JP3285801B2 - Connection method between vertical pipe and existing pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertically disposed sewage flowing down a guideway provided inside the sewage when the sewage naturally flows down the inside thereof. The present invention relates to a method of connecting an attenuated natural vertical pipe to an existing pipe which is arranged horizontally so that sewage flows into the manhole when the pipe is installed in a manhole, for example.

[0002]

2. Description of the Related Art In order to attenuate sewage flowing into a manhole when flowing down the manhole, for example, as disclosed in Japanese Patent Application Laid-Open No. 8-41915, a vertical pipe for sewage (drop) is placed in a manhole. Shaft) is implemented. Inside the vertical pipe for sewage, there is provided a guide path that bends left and right so that the sewage does not flow down linearly. The sewage flows down along the guide path, so that the sewage is in an attenuated state. The sewage in the damped state is discharged laterally from the lower end of the vertical sewage pipe and discharged into the manhole. Therefore, at the bottom of the manhole, etc.
There is no danger of the sewage flowing down colliding strongly, and wear at the bottom of the manhole is suppressed.

A vertical pipe for sewage arranged vertically in a manhole is usually connected to an existing introduction pipe 41 arranged horizontally above a wall 31 of the manhole as shown in FIG. ing. In the upper part of the vertical pipe 10 for sewage,
The inflow port 11b connected to the existing introduction pipe 41 is provided so as to protrude horizontally to the side. The inlet 11b is
The end of the existing introduction pipe 41 protruding into the manhole is brought into contact with the end of the existing introduction pipe 41, and is connected to each other by a water stop band 35 in a coaxial water stop state.

[0004]

As described above, when the inflow port 11b of the vertical sewage pipe 10 and the existing introduction pipe 41 are connected by the waterproof band 35, the end of the existing introduction pipe 41 is It is necessary that the projecting portion protrudes into the manhole over at least half of the widthwise dimension of the waterproof band 35. Similarly, the inflow port 11b of the vertical pipe 10 needs to protrude over at least half of the width dimension of the waterproof band 35. Therefore, the vertical pipe 10 is disposed on the wall 31 through which the existing introduction pipe 41 passes. It must be arranged with an interval larger than the width dimension of the water stop band 35.

However, some manholes do not have a structure that satisfies such conditions. In such a case, the inflow port 11b of the vertical pipe 10 is not provided.
There is a possibility that the existing introduction pipe 41 and the existing introduction pipe 41 cannot be connected by the water stop band 35.

The present invention has been made to solve such a problem, and an object of the present invention is to connect a vertical pipe to an existing pipe without depending on the shape of a manhole or the like in which the vertical pipe is installed. It is to provide a method.

[0007]

According to a method of connecting a vertical pipe to an existing pipe according to the present invention, an inflow port which projects horizontally and is provided at an upper portion so as to be connected to an existing pipe arranged horizontally. When connecting a vertical pipe provided inside with a guide passage adapted to attenuate and flow down a fluid flowing into the inside from the inflow port to the existing pipe, the end of the existing pipe is provided. A cylindrical receiving member is arranged in the portion, and an inlet of a vertical pipe is inserted into the receiving member.

The receiving member is disposed in a recess formed by cutting the inner peripheral surface of the end of the existing pipe.

A rubber ring is fitted on the inner peripheral surface of the receiving member.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an example of an embodiment of a vertical pipe connected by the connection method of the present invention. The vertical pipe 10 for sewage disposed in the manhole 30 is configured such that an inflow pipe 11, a damping pipe 12, a connecting pipe 13 and an outflow pipe 14 are sequentially joined in the vertical direction from the upper side.

The inflow pipe 11 arranged at the uppermost part of the vertical pipe 10 for sewage is provided so as to protrude horizontally from the upper part of the inflow pipe main part 11a in a straight cylindrical shape. And a cylindrical inlet 11b. The inflow port 11b is connected to an existing introduction pipe 41 that horizontally penetrates the upper part of the wall surface 31 of the manhole 30, and the sewage flowing in the existing introduction pipe 41 passes through the inflow port 11b and flows into the inflow pipe main body 11a. It is designed to flow into.

An attenuation pipe 12 provided below the inflow pipe 11
Is a straight cylindrical damping tube main body 12a and a hollow shaft 12b arranged along an axis in the damping tube main body 12a.
And a spiral guide path 12c spirally provided between the outer peripheral surface of the hollow shaft 12b and the inner peripheral surface of the damping tube main body 12a. The spiral guide path 12c is connected to the attenuation pipe main body 12
It is provided over the entire length in a.

The damping pipe main body 12a is concentrically joined to the inflow pipe 11 below the inflow pipe main body 11a. The hollow shaft 12b penetrates the entire length of the attenuation pipe main body 12a, protrudes upward from the upper end surface of the attenuation pipe main body 12a, and has a shaft center of the inflow pipe main body 11a of the inflow pipe 11 arranged on the upper side. Part is inserted. Inflow pipe body 1
A hollow shaft 12b passing through the shaft center portion 1a has an inflow pipe 11
A guide plate 12d is provided so as to face the inflow port 11b. The sewage flowing from the existing introduction pipe 41 is guided by the guide plate 12 d and flows down into the attenuation pipe 12.

A connecting pipe 13 provided below the attenuation pipe 12
Is formed in a straight cylindrical shape, and is concentrically joined to the lower side of the attenuation pipe main body 12a in the attenuation pipe 12.

Outflow pipe 14 arranged below connecting pipe 13
Is a straight cylindrical outflow pipe main body 14a, and a spiral guide path 14 spirally provided on the inner peripheral surface of the outflow pipe main body 14a.
b. The spiral guide path 14b is provided except for the lower end of the outflow pipe main body 14a, and its axial center is hollow. At the lower end of the outflow pipe body 14a,
A discharge port 14c that protrudes horizontally is provided on the side. The outflow pipe main body 14a is joined concentrically with the upper connection pipe 13. The discharge port 14c is connected to the upper inflow pipe 1
1 are arranged so as to protrude in a direction opposite to the inflow port 11b provided in the first port.

The inflow pipe main body 11a, the attenuation pipe main body 12a, the connecting pipe main body 13a, and the outflow pipe main body 14a of the vertical sewage pipe 10 having such a structure are made of, for example, PVC.
(Polyvinyl chloride) has a diameter of 450 mm, and the inflow port 11b provided at the upper portion also has a diameter of 400 mm made of PVC. The inflow port 11b is connected to an existing introduction pipe 41 that penetrates the wall surface 31 of the manhole 30. Vertical pipe for sewage 10
The existing inlet pipe 41 to which the inflow port 11b is connected has a diameter of 400 mm, for example, formed by a fume pipe, and the inner peripheral surface of the end is cut to a constant depth over the entire circumference to form a concave portion 41a. Have been. Then, in the recess 41a formed by the cutting, a diameter of 400 mm
The cylindrical receiving member 42 made of PVC is fitted with a putty 44 for stopping water. This receiving member 42
A rubber ring 43 is fitted to the inner peripheral surface of the. The inflow port 11b of the vertical sewage pipe 10 has a lubricant applied to the outer peripheral surface and is inserted into a receiving member 42 provided on the inner peripheral surface at the end of the existing introduction pipe 41. The inflow port 11 b inserted into the receiving member 42 is inserted into a rubber ring 43 provided in the receiving member 42 and is stably supported by the rubber ring 43.

When connecting the inflow port 11b provided at the upper part of the vertical sewage pipe 10 to the end of an existing introduction pipe 41 which passes horizontally through the wall surface 31 of the manhole 30, first, FIG.
As shown in (a), the end inner peripheral surface of the existing introduction pipe 41 is
An appropriate length is cut from the end face located on the inner side of the manhole 30, and the concave portion 4 having a constant depth over the entire circumference.
1a is formed.

Next, as shown in FIG.
With the putty 44 applied in the inside 1a, the cylindrical receiving member 42 is fitted. A rubber ring 43 is supported on the inner peripheral surface of the receiving member 42 in a fitted state. When the receiving member 42 is fitted into the recess 41a of the existing introduction pipe 41 via the putty 44, the vertical pipe 10 for sewage is vertically arranged in the manhole 30 as shown in FIG. Thus, a lubricant 15 is applied to the outer peripheral surface of the inflow port 11b of the inflow pipe 11 provided above the vertical pipe 10 for sewage. The inflow port 11b is concentrically opposed to the existing introduction pipe 41 provided on the wall surface 31 of the manhole 30.

Thereafter, a hydraulic jack 51 is provided between the wall surface 32 of the manhole 30 facing the wall surface 31 through which the existing introduction pipe 41 penetrates and the vertical pipe 10 for sewage. The vertical jack 10 for sewage is provided by the hydraulic jack 51. , Existing introduction pipe 4
1 is moved so as to approach the wall surface 31 provided with the same.
The vertical wall 10 for sewage is provided on the wall surface 31 on which the existing introduction pipe 41 is provided.
When it is moved so as to approach, the inflow port 11b provided at the upper part of the vertical pipe 10 for sewage is pushed into the receiving member 42 fitted to the end of the existing introduction pipe 41 penetrating the wall surface 31. The inlet 11 b is inserted into a rubber ring 43 provided in the receiving member 42. Thereby, the inflow port 11b of the vertical sewage pipe 10 is stably supported by the rubber ring 43 in the existing introduction pipe 41, and is reliably connected to the existing introduction pipe 41.

3 (a) to 3 (c) are cross-sectional views showing steps of another example of the embodiment of the connection method of the present invention. In this example, the inflow pipe main part 11a, the attenuation pipe main part 12a, and the connecting pipe main part 13a in the vertical pipe 10 for sewage are provided.
The outflow pipe main body 14a has a diameter of 700 mm made of, for example, FRPM (fiber reinforced resin mortar), and the inflow port 11b provided at the upper portion also has
Has a diameter of 600 mm. And
The existing introduction pipe 41 to which the inflow port 11b is connected is configured to have a diameter of 600 mm by a fume pipe.

As shown in FIG. 3A, the existing introduction pipe 41
When the inner peripheral surface of the end is cut to form the concave portion 41a,
As shown in FIG.
The receiving member 42 of the concave portion 41a to which the putty 44 is applied
Is inserted into. The receiving member 42 is provided with a cylindrical rubber ring 43 inside. Then, as shown in FIG. 3C, the vertical sewage pipe 10 vertically arranged in the manhole 30 is moved by the hydraulic jack 51 so as to approach the wall surface 31 through which the existing introduction pipe 41 penetrates. ,
The inflow port 11b provided in the upper part of the vertical pipe 10 for sewage is pushed into the receiving member 42 fitted to the end of the existing introduction pipe 41, and the inflow port 11b is provided in the rubber provided in the receiving member 42. It is inserted into the ring 43. Thereby, the inflow port 11b of the vertical sewage pipe 10 is stably supported by the rubber ring 43 in the existing introduction pipe 41, and is reliably connected to the existing introduction pipe 41.

[0023]

The method for connecting a vertical pipe and an existing pipe according to the present invention is as follows.
As described above, the receiving member is provided on the inner peripheral surface of the end of the existing pipe, and the inlet of the vertical pipe is inserted into the receiving member. Regardless of the shape, the vertical pipe can be reliably connected to the existing pipe.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of a state in which a vertical pipe and an existing pipe are connected by a connection method according to the present invention.

FIGS. 2A to 2C are longitudinal sectional views of manholes, respectively, showing an example of an embodiment of a connection method according to the present invention.

3 (a) to 3 (c) are longitudinal sectional views of a manhole, respectively, showing another example of the steps of implementing the connection method of the present invention.

FIG. 4 is a longitudinal sectional view of a manhole showing an example of a connection state between a conventional vertical pipe for sewage and an existing pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vertical pipe for sewage 11 Inflow pipe 11a Inflow pipe main part 11b Inflow port 12 Attenuation pipe 12a Attenuation pipe main part 12b Hollow shaft 12c Spiral guideway 13 Connecting pipe 14 Outflow pipe 14a Outflow pipe main part 14b Spiral guideway 14c Discharge port 15 Lubricant 30 Manhole 31 Wall surface 32 Wall surface 41 Existing introduction pipe 41a Recess 42 Reception member 43 Rubber ring 44 Putty

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 29/12

Claims (3)

(57) [Claims] 1. An inflow port protruding horizontally horizontally is provided at an upper portion so as to be connected to an existing pipe arranged horizontally, and a fluid flowing into the inside from the inflow port is attenuated. When connecting a vertical pipe provided with a guide passage adapted to flow down to the existing pipe, a cylindrical receiving member is arranged in the end of the existing pipe, and in the receiving member, A method for connecting a vertical pipe to an existing pipe, wherein the inlet of the vertical pipe is inserted. 2. The receiving member is disposed in a recess formed by cutting an inner peripheral surface of an end of an existing pipe.
Connection method between the vertical pipe and the existing pipe described in 4. 3. The method of connecting a vertical pipe to an existing pipe according to claim 1, wherein a rubber ring is fitted on an inner peripheral surface of the socket member.