KR102619320B1 - Backflow prevention of sewer - Google Patents

Abstract

The present invention relates to a sewage backflow prevention device, and more specifically, to suppress as much as possible the inner diameter through which sewage flows from being reduced by parts or opening and closing devices, and in addition, when the gate is open, the cross-sectional shape is the inner diameter of the valve body. It was invented to prevent the passage area from being reduced due to the gate by forming a round arc shape as shown, and to enable simple installation by connecting even if deformation occurs in the pipe due to impact or load.
The configuration of the present invention includes a tubular valve body 100 with a penetrating interior,
In the outlet side of the valve body 100, it is rotatably hinged by a hinge 300 and consists of a gate 200 that opens and closes the flow path,
The valve body 100 is made of a soft rubber material and has a plurality of cutting protrusions 400 integrally formed around it to be cut according to the inner diameter of the sewer pipe.

Description

Backflow prevention of sewer}

The present invention relates to a sewage backflow prevention device, and more specifically, to suppress as much as possible the inner diameter through which sewage flows from being reduced by parts or opening and closing devices, and in addition, when the gate is open, the cross-sectional shape is the inner diameter of the valve body. It was invented to prevent the passage area from being reduced due to the gate by forming a round arc shape as shown, and to enable simple installation by connecting even if deformation occurs in the pipe due to impact or load.

In general, the domestic sewage treatment system is structured to collect sewage generated from each household through a common collection well and transport it to a sewage treatment plant, and each household and the collection well are connected through a sewer pipe.

The inlet of the outdoor sewer pipe is connected to the bathroom floor or kitchen sink in the home, and the outlet is connected to a common water sump, so sewage discharged from each home flows into the sump through the sewer pipe.

Meanwhile, the communal water collection well is structured so that it can collect water not only from the outdoor sewer pipes leading to each home, but also from the road surface and sewage manholes for the treatment of rainwater flowing on the road surface.

Therefore, when an excessive amount of rainwater flows into a common sewer pipe through a sewer manhole due to heavy rain or other causes, a phenomenon occurs where it backflows into each home through the sewer pipe.

In addition, during the summer, etc., harmful gases, odors, and pests generated in water collection wells flow into homes through sewer pipes, causing sanitary problems and discomfort.

In order to solve the problem caused by conventional sewage backflow, a backflow prevention device is installed on the discharge side of the outdoor sewer pipe (2) as shown in Figures 1 and 2 to open the flow path when sewage flows normally and prevent backflow of sewage. The city is blocking the flow path.

Conventional backflow prevention devices are mainly configured so that the gate 20 automatically closes due to its own weight.

That is, during normal flow of sewage, the gate 20 is rotated open by water pressure and sewage is discharged (Figure 2).

In addition, when sewage is not discharged, the gate 20 remains closed due to its own weight, thereby blocking the backflow of sewage (Figure 1).

According to the configuration of this weighted backflow prevention device, there is little risk of malfunction due to the operating characteristics, but each hinge part, including the rib 3, which is provided firmly and integrally with the body to securely install the hinge device for opening and closing the cover, is installed inside the passage. Because of its location, it had the disadvantage of reducing the area of the flow path.

In addition, since the gate 20 has a certain thickness and is molded into a disk shape with a certain thickness, the hinge can be moved as shown in FIG. 2 by water pressure when installed in the middle of the sewer pipe 2 or at the discharge port of the water collection well 1. When the gate 20 opens the passage at the center, a blockage portion is formed that blocks part of the passage.

Therefore, as a result of the passage area being greatly reduced by the passage blockage, which occupies a relatively large proportion compared to the entire passage, the drainage capacity is reduced. Therefore, when an excessive amount of rainwater flows into the sewer pipe due to heavy rain, it flows back through the sewer pipe. It became the cause.

In addition, since the gate 20 remains in a state of blocking a portion of the flow path in the fully open state, heavy objects such as stones mixed in sewage often collide with the gate 20.

At this time, the gate 20, which is mainly made of synthetic resin, is easily damaged due to collision, so that it cannot perform the backflow prevention function, and there is a problem that frequent replacement or repair work must be performed.

Meanwhile, since most sewer pipes are buried underground, it is common for their diameter to be deformed due to load or impact.

When deformation occurs, the sewer pipe is distorted or maintains an oval shape, so there was a problem in that the body of the backflow prevention device, which was manufactured considering the circular shape of the normal sewer pipe, could not be installed.

Domestic registered utility model publication No. 20-0396193 (registration date: September 12, 2005) Domestic Registered Patent Publication No. 10-0846664 (registration date: July 10, 2008)

The present invention was invented in consideration of the above-described problems. In particular, by preventing part of the passage of the sewer pipe from being blocked when the gate is open, the drainage capacity is improved by expanding the flow path area, and the backflow of sewage can be completely blocked. The goal is to provide a sewage backflow prevention device.

Another object of the present invention is to provide a sewage backflow prevention device that can significantly improve durability and lifespan by preventing the gate from being damaged by colliding with an object such as a stone.

Another object of the present invention is to provide a sewage backflow prevention device with watertightness and airtightness that can be sealed without a gap when the gate is lowered to block the flow path, completely preventing the backflow of sewage as well as bad odors from entering the home. I'm doing it.

Another object of the present invention is to provide a sewage backflow prevention device that allows the gate to be opened and closed quickly and accurately by guiding a flow path to be formed toward the opposite side where the gate hinge is installed when the flow rate flows in.

Another object of the present invention is that even when deformation occurs in the sewer pipe due to impact or load, it can be installed in any situation by simply changing the outer diameter of the body according to the deformed shape, so that the product has excellent reliability and marketability. Preventive measures are provided.

The present invention for achieving the above object includes a tubular valve body 100 that penetrates the inside,

In the outlet side of the valve body 100, it is rotatably hinged by a hinge 300 and consists of a gate 200 that opens and closes the flow path,

The valve body 100 is made of a soft rubber material and has a plurality of cutting protrusions 400 integrally formed around it to be cut according to the inner diameter of the sewer pipe.

It is preferable that cutting grooves 410 are formed concavely along the length at regular intervals around the cutting protrusions 400.

The gate 200 is molded into an arc-shaped cross-section, and the valve body 100 is formed so that the end of the valve body 10 is curved along the inner surface of the edge of the gate 20 when the gate 20 is closed. The contact surface 130 is molded so that the gate 200 is in close contact with the contact surface 130, and a flange 140 is integrally provided at one end of the valve body 100.

The valve body 100 is divided into an outer body 120 made of a soft rubber material and an inner body 110 that is connected to the inside of the outer body 120 and is molded from a synthetic resin material, and this inner body ( 110) is integrally formed with a guiding member 111 inclined toward the opening opposite to the hinge 300 that opens and closes the gate 200.

Here, the gate 200 is formed to protrude a stop protrusion 210 that contacts the inner diameter of the sewer pipe when it is maximally opened by water pressure.

The present invention as described above has the effect of improving drainage capacity by expanding the flow path area because the cross-sectional shape of the gate is in an open state to form a round arc shape like the inner diameter of the valve body.

In addition, durability and lifespan can be significantly improved by preventing damage from collision with objects such as stones when the gate is open.

In addition, when the gate is lowered to block the flow path, it is sealed without a gap, which has the effect of improving watertightness and airtightness to prevent backflow of sewage and odor.

In addition, when the flow flows into the sump, a flow path is guided to the opposite side where the gate hinge is installed, that is, toward the lower part where the gate is opened, so that the gate can be opened and closed quickly and accurately.

On the other hand, even when deformation occurs due to impact or load in a sewer pipe mainly installed underground, it can be installed in any situation by simply changing the outer diameter of the body according to the deformed shape.

In addition, it prevents cases where the gate overlaps the inner diameter of the sewer pipe and cannot be restored when it is opened as much as possible, resulting in excellent product reliability and marketability.

Figure 1 is a cross-sectional view showing a state in which the gate of a conventional backflow prevention device is lowered and the flow path is blocked.
Figure 2 is a cross-sectional view showing a state in which a flow path blockage is formed by the gate in a state in which the gate of a conventional backflow prevention device is raised and the flow path is opened.
Figure 3 A perspective view showing the configuration of the sewage backflow prevention device of the present invention.
Figure 4 is a bottom perspective view showing the configuration of the gate of the present invention in an open state.
Figure 5 is a longitudinal cross-sectional view showing the configuration of the sewage backflow prevention device of the present invention.
Figure 6 is a longitudinal cross-sectional view showing the configuration of the gate of the present invention in a fully opened state.
Figure 7 is a cross-sectional view taken along line AA of Figure 5.
Figure 8 is a cross-sectional view taken along line BB of Figure 5.
Figure 9 is an enlarged view of part C of Figure 8.
Figure 10 is an exploded perspective view showing an embodiment in which the valve body of the present invention is divided into an inner body and an outer body.
Figure 11 is a longitudinal view of Figure 10.
Figure 12 is a cross-sectional view of Figure 10.
Figure 13 is a device diagram showing a state in which the sewage backflow prevention device of the present invention is installed in a sewage pipe for discharging a water collection well.
Figure 14 is a device diagram showing a state in which the sewage backflow prevention device of the present invention is installed between sewer pipes.

Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated and described in the drawings.

However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be.

On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, embodiments will be described in detail with reference to the attached drawings, but identical or corresponding components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted.

The sewage backflow prevention device according to the present invention is mainly installed in the middle of the outdoor sewer pipe 2 piped from each home, as shown in FIG. 14.

In addition, as shown in Figure 13, it may be installed on the outlet side of the water collection well (1) connected to the sewer pipe (2) on the inside.

This sewage backflow prevention device is largely composed of a valve body 100 that forms the main body, and a gate 200 that is hinged at the outlet side with a hinge 300 to open and close the flow path.

The valve body 100 is molded into a tube shape with a penetrating interior, and a flange 140 is integrally provided at one end for attachment between the sewer pipes 2 and the water sump 1.

The gate 200 is made of a synthetic resin material of a certain thickness and is rotatably hinged on the outlet side of the valve body 100 by a hinge 300 to open and close the flow path.

The cross-sectional shape of the gate 200 is molded into a round arc as shown in FIGS. 7 and 12, and when the gate 200 is lowered and the gap through which the flow path flows is sealed, the gate 200 has a curved edge along the edge of the gate 200. A contact surface 130 is formed to be curved on the end surface of the valve body 100.

Therefore, when the gate 200 is lowered and maintained in a sealed state, the inner edge surface of the gate 200 is in close contact with the contact surface 130 formed on the end surface of the valve body 100, effectively preventing backflow.

FIG. 6 is a cross-sectional view illustrating a state in which the gate 200 is opened when the quantity and pressure of sewage moving through the sewer pipe 2 are discharged to their maximum.

Considering that the gate 200 is opened under maximum water pressure conditions as shown in this figure, the cross-sectional shape of the gate 200 is preferably formed into a round arc shape as similar to the inner diameter of the sewer pipe 2 as possible.

Therefore, since the cross-sectional shape of the gate 20 is formed into a round arc shape that is almost concentric with the sewer pipe 2, when the gate 200 is fully open, it does not block or interfere with the flow path through which sewage moves. This creates conditions for the maximum flow rate to flow smoothly at all times.

Here, a bracket 310 is provided at the upper end of the outlet side of the valve body 100 so that the hinge 300 can be freely attached to the gate 200, and this bracket 310 and the hinge 300 are connected with bolts or rivets. It is attached with fixing means including.

Meanwhile, the valve body 100 of the present invention is made of a soft rubber material, and is characterized by forming a plurality of cutting protrusions 400 integrally around it to be cut according to the inner diameter of the sewer pipe.

Here, cutting grooves 410 are formed concavely along the length at regular intervals around the cutting protrusions 400 so that they can be easily cut to the required height step by step at the position of the cutting groove 410 using a sharp cutting tool or knife. There is an effect. (Figure 9)

Therefore, since most of the typical sewer pipes (2) are buried underground, when the diameter is distorted or deformed into an elliptical shape due to load or impact, the cutting protrusions (400) at the positions requiring cutting are cut into blades in consideration of the deformed shape. It can be easily installed by cutting it into an appropriate shape and quickly responding to it at the work site.

Figures 4, 7, and 12 show the installation positions and shapes of the cutting protrusions 400 provided around the valve body 100 in a bottom perspective view and a cross-sectional view, respectively.

As shown in the drawing, on both sides of the central part of the valve body 100, cutting protrusions 400 that are long up and down and have an arc shape taking into account the inner diameter of the sewer pipe 2 are integrally formed on the outer surface.

In addition, several semicircular cutting protrusions 400 (4 in the drawing) are protruded at regular intervals mainly along the circumference of the bottom of the valve body 100.

In this way, using the cutting protrusions 400 disposed on the side and bottom portions of the valve body 100, the cutting protrusions 400 can be completely removed or the positions of the cutting grooves 410 can be changed depending on the degree of deformation of the sewer pipe 2. Taking this into account, the required height is cut using a cutting tool so that it can be installed with the inner diameter of the deformed sewer pipe (2).

3 to 8 illustrate an embodiment in which the valve body 100 of the present invention is integrally molded from a soft rubber material.

Meanwhile, as shown in FIGS. 10 to 12, the valve body 100 may be separately molded into an inner body 110 made of a hard synthetic resin material and an outer body 120 made of a soft rubber material and then assembled.

At this time, the cutting protrusions 400 are provided on the outer body 120 located on the outside, and the contact surface 130 that contacts the edge surface of the gate 200 is molded on the inner body 110.

Therefore, the contact surface 130 provided on the inner body 110 is molded to protrude more toward the gate 200 than the curved portion 122 provided at the end of the outer body 120, so that the border surface of the gate 200 is protruded from the inner body 110. It is in close contact with the contact surface 130 of 110, and the curved portion 122 of the outer body 120 maintains only a curved surface along the perimeter of the gate 200 and does not make contact.

In addition, it is desirable to mold the inner body 110 integrally with the guiding member 111, which is inclined toward the opening opposite to the hinge 300 that opens and closes the gate 200 (FIG. 11).

Therefore, when sewage flows into the location where the backflow prevention device of the present invention is installed through the sewer pipe (2), the flow path is guided downward at the position of the guiding member 111, so most of the water is located at the bottom of the gate 200. As water pressure is applied, the gate 200 can be opened more quickly and smoothly.

Meanwhile, the gate 200 is formed to protrude a stop protrusion 210 that contacts the inner diameter of the sewer pipe while being maximally opened by water pressure to the outside of the lower end.

This stop protrusion 210 is in contact with the inner diameter of the sewer pipe 2 when the gate 200 is maximally opened as shown in FIG. 6, and the main body of the gate 200, which is formed into a round arc shape by hydraulic pressure, is on the inner side of the sewer pipe. This prevents cases where restoration is not possible due to a problem.

It is preferable that several reinforcing ribs 220 protrude from the outer surface of the gate 200 to reinforce strength, and the stop protrusion 210 protrudes relatively higher compared to the protruding height of the reinforcing ribs 220. When the water pressure of sewage that is momentarily discharged is applied to the gate, only the stop protrusion 210 protruding on the outside of the lower part of the gate 200 is in contact with the inner diameter of the sewer pipe 2, and the outer peripheral surface of the gate 200 is in contact with the sewer pipe (200). When the water pressure of the discharged sewage drops due to no contact with the inner diameter of 2), the gate 200 is closed by its own weight using the hinge 400 as the hinge axis.

The sewage backflow prevention device of the present invention configured in this way has almost no resistance, such as blocking the flow path, when the gate 200 is applied to the maximum flow rate and water pressure.

In addition, when sewage does not flow, the gate 200 is returned by its own weight and remains in close contact with the contact surface 130 of the valve body 100, so the air tightness is excellent, preventing backflow of sewage or bad odors. It can be completely blocked.

In addition, when a large amount of sewage is moved, smooth drainage can always be achieved as a result of controlling the flow path so that the gate 200 can be opened immediately through the guiding member 111.

In addition, even when the shape of the sewer pipe is changed, the external shape of the valve body 100 can be easily processed quickly on site so that the backflow prevention device according to the present invention can be installed in any case.

In the above, the present invention has been described in detail only with respect to the described embodiments, but it is obvious to those skilled in the art that various variations and modifications are possible within the technical scope of the present invention, and it is natural that such variations and modifications fall within the scope of the appended patent claims. will be.

1 - Sump
2 - sewer pipe
100 - Valve body
110 - Inner body
120 - External body
130 - contact surface
200 - Gate
210 - Stop projection
300 - Hinge
400 - Cutting protrusions
410 - Cutting groove

Claims (5)

A valve body 100 in the shape of a tube penetrating the inside,
In the outlet side of the valve body 100, it is rotatably hinged by a hinge 300 and consists of a gate 200 that opens and closes the flow path,
The valve body 100 is made of a soft rubber material, and a plurality of cutting protrusions 400 are integrally molded around it to be cut according to the inner diameter of the sewer pipe,
A sewage backflow prevention device characterized in that cutting grooves (410) are formed concavely along the length at regular intervals around the cutting protrusions (400).


delete In claim 1,
The gate 200 is molded into an arc-shaped cross-section, and the valve body 100 is formed so that the end of the valve body 10 is curved along the inner surface of the edge of the gate 20 when the gate 20 is closed. A sewage backflow prevention device characterized in that the contact surface 130 is molded so that the gate 200 is in close contact with the contact surface 130, and a flange 140 is integrally provided at one end of the valve body 100.
In claim 1,
The valve body 100 is divided into an outer body 120 made of a soft rubber material and an inner body 110 that is connected to the inside of the outer body 120 and is molded from a synthetic resin material, and this inner body ( 110) is a sewage backflow prevention device characterized in that a guiding member 111 inclined toward the opening opposite to the hinge 300 that opens and closes the gate 200 is integrally molded.
In claim 1,
A sewage backflow prevention device, characterized in that the gate (200) is formed to protrude a stop protrusion (210) that contacts the inner diameter of the sewer pipe when it is maximally opened by water pressure.

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