CN209790516U - Balanced pressure needleless infusion joint - Google Patents
Balanced pressure needleless infusion joint Download PDFInfo
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- CN209790516U CN209790516U CN201822269109.1U CN201822269109U CN209790516U CN 209790516 U CN209790516 U CN 209790516U CN 201822269109 U CN201822269109 U CN 201822269109U CN 209790516 U CN209790516 U CN 209790516U
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Abstract
The utility model discloses a balanced pressure needleless infusion joint, which comprises an upper cover and a lower cover, wherein the cylinder cavities of the upper cover and the lower cover are communicated to form an element cavity, and a valve body is fixedly connected in the element cavity; the lower section of the valve body is sleeved with a lower rubber valve which is fixedly connected with the element cavity, the lower rubber valve is arranged on an opening below the valve cavity, the lower end of the valve cavity is spherical, a liquid outlet notch is arranged at the lower end of the valve cavity, the valve cavity is communicated with the cylinder cavity of the lower cover through the liquid outlet notch, and the upper side and the lower side of the liquid outlet notch are both provided with a capacity change space. Because of the arrangement of the glue feeding valve and the glue discharging valve, double sealing can be realized, after infusion is completed, when the head of the infusion tube is drawn outwards, the pressure of blood on the liquid outlet notch can make the liquid outlet notch sealed, so that backflow is prevented, and after the head of the infusion tube is drawn out, the insertion notch is sealed, so that the pressure of a valve cavity between the insertion notch and the liquid outlet notch is balanced, and the backflow phenomenon of blood is greatly reduced. The utility model is used for medical equipment.
Description
Technical Field
The utility model relates to the field of medical equipment, in particular to a balanced pressure needleless infusion joint.
background
The needleless infusion connector is widely applied to infusion treatment of various clinical departments, but most needleless infusion connectors in the domestic market are negative pressure connectors, and blood return can happen when infusion is completed. Once blood returns, the patient is frightened, worry and unease are caused, and the infusion hose cannot continue infusion due to air bubble embolism if the blood returns.
Aiming at the problems of negative pressure connectors, a zero pressure connector is provided by a plurality of enterprises, but actually the zero pressure connector is not true, and the technical means is to arrange a one-way valve, but the one-way valve is easy to leak, and a little blood backflow phenomenon still exists in clinical use.
In addition, after the one-way valve is arranged, the pump cannot be pumped back, and the clinical use cannot be met.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: provides a balanced pressure needleless infusion joint.
The utility model provides a solution of its technical problem is:
A balanced pressure needleless infusion joint comprises an upper cover and a lower cover which are respectively in a cylindrical barrel cavity and are communicated up and down, wherein the lower section of the upper cover is sleeved with the upper section of the lower cover, the barrel cavities of the upper cover and the lower cover are communicated to form an element cavity, a valve body is fixedly connected in the element cavity, a valve cavity with a downward opening is arranged in the valve body, a liquid through hole communicated with the valve cavity is arranged on the valve body, an elastic sizing valve is sleeved on the upper section of the valve body, the lower end of the sizing valve is fixedly connected with the upper cover, a normally closed insertion notch is arranged on the upper end face of the sizing valve, the liquid through hole is arranged in the valve cavity, a liquid inlet cavity is arranged on the sizing valve, the liquid inlet cavity is arranged below the insertion notch, and the liquid inlet cavity is communicated;
The lower segment of the valve body is sleeved with a lower glue valve, the lower glue valve is fixedly connected with the element cavity, the lower glue valve is arranged on an opening below the valve cavity, the lower end of the valve cavity is spherical, a cross-shaped liquid outlet notch is formed in the lower end of the valve cavity, the valve cavity is communicated with the cylinder cavity of the lower cover through the liquid outlet notch, the upper glue valve and the lower glue valve are both connected with the outer wall of the valve body in a sealing mode, and a containing and changing space is arranged on the upper side and the lower side of the liquid outlet.
As a further improvement of the scheme, the middle section of the gluing valve is integrally conical, the middle section of the gluing valve comprises reinforcing rings which are sequentially arranged from top to bottom at intervals, and two adjacent reinforcing rings are connected by a thin-wall elastic lantern ring.
As a further improvement of the scheme, the outer wall of the valve body is provided with a positioning ring, and the lower end face of the gluing valve is abutted to the upper end face of the positioning ring.
As a further improvement of the scheme, a downward conical abutting surface is arranged on the wall of the cylinder cavity of the upper cover, a upward pre-pressing conical ring is arranged on the glue feeding valve, the conical surface of the pre-pressing conical ring abuts against the conical surface of the abutting conical surface, and the lower end face of the glue feeding valve is connected with the upper end face of the positioning ring in a sealing mode.
As a further improvement of the scheme, the peripheral surface of the lower section of the gluing valve is in interference sealing connection with the cavity wall of the element cavity.
As a further improvement of the scheme, the outer wall of the valve body is provided with a positioning ring, and the upper end face of the lower rubber valve is abutted against the lower end face of the positioning ring.
As a further improvement of the scheme, the upper end face of the lower rubber valve is in sealing connection with the lower end face of the positioning ring, and the outer side face of the upper section of the lower rubber valve is in interference sealing connection with the cavity wall of the element cavity.
As a further improvement of the scheme, the positioning ring is arranged between the upper cover and the lower cover.
As a further improvement of the scheme, the lower cover is externally sleeved with an internal thread sleeve, and the internal thread sleeve and the lower cover are integrally formed.
As a further improvement of the scheme, the glue feeding valve and/or the glue discharging valve are made of rubber or silica gel.
The utility model has the advantages that: because of the arrangement of the glue feeding valve and the glue discharging valve, double sealing can be realized, after infusion is completed, when the head of the infusion tube is drawn outwards, the pressure of blood on the liquid outlet notch can make the liquid outlet notch sealed, so that backflow is prevented, and after the head of the infusion tube is drawn out, the insertion notch is sealed, so that the pressure of a valve cavity between the insertion notch and the liquid outlet notch is balanced, and the backflow phenomenon of blood is greatly reduced. The utility model is used for medical equipment.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.
Fig. 1 is a schematic sectional view of a front view structure of an embodiment of the present invention.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. The utility model provides an each technical feature can the interactive combination under the prerequisite of conflict each other.
referring to fig. 1, this is an embodiment of the invention, specifically:
A balanced pressure needleless infusion joint comprises an upper cover 1 and a lower cover 2 which are cylindrical barrel cavities and are communicated up and down, wherein the lower section of the upper cover 1 is sleeved with the upper section of the lower cover 2, the barrel cavities of the upper cover 1 and the lower cover 2 are communicated to form an element cavity, a valve body 3 is fixedly connected in the element cavity, a valve cavity 31 with a downward opening is arranged in the valve body 3, a liquid through hole 32 communicated with the valve cavity 31 is arranged on the valve body 3, an elastic sizing valve 4 is sleeved on the upper section of the valve body 3, the lower end of the sizing valve 4 is fixedly connected with the upper cover 1, a normally closed insertion notch 43 is arranged on the upper end face of the sizing valve 4, the liquid through hole 32 is arranged in the valve cavity 31, a liquid inlet cavity 44 is arranged on the sizing valve 4, the liquid inlet cavity 44 is arranged below the insertion notch 43, and the liquid inlet cavity 44 is communicated with the valve cavity; lower rubber valve 5 has been cup jointed to the hypomere of valve body 3, lower rubber valve 5 and component chamber fixed connection, lower rubber valve 5 cover is on the opening of valve chamber 31 below, and the lower extreme of valve chamber 31 is the sphere, is equipped with the criss-cross play liquid incision 6 of normally closed on the lower extreme of valve chamber 31, and valve chamber 31 communicates through going out liquid incision 6 with the barrel cavity of lower cover 2, goes up rubber valve 4, lower rubber valve 5 all with the outer wall sealing connection of valve body 3, goes out the upside and the downside of liquid incision 6 and all is equipped with and holds the space that becomes.
Because of the arrangement of the glue feeding valve and the glue discharging valve, double sealing can be realized, after infusion is completed, when the head of the infusion tube is drawn outwards, the pressure of blood on the liquid outlet notch can make the liquid outlet notch sealed, so that backflow is prevented, and after the head of the infusion tube is drawn out, the insertion notch is sealed, so that the pressure of a valve cavity between the insertion notch and the liquid outlet notch is balanced, and the backflow phenomenon of blood is greatly reduced.
And when stretching into the liquid chamber with the infusion tube head from inserting the incision, go up the rubber valve and can be compressed down, then withdraw, because go out the notched setting of liquid, the lower extreme that is the valve pocket of sphere can up be out of shape, thereby open out the liquid incision, just so can realize the operation of withdrawing, then the infusion of going into the liquid chamber, liquid gets into the valve intracavity through leading to the liquid hole, liquid leads to the fact pressure to going out the liquid incision from the below export of valve pocket, the lower extreme that is the valve pocket of sphere resumes original shape, it opens to go on to add the liquid incision after the pressure, thereby let liquid flow out from the downside export of the section of thick bamboo chamber of lower cover.
In order to prevent the gluing valve from being distorted or bent when the gluing valve deforms downwards, the middle section of the gluing valve 4 is integrally conical, the middle section of the gluing valve 4 comprises reinforcing rings 41 which are sequentially arranged from top to bottom at intervals, and two adjacent reinforcing rings 41 are connected by a thin-walled elastic lantern ring 42.
in order to enhance the sealing, a positioning ring 33 is arranged on the outer wall of the valve body 3, and the lower end face of the glue applying valve 4 is abutted against the upper end face of the positioning ring 33.
In order to prevent the glue valve from dropping out and ensure the sealing butt joint of the glue valve 4 and the positioning ring 33, a butt conical surface with a downward conical surface is arranged on the cavity wall of the cylinder cavity of the upper cover 1, a prepressing conical ring 431 with an upward conical surface is arranged on the glue valve 4, the conical surface of the prepressing conical ring 431 is butted with the conical surface of the butt conical surface, and the lower end surface of the glue valve 4 is connected with the upper end surface of the positioning ring 33 in a sealing manner.
In order to improve the sealing effect, the peripheral surface of the lower section of the gluing valve 4 is in interference sealing connection with the cavity wall of the element cavity.
Similarly, in order to enhance the sealing, a positioning ring 33 is provided on the outer wall of the valve body 3, and the upper end surface of the lower glue valve 5 abuts against the lower end surface of the positioning ring 33.
In order to improve the sealing effect, the upper end face of the lower rubber valve 5 is in sealing connection with the lower end face of the positioning ring 33, and the outer side face of the upper section of the lower rubber valve 5 is in interference sealing connection with the cavity wall of the element cavity.
For the convenience of assembly and production, the positioning ring 33 is arranged between the upper cover 1 and the lower cover 2. An internal thread sleeve 7 is sleeved outside the lower cover 2, and the internal thread sleeve 7 and the lower cover 2 are integrally formed.
The glue feeding valve and/or the glue discharging valve are made of rubber or silica gel.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (10)
1. A balanced pressure needleless infusion joint is characterized in that: comprises an upper cover (1) and a lower cover (2) which are both cylindrical and have a through-going cylinder cavity, the lower section of the upper cover (1) is sleeved with the upper section of the lower cover (2), the upper cover (1), the cylinder cavity of the lower cover (2) is communicated to form an element cavity, a valve body (3) is fixedly connected in the element cavity, a valve cavity (31) with a downward opening is arranged in the valve body (3), a liquid through hole (32) communicated with the valve cavity (31) is formed in the valve body (3), an elastic gluing valve (4) is sleeved on the upper section of the valve body (3), the lower end of the gluing valve (4) is fixedly connected with the upper cover (1), a normally closed insertion notch (43) is formed in the upper end face of the gluing valve (4), the liquid through hole (32) is formed in the valve cavity (31), a liquid inlet cavity (44) is formed in the gluing valve (4), the liquid inlet cavity (44) is formed below the insertion notch (43), and the liquid inlet cavity (44) is communicated with the valve cavity (31) through the liquid through hole (32);
Lower rubber valve (5) have been cup jointed to the hypomere of valve body (3), lower rubber valve (5) and component chamber fixed connection, lower rubber valve (5) cover is on valve pocket (31) below opening, the lower extreme of valve pocket (31) is the sphere, be equipped with the criss-cross play liquid incision (6) of normally closed on the lower extreme of valve pocket (31), valve pocket (31) and the barrel chamber of lower cover (2) are through going out liquid incision (6) intercommunication, go up rubber valve (4), lower rubber valve (5) all with the outer wall sealing connection of valve body (3), the upside and the downside of going out liquid incision (6) all are equipped with the volume and become the space.
2. The balanced pressure needle-free infusion connector according to claim 1, wherein: the middle section of the gluing valve (4) is integrally conical, the middle section of the gluing valve (4) comprises reinforcing rings (41) which are sequentially arranged from top to bottom at intervals, and two adjacent reinforcing rings (41) are connected through a thin-walled elastic sleeve ring (42).
3. The balanced pressure needle-free infusion connector according to claim 1, wherein: a positioning ring (33) is arranged on the outer wall of the valve body (3), and the lower end face of the gluing valve (4) is abutted against the upper end face of the positioning ring (33).
4. The balanced pressure needle-free infusion connector according to claim 3, wherein: the upper cover (1) is provided with a downward conical surface for abutting connection on the wall of the cylinder cavity, the gluing valve (4) is provided with an upward conical surface for prepressing conical ring (431), the conical surface of the prepressing conical ring (431) abuts against the conical surface of the abutting connection conical surface, and the lower end surface of the gluing valve (4) is hermetically connected with the upper end surface of the positioning ring (33).
5. The balanced pressure needle-free infusion connector according to claim 3, wherein: the peripheral surface of the lower section of the gluing valve (4) is in interference sealing connection with the cavity wall of the element cavity.
6. The balanced pressure needle-free infusion connector according to claim 1, wherein: and a positioning ring (33) is arranged on the outer wall of the valve body (3), and the upper end surface of the lower rubber valve (5) is abutted against the lower end surface of the positioning ring (33).
7. The needle-free infusion connector with balanced pressure according to claim 6, wherein: the upper end face of the lower rubber valve (5) is hermetically connected with the lower end face of the positioning ring (33), and the outer side face of the upper section of the lower rubber valve (5) is hermetically connected with the cavity wall of the element cavity in an interference manner.
8. The balanced pressure needle-free infusion connector according to claim 3 or 6, wherein: the positioning ring (33) is arranged between the upper cover (1) and the lower cover (2).
9. the balanced pressure needle-free infusion connector according to claim 1, wherein: an internal thread sleeve (7) is sleeved outside the lower cover (2), and the internal thread sleeve (7) and the lower cover (2) are integrally formed.
10. The balanced pressure needle-free infusion connector according to claim 1, wherein: the glue feeding valve (4) and/or the glue discharging valve (5) are made of rubber or silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822269109.1U CN209790516U (en) | 2018-12-29 | 2018-12-29 | Balanced pressure needleless infusion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822269109.1U CN209790516U (en) | 2018-12-29 | 2018-12-29 | Balanced pressure needleless infusion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209790516U true CN209790516U (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822269109.1U Active CN209790516U (en) | 2018-12-29 | 2018-12-29 | Balanced pressure needleless infusion joint |
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| Country | Link |
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| CN (1) | CN209790516U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114177408A (en) * | 2021-12-08 | 2022-03-15 | 江苏采纳医疗科技有限公司 | Adjustable needleless infusion joint |
-
2018
- 2018-12-29 CN CN201822269109.1U patent/CN209790516U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114177408A (en) * | 2021-12-08 | 2022-03-15 | 江苏采纳医疗科技有限公司 | Adjustable needleless infusion joint |
| CN114177408B (en) * | 2021-12-08 | 2024-06-14 | 江苏采纳医疗科技有限公司 | Adjustable needleless infusion connector |
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