Microinfusion pump

Abstract

The invention discloses a microinfusion pump, which comprises a pump head, a liquid storage bag, a silica gel bag, an infusion conduit and a pressure control valve, wherein one end of the silica gel bag is communicated with the liquid storage bag, and the other end of the silica gel bag is communicated with the infusion conduit; a driving piece which can extrude the silica gel bag regularly, so that air pressure in the silica gel bag is changed is arranged on the pump head; the silica gel bag is communicated with the infusion conduit by the pressure control valve which is resistant to back flow and direct flow; the pressure control valve comprises an inner joint, an outer joint and a valve plate; a water inlet channel is formed on the inner joint and is communicated with the silica gel bag; a water outlet channel is formed on the outer joint and is communicated with the infusion conduit; the inner joint is hermetically connected with the outer joint, and an accommodating space which is used for communicating the water inlet channel and the water outlet channel is formed between the inner joint and the outer joint; the valve plate is made of an elastic material, and a water outlet hole is formed in the valve plate; and the valve plate is positioned in the accommodating space, so that the water inlet channel is separated from the water outlet channel. According to the microinfusion pump, the valve plate has a self-sealing capacity, so that situations of uncontrolled infusion and backflow of blood can be prevented under the pressure action of the pump head.

Description

technical field [0001] The invention relates to the technical field of microperistaltic pumps in medical instruments, in particular to a microinfusion pump that is not affected by gravity and can prevent blood return. Background technique [0002] Most of the medical micro-infusion peristaltic pumps used in the prior art are composed of an infusion control device (pump head for short) and an infusion bag. The pump head controls the infusion by controlling the outlet pipeline connected to the infusion bag. The working principle is: When the pump head is combined with the infusion bag, the left valve plate and the right valve plate on the pump head will press on the silicon capsule of the infusion bag, so that the liquid in the liquid storage bag is connected to the outlet end; The left valve plate, the right valve plate and the main push plate move regularly to generate pressure in the silicon capsule to achieve the purpose of infusion. However, when the pump head is connect...

AI Technical Summary

Problems solved by technology

However, when the pump head is connected to the infusion bag during use, the clamping is often not in place, or it falls off halfway, which leads to the fact that the valve plate of the pump head cannot effectively prevent the water flow in the infusion bag. When the pressure is on or below the human body, the infusion will be out of control or the blood will return, resulting in danger

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