Exhaust pipe capable of preventing gas backflow

• Main Authors: HONG XINHAI, HONG YU
• Format: Patent
• Language: Chinese; English
• Published: 23.12.2022
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TAPS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VALVES; WEAPONS

The utility model relates to the field of air pipes, in particular to an exhaust pipe capable of preventing gas backflow, which comprises a pipe body and a limiting seat arranged on the inner side wall of the pipe body, and a flow channel for gas circulation is arranged on the limiting seat in a penetrating manner; a non-return plate sliding in the gas circulation direction is arranged in the pipe body, and the non-return plate is used for blocking an opening of the flow channel; a spring for pushing the non-return plate to plug the flow channel opening is further arranged in the pipe body, and the spring stretches out and draws back in the sliding direction of the non-return plate; one end of the spring is used for abutting against the check plate, and the other end of the spring is used for abutting against the inner side wall of the pipe body. And foul gas can be effectively prevented from flowing back from the flow channel, the probability that air in a designated area is subjected to secondary pollution