JP3423214B2 - How to assemble a tube with a spiral guideway - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a pipe with a spiral guideway, which is preferably used for a natural drainage vertical sewer pipe or the like. 2. Description of the Related Art In order to attenuate sewage flowing down in a manhole when the sewage flows into the manhole by natural flow, for example, as disclosed in JP-A-8-41915, A method of arranging vertical pipes (drop shafts) has been implemented. A guide path is provided inside the vertical pipe for sewage so as to bend 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, there is no possibility that the sewage flowing down will strongly collide with the bottom of the manhole, and the wear of the bottom of the manhole will be suppressed. Such a vertical pipe for sewage is provided with a spiral guideway inside a pipe main body, and is made of, for example, a fiber reinforced resin such as a glass fiber reinforced resin having excellent strength.
Since the pipe main body and the spiral guideway are formed integrally by a hand-re-up method or the like, there is a problem that the assembling workability is poor. Further, when the surface of the pipe is formed integrally with the fiber main body made of fiber reinforced resin when the surface is worn, the spiral guide path is broken and the entire vertical pipe for sewage is replaced. I have to do it. When the vertical pipe for sewage is replaced, there is a problem that the circulation of the sewage must be stopped and the replacement operation takes a long time. SUMMARY OF THE INVENTION The present invention solves such a conventional problem and provides a spiral guideway inside the pipe body with good assembling work so that a certain degree of water stoppage can be expected. A method for assembling a pipe with a spiral guide path that can be provided and that can easily replace only the spiral guide path even when the spiral guide path is damaged by the impact of fluid flowing into the pipe main body. It was made for the purpose. The present invention relates to a method of assembling a pipe with a spiral guide path provided with a spiral guide path inside a pipe main body, wherein the spiral guide path has an outer peripheral edge portion. The spiral guide path is bent upward so as to form an L-shape that is slightly opened outward, and has a tip edge whose outer diameter is slightly larger than the inner diameter of the pipe main body. A method for assembling a pipe with a spiral guide path, which forcibly inserts a top end of the pipe into a predetermined position to lock the vicinity of the leading end edge against the inner peripheral surface of the pipe main body in a resilient state. According to the method of assembling a pipe with a spiral guideway of the present invention, the spiral guideway is bent upward so that the outer peripheral edge thereof forms an L-shape slightly opened outward, and the leading edge thereof is formed. Using a tube having an outer diameter slightly larger than the inner diameter of the pipe body,
By merely forcibly inserting the spiral guideway into the tube main body from above to a predetermined position, the vicinity of the leading edge can be locked in an elastic pressure state with respect to the inner peripheral surface of the tube main body. It is excellent in the workability of assembling when the spiral guideway is provided inside the pipe main body, and even when the spiral guideway is broken by the impact of the fluid flowing into the pipe main body, Since the vicinity of the tip edge is merely pressed against the inner peripheral surface of the tube body, it is not fixed.
Easily pull out only the spiral guideway inside the pipe body,
It can be replaced with a new spiral guideway in a short time. Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partial sectional view of a tube with a spiral guideway assembled according to the present invention. The pipe 10 with a spiral guide path has a straight tubular pipe body 11 made of resin, and a resin spiral guide path 12 spirally provided inside the pipe body 11. . As shown in FIG. 2, the pipe 10 with a spiral guide path is bent upward as a spiral guide path 12 so that the outer peripheral edge 121 has an L-shape that opens slightly outward over the entire length. One having a distal end edge having an outer diameter slightly larger than the inner diameter of the tube body 11 is used. Next, a method for assembling the tube with a spiral guideway of the present invention will be described with reference to FIGS. As shown in FIG. 3, the spiral guide path 12 is forcibly inserted into the pipe main body 11 from above to a predetermined position. As a result, as shown in FIG.
The spiral guide path 12 of the pipe 10 with the spiral guide path is connected to the pipe main body 1.
1 and protrudes inward over about 1/20 to 5/12 of its inner diameter.
Has a hollow portion over its entire length. In this state, the vicinity of the leading edge of the spiral guide path 12 is in a state of being resiliently pressed against the inner peripheral surface of the pipe main body 11, so that a certain degree of waterproofness can be expected. Further, according to this assembling method, the spiral guide path 12 is simply inserted into the pipe main body 11 from above to a predetermined position, and the vicinity of the leading edge is pressed against the inner peripheral surface of the pipe main body 11. Since it can be locked in the state, the assembling workability when the spiral guide path 12 is provided inside the pipe main body 11 is excellent. Also, in the case where the spiral guide path 12 is damaged by the impact of the fluid flowing into the pipe main body 11, the vicinity of the leading edge of the spiral guide path 12 is resiliently pressed against the inner peripheral surface of the pipe main body 11. , It is not fixed, so that only the spiral guide path 12 can be easily pulled out from the pipe main body 11 and replaced with a new spiral guide path in a short time. The spiral guide path 12 is made of a thermoplastic resin, a thermosetting resin, or the like. As a thermoplastic resin,
Vinyl chloride resin, olefin resin (polyethylene, polypropylene, etc.), methacrylic resin and the like are used. As the thermosetting resin, an unsaturated polyester resin such as a vinyl ester resin or an epoxy resin is used. Further, resins reinforced with fibers such as inorganic fibers, glass fibers, organic fibers, carbon fibers, aramid fibers, and vinylon fibers can also be used. The tube body 11 is also made of a thermoplastic resin, a thermosetting resin or the like. As the thermoplastic resin, a vinyl chloride resin, an olefin resin (eg, polyethylene, polypropylene), a methacryl resin, or the like is used. As the thermosetting resin, unsaturated polyester resin,
A vinyl ester resin, an epoxy resin, or the like is used, and a fiber reinforced with a fiber such as an inorganic fiber, a glass fiber, an organic fiber, a carbon fiber, an aramid fiber, and a vinylon fiber can also be used. When the pipe body 11 is made of fiber reinforced resin, the spiral guide path 12 is made of vinyl chloride resin,
It is economical and preferable to produce with a fiber reinforced resin using an unsaturated polyester resin. The method for assembling a pipe with a spiral guideway according to the present invention is performed as described above, so that the spiral guideway is connected to the pipe body with good assembling work so that a certain degree of water stoppage can be expected. In the case where the spiral guideway is broken by the impact of the fluid flowing into the pipe main body, only the spiral guideway can be easily replaced. [0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial sectional view showing an example of a tube with a spiral guideway obtained by the present invention. FIG. 2 is a sectional view showing an example of a spiral guideway used in the present invention. FIG. 3 is a cross-sectional view illustrating the first half of an example of the method for assembling a tube with a spiral guideway according to the present invention. FIG. 4 is a cross-sectional view illustrating the latter half of an example of the method for assembling a tube with a spiral guideway according to the present invention. BRIEF DESCRIPTION OF THE REFERENCE NUMERALS 10 Pipe with helical guideway 11 Pipe main body 12 Spiral guideway 121 Tip edge 121a Near tip edge

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Claims (1)

(57) [Claim 1] A method of assembling a pipe with a spiral guide path provided with a spiral guide path inside a pipe main body, wherein the spiral guide path has a slightly outer peripheral edge. The spiral guide path is bent inside the pipe body using a pipe whose upper edge is bent upward so as to form an L-shape that opens outward, and has a tip edge having an outer diameter slightly larger than the inner diameter of the pipe body. A method for assembling a pipe with a spiral guide path, comprising: forcibly inserting the pipe from the upper side to a predetermined position so as to resiliently lock the vicinity of the distal end against the inner peripheral surface of the pipe main body.