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

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 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 t...

Example Embodiment

[0034] Example 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.

Example Embodiment

[0036] Example 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 f...

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PUM

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Abstract

The invention discloses a steam turbine AST electromagnetic valve failure real-time monitoring and alarming device and method, belonging to the technical field of energy and electric power. Including a fault monitoring circuit, the fault monitoring circuit is located at the top of the AST solenoid valve, the fault monitoring circuit is connected to the control system, and creatively used to monitor the AST solenoid valve through the fault monitoring circuit that has no connection relationship with the AST solenoid valve state, greatly improving reliability. Aiming at the problem of AST solenoid valve fault monitoring in the prior art, it can indirectly detect in real time through magnetic force whether the AST solenoid valve is disconnected, burned, etc. causing power failure and opening without adding AST solenoid valve circuit equipment, and can be repaired in time Or replace the AST solenoid valve to ensure the normal operation of the steam turbine.

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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