Multichannel synchronous filling device of liquid filling machine

Abstract

The invention relates to a multichannel synchronous filling device of a liquid filling machine, which comprises a liquid storage bath, a filling unit, a mount, a lifter plate, a servo motor, a ball screw and a screw-nut sleeve. the servo motor is fixed on a fixed plate of the mount, the screw-nut sleeve is fixed on the lifter plate and is in screwed fit with the ball screw; in the filling unit, a filling cylinder is in ceiling mounting, the body of a cylinder sleeve towards downward, a piston rod towards downward, a three-way connection is provided on the lower end face of the filling cylinder, a three-way valve is connected between the liquid storage bath and the three-way connection through a flexible pipe, the discharge hatch of the three-way valve is connected with a filling nozzle. The structure of the invention has no bubbling and draining phenomena, and is capable of saving the filled raw materials, and avoiding accident damage on operators caused by the leakage of the materials, the filling machine can reach maintenance-free requirement. The power consumption for driving lifting is low, so that the energy and the cost can be saved. The product type can be replaced in a convenient and fast mode, so that the user requirement can be satisfied.

Description

Technical field: [0001] The invention relates to a vertical liquid filling machine, in particular to a vertical piston type constant volume liquid filling machine. Background technique: [0002] Most of the existing vertical liquid filling machines use piston-type filling cylinders to achieve filling. Among them, the filling cylinders are usually driven by air pressure, that is, the cylinder drives the piston in the filling cylinder to twitch back and forth to realize the filling of liquid materials. Filling, but due to the existence of pneumatic filling filling machines ① single filling speed, when the filling volume is close to full, the filled liquid is prone to foam overflowing from the mouth of the bottle, to overcome this shortcoming can only be reduced filling speed, so that The filling efficiency is low, and the production capacity of the whole machine cannot be brought into play. ②The filling accuracy is not high. Since the pneumatic filling machine uses pressure g...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing vertical liquid filling machines use piston-type filling cylinders to achieve filling. Among them, the filling cylinders are usually driven by air pressure, that is, the cylinder drives the piston in the filling cylinder to twitch back and forth to realize the filling of liquid materials. Filling, but due to the existence of pneumatic filling filling machines ① single filling speed, when the filling volume is close to full, the filled liquid is prone to foam overflowing from the mouth of the bottle, to overcome this shortcoming can only be reduced filling speed, so that The filling efficiency is low, and the production capacity of the whole machine cannot be brought into play

②The filling accuracy is not high. Since the pneumatic filling machine uses pressure gas as the power source, and the gas has compressible characteristics, when the air pressure fluctuates greatly, the cylinder piston detects the piston signal from the magnetic switch during the forward process. When the solenoid valve changes direction, the entire return stroke of the piston will change, resulting in a change in the filling dose, which will affect the stability of the filling dose.

③When adjusting the filling dose, each filling cylinder must be adjusted one by one, which is not only troublesome to debug, but also wastes a lot of filling materials. For multi-head filling machines, the adjustment time is longer and more troublesome

[0005] ①Because all the filling cylinders are installed on the upper fixed plate, and the piston rod is fixed on the lifting plate, when the liquid in the filling cylinder and the weight of the piston increase after the material is sucked, it must be equipped with a relatively large High-power servo motor, the price of the servo motor is related to the high power, which is one of the reasons why it is difficult to reduce the manufacturing cost of the whole machine. At the same time, the filling machine consumes a lot of power when it is lifted and filled, and the operating cost is high.

[0006] ②Because all the filling cylinders are installed on the upper fixing plate and the piston rod is fixed on the lifting plate, the filling liquid will leak from the gap between the piston and the inner wall of the cylinder liner during the operation of the whole machine. The formation of drips will not only waste the liquid to be filled, but also pollute the equipment, especially when filling toxic, harmful and corrosive liquids, it will not only harm the operator, but also corrode the equipment

[0007] ③It is inconvenient to change the variety, time-consuming and labor-intensive

When replacing different liquids, it is necessary to clean the filling tank repeatedly. Generally, it needs to be sucked and cleaned with clean water for 15 to 20 times. For liquids with strict high-purity requirements, even this cannot meet the requirements, and the filling tank must be disassembled and cleaned. Liquid suction and discharge pipelines, which are both water-intensive and labor-intensive, also affect the actual filling efficiency of the filling machine, and it is difficult to meet people's requirements for quickly changing varieties in the actual filling production process

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