JPS5836982B2 - Kokiyuuki no Keihou Souchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an alarm device for preventing oxygen deficiency accidents due to insufficient gas remaining in a gas cylinder in a respiratory system.

Traditionally, a sounding body has been installed in the breathing circuit, and when the gas pressure in the cylinder falls below a certain level, the breathing gas passage in the breathing circuit becomes narrow, thereby obstructing the circulation of breathing gas, resulting in difficulty in breathing and the sound produced by the breathing gas. There are known alarm devices that issue an alarm based on the following.

This type has the disadvantage that breathing continues to be difficult after the alarm is activated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a respiratory alarm device which eliminates the above-mentioned drawbacks and allows the alarm to be canceled at will after the alarm is activated.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figure 1 shows a closed circulation breathing apparatus. The outlet of the breathing bag 1 is connected to an intake pipe 3 via an intake valve 2.

This intake pipe 3 is connected to the intake side of the mask 4.

One end of an exhalation pipe 5 is connected to the exhalation side of the mask 4, and its → end is connected to the inlet of a cleaning canister 7 via an exhalation valve 6.

The outlet of the cleaning canister 7 is connected to the inlet of the breathing bag 1.

This connection establishes a respiratory circuit consisting of a breathing belt, a mask, a clean can, and a breathing bag.

In order to replenish the oxygen consumed in the circuit, oxygen in the oxygen cylinder 8 is supplied to the intake side at a substantially constant flow rate via a stop valve 9, a pressure reducer 10, and a supply pipe 11.

Here, the characteristic part of the embodiment of the present invention is that the alarm sounding section 20 is provided on the intake side in the breathing circuit, and responds to the cylinder pressure by gas from the conduit 12 connected to the cylinder 8. The operating section 30 operates the alarm sounding section 20, and an alarm canceling section 50 is further provided in the middle of the conduit 12.

Referring to FIG. 2, in the sounding section 20, a reduced diameter section 22 is provided inside the first casing 21. As shown in FIG.

A valve plate 23 that can open and close this reduced diameter portion 22 is held by a sounding operation portion 30, which will be described later.

The valve plate 23 is provided with a vent hole 24 and a sounding valve body 25.

The sounding section operating section 30 includes a piston device 31 and a first spring 32.

Referring to FIG. 3, a piston arrangement 31 is shown.

A reciprocating piston 34 is fitted into the second casing 33.

Cylinder fluid pressure is introduced to the end of the piston 34.

The sounding valve plate 23 is fixed to the tip of the piston rod 35.

A first spring 32 is provided via the sounding valve plate 23 to press the piston 34 against the fluid pressure (see FIG. 2).

Braking means 3 for pressing the piston 34 in its radial direction
6 is provided.

A spherical engagement piece 37 that contacts the side surface of the piston 34 is accommodated in a receiving piece 38 that is slidably fitted in the radial direction of the piston 34 within the casing 33 .

A piston 34 is attached to this receiving piece 38 by a second spring 39.
A spring force is applied to the side.

The side wall of the piston 34 is provided with three first, second and third engagement grooves 4L42 and 43 in order in the axial direction, with which the engagement piece 37 engages.

The braking means 3 is provided in the first and second engaging grooves 41 and 42.
An inclination ffi 44, 45 is provided such that the force exerted by the piston 6 in the radial direction of the piston 34 generates a component force in the direction of pressing the first spring 32 in the axial direction of the piston 34.

The third engagement groove is provided with a slope 47 such that the braking means 36 generates a force component in the direction of pulling the first spring device 32 in the axial direction of the piston 34.

A gentle sliding slope collapse 4 for facilitating the movement of the piston 34 is provided at a position facing the slope surface 45 of the second engagement groove.
6 is provided.

Referring again to FIG. 2, the alarm release section 50 is configured as follows.

A valve chamber 52 and a valve actuation guide hole 53 are provided in order from one end to the other end inside the cylindrical third casing 51.

A gas port 54 communicating from the cylinder 8 to the valve chamber 52 is provided at one end, and a gas port 54 communicating with the valve chamber 52 is provided at the side wall of the casing 51.
A gas outlet 55 communicating with the sound generating section operating section 30 from the sound generating section 2 is bored.

The Rondo guide hole 53 also serves as an exhaust port to the outside air.

The valve body 56 has a stop valve 56a at one end of the cylindrical member, and a relief valve 56 at the other end of the cylindrical member via seven flange-shaped shoulders.
A contact protrusion 57 is provided protruding from the tip of the relief valve 56b.

The valve body 56 is interposed within the valve chamber 52 with their axes aligned.

Inside the valve chamber 52, a valve seat 58 for the stop valve 56a is provided at one end, and a valve seat 59 for the relief valve 56b is provided at the other end.

A spring force is applied to the valve body 56 toward the axial relief valve 56b by a third compression coil spring 60 inserted between the shoulder portion and the valve seat seat 58 for the stop valve 56a. Close the valve port of the valve seat 59 for the valve 56.

The contact protrusion 57 protrudes from the valve opening of the seat 59 for the relief valve 56b.

An operating rod 61 that presses the contact protrusion 57 is slidably inserted into the rod guide hole 53 of the casing 51.

A stopper 62 provided at one end of the actuating rod 61 is interposed within the casing 51.

The other end of the actuating rod 61 protrudes to the outside of the casing 51.

The actuation rod 61 is prevented from falling off from the casing by a stopper 62.

Above, the operating state will be explained.

The gas supplied from the cylinder 8 to the alarm canceling unit 50 via the conduit 12 via the stop valve 9 is supplied to the alarm release unit 50 through the stop valve 56a, which is opened.
The gas enters the sounding section operating section 30 through the gas outlet 56.

The piston 34 is pushed out by this gas pressure, and its first engagement groove 41 engages with the braking means 36, and the valve plate 23 assumes the first non-operating position 23a as shown by the dashed line.

At this time, the brake step 36 and the inclined surface 44 of the first engagement groove 41
are in contact with each other, and the forces acting in the axial direction of the piston 34 are balanced.

Therefore, the breathing gas from the intake valve 2 is transmitted to the alarm sounding section 20.
It passes through the reduced diameter portion 22 and reaches the intake pipe 3, allowing the user to breathe normally.

Now, if the cylinder pressure falls at a predefined constant constant (first specified pressure but exceeds atmospheric pressure), the splash device 3
The pressure difference between the pressing force of 6 and the gas pressing force increases, and the spring device 3
The piston 34 is pushed down by the pressing force of 2, and the engagement piece 37
momentarily climbs over the inclined surface 44 and engages with the second engagement groove 42, and the brake step 36 comes into contact with the inclined surface 45 in the same way as described above, and the piston 34 is held in a balanced state.

At this time, the valve plate 23 moves to the operating position that closes the diameter reducing portion 22 (shown by solid lines in FIG. 2).

Therefore, an alarm is emitted by the intake gas passing through the sounding part 20, and at the same time, breathing becomes difficult due to an increase in intake resistance, and the user senses an abnormality in the cylinder pressure.

Now, in order to eliminate the difficulty in breathing, the user activates the alarm release unit 50.

When the actuating rod 61 is pushed from the outside, the relief valve 56b is opened.

At the same time, the stop valve 56a is opened to the valve seat 58 for the stop valve 56a.
The valve port is closed, thereby cutting off the supply of gas from the conduit 12, and the gas acting on the piston 34 is instantaneously released to the atmosphere via the relief valve 56b.

As a result, the gas pressure acting on the piston 34 is reduced to atmospheric pressure (second specified pressure) in the housing, the piston 34 is moved by the pressing force of the spring device 32, and the engagement piece 37 of the braking means 36 is moved.
momentarily climbs over the inclined surface 45 and is retained in the third engagement groove 43.

At this time, the valve plate 23 opens the reduced diameter portion 22 to the side opposite to the first non-operating position, and the valve plate 23 opens the reduced diameter portion 22 to the second non-operating position 23.
b (indicated by a two-dot chain line) is maintained.

As a result, the gas flow path is widened, the alarm is no longer emitted, and the feeling of suffocation is eliminated.

Thereafter, when the cylinder is replaced with a new one that is sufficiently filled and used, the piston 34 is pushed out again and automatically returns to its original position.

In the above embodiment, the actuating rod 61 is pressed directly with a finger, but it may be pressed through various handles, and main examples thereof will be described below.

The fourth illustration shows a rectangular link l/ndle 71 that can be pulled down by hand.

The actuating rod 61 is biased away from the valve body 56 by a spring 72 interposed between its shoulder and the wall.

One side of the rectangular ring-shaped nodule 71 that contacts the other end of the actuating rod 61 passes through a through hole 73 provided in the side wall of the guide hole.

This prevents the actuating rod 61 from falling off the casing.

In place of the ring-shaped knob 71 shown in the fourth figure, the fifth illustration shows a pivot lever 74 that penetrates through the side wall through hole 73.
It has been established.

In the sixth figure, a screw thread 75 is screwed into the end of the operating rod guide hole, and an exhaust hole 76 is bored in the side wall of the guide hole.

In the seventh figure, a lever knob 74 is remotely operated via a flexible wire 77, a winding drum 78, and a guide roller 79.

As described above, according to the present invention, when the remaining gas level in the respiratory cylinder decreases by a certain amount, the alarm sounding section is activated and the breathing gas in the breathing circuit is used to generate the alarm sound, so that gas is wasted. First, the alarm can be reliably sensed by the user by the alarm sound and the increase in intake resistance.

In addition, the alarm canceling section eliminates the difficulty of inhaling due to increased inhalation resistance, allowing the user to act safely, etc.
Many remarkable effects can be achieved.

When the protrusion 57 is pressed, the stop valve 56a is displaced to the stop valve seat 58, thereby preventing intake gas from being released into the atmosphere and being wasted.

[Brief explanation of the drawing]

FIG. 1 is a system diagram applied to a closed circulation respirator according to an embodiment of the present invention, FIG. 2 is a sectional view of the alarm sounding section 20, alarm canceling section 50, etc., and FIG. 3 is a sectional view of the piston device 31. figure,
4 to 7 are cross-sectional views showing other embodiments of the operation method of the alarm release unit 50, respectively. 1...breathing bag, 3...intake pipe, 4...
...Mask, 5...Exhalation tube, 7...
・Clean can, 8...Cylinder, 10...
Pressure reducer, 11...supply pipe, 12...operating pipe, 20...alarm sounding section, 30...
Sound generation unit operating unit 50...T-signal instantaneous sound 8.

Claims (1)

[Claims] 1. Inhalation gas from the cylinder 8 is reduced in pressure by a pressure reducer 10 and supplied to the mask 4 from the breathing bag 1 and the intake valve 2, and expiration gas from the mask 4 is transferred from the exhalation valve 6 to the clean can 7. In the respiratory alarm device, the first spring is inserted through the reduced diameter portion 22 of the first casing 21 connected between the intake valve 2 and the mask 4 so that the first spring can be opened and closed. 32
A sounding valve body 25 is provided in a vent hole 24 formed in the valve plate 23, and one end of a piston 34 housed in a second casing 33 is attached to the valve plate 23. First, second, and third engaging grooves 4L 42 are fixed and provided in this piston 34 in sequence in the axial direction.
43 is biased with a spherical engagement piece 37 that is biased by a second spring 39, and the second spring 39 is biased in the first and second engagement grooves 41, 42 via the spherical engagement piece 39. Inclined surfaces 44 and 45 are provided, each of which generates a force component in the direction of pressing the first spring 32 due to the spring force, and the other end of the piston 34 is communicated with the valve chamber 52 of the third casing 51 of the alarm canceling section 50. The valve body 56 housed in the valve chamber 52 has a stop valve 56a and a relief valve 56b in the axial direction, and the stop valve seat 58 of the stop valve 56a is located between the cylinder 8 and the pressure reducing valve 10. A relief valve valve seat seat 59 for the relief valve 56b is communicated with the atmosphere, and the valve body 56 in the valve chamber 52 is connected to the relief valve 5 by a third spring 60.
6b is biased in the direction of seating on the relief valve valve seat 59, and the protrusion 57 protruding from the valve body 56 can be pressed from the outside against the spring force of the third spring 60, thereby reducing the cylinder pressure. is the first
When the pressure is higher than the specified pressure, the piston 34 is displaced against the spring force of the first spring 32, and the spherical engagement piece 37 engages the first engagement groove 4.
The valve plate 23 is in contact with the inclined surface 44 of the first spring 3.
2 to open the reduced diameter part 22, and when the cylinder pressure is less than the first specified pressure and more than atmospheric pressure, the spherical engaging piece 37 engages the inclined surface 4 of the second retaining groove 42.
At this time, the valve plate 23 closes the reduced diameter portion 22, and when the relief valve 56b of the valve body 56 separates from the relief valve seat 59 and the valve chamber 52 becomes atmospheric pressure, the spherical engagement piece 3
7 is engaged with the third engagement force 43 and the valve plate 23 is engaged with the first spring 32
A respiratory alarm device characterized in that the reduced diameter portion 22 is opened by being displaced in the direction of extension.