JPH0226389A - Earthquake-proof supporter - Google Patents

Abstract

PURPOSE:To enable damping force to be regulated freely by supporting one side of a bellows to a line or the like through an upper portion block member and a connecting member and providing a hole in a lower portion block member on the other side and as well providing a fluid flow regulating valve. CONSTITUTION:It is an earthquake-proof supporter for absorbing the vibrational energy of a line 1 or the like, and it is formed with block members 3, 4, a flow regulating valve 6 and the like. On one side of a bellows 5, an upper portion block member 3 for blocking it is provided so as to be supported to the line 1 or the like through a connecting member 2. On the other side of the bellows 5, a lower portion block member 4 for blocking it is attached on a fixed portion. A hole 9 leading to the inside of the bellows 5 is provided in the lower portion block member 4, and a valve 6 or a plate which regulates the quantity of in/outflow of fluid is formed on the hole 9. As a result, maintenance inspection is hardly needed and as well damping force can be regulated freely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] This invention relates to an earthquake-resistant support device for piping, etc. used in nuclear power plants, thermal power plants, etc.

[Conventional technology]

FIG. 3 is a longitudinal cross-sectional view of an oil snubber, which is a conventional seismic support device. In the figure, 12 is a rod whose left end is connected to a pipe, etc., 13 is a seal portion, 14 is an oil snubber body, 15 is a piston, 1B is a plurality of through holes installed in the piston 15 through which the liquid medium 17 passes.

Next, the effect will be explained. In the above configuration, when the rod 12 receives an external force in the right direction, the piston 1 inside the oil snubber body 14 connected to the rod 12
5 is also pushed to the right, causing the liquid medium 17 on the right side of the piston 15 to
moves to the left chamber of the piston 15 through the piston through hole IB. At this time, the vibration energy is absorbed by the liquid friction generated between the piston through hole 16 and the liquid medium 17. Note that even when the rod 12 receives an external force in the left direction,
The liquid medium 17 flows into the piston through hole 1B in the opposite direction to the above.
A similar effect occurs due to the fluid friction generated when passing through the

[Problem to be solved by the invention]

Conventional seismic support devices are constructed as described above, but they have drawbacks such as deterioration and damage to seals, oil leaks, sticking and wear of sliding parts, and also the inability to freely adjust damping force. There was a problem.

This invention was made in order to solve the above-mentioned problems, and can have a structure without oil seals on the sliding parts, requiring almost no maintenance and inspection, and can freely rtrvn the damping force. The purpose is to obtain an earthquake-resistant support device.

[Means to solve the problem]

The seismic support device according to the present invention has a closing member attached to one end of the bellows, a plate with a hole attached to the other end, and a flow rate control valve or a flow rate control plate installed in the hole of the plate.

[Effect]

The seismic support device of the present invention uses bellows to absorb vibration energy of piping, etc., and controls the flow rate of surrounding fluid flowing into or out of the bellows using a flow rate control valve or a flow rate control plate that serves as an orifice. Adjust the damping force by adjusting the pressure.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
In the figure, 1 is a pipe to be supported, 2 is a member connecting this pipe 1 and an upper closing member 3 attached to one end of the bellows 5, 4 is a lower closing member attached to the other end of the bellows 5, and 6 A flow control valve is connected to a through hole 9 provided in the lower closing member 4, 7 is a support member, and 8 is a structure.

Next, the effect will be explained. In FIG. 1, when the piping 1 receives an external force in the right direction due to an external force such as an earthquake, the external force is transmitted to the bellows 5 via the connecting member 2. When subjected to an external force as described above, the bellows 5 is compressed, and the liquid surrounding the device sealed within the bellows 5 tends to be discharged to the outside through the through hole 9 provided in the lower closing member 4. At this time, the flow rate regulating valve 6 attached to the lower closing member 4 and communicating with the hole 9 serves as an orifice.
It prevents the fluid in the bellows 5 from suddenly flowing out, and
absorbs vibration energy.

In addition, since the fluid inside and outside the bellows 5 is the same, the flow rate flowing into or out of the bellows 5 can be adjusted depending on the environmental conditions in which the seismic support device is installed, the magnitude and cycle of external forces such as earthquakes, etc. The damping force can be adjusted by adjusting the valve 6.

In the above embodiment, the flow rate adjustment valve 6 is provided to adjust the damping force, but as shown in FIG.
may be used, and the same effect as in the above embodiment can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, since it is composed of a bellows and a flow rate control plate provided with a flow rate control valve or an orifice, it is possible to obtain a device with a simple structure without oil seals on sliding parts. Since it requires almost no maintenance and inspection, it has an excellent effect in that it can be installed even under environmental conditions such as nuclear power plants.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view showing an earthquake-resistant support device according to an embodiment of the present invention, FIG. 2 is a cross-sectional side view showing another embodiment of the invention, and FIG. 3 is a cross-sectional side view showing an oil snubber that is a conventional earthquake-resistant support device. FIG. In the figure, 1 is a pipe, 2 is a connecting member, 3 is an upper closing member, 4
is a lower closing member, 5 is a bellows, 6 is a flow rate adjustment valve,
7 is a support member, 8 is a structure, 9 is a hole, 10 is a flow control plate, and 11 is an orifice. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] A lower closing member that closes one side of the bellows is attached to the fixed part, an upper closing member that closes off the other side of the bellows is configured to support piping, etc. through a connecting member, and the lower closing member has a portion inside the bellows. An earthquake-resistant support device, characterized in that a communicating hole is provided, and the hole is provided with a flow rate regulating valve or a flow rate regulating plate for fluid flowing out or flowing in from the bellows.