JPS60184736A - Fixed hydraulic vibration insulator - Google Patents

Abstract

PURPOSE:To prevent oil leakage without use of a sealing part and thereby provide the captioned insulator having a simplified structure by constructing a cylinder in an oil case in the captioned insulator for use in piping systems in a power plant. CONSTITUTION:An oil case 1 horizontally fixed on a support S such as a beam of a building has a pair of cylinders 4, 4 provided on both sides thereof below an oil level therein and opening inwardly to each other. A piston body 5 connected with a body to be supported has both ends thereof sealably and slidably inserted respectively into the cylinders 4, whereby permits hydraulic chambers 6 to be formed in the cylinders 4. Oil lines 7 for communicating oil contained in the hydraulic chambers 6 with that contained in the hydraulic case 1 outside the hydraulic chamber 6 are provided in both ends of the piston body 5, and check valves 8 are respectively provided on the middles of said oil lines, each of said check valve serving to open the oil line 7 when an oil flow from the hydraulic chamber 6 to the outside therefrom 6 is slow, while to close the oil line 7 when rapid.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a system for protecting supported bodies such as pipe systems from vibrations caused by l1Liv, etc. at power plants and chemical plants. This is a type of hydraulic vibration isolator that supports the body on a supporting body such as a building beam in an anti-vibration manner, and does not require frequent maintenance and inspection to prevent bending and leakage. Another purpose is to provide a device that has a relatively simple structure and can be obtained at low cost.

An embodiment of the present invention will be explained below with reference to the figures. An oil case 1 containing 0 oil is fixed horizontally on a support S such as a beam of a building. A cover 3 having an opening 2 is placed on the oil case 1.
is installed. A pair of cylinders 4, 4 which face each other inwardly and are open are provided on both sides under the curved surface inside the oil case 1.

Both ends of the bismine book 5 are inserted into the cylinder 4 airtightly and slidably, forming an oil chamber 6 within the cylinder 4. At both ends of the piston body 5, there are oil passages 7 that communicate between each of the 7II chambers 6 and the oil in the oil case 1 outside the oil chamber 6.
are provided, and a check valve 8 is provided at each of these ends. The reversal valve 8 is an oil source from the oil 6 to the outside of the oil chamber 6.
When the flow of l is slow, the oil passage 7 is listened to, but when it is rapid, the oil passage 7 is closed. The piston body 5 has a holding body 9 at its center.
being held by The holder 9 has a bracket 10 that stands upwardly and projects outward from the opening 2, and a connecting portion lA connected to a supported body such as a piping system to the bracket 10.
One end of l1 is pivotally connected. Therefore, the piston body 5 reciprocates horizontally 1li11 in response to the vibration 1tlJ of the supported body.
It shall be.

The sliding cover 12 is fitted into the bracket Q and the cover 3
It is freely slidable and is being attacked.

Next, the effect will be explained. When the piston body 5 moves horizontally against a supported body (not shown), the gd of one of the pistons 6 expands and the gd of the other decreases. The oil in the contracted oil chamber 6 attempts to flow out of the cylinder through the oil passage 7, but a check valve 8 is activated by hydraulic pressure on the platform where the piston body 5 suddenly gasps.
closes, causing relative movement of the piston body 5. This becomes the allocation force of the supported body. On the other hand, the piston body 5 slowly moves relative to the platform where the supported body is slowly displaced due to thermal expansion or the like. Therefore, the oil in the oil chamber 6 is discharged from the oil passage 7 without operating the check valve 8.

Therefore, a necessary and slow displacement of the supported body can be easily tolerated.

As explained above, the present invention provides a piston body connected to a supported body within a pair of cylinders 4 which are provided oppositely in oil on both sides of an oil case 1 fixed to a support body S. 5
An oil chamber 6 is provided in each cylinder 4 by inserting both sides of the piston body 5, and each oil chamber 6 in the cylinder 4 is connected to the oil in the oil case 1 outside the cylinder 4 on both sides of the piston body 5. Oil passage 7
During this song selection @ 7, the check valve 8 that senses the rapid flow of oil from the oil chamber 6 to the outside and closes the oil passage 7 is fired. The oil case 1 has a simple structure and there is no seal, so there is no risk of oil leakage, so no maintenance or inspection work is required, and the overall structure is relatively simple. Therefore, a stationary hydraulic vibration isolator that is easy to manufacture and inexpensive can be obtained.

[Brief explanation of drawings]

Figure 1 is a longitudinal front view, 2+821 is Figure 1 rr -r
3 is a sectional view taken along line III-IN in FIG. 1. 1...Oil case, 4...Cylinder, 5...
Piston body, 6... oil chamber, 7... oil passage, 8...
...Check valve, S...Support (beam). Figure 1 Figure 2 Figure 1

Claims (1)

[Claims] Both sides of the screw body, which is also connected to the body to be supported, are inserted into a pair of cylinders provided with relative distances between both sides of the oil case fixed to the support body. An oil chamber is configured inside the cylinder, and both of the piston body (Ill include each oil chamber inside the cylinder and the inside of the i'111 case outside the cylinder).
This 1141
I felt a rapid leakage of oil to the outside from the bend 3 in the entire passage (stationary type 4↑ equipped with a reverse valve that closes the bend extension toro)
I have 1 child and 1 dragon.