Anti-reflux and anti-clogging drainage device with large suction volume

Abstract

The invention relates to a backflow-prevention anti-blocking drainage device with a large suction amount. The drainage device comprises a liquid inlet valve body (1), a liquid inlet valve core (2), a liquid inlet valve spring (3), an upper valve cover and a lower valve cover (4 and 10), a needle cylinder piston (5), a piston rod (6), a liquid discharging valve body (7), a liquid discharging valve core (8) and a liquid discharging spring (9), wherein the liquid inlet valve core (2) only allowing a liquid to flow downwards is arranged in the liquid inlet valve body (1), and an insertion hole for a liquid inlet pipe (11) is formed in the upper left part of the liquid inlet valve body (1); the liquid discharging valve core (8) only allowing the liquid to flow leftwards is arranged in the liquid discharging valve body (7); and an insertion hole of a liquid discharging pipe (13) and a duct allowing the needle cylinder piston (5) to move leftwards and rightwards are formed in the left side and in the upper right part of the liquid discharging valve body (7) respectively. The needle cylinder piston (5) moves leftwards and rightwards continuously, so that the liquid can be drained and discharged to a container. The backflow-prevention anti-blocking drainage device with a large suction amount has the advantages as follows: smooth drainage is realized, the drainage amount is large, retrograde infection of the liquid is prevented, blocking is avoided, and continuous drainage can be realized.

Description

technical field

[0001] The invention relates to a medical device, in particular to a large suction volume anti-reflux and anti-blockage drainage device. Background technique

[0002] Gastroscopy is widely used in the examination of lesions in the upper gastrointestinal tract. Gastroscopy has unique effects in judging the degree of chronic gastritis and the presence or absence of intestinal metaplasia, differentiating benign and malignant ulcer lesions, determining the cause of upper gastrointestinal bleeding, and early detection of gastric cancer. In order to clearly see the mucosal surface and tissue conditions of the digestive tract, stomach and other parts, it is necessary to ensure that the inspected parts are clean and clean, and there is no food or blood clot left. However, for patients with chyme retention in the stomach caused by pyloric obstruction, it is difficult to completely discharge the residual food in the stomach, and it is necessary to manually use negativ...

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