JPH10231971A - Displacement absorbing pipe fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a displacement absorbing pipe fitting with a simple structure which can be provided at low cost. SOLUTION: A displacement absorbing pipe fitting is composed of rigid plates 1, elastic plates 2, and connection flanges 3 mounted on the rigid plates 1 at the ends. The central part of the rigid plate 1 is made void, and also voids are formed in the central part of the elastic plate 2. The rigid plates 1 and elastic plates 2 are affixed to one another in the laminated condition alternately, and a hollow H is formed in such a way as penetrating the inside. An internally rubber-lined pipe 4 of installed on the inside of the hollow H. The connection flange 3 is to connect the piping of a building, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a displacement absorbing joint for piping in a plumbing facility such as a water pipe, a gas pipe or a drain pipe of a building or the like.

[0002]

2. Description of the Related Art Conventionally, as this kind of displacement absorbing joint for piping, as shown in FIGS. 9A and 9B, a rubber flexible joint F is connected to a piping P of a building or the like, respectively. The rubber flexible joints F were connected to each other by orthogonal connection pipes G, and the orthogonal connection pipes G were attached to the movable support beam D with casters, and horizontal displacement occurred in both pipes P, P due to an earthquake or the like. In this case, as shown by a virtual line in FIG. 9A, the support beam D and the rubber flexible joint F move or deform to absorb the displacement.

[0003]

However, the above-described conventional displacement absorption joint for piping has problems such as a complicated structure and high cost.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a displacement absorption joint for piping that can be provided at a low cost with a simple structure. is there.

[0005]

[MEANS FOR SOLVING THE PROBLEMS] A displacement absorption joint for piping of the present invention comprises: a rigid plate such as a steel plate having an air core formed therein;
An elastic plate made of synthetic rubber or the like having an air-core portion formed therein is alternately laminated in a laminated state to form a hollow portion, and an end portion can be connected to a pipe. A lining rubber tube is provided on the inner surface of the hollow portion. Further, another pipe displacement absorbing joint of the present invention surrounds an elastic pipe such as a rubber pipe around a hard ring in a laminated state, and sandwiches the hard rings at both ends at both ends of the elastic pipe. It is characterized in that it is configured by attaching a connection flange. Furthermore, another displacement absorption joint for piping according to the present invention includes a coil spring surrounding an elastic tube such as a rubber tube and connecting flanges to both ends of the elastic tube in a state where both ends of the coil spring are sandwiched. Is attached.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a displacement absorption joint for piping according to the present invention.
, An elastic plate 2 and connection flanges 3 attached to the rigid plates 1 at both ends.

As is clear from FIG. 2, the center of the rigid plate 1 is an air core 1a and the elastic plate 2
An air core portion 2a is also formed at the center of. The rigid plate 1 and the elastic plate 2 are, for example, laminated in an alternately laminated state with an adhesive as appropriate, and a hollow portion H is formed so as to penetrate the inside.

Reference numeral 4 denotes a rubber liner, and the hollow portion H
It is arranged on the inner surface of. When the rigid plate 1 and the elastic plate 2 are securely and stably bonded, the rubber liner 4 may be omitted.

The rigid plate 1 has a thickness of, for example, 3.2 to 3.2.
The center part of a steel sheet of about 4.5 mm is punched out and the air core 1a
It is formed in a donut shape. The rigid plate 1
The material is not limited to the above-mentioned steel plate, and may be any plate having a desired rigidity, such as another metal plate, a synthetic resin plate or a wooden plate. The outer shape of the rigid plate 1a and the shape of the air core 1a are not limited to circular shapes, either.
Any of a rectangle, other polygons, an ellipse, and the like, and a combination thereof may be used.

The elastic plate 2 is, for example, a doughnut-shaped hollow core 2a formed by punching out a central portion of synthetic rubber having a thickness of about 3.5 to 9.0 mm and a rubber hardness of about 40 to 63. It is formed in. The material of the elastic plate 2 is not limited to the above synthetic rubber, but may be another rubber material or an elastic material made of synthetic resin. The shape of the elastic plate 2 may be any shape, but it is most preferable that both the outer shape and the air core portion 2a have the same shape as the rigid plate 1.

Further, as shown in FIG. 3, the connection flange 3 penetrates a slab S of a building or the like, or connects a pipe P fixed to the slab S of a building to the displacement absorbing joint for piping. The device is integrally attached to the rigid plates 1 at both upper and lower ends by welding or the like. The connection flange 3 is connected to the fixed flange R of the pipe P by bolting or the like. The material of the connection flange 3 is not limited to metal, but may be synthetic resin or wood.

Next, the operation of the displacement absorbing joint for piping according to the above configuration will be described. First, as shown in FIG. 4, when the upper and lower slabs S, S, on which the upper and lower pipes P are fixed, are displaced in the horizontal direction (the direction of the arrow) with respect to each other due to horizontal vibration such as an earthquake, particularly, the displacement-absorbing joints for the pipes are particularly required. The elastic plate 2 is deformed. The elastic plate 2 is largely constrained by the bonded rigid plate 1 in the same manner as the function of the seismic isolation rubber, so that only the circumferential portion can expand and contract. Therefore, a large resistance is exhibited in expansion and contraction in the vertical axis direction with a volume change, and shear deformation without a volume change can be deformed because it is not restrained by the rigid plate 1. As a result, the pipe displacement absorbing joint is displaced in the horizontal direction without substantially changing the vertical distance between the connection flanges 3 at both ends.

In the above embodiment, the connection flange 3 is attached to the rigid plates 1 at both ends, but as shown in FIG.
The rigid plates 1 ', 1' at both ends may be configured as connection flanges so as to be directly connected to piping. The means for connecting the joint of the present invention to the pipe is not limited to the connection flange described above. For example, a screw may be cut into the rigid plates 1 at both ends, and the pipe P may be connected to the pipe P by screwing or tightening. In short, any structure may be used as long as the joint can be reliably and stably connected to the pipe P, such as by fixing with a band or the like.

FIG. 6 shows another embodiment of the displacement-absorbing joint for piping according to the present invention.
And an elastic pipe such as a rubber pipe 6 disposed on the inner surface of the laminated rigid ring 5 and a connection flange 7 attached to both ends of the rubber pipe 6 so as to sandwich the rigid rings 5 at both ends. It is configured. As shown in FIG. 7, the displacement absorption joint for piping of this embodiment can be easily deformed in the horizontal direction (the direction of the arrow) with little displacement in the vertical direction. The rigid ring 5 may be replaced with a coil spring (not shown).

As shown in FIG. 3, the joint of the present invention can be connected not only in a vertical direction between pipes but also in a horizontal direction or an inclined direction. However, this is limited to the case where the two pipes are displaced in the lateral direction with little change in the distance (spacing) between the connection parts.

FIG. 8 shows a configuration in which a plurality of (two in this embodiment) joints are connected in series to cope with a case where the distance and displacement between the upper and lower pipes P are large. In addition, by connecting a plurality of joints to each other at a predetermined angle (for example, a right angle), it is possible to configure so that not only horizontal displacement but also vertical displacement between the pipes P can be dealt with.

[0017]

The displacement absorbing joint for piping of the present invention has a structure in which a rigid plate and an elastic plate are laminated, or a structure in which a rubber tube is arranged inside a rigid ring or a coil spring.
It can be provided simply and inexpensively. 2) The displacement can be made in the horizontal direction (lateral direction) without substantially changing the vertical distance (spacing) of the connection flanges at both ends. 3) The rigid plate that restrains the elastic plate of synthetic rubber or the like can prevent the elastic plate from being excessively deformed by pressure from inside and outside.

[Brief description of the drawings]

FIG. 1 is a half section showing an embodiment of a displacement absorption joint for piping according to the present invention.

FIG. 2 is a perspective view of a pair of a rigid plate and an elastic plate constituting the displacement absorption joint for piping of FIG. 1;

FIG. 3 is an explanatory view of a configuration in which the pipe displacement absorbing joint of FIG. 1 is connected to a building pipe.

FIG. 4 is an operation explanatory view of the displacement absorbing joint for piping of FIG. 3;

FIG. 5 is a half section showing another embodiment of the displacement absorbing joint for piping according to the present invention.

FIG. 6 is a half sectional view showing still another embodiment of the displacement absorption joint for piping of the present invention.

FIG. 7 is an operation explanatory view of the displacement absorbing joint for piping of FIG. 6;

8A and 8B are a configuration diagram (A) and an operation explanatory diagram (B) of an embodiment in which two joints are connected in series.

FIG. 9 is an explanatory view of a conventional displacement absorption joint for piping.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rigid plate 1a Air core 1 'Rigid plates at both ends 2 Elastic plate 2a Air core 3 Connection flange 4 Internal rubber tube 5 Rigid ring 6 Rubber tube 7 Connection flange D Support beam F Rubber flexible joint H Hollow portion P Piping R Fixed flange S Slab

Claims (4)

[Claims] 1. A hollow portion is formed by alternately laminating a rigid plate such as a steel plate having an air core formed therein and an elastic plate such as a synthetic rubber having an air core formed therein. A displacement absorption joint for piping, the end of which is configured to be connectable to piping. 2. The displacement absorption joint for piping according to claim 1, wherein an elastic pipe such as a rubber lining is disposed on an inner surface of the hollow portion. 3. An elastic tube such as a rubber tube is surrounded by hard rings stacked thereon, and connection flanges are attached to both ends of the elastic tube while sandwiching the hard rings at both ends. Characteristic displacement absorption joint for piping. 4. An elastic tube such as a rubber tube is surrounded by a coil spring, and connection flanges are attached to both ends of the elastic tube while sandwiching both ends of the coil spring. Displacement absorption joint for piping.