KR200186200Y1 - A block used for underdrain - Google Patents

Abstract

This paper is about the lower collecting device perforated block which makes equal distribution of air and water when backwashing in the rapid filter paper. The perforation which can share the backwash recovery channel and easily adjust the horizontal posture between unit perforated blocks In order to provide a block, the outer walls 12 and 14 are provided with upwardly bent projections 32 and 34, which can be fixed by anchor bolts 42, first nuts 44 and second nuts 46. At the site where the upper wall 16 and the outer wall 12, 14 meet each other, a hole perforated block formed with the concave wall portions 36 and 38 providing a backwash recovery passage is constructed as a unit hole block. Perforated block for lower collecting device.

Description

Perforated block for bottom collecting device {A block used for underdrain}

This paper relates to the airflow block for the lower collecting device, which makes equal distribution of air and water during backwashing in a rapid filter paper.

More specifically, it relates to a pore block that can be backwashed and easy to install by injuring sediment during backwashing even at a connection portion of a pore block and an adjacent pore block.

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 neighboring perforated blocks can be used by the adjacent perforated blocks. In the installation, the present inventors have found out that all the problems of the prior art can be solved if they can accurately adjust their horizontal posture before placing concrete mortar between the porous blocks.

Therefore, this paper aims to provide a perforated block that can share the backwash recovery path and adjust the horizontal posture easily and accurately.

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

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 the construction method of the hole block according to the present proposal

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

As shown in Figs. 1 and 2, the present invention has a bottom wall 10, an outer wall 12, 14, and an upper wall 16, and a dispersion hole 18 is 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 perforated 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 this paper, as shown in FIG. 4, the upper and lower walls of the unit hole blocks A and A 'are formed by forming bridges 54 having wedge-shaped ends 52 at both lower ends of the cover 50. 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) as well as the separation prevention effect.

When the construction of the unit hole block (A) is constructed in this way can be installed while adjusting the horizontal state of them easily and accurately, it is possible to construct the adjacent unit hole blocks (A) more firmly, 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 (2)

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 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.