JPH0715104U - Shaped steel cooling system - Google Patents

Abstract

(57) [Summary] [Purpose] The number of hoses for supplying cooling medium to the manifold header is reduced, the structure of cooling medium equipment to the nozzle is simplified, and the nozzle mounting position and angle are set accurately. To obtain a shaped steel cooling device capable of reducing changes in the position and angle of the nozzle due to aging. [Structure] A plurality of injection member mounting holes 4a to 4d are formed in a manifold type header 1 having a rectangular parallelepiped block shape, and a nozzle 10 for injecting a cooling medium is individually mounted in each of the injection member mounting holes. A plurality of the manifold type headers 1 are arranged in at least one of the direction along the traveling direction of the shaped steel and the vertical direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cooling device in a rolling line for shaped steel such as channel steel, angle steel, and H-shaped steel.

[0002]

[Prior art]

 Generally, the temperature difference due to the thickness difference between the flange and the web during H-section steel production causes thermal stress inside the H-section steel. In recent years, the number of H-section steels with a large thickness ratio between the flange and the web is increasing, but in such H-section steels, the residual stress due to thermal stress is large, which is a cause of shape defects such as web waves.

In order to eliminate the occurrence of this shape defect, a device for cooling the flange of the H-section steel with water as a cooling medium is provided to reduce the temperature difference and suppress the generation of thermal stress. However, it is necessary to appropriately control the flow rate of water for cooling, the water injection area to the surface to be cooled, the collision force, etc., so that the shaped steel can be uniformly cooled with the demand for higher manufacturing size accuracy. Was occurring.

As a conventional device that meets such a demand, there is, for example, one proposed by the applicant of the present invention in Japanese Patent Application No. 4-126214. In this device, multiple water jetting areas are arranged in the vertical direction within the heightwise interval of the surface to be cooled, and the jetting area on the surface to be cooled of the shaped steel has a uniform collision pressure distribution. In order to achieve high efficiency cooling,

Further, as a method for increasing the cooling ability of the surface to be cooled of the shaped steel, for example, there is one described in Japanese Patent Application No. 3-188912 previously proposed by the present applicant. In this method, in order to keep the variation of the collision force of the cooling water within ± 20% of the set value, the water film pattern has a rectangular shape or an oval shape, and the water film thickness at the part that collides with the surface to be cooled. It used to set the impact force of the cooling water from the nozzle to the surface to be cooled in the range of 0.2-0.5 g / mm ² to of the above 20 mm, by multistage nozzles, the H-beam flange The temperature is controlled in the width direction to meet the demand for higher precision manufacturing size.

[0006]

[Problems to be solved by the device]

 However, in all of the conventional cooling devices for shaped steels, water is supplied to the nozzles by separate pipes and hoses, so the position and angle of the nozzles cannot be set accurately. However, there is a problem in that maintenance and management of the nozzles are necessary to perform highly accurate cooling control because of changes in the position and angle of the nozzles over time.

Further, when the nozzle pitch is narrowed and the number of nozzles is increased, the number of nozzles is increased and the water supply equipment to the nozzles is complicated. The present invention has been made to solve the above problems, and can reduce the number of hoses for water supply, simplify the structure of the cooling medium supply equipment to the nozzle, and improve the nozzle mounting position and It is an object of the present invention to provide a shaped steel cooling device that can set the angle with high accuracy, has little change in the position and angle of the nozzle due to aging, and can perform highly accurate cooling.

[0008]

[Means for Solving the Problems]

 In view of this, the present invention relates to a cooling apparatus for a shaped steel that cools a shaped steel by injecting a cooling medium onto a surface to be cooled, and forms a plurality of injection member mounting holes in a manifold-type header having a rectangular parallelepiped block shape. An injection member for injecting a cooling medium is individually attached to each of the injection member mounting holes.

In addition, a manifold type header in which the injection members are individually attached to the injection member attachment holes and the injection members are arranged in a row is provided with a direction along the traveling direction of the shaped steel, and an upward and downward direction. It is preferable to arrange a plurality of them in at least one of the directions.

[0010]

[Action]

 In the device according to the present invention, the cooling medium passes through the internal flow path of the manifold-type header and is supplied to the plurality of injection members through the mounting holes communicating with the internal flow path. The cooling medium is jetted in the jet pattern to cool the surface to be cooled. One cooling medium supply path to the manifold header is sufficient for the cooling medium injected from the plurality of injection members.

Further, by arranging a plurality of manifold headers in at least one of the direction along the traveling direction of the shaped steel and the vertical direction, the supply area of the cooling medium to the shaped steel can be increased and adjusted.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are views showing an embodiment of the present invention. In the figure, reference numeral 1 is a manifold type header composed of a rectangular parallelepiped block body having high corrosion resistance and rigidity. This manifold type header 1 is internally formed with an internal flow passage 2 having a circular cross-section extending in the longitudinal direction, and a water supply port 3 is communicated with the internal flow passage 2 from a back side via a water supply passage 5. In addition, a plurality of, for example, five mounting holes 4a to 4e are communicated from the front side while maintaining a predetermined pitch (for example, 100 mm), and the mounting holes 4a to 4e are arranged in a line. Here, each of the mounting holes 4a to 4e is, if necessary, as shown in FIG. 2 which is a plan view, a predetermined angle (for example, about 15 °) in a clockwise direction with respect to a direction perpendicular to the longitudinal direction of the manifold header 1. ) It may be drilled at an angle. Further, the height of the manifold header 1 is selected so that the injection pattern of the cooling medium ejected from the injection nozzle 10 described later can be made continuous in the vertical direction when the height is increased in the vertical direction. . Then, the inner diameter d of the internal flow path 2 and the flow rate q of the cooling medium composed of water or a gas-liquid mixture supplied from the water supply port 3 are such that the average flow velocity of the cooling medium in the internal flow path 2 is a predetermined value (for example, 1 m / sec or less).

Injecting members 6A to 6E are individually attached to the respective mounting holes 4a to 4e of the manifold header 1. Each of these injection members 6A to 6E has a short pipe 7 whose one end is screwed into the mounting holes 4a to 4e, and an in-line check valve 8 screwed to the short pipe 7 to improve the injection response. A nozzle 10 is connected to the in-line check valve 8 via a short pipe 9. Here, in the nozzle 10, the cooling medium to be sprayed from now on has a spray width of, for example, 125 mm, a spray width of, for example, 50 mm downward from the nozzle spray position (vertical direction), and a spray thickness of, for example, 50 mm in the horizontal direction (advancing The nozzle shape is configured so as to form a rectangular injection pattern P which is the direction.

In the cooling device of this embodiment having the above-described structure, the shaped steel is transferred with its surface to be cooled substantially vertical and facing the front of the manifold header 1. A hose (not shown) is connected to the water supply port 3 of the manifold header 1, and cooling water, which is a cooling medium, is supplied to the internal flow path 2 from this hose. Then, the cooling water flows through the internal flow path 2 of the manifold-type header 1, is diverted at the respective mounting holes 4a to 4e, and is jetted from the jet nozzles 10 of the jet members 6A to 6E attached to these, thereby making Cool the surface to be cooled.

A plurality of such manifold headers 1 are arranged side by side in at least one of the vertical direction and the traveling direction of the shaped steel in accordance with the height of the surface to be cooled of the shaped steel to cool a wide range. It can be performed. It is possible to select one of a mode of stacking in the vertical direction, a mode of arranging in a row in the traveling direction of shaped steels, and a mode of arranging a plurality of vertically stacked ones in the traveling direction.

For example, FIG. 3 is a front view of a plurality of manifold type headers 1 shown in FIG. 1 which are vertically stacked and a plurality of which are stacked side by side. This lateral direction is the direction along the traveling direction of the shaped steel, and the intermediate portion in the same direction is omitted in the figure. In addition, in FIG. 4, when stacking a plurality of manifold type headers 1 vertically, a spacer 11 is interposed between the headers 1 to adjust the interval between the upper and lower manifold type headers 1. It should be noted that it is possible to arrange the same not only in the vertical direction but also in the horizontal direction as shown in FIG. The chain line in FIG. 4 indicates a case where the elements are arranged in the horizontal direction.

Further, when stacking a plurality of manifold type headers 1 as shown in FIGS. 3 and 4 and arranging them in the lateral direction, a plan sectional view is shown in FIG. 5 and a front view is shown in FIG. As described above, it is preferable to place the face plate 12 on the front surface of each manifold type header 1 and arrange the manifold type header 1 so as to fit the face plate 12. At this time, holes 13 are formed in the face plate 12 so that the nozzles 10 face the surface of the face plate 12. In addition, a positioning member 14 is interposed between the stacked manifold type header 1 and the adjacent manifold type header 1 which is separately stacked. The positioning member 14 is fixed to the back surface of the face plate 12 by means such as welding. Further, a support plate 15 is similarly fixed to the lower surface of the face plate 12 on the back side so that the load of each of the stacked manifold type headers 1 can be supported thereby, so that the face plate is integrated. The holder 12, the positioning member 14, and the support plate 15 constitute a holder for a plurality of manifold type headers 1. Note that, in FIG. 6, only a part of the nozzle 10 and the hole 13 is shown, and the others are omitted.

In the manifold type header 1, it is important to ensure uniform distribution of the divided flow rate to the plurality of nozzles 10. However, according to the test result by the inventor, the internal flow path of the header 1 is If the average flow velocity of the cooling pan flowing through 2 is 1 m / sec or less, practically sufficient homogeneity can be secured. For example, the specifications of the manifold type header 1 are as follows: nozzle flow rate is 4.40 (l / min), pressure is P = 1.5 (kgf / cm ² ), number of nozzles is 5, header supply flow rate is q = 2 2. Set to 0 (l / min).

Further, there is the following relationship among the average flow velocity V, the header supply flow rate q, and the inner diameter d of the manifold header 1. V = q / (π · d 2/4) ...... (1) From these, the average flow velocity V of the inner diameter φ is 25mm manifold type header 1, the equation (1) from V = 22.0 × 10 ^{- 3} ÷ 60 / π × (25 × 10 ⁻³ ) ² /4=0.747. As a result, the injection flow rate from each injection nozzle 10 is as shown in Table 1 below.

[0020]

[Table 1]

That is, it was confirmed that the injection flow rates from the respective injection nozzles 10 in which the nozzle positions are indicated by A, B, C, D, and E in Table 1 are almost the same. Further, when the in-line check valve 8 is connected to the injection members 6A to 6E attached to the attachment holes 4a to 4e of the manifold type header 1 as in the embodiment shown in FIG. It becomes possible to control.

[0022]

[Effect of device]

 As is apparent from the above-described device, in the device according to the present invention, since the plurality of injection members can be attached to the manifold type header, the number of hoses for supplying the cooling medium to the header can be reduced, and The structure of the cooling medium supply facility can be simplified. In addition, since the manifold header has a rectangular parallelepiped block shape, the mounting position and angle of the injection member can be set accurately even when used alone or when a plurality of layers are stacked. Also, since the change in the angle is small, it is easy to maintain and manage the equipment, and it is possible to obtain the effect that highly accurate cooling control can be performed for a long period of time.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a shaped steel cooling device according to the present invention.

FIG. 2 is a schematic configuration diagram of an injection nozzle according to the present invention.

FIG. 3 is a front view showing an example in which manifold headers are stacked and arranged side by side.

FIG. 4 is a front view showing an example in which manifold type headers are stacked with a spacer interposed therebetween.

FIG. 5 is a plan sectional view showing an example in which manifold type headers are stacked along a face plate.

FIG. 6 is a front view of FIG. 5 with some parts omitted.

[Explanation of symbols]

 1 Manifold type header 4a to 4e Mounting hole 6A to 6E Injection member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Minor Fukuda Inventor, Mizushima Kawasaki Dori, Kurashiki City, Okayama Prefecture (without street number) Inside the Mizushima Steel Works, Kawasaki Steel Co., Ltd. (72) Yoji Fujimoto Dr. Mizushima Kawasaki Dori, Kurashiki City, Okayama Prefecture Chome (No house number) Kawashima Steel Co., Ltd. Mizushima Steel Works (72) Inventor Yuzo Tsukuda Yushima Tsukuda, Mizushima Kawasaki Dori, Kurashiki City, Okayama Prefecture (No house number) Kawatetsu Steel Industry Co., Ltd. (72) Inventor Kyosuke Adachi Okayama 1, Kawashima-dori, Mizushima, Kurashiki, Japan (without street number) Kawatetsu Steel Construction Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. A shape steel cooling device for cooling a shape steel by injecting a cooling medium onto a surface to be cooled, wherein a plurality of injection member mounting holes are formed in a manifold type header having a rectangular parallelepiped block shape, and at the same time, A cooling device for a shaped steel, wherein an injection member for injecting a cooling medium is individually attached to each injection member attachment hole. 2. A manifold-type header in which the injection members are individually mounted in the respective injection member mounting holes, and the injection members are mounted in a row is provided in a direction along the traveling direction of the shaped steel and in a vertical direction. The cooling device for the shaped steel according to claim 1, wherein a plurality of the cooling devices are arranged in at least one of the directions.