an infusion tube

Abstract

The invention discloses an infusion tube mouth which comprises a main tube, a movable sealing tube and a sealing outer tube. The main tube is sequentially and internally provided with a liquid inlet cavity, a sealing cavity and a limiting cavity. The diameter of the liquid inlet cavity and the diameter of the limiting cavity are both larger than the diameter of the sealing cavity. The top of the movable sealing tube is sealed, and a sealing part is arranged on the side, close to the top end, of the movable sealing tube. The diameter of the sealing part is matched with the diameter of the sealing cavity. The movable sealing tube is arranged in the main tube in a penetrating mode. A liquid inlet is formed in the side wall of the sealing part. The movable sealing tube makes the liquid inlet exposed or closed through movement. The sealing outer tube is attached to the bottom end face of the main tube so that the lower port of the main tube can be closed. By means of the infusion tube mouth, an infusion channel can be sealed when an infusion resin needle is pulled out, so the defect that liquid medicine leaks out of an infusion container or pollution is caused by butyl rubber plug cast produced by piercing is avoided, and product quality is improved.

Description

technical field [0001] The invention relates to an infusion tube port for an infusion bag. Background technique [0002] Flexible packaging infusion products have been on the market for many years, and its structure is mainly composed of a bag body made of non-PVC multi-layer co-extruded film, a mouth tube and a combined cover. There are various forms of mouth tubes and combined caps on the market. The mouth of the nozzle and the combined cap are relatively completely independent. First, connect the mouth tube to the bag body, heat it through a heating device, and then weld and seal it, or directly insert the connection part of the combined cap into the mouth tube and apply external pressure to seal; there are also combined caps and bags. The mouth tube is integrated, just weld the mouth tube to the bag body directly. The structure of the mouth tube and the combined cover is provided with a butyl rubber plug or a blocking valve plate for blocking and sealing. During its u...

AI Technical Summary

Problems solved by technology

[0006] In method 1: the purpose of the built-in butyl rubber plug is mainly to use the elastic characteristics of the butyl rubber plug after the puncture. After the infusion resin needle is drawn out, the butyl rubber plug can rebound to block the puncture hole to prevent leakage, but the actual During the use of rubber plugs, the rebound force is often insufficient, resulting in insufficient rebound, resulting in the puncture hole not being completely closed, resulting in leakage of the liquid medicine; in addition, the sharp resin needle will inevitably damage the butyl rubber plug during the puncture process, resulting in butyl rubber Stopper shedding, butyl rubber stopper shedding enters the medicine and affects the quality of the product

[0007] In the second way: after the valve plate is punctured by the infusion resin needle, the valve plate is inelastic and cannot return to block the needle hole

After the infusion is completed, the remaining medicinal solution in the infusion bag will flow out of the bag, causing pollution

Images