Pressure accumulator

Patent metadata

Field	Value
Publication number	US-2016258449-A1
Application number	US-201515036438-A
Country	US
Kind code	A1
Filing date	Jan 13, 2015
Priority date	Feb 1, 2014
Publication date	Sep 8, 2016
Grant date	—

Abstract

A pressure accumulator comprises an accumulator housing ( 2 ) in which a movable separating element ( 30 ) fluid-tightly separates a gas chamber ( 16 ) filled with a working gas from a fluid chamber ( 28 ). The pressure accumulator is characterized in that a monitoring device ( 50, 54 ) is provided which supplies an optical signal in the event of a malfunction affecting the sealing effect of the separating element ( 30 ).

First claim

1 . A pressure accumulator, having an accumulator housing ( 2 ), in which a movable separating element ( 30 ) separates a gas chamber ( 16 ) filled with a working gas from a fluid chamber ( 28 ) in a fluid-tight manner, characterized in that a monitoring device ( 50 , 54 ) is provided, which supplies a visually noticeable signal in the event of a disruption that adversely affects the sealing effect of the separating element ( 30 ).

2 . The pressure accumulator according to claim 1 , characterized in that it includes a folding bellows as a separating element, in particular, in the form of a metal bellows ( 30 ).

3 . The pressure accumulator according to claim 1 , characterized in that the monitoring device includes a viewing window ( 50 ) on the wall of the housing ( 2 ), through which an indicator ( 54 ) is preferably observable, which is connected to the gas chamber ( 16 ) and the optical properties of which noticeably change when wetted with fluid.

4 . The pressure accumulator according to claim 1 , characterized in that an indicator ( 54 ) is provided, which changes its color when wetted.

5 . The pressure accumulator according to claim 1 , characterized in that a sample quantity of glass-fiber wool ( 54 ) is provided as an indicator, which is white in the unwetted state, and which becomes noticeably discolored in various ways when wetted with fluids of various types.

6 . The pressure accumulator according to claim 1 , characterized in that the glass-fiber wool ( 54 ) is disposed in a bore ( 44 ) passing through the wall of the housing ( 2 ) to the gas chamber ( 16 ).

7 . The pressure accumulator according to claim 1 , characterized in that the bore ( 44 ) is closed on the housing outer side ( 8 ) by a threaded insert ( 46 ), which includes a pressure-resistant viewing window ( 50 ).

8 . The pressure accumulator according to claim 1 , characterized in that the glass-fiber wool ( 54 ) is disposed in the bore ( 44 ) between the threaded insert ( 46 ) that includes the viewing window ( 50 ) and a screen body ( 52 ) located at the inner end of the bore ( 44 ).

9 . The pressure accumulator according to claim 1 , characterized in that the bore is designed as a continuous threaded bore ( 44 ), to the inner end of which a threaded ring ( 48 ), which forms the holder for the screen body ( 52 ), may be screw-fastened.

10 . The pressure accumulator according to characterized in that it includes a cylindrical housing ( 2 ) having a housing cover ( 8 ) that forms an axial housing closure, in which the bore ( 44 ) of the monitoring device is embodied.

Assignees

• Hydac Technology Gmbh

Inventors

• Lehnert Markus

Classifications

• F15B1/103 Primary

  the separating means being bellows · CPC title

• F15B2201/50

  Monitoring, detection and testing means for accumulators · CPC title

• F15B2201/3153

  the flexible separating means being bellows · CPC title

• F15B2201/205

  using gas · CPC title

• F15B2201/3152

  the flexible separating means being bladders · CPC title