Steel stock conveyance facility and manufacturing method

Abstract

To provide a steel stock conveyance facility and a manufacturing method that can prevent degradation of a steel stock during conveyance.SOLUTION: A conveyance facility 1 for conveying a steel stock includes: a conveyance roller 2 including an impeller part 24 installed to a rotor 22; and a drive water supply device 3 for rotating the conveyance roller 2 by jetting water to the impeller part 24.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a steel material conveying facility and a manufacturing method thereof.

Background Art

[0002] Conventionally, idle rollers have been used for conveying rollers used in rolling of steel materials such as bars and wire rods (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the case of a conveying roller as in Patent Document 1, the conveying roller does not rotate immediately before the steel material passes. If the steel material collides with the conveying roller when the conveying roller is not rotating, there is a possibility that flaws may occur on the conveying roller or burrs may adhere to the steel material. When the conveying roller is in such a state, during the conveyance of the steel material, the surface state of the conveying roller is transferred to the steel material, resulting in surface flaws on the steel material. That is, in the conventional conveying roller, the problem was the deterioration of the quality of the steel material during conveyance.

[0005] Therefore, the present invention has been made paying attention to the above problems, and an object thereof is to provide a steel material conveying facility and a manufacturing method capable of preventing the deterioration of the quality of the steel material during conveyance.

Means for Solving the Problems

[0006] (1) According to one aspect of the present invention, there is provided a steel material conveying facility including: a conveying roller having a vane wheel portion provided on a rotating body; and a driving water supply device that rotates the conveying roller by injecting water onto the vane wheel portion.

[0007] (2) In the steel material conveying equipment described in (1) above, cooling water for cooling the conveying rollers is used as the water.

[0008] (3) According to one aspect of the present invention, when manufacturing a steel material, the steel material conveying equipment described in (1) or (2) above is used, and when the steel material passes through the conveying equipment, the driving water supply device rotates the conveying rollers, and a method for manufacturing a steel material is provided.

Advantages of the Invention

[0009] According to one aspect of the present invention, there are provided a steel material conveying equipment and a manufacturing method capable of preventing deterioration in the quality of the steel material during conveyance.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0011] In the following detailed description, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same or similar parts are denoted by the same or similar reference numerals, and duplicate descriptions are omitted. Each drawing is schematic and may include cases where it is different from the actual one. Further, the embodiments shown below are examples of devices and methods for embodying the technical idea of the present invention, and the technical idea of the present invention does not specify the materials, structures, arrangements, etc. of the components as the following. The technical idea of the present invention can be variously modified within the technical scope defined by the claims described in the claims.

[0012] <Steel Material Conveying Equipment> Referring to FIGS. 1 and 2, a steel material conveying facility 1 according to an embodiment of the present invention will be described. The conveying facility 1 is a conveying facility used in a steel material manufacturing facility, and conveys the steel material in one direction. The steel material to be conveyed is, for example, a steel bar or a wire rod. Further, the steel material may be a pipe, a billet, or the like.

[0013] As shown in FIG. 1, the conveying facility 1 includes a conveying roller 2, a driving water supply device 3, and a cooling water supply device 4. In the conveying facility 1, the conveying rollers 2 are respectively provided on both sides in the left - right direction of the steel material to be conveyed, guide the steel material to be conveyed from the left - right direction, and assist in the conveyance of the steel material. Here, the left - right direction is a direction perpendicular to the conveying direction of the steel material and parallel to the horizontal direction. Also, in the conveying facility 1, conveying rollers are provided on the lower side in the vertical direction of the steel material to be conveyed. The lower conveying rollers are not particularly limited, and may be idler rollers, or may be configured to be rotatable by receiving a driving force from a motor or the like when rotational driving is required. And in the conveying facility 1, the conveyance of the steel material is assisted by the rotation of the conveying roller 2 by the method described later using the driving water supply device 3.

[0014] As shown in FIGS. 1 and 2, the conveying roller 2 has a rotating shaft 21, a rotating body 22, two bearings 23, and an impeller portion 24. The conveying roller 2 is provided such that a cylindrical rotating body 22 is inserted through the rotating shaft 21 via two bearings 23.

[0015] The impeller section 24 is provided at the end of the rotating body 22 in the axial direction (the direction parallel to the rotation axis of the rotating body 22, which is the vertical direction in FIG. 1 and the left - right direction in FIG. 2(B)). The impeller section 24 is formed by a plurality of protruding impeller blades 241 arranged at equal intervals in the circumferential direction of the rotating body 22. The shape and number of the impeller blades 241 are not particularly limited, but as will be described later, they are set to a shape and number that can receive the water sprayed from the driving water supply device 3 and enable the rotating body 22 to rotate at the target rotational speed. Also, in terms of the equipment structure, when there is a possibility that the tip of the impeller blade 241 may come into contact, the height of the impeller blade 241 (the length in the radial direction of the rotating body 22) is preferably provided so that the tip of the impeller blade 241 does not protrude from the surface of the rotating body 22 in the bottom view of the conveying roller 2. By doing so, contact between the conveyed steel material and the impeller blade 241 can be prevented. Note that if the impeller section 24 and the steel material do not come into contact due to the equipment structure, there is no need to limit the height of the impeller blade 241.

[0016] Also, the impeller section 24 may be formed by processing the surface of the rotating body 22. By doing so, it can be more easily applied to existing conveying equipment compared to the case where the rotating body 22 and the impeller section 24 are joined and integrated.

[0017] The driving water supply device 3 is a device such as a nozzle that sprays the water supplied from a supply device (not shown) as driving water for rotationally driving the conveying roller 2 onto the impeller section 24. The water sprayed from the driving water supply device 3 preferably has a water pressure of 1 kg / cm 2 or more and 2 kg / cm 2 or less. In this embodiment, when the steel material passes through the conveying roller 2, it is sufficient if the conveying roller 2 rotates. Also, since the conveying roller 2 does not require a large rotational driving force compared to rolling rolls, etc., even low water pressure and low flow rate of the sprayed driving water are sufficient. Therefore, by setting the sprayed driving water to a low water pressure and low flow rate, the installation cost can be reduced. Also, as will be described later, it is possible to use cooling water with a low water pressure and low flow rate for cooling the conveying roller 2.

[0018] The cooling water supply device 4 cools the transport roller 2 by spraying cooling water supplied from a supply device (not shown) onto the rotating body 22 of the transport roller 2. The cooling water supply device 4 is configured by, for example, a nozzle or the like.

[0019] Here, the direction and position of injection of driving water from driving water supply device 3 are not particularly limited as long as the driving water collides with impeller portion 24 and conveyance roller 2 rotates in the conveyance direction of the steel material.

[0020] The water supplied to the driving water supply device 3 is not particularly limited, and may be, for example, cooling water supplied to the cooling water supply device 4. In this case, cooling water is supplied to the cooling water supply device 4 and the driving water supply device 3 from a supply device (not shown). Alternatively, cooling water may be branched from the path that supplies cooling water to the cooling water supply device 4 and supplied to the driving water supply device 3. This simplifies the equipment configuration and makes it easy to apply to existing equipment.

[0021] <Steel manufacturing method> Next, a method for manufacturing a steel material according to this embodiment will be described. In this embodiment, a conveying facility 1 is used when conveying the steel material. For example, when the steel material is a steel bar, wire rod, pipe, or the like, the conveying facility 1 may be used when conveying the rolled steel material to the next process. Furthermore, when the steel material is a billet, or the like, the conveying facility 1 may be used when conveying the steel material after continuous casting or heating to the next process.

[0022] In the method for transporting steel materials using the transport equipment 1, when the steel materials pass through the transport equipment 1, the drive water supply device 3 rotates the transport rollers 2. Specifically, before the steel materials pass through the transport rollers 2, the transport rollers 2 are rotated by injecting drive water onto the impeller section 24, and the steel materials are passed through the rotated transport rollers 2. The rotation speed of the transport rollers 2 is preferably adjusted to be approximately the same as the transport speed according to the transport speed. Note that the rotation speed of the transport rollers 2 can be adjusted by the water pressure and flow rate of the drive water, the orientation of the nozzle for injecting the drive water (the injection direction of the drive water), the number and shape of the blades 241 of the impeller section 24, etc. Also, the transport speed of the steel materials is preferably 0.5 m / s or more. Note that it is also preferable to rotate the transport rollers 2 using drive water even while the steel materials are passing through the transport rollers 2.

[0023] In this embodiment, by rotating the transport rollers 2 with drive water when the steel materials pass through, it is possible to reduce the occurrence of scratches on the transport rollers 2 and the adhesion of scale of the steel materials to the transport rollers 2 when the steel materials come into contact with the transport rollers 2. Thereby, it is possible to reduce the occurrence of surface scratches on the steel materials during the transport of the steel materials by the transport equipment 1, and to prevent the deterioration of the quality of the steel materials during transport.

[0024] Also, as a method for driving the rollers, a method using a motor or the like can be considered, but in the case of the transport rollers 2, such a driving method cannot be adopted from the viewpoints of the equipment mechanism and the installation space. However, according to this embodiment, the equipment related to driving can be made smaller, and it becomes easier to apply to the transport rollers 2. Furthermore, compared with the driving method using a motor or the like, since it is a small and simple driving mechanism, the installation cost can be reduced.

[0025] <Modification Example> Although the present invention has been described above with reference to specific embodiments, it is not intended that the invention be limited by these descriptions. By referring to the description of the present invention, other embodiments of the present invention that include various modifications in addition to the disclosed embodiments will be apparent to those skilled in the art. Therefore, it should be understood that the embodiments of the invention set forth in the claims also encompass embodiments that include these modifications described herein, either alone or in combination.

[0026] For example, in the above embodiment, the transport rollers 2 are provided on both the left and right sides of the steel material being transported, but the present invention is not limited to this example. For example, the transport rollers 2 may be provided below the steel material being transported and transport the steel material while supporting it from below.

[0027] In the above embodiment, the transport rollers 2 rotate in one direction to transport the steel material. However, the present invention is not limited to this example. The transport rollers 2 may be configured to rotate in two directions, forward and reverse. In the case of transport rollers 2 provided on both the left and right sides as in the above embodiment, the transport directions of the left and right transport rollers 2 are different, so it is preferable that the transport rollers 2 be configured to rotate in two directions. Furthermore, depending on the equipment in which the transport rollers 2 are installed, the steel material may be transported in two opposite directions. In such equipment, the transport rollers 2 must rotate in two directions, forward and reverse. In such cases, the driving water supply unit 3 is configured to spray driving water in two directions corresponding to the rotation direction of the transport rollers 2. For example, the driving water supply unit 3 may be configured so that the nozzle tip can be moved to change the spray direction of the nozzle spraying the driving water. Furthermore, the driving water supply unit 3 may have two nozzles that spray driving water in different directions, and be configured to selectively spray driving water from one of the two nozzles.

[0028] Furthermore, in the above embodiment, the impeller portion 24 is provided at the axial end of the rotor 22 of the transport roller 2, but the present invention is not limited to this example. The impeller portion 24 may be provided at a location other than the axial end of the rotor 22, as long as the impeller portion 24 does not come into contact with the steel material being transported, or if it does come into contact, no problems arise in terms of the quality of the steel material. [Example]

[0029] Next, an example conducted by the present inventors will be described. In this example, the conveying equipment 1 according to the above embodiment was used when conveying rolled steel material in a steel material (wire material / bar material) manufacturing process, and the occurrence of surface defects in the conveyed steel material was investigated.

[0030] In this example, impeller sections 24 are provided for transport rollers 2 provided on both the left and right sides of the steel material traveling direction, and driving water supply devices 3 are provided to spray driving water onto impeller sections 24. Impeller sections 24 are formed by processing the surface of the axial end (lower end) of rotor 22 of transport roller 2. Furthermore, driving water supply devices 3 use cooling water to cool transport roller 2 as driving water, and are configured to branch the cooling water path and spray the cooling water from nozzles as driving water.

[0031] In addition, the rotation speed of the conveying roller 2 is greater than 0.5 m / s, which is the theoretical minimum conveying speed of steel material, and taking into consideration the size of the conveying roller 2 (outer diameter φ90 mm) and processing costs, 12 blades 241 are arranged at equal intervals in the impeller section 24.

[0032] Furthermore, in this example, when the steel material passes through the conveying rollers 2, driving water is sprayed from the driving water supply device 3 onto the impeller portion 24 to rotate the conveying rollers 2. The rotation speed of the conveying rollers 2 is adjusted according to the conveying speed of the steel material.

[0033] As a result of the examples, the number of troubles caused by surface defects on the steel material decreased, and the rolling stop time due to these troubles decreased by 0.5 Hr / month. Also, due to the reduction in the occurrence of surface defects, the downgrading of products caused by surface defects decreased by 0.5 t / month.

Explanation of Signs

[0034] 1 Conveying Equipment 2 Conveying Roller 21 Rotating Shaft 22 Rotating Body 23 Bearing 24 Impeller Section 241 Blade 3 Driving Water Supply Device 4 Cooling Water Supply Device

Claims

1. A conveying facility for conveying steel materials, comprising: a conveying roller having a vane wheel portion provided on a rotating body; a driving water supply device that rotates the conveying roller by spraying water onto the vane wheel portion; The conveying facility for steel materials is provided with the above components.

2. The conveying facility for steel materials according to Claim 1, wherein cooling water for cooling the conveying roller is used as the water.

3. When manufacturing steel materials, the conveying facility for steel materials according to Claim 1 or 2 is used, A method for manufacturing steel materials, wherein the conveying roller is rotated by the driving water supply device when the steel materials pass through the conveying facility.

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