JPH0218364B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a coil anti-corrosion cooling device.

(Prior art and its problems) Conventionally, coils that have been annealed in a coiled state in an annealing furnace, for example, are kept at 35°C in a stockyard or in a rust-prevention cooling yard until they are sent to the next skin-pass rolling process. It is designed to be cooled to ~45℃.

The cooling is performed by natural cooling in the former case, and by blowing dehumidified air in the latter case.

However, the former method requires a large space in the stockyard because it takes four to six days to cool the coil, and there are also problems in that rust may occur during that period.

On the other hand, the latter method not only requires a large sealed rust-proof cooling yard, but also requires a large amount of dehumidified air, which poses the problem of significantly increasing equipment costs, operating costs, etc.

Furthermore, both require an overhead crane and require a lot of labor when handling the coils.

The present invention has been made to solve the above-mentioned conventional problems, and focuses on the fact that heat transfer from the end face of the coil is about 10 times better than from the outer and inner peripheries. It is an object of the present invention to provide a coil rust-preventing cooling device that uses dehumidified air, has a short cooling time, and allows easy handling of the coil.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a conveying device that intermittently moves annealed coils one pitch at a time in a tunnel-like casing equipped with a charging door and an extraction door. and supplying dehumidified air into the casing, and at the coil stop position,
A convector is disposed in contact with and separated from the end face of the coil, and a dehumidified air circulation path for cooling and supplying the atmosphere inside the casing is provided in the convector to impart convective heat transfer to the end face of the coil.

(Example) Next, the present invention will be explained according to the drawings which are one example.

In FIG. 1, reference numeral 1 denotes a tunnel-shaped casing (hereinafter referred to as casing) with a rust-preventing cooling zone inside, and its openings on both sides are equipped with a charging door 2 and an extraction door 3, and an air curtain device 4. ,5
has. Note that a charging vestibule or an extraction vestibule may be provided as necessary.

A roller conveyor device (conveying device) 6 is provided on the floor of the casing 1 and is driven intermittently. Note that W is a coil that is placed parallel to the conveying direction and with its end face perpendicular to the floor (down-end shape), and 7 is a coil mounting table.

On both sides of the casing 1 at the stop position of the coil W, as shown in FIG.
A convector 8 in which a flow path 10 is formed by a large number of involute curved ribs 9 is attached to a casing 1.
The air cylinders 11 provided on the side walls of the coils W are arranged so as to come into contact with and separate from each other with respect to the end surfaces of the stopped coils W. Note that the rib 9 is not limited to an involute shape, but may be arcuate, radial, or the like.

On the other hand, as shown in FIG. 2, a circulation fan 12 is installed on the ceiling of the casing 1, and the atmosphere sucked and pressurized by the circulation fan 12 is cooled by the heat exchanger 13. The air is supplied to the convector 8 through the passage 14, and the circulation fan 12 and the passage 14 form a dehumidified air circulation path. Note that the heat exchanger 13 may be provided on the inlet side of the circulation fan 12.

FIG. 3 shows a system diagram of the embodiment, and shows the casing 1
The inside is divided into a plurality of zones, and each zone is equipped with one circulation fan 12 and a heat exchanger 13, and the cooled atmosphere is supplied to other convectors 8 through branch passages 14a.

In addition, as shown in FIGS. 3 and 4, in the extraction side zone, a bypass passage 15 is provided across the heat exchanger 13, and the temperature of the atmosphere supplied to the convector 8 is detected by a temperature detector 16. The flow rate control valve 17 is adjusted so that the temperature of the supplied atmosphere is close to the target cooling temperature of the coil, thereby preventing dew condensation due to overcooling of the coil. However, this is not necessary.

Further, dehumidified air is supplied into the casing 1 through a supply pipe 18 from a dehumidified air supply device (not shown).

Because of the above configuration, the coil W coming out of the annealing furnace (not shown) is placed on the coil mounting table 7 in the loading section A, and is sequentially loaded into the casing 1 as the roller conveyor device 6 is driven intermittently. At the same time, after being intermittently conveyed in the casing 1 and cooled as described below, it reaches the unloading section B.
From here, it is transported to, for example, a temper rolling process.

Note that when loading and unloading the coil W into the casing 1, the charging door 2 and the extraction door 3 are opened, and at the same time, outside air is introduced into the casing 1 by the blowing gas (dehumidified air) from the air curtain device 6. Prevent intrusion.

As described above, when the coil W stops within the casing 1, the air cylinder 11 is activated and the convector 8 comes into contact with both end surfaces of the coil W.
The pressure is increased by the circulation fan 12, and the heat exchanger 13
The atmosphere inside the casing 1 cooled by this is discharged from the involute passage 10 of the convector 8 through the discharge port 10a while cooling all end faces of the coil W.

When the coil W begins to move, the air cylinder 11 moves the convector 8 away from the end surface of the coil W.

In this way, when the coil W reaches the final zone on the extraction side, the coil W is heated to a predetermined temperature (35°C
~45℃) and extracted.

Note that the shape of this device is not limited to a linear type, but may be an annular rotating bed type or other shapes.
The conveyance device may also be a trapezia type or a trolley type.

(Effects of the Invention) As is clear from the above explanation, according to the present invention, when the coil is rust-prevented and cooled, the coil is run inside a tunnel-shaped casing. This greatly reduces the amount of dehumidified air consumed, and not only can the dehumidified air supply device be made more compact, but since the amount of dehumidified air supplied is small, humidity can be easily controlled and good anti-corrosion cooling can be achieved. .

In addition, since convection heat transfer is applied to the end face of the coil for cooling, cooling efficiency is high and cooling time can be shortened. Not only can the tunnel-shaped casing be made smaller, but the above effects can be achieved more effectively. .

Furthermore, it can accommodate various coil widths, and since coils are extracted in the order they are loaded, the coil management process is easy, no overhead crane is required, and coil handling can be easily automated. In addition, the coil car that connects the annealing equipment and the temper rolling equipment can be used in place of the conveyor, which has many advantages.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram mainly of the tunnel-shaped casing of the coil anti-corrosion cooling device according to the present invention, Fig. 2 is an enlarged sectional view taken along the line - - in Fig. 1, Fig. 3 is a system diagram of dehumidified air, and Fig. 4 is a plan view of FIG. 2, and FIG. 5 is a front view of the convector. 1...Tunnel-shaped casing, 2...Charging door,
3...Extraction door, 6...Roller conveyor device (conveyance device), 8...Convector, 11...Air cylinder, 12...Circulation fan, 13...Heat exchanger, 1
4... Passage, 15... Bypass passage, 16... Temperature detector, 17... Flow rate control valve, 18... Dehumidified air supply pipe.

Claims (1)

[Claims] 1. In a tunnel-shaped casing equipped with a charging door and an extraction door, a conveying device for intermittently moving annealed coils one pitch at a time is provided, and dehumidified air is supplied into the casing, Further, a convector that contacts and separates from the end face of the coil is disposed at the coil stop position, and a dehumidified air circulation path that cools and supplies the atmosphere inside the casing is provided in the convector to impart convective heat transfer to the end face of the coil. A coil rust-proof cooling device characterized by: 2. The convector located in a predetermined zone on the extraction side is independent of the dehumidified air circulation path of other convectors, and the independent circulation path includes temperature control means for maintaining the atmospheric gas supplied to the convector at a predetermined temperature. Claim 1 characterized in that:
Coil anti-corrosion cooling device described in section.