CN218739919U - Disconnect-type air supply respiratory device, fire helmet and rescue equipment - Google Patents

Abstract

The application discloses disconnect-type air supply respiratory device, fire helmet and rescue equipment, wherein disconnect-type air supply respiratory device is including connecting gradually: a gas cylinder; the primary pressure reducing valve is used for reducing the pressure of the high-pressure gas in the gas cylinder to a first pressure; a medium pressure hose; the breathing pressure reducing valve is used for receiving and reducing the medium-pressure gas with the first pressure to a second pressure suitable for breathing; breathing is difficult to be held in mouth; the breath pressure reducing valve and the breath mouthpiece are assembled into a biting component, and the biting component has a containing state close to the gas cylinder and an opening state far away from the gas cylinder; the first-stage pressure reducing valve is provided with a cut-off valve for controlling the opening of the gas circuit; in the opening state, the biting component is linked to open the block valve. The technical scheme that this application is disclosed passes through the setting that middling pressure hose and linkage were opened, can effectively overcome prior art in the product heavy, the adaptability is low, the problem of not being convenient for use has promoted light, ease for use and many scenes adaptability, effectively guarantees rescue personnel's life safety.

Description

Disconnect-type air supply respiratory device, fire helmet and rescue equipment

Technical Field

The application relates to the field of fire rescue, in particular to a separated air source breathing device, a fire helmet and rescue equipment.

Background

When fire fighters and emergency rescue personnel carry out fire fighting or emergency rescue, if poisonous gas, smoke, harmful pollutants suspended in the air or oxygen lack which are harmful to human bodies are inhaled, the bodies of the fire fighters and the emergency rescue personnel are greatly damaged. In order to prevent the above-mentioned injuries, fire fighters and rescue workers are equipped with some corresponding protection devices according to different working conditions, such as positive pressure fire-fighting air respirator, oxygen respirator, diving respirator, negative pressure type respirator and external air supply type positive pressure fire-fighting air respirator, etc. The user inhales the compressed air stored in the high-pressure air bottle through the mouth of the mouthpiece without depending on the external environment gas, and uses the same mouthpiece to discharge the exhaled air out of the special respirator head of the appliance.

For example, chinese patent publication No. CN103830856A discloses a portable oxygen supply protection system for disaster prevention and emergency escape, which mainly comprises: rapidly preparing an oxygen part; a flow control and delivery coupling; the mask is composed of three parts. When the system is used, clean oxygen required by human survival can be provided, toxic and harmful gases in the environment are isolated, and the respiratory system and the visual system of people are protected. Thereby avoiding asphyxia or death caused by thinking and action retardation of people caused by oxygen deficiency or toxic and harmful gas and/or toxic smoke dust inhalation when an emergency occurs.

However, the breathing apparatus with the structures of the face mirror, the face mask and the like has larger volume, and the burden of fire fighters is increased; the existing rescue device is designed aiming at a current scene rescue task, and has lower adaptability; meanwhile, professional rescue equipment has high use requirements on personnel without professional training, and rescue difficulty is increased; therefore, the rescue breathing device has room for improvement in light weight, easy use and multi-scene adaptability.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application discloses disconnect-type air supply respiratory device includes and connects gradually according to the gas flow direction:

a gas cylinder for providing high pressure gas;

the primary pressure reducing valve is arranged on the gas cylinder and is used for reducing the pressure of high-pressure gas in the gas cylinder to a first pressure;

the medium-pressure hose is used for receiving and conveying medium-pressure gas at the first pressure;

the breathing pressure reducing valve is used for receiving and reducing the medium-pressure gas with the first pressure to a second pressure suitable for breathing;

the breathing mouthpiece is used for receiving and conveying the low-pressure gas with the second pressure for breathing;

the breath pressure reducing valve and the breath mouthpiece are assembled into a biting component, and the biting component has a containing state close to the gas cylinder and an opening state far away from the gas cylinder; the primary pressure reducing valve is provided with a cut-off valve for controlling the opening of the gas circuit; and in the opening state, the biting assembly is linked to open the block valve.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the primary pressure reducing valve includes a primary valve body mounted on the cylinder head of the gas cylinder, and a primary pressure reducing valve core, a safety valve and the cut-off valve mounted inside the primary valve body, and the safety valve and the cut-off valve are communicated with each other.

Optionally, the block valve comprises:

a cut-off valve rod having a cut-off state and an opposite open state that cut off the primary pressure reducing valve spool and the outlet of the primary pressure reducing valve;

and the control bolt is used for keeping the stop valve rod in the stop state and is linked with the biting assembly through a control cable.

Optionally, the breathing pressure reducing valve comprises:

the secondary valve body is connected with the breathing mouthpiece;

the control diaphragm is hermetically arranged on the secondary valve body and is provided with a trigger position responding to the airflow state of the breathing mouthpiece and a standby position in a natural state;

and the secondary pressure reducing valve core is controlled by the control diaphragm.

Optionally, the breathing pressure reducing valve further comprises an exhaust membrane, the exhaust membrane is installed on the second-stage valve body in a one-way sealing mode, and the response state of the exhaust membrane is opposite to that of the control membrane relative to the airflow state of the breathing mouthpiece.

Optionally, a secondary decompression chamber and an air flow channel which are communicated with each other are arranged in the secondary valve body, the exhaust diaphragm and the control diaphragm are respectively installed on two sides of the air flow channel, the extending axial direction of the secondary decompression chamber points to the control diaphragm, and the secondary decompression valve core is installed in the secondary decompression chamber.

Optionally, the second-stage pressure reducing valve core includes a second-stage pressure reducing valve rod movably mounted in the second-stage pressure reducing chamber, and a control rocker arm assembly hinged to the second-stage valve body, and the control rocker arm assembly is acted by the control diaphragm to drive the second-stage pressure reducing valve rod to move to a corresponding position.

Optionally, the breathing mouthpiece includes:

the mouth piece body comprises an occlusion cavity for providing occlusion space, an occlusion part arranged on the inner wall of the occlusion cavity and an air supply channel for communicating the occlusion cavity with an air source;

the nasal cavity sealing assembly comprises a flexible connecting arm extending from the mouthpiece body and a flexible plug arranged at the end part of the flexible connecting arm, and the outer diameter of the flexible plug is gradually reduced in the direction away from the mouthpiece body.

The application discloses fire helmet, including helmet and foretell disconnect-type air supply respiratory device, disconnect-type air supply respiratory device's gas cylinder install in on the helmet, the medium pressure hose around establish with the helmet, sting and holding subassembly detachable and be located on the helmet.

The application discloses portable rescue equipment, including acceping subassembly and foretell disconnect-type air supply respiratory device, disconnect-type air supply respiratory device accept in the subassembly.

The application discloses expandable rescue equipment, including foretell disconnect-type air supply respiratory device and expand the subassembly, expand the subassembly including aerifing the bridge and expanding the gas cylinder, the gas cylinder through aerify the bridge with expand the gas cylinder intercommunication.

The technical scheme that this application discloses through the setting that middling pressure hose and linkage were opened, can effectively overcome prior art in the product heavy, the adaptability is low, the problem of not convenient to use has promoted light, ease for use and many scenes adaptability, effectively guarantees rescue personnel's life safety.

Specific advantageous technical effects will be further explained in conjunction with specific structures or steps in the detailed description.

Drawings

FIG. 1 is a schematic diagram of a separate source breathing apparatus according to an embodiment;

FIG. 2 is a schematic view of the one-stage pressure reducing valve of FIG. 1;

FIG. 3 is a schematic diagram of the breathing pressure relief valve of FIG. 1;

FIG. 4 is a schematic view of an embodiment of a fire fighting helmet;

FIG. 5 is a schematic view of the fire-fighting helmet of FIG. 4 from another perspective;

FIG. 6 is a schematic view of a breathing mouthpiece of the escape apparatus according to an embodiment;

fig. 7 is a sectional view schematically illustrating the construction of the breath mouthpiece of the escape apparatus of fig. 6;

fig. 8 is a side schematic view of a breathing mouthpiece of the escape apparatus of fig. 6;

FIG. 9 is a schematic view of the nasal cavity closure assembly of FIG. 6;

fig. 10 is a schematic structural diagram of an expandable rescue apparatus in an embodiment.

The reference numerals in the figures are illustrated as follows:

1. a mouthpiece body; 11. an occlusion cavity; 12. an engaging portion; 121. a limiting wall; 13. a gas supply channel;

2. a nasal cavity closure assembly; 21. a flexible connecting arm; 211. a base; 212. an adapter base; 213. a connecting portion; 214. adjusting the ribs; 215. fitting an angle; 22. a flexible plug; 221. a deformation cavity;

3. a gas cylinder;

4. a primary pressure reducing valve; 41. a primary valve body; 42. a primary pressure reducing valve core; 43. a safety valve; 44. a block valve; 441. a stop valve stem; 442. controlling the bolt; 443. a control cable;

5. a medium pressure hose;

6. a breathing pressure reducing valve; 61. a secondary valve body; 62. a control diaphragm; 63. a secondary pressure reducing valve core; 631. a secondary pressure reducing valve stem; 632. a control rocker arm assembly; 64. an exhaust membrane; 65. an air flow channel;

7. a helmet;

8. an air bridge; 81. and expanding the gas cylinder.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 9, the present application discloses a separated gas source breathing apparatus, which comprises:

a gas cylinder 3 for supplying high-pressure gas;

the primary pressure reducing valve 4 is arranged on the gas cylinder 3, and the primary pressure reducing valve 4 is used for reducing the pressure of the high-pressure gas in the gas cylinder 3 to a first pressure;

the medium-pressure hose 5 is used for receiving and conveying medium-pressure gas with first pressure;

the breathing pressure reducing valve 6 is used for receiving and reducing the medium-pressure gas with the first pressure to a second pressure suitable for breathing;

the breathing mouthpiece is used for receiving and conveying low-pressure gas with second pressure for breathing;

the breath pressure reducing valve 6 and the breath mouthpiece are assembled into a biting component, and the biting component has an accommodating state close to the gas cylinder 3 and an opening state far away from the gas cylinder 3; the first-stage pressure reducing valve 4 is provided with a cut-off valve 44 for controlling the opening of the air passage; in the open state, the snap-on assembly is interlocked to open the shut-off valve 44.

In this embodiment, the primary pressure reducing valve 4 has a dual function of a shut-off valve and a pressure reducing valve. The breathing pressure reducing valve 6 integrates the functions of a pressure reducing valve, an automatic air supply valve and a exhalation valve, is connected with the primary pressure reducing valve 4 on the high-pressure air bottle 3 through the medium-pressure hose 5 for use, directly bears the output pressure of the bottle head valve during work, can reduce the pressure of the air which is reduced once through the bottle head valve to the low-pressure air which can be breathed again during use, and is used for breathing by a user, and meanwhile, the air exhaled by the user can pass through the low-pressure cavity ejector head of the ejector head. The technical scheme that this application discloses through the setting that medium pressure hose 5 and linkage were opened, can effectively overcome prior art product heaviness, the adaptability is low, the problem of not convenient to use has promoted light, ease for use and many scenes adaptability, effectively guarantees rescue personnel's life safety.

In a specific product, the small-volume high-pressure gas cylinder 3 is the gas cylinder 3 which is required to meet the GB 28053-2011 or EN12245 standard. The rated working pressure of the gas cylinder 3 is 30MPa, and the gas cylinder can be filled with compressed air with the pressure lower than the allowable pressure of the high-pressure gas cylinder 3. Considering light weight, the volume is recommended to be 0.3-0.6 liter. In terms of performance, the medium-pressure hose 5 is a resin synthetic tube which can resist pressure of more than 100bar and resist high temperature of 120 ℃ and is flame-retardant.

In the details of the arrangement of the primary pressure reducing valve 4, referring to the embodiment shown in fig. 2, the primary pressure reducing valve 4 includes a primary valve body 41 mounted on the head of the gas cylinder 3, and a primary pressure reducing valve spool 42, a safety valve 43, and a shut-off valve 44 mounted inside the primary valve body 41, the safety valve 43 and the shut-off valve 44 communicating with each other.

Further, the shut-off valve 44 includes:

a cut-off valve rod 441, the cut-off valve rod 441 having a cut-off state and a relative open state for cutting off the outlets of the primary pressure reducing valve spool 42 and the primary pressure reducing valve 4;

a control pin 442 for holding the check valve shaft 441 in a check state, the control pin 442 being linked with the bite-holding unit by a control cable 443.

In terms of parameters, the rated working pressure of the primary pressure reducing valve 4 is set to 30MPa, the reduced pressure at the outlet is 3 to 5MPa (i.e., the first pressure can be understood), and a safety valve 43 in the form of a spring is further provided on the primary pressure reducing valve 4. Besides, the primary pressure reducing valve 4 can be provided with a pressure gauge, the measuring range of the pressure gauge is (0-400) bar, and the pressure gauge displays the pressure of the gas cylinder 3. A special inflation inlet can be arranged, so that compressed air can be conveniently filled into the air bottle 3 through a special inflation connector.

In the details of the arrangement of the breathing pressure reducing valve 6, with reference to the embodiment shown in fig. 3, the breathing pressure reducing valve 6 comprises:

the secondary valve body 61 is connected with the breathing mouthpiece;

a control diaphragm 62 hermetically mounted on the secondary valve body 61, the control diaphragm 62 having a trigger position responsive to an airflow state of the breathing mouthpiece and a standby position in a natural state;

and the secondary pressure reducing valve core 63 is controlled by the control diaphragm 62.

Further, the breathing pressure reducing valve 6 further comprises an exhaust diaphragm 64, wherein the exhaust diaphragm 64 is installed on the secondary valve body 61 in a one-way sealing mode, and the response state of the exhaust diaphragm 64 and the response state of the control diaphragm 62 are opposite relative to the airflow state of the breathing mouthpiece.

Referring to the embodiment shown in the drawings, a secondary decompression chamber and an air flow passage 65 (communicating with an air supply passage below) communicating with each other are provided in the secondary valve body 61, an exhaust diaphragm 64 and a control diaphragm 62 are respectively installed on both sides of the air flow passage 65, an extended axial direction of the secondary decompression chamber is disposed toward the control diaphragm 62, and a secondary decompression valve core 63 is installed in the secondary decompression chamber.

In a control mode, the secondary pressure reducing valve core 63 comprises a secondary pressure reducing valve rod 631 movably mounted in the secondary pressure reducing chamber and a control rocker arm assembly 632 hinged to the secondary valve body 61, and the control rocker arm assembly 632 is acted by the control membrane 62 to drive the secondary pressure reducing valve rod 631 to move to a corresponding position. The control rocker arm assembly 632 may be a single rocker arm in actual production, or may be a rocker arm assembly as shown with reference to the figures.

In the details of the arrangement of the breathing mouthpiece, referring to fig. 6 to 9, the present application discloses a breathing mouthpiece of an escape apparatus, comprising:

the mouth piece body 1 comprises an occlusion cavity 11 for providing occlusion space, an occlusion part 12 arranged on the inner wall of the occlusion cavity 11 and an air supply channel 13 for communicating the occlusion cavity 11 with an air source;

the nasal cavity sealing assembly 2 comprises flexible connecting arms 21 extending from the mouthpiece body 1 and a flexible plug 22 arranged at the end of the flexible connecting arms 21, wherein the outer diameter of the flexible plug 22 is gradually reduced in the direction away from the mouthpiece body 1.

The mouth piece body 1 can provide firm stinging and holding the effect, provides airflow channel simultaneously, and the nasal cavity seals subassembly 2 can be when wearing the mouth piece and realize the closure of nasal cavity in step to can guarantee user's safety from structural, especially not receive the succour of professional training, have higher spreading value.

In the detailed structure of the flexible plug 22, the flexible plug 22 with gradually reduced outer diameter can be self-adaptive to meet the sealing requirement. Referring to the embodiment shown in the drawings, the inside of the flexible plug 22 is a deformation cavity 221 that provides a space for deformation of itself. I.e., the flexible plug 22 is cylindrical in a thin-walled structure. In detail, the flexible plug 22 is cylindrical and open toward one end of the mouthpiece body 1 and closed away from the mouthpiece body 1. The open-ended configuration provides more freedom of deformation and thus improved compliance of the flexible plug 22. In cooperation, referring to the embodiment shown in the drawings, the flexible plugs 22 are provided separately in two and on either side of the flexible connecting arms 21. The number of flexible plugs 22 is not only designed to match ergonomics, but it is also important to be able to balance the load of the flexible connecting arms 21, thereby improving the wearing experience.

In the detailed arrangement of the flexible connecting arms 21, referring to the embodiment shown in fig. 8, in a natural state, the flexible connecting arms 21 extend along a straight line, an included angle between the extension path of the flexible connecting arms 21 and the extension path of the air supply channel 13 is a fitting angle 215 of the nasal cavity closure assembly 2, and the angle range of the fitting angle 215 is 30 degrees to 75 degrees. The natural state refers to the product form of the flexible connecting arm 21 in the state of self standing without the action of external force. In the figure, the fitting angle 215 is 55 to 65 degrees. The fitting angle 215 is intended to adjust the ergonomic properties of the nasal cavity closure assembly 2. In addition to the adjustment of the fitting angle 215, it can also be adjusted by deformation of the flexible connecting arm 21 itself. The flexible connecting arm 21 is connected with the mouthpiece body 1 through a base 211, and the base 211 is positioned above the air supply channel 13. The flexible connecting arm 21 comprises a base 211 connected with the mouthpiece body 1, an adapting seat 212 connected with the flexible plug 22 and a connecting part 213 arranged between the base 211 and the adapting seat 212, wherein the connecting part 213 is provided with an adjusting rib 214 which is convex or concave compared with the surface of the connecting part. In the drawing, the adjustment rib 214 protrudes from the surface of the connection portion 213. The setting of adjusting the muscle 214 can make things convenient for the nimble mechanical properties parameter that changes connecting portion 213 to improve the adaptability of nasal cavity sealing assembly 2.

In the arrangement of the occlusion cavity 11, referring to the embodiment shown in the drawings, the side wall of the occlusion cavity 11 is a semi-enclosed structure, two occlusion parts 12 are provided and are respectively located at two sides of the air supply channel 13, and one side of the occlusion part 12 away from the side wall of the occlusion cavity 11 is provided with a raised limiting wall 121. The retaining wall 121 can provide a stable bite location, thereby improving safety and providing a structural basis for improved breathing mouthpiece fit.

In a unitary structure, the mouthpiece body 1 and the nasal cavity closure assembly 2 may be integrally formed, but may increase the difficulty of production. Referring to the embodiment shown in the drawings, the mouthpiece body 1 is of unitary construction. The nasal cavity sealing component 2 is of an integrated structure. The mouthpiece body 1 and the nasal cavity sealing component 2 are connected through bonding, welding, clamping and other processes. After the connection is completed, the two form an integral structure, and the stability in the using process is ensured.

In conjunction with the above, it will be readily appreciated that the breathing apparatus disclosed herein may be flexible in different scenarios.

Referring to fig. 4 to 5, the application discloses a fire fighting helmet, which comprises a helmet 7 and the above-mentioned separate air source breathing device, wherein the air bottle 3 of the separate air source breathing device is installed on the helmet 7, the medium-pressure hose 5 is wound around the helmet 7, and the bite-holding component is detachably positioned on the helmet 7.

In a specific product, a high-pressure gas cylinder 3 of 0.25L and 30MPa and a cylinder head valve (namely a primary pressure reducing valve 4 in the above) are connected with a special respirator head (namely a breathing mouthpiece in the above) through a medium-pressure hose 5 of which the length is about 50 centimeters, the high-pressure gas cylinder 3 and the special respirator head are respectively fixed at two sides of the top of a helmet 7, the special respirator head is conveniently taken when the respirator is used, the special mouthpiece can be rapidly gripped, the nasal cavity is simultaneously plugged and can not breathe, and the breathing through the oral cavity is forced, and the service time is more than 4 minutes. The breathing gas required for rapidly crossing the fire zone when forest firemen are trapped by mountain fire can be basically met.

The whole set of the appliance adopts aluminum alloy, carbon fiber, flame-retardant plastic and edible flame-retardant silicon rubber materials, is safe, portable and reliable, and has the whole weight of about 600-700 g.

The device has the advantages that the helmet 7 is fully utilized to fix the gas cylinder 3, additional packages are reduced, goggles carried by the helmet 7 are utilized, the cost is saved, and the operation is more convenient.

Referring to fig. 1, the application discloses a portable rescue device, which comprises a containing assembly and the separated air source breathing device, wherein the separated air source breathing device is contained in the containing assembly.

In a specific product, a high-pressure gas cylinder 3 with the pressure of 0.3L-0.6L and the pressure of 30MPa is added with a cylinder head valve (namely, the primary pressure reducing valve 4) to connect a special respirator head (namely, the breathing mouthpiece above) through a medium-pressure hose 5 with the length of about 1 meter, the high-pressure gas cylinder 3 uses a special gas cylinder 3 sheath to fix the gas cylinder 3 on a waistband part of a user or a back plate of a backpack air breathing, the special respirator head is fixed on a proper position which is convenient to take in front of the chest of the user, the special mouthpiece can be rapidly taken by the head when in use, a nasal cavity is simultaneously plugged to be incapable of breathing, the breathing through the oral cavity is forced, the using time is more than 5 minutes according to the size of 0.3L of the configured high-pressure gas cylinder 3, and the using time is more than 10 minutes according to the size of 0.5L. The use scene can be used for escaping from firemen and life preservers for forest fire fighting, urban fire fighting and water rescue, and can also be used for personal escaping through proper training, such as high-rise escaping and escaping in a car falling water vehicle, and can also be used for underwater operation accident-prevention escaping in special scenes. And a short-time breathing operation in a narrow space where the air breathing apparatus cannot be used when a firefighter is performing fire-fighting rescue. Can be conveniently used without help of people. Can be taken and put into use even under difficult conditions, such as in the dark, again without undue effort.

The whole set of the device adopts aluminum alloy, carbon fiber, flame-retardant plastic and edible flame-retardant silicon rubber materials, is safe, light and reliable, and has the whole weight of about 600-900 g.

The whole set of equipment does not have a locking mechanism, but necessary protective measures, such as arranging a screw cap for preventing mistaken pressing and exhausting at the top end of a special respirator head, preventing misoperation when the respirator head is not used, and easily finding out that the respirator head is in a rated working pressure state by naked eyes even if misoperation occurs, for example, checking a pressure gauge before the respirator head is ready to be used to detect whether the pressure gauge is in the rated working pressure state or not.

The device is provided with some auxiliary devices such as: the package of the gas cylinder 3, the simple flame-retardant goggles and the like have the greatest advantages of convenient carrying and convenient operation.

The length of the medium-pressure hose can be further increased on the basis of portable rescue equipment, so that the use requirements of different scenes are met. For example, a dedicated respirator head is connected to a 0.5L,30MPa high-pressure gas cylinder 3 and a cylinder head valve through a medium-pressure hose 5 with a length of about 50 to 100 meters, and the special mouthpiece is gripped by a taking head when in use, the nasal cavity is simultaneously blocked and the respirator cannot breathe, so that the respirator is forced to breathe through the oral cavity, and the using time is longer than 10 minutes. The use scene can be used for the breathing operation of the short time of the narrow space that can't use the empty equipment of breathing when the city fire control is put out a fire and is rescued. Some chemical enterprises' clearance space is inconvenient to wear the equipment of breathing aloft to and like when rescue such as earthquake, need carry the breathing air supply to the personnel of being rescued, because the space is special, narrow or inconvenient carry great breathing equipment. The equipment can be used for conveying the respirator head to a rescued person by a user to bring the respirator head into a special respirator head or using an auxiliary tool, and the user can be guided to use the equipment when necessary.

In fig. 10, the present application further provides an expandable rescue apparatus, which includes the above-mentioned separated gas source breathing apparatus, and an expansion assembly, where the expansion assembly includes an inflation bridge and an expansion gas cylinder, and the gas cylinder is communicated with the expansion gas cylinder through the inflation bridge. In some rescue scenes, long-time endurance needs to be met, the technical scheme in the embodiment can connect a large-volume expanded gas cylinder 81 (refer to the gas cylinder shown in the attached drawing, such as a gas cylinder of 6.8 liters and 30 MPa) with the above-mentioned 0.5L gas cylinder 3 through a special gas-filled bridge 8, and the expanded gas cylinder 81 can be used for more than 2 hours due to capacity expansion. And during the use process, the extended gas cylinder 81 can be continuously replaced to further improve the endurance.

Wherein, the service time is tested and calculated based on the respiratory flow of 30L/min (respiratory frequency of 20 times/min).

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. Features of different embodiments are shown in the same drawing, which is to be understood as also disclosing combinations of the various embodiments concerned.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims (10)

1. Disconnect-type air supply respiratory device, its characterized in that includes and connects gradually according to the gas flow direction:

a gas cylinder for providing high pressure gas;

the primary pressure reducing valve is arranged on the gas cylinder and is used for reducing the pressure of high-pressure gas in the gas cylinder to a first pressure;

the medium-pressure hose is used for receiving and conveying medium-pressure gas at the first pressure;

the breathing pressure reducing valve is used for receiving and reducing the medium-pressure gas with the first pressure to a second pressure suitable for breathing;

the breathing mouthpiece is used for receiving and conveying the low-pressure gas with the second pressure for breathing;

the breath pressure reducing valve and the breath mouthpiece are assembled into a biting component, and the biting component has an accommodating state close to the gas cylinder and an opening state far away from the gas cylinder; the first-stage pressure reducing valve is provided with a cut-off valve for controlling the opening of the gas circuit; and in the opening state, the biting assembly is linked to open the block valve.

2. The split gas source breathing device as recited in claim 1, wherein the primary pressure reducing valve comprises a primary valve body mounted on a head of the gas cylinder, and a primary pressure reducing valve core, a safety valve and the shut-off valve mounted inside the primary valve body, the safety valve and the shut-off valve being in communication with each other.

3. The split-gas source breathing device of claim 2 wherein the shut-off valve comprises:

a cut-off valve rod having a cut-off state and an opposite open state that cut off the primary pressure reducing valve spool and the outlet of the primary pressure reducing valve;

and the control bolt is used for keeping the stop valve rod in the stop state and is linked with the biting component through a control cable.

4. The split gas source breathing device of claim 1 wherein the breathing relief valve comprises:

the secondary valve body is connected with the breathing mouthpiece;

the control diaphragm is hermetically arranged on the secondary valve body and provided with a trigger position responding to the airflow state of the breathing mouthpiece and a standby position in a natural state;

and the secondary pressure reducing valve core is controlled by the control diaphragm.

5. The split-type gas source breathing device as claimed in claim 4, wherein the breathing pressure reducing valve further comprises an exhaust diaphragm, the exhaust diaphragm is installed on the secondary valve body in a one-way sealing mode, and the response state of the exhaust diaphragm and the response state of the control diaphragm are opposite relative to the gas flow state of the breathing mouthpiece;

the two-stage decompression chamber and the air flow channel which are communicated with each other are arranged in the two-stage valve body, the exhaust diaphragm and the control diaphragm are respectively installed on two sides of the air flow channel, the extending axial direction of the two-stage decompression chamber points to the control diaphragm to be arranged, and the two-stage decompression valve core is installed in the two-stage decompression chamber.

6. The breathing device as defined in claim 5, wherein the secondary pressure reducing valve core comprises a secondary pressure reducing valve rod movably mounted in the secondary pressure reducing chamber, and a control rocker arm assembly hinged to the secondary valve body, the control rocker arm assembly being acted on by the control diaphragm to drive the secondary pressure reducing valve rod to move to a corresponding position.

7. The split gas source breathing device of claim 1 wherein the breathing mouthpiece comprises:

the mouth piece body comprises an occlusion cavity for providing occlusion space, an occlusion part arranged on the inner wall of the occlusion cavity and an air supply channel for communicating the occlusion cavity with an air source;

the nasal cavity closing assembly comprises a flexible connecting arm extending from the mouthpiece body and a flexible plug arranged at the end part of the flexible connecting arm, and the outer diameter of the flexible plug is gradually reduced in the direction away from the mouthpiece body.

8. A fire fighting helmet comprising a helmet on which a gas cylinder of a separate gas source breathing apparatus is mounted, and a separate gas source breathing apparatus according to any one of claims 1 to 7, the medium pressure hose being provided around the helmet, the bite-holding assembly being removably positioned on the helmet.

9. Portable rescue apparatus comprising a housing assembly and a separate air source breathing apparatus according to any of claims 1 to 7 housed within the housing assembly.

10. An expandable rescue apparatus comprising a split gas source breathing apparatus according to any of claims 1 to 7 and an expansion assembly comprising a gas bridge and an expansion cylinder, the cylinder being in communication with the expansion cylinder via the gas bridge.

Images