Coke oven bridge pipe turning plate shaft head smoking-proof structure

Abstract

The invention relates to a coke oven bridge pipe turning plate shaft head smoking-proof structure. The smoking-proof structure comprises a rotating shaft, a valve body, a screw, a hollow sleeve and apacking gland; the rotating shaft is sleeved in the packing gland and is assembled on the valve body through the packing gland; the rotating shaft, the packing gland and the valve body are sealed through a first sealing packing; the packing gland and the valve body are locked through the screw, and the first sealing packing is compacted; the hollow sleeve sleeves the shaft head end of the valve body, and the rotating shaft penetrates out of the hollow sleeve; the hollow sleeve and the rotating shaft are sealed through a second sealing packing; the hollow sleeve and the valve body are sealed through a third sealing packing, the hollow sleeve and the screw are locked through a third fastening nut and compact the second sealing packing and the third sealing packing, and a cavity between the hollow sleeve and the rotating shaft and a cavity between the valve body and the packing gland are filled with lubricating grease. The dependence of the shaft head sealing effect on the structural integrity of the sealing packings can be reduced, the continuous and effective sealing effect is achieved, and smoke leakage is effectively prevented.

Description

technical field [0001] The invention belongs to the technical field of a shaft seal structure of a process device, and in particular relates to an anti-smoke structure of a coke oven bridge tube flap shaft head. Background technique [0002] During the daily production process of the coke oven, the raw coal gas produced in each carbonization chamber is transported to the chemical production area through the riser pipe, bridge pipe and gas collection pipe. The process device is an indispensable part of coking, and a turning device is installed above the bridge pipe And high-pressure ammonia water, used to cut off and cool the raw gas. [0003] The rotating bearing seat of the flap device is located outside the body, and the flap is manually opened and closed. However, due to frequent operations during production or maintenance, the packing is easily worn or deformed, and the inside of the carbonization chamber is under positive pressure, and the raw gas will flow along the sh...

AI Technical Summary

Problems solved by technology

[0004] First, the color of the raw gas is yellow, and the raw gas has been escaping from the shaft head, which is easy to be captured by the environmental protection department, causing environmental protection accidents; second, a large amount of raw gas escapes and affects the surrounding operating environment, which is likely to cause poisoning and occupational diseases; Third, the recurrence rate is as high as 100%, which requires a lot of manpower and material resources to deal with continuously, and the cost is high; fourth, if the sealing packing is too tight after repeated treatment, it will be difficult to manually operate the valve, and if it is too loose, it will cause Severe waste of gas

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