KR101383808B1 - Apparatus for measuring evaporation amount of ash in a snout - Google Patents

Abstract

The present invention includes a snout disposed between a heating furnace and a plating bath, and an end portion of which is immersed under the hot water surface of the plating bath, a pass line connected to the snout, and an internal gas of the snout being introduced into the internal gas. A gas collecting unit including a filter collecting the plated particles included therein; a signal detecting unit detecting a measurement signal by applying a voltage to the filter; and a control unit configured to calculate a plating component evaporation amount in the snout according to the measurement signal. Disclosed is an apparatus for measuring evaporation amount of ash inside a snout.

Description

Ash evaporation measuring device inside the snout {APPARATUS FOR MEASURING EVAPORATION AMOUNT OF ASH IN A SNOUT}

The present invention relates to an apparatus for measuring ash evaporation amount inside a snout.

Plated steel sheets, in particular hot-dip galvanized steel sheets, are expanding their range of application from general building materials to automotive exterior plates that require strict quality control.

In particular, in the case of the automobile exterior plate material which is recently increased in use, since the surface properties are very important as well as the corrosion resistance, strict surface quality control is required.

Conventionally used galvanizing process is, as shown in Figure 1, the cold-rolled steel sheet 1 is heat-treated in the heating furnace 10 to remove the residual stress, the heated steel sheet 1 is melted while being maintained at an appropriate temperature Zinc (A) is introduced into the plating bath 12 filled with.

In this case, the facility connected between the heating furnace 10 and the plating bath 12 is a snout 11 provided to prevent surface oxidation as the steel plate heat treated at a high temperature is exposed to the atmosphere. An inside of the snout 11 may be filled with an inert gas to prevent plating failure of the steel sheet by surface oxidation.

Due to this configuration, the plated steel sheet 1 passing through the heating furnace 10, the snout 11, and the sink roll 13 of the plating bath 12 is disposed in the upper portion of the plating bath 12 by an air knife ( 14) is adjusted to the amount of plating required by the customer.

However, in the inner wall (inner surface) of the snout 11, the zinc vapor is formed by condensation of the evaporated zinc vapor into ash (a, Ash), and the zinc material adheres and accumulates on the inner wall of the snout 11. .

If the size of the zinc material exceeds the critical level, there is a problem that the surface of the steel plate (1) to be plated to float on the surface of the molten zinc floating in the plating bath 12, causing surface defects. In addition, since zinc material causes linear defects and non-plating on the surface of the steel sheet, there is a problem of being a fatal defect factor in high-quality galvanized products.

These zinc materials are caused by zinc evaporation due to various factors such as evaporation and condensation of zinc, stagnation of atmospheric gas inside the snout, fluctuations of molten zinc, and the like. These zinc materials are usually Zn and ZnO compounds.

In order to suppress the generation of zinc in the snout, a number of techniques for preventing the production of zinc have been disclosed. However, such a technique cannot measure the ash evaporation in the snout in real time. There is a problem that it is difficult to establish appropriate measures.

The present invention provides a measuring device that can measure the amount of ash evaporation in the snout in real time.

An apparatus for measuring evaporation amount of ash inside a snout according to the present invention includes: a snout disposed between a heating furnace and a plating bath, and an end portion of which is immersed below the hot water surface of the plating bath; A pass line connected to the snout and into which the internal gas of the snout flows; A gas collecting unit including a filter collecting the plating particles contained in the internal gas; A signal detector for detecting a measurement signal by applying a voltage to the filter; And a controller configured to calculate a plating component evaporation amount in the snout according to the measurement signal.

In the apparatus for measuring ash evaporation amount in a snout according to the present invention, the pass line is connected to the snout and the pipeline into which the internal gas flows, and is disposed at the end of the pipeline to inject the internal gas into the filter. It includes a spray nozzle.

In the ash evaporation measuring device in the snout according to the present invention, the filter includes a mesh network having a predetermined gap and electrodes formed at both ends of the mesh network, the signal detection unit by applying a voltage to both ends of the electrode The current value or the resistance value changed according to the amount of plating particles collected can be measured.

In the ash evaporation measuring apparatus inside the snout according to the present invention, the injection nozzle may be movable back and forth to be in close contact or spaced apart on one surface of the filter.

In the ash evaporation measuring device in the snout according to the present invention, the injection nozzle comprises a suction nozzle to be in close contact with the other surface of the filter when the internal gas is sprayed to suck the internal gas.

In the ash evaporation measuring device in the snout according to the present invention, a plurality of filters are connected to each other to form a strip-shaped rail, the rail is configured to be rotatable by a rotating roller.

In the ash evaporation measuring apparatus inside the snout according to the present invention, one end of the rail is immersed in the washing tank, the washing tank is the plated particle washing liquid is carried.

In the ash evaporation measuring device in the snout according to the present invention, a washing nozzle for removing the plating component adsorbed on the filter.

According to the present invention, the amount of ash evaporation inside the snout can be measured in real time. In addition, depending on the amount of evaporation measured in real time, various operations are possible to prevent the defect of the ash.

1 is a schematic diagram of a conventional plating equipment,
2 is a conceptual diagram of a measuring device according to an embodiment of the present invention,
3 is a perspective view of a gas collecting unit according to an embodiment of the present invention,
Figure 4 is a side view showing the arrangement of the injection nozzle and the gas collecting unit according to an embodiment of the present invention,
5 is a perspective view showing a state in which the injection nozzle and the filter in close contact according to an embodiment of the present invention,
6 is an enlarged view of a close contact portion of the injection nozzle and the filter according to an embodiment of the present invention,
7 is a block diagram of a measuring device according to an embodiment of the present invention,
8 is a modification of the washing apparatus according to an embodiment of the present invention,
9 is another modified example of the washing apparatus according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the present invention, the terms "comprising" or "having ", and the like, specify that the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

It is to be understood that the drawings are to be construed as illustrative and not restrictive.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

2 is a conceptual diagram of a measuring device according to an embodiment of the present invention. Referring to FIG. 2, a measuring apparatus according to an exemplary embodiment of the present invention includes a snout 100 disposed between a heating furnace and a plating bath 120 and having an end portion immersed under a bath surface of the plating bath 120. A gas collecting part 300 connected to the snout 100 and including a pass line 200 into which the internal gas of the snout 100 flows, and a filter for collecting the plated particles contained in the internal gas; A signal detector 400 detecting a measurement signal according to the collection amount of the plating particles by applying a voltage to a filter, and a controller 500 calculating an evaporation amount of the plating component evaporated into the snout 100 according to the measurement signal. ).

The snout 100 is disposed between the heating furnace and the plating bath 120, and one end thereof is immersed under the hot water surface of the plating bath 120 so that the steel sheet 1 passing through the snout 100 contacts the outside air. It is configured so that it can be directly immersed in the plating solution. Inside the snout 100 may be filled with an inert gas to prevent plating failure of the steel sheet by surface oxidation.

The plated amount of the steel sheet 1 passed through the snout 100 and supported on the plating bath 12 is controlled by an air knife disposed above the plating bath 120.

The pass line 200 is configured to be in communication with the side of the snout 100 so that the internal gas of the snout 100 can be introduced, and specifically, the pipeline 210 and the valve connected to the snout 100 are provided. 220, and injection nozzle 230.

The valve 220 regulates the flow rate of the internal gas introduced through the pipeline 210, and is normally closed to control the movement of the internal gas, and is opened when the control signal is applied to move the internal gas. If necessary, a suction pump for sucking the internal gas from the snout 100 may be additionally installed.

The injection nozzle 230 is configured to be positioned at the end of the pipeline 210 to inject the internal gas to the gas collecting unit 300 at a predetermined pressure. When the internal gas is injected through the injection nozzle 230, the plated particles included in the internal gas are collected in the filter provided in the gas collecting unit 300.

The signal measuring unit 400 applies a voltage to the filter and measures the change in the measured signal (current value or resistance value) that is changed according to the amount of plated particles are collected and transmits the measured signal to the controller 500.

The controller 500 measures the evaporation amount inside the snout 100 in real time by calculating the evaporation amount using the received measurement signal. Hereinafter, in the present embodiment, the plated particles are described as zinc (Zn), but the plated particles may be variously changed as necessary.

Figure 3 is a perspective view of the gas collecting unit according to an embodiment of the present invention, Figure 4 is a side view showing the arrangement of the injection nozzle and the gas collecting unit according to an embodiment of the present invention, Figure 5 is an embodiment of the present invention FIG. 6 is a perspective view illustrating a state in which the injection nozzle and the filter are in close contact with each other, and FIG. 6 is an enlarged view of a part in which the injection nozzle and the filter are in close contact with each other according to an embodiment of the present invention.

3 and 4, the gas collecting unit 300 has a plurality of filters 311 connected to form a strip-shaped rail 310, and both ends of the rail 310 have a rotating roller 320. Is arranged to rotate the rail 310 is configured to continuously capture the zinc particles.

In addition, a washing tank 330 is provided to accommodate one end of the rail 310, the washing tank 330 is formed with a space portion 331 for supporting the plating solution washing liquid. Therefore, when the zinc particles injected from the injection nozzle 230 are collected in the filter 311, the filter 311 in which the zinc particles are collected by rotation is supported by the washing solution B of the washing tank 330 and washed. At this time, the washing liquid (B) may be a sulfuric acid solution in which zinc particles are melted, and the washing tank 330 may be provided with a washing liquid input nozzle 331 and a discharge nozzle 332 to maintain a constant washing liquid concentration.

The injection nozzle 230 is configured to be movable back and forth to be in close contact with one surface of the filter 311 when the internal gas is injected. Specifically, the injection nozzle 230 is composed of a flexible nozzle and is configured to be in close contact with the filter 311 by a drive motor or the like. By this configuration, most of the internal gas injected from the injection nozzle 230 passes through the filter 311, so that the measurement is accurate.

At this time, when the injection nozzle 230 and the filter 311 is in close contact, the suction nozzle 240 is in close contact with the filter 311 on the opposite side. Since the plated particles such as zinc are generally harmful substances, when exposed to the outside after passing through the filter 311, problems such as environmental pollution may occur. Therefore, the internal gas passing through the filter 311 is absorbed by the absorption nozzle 240 is stored in a separate storage tank or discharged to the outside through additional filtering (filtration) to solve the problem of environmental pollution. In addition, since the injection nozzle 230 and the suction nozzle 240 are in close contact with the filter 311 in both directions, the measurement becomes more accurate.

Referring to FIG. 5, an insulating pad 231a is formed at the end of the contact portion 231 of the injection nozzle 230 to be in close contact with the electrode 311b of the filter 311. Therefore, the current applied to the filter 311 at the time of close contact is configured such that it is not shorted by the injection nozzle 230. The insulating pads 231a may be disposed at intervals corresponding to the positions at which the electrodes 331b are formed. In addition, an insulating pad may be formed in the above-described absorption nozzle 240 for the same reason.

Referring to FIG. 6, the filter 311 includes a square mesh network 331a and electrodes 331b formed at both ends of the mesh network 331a. The mesh net 331a may be selected according to the type of plating particles. For example, when the plating particles are zinc, a mesh network having a gap of about 5 μm may be selected as the mesh network 331a.

Each of the mesh nets 331a is formed of a plate having the same size and the same resistance to form a rail 310, and is configured such that a voltage is applied only to the electrode 331b of the mesh net 331a which performs the work. Therefore, when zinc particles are collected in the mesh network 331a, the current value or the resistance value is changed, and the signal measuring unit measures the current value or the resistance value.

7 is a block diagram of a measuring device according to an embodiment of the present invention. Hereinafter, the ash evaporation measurement process according to the present invention will be described with reference to FIGS. 2, 4 and 7.

First, the controller 500 outputs an open control signal to the valve 220 to allow the internal gas of the snout 100 to flow through the pipeline 210. Thereafter, the injection nozzle 230 and the suction nozzle 240 are in close contact with the filter 311, and then the internal gas is injected into the filter 311.

At this time, the signal measuring unit 400 applies a voltage to the filter 311 and measures the changed current value or resistance value and transmits it to the control unit 500. The controller 500 calculates the amount of ash evaporated in the stout according to the received current value or resistance value.

The controller 500 may calculate the amount of evaporation by comparing the measured current value or the resistance value with the data of the current value or the resistance value according to the concentration of zinc particles. The memory evaporation amount table value according to the current value or the resistance value may be stored in the memory unit 410.

The control unit 500 outputs the measured evaporation amount to the display unit 600 and controls the exhaust valve 110 according to the evaporation amount to forcibly discharge the gas inside the snout 100 to thereby remove the ashes in the snout 100. The amount of evaporation can be controlled. In addition, when the evaporation amount exceeds a preset reference value, a warning alarm signal may be output to the display unit 600.

After that, once the measurement is finished, the control unit 500 may drive the rotary roller 320 to rotate the filter 311 used for the measurement to proceed with the washing process. However, this cleaning method may be variously modified. For example, the cleaning nozzle 340 may be provided at the rear of the filter 311 to spray the washing gas, and the filter 311 may be formed using the electromagnetic repulsive device 350 as shown in FIG. It is also possible to remove the zinc particles sprayed on.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, .

100: snout 200: passline
210: pipeline 220: valve
230: injection nozzle 300: gas collecting unit
310: rail 311: filter
311a: mesh network 311b: electrode
320: rotary roller 330: washing tank
400: signal measuring unit 500: control unit

Claims (8)

A snout disposed between the heating furnace and the plating bath, the end portion of which is immersed below the bath surface of the plating bath;
A pass line connected to the snout and into which the internal gas of the snout flows;
A gas collecting part connected to the pass line and including a filter to collect plating particles included in the internal gas;
A signal detector for detecting a measurement signal by applying a voltage to the filter; And
And an evaporation amount of the ash inside the snout according to the measurement signal. The method of claim 1, wherein the pass line,
A pipeline connected to the snout and into which the internal gas flows;
An apparatus for measuring evaporation amount of ash inside a snout including a spray nozzle disposed at an end of the pipeline and spraying an internal gas to the filter. 3. The method of claim 2,
The filter includes a mesh network having a predetermined gap and electrodes formed at both ends of the mesh network, and the signal detection unit applies a voltage to both ends of the electrode to change a current value or a resistance value changed according to the collection amount of the plating particles. Ash evaporation measuring device inside the measuring snout. 3. The method of claim 2,
The injection nozzle is an ash evaporation measuring device inside the snout which is movable back and forth to be in close contact with or spaced from one surface of the filter. 5. The method of claim 4,
An apparatus for measuring evaporation amount of ash inside a snout including a suction nozzle which is in close contact with the other surface of the filter and sucks the internal gas when the internal gas is injected from the injection nozzle. The method of claim 1,
The plurality of filters are connected to each other to form a strip-shaped rail, the rail is an ash evaporation measuring device inside the snout rotatable by a rotating roller. The method according to claim 6,
The end of the rail is immersed in the washing tank, the washing tank is the ash evaporation measuring apparatus inside the snout in which the plated particle washing solution is carried. The method of claim 1,
An apparatus for measuring evaporation amount of ash inside a snout including a washing nozzle for removing a plating component adsorbed on the filter.

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