Liquid medicine filling control system, filling system and control method

Abstract

The invention discloses a liquid medicine filling control system. The system comprises a control unit and a flow sensor, wherein the flow sensor is used for detecting the flow rate or the volume of aliquid medicine in real time, and the control unit is used for obtaining actual filling quantity L1 according to the flow rate or the volume of the liquid medicine so as to calibrate a filling processof a filling pump. The invention further discloses a liquid medicine filling system. The system comprises a liquid storage device, the filling pump, a filling head and the control system above, wherein the filling pump is connected with the liquid storage device, and the filling head is connected with the filling pump through a filling pipeline. The invention further discloses a control method. The method comprises the following steps that the flow rate of the liquid medicine is detected during being loaded, so that the actual filling quantity L1 of a medicine bottle is obtained, then a difference value A between the preset target filling quantity L and the L1 is obtained, and the single filling process of the filling pump is calibrated through the difference value A. The invention further discloses the liquid medicine filling control system for executing the control method. The liquid medicine filling control system, the filling system and the control method have the advantages of being high in filling precision, high in efficiency and the like.

Description

technical field [0001] The invention mainly relates to the technical field of medicine and food packaging, in particular to a liquid medicine filling control system, a filling system and a control method. Background technique [0002] At present, in the pharmaceutical industry, volumetric pumps are usually used for liquid medicine filling. For the measurement and calibration of liquid medicine loading, it is generally used to obtain the quality of the medicine liquid by weighing the medicine bottle before and after filling, and then convert it into The method of volume filling is used to obtain the actual filling volume of the medicine bottle, and then the obtained actual loading volume is compared with the set loading volume, and the calibration is realized according to the difference between the two. For example, it is disclosed in the patent document CN102460091B that the empty container is weighed by the first weighing device, and the container filled with the product is...

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Problems solved by technology

[0004] Because the weighing system has very high environmental requirements and installation accuracy requirements, and its own complex structure, high manufacturing cost, troublesome installation and debugging, and many auxiliary devices, including antistatic devices, shock absorbers, weighing channels and driving devices etc., so the combined cost of the whole weighing system is very high

Such as the structure of the first weighing device in the patent document CN102460091B, the structure of the second weighing device and the related transmission device are complex and costly

[0005] 2. The production efficiency is low, and there is a risk of unqualified loading

Therefore, running the weighing system takes a lot of production time, which greatly reduces the production capacity of the equipment and reduces production efficiency. On the premise of ensuring the production capacity, when using the weighing system to verify the filling volume of the filling pump, only sampling weighing can be used for calibration , there is a risk of producing substandard drugs

For example, in the patent document CN102460091B, it is necessary to weigh the empty bottle and the filled bottle separately, which not only affects the filling efficiency, but also affects the conveying efficiency

[0007] 3. The loading volume obtained is inaccurate

But first, the composition of the medicine is complex, and many liquid medicines are mixed before filling, so it is difficult to obtain the accurate density of the liquid medicine; High, but this kind of electronic scale also has very high environmental requirements, such as machine vibration, 100-level laminar flow, surrounding magnetic field, static electricity generated during liquid medicine filling, etc. will affect the accuracy of weighing

The above two factors lead to the accuracy of the loading can not be guaranteed

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