Novel valve hall plugging structure and anti-explosion checking method

Abstract

The invention discloses a novel valve hall plugging structure and an anti-explosion checking method, and relates to the field of direct-current power transmission. The structure is used for enhancingthe fireproof and anti-explosion capacity of a firewall between a converter transformer and a valve hall; the structure comprises a first plug and a second plug, a converter transformer sleeve on theconverter transformer side penetrates through the first plug and extends to the valve hall side, and the second plug is arranged on the contact surface of the converter transformer sleeve and the first plug; the first plug comprises a buffer energy absorption layer, an explosion-proof steel plate layer and a fireproof layer which are sequentially connected from the converter transformer side to the valve hall side; and the second plug comprises a ceramic silicone rubber waterproof sealing sleeve used for being arranged on the converter transformer sleeve in a sleeving mode and an aluminum silicate fiber needled blanket arranged between the contact faces of the converter transformer sleeve and the first plug in a filling mode. The method is used for anti-explosion checking of the structure,the deformation amount of the blocking structure is small under the impact of explosive force, and the interior of the blocking structure can still be protected under the condition of explosive impact loads.

Description

technical field [0001] The invention relates to the field of direct current transmission, in particular to a novel valve hall sealing structure and an anti-explosion checking method. Background technique [0002] The converter substations are arranged adjacent to the valve hall, and a firewall is set between the converter substation and the valve hall, and the valve side bushing of the converter converter is inserted into the valve hall through the opening on the firewall. After the converter transformer is installed in place, the opening needs to be sealed to meet the operating requirements of the valve hall. [0003] The active fire of the converter is usually caused by the temperature rise of the internal fault of the converter, especially the arc heating, the temperature can reach thousands of degrees, and the insulating oil is cracked into combustible gas. Large stress is formed inside the rheological oil tank body, which causes the oil-filled shell of the rheological ...

AI Technical Summary

Problems solved by technology

[0004] At present, the original single-layer fireproof panel structure does not have a special anti-explosion structure. It has also been shown in actual fire cases that the current single-layer fireproof panel structure cannot resist these explosion impact forces.

These explosions usually occur at the same time as the converter fire, so the single-layer fireproof panel structure may be damaged by the explosive force and lose its fireproof ability when the fire occurs

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