KR102447756B1 - Underdrain system with stable watertight structure and uniform dispersion structure - Google Patents

Abstract

The present invention relates to an underdrain apparatus. The purpose of the present invention is to provide an underdrain apparatus capable of realizing a uniform flow structure of a fluid by easily arranging a filter medium support plate in the right position when the filter medium support plate is arranged on the top of perforated blocks. To this end, the present invention provides the underdrain apparatus comprising: a plurality of perforated blocks each of which has a water supply chamber and a distribution chamber formed therein and is installed on the bottom of a filtering structure to receive a fluid; and a filter medium support plate assembled on the top of each of the perforated blocks. Provided is a dimple-type underdrain apparatus with a stable watertight structure and a uniform dispersion structure of perforated blocks, in which a mounting end for supporting the edge of the lower surface of the filter medium support plate at the lower part is formed on the upper surface of the perforated block, a protection step facing the lateral surface of the filter medium support plate is formed on the outer side circumference of the mounting end, a plurality of guide baffles are formed to protrude partially on the lateral surface of the inner side of the protection step wherein the guide baffles are in contact with the lateral surface of the filter medium support plate and allow the lateral surface of the filter medium support plate to be spaced from the lateral surface of the inner side of the protection step, a sealing groove is further formed on the top of the mounting end, wherein the sealing groove is positioned at a connection portion of the protection step and the mounting end on the top of the mounting end while being extended along the circumference of the mounting end and forming one sealing space connected to another sealing space formed among the guide baffles, the filter medium support plate and the protection step, and the sealing groove is composed of a first groove with a relatively low depth and a second groove with a relatively deep depth to be formed so as to have a two-stage stepped structure.

Description

A dimple-type lower water collecting device having a stable watertight structure and a uniform dispersion structure of a perforated block {Underdrain system with stable watertight structure and uniform dispersion structure}

The present invention relates to a lower water collecting device, and more particularly, by improving the structure of the filter media support plate and the perforated block, the backwashing fluid can be uniformly dispersed while the filter media support plate is positioned in the correct position, and between the filter media support plate and the perforated block. A chin is formed at the upper end of the perforated block so that the sealing material to be installed forms a band of a certain shape, so that the sealing material to be installed between the filter paper support plate and the perforated block is uniformly constructed around the filter paper support plate and to be connected as a whole so that the filter paper support plate and the The present invention relates to a lower water collecting device in which a stable watertight structure is formed between perforated blocks and through which a backwash fluid can be uniformly dispersed.

In general, a water purification plant refers to a facility that receives raw water supplied through water intake and water treatment facilities and purifies it to a quality suitable for drinking. Settling paper for sedimentation by natural sedimentation of the floc formed in the paper by gravity, filter paper for separating fine particles by allowing raw water to pass through a filter medium (silent filter paper, activated carbon filter paper), and disinfectant such as chlorine for final purification This includes purified water supplied by

On the other hand, raw water flowing into the filter paper flows into the upper part of the filter paper, passes through a filter medium layer made of filter media such as sand, activated carbon, anthracite, etc.

The lower water collecting device is mainly used in a wheeler ball type, a strainer type, a perforated block type, a perforated plate type, etc., and the height (thickness) of the filter media layer to enable high filtration speed and containment of many suspended substances in the same area. The perforated block type, which allows effective washing process and stable water quality maintenance by simultaneous backwashing of water and air, is widely used for deep filter papers with increased air quality.

The perforated block-type lower water collecting device includes a perforated block having a dispersion chamber and a water supply chamber formed therein, and a plurality of perforated blocks are directly connected at the bottom of the filter paper to form a water collecting structure, but the plurality of water collecting structures are located at the bottom of the filter paper. A plurality of perforated blocks to be formed side by side are connected in series and arranged in parallel.

This perforated block-type lower water collecting device has an equalization effect due to the structure of a two-stage orifice (the primary orifice of the water supply room and the second orifice of the dispersion room), and a planar uniform filtration by the plurality of water collecting holes formed on the upper surface of the perforated block. and backwashing effect, and has the advantage of being able to backwash with air alone, backwash with water alone, and backwash with water and air simultaneously.

Due to the above advantages, the perforated block-type lower water collecting device is applied to most of the deep filter papers provided with the deep-structured filter media layer, and accordingly, the load and internal pressure applied to the perforated block during backwashing are also increasing.

On the other hand, a perforated plate is assembled on the upper part of the perforated block constituting the perforated block-type lower water collecting device, and an assembly structure for preventing the perforated plate from being separated from a predetermined position is formed at the upper end of the perforated block.

More specifically, the upper end of the perforated block is formed in the shape of a rectangular border, and facing the side of the perforated plate, a protective jaw preventing the perforated plate from being separated is formed to protrude upward, and the perforated plate is formed inside the protective jaw. A mounting end is formed to be seated on the upper end of the perforated block while being spaced apart from the upper surface of the perforated block.

The perforated plate is seated inside the space formed by the mounting end and the protective jaw, and a sealing material is installed in the gap formed between the perforated plate and the perforated block. This will prevent loss or air leakage.

In manufacturing the perforated block and the perforated plate having the structure to be assembled with each other as described above, in order to improve the assembling of the perforated plate and to allow the sealing material to be installed between the perforated plate and the perforated block to be constructed with a sufficient thickness. is made to a size smaller than the space formed by the guard, so that sufficient space is formed between the perforated plate disposed inside the guard and the guard.

However, as described above, if the perforated plate is made in a small size so that sufficient space is formed between the perforated plate and the guard, the perforated plate can be removed from the inside of the guard according to the skill level of the operator in the process of assembling the perforated plate to the perforated block. There may be a case where the arrangement is biased in one direction, and in this case, one side of the perforated plate is excessively closely attached to the guard, and a space for installing the sealing material to a sufficient thickness is not secured.

On the other hand, if the thickness of the sealing material is less than the appropriate value, the sealing material cannot withstand the deformation and restoration of the perforated block due to the water shock generated during the inflow of the backwashing fluid and the load applied to the perforated block from the filter material layer. As a result, a gap is generated between the perforated plate and the perforated block, and there is a problem in that the filter material is lost and the fluid (air + water) is leaked.

In addition, in the prior art, the sealing material installed between the side surface of the perforated plate and the inner surface of the guard and the sealing material installed between the bottom surface of the perforated plate and the upper surface of the mounting end are connected to each other, and there are many cases that do not have a double sealing and an integrated structure. There is a problem that the possibility of occurrence is high and the binding force of the perforated plate is relatively low.

Registered Patent Publication No. 10-2256977 (2021.05.27. Announcement)

The present invention has been made in consideration of the above problems, and an object of the present invention is to easily place the filter media support plate in the correct position in disposing a perforated block having an equal effect due to the two-stage orifice structure and the filter media support plate on the upper part of the fluid. The purpose of this is to provide a lower water collection device that enables the implementation of an even flow structure of

Another object of the present invention is to provide a lower water collecting device in which the sealing material to be constructed between the filter media support plate and the guard and between the filter media support plate and the mounting end is connected to each other and integrated.

Another object of the present invention is to provide a lower water collecting device in which air ejected from a perforated block is ejected at a uniform pressure in various places.

The present invention, which achieves the object as described above and performs the task for eliminating the conventional drawbacks, includes a plurality of perforated blocks having a water supply and a dispersion chamber formed therein and installed at the bottom of a filtration structure to receive a fluid, and each In the lower water collecting device comprising a filter media support plate assembled on the upper part of the perforated block of the perforated block, a support end for supporting the bottom edge of the filter media support plate from the bottom is formed on the upper surface of the hole block, and a filter media support plate is formed around the outer periphery of the support end. A protective jaw is formed to prevent the separation of the filter media support plate while facing the side of the protective jaw, and the side of the filter media support plate is in contact with the side of the filter media support plate on the inner side of the protective jaw to maintain a state spaced apart from the inner side of the protective jaw A plurality of guide baffles are formed to partially protrude, are located at the connection portion between the protective jaw and the support end on the upper surface of the support end, and extend along the circumference of the support end, and are formed between the guide baffle, the filter media support plate, and the protective jaw. A sealing groove forming another sealing space connected to the sealing space formed in the junction is further formed on the upper surface of the mounting end, and the sealing groove is composed of a first groove having a relatively low depth and a second groove having a relatively deep depth. Provided is a dimple-type lower water collecting device having a stable watertight structure and a uniform dispersion structure of a perforated block, characterized in that it is formed to have a two-step stepped structure.

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Meanwhile, in the dimple type lower water collecting device having a stable watertight structure and a uniform dispersion structure of the perforated block, it is preferable that the first groove is formed to be located closer to the guard than the second groove.

On the other hand, in the dimple-type lower water collecting device having a stable watertight structure and a uniform dispersion structure of the perforated block, it is preferable that the protruding height of the guide baffle is smaller than the distance the second groove is separated from the guard.

On the other hand, in the dimple-type lower water collecting device having a stable watertight structure and a uniform dispersion structure of the perforated block, a plurality of exposed grooves are dispersed on the bottom surface of the filter media support plate so that the internal pores of the filter media support plate are exposed through the bottom surface of the filter media support plate. The exposed groove fills the inside of the mold with synthetic resin grains and applies heat and pressure to form the filter media support plate with a plurality of forming protrusions formed to protrude from the bottom surface of the mold in a columnar shape together with the molding of the filter media support plate. It is desirable to form

On the other hand, in the dimple-type lower water collecting device having a stable watertight structure and a uniform dispersion structure of the perforated block, the partition wall formed inside the perforated block to divide the internal space of the perforated block into a water supply and a distribution room has a four-stage structure due to the height difference. A plurality of primary orifices with The primary orifice is configured to eject water, and the secondary orifice is formed at a position displaced from the primary orifice so as not to be located vertically above the primary orifice so as not to interfere with the flow of fluid in the secondary orifice. do.

On the other hand, in the dimple-type lower water collecting device having a stable watertight structure and a uniform dispersion structure of the perforated block, a filter media layer is formed on the upper part of the lower water collecting device installed on the bottom of the filter structure, and a trough is formed on the upper part of the filter media layer is installed, the filtration structure is connected to a raw water pipe, a discharge pipe, a backwash air pipe, and a backwash pipe, the backwash air pipe is connected to a backwash blower, the backwash pipe is connected to a backwash pump, and the raw water A valve for controlling the flow of fluid is installed in the pipe, the discharge pipe, the backwash air pipe, and the backwash pipe, respectively.

According to the present invention having the above characteristics, the filter media support plate assembled to be seated on the upper part of the perforated block is aligned while the side surface is in contact with the guide baffle, so that the filter media support plate can be more easily aligned in the correct position. It is possible to induce an even flow of the backwashing fluid by using the filter media support plate aligned in position.

In addition, by allowing the sealing material to be constructed with a uniform thickness as a whole between the filter media support plate and the protective jaw, the binding force between the perforated block and the filter media support plate is improved, and the occurrence of gaps is suppressed to prevent the loss of the filter media and leakage of air. An even flow can be induced.

In addition, since the sealing material can be constructed to a sufficient thickness between the filter medium support plate and the supporting end by the sealing groove formed on the upper surface of the supporting end, the binding force between the perforated block and the filter medium supporting plate can be further improved and the occurrence of gaps can be suppressed.

In addition, it is possible to more effectively suppress the occurrence of a gap between the filter media support plate and the perforated block by making the sealing materials constructed between the filter media support plate and the guard sill and between the filter media support plate and the mounting end connected to each other and become integrated.

In addition, a plurality of exposed grooves formed on the bottom surface of the filter media support plate expose the inner voids of the filter media support plate in the direction of the bottom, so that even when the voids on the bottom of the filter media support plate are partially closed, it induces an even flow of fluid throughout the filtration and backwashing. and a decrease in the backwashing effect.

In addition, according to the primary orifice and the secondary orifice having a structure that is displaced from each other, since the ejection pressure of backwash air that is ejected and rises through the primary orifice is not directly transmitted to the secondary orifice, the air layer formed at the top of the dispersion chamber is kept constant. The thickness can be maintained, and through this, the ejection pressure can be maintained uniformly throughout, thereby improving the backwashing effect.

1 is a plan structural view showing a state in which a lower water collecting device according to a preferred embodiment of the present invention is installed on a filtering structure;
2 is a side structural view showing a state in which a perforated block and an air pipe are connected according to a preferred embodiment of the present invention;
3 is a perspective view of a perforated block according to a preferred embodiment of the present invention;
4 is a front view of a perforated block according to a preferred embodiment of the present invention;
5 is a plan view of a perforated block according to a preferred embodiment of the present invention;
6 is an AA` cross-sectional view;
7 is a plan view showing a state coupled to the inside of the guard while the filter media support plate is aligned in the correct position by the guide baffle according to the present invention;
8 is a detailed view of part 'A',
9 is a detailed view showing a state in which a filter media support plate is disposed and a sealing material is constructed in a space formed by a protective jaw and a mounting end according to the present invention;
10 is a front view showing a state in which the structure of the protective jaw and the mounting end according to the present invention is applied to a perforated block having a relatively narrow width;
11 is an internal configuration diagram of a filter media support plate according to a preferred embodiment of the present invention;
12 is an internal structural diagram of a mold used for manufacturing a filter media support plate according to the present invention;
13 is a structural diagram of a filtration structure to which a lower water collection device according to the present invention is applied;
14 is an exemplary view showing a state in which the perforated block according to the present invention is connected to the air pipe at the bottom of the filtration structure.

Hereinafter, preferred embodiments of the present invention will be described in detail in conjunction with the accompanying drawings. In describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a plan structural view showing a state in which a lower water collection device according to a preferred embodiment of the present invention is constructed on a filtering structure, and FIG. 2 is a side structural view showing a state in which a perforated block and an air pipe are connected according to a preferred embodiment of the present invention. 3 is a perspective view of a perforated block according to a preferred embodiment of the present invention, FIG. 4 is a front view of a perforated block according to a preferred embodiment of the present invention, and FIG. 5 is a perforated block according to a preferred embodiment of the present invention 6 is a cross-sectional view A-A`, FIG. 7 is a plan view showing a state in which the filter media support plate is aligned in the correct position by the guide baffle according to the present invention and coupled to the inside of the guard, FIG. 8 is 'A' 9 is a detailed view showing a state in which a filter media support plate is disposed and a sealing material is installed in the space formed by the guard jaw and the mounting end according to the present invention, and FIG. 10 is the guard jaw and the mounting end according to the present invention It shows a front view showing the state in which the structure of is applied to a perforated block having a relatively narrow width.

In the dimple type lower water collecting device having a stable watertight structure and a uniform dispersion structure of the perforated blocks according to a preferred embodiment of the present invention, a plurality of perforated blocks 10 are connected to each other in series at the bottom of the filtration structure, and the water collecting structure 20 and a plurality of water collecting structures 20 are arranged in parallel, and each water collecting structure 20 is connected to an air pipe 31 installed in the filtering structure to receive backwash air, and each perforated block At the upper end of (10), the filter media support plate 40 for supporting the filter media layer is assembled.

As described above, the lower water collecting device configured at the bottom of the filtering structure collects the filtered water filtered through the filter media layer and discharges it to the outside, or provides the function of supplying backwash water and backwash air supplied from the outside to the lower part of the filter media layer.

On the other hand, the perforated block 10 constituting the lower water collecting device according to the present invention is composed of a main body 100 , a reinforcing part 200 , a bulkhead 300 , a mounting end 400 , and a protective jaw 500 .

On the other hand, in explaining the perforated block 10 according to the present invention, the configuration is divided into the main body 100, the reinforcement part 200, the bulkhead 300, the mounting end 400, and the protective jaw 500, but the main body ( 100), the reinforcing part 200, the partition wall 300, the mounting end 400, and the protective jaw 500 are formed in an integrated structure, and may be made of HDPE (High Density Polyethylene) material.

The main body 100 is composed of a structure in the form of a square column in a horizontal posture having an inner space of a square cross-section in which the upper wall 110, the floor 120, and the left and right walls 130 and 140 are coupled to each other, and the inner space is reinforced The unit 200 and the partition wall 300 are divided into two water supply chambers C1 and two distribution chambers C2.

The ribs 150 are further formed on the outer lower end of the main body 100 to increase the strength of the main body 100 and induce a firm bond with the mortar.

The ribs 150 protrude outward of the main body 100 while extending from the left wall 130 to the right wall 140 via the floor 120 on the outside of the main body 100, and a plurality of ribs 150 is formed in a structure spaced apart by a predetermined interval in the longitudinal direction of the body (100).

The reinforcing part 200 completely divides the internal space of the main body 100 into a left space and a right space, and transfers the load applied to the upper wall 110 of the main body 100 to the floor 120 of the main body 100 . to realize a high load structure of the perforated block 10 by dispersing the water shock generated during the inflow of the backwashing fluid to the bottom 120 of the body 100, and the inner side of the body 100 It connects the upper wall 110 and the floor 120 while extending in a vertical posture from the central part, and is formed to extend long in the longitudinal direction of the body 100 together with this.

On the other hand, the reinforcing part 200 may be formed in a box-shaped structure, with an open bottom surface.

The partition wall 300 divides the space on the left and right inside the main body 100 divided by the reinforcing part 200 into a water supply chamber (C1) and a dispersion chamber (C2), and is formed inside the left space and the right space, respectively. However, it is formed to extend from the upper end of the reinforcing part 200 to the bottom 120 of the main body 100 while traversing the left space or the right space in a diagonal direction.

Meanwhile, primary orifices 171a, 171b, 171c, and 171d having a four-stage structure are formed in each partition wall 300 to be dispersed along the longitudinal direction of the main body 100 due to a height difference.

More specifically, a plurality of the primary orifices 171a, 171b, 171c, and 171d are formed to be dispersed in the height direction and the length direction of the partition wall 300, and the primary orifices located at the same height would be referred to as one stage. At this time, a plurality of primary orifices 171a, 171b, 171c, and 171d are dispersedly formed in the partition wall 300 to form four stages.

On the other hand, Figure 6 shows a structure in which four primary orifices (171a, 171b, 171c, 171d) are formed to be located on the same cross-section, but for convenience of explanation, the four primary orifices (171a, 171b, 171c, 171d) is shown on the same cross-section, and the four primary orifices 171a, 171b, 171c, and 171d are not necessarily formed to be positioned on the same cross-section.

Meanwhile, of the four primary orifices 171a, 171b, 171c, and 171d located at different heights, the upper first, second, and third-stage primary orifices 171a, 171b, and 171c are used to eject air during backwashing. , the lowermost 4-stage primary orifice 171d is used to eject water.

A plurality of secondary orifices 172 are formed on the upper wall 110 of the body 100, and the secondary orifices 172 are dispersed in the width and length directions of the body 100, the primary orifices ( 171a, 171b, 171c, 171d) is formed at a position shifted from the primary orifice (171a, 171b, 171c, 171d) so as not to be positioned vertically above.

According to this structure, it is possible to prevent the ejection pressure of the rising air ejected from the primary orifices 171a, 171b, 171c, and 171d from being directly transmitted to the secondary orifice 172, and through this, the dispersion chamber C2. It is possible to maintain a constant thickness of the air layer formed on the top of the.

On the other hand, the secondary orifice 172 has a hole 1721 vertically penetrating the upper wall 110, and is formed at the upper end of the hole 1721, is recessed from the upper surface of the upper wall 110, and is smaller than the hole 1721. It has a dimple-type structure in which dimple grooves 1722 having a large area are formed.

The mounting end 400 supports the bottom edge of the filter media support plate 40 from the bottom, has a rectangular ring structure, and is formed to protrude from the upper surface of the main body 100 .

That is, the mounting end 400 is formed in the form of a band extending along the edge of the upper surface of the main body 100 , and is formed to protrude upward from the upper surface of the main body 100 to support the edge of the bottom surface of the filter media support plate 40 . is done

Meanwhile, in the inner region of the mounting end 400 , a lattice-shaped support structure 410 for additionally supporting the bottom surface of the filter media support plate 40 is formed to protrude from the upper surface.

The protective jaw 500 prevents the filter media support plate 40 from being separated while facing the side surface of the filter media support plate 40 seated on the cradle 400, and extends along the outer periphery of the cradle 400. and is formed to protrude upward from the circumference of the mounting end 400 .

The protective jaw 500 is formed sufficiently high in consideration of the thickness of the filter media support plate 40, and preferably the upper surface of the protective jaw 500 matches the upper surface of the filter media support plate 40 seated on the mounting end 400. formed to do

On the other hand, in the protective jaw 500 of the main body 100 according to a preferred embodiment of the present invention, the sealing material 600 is disposed between the filter media support plate 40 and the protective jaw 500 while aligning the filter media support plate 40 in the correct position. A guide baffle 510 that forms a space to be uniformly filled is further formed, and a sealing material 600 having a sufficient thickness between the filter media support plate 40 and the mounting end 400 may be installed on the supporting end 400 . A sealing groove 420 is further formed.

The guide baffles 510 protrude from the inner side of the protective jaw 500, and a plurality of them are formed to be dispersed along the inner side of the protective jaw 500, and are in contact with the four sides of the filter media support plate 40 at various positions while contacting the filter media. configured to align the support plate 40 in place.

The sealing groove 420 is located on the upper surface of the mounting end 400 at the connection portion of the protective jaw 500 and the mounting end 400 , and extends along the circumference of the mounting end 400 , and a guide baffle 510 . and another sealing space connected to the sealing space formed between the filter media support plate 40 and the protective jaw 500 is configured to form between the mounting end 400 and the filter media support plate 40 .

The sealing groove 420 may be configured by forming a single groove extending along the circumference of the mounting end 400 on the upper surface of the mounting end 400 , and may include a first groove 421 having a relatively low depth and The second groove 422 having a relatively deep depth may be configured to form a two-step stepped structure.

On the other hand, when the sealing groove 420 is formed of two grooves, that is, the first groove 421 and the second groove 422 , the first groove 421 and the second groove 422 are the mounting end 400 . Doedoe having a structure extending along the circumference of the first groove 421 and the second groove 422 are connected to each other, where the first groove 421 is closer to the protective jaw 500 than the second groove 422 formed to be located.

In the guide baffle 51 and the sealing groove 420 configured as described above, the protrusion height (H) of the guide baffle 510 is a distance ( It is preferable that the sealing materials 600 formed between the guide baffle 51 and the guide baffle 51 be connected to each other by being smaller than L).

According to this structure, the space formed between the filter media support plate 40 and the protective jaw 500 by the guide baffle 510 and between the filter media support plate 40 and the mounting end 400 by the sealing groove 420 . The space formed in the space is connected to each other, and accordingly, the sealing material 600 to be constructed between the filter media support plate 40 and the protective jaw 500 and between the filter media support plate 40 and the mounting end 400 is connected to one another and integrated with each other. can do it

In the perforated block 10 as described above, it is formed between the reinforcing part 200 and the upper wall 110 to form a space in the lower part of the upper wall 110 to allow the uniform formation of an air layer of sufficient thickness. A partition wall 180 is further formed.

The partition wall 180 extends vertically upward from the upper end of the reinforcing part 200 and is formed in the form of a plate in a vertical posture connected to the upper wall 110 , and extends in the longitudinal direction of the body 100 .

In addition, the partition wall 180 is made of two, and the two partition walls 180 are formed to face each other and have a spaced apart structure.

As described above, according to the partition wall 180 formed in the form of a vertical plate material between the reinforcing part 200 and the upper wall 110, the upper wall 110, the reinforcing part 200, and the partition wall 300 are connected. By expanding the existing narrow space to be formed so that an air layer of sufficient thickness can be formed in the corresponding part as in other parts, the ejection pressure of the air ejected through the secondary orifice 172 can be uniformed as a whole.

11 is a diagram showing the internal configuration of a filter media support plate according to a preferred embodiment of the present invention, and FIG. 12 shows an internal structural diagram of a mold used for manufacturing the filter media support plate according to the present invention.

The filter media support plate 40 according to the present invention consists of a plurality of synthetic resin grains bonded to each other by thermal fusion, and a plurality of exposed grooves 41 are formed on the bottom surface 40a in the form of a rectangular plate.

On the other hand, due to the characteristics of manufacturing the filter media support plate 40 by using the mold 42 made of a metal material, more grains are pressed on the surface of the filter media support plate 40, and the sealing phenomenon occurs, so that the surface voids of the filter media support plate 40 This closure or decrease occurs.

That is, in the case of particles that directly contact the surface of the mold 42 in the process of forming the filter media support plate 40 by filling the inside of the mold 42 made of a metal material with particles of synthetic resin and applying heat and pressure, it is located inside the mold 42 Thus, since it receives more heat than the grains spaced apart from the surface of the mold 42 , a phenomenon in which the pores are closed or reduced occurs on the surface of the filter media support plate 40 .

Meanwhile, the filter media support plate 40 according to the present invention has a plurality of exposed grooves 41 formed on its bottom surface, and each exposed groove 41 is formed to expose the internal voids of the filter media support plate 40 in the bottom direction. Even when the pores formed on the bottom surface of the filter media support plate 40 are partially closed or reduced, smooth flow and uniform dispersion of the filtration and backwash fluid can be induced.

In this way, the filter media support plate 40 having a plurality of exposed grooves 41 formed on the bottom surface is filled with synthetic resin particles in a mold 42 formed to protrude while a plurality of molding protrusions 43 are dispersed on the bottom surface, and heat and pressure are applied. It is preferred to be prepared in this way.

In this case, when the exposed groove 41 is formed by machining a hole in the bottom surface of the filter media support plate 40 after the forming of the filter media support plate 40 is completed, the internal voids of the filter media support plate 40 are formed with the exposed grooves 41 and On the other hand, the exposure effect of the internal voids is lowered due to the failure to connect naturally, while the exposed grooves 41 are formed in the forming process of the filter media support plate 40 as described above, so that the exposed grooves 41 and the voids are naturally connected to the exposed grooves 41 It is possible to maximize the effect of exposure of durable voids through

13 is a structural diagram of a filtration structure to which the lower water collecting device according to the present invention is applied.

The filter media layer 50 is formed inside the filtration structure to which the lower water collecting device configured as described above is installed, and the trough 60 is installed.

The filter media layer 50 is formed on the upper part of the lower water collecting device installed on the bottom of the filtration structure, and the trough 60 is filtered so as to be located on the upper part of the filter media layer 50 and spaced apart from the filter media layer 50 . installed at the top of the structure.

In addition, the filter structure is connected to the raw water pipe 71 to receive the raw water discharged from the settling basin, and is connected to the discharge pipe 72 to discharge the internal water, and is reversed through the backwash air pipe 73. It is connected to the washing blower 80 and connected to the backwash pump 90 through the backwash pipe 74 to receive the fluid used for backwashing.

In addition, an inlet valve 75 is installed in the raw water pipe 71, a drain valve 76 is installed in the outlet pipe 72, and a backwash air valve 77 is installed in the backwash air pipe 73, , a backwash inlet valve 78 is installed in the backwash water pipe 74 to control the flow of fluid in each pipe.

In addition, the filter structure may be formed of a concrete structure or a steel structure.

The dimple type lower water collecting device having a stable watertight structure and a uniform dispersion structure of the perforated block according to the present invention configured as described above is a straight water collecting structure by installing a plurality of perforated blocks 10 to be connected in series to the bottom of the filtration structure. (20) is formed, but a plurality of perforated blocks 10 are installed at the bottom of the filtering structure to form a structure in which a plurality of water collecting structures 20 are arranged in parallel, and some perforated blocks 10 are anchor bolts It is fixed to the bottom of the filtering structure by the used fixture.

14 is an exemplary view showing a state in which the perforated block according to the present invention is connected to the air pipe at the bottom of the filtration structure.

As described above, the plurality of water collecting structures 20 formed at the bottom of the filtering structure are connected to the air pipe 31 branched from the air header pipe 30 to receive air, and the air pipe 31 is a perforated block. It may be connected to the water collecting structure 20 in the form of flowing into the lower portion or the side of the (10).

Meanwhile, the filter media support plate 40 is assembled at the upper end of the perforated block 10 installed on the bottom of the filtration structure to form the water collecting structure 20 .

In the process of assembling the filter media support plate 40 on the upper part of the perforated block 10 , the four sides of the filter media support plate 40 are positioned while in contact with the guide baffle 510 formed on the protective jaw 500 of the perforated block 10 . is aligned, and the side of the filter media support plate 40 maintains a certain distance from the inner side of the protective jaw 500, so a space for installing the sealing material with a uniform thickness around the filter media support plate 40 is provided. can be obtained easily.

In the process of assembling the filter media support plate 40 as described above, a sealing material 600 is constructed between the filter media support plate 40 and the protective jaw 500, and between the filter media support plate 40 and the mounting end 400, and the filter media support plate 40 ) and the sealing material 600 to be constructed between the protective jaw 500 is filled in the space between the guide baffle 510 and the guide baffle 510, and is constructed between the filter material support plate 40 and the mounting end 400. The sealing material 600 is filled in the sealing groove 420 .

On the other hand, the sealing material 600 constructed between the filter material support plate 40 and the protective jaw 500 and the sealing material 600 constructed between the filter material support plate 40 and the mounting end 400 are connected to each other to form an integrated structure. Therefore, it is possible to more stably bind the filter media support plate 40 to the perforated block 10, as well as effectively suppress the occurrence of gaps to realize a stable watertight structure and a uniform dispersion structure.

As described above, mortar is poured between the water collecting structure 20 and the water collecting structure 20 configured at the bottom of the filtration structure, and in the process of pouring the mortar between the water collecting structure 20 and the water collecting structure 20, the perforated block The residual air in the lower part of (10) flows into the inner space of the reinforcing part 200 while being pushed by the mortar, so that the mortar is not uniformly filled in the lower part of the perforated block 10 due to the residual air in the lower part of the perforated block 10. can prevent it from happening.

In addition, since a part of the mortar filled in the lower part of the perforated block 10 is hardened while being introduced into the inner space of the reinforcing part 200, the binding force between the mortar and the perforated block 10 is improved, so that the perforated block 10 is more firmly fixed. This becomes possible.

Meanwhile, the lower water collecting device according to the present invention configured at the bottom of the filtration structure collects and discharges filtered water filtered through the filter media layer in the raw water filtration process, and uniformly disperses backwash air and backwash water in the backwashing process to the lower part of the filter media layer. It is the same as the conventional perforated block-type lower water collecting device in that it performs the function of making the water.

However, the lower water collecting device according to the present invention effectively prevents a gap between the filter media support plate 40 and the perforated block 10 from being formed or widened, thereby preventing the loss of the filter media or air leakage during filtration or backwashing. , thereby inducing a uniform dispersion of the backwashing fluid, thereby improving the backwashing efficiency.

The present invention is not limited to the specific preferred embodiments described above, and without departing from the gist of the present invention as claimed in the claims, anyone with ordinary skill in the art to which the invention pertains can implement various modifications Of course, such modifications are intended to be within the scope of the claims.

<Explanation of symbols for main parts of the drawing>
10: perforated block 20: water collecting structure
30: air header pipe 31: air pipe
40: filter media support plate 41: exposed groove
50: mold 51: molding protrusion
100: body 110: upper wall
120: floor 130: left wall
140: right wall 150: ribs
160: guide ribs 171a, 171b, 171c, 171d: 1st orifice
172: secondary orifice 180: bulkhead
200: reinforcement part 300: bulkhead
400: mounting end 410: support structure
420: sealing groove 421: first groove
422: second groove 500: protective jaw
510: guide baffle

Claims (8)

A plurality of perforated blocks 10 having a water supply chamber (C1) and a dispersion chamber (C2) formed therein and installed at the bottom of the filtration structure to receive fluid (air + water), and each of the perforated blocks 10 In the lower water collecting device comprising the filter media support plate 40 assembled on the upper part,
A mounting end 400 is formed on the upper surface of the perforated block 10 to support the bottom edge of the filter media support plate 40 from the bottom, and the side of the filter media support plate 40 and the outer periphery of the supporting end 400 are formed. A protective jaw 500 that prevents the separation of the filter media support plate 40 while facing is formed,
A plurality of guide baffles ( 510) is formed to partially protrude,
It is located on the upper surface of the mounting end 400 at the connection portion of the protection jaw 500 and the mounting end 400, and extends along the circumference of the mounting end 400, and includes a guide baffle 510 and a filter media support plate 40. And a sealing groove 420 forming another sealing space connected to the sealing space formed between the protective jaws 500 is further formed on the upper surface of the mounting end 400,
The sealing groove 420 is composed of a first groove 421 having a relatively low depth and a second groove 422 having a relatively deep depth, and is formed to have a two-stage stepped structure. A dimple-type lower water collecting device with a watertight structure and a uniform dispersion structure.
delete delete The method according to claim 1,
A dimple-type lower water collecting device having a stable watertight structure and a uniform dispersion structure of the perforated block, characterized in that the first groove (421) is formed to be located closer to the protective jaw (500) than the second groove (422).
5. The method according to claim 4,
The protrusion height (H) of the guide baffle (510) is smaller than the distance (L) at which the second groove (422) is spaced apart from the protective jaw (500). A dimple-type lower water collecting device with
The method according to claim 1,
A plurality of exposed grooves 41 that allow the internal voids of the filter media support plate 40 to be exposed through the bottom surface of the filter media support plate 40 are dispersedly formed on the bottom surface of the filter media support plate 40, and the exposed grooves 41 are In the process of filling the inside of the mold 42 with synthetic resin grains and applying heat and pressure to form the filter media support plate 40, a plurality of forming protrusions 43 formed to protrude in a columnar shape from the bottom surface of the mold 42 are used to form the filter media support plate. A dimple-type lower water collecting device having a stable watertight structure and a uniform dispersion structure of a perforated block, characterized in that it is formed together with the molding of (40).
The method according to claim 1,
In the partition wall 300 formed inside the perforated block 10 so as to divide the internal space of the perforated block 10 into a water supply chamber (C1) and a distribution chamber (C2), a plurality of primary units having a four-stage structure by a height difference Orifices (171a, 171b, 171c, 171d) are formed, a plurality of secondary orifices 172 are formed to be dispersed on the upper wall 110 of the perforated block 10, and the upper first stage, the second stage, and the third stage 1 The secondary orifices (171a, 171b, 171c) eject air, and the lower four-stage primary orifice (171d) is made to eject water, and the secondary orifice 172 is the primary orifices (171a, 171b, 171c). , 171d) is formed in a position shifted from the primary orifices (171a, 171b, 171c, 171d) so as not to be located vertically above the secondary orifice 172. A dimple-type lower water collecting device with a stable watertight structure and a uniform dispersion structure.
The method according to claim 1,
A filter media layer is formed on the upper part of the lower water collection device installed on the bottom of the filter structure, and a trough is installed on the upper part of the filter media layer, and the filter structure includes a raw water pipe (71), a discharge pipe (72), and a backwash pipe ( 73) and a backwash pipe 74, the backwash air pipe 73 is connected to the backwash blower 80, the backwash pipe 74 is connected to the backwash pump 90, and Stable watertight structure and uniform dispersion of the perforated block, characterized in that a valve for controlling the flow of fluid is installed in the raw water pipe 71, the discharge pipe 72, the backwash air pipe 73, and the backwash pipe 74, respectively A dimple-type lower water collection device with a structure.

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