High temperature resistance hard sealing quickly-closed door

Abstract

The invention relates to a high temperature resistance hard sealing quickly-closed door. The high temperature resistance hard sealing quickly-closed door comprises a shell, an upper square round section, a lower square round section, an air cylinder, a main shaft, a crank, a rocker arm, a valve plate and a valve seat. According to the high temperature resistance hard sealing quickly-closed door, the transition of the upper square round section and the lower square round section is connected with a cold air pipeline or a warm air pipeline at the inlet of a coal mill, a pushing force or a pulling force of an air cylinder rod is used for quickly pushing the main shaft to rotate clockwise (in the closing direction) or counterclockwise (in the opening direction) by 90 degrees trough the crank; the rotation of the main shaft drives the valve plate to move through the rocker arm, so that the valve plate and the valve seat are tightly attached or separated so as to achieve the function of isolating a medium inside the pipeline or enabling the medium inside the pipeline to be circulated. The functions of simple structure, zero leakage, no accumulated dust and short opening and closing time are realized; after the high temperature resistance hard sealing quickly-closed door is quickly closed, the temperature inside the coal mill is below 40 DEG C, so that safe operation of a boiler is ensured, and the maintenance work of the coal mill is successfully completed.

Description

technical field [0001] The invention relates to the auxiliary equipment of the power plant boiler, in particular to a high-temperature-resistant hard-sealed quick-closing door. Background technique [0002] High-temperature hard-sealed quick-closing door, also known as high-temperature-resistant butterfly valve, is an important auxiliary equipment for boilers, and it is installed on the hot and cold air ducts of thermal power plant boilers that need to be shut off and isolated quickly, especially on the hot primary air duct at the inlet of the coal mill. . [0003] The coal mill is one of the important auxiliary machines of the boiler, and its reliability has an important impact on the safe, stable and economical operation of the boiler. The working environment of the coal mill is harsh, and various failures will inevitably occur during operation. In order to ensure the safe and reliable maintenance of the coal mill during the operation of the unit, the cold and hot air of ...

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the above-mentioned existing traditional hot air isolation door obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently.

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but for a long time no suitable design has been developed, and the general product has no suitable structure to solve the above-mentioned problems. This is obviously the relevant industry. Urgent problem

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