JP2003343762A - Valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly safe valve device comprising a cylindrical body, a valve element for opening/closing a channel inside the cylindrical body and an operation part for operating the valve element to be opened/closed, capable of preventing the valve element from being unintentionally opened. <P>SOLUTION: The valve elements 20 and 30 are screwed with the inside of the cylindrical bodies 13 and 14, and channels are opened/closed according to the forward/backward movement of the valve elements inside the cylindrical bodies as the valve elements are screwed. The operation part consists of operation cylinder parts 21 and 31, which are detachably and rotatably attached to open ends of the cylindrical bodies 13 and 14 respectively. The valve elements 20 and 30 can be connected to the operation cylinder parts 21 and 31 in such a way that the relative rotation is prevented. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve device, and more particularly to a valve device having a valve body in which a flow passage in a cylinder is opened / closed by operating an operating portion.

[0002]

2. Description of the Related Art As a valve device, a valve device having a normally closed slide valve for urging a valve element toward a valve seat by a spring is generally incorporated.

The one shown in FIG. 8 is one in which the valve device having the above-mentioned slide valve built therein is mounted on one of the connecting cylinders (40a) of the three-way joint (4) for connecting gas pipes. is there. The valve device includes a plug portion (41) attached to an open end of the first connection tubular portion (40a), and a flow path accommodated in the plug portion (41) and opening and closing a flow passage in the plug portion (41). Disc (42) and disc
The valve body (42) is housed on the inner side of the plug portion (41) than the (42)
And a spring (59) for urging the valve seat (43) provided near the open end of the plug portion (41) so as to be in close contact with the valve seat (43).

Another second connecting tube portion (40b) of the three-way joint (4)
Is connected to the gas outlet pipe (50) of the gas meter (M), and the other third connecting cylinder part (40c) is connected to the feed pipe (5) for feeding gas into each home. I shall.

The plug portion (41) attached to the first connecting cylinder portion (40a) is for connecting the socket (45) at the tip of the gas hose extended from the gas leakage inspection instrument (K). Although not shown in detail, the socket (45) fits into an annular groove (58) formed on the outer periphery of the tip of the plug part (41) when it is mounted on the plug part (41). Built-in conventional coupling device consisting of a locking ball to be inserted, a pressing shaft for pressing the valve body (42) inward, and an advance / retreat cylinder protruding forward of the socket by a spring when attached to the plug part This is a socket for connecting the gas hose.
When the plug part (41) is inserted into the socket (45),
The valve body (42) is pushed inward by the pressing shaft and the valve seat (42)
By being separated from (43), the inside of the plug part (41) opens. As a result, the gas leakage inspection instrument (K) and the gas flow path (46) of the three-way joint (4) are connected to each other, and the gas leakage inspection instrument is connected.
(K) makes it possible to inspect for gas leaks. or,
By using a gas hose connected to the plug part (41), it is possible to confirm air bleeding in the gas meter (M).

When the socket (45) is removed from the plug part (41),
The return force of the spring (59) pushes the valve body (42) outwardly to bring it into close contact with the valve seat (43) and close the plug portion (41). In this way, by simply mounting the socket (45) on the plug part (41) connected to the connection cylinder part (40a), it is possible to check the gas leak and confirm the air vent in the gas meter (M). Gas leak inspection and air bleeding confirmation work can be performed even when the householder is absent, and work can be performed efficiently.

[0007]

However, the valve device provided in the conventional joint has a built-in slide valve that opens when the valve body (42) is pushed inward. Therefore, there is a problem that the valve is inadvertently opened due to erroneous operation or mischief. When the plug part (41) is not used, as shown in the figure, the cap (47) is tightly covered to prevent gas leakage from the plug part (41) when not in use. Since 47) can be easily removed, erroneous operation and mischief cannot be reliably prevented.

According to the present invention, in a "valve device including a tubular body, a valve body that opens and closes a flow path in the tubular body, and an operating tubular portion that opens and closes the valve body," the valve body is carelessly provided. An object is to provide a highly safe valve device that does not open.

[0009]

[Means for Solving the Problems] * 1 The technical means of the present invention for solving the above problems is that "the valve body is provided so as to be screwed into the cylindrical body, and the screwing is performed. It is set so that the flow path is opened and closed by the forward / backward movement in the tubular body due to the operation, and the operating portion is a tubular operating tubular portion and is detachable from the open end of the tubular body. And is rotatably provided, and the valve body can be connected to the operation cylinder portion in a relative rotation preventing state ”.

The above technical means operates as follows. A female screw portion is formed in the cylindrical body, and a male screw portion that can be screwed into the female screw portion is formed on the outer periphery of the valve body so that the valve body is screwed into the cylindrical body. With the screwing, it is possible to move back and forth inside the cylinder. An operation cylinder portion as an operation portion is rotatably provided at the open end of the cylinder body, and the valve body is also rotated in the same direction with the rotation, so that the cylinder body is axially moved in the axial direction. It will move forward and backward. Therefore, if the operation tube portion is rotated so that the valve body moves in the valve opening direction, the flow passage in the tube body is opened, and if the operation tube portion is rotated in the opposite direction, the valve is opened. The body moves in the valve closing direction and the flow path in the cylinder is closed. Along with the opening and closing of the flow passage in the cylinder, the flow passage in the operation cylinder portion is also opened and closed.

When the tubular body is not used, the operating tubular portion can be removed, and the valve body is operated only by rotating the operating tubular portion.
When the operating cylinder is removed, the valve body can maintain the valve open state or the valve closed state in the cylinder body.

[0012] In Paragraph 1 of paragraph 2, "the open end of the tubular body can be closed by a closing plug when the operating tubular portion is not attached", the tubular body with the operating tubular portion removed. The valve body is not exposed to the outside or foreign matter enters from the open end of the body.

* 3 In the above item 1 or 2, "the cylinder is provided so as to communicate with a gas main flow passage from an upstream end to a downstream end of the gas pipe joint, and the gas main flow passage is blocked. In this state, by opening the valve body, one of the upstream end or the downstream end of the gas pipe joint is communicated with the cylindrical body, and the auxiliary flow path is formed. The gas valve can be used for a gas pipe joint provided between a gas outlet pipe of a gas meter and a feed pipe for feeding gas indoors, and the valve body can be used as a main gas flow path from the gas meter. It can function as a switching valve that switches to an auxiliary flow path that connects the feed pipe side and the operation cylinder side. After the replacement work of the gas meter, by setting the opening and closing of the valve body so that the gas from the gas meter flows to the operation tube side, it is possible to confirm the completion of air removal from the gas meter using the operation tube part. By connecting a gas leakage inspection tool to the operation tube portion, it is possible to perform an airtightness inspection in the circuit. Also, connect the gas hose to a fuel container, and set the valve body so that the valve body opens and closes so that the flow passage is opened from the operating cylinder to the feed pipe when the gas from the gas meter is stopped. For example, the gas can be continuously supplied from the fuel container to the interior even while the gas meter is being replaced.

* 4 In the above items 1 to 3, "the operating tube portion has one end protruding outward from the open end of the tubular body in a state of being attached to the tubular body, and a tube for connecting a gas hose. The insertion shaft protrudes from the other end of the valve body,
In the case where the insertion shaft is formed with a hole into which the relative rotation is prevented, the operation cylinder portion can function as a gas hose connection cylinder portion for connecting a gas hose provided separately. Further, when the operation tube portion is attached to the connection tube portion, the insertion shaft of the operation tube portion is inserted into the hole formed in the valve body, and the operation tube portion and the valve body rotate together. It will be. That is, by rotating the operation tube portion, the valve body can be screwed into the connection tube portion, and the flow path in the connection tube portion can be opened and closed depending on the moving distance.

* 5 In the above item 4, "In the pipe connector according to claim 4, a socket for connecting a gas hose is attached / detached to / from a portion of the operating tubular portion that is projected outward from the tubular body. It is a possible plug part ”, the shape of one end of the operating tube part,
It suffices to match the outer shape of a general plug portion in which an annular groove is formed in the outer peripheral portion of the tip, and the socket has a locking ball that fits into the annular groove when attached to the plug portion, A socket for connecting a gas hose having a built-in conventional coupling device having an advancing / retreating cylinder that is biased in a direction projecting forward of the socket by a spring may be used.
As a result, the socket can be attached to and detached from the plug portion with one touch.

[0016]

The present invention, having the above-mentioned structure, has the following unique effects. The valve body is configured to move forward and backward while screwing in the cylinder body, and the screwing operation of the valve body is possible only by the operation cylinder portion inserted into the cylinder body.
When the tubular body is not used, by removing the operating tubular portion, there is no inconvenience that the valve body is inadvertently opened / closed due to erroneous operation or mischief. Therefore, a highly safe valve device can be provided.

In addition to the above effects, in the item (2), the safety is further improved by closing the open end of the cylindrical body with a closing plug when not in use.

Further, in the item (3), the valve body is provided in the connecting cylinder portion of the joint for connecting gas pipes, and
Since the valve element was made to function as a switching valve that switches from the main gas flow path to the auxiliary flow path, when replacing the gas meter, even if the gas flow path is blocked on the upstream side of the gas meter, it will continue to be fed to the indoor gas appliance. Gas can be sent to the pipe from the auxiliary flow path, and the gas meter can be replaced without stopping the supply of gas indoors. Also, the air bleeding work after replacing the gas meter can be completed only by the outdoor work, which saves the trouble of going up to the equipment installation place in each home to check the air bleeding, and even when the housekeeper is absent. Since the replacement work can be performed, the gas meter can be replaced easily, and the efficiency of the replacement work is improved.

According to the item (4), since the operating cylinder portion and the valve body can be rotated together by simply inserting the operating cylinder portion into the cylindrical body, the structure and operation of the valve device are simplified. There is an effect such as. In paragraph 5, if each gas hose is equipped with a socket as a connecting tool at the tip thereof, it can be attached / detached to / from each of the operation tube parts configured like a plug part of a general gas plug with one touch. The gas hose can be attached easily and reliably without taking time and effort to attach it to the tubular portion.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the embodiments of the present invention described above will be described in detail with reference to the drawings. The valve device according to the embodiment of the present invention is configured to be provided in the gas pipe connecting joint connected to the gas outlet pipe (50) of the gas meter (M).

The gas meter (M) has an internal structure similar to that of the conventional one, and as shown in FIG. 1, a gas inlet pipe (51) and a gas outlet pipe (50) project from the upper surface of the meter body. The intake pipe (55) connected to the upstream side of the gas inlet pipe (51) is provided with a gas plug (56) for opening and closing the flow path. In this embodiment, the joint connected to the gas outlet pipe (50) is replaced with a four-way open pipe joint (1) incorporating the valve device of the embodiment of the present invention.

The pipe joint (1) has four connection ports that are opened vertically and horizontally, and connects the lower open end of the first connection tubular part (11) to the gas outlet pipe (50). The feed pipe (5) communicating with the indoor pipe (53) is connected to the second connecting cylinder part (12) opened to one side through the straight pipe (52) and the bending pipe (54). It

The third connecting tube portion (13) is the second connecting tube portion (12).
It is opened to the side opposite to and the fourth connecting cylinder (1
4) is provided so as to open upward, and has a mode in which a cross-shaped passage hole is formed throughout.

In normal use of the gas, the third,
The open ends of the fourth connecting cylinders (13) and (14) are respectively closed screw caps (1
5) It is closed in an airtight state by (16), and the intake pipe is
The gas sent from (55) passes through the gas meter (M) and then, as shown by the arrow in FIG. 2, the first connecting cylinder part (11).
Is the upstream end, and the second connecting cylinder part (12) is sent indoors through the substantially inverted L-shaped main gas flow path (10).

As shown in the figure, female screw portions (17a) and (17b) are formed on the inner peripheral surfaces of the third and fourth connecting cylinder portions (13) and (14), respectively. The valve body as the switching valve (30) is housed so as to be screwed into the female screw portion (17a) of the tubular portion (13), and the female screw portion (17b) of the fourth connecting tubular portion (14) is also accommodated. A valve body serving as an on-off valve (20) is housed so as to be screwed into.

At the inner ends of the third and fourth connecting tube portions (13) and (14),
A valve seat part that receives the on-off valve (20) and the switching valve (30), respectively.
(19a) and (19b) are formed, and when the on-off valve (20) and the switching valve (30) are tightened until reaching the final tightening position, the on-off valve (20) and the switching valve (30) are Seat (19a) (19b)
It becomes a mode that it is pressed tightly.

2 and 3 are provided on the bottom surface of the on-off valve (20).
As shown in, an annular groove is formed and a sealing annular packing (25) is fitted in the annular groove, and when the on-off valve (20) is pressed against the valve seat portion (19b), The packing (25) comes into close contact with the valve seat portion (19b),
The fourth connecting cylinder portion (14) is closed in an airtight outer peripheral state.

An annular packing (36) for sealing is also fitted on the bottom surface of the switching valve (30), which is the valve seat portion (19a).
When it is pressed by, the main gas flow path (10) is shut off and the opening / closing valve (20) is opened, so that the third connecting cylinder part (13) communicates with the first connecting cylinder part (11). Is set to.

That is, when the normal gas is used, the on-off valve (20) is pressed against the valve seat portion (19b), but the switching valve (30) is pressed against the valve seat portion (19a). However, the main gas flow path (1
0) is open.

The following is a description with reference to the construction procedure for gas meter replacement work. First, when replacing the gas meter (M), before removing the meter body, the closing screw plug (16) is removed with a tool to open the fourth connecting cylinder part (14). Even if the fourth connecting cylinder part (14) is opened, the fourth connecting cylinder part (14) is closed in the airtight state by the on-off valve (20), so that the gas main flow path is released from the fourth connecting cylinder part (14). The gas in (10) does not leak out. Then, instead of the closing screw plug (16), as shown in FIG. 4, a screw tube member (22) in which a gas supply plug (21) is fitted is screwed to the open end of the fourth connection tube portion (14). Make a connection.

The gas supply plug (21) is integrally formed in a state in which it is relatively rotatably inserted into the screw cylinder (22), and the screw cylinder (22) is connected to the fourth connecting cylinder. It is attached by being screwed into a female screw portion (18b) formed on the open end side of the portion (14) and having a diameter larger than the female screw portion (17b).

On the outer periphery of the tip of the gas supply plug (21),
An annular groove (23) is formed like the plug part to which a general gas hose connecting socket is connected, and a lift valve (44) biased in the normally closed direction by a spring is built in. There is. A pair of insertion shafts is provided on the bottom surface projecting to the inner side of the screw cylinder material (22) so as to be located at both ends of the diameter.
(24) is projected.

As shown in FIG. 3, four notches (20a) are formed at intervals of 90 degrees on the periphery of the on-off valve (20), and the insertion shaft (24) has the notches (20a). ), The on-off valve (20) is set so as to rotate together with the gas supply plug (21) by being just inserted into two of the opposed positions.

For example, turn the gas supply plug (21) in the screw tightening direction (clockwise) with respect to the screw cylinder (22) screwed to the open end of the fourth connecting cylinder (14). When operated, the on-off valve (20) descends the female thread (17b), and when the gas supply plug (21) is tightened until it reaches the final tightening position, the packing (25) causes the valve seat (25) to move. 19b), and the fourth connecting cylinder part (14) is closed in an airtight state.

On the contrary, when the gas supply plug (21) is rotated in the direction for loosening the screw (counterclockwise), the on-off valve (20) ascends the female screw portion (17b), so that the valve seat portion (19b). ), The gas supply plug (21) communicates with the inside of the joint (1) through the cutout (20a) of the on-off valve (20).

Thus, the on-off valve (20) and the gas supply plug
The valve device (2) for opening and closing the fourth connection tubular portion (14) is constituted by the (21) and the screw tubular material (22), and the on-off valve (20) is opened as described above. After that, on the gas supply plug (21),
As shown by the chain double-dashed line in the figure, the socket (26) for connecting the gas hose is connected.

The socket (26) is spring-loaded from the open end of the outer cylinder.
Advancing / retracting cylinder (27) protruding by the biasing force (not shown)
And a one-touch coupling type connector for a general gas hose, which has a built-in pressing shaft and a locking ball (both not shown) for pressing the lift valve (44) inward, can be adopted. When the gas supply plug (21) is inserted into the socket (26), the pressing shaft is moved to the lift valve.
(44) is pushed inward to open the gas supply plug (21), and the locking ball is connected to the gas supply plug (21).
The socket (26) is retained in the gas supply plug (21) in a state in which the socket (26) is fitted in the annular groove (23) and the advancing / retreating cylinder (27) projects forward by a predetermined distance by the urging force of the spring. Be attached to.

This socket (26) is attached to the downstream end of the gas hose (28) connected to the gas cylinder (B), and by opening the on-off valve (20) and attaching the socket (26), The gas discharged from the gas cylinder (B) passes through the gas auxiliary flow path (29) through the valve device (2) in the valve open state, as shown by the arrow indicated by the alternate long and short dash line in FIG. The straight pipe (52) continuing to the feed pipe (5) is fed from the second connecting tubular portion (12).

Next, the blocking screw plug (15) of FIGS. 1 and 2 is removed, and instead, the screw tubular member (32) having the gas pressure inspection plug (31) inserted therein is attached to the third connecting tubular portion (13). ) Twist it to the open end and attach it.

A socket (38) is connected to the gas pressure inspection plug (31) as shown by a two-dot chain line in FIG. 4, and the socket (38) is connected via a gas hose (37). It is connected to a pressure gauge (39) for measuring gas pressure, and the gas hose (37) is branched so that the pipe joint is connected from the third connection port (13).
Rubber manual pump (49) for pumping air into (1)
And the open end for air bleeding (48)
a) Assume that they are connected via (49a).

The gas pressure inspection plug (31) is formed in the same shape as the gas supply plug (21), and the other end inserted into the third connection tubular portion (13) has a square shaft portion (33). Has become. A hole portion (34) communicating with the inside of the gas pressure inspection plug (31) penetrates through a side wall portion of the square shaft portion (33). Further, the switching valve (30) is formed with a square hole (35) capable of accommodating the square shaft portion (33) in a relative rotation preventing state, and the square shaft portion (35) is formed in the square hole (35). In the state in which 33) is housed, the valve device (3) is formed by the switching valve (30), the gas pressure inspection plug (31), and the screw tubular material (32).

When using normal gas, the switching valve (30)
2 is located on the open end side of the third connecting tube portion (13), the closing screw plug (15) is removed, and a gas pressure inspection plug (31) is provided. When the screw tubular member (32) is attached, the angular shaft portion (33) of the gas pressure inspection plug (31) is deeply fitted into the angular hole (35) of the switching valve (30). From this state, the gas pressure inspection plug (31) is rotated in the screw tightening direction (clockwise). By rotating the gas pressure inspection plug (31), the switching valve (30) is also rotated in the same direction, and is moved inward while being screwed into the female screw portion (17a). When the gas pressure inspection plug (31) is rotated until the switching valve (30) reaches the final tightening position, the switching valve (30) has the annular packing (36) provided at the bottom thereof and the valve seat portion (19b). ) Is pressed in an airtight state. As a result, the gas from the gas meter (M) flows from the first connecting cylinder part (11) to the third connecting cylinder part (13) and at the angular axis part as indicated by the arrow shown by the solid line in FIG. It flows into the space outside of (33), and further flows from the hole (34) toward the outside in the gas pressure inspection plug (31).

In this state, the gas plug (56) is closed to shut off the gas on the upstream side of the gas meter (M), and then the gas meter (M) is replaced. By closing the gas stopper (56), the gas from the intake pipe (55) is shut off, but the gas pipe to the indoor pipe (53) is the same.
The gas from (B) will be supplied through the gas auxiliary flow path (29). Therefore, even during the gas meter replacement work,
You can continue to use the gas appliance (57) indoors.

After the replacement work is completed, the on-off valve (49a) is opened to open the flow passage communicating with the rubber manual pump (49) in the gas hose (37), and the valve device (from the pump (49) ( 3)
Air is forced into the fitting (1) via the pressure gauge (39).
The gas tightness test of the gas meter (M) and the gas meter connecting portion is performed by using the above, and after the completion of the air tightness test, the on-off valve (49a) is closed.

After that, the opening / closing valve (48a) is opened and the gas plug (56) is opened. The gas from the intake pipe (55) flows into the pipe joint (1) from the gas outlet pipe (50) while pushing the air in the newly installed gas meter (M) to the downstream side, and for gas pressure inspection according to the arrow. The gas flows from the plug (31) into the gas hose (37) connected to the socket (38) and is discharged from the open end (48) to the outside. It can be confirmed that the air bleeding is completed by the smell of the gas flowing out from the open end portion (48), an ignition test, or the like.

After confirming the completion of air bleeding, the socket (38) is removed from the gas pressure inspection plug (31), and at the same time, the gas pressure inspection plug (31) is rotated in the direction for loosening the screw (counterclockwise). The switching valve (30) is moved to the open end side of the third connection tubular portion (13) to shut off the flow path to the gas pressure inspection plug (31). As a result, the gas main flow path (10) is opened.

Then, the socket (26) is subsequently removed from the gas supply plug (21) and at the same time, the gas supply plug is removed.
Turn (21) in the direction that tightens the screw (clockwise),
The on-off valve (20) is pressed against the valve seat (19b) so that the gas auxiliary flow path (2
9) Shut off. At this time, since the indoor flow path is switched from the gas auxiliary flow path (29) to the gas main flow path (10), the indoor gas supply is continuously performed.

Finally, the closing screw plugs (15) and (16) are screwed into the third connecting cylinder part (13) and the fourth connecting cylinder part (14), respectively, and the gas meter replacement work is completed. In this way, even during the replacement work of the gas meter (M) without stopping the supply of gas indoors, and because the necessary air bleeding confirmation work can be performed only outdoors, even when the housekeeper is absent, The gas meter (M) can be replaced easily and quickly. The on-off valve (20) and the switching valve (30) provided on the valve device (2) (3) can be opened and closed unless the plugs (21) and (31) are connected and rotated. Since the valve devices (2) and (3) are set so as not to be operated, the valve devices (2) and (3) are not operated by an erroneous operation or a mischief when not in use, and are highly safe.

FIGS. 5 to 7 are explanatory views of another example of use of the valve device according to the embodiment of the present invention. In this structure, the feed pipe (5) and the intake pipe (55) are arranged so as to be located on the back side of the gas meter (M). As shown in FIG. The outlet pipe (50) is fitted with the first connecting cylinder part (11) of the pipe joint (1) having substantially the same structure as that adopted in the first embodiment, and the second connecting cylinder part. (12) is extended to the rear of the gas meter (M) and its extended end is hung down and connected to the feed pipe (5). Further, in this embodiment, as shown in FIG. 6, the gas meter (M) and the intake pipe (5
5) In the middle of an inverted U-shaped connecting pipe (60) connecting with (5), a gas stopper (6) having a built-in closure (61) is provided, and a valve device is provided in the gas stopper (6). To do.

The gas stopper (6), like a normal gas stopper, has an upper operating lever (62) and an internal closing member (61) configured to prevent relative rotation. It is possible to open and close the closure (61) by rotating the (62). The closing (61) has a first communication hole (61a) that opens to the connecting pipe (60) on the side of the lead-in pipe (55) during normal use of gas.
And a second communication hole (61b) opened to the connection pipe (60) on the gas meter (M) side and a first and second communication hole (61a) (61b) formed at an angle of 90 degrees. The third communication hole (61c) that is opened and the fourth communication hole (61d) that is open above the closure (61) are penetrated so as to communicate with each other. A female screw portion is formed on the inner peripheral surface of the fourth communication hole (61d). Then, on the top surface of the operation lever (62), there is a fourth communication hole.
The screw hole (62a) corresponding to (61d) is penetrated.

An opening / closing plug (63) having the same structure as the opening / closing valve (20) adopted in the first embodiment is provided in the fourth communication hole (61d) during normal use of the gas. It is housed in a closed state in which it is screwed to the final tightening position in the screw part, and a plug plug (68) is screwed on the upper part thereof.

In addition, the screw hole (62
(a) is closed in an airtight state by means of a screw plug (64) and a blind plate (65). Therefore, the gas from the intake pipe (55) passes through the first and second communication holes (61a) (61b) of the gas plug (6) and the connection pipe (60) and the gas inlet pipe (51). Sent to the gas meter (M), and the gas outlet pipe (5
From (0), it will be sent to the feed pipe (5) from the first connecting cylinder part (11) of the pipe joint (1) through the second connecting cylinder part (12).

When replacing the gas meter (M), as shown in FIG. 5, the fourth connecting cylinder (1) of the pipe joint (1) is
The valve device (2) is attached to 4) and the on-off valve (20) is opened. Gas supply plug even if the on-off valve (20) is opened
Since (21) is closed by the lift valve (44), there is no inconvenience that gas leaks from the gas supply plug (21).

Next, with a special tool, the blind plate (65) and the screw plug (64) of the operating lever (62) of the gas plug (6) are removed, and the plug plug (4d) of the fourth communication hole (61d) is removed. 68) is also removed, and as shown in FIG. 7, a screw cylinder material (67) equipped with a plug (66).
Is screwed into the fourth communication hole (61d). The combination of the plug (66) and the screw tubular member (67) and the procedure for attaching to the fourth communication hole (61d) are the same as those of the valve device (2) described in the first embodiment. The procedure is the same as the procedure for attaching to the fourth connecting tube portion (14). Then, by rotating the plug (66) in a predetermined direction, the opening / closing plug (63) is moved upward in the fourth communication hole (61d), and the valve is opened.

Thereafter, the plug (66) shown in FIG. 7 and the gas supply plug (21) shown in FIG. 5 are provided with first and second sockets (71) (72) provided at both ends of the gas hose (7). Connect each. This allows the plug (66) and the gas supply plug (2
It will be opened to 1) and will be connected via the gas hose (7).

Then, by rotating the operating lever (62) of the gas stopper (6) 90 degrees counterclockwise, the gas stopper (6) is rotated.
Becomes the state shown in FIG. 7, and the first and second communication holes (61a)
(61b) is closed, and at the same time, the third and fourth communication holes (61c) (6
1d) will be connected. This allows the lead-in pipe (5
The gas sent from 5) is not sent to the gas meter (M) as shown by the two-dot chain line arrow in FIG.
From the third communication hole (61c) of (6), through the fourth communication hole (61d), it is sent to the upper side of the closure (61), from the plug (66) to the first socket (71), the gas hose (7). ), Is sent to the gas supply plug (21) of the valve device (2) shown in FIG. 5 through the second socket (72), and as shown by the double-dashed line arrow in FIG. It will be sent from the part (14) to the feed pipe (5) through the second connecting cylinder part (12).

In this state, the gas meter (M) is replaced, and then the pipe fitting is replaced with the pipe joint as in the case of the first embodiment.
Through the valve device (3) and the socket (38) to be connected to the third connecting tubular portion (13) of (1), the pressure gauge (39) and the air bleeding open end (4
8) Perform airtightness inspection, degassing, etc. using the manual pump (49).

After the replacement work of the gas meter (M) is completed, the plug
After rotating (66) to close the fourth communication hole (61d) with the opening / closing plug (63), the screw cylinder (67) is removed from the gas plug (6), and the plug plug ( 68) may be screwed together, and the screw hole (62a) may be closed by the screw plug (64) and the blind plate (65).

As described above, in the second example of use, as in the case of the first example of use described above, the gas meter can be replaced only outdoors, and the gas from the lead-in pipe (55) can be supplied. , The feed pipe without passing through the gas meter (M)
Since it can be sent to (5), it is not necessary to prepare the gas cylinder used in the first usage example.

[Brief description of drawings]

FIG. 1 is a front view showing a pipe structure of a gas meter showing a state in which a pipe joint incorporating a valve device according to an embodiment of the present invention is connected to an outlet pipe of the gas meter.

FIG. 2 is an enlarged cross-sectional view of a main part of FIG.

FIG. 3 is a bottom view of the on-off valve on-off valve (20).

FIG. 4 is an enlarged cross-sectional view of an essential part showing a state in which a pipe joint incorporating the valve device according to the embodiment of the present invention is connected to an outlet pipe of a gas meter, showing a case where the gas meter is being replaced. Shows.

FIG. 5 is an enlarged cross-sectional view of main parts showing another example of use of the piping structure of the gas meter, showing a state in which the piping joint incorporating the valve device according to the embodiment of the present invention is connected to the outlet pipe of the gas meter.

FIG. 6 is an enlarged cross-sectional view of an essential part showing a usage example in which the valve device according to the embodiment of the present invention is incorporated in an operation lever of a gas stopper.

FIG. 7 is an enlarged cross-sectional view of a main part showing a usage state of the valve device of FIG.

FIG. 8 is an explanatory view of a pipe connection joint incorporating a conventional valve device.

[Explanation of symbols]

(13) (14) ・ ・ ・ ・ Third and fourth connecting cylinders (cylindrical body) (20) ・ ・ ・ ・ ・ Open / close valve (valve body) (30) ・ ・ ・ ・ ・ Switching valve (valve body) (21) ・ ・ ・ ・ ・ Gas supply plug (operating cylinder) (31) ・ ・ ・ ・ ・ Gas pressure inspection plug (operation cylinder part)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Koji Shimizu             1 Stock Association at 18 Hanami Kamitaba, Minami-ku, Kyoto             Inside Fujii Alloy Works F-term (reference) 3H052 AA01 BA32 CA12 CC03 CD09                       EA01                 3H066 AA01 BA31

Claims (5)

[Claims] 1. A valve device comprising a tubular body, a valve body that opens and closes a flow path in the tubular body, and an operating portion that opens and closes the valve body, wherein the valve body is screwed into the tubular body. It is provided such that, by the forward and backward movement in the tubular body due to the screwing, the flow path is set to be opened and closed, and the operating portion is a tubular operating tubular portion, A valve device which is detachably and rotatably provided with respect to the open end of the tubular body, and the valve body is connectable to the operation tubular portion in a relative rotation blocking state. . 2. The valve device according to claim 1, wherein an open end of the tubular body when the operating tubular portion is not attached can be closed by a closing plug. 3. The valve device according to claim 1, wherein the tubular body is provided so as to communicate with a gas main passage extending from an upstream end to a downstream end of the gas pipe joint, and blocks the gas main passage. In this state, when the valve body is opened, either the upstream end or the downstream end of the gas pipe joint communicates with the cylindrical body, and the auxiliary flow path is set to be formed. Valve device. 4. The valve device according to any one of claims 1 to 3, wherein one end of the operating cylinder portion projects outward from an open end of the cylinder body in a state of being attached to the cylinder body. A valve portion having a hole portion into which the insertion shaft is inserted into the relative rotation prevention state, and the insertion shaft projects from the other end. apparatus. 5. The pipe connecting tool according to claim 4,
A valve device in which a portion of the operation tubular portion that projects outward from the tubular body is a plug portion in which a socket for connecting a gas hose is removable.