JPH06341577A - Group type pipe arrangement method - Google Patents

Abstract

PURPOSE:To assemble a pipeline while correcting the bending of the pipeline, without hurting the pipeline in the piping work. CONSTITUTION:Pipes 1 and 1 are connected to have a clearance 8 between a pipe 1 and a pipe 1, by fitting in an arc-form projection 7 in a circular groove 2 of both pipes engraved wider than the tip of the arc-form projection 7. As a result, the neighboring pipes 1 and 1 can be bent easily at the connection, the bending of the pipeline in the piping work can be corrected without generating a damage, and the pipeline can be assembled easily with fewer number of workers, without a specific consideration as to the axial centers of the pipes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of arranging a pipe suitable for being installed indoors, such as a pipe for a fire extinguishing sprinkler.

[0002]

2. Description of the Related Art For example, in a pipe for a fire extinguishing sprinkler, conventionally, in order to connect a pair of butted pipes to each other, a screw is cut on the outer peripheral surface of the ends of both pipes,
It is common to connect with a socket or to provide flanges on the end faces of both pipes and to bolt the flanges together.

It is also practiced to butt pipes and weld the butt portions.

When the pipes are arranged indoors by using the above-mentioned piping method, as the pipelines are formed by joining the pipes, the centerlines of adjacent pipes are deviated, and in the case of a long pipeline, In some cases, the tip of the pipeline does not reach the intended location.

To correct the curvature of this pipeline,
It put some load on the pipeline.

Therefore, excessive bending stress is locally applied to the joint portion of the pipe, which may cause damage to the pipe.

When replacing some pipes with other pipes in the middle of piping, cut some of the pipes or expand the threaded portions of the partially overlapped pipes and pull out some of the pipes. Was there.

However, there is a risk of fire if the pipes are cut with a burner or the like, and if the pipes are spread apart, other piping systems will be damaged.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to correct a curve of a pipeline without damaging the pipeline during piping and to easily assemble the pipeline without using a flame.

[0010]

Means for Solving the Problems A gasket is fitted into one pipe end, and the opening end faces of the other pipes are concentrically opposed to the opening end faces of the one pipe, and then the gaskets are almost attached to both pipes. The pair of half-cylinder-shaped coupling arc-shaped ridges that are offset so as to stride evenly are fitted into the annular grooves of both pipes that are carved wider than the tips of the arc-shaped ridges. A group-type pipe installation method in which the couplings are tightened with assembly bolts and nuts, and pipes are installed sequentially.

[0011]

[Operation] When the arc-shaped ridges are fitted into the annular grooves of both pipes that are wider than the tips of the arc-shaped ridges, a pipeline is formed with a gap between the pipes. .

Therefore, both pipes are easily bent at the connecting portion, the curve of the pipeline during the piping work is corrected without damage, and the pipeline can be easily assembled by a small number of people.

[0013]

1 and 2 show a connecting portion of a pipe used in a first embodiment of the present invention, each pipe (1)
An annular groove (2) (2) is provided on the outer peripheral surface of the end portion of the.

An annular gasket (3) made of synthetic rubber, for example, is fitted between the annular grooves (2) and (2) of the pipes (1) (1) whose end faces are butted against each other without slack.

At the center of the inner peripheral surface of the gasket (3), an annular pressure receiving groove (4) is formed which gradually widens in the radial direction.

A pair of half-cylindrical couplings (5) and (5) are fitted around the outer periphery of the gasket (3) without slack, and both couplings (5) and (5) are bolts (5) (5) orthogonal to the axis. 6) It is concluded with (6).

Arc-shaped ridges (7) and (7) projecting in the centripetal direction are formed on both edges of each coupling (5).
By engaging (7) with the annular groove (2) of each pipe (1), both pipes (1) and (1) are connected.

According to this device, the connected two pipes (1)
The fluid passing through the inside of (1) has a pressure receiving groove (4) of the gasket (3) through a slight gap (8) between the abutting portions of both pipes (1) and (1).
The gasket (3) bulges in the radial direction due to the pressure, and the outer peripheral surface of both pipes (1) (1) and the coupling (5)
The fluid leakage is prevented by pressing the inner peripheral surface of (5).

This connecting portion is formed by the annular groove (2) of the pipe (1).
The inner side surface (2a) of the pipe, that is, the side surface closer to the end surface of the pipe (1) and the inner side surface of the arcuate ridge (7) of the coupling (5) are both parallel to the end surface of the pipe (1). There is.

Further, the width of the annular groove (2) is slightly larger than the width of the arcuate ridge (7), and the outer peripheral surface (2b) of the annular groove (2).
The outer surface of the arc-shaped ridge (7) is slightly separated.

Therefore, even if a slight dimensional error occurs in each member or the end surface of the pipe (1) is slightly irregular, the pipes can be easily connected on site.

FIG. 3 shows one connecting portion of a pipe used in the second embodiment of the present invention. The same members as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only the points will be described.

The side surface (12a) of the annular groove (12) closer to the end surface of the pipe (1) is gradually curved in a direction away from the end surface of the pipe (1) as it approaches the bottom surface of the annular groove (12). There is.

The outer surface (12b) of the annular groove (12) and the outer surface of the arcuate ridge (7) are separated from each other, but the bottom of the curved inner surface (12a) of the annular groove (12) is , Close to the corner of the inner surface of the arc-shaped ridge (7).

Therefore, the curved inner surface (12) of the annular groove (12) is
The bottom part of a) can move laterally until it comes into contact with the corner of the inner surface of the arc-shaped ridge (7), and both pipes (1) (1)
The lateral movement amount of is smaller than that of the connecting portion of the first embodiment.

The inner side surface (12a) of the annular groove (12) may be a flat surface inclined in the same direction instead of the curved surface.

Further, the inner side surface of the arc-shaped ridge (7) or the inner side surface (12a) of the annular groove (12) and the inner side surface of the arc-shaped ridge (7) may both be inclined in the same direction.

Further, as shown in FIG. 4, the cross-sectional shape of the annular groove (12) may be substantially U-shaped in which both inner and outer side surfaces (12a) (12b) are curved in an arc shape.

Further, as shown in FIG. 5, the entire bottom portion (22a) of the annular groove (22) is formed into an arc shape, and the corner portion of the arc-shaped projection (7) of the coupling (5) is brought into contact with it, Coupling (5)
Tightening prevents the pipes (1) (1) and the coupling (5) from moving in both directions along the axis and is more easily bent. Therefore, it is easy to correct the curve of the pipeline.

The procedure for arranging the group type pipe will be described with reference to FIG.

First, the gasket (3) is attached to one pipe (1).
The pipe is fitted into the end (FIG. 6A), and the open end face of the other pipe (1) is concentrically opposed to the open end face of the one pipe (1).

Then, the gasket (3) is attached to both pipes.
(1) Slide so as to stride over (1) almost evenly (Fig. 6 (b)), and replace the arc-shaped ridges (7) of the pair of half-cylindrical couplings (5) with the arc-shaped ridges (7). Both pipes engraved wider than the tip (1)
Fit in the annular groove (2) of (1).

A pair of half-cylindrical couplings are fastened together with the assembling bolt (6) and the nut (6 ') (Fig. 6 (b)), and similar connections are repeated, and pipes are sequentially arranged. .

In this way, by fitting the arc-shaped ridges (7) into the annular grooves (2) of both pipes, which are engraved wider than the tips of the arc-shaped ridges (7), the pipe (1) and Gap between pipe (1)
The pipes (1), (1) ... are connected so as to have (8).

Therefore, the adjacent pipes (1) (1) are easily bent at the connecting portion, and the curve of the pipeline during the plumbing work is corrected without damage, and the axial center of each pipe is taken into consideration. Without having to do so, a small number of people can easily assemble the pipeline.

[0036]

The present invention has the following effects. (a) Since the pipeline is extremely easy to correct the curve when piping, it is not necessary to consider the axial center of the pipeline, and a small number of people can perform the piping work. (b) The specific pipe can be easily replaced by removing the coupling, irrespective of whether the pipe is installed or after the installation.

[Brief description of drawings]

FIG. 1 is a central cross-sectional view of a device of the present invention when a pipe is connected.

FIG. 2 is an enlarged vertical sectional view taken along the line CC of FIG.

FIG. 3 is a partially enlarged view showing a second embodiment of the annular groove.

FIG. 4 is a partially enlarged view showing a modified example of FIG.

5 is a partially enlarged view showing a modified example of FIG.

FIG. 6 is a front view showing an arrangement procedure of pipes.

[Explanation of symbols]

 (1) Pipe (2) Annular groove (2a) Inner surface (2b) Outer surface (3) Gasket (4) Pressure receiving groove (5) Coupling (6) Bolt (6 ') Nut (7) Arc-shaped ridge (8) Gap (12) Annular groove (12a) Inner surface (12b) Outer surface (22) Annular groove (22a) Bottom (22a) Bottom

Claims (1)

[Claims] 1. A gasket is fitted into an end of one pipe, and an opening end face of the other pipe is concentrically opposed to an opening end face of the one pipe, and then the gasket is spread over both pipes substantially evenly. The pair of half-cylinder-shaped coupling arc-shaped ridges that are shifted to each other are fitted into the annular grooves of both pipes carved wide from the tips of the arc-shaped ridges.
A group-type pipe arrangement method in which a pair of couplings are tightened with assembly bolts and nuts, and pipes are arranged sequentially.