Pneumatic cast steel gate valve

• Main Authors: HONG KUNSHENG, HONG CHUNLONG
• Format: Patent
• Language: Chinese; English
• Published: 27.06.2017
• 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 invention belongs to the field of valves, and particularly relates to a pneumatic cast steel gate valve. The pneumatic cast steel gate valve is characterized in that a through hole is formed in the bottom of a valve body; the diameter of the upper portion of the through hole is smaller than that of the lower portion; a wedge disc is located in a valve cavity and clamped between a first fixing seat and a second fixing seat; the bottom of the wedge disc is connected with a sealing cover through a connecting rod; the lower end of the connecting rod is arranged in the through hole; the diameter of the connecting rod is smaller than that of the through hole; the sealing cover is as big as the through hole, and the lower end of the sealing cover is arranged outside the through hole; a liquid receiving box is fixed to the bottom of the valve body and communicates with the through hole; one end of a connecting pipe communicates with the liquid receiving box, and the other end of the connecting pipe communicates w