JPH0148439B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is capable of closing a branch port drilled in a fluid conduit of a water distribution pipe buried underground without stopping the fluid flow. The present invention relates to a method for closing a branch port and a device thereof.

(Conventional Example) For example, a fluid conduit such as a water supply pipe buried underground is connected to another branch conduit, such as a lead-in pipe to each home, to divert the fluid in the original conduit. In order to drill a branch port into the conduit and connect the branch conduit without stopping the flow of fluid in the conduit, the connecting part of the conduit is equipped with:
After installing a valve device that can be opened and closed and connecting a perforation device to this valve device, the valve device is opened, and the cutting blade of the perforation device is passed through the inside of the valve device to perforate a branch port in the conduit, and then, Connection of both conduits is effected by raising the cutting blade, closing the valve arrangement, then removing the perforating arrangement, connecting the required branching conduit to the valve arrangement, and then opening the valve arrangement.

After the branching conduit is no longer needed and removed from the valve device, the valve device is left in the closed state on the outer periphery of the conduit in order to close the branch opening drilled in the conduit. The current situation is that

However, when burying underground gas pipes or electrical conduit pipes, etc., the valve device may be accidentally shocked, causing fluid to leak from the valve device's mounting part. Furthermore, due to aging, the bolts or Fasteners such as nuts may corrode and fluid may leak.

(Object of the Invention) An object of the present invention is to provide a valve device having a valve body that can be opened and closed between a branch port bored in a conduit and a port that is aligned in a straight line with the outer periphery of the conduit in a liquid-tight manner. and a cap of a branch port closing device that holds a core member having a stopper at its tip in a fluid-tight manner to the free end of the opening of the valve device, and the valve device is opened. , by advancing the core material and tightly fitting the stopper at its tip into the branch port, then removing the plug from the core material and then removing the valve device from the pipe, the branch port of the conduit is opened. The purpose is to provide a method for occluding the

Another object of the present invention is to configure the stopper with a bottle having an enlarged diameter head at the tip of the shaft, and an annular body made of a plastically deformable material fitted onto the shaft of the bolt. The enlarged diameter head of the bolt and the distal end surface of the core material pinch the ring body to swell the outer periphery, thereby tightly fitting the plug body,
The object of the present invention is to provide a device capable of closing a branch port of a conduit.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In FIGS. 1 and 2, the fluid conduit 1
is made up of a ductile cast iron pipe 2 with a mortar lining 3 integrally provided on the inner periphery thereof.
A saddle-shaped valve device 6 having a passage 5 in line with the branch port 4 is abutted on the circumferential surface of the conduit 1 where the branch port 4 bored in the pipe 1 is located.

A fork 8a provided at one end of a semicircular band 8 abutting along the circumference of the conduit 1 is engaged with a pin 7 provided on one side of the valve device 6 and parallel to the conduit 1. There is.

The bolt 9, whose other end of the band 8 is locked to the arm of the base, passes through a protrusion 11 provided on the side of the valve device 6 opposite to the pin 7, and is screwed into the bolt 9. By tightening the mating nut 12, the valve device 6 is mounted in a fluid-tight manner on the conduit 1.

A valve body 14 that is opened and closed by a handle 13 shown in FIG. 2 is provided in the middle of the opening 5 of the valve device 6.

A mouthpiece 16 of a branch port closing device 15 is attached to the free end of the port 5 in the valve device 6 in a fluid-tight manner. A case 18 is screwed into the hollow feed screw 17 of the branch port closing device 15, and the case 18 is raised and lowered by manually rotating a handle 19 fixed to the outer periphery of the case 18. .

The upper part of the core material 23 is screwed onto the lower end of the spindle 22, to which the collar 20 is fixed and prevented from coming off, and which is loosely fitted into the feed screw 17 and rotated by the ratchet spanner 21. It is fitted and fixed.

As shown in FIG. 3, on the lower end surface of the core material 23,
A screw hole 24 is bored, and a press tube 25 is rotatably attached to the lower circumferential surface of the core member 23 and secured with an O-ring 25a.

The plug body 26 attached to the lower end of the core material 23 includes a bolt 29 having a tapered enlarged diameter portion 28 at the tip of a shaft portion 27 that is screwed into the lower end of the core material 23, and a shaft portion of this bolt 29. 27 and a plastically deformable ring body 31 which is fitted onto the outside of the ring body 27.

At the free end of the port 5 in the valve device 6, or of the further lateral port 6a (see FIG. 2), there is usually either another conduit or a closure cap (not shown).
are connected, and the fluid in the conduit 1 is branched to another conduit via the valve device 6 in the open state.
When this branched conduit is not used, the valve device 6 is closed and the unnecessary conduit is removed.
Next, a branch port closing device 15 is attached to the free end of the opening 5 of the valve device 6. Note that a cap for closing is attached to the opening 6a.

The valve device 6 equipped with the branch port closing device 15 is
The handle 13 is operated to open the valve, and when the handle 19 is operated in this state, the core member 23 advances and the stopper 26 is inserted into the branch port 4 of the conduit 1, so that the end face of the push tube 25 is opened. , it stops in a state where it is in contact with the circumferential surface of the conduit 1.

In this state, operate the ratchet spanner 21 to rotate the core member 23, and while the shaft portion 27 of the bolt 29 enters inside, the ring body 31 is sandwiched between the enlarged diameter portion 28 of the bolt 29 and the end face of the push tube 25. When pressed, ring body 3
The outer periphery of the free end of the ring 31 is inflated as shown in FIG.

Next, by adjusting and rotating the ratchet spanner 21 and the handle 19 counterclockwise when viewed from above, the lower end of the core member 23 is moved upward in FIG. 1 while being disengaged from the bolt 29. After moving the pressure pipe 25 upward from the position of the valve body 14, the handle 13 is operated to close the valve device 6, and then the bolt 9 and the nut 12 are unfastened to close the valve device 6.
is removed from conduit 1.

As shown in FIG. 5, the bolt 29 of the conduit 1 is tightened with the nut 33 through the washer 32, so that the plug body 26 is firmly attached to the conduit 1 and the branch port 4 is closed. .

Note that after the branch port 4 is closed, the bolt 2
9. If the nut 33, washer 32, etc. are covered with an insulating tape (not shown) to prevent corrosion thereof, the branch port 4 can be more reliably closed.

(Effects of the Invention) As described above, according to the present invention, a valve device including a valve body that can be opened and closed is provided between a branch port bored in a conduit and a passage aligned in a straight line. A base of a branch port closing device that is fluid-tightly mounted on the outer periphery and holds a core member having a stopper at its tip in a fluid-tight manner and that holds a core material having a plug at its tip in a fluid-tight manner, and the valve device After opening the valve, advance the core material,
By tightly fitting the stopper at the tip into the branch port, then removing the stopper from the core material, and then removing the valve device from the conduit, the flow of fluid flowing through the conduit is not stopped. , the branch port drilled in the outer wall of the conduit can be quickly and reliably closed, and after the branch port is closed,
When burying gas pipes, electric conduit pipes, etc. near conduits, it is possible to prevent accidents such as work tools colliding with valve devices and fluid leaking from branch ports.
Furthermore, leakage of fluid due to corrosion of the fixing member of the valve device to the conduit can also be prevented.

Furthermore, according to the present invention, the stopper for closing the branch port of the conduit is formed by a bolt having an enlarged diameter head at the tip of the shaft, and a ring made of a plastically deformable material fitted onto the shaft of the bolt. The enlarged diameter head of the bolt and the distal end surface of the core material clamp and inflate the annular body to tightly fit the plug body into the branch port, so that the plug body is removed from the conduit. It becomes possible to reliably close the branch port without coming off.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the device of the present invention, and FIG. 2 is a longitudinal sectional front view of a device for closing a branch port on the peripheral wall of a fluid conduit, and FIG. 2 is a view taken along line A--A in FIG. FIG. 3 is a front view of the stopper, and FIGS. 4 and 5 are operational views of FIG. 3. DESCRIPTION OF SYMBOLS 1... Conduit, 2... Ductile cast iron pipe, 3... Mortar lining, 4... Branch port, 5... Port, 6... Valve device, 7... Pin, 8... Band, 9... Bolt, 11...
Projection, 12... Nut, 13... Handle, 14... Valve body, 15... Branch port closing device, 16... Base, 17...
Feed screw, 18...Case, 19...Handle, 20
... Collar, 21 ... Ratchet spanner, 22 ... Spindle, 23 ... Core material, 24 ... Screw hole, 25 ... Press tube, 26 ... Plug body, 27 ... Shaft part, 28 ... Expanded diameter part, 2
9... Bolt, 31... Ring body, 32... Washer, 33... Nut.

Claims (1)

[Claims] 1. A valve device having an openable and closable valve body is fluid-tightly attached to the outer periphery of the conduit between the outlet that is aligned with the branch port bored in the conduit, and A core member having a stopper at its tip is attached to the free end of the opening in the valve device in a fluid-tight manner with a mouthpiece of a branch port closing device that holds the core member so as to be freely advanced and retractable, and after opening the valve device, the core member is In the peripheral wall of a fluid conduit, the valve device is advanced, the plug at the tip thereof is tightly fitted into the branch port, the plug is removed from the core material, and the valve device is then removed from the conduit. How to close the branch opening. 2 A valve device equipped with an openable and closable valve body is fluid-tightly attached to the outer periphery of the conduit between the outlet that is aligned with the branch port drilled in the conduit, and the outlet in the valve device A cap of a branch port closing device that holds a core member having a stopper at its tip so that it can move forward and backward is fluid-tightly attached to the free end of the valve, and after opening the valve device, the core member is advanced and its A device for closing a branch port of a conduit by tightly fitting a plug at the tip into the branch port, then removing the plug from the core material, and then removing the valve device from the pipe, the plug body comprises a bolt with an enlarged diameter head at the tip of the shaft, and an annular body made of a plastically deformable material fitted onto the shaft of the bolt, and the diameter enlarged head of the bolt and the core 1. A device for closing a branch port in a peripheral wall of a fluid conduit, characterized in that the annular body is clamped by the distal end surface of the material to inflate the outer periphery so that the stopper is tightly fitted into the branch port.