Transmission mechanism-externally-arranged type ceramic double-core adjustable shrinkage cavity

Abstract

The invention belongs to a pipeline system pressure balance adjusting device, and particularly relates to a transmission mechanism-externally-arranged type ceramic double-core adjustable shrinkage cavity. The shrinkage cavity comprises a box body component, a transmission mechanism component, a sealing component and a shrinkage cavity adjusting indicating device, wherein the box body component isprovided with the transmission mechanism component; the transmission mechanism component comprises a lead screw and wear-resistant alloy gate boards, the wear-resistant alloy gate boards comprise a right wear-resistant alloy gate board and a left wear-resistant alloy gate board, the transmission mechanism component controls the right wear-resistant alloy gate board and the left wear-resistant alloy gate board through the lead screw so as to control the size of the shrinkage cavity; and the sealing component is used for sealing a gap between the wear-resistant alloy gate boards and a box body,and the shrinkage cavity adjusting indicating device is arranged on the box body component. The adjustable shrinkage cavity adopts the externally-arranged transmission mechanism which is not in contact with pulverized coal, so that transmission is reliable, and no jamming phenomenon is generated under any case; and in the adjustable shrinkage cavity, the inner surface of a ceramic wear-resistant pipeline is bonded with a ceramic plate so that the wear resistance of a pulverized coal pipeline can be improved, and the purpose of prolonging the service life is achieved.

Description

technical field [0001] The invention belongs to a pressure equalization regulating device for a pipeline system, in particular to a ceramic double-core adjustable shrinkage cavity with an external transmission mechanism. Background technique [0002] In the coal direct blowing combustion system of thermal power plants, the boiler uses pulverized coal as fuel during normal operation, and the combustion in the furnace is tangential combustion at four corners. To ensure that, but because the pipeline layout of the pulverized coal pipeline at the four corners of the boiler is different, the system resistance is also different, so a device for adjusting the system pressure of the pulverized coal pipeline flow is required. This device is called adjustable shrinkage cavity. [0003] At present, most thermal power plants adopt double-core regulation, and there are various structural forms to realize double-core regulation, but there are the following technical problems: [0004] 1 ...

AI Technical Summary

Problems solved by technology

[0004] 1 The material of the core board is not suitable, the core board wears quickly and the service life is short;

[0005] 2. The transmission device is in the pulverized coal pipeline. The pulverized coal will cause the fully sealed ceramic wear-resistant adjustable shrinkage cavity transmission parts to rust or the pulverized coal will cause the transmission part to fail, which is easy to jam and cause the adjustment function to fail.

[0006] 3 Poor sealing performance, easy to leak from the transmission shaft

[0007] 4 When the entire core plate and transmission device are replaced during the overhaul period, the maintenance and repair costs are high

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