JP2003130297A - Valve device for gas cylinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent the filling of a different sort of gas, while obtaining a compact construction, facilitate the checking of a flow rate of emitted gas and enable simple regulation and operation. SOLUTION: A filling nozzle 7 is protrusively provided on the side surface of a housing 3. A gas filing port 13 is opened in the circumferential side surface of the nozzle 7, and an engagement portion 14 is provided at a predetermined position with respect to the filling port 13. The filling port 13 communicates with the interior space of a gas cylinder via a filling channel 30. A check valve 31 is disposed in the filling channel 30, which shuts off a flow from the interior space to the filling port 13. A flow regulator 21 is disposed in an outlet channel 18 that is formed in the housing 3, and an adjusting means 5 of the flow regulator 21 is arranged on the upper surface of the housing 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve device used in a gas cylinder for storing medical gas such as oxygen gas, and more particularly, it can be compactly constructed while surely preventing filling of different gases. Further, the present invention relates to a valve device for a gas cylinder, in which the flow rate of the taken-out gas can be easily checked and the adjustment operation can be easily performed.

[0002]

BACKGROUND OF THE INVENTION Gas cylinders for storing medical gases such as oxygen gas may lead to a serious accident related to the life of a patient when filled with different kinds of gases. The gas filling port needs to be structured so that only a prescribed gas filling device can be connected.

[0003]

2. Description of the Related Art A conventional gas cylinder valve device has a structure in which a screw connection portion is formed in a gas filling port and a filling metal fitting of the filling device is screwed into the gas filling port (hereinafter referred to as "
Prior art 1). In this case, in order to prevent the above-mentioned filling of different gases, the type and diameter of the screw connection portion, the screw pitch, etc. are varied depending on the type of gas.

As another type of gas cylinder valve device, a gas filling port is opened on a side surface of a housing, and the housing is inserted into a yoke provided with a joint of the filling device on one side of a quadrilateral frame. There is a structure in which the yoke is fixed to the housing by a tightening means provided on the other side of the quadrilateral frame (hereinafter referred to as prior art 2). In this case, in order to prevent the above-mentioned filling of different kinds of gases, an engaging hole is provided at a predetermined position with respect to the above-mentioned filling port, while the above-mentioned yoke is provided at a predetermined position with respect to the joint. A stop pin is provided, and the locking pin is engaged with the engagement hole so that the joint can be connected to the gas filling port, and the predetermined position is different depending on the type of gas.

[0005]

In the above-mentioned prior art 1, since the screw structure of the gas filling port differs depending on the type of gas, there is a problem that the type of valve device increases and inventory management becomes complicated. In addition, for oxygen gas, for example, it is necessary to form a female screw structure in the gas filling port, which causes a problem of increasing the size of the valve device.

In the above-mentioned prior art 2, the housing must be formed in a small size above the gas filling port of the housing so that the body portion of the housing can be inserted into the quadrilateral frame of the yoke. If it is installed above, the opening / closing handle will be small and the operability and opening / closing performance will be poor, making it difficult to use. Further, since the yoke is mounted on the body of the housing, a mounting space is required around the body, and the opening / closing handle, the gas outlet, and the like must be arranged at other parts of the housing. For this reason, there is a problem that the total height of the valve device becomes high or becomes large.
There has been a problem that it is not easy to make the valve device highly functional by attaching a flow rate adjusting device, a pressure reducing valve, a residual pressure holding valve, a fuel gauge, and the like.

Further, in the above-mentioned prior arts 1 and 2, the opening / closing handle is usually attached to the upper surface of the housing, and the adjusting means for operating the taken-out gas flow rate adjusting device is arranged on the side of the housing. For this reason, depending on the direction in which the set flow rate is confirmed, the adjusting means may be hidden behind the housing and difficult to see, and the adjusting operation may interfere with other objects to make the adjustment difficult.

The present invention solves the above problems and provides a gas cylinder valve device which can be compactly constructed while surely preventing filling of different kinds of gas, and in which the flow rate of the taken-out gas can be easily checked and adjusted. Providing is a technical issue.

[0009]

In order to solve the above problems, the present invention will be described with reference to, for example, FIGS. 1 to 6 showing an embodiment of the present invention, and a valve device for a gas cylinder is constructed as follows. It is a thing. That is, in the invention described in claim 1, the housing (3) is provided with the gas inlet (11), the inlet passage (16), the on-off valve (17), the outlet passage (18) and the gas outlet (10) in this order. , The above gas inlet (11) to the internal space (1) of the gas cylinder (2)
2), a filling nozzle (7) is projectingly provided on one side surface of the housing (3), and a gas filling port (13) is opened on the peripheral side surface of the filling nozzle (7). An engaging portion (14) is provided at a predetermined position with respect to the filling port (13), and the gas filling port (13) is communicated with the internal space (12) through a filling passage (30). A check valve (31) for shutting off the flow from the internal space (12) to the gas filling port (13) is arranged in the filling passage (30).

According to a second aspect of the present invention, in the invention according to the first aspect, a flow rate adjusting device is provided in the outlet passage (18).
(21) is arranged, and the adjusting means (5) of the flow rate adjusting device (21) is arranged on the upper surface of the housing (3).

A third aspect of the present invention is the invention of the second aspect, wherein the filling passage (30) is provided at an outlet between the on-off valve (17) and the flow control device (21). Upstream part (18a)
It is communicated with the internal space (12) through.

The invention according to claim 4 is a housing (3)
Gas inlet (11), inlet passage (16), open / close valve (17) and outlet passage (18)
And a gas outlet (10) are provided in this order, and the gas inlet (11) is formed on the lower surface of the housing (3) to open in the internal space (12) of the gas cylinder (2), and the outlet passage (18) is provided. Flow Control Device (21)
And the adjusting means (5) of the flow rate adjusting device (21) is arranged on the upper surface of the housing (3), and the on-off valve (17) is arranged.
The opening / closing means (6) and the gas outlet (10) are arranged below the adjusting means (5).

[0013]

According to the first aspect of the invention, when the gas is filled, the yoke having the joint of the filling device provided on one side of the frame is used, and the filling nozzle is inserted into the frame of the yoke. Then, the locking portion provided at a predetermined position with respect to the joint is engaged with the above-mentioned engaging portion, and the joint is connected to the gas filling port by tightening with the tightening means provided on the other side of the frame. Connected. After that, the filling gas is filled into the gas cylinder from the joint through the filling passage.

Since the above-mentioned yoke is mounted on the filling nozzle, the space for mounting the yoke is required only on one side of the outer surface of the housing on which the filling nozzle is provided. Does not require space for mounting the yoke. Therefore, the opening / closing means of the on-off valve, the gas outlet and the like are arranged on these other side surfaces and the like.

In the inventions of claims 2 and 4, the flow rate of the taken-out gas is confirmed by looking at the adjusting means from above the valve device, and the taken-out gas is adjusted to a predetermined flow rate by operating this adjusting means. To be done.

According to the third aspect of the present invention, the flow rate of the flow rate adjusting device is set to zero and the on-off valve is opened, so that the filling gas flows from the joint connected to the gas filling port to the filling passage and the outlet passage upstream portion. , The on-off valve chamber, the inlet passage, and the gas inlet in that order to fill the gas cylinder. When performing maintenance on the check valve provided in the filling passage, the check valve is removed from the housing by closing the opening / closing valve even when gas is stored in the gas cylinder. And parts are replaced.

[0017]

1 to 4 show an embodiment of the present invention, FIG. 1 is a front view of a gas cylinder valve device, FIG. 2 is a left side view, FIG. 3 is a plan view, and FIG. 4 is a vertical sectional front view. It is a figure.

As shown in FIG. 1, the valve device (1) is attached to the upper part of the gas cylinder (2) and is attached to the housing (3).
Place the fuel gauge (4) in the center of the front of the
The adjusting means (5) of the flow rate adjusting device is arranged on the upper surface, the opening / closing handle (6) of the opening / closing valve is arranged on the right side, and the filling nozzle (7) is projected on the left side. A spring accommodating cylinder (8) is hung on the lower surface of the housing (3).
A spring member housed in (8) is connected to the indicating means of the remaining amount indicator (4), and the balance between the elastic pressure of the spring member and the gas pressure in the gas cylinder (2) causes Is configured to display the remaining gas amount. In this embodiment, the valve device (1) is attached to the upper part of the gas cylinder (2), and the side surface on which the above-mentioned remaining amount indicator (4) is arranged is the front surface of the housing (3). Needless to say, the attitude of the valve device and the attitude of the gas cylinder attached thereto are not limited to those of this embodiment.

As shown in FIG. 2, the above housing (3)
A take-out nozzle (9) is provided on the rear surface of the device, and a gas outlet (10) is opened at the tip of the take-out nozzle (9). A gas inlet (11) is opened on the lower surface of the housing (3) so as to face the internal space (12) of the gas cylinder (2).

As shown in FIG. 1, the filling nozzle (7) described above is used.
The gas filling port (13) and two engaging holes are provided on the front side of the peripheral surface of the
(14 ・ 14) are provided, and the formation position of the engagement hole (14) is set to a predetermined position corresponding to the type of gas to be filled with respect to the gas filling port (13). There is. Further, as shown in FIG. 2, a receiving hole (15) is formed on the back side of the peripheral side surface of the filling nozzle (7) for receiving the tightening means of the filling yoke described later.

As shown in FIG. 4, the above housing (3)
Inside, an inlet passage (16), an on-off valve (17) and an outlet passage (18) are provided in order, and the gas inlet (11) is connected to the gas outlet (10). The open / close handle (6) has the above-mentioned open / close valve (1
It is linked to the opening / closing member (19) of 7). Above Exit Road (18)
In the middle of the, the adjusting means on the top of the housing (3)
A pressure reducing valve (20) and a flow rate adjusting device (21) are arranged inside (5).

The pressure reducing valve (20) is provided with a piston-shaped pressure reducing member (22), and is connected to the outlet passage (18) from the opening / closing valve (17).
It is configured to reduce the pressure of the taken-out gas flowing out to the predetermined pressure. The flow rate adjusting device (21) is provided with a disk-shaped orifice plate (23).
In 3), there are provided a plurality of orifice holes corresponding to respective predetermined flow rates including zero flow (that is, the cutoff state). The orifice plate (23) is linked to the adjusting means (5), and the orifice plate is rotated by rotating the adjusting means (5).
(23) rotates and any one orifice hole becomes an outlet passage (18)
It is configured to move to a position facing.

The adjusting means (5) is provided with a partial spherical shell-like cover (24) on the upper surface thereof, and as shown in FIG. 3, a display window (25) is provided at one position of this cover (24). ) Is open. Below the cover (24), a flow rate indicator (26) is fixed to the housing (3), and among the numbers displayed on the flow rate indicator (26), the outlet passage (18) and The flow rate numbers corresponding to the facing orifice holes are made visible through the display window (25). The cover (24) is made of a semi-transparent material, and the numbers shown in the lower flow rate display section (26) can be seen even in the portion other than the display window (25). Therefore, when increasing or decreasing the flow rate, adjustment means
It is possible to easily determine in which direction (5) should be rotated.

As shown in FIG. 4, a residual pressure holding valve (27) is arranged in the upstream portion (18a) of the outlet passage between the opening / closing valve (17) and the flow rate adjusting device (21). The residual pressure member (29) is closed by the elastic pressure of the residual pressure spring (28) when the gas pressure passing through the on-off valve (17) from the inlet passage (16) falls below a predetermined residual pressure. There is. In addition, in the housing (3), a filling passage (3) that connects the above-mentioned outlet passage upstream portion (18a) and the above-mentioned gas filling opening (13).
0) is formed, and the check valve (31) is arranged in the filling passage (30) so that the gas filling port (1) is discharged from the internal space (12) of the gas cylinder (2).
It is configured to cut off the flow to 3).

That is, a plug mounting hole (32) is formed in the filling nozzle (7), and the plug (33) is inserted in the mounting hole (32).
Is screwed in a hermetically sealed manner. On the peripheral surface of this plug (33),
An annular groove (34) is formed at a position corresponding to the gas filling port (13), and a communication hole (35) is formed from the annular groove (34) to the tip of the plug (33). . A check valve seat (36) is formed around the communication hole (35) at the tip of the plug (33), and a check valve seat (36) is formed between the plug (33) and the back wall of the mounting hole (32). A check valve chamber (37) is formed, and a check member (3
8) is inserted and the check member (38) is elastically pressed by the check spring (39) toward the check valve seat (36). The check valve chamber (37) communicates with the outlet passage upstream portion (18a) via the filling passage (30).

Next, the case where the stored gas is taken out from the gas cylinder provided with the above valve device will be described. When the opening / closing valve (17) is opened by operating the opening / closing handle (6), the stored gas in the gas cylinder (2) flows out from the gas inlet (11) to the outlet passage (18) via the inlet passage (16). The upstream part (18
Although a) communicates with the filling passageway (30), the check valve (31) is arranged in the filling passageway (30). It never leaks out.

When the taken-out gas is higher than a predetermined pressure, the residual pressure holding valve (27) is opened by this gas pressure, and the taken-out gas passes through the pressure reducing valve (20) to be depressurized to a predetermined pressure. It This depressurized withdrawal gas is the same as the above orifice plate.
After being adjusted to a predetermined flow rate through an orifice hole formed in (23) and corresponding to the flow rate set by the adjusting means (5), it is taken out from the gas outlet (10) via the outlet passage (18). .

When the amount of stored gas in the gas cylinder (2) becomes small and the taken-out gas pressure falls below a predetermined residual pressure, the residual pressure member (29) is closed by the elastic pressure of the residual pressure spring (28). To do. For this reason, since a predetermined residual pressure is retained in the gas cylinder (2), the gas cylinder is opened with the opening / closing valve (17) open.
Even if the extraction of the gas from (2) is completed, outside air does not enter the gas cylinder (2), and there is no fear that the internal space (12) will be contaminated with these air or the like.

Next, the case of filling the above gas cylinder with gas will be described. FIG. 5 is a left side view of the valve device in which the filling nozzle yoke is attached to the filling nozzle. As shown in FIG. 5, the yoke (40) is provided with a joint (42) on one side of the quadrilateral frame (41), and the joint (42) is connected to a gas supply source (not shown) by a pipe (43). Has been done. Locking pins (44) are attached to the frame (41) at two predetermined positions from the joint (42). Further, a fastening means (45) is attached to the other side of the frame (41) facing the joint (42).

The filling nozzle (7) is connected to the frame (4)
1) inserted into the engaging hole (14), and the locking pin (4
4) is inserted so that the joint (42) faces the gas filling port (13). In this state, the tip of the tightening means (45) is received in the receiving hole (15), and the tightening means (45) is tightened. As a result, the joint (42) is connected to the gas filling port (13). The position where the locking pin (44) is attached to the joint (42) is such that the gas filling port (1) of the filling nozzle (7) is
If the positional relationship between 3) and the engaging hole (14) is different, the locking pin
The (44) cannot be inserted into the engagement hole (14), and the joint (42) cannot be connected to the gas filling port (13).

When the joint (42) is connected to the gas filling port (13), the on-off valve (17) is opened to supply the filling gas from a gas supply source (not shown). As a result, the filling gas passes through the gas filling port (13), the filling passage (30), the outlet passage upstream portion (18a), the opening / closing valve (17), the inlet passage (16) and the gas inlet (11) in this order, and then the gas cylinder (2 ) Inside space (12). At this time, the adjusting means (5) of the flow rate adjusting device (21) sets the flow rate to zero. As a result, the filling gas flowing into the outlet passage upstream portion (18a) does not flow out from the gas outlet (10). Then, check the remaining amount indicator (4) and check the gas cylinder (2).
When a predetermined amount of gas is filled in the inside, the on-off valve (17) is closed, the tightening means (45) is loosened, and the yoke (40) is filled in the nozzle.
Remove from (7) and complete the filling operation.

In the above embodiment, the yoke provided with the quadrilateral frame was used, but in the present invention, as shown in FIG. 6, a C-shaped frame yoke may be used. This type of yoke (46) also has a joint (42) and a locking pin (44) on one side of the C-shaped frame (47), and a fastening means (on the other side facing the joint (42)). 45). The yoke (46) of the C-shaped frame also has the valve device (1) as in the above embodiment.
Since it is attached to the filling nozzle (7) protruding from one side,
There is no fear of interfering with other members such as the opening / closing means and the adjusting means (5). Since the filling operation and the like are the same as those in the above-mentioned embodiment, the description thereof will be omitted.

In the above-mentioned embodiment, since the filling passage (30) is connected to the outlet passage upstream portion (18a), even when the gas is stored in the gas cylinder (2), the on-off valve (17) can be closed. There is an advantage that the check valve (31) can be easily maintained.
However, in the present invention, the above-mentioned filling passage (30) is connected to the inlet passage (1
It may be connected to 6) or directly communicated with the internal space 12 of the gas cylinder 2. In this case, the gas can be filled with the on-off valve (17) closed. Further, in the above-described embodiment, the engaging portion is the engaging hole and the engaging portion is the engaging pin, but the engaging portion of the present invention may have any structure capable of engaging the engaging portion of the yoke. However, the present invention is not limited to the above embodiment.

[0034]

Since the present invention is constructed and operates as described above, it has the following effects.

(1) Only the yoke provided with the engaging portion at a predetermined position with respect to the joint can engage the engaging portion with the engaging portion, and the joint can be connected to the gas filling port. ,
By setting the above-mentioned predetermined position according to the type of gas, it is possible to reliably prevent the filling of different gases.

(2) The yoke mounting space may be formed only on one side of the outer surface of the housing on which the filling nozzle is provided, and the opening / closing means of the on-off valve and the gas outlet may be formed on the other side or above the other housing. Etc. can be arranged, and the entire valve device can be made compact. Also,
Since it is sufficient to provide a space for mounting the yoke on one side described above, a valve device can be made compact by attaching a flow rate adjusting device, a pressure reducing valve, a residual pressure holding valve, a fuel gauge, etc. to other parts. The function can be easily enhanced while maintaining.

(3) In the inventions of claims 2 and 4, since the adjusting means of the flow rate adjusting device is arranged on the upper surface of the housing, the adjusting means can be seen from all directions above the valve device. The flow rate of the taken-out gas can be easily confirmed. Moreover, the operation of the adjusting means can be easily performed because it does not interfere with other objects such as a pipe connected to the gas outlet.

(4) In the third aspect of the invention, since the filling passage communicates with the internal space of the gas cylinder via the upstream portion of the outlet passage between the on-off valve and the flow rate adjusting device, the gas is not filled in the gas cylinder. Even in the stored state, the check valve provided in the filling passage can be easily maintained by closing the on-off valve.

[Brief description of drawings]

FIG. 1 is a front view of a valve device for a gas cylinder showing an embodiment of the present invention.

FIG. 2 is a left side view of a valve device for a gas cylinder.

FIG. 3 is a plan view of a valve device for a gas cylinder.

FIG. 4 is a vertical sectional front view of a valve device for a gas cylinder.

FIG. 5 is a left side view of the valve device with a yoke attached to the filling nozzle.

FIG. 6 is a front view of another type of yoke mounted on the valve device.

[Explanation of symbols]

1 ... Valve device, 2 ... Gas cylinder 3 ... housing, 5 ... adjusting means, 6 ... Opening / closing means (opening / closing handle), 7 ... Filling nozzle, 10 ... gas outlet, 11 ... gas inlet, 12 ... Internal space of the gas cylinder (2), 13 ... Gas filling port, 14 ... Engaging portion (engaging hole), 16 ... entrance path, 17 ... Open / close valve, 18 ... Exit road, 18a ... upstream of the exit road, 21 ... Flow rate adjustment device, 30 ... filling path, 31… Check valve.

Claims (4)

[Claims] 1. The housing (3) has a gas inlet (11) and an inlet passage.
(16), an on-off valve (17), an outlet passage (18) and a gas outlet (10) are provided in order, and the above gas inlet (11) is opened in the internal space (12) of the gas cylinder (2), A filling nozzle (7) is provided on one side surface of the housing (3) of the housing, and a gas filling port (13) is opened on the peripheral side surface of the filling nozzle (7). An engaging portion (14) is provided at a predetermined position, the gas filling port (13) is communicated with the internal space (12) through the filling passage (30), and the filling passage (30) is formed. The check valve (3) that shuts off the flow from the internal space (12) to the gas filling port (13)
A valve device for a gas cylinder, characterized in that 1) is arranged. 2. A flow adjusting device (21) is arranged in the outlet passage (18), and the adjusting means (5) of the flow adjusting device (21) is arranged on the upper surface of the housing (3). The valve device for a gas cylinder according to Item 1. 3. The on-off valve (17) for connecting the filling passage (30)
The valve device for a gas cylinder according to claim 2, wherein the valve device for gas cylinder communicates with the internal space (12) through an upstream portion (18a) of an outlet passage between the flow rate adjusting device (21) and the flow rate adjusting device (21). 4. A gas inlet (11) and an inlet passage in the housing (3).
(16), an on-off valve (17), an outlet passage (18) and a gas outlet (10) are provided in this order, and the gas inlet (11) is formed on the lower surface of the housing (3) so that the inside of the gas cylinder (2) is formed. The flow rate adjusting device (21) is arranged in the space (12), and the outlet passage (18) is arranged.
It is arranged on the upper surface of (3), and the opening / closing means (6) of the opening / closing valve (17) and the gas outlet (10) described above.
A valve device for a gas cylinder, characterized in that and are arranged below the adjusting means (5).