JP2006336422A - Elbow joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elbow joint for remarkably improving settlement of the elbow joint, by miniaturizing an opening part formed on a bottom surface, by using this elbow joint, while largely reducing even flow rate resistance, by solving the problem of clogging, by daringly expanding a diameter in a part feared for the clogging. <P>SOLUTION: In this elbow joint when bending a horizontally laying pipe arranged on a floor surface at a substantially right angle, the elbow joint is constituted so that an internal-external shape inside of an elbow of the joint, is bent at a right angle along the opening part, and the internal shape outside of the elbow is formed as a circular curved surface of 1/4, and holds the cross-sectional area larger than the cross-sectional area of the horizontally laying pipe, and has the elbow joint A, an elbow part 3, the circular curved surface 3a, a floor 4, the opening part 5, the internal-external shape (a right angle) 6 inside of the elbow part 3, the horizontally laying pipe 11, and a metal fitting 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an elbow joint of a drainage system, and more particularly, to provide an elbow joint in a siphon drainage system.

  In the conventional drainage system from watering equipment in apartment houses and detached houses, a predetermined slope can be given to a drain pipe (hereinafter referred to as a horizontal pipe) that is placed on or embedded in the floor surface. The drainage system was required to make the drainage pipes from the watering devices properly merged into a horizontal pipe, which led to the junction joint of the vertical pipe.

  As described above, in the conventional drainage system, since the horizontal pipe is provided with a gradient, if the horizontal pipe is long, it is necessary to enlarge the floor, and there is a wasteful space under the floor. It was pointed out that it could be done. For this reason, it is necessary to design the horizontal pulling tube to be as short as possible, and there is a great limit to the degree of freedom in design.

  In recent years, a siphon drainage system has been proposed to eliminate these drawbacks (Patent Document 1). In such a drainage system, it is not necessary to provide a gradient to the horizontal pipes from each watering device. For example, the drainage system can be sufficiently drained by simply placing it on the floor surface. It joins at a position that is lower than the floor where the surrounding equipment is. This is a drainage system that generates siphons in the water in the horizontal draw pipe using the potential energy of the drop H between the floor surface on which the horizontal draw pipe is arranged and the merging portion, and tries to drain at once.

  Such a siphon drainage system is characterized in that since the drainage from each watering device is guided to the vertical pipe without joining it, one having a relatively thin pipe diameter is used and the underfloor space can be reduced.

JP 2000-297447 A

  However, in the siphon type system, the horizontal pipes from the watering equipment are laid as they are without any gradient, and the horizontal pipes from all the watering equipment do not merge with other pipes as they are in the floor. It is laid on the surface, bent downward around the standpipe and connected as it is to the junction. Existing elbow joints are used for the above-mentioned bent portions. However, when such elbow joints are used, the flow resistance is large, clogging is caused, and water directly hits the pipe, resulting in a large drainage noise. For this reason, if the elbow part is increased in bending, the flow resistance is reduced, but this time there is a disadvantage that the hole to be opened in the floor slab has to be enlarged and the elbow joint is poorly accommodated. The horizontal pulling tube may be bent horizontally and substantially at a right angle by bypassing the concrete body and the like. In this case, the same phenomenon as described above occurs.

  The gist of the present invention is an elbow joint when a horizontal pipe arranged on the floor surface is bent at a substantially right angle, and the inner and outer shapes inside the elbow of the joint are bent at a right angle along the opening. In addition, the inner shape of the outer side of the elbow is a quarter curved surface, and the cross-sectional area larger than the cross-sectional area of the horizontal pipe is maintained.

The elbow joint of the present invention has an enlarged diameter intended for a portion where clogging is a concern, which eliminates the clogging problem and greatly reduces the flow resistance. And by using this elbow joint, the opening part formed in a floor surface can be made small, and the accommodation of the elbow joint also improved markedly.

The elbow joint of the present invention is an enlarged-diameter drainage elbow joint, and is particularly suitable for a joint used in a drainage system using siphon force. Hereinafter, the features of the present invention will be described centering on the case where the horizontal pipe is suspended as it is, but it is needless to say that the case where it is bent horizontally (for example, around a column) as described above is included.

As described above, in the siphon drainage system, the drainage from each watering device does not join in the middle, and the horizontal pulling tube from each device is led as it is to the joining portion of the standing tube. Therefore, although the horizontal pulling tube may be suspended as it is, the horizontal pulling tube is usually connected to the elbow tube. However, in the conventional elbow pipe, the bending diameter of the elbow part is considerably large in consideration of the flow resistance and the clogging phenomenon in the pipe. Therefore, the opening to be opened on the floor surface must be enlarged. In addition, the elbow joint fit in the opening was poor.

The present invention is an improvement of these disadvantages, and is designed to follow an opening opened in the floor with the inner and outer shapes of the elbow pipe at right angles, and the outer shape of the elbow pipe is 1/4. And having a cross-sectional area larger than the cross-sectional area of the horizontal pipe. Although the inner and outer shapes of the elbow pipe are right angles, of course, it is not required to mathematically accurately make a right angle from the relationship with the opening, and the right angle is about ± 5 degrees. The difference is included in the right angle here. Similarly, the inner shape of the outer side of the elbow tube is a ¼ circular curved surface, but this is also the same, and it is needless to say that a slight difference is allowed.

The inner and outer shapes inside the elbow are bent at right angles so as to match the opening, and the elbow outer joint can be easily locked to the edge of the opening. In forming this right-angled part, it was initially assumed that it would have an adverse effect on the drainage flow, but it was found that there was almost no problem with the siphon drainage system.

On the other hand, the outer shape of the elbow was found to be the most important, and the cross-sectional area of this part was made larger than the cross-sectional area of the horizontal draw pipe in consideration of flow resistance and the like. . The degree of the size is about +5 to 40% of the horizontal pulling tube, and the generation of flow resistance and noise hardly becomes a problem by this, so that the specific shape is obtained.

In addition, the inner shape of the outer side of the elbow pipe is a quarter curved surface, but it is needless to say that it may be a rough shape. In addition, the outer diameter of an elbow pipe is 50-150R normally.

Although the elbow pipe of the present invention is usually made of metal, it may be made of resin in some cases. A joint structure that can be connected to the both ends of the elbow pipe with one-touch connection is preferable. This makes it very easy to connect or replace the horizontal pipe or the drooping pipe.

Hereinafter, the present invention will be described in more detail with reference to the drawings.
FIG. 1 is an overall view of a conventional elbow joint a. Further, one-touch connection mechanisms 1 and 2 are provided at both ends of the elbow joint a, and the elbow portion 3 has substantially the same cross-sectional area as the horizontal pulling tube 11. Considering the resistance of the fluid flowing inside and the generation of noise due to the collision of the fluid, the circular curved surface 3a is considerably large. Of course, the same applies to the outer surface of the elbow portion 3. For this reason, in order to maintain the horizontal of the horizontal pipe 11 by using such an elbow joint a, it is necessary not only to open the opening 5 formed in the floor 4 but also to stabilize it. I understand that it is not good.

FIG. 2 is an overall view of the elbow joint A of the present invention. And both ends of the elbow joint A are provided with one-touch connection mechanisms (consisting of tube holding rings and O-rings) 1 and 2, and the outer and inner shapes of the elbow part 3 are circular curved surfaces 3a. The cross-sectional area of the elbow portion 3 is 20% larger than that of the horizontal pulling tube 11. As a result, the resistance of the fluid flowing inside and the generation of noise due to the collision of the fluid can be substantially suppressed.

The inner and outer shapes inside the elbow 3 are bent at a right angle 6 so as to match the opening 5. Thus, as shown in the figure, it can be locked to the edge of the opening 5 formed in the floor 4, and it can be seen that a relatively small opening is sufficient for the opening 5.

The horizontal pipe 11 is normally fixed to the floor 4 with a metal fitting 12, but is supported at a height of about 10 mm from the floor. Therefore, it goes without saying that even if the cross-sectional area of the elbow portion 3 is increased, the amount of the bulge does not become a problem during construction.

FIG. 3 shows an elbow joint A according to the present invention applied in a horizontal position, for example, a plan view around a column that becomes an obstacle in piping. In the figure, reference numeral 7 denotes a column, which is an example in which the column 7 is in contact with the right angle portion 6 of the elbow joint A. As described above, the elbow joint A of the present invention can remove, for example, an obstructive structure at the time of reform without resistance.

In the present invention, the opening formed in the floor can be made smaller by improving the shape of the elbow joint, and the fit to the opening is improved, and there is a problem in terms of flow resistance and noise. It can be used for other drainage systems as well as used for siphon drainage systems, and it can be used not only for drainage but also for fluids such as water. It can be used as a joint.

FIG. 1 is an overall view of a conventional elbow joint a. FIG. 2 is an overall view of the elbow joint a of the present invention. FIG. 3 is a diagram in which the elbow joint a of the present invention is used in a horizontal position.

Explanation of symbols

A ... Elbow fitting,
1, 2, ... Horizontal pipe connection mechanism,
3. Elbow part
3a ... Circular surface,
4 ... floor,
5 ... opening,
6 ... Inner / outer shape (right angle) inside elbow 3
7. Pillar,
11 ... Horizontal pulling tube,
12 ... metal fittings.

Claims (4)

  It is an elbow joint when a horizontal pipe arranged on the floor is bent at a substantially right angle, and the inner and outer shapes inside the elbow of the joint are bent at a right angle along the opening, An elbow joint characterized in that the shape is a ¼ circular curved surface and a cross-sectional area larger than the cross-sectional area of the horizontal pipe is maintained.   The elbow joint according to claim 1, wherein the elbow joint is bent in a horizontal plane.   The elbow joint according to claim 1, wherein the elbow joint is suspended at a right angle from the floor surface.   The elbow joint according to any one of claims 1 to 3, wherein the elbow portion has a cross-sectional area that is 5 to 40% larger than a cross-sectional area of the transverse pipe.

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