Transmission mechanism external ceramic double-core adjustable shrinkage hole

Abstract

The invention belongs to a pressure equalization adjustment device for a pipeline system, in particular to a transmission mechanism external ceramic double-core adjustable shrinkage hole, comprising a box body assembly, a transmission mechanism assembly, a sealing assembly, and a shrinkage hole adjustment indication device, and a transmission mechanism assembly is arranged on the box body assembly. , the transmission mechanism assembly includes a screw rod and a wear-resistant alloy gate, the wear-resistant alloy gate includes a right wear-resistant alloy gate and a left wear-resistant alloy gate, and the transmission assembly controls the right wear-resistant alloy gate and the left wear-resistant alloy gate through the screw rod. The left wear-resistant alloy gate then controls the size of the shrinkage hole. The sealing component is used to seal the gap between the wear-resistant alloy gate and the box body. The box body component is provided with a shrinkage hole adjustment indicating device. The adjustable shrinkage hole of the present invention adopts the external transmission mechanism, which is not in contact with the pulverized coal, so that the transmission becomes reliable, and there is no jamming phenomenon under any circumstances; in the adjustable hole of the present invention, the ceramic wear-resistant pipe , The inner surface is bonded to the ceramic sheet, which can improve the wear resistance of the pulverized coal pipeline and achieve the purpose of prolonging the service life.

Description

technical field [0001] The invention belongs to a pressure equalization adjustment device for a pipeline system, in particular to a transmission mechanism external ceramic double-core adjustable shrinkage hole. Background technique [0002] In the coal direct-blown combustion system of thermal power plants, pulverized coal is used as fuel during normal operation of the boiler, and the combustion in the furnace is tangential combustion at four corners. However, due to the different pipeline arrangements of the pulverized coal pipes at the four corners of the boiler, 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. [0003] At present, most thermal power plants use dual-core regulation, and there are various structural forms to achieve dual-core regulation, but there are the following technical problems: [0004] 1. The material of the core board...

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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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