JPS5939510B2 - Wire automatic pickling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the descaling process of coiled wire rods supplied to a continuous wire annealing furnace, for example, and is particularly aimed at preventing rust that occurs frequently when the process is automated and streamlining the process. This invention relates to a pickling device for wire rods.

Conventionally, wire rods etc. that are supplied to secondary processing or continuous annealing furnaces are bundled into coils, and in order to remove smuts, scales, etc. that have adhered to the surface of the wire rods before being supplied to the annealing furnace.
After being immersed in an acid tank for pickling, descaling was performed using high-pressure spray water, and immediately thereafter, the material was immersed in a water washing tank to remove the acid.

However, such manual descaling work has many safety and health problems, and automatic descalers as described below have been developed. As shown in Figures 1 and 2, a wire coil 3 is suspended and placed on a hook 2 attached to a pedestal 1 carried by a hoist or the like, and the inner and outer periphery of the coil 3 is descaled. This descaling device is designed to reciprocate in the axial direction of the coil by a cart 6 provided with an outer ring-shaped nozzle 4 and an inner circumferential nozzle 5 so that high-pressure spray water can be evenly applied. T is provided at the same height as the acid tank 8 and the like in the previous process.

Therefore, such a device is quite effective in removing scale, smut, etc., but the process from descaling to completion of dipping is (
B) Descaling (B) Lifting the hook ←,) Lateral transport to the aquarium (Holding horizontally) L) Lowering the hook into the aquarium (E) Cleaning the coil in the aquarium (F) Removing the hook from the aquarium Since it takes more time to lift the product, transport it laterally from the water tank to the post-processing part, and lower the hook in the post-processing part, rust develops during this time.

Therefore, if rust is a concern, the steps of pickling, descaling, pickling, water washing, and post-treatment are carried out, and after descaling, the product is immersed in acid again to remove the rust generated during descaling.
However, immersing the coil twice in acid is not only uneconomical because the amount of acid taken out of the coil and the amount consumed doubles, but also the amount of acid used for water treatment increases due to the increase in the amount of acid brought into the washing water and the like. Furthermore, when the pickling process is automated, its control becomes complicated. The amount of rust as described above is particularly significant when automatic operation is performed by an automatic conveyance device due to restrictions on operating time. Therefore, the present inventor conducted various investigations regarding the occurrence of rust, and found that even if the coil after pickling is pulled out of the acid solution and left in the air, harmful rust does not develop slowly.

2. After pickling, the surface of the coil is covered with a water film, such as during descaling, or when it is immersed in water, rust will develop slowly.

3. After pickling, the coil quickly rusts when its surface is wet.

It has been found.

From the above points, during the above process, (gu), (c)), (d),
(f), (卜), (f? It is understood that the steps are the main causes of rust. Therefore, the purpose of the present invention is to omit or improve the above-mentioned steps that cause rust, and to improve the process after pickling. To this end, the descaling device is installed at a level that allows the coil to be held horizontally, and the coil can be moved horizontally to the next process without moving up or down before and after descaling is completed. In addition to this, the descaling device is equipped with a shower device separate from the spray water for descaling to cover the coil with a film of water until immediately before post-processing, thereby preventing the formation of harmful rust. It is something.

Next, embodiments embodying the present invention will be described in detail with reference to the accompanying drawings starting from FIG.

Here, FIG. 3 is a layout diagram of the entire pickling device which is an embodiment of the present invention, FIGS. 4 and 5 are front and side views of the descaling device, and FIG. 6 is a diagram showing the crane device and shower unit. FIG. 7, a front view of the descaling device including the device, is a view taken along arrow A in FIG. 6. In FIG. 3, reference numeral 10 denotes a loop-shaped rail that forms the running track of the circulating crane, and includes a coil supply section 11, an acid tank section 12, and a descaling section 13 arranged on the ground.
, a hot water tank 14, a bonderite tank 15, a hot water tank 16, and a loop returning to the extraction section 20 through the heads of each of the percolene, rejube, and lime tanks 17, 18, and 19.

Then, the rail leaving the acid tank section 12 is descaled at the descale section 13.
It bends 0 degrees and reaches the upper part of the bonderite tank 15. A portion 21 of the descaling section 13 that protrudes from the rail 10 is a place where the descaling device 22 retreats so as not to obstruct passage of the coil. The crane 23 is suspended from the rail 10 and travels in the direction of the arrow 24 as shown in FIG.
The open end 26 of the wire rod 5 protrudes rearward with respect to the traveling direction 24 of the crane, and is used to lift and transport the wire rod coil 3. During transport, the open end 26 of the wire rod 3 is opened through a narrow opening 28 provided at the top of the passage cover 27. pass. The descaling device 22 is
It is housed in a cover 29 that covers the descaling part 13, and reciprocates from a position 22a to a position 22b on a rail 30 laid within the cover 29, as shown in FIGS. 4 and 5.

The position 22a is the above-mentioned retreat position, and the descaling operation is normally performed at the position 22 shown by the solid line.

The descaling device 22 is a coil 3 hung on a hook 25.
Outer nozzle groups 32, 32, . It is composed of inner nozzles 33, 33 that spray high-pressure spray water 31 toward the other side, and a support frame 34 that also serves as a support for these nozzles and piping. 35 is a flexible pipe for distributing water pumped up from the circulating water tank 36 to the support frame 34.

On the inside of the cover 29 housing the descaling device 22, water nozzles 37 and 37 are provided which spray shower water in addition to the high-pressure spray water onto the outer peripheral surface of the coil during or after descaling. 38 is hook 25
This is a nozzle for spraying cleaning water onto the neck portion 39 of.

Loading and unloading of coils is performed using a conveyor and a trolley.

After the coils are loaded onto a pallet, a so-called coil mount, using an overhead lane, the coils are automatically placed on the hook 25 of the crane 23 using a pallet truck, and the process proceeds to the pickling process.
When the pickling process is completed, the crane 23 returns to the position where the coil was placed, unloads the coil onto the pallet from the hook 25 in the reverse operation of loading, and returns the pallet to its original position using a truck. Here, coils are extracted depending on the lane that runs overhead. The operation of the crane 23 is controlled according to instructions from a computer, and the computer has information about the crane's travel time,
The hoisting time, the unwinding time, and the immersion time in each processing tank are stored, and it is responsible for switching each speed between low speed and high speed, and changing the immersion time in each tank. A device for vibrating the hook 25 is installed in the crane to facilitate the penetration of acid for pickling, so that the coil sent from the rolling mill can be pickled without cutting the binding wire. By giving directionality to this vibration, the coil is vibrated and rotated, thereby eliminating uneven pickling. Furthermore, during the pickling process, when lifting the coils above all the tanks, the lifting operation is performed intermittently to speed up and ensure the removal of liquid and reduce the amount of acid etc. carried out. The coil that has been pickled is hung from the hook 25 and placed on the rail 1.
0, the rail bending section 1 of the descaling section 13
It stopped briefly in front of 3゛.

Then, the descaling device 22 advances from the evacuation location 21 and descales the coil by spraying high-pressure spray water onto the coil. During or at the same time as this descaling operation is completed, the shower device 37 is operated to remove acid from the coil and cover the coil surface with a film of water to prevent rusting. This spraying of shower water is continued until just before the coil is transferred to the Bonderite bath for post-treatment. When the coil is transferred to the post-treatment tank in this manner, the descaling device 22 also retreats to the retraction section 21 and does not obstruct the passage of the next crane. In addition, the descaling device should be placed at the same position as the hanging height of the coil.
That is, since it is set at the height of the horizontal holding function, there is no need to move the coil in the vertical direction in this part, and the process is omitted accordingly, further enhancing the effect of suppressing rust. Additionally, the opening of the hook was made to face backwards relative to the direction in which the hook was moving so that the nozzle of the descaling device could easily enter the opening, and the reason why the descaling device was provided at the bent part of the rail was to make it easier for the nozzle of the descaling device to enter. In addition to making it easier to find a place to evacuate, the distance between the descaling section and the post-processing tank is reduced to shorten the time the coil is held horizontally during this time.
This is to prevent rusting. Furthermore, a door or the like is opened between the descaling section and the acid tank section or the post-treatment tank section as necessary to prevent water for descaling from entering other tanks. As described above, the present invention provides a wire rod pickling device that sprays high-pressure spray water on the inner and outer surfaces of a pickled coiled wire rod to descale and then performs post-treatment, in which the high-pressure spray device is connected to an acid bath section and a post-treatment device. A shower device is installed around the high-pressure spray device to inject water over the entire outer circumference of the coil, and a shower device is installed between the high-pressure spray device and the coil at a height that allows the coil to be carried horizontally. A circulating crane is installed, and the pickling, descaling, showering, burning, and post-processing are performed automatically and continuously while the coil is suspended from a hook attached to the crane. The process time from pickling to post-treatment is shortened, and the coil after descaling is covered with a protective film of water, which prevents harmful rust from forming during this time, and is also good for the amount of acid taken out and the quality of the washing water. It is particularly effective in preventing rust in automatic driving.

[Brief explanation of the drawing]

1 and 2 are a front view and a side view of a conventional descaling device, FIG. 3 is a layout diagram of the entire pickling device which is an embodiment of the present invention, and FIGS. 4 and 5 are: A front view and a side view of the descaling device, FIG. 6 is a front view of the descaling device including a crane device and a shower device, and FIG. 7 is a view taken in the direction of arrow A in FIG. 6.

Claims (1)

[Scope of Claims] 1. In a pickling device for wire rods, which performs post-treatment after spraying high-pressure spray water on the inner and outer surfaces of pickled coiled wire rods to descale them, the high-pressure spray device is connected to an acid bath section and a post-treatment section. A shower device is installed around the high-pressure spray device to spray water over the entire outer periphery of the coil, and a crane circulates along a rail installed above the device. 1. An automatic wire rod pickling device characterized in that pickling, descaling, shower cleaning, and post-processing are automatically and continuously carried out while the coil is suspended from a hook provided on the crane. 2. The pickling device according to claim 1, wherein the rail is bent at 90 degrees or more between the acid tank section and the post-treatment section, and the descaling section is provided at the bending section. 3. The pickling device according to claim 1, wherein the hook is opened rearward with respect to its traveling direction. 4. The pickling device according to claim 1 or 2, wherein the descaling device is configured to be retractable to the outside of the bent portion.