JPS5952960B2 - Immersion type continuous pickling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pickling apparatus for continuously pickling rolled strips (hereinafter referred to as strips), and particularly to a continuous immersion pickling apparatus.

Conventionally, in this type of pickling equipment, as shown in Figure 5, the transfer strip is dipped under its own weight into the acid solution stored in the pickling tank, and the oxidized scale on the surface of the list strip is removed by the chemical reaction of the acid solution. It is being removed.

In this pickling equipment, the acid solution is heated to accelerate the reaction rate and shorten the pickling time. A so-called boundary layer is formed, which makes it difficult to obtain a pickling speed (pickling effect) that matches the strip transfer speed. Internal distillation time is ensured to achieve the desired pickling rate.

(See Figures 5a and 5b) This has the disadvantage that the pickling equipment becomes long and very expensive.

The present invention has been made to eliminate the above-mentioned drawbacks.
The strip immersed in the acid solution is transported in a fixed position along the length of the pickling tank by a strip guide device, and agitators placed opposite each other are forced to reciprocate on both sides of the strip. The object of the present invention is to provide a continuous immersion pickling device that can improve the pickling speed by destroying the boundary layer between the pickling material and the acid solution.

Hereinafter, the embodiment will be described with reference to the drawings. In the drawing, 1 is a pickling tank, and 2 is an acid solution stored in the pickling tank 1. 3 shows the strip to be pickled.

4a and 4b are strip guide wheel devices installed at both ends of the pickling tank 1, and part of the outer periphery of the guide wheels 4a' and 4b' of both guide ring devices is located in the acid solution, and both guide wheels 4a', 4
The structure is such that the strip 3' guided by b' moves approximately horizontally in the acid solution.

Reference numerals 5 and 5' denote stirring protrusions disposed close to both the upper and lower surfaces of the strip 3' between the guide wheels 4a' and 4b', and the protrusions 5 and 5' are movable frames that can freely reciprocate in the transverse direction of the strip 3'. It protrudes from 6.

7 is a flanged roller that supports the movable frame 6, and 8 is a drive device.

Incidentally, it is preferable that the frame on which the lower protrusion 5' is protruded is a frame-like frame to prevent the accumulation of peeled scale.

The present invention is configured as described above.

Next, the movement path of the strip and the pickling action will be described.

The strip 3 is attached to the inlet strip guide wheel 4a' of the pickling tank 1.
is introduced into the acid solution 2, and then both strip guide wheels 4
Stirring protrusions 5, 5' formed by dipping between a' and 4b'
After passing through the pickling tank 1, the pickling tank 1 is led out of the tank by the outlet guide wheel device 4b. The oxidized scale on the surface of the strip 3 is gradually peeled off and removed by the chemical action of the acid solution during movement in the acid solution, but especially when passing between the stirring protrusions 5 and 5'', the oxidized scale on the surface of the strip 3'' and the tips of the stirring protrusions 5 and 5'' are separated. The gap between both guide wheels 4a'' and 4b is
The acid solution covering the surface of the strip is constantly maintained at a constant small gap by the guiding action of the strip, and the acid solution covering the surface of the strip is disturbed and well stirred by the stirring protrusions 5, 5" that reciprocate in the transverse direction of the strip. Ru.

For this reason, the boundary layer that occurs between the strip surface and the acid solution (the layer of acid solution that moves alongside the strip as the strip moves through the acid solution) is completely destroyed and diffused. The strip 3'' is always in contact with fresh acid solution, and the scale removal action is effectively performed.In the above embodiment, the stirring protrusion 2 is reciprocated in the transverse direction of the strip, but it is also reciprocated in the longitudinal direction of the strip. Alternatively, the protruding position of the stirring protrusion may be perpendicular to the direction of reciprocating motion, or it may be inclined as shown in Fig. 4 to disturb the acid solution on the surface of the strip and promote its flow. As described above, according to the present invention, the pickling of the strip can be carried out extremely effectively, so that the pickling apparatus can be downsized, which is extremely effective in reducing equipment costs and equipment installation area.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of the immersion type continuous pickling device according to the present invention;
2 is a side sectional view taken along line 11 in FIG. 1, FIG. 3 is an enlarged perspective view of section A in FIG. A and b are explanatory diagrams showing a conventional example. 1... Pickling tank, 3, 3''... Strip, 4a'', 4b''... Strip guide wheel (strip guide device), 5, 5''... ... Stirring protrusion (
stirring body), 6... movable frame.

Claims (1)

[Claims] 1. A strip guiding device that moves the strip in a substantially constant state along the length of the pickling tank and an agitating body supported by a reciprocating movable frame and disposed facing each other on both sides of the immersed strip are provided in the processing solution. Features: Immersion type continuous pickling equipment.