Pressure accumulator

Abstract

An accumulator installed in the piping of equipment and temporarily accumulating a pressure in a pipe flow path or absorbing, by a pump, the pulsation of a fluid pressure generating in the piping, whereby the durability of the bladder (3) against a repeated bending and stretching operation in the low temperature environment of 0 DEG or below can be increased and the volume of cushion gas in a gas chamber can be effectively prevented from decreasing, wherein a bladder (3) is formed in a laminated structure having, for example, a center elastic layer (321), gas shielding layers (322) on the outside thereof, external elastic layers (323) on the outside of the gas shielding layers and the center elastic layer (321), gas shielding layers (322), and external elastic layers (323) are formed of polyamide resin, and the gas shielding layers (322) are formed so that the bending elastic modulus thereof is higher than the bending elastic moduli of the center elastic layers (321) and external elastic layers (323).

Description

technical field [0001] The present invention relates to an accumulator installed on piping of equipment to temporarily store the pressure in the piping flow path or absorb the pulsation of the fluid pressure in the piping caused by a pump or the like. Background technique [0002] An accumulator that absorbs hydraulic pulsations that occur in hydraulic piping, etc., consists of a case that is branched to the aforementioned hydraulic piping through a nozzle, and a membrane-shaped diaphragm body that divides the inner space of the case into a pressure guide chamber on the side of the aforementioned nozzle. In the gas chamber on the opposite side, the hydraulic pulsation in the piping is introduced into the pressure guiding chamber through the fluid inlet and outlet of the aforementioned oil nozzle, and the diaphragm body fills the hydraulic pressure of the aforementioned pressure guiding chamber and serves as a buffer gas from the gas filling hole of the casing into the gas cha...

AI Technical Summary

Problems solved by technology

Although the above-mentioned existing technology can exhibit good gas barrier performance in the temperature range from normal temperature to 80°C, in a low temperature environment below 0°C, due to the softness of the gas barrier layer 102 formed of ethylene-vinyl alcohol copolymer Therefore, the load on the gas barrier layer 102 is increased due to repeated flexion and extension deformation, and there is a problem that the gas barrier performance is damaged due to cracks or peeling.

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