External expansion type sealing detection device

Abstract

The invention provides an external expansion type sealing detection device, and belongs to the technical field of medical detection equipment. The inner core with one end extending out of the shell is arranged in the sliding cavity of the shell in a sliding mode, the two sealing rings abutting against the cavity wall of the sliding cavity are arranged on the inner core in a spaced mode, and the end, extending out of the shell, of the inner core is sleeved with the elastic piston ring with one end abutting against the shell and pressed through the pressing head. The inner core is provided with an air inflation hole communicated with the interval between the two sealing rings and a detection hole which extends out of the pressure head and is provided with a detection head, so that the elastic piston ring can be extruded to deform when the inner core moves, the opening of the to-be-detected part is sealed, air inflation is performed through the detection hole, and the pressure change is detected through the detection head, thereby judging whether the air tightness is good or not. One-time operation is achieved, use is convenient, the leakage problem caused by the fact that the inflation structure is drawn out after inflation and then the detection structure is inserted is effectively prevented, the detection accuracy and reliability are improved, and it is ensured that medical equipment using the part can safely run in the later period.

Description

technical field [0001] The invention relates to the technical field of medical detection equipment, in particular to an external expansion type sealing detection device. Background technique [0002] In medical equipment, especially the equipment with pipes and sealed chambers such as dialyzers, it is necessary to ensure its extremely high sealing requirements. Therefore, ensuring the sealing performance of sealing parts is the prerequisite for the safe operation of the medical equipment. [0003] Parts with sealed chambers in medical equipment generally have openings, and their sealing performance needs to be tested during production. The testing method is generally carried out by extrusion. However, if the medical device is formed by ultrasonic welding, This extrusion-propulsion detection method will also press and seal the leak points on the originally poorly welded products, resulting in the detection results that are considered qualified products, so that unqualified pr...

AI Technical Summary

Problems solved by technology

[0003] Parts with sealed chambers in medical equipment generally have openings, and their sealing performance needs to be tested during manufacturing. The testing method is generally carried out by extrusion. However, if the medical device is formed by ultrasonic welding, This extrusion detection method will also compress and seal the leaks on the products that were originally poorly welded, resulting in the detection results being considered as qualified products, so that unqualified products are artificially regarded as qualified products

Therefore, not all products are suitable for the detection method of extrusion push. For these parts that cannot be detected by extrusion push, it is necessary to inflate and seal the opening, and then pull out the inflatable structure and insert it into the detection structure for detection. Although the detection can be realized, there is a large risk of leakage during the above operation switching process, which leads to poor accuracy of subsequent detection and makes it difficult to guarantee product quality

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