JPH0755436Y2 - Branch fitting for lining pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a branch joint of a lining pipe, and more particularly to a branch joint of a lining pipe for making a hole in the lining pipe and branching therefrom.

[Prior art]

As shown in FIGS. 3A and 3B, a branch joint 1 for a conventional lining pipe includes a half-split joint body 2 made of cast iron and a hollow disc-shaped packing 3.

Then, in order to attach the branch joint 1 to the lining pipe 5 whose outer layer 4 is made of metal, the joint main body 2 is arranged according to the hole 6 of the lining pipe 5, and the packing is provided between the joint main body 2 and the lining pipe 5. Screw with 3 inserted.

[Problems to be solved by the device]

In the branch joint 1 thus mounted, the end surface 7 of the hole 6 and the inner surface 8 of the joint body 2 are exposed. Therefore, the end surface 7 and the inner surface 8 on the outer layer 4 side come into contact with the internal fluid flowing in the lining pipe 4 to cause rusting.

Therefore, a main object of the present invention is to provide a branch joint for a lining pipe which does not rust on the end face of the hole or the like.

[Means for Solving the Problems]

This invention is a branch joint of a lining pipe for forming a branch in a lining pipe and branching the joint, wherein the joint main body is fixed at the position of the hole, and is inserted between the joint main body and the lining pipe. A packing with a collar formed so as to cover the end face,
A branch joint for a lining pipe, comprising: a lining resin formed so as to cover the inner surface of the joint body and the inner surface of the flanged packing.

[Action]

The flanged packing inserted between the joint body and the lining pipe seals the end surface of the hole formed in the lining pipe. In addition, the inner surface of the joint body and the inner surface of the flanged packing, which are made of metal such as cast metal, are covered with the lining resin. As described above, since the end surface of the hole and the joint body are covered with the corrosion-resistant material such as the collar packing and the lining resin, they are not directly exposed to the flow path and do not come into contact with the internal fluid flowing in the lining pipe.

[Effect of device]

According to this invention, the metal portion such as the end face of the hole and the joint body does not come into contact with the internal fluid flowing in the lining pipe, so that corrosion can be prevented and rusting unlike the conventional case does not occur.

The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments below with reference to the drawings.

〔Example〕

Referring to FIGS. 1A to 1C, the branch joint 10 of the lining pipe of this embodiment includes a joint body 12 formed of a metal such as cast iron. The joint body 12 is formed in a substantially hollow cylindrical shape, and includes a flange 14 that projects outward from a lower portion thereof.
A male screw 16 is formed on the outer surface of the joint body 12, and a flanged packing 18 having an L-shaped cross section, which is a corrosion-resistant material, is arranged on the lower surface of the collar 14 of the joint body 12. The space between the joint body 12 and the collar packing 18 and the joint body 12 and the collar packing
A lining resin 20, which is a corrosion resistant material, is formed on the inner surface of 18. The joint body 12, the flanged packing 18 and the lining resin 20 are integrated by an adhesive, for example. In addition,
A cylindrical space formed by the lining resin 20 serves as a branch passage 21.

Further, the branch joint 10 includes an annular band 22 for fixing the joint body 10 to the lining pipe 26, and a screw 24 is attached to the band 22.

The branch joint 10 configured in this way has an outer layer made of metal.
An inner layer 30 made of resin is lined on the inner surface of 28, and attached to a lining pipe 26.

First, the hole 32 is formed at an arbitrary position in the lining pipe 26 where branching is desired, for example, by a drill. The inner diameter of the hole 32 is
The packing 18 is formed so as to have a diameter substantially equal to the outer diameter of the packing 18. Then, the branch joint 10 is attached to the hole 32. At this time,
The flanged packing 18 arranged on the lower surface of the joint body 12 is inserted into the hole 32 so that the branch passage 21 and the hole 32 communicate with each other, and the end surface 34 of the hole 32 is sealed by the outer surface of the flanged packing 18. To do. Then, the joint body 12 is fixed to the lining pipe 26 by the band 22. It should be noted that the band 22 has a hole (not shown) formed in such a size that the upper portion of the joint body 12 projects.
When attaching 22, the upper part of the joint body (12) is projected from this hole to bring the band (22) into contact with the upper surface of the collar part (12) and surround the lining pipe (26). Then tighten the screw 24 and tighten the band 22
And the branch joint 10 is fixed to the lining pipe 26.

In the branch joint 10 thus mounted, the end surface 34 is sealed by the flanged packing 18, and the inner surface of the joint body 12 is covered by the lining resin 24. Therefore, metal parts such as the end surface 34 on the outer pipe 28 side and the inner surface of the joint body 12 do not come into direct contact with the internal fluid flowing in the lining pipe 26.

In the branch joint 40 of another embodiment shown in FIG. 2, the screw 44 is formed on the inner surface of the joint body 42, and the groove 48 is formed on the lining resin 46 formed on the inner surface of the joint body 42. The internal thread structure is used. Also in this branch joint 40, the same effect as in the previous embodiment can be obtained.

[Brief description of drawings]

1A to 1C are schematic views showing a state in which one embodiment of the present invention is attached to a lining pipe, and FIG. 1A is a sectional view,
FIG. 1B is a front view and FIG. 1C is a side view. FIG. 2 is a sectional view showing the main part of another embodiment of the present invention. 3A and 3B are schematic illustrations showing the prior art.
3A is a sectional view and FIG. 3B is a side view. In the figure, 10 and 40 are branch joints of lining pipes, 12 and 42 are joint bodies, 18 is a flanged packing, 20 and 46 are lining resins, 26 is a lining pipe, 28 is an outer layer, 30 is an inner layer, and 32 is a hole. Show.

Claims (1)

[Scope of utility model registration request] 1. A branch joint of a lining pipe for branching by forming a hole in the lining pipe, the joint main body being fixed at the position of the hole, and being interposed between the joint main body and the lining pipe. And a lining resin formed so as to cover the end surface of the hole and a lining resin formed so as to cover the inner surface of the joint body and the inner surface of the packing.