JP4082527B2 - Tube with internal spiral guideway - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe with an inner surface spiral guide path suitable for use in a vertically flowing vertical sewer pipe.
[0002]
[Prior art]
Conventionally, for example, as described in Japanese Utility Model Publication No. 4-53842, the upper end of a vertical pipe is connected to one end of an inflow pipe protruding from the side wall of the manhole into the manhole via a bent pipe. It is known that the lower end is installed at the bottom of the manhole, and the sewage introduced into the manhole by the inflow pipe is introduced into the bottom of the manhole by the vertical pipe.
[0003]
However, when the vertical pipe provided in the manhole is long as described above, there is a possibility that the bottom of the manhole may be damaged due to a large drop impact of the sewage flowing out from the lower end of the vertical pipe.
[0004]
Therefore, for example, as described in JP-A-8-41915 and as shown in FIG. 8, for a sewer system provided with a bent flow channel formed in a spiral shape from the upper end to the lower end along the inner surface of the vertical tube main body a. A vertical tube e has been proposed.
A cruciform joint b is connected to the upper end of the sewer vertical pipe e, and one end of the inflow pipe d introduced into the manhole c is connected via the cruciform joint b. It is introduced into the vertical sewer pipe e via b.
[0005]
However, when an inflow pipe d having an outer diameter larger than the outer diameter of the vertical pipe main body a is connected, either the sewer vertical pipe e or the inflow pipe d is introduced into the manhole c first. However, since there is no space for exchange, there is a problem that it is difficult to connect the vertical sewer pipe e and the inflow pipe d through the cross-shaped joint b.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to solve such a conventional problem and to provide a tube with an internal spiral guideway that can be easily connected to an inflow tube having an outer diameter larger than the outer diameter of a vertical tube in a narrow manhole. It was made as.
[0007]
[Means for Solving the Problems]
The present invention provides an inflow for connecting an inflow pipe having an outer diameter larger than the outer diameter of the vertical pipe to the upper part of the vertical pipe provided with an air core cylinder and a spiral guide path in a straight pipe vertical pipe main body. A pipe connecting member is provided, and the inflow pipe connecting member is connected to the upper opening of the vertical pipe and the opening connected to the upper end of the connecting pipe and communicating with the hollow portion of the connecting pipe It is a pipe | tube with an internal spiral guideway which consists of a bowl-shaped part which has.
[0008]
In the present invention, examples of the material for forming the spiral guide path include metals and plastics.
Examples of plastics include thermoplastic resins such as polyvinyl chloride, polyethylene, polypropylene, and methacrylic resins. Thermosetting resins include unsaturated polyester resins, vinyl ester resins, and epoxy resins. Can be used as those reinforced with organic fibers such as inorganic fibers such as carbon fibers, aramid fibers, and vinylon fibers.
[0009]
The height of each path of the spiral guide path is preferably about 1/20 to 5/12 of the diameter of the vertical pipe. Although the thickness of the spiral guide path varies depending on the diameter, it is usually preferably about 1/20 to 15/100 of the inner diameter of the vertical pipe.
The spiral pitch of the spiral guide path is preferably about 1 to 10.
[0010]
In the present invention, examples of the material forming the vertical pipe include the same materials as the material forming the spiral guide path.
[0011]
[Action]
The pipe with the inner surface spiral guide path of the present invention is an inflow having an outer diameter larger than the outer diameter of the vertical pipe at the upper part of the vertical pipe provided with the air core cylinder and the spiral guide path in the straight pipe vertical pipe main body. An inflow pipe connecting member for connecting the pipe is provided, and the inflow pipe connecting member is connected to a connection pipe portion connected to the upper opening of the vertical pipe and an upper end of the connection pipe portion, A vertical pipe is erected in the manhole by an eaves portion having an opening communicating with the hollow portion, and an inflow pipe connection member is mounted on the upper part of the vertical pipe, and the inflow pipe connection member and the inflow Since the pipes can be connected via the auxiliary cylindrical body, the inflow pipe can be easily connected to the upper part of the vertical pipe installed in the narrow manhole via the inflow pipe connecting member and the auxiliary cylindrical body. it can.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing an example of a tube with an inner spiral guide path of the present invention. The
As shown in FIG. 1, the pipe 1 with the inner spiral guide path includes a vertical pipe 11 and an inflow pipe connecting member 12.
[0013]
The vertical tube 11 includes a vertical tube main body 111, an air core tube 113, and spiral guide paths 112 and 112 '.
A receiving port 114 is provided at the upper end of the vertical tube main body 111.
At the upper part in the vertical tube main body 111, an air core cylinder 113 having a hollow inside is erected substantially at the center.
[0014]
A first spiral guide path 112 is disposed between the inner peripheral surface of the vertical tube main body 111 and the outer peripheral surface of the air core cylinder 113. The inner peripheral surface of the spiral guide path 112 is bonded to the outer peripheral surface of the air core tube 113. The outer peripheral surface of the spiral guide path 112 is bonded to the inner peripheral surface of the vertical tube main body 111.
[0015]
An outflow pipe 115 is connected to the lower end of the vertical pipe main body 111, and a second spiral guide path 112 ′ is disposed inside the vertical pipe main body 111 slightly above the top of the outflow pipe 115. Has been.
The outer peripheral surface of the second spiral guide path 12 ′ is bonded to the inner peripheral surface of the vertical tube main body 111. No air core cylinder is attached to the second spiral guide path 12 '.
No spiral guide path is provided between the first spiral guide path 112 and the second spiral guide path 112 ′ inside the vertical tube main body 111.
[0016]
The inflow pipe connecting member 12 is for connecting an inflow pipe having an outer diameter larger than the outer diameter of the vertical pipe to the upper part of the vertical pipe, and is connected to the receiving port 114 at the upper end of the vertical pipe 111. It consists of a pipe part 121 and a hook-like part 122 having an opening connected to the upper end of the connection pipe part 121 and communicating with the hollow part of the connection pipe part 121.
[0017]
Hereinafter, the use state of the pipe 1 with the inner surface spiral guide path shown in FIG. 1 will be described with reference to FIGS.
In FIG. 2, 3 is a manhole, in which an inflow pipe 2 having an outer diameter larger than the outer diameter of the vertical pipe 111 of the pipe 1 with the inner surface spiral guide path is introduced at the upper part, and an outlet 31 is provided at the lower part. ing. A plurality of (three in the drawing) support plates 32 are provided in the manhole 3, and each support plate 32 is provided with a hole 321 through which the vertical tube main body 111 of the vertical tube 11 is inserted. .
[0018]
First, as shown in FIGS. 2 and 3, the vertical tube 11 of the tube 1 with the inner surface spiral guide path shown in FIG. 1 is placed in the manhole 3 in each hole 321 of the three support plates 32. The main body 111 is inserted, and the receiving port 114 is protruded from the hole 321 of the uppermost support plate 32 so as to stand upright.
[0019]
Next, as shown in FIG. 4, the inflow pipe connecting member 12 is connected to the receiving port 114 of the vertical pipe 11, and the pipe connecting portion 121 is connected and the two are bonded to each other so as to be held at a desired height. And fix.
[0020]
Further, as shown in FIG. 5, the inflow pipe 2 and the inflow pipe connecting member 12 are connected via the auxiliary cylindrical body 4.
The auxiliary cylindrical body 4 has one end opened and the other end covered, and has an opening in the lower part corresponding to the opening of the flanged part 122 of the inflow pipe connecting member 12, and the inspection port 41 in the upper part. It consists of what has.
[0021]
One end of the auxiliary tubular body 4 is bonded to the end portion of the inflow pipe 2 introduced into the manhole 3 and is placed on the flange portion 122 of the inflow pipe connection member 12 so that the openings communicate with each other. Adhere between both sides around the opening.
[0022]
Finally, as shown in FIG. 6, a lid 5 is attached to the inspection port 41 of the auxiliary tubular body 4, and as shown in FIG. 7, the inflow pipe is connected to the upper part of the vertical pipe 11 installed in the manhole 3. The inflow pipe 2 is connected via the member 12 and the auxiliary cylindrical body 4.
[0023]
The sewage M entering the manhole 3 from the inflow pipe 2 flows into the vertical pipe main body 11 through the auxiliary cylindrical body 4 and the inflow pipe connecting member 12, and spirals along the first spiral guide path 112. After flowing down, the spiral is maintained and flows down along the second spiral guide path 112 '. The sewage is attenuated while flowing down spirally, and therefore, there is no risk of strong impact on the bottom of the manhole 3 due to the flowing down sewage, and the sewage is discharged from the outflow pipe 115 through the outlet 31 of the manhole 3 to the underdrain pipe. Is done.
[0024]
【Example】
Hereinafter, the present invention will be described with reference to examples.
Example The vertical tube 11 is made of rigid polyvinyl chloride, and a receiving port having a thickness of 6 mm and an inner diameter of 362 mm is integrally provided at the upper end of the vertical tube main body 111 having a thickness of 6 mm and an inner diameter of 350 mm. The upper portion of the vertical pipe body 111 is made of hard polyvinyl chloride, and the upper spiral guide path 12 having a thickness of 8 mm, an outer diameter of 350 mm, and an inner diameter of 110 mm is arranged in three pitches, and the lower portion is made of hard polyvinyl chloride. A lower spiral guide path 12 ′ having a thickness of 8 mm and an outer diameter of 350 mm provided with 6 pitches was used.
[0025]
The inflow pipe connecting member 12 is made of hard polyvinyl chloride, and has a 6 mm thick bowl-shaped part having an opening communicating with the hollow part of the connecting pipe part at the upper end of the connecting pipe part 121 having a thickness of 6 mm and an outer diameter of 362 mm. What connected 122 was used.
[0026]
In the same manner as described with reference to FIGS. 2 to 6, in the manhole 3, the inflow pipe 2 made of fiber reinforced resin mortar, having a wall thickness of 10 mm and an inner diameter of 500 mm, and the vertical installed in the manhole 3 The upper portions of the pipes 11 were connected via the inflow pipe connecting member 12 and the auxiliary cylindrical body 4. The construction time required at this time was 3 hours.
[0027]
Comparative example As shown in Fig. 8, a sewer vertical pipe e and an inflow pipe d were connected using a cross-shaped joint b in a manhole. At this time, it was necessary to connect the sewer vertical pipe e and the inflow pipe d while tilting the sewer vertical pipe e, and it was difficult to exchange each member, which required 5 hours for the construction.
[0028]
【The invention's effect】
Since the pipe with the inner spiral guide path of the present invention is configured as described above, it is easy to connect to an inflow pipe having an outer diameter larger than the outer diameter of the vertical pipe in a narrow manhole.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a tube with an internal spiral guideway of the present invention.
FIG. 2 is a cross-sectional view showing a state in which a vertical pipe of a pipe with an inner spiral guide path of the present invention is installed in a manhole.
3 is a perspective view showing a main part of FIG. 3. FIG.
FIG. 4 is a perspective view for explaining a state where an inflow pipe connecting member is connected to an upper part of a vertical pipe.
FIG. 5 is a perspective view illustrating a state in which an inflow pipe and an inflow pipe connecting member are connected via an auxiliary cylindrical body.
FIG. 6 is a perspective view illustrating a state where a lid is attached to the inspection port of the auxiliary cylindrical body.
FIG. 7 is a cross-sectional view illustrating a state in which an inflow pipe is connected to an upper part of a vertical pipe installed in a manhole via an inflow pipe connecting member and an auxiliary cylindrical body.
FIG. 8 is a cross-sectional view showing an example of a conventional sewer vertical pipe.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pipe | tube with inner surface spiral guide way 2 Inflow pipe 3 Manhole 4 Auxiliary cylindrical body 5 Lid 11 Vertical pipe 12 Inflow pipe connection member 31 Outlet 111 Vertical pipe 112,112 'Spiral guide path 113 Air core cylinder 114 Receptacle 115 Outflow pipe

Claims (1)

An inflow pipe connecting member for connecting an inflow pipe having an outer diameter larger than the outer diameter of the vertical pipe to the upper part of the vertical pipe in which the air core cylinder and the spiral guide path are provided in the straight pipe main body portion. The inflow pipe connecting member is provided with a connecting pipe part connected to the upper opening of the vertical pipe, and a bowl-like shape having an opening connected to the upper end of the connecting pipe part and communicating with the hollow part of the connecting pipe part And consists of
The inflow pipe and the inflow pipe connecting member are connected via an auxiliary cylindrical body, and the auxiliary cylindrical body is open at one end and covered with the other end. Having an opening in the lower part corresponding to the opening,
With connecting one end of the auxiliary tubular body at an end portion of the inlet pipe, on the gutter-shaped portion of the inlet pipe connecting member, the inner surface helical characterized that you have been connected to communicate with the opening portions of each other Pipe with guideway.

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