Internal tension type isolation door

Abstract

The invention belongs to the technical field of isolation doors, and relates to an internal tension type isolation door, in particular to an isolation door for stopping hot air to enter a coal mill at an inlet of the coal mill. The internal tension type isolation door comprises a doorframe, a first door sheet, a second door sheet, a sealing air device, a driving cylinder and two locking mechanisms, wherein the sealing air device is fixedly arranged on the lower part of the lateral surface of the doorframe; a piston rod of the driving cylinder penetrates through a piston rod sealing bracket to be connected with a piston rod support lug; the other end of a push-pull rod penetrates through a push-pull rod sealing bracket to be connected with a push-pull rod support lug; a first travel switch and a second travel switch are fixedly arranged at the two ends of a guide rail frame respectively; the two locking mechanisms are arranged between the first and second door sheets; and an ejector rod mechanism at the same height with the two locking mechanisms is arranged at the left end of the doorframe respectively. According to the internal tension type isolation door, the relative positions of the door sheets and the doorframe can be regulated, so that the sealing performance between the door sheets and the doorframe is improved, and the safety of a maintainer is improved.

Description

technical field [0001] The invention relates to a built-in tension type isolation door, in particular to an isolation door used at the entrance of a coal mill to prevent hot air from entering the coal mill, and belongs to the technical field of isolation doors. Background technique [0002] With the rapid development of thermal power units, coal mills, as the main pulverizing equipment in large thermal power plants, have also been developed accordingly. Coal mills have the advantages of low investment, low power consumption, and easy operation, but they also have disadvantages such as easy wear and long maintenance time. Since the pulverization capacity of the coal mill is directly related to the output of the generating set, the quality of the coal mill directly affects the normal operation of the entire power plant. [0003] As the main isolation equipment for the coal mill and boiler system, the isolation door is the most important in the system. When the coal mill is p...

AI Technical Summary

Problems solved by technology

Due to the large size of the door panel, it is easy to wear or deform the door panel during long-term operation, resulting in changes in the position between the door panel and the door frame, resulting in the phenomenon that the door body is not closed tightly and hot air leaks, which seriously threatens the normal operation and operation of the coal mill. Maintenance personnel safety

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