KR100337625B1 - A block used for underdrain and contruction method of thereof - Google Patents

Abstract

The present invention relates to a lower collecting device air hole and its construction method for equal distribution of air and water during backwashing in a rapid filter paper, and to share the backwash recovery passage between the unit hole blocks and easily adjust the horizontal posture easily and accurately. In order to provide a flexible hole block and a construction method thereof, upwardly bent projections which may be fixed to the outer bolts 12 and 14 by anchor bolts 42, first nuts 44, and second nuts 46 are provided. Perforated blocks (32) and (34) formed, and recessed wall portions (36) and (38) that provide backwash recovery passages at the sites where the upper wall (16) and the outer wall (12) and (14) meet. Perforated block for lower collecting device, which is constructed with unit perforated block, and its construction method.

Description

Perforated block for lower collecting device and construction method thereof {A block used for underdrain and contruction method of

The present invention relates to a lower collecting device perforated block that allows equal distribution of air and water during backwashing in a rapid filtration paper. In particular, the backwash may be backwashed by injuring sediment during backwashing at the connection area of a perforated block adjacent to one perforated block. It relates to a porous block which can be easy to install and its construction method.

One type of conventional hole block has been presented in International Patent Application Publication No. 97-702094.

The perforated block had a backwash water recovery passage in the center of the block to improve the backwash function of water and air.

Since the backwash recovery path had to be formed for each of the perforated blocks, the structure of the perforated blocks was complicated, which required a lot of manufacturing costs. It was not possible to increase the number of installations of perforated blocks per unit area, which was not desirable in terms of space utilization, and the perforated blocks were horizontal before sealing them with grout between the sides of the filter paper and between the perforated blocks and between the perforated blocks. There was a problem that it is very difficult to accurately fix in the state.

The present inventors have studied and researched to solve the above-mentioned problems of the prior art. As a result, the backwash recovery passage is formed between the perforated blocks so that the adjacent backwash recovery passage can be used by the adjacent perforated blocks. In installing them, it was found that all the problems of the prior art could be solved if they could accurately adjust their horizontal posture before placing concrete mortar between the porous blocks.

Therefore, the present invention has a technical problem to provide a perforated block and its construction method that can share the backwash recovery passage and easily adjust the horizontal posture.

1 is a plan view of a pore block according to the present invention

Figure 2 is an enlarged cross-sectional view taken along line I-I of Figure 1

Figure 3 is a longitudinal cross-sectional view showing a method for constructing a hole block according to the present invention

4 is a partially enlarged cross-sectional view of FIG.

* Description of Signs of Main Parts of Drawings *

10: bottom wall 12, 14: outer wall

16: upper wall 18: dispersion hole

20, 22: bulkhead 24, 26, 28: compartment

30: orifice 32, 34: upward bent projection

36, 38: concave wall portion 40: orifice

42: anchor bolt 44: first nut

46: second nut 48: dispersion hole

50: cover

1 and 2, the present invention has a bottom wall 10, an outer wall 12, 14, and an upper wall 16, and dispersion holes 18 are formed in the upper wall 16. A plurality of compartments 24, 26, and 28 are formed by a pair of partitions 20, 22 extending from the inner edge of the bottom wall 10 toward the upper wall 16. 20. The hole collecting block for the lower collecting device in which the orifice 30 is formed on the 22 and 22, the outer walls 12 and 14 are formed with upwardly bent projections 32 and 34, and the upper wall 16 ) And the outer wall 12, 14 is formed in the recessed wall portion 36, 38 having a stepped shape inwardly, and the recessed wall portion 36, 38 in the horizontal and vertical direction The unit hole block (A) in which the orifice 40 is formed.

The construction state of the unit hole blocks (A) according to the present invention is illustrated in FIG.

Unit hole blocks (A) and (A ') are arranged side by side in a state where the first nut 44 is fastened to the anchor bolt 42 fixed to the bottom of the cracked place. The protrusions 32 and 34 on the outer walls 12 and 14 of the unit hole blocks A and A 'are placed, and then the second nut 46 is attached to the protrusions 32 and ( 34) The unit holes block (A) and (A ') are fixed to the anchor bolts 42 by fastening to the anchor bolts 42 from above, and the unit hole blocks A' adjacent to the unit hole blocks A '. Placing concrete mortar (B) between the, but by the body leaving the concave wall portion 36, 38 of the unit hole blocks (A), (A ') by the concave wall portion (36), (38) A backwash recovery path C is formed.

The backwash recovery passage C is covered with a cover 50 having a dispersion hole 48.

In the present invention, as shown in FIG. 4, the upper wall of the unit hole blocks A and A 'is formed by forming bridges 54 having wedge-shaped ends 52 at both lower ends of the cover 50, as shown in FIG. It is preferable to be able to fit in the hole 56 formed in the (16) to increase the protection effect of the backwash recovery passage (C) in addition to the separation prevention effect.

The present invention configured as described above can be installed while adjusting the horizontal state of the unit perforated blocks (A) easily and accurately, and can be constructed more firmly adjacent unit perforated blocks (A), adjacent units Since the hole blocks A share the backwash recovery path C, the space between the adjacent unit hole blocks A can be effectively used, and the structure of the unit hole blocks A can be simplified. In addition to reducing manufacturing costs, the structural strength of the unit perforated block (A) itself can be improved to extend the service life.

Claims (3)

It has a bottom wall 10, an outer wall 12, 14 and the upper wall 16, the dispersion hole 18 is formed in the upper wall 16, the upper wall 16 in the inner corner of the bottom wall 10 A plurality of compartments 24, 26, and 28 are formed by a pair of partition walls 20 and 22 extending toward), and the orifices 30 are formed in the partition walls 20 and 22. In the lower collecting device hole block, the outer walls 12 and 14 are formed with protrusions 32 and 34 that are upwardly bent, and the upper wall 16 and the outer walls 12 and 14 meet each other. A perforated block for the lower collecting device, wherein the concave wall parts 36 and 38 are formed, and the orifice 40 is formed in the horizontal and vertical directions of the concave wall parts 36 and 38. The unit hole blocks A and A 'having the upwardly bent projections 32 and 34 formed on the outer walls 12 and 14 are anchor bolts 42 and the projections 32 and 34. After fixing the first nut 44 and the second nut 46 fastened to the anchor bolt 42 at the upper and lower sides of the concrete mortar (B) between the connection of the unit hole block (A), (A ') Pour concrete mortar (B) only in the remaining portion except the concave wall portion (36), (38) of the unit hole block (A), (A ') between the unit hole block (A), (A') Construction method of the lower collecting device for the air hole block, characterized in that the construction to be formed so that they share the backwash recovery path (C). The lower collecting device according to claim 1, wherein the bridge (54) of the cover (50) having the dispersion holes (40) can be fitted by forming a hole (56) in the upper wall (16). Dragon Pore Block.