Mechanical pressure release valve device applied to breathing machine

Abstract

The utility model provides a mechanical pressure relief valve device applied to a breathing machine, which comprises a valve seat, the valve seat is provided with an air inlet pipeline, an air outlet pipeline, a pressure relief pipeline and a pressure relief cavity, a valve body is arranged in the valve seat, the valve body is hollow, the pressure relief pipeline is communicated with the pressure relief cavity, and the pressure relief cavity is communicated with the air outlet pipeline. One end of the valve body is communicated with the air inlet pipeline and the air outlet pipeline, the other end of the valve body is located in the pressure relief cavity, a telescopic assembly is arranged in the pressure relief cavity and connected with a valve block, and the valve block abuts against the valve body so that the valve block can be connected with the valve body in a sealed mode. According to the mechanical pressure release valve, the functions of opening and closing the valve are achieved through the telescopic assembly, hard sealing between the valve plate and the valve body is achieved through abutting connection of the valve plate and the valve body, and the situation that the mechanical pressure release valve cannot be opened in time and a patient is injured due to the adhesion and aging phenomena of soft materials such as a diaphragm can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a mechanical pressure relief valve device applied to a ventilator. Background Art

[0002] The pressure relief valve has a safety protection function. During the operation of the ventilator, when the output pressure is greater than the upper limit of the preset pressure, the pressure relief valve can actively relieve the pressure to prevent damage to the patient caused by excessive pressure. As the most important protection measure of the ventilator, the reliability of the pressure relief valve is related to the safety of the patient. Therefore, the stability of the performance of the pressure relief valve is crucial.

[0003] Most of the mechanical pressure relief valves of the existing ventilators adopt soft seals. For example, a silica gel diaphragm is used to contact and seal the valve port. There are potential safety hazards in this. During long-term use, the silica gel diaphragm may adhere to the valve port due to aging. At this time, it is difficult to open the pressure relief valve, and the pressure of the ventilator cannot be relieved in time, which is extremely likely to cause damage to the patient's body.

[0004] Therefore, the existing technology needs to be improved. Summary of the Utility Model

[0005] In view of the deficiencies of the above-mentioned existing technology, the utility model provides a mechanical pressure relief valve device applied to a ventilator. The device adopts a hard seal, which can effectively avoid the adhesion and aging of soft materials such as diaphragms, resulting in the mechanical pressure relief valve being unable to open in time and causing damage to the patient.

[0006] In order to achieve the above object, the utility model adopts the following technical solutions:

[0007] A mechanical pressure relief valve device applied to a ventilator includes a valve seat. The valve seat is provided with an air inlet pipe, an air outlet pipe, a pressure relief pipe and a pressure relief cavity. A valve body is arranged in the valve seat. The valve body is hollow. The pressure relief pipe is communicated with the pressure relief cavity. One end of the valve body is respectively communicated with the air inlet pipe and the air outlet pipe. The other end of the valve body is located in the pressure relief cavity, and a telescopic component is arranged in the pressure relief cavity. The telescopic component is connected with a valve plate, and the valve plate abuts against the valve body, so that the valve plate and the valve body are hermetically connected.

[0008] Further, the valve body is rotatably fixed to the valve seat, and a mirror seal is adopted between the valve body and the valve plate.

[0009] Further, the valve body is provided with a concave ring, a sealing ring is arranged in the concave ring, and the valve body is hermetically connected with the valve seat through the sealing ring.

[0010] Further, the telescopic assembly includes an upper cover and an elastic member. The upper cover is threadedly connected to the valve seat. One end of the elastic member is fixed to the upper cover, and the other end of the elastic member is fixed to the valve plate.

[0011] Further, the upper cover is provided with a screwing hole for facilitating the screwing of the upper cover.

[0012] Further, the elastic member is a spring. The upper cover is provided with a first protrusion, and the valve plate is provided with a second protrusion. One end of the elastic member is sleeved on the first protrusion, and the other end of the elastic member is sleeved on the second protrusion.

[0013] Further, the valve plate is provided with a first contact surface, the valve body is provided with a convex ring, and the convex ring is provided with a second contact surface. The first contact surface is in sealing contact with the second contact surface.

[0014] Further, the convex ring is provided with an inclined chamfer.

[0015] Further, the valve body and the valve plate are made of aluminum alloy material.

[0016] Further, the pressure relief cavity is a columnar cavity, the valve plate is a circular valve plate, and the diameter of the valve plate is the same as the diameter of the pressure relief cavity.

[0017] Compared with the prior art, the mechanical pressure relief valve device applied to a ventilator provided by the present utility model includes a valve seat. The valve seat is provided with an air inlet pipe, an air outlet pipe, a pressure relief pipe, and a pressure relief cavity. A valve body is arranged in the valve seat. The valve body is hollow. The pressure relief pipe is communicated with the pressure relief cavity. One end of the valve body is respectively communicated with the air inlet pipe and the air outlet pipe. The other end of the valve body is located in the pressure relief cavity, and a telescopic assembly is arranged in the pressure relief cavity. The telescopic assembly is connected with a valve plate, and the valve plate abuts against the valve body, so that a sealing connection is formed between the valve plate and the valve body. For the present utility model, the opening and closing of the valve are realized through the telescopic assembly, and the hard seal between the valve plate and the valve body is realized by the abutment of the valve plate and the valve body, which can effectively avoid the adhesion and aging of soft materials such as diaphragms, resulting in the mechanical pressure relief valve being unable to be opened in time and causing damage to patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0019] Figure 1 Schematic structural diagram of the mechanical pressure relief valve device applied to a ventilator provided by the present utility model.

[0020] Figure 2 Schematic cross-sectional view of the mechanical pressure relief valve device applied to a ventilator provided by the present utility model.

[0021] Figure 3 is Figure 2 Enlarged schematic view at position A in

[0022] Explanation of the attached drawing reference numerals:

[0023] Valve seat - 1, intake pipe - 2, outlet pipe - 3, pressure relief pipe - 4, pressure relief cavity - 5, valve body - 6, telescopic assembly - 7, valve disc - 8, concave ring - 9, sealing ring - 10, upper cover - 11, elastic member - 12, screw hole - 13, first protrusion - 14, second protrusion - 15, first contact surface - 16, second contact surface - 17, convex ring - 18, chamfer - 19. Detailed implementation manners

[0024] For the convenience of understanding the present application, the present application will be described more comprehensively below with reference to the relevant attached drawings. Embodiments of the present application are shown in the attached drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of the present application in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0026] In the present utility model, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the attached drawings. These terms are mainly used to better describe the present utility model and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation or be constructed and operated in a specific orientation. And, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present utility model can be understood according to specific circumstances.

[0027] In addition, the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. When used herein, the singular forms "a", "an", and "the" may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that terms such as "comprising" or "having" specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0028] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0029] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0030] As Figure 1 、 Figure 2 and Figure 3 shown, the mechanical pressure relief valve device applied to a ventilator provided by this utility model includes a valve seat 1. The valve seat 1 is provided with an intake pipe 2, an outlet pipe 3, a pressure relief pipe 4, and a pressure relief chamber 5. A valve body 6 is arranged inside the valve seat 1. The valve body 6 is hollow. The pressure relief pipe 4 is communicated with the pressure relief chamber 5. One end of the valve body 6 is respectively communicated with the intake pipe 2 and the outlet pipe 3. The other end of the valve body 6 is located in the pressure relief chamber 5. And a telescopic assembly 7 is arranged in the pressure relief chamber 5. The telescopic assembly 7 is connected with a valve plate 8. The valve plate 8 abuts against the valve body 6, so that the valve plate 8 and the valve body 6 are hermetically connected.

[0031] It can be understood that the intake pipe 2 is used to connect to a gas supply device, and the outlet pipe 3 is used for a patient to breathe. When the air pressure in the outlet pipe 3 is within a normal preset pressure value, the valve plate 8 can be kept in contact with the valve body 6 under the action of the telescopic assembly 7, that is, it can be kept in sealed connection with the valve body 6. When the air pressure in the outlet pipe 3 is greater than the preset pressure value, the air pressure will lift the valve plate 8, so that the intake pipe 2 is communicated with the pressure relief chamber 5, that is, part of the gas is discharged from the pressure relief pipe 4 through the pressure relief chamber 5.

[0032] Compared with the prior art, in the technical solution of the present utility model, the telescopic assembly 7 is used to realize the functions of opening and closing the valve, and the hard seal between the valve plate 8 and the valve body 6 is realized by the contact between the valve plate 8 and the valve body 6, which can effectively avoid the adhesion and aging of soft materials such as diaphragms, resulting in the mechanical pressure relief valve being unable to open in time and causing damage to patients.

[0033] Further, the valve body 6 is rotatably fixed to the valve seat 1, and a mirror seal is adopted between the valve body 6 and the valve plate 8. It can be understood that the sealing form between the valve plate 8 and the valve body 6 is a mirror seal, which has high reliability, stable pressure control, and is safe and effective.

[0034] Further, the valve body 6 is provided with a concave ring 9, and a sealing ring 10 is arranged in the concave ring 9. The valve body 6 is hermetically connected to the valve seat 1 through the sealing ring 10. It can be understood that the valve body 6 is hermetically connected to the valve seat 1 through the sealing ring 10, which can prevent the gas in the intake pipe 2 from leaking into the pressure relief chamber 5.

[0035] Further, the telescopic assembly 7 includes an upper cover 11 and an elastic member 12. The upper cover 11 is threadedly connected to the valve seat 1. One end of the elastic member 12 is fixed to the upper cover 11, and the other end of the elastic member 12 is fixed to the valve plate 8.

[0036] It should be noted that the valve plate 8 can be pressed against the valve body 6 through the elastic member 12, and the upper cover 11 and the valve seat 1 can adjust the pressing force between the valve plate 8 and the valve body 6 by rotating the thread, that is, the preset pressure value of the elastic member 12 can be adjusted.

[0037] Further, the upper cover 11 is provided with a rotation hole 13 for facilitating the screwing of the upper cover 11. It can be understood that when adjusting the preset pressure value, the upper cover 11 can be screwed by using an auxiliary tool to clamp the rotation hole 13, so that the upper cover 11 can be easily rotated to achieve the effect of adjusting the preset pressure value.

[0038] Further, the elastic member 12 is a spring. The upper cover 11 is provided with a first protrusion 14, and the valve plate 8 is provided with a second protrusion 15. One end of the elastic member 12 is sleeved on the first protrusion 14, and the other end of the elastic member 12 is sleeved on the second protrusion 15. The spring can be fixed on the upper cover 11 and the valve plate 8 respectively through the first protrusion 14 and the second protrusion 15.

[0039] Further, the valve plate 8 is provided with a first contact surface 16, the valve body 6 is provided with a convex ring 18, and the convex ring 18 is provided with a second contact surface 17. The first contact surface 16 is in sealing contact with the second contact surface 17. It should be noted that the surfaces of the first contact surface 16 and the second contact surface 17 are smooth. When the first contact surface 16 comes into contact with the second contact surface 17, a hard seal can be achieved between the valve plate 8 and the valve body 6.

[0040] Further, the convex ring 18 is provided with an inclined chamfer 19. It can be understood that when the contact area between the first contact surface 16 and the second contact surface 17 is too large, due to the relatively smooth surfaces of the first contact surface 16 and the second contact surface 17, it is easy to cause a certain adsorption force between the first contact surface 16 and the second contact surface 17. That is, the inclined chamfer 19 can reduce the contact area between the first contact surface 16 and the second contact surface 17 to a certain extent, and can prevent the adsorption force between the first contact surface 16 and the second contact surface 17 from being too large, resulting in difficulty in separating the valve plate 8 from the valve body 6.

[0041] Further, the valve body 6 and the valve plate 8 are made of aluminum alloy material, which has high strength and can resist the continuous collision between the valve body 6 and the valve plate 8 during valve opening and closing, effectively ensuring the service life of the valve body 6 and the valve plate 8.

[0042] Further, the pressure relief chamber 5 is a columnar chamber, the valve plate 8 is a circular valve plate 8, and the diameter of the valve plate 8 is the same as the diameter of the pressure relief chamber 5. That is, during the valve opening process, the pressure relief chamber 5 can serve as a track for the valve plate 8 to slide, ensuring that the valve plate 8 can be pressed against the second contact surface 17 of the convex ring.

[0043] In summary, for the mechanical pressure relief valve device applied to a ventilator provided by the present utility model, the sealing form between the valve disc and the valve body is mirror surface sealing, which has high reliability, stable pressure control, and is safe and effective. The valve body is hermetically connected to the valve seat through the sealing ring, which can prevent the gas in the intake pipeline from leaking into the pressure relief chamber. The upper cover is threadedly connected to the valve seat, which can adjust the preset pressure value on the elastic member. The chamfer can reduce the contact area between the first contact surface and the second contact surface to a certain extent, and can prevent the adsorption force between the first contact surface and the second contact surface from being too large, resulting in difficulty in separating the valve disc from the valve body. For the present utility model, in the technical solution of the present utility model, the opening and closing of the valve are realized through the telescopic assembly, and the hard seal between the valve disc and the valve body is realized by the valve disc abutting against the valve body, which can effectively avoid the adhesion and aging of soft materials such as diaphragms, resulting in the mechanical pressure relief valve being unable to open in time and causing damage to patients.

[0044] The embodiments of the present utility model have been described above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present utility model, those of ordinary skill in the art can also make many forms without departing from the purpose of the present utility model and the scope protected by the claims. All of these are within the protection scope of the present utility model.

Claims

1. A mechanical pressure relief valve device applied to a ventilator, characterized in that, It includes a valve seat (1), and the valve seat (1) is provided with an air inlet pipe (2), an air outlet pipe (3), a pressure relief pipe (4) and a pressure relief cavity (5). A valve body (6) is arranged inside the valve seat (1). The valve body (6) is hollow. The pressure relief pipe (4) communicates with the pressure relief cavity (5). One end of the valve body (6) communicates with the air inlet pipe (2) and the air outlet pipe (3) respectively. The other end of the valve body (6) is located in the pressure relief cavity (5), and a telescopic assembly (7) is arranged in the pressure relief cavity (5). The telescopic assembly (7) is connected with a valve disc (8), and the valve disc (8) abuts against the valve body (6) to make a sealed connection between the valve disc (8) and the valve body (6).

2. The mechanical pressure relief valve device applied to a ventilator according to claim 1, wherein The valve body (6) is rotationally fixed to the valve seat (1), and a mirror seal is adopted between the valve body (6) and the valve disc (8).

3. The mechanical pressure relief valve device applied to a ventilator according to claim 1, characterized in that, The valve body (6) is provided with a concave ring (9), and a sealing ring (10) is arranged inside the concave ring (9). The valve body (6) is hermetically connected to the valve seat (1) through the sealing ring (10).

4. The mechanical pressure relief valve device applied to a ventilator according to claim 1, characterized in that, The telescopic assembly (7) includes an upper cover (11) and an elastic member (12). The upper cover (11) is threadedly connected to the valve seat (1). One end of the elastic member (12) is fixed to the upper cover (11), and the other end of the elastic member (12) is fixed to the valve disc (8).

5. The mechanical pressure relief valve device applied to a ventilator according to claim 4, wherein, The upper cover (11) is provided with a screwing hole (13) for facilitating the screwing of the upper cover (11).

6. The mechanical pressure relief valve device applied to a ventilator according to claim 4, characterized in that, The elastic member (12) is a spring. The upper cover (11) is provided with a first protrusion (14), and the valve disc (8) is provided with a second protrusion (15). One end of the elastic member (12) is sleeved on the first protrusion (14), and the other end of the elastic member (12) is sleeved on the second protrusion (15).

7. The mechanical pressure relief valve device applied to a ventilator according to claim 1, wherein, The valve disc (8) is provided with a first contact surface (16), the valve body (6) is provided with a convex ring (18), and a second contact surface (17) is arranged on the convex ring (18). The first contact surface (16) is in sealed contact with the second contact surface (17).

8. The mechanical pressure relief valve device applied to a ventilator according to claim 7, characterized in that, The convex ring (18) is provided with an inclined chamfer (19).

9. The mechanical pressure relief valve device applied to a ventilator according to claim 1, characterized in that, The valve body (6) and the valve disc (8) are made of aluminum alloy material.

10. The mechanical pressure relief valve device applied to a ventilator according to claim 1, characterized in that, The pressure relief cavity (5) is a columnar cavity, the valve disc (8) is a circular valve disc, and the diameter of the valve disc (8) is the same as the diameter of the pressure relief cavity (5).

Images