CN215460873U - Be applied to anti-return device of transfer line - Google Patents
Be applied to anti-return device of transfer line Download PDFInfo
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- CN215460873U CN215460873U CN202121417932.8U CN202121417932U CN215460873U CN 215460873 U CN215460873 U CN 215460873U CN 202121417932 U CN202121417932 U CN 202121417932U CN 215460873 U CN215460873 U CN 215460873U
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Abstract
The utility model discloses an anti-backflow device applied to a transfusion tube, and particularly relates to the technical field of medical instruments, wherein the anti-backflow device comprises an upper liquid inlet tube, a hollow liquid storage cavity tube, a lower liquid outlet tube, a first side liquid outlet tube, a liquid stagnation cavity tube, a second side liquid outlet tube and an opening and closing valve for controlling liquid inlet and outlet of the lower liquid outlet tube; two ends of the liquid storage cavity pipe are respectively communicated with the upper liquid inlet pipe and the lower liquid outlet pipe; one end of the liquid outlet pipe at the first side is communicated with the liquid storage cavity pipe, the other end of the liquid outlet pipe at the first side is communicated with the liquid stagnation cavity pipe, one end of the liquid stagnation cavity pipe, which is back to the liquid outlet pipe at the first side, is communicated with the liquid outlet pipe at the second side, and one end of the liquid outlet pipe at the second side, which is back to the liquid stagnation cavity pipe, is communicated with the lower liquid outlet pipe; the opening and closing valve is arranged on the lower liquid outlet pipe, the connecting point of the second side liquid outlet pipe and the lower liquid outlet pipe is located below the opening and closing valve, and a water isolating piece is arranged at the connecting port of the liquid storage cavity pipe and the first side liquid outlet pipe. The backflow prevention device has the advantage that when the liquid medicine is infused completely, blood in the vein can be prevented from being sucked back into the pipeline.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a backflow prevention device applied to an infusion tube.
Background
The infusion apparatus is a common medical consumable, and a channel between a vein and liquid medicine is established through aseptic treatment for intravenous infusion. Generally comprises eight parts of a vein needle or an injection needle, a needle head protective cap, a transfusion hose, a liquid medicine filter, a flow rate regulator, a drip cup, a bottle stopper puncture outfit, an air filter and the like which are connected. In practical operation, the infusion bottle is hung on the infusion rod, the air is exhausted until the liquid medicine flows to the lower end of the infusion tube, the regulator is closed, the vein needle is punctured into the vein, after the fixing is completed, the tourniquet is unfastened, and the flow rate is adjusted.
However, when the conventional infusion apparatus is used, after the liquid medicine in the infusion bag and the Murphy dropper is dripped, if the infusion bag is not replaced in time or the needle is pulled out, the blood in the vein flows back to the infusion tube, and further the health of the patient is affected.
SUMMERY OF THE UTILITY MODEL
The utility model provides a backflow prevention device applied to a transfusion tube, which has the advantage that when the transfusion of liquid medicine is finished, the backflow prevention device can prevent blood in veins from being sucked back into a pipeline.
The utility model adopts the following technical scheme:
an anti-backflow device applied to an infusion tube comprises an upper liquid inlet tube, a hollow liquid storage cavity tube, a lower liquid outlet tube, a first side liquid outlet tube, a liquid stagnation cavity tube, a second side liquid outlet tube and an opening and closing valve for controlling liquid in and out of the lower liquid outlet tube; two ends of the liquid storage cavity pipe are respectively communicated with the upper liquid inlet pipe and the lower liquid outlet pipe; one end of the liquid outlet pipe at the first side is communicated with the liquid storage cavity pipe, the other end of the liquid outlet pipe at the first side is communicated with the liquid stagnation cavity pipe, one end of the liquid stagnation cavity pipe, which is back to the liquid outlet pipe at the first side, is communicated with the liquid outlet pipe at the second side, and one end of the liquid outlet pipe at the second side, which is back to the liquid stagnation cavity pipe, is communicated with the lower liquid outlet pipe; the opening and closing valve is arranged on the lower liquid outlet pipe, the connecting point of the second side liquid outlet pipe and the lower liquid outlet pipe is located below the opening and closing valve, and a water isolating piece is arranged at the connecting port of the liquid storage cavity pipe and the first side liquid outlet pipe.
Preferably, the opening and closing valve comprises a cylindrical plug, a fixed rod, a blocking convex part and a driving part for driving the cylindrical plug to slide, the cylindrical plug is arranged in the lower liquid outlet pipe in a sliding mode, a liquid through groove matched with the blocking convex part is formed in the middle of the cylindrical plug, one end of the fixed rod is fixed to the side wall of the lower liquid outlet pipe, and the other end of the fixed rod is fixed to the blocking convex part.
Preferably, the driving part comprises a shifting rod, a groove matched with the shifting rod and capable of sliding up and down is formed in the side end of the lower liquid outlet pipe, an embedded groove matched with the shifting rod and transversely embedded into the side end of the lower liquid outlet pipe is formed in the side end of the lower liquid outlet pipe, the embedded groove is communicated with the groove, and the shifting rod is fixed with the columnar plug.
Preferably, the open-close valve further comprises an elastic piece, and two ends of the elastic piece are respectively fixed with the fixing rod and the columnar plug.
Preferably, an accommodating groove is formed in the end side of the columnar plug, and a sealing ring is arranged in the accommodating groove.
Preferably, the three side peripheral parts of the water-proof sheet are fixed with the inner cavity wall of the liquid storage cavity pipe, and the opening side faces downwards.
In summary, due to the adoption of the method, the beneficial effects of the utility model are as follows:
by arranging the stagnant liquid cavity pipe, the utility model can lead the backflow blood to be contained in the stagnant liquid cavity pipe and not flow back into the infusion bag when the infusion bag is not replaced in time, thereby avoiding the injury to the patient. Meanwhile, when the patient realizes that the liquid medicine in the Murphy dropper is about to flow out, the opening and closing valve can be immediately closed, so that the backflow blood cannot enter the Murphy dropper and only can enter the stagnant liquid cavity pipe at most, and the liquid outlet of the stagnant liquid cavity pipe is provided with the water isolating sheet, so that the sealing effect can be realized.
Drawings
FIG. 1 is a schematic view of a backflow prevention device applied to an infusion tube;
FIG. 2 is a schematic sectional view of a backflow prevention device applied to an infusion tube;
fig. 3 is an enlarged view of a portion a in fig. 2.
In the figure: 1. the liquid storage device comprises an upper liquid inlet pipe, 2, a liquid storage cavity pipe, 21, a water separation sheet, 3, a lower liquid outlet pipe, 5, a first side liquid outlet pipe, 6, a second side liquid outlet pipe, 7, a liquid stagnation cavity pipe, 81, a columnar plug, 810, a liquid passing groove, 811, a deflector rod, 82, a fixing rod, 83, an elastic piece, 84 and a blocking convex part.
Detailed Description
The following examples may help one skilled in the art to better understand the present invention, but are not intended to limit the present invention in any way.
As shown in fig. 1 to 3, a backflow prevention device applied to an infusion tube is characterized by comprising an upper liquid inlet tube 1, a hollow liquid storage cavity tube 2, a lower liquid outlet tube 3, a first side liquid outlet tube 5, a liquid stagnation cavity tube 7, a second side liquid outlet tube 6 and a switch valve for controlling liquid inlet and outlet of the lower liquid outlet tube 3.
Two ends of the liquid storage cavity pipe 2 are respectively communicated with the upper liquid inlet pipe 1 and the lower liquid outlet pipe 3.
One end of the first side liquid outlet pipe 5 is communicated with the liquid storage cavity pipe 2, the other end of the first side liquid outlet pipe is communicated with the liquid stagnation cavity pipe 7, one end of the liquid stagnation cavity pipe 7, which is back to the first side liquid outlet pipe 5, is communicated with the second side liquid outlet pipe 6, and one end of the second side liquid outlet pipe 6, which is back to the liquid stagnation cavity pipe 7, is communicated with the lower liquid outlet pipe 3.
The on-off valve is arranged on the lower liquid outlet pipe 3, and the connection point of the second side liquid outlet pipe 6 and the lower liquid outlet pipe 3 is positioned below the on-off valve.
A water-isolating sheet 21 is arranged at the connecting port of the liquid storage cavity pipe 2 and the first side liquid outlet pipe 5.
As shown in fig. 3, the open/close valve includes a cylindrical plug 81, a fixing rod 82, a blocking protrusion 84 and a driving member for driving the cylindrical plug 81 to slide, the cylindrical plug 81 is slidably disposed in the lower liquid outlet pipe 3, a liquid passing groove 810 adapted to the blocking protrusion 84 is disposed in the middle of the cylindrical plug 81, one end of the fixing rod 82 is fixed to the side wall of the lower liquid outlet pipe 3, and the other end of the fixing rod is fixed to the blocking protrusion 84. The columnar plug 81 is driven by the driving member to slide in the lower liquid outlet pipe 3, and when the plug projection 84 is fitted into the liquid passage groove 810, the open/close valve is closed, and the liquid medicine cannot pass through the lower liquid outlet pipe 3. When the driving member drives the cylindrical plug 81 to slide away from the blocking protrusion 84, the liquid medicine can flow down along the gap between the fixing rod 82 and the blocking protrusion 84.
As shown in fig. 3, the driving member includes a driving lever 811, a groove adapted to the driving lever 811 and sliding up and down is disposed at a side end of the lower liquid outlet pipe 3, an embedding slot adapted to the driving lever 811 and transversely embedded into the groove is disposed at a side end of the lower liquid outlet pipe 3, the embedding slot and the groove are communicated, and the driving lever 811 and the columnar plug 81 are fixed together. When the lever 811 is fitted into the groove, that is, the blocking projection 84 is fitted into the liquid passage groove 810, the open/close valve is closed.
In this embodiment, the open/close valve further includes an elastic member 83, and both ends of the elastic member 83 are respectively fixed to the fixing rod 82 and the cylindrical plug 81. The elastic member 83 is provided to separate the cylindrical stopper 81 and the blocking protrusion 84, i.e., to open the open/close valve at the beginning.
In this embodiment, the end side of the columnar plug 81 is provided with a receiving groove, and a seal ring is disposed in the receiving groove. In the present embodiment, three side peripheral portions of the water-blocking sheet 21 are fixed to the inner cavity wall of the liquid storage cavity tube 2 with the open side facing downward. The water-proof sheet 21 acts like an opening and closing valve, i.e. after the opening and closing valve is closed, the liquid medicine can only pass through the gap between the water-proof sheet 21 and the inner cavity wall of the liquid storage cavity tube 2, so that the unidirectional flow of the liquid medicine is controlled, and simultaneously, blood is prevented from entering the liquid storage cavity tube 2 from the lower liquid outlet tube 3, even entering the infusion bag.
Claims (6)
1. The backflow prevention device applied to the infusion tube is characterized by comprising an upper liquid inlet tube (1), a hollow liquid storage cavity tube (2), a lower liquid outlet tube (3), a first side liquid outlet tube (5), a liquid stagnation cavity tube (7), a second side liquid outlet tube (6) and an opening and closing valve for controlling liquid inlet and outlet of the lower liquid outlet tube (3);
two ends of the liquid storage cavity pipe (2) are respectively communicated with the upper liquid inlet pipe (1) and the lower liquid outlet pipe (3);
one end of the first side liquid outlet pipe (5) is communicated with the liquid storage cavity pipe (2), the other end of the first side liquid outlet pipe is communicated with the liquid stagnation cavity pipe (7), one end, back to the first side liquid outlet pipe (5), of the liquid stagnation cavity pipe (7) is communicated with the second side liquid outlet pipe (6), and one end, back to the liquid stagnation cavity pipe (7), of the second side liquid outlet pipe (6) is communicated with the lower liquid outlet pipe (3);
the opening and closing valve is arranged on the lower liquid outlet pipe (3), and a connection point of the second side liquid outlet pipe (6) and the lower liquid outlet pipe (3) is positioned below the opening and closing valve;
a water-isolating sheet (21) is arranged at the connecting port of the liquid storage cavity pipe (2) and the first side liquid outlet pipe (5).
2. The backflow prevention device applied to the infusion tube as claimed in claim 1, wherein the opening and closing valve comprises a cylindrical plug (81), a fixing rod (82), a blocking convex part (84) and a driving part for driving the cylindrical plug (81) to slide, the cylindrical plug (81) is slidably arranged in the lower liquid outlet tube (3), a liquid passing groove (810) matched with the blocking convex part (84) is formed in the middle of the cylindrical plug (81), one end of the fixing rod (82) is fixed to the side wall of the lower liquid outlet tube (3), and the other end of the fixing rod is fixed to the blocking convex part (84).
3. The backflow prevention device applied to the infusion tube as claimed in claim 1, wherein the driving member comprises a driving lever (811), a groove adapted to the driving lever (811) to slide up and down is formed in the side end of the lower liquid outlet tube (3), an embedded groove adapted to the driving lever (811) to be transversely embedded is formed in the side end of the lower liquid outlet tube (3), the embedded groove and the groove are communicated, and the driving lever (811) and the columnar plug (81) are fixed to each other.
4. The backflow prevention device applied to the infusion tube as claimed in claim 2, wherein the opening and closing valve further comprises an elastic member (83), and two ends of the elastic member (83) are respectively fixed with the fixing rod (82) and the cylindrical plug (81).
5. The backflow prevention device applied to an infusion tube as set forth in claim 2, wherein a receiving groove is provided on an end side of the cylindrical stopper (81), and a seal ring is disposed in the receiving groove.
6. The backflow prevention device applied to the infusion tube as claimed in claim 2, wherein three side peripheries of the water-separation sheet (21) are fixed to an inner cavity wall of the liquid storage cavity tube (2), and an opening side faces downward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121417932.8U CN215460873U (en) | 2021-06-24 | 2021-06-24 | Be applied to anti-return device of transfer line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121417932.8U CN215460873U (en) | 2021-06-24 | 2021-06-24 | Be applied to anti-return device of transfer line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215460873U true CN215460873U (en) | 2022-01-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121417932.8U Active CN215460873U (en) | 2021-06-24 | 2021-06-24 | Be applied to anti-return device of transfer line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215460873U (en) |
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2021
- 2021-06-24 CN CN202121417932.8U patent/CN215460873U/en active Active
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