JPH06281064A - Pipelike body provided with flange - Google Patents

Abstract

PURPOSE:To provide a reinforced pipe provided with a flange, capable of sufficiently withstanding external force such as bolt fastening force. CONSTITUTION:A main body portion 11 is made of hard vinyl chloride resin, and wherein a collar part 112 is provided on the end of a pipe body 111. A reinforcing layer 16 made of fibrous glass reinforced unsaturated polyester resin is provided on the back surface of the collar part 112 from the outer peripheral surface of the pipe body 111 of the main body portion 12 through a metallic core member 14 formed by a collared short pipe. A protruded part 12 is provided on the outer peripheral surface of the pipe body 111, and the top end of the short pipe 141 of the core member 14 is bent and locked on the protruded part 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flanged pipe and a flanged tubular body such as a flanged pipe, which is mainly used in the fields of factory laying, machinery, ships, vehicles, power plants and the like.

[0002]

2. Description of the Related Art Conventionally, the diameter of synthetic resin pipes used in the fields of factory facilities, machinery facilities, ships, vehicles, power plants, etc. is generally large, and the transportation fluid is, for example, high temperature chemical liquid. There are many dangerous goods. Moreover, since the pipes are used under relatively severe conditions such as long-term exposure to the outside air, pipes and joints having excellent corrosion resistance and high strength are required.

For this purpose, a so-called composite pipe having a hard synthetic resin as an inner layer and a reinforcing layer made of a fiber reinforced synthetic resin as an outer layer is used. When the pipes are connected to each other or to valves or other devices, a connection method using a flange is often used. In this method, a flange is provided in advance in the connection part of the pipe or equipment, or a pipe joint with a flange is used to connect with a bolt and nut. Those reinforced with a reinforced synthetic resin are used.

For example, FIG. 3 is an example of a flanged pipe joint, and is a cross-sectional view with the left half omitted.
In order to make this, first, a flange portion b made of the same synthetic resin, which is separately manufactured by injection molding, is attached to one end of a tubular body a made of a synthetic resin short tube, which is cut to a fixed length, by a synthetic resin welding method. The main body portion c is formed by integrally bonding.

Next, a spray-up method of spraying a glass chop and a curable resin from the outer peripheral surface of the tubular body a to the back surface of the collar portion b of the main body c, or a curable resin on a glass fiber cloth or a non-woven fabric. The reinforcing inner layer d made of fiber reinforced synthetic resin is formed by a hand-up method of impregnating and laminating.

Next, when the reinforcing inner layer d is substantially hardened, a metal core material e made of a short pipe with a collar having a diameter larger than that of the tubular body a prepared in advance is inserted, and thereafter, the reinforcing inner layer d. The reinforced outer layer f is formed using the same material as the above in the same manner. In addition, g, g
Is a weld.

This metal core material e is inserted to reinforce the welded portion, and in the case of a large-diameter pipe body, even if there is a block-shaped pipe joint, the injection molding method is used. In many cases, they cannot be integrally formed, and after they are separately manufactured as described above, they are often integrated by the welding method as described above.

[0008]

By the way, as the metal core material e, a metal having a relatively high rigidity such as cast iron, steel or alloys thereof is mainly used. The metal core material e and the fiber reinforced synthetic resin are used. The reinforced inner layer d and the reinforced outer layer f are
Originally it has poor adhesiveness, and due to shrinkage during curing of the reinforcing inner layer d and the reinforcing outer layer f made of fiber reinforced synthetic resin, the difference in the coefficient of thermal expansion between the metal core material e, and the like, the metal core material e is reinforced. A gap h is likely to occur between the inner layers d or between the metal core material e and the reinforcing outer layer f.

When such a gap h exists, the metallic core material e is loosely fitted. If the bolts are tightened in this state at the time of connection, there is a problem that a large shearing force is exerted on the welded portions g and g so that they are easily broken. Even if the metal core material e is not loosely fitted, if the tension of the bolt tightening is too strong, the metal core material e is deformed due to the elasticity of the metal, and the original reinforcing effect is lost. The welded parts g and g with c may be destroyed.

The present invention has been made for the purpose of solving the above-mentioned problems of the prior art and providing a reinforced flanged tubular body capable of sufficiently withstanding an external force such as bolting.

[0011]

The present invention comprises a short tube with a collar extending from the outer peripheral surface of the tubular body to the back surface of the collar portion of a synthetic resin main body portion having a collar portion provided at the end of the tubular body. A tubular body with a flange, in which a reinforcing outer layer made of fiber reinforced synthetic resin is provided via a metal core material, wherein a protrusion is provided on the outer peripheral surface of the tube body, and the protrusion has a short tube of the core material. Is a tubular body with a flange that is locked.

In the present invention, the main body portion is made of synthetic resin and has a structure in which the flange portion is provided at the end portion of the tubular body.
As the pipe body, a synthetic resin pipe, a fiber-reinforced synthetic resin pipe, a so-called composite pipe in which a reinforcing layer made of a fiber-reinforced synthetic resin is provided around an inner layer made of a synthetic resin, or the like is used. Examples of the synthetic resin include vinyl chloride resins such as polyvinyl chloride and chlorinated polyvinyl chloride, polyamide, acrylic resin, and polycarbonate. These synthetic resins may contain stabilizers and plasticizers.

The fiber-reinforced synthetic resin comprises a reinforcing fiber impregnated with a thermosetting resin. Examples of the fibers include rovings, cloths and mats made of glass fibers, carbon fibers, aramid fibers and the like. Examples of the thermosetting resin include unsaturated polyester resin, phenol resin, epoxy resin and the like.

As the synthetic resin forming the collar portion, the same synthetic resin as described above, fiber reinforced synthetic resin, or a synthetic resin plate having a reinforcing layer made of fiber reinforced synthetic resin on the back surface thereof is used. The main body may have a flange portion, which is separate from the tubular body, joined to the end portion of the tubular body by welding, fusion bonding, an adhesive, or the like, or may be integrally molded.

In the present invention, the core material is composed of a metal short tube with a collar, and a flange is provided at the end of the short tube. Usually, the short tube is provided at the end of the short tube. The one in which the collar portion that is separate from the above is joined by welding or the like is preferably used. Examples of the metal include steel, stainless steel, aluminum and the like.

In the present invention, the protruding portion provided on the outer peripheral surface of the tubular body of the main body is made of, for example, a resin material similar to that of the tubular body, and is a cylindrical body such as a cylindrical body, a ridge, or a large number of protrusions. Etc. are used. As a method of providing such a protruding portion on the outer peripheral surface of the tubular body, the protruding portion is provided on the outer peripheral surface of the tubular body of the main body,
Welding or fusing each other or joining them with adhesive,
Examples include a method of forming by integral molding and a method of performing post-processing.

In the present invention, the short tube of the core material is locked to the projecting portion of the main body, but the tip of the short tube is bent and locked to the projecting portion. Alternatively, it may be locked by a concavo-convex fitting provided on the outer peripheral surface of the tube body and the inner peripheral surface of the short tube, such as screwing, which involves rotation in the circumferential direction.

In the present invention, a reinforcing outer layer made of a fiber reinforced synthetic resin is provided from the outer peripheral surface of the body of the main body to the back surface of the flange with a metal core made of a short tube with a collar interposed therebetween. However, the short pipe with a collar may be buried in the reinforcing outer layer, or a part of the short pipe with a collar may be exposed.

In the present invention, in order to improve the adhesion to the core material and the reinforcing inner layer and the reinforcing outer layer, good adhesion is exhibited to both the core material and the reinforcing inner layer and the reinforcing outer layer, and the heat resistance, If necessary, a curable binder having excellent properties such as low temperature resistance can be used. Examples of the curable binder include epoxy acrylate resins obtained by reacting bisphenol type epoxy resin with methacrylic acid and the like, and a curing agent, a curing accelerator, a rust preventive agent, and the like. The cross-sectional shape of the tubular body constituting the flanged tubular body of the present invention is usually circular, but various shapes such as an oval oval shape and a polygonal shape close to a circular shape are targeted.

[0020]

In the tubular body with a flange of the present invention, a projecting portion is provided on the outer peripheral surface of the tubular body, and the short pipe of the core material is locked to the projecting portion, so that the bolting load acts on the main body portion. When this happens, the stress is received by the core material part where the short pipe is locked to the protruding part, so stress may be concentrated between the end part of the pipe body and the flange part and the part may be damaged. Absent.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing an example of the tubular body with a flange of the present invention with the right half omitted. Reference numeral 11 denotes a main body made of hard vinyl chloride resin, and a flange 112 is joined to the outer peripheral surface of one end of the tubular body 111 by welding 113. A bolt hole 114 is provided in the collar portion 112.

Reference numeral 12 denotes a protruding portion made of a hard vinyl chloride resin having a cylindrical body, which is a cylindrical body having an inner diameter substantially equal to the outer diameter of the tubular body 111. The protruding portion 12 is a tube body 11.
The outer peripheral surface of one end portion of No. 1 is bonded to a position adjacent to the portion where the collar portion 112 is provided with an adhesive.

Reference numeral 14 is a steel core material consisting of a short tube with a collar, and the short tube 1 has an inner diameter substantially the same as the outer diameter of the protruding portion 12.
The collar portion 142 is integrally joined to the outer peripheral surface of the base end portion of 41 by welding 143. Bolt holes 144 are provided at positions corresponding to the bolt holes 114 provided in the flange 112 of the main body 11 of the flange 142 of the core material 14.

As for the core material 14, the flange portion 142 of the core material 14 is the main body portion 11.
The bolt hole 144 is joined to the rear surface of the collar portion 112 of the main body portion 11 via the reinforcing inner layer 13 made of glass fiber reinforced unsaturated polyester resin so that the short pipe 141 is projected. The outer periphery of the portion 12 is capped and the tip thereof is bent inward and locked to the end portion on the center side of the protruding portion 12.

Reference numeral 15 is a putty material, which is made of glass chops or the like made of glass fiber impregnated with resin.
The short tube 141 is filled around the bent portion of the tip.

A reinforcing outer layer 16 made of a glass fiber reinforced unsaturated polyester resin is provided on the outer peripheral surface and end surface of the tubular body 11, putty material 15, brim short tube 14, and end surface of the brim portion 112 of the main body 11.
Are covered. Then, the reinforcing inner layer 13 and the putty material 1
5. The resin of the reinforcing outer layer 16 is integrally cured to form a flanged pipe.

Then, the bolt hole 114 of the main body portion 11 and the bolt hole 144 of the core material 14 are inserted, and the bolt is tightened between the opposite flanges to be flange-connected by a bolt (not shown). When acting on the portion 11, the stress is received by the portion of the core material 14 in which the short tube 141 is locked to the protruding portion 12, so that the tubular body 111 of the main body portion 11 is affected.
There is no possibility that stress concentrates between the end portion of the blade and the collar portion 112 and the portion is damaged.

An example of the method for manufacturing the above flanged pipe will be described below with reference to FIG. First, FIG. 2 (a)
As shown in, the main body 11 made of a hard vinyl chloride resin, in which the collar 112 is joined by welding to one end of the pipe 111,
From the other end side of the tubular body 111, the protrusion 12 made of a hard vinyl chloride resin, which is a cylindrical body, is moved and bonded to a position adjacent to the site where the collar 112 is provided with an adhesive.

Next, glass fibers are spread on the back surface of the collar portion 112 of the main body 11, and an unsaturated polyester resin is impregnated between the fibers by a coating roll.
As shown in (b), the reinforcing inner layer 13 is provided. After that, the core member 14 is moved toward the collar portion 112, and the collar portion 1
42 is joined to the back surface of the collar portion 112 via the reinforcing inner layer 13, and the short pipe 141 is crowned on the outer periphery of the protruding portion 12,
The tip portion is bent inward and locked to the end portion on the center side of the protruding portion 12.

A glass chop impregnated with an unsaturated polyester resin is filled around the side surface of the tip of the bent short tube 142. Finally, as shown in FIG. 2C, the tubular body 1
1. The putty material 15, the outer peripheral surface and the end surface of the brim short tube 14, and the end surface of the brim portion 112 of the main body portion 11 are coated with a reinforcing outer layer 16 made of glass fiber reinforced unsaturated polyester resin by a spray-up molding method. Reinforced inner layer 1
3, the putty material 15, and the unsaturated polyester resin of the reinforcing outer layer 16 are integrally cured to obtain the flanged tubular body of the present invention.

[0031]

Since the flanged tubular body of the present invention is constructed as described above, stress is concentrated between the end of the tubular body of the main body portion and the flange portion, and that portion is damaged. There is no such thing.

[0032]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a tubular body with a flange of the present invention with the right half omitted.

2 (a), (b), and (c) are cross-sectional views sequentially illustrating steps of an example of a method of manufacturing the flanged tubular body shown in FIG.

FIG. 3 is a cross-sectional view showing an example of a conventional flanged pipe joint with the left half omitted.

[Explanation of symbols]

 11 Main Body 12 Projection 13 Reinforcement Inner Layer 14 Core Material 15 Putty Material 16 Reinforcement Outer Layer 111 Tubular Body 112 Collar 113, 143 Welding 114, 144 Bolt Hole 141 Short Pipe 142 Collar

Claims (1)

[Claims] 1. A metal core material consisting of a short tube with a collar is interposed between the outer peripheral surface of the tubular body and the rear surface of the collar portion of a synthetic resin main body portion having a collar portion provided at an end portion of the tubular body. A flanged tubular body provided with a reinforcing outer layer made of fiber reinforced synthetic resin, wherein a protruding portion is provided on the outer peripheral surface of the tubular body, and the short tube of the core material is locked to the protruding portion. Features a tubular body with a flange.