KR20170030670A - Strainer having separated screen - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water filtration apparatus, in which a screen is divided into two areas, and then a filtration process and a backwash process are performed. Thus, the area of the entire screen is not reduced, Can also be achieved efficiently. Therefore, it is possible to solve the problem that foreign substances in the screen terminal portion far from the backwash arm are not backwashed properly and the filtration efficiency is inferior. In addition, it is possible to facilitate disassembly and assembly by preventing the backwash arm from being supported by the screen mounting portion, and to prevent the foreign matter of the contaminated water from adhering to the rotary power transmitting portion transmitting the rotational power of the motor when the contaminated water is introduced, A screen is provided.

Description

 [0001] The present invention relates to a screen-

More particularly, the present invention relates to a water filtration apparatus that improves filtration efficiency by separating a screen for filtering polluted water into two areas, and facilitates disassembly and assembly by preventing the backwash arm from being supported by the screen mounting portion The present invention relates to a screen division type water filtration apparatus.

Generally, a strainer (strainer) is a device that filters out organic suspended substances that are introduced and generated in various plant systems, and is widely used for purifying agriculture, industrial water, and the like. In addition, a water filter for filtering polluted cooling water is disposed in the factory to filter a large amount of polluted water and is used to cool products such as steel using filtered water.

The key component for filtering polluted water in a water filter is a screen made in mesh form. That is, when the contaminated water mixed with the foreign substance passes through the screen, the foreign matter is filtered on the screen, and only the filtrate water is discharged through the discharge. In this case, when the filtration is continuously performed, the filtration efficiency may be lowered due to a large amount of foreign substances on the screen. For this purpose, after the predetermined filtration process, the backwashing arm faces the bottom of the screen, Backwash process is done.

On the other hand, in the existing water filtration apparatus, there is a problem that the screen or the filter is formed in a long area in one area, and the foreign substance adhered to the screen is removed in the course of backwashing the screen or filter after filtration.

Also, it is difficult to disassemble or assemble the backwash arm in the water filtration apparatus by using a structure in which a backwashing arm through which backwash water flows is supported on a screen mounting portion where a screen for filtering contaminants or a filter is mounted.

Further, as the contaminated water flows in, the foreign matter is attached horizontally to the rotating shaft which transmits power through the backwashing means.

A related art related to such a water filtration apparatus is Korean Registered Utility Model No. 20-0110358.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the conventional art as described above, and it is an object of the present invention to improve efficiency of filtration and backwashing in comparison with a case where screens are divided into a plurality of areas, .

It is another object of the present invention to facilitate disassembly or assembly of the backwash arm by the water filtration device because the backwash arm is not supported by the screen mounting portion.

Another object of the present invention is to prevent foreign matter contained in the contaminated water from adhering to the rotary power transmitting portion when the contaminated water flows into the water filtering apparatus by installing a foreign matter blocking screen.

To achieve the above object, according to the present invention, there is provided a water filtration apparatus comprising: a contaminated milk inlet to which polluted water flows; a filtered water outlet for discharging filtered water filtered by the foreign polluted water; A casing having a water discharge port; A first screen mounting portion and a second screen mounting portion which are respectively mounted above and below the contaminated feeding inlet on the inside of the casing; A first screen and a second screen which are respectively installed above the first screen mounting portion and below the second screen mounting portion to filter foreign matters from the contaminated water flowing through the contaminated milk inlet; And a backwash arm which is installed between the first screen mounting portion and the second screen mounting portion on the inside of the casing and rotates by receiving a rotational force transmitted from the motor and the backwash arm is rotated through the first screen mounting portion and the second screen mounting portion A backwashing means for guiding reverse water containing foreign matter to the reverse water discharge outlet side by facing the first screen and the second screen; And a lid part on which the motor is mounted while closing or opening the upper part of the casing.

Since the backwashing body includes the backwash body and the backwash water discharge passage, the backwash body is rotatably coupled to the backwashing means discharge chamber provided in the transverse direction toward the center of the casing inside the casing, And the backwash body is sealed from the contaminated water inflow space by the backwash water discharge chamber so that backwash water flowing back into the backwash water discharge passage can be discharged only to the outside without flowing into the casing, do.

Further, a power transmission means is provided to be hung between the motor drive shaft of the motor and the backwash body to supply the power of the motor provided on the side surface of the casing to the backwash body.

In addition, a foreign matter blocking screen is installed in front of the contaminated milk inlet in the casing so as to prevent foreign matter from adhering to the chain that transmits the rotational force of the motor, the contaminated water flowing into the contaminated milk inlet.

The water filtration apparatus according to the present invention has the following effects.

First, the filtration efficiency can be increased while maintaining the total filtration area by dividing the screen. If the screen is long and only in one area, the back end of the screen, which is distant from the backwash arm, may not be backwashed in the process of filtering the contaminated water and backing up the screen. Therefore, if the backwash of the screen is not properly performed, the filtering efficiency will be deteriorated because the foreign matter is not adhered to the screen in the subsequent filtration process. However, in the present invention, since the screens are divided into shorter lengths and are installed in the two regions, the filtration efficiency can be increased while maintaining the overall filtration area, compared with a case where the screen is formed long in one region.

Second, since each screen is formed to have a short length while keeping the total filtration area of the screen at the same, it is possible to significantly reduce the screen drawing space of the casing when the screen is taken out from the casing. Therefore, it is very useful to install a water filtration device in a narrow space such as a ship.

Third, since the backwash arm is not supported on the screen mounting portion, it is easy to disassemble or assemble the backwash arm. In other words, conventionally, there is a device in which a motor is installed at the uppermost part of the casing of the water filtration device, and the power transmission shaft penetrates into the inside thereof and is connected to the back-pressure arm. Even if the motor is not installed at the uppermost part of the casing, there was. Such water filtration devices have a disadvantage in that it is complicated to disassemble the parts between the parts when the backwashing arm is replaced, and furthermore, when the internal parts such as the screen are replaced, and the work of the operator is troublesome and time consuming. The water filtration apparatus according to the present invention does not require the internal back-and-forth arms to be coupled to the reverse water discharge port provided on the side surface of the casing, so that it is not necessary to separately support the internal back-and-forth arms. Accordingly, since only a minimum necessary coupling is possible in the interior, the operator can easily disassemble and assemble the water filtration apparatus. Further, since there is no coupling portion in the screen mounting portion, the filtration space is originally prevented from leaking.

Fourth, the design is simple since the rotating power transmitting portion for transmitting the rotational power by the backwashing means does not have a structure that can be separated and combined. That is, conventionally, since the motor is installed on the upper part of the lid part, and then the rotation shaft is connected to the backward-moving part disposed below the screen mounting part through the filtration space, the rotational force is transmitted. Therefore, . However, in the present invention, since the motor is installed on the side surface of the casing and then the rotating power is transmitted to the backwashing means, even if the lid is opened, the rotating power transmitting portion is not affected and thus complicated design for connection and disconnection of the power transmission is not required .

Fifth, relatively large foreign substances included in the contaminated water that is first introduced into the contaminated feeding inlet are caught by the parts of the rotary power transmitting part, thereby preventing malfunctions in transmitting rotational power or damaging parts related to power transmission It is possible to prevent contaminants from adhering or sticking to the rotary power transmitting portion by providing a contaminant prevention screen for preliminarily filtering a relatively large foreign substance. This is because when the contaminated water is introduced into the contaminated milk inlet, the inside of the casing is directly exposed to the contaminated water, so that the contaminated water may be adhered to or caught in the sprocket and the chain. Attachment of foreign matter to the sprocket and chain may result in failure to properly transfer power to the backwash arm and may eventually lead to machine failure, as delays and damage may occur between precisely interlocked configurations. Therefore, it is possible to prevent contaminants from adhering to the rotating power transmitting portion and the backwash means by installing a pollution preventing screen on the contaminated feeding inlet, and to prevent a machine failure. That is, the contaminant prevention screen does not perform the inherent precise filtration function of the water filtration device but is used to perform preliminary filtration to prevent malfunction or damage of the rotary power transmission portion.

1 is a cross-sectional view schematically showing the interior of a water filtration apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view schematically showing the inside of the water filtration apparatus shown in FIG. 1 from another angle. FIG.
FIG. 3 is a schematic view of the water filtration apparatus shown in FIGS. 1 and 2 viewed from above. FIG.
FIG. 4 is an enlarged perspective view of the reverse water discharge chamber in the water filtration apparatus shown in FIGS. 1 and 2. FIG.
FIG. 5 is a view showing the water withdrawn chamber and the backwash means in the water filtration apparatus shown in FIG. 1 and FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, some configurations which are not related to the gist of the present invention may be omitted or compressed, but the configurations omitted are not necessarily required for the present invention, and they may be combined by a person having ordinary skill in the art to which the present invention belongs. .

FIG. 1 is a cross-sectional view schematically showing the inside of a water filtration apparatus according to an embodiment of the present invention, FIG. 2 is a cross-sectional view schematically showing another inside of a water filtration apparatus shown in FIG. 1, And FIG. 4 is a perspective view in which the reverse water discharge chamber is enlarged in the water filtration apparatus shown in FIGS. 1 and 2, and FIG. 5 is an enlarged perspective view of the water filtration apparatus shown in FIG. And FIG. 2 is a view showing a state in which the reverse water discharge chamber and the backwash means are caught by the catching jaws in the water filtration apparatus shown in FIG.

1 to 5, a screen dividing type water filtering apparatus according to the present invention includes a casing 110, lids 130 and 131, 140, backwash means 150, a first screen 190, a second screen 200, a backwash discharge chamber 165, and a foreign matter screening screen 220.

The casing 110 has an internal space in which other components of the water filtering apparatus 100 are located and can be opened or closed by the lid portions 130 and 131. [ The casing 110 has a contaminated milk inlet 111 through which the contaminated water flows and a filtered water outlet 112 through which the filtered water filtered from the introduced contaminated water is discharged. The casing 110 is partitioned into a plurality of spaces by the first screen mounting portion 170 and the second screen mounting portion 180. The first screen mounting portion 170 is installed inside the casing 110 above the contaminated feeding inlet 111 and the first screen 190 is mounted at a position spaced apart from the center of the first screen mounting portion 170 by the same length The first screen mounting hole 171 is formed. In addition, the first screen mounting portion 170 is fixed above the contaminated feeding inlet 111. When the first screen mounting portion 170 is installed, the upper portion of the first screen mounting portion 170 becomes the first filtering space 113.

The second screen mounting portion 180 is fixed to the lower portion of the contaminated feeding inlet 111 and is disposed at the same distance from the center of the second screen mounting portion 180 as the first screen mounting portion 170, The second screen mounting hole 181 is formed. The second screen mounting portion 180 is fixed to the inner wall surface of the casing 110 and fixed. When the second screen mounting portion 180 is installed, the lower portion of the second screen mounting portion 180 becomes the second filtering space 115. A first discharge hole 114 and a second discharge hole 116 are formed on one side of the first filtration space 113 and the second filtration space 115 to communicate with the filtrate discharge port 113, respectively.

The first screen 190 is installed in the first filtering space 113 to pass polluted water flowing thereinto and to filter out foreign matter. The first screen 190 is mounted on the first screen mounting hole 171 of the first screen mounting portion 170. At this time, a plurality of first screens 190 are installed concentrically with respect to the center of the first screen mounting portion 170. The lower portion of the first screen 190 is in communication with the lower portion of the first screen mounting portion 210 through the first screen mounting hole 171.

The second screen 200 is installed in the second filtering space 115 to filter out foreign matter. The second screen 200 is attached to the second screen mounting hole 181 of the second screen mounting portion 180 and a plurality of the second screen 200 are installed concentrically like the first screen 190.

The lid parts 130 and 131 are coupled to the casing 110 through separate coupling means on both sides of the screens 190 and 200 to close or open the space of the casing 110. [ Typically, when the filtration process is performed, the lid portions 130 and 131 are closed, and when the internal structures are installed and disassembled, the lid portions 130 and 131 are opened. The lids 130 and 131 may be opened to disassemble and assemble internal components, but disassembly and assembly are also possible in the manhole 210. The manhole 210 is located in the center of the device and is configured in the shape of an ellipse so that its size is sufficiently large to allow access to the interior parts so that the backhole means 150 ) Can be easily disassembled and assembled.

The rotary power transmission unit 140 is for transmitting rotational power to the backwash body 151 of the backwashing means 150 and includes a motor 141, a motor reducer 142, a motor rotation shaft 143, a chain 145, A rotation axis fixing portion 146, and a motor rotation axis support bearing 147. [

The motor 141 supplies the necessary power to the backwashing means 150 in backwashing process.

The motor reducer 142 decelerates the power of the motor 141 and transmits power as necessary.

The motor rotation shaft 143 rotates in accordance with the driving of the motor 141 and the chain 145 is connected to the motor sprocket 144 provided on the motor rotation shaft 143.

The chain 145 is connected to the motor sprocket 144 of the motor rotation shaft 143 to transmit the power supplied by the motor 141 to the backwash body 151 of the backwash means 150 through the motor rotation shaft 143.

The motor rotation shaft fixing portion 146 and the motor rotation shaft support bearing 147 serve to fix the motor rotation shaft 143.

The backwashing means 150 is provided for discharging foreign matters caught by the screens 190 and 200 by receiving power from the rotary power transmitting portion 140 and rotating. This backwashing means 150 includes a backwash body 151, a first backwash arm 156, a second backwash arm 160 and a backwash water discharge chamber 165.

The backwash body 151 is located on the rotational center of the backwash means 150. The first backwashing arm seat 153 and the second backwash arm seat 154 are provided on the upper and lower sides as viewed in the drawing. The first backwash arm 156 and the second backwash arm 160 are coupled to the backwash body 151 and the second backwash arm receiving portion 154 of the backwash body 151, The first backwash arm 156 and the second backwash arm 160 are also rotated and the backwash water introduced through each backwash arm can be taken into the backwash body 151. [

1, the first backwash arm 156 shown on the upper right side of the backwash body 151 includes a first reverse water guide portion 157 serving as a passage for guiding the reverse water to the backwash body 151, A first counterflow water inflow section 159, which sequentially faces the first screen 190, is provided at an upper portion of the wash water guide section 157. The first backwash inflow section 159 is provided with a first close contact section 158 which is in close contact with the upper side and a first close contact spring 158a is provided inside the first close contact section 158. The backwash main body 151 is also provided with the reverse water discharge pipe 167 and the discharge chamber cover 165 of the reverse osmissible discharge chamber 165 with the upper and lower ends being spaced apart from the first screen mounting portion 170 and the second screen mounting portion 180, (Not shown).

The second backwash arm 160 shown in the lower right portion of the backwash body 151 is installed to have a symmetrical structure with the first backwash arm 156 and the second backwash arm 160, The description of the reverse water guide portion 161, the second tight contact portion 162, the second tightening spring 162a and the second reverse water inlet portion 163 can be sufficiently inferred from the description of the first reverse oil stroke arm 156 Therefore, the description will be omitted.

The backwash body 151 between the first backwash arm 156 and the second backwash arm 160 is provided with a backwashing means sprocket 152 for receiving power from the rotary power transmission unit 140. The backwashing means sprocket 152 receives the power of the rotary power transmitting portion 140 and rotates the backwashing means 150. [ This power is transmitted to the backwashing means 150 by the power of the motor 141 by the chain 145 connected to the reverse sprocket 152 and the motor sprocket 144.

The backwash water discharge chamber 165 is a chamber for horizontally extending toward the center of the internal space of the casing 110 inside the casing 110 and discharging backwash water to the outside, And a discharge chamber cover 168 is provided on the opposite side of the stationary water discharge port 166. The discharge water discharge port 166 is connected to the discharge water discharge port 166, The discharge chamber cover 168 serves to prevent backwash water flowing through the reverse water discharge pipe 167 from flowing into the casing 110 and to block one side so as to escape to the outside and to support the backwash body 151 . The stationary water discharge passage 155 is completely blocked by the reverse water discharge pipe 167 and the discharge chamber cover 168 from the contaminated water inflow space 111a inside the casing. In addition, the discharge chamber lid 168 can be detached at the reverse water discharge pipe 167 to facilitate disassembly. The backwash water discharge pipe 167 is screwed to the discharge chamber cover 168 with the backwash body 151 interposed therebetween and the backwash main body 151 has the upper and lower chamfering jaws 151a connected to the reverse water discharge pipe 167 And a discharge chamber cover 168 to be rotatably supported by the backwater discharge chamber 165. [ Between the backwash body 151 and the backwash water discharge pipe 167 and the discharge chamber lid 168, sealing means (not shown) for preventing water leakage is mounted. As shown in Fig. 3, the shape of the reverse water discharge pipe 167 extends radially and is fixed to the casing 110. As shown in Fig. This radial configuration helps the configurations of the backwashing means 150 to be supported more firmly. In other words, the components of the backwashing means 150 screwed to the reverse water discharge pipe 167 and hooked to the chamber stopping jaw 151a must be firmly supported and fixed when rotated by the power of the motor 141 in backwashing process Therefore, if the backwash water discharge pipe 167 to which the backwashing means 150 is screwed is firmly fixed to the inner wall of the casing 110 in a radial form, the configurations of the backwashing means 150 can be stabilized. In addition, since the reverse water discharge pipe 167 is radially configured, stable center alignment within the casing 110 is possible.

The foreign matter blocking screen 220 is provided in the contaminated feeding inlet 111 with a foreign matter blocking screen 220 installed at the contaminated feeding inlet 111 when the contaminated water flows into the contaminated feeding inlet 111, Thereby preventing the power transmitting portion 140 and the back-up means 150 from being attached to the back-up means sprocket 152 and the chain 145. The foreign matter blocking screen 220 has a net structure formed with a plurality of 3-15 mm holes, so that the contaminated water can be preliminarily filtered and allowed to flow into the contaminated water inflow space 111a. Also, the foreign matter blocking screen 220 is detachably attached to the blocking screen guide piece 230.

The water filtration apparatus according to the embodiment of the present invention described above will be further described with reference to an operation process.

When the contaminated water flows into the contaminated feeding inlet 111 of the casing 110 by the operation of the pump (not shown), the contaminated water is preliminarily filtered through the foreign matter blocking screen 220, 2 screen mounting portion 180. In this case, The contaminated water is discharged through the first screen mounting hole 171 of the first screen mounting portion 170 and the second screen mounting hole 181 of the second screen mounting portion 180, (200), and foreign materials are filtered while passing through the side surfaces of the screens (190, 200). When the filtered water exits through the screens 190 and 200 into the first filtering space 113 and the second filtering space 115, the filtered water passes through the first exhaust hole 114 and the second exhaust hole 116 And exits to the filtrate discharge port 112.

The foreign matter blocking screen 220 is configured such that when the contaminated water enters into the contaminated feeding inlet 111, foreign matter flows into the rotating power transmitting portion 140 and the backwashing means sprocket 152 of the backwashing means 150 and the chain 145 And can be introduced into the first filtering space 113 and the second filtering space 115 only. In other words, a plurality of holes (not shown) formed on both sides of the foreign matter blocking screen 220 to have a size of 5 mm are formed, so that the contaminated water is filtered first, then the first filtering space 113 and the second filtering space 115, The contaminated water flows into the water tank.

At this time, if the filtration process is continued for a predetermined period of time, the filtration efficiency is reduced due to a large amount of foreign matter trapped inside the screens 190 and 200. Therefore, a backwashing process for removing foreign matter trapped inside the screens 190 and 200 must be performed. The backwashing process is performed according to the operation of the backwashing means 150. That is, when the motor 141 is operated, the motor rotation shaft 143 rotates and the chain 145 connected to the motor sprocket 144 at the end of the motor rotation shaft 143 is returned to the backward means sprocket 152 of the back- So that the backwash body 151 also rotates. In accordance with the rotation of the backwash body 151, the first backwash arm 156 and the second backwash arm 160 also rotate together.

When the first backwash arm 156 rotates, the first tight contact portion 158 maintains a state of being in close contact with the bottom surface of the first screen mounting portion 170 by the elastic force of the first tightening spring 158a, So that the contaminated water can not flow through the inflow section 159. On the other hand, when the first tight contact portion 158 faces the first screen mounting hole 171, the inside of the first screen 190 passes through the first screen mounting hole 171, the first reverse osmosis inflow portion 159, The backwash main body 151, the reverse water discharge pipe 167 and the reverse water discharge outlet 166 are all in a communicated state.

In this state, the inside of the casing 110 maintains a high pressure due to the inflow of the contaminated water, and the outside of the casing 110 is at atmospheric pressure. When the first tight contact portion 158 of the first back-flow arm 156 faces the lower portion of the first screen 190, the filtered water outside the first screen 190 is separated from the first screen 190 by the pressure difference, The foreign matter adhered to the inside of the first screen 190 is released in this process. The backwash water including the cleaned foreign matter is discharged through the first screen mounting hole 171, the first backwash water inlet 159, the first reverse water guide portion 157, the backwash body 151 ), A reverse water discharge pipe (167), and a reverse water discharge outlet (166).

The first backwash arm 156 and the second backwash arm 160 move in accordance with the rotation of the backwash body 151 and perform the same function. Therefore, the function description of the second backwash arm 160 can be substituted according to the description of the first backwash arm 156. When the second tight contact portion 162 of the second back-and-forth arm 160 is tightly attached to the second screen 200 by the second tight contact spring 162a, the second tight contact portion 162 The second reverse osmosis inflow portion 163 of the second screen mounting hole 181 on the upper portion of the second screen 200, the second reverse osmotic water induction portion 161, the backwash main body 151 ), A reverse water discharge pipe (167), and a reverse water discharge outlet (166). When the backwash arms 156 and 160 are rotated, the plurality of screens are sequentially cleaned.

The backwashing means 150 may be operated by a separate control unit. A pressure sensor (not shown) is provided on each of the contaminated feeding inlet 111 and the filtered water outlet 112. When the pressure difference between the contaminated feeding inlet 111 and the filtered water outlet 112 becomes equal to or greater than a predetermined difference, It is determined that foreign matters are adhered to the screen, and the back-washing process is performed by operating the motor 141. As a matter of course, it is also possible to perform a detailed backwashing in which the filtration process and the backwash process are performed from the beginning.

When the backwashing means 150 and the backwatershed discharge chamber 165 are disassembled through the manhole 210, the discharge chamber lid 168 is first disengaged from the backwash water discharge pipe 167. The first backwash arm 156 is pushed upward in the direction of the first screen 190 so that the first backwash springs 158a are brought into close contact with the first screen mounting portion 170, And separates the second backwashing arm 160 from the second backwashing arm mounting portion 154 and the second screen mounting portion 180 located at the second backwashing arm 160. [ Then, after the separated second backwash arm 160 is returned to its original position by making use of the separated space and brought into close contact with the first backwash arm 156, the first backwash arm 156 likewise rotates the first backwash arm mount 153 And the first screen mounting portion 170, respectively. Next, when the backwash body 151 is separated from the backwash water discharge pipe 167, disassembly of the backwashing means 150 is completed. Although it has been described in the present description that the second backwash arm 160 is first separated, it is also possible that the first backwash arm 156 is separated first.

As described above in detail, the water filtration apparatus according to the present invention can increase the filtration efficiency while maintaining the total filtration area by dividing the screen. If the screen is long and only in one area, the back end of the screen, which is distant from the backwash arm, may not be backwashed in the process of filtering the contaminated water and backing up the screen. Therefore, if the backwash of the screen is not properly performed, the filtering efficiency will be deteriorated because the foreign matter is not adhered to the screen in the subsequent filtration process. However, in the present invention, since the screens are divided into shorter lengths and are installed in the two regions, the filtration efficiency can be increased while maintaining the overall filtration area, compared with a case where the screen is formed long in one region.

Further, since each of the screens is formed in a short length while keeping the total filtration area of the screen at the same, it is possible to remarkably reduce the screen drawing space of the casing when the screen is taken out from the casing. Therefore, it is very useful to install a water filtration device in a narrow space such as a ship.

Further, since the backwash arm is not supported by the screen mounting portion, it is easy to disassemble or assemble the backwash arm. In other words, conventionally, there is a device in which a motor is installed at the uppermost part of the casing of the water filtration device, and the power transmission shaft penetrates into the inside thereof and is connected to the back-pressure arm. Even if the motor is not installed at the uppermost part of the casing, there was. Such water filtration devices have a disadvantage in that it is complicated to disassemble the parts between the parts when the backwashing arm is replaced, and furthermore, when the internal parts such as the screen are replaced, and the work of the operator is troublesome and time consuming. The water filtration apparatus according to the present invention does not require the internal back-and-forth arms to be coupled to the reverse water discharge port provided on the side surface of the casing, so that it is not necessary to separately support the internal back-and-forth arms. Accordingly, since only a minimum necessary coupling is possible in the interior, the operator can easily disassemble and assemble the water filtration apparatus. And leakage between the filtration space and the contaminated water space through the first screen mount and the second screen mount is originally prevented because there is no engagement of the structure penetrating through the first screen mount and the second screen mount.

Further, the design is simple since the rotating power transmitting portion for transmitting the rotating power to the backwashing means does not have a structure that can be separated and combined. That is, conventionally, since the motor is installed on the upper part of the lid part, and then the rotation shaft is connected to the backward-moving part disposed below the screen mounting part through the filtration space, the rotational force is transmitted. Therefore, . However, in the present invention, since the motor is installed on the side surface of the casing and then the rotating power is transmitted to the backwashing means, even if the lid is opened, the rotating power transmitting portion is not affected and thus complicated design for connection and disconnection of the power transmission is not required .

Lastly, relatively large foreign substances contained in the contaminated water initially entering the contaminated feeding inlet are caught in the parts of the rotary power transmitting part, thereby causing malfunctions in transmitting rotational power or damaging parts related to power transmission It is possible to prevent contaminants from adhering or sticking to the rotary power transmitting portion by providing a contaminant prevention screen for preliminarily filtering relatively large foreign substances. This is because when the contaminated water is introduced into the contaminated milk inlet, the inside of the casing is directly exposed to the contaminated water, so that the contaminated water may be adhered to or caught in the sprocket and the chain. Attachment of foreign matter to the sprocket and chain may result in failure to properly transfer power to the backwash arm and may eventually lead to machine failure, as delays and damage may occur between precisely interlocked configurations. Therefore, it is possible to prevent contaminants from adhering to the rotating power transmitting portion and the backwash means by installing a pollution preventing screen on the contaminated feeding inlet, and to prevent a machine failure. That is, the contaminant prevention screen does not perform the inherent precise filtration function of the water filtration device but is used to perform preliminary filtration to prevent malfunction or damage of the rotary power transmission portion.

Meanwhile, various types of motors, such as an electric motor, a hydraulic motor, or a pneumatic motor, can be applied to the motor for generating the rotational power in the rotary power transmission unit described above. In particular, when a water filtration system is installed in an LNG carrier carrying LNG, a pneumatic motor may be applied to reduce the risk of explosion due to sparking.

In addition, although the spindle and the chain are connected to the rotary shaft of the motor according to the present invention, it is also possible to connect the spindle and the chain to the rotary shaft of the motor, It is also possible for the bevel gear and the driven gear to transmit. In other words, if the power of the motor can be transmitted to the backwash arm, power transmission in various ways is possible.

In the present invention, the screen is provided in the first filtering space and the second filtering space. However, the screen may be installed only in one area. That is, if the space in which the water filtration device is installed is not sufficient, the filtration may be performed only on the first screen without the second screen.

In addition, a screen may be further provided in the concentric circles of the first screen and the second screen to form another concentric circle, thereby increasing the filtration efficiency. That is, referring to FIG. 1, a screen is further provided beside the first screen and the second screen, and the concentric circles formed by the plurality of screens when viewed from above have the same center and different diameters.

Finally, the water filtration apparatus according to the present invention can be installed horizontally or vertically. That is, it is possible to disassemble and assemble the water filtration apparatus on both sides by using a lid unit provided on both screens, freely installed according to the working environment.

The foregoing description of the preferred embodiments of the present invention has been presented for the purpose of illustration and it will be apparent to those skilled in the art that various modifications, additions and substitutions are possible within the spirit and scope of the invention, And additions should be considered as falling within the scope of the claims of the present invention.

100: Water filtration device
110: casing
111: Pollutant feeding inlet
111a: Contaminated water inflow space
112: Filtrate outlet
113: First filtration space
114: first discharge hole
115: Second filtration space
116: Second discharge hole
130: cover part a
131: lid b
140: Rotational power transmission part
141: Motor
142: Motor reducer
143: Motor shaft
144: Motor sprocket
145: Chain
146: Motor shaft fixing portion
147: Motor shaft support bearing
150: backwash means
151: backwash body
151a: chamber jaw chin
152: backwash means sprocket
153: first backwashing arm seat portion
154: second backwash arm mounting part
155: stationary drainage passage
156: First Backwash Arm
157: first stationary water induction portion
158: first contact portion
158a: first tightening spring
159: the first stationary water inflow section
160: Second backwash arm
161: the second stationary water induction portion
162: second tightening portion
162a: second tightening spring
163: the second stationary water inflow section
164: stationary drainage passage
165: stationary discharge chamber
166: station water outlet
167: station of the station
168: Exhaust chamber cover
170: first screen mounting portion
171: First screen mounting hole
180: second screen mount
181: Second screen mounting hole
190: 1st screen
200: Second screen
210: Manhole
220: Foreign body screen
230: blocking screen guide piece

Claims (1)

A casing having a polluted water feeding inlet through which polluted water flows, a filtered water outlet for discharging filtered water filtered from the introduced polluted water, and a reverse water discharge outlet for discharging reverse water containing foreign matter;
A first screen mounting portion and a second screen mounting portion which are respectively mounted above and below the contaminated feeding inlet on the inside of the casing;
A first screen and a second screen which are respectively installed above the first screen mounting portion and below the second screen mounting portion to filter foreign matters from the contaminated water flowing through the contaminated milk inlet;
And a backwash arm which is installed between the first screen mounting portion and the second screen mounting portion on the inside of the casing and rotates by receiving a rotational force transmitted from the motor and the backwash arm is rotated through the first screen mounting portion and the second screen mounting portion A backwashing means for guiding reverse water containing foreign matter to the reverse water discharge outlet side by facing the first screen and the second screen; And
And a lid portion on which the motor is mounted while closing or opening an upper portion of the casing,
Wherein said backwashing means has a backwash body which is rotated by receiving a driving force,
And the backwash body is driven by gear drive means connected to the backwash body in the lateral direction.

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