KR101820750B1 - Hoffman filter - Google Patents

Hoffman filter Download PDF

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Publication number
KR101820750B1
KR101820750B1 KR1020150184521A KR20150184521A KR101820750B1 KR 101820750 B1 KR101820750 B1 KR 101820750B1 KR 1020150184521 A KR1020150184521 A KR 1020150184521A KR 20150184521 A KR20150184521 A KR 20150184521A KR 101820750 B1 KR101820750 B1 KR 101820750B1
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KR
South Korea
Prior art keywords
conveyor chain
insulating block
bus bar
medium
main body
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Application number
KR1020150184521A
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Korean (ko)
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KR20170075184A (en
Inventor
박재성
Original Assignee
주식회사 포스코
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Priority to KR1020150184521A priority Critical patent/KR101820750B1/en
Publication of KR20170075184A publication Critical patent/KR20170075184A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/16—Magnetic separation acting directly on the substance being separated with material carriers in the form of belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/16—Magnetic separation acting directly on the substance being separated with material carriers in the form of belts
    • B03C1/18—Magnetic separation acting directly on the substance being separated with material carriers in the form of belts with magnets moving during operation
    • B03C1/20—Magnetic separation acting directly on the substance being separated with material carriers in the form of belts with magnets moving during operation in the form of belts, e.g. cross-belt type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/30—Combinations with other devices, not otherwise provided for

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Abstract

The present invention relates to a Hoffmann filter. A Hoffman filter according to an embodiment of the present invention includes a conveyor chain installed in a body so as to be able to orbitally move a medium for filtrating a fluid in one direction and an electromagnet for selectively electromagnetizing at least a part of the conveyor chain . Therefore, it is possible to ensure the cleanliness of the fluid by easy removal of the iron powder, and the fluid can be easily reused.

Figure R1020150184521

Description

Hoffman filter {HOFFMAN FILTER}

The present invention relates to a Hoffmann filter. And more particularly to a Hoffman filter for filtering fluids.

For example, Pickling & Cold Rolling Mill (PCM) of a cold rolling mill is a process of producing a hot-rolled coil as raw material (H / C) through pickling and cold rolling as full hard (F / H) , 5 to 6 mill stands are used for pickling, and the hot-rolled coils with the scale of the surface layer removed are continuously pressed down. This occurs between the strips and the stand rolls A lubricating and cooling function fluid, for example, rolling oil, is sprayed.

The rolling oil may contain foreign matter including steel pieces. When the foreign matter is sprayed together with the rolling oil, a roll mark may be generated on the surface of the strip, or a foreign matter may be developed. Therefore, it is important to secure the cleanliness of the rolling oil sprayed on the surface of the strip.

The Hoffman filter is a filtration device that is provided for securing such cleanliness. It is used for cold rolling and then passes through a magnetic separator and passes through a fiber filter called "Media" Thereby removing foreign matter contained in the rolling oil. This will be described in detail with reference to the accompanying drawings.

1 is a schematic view showing a filtration process using a Hoffmann filter according to the related art. That is, as shown in FIG. 1, the Hoffman filter 1 filters the rolling oil, which is firstly removed from the cold rolling apparatus 2 and passed through the magnetic separator 3, to remove the foreign matter and iron powder. And a conveyor chain (conveyor chain) for conveying the medium 20.

The conveyor chain 30 stops the medium 20 for 30 minutes, for example, and advances the filtration operation. After that, the medium 20 is conveyed by about 10 to 12 m through orbital motion. The transferred waste medium 20 is discarded after being cut. Here, the rolling oil filtered through the Hoffman filter 1 is recovered and discharged to the storage tank 4 so as to be reused and re-supplied to the cold rolling facility 2 by the pump 5.

However, the Hoffman filter 1 according to the related art only physically filters impurities and iron particles using the medium 20, and when the iron powder passes through the mesh of the medium 20, When the rolling oil is fed again to the equipment 2, it is sprayed on the surface of the strip, so that the preceding problem can be recurred.

In other words, the mesh 20 is generally formed to have a mesh size of 35 to 60 탆. When the iron particles are smaller in size than the mesh size, they are not filtered and are discharged to the storage tank 4 as they are. If it is small, there is a problem that it is filtered to the rolling oil, which may lead to a decrease in the concentration of the rolling oil.

JP 2000-262808 A

It is an object of the present invention to provide a Hoffman filter which can easily remove iron from a fluid.

In order to achieve the above object,

A Hoffmann filter according to an embodiment of the present invention includes a medium for filtering a fluid;

A conveyor chain provided on the body so as to be able to orbitally move the medium in one direction; And

An electromagnet generating unit installed in the main body and selectively electrifying at least a part of the conveyor chain;

. ≪ / RTI >

Further, in the Hoffmann filter according to an embodiment of the present invention, the electromagnet generating unit may electrify a conveyor chain in contact with the medium.

Further, in the Hoffmann filter according to an embodiment of the present invention, the electromagnet generating unit is provided in a conveyor chain, and the both ends protrude in the width direction of the conveyor chain to form an electrode unit; And

An insulation block installed in a frame constituting a side surface of the main body, the main body including a bus bar for supplying power to the electrode unit;

. ≪ / RTI >

Further, a Hoffmann filter according to an embodiment of the present invention includes: a sealing part provided on a frame so as to be disposed on the insulating block and sealing the insulating block;

As shown in FIG.

Further, in the Hoffmann filter according to an embodiment of the present invention, the sealing portion may be provided as a rubber seal and a spring plate.

Further, the Hoffmann filter according to an embodiment of the present invention includes a drain line installed in the main body and collecting iron powder separated from the conveyor chain;

As shown in FIG.

These solutions will become more apparent from the following detailed description of the invention based on the attached drawings.

Prior to this, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor should appropriately define the concept of the term in order to describe its invention in the best way possible It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

According to one embodiment of the present invention, the cleanliness of the fluid can be ensured by the easy removal of the iron powder, thereby facilitating the reuse of the fluid.

1 is a schematic view showing a filtration process using a Hoffmann filter according to the related art.
FIG. 2 is a front view of a general Hoffman filter according to an embodiment of the present invention. FIG.
3 is a side view showing a main part of a Hoffmann filter according to an embodiment of the present invention;
4 is a perspective view showing a main part of a Hoffman filter according to an embodiment of the present invention.
FIG. 5 is a front view showing a filtration process using a Hoffman filter according to an embodiment of the present invention. FIG.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.

Although not defined differently, all terms including technical terms and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Commonly used predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

The Hoffmann filter according to an embodiment of the present invention is a structure for easily removing iron contained in a fluid including rolling oil by using a property that an object is magnetized in a magnetic field, When a magnetic field is generated by selectively supplying power to at least a part of a conveyor chain installed in the main body so as to be able to orbit the main body, the magnetic moment of the atom is aligned and electrostatically affected by the magnetic field, And can be easily removed. Here, when the power supply is interrupted to remove the magnetic field, the self-alignment disappears, thereby preventing the iron powder from sticking to the conveyor chain.

Therefore, according to one embodiment of the present invention, it is possible to ensure cleanliness by easy removal of iron powder contained in the fluid, and thereby, for example, to reduce the frictional resistance generated between the strip and the roll in the cold rolling process, There is a problem that roll marks and foreign matter defects that can be generated by the iron powder in the process of spraying on the surface can be easily prevented.

Meanwhile, the fluid to be introduced into the Hoffman filter according to an embodiment of the present invention will be described as a rolling oil that is first removed from the iron pieces while being discharged from the cold rolling facility and passing through the magnetic separator. However, The present invention is not limited thereto, and it goes without saying that any fluid that is commonly used in a coolant system can be applied.

In addition, the medium for filtering such fluid is a term used in the art to which the Hoffmann filter belongs, and it is described as 'media' to prevent confusion caused by the use of the same terms such as 'Hoffmann filter' and 'filter' , It should be understood that it should be interpreted in the same meaning as a filter, a filter part or a filtration part which is generally used in a filtration device.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2, the Hoffman filter 1 according to the embodiment of the present invention is installed on the upper part of the main body 10, and can supply the rolling oil supplied from the supply part 11, The medium 20 is disposed horizontally across the main body 10 so that the main body 10 can be filtered by the main body 20 and the conveyor chain 30 is installed to be able to orbit the bottom of the medium 20. [

The medium 20 is provided, for example, in the form of a cloth fabricated by weaving a fibrous structure to filter foreign matters and iron particles contained in the rolling oil supplied from the supply part 11. The first and second rolls 21 by wrapping over a second roll 22 disposed opposite the first roll 21 past the conveyor chain 30. The second roll 22 can be disposed across the main body 10,

The conveyor chain 30 is installed on both sides of the main body 10 in the figure and rotates about the first and second shafts 31 and 32 rotated by a driving unit 12, So that the orbital motion can be performed while drawing an ellipse in cooperation with the driving unit 12. The mediator 20, which has filtered the rolling oil through the orbital motion, is transported in one direction, that is, rightward in the drawing do.

Here, the conveyor chain 30 orbitally moves about the first and second shafts 31 and 32 in a downwardly oriented state, that is, the 'C' is laid sideways, The filtration area of the medium 20 can be easily increased. A guide roll or a sprocket for guiding the orbital motion of the conveyor chain 30 may be applied to the conveyor chain 30, It is self-evident in the field. The waste medium 20 transferred through the conveyor chain 30 is cut off and discarded into the waste box 13.

The Hoffman filter 1 according to an embodiment of the present invention includes an electromagnet generator 40 that electrifies at least a part of the conveyor chain 30 by supplying power to the conveyor chain 30, have.

3 to 5, the electromagnet generating unit 40 includes an insulating block 43 having a built-in wire, i.e., a wire 41 and a bus bar 42 for supplying power to the electric wire 41, . The electric wire 41 is wound around the conveyor chain 30 and protrudes at both ends of the electric wire 41 in the width direction of the conveyor chain 30 to receive power from the bus bar 42 41a.

The electric wire 41 may be provided in a manner to bind and bind the holes of the conveyor chain 30 in a stranded manner or may be fabricated in a substantially same mesh network as the conveyor chain 30 to cover the entire conveyor chain 30 Or may be provided in various other ways. That is, the matters relating to the provision of the electric wire 41 can be selected according to the operation site.

An insulating block 43 having a bus bar 42 for supplying power to the electric wire 41 is provided for sealing and insuring the bus bar 42. The insulating block 43 is provided to the side of the main body 10 An opening portion 43a is formed in the longitudinal direction of the frame 10a and one side of the frame portion 10a can expose the bus bar 42 to the outside so that the electrode portion 41a passes through the opening 43a The electric power is supplied by contact with the bus bar 42 so that the conveyor chain 30 has magnetic force on the principle of the electromagnet.

That is, the insulating block 43 may be formed in various shapes including a rectangular shape, a triangular shape, or a circular shape in its longitudinal section, and an opening 43a for externally exposing the built-in bus bar 42 may be formed in the conveyor chain 30, that is, on the side of the drawing, and is installed in the longitudinal direction of the frame 10a.

A part of the conveyor chain 30 electromagnetically electrified by the electromagnet generating unit 40 is in contact with the mediar 20 and the fact that the upper section S is electro- And it is also easy to prevent the iron powder from sticking to the conveyor chain 30. The insulating block 43 can be installed on the frame 10a in substantially the same track as the conveyor chain 30 and can supply power only to the upper section S of the conveyor chain 30 in contact with the medium 20. [ So that the electromagnet function is selectively given.

In another embodiment, the insulating block 43 may be installed only in the frame 10a corresponding to the upper section S of the conveyor chain 30. [ That is, since the insulation block 43 can be installed in various ways, the matters relating to the installation thereof can be selected according to the operation site.

The bus bar 42 embedded in the insulating block 43 is constructed such that the right bus bar 42 is a negative pole and the opposite left bus bar 42 is a positive pole, The electric power is supplied to the conveyor chain 30 by electro-magnetizing the conveyor chain 30 so that the iron particles are concentrated on the medium 20 by magnetic force.

Here, the Hoffman filter 1 according to an embodiment of the present invention has a sealing part 50 disposed on the insulating block 43 so as to seal the insulating block 43 and prevent the inflow of the rolling oil.

The sealing portion 50 is provided as a spring plate 52 for preventing the rubber chamber 51 and the rubber chamber 51 from lifting and is inserted into the protrusion 10b formed in the frame 10a, Thereby preventing the rolling oil from flowing into the insulating block 43 during the filtration process of the rolling oil to cause electric problems such as short-circuit. The rubber chamber 51 and the spring plate 52 are bent in the downward direction in the drawing, that is, toward the conveyor chain 30, The more easily the sealing is achieved.

2, the Hoffman filter 1 according to an embodiment of the present invention includes a drain 10 and a drain 14. When the drain of the electromagnet of the conveyor chain 30 is released due to interruption of power supply, The iron powder remains in the conveyor chain 30 and is prevented from being mixed into the rolling oil while being separated during orbital movement of the conveyor chain 30. [

The drain portion 14 is provided at the exit side of the main body 10 cut off after the medium 20 is transported, that is, adjacent to the disposal box 13, so that the drain portion 14 is separated from the conveyor chain 30 It is possible to collect the iron powder easily and to prevent the inflow of the rolling oil.

Here, the Hoffman filter 1 according to an embodiment of the present invention can be operated as follows. It should be noted, however, that this is intended to help the understanding of the Hoffman filter 1 and is only one example of its operation.

The rolling oil filtered by the Hoffman filter will be described on the basis of rolling oil discharged from the cold rolling mill and passed through the magnetic separator to remove the iron pieces.

5, when the rolling oil is supplied to the Hoffman filter 1 by the valve opening of the supply part 11, the conveyor chain 30 in contact with the medium 20 stops the medium 20 for about 30 minutes. So that the rolling oil is filtered. At this time, the upper section S of the conveyor chain 30 in contact with the medium 20 is in a state where power is supplied by the electromagnet generator 40 to be electro-magnetized. Therefore, And coagulated and removed from the rolling oil.

Thereafter, the conveyor chain 30 moves the medium 20, which has filtered the rolling oil, in the direction of the waste box 13 by 10 to 12 m while taking orbital motion in conjunction with the driving unit 12, draws out the new medium 20, The electric power is supplied to the conveyor chain 30 which enters the upper section S in this process so as to keep the electromagnet continuously. Thus, it is possible to easily perform the operation of removing the iron powder from the rolling oil .

Therefore, according to one embodiment of the present invention, it is possible to ensure cleanliness by easy removal of the iron powder contained in the rolling oil. Thus, for example, in the process of recovering and reusing the rolling oil, a roll mark A foreign matter defect, and the like can be easily prevented.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification or improvement is possible.

It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

1: Hoffmann filter 2: Cold rolling plant
3: Magnetic separator 4: Storage tank
5: Pump 10: Body
10a: frame 10b: protrusion
11: supply part 12:
13: Disposal box 14: Drain part
20: MEDIA 21: 1st roll
22: second roll 30: conveyor chain
31; First axis 32: Second axis
40: electromagnet generating unit 41: electric wire
41a: electrode part 42: bus bar
43: insulation block 43a: opening
50: sealing part 51: rubber sealing
52: Spring plate S: Upper section

Claims (5)

Media to filter fluid;
A conveyor chain installed on the body so as to be able to move the medium in one direction; And
And an electromagnet generating unit installed in the main body and electrifying at least a part of the conveyor chain,
Wherein the electromagnet generating unit comprises:
An electric wire having an electrode part wound around the conveyor chain and having both ends protruded in a width direction of the conveyor chain;
A bus bar for supplying power; And
And an insulating block containing the bus bar,
Wherein the insulating block includes an opening formed to expose one side of the bus bar,
When the electrode unit passes through the opening by the orbital movement of the conveyor chain,
And the electrode portion is in contact with the bus bar to receive power.
The method according to claim 1,
Wherein the electromagnet generating unit supplies electric power only to an upper section of the conveyor chain in contact with the medium to electromagnetize the electromagnet.
The method of claim 2,
Wherein the opening of the insulating block is formed by a Hoffman filter formed along a longitudinal direction of a frame constituting a side surface of the main body,
The method of claim 3,
And a sealing part disposed on the insulating block and sealing the insulating block,
The sealing portion
Rubber seals; And
And a spring plate for preventing lifting of the rubber seal,
Wherein the rubber chamber and the spring plate are bent at one end in the downward direction.
The method according to claim 1,
A drain disposed in the main body for collecting iron powder separated from the conveyor chain;
/ RTI >
KR1020150184521A 2015-12-23 2015-12-23 Hoffman filter KR101820750B1 (en)

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Application Number Priority Date Filing Date Title
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KR101820750B1 true KR101820750B1 (en) 2018-03-08

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CN108854198B (en) * 2018-07-24 2021-02-19 宝钢股份黄石涂镀板有限公司 Synchronous press roll type filter bed device

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