| 摘要 |
<p>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.</p> |
