Valve, energy conversion device/fluid distribution network including valve and method of disassembling valve

Abstract

This valve (2) is integrated into a fluid distribution network and enables selective interruption or authorization of the circulation of a fluid; it includes a fluid blocking member driven in rotation by an actuator device of the valve and at least one journal (20), a hollow body (24) inside which the blocking member (22) is mobile and which defines at least one bore (A26) for receiving the journal (20), and a bearing (31) disposed around each journal (20) and inside the bore (A26) of the body (24) enabling support of the journal (20) and guidance thereof in rotation relative to the bore (A26), thereby centering the journal (20). The valve (2) further includes a device (30) for immobilizing and sealing for maintenance the journal relative to the body (22) of the valve (2), this immobilization device (30) being on the same side of the bearing (31) as the internal volume (V24) of the hollow body (24) and being maneuverable via the bearing (31) to go from a non-clamped first configuration to a clamped second configuration in which it immobilizes the journal (20) in the bore (A26) and vice versa.

Description

technical field [0001] The invention relates to a valve which, in the configuration of use, is integrated into a fluid distribution network, in particular on the upstream side of a hydraulic machine, and which is capable of interrupting or permitting the flow of fluid in a pipe in a controlled manner. A hydraulic machine means a turbine, a pump or a turbine-pump. Background technique [0002] Such valves include a component for blocking fluid called an obturator, which is driven in rotation by the valve's actuator to alternately block or permit the passage of fluid. Valves can be of the ball type, where the blocking member called the obturator has a spherical shape, or of the butterfly type, where the obturator is a simple disc. The obturator is journalled to the actuating means of the valve, enabling the transmission of rotational movement. The journal is thus in a receiving bore in the valve body. In addition, smooth bearings are used to support, guide and center each b...

AI Technical Summary

Problems solved by technology

This has the disadvantage that access to the fluid on the upstream side of the valve in the pipe must be cut off, and therefore the supply of the other hydraulic machines of the plant must be stopped

This can lead to eccentricity of the journal and thus the obturator, and can thus lead to leakage during maintenance operations which poses a danger to personnel

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