JPS6047092B2 - Reinforced resin pipe for flange connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reinforced resin pipe suitable for use when connecting using flanges.

Conventionally, as a reinforced resin pipe for flange connection, for example, as shown in FIG.
Date = ゛, Same,,゛''! Knee ,,゜1, n Fit 1' and wrap and fix the molding material 3' from the socket 21' to the end of the headless tube 1' using a hand wrap. However, when the headless pipe 1' and flange 2' are not fixed together with sufficient strength, and when the flange is connected to another flanged reinforced resin pipe, the flange 2' is used for bolt connection. A drawback is that the connection work is difficult if the holes are not drilled in convenient locations for connection.
The present invention has been made for the purpose of solving the conventional drawbacks as described above, and its gist is that a plurality of protruding pieces are provided on the side of one end, and the inner and outer surfaces of the protruding pieces are uneven. A cylindrical body having a convex portion on the outside of the other end is attached to a reinforced resin tube by being embedded in the tube wall with the protruding piece reduced in diameter, and the cylindrical body is attached to the reinforced resin tube. This invention resides in a reinforced resin pipe for flange connection in which an annular flange can be locked to a convex portion of the body. Next, the reinforced resin pipe for flange connection of the present invention will be explained with reference to embodiments shown in the drawings.

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention;
2 and 3 are partially cutaway perspective views of a cylindrical body and an annular body used in the embodiment of FIG. 1, respectively.

1 is a reinforced resin pipe, and an outer surface reinforcement layer 12 is provided on an inner surface reinforcement layer 11.

Reference numeral 2 is a cylindrical body, which has a connecting part 22 provided with a plurality of protruding pieces 221 on the side of one end of the main body 21, and a spiral uneven part 222 on the inner and outer surfaces of the connecting part 22. A convex portion 23 is provided on the outside of the other end of the main body 21 along the circumferential direction, and the outer peripheral surface of the convex portion 23 has a tapered surface 231 whose diameter gradually increases toward the edge. It is said that

3 is an annular flange having a plurality of bolt insertion holes 3;
1 .

The cylindrical body 2 has a connecting portion 22 sandwiched between the inner and outer reinforcing layers 11 and 12 at one end of the reinforced resin pipe 1, and a plurality of protruding pieces 221...
The projecting pieces 21, 221 and 221 are covered with molding material.
... is reduced in diameter, the uneven parts 22 provided on the inner and outer surfaces of the protruding piece are bitten into the inner and outer reinforcing layers 11 and 12, and the end of the inner reinforcing layer 11 is bent to form a curved contact part. 11
1, the curved contact portion 111 is fixed to the outer surface of the main body 21, and the inner and outer reinforcing layers 11 and 12 are integrally hardened.

The annular flange 3 is locked to the convex portion 23 of the cylindrical body 2 so that the respective tapered surfaces 231 and 32 are in contact with each other.

In this way, the protruding pieces 221, 221... of the cylindrical body 2 are embedded in the tube wall of the reinforced resin pipe 1 in a state where the diameter is reduced, and the uneven parts 222 provided on the inner and outer surfaces of the protruding pieces are reinforced. It effectively bites into the tube wall of the resin tube 1, and the cylindrical body is firmly fixed.

Further, since the annular flange 3 is locked to the convex portion 23 of the cylindrical body 2, it has sufficient connection strength. Moreover, when making a flange connection to another reinforced resin pipe, the annular flange can be appropriately rotated to easily position the bolt connection hole of the flange. In addition, the pipe wall of the reinforced resin pipe has resin mortar in the middle! The cylindrical body may be provided with an intermediate layer such as the like, and a reinforcing layer provided on at least the inner and outer layers is preferable because the cylindrical body can be firmly fixed.

Further, it is preferable that the end of the inner layer of the tube wall is bent and fixed to the outer surface of the main body 21, as in the above-mentioned embodiment, because the fixation of the cylindrical body becomes even stronger. Next, a method for manufacturing the reinforced resin pipe for flange connection shown in FIG. 1 will be explained with reference to the drawings. 4 and 5 are partially cutaway front views illustrating the manufacturing process. The cylindrical body 2 with the annular flange 3 fixed to the convex part 23 is fitted onto one end of the core mold 4, and a reinforced resin molding material is wound on the core mold 4, leaving the part where the cylindrical body 2 is fitted. The inner reinforcing layer 11 is formed by rotating the inner reinforcing layer 11 (see FIG. 4), and the cylindrical body 2, which has been previously fitted onto one end of the core mold 4, is slid onto one end of the inner reinforcing layer 11 to cover it.
Using a hand wrap, apply the reinforced resin molding material from the connecting portion 22 onto the inner reinforcing layer 11 on the protruding pieces 221 and 222 of the connecting portion.
The outer reinforcing layer 12 is formed by applying a winding tension such that the outer reinforcing layers 11 and 12 reduce the diameter of the plurality of protruding pieces 221. The surroundings are covered with molding material, the end of the inner reinforcing layer 1 is bent and fixed to the outer surface of the main body 21 at the bent part 111 (see Fig. 5), and after this is integrally cured, the core mold 4 is It is removed and a reinforced resin pipe for flange connection is manufactured. In addition, flange 3
may be fitted during connection.

Further, if the core mold 4 is supported at least at one end and is rotatable, it is easy to wind the molding material around it.
In addition, since the inner and outer surfaces of the protruding pieces 221 are uneven, it is easy to wrap the molding material and fix the protruding pieces 221... It is preferable that the tube is bent in a direction and fastened to the outer surface of the cylindrical body 2 because the cylindrical body can be fixed more firmly. As mentioned above, the reinforced resin pipe for flange connection of the present invention is provided with a plurality of protruding pieces on the side of one end, and the inner and outer surfaces of the protruding pieces are uneven surfaces,
A cylindrical body with a protrusion on the outside of the other end is attached to the reinforced resin pipe by being embedded in the tube wall with the protruding piece reduced in diameter. The surface is anchored into the pipe wall, and the cylindrical body is firmly fixed to the reinforced resin pipe.

In addition, since the annular flange is secured to the convex part of the cylindrical body, it has sufficient connection strength, and when connecting other reinforced resin pipes with the flange, etc., the bolts of the annular flange Connection work can be easily performed by rotating the annular flange until the connection hole is in a convenient position for connection.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the reinforced resin pipe for flange connection of the present invention, Fig. 2 is a partially cutaway perspective view showing an example of the cylindrical body used in the present invention, and Fig. 3 is a partially cutaway front view showing an example of the reinforced resin pipe for flange connection of the present invention. A partially cutaway perspective view showing an example of an annular flange, FIGS. 4 and 5 are partially cutaway front views illustrating the process of manufacturing a reinforced resin pipe for flange connection, and FIG. 6 shows a conventional one. It is a partially cutaway front view for explanation. Explanation of symbols, 1... Reinforced resin pipe, 2... Cylindrical body, 3
... annular flange, 4 ... core type, 11 ... inner surface reinforcement layer, 12 ... outer surface reinforcement layer, 21 ... main body, 22.
...Connection part, 23...Protrusion part, 111...Bending part, 2
21... Projection piece, 222... Uneven part.

Claims (1)

[Claims] 1. A cylindrical body in which a plurality of protruding pieces are provided on the side of one end, the inner and outer surfaces of the protruding pieces are roughened, and a convex portion is provided on the outside of the other end. A reinforced resin pipe for flange connection, which is attached to a resin pipe by embedding the projecting piece in a reduced diameter state in the pipe wall, and allowing an annular flange to be locked to a convex portion of the cylindrical body. 2. The reinforced resin pipe for flange connection according to claim 1, wherein the outer circumferential surface of the convex portion of the cylindrical body is a tapered surface whose diameter gradually increases toward the end edge. 3. A reinforced resin pipe for flange connection according to claim 1 or 2, wherein the pipe wall is provided with at least inner and outer layers. 4. A reinforced resin pipe for flange connection according to claim 1, 2 or 3, wherein the end of the inner layer of the pipe wall is bent and fixed to the outer surface of the cylindrical body.