CN209827906U

CN209827906U - Expiratory valve

Info

Publication number: CN209827906U
Application number: CN201920550849.4U
Authority: CN
Inventors: 张卫明; 白海波; 彭冬雨
Original assignee: Moxin Beijing Science And Technology Development Co Ltd
Current assignee: Moxin Beijing Science And Technology Development Co Ltd
Priority date: 2019-04-22
Filing date: 2019-04-22
Publication date: 2019-12-24
Anticipated expiration: 2029-04-22

Abstract

The utility model relates to a valve field provides an expiratory valve, include: the valve seat (1) is provided with a valve seat main body (10), a first chamber (11) is arranged in the valve seat main body (10), a first pipeline (14) and a second pipeline (15) are connected to two sides of the valve seat main body (10), and an exhalation port (4) is arranged at the upper end of the valve seat main body (10); an expiratory membrane (3), said expiratory membrane (3) being arranged above said expiratory opening (4) and being capable of sealing said expiratory opening (4); the valve cover (2) is arranged on the expiration membrane (3), and a third chamber (31) is formed on the valve cover (2) and the inner side of the expiration membrane (3); wherein the first line (14) has a vent pipe (17) through which vent pipe (17) communicates with the third chamber (31). The utility model provides a new expiratory valve structure has saved the hose of the respirator control peep among the current expiratory valve, has realized the control to peep equally.

Description

Expiratory valve

Technical Field

The utility model relates to a valve, more specifically relates to an expiratory valve that cooperation breathing machine used.

Background

The exhalation valve is an important component of a breathing circuit of a respirator, and mainly has the main function of completing a breathing action in cooperation with the respirator, closing the inhalation phase and exhausting the exhaled air of a patient in the exhalation phase while maintaining Positive End Expiratory Pressure (PEEP). When the airway pressure is higher than PEEP, the exhalation valve cannot be opened until the pressure drops to the PEEP value; when the airway pressure is below PEEP, exhalation is turned off, maintaining PEEP. In the clinic, a doctor will set PEEP values according to different physiological characteristics of a patient. Ensuring that the patient can breathe out the gas comfortably and freely. The pressure sampling points are arranged on the expiratory valve and used for collecting the inspiratory pressure and the expiratory pressure of the patient.

The existing expiratory valve has the following defects:

1. the existing expiratory valve control PEEP mainly adopts two modes of electric control and pneumatic control, and the electric control mode has a more complex structure; the air control mode needs to connect a hose with the same length as the breathing circuit between the breathing machine and the expiratory valve, and transmits the control pressure of the breathing machine to the expiratory valve, so that the breathing circuit is complicated;

2. in order to prevent the patient's exhalation from returning to the breathing circuit, a one-way valve is provided internally on the exhalation to prevent backflow of gas.

SUMMERY OF THE UTILITY MODEL

To the problem in the background art, the utility model provides an expiratory valve, include:

the valve seat is provided with a valve seat main body, a first chamber is arranged in the valve seat main body, a first pipeline and a second pipeline are connected to two sides of the valve seat main body, and an exhalation port is formed in the upper end of the valve seat main body;

an exhalation diaphragm disposed over the exhalation port and capable of sealing the exhalation port;

the valve cover is arranged on the expiration membrane, and a third chamber is formed by the valve cover and the inner side of the expiration membrane;

wherein the first pipeline is provided with a vent pipe which is communicated with the third chamber.

Further, a valve cover groove is formed in the cover bottom of the valve cover and communicated with the vent pipe, so that the first pipeline is communicated with the third chamber sequentially through the vent pipe and the valve cover groove.

Further, the valve cover groove is long-strip-shaped, one end of the valve cover groove far away from the center of the valve cover is a circular recess, and the circle is aligned with the pipe opening of the vent pipe.

Further, the exhalation membrane includes a basin-shaped body, a constriction smoothly connected to the basin-shaped body, and a rim extension extending outwardly from the constriction rim.

Further, the edge extension part is provided with an expiration diaphragm round hole, and the pipe opening of the vent pipe, the expiration diaphragm round hole and the circular recess of the valve cover groove are aligned.

Further, an expiratory membrane square ear for positioning projects radially outward from the rim extension.

Further, the valve cover is provided with a plurality of buckles, the valve cover is combined with the valve seat through the buckles, and the plurality of buckles are unequal in length.

Further, a one-way diaphragm is arranged between the first pipeline and the first chamber, and positive air pressure can enter the first chamber from the first pipeline through the one-way diaphragm.

Further, a valve seat grid is arranged between the first pipeline and the first chamber, and the one-way diaphragm is installed on an inner hole of the valve seat grid.

Furthermore, the lower end of the valve seat main body is provided with a pressure detection port for collecting the inspiratory pressure and the expiratory pressure of a patient, the pressure detection port is communicated with the first chamber, and the pressure detection port is connected with a pressure collection port of a breathing machine.

The utility model has the advantages that: a new expiratory valve structure is provided, a hose for controlling the peep of a respirator in the existing expiratory valve breathing circuit is omitted, and the peep is controlled. In addition, the one-way diaphragm is added in the expiratory valve, so that the exhaust exhaled by the patient is prevented from reentering the body.

Drawings

Fig. 1 is a perspective view of the exhalation valve of the present invention.

Fig. 2 is a cross-sectional view of the exhalation valve of the present invention.

Figure 3 is a cross-sectional view of the exhalation valve seat of the present invention.

Fig. 4 is a top view of the exhalation valve seat of the present invention.

Figure 5 is a side view of the exhalation valve seat of the present invention.

Figure 6 is a front view of the exhalation diaphragm of the exhalation valve of the present invention.

Figure 7 is a cross-sectional view of the exhalation diaphragm of the exhalation valve of the present invention.

Figure 8 is a front view of the valve cover of the exhalation valve of the present invention.

Reference numerals

The valve seat comprises a valve seat 1, a valve cover 2, an expiratory membrane 3, an expiratory port 4, a one-way membrane 5, a sealing ring 6, a valve seat main body 10, a first chamber 11, a second chamber 12, a valve seat windowing 13, a first pipeline 14, a second pipeline 15, a pressure detection port 16, a breather pipe 17, a valve seat protrusion 18, a valve seat grid 19, a valve cover groove 21, a first valve cover buckle 23, a second valve cover buckle 24, a third valve cover buckle 25, a square lug groove 26, a third chamber 31, an expiratory membrane round hole 32, an expiratory membrane square lug 33 and an expiratory membrane groove 34.

Detailed Description

Embodiments of the present invention will now be described with reference to the drawings, wherein like parts are designated by like reference numerals. The embodiments described below and the technical features of the embodiments may be combined with each other without conflict.

As shown in fig. 1 to 5, the exhalation valve comprises: valve seat 1, valve cover 2 and expiratory diaphragm 3.

The valve seat 1 has a valve seat body 10, a first chamber 11 is provided inside the valve seat body 10, a first pipeline 14 and a second pipeline 15 are connected to both sides of the valve seat body 10, wherein the first chamber 11 is communicated with the second pipeline 15. In use, the first conduit 14 is connected to a breathing circuit of a ventilator and the second conduit 15 is connected to an endotracheal tube of a patient. Thereby communicating with the airway of the patient through the exhalation valve and establishing the air path connection between the patient and the ventilator.

As shown in fig. 2, the valve seat main body 10 has a first chamber 11 therein, the valve seat main body 10 has an exhalation port 4 at an upper end thereof, and the exhalation diaphragm 3 is disposed above the exhalation port 4. The valve cap 2 covers over the expiratory membrane 3, forming a third chamber 31 with the expiratory membrane 3. A vent pipe 17 is provided in the first conduit 14 to communicate with the third chamber 31. When the gas in the first conduit 14 enters the third chamber 31 through the vent tube 17, the gas pressure in the third chamber 31 increases slowly, and when the gas in the third chamber 31 is higher than the gas pressure in the first chamber 11, the exhalation membrane 3 presses downwards to seal the exhalation vent 4. When the pressure in the first chamber 11 increases and the pressure of the gas in the third chamber 31 is lower than the pressure in the first chamber 11, the exhalation diaphragm 3 is pushed open from bottom to top by the gas in the first chamber 11, and the exhalation port 4 is opened.

Preferably, the valve seat body 10 has a pressure detection port 16 at a lower end thereof, the pressure detection port 16 is communicated with the first chamber 11, and the pressure detection port 16 is connected with a pressure collection port of a ventilator for collecting the pressure of inhalation and exhalation of the patient.

Preferably, a one-way diaphragm 5 is arranged between the first pipe 14 and the first chamber 11, and positive air pressure can enter the first chamber 11 from the first pipe 14 through the one-way diaphragm 5 without forming a reverse flow. Preferably, a seat grid 19 is provided between the first duct 14 and the first chamber 11, and the unidirectional diaphragm 5 is mounted on the inner hole of the seat grid 19.

Preferably, the vent pipe 17 is provided on the upper side of the first pipe 14 at a position close to the unidirectional diaphragm 5.

Preferably, referring to fig. 8, a cap recess 21 is formed on the cap bottom of the cap 2, and the cap recess 21 can communicate with the vent pipe 17 to form a gas passage, so that the gas in the first pipeline 14 can enter the third chamber 31. More preferably, the valve cover recess 21 is elongate and has a circular recess at the end remote from the centre of the valve cover, the circular recess being aligned with the vent tube 17 and the expiratory diaphragm circular aperture 32.

Fig. 6 and 7 show the structure of one embodiment of the suction diaphragm 3. The exhalation diaphragm 3 is mounted above the valve seat main body 10, covering the exhalation port 4 of the valve seat main body 10. The exhalation membrane 3 is in an inverted omega shape, and the exhalation membrane 3 includes a basin-shaped main body 35, a constricted portion 36, and a rim extension portion 37. The constriction 36 is smoothly connected to the basin-shaped body 35, and the edge extension 37 extends outwardly from the edge of the constriction 36.

Preferably, the peripheral extension 37 has an exhalation diaphragm circular hole 32, and the exhalation diaphragm circular hole 32 is aligned with the ventilation tube 17 when the inhalation diaphragm 3 is mounted on the valve seat 1. Thus, when the valve cap 2 and the exhalation diaphragm 3 are assembled, the valve cap 2 presses the exhalation diaphragm 3, and the gas from the first pipe 14 enters the third chamber 31 through the vent pipe 17, the exhalation diaphragm circular hole 32 and the valve cap groove 21.

Preferably, at the exhalation diaphragm circular hole 32, an exhalation diaphragm square ear 33 protrudes radially outward from the edge extension 37, the exhalation diaphragm square ear 33 being a positioning and error proofing measure, and the exhalation diaphragm circular hole 32 is naturally aligned with the vent tube 17 of the valve seat 1 by inserting the exhalation diaphragm square ear 33 into the groove 26 inside the valve seat 1 when the exhalation diaphragm 3 is fitted to the valve seat 1. At this point, the bonnet recess 21 is also aligned with the exhalation diaphragm circular aperture 32 and the internal bore 17 of the valve seat 1. In this way, the gas in the first pipeline 14 enters the third chamber 31 through the vent pipe 17, the circular hole 32 of the expiratory diaphragm and the valve cover groove 21.

Preferably, in order to increase the tightness between the valve seat 1 and the expiratory membrane 3, a valve seat protrusion 18 is provided on the plane where the valve seat 1 contacts the expiratory membrane 3, and correspondingly, a groove 34 is provided under the edge extension 37 of the expiratory membrane 3. The valve seat protrusion 18 and the recess 34 have the same diameter, and the valve seat protrusion 18 is fitted into the recess 34 when mounted, thereby preventing gas from leaking from the vent pipe 17 and the circular hole 32 to the second chamber 12.

Preferably, a sealing ring 6 is provided on the outside of the exhalation port 4 of the valve seat 1 to prevent the gas in the first chamber 11 from leaking to the atmosphere.

The working principle of the exhalation valve of the present invention is described below.

When the pressure of the gas in the first chamber 11 is greater than the pressure in the third chamber 31, the gas pushes against the expiratory diaphragm 3, passing from the exhalation port 4 into the second chamber 12 (open to the atmosphere), and when the pressure in the first chamber 11 is less than or equal to the pressure in the third chamber 31, the expiratory diaphragm 3 blocks the venting of the first chamber 11 into the second chamber 12. The second chamber 12 is formed by enclosing the outer surface of the side of the exhalation diaphragm 3 and the inner surface of the valve seat main body 10, and since the valve seat main body 10 is opened with a plurality of valve seat windows 13 corresponding to the side of the exhalation diaphragm 3, the outer surface of the side of the exhalation diaphragm 3 is exposed to the valve seat windows 13, and thus, substantially, the second chamber 12 is open to the atmosphere.

During the inspiratory phase, the positive pressure gas from the ventilator reaches the first conduit 14, the one-way diaphragm 5 between the first conduit 14 and the first chamber 11 is opened, and the gas enters the first chamber 11 and is supplied to the patient from the second conduit 15. At the same time, the gas passes from the first pipeline 14 through the vent valve 17 of the valve seat 1, the circular hole 32 of the expiratory diaphragm and the groove 21 of the valve cover, the pressure is transmitted to the third chamber 31, and the expiratory diaphragm 3 expands downwards to seal the expiratory orifice 4 of the valve seat 1. At this time, the pressure of the gas entering the first chamber 11 through the one-way diaphragm 5 is less than or equal to the pressure of the gas in the third chamber 31, the exhalation port 4 is covered by the exhalation diaphragm 3 and cannot be opened, so that the gas is prevented from leaking from the first chamber 11 to the second chamber 12, and the positive pressure gas of the inhalation phase respirator is ensured to be absorbed by the patient most effectively.

In the expiratory phase, the gas exhaled by the patient enters the first chamber 11 from the second conduit 15, is blocked by the unidirectional diaphragm 5, and cannot escape from the first conduit 14. As the patient exhales, the gas pressure rises, and when the gas pressure in the first chamber 11 is greater than the gas pressure in the third chamber 31, the exhalation diaphragm 3 of the exhalation port 4 is pushed open, and gas enters the second chamber 12 from the first chamber 11 and is exhausted to the atmosphere from the second chamber 12. As the patient exhales, the pressure of the gas in the first chamber 11 gradually decreases until the pressure is equal to or less than the pressure of the gas in the third chamber 31, and the expiratory diaphragm 3 of the expiratory port 4 is closed again, and the pressure in the first chamber 11 is the positive end expiratory pressure PEEP.

The gas pressure of the third chamber 31 determines the positive end expiratory pressure PEEP, and the gas pressure of the third chamber 31 is controlled by the respirator, so that the PEEP value can be controlled according to different physiological characteristics of the patient, and the patient can be enabled to breathe out gas comfortably.

Preferably, the valve cover 2 and the valve base 1 may be coupled by a snap-fit coupling if the valve cover 2 and the valve base 1 are disposable products. If the valve cover 2 and the valve seat 1 are multi-use products, the connection mode of the valve cover 2 and the valve seat 1 can be a screwing connection mode. The utility model discloses a protection scope is not limited to the buckle, and the part that has the same theory of operation is all within protection scope, for example the spinner.

In the present embodiment, as shown in fig. 8, the valve cover 2 and the valve seat 1 are attached by a snap-fit method. The valve cover 2 and the valve seat 1 are in the form of fasteners which are not uniformly distributed, the fasteners 23 and 24 on the valve cover 2 are not equal in length, and the fasteners 23 and 25 are not equal in length, so that the valve cover groove 21 is aligned with the round hole 32 on the expiration membrane 3 and the vent pipe 17 of the valve seat 1 when the valve cover 2 is installed. The unequal length of the catches 23 and 24 and 25 is a mistake proofing design.

The above-mentioned embodiments are only preferred embodiments of the present invention, and the ordinary changes and substitutions performed by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.

Claims

1. An exhalation valve, comprising:

the valve seat (1) is provided with a valve seat main body (10), a first chamber (11) is arranged in the valve seat main body (10), a first pipeline (14) and a second pipeline (15) are connected to two sides of the valve seat main body (10), and an exhalation port (4) is arranged at the upper end of the valve seat main body (10);

an expiratory membrane (3), said expiratory membrane (3) being arranged above said expiratory opening (4) and being capable of sealing said expiratory opening (4);

the valve cover (2) is arranged on the expiration membrane (3), and a third chamber (31) is formed on the valve cover (2) and the inner side of the expiration membrane (3);

wherein the first line (14) has a vent pipe (17) through which vent pipe (17) communicates with the third chamber (31).

2. The exhalation valve of claim 1,

a valve cover groove (21) is formed in the cover bottom of the valve cover (2), and the valve cover groove (21) is communicated with the vent pipe (17), so that the first pipeline (14) is communicated with the third chamber (31) sequentially through the vent pipe (17) and the valve cover groove (21).

3. The exhalation valve of claim 2,

the valve cover groove (21) is long-strip-shaped, one end of the valve cover groove far away from the center of the valve cover is a circular recess, and the circle is aligned with the pipe orifice of the vent pipe (17).

4. The exhalation valve of claim 1,

the exhalation membrane (3) comprises a basin-shaped body (35), a constriction (36) and a rim extension (37), the constriction (36) being smoothly connected to the basin-shaped body (35), the rim extension (37) extending outwardly from the rim of the constriction (36).

5. The exhalation valve of claim 4,

the edge extension part (37) is provided with an exhalation diaphragm round hole (32), and the pipe orifice of the vent pipe (17), the exhalation diaphragm round hole (32) and the circular recess of the valve cover groove (21) are aligned.

6. The exhalation valve of claim 5,

an expiratory membrane square ear (33) projects radially outwardly from the rim extension (37) for positioning.

7. The exhalation valve of claim 1,

the valve cover (2) is provided with a plurality of buckles, the valve cover (2) is combined with the valve seat (1) through the buckles, and the buckles are unequal in length.

8. The exhalation valve of claim 1,

a one-way diaphragm (5) is arranged between the first pipeline (14) and the first chamber (11), and positive air pressure can enter the first chamber (11) from the first pipeline (14) through the one-way diaphragm (5).

9. The exhalation valve of claim 8,

a valve seat grid (19) is arranged between the first pipeline (14) and the first chamber (11), and the one-way diaphragm (5) is arranged on an inner hole of the valve seat grid (19).

10. The exhalation valve of claim 1,

the lower end of the valve seat main body (10) is provided with a pressure detection port (16) used for collecting the inspiratory pressure and the expiratory pressure of a patient, the pressure detection port (16) is communicated with the first chamber (11), and the pressure detection port (16) is connected with a pressure collection port of a breathing machine.