JPH11105987A - Method and device for pressure filling of liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately control the filing quantity of a chemical liquid into an ampule. SOLUTION: On-off valves 13 of respective filing mechanisms 7 are opened and the filling of a chemical liquid 3 into ampule 2 is started by a control device 8. The liquid pressure of the chemical liquid is read in by the control device 8 every time when a given time is passed. The total filling amount into the ampule 2 at the point of time when the given time is passed is computed by the control device 8. The remaining amount of the chemical liquid 3 to be filled thereafter and the required time for the filling are computed based on the computed total filling amount and the set filling amount. After the computation, the on-off valves 13 of respective filling mechanisms 7 are closed when the required time elapses while the given time passes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure filling method and a pressure filling apparatus for liquids, and more particularly to a pressure filling method and a pressure filling apparatus for filling a predetermined amount in an ampoule by applying pressure to a chemical solution, for example.

[0002]

2. Description of the Related Art Heretofore, there has been known a pressure filling method of applying pressure to a chemical solution to fill an ampule (for example, Japanese Patent Publication No.
-46392). The filling method described in Japanese Patent Publication No. 46392/1992 calculates a scheduled filling end time at which a predetermined amount of filling liquid will be filled in a container based on the liquid pressure at the start of filling, and calculates the scheduled filling end time. Then, the filling by the filling mechanism is terminated.

[0003]

However, the conventional filling method described above has a drawback that when the pressure of the liquid fluctuates after the start of filling, the amount of filling in the container varies. As a method for solving such a disadvantage, a filling method disclosed in Japanese Patent Application Laid-Open No. 9-2583 has been proposed. In the method disclosed in Japanese Patent Application Laid-Open No. Hei 9-2583, the fluid pressure is measured at predetermined time intervals after the start of filling, and the filling amount up to each measured time point is calculated. The filling amount calculated for each predetermined time is sequentially added, and when the added filling amount reaches a preset filling amount, filling of the container with the filling liquid is stopped. However, in the method disclosed in Japanese Patent Application Laid-Open No. 9-2583,
Since the filling is stopped after the sequentially added total filling amount exceeds the set filling amount, there is a drawback that the amount of the filling liquid in the container after the filling is always larger than the set filling amount. In addition, when the time interval for measuring the pressure is long, there is a disadvantage that the error in the amount of the filling liquid in the container after the filling is further increased.

[0004]

[Means for Solving the Problems] In view of such circumstances,
The present invention is a pressure filling method for a liquid in which a liquid is filled in a container while applying pressure to the liquid.After the filling is started, the pressure of the liquid is sequentially detected, and the liquid pressure and the filling amount stored in advance are used. Calculate the amount of liquid filled in the container within each interval of the detection of the pressure of the liquid based on the function of, and integrate the amount of liquid calculated by those calculations to fill the container. Calculate the total filling amount of the liquid and the remaining amount to be filled from this, and calculate the time required to fill the remaining amount to be filled into the container and start measuring the filling time, The present invention provides a liquid pressure filling method in which the filling of the liquid into the container is terminated when the filling time and the filling time match. Further, a second invention provides a pressure tank for storing a liquid, a pressurizing means for pressurizing the liquid in the pressure tank, a plurality of filling mechanisms communicating with the pressure tank and having an on-off valve, and a plurality of filling mechanisms. A liquid pressure filling device comprising a control device for controlling operation and a liquid pressure sensor for detecting the pressure of the liquid and inputting the pressure to the control device, wherein the control device controls the pressure of the liquid after the start of filling. In addition to sequentially reading, based on the functions of the liquid pressure and the filling amount stored in advance, the filling amount of the liquid filled in the container is calculated for each of the liquid pressure detection intervals, and the calculated liquid is calculated. Calculate the total filling amount of the liquid filled in the container by calculating the filling amount of the container and the remaining amount to be filled from this, and calculate the time required for filling the container with the remaining amount to be filled. And start filling time measurement. And, when the required time and the filling time is matched, there is provided a pressure filling apparatus constructed liquid to terminate the filling of liquid into the container.

[0005]

According to the present invention described above, the filling amount of the filling liquid in the container can be controlled with higher precision than in the conventional case.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiment. In FIG. 1, reference numeral 1 denotes a pressure filling device, which can fill a predetermined amount of a chemical solution 3 into an ampoule 2 as a container. The pressure filling device 1 includes a pressure tank 4 for storing the chemical 3, a distribution pipe 6 communicating with the pressure tank 4 via a conduit 5, a plurality of filling mechanisms 7 connected to the distribution pipe 6,
Further, a control device 8 for controlling the operation of the filling mechanism 7 is provided. One end of a conduit 11 is connected to the pressure tank 4, and the other end of the conduit 11 is connected to a compressed air supply source (not shown). In the middle of the conduit 11, a pressure regulating valve 12
Is provided, so that compressed air having a substantially constant pressure is introduced into the pressure tank 4. Also,
Thereby, the chemical 3 in the pressure tank 4 and the distribution pipe 6
Is maintained at a substantially constant hydraulic pressure. Each filling mechanism 7 includes an on-off valve 13 and a nozzle 14 inserted into the ampule 2, and the opening and closing operation of the on-off valve 13 is controlled by the control device 8 as described later. The distribution pipe 6 is provided with a hydraulic pressure sensor 15 for detecting the liquid pressure of the chemical solution 3 therein. The hydraulic pressure in the distribution pipe 6 detected by the hydraulic pressure sensor 15 is always input to the control device 8. It has become. Further, the distribution pipe 6 is provided with a liquid temperature sensor 16 for detecting the temperature of the chemical solution 3 stored therein. The liquid temperature detected by the liquid temperature sensor 16 is also constantly input to the control device 8.

[0007] The control device 8 of the present embodiment controls the operation of each filling mechanism 7 as follows. That is,
As shown in FIG. 2, when the nozzle 14 of the filling mechanism 7 is inserted into the ampoule 2, the control device 8 synchronously opens the on-off valves 13. From this point, liquid 3 into ampoule 2
Is started (S1). The control device 8 stores in advance a set filling amount Q of the chemical solution 3 to be filled in the ampoule 2, and further, based on a function of the liquid pressure / temperature of the chemical solution 3 and the flow rate per unit time, A function of the liquid pressure / liquid temperature and the filling amount of No. 3 is stored. Then, the control device 8 changes the fluid pressure detected by the fluid pressure sensor 15 and the fluid temperature detected by the fluid temperature sensor 16 every time a predetermined time t (for example, 2/100 seconds) has elapsed since the start of filling. The data is read (S2). Each time this reading is performed, that is, each time the predetermined time t elapses, the control device 8 determines the amount of the chemical solution during the predetermined time t based on the function of the liquid pressure / temperature and the filling amount of the chemical solution 3. It is calculated whether or not 3 is filled in the ampoule 2 (S3). More specifically, the flow rate per unit time is obtained from the liquid pressure and the liquid temperature of the chemical solution 3, and the flow rate per unit time is multiplied by the predetermined time t to calculate the filling amount filled in the predetermined time t. I do. Further, the amount of the chemical solution 3 calculated this time and the amount of the chemical solution 3 calculated in the past are integrated to obtain and store the total filling amount Qx of the chemical solution 3 in the ampule 2 at the present time (S4). . Further, the control device 8 compares the total filling amount Qx of the chemical solution 3 into the ampoule 2 at the present time with the preset filling amount Q stored in advance (S
5).

Here, if the set filling amount Q and the total filling amount Q
If x is the same, the control device 8 closes the on-off valve 13 to stop the operation of the filling mechanism 7 (S
6) Then, the total filling amount Qx obtained in S4 is reset to zero (S7). After that, the process returns to S1 and the filling of the new ampule 2 is started. On the other hand, in the above S5, as a result of comparing the total filling amount Qx of the chemical solution 3 with the set filling amount Q, when the total filling amount Qx of the chemical solution 3 is smaller than the setting filling amount Q, it is necessary to continue the filling operation as it is. Therefore, the control device 8 determines the predetermined time t (2/100 seconds)
The processing from S2 to S5 is repeated every time the time has elapsed. Further, the control device 8 of the present embodiment compares the total filling amount Qx with the set filling amount Q in S5,
When it is confirmed that the total filling amount Qx of the liquid medicine is smaller than the set filling amount Q, the total filling amount Qx of the liquid medicine 2 is subtracted from the set filling amount Q, and the remaining amount of the liquid medicine 3 to be filled into the ampoule 2 is obtained. The quantity Q1 is determined (S8). If the previously obtained remaining amount Q1 is stored, it is deleted and the new remaining amount Q1 obtained in S8 is stored (S9).
Next, based on the remaining amount Q1 stored in S9 and the above function, the control device 8 determines the remaining amount Q1 stored in S9 in the ampoule 2.
The required time tx for filling the space is calculated and stored (S10). More specifically, the flow rate per unit time is obtained from the above function according to the hydraulic pressure at the end point of the predetermined time read from the hydraulic pressure sensor 15, and the remaining amount Q1 is divided by the flow rate per unit time, whereby The required time tx is calculated.
At the time when the required time tx is calculated, the measurement of the elapsed time is started by the timer (S11). At the same time, the controller 8 constantly compares the required time tx with the time measured by the timer (S12), and proceeds from S2 to S5.
From the next reading of the fluid pressure and temperature shown in
, Ie, at the predetermined time t (2/1
If the elapsed time measured by the timer reaches the end point of the required time tx while the time (00 seconds) elapses, the operation of the filling mechanism 7 is stopped at that time (S6). Thereby, the filling of the current ampule 2 is completed.

Thereafter, the control device 8 resets the total filling amount Qx integrated in S4, the required time tx, and the time measured by the timer to zero (S7), and returns to S1 to start filling a new ampoule 2. I do. On the other hand, in S12, the control device 8 constantly compares the required time tx with the time measured by the timer and compares the required time tx with the set filling amount Q from the next reading of the fluid pressure and fluid temperature shown in S2 to S5. (By the time t has elapsed).
If the elapsed time measured by the timer does not reach the required time tx, the same processing is performed again from S8 to S12. The control device 8 determines the required time t in S12.
The comparison between x and the time measured by the timer is 2/1000
We do it every second. In other words, S2 to S
In one cycle of reading the hydraulic pressure and the like in 5, ten comparisons are performed in S12. According to the above-described embodiment, the amount of filling of the ampoule 2 with the chemical solution 3 with the lapse of time after the start of filling is calculated, and the remaining amount and the required time tx are grasped every time the predetermined time t elapses. Thus, the error between the set filling amount Q and the filling amount of the chemical solution 3 actually filled in the ampoule 2 can be reduced. Therefore, the filling amount of the chemical solution 3 in the ampoule 2 can be controlled with higher accuracy than in the conventional case. Further, in the above embodiment, not only the liquid pressure of the chemical liquid but also the liquid temperature is considered in the above function, so that the filling amount of the chemical liquid 3 can be managed with higher accuracy.

(Second Embodiment) Next, FIG.
2 shows an operation control of the filling mechanism 7 according to the second embodiment. In the second embodiment, the process of S5 in the first embodiment shown in FIG. 2 is omitted, and the process of S8 is performed immediately after S4. The processing is shifted to the processing. That is, when the nozzle 14 of the filling mechanism 7 is inserted into the ampoule 2, the control device 8 synchronously opens the on-off valves 14. From this point, filling of the ampoule 2 with the drug solution 3 is started (S1). The control device 8 stores in advance a set filling amount Q of the chemical solution 3 to be filled in the ampoule 2, and also stores a function of the liquid pressure / temperature of the chemical solution 3 and the filling amount. Then, the control device 8 sets each time a predetermined time t (for example, 2/100 seconds) elapses from the start of filling,
The liquid pressure detected by the liquid pressure sensor 15 and the liquid temperature detected by the liquid temperature sensor 16 are read (S2). Each time this reading is performed, that is, each time the predetermined time t elapses, the control device 8 calculates how much chemical solution 3 has been filled in the ampoule 2 at the predetermined time t based on the function. (S3). Further, the amount of the chemical liquid 3 calculated this time and the amount of the chemical liquid 3 calculated in the past are integrated, and the total filling amount Q of the chemical liquid 3 into the ampoule 2 at the present time is calculated.
x is obtained and stored (S4).

Next, the control device 8 subtracts the total filling amount Qx of the chemical solution 3 into the ampoule 2 from the preset filling amount Q stored in advance, and calculates the remaining amount of the chemical solution 3 to be filled into the ampoule 2. Q1 is obtained (S5). When the remaining amount Q1 is obtained as described above, the filling operation needs to be continued as it is, so the control device 8 sets the predetermined time t (2/100)
The processing from S2 to S5 is repeated every time (second) has elapsed. If it is confirmed in S5 that there is the remaining amount Q1, the storage of the previously obtained remaining amount Q1 is deleted, and the newly obtained remaining amount Q1 is stored (S6). next,
The control device 8 calculates and stores the required time tx for filling the ampoule 2 with the remaining amount Q1 stored in S6 based on the remaining amount Q1 stored in S6 and the above function (S
7). At the time when the required time tx is calculated, the measurement of the elapsed time is started by the timer (S8).
At the same time, the control device 8 constantly compares the required time tx with the time measured by the timer (S9), and proceeds from S2 to S2.
5, between the next reading of the fluid pressure and the fluid temperature and the calculation of the remaining amount Q1, that is, at the predetermined time point t (2/100
If the elapsed time measured by the timer reaches the end point of the required time tx during the elapse of (second), the operation of the filling mechanism 7 is stopped at that time (S10). Thereby, the filling of the current ampule 2 is completed. Thereafter, the control device 8 determines the total filling amount Qx integrated in S4 and the required time t.
x and the time measured by the timer are reset to zero (S
11) Then, the process returns to S1 to start filling a new ampoule 2. On the other hand, in S9, the control device 8 constantly compares the required time tx with the time measured by the timer, and determines the elapsed time measured by the timer until the next remaining amount value is updated. If not,
The same processing is performed again from S6 to S9. Even in such a second embodiment, the same operation and effect as in the first embodiment can be obtained.

In each of the above embodiments, the control device 8 controls the operation of each open / close valve 13 based on a predetermined function of the liquid pressure / liquid temperature of the chemical solution 3 and the filling amount. , Hydraulic pressure
A function between the liquid pressure of the chemical solution 3 and the filling amount may be used instead of the function between the liquid temperature and the filling amount. In the above-described embodiment,
Although the hydraulic pressure sensor 15 is provided in the distribution pipe 6, the hydraulic pressure sensor 15 is provided for each filling mechanism 7, and the opening and closing of each filling mechanism 7 is controlled by the control device 8 according to the fluctuation of the hydraulic pressure of each filling mechanism 7. The valve 13 may be controlled according to the above-described embodiment. Further, in the above-described embodiment, the interval at which the control device 8 reads the hydraulic pressure is constant as the predetermined time t (2/100 seconds). However, the interval may not necessarily be the predetermined interval. That is, the first time is 2/100 seconds and the second time is 5/100 seconds.
The control device 8 may read the hydraulic pressure at appropriate intervals such as seconds and 3/100 seconds for the third time. In this case, the remaining time is the same as that of the above embodiment except that the time applied to the flow rate per unit time is not constant as in the above embodiment.

[0013]

As described above, according to the present invention, the effect that the filling amount of the filling liquid in the container can be controlled with higher precision than that of the related art can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing processing steps by a control device 8 shown in FIG.

FIG. 3 is a diagram showing processing steps performed by a control device 8 according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Pressure filling device 2 Ampoule 3 Chemical solution 4 Pressure tank 7 Filling mechanism 8 Control device 13 On-off valve 15 Liquid pressure sensor 16 Liquid temperature sensor

Claims (4)

[Claims] 1. A pressure filling method for a liquid in which a liquid is filled in a container while pressure is applied to the liquid, wherein after the filling is started, the pressure of the liquid is sequentially detected, and a liquid pressure and a filling amount stored in advance. Calculates the amount of liquid filled in the container within each liquid pressure detection interval based on the function Calculating the total filling amount of the liquid and the remaining amount to be filled from this, calculating the time required to fill the remaining amount to be filled into the container, and starting the measurement of the filling time; A pressure filling method for a liquid, wherein the filling of the liquid into the container is terminated when the time and the filling time match. 2. The method according to claim 1, wherein the function is a function that also takes into account the temperature of the liquid. 3. A pressure tank for storing a liquid, a pressurizing means for pressurizing the liquid in the pressure tank, a plurality of filling mechanisms communicating with the pressure tank and having an on-off valve, and controlling the operation of these filling mechanisms. And a liquid pressure sensor for detecting the pressure of the liquid and inputting the pressure to the control device, wherein the control device sequentially reads the pressure of the liquid after the start of filling. Calculates the filling amount of the liquid filled in the container within each interval of the detection of the liquid pressure based on the function of the liquid pressure and the filling amount stored in advance, and calculates the filling amount of the liquid obtained by the calculations. Is calculated by calculating the total filling amount of the liquid filled in the container and the remaining amount to be filled from there, and calculating the time required for filling the container with the remaining amount to be filled. Start measuring time, When the required time and the filling time match, the filling of the liquid into the container is terminated. 4. The apparatus according to claim 3, further comprising a liquid temperature sensor for detecting a temperature of the liquid and inputting the temperature to a control device, wherein the function is a function that also takes into account the temperature of the liquid. Liquid pressure filling device.