JPS6149000B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a septic tank.
The upper surface part is a flat surface part 2, the end plate 3 is fitted into the side opening of the cylindrical tank body 1, the upper part of the end plate 3 is made into a convex part 4 projecting outward, and the upper surface of the convex part 4 is made flat. As the flat surface portion 5, the flat surface portion 5 on the top surface of the end plate 3 and the flat surface portion 2 on the top surface of the tank body 1 are substantially flush with each other, and the end plate 3
The inner surface of the convex portion 4 is used as a disinfection chamber 9, and the mirror plate 3
This relates to a septic tank characterized in that a manhole hole 16 is bored from the flat surface portion 5 of the tank body 1 to the flat surface portion 2 of the tank body 1.

Diameter 1500 to 2500 for medium and large septic tanks
A manufacturing method is known in which a septic tank is formed by using a cylindrical tank body 1 with a diameter of 1 mm, horizontally placed, and fitting end plates 3 at both ends. Here, the tank body 1 is formed by rotation molding of FRP. The advantages of this system are that the cylindrical tank 1 can be formed by a machine, so the molding cost is low, and that the capacity can be easily changed by changing the length of the cylindrical tank 1. That is, as long as there are molds for the cylindrical tank body 1, end plate 3, and internal parts, the number of molds is extremely small, and it is possible to produce a wide variety of types. However, the disadvantage of this method is that capacity and length are proportional, so the length of each chamber is determined by capacity, and the larger the tank, the wider the space between each chamber.
The smaller the tank, the narrower it becomes. Therefore, even if a manhole tube 17 is provided for inspection of each room, there may be cases where the space is not available in a small tank. Of course, such cases will not occur if the tank is limited to large tanks, but the above-mentioned features cannot be taken advantage of, and in addition, the equipment cost may be high, so it is not a good idea from an economic standpoint. . As for the small tank, the capacity is only the 3 parts of the end plate.
Since it can also serve as a sedimentation chamber and a disinfection chamber, it may be impossible or very difficult to provide a manhole tube 17 at the top. However, increasing the capacity beyond the specified value in order to provide the space cannot be adopted due to cost considerations. In addition, for the separate contact air type, 50% of the contact material is inside the air chamber.
Since it is specified that the partition plate should be filled with water, it is necessary to make the partition plate a special shape (for example, make a part of the partition plate convex in order to install a manhole at the top),
It is difficult to install the contact material block at an angle because it becomes impossible to fill the contact material block efficiently and, furthermore, it becomes impossible to secure a space for cleaning work.

The present invention was invented in view of the above-mentioned conventional drawbacks, and its purpose is to use the recess on the inner surface of the convex portion of the end plate as a disinfection chamber, and to widen the distance between each chamber. To provide a septic tank in which even a small tank can be constructed with a manhole opening so that it can be inspected by serving both as a disinfection room and an aeration room, and in which the overall structure can be simplified.

The present invention will be explained in detail below with reference to Examples. In the figure, reference numeral 1 indicates a horizontally cylindrical tank body, which is formed by rotary molding of FRP. The lower surface of is a lower flat surface portion 6 that is flat over the entire length. Here, since the lower surface is a lower flat surface portion 6, it can be stably installed. A rib 10 is provided around the outer periphery of the tank body 1 integrally with the tank body 1. A mirror plate 3 is fitted into the side opening of the tank body 1. One of the mirror plates 3a fitted into the openings on both sides has a convex portion 4 projecting outward at the upper center thereof, and the upper surface of the convex portion 4 is a flat surface portion 5. Further, the upper surface portion of the other mirror plate 3b also forms a flat surface portion 5. The mirror plates 3a and 3b are provided with an annular fitting portion 7, and a horizontal rib 8 is provided approximately at the center of the mirror plates 3a and 3b to prevent floating and to provide reinforcement, and the lower portion is provided with a hopper effect. It has an oblique shape. Mirror plate 3a, 3
In b, the fitting part 7 is fitted into the opening of the tank body 1 and fixed with adhesive. Here, the flat surface portion 5 of the mirror plate 3 and the flat surface portion 2 of the tank body 1 are substantially flush with each other.
The protruding outer surface of the protrusion 4 is a substantially vertical surface, and a disinfection chamber forming member 28 is fixed to the inner surface of the protrusion 4, so that a disinfection chamber 9 is formed on the inner surface of the protrusion 4. The inside of the tank body 1 is divided into a separation chamber 1 by a first partition plate 11.
2 and an aeration chamber 13, and a second partition plate 14 partitions the aeration chamber 13 and a precipitation chamber 15 formed within the end plate 3. A manhole hole 16 is bored so as to span the flat surface portion 5 on the top surface of the convex portion 4 of the end plate 3a and the flat surface portion 2 on the top surface of the tank body 1, and a manhole tube 17 is formed around the manhole hole 16.
The mounting portion 18 is fixed using adhesive, fasteners such as bolts and nuts, or a combination of these. In this case, since the manhole hole 16 is drilled across the flat surface portion 5 and the flat surface portion 2, it can be easily and reliably drilled in the prescribed position, and since the manhole tube 17 is attached to the flat surface, it can be easily and reliably drilled. It can be attached, and the flat surface part 5
Since the manhole tube 17 is installed across the flat surface portion 2, the manhole tube 17 connects the end plate 3a.
(i.e. disinfection chamber 9, sedimentation chamber 15 and tank body 1)
The aeration chamber 13 inside can be inspected.
In other words, even if the septic tank is made small, the disinfection chamber 9 can be provided on the end plate 3a, so the overall capacity can be reduced by using a tank body 1 with the same diameter as in the case of a large septic tank but with a shorter length. Even if only the separation chamber 12 and the aeration chamber 13 are provided in the tank body 1, the necessary space for the separation chamber 12 and the aeration chamber 13 can be secured, and the disinfection chamber 9 can be provided in the mirror plate 3a. However, the aeration chamber 13 and the disinfection chamber 9 can be inspected using a single manhole pipe 17. In the figure, 19 is a manhole hole provided in another part of the flat surface 2 of the tank body 1, and around this manhole hole 19, another manhole tube 21 for inspection is fixed. 21 to inspect the inside of the separation chamber 12. In the figure, 22 is a manhole cover. Further, 23 is an inlet, 24 is an outlet, 25 is an aeration pipe, and 26 is a chemical cylinder. The wastewater flows from the inlet 23 to the separation chamber 12, and the advection pipe 2
7 to the aeration chamber 13, from the aeration chamber 13 to the precipitation chamber 15, and the supernatant liquid in the precipitation chamber 15 flows to the disinfection chamber 9 and is discharged to the outside from the outlet 24.

In the present invention, as described above, since the end plate is fitted into the side opening of the horizontally oriented cylindrical tank, the capacity can be easily changed by selecting the horizontal length of the cylindrical tank, making it possible to create a large-sized tank. , a small septic tank can be easily assembled and formed, and the top surface of the tank body is a flat surface, the top of the mirror plate is a convex part that protrudes outward, and the inner surface of the convex part is used as a disinfection chamber. , the inner surface of the convex part of the end plate can be effectively used as a disinfection chamber, and the overall structure can be simplified.As a result, there is no need to form a disinfection chamber inside the tank, and the tank is small and has a short horizontal length. Even if it is, sufficient space can be secured for the separation chamber and aeration chamber in the tank body, and the flat surface part of the top surface of the head plate and the flat surface part of the top surface of the tank body are almost flush with each other, so that the flat surface of the head plate Since the manhole hole is drilled from the surface to the flat surface of the tank body, the manhole hole can be easily and reliably formed even in a small tank, and the manhole pipe can be easily attached, making it possible to easily attach the manhole tube to the convex part. Even if the disinfection chamber is formed on the inner surface side, the disinfection chamber on the inner surface side of the convex portion and the aeration chamber of the tank body can be inspected from the manhole tube. As described above, although the present invention can be mass-produced by rotary molding in which the tank body is horizontally cylindrical, it can also be applied to small-sized tanks in which a horizontally cylindrical tank body has not been conventionally used.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the conventional example, Fig. 2 is a front sectional view of the present invention, Fig. 3 is a schematic side sectional view of the tank body used in the above, and Fig. 4 a, b, c, and d are the same as the above. A top view, a front view, a sectional view taken along the line X-X in FIG. 4b, and a sectional view taken along the Y-Y line in FIG. 4 is a convex portion, 5 is a flat surface portion, 9 is a disinfection chamber, and 16 is a hole for a manhole.

Claims (1)

[Claims] 1 The upper surface of the horizontally cylindrical tank body is a flat surface,
An end plate is fitted into the side opening of a cylindrical tank body, and the upper part of the end plate is made into a convex part that protrudes outward, and the upper surface of the convex part is made a flat surface part, so that the flat surface part of the upper part of the end plate and the tank body are formed. The flat surface of the upper surface is almost flush with the top surface, the inner surface of the convex part of the end plate is used as a disinfection chamber, and a hole for a manhole is bored from the flat surface of the end plate to the flat surface of the tank body. A septic tank.