CN219700725U - Gas pipeline system of breathing machine - Google Patents

Abstract

The utility model provides a gas pipeline system of a breathing machine, which comprises a safety valve, wherein an air inlet interface and an air outlet interface are arranged on the safety valve, the air inlet interface is used for being communicated with a main air passage of the breathing machine, the air outlet interface is used for being communicated with an air suction branch which is used for being communicated with a breathing system of a patient, a first pressure sensor which is used for detecting air suction pressure of the patient end is communicated with a sampling pipeline which is used for being communicated with the air suction branch, a first side flow port is further arranged on the safety valve, a purging pipe is communicated between the first side flow port and the sampling pipeline, and an air resistance piece is arranged in the purging pipe. When the utility model is used, after the gas in the main air passage enters the safety valve, one gas enters the respiratory system of a patient through the air suction branch, and the other gas enters the purging pipe from the first side flow port under the action of the air resistance piece, the device is stable and enters the sampling pipeline to purge with fixed flow, so that water vapor is effectively prevented from entering the first pressure sensor to be condensed and accumulated, damage to components and deviation from pressure monitoring are prevented, and the control of the breathing machine is more accurate.

Description

Gas pipeline system of breathing machine

Technical Field

The utility model relates to the field of medical equipment, in particular to a gas pipeline system of a breathing machine.

Background

A ventilator is a device that can replace, control or alter the normal physiological breathing of a person, often used to increase the patient's pulmonary ventilation, improve the patient's respiratory function, reduce the consumption of respiratory power, and save the patient's heart reserve. The gas pipeline system of the breathing machine comprises a main air passage, a breathing pipeline and a safety valve arranged on the main air passage, wherein the safety valve is provided with an air outlet interface, an air suction branch of the breathing pipeline is externally connected with the air outlet interface to enter the breathing system of a patient, and an air outlet pipeline of the breathing pipeline is connected with an air outlet valve of the breathing machine. Therefore, in the operation process of the breathing machine, when the output pressure of the main air passage is larger than the upper limit of the preset pressure, the safety valve can start to release pressure, and the safety problem is prevented from being caused by damage to a patient due to the fact that the pressure of the main air passage is too high.

In order to be able to detect the inspiratory pressure at the patient side, a sampling line is usually connected to the inspiratory limb, which sampling line is connected to a pressure sensor of the ventilator for monitoring the inspiratory pressure at the patient side. In the expiration stage of a patient, most carbon dioxide and water vapor enter the expiration valve through an expiration pipeline and are discharged to the atmosphere, and a small part of water vapor can enter the pressure sensor through the sampling pipeline, so that the monitoring data of the pressure sensor are very easy to be inaccurate or damaged, the performance of the respirator is greatly influenced, and the patient is seriously possibly injured.

The existing solution is as follows: the condensed water is blown away by adopting a high-pressure high-speed air flow, the cost of the breathing machine is increased due to the additional high-pressure air source and a pressure reducing valve for regulating the pressure, and the separate air source for blowing is excessively wasted and the structure is complicated.

Disclosure of Invention

The utility model aims to at least solve one of the technical problems in the prior art, and provides a gas pipeline system of a breathing machine, which adopts a side-flow purging mode and controls purging gas flow through fixed air resistance, so that the influence on a pressure detection result is avoided, an independent gas source is not required to be additionally added, and the cost of the breathing machine is reduced.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

the utility model provides a gas piping system of breathing machine, includes relief valve and sampling pipeline, be provided with the interface of admitting air and go out the interface on the relief valve, the interface of admitting air is used for communicating with the main air flue of breathing machine, the interface of giving vent to anger is used for the branch road of breathing in of intercommunication breathing machine, sampling pipeline with the branch road intercommunication of breathing in and access are used for detecting patient end suction pressure's first pressure sensor on the breathing machine, still be provided with first side stream mouth on the relief valve, the intercommunication has the purge tube between first side stream mouth and the sampling pipeline, be provided with the air resistor in the purge tube, the air resistor is used for controlling the air current in the purge tube lets in with fixed flow in the sampling pipeline purges.

Further, including first T type joint, the sampling pipeline includes first branch pipe and second branch pipe, first interface and the second interface of first T type joint respectively with the one end connection of first branch pipe and second branch pipe is fixed, the other end of first branch pipe and second branch pipe respectively with the sampling pipeline with first pressure sensor communicates, the third interface of first T type joint with the purge tube communicates.

Further, the air resistor is arranged at one end close to the first T-shaped joint.

Further, the sampling pipeline further comprises a main sampling pipe, a sampling joint is arranged at one end, deviating from the first sampling pipe, of the second sampling pipe, and the sampling joint is communicated with the air suction branch through the main sampling pipe.

Further, the device also comprises a pressure detection pipeline, one end of the pressure detection pipeline is communicated with the safety valve, and the other end of the pressure detection pipeline is connected with a second pressure sensor for detecting the pressure in the main air passage.

Further, the purge pipe is communicated with the first bypass port through the pressure detection pipeline.

Further, the gas pipeline system of the breathing machine further comprises a second T-shaped joint, the pressure detection pipeline comprises a first detection pipe and a second detection pipe, a first interface and a second interface of the second T-shaped joint are respectively connected and fixed with one ends of the first detection pipe and the second detection pipe, the other ends of the first detection pipe and the second detection pipe are respectively connected and communicated with the first side flow port and the second pressure sensor, and a third interface of the second T-shaped joint is communicated with the purging pipe.

Further, the gas pipeline system of the breathing machine further comprises a zero calibration valve, wherein the zero calibration valve is arranged between the pressure detection pipeline and the first pressure sensor and is used for calibrating zero of the first pressure sensor.

Further, the zero calibration valve is further arranged on the sampling pipeline and connected with the second pressure sensor, and the zero calibration valve is further used for calibrating zero of the second pressure sensor.

Further, each pipe fitting in the pressure detection pipeline and/or the sampling pipeline is a silica gel pipe.

The beneficial effects of the utility model are as follows:

1. when the pressure sensor is used, mixed gas for the respiratory system of a patient enters the safety valve from the main air passage of the breathing machine, one gas enters the respiratory system of the patient through the air suction branch, and the other gas enters the purging pipe from the first side flow port, the magnitude of purging gas flow which is introduced into the sampling pipeline is ensured to be small enough under the action of the air resistance piece, so that the influence of the purging gas flow on the pressure measurement result of the first pressure sensor communicated with the sampling pipeline is negligible, thereby effectively avoiding influencing the pressure detection result of the first pressure sensor, avoiding the condensation accumulation of water vapor entering the first pressure sensor, and preventing the damage of the first pressure sensor and the deviation of pressure monitoring.

2. Because the purge flow comes from the safety valve, an additional pressure regulating valve and a separate air source are not needed, so that the cost of the breathing machine is effectively reduced.

Drawings

The utility model will be described in further detail with reference to the drawings and the detailed description.

FIG. 1 is a schematic diagram of a gas circuit system for a ventilator according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a gas circuit system for a ventilator according to one embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a gas pipeline system related to a ventilator according to a second embodiment of the present utility model.

Wherein, each reference sign in the figure:

10. a safety valve; 101. an air inlet interface; 102. an air outlet interface; 103. a first bypass port; 104. a second bypass port; 20. a sampling pipeline; 201. a first sample tube; 2011. a sampling joint; 202. a second sample tube; 21. a first T-joint; 30. a purge tube; 40. an air-blocking member; 50. a pressure detection line; 501. a first detection tube; 502. a second detection tube; 51. a second T-joint; 60. and (5) calibrating a zero valve.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Embodiment one:

referring to fig. 1 to 2, a preferred embodiment of the present utility model shows a gas line system of a ventilator, comprising a safety valve 10 and a sampling line 20, wherein the safety valve 10 is provided with an inlet port 101 and an outlet port 102, the inlet port 101 is used for communicating with a main airway of the ventilator, the outlet port 102 is used for an inhalation branch (not shown) of the breathing line of the ventilator, and the inhalation branch is used for connecting with the respiratory system of a patient. The sampling pipeline 20 is communicated with an inhalation branch and is connected to a first pressure sensor on the breathing machine for detecting inhalation pressure of a patient end, a first bypass port 103 is further arranged on the safety valve 10, a purging pipe 30 is communicated between the first bypass port 103 and the sampling pipeline 20, and an air resistance piece 40 is arranged in the purging pipe 30. Therefore, when the gas pipeline system of the breathing machine is used, mixed gas of the breathing system of a patient enters the safety valve 10 from the main air passage of the breathing machine, one gas enters the breathing system of the patient through the inspiration branch, and the other gas enters the purging pipe 30 from the first side flow port 103, and the purging gas flow which is introduced into the sampling pipeline 20 is ensured to be small enough under the action of the gas barrier 40, so that the influence of the purging gas flow on the pressure measurement result of the first pressure sensor communicated with the sampling pipeline 20 is negligible, the pressure detection result of the first pressure sensor is effectively prevented from being influenced, meanwhile, the condensation accumulation of water vapor entering the first pressure sensor is prevented, the damage of the first pressure sensor and the deviation of pressure monitoring are prevented, and the breathing machine is controlled more accurately.

It should be noted that the purge flow in the purge tube 30 comes from the safety valve 10 without adding an additional pressure regulating valve and a separate air source, thereby effectively reducing the cost of the ventilator.

In the present embodiment, the air resistor 40 is made of metal powder such as stainless steel, copper, or titanium through a sintering process. It can be specifically understood that the air resistor 40 is disposed in the purge tube, so that an air flow gap is formed between the outer wall of the air resistor 40 and the inner wall of the purge tube 30, and thus, air flowing into the purge tube 30 from the first bypass port 103 can enter the sampling tube to be purged at a fixed flow through the air flow gap, so that a larger fixed air resistor can be obtained, and the use requirement is met.

As a first preferred embodiment of the utility model, it may also have the following additional technical features:

the gas circuit system of the ventilator of the present utility model further comprises a first T-joint 21 through which the purge tube 30 communicates with the sampling circuit 20. Specifically, the sampling line 20 includes a first sampling tube 201 and a second sampling tube 202, one ends of the first sampling tube 201 and the second sampling tube 202 are respectively communicated with the sampling line 20 and the first pressure sensor, a first interface and a second interface of the first T-joint 21 are respectively communicated with the other ends of the first sampling tube 201 and the second sampling tube 202, and a third interface of the first T-joint 21 is communicated with the purge tube 30. In this way, the air flow in the purging pipe 30 is split after entering the sampling pipeline 20, one purges the water vapor between the first T-shaped joint 21 and the breathing gas branch, and the other purges the water vapor stored between the first T-shaped joint 21 and the first pressure sensor, so that the water vapor is further prevented from entering the first pressure sensor to be condensed and accumulated. It can be seen that a purge flow is provided between the first pressure sensor and the sampling line 20 to block moisture from the suction line into the sampling line 20 from entering the first pressure sensor.

It should be noted that, because the flow rate of the purge gas flowing into the sampling pipe 20 is sufficiently small under the air blocking effect of the air blocking member 40, when the water vapor existing between the first T-shaped connector 21 and the first pressure sensor is purged, the water vapor is not blown into the first pressure sensor.

In this embodiment, the air blocking member 40 is disposed near one end of the first T-shaped joint 21, so that the air flow entering the purge tube 30 from the first bypass port 103 can be ensured, and the normal flow of the air flow is ensured to pass through the air blocking member 40 before reaching the first T-shaped joint 21, so that the air blocking member 40 can control the air flow to enter the sampling pipeline 20 at a stable and fixed output flow.

In this embodiment, the sampling pipeline 20 further includes a main sampling pipe, one end of the second sampling pipe 202 facing away from the first sampling pipe 201 is provided with a sampling connector 2011, and the sampling connector 2011 is communicated with the air suction branch through the main sampling pipe, so that the layout of the sampling pipeline 20 can be facilitated, and meanwhile, the main sampling pipe and the second sampling pipe 202 can be conveniently connected by the sampling connector 2011.

The gas pipeline system of the breathing machine further comprises a pressure detection pipeline 50, one end of the pressure detection pipeline 50 is communicated with the safety valve 10, and the other end of the pressure detection pipeline 50 is connected with a second pressure sensor for detecting the pressure in the main air passage of the breathing machine, namely, the pressure of the breathing machine is detected through the second pressure sensor. When the second pressure sensor detects that the pressure of the gas entering the safety valve 10 is higher than the set upper limit of the pressure of the gas, the safety valve 10 starts to release pressure, so that the safety valve plays a role in safety protection, and ensures that the pressure of the gas is conveyed into the respiratory system of a patient in a normal range, thereby avoiding the pressure injury of the patient caused by the overhigh pressure of the gas.

In this embodiment, the purge pipe 30 is connected to the first bypass port 103 through the pressure detection pipe 50, that is, one end of the pressure detection pipe 50 is connected to the first bypass port 103, the other end is connected to the second pressure sensor, and one end of the purge pipe 30 facing away from the sampling pipe 20 is connected to the pressure detection pipe 50, and the connection position of the purge pipe 30 and the pressure detection pipe 50 is located between the opposite ends of the pressure detection pipe 50, so as to facilitate the layout of the gas pipe system.

The gas circuit system of the ventilator of the present utility model further includes a second T-joint 51 through which the pressure detection circuit 50 communicates with the purge tube 30. Specifically, the pressure detecting pipe 50 includes a first detecting pipe 501 and a second detecting pipe 502, one ends of the first detecting pipe 501 and the second detecting pipe 502 are respectively connected and communicated with the first bypass port 103 and the second pressure sensor, a first interface and a second interface of the second T-joint 51 are respectively connected and fixed with one ends of the first detecting pipe 501 and the second detecting pipe 502, and a third interface of the second T-joint 51 is connected and communicated with the purge pipe 30. Thus, the gas is split after entering the pressure detection pipeline 50 from the first bypass 103 of the safety valve 10, one flow flows to the second pressure sensor, the pressure of the breathing machine is detected by the second pressure sensor, and the other flow flows to the purge pipe 30 and then enters the sampling pipeline 20 for purging at a stable and fixed output flow rate through the air resistor 40.

The gas pipeline system of the breathing machine further comprises a zero calibrating valve 60, wherein the zero calibrating valve 60 is arranged between the pressure detection pipeline 50 and the first pressure sensor and is used for calibrating zero of the first pressure sensor; the zeroing valve 60 is further disposed on the sampling pipeline 20 and connected to the second pressure sensor, and is further used for zeroing the second pressure sensor. It will be appreciated that the end of the second detection tube 502 facing away from the first detection tube 501 is connected to the zeroing valve 60, the end of the second sampling tube 202 facing away from the first sampling tube 201 is also connected to the zeroing valve 60, and the first sensor and the second sensor are also connected to the zeroing valve 60. From this, the air flow in the second detection tube 502 goes to the second pressure sensor after passing through the zero calibration valve 60; the air flow in the second sampling tube 202 goes to the first pressure sensor after passing through the zero calibration valve 60, and the zero calibration valve 60 performs timing zero calibration on the first pressure sensor and the second pressure sensor, so that the measurement data error is avoided from being overlarge due to zero drift of the first pressure sensor and the second pressure sensor.

In this embodiment, each pipe in the pressure detection pipe 50 and/or the sampling pipe 20 is a silicone pipe. It will be appreciated in particular that the first sampling tube 201, the second sampling tube 202, the main sampling tube, the first detection tube 501, the second detection tube 502, and the purge tube 30 are all silicone tubes, which are convenient for use in connecting interfaces and joints in series to deliver a flow of gas.

Embodiment two:

the difference between this embodiment and the first embodiment is that: the purge pipe 30 communicates with the relief valve 10 in a different manner.

Referring to fig. 3, the safety valve 10 is further provided with a second bypass port 104, one end of the purge tube 30 facing away from the sampling tube 20 is communicated with the safety valve 10 through the second bypass port 104, and the pressure detection tube 50 is communicated with the safety valve 10 through the first bypass port 103, so that after the gas in the main air passage of the breathing machine enters the safety valve 10, a part of the gas enters the breathing system of the patient, a part of the gas enters the pressure detection tube 50 through the first bypass port 103 to go to the second pressure sensor, and a part of the gas enters the purge tube 30 through the second bypass port 104 to enter the sampling tube 20 for purging, so that the influence on the pressure detection result of the first pressure sensor can be effectively avoided, meanwhile, the condensation accumulation of the water vapor entering the first pressure sensor is avoided, the damage of the first pressure sensor is prevented, the deviation of the pressure monitoring is avoided, and the breathing machine is controlled more accurately.

The above additional technical features can be freely combined and superimposed by a person skilled in the art without conflict.

The foregoing is only a preferred embodiment of the present utility model, and all technical solutions for achieving the object of the present utility model by substantially the same means are within the scope of the present utility model.

Claims (10)

1. The utility model provides a gas piping system of breathing machine, includes relief valve (10) and sampling pipeline (20), be provided with inlet connection (101) and outlet connection (102) on relief valve (10), inlet connection (101) are used for the main air flue intercommunication with the breathing machine, outlet connection (102) are used for the branch road of breathing in of intercommunication breathing machine, sampling pipeline (20) with the branch road intercommunication of breathing in and access the first pressure sensor that is used for detecting patient end suction pressure on the breathing machine, a serial communication port, still be provided with first side stream mouth (103) on relief valve (10), first side stream mouth (103) with the intercommunication has purge tube (30) between sampling pipeline (20), be provided with air resistor (40) in purge tube (30), air resistor (40) are used for controlling the air current in purge tube (30) lets in with fixed flow in sampling pipeline (20).

2. The gas pipeline system of a respirator according to claim 1, further comprising a first T-joint (21), wherein the sampling pipeline (20) comprises a first branching pipe (201) and a second branching pipe (202), wherein a first interface and a second interface of the first T-joint (21) are respectively connected and fixed with one ends of the first branching pipe (201) and the second branching pipe (202), and the other ends of the first branching pipe (201) and the second branching pipe (202) are respectively communicated with the sampling pipeline (20) and the first pressure sensor, and a third interface of the first T-joint (21) is communicated with the purge pipe (30).

3. The gas circuit system of a ventilator according to claim 2, wherein the gas barrier (40) is provided near one end of the first T-joint (21).

4. The gas line system of a ventilator according to claim 2, characterized in that the sampling line (20) further comprises a main sampling tube, the end of the second sampling tube (202) facing away from the first sampling tube (201) is provided with a sampling nipple (2011), the sampling nipple (2011) being in communication with the inspiratory limb via the main sampling tube.

5. The gas line system of a ventilator according to claim 1, further comprising a pressure detection line (50), wherein one end of the pressure detection line (50) is in communication with the safety valve (10), and a second pressure sensor for detecting the pressure in the main airway is connected to the other end.

6. The gas line system of a ventilator according to claim 5, characterized in that the purge tube (30) communicates with the first bypass port (103) through the pressure detection line (50).

7. The gas pipeline system of a breathing machine according to claim 5, further comprising a second T-shaped joint (51), wherein the pressure detection pipeline (50) comprises a first detection pipe (501) and a second detection pipe (502), a first interface and a second interface of the second T-shaped joint (51) are respectively connected and fixed with one ends of the first detection pipe (501) and the second detection pipe (502), the other ends of the first detection pipe (501) and the second detection pipe (502) are respectively connected and communicated with the first bypass port (103) and the second pressure sensor, and a third interface of the second T-shaped joint (51) is communicated with the purge pipe (30).

8. The gas circuit system of claim 5, further comprising a zeroing valve (60), wherein the zeroing valve (60) is disposed between the pressure detection circuit (50) and the first pressure sensor, and wherein the zeroing valve (60) is configured to zero the first pressure sensor.

9. The gas circuit system of a ventilator according to claim 8, wherein the zeroing valve (60) is further provided in the sampling line (20) and connected to the second pressure sensor, the zeroing valve (60) being further configured to zero the second pressure sensor.

10. The gas line system of a ventilator according to claim 5, characterized in that each tube in the pressure detection line (50) and/or the sampling line (20) is a silicone tube.