A spray gun self-sealing pipe seat device for flue system

Abstract

The invention discloses a spray gun self-sealing pipe seat device used in a flue system, which comprises a spray gun pipe seat, and a plug support that is sealed and fixed to the inner wall of the spray gun pipe seat is arranged inside the front end of the spray gun pipe seat, and the plug support The middle part is provided with a through hole for the spray gun to pass through. The side of the plug support near the flue is provided with a plug fixing piece and a plug cover plate. The plug fixing piece is fixed on the plug support. One end of the cover plate is fixed with the plug fixing part through the rotating shaft with spring, the plug cover plate can rotate around the rotating shaft, and the other end of the plug cover plate is sealed and covered on the through hole; There is a washer support that is sealed and fastened to its inner wall, and the middle part of the washer support is provided with a multi-stage sealing washer, and the middle part of the sealing washer is provided with a hole for the spray gun to pass through; the rear end of the spray gun pipe seat is provided with a pipe seat internal thread. The pipe seat of the spray gun of the present invention is provided with three-stage sealing, the overall structure is simple, safe and efficient, and the sealing of the pipe seat is realized to prevent smoke from flowing out.

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. Background technique [0002] 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. [0003] 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 flue gas. ...

AI Technical Summary

Problems solved by technology

[0006] 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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