JPS632152Y2 - - Google Patents

Description

[Detailed description of the invention] During aeration using the air diffuser pipe used in the activated sludge treatment method used in sewage treatment, etc., the air diffuser pipe may become clogged after the air supply has stopped. The hanging pipe part from which the aeration pipe is suspended was separated by removing the flange at the connection part directly above the tank, and the part was pulled up to inspect and maintain the aeration pipe, but the gas generated in the sewage treatment plant is corrosive, which causes the flange connection bolts to stick, making the work not only difficult, but also dangerous to do manually directly above the tank. There is also a device that has a joint part such as a swivel joint in the air pipe to enable timely lifting, but it is expensive and there is a problem of air leakage from the joint seal.

The present invention eliminates the above-mentioned drawbacks and provides a device with a simple structure and low cost, and its aspects will be explained with reference to examples.

Example As shown in Fig. 1, an air supply pipe 4 is placed horizontally on the upper part of the circumferential wall of an aeration tank 1 for activated sludge, and a branch part with a valve 12 interposed at an appropriate location is arranged, and its tip is connected to the liquid level inside the tank. An insertion tube 5 having a horizontal cut edge 5' and opening upward is provided by forming a vertical tube section at the upper side.

Separately, as shown in FIG. 2, there is a fitting cavity 7' having an inner diameter that corresponds to the insertion tube 5 and can be loosely fitted therein, and a stepped portion at the bottom of the cavity that corresponds to and presses against the mouth edge 5' of the insertion tube 5. A housing 6 is prepared in which a housing 6 is formed by surrounding a cylindrical cavity 9 and a ring-shaped packing 10 is attached to a stepped portion 7.
Further, in the fitting cavity 7', an O-ring 11 is installed in an annular groove 8 formed around the cavity wall. As shown in Fig. 1, an inverted U-shaped air pipe 13 composed of a bend is connected to the upper end of the housing 6, and when a combination of straight pipe and bent pipe is installed at the end of the U-shaped air pipe 13, it is scattered at the lower end. After fabricating and connecting the S-shaped air pipe 14 so that the center of gravity of the hanging air pipe 2 that suspends the trachea 3 is located directly below the housing 6, the housing 6 is fitted to the insertion pipe 5. Therefore, when the device is assembled, the entire weight of the suspended air supply pipe is applied to the mouth edge 5' of the insertion tube 5 through the annular packing 10 of the housing 6, so that the compressive pressure causes the air supply to be carried out together with the action of the O-ring 11. Airtightness is maintained.

That is, for example, if an 80ASGP pipe is used for the air supply pipe and the length of the suspended part is over 6 m in total, the weight of each connection part will exceed approximately 70 kg including attached parts, so the opening of the insertion tube 5 will be The pressure receiving area of 5' is approximately 6cm ²
Since the bonding pressure is considered to be weak, it is about 12 kg/cm ² , so it can sufficiently cope with the aeration pressure of about 1 kg/cm ² .

Then, from the tank wall 1', a support rod 15 is protruded from the tank wall 1' as shown in FIG. 2 can be suppressed.

By doing so, if the air diffuser pipe becomes clogged during the aeration operation and it becomes necessary to inspect it, there is no need to remove the flange joint bolts, etc., and they remain fixed to the inverted U-shaped air supply pipe 13. The housing 6 can be easily removed from the insertion tube 5 by attaching a wire to the hook 16 and the bend and lifting it slightly upwards with a crane.Then, by shaking the lower part of the tube and removing it from the support rod 15, the hanging tube can be removed. The air pipe 2 can be easily lifted onto the tank and serve its purpose.

Although the one shown in Fig. 3 uses two hanging air pipes 2 in parallel to suspend the air diffuser pipe 3, it is also possible to suspend the air diffuser pipe in an inverted T-shape using a single hanging air pipe. .

Since the present invention is implemented as described above, it is possible to make an aeration device that is low cost and easy to handle by effectively utilizing a mechanism that has been neglected in the past.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a side view of the proposed device, FIG. 2 is a longitudinal sectional side view showing a vertical insertion tube and housing fitted together, and FIG. The figure is a front view when two hanging air pipes are used in parallel, and FIG. 4 is a plan view of the support rod. In the figure, 1: aeration tank, 2: hanging air pipe, 3: aeration pipe, 5: vertical insertion pipe, 6: housing.

Claims (1)

[Scope of utility model registration request] When connecting the hanging air pipe 2 that suspends the aeration pipe 3 submerged in the aeration tank 1 and the air pipe 4 above the tank, the vertical insertion pipe 5 and the housing 6 are connected at the joint between the two.
By loosely fitting them through the packings 10 and 11 and making a vertical fitting connection, the weight of the hanging air pipe 2 is diverted to the reduction pressure of the connection part, and the airtightness of the air supply is maintained, and the hanging air pipe is 2. An aeration device characterized by making it easy to attach and detach.