CN219366898U

CN219366898U - Check valve assembly, check valve and medical equipment

Info

Publication number: CN219366898U
Application number: CN202223530082.XU
Authority: CN
Inventors: 贠海龙; 张凯
Original assignee: Beijing Aeonmed Co Ltd
Current assignee: Beijing Aeonmed Co Ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-07-18
Anticipated expiration: 2032-12-28

Abstract

The application discloses check valve assembly, check valve and medical equipment, the check valve assembly includes supporting shoe (10), diaphragm assembly (20) and spring (30), supporting shoe (10) are including internal passage (11), diaphragm assembly (20) include diaphragm seat (21) and install in diaphragm (22) of diaphragm seat (21), the first end of diaphragm seat (21) is passed through spring (30) biasing so that the second end of diaphragm seat (21) can stretch into internal passage (11) and pass through diaphragm (22) are sealed the port of internal passage (11). The check valve assembly of this application accomplishes operating condition's switching through the removal of diaphragm assembly, when the second end of diaphragm seat stretches into the internal passageway, can seal the internal passageway through the diaphragm reliably to ensure the normal use of check valve.

Description

Check valve assembly, check valve and medical equipment

Technical Field

The present application relates to the field of medical devices, and more particularly, to a one-way valve assembly, a one-way valve, and a medical device.

Background

Many medical equipment with air channels are provided with one-way valves, and the one-way valves are required to have the characteristics of small volume, reliable sealing and the like.

In the prior art, as shown in fig. 1, the check valve comprises a supporting block 10, an O-ring S, a sealing seat P, a spring 30 and a valve body 50, wherein the supporting block 10 is installed in the valve body 50, a spigot is arranged at the tail end of the supporting block 10, the O-ring S is arranged at one end of the sealing seat P, and the other end is pressed against the valve body 50 through the spring 30. When gas enters the air passage of the valve body 50 from right to left in fig. 1, the sealing seat P is biased leftwards by the spring 30, so that the O-ring S is sealed and pressed against the spigot, and the gas cannot pass through. When gas enters the channel in the supporting block 10 from left to right in fig. 1, the gas can push the sealing seat P, and the compression spring 30 moves towards the right, so that the O-ring S leaves the spigot to be discharged through the air passage of the valve body 50, and the effect of unidirectional ventilation is achieved.

However, since the operation state of the check valve is often switched, the O-ring S repeatedly presses against the spigot, and long-term use may cause abrasion of the O-ring S, which may lead to seal failure. Moreover, the O-ring may age with use or temperature rise, and adhesion of the O-ring S may occur, resulting in failure of the check valve for normal use.

Therefore, how to improve the reliability of the check valve is a technical problem to be solved by the present application.

Disclosure of Invention

In view of this, the present application proposes a check valve assembly to provide reliability of use of the check valve.

The application provides a check valve assembly, wherein, check valve assembly includes supporting shoe, diaphragm subassembly and spring, the supporting shoe includes the internal passage, the diaphragm subassembly include the diaphragm seat with install in the diaphragm of diaphragm seat, the first end of diaphragm seat passes through the spring bias, so that the second end of diaphragm seat can stretch into the internal passage and pass through the diaphragm is sealed the port of internal passage.

Optionally, the diaphragm seat includes a diaphragm mounting portion for mounting the diaphragm, and an end of the diaphragm mounting portion is provided with a flange provided with a guide tapered surface that mates with the internal channel.

Optionally, the diaphragm seat includes a spring mounting portion for mounting the spring, the spring mounting portion including a guide that slides along an inner wall of a bore in which the one-way valve assembly is mounted.

Optionally, the spring mounting portion includes at least three guides evenly distributed around the spring.

Optionally, the diaphragm is annular, the spring mounting portion is an annular member, the diaphragm mounting portion is columnar and coaxially arranged with the spring mounting portion, and a radial dimension of the diaphragm mounting portion is smaller than an outer diameter of the spring mounting portion, so that an annular groove for mounting the diaphragm is defined between the flange and the spring mounting portion.

Optionally, the support block includes a columnar body abutting the diaphragm assembly and a positioning flange disposed at an end of the columnar body remote from the diaphragm assembly.

Optionally, the outer periphery of the columnar body is provided with a mounting groove for mounting a sealing ring.

The present application also provides a one-way valve, wherein the one-way valve comprises the one-way valve assembly of the present application.

Optionally, the one-way valve comprises a valve body comprising a mounting cavity for mounting the one-way valve assembly and a gas passage communicating with the mounting cavity.

The present application also provides a medical device, wherein the medical device comprises the one-way valve of the present application.

According to the technical scheme of this application, the switching of operating condition is accomplished through the removal of diaphragm subassembly to the check valve subassembly of this application, when the second end of diaphragm seat stretches into the internal passageway, can seal the internal passageway through the diaphragm reliably to ensure the normal use of check valve.

Additional features and advantages of the present application will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 is a cross-sectional view of a prior art one-way valve;

FIG. 2 is a perspective view of a check valve assembly according to a preferred embodiment of the present application;

FIG. 3 is another perspective view of the check valve assembly of FIG. 2;

FIG. 4 is a front view of the check valve assembly of FIG. 2;

FIG. 5 is a longitudinal cross-sectional view taken along FIG. 4;

FIG. 6 is a perspective view of the diaphragm seat of FIG. 2;

FIG. 7 is a front view of the diaphragm mount of FIG. 6;

FIG. 8 is a view taken along the A-A plane in FIG. 7;

fig. 9 is a cross-sectional view of a one-way valve of an embodiment of the present application.

Detailed Description

The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in combination with embodiments.

According to one embodiment of the present application, there is provided a check valve assembly, wherein the check valve assembly includes a support block 10, a diaphragm assembly 20, and a spring 30, the support block 10 includes an internal passage 11, the diaphragm assembly 20 includes a diaphragm seat 21 and a diaphragm 22 mounted to the diaphragm seat 21, a first end of the diaphragm seat 21 is biased by the spring 30 so that a second end of the diaphragm seat 21 can extend into the internal passage 11 and seal a port of the internal passage 11 by the diaphragm 22.

The check valve assembly of the present application completes the switching of the working state by the movement of the diaphragm assembly 20, and when the second end of the diaphragm seat 21 extends into the internal passage 11, the internal passage 11 can be reliably sealed by the diaphragm 22, thereby ensuring the normal use of the check valve.

As shown in fig. 5, 6 and 9, the diaphragm seat 21 may include a diaphragm mounting portion 212 for mounting the diaphragm 22, and the diaphragm mounting portion 212 protrudes into the internal passage 11 when the check valve assembly is closed. To facilitate the switching of the diaphragm mounting portion 212 from the open state back to the closed state of the one-way valve assembly, the end of the diaphragm mounting portion 212 is provided with a flange 2121, said flange 2121 being provided with a guiding conical surface cooperating with said inner channel 11. By providing a guiding conical surface, on the one hand, the insertion of the membrane mounting portion 212 into the inner channel 11 can be guided, and on the other hand, a preliminary seal can be achieved by the engagement of the flange 2121 with the inner channel 11.

In addition, as shown in fig. 2, 3, 4 and 6, the diaphragm seat 21 may include a spring mounting portion 213 for mounting the spring 30, and one end of the spring 30 may be fixed to the spring mounting portion 213.

Preferably, the spring mounting portion 213 may include a guide 2131 that slides along an inner wall of a bore (e.g., mounting cavity 51, hereinafter) in which the one-way valve assembly is mounted. Thus, the direction of extension and retraction of the spring 30 and the movement of the diaphragm assembly 20 can be guided by the sliding of the guide 2131 along the orifice. The number and positions of the guide members 2131 may be set as desired, and more preferably, the spring mounting portion 213 includes at least three guide members 2131 uniformly distributed around the spring 30. Therefore, at least three-point support can be formed with the pore canal in the circumferential direction, and the guiding stability is enhanced.

The diaphragm 22, the diaphragm mounting portion 212 and the spring mounting portion 213 may take appropriate forms to achieve the respective functions. For example, the diaphragm 22 may be provided in a cap shape and fit over an end of the diaphragm mounting portion 212. Preferably, as shown in fig. 3, 5, 7 and 8, the diaphragm 22 may be ring-shaped, the spring mounting portion 213 is a ring-shaped member, the diaphragm mounting portion 212 is cylindrical and coaxially disposed with the spring mounting portion 213, and a radial dimension of the diaphragm mounting portion 212 is smaller than an outer diameter of the spring mounting portion 213 to define an annular groove 211 for mounting the diaphragm 22 between the flange 2121 and the spring mounting portion 213. Thereby, both sides of the diaphragm 22 can be positioned by the flange 2121 and the spring mounting portion 213, respectively, and the mounting of the diaphragm 22 is more stable while simplifying the structure.

The check valve assembly of the present application may be installed as a unitary assembly. For ease of installation, a cooperating locating feature may be provided on the mounting base (e.g., valve body 50, below). Since the first end of the diaphragm assembly 20 is inserted into the support block 10, a positioning structure may be provided on the support block 10. For example, as shown in fig. 4 and 9, the support block 10 includes a columnar body 12 abutting the diaphragm assembly 30 and a positioning flange 13 provided at an end of the columnar body 12 remote from the diaphragm assembly 20. The locating flange 13 may cooperate with a corresponding locating feature on the mounting base (e.g., a stop step on the valve body 50) to provide a locating function during installation. Wherein the positioning flange 13 may have a taper angle to enable guiding the mounting of the support block 10 while positioning.

Since the diaphragm assembly 20 and the spring 30 have relative movements with respect to the mounting base, the outer circumference of the cylindrical body 12 may be provided with a mounting groove 121 for mounting the sealing ring 40 in order to secure the sealing property of the check valve in the closed body. When the support block 10 is mounted on the mounting base, sealability between the support block 10 and the mounting base can be ensured by the seal ring 40.

The installation base can be the valve body 50 below, or the duct structure on the part needing to realize one-way ventilation, that is, the one-way valve assembly can be connected with the valve body 50 to form a one-way valve, or can be directly assembled to a proper duct structure to play a role in one-way ventilation.

According to another aspect of the present application, there is provided a one-way valve, wherein the one-way valve comprises the one-way valve assembly of the present application.

In the check valve of the present application, the switching of the operation state is completed by the movement of the diaphragm assembly 20, and when the second end of the diaphragm seat 21 is extended into the internal passage 11, the internal passage 11 can be reliably sealed by the diaphragm 22, thereby ensuring the normal use of the check valve.

As shown in fig. 9, the check valve may include a valve body 50, the valve body 50 including a mounting cavity 51 for mounting the check valve assembly and a gas passage 52 communicating with the mounting cavity 51. In use, the one-way valve assembly is mounted in the mounting cavity 51, when gas enters the gas channel 52 from right to left in fig. 9, the diaphragm assembly 20 makes the first end of the diaphragm seat 21 extend into the internal channel 11 under the pushing action of the spring 30 and seals the port of the internal channel 11 through the diaphragm 22, the one-way valve is in a closed state, and gas cannot enter the internal channel 11; when gas enters the internal passage 11 from left to right in fig. 9, the gas pushes the diaphragm seat 21 to move rightward against the elastic force of the spring 30, and the appropriate diaphragm 22 leaves the port of the internal passage 11, so that the gas can enter the gas passage 52 to be discharged, and unidirectional ventilation is realized.

It will be appreciated that the mounting cavity 51 may be provided with a corresponding cross-sectional shape depending on the specific configuration of the support block 10, the diaphragm assembly 20 and the spring 30, i.e. the mounting cavity 51 may have a varying cross-section. For example, a stepped structure may be provided at the junction of the mounting cavity 51 and the gas passage 52 to locate the end of the spring 30.

In order to ensure the movement of the diaphragm assembly 20 and the spring 30, the inner wall of the corresponding portion of the mounting cavity 51 is in clearance fit with the diaphragm assembly 20 and the spring 30, and in order to ensure the sealing property in the closed state, the mounting cavity 51 is sealed with the support block 10 by the above seal ring 40.

According to another aspect of the present application, a medical device is provided, wherein the medical device comprises a one-way valve of the present application.

The medical device of the present application can achieve stable unidirectional ventilation through the unidirectional valve. The medical device may be in a suitable form having a pneumatic circuit, for example an anaesthetic machine, a breathing machine or the like.

The preferred embodiments of the present application have been described in detail above, but the present application is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in detail.

Moreover, any combination of the various embodiments of the present application may be made without departing from the spirit of the present application, which should also be considered as disclosed herein.

Claims

1. The utility model provides a check valve assembly, its characterized in that, check valve assembly includes supporting shoe (10), diaphragm subassembly (20) and spring (30), supporting shoe (10) include internal passage (11), diaphragm subassembly (20) include diaphragm seat (21) and install in diaphragm (22) of diaphragm seat (21), the first end of diaphragm seat (21) is passed through spring (30) biasing, so that the second end of diaphragm seat (21) can stretch into internal passage (11) and pass through diaphragm (22) seals the port of internal passage (11).

2. A one-way valve assembly according to claim 1, wherein the diaphragm seat (21) comprises a diaphragm mounting portion (212) for mounting the diaphragm (22), an end of the diaphragm mounting portion (212) being provided with a flange (2121), the flange (2121) being provided with a guiding cone cooperating with the inner channel (11).

3. A one-way valve assembly according to claim 2, wherein the diaphragm seat (21) comprises a spring mounting portion (213) for mounting the spring (30), the spring mounting portion (213) comprising a guide (2131) sliding along an inner wall of a bore in which the one-way valve assembly is mounted.

4. A one-way valve assembly according to claim 3, wherein the spring mounting portion (213) comprises at least three of the guides (2131) evenly distributed around the spring (30).

5. A one-way valve assembly according to claim 3, wherein the diaphragm (22) is annular, the spring mounting portion (213) is a ring-like member, the diaphragm mounting portion (212) is cylindrical and coaxially arranged with the spring mounting portion (213), and the radial dimension of the diaphragm mounting portion (212) is smaller than the outer diameter of the spring mounting portion (213) to define an annular groove (211) between the flange (2121) and the spring mounting portion (213) for mounting the diaphragm (22).

6. A one-way valve assembly according to claim 1, wherein the support block (10) comprises a cylindrical body (12) in abutment with the diaphragm assembly (20) and a positioning flange (13) provided at an end of the cylindrical body (12) remote from the diaphragm assembly (20).

7. A one-way valve assembly according to claim 6, characterized in that the outer periphery of the cylindrical body (12) is provided with a mounting groove (121) for mounting a sealing ring (40).

8. A one-way valve comprising the one-way valve assembly of any one of claims 1-7.

9. The one-way valve according to claim 8, characterized in that the one-way valve comprises a valve body (50), the valve body (50) comprising a mounting cavity (51) for mounting the one-way valve assembly and a gas channel (52) communicating with the mounting cavity (51).

10. A medical device comprising the one-way valve of claim 8 or 9.