Exhaust back pressure valve capable of reducing waste gas leakage

• Main Authors: LI BING, ZHANG GUANXU, CHEN XIANLI
• Format: Patent
• Language: Chinese; English
• Published: 22.11.2022
• 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; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

The utility model discloses an exhaust back pressure valve capable of reducing waste gas leakage, which comprises a valve body, a valve plate sleeved on a transmission shaft is arranged in the valve body, the transmission shaft is rotatably arranged in the valve body, one end of the transmission shaft is provided with a sealing device, the sealing device comprises a mounting hole arranged on the valve body, and the valve plate is arranged on the valve body. One end of the transmission shaft penetrates through the mounting hole, a clamping groove is formed in the position, corresponding to the mounting hole, of the transmission shaft, a shaft sealing ring is arranged in the clamping groove in a sleeved mode, and an opening is formed in one end of the shaft sealing ring. The shaft seal ring is arranged, air pressure is used for pushing the shaft seal ring to move and blocking an air leakage gap, waste gas leakage is greatly reduced, the structure is simple and compact, and use is convenient and fast. 本实用新型公开了一种