Leakage detection device on blood path tube production line

Abstract

The invention relates to the technical field of blood path tubes, and discloses a leakage detection device on a blood path tube production line. The leakage detection device comprises a first sensor,a second sensor, an air supply mechanism, a first platform, a second platform and a first driving mechanism, wherein the first sensor is used for collecting a first air pressure value in a first bloodpath tube, the second sensor is used for collecting a second air pressure value in a second blood path tube, the air supply mechanism is used for supplying air to the first blood path tube and the second blood path tube, the first platform is provided with a first sliding rail, the second platform is arranged on the first sliding rail in a sliding mode, and the first driving mechanism is used fordriving the second platform to be switched between an air supply position and a disconnection position in a sliding mode; and when the second platform is driven to the air supply position by the first driving mechanism, the air supply mechanism is connected with the first blood path tube through a first sleeve, and the air supply mechanism is connected with the second blood path tube through a second sleeve. According to the leakage detection device, the air pressure reduction amount of the two blood path tubes can be detected at the same time, the influence of the temperature on the leakagedetection result can be effectively eliminated, and the leakage detection accuracy of the blood path tubes is improved.

Description

technical field [0001] The invention relates to the technical field of blood tubes, in particular to a leak detection device on a blood tube production line. Background technique [0002] A blood line tube, also known as a hemodialysis line, is used for hemodialysis treatment, and generally includes a line and joints on both sides of the line. [0003] When producing on the production line, it is necessary to set up a leak detection station for leak detection of the blood line tubes to ensure that the air tightness of the produced blood line tubes meets the requirements. In the leak detection station, multiple blood tubes are regularly arranged on the conveyor belt, and the conveyor belt moves along the flow direction of the production line. [0004] In the prior art, when testing the airtightness of leaking blood tubes, the blood tubes to be tested are generally tested individually one by one. The specific method is: fill the blood tubes to be tested with gas and seal them...

AI Technical Summary

Problems solved by technology

[0005] However, there is a leak detection error of about 10% in the existing method, that is, 10% of the blood tubes that are judged to be unqualified are actually qualified products

This is because the blood line tube is made of soft material, and its actual volume is expanded by inflation when it is inflated, resulting in a decrease in the gas pressure in the blood line tube and an additional pressure drop, resulting in inaccurate measurement

[0006] In the prior art, when a constant pressure drop threshold is used to test blood tubes produced at different temperatures, errors will inevitably occur due to differences in the expansion coefficients of the blood tubes

At the same time, because the expansion coefficient of the blood tube is greatly affected by the ambient temperature, it is difficult to define the pressure drop threshold at each temperature, which makes it difficult to eliminate this error

Images