JP2000205457A - Longitudinal pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate an installing operation inside a manhole and easily form a difference of elevation sewer pipe line by using a pipe with spiral guide passage provided with the spiral guide passage inside a pipe body and a short pipe with discharge opening whose upper end has a connecting part for connecting a lower part of the pipe with spiral guide passage. SOLUTION: This longitudinal pipe 1 comprises a pipe 11 with spiral guide passage and a short pipe 12 with discharge opening. The pipe 11 with spiral guide passage comprises a pipe body 111 of a straight pipe shape made of resin and a spiral guide passage 112 made of resin and provided spirally on an inner peripheral surface of the pipe body 111. The spiral guide passage 112 is projected inwardly over 1/20 to 5/12 of an inner diameter of the pipe body 111 and the shaft center is hollow over a whole length. The short pipe 12 with discharge opening comprises a short pipe part 121 of a straight pipe shape made of resin and a delivery opening 122 integrally provided so as to project to an outside of a lower part of the short pipe part 121. A socket 121a to which a lower end of the pipe 11 with spiral guide passage is connected is provided to an upper end of the short pipe part 121, and a bottom part 121b which has the same level as an lower inner surface of the delivery opening 122 is provided to a lower end of the short pipe part 121.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height difference sewage pipe having a function of facilitating construction work to be installed inside a manhole and having a function of attenuating sewage flowing down the inside by guiding the sewage along a spiral guideway. The present invention relates to a vertical tube that can be easily formed.

[0002]

2. Description of the Related Art Conventionally, in order to prevent the inside of a manhole from being damaged by sewage that naturally flows down in the manhole, for example, as disclosed in Japanese Patent Application Laid-Open No. 8-41915, a vertical sewage line is provided in the manhole. A method of arranging tubes (drop shafts) has been implemented.

As shown in FIG. 4, a vertical pipe for sewage is formed in a straight tubular pipe body a having a constant inner diameter and a helical shape inside the pipe body a so that sewage does not flow down in a straight line. The sewage is attenuated by sewage flowing down spirally along the spiral guide path b. The sewage in the attenuated state flows into the manhole from a discharge port c provided at the lower end of the pipe main body a. Therefore, the sewage flowing into the manhole does not have a possibility of strongly colliding with the bottom of the manhole or the like, and the bottom of the manhole is prevented from being damaged.

[0004] Such a vertical pipe for sewage has a structure in which a discharge port c is integrally provided at a lower end of a pipe main body part a, and as shown in FIG. Had been done. At this time, in order to construct the pipe vertically so that the sewage discharged from the discharge port c provided at the lower end of the pipe main body a flows out smoothly from the outflow pipe f of the manhole d to the outside, the discharge port c is required. The mortar m is injected into the space between the lower end of the pipe body a and the lower end of the manhole d while the positional relationship between the pipe and the outflow pipe f is finely adjusted so that the vertical pipe for sewage is in a vertical state. It is necessary to perform finishing work to fix to However, when the vertical pipe for sewage is installed in the narrow manhole d, in the conventional structure, water is discharged from the outside of the vertical pipe for sewage and from the inside of the pipe main body a with the spiral guide path b removed. It is difficult to adjust the positional relationship between the outlet c and the outflow pipe f, and it is difficult to finish the mortar m.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and facilitates installation work in a manhole where a work space is not provided between the manhole and a lower end thereof. It is an object of the present invention to provide a vertical pipe capable of easily forming a vertical sewage pipe having a function of attenuating sewage flowing down the inside by guiding the sewage through a spiral guide path.

[0006]

The invention according to claim 1 of the present invention (Invention 1) is a pipe with a spiral guide path provided with a spiral guide path in a pipe main body, and a pipe with the spiral guide path. And a short pipe with a discharge port having a connecting part at the upper end to which the lower end is connected.

An invention according to a second aspect of the present invention (the second aspect of the present invention) is the vertical pipe according to the first aspect of the present invention, wherein the connection portion is a receiving port.

In the present invention, as a material for forming the pipe main body, the spiral guide path, and the short pipe with the discharge port, plastics including metals are used. Examples of the plastic include thermoplastic resins, including polyvinyl chloride, polyethylene, polypropylene, and methacrylic resins.Thermosetting resins include unsaturated polyester resins, vinyl ester resins, and epoxy resins. The resin can be used as reinforced with inorganic fibers such as glass fibers, carbon fibers, organic fibers such as aramid fibers and vinylon fibers.

The spiral guide path does not necessarily need to be provided over the entire length of the pipe main body, and may not be provided particularly at the middle portion of the pipe main body. The height of each spiral guide path is preferably about 1/20 to 5/12 of the diameter of the pipe main body. The wall thickness of the spiral guide path varies depending on the diameter, but is usually preferably about 1/20 to 15/100 of the inner diameter of the pipe main body. The spiral pitch of the spiral guide path is preferably about 1 to 10.

[0010]

According to the first aspect of the present invention, there is provided a vertical pipe having a spiral guideway provided in a pipe main body, and a spout having an upper end having a connection portion to which a lower end of the spiral guideway is connected. By installing a short pipe with an outlet, when installing in a manhole, first, a short pipe with a discharge port is inserted into the lower end of the manhole to match the positional relationship between the discharge port and the outflow pipe, and While adjusting the short pipe part to be vertical,
The mortar is easily poured and fixed between the short pipe with the discharge port and the lower end of the manhole, and then the lower end of the pipe with the spiral guide path is connected to the connection at the upper end of the short pipe with the discharge port. After inserting and connecting, mortar can be poured between the periphery of the connection between the pipe body and the short pipe and the lower end of the manhole to perform finishing work, so even in a narrow manhole. The height difference sewage pipe which can be attenuated by guiding the sewage flowing down inside the spiral guide path can be easily constructed.

In the vertical pipe according to the second aspect of the present invention, since the connection portion is a receiving port, the lower end of the vertical pipe is inserted into the receiving port at the upper end of the short pipe with the discharge port fixed to the lower end of the manhole. Since the connection can be made simply by performing the operation, the construction becomes easier.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an example of the vertical pipe of the present invention. As shown in FIG. 1, the vertical pipe 1 includes a pipe 11 with a spiral guideway and a short pipe 12 with a discharge port.

The pipe 11 with a spiral guide path is composed of a straight pipe body 111 made of resin and a pipe body 11 made of resin.
Spiral guideway 1 made of resin spirally provided on the inner peripheral surface of 1
It consists of 12. The spiral guide path 112 is connected to the pipe main body 111.
Is projected inward over about 1/20 to 5/12 of the inner diameter of the shaft, and the axial center is hollow throughout the entire length.

The short pipe 12 with a discharge port is formed of a straight short pipe section 121 made of resin, and a discharge port 1 provided integrally with the short pipe section 121 so as to protrude outward from a lower portion of the short pipe section 121.
22. The upper end of the short pipe portion 121 is provided with a receiving port 121a to which the lower end of the pipe 11 with a spiral guide path is connected. A discharge port 122 is provided at the lower end of the short pipe section 121.
A bottom 121b having a bottom surface at the same level as the lower inner surface is provided.

Next, a state in which the vertical pipe 1 shown in FIG. 1 is installed in a manhole will be described with reference to FIGS. In FIG. 2, reference numeral 2 denotes a manhole in which a vertical pipe 1 is installed, and an outflow pipe 3 for allowing internal sewage to flow to the outside is inserted through a lower end of the manhole so that an insertion end thereof protrudes into the manhole.

First, as shown in FIG. 2, only the short pipe 12 with a discharge port is inserted into the lower end of the manhole 2 so that the positional relationship between the discharge port 122 and the outflow pipe 3 is adjusted. The mortar 4 is poured between the short pipe 12 with the discharge port and the lower end of the manhole 2 and fixed so as to be in a vertical state. At this time, since the length of the short pipe portion 121 of the short pipe 12 with the discharge port is short, the above positional relationship can be easily adjusted. The mortar 4 can be poured from a wide space portion of the mortar, so that the mortar can be easily poured. The mortar may be poured in such a manner that the adjustment position of the short pipe 12 with a discharge port is fixed and the inside of the short pipe section 121 of the short pipe 12 with a discharge port is over the upper end thereof.

Next, as shown in FIG. 3, the short pipe portion 1 of the short pipe 12 having a discharge port fixed to the lower end of the manhole 2 is provided.
The pipe 11 with the spiral guide path is inserted into the receiving port 121a of the pipe 21 from above.
The mortar 5 is poured between the periphery of the connection between the pipe body 111 and the pipe end 121 and the lower end of the manhole to perform the finishing work. Then, the work of installing the vertical pipe 1 in the manhole 2 in the vertical state is completed.

[0018]

Since the vertical pipe of the present invention is constructed as described above, it is easy to perform a vertical installation in a manhole where no working space is required between the vertical pipe and the lower end of the manhole. The function of attenuating the sewage flowing down through the spiral guide path can be easily formed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a vertical pipe of the present invention.

FIG. 2 is a cross-sectional view illustrating a first half of a process of installing the vertical pipe shown in FIG. 1 in a manhole.

FIG. 3 is a cross-sectional view illustrating the latter half of the process of installing the vertical pipe shown in FIG. 1 in a manhole.

FIG. 4 is a sectional view showing an example of a conventional vertical pipe for sewage.

FIG. 5 is a cross-sectional view illustrating a state in which the vertical pipe for sewage shown in FIG. 4 is installed in a manhole.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical pipe 2 Manhole 3 Outflow pipe 11 Pipe with spiral guideway 12 Short pipe with discharge port 111 Tube main body 112 Spiral guideway 121 Short pipe section 122 Discharge port 121a Reception port

Claims (2)

[Claims] 1. A pipe with a spiral guide path in which a spiral guide path is provided in a pipe main body, and a short pipe with a discharge port having an upper end with a connection portion to which a lower end of the pipe with a spiral guide path is connected. A vertical pipe characterized by becoming. 2. The vertical pipe according to claim 1, wherein the connection part is a socket.