Safety valve of breathing machine

Abstract

The utility model discloses a breathing machine safety valve which comprises a communicating pipe body, a pressure relief mechanism communicated with the communicating pipe body and an emergency air suction mechanism communicated with the communicating pipe body and used for providing an autonomous breathing channel for a patient when a breathing machine breaks down. An air inlet, an air outlet and an emergency air suction inlet are formed in the communicating pipe body, and the emergency air suction mechanism is arranged on the emergency air suction inlet in the communicating pipe body in a communicating mode. The breathing machine is simple in structure, easy and convenient to install, low in manufacturing cost and high in practicability, closing or opening of the opening of the air leakage pipe is achieved in an air control mode, the maximum pressure in the main air channel can be accurately and sensitively controlled, the emergency air suction mechanism can provide an autonomous breathing channel for a patient when the breathing machine breaks down, and the breathing machine is safe and reliable. And the safety and the reliability of the device can be effectively improved.

Description

Technical Field

[0001] The utility model relates to a safety valve, in particular to a breathing machine safety valve. Background Art

[0002] A ventilator is a device that can replace, control or change a person's normal physiological breathing. It is usually used to increase the patient's lung ventilation, improve the patient's respiratory function, reduce respiratory power consumption, and save the patient's heart reserve capacity.

[0003] The air circuit system in the ventilator usually includes a main airway and a ventilator safety valve arranged on the main airway. The ventilator safety valve is an important component to ensure the patient's safe inhalation. The ventilator safety valve usually adopts an elastic one-way valve type safety valve. However, the existing elastic one-way valve type safety valve usually has the following defects when used:

[0004] (1) Elastic one-way valve type safety valves can usually only play a role in pressure relief, that is, when the output pressure of the main airway is greater than the upper limit of the preset pressure, the elastic one-way valve type safety valve will start to relieve pressure to prevent the excessive pressure of the main airway from causing damage to the patient and causing safety problems. However, when the ventilator fails and cannot provide sufficient positive pressure gas, the above-mentioned safety valve is not provided with a channel for the patient to inhale air in an emergency. At this time, the patient cannot breathe air independently, which will affect the safety of the safety valve.

[0005] (2) The elastic check valve type safety valve has many internal auxiliary parts, complex assembly and high manufacturing cost. When the elastic check valve type safety valve is working, the maximum pressure in the main airway is controlled mainly by controlling the spring force in the elastic check valve type safety valve. However, the precision of adjusting the spring force is low, so the maximum pressure in the main airway cannot be accurately controlled. In addition, the method of achieving valve body pressure relief through the spring has the problems of poor sensitivity and long reaction time of opening and closing pressure relief functions, which will affect the safety of the safety valve. Summary of the invention

[0006] In order to solve the above deficiencies in the prior art, the utility model aims to provide a ventilator safety valve to achieve the purpose of improving the safety of the safety valve.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a ventilator safety valve, including a connecting pipe body, a pressure relief mechanism connected to the connecting pipe body, and an emergency air intake mechanism connected to the connecting pipe body for providing a patient with an autonomous breathing channel when the ventilator fails; the connecting pipe body is provided with an air inlet, an air outlet and an emergency air intake, and the emergency air intake mechanism is connected to the emergency air intake arranged on the connecting pipe body.

[0008] As a limitation of the present utility model, the pressure relief mechanism includes a pressure relief mounting seat arranged on a connecting pipe body, an air relief pipe located in the pressure relief mounting seat and connected to the connecting pipe body, a pressure relief diaphragm located on the pressure relief mounting seat and above the air relief pipe, a cover plate arranged above the pressure relief diaphragm, a pressure pipe connector connected to the cover plate and used for connecting to a pressure pipe of a ventilator, and an end cover arranged on the pressure relief mounting seat and used for limiting the cover plate on the pressure relief mounting seat, wherein a gas discharge channel is left between the pressure relief mounting seat and the connecting pipe body for discharging gas into the outside atmosphere.

[0009] As a further limitation of the present utility model, the pressure relief diaphragm includes a pressure relief diaphragm sealing portion, a first flow stabilizing and noise reduction component fixedly mounted at the bottom of the pressure relief diaphragm sealing portion, a pressure relief diaphragm sensitive connecting portion fixedly mounted on the periphery of the pressure relief diaphragm sealing portion, and a pressure relief diaphragm fixing portion fixedly mounted on the periphery of the pressure relief diaphragm sensitive connecting portion, wherein the pressure relief diaphragm fixing portion is placed on the pressure relief mounting seat, the pressure relief diaphragm sealing portion is located above the air relief pipe, and a gap is left between the pressure relief diaphragm sealing portion and the opening above the air relief pipe.

[0010] As a further limitation of the present invention, the emergency air intake mechanism includes an emergency air intake port mounting seat detachably connected to one end of the emergency air intake port on the connecting pipe body, an intake diaphragm placed in the emergency air intake port mounting seat, and a second flow stabilizing and noise reduction component fixed to the bottom of the intake diaphragm and slidably connected to the emergency air intake port mounting seat, wherein a plurality of ventilation holes are opened at the bottom of the emergency air intake port mounting seat, and the intake diaphragm covers the plurality of ventilation holes.

[0011] As a further limitation of the present invention, a positioning groove is provided in the pressure relief mounting seat, and a positioning block adapted to the positioning groove is provided on the cover plate to limit the cover plate on the pressure relief mounting seat.

[0012] As a further limitation of the present invention, the end cover is threadedly connected to the pressure relief mounting seat, and a plurality of anti-slip protrusions are fixedly arranged at intervals on the outer circumference of the end cover.

[0013] As a further limitation of the present invention, a pagoda joint is connected to the air outlet.

[0014] As a further limitation of the present invention, a conical joint is connected to the air inlet.

[0015] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0016] (1) The utility model is provided with a pressure relief mechanism and an emergency air inhalation mechanism, wherein the pressure relief mechanism can start the pressure relief work when the output pressure of the main airway is greater than the upper limit of the preset pressure, so as to prevent the excessive pressure of the main airway from causing damage to the patient and causing safety problems. The emergency air inhalation mechanism can provide the patient with an autonomous breathing channel when the ventilator fails, which can effectively improve the safety of the utility model.

[0017] (2) The pressure relief mechanism in the utility model adopts a structural form that combines a pressure relief mounting seat, a venting pipe, a pressure relief diaphragm, a cover plate, a pressure pipe connector and an end cover. The structure is simple and the manufacturing cost is low. When in use, the ventilator pressure pipe and the pressure pipe connector are connected, and then the pressure of the gas in the ventilator pressure pipe is adjusted according to actual needs. The gas in the ventilator pressure pipe enters the pressure relief diaphragm through the pressure pipe connector and presses the pressure relief diaphragm against the venting pipe. At this time, the pressure relief diaphragm can close the opening of the ventilator. When the pressure of the main airway in the ventilator air circuit system exceeds the set value, the gas in the connecting pipe body in the utility model can push the pressure relief diaphragm upward. At this time, the pressure relief diaphragm can open the opening of the ventilator, and the gas flows out of the ventilator and is discharged into the outside atmosphere through the channel between the pressure relief mounting seat and the connecting pipe body. The utility model realizes the closing or opening of the ventilator opening by gas control, which can accurately and sensitively control the maximum pressure in the main airway, thereby effectively improving the safety and reliability of the utility model.

[0018] (3) In the utility model, an air inlet, an air outlet and an emergency air suction port are integrated on the connecting pipe body, and a gas discharge channel is provided between the connecting pipe body and the pressure relief mounting seat. The overall structure is simple and compact, which can shorten the gas flow path and thus reduce the resistance to gas flow. At the same time, it can also reduce the overall installation difficulty of the utility model, effectively improving the practicality of the utility model.

[0019] (4) The pressure relief diaphragm in the utility model adopts a structural form that combines a pressure relief diaphragm sealing part, a first flow stabilizing noise reduction component, a pressure relief diaphragm sensitive connection part, and a pressure relief diaphragm fixing part, wherein the pressure relief diaphragm sealing part can seal the opening of the air release pipe, the pressure relief diaphragm sensitive connection part can sensitively sense the flow of gas so as to sensitively open or close the opening of the air release pipe, and the pressure relief diaphragm fixing part can be stably placed on the pressure relief mounting seat. The first flow stabilizing noise reduction component can reduce noise and guide gas more stably, which can effectively improve the stability and practicality of the utility model when used.

[0020] (5) The emergency air inhalation mechanism of the utility model adopts a structural form that combines an emergency air inlet mounting seat, an inhalation diaphragm, and a second flow stabilization and noise reduction component. When the ventilator cannot provide sufficient positive pressure gas, negative pressure will be generated in the connecting tube body, and the inhalation diaphragm can sensitively sense the airflow and move upward quickly. At this time, the multiple vents at the bottom of the emergency air inlet mounting seat are opened, and the patient can breathe independently. The second flow stabilization and noise reduction component can reduce noise and guide gas more stably, which can effectively improve the stability and practicality of the utility model when used.

[0021] (6) The positioning block on the cover plate of the utility model cooperates with the positioning groove in the pressure relief mounting seat, so that the cover plate can be stably fixed in the pressure relief mounting seat, which can improve the firmness of the installation of the utility model. The end cover is threadedly connected to the pressure relief mounting seat, and a plurality of anti-skid protrusions are arranged on the outside of the end cover, which can increase the friction between the hand and the end cover, thereby effectively improving the convenience of disassembly of the utility model.

[0022] (7) The utility model is provided with a pagoda connector on the air outlet and a conical connector on the air inlet, which can be conveniently connected to the external pipeline in the ventilator air circuit system, and can effectively improve the convenience of operation of the utility model.

[0023] In summary, the utility model has a simple structure, is easy to install, has a low manufacturing cost and is highly practical. It can close or open the opening of the vent pipe by gas control, and can accurately and sensitively control the maximum pressure in the main airway. In addition, the emergency air inhalation mechanism in the utility model can provide the patient with an autonomous breathing channel when the ventilator fails, which can effectively improve the safety and reliability of the utility model. The utility model is suitable for installation on a ventilator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Figure 1 A three-dimensional diagram of an embodiment of the utility model;

[0026] Figure 2 This is a disassembly diagram of an embodiment of the utility model;

[0027] Figure 3 A top view of an embodiment of the utility model;

[0028] Figure 4 for Figure 3 Sectional view in the AA direction;

[0029] Figure 5It is a schematic diagram of the connection relationship between the connecting pipe body, the pressure relief mounting seat, the air relief pipe, the pagoda joint, and the conical joint in the embodiment of the utility model;

[0030] Figure 6 It is a cross-sectional view of the cover plate in the embodiment of the utility model;

[0031] Figure 7 This is a front view of the pressure relief diaphragm in the embodiment of the utility model;

[0032] Figure 8 It is a cross-sectional view of the pressure relief diaphragm in the embodiment of the utility model;

[0033] Fig. 9 Schematic diagram of the connection relationship between the air-intake diaphragm and the second flow stabilizing and noise reducing component in the embodiment of the utility model;

[0034] Fig.10 A three-dimensional diagram of the emergency air intake port mounting base in the embodiment of the utility model;

[0035] Fig.11 It is a schematic diagram of the connection relationship between the emergency air inlet mounting seat and the second flow stabilizing and noise reducing component in the embodiment of the utility model;

[0036] Fig.12 A schematic diagram of the gas flow direction during normal inhalation in an embodiment of the utility model;

[0037] Fig.13 A schematic diagram of the gas flow direction during the deflation operation of an embodiment of the utility model;

[0038] Fig.14 A schematic diagram of the gas flow direction during autonomous breathing of an embodiment of the utility model;

[0039] In the figure: 1. connecting pipe body; 2. air inlet; 3. air outlet; 4. emergency air suction port; 5. gas discharge channel; 6. pressure relief mounting seat; 7. air relief pipe; 8. pressure relief diaphragm; 9. cover plate; 10. pressure pipe connector; 11. end cover; 12. emergency air suction port mounting seat; 13. air intake diaphragm; 14. second flow stabilizing and noise reduction component; 15. sealing ring; 16. conical joint; 17. pagoda joint; 18. anti-slip bump; 19. vent hole; 20. mounting through hole; 81. pressure relief diaphragm sealing part; 82. pressure relief diaphragm sensitive connecting part; 83. pressure relief diaphragm fixing part; 84. first flow stabilizing and noise reduction component; 141. round rod; 142. limit block; 143. connecting block. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention, and are not used to limit the present invention.

[0041] Embodiment A breathing machine safety valve

[0042] like Figure 1 , Figure 2 As shown, this embodiment includes a connecting tube body 1, a pressure relief mechanism connected to the connecting tube body 1, and an emergency air inhalation mechanism connected to the connecting tube body 1 for providing a patient with a spontaneous breathing channel when a ventilator fails.

[0043] The connecting pipe body 1 is an integrally formed tubular structure made of plastic material, and is provided with an air inlet 2, an air outlet 3 and an emergency air suction port 4.

[0044] like Figure 3 , Figure 4 , Figure 6 As shown, the pressure relief mechanism includes a pressure relief mounting seat 6 arranged on the connecting pipe body 1, a gas relief pipe 7 located in the pressure relief mounting seat 6 and connected to the connecting pipe body 1, a pressure relief diaphragm 8 located above the gas relief pipe 7 and arranged on the pressure relief mounting seat 6, a cover plate 9 arranged above the pressure relief diaphragm 8, a pressure pipe connector 10 connected to the cover plate 9 and used for connecting to the pressure pipe of the ventilator, and an end cover 11 threadedly connected to the pressure relief mounting seat 6 and used for limiting the cover plate 9 on the mounting seat, and a plurality of anti-slip bumps 18 are fixedly provided at intervals on the outer circumference of the end cover 11, as shown in FIG. Figure 5 As shown, a gas discharge channel 5 is left between the pressure relief mounting seat 6 and the connecting pipe body 1 for gas to be discharged to the outside atmosphere. Specifically, in this embodiment, a rectangular positioning groove is provided in the pressure relief mounting seat 6, and a rectangular positioning block adapted to the positioning groove is provided on the cover plate 9 to limit the cover plate 9 on the pressure relief mounting seat 6. Figure 7 , Figure 8As shown, the pressure relief diaphragm 8 includes a pressure relief diaphragm sealing portion 81, a first flow stabilizing noise reduction component 84 fixedly arranged at the bottom center position of the pressure relief diaphragm sealing portion 81, a pressure relief diaphragm sensitive connecting portion 82 fixedly arranged on the circumference of the pressure relief diaphragm sealing portion 81, and a pressure relief diaphragm fixing portion 83 fixedly arranged on the circumference of the pressure relief diaphragm sensitive connecting portion 82. The pressure relief diaphragm sealing portion 81, the pressure relief diaphragm sensitive connecting portion 82 and the pressure relief diaphragm fixing portion 83 are all made of silicone material and are integrally formed. The silicone material is a silicone material with a special hardness. The silicone material is more sensitive to changes in gas pressure to ensure that the pressure in the main airway can be accurately and sensitively controlled. Furthermore, the pressure relief diaphragm sealing portion 81 adopts a cylindrical plate, the pressure relief diaphragm sensitive connecting portion 82 adopts a circular ring groove, and the pressure relief diaphragm fixing portion 83 adopts a circular ring plate. The bottom of the cylindrical plate is fixed at the top center of the circular ring groove, and the bottom of the circular ring plate is fixed at the top of the circular ring groove. The pressure relief diaphragm fixing portion 83 is placed on the pressure relief mounting seat 6, and the pressure relief diaphragm sealing portion 81 is located above the air relief pipe 7. A gap is left between the pressure relief diaphragm sealing portion 81 and the opening above the air relief pipe 7, and a gap is left between the cover plate 9 and the pressure relief diaphragm.

[0045] The emergency air intake mechanism comprises an emergency air intake port mounting seat 12 detachably connected to one end of the emergency air intake port 4 on the connecting pipe body 1, an air intake diaphragm 13 placed in the emergency air intake port mounting seat 12, and a second flow stabilizing and noise reduction component 14 fixedly arranged at the bottom of the air intake diaphragm 13 and slidably connected to the emergency air intake port mounting seat 12, wherein the emergency air intake port mounting seat 12 is sealed and connected to the connecting pipe body 1 through a sealing ring 15, such as Fig.10 As shown, the bottom of the emergency air inlet mounting base 12 is provided with a plurality of vent holes 19, and the air inlet diaphragm 13 is sealed on the plurality of vent holes 19, and the air inlet diaphragm 13 is made of a silicone material. Fig. 9 As shown, the second flow stabilizing and noise reducing component 14 includes a connecting block 143 fixed at the bottom of the air inhalation diaphragm 13, a round rod 141 fixed at the bottom of the connecting block 143, and a stopper 142 fixed on the side circumference of the round rod 141. A mounting through hole 20 adapted to the round rod 141 is provided at the middle position of the bottom of the emergency air inlet mounting seat 12 so that the round rod 141 can slide on the mounting through hole 20. Fig.11As shown, the round rod 141 is inserted into the mounting through hole 20 and is limited on the emergency air inlet mounting seat 12 by the limiting block 142. A distance is left between the limiting block 142 and the bottom of the emergency air inlet mounting seat 12 to ensure that the limiting rod can slide up and down without leaving the emergency air inlet mounting seat 12. Two clamping blocks are correspondingly fixed on the outer wall of the connecting pipe body 1 close to the emergency air inlet 4, and the side wall of the emergency air inlet mounting seat 12 is correspondingly provided with clamping grooves adapted to the two clamping blocks. The two clamping grooves on the side wall of the emergency air inlet mounting seat 12 are correspondingly clamped on the two clamping blocks to fix the emergency air inlet mounting seat 12 at the position of the emergency air inlet 4 on the connecting pipe body 1.

[0046] In order to improve the convenience of using this embodiment, this embodiment is connected to the air outlet 3 with an existing pagoda connector 17, and is connected to the air inlet 2 with an existing conical connector 16, wherein the pagoda connector 17 and the conical connector 16 are adapted to the corresponding external pipeline connectors in the ventilator to firmly and tightly connect this embodiment and the external pipeline in the ventilator.

[0047] The specific working principle of this embodiment is as follows:

[0048] 1. Working principle during normal inhalation

[0049] When the gas pressure in the main airway of the ventilator reaches the safe pressure value, the patient can inhale normally. Fig.12 As shown, the gas in the pressure pipe of the ventilator enters the pressure relief mounting seat 6 through the pressure pipe connector 10 and applies a downward force to the pressure relief diaphragm 8. The pressure relief diaphragm 8 moves downward and leaves a gap between the pressure relief diaphragm sealing portion 81 and the upper opening of the air relief pipe 7. At this time, the gas discharge channel 5 between the pressure relief mounting seat 6 and the connecting pipe body 1 is closed, and the gas flows from the air inlet 2 in this embodiment to the air outlet 3 and enters the patient's lungs, completing the patient's normal inhalation process.

[0050] 2. Working principle of deflation

[0051] The gas pressure in the main airway of the ventilator is greater than the preset safety pressure in the pressure pipe of the ventilator, and the main airway of the ventilator is in an overpressure state. Correspondingly, the connecting pipe body 1 in this embodiment is in an overpressure state, and it is necessary to perform air release. Specifically, Fig.13As shown, the gas pressure in the ventilator pressure tube decreases, and the gas pressure in the pressure tube joint also decreases accordingly. At the same time, the gas in the connecting tube body 1 applies an upward force to the pressure relief diaphragm 8, and the pressure relief diaphragm 8 moves upward and opens with a gap between the pressure relief diaphragm sealing portion 81 and the upper opening of the air relief pipe 7. At this time, the gas discharge channel 5 between the pressure relief mounting seat 6 and the connecting tube body 1 is opened, and the gas in the connecting tube body 1 is quickly discharged into the outdoor atmosphere, which can avoid damage to the patient's body caused by excessive gas pressure.

[0052] 3. Working principle of spontaneous breathing

[0053] When the ventilator fails, only a small amount of gas enters the air inlet or no gas enters the air inlet. At this time, the ventilator cannot provide sufficient positive pressure gas for the patient to breathe. When only a small amount of gas enters the air inlet or no gas enters the air inlet, the working principle of the emergency air intake mechanism in this embodiment is the same, such as Fig.14 As shown, this embodiment is explained with only a small amount of gas entering from the air inlet. At this time, negative pressure will be generated in the connecting tube body 1, and the air inhalation diaphragm 13 will move upward. At this time, the gas can enter the connecting tube body 1 from the multiple air vents 19 at the bottom of the emergency air inlet mounting seat 12 and flow to the air outlet 3 to enter the patient's lungs. The patient can breathe independently to prevent the patient from suffocation.

[0054] It should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A ventilator safety valve, characterized in that: The invention comprises a connecting pipe body, a pressure relief mechanism connected to the connecting pipe body, and an emergency air suction mechanism connected to the connecting pipe body for providing a patient with an autonomous breathing channel when a ventilator fails; the connecting pipe body is provided with an air inlet, an air outlet and an emergency air suction port, and the emergency air suction mechanism is connected to the emergency air suction port arranged on the connecting pipe body; the pressure relief mechanism comprises a pressure relief mounting seat arranged on the connecting pipe body, a pressure relief pipe connected to the pressure relief mounting seat arranged on the connecting pipe body, a pressure relief diaphragm arranged on the pressure relief mounting seat and located above the pressure relief pipe, a cover plate arranged above the pressure relief diaphragm, and a pressure relief diaphragm connected to the cover plate and used for connecting to the pressure pipe of the ventilator The connecting pipe comprises a pressure pipe connector connected to the pressure relief mounting seat and an end cover arranged on the pressure relief mounting seat for limiting the cover plate on the pressure relief mounting seat, wherein a gas discharge channel is reserved between the pressure relief mounting seat and the connecting pipe body for discharging gas to the outside atmosphere; the pressure relief diaphragm comprises a pressure relief diaphragm sealing part, a first flow stabilizing and noise reduction component fixedly arranged at the bottom of the pressure relief diaphragm sealing part, a pressure relief diaphragm sensitive connecting part fixedly arranged on the periphery of the pressure relief diaphragm sealing part, and a pressure relief diaphragm fixing part fixedly arranged on the periphery of the pressure relief diaphragm sensitive connecting part, wherein the pressure relief diaphragm fixing part is placed on the pressure relief mounting seat, the pressure relief diaphragm sealing part is located above the air relief pipe, and a gap is reserved between the pressure relief diaphragm sealing part and the opening above the air relief pipe.

2. A breathing machine safety valve according to claim 1, characterized in that: The emergency air intake mechanism includes an emergency air intake port mounting seat detachably connected to one end of the emergency air intake port on the connecting pipe body, an air intake diaphragm placed in the emergency air intake port mounting seat, and a second flow stabilizing and noise reduction component fixedly arranged at the bottom of the air intake diaphragm and slidably connected to the emergency air intake port mounting seat, wherein a plurality of ventilation holes are opened at the bottom of the emergency air intake port mounting seat, and the air intake diaphragm covers the plurality of ventilation holes.

3. A breathing machine safety valve according to claim 2, characterized in that: A positioning groove is arranged in the pressure relief mounting seat, and a positioning block adapted to the positioning groove is arranged on the cover plate to limit the cover plate on the pressure relief mounting seat.

4. A ventilator safety valve according to any one of claims 1 to 3, characterized in that: The end cover is threadedly connected to the pressure relief mounting seat, and a plurality of anti-skid protrusions are fixedly arranged at intervals on the outer circumference of the end cover.

5. A breathing machine safety valve according to claim 4, characterized in that: The air outlet is connected with a pagoda joint.

6. A breathing machine safety valve according to claim 5, characterized in that: The air inlet is connected with a conical joint.

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