JPH0745565Y2 - Surface treatment line tank drip-proof device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing the surface of a material to be treated from being contaminated by a drop or the like in a line tank constituting a continuous surface treatment line for steel strips and the like.

[0002]

2. Description of the Related Art In recent years, the demand for surface-treated steel sheets such as electroplated steel sheets and hot-dip galvanized steel sheets, which have excellent corrosion resistance, is rapidly increasing. However, these surface-treated steel sheets have improved corrosion resistance depending on their use. From the viewpoint, for example, chromate treatment,
A chemical conversion treatment such as a phosphate treatment is performed as a post-treatment.

Conventionally, as an example of this type of apparatus, there is a chemical conversion treatment apparatus described in JP-A-56-62967 and JP-A-61-44185. This is a method of immersing in a chemical solution in a treatment tank, and as for measures against drop in the tank, as described in JP-A No. 61-44185, the object to be treated is mainly treated before immersing in the chemical solution. This is for the untreated part of the material, and no consideration has been given to measures against drip when chemical conversion treatment is not performed.

On the other hand, as a recent chemical conversion treatment device,
The spray type is in practical use. This is, for example, after spraying a treatment liquid on the surface of the material to be treated in a post-plating chemical conversion treatment line tank by a spray nozzle, etc., after forming a thin film on the surface of the material to be treated by a squeezing roll called a Ringer roll, In the process, it is dried with a dryer or the like.

By the way, since such a chemical conversion treatment is carried out depending on the intended use, it is usual that the chemical conversion treated material and the non-treated material are appropriately switched in the same line and continuously manufactured. Therefore, the steel strip does not come into contact with the rolls, the line tank and the like in the line tank when the processing is not performed.

FIG. 3 shows a process for producing a chromate-treated steel sheet in a continuous hot-dip galvanizing line. A steel strip 1 whose mechanical properties and temperature have been adjusted in a continuous furnace has its surface through a snout 2. After being introduced into the molten zinc bath in the zinc pot 3 while being kept in the non-oxidized state and plated while circulating around the sink roll 4, the amount of zinc adhered is adjusted by the gas wiping nozzle 5. After that, the plated steel strip 1 is cooled to room temperature in the water cooling tank 6 while being air-cooled, and then the mechanical properties, flatness, etc. are adjusted by the skin pass 7, the tension leveler 8, etc. After being guided, the treatment liquid is applied to the surface of the steel strip through the inlet ringer roll 10 by means of a spray nozzle 11 or the like.

After that, the film thickness is adjusted by the outlet ringer roll 12 which is a film thickness adjusting squeeze roll, a drying process is performed by a dryer 16, and the film is sent to the next step.
The fumes of the processing liquid generated in the line tank 9 during this time are exhausted from the exhaust port 13 by means such as a draft fan.

However, in such a line tank for surface-treating a steel strip, when switching from the surface-treated material to the non-surface-treated material, the in-line tank is washed with hot water or the like. Water drops that have adhered to the ceiling, diluted treatment liquid, etc. may drop onto the upper surface of the steel strip when surface treatment is not performed, contaminating the steel strip surface, causing surface defects and reducing yield. Become.

Therefore, as a conventional measure against this, when the non-surface treated material is conveyed, after washing the inside of the treatment tank with warm water or the like, the ringer rolls on the inlet side and the outlet side are opened to separate the roll and the steel strip. In addition to the non-contact, as shown in FIG. 5, the ceiling lid 14 is opened to promote the drying in the line tank 9, the slope of the ceiling of the line tank 9 is provided, and as shown in FIG. Measures have been taken such that the partition wall 15 in the tank has a gutter structure.

[0010]

However, the above-mentioned measures are not perfect, and it is difficult to completely prevent the drop in the line tank 9.

The present invention solves the above conventional problems,
An object of the present invention is to provide a drip-proof device capable of completely preventing a drop in a surface treatment line tank.

[0012]

In order to achieve the above object, a drip-proof device for a surface treatment line tank according to the present invention is provided with squeezing rolls on the inlet side and the outlet side, and the drip-proof device conveyed between these squeezing rolls. A drip-proof device for a surface treatment line tank having a spray nozzle group for applying a treatment liquid to the front and back surfaces of the treatment material, the drip prevention material having an area capable of covering the entire treatment target material in the line tank from above. And a moving mechanism that moves the drop prevention material to cover the surface of the material conveyed in the line tank when the surface treatment is not performed, and a winding mechanism that winds the drop prevention material outside the line tank when the surface treatment is performed. In addition, if necessary, a nozzle for cleaning at least the surface of the drop preventing material and a draining roll for cleaning water are provided in the preceding stage of the winding mechanism.

[0013]

In the device of the present invention, when the surface treatment is not performed, the drop prevention material covers the upper surface of the material conveyed in the line tank, and when the surface treatment is performed, the drop prevention material is applied to the line tank. Wind up outside.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in FIGS. FIG. 1 is a schematic front view showing an embodiment of the present invention, and FIG. 2 is an explanatory view of a state in which a chain which constitutes a moving mechanism and a drop prevention member are attached.

Reference numeral 17 is a drop preventing material, for example, a resin coating of tetron fiber, a hypalon, a stainless strip, or the like which is not corroded by the processing liquid and is not damaged during cleaning. The drip prevention material has an area capable of covering the entire surface of the material in the line tank 9, and the surface of the material conveyed in the line tank when necessary, that is, when the surface treatment is not performed. Is moved so as to cover the surface of the line tank 9 and is wound up outside the line tank 9 when unnecessary.

Reference numeral 18 denotes a moving mechanism for the drop-preventing material 17, which comprises a pair of endless chains 19 and a sprocket 20.
And a forward / reverse rotation motor 21 of the endless chain 19, and as shown in FIG. 2, a tip end of the drip prevention material 17 is attached to a connecting bar 22 that connects between the pair of endless chains 19.

Reference numeral 23 is a winding mechanism for the drop-preventing material 17, which is composed of, for example, a torque motor (not shown) and a winding roll 24 connected to the torque motor. The rear end of the material 17 is attached.

That is, the drop prevention material 17 is
The moving mechanism 18 moves the tip until it reaches the position of 25 in FIG.
The winding mechanism 23 causes the tip of the drop prevention material 17 to move to 2
It can be moved to the 5'position.

Reference numeral 26 is a nozzle provided in the preceding stage of the winding mechanism 23 for cleaning the front and back surfaces of the drop prevention material 17.
In this embodiment, the surface of the drip prevention material 17 after being washed with the high-pressure washing liquid sprayed from the nozzle 26 is drained by a draining roll 27, and then dried by a dryer 28 and wound on a winding roll 24. Is shown.

It should be noted that the drip prevention material 1 into the line tank 9
When 7 is moved and inserted, endless chain 19, sprocket 20 group, entry side ringer roll 10, exit side ringer roll 1
It goes without saying that neither 2 nor the like is in contact with the steel strip 1.

[0021]

As described above, according to the present invention, when the surface-treated material is switched to the non-treated material, the drop-prevention material is inserted into the line tank to drop the non-treated material on the surface. Can be completely prevented, so that the untreated material can be prevented from being soiled. Therefore, the surface quality and yield of these non-treated materials can be improved.

[Brief description of drawings]

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

FIG. 2 is an explanatory view of a state in which a chain that constitutes a moving mechanism and a drop prevention member are attached.

FIG. 3 is a manufacturing process diagram of a lomate coated steel sheet in a continuous hot-dip galvanizing line.

FIG. 4 is a detailed view of a line tank.

FIG. 5 is a structural explanatory view of a ceiling portion of a line tank.

[Explanation of symbols]

 9 Line tank 10 Inlet ringer roll 12 Outlet ringer roll 17 Drop-prevention material 18 Moving mechanism 23 Winding mechanism 26 Nozzle 27 Draining roll

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Isono 4-53-3 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture Sumitomo Metal Industries Co., Ltd. Company Hotani

Claims (2)

[Scope of utility model registration request] 1. A drip-proof device for a surface treatment line tank comprising squeeze rolls on the inlet side and the outlet side, and a spray nozzle group for applying a treatment liquid to the front and back surfaces of a material to be treated conveyed between the squeeze rolls. In addition, a drop preventing material having an area capable of covering the entire area of the material to be processed from above in the line tank and a drop preventing material for covering the surface of the material conveyed in the line tank when the surface treatment is not performed are provided. A drip-proof device for a surface treatment line tank, comprising: a moving mechanism for moving the surface treatment line tank; and a winding mechanism for winding the drop-preventing material outside the line tank when the surface treatment is performed. 2. A protection tank for a surface treatment line tank according to claim 1, further comprising a nozzle for cleaning at least the surface of the drop preventing material and a draining roll for cleaning water, which are provided in the preceding stage of the winding mechanism. Drop device.