CN202673555U

CN202673555U - Electrohydraulic follow-up device for water turbine control system

Info

Publication number: CN202673555U
Application number: CN2012202529073U
Authority: CN
Inventors: 汪晓兵; 刘伟; 周松萍; 戴凯; 兰骞
Original assignee: HNAC Technology Co Ltd
Current assignee: HNAC Technology Co Ltd
Priority date: 2012-05-31
Filing date: 2012-05-31
Publication date: 2013-01-16
Anticipated expiration: 2022-05-31

Abstract

The utility model discloses an electrohydraulic follow-up device for a water turbine control system. The electrohydraulic follow-up device comprises a mounting block, a control valve, an emergency shutdown valve, a cartridge valve, a double-and-single-way throttle valve, a hydraulic control one-way valve, and connecting pipelines among the parts. The control valve, the emergency shutdown valve, the cartridge valve, the double-and-single-way throttle valve, the hydraulic control one-way valve are mounted on the mounting block. The electrohydraulic follow-up device is adaptive to the water turbine control system 1800kg*m-10000kg*m in speed control power and 16MPa in oil pressure. Small fluctuation of regulation, large fluctuation of regulation, emergency shutdown and the like of the water turbine control system can be achieved, the electrohydraulic follow-up device is simple in structure, widely applicable, reliable to operate and convenient to maintain, and requirements of a power station for operation are completely met.

Description

A kind of hydraulic turbine control system electrohydraulic follow-up device

Technical field

The utility model relate to a kind ofly be adapted to speed governing merit 1800kgm ~ 10000kgm, the oil pressure grade is the electrohydraulic follow-up device of the hydraulic turbine control system of 16MPa.

Background technique

In the larger hydraulic turbine control system of speed governing merit, electrohydraulic follow-up device generally adopts main control valve to come amplified flow, and main control valve is non-standard product, and high, difficult in maintenance, the static fuel consumption of processing request is large; The oil pressure grade that adopts is 6.3MPa and following, needs that oil mass is large, complex structure, cost be high.

Application number is the electrohydraulic follow-up device that 200420086253.7 utility model patent discloses a kind of high-speed switch valve control hydrogovernor, and this device does not have the Flow amplification element, only is adapted to small-sized speed regulator (the speed governing merit is below 1000Kgm).

Summary of the invention

Technical problem to be solved in the utility model is, for prior art deficiency, a kind of hydraulic turbine control system electrohydraulic follow-up device that provide simple in structure, reliability is high, the oil pressure grade is high, standardization level is high.

For solving the problems of the technologies described above; the technological scheme that the utility model adopts is: a kind of hydraulic turbine control system electrohydraulic follow-up device; comprise mounting blocks (10); be installed in the first modulating valve (1) on the mounting blocks (10); emergency stop valve (3); cartridge valve (4; 5; 6); Double throttle check valve (7; 8); Pilot operated check valve (9); the first modulating valve (1) first port; the second port by pipeline respectively with the first Double throttle check valve (8) first ports; the second port is communicated with; the first modulating valve (1) the 3rd port is communicated with the first cartridge valve (6) first ports by pipeline; the first modulating valve (1) the 4th port is communicated with atmosphere by pipeline; the first Double throttle check valve (8) the 3rd port; the 4th port by pipeline respectively with Pilot operated check valve (9) first ports; the second port is communicated with; Pilot operated check valve (9) the 3rd port; the 4th port by pipeline respectively with the second cartridge valve (5) first ports; servomotor (11) is communicated with; the first cartridge valve (6) second ports are communicated with emergency stop valve (3) first ports by pipeline; the second cartridge valve (5) second ports are communicated with the 3rd cartridge valve (4) first ports by pipeline; emergency stop valve (3) second ports are by between the second Double throttle check valve (7) access the second cartridge valve (5) second ports and the 3rd cartridge valve (4) first ports; the second cartridge valve (5) the 3rd port is communicated with the first cartridge valve (6) the 3rd port by pipeline, and the second cartridge valve (5) first ports and the 3rd cartridge valve (4) second ports are respectively by pipeline access servomotor (11).

Be connected to the second modulating valve (2) between described emergency stop valve (3) second ports and the second cartridge valve (5) second ports, the 3rd cartridge valve (4) first ports.

Compared with prior art, the beneficial effects of the utility model are: the utility model compact structure, easy for installation, easy to maintenance, high, the static fuel consumption of oil pressure grade is little, reliability is high.

Description of drawings

Fig. 1 is the utility model one example structure schematic diagram;

Fig. 2 is the utility model one embodiment's three-dimensional structure diagram;

Wherein:

1: the minor swing modulating valve; 2: the great fluctuation process modulating valve; 3: emergency stop valve; 4, the 3rd cartridge valve; 5: the second cartridge valves; 6: the first cartridge valves; 7: the second Double throttle check valves; 8: the first Double throttle check valves; 9: Pilot operated check valve; 10: mounting blocks; 11: servomotor; 12: the shutdown direction.

Embodiment

As depicted in figs. 1 and 2; the utility model one embodiment comprises mounting blocks 10; be installed in the first modulating valve 1 on the mounting blocks 10; emergency stop valve 3; cartridge valve 4; 5; 6; Double throttle check valve 7; 8; Pilot operated check valve 9; the first modulating valve 1 first port; the second port by pipeline respectively with the first Double throttle check valve 8 first ports; the second port is communicated with; the first modulating valve 1 the 3rd port is communicated with the first cartridge valve 6 first ports by pipeline; the first modulating valve 1 the 4th port is communicated with atmosphere by pipeline; the first Double throttle check valve 8 the 3rd port; the 4th port by pipeline respectively with Pilot operated check valve 9 first ports; the second port is communicated with; Pilot operated check valve 9 the 3rd port; the 4th port by pipeline respectively with the second cartridge valve 5 first ports; servomotor 11 is communicated with; the first cartridge valve 6 second ports are communicated with emergency stop valve 3 first ports by pipeline; the second cartridge valve 5 second ports are communicated with the 3rd cartridge valve 4 first ports by pipeline; emergency stop valve 3 second ports are by between the second Double throttle check valve 7 access the second cartridge valve 5 second ports and the 3rd cartridge valve 4 first ports; the second cartridge valve 5 the 3rd port is communicated with the first cartridge valve 6 the 3rd port by pipeline; the second cartridge valve 5 first ports and the 3rd cartridge valve 4 second ports are respectively by pipeline access servomotor 11, emergency stop valve 3 second ports and the second cartridge valve 5 second ports; be connected to the second modulating valve 2 between the 3rd cartridge valve 4 first ports.

The present embodiment oil pressure grade adopts the high oil pressure of 16MPa, and the Flow amplification element is the cartridge valve of standardized product, and speed governing merit accommodation is 1800kgm ~ 10000kgm.

Under normal circumstances, emergency stop valve is failure to actuate, and opened by the first cartridge valve of its control, enters the P mouth of minor swing modulating valve from the pressure oil of oil gear.When the coil electricity of minor swing modulating valve right side, pressure oil enters servomotor start chamber through the P of minor swing modulating valve mouth, B mouth, Double throttle check valve, Pilot operated check valve; The pressure oil in servomotor shutdown chamber is discharged through A mouth, the T mouth of Pilot operated check valve, the first Double throttle check valve, minor swing modulating valve, promotes servomotor toward the action of start direction; When the coil electricity of minor swing modulating valve left side, can promote equally servomotor toward the action of shutdown direction, regulate the first Double throttle check valve, can change the movement speed of servomotor.

During removal of load, the action of the coil electricity of great fluctuation process modulating valve is opened by the second cartridge valve of its control and the 3rd cartridge valve, and pressure oil enters the shutdown chamber of servomotor through the second cartridge valve; The pressure oil in servomotor start chamber discharges through the 3rd cartridge valve, promotes the servomotor quick closedown, regulates the Flow-rate adjustment bolt of cartridge valve, can change the speed of servomotor quick closedown.

During emergency shutdown, the action of the coil electricity of emergency stop valve, the second cartridge valve and the 3rd cartridge valve of emergency stop valve and the control of great fluctuation process modulating valve are opened, and pressure oil enters the shutdown chamber of servomotor through the second cartridge valve; The pressure oil in servomotor start chamber discharges through the 3rd cartridge valve, promotes the servomotor quick closedown.

Claims

1. hydraulic turbine control system electrohydraulic follow-up device; comprise mounting blocks (10); be installed in the first modulating valve (1) on the mounting blocks (10); emergency stop valve (3); cartridge valve (4; 5; 6); Double throttle check valve (7; 8); Pilot operated check valve (9); it is characterized in that; the first modulating valve (1) first port; the second port by pipeline respectively with the first Double throttle check valve (8) first ports; the second port is communicated with; the first modulating valve (1) the 3rd port is communicated with the first cartridge valve (6) first ports by pipeline; the first modulating valve (1) the 4th port is communicated with atmosphere by pipeline; the first Double throttle check valve (8) the 3rd port; the 4th port by pipeline respectively with Pilot operated check valve (9) first ports; the second port is communicated with; Pilot operated check valve (9) the 3rd port; the 4th port by pipeline respectively with the second cartridge valve (5) first ports; servomotor (11) is communicated with; the first cartridge valve (6) second ports are communicated with emergency stop valve (3) first ports by pipeline; the second cartridge valve (5) second ports are communicated with the 3rd cartridge valve (4) first ports by pipeline; emergency stop valve (3) second ports are by between the second Double throttle check valve (7) access the second cartridge valve (5) second ports and the 3rd cartridge valve (4) first ports; the second cartridge valve (5) the 3rd port is communicated with the first cartridge valve (6) the 3rd port by pipeline, and the second cartridge valve (5) first ports and the 3rd cartridge valve (4) second ports are respectively by pipeline access servomotor (11).

2. hydraulic turbine control system electrohydraulic follow-up device according to claim 1; it is characterized in that, be connected to the second modulating valve (2) between described emergency stop valve (3) second ports and the second cartridge valve (5) second ports, the 3rd cartridge valve (4) first ports.