JPH0350159B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ground subsidence countermeasure piping method and apparatus for preventing damage to buried pipes due to partial ground subsidence.

For example, if we consider a certain building, the building itself has a sufficient foundation, but
The land near the building usually has no foundation and is prone to subsidence, which causes undue stress on the drainage pipes for rainwater, sewage, etc. that are piped between the building side chamber and the outdoor side chamber. There was a problem that these drain pipes were damaged.

The present invention has been devised to address these conventional problems, and is a ground subsidence countermeasure that can absorb undue stress on pipes due to partial ground subsidence and prevent pipe damage. The object is to provide a piping method and apparatus.

The piping method of the present invention connects two elbow pipes in such a way that they can expand and contract in the axial direction and rotate in the pipe circumferential direction, and also connect the open ends of both elbow pipes to each elbow pipe. The invention of the piping device of the present invention is characterized in that the pipes are connected to the elbow pipe in a state in which each pipe can rotate in the pipe circumferential direction and in a state in which the pipe can tilt to the elbow pipe. The small-diameter straight pipe part of one elbow pipe is loosely fitted into the large-diameter straight pipe part of the other elbow pipe in a state where it can expand and contract in the axial direction and rotate in the circumferential direction of the pipe, and both loosely fitted straight pipe parts A circular elastic joint with a roughly shaped cross section is installed so as to straddle the outer circumferential surface of the tube.
The outer periphery is pressed by the housing, and a ring-shaped elastic member with a roughly shaped cross section is applied so as to straddle the outer periphery of each open end of both elbow pipes and the outer periphery of each open end of the pipe connected to each elbow pipe. It is characterized in that the elbow tube and the pipe are rotatable in the circumferential direction and the outer periphery of the pipe is pressed by a housing so that the joint can be mounted and the pipe can be tilted with respect to the elbow tube.

The present invention will be explained below based on embodiments shown in the drawings.

Figures 1 and 2 show an embodiment in which the present invention is applied to a drainage pipe in a predetermined building, in which reference numeral 1 indicates a drain installed on the building side, and reference numeral 2 indicates the outdoor side. It is a kaisho-masu established in
Both chambers are provided with their center lines shifted by a required width from each other.

Code 3 is a pipe connected to the building side chamber 1,
Reference numeral 4 indicates a pipe connected to the outdoor side hall 2, and both pipes 3 and 4 are arranged substantially parallel to each other.

Reference numeral 5 designates a small-diameter elbow pipe, one open end of which is connected to the open end of the pulp 3 by a joint A so as to be rotatable in the circumferential direction.

Further, the other open ends of the small diameter elbow pipe 5 and the large diameter elbow pipe 6 are loosely fitted into each other, and the joint B allows expansion and contraction in the axial direction and rotation in the circumferential direction of the pipe. connected to the state.

FIG. 3 is a partial cross-sectional view showing details of the joint part A, and in the drawing, reference numeral 7 indicates a cross-section of the joint part A, which is installed so as to straddle the outer circumferential surface of the open end of the small-diameter side elbow pipe 5 and the outer circumferential surface of the open end of the pulp 3. It is a roughly circular elastic joint, and is usually made of a rubber material.

Reference numeral 8 denotes a two-piece housing that presses against the elastic joint 7, and is tightened with two bottle nuts 9, 9' as shown in FIG.

Also, numerals 10 and 10' are stop rings,
The function of preventing separation of the pipe 3 and elbow pipe 5 is achieved by engaging annular grooves 11 and 11' provided around the inner peripheral surface of both sides of the housing 8, respectively.

Therefore, in this joint part A, one pipe 3 is fixed, while the other elbow pipe 5 is fixed.
can freely rotate in this circumferential direction, and can also be eccentric.

Note that the structure of the joint portion A' is also similar to that of the joint portion.

FIG. 4 is a partial sectional view showing details of the joint part B. In this drawing, reference numeral 12 is a large diameter straight pipe part of the large diameter side elbow pipe 6, and this large diameter straight pipe part 1
The small-diameter straight pipe portion 13 of the small-diameter elbow pipe 5 is loosely fitted into the small-diameter side elbow pipe 2 .

Reference numeral 14 denotes a ring-shaped elastic joint having a generally-shaped cross section, which is mounted so as to straddle the outer circumferential surfaces of both the straight pipe parts that are loosely fitted, and is usually made of a rubber material.

Reference numeral 15 designates a two-piece housing that presses against the elastic joint 14, and is fastened with two bolts and nuts 16 and 16' as shown in FIG.

Reference numeral 17 denotes a stop ring attached to the outer circumferential surface of the large-diameter straight pipe section 12, and the elastic joint 14 is fixed by engaging an annular groove 18 provided on the inner circumferential surface of one side of the housing 15. It serves the function of preventing separation from the outer circumferential surface of the large-diameter straight pipe section 12.

Therefore, in this joint part B, the other small diameter straight pipe part 13 can freely rotate in the circumferential direction with respect to one large diameter straight pipe part 12, and
It is possible to expand and contract, and also to be eccentric.

Note that the housings 8 and 15 may be divided into any number of parts greater than or equal to two.

Further, in this embodiment, a case is shown in which two connecting pipes and two elbow pipes are connected in a substantially Z-shape, but the connection is not limited to this, and in other cases, a substantially U-shape is also possible. It is possible to obtain the same effect by connecting multiple piping blocks as described above, and by combining multiple piping blocks described above, long-distance piping is possible. Of course you can get it.

Thus, the present invention has the above configuration.According to the present invention, two elbow pipes are connected in such a manner that they can expand and contract in the axial direction and rotate in the pipe circumferential direction, and each By connecting the connecting pipes so that they can each rotate in the pipe circumferential direction, and in such a way that the pipes can tilt relative to the elbow pipe, even if one of the connecting pipes sinks, the elbow pipes can be easily connected to each other. It rotates and expands and contracts, absorbing unreasonable stress even under large ground subsidence, and the elbow pipe and pipe rotate and tilt to absorb even smaller stresses, effectively preventing pipe damage. It is something to play.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the present invention, and FIG.
3 is a partial sectional view showing the details of the joint part A, and FIG. 4 is a partial sectional view showing the details of the joint part B. A, A', B...Joint part, 1...Building side chamber, 2...Outdoor side chamber, 3, 4...Pipe, 5...Small diameter side elbow pipe, 6...Large diameter side elbow pipe , 7, 14... elastic joint, 8, 15...
Housing, 9, 9'... Bolt nut, 10,
10', 17...stop spring, 11, 11',
18...Annular groove, 12...Large diameter straight pipe section, 13...
Small diameter straight pipe section, 16, 16'...Bolts, nuts.

Claims (1)

[Claims] 1. Two elbow pipes are connected in such a manner that they can expand and contract in the axial direction and rotate in the circumferential direction of the pipe, and the open ends of both elbow pipes are connected to each elbow pipe. A piping method for preventing ground subsidence, characterized in that the pipes are connected to an elbow pipe in a state in which each pipe can rotate in a circumferential direction and in a state in which the pipe can be tilted to an elbow pipe. 2 The small-diameter straight pipe part of one elbow pipe is loosely fitted into the large-diameter straight pipe part of the other elbow pipe in a state where it can expand and contract in the axial direction and rotate in the circumferential direction of the pipe, and both straight pipes are loosely fitted. A circular elastic joint with a roughly shaped cross section is installed so as to straddle the outer circumferential surfaces of the parts, and the outer circumference is pressed by the housing, and the pipes are connected to the outer circumferential surfaces of each open end of both elbow pipes and to the respective elbow pipes. A ring-shaped elastic joint with a roughly shaped cross section is installed so as to straddle the outer periphery of each opening end of the pipe, and the elbow pipe and the pipe are rotatable in the circumferential direction and the pipe is tiltable with respect to the elbow pipe. A piping device for preventing ground subsidence, characterized by having its outer periphery pressed by a housing.