JP2000352102A - Method for adjusting height of sewage vertical pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust the height of a vertical pipe by providing a forwardly wound male screw on the outside of a joint portion of an upper vertical pipe, and an inversely wound male screw on the outside of the joint portion of a lower vertical pipe, and connecting the male screws by a collar which has in its inside a female screw which is forwardly wound toward one edge from its center and inversely wound toward the other edge. SOLUTION: When both sewage vertical pipes 1, 2 which each have a spiral guide path formed in the internal surface thereof, are vertically joined by using a connecting collar 3, a male screw 11 is formed on the periphery of a connecting end of the vertical pipe 1 at an upper location of the connection, and a male screw 21 is formed on the periphery of the connecting end of the lower vertical pipe 2 at the same pitch. A female screw formed in the collar 3 is wound in vertically opposite directions with respect to its central portion, and winds up the collar 3 by engaging with the connecting screws at the connecting portion of the upper and lower vertical pipes 1, 2 across both the pipes. Therefore, when an inflow pipe connecting portion is arranged at the upper vertical pipe 1, for instance, if the pipe cannot be rotated on its axis, the vertical pipes 1, 2 can be vertically moved by rotating the collar 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a vertical pipe for sewage and a vertical pipe for sewage used therefor.

[0002]

2. Description of the Related Art A vertical pipe for sewerage is a vertical pipe used to receive sewage from an upper inflow pipe and to guide the sewage to a sewage main pipe at the bottom of a manhole. When is large, a plurality of vertical pipes are added and connected.

[0003]

When such a vertical sewer pipe is constructed, the distance from the inflow part of the sewer to the main sewer is fixed, and the length of the vertical pipe is adjusted accordingly. It is always used to design. However, there is some error in the distance from the inflow section to the outflow section, and in most cases, the length of the vertical pipe is not as designed,
Even when the distance from the inflow section to the sewer main line is actually measured on site, a measurement error or the like may occur.

In order to cope with the above-mentioned error, a method of connecting the vertical tubes in such a case is disclosed in
As described in JP-A-152882, rubber ring connection and flange connection are described, but this method is a method of connecting by inserting a spacer into a gap between pipes.

[0005] However, since the spacer used in this method is required to have a height accuracy of several millimeters, it is difficult to cut the spacer to a required predetermined height on site.
There is also a problem that it is difficult in terms of accuracy and that the workability is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a pipe height adjusting method for connecting a vertical pipe for sewerage, which can easily adjust the height of the vertical pipe. I have.

[0007]

Means for Solving the Problems A method for adjusting the height of a vertical pipe for sewerage of the present invention (Invention 1) for solving the above-mentioned problems is as follows.
When vertical pipes for sewage provided with a spiral guide path for bending and flowing down on the inner surface of the pipes are connected to each other vertically using a connection collar, the winding directions are sequentially arranged outside the joint portion of the upper vertical pipe. A male screw whose winding direction is opposite to that of the forward screw provided on the upper vertical tube is provided outside the joint portion of the lower vertical tube, and the winding direction is inward from the center toward one end. A method of adjusting the pipe height when connecting a vertical pipe for sewerage, characterized in that the female screw in the direction of (1) is joined with a collar provided with a female screw whose winding direction is opposite to the other end.

The vertical pipe for sewage according to claim 2 of the present invention (Invention 2) is characterized in that the vertical pipe for sewage used in the method for joining vertical pipes according to claim 1 is one of the vertical pipes. This is a method for adjusting the pipe height when connecting a vertical pipe for sewerage, wherein an inner collar is fixedly provided inside the pipe.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. In addition, since the figure becomes complicated, the spiral guide path for bending the sewage and flowing down in the vertical pipe is not illustrated in the explanatory diagram.

FIG. 1 shows an outline of a connection state at the time of connecting a vertical pipe for sewerage of Invention 1 and Invention 2.

A male screw 11 is provided on the outer peripheral portion of the connecting end of the vertical tube 1 located above the connecting portion, and is provided on the outer peripheral portion of the connecting end of the vertical tube 2 located below the connecting portion. Also, male screws 21 are provided at the same pitch.

At the connection between the upper and lower vertical tubes 1, there is provided a collar 3 provided with female threads having the same pitch as the pitch of the male threads 11 provided on the vertical tubes 1 on the inner side, and upper and lower vertical tubes 1 and 2. The outer side of the pipe is engaged with the connecting portion screw across both tubes and wound.

The female screw provided on the collar 3 is a screw whose winding directions are opposite to each other in the vertical direction from the center thereof. Therefore, the male screws 11 and 21 provided on the vertical tubes 1 and 2 are provided such that the winding directions of the upper tube 1 and the lower tube 2 are opposite to each other.

Therefore, for example, the upper vertical pipe 1 is provided with a connection portion for an inflow pipe, and the lower vertical pipe 2 is provided with an outlet to a sewage main pipe, and the pipe is rotated around its axis. If this is not possible, by rotating the collar 3, the vertical tubes 1 and 2 can be moved up and down without rotating the vertical tubes 1 and 2 themselves.

The connection procedure between the vertical tubes 1 and 2 and the collar 3 is as follows.
First, after positioning and temporarily fixing the lower vertical tube 2, female screws matching the male screws 21 of the lower vertical tube 2 of the collar 3 are mounted so that the screw pitches of the female screws match each other. Next, the upper vertical tube 1 provided with the male screw 11 so as to match the upper screw pitch of the collar 3 is mounted on the collar 3 so that the screw pitch of the upper screw matches each other.

In this state, when the collar 3 is rotated in a direction of screwing into the lower vertical tube 2, the collar is screwed into the temporarily fixed lower vertical tube 2, and the upper vertical tube 1 is turned into a collar without rotating the tube itself. It is screwed to be pulled in. Therefore, the inflow pipe connection portion provided on the upper vertical pipe 1 is connected to the vertical pipe 1.
Can be moved downward without changing the angle from the axial direction, and can be matched with the existing inflow pipe height. When the collar is turned in the opposite direction, the upper tube moves upwards, so that the height can be easily changed even if it is too low.

As the material of the collar 3 used here, various metallic materials, non-metallic materials molded from a resin material, and the like can be used. In the case of resin, for example, thermoplastic resins such as vinyl chloride resin, olefinic resin such as polyethylene and polypropylene, and methacrylic resin can be used. As thermosetting resin, unsaturated polyester resin, vinyl ester resin, epoxy resin and the like, or carbon fiber,
A fiber reinforced resin reinforced with a reinforcing fiber such as aramid fiber, vinylon fiber or glass fiber can be used.

The material of the collar 3 is not limited to the above-described one, and the collar 3 functions as a collar even if it is not the same material as the vertical pipe, and has abrasion resistance, corrosion resistance, Other materials having chemical resistance or the like can be used.

A male screw 1 is provided outside the vertical tubes 1 and 2 of the connecting portion.
1 and 21 are provided, but if the material of the vertical pipe can be relatively easily threaded, such as metal or resin, the thread may be cut as it is on site. On the other hand, cement, ceramics, F
In the case where it is difficult or impossible to cut the screw at the site as in the case of RPM or the like, as shown in FIG. 2, the auxiliary pipe 4 made of a material such as metal or resin having a substantially same inner diameter than the outer diameter of the vertical pipe is used. Cut a screw on the outer circumference, insert it into the main body of the vertical pipe, glue it with an adhesive 5, etc., and if necessary, fix the FRP laminated body 6 etc. by hand laying up at the site and fix it to the connection part of the vertical pipe There is a method of providing screws.

As the material of the auxiliary collar 7 used here, those made of various metals, those made of a non-metal formed of a resin material, and the like can be used. In the case of resin,
For example, as the thermoplastic resin, a vinyl chloride resin, an olefin resin such as polyethylene or polypropylene, or a methacrylic resin can be used. As thermosetting resin, it is possible to use unsaturated polyester resin, vinyl ester resin, epoxy resin, etc., or fiber reinforced resin reinforced with carbon fiber, aramid fiber, vinylon fiber, glass fiber, etc. it can.

It is desirable to apply a waterproofing agent such as silicon to the gap between the male screw of the vertical tube and the female screw of the collar to stop water, or to apply and fix an adhesive.

According to the second aspect of the present invention, in order to eliminate a gap between the connecting portions of the upper and lower vertical pipes to be connected and to prevent the flow of water from being hindered, the inner surface of the connecting portion has a smooth inner surface collar 7.
Is provided.

The inner collar 7 may be made of various metals, a nonmetal made of a resin material, or the like. In the case of resin, for example, a thermoplastic resin such as vinyl chloride resin, olefinic resin such as polyethylene and polypropylene, and methacrylic resin can be used. As thermosetting resin, it is possible to use unsaturated polyester resin, vinyl ester resin, epoxy resin, etc., or fiber reinforced resin reinforced with carbon fiber, aramid fiber, vinylon fiber, glass fiber, etc. it can.

The inner collar 7 made of these materials only needs to be adhesively fixed to the inner surface of the pipe by selecting the most appropriate adhesive or the like in consideration of the pipe material and the inner collar material. When the vertical pipe and the lower vertical pipe are connected by a collar, the length may be any length that can cover the concave portion of the connection portion formed inside the pipe.

Further, the vertical pipe to which the inner collar is attached and fixed is preferably a vertical pipe arranged above, and since the adhesive is present between the inner collar and the inner wall of the vertical pipe, it is practically used. Occasionally, sewage is less likely to enter the interior collar.

The inner collar 7 having a smooth inner surface is provided with the upper vertical tube 1.
When the sewage falling from the sewage moves to the lower vertical pipe 2, dust and the like contained in the sewage get caught in a concave portion formed at a connection portion when connecting the pipe, or microorganisms are generated in the concave portion and the conduit is narrowed. And it is provided in order to prevent that the sewage circulation is obstructed.

Therefore, the inner surface collar 7 is practically usable even when it is sufficiently confirmed that sewage does not contain dust and the like, and when the inner diameter of the vertical pipe is sufficiently large and the conduit is somewhat narrowed. It may be omitted when there is no problem.

(Function) Since the female screw inside the collar 3 is a reverse screw upward and downward from the center, turning the collar 3 rotates the vertical pipe connected above and below the vertical pipe. You can move up and down without.

(Example) As the upper vertical pipe 1, the outer diameter is 250m.
A pipe provided with an inflow pipe connection port 8 in the upper measuring section was prepared for a vinyl chloride pipe having a length of m. As the lower vertical pipe 2, a pipe having the same outer diameter and the same material as the upper vertical pipe 1 and having a lower end provided with a connecting portion to the sewer main pipe was prepared. Each tube has a 5mm ×
A 10 pitch male screw was provided. However, the winding direction of the screw is such that the upper vertical tube and the lower vertical tube are reverse screws.

As the collar 3, a vinyl chloride collar provided with a collar rotation support protrusion 31 having a length of 100 mm was prepared. A female screw of 5 mm × 10 pitch is provided on the inner circumference of the collar, and the direction of the screw is set to be a reverse screw at the center. It was made to be in the same direction as the winding direction.

As shown in FIG. 3, the difference (fall) between the inflow pipe connection port 8 of the upper vertical pipe 1 and the lower opening of the lower vertical pipe 1 is 8
The upper and lower vertical pipes were arranged so as to be m, and an epoxy adhesive was applied to the female screw portion of the collar 3 and screwed into the lower vertical pipe 2 one thread.

The upper vertical pipe 1 is screwed one thread onto the screwed collar 3, and the height difference between the inflow pipe connection port 8 provided on the upper part of the upper vertical pipe 1 and the existing inflow pipe 9 is measured. As a result, the existing inflow pipe 9 was lower by 21 mm.

The collar 3 is rotated by using the collar rotating support projection 31 attached to the collar 3, and the upper vertical pipe 1 is lowered without changing the direction of the connection port 8 of the inflow pipe, and is made to coincide with the height of the inflow pipe 9. Was. The time required for this was about 5 minutes, which is the time required only for bonding including height adjustment. After the application, the sewage flowed down after the adhesive applied to the screw portion was completely cured, and no water leakage from the pipe connection portion occurred.

On the other hand, in a conventional method of connecting a flange by adjusting the height using a spacer,
The same time took about one hour, and in the present invention, the required time was improved about 10 times that of the conventional method.

[0035]

According to the present invention, troublesome work such as spacer production on site can be eliminated, so that the workability can be greatly improved and the height can be finely adjusted.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing an outline of a connection state when connecting a vertical pipe for sewerage of the present invention.

FIG. 2 is an explanatory view in which an auxiliary pipe is mounted outside a vertical pipe.

FIG. 3 is an explanatory diagram showing an embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper vertical pipe 11 Male screw of upper vertical pipe 2 Lower vertical pipe 21 Male screw of lower vertical pipe 3 Collar 31 Supporter for color rotation 4 Auxiliary pipe 5 Adhesive 6 FRP laminated body 7 Inner surface collar 8 Inflow pipe connection port 9 Existing Inflow pipe

Claims (2)

[Claims] 1. A vertical pipe for sewerage provided with a spiral guideway for bending and flowing down on the inner surface of a pipe, and which are vertically connected to each other by using a connecting collar, outside a joint portion of the upper vertical pipe. A male screw having a winding direction is provided in the order, and a male screw having a winding direction opposite to the forward screw provided in the upper vertical tube is provided outside the joint portion of the lower vertical tube, and the inside is directed from the center to one end. A method of adjusting the pipe height when connecting a vertical pipe for sewerage, characterized in that a female screw having a forward winding direction is joined with a collar provided with a female screw having a reverse winding direction toward the other end. . 2. A vertical pipe for sewage used in the method for joining vertical pipes according to claim 1, wherein an inner surface collar is fixed inside one of the vertical pipes. How to adjust the pipe height when connecting.