CN219764217U - Breathing tube device and breathing equipment - Google Patents

Abstract

The utility model is applicable to the technical field of breathing equipment, and provides a breathing tube device and breathing equipment, wherein the breathing tube device comprises: the plug connector comprises a pressure release channel and a breathing channel; the pressure relief assembly is arranged on the plug connector and comprises a shell, a sealing element and a limiting element, wherein the shell is arranged on the plug connector, an exhaust channel is arranged in the shell, and the other end of the exhaust channel is communicated with the outside; the limiting piece is arranged on one side of the sealing piece, which is away from the pressure relief channel; the sealing element is in sealing contact with the inner wall of the exhaust channel, and can move along the direction deviating from the pressure release channel by being pushed by air flow and is in contact with the limiting element, so that the sealing element is deformed and is arranged at intervals with the inner wall of the exhaust channel; a breathing apparatus, comprising: is characterized by comprising a breathing tube device and a breathing machine; the utility model realizes the control of the internal pressure of the breathing tube through the sealing element and the limiting element, has simple structure, lighter weight and low cost compared with a complex pipeline.

Description

Breathing tube device and breathing equipment

Technical Field

The utility model belongs to the technical field of breathing equipment, and particularly relates to a breathing tube device and breathing equipment.

Background

In the medical field, patients with poor breathing need to breathe with a ventilator, which is usually connected to a ventilator or nebulizer in order to treat the patient. However, since both the patient's incoming and outgoing calls are made near the patient end of the breathing tube, the breathing tube lacks effective monitoring and release of gas flow or pressure at the closest patient end. When in use, the pressure in the pipeline is easily increased by inhaling or exhaling the gas, so that the conditions of dyspnea, carbon dioxide increase and the like of a patient are easily caused.

Currently, some breathing tubes with breathing valves exist, but the breathing tubes generally manage exhalation and inhalation respectively through a plurality of tubules, and the breathing tubes are complex in structure, heavy in weight, inconvenient to use and high in cost.

Disclosure of Invention

In view of the above problems, the utility model provides a breathing tube device and breathing equipment, which at least solve the problem that the prior breathing tube cannot adjust the pressure in a pipeline close to a patient end.

An embodiment of the present utility model provides a breathing tube device, comprising:

the connector is internally provided with a pressure release channel and a breathing channel which are communicated with each other;

the pressure relief assembly comprises a shell arranged on the plug connector, a sealing element and a limiting element which are arranged in the shell, wherein an exhaust channel is arranged in the shell, one end of the exhaust channel can be communicated with the pressure relief channel, and the other end of the exhaust channel is communicated with the outside;

the limiting piece is arranged on one side, away from the pressure relief channel, of the sealing piece;

the periphery of the sealing element is in sealing contact with the inner wall of the exhaust channel, and the sealing element can move along the direction deviating from the pressure release channel and is in contact with the limiting element by being pushed by air flow, so that the sealing element is deformed and is arranged with the inner wall of the exhaust channel at intervals.

In an embodiment, the housing is disposed in the plug connector, the housing includes a bottom wall and a side wall connected to the bottom wall, a first through hole is formed in the bottom wall, the side wall encloses the exhaust channel, and the exhaust channel is communicated with the pressure release channel through the first through hole.

In an embodiment, the inner diameter of the first through hole is smaller than the inner diameter of the exhaust channel, and the sealing member can be in sealing abutting connection with one side of the bottom wall, which faces away from the pressure release channel.

In an embodiment, the limiting member includes a connecting portion and a limiting portion connected to the connecting portion, and one end of the connecting portion facing away from the limiting portion is connected to the housing.

In an embodiment, the sealing member is provided with a second through hole, and the connecting part penetrates through the second through hole and is in sealing contact with the inner wall of the second through hole;

the width of one end of the limiting part, which is close to the connecting part, is larger than the inner diameter of the second through hole.

In an embodiment, the diameter of the connection portion increases gradually in a direction away from the pressure relief channel.

In one embodiment, the seal is made of a soft gel material.

In an embodiment, the breathing channel comprises a middle cavity, an air inlet channel and an air outlet channel which are arranged in the plug connector, and the pressure relief channel, the air inlet channel and the air outlet channel are all communicated with the middle cavity.

In an embodiment, the breathing tube device further comprises a mouthpiece arranged on the plug connector, a large-diameter channel and a small-diameter channel which are mutually communicated are arranged in the mouthpiece, the inner diameter of the large-diameter channel is larger than that of the small-diameter channel, the large-diameter channel is communicated with the air outlet channel, and the small-diameter channel is communicated with the outside.

In an embodiment, the breathing tube device further comprises a breathing hose, one end of the breathing hose is connected to the plug connector, and the breathing hose is communicated with the air inlet channel.

The embodiment of the utility model also provides breathing equipment, which comprises:

the breathing tube device; and

and the breathing machine comprises an air outlet end connected with the plug connector.

The utility model makes an improved design aiming at the problem that the prior breathing tube cannot adjust the pressure in a pipeline close to a patient end, realizes the sealing of an exhaust channel by arranging the sealing element, limits the movement of the sealing element by arranging the limiting element, and enables the sealing element to deform when being pushed by air flow, so that the sealing element cannot continuously seal the exhaust channel when the internal pressure of the plug-in element is high, and cannot push the sealing element to deform if the internal pressure of the breathing tube is low, namely, the opening and closing of the exhaust channel are realized by the deformation of the sealing element, so as to realize the control of the internal pressure of the breathing tube device;

the utility model realizes the control of the internal pressure of the breathing tube only through the sealing element and the limiting element, has simple structure, lighter weight compared with a complex pipeline, low cost and strong practicability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic front view of a breathing tube device according to an embodiment of the present utility model.

Fig. 2 is a schematic perspective view of the breathing tube apparatus shown in fig. 1.

Figure 3 is a schematic cross-sectional view of the breathing tube device shown in figure 1.

Fig. 4 is a perspective view of the pressure relief assembly shown in fig. 1.

Fig. 5 is a schematic cross-sectional view of the pressure relief assembly shown in fig. 4.

Fig. 6 is a schematic perspective view of the housing and the limiting member in the pressure relief assembly shown in fig. 4.

Fig. 7 is a schematic perspective view of a seal in the pressure relief assembly of fig. 4.

Fig. 8 is a schematic perspective view of a mouthpiece of the breathing tube device of fig. 1.

Fig. 9 is a schematic cross-sectional view of the mouthpiece of fig. 8.

Fig. 10 is a schematic view of a breathing apparatus according to another embodiment of the present utility model.

The meaning of the labels in the figures is:

100. a breathing tube device;

10. a plug-in component; 101. a pressure relief channel; 102. a breathing passage; 1021. an intermediate chamber; 1022. an air intake passage; 1023. an air outlet channel;

20. a pressure relief assembly; 201. an exhaust passage; 21. a housing; 211. a bottom wall; 2111. a first through hole; 212. a sidewall; 22. a seal; 221. a second through hole; 23. a limiting piece; 231. a connection part; 232. a limit part;

30. a mouthpiece; 301. a large diameter channel; 302. a small diameter channel;

40. a breathing hose;

200. a breathing apparatus;

50. and an air outlet end.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail below with reference to the accompanying drawings, i.e., embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the medical field, patients with poor breathing need to breathe with a ventilator, which is usually connected to a ventilator or nebulizer in order to treat the patient. However, since both the patient's incoming and outgoing calls are made near the patient end of the breathing tube, the breathing tube lacks effective monitoring and release of gas flow or pressure at the closest patient end. When in use, the pressure in the pipeline is easily increased by inhaling or exhaling the gas, so that the conditions of dyspnea, carbon dioxide increase and the like of a patient are easily caused.

Currently, some breathing tubes with breathing valves exist, but the breathing tubes generally manage exhalation and inhalation respectively through a plurality of tubules, and the breathing tubes are complex in structure, heavy in weight, inconvenient to use and high in cost.

Therefore, the breathing tube device and the breathing equipment provided by the utility model realize the sealing of the exhaust channel by arranging the sealing element, limit the movement of the sealing element by arranging the limiting element, and enable the sealing element to deform when being pushed by airflow, so that the sealing element can not continuously seal the exhaust channel, and if the internal pressure of the breathing tube is smaller, the sealing element can not be pushed to deform, namely, the opening and closing of the exhaust channel are realized by the deformation of the sealing element, and the internal pressure of the breathing tube device is controlled.

In order to describe the technical scheme of the utility model, the following description is made with reference to specific drawings and embodiments.

Referring to fig. 1-3, a first aspect of the present utility model provides a breathing tube apparatus 100, the breathing tube apparatus 100 being applicable to a ventilator or other breathing apparatus, the ventilator being an example of this embodiment; the breathing tube device 100 includes a plug 10 and a pressure relief assembly 20.

The connector 10 is used for being connected with a breathing machine, the breathing machine can convey oxygen to a user through the connector 10, specifically, a breathing channel 102 is formed in the connector 10, one end of the breathing channel 102 is used for being connected with the breathing machine, and oxygen can be conveyed to the user through the other end of the breathing channel 102; the pressure release channel 101 is further formed in the plug connector 10, the pressure release channel 101 is communicated with the breathing channel 102, the pressure release channel 101 is used for exhausting gas so as to prevent the excessive internal pressure of the breathing channel 102 of the plug connector 10, thereby improving the condition that the excessive internal pressure of the plug connector 10 affects breathing, specifically, oxygen released by a breathing machine can enter the pressure release channel 101 through the breathing channel 102 in the plug connector 10 and be discharged to the outside, and waste gas exhaled by a user can enter the pressure release channel 101 through the breathing channel 102 and be discharged to the outside.

Referring to fig. 4 and 5, the pressure release assembly 20 includes a housing 21, and a sealing member 22 and a limiting member 23 disposed in the housing 21, wherein the housing 21 is disposed on the plug 10, an exhaust passage 201 is disposed in the housing 21, one end of the exhaust passage 201 is in communication with the pressure release passage 101, and the other end of the exhaust passage 201 is in communication with the outside, so that the gas in the breathing passage 102 can be discharged to the outside through the pressure release passage 101 and the exhaust passage 201.

The limiting member 23 is disposed on a side of the sealing member 22 away from the pressure relief channel 101, and the limiting member 23 may be connected to an inner wall of the exhaust channel 201, and also connected to other positions of the housing 21 through other structural members.

The peripheral side of the sealing member 22 is in sealing contact with the inner wall of the exhaust channel 201, at this time, the sealing member 22 can seal and isolate the exhaust channel 201, gas in the pressure release channel 101 cannot be discharged to the outside through the exhaust channel 201, and external gas cannot enter the pressure release channel 101 through the exhaust channel 201; when the air pressure in the pressure release channel 101 is higher, the sealing element 22 can move along the direction away from the pressure release channel 101 by being pushed by air flow and is propped against the limiting element 23, specifically, before the sealing element 22 contacts the limiting element 23, the sealing element 22 moves towards the direction close to the limiting element 23, but the peripheral side of the sealing element 22 is always propped against the inner wall of the air release channel 201, namely, in the process, the air release channel 201 is always sealed by the sealing element 22, when the sealing element 22 is propped against the limiting element 23, under the action of air flow, the sealing element 22 can be deformed and arranged at intervals with the inner wall of the air release channel 201, specifically, when the sealing element 22 is propped against the limiting element 23, the air flow continuously applies pressure to the sealing element 22, under the action of the limiting element 23, the sealing element 22 cannot continuously move, so that the part of the sealing element 22, which is not contacted with the limiting element 23, is deformed towards the direction away from the air flow, at the peripheral side of the air release channel 201 is always separated from the inner wall of the air release channel 201, so that the air flow can be discharged to the outside through the interval, and the air flow can be discharged to the outside, and the air flow can not seal the air release channel 201 by the sealing element 22; after the air pressure in the pressure release passage 101 decreases, the seal member 22 moves in a direction away from the stopper 23 and returns to the original state, the peripheral side of the seal member 22 is again sealed against the inner wall of the exhaust passage 201, and the seal member 22 seals and closes the exhaust passage 201.

In this embodiment, the pressure relief assembly 20 is used for controlling the air pressure in the breathing channel 102 of the connector 10, when the air pressure in the breathing channel 102 is greater than a preset value, the pressure relief assembly 20 can be opened to allow the air in the breathing channel 102 to be discharged to the outside through the pressure relief channel 101, so as to reduce the air pressure in the breathing channel 102, thereby improving the situation that the air pressure in the breathing channel 102 is too high to affect the breathing of the user.

It can be appreciated that the pressure relief assembly 20 may be disposed on top of the plug 10 or within the plug 10, in some embodiments, the pressure relief assembly 20 is disposed within the plug 10, the housing 21 is accommodated in the pressure relief channel 101, and a seal is disposed between an outer wall of the housing 21 and an inner wall of the pressure relief channel 101, so that an air flow in the pressure relief channel 101 can only be discharged to the outside through the air discharge channel 201, but not discharged to the outside from between the inner wall of the pressure relief channel 101 and the outer wall of the housing 21; in other embodiments, the pressure relief assembly 20 is disposed at the top of the plug 10, and the housing 21 is disposed at an end facing away from the pressure relief channel 101 and is in sealing connection with the plug 10, so that the air flow in the pressure relief channel 101 can only be discharged to the outside through the air discharge channel 201, but not discharged to the outside from between the pressure relief channel 101 and the housing 21.

In this embodiment, the sealing member 22 can slide in the exhaust channel 201 under the action of the air flow and cannot turn over, specifically, a guide groove or a guide post structure may be disposed in the exhaust channel 201 to avoid turning over of the sealing member 22, and the thickness of the sealing member 22 may be increased or other structures may be adopted to avoid turning over of the sealing member 22.

It will be appreciated that the airflow pressure required to deform the seal 22 is affected by the material, thickness, etc. of the seal 22, while the airflow pressure required to push the seal 22 into motion is affected by the friction between the seal 22 and the inner wall of the exhaust channel 201, so that the airflow pressure that can deform the seal 22 can be controlled by changing the material of the seal 22, the thickness of the seal 22, the friction between the seal 22 and the inner wall of the exhaust channel 201, etc. to achieve the effect of controlling the air pressure in the breathing channel 102.

The breathing tube device 100 provided by the embodiment of the utility model comprises a pressure release channel 101 and a breathing channel 102 which are communicated, so that the gas in the plug connector 10 can be discharged to the outside through the pressure release channel 101; the casing 21 is arranged in the pressure release channel 101, the exhaust channel 201 is arranged in the casing 21, the seal piece 22 is used for sealing the exhaust channel 201, and the adjustment of the internal air pressure of the plug connector 10 is realized through the limit piece 23 and the deformable seal piece 22, so that the influence on the use caused by the overlarge pressure in the breathing channel 102 is avoided.

Referring to fig. 3, in an embodiment, the respiratory passage 102 includes a middle chamber 1021, an air inlet passage 1022 and an air outlet passage 1023, the air inlet passage 1022, the air outlet passage 1023 and the pressure relief passage 101 are all communicated with the middle chamber 1021, the air inlet passage 1022 is opposite to the respirator, the air outlet passage 1023 is opposite to the user, oxygen released by the respirator can enter the air inlet passage 1022 and enter the air outlet passage 1023 after passing through the air inlet passage 1022 and the middle chamber 1021, meanwhile, part of oxygen also exists in the pressure relief passage 101, gas exhaled by the user can enter the middle chamber 1021 or remain in the air outlet passage 1023 through the air outlet passage 1023, when the air pressure inside the plug connector 10 is too high, the pressure relief assembly 20 is opened, and the gas in the middle chamber 1021 can be discharged to the air outlet passage 201 through the pressure relief passage 101.

In one embodiment, the seal 22 is made of a soft gel material that has good resistance to temperature, aging, chemicals, solvents, and is resilient and also facilitates the injection molding process.

Referring to fig. 4, 5 and 6, in an embodiment, the housing 21 includes a bottom wall 211 and a side wall 212 connected to the bottom wall 211, a first through hole 2111 is formed in the bottom wall 211, and the bottom wall 211 is used for carrying the sealing member 22, that is, when the air pressure in the breathing channel 102 of the plug 10 is low, the sealing member 22 abuts against one side of the bottom wall 211 facing away from the pressure release channel 101, so as to prevent the sealing member 22 from falling into the pressure release channel 101; the side wall 212 encloses the exhaust channel 201, the exhaust channel 201 being connectable to the pressure relief channel 101 via a first through hole 2111.

The casing 21 may be cylindrical and is in sealing fit with the inner wall of the pressure relief channel 101, but not limited thereto, and in other embodiments, the shape of the casing 21 may be square or other shapes, and the sealing between the casing 21 and the inner wall of the pressure relief channel 101 may be achieved by a sealing filler.

It will be appreciated that the cross-sectional shape of the vent passage 201 is the same as the shape of the bottom wall 211, and the shape of the bottom wall 211 may be circular, square or other, or the same as the cross-sectional shape of the pressure relief passage 101.

In some embodiments, the inner diameter of the first through hole 2111 is smaller than the inner diameter of the exhaust channel 201, so that the bottom wall 211 carries the seal 22, specifically, referring to fig. 5, the seal 22 is in sealing abutment with the side of the bottom wall 211 facing away from the pressure relief channel 101, that is, when the air pressure in the breathing channel 102 is low and the seal 22 abuts against the bottom wall 211, the sealing position of the seal 22 to the exhaust channel 201 includes between the seal 22 and the bottom wall 211 in addition to between the peripheral side of the seal 22 and the inner wall of the exhaust channel 201, so as to further enhance the sealing performance of the pressure relief assembly 20.

Referring to fig. 4, 5 and 6, in one embodiment, the limiting member 23 includes a connecting portion 231 and a limiting portion 232 connected to the connecting portion 231, one end of the connecting portion 231 is connected to the housing 21 and the other end is connected to the limiting portion 232, and the connecting portion 231 is used for providing support for the limiting portion 232, and specifically, one end of the connecting portion 231 connected to the housing 21 may be connected to an inner wall of the exhaust channel 201, or may be connected to the bottom wall 211 or other positions of the housing 21; the limiting portion 232 is used for limiting displacement of the sealing element 22, when the sealing element 22 abuts against the limiting member 23, the sealing element 22 substantially abuts against the limiting portion 232, and then the sealing element 22 is deformed along with continued stress of the sealing element 22.

Referring to fig. 5 to 7, in some embodiments, the sealing member 22 is provided with a second through hole 221, and the connection portion 231 penetrates the second through hole 221 and is in sealing contact with the inner wall of the second through hole 221, so that the sealing member 22 can slide along the connection portion 231, while also ensuring sealing performance with respect to the exhaust passage 201 during sliding.

The width of the end of the limiting portion 232, which is close to the connecting portion 231, is larger than the inner diameter of the second through hole 221, and the sealing element 22 cannot be separated from the connecting portion 231 due to the arrangement, and meanwhile, when the sealing element 22 abuts against the limiting portion 232, the sealing element 22 can deform under the action of the limiting portion 232 and the airflow pressure.

It will be appreciated that since the seal 22 is required to slide along the exhaust passage 201, the direction of extension of the connection portion 231 is the same as the direction of extension of the exhaust passage 201.

In this embodiment, one end of the connecting portion 231 passes through the second through hole 221 and is connected to the bottom wall 211.

In this embodiment, due to the arrangement of the connection portion 231 and the second through hole 221, the connection portion 231 also has a guiding function, and the sealing member 22 cannot be turned over due to air pressure, so that the sealing member 22 does not need to have a thicker thickness to avoid turning over, and the thickness of the sealing member 22 can be designed according to requirements.

Referring to fig. 5, in some embodiments, the diameter of the connection 231 increases gradually in a direction away from the pressure relief channel 101, which is also the direction in which the seal 22 is moved by the pressure of the air flow; it will be appreciated that, to ensure the sealing performance of the sealing member 22, the inner wall of the second through hole 221 is also in sealing contact with the connecting portion 231 when the sealing member 22 contacts the bottom wall 211.

In this embodiment, as the sealing member 22 gradually moves towards the direction approaching the limiting portion 232 under the action of the airflow pressure, the friction force between the inner wall of the second through hole 221 and the connecting portion 231 is larger and larger, that is, the air pressure required by the sealing member 22 moving to abut against the limiting portion 232 can be adjusted by adjusting the change rate of the diameter of the connecting portion 231, so as to achieve the effect of assisting in controlling the air pressure in the breathing channel 102.

Referring to fig. 8 and 9, in one embodiment, the breathing tube apparatus 100 further includes a mouthpiece 30, the mouthpiece 30 being disposed on the connector 10, the mouthpiece 30 being capable of facilitating the inhalation by a user of oxygen expelled from the air outlet channel 1023; the mouthpiece 30 is provided with a large-diameter channel 301 and a small-diameter channel 302 which are mutually communicated, the inner diameter of the large-diameter channel 301 is larger than that of the small-diameter channel 302, the large-diameter channel 301 is communicated with an air outlet channel 1023, the small-diameter channel 302 is communicated with the outside, and when a user uses the breathing tube device 100, the small-diameter channel 302 is opposite to the user, and the arrangement can reduce the air pressure of the air flow discharged to the user through the small-diameter channel 302 so as to avoid discomfort of the user caused by overlarge air flow pressure.

Referring to fig. 1 to 3, in an embodiment, the breathing tube apparatus 100 further includes a breathing hose 40, one end of the breathing hose 40 is connected to the connector 10, and the other end is connected to the ventilator, the breathing hose 40 is connected to the air intake passage 1022, and the connector 10 is connected to the ventilator through the breathing hose 40 because the connector 10 needs to be disposed close to the user, so that the user can use the connector 10 at various positions.

The breathing hose 40 may be a bellows or other flexible hose, and the material of the breathing hose 40 may be polyvinyl chloride (Polyvinyl chloride, PVC), silicone or other flexible material.

The breathing tube device 100 provided in the first aspect of the present utility model comprises the following steps: when the air flow pressure in the middle cavity 1021 is greater than a preset value, the air flow in the pressure release channel 101 can push the sealing element 22 to move in the direction away from the pressure release channel 101 and close to the limiting part 232, the friction force between the inner wall of the second through hole 221 and the connecting part 231 is gradually increased along with the movement of the sealing element 22, and the sealing element 22 is gradually close to the limiting part 232 along with the increase of the air flow pressure; when the sealing member 22 abuts against the limiting portion 232, the sealing member 22 deforms under the action of the air flow pressure, at this time, the peripheral side of the sealing member 22 is separated from the inner wall of the air discharge channel 201, a space is formed between the sealing member 22 and the inner wall of the air discharge channel 201, and the air flow can be discharged to the outside through the space, so that the air pressure in the middle chamber 1021 is reduced.

Referring to fig. 3 and 10, a second aspect of the present utility model provides a breathing apparatus 200 comprising a ventilator and a breathing tube device 100 provided by the first aspect of the present utility model, wherein the ventilator comprises an outlet port 50 connected to a connector 10, and the ventilator inputs gas into the connector 10 through the outlet port 50.

Specifically, the outlet end 50 is connected to the connector 10 by the breathing tube 40 so that the outlet end 50 communicates with the inlet passage 1022 of the connector 10.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.

Claims (10)

1. A breathing tube apparatus, comprising:

the connector is internally provided with a pressure release channel and a breathing channel which are communicated with each other;

the pressure relief assembly comprises a shell arranged on the plug connector, a sealing element and a limiting element which are arranged in the shell, wherein an exhaust channel is arranged in the shell, one end of the exhaust channel can be communicated with the pressure relief channel, and the other end of the exhaust channel is communicated with the outside;

the limiting piece is arranged on one side, away from the pressure relief channel, of the sealing piece;

the periphery of the sealing element is in sealing contact with the inner wall of the exhaust channel, and the sealing element can move along the direction deviating from the pressure release channel and is in contact with the limiting element by being pushed by air flow, so that the sealing element is deformed and is arranged with the inner wall of the exhaust channel at intervals.

2. The breathing tube device of claim 1 wherein the housing is disposed within the plug, the housing includes a bottom wall and a side wall connected to the bottom wall, the bottom wall has a first through hole formed therein, the side wall encloses the exhaust passage, and the exhaust passage is in communication with the pressure relief passage through the first through hole.

3. The breathing tube device of claim 2 wherein the first through bore has an inner diameter less than an inner diameter of the vent passage and the seal seals against a side of the bottom wall facing away from the pressure relief passage.

4. The breathing tube device of claim 1 wherein the limiter comprises a connecting portion and a limiter portion connected to the connecting portion, an end of the connecting portion facing away from the limiter portion being connected to the housing.

5. The breathing tube device of claim 4 wherein the sealing member defines a second through hole, the connecting portion extending through the second through hole and sealing against an inner wall of the second through hole;

the width of one end of the limiting part, which is close to the connecting part, is larger than the inner diameter of the second through hole.

6. The breathing tube device of claim 5 wherein the diameter of the connection portion increases gradually in a direction away from the pressure relief channel.

7. The breathing tube device of any one of claims 1-6 wherein the breathing passage comprises an intermediate chamber, an inlet passage, and an outlet passage opening into the plug, the pressure relief passage, the inlet passage, and the outlet passage all communicating with the intermediate chamber.

8. The breathing tube device of claim 7 further comprising a mouthpiece disposed on the plug, wherein a large diameter channel and a small diameter channel are disposed in the mouthpiece in communication with each other, wherein the inner diameter of the large diameter channel is greater than the inner diameter of the small diameter channel, wherein the large diameter channel is in communication with the air outlet channel, and wherein the small diameter channel is in communication with the outside.

9. The breathing tube device of claim 7 further comprising a breathing hose, one end of the breathing hose being connected to the connector and the breathing hose being in communication with the air inlet passage.

10. A breathing apparatus, comprising:

the breathing tube device of any one of claims 1-9; and

and the breathing machine comprises an air outlet end connected with the plug connector.