JPH0814357B2 - Water pipe branch plug replacement method and apparatus used for the method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for replacing a branch tap of a water pipe and an apparatus used for the method, and an object thereof is to stop the flow of water in a water main. An object of the present invention is to provide a method for replacing a branch plug of a water pipe that can easily replace a branch plug connected to the water main at a replacement site, and an apparatus used for the method.

(Prior art) For aging of the branch plug provided in connection with the water main to branch and supply tap water from the water main to each home or store, or to greatly increase the amount of tap water. In the method of performing replacement by the method described above, first, the flow of tap water in the water main was stopped, and then the branch plug was replaced.

However, if the branch plug is replaced after stopping the flow of tap water in the water main as described above, tap water is supplied from this water main through another branch plug. There was a problem that all the flow of tap water in the water pipe stopped and the supply of tap water was not received until the completion of the branch plug replacement work, which hindered daily life.

As a technique for solving the above-mentioned problems,
In Japanese Patent Publication No. 982, a "spoutless branch pipe connecting device" is disclosed.

In this technique, in order to connect a branch plug to an existing pipe, one end of a valve is attached to the existing pipe, a perforator is airtightly attached to the other end of the valve, and a perforation is performed through a flow path of the valve with the valve open. Apply the cutter of the machine to the existing pipe and open the branching flow port in the existing pipe, then retract the cutter of the perforator and close the valve, remove the perforator, and connect the branch pipe to this. In the device described above, a pair of wings having a radius of curvature equal to the outer shape of the existing pipe is formed at the end of the valve to be connected to the existing pipe, and the wings are connected to the existing pipe by welding to form a branch pipe. The branch pipe is connected to the existing pipe without using the connecting short pipe.

Further, as a method for removing a synthetic resin take-out pipe having a proximal end fixedly connected to a take-out hole formed in a side wall of a pipe for transporting a fluid, a tank for storing a fluid, etc., Japanese Patent Laid-Open No. 58-46288 In the official gazette, "method for removing synthetic resin take-out pipe" is disclosed.

This disclosed technology prepares a plug mounting machine for inserting and displacing a removable plug in the extraction tube, and narrows the middle of the extraction tube in the longitudinal direction to close the plug and attach it to the free end of the extraction tube. Attach airtightly, open the closed state of the extraction pipe, insert the plug into the extraction hole using the plug mounting machine, remove the plug from the plug mounting machine, remove the plug mounting machine from the free end of the extraction tube, The attachment pipe is cut near the base end and hermetically closed by heat fusion near the base end.

Further, as a branch pipe joint which is perforated and attached to a pipe body of gas or the like, Japanese Utility Model Laid-Open No. 61-128493 discloses "a branch pipe joint that can be shut off".

The disclosed technique includes a main body having a screw on the outer periphery, a valve that shuts off in a natural state, and a pipe joint, and has a configuration in which the axis of the pipe joint is aligned with the axial direction of the screw.

(Problem to be solved by the invention) However, in the "non-jetting branch pipe connecting device" disclosed in the above Example 63-51982, although the branch pipe can be connected without jetting the fluid in the pipe, it is possible to connect to the existing pipe. Since it is necessary to use welding as a connecting means,
There has been a problem that it is not possible to connect a synthetic resin or the like to a pipe.

Further, in the "method for removing a synthetic resin take-out pipe" disclosed in Japanese Patent Laid-Open No. 58-46288, a machine for attaching a plug to a take-out pipe when a plug attachment machine is attached to the take-out pipe to release the closed state of the take-out pipe Since the mounted state is simply fitted and is not sufficiently fixed to the pipe, there is a problem that the plug mounting machine may come off the take-out pipe due to the pressure of the fluid in the pipe.

Further, in the "Branch pipe joint that can be shut off" disclosed in Japanese Utility Model Publication No. 61-128493, since a hole saw is used as the piercing means, chips enter the pipe through the piercing hole, and a pipe for circulating a liquid such as a water pipe. There was a problem that it was not suitable for construction.

Therefore, in view of the conventional situation described above, the present inventors can easily replace the branch plug without stopping the flow of the tap water in the water main, and can solve the above problems. And continued to study the equipment used for the method.

(Means for Solving the Problem) That is, as a method according to the present invention, a male screw portion at one end is screwed into a screw hole having male screw portions at both ends and drilled in a pipe wall of a water main to establish a communication state. When replacing the fixed branch plug with another branch plug without stopping the tap water flow, it has a substantially cylindrical shape and is screwed at one end to the outer end of the fixed branch plug in the water main. A female threaded portion to be opened and closed, a water sealing member having a sealing material at the end of the female threaded portion, and an end wall portion attached to an outer end of the water sealing member, which is vertically movable and rotatable. A substantially bottomed cylindrical support member through which a shaft member is inserted and supported, and an inner peripheral wall, which is detachably attached to an end portion of the shaft member on the water mains side, except the attachment portion of the fixed branch plug. And a fixed branch that is detachably attached to the water pipe main side end of the shaft member. A water pipe branch plug using a device having an inner peripheral surface of a mounting portion of a stopper and a screw tap for forming a screw hole for screwing a male screw portion of an outer peripheral portion of an embedding member made of a soft metal A replacement method, wherein the female screw portion of the water sealing member is screwed into the male screw portion of the other end of the fixing branch plug, and the embedding member is embedded in the mounting portion through the fixing branch plug to form a sealing plug state, and then fixed. Cut a portion of the mounting portion of the branch plug at the same position as the outer peripheral surface of the water main pipe, and form a screw hole in the mounting portion of the water main pipe or at another portion using a drill with a water sealing device. It is characterized in that a male screw portion of the outer peripheral portion of the mounting portion of another branch plug is screwed into the hole to be mounted.

Further, the present invention is characterized in that an embedding member is press-fitted and embedded in the attachment portion of the fixed branch plug.

Further, a screw hole is formed in the inner peripheral surface of the mounting portion by a screw tap only on the inner peripheral wall of the fixed branch plug and the inner peripheral surface of the mounting portion or the inner peripheral surface of the mounting portion, and the soft metal is formed in the screw hole portion. It is characterized in that a male screw portion provided on the outer peripheral surface of the embedding member made of is screwed into a plugged state.

Further, as the device, a branch plug and another branch plug, which have male threaded portions at both ends and are screwed with male threaded portions at one end into screw holes formed in the pipe wall of the water mains, are fixed in a communicating state. A device used when replacing tap water flow without stopping, which has a substantially cylindrical shape to be attached to an outer end of the water tap main of the fixed branch plug and has the water tap of the fixed branch plug at one end. A female threaded portion screwed to the outer end of the pipe and an openable / closable water sealing member having a sealing material at the female thread end, and an end wall portion attached to the outer side end of the water sealing member. A substantially bottomed tubular support member having a rotatable shaft member inserted through and supported by the shaft member, and an attachment of the fixed branch plug detachably attached to an end of the shaft member on the water mains side. A drill that expands the inner peripheral wall except the part and the end of the shaft member on the water mains side. A screw tap which is detachably attached to the inner peripheral surface of the mounting portion of the fixed branch plug and which has a screw hole for screwing a male screw portion of an outer peripheral portion of an embedding member made of a soft metal. Is.

Then, by providing the above-mentioned method for replacing a branch pipe of a water pipe and an apparatus used for the method, a method and an apparatus capable of solving the above problem to be solved have been successfully created.

(Example) Hereinafter, a method of replacing a branch plug of a water pipe according to the present invention will be described with reference to FIGS. 1 to 6.

In the drawing, (1) is a male screw portion (11a) of a mounting portion (11) screwed and fixed to a screw hole (2a) provided at a predetermined position on a peripheral wall of a water main (2) through which tap water flows. A branch plug having a water sealing opening / closing part (13) which is opened / closed by a closing knob (12), and the branch plug (1) is attached before replacement work.

Further, (3) is a replacement device used when replacing the branch plug (1) with another new branch plug (not shown) having a large inner diameter. This exchange device (3) is opened and closed by screwing an external thread (14a) of the outer end (14) of the branch plug (1) with a female thread (31a) of the water main end. A substantially tubular water sealing member (31) having a possible opening / closing part (31b) and a lever (31c) for opening / closing the opening / closing part (31b),
The male threaded portion (32a) is screwed onto the female threaded portion (31d) at the outer end of the water sealing member (31), and the end wall portion (3
2b) has a handle portion (33a) in a through hole (32c) provided at an upper end portion thereof, and has a substantially bottomed tubular support member in which a shaft member (33) is rotatably and rotatably inserted. (32),
A drill (35) removably attached to the water mains side end of the shaft member (33) by a mounting screw (34) and a screw tap (36).

In the figure, (37) is the end wall portion (32) of the support member (32).
A lid member in which a female screw portion (37a) is screwed into a male screw portion (32d) provided on the outer peripheral portion of b).
Between the inner wall surface of (7) and the recess (32f) formed in the end wall portion (32b) of the support member (32), a water sealing material (3
2g) has been distributed.

Further, (38) and (39) are between the upper end of the branch plug (1) and the lower end of the water sealing member (31) and between the upper end of the water sealing member (31) and the lower end of the support member (32). It is an O-ring for sealing water made of a rubber material distributed between and.

With the above structure, first, as shown in FIG. 1, the drill (35) is attached to the shaft member (33), the shaft member (33) is lowered, and the handle portion (33a) is rotated to form the shaft member (33). The drill (35) is rotated and the inner peripheral wall (15) of the branch plug (1) is bored by the drill (35) so as to be larger in diameter than the inner peripheral surface of the mounting portion (11).

After that, pull up the shaft member (33) and attach the screw (3
4) is removed and the drill (35) is replaced with a screw tap (36) as shown in FIG. At this time, the sealing member (3
In 1), the lever (31b) is closed and tap water is sealed so that it does not flow upward.

Then, after rotating the water sealing member (31c) in the opposite direction to open the opening / closing member (31b) to release the water sealing state, the shaft member (33)
Lower and turn the handle (33a) to rotate the shaft member (3
3) and the screw tap (36) are rotated to form a female screw part (11b) on the inner peripheral surface of the mounting part (11) with this screw tap (36) as shown in FIG.

Then, rotate the shaft member (33) in the reverse direction and screw tap (3
6) Pull up.

Thereafter, the female screw portion (11a) of the mounting portion (11) is screwed into the female screw portion (4a) provided on the outer peripheral portion of the embedding member (4) made of a soft metal such as brass, as shown in FIG. Make a stoppered state. After that, as shown in FIG. 5, a portion of the mounting portion (11) of the branch plug (1) substantially at the same position as the outer peripheral surface of the water mains (2) is cut laterally.

Then, in this state, a screw hole (2b) is bored on the peripheral wall of the water main (2) where the plugged attachment part (11) is present, as shown in FIG. Screw hole (2b)
Then, the male screw portion of the mounting portion of another new branch plug (not shown) having a large inner diameter is screwed into and fixed.

Then, a water pipe from each home or store is connected to this new branch plug, and the branch plug replacement work is completed.

In the above-described embodiment, the inner peripheral wall (15) of the branch plug (1) is expanded and drilled with the drill (35), and then the female tap (11b) is attached to the inner peripheral surface of the mounting portion (11) with the screw tap (36). As mentioned above, the inner wall of the branch plug (1) (1
5) is not drilled with a drill (35) to form a female screw portion from the inner peripheral wall (15) of the branch plug (1) to the inner peripheral surface of the mounting portion (11) with a screw tap (36). Good.
In addition, after the inner peripheral wall (15) of the branch plug (1) is expanded and bored by the drill (35) or the inner peripheral wall of the branch plug (1) ( Mounting part (11) without expanding the diameter of 15) with a drill (35)
It is also possible to press-fit an embedding member of lead or the like into the inside to make a plugged state.

Further, as shown in FIG. 7, a piercing tool (56) having an upper part formed in a drill part and a lower part formed in a screw tap part is attached to the tip of the shaft member (33) on the water mains side, and the branch plug is attached. (1)
The inner peripheral wall (15) of the piercing tool (56) is pierced immediately after the piercing with the screw tap portion of the piercing tool (56), and the inner peripheral surface of the mounting portion (11) of the branch plug (1) is pierced. It is also possible to form the female screw portion (11b) in the attachment portion (11) by drilling only the screw tap portion of the tool (56).

(Effect of the Invention) As a method, the present invention provides a branch plug which has male threaded portions at both ends and is screwed with a male threaded portion at one end into a screw hole formed in a pipe wall of a water main to be fixed in a communicating state. When replacing another branch plug with another tap plug without stopping the flow of tap water, it has a substantially cylindrical shape, and at one end, a female screw portion screwed to the outer end of the water tap main of the fixed branch plug. An openable / closable water-sealing member having a sealing material at the end of the female screw portion, and an axially movable and rotatable shaft member are inserted into an end wall portion attached to an outer side end portion of the water-sealing member. A supported substantially cylindrical support member having a bottom, a drill detachably attached to the end of the shaft member on the side of the water mains for expanding the diameter of the inner peripheral wall excluding the attachment portion of the fixed branch plug, and It is removably attached to the water pipe main side end of the shaft member and is softened to the inner peripheral surface of the attachment part of the fixed branch plug. A method of replacing a water pipe branch plug using a device equipped with a screw tap having a screw hole for screwing a male screw portion of an outer peripheral portion of an embedding member made of a porous metal, wherein the fixed branch The female threaded portion of the water sealing member is screwed into the male threaded portion of the other end of the stopper, and the embedding member is embedded into the mounting portion through the fixed branching plug to form a sealed state, and then the water main pipe of the fixing branching plug mounting portion. Cut a portion approximately at the same position as the outer peripheral surface and form a screw hole in the attachment portion of the main water main or another portion using a drill with a water seal device, and attach another branch plug to this screw hole Characterized in that the male screw portion of the outer peripheral portion is screwed and mounted, and the embedding member is press-fitted and embedded in the mounting portion of the fixed branch plug.
A screw hole is formed in the inner peripheral surface of the mounting portion by a screw tap only on the inner peripheral wall of the fixed branch plug and the inner peripheral surface of the mounting portion or the inner peripheral surface of the mounting portion, and the screw hole portion is made of a soft metal. A male screw portion provided on the outer peripheral surface of the embedding member is screwed into a sealed state, and the device has male screw portions at both ends and is drilled in a pipe wall of a water main. A device used when replacing a branch plug fixed in communication with a male screw part of a mounting part in a screw hole and another branch plug without stopping tap water flow, wherein the fixed branch plug is A female screw portion having a substantially cylindrical shape to be attached to the outer end of the water main and screwed at one end to the outer end of the fixed branch plug in the water main, and the female screw terminal end portion. An openable / closable water sealing member having a sealing material and attached to the outer end of this water sealing member A support member having a substantially bottomed shape, in which an axially movable and rotatable shaft member is inserted into and supported by an end wall portion, and the water pipe main side end portion of the shaft member is detachably attached and fixedly attached. A drill for expanding the diameter of the inner peripheral wall excluding the mounting portion of the branch plug, and a removable metal that is detachably mounted on the water pipe main side end of the shaft member and is made of a soft metal on the inner peripheral surface of the mounting portion of the fixed branch plug. The following effects are achieved by including a screw tap for forming a screw hole for screwing the male screw portion on the outer peripheral portion of the embedding member.

That is, since the existing pipe and the replacement device are screwed together with screws, the connection is strong, and the pipe and the replacement device come off during the work due to the fluid pressure in the pipe, and a large amount of water, gas, etc. in the pipe is ejected to the outside. There is no fear that it will end.

Moreover, the mounting can be performed without being affected by the material of the pipe on the mounting side.

Further, since the surface of the main pipe and the remaining portion of the mounting pipe are flush with each other after cutting the mounting pipe, there is no risk of fluid leakage from the main pipe due to damage to the remaining portion of the mounting pipe due to other excavation work or the like.

Further, since a drill with a water sealing device is used as a piercing means when attaching another branch plug, chips do not rise along the groove as the drill rotates and do not fall into the inside of the pipe.

Furthermore, since the replacement device itself is provided with a sealing part, the work switching between piercing and embedding can be performed in a sealed state so that the fluid in the pipe does not spout. There is no eruption to the outside.

Therefore, the branch plug connected to the water main can be easily replaced at the replacement site without stopping the flow of water in the water main. As a result, households, shops, etc. that are supplied with tap water from each branch plug can receive the tap water supply without being affected by the branch plug replacement work.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a device used in a method for replacing a branch pipe of a water pipe according to the present invention, a water main pipe and a branch plug before drilling work, and FIG. FIG. 3 is a vertical cross-sectional view of a state before the work, FIG. 3 is a vertical cross-sectional view of the state after the tapping work of the screw tap, and FIG. 4 is a vertical cross-sectional view of a state in which an embedding member is embedded in the mounting portion of the branch plug. FIG. 5 is a vertical cross-sectional view showing a state in which the outer peripheral surface of the water main at the mounting portion of the branch tap is cut off at approximately the same portion as that of the tap, and FIG. 6 is the installation of the water main to attach another branch tap with a large inner diameter. FIG. 7 is a vertical cross-sectional view showing a state in which a screw hole is drilled in the portion, and FIG. (1) …… Branch plug, (2) …… Water main, (2a) …… Screw hole, (2b) …… Screw hole, (11) …… Mounting part, (11a)
…… Male screw part, (31) …… Water sealing member, (32) …… Supporting member, (32b) …… End wall part, (33) …… Shaft member, (35)…
… Drill, (36) …… Screw tap

Claims (5)

[Claims] 1. A branch plug and a branch plug, which have male threads on both ends and are screwed into a threaded hole formed in a pipe wall of a water mains, and which are fixed to each other by screwing the male thread on one end. When the tap water flow is replaced without stopping, it has a substantially cylindrical shape, and has a female screw portion that is screwed to one end of the fixed branch plug on the outer side end of the water main and a seal is formed at the end portion of the female screw portion. And a substantially bottomed cylinder in which a rotatable shaft member is inserted through and supported by an end wall portion attached to an outer side end portion of the water sealing member -Shaped support member, a drill that is detachably attached to the end of the shaft member on the side of the water main, and that has an inner peripheral wall excluding the attachment portion of the fixed branch plug that is expanded in diameter, and the water main of the shaft member. Outside the embedded member made of soft metal on the inner peripheral surface of the attachment portion of the fixed branch plug detachably attached to the end portion. A method of replacing a water pipe branch plug using a device provided with a screw tap for forming a screw hole for screwing a male screw part of the plug part, wherein the other end of the fixed branch plug has the male screw part with the seal. The female screw part of the water member is screwed, and the embedding member is embedded into the mounting part through the fixed branch plug to form a sealed state, and then the part of the fixed branch plug mounting part at the same position as the outer peripheral surface of the water main is cut. Then, use a drill with a water sealer to form a screw hole in the mounting part or other part of the water main, and screw the male screw part of the outer periphery of the mounting part of another branch plug into this screw hole. A branch plug replacement method for water pipes, characterized in that 2. Before the embedding member is embedded in the mounting portion of the fixed branch plug to form a sealed state, the inner peripheral wall of the fixed branch plug excluding the mounting portion is drilled so that the inner peripheral wall is inside the mounting portion. The method of replacing a branch plug of a water pipe according to claim (1), wherein the diameter is enlarged from the peripheral surface. 3. An embedding member is press-fitted and embedded in the mounting portion of the fixed branch plug.
The method of replacing a water pipe according to item (2). 4. A screw hole is formed in the inner peripheral surface of the mounting portion by a screw tap only on the inner peripheral wall of the fixed branch plug and the inner peripheral surface of the mounting portion, or only the inner peripheral surface of the mounting portion. The water pipe according to claim (1) or (2), characterized in that a male screw portion provided on the outer peripheral surface of the embedding member made of a soft metal is screwed into the plug to bring about a sealed state. Replacement method. 5. A branch plug, which has male threads at both ends and is screwed with a male thread at one end into a threaded hole formed in the pipe wall of a water main, and which is fixed in a communicating state, and another branch plug. A device used when replacing tap water flow without stopping, which has a substantially cylindrical shape to be attached to an outer end of a water main of the fixed branch plug, and has a water tap of the fixed branch plug at one end. An openable / closable water-sealing member having a female threaded portion screwed to the outer end of the main pipe and a sealing material at the female threaded end.
A substantially bottomed cylindrical support member that is attached to the outer end of the water sealing member and has an end wall that is vertically movable and has a rotatable shaft member inserted through and supported, and a water supply book of the shaft member. A drill which is detachably attached to the pipe side end and which has a diameter of the inner peripheral wall excluding the attachment portion of the fixed branch plug, and the removable branch plug which is detachably attached to the water main end of the shaft member. It is used for a method of replacing a branch plug of a water pipe, which is equipped with a screw tap for forming a screw hole for screwing a male screw portion of an outer peripheral portion of an embedding member made of a soft metal on an inner peripheral surface of a mounting portion of apparatus