral wall of the other water through hole 421 at equal intervals, the cooling water taking away the heat of the roller surface flows into the plurality of passages 4221 and then flows into the other water through hole 421, and then the cooling water taking away the heat of the roller surface is discharged through the other water through hole 421.

In practice, the outer side wall of the mandrel 42 is interference fit with the inner wall of the sleeve 41. I.e. the diameter of the radially outer side wall of the spindle 42 is slightly larger than the inner side wall of the roller shell 41. The interference fit is that in the mechanical installation process, many parts need to be tightly fitted, the holes are expanded by using the elasticity of the material of the roller sleeve 41 and are deformed to be sleeved on the mandrel 42, and when the holes are restored, the clamping force on the mandrel 42 is generated, so that the roller sleeve 41 is tightly fitted with the mandrel 42. In the interference fit tolerance band diagram, the tolerance band of the bore of the sleeve 41 is below the tolerance band of the mandrel 42, and the algebraic difference of the dimension of the bore minus the dimension of the mandrel 42 is negative. The interference fit connection structure is simple, the centering performance is good, the strength weakening of the mandrel 42 and the roller sleeve 41 is small, and the impact resistance is good. Because the outer side wall of the mandrel 42 is in interference fit with the inner wall of the roller sleeve 41, the sealing performance of the roller sleeve to the roller surface cooling channel 423 is greatly improved, and water leakage in the working process is prevented.

Alternatively, the roller shell 41 is made of a thick-walled tube. Thick-walled pipes are also called thick-walled steel pipes, and steel pipes having a ratio of the outer diameter to the wall thickness of less than 20 are called thick-walled steel pipes. Specifically, the round pipe blank is cut by a cutting machine to form a blank with the length of about 1 meter, the blank is conveyed into a smelting furnace through a conveyor belt to be heated, the steel blank is conveyed into the smelting furnace to be heated, the temperature is about 1200 ℃, and fuel is hydrogen or acetylene. And (4) perforating the round pipe blank after the round pipe blank is discharged from the furnace by a pressure perforating machine. The common puncher is a conical roller puncher, which has high production efficiency, good product quality and large punching and expanding amount and can be used for punching various steel types. After perforation, the round tube blank is sequentially subjected to three-roller skew rolling, continuous rolling or extrusion. After extrusion, the tube is removed and sized, and the sizing mill rotates into the billet at high speed through the conical drill to punch holes to form a thick-wall tube blank. The inner diameter of the thick-walled tube blank is determined by the length of the outer diameter of the sizing mill drill bit. Sizing the thick-wall pipe initial blank, and then feeding the thick-wall pipe initial blank into a cooling tower. The thick-wall pipe initial blank is straightened after being cooled by water spray cooling. The thick-wall pipe initial blank is straightened to obtain a thick-wall pipe finished product, and then the thick-wall pipe finished product is conveyed to a metal flaw detector (or a hydraulic test) by a conveying belt for internal flaw detection. If the inner part of the thick-wall pipe finished product has the problems of cracks, bubbles and the like, the thick-wall pipe finished product can be detected. After the quality of the thick-wall pipe finished product is inspected, the thick-wall pipe with the best quality is obtained by strict manual selection. The thick-walled pipe has good strength and good wear resistance, so that the roller sleeve 41 has good strength and wear resistance. In practical applications, the roller shell 41 may be formed by machining a thick-walled alloy pipe.

Because the roller sleeve 41 is made of thick-wall pipes, the wall thickness of the roller sleeve is smaller than that of the roller sleeve 41 of the existing roller, so that the distance between the roller surface cooling channel 423 of the water-cooling roller 4 and the roller surface is closer, and the cooling effect of the water-cooling roller 4 is better. In practical applications, in order to ensure the height of the continuous casting free roll when applied to the equipment, as shown in fig. 1 and 2, the diameter of the part of the mandrel 42 sleeved with the roller sleeve 41 is made larger, while the inner diameters of the bearings, the bearing assemblies and the like are not changed, so that the diameters of the two ends of the mandrel 42 sleeved with the bearings and the bearing assemblies are made smaller.

Further, hard alloy or stainless steel is welded on the outer surface of the roller shell 41, thereby further improving the wear resistance of the outer surface of the roller shell 41.

Among them, overlay welding is an economical and fast process for modifying the surface of a material, and is increasingly widely applied to the manufacturing and repairing of parts in various industrial sectors. The overlay welding is a welding method in which hard alloy or stainless steel is melted by an electric welding method or a gas welding method and is piled on the outer surface of the roller shell 41. The surfacing welding has obvious economic benefits for prolonging the service life of parts, reasonably using materials, improving the product performance, reducing spare parts and reducing the cost. Compared with other surface treatment methods, the surfacing method has the advantages that the surfacing layer is bonded with the base metal in a metallurgical mode, the bonding strength is high, and the impact resistance is good. The composition and performance of the metal of the surfacing layer are convenient to adjust, the adjustment formula of a surfacing electrode or a flux-cored electrode in common welding rod electric arc welding is convenient, and various alloy systems can be designed to adapt to different working condition requirements. The thickness of the overlaying layer is large, and the thickness of the overlaying layer can be adjusted within the range of 2 mm-30 mm. In the present invention, the wear-resistant cemented carbide or stainless steel is welded to the outer surface of the roller shell 41 by the overlay welding technique, so that the surface of the roller shell 41 is provided with an alloy layer having specific properties, and therefore, for an operator who can master the welding technique, the difficulty is low, and the operability is high.

Cemented carbide is an alloy material made from a hard compound of refractory metals and a binder metal by a powder metallurgy process. The hard alloy has a series of excellent performances of high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like, particularly high hardness and wear resistance, basically keeps unchanged even at the temperature of 500 ℃, and still has high hardness at the temperature of 1000 ℃. The stainless steel has better wear resistance, corrosion resistance and heat resistance.

In practical application, the mandrel 42 of the water-cooling roller 4 is processed at one time.

The embodiment of the utility model provides an use foretell water-cooling method of water-cooling roller 4, including following step: introducing cooling water into a water through hole 421 of the mandrel 42; the cooling water flows into one end of the roll surface cooling passage 423 through one water passage group, flows through the roll surface cooling passage 423, flows out of the other end of the roll surface cooling passage 423, and flows into the other water passage hole 421 through the other water passage group 422; the cooling water carrying away the heat of the roll surface is discharged through another water passage hole 421.

The embodiment of the present invention provides a water cooling method using the above water cooling roller 4, which is to introduce cooling water into one water through hole 421 of the mandrel 42. The cooling water flows into one channel set 422 through one water through hole 421 and then flows to one end of the roller surface cooling channel 423, because the roller surface cooling channel 423 is arranged on the outer side wall of the mandrel 42 and is attached to the inner side wall of the roller sleeve 41, in the process that the cooling water flows through the roller surface cooling channel 423, the cooling water can take away heat of the roller surface, then the cooling water taking away heat of the roller surface flows out from the other end of the roller surface cooling channel 423 and flows into the other water through hole 421 through the other channel set 422, and then the cooling water taking away heat of the roller surface is discharged through the other water through hole 421. The utility model discloses a roll surface cooling channel 423 sets up in dabber 42's lateral wall, is close to the roll surface, and the cooling effect is obvious, makes the roller in time dispel the heat to protected the roll surface difficult by the harm, greatly prolonged the life of roller.

Specifically, when the roll surface cooling passage 423 includes a first ring-shaped groove 4231, a second ring-shaped groove 4232 and a plurality of water passages 4233, the first ring-shaped groove 4231 and the second ring-shaped groove 4232 are respectively circumferentially disposed on the outer side wall of the mandrel 42, one water passage hole 421 communicates with the first ring-shaped groove 4231 through one group of passage sets 422, the second ring-shaped groove 4232 communicates with another water passage hole 421 through another group of passage sets 422, one end of each of the plurality of water passages 4233 communicates with the first ring-shaped groove 4231, the other end communicates with the second ring-shaped groove 4232, and when water in the first ring-shaped groove 4231 is supplied to the second ring-shaped groove 4232, since one water passage hole 421 communicates with the first ring-shaped groove 4231 through one group of passage sets 422, cooling water is supplied to one water passage hole 421 of the mandrel 42, and flows into the first ring-shaped water tank after flowing into one group of passage sets 422 through one water passage hole 4233, since one end of each of the plurality of water passages 4233 communicates with the first ring-shaped groove 4231, therefore, the cooling water flows into the plurality of water channels 4233, and since the plurality of water channels 4233 are arranged on the outer side wall of the mandrel 42 and are attached to the inner side wall of the roller sleeve 41, the cooling water can take away heat of the roller surface in the process of flowing through the water channels 4233. The other ends of the plurality of water passages 4233 are communicated with the second annular groove 4232, the cooling water taking away the heat of the roll surface flows into the second annular groove 4232, the second annular groove 4232 is communicated with the other water through hole 421 through the other group of passage 422, so that the cooling water taking away the heat of the roll surface flows into the other group of passage 422 and then flows into the other water through hole 421, and the cooling water taking away the heat of the roll surface is discharged through the other water through hole 421.

Further, when the roll surface cooling passage 423 includes only a plurality of water passages 4233, the passage group 422 includes a plurality of passages 4221, and the number of the passages 4221 is the same as the number of the water passages 4233, one end of the plurality of passages 4221 of one passage group 422 is circumferentially equidistantly provided on the circumferential wall of one water passage 421, and the other end thereof is respectively communicated with one end of one water passage 4233 one by one, one end of the plurality of passages 4221 of the other passage group 422 is circumferentially equidistantly provided on the circumferential wall of the other water passage 421, and the other end of the plurality of water passages 4233 is respectively communicated with the other end of one passage 4221 one by one, the cooling water is introduced into one water passage 421 of the mandrel 42, and the cooling water flows into each passage 4221 of the one passage group 422 through one water passage 421, and directly flows into each water passage 4233 because each passage 4221 is uniformly communicated with one water passage 4233, because the plurality of water passages 4233 are provided on the outer side wall of the mandrel 42, the cooling water is attached to the inner side wall of the roll shell 41, the cooling water can take away heat of the roll surface in the process that the cooling water flows through the water passage 4233, then the cooling water taking away the heat of the roll surface flows into each passage 4221 of the other group of passages 422, one end of each of the plurality of passages 4221 is circumferentially arranged on the peripheral wall of the other water through hole 421 at equal intervals, so that the cooling water taking away the heat of the roll surface flows into the plurality of passages 4221 and then flows into the other water through hole 421, and then the cooling water taking away the heat of the roll surface is discharged through the other water through hole 421.

Further, when the passage group 422 includes four passages 4221, and the roll surface cooling passage 423 includes a first ring groove 4231, a second ring groove 4232, and a plurality of water passages 4233, the first ring groove 4231 and the second ring groove 4232 are respectively circumferentially disposed on the outer sidewall of the mandrel 42, one end of each of the four passages 4221 of one passage group 422 is equally spaced and communicated with one circumference of one water passage 421, the other end is communicated with the first ring groove 4231, one end of each of the plurality of water passages 4233 is communicated with the first ring groove 4231, the other end is communicated with the second ring groove 4232, and the water in the first ring groove 4231 is delivered to the second ring groove 4232, and one end of each of the four passages 4221 of the other passage group 422 is communicated with the second ring groove 4232, and the other end is equally spaced and communicated with one circumference of the other water passage 421.

The cooling water is introduced into one water through hole 421 of the mandrel 42, flows into the first ring-shaped water tank after flowing into the four channels 4221 of the channel group 422 through the water through hole 421, flows into the plurality of water channels 4233 because one ends of the plurality of water channels 4233 are communicated with the first ring-shaped groove 4231, and can take away heat of the roller surface in the process that the cooling water flows through the water channels 4233 because the plurality of water channels 4233 are arranged on the outer side wall of the mandrel 42 and are attached to the inner side wall of the roller sleeve 41. The other ends of the plurality of water passages 4233 are communicated with the second annular groove 4232, the cooling water taking away the heat of the roll surface flows into the second annular groove 4232, the second annular groove 4232 is communicated with the other water through hole 421 through the four passages 4221 of the other group of passage 422, so that the cooling water taking away the heat of the roll surface flows into the four passages 4221 of the other group of passage 422 and then flows into the other water through hole 421, and then the cooling water taking away the heat of the roll surface is discharged through the other water through hole 421.

The embodiment of the present invention provides a water cooling process using the above-mentioned continuous casting free roll, wherein cooling water is inputted through the rotary joint 7 at the external cooling water input side, the cooling water flows into a water through hole 421 of the water cooling roll 4 at the external cooling water input side, the cooling water flows into one set of channel group 422 through one water through hole 421 and then flows to one end of the roll surface cooling channel 423, since the roll surface cooling channel 423 is disposed on the outer side wall of the mandrel 42 and is attached to the inner side wall of the roll mantle 41, the cooling water can take away heat of the roll surface during the process that the cooling water flows through the roll surface cooling channel 423, the cooling water taking away heat of the roll surface flows out from the other end of the roll surface cooling channel 423 and then flows into another water through another set of channel group 422 and then flows out to the water through another water through hole 421, and then flows into a water through hole 421 of the next water cooling roll 4 through the water pipe 3, and the heat … … of the roll surface of the next water-cooling roll 4 is taken away until the cooling water taking away the heat of each roll surface is output to the rotary joint 7 of the outward output side of the cooling water from the other water through hole 421 of the outward output side of the cooling water, and then is discharged, namely the water-cooling process of the whole continuous casting free roll is completed.

The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure.

Claims

1. A continuous casting free roll is characterized by comprising a first roll structure, a second roll structure and a water pipe;

the first roller structure comprises a water-cooled roller, a first bearing seat assembly, a rotary joint, a second bearing and a second bearing seat assembly; the second roller structure comprises a water-cooled roller, a second bearing and a second bearing seat assembly;

the water cooling roller comprises a roller sleeve and a mandrel, the roller sleeve is sleeved in the middle of the mandrel, a water flow passage is arranged in the mandrel, and the water flow passage can enable cooling water to flow from one end of the mandrel to the other end of the mandrel so as to take away heat of a roller surface;

the end face of one end of the water-cooled roller is provided with the rotary joint, the rotary joint is communicated with the water flow passage, the outer side wall of the end is sleeved with the first bearing, the first bearing and the outer side wall of the rotary joint are sleeved with the first bearing seat assembly, and the other end of the water-cooled roller is sleeved with the second bearing and then sleeved with the second bearing seat assembly, so that the first roller structure is formed;

the two ends of the water-cooled roller are sleeved with the second bearing and then sleeved with the second bearing seat assembly, so that the second roller structure is formed;

the water outlet end of the water flow channel of the previous second roller structure is communicated with the water inlet end of the water flow channel of the next second roller structure through a water pipe; the water flow channel at one end, sleeved with the second bearing, of the first roller structure is communicated with the water inlet end of the water flow channel at the first end of the second roller structure through a water pipe, and the water outlet end of the water flow channel at the tail end of the second roller structure is communicated with the water flow channel at one end, sleeved with the second bearing, of the first roller structure through a water pipe.

2. The continuous casting free roll of claim 1, wherein the water service pipe is coaxial with the mandrel.

3. The continuous casting free roll according to claim 1 or 2, wherein both ends of the mandrel are provided with mounting holes for mounting one end of the water service pipe;

and a first sealing assembly is arranged at the contact position of the inner wall of the mounting hole and the outer wall of the water service pipe.

4. The continuous casting free roll of claim 1, wherein the water flow path includes water passage holes, channel groups and roll surface cooling channels;

the roller surface cooling channel is arranged on the outer side wall of the mandrel, and when cooling water flows through the roller surface cooling channel, the heat of the roller surface can be taken away;

one of the water through holes is communicated with one end of the roll surface cooling channel through one group of the channel groups, and the other end of the roll surface cooling channel is communicated with the other water through hole through the other group of the channel groups;

the rotary joint and the water service pipe are communicated with the water service hole.

5. The continuous casting free roll of claim 4, wherein the roll face cooling passages comprise a first annular groove, a second annular groove, and a plurality of water channels;

the first annular groove and the second annular groove are arranged on the outer side wall of the mandrel along the circumferential direction, one water through hole is communicated with the first annular groove through one group of channel groups, and the second annular groove is communicated with the other water through hole through the other group of channel groups;

a plurality of the one end of water course all with first annular groove intercommunication, the other end all with the annular groove intercommunication of second for with the water of first annular groove is carried to the annular groove of second.

6. The continuous casting free roll according to claim 5, wherein the plurality of water channels each extend in a direction parallel to the axis of the mandrel.

7. The continuous casting free roll according to any one of claims 5 or 6, characterized in that the water channel is rectangular in a radial cross section of the mandrel.

8. The continuous casting free roll of claim 5, wherein the set of channels includes four channels;

one end of each of the four channels of the channel group is communicated with one circle of the water through hole at equal intervals, and the other end of each channel is communicated with the first annular groove;

one end of the four channels of the other channel group is communicated with the periphery of the other water through hole at equal intervals, and the other end of the four channels of the other channel group is communicated with the second annular groove.

9. The continuous casting free roll of claim 1, wherein the outer side wall of the mandrel has an interference fit with the inner wall of the roll shell.

10. The continuous casting free roll of claim 1, characterized in that the roll shell is made of thick-walled tube.