JP2002096082A - Mounting structure of partition plate and septic tank for polluted water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of a partition plate suitable even for mounting a deformed partition plate having a bent part in a tank. SOLUTION: Recessed or protruding ribs 8a protruding into the inside of a septic tank are formed on the outer tank 8 of the septic tank. The both ends of a partition plate 9 are overlapped on the ribs 8a in the inside of the septic tank and the partition plate 9 and the ribs 8a are firmly fixed with a fixing material in the overlapped part. Fixing by the fixing material is carried out by using an adhesive material, by fitting the recessed grooves and protruding grooves, by using joining tools or the like or by combining the above means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a partition plate mounting structure and a sewage treatment tank. More specifically, the present invention relates to a sewage treatment tank for treating sewage or wastewater such as human waste and gray water, and more particularly to a sewage treatment tank characterized by a structure for mounting a partition plate.

[0002]

2. Description of the Related Art Sewage treatment tanks are usually buried in soil, and various reinforcing structures have been devised so as to withstand earth pressure. One of them is to provide reinforcing ribs on the outer tank of the septic tank (Japanese Patent Laid-Open No. 7-1370).
No. 70, etc.).

[0003] The inside of a sewage purifying tank is usually functionally divided into a plurality of tanks (or chambers) by a partition plate. Various structures for attaching a partition plate to a septic tank (outer tank) have been conventionally known, and an example thereof is shown in FIG. This example is a method of fixing a partition plate to a reinforcing rod-like rib provided inside an outer tub using a fixing tool such as a bolt and a nut (Japanese Patent Laid-Open No. 7-329095).

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a partition plate mounting structure different from a conventionally known mounting structure. It is an object of the present invention to provide a partition plate mounting structure suitable for mounting a deformed partition plate having a bent portion in a tank, and a sewage purification tank using the same.

[0005]

In order to achieve the above object, the partition plate mounting structure of the present invention has the following configuration. That is, according to the present invention, the uneven ribs 8a projecting toward the inside of the septic tank are formed on the outer tank (outer wall) 8 of the septic tank, and both ends of the partition plate 9 are overlapped with the uneven ribs 8a inside the septic tank. The partition plate mounting structure is characterized in that the partition plate 9 and the concave and convex ribs 8a are firmly fixed by a fixing member at the joining portion.

Here, the fixing with the fixing material can be performed by using an adhesive, fitting the concave groove and the convex groove, a fastener (fixer), or a combination thereof.

[0007] The present invention also relates to a sewage treatment tank utilizing the above-mentioned mounting structure.

Such a sewage treatment tank is preferably a sewage treatment tank provided with an anaerobic treatment tank, an aerobic treatment tank, and a disinfection tank in order from the upstream side. Here, the anaerobic treatment tank may be further divided into two chambers, or these tanks may have a flow rate adjusting function. Further, a sedimentation tank or a filtration tank can be provided after the aerobic treatment tank.

[0009]

According to the mounting structure of the present invention, uneven ribs are formed on the outer tank, and both ends of the partition plate are aligned with a part of the uneven ribs and the partition plate is fixed, so that the pressure resistance of the sewage purification tank is improved. In addition to the simple (flat) partition plate installation,
Even when a deformable partition plate having a bent portion is mounted in the tank, it can be easily applied by forming a bent uneven rib on the outer tank.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below more specifically with reference to the accompanying drawings. FIG. 1 shows a sewage purification tank according to a first embodiment of the present invention. From the upstream side, each partition plate 9
Treatment tank (first chamber) 1, anaerobic treatment tank (second chamber) 2, aerobic treatment tank 3, sedimentation tank 4, and disinfection tank 5
Are arranged in this order. The outer tank (outer wall) of the septic tank is composed of an upper tank and a lower tank, and the upper tank and the lower tank are joined at a joining portion (flange) 8b. As shown in FIGS. 1A and 1B, an uneven rib 8a protruding inside the septic tank is provided.

FIG. 2 is a partially enlarged view of the mounting portion (P in FIG. 1) of the partition plate. The anaerobic treatment tank (first chamber) 1 and the anaerobic treatment tank (second chamber) 2 are partitioned by a partition plate 9, and the partition plate 9 is joined to the uneven ribs 8 by an adhesive 10.

The structure of the mounting portion of the partition plate may have various structures other than the example shown in FIG. Various structural examples are shown in FIGS. FIG. 3 shows an example in which a groove 11 is provided in the concave and convex ribs for guiding the application of the adhesive. Assuming a household sewage treatment tank, the shape of the groove 11 is about 1 to 2 mm in depth (when a urethane-based adhesive is used as an adhesive) and the width is 1.
It is about 0 to 20 mm.

FIG. 4 shows a fastening tool (fixing tool) 1 such as a tapping screw for assisting and reinforcing the adhesive until it hardens.
This is an example in which the partition plate is fixed to the concave and convex ribs by No. 2.
In this case, a sealant may be used instead of the adhesive. A butyl-based sealing material or the like can be used as the sealing material.

FIG. 5 shows that a rib 13 is provided on the partition plate, a deep groove 11 is provided on the concave / convex rib corresponding to the rib 13, and the rod 13 and the groove 11 are fitted together with the use of an adhesive. It is an example to make it. The projection shape of the rod-shaped rib 13 is thickness 3
The height can be about 6 mm and the height can be about 10 to 40 mm. In the case of this example, positioning during assembly is easy.

The partition plate is not limited to a flat partition plate as shown in FIG. In some cases, a partition plate with a bent portion at a middle height is used. FIG. 6 (an external front view) shows an example of a sewage purification tank using a partition plate having a bent portion, and FIG. 7 shows an internal configuration diagram thereof. The sewage purification tank is composed of an anaerobic treatment tank (sedimentation / separation tank) 21, a flow control tank 22, and an aerobic treatment tank 2, which are separated from each other by a partition plate from the upstream side.
3. The sedimentation tank 24 and the disinfection tank 25 are arranged in this order. Between the sedimentation separation tank (anaerobic treatment tank) 21 and the flow rate adjustment tank 22, a partition plate 9 having a bent portion at a middle height is provided.
are separated by a.

As can be seen from FIG. 7, a bent portion (a throttle portion)
In the lower part, the lower half of the sedimentation / separation tank (anaerobic treatment tank) 21 projects toward the flow control tank 22 (in other words, the flow control tank 22 is settled and separated in the part above the bent part). The lower part of the sedimentation / separation tank (anaerobic treatment tank) 21 is large (conversely, the lower part of the adjacent flow rate adjustment tank 22 is small). The shape of the concave and convex ribs 8a is
It has a bent shape like the partition plate 9a.

The flow of sewage will be described with reference to FIG. First, the sewage (raw water) is settled and separated from the inlet 6 (anaerobic treatment tank).
21, the mixture is separated into solid and liquid, subjected to anaerobic treatment, and then transferred to the flow control tank 22. The liquid that has entered the flow rate adjustment tank 22 is pumped by the air lift pump 14 and sent to the aerobic treatment tank 23. In the aerobic treatment tank 23, oxidation and decomposition of organic matter and nitrification of ammonia are performed by aeration, and then the sedimentation tank 24
Advancing to Finally, it is sterilized in the disinfection tank 25 and discharged from the outlet 7.

As shown in the sewage purification tank of FIG. 7, if the volume of the lower part of the sedimentation / separation tank (anaerobic treatment tank) 21 is larger than that of the upper part, the sludge deposited on the bottom of the tank 21 Sludge) is hardly affected by the flow of the liquid, and the anaerobic reaction proceeds there without the accumulated sludge flowing out to the next tank. When the anaerobic reaction of the sedimentation sludge proceeds, the sedimentation sludge is digested, so that the capacity required for storing the sedimentation sludge is small.

[0019]

The mounting structure of the present invention is different from the conventionally known mounting structure. This mounting structure is a particularly effective method not only for mounting a simple flat partition plate in the tank, but also for mounting a deformed partition plate having a bent portion. The sewage purifying tank of the present invention has excellent pressure resistance because the outer tank has uneven ribs and the partition plate is fixed to a part of the uneven ribs. Further, in a sewage purification tank using a partition plate having a bent portion, the purification function is further improved, and compactness is possible.

[Brief description of the drawings]

FIG. 1 is a sewage purification tank according to a first embodiment of the present invention,
(A) is a plan view, (B) is a front view, and (C) is a side view.

FIG. 2 is a partially enlarged view of a mounting portion of a partition plate (part 1).

FIG. 3 is a partially enlarged view of a mounting portion of a partition plate (part 2).

FIG. 4 is a partially enlarged view of a mounting portion of a partition plate (part 3).

FIG. 5 is a partially enlarged view of a mounting portion of a partition plate (part 4).

FIG. 6 is a front view of a sewage purification tank according to a second embodiment of the present invention.

FIG. 7 is a configuration diagram of a sewage purification tank corresponding to FIG.

FIG. 8 is a partially enlarged view (plan view) of a mounting portion of a partition plate in a conventional sewage purification tank.

[Explanation of symbols]

1: Anaerobic treatment tank (first chamber) 2: Anaerobic treatment tank (first chamber)
3): Aerobic treatment tank 4: Sedimentation tank 5: Disinfection tank 6: Inlet 7: Outlet 8: Outer tank (outer wall) of sewage purification tank 8a: Uneven rib 8b: Joint between upper tank and lower tank 9 : Partition plate 9a: Partition plate with bent portion 10: Adhesive material 11: Groove 12: Fastener (fixing tool) 13: Bar-shaped rib 14: Air lift pump 21: Anaerobic treatment tank (or sedimentation separation tank) 22: Flow rate adjustment Tank 23: Aerobic treatment tank 24: Sedimentation tank 25: Disinfection tank 4

Claims (4)

[Claims] 1. An uneven rib protruding inward is formed on an outer tank of a septic tank, and both ends of a partition plate are overlapped on the uneven rib inside the septic tank, and this is fixed with a fixing material at the overlapping portion. The mounting structure of the partition plate. 2. The mounting structure according to claim 1, wherein the fixing by the fixing member is fixing by an adhesive, fitting of a concave groove and a convex groove, a fastener, or a combination thereof. 3. A sewage purification tank having the mounting structure according to claim 1. 4. The sewage treatment tank according to claim 3, further comprising an anaerobic treatment tank, an aerobic treatment tank, and a disinfection tank in order from the upstream side.