CN-122005974-A - Drainage pipeline structure

CN122005974ACN 122005974 ACN122005974 ACN 122005974ACN-122005974-A

Abstract

The invention discloses a drainage pipeline structure which comprises a connecting part, a drainage hose and a service hose, wherein the patient side end of the connecting part is provided with a patient side interface, the pump side end of the connecting part is provided with a drainage interface and a service interface which are spaced from each other, a drainage channel which is communicated with the drainage interface and the patient interface and a service channel which is communicated with the service interface and the drainage channel are arranged in the connecting part, the drainage hose is connected to the drainage interface, the service hose is connected to the service interface, and a labyrinth runner which prevents liquid from entering the service hose from the drainage channel but does not influence gas from the service hose to enter the drainage channel is arranged in the service channel. The drainage pipeline structure has the advantages of small pressure loss and difficult damage when in use.

Inventors

SUN YU
QI WEIBO
ZHAO JUNJIE
NIU NIU
LU WEIFEN
FU FEI
LI GUORONG
KE JIAN
SHEN DONGTING

Assignees

浙江乐信医疗科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260327

Claims (8)

1. A drain line structure comprising; a connection member having a patient side end with a patient side interface, a pump side end with a drain interface and a service interface spaced apart from each other, a drain passage communicating the drain interface with the patient interface and a service passage communicating the service interface with the drain passage; A drain hose connected to the drain port; A service hose connected to the service interface; The labyrinth flow passage is characterized in that a labyrinth flow passage which prevents liquid from entering the service hose from the drainage passage but does not influence gas from entering the drainage passage from the service hose is arranged in the service passage.
2. The drain line structure according to claim 1, wherein an air outlet of the service passage communicating with the drain passage is located at an edge position of the drain passage and is directed toward the drain interface.
3. The drain line structure according to claim 1, wherein the pump side end of the connecting member has a pump side port, the pump side port having therein the drain port and the service port, the drain hose and the service hose being a two-channel tube of unitary construction, the two-channel tube being inserted into the pump side port.
4. A drain line structure according to claim 3, wherein a first baffle is provided in the pump-side port, a hole serving as the drain port and a protruding cannula serving as the service port are provided on the first baffle, an end face of an insertion end of the two-channel tube is stopped by the first baffle, a mouth of the drain hose is abutted to the hole, and a mouth of the service hose is sleeved on the protruding cannula.
5. The drain line structure according to claim 4, wherein the connection member is constituted by an outer tube having the pump-side port and an inner tube having an insertion portion inserted into the outer tube and an exposure portion located outside the outer tube, the exposure portion having the patient-side port, and the insertion portion is provided with a labyrinth groove structure on a circumference thereof and cooperates with a tube inner wall of the outer tube to form the labyrinth flow passage.
6. The drainage pipeline structure according to claim 5, wherein the labyrinth groove structure comprises a first long groove and a second long groove which extend along the axial direction of the insertion part and are opposite in position, a first labyrinth groove and a second labyrinth groove which are distributed between the first long groove and the second long groove and are opposite in position, a head end inlet of the first long groove is communicated with the protruding cannula, one end of the first labyrinth groove is communicated with a tail end outlet of the first long groove, the other end of the first labyrinth groove is communicated with a head end inlet of the second long groove, one end of the second labyrinth groove is communicated with a tail end outlet of the second long groove, and the other end of the second labyrinth groove is communicated with the air outlet.
7. The drainage pipeline structure according to claim 6, wherein a second baffle plate positioned inside the hole and a partition plate connecting the first baffle plate and the second baffle plate are further arranged in the outer connecting pipe so as to divide the hole and an air cavity positioned inside the protruding cannula, the end face of the insertion part is abutted against the inner surface of the second baffle plate, and the protruding cannula is communicated with the head end inlet of the first long groove through the air cavity.
8. The drainage pipeline structure according to claim 7, wherein two positioning plugs are symmetrically arranged on the end face of the insertion end of the insertion portion, wherein the air outlet is formed in one positioning plug, positioning holes are formed in the second baffle plate and symmetrically located on two sides of the hole, an inward protruding annular flange is arranged at the inner opening of the hole, the annular flange is inserted into the drainage channel of the insertion portion, and the two positioning plugs are respectively inserted into the two positioning holes.

Description

Drainage pipeline structure Technical Field The invention belongs to the technical field of medical instruments, relates to a drainage device capable of sucking and leading in-vivo liquid out in a negative pressure mode, and particularly relates to a drainage pipeline structure of the drainage device. Background The in-vivo liquid drainage device is a medical device commonly used in clinical surgery. Thoracic surgery, respiratory medicine and oncology patients have hydrothorax, peritoneal effusion or pneumothorax, which needs to pass through the drainage tube outside the body through the incision in the operation area or body cavity of the human body, and the pus, exudation blood, tissue fluid and other liquids accumulated in the human tissue or body cavity are guided to the outside by utilizing a negative pressure suction mode, so that postoperative infection caused by liquid accumulation is prevented, and wound healing and rehabilitation are promoted. The in-vivo liquid drainage device generally comprises a drainage pump, a liquid collection container and a drainage pipeline, and the liquid in the human body is sucked into the liquid collection container through the drainage pipeline by generating negative pressure through the drainage pump. To enable the aspiration of liquid in the human body into the liquid collection container and to enable the flushing of the line at regular intervals to prevent clogging, the drain line typically comprises a drain hose, a service hose and a connecting part connecting the drain hose and the service hose together. The connecting member has a patient-side interface at one end and a drain interface and a service interface at the other end spaced apart from each other, and has a drain passage therein communicating with the patient-side interface and the drain interface, and a service passage communicating with the drain passage and the service interface. In order to enable a flow of liquid from the patient-side connection via the drainage channel to the drainage hose without the liquid flowing via the drainage channel, the service channel to the service hose during drainage of the liquid, and also to enable a smooth entry of cleaning gas in the service hose into the drainage channel and to the drainage hose during a line cleaning, a filter or a non-return valve is usually provided at the outlet point of the service channel connected to the drainage channel. The filter or the check valve can prevent the liquid in the drainage channel from entering the service channel, but can enable the gas in the service channel to smoothly enter the drainage channel. However, the filter is adopted, and the filter is required to ensure that the gas can pass but the liquid cannot pass, so that the gap on the membrane is made to be extremely tiny, the pressure loss problem is caused when the gas passes, and the flushing effect of the gas on the drainage hose is reduced. In addition, the diaphragm is impacted by high-pressure gas, is easy to damage and has shorter service life. When the check valve is adopted, a certain opening force is required to the valve of the check valve during gas flushing, and the problem of pressure loss is also caused, so that the flushing effect of gas on the drain hose is reduced. Disclosure of Invention Therefore, the technical problem to be solved by the invention is to provide a drainage pipeline structure with small pressure loss and no damage, so as to overcome the defects in the prior art. In order to solve the technical problems, the invention adopts the following technical scheme: A drain line structure comprising; a connection member having a patient side end with a patient side interface, a pump side end with a drain interface and a service interface spaced apart from each other, a drain passage communicating the drain interface with the patient interface and a service passage communicating the service interface with the drain passage; A drain hose connected to the drain port; A service hose connected to the service interface; The labyrinth flow passage is characterized in that a labyrinth flow passage which prevents liquid from entering the service hose from the drainage passage but does not influence gas from entering the drainage passage from the service hose is arranged in the service passage. The service channel is arranged as the labyrinth flow channel, so that liquid can be prevented from entering the service hose from the drain channel, but gas can not be influenced from entering the drain channel from the service hose, the labyrinth flow channel has the advantage of small pressure loss when gas flushing is performed, and the labyrinth flow channel has the advantage of being difficult to damage due to high strength. In a further development of the invention, the outlet opening of the service channel, which communicates with the drainage channel, is located at the edge of the drainage channel and faces the drainage interface. The arrangement posit