JP4082526B2 - Pipe with spiral guide - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe with a spiral guide path that is suitably used for a natural flow type vertical sewer pipe.
[0002]
[Prior art]
Conventionally, the upper end of the vertical pipe is connected to one end of the inflow pipe projecting from the side wall of the manhole into the manhole through a bent pipe, and the lower end of the vertical pipe is installed at the bottom of the manhole and is placed in the manhole by the inflow pipe. It is known to introduce the introduced sewage into the bottom of the manhole by a 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, in JP-A-8-41915, as shown in FIG. 4, a sewer vertical pipe provided with a bent flow path spirally formed from the upper end to the lower end along the inner surface of the vertical pipe body a. Has been proposed.
A cruciform joint b is connected to the upper end of the sewer vertical pipe, and one end of the inflow pipe d introduced into the manhole c is connected through the cruciform joint. The sewage in the inflow pipe d is connected to the joint b. It is designed to be introduced into the vertical sewer pipe.
[0005]
In order to manufacture the above-mentioned vertical pipe for sewerage, a spiral guide path having a hollow axial center portion is integrally formed by the filament winding method with an inner mold rotating within the pipe body (Japanese Patent Application No. 7-325494).
A short pipe provided with a spiral guide path in the short pipe main body is overlapped and joined (Japanese Patent Application No. 8-105330).
And so on.
[0006]
However, since the vertical pipe and the spiral guideway are fixed in the vertical pipe for sewer obtained by the above method, the maintenance management in the vertical pipe is
a) A hole is made at an arbitrary position of the vertical pipe.
b) Insert a small camera from the top of the vertical tube.
It was by the method.
[0007]
[Problems to be solved by the invention]
However, in the method a), the effect of the spiral guide path is impaired by making a hole, and in the method b), water is splashed by the water flow, and the camera screen is shaken. There was a problem that I could not.
[0008]
Furthermore, when an existing vertical pipe without a guide path is changed to a pipe with a guide path, it is necessary to remove the existing pipe, which takes time.
[0009]
An object of the present invention is to solve the above-described problems, and to provide a pipe with a spiral guideway that can easily maintain and manage a vertical pipe and can easily install a guideway in an existing pipe.
[0010]
[Means for Solving the Problems]
The pipe with a spiral guide path of the present invention is provided with a spiral guide path provided with a hollow air core cylinder and a spiral guide path integrally provided on the outer peripheral surface of the air core cylinder inside a straight tubular vertical pipe main body. a tube, the upper end of the air core barrel, the locking portion is provided which is mounted and fixed so as to cover the upper end of the vertical pipe main body, in a state where the locking portion and the air core tube are integrated It can be removed from the vertical tube body .
[0011]
Oite helically guideway with tubes of the present invention, the locking portion has an upper has been opened, preferably being capable degassed from the air core tube, also the guide plate to the air core tube The air core tube and the spiral guide path may be inserted while being guided by the guide plate into the vertical tube main body. Further, the integrated air core cylinder and the spiral guide path are inserted into the vertical pipe main body part and covered by the upper end of the vertical pipe main body part, and the outer periphery of this locking part is attached and fixed by tightening with a band. Further, it can be removed by loosening the band of this locking part, and this band may have a configuration in which rubber is mounted on the inner surface. Furthermore, a rubber band-shaped elastic body may be integrally bonded to the outer peripheral edge of the spiral guide path over the entire length thereof .
[0012]
In the present invention, the air core cylinder is preferably provided so as to reach below the bottom of the uppermost inflow pipe that flows into the vertical pipe, and the spiral guide path is the lowest position that flows into the vertical pipe. It is preferable to be provided so as to reach below the bottom of the inflow pipe.
[0013]
The material of the spiral guide path used in the present invention is preferably manufactured from a thermoplastic resin, a thermosetting resin, or a metal. Examples of the thermoplastic resin include vinyl chloride resins; olefin resins such as polyethylene and polypropylene; methacrylic resins and the like.
[0014]
Examples of the thermosetting resin include unsaturated polyester resins, vinyl ester resins, and epoxy resins. Furthermore, what reinforced these resin with fibers, such as an inorganic fiber, glass fiber, organic fiber, carbon fiber, aramid fiber, vinylon fiber, can also be used.
Of these, vinyl chloride resins, glass fiber reinforced unsaturated polyester resins, and the like are preferable in terms of workability and lightness.
[0015]
The height of the spiral guide path is preferably 1/20 to 5/12 of the diameter of the guide path.
The thickness of the spiral guide path is preferably 0.5 to 15% of the diameter of the vertical pipe body.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a partial cross-sectional view showing a pipe with a spiral guideway according to the present invention.
In FIG. 1, a pipe 10 with a spiral guide path is a vertical pipe, and includes a vertical pipe main body 11 and spiral guide paths 12 and 12 '.
A locking portion 111 is provided at the upper end of the vertical tube main body portion 11.
At the upper part in the vertical tube main body 11, an air core cylinder 13 having a hollow inside is erected substantially at the center and fixed to the locking part 111.
A first spiral guide path 12 is disposed between the inner peripheral surface of the vertical tube main body 11 and the outer peripheral surface of the air core cylinder 13, and the inner peripheral surface of the first spiral guide path 12 is an air core. The tube 13 is integrally attached to the outer peripheral surface.
[0017]
An outflow pipe 15 is connected to the lower end of the vertical pipe main body 11, and a second spiral guide path 12 ′ is disposed inside the vertical pipe main body 11 slightly above the top of the outflow pipe 15. Has been.
The second spiral guide path 12 ′ is not attached to the air core cylinder 13.
No spiral guide path is disposed between the first spiral guide path 12 and the second spiral guide path 12 ′ inside the vertical pipe body 11.
[0018]
FIG. 2 is a side view showing the first spiral guide path 12, the air core cylinder 13, and the locking portion 111 in an integrated manner.
As shown in FIG. 2, the inner peripheral surface of the first spiral guide path 12 is integrally attached to the outer peripheral surface of the air core tube 13, and the outer peripheral edge of the first spiral guide path 12 extends over the entire length thereof. For example, a rubber-like elastic body 14 made of rubber is integrally bonded with an adhesive. The elastic body 14 is in pressure contact with the inner peripheral surface of the vertical tube body 11 to support the spiral guide path 12 in the vertical tube body 11.
Further, a guide 16 is integrally attached to the outer peripheral surface of the upper portion of the air core cylinder 13.
An elastic body similar to the above is also integrally bonded to the outer peripheral edge of the second spiral guide path 12 'with an adhesive (not shown).
[0019]
FIG. 3 is a plan view for explaining a method of fixing the air core tube 13 and the locking portion 111. As shown in FIG. 3, the locking portion 111 made of a short tube is fixed to the air core tube 13 by four stainless steel support bolts 17 and together with the first spiral guide path 12 as shown in FIG. Fixed and integrated. Note that the upper portion of the locking portion 111 is opened so that the air core tube 13 can be degassed.
[0020]
Then, the first spiral guide path 12 in which the air core cylinder 13 and the locking portion 111 are integrated into the vertical tube main body 11 is inserted into the vertical tube main body 11 while being guided by the guide 16, and The stopper part 111 is put on the upper end of the vertical pipe body part 11, and the outer periphery of the engaging part 111 is fastened with a stainless steel band (not shown), whereby the pipe 10 with the spiral guide path is completed.
[0021]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples.
Example 1
A tube 10 with a spiral guideway according to the present invention shown in FIG. 1 was manufactured as follows.
First, the vertical tube body 11 (made of vinyl chloride resin, inner diameter 350 mm, wall thickness 6 mm) was placed in a manhole. Next, a vinyl chloride resin plate having a thickness of 8 mm is spirally disposed at the lower portion of the vertical tube main body 11 with a pitch of 200 mm and six piles, and a rubber band elastic body having a thickness of 2 mm is bonded to the outer periphery. It inserted in the lower part of the vertical pipe main-body part 11 as 2nd spiral guide path 12 ', and was fixed with the volt | bolt.
[0022]
On the other hand, on the outer periphery of an air core cylinder 13 (made of vinyl chloride resin) having an outer diameter of 110 mm, three vinyl chloride resin plates having a thickness of 8 mm were arranged in a spiral manner with a pitch of 200 mm and welded. A rubber band-like elastic body 14 having a thickness of 2 mm was adhered to the outer peripheral edge of the vinyl chloride resin plate, and a first spiral guide path 12 having an air core tube 13 fixed at a substantially central portion was obtained.
[0023]
Next, as shown in FIG. 3, the vinyl chloride grease plate was fixed to the air core tube 13 together with the guide plate 16 with a stainless steel bolt 17 and integrated.
[0024]
This vinyl chloride short tube is inserted as an engaging portion 111 from the upper part of the vertical tube main body 11, and the outer periphery of the engaging portion 111 is fixed by tightening a stainless steel band (attaching 2 mm thick rubber on the inner surface), A tube 10 with a spiral guideway was obtained and the construction was completed.
[0025]
The time required for the above work was 50 minutes, which was shortened to about 1/3 including the demolding time as compared with the conventional process (method described in Japanese Patent Application No. 7-325494).
[0026]
One month after the construction, the stainless steel strip is loosened, the first spiral guide path 12 in which the locking portion 111 and the air core cylinder 13 are integrated is removed, and it is confirmed that there is no clogging of foreign matters, and at the same time, the second It was confirmed that there was no foreign matter clogging in the spiral guide path 12 '.
[0027]
(Example 2)
A thermosetting resin prepared by adding 1.2 parts by weight of a methyl ethyl ketone peroxide curing agent and an appropriate amount of a curing accelerator to 100 parts by weight of an unsaturated polyester resin was prepared, and roving of 2230 g / m ² (Asahi Fiber) ), 450 g / m ² glass cloth (Asahi Fibers Co., Ltd.), and 330 g / m ² chopped strand mat (Asahi Fibers Co., Ltd.) were prepared. Then, a roving, a glass cloth, and a chopped strand mat are impregnated with an unsaturated polyester resin, respectively, and a second spiral guide path 12 ′ having a thickness of 5 mm, an outer diameter of 700 mm, an inner diameter of 240 mm, and an axial length of 340 mm. Six short pipes were manufactured.
[0028]
Thereafter, the manufactured short pipe was inserted into the vertical pipe main body 11 (wall thickness: 14 mm) made of fiber reinforced plastic mortar while stacking the second spiral guide paths 12 ′.
[0029]
On the other hand, in the same manner as the second short pipe for the spiral guide path 12 ′, the first spiral guide path 12 having the air core tube 13 fixed at the substantially central portion was obtained by the hand-up method.
[0030]
Thereafter, in the same manner as in Example 1, the locking portion 111 and the mounting locking portion 111 were integrated to obtain the tube 10 with the spiral guide path, and the construction was completed.
[0031]
The time required for the above work was 20 minutes, which was shortened to about 1/3 including the demolding time as compared with the conventional process (method described in Japanese Patent Application No. 7-325494).
[0032]
One month after the construction, the stainless steel strip is loosened, the first spiral guide path 12 in which the locking portion 111 and the air core cylinder 13 are integrated is removed, and it is confirmed that there is no clogging of foreign matters and the second It was confirmed that there was no foreign matter clogging in the spiral guide path 12 '.
[0033]
【The invention's effect】
In the pipe with a spiral guide path of the present invention, a locking part is attached to the upper part of a straight tubular vertical pipe body, and an air core cylinder having a spiral guide path on the outer periphery is integrated with the locking part in the vertical pipe body part. Since it is made detachable from the vertical pipe body, maintenance management in the vertical pipe can be facilitated, and a guide path can be easily installed in the existing pipe.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing a pipe with a spiral guideway of the present invention.
FIG. 2 is a side view showing a first spiral guide path, an air core tube, and a locking part used in the tube with the spiral guide path shown in FIG.
FIG. 3 is a plan view for explaining a method of fixing the air core tube and the locking portion.
FIG. 4 is a cross-sectional view showing a conventional tube with a spiral guide path.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Pipe | tube vertical pipe 11 with a helical guide path Vertical pipe | tube main-body part 111 Locking part 12, 12 'Spiral guide path 13 Air core cylinder 14 Elastic body 15 Outflow pipe | tube 16 Guide plate 17 Bolt

Claims (5)

A tube with a spiral guide path provided with a hollow air core cylinder and a spiral guide path integrally provided on the outer peripheral surface of the air core cylinder inside the straight tubular vertical tube main body,
The upper end portion of the air core cylinder is provided with a locking portion that is attached and fixed so as to cover the upper end of the vertical tube main body portion. From the vertical tube main body portion in a state where the locking portion and the air core tube are integrated. A tube with a spiral guideway, characterized in that it is removable . The pipe with a spiral guide according to claim 1,
An upper part of the locking part is opened, and the pipe with a spiral guide path can be deaerated from the air core tube. In the pipe | tube with a spiral guideway of Claim 1 or 2,
A guide plate is integrally attached to the air core cylinder, and the air core cylinder and the spiral guide path are guided and inserted into the vertical tube main body by the guide plate. tube. In the pipe | tube with a spiral guideway as described in any one of Claims 1-3,
The locking portion is formed by inserting an integrated air core tube and a spiral guide path into the vertical tube main body portion and covering the upper end of the vertical tube main body portion, and tightening the outer periphery of the locking portion with a band. A pipe with a spiral guideway, which is fixedly attached and can be removed by loosening the strap of the locking portion, and the strap is provided with rubber on the inner surface. In the pipe | tube with a spiral guideway as described in any one of Claims 1-4,
A tube with a spiral guide path, wherein a rubber band-like elastic body is integrally bonded to the outer peripheral edge of the spiral guide path over the entire length thereof.

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