JP3879882B2 - Liquid pressure filling method and pressure filling apparatus - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a liquid pressure filling method and a pressure filling device, and more particularly, to a pressure filling method and a pressure filling device for filling a predetermined amount in an ampoule, for example, by applying pressure to a chemical solution.
[0002]
[Prior art]
Conventionally, a pressure filling method in which an ampoule is filled by applying pressure to a chemical solution is known (for example, Japanese Patent Publication No. 1-46392). The filling method of the above Japanese Patent Publication No. 1-46392 calculates the expected completion time of filling at which a predetermined amount of filling liquid will be filled into the container based on the hydraulic pressure at the start of filling, and the expected completion time of filling. Then, the filling by the filling mechanism is finished.
[0003]
[Problems to be solved by the invention]
By the way, in the conventional filling method described above, there is a drawback that the filling amount into the container varies when the pressure of the liquid fluctuates after the start of filling. As a method for solving such a defect, a filling method disclosed in JP-A-9-2583 has been proposed.
In the method disclosed in Japanese Patent Laid-Open No. 9-2583, the hydraulic pressure is measured every predetermined time after the start of filling, and the filling amount up to each measured time is calculated. Then, the filling amount calculated every predetermined time is sequentially added, and when the added filling amount becomes a preset filling amount, filling of the filling liquid into the container is stopped.
However, in the method of this Japanese Patent Laid-Open No. 9-2583, the filling is stopped after the total filling amount sequentially added exceeds the set filling amount, so the amount of the filling liquid in the container after filling is There was a drawback that it always exceeded 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 filling is further increased.
[0004]
[Means for Solving the Problems]
In view of such circumstances, the present invention is a liquid pressure filling method for filling a container in a state in which pressure is applied to the liquid, and sequentially detects the liquid pressure after the filling starts and stores it in advance. Based on the function of the liquid pressure and the filling amount, the filling amount of the liquid filled in the container is calculated for each detection interval of the liquid pressure, and the liquid filling amount obtained by the calculation is integrated. The total filling amount of the liquid filled in the container and the remaining amount to be filled are calculated, and the time required for filling the remaining amount to be filled in the container is calculated and the filling time is measured. When the required time and the filling time coincide with each other, a liquid pressure filling method is provided in which filling of the liquid into the container is terminated.
The second invention is a pressure tank for storing 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 liquid pressure filling device comprising a control device for controlling the operation and a liquid pressure sensor for detecting the pressure of the liquid and inputting the liquid pressure to the control device. The liquid obtained by sequentially reading and calculating the filling amount of the liquid filled in the container within the interval for each detection interval of the liquid pressure based on the function of the liquid pressure and the filling amount stored in advance, and calculating them. The total filling amount of the liquid filled in the container and the remaining amount to be filled are calculated from this, and the time required for filling the remaining amount to be filled in the container is calculated. In addition, the filling time measurement is opened. 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]
[Action]
According to the present invention described above, the filling amount of the filling liquid into the container can be managed with higher accuracy than in the past.
[0006]
【Example】
Hereinafter, the present invention will be described with reference to the illustrated embodiment. In FIG. 1, reference numeral 1 denotes a pressure filling device, which can fill an ampoule 2 as a container with a predetermined amount of a chemical solution 3.
The pressure filling apparatus 1 includes a pressure tank 4 for storing a chemical solution 3, a distribution pipe 6 communicating with the pressure tank 4 through a conduit 5, a plurality of filling mechanisms 7 connected to the distribution pipe 6, and further these filling mechanisms. 7 and a control device 8 for controlling the operation of 7.
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). A pressure regulating valve 12 is provided in the middle of the conduit 11 so that compressed air having a substantially constant pressure is introduced into the pressure tank 4. In addition, the chemical liquid 3 in the pressure tank 4 and the distribution pipe 6 is thereby maintained at a substantially constant liquid pressure.
Each filling mechanism 7 includes an opening / closing valve 13 and a nozzle 14 inserted into the ampoule 2, and the opening / closing operation of the opening / closing valve 13 is controlled by a control device 8 as described later.
The distribution pipe 6 is provided with a hydraulic pressure sensor 15 for detecting the hydraulic pressure of the chemical solution 3 therein, and 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 liquid 3 stored therein. The liquid temperature detected by the liquid temperature sensor 16 is also always input to the control device 8.
[0007]
Therefore, 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 opens the on-off valves 13 in synchronization. From this point, the ampule 2 is filled with the chemical 3 (S1).
The control device 8 stores in advance the set filling amount Q of the chemical solution 3 to be filled in the ampoule 2, and also uses the chemical solution 3 based on the function of the fluid pressure / temperature and the flow rate per unit time. 3 is stored as a function of the hydraulic pressure / liquid temperature and the filling amount.
Then, the control device 8 determines the liquid pressure detected by the liquid pressure sensor 15 and the liquid temperature detected by the liquid temperature sensor 16 every time a predetermined time t (for example, 2/100 seconds) has elapsed since the start of filling. It is to be read (S2).
Every time this reading is performed, that is, every time when the predetermined time t has elapsed, the control device 8 determines how much of the chemical liquid at the predetermined time t based on the function of the liquid pressure / liquid temperature and the filling amount of the chemical liquid 3. It is calculated whether 3 is filled in the ampoule 2 (S3). More specifically, the flow rate per unit time is obtained from the liquid pressure and temperature of the chemical solution 3, and the filling amount to be filled at the predetermined time t is calculated by multiplying the flow rate per unit time by the predetermined time t. To 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 ampoule 2 at the present time (S4). .
Further, the control device 8 compares the current total filling amount Qx of the chemical solution 3 into the ampoule 2 with the preset filling amount Q stored in advance (S5).
[0008]
Here, if the set filling amount Q and the total filling amount Qx are the same, the control device 8 closes the on-off valve 13 to stop the operation of the filling mechanism 7 (S6), and then S4. The total filling amount Qx obtained in the above is reset to zero (S7). Thereafter, the process returns to S1 and the filling of a new ampoule 2 is started.
On the other hand, when the total filling amount Qx of the chemical liquid 3 is smaller than the set filling amount Q as a result of comparing the total filling amount Qx of the chemical liquid 3 and the set filling amount Q in S5, it is necessary to continue the filling operation as it is. Therefore, the control device 8 repeats the processing from S2 to S5 every time when the predetermined time t (2/100 seconds) has elapsed.
Further, when the control device 8 of the present embodiment confirms that the total filling amount Qx of the chemical solution is smaller than the set filling amount Q as a result of comparing the total filling amount Qx and the set filling amount Q in the above S5. Subtracts the total filling amount Qx of the chemical solution 2 from the set filling amount Q, and obtains the remaining amount Q1 of the chemical solution 3 to be filled into the ampoule 2 (S8). If the remaining amount Q1 obtained last time is stored, it is deleted and the new remaining amount Q1 obtained in S8 is stored (S9). Next, the control device 8 calculates and stores the required time tx for filling the ampoule 2 with the remaining amount Q1 stored in S9 based on the remaining amount Q1 stored in S9 and the above function ( 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, the remaining amount Q1 is divided by the flow rate per unit time, and thereby The required time tx is calculated.
The elapsed time is measured by the timer from the time when the required time tx is calculated (S11).
At the same time, the control device 8 constantly compares the required time tx and the time measured by the timer (S12), and compares the set pressure Q from the next reading of the liquid pressure and liquid temperature shown in S2 to S5. Until the end point of the required time tx arrives until the predetermined time t (2/100 seconds) elapses until the predetermined time t (2/100 seconds) elapses. (S6). Thereby, the filling with respect to the present ampule 2 is completed.
[0009]
Thereafter, the control device 8 resets the total filling amount Qx accumulated 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.
On the other hand, in S12, the control device 8 constantly compares the required time tx and the time measured by the timer, and compares them with the set filling amount Q from the next reading of the liquid pressure and liquid temperature shown in S2 to S5. If the elapsed time measured by the timer does not reach the required time tx until the predetermined time t elapses, the same processing is performed again from S8 to S12. The control device 8 compares the required time tx in S12 with the time measured by the timer every 2/1000 seconds. In other words, the comparison is performed 10 times in S12 during one cycle of reading of the hydraulic pressure or the like in S2 to S5.
According to the above-described embodiment, the amount of filling of the chemical solution 3 into the ampoule 2 with the passage of time after the start of filling, and the remaining amount and the required time tx are grasped for each time when the predetermined time t has elapsed. Since the filling end timing is determined, the error between the set filling amount Q and the filling amount of the drug solution 3 actually filled in the ampoule 2 can be reduced. Therefore, compared with the past, the filling amount of the chemical | medical solution 3 in the ampoule 2 can be managed with high precision. Moreover, in the said Example, since not only the liquid pressure of a chemical | medical solution but liquid temperature is also considered in the said function, the filling amount of the chemical | medical solution 3 can be managed with still higher precision.
[0010]
(Second embodiment)
Next, FIG. 3 shows a second embodiment relating to the operation control of the filling mechanism 7 by the control device 8. This second embodiment is the process of S5 in the first embodiment shown in FIG. Is omitted, and the process immediately proceeds from S4 to S8.
That is, when the nozzle 14 of the filling mechanism 7 is inserted into the ampoule 2, the control device 8 opens the on-off valves 14 in synchronization. From this point, the ampule 2 is filled with the chemical 3 (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 / liquid temperature and the filling amount of the chemical solution 3.
Then, the control device 8 determines the liquid pressure detected by the liquid pressure sensor 15 and the liquid temperature detected by the liquid temperature sensor 16 every time a predetermined time t (for example, 2/100 seconds) has elapsed since the start of filling. It is to be read (S2).
At each reading, that is, every time when the predetermined time t elapses, the control device 8 calculates how much of the chemical solution 3 is filled in the ampule 2 at the predetermined time t based on the function. (S3). 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 ampoule 2 at the present time (S4). .
[0011]
Next, the control device 8 subtracts the current total filling amount Qx of the chemical solution 3 into the ampoule 2 from the preset filling amount Q, and obtains the remaining amount Q1 of the chemical solution 3 to be filled into the ampoule 2. (S5). When the remaining amount Q1 is obtained in this way, it is necessary to continue the filling operation as it is. Therefore, the control device 8 performs the above steps S2 to S5 every time when the predetermined time t (2/100 seconds) elapses. Repeat the process.
If it is confirmed in S5 that there is a remaining amount Q1, the storage of the remaining amount Q1 obtained last time 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 ( S7). Further, the elapsed time is measured by the timer from the time when the required time tx is calculated (S8).
At the same time, the control device 8 constantly compares the required time tx and the time measured by the timer (S9), and from the next reading of the fluid pressure and fluid temperature shown in S2 to S5 to the calculation of the remaining amount Q1. If the elapsed time measured by the timer reaches the end point of the required time tx while the predetermined time t (2/100 seconds) elapses, the operation of the filling mechanism 7 is stopped at that time ( S10). Thereby, the filling with respect to the present ampule 2 is completed.
Thereafter, the control device 8 resets the total filling amount Qx accumulated in S4, the required time tx, and the time measured by the timer to zero (S11), and 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 and the time measured by the timer, and the elapsed time measured by the timer until the next remaining amount value is updated becomes the required time tx. If not, the same processing is performed again from S6 to S9.
Even in the second embodiment, it is possible to obtain the same effects as those of the first embodiment described above.
[0012]
In each of the above embodiments, the control device 8 controls the operation of each on-off valve 13 based on a predetermined function of the liquid pressure / liquid temperature of the chemical liquid 3 and the filling amount. A function of the liquid pressure and the filling amount of the chemical solution 3 may be used instead of the function of the liquid temperature and the filling amount.
In the above-described embodiment, the hydraulic pressure sensor 15 is provided in the distribution pipe 6. However, the hydraulic pressure sensor 15 is provided for each filling mechanism 7, and a control device is provided according to the fluctuation of the hydraulic pressure in each filling mechanism 7. 8 may control the on-off valve 13 of each filling mechanism 7 in accordance with the above-described embodiment.
Furthermore, in the above embodiment, the interval at which the control device 8 reads the hydraulic pressure is constant as the predetermined time t (2/100 seconds), but it does not necessarily have to be the predetermined interval. That is, the controller 8 may read the hydraulic pressure at appropriate elapsed times, such as 2/100 seconds for the first time, 5/100 seconds for the second time, and 3/100 seconds for the third time. good. In this case, the rest is the same as in the above embodiment, except that the time required for the flow rate per unit time is not constant as in the above embodiment.
[0013]
【The invention's effect】
As described above, according to the present invention, it is possible to obtain an effect that the filling amount of the filling liquid into the container can be managed with higher accuracy than in the past.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an embodiment of the present invention. FIG. 2 is a diagram showing processing steps by a control device 8 shown in FIG. 1. FIG. 3 is a control device according to another embodiment of the present invention. Diagram showing processing steps 【Explanation of symbols】
DESCRIPTION OF SYMBOLS 1 Pressure filling apparatus 2 Ampoule 3 Chemical liquid 4 Pressure tank 7 Filling mechanism 8 Control apparatus 13 On-off valve 15 Hydraulic pressure sensor 16 Liquid temperature sensor

Claims (4)

A liquid pressure filling method for filling a container with pressure applied to the liquid,
After the filling starts, the liquid pressure is sequentially detected, and the filling amount of the liquid filled in the container is calculated at each liquid pressure detection interval based on the function of the liquid pressure and the filling amount stored in advance. And
The total amount of liquid filled in the container and the remaining amount to be filled are calculated by adding up the liquid filling amounts obtained by the calculation, and the remaining amount to be filled is filled in the container. Calculate the time required to start and start measuring the filling time,
When the required time and the filling time coincide with each other, the filling of the liquid into the container is terminated. 2. The liquid pressure filling method according to claim 1, wherein the function is a function in consideration of the temperature of the liquid. A pressure tank for storing 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 control device for controlling the operation of these filling mechanisms; A liquid pressure filling device including a liquid pressure sensor that detects a liquid pressure and inputs the pressure to the control device;
The controller sequentially reads the pressure of the liquid after the start of filling, and at the interval of detecting the pressure of the liquid based on the function of the liquid pressure and the filling amount stored in advance, the liquid filled in the container within that interval. Calculate the filling amount,
The total amount of liquid filled in the container and the remaining amount to be filled are calculated by adding up the liquid filling amounts obtained by the calculation, and the remaining amount to be filled is filled in the container. Calculate the time required to start and start measuring the filling time,
When the required time and the filling time coincide with each other, the filling of the liquid into the container is terminated. 4. The liquid pressure filling apparatus according to claim 3, further comprising a liquid temperature sensor that detects the temperature of the liquid and inputs the detected temperature to the control device, and the function is a function that also takes into account the temperature of the liquid. .

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