JPH0410473Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a piping structure used for piping subjected to vibrations of a refrigerator or the like.

[Prior art and its problems]

BACKGROUND ART Conventionally, in piping systems such as refrigerators, vibrations caused by the drive of a compressor propagate to the piping system, often damaging connections and bent parts in the piping system.

Therefore, conventionally, a bellows pipe is connected in the middle of the piping.
Vibrations are absorbed by the axial expansion and contraction of this bellows tube.

However, in the case of a piping system through which high-pressure fluid flows, the bellows tube expands in the axial direction due to internal pressure and loses its expansion and contraction function, making it unable to absorb vibrations transmitted to the piping system, resulting in no vibration-proofing effect. The drawback was that it disappeared.

[Purpose of invention]

In view of this, the present invention has been devised for the purpose of providing a piping structure having a vibration absorbing device that can effectively prevent vibrations from being propagated to the piping system.

[Summary of the idea]

In order to achieve the above object, the present invention provides flanges on the front and rear outer periphery of a bellows part in which a plurality of folds are arranged in the axial direction of the circumferential surface, and a wire rod is provided between these flanges to limit the extension of the bellows part. It is characterized in that a vibration absorbing device formed by a non-stretchable straight extension limiting member is connected to the piping, and the vibration absorbing device is connected to the piping with different axes. This makes it possible to absorb vibrations in two-dimensional and three-dimensional directions.

[Example of idea]

Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.

As shown in FIG. 1, the vibration absorbing device 1 includes a plurality of folds 2A on the circumferential surface of a thin metal tube or a non-metal tube.
A bellows pipe 3 having bellows portions 2 arranged in rows in the axial direction.
and an extension limiting member 5 that connects flanges 4, 4 fitted to the front and rear outer peripheries of the bellows portion 2.

The elongation limiting member 5 is made of a material that is difficult to stretch, such as a non-stretchable member in which thin metal wires or various fibers are arranged in the axial direction, and both ends thereof are fixed to the flanges 4, 4. Note that materials other than those mentioned above may be used as long as they do not stretch easily when a tensile force is applied.

Therefore, even if the bellows part 2 tries to expand due to the pressure of the high-pressure fluid flowing inside the pipe, the extension limiter 5 restricts the extension beyond a certain length, so the bellows part 2
The bellows part 2 is prevented from stretching and becoming rigid, and movement in the direction of arrow A in Figure 1 is allowed, so the vibration absorption performance is not lost, and the function as a protective member for the bellows part 2 is maintained. have

Note that the elongation limiting member 5 has flanges 4, 4.
Whether the number is two symmetrically located on the diametrical line, three equiangularly arranged, or more is selected as appropriate depending on the pressure inside the bellows tube 3, the degree of vibration absorption, etc.

FIG. 2 shows an example of piping for absorbing three-dimensional vibrations, and in this example, vibration absorbers 1, 1 are connected to piping 6 bent at right angles. According to this, three-dimensional vibrations can be absorbed by combining the movements in the directions of arrows A and A'.

According to the above-mentioned right-angled piping, if the flow resistance of the fluid is large, the piping should be installed at an obtuse angle as shown in FIG. do it.

[Effect of idea]

As explained above, the present invention provides flanges on the front and rear outer periphery of a bellows part in which a plurality of folds are lined up in the axial direction of the circumferential surface, and a non-wire made of a wire material that restricts the extension of the bellows part between these flanges. Since the vibration absorbing device, which is made by connecting elastic straight extension limiting members, is connected inside the piping, the vibration absorbing properties of the bellows tube will not be impaired even when high-pressure fluid flows inside the piping, and vibrations will not occur in the piping. transmission can be effectively prevented. In addition, by using a piping structure in which the vibration absorbers are connected to piping with different axes, it is possible to prevent not only two-dimensional vibration but also three-dimensional vibration, as well as protect the bellows part. Excellent effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional view showing an example of a vibration absorbing device according to the present invention, and FIGS. 2 and 3 are schematic vertical cross-sectional views showing examples of a piping structure. DESCRIPTION OF SYMBOLS 1... Vibration absorber, 2... Bellows part, 3... Bellows pipe, 4, 4... Flange, 5... Extension limiting member, 6... Piping.

Claims (1)

[Claims for Utility Model Registration] 1. Flanges are provided on the front and rear outer periphery of a bellows part in which a plurality of folds are lined up in the axial direction of the circumferential surface, and a non-stretchable wire rod is provided between these flanges to limit the extension of the bellows part. What is claimed is: 1. A piping structure having a vibration absorbing device, characterized in that the vibration absorbing device is connected to the piping by a vibration absorbing device coupled with a straight extension limiting member. 2. A piping structure having a vibration absorbing device according to claim 1, wherein the vibration absorbing device is connected to piping having different axes.