| 摘要 |
<p>PROBLEM TO BE SOLVED: To make a bladder of an inexpensive material and to simplify its structure by forming an orifice hole in the bladder for dividing a shell empty chamber into a port flow-in chamber and an orifice flow-in chamber, the orifice hole being for communicating both chambers. SOLUTION: An empty chamber 5 in a shell 2 is divided into an orifice flow-in chamber 19 and a port flow-in chamber 20 by a bladder 14 and an orifice hole 18 for communicating the orifice flow-in chamber 19 and the port flow-in chamber 20 to each other is formed in the bladder 14. The material of the bladder 14 is a resin or rubber and gas transmissivitiy is not a problem. An impact pressure produced in a piping line is caused to flow into the port flow-in chamber 20, the bladder 14 is pressed to the orifice flow-in chamber 19 and simultaneously a fluid is caused to flow from the orifice hole 18 into the orifice flow-in chamber 19. The moment the pressure of the port flow-in chamber 20 becomes smaller than that of the orifice flow-in chamber 19, the fluid of the orifice flow-in chamber 19 is caused to flow out through the orifice hole 18 to the port flow-in chamber 20 side. By repeating this operation, an impact face is absorbed. Thus, a shape is made small and an inexpensive material is provided.</p> |
