Directing device with presetting function

• Main Authors: WANG CHENSHENG, DAI JING, WANG GUOQING, WANG ZHANXING, ZHOU SHIJUN, ZHANG CHENGCHEN, JI MINGGANG, GU JUNJIE, RUAN RUOBING, CHEN YE
• Format: Patent
• Language: Chinese; English
• Published: 15.12.2023
• 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; PIPE-LINE SYSTEMS; PIPE-LINES; STORING OF DISTRIBUTING GASES OR LIQUIDS; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

The utility model belongs to the field of gas transmission and distribution equipment, and discloses a pilot valve with a pre-adjusting function, which comprises a valve body, a lower valve cover, an upper valve cover, a spring assembly and a pre-adjusting diaphragm assembly, the valve body comprises a shell and a pilot valve diaphragm assembly, and a spring cavity is arranged below the pilot valve diaphragm assembly in the shell; an air outlet hole is formed in the lower valve cover; the upper valve cover covers the shell and the lower valve cover and forms a pre-adjusting cavity and a command cavity; a pressure guide channel, a gas channel, a pressure feedback hole and a gas inlet cavity are formed in the upper valve cover; the pre-adjusting diaphragm assembly can move up and down in the pre-adjusting cavity so as to open or close an air inlet valve port of the pre-adjusting diaphragm assembly; the spring assembly is arranged in the spring cavity and connected with the director diaphragm, so that the direct