JP2003343778A - Gas cock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas cock having such form that a pipe 3 is connected with one end of a gas flow passage 23 opened and closed by a cock body 2 stored turnably and a gas fittings connection joint 15 capable of being screw- fitted in and connected with a gas take-in cylindrical part 40 provided protrudedly in gas fittings 4 is turnably mounted at the other end thereof and capable of being easily connected with the pipe 3 or the gas take-in cylindrical part 40 irrespective of direction of extension of the pipe 3 and an installation position of the gas fittings 4. <P>SOLUTION: A flow passage change-over joint 1 which is a bending cylindrical body bent by a predetermined angle at a predetermined position is air-tightly connected with at least one end among both ends of the gas flow passage 23 so as to prevent its coming off and allow relative turn. The pipe 3 or the gas fittings connection joint 15 is connected through the flow passage change-over joint 1. <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 gas plug of a type in which a gas pipe is connected to one end of a gas flow path and the other end is connected to a gas appliance through an appliance connection joint.

[0002]

2. Description of the Related Art As a conventional gas plug (G) of the type which is directly connected to a gas appliance, there is, for example, one shown in FIG. This is a plug housing part (20) in which the plug body (2) is housed, and the plug housing part (20) located on the upstream side (right side in the drawing).
From the gas inflow cylinder part (21) communicating with the plug accommodating part (20) and the gas outflow cylinder part (22) located on the downstream side (left side in the drawing) of the plug accommodating part (20) and communicating with the plug accommodating part (20). The stopper main body is configured, and the gas outflow tube portion (2
Up to the downstream end of 2), the gas channel (23) is formed coaxially, and the gas channel (23) is formed by rotating the stopper body (2) in the stopper accommodating portion (20). It can be opened and closed freely.

A flexible pipe (3) is connected to the gas inflow cylinder portion (21) through a pipe joint (11) as shown by a chain double-dashed line in the figure. An instrument connection joint (15) is connected to the gas outflow tube portion (22) for screw connection to the gas intake tube portion (40) which serves as a gas intake port for introducing gas into the gas appliance (4). It

The instrument connection joint (15) is airtightly and rotatably attached to the downstream end of the gas outflow tube portion (22), and has an inner peripheral surface on which the gas intake tube is connected. A connection screw portion (16) that can be screwed into the portion (40) is formed.

In this conventional gas stopper (G), the instrument connecting joint
Screw the tip of the gas intake tube (40) of the gas appliance (4) to the open end of (15) and rotate the tool connection joint (15) in the tightening direction to rotate the gas intake tube (40). ) Is screwed into the female screw part (16) in the instrument connection joint (15). As a result, the gas stopper (G) is connected to the gas intake tube portion (40) of the gas appliance (4) via the appliance connection joint (15), and the gas from the flexible tube (3) is gasified. Can be fed to the instrument (4).

[0006]

However, in this conventional gas plug (G), the pipe joint (11) has the gas inlet tube (21).
In addition, the appliance connection joint (15) is only linearly connected to the gas outflow tube portion (22), and the gas inflow tube portion is
The angle of the pipe joint (11) with respect to (21) and the angle of the instrument connection joint (15) with respect to the gas outflow tube portion (22) cannot be changed. Therefore, the extension direction of the flexible tube (3) or the gas intake tube (4
Depending on the orientation of 0), it may not be possible to use the gas stopper body of the above type.

For example, when the connecting end of the flexible tube (3) is located below the gas inflow tube (21), the pipe joint (11) is attached to the gas inflow tube (21). It is preferable to adopt a hanging posture, but in that case, the pipe joint (11) linearly connected to the gas inflow cylinder portion (21) is removed, and an L-shaped bending joint (not shown). ) Must be replaced. ， In this way, the pipe joint for the gas inlet tube (21)
If you want to change the posture of (11), you need to prepare a cylinder of another shape separately, so you cannot change it at the installation site and the replacement work is troublesome. The same applies to the relationship between the installation position of the gas appliance (4) and the appliance connection joint (15).

According to the present invention, "a pipe is connected to one end of a gas flow passage opened and closed by a plug that is rotatably accommodated, and the other end has a gas intake protruding from a gas appliance. Gas stopper of a type in which a device connection joint that can be screwed and connected to a tubular portion is rotatably mounted ", regardless of the extension direction of the pipe, the installation position of the gas instrument, or the protruding direction of the gas intake tubular portion. An object of the present invention is to provide a gas plug that can be easily connected to a pipe or a gas intake cylinder.

* 1

[0010]

[Means for Solving the Problems] The solution means of the present invention taken in order to solve the above-mentioned problem is that "at least one of the both ends of the gas flow path is bent at a predetermined position at a predetermined angle. The flow path switching joint which is a cylinder is airtightly connected in a retaining state and relatively rotatable, and the pipe or the instrument connection joint is connected through the flow path switching joint. " is there.

The above means operates as follows. The pipe or instrument connection joint is connected to the gas passage of the gas plug in an airtight and communicating state via the passage switching joint.
Since the flow path switching joint is configured to bend at a predetermined angle at a predetermined position, when the flow path switching joint is rotated with one end of the flow path switching joint in contact with one end of the gas flow path, The angle of the flow passage of the switching joint with respect to the gas flow passage is changed before and after the rotation. In addition, since the switching joint is attached to one end of the gas flow passage in a retaining state, it does not unintentionally separate during rotation,
It is possible to rotate while maintaining one end of the gas flow path and the connection end surface of the flow path switching joint substantially in contact with each other.

* 2 In the above item 1, "the connection end face of the gas flow passage to which the flow passage switching joint is connected is set to be inclined by 45 degrees with respect to the axis of the gas flow passage". In this configuration, by setting the bending angle of the flow path switching joint to 45 degrees, the flow path from the gas flow path to the open end of the flow path switching joint is substantially straight depending on the rotational posture of the flow path switching joint. Can be set in the shape of
The angle of the flow path of the flow path switching joint with respect to the gas flow path can be set to 90 degrees by rotating the flow path by 90 degrees.

* 3 In the above item 1, in the case where "the flow passage switching joint is an L-shaped joint bent at 90 degrees", the connection end faces of the flow passage switching joint and the gas flow passage are By setting so as to be a vertical surface with respect to the flow passage that follows, the flow of the flow passage switching joint with respect to the gas flow passage in the state where the flow passage switching joint is connected to one end of the gas flow passage. The track can be provided at 90 degrees. In this case, the open end of the flow path switching joint can be opened vertically and horizontally by rotating the flow path switching joint by a predetermined angle.

* 4 In each of the above items, "fixing means for fixing the flow path switching joint in a relative rotation preventing state in a state of being rotated by a predetermined angle with respect to the gas flow channel is detachable. In the case of “provided”, the gas flow path and the flow path switching joint are fixed and held in an airtight state and in a state where an angle between them is set to a predetermined angle. If the fixing means is removed,
The flow path switching joint becomes rotatable again.

* 5 In each of the above items, "in which the appliance connection joint is connected to the gas flow path through the flow path switching joint" is located on the gas appliance side downstream of the plug body. There are flow path switching fittings and instrument connection fittings. Therefore, even if an accident occurs such that the airtightness of the connection between the gas flow path and the flow path switching joint or the connection between the flow path switching joint and the instrument connection joint is lost, the plug located on the upstream side thereof Only by closing the body and shutting off the gas flow path, it is possible to reliably prevent gas leakage from the connection part of the flow path switching joint or the instrument connection joint.

[6] In each of the above items, [the first O-ring for air-tight sealing and the first O-ring are provided in the portion where the gas flow passage and the flow passage switching joint are in relative airtight contact with each other so as to be rotatable relative to each other. Also has a second O-ring arranged at a position close to the gas flow passage, and a third O-ring for airtight sealing is provided at a portion where the gas flow passage or the flow passage switching joint and the instrument connection joint are connected. And a fourth O ring located closer to the gas flow path than the third O ring, and the first O ring and the third O ring are made of a heat-resistant material having a large coefficient of thermal expansion. ”
Can be one.

In this structure, the first O-ring located closer to the atmosphere than the second O-ring and the third O-ring located closer to the atmosphere than the fourth O-ring are made of a heat-resistant material having a large coefficient of thermal expansion. When a fire or the like occurs, the first and third O-rings close to the atmosphere expand to further enhance the airtightness of the arrangement portion. Therefore, there is less concern that the airtightness, waterproofness, and ozone resistance of the second and fourth O-rings arranged near the gas flow path will deteriorate.

[0018]

According to the present invention, the angle of the flow passage switching joint with respect to the gas flow passage can be changed by simply rotating the flow passage switching joint while keeping the gas flow passage substantially in contact with the gas flow passage. Therefore, it is not necessary to replace the fitting parts according to the direction of the pipe or the installation position of the gas appliance, and it is possible to easily change the angle of the fitting at the work site according to the direction of the piping or the installation position of the gas appliance. Since it can be carried out quickly, it is possible to provide a convenient gas stopper. Further, since it is not necessary to separately prepare a component for changing the angle with respect to the gas flow path, there is no inconvenience that the stock as a joint unnecessarily increases. Further, since the flow path switching joint is connected to the gas stopper in a state where it does not come off, there is no inconvenience of dropping or losing the joint when rotating.

According to the item (2), the shape of the upstream end or the downstream end of the gas plug provided with the flow path switching joint can be freely changed from linear to L-shaped. On the other hand, it can be made to correspond to a substantially linear line or a gas intake tube portion of a gas appliance located below. Further, in the item (3), the shape of the upstream end or the downstream end of the gas plug provided with the flow path connecting joint can be set to a substantially L shape, and the gas plug can be extended from the upper, lower, left and right sides with respect to the gas flow path. It can be adapted to the incoming pipe or the gas intake cylinder.

Further, in the item (4), since it is possible to fix the flow path switching joint with respect to the gas flow path in a state where the changed posture is maintained, the flow path can be fixed with the pipe connected. The path switching joint does not wobble, and it is possible to connect the pipes in a stable posture.

As described above, in the item (5), there is an accident such that the airtightness of the connection between the gas flow path and the flow path switching joint or the connection between the flow path switching joint and the appliance connection joint is lost. Even if it occurs, only by closing the plug provided in the gas flow path, it is possible to reliably prevent gas leakage from the connection part of the flow path switching joint or the instrument connection joint.

According to the sixth aspect, even if a fire or the like occurs, the airtightness and waterproofness of the second and fourth O-rings, which are arranged closer to the gas passage than the first and third O-rings, There is less concern that ozone resistance will decrease.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
It will be described with reference to the drawings. What is shown in FIG. 1 and FIG.
FIG. 3 is a cross-sectional view of the gas plug according to the first embodiment of the present invention, in which the structure itself of the gas plug is the same as that of the conventional one.
(2) is a configuration in which the gas inflow cylinder part (21) and the gas outflow cylinder part (22) are provided coaxially so as to communicate with the plug accommodating part (20) rotatably accommodated, The operation handle (25) connected above the stopper body (2) is operated to move the stopper body (2) into the stopper housing (2
It is possible to employ one that can connect or block the gas flow path (23) from the gas inflow cylinder part (21) to the gas outflow cylinder part (22) by rotating in the (0). In addition, the gas outflow tube part (22) has a gas intake tube part for gas intake of the gas appliance (4).
An instrument connection joint (15) for screwing connection to the (40) is fitted and mounted rotatably in an airtight state. In addition, a third O-ring (37) made of heat-resistant expansion rubber as a heat-resistant material having a large coefficient of thermal expansion is fitted and fitted into the third annular groove (47) formed on the outer periphery of the gas outlet cylinder (22). The fourth O-ring (38) made of rubber is fitted in the fourth annular groove (48) formed closer to the gas flow path (23) than the third annular groove (47). It is installed. Then, the third and fourth O-rings (3
7) and (38) ensure the airtightness of the installation portion of the instrument connection joint (15).

On the open end side of the gas inlet tube portion (21) of this embodiment, a bent tube portion (24) inclined downward about 45 degrees with respect to the axis of the gas flow channel (23) is extendedly formed. The flow-path switching joint (1) is connected to the bent tubular portion (24), and the flow-path switching joint (1) is further flexible from an outdoor unit (not shown). The pipe (3) will be connected via the pipe joint (11).

In the flow path switching joint (1), the insertion tube portion (10) inserted into the bending tube portion (24) is connected to the connection tube portion (12) to which the flexible tube (3) is connected. And is tilted at 45 degrees to form a bent tubular shape as a whole.
By inserting (1) into the bent tubular portion (24) in the posture shown in FIG. 1, the connecting tubular portion (12) can be hung with respect to the gas flow path (23) and will extend from below. It can be adapted to the flexible tube (3).

A C-shaped ring (13) is fitted on the insertion tube portion (10) to keep the flow path switching joint (1) from the gas inflow tube portion (21). Will function as a retaining means.

In order to correspond to the flexible tube (3) extending horizontally toward the gas plug, as shown in FIG.
The flow path switching joint (1) is rotated 180 degrees from the posture shown in FIG. As a result, the flow path of the flow path switching joint (1) and the gas flow path (2
3) and a substantially linear continuous form, the gas inflow cylinder (2
The flow path switching joint (1) can be extended substantially coaxially from the open end of (1).

The first annular groove (45) formed on the outer periphery of the insertion tube portion (10) has a first O-ring made of heat resistant expansion rubber (heat resistant material having a large coefficient of thermal expansion). 35) is fitted and mounted, and the gas flow path (2
A second O-ring (36) made of rubber is fitted and mounted in the second annular groove (46) formed at a position close to 3). And
The first and second O-rings (35) and (36) ensure the airtightness of the passage switching joint (1). Therefore, in the gas plug according to the present embodiment, the first and third O-rings (35) (37) located on the atmosphere side with respect to the second and fourth O-rings (36) (38) are heat resistant with a large coefficient of thermal expansion. Since it is made of heat-resistant expansive rubber, which is a conductive material, the first and third O-rings (35) (37) close to the atmosphere expand when a fire or the like occurs, and the airtightness of the installation part is further enhanced. . Therefore, the 2nd and 4th O-rings (36) (38)
Airtightness, waterproofness, and ozone resistance are less likely to deteriorate.

In this embodiment, when the flow path switching joint (1) is inserted into the bending tube portion (24), the end of the bending tube portion (24) and the flow path switching joint (1 ), The holes (14) are formed at 90 degree intervals, and the holes are
A ring body (17) having four screw holes corresponding to (14) is fitted on the boundary line. Then, after rotating the flow path switching joint (1) so that the angle of the flow path switching joint (1) with respect to the gas inflow cylinder portion (21) becomes a predetermined angle, the bolt
(18) is screwed into the screw hole of the ring body (17),
Insert into the hole (14). As a result, the flow path switching joint (1) does not rotate carelessly,
The posture of the flow path switching joint (1) with respect to (21) is fixed. That is, the hole portion (14), the ring body (17) and the bolt (18) function as relative rotation preventing means of the flow path switching joint (1).

FIG. 3 is a sectional view showing a state in which the flow path switching joint (1) is connected to the gas plug according to the second embodiment. Flow path switching joint adopted in this embodiment
(1) is an L-shaped bent tube in which the insertion tube part (10) is bent at 90 degrees with respect to the connection tube part (12), and is provided at the open end of the gas inflow tube part (21) that opens in the horizontal direction. By inserting the insertion tube part (10) into the retaining state, the angle of the connection tube part (12) of the flow path switching joint (1) with respect to the gas flow path (23) can be set to 90 degrees. .

From the state of FIG. 3, a 180 degree flow path switching joint
When the (1) is rotated, as shown by the chain double-dashed line in the figure, the flow path switching joint (1) is provided with the connecting tubular portion (12) that opens upward.
Therefore, it is possible to equip the flow path switching joint (1) which opens to the left and right sides by rotating 90 degrees. Therefore, in this case, the flexible tube (3) can be used when it extends from the vertical direction or the horizontal direction with respect to the gas plug.

The outer surface including the boundary portion between the gas inflow tube portion (21) and the insertion tube portion (10) of the flow path switching joint (1) of this embodiment has four circumferentially spaced 90 ° intervals. An annular body (19) having a groove portion (26) and a ridge (29) slidable in the groove portion (26) in the longitudinal direction on the inner peripheral surface thereof is prepared.
When disconnecting or turning the flow path switching joint (1), the annular body (1
9) is moved to the gas inflow cylinder part (21) side and made to stand by,
Insert the insertion tube part (10) of the flow path switching joint (1) and rotate the flow path switching joint (1) to fix it at a predetermined angle. ) Slide the annular body
(19) may be moved so as to cover the boundary portion.

In the above embodiment, since the groove portions (26) are provided at intervals of 90 degrees, the attitude of the flow path switching joint (1) with respect to the gas inflow cylinder portion (21) is also set every 90 degrees. The Rukoto. The ridges (29) provided in the groove (26) and the annular body (19)
Depending on the number of
The angle of (1) can be finely adjusted.

FIGS. 4 and 5 are sectional views showing the third embodiment, in which the flow path switching joint (1) is connected to the gas outlet cylinder (22) side. It is configured.

On the open end side of the gas outflow tube portion (22) of this embodiment, a bent tube portion (27) inclined by about 45 degrees with respect to the axis of the gas flow channel (23) is extendedly formed. The insertion tube portion (10) of the flow path switching joint (1) is inserted and connected to the bent tube portion (27) in a retaining state.

On the outer periphery of the insertion tube portion (10), as in the previously described first embodiment, the first O made of heat resistant expansion rubber is used.
A ring (35) and a second O-ring (36) mounted near the gas flow path (23) are attached to the ring (35).

The other second gas outflow tube portion (28) of the flow path switching joint (1) is constructed such that the instrument connection joint (15) is rotatably connected thereto, and the instrument connection joint (15) ), The gas intake tube portion (40) protruding from the gas appliance (4) is connected. Further, on the outer periphery of the second gas outflow cylinder portion (28),
A third O-ring (37) made of heat-resistant expansion rubber is fitted and attached, and a fourth O-ring (38) made of rubber is fitted at a position closer to the gas flow path (23) than the third O-ring (37). The third and fourth O-rings (37) and (38) and the above-described first and second O-rings (35) and (36) are the same as those described in the first embodiment. It has the function of.

In the flow path switching joint (1), the insertion tube portion (10) to the bending tube portion (27) is connected to the device connection joint (15).
The bent tube portion (22) is formed in a bent tube shape inclined by 45 degrees with respect to the gas outlet tube portion (28), and the flow path switching joint (1) is arranged in the posture shown in FIG. By inserting the second gas outflow tube portion (28) of the flow path switching joint (1) with respect to the gas flow path (23), the flow path of the second gas outflow tube portion (28) can be in a hanging posture.
In this case, it is possible to correspond to the gas intake tube portion (40) located below. Further, if the flow path switching joint (1) is rotated 180 degrees from the posture shown in FIG. 4, it can be switched to the posture shown in FIG.

In the gas plug according to the third embodiment, the flow path switching joint (1) and the instrument connection joint (15) are both the plug body (2).
It will be located downstream of the gas appliance (4). Therefore, even if an accident occurs that the airtightness of the connection part of the flow path switching joint (1) and the connection part with the instrument connection joint (15) is lost,
Only by closing the plug body (2), it is possible to reliably prevent gas leakage from the connection part of the flow path switching joint (1) and the instrument connection joint (15).

The gas plug of each of the above-mentioned embodiments is a gas plug in which the gas inflow cylinder portion (21) and the gas outflow cylinder portion (22) are coaxially located. As described above, the flow path from the gas inflow tube portion (21) to the gas outflow tube portion (22) can be connected to a Z-shaped gas plug.

FIG. 6 shows a gas inlet tube (21) of the gas plug.
Is connected to the flow path switching joint (1) having an L-shaped bent tubular shape, and the gas outlet tubular portion (22) is connected to the gas appliance (4) via the appliance connecting joint (15). It shall be connected to the gas intake tube (40). In this case, when the flow path switching joint (1) is rotated with respect to the gas inflow tube portion (21), the connecting tube portion (12) to which the flexible tube (3) is connected becomes the gas inflow tube portion ( It will rotate in the circumferential direction around the axis of (21), and depending on the extension direction of the flexible tube (3), change the orientation of the connecting tubular part (12) of the flow path switching joint (1) with respect to the gas plug. It can be changed to a predetermined orientation.

FIG. 7 shows the gas outlet cylinder of the gas plug.
A flow path switching joint (1) configured in an L-shaped bent tube shape is connected to (22), and a flexible tube is attached to the gas inflow tube section (21).
(3) is connected. The flow path switching joint (1)
The instrument connection joint (15) is rotatably connected to,
The gas intake tube portion (40) of the gas appliance (4) is connected through the appliance connection joint (15). In this case, when the flow path switching joint (1) is rotated with respect to the gas outflow cylinder portion (22),
The appliance connection joint (15) will rotate in the circumferential direction around the gas outflow tube portion (22), and will be at the installation position of the gas appliance (4) or the protruding position of the gas intake tube portion (40). Accordingly, the orientation of the instrument connection joint (15) with respect to the gas plug can be changed to a predetermined direction.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a flow path switching joint (1) is connected to a gas plug according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which the flow path switching joint (1) is rotated 180 degrees from the state of FIG.

FIG. 3 is a cross-sectional view showing a state in which a flow path switching joint (1) is connected to the gas plug according to the second embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a state in which a flow path switching joint (1) is connected to a gas plug according to a third embodiment of the present invention.

5 is a cross-sectional view showing a state in which the flow path switching joint (1) is rotated 180 degrees from the state of FIG.

FIG. 6 is an explanatory view showing a state in which the flow path switching joint (1) is connected to the gas plug according to the fourth embodiment of the present invention.

FIG. 7 is an explanatory diagram showing another example of the fourth embodiment of the present invention.

FIG. 8 is a cross-sectional view showing an example of a conventional gas plug connection mode.

[Explanation of symbols]

(1) ・ ・ ・ Flow path switching joint (2) ・ ・ ・ Stopper (23) ・ ・ ・ Gas flow path (40) ・ ・ ・ Gas intake cylinder

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3H016 EA02                 3H051 AA05 BB02 BB03 BB10 CC15                       FF01                 3H104 JA02 JB01 JC08 JD09 LF16

Claims (6)

[Claims] 1. A pipe is connected to one end of a gas flow path opened and closed by a plug that is rotatably accommodated, and the other end is connected to a gas intake tube portion projecting from a gas appliance. In a gas plug of a type in which a device connection joint capable of screw connection is rotatably mounted, at least one end of the both ends of the gas flow path is a bent cylindrical body bent at a predetermined position at a predetermined angle. A gas tap, characterized in that the passage switching joint is airtightly connected in a retaining state so as to be relatively rotatable, and the pipe or the instrument connection joint is connected via the flow passage switching joint. 2. The gas plug according to claim 1, wherein a connection end face of the gas flow passage to which the flow passage switching joint is connected is
A gas plug set to be inclined at 45 degrees with respect to the axis of the gas flow path. 3. The gas plug according to claim 1, wherein the flow path switching joint is an L-shaped joint bent at 90 degrees. 4. The gas plug according to any one of claims 1 to 3, wherein the flow passage switching joint is fixed in a relative rotation preventing state while being rotated by a predetermined angle with respect to the gas flow passage. A gas plug with a fixing means for detachably mounting. 5. The gas plug according to claim 1, wherein the instrument connection joint is connected to the gas flow passage via the flow passage switching joint. 6. The gas plug according to any one of claims 1 to 5, wherein a portion for airtightly contacting the gas flow passage and the flow passage switching joint in a relatively rotatable manner is provided with a first portion for airtight sealing. The 1O ring and the second O located closer to the gas flow path than the first O ring
A ring is provided, and in the portion connecting the gas flow path or the flow path switching joint and the instrument connection joint, a third O ring for airtight sealing and the gas flow channel rather than the third O ring. Position 4 near
An O-ring is provided, and the first O-ring and the third O-ring are gas stoppers made of a heat-resistant material having a large coefficient of thermal expansion.