Inlet ball valve hydraulic pressure control system

A technology of hydraulic control system and water inlet ball, which is applied in the direction of valve details, valve devices, fluid pressure actuation devices, etc., and can solve problems such as difficult adjustment, working seal, maintenance seal hydraulic lock spindle exit, complex operation, equipment damage, etc. , to prevent damage to the lock spindle or servomotor

CN108194688APending Publication Date: 2018-06-22四川海纳恒太科技工程有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-06-22

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Abstract

The invention discloses an inlet ball valve hydraulic pressure control system. The system comprises seal and locking control oil line and ball valve valve-controlled oil line, and has functions that the system has full hydraulic and mechanical latch protection, when the valve is closed, working seal is automatically put into operation. The seal and locking control oil line comprises that control oil sources pass through a branch oil line of a maintenance seal holding valve to a locking input hydraulic control valve, and the control oil sources are connected with a locking device through a hydraulic pressure locking magnetic valve; the control oil sources pass through a working seal operational valve and a maintenance seal operational valve and are respectively connected with the working seal and a maintenance seal, and a shuttle valve is connected with a working seal priority valve, the locking input hydraulic control valve and the working seal operational valve. The ball valve valve-controlled oil line comprises the steps that the a servomotor opens a cavity oil line and guides a branch oil line to pass through an oil supplementary pressure maintaining combination valve to a pressure compensation oil line of a main operating valve opening valve side control oil port; the maintenance seal locking valve, a working seal locking valve and a hydraulic pressure locking holding valveare arranged between the control oil sources to the opening valve magnetic valve in turn to form a locking oil line; others are motion oil lines.
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Description

technical field

[0001] A water inlet ball valve hydraulic control system is used to control the opening and closing of a water inlet ball valve, and belongs to the technical field of water inlet ball valve hydraulic control systems. Background technique

[0002] The water inlet valve arranged between the water diversion penstock of the hydropower station and the inlet section of the volute of the turbine is used for the normal operation of the turbine and the safety of the power station, and is an important protection device for the operation and maintenance of the power station. When the unit is overhauled or shut down normally if the guide vane leaks a lot, the water inlet valve should be closed. Normally, the water inlet valve is operated under the condition of pressure balance (the guide vane of the turbine is closed, and the upstream and downstream sides of the water inlet valve pass through the bypass valve or exit the bypass pressure in the working seal). In an emerg...

Examples

Embodiment Construction

[0053] All the features disclosed in this specification, except mutually exclusive features and / or steps, can be combined in any way.

[0054] As shown in the figure, the water inlet ball valve of the water inlet ball valve hydraulic control system is an oil-sealed structure, and the ball valve is in the fully closed position. In the figure, the working seal and hydraulic locking spindle are all in the input position, and the bypass valve is in the fully closed position. The maintenance seal is in the withdrawn state. This system includes the seal and spindle lock control oil circuit, the ball valve valve control oil circuit matched with the seal and spindle lock control oil circuit, and the optional bypass valve control oil circuit;

[0055] Sealing and spindle lock control oil circuit includes control oil source, inspection and maintenance seal lock valve HV02, lock input hydraulic control valve HV06, hydraulic lock spindle solenoid valve SV04, shuttle valve V503, working sea...