JP3658161B2 - Water pipe stopcock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water faucet for a water pipe that is used at the time of construction, such as replacement or expansion of an existing water pipe, and can be easily stopped partially without accompanying wide-area water shutoff by a water control valve.
[0002]
[Prior art]
Conventionally, when constructing this type of water pipe, first, the water control valves at existing locations of the existing water pipe are tightened to shut off water over a wide area, and then the water pipe is replaced or expanded within a predetermined time. Normally, when the construction is completed, the water control valve is opened to allow water to flow.
However, according to such an enforcement method, there are inevitably inconveniences such as red water and muddy water at the time of restoration in a wide area, and factories that require a large amount of water, including ordinary households in that area. This will result in a great deal of trouble for hospitals.
[0003]
In order to solve such problems, a hard hole having a shape in which a through hole having a diameter slightly smaller than the inner diameter is formed on the upper surface of the water pipe and the inner diameter of the water pipe is substantially closed by inserting the through hole. After inserting the valve body made of rubber, the outer periphery of the valve body is bulged outward by pressing the valve body from above, and the outer part of the valve body is brought into close contact with the inner surface of the water pipe, thereby completely sealing the water pipe A construction method has been developed that uses a water stop valve that does not involve extensive water shutoff by using a water control valve.
[0004]
[Problems to be solved by the invention]
However, in such a water tap of a conventional water pipe, the valve body itself is molded of hard rubber so that it can withstand water pressure up to 7 kgf / cm 2 (0.7 MPa). Therefore, a very large force is required to deform the outer surface of the valve body by pressing it from the top until it is in close contact with the inner surface of the water pipe. There was also a risk of damage.
[0005]
In addition, the inner surface of the water pipe, for example, in the case of a cast pipe, has a rugged surface formed by attaching red rust containing iron to the rugged surface. It was difficult to deform so as to become familiar. Therefore, even if the valve body is strongly pressed against the inner surface of the water pipe, water leakage may occur when the water stops, and red water may be released when the valve body is pressed and red water may be generated when water is restored after restoration. there were.
This invention is made | formed in view of said point, and it aims at providing the water stop cock of the water pipe which can stop water completely, without requiring strong pressing force.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention inserts an elastic valve body into a through-hole drilled in the upper surface of a water pipe embedded substantially horizontally, and presses the valve body outward from above. In the water tap of a water pipe that is bulged to be in close contact with the inner surface of the water pipe, the valve body is configured as follows.
That is, a groove having a slit-like shape is formed in the lower half of the spherical surface along the longitudinal direction, leaving a pair of side wall portions on both sides, and the inner periphery of the longitudinal direction is formed along the through hole. A substantially cylindrical outer cylinder made of cast steel with protruding parts ,
Upper half is slidably loosely inserted in the inner diameter portion provided in the upper half of the outer tube, in cross-section oval deleting the sides so as to face the groove of the upper Symbol outer tube in the lower half An inner cylinder made of cast steel with a bottom surface formed with a spherical shaft,
A soft rubber seal member that fills the gap between the shaft portion of the inner cylinder and the groove portion of the outer cylinder, and is molded to protrude from the groove portion so as to fill the gap between the inner surface of the water pipe and the outer cylinder; Consists of.
Then, through the sealing member has been elastically integrally the inner and the outer tube, the upper Kibentai while inserted into the water pipe from the hole, the top of the upper Symbol inner cylinder by pressing, the shaft portion and the side portions pressurizes the upper Symbol seal member that is held between the side wall of the outer tube is bulged outwardly, brought into close contact with the inner surface of the upper Symbol water pipe stop It is designed to be in a water state .
[0007]
The water faucet of the water pipe according to the present invention is configured as described above, and when the valve body is inserted from the through hole of the water pipe and the inner cylinder is pushed down from above, both sides are sandwiched between the side walls of the outer cylinder. The restricted sealing member is pressurized by the shaft portion of the inner cylinder , bulges outward so as to fill the gap between the outer cylinder and the inner surface of the water pipe, and is in close contact with the inner surface of the water pipe to stop water.
[0008]
At this time, since the sealing member is made of soft rubber, it can be brought into close contact with the inner surface of the water pipe simply by pressing lightly, workability at the time of construction is remarkably improved, and there is no fear of breakage even in the case of an asbestos pipe. The seal member is sandwiched between the side walls on both sides of the groove portion of the strong outer tube made of cast steel except for a part of the peripheral portion, and the shaft portion of the strong inner tube made of cast steel is embedded inside. Therefore, it can sufficiently withstand strong water pressure.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below with reference to the drawings.
1 is a cross-sectional view showing an embodiment of the present invention inserted into a water pipe, FIG. 2 is a cross-sectional view showing only a valve body along the line AA in FIG. 1, and FIG. FIG. 4 is a plan view thereof, and FIG. 5 is an explanatory diagram showing a relationship between the inner cylinder, a screw shaft for driving the inner cylinder, and a nut.
[0010]
First, an outline of an embodiment of the present invention will be described with reference to FIG.
At the required position of the water pipe 1 buried almost horizontally, the upper half 2a and the lower half 2b of the split split T-shaped pipe 2 consisting of a pair of upper and lower parts are removed with bolts 4 and nuts 5 through the 0 ring 3. Attach to the flanged branch pipe 2c of the upper half 2a through a well-known water stop valve (both not shown) and attach to the upper surface of the water pipe 1 slightly from its inner diameter. A through hole 1a having a small diameter (for example, about 96 mm when the inner diameter of the water pipe 1 is 100 mm) is formed.
[0011]
When the drilling of the through-hole 1a is finished, the continuous water drilling machine is removed, and a bell-shaped valve lid 7 is attached to the flange portion 2d of the branch pipe 2c with the flange of the split T-shaped pipe 2 via the 0-ring 6. A valve body 10 is attached to the valve lid 7.
[0012]
The valve body 10 includes a substantially cylindrical outer cylinder 11 made of cast steel having high strength, an inner cylinder 12 made of cast steel slidably inserted into the inner diameter portion 11b of the outer cylinder 11, the outer cylinder 11 and the inner cylinder. filled the gap between the 12, further consisting in overhangs the outer tube 11 and the water pipe 1 of the inner surface is molded into a shape to fill the the soft rubber sealing member 13. external. The inner cylinder 12 moves up and down by a screw shaft 14 rotatably mounted on the valve lid 7.
[0013]
The outer cylinder 11 is formed in a substantially cylindrical shape whose outer diameter can be inserted through the through hole 1a of the water pipe 1, leaving a slight gap when inserted into the through hole 1a on the outer peripheral surface in the longitudinal direction. A flange portion 11a having a shape along the through hole 1a is projected and an inner diameter portion 11b is provided in the upper half portion. In the lower half of the outer cylinder 11, a pair of side walls 11c and 11c are formed on both sides to form a groove 11d, and the lower surface of the outer cylinder 11 is along the inner peripheral surface of the water pipe 1 leaving a slight gap. It has a spherical shape.
[0014]
The inner cylinder 12 has an upper half 12a that is slidably loosely fitted to the inner diameter part 11b of the outer cylinder 11, and a lower half of the inner cylinder 12 that is oval in cross section and has a spherical bottom surface 12b. A central hole 12c is formed in the central portion of the inner cylinder 12 leaving a lower end portion. Further, as shown in FIGS. 4 and 5, two large and small through holes 12d and 12e are provided on the side wall surface of the upper half portion 12a of the inner cylinder 12, and the through holes 12d and 12e are inserted therethrough. Then, the nut 15 is mounted so as not to be relatively rotatable.
[0015]
The inner cylinder 12 fitted with the nut 15 is inserted into the inner diameter part 11b of the outer cylinder 11, and temporarily fastened with the respective upper end parts being almost equal in height as shown in FIG. Soft rubber is injected to fill the gap between the groove portion 11d of the outer cylinder 11 and the shaft portion 12b of the inner cylinder 12, and from the groove portion 11d so as to substantially fill the gap between the outer cylinder 11 and the inner surface of the water pipe 1. A seal member 13 having a bulging portion projecting in the direction is formed, and the inner and outer cylinders 12 and 11 are integrally mounted through the seal member 13.
[0016]
Further, a screw shaft 14 is mounted on the valve lid 7 so as to be rotatable and non-slidable in the longitudinal direction, and a tip portion thereof is screwed into the nut 15 to connect the valve body 10 and the valve lid 7 with the screw shaft 14 and the nut. 15 is integrated.
[0017]
Next, the operation of the water stop cock configured as described above will be described with reference to FIGS. 6 and 7 in addition to FIG.
With the valve body 10 moved to the uppermost portion indicated by the phantom line in FIG. 1, the valve lid 7 is fixed in a sealed state to the flange portion 2d of the split T-tube 2 via the 0 ring 6 and screwed from the outside. The shaft 14 is rotated in the screwing direction to lower the nut 15, and the valve body 10 integrated with the nut 15 is inserted into the water pipe 1 through the through hole 1 a, as shown in FIGS. 1 and 6. The lower end portion of the seal member 13 is brought into contact with the inner surface of the water pipe 1, and the flange portion 11a of the outer cylinder 11 is pressed against the peripheral portion of the through hole 1a through the seal member for sealing.
[0018]
When the screw shaft 14 is further rotated in the same direction from this state, the nut 15 presses the inner cylinder 12 further downward, and the shaft portion 12b is held by the side wall portions 11c and 11c on both sides. Is bulged outward until it is in close contact with the entire inner surface of the water pipe 1, and the water-stopping state shown in FIG.
At this time, a maximum water pressure of about 7 kgf / cm 2 acts on the seal member 13 to be pushed and bent in the flow direction (the arrow X direction in FIG. 1). However, the seal member 13 excludes its peripheral portion. Most of the pipes are sandwiched between the pair of side wall parts 11c, 11c of the strong cast steel outer cylinder 11 , and the shaft part 12b of the cast steel inner cylinder 12 is embedded in the center. There is no possibility of water leakage due to the close contact with the inner surface.
[0019]
And since the sealing member 13 of this valve body 10 consists of soft rubber, the force which presses the valve body 10 from upper direction may be small, workability | operativity is very favorable, and it is a comparatively weak water supply like an asbestos pipe. There is no risk of damage even in the case of tubes. Further, even when foreign matter such as red rust adheres to the inner surface like a cast pipe, the seal member 13 is easily deformed along the uneven surface to prevent water leakage, and at the same time, the seal member Since 13 does not damage the inner surface of the water pipe 1, there is no risk of red water generation.
[0020]
Further, after completion of construction such as water pipe replacement or expansion, when the screw shaft 14 is rotated in the screwing direction and the pressing of the inner cylinder 12 by the nut 15 is released, the seal member 13 is brought into FIG. 6 by its own restoring force. Since it returns to the state shown, the seal member 13 can be easily removed from the water pipe 1 by further rotating the screw shaft 14 in the same direction.
[0021]
[0022]
【The invention's effect】
As described above, the water tap of the water pipe according to the present invention includes a strong inner and outer cylinder made of cast steel and a soft rubber molded so that the inner and outer cylinders are integrated into a valve body inserted into the water pipe. It is made up of a sealing member that receives the strong water pressure of the water pipe with a strong inner and outer cylinder, and it is made to adhere to the inner surface of the water pipe with a soft sealing member. It can be realized and its configuration is simple and can be supplied at low cost.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of the present invention inserted into a water pipe.
2 is a cross-sectional view showing only the valve body along the line AA in FIG.
FIG. 3 is also a bottom view of the valve body.
FIG. 4 is a plan view of the valve body.
FIG. 5 is also an explanatory view showing the relationship between the inner cylinder and the screw shaft and nut for driving the inner cylinder.
FIG. 6 is an explanatory view showing a state where the valve body is also inserted into a water pipe.
FIG. 7 is an explanatory view showing a state where the valve body is also pressed.
[Explanation of symbols]
1: Water pipe 2: Split T-shaped pipe 7: Valve lid 10: Valve body 11: Outer cylinder 11c: Side wall part 11d: Groove part 12: Inner cylinder 12a: Upper half part 12b: Shaft part 13: Seal member 14: Screw shaft 15: Nut

Claims (1)

By pressing from above by inserting the valve body (10) having elasticity in holes (1a) which is formed in the upper surface of the substantially horizontally buried water pipe (1), said valve body (10) outside In the water tap of the water pipe which bulges in the direction and is brought into close contact with the inner surface of the water pipe (1) ,
The valve body (10)
A slit-shaped groove portion (11d) is formed in the lower half of the spherical surface along the longitudinal direction, leaving a pair of side wall portions (11c, 11c) on both sides, and the transparent portion is formed on the middle outer peripheral surface in the longitudinal direction. A substantially cylindrical outer cylinder (11) made of cast steel with a flange (11a) protruding along the hole (1a) ;
Half upper (12a) is the outer tube slidably loosely inserted in the inner diameter portion provided in the upper half of the (11) (11b), the outer cylinder in the lower half (11) of the groove (11d) An inner cylinder (12) made of cast steel in which a shaft portion (12b) having a spherical bottom surface is formed with a cross-sectional oval shape in which both side portions are removed so as to face each other,
The gap between the shaft (12b ) of the inner cylinder (12) and the groove (11d) of the outer cylinder (11) is filled, and the gap between the inner surface of the water pipe (1) and the outer cylinder (11). And a soft rubber seal member (13) molded from the groove (11d) so as to fill
The outer cylinder (11) and the inner cylinder (12) are integrally mounted via the seal member (13),
In the state where the valve body (10) is inserted into the water pipe (1 ) from the through hole (1a) , the upper portion of the inner cylinder (12) is pushed down so that the shaft portion (12b) side wall portion of the section the outer cylinder (11) (11c, 11c) wherein is sandwiched by the seal member (13) pressurizes the swelled outwardly, in close contact with the inner surface of the water pipe (1) A water pipe stop cock characterized by being in a water stop state .

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