CN213158950U - Disposable positive pressure needleless connector - Google Patents
Disposable positive pressure needleless connector Download PDFInfo
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- CN213158950U CN213158950U CN202021035878.6U CN202021035878U CN213158950U CN 213158950 U CN213158950 U CN 213158950U CN 202021035878 U CN202021035878 U CN 202021035878U CN 213158950 U CN213158950 U CN 213158950U
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Abstract
The utility model relates to a disposable positive pressure needleless connector, which comprises an inner hollow upper cover body, a valve core which is arranged inside the upper cover body and has elasticity, and a lower cover body which is connected with the lower end of the upper cover body in a sealing way, when in use, the connector is connected between an external pipeline and a retaining needle, external force is applied on a pressure-bearing section of the valve core in the connection process, then the external force is transmitted to the deformation section to force the deformation section of the valve core to generate inward-folding deformation, the volume change cavity of the valve core is reduced, thereby the pressure-bearing section of the valve core moves inwards, further the sealing head and the sealing edge are separated, the sealing shoulder and the sealing surface are separated, the liquid medicine is circulated in the connector, the effect of the connector is achieved, after the transfusion is finished, the external pipeline is withdrawn, the external force disappears, the valve core recovers the original shape under the effect of the self elastic force, the sealing head and the, the infusion cavity is reduced, so that positive pressure is formed, and blood backflow is prevented.
Description
Technical Field
The utility model relates to the technical field of medical equipment, in particular to a disposable positive pressure needleless connector.
Background
The vein indwelling needle is used as a replacement product of a scalp steel needle, is widely applied to clinic, and has the advantages that the vein indwelling needle is more and more recognized by nursing staff; the venous indwelling needle has the advantages that: firstly, the vein retention has small puncture wound aiming at the blood vessel, effectively protects the blood vessel, can be repeatedly used after being temporarily repaired after being pulled out, and reduces the damage to the blood vessel; secondly, the venous indwelling needle reduces the number of times of puncture of the blood vessel of the patient, relieves the pain of the patient and lightens the workload of nurses; thirdly, the trocar has longer retention time in the blood vessel, and can carry out venous transfusion at any time for patients in operation, newborn, critical, rescue and the like, thereby ensuring treatment in time; fourthly, the economic price of the trocar is basically equal to that of the common scalp steel needle transfusion consumable, and the trocar is more economical and practical; current indwelling needles include an indwelling needle portion, a catheter and a connector having one or more channels. One end of the catheter is connected with the indwelling needle head part, the other end of the catheter is communicated with the connecting piece, and a port of the connecting piece is generally provided with a heparin cap for sealing; however, the indwelling needle needs to wash and seal the tube repeatedly, so that the nursing workload is increased, and the incidence rate of phlebitis is increased; in addition, in actual operation, when the infusion apparatus or the syringe is withdrawn from the indwelling needle, negative pressure is generated to return blood and form thrombus, and to prevent the generation of blood return, liquid must be fed while withdrawing the needle, which requires a high level of expertise and experience of the operator.
Disclosure of Invention
In order to solve the problems, the utility model provides a disposable positive pressure needleless connector.
The specific contents are as follows: disposable malleation needleless connector including interior upper cover body, set up in upper cover body inside and have elastic case, sealing connection at the lower lid of upper cover body lower extreme, characterized by:
the upper cover body is a hollow shell which is communicated up and down, an internal cavity of the upper cover body comprises an upper section of sealing cavity and a lower section of circulating cavity, and the sealing cavity and the circulating cavity are in smooth transition through a circular arc-shaped sealing surface which gradually expands downwards; the upper cover body and the lower cover body are transparent bodies.
The valve core comprises an upper pressure-bearing section and a lower deformation section, the pressure-bearing section and the deformation section are in smooth transition through an arc-shaped sealing shoulder which gradually enlarges downwards, a blind hole-shaped volume change cavity with a downward opening is arranged inside the valve core deformation section, the valve core is plugged inside the upper cover body, the lower port of the upper cover body is sealed through the lower cover body, the upper end part of the lower cover body is positioned in the circulation cavity of the upper cover body, the lower port of the volume change cavity of the valve core is hermetically connected with the upper end part of the lower cover body, the volume change cavity of the valve core is communicated with an air vent arranged on the lower cover body, the air vent is vertically arranged and communicated with the outside, the pressure-bearing section of the valve core is arranged in the sealing cavity of the upper cover body, a transfusion gap is arranged between the pressure-bearing section and the inner wall of the sealing cavity, the deformation section of the valve core is arranged in the circulation cavity of the upper cover body, a gap is arranged between the deformation section of the valve core and the inner wall of the circulation cavity of the upper cover body to serve as a transfusion cavity, the lower portion of the transfusion cavity is communicated with a transfusion hole formed in the lower cover body, and the transfusion hole comprises a horizontal hole communicated with the transfusion cavity and a vertical hole communicated with the outside.
Preferably, two decompression grooves which are vertically arranged and staggered from left to right are arranged on the inner wall of the volume change cavity on the valve core.
Preferably, the pressure-bearing section of the valve core comprises an upper sealing head and a middle waist-contracting body.
Preferably, the upper edge of the sealing cavity of the upper cover body is provided with a circle of sealing edge which protrudes inwards uniformly, and the sealing head on the valve core pressure-bearing section is correspondingly pressed on the sealing edge to form a circle of sealing partition.
Preferably, the inner wall of the circulation cavity of the upper cover body is provided with a plurality of liquid guide grooves distributed along the circumference, and the liquid guide grooves are vertically arranged and communicated with the infusion cavity.
Preferably, the lower cover body and the upper cover body are welded into an integral structure through ultrasonic welding.
Preferably, the lower end part of the lower cover body is positioned outside the upper cover body and is provided with a cylindrical connecting body, the center of the connecting body is provided with a transfusion tube coaxial with the connecting body, and the inside of the transfusion tube is a vertical hole of the transfusion hole.
Preferably, the inner wall of the connecting body is provided with an internal thread.
Preferably, the lower port of the air hole is arranged between the connector and the infusion tube.
Preferably, the upper end part of the upper cover body is provided with an external thread.
The utility model has the advantages of:
the utility model relates to a disposable positive pressure needleless connector, when in use, the connector of the utility model is connected between an external pipeline and a remaining needle connecting pipe, external force is applied on a bearing section of a valve core in the connection process, then force is transmitted to a deformation section to force the deformation section of the valve core to generate inward-folding deformation, thereby reducing a volume change cavity of the valve core, a pressure reduction groove is arranged, the reduction of the volume change cavity is realized mainly through deformation and distortion of the deformation section, but not caused by compression of a valve core material, the volume change quantity of the volume change cavity is ensured to be larger, the positive pressure in the pipe is more obvious after external force is removed, the bearing section of the valve core moves inwards, thereby separating a sealing head and a sealing edge, separating a sealing shoulder and a sealing surface, realizing the circulation of liquid medicine in the connector, achieving the effect of the connector, and a double-sealing partition is arranged between the valve core and an upper cover body, the sealing effect of the valve core is ensured, the sealing effect of the utility model is better, after the transfusion is finished, the external pipeline is evacuated, the external force disappears, the valve core recovers the original shape under the action of the self elastic force, the sealing head and the sealing edge are tightly attached, the sealing shoulder and the sealing surface are tightly attached to realize the double partition sealing, simultaneously, the volume change cavity of the valve core can be enlarged in the recovery process, the transfusion cavity is extruded to reduce the transfusion cavity, so that the liquid medicine in the transfusion cavity flows into the blood vessel to form positive pressure, and the blood is prevented from flowing back into the indwelling needle after the external force is evacuated; meanwhile, the inner wall of the infusion cavity is provided with a liquid guide groove, so that the flow and the infusion fluency in the infusion process are ensured.
Drawings
FIG. 1 is a front cross-sectional view of a disposable positive pressure needleless connector;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a front sectional view of the upper cover;
FIG. 4 is a front sectional view of the valve cartridge;
in the figure: 11. the infusion set comprises an upper cover body, 12 parts of a liquid guide groove, 13 parts of a circulation cavity, 14 parts of a sealing cavity, 15 parts of external threads, 16 parts of a sealing surface, 17 parts of a sealing edge, 21 parts of a valve core, 22 parts of a sealing head, 23 parts of a waist contracting body, 24 parts of a sealing shoulder, 25 parts of a volume change cavity, 26 parts of a pressure reducing groove, 27 parts of a deformation section, 31 parts of a lower cover body, 32 parts of a horizontal hole of an infusion hole, 33 parts of a vertical hole of the infusion hole, 34 parts of internal threads, 35 parts of an infusion tube, 36 parts of air holes, 37 parts of a connecting body, 41 parts of an infusion gap and 51.
Detailed Description
In the first embodiment, referring to fig. 1-4, the disposable positive pressure needleless connector comprises an upper hollow cover body, an elastic valve core arranged inside the upper cover body, and a lower cover body hermetically connected to the lower end of the upper cover body;
the upper cover body is a hollow shell which is communicated up and down, the inner cavity of the upper cover body comprises a sealing cavity at the upper section and a circulation cavity at the lower section, the sealing cavity and the circulation cavity are in smooth transition through an arc-shaped sealing surface which gradually expands downwards, the upper end part of the upper cover body is provided with an external thread, the quick installation and connection are convenient, the upper cover body and the lower cover body are transparent bodies, the inner condition of a joint can be seen, and medical personnel can conveniently perform corresponding operation according to the inner condition.
The valve core comprises an upper pressure-bearing section and a lower deformation section, the pressure-bearing section and the deformation section are in smooth transition through an arc-shaped sealing shoulder which gradually enlarges downwards, a blind hole-shaped volume change cavity with a downward opening is arranged inside the valve core deformation section, the valve core is plugged inside the upper cover body, the lower port of the upper cover body is sealed through the lower cover body, the lower cover body and the upper cover body are fused into a whole through ultrasonic fusion welding, the upper end part of the lower cover body is positioned in the circulation cavity of the upper cover body, the lower port of the volume change cavity of the valve core is hermetically connected with the upper end part of the lower cover body, the volume change cavity of the valve core is communicated with an air vent arranged on the lower cover body, the air vent is vertically arranged and communicated with the outside, the pressure-bearing section of the valve core is arranged in the sealing cavity of the upper cover body, a transfusion gap is arranged between the pressure-bearing section and the inner wall of the, the sealing shoulder of the valve core is correspondingly pressed on the sealing surface inside the upper cover body in a jacking mode and forms a circle of sealing partition, a gap is arranged between the deformation section of the valve core and the inner wall of the circulation cavity of the upper cover body to serve as a transfusion cavity, the lower portion of the transfusion cavity is communicated with a transfusion hole formed in the lower cover body, and the transfusion hole comprises a horizontal hole communicated with the transfusion cavity and a vertical hole communicated with the outside.
Two pressure reducing grooves which are vertically arranged and staggered from left to right are arranged on the inner wall of the volume change cavity on the valve core.
The pressure-bearing section of the valve core comprises a sealing head at the upper part and a waist-contracting body at the middle part, the upper edge of a sealing cavity of the upper cover body is provided with a circle of sealing edge which protrudes inwards uniformly, the sealing head on the pressure-bearing section of the valve core correspondingly pushes against the sealing edge and forms a circle of sealing partition, double sealing between the valve core and the upper cover body is realized, and the sealing effect and the use stability are ensured.
The inner wall of the circulation cavity of the upper cover body is provided with a plurality of liquid guide grooves distributed along the circumference, the liquid guide grooves are vertically arranged and communicated with the infusion cavity, and the flow size and the infusion fluency in the infusion process are guaranteed.
The lower tip of lower lid be located the outside of last lid and be equipped with the connector of tube-shape, be equipped with the internal thread on the inner wall of connector, the center of connector is equipped with the transfer line rather than the coaxial axle center, the inside of transfer line is the vertical hole in above-mentioned infusion hole, the lower port setting of bleeder vent is between connector and transfer line.
The utility model discloses a use and principle:
the utility model relates to a disposable positive pressure needleless connector, when using, the connector of the utility model is connected between an external pipeline and a connection pipe of a remaining needle, external force is applied on a bearing section of a valve core in the connection process, then force is transmitted to a deformation section to force the deformation section of the valve core to generate inward-folding deformation, thereby reducing a volume change cavity of the valve core, a pressure reduction groove is arranged, the reduction of the volume change cavity is realized mainly through deformation and distortion of the deformation section, but not caused by compression of valve core material, the volume change quantity of the volume change cavity is ensured to be larger, the positive pressure in the pipe is more obvious after external force is removed, the bearing section of the valve core moves inwards, thereby separating a sealing head and a sealing edge, separating a sealing shoulder and a sealing surface, liquid medicine enters an infusion cavity and a liquid guide groove through an infusion gap, and then enters the connection pipe of the remaining needle through an infusion hole, finally get into in the blood, the inner wall in transfusion cavity is equipped with the liquid guide groove, guarantee the flow size of infusion in-process and the smoothness nature of infusion, be equipped with the double seal between case and the last lid simultaneously and cut off, guarantee the sealed effect of case, make the utility model discloses a sealed effect is better, and stability is better, accomplishes the back when the infusion, and outside pipeline withdraws, and external force disappears, and the case resumes former shape under the effect of self elasticity, makes sealed head and sealed edge hug closely, sealed shoulder and sealed face hug closely and realize that the double partition is sealed, and the volume change chamber of case can enlarge gradually at the process of recovering simultaneously, and extrusion transfusion cavity makes the transfusion cavity diminish to make the liquid medicine in the transfusion cavity flow and then form the malleation to the blood backflow to keeping somewhere in the needle after preventing external force from withdrawing.
Claims (10)
1. Disposable malleation needleless connector including interior upper cover body, set up in upper cover body inside and have elastic case, sealing connection at the lower lid of upper cover body lower extreme, characterized by:
the upper cover body is a hollow shell which is communicated up and down, an internal cavity of the upper cover body comprises an upper section of sealing cavity and a lower section of circulating cavity, and the sealing cavity and the circulating cavity are in smooth transition through a circular arc-shaped sealing surface which gradually expands downwards; the upper cover body and the lower cover body are transparent,
the valve core comprises an upper pressure-bearing section and a lower deformation section, the pressure-bearing section and the deformation section are in smooth transition through an arc-shaped sealing shoulder which gradually enlarges downwards, a blind hole-shaped volume change cavity with a downward opening is arranged inside the valve core deformation section, the valve core is plugged inside the upper cover body, the lower port of the upper cover body is sealed through the lower cover body, the upper end part of the lower cover body is positioned in the circulation cavity of the upper cover body, the lower port of the volume change cavity of the valve core is hermetically connected with the upper end part of the lower cover body, the volume change cavity of the valve core is communicated with an air vent arranged on the lower cover body, the air vent is vertically arranged and communicated with the outside, the pressure-bearing section of the valve core is arranged in the sealing cavity of the upper cover body, a transfusion gap is arranged between the pressure-bearing section and the inner wall of the sealing cavity, the deformation section of the valve core is arranged in the circulation cavity of the upper cover body, a gap is arranged between the deformation section of the valve core and the inner wall of the circulation cavity of the upper cover body to serve as a transfusion cavity, the lower portion of the transfusion cavity is communicated with a transfusion hole formed in the lower cover body, and the transfusion hole comprises a horizontal hole communicated with the transfusion cavity and a vertical hole communicated with the outside.
2. The single use positive pressure needleless connector of claim 1, wherein: two pressure reducing grooves which are vertically arranged and staggered from left to right are arranged on the inner wall of the volume change cavity on the valve core.
3. The single use positive pressure needleless connector of claim 1, wherein: the pressure-bearing section of the valve core comprises a sealing head at the upper part and a waist-contracting body at the middle part.
4. The single use positive pressure needleless connector of claim 3 wherein: the upper edge of the sealing cavity of the upper cover body is provided with a circle of sealing edge which uniformly protrudes inwards, and the sealing head on the valve core pressure-bearing section correspondingly pushes against the sealing edge and forms a circle of sealing partition.
5. The single use positive pressure needleless connector of claim 1, wherein: the inner wall of the circulation cavity of the upper cover body is provided with a plurality of liquid guide grooves distributed along the circumference, and the liquid guide grooves are vertically arranged and communicated with the infusion cavity.
6. The single use positive pressure needleless connector of claim 1, wherein: the lower cover body and the upper cover body are integrated into a whole through ultrasonic welding.
7. The single use positive pressure needleless connector of claim 1, wherein: the lower end part of the lower cover body is positioned outside the upper cover body and is provided with a cylindrical connector, the center of the connector is provided with a transfusion tube which is coaxial with the connector, and the inside of the transfusion tube is a vertical hole of the transfusion hole.
8. The single use positive pressure needleless connector of claim 7 wherein: the inner wall of the connecting body is provided with an internal thread.
9. The single use positive pressure needleless connector of claim 7 wherein: the lower port of the air hole is arranged between the connector and the infusion tube.
10. The single use positive pressure needleless connector of claim 1, wherein: the upper end of the upper cover body is provided with an external thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021035878.6U CN213158950U (en) | 2020-06-08 | 2020-06-08 | Disposable positive pressure needleless connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021035878.6U CN213158950U (en) | 2020-06-08 | 2020-06-08 | Disposable positive pressure needleless connector |
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| Publication Number | Publication Date |
|---|---|
| CN213158950U true CN213158950U (en) | 2021-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021035878.6U Active CN213158950U (en) | 2020-06-08 | 2020-06-08 | Disposable positive pressure needleless connector |
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| Country | Link |
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| CN (1) | CN213158950U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114748785A (en) * | 2022-04-01 | 2022-07-15 | 山东新华安得医疗用品有限公司 | Device for preventing catheter blood return |
-
2020
- 2020-06-08 CN CN202021035878.6U patent/CN213158950U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114748785A (en) * | 2022-04-01 | 2022-07-15 | 山东新华安得医疗用品有限公司 | Device for preventing catheter blood return |
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