JPH0432532Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a valve for a high-pressure gas container, which is attached to and used in a high-pressure gas container such as propane gas.

(Prior technology) Various overflow prevention methods are used to automatically shut off gas release when gas is released due to earthquakes, disasters, etc. during use by opening the high-pressure gas container valve. A valve has already been developed. Various improvements have been made so that the above-mentioned overflow prevention valve can be built into the housing of a high-pressure gas container valve. Valves for gas containers were finally put into practical use. However, in the case of the above-mentioned high-pressure gas container valve, when filling the high-pressure gas container with gas and when recovering residual gas from the high-pressure gas container, the valve is installed in the inlet flow path or the outlet flow path. The built-in overflow prevention valve gets in the way, and the gas flow rate is ~40% higher than when there is no built-in overflow prevention valve.
60%, the drawback is that it takes extra time to fill the gas and recover the remaining gas.

(Problems to be solved by the invention) The present invention has been made to eliminate the above-mentioned drawbacks, and despite having a built-in overflow prevention valve in the housing, it is difficult to fill the gas The object of the present invention is to provide a valve for a high-pressure gas container that does not interfere with gas recovery.

(Means for solving the problem) In order to achieve the above-mentioned object, the present invention provides an overflow prevention valve in a bypass flow path that is not involved in gas filling and residual gas recovery. .
That is, the high-pressure gas container valve of the present invention includes (A) an inlet channel in the housing of the high-pressure gas container valve, a bypass channel formed by branching the inlet channel, and a bypass channel that is perpendicular to the end of the inlet channel. (B) an on-off valve is arranged at a connection point between the inlet channel and the bypass channel and the outlet channel, and (C) an overflow prevention valve is provided in the bypass channel. It is characterized by:

(Function) By operating the on-off valve to shut off the inlet flow path and communicating the inlet flow path to the outlet flow path via the bypass flow path, gas is released through the open overflow prevention valve. Ru. When gas is discharged during use and an excessive flow of gas occurs due to an earthquake, disaster, etc., the excessive flow of gas is automatically shut off by the overflow prevention valve. By operating the on-off valve to shut off the bypass flow path and communicate the inlet flow path with the outlet flow path, gas filling and residual gas recovery can be performed without passing through the overflow gas prevention valve. be.

(Example) Hereinafter, embodiments of the present invention will be described in detail.

In the figure, 10 is a housing for a high-pressure gas container, and an inlet flow path 11 and an outlet flow path 12 are formed in the housing 10 so as to be perpendicular to each other.
13 is a male thread carved on the outer surface of the inlet flow path 11, and 14 is a female thread carved on the inner surface of the outlet flow path 12. Reference numeral 15 denotes an opening/closing valve mounting hole provided in the housing 10, and the opening/closing valve mounting hole 15 is provided along the axial direction of the outlet passage 12 at the connection point between the inlet passage 11 and the outlet passage 12. It is formed in a dead end shape orthogonal to the flow path 11 . Reference numeral 16 denotes a stepped spindle mounting hole provided in the housing 10, and the spindle mounting hole 16 is formed so as to communicate orthogonally with the on-off valve mounting hole 15 in plan view. Reference numeral 17 denotes a female thread for mounting a gland nut, which is carved on the inner surface of the large diameter portion of the spindle mounting hole 16.

20 is a bypass flow path formed in the housing 10 in a U-shape so as to be located within a plane including the inlet flow path 11 and the outlet flow path 12;
The inlet side 21 of the bypass flow path 20 is branched from the middle of the inlet flow path 11, and the outlet side 22 of the bypass flow path 20 has an on-off valve mounting hole on the opposite side of the outlet flow path 12 across the on-off valve mounting hole 15. It is connected to 15.

Reference numeral 30 denotes an overflow prevention valve provided in the bypass passage 20, and the overflow prevention valve 30 includes a shutoff valve 31, a shutoff flow rate adjustment screw 32, a piston 33 corresponding to changes in source pressure, a return button 34, and these. It is equipped with a biasing spring etc. that biases each one separately.

Reference numeral 40 denotes an on-off valve disposed in the on-off valve mounting hole 15 formed at the connection point between the inlet flow path 11 and the outlet side 22 of the bypass flow path 20 and the outlet flow path 12, and the on-off valve 40 has a T-shaped communication It is composed of a spherical valve body 41 having a hole 42 and packing rings 43, 44 made of Teflon or the like that rotatably support the spherical valve body 41. The on-off valve 40 is the outlet flow path 1
It is held by a stopper 45 screwed into the female thread 14 of No. 2 so as not to be able to escape. The stopper 45 has an opening 46 having a groove for engaging a square spurner and a tapered hole 47 formed in a funnel shape. An interlocking boat-bottom groove 48 is formed on the surface of the spherical valve body 41 in a portion facing the spindle mounting hole 16. 49 is a packing inserted between the stepped portion of the stopper 45 and the stepped portion of the outlet flow path 12.

50 is a spindle that reciprocates the spherical valve body 41, and the spindle 50 has a gland nut 51 screwed into the female thread 17 of the spindle mounting hole 16.
There is a rotatable support. grand nut 51
A handle 52 is attached to the outer end of the spindle 50 protruding from the opening and closing valve attachment hole 15.
A tongue 53 is formed at the inner end of the spindle 50 that projects inward. The tongue-shaped piece 53 engages with the interlocking boat-bottom groove 48 of the spherical valve body 41. Inside the gland nut 51, an O-ring 54 is attached to an O-ring attachment groove formed in the spindle 50. 55 is a packing inserted between the end face of the gland nut 51 and the stepped portion of the spindle mounting hole 16. 60 is a safety valve. 52' is a finger displayed on the handle 52.

In addition, instead of the on-off valve 40 being of the ball valve type shown in the figure, which consists of a spherical valve body 41 and packing rings 43 and 44, a globe-shaped valve consisting of a nozzle-shaped valve seat and a valve body that opens and closes the valve seat may be used. It may be in the form of Although illustration is omitted, in this case, a globe valve type is provided between the inlet flow path 11 and the outlet flow path 12, and between the outlet side 22 of the bypass flow path 20 and the outlet flow path 12. Install on-off valves.

The high-pressure gas container valve configured as described above is constructed in the same way as a conventional high-pressure gas container valve by screwing the male thread 13 into a high-pressure gas container (not shown) and connecting the female thread 14 to a gas device (not shown). It is used for. When the handle 52 is rotated 180 degrees back and forth, the spindle 50
The spherical valve body 41 is reciprocated by 180° as shown in FIG. 3A, B, and C. When the handle 52 is rotated to point the finger 52' downward, the spherical valve body 41
is in the state shown in FIGS. 1 and 3A. At this time, the outlet side 22 of the bypass flow path 20 is blocked,
Since the inlet flow path 11 and the outlet flow path 12 communicate with each other through the communication hole 42 of the spherical valve body 41, gas filling and recovery of residual gas can be performed without passing through the bypass flow path 20, that is, through the overflow gas prevention valve. This can be done without going through the age of 30. Next, when the handle 52 is rotated to turn the finger 52' sideways, the spherical valve body 41 is in the state shown in FIG. 3B. At this time, inlet channel 1
1 is blocked, the bypass flow path 20 and the outlet flow path 12
Since these are in communication with each other through the communication hole 42 of the spherical valve body 41, gas can be released and used through the inlet channel 11, the bypass channel 20, and the outlet channel 12. Next, when the handle 52 is further rotated to point the finger 52' downward, the spherical valve body 41
The state shown in FIG. 3C is reached, the outlet passage 12 is cut off, and the high pressure gas container valve is closed. If gas is discharged during use and there is an overflow of gas due to an earthquake, disaster, etc., the cutoff valve 3 of the overflow prevention valve 30
1 is activated and the release of excess gas is automatically shut off. By opening the cutoff valve 31 with the return button 34, the gas can be released again. Further, even in a modified embodiment in which the on-off valve 40 is of a globe valve type consisting of a nozzle-shaped valve seat and a valve body that opens and closes the valve seat, the same effect as in the case of the above-mentioned ball valve type on-off valve can be applied. can act.

(Effects of the invention) The present invention forms a bypass flow path in the housing of a high-pressure gas container valve so as not to be involved in gas filling and recovery of residual gas, and provides an overflow gas prevention valve in the bypass flow path. Since gas filling and residual gas recovery are not hindered by the overflow prevention valve, gas filling and residual gas recovery are not hindered even though the overflow prevention valve is built into the housing. This allows for smooth and quick collection of waste.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional side view, Fig. 2 is a longitudinal sectional front view taken along the - line in Fig. 1, and Fig. 3 is a, b, and c showing on-off valves. FIG. 10...Housing, 11...Inlet channel, 12
...Outlet channel, 20...Bypass channel, 30...
Overflow prevention valve, 40...open/close valve.

Claims (1)

[Scope of utility model registration request] An inlet flow path, a bypass flow path formed by branching the inlet flow path, and an outlet flow path perpendicular to the end of the inlet flow path are formed in the housing of the high-pressure gas container valve, and the inlet flow path and the bypass flow path are formed. A valve for a high-pressure gas container, characterized in that an on-off valve is disposed at a connection point between the passage and the outlet passage, and an overflow prevention valve is provided in the bypass passage.