JPS599644Y2 - Safety valve in respirator - Google Patents

Description

[Detailed description of the invention] This invention operates when a gas such as air or oxygen supplied from the main body of the respirator reaches an abnormal pressure, and discharges a part of the gas to the outside. This invention relates to a safety valve in a ventilator that allows only a minute pressure to be applied to the patient.

Respirator equipment is used by hospitals and rescue teams to promote breathing and revive patients who require it or who have died due to submersion in water, etc., and to resuscitate patients by restarting breathing. It is well known that it is effective.

There are two main types of such respirators: volume-controlled and pressure-controlled. For example, in a pressure-controlled type, there is usually an inhalation pipe that supplies gas to the patient and an exhalation pipe that discharges exhaled air. An exhalation valve is connected to the artificial respiration mask and is pneumatically closed during inhalation and opened during exhalation, so that the patient can breathe effortlessly at a timing appropriate to his or her condition. It is something that exists.

Therefore, a ventilator that functions in this manner is required to operate accurately and without failure.

In addition, if a failure occurs in the ventilator itself and the gas supplied to the patient becomes abnormally high, the safety devices (e.g. safety valves) that are naturally attached to the ventilator will operate. It is designed not to cause any harm to the human body.

For example, in a conventional safety device, as shown in FIG.
A safety valve main body 2 consisting of an abnormal pressure gas inlet 2C and an abnormal pressure gas outlet 2d, which are provided on the side and communicate with the passage 4 side that supplies gas to the patient (arrow A) side, and an inner surface of the main body 2. A lid 5 that is screwed into a threaded part 2e to seal the main body 2 (however, the discharge port 2d is open), and a threaded part 5a in the center of the lid 5. a spring receiver 6 for adjusting the operating pressure by abnormal pressure gas, which has a threaded portion 6a at one end and a spring receiver 6b at the other end;
A lock nut 7 is screwed into the threaded portion 6a of the valve body 2 to adjust the operating pressure, a valve body 9 is located inside the main body 2 and is press-fitted to the valve seat 2b by a spring 8, and one end is attached to the spring receiving portion 6b. A spring 8 has the other end attached to the valve body 9 and can be expanded and contracted depending on the magnitude of abnormal gas pressure, and one end is fixed to the center of the valve body 9 and the other end can be slid up and down inside the spring receiver 6. Since the guide rod 9A is installed at
Then, the valve body 9 is pressed and floated in the opposite direction against the pressure of the spring 8 to form an abnormal pressure gas communication port between the valve seat 2b and the valve body 9, and the abnormal pressure gas is discharged from the discharge port 2d. The gas supply pressure is normally maintained at 35 to 50 (cmHzO).

Therefore, by knowing that the safety valve is operating by looking at the attached meter, etc., it is possible to prevent life-threatening danger by replacing the ventilator with another one that operates normally.

However, even if the safety valve 1 as described above operates, if the operation cannot be detected, or even if the operation can be detected by other warning devices, other normal operation may be performed instantly. 3 if not using a respirator
Since a gas pressure of 5 to 50 CcmH20] is constantly supplied to the patient, some patients may not be able to spontaneously exhale against the supplied gas pressure, which may endanger their lives.

This invention was made in view of the above points, and this invention is
An abnormal pressure gas outlet is provided in the safety valve main body, two abnormal pressure gas inlets are provided at a predetermined interval and communicate with a passage for supplying gas to the patient side in the ventilator main body, and one of the above inlet ports is provided. Used to introduce gas from the passage side into the safety valve main body, and closing the other introduction port with a retractable cap body, and closing the introduction port by abutting the open end of the introduction port. A spring is interposed between the valve body and the main body of the respirator, a locking member is provided for locking the valve body so as to close the inlet, and the inlet is provided with a locking member that locks the valve body so as to close the inlet. A respirator comprising a movable member that is pressed and moved when the cap body is expanded by the introduced gas and opens the inlet by releasing the locking action of the locking member. By providing a safety valve, even if there is a failure on the ventilator body side and abnormal pressure gas is generated, very small pressure (almost zero pressure) will be delivered to the patient side.
To prevent the danger to life due to the phenomenon of abnormal pressure gas flowing in one direction by making it possible for the patient to easily exhale spontaneously against the extremely low pressure gas being supplied. With the goal.

Furthermore, in the safety valve, when the valve body floats to keep the gas inlet open, a predetermined portion of the member that floats in conjunction with this is exposed to the outside of the safety valve body, and this exposed portion is used as the safety valve body. By providing a safety valve in a ventilator that is used as an activation warning display, when the safety valve is activated, there is an abnormality in the operation within the ventilator body and abnormal pressure gas is generated.
The goal is to be able to warn people that the ventilator is experiencing a gas blow-off phenomenon and should be replaced with another normally functioning ventilator as soon as possible.

Hereinafter, the safety valve 1' of the present invention will be explained with reference to FIG. 2 of the drawings.

The safety valve 1' is used by being attached to a respirator main body 3 having a passage 4 therein for supplying gas to the patient (arrow A) side, and has a safety valve main body 2 that functions as a protective cover.

The safety valve main body 2 is an open box having an abnormal pressure gas outlet 2d for discharging the abnormal pressure gas supplied to the patient from the respirator main body 3 side.

The structural elements of the present invention described below are built into the inner cavity of the planar safety valve body 2.

Abnormal pressure gas inlets 10a, lla communicating with the passage 4
An abnormal pressure gas introduction cylinder 10 and an abnormal pressure gas introduction pipe 11 are arranged at predetermined intervals.

A valve seat 10b made of a rubber member or the like is provided at the open end of the inlet 10a.

The open end of the gas introduction pipe 11 is sealed with an open cap body 12.

This cap body 12 is expandable and expandable by the gas introduced from the gas inlet 11a, and is made of metal or rubber bellows.5. This opening end is the introduction pipe 11
The top surface is thickened to make it rigid, or
Another rigid body 13 is attached to allow the cap body 12 to extend and contract normally.

The valve body 14 is a plate-like body shaped to a size that can close the gas inlet 10a (opening valve seat 10b) and cut off communication with the bus discharge port 2d, and the safety valve 1' is set therein. When this occurs, the gas inlet 10a is closed in close contact with the valve seat 10b as shown in FIG.

The guide rod 15 is slidably inserted through a through hole 16 a of a locking member 16 installed upright in the respirator main body 3 , one end of which abuts the rigid body 13 , and the other end of the guide rod 15 abuts against the rigid body 13 . A lock nut 17 for adjusting abnormal gas pressure is screwed into a threaded portion 15a provided in the screw portion 15a.

Each end of the spring 18 is fixed between the valve body 14 and the ventilator main body 3, and presses the valve body 14 from below in the direction of arrow C.

The locking member 19 is rotatably attached to the respirator main body 3 via a shaft 20 at one end.

The locking pin 21 is wound around the shaft 20, is locked to the locking member 19 and the ventilator main body 3, and has a spring action that causes the locking member 19 to pivot in the opposite direction of arrow F.

The locking member 22 is a rod with one end fixed to the center of the upper surface of the valve body 14 and provided upright above the valve body 14, and has a threaded portion screwed into the reset button 23 at the other end. 22a is screwed on.

The reset button 23 is housed in the gas discharge port 2d and has a function as an activation warning display for the safety valve 1'.

That is, the reset button 23 is defined in advance as a safety valve activation warning display member, and when it largely protrudes from the gas discharge port 2d of the safety valve body 2, it can be recognized that the safety valve 1' is in an activated state. .

In this case, if the reset button 23 is painted in two different colors, for example, the upper part is black and the lower part is red, when the lower red part appears, the safety valve 1' is activated. It functions as an abnormal gas pressure generation warning device.

The locking member 24 is rotatably attached to the locking member 16 by a shaft 25, one end is fixed to the locking member 22 from a right angle direction, and the other end is fixed to the other end of the locking member 19. It is placed on the raised protrusion 19a.

Therefore, when the gas supplied from the ventilator main body 3 side to the patient (symbol A) reaches an abnormal pressure, the cap body 12 is inflated by the abnormal pressure gas supplied from the inlet 11a and extends in the direction of arrow D.

As a result, the guide rod 15 is moved to the left in the direction of arrow E,
A lock nut 17 provided on the guide rod 15 comes into contact with the locking member 19, and causes the locking member 19 to pivot in the direction of arrow F against the spring action of the locking pin 21.

As a result, the locking action of the locking members 24 and 22 that try to block the gas inlet 10a with the valve body 14 is released, and the valve body 14 is pushed upwardly and floated high by the pressing force of the spring 18, and the valve body 14 is pushed upwardly and released. The stop member 24 pivots in the direction of arrow G to form an abnormal pressure gas discharge path between the valve seat 10b and the valve body 14.

By passing the gas through this exhaust path, the gas can be exhausted from the exhaust port 2d.

When the valve body 14 floats upward, the reset button 23 protrudes to the outside of the safety valve body 2 and displays a safety valve activation warning display.

Further, when the safety valve 1' is activated, it can be reset to its original state by pressing the reset button 23 downward.

That is, when the safety valve 1' is in the normal state, the cap body 12 is contracted and the locking member 19 is turned in the opposite direction of arrow F, so that the locking member 24 is in the state shown in FIG. and 22
Therefore, the valve body 14 again closes and holds the opening of the valve seat 10b.

The locking members 19, 24 and 22, the valve body 14 and the reset member 23 thus function as a reset device for the safety valve 1'.

As shown in the above embodiment, the present invention differs from the conventional safety valve 1 in which the inlet port 2C is closed by the valve body 9 using the pressure of the spring 8, but in the safety valve 1' of the present invention, the pressure of the spring 18 is Since the valve element 14 that closes the inlet port 10a is pressed and floated using pressure, it is possible to easily form an expanded gas discharge path between the valve seat 10b and the valve element 14.

Therefore, when the safety valve 1 is activated, the gas supply pressure is maintained at 35 to 50 (crnHzo:), whereas the safety valve 1' of the present invention maintains most of the abnormal pressure from the gas outlet. Since the gas is expelled and only a very small pressure (nearly zero pressure) is allowed to flow to the patient, the patient can easily exhale spontaneously against the very small pressure gas being supplied, putting life at risk. It has the effect of being able to prevent this.

Furthermore, when the safety valve 1' is activated, the reset button 23 is pressed against the safety valve body 2 by the pressing force of the spring 18.
The safety valve 1 protrudes from the outside, so by looking at it
It is easy to know from the outside that ′ has been activated.

As described above, when the safety valve of the present invention is activated, it has the effect of applying only a small amount of pressure to the patient side as a safety device, and when the safety valve activates, it can display an activation warning message. The practical effect is enormous.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing the relationship between the ventilator main body side passage and a conventional safety valve, and FIG. 2 is a longitudinal sectional view showing the relationship between the ventilator main body side passage and the safety valve of the present invention. Explanation of symbols 1... Conventional safety valve, 1'...
... Safety valve of the present invention, 2 ... Safety valve body, 2
a...Cylinder-shaped part, 2b...Valve seat,
2C...Abnormal pressure gas inlet, 2d...
Abnormal pressure gas outlet, 2e...Threaded part, 3...
...Respirator body, 4...Aisle, 5...
...Lid body, 5a...Thread part, 6...
Spring receiver for operating pressure adjustment, 6a...screw part, 6b...spring receiver, 7...
Abnormal gas pressure adjustment lock nut, 8... Spring, 9... Valve body, 10... Abnormal pressure gas introduction cylinder, 10 b... Valve seat , 10a,
lla... Abnormal pressure gas inlet, 11...
・Abnormal pressure gas introduction pipe, 12... Cap body, 13...
... Rigid body, 14 ... Valve body, 15 ...
・Guide rod, 16... Locking member, 16 a...
...Through hole, 17...Lock nut for adjusting abnormal gas pressure, 18...Spring, 19...
...Locking member, 19 a... Protrusion, 20...
...shaft, 21 ... locking pin, 22 ...
...Locking member, 22a...Thread part, 23...
...Reset button, 24...Latching member,
25... Axis.

Claims (2)

[Scope of utility model registration request] (1) An abnormal pressure gas outlet 2d is provided in the safety valve body 1, and abnormal pressure gas inlets 10a, lla are connected at a predetermined interval to communicate with the passage 4 for supplying gas to the patient side in the ventilator body 3. one of the inlet ports 10a is connected to the passageway 4;
Used to introduce gas from the side into the safety valve body 2,
The other introduction port 11a is closed by a telescopic cap body 12, and a valve body 14 is provided which can close the introduction port 10a by abutting against the open end of the introduction port 10a, and the valve body 14 A spring 1 is placed between the
8, and locking members 16, 19, 22.24 are provided to lock the valve body 14 so as to close the introduction port 10a.
When the locking members 16 and 19 expand, they are pressed and moved.
, 22. 1. A safety valve for a respirator, characterized in that a moving member 15, 17 is provided for opening the introduction port 10a by releasing the action of acting on the valve body 14 and locking the valve body 14. (2) Scope of Utility Model Registration In the safety valve according to claim 1, the respirator is characterized in that the reset button 23 provided on the locking member 22 is used as a safety valve activation warning display member. safety valve.