JP2806209B2 - Liquid filling method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for filling a liquid . More specifically, the present invention is a method of filling a container with a liquid after removing fine particles in the liquid to be filled with a filter, and it is possible to efficiently and continuously fill a large number of containers with the liquid. The present invention relates to a liquid filling method capable of constantly maintaining the function of a filter in a high efficiency state.

[0002]

2. Description of the Related Art It is known to fill a container with a liquid after removing fine particles in the liquid to be filled by a filter. However, when a large number of containers are sequentially filled with liquid, it is necessary to change and adjust the flow rate of the liquid supplied to the containers in accordance with the operation of replacing the containers. There is a problem that the concentration of the fine particles in the medium fluctuates.

[0003]

Under such circumstances, the problem to be solved by the present invention is a method for removing fine particles in a liquid to be filled by a filter and then filling the liquid into a container, It is an object of the present invention to provide a method for filling a liquid in which a large number of containers can be continuously filled with a liquid efficiently and a function of a filter can be constantly maintained in a highly efficient state.

[0004]

Means for Solving the Problems The present inventors first studied the cause of an increase and fluctuation in the concentration of fine particles. As a result, the filter for removing the fine particles in the liquid is required to maintain a high capturing effect by the so-called bridging phenomenon in which the eyes of the filter are bridged by the fine particles captured by the filter, and to fill the filter. When switching between the empty container and the filled container, the flow rate of the liquid passing through the filter fluctuates.At this time, the bridge of the filter is broken, and the fine particles forming the bridge re-scatter in the liquid, and the bridge is formed. Was found to reduce the efficiency of removing the broken filter. Furthermore, the present inventors have found that the above-mentioned problems can be solved at once by the present invention described below, and have reached the present invention.

That is, the present invention fills a container transported to one or more liquid supply ports with a predetermined amount of liquid, and then places the container transported to another one or more liquid supply ports. liquid filling the quantitative liquid carried out sequentially repeating the filling
A liquid having the following (A) to (D):
Of the following flow control valve (B) using the filling device
If the pressure is increasing, open one or more other flow control valves.
The present invention relates to a liquid filling method for reducing the degree of flow, and thus constantly maintaining the flow rate of the liquid passing through the filter of (A) . (A) : Liquid supply line with a filter in the middle (B) : Installed at the end of the liquid supply line, and a flow control valve
Two or more liquid supply ports having a flow rate control function consisting of : (C) : a function of adjusting the flow rate of the liquid supplied to each liquid supply port, and maintaining a constant flow rate of the liquid passing through the filter. Flow control system having function (D): detection means for detecting the opening of each flow control valve in (B)
Calculate using the stage and the detection signal, and filter (A)
Control system that keeps the flow rate of liquid passing through constant

The details will be described below. The filling device of the present invention has a liquid supply line having a filter in the middle of (A). When the liquid passes through the filter, fine particles in the liquid are captured and removed. Examples of the filter include a Teflon filter, a polyethylene filter, and a polypropylene filter having chemical resistance.

The filling device used in the present invention has (B) two or more liquid supply ports provided at the end of the liquid supply line and provided with a flow control function comprising a flow control valve. is there. That is, the liquid supply line of (A) is branched into two or more branch pipes at the end thereof, and each branch has a flow control function including a fully closing operation. As a method for providing a flow rate adjusting function, a normal method may be used,
For example, a method using a diaphragm type flow control valve or a cylinder type flow control valve can be used.
The wetted part of the control valve is preferably made of stainless steel or Teflon. In addition, in each liquid supply port,
It is preferable to install an automatic transport device that carries an empty container into the lower part of the supply port and carries out a filled container from the lower part of the supply port.

[0008] The filling device used in the present invention has (C) a function of adjusting the flow rate of the liquid supplied to each liquid supply port and a function of maintaining a constant flow rate of the liquid passing through the filter. It has a flow control system. Here, as the flow control system, for example, a system having a function of adjusting the opening degree of the flow control valve of the above (B) by the amount of liquid passing through the valve, and a filling container of the opening degree of the flow control valve of the (B) And a system that adjusts according to the amount of liquid filled in the container.

In the present invention, it is necessary to keep the flow rate of the liquid passing through the filter of (A) constant while adjusting the opening of the flow control valve of (B). That is,
When the opening of a certain flow control valve is increasing in the plurality of flow control valves, the opening of one or more other flow control valves is reduced, and thus the flow rate of the liquid passing through the filter of (A) is reduced. Keep it constant. For this purpose, a control system (D ) for calculating using the detection means for detecting the opening degree of each flow rate control valve and the detection signal in (B) to keep the flow rate of the liquid passing through the filter in (A) constant. ) May be used. As a system meeting such a purpose, a system designed and manufactured by a usual method may be used, or a commercially available system may be applied.

[0010] According to the method of the present invention, an empty vessel to be filled
And the liquid that passes through the filter when switching between filled containers
Your body flow fluctuates, and at this time the filter bridge
The fine particles that were destroyed and formed a bridge
As it re-splashes, the bridge breaks
Removal of fine particles in liquid due to reduced removal efficiency
It is possible to solve the decrease of the leaving effect.

[0011] Then, according to the present invention, the number of containers can be continuously filled with the liquid efficiently and it can maintain the function of the filter at all times with high efficiency state.

[0012]

Example 1 Example 1 A filter (manufactured by Teflon, mesh size: 0.05 μm)
Liquid supply line having two liquid supply ports provided at the end of the supply line and having a flow rate control function (diaphragm type flow rate control valve), and adjusting the flow rate of the liquid supplied to each liquid supply port Flow control system having a function of maintaining a constant flow rate of a liquid passing through a filter (detecting the opening of each flow control valve, calculating using the opening, and passing through the filter An apparatus having a flow control system for keeping the flow rate of the liquid constant) was prepared. In addition, a particle meter capable of measuring the particle concentration in the liquid was installed at each liquid supply port. A liquid containing fine particles is supplied to the above-described apparatus, and the particle concentration (particle size: 0. 1) in the liquid is measured by a particle meter.
(1 μm or more) was observed. The flow rate control system described above controlled the flow rate of the liquid passing through the filter unit to be constant. The results are shown in FIG. The results show that the concentration of particles in the liquid at the supply port is always maintained at a low level.

[0013] without using a flow control system in Comparative Example 1 Example 1, except that varying the liquid flow rate through the filter unit was carried out in the same manner as in Example 1. The results are shown in FIG. From the results, it can be seen that the particle concentration in the liquid at the supply port has reached an extremely high level according to the fluctuation of the flow rate of the liquid passing through the filter section.

[0014]

As described above, according to the present invention, a method for removing fine impurities in a liquid to be filled by a filter and then filling the liquid into a container is used. A liquid filling apparatus and a liquid filling method capable of filling well and maintaining the function of the filter in a highly efficient state at all times can be provided.

[Brief description of the drawings]

FIG. 1 is a chart showing the results of Example 1.

FIG. 2 is a chart showing the results of Comparative Example 1.

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65B 55/00 B65B 1/00-3/36

Claims (1)

(57) [Claims] 1. A container transported to one or more liquid supply ports is filled with a predetermined amount of liquid, and then a container transported to another one or more liquid supply ports is supplied with a predetermined amount of liquid. Filling,
A liquid filling method in which the filling is sequentially repeated.
And a liquid filling device having the following (A) to (D)
The opening of one of the flow control valves (B) below is increasing.
If necessary, reduce the opening of one or more other flow control valves,
Therefore, the liquid filling method of (A) in which the flow rate of the liquid passing through the filter is always kept constant. (A) : Liquid supply line with a filter in the middle (B) : Installed at the end of the liquid supply line, and a flow control valve
Two or more liquid supply ports having a flow rate control function consisting of : (C) : having a function of adjusting the flow rate of the liquid supplied to each liquid supply port, and maintaining a constant flow rate of the liquid passing through the filter. Flow control system having function (D): detection means for detecting the opening of each flow control valve in (B)
Calculate using the stage and the detection signal, and filter (A)
Control system that keeps the flow rate of liquid passing through constant