CN210020716U

CN210020716U - Three-way valve

Info

Publication number: CN210020716U
Application number: CN201920279638.1U
Authority: CN
Inventors: 张卫明; 高祥; 许丹蓓
Original assignee: Moxin Beijing Science And Technology Development Co Ltd
Current assignee: Moxin Beijing Science And Technology Development Co Ltd
Priority date: 2018-11-23
Filing date: 2019-03-06
Publication date: 2020-02-07
Anticipated expiration: 2029-03-06

Abstract

The utility model belongs to the valve field provides a three-way valve, include: the body (6), the body (6) has first room (61) and second room (62) through fourth port (8) intercommunication, be provided with first port (7) and third port (4) on first room (61), be provided with first elastic element (10) in first room (61), first elastic element (10) expand and contract through the admit air and the exhaust of first air inlet and outlet (5) to close or open first port (7), be provided with second port (2) on second room (62), be provided with second elastic element (11) in second room (62), second elastic element (11) expand and contract through the admit air and the exhaust of second air inlet and outlet (1), thereby close or open fourth port (8). The utility model can block the air passage between the breathing machine and the patient, thereby controlling the negative pressure suction of the expectoration machine to the air passage of the patient and assisting expectoration.

Description

Three-way valve

Technical Field

The utility model relates to a valve, more specifically relates to a three-way valve.

Background

A expectoration machine is a medical device used in conjunction with a ventilator for removing airway secretions of a patient, and is suitable for patients who use the ventilator to provide invasive mechanical ventilation. During working, the expectoration machine needs to establish an air passage which is effectively communicated with the breathing machine and a patient, and needs to control the on-off of an air passage between the breathing machine and the patient.

The utility model is a connecting piece which connects a breathing machine, a patient and a full-automatic synchronous expectoration machine. The breathing machine pipeline of the breathing machine, the expectoration machine pipeline of the expectoration machine and the patient pipeline are connected with each other through the connecting piece. When the patient is in normal mechanical ventilation, the breathing machine pipeline of the breathing machine is connected to the airway of the patient, and the expectoration machine pipeline of the expectoration machine is closed. When a patient needs expectoration, a breathing machine pipeline of the breathing machine is closed, the expectoration machine pipeline of the expectoration machine is communicated with the patient pipeline, the expectoration machine generates negative pressure in the expiratory phase of the patient, and applies sudden and short expiratory airflow to the patient to promote airway secretions of the patient to be discharged outwards so as to assist the patient in expectoration.

Patent CN 204744830U describes a three-way valve, which comprises a body with a closed space inside, and three ports are arranged on the body; the inside has an elastic element, can warp and seal first port, and the air inlet and outlet sets up on the body, makes elastic element warp through the air inlet and outlet. The disadvantage of this patent is that only the first port can be closed, blocking the airway between the ventilator and the patient. The negative pressure suction of the expectoration machine to the airway of the patient and the auxiliary expectoration can not be controlled.

Therefore, how to design and manufacture a connector meeting the above requirements is a problem to be solved in the prior art.

SUMMERY OF THE UTILITY MODEL

To the problem in the background art, the utility model provides a three-way valve, include:

the body, the body has first room and the second room through the fourth port intercommunication, be provided with first port and third port on the first room, be provided with first elastic element in the first room, first elastic element expands and contracts through the admit air and the exhaust of first air inlet and exhaust mouth to seal or open first port, be provided with the second port on the second room, be provided with the second elastic element in the second room, the second elastic element expands and contracts through the admit air and the exhaust of second air inlet and exhaust mouth, thereby seal or open the fourth port.

Preferably, the first port is connected with a breathing machine pipeline, the second port is connected with a expectoration machine pipeline, the third port is connected with a tracheal cannula of a patient, and the expansion and contraction of the first elastic element and the second elastic element are controlled by the expectoration machine.

Preferably, the first and second elastic elements are balloons or diaphragms.

Preferably, a first blocking grid is projected on the inner wall of the first chamber, and the first blocking grid can guide the expansion direction of the first elastic element.

Preferably, the first elastic member is covered and blocked by the first cover on the side of the first air intake/exhaust port direction.

Preferably, a second blocking grid is projected on the inner wall of the second chamber, the second blocking grid being capable of guiding the expansion direction of the second elastic element.

Preferably, the second elastic member is covered and blocked by the second cover on the side of the second air intake/exhaust port direction.

Preferably, a pressure detection port is provided adjacent the third port of the first chamber for collecting patient airway pressure on the three-way valve.

Preferably, during normal ventilation of the ventilator, the second elastic element is inflated to block the airway of the second port 2 and the third port, the first elastic element is in an unexpanded state, and the inhalation and exhalation generated by the ventilator is transmitted between the first port and the third port.

Preferably, when the incorporated inhalation phase is finished, the expectoration machine inflates the first air inlet and outlet, the first elastic element begins to expand to block the first port, the air path from the first port to the third port is closed to block the air path of the respirator, meanwhile, the expectoration machine releases air in the second elastic element, the second port and the third port are communicated, and negative pressure in the pipeline of the expectoration machine is instantly applied to the patient end at the exhalation phase of the patient.

The utility model has the advantages that: can seal two air passages, namely a patient end-a respirator end and a patient end-a expectoration end. Can block the air passage between the breathing machine and the patient, thereby controlling the negative pressure suction of the expectoration machine to the air passage of the patient and assisting expectoration.

Drawings

Fig. 1 is a perspective view of a three-way valve according to the present invention.

Fig. 2 is a cross-sectional view of a first embodiment of the three-way valve of the present invention.

Fig. 3 is a cross-sectional view of the three-way valve balloon inflated to block the second port.

Fig. 4 is a cross-sectional view of a three-way valve balloon inflated to block the first port.

Fig. 5 is a schematic view of a local structure in the three-way valve body of the present invention.

Fig. 6 is a schematic view of a local structure in the three-way valve body of the present invention.

Fig. 7 is a partial structural sectional view of the three-way valve shown in fig. 3.

Fig. 8 is a partial structural sectional view of the three-way valve shown in fig. 4.

Fig. 9 is a cross-sectional axial view of a second embodiment of the three-way valve of the present invention.

Fig. 10 is a cross-sectional view of a second embodiment of the three-way valve of the present invention.

Reference numerals

The device comprises a second air inlet and outlet 1, a second port 2, a pressure detection port 3, a third port 4, a first air inlet and outlet 5, a body 6, a first port 7, a fourth port 8, a first elastic element 10, a second elastic element 11, a first blocking grid 12, a second blocking grid 13, a first cover 14, a second cover 15, a third cover 16 and a diaphragm 17.

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.

First embodiment

Fig. 1 is a perspective view of a three-way valve according to a first embodiment of the present invention, and fig. 2 is a cross-sectional view of the three-way valve. The utility model discloses a two sacculus three-way valves include body 6, and body 6 is inside to have the enclosure, and inside enclosure is cut apart into first room 61 and second room 62, is linked together by fourth port 8 between first room 61 and the second room 62. The first port 7 and the third port 4 are connected to the first chamber 61. The second chamber 62 is connected to the second port 2. Wherein, the first port 7 is connected with a breathing machine pipeline, the second port 2 is connected with a expectoration machine pipeline, and the third port 4 is connected with a trachea cannula of a patient. Through the three-way valve of the utility model, the air passage of the patient is communicated, and the air passage connection among the patient, the breathing machine and the expectoration machine is established.

A first elastic element 10 is arranged in the first chamber 61, a second elastic element 11 is arranged in the second chamber 62, and the first elastic element 10 and the second elastic element 11 may be balloons. The inflation and deflation of the first elastic element 10 and the second elastic element 11 is controlled by the expectoration machine. This embodiment adopts the sacculus as elastic element, but the utility model discloses a scope of protection is not so limited, and the part that has the same theory of operation is all within the scope of protection. The first elastic member 10 has a first air inlet and outlet 5, and the first elastic member 10 is inflated through the first air inlet and outlet 5, so that the first elastic member 10 can be expanded, and accordingly, the air in the first elastic member 10 can be exhausted through the first air inlet and outlet 5, so that the first elastic member 10 is contracted. A first blocking grid 12 protrudes from the inner wall of the first chamber 61, and the first blocking grid 12 can block the first elastic element 10, and in particular can guide the first elastic element 10 to stretch towards the first port 7 when the first elastic element 10 expands. The other side of the first elastic element 10 is stopped by the inner wall of the first chamber 61.

In addition, as shown in fig. 6, the first elastic member 10 is covered and closed by a first cover 14 on the side of the first air intake/exhaust port 5. As shown in fig. 7, the second elastic member 11 is covered and closed by a second cover 15 on the side of the second air inlet/outlet port 1.

The second elastic element 11 has a second inlet and outlet port 1. The second elastic member 11 may be expanded by inflating the second elastic member 11 through the second inlet/outlet port 1, and accordingly, the gas inside the second elastic member 11 may be exhausted through the second inlet/outlet port 1, so that the second elastic member 11 is contracted. A second blocking grid 13 protrudes from the inner wall of the second chamber 62, and the second blocking grid 13 can block the second elastic element 11, and in particular can guide the second elastic element 11 to stretch towards the fourth port 8 when the second elastic element 11 expands. The other side of the second elastic element 11 is stopped by the inner wall of the second chamber 62.

As shown in fig. 2-4, the first resilient element 10 is capable of blocking the first port 7 when inflated. The second elastic element 11 is capable of blocking the second port 2 and the fourth port 8 when inflated. As shown in fig. 2, the first elastic element 10 and the second elastic element 11 of the three-way valve are in a contracted state, and the first port 7, the second port 2, the third port 4 and the fourth port 8 are in an unblocked state. In fig. 3, the second elastic element 11 is in an expanded state and the first elastic element 10 is in a contracted state. The second port 2 and the fourth port 8 are blocked so that the air path between the first chamber 61 and the second chamber 62 is blocked. In contrast, the gas path between the first port 7 and the third port 4 is open. In fig. 4, the first elastic element 10 is in an expanded state and the second elastic element 11 is in a contracted state. Then, the air path between the first port 7 and the third port 4 is blocked. In contrast, the air path between the second port 2 and the fourth port 8 is open, so that the air path between the first chamber 61 and the second chamber 62 is open.

When the respirator is normally ventilated, the three-way valve is in the state shown in fig. 3. The second elastic element 11 inflates and blocks the air passage of the second port 2 and the third port 4. The first flexible element 10 is in its natural state, i.e. not inflated, and the ventilator generated inspiration and expiration is smoothly transferred between the first port 7 to the third port 4 at the patient end. The air flow provided by the respirator can be delivered to the patient through the end of the respirator via a three-way valve. The patient's exhaled gas may also be returned to the ventilator through a three-way valve.

When the sputum expectoration of a patient needs to be assisted, the internal turbine fan of the sputum production machine is started at first, so that a certain negative pressure is generated in the sputum production pipeline. Since the balloon 11 blocks the patient end and the air passage of the expectoration machine at this time (see fig. 3), the negative pressure in the pipeline of the expectoration machine can be maintained all the time. The expectoration machine automatically judges whether the patient has the expectoration condition. When the conditions are satisfied, the state is as shown in FIG. 4. At the end of the patient's inhalation phase, the expectoration machine inflates the first air inlet and outlet 5, the first elastic element 10 (balloon) starts to expand, the side surface of the balloon is blocked by the first blocking grid 12 and the inner wall of the first chamber 61 of the body 6 during expansion, and the balloon is forced to expand downwards to rapidly block the first port 7, as shown in fig. 5. The air path from the first port 7 to the third port 4 is closed, and the air path of the breathing machine is blocked. Meanwhile, the expectoration machine discharges the gas in the second elastic element 11 through the second air inlet and outlet 1, the second port 2 is communicated with the third port 4, the negative pressure in the pipeline of the expectoration machine is instantly applied to the end of the patient in the expiratory phase of the patient, and a sudden and short expiratory airflow is generated for the patient, so that the secretion of the airway of the patient is promoted to be discharged outwards, and the expectoration of the patient is assisted.

Before the expectoration machine judges that the expiratory phase of the patient is about to end, the second elastic element 11 is inflated through the second air inlet and outlet 1, the second elastic element 11 starts to expand, the side face of the balloon can be blocked by the second blocking grid 13 shown in fig. 6 and the inner wall of the second chamber 62 of the body 6 during expansion, the balloon is forced to expand upwards to rapidly block the fourth port 8, as shown in fig. 3, so that the air passages of the second port 2 and the third port 4 are blocked, meanwhile, the first elastic element 10 is deflated through the first air inlet and outlet 5, the first port 7 and the third port 4 are reconnected, the air passages of the breathing machine and the patient end are conducted, and the patient returns to a normal ventilation state.

In addition, a pressure detection port 3 is arranged beside a third port 4 at the patient end of the first chamber 61 and used for collecting the airway pressure of the patient on the three-way valve, and the pressure detection port can be used as one of the bases for judging the breathing phase and expectoration time of the patient by the expectoration machine.

Second embodiment

In the first embodiment, the first elastic member 10 and the second elastic member 11 of the three-way valve employ balloons. In the second embodiment of the present invention, the first elastic element 10 and the second elastic element 11 are provided with the diaphragm 17. The structure of the diaphragm 17 is shown in fig. 9, and fig. 9 shows a partial sectional view of the diaphragm 17. The periphery of the diaphragm has a bulge which can snap onto the body 6 and when inflated, the diaphragm expands outwardly to block the first port 7 and the fourth port 8.

Accordingly, the means for fixing the elastic element to the body 6 also need to be modified so as to be suitable for fixing the membrane 17 and to form a separate closed space therewith. In the present embodiment, a third cover 16 is used to cover and close the diaphragm 17, as shown in fig. 10, which shows a cross-sectional view of an embodiment of the three-way valve using a diaphragm as an elastic member in fig. 10. This structure can be adopted for both the first elastic element 10 and the second elastic element 11.

Whether the three-way valve adopts a diaphragm or a balloon, a closed space needs to be formed inside the balloon or the diaphragm, and compressed gas enters through an air inlet and an air outlet and can cause the balloon or the diaphragm to expand to close the first port 7 or the second port 2.

The utility model discloses a three-way valve not only can be used to the gas circuit, also can be used to liquid.

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. A three-way valve, comprising:

a body (6), the body (6) having a first chamber (61) and a second chamber (62) communicating through a fourth port (8),

the first chamber (61) is provided with a first port (7) and a third port (4), the first chamber (61) is internally provided with a first elastic element (10), the first elastic element (10) expands and contracts through the air intake and exhaust of the first air intake and exhaust port (5) so as to close or open the first port (7),

the second chamber (62) is provided with a second port (2), a second elastic element (11) is arranged in the second chamber (62), and the second elastic element (11) expands and contracts through air intake and exhaust of the second air intake and exhaust port (1) so as to close or open the fourth port (8).

2. A three-way valve according to claim 1,

the first port (7) is connected with a breathing machine pipeline, the second port (2) is connected with a expectoration machine pipeline, the third port (4) is connected with a tracheal cannula of a patient, and the expansion and contraction of the first elastic element (10) and the second elastic element (11) are controlled by the expectoration machine.

3. A three-way valve according to claim 1,

the first elastic element (10) and the second elastic element (11) are balloons or membranes.

4. A three-way valve according to claim 1,

a first blocking grid (12) protrudes from the inner wall of the first chamber (61), and the first blocking grid (12) can guide the expansion direction of the first elastic element (10).

5. A three-way valve according to claim 1,

the first elastic element (10) is covered and blocked by a first cover (14) at one side of the first air inlet and outlet (5) direction.

6. A three-way valve according to claim 1,

a second blocking grid (13) protrudes from the inner wall of the second chamber (62), and the second blocking grid (13) can guide the expansion direction of the second elastic element (11).

7. A three-way valve according to claim 1,

the second elastic element (11) is covered and blocked by a second cover (15) at one side of the direction of the second air inlet and outlet (1).

8. A three-way valve according to claim 1, characterized in that beside the third port (4) of the first chamber (61) a pressure sensing port (3) is provided for taking the patient's airway pressure on the three-way valve.

9. A three-way valve according to claim 2,

when the respirator is normally ventilated, the second elastic element (11) is inflated to block the air passages of the second port (2) and the third port (4), the first elastic element (10) is in an unexpanded state, and inhalation and exhalation generated by the respirator are transmitted between the first port (7) and the third port (4).

10. A three-way valve according to claim 2,

when the inspiration phase of a patient is finished, the expectoration machine inflates the first air inlet and outlet (5), the first elastic element (10) begins to expand to block the first port (7), the air path from the first port (7) to the third port (4) is closed to block the air path of the breathing machine, meanwhile, the expectoration machine exhausts the air in the second elastic element (11), the second port (2) and the third port (4) are communicated, and the negative pressure in the pipeline of the expectoration machine is instantly applied to the patient end at the expiration phase of the patient.