JPH09131402A - Medical valve apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical valve apparatus capable of being simply, safely and correctly operated even by an unskilled patient by setting the main body of a check valve in a filling port provided sticking in a valve main body of a port exclusively used for filling and arranging a valve body in the main body of the check valve to open or close a supply path moving by a pressure difference between the inside and the outside thereof. SOLUTION: This valve apparatus comprises a valve main body 1, a flow regulating unit and a port 3 exclusively used for filling and is mounted on a gas cylinder by screwing a male pipe of the main body 1 down into the gas cylinder. The flow regulating unit comprises a pressure reducing valve 21 which is arranged in a gas delivery chamber 20 formed on the main body 1 communicating with a gas outflow path 19 and a unit body 22 positioned outside the valve. The port 3 excrusively used for filling has a check valve unit screwed down into a filling port, a protruded part of the main body 1 and the main body of the check valve has a valve body therein moving by a pressure difference between the inside and the outside thereof. The valve body is pushed by a spring constantly to close a supply path of the main body of the check valve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical valve device which is attached to a portable oxygen cylinder system used in home oxygen therapy or assisted breathing and which decompresses compressed and filled oxygen to deliver a predetermined amount. It is a thing.

[0002]

2. Description of the Related Art Home oxygen therapy, which has been steadily increasing year by year, is applied to patients with chronic respiratory failure who are receiving medical treatment, whose condition is stable, and who can be discharged from the hospital by maintaining only oxygen inhalation. By continuing to administer oxygen at home, it is a method that makes it possible to return to society and the family life just like ordinary people. It is said that more than 30,000 people are currently undergoing home oxygen therapy, including chronic obstructive pulmonary disease (COPD) such as emphysema and chronic bronchitis, pulmonary tuberculosis sequelae, interstitial lung disease, and lung cancer. ing.

In the above home oxygen therapy, a small, portable oxygen gas (hereinafter simply referred to as “gas”) cylinder is used.
A valve device for decompressing the high-pressure gas and delivering a predetermined amount is attached. Since the container valve in this conventional valve device does not have a flow rate adjusting function, a separate flow rate adjusting device is attached and used, but the desorption, especially the desorption work at the time of gas filling, is troublesome and the user It was a heavy burden.

[0004]

As described above, the conventional medical valve device is cumbersome to operate, and a large load is placed on the patient to use it correctly. Therefore, an object of the present invention is to provide a medical valve device that is easy to operate and that can be used correctly and safely by a patient who is not used to it.

[0005]

SUMMARY OF THE INVENTION The present invention comprises a valve body which is detachably attached to a gas cylinder, and which is provided with a flow rate adjusting unit and a port dedicated to filling, wherein the flow rate adjusting unit is a gas delivery unit formed in the valve body. A housing having a cylinder portion and having a gas passage for introducing gas is provided in the chamber, and a piston having a gas passage communicating with the gas passage is slidably fitted in the cylinder portion of the housing. And a unit main body which is equipped with a flow rate adjusting mechanism and a nozzle joint and is fixed to the valve main body in a state where the end portion is fitted into the cylinder portion, and the filling exclusive port is Installing a check valve body having a supply path in the filling port protruding from the valve body,
The above-mentioned problems have been solved by a medical valve device characterized in that a valve body is arranged in the check valve body to open and close the supply passage by moving due to a pressure difference between the inside and the outside.

A main valve may be separately installed in the valve body, or a pressure reducing valve may be arranged in place of the main valve to achieve two-stage pressure reduction. Preferably, a gas fuel gauge and / or a pressure gauge are provided on the upper surface of the valve body. As the flow rate adjusting mechanism, a spindle of a handle provided with a flow rate adjusting plate having a plurality of differently sized measuring holes at its tip is rotatably inserted into the unit body, and the unit body is
It is possible to employ a gas passage that is provided with a gas passage that communicates with any of the metering holes as the flow rate adjusting plate rotates, or a known needle valve system. Alternatively, a fixed orifice may be used.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The valve device according to the present invention includes a valve body 1, a flow rate adjusting unit 2, and a filling dedicated port.
And a gas gauge 4 or a pressure gauge, which is attached to the gas cylinder by screwing the male screw pipe 5 of the valve body 1 into the gas cylinder.

The valve body 1 in the embodiment shown in FIGS. 1 to 6 further has a main valve structure, and the valve body 1 can be made of a lightweight aluminum alloy for the reason described below. First, the structure of the main plug will be described. A handle 8 is attached to the valve box 7 of the valve body 1 via a gland nut 9. That is, the ground nut 9 has a male threaded portion on the outer peripheral surface and a female threaded portion on the inner peripheral surface, and has a spindle insertion hole 10 at the center, and the male threaded portion has the male threaded portion. The gland nut 9 is fixed to the valve box 7 by being screwed into the female screw opening at the end.

One end of the spindle insertion hole 10 extends outwardly and is fixed to the handle 8, and the other end thereof is a ground nut 9.
The spindle 11 that faces the female screw portion is slidably inserted. A portion of the spindle 11 facing the inside of the female screw portion is enlarged in diameter, and a male screw screwed into the female screw portion is engraved on the outer peripheral surface thereof. Therefore, when the handle 8 is rotated,
It will be easily understood that the spindle 11 rotates integrally with the handle 8 (the gland nut 9 does not rotate at that time) and moves in the left-right direction in FIG.

The opening / closing operation of the gas passage by the rotation of the handle 8 can be set so that it can be performed at a small rotation angle of less than half the rotation of the handle 8. The handle 8 has a skirt 12 for covering the outer periphery of the gland nut 9.
When the characters "open" and "closed" are displayed there, it is easy for the user to know at a glance whether the container is open or closed. As described above, since the rotation angle of the handle 8 is 180 degrees or less, the letters "open" and "closed" can be expressed in the upper half portion of the skirt 12, which is easy to see.

A push rod guide 14 that supports the push rod 13 at the center and slidably in the left and right direction in FIG. 2 is fitted in the valve box 7. Further, in the gas flow rate control chamber 15 located at the back of the fitting portion of the push rod guide 14 in the valve box 7, the valve body 1 having a seat on the front surface.
6 are deployed. The valve body 16 is equipped with a spring 17 that acts to constantly press the valve body 16 toward the gas inflow path 18 and the gas outflow path 19 side.

FIG. 2 shows a gas inflow path 18 and a gas outflow path 1.
9 shows a state in which both are closed. When the handle 8 is turned from that state, the handle 8 and the spindle 11 are moved to the position shown in FIG.
Move to the right at. Then, internal pressure is applied to the sheet of the valve body 16 through the gas inflow passage 18, and as a result, the valve body 16 moved by the spindle 11 moves against the spring 17 to open the gas outflow passage 19 and open the gas cylinder. The supplied oxygen gas flows through the gas inflow passage 18 and the gas flow rate control chamber 15 to the gas outflow passage 19.

Since there is no screw structure inside the gas flow control chamber 15, no abrasion powder is generated and it is not only hygienic, but also the abrasion powder is exothermically ignited by adiabatic compression heat accompanying high-pressure gas flow. There is no. In addition, the valve body 16 moves due to the internal pressure when the valve is opened, but the valve body 16 always keeps the spring 17
Since the valve is pushed by, the pressure in the gas flow rate control chamber 15 does not rise suddenly and the temperature does not rise suddenly when the valve is opened. Therefore, the valve body 1 can be made of a lightweight aluminum alloy.

The flow rate adjusting unit 2 comprises a pressure reducing valve 21 provided in a gas delivery chamber 20 formed in the valve body 1 in communication with the gas outflow passage 19 and a unit body 22 located outside thereof. FIG. 4 shows the structure of the pressure reducing valve 21 in detail. The housing 23 thereof has a cylinder portion 24, and the piston 25 is slidably fitted therein. The piston 25 has a shaft portion 27 having a gas passage 26 formed therein, and the tip of the shaft portion 27 can reach the gas inflow chamber 29 of the protrusion 28 of the housing 23.

A spring 30 is mounted on the shaft portion 27. One end of the spring 30 is fixed to the piston 25, and the other end is fixed to a spring seat 31 installed in the housing 23. A concave portion 32 is formed at the center of the end surface of the protruding portion 28, and the gas inflow chamber 2 extends from the concave portion 32.
A gas passage 33 passing through 9 is drilled. A filter 34 is arranged in the recess 32. The gas passage 33 has a shaft portion 2.
The sheet 35 disposed at the tip of the sheet 7 is closed by close contact. The spring 30 pushes the piston 25 back and always acts to open the gas passage 33. The gas passage 33 and the gas inflow chamber 29 are in communication with each other, and the compressed oxygen, which has been primarily depressurized by passing through the pressure reducing valve 21, is supplied to the gas passage 26.

The oxygen gas pressure (original pressure) in the gas cylinder is usually 150 to 200 kgf / cm ² , but the pressure reducing valve 21 normally reduces the pressure to 1.4 kgf / cm ² .
However, when the original pressure decreases due to oxygen consumption, the depressurized gas pressure also decreases to 1.1 to 1.2 kgf / cm ² , and stable gas supply to the patient cannot be achieved. In order to avoid such a situation, the gas delivery chamber 20 is made slightly longer and the pressure reducing valve 21 is arranged in two stages, or the pressure reducing valve is arranged in place of the main valve as in the embodiment described later and the pressure reducing valve is provided in two stages. It is effective to make steps. In that case, first, the primary decompression valve is used to perform a primary decompression to 5 to 7 kgf / cm ² ,
Then, by the second-stage pressure reducing valve, a predetermined 1.4 kgf / cm
Secondary depressurization to ² is possible. In this case, a change in the source pressure affects the primary reduced pressure portion, but does not affect the secondary reduced pressure portion, and stable supply is possible.

FIG. 5 shows a detailed configuration example of the unit main body 22 for adjusting the flow rate. The tip of the unit main body 22 faces the housing 23 and abuts the piston 25. The unit main body 22 has a flange 37, and a cap nut 38 is put on the flange 37. The cap nut 38 is screwed onto a male screw portion formed on the outer circumference of the opening of the valve main body 1 to form a collar 3
7 is sandwiched between the inner surface of the cap nut 38 and the end edge of the opening of the valve body 1, whereby the unit body 22 is fixed to the valve body 1.

Reference numeral 41 denotes a handle having a spindle 42, which is rotatably inserted in the unit body 22. A flow rate adjusting plate 43 is installed at the tip of the spindle 42. The flow rate adjusting plate 43 is provided with metering holes (orifices) 44 of different sizes at equal angle positions (45 ° position in the figure), but it is preferable not to open one position. Each metering hole 44 has a flow rate adjusting plate 4
As the 3 is rotated, it is communicated with the gas passages 45 formed in the unit main body 22. A nozzle joint 46 is screwed to the unit body 22 so as to communicate with the gas passage 45.

The handle 41 has a skirt 47 that covers the end of the unit main body 22, and a groove 48 is provided inside the skirt 47. The groove 48 is for positioning the measuring hole 44, and a positioning ball 49 that engages with the groove 48 is installed in the unit main body 22. A scale indicating the flow rate is displayed on the outer peripheral surface of the skirt 47 (see FIG. 1), and when the scale is aligned with the indicator line, the positioning ball 49 engages with the groove 48 and the rotational position thereof is maintain. The metering hole 44 corresponding to the selected flow rate at the rotational position is in communication with the gas passage 45, and flows from the gas passage 26 of the piston 25 into the space 50 secured in front of the flow rate adjusting plate 43. The flowing gas is guided to the gas passage 45.

By turning the handle 41 with a little force, the positioning ball 49 comes out of the groove 48, and then the handle 41 can be lightly turned. When the flow rate scale is set to 0, the gas does not flow because the portion of the flow rate adjusting plate 43 where the measuring hole 44 is not formed blocks the gas passage 45.
In order to easily set the handle 41 to this position, it is preferable to adopt the zero stopper mechanism described in the embodiments below.

The reference numeral 51 designates a spring mounted on the spindle 42, and the flow rate adjusting plate 43 is constantly attached to the unit main body 22,
In other words, it acts so as to be in close contact with the inlet of the gas passage 45. Further, 52 is a stopper pin, which is a unit main body 2
It projects from 2 toward the handle 41. The tip of the stopper pin 52 engages with the annular groove 53 formed in the handle 41 and hits the stopper 54 at the end of the annular groove to regulate the rotating end of the handle 41. A nasal cannula is connected to the nozzle joint 46 through an oxygen supply controller as appropriate.

The flow rate adjusting mechanism in the flow rate adjusting unit 2 is not limited to the one described above. For example, a throttle valve (mainly a needle valve) that controls the flow rate of gas by adjusting the opening of the valve to adjust the flow rate resistance. ) Or a mechanism of a speed control valve in which a check valve and a throttle valve are integrated in parallel and integrated, or a fixed orifice with a fixed flow rate can be used.

Next, the structure of the filling-only port 3 will be described with reference to FIG. The filling port 3 is formed by screwing a check valve unit into a filling port 56 in which a part of the valve body 1 is projected. Reference numeral 57 is a check valve body, which has a valve body 58 which moves inside due to a pressure difference between the inside and the outside. The valve body 58 is constantly pushed by the spring 59 to close the supply passage 60 of the check valve body 57. Reference numeral 61 is a cap, 62 is a safety valve plug, and 63 is a main passage.

When filling oxygen, the cap 61 is removed and the supply port of the gas tank is connected to the filling port 56 to supply oxygen gas. Since the pressure on the supply side is high at the start of supply, the valve element 58 is pushed inward against the spring pressure of the spring 59, and the supply passage 60 opens. Thereby, the oxygen gas flows into the gas cylinder through the main passage 63. When the filling is completed eventually, the internal pressure increases, the valve body 58 is pushed back, and the supply path 60 is closed. Since the gas filling operation is performed in this manner, no handle opening / closing operation is required.

The gas fuel gauge 4 or the pressure gauge is disposed on the most visible upper surface of the valve body 1 and is protected by being surrounded by the protective cover 64. The gas fuel gauge 4 calculates and displays the remaining usage time of the cylinder from the pressure inside the gas cylinder.
For example, pressure measuring means for measuring the pressure of the gas in the gas cylinder, flow rate set value storage means for storing the set value of the consumption flow rate of the gas supplied from the gas cylinder to the outside, and capacity for storing the set value of the capacity of the gas cylinder. The set value storage means, the set value of the gas consumption flow rate stored in the flow rate set value storage means, and the set value of the cylinder capacity stored in the capacity set value storage means are used to measure the inside of the gas cylinder measured by the pressure measuring means. It comprises a remaining usage time calculation means for calculating the remaining usage time of the gas cylinder from the residual pressure of the gas, and a remaining usage time display means for displaying the remaining usage time calculated by the remaining usage time calculation means.

In the embodiment shown in FIG. 7, the configuration of the main plug in the above-mentioned embodiment is omitted, and only the configuration of the flow rate adjusting unit 2 and the configuration of the filling dedicated port 3 are provided. The structure of the filling-only port 3 itself conforms to the above-described embodiment (the common reference numerals in both embodiments indicate the same parts). However, the flow rate adjusting unit 2 and the filling port 3 are arranged in a direction perpendicular to the valve body 1 in the above embodiment, but are arranged in a straight line in this embodiment.

In this embodiment, the flow rate adjusting plate 43 functions as a main plug. That is, the handle 41 is operated to set the flow rate to zero.
When set to, all the measurement holes 44 of the flow rate adjusting plate 43 are disengaged from the gas passage 45, the gas passage 45 is closed, and the gas flow to the nozzle joint 46 is cut off.

The embodiment shown in FIGS. 8 and 9 is the first embodiment described above.
In the first embodiment, the portion of the main valve (main valve) is
The decompression mechanism has two stages by replacing it with a decompression unit. In FIGS. 8 and 9, the portions denoted by the same reference numerals as those in FIGS. 1 to 7 indicate the same portions (common configurations), and detailed description thereof will be omitted.

In the figure, reference numeral 70 denotes a housing fitted in a gas delivery chamber 71 communicating with the gas outflow passage 19 of the valve box 7, and a concave portion 72 communicating with the gas inflow passage 18 is formed at the center of the tip end surface thereof. The filter 73 is installed in the recess 72.
Reference numeral 74 is an O-ring that is fitted to the front end surface of the housing 70 and is brought into pressure contact with the wall surface of the gas delivery chamber 71. Further, the housing 70 is formed with a gas flow path 76 connecting the gas inflow chamber 75 and the gas delivery chamber 71 inside thereof.

At the rear of the gas inflow chamber 75 (to the right in FIG. 8), there is a cylinder chamber 77 that opens to the rear end surface of the housing.
Is formed, and the piston 78 is slidably fitted in the cylinder-chamber 77. The piston 78 has a shaft portion 80 having a gas passage 79 formed therein, and the tip end portion of the shaft portion 80 has a gas inflow chamber 7
Face within 5. A spring 81 is mounted on the shaft portion 80. One end of the spring 81 is fixed to the piston 78, and the other end thereof is fixed to a seat 82 installed in the housing 70 so as to surround the shaft 80. The spring 81 constantly presses the O-ring 83 via the seat 82 to seal between the gas inflow chamber 75 and the cylinder chamber 77. Reference numeral 85 denotes a piston retainer fitted in the opening of the cylinder-chamber 77, and has a flange that comes into contact with the edge of the opening of the cylinder-chamber 77.

Reference numeral 86 denotes a pressure reducing valve mounting nut which is a cap of the first pressure reducing valve, and has a female screw portion 86a for screwing to a male screw portion engraved on the outer periphery of the valve box 7 at the front. Although the rear end surface of the pressure reducing valve mounting nut 86 may be closed (see the pressure reducing valve mounting nut 105 in FIG. 10 described later),
In the example shown in FIG. 8, it is opened, and functions as a safety mechanism for closing the gas inflow chamber 75 when an excessive pressure (for example, more than 15 kgf / cm ² ) of gas is supplied thereto. A capping piece 87 is installed.

An intermediate portion of the capping piece 87 is projected, and a male screw 88 which is screwed into a female screw formed on the inner peripheral surface of the rear end face side opening of the pressure reducing valve mounting nut 86 is engraved on the peripheral surface thereof. It Further, the head of the capping piece 87 is slidably fitted in the central hole 89 of the piston retainer 85, and the rear end face exposed at the rear end opening of the pressure reducing valve mounting nut 86 has a driver and a coin. A recessed groove 87a is formed in which the like are fitted. By fitting and turning a driver, a coin, or the like into the groove 87a, the stopper piece 87a can be advanced or retracted. Reference numeral 90 is a retaining pin for the closing piece 87.

The operation of the capping piece 87 will be described. When the gas pressure supplied from the gas inflow passage 18 becomes an abnormal pressure (for example, more than 15 kgf / cm ² ) during the primary depressurization, the gas inflow chamber 75 And the O-ring 83 that seals between the cylinder and the chamber 77 is pushed, and the receiving seat 82 is pushed back against the spring pressure of the spring 81 accordingly. As a result, the seal by the O-ring 83 is released. , Gas leaks to the outside through the inside of the cylinder chamber 77.

Then, when the closing piece 87 is rotated and moved forward, the piston 78 is pushed leftward in FIG. 8 against the spring pressure of the spring 81, and the sheet 78a at the tip thereof is gas of the recessed portion 72. It closely adheres to the outlet of the inflow chamber 75 and closes it. Thus, the inflow of gas into the gas inflow chamber 75 is blocked. The stopper piece 87 can also be used to close the gas inflow chamber 75 when the gas is not consumed (the role of the main stopper).

In the embodiment shown in FIG. 8, in order to easily and reliably position the zero stopper mechanism of the flow rate adjusting plate 43, that is, the spindle 42 at the position where the gas passage 45 is closed by the non-opening portion of the flow rate adjusting plate 43. Equipped with the mechanism of.
The mechanism is, for example, a ball 92 formed by forming a hole 91 in the unit body 22 and inserted therein, and a counterbore 9 formed on the peripheral surface of a spindle 42 into which a part of the ball 92 is fitted.
And 3.

The ball 92 is constantly pressed against the peripheral surface of the spindle 42 by the spring 94 fitted in the hole 91, and when the spindle 42 rotates and the counterbore 93 arrives, a part of the ball 92 is reached. Fits in. At that position, the non-opening portion of the flow rate adjusting plate 43 is set to face the gas passage 45. Reference numeral 95 is a stopper for holding the spring 94. This configuration can also be adopted in the above-described embodiments.

Although the installation position of the zero stopper mechanism is different between FIG. 8 and FIG. 9 (in FIG. 8, it is aligned with the nozzle joint 46, but in FIG. Right angle), which is so illustrated for convenience to facilitate understanding of the mechanism. The zero stopper mechanism can be installed at any position of the unit main body 22, and is not limited to the illustrated position.

Next, the embodiment shown in FIG. 10 will be described. The parts denoted by the same reference numerals as those in FIGS. 1 to 9 have the same (common) configuration, and therefore detailed description thereof will be omitted. The embodiment shown in FIG.
Similar to the one shown in (1), the pressure reducing valve is arranged in two stages, but the flow rate adjusting mechanism is different from that.

That is, in this case, the fixed orifice 101 in which one orifice having a predetermined diameter is formed is embedded in the inner end surface of the unit main body 100 in contact with the second pressure reducing valve. The gas sent from the gas passage 26 of the piston 25 is metered by passing through the fixed orifice 101, and a predetermined amount is sent to the nozzle joint 46 through the gas passage 102 communicating with the fixed orifice 101. 103 is the gas passage 102
It is operated by turning the handle 104 screwed from the outer end surface of the unit main body 100 with an opening / closing plug that shuts off the unit.

Reference numeral 105 denotes a pressure reducing valve mounting nut which is a cap of the first pressure reducing valve, and is screwed to the valve box 7 while the piston retainer 85 is being pressed. A hexagonal hole 106 for tightening is provided on the outer end surface of the pressure reducing valve mounting nut 105 in this case, and a piston holder 85 is provided inside the hexagonal hole 106 for tightening.
A pressure reducing valve mounting sheet 107 for protecting the engine is provided.

[0041]

Since the present invention is as described above, even a person who is unfamiliar with the handle operation can operate it without any doubt, and since there is a port exclusively for gas filling, the handle for gas filling is provided. There is an effect that it is possible to provide a suitable medical valve device that does not require operation, has a lightweight and safe structure, has a small burden on home oxygen therapy patients, which is expected to continue increasing in the future.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of one embodiment of the present invention.

FIG. 3 is a partial cross-sectional side view of one embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing a pressure reducing valve of the flow rate adjusting unit according to the embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view showing a flow rate adjusting unit according to an embodiment of the present invention.

FIG. 6 is a front view of the flow rate adjusting plate of the flow rate adjusting unit according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view of another embodiment of the present invention.

FIG. 8 is a cross-sectional view of yet another embodiment of the present invention.

9 is a vertical sectional view of a portion of the zero stopper-mechanism portion of FIG.

FIG. 10 is a cross-sectional view of yet another embodiment of the present invention.

[Explanation of symbols]

 1 Valve body 2 Flow rate adjustment unit 3 Filling port 4 Gas fuel gauge 8 Handle 20 Gas delivery chamber 21 Pressure reducing valve 22 Unit body 23 Housing 24 Cylinder part 25 Piston 26 Gas passage 33 Gas passage 34 Filter-41 Handle 42 Spindle 43 Flow rate adjustment plate 44 Metering hole 45 Gas passage 46 Nozzle joint 56 Filling port 57 Check valve body 58 Valve body 60 Supply passage 70 Housing 71 Gas delivery chamber 75 Gas inflow chamber 77 Cylinder-chamber 78 Piston 79 Gas passage 87 Closure pipe − Space 92 Ball 93 Counterbore 101 Fixed orifice

Claims (9)

[Claims] 1. A flow valve adjusting unit and a port dedicated to filling are provided in a valve body which is detachable from a gas cylinder, and the flow rate adjusting unit includes a cylinder portion in a gas delivery chamber formed in the valve body. And a pressure reducing valve formed by disposing a housing in which a gas passage for introducing gas is formed, and a piston having a gas passage communicating with the gas passage is slidably fitted in a cylinder portion of the housing, and a flow rate adjustment. A unit body fixed to the valve body in a state where the end portion is fitted into the cylinder portion, the unit body having a mechanism and a nozzle joint, and the filling-only port protruding from the valve body. A check valve body having a supply passage is provided in the filling port, and a valve body that opens and closes the supply passage by moving due to a pressure difference between the inside and the outside is arranged in the check valve body. Medical valve device that. 2. The valve device for medical use according to claim 1, further comprising a main stopper installed between the gas inflow passage from the gas cylinder of the valve body and the gas delivery chamber to shut off gas supply to the gas delivery chamber. 3. A valve body which is detachable from a gas cylinder is provided with a flow rate adjusting unit and a port dedicated to filling, and a gas delivery chamber formed in a valve box of the valve body is equipped with a cylinder part and introduces gas. A housing having a gas passage is provided, and the cylinder of the housing is
A first pressure reducing valve, which is slidably fitted into a piston having a gas passage communicating with the gas passage, is installed in the portion, and as a front stage of the flow rate adjusting unit of the valve body,
In the gas delivery chamber formed in the valve body, a cylinder-
A second decompression in which a housing provided with a gas passage for introducing gas is provided, and a piston having a gas passage communicating with the gas passage is slidably fitted in a cylinder portion of the housing. A unit main body which is provided with a valve and which is provided downstream of the flow rate adjusting unit and which is provided with a flow rate adjusting mechanism and a nozzle joint and is fixed to the valve main body in a state where the end portion is fitted in the cylinder portion of the second pressure reducing valve The filling-only port is provided with a check valve body having a supply passage in a filling port projecting from the valve body, and is moved in the check valve body by a pressure difference between the inside and the outside. A medical valve device comprising a valve body for opening and closing the supply path. 4. An opening is formed in a rear end surface of a pressure reducing valve mounting nut which is fixed to the valve box and constitutes a cap of the first pressure reducing valve, and a closing piece is inserted into the opening so as to be able to move forward and backward.
The medical valve according to claim 3, further comprising a mechanism in which a head portion of the stopper piece presses the piston when the stopper piece is advanced, so that a gas inflow path into the housing can be blocked at a tip portion of the piston. apparatus. 5. The medical valve device according to claim 1, further comprising a gas fuel gauge and / or a pressure gauge installed in the valve body. 6. The flow rate adjusting mechanism rotatably inserts a spindle of a handle having a flow rate adjusting plate having a plurality of differently sized measuring holes at its tip into the unit main body, and at the same time, in the unit main body, The medical valve device according to any one of claims 1 to 5, wherein a gas passage communicating with any one of the measuring holes is formed by the rotation of the flow rate adjusting plate. 7. The medical valve device according to claim 6, wherein the flow rate adjusting plate is provided with a portion that blocks a gas passage. 8. The medical valve device according to claim 6, further comprising means for lightly stopping the rotation of the spindle of the handle when the portion of the flow rate adjusting plate that blocks the gas passage faces the gas passage. 9. A fixed orifice in which the flow rate adjusting mechanism has one metering hole formed in the end surface of the unit body on the pressure reducing valve side for communicating with a gas passage communicating with the nozzle joint so as to keep the inflow rate constant. The medical valve device according to any one of claims 1 to 5, wherein the medical valve device is arranged.