KR20230021330A - The backward flowing prevention system of manhole - Google Patents

Abstract

The present invention relates to a backflow prevention system of a manhole, comprising: a manhole (100) provided around a building or a road to drain rainwater, and provided with a manhole cover (120) detachably assembled on the upper surface thereof and a drain (101) of a prescribed diameter on the bottom thereof; a chamber housing (110) formed in a potbellied shape on the lower end around the drain (101) of the manhole (100), and provided with a connection flange (140) and an outlet (102) on the lower surface thereof; a sewer pipe (200) having an inlet (211) and a flange (210) coupled to the connection flange (140) of the chamber housing (110) while buried at a prescribed depth in the ground to introduce rainwater through the manhole (100); and a buoyancy ball (130) installed in the chamber housing (110), opening the outlet (102) when rainwater flows into the manhole (100), and rising by buoyancy when water of the sewer pipe (200) flows backward to block the drain (101). When water does not flow into the manhole (100), the buoyancy ball (130) blocks the outlet (102). If the water of the sewer pipe (200) flows backward to the chamber housing (110), the buoyancy ball (130) blocks the drain of the manhole to prevent backflow.

Description

The backward flowing prevention system of manhole}

The present invention relates to a backflow prevention system of a manhole provided in a road or building for draining rainwater, and more particularly, due to heavy rain in the summer monsoon season, the amount of rainwater flowing into the manhole drain is higher When there is a lot of water flowing back into the drain, it quickly blocks the drain to prevent the water from flowing backward, and when there is no water flowing into the drain, it relates to a manhole backflow prevention system that can block odors or insects from rising from the sewage pipe.

In general, drains of manholes installed on roads or around buildings to receive and discharge rainwater are installed at the starting point or intersection of a pipe, at a point where the thickness or direction of a pipe changes, or at a midpoint of a long pipe, and the entrance to the surface is A manhole cover with multiple drainage holes is covered, and the lower part is installed in a structure connected to a sewage pipe buried in the ground.

As the prior art related to the drainage of the manhole, there is "automatic drain opening and closing device for sewer manhole" of Korean Patent Publication No. 10-2002-0096223 (published on December 31, 2002) disclosed in the patent documents of the prior art documents below. .

In the prior art, a sieve is installed on the discharge passage of the manhole, so that only the water is discharged while the rainwater and foreign substances flowing into the manhole are filtered by the sieve, and on the bottom of the cap member that blocks the upper part of the sieve, a float that rises and falls along the guide bar If there is water flowing in through the hole of the manhole cover, the float rises to open the discharge passage, and if there is no inflow water, the float blocks the discharge passage to prevent odors and pests from coming out of the manhole.

However, if the ground elevation of the place where the manhole is installed is low compared to other places, when excessive rainwater flows into the sewer pipe in a short time due to sudden heavy rain, such as during the rainy season, the rainwater rises through the drain of the manhole and flows backward through the drain hole of the manhole in a large amount of rainwater comes out, so the area around the manhole suffers from flooding with a large amount of backflowed rainwater.

In the prior art, when the rainwater flows back through the drain of the manhole due to excessive rainwater inflow, the float immediately rises along the guide bar and opens the discharge passage, so that the backflowing rainwater comes out to the ground through the manhole and suffers a flood, and many of the manhole covers backflow When it is opened by the amount of rainwater, a serious problem arises in that passers-by fall into it and become dangerous.

Republic of Korea Patent Publication No. 10-2002-0096223 (published on December 31, 2002) "Automatic drain opening and closing device for sewer manhole"

The present invention was developed to improve the problems of the prior art, and the object of the present invention is that if the water flowing back from the underground sewer pipe to the upper drain is greater than the amount of rainwater flowing into the drain of the manhole due to heavy rain in the summer rainy season It is to provide a backflow prevention system of a manhole that quickly blocks a drain so that water does not flow back.

Another object of the present invention is to provide a system for preventing backflow of a manhole, in which a buoyancy ball rises more quickly when water in a sewer pipe flows back into a drain, thereby blocking the drain more quickly.

In order to achieve the above object, the present invention is provided around roads or buildings for drainage of rainwater, and a manhole cover is detachably assembled on the upper surface and a drain hole of a predetermined caliber is provided on the bottom; A chamber housing provided in a pot-bellied shape at the bottom of the manhole centering on the drain hole and having a discharge port and a connection flange on the bottom surface; A sewage pipe buried at a predetermined depth in the ground, provided with a flange coupled to a connection flange of the chamber housing and an inlet through which rainwater flows through a manhole; It is installed inside the chamber housing, opens the outlet when rainwater flows into the manhole, and rises when the water in the sewage pipe flows backward to block the drain; characterized in that it consists of.

Another object of the present invention is to form the lower end of the chamber housing in a semicircular pot-bellied shape, and the upper end of the chamber housing is formed in a conical shape with a gradually smaller diameter from the lower end toward the drain of the manhole, so that the water in the sewer pipe flows backward. This can be achieved by allowing a buoyancy ball made of a hollow ball to rise quickly when it becomes.

In the present invention, when the amount of rainwater flowing back from the underground sewage pipe to the upper drain is higher than the amount of rainwater flowing into the drain of the manhole, the buoyancy ball of the chamber housing rises to quickly block and block the drain, so that the rainwater in the sewer pipe flows back into the manhole. can be effectively prevented.

Normally, when there is no water flowing into the manhole drain, the buoyancy ball blocks the discharge hole at the bottom of the chamber housing, so it can effectively block odors or insects from coming up through the sewer pipe.

1 is a state diagram in which the buoyancy ball blocks the outlet in the manhole in which the present invention is practiced
Figure 2 is a state diagram in which the buoyancy ball is moved to one side when rainwater flows into the manhole of the present invention
3 is a state diagram in which the drain is blocked when the water in the sewer pipe flows backward in the present invention

Hereinafter, a manhole backflow prevention system according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing a state in which the buoyancy ball blocks the outlet in the manhole in which the present invention is practiced, and FIG. 2 is a cross-sectional view showing a state in which the buoyancy ball is moved to one side when rainwater flows into the manhole of the present invention.

As shown in this, the manhole backflow prevention system according to the present invention is characterized in that it consists of a manhole 100, a chamber housing 110, a sewage pipe 200, and a buoyancy ball 130.

The manhole 100 is provided around roads or buildings to drain rainwater, and a manhole cover 120 is detachably assembled on the upper surface and a drain 101 of a predetermined diameter is provided on the bottom.

The chamber housing 110 is provided in a pot-bellied shape at its lower end with the drain port 101 of the manhole 100 as the center. In addition, an outlet 102 and a connection flange 140 are provided on the bottom surface of the chamber housing 110 .

The sewage pipe 200 is a general sewage pipe buried in the ground at a predetermined depth, and is provided with a flange 210 coupled to the connection flange 140 of the chamber housing 110 and an inlet 211 so as to flow in through the manhole 100. It receives rainwater and transports it to a designated location, such as a rainwater sewage treatment plant.

The buoyancy ball 130 is installed to be freely movable inside the pot-bellied chamber housing 110.

In the present invention, the buoyancy ball 130 goes down the chamber housing 110 curved in a pot-bellied shape by its own weight at normal times when rainwater does not flow into the manhole 100, and as shown in FIG. 1, the outlet 102 is blocking Therefore, odors or bugs of the sewage pipe 200 are prevented from coming out through the manhole 100.

In this state, when rainwater is introduced through the hole of the manhole cover 120, the buoyancy ball 130 is moved to one side as shown in FIG. 2 by the rainwater entering the bottom of the chamber housing 110 and opens the outlet 102, so that the rainwater After flowing into the sewage pipe 200, it is moved to a rainwater sewage treatment plant or the like along the sewer pipe 200.

At this time, when the amount of water flowing back from the sewage pipe 200 in the ground is greater than the amount of rainwater flowing into the drain 101 of the manhole 100 due to heavy rain, the buoyancy ball 130 in the chamber housing 110 rises upward as shown in FIG. Since the drain 101 is blocked, there is no fear that rainwater in the sewer pipe 200 will flow back into the manhole 100, and then when the amount of backflow water is reduced, the buoyancy ball 130 immediately descends, so the rainwater in the manhole 100 is discharged to the sewage pipe (200).

In the present invention, the buoyancy ball 130 is preferably formed as a hollow ball with an empty inside made of a stainless metal material. Then, even if it is in contact with water for a long time in the chamber housing 110, the buoyancy ball 130 can be prevented from rusting or corroding, and when there is no water in the chamber housing 110, the discharge port 102 is blocked with good weight and However, when water flows in, it can be buoyant more sensitively with good buoyancy due to its hollow interior.

In addition, the lower end 112 of the chamber housing 110 is formed in a semicircular belly shape, and the upper end 111 is formed in a cone shape in which the aperture gradually decreases toward the drain 101 of the manhole 100 from the lower end 112. It is preferable to form it obliquely.

Then, when the water in the sewage pipe 200 flows back into the chamber housing 110, the buoyancy ball 130 quickly rises along the inclined surface of the upper end 111 of the chamber housing 110 and can block the drain 101 more quickly. Therefore, it is possible to effectively prevent the rainwater of the sewage pipe 200 from flowing back into the manhole 100.

Although the invention made by the present inventors has been specifically described according to the above embodiments, the present invention is not limited to the above embodiments, and it is common knowledge in the art that various changes can be made without departing from the gist of the present invention. It will be self-evident to those who have

100: manhole 101: drain
102: outlet 110: chamber housing
111: upper part 112: lower part
120: manhole cover 130: buoyancy ball
140: connection flange 200: sewage pipe
210: flange 211: inlet

Claims (3)

A manhole 100 provided around roads or buildings for drainage of rainwater, with a manhole cover 120 detachably assembled on the upper surface and having a drain 101 of a predetermined caliber on the bottom;
A chamber housing 110 provided in a pot-bellied shape at the lower end of the drain 101 of the manhole 100 as the center, and having a discharge port 102 and a connection flange 140 on the bottom surface;
A sewage pipe 200 having a flange 210 and an inlet 211 coupled to the connection flange 140 of the chamber housing 110 in a state buried in the ground at a predetermined depth so that rainwater flows through the manhole 100;
It is installed inside the chamber housing 110, and when rainwater flows into the manhole 100, the outlet 102 is opened, and when the water in the sewage pipe 200 flows backward, it rises by buoyancy and blocks the drain 101. ball 130;
Manhole backflow prevention system, characterized in that consisting of.
According to claim 1,
The buoyancy ball 130,
A backflow prevention system for a manhole, characterized in that it is a hollow ball made of stainless metal to make the inside empty.
According to claim 1,
of the chamber housing 110
The lower end 112 is formed in the shape of a semicircular belly,
The upper end 111 is inclined from the lower end 112 toward the drain 101 of the manhole 100 in a conical shape with a gradually smaller aperture,
When the water in the sewage pipe 200 flows back to the chamber housing 110, the buoyancy ball 130 quickly rises along the inclined surface of the upper end 111 to block the drain, characterized in that the backflow prevention system of the manhole.

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