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Rapid cut-off valve for regenerative extraction steam pipeline of steam turbine

A technology of regenerative steam extraction and steam turbine, applied to valve details, valve devices, mechanical equipment, etc., can solve problems such as difficult maintenance, jamming, and easy-to-corrosion pipelines, and achieve the effects of sensitive and reliable control, compact structure, and easy maintenance

Active Publication Date: 2011-09-14
SHENYANG NORTHEAST ELECTRIC POWER CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the system uses water source, it has the following defects: 1. It needs an external hydraulic station, the system is huge and difficult to maintain; 2. Water is easy to corrode pipelines, rust, and easily cause jamming, which affects the reliability of the system

Method used

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  • Rapid cut-off valve for regenerative extraction steam pipeline of steam turbine
  • Rapid cut-off valve for regenerative extraction steam pipeline of steam turbine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] It has an integrated power source 1, a double-rod hydraulic cylinder 2, a transmission mechanism and a valve. The two oil ports of the solenoid valve 3 are connected to C and D, and the electromagnetic reversing valve 3 is integrally fixed on the double-rod hydraulic cylinder, that is, the two oil ports of the solenoid valve 3 are connected to the two oil ports A and B of the double-rod hydraulic cylinder , the transmission mechanism is that the gear 6 meshes with the rack 4, one end of the rack is fixed on the piston 2.1 of the hydraulic cylinder 2, the other end is connected with the spring 5, and the valve shaft is coaxial with the gear 6.

[0013] Normally, the electromagnetic reversing valve is not charged, and the power oil generated by the motor-driven oil pump in the integrated power source drives the piston in the hydraulic cylinder to move, and then compresses the spring to store energy for the spring. When the valve needs to be opened and closed quickly, the ...

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PUM

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Abstract

The invention relates to a quick turn-off valve used in the regenerative extraction tube of turbine, which can solve the problems of present hydraulic executor with large volume and lower reliability. The invention is characterized in that: it has a dual-rod hydraulic cylinder, a transmission device, and a valve; the integrated power source is fixed on the dual-rod hydraulic cylinder; the electromagnetic steering valve is fixed on the dual-rod hydraulic cylinder; the transmission device comprises meshed gear wheel and tooth bar, while one end of tooth bar is fixed on the piston of hydraulic cylinder and another end is connected to the spring; the valve axle is coaxial with the gear wheel. The invention has itself oil source, while the elements are not connected by tube; therefore, it has small volume, light weight, closed system, and quick response speed.

Description

technical field [0001] The invention relates to a fast shut-off valve for controlling fluid flow and pressure, especially a quick shut-off valve used on the steam recovery pipe of a steam turbine unit in a power plant, which can effectively prevent equipment failure caused by steam backflow in the steam turbine set . Background technique [0002] The valve used in the pipeline is used to control the flow and pressure of the fluid in the pipeline, and the device that drives and controls the operation of the valve is called an actuator. The actuator in the quick shut-off valve system of the steam turbine regenerative steam extraction pipeline needs to output a large torque, and its working method mostly adopts the hydraulic type, that is, the water is used as the medium to store energy for the spring through the hydraulic cylinder. The spring releases energy instantaneously, actuating the valve to open or close. Because the system uses water source, it has the following defe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D17/10F01D25/00F16K31/124
Inventor 刘宝军郑学明刘观华
Owner SHENYANG NORTHEAST ELECTRIC POWER CONTROL