JPH02173529A - Automatic filling method for liquid - Google Patents

Abstract

PURPOSE:To fill a liquid by correcting automatically and successively a head of a filling nozzle by taking an average value of a filling correction value of the previous time and an actual result head value of the present time, whenever a dram can is filled with the liquid, and correcting successively a head correction value. CONSTITUTION:A filling nozzle 2 for filling a dram can 1 with a liquid by positioning its tip under a liquid level, a weighting part 3 for weighting the weight of the liquid filled by the nozzle 2 and transmitting its weighing value, and a weighting control part 4 for receiving the weighing value from the weighing part 3 and bringing the nozzle 2 to ascent-control are provided. In this state, the liquid is divided and filled by plural times into a first container 1 at the time when filling is started, an average head value of the nozzle 2 is derived from a head at the time of each dividing and filling, and by setting this average head value as a filling correction value of the next container, a set filling quantum in the container 1 is corrected, and the liquid is filled. Thereafter, an average value of an actual result head value of each container and the filling correction value of the container immediately before is derived, and while correcting successively the filling correction value as the filling correction value of the next container, the liquid is filled.

Description

Detailed Description of the Invention (Industrial Field of Application) The automatic liquid filling method of the present invention, particularly a liquid that corrects errors caused by vinegar leaking from a filling nozzle when filling a set weight of liquid into a container. relates to an automatic filling method.

[Conventional technology]

Filling the container with liquid is completed by closing the valve of the filling nozzle, but even after filling is finished, liquid leaks into the container from the filling nozzle, making it impossible to ensure an accurate set weight. could not.

Therefore, conventionally, multiple containers are filled with liquid and a liquid leakage ff1 (hereinafter referred to as "head") is created each time. a
The shell is measured, the average value of each measured head is calculated, and the weight that is subtracted from the set filling amount by the average head is set as the charging filling amount, and the charging R amount is set so that the valve of the filling nozzle closes at that charging filling amount. was adjusted manually.

[The invention tries to solve i! It! However, when the head is manually set by an operator, it is not always possible to make an accurate +i1i correction, making it impossible to perform accurate filling.

In addition, there is also the problem that the head of each liquid varies depending on the physical properties of the liquid to be filled, such as the viscosity.
It was difficult to maintain.

Therefore, an object of the present invention is to provide an automatic liquid filling method that can automatically and sequentially correct the head of a filling nozzle for each container to be filled with liquid, without being influenced by various physical properties of the liquid. Our goal is to provide the following.

[Means to solve the problem]

The present invention provides an automatic liquid filling method for automatically filling a container with liquid using a filling nozzle, in which a first container to be filled with the liquid is filled with the liquid in a plurality of divided portions;
After filling a predetermined amount, the average value of the amount of liquid leaking into the container from the filling nozzle during each divided filling is determined as the filling value of the next container, and the next container is filled with:
Fill the above-mentioned filling correction (Hi) less liquid than the set liquid ■, and calculate the liquid leakage at that time, and calculate the average value with the filling correction 1affi described in 1. The two objectives have been achieved by providing an automatic liquid filling method that is characterized in that filling is performed while sequentially correcting the filling correction value in the same way as for containers.

[Function] According to the automatic liquid filling method of the present invention, the liquid is dividedly filled into the first container multiple times at the start of filling, and the average VrS difference value of the filling nozzle is determined from the head difference at each divided filling, The average head value is used as the filling correction value for the next container to correct the set light 1affi in the container and the liquid is filled, and thereafter, the average value of the actual head value of each container and the filling correction value of the immediately preceding container is calculated. seek,
The liquid is filled while sequentially correcting the filling correction value as the filling correction value of the next container.

〔Example〕

Hereinafter, a liquid filling apparatus suitable for carrying out the automatic filling method of the present invention will be described based on the embodiment shown in FIG.

Before explaining the apparatus of the embodiment shown in FIG. 1, we will first outline the liquid filling system using the apparatus of this embodiment. (hereinafter represented by 'DIIJ)
a palate detection station that detects the position of the drum, an opening station that opens the palate of the drum detected at the palate detection station, and an opening stage that fills the opened filling port with liquid in the tongue, It is equipped with a filling/weighing station for weighing, and a closing station for closing the filling opening of the drum filled/81ffi at the filling/weighing station.

That is, in the liquid filling system described above, as shown in FIG.
After the spout detection station detects the spout position on the top plate of the drum 1, the drum 1 is guided to the opening stage tongue, where the lid (not shown) of the drum 1 is opened.Then, the lid is opened. The filled drum 1 is guided to a filling/weighing stage, and a lid is attached to the drum 1 at a lid closing station.

The apparatus of this embodiment is commonly used in the above-mentioned filling and measuring station, and FIG. 1 shows its control system.

As shown in FIG. 1, the apparatus of this embodiment includes a filling nozzle 2 which can be raised and lowered to fill a drum l with liquid with its tip positioned below the liquid level, and the weight of the liquid filled by the filling nozzle 2. A metering section 3 which measures and transmits the measured value, and a metering control section 4 which receives the jll value from the metering section 3 and controls the filling nozzle 2 upward are provided. The one-quantity control section 4 is connected to an electric valve 6 attached to the bumper tank 5, and controls opening and closing of the electric valve 6 in conjunction with the measured value of the measuring section 3. The electric valve 6 is connected to the filling pulp 2 via a flexible tube 7, and opening and closing of the electric valve 6 causes the filling nozzle 2 to start and stop filling the drum l with liquid. It is composed of

Next, a method according to an embodiment of the present invention using the above-mentioned charging apparatus 1a will be explained with reference to the flowchart shown in FIG.

As described above, the method of this embodiment is carried out as follows by controlling the opening and closing of the electric valve 6 by the single quantity control section 4.

That is, the weighing section 3 measures the weight of the drum l at the start of filling, and the weighing control section 4 receives the measured value.
(step 100). If the metering system 1ff1 section 4 determines that there is a liquid scrap amount in the drum l, the scrap amount is determined by the above-mentioned minimum measurement i. [Divide by the il value to find the number of divided weighings N (step 101). On the other hand, if it is determined that the drum 1 is new without any offcuts, the set filling amount of the drum 1 is calculated from the minimum total ffi weight value in t. Based on this, the number of divided measurements N is determined in the same manner as described above (step 102).

When the above process is completed, the metering control section 4 sends a close command signal to the electric valve 6 to open the electric valve 6 and start filling (step 103), and when the divided metering value is reached, a close command is issued. A signal is sent to close the electric valve 6 (step 104). At this time, the filling nozzle 2
Wait until the leakage of the liquid is completed, and when the measured value of the measuring section 3 becomes stable, subtract the minimum measured value from the total ffi value to obtain the head difference at the time of split filling (step 105). On the other hand, the weighing control section 4 determines whether or not the predetermined number of split weighings N has been reached for each split filling (step 10G). If the predetermined number of split weighings N has not been reached, the process returns to step 103 and step If the above-mentioned divisional filling up to 105 is performed and the predetermined number of divisional weighings N has been reached, the sum of the above-mentioned respective l'R differences is calculated, and the average value of the head is determined based on the predetermined number of divisional weighings N. (Step 107
) is set as the filling correction value for the next drum l (step 10B).

At this time, the drum 1 to be filled next has reached the filling position, and the metering control section 4 opens the electric valve 6 as described above to start filling the next drum 1 with liquid (step 109).

Then, the measuring section 3 detects a measuring value obtained by subtracting the filling correction value amount from the set filling amount, and sends the first quantity value to the metering control section 4. The J1 unit 4 sends a close command signal to close the electric valve 6 and stop filling (step 110).

At this time as well, after waiting for the 81 quantity value of the measuring section 3 to stabilize, the actual head value of the drum can 1 is determined, and the average value of the filling correction value of the immediately preceding drum can 1 and the actual tX11 head value is calculated. (step 111), and this average value is set as the filling correction value for the drum l to be filled next.

Then, the metering control section 4 determines whether or not all the drums 1 have been filled (step 113).
, if not completed, repeat steps 109 to 112, and if all drums l have been filled, the filling is completed.

When filling with new liquid, the series of operations described above are performed.

According to the method of this embodiment, each time a drum l is filled with liquid, the average value of the previous filling correction value and the current actual head value is taken, and the head correction value is sequentially corrected, and the liquid is filled accurately. filling can be performed. Further, according to this embodiment, filling can be performed accurately without being influenced by various physical properties such as the viscosity of the liquid.

It goes without saying that when carrying out this method, the opening degree of the electric valve 6 is appropriately adjusted depending on various physical properties such as the capacity of the container or the viscosity of the liquid.

〔Effect of the invention〕

According to the automatic liquid filling method of the present invention, it is possible to automatically and sequentially correct the head of the filling nozzle for each container filled with liquid, without being influenced by various physical properties of the liquid. .

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing a filling apparatus suitable for carrying out the automatic liquid filling method of the present invention, and FIG. 2 is a flowchart for explaining the automatic liquid filling method of the present invention. 1; Drum (container) 2; Filling nozzle 3: Measuring part
4; Metering control unit 6; Electric valve Fig. 2

Claims (1)

[Claims] In an automatic liquid filling method in which liquid is automatically filled into a container by a filling nozzle, the first container to be filled with the liquid is filled with the liquid in multiple portions, and after filling a predetermined amount, each portion is filled with the liquid. The average value of the amount of liquid leaking into the container from the filling nozzle during filling is determined as the filling correction value for the next container, and the next container is filled with liquid that is less than the set liquid amount by the amount of the filling correction value. At the same time, calculate the amount of liquid leaking at that time, calculate the average value with the above filling correction value amount, and fill each subsequent container while sequentially correcting the filling correction value in the same way as the previous container. An automatic liquid filling method characterized by: