KR20080079723A - A perporated block support structure for underdrain - Google Patents

Abstract

A perforated block supporting structure for an underdrain is provided to maintain the perforated blocks in a stable and solid state without causing buoyancy to float the perforated blocks upward during backwashing of a plurality of perforated blocks, and a sealing structure for preventing washing water and air from leaking in joints between wall bodies or bottom faces and the perforated blocks is provided. A perforated block supporting structure for an underdrain comprises supporting plates(30) positioned on circumferences of front and rear faces of one or more perforated blocks(20) and fixed to series connecting faces between the perforated blocks and bent to support the perforated blocks, wherein respective horizontal bent faces of the supporting plates are supported by clamping members. The clamping members are combinations of anchor bolts(40) and nuts(41). The perforated block supporting structure further comprises: supports(50) installed on front and rear faces of bottoms of the perforated blocks such that lower parts of the anchor bolts are fixedly joined with the supports; a plurality of catching protrusions(22a) which are formed on outer walls of the perforated blocks in a predetermined distance, and into which bent support plates(60) are inserted such that both ends of the bent support plates are joined with the anchor bolts; and sealing members(11b,13a) for maintaining air tightness and water tightness between wall bodies(11) or bottom faces and the perforated blocks. Further, the sealing members are one of O-rings or flanges.

Description

Perforated Block Support Structure for Underdrain

1 is a perspective view showing a state in which a support structure installed in each of the hole blocks of the lower collecting device in the filter paper according to the present invention,

2 is an enlarged perspective view of a support structure installed on a part of a hole block according to the present invention;

3 is a view showing a state of the support structure installed on the front of the hole block according to the present invention,

4 is a cross-sectional view taken along the line A-A of the plurality of hole blocks according to FIG.

* Explanation of Signs of Major Parts of Drawings *

C1: first chamber C2: second chamber

10: filter paper 11: wall

11a: opening 11b, 13a: sealing member

12: main air distribution pipe

13: branch air distribution pipe 20: pore block

20a: lid

21 floor 22 outer wall

22a: protrusion 23: upper wall

23a, 24a: through hole 24: inner wall

30: support plate 31: horizontal bending surface

40: anchor bolt 41: nut

50: pedestal 60: support plate

The present invention relates to a porous block support structure and a sealing structure for the lower collecting device, and more particularly, is installed in the lower portion of the filter paper of the water purification plant and installed in plurality in the lower collecting device which is responsible for the equal distribution of the collected water and backwash water of the filtered water. In the backwashing process, the support structure and the sealing structure to maintain a stable fixed state without floating in the upward direction.

In general, the constant manufacturing process is to inject the chemical into the raw water, go through the mixing, flocculation and sedimentation separation step, and then supply to the rapid filter through the outflow ware effluent of the chemical settler, sediment water supplied to the rapid filter It is passed through the filter bed at a relatively high speed to filter the suspended matter in the raw water.

The rapid filter is a raw water inlet portion, which feeds raw water from the sedimentation basin, a filter paper for filtering the raw water flowing from the raw water inlet portion, a purified water collecting portion installed at a lower portion of the filter paper and collecting purified water filtered from the filter paper, and a filter paper. And a backwashing device for surface washing the filter medium, a backwashing device for backwashing the filter medium of the filter paper, and a lower collecting device for collecting the purified water while supporting the filter medium.

The lower collecting device maintains a sufficient cross-section in the water transport process to reduce head loss and to planarize the water pressure.In the water distribution process, the flat water inflow and outflow is reduced by reducing the water flow pore and increasing the water resistance to some extent. It is designed to promote. The head of loss of the lower collector is determined by the area of the opening, the flow rate and the shape factor.

If the washing is not uniformly flat, the water passes only to the washing portion during filtration, and a portion of the filtration speed is high, and partial closing of the filtration layer occurs gradually in the insufficient washing portion. Therefore, ensuring uniformity of washing is very important to maintain the function of the filter paper. Since the low collecting head is economical because the lower collecting device is economical, research should be made to make the loss head as small as possible and to obtain uniformity of the water flow distribution.

On the other hand, the lower collecting device capable of ensuring an even distribution with a small head loss is excellent as a device, but the water resistance is small, so that water level fluctuations on the outflow side, such as filtration collection, are transferred into the filter paper, which tends to disturb filtration conditions. Therefore, in the case of adopting a lower collecting device with less loss head, it is necessary to have a structure in which the outflow water level fluctuation such as filter collection is small so that the filter paper and the downstream side are not hydraulically continuous.

As a conventional sewage collecting device for water purification, a wheeler type is first developed, and a strainer type is introduced to form a hole block type, a tea pee block type, a hole plate type, and a porous hole. Plate shapes are introduced.

Among them, a form of a hole block is disclosed in Patent No. 244169. Since it has a fixed shape, it is difficult to control the number of installation of a hole block per unit area, and because it has an internal dispersion hole for rising water flow. The head of loss caused by water flow is large. In addition, compared with the previous strainer-type lower collecting device, the spacing of the orifices is narrower, which is relatively advantageous for the reduction of the catcher, but the value is fixed to generate some catching areas.

Applicant disclosed in Korean Patent Registration No. 10-461902, which has been filed in order to improve the problems of the conventional lower hole collecting device for the lower collecting device, the upper wall of the hole block is formed of an uneven surface of the egg plate form Holes are formed in the concave and convex portions of the cotton so that the backwash water is discharged to have an even distribution through the concavity formed in the concave portion of the upper surface during backwashing. Since the wash water is recovered by distribution, it is possible to prevent the local concentration of the load during backwashing and filtration in the filter paper to prevent partial closure of the filter layer so that the function of the filter paper can be maintained normally. In other words, it is designed to distribute water and air evenly at the same time by collecting water and air individually or in parallel with even collection of the filtered water. Backwashing water mixed with air that continues to cause friction and continues to rise removes solids from the filter bed. In addition, the porous block-type bottom collecting device of the double partition structure allows the equal distribution of water and air through the hole drilled in the upper surface in the longitudinal direction. The water and air supplied to the primary bulkhead structure decrease in velocity head and increase pressure head along the longitudinal direction, and water and air escape through the holes formed in the primary bulkhead structure. In addition, as the pressure head decreases inversely from the secondary channel, the pressure distributions of the primary channel and the secondary channel merge and become uniform, and the pressure of the water and air flowing out from the upper surface of the lower collecting device becomes uniform. Is done.

However, since the perforated block supplies the backwash water from the lower part to the upper part, there is a problem in that the perforated block itself tends to float and cannot maintain a stable state.

In more detail, in constructing the above-mentioned hole blocks, mortar is applied to the bottom of the filter paper for the purpose of leveling and leveling the bottom of the filter paper, and the hole blocks are lined thereon one by one. When cured, the mortar is poured into the gap between the blocks to fix the holes. However, the coupling force of the porous block and mortar of the HDPE material has a problem that can not stably withstand the vertical load due to the upstream of water and air during backwashing.

That is, in the case of backwashing, high pressure compressed air is introduced into the hole block, and the filter sand located at the upper portion of the hole block is subjected to the impact of compressed air from the bottom to shake off the turbidity such as sludge. Since the compressed air is applied at an initial moment, the pressure is very large, which causes a problem that the filtrate is lost or breaks away from the mortar supporting and fixing the hole block.

In addition, in the conventional filter paper bottom collecting device, the connection part does not form a completely sealed structure at the part where the wall or the bottom surface that supplies water and air for contact with the plastic hole for backwashing has a risk of leakage. Therefore, in the related art, in order to form a sealing structure, it was applied with epoxy or the like and finished with mortar, but there was still a problem because it was not completely sealed by this method.

Therefore, the present invention was invented to solve the above conventional problems, and an object of the present invention is to stabilize the pore block is not raised to the top by buoyancy during the backwash operation of a plurality of perforated blocks installed in the lower collecting device It is to provide a support of the hole block for the bottom collecting device to maintain a solid state.

In addition, another object of the present invention is to provide a sealing structure in which water and air for backwashing do not leak at the connection site between the wall or the bottom surface and the hole block.

The present invention for achieving the above object is a plurality of installed on the filter paper of the water purification plant is supplied with the air and water for backwashing from the wall or the bottom surface is responsible for the equalization of the collection of the filtered water and backwash water, An outer side wall formed on both sides of the bottom, an upper wall formed between an upper end of the outer wall, an inner wall formed to be inclined from the opposite ends of the bottom to the center lower portion of the upper wall, and water in the inner wall and the upper wall; An air hole for the lower collecting device is formed through the air through the hole, the bent support plate is provided around the front and rear of the at least one hole block, the horizontal bending surface of the support plate is provided between the outer wall of each hole block It is characterized in that the coupling member to be supported by the technical features.

The fastening member is a structure consisting of a combination of anchor bolts and nuts.

A bottom is provided on the front and rear surfaces of the hole block so that the lower portion of the anchor bolt is coupled and fixed.

In addition, a plurality of locking projections are formed on the outer wall of the hole block at intervals, and the locking projections are fitted with bent support plates, and both ends thereof are coupled to the anchor bolts.

A sealing member is provided at the wall or bottom surface and the hole block in contact with each other to maintain airtightness and watertightness. The sealing member is provided with an insert, such as a circular or polygonal flange or O-ring, between the plastic pipe and the concrete surface. Structure. Using such a watertight structure ensures watertightness and airtightness even without filling with epoxy or mortar, and there is no risk of leakage.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For reference, the method of installing the lower collecting device for the filter paper includes a wall sleeve method in which a water distribution pipe and an air supply pipe are formed on a wall, and a hole connected to the water distribution pipe and the air supply pipe is formed at one end of the lower collection device. There is a plume method in which the water distribution pipe and the air supply pipe are connected from the bottom of the filter paper. In the drawings and description of the embodiment of the present invention mainly described the wall sleeve method, but the scope of the present invention is not limited to the wall sleeve method, it is clear that the support structure and the sealing structure is equally applied to the plum method.

1 is a perspective view showing a state in which a support structure installed in each of the hole blocks of the lower collecting device in the filter paper according to the present invention, Figure 2 is an enlarged perspective view of the support structure installed in a portion of the hole block according to the present invention, Figure 3 is the present invention FIG. 4 is a cross-sectional view taken along line AA of the plurality of hole blocks according to FIG. 3.

As shown in FIG. 1, the present invention is a lower collecting device installed in a plurality of filter papers 10 of a water purification plant to be responsible for collecting the filtered water and equally distributing the backwashing water, and forming a lower collecting device. The wall 11 of this filter paper 10 is provided in multiple numbers at intervals.

The main air distribution pipe 12 is connected between the walls 11, and the lower part of the main air distribution pipe 12 is provided to communicate with the main air distribution pipe 12 while air is introduced into the air hole 20. Branch air distribution pipe 13 is provided to supply the.

In addition, the wall 11 corresponding to the lower position of the branch air distribution pipe 13 is formed with an opening 11a through which water is supplied. In the plume method, the air distribution pipe and the water supply pipe are vertically connected to the hole block from the concrete bottom surface of the hole block.

When the water and air passing through the opening 11a and the branch air distribution pipe 13 of the wall 11 pass through the concrete wall 11 or the bottom surface, the plastic block or the porous block lid 20a Since it is difficult to form a complete watertight or airtight structure between the concrete and the wall or floor of the concrete material, a sealing member is provided to maintain the watertight or airtightness.

That is, as shown in Figure 3, the side of the hole block 20 side of the wall 11 is provided with a lid portion 20a for the hole block 20, the branch air in contact with the lid portion (20a) Since water or air can leak between the distribution pipe 13 and the opening part 11a through which water passes, a sealing member is provided in this part.

O-ring (11b) (13a) may be provided as the sealing member, but the sealing member is not limited to the O-ring, it can form a variety of watertight structure, for example, a circular or polygonal flange, etc. For example.

As shown in FIGS. 2 and 4, the hole block 20 has a closed bottom 21, an outer wall 22 formed on both sides of the bottom 21, and an upper end between the outer wall 22. The upper wall 23 to be formed, the inner wall 24 formed to be inclined from the ends of the bottom 21 to the center lower portion of the upper wall 23, the water and the upper wall 23 and the inner wall 24 Through holes 23a and 24a for entering and exiting air are formed.

First and second chambers C1 and C2 are formed by the upper wall 23 and the inner wall 24.

Here, the present invention is provided with a support plate 30 that is bent around the front and rear of the plurality of hole blocks 20, the horizontal bent surface 31 of the support plate 30, the anchor bolt 40 ) And a fastening member such as a nut 41 are coupled. The anchor bolt 40 and the nut 41 are coupled to each other and supported between the outer walls 22 of the respective hole blocks 20.

In other words, the support plate 30 is a single support plate 30 along the front and rear circumference of the hole block 20 is provided so that the plurality of hole blocks 20 are connected to each other, the fastening member The anchor bolt 40 and the nut 41 are coupled to and fixed to the horizontal bent surface 31 of the support plate 30 while being positioned between the hole blocks 20.

In addition, in addition to the front and rear circumference of the perforated block, the support plate can be fixed to the series connection surface between the perforated blocks.

In addition to the fastening members such as the anchor bolt 40 and the nut 41, other fastening members that may be coupled to and supported by the support plate 30 may be applied.

The support plate 30 is not particularly limited in material, but is preferably formed of a metal material such as stainless steel, which is not rust, and is not rusted. The hole block 20 in this embodiment has a rectangular shape. Since it is achieved, bent along each outer surface of the hole block 20 so as to conform thereto.

Before and after the bottom 21 of the hole block 20, a pedestal 50 is provided so that the lower portion of the anchor bolt 40 is coupled and fixed.

In addition, a plurality of locking projections 22a are formed on the outer wall 22 of the hole block 20 at intervals, and the supported support plate 60 is fitted to the locking projections 22a, and the supporting plate ( Both ends of the horizontal bending surface 61 of 60 are coupled to the anchor bolt 40 together with the nut 41 to be fixed.

The present invention having such a configuration is provided at the bottom of the main air distribution pipe 12 and then communicated with each other when passing through the main air distribution pipe 12 at the time of backwashing each of the hole blocks 20. Air and water (backwash water) are supplied through the branch air distribution pipe 13 and the opening 11a of the wall 11, respectively, into the first chamber C1 of the hole block 20. Then, it is discharged through the through hole 24a formed in the inner wall 24 and flows into the second chamber C2, and then is ejected through the through hole 23a formed in the upper wall 23. At this time, the air supplied by the air distribution pipe 12 will rise together with the backwash water.

In this process, since the inside of the hole block 20 has a predetermined pressure, the hole block 20 tries to rise due to buoyancy, and at this time, the shape bent along the upper and rear surfaces of the hole block 20. The support plate 30 is provided with each, and the anchor bolt 40 is coupled with the nut 41 for each horizontal bending surface 31 of the support plate 30, so that the hole block 20 To stop it.

Furthermore, a plurality of locking projections 22a protrude and form at intervals on the outer wall 22 of the hole block 20, and a support plate 60 having a structure bent over the locking projections 22a is fitted. Since the anchor bolt 40 at both ends is coupled and fixed together with the nut 41, the hole 20 is reliably prevented from rising.

As described above, the present invention stably supports by the support plate and the anchor bolt that the hole block itself is to be raised by buoyancy during backwashing of the hole block, so that the hole block has an effect of maintaining the installed state firmly.

In addition, the branch air distribution pipe and the opening of the wall to which the water is supplied are provided with sealing members for maintaining airtightness and watertightness, respectively, so that the sealing effect can be exerted.

The present invention has been described for the embodiments of the present invention based on the accompanying drawings for convenience, but is not limited thereto, and various modifications and changes are possible within the scope of the technical idea of the present invention.

Claims (6)

A plurality of filter papers of a water purification plant supplied with backwashing air and water from a wall or a bottom surface to cover the collection of the filtered water and the equal distribution of the backwashing water, and to the closed floor and the outer wall formed on both sides of the floor, An upper wall formed between the upper end of the outer wall, an inner wall formed to be inclined to the center lower portion of the upper wall at both ends of the bottom surface, and a lower collecting device having a through hole for access of water and air in the inner wall and the upper wall; As a pore block, A support plate bent to support the at least one hole block and positioned around the at least one of the at least one hole block front and the series connecting surface between the hole block and the rear surface, each horizontal bent surface of the support plate is fastened to the fastening member Perforated block support structure for a lower collecting device, characterized in that supported by. The method according to claim 1, The fastening member is a hole block support structure for a lower collecting device, characterized in that consisting of a combination of anchor bolt and nut. The method according to claim 1 or 2, Before and after the bottom of the hole block bottom is provided with a pedestal so that the lower portion of the anchor bolt is coupled, fixed to the lower block collecting device supporting structure for the structure. The method according to claim 1 or 2, A plurality of locking protrusions are formed on the outer wall of the hole block at intervals, and the locking protrusions are fitted with bent support plates, and both ends thereof are coupled to the anchor bolts. The method according to claim 1 or 2, And a sealing member for maintaining airtightness and watertightness between the wall or the bottom surface and the hole block. The method according to claim 5, And the sealing member is one of an o-ring or a flange.

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