Production system of marine profile steel
By designing a marine steel production system and using a combination of multiple rolling mills and different sawing equipment, the problems of low production efficiency and uneven quality of marine steel were solved, achieving efficient and low-energy production and meeting the high-quality requirements of marine T-beams.
Patent Information
- Application Number
- CN202423292228.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Domestic marine steel manufacturers lack universal rolling mills, making it impossible to efficiently produce marine T-shaped steel. This results in outdated production processes, low efficiency, numerous rolling passes, and high roll consumption. Furthermore, the asymmetry of the cross-section of marine steel leads to uneven cooling and severe bending, failing to meet high-quality requirements.
Design a marine steel section production system, including a billet rolling mill area, a finishing rolling mill area, a hot sawing area, a cooling bed area, a straightening area, and a cold sawing area. Employ conventional die forming method, double die forming method, and double universal die forming method, combined with multiple rolling mills and different sawing equipment, to achieve efficient production of marine steel sections.
It improved production efficiency and cooling and straightening quality, reduced roll consumption and production costs, expanded product range, and enhanced the company's market competitiveness.
Smart Images
Figure CN223847791U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a production system of marine section steel BACKGROUND
[0002] In January-September 2024, China's shipbuilding completed 3634 million deadweight tons; New orders 8711 million deadweight tons; As of the end of September, the order amount held was 19330 million deadweight tons. China's shipbuilding three indicators accounted for 55.1%, 74.7% and 61.4% of the global total in terms of deadweight tons. As of 2024, China's shipbuilding industry has maintained the world's first in shipbuilding completed, new orders and orders held for 14 consecutive years, with a market share of more than 50%.
[0003] The rapid development of the shipbuilding industry puts forward higher requirements for the production, quality and variety of marine steel, especially marine section steel. It is estimated that from 2024 to 2029, 1500 million tons of marine steel will be needed annually, of which more than 140 million tons of marine section steel will be needed annually.
[0004] Marine section steel is a key structural steel for shipbuilding, used to manufacture ship keels and stiffeners, and is the core material of large ships. Commonly used marine section steel internationally includes L-shaped steel, marine T-shaped steel, and bulb flat steel, among which Japan and South Korea mainly use L-shaped steel and marine T-shaped steel, while China and Europe mainly use bulb flat steel. Some marine section steels such as marine T-shaped steel are not produced by domestic enterprises, and are currently replaced by welded products. Bulb flat steel is composed of a flat web and a bulb head, and L-shaped steel is composed of a thin long leg and a thick short leg, both of which are asymmetric section steels. The single-branch rolling process is asymmetric, and the extremely uneven and asymmetric cross-section leads to a large bending deformation after cooling on the cooling bed, which greatly affects the smoothness of the rolling and straightening production process and the quality of the product. With the continuous development of the shipbuilding industry, marine T-shaped steel has gradually gained attention due to its good structural stability, large carrying capacity, and steel saving characteristics. However, marine T-shaped steel is composed of a thin long waist and a short thick leg, and many domestic marine section steel production enterprises do not have universal rolling mills and cannot roll it, so currently domestic welded T-shaped steel is still used as a substitute.
[0005] The majority of domestic shipbuilding steel production enterprises basically adopt horizontal arrangement for the arrangement of rolling mills, and the rolling mills are mostly semi-open two-roller or three-roller mills. The commonly used rolling process adopts a rectangular blank to pass through multiple cutting holes, preforming holes and forming holes to finally roll into standard bulb steel, L-shaped steel, unequal angle steel and other shipbuilding steel products. The production process is backward, the equipment level is low, the production efficiency is low, the rolling pass is multiple, the rolling roller is large in input and consumption, and due to the serious asymmetry of the cross section of the shipbuilding steel, the cooling after rolling is uneven, the bending is serious, which causes adverse effects on straightening and product shape control. Moreover, since no universal rolling mill is configured, the shipbuilding T-shaped steel required by shipbuilding enterprises cannot be produced. Developing a new shipbuilding steel production process has become an important target of domestic rolling mills. Content of the utility model
[0006] In order to overcome the above defects, the purpose of the utility model is to provide a production system of shipbuilding steel.
[0007] In order to achieve the above purpose, the production system of shipbuilding steel of the utility model comprises a blooming mill area, a finishing mill area, a hot saw area, a cooling bed area, a straightening area and a cold saw area arranged in sequence; wherein,
[0008] The blooming mill area is provided with two blooming mills arranged separately;
[0009] The finishing mill area is provided with multiple rolling mills arranged continuously;
[0010] The hot saw group is provided with fixed hot saws and / or movable hot saws;
[0011] The straightening area is provided with a straightening machine;
[0012] The sawing area is provided with fixed cold saws and / or movable cold saws.
[0013] Further, a stacking and collecting area is arranged after the cold saw area.
[0014] Further, when the system adopts a conventional pass method to produce shipbuilding steel, the blooming mill area is provided with two blooming mills; the finishing mill area is provided with three to five two-roller rolling mills to roll out single shipbuilding steel by the pass method; then the hot saw group is used for segmentation, and the cold bed is used for sizing, and the single straightening, stacking, bundling and collecting are performed.
[0015] Further, when the system adopts a double-splicing pass method to produce shipbuilding steel, the blooming mill area is provided with two blooming mills, and the finishing mill area is provided with three to five two-roller rolling mills to roll out double-splicing shipbuilding steel by the pass method; then the hot saw is used for tail cutting, the cold bed is used for long-size cooling, the profile is divided, the straightening, grouping, cold sawing, sizing, stacking and bundling are performed, and the collecting is performed.
[0016] Further, the system adopts the double-pinning universal method to produce the marine steel, the breakdown rolling mill area is provided with 2 breakdown rolling mills, the finishing rolling mill area is provided with 5 universal rolling mills and 2 edging rolling mills, a total of 7 rolling mills, the double-pinning marine steel is rolled in the universal mode; then the long piece is cut by the hot saw, cooled on the cooling bed, split, straightened, grouped, cut to size by the cold saw, stacked and baled and collected.
[0017] To achieve the above object, the novel high-efficiency production process of the marine steel comprises, in sequence, a breakdown step, a finishing rolling step, a hot sawing step, a cooling bed step, a straightening step and a cold sawing step.
[0018] Further, the process is further provided with a stacking and collecting step after the cold sawing step.
[0019] Further, when the process adopts the conventional groove method to produce the marine steel, the breakdown step is completed by 2 breakdown rolling mills; the finishing rolling step is completed by 3-5 two-roller rolling mills to roll the single-pinning marine steel by the groove method; then the long piece is cut by the hot sawing unit, cooled on the cooling bed, straightened, stacked and baled and collected.
[0020] Further, when the process adopts the double-pinning groove method to produce the marine steel, the breakdown step is completed by 2 breakdown rolling mills; the finishing rolling step is completed by 3-5 two-roller rolling mills to roll the double-pinning marine steel by the groove method; then the long piece is cut by the hot sawing unit, cooled on the cooling bed, split, straightened, grouped, cut to size by the cold sawing unit, stacked and baled and collected.
[0021] Further, when the process adopts the double-pinning universal method to produce the marine steel, the breakdown step is completed by 2 breakdown rolling mills; the finishing rolling step is completed by 5 universal rolling mills and 2 edging rolling mills to roll the double-pinning marine steel by the universal mode; then the long piece is cut by the hot sawing unit, cooled on the cooling bed, split, straightened, grouped, cut to size by the cold sawing unit, stacked and baled and collected.
[0022] The utility model solves the problem of the rolling line production efficiency of the small-specification marine steel, solves the problem of the large bending deformation of the marine steel in the asymmetric section cooling process, thereby the efficient and advanced production processes such as long piece cooling and long piece straightening are difficult to realize, solves the problem of the incapability of producing the marine T-shaped steel, solves the problems of the large roller consumption, the large number of spare rollers, the low rolling line utilization rate and the like in the groove method rolling of the marine steel, thereby efficient and low-energy-consumption production is realized, the production cost is reduced, and the market competitiveness of the enterprise is improved. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1The embodiment of the utility model discloses a layout drawing of a production system of marine section steel.
[0024] Figure 2 It is the production mode of the conventional groove method rolling marine section steel.
[0025] Figure 3 It is the production mode of the double-punch groove method producing marine section steel.
[0026] Figure 4 It is the production mode of the double-punch universal method producing marine section steel.
[0027] I - breakdown rolling mill area: 1 - breakdown rolling mill one; 2 - breakdown rolling mill two; II - finishing rolling mill area: 3 - universal / two-roller rolling mill one; 4 - universal / two-roller rolling mill two; 5 - edge rolling mill three; 6 - universal / two-roller rolling mill four; 7 - universal / two-roller rolling mill five; 8 - edge rolling mill six; 9 - universal / two-roller rolling mill seven; III - hot saw cold bed area: 10 - hot saw group; 11 - cold bed; IV - straightening area: 12 - splitting device; 13 - straightening machine; V: marshalling cold saw area: 14 - marshalling rack; 15 - cold saw group; VI - stacking collection area: 16 - stacking rack; 17 - baling device; 18 - collection device. DETAILED DESCRIPTION
[0028] The embodiments of the utility model will be described below in conjunction with the drawings.
[0029] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0030] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0031] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "link", "connection" should do the broad sense understanding, for example, can be fixed connection, can be detachable connection, or integrally connected, can be direct connection, can indirectly connect through the intermediate medium, can be two elements inside the communication. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0032] Embodiment 1
[0033] As Figure 1 The novel efficient production process of the marine section steel of the embodiment includes the production procedures such as breakdown rolling mill area, finishing rolling mill area, hot sawing area, cooling bed area, straightening area, sawing area and stacking collection area. The breakdown rolling mill area is separately arranged with two breakdown rolling mills; the finishing rolling mill area is continuously arranged with seven rolling mills including five universal two-roll rolling mills; the hot sawing unit is provided with two hot saws; the cooling bed is provided with a split straightening machine; the cold sawing unit is provided with three cold saws; and the stacking collection is provided.
[0034] Embodiment 2
[0035] As Figure 2 The production mode of the embodiment adopting the conventional pass method to roll the marine section steel is that the breakdown rolling mill area is provided with two breakdown rolling mills and a finishing rolling mill unit. The rolled piece is rolled by the first breakdown rolling mill for 5-7 passes, is sent to the second breakdown rolling mill by a roller way, is rolled by the second breakdown rolling mill for 3 passes, is moved to the finishing roller way by a transverse moving rack, is rolled by the finishing rolling mill unit for 3-5 passes by the two-roll rolling mill according to the size of the specification to roll out single marine section steel, is segmented by the hot sawing unit, is sized on the cooling bed, is straightened, is stacked, and is collected by bundling. The conventional pass method is the most commonly used rolling process technology at home and abroad at present, which is mature and reliable.
[0036] Embodiment 3
[0037] As Figure 3 The production mode of the double-pinned pass method to produce the marine section steel is that the breakdown rolling mill area is provided with two breakdown rolling mills and a finishing rolling mill unit. The rolled piece is rolled by the first breakdown rolling mill for 3-7 passes, is sent to the second breakdown rolling mill by a roller way, is rolled by the second breakdown rolling mill for 3 passes, is moved to the finishing roller way by a transverse moving rack, is rolled by the finishing rolling mill unit for 3-5 passes by the two-roll rolling mill according to the size of the specification to roll out double-pinned marine section steel, is cut by the hot sawing unit, is cooled on the cooling bed, is split, is straightened, is grouped, is sized by the cold sawing, is stacked, and is collected by bundling. The product rolled by the double-pinned pass method is formed by a pair of double-pinned, solves the large bending deformation in the asymmetric section cooling process of the marine section steel, so that the long-size cooling and long-size straightening process can be adopted, the cooling efficiency, the straightening efficiency and the straightening quality are greatly improved, and the hot sawing efficiency is improved, and the production line efficiency is greatly improved.
[0038] Example 4
[0039] As Figure 4 shown, the production mode for producing marine steel by double-pair universal method is that the rolling mill area uses two billet rolling mills and a finishing rolling mill set, the rolled piece is rolled by three to seven passes by the first billet rolling mill, is sent to the second billet rolling mill by a roller way, and is rolled by three passes by the second billet rolling mill; then the rolled piece is moved to a pre-finishing roller way by a transverse moving rack.
[0040] The finishing rolling mill set uses five universal rolling mills and two edge rolling mills, and the double-pair marine steel is rolled by the universal mode; then the long piece is cooled on a cooling bed after being cut by a hot saw, is split, is straightened, is grouped, is cut to a fixed length by a cold saw, is stacked, and is collected by bundling.
[0041] The double-pair universal method and the double-pair groove method can solve the large bending deformation of the asymmetric section of the marine steel in the cooling process, so that the long piece cooling and long piece straightening process can be adopted, and the cooling efficiency, the straightening efficiency and the straightening quality are greatly improved; meanwhile, the hot saw efficiency is improved, and the production line efficiency is greatly improved.
[0042] The finishing rolling mill set adopts the universal method to replace the closed groove, which can produce the marine T-shaped steel and other products that cannot be rolled by the groove method, expand the product variety of the enterprise, improve the commonality of the rolling mill, reduce the number of spare rolling mills of the finishing rolling mill, increase the rolling amount of the rolling mill by one-time cutting of the rolling mill, improve the utilization efficiency of the rolling mill, reduce the number of rolling mill replacement, realize high-efficiency and low-energy-consumption production, reduce the production cost, and improve the market competitiveness of the enterprise.
[0043] The utility model is described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by those skilled in the art without departing from the purpose of the utility model. Many other changes and modifications can be made to the concept and range of the utility model without departing from the concept and range of the utility model, and should be regarded as the protection range of the utility model.
[0044] In the description of the present specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
[0045] The above merely describes specific implementation manners of the utility model, but the protection range of the utility model is not limited to this, and any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection range of the utility model. Therefore, the protection range of the utility model should be subject to the protection range of the claims.
Claims
1. A system for producing a shipbuilding steel, characterized by: The system comprises a blooming mill area, a finishing mill area, a hot saw area, a cooling bed area, a straightening area and a cold saw area arranged in sequence, wherein, The blooming mill area is provided with two blooming mills arranged separately; The finishing mill area is provided with a plurality of rolling mills arranged in series; The hot saw group is provided with fixed hot saws and / or movable hot saws; The straightening area is provided with a straightening machine; The sawing area is provided with fixed cold saws and / or movable cold saws.
2. A system for producing a shipbuilding steel according to claim 1, characterized in that: When the system produces marine steel by using the groove method, the blooming mill area is provided with two blooming mills; the finishing mill area is provided with three to five two-roller rolling mills, and single marine steel is rolled by using the groove method; then, after segmentation by using the hot saw group, the marine steel is placed on the cooling bed, and is collected after single straightening, stacking and bundling.
3. The system for producing a shipbuilding steel according to claim 1, characterized in that: When the system produces marine steel by using the double-splicing groove method, the blooming mill area is provided with two blooming mills, and the finishing mill area is provided with three to five two-roller rolling mills; double-splicing marine steel is rolled by using the groove method; then, after tail cutting by using the hot saw, the long marine steel is placed on the cooling bed for cooling, and is collected after segmentation, straightening, grouping, size cutting by using the cold saw, stacking and bundling.
4. The system for producing a shipbuilding steel of claim 1, wherein: When the system produces marine steel by using the double-splicing universal method, the blooming mill area is provided with two blooming mills, and the finishing mill area is provided with five universal rolling mills and two edge rolling mills, i.e. seven rolling mills in total; double-splicing marine steel is rolled by using the universal method; then, after tail cutting by using the hot saw, the long marine steel is placed on the cooling bed for cooling, and is collected after segmentation, straightening, grouping, size cutting by using the cold saw, stacking and bundling.