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Hydraulic or pneumatic drive for actuating a fitting comprising a control valve or selector valve

A driving device, hydraulic technology, applied in the direction of fluid pressure actuator, fluid pressure actuator system safety, servo motor, etc.

Active Publication Date: 2013-10-23
ROBERT BOSCH GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of such a safety circuit is that each passive logic valve can only be tested together with the active logic valve of the parallel line

Method used

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  • Hydraulic or pneumatic drive for actuating a fitting comprising a control valve or selector valve
  • Hydraulic or pneumatic drive for actuating a fitting comprising a control valve or selector valve
  • Hydraulic or pneumatic drive for actuating a fitting comprising a control valve or selector valve

Examples

Experimental program
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Embodiment Construction

[0059] figure 1 The circuit diagram of the valve arrangement of the hydraulic drive is shown, to which the connections indicated by A1 and B1 are respectively directly connected (in figure 2 and 4 to the working chamber 4, 204 or 6, 206 of the double-acting servo cylinder 2, 202 shown in 8). The servo cylinders 2 , 202 are used to set the corresponding safety valves or regulating valves 1 , 101 , 401 of the valves. Such a regulating valve 1 , 101 , 401 is, for example, a steam valve which, in normal operation, can assume an intermediate position for controlling the steam flow. The valve can also be a distribution valve, which is closed or open during normal operation and which should assume its second position under certain circumstances. Besides steam, it is also conceivable to control the flow of other media, which are transported in the same way or whose parameters are changed (for example by mixing).

[0060] In order to set the regulating valve 1, 101, 401 in normal ...

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Abstract

The invention relates to two variants of a safety circuit for valves actuated hydraulically via a positioning cylinder. In the first variant, the positioning cylinder (2, 202) can be hydraulically or pneumatically depressurized in an emergency. For this purpose, the positioning cylinder has two cylinder chambers (4, 204) which can be fluidically connected via a working line (8a-f, 108a-f, 408a-i). A first and a second series-connected shut-off valve (12, 14) are provided in the working line. According to the second variant, the positioning cylinder can be hydraulically or pneumatically actuated in an emergency. For this purpose, the positioning cylinder has at least one first cylinder chamber, which in an emergency can be supplied with pressurised fluid via a first pressure medium flow path. A first and a second series-connected shut-off valve are provided in the first pressure medium flow path.

Description

technical field [0001] The invention relates to a hydraulic or pneumatic (fluid) drive, which is provided for the actuation of valves with distribution valves or control valves and which comprises actuating cylinders and a safety line in a line With two shut-off valves connected in series with each other, the cylinder chamber of the servo cylinder is connected to the pipeline. Said valves can be used, for example, in power stations, in the chemical or petrochemical industry, in oil and gas delivery, etc. Valves such as auxiliary controlled safety valves, quick closing valves, quick opening valves, control valves, quick closing valves, auxiliary valves, isolating valves for inherent media control in power stations, for mixing materials of the same or other types valve and so on. Background technique [0002] From DE-AS 2 025 836 there is known a hydraulic safety circuit for a double-acting hydraulic cylinder with two pressure chambers, for which the two pressure The chambe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B20/00
CPCF15B2211/7054F15B2211/329F15B20/008F15B2211/8757F15B2211/315F15B2211/8636F15B11/00F15B20/00F15B13/0405F15B15/20
Inventor H-J.芬克M.布林克曼D.布拉赫特
Owner ROBERT BOSCH GMBH
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