JP2001201000A - Gas plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily, quickly and safely perform pressure detecting work using a branch cylinder part 13 in a gas plug provided with a plug housing part 10 for housing a plug body 2, a gas inflow cylinder part 11 for communicating with the plug housing part 10 and flowing gas in the plug housing part 10, a gas outflow cylinder part 12 for communicating with the plug housing part 10 and flowing out the gas from the plug housing part 10 and the branch cylinder part 13 arranged in the gas inflow cylinder part 11 or the gas outflow cylinder part 12 in a communicating state. SOLUTION: A blocking-up screw plug 4 is threadedly engaged with the branch cylinder part 13. The blocking-up screw plug 4 is formed so that a pressure detecting port part 42 is opened outward. A gas pressure detecting valve device 35 is built inside more than the pressure detecting port part 42. The valve device 35 is provided with a valve element 25 energized in the direction for always blocking up the pressure detecting port part 42. The valve element 25 is set so as to open only when connecting an exclusive pressure detecting jig 30 to the pressure detecting port part 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas stopper,
The present invention relates to a gas stopper of a type provided such that a branch cylinder portion communicates with a gas flow path.

[0002]

2. Description of the Related Art FIG. 3 shows a gas inlet tube (11) and a gas outlet tube (12) in a plug housing (10) of a plug body (1).
Are gas stoppers that communicate with each other so that they are arranged coaxially,
In the stopper housing (10), the gas inflow cylinder (11)
Passage hole for communicating or blocking the gas flow path to (12)
The plug (2) formed with (20) is accommodated therein. The plug (2) is rotatable in the plug housing (10) by operating an operation knob (3) connected above the plug (2). A bellows pipe (30), which is an outdoor pipe, is connected to an upstream end of the gas inflow cylinder (11) through a flexible pipe joint (15),
A joint member (16) for connecting a branch pipe is connected to a downstream end of the gas outflow cylinder (12).

In the gas plug shown in FIG. 1, a branch tube portion (13) for detecting pressure is provided between the upstream end of the gas inflow tube portion (11) and the plug accommodating portion (10). It is provided so as to communicate with (11). Normally, when the gas stopper is used, the branch cylinder (13) is closed by the screw stopper (14), and the gas inlet cylinder (11)
Even if the gas passes through, no gas leaks to the outside. Then, at the time of measuring the pressure, the gas is temporarily shut off by a separately provided shutoff means such as a gas cock, and then the screw plug (14) is removed, and a measuring pressure jig (not shown) is attached to the branch cylinder (13). . After that, gas is flowed. The pressure measuring jig is connected to a pressure measuring device via a rubber tube, and thereby, a branch cylindrical portion is provided.
It is possible to detect the gas pressure in the gas flow path on the upstream side of (13).

[0004]

SUMMARY OF THE INVENTION A conventional branch cylinder (13)
Is closed by the screw stopper (14) as described above,
At the time of the pressure measurement, once the gas is shut off on the upstream side of the branch cylinder (13), the screw plug (14) is removed, and the measurement jig is attached to the open end of the branch cylinder (13). Installation work must be performed, and the inspection work is troublesome. Also, if the screw plug (14) is removed by forgetting to shut off the gas, there is a danger of gas leakage. The present invention relates to a "plug housing portion in which a plug is housed, a gas inflow cylinder portion communicating with the plug housing portion and allowing gas to flow into the plug housing portion, A gas outlet tube portion for allowing gas to flow out of the portion, and a gas stopper including a branch tube portion provided in communication with the gas inflow cylinder portion or the gas inflow cylinder portion.
The pressure detection work using the branch tube portion is easily and quickly performed,
Further, it is another object of the present invention to enable safe operation. [1]

[0005]

Means for Solving the Problems To solve the above-mentioned problems, the solution of the present invention is as follows. "A closing screw plug is screwed into the branch cylinder portion, and the closing screw plug is Is formed so as to open outward, and a valve device for gas pressure detection is built inward of the pressure detection port.The valve device always has the pressure detection port. A valve element urged in the closing direction is provided, and the valve element is set to open only when a dedicated test jig is connected to the test port. " That is.

A closing screw plug having a pressure detection port is screwed into the open end of the branch cylinder, and the pressure detection port of the closing screw plug is opened by a valve element of a valve device incorporated in the closing screw plug. It is in a closed state. This allows
The open end of the branch cylinder is closed by the closing screw plug. At the time of pressure detection for the presence or absence of gas leakage, a dedicated pressure detection jig is inserted into the pressure detection port without removing the closing screw plug. Simultaneously with the insertion of the dedicated pressure detection jig, the valve body opens to perform a pressure detection operation. If you remove the test fixture after the test work,
The pressure detection port of the closing screw plug is urged again by the valve body in the valve closing direction and is closed.

[2] The method according to the above [1], wherein a female screw portion is formed on an inner peripheral surface of the inspection port, and the inspection jig comprises:
An insertion tube portion inserted into the inspection port to press the valve body, and a connection tube portion to which a rubber pipe extending from the pressure detection device can be connected, and the insertion tube portion is screwed into the detection port. And the pressing force of the insertion tube portion against the valve body caused by screwing the insertion tube portion into the inspection port is set to be larger than the urging force of the valve body. In the method described above, the insertion tube portion of the test jig is screwed into the test port of the closing screw plug by screwing the insertion tube portion of the test jig into the test port. The inspection jig will be attached. Due to this screwing, the insertion end of the insertion tube moves toward the inside of the closing screw portion, and with this movement, the end face of the valve body is pressed by the insertion end of the insertion tube. Since the pressing force at this time is set to be greater than the urging force of the valve body, the valve body can be opened by screwing the insertion tube portion into the inspection port.

[Claim 3] In each of the above-mentioned items, in the case where the lid for closing the inspection port of the closing screw plug is detachably provided, the lid is removed at the time of the pressure detection. If the above-mentioned test fixture is attached to the test port, the test operation can be performed.

[0009]

When the branch tube is not used, the open end of the branch tube is securely closed by the closing screw plug, so that there is no inconvenience that gas leaks from the branch tube during use of the gas stopper. . In addition, the pressure measurement can be performed without removing the closing screw plug from the branch tube portion, and it is not necessary to shut off the gas at the time of the pressure measurement. It can be carried out. Further, since the valve element of the valve device incorporated in the closing screw portion can be opened only by a dedicated test jig, the valve element is inadvertently opened by another jig or mischief. No, safe. In the gas stopper described in Item 2, the valve body of the valve device can be opened only by screwing the insertion tube portion of the test jig into the test opening of the closing screw portion. The use of the pressure jig has an effect that the pressure measurement operation can be easily performed. Further, in the gas stopper described in the item 3, since the opening of the closing screw stopper is configured to be closed by the lid when not in use, safety when not in use is improved.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
Description will be given based on the drawings. The gas tap of this embodiment is
As shown in FIG. 1, a stopper housing (10) is formed in a stopper main body (1) and accommodates a stopper (2) having an upwardly open inverted truncated cone shape. The tube portion (18) is continuous. A gas inflow cylinder (11) is formed so as to be continuous with the plug main body (1) and communicate with the bottom side of the plug housing (10), and a side wall of the trunk of the plug housing (10). Is formed so as to communicate with a gas outflow cylinder (12). That is, the stopper main body (1) has a configuration in which a substantially inverted L-shaped gas flow path centering on the stopper accommodating portion (10) is formed. A flexible pipe joint (15) is connected to an upstream end of the gas inflow cylinder (11), and a flexible pipe for gas supply continuous from an outdoor pipe is connected to the flexible pipe joint (15). On the other hand, gas outflow cylinder (12)
At the downstream end of the gasket, a joint member (16) is connected, and the joint member (16) is connected to, for example, a gas rubber tube (not shown) for sending gas to a gas stove as a gas appliance. used.

A housing (18) of the plug body (1) houses a drive shaft (17) connected to the plug (2) in a rotation-blocking state, and an upper portion of the drive shaft (17). An operation knob (3), which is also connected to the drive shaft (17) in a rotation-blocking state, is mounted thereon. With this, the plug (2)
By operating the operation knob (3), the stopper housing (1
It is rotatable within 0). The plug (2) has a plug housing
In the state accommodated in (10), the plug (2) so as to correspond to the gas inflow cylinder (11) and the gas outflow cylinder (12), respectively.
A substantially inverted L-shaped gas passage hole (20) is formed in the bottom and the body of the plug, and by operating the operation knob (3), the plug is turned off.
By rotating (2) in the plug accommodating portion (10), the gas passage hole (20) can be opened and closed with respect to the gas outlet tube portion (12).

The plug body (1) of this embodiment is provided between the connecting end of the gas inlet tube (11) on the flexible pipe joint (15) side and the plug housing (10). The branch tubular portion (13) is formed so as to communicate with the gas inflow tubular portion (11). Branch tube
A tapered screw portion (14) is formed on the inner peripheral surface on the open end side of (13), and the open end is closed by a closing screw plug (4). The closure screw plug (4) is connected to the branch tube (13).
Taper screw shaft that can be screwed into the taper screw (14)
(40) and a spanner engaging part (41) following the tapered screw shaft part (40)
And a pressure measurement mouthpiece portion (42) following the spanner engagement portion (41), and a valve device (35) incorporated inside the pressure measurement mouthpiece portion (42). While screwing the tapered screw shaft portion (40) onto the tapered screw shaft portion (14), the wrench engaging portion (41) is tightened with a wrench, and the tapered screw shaft portion (40) is tightened to the tapered screw shaft portion (14) until it reaches the final tightening position. As a result, the closing screw plug (4) is attached to the open end of the branch tube (13). Since these threaded portions are mutually tapered, gas does not leak from both threaded portions.

A closing valve (25) urged in a valve closing direction by a spring (24) is incorporated in the valve device (35).
The size and shape of the head portion are set so that the head portion just fits into the tapered surface portion provided inwardly of the pressure detection mouthpiece portion (42). Further, it is assumed that the urging force of the spring (24) is set so as not to be opened even if the closing valve (25) is pressed by mischief or the like. In addition, on the inner peripheral surface of the test pressure mouth tube portion (42), an insertion tube portion (3
A female screw portion (43) into which 2) can be screwed is formed. The lid having an external thread (26) that can be screwed to the female thread (43) when the branch cylinder (13) is not used is provided at the open end of the inspection mouth cylinder (42). (27) is screwed and closed.
Since the lid (27) is connected to the closing screw plug (4) by the connecting tool (28), as shown in FIG. 2, the lid (27) is connected to the measuring mouthpiece (42). There is no inconvenience that the lid body (27) is lost during the pressure measurement performed by removing the lid.

As described above, the open end of the branch cylindrical portion (13) is double-closed by the closing screw plug (4) having the closing valve (25) and the lid (27). The gas inflow cylinder
When passing gas from outdoor piping through (11),
The gas does not leak out from (13). In order to measure the gas pressure on the upstream side of the branch tube portion (13) by using the branch tube portion (13), first, the lid body (27) is connected to the test tube portion of the closing screw plug (4). Remove from (42). Even when the lid (27) is removed, the gas does not leak because the closing screw plug (4) is closed by the closing valve (25). Therefore, there is no need to temporarily shut off the gas during the pressure measurement work.

The valve device (3) built in the closing screw plug (4)
To open the closing valve (25) in 5), use the special test fixture (30)
Is used. The test jig (30) includes an insertion tube (32) to be inserted into the detection tube (42) of the closing screw plug (4) and an insertion tube.
A pressing portion (34) provided at the further end of (32), and an insertion tube portion
(32) extending in a direction opposite to the pressing portion (34), and
A connection tube (33) to which a rubber tube (31) attached to (44) can be connected, and an outer circumferential surface of the insertion tube (32) is provided with a female tube of the pressure detection tube (42). Male thread that can be screwed into the thread (43)
It is assumed that (37) is formed.

The insertion tube portion (32) of the test jig (30) has a male screw portion.
The (37) is screwed into the female screw portion (43) of the detection mouthpiece (42), so that it is screwed and inserted into the closing screw plug (4). By this screwing, the end surface of the pressing portion (34) on the insertion end side of the insertion tube portion (32) is moved inward from the pressure detection mouth tube portion (42), and the head of the closing valve (25) is moved. Is pressed. Due to the pressing force of the pressing portion (34) against the closing valve (25) by screwing in the insertion tube portion (32),
It is assumed that the closing valve (25) is set to open. In other words, the urging force of the spring (24) is set to be larger than the pressing force against the closing valve (25) due to mischief or the like, and smaller than the pressing force due to the screwing of the insertion tube (32). Become.

A rubber tube (31) extended from the pressure detection device (44) is previously provided in the connection tube portion (33) as shown by a two-dot chain line in FIG.
By connecting the dedicated pressure measurement jig (30) to the closing screw plug (4) screwed to the branch tube (13), the upstream of the branch tube (13) Side gas inlet tube (1
1) The gas pressure inside can be detected. In this way, just attach the test fixture (30) directly to the obstruction screw plug (4),
Immediately, the test can be carried out, and the plug screw (4)
It is not necessary to remove the gas from the branch tube portion (13), and it is not necessary to temporarily shut off the gas at the time of the pressure measurement work, so that the pressure measurement work can be performed quickly and easily without trouble. In addition, the closing valve (25) does not open unless the insertion tube (32) of the dedicated test pressure jig (30) is screwed into the female screw portion (43) of the test pressure test tube (42). Since the shut-off valve (25) is not inadvertently opened by another jig or mischief, there is no fear of gas leakage and the safety is ensured.

It is to be noted that the portion of the detection mouthpiece portion (42) of the closing screw plug (4) is not always necessary, and as shown in FIG. It is good also as a structure which shortens the whole length of a screw stopper (4). In this case, the female screw part (43) for screwing the male screw part (26) of the lid (27) and the insertion cylinder part (32) of the test jig (30) is connected to the spanner engaging part (41). It may be formed on the inner peripheral surface. In each of the above embodiments,
Although the branch tube portion (13) is provided between the upstream end of the gas inflow tube portion (11) and the plug accommodating portion (10), the branch tube portion (13) is provided in the gas outflow tube portion (12). A configuration may be provided between the downstream end and the stopper housing (10).

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which a closing screw stopper is attached to a branch cylinder part of a gas stopper according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a test fixture is mounted on the closing screw stopper of FIG. 1;

FIG. 3 is an explanatory view of another example of a closing screw stopper.

FIG. 4 is an explanatory view showing an example of a conventional gas stopper including a branch tube part for pressure detection.

[Explanation of symbols]

 (1) ・ ・ ・ ・ ・ ・ ・ ・ Plug body (10) ・ ・ ・ ・ ・ ・ ・ Plug receiving part (11) ・ ・ ・ ・ ・ ・ ・ Gas inflow cylinder part (12) ・ ・ ・ ・ ・・ ・ ・ Gas outflow tube (13) ・ ・ ・ ・ ・ ・ ・ ・ ・ Branch tube (2) ・ ・ ・ ・ ・ ・ ・ Plug (14) ・ ・ ・ ・ ・ ・ ・ ・ ・ Taper screw (4)・ ・ ・ ・ ・ ・ ・ ・ Operating screw plug (40)・ Valve device (25) ・ ・ ・ ・ ・ ・ ・ Valve (close valve) (30) ・ ・ ・ ・ ・ ・ ・ ・ Testing jig

Claims (3)

[Claims] A plug accommodating section accommodating a plug body; a gas inflow cylinder communicating with the plug accommodating section and allowing gas to flow into the plug accommodating section; A gas outlet tube portion for allowing gas to flow out of the portion, and a gas stopper including a branch tube portion provided in communication with the gas inflow tube portion or the gas inflow tube portion. The closing screw plug is screwed together, and the pressure detection port is formed so as to open outward, and a valve device for gas pressure detection is built inward of the pressure detection port. The valve device is provided with a valve body urged in a direction to always close the inspection port, and the valve element connects a dedicated inspection jig to the inspection port. A gas stopper characterized in that the valve is set to be opened only when the valve is opened. 2. The gas stopper according to claim 1, wherein a female screw portion is formed on an inner peripheral surface of the inspection port, and the inspection jig is inserted into the inspection port to open the valve. An insertion tube portion for pressing the body, and a connection tube portion to which a rubber tube extending from the pressure detection device can be connected; the insertion tube portion is configured to be screwably connectable to the pressure detection port; A gas stopper in which a pressing force of the insertion cylinder portion against the valve body caused by screwing the insertion cylinder portion into the inspection port is set to be larger than an urging force of the valve body. 3. The gas plug according to claim 1, wherein a lid for closing the inspection port of the closing screw plug is detachably provided.