JPH0580741U - Laminated flange - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a laminated flange 2 in which a reinforcing plate is not exposed on the inner surface of a bolt hole and strength is not reduced. [Structure] A laminated flange 2 in which a fiber-reinforced thermosetting resin layer 4 and a reinforcing layer made of a reinforcing plate 3 having a plurality of holes 7 are laminated on a flange 2a of synthetic resin, and a plurality of bolt holes 6 are provided. The sealing member 8 having a predetermined thickness is arranged on the inner circumference of the hole 6 of the reinforcing plate to form a part of the bolt hole 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flange having a reinforced flange portion which is mainly used in a plant field.

[0002]

[Prior Art]

 Conventionally, as a synthetic resin pipe used in a plant field or the like, there is an FRP reinforced synthetic resin pipe having an outer layer reinforced with a fiber reinforced thermosetting resin (hereinafter abbreviated as FRP), and this pipe should be flange-connected. There are many. As a flange used for such flange connection, as shown in FIG. 6, for example, a hard vinyl chloride resin flange 2a is fusion-bonded to the end of the hard vinyl chloride resin pipe 1, and the joint surface 20 of this flange 2a is joined. The FRP layer 4 is laminated on the outer surface except the iron reinforcing plate 13 having the holes 17 therein, and the laminated flange 2 having the bolt holes 6 is used.

[0003]

[Problems to be solved by the device]

 By the way, when the FRP layer 4 is laminated with the reinforcing plate 13 made of iron interposed therein, it is difficult to uniformly arrange the reinforcing fibers in the holes 17, and in particular, the vicinity of the holes 17 is likely to be only resin. Therefore, when the bolt hole 6 is provided after the FRP layer 4 is laminated, there is a risk that the reinforcing plate 13 is exposed on the inner surface of the bolt hole 6 due to chipping, peeling, or the like near the hole 17. When the reinforcing plate 13 is exposed on the inner surface of the bolt hole 6, when the corrosive fluid leaks from the inside of the pipe body, the reinforcing plate 13 made of iron is corroded and the strength of the laminated flange 2 is reduced.

In view of the above points, an object of the present invention is to provide a laminated flange in which the reinforcing plate is not exposed on the inner surface of the bolt hole and the strength does not decrease.

[0005]

Means for Solving the Problems The laminated flange of the present invention comprises a synthetic resin flange laminated with a fiber-reinforced thermosetting resin layer and a reinforcing layer formed of a reinforcing plate having a plurality of holes, and a plurality of layers are laminated. A laminated flange provided with bolt holes, characterized in that a sealing member having a predetermined thickness is arranged on the inner periphery of the holes of the reinforcing plate to form a part of the bolt holes. Is.

As the synthetic resin, a thermoplastic resin such as a hard vinyl chloride resin can be preferably used. It is desirable to use a metal such as iron as the material of the reinforcing plate. The material of the seal member may be any material having good corrosion resistance, and for example, vinyl chloride resin, fiber reinforced thermosetting resin, polyester resin, fluorine resin, rubber, or highly corrosion resistant metal such as titanium can be used. it can. The holes in the reinforcing plate are preferably circular holes, but not necessarily circular holes. The shape of the seal member may be any shape and structure as long as it can reliably seal the bolt hole of the reinforcing plate. Further, bolt holes may be formed in the seal member in advance. If it is not opened, marking the center is convenient for drilling with a drill. If the seal member and the reinforcing plate are adhered to each other with a primer or the like having an anticorrosion effect, the antirust effect can be further improved.

[0007]

[Action]

 The seal member arranged near the hole of the reinforcing plate seals the vicinity of the hole of the reinforcing plate. Further, this seal member eliminates chipping, peeling and the like in the vicinity of the holes of the reinforcing plate when the bolt holes are provided. As a result, the reinforcement plate is not exposed to the inner surface of the bolt hole, the corrosion of the iron reinforcement plate due to the corrosive fluid leaking from the inside of the pipe is prevented, and the deterioration of the flange strength due to the corrosion of the iron reinforcement plate is eliminated. ..

[0008]

【Example】

 The present invention will be described below with reference to the drawings showing an embodiment thereof. 1 to 5 are views showing an embodiment of a laminated flange of the present invention. FIG. 1 is a perspective view of an embodiment of the laminated flange of the present invention. Reference numeral 1 is a hard vinyl chloride resin pipe, 2 is a laminated flange, and 6 is a bolt hole provided in the laminated flange 2.

FIG. 2 is a sectional view of a main part of FIG. 1, and FIG. 3 is a sectional view taken along the line AA of FIG. A flange 2a made of a hard vinyl chloride resin is fused to the hard vinyl chloride resin pipe 1, and a plurality of bolt holes 6a are provided in advance in the flange 2a. The reinforcing plate 3 is a flange-shaped iron plate having substantially the same shape as the flange 2a, and holes 7 are provided at positions corresponding to the bolt holes 6 of the laminated flange 2. The hole 7 has a diameter larger than that of the bolt 6, and the seal member 8 is attached to the hole 7. The seal member 8 is made of rubber and has a shape in which an annular groove 16 is formed in the center of a cylindrical body. The groove 16 has a width and a depth that allow it to be fitted into the hole 7 of the reinforcing plate 3.

The laminated flange of the present invention is formed as follows. The recessed grooves 16 of the plurality of seal members 8 are fitted into and attached to the plurality of holes 7 of the reinforcing plate 3, respectively. After the FRP layer 4 is laminated on the flange 2a, the reinforcing plate 3 having the seal member 8 mounted thereon is placed on the FRP layer 4, and the FRP layer 4 is laminated on the outer peripheral surface of the flange 2a excluding the joint surface 20. After that, the bolt holes 6 are opened to form the laminated flange 2.

FIG. 4 is a perspective view of an example of a seal member that can be used in the present invention. FIG. 4a is a perspective view of a seal member having no bolt holes, and FIG. 4b is a perspective view of an example of a seal member having bolt holes. An annular groove 16 is formed in the center of the cylindrical body of each of the seal members 8 and 9. The use of the seal member 9 having the bolt hole has an advantage that it is not necessary to make a hole in the seal member in the post processing. The shape of the heads of the seal members 8 and 9 does not necessarily have to be circular, but may be square, hexagonal or the like.

FIG. 5 is a cross-sectional view of an essential part of another embodiment of the laminated flange of the present invention. Reference numeral 11 is a reinforcing plate in which the periphery of the hole 15 is formed thin, and 12 is a sealing member attached to the hole 15. Both side surfaces of the reinforcing plate 11 and both side surfaces of the seal member 12 are formed on the same plane. By using the seal member 12 and the reinforcing plate 11 as described above, since the side surfaces are formed on the same plane, it becomes easy to stack the FRP.

[0013]

[Effect of the device]

 The seal member arranged near the hole of the reinforcing plate can seal the vicinity of the hole of the reinforcing plate, and this seal member prevents chipping or peeling of the reinforcing plate near the hole when the bolt hole is opened. Since it can be eliminated, the reinforcement plate is not exposed to the inner surface of the bolt hole, the corrosion of the iron reinforcement plate due to the corrosive fluid leaking from the inside of the pipe is prevented, and the flange strength is reduced due to the corrosion of the reinforcement plate. Can be prevented.

[0014]

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a laminated flange of the present invention.

FIG. 2 is a cross-sectional view of the main parts of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

4A and 4B are perspective views of an example of a seal member that can be used in the present invention, where FIG. 4A is a seal member having no bolt holes, and FIG. 4B is a seal member having bolt holes.

FIG. 5 is a cross-sectional view of an essential part of another embodiment of the laminated flange of the present invention.

FIG. 6 is a sectional view of a main part of a conventional laminated flange.

[Explanation of symbols]

 1 Hard Vinyl Chloride Resin Pipe 2 Laminated Flange 2a Flange 3,11,13 Reinforcement Plate 4 FRP Layer 6,6a Bolt Hole 7,15,17 Hole 8,9,12 Sealing Member 16 Recessed Groove

Claims (1)

[Scope of utility model registration request] 1. A laminated flange in which a fiber reinforced thermosetting resin layer and a reinforcing layer made of a reinforcing plate having a plurality of holes are laminated on a synthetic resin flange, and a plurality of bolt holes are provided. A laminated flange, wherein a sealing member having a predetermined thickness is arranged on the inner periphery of the hole of the reinforcing plate to form a part of the bolt hole.