JPS63285386A - Vibrationproof supporter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vibration isolating support device, and particularly to a vibration isolating support device suitable for vibration isolating support of a piping system such as an atomic couplant.

[Conventional technology]

Conventional 1 For example, for supporting piping systems such as atomic couplants, piping support devices that utilize the elastic-plastic properties of members are used to absorb external force energy when piping stretches due to heat or excessive loads during earthquakes. development is underway.

For example, a piping support device described in Japanese Utility Model Application Publication No. 60-99377 has a friction member removably provided at a fitting portion of a pair of rods connected to a piping and a support structure.

Further, the pipe support device described in Japanese Utility Model Application Publication No. 60-123477 is one in which a rod and a housing are provided between the pipe and the support structure, and a spring mesh having hysteresis characteristics is provided in the hollow part of the housing. be.

Furthermore, although the details are not described here,
The one described in Publication No. 75979 is also known.

[Problem that the invention seeks to solve]

The above-mentioned conventional technologies are all pipe support devices that use elastoplastic properties, but they have structurally complex shapes and
In addition, many materials had limitations in terms of usage conditions.

These factors have been a factor in increasing the cost per support device and decreasing reliability.

The present invention was made to solve the problems of the prior art described above, and allows the thermal expansion of supported objects such as piping, absorbs the external force energy in response to excessive loads during earthquakes, and Simple structure, low cost and high reliability compared to conventional
It is an object of the present invention to provide a vibration-proof support device that is maintenance-free.

[Means for solving problems]

In order to achieve the above object, the structure of the vibration isolating support device according to the present invention is such that the vibration isolating support device is fixed to the supporting fixed side and connected to the supported body at least through the clamping means. A fluid substance with little volume change is enclosed within the cylinder that makes up the tube.

Further, the thickness of the cylinder body is varied in the longitudinal direction of the cylinder body so that the stress in each part of the cylinder body is uniform.

More specifically, the main component of the single vibration isolating support device is a cylindrical body whose wall thickness is varied so that the stress at each part due to one bend is constant, and a damping material such as powder is sealed inside.

The wall thickness (plate thickness) of the cylindrical body is changed using the following formula.

πσd'L where t: Wall thickness (plate thickness) W: Load applied to the tip of the cylinder X: Distance from the tip of the cylinder σ: Stress on the outside wall of the cylinder (constant) d: Internal diameter of the cylinder [effect] By the above technical means , without local stress concentration.
Deformation such as thermal expansion of the piping is absorbed within the elastic deformation of the cylinder,
In response to a sudden excessive load such as an earthquake, the cylindrical body deforms in a plastic region and absorbs the energy of the external force.

Furthermore, if the change in wall thickness of the cylinder body is achieved by stacking cylinders with different lengths and diameters, friction will occur between the cylinders of different diameters when the cylinders are deformed by external force, increasing the effect of absorbing external force energy. The powder enclosed within the cylinder prevents unstable phenomena such as local buckling from occurring in the cylinder, and when the cylinder deforms, the amount of external force energy absorbed increases due to the friction between the powder. .

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5.

First, FIG. 1 is a longitudinal cross-sectional view of a vibration-proof support/device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along arrow I-1 in FIG.
FIG. 3 is a conceptual diagram of a method of supporting the piping system.

Generally, as shown in FIG. 3, in order to support equipment such as an atomic couplant or a piping system, a support structure or a fixed body such as a supporting structure or a fixed body and nine equipment are used.

Install a vibration-proof support device 1 or a piping support bag at the required location between the piping system and other supported objects! ! 2 is installed.

The anti-vibration support device of this embodiment is shown in FIGS. 1 and 2.

In the figure, 3 is a cylinder fixed to the supporting fixed side, 4 is a powder related to a fluid substance filled and sealed inside the cylinder 3, 5 is a spherical joint, 6 is a rod, 7 is a piping clamp, 8 is a piping related to a supported body 6 In this embodiment, the supported body is a piping 8, which is connected to a rod 6 by a piping J lamp 7, and this rod 6 is connected to a rod via a spherical joint 5. It is connected to a cylindrical body 3 having an axis perpendicular to the axis of 6.

It is assumed that the pipe 8 vibrates up and down.

The cylindrical body 3 is formed so that the inner diameter is constant and the outer diameter becomes thicker from the tip (free end) to the fixed end, that is, so that the stress distribution approaches equal stress distribution against bending. A flange 3a is formed.

9 is a torizōhei for fixing the cylinder body 3 to the supporting and fixed side; 1
0 is a support structure related to the support fixed side.

That is, in the embodiment shown in FIG. 1, the rod 6 is connected to the cylindrical body 3 fixed to the support structure 1o.

A pipe 8 is supported at the tip.

Now, if the pipe 8 moves slowly in the vertical direction due to thermal elongation due to thermal load, the cylindrical body 3 slowly elastically deforms as the pipe 8 moves, and serves to release the thermal load without fixing the pipe 8. do.

Next, if the piping 8 is subjected to large vertical vibrations due to a sudden excessive load such as an earthquake, the cylindrical body 3 deforms to a plastic region and thus absorbs the vibration energy of the external force.

The thickness of the cylindrical body 3, which is the main component of the vibration isolation support device, is changed so that the stress distribution approaches uniformity with respect to bending, so there is no local stress concentration. Reliability is improved against deformation up to the plastic region.

In addition, powder 4, which is a fluid substance with little volume change, is enclosed inside the cylinder 3, and when the cylinder 3 tries to deform significantly, it causes instability such as local buckling. This prevents this phenomenon from occurring and dissipates vibration energy through friction between powder particles during deformation.

Next, FIG. 4 is a longitudinal sectional view of a vibration isolating support device according to another embodiment of the present invention, and FIG. FIG. In the figure, parts with the same reference numerals as in FIG. 1 are equivalent parts, so their explanation will be omitted.

The difference between the embodiment shown in FIG. 4 and the embodiment shown in FIG. 1 is as follows.
This is the configuration of the cylinder 3A.

In FIG. 4, the cylindrical body 3A is formed by sequentially overlapping a plurality of cylinders having different lengths and diameters, so that the wall thickness (plate thickness) of the cylindrical body changes. That is, the first cylinder 3-1 has a length from the free end to the fixed end.
A second cylinder 3-2 having an inner diameter that can fit into the outer diameter of the cylinder and a length shorter than the first cylinder 3-1 is fitted, and then a second cylinder 3-2 is fitted into the outer diameter of the second cylinder 3-2 and the inner diameter of the cylinder is smaller than the first cylinder 3-1. , second cylinder 3-2
A fourth cylinder 3 whose length is shorter than that of the third cylinder 3-3 and has an inner diameter that can be fitted into the outer diameter of the third cylinder 3-3. -4 is fitted, and in this way, the wall thickness of the cylinder 3A increases from the free end to the fixed end.

By doing this, the same effects as in the previous embodiment can be expected, and the combined cylinders rub against each other during deformation, thereby dissipating vibration energy.

In the example shown in Fig. 4, the plate thickness was changed by sequentially stacking one cylinder on the outside so that the stress distribution approaches an equal stress distribution for one bend, but the same effect can be obtained even if the cylinders are stacked on the inside. . An example thereof is shown in FIG.

As shown in FIG. 5, the cylindrical body 3B is formed by sequentially overlapping a plurality of cylinders having different lengths and diameters inside.

The above-mentioned examples show examples in which vertical loads are applied to piping, but horizontal thermal loads, earthquake loads, etc. can also be handled by installing the device in the same way in the horizontal direction. , can support piping. By attaching the device in this way, it is possible to support the piping three-dimensionally.

Further, in each of the above-described embodiments, powder was enclosed inside the cylinder, but the same effect can be obtained even if a compressible viscous body is enclosed.

〔Effect of the invention〕

As described above, according to the present invention, thermal elongation of supported objects such as piping is allowed, and external force energy is absorbed in response to excessive loads during earthquakes. It is possible to provide a vibration-proof support device that is low in cost, highly reliable, and maintenance-free.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a vibration isolating support device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II in FIG. A conceptual diagram, FIG. 4 is a vertical sectional view of a vibration isolating support device according to another embodiment of the present invention, and FIG. FIG. 3.3A, 3B...Cylinder, 3-1.3-2.3-3゜3-4...Cylinder, 4...Powder, 6...Rod, 7
...Piping Fig. 2 γ 3 Fig. 3 Fig. 5

Claims (1)

[Scope of Claims] 1. In a vibration isolating support device that is fixed to a supporting fixed side and connected to a supported body through at least a clamping means, a flow with little volume change is provided in a cylinder constituting the vibration isolating support device. A vibration-proof support device characterized by enclosing a substance. 2. The anti-vibration device according to claim 1, characterized in that the cylinder has a wall thickness that changes in the longitudinal direction of the cylinder so that the stress in each part of the cylinder is uniform. Support device. 3. A vibration-isolating support device according to claim 2, characterized in that the wall thickness of the cylinder body is changed by sequentially overlapping a plurality of cylinders having different lengths and diameters.