JPH0431294A - Liquid filling apparatus - Google Patents

Abstract

PURPOSE:To accurately fill a specified amount of liquid by a method wherein a measuring rod which ascends with rising of a plunger and a sensor which detects the location of the measuring rod is provided, and a weight having a specified weight is put on the plunger. CONSTITUTION:A barrel 12 is installed on a cylinder 2, and a weight 16 is mounted on an upper rod of a plunger 14. When pressurized liquid is supplied to the barrel 12, the plunger 14 is moved up by the pressure of liquid, causing a measuring rod 20 connected to the plunger 14 to be pushed up and a measuring dog 18 attached to the plunger 14 to begin to rise. When the measuring dog 18 arrives at a measuring point sensor 26 and an ON signal of the measuring point sensor is output to a sequencer 30, a solenoid valve 32 is closed and pressure air supply to the cylinder 2 is stopped so that liquid supply to the barrel 12 is stopped. At this time, when the weight of the weight 16 is set at adequate value according to the viscosity of the liquid, the liquid can be stably filled without a leakage of liquid from the clearance of the plunger and mixing of air into the liquid.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fluid filling device for filling a container with a fluid for discharging and distributing fluid in fixed quantities, and particularly relates to a fluid filling device that can fill a fluid with high accuracy. Relating to a filling device.

[Conventional technology]

To fill a cylindrical container (hereinafter referred to as a barrel) with a narrow injection port at one end and an opening with the same diameter as the container at the other end (hereinafter referred to as a barrel), generally, the narrow injection port is placed at the bottom and the cylindrical container is opened with the same diameter as the container. Fill with the opening facing up from the top.

Furthermore, in order to fill the barrel with a fixed amount of fluid, the flow rate of the fluid injected into the barrel from the filling device is kept constant and controlled based on time.

[Problem that the invention seeks to solve]

By the way, according to the conventional injection method, that is, when filling the barrel with fluid with the cylindrical opening facing upward, the fluid is constantly exposed to air and is filled, so the surface of the fluid becomes rough and becomes laminated. There is a risk of air being mixed in. Also,
If the amount of injection is controlled based on time, there is a problem that errors in the amount of injection occur due to changes in the viscosity of the fluid, fluidity due to temperature, etc.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, the present invention aims to solve the above-mentioned disadvantages and realize a fluid filling device that can stably and uniformly fill a barrel without affecting the viscosity or fluidity of the fluid to be injected into the barrel.

Means for Solving Problem C] In order to solve the above problems, the fluid filling device of the present invention has a narrow discharge port and a container formed into a cylindrical shape into which a plunger can be inserted on the opposite side of the discharge port. A fluid filling device for filling fluid into a container, a filling device that connects a filling inlet to a discharge port of the container and pressurizes the fluid into the container, a measuring means for detecting an upper position of the fluid, and a filling device comprising: and a control device that controls the injection of the fluid by operating the pressure force based on the detected signal, and the measuring means has an end contacting the upper part of the plunger inserted into the cylindrical opening, It is characterized by consisting of a measuring rod that rises as the plunger rises, and a sensor that detects the moving position of the measuring rod. Further, a plunger is inserted into the cylindrical opening, and a weight having a predetermined weight is placed on top of the plunger.

[Effect]

With the above-described configuration, when filling the barrel with fluid, air is not mixed into the fluid, and a predetermined amount of fluid can be filled accurately. Further, it is possible to eliminate the influence on the fluid caused by inserting the plunger after filling the fluid.

〔Example〕

The present invention will be described in detail below based on the drawings.

FIG. 1 is a side view of a schematic configuration of a fluid filling device based on the present invention, and FIG. 2 is an overview including a mechanical configuration showing an example of a control circuit including a schematic mechanical configuration in the fluid filling device configuration shown in FIG. It is a block diagram.

Further, FIG. 3 is a flow diagram of the operation in this configuration.

In FIG. 1, reference numeral 2 denotes a cylinder of the main body of the filling device, and its cross section is shown. Reference numeral 4 denotes a bisten provided at the bottom of the cylinder, and the upper part of the piston is filled with fluid sent from a pipe 10 connected to a fluid tank (not shown) storing the fluid.

In addition, a valve 1 is provided at the connection between the pipe 10 and the cylinder 2.
1 is provided so that the fluid entering the cylinder 2 will not flow back into the pipe 10.

The piston, which is pushed up by pressurized air from an air pipe 8 connected to a source of pressurized air (not shown), presses the fluid filling the upper part of the piston into the barrel 12 connected to the upper opening.

A plunger 14 is inserted into the barrel 12 in advance, and a weight 16 (details of which will be described later) is attached to the upper part of the plunger 14.
is loaded.

Further, 6 is a holder that holds the barrel 12.

Further, 34 is an elevating mechanism for elevating and lowering the measuring rod 20 equipped with the measuring dog 18, and 24 is an upper limit sensor of the elevating mechanism;
26 is a measuring point sensor of the measuring rod 20, 28 is a lower limit sensor of the lifting mechanism, and 22 is a sensor that detects the presence or absence of a barrel.

Further, in FIG. 2, 30 is a sequencer of the main body of the fluid filling device control device, and 2 is a cylinder of the main body of the filling device shown in FIG. A barrel 12 is attached to the upper part of the cylinder 2, and a plunger 14 is inserted into the barrel 12.

A dipstick 20 is coupled to the plunger 14.
A measuring dog 18 is attached to the , and each of the upper limit sensor 24, lower limit sensor 28, measuring point sensor 20, and sensor 22 for detecting the presence or absence of a barrel of the lifting mechanism is connected to the sequencer 3o.

The above-mentioned weighing dog has a plate shape, the upper limit sensor 24 and the lower limit sensor 28 are magnetic sensors, and the weighing point sensor and the sensor for detecting the presence or absence of a barrel are photosensors.

Inputs from each of the sensors connected to the sequencer 30 are input to the sequencer 3o.

In the sequencer 30, a start switch (not shown)
The operation outputs an output to the drive mechanism 34 that drives the measuring rod 20 according to preset conditions, and the measuring rod 2
Raise and lower 0. Additionally, the output signal from the sequencer 30 drives the electromagnetic valve 32 to connect a pressure air source (not shown).
Filling of the fluid from the cylinder 2 to the barrel 12 is controlled by filling up the pressurized air sent from the air vibrator 8 connected to the cylinder 2.

Next, the operation of the above-mentioned configuration will be explained with reference to FIG.

When the fluid filling device is activated and starts operating, or during the operation process of the fluid filling device, the barrel 1 is inserted into the cylinder 2 by a device mechanism (not shown in the figure) in the first step.
Further, after the plunger 14 is inserted into the barrel 12 in step 2, the weight 16 is installed on the upper rond of the plunger 14 in step 3.

When the above-mentioned stroke is completed, in step 4, the drive device 34 of the dipstick 20 is activated by a signal from the sequencer 30, and the dipstick 20 is lowered.

The lower limit sensor 26 of the drive device 34 sends a detection signal to the drive device 3.
In step 5, the sequencer 30 outputs a signal to the solenoid valve 32 to drive the solenoid valve 32, and the pressure sent from the air pipe 8 connected from the pressure air source (not shown) is transmitted to the sequencer 30 of the pressure air source (not shown). Air is introduced into cylinder 2. The pressurized air pushes up the piston 4 and forces the fluid stored in the upper part of the piston into the barrel 12 through the upper opening.

When the fluid is pressurized into the barrel 12, the plunger 14 is raised by the pressure of the fluid, the measuring rod 20 connected to the plunger 14 is pushed up, and the dog provided on the measuring rod begins to rise.

When the weighing dog reaches the weighing point sensor, the on signal of the weighing point sensor is output to the sequencer 30, and in step 6, the output signal of the sequencer 30 stops outputting to the electromagnetic valve, closes the electromagnetic valve, and switches the output to the cylinder 2. Since the supply of pressurized air is stopped, the injection of fluid into the barrel 12 is stopped.

Further, in parallel to step 6, in step 7, a signal is sent to the drive mechanism 34 of the measuring rod 20 to raise the measuring rod 20.

The upper limit sensor provided in the drive mechanism 34 operates and transmits a detection signal to the sequencer 30.

The sequencer 30 that has received the upper limit detection signal sends a notification that the filling of the fluid to the barrel is completed to a higher-level control device (not shown), and by the operation of the higher-level control device, the sequencer 30 moves the barrel filled with fluid to the next one. Move to location, a new barrel is loaded into cylinder 2 and return to step 1.

In the process of the above-described flow, if the barrel presence detection sensor detects the presence of a barrel even though the lower limit sensor does not work after step 4, the detection signal is transmitted to the sequencer 30, so in step 9, Sequencer 30 sends a signal to drive mechanism 34 to raise the dipstick and return to step 4.

When the Stothops inch (not shown) is pressed during the above-mentioned operation process, the operation of the entire filling system is stopped in steps 11 and 12.

In the above explanation, it was explained that a measuring rod was used as the measuring means, and a Limisoto Swift and a photo sensor were used as each sensor, but as long as the sensor can perform the above function, it can be Any sensor such as a proximity sensor such as a sonic sensor may be used.

Further, although the explanation has been made using a sequencer as the control device, software processing using a microcomputer and an appropriate program may be used, or a control device configured with an electronic circuit may be used.

Also, although it is not included in the flow, the barrel presence signal is not obtained from the barrel presence sensor after step 1.
If it is no longer available, proceed to step 11 and stop the filling system.

Next, the function of the weight [6] loaded on the plunger 14 will be explained with reference to FIG.

In Fig. 4, 2 is the upper part of the cylinder, 12 is the barrel, and 1
4 is a plunger, 16 is a weight, and (A) shows a case where the weight is light, (B) shows a case where the weight is appropriate, and (C) shows a case where the weight is too heavy.

(A) As shown in the figure, when the weight is light, when the fluid is pressurized into the barrel, the lower part of the plunger floats and air gets mixed into the fluid as shown in a.

(C) As shown in the figure, when the weight is heavy, when fluid is forced into the barrel, the lower part of the plunger sinks and the fluid overflows from the gap in the plunger, as shown in figure b. (B)
As shown in the figure, when the weight of the weight is appropriate, air is not mixed into the fluid and the fluid does not overflow from the gap in the plunger and is stably filled.

That is, the weight weight is set to an appropriate value according to the viscosity of the fluid. However, instead of the weight, an appropriate pressure may be applied, for example, air pressure may be used.

Further, depending on the characteristics of the plunger and the fluid, it is not necessary to use a weight.

Further, depending on the conditions, the measuring rod may also have the function of a weight.

〔Effect of the invention〕

According to the present invention described above, air is not mixed into the fluid when the barrel is filled with fluid, and a predetermined amount of fluid can be filled accurately.

Further, an excellent effect can be obtained in that the influence on the fluid caused by inserting the plunger after filling the fluid can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a side view of a schematic configuration of a fluid filling device based on the present invention;
Figure 2 is a schematic block diagram including the mechanical configuration showing an example of the control circuit in the fluid filling device configuration shown in Figure 1, Figure 3 is a flow diagram of the operation in this configuration, and Figure 4 is an explanation of the weight effect. It is a diagram. In the figure, 2 is a cylinder, 4 is a piston, 6 is a holder, 8 is a pressure air vibrator, 10 is a fluid pipe, 11 is a valve, 12 is a barrel, 14 is a plunger, 16 is a weight, 18 is a measuring dog, and 20 is a A measuring rod, 22 is a barrel detection sensor, 24 is an upper limit sensor, 26 is a measuring point sensor, 2
8 is a lower limit sensor, 30 is a sequencer, 32 is an electromagnetic valve, and 34 is a drive mechanism. Figure Figure Figure (C)

Claims (1)

[Scope of Claims] 1. In a fluid filling device that fills a container with fluid into a container having a narrow discharge port and a cylindrical shape into which a plunger can be inserted on the opposite side of the discharge port, the filling inlet is connected to the discharge port of the container. a filling device connected to an outlet and pressurizing the fluid into the container; a measuring device detecting the upper position of the fluid; and a control device controlling the injection of the fluid by operating the pressure force based on a signal detected by the measuring device. A fluid filling device comprising: 2. The measuring means is characterized by comprising a measuring rod whose end is brought into contact with the upper part of the plunger inserted into the cylindrical opening, and which rises as the plunger rises, and a sensor that detects the moving position of the measuring rod. The fluid filling device according to claim 1. 3. The fluid filling device according to claim 1, wherein a plunger is inserted into the cylindrical opening, and a weight having a predetermined weight is placed above the plunger.