Expiratory valve

Abstract

The utility model discloses an exhalation valve. The exhalation valve comprises a valve body, a valve disc, a spring, a sealing gasket and a limiting assembly. The valve body is provided with a cavity, a connecting cavity and a movement channel, and the radius of the cavity is larger than that of the connecting cavity. The radius of the movement channel is matched with the radius of the valve disc, and the valve disc can move in the movement channel. A slope groove is formed in one side, close to the connecting cavity, of the moving channel; the valve disc comprises a main body structure, the periphery of the main body structure is a conical surface, vent grooves are evenly formed in the periphery, an arc-shaped protrusion is formed between every two vent grooves, and a sealing groove is formed in the other side of the main body structure. A sealing gasket is arranged in the sealing groove. The air exhauster is simple in structure, few in parts, easy to maintain and easy to manufacture, and air can be exhausted without large force during exhalation; the sealing gasket, the spring and other elements are adopted to ensure the sealing performance and stability of the air channel, and safety and reliability are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical device parts, and specifically relates to an exhalation valve. Background Art

[0002] Exhalation valves are commonly used in equipment such as ventilators and emergency breathing bags to ensure that during the exhalation process, the gas can be smoothly discharged from the patient's body without flowing back into the equipment or causing other unnecessary interference.

[0003] The exhalation valve has the following three main functions in medical equipment. The first is to ensure smooth exhalation: during the exhalation process, the exhalation valve opens to allow the patient's exhaled gas to be discharged smoothly and keep the respiratory tract unobstructed. The second is to prevent gas backflow: the design of the exhalation valve enables it to prevent gas from flowing back into the patient's respiratory tract from the outside or inside the device, thereby protecting the patient from potential harmful gases or pollutants. The third is to maintain the pressure difference: in equipment such as ventilators, the exhalation valve works in conjunction with the inhalation valve to control the flow direction and speed of the gas to maintain the pressure difference between the inside and outside of the respiratory tract to achieve effective ventilation and respiratory support.

[0004] Although the exhalation valve plays an important role in medical equipment, the exhalation valve in the prior art still has some shortcomings. Due to the complex structural characteristics of the exhalation valve, a certain resistance will be generated when the gas passes through, which may affect the smoothness of the patient's breathing and the ventilation efficiency of the equipment. As one of the key components of medical equipment, the exhalation valve needs to be cleaned, disinfected and maintained regularly to ensure its normal operation and extend its service life. However, the complex structure of the exhalation valve will increase the maintenance cost and operation complexity of the equipment. Utility Model Content

[0005] The utility model aims at the above problems, makes up for the deficiencies of the prior art, and provides an exhalation valve, including a valve body, a valve disc, a valve needle, a spring, a sealing pad, and a limit assembly;

[0006] The valve body is provided with a cavity, a connecting cavity and a moving channel inside, the radius of the cavity is larger than the radius of the connecting cavity; the radius of the moving channel matches the radius of the valve disc, and the radius of the moving channel is slightly larger than the radius of the valve disc, so that the valve disc can move in the moving channel; a bevel groove is provided on one side of the moving channel close to the connecting cavity;

[0007] The valve disc comprises a main body structure, the outer periphery of the main body structure is a conical surface, ventilation grooves are evenly arranged on the outer periphery, an arc-shaped protrusion is formed between every two ventilation grooves, a truncated cone is arranged on one side of the main body structure, a threaded hole is arranged in the truncated cone, and a sealing groove is arranged on the other side of the main body structure; a sealing gasket is arranged in the sealing groove;

[0008] The length of the valve needle is greater than the length of the motion channel, one end of the valve needle is threadedly connected to the threaded hole, and the other end of the valve needle is connected to the hook;

[0009] The valve disc is arranged in the movement channel, the spring sleeve is arranged outside the round table and the valve needle, one end of the spring presses against the main structure of the valve disc, and the other end of the spring presses against the limit assembly.

[0010] Preferably, an annular flange and an annular groove are arranged outside the valve body.

[0011] Preferably, the limiting assembly includes a retaining spring and a spring stop cover, the retaining spring is clamped on the inner wall of the motion channel, and the spring stop cover is pressed against one side of the retaining spring.

[0012] Preferably, the spring stop cover is provided with a through hole.

[0013] Preferably, the shape of the interior of the bevel groove matches the shape of the exterior of the arc-shaped protrusion.

[0014] Preferably, the valve disc is integrally formed.

[0015] Beneficial effects of the utility model:

[0016] 1. Simple structure: The utility model has a reasonable structural design, few parts, simple assembly, easy maintenance, easy manufacturing, and low manufacturing cost. Due to the simple structure, it does not require much force to expel the exhaled gas when exhaling.

[0017] 2. Safe and reliable: The use of components such as sealing pads and springs ensures the sealing and stability of the airway, improving the safety and reliability of the applied device.

[0018] 3. Wide application: It can be widely used in medical treatment, plateau operations, aerospace and other fields, and has broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the structural schematic diagrams of an exhalation valve of the utility model.

[0020] Figure 2 This is the second structural schematic diagram of an exhalation valve of the utility model.

[0021] Figure 3 This is one of the structural schematic diagrams of a valve disc in an exhalation valve of the utility model.

[0022] Figure 4 This is the second structural schematic diagram of a valve disc in an exhalation valve of the utility model.

[0023] Markings in the figure: 1 is the retaining ring, 2 is the valve needle, 3 is the spring cover, 4 is the spring, 5 is the valve disc, 6 is the sealing gasket, and 7 is the valve body.

[0024] 501 is a threaded hole, 502 is a truncated cone, 503 is a main structure, 504 is an arc-shaped protrusion, 505 is a ventilation groove, and 506 is a sealing groove.

[0025] 701 is a cavity, 702 is an annular flange, 703 is an annular groove, 704 is an inclined groove, 705 is a movement channel, and 706 is a connecting cavity. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.

[0027] Combination Figure 1 , Figure 2 As shown, the utility model is an exhalation valve, comprising a valve body 7, a valve disc 5, a valve needle 2, a spring 4, a sealing gasket 6, and a limit assembly.

[0028] from Figure 1 As can be seen in the figure, the interior of the valve body 7 is provided with a cavity 701, a connecting cavity 706 and a motion channel 705, the radius of the cavity 701 is larger than the radius of the connecting cavity 706, and the radius of the connecting cavity 706 is smaller than the radius of the motion channel 705; the connecting cavity 706 connects the cavity 701 and the motion channel 705, so that the cavity 701 and the motion channel 705 are interconnected; the radius of the motion channel 705 matches the radius of the valve disc 5, and the valve disc 5 can move in the motion channel 705; a bevel groove 704 is provided on one side of the motion channel 705 close to the connecting cavity 706. When the valve disc 5 moves, the arc-shaped protrusion 504 can enter the space of the bevel groove 704 to open the airway and allow the exhaled gas to pass through.

[0029] An internal thread is arranged at one end of the cavity 701 away from the connecting cavity 706, and the cavity 701 is connected to a vacuum pump. When used in conjunction with the vacuum pump, the effect is better.

[0030] like Figure 3 , Figure 4 As shown, the valve disc 5 includes a main structure 503, the outer periphery of the main structure 503 is a conical surface, and ventilation grooves 505 are evenly opened on the outer periphery, and an arc-shaped protrusion 504 is formed between every two ventilation grooves 505. A frustum 502 is arranged on one side of the main structure 503, and a threaded hole 501 is arranged in the frustum 502. A sealing groove 506 is arranged on the other side of the main structure 503; a sealing gasket 6 is arranged in the sealing groove 506; the sealing gasket 6 is annular, and the outer diameter of the sealing gasket 6 is larger than the inner diameter of the connecting cavity 706, and the inner diameter of the sealing gasket 6 is smaller than the inner diameter of the connecting cavity 706.

[0031] The length of the valve needle 2 is greater than the length of the movement channel 705 , and one end of the valve needle 2 is threadedly connected to the threaded hole 501 .

[0032] The valve disc 5 is arranged in the movement channel 705, and the spring 4 is sleeved on the outside of the round table 502 and the valve needle 2. One end of the spring 4 presses against the main structure 503 of the valve disc 5, and the other end of the spring 4 presses against the limit assembly.

[0033] Specifically, an annular flange 702 and an annular groove 703 are provided on the outside of the valve body 7. The annular groove 703 is a cutter back groove, which is provided for the convenience of processing. The annular flange 702 is provided for the convenience of installation.

[0034] Specifically, the limit assembly includes a clamping spring 1 and a spring cover 3, wherein the clamping spring 1 is clamped on the inner wall of the motion channel 705, and the spring cover 3 is pressed against one side of the clamping spring 1. A clamping spring groove is provided inside the motion channel 705, and the clamping spring 1 is installed in the clamping spring groove, so that the clamping spring 1 can be clamped on the inner wall of the motion channel 705.

[0035] Specifically, the shape of the inside of the bevel groove 704 matches the shape of the outside of the arc-shaped protrusion 504 .

[0036] Specifically, the spring stop cover 3 is provided with a through hole, so that the valve needle 2 can move in the through hole of the spring stop cover 3 .

[0037] Specifically, the valve disc 5 is integrally formed.

[0038] During installation, place the valve disc 5 in the movement channel 705, thread one end of the valve needle 2 into the threaded hole 501 on the valve disc 5, then sleeve the spring 4 over the round table 502 on the valve disc 5 and the outside of the valve needle 2, insert the spring stop cover 3 to compress the spring 4, and then fix the spring stop cover 3 with the retaining spring 1. The spring stop cover 3 is used to compress the spring 4, and the retaining spring 1 is used for the final limit.

[0039] The working process of this utility model:

[0040] When the utility model is installed on the exhalation end of a ventilator or other equipment, an oxygen therapy person will exert an upward force on one end of the valve needle 2 when exhaling, so that one end of the valve needle 2 moves upward, and the valve needle 2 drives the valve disc 5 to tilt, thereby opening the airway, and oxygen enters from the movement channel 705, and enters the middle cavity 706 and the cavity 701 from the lower part of the valve disc 5. In this way, the gas exhaled by the oxygen therapy person will pass through the cavity 701, and then rise through the valve disc 5, and the channel generated at the lower part of the valve disc 5 will absorb the gas of the retaining spring 1 and the spring stop cover 3, completing the exhalation work.

[0041] When the oxygen therapy personnel inhale, the valve disc 5 will return to its initial position due to the action of the spring 4, and the sealing gasket 6 will seal the middle channel. At this time, the negative pressure on the left side will not be able to absorb the gas on the right side.

[0042] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the embodiments of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.

Claims

1. An exhalation valve, characterized in that: It comprises a valve body (7), a valve needle (2), a valve disc (5), a spring (4), a sealing gasket (6), and a limit assembly; The valve body (7) is provided with a cavity (701), a connecting cavity (706) and a moving channel (705) inside, the radius of the cavity (701) being greater than the radius of the connecting cavity (706); the radius of the moving channel (705) matches the radius of the valve disc (5), and the valve disc (5) can move in the moving channel (705); a sloped groove (704) is provided on one side of the moving channel (705) close to the connecting cavity (706); The valve disc (5) comprises a main body structure (503), the outer periphery of the main body structure (503) is a conical surface, ventilation grooves (505) are evenly arranged on the outer periphery, and an arc-shaped protrusion (504) is formed between every two ventilation grooves (505); a truncated cone (502) is arranged on one side of the main body structure (503), a threaded hole (501) is arranged in the truncated cone (502), and a sealing groove (506) is arranged on the other side of the main body structure (503); a sealing gasket (6) is arranged in the sealing groove (506); The length of the valve needle (2) is greater than the length of the motion channel (705), and one end of the valve needle (2) is threadedly connected to the threaded hole (501); The valve disc (5) is arranged in the movement channel (705), and the spring (4) is sleeved on the outside of the round table (502) and the valve needle (2). One end of the spring (4) is pressed against the main structure (503) of the valve disc (5), and the other end of the spring (4) is pressed against the limit assembly.

2. An exhalation valve according to claim 1, characterized in that: An annular flange (702) and an annular groove (703) are arranged outside the valve body (7).

3. An exhalation valve according to claim 1, characterized in that: The limiting assembly comprises a retaining spring (1) and a spring stop cover (3), wherein the retaining spring (1) is retained on the inner wall of the movement channel (705), and the spring stop cover (3) is pressed against one side of the retaining spring (1).

4. An exhalation valve according to claim 3, characterized in that: The spring stop cover (3) is provided with a through hole.

5. An exhalation valve according to claim 1, characterized in that: The shape of the interior of the inclined groove (704) matches the shape of the exterior of the arc-shaped protrusion (504).

6. An exhalation valve according to claim 1, characterized in that: The valve disc (5) is integrally formed.

Images