JP3545936B2 - Pipe with spiral guideway - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a pipe with a spiral guideway suitable for use in a gravity-flow vertical sewer pipe.
[0002]
[Prior art]
In order to attenuate the sewage flowing into the manhole when the sewage flows into the manhole, for example, as described in Japanese Utility Model Laid-Open No. 8-41915, a vertical sewage pipe (drop shaft) is provided in the manhole. A placement method has been implemented. As the vertical sewage pipe, a pipe with a helical guide path provided with a helical guide path for guiding sewage to flow downward in a helical state is used inside a vertically arranged straight tubular pipe main body. . In addition, an air core tube is provided at the shaft core of the spiral guide path in order to eliminate upwardly the air contained in the sewage guided by the spiral guide path.
[0003]
In such a pipe with a spiral guide path, the sewage flowing into the upper end portion is attenuated while flowing down along the spiral guide path. Therefore, there is no possibility that the bottom of the manhole is subjected to a strong impact due to the sewage flowing down, and wear of the bottom of the manhole is suppressed.
[0004]
[Problems to be solved by the invention]
A spiral guideway for guiding the sewage flowing into the pipe main body so as to spirally flow is usually provided below a sewage inflow portion in the pipe main body. Therefore, when sewage flows in from the upper end of the pipe main body by natural fall, the sewage cannot flow down smoothly along the spiral guide path in the pipe main body, and noise, odor, etc. may be generated. is there.
[0005]
The present invention solves such a conventional problem, and enables a fluid flowing from an inflow pipe to smoothly flow down into a substantially vertical pipe main body while suppressing generation of noise, odor, and the like. It is intended to provide a pipe with a path.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 of the present application (Invention 1) is a tube having an inner surface spiral guide path provided with an air core tube and a spiral guide path in a straight tubular tube main body, the side of the air core tube. A guide plate having an elastic body attached to a side edge thereof along a longitudinal direction is provided upright at a portion above the vicinity of an upper end portion of the spiral guide path so as to block between the inner peripheral surfaces of the pipe main body. This is a tube with a spiral guideway.
[0007]
An invention (invention 2) according to claim 2 of the present application is a pipe with a spiral guide path provided with an air core tube and a spiral guide path in a straight tubular pipe main body, and a side of the air core tube. A guide plate is erected at a portion above the vicinity of the upper end of the spiral guide path so as to block between the inner peripheral surfaces of the tube main body portion, and on the inner peripheral surface of the tube main body portion, A pipe with a spiral guide path provided with a rib for preventing rotation of the guide plate by an inflowing fluid.
[0008]
In the present invention, examples of the material forming the pipe body, the air core tube, the spiral guide path, and the guide plate 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.
[0009]
The height of each spiral guide path is preferably about 1/20 to 5/12 of the diameter of the vertical pipe. The 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 vertical pipe.
The spiral pitch of the spiral guide path is preferably about 1 to 10.
[0010]
In the first aspect of the present invention, the material forming the elastic body may be a foam of a resin such as polyvinyl chloride, polyolefin such as polyethylene or polypropylene, a foamable resin such as polystyrene, a polyurethane foam, natural rubber, SBR, NBR, EPDM. Rubber materials such as synthetic rubber such as chloroprene rubber, butyl rubber, and silicone rubber are used. Particularly, SBR is preferable from the viewpoint of cost and corrosion resistance.
[0011]
[Action]
The pipe with a spiral guideway of the present invention 1 is a tube with an internal spiral guideway provided with an air core tube and a spiral guideway in a straight tube main body, wherein the spiral is located on the side of the air core tube. A guide plate having an elastic body attached to the side edge along the longitudinal direction is provided upright from a portion near the upper end of the guide path so as to block between the inner peripheral surfaces of the tube main body. The sewage flowing into the pipe main body from the inflow pipe is blocked by the guide plate in a state in which rotation is prevented by the frictional resistance on the inner peripheral surface of the pipe main body, and the sewage flows in one direction along the circumferential direction. And the fluid is guided so as to smoothly flow along the turning direction of the spiral guide path, and is further attenuated by colliding with the guide plate.
[0012]
The pipe with the spiral guide path according to the second aspect of the present invention is arranged such that a guide plate is provided at the side of the air core cylinder, at a portion of the side of the air core cylinder above the vicinity of the upper end of the spiral guide path, A rib is provided upright so as to block between the inner peripheral surfaces of the pipe body, and a rib is provided on the inner peripheral surface of the pipe main body portion for preventing rotation of the guide plate due to fluid flowing into the inside of the pipe main body. The sewage flowing into the pipe main body is blocked by the guide plate that is prevented from rotating by the ribs, and flows only in one direction along the circumferential direction, and smoothly flows along the turning direction of the spiral guide path. While being guided to flow, it is further attenuated by colliding with the guide plate.
[0013]
BEST MODE FOR CARRYING OUT 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 pipe with a spiral guideway of the present invention, FIG. 2 is a cross-sectional view along the line AA, and FIG. 3 is a perspective view showing a main part thereof.
[0014]
As shown in FIGS. 1 to 3, the pipe 1 with a spiral guide path includes a pipe main body 11, a spiral guide path 12, and an air core tube 13.
An air core tube 13 having a hollow inside is provided upright at a substantially central portion in an upper portion of the pipe main body 11.
[0015]
The spiral guide path 12 is provided between the inner peripheral surface of the pipe main body 11 and the outer peripheral surface of the air core tube 13.
An inflow pipe 14 is connected to the upper end of the main body 11 at a position above the upper end of the spiral guide path 12.
[0016]
A guide plate 15 having an elastic body 16 attached to a side edge thereof in a longitudinal direction is provided on an inner peripheral surface of the tube main body 11 in a portion of the side of the air core cylinder 13 above the vicinity of the upper end of the spiral guide path 12. The elastic body 16 is in contact with the inner peripheral surface of the tube main body 11 so that the space between them is erected.
[0017]
Hereinafter, the use state of the pipe with the spiral guide path will be described with reference to FIG.
The sewage M that enters the manhole from the sewage pipe flows into the pipe main body 11 from the inflow pipe 14.
At this time, a guide plate 15 having an elastic body 16 attached to a side edge thereof in a longitudinal direction is provided on a side portion of the air core tube 13 above the vicinity of an upper end portion of the spiral guide path 12 and along a longitudinal direction of the pipe main body portion 11. The sewage M is blocked by the elastic plate 16 on the guide plate 15, which is prevented from rotating by the frictional resistance of the inner circumferential surface of the pipe main body 11, because the sewage M is erected so as to block between the inner circumferential surfaces. As a result, the fluid flows only in one direction along the circumferential direction, and is guided so as to flow smoothly along the turning direction of the spiral guide path 12. Further, the sewage M is further attenuated by colliding with the guide plate 15.
[0018]
FIG. 4 is a cross-sectional view showing another example of the pipe with a spiral guideway of the present invention, and FIG. 5 is a cross-sectional view along the line BB.
[0019]
As shown in FIGS. 4 and 5, the pipe 2 with a spiral guide path includes a pipe main body 21, a spiral guide path 22, and an air core tube 23.
An air core tube 23 having a hollow inside is provided upright at an upper portion in the tube main body 21 at a substantially central portion.
[0020]
A spiral guide path 22 is provided between the inner peripheral surface of the tube main body 21 and the outer peripheral surface of the air core tube 23.
An inflow pipe 24 is connected to the upper end of the main body 21 at a position above the upper end of the spiral guide path 12.
[0021]
On the side of the air core tube 23 from the vicinity of the upper end of the spiral guide path 22 to the upper part, the guide plate 25 stands on the side edge along the longitudinal direction so as to block between the inner peripheral surfaces of the pipe main body 21. Is established.
Ribs 26, 26 for preventing rotation of the guide plate 25 due to fluid flowing into the inside of the pipe main body 21 are provided on one surface side of the guide plate 25.
[0022]
Hereinafter, a use state of the pipe with the spiral guide path will be described with reference to FIG.
The sewage M that enters the manhole from the sewage pipe flows into the pipe main body 21 from the inflow pipe 24.
At this time, a guide plate 25 is erected on the side of the air core cylinder 23 above the vicinity of the upper end of the spiral guide path 22 so as to cut off between the inner peripheral surfaces of the pipe main body 21. Since the ribs 26, 26 for preventing rotation of the guide plate 25 due to the fluid flowing into the inside thereof are provided on the inner peripheral surface of the portion 21, the sewage M is blocked by the guide plate 25 and extends along the circumferential direction. Thus, the fluid flows only in one direction, and is guided so as to flow smoothly along the turning direction of the spiral guide path 22. The sewage M is further attenuated by colliding with the guide plate 25.
[0023]
FIG. 6 is a sectional view showing still another example of the tube with a spiral guideway of the present invention.
In the pipe with a spiral guideway of this example, in addition to those described with reference to FIGS. 4 and 5, the inner peripheral surface of the pipe main body 31 is provided on both sides of the guide plate 35 by the fluid flowing into the inside. Ribs 36 and 37 for preventing rotation are provided.
The other structure is the same as that described with reference to FIGS. 4 and 5, and therefore, the corresponding drawing numbers are given in the drawings and detailed description is omitted.
[0024]
【The invention's effect】
Since the pipe with the spiral guide path of the present invention is as described above, the fluid flowing from the inflow pipe is placed in a substantially vertical pipe main body along the circumferential direction while suppressing generation of noise, odor and the like. It can flow down smoothly so that it flows only in one direction.
[Brief description of the drawings]
FIG. 1 is a partial sectional view showing an example of a pipe with a spiral guideway of the present invention.
FIG. 2 is a partial cross-sectional view taken along the line AA of the example shown in FIG.
FIG. 3 is a perspective view showing a main part of the example shown in FIG. 1;
FIG. 4 is a sectional view showing another example of the tube with a spiral guideway of the present invention.
FIG. 5 is a sectional view taken along line BB of the example shown in FIG.
FIG. 6 is a sectional view showing still another example of the tube with a spiral guideway of the present invention.
[Explanation of symbols]
1,2,3 Tubes with spiral guideway 11,21,31 Tube body 12,22,32 Spiral guideways 13,23,33 Air core tubes 14,24,34 Inflow tubes 15,25,35 Guide plate 16 Elasticity Body 26, 36, 37 rib

Claims (2)

A tube with an internal spiral guide path in which an air core tube and a spiral guide path are provided in a straight tubular pipe main body, and a portion of the side of the air core tube above a portion near the upper end of the spiral guide path. A pipe with a spiral guide path, wherein a guide plate having an elastic body attached to a side edge thereof along a longitudinal direction is provided upright so as to block between inner peripheral surfaces of the pipe main body. A pipe with a spiral guide path provided with an air core tube and a spiral guide path in a straight tubular pipe main body, on the side of the air core tube, at a portion above the vicinity of the upper end of the spiral guide path, A guide plate is provided upright so as to block between the inner peripheral surfaces of the tube main body portion, and a rib is provided on the inner peripheral surface of the tube main body portion to prevent rotation of the guide plate due to fluid flowing into the inside thereof. A pipe with a spiral guideway.

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