JP2001348001A - Liquid filling apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid filling apparatus capable of filling various kinds of liquids into a container, preventing the liquid from scattering in the filling of it, and automatically filling an accurate quantity of it into the container. SOLUTION: The liquid filling apparatus for filling a desired quantity of a liquid 10 into a large-sized container 20 is composed of a filling tank 12 for holding therein the liquid 10 for filling, liquid feed means 4, 6, 8 for feeding the liquid 10 from the filling tank 12 to the large-sized container 20, a liquid measuring means 2 adapted to measure always or opportunely a quantity of the liquid with which the large-sized container 20 has been filled, and a liquid feed quantity control means 14 for controlling a liquid feed quantity of the liquid 10 to be fed by the liquid feed means 4, 6, 8 as mentioned below at respective stages of an initial filling stage, an intermediate filling stage and a final filling stage for the liquid 10. (Initial filling stage): the liquid feed quantity of the liquid 10 is made to gradually increase. (Intermediate filling stage): the liquid feed quantity of the liquid 10 is kept substantially constant. (Final filling stage): the liquid feed quantity of the liquid 10 is made to decrease, and the liquid feed is stopped at a point of time when the liquid quantity contained in the large-sized container 20 reaches a desired quantity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid filling apparatus for filling a desired amount of liquid into a large container such as a drum or a container, and more particularly to a liquid filling apparatus suitable for filling a liquid designated as a poisonous substance. The present invention relates to a liquid filling device.

[0002]

2. Description of the Related Art When filling a liquid such as an industrial chemical into a large container such as a drum or a container, a desired amount has been conventionally used by using a mass flow meter. That is,
Arrange a mass flow meter and a valve in the middle of the liquid sending pipe, and at the stage where the desired amount of liquid has passed through the liquid sending pipe, manually or automatically close the valve to add the desired amount of liquid to the large container. Had been filled. However, the mass flowmeter is susceptible to the influence of the viscosity, specific gravity, temperature, etc. of the liquid to be filled, so that accurate measurement is difficult and it is difficult to handle various liquids.

In order to fill each type of liquid with an accurate amount of liquid each time, an operator generally performs a filling operation manually using a liquid filling device as shown in FIG. The liquid filling apparatus shown in FIG. 7 is arranged in the middle of a filling tank 42 for holding a liquid 40 to be filled, a liquid sending pipe 44 connected to a lower part of the filling tank 42 via a manual valve 46, and a liquid sending pipe 44. A liquid 48 is filled in a container 50 which is a large container from an end of the liquid sending pipe 44 opposite to the manual valve 46. Further, the liquid filling device includes a container 5
0, a mass sensing unit 52a,
and a computing unit 52b that computes the mass of the container 50 based on the signal from a.
The measured value of the mass meter 52 can be monitored by the monitor 54.

[0004] As shown in FIG.
0, the liquid feed pipe 44 is fixed to the pedestal 58 so that the end of the liquid feed pipe 44 on the opposite side to the manual valve 46 is located, the manual valve 46 is opened, and the pump 48
Switch 56 is turned on. Then, the liquid 40 held in the filling tank 42 is sent from the solution sending pipe 44 by the solution sending pressure of the pump 48, and is filled in the container 50. Then, the operator starts the liquid 40 filled in the container 50.
The switch 56 of the pump 48 is turned off while checking with the monitor 54 so that the amount of
Is closed. In this way, if the operator performs the filling while visually confirming the filling amount, it is possible to perform highly accurate weighing corresponding to various liquids.

However, to fill a large container with liquid,
Due to the problem of time efficiency, it is generally necessary to fill a considerable amount of liquid.However, even if the valve closing timing is slightly shifted, an error occurs in the filling amount. It was difficult. Also, if the liquid is filled with a large amount of liquid sent from the start of filling, the liquid is scattered, which is not preferable from the viewpoint of deterioration of the working environment and safety of the operator, especially when the liquid to be filled is a poisonous substance. .

As a countermeasure for these problems, a pump 4
8, the liquid sending capacity is variable, and at the start of filling, the liquid sending amount (liquid flow rate per unit time) is gradually increased (gradually increased).
In this way, it is also conceivable to prevent the liquid from being scattered, and to reduce the amount of liquid to be fed before the filling is completed, thereby facilitating the timing of stopping the liquid feeding. However, even with this method, there is an undeniable possibility that a liquid may scatter or an error in the filling amount may occur due to an erroneous operation of the operator, and the operator may not be able to leave the site during the filling, resulting in a decrease in work efficiency. Was invited.

[0007]

Accordingly, the present invention provides
The purpose of the present invention is to solve the problems of the prior art, various liquids can be filled, scattering at the time of filling is prevented,
It is an object of the present invention to provide a liquid filling apparatus capable of automatically filling an accurate amount to improve the working efficiency of an operator.

[0008]

The above object is achieved by the present invention described below. That is, the first invention is a liquid filling apparatus for filling a large container with a desired amount of liquid,
A filling tank that holds a liquid to be filled, and a liquid sending unit that sends the liquid from the filling tank to the large container,
A liquid metering means for constantly or timely measuring the amount of liquid filled in the large container, and the liquid feeding means as shown in the following (1) to (3) at each of the initial stage, the middle stage and the final stage of liquid filling. And a liquid feed amount control means for controlling a liquid feed amount of the liquid by the means. (1) In the initial stage of filling, the amount of the liquid to be sent is gradually increased. (2) In the middle stage of filling, the liquid sending amount of the liquid is kept substantially constant. (3) At the end of filling, the amount of the liquid to be sent is reduced, and the liquid is stopped when the amount of the liquid stored in the large container reaches a desired amount.

According to the first aspect of the present invention, since a mass flowmeter is not used, various liquids can be filled without being affected by the viscosity, specific gravity, temperature, etc. of the liquid to be filled.
Further, according to the first aspect of the present invention, the amount of liquid to be filled is gradually increased instead of suddenly increasing at the beginning of filling, so that scattering at the time of filling is prevented, and the safety of the worker is reduced. And a favorable working environment can be secured.

Further, according to the first aspect of the present invention, the amount of liquid to be filled is reduced at the end of filling, so that the timing of completion of filling can be easily set and overfilling can be prevented.
An accurate amount of filling is possible. According to the first aspect of the present invention, since the liquid can be automatically filled, the work efficiency of the worker can be improved.

According to a second aspect of the present invention, there is provided the liquid filling apparatus according to the first aspect of the present invention, wherein the liquid sending means includes a liquid sending pipe, and a pump and a valve arranged in the middle thereof. It is characterized by. According to the second aspect of the present invention, the amount of liquid to be filled can be appropriately adjusted by controlling the pump and the valve arranged in the middle of the liquid supply pipe, and the present invention can be effectively implemented. Be transformed into

A third aspect of the present invention is the liquid filling apparatus according to the second aspect of the present invention, wherein the valve is a motor valve. Since the motor valve can be electrically opened and closed, control by the liquid supply amount control means is easy. According to the third aspect of the present invention, the present invention is effectively realized.

According to a fourth aspect of the present invention, there is provided the liquid filling apparatus according to the second or third aspect of the present invention, wherein the control of the amount of the liquid to be supplied is performed by:
The pump and the valve are operated in conjunction with each other by computer control. If the pump is operated with the valve closed, a load is applied to the pump, which may shorten the life of the pump or may cause the pump to fail. In addition, especially when the liquid supply is stopped, even if only the pump is stopped, the flow of the liquid remaining in the liquid supply pipe does not stop immediately, and the filling amount may be excessive. According to the fourth aspect of the present invention, the pump and the valve are linked to each other by computer control to control the liquid supply amount, so that the load on the pump can be appropriately reduced and the accuracy of the filling amount can be improved. .

According to a fifth aspect of the present invention, any one of the first to fourth aspects is provided.
The liquid filling apparatus according to the present invention, wherein the liquid measuring means is a mass meter. According to the fifth aspect of the present invention, since the mass meter is used as the liquid measuring means, it is not affected by the viscosity, specific gravity, temperature, etc. of the liquid to be filled, and it is possible to fill various liquids accurately. it can. Furthermore, according to the fifth aspect of the present invention, since the mass meter does not come into contact with the liquid filled in the large container, there is no problem even when the liquid is filled with a highly corrosive liquid. Even when the liquid is filled with another kind of liquid, there is no need to clean the mass meter, and in this sense, there is no selectivity of the liquid to be filled.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects,
In the liquid filling apparatus of the present invention, in the control of the liquid delivery amount of the liquid, switching from the initial filling to the middle filling, and / or switching from the middle filling to the last filling,
The measurement is performed based on the measured value by the liquid measuring means. According to the sixth aspect of the invention, the switching between the initial period of filling, the middle period of filling, and the last period of filling is performed based on the measured value by the liquid measuring means as needed, so that the amount of liquid to be supplied is appropriately controlled. can do.

According to a seventh aspect of the present invention, there is provided any one of the first to sixth aspects.
In the liquid filling apparatus according to the present invention, the switching from the initial stage of filling to the middle stage of filling in the control of the amount of liquid to be sent is such that the amount of liquid sent to and filled in the large container is 0. It is performed when it becomes 1% to 20%. Since the purpose of gradually increasing the liquid sending amount at the initial stage of filling is to prevent the liquid from scattering, it is desirable from the filling efficiency that the liquid is sent as large as possible after the degree of liquid scattering is reduced. According to the seventh aspect of the present invention, since the liquid sending amount is controlled at an appropriate timing, the large container can be efficiently filled with the liquid while exhibiting the excellent effects of the present invention.

According to an eighth aspect of the present invention, in any one of the first to seventh aspects,
In the liquid filling apparatus according to the present invention, the switching from the middle stage of filling to the last stage of filling in controlling the amount of liquid to be sent is such that the amount of liquid sent to and filled in the large container is 80% of the desired amount. Or when it reaches 96%. The reason for reducing the liquid feed rate at the end of filling is to make it easier to take the timing of filling completion and prevent overfilling,
Since the objective is to enable filling of an accurate amount, it is desirable from the filling efficiency that the liquid is sent as large as possible until the filling is completed. According to the eighth aspect of the present invention, since the liquid sending amount is controlled at an appropriate timing, the large container can be efficiently filled with the liquid while exhibiting the excellent effects of the present invention.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to preferred embodiments. FIG. 1 shows a schematic configuration diagram of a liquid filling apparatus according to an embodiment of the present invention. The liquid filling apparatus shown in FIG. 1 includes a filling tank 12 for holding a liquid 10 to be filled, a liquid sending pipe 4 connected to a lower portion of the filling tank 12 via a manual valve 16, and a liquid feeding pipe 4. From the end opposite to the manual valve 16 of the liquid sending pipe 4 to a container 20 having a capacity of 1000 liters, which is a large container.
(The target filling amount is 100
0 kg). That is, the liquid sending pipe 4, the pump 8, and the motor valve 6 constitute a liquid sending unit.

The liquid filling apparatus shown in FIG. 1 further includes a mass sensing unit 2a disposed below the container 20, and an arithmetic unit 2b for calculating the mass of the container 20 based on a signal from the mass sensing unit 2a. Is provided,
The signal of the measurement value of the mass meter 2 is configured to be sent to a computer (liquid sending amount control unit) 14 that can perform inverter control.

FIG. 2 is a side view of the vicinity of the container 20 in the liquid filling apparatus of FIG. The gantry 18 is a gantry 18
A foot 18c for supporting the whole, and a pipe-shaped support 18b
And an L-shaped pipe holding portion 18a to which the liquid sending pipe 4 is fixed.
And, it is divided into. The vertical portion of the pipe holding portion 18a is inserted into the support portion 18b, and can be moved up and down in the direction of arrow A by operating the elevating device 22.
In addition, the liquid sending pipe 4 fixed to the pipe holding portion 18a has a tip (an end opposite to the manual valve 16) 4 'facing downward, the liquid 10 is discharged from the tip, and the container 20 is discharged. Is filled.

With the pipe holding part 18a pulled up, the container 20 is placed on the mass sensing part 2a such that the opening 24 of the container 20 is located directly below the liquid sending pipe tip 4 '.
Thereafter, when the pipe holding portion 18a is lowered, the liquid sending pipe tip 4 'is located inside the container 20.

When the liquid supply is turned on by the computer 14, a signal is sent to the motor valve 6 and the pump 8, the motor valve 6 is opened, and the motor of the pump 8 starts rotating. At this time, control is performed so that the motor of the pump 8 gradually increases in rotation, that is, the amount of liquid sent by the pump 8 gradually increases. In this embodiment, for 10 seconds from the start of filling, the amount of liquid sent by the pump 8 is gradually increased until the filling amount of the liquid 10 into the container 20 becomes 20 kg (initial filling), and thereafter, the mode is switched to the fixed supply (middle filling).
Switching to quantitative replenishment (switching from the initial stage of filling to the middle stage of filling) was performed by time control. Of course, in the present invention, a signal indicating that the filling amount of the liquid 10 from the mass scale 2 into the container 20 has reached 20 kg is sent to the computer 14.
May be determined and switching may be performed. The fixed amount replenishment is performed by making the capacity of the pump 8 almost 100%.

When the filling amount of the liquid 10 into the container 20 reaches a slightly smaller amount than the desired amount, the motor of the pump 8 is turned to a low speed, that is, the pump 8 is rotated.
Is controlled so as to reduce the amount of liquid to be sent. In this embodiment, the container 2 of the liquid 10 is kept for 160 seconds from the start of filling.
A fixed amount is supplied until the filling amount to 0 becomes 980 kg (middle stage of filling), and thereafter, the mode is switched to a small amount supply (end of filling). Switching to the small amount supply (switching from the middle stage of filling to the end of filling) is performed when the filling amount of the liquid 10 into the container 20 is 980.
The signal from the mass meter 2 which reached kg was judged by the computer 14. Of course, in the present invention, the time may be controlled so that the amount of the liquid 10 filled in the container 20 becomes an appropriate amount. Pump 8 for small supply
Was performed at 30% of the maximum.

In the present embodiment, 18 minutes from the start of filling.
For 0 second, when the filling amount of the liquid 10 into the container 20 reaches the desired amount of 1000 kg, the motor valve 6 is closed and at the same time the rotation of the motor of the pump 8 is stopped. The filling is completed.

As in the present embodiment, the container 20
When the liquid 10 is filled, since the mass flow meter is not used for measuring the filling amount, the liquid 10 is hardly affected by the viscosity, specific gravity, temperature, etc. of the liquid 10 and can be filled with various liquids.
In addition, since the amount of liquid 10 to be supplied is gradually increased instead of suddenly increasing in the early stage of filling, scattering at the time of filling is prevented, and safety of the worker and a favorable working environment can be secured. . Further, since the amount of the liquid 10 to be fed is reduced at the end of filling, the timing of completion of filling can be easily set, overfilling can be prevented, and accurate filling can be performed. Since the liquid 10 can be automatically filled, the working efficiency of the worker can be improved.

A description will be given of a change in the amount of liquid to be sent in the present invention. FIG. 3 shows a time transition of the amount of liquid 10 sent in the above embodiment. In FIG. 3, the vertical axis represents the amount of liquid transfer,
The horizontal axis is the filling time. In addition, the filling time from 0 second to 10 seconds is the initial filling, and the filling time from 10 seconds to 160 seconds is the middle period,
The filling period is from 160 seconds to 180 seconds,
The area of each of the hatched areas x, y, and z represents the total amount of the liquid 10 that has been sent (filled) in each period. That is, x + y + z = 1000 kg.

As the transition of the liquid feed amount in the present invention, other preferable transitions other than the transition in the present embodiment are shown in FIGS. 4 and 6, and particularly the preferable transition in the initial stage of filling is shown in FIG. These transitions will be described together with the transitions of the present embodiment.

In the initial stage of filling, the amount of liquid supplied gradually increases with time (increases gradually), and after 10 seconds, reaches the amount of liquid supplied, which makes the capacity of the pump 8 almost 100%. In the present invention, the gradual increase of the liquid supply amount in the initial stage of filling may show a substantially linear (linear) transition as in this embodiment, but the acceleration of the liquid supply amount (liquid supply amount) with some time. (Speed at which the value increases). Specifically, as shown in the straight line of the graph in the initial stage of the filling in FIG. 4, the transition may be completely linear, but may be shifted at some distance from the straight line. ,
As a result, the switching point from the initial stage of filling to the middle stage of filling is a
It is only necessary that the liquid supply amount be Ya after seconds. Therefore, if the desired liquid transfer amount at the time of switching to the middle filling period has been reached as a result in all sections in the initial stage of filling, it is included in the concept of “gradual increase” of the liquid transfer amount in the present invention, In the above, slight fluctuations in the acceleration of the liquid feed amount are not considered.

The switching point from the initial stage of filling to the middle stage of filling is a
When the liquid supply amount at the time of switching from the initial filling period to the middle filling period is represented by Ya (kg / sec), the value of the liquid supply amount Y (kg / sec) after X seconds is as follows. It is desirable that the relationship is

[0030] (1) between the 0.1a sec to 0.5a sec is smaller than the value Y _{ma x} obtained by the following equation,
A value larger than the value Y _min obtained by the following relational expression.

[0031]

(Equation 1)

[0032] (2) between the 0.5a sec to 0.9a sec is smaller than the value Y _{ma x} obtained by the following equation,
A value larger than the value Y _min obtained by the following relational expression.

[0033]

(Equation 2)

If the above relationship is satisfied, the scattering of the liquid in the initial stage of the filling is effectively suppressed, and the temporal filling efficiency is good, which is extremely preferable. In addition,
As long as the above relationship is satisfied, even if the acceleration of the liquid supply amount fluctuates on the way or there is a time when the liquid supply amount becomes constant, it is preferable as the transition of the liquid supply amount in the initial stage of filling.

FIG. 5 is a graph showing a region where the above-mentioned preferable amount of liquid supply changes in the initial stage of filling. The straight line L is a straight line indicating a transition of an ideal liquid supply amount in which the liquid supply amount increases as a linear function from the filling start and the liquid supply amount becomes Ya after a second.
In the present invention, it is preferable that the transition of the liquid supply amount indicates a transition within a region having a certain width than the straight line. The straight lines are the straight lines indicating the above-mentioned relational expressions, respectively. From 0.1 a second to 0.9 a second, the liquid feeding amount passing through the range (shaded portion in FIG. 5) surrounded by these straight lines is shown. Showing transition is preferred in the present invention. In the figure, the slope of the graph indicates the acceleration of the amount of liquid transfer, and the greater the slope, the greater the acceleration of the amount of liquid transfer.

By the way, immediately after the start of filling, and before and after the switching from the initial stage of filling to the middle stage of filling, since the pumping amount of the pump is difficult to stabilize, between 0.1 a second from the start of filling and 0.9 a The amount of liquid transfer between seconds and a seconds is
There is no particular limitation. However, the liquid transfer amount from the start of filling to 0.1 a second is 0.16 Ya (kg / second) or less, and the liquid transfer amount from 0.9 a second to a second is Y
It is more preferably respectively less than a (kg / sec). Further, the liquid transfer amount from the start of filling to 0.1 a second is smaller than the value Y _max obtained by the above relational expression, and the liquid transfer amount from 0.9 a second to a second is Each value is more preferably larger than the value Y _min obtained by the relational expression.

In the present embodiment, the switching from the initial stage of filling to the middle stage of filling is performed 10 seconds after the start of filling and when the amount of the liquid 10 filled in the container 20 reaches 20 kg.
However, in the present invention, the switching timing is
What is necessary is just to set suitably according to the property of the liquid to be filled, the capacity / shape of the large container, etc. Specifically, the amount of the liquid sent and filled into the large container is 0.1% to 2% of the desired amount.
It is preferably performed at 0%, more preferably at 0.5% to 10%,
More preferably, it is carried out when it is between 1% and 5%.

In the middle stage of filling, the amount of liquid delivered at the beginning of filling is kept substantially constant. At this time, as shown in the above embodiment, it is preferable that the capacity of the pump 8 is made almost 100% to perform the fixed amount replenishment from the viewpoint of the time efficiency of the filling. However, if the liquid sending amount is excessively large, a problem of liquid scattering may occur even in the middle stage of filling. Therefore, when the capacity of the pump 8 is extremely large with respect to the capacity of the container 20, the liquid sending amount is increased. It is desirable to suppress it to some extent rather than the ability of In the present invention, the liquid supply amount in the middle stage of filling is a liquid supply amount in which, when the liquid is entirely filled with the liquid supply amount, the time required to reach a desired amount is 50 seconds to 500 seconds. Is desirable, 150 seconds to 350
It is more preferable to set the liquid supply amount to be seconds.
It is more desirable that the liquid transfer amount be 190 seconds.

In the present invention, "maintaining a substantially constant liquid sending amount" does not mean that the liquid sending amount is completely constant during the entire period of the middle stage of filling. In the case where the amount of liquid transfer is considered to be considered as a matter of course, even if the amount of liquid transfer is somewhat disturbed or fluctuates due to a change in the load applied to the pump or the applied voltage, etc.
Shall be included in the concept of

In the present embodiment, switching from the middle stage of filling to the end of filling is performed when the amount of the liquid 10 filled in the container 20 reaches 980 kg after 160 seconds from the start of filling. However, in the present invention, the timing of the switching may be appropriately set according to the properties of the liquid to be filled, the capacity and shape of the large container, and, more specifically, the amount of liquid sent and filled in the large container. It is preferably performed when the amount is 80% to 96% of the desired amount, more preferably when the amount is 83% to 93%,
More preferably, it is performed when it reaches 85% to 90%.

By switching from the middle stage of filling to the last stage of filling, in this embodiment, the capacity of the pump 8 is reduced to the maximum of 30 times.
% To reduce the amount of liquid 10 to be sent. Further, when the filling amount of the liquid 10 into the container 20 reaches the desired amount of 1000 kg, the motor valve 6 is closed and at the same time the rotation of the motor of the pump 8 is stopped.
That is, the liquid feeding is stopped. The transition of the liquid transfer amount during this period is as shown in the section at the end of filling in FIG. 3, but in the present invention, the transition is not limited to that shown in FIG. For example, as shown in a section at the end of filling in FIG. 4, the amount of liquid to be fed may be gradually reduced (gradually reduced) when the liquid supply is stopped, or may be shown in a section at the end of filling in FIG. 6. As described above, the liquid supply amount may be reduced (gradually reduced) over the entire section at the end of filling. In any case, it is only necessary that the amount of liquid sent immediately before the end of filling is smaller than the amount of liquid sent in the middle stage of filling so that the timing of the end of filling can be easily set and the overfilling can be prevented.

In this regard, there is no preferable transition as in the initial stage of the filling as the liquid sending amount at the end of the filling. However,
It is preferable that the amount of liquid to be sent immediately before the stop of the liquid sending becomes an amount that quickly becomes “zero” with the stop of the liquid sending. The capacity of the large container to be filled, the desired filling amount, and the pumping of the pump Since it fluctuates depending on the capacity, the amount of liquid sent in the middle stage of filling, etc., it cannot be said unconditionally.
It is preferably set to 0% or less, more preferably 30% or less, further preferably 20% or less, and particularly preferably reduced gradually.

Next, the structure of each member in the present invention will be described. In the present embodiment, a container having a capacity of 1000 liters is used as a large container to be filled with the liquid 10, but, of course, the present invention is not limited to this, and a drum (usually the filling amount is 200 liters) The liquid filling apparatus of the present invention can also be applied to a container having a larger size. The problem of scattering at the time of filling is remarkable, and the effect of the present invention can be particularly expected for a container of about 100 to 5000 liters, which is a volume that takes a long time to fill.

In the present invention, any pump may be used, but it is preferable that the pump can easily adjust the amount of liquid to be sent. Further, the capacity of the pump is not particularly limited, but if the filling time is too long, the working efficiency is reduced. Therefore, it is desirable to select an appropriate one according to the filling amount of the liquid to be filled, or to select an excess capacity with respect to the filling amount of the liquid to be filled. The use of the latter pump is preferable in that it can accommodate large-sized containers of various capacities as a liquid filling device. In this case, the liquid sending amount during the middle stage of filling is suppressed from the capacity of the pump according to the capacity of the large-sized container. Thus, it is possible to prevent the liquid being filled from scattering.

In the present embodiment, a motor valve is used as the valve (6 in FIG. 1, not including the 16 manual valves). However, the present invention is not limited to this. Any device can be used as long as it can automatically control the opening and closing of the device.
However, since the motor valve can be electrically opened and closed, control by the liquid supply amount control means is easy, and it is most preferable to use the motor valve as in the present embodiment.

In the present invention, it is desirable that the control of the pump and the valve be performed in an interlocked manner at least at the end of filling as in the present embodiment. If the pump is operated with the valve closed, a load is applied to the pump.On the other hand, when the pump stops, even if only the pump is stopped, the flow of liquid remaining in the feed pipe does not stop immediately. May be excessive. Therefore, it is desirable that the pump and the valve be operated and stopped and opened and closed in conjunction with each other. In order to control the amount of liquid supply more precisely, the pump capacity (the amount of voltage applied to the motor) and It is particularly desirable to control the degree of opening and closing of the valve in conjunction with the degree of opening and closing.

In the present embodiment, the shape of the gantry 18 is the shape shown in FIG. 2, but the present invention is not particularly limited, and there is no problem as long as the pipe can be fixed at the opening of the large container. . In addition, without specially providing a frame,
Pipes may be fixed to ceilings, beams, walls, etc. of buildings such as factories.

In this embodiment, the mass meter 2 is used as the liquid measuring means. However, the liquid measuring means in the present invention is not limited to this. For example, the liquid measuring means is filled in a large container by a liquid level meter. The volume of the liquid may be directly measured. However, since the mass meter does not come into contact with the liquid filled in the large container, there is no problem even when filling with highly corrosive liquid. Even if it is provided, there is no need to wash the mass meter, and it is possible to always fill a liquid with a desired mass irrespective of the properties such as the specific gravity of the liquid. Therefore, it is preferable to use a mass meter as the liquid measuring means.

It is preferable that the amount of liquid is measured by the liquid measuring means at all times during the entire filling process, from the viewpoint that appropriate control of the amount of liquid sent can be performed and the accurate filling amount can be ensured. The measurement may be performed intermittently or temporarily (timely performed) as long as these controls can be performed appropriately. In the present embodiment, the signal from the arithmetic unit 2b of the mass scale 2 is sent only to the computer 14, but it may be sent to an appropriate monitor so that the operator can monitor it.

In the present embodiment, the computer 14 is used for controlling the amount of liquid supplied by the switch operation or the signal from the mass meter 2, etc. If the desired operation and control can be performed, a computer or a part thereof is used. All may be by mechanical means. In the case where the amount of liquid is controlled by a computer, it is more preferable to control the amount by an inverter. In addition, in the present invention, the shape, size, structure, configuration, and the like of each member in the liquid filling device are not limited to those of the present embodiment, and may be freely changed unless the gist of the present invention is changed. Can be added.

[0051]

As described above, according to the present invention, various liquids can be filled, scattering at the time of filling can be prevented, and automatic and accurate amount of liquid can be improved in order to improve the work efficiency of the worker. A liquid filling device capable of filling can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a liquid filling device according to an embodiment of the present invention.

FIG. 2 is a side view of the periphery of a container in the liquid filling device of FIG.

FIG. 3 is a graph showing a time transition of a liquid supply amount in the embodiment of the present invention.

FIG. 4 is a graph showing an example of a time transition of a preferable liquid sending amount of the liquid in the present invention.

FIG. 5 is a graph showing a time transition of a preferable liquid sending amount of the liquid in the initial stage of filling according to the present invention.

FIG. 6 is a graph showing another example of a time transition of a preferable liquid sending amount of the liquid in the present invention.

FIG. 7 is a schematic view for explaining a conventional liquid filling method by an operator.

[Explanation of symbols]

 2, 52 Mass meter (liquid measuring means) 4, 44 Liquid supply pipe (liquid supplying means) 6 Motor valve (liquid supplying means) 8, 48 Pump (liquid supplying means) 10, 40 Liquid 12, 42 Filling tank 14 Computer ( Liquid supply amount control means) 16, 46 Manual valve 18, 58 Stand 20, 50 Container (large container) 22 Elevating device 24 Opening 54 Monitor 56 Switch

Continued on front page (72) Inventor Yasuhiro Fukuoka 1-15-1 Nihonbashi, Chuo-ku, Tokyo F-term in Nippon Parkerizing Co., Ltd. 3E018 AA01 AB06 BA07 BB09 DA02 DA05 EA01 3E083 AA20 AB04 AB30 AJ20

Claims (8)

[Claims] 1. A liquid filling device for filling a large container with a desired amount of liquid, comprising: a filling tank for holding a liquid to be filled; and a liquid sending device for sending the liquid from the filling tank to the large container. Means, a liquid metering means for constantly or clockwise measuring the amount of liquid filled in the large container, and the following steps (1) to (1) to
(3) A liquid filling device, comprising: a liquid sending amount control unit that controls a liquid sending amount of the liquid by the liquid sending unit. (1) In the initial stage of filling, the amount of the liquid to be sent is gradually increased. (2) In the middle stage of filling, the liquid sending amount of the liquid is kept substantially constant. (3) At the end of filling, the amount of the liquid to be sent is reduced, and the liquid is stopped when the amount of the liquid stored in the large container reaches a desired amount. 2. The liquid filling apparatus according to claim 1, wherein the liquid sending means includes a liquid sending pipe, and a pump and a valve arranged in the middle thereof. 3. The liquid filling apparatus according to claim 2, wherein the valve is a motor valve. 4. The liquid filling apparatus according to claim 2, wherein the control of the liquid supply amount is performed by interlocking the pump and the valve under computer control. 5. The liquid filling apparatus according to claim 1, wherein the liquid measuring means is a mass meter. 6. In the control of the amount of liquid to be sent, switching from the initial stage of filling to the middle stage of filling and / or switching from the middle stage of filling to the end of filling are performed based on the measured value by the liquid measuring means. The liquid filling device according to any one of claims 1 to 5, wherein the liquid filling device is a liquid filling device. 7. The switching from the initial stage of filling to the middle stage of filling in controlling the amount of liquid to be sent is such that the amount of liquid sent and filled into the large container is 0.1% to 20% of the desired amount.
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The liquid filling device according to any one of the above. 8. The switching from the middle filling stage to the last filling stage in the control of the amount of liquid to be sent is such that the amount of liquid sent and filled into the large container is 80% to 96% of the desired amount.
The liquid filling apparatus according to any one of claims 1 to 7, wherein the liquid filling is performed when: