JPH0781664B2 - Method and apparatus for removing uninterrupted water from a branch plug - Google Patents

Description

Detailed Description of the Invention a. OBJECT OF THE INVENTION [Industrial field of application] The present invention provides a branch plug installed in a fluid pipeline in a water-free state (in which the flow in the fluid pipeline is not stopped by a pre-installed water control valve and is constructed in a circulating state). The method and the device used in the method.

[Conventional technology]

 A large number of branch pipes are arranged in the water supply main.

In this cloth for branch pipes, regardless of whether it is in the water-free state or in the water-free state, a branch tap is attached to the main water supply pipe, and a water stop valve is connected to this (hereinafter referred to as "branch stopper with water stop valve"). It is said that a branch pipe is installed.

By the way, the branch pipe may be removed for various reasons.

When removing the branch pipe, a shut-off operation must be performed by the water control valve, and thus the branch plug with the water control valve will be left. At present, there is no method to remove this branch valve with water stop valve under uninterrupted water, and many branch valves with water stop valve are left as they are. Therefore, maintenance and management are troublesome.

[Problems to be solved by the invention]

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method and an apparatus for removing a branch plug with a water control valve from a water supply main under uninterrupted water.

B. Configuration of the Invention [Means for Solving the Problems] In order to achieve the above object, the present invention constructs a pair of frame columns with a branch plug with a water control valve to be removed sandwiched between them, and blocks the branch port at the tip. The basic technical idea is that the branch plug can be pulled out through the water stop shaft by applying a reaction force for supporting the water stop shaft to which the water stop lid is attached to the frame column. .

Specifically, the method for removing the uninterruptible water branch plug according to the present invention has the following configuration (technical means). That is, a pair of frame columns 20 are built in the fluid pipe P by sandwiching the branch valve S with a water control valve to be removed, and the water blocking lid 10 for closing the branch port Q is detachably attached to the tip, and the branch is performed. Shielding cylinder 25 watertightly attached to the stopper S
The water-stop shaft 24 mounted with is inserted forward with the frame column 20 as a supporting reaction force, the water-stop lid 10 mounted on the water-stop shaft 24 is fitted into the branch port Q of the fluid pipe P, and then the The branch plug S and the shielding cylinder 25 are removed via the water shutoff shaft 24 while maintaining the supporting reaction force of the water shutoff shaft 24 to the frame column 20, and then the water shut lid 10 is attached to the fluid pipe P.
It is characterized by being fixedly held at.

In this method, it is not always necessary to use all of the devices of the embodiments described later, and it is also possible to adopt an input operation as appropriate.

Further, the device for removing uninterrupted water from a branch plug according to the present invention has the following configuration. That is, a pair of frame columns 20 that are freely installed in the fluid pipe P with the branch valve S with a water control valve to be removed sandwiched therebetween.
And an intermediate girder 22 which is detachably bridged between the frame columns 20 and is movable along the frame columns and can be fixed to the frame columns, and a water stop fixedly held by the intermediate columns 22. It comprises a shaft 24 and a water shut lid 10 which is attached to the tip of the water shut shaft 24 so as to be freely attachable to close the branch port Q.

It should be noted that this structure is the minimum necessary for carrying out the method of the present invention, and in the embodiment, other additional constituent elements are added to exert a convenient action and effect.

[Action]

When removing the branch plug S from the water stop shaft 24, the branch plug S
The intermediate girder 22 is once removed from the frame column 20, and after being moved to the outside of the intermediate girder 22, the intermediate girder 22 is attached to the frame column 20 again, after which the branch plug S is removed from the water stop shaft 24. In the state where the intermediate girder 22 is removed, the water stop shaft 24 takes a supporting reaction force to the frame column 20 by another means.

The water shut lid 10 is directly fixed to the fluid pipe P by welding or the like, or is fixed to the fluid pipe P by using a water shut lid holding member fitted to the water shut lid 10. Is also free.

〔Example〕

Embodiments of a method for removing uninterrupted water from a branch plug and a construction device therefor according to the present invention will be described with reference to the drawings.

1 to 11 show a construction method of one embodiment and a construction device used for the method.

In the figure, P is an existing water distribution main pipe buried in the ground E, Q is a branch port bored on the side surface of the water distribution main pipe P, and the split character pipe R and the water control valve face the branch port Q. A branch plug S with a water control valve, which is composed of V and V, is attached. Further, T is a branch pipe connected to the branch plug S with the water control valve.

This branch plug S with a water shutoff valve is a known one,
The T-shaped pipe R is fixed around the main pipe P by a half-divided T-shaped pipe portion 100 and a band portion 102 with a tightening tool 104 composed of bolts and nuts, and a branch cylinder portion 106 of the T-shaped pipe portion 100 is provided at a branch port Q. Arranged facing.

The water control valve V is connected to the branch tube portion 106 by one flange 108 thereof, and is connected to the branch pipe T by the other flange 110. Then, by operating the valve body 112 of the water control valve V to move in and out, the flow of water between the main water distribution pipe P and the branch pipe T is interrupted.

It should be noted that, in this branch plug S with a water control valve, the diameter of the branch tube portion 106 and the diameter of the flow passage of the water control valve V are not smaller than the diameter of Q at the branch port.

Next, the construction apparatus of this embodiment will be described.

The construction apparatus of this embodiment is composed of a repair metal fitting and a removal tool.

FIG. 11 discloses all members of the repair metal fitting.

This repair metal fitting includes a water stopcock 10 for closing the branch port Q and a pipe P.
A semi-tubular water-stop lid holding member 11 that abuts from one side surface to press and hold the water-stop lid 10, and a semi-tubular water-stop lid holding member 11 that abuts from the other side surface of the pipe P and that faces the water shut lid holding member 11. A bolt 13 and a nut 14 for tightening the tubular contact member (band member) 12, the water blocking lid holding member 11 and the contact member 12 which are opposed to each other around the pipe P.
It includes a tightening tool (15), a plug (16) screwed to the water shut lid holding member (11), and a packing (17).

More specifically, the water blocking lid 10 is composed of a portion to be inserted into the branch port Q, that is, a water blocking portion 10a and a flange portion 10b protruding from the water blocking portion 10a and engaging with the outer periphery of the pipe P, and as a whole, appropriate. It has good hardness and resists water pressure. On the outer side of the collar portion 10b, an engagement protrusion 10c having an engagement hole for engaging with a water stop shaft described later is provided in a protruding manner. The water-stop lid holding member 11 has a water-stop lid at its center.
The plug insertion opening 11a is provided at a position relative to 10,
A screw portion 11b is formed inside thereof. Further, on the inner surface side of the water blocking lid holding member 11, there is formed an annular recess 11c which faces the plug insertion port 11a and accommodates and presses the water blocking lid 10. The plug 16 is screwed into the plug insertion port 11a of the water blocking lid holding member 11. The contact member 12 does not have to be a semi-tubular shape, and may be any member that clamps and fixes the water blocking lid holding member 11.

The main parts of the removal tool are disclosed in FIGS. 1 to 5.

This removal tool includes a pair of frame columns 20 fixedly installed in the main pipe P at a predetermined distance, and a frame girder 21 rotatably bridged between the frame columns 20 at the tip of the frame column 20. An intermediate girder 22 that is bridged between the frame pillars 20 at an intermediate portion of the frame pillar 20 and that can move along the frame pillar 20 and can be fixed to the frame pillar 20; A shaft 23, a water stop shaft 24 which is arranged to be connectable to the feed shaft 23 and coaxial with the feed shaft 23, and to which an intermediate girder 22 is attached, and a shield cylinder 25 which is attached to the tip of the water stop shaft 24, including.

More specifically, the frame column 20 has a main body 30 made of an elongated body of so-called channel material having a U-shaped cross section, and a saddle portion at the base.
It is rigidly erected on the saddle part 31a of the attachment part 31 composed of the band member 31a, the band part 31b, and the tightening tool 31c. The frame column 20 can be attached to the main pipe P by the attachment portion 31. Further, the groove portion of the channel material of the main body 30 is arranged outward. Body
An elongated hole 32 is formed on the side of the channel material in the middle of 30.

The frame girder 21 guides the feed shaft 23 by screwing at the leading end of the frame column 20 and has a pair of pin couplings at both ends.
It is installed so as to rotate on the plane created by. FIG. 4 shows the detailed structure thereof. The main body 34 of the frame girder 21 is made of a channel material, and a screw hole member 35 is fixedly provided at the center thereof. The screw portion of the feed shaft 23 is screwed into the screw hole 35a of the screw hole member 35. A pin holder 36 including bearing members 36a and 36b and a spacer 36c is provided at the end of the main body 34 facing the frame column 20. The pin 37 is inserted into the pin holder 36. A receiving plate 38 is fixed to the frame girder main body 34 and functions as a stopper. As a result, the frame girder 21 rotates about the pin 37 on the plane formed by the integrated frame column 20, and the receiving plate 38 stops the rotation at a predetermined position.

As shown in the detailed structure of FIGS. 3 and 5, the intermediate girder 22 has a main body 40 made of two split members, which are integrated by a fixing bolt 41, and are joined together at a central portion thereof to stop water. A square hole 42 for sandwiching and gripping the shaft 24 is formed. Further, both ends of the intermediate girder 22 are divided into forked portions 44, and are slidably fitted on the outer surface of the frame column main body 30. Pin hole 45 in the forked portion 44
Is opened.

In FIG. 5, the fixing means of the intermediate girder 22 to the frame column 20 is also shown. That is, the rib 47 is fixed to the frame column main body 30, and the notch recess 47a is formed in the rib 47. On the other hand, the fixture 48 includes a pin 49 inserted into the pin hole 45 of the intermediate beam 22, a bolt rod 50 rotatably fitted in the pin 49 with the pin hole 50a, and a screw portion 50b of the bolt rod 50. It consists of a nut 51 to be fitted.

The feed shaft 23 has a round bar shape with an equal cross section, and is screwed into a screw hole member 35 of the frame girder 20 with a screw portion 53 formed on the outer periphery thereof. A round bar-shaped projection 54 is provided at the front end of the feed shaft 23, and an engaging portion 55 of a rotating member (for example, a wrench) is formed at the rear end.

The water stop shaft 24 has a round bar shape with the same cross-section as the feed shaft 23, and a round hole 57 is formed in the rear end portion of the feed shaft 23 so that the projection 54 of the feed shaft 23 is loosely fitted therein. Ten mounting projections 58 are formed. The attachment projection 58 has a pin hole,
By inserting the pin 59 into the engagement hole formed in the engagement projection 10c of the water stop lid 10 described above, the water stop lid 10 can be attached to and detached from the water stop shaft 24.

A corner portion 60 sandwiched by the square hole 42 of the intermediate girder 22 is formed in the middle portion of the water stop shaft 24.

The shielding cylinder 25 is slidably fitted in a watertight state on the water shutoff shaft 24, and is also fitted so as to be in watertight contact with the flange 110 of the branch plug S with a water shutoff valve. That is, the still water shaft 24
An O-ring 61 is interposed in the sliding portion between the and, and a flange 62 provided at the opening end is abutted and fixed to the flange 110 of the branch plug S with a bolt. Reference numeral 63 is a valve that is attached to the shielding cylinder 25 and serves as an air vent and for inspection.

Next, a method of removing a branch plug using this construction device will be described.

Hereinafter, it demonstrates according to a construction procedure.

(1) Figure 10 shows the condition before the start of construction. A branch pipe T that is branched from a main distribution pipe P via a branch plug S with a water control valve
Is removed with the water control valve V of the branch plug S closed. K is a work space where the ground E around the branch plug S is excavated. Therefore, the method for removing the branch plug is performed after this step.

(2) Next, as shown in FIG. 1 and FIG. 2, a pair of frame columns 20 are built in the main pipe P with the branch plug S to be removed interposed, and a removal tool is attached. At this time, the frame girder 21 is
23 is screwed back. The intermediate girder 22, the water stop shaft 24, and the shield cylinder 25 are not yet mounted.

Next, the water stop lid 10 is attached to the tip of the water stop shaft 24 inserted through the shielding cylinder 25.
Mounted, and the shielding cylinder 25 is connected to the water control valve V through its flange.
Is watertightly attached to the end flange 110 of the. The intermediate girder 22 is clamped and fixed to the corner 24a of the water stop shaft 24, and is mounted so as to be slidable with respect to the frame column 20.

In this state, the feed shaft 23 screwed to the frame girder 21 is rotated and moved forward, and the tip projection 54 of the feed shaft 23 is moved to the round hole 57 at the rear end of the water stop shaft 24.
Insert it loosely. As a result, the feed shaft 23 and the water stop shaft 24 are arranged on the same axis.

(3) The water control valve V of the branch plug S is opened, the running water in the main pipe P is guided into the shielding cylinder 25, and the water pressure before and after the water shut lid 10 is made equal.

Then, the feed shaft 23 is rotated and the water stop shaft 24 is moved forward. When the water stop shaft 24 is advanced, the end 44 of the intermediate girder 22 is moved to the frame column main body 30.
Guided along, the water pressure spreads smoothly without buckling. Then, the water blocking lid 10 attached to the tip of the water blocking shaft 24 is fitted into the branch port Q of the main pipe P.
The water density is checked by opening and closing the valve 63 mounted on the shield cylinder 25 (see FIG. 6). In this state, the end 44 of the intermediate girder 22 reaches the elongated hole 32 of the frame column 20.

(4) While removing the intermediate girder 22 (shown by a chain line in FIG. 6), the mounting bolt 104 for attaching the split T-shaped pipe portion of the branch plug S to the main pipe P is removed, and the band portion 102 is first removed to remove the remaining branch plug S. It slides on the water stop shaft 24 and the feed shaft 23 together with the shield cylinder 25, and moves to a position in contact with the frame girder 21 or a position in the vicinity thereof (see FIG. 7).

In this state, the intermediate girder 22 is again sandwiched between the water stop shafts 24, and both ends 44 of the intermediate girder 22 are fixed to the frame column main body 30.

The fixing of the intermediate digit 22 is performed as follows. Middle digit
The pin hole 45 of the forked portion 44 of 22 and the elongated hole 32 of the frame column main body 30 are aligned with each other, the pin 49 is inserted into the pin hole 45 and the elongated hole 32, and the pin hole of the bolt rod 50 is inserted. Insert into 50a. After that, the bolt rod 50 is fitted into the notched concave portion 47a of the rib 47 of the frame column main body 30, the nut 51 is tightened, and the rib 47 is brought into abutment with a strong pressure. As a result, the intermediate girder 22 is fixed at a fixed position, and thus the water stop shaft 24 is also fixed.

(5) As shown by the chain line in FIG. 7, the feed shaft 23 is rotated in the backward direction to release the engagement with the water stop shaft 24.

Thereafter, the frame girder 21 is rotated with respect to the frame column 30 to displace the direction of the feed shaft 23 by 90 °, and the branch plug S disassembled in this state
Is removed from the feed shaft 23.

As a result, the substantial work of removing the branch plug S is completed, and if the water shut lid 10 and the water distribution main pipe P can be welded to each other, they may be directly fixed to each other.

(6) Following the above steps, the water stop lid holding member 11 of the repair fitting is attached to the feed shaft 23 (see FIG. 8).

Next, as shown by the chain line in FIG. 8, the feed shaft 23 is tilted down so that the feed shaft 23 and the water stop shaft 24 are aligned with each other.

(7) The feed shaft 23 is rotated forward so that the tip 54 of the feed shaft 23 is stopped.
The feed shaft 23 and the water stop shaft 24 are integrated with each other by engaging with the rear end portion 57, and then the intermediate girder 22 is removed.

Further, the engagement pin 59 between the water shut lid 10 and the water shut shaft 24 is also removed.

(8) In this state, the water stop lid holding member 11 is moved forward on the feed shaft 23 and the water stop shaft 24 to cover the water stop lid 10 and to be watertightly attached to the main pipe P by the tightening tool 15 by the contact member 12. (See FIG. 9).

(9) The feed shaft 23 is rotated and retracted, the engagement with the water stop shaft 24 is released, and the water stop shaft 24 is removed.

After that, plug 16 into the screw hole at the center of the waterproof lid holding member 11.
Screw on to completely stop the water.

In this way, the remaining removal tool is removed from the main pipe P, and the removal work of this branch plug is completed.

As is clear from the above description, in the present embodiment, the water stop shaft 24 and the feed shaft 23 are separated, and the feed shaft 23 is a frame girder.
Since it can be rotated together with 21, the work space K can be narrowed without requiring a large work space for removing and installing the disassembled branch plug S and the water blocking lid holding member 11. Therefore, excavated sediment will be reduced in the underground distribution pipeline, which will be economical.

Further, the intermediate girder 22 not only guides the forward movement of the water shut off shaft 24, but also fixes the water shut off shaft 24 to the frame column 20 to exert multiple functions.

(Modification) In the present embodiment, the feed shaft 23 and the water stop shaft 24 are separated, but the water stop shaft 24 is made longer and a supporting reaction force is applied to the frame girder 21 to adopt a pushing method using a hydraulic cylinder or the like. You can also

Figure 12 shows an example. In the figure, reference numeral 70 denotes a hydraulic cylinder, which is fixed to the frame girder 21, and its rod 70a is detachably fixed to the reaction force girder 71 with a pin. The water stop shaft 24 and the reaction force girder 71 are detachably attached, and are fitted and fixed, for example, with a tenon. In this embodiment, the frame girder 21 needs to be removable from the frame column 20.

The present invention is not limited to the above embodiments, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are included in the technical scope of the present invention.

The frame girder 21 fixed to the tip of the frame column 20 can take not only the rotation by the pin 37 but also various attachment modes. That is, (a) the frame girder 21 can be completely removed from the frame column 20, and (b) the one end of the frame girder 21 can be opened by pin connection.

Propulsion of the feed shaft can be performed by using, for example, a hydraulic cylinder without depending on the turning force of the screw. In this case,
The frame girder is directly linked to the feed shaft of the rod of the hydraulic cylinder.
The reaction force is applied to 21 and the pushing operation is performed.

C. Effects of the Invention According to the method and apparatus for removing uninterrupted water of a branch plug according to the present invention, the branch plug after removal of the branch pipe can be removed in a water-free state, and various adverse effects due to the branch plug that has been left behind can be eliminated. It is possible and brings great economic benefits.

[Brief description of drawings]

The drawings show an embodiment of an uninterrupted water removal method of a branch plug and an apparatus thereof according to the present invention, FIG. 1 is a plan view showing the entire water removal plug removal apparatus of one embodiment, and FIG. FIG. 3 is a sectional view taken along the line ii of FIG. 1, FIG. 4 (a) is a detailed view of a portion C of FIG. 1, and FIG. 4 (b) is a sectional view of FIG. -D-line cross-sectional view, (c) view is a view in the direction of arrow (a), FIG. 5 (a) is a detailed plan view of the intermediate girder in a fixed state, and (b) is a view of (a). 6 to 9 are views showing the construction process following the construction mode shown in FIG. 1, FIG. 10 is a state diagram before the construction starts, FIG. 11 is a state diagram after the construction is completed, and FIG. The figure is another view of the still water shaft. P ... Fluid pipe, Q ... Branch port, S ... Branch valve with water control valve, 10 ...
Water stop lid, 11 ... Water stop lid holding member, 20 ... Frame column, 22 ... Intermediate girder,
24 ... Still water shaft, 25 ... Shield cylinder

Claims (3)

[Claims] 1. A water stop for inserting a pair of frame columns (20) into a fluid pipe (P) with a branch valve (S) with a water control valve to be removed, and closing a branch port (Q) at the tip. The lid (10) is detachably attached, and the water shutoff shaft (24) equipped with a shield cylinder (25) that is watertightly attached to the branch plug (S) is advanced using the frame column (20) as a reaction force. The water shut-off lid (10) inserted into the water shut-off shaft (24) is fitted into the branch port (Q) of the fluid pipe (P), and then the branch plug (S) and the shield tube (25). ) Is removed via the water stop shaft (24) while maintaining the reaction force of supporting the water stop shaft (24) on the frame column (20), and then the water stop lid (10) is attached to the fluid pipe (P). The method for removing water from a branch plug without interruption is characterized in that it is fixedly held at. 2. A pair of frame pillars (20) that are freely installed in a fluid pipe (P) with a branch valve (S) with a water control valve to be removed sandwiched between the frame pillars (20). An intermediate girder (22) which is laid across in a disassembled manner and is movable along the frame column and can be fixed to the frame column; and a water stop shaft (24) which is fixedly held by the intermediate beam (22). An uninterruptible water removal device for a branch plug, comprising: a water stop lid (10) for closing a branch port (Q) that is detachably attached to the tip of the water stop shaft (24). 3. The uninterrupted water removal device for a branch plug according to claim 2, wherein the water stop shaft (24) can be replenished outside the intermediate girder (22).