Upper-opening-type filling valve with central small flow rate

Abstract

The invention belongs to a liquid filling device, and specifically relates to an upper-opening-type filling valve with a central small flow rate. The filling valve comprises a two-stroke cylinder, a connection rack, an upper flange, a valve body, a valve stem, a connection sleeve, a piston head, and a piston sealing plate. The two-stroke cylinder is fixed on the top of the connection rack. The bottom of the connection rack is fixedly connected with the top of the upper flange. The upper flange is a cylinder with a protruding rim on the top. The flange protruding rim is fixed on the top of the valve body. A piston rod on the bottom of the two-stroke cylinder is connected with the top of the valve stem through the connection sleeve. The bottom of the valve stem is fixedly connected with the top of the piston head. The piston sealing plate is embedded between the valve bottom and the piston head. A spring is sleeved on the valve stem between the upper flange and the piston head. The filling valve assists in solving problems of mutual restrictions of large and small flow rates, material lateral spitting during a flow rate switching process, and wire breakage of viscose materials. With the filling valve, small flow rate stability is improved, and filling precision is improved.

Description

technical field [0001] The invention belongs to a liquid filling device, in particular to a filling valve with a central small flow top-opening valve. Background technique [0002] At present, in the liquid quantitative filling equipment in the entire filling and packaging field, the structure of the filling head is always an important link that determines the filling quality, filling accuracy, and filling speed. In order to meet the dual requirements of filling speed and filling accuracy, most of them adopt the double-speed filling mode: firstly, high-speed filling with large flow rate is used, and when the filling volume reaches the required filling volume, the high-flow filling is turned off and switched to small flow Filling, so that he can meet the requirements of high speed and high precision. [0003] The existing top-opening valve filling head is usually powered by a double-stroke cylinder, and the valve plate is lifted up to fully open the filling head for large-fl...

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a filling valve with a small flow rate in the center and an upper opening valve type. The filling valve can solve the problems of mutual restriction of large and small flow rates, material side splashing during flow switching process, and broken wires of viscous materials. Small flow stability, improve filling accuracy

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