High-precision pneumatic liquid filling valve

• Main Authors: CHEN XIAOPING, HUANG DONGNING
• Format: Patent
• Language: Chinese; English
• Published: 19.04.2024
• Subjects: ACTUATING-FLOATS; BLASTING; BOTTLES, JARS OR SIMILAR CONTAINERS; CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OFBOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOTOTHERWISE PROVIDED FOR; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; FUNNELS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; LIQUID HANDLING; MECHANICAL ENGINEERING; OPENING, CLOSING; PERFORMING OPERATIONS; TAPS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VALVES; WEAPONS

The invention relates to the technical field of filling valves, and discloses a high-precision pneumatic liquid filling valve which comprises an upper air cylinder, an upper piston and an upper reset spring are arranged in the upper air cylinder, a lower air cylinder is arranged at the bottom end of the upper air cylinder, and a piston rod of the upper piston penetrates through the top of the lower air cylinder. A first sealing ring is arranged between the upper air cylinder and the lower air cylinder, a lower piston and a lower reset spring are arranged in the lower air cylinder, and a lower air chamber of the upper piston is communicated with an upper air chamber of the lower piston. After a relevant structure controlled by a liquid backflow channel is added, filling of common liquid can be achieved, constant-temperature filling of liquid can be achieved, the constant-temperature filling device is very useful for hot filling of liquid sensitive to temperature, volume change of the liquid caused by temperatu