Pneumatic precise filling machine

Abstract

The invention discloses a pneumatic precise filling machine. The pneumatic precise filling machine comprises a liquid storage tank, a sealing cover, electromagnetic valves and a filling nozzle. The sealing cover is arranged at an opening of the liquid storage tank. The pneumatic precise filling machine is characterized in that the filling machine further comprises a riser tube and an air pump; the lower end of the riser tube stretches into the bottom of the liquid storage tank, the filling nozzle is arranged at the upper end of the riser tube, and an electric-control switch is also arranged at the upper end of the riser tube; the air pump communicates with a connector at the upper end of the liquid storage tank through an air pipe, and a pressure reducing valve and the first electromagnetic valve are arranged on the air pipe through which the air pump communicates with the liquid storage tank; an electronic scale is arranged below the filling nozzle, the electronic scale, the electric-control switch and the first electromagnetic valve are all electrically connected with a programmable logic controller, and both the first electromagnetic valve and the electric-control switch are opened and closed through the programmable logic controller according to the weighing information of the electronic scale. The pneumatic precise filling machine is reasonable in structure; pneumatic liquid filling is adopted, so that the problem that the storage quality of liquid is affected due to the fact that bubbles are generated in the liquid filling process is solved.

Description

technical field [0001] The invention relates to an improved invention of a filling machine in the fields of liquid medicine, beverage, chemical liquid preparation, viscous colloid, etc., and in particular to an improved invention of a pneumatic precision filling machine. Background technique [0002] In the prior art, the pumping type of the filling machine is easy to generate air bubbles that will affect the filling liquid, while the cylinder is used to directly drag the piston barrel, suck the filling liquid into the barrel, and then push the liquid into the filling bottle In this way, the piston barrel will pollute the filling liquid because the sealing material must be a rubber and plastic sealing ring, and the sealing ring will wear out after long-term reciprocating work, which will easily lead to leakage and make the measurement inaccurate. The method of measuring the weight of different filling liquids equal to the volume and multiplying the specific gravity makes eac...

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Problems solved by technology

[0002] In the prior art, the pumping type of the filling machine is easy to generate air bubbles that will affect the filling liquid, while the cylinder is used to directly drag the piston barrel, suck the filling liquid into the barrel, and then push the liquid into the filling bottle In this way, the piston barrel will pollute the filling liquid because the sealing material must be a rubber and plastic sealing ring, and the sealing ring will wear out after long-term reciprocating work, which will easily lead to leakage and make the measurement inaccurate. The method of measuring the weight of different filling liquids equal to the volume and multiplying the specific gravity makes each batch of each filling liquid have to be manually calculated, which is troublesome to operate, and the measurement is indirect weight instead of direct weight, which makes the error large. At the same time, the existing filling machine has complex mechanical structure and difficult processing technology, resulting in high cost

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