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Device and method for steam turbine AST solenoid valve fault real-time monitoring alarm

A real-time monitoring and alarm device technology, applied in the field of energy and power, to ensure normal operation, improve system stability, and improve reliability

Pending Publication Date: 2018-03-16
DATANG BINZHOU POWER GENERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of AST solenoid valve fault monitoring in the prior art, the present invention provides a real-time monitoring and alarming device and method for AST solenoid valve faults of steam turbines

Method used

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  • Device and method for steam turbine AST solenoid valve fault real-time monitoring alarm
  • Device and method for steam turbine AST solenoid valve fault real-time monitoring alarm
  • Device and method for steam turbine AST solenoid valve fault real-time monitoring alarm

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Effect test

Embodiment 1

[0032] combined with Figure 1-4 , a steam turbine AST solenoid valve fault real-time monitoring and alarm device of the present embodiment includes a fault monitoring circuit, the fault monitoring circuit is located at the top of the AST solenoid valve 1, and the fault monitoring circuit is connected to the control system.

[0033] After the fault monitoring circuit detects that the AST solenoid valve 1 is faulty and power-off and closed, the feedback signal is sent to the control system, and the control system sends out an alarm. It was found that the AST solenoid valve 1 was faulty to make the steam turbine run normally. In the prior art, complex circuits are usually installed at both ends of the AST solenoid valve 1 to detect changes in its voltage or current to detect whether the AST solenoid valve 1 is faulty and power-off. Factors such as vibration and circuit failure during operation will inevitably affect the normal operation of the circuit, and the low reliability w...

Embodiment 2

[0035] A kind of steam turbine AST solenoid valve failure real-time monitoring alarm device of this embodiment is further improved on the basis of embodiment 1, such as Figure 1-4 , the AST solenoid valve 1 includes a spring, a valve body 11, a valve core 12, a spring 13 and an orifice 14, the orifice 14 is located at the bottom of the valve body 11, and the spring, the spring 13 and the valve core 12 are all located in the valve body One side of the spring 13 is provided with a spool 12 , the other side of the spring 13 is provided with a nut outside the valve body 11 , and the orifice 14 communicates with the through hole where the spring 13 and the spool 12 are located. The AST solenoid valve 1 is turned off after being energized to maintain normal oil pressure and ensure the normal operation of the steam turbine.

Embodiment 3

[0037] A kind of steam turbine AST solenoid valve failure real-time monitoring alarm device of this embodiment is further improved on the basis of embodiment 1 or 2, such as Figure 1-4 , the control system is provided with a magnetic detection and alarm circuit, and the fault monitoring circuit is connected to the magnetic detection and alarm circuit.

[0038] When the AST solenoid valve 1 fails, the fault monitoring circuit sends a signal to the magnetic detection and alarm circuit of the control system, and an alarm is issued through the magnetic detection and alarm circuit, and the staff in the central control room where the control system is located immediately go to the scene to repair the AST solenoid valve 1 Or replace it, so that the failure of AST solenoid valve 1 can be found in time to prevent the steam turbine from stopping abnormally.

[0039]The magnetic detection and alarm circuit is located in the central control room, which can be in the form of software, for...

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Abstract

The invention discloses a device and method for steam turbine AST solenoid valve fault real-time monitoring alarm and belongs to the technical field of energy power. The device includes a fault monitoring circuit which is located at the top of an AST solenoid valve, the fault monitoring circuit is connected with a control system and is used to monitor a state of the AST solenoid valve creatively through the fault monitoring circuit having no connection relationship with the AST solenoid valve, and the reliability is greatly improved. Against the AST solenoid valve fault monitoring problems inthe prior art, according to the device and the method, whether the AST solenoid valve is subjected to wire breakage and fault burndown and the like which lead to outage can be detected in real time through magnetic force on the conditions of no adding of an AST solenoid valve loop device, to timely maintain or replace the AST solenoid valve and ensure that a steam turbine runs normally.

Description

technical field [0001] The invention belongs to the technical field of energy and electric power, and in particular relates to a real-time monitoring and alarming device and method for a steam turbine AST electromagnetic valve failure. Background technique [0002] AST is the emergency shutdown protection of the steam turbine, which is realized through four AST solenoid valves. When a certain parameter of the steam turbine reaches the shut-down value, the AST solenoid valve is de-energized and opened to drain the safety oil, and the steam valves of the steam turbine are quickly closed and shut down. The four AST solenoid valves are divided into two groups, one channel and two channels respectively, which can prevent both false operation and refusal to operate, such as figure 1 It is the layout diagram of the AST and OPC solenoid valve blocks of the steam turbine. The solenoid valve for tripping of the steam turbine is in the right frame of the figure. During normal operatio...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/327
Inventor 贾长武
Owner DATANG BINZHOU POWER GENERATION CO LTD
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