KR102250203B1 - Demand valve of air respirator - Google Patents

Abstract

The demand valve of the air breathing apparatus is started. The demand valve of the air breathing apparatus according to the embodiment includes a mask worn on the face and an air container connected to the mask and the hose, is formed in the mask and connected to the hose, and reduces the air pressure, and the upper part is opened and the inside A body having an accommodation space formed therein, an air inlet through which air is introduced into the receiving space by coupling a hose connected to the air cylinder, and an air outlet through which air is drawn out; A cover coupled to the upper portion of the body, a thin film member is formed at the center portion of the cover, and a support membrane member is provided at an outer periphery of the thin film member so as to be inclined downwardly, and a diaphragm coupled to the upper portion of the body, and the diaphragm An opening/closing operation unit formed in the center of the bottom surface and configured as an elevating shaft inserted into the receiving space; And a bushing coupled to the air inlet, and an opening and closing member coupled to the bushing and having one end coupled to the lifting shaft and having a packing formed at the other end to open and close the air inlet.
According to this, the hose connected to the air cylinder and the air inlet are connected, and after the air inlet is connected to the mask, the opening and closing of the air inlet can be controlled by the pressure by exhalation, and the air pressure can be lowered to be suitable for breathing. It is concise and has the effect of lowering the cost.

Description

Demand valve of air respirator

Disclosed content relates to a demand valve of an air breathing apparatus, and more particularly, to a demand valve of an air breathing apparatus that is provided in an air hose connecting an air cylinder and a mask to lower the pressure so that final breathing can be performed.

Unless otherwise indicated herein, it is expressly stated that the content described in this section is not prior art to the claims of this application, and inclusion in this section is not admitted to be prior art.

Disasters put people at risk by generating heat, flames, and toxic gases. It is known that 2 to 5 minutes after a fire occurs, toxic gases and smoke lead to suffocation.

Air breathing devices are being used to protect people from these dangers.

The air breathing device is worn by workers in industrial sites where dust and harmful gases are generated, workers in oxygen-deficient places, fires in subways, etc. and lifeguards (firefighters) at fire sites to protect the face while inhaling gases that are harmful to the human body. It is used to prevent.

Meanwhile, air breathing devices are used to keep breathing stable even in underwater activities such as scuba diving.

According to an example, Korean Patent Application Laid-Open Publication No. 10-2006-0071061 "emergency air breathing apparatus" is disclosed.

The conventional emergency breathing apparatus is provided with a mask that blocks the nose and mouth from the outside, and an air container connected with the mask and a hose.

Meanwhile, air is transported from the reservoir through a hose and supplied to the mask to be used for breathing.When it is ejected from the reservoir, the primary pressure is adjusted through the regulator, and the secondary pressure is adjusted by a pressure reducing valve formed at the connection between the hose and the mask. Try to reduce it to a pressure suitable for breathing.

Conventional pressure reducing valves provided in masks, that is, demand valves, have a complicated structure, are expensive, and have difficulty in maintenance.

Korean utility model application 20-2008-0009873

The disclosed content is connected to a hose and provided on a mask to lower the air pressure to a pressure suitable for final breathing, and the configuration is concise to reduce the manufacturing cost, and to provide a demand valve for an air breathing apparatus that facilitates maintenance. There is a purpose.

The purpose of the examples is,

It includes a mask worn on the face and an air container connected by a mask and a hose, is formed in the mask and connected to a hose, and reduces air pressure so that it can be used for breathing,

A main body having an upper opening and an accommodation space formed therein, an air inlet through which air is introduced into the receiving space by coupling a hose connected to the air cylinder, and an air outlet through which air is drawn out;

A cover coupled to the upper portion of the body, a thin film member is formed at the center portion of the cover, and a support membrane member is provided at an outer periphery of the thin film member so as to be inclined downwardly, and a diaphragm coupled to the upper portion of the body; An opening/closing operation unit formed in the center of the bottom surface and configured as an elevating shaft inserted into the receiving space;

A demand valve of an air breathing apparatus comprising a bushing coupled to the air inlet, an opening member coupled to the bushing and having one end coupled to the lifting shaft and formed with a packing on the other end to open and close the air inlet. Can be.

According to the disclosed embodiment, the hose connected to the air cylinder and the air inlet are connected, the outlet is connected to the mask, and then the opening and closing of the air inlet can be controlled by the pressure due to exhalation, and the air pressure can be lowered to be suitable for breathing. However, since the configuration is simple, costs can be lowered, and maintenance can be facilitated, so there is an effect that can be applied to the mask of the air respirator used by firefighters or the mask of the air respirator used in scuba diving. have.

1 is a perspective view showing the configuration of an air breathing apparatus,
2 is a perspective view showing a demand valve of an air breathing apparatus according to an embodiment;
3 is an exploded perspective view showing a demand valve of an air breathing apparatus according to an embodiment;
4 is an exploded perspective view of a demand valve of an air breathing apparatus according to an embodiment;
5 is a cross-sectional perspective view of a demand valve of an air breathing apparatus according to an embodiment;
6 is a cross-sectional view showing a low open state of a demand valve of an air breathing apparatus according to an embodiment;
7 is a cross-sectional view showing a high open state of a demand valve of an air breathing apparatus according to an embodiment;
8 is a cross-sectional view showing a closed state of a demand valve of an air breathing apparatus according to an embodiment.

Hereinafter, preferred embodiments will be described in detail based on the accompanying drawings.

The embodiments to be described below are intended to be described in detail enough to allow those of ordinary skill in the art to carry out the invention easily, thereby limiting the technical spirit and scope of the present invention. I don't mean it.

In addition, the size or shape of the constituent elements shown in the drawings may be exaggerated for clarity and convenience of description, and terms specially defined in consideration of the configuration and operation of the present invention vary according to the intention or custom of users and operators. It should be noted that, and definitions for these terms should be made based on the contents throughout the present specification.

In the accompanying drawings, FIG. 1 is a perspective view showing the configuration of an air breathing apparatus, FIG. 2 is a perspective view showing a demand valve of an air breathing apparatus according to an embodiment, and FIG. 3 is a demand valve of the air breathing apparatus according to an embodiment. Shown an exploded perspective view, FIG. 4 is an exploded perspective view of a demand valve of an air breathing apparatus according to an embodiment, FIG. 5 is a cross-sectional perspective view of a demand valve of an air breathing apparatus according to an embodiment, and FIG. 6 is air breathing according to an embodiment A cross-sectional view showing a low open state of the demand valve of the device, FIG. 7 is a cross-sectional view showing a high open state of the demand valve of the air breathing apparatus according to an embodiment, and FIG. 8 is a closing of the demand valve of the air breathing apparatus according to an embodiment It is a cross-sectional view showing the state.

As shown in Figure 1, the air breathing device is worn on the face such as the nose and mouth to block from external air contact with a mask (M), and an air cylinder (T) connected by a mask (M) and a hose (H). ).

A regulator (not shown) is coupled to the valve of the air cylinder T to lower the pressure and maintain a positive pressure, and one end of the hose H is coupled to the regulator.

The other end of the hose H is connected to the demand valve A of the mask M, so that air can be sucked from the air cylinder T.

2 and 3, the demand valve (A) of the air breathing apparatus,

A main body 100 having an air inlet 120 to which the hose H is connected and an air outlet 140 to which the mask M is connected;

An opening/closing operation unit 200 coupled within the main body 100 and interlocking according to breathing to control inhalation and discharge;

And an opening/closing member 300 formed in the air outlet 140 and interlocking with the opening/closing operation unit 200 to control the opening and closing of the air outlet 140.

The main body 100 is opened at the top so that the cover 110 is coupled, a receiving space 102 is formed therein, and a hose H connected to the reservoir T is coupled to allow air to be transferred to the receiving space 102. An air inlet 120 to be introduced and an air outlet 140 connected to the mask M to allow air to be drawn out are formed.

The opening/closing operation unit 200 is in close contact with the lower portion of the cover 110 and has a thin film member 221 formed at the center thereof, and a support film member 222 is provided on the outer periphery of the thin film member 221 to provide the main body 100 ), and a diaphragm 220 coupled to the upper portion of the diaphragm 220, and an elevating shaft 230 formed at the center of the bottom of the diaphragm 220 and inserted into the receiving space 102.

The diaphragm 220 is formed by concave circularly concave support membrane member 222 having a thin thickness, and the thin film member 221 is formed in the center of the support membrane member 222.

The outer periphery of the support membrane member 222 is coupled to the upper opening of the main body 100, and the support membrane member 222 contracts or expands as the pressure in the receiving space 102 of the main body 100 fluctuates. The up and down lifting operation of 221 is performed.

That is, since the support membrane member 222 is made of a very thin film, when suction pressure is generated through the air outlet 140, the support membrane member 222 contracts toward the interior of the receiving space 102, and interlocks with the film. The member 221 is lowered.

On the other hand, when the suction pressure is released, the thin film member 221 rises due to the restoring force of the support membrane member 222 and returns to the original state.

The lifting shaft 230 is vertically formed in the center of the bottom of the thin film member 221, and the operating hole 232 is vertically formed in the lower portion of the lifting shaft 230.

The rod 310 of the opening/closing member 300 to be described later is fitted and coupled to the operation hole 232.

The opening and closing member 300 is coupled to the bushing 350 coupled to the air inlet 120, the bushing 350, one end is coupled to the lifting shaft 230, and a packing 340 is formed at the other end to form an air inlet It consists of a rod 310 to open and close 120.

The rod 310 has one end connected to the rod head 320 and formed horizontally, and the rod head 320 has a disk shape.

The packing 340 is in close contact with the halving jaw 342 of the air inlet 120, is penetrated to the rod 310 and is in close contact with the rod head 320, and when the opening and closing member 300 is tilted, the packing ( The high-pressure air is introduced through the spaced gap between the 340 and the rod head 320.

As shown in the enlarged view of FIG. 8, the packing 340 is in close contact with the rod head 320 so that the sealed state can be maintained.

The bushing 350 has a cylindrical shape and has a long hole formed at one end so that the rod 310 can be inserted, and the other end has a hwanjak 342 on which the rod head 320 is seated.

The packing 340 is coupled between the hwanjak 342 of the bushing 350 and the rod head 320 to exert a sealing force.

The hose connector 600 is connected to the hose (H) connected to the reservoir (T).

On the other hand, the main body 100 is formed in the receiving space 102, the braking unit 500 for fixing or releasing the lifting operation of the lifting shaft 230 of the diaphragm 220; A locking part 400 formed outside the main body 100 and controlling on-off of the braking part 500; is further included.

The brake unit 500 is

A hinge pin 521 having both ends fitted to the inner circumferential surface of the receiving space 102 of the main body 100, and one end is fixed to the hinge pin 521 and the other end is formed horizontally, and the lifting shaft 230 of the diaphragm 220 ) A support lead 520 in which a slit 522 is inserted;

A stopper lead 540 connected to the hinge pin 521 to be inclined downward and formed to have an obtuse angle with the support lead 520;

And guide leads 560 connected to the hinge pin 521 and formed at the same inclination angle as the stopper lead 540 and formed on both sides.

The support lead 520 is connected to the third spring 523 connected to the inside of the main body 100 to have elasticity capable of returning to the original state after the hinge pin 521 is rotated.

The hinge pin 521 is horizontally coupled across the receiving space 102 of the main body 100, and the support lead 520 and the guide leads 560 on both sides of the hinge pin 521 are inclined downward to one side. Is formed,

A support lead 520 is formed horizontally on the other side of the hinge pin 521.

The slit of the support lead 520 is formed long with one end open, and the lifting shaft 230 is fitted and coupled to the slit 522.

Accordingly, the lifting shaft 230 moves up and down through the slit 522, and guides the lifting operation to be maintained in the vertical direction.

As shown in Figure 3, the locking part 400,

A fixed shaft 420 inserted into a through hole formed on one side of the main body 100 and in contact with the stopper lid 540 and having a head 422 formed on one side thereof;

A second spring 426 coupled to the fixed shaft 420 and supported around the through hole of the main body 100;

It includes a button 428 coupled to the head 422.

Therefore, referring to FIG. 5, when the button 428 is pressed, the fixed shaft 420 is inserted, the second spring 426 is contracted, and the tip of the fixed shaft 420 is closely supported at the lower end of the stopper lid 540. Thus, the stopper lid 540 may be fixed in a lifted state.

Therefore, since the support lead 520 is fixed in a state coupled to the lifting shaft 230, the lifting shaft 230 may be stopped so that the vertical operation is not possible to be maintained in a fixed state (see FIG. 8).

When the lifting shaft 230 is fixed in this way, the operation of the opening/closing member 300 is also stopped, so that air cannot be introduced from the outside.

Hereinafter, an opening/closing operation of the demand valve of the air breathing apparatus according to an embodiment will be described.

6 is a cross-sectional view showing a low open state of a demand valve of an air breathing apparatus according to an exemplary embodiment.

When breathing is weakly inhaled while wearing the mask M, a low-pressure suction force is generated through the air outlet 140, and accordingly, the diaphragm 220 descends.

When the lifting shaft 230 descends, the rod 310 is rotated downward, and a gap S is opened between the packing 340 and the rod head 320.

That is, as shown in the enlarged view of FIG. 6, the lower rib 344 of the packing 340 is spaced apart from the inner surface of the rod head 320 to create a gap.

A small amount of high-pressure air is introduced through the hose H through the gap formed in this way, and may be introduced into the mask M through the air outlet 140 through the accommodation space.

On the other hand, Figure 7 is a cross-sectional view showing a high open state of the demand valve of the air breathing apparatus according to an embodiment.

When inhaling weakly while wearing the mask M, a low-pressure suction force is generated through the air outlet 140, and accordingly, the diaphragm 220 descends.

When the lifting shaft 230 descends, the rod 310 is rotated downward, and a gap between the packing 340 and the inner surface of the rod head 320 is wider.

That is, as shown in the enlarged view of FIG. 7, the rib 344 on the lower side of the packing 340 is spaced apart from the rod head 320 to form a larger gap.

A large amount of high-pressure air is introduced through the hose H through the enlarged gap S created in this way, and may be introduced into the mask M through the air outlet 140 through the accommodation space.

Meanwhile, FIG. 8 is a cross-sectional view showing a closed state of a demand valve of an air breathing apparatus according to an exemplary embodiment.

When not breathing through the mask M, there is no pressure fluctuation in the main body 100, and the diaphragm 220 returns to its original state, so that the lifting shaft 230 rises.

As the lifting shaft 230 rises, the rod 310 is rotated upward to become a horizontal state, and the ribs 344 of the packing 340 are in close contact with the rod head 320 to become a closed state.

Therefore, the air is filled in the front of the rod head 320 and cannot be introduced into the receiving space 102 any more, so that the air may be in a closed state.

Meanwhile, referring to FIG. 8, when the button 428 of the left locking part 400 is pressed, the hook 424 is caught by the stepped jaw 427 after the fixing shaft 420 advances, and the fixed shaft ( The tip of the 420 is in close contact with the lower end of the stopper lid 540.

Therefore, since this state is in a locked state and the brake unit 500 is prevented from rotating, the lifting shaft 230 is fixed even when a suction force is generated, so that the opening and closing operation of the diaphragm 220 can be maintained in a stopped state.

Although it has been described in connection with the preferred embodiment, it will be readily recognized by those skilled in the art that various modifications and variations are possible without departing from the gist and scope of the invention, and all such changes and modifications fall within the scope of the appended claims. Is self-explanatory.

M: Mask H: Hose
100: main body 120: air inlet
140: air outlet 200: opening and closing operation part
220: diaphragm 230: lifting shaft
300: opening and closing member 310: rod
320: rod head 340: packing
344: rib 350: bushing
400: locking part 420: fixed shaft
424: hook 426: second spring
427: stepped 428: button
500: braking unit 520: support lead
540: stopper lead 560: guide lead
521: hinge pin 522: slit
S: gap

Claims (5)

It includes a mask worn on the face and an air container connected by a mask and a hose, is formed in the mask and connected to a hose, and reduces air pressure so that it can be used for breathing,
A main body having an upper opening and an accommodation space formed therein, an air inlet through which air is introduced into the receiving space by coupling a hose connected to the air cylinder, and an air outlet through which air is drawn out;
A cover coupled to the upper portion of the main body, a diaphragm coupled to the upper portion of the main body by having a thin film member formed at the center portion of the cover and being coupled to the lower portion of the cover, and having a support membrane member inclined downwardly at the outer periphery of the thin film member, and the diaphragm An opening/closing operation unit formed in the center of the bottom of the unit and configured as an elevating shaft inserted into the receiving space;
A bushing coupled to the air inlet, an opening and closing member coupled to the bushing, one end coupled to the lifting shaft, and a packing formed at the other end to form a rod for opening and closing the air inlet; and
A braking part formed in the receiving space of the main body and fixing or releasing the lifting operation of the lifting shaft of the diaphragm;
Includes; a locking part formed on the outside of the main body and controlling the on-off of the braking part,
The braking part
A support lead having a hinge pin having both ends fitted to the inner circumferential surface of the receiving space of the body, and having one end fixed to the hinge pin and the other end formed horizontally, and having a slit into which the diaphragm lift shaft is fitted;
A stopper lead connected to the hinge pin to be inclined downward and having an obtuse angle with the support lead;
A guide lead connected to the hinge pin, formed at the same inclination angle as the stopper lead, and formed on both sides;
Demand valve of an air breathing apparatus comprising a. The method of claim 1,
The opening and closing member
A plate-shaped rod head, and the rod has one end connected to the rod head and formed horizontally,
The packing is supported in close contact with the hwanjak of the air inlet, penetrated through the rod, and is in close contact with the rod head,
Demand valve of an air breathing apparatus, characterized in that when the opening and closing member is tilted, high-pressure air is introduced through a spaced gap between the packing and the rod head. delete delete The method of claim 1,
The locking part
A fixed shaft inserted into a through hole formed in the main body and in contact with a stopper lid, a hook formed on an outer surface, and a head formed at one side;
A second spring coupled to the fixed shaft and supported around the through hole of the main body;
Includes; a button coupled to the head,
A demand valve for an air breathing apparatus, characterized in that a stepped jaw is formed on the inner circumferential surface of the receiving space of the main body to be hooked or released around the through hole.

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