Spraying gun self-sealing tube base device for flue system

Abstract

The invention discloses a spraying gun self-sealing tube base device for a flue system. The spraying gun self-sealing tube base device comprises a spraying gun tube base. A plug support which is clamped and fixed to the inner wall of the spraying gun tube base in a sealing mode is arranged inside the front end of the spraying gun tube base. A through hole for a spraying gun to penetrate is formed in the middle of the plug support. A plug fixing piece and a plug cover plate are arranged on the side, close to a flue, of the plug support; the plug fixing piece is fixed to the plug support; one end of the plug cover plate is fixedly connected with the plug fixing piece through a rotating shaft with a spring, the plug cover plate can rotate around the rotating shaft, and the other end of the plug cover plate covers the through hole in a sealing mode. A gasket support which is clamped and fixed to the inner wall of the spraying gun tube base in a sealing mode is arranged inside the middle section of the spraying gun tube base, multi-stage sealing gaskets are arranged in the middle of the gasket support, and holes for the spraying gun to penetrate are formed in the middles of the sealing gaskets. Tube base internal threads are arranged inside the rear end of the spraying gun tube base. The spraying gun tube base is provided with a three-stage sealing structure, the overall structure is simple, safe and efficient, and the purposes of sealing the tube base and preventing flue gas from flowing outwards are achieved.

Description

technical field [0001] The invention relates to a spray gun self-sealing pipe seat device used in a flue system, and belongs to the technical field of flue sealing pipe seats. [0002] Background technique [0003] The domestic power market is basically dominated by coal-fired boilers. With the stricter national environmental protection policies, the requirements for boiler NOx emissions are also getting higher and higher. In order to reduce pollutant emissions, denitrification technologies such as SCR (Selective Catalytic Redox Reaction) and SNCR (Selective Non-Catalytic Redox Reaction) are used in boiler flue gas emission reduction systems. [0004] The flue needs to use a spray gun to spray reducing agent into the boiler at a suitable position in the boiler. However, the inside of the flue is a high-temperature flue gas environment, and it is generally a positive pressure system. Therefore, the spray gun needs to be sealed in the pipe seat to prevent the leakage of the ...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a spray gun self-sealing pipe seat device for the flue system, which can automatically keep the seal when there is no spray gun to prevent the outflow of smoke. When inserting the spray gun, there is no need to operate the pipe seat, and the seal can When the spray gun enters and opens, it does not affect the work of the spray gun; it solves the technical problems that the existing pipe seat prevents the smoke from flowing out through the flange or threaded connection, the sealing effect is not good, the installation and disassembly are inconvenient, and waste of manpower and time is thus solved. Can effectively solve the problems existing in the above-mentioned prior art

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