CN219375798U

CN219375798U - Pressure reducing valve and medical equipment

Info

Publication number: CN219375798U
Application number: CN202223451521.8U
Authority: CN
Inventors: 贠海龙; 张凯
Original assignee: Aeonmed Healthcare Technology Co ltd
Current assignee: Aeonmed Healthcare Technology Co ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-07-21
Anticipated expiration: 2032-12-22

Abstract

The application discloses relief pressure valve and medical equipment, wherein, the relief pressure valve includes casing (10), lower casing (20) and diaphragm subassembly (30), it is provided with the mounting hole that corresponds with lower casing (20) to go up casing (10), diaphragm subassembly (30) include diaphragm seat (31) and install in diaphragm (32) of diaphragm seat (31), diaphragm seat (31) and diaphragm (32) be provided with locating hole (322) that the mounting hole corresponds, go up casing (10) and lower casing (20) through passing the first fastener fixed connection of mounting hole and locating hole. The diaphragm assembly can be positioned relative to the upper and lower shells by a first fastener for fixedly connecting the upper and lower shells, thereby ensuring the positioning of the diaphragm assembly during use and avoiding displacement of the diaphragm assembly under the condition of pressure change of both sides.

Description

Pressure reducing valve and medical equipment

Technical Field

The present application relates to the field of medical devices, and more particularly, to a pressure relief valve and medical device.

Background

Pressure relief valves are an important component of gas pressure control in medical equipment, particularly in medical anesthesia machine equipment and ventilator equipment applications. The function of the pressure reducing valve is to reduce the pressure of the gas from a higher pressure to a lower pressure and to keep the output pressure stable.

At present, in a small-sized pressure reducing valve used in the field of medical equipment, a diaphragm of a diaphragm assembly is fixed on a diaphragm seat through riveting, two sides of the diaphragm seat are respectively abutted against a large spring and a valve core, and the diaphragm is deformed and balanced under the action of pressure at two sides. However, because the whole diaphragm assembly is kept in position by the pressing of the large spring and the valve core, the diaphragm assembly can shift under the condition of pressure change at two sides, namely, the diaphragm assembly is separated from the pressing surface to suspend the diaphragm, so that the diaphragm leaks air, and the pressure reducing valve cannot be normally used.

Therefore, how to ensure the positioning of the diaphragm assembly is a technical problem that needs to be solved by the present application.

Disclosure of Invention

In view of this, the present application proposes a pressure reducing valve to ensure the normal operation of the pressure reducing valve.

The application provides a relief pressure valve, wherein, the relief pressure valve includes casing, lower casing and diaphragm subassembly, it is provided with the mounting hole that corresponds with lower casing to go up the casing, the diaphragm subassembly include the diaphragm seat with install in the diaphragm of diaphragm seat, diaphragm seat and diaphragm be provided with the locating hole that the mounting hole corresponds, go up casing and lower casing through passing the first fastener fixed connection of mounting hole and locating hole.

Optionally, the diaphragm mount and diaphragm are detachably connected by a second fastener.

Optionally, a fastening hole for setting the second fastening piece is arranged at the center of the membrane, and the positioning hole is arranged around the fastening hole.

Optionally, the cross section of the membrane is U-shaped.

Optionally, the relief valve includes adjusting screw and sets up adjusting screw with the first spring between the diaphragm subassembly, adjusting screw is including having the pole portion of external screw thread and setting be in the terminal pressure head portion of pole portion, the top of last casing has the jack, the inner wall of jack be provided with pole portion complex internal screw thread.

Optionally, the first spring comprises a spring body and a gasket arranged at one end of the spring body, and the press head part and the gasket are provided with a centering structure matched with each other.

Optionally, the relief valve includes second spring and valve subassembly, the lower casing includes hollow main part and sets up the fretwork of main part lower extreme admit air portion, the second spring is fixed in admit air portion, the valve subassembly includes and is located the second spring with the case between the diaphragm subassembly, the bottom of main part is provided with the opening, the case includes from the flange portion that the opening stretches out, the opening part is provided with can with the sealing washer of flange portion seal.

Optionally, the valve assembly includes a valve housing sleeved with the valve core, the valve housing is provided with a first air outlet channel, and the lower housing is provided with a second air outlet channel communicated with the first air outlet channel and a pressure feedback channel communicated with the second air outlet channel and extending to the lower part of the diaphragm assembly.

Optionally, the valve core includes a pressing end for contacting with the diaphragm assembly, and the pressing end and the surface of the diaphragm assembly contacting with each other are in spherical fit.

The present application also provides a medical device, wherein the medical device comprises a pressure relief valve of the present application.

According to the technical scheme of this application, the diaphragm subassembly can be through the first fastener that is used for fixed connection upper casing and lower casing for upper casing and lower casing location to ensure the location of diaphragm subassembly in the use, avoid the diaphragm subassembly to shift under the condition of both sides pressure variation.

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 view according to a preferred embodiment of the present application;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a perspective view of the diaphragm of FIG. 2;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a perspective view of the adjusting screw of FIG. 2;

FIG. 6 is a longitudinal cross-sectional view of FIG. 5;

FIG. 7 is a perspective view of the gasket of FIG. 2;

FIG. 8 is a cross-sectional view of FIG. 7;

fig. 9 is a perspective view of the valve cartridge of fig. 2.

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 an aspect of the present application, there is provided a pressure reducing valve, wherein the pressure reducing valve includes an upper case 10, a lower case 20, and a diaphragm assembly 30, the upper case 10 and the lower case 20 are provided with corresponding mounting holes, the diaphragm assembly 30 includes a diaphragm seat 31 and a diaphragm 32 mounted to the diaphragm seat 31, the diaphragm seat 31 and the diaphragm 32 are provided with positioning holes 322 corresponding to the mounting holes, and the upper case 10 and the lower case 20 are fixedly connected by a first fastener P passing through the mounting holes and the positioning holes.

In the pressure reducing valve of the present application, the diaphragm assembly 30 can be positioned with respect to the upper and lower cases 10 and 20 by the first fastening members P for fixedly connecting the upper and lower cases 10 and 20, thereby ensuring the positioning of the diaphragm assembly 30 during use, and preventing the diaphragm assembly 30 from being displaced in the case of a change in pressure of both sides.

In this application, the upper case 10 and the lower case 20 may be made of a suitable material, so as to be fixedly connected by the first fastening member P, for example, a metal piece or a plastic piece.

Wherein the diaphragm seat 31 and the diaphragm 32 may be mounted in a suitable manner, preferably the diaphragm seat 31 and the diaphragm 32 may be detachably connected for maintenance. For example, the diaphragm mount 31 and the diaphragm 32 may be detachably connected by a second fastener 33.

Specifically, the diaphragm seat 31 and the diaphragm 32 may be provided with corresponding fastening holes 321 so as to be fitted with the second fastening member 33. Wherein the fastening hole 321 may be a threaded hole, and the second fastener 33 may be a screw.

Preferably, the membrane 32 may be provided with a balanced positioning by the first fastener. Specifically, the center of the diaphragm 32 is provided with a fastening hole 321 for disposing the second fastening member 33, and the positioning hole 322 is disposed around the fastening hole 321. That is, the first fastening members may be disposed around the second fastening members 33, and more preferably, the first fastening members may be uniformly disposed around the second fastening members 33. In the embodiment shown in fig. 4, the diaphragm 32 is rectangular, and the fastening holes 321 may be disposed at four corners of the diaphragm 32, so as to penetrate the first fastening member to perform a positioning function, and avoid affecting a main working portion in the middle of the diaphragm 32.

In addition, the diaphragm 32 may be configured in a suitable shape to function to deform under the force of both sides. Preferably, the diaphragm 32 may have a U-shaped cross section to reduce the idle travel of the diaphragm 32, which is beneficial for extended service life.

The pressure reducing valve includes an adjusting screw 40 and a first spring 50 disposed between the adjusting screw 40 and the diaphragm assembly 30, and the amount of deformation of the first spring 50 can be adjusted by adjusting the position of the adjusting screw 40 to adjust the pressure reducing effect of the pressure reducing valve. In the prior art, an internal thread is generally provided on the side wall of the portion of the first housing 10 where the first spring 50 is accommodated, and an external thread is provided on the outer peripheral surface of the end portion of the adjusting screw 40 which abuts against the first spring 50, but this requires a large range of internal threads to be machined in the first housing 10, which is difficult to machine. Preferably, as shown in fig. 2, the adjusting screw 40 includes a rod portion 41 having external threads and a press head portion 42 provided at the end of the rod portion 41, the top of the upper housing 10 has a socket, and the inner wall of the socket is provided with internal threads engaged with the rod portion 41. Thereby, the female screw can be easily machined only at the insertion hole of the upper case 10, the machining range being approximately the thickness of the upper case 10, and the machining range being greatly reduced as compared with the side wall of the portion accommodating the first spring 50.

In addition, the first spring 50 includes a spring body 51 and a spacer 52 provided at one end of the spring body 51, and preferably, the head portion 42 and the spacer 52 are provided with centering structures that are engaged with each other, so that the head portion 42 is centered with the expansion and contraction direction of the spring body 51 when being rotationally advanced with the lever portion 41. Wherein the centering structure may take a suitable form for the quick centering engagement of the ram portion 42 with the spacer 52. For example, in the embodiment shown in fig. 5-8, the centering structure may include a V-shaped protrusion 421 on the plunger portion 42 and a V-shaped groove 521 on the spacer 52.

As shown in fig. 2, the pressure reducing valve further includes a second spring 60 and a valve assembly 70, the lower housing 20 includes a hollow main body 21 and a hollow air inlet portion 22 disposed at a lower end of the main body 21, the second spring 60 is fixed to the air inlet portion 22, the valve assembly 70 includes a valve core 71 disposed between the second spring 60 and the diaphragm assembly 30, an opening is disposed at a bottom of the main body 21, the valve core 71 includes a flange portion 711 extending from the opening, and a sealing ring 80 capable of sealing with the flange portion 711 is disposed at the opening.

By the engagement of the flange 711 and the seal ring 80, the inside of the lower case 20 can be sealed when not in use. Since the flange portion 711 can achieve good sealability with the seal ring 80, the valve core 71 does not need to be integrally encapsulated as in the valve core of the prior art, but only needs to be made of rigid metal, simplifying the manufacturing process and reducing the cost. As shown in fig. 2 and 9, the flange 711 may be cylindrical, that is, may be in sealing engagement with the seal ring 80, and it is not necessary to provide a tapered engagement that is easily worn.

In addition, the valve assembly 70 may include a valve housing 72 sleeved with the valve core 71, the valve housing 72 being provided with a first air outlet passage 721, the lower housing 20 being provided with a second air outlet passage 23 communicating with the first air outlet passage 721 and a pressure feedback passage 24 communicating with the second air outlet passage 23 and extending to below the diaphragm assembly 30. Wherein the valve sleeve 72 may be secured within the lower housing 20 in a suitable manner such that the first air outlet passage 721 is always in communication with the second air outlet passage 23. In use, the high pressure gas entering from the opening may flow through the gap between the valve core 71 and the valve sleeve 72 into the first gas outlet passage 721 and then out through the second gas outlet passage 23, completing the depressurization. A portion of the high pressure gas may pass through the pressure feedback passage 24 to below the diaphragm assembly 30 to balance the spring force of the first spring 50 to maintain the diaphragm 32 in a properly deformed state.

As can be appreciated, in the pressure reducing valve of the present application, in use, the top of the valve spool 71 abuts the diaphragm assembly 30; when not in use, the top of the valve core 71 is separated from the diaphragm assembly 30. In order to facilitate the constant abutment of the valve core 71 and the diaphragm assembly 30 during movement and the rapid centering of the diaphragm assembly 30 when it is moved into contact with the valve core 71, it is preferable that the valve core 71 includes an abutment end 712 for contact with the diaphragm assembly 30, and that the surfaces of the abutment end 712 and the diaphragm assembly 30 in contact with each other are in spherical engagement. Thus, during movement, the abutting end 712 and the diaphragm assembly 30, which are in spherical engagement with each other, can always remain in contact and stably transfer force at least one contact point; when the diaphragm assembly 30 moves into contact with the valve body 71, the diaphragm assembly can be quickly brought into contact with at least one contact point by spherical engagement, and the relative position can be automatically adjusted to achieve the self-centering effect.

The operation of the pressure reducing valve of the present application is described below with reference to the drawings.

When not in use, the valve body 71 is pressed upward by the second spring 60, so that the flange portion 711 seals with the seal ring 80.

During debugging, the first spring 50 is compressed by the adjusting screw 40, so that the diaphragm 32 deforms downwards and presses against the valve core 71, so that the valve core 71 moves downwards and is separated from the sealing ring 80, the bottom opening of the lower housing 20 is opened, gas is allowed to enter between the valve core 71 and the valve sleeve 72 from the opening and is discharged from the first gas outlet channel 721 and the second gas outlet channel 23, and a part of the gas reaches below the diaphragm assembly 30 through the pressure feedback channel 24 to balance with the elastic force of the first spring 50, so that the diaphragm 32 is kept in a proper deformation state. By adjusting the compression amount of the first spring 50 by the adjusting screw 40, a desired decompression effect can be obtained.

In use, high pressure gas enters between the valve core 71 and the valve sleeve 72 from the opening and is exhausted through the first and second outlet passages 721 and 23, and a portion of the high pressure gas passes through the pressure feedback passage 24 to below the diaphragm assembly 30 to balance the spring force of the first spring 50, maintaining the diaphragm 32 in the current deformed state.

According to another aspect of the present application, a medical device is provided, wherein the medical device comprises a pressure relief valve of the present application.

The pressure reducing valve is compact in structure and can be installed at a proper position in medical equipment in a plugging mode.

The medical device of the present application may be in a suitable form with a pressure relief valve, for example may be an anesthesia machine or a breathing machine.

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 relief pressure valve, its characterized in that, relief pressure valve includes casing (10), lower casing (20) and diaphragm subassembly (30), it is provided with the mounting hole that corresponds to go up casing (10) and lower casing (20), diaphragm subassembly (30) include diaphragm seat (31) and install in diaphragm (32) of diaphragm seat (31), diaphragm seat (31) and diaphragm (32) are provided with locating hole (322) that the mounting hole corresponds, go up casing (10) and lower casing (20) through passing the first fastener fixed connection of mounting hole and locating hole.

2. Pressure reducing valve according to claim 1, characterized in that the diaphragm seat (31) and the diaphragm (32) are detachably connected by means of a second fastening piece (33).

3. Pressure reducing valve according to claim 2, characterized in that the centre of the diaphragm (32) is provided with a fastening hole (321) for arranging the second fastening piece (33), the positioning hole (322) being arranged around the fastening hole (321).

4. Pressure reducing valve according to claim 1, characterized in that the membrane (32) is U-shaped in cross section.

5. Pressure reducing valve according to claim 1, characterized in that it comprises an adjusting screw (40) and a first spring (50) arranged between the adjusting screw (40) and the diaphragm assembly (30), the adjusting screw (40) comprising a stem (41) with an external thread and a ram (42) arranged at the end of the stem (41), the top of the upper housing (10) having a socket, the inner wall of which is provided with an internal thread cooperating with the stem (41).

6. Pressure reducing valve according to claim 5, characterized in that the first spring (50) comprises a spring body (51) and a spacer (52) arranged at one end of the spring body (51), the ram part (42) and the spacer (52) being provided with centering structures cooperating with each other.

7. Pressure reducing valve according to any one of claims 1-6, characterized in that the pressure reducing valve comprises a second spring (60) and a valve assembly (70), the lower housing (20) comprises a hollow body (21) and a hollowed out air inlet part (22) arranged at the lower end of the body (21), the second spring (60) is fixed to the air inlet part (22), the valve assembly (70) comprises a valve core (71) arranged between the second spring (60) and the diaphragm assembly (30), the bottom of the body (21) is provided with an opening, the valve core (71) comprises a flange part (711) protruding from the opening, and a sealing ring (80) capable of sealing with the flange part (711) is arranged at the opening.

8. The pressure reducing valve according to claim 7, wherein the valve assembly (70) comprises a valve housing (72) sleeved with the valve core (71), the valve housing (72) being provided with a first air outlet channel (721), the lower housing (20) being provided with a second air outlet channel (23) communicating with the first air outlet channel (721) and a pressure feedback channel (24) communicating with the second air outlet channel (23) and extending below the diaphragm assembly (30).

9. The pressure relief valve of claim 7, wherein the spool (71) includes a pressing end (712) for contacting the diaphragm assembly (30), the pressing end (712) and the surface of the diaphragm assembly (30) contacting each other being spherically matched.

10. A medical device comprising the pressure relief valve of any one of claims 1-9.