1 Filling principle

Automatic filling machine adopts rotary structure, in the process of rotary, using the filling valve piston rod operation control mechanism, mandrel handle rotation device designed to realize the filling valve suction, pressure material no bottle not filling and other functions. The filling valve adopts the piston type quantitative filling valve, utilizing the vacuum generated during the movement of the piston rod of the piston valve to suck the liquid into the piston cylinder, and then opening the valve to press the liquid in the piston into the bottle, thus completing the filling process. Due to the principle of piston vacuum adsorption, the filling process can be adjusted according to customer needs, set the stroke of the piston shaft movement, so as to more accurately control the volume of liquid sucked into the bottle, to achieve quantitative filling.

2 technical characteristics

2.1 Piston filling valve

Filling valve is one of the most important parts of the entire weighing and filling machine, the design of the filling valve directly affects the filling effect. Piston filling valve has a simple structure, accurate dosing, no dripping, and the spool is easy to install and remove. Its structure is as follows piston valve mainly consists of piston rod, piston cylinder, spool, positioning screws, the lower end of the piston rod is equipped with a sealing ring, the spool processed with two non-communicating, into 90 degrees of the channel. When installed, the suction port of the spool is connected to the discharge port of the cylinder.

Suction, the feeding channel is open, the suction port is connected with the quantitative suction chamber, the piston rod upward, the quantitative suction chamber to form a vacuum, so that the material from the cylinder through the suction port into the quantitative suction chamber, in the case of good sealing, the quantitative suction chamber every time the volume of the material sucked in should be a fixed value of the next material, spool handle in the equipment under the action of the control device to rotate 90 degrees, the lower channel is open, the feeding channel is closed, the lower channel is connected with the quantitative suction chamber, the lower channel is connected with the quantitative suction chamber and the suction port. When the piston rod goes down, the material from the quantitative suction chamber flows into the bottle placed under the lower feeding port through the lower feeding port. When it is necessary to clean the spool, just remove the positioning screw, that is, the spool can be pulled out. The filling valve design is simple and ingenious, accurate material fixing, easy to install and dismantle, relative to the electronic flowmeter type or weighing type quantitative filling, the cost is greatly reduced: at the same time, a wide range of applications, for the viscosity, poor fluidity, large particles of liquid, and even powdery particles of the material, can be applied.

2.2 Filling valve piston rod operation control mechanism

Liquid filling machine in a rotary cycle, the filling valve must complete the process of feeding, discharging, that is, the piston rod must complete a rising and falling reciprocating motion. In accordance with the process requirements, we designed a guide ring, so that the piston rod handle in the guide ring according to the trajectory of the guide ring movement, so as to realize the rising and falling piston rod. The details are as follows:

The guide ring consists of two layers of inclined rings parallel to each other, which are mounted on the periphery of the filling machine with a fixed bracket. One end of the guide ring is fixed, and the other end can be raised and lowered. The working principle is as follows: filling valve with the filling machine rotary, its piston rod handle roller in the two layers of guide rail between, along the fixed ring guide track up and down movement. When the piston rod roller in the middle of the two layers of guide rail rises to the highest point of the guide rail, the filling valve suction; when the piston rod roller down to the lowest point of the guide rail, the filling valve down filling; thus controlling and realizing the valve's suction, down filling.

For different filling volume needs, can be realized by adjusting the high point of the guide rail. The lowest point of the guide rail is fixed, the highest point of the guide rail can be adjusted in accordance with the piston rod rising stroke needs to be adjusted, the adjustment can be designed for electric, can also be designed for manual. When the highest point of the guide ring for adjustment, due to the piston rod on the roller profile is designed as a ball, so even if the guide ring tilt angle changes, the piston rod roller can still be adjusted in accordance with the guide rail trajectory in which the movement is free.

Quantitative filling machine design focuses on:

1)The lifting height of the guide rail ring can be adjusted to adapt to different filling volumes.

2)The lifting height of the guide ring can be calculated with the change of filling volume, lifting control is intuitive, fast and convenient.

3) The outer surface of the handle roller of the piston shaft is designed as a sphere to adapt to the tilting angle of the guide ring.

2.3 The realization of no bottle no filling

Automatic filling machine filling process, if a station is out of bottles, the filling valve must have no bottle not filling function, in order to eliminate waste of materials and ensure the sanitation of the filling environment. The filling system utilizes the structure that the piston valve spool rotates 90 degrees before the lower material channel can be opened, and the following spool rotation control device is used to ensure that no bottle is not filled. This mechanism includes a fixed upward guide rail, upward guide rail, downward guide rail, and upward guide rail solidly connected to the cylinder, and the cylinder is more connected to the swing block, and the swing block solidly connected to the swing guide rail and so on. This spool rotation control device circumferential direction fixed installation (not with the filling machine to do circular motion) in the filling machine peripheral suitable orientation.

Filling valve with the machine rotary movement for a week for a filling cycle, filling valve piston rod handle in the process of rotation along the fixed track trajectory up and down. When the filling valve is at the lowest point of the track, the piston rod of the filling valve is pressed down to the bottom, and the feeding channel is connected between the feeding port and the material cavity; then, the filling valve rotates with the material cylinder, and the piston rod handle moves along the track from the lowest point to the highest point, which makes the piston rod slowly rise, so that the material in the material cylinder is sucked into the material cavity of the filling valve; when the filling valve reaches the highest point of the track, the material cavity is full of Material: Then, there are two cases as follows.

The first situation: the sensor on the bottle feeding channel of the machine detects that a bottle enters the filling machine directly under a filling valve, when this bottle rotates to the area where the spool rotation control device is located, the cylinder works, the cylinder shaft is ejected, driving the swinging block to swing, and the swinging rail swings downward with the swinging block to open the ascending channel.2 Then, under the guidance of the swinging rail, the handle of the spool of the filling valve that rotates here enters the ascending channel, thus driving the spool to turn upward, which leads the spool to turn upward, and the spool is then turned into the ascending channel. Then, under the guidance of the swinging rail, the handle of the spool of the filling valve turns into the ascending channel, which drives the spool of the valve to turn upward, and when the handle reaches the top of the upper guide rail, the spool of the valve turns over 90 degrees, which makes the filling channel of the quantitative suction chamber and the lower material port of the filling valve connected, and the channel of the suction port and the quantitative suction chamber is closed. Then the handle moves forward horizontally along the upper horizontal guide rail track to keep the filling channel connected. At the same time, the filling piston rod starts to move from the highest point to the lowest point according to the predetermined track, so that the material in the material chamber is slowly filled into the bottle located under the filling valve; when the piston rod of the filling valve operates to the lowest point, the material in the quantitative suction chamber is completely pressed out and filled into the bottle. Then the spool handle enters the descending track, driving the spool to turn downward until 90 degrees, so that the filling channel between the quantitative suction chamber and the lower feeding port of the filling valve is closed, and the feeding channel between the suction port and the quantitative suction chamber is opened: at this time, the filling of a bottle is completed. Finally, the handle enters the lower horizontal track, keep the feeding channel open, repeat the previous action to enter the next cycle of filling materials for another bottle.

The second situation: when the sensor detects that there is no bottle directly under a filling valve, when the filling valve turns back to the area where the spool rotation control device is located, the cylinder does not move, the cylinder shaft is not ejected, the swinging block does not swing, the swinging rail maintains the original horizontal state, so that the ascending channel is closed: the spool handle is kept in the lower horizontal rail level forward, the filling valve feeding channel can be kept open, and the lower feeding channel is kept closed. The filling valve inlet channel is kept open, while the downstream channel is kept closed. At the same time, the filling valve piston rod according to a predetermined track operation, when it began to move from the highest point to the lowest point, because the feed channel has been kept open, the material in the material chamber can be pressed back from the quantitative suction chamber to the material cylinder, and then, can enter the next feeding cycle.

The focus of this no bottle no filling design is: through the use of sensors to control the drive mechanism of a cylinder, so that the pendulum can be filled according to whether there is a bottle below the valve and open or close the rising channel, so that the feeding channel is connected or the lower material channel is connected, strict control of the output of the material, to eliminate the emergence of the phenomenon of mis-filling, reduce the frequency of downtime, and effectively improve the filling efficiency. The design of the structure is simple, easy to maneuver, accurate control. Rotary large particle liquid filling equipment for can realize a variety of materials filling, widely used. The successful development of this equipment fills the company's blind spot in the filling technology of viscous liquids containing large particles, expands the company's new fields and brings more potential new customers.