JP2805007B2 - Branch saddle device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saddle device for branching, which is used when a branch conduit is mounted on a water distribution pipe for water supply, sewerage or the like.

[0002]

2. Description of the Related Art In general, a metal water distribution pipe main body, a branch tap, and a branch pipe are buried in the ground and used, so that they are corroded by long-term use, thereby causing a problem of tap water sewage.

As a countermeasure, in recent years, there has been a tendency to use a large amount of stainless steel stoppers and saddles.

Conventionally, as shown in FIG. 7, for example, a branch saddle device used for attaching a branch tap to a water distribution pipe is known.

[0005] This includes a saddle 10 divided vertically.
1 and 102 are fastened with bolts 103 and nuts 104 across the water pipe 109, and the upper saddle 101 is provided with a branch extraction hole 10.
5 and an inner surface of the upper saddle, an O-ring groove 106 is provided around a branch taking-out hole 105 on a contact surface with a surface of a water distribution pipe 109, and an O-ring 107 is attached. Are diverted and removed.

[0006]

However, in the above prior art, since the upper and lower saddles 101 and 102 are in contact with the water pipe 109, for example, the saddle is made of stainless steel and the water pipe is made of ductile cast iron. If it is made, in the material, due to the difference in ionization tendency,
Alternatively, there has been a problem that corrosion is likely to occur at unexpected positions.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a branch saddle device for preventing corrosion of a contact portion between a saddle and a water pipe or an unexpected metal portion. Make it an issue.

[0008]

In order to solve the above-mentioned problems, a branch saddle device according to the present invention is a branch saddle used for connecting a water distribution hole at an upper part of a water distribution pipe to a branch water pipe. A non-conductive insulating sheet is attached between the inner surface and the surface of the water pipe , and the insulating sheet
There are multiple discontinuous small spaces on at least one side of
It is formed to prevent water leakage from the water distribution pipe .

[0009]

[Function] Since a non-conductive insulating sheet is interposed between the inner surface of the saddle and the surface of the water distribution pipe, there is no direct contact between the saddle and the water distribution pipe. Therefore, corrosion is less likely to occur at the contact portion between the saddle and the water pipe and at an unexpected metal portion. In addition to this
When multiple discontinuous small spaces are formed on the insulation sheet
Water leakage from the distribution pipe due to the so-called labyrinth effect
And this effectively stop is possible.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a structure in which a branch tap 2 is attached to a water pipe 1 made of ductile cast iron, and a water pipe 3 as a main pipe is provided with a water distribution hole 3 above. .

Upper and lower saddles 4 and 5 made of stainless steel are provided at upper and lower portions of the water distribution pipe 1.
A non-conductive insulating sheet 6 made of resin, for example, is adhered to the inner surface of the upper and lower saddles 4. Have been.

The upper and lower saddles 4 and 5 and the insulating sheet 6 are coated with an adhesive on the inner surfaces of the upper and lower saddles 4 and 5 to form the insulating sheet 6.
Is attached at the factory in advance. The insulating sheet 6 is made of a highly water-resistant material made of styrene butadiene rubber (SBR).
Nitriles can be substituted.

A water pipe mounting hole 10 is formed in the upper part of the upper saddle 4, and a female screw part 11 is formed in the inside thereof. The branch tap 2 is fixed to the upper saddle 4 by screwing the male thread 13 of the branch water pipe 12 of the branch tap 2 into the female thread 11.

In the branch saddle device of the first embodiment configured as described above, the inner surfaces of the upper and lower saddles 4 and 5 and the water pipe 1
Since, for example, an insulating sheet 6 made of resin and a packing 7 for separating the upper and lower saddles 4 and 5 from the water distribution pipe 1 are provided between the upper and lower saddles 4 and 5, there is a direct contact portion between the saddle and the water distribution pipe. Since there is no longer any flow of electrons between the two, the corrosion of the contact portion between the saddle and the water pipe is unlikely to occur.

In this embodiment , the packing 7 is provided so as to surround the water hole 3.
It may be extended to the periphery to surround the water diversion hole 3. According to this, the packing 7 can be omitted, and the number of partial crystals can be reduced.

FIGS. 2 and 3 show details of the insulating sheet 6.
A fine view is shown, which contacts the water pipe 1 of the insulating sheet 6 made of resin.
A discontinuous small space 14 is formed on the surface to be formed.

According to this, water leakage that cannot be prevented only by the packing 7, that is, water leaking from a gap between the water distribution pipe 1 and the saddle can be prevented by the small space 14 provided in the insulating sheet 6 . Because the insulation sheet
6 is adhered to the inner surfaces of the upper and lower saddles 4 and 5 with an adhesive, and the surface having the small space 14 has a sufficient sealing function for the water distribution pipe 1, that is, a labyrinth effect.
It is.

The small space 14 may be formed on the surface of the insulating sheet 6 in contact with the upper and lower saddles 4 and 5, or may be formed on both surfaces of the insulating sheet 6 in contact with the upper and lower saddles 4 and 5 and the water distribution pipe 1.

As shown in FIG. 4, the small space 14 may be formed by integrally forming the projections 15 on the insulating sheet 6 in a mesh form. As shown in FIG. 5, a resin net 15a is formed separately. The net 15a may be bonded to the insulating sheet 6a with an adhesive or the like.

Further, in FIG. 6, there is shown a second embodiment of the present invention, which is a peripheral portion of the diversion hole 3 of the insulating sheet 6, and a relatively thick annular portion 7 ', at least The annular portion 7 'is formed of an elastic material so as to perform a sealing function. With this configuration, a sufficient function of the packing at this portion, that is, a function as a seal can be further improved.

Although the embodiment has been described with reference to the drawings, the specific configuration is not limited to the embodiment, and any change or addition without departing from the gist of the present invention is included in the present invention. It is.

[0023] For example, in the embodiment, the insulating sheet 6, 6
Although one layer was used as a, a layer having two layers of a soft resin layer and a hard resin layer and having strength may be used.

[0024]

As described above, according to the present invention, since a non-conductive insulating sheet is interposed between the inner surface of the saddle and the surface of the water pipe, the direct connection between the saddle and the water pipe is made. Is no longer present, and electrons do not flow between them, so that corrosion is less likely to occur at the contact portion between the saddle and the water pipe and at an unexpected metal portion. In addition to this, insulation
Because multiple discontinuous small spaces are formed in the sheet,
Effect of water leakage from water distribution pipes with labyrinth effect
It is possible to stop it.

[0025]

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a saddle device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of an insulating sheet according to the first embodiment of the present invention.

FIG. 3 is a sectional view of a main part of the saddle device according to the first embodiment of the present invention.

FIG. 4 is an enlarged view of a main part showing an embodiment of the insulating sheet according to the first embodiment of the present invention.

FIG. 5 is an enlarged view of a main part showing another embodiment of the insulating sheet of the first embodiment of the present invention.

FIG. 6 is a sectional view of a main part of a saddle device according to a second embodiment of the present invention.

FIG. 7 is a sectional view of a main part of a conventional saddle device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water distribution pipe 2 Branch tap 3 Water hole 4 Upper saddle 5 Lower saddle 6, 6a Insulation sheet 7 Packing 8 Bolt 9 Nut 10 Water pipe installation hole 11 Female screw part 12 Water pipe 13 Male screw part 14 Small space 15 Convex part 15a network

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A Sho 53-99857 (JP, U) JP 3-49353 (JP, Y2) (58) Fields surveyed (Int. Cl. ⁶ , DB name) E03B 7/00 F16L 41/06

Claims (3)

(57) [Claims] 1. A branch saddle used for connecting a water distribution hole at an upper part of a water distribution pipe to a branch water pipe, wherein a non-conductive insulating sheet is provided between an inner surface of the saddle and a surface of the water distribution pipe.
Being attached, at least one of the insulating sheets
A plurality of discontinuous small spaces are formed on one of the surfaces,
Branch saddle characterized by preventing water leakage from the water pipe
apparatus. 2. The discontinuous small space is formed by a mesh-like convex portion.
The branch saddle according to claim 1, wherein the branch saddle is provided.
apparatus. 3. The insulating sheet according to claim 1, wherein a periphery of the water dividing hole has an annular thickness.
It is formed as a thick part, and at least the thick part is made of elastic material.
The branch saddle device according to claim 1 or 2, wherein: