Circulating air supply type breathing system for shield cutter replacement

Abstract

The invention provides a circulating air supply type breathing system for shield cutter changing, which comprises a main body of a closed structure, and the main body comprises an inspiration chamber, a filtering device and an expiration chamber which are sequentially communicated; an inspiration air bag capable of stretching out and drawing back in the axial direction of the inspiration cavity is arranged in the inspiration cavity, and an expiration air bag capable of stretching out and drawing back in the axial direction of the expiration cavity is arranged in the expiration cavity. The breathing mask is respectively communicated with the inspiration air bag and the expiration air bag through an inspiration pipeline and an expiration pipeline; the air supply port is communicated with the air suction air bag; and the one-way valves are arranged in the inspiration pipeline, the expiration pipeline, the bottom of the inspiration air bag, the bottom of the expiration air bag, the expiration cavity, the air supply port and between the filtering device and the inspiration cavity. The device is simple in structure and low in cost, exhaled air can be recycled, and the comfort and safety of operators can be improved.

Description

Technical Field

[0001] The present invention belongs to the field of respirators, and particularly relates to a circulating air supply type respiratory system applied to the shield field. Background Art

[0002] When working in a high-pressure environment, such as shield pressure-balanced tool changing operation, a respirator is a necessary device for workers to survive and work. The stability of the respirator performance is related to the physical health and working duration of the workers. Currently, the existing respirators basically discharge the inhaled oxygen (or mixed gas) directly into the air after inhalation, greatly reducing the utilization efficiency of the gas (especially oxygen).

[0003] The Chinese invention patent with the authorization announcement number CN108969857B discloses a fully automatic oxygen inhalation and oxygen discharge device, including an inhalation regulator, an exhalation regulator, an inhalation corrugated hose, an exhalation corrugated hose, a three-way pipe, an oxygen inhalation mask, an oxygen supply valve assembly, an oxygen discharge valve assembly, an inhalation bellows interface, and an exhalation bellows interface; among them, both the inhalation regulator and the exhalation regulator are horizontally placed cylinders; an oxygen supply valve assembly is installed on the upper left side inside the inhalation regulator, and an inhalation bellows interface is installed on the left side outside it; an oxygen discharge valve assembly is installed on the upper right side inside the exhalation regulator, and an exhalation bellows interface is installed on the right side outside it; one end of the inhalation corrugated hose is connected to the inhalation bellows interface, and the other end is connected to the left port of the three-way pipe; one end of the exhalation corrugated hose is connected to the exhalation bellows interface, and the other end is connected to the right port of the three-way pipe, and an oxygen inhalation mask is connected to the lower port of the three-way pipe; the upper part of the oxygen supply valve assembly is connected to an oxygen supply pipe, and the upper part of the oxygen discharge valve assembly is connected to an exhaust pipe. People inhale oxygen through the mask. During the inhalation process, oxygen can be automatically supplied according to the inhalation rhythm of the human body, that is, when the human body inhales, the valve seat of the oxygen supply valve assembly can be automatically opened along with the inhalation rhythm of the human body, and the oxygen supply amount can be automatically adjusted according to the size of the inhalation amount of the human body. When the inhalation stops, the valve seat can be automatically closed to stop the oxygen supply; during exhalation, oxygen can be automatically discharged according to the inhalation rhythm of the human body, that is, when the human body exhales, the oxygen discharge valve can be automatically opened along with the exhalation rhythm of the human body, and the oxygen discharge amount can be automatically adjusted according to the size of the exhalation amount of the human body. When the exhalation stops, the oxygen discharge valve can be automatically closed to stop the oxygen discharge. On the one hand, using the inhalation regulator to supply oxygen to patients saves three times the amount of oxygen used compared to the past; on the other hand, the exhalation regulator avoids the gas in the room being pumped out of the room, reduces the operating load of the vacuum negative pressure system equipment, and reduces the impact on the environmental temperature and humidity of the room. However, this method cannot recycle the exhaled gas, greatly reducing the utilization efficiency of oxygen.

[0004] The Chinese patent application with the publication number CN109078246A discloses an oxygen recycling oxygen inhalation device, which adopts the following scheme: it includes a transparent hood, a hood fixing ring, a latex neck sleeve, an exhalation hose, a box body, an expander, a gas circulation pipe, a sewage discharge knob, a gas driver, a dehumidifier, a carbon dioxide adsorber, a gas ejector, an auxiliary oxygen device, an oxygen pressure reducer, an oxygen flow regulator, and a return air hose; the transparent hood is cylindrical, its upper part is sealed, and its lower part is connected to the latex neck sleeve through the hood fixing ring, and the bottom of the latex neck sleeve is open; one end of the exhalation hose is installed on the left side of the transparent hood, and the other end is connected to the upper left side of the cuboid box body and is connected to the expander on the left side inside the box body; one end of the gas circulation pipe is connected to the bottom of the expander, and the other end is successively connected to the gas driver and the dehumidifier located at the bottom of the box body, and the right side of the dehumidifier is connected to the bottom of the carbon dioxide adsorber located on the right side of the box body through the gas circulation pipe; the bottom left side of the gas circulation pipe protrudes downward, and a sewage discharge knob located at the lower part outside the box body is installed on the protruding part; the gas ejector is installed above the inside of the carbon dioxide adsorber and extends to the top of the carbon dioxide adsorber; the auxiliary oxygen device is located between the expander and the carbon dioxide adsorber, the upper air outlet of the auxiliary oxygen device is connected to an oxygen flow regulator, an oxygen pressure reducer is installed above the oxygen flow regulator, and the outlet of the oxygen flow regulator is connected to the gas ejector inside the carbon dioxide adsorber through a pipeline; one end of the return air hose is connected to the upper right side of the box body and is connected to the gas ejector inside the box body, and the other end is connected to the right side of the transparent hood. The dehumidifier is filled with aluminum oxide. Although this technology can recycle the exhaled gas, its recycling adopts a motor-assisted method. Since the gas flow blown by the motor is not easy to control, on the one hand, it will cause discomfort to the human body, and on the other hand, it will also affect the stability of waste gas treatment. Summary of the Invention

[0005] To solve the problems existing in the prior art, the present invention provides a circulating air supply type respiratory system for shield tool changing, aiming to realize the recycling of gas with a simple structure and improve the physical comfort of operators.

[0006] As an aspect of the present invention, there is provided a circulating air supply type respiratory system for shield tool changing, including:

[0007] A main body with a closed structure, the main body includes an inhalation chamber and an exhalation chamber, and a filtering device arranged between the inhalation chamber and the exhalation chamber, the filtering device is respectively communicated with the inhalation chamber and the exhalation chamber; an inhalation airbag that can axially expand and contract along the inhalation chamber is arranged in the inhalation chamber, and an exhalation airbag that can axially expand and contract along the exhalation chamber is arranged in the exhalation chamber;

[0008] A breathing mask, the breathing mask is respectively communicated with the inhalation airbag and the exhalation airbag through an inhalation pipeline and an exhalation pipeline;

[0009] An air supply port, which is communicated with the inhalation airbag;

[0010] Wherein, a first one-way valve for allowing gas to flow towards the breathing mask is arranged in the inhalation pipeline, a second one-way valve for allowing gas to flow towards the exhalation airbag is arranged in the exhalation pipeline, a third one-way valve for allowing the gas in the inhalation chamber to flow towards the inhalation airbag is arranged at the bottom of the inhalation airbag, a fourth one-way valve for allowing the gas inside the exhalation airbag to flow towards the exhalation chamber is arranged at the bottom of the exhalation airbag, a fifth one-way valve for allowing gas to flow from the chamber to the outside of the chamber is arranged on the exhalation chamber, a sixth one-way valve for allowing gas to flow towards the inhalation airbag is arranged in the air supply port, and a seventh one-way valve for allowing gas to flow from the filtering device into the inhalation chamber is arranged between the filtering device and the inhalation chamber, and the pressure threshold of the seventh one-way valve is less than that of the fifth one-way valve.

[0011] As a preferred solution of the circulating air supply type respiratory system for shield cutter changing of the present invention, the main body of the sealed structure includes a frame and a cover body. One end of the inhalation chamber and the exhalation chamber has an opening, and the opening of the inhalation chamber and the exhalation chamber is sealed by covering the opening with the cover body; through holes for the inhalation pipeline, the exhalation pipeline and the air supply port to pass through respectively are arranged on the cover body.

[0012] As a preferred solution of the circulating air supply type respiratory system for shield cutter changing of the present invention, the pressure threshold of the seventh one-way valve is more than 0.2 bar smaller than that of the fifth one-way valve. Further, it is 0.2 - 0.5 bar.

[0013] As a preferred solution of the circulating air supply type respiratory system for shield cutter changing of the present invention, the seventh one-way valve for allowing gas to flow from the filtering device into the inhalation chamber arranged between the filtering device and the inhalation chamber is replaced with an eighth one-way valve for allowing gas to flow from the exhalation chamber into the filtering device arranged between the exhalation chamber and the filtering device, and the pressure threshold of the seventh one-way valve is less than that of the fifth one-way valve is replaced with the pressure threshold of the eighth one-way valve is less than that of the fifth one-way valve.

[0014] As a preferred solution of the circulating air supply type respiratory system for shield cutter changing of the present invention, the pressure threshold of the eighth one-way valve is more than 0.2 bar smaller than that of the fifth one-way valve. Further, it is smaller by 0.2 - 0.5 bar.

[0015] As a preferred solution of the circulating air supply type respiratory system for shield cutter changing of the present invention, the device further includes an eighth one-way valve for allowing gas to flow from the exhalation chamber into the filtering device, and the pressure threshold of the seventh one-way valve is less than that of the fifth one-way valve is replaced with the pressure threshold of the eighth one-way valve is less than that of the fifth one-way valve.

[0016] As a preferred embodiment of the cyclic air supply type respiratory system for shield cutter changing of the present invention, the pressure threshold of the eighth one-way valve is less than that of the fifth one-way valve by more than 0.2 bar, and further, it is 0.2 - 0.5 bar.

[0017] As a preferred embodiment of the cyclic air supply type respiratory system for shield cutter changing of the present invention, the first one-way valve is located at the end of the inhalation pipeline close to the breathing mask.

[0018] As a preferred embodiment of the cyclic air supply type respiratory system for shield cutter changing of the present invention, the second one-way valve is located at the end of the exhalation pipeline close to the exhalation airbag.

[0019] As a preferred embodiment of the cyclic air supply type respiratory system for shield cutter changing of the present invention, the fifth one-way valve is located at the bottom of the exhalation chamber.

[0020] As a preferred embodiment of the cyclic air supply type respiratory system for shield cutter changing of the present invention, the filtering device includes a carbon dioxide adsorber.

[0021] As a preferred embodiment of the cyclic air supply type respiratory system for shield cutter changing of the present invention, the device further includes a ninth one-way valve arranged at the end of the inhalation pipeline close to the inhalation airbag and enabling the gas to flow towards the breathing mask.

[0022] As a preferred embodiment of the cyclic air supply type respiratory system for shield cutter changing of the present invention, the cover body and the frame are sealed by means of bolt connection, and a sealing gasket is arranged on the bolt.

[0023] As a preferred embodiment of the cyclic air supply type respiratory system for shield cutter changing of the present invention, the filtering device is detachably arranged in the main body.

[0024] It should be noted that in the technical solution of the present invention, except for the relative threshold difference of the one-way valves defined above, the specific pressure thresholds of the one-way valves are not particularly limited. Those skilled in the art can select the common pressure thresholds of one-way valves in the art according to the size of the device, working requirements, etc. based on the need for gas conduction to achieve the purpose.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The device of the present invention realizes the recycling of exhaled gas by mechanical means with the help of the air pressure change in each chamber. The structure is simple, and the above-mentioned cycle and internal pressure regulation can be achieved through the setting of one-way valves. The cost is low and no external energy supply is required.

[0027] 2. The buffer function of the airbag in the present invention can ensure smooth and comfortable inhalation of the human body and also serve as a backup air storage for safe emergency operations in case of need. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic structural diagram of the circulating air supply type breathing device for shield cutter changing of the first structure of the present invention;

[0029] Figure 2 Schematic structural diagram of the circulating air supply type breathing device for shield cutter changing of the second structure of the present invention;

[0030] Wherein, 1 - inhalation chamber, 2 - filtering device, 3 - exhalation chamber, 4 - inhalation airbag, 5 - exhalation airbag, 6 - breathing mask, 7 - inhalation pipeline, 8 - exhalation pipeline, 9 - air inlet, 10 - first one-way valve, 11 - second one-way valve, 12 - third one-way valve, 13 - fourth one-way valve, 14 - fifth one-way valve, 15 - sixth one-way valve, 16 - seventh one-way valve, 17 - eighth one-way valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The technical solutions in the embodiments will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] See Figure 1 , a specific embodiment of the present invention provides a circulating air supply type breathing system for shield cutter changing, including:

[0033] A main body with a closed structure, the main body includes an inhalation chamber 1 and an exhalation chamber 3, and a filtering device 2 disposed between the inhalation chamber 1 and the exhalation chamber 3, the filtering device 2 is respectively communicated with the inhalation chamber 1 and the exhalation chamber 3; an inhalation airbag 4 that can axially expand and contract along the inhalation chamber is provided in the inhalation chamber 1, and an exhalation airbag 5 that can axially expand and contract along the exhalation chamber is provided in the exhalation chamber 2;

[0034] A breathing mask 6, the breathing mask 6 is respectively communicated with the inhalation airbag 4 and the exhalation airbag 5 through an inhalation pipeline 7 and an exhalation pipeline 8;

[0035] An air supply port 9, the air supply port 9 is communicated with the inhalation airbag 4, and is used for conveying the gas for the operator to inhale into the inhalation airbag;

[0036] Among them, a first one-way valve 10 that can make the gas flow towards the breathing mask 6 is arranged in the air intake pipe 7, a second one-way valve 11 that can make the gas flow towards the exhalation airbag 5 is arranged in the exhalation pipe 8, a third one-way valve 12 that makes the gas in the air intake chamber 1 flow towards the inhalation airbag 4 is arranged at the bottom of the inhalation airbag 4, a fourth one-way valve 13 that makes the gas inside the exhalation airbag 5 flow towards the exhalation chamber 2 is arranged at the bottom of the exhalation airbag 5, a fifth one-way valve 14 that can make the gas flow from inside the chamber to outside the chamber is arranged at the bottom of the exhalation chamber 3, a sixth one-way valve 15 for making the gas flow towards the inhalation airbag 4 is arranged in the air supply port 9, and a seventh one-way valve 16 for making the gas flow from the filtering device 2 into the inhalation chamber 1 is arranged between the filtering device 2 and the inhalation chamber 1. The pressure threshold of the seventh one-way valve 16 is less than that of the fifth one-way valve 14.

[0037] The working principle of this device is as follows: During use, the gas for the operator to inhale (such as oxygen or compressed air, a mixed gas of helium and oxygen) is transported into the inhalation airbag 4 through the air intake port 9. Under the action of air pressure, the inhalation airbag 4 will expand axially along the inhalation chamber 1, and the ventilated gas will flow along the air intake pipe towards the inhalation mask. When the gas pressure in the air intake pipe reaches the pressure threshold of the first one-way valve 10, the first one-way valve 10 conducts, and at this time, the gas enters the operator's body through the breathing mask. When the operator exhales, due to the first one-way valve 10 being arranged on the air intake pipe, the gas can only flow along the exhalation pipe 3 at this time. Similarly, when the gas pressure in the exhalation pipe 3 reaches the pressure threshold of the second one-way valve 11, the second one-way valve 11 conducts, and at this time, the gas enters the breathing airbag 5. The exhalation airbag 5 expands axially along the exhalation chamber 3 under the action of gas pressure. When the pressure in the exhalation airbag 5 reaches the pressure threshold of the fifth one-way valve 14, the fifth one-way valve 14 conducts, and the exhaled gas enters the exhalation chamber 3 and then enters the filtering device for filtering. Since the pressure threshold of the seventh one-way valve 16 is greater than that of the fifth one-way valve 14, the seventh one-way valve 16 will conduct preferentially under the action of gas pressure. At this time, the filtered gas enters the inhalation chamber 1. When the gas pressure in the inhalation chamber 1 reaches the pressure threshold of the third one-way valve 12, the third one-way valve 12 conducts, and the gas enters the inhalation airbag 4 and mixes with the gas transported through the air intake port 9, and then is cyclically inhaled by the operator. When the air pressure in the inhalation chamber 1 is too high, the seventh one-way valve 16 will close. As the air pressure in the exhalation chamber 3 further increases, the fifth one-way valve 14 conducts, and the excess gas is discharged through the fifth one-way valve 14. In the present invention, the two airbags are equivalent to two buffers. On the one hand, their function is to buffer the transported gas to improve the comfort of the operator's inhalation. On the other hand, they can be used as a temporary storage chamber for gas, and can be used as an emergency air source to ensure the operator can make emergency actions safely when the gas supply source is cut off.

[0038] SeeFigure 2 , in another specific embodiment of the present invention, the seventh one-way valve 16 is removed, and an eighth one-way valve 17 for allowing gas to flow from the exhalation chamber 3 into the filtering device 2 is provided between the exhalation chamber 3 and the filtering device 2. The pressure threshold of the eighth one-way valve 17 is less than that of the fifth one-way valve 14.

[0039] In another specific embodiment of the present invention, in order to better ensure that the seventh one-way valve 16 or the eighth one-way valve 17 can be preferentially conducted over the fifth one-way valve 14 to form an effective circulation of the exhaled gas, fully considering the relationship between the gas pressure and the gas volume in the device, the pressure threshold of the seventh one-way valve 16 or the eighth one-way valve 17 is set to be more than 0.2 bar lower than that of the fifth one-way valve 14. More preferably, it is more suitable to be 0.2 - 0.5 bar lower.

[0040] In another specific embodiment of the present invention, in order to better ensure the smooth and stable gas delivery, the first one-way valve 10 is located at the end of the inhalation pipeline 7 close to the breathing mask 6, the second one-way valve 11 is located at the end of the exhalation pipeline 8 close to the exhalation airbag 5, and the device further includes a ninth one-way valve (not shown in the figure) provided at the end of the inhalation pipeline close to the inhalation airbag for allowing gas to flow towards the breathing mask.

[0041] In another specific embodiment of the present invention, since the main component exhaled by the human body is carbon dioxide, the filtering device 2 includes a carbon dioxide adsorber. Further, for the convenience of replacement, the carbon dioxide adsorber is detachably arranged in the main body.

[0042] In another specific embodiment of the present invention, the tops of the inhalation airbag 4 and the exhalation airbag 5 are respectively connected to the tops of the inhalation chamber 1 and the exhalation chamber 3 and extend along the axial direction of the cavity towards the bottom of the cavity. The above connection method can be a fixed connection or a detachable connection.

[0043] In another specific embodiment of the present invention, for the convenience of cleaning, the main body with a closed structure includes a frame and a cover. The tops of the inhalation chamber 4 and the exhalation chamber 5 have openings, and the inhalation chamber 4 and the exhalation chamber 5 are hermetically covered by the cover to seal the openings; through holes for the inhalation pipeline 7 and the exhalation pipeline 11 to pass through respectively are provided on the cover, and the cover is fixed on the opening by bolts and sealing rings to seal the opening.

[0044] It should be noted that according to the above embodiments of the present invention, those skilled in the art can fully implement the entire scope of the independent claims and dependent claims of the present invention. The implementation process and method are the same as those of the above embodiments; and the parts not elaborated in detail in the present invention belong to the well-known technology in the art. However, the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those familiar with the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A cyclic air supply type respiratory system for shield tool changing, characterized in that, Comprising: A main body of a sealed structure, the main body including an inhalation chamber, a filtering device, and an exhalation chamber that are connected in sequence; an inhalation airbag that can axially expand and contract along the inhalation chamber is provided in the inhalation chamber, and an exhalation airbag that can axially expand and contract along the exhalation chamber is provided in the exhalation chamber; A breathing mask, the breathing mask being connected to the inhalation airbag and the exhalation airbag through an inhalation pipeline and an exhalation pipeline respectively; An air supply port, the air supply port being connected to the inhalation airbag; Wherein, a first one-way valve that can make the gas flow towards the breathing mask is provided in the inhalation pipeline, a second one-way valve that can make the gas flow towards the exhalation airbag is provided in the exhalation pipeline, a third one-way valve that makes the gas in the inhalation chamber flow towards the inhalation airbag is provided at the bottom of the inhalation airbag, a fourth one-way valve that makes the gas inside the exhalation airbag flow towards the exhalation chamber is provided at the bottom of the exhalation airbag, a fifth one-way valve that can make the gas flow from the chamber to the outside of the chamber is provided on the exhalation chamber, a sixth one-way valve for making the gas flow towards the inhalation airbag is provided in the air supply port, and a seventh one-way valve for making the gas flow from the filtering device into the inhalation chamber is provided between the filtering device and the inhalation chamber, and the pressure threshold of the seventh one-way valve is less than that of the fifth one-way valve.

2. The circulating air supply type respiratory system for shield cutter changing according to claim 1, wherein, The main body of the sealed structure includes a frame and a cover body, one end of the inhalation chamber and the exhalation chamber has an opening, and the inhalation chamber and the exhalation chamber are sealed by covering the opening with the cover body; through holes for the inhalation pipeline, the exhalation pipeline, and the air supply port to pass through respectively are provided on the cover body.

3. The circulating air supply type respiratory system for shield cutter changing according to claim 1, characterized in that, The pressure threshold of the seventh one-way valve is 0.2 - 0.5 bar smaller than the pressure threshold of the fifth one-way valve.

4. The circulating air supply type respiratory system for shield cutter changing according to any one of claims 1-3, characterized in that, The seventh one-way valve provided between the filtering device and the inhalation chamber for making the gas flow from the filtering device into the inhalation chamber is replaced with an eighth one-way valve provided between the exhalation chamber and the filtering device for making the gas flow from the exhalation chamber into the filtering device, and the pressure threshold of the seventh one-way valve is less than that of the fifth one-way valve is replaced with the pressure threshold of the eighth one-way valve is less than that of the fifth one-way valve.

5. The circulating air supply type respiratory system for shield cutter changing according to claim 4, wherein, The pressure threshold of the eighth one-way valve is 0.2 - 0.5 bar smaller than the pressure threshold of the fifth one-way valve.

6. The circulating air supply type respiratory system for shield cutter changing according to any one of claims 1-3, characterized in that, The device further includes an eighth one-way valve for making the gas flow from the exhalation chamber into the filtering device, the pressure threshold of the seventh one-way valve is less than that of the fifth one-way valve is replaced with the pressure threshold of the eighth one-way valve is less than that of the fifth one-way valve, and the pressure threshold of the eighth one-way valve is 0.2 - 0.5 bar smaller than the pressure threshold of the fifth one-way valve.

7. The circulating air supply type respiratory system for shield cutter changing according to any one of claims 1-3, characterized in that, The first one-way valve is located at the end of the inhalation pipeline close to the breathing mask, and the second one-way valve is located at the end of the exhalation pipeline close to the exhalation airbag.

8. The circulating air supply type respiratory system for shield cutter changing according to any one of claims 1-3, characterized in that, The fifth one-way valve is located at the bottom of the exhalation chamber.

9. The circulating air supply type respiratory system for shield cutter changing according to any one of claims 1-3, characterized in that, The filtering device includes a carbon dioxide adsorber detachably arranged in the main body.

10. The circulating air supply type respiratory system for shield cutter changing according to any one of claims 1-3, characterized in that, The device further includes a ninth one-way valve that can make the gas flow towards the breathing mask and is arranged at the end of the inhalation pipeline close to the inhalation airbag.

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