CN109178376A - A kind of filling pressure control method and equipment - Google Patents
A kind of filling pressure control method and equipment Download PDFInfo
- Publication number
- CN109178376A CN109178376A CN201811217650.6A CN201811217650A CN109178376A CN 109178376 A CN109178376 A CN 109178376A CN 201811217650 A CN201811217650 A CN 201811217650A CN 109178376 A CN109178376 A CN 109178376A
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- filling
- pressure
- valve
- surge tank
- liquid
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- 238000011049 filling Methods 0.000 title claims abstract description 161
- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 89
- 239000012530 fluid Substances 0.000 claims abstract description 51
- 238000001802 infusion Methods 0.000 claims abstract description 32
- 230000006837 decompression Effects 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 239000003814 drug Substances 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000012371 Aseptic Filling Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000002637 fluid replacement therapy Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B3/04—Methods of, or means for, filling the material into the containers or receptacles
- B65B3/10—Methods of, or means for, filling the material into the containers or receptacles by application of pressure to material
- B65B3/14—Methods of, or means for, filling the material into the containers or receptacles by application of pressure to material pneumatically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B3/003—Filling medical containers such as ampoules, vials, syringes or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B3/04—Methods of, or means for, filling the material into the containers or receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B57/00—Automatic control, checking, warning, or safety devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
- B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
- B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
- B67C3/06—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus using counterpressure, i.e. filling while the container is under pressure
- B67C3/12—Pressure-control devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
- B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
- B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
- B67C3/22—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
- B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
- B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
- B67C3/22—Details
- B67C3/26—Filling-heads; Means for engaging filling-heads with bottle necks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
- B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
- B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
- B67C3/22—Details
- B67C3/28—Flow-control devices, e.g. using valves
Abstract
The present invention provides a kind of filling pressure control method and equipment, intake valve and exhaust valve are set at the top of surge tank, the constant voltage device of front buffer is wherein configured on the air inlet pipeline of the intake valve connection, described exhaust valve one end connects surge tank, the other end connects throttle valve to be exhausted, tank bottom sets filling liquid outlet, several filling valves are arranged in the outlet end, pressure transmitter is set between the filling valve and the outlet of surge tank, the side of surge tank lower part sets liquid inlet, inlet sets liquid feed valve, the compress control method specifically includes the early-stage preparations stage, pressure period, decompression phase, the filling stage, five stages of fluid infusion stage.The compress control method can be can be realized multiple filling by a fluid infusion, its influence that not will receive medical fluid liquid level in compressed air gas source pressure oscillation and surge tank, filling speed is fast and filling accuracy is higher, and filling accuracy can be increased within ± 1%.
Description
Technical field
The invention belongs to filling automation fields, and in particular to a kind of filling pressure control method and equipment.
Background technique
Aseptic filling technology is a kind of new production technology generated in recent years, produces cold-aseptic filling production therewith
Line.Blowing encapsulation technology is a kind of sterile packaged technology, which usually can once produce tens of (20~60) products, due to filling
It is more to fill head number, and in order to realize clean-in-place (CIP) and on-the-spot disinfection (SIP), what is generallyd use is that time pressure method is filling,
I.e. under certain filling pressure, loading amount is controlled by controlling the opening time of filling valve.
The source of filling pressure is usually that compressed air is used to be pressurizeed in medical fluid surge tank to realize, existing to blow encapsulating
Equipment is usually to directly adopt compressed air pressure reducing valve to adjust the pressure inflated in surge tank to control filling pressure, such as now
There is technology CN201620333432.9 just to disclose a kind of filling apparatus, and in particular to a kind of for blowing the high-precision of encapsulation all-in-one machine
Bulking system, including medical fluid surge tank and liquidometer are spent, the liquidometer corresponds to the setting of medical fluid surge tank, slow for measuring medical fluid
Medical fluid liquid level in tank is rushed, drug-feeding tube, air inlet pipe and evacuated tube is respectively set at the top of the medical fluid surge tank, is set on the drug-feeding tube
It sets into medicine valve, intake valve and pressure reducing valve is set in the air inlet pipe, exhaust-valve, the medical fluid surge tank are set in the evacuated tube
Bottom is connected to filling solenoid valve block, compress control method by filling tube are as follows: filling --- fluid infusion (while exhaust-valve is arranged
Gas) --- pressurization (intake valve tonifying Qi) --- filling.
However, the pressure control of this mode will receive medical fluid liquid level height in compressed air gas source pressure oscillation and surge tank
The influence of degree, and the included pressure gauge of pressure reducing valve measures inaccuracy, the essence of filling pressure to pressure when due to pressurization tonifying Qi
Spend not high, be typically only capable to reach ± 2.5% (loading amount 10ml or less), and the precision of this filling pressure be unable to satisfy it is some special
The filling demand of product.
Summary of the invention
(1) technical problems to be solved
In view of the drawbacks of the prior art, the present invention provides a kind of filling pressure control method and its equipment, pressure controls
Method processed can be can be realized multiple filling by a fluid infusion, not will receive compressed air gas source pressure oscillation and buffering
The influence of medical fluid liquid level in tank, filling speed is fast, and by the fine tuning control of pressurization decompression, so that of the invention is filling
Compress control method and equipment can break through the bottleneck of existing filling pressure control, can be by filling essence using new control method
Degree is increased within ± 1%.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include:
The present invention provides a kind of filling pressure control method, intake valve and exhaust valve are set at the top of surge tank, wherein institute
The constant voltage device that front buffer is configured on the air inlet pipeline of intake valve connection is stated, described exhaust valve one end connects surge tank, separately
One end connects throttle valve to be exhausted, and tank bottom sets filling liquid outlet, several filling valves are arranged in the outlet end, described filling
Pressure transmitter is set between valve and the outlet of surge tank, the side of surge tank lower part sets liquid inlet, and inlet sets liquid feed valve,
It is characterized in that, the compress control method includes the following steps S1~S5:
S1, early-stage preparations stage: the gas when pressure value of the setting of the constant voltage device is higher than filling starting point in surge tank
Body pressure value presets intake valve, exhaust valve, filling valve and liquid feed valve all in closed state；
S2, pressure period: opening intake valve, and the gas pressure in tank to be buffered closes intake valve after stablizing；
S3, decompression phase: opening exhaust valve, until when pressure transmitter detects that pressure value and filling setting in pipe are pressed
Exhaust valve is closed when force value is consistent；
S4, filling stage: the filling valve is controlled by pour-in controller and opens certain time, filling liquid quantitative is infused
Enter into container below, and subsequently determine whether the liquid level of surge tank reaches preset lower limit value, if it is not, being then transferred to step
S2 carries out pressurization tonifying Qi, if so, thening follow the steps S5 carries out fluid infusion；
S5, fluid infusion stage: if judge that the liquid level of surge tank reaches preset lower limit value, at intake valve and liquid inlet
The liquid feed valve is opened, and liquid is injected into surge tank, the institute of liquid inlet when liquid level reaches preset upper limit value
It states liquid feed valve and intake valve is closed, to stop feed liquor, and transfer to execute step S3.
Further, the filling liquid in the surge tank is specially medical fluid.
Further, the intake valve stabilization that intake valve is closed after the gas pressure in surge tank described in step S2 is stablized is opened
Opening the time is 1~2s.
Further, the throttle valve is adjusted in S1 step to aperture appropriate, with meet can in step S3 1~
Pressure inside the tank is stablized in filling setup pressure value in 2s.
Further, the liquid level in surge tank is monitored by meausring apparatus, surge tank is placed on meausring apparatus, with judgement
Whether its liquid level reaches the preset lower limit value and upper limit value.
Further, the liquid level in surge tank is monitored by liquidometer, to judge it is described preset whether its liquid level reaches
Lower limit value and upper limit value.
Further, the constant voltage device concrete type is pressure reducing valve or constant-pressure tank.
Further, the quantity of the filling valve is 20~60.
Further, when the pressure value of the setting of the constant voltage device in step S1 is than the filling starting point in surge tank
The big 0.01~0.05bar of gas pressure value.
Further, the pour-in controller is PLC or single-chip microcontroller.
In addition, the present invention also provides a kind of filling pressures to control equipment, control equipment includes: at least one processor,
And at least one processor being connect with the processor communication, in which: the memory is stored with can be by the processor
The program instruction of execution, the processor call described program instruction to be able to carry out pressure controlling party described in any one of the above
Method.
(3) beneficial effect
As shown from the above technical solution, compared with the existing technology, the present invention have it is following the utility model has the advantages that
1) the application is depressurized again using new pressurization and (is finely tuned, that is, pressure reducing valve pressure is slightly above filling setting pressure when pressurizeing
Value) two sections of compress control methods, and fully taken into account the gravity pressure of liquid, and its filling pressure precision can pass through
Pressure transmitter more higher than pressure gauge detection accuracy on pressure reducing valve guarantees, therefore the control of the pressure of the application is more accurate, pressure
Power controls the reachable ± 0.001bar of precision；
2) the filling control method of the application be different from the prior art: the application be every time it is filling before carry out " pressurization ---
Decompression " operation, and the prior art be every time it is filling before need to carry out " decompression-pressurization while fluid infusion " operation, therefore the application
This pressure controling mode avoids pressure reducing valve rear end pressure change caused by compressed air gas source pressure oscillation to filling pressure
The influence of power, and filling pressure test point is located at the position of filling valve upstream vicinity, has included pressure caused by medical fluid is self-possessed,
Therefore the influence of medical fluid liquid level in compressed air gas source pressure oscillation and surge tank is not will receive, and surge tank superfeed pressure omits
Higher than filling pressure, exhaust process exhaust velocity tune is obtained by throttle valve it is very slow, therefore can be within a short period of time filling pressure
Power is controlled to setting value, and filling preceding required time is shorter, and filling speed is fast, and spent gas source is less；
3) fluid infusion of the application controls different: the application opens intake valve while fluid infusion, can pass through pressure reducing valve
Overflow port discharge excessive gas and realize rapid fluid replacement tonifying Qi, thus the pressure after the completion of the liquid replenishing method fluid infusion of the application with
The setting pressure of pressure reducing valve is identical, and due to balancing pressure by opening exhaust-valve when prior art fluid infusion, therefore every time after fluid infusion
Requiring repressurization just can guarantee pressure, and the pressure filling of the prior art is that every filling will once mend a not good liquor and can fill
Dress, and the pressure filling of the application can be can be realized by a fluid infusion it is multiple filling, until the liquid level in surge tank reaches
Just need to carry out fluid infusion again when to preset lower limit value, therefore the operation of the application is more easy.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 is the flow chart of filling pressure control method of the invention；
Fig. 2 is filling pressure control system schematic diagram of the invention；
Fig. 3 is filling pressure control system pressure period medium flow graph of the invention；
Fig. 4 is filling pressure control system decompression phase medium flow graph of the invention；
Fig. 5 is the filling stage medium flow graph of filling pressure control system of the invention；
Fig. 6 is filling pressure control system fluid infusion stage medium flow graph of the invention.
Description of symbols: BT1, medical fluid surge tank；WS1, electronic scale；V01, liquid feed valve；V02, intake valve；V03, exhaust
Valve；V04, throttle valve；V05~V10, filling valve；PR1, pressure reducing valve；PG1, pressure gauge；PG2, pressure transmitter.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Embodiment one:
As shown in the flow chart of the filling pressure control method of Fig. 1, the embodiment of the present invention one discloses a kind of filling pressure
Control method sets intake valve and exhaust valve at the top of surge tank, wherein being configured on the air inlet pipeline of the intake valve V01 connection
The constant voltage device of front buffer, described exhaust valve one end connect surge tank, and the other end connects throttle valve to be exhausted, and tank bottom is set
Several filling valves are arranged in filling liquid outlet, the outlet end, and pressure is arranged between the filling valve and the outlet of surge tank and becomes
Device is sent, the side of surge tank lower part sets liquid inlet, and inlet sets liquid feed valve, which is characterized in that the compress control method packet
Include following steps S1~S5:
S1, early-stage preparations stage: the pressure value of the setting of the constant voltage device is higher than filling setup pressure value, presets air inlet
Valve, exhaust valve, filling valve and liquid feed valve are all in closed state；
S2, pressure period: opening intake valve, and the gas pressure in tank to be buffered closes intake valve after stablizing；
S3, decompression phase: opening exhaust valve, until when pressure transmitter detects that pressure value and filling setting in pipe are pressed
Exhaust valve is closed when force value is consistent；
S4, filling stage: the filling valve is controlled by pour-in controller and opens certain time, filling liquid quantitative is infused
Enter into container below, and judge whether the liquid level of surge tank reaches preset lower limit value, if it is not, then jump to step S2 into
Row pressurization tonifying Qi, if so, thening follow the steps S5 carries out fluid infusion；
S5, fluid infusion stage: if judge that the liquid level of surge tank reaches preset lower limit value, at intake valve and liquid inlet
The liquid feed valve is opened, and liquid is injected into surge tank, the institute of liquid inlet when liquid level reaches preset upper limit value
It states liquid feed valve and intake valve is closed, to stop feed liquor, and transfer to execute step S3.
Embodiment two:
As shown in figures 2-6, present invention combination early-stage preparations stage, pressure period, decompression phase, filling stage, fluid infusion rank
The state of each equipment further illustrates the filling pressure control method in above-mentioned flow chart when section.
As shown in Fig. 2, the present processes are realized in the filling pressure control system of Fig. 2, the filling pressure control
System processed includes surge tank BT1, liquid feed valve V01, intake valve V02, exhaust valve V03, throttle valve V04, several filling valves V05
~V10, pressure reducing valve PR1, pressure gauge PG1, pressure transmitter PG2, electronic scale WS1, container, herb liquid surge tank BT1 are placed
In on an electronic scale WS1, by the liquid level that can be monitored in medical fluid surge tank BT1 of weighing, set at the top of surge tank BT1 into
Air valve V02 and exhaust valve V03, wherein being configured with pressure reducing valve PR1, compressed air on the air inlet pipeline of the intake valve V02 connection
By entering intake valve V02 after pressure reducing valve PR1, equipped with its included pressure gauge PG1, PG1 for measuring on pressure reducing valve PR1
The downstream pressure reducing valve PR1 end pressure, the one end the exhaust valve V03 connect surge tank BT1, and the exhaust valve V03 other end connects throttle valve
To be exhausted, throttle valve V04 connects in the rear end V03 V04, and tank bottom sets filling liquid outlet, and it is filling that several are arranged in the outlet end
The outlet of valve V05~V10, the filling valve V05~V10 (quantity of filling valve is usually 20~60) and surge tank BT1 it
Between be arranged pressure transmitter PG2, specifically can close to filling valve upstream position nearby install pressure transmitter PG2, surge tank BT1
Lower left quarter side set liquid inlet, inlet sets liquid feed valve V01, in addition, as shown in Fig. 2, its liquid specifically can be medical fluid,
Container can be medicine bottle, pressure reducing valve PR1 concretely overflow type pressure reducing valve.
The schematic diagram of automatic filling control system based on Fig. 2, the side that the present invention is vented again using tonifying Qi first in surge tank BT1
Formula is consistent come the pressure for guaranteeing each filling starting point, and exhausting loop uses closed-loop control.Each superfeed pressure is slightly above setting
In setting pressure, therefore filling pressure can stablize pressure within a short period of time then by the accurate control to exhausting loop
Can control filling pressure accurately, to improve filling accuracy, the compress control method includes the following steps S1~S5,
Specific medium flow graph can be found in Fig. 3~6, and Fig. 3~6 respectively correspond step S2-S5:
S1, early-stage preparations stage: pressure reducing valve PR1 and throttle valve V04 are always on, the pressure value of the setting of pressure reducing valve PR1
Higher than filling starting point (i.e. the filling stage start carry out fill operations before, the pressure registration of pressure transmitter PG2 is equal at this time
Filling setup pressure value, meet open filling valve carry out filling condition) when surge tank in gas pressure value 0.01~
0.05bar, throttle valve V04 are adjusted to aperture appropriate, with meet in 1~2s can stabilized filling pressure, preset intake valve,
Exhaust valve, filling valve and liquid feed valve are all in closed state；
S2, pressure period: the medium flow graph operated referring to the pressurization tonifying Qi of Fig. 3 is it is found that when the last filling stage
After the completion, i.e. after filling valve V05~V10 is all closed, full admission valve V02, is closed, at this time liquid after 1~2S stablizes immediately
Gas pressure in body surge tank BT1 is identical as the pressure value that the pressure reducing valve PR1 is set；
S3, decompression phase: the medium flow graph of decompression exhaust operation referring to fig. 4 is it is found that work as liquid feed valve V01 and intake valve
When V02 is in close state, and within filling idle hours, the pressure value that the pressure transmitter PG2 is detected is higher than
Pressure value to be shown needed for pressure transmitter PG2 when filling starting point (is known as filling setup pressure value, when the filling starting point afterwards
Pressure transmitter PG2 needed for pressure value to be shown be a definite value according to set by filling process demand, at filling
When point, which is equal to the gas pressure value in surge tank described in step S1 and is produced with based on medical fluid self weight
The summation of raw pressure value), then standard-sized sheet exhaust valve V03, passes through exhaust valve V03 and throttling for air extra in surge tank BT1
Valve V04 is slowly discharged, and pressure detected by the pressure transmitter PG2 is gradually reduced at this time, when pressure transmitter PG2 is detected
Exhaust valve V03 is closed when the pressure value arrived is consistent with filling setup pressure value；
S4, filling stage: referring to the medium flow graph of the fill operations of Fig. 5 it is found that working as the intake valve V02 and exhaust valve
After V03 is all in closed state, the filling valve V05~V10 is controlled by PLC controller or single-chip microcontroller and opens a timing
Between, filling liquid quantitative is injected into container below (at this time in pouring process, filling pressure can be gradually reduced), with
Afterwards under filling valve closing state, judgement judges whether the liquid level of surge tank reaches preset lower limit value by electronic scale WS1, if
It is no, then it jumps to step S2 and continues tonifying Qi of pressurizeing, if so, thening follow the steps S5 carries out feed liquor pressurization；
S5, fluid infusion stage: the medium flow graph operated referring to the fluid infusion of Fig. 6 is it is found that under filling valve closing state, if electric
When son claims WS1 detection liquid level to reach preset lower limit value, the liquid feed valve V01 at liquid inlet is opened, while intake valve V02
It opens, liquid is injected into surge tank BT1, and carries out tonifying Qi pressurization simultaneously, and the addition of liquid will lead in surge tank at this time
Pressure rise, if there is extra gas, can reverses through the intake valve V02 then pass through the pressure reducing valve PR1 overflow
Head piece discharge, when the liquid level of liquid in surge tank BT1 reaches preset upper limit value, the liquid feed valve V01 of liquid inlet and
Intake valve V02 is closed, and to stop feed liquor, the gas pressure at this time in surge tank BT1 is consistent with the pressure value that pressure reducing valve is set.
In addition, the application judges liquid level except through electronic scale WS1, liquid level, liquid level can also be judged by liquidometer
Meter can be existing various liquidometers, such as pressure type, maglev type, ultrasonic level gage, and as existing for constant voltage device
Pressure reducing valve also could alternatively be the decompression constant voltage device of constant-pressure tank etc.
It is noted that requiring to carry out tonifying Qi stage and exhaust phase before the present invention is filling every time, using first tonifying Qi
The mode that body is vented again come control it is filling before initial pressure, exhaust process use closed-loop control, to stablize filling pressure, exhaust
The rear end valve V03 is equipped with throttle valve V04, is adjusted the speed of exhaust, and the fluid infusion stage is only when liquid level is too low in surge tank
Carry out, not every time it is filling before will fluid infusion.
In order to protrude inventive concept of the invention, the present invention is using prior art CN201620333432.9 as referring to right
As, finally it is to be emphasized again that claimed technical solution of the invention have it is following the utility model has the advantages that
1) the application is depressurized again using new pressurization and (is finely tuned, that is, pressure reducing valve pressure is slightly above filling setting pressure when pressurizeing
Value) two sections of compress control methods, and its filling pressure precision can be by more than the pressure gauge detection accuracy on pressure reducing valve
High pressure transmitter come guarantee (often detection accuracy is low for the included pressure gauge of pressure reducing valve, and pressure transmitter generally as
One independent detection device, detection accuracy are higher), therefore the control of the pressure of the application is more accurate, pressure controling precision is reachable
±0.001bar；
2) the filling control method of the application be different from the prior art: the application be every time it is filling before carry out " pressurization ---
Decompression " operation, and the prior art be every time it is filling before need to carry out " decompression-pressurization while fluid infusion " operation, therefore the application
This pressure controling mode avoids pressure reducing valve rear end pressure change caused by compressed air gas source pressure oscillation to filling pressure
The influence of power, and filling pressure test point is located at the position of filling valve upstream vicinity, has included pressure caused by medical fluid is self-possessed,
Therefore the influence of medical fluid liquid level in compressed air gas source pressure oscillation and surge tank is not will receive, and surge tank superfeed pressure omits
Higher than filling pressure, exhaust velocity is adjusted by throttle valve for exhaust process, therefore can be within a short period of time filling pressure
Power is accurately controlled filling setting value, and filling preceding required time is shorter, and filling speed is fast, and spent gas source is more
It is few；
3) fluid infusion of the application controls different: the application opens intake valve while fluid infusion, can pass through pressure reducing valve
Overflow port discharge excessive gas and realize rapid fluid replacement tonifying Qi, thus the pressure after the completion of the liquid replenishing method fluid infusion of the application with
The setting pressure of pressure reducing valve is identical, and due to balancing pressure by opening exhaust-valve when prior art fluid infusion, therefore every time after fluid infusion
Requiring repressurization just can guarantee pressure, the pressure filling of the prior art be every filling will once mend a not good liquor can be into
Row is filling, and multiple filling, the liquid in surge tank can be realized in the pressure filling of the application by a fluid infusion
Position just needs to carry out fluid infusion again when reaching preset lower limit value, therefore the operation of the application is more easy.
The present invention by above-mentioned compress control method be adequately utilized in automatic filling control system the control of each device or
Person detects characteristic, and is adequately organically combined pressurization decompression method together with the liquid replenishing method of automatic filling control system,
It saves operation sequence and improves filling time, comprehensive other all factors together, finally make filling accuracy controllable
System is within ± 1%, the reachable ± 0.001bar of pressure controling precision.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of filling pressure control method, intake valve and exhaust valve are set at the top of surge tank, wherein intake valve connection
The constant voltage device of front buffer is configured on air inlet pipeline, described exhaust valve one end connects surge tank, and the other end connects throttle valve
To be exhausted, tank bottom sets filling liquid outlet, and the outlet end is arranged several filling valves, and the filling valve and surge tank go out
Pressure transmitter is set between mouthful, the side of surge tank lower part sets liquid inlet, and inlet sets liquid feed valve, which is characterized in that institute
It states compress control method and includes the following steps S1~S5:
S1, early-stage preparations stage: the gas pressure when pressure value of the setting of the constant voltage device is higher than filling starting point in surge tank
Force value presets intake valve, exhaust valve, filling valve and liquid feed valve all in closed state；
S2, pressure period: opening intake valve, and the gas pressure in tank to be buffered closes intake valve after stablizing；
S3, decompression phase: opening exhaust valve, until when pressure transmitter detects pressure value and filling setup pressure value in pipe
Exhaust valve is closed when consistent；
S4, filling stage: the filling valve is controlled by pour-in controller and opens certain time, filling liquid quantitative is injected into
In container below, and subsequently determine whether the liquid level of surge tank reaches preset lower limit value, if it is not, be then transferred to step S2 into
Row pressurization tonifying Qi, if so, thening follow the steps S5 carries out fluid infusion.
S5, fluid infusion stage: described at intake valve and liquid inlet if judge that the liquid level of surge tank reaches preset lower limit value
Liquid feed valve is opened, and liquid is injected into surge tank, when liquid level reaches preset upper limit value described in liquid inlet into
Liquid valve and intake valve are closed, and to stop feed liquor, and transfer to execute step S3.
2. control method according to claim 1, which is characterized in that the filling liquid in the surge tank is specially medicine
Liquid.
3. control method according to claim 1, which is characterized in that the gas pressure in surge tank described in step S2 is steady
The intake valve that intake valve is closed after fixed stablizes the opening time as 1~2s.
4. control method according to claim 1, which is characterized in that the throttle valve is adjusted in S1 step to appropriate
Aperture can be stablized pressure inside the tank in filling setup pressure value in 1~2s in step S3 with meeting.
5. control method according to claim 1, which is characterized in that the liquid level in surge tank is monitored by meausring apparatus,
Surge tank is placed on meausring apparatus, to judge whether its liquid level reaches the preset lower limit value and upper limit value.
6. control method according to claim 1, which is characterized in that the liquid level in surge tank is monitored by liquidometer, with
Judge whether its liquid level reaches the preset lower limit value and upper limit value.
7. control method according to claim 1, which is characterized in that the constant voltage device concrete type be pressure reducing valve or
Constant-pressure tank.
8. control method according to claim 1, which is characterized in that the quantity of the filling valve is 20~60.
9. control method according to claim 1, which is characterized in that the pressure of the setting of the constant voltage device in step S1
Big 0.01~the 0.05bar of gas pressure value when force value is than the filling starting point in surge tank.
10. a kind of filling pressure controls equipment characterized by comprising
At least one processor, and at least one processor being connect with the processor communication, in which: the memory is deposited
The program instruction that can be executed by the processor is contained, the processor calls described program instruction to be able to carry out such as claim
Filling pressure control method described in 1-9 any one.
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| CN201811217650.6A CN109178376B (en) | 2018-10-18 | 2018-10-18 | Filling pressure control method and equipment |
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| CN201811217650.6A CN109178376B (en) | 2018-10-18 | 2018-10-18 | Filling pressure control method and equipment |
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| CN109178376B CN109178376B (en) | 2020-10-20 |
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Cited By (4)
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| CN110254770A (en) * | 2019-06-17 | 2019-09-20 | 江苏新美星包装机械股份有限公司 | A kind of sterile buffer tank filling containing fruit squash |
| WO2020220752A1 (en) * | 2019-04-30 | 2020-11-05 | 楚天科技股份有限公司 | Liquid medicine filling control system, filling system, and control method |
| CN111948112A (en) * | 2020-08-10 | 2020-11-17 | 盐城新海川机电科技有限公司 | Penetrating fluid constant-pressure quantitative supply method and device |
| CN112758372A (en) * | 2020-12-30 | 2021-05-07 | 武汉交通职业学院 | Automatic filling equipment for formed alkali liquor and filling method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109178376B (en) | 2020-10-20 |
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Application publication date: 20190111 Assignee: Changsha Pharmaceutical Equipment Industrial Technology Research Institute Co.,Ltd. Assignor: TRUKING TECHNOLOGY Ltd. Contract record no.: X2023980051833 Denomination of invention: A filling pressure control method and equipment Granted publication date: 20201020 License type: Common License Record date: 20231213 |