JPS63317685A - Rotary pickling device - Google Patents

Abstract

PURPOSE:To control the consumption of a pickling soln. and generation of a waste liq. with the title compact device by rotating a work, and spraying a pickling soln. and washing water from the same spraying device by the switching over of a valve. CONSTITUTION:The work W is placed on a turntable 1, and rotated. A pickling soln. injection automatic valve 11 is opened, and the pickling soln. in a pickling soln. tank 4 is injected on the work W from an injection pie 10a and the injection nozzle 15 of a lid body. the falling pickling soln. is introduced into a distributor 17 from a groove 2 under the edge of the turntable 1, and recovered in the pickling soln. tank 4. The valve 11 is closed, an air-supply solenoid valve 13 is opened to supply compressed air to the injection pipe and nozzle 10a and 15, hence the remaining pickling soln. is discharged onto the turntable 1, and the soln. is recovered in the picking soln. tank 4 through the distributor 17. The valve 13 is closed, a water-supply automatic valve 12 is opened to inject water in a water tank 5 in the same way as the pickling soln. and the water is recovered in the water tank 5 through the distributor 17. In addition, the neutralizing soln. in a neutralizing soln. tank 6 is supplied to the water tank 5, and the acid component in water is neutralized. Compressed air is then supplied to the injection pipe and nozzle 10a and 15, and the pipe and nozzle are dried.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is a rotary pickling method for removing an oxide film, that is, scale (commonly known as black scale) generated on a metal surface during metal heat treatment. It is related to the device.

〈Conventional technology〉 (Fig. 3) Brewing is generally carried out using pickling (ACID PICKLING) acid treatment.
(ACI mouth TREATING) Washing resistant (AC
ID CLEANING), but the present invention is classified into three types of acid treatment (ACID TREATIN) among the above.
G) Concerning improvements in equipment.

Conventionally, acid treatment has been carried out to remove scale from the surface of metals that have been treated for eight hours.

This model prepares a solution such as hydrochloric acid, sulfuric acid, nitric acid, or phosphoric acid in pickling tank A, immerses the metal M that requires acid treatment, and removes the oxide film on the metal surface. The metal M was immersed in a neutralizing solution prepared in a neutralizing tank B, and then the metal M taken out from the neutralizing tank B was washed C and dried.

A conceptual diagram of this type is shown in FIG. 3, and as is clear from the drawing, the tops of both the pickling tank A and the neutralization tank B are open in order to soak the objects to be treated in a so-called drain.

This type of device with two open parts is not limited to the illustrated example, but is also applicable to continuous pickling equipment in strip factories, for example, where processing is carried out continuously.

<Problems to be solved by the invention> The problems of the above-mentioned immersion pickling method are: ■ Pickling tank A
, since the volume of the neutralization tank B needs to be large, the installation of equipment becomes excessive.

-(2) A large amount of acid and neutralizing liquid are required for treatment.

I) Since large amounts of acids and neutralizing liquids are used, large amounts of these waste liquids are also generated, and it requires a great deal of expense to make them ready for disposal.

■ Since the top of the pickling tank A has to be opened, it is impossible to prevent the acid odor from leaking to the outside.

(2) Since the pickling tank A and the neutralization tank B have a capacity that can completely accommodate the metal M to be treated, it is often impossible to pickle large objects.

■ The process of repeating immersion in an acid, taking it out, inserting it into a neutralizing solution, taking it out, washing it with water, and drying cannot be accomplished without the premise of a large expenditure of labor and time.

The present invention eliminates these problems, minimizes the consumption of acids and neutralizing liquids and the generation of their waste liquids, and simplifies the entire pickling process when necessary. Its purpose is to provide equipment that can be automated.

Means for Solving the Problems In order to solve the above problems, it is necessary to minimize the consumption of acid and neutralizing liquid and the volume of the entire device.

Therefore, the conventional method of doubling is not adopted, but the acid and neutralizing liquid are applied to the workpiece by spraying.

In addition, if the workpiece W is stationary, the action of the acid and neutralizing liquid will be uneven, so one of the workpiece W or the acid and neutralizing liquid spraying device should be rotated relative to the other. By doing so, the action of the acid and the neutralizing liquid is uniformly applied to the workpiece W. What is required for this is to rotate the workpiece W while it is suspended, or
Alternatively, it is a means for placing the workpiece W on the turntable 1 and rotating it.

In order to carry out these operations while shielded from the outside, it is sufficient to cover the entire area in a liquid-tight manner with a material that is resistant to acid attack, such as synthetic resin, which prevents the acid and neutralizing liquid from scattering to the outside. It is possible to prevent this and also to prevent internal odors from leaking to the outside.

Furthermore, by switching the valves, the acid, neutralizing liquid, and cleaning water can be sprayed from the same spraying device onto the workpiece W, thereby making it possible to simplify the structure of the device.
At the same time, it can be easily automated.

<Example> (Figures 1 and 2) Specific embodiments of the present invention will be described with reference to the drawings.

Among the embodiments according to the present invention, the illustrated example is of a type in which the workpiece is rotated on a turntable 1,
The turntable 1 has a circular planar shape, with a center portion 1a slightly higher and an edge portion 1b slightly lower.
When the rootstock IC is placed a, the rootstock IC is placed a to help the acid solution or neutralizing solution quickly reach the edge 1b.
It has been ffl. A gutter 2 is installed in a circumferential manner below the edge 1b.

The outer edge 2a of the gutter 2 rises upward to form a tank body 2b made of a material that is not susceptible to corrosion by acids, such as vinyl chloride.

3 is a tank body 2b for closing the upper opening part of the tank body.
The lid body is folded by a suitable means 3a.

Next, 4 indicates an acid liquid tank, 5 a water tank, and 6 a neutralization stock solution tank. The acid liquid tank 4 contains an appropriate acid mixture or aqueous solution of a single acid necessary for pickling. The water tank 5 contains water, and the neutralization stock solution tank 6 contains a neutralization stock solution necessary for neutralization work.

The acid liquid in the acid liquid tank 4 is fed by the installed acid liquid pump 7, and is supplied to the injection nozzle 10 attached to the injection pipe 10a installed inside the tank main body 2b. The supply of acid liquid is controlled by an automatic acid liquid injection valve 11.

Water in the water tank 5 is fed by a water supply pump 8, and water or central liquid is supplied to the injection nozzle 10. The supply of these liquids is controlled by an automatic water supply injection valve 12.

The neutralized stock solution in the neutralization stock solution tank 6 has a PH value attached to the water tank 5.
It is pumped up by a neutralized stock solution pump 9 whose opening and closing are controlled by a detector 5a, and is fed to the water tank 5.

The injection pipe 10a is further provided with an air supply solenoid valve 13, which supplies air to the injection pipe 10a as needed.
Pressurized air can be ejected from the injection nozzle 10.

14 is a pipe branched from the injection pipe 10a, and is connected to the tank body 2b.
It is connected to a lid injection pipe 15a installed below the internal lid 3, and the liquid or air branched from the injection pipe 10a is sent to the lid injection nozzle 1 of the lid injection pipe 15a.
Make it squirt from 5.

The gutter 2 is provided with an outlet 16, and a distribution device 17 installed below the outlet 16 is driven by a control motor 18, and the liquid flowing down from the outlet 16 is
Distribution is performed to feed the acid liquid to the acid liquid tank 4 or the water tank 5.

The acid liquid tank 4 is equipped with a heating device 4a for maintaining the internal acid liquid at an appropriate temperature. Water tank 5,
A supply means P for supplying insufficient liquid, an overflow pipe Q, and a waste liquid pipe R are installed in the neutralization stock solution tank 6, respectively.

Further, the turntable 1 is rotated by a drive motor 20 via a reduction gear ja19.

To explain the operation, the object W to be processed is placed on the rootstock 1C, and the turntable l is rotated by the drive motor 20. This rotation continues during all steps of pickling, neutralization washing, and drying.

In the pickling process, the acid liquid pump 7 is started, the acid liquid injection automatic valve 11 is opened, the acid liquid in the acid liquid tank 4 is supplied to the injection pipes 10a and 15a, and the acid liquid is supplied to the injection nozzle 10 and the lid. This is carried out by injecting acid liquid from the body injection nozzle 15.

The injected acid solution comes into contact with the workpiece W, flows down its surface, reaches the turntable 1, flows from there into the gutter 2, and flows into the distribution device 17 from the outlet 16. The sorting device 17 in this case is fixed at a position where it can feed the inflowing acid solution to the acid solution tank 4.

To stop pickling after a suitable working time has passed, stop the acid solution pump 7 and close the automatic acid injection valve 11 to stop the acid solution supply, and then open the air supply solenoid valve 13 to stop the acid washing. Pressurized air is supplied to the injection pipes 10a and 15a, and all remaining acid liquid is discharged onto the turntable 1 by the air pressure, and then transferred to the outlet 16, the distribution W! 117 and is collected in the acid liquid tank 4.

In the neutralization water washing step, the air supply solenoid valve 13 is closed, the opening position of the distribution device 117 is directed toward the water tank 5 by the control motor 18, the water supply pump 8 is driven, and the automatic water injection valve 12 is opened. This is carried out by supplying water in the water tank 5 to the injection pipes 10a and 15a and injecting water from the injection nozzles 10 and 15.

Similar to the above-mentioned sprayed acid solution, the sprayed water also comes into contact with the workpiece, flows down its surface, reaches the turntable l, passes through the gutter 2, the outlet 16, and the distribution device 17, and then enters the water tank. 5
will be collected.

At the start of neutralizing water washing, a large amount of the remaining acid components are dissolved, so the pH value of the water collected in the water tank 5 shows high acidity, so the PH detector 5a attached to the water tank 5 This fact is detected, and the neutralization stock solution pump 9 is driven to supply the neutralization stock solution in the neutralization stock solution tank 6 into the water l (!5). Continued until the resistant components are completely neutralized!

To stop the neutralization washing process, stop the water supply pump 8, close the automatic water injection valve 12,
Next, the air supply solenoid valve 13 is opened and all remaining neutralizing liquid is collected into the water tank 5.

The drying process is carried out by continuing to supply pressurized air to the injection nozzles 10 and 15 from the air supply solenoid valve following the termination of the neutralization washing process.

After the drying process is completed, all operations are completed by closing the air supply solenoid valve 13 to stop the supply of pressurized air, opening the lid 3 and taking out the workpiece W from the tank body.

Description of Other Embodiments When the workpiece W has a cylindrical shape with a bottom, a third injection nozzle N protruding from the turntable l is inserted into it, and the injection pipe 10a is By further branching S and connecting it to a third injection nozzle N, it is possible to process the inside of the cylinder.

Further, it is also possible to suspend the workpiece W from a rotation shaft penetrating the lid body 3 and hanging down inside the tank body for pickling. In this case, the operation can be performed in exactly the same manner as described above, except that the turntable l is not used.

<Effects of the Invention> According to the present invention, pickling, neutralizing water washing, and drying can be performed in a single tank body, so the installation area of the apparatus can be significantly reduced.

In addition, since the liquid used is sprayed from a nozzle and applied to the workpiece, it is sufficient to cover that part of the tank body to prevent the spray from leaking to the outside, so the conventional drain dipping method is As such, there is no need for a robust tank to withstand the weight of the liquid contained therein, so lightweight and inexpensive materials can be selected for manufacturing the tank body.

Furthermore, since the liquid is applied by spraying, only a small amount of liquid is needed, and therefore the amount of waste liquid generated is small, and waste liquid treatment can be kept to a minimum.

In addition, since the device is operated only by operating each motor and switching the automatic valves, the device is easy to operate and does not require human labor, and can be easily automated if necessary.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram of the apparatus of the present invention, FIG. 2 is a conceptual diagram of the essential parts of the apparatus of the present invention, and FIG. 3 is a conceptual diagram of a conventional system. 1... Turntable, 2... Gutter, 3... Lid, 4...
Pickling tank, 5...water tank, 6@-neutralization stock solution tank. 711 φ acid liquid pump, 8... Water supply pump, 9... Neutralization stock solution pump, 1O... Injection nozzle, 11 φ Automatic acid liquid injection valve, 12... Water supply injection automatic valve, 13 φ Air supply solenoid valve, 14・・Pipe line, 15・φ lid injection nozzle, 16・・Outlet, 17・φ distribution device, 18・・Control motor, 19・
・Reduction gear, 20... Drive motor. Xun

Claims (1)

[Scope of Claims] A tank main body, an injection means comprising an injection pipe equipped with an injection nozzle for injecting liquid and air into the tank main body, means for rotating a workpiece inside the tank main body, and a bottom part of the tank main body. means for recovering the liquid injected by the injection means, means for supplying pressurized air, means for supplying pressurized acid solution, and means for supplying pressurized water; A means for supplying a neutralized undiluted solution as necessary to a means for supplying water, and a means for collecting the injected liquid at the bottom of the tank main body. A rotary pickling device comprising means for distributing and feeding pressurized acid solution or pressurized water to a means for supplying pressurized water.