KR20130040046A - A multi-cage type ballast water filter equipment improving durability of back-washing line - Google Patents

Abstract

PURPOSE: A multi cage type ballast water filtering apparatus capable of increasing the durability of a backwashing line is provided to prevent back pressure formation in a discharging pipe and the backwashing line, maintain airtightness of filter, and increase the convenience of replacement. CONSTITUTION: A filtering unit of a multi cage type ballast water filtering apparatus capable of increasing the durability of a backwashing line comprises a filter(20) and an automatic washing part. The automatic washing part comprises a driver(310), a suction part(320), and a discharging part(330). A discharging part(330) of the automatic washing part has a discharging pipe(331), which is a channel through which foreign substance is discharged, in order to form a backwashing line(332). The lower part of the body includes a second drain line(3321) to drain the ballast water inside the body through the second drain line in the case when the operation of the filtering apparatus is stopped in order to prevent the corrosion of the inside of the body by stagnant ballast water.

Description

A multi-cage type ballast water filter equipment improving durability of back-washing line

The present invention relates to a filtration apparatus for treating ballast water by a filtration method, in particular, in the case of a non-operational state in which the filtration device does not operate in a multi-cage type ballast water filtration device, in particular, backwashing of the automatic washing unit. It is possible to completely discharge all ballast water in the line to solve the corrosion and durability problems caused by the remaining ballast water in the backwash line, and a second drain line with a control valve attached to the bottom of the backwash line is formed. By draining the ballast water in the washing line to the second drain line, it is possible to solve the problem of corrosion in the backwash line due to the accumulated ballast water, as well as to install a second air injection part for injecting air into the discharge pipe. The ballast water inside the backwash line is disposed to drain air through the second drain line. Number of multi-cage type ballast of the mouth to increase the discharge pipe and the backwash line durability of the backwash line to remove the foreign matter attached to the inner relates to a filtering device.

Ballast water means seawater filled in the ballast tanks in order to maintain the balance of the ship when the ship is operated without luggage.

With the increase of international trade volume, the marine transportation ratio is increasing, and as the number of vessels increases and the size of vessels increases rapidly, the volume of ballast water used by vessels is greatly increasing. As the amount of ballast water used in vessels increases, the number of cases of harms caused by marine ecosystems due to foreign marine species is also increasing. In order to solve these international environmental problems, the International Maritime Organization (IMO) The International Convention on the Control and Management of Ballast Water and Sediments of Ships has been completed, and a new ballast water treatment system has been installed on ships newly constructed from 2009.

Conventionally, as a method for treating ballast water, there has been a method in which ballast water is exchanged at sea or treated on the land, but there is a disadvantage in that it has a disadvantage of inefficiency and a method of installing a treatment facility for treating ballast water in a ship is widely used, In particular, a filtration method using a filter as a treatment method used in a ballast water treatment facility is mainly used. As a ship becomes larger, the need to treat a large amount of ballast water in a large ship is increased. Therefore, A multi-cage type ballast water filtration device is used.

Multi-cage type ballast water filtration device is a plurality of filtration units in which a filter and an apparatus for automatically cleaning the same form a set in the filtration device. The filtration unit can process the ballast water according to the number of filtration units included therein. As the processing capacity can be increased, it is mainly used for large vessels that need to treat a large amount of ballast water.

1 is a side view of a conventional multi-cage type ballast water filtration device, Figure 2 is a plan view of a conventional multi-cage type ballast water filtration device.

However, the conventional multi-cage type ballast water filtration device has a configuration that automatically cleans the foreign matter attached to the filter and discharges it to the outside during use, but is mounted on the ship when the vessel is anchored for a long time or requires repair When the filtration device is in use for a long time, the salt inside of the ballast water remaining in the filtration device as well as not remaining in the pipe line of the automatic washing unit may cause corrosion or damage to the inside of the filtering device, particularly the piping line of the automatic washing unit. No problem recognition or problem solving principle has been disclosed.

In addition, the conventional filtration device, as shown in Figures 1 and 2, the drive unit (a) for driving the backwashing device for backwashing each filtration unit included in the filtration device, as well as for discharging foreign matter after backwashing Since both the discharge part (b) and the pipe line (c) have a structure that is concentrated on the upper part of the filtration device, work is cumbersome during installation, replacement and dismantling due to the mixed configuration of the above components, and in particular, a special environment such as a ship In view of the fact that the space above the filtration system is very narrow because the space where such filtration device is installed is also very narrow (a space such as a machine room is designed relatively narrow to secure a space for a ship's own purpose), In the structure in which the components are concentrated on the upper portion of the filtration apparatus as in the related art, the maintenance difficulty is inevitably increased.

In addition, as each component of the filtration device is concentrated on the upper part of the filtration device, the upper space required for installation and dismantling of the filtration device must also increase, so that a separate upper space for the filtration device must be secured in a special environment called a ship. There is also a problem that causes an inefficient spatial structure.

In addition, in the conventional filtration apparatus, a backwashing process for removing foreign matters accumulated in the filter is performed, and when the foreign matters remain in the outlet part that is a passage for finally discharging the foreign substances sucked in the backwashing process, As a result, corrosion may occur inside the pipes of the back washing line due to foreign substances and salt groups included in the back washing water. In addition, this problem is that the severity of the problem is increased when the filtration device is left unused for a long time, there is no technical configuration to solve the problems related to the durability of the backwash line.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

It is an object of the present invention to completely discharge all ballast water in the backwashing line of the automatic washing unit, especially in the case of the non-operational state in which the filtration device is not operated, and thus due to the remaining ballast water in the backwashing line. It is to provide a multi-cage type ballast water filtration device to increase the durability of the backwash line to solve the corrosion and durability problems.

Another object of the present invention is to form a second drain line at the bottom of the back washing line to drain the ballast water in the back washing line to the second drain line can solve the problem of corrosion in the back washing line due to the accumulated ballast water Of course, the second air injection portion for injecting air into the discharge pipe is disposed on the discharge pipe to inject air when the ballast water in the back washing line is drained through the second drain line to discharge the inside of the discharge pipe and the back washing line. It is to provide a multi-cage type ballast water filtration device to increase the durability of the backwash line to remove the adhered foreign matter.

Still another object of the present invention is to consider the special installation environment of the filtration apparatus mounted on the vessel, the discharge portion and the back washing line for the discharge of foreign matter after the backwashing filter among the components concentrated on the upper filtration device, the lower part of the filtration device In addition to dispersing the filter, the discharge pipes of each filtration unit are communicated in a single line, thereby simplifying the structure and reducing the space for installing the upper part of the filtration unit. It provides a multi-cage type ballast water filtration system that increases the durability of backwash lines that can be integrated and managed efficiently.

Another object of the present invention is to prevent damage to the device, including dual triple related configurations which can prevent the automatic washing unit components moving back and forth for backwashing the filter in each filtration unit in advance. It is to provide a multi-cage type ballast water filtration device to increase the durability of the backwash line to ensure durability.

Still another object of the present invention is to prevent the suction part which sucks foreign substances in the process of backwashing the filter in each filtration unit so as not to leave foreign substances which are not sucked in the filter on the movement path, and to prevent back pressure from being formed in the discharge pipe and the backwashing line. To provide a multi-cage type ballast water filtration device for increasing the durability of the backwash line, which can improve the airtightness and replacement of the filter.

The multi-cage type ballast water filtration apparatus for increasing the durability of the backwashing line for achieving the above object of the present invention includes the following configuration.

In the multi-cage type ballast water filtration apparatus for increasing durability of the backwashing line according to an embodiment of the present invention, a plurality of filtration units are packaged and connected in a body having an inlet and an outlet through which ballast water flows in and out, and the filtration unit is A filter for filtering the ballast water flowing through the body, and an automatic washing unit for backwashing the foreign matter attached to the filter, wherein the automatic washing unit is connected to the driving unit and a driving unit for driving the automatic washing unit by a signal from the control unit. And a suction part for suctioning foreign substances attached to the filter while being moved, and a discharge part for discharging the foreign substances sucked from the suction part, and the discharge part is a discharge tube which is a passage through which the foreign substances are discharged and is located at the bottom of the body. A washing line is formed, and a second drain line is formed below the back washing line. It consists of, is characterized in that to prevent the inside of the ballast water inside the backwash line when the operation stop of the filter device and the second backwash line due to the drain water accumulates in ballast to the drain line corrosion.

According to another embodiment of the present invention, in the multi-cage type ballast water filtration apparatus according to the present invention, the discharge portion is characterized in that the discharge pipe of the plurality of filtration units are formed in communication with one back washing line at the bottom of the body.

According to still another embodiment of the present invention, in the multi-cage type ballast water filtration apparatus according to the present invention, a second air injection portion for injecting air into the discharge pipe is disposed on the discharge pipe, so that the ballast water inside the backwash line is disposed. When it is drained through the second drain line is characterized in that it is possible to remove the foreign matter attached to the inside of the discharge pipe.

According to another embodiment of the present invention, in the multi-cage type ballast water filtration apparatus according to the present invention, the suction part is connected to a suction rod for suctioning foreign substances attached to the filter, the core acting as a rotating shaft for rotating the suction rod. The stopper is provided on one side, and when the stopper contacts the body, it is possible to prevent the suction rod from colliding with the body by limiting the movement of the core.

The present invention can obtain the following effects by the above-described embodiment, the constitution described below, the combination, and the use relationship.

The present invention enables the exhaustion of all ballast water in the backwashing line of the automatic washing unit, especially when the non-operating state in which the filtration device is not operated continues, thereby causing corrosion and It has the effect of solving the durability problem.

The present invention can solve the problem of corrosion inside the back washing line due to the ballast water accumulated by draining the ballast water in the back washing line to the second drain line by forming a second drain line at the bottom of the back washing line. On the discharge pipe, a second air injection unit may be disposed in the discharge pipe to inject air when the ballast water inside the back washing line is drained through the second drain line, thereby depositing foreign matter attached to the discharge pipe and the back washing line. It has the effect of removing it.

The present invention is to disperse the discharge portion and the back washing line for discharging the foreign matter after the filter backwash of the components concentrated in the upper part of the filter in consideration of the special installation environment of the filtration device mounted on the ship to the lower part of the filtration device Of course, by connecting the discharge pipe of each filtration unit in a single line, it is possible to simplify the structure and reduce the space for the installation of the filtration unit, as well as to integrate the foreign matter discharge and back pressure management of each filtration unit efficiently It has a manageable effect.

The present invention includes dual triple related components which can prevent the damage of the automatic washing unit components moving in order to backwash the filter in each filtration unit in advance, thereby preventing damage to the apparatus and ensuring durability. Has the effect.

According to the present invention, the suction unit which sucks the foreign substances in the process of backwashing the filter in each filtration unit does not leave foreign substances which are not sucked in the filter on the movement path, and prevents back pressure from being formed in the discharge pipe and the backwashing line, Has the effect of increasing the ease of maintenance and replacement.

1 is a side view of a conventional multi-cage type ballast water filtration device
2 is a plan view of a conventional multi-cage type ballast water filtration device
Figure 3 is an exploded perspective view of a multi-cage type ballast water filtration device according to an embodiment of the present invention
4 is a cross-sectional view of the filtering device of FIG.
5 is a plan view of the filtration device of FIG.
6 is a bottom view of the filtration apparatus of FIG. 3.
7 is a cross-sectional view showing the relationship between the back washing line and the back pressure prevention tank.
8 is an enlarged view of portion 'A' of FIG. 4 showing the relationship between the stopper and the bushing.
9 is an enlarged view of a portion 'B' of FIG. 4 showing a detailed configuration of a driving unit;
10 is a reference diagram showing the relationship between the diameter of the suction hole and the lead interval that moves the suction rod 1 rotation
11 is a reference diagram showing the separation interval between the shankdong interval of the suction rod and the suction rod
12 is a cross-sectional view showing a state in which the first and second pressure sensors are located.
13 is a cross-sectional view showing a state where the drain line and the air injection portion are located;
14 is a cross-sectional view showing a state where the second drain line and the second air injection unit are located;
FIG. 15 is an enlarged view of a portion 'C' of FIG. 4 showing a coupling relationship between an upper side of a filter and FIG.
16 is a cross-sectional view showing a coupling relationship of the upper side of the conventional filter
17 is an enlarged view of a portion 'D' of FIG. 4 showing a coupling relationship under the filter;

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the multi-cage type ballast water filtration device for increasing the durability of the backwashing line according to the present invention will be described in detail. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Figure 3 is an exploded perspective view of the multi-cage type ballast water filtration apparatus according to an embodiment of the present invention, Figure 4 is a cross-sectional view of the filtration device of Figure 3, Figure 5 is a plan view of the filtration device of Figure 3, Figure 6 3 is a bottom view of the filtration apparatus of FIG. 3, and FIG. 7 is a cross-sectional view illustrating a relationship between a backwash line and a back pressure preventing tank, and FIG. 8 is an enlarged view of part 'A' of FIG. 4 showing a relationship between a stopper and a bushing. 9 is an enlarged view of a portion 'B' of FIG. 4 showing a detailed configuration of a driving unit, and FIG. 10 is a reference diagram showing a relation between a lead spacing and a suction port that a suction rod moves while rotating one rotation, and FIG. FIG. 12 is a cross-sectional view showing a state where the first and second pressure sensors are located, and FIG. 13 is a view illustrating a state where the drain line and the air injection unit are located. 14 is a sectional view of the second drain line and the second air injection unit. Fig. 15 is an enlarged view of the 'C' portion of Fig. 4 showing the coupling relationship of the upper side of the filter, Fig. 16 is a sectional view showing the coupling relationship of the upper side of the conventional filter, Fig. 17. Is an enlarged view of portion 'D' of FIG. 4 showing a coupling relationship under the filter.

First, referring to Figures 3 to 6 with respect to the basic structure of the multi-cage type ballast water filtration apparatus according to an embodiment of the present invention, the multi-cage type ballast water filtration device according to an embodiment of the present invention the ballast water A structure in which a plurality of filtration units are packaged and connected in a body 10 having an inlet 110 and an outlet 120 to flow in and out, and each filtration unit filters a ballast water flowing through the body 10. 20 and the automatic washing unit 30 for backwashing the foreign matter attached to the filter 20 (that is, the filter unit is not marked with a separate reference numeral, but the filter 20 and Means a unit consisting of the automatic washing unit 30).

The body 10 is a part forming the outer skeleton of the multi-cage type ballast water filtration apparatus according to the present invention, the ballast water introduced into the interior through the inlet 110 of the body 10 is in the body 10 The foreign matter is filtered and processed while passing through the filtration unit is located is discharged through the outlet portion 120 of the body (10). The outlet portion 120 of the body 10 is preferably located above the inlet portion 110, the inside of the body 10, as shown in Figure 4, between the inlet portion 110 The filter chamber 161 is formed by the lower surface 150 forming the lowermost surface of the body 10 and the partition wall 140 forming the intermediate surface and temporarily storing the ballast water flowing into the inlet 110 before the treatment. And the upper surface 130 forming the uppermost surface of the partition wall 140 and the body 10 with the outlet portion 120 interposed therebetween and filtered through the filter 20 and the filter 20. After filtration chamber 162 may be formed to store the treated ballast water. The filter inlet hole 131 is formed through the upper surface 130 to allow the filter 20 to enter the body 10, and is coupled to the filter inlet hole 131 after the filter 20 is installed. The upper cover plate 170 to close it is combined. The partition wall 140 has a ballast water inlet 141 formed therethrough so that the ballast water temporarily stored in the filtration chamber 161 can be introduced into the filter 20, and surrounds the ballast water inlet 141. Protruding pieces 142 which are in contact with the inner surface of the lower side of the filter 20 may be formed so that the lower side of the 20 may be stably fixed.

The filter 20 is configured to remove the foreign matter by filtering the ballast water introduced into the body 10, the filter 20 is inserted into the body 10 through the filter inlet 131 is the post-filtration chamber 162 The bottom of the filter 20 is fixed to the partition wall 140, the upper surface 130 of the upper side, respectively. When the filter 20 is installed, the ballast water temporarily stored in the filtration chamber 161 through the inlet 110 is introduced into the filter 20 through the ballast water inlet 141 to filter 20 As the foreign matter is filtered through the inner peripheral surface of the filter 20 while moving to the post-filtration chamber 162 through. The filter 20 may be preferably formed in a cylindrical shape, and foreign substances such as particles and particles are filtered in the process of filtering the ballast water to the filter 20. If such filtration continues, foreign matters accumulate on the inner circumferential surface of the filter 20, and thus the filtration function is deteriorated. Thus, foreign matters on the inner circumferential surface of the filter 20 are removed by the automatic washing unit 30 to be described later.

The automatic washing unit 30 is configured to backwash the foreign matter attached to the filter 20. For this purpose, the automatic washing unit 30 drives the automatic washing unit by a signal of a controller (not shown) ( 310, a suction part 320 connected to the driving part 310 to suck foreign matter attached to the filter 20, and a discharge part 330 to discharge the foreign matter sucked from the suction part 320. It may include.

The driving unit 310 provides power for operating the automatic cleaning unit 30, and uses the power to rotate and / or move the suction unit 320, which will be described later, and generally provides driving power. The driving motor 311 and one end is connected to the driving motor 311, the core of the suction unit 320 to be described later that is connected to the other end while being rotated and / or moved by receiving power from the driving motor 311 It may include a drive shaft 312 to rotate and / or move in conjunction with (322). At this time, in order to specify the shankdong interval of the drive shaft 312, the drive shaft 312 has a separate contact means 313, which is formed in a plate shape so as to contact a pair of limit switches to be described later An example) and a pair of first limit switches 314 spaced up and down by a contact interval between the contact means 313 (which corresponds to the shank east distance of the drive shaft 312) are disposed. When the driving shaft 312 moves up and down, the contact means 313 contacts the lower first limit switch 314 so as to move upward. On the contrary, the contact means 313 moves upwardly. 314) has a structure to move downward.

The suction unit 320 is connected to the driving unit 310 and sucks foreign substances attached to the filter 20 while moving. The suction unit 320 includes a suction rod 321 for sucking foreign substances adhered to the filter 20, The suction rod 321 is connected to the driving shaft 310 of the driving unit 310 at a predetermined distance along the longitudinal direction and connected to the driving shaft 312 of the driving unit 310 to rotate And a core 322 acting as a rotation axis for rotating the suction rod 321 while moving up and down. The suction rod 321 has a foreign material and a backwashing water attached to the inner circumferential surface of the filter 20 through a suction port 3211 formed at the center thereof while one end thereof is in contact with or very close to the inner circumferential surface of the filter 20. The filtered ballast water outside the filter 20 is sucked together with the foreign matter attached to the inside of the filter 20 by the suction pressure at the suction port 3211, which is passed back from the outside of the filter 20 to the backwash water. And the like to be moved to the core 322, and the core 322 has a discharge part to be described later through a conduit formed in a lengthwise direction with foreign substances sucked from each suction rod 321 and the like. 330 to allow it to be discharged.

The discharge portion 330 is a portion for discharging the foreign matter sucked by the suction unit 320, one end of the discharge pipe 331 which is the discharge passage of the foreign matter is in communication with the core 322 and the other end is in communication with the outside As a result, foreign matters and the like are discharged from the core 322 to the outside. An exhaust valve 3311 is connected to one side of the discharge pipe 331, and the exhaust valve 3311 is connected to one side of the discharge pipe 331 to suction / absorb foreign substances attached to the filter 20. It is controlled by a controller (not shown) to provide a suction force for discharge. That is, when the exhaust valve 3311 is opened, the discharge pipe 331, the core 322, and the suction bar 321 may be at atmospheric pressure, ie, high inside the filtration chamber 162 or inside the filter 20. Since a low air pressure is formed compared to the air pressure, the ballast water inside the filtration chamber 162 is sucked into the suction bar 321 having a low air pressure, and foreign substances attached to the inner circumferential surface of the filter 20 are also sucked together (at this time, suction The ballast water of the post-filtration chamber 162 serves as the backwash water), and when the exhaust valve 3311 is closed, suction of the backwash water and the foreign matter is stopped.

In the multi-cage type ballast water filtration device according to an embodiment of the present invention, in particular, the discharge pipe 331 which is a passage for discharging the foreign matter from the discharge portion 330 is located below the body 10, the body (10) The discharge pipe 331 of the plurality of filtration units in the lower portion is formed in communication with one back washing line 332, it is characterized in that it can achieve a simple structure and increase the space efficiency in the vessel.

That is, as pointed out as a problem of the prior art, in the conventional multi-cage type ballast water filtration device, as well as the drive unit (a) for driving the backwashing device for backwashing each filtration unit included in the filtration device, of course, backwashing Since the discharge part (b) and the pipe line (c) for discharging the foreign matter afterwards have a structure that is concentrated on the upper part of the filtration device (see FIGS. 1 and 2), In addition to the installation work, there was a problem that the work is cumbersome at the time of replacement and dismantling, especially in a special environment such as a ship, the space in which the filtration device as the present invention is installed is very narrow (to secure a wide space for a ship's unique purpose) Given that the space such as the machine room is relatively narrow), the space above the filtration device is also very narrow. In the structure in which various components are concentrated on the upper part of the filtration device, maintenance difficulty is inevitably increased. Furthermore, as each component of the filtration device is concentrated on the upper part of the filtration device, the more necessary to install and dismantle it, Since the space must also be large, a separate upper space must be secured for the filtration device in a special installation environment such as a ship, and the lower space formed between the filtration device and the bottom surface by a pedestal supporting the filtration device is not utilized. There are also problems that cause inefficient spatial structures that do not exist.

Therefore, in the present invention, in order to fundamentally solve the above-described conventional problems, as shown in FIGS. 3 to 6, the discharge pipe 331 is a passage through which the foreign matter is discharged from the discharge part 330, the body Located in the lower portion of the upper portion (10), and protrudes to the outside through the lower surface 150 of the body 10, a plurality of discharge pipes protruding for each filtration unit at the lower portion of the body 10 ( 331) to communicate with all to form one back washing line 332, the foreign substances discharged by the back washing process from each filtration unit through the one back washing line 332 to the outside at once It will form a structure that allows it. In the structure as described above, the driving unit 310 is disposed on the upper portion of the body 10 and the discharge portion 330 is separately disposed on the lower portion of the body 10, so that all configurations are the body ( It is not necessary to secure the upper space of the filtration device more than necessary in a special environment called a ship by eliminating the problem as the conventional one concentrated on the upper side of 10), and the filtration device and the bottom by the pedestal 151 supporting the filtration device from the bottom. Since the outlet portion 330 is positioned in the lower space by utilizing the lower space formed between the surfaces, it is possible not only to increase the usability of the space but also to configure a separate piping line extending downward from the discharge portion located at the upper side as in the prior art. It is possible to compact the device, and in particular, during installation, replacement, and dismantling of the discharge part 330, the worker does not go to the upper part of the filtration device to work in a narrow space. In addition, since the discharge unit 330 disposed below the filtration device may be installed, replaced, and dismantled, the convenience of operation and the convenience of maintenance may be increased (as well as the driving unit 310 in the upper part of the body 10). And the installation, replacement and dismantling of each part of the filtration device can also be easily performed because the discharge portion 330 of the upper part of the filtration device is separated to the bottom). In addition, since the discharge pipe 331 extends downward rather than upward as in the prior art, when the foreign matter sucked in the back washing process through the discharge pipe 331, foreign matter moves more easily along the discharge pipe 331. Back pressure in the discharge pipe 331 (because the moving direction is coincident with the gravity direction) ('back pressure used in the present invention, by suctioning foreign matter attached to the inner peripheral surface of the filter 20 through the discharge pipe 331 and discharged) In order to reduce the pressure formed in the discharge pipe 331 outside the filter 20 (that is, after the filtration chamber 162) or the pressure inside the filter 20, a large amount of foreign matter or backwash moves to the discharge pipe 331. As the filling of the discharge pipe 331 is full, the pressure in the discharge pipe 331 rises from low pressure to high pressure, thereby forming a pressure that makes it difficult to suck foreign substances attached to the inner circumferential surface of the filter 20. In other words, as the back pressure increases, it is not easy to discharge foreign substances through the discharge pipe 331, so it is important to adjust the pressure so that the back pressure in the discharge pipe 331 does not increase. Can be reduced even more. In addition, the discharge pipe 331 of each filtration unit communicates (converges) with one back washing line 332 directly from the lower portion of the body 10 so that foreign matter or back washing water is discharged through one back washing line 332. Since it is formed, even if there are a plurality of filtration unit has an advantage that the discharge portion 330 is formed in a simple structure.

In addition, in the present invention, as shown in Figures 4, 6 and 14, a second drain line 3321 with a second control valve (33211) is formed at the bottom of the back washing line 332, the filtration apparatus The ballast water in the backwash line 332 is completely drained to the outside through the second drain line 3331 when the operation of the gas is stopped, thereby preventing corrosion in the backwash line 332 due to the accumulated ballast water. It is characterized by enabling it.

That is, as described above, the ballast water filtration device of the present invention frequently occurs when the ballast water filtration device is stopped, such as when the vessel is anchored for a long time due to the nature of being installed and operated on the ship. When the device is not operated for a long time, the ballast water is left standing in the discharge pipe 331 or the back washing line 332 of the automatic washing unit 30 used to backwash the foreign substances of the filter device filter 20. If the characteristics of the ballast water containing salt, the corrosion of the discharge pipe 331 or the back washing line 332 due to the problem that adversely affects the durability of the discharge pipe 331 or back washing line 332 Will occur.

Therefore, in the present invention, as shown in Figures 4, 6 and 14, a separate second control valve (33211) in the lower portion of the back washing line (332) in which the discharge pipes (331) of each filtration unit are in communication with each other An attached second drain line 3331 is further formed. As described above, when the filtration device is not operated for a long time through the second drain line 3331 formed at the lowest position of the backwashing line 332 where the discharge pipes 331 of each filtration unit are connected and gathered together. The second drain line 3331 opens the second control valve 3331 of the second drain line 3331 to collect backwash water and foreign matter accumulated in the discharge pipe 331 and the backwash line 332 of each filtration unit. Since it can be discharged to the outside through, the discharge pipe 331 of each filtration unit is communicated with the ballast water, ie, backwash water and foreign matters are not completely discharged in the back washing line 332 is gathered as one. Accordingly, corrosion of the discharge pipe 331 or the backwash line 332 due to the salt of the ballast water accumulated in the discharge pipe 331 or the backwash line 332 of each filtration unit is not discharged as in the related art. This will fundamentally prevent problems. The position where the second drain line 3321 is installed is preferably formed in communication with the lowest portion of the back washing line 332.

In addition, in the present invention, in addition to the second drain line 3331 formed under the backwashing line 332, a second air may be injected into the discharge pipe 331 on the discharge pipe 331 of each filtration unit. The air injection unit 3322 is further disposed to inject air when the ballast water in the backwash line 332 is drained through the second drain line 3331 to remove foreign substances attached to the inside of the discharge pipe 331. Can be removed.

That is, as shown in Figures 4, 5 and 14, the second air injection unit 3322 (this is air or compressed) to inject air toward the discharge pipe 331 inside the discharge pipe 331 of each filtration unit By connecting to a compressor or the like to provide air or compressed air to inject air into the discharge pipe 331, and may further include a control opening and closing valve for adjusting the injection, the second drain line ( Air (or compressed air) is discharged through the second air injection unit 3322 at the time of drainage (discharge) of backwash water and foreign matter in the discharge pipe 331 and the backwashing line 332 through 3321. Injected into the discharge pipe 331 allows the backwash water and the foreign matter in each discharge pipe 331 and the back washing line 332 to be quickly discharged through the second drain line 3331. In addition, due to the pressure caused by the air injection through the second air injection unit 3322, foreign substances, etc. attached to the inner surface of the discharge pipe 331 of each filtration unit may also be discharged together from the inner surface of the discharge pipe 331. Effects can also be expected. The opening and closing of the second control valve 3311 of the second drain line 3321 and / or the air injection through the second air injection part 3322 may be automatically controlled by a controller (not shown).

In addition, in the present invention, as shown in Figures 4, 6 and 13, the drain line 180 with a separate control valve 181 is formed at the bottom of the body 10, the operation of the filtration device is stopped In this case, the ballast water inside the body 10 may be drained to the drain line 180 to prevent corrosion of the inside of the body 10 due to standing ballast water.

That is, the ballast water filtration device of the present invention often occurs when the ballast water filtration device is stopped, such as when the vessel is anchored for a long time due to the nature of being mounted on the vessel, the filtration device does not operate for a long time If the ballast water is left standing in the body 10 of the filtration device, the ballast water containing salt may cause corrosion to the inside of the body 10 due to the characteristics of the ballast water containing salt. There is a problem that will adversely affect.

Therefore, in the present invention, as shown in Figures 4, 6 and 13, a separate control valve 181 is attached to the lower portion of the body 10, more specifically, the lower surface 150 of the lowermost body 10 A drain line 180 (for reference, the control valve 181 may be omitted). As such, when the filtration device is not operated for a long time through the drain line 180 formed on the body 10, that is, the lower surface 150, which is the lowest position below the filtration chamber 161, the control of the drain line 180 is performed. Since the valve 181 can be opened to discharge the ballast water accumulated in the pre-filtration chamber 161 and the post-filtration chamber 162 to the outside through the drain line 180, the pre-filtration chamber 161 of the body 10. After filtration and inside the chamber 162, the ballast water is completely discharged and is not left. Therefore, it is possible to fundamentally prevent problems such as corrosion occurring in the body 10 due to salinity of ballast water accumulated in the body 10 without being discharged as in the related art. The position where the drain line 180 is installed is preferably formed in communication with the lowest portion of the lower surface 150.

In addition, in the present invention, in addition to the drain line 180 formed below the body 10, an air injection unit 190 for injecting air into the body 10 in addition to the upper portion of the body 10 Including the ballast water in the body 10 may inject air during drainage through the drain line 180 to remove foreign substances attached to the inside of the body 10.

That is, as shown in Figures 4, 5 and 13, the air injection to inject air toward the inside of the body 10 from the top of the body 10, that is, the upper surface 130 of the body 10 Part 190 (which is connected to a compressor or the like for providing air or compressed air to inject air or compressed air into the body 10, and may include a control opening and closing valve for adjusting the injection) In this case, air (or compressed air) is injected into the body 10 through the air injection unit 190 at the time of draining (discharging) the ballast water in the body 10 through the drain line 180. 10 allows the ballast water in 10 to be quickly discharged through the drain line 180. The ballast water accumulated in the filtration chamber 162 due to the air injection through the air injection unit 190 passes through the filter 20 and passes through the ballast water inlet hole 141 under the filter 20. ) To be finally discharged through the drain line 180. At this time, the effect that the foreign matter attached to the inner surface of the body 10 can be discharged together from the inner surface by the pressure in accordance with the air injection by the air injection unit 190 can also be expected. In addition, the air injection unit 190 is used as a configuration to inject a separate compressed air, but if necessary discharge the ballast water discharged through the drain line 180 by discharging the air in the body (10) Configurations such as vents can also be utilized to facilitate the operation.

In addition, in another embodiment of the present invention to more fundamentally solve the back pressure is formed in the discharge pipe 331 and / or the back washing line 332, as shown in Figure 7 the back washing line 332 Including a back pressure prevention tank 333 on the back, the back washing water and the foreign matter of the back washing line 332 is primarily stored in the back pressure preventing tank 333 to increase the back pressure on the back washing line 332. It can be prevented.

The back pressure prevention tank 333 has a configuration such as a storage tank forming an internal space capable of storing water, and is located in the middle of the back washing line 332. Therefore, the backwashing water and the foreign matter, which were moved along the backwashing line 332, are introduced into the back pressure preventing tank 333 in the middle and temporarily stored. That is, in the case of the conventional case in which only the back washing line 332 is formed long, the back washing water and the foreign matter, which are moved along the back washing line 332, are weakened in the flow moving along the back washing line 332. It is accumulated in the pipeline of the instant back washing line 332 to increase the rate of blocking the pipeline of the back washing line 332 and thereby increase the pressure in the back washing line 332, that is, the back pressure, as in the present invention By forming a separate back pressure preventing tank 333 in the middle of the washing line 332, the backwash water and the foreign matter flowing through the back washing line 332 is temporarily stored in the back pressure preventing tank 333 in the middle, As in the prior art, it is quickly moved from the back washing line 332 to the back pressure prevention tank 333 without being stuck in the middle of the long back washing line 332, thereby preventing the back washing line 332 from being blocked. Even if the back pressure does not increase It can be prevented.

As shown in FIG. 7, the back pressure preventing tank 333 is formed such that the outlet 3332 is discharged lower than the inlet 3331 to allow the backwashing water to flow into the tank, and thus, the back pressure preventing tank 333. The water level can be maintained lower than the inlet (3331), the backwash water flowing into the back pressure prevention tank 333 in the back washing line 332 through the inlet (3331) can be moved smoothly without clogging. The back pressure can be prevented from increasing so much in advance.

In addition, the back pressure prevention tank 333 artificially includes a water level measuring sensor 3333 for measuring the water level in the tank, and a backwash water stored in the tank when the water level measured by the water level measuring sensor 3333 is greater than or equal to a predetermined height. It is possible to include a pump 3334 operating to allow for faster discharge, to maintain the water level in the tank below a certain height at all times to prevent an increase in back pressure on the backwash line 332. That is, the present invention is provided with a water level measuring sensor (3333) for measuring the water level in the tank separately in the back pressure prevention tank 333, through which the water level in the tank is a certain height (usually the same as the height of the inlet 3331) If the height rises above) by detecting this to operate the pump 3332 installed in the outlet 3332 line to allow the backwash water, etc. stored in the tank to be discharged faster through the outlet 3332 artificially, the tank By maintaining the water level does not rise above a certain height it can be prevented in advance so that the back pressure does not increase by that much.

In addition, in the present invention, the components of the automatic washing unit 30 are frequently used with the body 10 or the filter 20 in the process of operating the automatic washing unit 30 to backwash the foreign matter attached to the filter 20. It may include technical configurations that can be more fundamentally prevented from being damaged due to a bump or the like. That is, in the present invention, as shown in FIGS. 4 and 8, a position lower than one side of the core 322 of the suction part 320, that is, the lowermost suction rod 321 attached to the core 322, and / or A separate stopper 3221 is provided at a position higher than the uppermost suction rod 321 attached to the core 322, so that when the stopper 3221 contacts the body 10, By limiting the shankdong to prevent the suction rod 321 is damaged by hitting the body (10).

As described above, the suction part 320 moves the core 322 in conjunction with the rotation and the shankdong of the drive shaft 312 so as to backwash the foreign matter attached to the inner peripheral surface of the filter 20. The suction rod 321 attached to the to be able to suck the foreign matter attached to the inner circumferential surface while rotating and moving the inner circumferential surface of the filter 20, when the core 322 is excessively moved up and down the core ( The suction rod 321 located at the bottom of the 322 may hit the body 10, that is, the partition wall 140 of the filtration chamber 162, or the suction rod 321 located at the top of the core 322. ) Hits the body 10, that is, the upper surface 130 of the post-filtration chamber 162 to cause a problem of damage, in order to prevent this more fundamentally, the core of the suction unit 320 One side of the 322, that is, the lowermost suction rod 321 attached to the core 322 In the lower position (see FIG. 8), a separate stopper 3221 is provided so that the stopper 3221 contacts the body 10, that is, the partition wall 140, while the core 322 moves downward. By limiting the shankdong of the core 322 to prevent the suction rod 321 is damaged by hitting the body (10). For reference, in FIG. 4, an example in which the stopper 3221 is provided at a position higher than the uppermost suction rod 321 attached to the core 322 is not illustrated, but the stopper 3221 may be used as a core. It may be further formed at a position higher than the uppermost suction rod 321 attached to 322. In this case, the stopper 3221 is in contact with the partition wall 140 and / or the upper surface 130 is necessary to prevent damage due to the contact, for this purpose in the present invention as shown in FIG. In addition to installing a separate bushing 143 on the partition wall 140 to which the stopper 3221 comes into contact, the stopper 3221 is formed of a metal material and the bushing 143 is made of a non-metal material, in particular, a self-lubricating plastic, By forming a plastic material such as polypropylene (PP) or nylon, it is possible to prevent the stopper 3221 or the partition wall 140 (or the bushing 143) from being damaged even after frequent contact and bumping.

4 and 9, in addition to the contact means 313 and the pair of first limit switches 314 of the driving unit 310 described above, a pair of the first limit may be further provided. The contact means 313 further includes a pair of second limit switches 315 spaced upward and downward from the switch 314 so as to set a Shanghai copper limit section of the core 322 of the suction part 320. In the case of moving beyond the separation interval of the first limit switch 314 is detected by the second limit switch 315 by double limiting the movement of the core 322 of the suction unit 320 The suction part 320, more specifically, the suction rod 321 may be prevented from being damaged by hitting the body 10.

That is, as described above, in the driving unit 310, in order to specify the distance between the driving shaft 312, a separate contact means 313 is attached to the drive shaft 312, the contact means 313 A pair of first limit switches 314 spaced vertically and spaced apart from each other (W1, which corresponds to the shank dong spacing of the drive shaft 312) by placing the gap between the drive shafts 312 When the contact means 313 is in contact with the lower first limit switch 314 to change the direction of movement in the upward movement, on the contrary, the contact means 313 is in contact with the upper limit switch 314 In this case, an abnormality caused by frequent contact between the contact means 313 and the first limit switch 314 or an abnormality of a control signal of a controller (not shown) is adopted. The contact means 31 for 3) may continue to move beyond the first limit switch 314, and if this occurs, the suction rod 321 of the suction unit 320 hits the body 10 and is damaged. In the present invention, as shown in FIG. 9, the upper and lower portions of the pair of first limit switches 314 may be further added to the first limit switch 314 as shown in FIG. 9. The second limit switch 315 is disposed to be further spaced apart from each other (in this case, the interval W2 between the second limit switch 315 is the suction rod 321 of the core 322 is the body 10 It should be within the range that does not touch). As described above, the second limit switch 315 located above the pair of second limit switches 315 is higher than the first limit switch 314 located above the one of the pair of first limit switches 314. The second limit switch 315 is disposed further apart from each other, and the second limit switch 315 located below the pair of second limit switches 315 is positioned below the first limit switch 314 of the pair of first limit switches 314. 9, the contact means 313 continuously moves downward beyond the lower first limit switch 314, as illustrated in FIG. 9. When the 313 contacts the lower second limit switch 315, the second limit switch 315 transmits the contact signal to a controller (not shown) so that the driving shaft 312 is provided with the contact means 313. This can be controlled so that it no longer moves downward. In this case, the circuit in which the second limit switch 315 is connected to a controller (not shown) forms a separate circuit separate from the circuit in which the first limit switch 314 is connected to a controller (not shown). Even if the contact means 313 continues to move beyond the first limit switch 314 due to a circuit abnormality between the first limit switch 314 and the controller (not shown), the second limit switch 315 may be used. When the circuit between the control unit (not shown) operates normally and the contact means 313 contacts the second limit switch 315, the second limit switch 315 transmits the contact signal to the control unit (not shown). The drive shaft 312 to which the contact means 313 is attached is to be controlled so as not to move any more.

In addition, the second limit switch 315 is positioned to face the first limit switch 314, so that the second limit even when the separation distance between the first limit switch 314 and the second limit switch 315 is narrow. The switch 315 may allow the contact means 313 to be detected accurately. That is, if the second limit switch 315 is spaced up and down at the same position as the first limit switch 314, if the second limit switch 315 is not sufficiently spaced apart from the first limit switch 314, After the contact means 313 passes the first limit switch 314 and before the second limit switch 315 contacts, the interference between the first limit switch 314 and the second limit switch 315 already occurs. Therefore, the second limit switch 315 may not be able to accurately detect the contact means 313. Therefore, as illustrated in FIG. 9, the second limit switch 315 may be replaced by the first limit switch ( By placing it in a position opposite to 314, the gap between the second limit switch 315 and the first limit switch 314 is narrow (that is, the suction rod 321 is the most suitable for backwashing the filter 20). Body at the low or highest position ( 10, the second limit switch 315 is able to accurately detect the contact means 313 without interference with the first limit switch 314, even if the separation interval with the narrow), the suction rod 321 is the body ( It is possible to prevent double damage accurately by hitting 10).

In addition, in the present invention, as shown in Figures 4 and 10, the diameter (L1) of the suction port (3211) in the suction rod 321 lead length (L2) moving up and down while the suction rod 321 is rotated once Is greater than or equal to), it is possible to increase the filter backwashing efficiency and to prevent damage to the suction rod 321 by leaving the portion that does not backwash the foreign material while the suction rod 321 is rotated.

That is, the suction rods 321 which are radially attached to the core 322 at a predetermined interval are interlocked according to the rotation and the shank of the core 322 to remove foreign substances attached to the inner circumferential surface of the filter 20. In the suction backwashing process, as shown in (1) of FIG. 10, the lead length L2 at which the suction rod 321 moves upward while being rotated once is an inlet at which the foreign substance is sucked from the suction rod 321. When the suction port 321 is larger than the diameter L1, the suction rod 321 is rotated by the length of the lead length L2 which is moved upward while the suction rod 321 is sucked by subtracting the length of the suction port diameter L1. In addition, the foreign matter attached to the inner circumferential surface of the filter is not sucked and still remains, and the suction surface of the filter 20 sucked by the suction rod 321 does not overlap while the suction rod 321 moves one lead. Continued to suction surface of filter 20 where suction rod 321 passed Due to the filtration process (the filtration process continues without interruption during the backwashing process), the foreign matter is attached again, so that the foreign matter remaining when the suction rod 321 is rotated downward in the future (these foreign substances are sucked in the suction rod) (321) will continue to attach more during the inhalation process, so that the adhesion thickness of the foreign matter becomes large) and the newly attached foreign matter hit the suction rod 321, so if the process is repeated repeatedly It causes a problem that the damage or damage of the rod 321 is more likely to occur, and the filtration efficiency is lowered due to the foreign matter attached to the filter.

Therefore, in the present invention, as shown in (2) of FIG. 10, the lead length for moving the diameter L1 of the suction port 3211 in the suction rod 321 upward while the suction rod 321 rotates once ( By forming approximately equal to or larger than L2), the lead length L2 of which the suction rod 321 moves upward while making one rotation in the process of operating the automatic washing unit 30 to remove foreign substances in the filter 20 is performed. Since the suction rod 321 forms an interval equal to or smaller than the diameter L1 of the suction port 3211, which is an inlet for the foreign substance to be sucked in, the suction rod 321 moves while rotating one rotation upwards. The suction rod 321 is sucked when the diameter L1 of the suction port 3211 is formed larger than the lead length L2. The suction surface of the filter 20 is superimposed so that the suction surface of the filter 20 is not backwashed on the inner peripheral surface of the filter 20. If there is no part present in the state attached to the material or is superimposed suction, thus, when the suction rod 321 is lowered while rotating downward in the future, the suction rod 321 collides with the foreign matter remaining as in the prior art Since it is also prevented in advance, in the process of backwashing the filter 20 in each filtration unit, the suction rod 321 for sucking the foreign matter can be prevented from being damaged or damaged by frequent collisions with the foreign matter, the filter It is possible to minimize the adhesion of foreign substances to the filtration efficiency is increased.

In addition, in the present invention, as shown in Figure 11, the distance (L4) between the plurality of suction rods 321 connected to the core 322 is equal to or greater than the shankdong interval (L5) of the core 322 By forming small, the filter rinsing efficiency and the filtration efficiency to increase the filter back-washing efficiency and filtration efficiency by not leaving a portion that does not backwash the foreign matter between the suction rod 321 and the suction rod 321 during the core 322 321 may be prevented from being damaged.

That is, when the gap L4 between the plurality of suction rods 321 connected to the core 322 is larger than the shank east gap L5 of the core 322, the foreign matter backwashing in the filter 20 is performed. In order to move the core 322 to the upper side for the purpose, there is a foreign substance that is not sucked and still remains in a predetermined region of the filter 20 between the suction rod 321 and the suction rod 321, which is a core 322 in the future. ) And the suction rod 321 hits the remaining foreign matter in the process of moving to the lower side, if this process is repeated repeatedly, the problem that the suction rod 321 breakage or damage is more likely to occur and the filtration efficiency As the present invention causes a problem of dropping, the distance L4 between the plurality of suction rods 321 connected to the core 322 as compared to the shankdong spacing L5 of the core 322 By forming the same or smaller, the core 322 is upward While moving, the predetermined area of the filter 20 backwashed between the suction bar 321 and the suction bar 321 is overlapped so that foreign matter does not leave a portion of the filter 20 that is not backwashed, and thus, the core 322 in the future. If the suction rod 321 collides with the foreign substance remaining in the case of moving to the lower side, it is also prevented in advance to suck the foreign substance in the process of backwashing the filter 20 in each filtration unit. 321 may be prevented from being damaged or damaged due to frequent collisions with the foreign matter remaining, and the problem of inferior filtration efficiency.

In addition, in the present invention, as shown in Figures 4 and 12, the first pressure sensor 40 for measuring the pressure inside the body 10, and is provided for each filtration unit inside the filter 20 of each filtration unit Including the second pressure sensor 50 for measuring the pressure of the, under the control of a controller (not shown), the automatic washing unit 30 in sequence for each filtration unit in which the pressure inside the body 10 and a differential pressure of a predetermined range or more occurs ) To prevent back pressure increase during the backwashing of foreign matter, so that backwashing can be performed smoothly.

That is, conventionally, as shown in FIGS. 1 and 2, the ballast water is simply introduced into the body 10, that is, the pressure at the inlet (see the inlet pressure sensor d in FIGS. 1 and 2) and the body ( 10) measure the pressure at the outlet (i.e. the outlet pressure sensor (e) in Figures 1 and 2) at which the ballast water is discharged to the outside, and when the differential pressure between them becomes large (i.e. When the pressure at the inlet is increased compared to the pressure), since the automatic washing unit has been operated in such a manner as to operate the automatic washing unit for backwashing the foreign matter in the filter 20, this method is applied to the plurality of filtration units in the body 10. When applied to the present multi-cage type ballast water filtration as it is, since the back washing operation by the automatic washing unit 30 is always performed at the same time in a number of filtration units, at the same time a plurality of filtration units in the back washing operationWhen the backwash water or foreign substances sucked at the same time are discharged through the discharge pipe at once, the flow rate and the foreign matter of the backwash water moving in the pipeline of the discharge pipe increase rapidly, and the flow rate increases or the foreign matter blocks the pipeline of the discharge pipe. The back pressure is increased to thereby cause a problem that the backwashing operation of the foreign matter in the automatic washing unit 30 does not proceed smoothly.

Accordingly, in the present invention, as shown in FIG. 12, the second pressure sensor is installed for each of the plurality of filtration units disposed in the body 10 of the filtration device to measure the pressure inside the filter 20 of each filtration unit ( 50), the first pressure sensor 40 for measuring the pressure inside the post-filtration chamber 162 just before discharge after the filtration process is completed, the post-filtration chamber 162 in the upper surface 130 of the body 10 in the figure An example of measuring the internal pressure is shown, but the pressure measured by the outlet portion 120 of the body 10 may be measured, and the filter of each filtration unit measured by the second pressure sensor ( 20) Since the internal pressure is individually prepared, the foreign material backwashing operation is automatically performed by the automatic washing unit 30 only for the filtration unit whose differential pressure exceeds a predetermined range, so that the suction of the discharge pipe 331 is carried out at once. Backwash water or foreign objects It can be prevented, and accordingly the flow rate is increased at once in the channel of the discharge pipe 331, or closed it is possible to solve the problem of back pressure increase. That is, assuming that four filtration units are arranged in one body 10 in the present invention, the back washing operation by the automatic washing unit 30 proceeds simultaneously in four filtration units in a conventional manner. When the discharge pipe 331 is discharged, movement of concentrated backwash water and foreign matters is concentrated in the pipe of the discharge pipe 331, and thus, the pipe of the discharge pipe 331 is frequently blocked (that is, the back pressure is excessively increased. However, as in the present invention, when the backwashing operation is performed by the automatic washing unit 30 in sequence for the filtration unit separately over a predetermined range as in the present invention, the backwash water and the pipes of the discharge pipe 331 at once Foreign matters are not concentrated, but the backwash water and foreign matters, which are moved from each filtration unit, are dispersed and introduced into the pipeline of the discharge pipe 331, so that the pipeline of the discharge pipe 331 is blocked at once. And the back pressure is instantly increased to thereby prevent the phenomenon that the back washing operation can smoothly be made can be effectively prevented.

As shown in FIG. 12, the second pressure sensor 50 penetrates the upper cover plate 170 which blocks the upper portion of the body 10, that is, the filter inlet hole 131 of the upper surface 130. Since the pressure inside the filter 20 is measured through the measuring hole 173, repair and replacement of the second pressure sensor 50 may be performed even by dismantling only the upper cover plate 170. It can be done. The second pressure sensor 50 installed as described above directly penetrates the upper surface 130 of the body 10 to measure the pressure inside the post-filtration chamber 162 or at the outlet 120 of the body 10. The pressure measured at the first pressure sensor 40 measuring the pressure of the pressure difference is compared. As the first pressure sensor 40 and the second pressure sensor 50, a transmitter for measuring pressure, a pressure sensor, a differential pressure switch, or the like may be used.

For reference, in the present invention, by installing a separate pressure sensor on the inlet 110 side of the body 10 may measure the pressure inside the filtration chamber 161, as described above separately installed on the inlet 110 side. The pressure inside the filtration chamber 161 measured by the pressure sensor may be referred to as the overall average of the pressures in each filtration unit (or the second pressure sensor 50 measured the pressure in each filtration unit). It is also possible to calculate the average of the values), if the measured pressure inside the pre-filtration chamber 161 is outside the predetermined range and the pressure inside the post-filtration chamber 162 measured by the first pressure sensor 40 When the differential pressure is displayed, the pressure difference in the body 10 has reached a dangerous level. At this time, the pressure difference in the body 10 is adjusted to maintain a stable level by performing the backwashing process at the same time in all filtration units. It is.

In addition, in the present invention, as shown in Figures 4, 15 and 17, the upper side of the filter 20 is coupled to the upper surface 130 of the body 10, the lower side of the partition wall of the body (10) It is coupled to the 140, and the upper and lower ends of the filter 20 has a form that is attached to the seat 210 is seated in direct contact with the body 10.

However, referring to FIG. 16, in the conventional case, in order to maintain the airtightness of the coupling portion between the upper side of the filter 20 and the body 10 as described above (the coupling portion between the lower side of the filter 20 and the body 10). The same may be applied to maintain airtightness), the upper cover plate 170 that covers the filter inlet hole 131 formed on the upper surface 130 of the body 10, the sheet 210 directly above the filter 20 Rather than being in direct contact with the downwardly protruding piece 171 of), a separate rubber packing f, as shown in FIG. 16, is formed between the upper sheet 210 of the filter 20 and the downwardly protruding piece 171. 단면 'form a cross-section), and more specifically, the sheet 210 is covered with a separate rubber packing (f). However, in such a conventional structure, as the foreign matters are attached to the inner peripheral surface of the filter 20, the pressure inside the filter 20 becomes high and the pressure outside the filter 20 becomes relatively low. As the pressure of the ballast water trying to escape from the inside of the filter 20 is increased, the pressure at which the ballast water tries to escape through the coupling portion between the upper side of the filter 20 and the body 10 is also increased. (20) The phenomenon in which the rubber packing f covering the upper sheet 210 is peeled out of the filter 20 by the pressure often occurs, and the rubber packing f is removed. A problem arises in that the unfiltered ballast water inside the filter 20 leaks to the outside of the filter 20 as it is through the upper gap (of course, the same problem also occurs under the filter 20).

Therefore, in the present invention, in order to solve the problem according to the coupling structure between the conventional filter 20 and the body 10 as described above, as shown in Figures 4 and 15, the sheet 210 and the upper side of the filter 20 and A separate O-ring 60 is placed on the contact surface between the downwardly protruding pieces 171 of the upper cover plate 170 of the body 10, so that the filter 20 is controlled by the filtration pressure (that is, the pressure difference between the inside and the outside of the filter 20). It is possible to prevent the ballast water from flowing into the contact surface gap between the filter 20 and the body 10, that is, the downward protrusion 171 of the upper cover plate 170.

That is, in the present invention, instead of the rubber packing f covering the sheet 210 of the filter 20 as in the prior art, the sheet 210 fixed to the filter 20 is directly the body 10, that is, the upper portion. By contacting the downward projection 171 of the cover plate 170, but by placing a separate O-ring 60 on the contact surface between the sheet 210 and the downward projection 171 of the upper cover plate 170, The ballast water before filtration inside the filter 20 by the O-ring 60 flows out of the filter 20 through a contact surface gap between the sheet 210 and the downwardly protruding piece 171 of the upper cover plate 170. Will be prevented. Since the O-ring 60 is located in the recessed groove formed in the sheet 210 or the upper cover plate 170, the downward protrusion 171, the conventional rubber packing () even in the filtration pressure inside the filter 20 As shown in FIG.

In this case, in particular, in the upper side of the filter 20, the O-ring 60 is inserted into the O-ring groove 172 formed in the downwardly protruding piece 171 of the upper cover plate 170, as shown in FIG. 15. By taking the, it is possible to easily replace the O-ring 60 by removing only the upper cover plate 170, it characterized in that to easily perform the O-ring 60 replacement.

That is, the O-ring 60 included to maintain the airtightness of the upper portion of the filter 20 as described above is inserted into the O-ring groove 172 formed in the downward protrusion piece 171 of the upper cover plate 170. If possible, when the replacement or maintenance work for the O-ring 60, the upper cover plate 170 is only to separate from the body 10, the downward projection piece of the upper cover plate 170 Since the O-ring 60 located in the O-ring groove 172 formed in the can be easily separated and replaced, the O-ring 60 can be replaced in a short time and the convenient operation can be performed. If it is assumed that the O-ring groove 172 is formed on the surface of the sheet 210 on the upper side of the filter 20, unlike in FIG. 15, the upper cover plate 170 for the replacement of the O-ring 60 In addition to the separation of the filter 20 in addition to the operation to be pulled out in the body 10 must be further proceeded (even if, even if the replacement operation of the O-ring 60 without the filter 20 is not removed, This is because the worker must go up to the upper side of the body 10 and work through the inside of the filter inlet hole 131. It is obvious that this is not easy), replacement or maintenance of the O-ring 60 will have a much more complicated and time-consuming problem. Therefore, in the present invention, by forming the O-ring groove 172 to be fixed to the O-ring 60 as described above in the downward protrusion piece 171 of the upper cover plate 170, the convenience and speed of the replacement operation It can be secured.

In addition, unlike the upper side of the filter 20 in the present invention, as shown in FIG. 17 below the filter 20, the seat 210 under the filter 20 is the partition wall 140 of the body 10. Is in contact with the protruding piece 142 surrounding the ballast inlet hole 141 formed therein, wherein the O-ring 60 is formed in the second O-ring groove 211 formed in the seat 210 under the filter 20. By taking the structure to be inserted, it is possible to easily replace the O-ring 60 by removing only the filter 20, it is possible to easily perform the replacement of the O-ring 60 of the lower side of the filter 20.

That is, unlike the upper side of the filter 20, the seat 210 attached to the lower side of the filter 20 protrudes around the ballast inlet hole 141 in the partition wall 140 of the body 10. In contact with the protruding piece 142 is formed to be coupled, wherein the O-ring 60 included for airtightness in the contact surface between the sheet 210 and the protruding piece 142 below the filter 20 is firmly When the second O-ring groove 211 which is formed to be seated and fixed is formed to be recessed to the seat 210 surface of the lower side of the filter 20, the replacement of the O-ring 60 under the filter 20 is performed. The O-ring located in the second O-ring groove 211 recessed in the seat 210 surface below the filter 20 when only the filter 20 is separated from the body 10 when the maintenance work is required. 60) can be easily removed and replaced, so the O-ring (60) can be replaced in a short time and is convenient. You will be able to proceed with this work. It is assumed that the second o-ring groove 211 is formed on the surface of the protruding piece 142 protruding from the ballast inlet hole 141 in the partition wall 140 of the body 10 unlike in FIG. 17. In this case, only the separation of the upper cover plate 170 and the filter 20 is insufficient for the replacement of the O-ring 60 positioned below the filter 20, and additionally, the suction part 320 in the body 10 is disposed. In addition, since the operator must enter the narrow body 10 and perform the replacement work in the body 10, the replacement or maintenance of the O-ring 60 located below the filter 20 is more complicated. And you will have a lot of time-consuming problems. Accordingly, in the present invention, by replacing the second O-ring groove 211 to be fixed to the seat 210 surface of the lower side of the filter 20, the O-ring 60 in the lower position of the filter 20 as described above, the replacement For the operation, if only the filter 20 is pulled out from the body 10 to the outside, the O-ring 60 attached thereto can be easily replaced from the outside, thereby ensuring convenience and speed.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Should be interpreted as belonging to the scope.

10: Body
110: inlet 120: outlet 130: upper surface 131: filter inlet
140: partition 141: ballast water inlet 142: protrusion 143: bushing
150: lower surface 151: pedestal 161: pre-filtration chamber 162: post-filtration chamber
170: upper cover plate 171: downward projection 172: O-ring groove 173: pressure measuring hole
180: drain line 181: control valve 190: air inlet
20: filter
210: seat 211: second O-ring groove
30: automatic cleaning unit
310: driving unit 311: driving motor 312: driving shaft
313: contact means 314: first limit switch 315: second limit switch
320: suction part 321: suction rod 3211: suction port 322: core 3221: stopper
330: discharge portion 331: discharge pipe 3311: exhaust valve
332: back washing line 3321: second drain line 33211: second control valve
3322: second air injection unit
333: back pressure prevention tank 3331: inlet 3332: outlet
3333: level sensor 3334: pump
40: first pressure sensor 50: second pressure sensor
60: O-ring
* Code related to the prior art
a: drive part b: discharge part c: piping line
d: Inlet pressure sensor e: Outlet pressure sensor f: Rubber packing

Claims (4)

In the multi-cage type ballast water filtration device is packaged and connected to a plurality of filtration units in the body having the inlet and the outlet that the ballast water flows in and out,
The filtration unit includes a filter for filtering the ballast water flowing through the body, and an automatic washing unit for backwashing the foreign matter attached to the filter,
The automatic washing unit includes a driving unit for driving the automatic washing unit according to a signal from the control unit, a suction unit connected to the driving unit to suck foreign substances attached to the filter, and a discharge unit for discharging foreign substances sucked from the suction unit; ,
The discharge part is a discharge pipe which is a passage for discharging foreign substances is located in the lower portion of the body to form a back washing line,
A second drain line is formed below the backwash line, and when the operation of the filtration device is stopped, the ballast water in the backwash line is drained to the second drain line to drain the ballast water in the backwash line. Multi-cage type ballast water filtration device to increase the durability of the backwash line, characterized in that to prevent corrosion. The method of claim 1,
The discharge portion is multi-cage type ballast water filtration device for increasing the durability of the back washing line, characterized in that the discharge pipe of the plurality of filtration unit is formed in communication with one back washing line at the bottom of the body. 3. The method of claim 2,
A second air injection unit is disposed on the discharge pipe to inject air into the discharge pipe, and injects air when draining the ballast water inside the backwash line through the second drain line to remove foreign substances attached to the inside of the discharge pipe. Multi-cage type ballast water filtration device to increase the durability of the backwash line. The method of claim 1,
The suction part is provided with a stopper on one side of the core that is connected to the suction rod for sucking the foreign matter attached to the filter and acts as a rotating shaft for rotating the suction rod, to limit the movement of the core when the stopper is in contact with the body Multi-cage type ballast water filtration device to increase the durability of the backwash line, characterized in that to prevent the suction rod is damaged by hitting the body.

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