JPH0728958U - Continuous annealing / hot dipping treatment equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a processing apparatus in which the switching time of a running steel strip passage line is shortened when processing is switched from a continuous annealing step to a hot dip coating step and vice versa. [Structure] A bendable mechanism snout is provided at the steel strip outlet of the continuous annealing furnace so that it can be driven, and the molten plating bath dipping roll and deflector roll of the steel strip running through the snout can escape and move. The continuous annealing and hot dip plating processing equipment provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a continuous annealing / hot dipping treatment equipment for processing a steel strip that has passed through a common line by switching from the continuous annealing step to the hot melt plating step and vice versa.

[0002]

[Prior art and its problems]

 Continuous annealing and hot dip galvanizing treatment equipment that manufactures cold-rolled steel sheets with excellent workability and different hot-dip galvanized steel sheets with different steel types is being constructed from the viewpoint of low equipment cost. Among them, the problem is, for example, when moving from hot dip equipment to continuous annealing equipment, how to move the snout of the hot dipping equipment and the hot dip immersion roll to quickly change to the continuous annealing equipment. is there. A technology that solves such a problem is introduced in a patent publication. For example, Japanese Patent Application Laid-Open No. 177965/1982 discloses that, by disposing one transverse shear at each of the outlet of the furnace part and the inlet of the outlet steel strip storage part, the plating process to the annealing process and vice versa. It introduces a continuous sheet processing facility that cuts the steel strip at the end of the furnace section and the start of the outlet steel strip storage section without interruption during the transition to the process.

[0003] Such continuous processing equipment has the advantage of being economical and economical to operate as a multipurpose equipment, but on the other hand, the problem of having to repeat cutting and welding of steel strip in actual operation. was there. Further, Japanese Patent Application Laid-Open No. 63-293149 also discloses, "By combining a sink roll immersed in a hot dip bath so that it can move in and out, a combined production of a cold rolled steel plate and a hot dip steel plate for changing a passing line of a running steel strip. Equipment ”is introduced. This manufacturing equipment eliminates the need for auxiliary equipment such as shears and welding machines of the continuous processing equipment, and shortens the time for switching the steel strip passage line when changing processes, and is non-oxidizing on the hot dip bath surface. There is an advantage that it is easy to use in a hot dip plating apparatus that is surrounded by an atmosphere cover. However, as disclosed in Japanese Patent Laid-Open No. 57-177965, it is immediately applicable to a hot dip galvanizing apparatus provided with a downward inclined snout that surrounds and guides a steel strip traveling between a heating furnace and a hot dip bath. There was a problem I could not do.

[0004]

[Means for Solving the Problems]

 Due to these problems, the present invention is aimed at hot-dip galvanizing equipment equipped with a snout, and changes the switching time of the running line of the running steel strip when switching from the continuous annealing step to the hot-dip plating step and vice versa. The purpose is to provide a shortened processing device. The gist of this is that a bendable snout is installed at the steel strip outlet end of the continuous annealing furnace so that it can pivot, and the steel strip running through the snout escapes the dipping rolls and deflector rolls immersed in the molten plating bath. This is a continuous annealing / hot dip plating treatment facility characterized by being installed as much as possible.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In FIG. 1, 1 is a continuous annealing furnace, and 2 is a turndown roll, which is provided on the outlet side of the continuous annealing furnace 1. 3 is a steel strip. 4 is a snout. The snout 4 is a passage tube of a steel strip having a flexible structure that is divided in the longitudinal direction and is pivotally provided on the outlet side of the continuous annealing furnace 1. The bent portion of the snout 4 is provided with a deflector roll 13 inside the snout that turns in the traveling direction of the steel strip 3 when the snout is bent. In addition, the snout 4 may be provided with a seal gas supply device 5 and a heat medium at appropriate positions. That is, the traveling steel strip 3 is provided so as to pass through the continuous annealing furnace 1 and the snout 4. Reference numeral 6 denotes a plating metal melting furnace in which metals such as zinc, tin, and aluminum to be plated and other alloys are melted and accommodated, and a hot dipping bath dipping roll 7 is provided therein.

The hot dip bath dipping roll 7 is provided so that the hot dip bath can be moved in and out freely. The figure shows an escape structure (dotted diagram) in which the hot dipping bath dip roll 7 is rotated 180 degrees. Reference numeral 8 is a guide roll for the steel strip 3 that exits the hot dip bath, and 9 is a wiping nozzle that wipes off the excess hot-dip metal deposited on the running steel strip 3. 10 is a deflector roll. The deflector roll 10 rolls in the traveling direction of the steel strip 3 and is provided so as to be able to escape like the roll dipping roll 7 in the hot dipping bath. Further, in the present invention, as shown in FIG. 2, the hot dipping bath dipping roll 7 and the deflector roll 10 are provided in a traveling crane type escape structure composed of a gate type frame 11 and a lifting arm 12. Good.

In the apparatus of the present invention as described above, the steel strip 3 which is annealed and runs in the continuous annealing furnace 1 is not oxidized and is subjected to hot dip plating in the plating metal melting furnace 6 from the outlet end of the continuous annealing furnace 1. After passing through the snout 4 extended in the bath, the hot dipping bath dipping and turning roll 7 is rotated, and then rises through a guide roll 8 and a wiping nozzle 9. When switching from the hot dip plating process to the continuous annealing process such as stippling, the hot dipping bath dipping roll 7 is moved to the standby position, and then the standby position is waited. After the deflector roll 10 has been moved to the steel strip passing position and installed, without cutting the steel strip 3, the snout 4 connected to the outlet end of the continuous annealing furnace 1 is bent and directed to the deflector roll 10. Pivot (rotate) to form a continuous annealing line. In each of the steps thus formed, a continuous annealing operation or a hot dipping operation is performed in accordance with a normal operation.

[0008]

[Effect of device]

 According to the present invention as described above, it is possible to easily switch from the continuous annealing step to the hot dip coating step and vice versa without cutting the steel strip.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention,

FIG. 2 is a view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Continuous Annealing Furnace 2 Turndown Roll 3 Steel Strip 4 Snout 5 Seal Gas Supply Device 6 Plating Metal Melting Furnace 7 Hot-dip Galvanizing Bath Immersion Roller 8 Guide Roll 9 Wiping Nozzle 10 Deflector Roll 11 Gate Frame 12 Lifting Arm 13 Snout Deflector roll

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuyoshi Okada Creator Nobuyoshi Okada 1-1 Tobahata-cho, Tobata-ku, Kitakyushu, Fukuoka Inside Nippon Steel Corporation Yawata Steel Works

Claims (1)

[Scope of utility model registration request] 1. A snout having a bendable mechanism is pivotally provided at an outlet end of a steel strip of a continuous annealing furnace, and escapes a dip roll and a deflector roll of a steel strip which runs through the snout and is immersed in a molten plating bath. A continuous annealing / hot dip plating treatment facility characterized by being movably installed.