Anti-shock position feedback device for blower anti-surge regulating valve

Abstract

The invention provides an anti-quake position feedback device for an air blower anti-surge regulating valve. The anti-quake position feedback device for the air blower anti-surge regulating valve comprises a valve plate mounted in an air outlet pipeline, a cylindrical driving rod connected with the valve plate and an actuating mechanism connected with the cylindrical driving rod. The anti-quake position feedback device for the air blower anti-surge regulating valve is characterized in that a gear rod is fixedly connected to the upper part of the cylindrical driving rod, and a gear wheel is connected to the gear rod; the gear wheel is connected to a main pushing rod through a rack, and the main pushing rod is connected to an auxiliary pushing rod through an anti-quake flexible connecting device; the auxiliary pushing rod is connected to a piston arranged in a sealing cavity, and the sealing cavity is connected to a pressure transmitter through a pressure pipe; and pressure conducting media are arranged in the sealing cavity body. According to the anti-quake position feedback device for the air blower anti-surge regulating valve, the problem that a control system is unstuck due to the fact that an angular displacement transmitter is prone to being damaged under the circumstance that the vibration environment is too great is solved; and meanwhile, by designing a signal retaining circuit, the normality of the control system is ensured when the feedback signal output fails.

Description

Technical field: [0001] The invention relates to an anti-shock position feedback device for an anti-surge regulating valve of a blower, and belongs to the technical field of electric instrument control. Background technique: [0002] At present, the hydraulic butterfly valve used in the blast furnace steam blower anti-surge adjustment system has the function of adjusting the opening and quick opening. Its driving source is high-pressure anti-fuel oil. The signal is converted into a hydraulic signal to directly drive the valve action. The position feedback is to convert the angular displacement of the butterfly valve into an electrical signal through the FISHER4210 position transmitter and send it to the VOITH position valve control circuit for comparison operation. Therefore, once the position feedback signal fails, the VOITH position valve The internal operation is relatively invalid, and the position valve cannot output normal control signals to drive the valve action. Wh...

AI Technical Summary

Problems solved by technology

[0002] At present, the hydraulic butterfly valve used in the blast furnace steam blower anti-surge adjustment system has the function of adjusting the opening and quick opening. Its driving source is high-pressure anti-fuel oil. The signal is converted into a hydraulic signal to directly drive the valve action. The position feedback is to convert the angular displacement of the butterfly valve into an electrical signal through the FISHER4210 position transmitter and send it to the VOITH position valve control circuit for comparison operation. Therefore, once the position feedback signal fails, the VOITH position valve The internal calculation is relatively invalid, and the position valve cannot output normal control signals to drive the valve action

When the blast furnace blower is in the air release operation, the anti-surge valve vibrates greatly on site, and the angular displacement transmitter is damaged by the shock many times, and the electrical signal fails, which directly leads to the failure phenomenon that the valve cannot be controlled, seriously affecting the normal air supply to the blast furnace

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