JP2590152B2 - Continuous melting plating and annealing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a continuous melting plating facility and a continuous annealing facility, and more particularly to a facility that combines both facilities.

[Conventional technology]

FIG. 8 shows a typical example of a conventional continuous melting plating system. Unwinder 1, Welder 2, Inlet looper 4, Annealing furnace 5, Snout 6,
The equipment includes a melting pot 7, a skin pass mill 8, a tension leveler 9, an outlet looper 10, a shear 11, a winder 12, and the like.

When the cold rolled material is zinc plated, the annealing temperature in the annealing furnace 5
After heating to 700-850 ° C, it is cooled to about 460 ° C and melted. That is, apart from the processing capacity, the annealing furnace 5 itself is similar to that of the continuous annealing equipment. In recent years, the continuous melting plating equipment has greatly improved the plating processing capacity, and the annealing furnace has also been required to have a considerable processing capacity.
It has become a large-scale facility, which is no different from equipment dedicated to annealing. In recent years, market demands are small and multi-product, and in order to meet the needs of the market, it has become indispensable to use multi-purpose equipment and improve the operation rate of equipment. . Therefore, if a facility capable of performing not only melting and annealing but also annealing can be constructed, a great effect can be obtained. However, since the operation must always be performed at a high temperature, if the switching of the equipment takes a long time, the strip will break due to creep, and it is necessary to switch the equipment within a time during which no creep occurs. If the furnace temperature is lowered, the switching time can be extended, but a large amount of energy is required for raising the temperature after the switching, which is against energy saving. Therefore, it is essential that the equipment can be switched within the time that does not cause creep rupture,
No conventional equipment has made this possible.

Regarding the continuous melting plating equipment, to replace the equipment in a short time due to the consumption of the plating equipment,
There are JP-A-47-21340 and JP-A-55-148753, but this does not change the purpose of the equipment itself.

[Problems to be solved by the invention]

In the above-mentioned conventional equipment, it is impossible to switch from the plating equipment to the annealing equipment at all within the allowable time, and it is not possible to make a multipurpose equipment, which is a recent market need.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a continuous hot-dip galvanizing and annealing facility that can safely and quickly switch from a plating facility to an annealing facility within an allowable time so that the strip does not creep.

[Means for solving the problem]

The above object is to provide a continuous hot-dip plating and annealing equipment, which includes an annealing furnace and a nozzle header which can be carried out of the line from a melting pot and which has an injection nozzle for wiping excess plating film of the molten metal. Each component of the apparatus and a teflector roller for annealing installed on the melting pot so that the strip can change its direction without entering the melting pot in a state where the components of the plating apparatus are removed from the melting pot. Further, the present invention is achieved by having a snout capable of expanding and contracting the length and tilting the installation angle so that the annealing deflector roller can be installed.

Further, the melting pot is a pot provided with a nozzle header elevator unit of a plating device, and if a plurality of pots having a mechanism for raising / lowering and traversing the pot itself are provided, it becomes a facility capable of plating a plurality of plating metals.

Furthermore, during the path switching operation, a path switching leader strip is interposed in the annealing furnace to minimize product strips that become scraps.

[Action]

A dedicated path switching crane configured to be able to lift and lower the plating device and the deflector roller for the annealing pass while avoiding snout and stripping can safely and quickly replace the plating device and the deflector roller for the annealing pass. In addition, the snout which expands and contracts and tilts does not hinder replacement work by the crane.

Also, a plurality of pots each having a nozzle head elevator unit enables simultaneous metal plating.

Further, since the path switching leader strip is interposed in the annealing furnace during the switching operation, the portion that becomes the scrap of the product strip is minimized.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

A detailed description of the features of the present invention will be described with reference to FIGS.

The same apparatus as that described in Japanese Patent Application Laid-Open No. 55-144873 is used.

Nozzle header 15 equipped with an injection nozzle for wiping excess coating film of molten metal, opening / closing unit 16 of nozzle header 15, elevator unit 17 of nozzle header 15, melting pot 7 supporting elevator unit 17, sink roller 18, sink roller support FIGS. 1 to 3 show a mounting device including a frame 19, a wiping roller 20, a wiping roller driving device 21, and a wiping roller driving spindle 22 as main components.

Nozzle header 15, Nozzle header opening / closing unit 16, Sink roll support frame 19, Wiping roll drive spindle 22
Are lifted out of the snout 6 and the strip 3 and taken out by a dedicated path switching crane 14 which is carried out of the line. 23 is a crane dedicated to path switching
It is a stand that supports 14. That is, the state of FIG. 1 changes from the state of FIG. 2 to the state of FIG. 2, and each part of the plating apparatus carried out of the line is placed on the plating apparatus exchange cart 24 and moved to a place where the overhead crane of the building can be used. (The plating equipment section has a strip cooling zone up to the ceiling of the building, so an overhead crane cannot be used.) As shown in FIG. 3, the path switching dedicated crane 14 has an overhang portion 25 for avoiding the snout 6 and a slit portion 26 for avoiding the strip 3, and the hoists 27 provided on both sides of the slit portion 26 are used. The components of the mounting device can be lifted and lowered at the center of the line.

With such a configuration, each part of the plating apparatus can be safely and quickly carried out of the line by the path switching dedicated crane 14 without cutting the strip 3.

FIGS. 4 to 6 show a deflector roller 28 for an annealing pass which is installed at a place where the plating device is removed so that the strip 3 can change its direction without entering the melting pot 7. FIG.
FIG. It is carried from outside the line by the path switching crane 14 and installed on the melting pot 7. At this time, the angle and length of the snout 6 are changed from FIG. 2 to FIG. 5, and the deflector roller 28 for the annealing pass is changed.
Forms a space where it can be installed.

With this configuration, it is possible to switch from the plating facility to the annealing facility safely and within an allowable time.

The time during which the strip does not cause creep rupture due to heat in the annealing furnace is said to be about 3.5 hours, but with the above configuration, switching can be performed safely and quickly within this time. I can do it.

However, at this time, the product strip 3 in the annealing furnace 5
Is heated for more than a predetermined annealing time cycle,
It cannot be a finished product, but becomes a scrap. This will greatly reduce the yield. In order to minimize this, equipment switching is performed such that a path switching leader strip 15 is interposed between the points A and B in FIG. At the point where the tip of the leader strip is stopped at the point B, switching from the plating equipment to the annealing equipment is performed, so that it is not melted, so that it can be reused. The metal re-melts and adheres to the rollers in the annealing furnace, causing problems.)

The embodiment of the present invention has been described above. However, as shown in FIG. 7, the nozzle head elevator 17 is provided with two melting pots, and a pot carriage for raising and lowering and traversing the melting pot 7.
If 29 is configured, two types of molten metal can be used, so that it is possible to take measures against small quantities and many types of products required by the market.

〔The invention's effect〕

According to the continuous hot-dip plating and annealing equipment of the present invention, so that the strip does not creep rupture, within an allowable time,
The effect is that switching from the plating equipment to the annealing equipment can be performed safely and quickly.

[Brief description of the drawings]

1 is a front view of one embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a plan view of FIG. 1, FIG. 4 is a front view, FIG. 4 is a side view of FIG. 4, FIG. 6 is a plan view of FIG. 4, FIG. 7 is a front view showing an application example of the present invention, and FIG. 8 is a conventional path diagram. 3 ... strip, 5 ... annealing furnace, 6 ... snout, 7
…… Melting pot, 13… Mechanical equipment, 14… Cranes exclusively for path switching, 15… Leader strip, 17… Nozzle header elevator unit.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-41362 (JP, A) JP-A-55-6469 (JP, A) JP-A-1-87151 (JP, U) JP-A-56-151 119468 (JP, U) Shokai Sho 56-119466 (JP, U) JP-B 51-12574 (JP, B1)

Claims (5)

(57) [Claims] 1. A plating apparatus, comprising: an annealing furnace, a nozzle header capable of being carried out of the line from a melting pot, and having a spray nozzle for spraying an excess plating film of a molten metal; A deflector roller for annealing installed on the melting pot so that the strip can change its direction without entering the melting pot in a state where each part is removed from the melting pot, further comprising a deflector roller for annealing. A continuous hot-dip plating and annealing facility characterized by having a snout capable of expanding and contracting the length and tilting the installation angle so that it can be installed. 2. A continuous hot-dip plating and annealing facility according to claim 1, wherein a plurality of said molten pots are installed, and said nozzle header is moved up and down by said plurality of installed molten pots. A continuous hot-dip plating and annealing facility comprising a header raising / lowering means and a means for raising / lowering and traversing the molten pot. 3. The continuous hot-dip plating and annealing equipment according to claim 1, wherein a path switching leader strip is interposed in the furnace of the annealing furnace during a path switching operation. Continuous hot-dip plating and annealing equipment. 4. The continuous hot-dip plating and annealing equipment according to claim 3, wherein the leading end of the switching leader strip is stopped immediately before each component of the plating apparatus. Plating and annealing equipment. 5. The continuous hot-dip plating and annealing equipment according to claim 3, wherein the switching leader strip is welded and cut to a product strip in the equipment, and is reused. Continuous hot-dip plating and annealing equipment.