CN217015075U

CN217015075U - Medical one-way valve

Info

Publication number: CN217015075U
Application number: CN202122395206.7U
Authority: CN
Inventors: 金辉; 郑跃连
Original assignee: Hebei Shengtai Biotechnology Co ltd
Current assignee: Hebei Shengtai Biotechnology Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-07-22
Anticipated expiration: 2031-09-30

Abstract

The utility model discloses a medical one-way valve, which belongs to the technical field of medical instruments and comprises a valve body and a stop membrane arranged in a valve cavity of the valve body, and the key points are as follows: and a bulge and a first annular boss which is matched with the stop diaphragm to seal or open the upstream fluid passage port are respectively arranged at the downstream fluid passage port and the upstream fluid passage port of the valve cavity, and the outer diameter of the first annular boss is smaller than the diameter of the stop diaphragm. The beneficial effects of the utility model are: (1) one or more annular bosses are arranged and matched with the cut-off membrane, so that complete cut-off is realized; (2) the two tubular connecting pieces are fixed by the fixing parts at the outer parts and are positioned by the positioning parts and the connecting holes at the inner parts, so that the two tubular connecting pieces can be conveniently and quickly connected; (3) the limiting boss is arranged on the inner wall of the connecting hole, so that the limiting can be circumferentially carried out on the stop diaphragm, and meanwhile, the friction force of the diaphragm in the axial movement process is also reduced.

Description

Medical one-way valve

Technical Field

The utility model belongs to the field of medical instruments, and particularly relates to a medical one-way valve.

Background

The medical one-way valve is widely applied to the fields of medical operations, hemodialysis, medicine preparation and the like, and has the function of ensuring that fluid can only flow in one direction when liquid or gas is extracted, and preventing the fluid from flowing backwards. For example, PET radiopharmaceuticals are used for the diagnosis and treatment of tumors, cardiovascular diseases and neuropsychiatric diseases, and a one-way valve is required in the preparation of such positron-emitting radiopharmaceuticals.

At present, a commonly used check valve generally comprises a valve body, a valve core, an elastic part and a silica gel sealing ring, wherein the elastic part is communicated with the valve core compressed by a metal spring and the like for sealing.

In order to solve the above technical problem, for example, the publication No. CN101829370B discloses a check valve for hemodialysis machine, in which a diaphragm is limited by a cavity wall of a first connecting seat and a rib plate in a second connecting seat together to realize one-way stopping and opening.

The prior art has the problem that the stop cannot be completely realized when the pressure is small due to manufacturing errors of a cavity wall and a diaphragm.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a medical one-way valve, wherein a stop diaphragm is stopped by an annular boss, so that complete stop can be realized.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a medical check valve, includes the valve body and sets up stop the diaphragm in the valve chamber of valve body, the key lies in: and a bulge and a first annular boss which is matched with the stop diaphragm to seal or open the upstream fluid passage port are respectively arranged at the downstream fluid passage port and the upstream fluid passage port of the valve cavity, and the outer diameter of the first annular boss is smaller than the diameter of the stop diaphragm.

Further, a second annular boss is coaxially arranged on the inner side of the first annular boss.

Furthermore, a second annular boss is coaxially arranged on the outer side of the first annular boss, and the outer diameter of the second annular boss is smaller than the diameter of the stop diaphragm.

Further, at least 3 protrusions are arranged along the circumference of the downstream fluid channel port.

Furthermore, the valve body comprises a first tubular connecting piece and a second tubular connecting piece connected with the first tubular connecting piece, an upstream fluid passage is arranged in the first tubular connecting piece, a downstream fluid passage coaxial with the upstream fluid passage is arranged in the second tubular connecting piece, and the valve cavity is positioned at the joint of the first tubular connecting piece and the second tubular connecting piece.

Furthermore, a connecting hole is formed in the end portion of the second tubular connecting piece, the diameter of the connecting hole is larger than that of the downstream fluid channel, and the protrusion is arranged on the inner end face of the connecting hole.

Furthermore, a positioning part matched with the connecting hole is arranged at the end part of the first tubular connecting piece, the first annular boss is arranged at the end part of the positioning part, and the positioning part is matched with the inner end face of the connecting hole to form a valve cavity.

Furthermore, the hole wall of the connecting hole is provided with a limiting boss used for limiting the stop diaphragm, and at least 3 limiting bosses are arranged along the circumferential direction of the connecting hole.

Furthermore, the limiting lug boss is connected with the protrusion.

Furthermore, the connecting ends of the first tubular connecting piece and the second tubular connecting piece are provided with fixing parts extending outwards, and the two fixing parts are bonded or welded together.

The beneficial effects of the utility model are: (1) one or more annular bosses are arranged and matched with the cut-off membrane, so that complete cut-off is realized; (2) the two tubular connecting pieces are fixed by the fixing parts at the outer parts and are positioned by the positioning parts and the connecting holes at the inner parts, so that the two tubular connecting pieces can be conveniently and quickly connected; (3) the inner wall of the connecting hole is provided with a limiting boss, so that the limiting diaphragm can be limited in the circumferential direction, and the friction force of the diaphragm during axial movement is reduced; (4) the design of spacing boss and protruding integral type can reduce the cost of mould.

The present invention will be described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of the medical check valve of the present invention;

fig. 2 is a schematic structural view of a second embodiment of the medical check valve of the present invention (after the stop diaphragm is removed).

In the attached drawing, 1, a stop diaphragm, 2, a first annular boss, 3, a second annular boss, 4, a bulge, 5, a first tubular connecting piece, 5-1, an upstream fluid passage, 5-2, a positioning part, 6, a second tubular connecting piece, 6-1, a downstream fluid passage, 6-2, a connecting hole, 6-3, a limiting boss, A, a valve cavity, B and a fixing part are arranged.

Detailed Description

Referring to the attached drawing 1, the utility model provides a medical one-way valve, which comprises a valve body and a stop diaphragm 1 arranged in a valve cavity A of the valve body, and is characterized in that: a bulge 4 and a first annular boss 2 which is matched with the stop diaphragm 1 to seal or open the upstream fluid passage port are respectively arranged at the downstream fluid passage port and the upstream fluid passage port of the valve cavity A, and the outer diameter of the first annular boss 2 is smaller than the diameter of the stop diaphragm 1.

For further improvement of the effect, a second annular boss 3 may also be provided coaxially inside the first annular boss 2, as shown in fig. 2. Or a second annular boss 3 is coaxially arranged on the outer side of the first annular boss 2, and the outer diameter of the second annular boss 3 is smaller than the diameter of the stop diaphragm 1. The section of the annular boss is semicircular or square with the two sides of the top being rounded, so that burrs can be avoided as much as possible in the manufacturing process.

The number of the projections 4 is at least 3 along the circumference of the downstream fluid passage port. When the fluid is circulated, the stop diaphragm 1 is limited by the bulges 4, and the fluid enters the downstream fluid channel 6-1 through the gap between the adjacent bulges 4.

The valve body comprises a first tubular connecting piece 5 and a second tubular connecting piece 6 connected to the first tubular connecting piece 5. An upstream fluid passage 5-1 is arranged in the first tubular connecting piece 5, a downstream fluid passage 6-1 coaxial with the upstream fluid passage 5-1 is arranged in the second tubular connecting piece 6, and the valve cavity A is positioned at the joint of the first tubular connecting piece 5 and the second tubular connecting piece 6. The upstream and downstream fluid passage ports are defined at the junctions of the upstream and downstream fluid passages 5-1 and 6-1 with the valve chamber a.

The end part of the second tubular connecting piece 6 is provided with a connecting hole 6-2, the diameter of the connecting hole 6-2 is larger than that of the downstream fluid channel 6-1, and the bulge 4 is arranged on the inner end surface of the connecting hole 6-2.

In order to connect the two tubular connecting pieces conveniently, a positioning part 5-2 matched with the connecting hole 6-2 is arranged at the end part of the first tubular connecting piece 5, and the positioning part 5-2 is also annular. The first annular boss 2 is arranged at the end part of the positioning part 5-2, and the positioning part 5-2 is matched with the inner end face of the connecting hole 6-2 to form a valve cavity A.

The hole wall of the connecting hole 6-2 is provided with a limit boss 6-3 for limiting the stop diaphragm 1. The limiting bosses 6-3 are provided with at least 3 limiting bosses along the circumferential direction of the connecting holes 6-2 and are connected with the protrusions 4, the design can reduce the complexity of the die and the cost. The limiting boss 6-3 can prevent the stopping diaphragm 1 from rapidly moving between the annular boss and the bulge 4 due to the influence of large friction force between the stopping diaphragm 1 and the wall of the valve cavity A when the stopping diaphragm moves between the annular boss and the bulge 4.

The connecting ends of the first tubular connecting piece 5 and the second tubular connecting piece 6 are respectively provided with a fixing part B extending outwards, and the two fixing parts B are bonded or fixed together by ultrasonic welding to form an integrated structure of the valve.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: modifications to the specific embodiments of the utility model or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the utility model as defined by the appended claims.

Claims

1. The utility model provides a medical check valve, includes the valve body and sets up by diaphragm (1) in the valve pocket (A) of valve body, its characterized in that: a bulge (4) and a first annular boss (2) which is matched with the stop diaphragm (1) to seal or open the upstream fluid passage port are respectively arranged at the downstream fluid passage port and the upstream fluid passage port of the valve cavity (A), and the outer diameter of the first annular boss (2) is smaller than the diameter of the stop diaphragm (1).

2. The medical check valve as claimed in claim 1, wherein: and a second annular boss (3) is coaxially arranged on the inner side of the first annular boss (2).

3. The medical check valve as claimed in claim 1, wherein: and a second annular boss (3) is coaxially arranged on the outer side of the first annular boss (2), and the outer diameter of the second annular boss (3) is smaller than the diameter of the stop diaphragm (1).

4. The medical check valve as claimed in claim 1, wherein: at least 3 projections (4) are arranged along the circumference of the downstream fluid passage port.

5. The medical check valve as claimed in any of claims 1-4, wherein: the valve body comprises a first tubular connecting piece (5) and a second tubular connecting piece (6) connected with the first tubular connecting piece (5), an upstream fluid channel (5-1) is arranged in the first tubular connecting piece (5), a downstream fluid channel (6-1) coaxial with the upstream fluid channel (5-1) is arranged in the second tubular connecting piece (6), and the valve cavity (A) is located at the joint of the first tubular connecting piece (5) and the second tubular connecting piece (6).

6. The medical check valve as claimed in claim 5, wherein: a connecting hole (6-2) is formed in the end portion of the second tubular connecting piece (6), the diameter of the connecting hole (6-2) is larger than that of the downstream fluid channel (6-1), and the protrusion (4) is arranged on the inner end face of the connecting hole (6-2).

7. The medical check valve as claimed in claim 6, wherein: the end part of the first tubular connecting piece (5) is provided with a positioning part (5-2) matched with the connecting hole (6-2), the first annular boss (2) is arranged at the end part of the positioning part (5-2), and the positioning part (5-2) is matched with the inner end face of the connecting hole (6-2) to form a valve cavity (A).

8. The medical check valve as claimed in claim 6, wherein: the limiting bosses (6-3) used for limiting the stop diaphragm (1) are arranged on the hole walls of the connecting holes (6-2), and at least 3 limiting bosses (6-3) are arranged along the circumferential direction of the connecting holes (6-2).

9. The medical check valve as claimed in claim 8, wherein: the limiting boss (6-3) is connected with the protrusion (4).

10. The medical check valve as claimed in claim 5, wherein: the connecting ends of the first tubular connecting piece (5) and the second tubular connecting piece (6) are provided with fixing parts (B) extending outwards, and the two fixing parts (B) are bonded or welded together.