Patent Description:
Generally, a fibrous filter includes fiber (fleeces) on a surface of a disc-shaped filter so as to filter out foreign matter using the fleeces while contaminated water or the like passes through the fiber and flows into the disc-type filter. In the fibrous filter, a backwash suction device configured to suction and remove foreign matter stuck to a surface of a fibrous disc filter using a backwash manner is mounted like the following patent documents <NUM> to <NUM>.

Patent Document <NUM> relates to a backwash suction device of a fibrous filter and is configured to increase each rotation amount of fleeces by forming an edge surface of a suction slit through which the fleeces move outward to be a tilted surface and allowing the fleeces suctioned in the suction slit while a fibrous disc filter rotates to come into contact with the tilted surface so as to increase a backwash effect. Also, since several frictional protrusions are formed on the tilted surface to protrude therefrom, the fleeces surpass the frictional protrusions one by one to be scrubbed on and rub with a washboard so as to further increase an effect of removing foreign matter.

Patent Document <NUM> is directed to providing a suction box for a backwash device of a fibrous filter in which parts of a body and a suction plate which come into contact with each other are formed to be coupled to each other in an uneven shape to prevent a fluid leakage without a sealing member, and the body and the suction plate are configured to be coupled to each other using a hook type so as to reduce manufacturing time and cost as well as production cost by decreasing the number of components. Particularly, Patent Document <NUM> is also directed to providing a suction box for a backwash device of a fibrous filter which is configured to easily and quickly mass-produce a complicated shape and to reduce manufacturing time and costs of components by injection-molding the body and the suction plate using plastic.

Since a suction nozzle is generally spaced apart from a disc while filtration is performed and a fluid sprayed through a spray nozzle rotates the suction nozzle to come into contact with a medium filter of the disc to perform backwash, frictional resistance between the medium filter and the suction nozzle is reduced so as to increase a filtration effect and prevent abrasion or damage of the medium filter or the suction nozzle when filtration is performed, and on the other hand, the suction nozzle is allowed to come into contact with the medium filter so as to increase a backwash effect when backwash is performed. Particularly, since a support bar which rotatably supports the suction nozzle is caught by a stopper to be spaced at a predetermined interval apart from the disc, durability of the disc may be increased by preventing the suction nozzle from functioning as frictional resistance when the disc rotates and a problem that suction performance is degraded due to suctioning many fibers in the suction nozzle may be solved.

Here, as shown in <FIG> and <FIG>, a backwash suction device <NUM> is installed in a filtration tank T to be pressed against a surface of each disc-type filter <NUM> installed to rotate in place and removes foreign matter stuck to fleeces <NUM> included in the disc-type filter <NUM> by suctioning the fleeces <NUM> when the fleeces <NUM> included in the disc-type filter <NUM> are suctioned in to filter out waste water. The backwash suction device <NUM> includes a suction body <NUM>' having a container shape to suction and discharge foreign matter removed from the fleeces <NUM> outward from the filtration tank T and a suction plate <NUM>" configured to close an open inlet part of the suction body <NUM>' and installed to face a surface of the disc-type filter <NUM> rotating in place. Also, the suction plate <NUM>" includes a slit <NUM> formed to suction the fleeces <NUM> exposed outward in the suction body <NUM>' and remove foreign matter as the disc-type filter <NUM> rotates.

Referring to <FIG>, in the backwash suction device <NUM>, the following problems occur.

<CIT> discloses a backwash suction device of a fibrous filter according to the preamble of Claim <NUM>.

<CIT> discloses a backwash header having static rods protruding from an exterior surface of a header body.

The present invention is directed to providing a backwash suction device of a fibrous filter in which a filtration efficiency of the fibrous filter is increased.

In some embodiments, an incised surface is formed by cutting one surface of a suction plate on the basis of a slit, a room is provided in a thickness part of the slit in which the incised surface is formed, and then a pattern roller is mounted in the room to rotate in place while partially protruding outward from the incised surface so that patterns are formed on a fleece surface that is backwashed while passing through the slit using the pattern roller and thus a filtration area of the fleeces increases so as to increase filtration efficiency of the fibrous filter.

In other embdiments, since a room is formed to be spaced at a certain distance apart from a slit in an incised surface, a filtration area of fleeces is increased in addition to providing a backwash effect using the room so as to further increase filtration efficiency of the fibrous filter.

The present invention is also directed to providing a backwash suction device of a fibrous filter in which at least one of patterns including splines formed to be lengthwise in a longitudinal direction thereof while each spline is cut to a certain length, patterns including several annular protrusions formed at predetermined intervals on an outer circumference of the pattern roller, spline-shaped patterns formed to be lengthwise in a longitudinal direction on an outer circumferential surface, and lattice-shaped patterns including repeated uneven parts is formed on a surface of the pattern roller so as to further increase a filtration area of a fleece surface using the patterns.

According to the present invention, there is provided a backwash suction device for a fibrous filter according to Claim <NUM>.

In a first aspect, the room (<NUM>) may be provided by cutting a part of a thickness of the slit (<NUM>) in which the incised surface (<NUM>) is formed.

In another aspect of the present invention, the room (<NUM>) is provided in the incised surface (<NUM>) while being spaced at a predetermined distance apart from the slit (<NUM>), an auxiliary slit (<NUM>) is formed in the room (<NUM>) to pass therethrough to communicate with the suction body (<NUM>), and a pattern roller (<NUM>) is mounted in the room (<NUM>) to rotate in place while partially protruding outward from the incised surface (<NUM>) so as to form patterns on a surface of fleeces F which have passed through the slit (<NUM>).

An outer surface of the pattern roller (<NUM>) may include at least one of patterns including splines formed to be lengthwise in a longitudinal direction of the pattern roller (<NUM>) while each spline is cut to a certain length, patterns including several annular protrusions formed at predetermined intervals on an outer circumference of the pattern roller (<NUM>), spline-shaped patterns formed to be lengthwise in the longitudinal direction of the pattern roller (<NUM>), and lattice-shaped patterns including repeated uneven parts.

Hereinafter, an exemplary embodiment of the present invention will be described in detail with reference to the attached drawings. Before this, the terms used in the specification and the claims should not be limited to general or lexical meanings and should be interpreted as meanings and concepts coinciding with the technical concept of the present invention on the basis of a principle in which the inventor can appropriately define the concept of the terms to describe the invention in the best manner.

Accordingly, since the embodiment disclosed in the specification and components shown in the drawings are merely one of most exemplary embodiments of the present invention and do not represent an entirety of the technical concept of the present invention, it should be understood that a variety of equivalents and modifications capable of substituting the embodiments and the components may be present at the time of filing of the present application.

A backwash suction device of a fibrous filter according to Embodiment <NUM> of the present invention includes a suction body <NUM> and a suction plate <NUM> in which a slit <NUM> is formed as shown in <FIG>.

Particularly, the suction plate <NUM> includes an incised surface <NUM> formed by cutting one surface of outer surfaces to a predetermined thickness W on the basis of the slit <NUM> so that a space between a disc-type filter D and the suction plate <NUM> which increases by the thickness W may be secured in which fleeces F which have been backwashed in the slit <NUM> forms patterns on a fleece surface.

Here, a room <NUM> is formed by cutting a part of a thickness of the slit <NUM> in the incised surface <NUM> and a pattern roller <NUM> rotating in place is mounted in the room <NUM> so that certain patterns are formed on the surface of the fleeces F between the suction plate and the disc-type filter D using an outer circumferential surface of the pattern roller <NUM> to increase a filtration area of the fleeces F accordingly.

Also, the pattern roller <NUM> is formed to partially protrude outward from the incised surface <NUM> so as to easily and precisely form the patterns with respect to the surface of the fleeces F between the incised surface <NUM> and the disc-type filter D.

Meanwhile, a variety of shapes of patterns may be formed on the surface of the fleeces F on an outer circumference of the pattern roller <NUM>. Basically, spline-shaped uneven parts are formed lengthwise to form a spline cut with a predetermined length. In addition, as examples of patterns of the pattern roller <NUM>, there are patterns in which annular protrusions are formed at predetermined intervals on the outer circumference of the pattern roller <NUM>, patterns in which several strands of uneven parts are repeatedly formed like forming a spline in a longitudinal direction on the outer circumference of the pattern roller <NUM>, and patterns in which lattice-shaped uneven parts are repeatedly formed. However, one type of patterns or a combination of two or more patterns may be formed.

Hereinafter, the above components will be described in detail with reference to the attached drawings. Here, reference symbol D refers to a disc-type filter used in a fibrous filter and reference symbol F refers to fleeces formed on the disc-type filter D to substantially filter out foreign matter stuck thereto.

As shown in <FIG>, the suction body <NUM> may be formed to have a container shape so as to discharge foreign matter suctioned in through the suction plate <NUM> which will be described below and separated from the fleeces F outward from a septic tank. Accordingly, the suction body <NUM> includes a drain hole <NUM> configured to discharge the foreign matter separated from the fleeces F outward from the suction body <NUM>. A pump or the like (not shown) is connected to the drain hole <NUM> so as to drain a fluid with the foreign matter in the suction body <NUM> outward from the septic tank.

The suction body <NUM> is formed to have a length that is approximately a radius of the disc-type filter D so as to install the suction body <NUM> according to the present invention in a radial direction of the disc-type filter D rotating in place in the septic tank. Accordingly, the suction plate <NUM> mounted on the suction body <NUM>, which will be described below, is pressed against a surface of the disc-type filter D rotating in place so as to perform backwashing.

As shown in <FIG>, the suction plate <NUM> closes an open inlet portion of the suction body <NUM>. Also, the suction plate <NUM> is pressed against the surface of the disc-type filter D so as to allow the fleeces F forming the surface of the disc-type filter D to be suctioned in the suction body <NUM> to be backwashed. Also, since the pattern roller <NUM> which will be described below is mounted on the suction plate <NUM> so as to form predetermined patterns on the surface of the fleeces F which have been backwashed through the slit <NUM>, a filtration area of the fibrous filter is increased and thus filtration efficiency is further increased.

As shown in <FIG>, the suction plate <NUM> includes the slit <NUM>, the room <NUM>, and the incised surface <NUM>.

As shown in <FIG>, the slit <NUM> is formed lengthwise in one surface of the suction plate <NUM> along a longitudinal direction. Here, since the slit <NUM> is formed with a length of approximately a radius of the disc-type filter D, the slits <NUM> are disposed to face each other in a radial direction so as to allow the fleeces F formed on the surface of the disc-type filter D to be suctioned in the slit <NUM> according to rotation of the disc-type filter D to perform a backwash of removing foreign matter stuck to the fleeces F.

In an exemplary embodiment of the present invention, although one slit <NUM> is shown as being formed on the suction plate <NUM>, as an example, in <FIG>, it should be easily seen by those skilled in the art that two or more slits may be formed.

As shown in <FIG>, the incised surface <NUM> is formed on an outer surface of the suction plate <NUM>, that is, a surface exposed outward when the suction plate <NUM> is mounted on the suction body <NUM>. Here, the incised surface <NUM> is formed by cutting any one of both surfaces on the basis of the slit <NUM>, and most preferably, a surface surpassed by the fleeces F which have been backwashed in the slit <NUM> with the predetermined thickness W. That is, since the suction plate <NUM> is installed to be almost pressed against the disc-type filter D, the fleeces F before being backwashed in the slit <NUM> are laid flat due to a narrower pre-gap a between the suction <NUM> and the disc-type filter D. Accordingly, in the present invention, since the incised surface <NUM> is formed to have the certain thickness W as described above, a post-gap b between the incised surface <NUM> and the disc-type filter D is wider than the pre-gap by as much as the thickness W of the incised surface <NUM>. The post-gap b provides an adequate space for easily forming patterns when the pattern roller <NUM> which will be described below forms the patterns on the surface of the fleeces F.

As shown in <FIG>, the room <NUM> is formed by cutting a part of the thickness of the slit <NUM> in which the incised surface <NUM> is formed. Here, the pattern roller <NUM> which will be described below is mounted in the room <NUM> and is formed to have a size so as to naturally rotate in place without interference between the pattern roller <NUM> and other components while the pattern roller <NUM> rotates in place and forms the patterns on the surface of the fleeces F.

In an exemplary embodiment of the present invention, as shown in <FIG>, the room <NUM> is formed to be parallel to the slit <NUM> so that the patterns may be formed with respect to the fleeces F withdrawn from the slit <NUM> after being backwashed.

As shown in <FIG>, the pattern roller <NUM> is mounted in the room <NUM> to rotate in place on the basis of a shaft <NUM>'. Here, since the pattern roller <NUM> includes predetermined patterns on the outer circumference thereof, the patterns are formed on the surface of the fleeces F of the disc-type filter D rotating while being pressed against the pattern roller <NUM> and a surface area of the surface of the fleeces F, that is, the filtration area, is increased accordingly so that filtration efficiency of the disc-type filter D may be increased. Here, the surface of the fleeces F refers to a surface formed of the fleeces F which are backwashed while being laid aside between the suction plate <NUM> and the disc-type filter D and passing through the slit <NUM> and then collapsing as one flat surface while moving into a space between the suction plate <NUM> and the disc-type filter D.

The outer circumference of the pattern roller <NUM> is configured to form a variety of shapes of patterns on the surface of the fleeces F as shown in <FIG>. For example, the patterns include spline-shaped uneven parts as shown in <FIG> while the patterns may be formed so that splines are cut with a predetermined length or the patterns may be formed as a vertically lengthwise groove using annular protrusions formed on the outer circumference of the pattern roller <NUM> at predetermined intervals as shown in <FIG>. Also, several strands of uneven parts may be repeatedly formed like forming splines on the outer circumference of the pattern roller <NUM> in a longitudinal direction as shown in <FIG> or lattice-shaped uneven parts may be repeatedly formed as shown in <FIG>. However, it may be easily seen by those skilled in the art that one of these patterns may be used or a combination of two or more of the patterns may be used. Also, a variety of additional patterns may be formed on the outer circumference of the pattern roller <NUM>.

Meanwhile, in an exemplary embodiment of the present invention, as shown in <FIG>, the pattern roller <NUM> may be mounted in the room <NUM> to partially protrude outward further than the incised surface <NUM>. This is to further increase the filtration area by forming the predetermined patterns to be deep in the surface of the fleeces F which are backwashed in the slit <NUM> and then surpassing the incised surface <NUM> using the pattern roller <NUM> protruding further than the incised surface <NUM>.

In the present invention, since the pattern roller rotating in place is mounted on the incised surface formed in the surface of the suction plate surpassing the slit, the fleeces which are backwashed in the slit surpasses the pattern roller, and the predetermined patterns are formed thereon between the incised surface and the disc-type filter so that the filtration area of the fibrous filter is increased accordingly using the patterns formed on the fleece surface as the fleeces pass the suction plate and thus a filtration effect is increased.

Also, since the filtration area is increased, suspended matter may be further removed accordingly. In another aspect, in comparison to related arts, a volume of a filter is reduced and a site necessary for installation is made smaller.

As shown in <FIG> and <FIG>, a backwash suction device of a fibrous filter according to Embodiment <NUM> of the present invention has the same components as in Embodiment <NUM> but has a slight difference in components of the room <NUM>. Hereupon, a detailed description on the same components as those of Embodiment <NUM> will be omitted and only differences will be described herein.

In Embodiment <NUM>, as shown in <FIG> and <FIG>, like Embodiment <NUM>, the room <NUM> in which the pattern roller <NUM> is mounted is formed in the incised surface <NUM> formed in any one side of the suction plate <NUM> exposed outward on the basis of the slit <NUM>. Here, the room <NUM> is formed to be spaced at a predetermined interval apart from the slit <NUM> and an auxiliary slit <NUM> is formed in the room <NUM> to pass therethrough to communicate with an inside of the suction body <NUM>.

Like Embodiment <NUM>, the room configured as described above also allows the patterns to be formed on the fleece surface backwashed in the slit and hung across a part of the incised surface between the slit and the room using the pattern roller mounted in the room so as to increase the filtration area of the disc-type filter.

Claim 1:
A backwash suction device for a disc-shaped fibrous filter including fleeces (F) on a surface of the disc-shaped filter (D), comprising:
- a suction body (<NUM>) having a container shape and including a drain hole (<NUM>) to discharge content from inside the suction body (<NUM>) outward; and
- a suction plate (<NUM>) mounted in the suction body (<NUM>) to close an inlet part thereof and to be installed, in use, to be almost pressed against the disc-shaped filter (D), the suction plate (<NUM>) including a slit (<NUM>) formed on an outer surface of the suction plate (<NUM>) which is exposed outward to perform backwash of the fleeces (F) on the disc-shaped filter (D);
characterized in that an incised surface (<NUM>) is formed in the suction plate (<NUM>) by cutting to a predetermined thickness (W) one side of the outer surface on the basis of the slit (<NUM>) that is surpassed by the fleeces (F) which have been backwashed in the slit (<NUM>), in that a room (<NUM>) is provided in the incised surface (<NUM>), and a pattern roller (<NUM>) is mounted in the room (<NUM>) to rotate in place while being partially exposed and protruding outward from the incised surface (<NUM>) so as to form patterns on a surface of fleeces (F) which have passed through the slit (<NUM>), and in that the incised surface (<NUM>) is formed such that, when the suction plate (<NUM>) is installed to be almost pressed against the disc-type filter (D), a post-gap (b) between the incised surface (<NUM>) and the disc-type filter (D) is wider than a pre-gap (a) between the outer surface of the suction plate (<NUM>) and the disc-type filter (D) before the slit (<NUM>) by as much as the thickness (W).