Accumulator

Abstract

An accumulator provided with an emergency safety mechanism capable of being activated at a pressure lower than the pressure in the case in which a stay is provided with a rupture plate. In order to achieve the object, an accumulator comprises: an accumulator housing; a stay having a liquid inlet / outlet provided in the end surface of the tip of a stepped tubular section of the stay; a bellows equipped with a bellows cap; a safety mechanism provided in preparation for pressure reduction; and an emergency safety mechanism configured in such a manner that, in an emergency such as occurrence of a fire, the bellows cap or a member held by the bellows cap is caused to press the stay by the pressure in the housing, said pressure being high due to the occurrence of a fire, to cause the stay to be buckled at the step, opening a liquid chamber. A thin-walled section is provided at a circumferential part of the step of the stay so that, in an emergency, the end surface of the stay can easily tilt when the stay is pressed by the bellows cap to be buckled at the step.

Description

technical field [0001] The invention relates to an accumulator used as a pressure accumulator or a pulsation pressure attenuation device or the like. The accumulator of the present invention is used, for example, in hydraulic piping and the like in vehicles such as automobiles. Background technique [0002] Since before, as Figure 11 As shown, there is known an accumulator 51 having a structure in which an energy accumulator is provided with an oil injection port 53 connected to a pressure piping (not shown) and a gas sealing port 54 via a bellows 55 with a bellows cover 56 . The inner space of the device housing 52 is divided into a gas chamber 57 filled with gas and a liquid chamber 58 connected to the oil nozzle 53. The bellows cover 56 moves in such a way that the gas pressure and the liquid pressure are balanced, and the expansion and contraction of the bellows 55 , and perform a pressure accumulation operation or a pulsation pressure attenuation operation (refer to P...

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art described above, as described above, since the emergency safety mechanism 62 is composed of the rupture plate 61d partially provided on the peripheral surface of the support cylinder 61 on the circumference, the rupture pressure is relatively high (requiring The large pressure to the extent that the metal plate is broken), so there is a discomfort that the emergency safety mechanism 62 will not operate when a considerable high pressure cannot be reached.

In addition, it is conceivable to provide a fusible plug or a valve instead of the rupture plate 61d, but in the fusible plug, the plug itself will not operate unless it reaches a high temperature, and in the valve, due to its mechanical structure, it will not be activated in an emergency. Mis-opening the valve (misoperation)

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