JPH06174151A - Concrete pipe provided with hole having check valve - Google Patents

Abstract

PURPOSE:To prevent water from advance flowing and back flowing from one direction by a pressure of water inside/outside a pipe by providing many through holes in a wall unit of the concrete pipe of drain pipe, catchment pipe, etc., and burying a check valve fitted into each through hole. CONSTITUTION:Many through holes 2 are provided in a pipe wall 1 of a concrete pipe 1-A, and a check valve A is buried to be fitted to each through hole 2. This check valve A is constituted such that stopping protrusion parts 12 are provided in an upper end inside of the periphery 10 and also receiving a ball unit 11 floated vertically movably in the periphery 10, to removably mount a bottom surface cap 13, provided with a filter 15, to an end part in an opposite side to the protrusion part 12 of the periphery 10. In the case of using the concrete pipe 1-A as a catchment pipe, when water in the pipe is at a high pressure, the ball unit 11 is always brought into contact with and closely attached to the protrusion part 12, to impede the water in the pipe from flowing out to the outside of the pipe. However, water outside the pipe rises to increase a pressure due to a heavy rain or the like, the ball unit 12 is lowered down, and the through hole 2 is opened to permit invasion water.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete rainwater storage pipe, drainage pipe and water collection pipe.

2. Description of the Related Art Conventionally, there is a water permeable pipe or a water collection pipe for treating water contained in soil. The purpose of the permeable pipe is to reduce the flow rate of sewage by discharging a large amount of rainwater flowing into the sewer pipe to the ground to reduce the flow rate of the sewage and to prevent the global warming of the city. However, in the case of this permeable pipe, when the water level in the soil rises, on the contrary, water flows into the pipe, increasing the amount of sewage and exceeding the sewage treatment capacity. Also, in the case of a water collecting pipe, when a large amount of water flows into the pipe, the water pressure in the pipe rises and flows backward, which acts as a drainage pipe, which is the opposite of the purpose. As for the storage pipe, in the case of a combined sewer system, as a countermeasure when rainwater due to a large amount of rainfall flows into the sewer, a large amount of rainwater is stored by temporarily storing it in the storage pipe and stopping the pump drainage. A preferable condition required for the storage pipe is that the stored rainwater naturally flows underground. This is because the drainage load of the pump is reduced, but when water exists around the storage pipe, it is not preferable that the water pressure causes the water to flow back into the storage pipe. That is, it is preferable that the water in the storage pipe is a structure that can go out but not inside.

The present invention was developed in order to solve the drawbacks of the conventional drainage pipes, water collection pipes, and storage pipes.

In the concrete pipe of the present invention, a large number of through holes are provided in the wall of the concrete pipe, and a check valve is embedded in the through holes. It provides a concrete pipe that can pass through.

The concrete pipe in which a large number of check valves according to the present invention are embedded and embedded in the wall body works in one direction when used as a drain pipe, and therefore acts on the drain pipe regardless of the water pressure inside the pipe and the water pressure around the pipe. Also, when used as a water collection pipe, it also acts in one direction, so it acts as a water collection pipe regardless of the water pressure inside and outside the pipe, and when it is used as a storage pipe, the water in the storage pipe is a check valve. With this arrangement, the water can be drained to the outside similarly to the drain pipe, but the water on the outer peripheral surface has an ideal effect that it cannot enter. In the case of a confluent sewer using this concrete pipe, sewage and rainwater are designed to flow into the same underdrain.
In this confluence type underdrain, rainwater and sewage flow when it rains, and only sewage flows when it is fine. The underdrain prevents water from infiltrating by collecting the water that has permeated underground when it rains and flowing it down to a treatment plant or a storage pipe, which is an ideal structure for the underdrain. Since the valve for preventing backflow used in the concrete pipe of the present invention is embedded in the wall of the concrete pipe and used in a situation where it is easily corroded in the ground, a material having good corrosion resistance, for example, vinyl chloride resin, polyester resin, etc. preferable. Further, the concrete pipe to be used is not limited to a simple cylindrical pipe, and it is needless to say that it is a large diameter pipe such as a box culvert or a shield segment which is generally used as an underdrain as shown in FIGS. 4 and 5. In the figure, a through hole in which a check valve is embedded is provided on the entire peripheral surface of the concrete pipe, but since the pipe itself is used by embedding it, sludge settling, water level, etc. must be considered. It is also conceivable that the pipe is installed up to about the upper half of the embedded pipe, that is, up to about the upper half of the embedded pipe in the longitudinal direction. Further, although the present invention describes a concrete pipe, a similar effect can be obtained even if it is a ceramic pipe.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The concrete pipe of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view of the concrete pipe (1-A) of the present invention, and FIG. 2 is a sectional view of the same. The concrete pipe (1-A) shown in the figure has a large number of through holes (2) formed in the pipe wall (1), and a check valve A is embedded in the through holes (2). FIG. 3 shows a detailed view of the portion X of FIG. 2, but this check valve is shown in FIG.
FIG. 7 will be described in detail. Figure 4 is a box culvert (1-B)
FIG. 5 is a perspective view of the shield segment (1-C).
2 is a perspective view of a large-diameter pipe according to FIG. 1, both of which are provided with a large number of through holes (2) in the pipe wall similarly to the concrete pipe of FIG. 1, and a check valve A is embedded in the through holes (2). Is.
6 and 7 are cross-sectional views in which the check valve A is embedded and embedded in the through hole (2) provided in the concrete pipe wall (1),
FIG. 6 shows the structure of an A-1 type check valve, and FIG. 7 shows the structure of an A-2 type check valve. In FIG. 6, the check valve A-1 embedded in the through hole (2) of the pipe wall (1) is the outer cylinder (1
The protrusion (12) for locking is provided inside the upper end of (0) and the sphere (11) is suspended in the outer cylinder (10) so as to be vertically movable. The check valve A-2 shown in FIG. 7 has an air spring (2) made of a rubber bag inside the outer cylinder (10).
0) is built in, and the sphere (11) is arranged on this so as to abut the projection (12) at the upper edge of the outer cylinder. The operation of the check valve A will be described. The bottom cap (13) of the valve A is detachably provided with a window hole for water passage. A filter (15) is attached to this window hole. Fig. 8 shows valve A
It is a bottom view of the filter and the structure of the filter is clear. Therefore, referring to FIG. 9, when the water pressure in the pipe is high, the sphere (11) always has the protrusion (1) at the upper end of the outer cylinder (10).
It is in close contact with 2) and the water in the pipe is not discharged outside the pipe. However, in the case of heavy rain or the like, when the water level on the outer circumference of the pipe A rises and the pressure rises, the spherical body (11) descends due to the water pressure and the water enters from the outside to be used as a water collecting pipe. Therefore, when the check valve A is used in the direction opposite to that shown in the drawing, the check valve A acts as a drain pipe because the water pressure in the pipe increases and the water is discharged from the pipe to the outer circumference. Also, this check valve (A-
Since 1) and (A-2) both have a filter (15) at the bottom, they do not enter or discharge sludge. Reference numeral (17) in the drawing is a rib provided on the side surface of the cylindrical body (10) to prevent the valve A from coming off. Even if the concrete pipe according to the present invention is used as the storage pipe, it is possible to prevent rainwater from flowing into the sewer due to a large amount of rainfall.

The concrete pipe of the present invention is a check valve A
It can be used as a drainage pipe or a water collection pipe depending on the direction of burial, and when it is used as a storage pipe, it has the effect of reducing the burden on the sewage treatment facility and being able to return rainwater to the underground.

[Brief description of drawings]

FIG. 1 is a side view of a concrete pipe (1-A) of the present invention.

FIG. 2 is a sectional view of the concrete pipe (1-A).

FIG. 3 is an enlarged detailed view of a portion of FIG. 2X.

FIG. 4 is a perspective view of a box culvert (1-B).

FIG. 5 is a perspective view of a large-diameter pipe with segments.

FIG. 6 is a sectional view of the check valve A-1.

FIG. 7 is a cross-sectional view of the check valve A-2.

FIG. 8 is a bottom view of the check valve.

[Fig. 9] Fig. 9 is an embodiment diagram showing the action.

[Explanation of symbols]

 (1-A) ... Concrete pipe (1-B) ... Box culvert (1-C) ... Large diameter pipe by segment (1) ... Pipe wall (2) ... Penetration hole A ... Backflow check valve (10) ... Cylinder Body (11) ... Sphere (12) ... Locking part (13) ... Cap (15) ... Filter (20) ... Air spring

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[Procedure amendment]

[Submission date] November 18, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

Title: Concrete pipe provided with a hole with check valve

Claims (3)

[Claims] 1. A concrete pipe wall is provided with a large number of through holes,
A rainwater storage pipe having a check valve embedded in the through hole. 2. A concrete pipe wall is provided with a large number of through holes,
A drainage pipe having a check valve embedded in the through hole. 3. A concrete pipe wall is provided with a large number of through holes,
A water collecting pipe having a check valve embedded in the through hole.