CN214579102U

CN214579102U - Medical one-way valve

Info

Publication number: CN214579102U
Application number: CN202120717248.5U
Authority: CN
Inventors: 苏志英
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-11-02
Anticipated expiration: 2031-04-08

Abstract

The utility model discloses a medical one-way valve, which comprises a valve body, a pressing piece and an elastic sealing piece, wherein the valve body is a component with a hollow structure, the pressing piece and the elastic sealing piece are arranged in the valve body, the inner cavity wall of the valve body is provided with a first sealing surface, the elastic sealing piece is provided with a second sealing surface, and the elastic sealing piece is propped against between the pressing piece and the first sealing surface; in a working state, the elastic sealing element is stressed to deform, the second sealing surface is separated from the first sealing surface to form a conduction gap, and the upper cavity and the lower cavity of the valve body are conducted; when the elastic sealing element is not stressed, the elastic sealing element returns to a sealing state by means of self elasticity. The utility model discloses a valve body upper end forms the throat, need not to use the interference that the screw thread also can realize and face guard etc. to be connected, simple to operate to can prevent that the gland atress is too big and break away from the valve body.

Description

Medical one-way valve

Technical Field

The utility model relates to a medical accessory check valve technical field, concretely relates to medical check valve.

Background

The medical one-way valve has a wide application range, and medical products such as an indwelling needle, an anaesthetic mask and the like need to use the medical one-way valve. The existing medical one-way valve generally uses a spring to provide pre-compression force to realize a one-way function, but the axial height of the spring in the machining process is generally difficult to control, so that the opening pressure of the one-way valve is unstable. In addition, some current medical check valves can use the gland to carry out the precompression, but the fastening mode of current gland is not firm, and when the atress was too big, the gland appeared collapsing easily, and the malfunction causes the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a solve at least a defect or problem that exists among the background art, provide a medical check valve, this medical check valve need not to use the spring, the stability of check valve opening pressure.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a medical one-way valve comprises a valve body, a pressing piece and an elastic sealing piece, wherein the valve body is a hollow structural component, the pressing piece and the elastic sealing piece are arranged in the valve body, a first sealing surface is arranged on the wall of an inner cavity of the valve body, the elastic sealing piece is provided with a second sealing surface, and the elastic sealing piece is propped between the pressing piece and the first sealing surface; in a working state, the elastic sealing element is stressed to deform, the second sealing surface is separated from the first sealing surface to form a conduction gap, and the upper cavity and the lower cavity of the valve body are conducted; when the elastic sealing element is not stressed, the elastic sealing element returns to a sealing state.

Preferably, the compressing part is a ring-shaped gland with a through hole, a groove for accommodating the gland is formed in the wall of the inner cavity of the valve body, the upper groove wall of the groove is obliquely arranged, and the gland is arranged in the groove.

Preferably, the elastic sealing element is a U-shaped cup-shaped elastic valve core with an opening at the upper end, the elastic valve core comprises a bottom wall and a side wall, and the side wall can deform under elastic stress; the gland is provided with a convex rib extending downwards; the convex rib is embedded into the upper end opening of the elastic valve core.

Preferably, a gap is formed between the outer side wall of the upper part of the elastic valve core and the cavity wall of the middle part of the valve body to form a conducting channel; the conduction channel is communicated with the through hole of the gland; the bottom end of the cavity wall in the middle of the valve body is obliquely arranged to form a first sealing surface, and the periphery of the bottom wall of the elastic valve core is obliquely arranged to form a second sealing surface.

Preferably, the cavity wall of the middle part of the valve body is provided with a plurality of first ribs arranged at intervals, the outer side wall of the upper part of the elastic valve core is tightly attached to the end faces of the first ribs, and the concave parts between every two adjacent first ribs form the conduction channels.

Preferably, the outer side wall of the elastic valve core is provided with second ribs less than the first ribs, and the second ribs are embedded between two adjacent first ribs.

Preferably, the valve body is made of transparent plastic.

Preferably, the valve body is cylindrical, and the necking is a tapered necking.

Compared with the background art, the technical scheme of the utility model, have following advantage:

1. the upper end of the valve body forms a necking, interference connection with a mask and the like can be realized without using threads, and the installation is convenient; and the pressing piece can be prevented from being separated from the valve body due to overlarge stress.

2. The utility model discloses a recess and the throat of medical check valve form dual restriction to the gland, prevent that the gland atress is too big and break away from the valve body.

3. The utility model discloses an elasticity inner core can adopt silica gel or other elastomer preparation, and the machining precision is high, and the size is stable, and the check valve opening pressure is stable. The semi-finished valve body can be designed into a single part for one-time injection molding, the precision is high, the injection mold is simple, and the manufacturing cost is low.

Drawings

In order to more clearly illustrate the technical solution of the embodiments, the drawings needed to be used are briefly described as follows:

FIG. 1 is a schematic perspective view of a cross-section of a check valve;

FIG. 2 is a schematic perspective view of a cross-section of a valve body;

FIG. 3 is a schematic cross-sectional view of a resilient valve cartridge;

FIG. 4 is a side schematic view of a resilient valve cartridge;

FIG. 5 is a perspective view of the gland;

FIG. 6 is a schematic view of the installation process of the check valve 1;

FIG. 7 is a schematic view of the installation process of the check valve 2;

FIG. 8 is a schematic view of a process of example two;

FIG. 9 is a schematic illustration of a third process of an embodiment;

FIG. 10 is a schematic cross-sectional view of a check valve;

reference numerals: 100. a valve body; 110. a groove; 111. an upper tank wall; 120. a first sealing surface; 130. a first rib; 131. conducting a channel; 140. necking; 200. an elastic valve core; 210. a bottom wall; 211. a second sealing surface; 220. a side wall; 221. a second rib; 300. a gland; 310. a circular ring; 320. a rib is protruded; 330. a through hole; 400. and (5) molding.

Detailed Description

In the description of the present invention, the directions or positional relationships indicated by "up" and "down" are the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and the indication or suggestion that the indicated device must have a specific direction, be constructed and operated in a specific direction is not intended to limit the scope of the present invention.

The utility model discloses a medical check valve, including valve body 100, compress tightly piece and elastic sealing element, valve body 100 is hollow structure's part, compresses tightly piece and elastic sealing element and installs in valve body 100, and cavity wall is equipped with first sealed face in valve body 100, and elastic sealing element is equipped with the sealed face of second, and elastic sealing element supports on the top compressing tightly between piece and the first sealed face, and the inside slope of 100 upper ends of valve body forms the throat. The specific implementation mode is as follows:

the first embodiment is as follows:

as shown in fig. 1-10, a medical check valve comprises a valve body 100, an elastic valve core 200 and a circular gland 300 with a through hole 330, wherein the valve body 100 is a hollow component, a groove 110 for accommodating the gland 300 is formed in the inner cavity wall of the valve body 100, the gland 300 is arranged in the groove 110, the upper and lower groove walls of the groove 110 play a role in limiting, and the gland 300 is prevented from being separated from the valve body 100 after being stressed; the upper end of the valve body 100 is inclined inwards to form a reducing mouth 140, the diameter of the reducing mouth 140 is smaller than that of the gland 300, and the gland 300 can be limited to be separated from the valve body 100; the wall of the inner cavity of the valve body 100 is provided with a first sealing surface 120; the elastomeric valve cartridge 200 is provided with a second sealing surface 211; the elastic valve core 200 is abutted between the gland 300 and the first sealing surface 120; in a sealing state, the second sealing surface 211 is tightly attached to the first sealing surface 120 to form a seal, and the upper cavity and the lower cavity of the valve body 100 are not communicated; in a working state, the elastic valve core 200 is stressed and deformed, the second sealing surface 211 is separated from the first sealing surface 120 to form a conduction gap, and the upper cavity and the lower cavity of the valve body 100 are conducted; when the elastic valve core 200 is not stressed, the elastic valve core returns to the sealing state by means of self elasticity.

Specifically, the upper groove wall 111 of the groove 110 of the present embodiment is disposed obliquely. The upper groove wall 111 of the groove 110 is inclined to facilitate the mold release during the manufacture of the valve body 100.

Specifically, the resilient valve element 200 of the present embodiment is in a U-shaped cup shape, and has an opening at the upper end, including a bottom wall 210 and a side wall 220, where the side wall 220 is resiliently deformed by a force.

Specifically, the gland 300 of the present embodiment includes a hollow circular ring 310, a "cross-shaped" rib 320 extending downward is disposed in the middle of the circular ring 310, and a through hole 330 is formed between the rib 320 and the circular ring 310; the rib 320 is inserted into the upper end opening of the elastic valve core 200.

Specifically, a gap is formed between the outer side wall 220 of the upper portion of the elastic valve element 200 and the middle cavity wall of the valve body 100 to form a conducting channel 131; the conduction channel 131 communicates with the through hole 330 of the gland 300; the bottom end of the middle cavity wall of the valve body 100 is obliquely arranged to form a first sealing surface 120, and the periphery of the bottom wall 210 of the elastic valve core 200 is obliquely arranged to form a second sealing surface 211.

Specifically, the cavity wall in the middle of the valve body 100 of this embodiment is provided with a plurality of first ribs 130 arranged at intervals, the outer side wall 220 on the upper portion of the elastic valve core 200 is tightly attached to the end surface of the first ribs 130, and the concave portions between every two adjacent first ribs 130 form the conduction channels 131.

Specifically, the outer side wall 220 of the resilient valve element 200 of the present embodiment is provided with second ribs 221 with the number less than that of the ribs, and the second ribs 221 are embedded between two adjacent first ribs 130 and have a certain gap with the cavity wall of the valve body 100. The second rib 221 is positioned in the middle of the first rib 130 to prevent rotation, and the elastic valve element 200 does not stick to the cavity wall of the valve body 100 to block the conduction channel 131 when deforming.

Specifically, the valve body 100 of the present embodiment is a transparent plastic member, which can facilitate observation of the direction of the injected liquid or gas; the gland 300 is a plastic part, and the elastic valve core 200 is a silica gel part.

Specifically, the valve body 100 of the present embodiment has a cylindrical shape, and the necking 140 is a tapered necking 140.

In the initial sealing state of the check valve of this embodiment, the second sealing surface 211 on the lower outer sidewall 220 of the elastic valve element 200 is tightly attached to the first sealing surface 120 of the inner cavity of the valve body 100 to form a seal, and the upper and lower cavities of the valve body 100 are not communicated; in a working state, the elastic valve core 200 is forced upwards, the side wall 220 of the elastic valve core 200 deforms, the second sealing surface 211 is separated from the first sealing surface 120 to form a conduction gap, and at the moment, gas or liquid can enter the conduction channel 131 formed by the outer side wall 220 of the elastic valve core 200 and the inner cavity wall of the valve body 100 through the conduction gap, flow to the through hole 330 of the gland 300 through the conduction channel 131, and finally flow out of the outlet at the upper end of the valve body 100; after the use, the elastic valve core 200 is not stressed any more, and at the moment, the elastic valve core 200 returns to the sealing state by the elasticity of the elastic valve core 200, so as to prevent the gas or the liquid from flowing backwards.

The utility model discloses a production manufacturing method of medical check valve does:

the method comprises the following steps: respectively producing and manufacturing a finished product of the elastic valve core 200, the gland 300 and a semi-finished valve body 100 'of which the upper end part of the valve body 100 is not inclined inwards to form a necking 140, wherein the semi-finished valve body 100' is integrally formed by injection molding;

step two: sequentially loading the elastic valve core 200 and the gland 300 into the semi-finished valve body 100';

step three: heating the upper end of the semi-finished valve body 100 'with the elastic valve core 200 and the valve cover to soften the upper end of the semi-finished valve body 100' for shaping;

step four: fixing the semi-finished valve body 100 ', and extruding the upper end part of the semi-finished valve body 100' into the inward-inclined necking 140 by using the die 400; or the semi-finished valve body 100 'is rotated and an inward pressure F1 is applied to the upper end of the semi-finished valve body 100' to tilt it to form an inwardly tilted throat 140.

The utility model discloses a recess and the throat of medical check valve form dual restriction to the gland, prevent that the gland atress is too big and break away from the valve body.

The utility model discloses an elasticity inner core can adopt silica gel or other elastomer preparation, and the machining precision is high, and the size is stable, and the check valve opening pressure is stable. The semi-finished valve body can be designed into a single part for one-time injection molding, the precision is high, the injection mold is simple, and the manufacturing cost is low.

The description of the above specification and examples is intended to illustrate the scope of the invention, but should not be construed as limiting the scope of the invention.

Claims

1. A medical one-way valve comprises a valve body, a pressing piece and an elastic sealing piece, wherein the valve body is a hollow structural component, the pressing piece and the elastic sealing piece are arranged in the valve body, a first sealing surface is arranged on the wall of an inner cavity of the valve body, the elastic sealing piece is provided with a second sealing surface, and the elastic sealing piece is propped between the pressing piece and the first sealing surface; in a working state, the elastic sealing element is stressed to deform, the second sealing surface is separated from the first sealing surface to form a conduction gap, and the upper cavity and the lower cavity of the valve body are conducted; when the elastic sealing element is not stressed, the elastic sealing element returns to a sealing state.

2. The medical check valve as claimed in claim 1, wherein the compressing member is a ring-shaped gland having a through hole, the inner cavity wall of the valve body is provided with a groove for accommodating the gland, the upper groove wall of the groove is inclined, and the gland is disposed in the groove.

3. The medical check valve as claimed in claim 2, wherein the elastic sealing member is a U-shaped cup-shaped elastic valve core with an opening at the upper end, the elastic valve core comprises a bottom wall and a side wall, and the side wall can deform under elastic stress; the gland is provided with a convex rib extending downwards; the convex rib is embedded into the upper end opening of the elastic valve core.

4. The medical check valve as claimed in claim 3, wherein a gap is formed between the outer side wall of the upper portion of the elastic valve core and the wall of the middle cavity of the valve body to form a communication channel; the conduction channel is communicated with the through hole of the gland; the bottom end of the cavity wall in the middle of the valve body is obliquely arranged to form a first sealing surface, and the periphery of the bottom wall of the elastic valve core is obliquely arranged to form a second sealing surface.

5. The medical check valve as claimed in claim 4, wherein the wall of the middle chamber of the valve body is provided with a plurality of first ribs arranged at intervals, the outer side wall of the upper portion of the elastic valve core is tightly attached to the end faces of the first ribs, and the concave portions between every two adjacent first ribs form the conduction channels.

6. The medical check valve as claimed in claim 5, wherein the outer side wall of said elastic valve core is provided with a number of second ribs less than the number of said first ribs, and the second ribs are embedded between two adjacent first ribs.

7. The medical check valve as claimed in claim 1, wherein said valve body is a transparent plastic member.

8. The medical check valve as claimed in any of claims 1-7, wherein said valve body is cylindrical and said constriction is a conical constriction.