Eye drop filling control device without pollution source

Abstract

The invention discloses an eye drop filling control device without a pollution source. The eye drop filling control device comprises a large tank, a first filter, a second filter and a filling machine which are connected in sequence by a conveying pipe, and further comprises a controller, an electronic balance and a buffering tank, wherein the buffering tank is arranged on the electronic balance and is connected between the second filter and the filling machine, a solenoid valve is arranged at the input port of the buffering tank, the electronic balance is electrically connected with the input end of the controller, and the solenoid valve is electrically connected with the output end of the controller; and the controller is internally provided with an eye drop stock upper limit value for enabling the controller to send out a signal to switch on the solenoid valve when the weighing value of the electronic balance is smaller than the value, and an eye drop stock upper limit value for enabling the controller to send out a signal to switch off the solenoid valve when the weighing value of the electronic balance is greater than the value. The electronic balance arranged at the bottom of the buffering tank is used for metering eye drops in the buffering tank, so that the pollution source generated by adding a metering device is avoided, and the eye drops are filled under a sterile environment.

Description

technical field [0001] The invention relates to the technical field of liquid filling, in particular to an eye drop filling control device without pollution source. Background technique [0002] In the later stage of eye drop production, after the liquid is formulated, it needs to go through two stages of sterile filtration before filling. However, from two-stage sterile filtration to filling, it needs to pass through a section of conveying pipe, resulting in a pressure difference between the sterile filter and the filling device, which directly causes the problem of unstable filling measurement of the filling machine due to the pressure difference. In order to solve this problem, a pressure elimination device for eliminating the pressure difference between the second-stage sterile filter and the filling machine is added between the second-stage sterile filter and the filling machine, but the drop in the device The stock of eye drops needs to be within a certain range, whic...

AI Technical Summary

Problems solved by technology

Currently, ultrasonic sensors are usually used to measure the volume of the solution. Specifically, the ultrasonic sensor is placed in the buffer tank to monitor the stock of eye drops in the buffer tank in real time. However, the eye drops need to be strictly sterilized, and the Putting the ultrasonic sensor into the buffer tank will undoubtedly introduce a pollution source, resulting in the pollution of eye drops. Therefore, it is necessary to further improve the above-mentioned equipment to solve the problem of the pollution source

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