JPH0326388Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a repair fitting that is attached to a leakage point of a fluid pipe and used to seal the leakage. Regarding the repair fittings used.

Note that the present invention is mainly applied to liquid fluids under pressure.

[Prior Art] This type of repair fitting has been proposed in Japanese Utility Model Publication No. 37-24256 and Japanese Utility Model Publication No. 44-9874.

In both known techniques, a fluid pipe surrounding a water leakage point is surrounded by a casing made of a multi-split body, and a packing fitted into a mounting groove on the inner surface of the casing is pressed against the outer surface of the fluid pipe to close the casing. It is designed to be fitted in a fluid pipe in a watertight manner. Thereby, water leakage flowing into the casing from the water leakage point is contained in the gap space between the inner surface of the casing and the outer surface of the fluid pipe, and the water is stopped.

However, in both of these known techniques, no matter how the packing is fitted into the mounting groove on the inner surface of the casing, in the process of tightening the casing to the fluid pipe, the leakage pressure between the casing and the fluid pipe gradually increases. The height will increase, and the packing will eventually come out of the mounting groove. Of course, this tendency is more likely to occur the higher the fluid pressure is, but if the surface of the fluid pipe is wet with water and a so-called water supply occurs, it is likely to occur even at a small pressure, which is a problem in known technology. It is a dot.

[Technical issues of the present invention] In view of the above-mentioned circumstances, the present invention provides a special device to the casing to maintain the water-stopping effect of the packing without increasing the pressure of the fluid flowing into the casing from the leakage point. The purpose (technical problem) is to provide repair fittings that can be repaired.

[Structure of the idea]

In order to achieve the above purpose, the water leak repair fitting of the present invention adopts the following configuration (technical means). In other words, in a casing that is composed of multiple split bodies and is attached to a fluid pipe in a sealed manner with hard packing fitted into the mounting groove on the inner surface of the casing to seal out incompressible fluid, the appropriate split bodies are used. A water conduit with a male thread carved on its outer periphery is formed protrudingly on the outer surface of the casing, and the water conduit has one end communicating with the inside of the casing and the other end opening horizontally to the side. A female thread is carved on the inner periphery of the stopper of the lid body to be screwed into the male thread of the water conduit, and when the stopper is screwed together, the opening of the water conduit is closed. shall be.

[Effect]

With this configuration, this repair fitting is operated and performs its functions as follows.

Attach the casing to the fluid pipe with packing to surround the water leak hole in a watertight manner. During this work, the pressure water flowing into the casing from the leakage hole is discharged to the outside from the water conduit. Lightly tighten the stopper into the water pipe to a position near the opening. Thereafter, after confirming that there is no abnormality in the packing attached to the casing, the plug is tightened across the opening of the water conduit to seal off the pressure water in the casing.

In this operation, the plug is installed without resisting the pressure water, and the closing operation of the opening of the water conduit does not change the fluid volume by crossing the opening and does not increase the pressure. The screw action closes the opening with a large force.

〔effect〕

The fitting for repairing a water leakage point in a fluid pipe according to the present invention has the following unique effects by adopting the above-mentioned structure and functioning.

During the installation work of the casing to the fluid pipe, the pressure water that flows into the casing from the water leak hole is appropriately discharged to the outside from the water conduit channel, so the pressure inside the casing does not increase, and the packing placed on the casing has a watertight effect. be able to function properly.

Coupled with the above effects, since the pressure inside the casing does not increase, the work of attaching the casing to the fluid pipe can be carried out easily.

Since the opening of the water conduit is arranged horizontally, it is easy to attach the stopper during water shutoff work.

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

1 to 3 show an embodiment of the repair fitting of the present invention.

Here, P is a fluid pipe, and Q is the fluid pipe P.
This is a water leak hole that occurred. This repair fitting H is fitted into the fluid pipe P around the water leak hole Q.

Reference numeral 1 denotes a casing, which is usually formed by metal casting. The casing 1 is divided into two parts 1A and 1B.
The flanges 2 formed at both ends of the two-piece bodies 1A and 1B face each other (or abut each other), and the fixing bolt 3 is inserted into a bolt insertion hole (not shown) drilled in the flange. can be assembled together.

In this embodiment, the casing 1 is divided into two parts, but it is of course possible to take a form in which it is divided into three or more parts.

Packing receiving portions 4 are formed in a bulging manner at both ends of the casing 1, and packing 7 is interposed between the grooves 5 on the inner surface of the receiving portions 4 and the facing portions of the two halves 1A and 1B to make the casing 1 watertight.

The packing 7 is made of a hard rubber material or synthetic rubber material, and exhibits great pressure resistance against high pressure water.

Reference numeral 10 denotes a water guide pipe formed protrudingly from the center of the two halves 1A of the casing 1. A water conduit 11 is formed in the center of the water conduit 10, one end of which communicates with the inside of the casing 1, and the other end opening 12 in the horizontal direction. 10a is a male thread screwed on the outer periphery of the water pipe 10.

Reference numeral 13 denotes a base plane of the water conduit 10, and a circumferential groove 14 is provided on the base plane 13 surrounding the conduit 10.
is drilled therein, and an O-ring 15 is inserted into the groove 14.

Reference numeral 17 denotes a stopper, which is a cylindrical body with one end open, so-called a cap shape. A female thread 17a is screwed on the inner periphery of the stopper 17, and is screwed into a male thread 10a on the outer periphery of the water pipe 10. 17b is plug body 1
This is the open end of No.7.

Water stoppage work using the repair fittings of this example will be described.

The steps will be explained below in order.

(1) Assemble the two halves 1A and 1B of the casing 1 around the leak hole Q of the fluid pipe P with their flanges 2 facing each other and tighten the bolts 3 to form an integrated casing 1.

At this time, from the viewpoint of workability, the split body 1A having the water conveyance pipe 10 is arranged so as to be located above in the case of underground piping.

By tightening bolt 3, casing 1
The packing 7 attached to the groove 5 on the inner surface of the fluid pipe P is pressed against the surface of the fluid pipe P, and exhibits its watertightness.

(2) The pressure water spouting from the leak hole Q is in the casing 1.
The liquid fills the space I between the pipe P and the fluid pipe P, passes through the water conduit 11 of the water pipe 10, and is discharged from the opening 12. Therefore, the pressure within space I does not increase.

Even if the amount of pressure water discharged from the water leakage hole Q is large and the space I is filled with pressure water during the tightening work of the bolt 3, the operability of tightening the bolt 3 does not change.

(3) Attach the stopper 17 to the water pipe 10 with each other's screws 17.
a, 10a and screw together, rotate the plug 17 and tighten until the open end 17b comes to the upper end of the opening 12 (this is called "initial tightening" of the plug)
).

(4) After confirming that there is no water leakage from the packing 7, tighten the stopper 17 further. At this time, if the amount of water discharged from the opening 12 is large and the pressure of the pressure water is high, the tightening resistance of the stopper 17 will increase as the opening 12 gradually closes. This can be easily done by using a separate wrench.

(5) Tighten the plug 17 further until the open end 17b of the plug 17 collides with the base flat surface 13 of the water pipe 10, and confirm that the O-ring 15 has a sufficient water-stopping effect. and complete the construction work.

In the above steps, the initial tightening step (3) may be carried out at any appropriate time between the casing 1 installation steps (1) and (2).

The present invention is not limited to the above-mentioned 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 within the technical scope of the present invention.

A mode in which a plurality of horizontal openings 12 of the water pipe 10 are provided in the circumferential direction.

In this embodiment, instead of the O-ring 15 for making the contact surface between the base plane 13 of the water pipe 10 and the open end 17b of the stopper 17 watertight, other suitable water-stopping means (for example, a gasket) are used.

[Brief explanation of the drawing]

The drawings show an embodiment of the fitting for repairing a water leakage point in a fluid pipe according to the present invention, and FIG. 1 is a partial cross-sectional side view showing the sealed state of one embodiment, and FIG.
The line cross-sectional view and FIG. 3 are exploded views showing the outline of the construction according to this embodiment. P... Fluid pipe, Q... Leak hole, 1... Casing, 7... Packing, 10... Water guide pipe, 10
a... Screw, 11... Water headrace, 12... Water lead port,
17...Plug body, 17a...Screw.

Claims (1)

[Claims for Utility Model Registration] Consisting of multi-divided split bodies 1A and 1B, the hard packing 7 is fitted into the mounting groove on the inner surface of the split body, and the fluid pipe P is sealed in a manner that the incompressible fluid In the casing 1 for sealing, a water guide tube 10 with a male thread 10a carved on its outer periphery is formed protrudingly on the outer surface of a suitable split body 1A, and one end of the water guide tube 10 is attached to the inside of the casing 1. A water conduit 11 is formed with the other end opening 12 horizontally, and a female thread 17a is formed on the inner periphery of the lid-shaped stopper 17 to be screwed into the male thread 10a of the water conduit 10. A fitting for repairing a water leakage point in a fluid pipe, characterized in that the opening 12 of the water conduit 11 is closed by screwing and tightening the plug 17.