Water-cooled furnace roller for thin slab continuous casting continuous rolling roller bottom type furnace

Abstract

The utility model provides a thin slab continuous casting continuous rolling roller bottom type furnace water cooling furnace roller which comprises a roller body, a water cooling layer and a limiting head, the inner side of the roller body is provided with a group of water cooling layers used for keeping continuous cooling of the roller body, and each water cooling layer comprises a layer body, an inner flow guide groove, an exchange port and a temperature guide wall. A plurality of groups of inner flow guide grooves used for cooling the roller body are formed in the layer body, each inner flow guide groove is of an annular structure, and a plurality of groups of cooling plates used for exchanging the temperature of cooling liquid are arranged in each inner flow guide groove. Compared with the prior art, the cooling device has the advantages that cooling liquid enters the multiple sets of inner flow guide grooves through the water inlet and outlet pipe, continuously flows along with rolling of the roller body in the cooling groove, and makes contact with the multiple sets of cooling plates in the cooling groove while continuously flowing, so that the contact area with the cooling liquid is increased, and the cooling effect is improved. And the cooling efficiency of the cooling liquid is improved, and meanwhile, continuous cooling of the roller body in the continuous casting and rolling process of the sheet billet is kept.

Description

TECHNICAL FIELD

[0001] The utility model belongs to water -cooled furnace roller technical field relates to a kind of water-cooled furnace roller for thin slab continuous casting and rolling roller bottom type furnace. BACKGROUND

[0002] In the process of thin slab continuous casting and rolling, water-cooled furnace roller plays a vital role, and its main function is to control the temperature of slab by cooling to ensure the smooth progress of rolling process. However, the existing water-cooled furnace roller has some shortcomings in use. Since the water-cooled furnace roller is directly in contact with high-temperature slab, it is prone to thermal fatigue, which causes cracks and peeling on the roller surface, thereby shortening the service life of the furnace roller. Inhomogeneous temperature distribution may occur during the cooling process of the water-cooled furnace roller, which can cause uneven surface temperature of the slab and affect the quality of the final product.

[0003] The main reasons for these shortcomings are the extreme requirements of high-temperature environment on material properties and the difficulty of achieving perfect temperature control in the design and operation of water cooling system. The conventional methods include using high-temperature-resistant and wear-resistant materials to manufacture the furnace roller and optimizing the layout of the water cooling system to achieve more uniform cooling effect. However, these methods also have disadvantages, such as high cost of high-temperature-resistant materials, and may still not meet the needs of long-term use under extreme conditions. Therefore, there is an urgent need for a water-cooled furnace roller for thin slab continuous casting and rolling roller bottom type furnace to solve the above problems. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model aims to provide a water-cooled furnace roller for thin slab continuous casting and rolling roller bottom type furnace to solve the problems raised in the background art.

[0005] The utility model realizes the following technical solutions: a water-cooled furnace roller for thin slab continuous casting and rolling roller bottom type furnace, comprising: a roller body, a water-cooled layer and a limiting head, the inner side of the roller body is provided with a group of water-cooled layers for maintaining the continuous cooling of the roller body;

[0006] The water-cooled layer comprises a layer body and a temperature guide wall, the inner part of the layer body is provided with a plurality of groups of inner flow guide grooves for cooling the roller body, the inner flow guide grooves are of an annular structure, the inner part of the inner flow guide grooves is provided with a plurality of groups of cooling plates for exchanging the temperature of the cooling liquid, the cooling plates are provided in a plurality of groups and are evenly staggered in two rows, the front and back sides of the cooling plates are respectively provided with a group of outer extension plates for expanding the temperature exchange area.

[0007] As a preferred implementation, each side of the cooling plate is provided with a set of guide walls for connecting and fixing the cooling plate and separating the cooling liquid channel, the guide walls are provided with two sets, and the inside of the two sets of guide walls is provided with a plurality of sets of exchange ports for exchanging the cooling liquid inside the inner guide groove. First, the staff introduces the cooling liquid required by the water-cooled furnace roller through the inlet and outlet pipe, and after injecting a sufficient amount of cooling liquid, the inlet and outlet pipe is closed, the cooling liquid enters the inside of the plurality of inner guide grooves through the inlet and outlet pipe, and keeps continuous flow through the inner cooling groove with the roller body rolling. While the cooling liquid continuously flows, it contacts with the plurality of cooling plates inside the cooling groove, thereby increasing the contact area with the cooling liquid, improving the cooling efficiency of the cooling liquid, and maintaining the continuous cooling of the roller body during the continuous casting and rolling process of the thin slab.

[0008] As a preferred implementation, the plurality of sets of exchange ports on the same side are uniformly distributed inside the guide wall, and are arranged at the middle position between the corresponding two sets of cooling plates. The outside of the guide wall is provided with a set of side flow grooves for external flow circulation of the cooling liquid.

[0009] As a preferred implementation, the side flow grooves are provided with two sets, and the two sets of side flow grooves are in communication with the inside of the plurality of sets of exchange ports on the corresponding side and the inside of the inner guide groove at the middle position. The outside of each set of side flow grooves is provided with a set of temperature guide walls for maintaining the temperature exchange effect.

[0010] As a preferred implementation, the temperature guide wall and the layer body are an integral structure, and the temperature guide wall and the layer body are a kind of metal material with high temperature guide effect. The inside of the water-cooled layer is provided with a set of roller cores for ensuring the rotation of the roller body.

[0011] As a preferred implementation, the roller core is provided with two sets of inlet and outlet pipes on the left and right sides for exchanging the cooling liquid inside the roller body. The inlet and outlet pipes penetrate the inside of the roller core and are in communication with the inside of the water-cooled layer. When the cooling liquid flows in the cooling groove, the cooling liquid inside the cooling plate can be guided outside through the exchange port position, thereby changing the flow range of the cooling liquid to expand the cooling area. At the same time, the cooling liquid in the side flow groove can continuously cool the inside of the temperature guide wall and the guide wall to ensure the uniform cooling effect of the roller body during the continuous casting and rolling process of the thin slab, thereby preventing uneven cooling of the thin slab and resulting in poor quality.

[0012] As a preferred implementation, the roller core is provided with a set of connecting seats on the left and right sides for connecting and fixing with the side clamping shaft. The connecting seat and the roller core are mutually welded and fixed, and each set of connecting seat is provided with a set of side clamping shafts outside for keeping the roller body embedded.

[0013] As a preferred embodiment, the side clamping shaft is internally provided with a set of limiting heads for limiting installation of a set of roller bodies, the roller bodies are installed inside an external roller bottom type furnace continuous rolling roller support frame, and a set of limiting bearings are provided outside the connection position of the side clamping shaft.

[0014] After the above technical scheme is adopted, the beneficial effects of the present application are as follows: when a sufficient amount of cooling liquid is injected to close the water inlet and outlet pipe, the cooling liquid enters the inside of the plurality of groups of inner flow guide grooves through the water inlet and outlet pipe, and continuously flows through the inside of the cooling groove along with the roller body, the cooling liquid continuously flows while contacting the plurality of groups of cooling plates in the cooling groove, thereby increasing the contact area with the cooling liquid, improving the cooling efficiency of the cooling liquid, and maintaining the continuous cooling of the roller body during the continuous casting and rolling process of the thin slab;

[0015] The cooling liquid inside the cooling plate can be guided outside through the exchange port position, thereby changing the flow range of the cooling liquid to expand the cooling area, and the cooling liquid inside the side flow groove can continuously cool the inside of the temperature guide wall and the flow guide wall to ensure uniform cooling effect of the roller body during the continuous casting and rolling process of the thin slab, thereby preventing uneven cooling of the thin slab and resulting in poor quality. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Fig. 1 Fig. 2 is a right front oblique side view of the water-cooled furnace roller of the thin slab continuous casting and rolling roller bottom type furnace according to the present application;

[0018] Fig. 2 Fig. 3 is a left oblique front side view of the water-cooled layer in the water-cooled furnace roller of the thin slab continuous casting and rolling roller bottom type furnace according to the present application;

[0019] Fig. 3 Fig. 4 is a top view of the inside of the water-cooled layer in the water-cooled furnace roller of the thin slab continuous casting and rolling roller bottom type furnace according to the present application;

[0020] In the figure: 100-roller body, 110-side clamping shaft, 120-water-cooled layer, 130-roller core, 140-water inlet and outlet pipe, 150-connection seat, 160-limiting head;

[0021] 12a-layer body, 12b-inner flow guide groove, 12c-cooling groove, 12d-cooling plate, 12e-flow guide wall, 12f-exchange port, 12g-side flow groove, 12h-temperature guide wall. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0023] Please refer to Figs. 1-3 A water-cooled furnace roller for thin slab continuous casting and rolling roll bottom type furnace, comprising: roller body 100, water-cooled layer 120 and limit head 160, the inner side of roller body 100 is provided with a group of water-cooled layer 120 for keeping roller body 100 continuous cooling;

[0024] Water-cooled layer 120 includes layer body 12a, inner flow guide groove 12b, cooling groove 12c and temperature guide wall 12h, the inside of layer body 12a is provided with a plurality of groups of inner flow guide grooves 12b for cooling roller body 100, the inner flow guide groove 12b is an annular structure, the inside of inner flow guide groove 12b is provided with a plurality of groups of cooling plates 12d for exchanging the temperature of cooling liquid, the cooling plate 12d is provided with a plurality of groups, and is evenly staggered in two rows, the front and back sides of cooling plate 12d are respectively provided with a group of outer extension plates for expanding the temperature exchange area.

[0025] The outer side of each side cooling plate 12d is provided with a group of flow guide walls 12e for connecting and fixing cooling plate 12d and separating cooling liquid flow guide channels, the flow guide wall 12e is provided with two groups, and the inside of the two groups of flow guide walls 12e is provided with a plurality of groups of exchange ports 12f for exchanging and guiding the cooling liquid in the inner flow guide groove 12b.

[0026] Please refer to Figs. 1-3 As the first embodiment of the utility model: first, the staff introduces the cooling liquid required by the water-cooled furnace roller through the inlet and outlet pipe 140, and when a sufficient amount of cooling liquid is injected, the inlet and outlet pipe 140 is closed, the cooling liquid enters the inside of a plurality of groups of inner flow guide grooves 12b through the inlet and outlet pipe 140, and keeps continuous flow by rolling with roller body 100 in the inside of cooling groove 12c, the cooling liquid keeps continuous flow at the same time as contacting with a plurality of groups of cooling plates 12d in the inside of cooling groove 12c, so as to increase the contact area with cooling liquid, and improve the cooling efficiency of cooling liquid while keeping the continuous cooling of roller body 100 in the process of thin slab continuous casting and rolling.

[0027] A plurality of groups of exchange ports 12f on the same side are evenly distributed in the inside of flow guide wall 12e, and are arranged at the middle position between the corresponding two groups of cooling plates 12d, the outer side of flow guide wall 12e is provided with a group of side flow grooves 12g for external flow circulation of cooling liquid.

[0028] The side flow grooves 12g are provided in two groups, and the two groups of side flow grooves 12g are in communication with the interiors of the corresponding side groups of exchange ports 12f and the interiors of the intermediate position flow guide grooves 12b, and each group of side flow grooves 12g is provided with a group of temperature guide walls 12h for maintaining the temperature exchange effect.

[0029] The temperature guide walls 12h and the layer body 12a are in an integrated structure, and the temperature guide walls 12h and the layer body 12a are both made of a kind of metal material with high temperature guide effect, and the water cooling layer 120 is provided with a group of roller cores 130 for ensuring the rotation of the roller body 100.

[0030] The roller core 130 is provided with two groups of inlet and outlet water pipes 140 for exchanging the cooling liquid in the roller body 100 on the left and right sides, respectively, and the inlet and outlet water pipes 140 penetrate through the interior of the roller core 130 and are in communication with the interior of the water cooling layer 120.

[0031] Please refer to Figs. 1-3 As a second embodiment of the utility model: when the cooling liquid flows in the cooling groove 12c, the cooling liquid on the inside of the cooling plate 12d can be guided out through the position of the exchange port 12f, so as to change the flow range of the cooling liquid and expand the cooling area, and the cooling liquid in the side flow groove 12g can continuously cool the inside of the temperature guide wall 12h and the flow guide wall 12e, so as to ensure the uniform cooling effect of the roller body 100 on the thin slab during the continuous casting and rolling process, thereby preventing uneven cooling of the thin slab and resulting in poor quality.

[0032] The roller core 130 is provided with a group of connecting seats 150 for connecting and fixing the side clamping shafts 110 on the left and right sides, respectively, and the connecting seats 150 and the roller core 130 are mutually welded and fixed, and each group of connecting seats 150 is provided with a group of side clamping shafts 110 for keeping the roller body 100 embedded on the outside.

[0033] The side clamping shaft 110 is provided with a group of limiting heads 160 for keeping the roller body 100 limited and installed, the roller body 100 is installed in the inside of the external roller bottom type furnace continuous rolling roller support frame, and a group of limiting bearings are arranged on the outside of the connecting position of the roller body 100 and the side clamping shaft 110.

[0034] The above only describes the preferred embodiments of the utility model and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A water-cooled roll for a thin slab continuous casting and rolling roll bottom type furnace, comprising: Roller body (100), water cooling layer (120) and limiting head (160), characterized in that: the inner side of the roller body (100) is provided with a group of water cooling layer (120) for keeping the roller body (100) continuously cooled; The water cooling layer (120) comprises a layer body (12a), an inner flow guide groove (12b), a cooling groove (12c) and a temperature guide wall (12h), the inner side of the layer body (12a) is provided with a plurality of groups of inner flow guide grooves (12b) for cooling the roller body (100), the inner flow guide groove (12b) is an annular structure, the inner flow guide groove (12b) is provided with a plurality of groups of cooling plates (12d) for exchanging the temperature of the cooling liquid, the cooling plate (12d) is provided with a plurality of groups and is evenly distributed in two rows, the front and back sides of the cooling plate (12d) are respectively provided with a group of outer extension plates for expanding the temperature exchange area.

2. A water-cooled roll for a roller hearth furnace for thin slab continuous casting and rolling according to claim 1, characterized in that: The outer side of each side cooling plate (12d) is provided with a group of flow guide walls (12e) for connecting and fixing the cooling plate (12d) and separating the cooling liquid flow channel, the flow guide wall (12e) is provided with two groups, and the inner sides of the two groups of flow guide walls (12e) are respectively provided with a plurality of groups of exchange ports (12f) for exchanging and guiding the cooling liquid in the inner flow guide groove (12b).

3. A water-cooled roll for a roller hearth furnace for thin slab continuous casting and rolling according to claim 2, characterized in that: The plurality of groups of exchange ports (12f) on the same side are evenly distributed in the inner side of the flow guide wall (12e), and are arranged at the middle position between the corresponding two groups of cooling plates (12d), the outer side of the flow guide wall (12e) is provided with a group of side flow grooves (12g) for circulating the cooling liquid.

4. A water-cooled furnace roller for a roller hearth furnace of a thin slab continuous casting and rolling according to claim 3, characterized in that: The side flow groove (12g) is provided with two groups, and the inner sides of the two groups of side flow grooves (12g) and the inner sides of the inner flow guide grooves (12b) at the middle position of the corresponding plurality of groups of exchange ports (12f) on one side are in communication with each other, and the outer side of each group of side flow grooves (12g) is provided with a group of temperature guide walls (12h) for keeping the temperature exchange effect.

5. A water-cooled furnace roller for a roller hearth furnace of a thin slab continuous casting and rolling according to claim 4, characterized in that: The temperature guide wall (12h) and the layer body (12a) are an integral structure, and the temperature guide wall (12h) and the layer body (12a) are both a kind of metal material with high temperature guide effect, the inner side of the water cooling layer (120) is provided with a group of roller cores (130) for guaranteeing the rotation of the roller body (100).

6. A water-cooled furnace roller for a roller hearth furnace of a thin slab continuous casting and rolling according to claim 5, characterized in that: The left and right sides of the roller core (130) are respectively provided with two groups of inlet and outlet water pipes (140) for exchanging the cooling liquid in the roller body (100), the inlet and outlet water pipes (140) penetrate the inner side of the roller core (130) and are in communication with the inner side of the water cooling layer (120) in the roller core (130).

7. A water-cooled furnace roller for a roller hearth furnace of a thin slab continuous casting and rolling according to claim 6, characterized in that: The left and right sides of the roller core (130) are respectively provided with a group of connecting seats (150) for connecting and fixing with the side clamping shaft (110), the connecting seat (150) and the roller core (130) are mutually welded and fixed, and the outer side of each group of connecting seats (150) is respectively provided with a group of side clamping shafts (110) for keeping the roller body (100) embedded.

8. A water-cooled furnace roller for a roller hearth furnace of a thin slab continuous casting and rolling according to claim 7, characterized in that: The inner side of the side clamping shaft (110) is provided with a group of limiting heads (160) for keeping the roller body (100) limiting installation, the roller body (100) is installed in the inner side of the external roller bottom type furnace continuous rolling roller support frame, and the outer side of the connecting position of the roller body (100) and the side clamping shaft (110) is provided with a group of limiting bearings.

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