Breather valve

Abstract

The present application belongs to the technical field of breathing valve, and particularly relates to a breathing valve, which comprises a valve body and a pressure reduction assembly. The valve body is provided with an exhaust hole, and the valve body is provided with an installation cavity, an inflow channel, a gas cavity and an outflow channel. The pressure reduction assembly comprises a pressure reduction disc, a first switch and a second switch. The pressure reduction disc is installed in the installation cavity, and the pressure reduction disc is provided with an air inlet channel and a pressure reduction cavity. One end of the air inlet channel is communicated with the inflow channel, and the other end forms a pressure reduction port. The inflow channel is communicated with the pressure reduction cavity. The first switch can open or close the pressure reduction port. The pressure reduction cavity is communicated with the outflow channel. The second switch is installed between the pressure reduction cavity and the gas cavity. The second switch can be opened when the pressure in the gas cavity is greater than the pressure in the pressure reduction cavity. The second switch can be closed when the pressure in the gas cavity is less than or equal to the pressure in the pressure reduction cavity. The pressure reduction assembly reduces the gas pressure delivered to the patient, and improves the safety.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of breathing valve, and particularly relates to a breathing valve. BACKGROUND

[0002] The breathing valve is a valve which can make fluid or gas flow in only one direction in a one-way flow pipeline, and its main function is to prevent the pipeline system from backflowing or refluxing and maintain the normal operation of the system.

[0003] The existing breathing valve comprises a valve body, an inflow connector, an outflow connector and a pressure relief assembly, the valve body is provided with an inflow channel and an outflow channel, the inflow connector is connected to the inflow channel and used for being connected to a gas source, the outflow connector is connected to the outflow channel and used for being connected to a patient, the valve body is provided with a gas cavity, the inflow channel and the outflow channel are communicated with the gas cavity, and the pressure relief assembly is installed on the valve body and used for discharging the gas in the gas cavity when the outflow connector is blocked.

[0004] The existing breathing valve directly flows the gas in the valve body to the patient after the gas passes through the gas cavity, and the gas pressure input to the patient is too large, which can endanger the health of the patient. SUMMARY

[0005] The present application aims at solving the problem of the existing breathing valve that the gas pressure input to the patient is too large, and provides a breathing valve.

[0006] To solve the above technical problem, the present application provides a breathing valve, which comprises a valve body and a pressure reduction assembly, the valve body is provided with an exhaust hole, the valve body is provided with an installation cavity, the installation cavity is communicated with the exhaust hole, the valve body is provided with an inflow channel, a gas cavity and an outflow channel;

[0007] The pressure reduction assembly comprises a pressure reduction disc, a first switch and a second switch, the pressure reduction disc is installed in the installation cavity, the pressure reduction disc is provided with an air inlet channel and a pressure reduction cavity, one end of the air inlet channel is communicated with the inflow channel, and the other end forms a pressure reduction port, the inflow channel is communicated with the pressure reduction cavity, and the first switch can open or close the pressure reduction port;

[0008] The pressure reduction cavity is communicated with the outflow channel, the second switch is installed between the pressure reduction cavity and the gas cavity, the second switch can be opened when the pressure in the gas cavity is greater than the pressure in the pressure reduction cavity, and the second switch can be closed when the pressure in the gas cavity is less than or equal to the pressure in the pressure reduction cavity.

[0009] Optionally, the pressure reducing assembly further comprises a gas nozzle inserted in the pressure reducing port, the first switch part comprises a blocking plate, a first spring and a driving part, one end of the first spring is connected with the pressure reducing disc, the blocking plate comprises a connecting part, a blocking part and a pressing part, the connecting part is connected between the blocking part and the pressing part, and the connecting part is connected with the other end of the first spring away from the pressure reducing disc.

[0010] The driving part is connected with the valve body, and the driving part can drive the pressing part to move towards the pressure reducing disc.

[0011] Optionally, the second switch part comprises a pressure reducing valve plate connected between the gas cavity and the pressure reducing cavity, and the pressure reducing valve plate can be deformed towards the pressure reducing cavity to connect the gas cavity and the pressure reducing cavity when being impacted by the gas in the gas cavity.

[0012] Optionally, the pressure reducing disc is further provided with a gas storage cavity and a gas storage channel, the gas storage cavity is communicated with the gas storage channel, and the gas storage channel is communicated with the pressure reducing cavity.

[0013] Optionally, the pressure reducing assembly further comprises a filter assembly, the filter assembly comprises a filter silica gel disc, a filter plate and a filter valve plate, the filter silica gel disc is arranged on the side of the pressure reducing disc away from the outflow channel, the filter silica gel disc is connected with the cavity side wall of the mounting cavity, the filter plate is connected with the filter silica gel disc, the filter plate is provided with a filter hole, and the filter valve plate is connected with the filter plate and covers the filter hole, and the filter valve plate can be deformed to open the filter hole when being impacted by the gas in the mounting cavity.

[0014] Optionally, the valve body is provided with a mounting channel communicated with the gas cavity, an adjusting hole communicated with the outflow channel is arranged on the inner wall of the mounting channel.

[0015] Optionally, the valve body is provided with a mounting channel communicated with the gas cavity, an adjusting hole communicated with the outflow channel is arranged on the inner wall of the mounting channel.

[0016] The flow adjusting assembly comprises a housing, an adjusting rod, a second spring and a valve core, the housing is mounted in the mounting channel, the housing is provided with an adjusting cavity therein, the adjusting cavity is communicated with the gas cavity, the valve core is located in the adjusting cavity, one end of the adjusting rod extends into the adjusting cavity and is connected with the valve core, and the second spring is connected between the cavity wall of the adjusting cavity and the adjusting rod.

[0017] The cavity wall of the adjusting cavity is provided with an outlet hole communicated with the mounting channel, the adjusting rod can drive the valve core to move towards the direction close to the gas cavity to open the outlet hole, and the second spring can drive the valve core to move towards the direction away from the gas cavity to block the outlet hole.

[0018] Optionally, the valve further comprises an outlet joint and a check valve disc connected between the outlet joint and the valve body, the check valve disc is communicated with the outlet channel, and the outlet joint is communicated with the check valve disc.

[0019] Optionally, the valve further comprises a pressure relief assembly, the pressure relief disc is provided with a disc pressure relief hole, the valve body is provided with a valve body pressure relief hole communicated with the check valve disc, and the disc pressure relief hole is communicated with the valve body pressure relief hole.

[0020] The pressure relief assembly comprises a pressure relief plate, a pressure relief valve disc and a third spring, the pressure relief plate is arranged on the side of the pressure relief disc away from the outlet joint, the pressure relief plate is provided with a large pressure relief hole, one end of the third spring is connected with the cavity top wall of the mounting cavity, the other end of the third spring away from the cavity top wall is connected with the pressure relief valve disc, the pressure relief valve disc can compress the third spring to open the large pressure relief hole when being impacted by the gas in the mounting cavity, and the third spring can drive the pressure relief valve disc to move towards the direction close to the pressure relief plate to block the large pressure relief hole.

[0021] Optionally, the pressure relief assembly further comprises a pressure relief gasket and a pressure relief rod, the side of the pressure relief valve disc away from the pressure relief gasket is connected with the third spring, the pressure relief rod is connected with the pressure relief valve disc, and the pressure relief gasket is connected with the pressure relief rod, the pressure relief gasket can be deformed to emit a whistle sound when being impacted by the gas in the mounting cavity.

[0022] According to the breathing valve provided by the embodiment of the present application, when the first switch member opens the pressure relief port, part of the gas in the inlet channel directly enters the gas cavity, and the other part of the gas enters the inlet channel, part of the gas in the inlet channel enters the mounting cavity through the pressure relief port and is discharged from the exhaust hole, so that the pressure of the gas in the inlet channel is reduced, and the other part of the gas in the inlet channel enters the pressure relief cavity, so that the pressure of the gas in the gas cavity is greater than the pressure of the gas in the pressure relief cavity, the second switch member is opened, the gas in the gas cavity enters the pressure relief cavity through the second switch member, and then enters the outlet channel, and the gas is delivered to the patient through the outlet channel, compared with the prior art, the pressure relief assembly reduces the pressure of the gas delivered to the patient, and the safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1Structure schematic view of the breathing valve provided by an embodiment of the present application;

[0024] Figure 2 Structure schematic view of the breathing valve provided by an embodiment of the present application; Figure 1 A-A sectional view of the breathing valve provided by an embodiment of the present application;

[0025] Figure 3 Structure schematic view of the breathing valve provided by an embodiment of the present application; Figure 2 Structure schematic view of the breathing valve provided by an embodiment of the present application;

[0026] Figure 4 Structure schematic view of the breathing valve provided by an embodiment of the present application; Figure 3 Structure schematic view of the breathing valve provided by an embodiment of the present application;

[0027] Figure 5 Structure schematic view of the breathing valve provided by an embodiment of the present application; Figure 2 Structure schematic view of the breathing valve provided by an embodiment of the present application;

[0028] Figure 6 Structure schematic view of the breathing valve provided by an embodiment of the present application; Figure 5 Structure schematic view of the breathing valve provided by an embodiment of the present application;

[0029] Figure 7 Structure schematic view of the breathing valve provided by an embodiment of the present application; Figure 2 Structure schematic view of the breathing valve provided by an embodiment of the present application;

[0030] Figure 8 Structure schematic view of the breathing valve provided by an embodiment of the present application; Figure 2 Structure schematic view of the breathing valve provided by an embodiment of the present application;

[0031] The reference signs in the specification are as follows: 1, valve body; 2, valve body; 3, middle cover; 4, upper cover; 5, exhaust hole; 6, inlet joint; 7, flow regulating assembly; 8, inlet channel; 9, gas cavity; 10, mounting channel; 11, outlet channel; 12, one-way valve flap; 13, outlet joint; 14, pressure reducing assembly; 15, pressure reducing disc; 16, air inlet channel; 17, pressure reducing port; 18, pressure reducing cavity; 19, pressure reducing valve piece; 20, air nozzle; 21, blocking plate; 22, pressure relief plate; 23, large pressure relief hole; 24, small pressure relief hole; 25, adjusting rod; 26, second spring; 27, valve core; 28, stop step; 29, perforation; 30, outlet hole; 31, first sealing ring; 32, second sealing ring; 33, filter assembly; 34, pressure relief assembly; 35, adjusting hole; 36, valve body pressure relief hole; 37, disc pressure relief hole; 38, hinged column; 39, connecting part; 40, pressing part; 41, blocking part; 42, silica gel gasket; 43, first spring; 44, fixing rod; 45, bolt; 46, screw; 47, air storage channel; 48, air storage cavity; 49, filter silica gel disc; 50, clamping plate; 51, mounting hole; 52, ring groove; 53, filter plate; 54, filter hole; 55, driving column; 56, filter valve piece; 57, insertion hole; 58, fixing plate; 59, insertion column; 60, third spring; 61, pressure relief rod; 62, wide end; 63, pressure relief valve piece; 64, pressure relief gasket; 65, mounting cavity; 66, adjusting cavity. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] like Figures 1 to 8 As shown, an embodiment of the present invention provides a breathing valve, including a valve body 1 and a pressure reducing assembly 14, wherein the valve body 1 is provided with an exhaust hole 5, and an installation cavity 65 is provided in the valve body 1, wherein the installation cavity 65 is communicated with the exhaust hole 5, and an inlet channel 8, a gas cavity 9 and an outlet channel 11 are provided in the valve body 1.

[0034] The decompression assembly 14 includes a decompression disc 15, a first switch component and a second switch component. The decompression disc 15 is installed in the installation cavity 65. An air intake channel 16 and a decompression chamber 18 are provided on the decompression disc 15. One end of the air intake channel 16 is connected to the inlet channel 8, and the other end forms a decompression port 17. The inlet channel 8 is connected to the decompression chamber 18. The first switch component can open or close the decompression port 17.

[0035] The decompression chamber 18 is connected to the outflow channel 11, and the second switch component is installed between the decompression chamber 18 and the gas chamber 9. The second switch component can be opened when the pressure in the gas chamber 9 is greater than the pressure in the decompression chamber 18, and the second switch component can be closed when the pressure in the gas chamber 9 is less than or equal to the pressure in the decompression chamber 18.

[0036] The valve body 1 includes a valve main body 2, a middle cover 3 and an upper cover 4. The middle cover 3 is connected between the valve main body 2 and the upper cover 4. The inlet channel 8, the gas cavity 9 and the outlet channel 11 are all arranged inside the valve main body 2. The upper cover 4, the middle cover 3 and the valve main body 2 surround the installation cavity 65.

[0037] The inlet channel 8 is connected to the gas source. When the first switch opens the pressure reducing port 17, part of the gas in the inlet channel 8 directly enters the gas chamber 9, and another part of the gas enters the inlet channel 8. Part of the gas in the inlet channel 8 enters the installation chamber 65 through the pressure reducing port 17 and is then discharged from the exhaust hole 5, reducing the gas pressure in the inlet channel 8. Another part of the gas in the inlet channel 16 enters the pressure reducing chamber 18. In this way, the gas pressure in the gas chamber 9 is greater than the gas pressure in the pressure reducing chamber 18, so that the second switch is opened, and the gas in the gas chamber 9 enters the pressure reducing chamber 18 through the second switch, and then enters the outlet channel 11 from the pressure reducing chamber 18. The pressure-reduced gas is delivered to the patient by the outlet channel 11.

[0038] In an embodiment, the pressure relief assembly 14 further comprises an air nozzle 20 inserted in the pressure relief port 17, the first switch member comprises a blocking plate 21, a first spring 43 and a driving member, one end of the first spring 43 is connected to the pressure relief disc 15, the blocking plate 21 comprises a connecting portion 39, a blocking portion 41 and a pressing portion 40, the connecting portion 39 is connected between the blocking portion 41 and the pressing portion 40, the connecting portion 39 is connected to the other end of the first spring 43 away from the pressure relief disc 15, the driving member is connected to the valve body 1, and the driving member can drive the pressing portion 40 to move towards the pressure relief disc 15.

[0039] The driving member can drive the pressing portion 40 to move towards the pressure relief disc 15, since the connecting portion 39 is connected to the first spring 43, and the blocking portion 41 and the pressing portion 40 are located at both ends of the connecting portion 39, at this time, the first spring 43 can serve as a fulcrum, when the pressing portion 40 moves towards the pressure relief disc 15, the blocking portion 41 will gradually move away from the pressure relief port 17, thereby opening the air nozzle 20 on the pressure relief port 17, so that the gas in the air inlet channel 16 is discharged.

[0040] The side of the blocking portion 41 facing the pressure relief port 17 is provided with a silica gel gasket 42, which can play a buffering role between the blocking portion 41 and the air nozzle 20, avoiding damage to the air nozzle 20 due to a large impact between the blocking portion 41 and the air nozzle 20.

[0041] The pressure relief assembly 14 further comprises a fixing rod 44 connected to the pressure relief disc 15 by a bolt 45, the first spring 43 passes through the fixing rod 44, and the blocking portion 41 is hinged to the fixing rod 44 by the hinge column 38.

[0042] In an embodiment, the second switch member comprises a pressure relief valve piece 19 connected between the gas cavity 9 and the pressure relief cavity 18, the pressure relief valve piece 19 can be deformed towards the pressure relief cavity 18 when impacted by the gas in the gas cavity 9 to communicate the gas cavity 9 and the pressure relief cavity 18.

[0043] The second switch piece includes a pressure relief valve piece 19 connected between the gas cavity 9 and the pressure relief cavity 18. The pressure relief valve piece 19 can be deformed towards the pressure relief cavity 18 when impacted by the gas in the gas cavity 9 to communicate the gas cavity 9 with the pressure relief. The pressure relief valve piece 19 is a common one-way valve flap structure on the market. The pressure relief valve piece 19 is provided with a gas hole. When the gas pressure in the gas cavity 9 is greater than the gas pressure in the pressure relief cavity 18, the pressure in the gas cavity 9 upwardly impacts the pressure relief valve piece 19, so that the pressure relief valve piece 19 is deformed towards the pressure relief disc 15 to open the gas hole on the pressure relief valve piece 19 for the gas to pass through. When the gas pressure in the pressure relief cavity 18 is greater than the gas pressure in the gas cavity 9, the gas in the pressure relief cavity 18 downwardly impacts the pressure relief valve piece 19, which is deformed towards the gas cavity 9 to close the gas hole on the pressure relief valve piece 19, thereby separating the pressure relief cavity 18 from the gas cavity 9.

[0044] In an embodiment, the pressure relief disc 15 is further provided with a gas storage cavity 48 and a gas storage channel 47. The gas storage cavity 48 is in communication with the gas storage channel 47. The gas storage channel 47 is in communication with the pressure relief cavity 18.

[0045] The pressure relief disc 15 is further provided with a gas storage cavity 48 and a gas storage channel 47. The gas storage cavity 48 is in communication with the gas storage channel 47. The gas storage channel 47 is in communication with the pressure relief cavity 18. The gas storage cavity 48 is arranged inside the pressure relief disc 15. The gas storage cavity 48 is arranged beside the pressure relief cavity 18. The gas storage cavity 48 is in communication with the pressure relief cavity 18 through the gas storage channel 47 arranged inside the pressure relief disc 15. It should be noted that the lower side of the gas storage cavity 48 and the lower side of the pressure relief cavity 18 are both open structures. The pressure relief disc 15 is fixedly connected with the valve body 2 through a screw 46. The pressure relief disc 15 covers the valve body 2 and cooperates with the side of the valve body 2 facing the pressure relief disc 15 to jointly form the space of the gas storage cavity 48 and the pressure relief cavity 18. The arrangement of the gas storage cavity 48 and the gas storage channel 47 increases the gas pressure relief space in the pressure relief disc 15, which is convenient for pressure relief.

[0046] In an embodiment, the breathing valve further includes a filter assembly 33. The filter assembly 33 includes a filter silica gel disc 49, a filter plate 53 and a filter valve piece 56. The filter silica gel disc 49 is arranged on the side of the pressure relief disc 15 away from the outflow channel 11. The filter silica gel disc 49 is connected with the cavity side wall of the mounting cavity 65. The filter plate 53 is connected with the filter silica gel disc 49. The filter plate 53 is provided with a filter hole 54. The filter valve piece 56 is connected with the filter plate 53. The filter valve piece 56 covers the filter hole 54. The filter valve piece 56 can be deformed to open the filter hole 54 when impacted by the gas in the mounting cavity 65.

[0047] The outer periphery of the filter silica gel disc 49 is connected with the inner side wall of the valve body 2, the upper side edge of the filter silica gel disc 49 is provided with a clamping plate 50, when installed, the clamping plate 50 is clamped between the middle cover 3 and the valve body 2, which facilitates the installation of the filter silica gel disc 49.

[0048] The middle of the filter silica gel disc 49 is provided with a mounting hole 51, the hole wall of the mounting hole 51 is provided with a ring groove 52, the outer periphery of the filter plate 53 is inserted in the ring groove 52, when the filter silica gel disc 49 is deformed up and down, the filter plate 53 can move up and down, the filter assembly 33 further comprises a fixed plate 58, the fixed plate 58 is rectangular, the fixed plate 58 is connected with the filter plate 53, so as to clamp the filter valve piece 56 between the filter plate 53 and the fixed plate 58, the filter valve piece 56 is soft structure and can be deformed, under the action of the fixed plate 58, the filter valve piece 56 covers the filter plate 53, in the case that there is no gas blowing or external gas blowing to the filter plate 53, the filter piece blocks the filter hole 54 on the filter plate 53, when the gas in the installation cavity 65 impacts the filter plate 53 from the inside to the outside, the gas will pass through the filter hole 54 to impact the filter valve piece 56 upward, so as to deform the filter valve piece 56, thereby opening the filter hole 54.

[0049] The middle of the filter plate 53 is provided with a plug hole 57, the fixed plate 58 is provided with a plug column 59, the plug column 59 penetrates through the filter valve piece 56, and the filter valve piece 56 is pressed on the filter plate 53.

[0050] In an embodiment, a flow adjusting assembly 7 is further included, the flow adjusting assembly 7 is connected with the valve body 1, the flow adjusting assembly 7 communicates with the outflow channel 11, the flow adjusting assembly 7 communicates with the gas cavity 9, and the flow adjusting assembly 7 can adjust the gas flow of the outflow channel 11.

[0051] The flow adjusting assembly 7 is connected with the valve body 1, the flow adjusting assembly 7 communicates with the outflow channel 11, the flow adjusting assembly 7 communicates with the gas cavity 9, and the flow adjusting assembly 7 can adjust the gas flow of the outflow channel 11, which facilitates the control of the gas flow of the patient.

[0052] In an embodiment, the valve body 1 is provided with a mounting channel 10 which communicates with the gas cavity 9, and the inner wall of the mounting channel 10 is provided with an adjusting hole 35 which communicates with the outflow channel 11.

[0053] The flow regulating assembly 7 comprises a housing, a regulating rod 25, a second spring 26 and a valve core 27, the housing is installed in the installation channel 10, an adjusting cavity 66 is arranged in the housing, the adjusting cavity 66 is communicated with the gas cavity 9, the valve core 27 is located in the adjusting cavity 66, one end of the regulating rod 25 extends into the adjusting cavity 66 and is connected with the valve core 27, and the second spring 26 is connected between the cavity wall of the adjusting cavity 66 and the regulating rod 25.

[0054] An outflow hole 30 is arranged on the cavity wall of the adjusting cavity 66 and communicated with the installation channel 10, the regulating rod 25 can drive the valve core 27 to move towards the direction close to the gas cavity 9 to open the outflow hole 30, and the second spring 26 can drive the valve core 27 to move towards the direction away from the gas cavity 9 to block the outflow hole 30.

[0055] The housing is provided with the adjusting cavity 66, one end of the adjusting cavity 66 is opened and connected with the gas cavity 9, a stop step 28 is arranged on the inner wall of the adjusting cavity 66, a through hole 29 is arranged on the stop step 28, the regulating rod 25 passes through the through hole 29, the valve core 27 is installed on one end of the regulating rod 25 passing through the through hole 29, the radial dimension of the valve core 27 is greater than the hole diameter of the through hole 29, so that the valve core 27 can block the through hole 29, the outer periphery of the regulating rod 25 and the inner wall of the adjusting cavity 66 are sealed and assembled by a first sealing ring 31, the second spring 26 is connected between the side of the stop step 28 away from the valve core 27 and the regulating rod 25, and the outflow hole 30 is arranged on the cavity wall of the adjusting cavity 66 and located on the side of the stop step 28 away from the valve core 27.

[0056] An adjusting hole 35 is arranged on the side wall of the installation channel 10 and communicated with the outflow channel 11 on the valve body 2, when the regulating rod 25 is pushed, the valve core 27 moves away from the stop step 28 to open the through hole 29, at this time, since the adjusting cavity 66 is communicated with the gas cavity 9, the gas in the gas cavity 9 directly enters the adjusting cavity 66, the gas passes through the adjusting cavity 66 and enters the installation channel 10 from the outflow hole 30, and then the gas enters the outflow channel 11 from the installation channel 10 and is delivered to the patient through the outflow channel 11.

[0057] The side of the valve core 27 towards the stop step 28 is provided with a second sealing ring 32, so that the sealing between the valve core 27 and the stop step 28 can be better realized, the opening between the valve core 27 and the stop step 28 is adjusted, so that the gas flow passing through the place is adjusted, and then the gas flow entering the installation channel 10 from the adjusting cavity 66 is adjusted.

[0058] It should be noted that when the valve core 27 opens the perforation 29, the gas in the gas cavity 9 directly enters the adjusting cavity 66, so that the gas pressure in the pressure reduction cavity 18 is greater than the gas pressure in the gas cavity 9, so that the gas hole on the pressure reduction valve piece 19 is closed, and the gas no longer enters the pressure reduction cavity 18 from the gas cavity 9.

[0059] In an embodiment, the breathing valve further comprises an outflow connector 13 and a one-way valve flap 12 connected between the outflow connector 13 and the valve body 1, the one-way valve flap 12 communicates with the outflow channel 11, and the outflow connector 13 communicates with the one-way valve flap 12. The one-way valve flap 12 is provided to prevent gas backflow, and the outflow connector 13 is connected to the patient.

[0060] In an embodiment, the breathing valve further comprises a pressure relief assembly 34, the pressure reduction disc 15 is provided with a disc pressure relief hole 37, the valve body 1 is provided with a valve body pressure relief hole 36, the valve body pressure relief hole 36 communicates with the one-way valve flap 12, and the disc pressure relief hole 37 communicates with the valve body pressure relief hole 36.

[0061] The pressure relief assembly 34 comprises a pressure relief plate 22, a pressure relief valve piece 63 and a third spring 60, the pressure relief plate 22 is arranged on the side of the pressure reduction disc 15 away from the outflow connector 13, the pressure relief plate 22 is provided with a large pressure relief hole 23, one end of the third spring 60 is connected to the cavity top wall of the mounting cavity 65, the other end of the third spring 60 away from the cavity top wall is connected to the pressure relief valve piece 63, the pressure relief valve piece 63 can compress the third spring 60 when impacted by the gas in the mounting cavity 65 to open the large pressure relief hole 23, and the third spring 60 can drive the pressure relief valve piece 63 to move towards the pressure relief plate 22 to block the large pressure relief hole 23.

[0062] The pressure relief plate 22 is arranged on the inner wall of the middle cover 3, the pressure relief plate 22 is integrally formed with the middle cover 3, the middle part of the pressure relief plate 22 is provided with a large pressure relief hole 23, and the third spring 60 blocks the large pressure relief hole 23 by elastic force. When the gas in the mounting cavity 65 impacts the pressure relief valve piece 63 upward through the large pressure relief hole 23, the pressure relief valve piece 63 compresses the third spring 60 upward to make the pressure relief valve piece 63 away from the large pressure relief hole 23, thereby opening the large pressure relief hole 23 and making the gas in the mounting cavity 65 discharged from the exhaust hole 5 arranged on the upper cover 4.

[0063] The pressure relief plate 22 is provided with a small pressure relief hole 24 around the large pressure relief hole 23, and the gas in the mounting cavity 65 can be discharged from the valve body 1 through the small pressure relief hole 24 and the exhaust hole 5 in sequence.

[0064] When the one-way valve flap 12 or the outlet joint 13 is blocked, the gas will enter the mounting cavity 65 through the valve body pressure relief hole 36 and the disc pressure relief hole 37 in turn, the gas in the mounting cavity 65 will impact the pressure relief valve piece 63 upward through the large pressure relief hole 23, the pressure relief valve piece 63 will compress the third spring 60 upward, so that the pressure relief valve piece 63 leaves the large pressure relief hole 23, thereby opening the large pressure relief hole 23, the gas in the mounting cavity 65 is discharged from the exhaust hole 5 arranged on the upper cover 4, thereby achieving pressure relief, avoiding explosion or harm to the patient due to excessive gas pressure in the valve body 1.

[0065] The lower side of the filter plate 53 is provided with a driving column 55, under normal gas supply of the breathing valve, the driving column 55 presses the pressing part 40 of the pressure relief assembly 14 downward as the driving part, so that the blocking part 41 opens the gas nozzle 20, when pressure relief, the filter silica gel disc 49 is deformed upward by the gas in the mounting cavity 65, so that the driving column 55 leaves the pressing part 40 of the blocking plate 21, at this time, under the elastic force of the first spring 43, the first spring 43 drives the pressing part 40 away from the pressure relief disc 15, so that the blocking part 41 blocks the gas nozzle 20, at this time, the gas pressure in the gas cavity 9 and the pressure relief cavity 18 is equal, the pressure in the gas cavity 9 no longer enters the pressure relief cavity 18, so that the gas is no longer transported into the outlet channel 11, thereby achieving rapid pressure relief.

[0066] In an embodiment, the pressure relief assembly 34 further comprises a pressure relief gasket 64 and a pressure relief rod 61, the side of the pressure relief valve piece 63 away from the pressure relief gasket 64 is connected with the third spring 60, the pressure relief rod 61 is connected with the pressure relief valve piece 63, the pressure relief gasket 64 is connected with the pressure relief rod 61, and the pressure relief gasket 64 can be deformed by the gas in the mounting cavity 65 to emit a whistle.

[0067] The pressure relief rod 61 is guided to be assembled on the inner side of the upper cover 4, the pressure relief rod 61 is provided with a wide end 62, the pressure relief gasket is consistent in size with the pressure relief valve piece 19, the pressure relief gasket is clamped between the pressure relief valve piece 19 and the wide end 62, and the pressure relief gasket 64 can be deformed by the gas in the mounting cavity 65 to emit a whistle.

[0068] The breathing valve further comprises an inlet joint 6 for connecting with a gas source, the inlet joint 6 is mounted in the inlet channel 8, and the inlet joint 6 communicates with the inlet channel 8.

[0069] The breathing valve of the embodiment of the present application has an automatic gas supply mode and an on-demand gas supply mode, and the working principle is as follows:

[0070] In the automatic gas supply mode, the driving column 55 as the driving member presses the pressing part 40 of the pressure reducing assembly 14 downward, so that the blocking part 41 opens the gas nozzle 20, and a part of the gas in the inflow passage 8 directly enters the gas cavity 9, and another part of the gas enters the inflow passage 8, and a part of the gas in the inflow passage 8 enters the installation cavity 65 through the pressure relief port 17, passes through the small pressure relief hole 24 on the pressure relief plate 22, and is discharged from the exhaust hole 5, thereby reducing the gas pressure in the inflow passage 8, and another part of the gas in the inflow passage 16 enters the pressure reducing cavity 18, so that the gas pressure in the gas cavity 9 is greater than the gas pressure in the pressure reducing cavity 18, so that the gas hole on the pressure relief valve piece 19 is opened, the gas in the gas cavity 9 enters the pressure reducing cavity 18 through the pressure relief valve piece 19, and then enters the outflow passage 11 from the pressure reducing cavity 18, and the gas after pressure reduction is delivered to the patient through the outflow connector 13.

[0071] In the automatic gas supply mode, the driving column 55 as the driving member presses the pressing part 40 of the pressure reducing assembly 14 downward, so that the blocking part 41 opens the gas nozzle 20, and a part of the gas in the inflow passage 8 directly enters the gas cavity 9, and another part of the gas enters the inflow passage 8, and a part of the gas in the inflow passage 8 enters the installation cavity 65 through the pressure relief port 17, passes through the small pressure relief hole 24 on the pressure relief plate 22, and is discharged from the exhaust hole 5, thereby reducing the gas pressure in the inflow passage 8, and another part of the gas in the inflow passage 16 enters the pressure reducing cavity 18, so that the gas pressure in the gas cavity 9 is greater than the gas pressure in the pressure reducing cavity 18, so that the gas hole on the pressure relief valve piece 19 is opened, the gas in the gas cavity 9 enters the pressure reducing cavity 18 through the pressure relief valve piece 19, and then enters the outflow passage 11 from the pressure reducing cavity 18, and the gas after pressure reduction is delivered to the patient through the outflow connector 13.

[0072] When the valve flap 12 or the outlet joint 13 is blocked, the gas will enter the installation cavity 65 through the valve body pressure relief hole 36 and the disc pressure relief hole 37 in turn, the gas in the installation cavity 65 will impact the pressure relief valve piece 63 upward through the large pressure relief hole 23, the pressure relief valve piece 63 will compress the third spring 60 upward, so that the pressure relief valve piece 63 leaves the large pressure relief hole 23, thereby opening the large pressure relief hole 23, so that the gas in the installation cavity 65 is discharged from the exhaust hole 5 arranged on the upper cover 4, in addition, the filter silica gel disc 49 is deformed upward by the gas in the installation cavity 65 during pressure relief, so that the driving column 55 leaves the pressing part 40 of the blocking plate 21, at this time, the first spring 43 will drive the pressing part 40 away from the pressure relief disc 15 under the elastic force of the first spring 43, so that the blocking part 41 blocks the gas nozzle 20, at this time, the gas pressure in the gas cavity 9 and the pressure relief cavity 18 is equal, the pressure in the gas cavity 9 no longer enters the pressure relief cavity 18, so that the gas is no longer transported into the outlet channel 11, thereby realizing rapid pressure relief, at the same time, the pressure relief gasket 64 can be deformed by the gas in the installation cavity 65 to emit a whistle.

[0073] According to the breathing valve of the embodiment of the present application, when the first switch piece opens the pressure relief port 17, part of the gas in the inlet channel 8 directly enters the gas cavity 9, and the other part of the gas enters the inlet channel 8, part of the gas in the inlet channel 8 enters the installation cavity 65 through the pressure relief port 17 and is discharged from the exhaust hole 5, thereby reducing the gas pressure in the inlet channel 8, and the other part of the gas in the inlet channel 16 enters the pressure relief cavity 18, in this way, the gas pressure in the gas cavity 9 is greater than the gas pressure in the pressure relief cavity 18, so that the second switch piece is opened, the gas in the gas cavity 9 enters the pressure relief cavity 18 through the second switch piece, and then enters the outlet channel 11 from the pressure relief cavity 18, and the gas after pressure relief is transported to the patient from the outlet channel 11, compared with the prior art, the pressure relief assembly 14 reduces the gas pressure transported to the patient, thereby improving the safety.

[0074] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A breathing valve, characterized in that: The invention comprises a valve body (1) and a pressure reducing assembly (14), wherein the valve body (1) is provided with an exhaust hole (5), the valve body (1) is provided with a mounting cavity (65), the mounting cavity (65) is communicated with the exhaust hole (5), and the valve body (1) is provided with an inlet channel (8), a gas cavity (9) and an outlet channel (11); The decompression assembly (14) includes a decompression disc (15), a first switch member, and a second switch member. The decompression disc (15) is installed in the installation cavity (65). An air inlet channel (16) and a decompression cavity (18) are provided on the decompression disc (15). One end of the air inlet channel (16) is communicated with the inlet channel (8), and the other end forms a decompression port (17). The inlet channel (8) is communicated with the decompression cavity (18). The first switch member can open or close the decompression port (17). The decompression chamber (18) is in communication with the outflow channel (11); the second switch element is installed between the decompression chamber (18) and the gas chamber (9); the second switch element can be opened when the pressure in the gas chamber (9) is greater than the pressure in the decompression chamber (18); and the second switch element can be closed when the pressure in the gas chamber (9) is less than or equal to the pressure in the decompression chamber (18); The decompression assembly (14) further includes an air nozzle (20), the air nozzle (20) being inserted into the decompression port (17), the first switch member including a blocking plate (21), a first spring (43) and a driving member, one end of the first spring (43) being connected to the decompression disk (15), the blocking plate (21) including a connecting portion (39), a blocking portion (41) and a pressing portion (40), the connecting portion (39) being connected between the blocking portion (41) and the pressing portion (40), and the connecting portion (39) being connected to an end of the first spring (43) away from the decompression disk (15); The driving member is connected to the valve body (1), and the driving member can drive the pressing portion (40) to move in a direction close to the pressure reducing disk (15).

2. The breathing valve according to claim 1, characterized in that The second switch member comprises a pressure reducing valve plate (19), the pressure reducing valve plate (19) being connected between the gas chamber (9) and the pressure reducing chamber (18), and the pressure reducing valve plate (19) being capable of deforming toward the pressure reducing chamber (18) when impacted by the gas in the gas chamber (9) so as to connect the gas chamber (9) with the pressure reducing chamber (18).

3. The breathing valve according to claim 1, characterized in that The decompression disc (15) is further provided with an air storage cavity (48) and an air storage channel (47), wherein the air storage cavity (48) is communicated with the air storage channel (47), and the air storage channel (47) is communicated with the decompression cavity (18).

4. The breathing valve according to any one of claims 1 to 3, characterized in that: The invention also includes a filter assembly (33), wherein the filter assembly (33) includes a filter silica gel disc (49), a filter plate (53) and a filter valve disc (56), wherein the filter silica gel disc (49) is arranged on a side of the pressure reducing disc (15) facing away from the outflow channel (11), the filter silica gel disc (49) is connected to the side wall of the mounting cavity (65), the filter plate (53) is connected to the filter silica gel disc (49), a filter hole (54) is provided on the filter plate (53), the filter valve disc (56) is connected to the filter plate (53), the filter valve disc (56) covers the filter hole (54), and the filter valve disc (56) can be deformed to open the filter hole (54) when impacted by gas in the mounting cavity (65).

5. The breathing valve according to any one of claims 1 to 3, characterized in that: The valve body (1) further comprises a flow regulating component (7), wherein the flow regulating component (7) is connected to the valve body (1), the flow regulating component (7) is in communication with the outflow channel (11), the flow regulating component (7) is in communication with the gas chamber (9), and the flow regulating component (7) is capable of regulating the gas flow in the outflow channel (11).

6. The breathing valve according to claim 5, characterized in that: The valve body (1) is provided with a mounting channel (10) communicating with the gas chamber (9), and an adjusting hole (35) communicating with the outflow channel (11) is provided on the inner wall of the mounting channel (10); The flow regulating assembly (7) comprises a housing, a regulating rod (25), a second spring (26) and a valve core (27); the housing is mounted in the mounting channel (10); a regulating chamber (66) is provided in the housing; the regulating chamber (66) is communicated with the gas chamber (9); the valve core (27) is located in the regulating chamber (66); one end of the regulating rod (25) extends into the regulating chamber (66) and is connected to the valve core (27); the second spring (26) is connected between the cavity wall of the regulating chamber (66) and the regulating rod (25); An outlet hole (30) communicating with the mounting channel (10) is provided on the wall of the regulating chamber (66); the regulating rod (25) is capable of driving the valve core (27) to move toward the gas chamber (9) to open the outlet hole (30); and the second spring (26) is capable of driving the valve core (27) to move toward a direction away from the gas chamber (9) to block the outlet hole (30).

7. The breathing valve according to claim 1, characterized in that It also includes an outflow joint (13) and a one-way valve disc (12), wherein the one-way valve disc (12) is connected between the outflow joint (13) and the valve body (1), the one-way valve disc (12) is communicated with the outflow channel (11), and the outflow joint (13) is communicated with the one-way valve disc (12).

8. The breathing valve according to claim 7, characterized in that: It also includes a pressure relief assembly (34), the pressure relief disc (15) is provided with a disc pressure relief hole (37), the valve body (1) is provided with a valve body pressure relief hole (36), the valve body pressure relief hole (36) is communicated with the one-way valve disc (12), and the disc pressure relief hole (37) is communicated with the valve body pressure relief hole (36); The pressure relief assembly (34) includes a pressure relief plate (22), a pressure relief valve plate (63) and a third spring (60). The pressure relief plate (22) is arranged on a side of the pressure reducing disc (15) facing away from the outlet joint (13). A large pressure relief hole (23) is provided on the pressure relief plate (22). One end of the third spring (60) is connected to the top wall of the mounting cavity (65). The end of the third spring (60) away from the top wall of the cavity is connected to the pressure relief valve plate (63). When the pressure relief valve plate (63) is impacted by the gas in the mounting cavity (65), it can compress the third spring (60) to open the large pressure relief hole (23). The third spring (60) can drive the pressure relief valve plate (63) to move toward the pressure relief plate (22) to block the large pressure relief hole (23).

9. The breathing valve according to claim 8, characterized in that: The pressure relief assembly (34) further includes a pressure relief gasket (64) and a pressure relief rod (61); the side of the pressure relief valve plate (63) facing away from the pressure relief gasket (64) is connected to the third spring (60); the pressure relief rod (61) is connected to the pressure relief valve plate (63); the pressure relief gasket (64) is connected to the pressure relief rod (61); and the pressure relief gasket (64) can be deformed by the impact of gas in the installation cavity (65) to emit a whistling sound.

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