KR102501533B1 - A back washing type water purifier - Google Patents

Abstract

The present invention relates to a body housing in which an inlet and an outlet are formed, a plurality of filter members provided inside the body housing and filtering water flowing through the inlet, and fixing upper and lower ends of the plurality of filter members inside the body housing, respectively. and a filter fixing part forming a communication hole communicating with the upper and lower ends of the plurality of filter members, respectively, and provided to be connected to at least one of the plurality of filter members through the communication hole, and supplying washing water for backwashing to the connected filter member. Provided is a backwash type filtration device including a backwashing nozzle unit for flowing and a nozzle connecting member provided in the backwashing nozzle unit and selectively bonding the backwashing nozzle unit to a filter fixing unit using magnetic force.

Description

Backwashing type filtration device {A BACK WASHING TYPE WATER PURIFIER}

The present invention relates to a backwashing type filtering device, and more particularly, to a backwashing type filtering device capable of backwashing a filter member using washing water.

In general, a ballast tank capable of storing ballast water is installed in a ship to adjust the balance and draft of the ship.

In addition, a filtering device capable of filtering foreign substances contained in the water is provided in the inlet area where the water used as ballast water in the ballast tank is introduced, and the water flowing into the ballast tank is filtered through the filtering device, so that the ballast tank When ballast water is leaked inside, it is possible to prevent damage to the ecosystem due to the leakage of foreign substances such as organisms and organic substances to the outside.

Conventional filtering devices have a plurality of filter members inside the housing, and when water flows in through an inlet formed in the housing, foreign substances contained in the water are filtered through the filter member and discharged through the outlet of the housing.

In addition, in order to remove foreign substances attached to the filter member, backwashing of the filter member may be performed. In the backwashing process of the filter member, a backwash nozzle is connected to the filter member to introduce high-pressure washing water into the filter member. By doing so, the filter member can be washed.

However, in the case of the conventional backwashing type filtration device, a gap may occur between the backwashing nozzle and the filter member due to the pressure of the washing water, and as a result, backwashing efficiency decreases and foreign substances leak out.

Publication No. 2017-0050710 (Publication date: 2017.05.11) "Ballast water filtering device"

In the present invention, a backwashing type filtering device, specifically, when backwashing the filter member, the backwashing nozzle unit that flows the washing water for backwashing to the filter member is firmly bonded to the filter member, so that the backwashing nozzle unit and the filter member It is an object of the present invention to provide a backwashing type filtering device that can effectively prevent separation from occurring at a connection portion.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

In order to solve the problems described above, the present invention provides a body housing in which an inlet and an outlet are formed, a plurality of filter members provided inside the body housing and filtering water flowing through the inlet, and a plurality of filter members inside the body housing. It is provided to be connected to at least one of the plurality of filter members through a filter fixing part and a communication hole for fixing the upper and lower ends of the filter member of the, respectively, and forming a communication port communicating with the upper and lower ends of the plurality of filter members, respectively, A backwashing type including a backwashing nozzle part for flowing washing water for backwashing with a connected filter member and a nozzle connecting member provided in the backwashing nozzle part and selectively bonding the backwashing nozzle part to the filter fixing part using magnetic force. Provides a filtration device of.

In addition, the filter fixing part is formed in the form of a plate body to seal the lower part of the main body housing, and is provided on a lower plate having a communication hole coupled to communicate with the lower ends of the plurality of filter members on the plate surface and an upper part of the inner side of the main housing, Provided is a backwash type filtering device including an upper plate in which a communication hole coupled to communicate with the upper end of a plurality of filter members is formed.

In addition, the backwashing nozzle unit is rotatably provided inside the main body housing, and selectively provides an upper nozzle and a lower nozzle that are respectively connected to the upper and lower ends of a filter member requiring backwashing among a plurality of filter members through a communication hole. Including, provides a backwash type filtering device provided with a nozzle connecting member at the ends of the upper nozzle and the lower nozzle, respectively.

In addition, the nozzle connection member is coupled to communicate with the ends of the upper nozzle and the lower nozzle, respectively, and the upper close cover, the lower close cover, the upper close cover, and the lower close close cover are provided to be in close contact with the communication hole of the corresponding filter fixing part. Electromagnets provided respectively and attaching the upper and lower close-contact covers to the upper plate and the lower plate so as to adhere to the communication holes corresponding to the upper and lower ends of the filter member requiring back-washing by generating magnetic force during back-washing of the filter member A backwash type filtration device comprising a member is provided.

In addition, the nozzle connection member provides a backwash type filtering device further including an elastic support member providing an elastic force so that at least one of the upper close cover and the lower close cover is closely pressed against the corresponding upper plate or lower plate.

In addition, the elastic support member is provided between the lower nozzle and the lower close cover, and is provided on a fastening pin fastened to a flange formed on the lower nozzle, a fastening pin coupled to the fastening pin and guiding the movement of the lower close cover, and a fastening pin Provided is a back-washing type filtering device including a spring that elastically supports the lower close cover so as to closely press the lower plate.

In the backwashing type filtering device according to an embodiment of the present invention, a nozzle connection member having a magnetic attachment method is provided at the nozzle ends of an upper nozzle and a lower nozzle for flowing high-pressure washing water to the filter member, so that during backwashing of the filter member, , Through the nozzle connection member, the upper nozzle and the lower nozzle can be firmly attached to the upper plate and the lower plate formed with communication ports communicating with the corresponding filter member, so that the upper nozzle or It is possible to effectively prevent the lower nozzle from being separated or separated from the communication hole.

In addition, it is possible to improve the efficiency of backwashing of the filter member by suppressing the phenomenon in which the upper nozzle or the lower nozzle is separated from the communication hole, and is configured to firmly connect the upper nozzle and the lower nozzle and the filter member without a gap without precise processing. Productivity improvement and cost reduction of the filtration device can be promoted.

The effects obtainable in the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. will be.

1 is a cross-sectional view showing the internal configuration of a backwash type filtering device according to an embodiment of the present invention.
Figure 2 shows a lower structure in the filtering device according to an embodiment of the present invention.
Figure 3 shows the upper structure in the filtering device according to an embodiment of the present invention.
4 is a cross-sectional view of a lower nozzle and a first nozzle connection member according to an embodiment of the present invention.
5 is a cross-sectional view of an upper nozzle and a second nozzle connection member according to an embodiment of the present invention.
6 illustrates a process of backwashing a filter member according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

The detailed description set forth below in conjunction with the accompanying drawings is intended to describe exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced.

In order to clearly describe the present invention in the drawings, parts irrelevant to the description may be omitted, and the same reference numerals may be used for the same or similar components throughout the specification.

In embodiments of the present invention, expressions such as “or” and “at least one” may represent one of the words listed together, or a combination of two or more.

1 is a cross-sectional view showing the internal configuration of a backwash type filtering device 100 according to an embodiment of the present invention, and FIG. 2 is a lower structure in the filtering device 100 according to an embodiment of the present invention. 3 shows an upper structure in the filtering device 100 according to an embodiment of the present invention.

The backwash type filtering device 100 according to an embodiment of the present invention is a device for filtering foreign substances contained in water such as seawater or freshwater supplied to a ballast tank through a plurality of filter members 120 As such, it is possible to effectively remove foreign substances adhering to the filter member 120 through backwashing as necessary, thereby improving the filtration efficiency of the filter member 120 .

Referring to FIGS. 1 to 3 , the backwashing type filtering device 100 according to an embodiment of the present invention includes a body housing 110, a plurality of filter members 120, a filter fixing part 130, and a backwashing It may include a nozzle unit 140 and a nozzle connecting member 200 .

The body housing 110 is formed in a tubular shape to form the exterior of the filtering device 100, and an inlet 111 through which water flows in is formed on one side of the side, and an outlet through which the water introduced into the inside is discharged on the other side of the side ( 112) can be formed.

As an example, the main body housing 110 may be installed in an inlet region of a ballast tank provided in a ship, and water may be introduced into the main housing 110 by a pump installed inside the ballast tank. there is.

In addition, a washing water supply pipe 10 for supplying washing water for washing the filter member 120 is provided at the upper part of the main housing 110, and the washing water for washing the filter member 120 is provided at the lower part of the main housing 110. A washing water discharge pipe 20 may be provided.

Here, a valve (not shown) capable of selectively blocking the supply of washing water may be provided on the washing water supply pipe 10 so as to wash the filter member 120 as needed.

The plurality of filter members 120 may be provided inside the body housing 110 to filter water introduced through the inlet 111 of the body housing 110 .

At this time, the plurality of filter members 120 may be radially disposed within the body housing 110, and each may be vertically installed.

In addition, each filter member 120 may be formed in a pipe shape with an upper end closed and a lower end open, and a plurality of filter holes are formed on the outer circumferential surface to filter and discharge water introduced into the inside through the opened lower end. It can be.

Furthermore, a filter element may be provided inside the filter member 120, and fine foreign substances included in water may be easily filtered through the filter element.

In addition, each filter member 120 may be accommodated in the hollow filter housing 123 and installed in the filter fixing part 130 .

The filter fixing part 130 is provided inside the body housing 110 to fix upper and lower ends of the plurality of vertically disposed filter members 120 .

In addition, communication ports 132 and 134 communicating with upper and lower ends of the plurality of filter members 120 may be formed in the filter fixing part 130 .

Specifically, the filter fixing part 130 includes a lower plate 131 provided on the inner lower portion of the body housing 110 to fix the lower ends of the plurality of filter members 120 and an upper portion of the inner body housing 110. It may include an upper plate 133 for fixing the upper ends of the plurality of filter members 120.

At this time, as shown in FIG. 2, the lower plate 131 is formed in the form of a plate body to seal the lower part of the body housing 110, and the lower end of the plurality of filter members 120 is seated and coupled to the plate surface. A first communication hole 132 may be formed.

Here, the first communication hole 132 may be formed to communicate with the opened lower end of the filter member 120, has a diameter corresponding to the lower end of the filter member 120, and has a lower end of the filter member 120 at the edge. A step (132a, see FIG. 4) to which this is coupled may be formed.

In addition, as shown in FIG. 3, the upper plate 133 may be disposed at a predetermined height from the lower plate 131, and the second communication port is located on the plate surface at a portion corresponding to the upper end of the plurality of filter members 120. (134) may be formed.

Here, the second communication port 134 may be formed in the filter member 120 with a larger diameter than the upper end.

In addition, a fixing piece 135 may be formed to cross the center of the second communication port 134, and the fixing piece 135 may have an upper end of the filter member 120 fastened to the fixing piece 135. An upper end of the filter member 120 may be fixed to the fixing piece 135 by fastening a fastening member 136 such as a bolt.

In addition, a plurality of vertical supports (not shown) may be installed on the upper surface of the lower plate 131 to support the upper plate 133 spaced apart from the lower plate 131 .

At this time, an auxiliary plate 133a may be coupled to the bottom surface of the upper plate 133, and the auxiliary plate 133a may be connected to an upper end of a plurality of vertical supports (not shown) to support the upper plate 133. .

In addition, the upper plate 133 and the lower plate 131 described above may be coated with a material having corrosion resistance or a material having corrosion resistance, and may be detachable from the electromagnet member provided in the nozzle connecting member 200 described later. It may be made of a metal material or the like.

In the filtering device 100 having such a configuration, when water flows in through the inlet 111 of the main housing 110, the inflowed water passes through the first communication port 132 of the lower plate 131 to the filter member ( 120) to flow to the opened lower end of the filter member 120 to be filtered by the filter medium and the filter hole, and the filtered water is discharged through the outlet 112 of the body housing 110 and introduced into the ballast tank. there is.

Meanwhile, the backwashing nozzle unit 140 is provided to be connected to at least one of the plurality of filter members 120, so that washing water for backwashing may flow through the connected filter member 120.

The backwashing nozzle unit 140 includes a lower nozzle 141 provided to be connected to the lower end of the filter member 120 through the first communication hole 132 of the lower plate 131 and an upper plate 133. It may include an upper nozzle 145 provided to be connected to the upper end of the filter member 120 through the second communication hole 134, and the upper nozzle 145 and the lower nozzle 141 are inside the body housing 110. It is rotatably provided in the filter member 120 and can be selectively connected to the upper and lower ends of one filter member 120 requiring backwashing among the plurality of filter members 120 .

Specifically, the rotating shaft 113 may be provided vertically at the inner center of the main housing 110, the upper nozzle 145 is coupled to the upper portion of the rotating shaft 113, and the lower nozzle is coupled to the lower portion of the rotating shaft 113 ( 141) can be combined.

Here, the rotating shaft 113 may be rotated by a motor drive, and the upper nozzle 145 and the lower nozzle 141 rotate around the rotating shaft 113 to rotate one of a plurality of filter members 120 arranged radially. can optionally be connected to

The nozzle connecting member 200 is provided in the backwashing nozzle unit 140, and selectively bonds the backwashing nozzle unit 140 to the communication ports 132 and 134 of the filter fixing unit 130 using magnetic force. can make it

The nozzle connecting member 200 may include a first nozzle connecting member 210 coupled to the lower nozzle 141 and a second nozzle connecting member 220 coupled to the upper nozzle 145 .

4 is a cross-sectional view of a lower nozzle 141 and a first nozzle connecting member 210 according to an embodiment of the present invention, and FIG. 5 is an upper nozzle 145 and a second nozzle according to an embodiment of the present invention. 2 shows the nozzle connection member 220 in cross-section.

Referring to FIG. 4, the lower nozzle 141 includes a lower connection pipe 142 having an upper part coupled to the rotary shaft 113 and a lower part connected to the washing water discharge pipe 20 (see FIG. 1), and the lower connection pipe 142. It may include a first nozzle tube 143 extending upward from the side.

Here, the lower connection pipe 142 and the first nozzle pipe 143 are formed to communicate, and a flange 144 to which the first nozzle connecting member 210 is coupled is formed around an end of the first nozzle pipe 143. It can be.

Specifically, the first nozzle connection member 210 is provided to communicate with the end of the first nozzle pipe 143 and is provided to be in close contact with the first communication port 132 of the lower plate 131 lower close cover 211 And, a plurality of elastic support members 212 coupled to the flange 144 of the first nozzle pipe 143 and elastically supporting the lower close contact cover 211, and a first electromagnet member provided on the lower close close cover 211 (216).

At this time, the lower close contact cover 211 may be formed in the form of a ring having a penetrating inside and coupled to an end of the first nozzle pipe 143 .

The lower close contact cover 211 is coupled to the first nozzle pipe 143 and has an upper surface in close contact with the lower surface of the lower plate 131. It may be provided in close contact with one of the plurality of first communication holes 132 formed in the lower plate 131 according to rotation.

In addition, the elastic support member 212 is provided in plurality and can be coupled to a plurality of fastening holes formed in the flange 144 of the first nozzle pipe 143, respectively, and is provided with a spring 215 to form a lower close contact cover 211 ) can be elastically supported.

Such an elastic support member 212 includes a fastening pin 213 fastened to a fastening hole formed in the flange 144 and a fastening pin coupled to the fastening pin 213 and guiding the movement of the lower close cover 211 ( 214) and a spring 215 provided on the fastening pin 213 to elastically support the lower close contact cover 211.

Here, the coupling pin 214 may pass through the lower close contact cover 211 and be coupled to the top of the fastening pin 213, and a stopper may be formed at the top.

In addition, the spring 215 is inserted into the fastening pin 213 as a coil spring so that the lower portion is supported by the flange 144 and the upper portion may be supported by the lower close contact cover 211 .

Accordingly, the elastic support member 212 may elastically support the lower contact cover 211 through the spring 215 by pressing the lower contact cover 211 in close contact with the lower surface of the lower plate 131 .

The first electromagnet member 216 provided on the lower close contact cover 211 may be provided above or inside the edge of the lower close close cover 211, and may selectively generate magnetic force to be attached to the lower plate 131. .

At this time, the first electromagnet member 216 can be turned on / off under the control of a control unit (not shown) for operating the filtering device 100, and the lower close contact cover 211 is the first of the lower plate 131. When connected to the communication hole 132, a magnetic force may be generated so as to be attached to the lower plate 131.

Referring to FIG. 5, the upper nozzle 145 includes an upper connection pipe 146 having a lower part coupled to the rotary shaft 113 and an upper part connected to the washing water supply pipe 10 (see FIG. 1), and the upper connection pipe 146. A second nozzle tube 147 extending downward from the side surface may be included.

In addition, a second nozzle connection member 220 may be coupled to an end of the second nozzle pipe 147 .

Specifically, the second nozzle connection member 220 is provided to communicate with the end of the second nozzle pipe 147 and is provided to be in close contact with the second communication hole 134 of the upper plate 133, the upper close cover 221 And, it may include a second electromagnet member 222 provided on the upper close contact cover (221).

Here, the upper close contact cover 221 is formed in the form of a ring having a penetrating inside and can be coupled to the end of the second nozzle pipe 147, and the lower surface is provided so as to be in close contact with the upper surface of the upper plate 133 , It may be provided in close contact with one of the plurality of second communication holes 134 formed in the upper plate 133 according to the rotation of the upper nozzle 145 rotating around the rotation shaft 113 as an axis.

In addition, the second electromagnet member 222 may be provided under or inside the edge of the upper close contact cover 221, and may selectively generate magnetic force to be attached to the upper plate 133.

At this time, the second electromagnet member 222 may operate simultaneously with the first electromagnet member 216 under the control of the control unit for operating the filtering device 100, and the upper close cover 221 is the upper plate 133 When connected to the second communication port 134, magnetic force may be generated so as to be attached to the upper plate 133.

In addition, in the above-described embodiment, the upper close contact cover 221 of the second nozzle connecting member 220 is provided in close contact with the upper surface of the upper plate 133 at the upper side of the upper plate 133, so that a separate elastic support member is provided. It may not be provided, but the present invention is not necessarily limited thereto, and may be configured in the same manner as the first nozzle connection member and include an elastic support member.

In the backwashing type filtering device 100 according to the present embodiment, when the filter member 120 is backwashed, the rotary shaft 113 is rotated to separate the upper nozzle 145 and the lower part of the backwash nozzle unit 140. The nozzle 141 may be connected to the communication ports 132 and 134 of the filter fixing part 130 communicating with the upper and lower ends of the filter member 120 requiring backwashing, respectively. At this time, the upper nozzle 145 and the lower nozzle The upper nozzle 145 and the lower nozzle 141 can be firmly attached to the corresponding upper plate 133 and lower plate 131 through the nozzle connecting member 200 provided at the nozzle end of the 141, and the filter In the process of back-washing the member 120, it is possible to prevent the upper nozzle 145 or the lower nozzle 141 from being separated or separated from the communication ports 132 and 134 by high-pressure washing water.

Hereinafter, with reference to FIGS. 1 and 6 , a foreign material filtering process and a backwashing process of the filter member 120 according to the operation of the backwashing type filtering device 100 according to an embodiment of the present invention will be described.

6 illustrates a process of backwashing the filter member 120 according to an embodiment of the present invention.

Referring to FIG. 1, in the process of filtering foreign substances contained in water such as seawater or fresh water supplied to a ballast tank, water may be introduced through the inlet 111 of the main housing 110, The inflowed water flows through the plurality of first communication holes 132 of the lower plate 131 to the opened lower end of the filter member 120, and is filtered while passing through the filter medium and the filter hole of the filter member 120, and It can be discharged through the outlet 112 of (110).

Meanwhile, referring to FIG. 6 , when backwashing the filter member 120 is performed, the upper nozzle 145 and the lower nozzle 141 of the backwash nozzle unit 140 are rotated by rotating the rotary shaft 113 through a motor. ) may be connected correspondingly to the communication ports 132 and 134 of the filter fixing part 130 communicating with the upper and lower ends of the filter member 120 requiring backwashing, respectively.

At this time, the first nozzle connection member 210 provided in the first nozzle pipe 143 of the lower nozzle 141 may be connected to correspond to the first communication hole 132 of the lower plate 131 so as to be in close contact with each other, , The second nozzle connection member 220 provided in the second nozzle tube 147 of the upper nozzle 145 may also be connected to the second communication hole 134 of the upper plate 133 in close contact with each other.

In addition, the electromagnet members 216 and 222 respectively provided in the first nozzle connecting member 210 and the second nozzle connecting member 220 operate, and the first nozzle connecting member 210 is attached to the lower plate 131 by magnetic force. It may be attached, and the second nozzle connecting member 220 may also be attached to the upper plate 133.

Thereafter, by flowing the washing water into the upper nozzle 145 through the washing water supply pipe 10, the washing water may flow into the filter member 120 through the upper nozzle 145 and pass through the second communication port 134. there is.

At this time, the washing water introduced through the second communication port 134 is introduced into the filter housing 123 through a plurality of filter holes 121 formed on the outer circumferential surface of the corresponding filter member 120 and flows into the filter member 120. , It is possible to remove foreign substances attached to the inner surface of the filter member 120, and also removes fine foreign substances attached to the filter element 122 inside the filter member 120, thereby removing the corresponding filter member 120. can be washed

In addition, washing water containing foreign substances that washed the corresponding filter member 120 may be discharged through the lower nozzle 141 to the washing water discharge pipe 20 (see FIG. 1).

In the backwashing process of the filter member 120, high-pressure washing water is introduced into the filter member 120, and the pressure of the washing water causes the lower nozzle 141 to move through the first communication port 132 of the lower plate 131. ), or the upper nozzle 145 may be separated from the second communication hole 134 of the upper plate 133. In this embodiment, when backwashing the filter member 120, the lower nozzle 141 and The lower nozzle 141 and the upper nozzle 145 can be firmly attached to the corresponding lower plate 131 and upper plate 133 through the nozzle connecting member 200 provided at the nozzle end of the upper nozzle 145, respectively. there is.

As described above, in the backwashing type filtration device 100 according to an embodiment of the present invention, the nozzle ends of the upper nozzle 145 and the lower nozzle 141 flow high-pressure washing water to the filter member 120. is provided with a nozzle connection member 200 of a magnetic attachment method, so that when the filter member 120 is back-washed, the upper nozzle 145 and the lower nozzle 141 are connected through the nozzle connection member 200 to the corresponding filter member ( 120) can be firmly attached to the upper plate 133 and the lower plate 131 on which the communication ports 132 and 134 are formed, and the upper nozzle 145 Alternatively, a phenomenon in which the lower nozzle 141 is spaced apart or separated from the communication ports 132 and 134 can be effectively prevented.

In addition, the separation of the upper nozzle 145 or the lower nozzle 141 from the communication holes 132 and 134 can be suppressed to improve the backwashing efficiency of the filter member 120, and the upper nozzle 145 and Since the lower nozzle 141 and the filter member 120 are configured to be firmly connected without a gap, productivity of the filtering device 100 may be improved and costs may be reduced.

Embodiments of the present invention disclosed in this specification and drawings are only presented as specific examples to easily explain the technical content of the present invention and help understanding of the present invention, and are not intended to limit the scope of the present invention.

Therefore, the scope of the present invention should be construed as including all changes or modifications derived based on the technical idea of the present invention in addition to the embodiments disclosed herein.

100: backwash type filtration device 110: body housing
120: filter member 130: filter fixing part
131: lower plate 132: first communication port
133: upper plate 134: second communication port
140: backwash nozzle part 141: lower nozzle
145: upper nozzle 200: nozzle connecting member
210: first nozzle connection member 211: lower close contact cover
212: elastic support member 216: first electromagnet member
220: second nozzle connection member 221: upper close contact cover
222: second electromagnet member

Claims (6)

A body housing in which an inlet and an outlet are formed;
a plurality of filter members provided inside the main housing and filtering water introduced through the inlet;
a filter fixing part fixing upper and lower ends of the plurality of filter members inside the main housing and forming a communication port communicating with the upper and lower ends of the plurality of filter members, respectively;
a backwash nozzle unit connected to at least one of the plurality of filter members through the communication hole, and flowing wash water for backwashing to the connected filter member;
a rotating shaft coupled to the inner center of the main body housing and rotating the backwashing nozzle unit by a motor drive to selectively connect the backwashing nozzle unit to a communication port communicating with a filter member requiring backwashing; and
a nozzle connecting member provided in the backwashing nozzle part and selectively bonding the backwashing nozzle part to the filter fixing part using an electromagnet;
During backwashing of the filter member, the rotating shaft is rotated so that the backwash nozzle part is connected to the communication hole communicating with the filter member requiring backwashing, and the electromagnet is operated so that the backwash nozzle part communicates with the correspondingly connected communication hole. A backwash-type filtering device capable of preventing the backwash nozzle part from being separated or separated from the communication hole by high-pressure washing water by being bonded to the sphere.
According to claim 1,
The filter fixing part,
a lower plate formed in the form of a plate body to seal a lower portion of the main body housing, and having a communication hole coupled to communicate with lower ends of the plurality of filter members on the plate surface; and
A backwash type filtering device comprising an upper plate provided on an upper side inside the main housing and having a communication hole formed on a plate surface coupled to communicate with the upper ends of the plurality of filter members.
According to claim 2,
The backwash nozzle part,
An upper nozzle and a lower nozzle rotatably provided inside the main housing and selectively connected to upper and lower ends of one filter member requiring backwashing among the plurality of filter members through the communication hole, respectively;
A backwash type filtering device in which the nozzle connection members are provided at ends of the upper nozzle and the lower nozzle, respectively.
According to claim 3,
The nozzle connecting member,
an upper close contact cover and a lower close close cover coupled to the ends of the upper nozzle and the lower nozzle to communicate with each other and closely attached to the corresponding communication opening of the filter fixing part; and
The upper close cover and the lower close cover are respectively provided, and when the filter member is back-washed, magnetic force is generated so that the upper and lower ends of the filter member requiring back-washing are in close contact with the communication holes corresponding to the upper close cover and A backwash type filtering device comprising an electromagnet member for attaching the lower close contact cover to the upper plate and the lower plate.
According to claim 4,
The nozzle connecting member,
and an elastic support member providing an elastic force so that at least one of the upper close cover and the lower close cover is pressed in close contact with the corresponding upper plate or lower plate.
According to claim 5,
The elastic support member is provided between the lower nozzle and the lower close contact cover,
A fastening pin fastened to a flange formed in the lower nozzle;
a coupling pin coupled to the fastening pin and guiding movement of the lower close contact cover; and
A backwash type filtering device comprising a spring provided at the fastening pin and elastically supporting the lower close contact cover so as to press the lower close contact cover against the lower plate.

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