JPH11182746A - Pipe with inside surface spiral guide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform inspection/repair by opening an inspection hole in the middle of a vertical pipe main body, and freely opening/closing this inspection hole by a blocking-up member in a pipe with inside surface spiral guide having the spiral guide to flow down water in a spiral shape in the vertical pipe main body. SOLUTION: A first spiral guide 12 is arranged in an L1 section of a vertical pipe main body 11 suitably used as a naturally flowing-down type vertical sewage work pipeline. The spiral guide 12 is supported in the vertical pipe main body 11 by bringing an elastic body adhered to the outer peripheral edge of the spiral guide passage 12 into pressure contact with the inner peripheral surface of the vertical pipe main body 11 after integrally installing the inner peripheral surface of this spiral guide 12 on the outer peripheral surface of an air core cylinder 13. While, a second spiral guide 12' is arranged in a slightly upper L3 section of the pipe top of an outflow pipe 15 connected to the lower end of the vertical pipe main body 11. A blocking-up member composed of a branch pipe forming member 20 and the cover part 30 is attached to open/ close an inspection hole 112 opening in a pipe wall of the spiral guide unarranged part between the first/second spiral guides 12 and 12'.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe with an internal spiral guideway suitable for use in a vertical sewer pipe of a natural flow type.

[0002]

2. Description of the Related Art Conventionally, as described in, for example, Japanese Utility Model Laid-Open Publication No. 4-53842, the upper end of a vertical pipe is connected to one end of an inflow pipe protruding into a manhole from a side wall of the manhole via a bent pipe. It is known that the lower end of the vertical pipe is installed at the bottom in the manhole, and the sewage flowing into the manhole by the inflow pipe is introduced into the bottom of the manhole by the vertical pipe.

However, when the vertical pipe provided in the manhole is long as described above, the bottom of the manhole may be damaged due to a large impact of sewage flowing out from the lower end of the vertical pipe.

Therefore, for example, as described in Japanese Patent Application Laid-Open No. 8-41915, as shown in FIG. 11, there is provided a bent downflow path spirally formed from the upper end to the lower end along the inner surface of the vertical pipe main body a. Vertical pipes for sewage have been proposed.

[0005] A cross-shaped joint b is connected to the upper end of the vertical pipe for sewerage, and one end of an inflow pipe d introduced into the manhole c is connected through the cross-shaped joint. It is designed to be introduced into the vertical pipe for sewerage via the cross joint b. The cruciform joint b is provided with an inspection port e on the upper side and an inspection port f on the side, and the inspection ports e and f are closed by a lid g.

However, in this sewer-like vertical pipe, since the cylindrical portion of the inspection hole f of the cruciform joint b exists on the extension of the inflow pipe d, sewage in the sewage flowing from the inflow pipe d into that portion. Is easily deposited. In addition, when performing maintenance inside the vertical pipe for sewage passages, first, a method of inserting a small camera from the inspection holes e and f with the lid g removed and inspecting the same is adopted. For this reason, there is a problem that the front of the lens becomes wet and a sufficient inspection cannot be performed. In addition, the inspection holes e and f provided above or to the side of the cruciform joint b are located away from the position where the clogging or abrasion is likely to occur in the middle of the vertical pipe main body. There is also a problem that inspection and repair cannot be performed sufficiently.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem and to provide a pipe with an internal spiral guideway which can easily perform inspection and repair. is there.

[0008]

The invention according to claim 1 of the present application (invention 1) has an inner spiral guide path provided with a spiral guide path for allowing water to spirally flow down in a vertical pipe main body. A pipe having an inner spiral guideway, wherein an inspection hole is opened in the middle of the vertical pipe main body, and the inspection hole is openable and closable by a closing member.

The invention described in claim 2 of the present application (Invention 2)
Is a pipe with an internal spiral guide path according to the first aspect of the present invention, wherein the closing member of the inspection hole is composed of a branch pipe forming member having a saddle part and a branch pipe part, and a lid part closing the branch pipe part.

The invention described in claim 3 of the present application (the present invention 3)
Is a pipe with an internal spiral guideway according to the second aspect of the present invention, wherein the branch pipe section of the branch branch pipe forming member is provided upward.

The invention described in claim 4 of the present application (Invention 4)
Is a pipe with an internal spiral guide path in which an inflow pipe is connected to the upper part of the vertical pipe body from the lateral direction, and a spiral guide path for spirally flowing down water from the inflow pipe is provided in the vertical pipe body. hand,
An inspection hole is opened in a pipe wall portion on an extension of the inflow pipe of the vertical pipe main body, and a lid portion for closing the inspection hole is provided, and an inner surface of the lid portion is substantially the same arc as an inner surface of the vertical pipe main body. It is a tube with an internal spiral guideway that is a surface.

The invention according to claim 5 of the present application (the present invention 5)
Is a pipe with an internal spiral guideway according to the fourth aspect of the present invention, wherein a screen is provided in the middle of the inflow pipe or on the inner surface of the lid.

In the present invention, the material of the vertical pipe main body is preferably reinforced plastic mortar (hereinafter referred to as FRPM) from the viewpoint of strength, rigidity and the like. The material of the spiral guide path is preferably reinforced plastic (FRP) or the like from the viewpoints of strength, workability, and the like. The material of the inflow pipe and the outflow pipe is preferably FRP from the viewpoints of strength, workability and the like, but general-purpose plastic may be used.

In the present invention, examples of the material forming the spiral guide path include metals and plastics. Examples of plastics include thermoplastic resins such as polyvinyl chloride, polyethylene, polypropylene, and methacrylic resins, and examples of thermosetting resins include unsaturated polyester resins, vinyl ester resins, and epoxy resins. And reinforced with organic fibers such as inorganic fibers, carbon fibers, aramid fibers, and vinylon fibers.

[0015] The height of each spiral guide path is one of the diameter of the vertical pipe.
/ 20 to 5/12 is preferred. The wall thickness of the spiral guide path varies depending on the diameter, but is usually 1 / the inner diameter of the vertical pipe.
About 20 to 15/100 is preferable. The spiral pitch of the spiral guide path is preferably about 1 to 10.

In the present invention, the position of the inspection hole which is opened in the middle of the vertical pipe main body is preferably a position where clogging or wear is likely to occur, where inspection and repair are easy. And between the lower spiral guideway and the like.

The diameter of the inspection hole depends on the diameter of the main body of the vertical pipe, but it is desirable that the diameter of the inspection hole is large enough to accommodate a camera, a hand, a high-pressure jet, and the like.
mm is preferred.

In the present invention, a branch branch pipe (saddle) having a saddle section and a branch section is used as a branch branch pipe forming member. A flange is provided at the tip of the branch section, and a lid is removed from the flange. It can be freely mounted, is practical, and is preferably used.

In the present invention, the lid is preferably made of a transparent material so that the state of flow of the fluid flowing down the vertical pipe main body can be confirmed, and polyvinyl chloride, acrylic resin, polycarbonate and the like are suitably used. .

[0020]

The pipe with the inner spiral guide path of the present invention 1 is usually inspected by the closing member because the inspection hole is opened in the middle of the vertical pipe main body and the inspection hole is openable and closable by the closing member. With the hole closed, a fluid such as sewage is allowed to flow down the pipe with the internal spiral guideway, and only when inspection and repair is necessary, the blocking member is opened to prevent clogging that is opened in the middle of the vertical pipe main body. The inspection hole near the part where the wear is likely to be opened is opened and the inspection hole can be used for inspection visually or with a camera. It can be done easily.

When the closing member comprises a branch branch pipe forming member having a saddle part and a branch pipe part, and a lid part closing the branch pipe part,
Since the saddle portion of the branch branch pipe forming member is joined to the outer peripheral surface of the peripheral wall of the inspection hole of the downspout main body, and the branch tube portion only needs to be covered, a mechanism for opening and closing the inspection hole can be easily provided.

When the branch pipe portion of the branch branch pipe forming member is provided upward, it is possible to prevent the backflow of the fluid in the vertical pipe when the lid is opened.

In the pipe with an inner spiral guide path according to the fourth aspect of the present invention, an inspection hole is opened in a pipe wall portion of the vertical pipe main body on an extension of the inflow pipe, and a lid portion for closing the inspection hole is provided. The inner surface of the portion is formed as an arc surface substantially the same as the inner surface of the vertical pipe main body, so that during normal use, the inspection hole is closed by a lid that is substantially flush with the vertical pipe main body. Since fluid such as sewage can flow down the pipe with the internal spiral guideway,
Open the lid only when it is difficult for sewage inflow from the inflow pipe to accumulate on the upper part of the vertical pipe main body, and when inspection and repair such as clogging of long objects is required. Longer objects and dirt related thereto can be removed, so that clogging of the upper portion of the vertical pipe main body can be easily repaired.

If a screen is provided in the middle of the inflow pipe or on the inner peripheral surface of the lid, it is possible to prevent driftwood and large stones from flowing into the vertical pipe main body.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. An example of a tube with an internal spiral guideway of the present invention will be described with reference to FIGS. In FIG. 1, reference numeral 10 denotes a vertical pipe, which includes a vertical pipe main body 11 and an air core tube 1.
3 and spiral guide paths 12, 12 '.

At the upper end of the vertical pipe main body 11, there is provided a receiving port 111 for connection pipe connection. An air core tube 13 made of FRP and having a hollow inside is provided upright at an upper portion in the vertical pipe main body 11 at a substantially central portion.

A first spiral guide path 12 made of FRP is provided between the inner peripheral surface of the vertical pipe main body 11 and the outer peripheral surface of the air core tube 13 (section L1 in FIG. 1). The inner peripheral surface of the spiral guide path 12 is integrally attached to the outer peripheral surface of the air core tube 13.

As shown in FIG. 2, a belt-like elastic body 14 made of rubber, for example, is integrally adhered to the outer peripheral edge of the spiral guide path 12 over its entire length with an adhesive. The elastic body 14 supports the spiral guide path 12 in the vertical pipe main body 11 by being pressed against the inner peripheral surface of the vertical pipe main body 11.

An outflow pipe 15 is connected to the lower end of the vertical pipe main body 11, and the inside of the vertical pipe main body 11 slightly above the top of the outflow pipe 15 (section L3 in FIG. 1) is made of FRP. A second spiral guideway 12 'is provided.

An elastic body similar to the above is integrally bonded to the outer peripheral edge of the second spiral guide path 12 'with an adhesive. The second spiral guide path 12 ′ is not attached to the air core tube 13. No spiral guide path is provided between the first spiral guide path 12 and the second spiral guide path 12 '(the section L2 in FIG. 1) inside the vertical pipe main body 11.

As described above, the first spiral guide path 12 and the second spiral guide path 12
The first spiral guide path 12 and the second spiral guide path 12 'are provided at appropriate intervals.
Of the vertical pipe body 1 by appropriately selecting the spiral pitch of
The length of the vertical pipe body 1 depends on the length of the
Although it is preferable because the speed of the sewage flowing down spirally in the inside 1 can be appropriately adjusted, the first spiral guide path 12 may be arranged to the lower end of the vertical pipe main body 11 at all.

An inspection hole 1 is formed in the pipe wall of the portion of the vertical pipe main body 11 where the spiral guide path is not provided (section L2 in FIG. 1).
12 is open.

For opening and closing the inspection hole 112, a closing member composed of a branch / branch forming member 20 and a lid 30 as shown in FIG. 3 is used. The branch pipe forming member 20 includes a branch pipe 21.
At one end, a saddle portion 22 communicating with the hollow portion of the branch pipe portion 21 is provided so as to be orthogonal to the tube axis, and a flange portion 23 is provided at the other end. The lid portion 30 is fixed to the flange portion 23 with bolts, and the hollow portion of the branch pipe portion 21 is closed.

As shown in FIG. 4, the saddle portion 22 of the branch / branch forming member 20 is joined to the outer peripheral surface of the peripheral wall of the inspection hole, and the inspection hole is formed on the lid 3 fixed to the flange portion 23 of the branch tube portion 21.
0 indicates a closed state. At the time of inspection and repair, the inspection hole can be opened by removing the lid portion 30.

In the example shown in FIGS. 5 and 6, the branch branch pipe forming member 40 has a saddle 42 communicating with the hollow portion of the branch 41 at one end of the branch 41, and is inclined to the pipe axis. When joined to the outer peripheral surface of the peripheral wall of the inspection hole of the main body 11,
The branch pipe portion 41 faces upward, and a flange portion 43 is provided at the other end. A shutter-type lid 50 is attached to the flange 43, and the inspection hole can be opened and closed by opening and closing the lid 50.

In the example shown in FIG. 7, the lower end of the vertical pipe main body extension 11 'is connected to the receptacle 111 at the upper end of the vertical pipe main body 11,
An inflow pipe 60 is connected to the vertical pipe main body extension portion 11 'from the lateral direction.

A circular inspection hole 71 is opened in the pipe wall portion of the vertical pipe main body extension 11 ′ on the extension of the inflow pipe 60, and a circular lid 72 for closing the inspection hole 71 is provided.
The inner surface of the lid portion 72 has an arc surface substantially similar to the inner surface of the vertical pipe main body extension portion 11 '.

In the example shown in FIG. 8, the inflow pipe 60 'is connected so as to cross the vertical pipe main body extension 11' in a cross shape. An inspection hole 81 is opened at a portion of the inflow pipe 60 ′ beyond the intersection with the vertical pipe main body extension 11 ′.
Is provided. The inner surface of the lid 82 is a circular arc surface substantially along the inner surface of the vertical pipe main body extension 11 '.

In the example shown in FIG. 9, a screen 90 is further provided in the middle of the inflow pipe 60 in the example shown in FIG. 7, and the screen 90 can be pulled upward to remove the mist. ing. The screen mesh is preferably about 50 mm to remove driftwood and large stones. If the mesh is too fine, the water level tends to rise, and if it is too large, driftwood and stones cannot be removed.

In the example shown in FIG. 10, a screen 90 is further provided on the inner surface of the lid 72 in the example shown in FIG. 7, and the screen 90 removes the dust by opening the lid 72. Is available.

[0041]

The present invention will be described below with reference to examples. Example 1 A tube with an internal spiral guideway described with reference to FIGS. As shown in FIG. 1, the vertical pipe 10 is made of hard polyvinyl chloride and has an inlet 111 for connecting an inflow pipe integrally provided at the upper end of a vertical pipe main body 11 having a thickness of 6 mm and an inner diameter of 350 mm. At the upper part (L1 section in FIG. 1) of the pipe main body 11, upper spiral guide paths 12 made of hard polyvinyl chloride and having a thickness of 8 mm: an outer diameter of 350 mm and an inner diameter of 110 mm are arranged at three pitches, and a lower part (L2 section in FIG. 1). ), The lower spiral guideway 12 ′ made of hard polyvinyl chloride and having a thickness of 8 mm and an outer diameter of 350 mm is arranged at 6 pitches, and a portion where an intermediate spiral guideway is not arranged (section L2 in FIG. 1). An inspection hole having a diameter of 150 mm was opened in a pipe wall at a position 600 mm from the upper end of the lower spiral guide path 12 ′.

As shown in FIG. 3, the branch branch pipe forming member 20 is made of hard polyvinyl chloride, has a saddle part 22 and a branch pipe part 21, and has a flange 23 at the tip of the branch pipe part 21. A branch branch pipe (saddle) was used. The cover 30 was made of an acrylic plate.

As shown in FIG. 4, the saddle portion 22 of the branch tube forming member 20 is joined to the outer peripheral surface of the peripheral wall of the inspection hole, and closed by the lid portion 30 fixed to the flange portion 23 of the branch tube portion 21. A tube with an internal spiral guideway was made. Work to close the inspection hole opened in the middle of the vertical pipe main body could be performed quickly.

Further, the obtained pipe with an internal spiral guide path is provided with an inspection hole at a position close to a position where there is a risk of clogging or abrasion, which is opened in the middle of the vertical pipe main body by opening the lid portion 30. I was able to open it. Then, the inspection can be performed visually or by inserting a camera through the inspection hole, and the position of the clogging or wear of the vertical pipe main body can be easily confirmed and repaired.

As shown in FIG. 5, a branch branch pipe forming member 40 is provided.
As shown in FIG. 6, the saddle portion 42 is
1 except that the branch pipe 41 is joined to the outer peripheral surface of the peripheral wall of the inspection hole 1 so that the branch pipe 41 faces upward by 30 ° with respect to the horizontal plane
In the same manner as in Example 1, a tube with an internal spiral guide path was produced. Work to close the inspection hole opened in the middle of the vertical pipe main body could be performed quickly.

Further, by opening the lid 50, the obtained pipe with the internal spiral guide path is provided with an inspection hole at a position close to the position where the clogging or abrasion is likely to occur in the middle of the vertical pipe main body. I was able to open it. Then, it can be easily inspected by visually checking the inspection hole or by inserting the camera from the branch pipe provided upward, and it is easy to check the position of clogging and wear in the middle of the vertical pipe main body and repair it easily. I was able to.

As shown in FIG. 6, the vertical pipe main body extension 11 '
An inspection hole 71 is opened in a pipe wall portion on an extension of the inflow pipe 60, and a lid 72 for closing the inspection hole 71 is provided. A tube with an inner spiral guide path was prepared in which the inner surface of the lid portion 72 had an arc surface substantially the same as the inner surface of the vertical tube main body extension 11 '. At the same time as rainwater inflow from the upstream of the inflow pipe, bamboo (L = 2
000 mm). At the same time, the accumulation of dirt and the like started, but by opening the lid 72, the rod bamboo and the dirt related thereto could be easily removed, and the inflow water could flow down without stagnation.

[0048]

Since the pipe with the internal spiral guideway of the present invention is constructed as described above, it is possible to easily check the position of clogging or abrasion at the upper part of the vertical pipe main body or in the middle thereof and repair it easily. .

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view illustrating an example of a vertical pipe used in the present invention.

FIG. 2 is a front view showing an example of a spiral guideway used in the present invention.

FIG. 3 is a perspective view showing an example of a branch branch pipe forming member used in the present invention.

FIG. 4 is an enlarged perspective view showing a part of an example of a tube with an internal spiral guideway of the present invention.

FIG. 5 is a perspective view showing another example of the branch branch pipe forming member used in the present invention.

FIG. 6 is an enlarged perspective view showing a part of another example of the tube with the internal spiral guideway of the present invention.

FIG. 7 (a) is a front view showing a part of another example of the tube with the internal spiral guideway of the present invention, and FIG. 7 (b) is AA of FIG.
It is sectional drawing which follows a line.

FIG. 8A is a perspective view showing a part of another example of the tube with the internal spiral guideway of the present invention, and FIG. 8B is a BB line of FIG.
It is sectional drawing which follows a line.

FIG. 9 is an enlarged front view showing a part of still another example of the tube with the internal spiral guideway of the present invention.

FIG. 10 is an enlarged sectional view showing a part of still another example of the tube with the internal spiral guideway of the present invention.

FIG. 11 is a sectional view showing an example of a conventional vertical pipe for sewerage.

[Explanation of symbols]

 Reference Signs List 10 vertical pipe 11 vertical pipe main body 12, 12 'helical guideway 20, 40 branch branch pipe forming member 21, 41 branch pipe section 22, 42 saddle section 30, 50, 72, 82 lid section 71, 81 inspection hole

Claims (5)

[Claims] 1. A pipe with an internal spiral guide path provided with a spiral guide path for allowing water to flow down spirally in a vertical pipe main body, wherein an inspection hole is opened in the middle of the vertical pipe main body. A tube with an internal spiral guide path, wherein the hole is openable and closable by a closing member. 2. The inner spiral guide according to claim 1, wherein the closing member of the inspection hole comprises a branch branch pipe forming member having a saddle part and a branch pipe part, and a lid part closing the branch pipe part. Road pipe. 3. The pipe with an internal spiral guide path according to claim 2, wherein the branch pipe section of the branch branch pipe forming member is provided upward. 4. An inner surface spiral guide path in which an inflow pipe is connected to an upper portion of the vertical pipe body from a lateral direction, and a spiral guide path for spirally flowing water from the inflow pipe is provided in the vertical pipe body. A pipe, wherein an inspection hole is opened in a pipe wall portion of the vertical pipe main body on an extension of the inflow pipe, a lid is provided to close the inspection hole, and an inner surface of the lid is an inner surface of the vertical pipe main body. A pipe with an internal spiral guideway, characterized in that the pipe has an arc surface substantially similar to that of the above. 5. A screen is provided in the middle of the inflow pipe or on the inner surface of the lid.
A tube with an internal spiral guideway according to claim 1.