KR100951151B1 - Method and device for stripping wires or metal strips - Google Patents

Abstract

The present invention relates to a method for cleaning a metal wire or a metal strip, including moving the one or more metal wires or metal strips in a predetermined direction to pass through a washing tank containing a cleaning liquid. This cleaning method forms a turbulent flow of one or more wash liquors flowing across a metal wire or metal strip in a wash tub in a transverse direction with respect to the conveying direction, and each metal wire or metal strip moves through the corresponding one or more turbulent flows during the transfer process. Characterized in that. The invention also relates to an apparatus for carrying out this method.

Description

Method and apparatus for cleaning metal wires or metal strips {METHOD AND DEVICE FOR STRIPPING WIRES OR METAL STRIPS}

The present invention relates to a method for cleaning a metal wire or metal strip, and more particularly, to a method including transferring the one or more metal wires or metal strips in a predetermined direction to pass through a cleaning tank containing a cleaning liquid. The invention also relates to an apparatus for carrying out this cleaning method.

Many such methods and apparatus have already been known for a long time, and the washing liquid used in them is an acid, in particular hydrochloric acid or sulfuric acid (see eg Belgian Patent BE-A-1005217).

As a method for increasing the efficiency of washing with an acid, a method of applying a hydraulic shock in the washing tank to cause a crest on the surface in the opposite direction to the direction of transport of the metal wire is known (Ph. P. Cowie et al. , Fumeless Acid Wave Pickle, in Wire & Cable Technology International, July 2001, p. 58-59; US Patents US-A-4.950.333 and US-A-4.951.694). However, the effectiveness of this cleaning method has also proved to be unsatisfactory. This is because the power of digging decreases as the power progresses, so cleaning is rarely done regularly. Digging also spreads over the entire width of the wash bath. That is, energy is consumed where there is no object to be cleaned.

It is an object of the present invention to improve the efficiency of the method of cleaning metal wires or metal strips in a simple manner and without causing possible energy loss.

This object can be solved by a method which further comprises the following features as the method described earlier in accordance with the present invention:

Forming a turbulent flow of at least one wash liquor in the wash bath across the metal wire or metal strip in a direction transverse to the conveying direction,

Each metal wire or metal strip moves through the corresponding one or more turbulences during the transfer process.

Thus, each metal wire or metal strip passing through the cleaning bath is treated separately, and the turbulence acting on it has a transverse direction with respect to the conveying direction. This can significantly increase the degree of action of the washing liquid.

According to one embodiment of the invention, each turbulence rises along the transverse direction described above. Thus, the turbulence acts upwards in the wash tub and all metal wires are easily passed through the turbulent flow of the same intensity during the transfer process since they are derived from turbulent sources equidistant from the metal wire or metal strip.

According to one preferred embodiment of the present invention, each metal wire or metal strip is passed through a plurality of turbulence continuously during the transfer process. Preferably, each turbulence exhibits a circular jet form, which forms a jet-type turbulent protrusion that projects above the level of the wash tub at rest. Thus, each metal wire or metal strip passes through a small continuous jet of turbulent flow. At this time, each metal wire or metal band not only passes each rising jet turbulence, but also passes intermediate turbulences formed when the washing liquid falls from the top of the jet turbulence into the washing tank.

According to one improved embodiment of the present invention, the cleaning method according to the present invention comprises a rinsing process in which one or more of the above metal wires or metal bands pass through several successive fluid membranes in front or behind the cleaning bath. The continuous fluid film flows in turbulence and one or more of the metal wires or metal bands are transported through the fluid film. Preferably, the rinsing procedure comprises the ejection of the rinsing fluid membrane with the flow of rising turbulence. Therefore, excellent waterproofing effect can be obtained at the inlet and the outlet of the washing tank through the continuous rinsing fluid membrane. The rinsing process is perfect and can be adjusted by increasing or decreasing the number of fluid membranes that will pass through the user's needs. As will be described in detail below, it is possible to pump fluid into a rinse washing tank when the rinse liquid jet formation is through a pressurized gas bubble. This can save considerable energy.

Other details regarding the method according to the invention will be described in claims 1 to 9.

The invention also relates to a device for cleaning metal wires or metal strips, the device comprising:

-Conveying drive means of at least one metal wire or metal strip, and

A tank comprising a wash bath in which the at least one metal wire or metal strip passes along the conveying direction.

According to the invention, the apparatus also comprises means for forming a turbulent flow of at least one wash liquor flowing across the metal wire or metal strip in the wash bath in a transverse direction with respect to the conveying direction. These turbulence forming means are arranged in the wash tank so that each metal wire or metal strip can pass through the corresponding one or more turbulences during the transfer process.

Other details relating to the device according to the invention will be described in claims 10 to 17.

1 is a longitudinal cross-sectional view of a cleaning installation according to the invention.

2 is a plan view of a washing tank according to the invention.

Hereinafter, other details and features of the present invention will be described non-limitingly with reference to the accompanying drawings.

The same or similar elements in the various drawings use the same reference numerals.

1 shows a washing apparatus with a tank 1 comprising a washing tank 2 containing a washing liquid. Generally as a washing | cleaning liquid, hydrochloric acid, such as hydrochloric acid or sulfuric acid, is used. In this example, 17% aqueous HCI solution (186 g / l) was used.

1 is a view in which a steel wire strand 3 is transported horizontally. Only one steel wire is shown on FIG. This steel wire is conveyed by the conveying drive means 4, 5 which are known per se. The conveying drive means here are only shown schematically.

In the embodiment shown, one caisson 6 is arranged under the wire strand 3 in the wash bath. This caisson 6 has a cavity 7 in communication with the pump 9 via a bottom tube 8, which is already known per se as a centrifugal pump, here a washing tank. (2) locked within. The pump 9 can suck the washing liquid of the washing tank 2 and transfer the pressurized washing liquid to the cavity 7 of the caisson 6.

The side of the caisson 6 at the front of the wire strand 3 forms a closing cover 10, which has an opening 11, through which the rising turbulence 29 of the washing liquid is ejected. In the embodiment shown, the openings 11 are circularly arranged at regular intervals below the steel strands.

The closing cover 10 varies in size depending on the object to be cleaned. On this plate the openings 11 can be arranged in the same way or five points for each steel wire. For example, for an opening of 7 mm diameter, a pitch of 50 x 38 mm can be provided between the openings.

The caisson is supported underneath the liner strands 3 which extend from the inlet 12 of the tank to the outlet 13 (omitted in the middle) in the tank. However, in the illustrated embodiment, a discharge gap is left between the caisson 6 and the inlet 12 and the outlet 13 so that the washing liquid reaching the edge of the caisson can be discharged into the tank 1.

The support elements 14 support the wire strands at a predetermined interval so that the wires can keep a short distance from the closing cover of the caisson 6. These elements are then always submerged in the wash liquor exiting through the opening 11.

In operation of the pump 9, the washing liquid is pumped into the caisson 6 and discharged from the caisson through the openings 11, for example under a pressure of 5000 l / h / m 2 of the caisson surface. As a result, the wash liquor forms small continuous jet turbulence (especially see FIG. 2) through which the steel wire passes. This results in an excellent cleaning effect with low energy consumption.

A steel wire rinsing tank may be provided at the front or the rear of the washing tank 1. In the embodiment shown, only one rinse tank 15 is shown disposed behind the wash tank. However, a rinse tank may also be provided which is arranged symmetrically in front.

In the embodiment shown, the rinse tank 15 comprises water for rinsing. This water may enter through the inlet 16 and may be discharged through the drain 17. The drain can be in communication with the lower inlet 18 to circulate the water for rinsing.

In the illustrated embodiment, the rinse tank 15 includes tools for ascending water film ejection. These tools comprise air supply conduits 19, 20, 21 which are parallel to each other and which are provided at the bottom of the tank transverse to the conveying direction of the steel wire or the strip steel. Each conduit is connected to a pressurized air source (not shown) so that it can be shut off individually. The conduits 19, 20, 21 are perforated to supply compressed air bubbles to the water in the tank. On each conduit 19, 20, 21, two guide plates 22, 23 are supported by the longitudinal walls of the tank so that they can pass through the tank. The gap between the guide plates on the upper end side of the plate, which is located above the water surface, is very small, so that its exit has only a very narrow gap. At their lower ends, located slightly lower than the air supply conduits, the guide plates 22, 23 form a much larger gap than the gap formed at the top. The guide plates thus form a kind of roof between the two sides, whereby the bubbles are forced to the top. In the case of the example shown, with a slightly higher air pressure than the water column, for example a water pressure (9806 Pa) of 1000 mm, the air bubbles drive the water in the tank while rising, causing the random film 24 to blow up. At the top of the water film, the water can be divided into two stems, forming two eggs (25, 26) through which the wire passes.

The guide plate pairs 22 and 23 may be disposed adjacent to each other so that the random numbers of two adjacent water films may cross each other. In this way, the wire can be transported continuously submerged in water on the width of the water film, which is typically 15 cm or more. This allows the wash tank to be completely waterproof at the outlet of the acid.

In some cases, a lid 27 may be provided that closes the tank top, which preferably has a deflector 28 which directs the direction of the fountains 25, 26.

Thereby, the rinsing operation can be performed efficiently without pumping of the fluid and without the need for a cascade.

The present invention is not limited to the above described embodiments, and various modifications are possible without departing from the spirit of the following claims.

For example, the openings in the caisson may be provided to have a lined shape, which has a longitudinal axis that overlaps with the direction of transport of the corresponding steel wire or band steel upon horizontal ejection. It is also contemplated that the shape has one opening extending for each steel wire, which extends along almost the entire length of the caisson 6 along the steel wire. Each steel wire passes through only one rising turbulence of long length.

Also, a plurality of openings extending in the transverse direction with respect to the conveying direction of the steel wire or the band steels may be provided in the caisson 6. In this case, in the tank 1, a plurality of washing liquid ascending membranes through which steel wire or strip steel pass continuously are formed.

Claims (17)

In the cleaning method of a metal wire or metal strip comprising the step of transferring the at least one metal wire or metal strip in a predetermined direction to pass through the washing tank containing the cleaning liquid, Forming turbulent flow of at least one wash liquor in said wash bath which crosses said metal wire or metal strip in a transverse direction with respect to a conveying direction and forms a jet-type turbulent protrusion projecting above the level of the wash bath at rest; A method of cleaning a metal wire or metal strip, wherein each metal wire or metal strip moves through a corresponding one or more turbulences during the transfer process. The method of claim 1, Wherein each turbulence rises along the transverse direction. The method according to claim 1 or 2, Wherein each metal wire or metal strip continuously passes through the plurality of turbulences during the transfer process. The method of claim 3, Wherein each turbulence exhibits a circular jet form. The method of claim 3, Wherein each turbulence represents a spray form having a portion extending along the conveying direction, the spray form projecting upwards above the level of the wash tub in a resting state. The method according to claim 1 or 2, During the transfer process, each metal wire or metal strip passes through a turbulent flow along which it extends in the longitudinal direction and rises in the transverse direction. The method of claim 3, Wherein each continuous turbulent flow has the form of a fluid membrane having portions extending transverse to the conveying direction and protrude above the level of the wash tub in a resting state. The method according to any one of claims 1 to 7, And a rinsing process in which one or more of the metal wires or metal strips pass through a plurality of continuous fluid membranes flowing in turbulent flow at the front or the back of the washing tank containing the cleaning liquid, wherein the one or more metal wires or metal strips are transported through the fluid membrane. Characterized in that the method. The method of claim 8, The rinsing process comprises ejecting the rinsing fluid film according to the flow of rising turbulence. -Conveying drive means 4, 5 of at least one metal wire or metal strip 3, and -An apparatus for cleaning a metal wire or metal strip comprising a tank (1) having a cleaning bath (2) containing a cleaning liquid through which the at least one metal wire or metal strip passes along the conveying direction, Forming at least one wash liquid turbulent flow 29 in the wash bath which crosses the metal wire or metal strip 3 in a transverse direction with respect to a conveying direction and forms a jet-type turbulent protrusion which projects above the level of the wash bath in a resting state. And turbulence forming means arranged in the wash tank (1) such that each metal wire or metal strip can move through the corresponding one or more turbulences (29) during the transport process. The method of claim 10, wherein the turbulence forming means, A caisson 6 disposed below the at least one metal wire or metal strip 3 in the washing tank 2, A feed pump 9 which pressurizes the cleaning liquid into the caisson 6, and A closing cover (10) which closes the caisson against the at least one metal wire or metal strip and has openings (11) through which the turbulence is discharged along an upward movement. The method of claim 11, The openings (11) of the closing cover (10) are characterized in that the holes have a circular cross section. The method of claim 12, The closing cover (10) is characterized in that it has a plurality of openings (11) arranged at regular intervals along the conveying direction of each metal wire or metal strip. The method of claim 11, The openings (11) of the closing cover (10) are characterized in that they extend along the conveying direction of each metal wire or metal strip (3) which is cleaned during horizontal ejection. The method according to any one of claims 10 to 14, And a washing liquid circulation means for causing the fluid derived from said formed turbulence (29) to return to said feed pump (9) after contact with said at least one metal wire or metal strip (3). The method according to any one of claims 10 to 15, The tank 1 is closed against the outside atmosphere, and the opposing sidewalls of the tank are provided with one opening adapted for the inlet 12 and the outlet 13 of each of the one or more metal wires or metal strips 3. Apparatus characterized in that the. The method of claim 16, In front of the inlet 12 or behind the outlet 13, there is a tank 15 containing a rinsing solution in which the rinsing solution is a continuous egg through which one or more metal wires or metal strips 3 pass. And a rinsing device for forming the water film (24).

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