JPS5920433Y2 - Odor control device for manhole covers - Google Patents

Description

[Detailed description of the invention] This invention relates to a deodorizing device for a manhole cover, and its purpose is to provide a deodorizing device for a manhole cover that can prevent odors generated from the sewage passage from the porous part of the manhole cover in a water-sealed state. We do not intend to provide such services.

An embodiment of this invention will be described below with reference to the drawings.

In the drawings, 1 is the outer frame of the manhole M, which is round in this example.

Reference numeral 2 denotes a sewage waterway, and 3 a manhole cover that is fitted into the mouth edge 4 of the outer frame, and a porous portion 5 is formed therein.

A main flange 7 that engages with the mouth edge 4 of the manhole M is bulged out on the upper part of the water receiving board MU having the healthy brain 6, and a plurality of drainage holes 8 to 8 are provided on the upper side of the circumferential surface of the board side 6. 8 are drilled in a scattered manner.

Note that this water receiving plate MU is formed into the round shape shown in the figure, and it is desirable that its material be molded from a highly corrosion-resistant plastic material or stainless steel plate, etc. together with the next water guide frame DW, but this material is not limited. For example, it may be a cast product.

At the upper part of the water guide frame DW, which has an annular water guide port 9 in the center thereof, a top plate 10 having a sub-flange that overlaps with the main flange 7 is bulged out from the top of the water guide port 9.

The bottom plate 11 of the water receiving plate MU and the lower edge 12 of the water inlet 9
A communication portion 13 for flooding is formed with a gap between the two.

Note that the entire device in which the water receiving board MU and the water guide frame DW are integrated is referred to as the odor-proofing board BT.

Next, the functions and effects of the device having the above configuration will be explained.

Now, before fitting the manhole cover 3 to the mouth edge 4 of the outer frame 1 of the manhole M, the deodorizing board body BT of this example is fitted in advance.

Then, when water is poured into this deodorizing board BT, each drain port 8
In steps 8 to 8, the water level H of the flooding is determined, and thereafter it is only necessary to cover the manhole cover 3.

When the device of this example is set as described above, the odor from the sewage waterway 2 to the manhole M reaches the drain ports 8 to 8, but is released to the outside of the manhole cover 3 by the water sealing means due to the water level H of the flooded water. This is where the deodorizing effect of the present invention comes into play.

Moreover, even if the gas pressure inside the manhole M becomes extremely high, in that case, the gas pressure that exceeds the atmospheric pressure will be
It is also possible to ensure safety by passing through the manhole cover 3 and dissipating it into the atmosphere through the porous part 5 of the manhole cover 3.

The device of this example also has the advantage that rainwater falling from the cover 3 of the manhole M can be used to maintain the water sealing means.

Another example of the present invention is characterized in that the bottom plate 11 of the water receiving board MU is provided with a drain plug 11M in the center of the water (see FIG. 1), which facilitates the drainage of stored water.

In other words, the present invention is an extremely practical deodorization device for manhole covers.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view, FIG. 2 is a cross-sectional view, and FIG. 3 is a perspective view of the water receiving plate. Water receiver MU, water guide frame DW, communication part 13 and drain port 8°

Claims (2)

[Scope of utility model registration request] (1) A deodorizing device for a manhole cover, characterized in that the device is configured as follows. (A) On the upper part of the water receiving plate with a healthy brain, a main flange that is engaged with the mouth edge of the manhole is bulged and -L of the healthy brain side peripheral surface is formed.
Drill multiple drainage holes in a scattered manner on one side. (B) At the top of the water guide frame having an annular water guide port in the center thereof, a top plate having a sub-flange that overlaps with the main flange bulges out from the top of the water guide port. (C) A communication portion for flooding is formed between the bottom plate of the water receiving plate and the lower end edge of the water inlet. (2) In the deodorizing device for a manhole cover as described in item 1, a part of the bottom plate of the water receiving plate is provided with a drain plug.