KR200276761Y1 - F.r.p flange pipe - Google Patents

Abstract

The present invention relates to an FRP flange tube, the FRP flange tube of the present invention is a pipe, a flange formed at the end of the pipe and a groove (groove) is formed in the front, and inserted into the groove It is composed of a sealing member. Here, the sealing member is preferably O-ring (O-ring).

In addition, the flange is formed integrally with the pipe by reinforcing the thickness of the pipe, and by further installing a coupling ring for coupling the flange, it is semi-permanent to prevent damage due to deformation after installation, medium, high and ultra high pressure It can also be used as a dragon.

Description

F.R.P FLANGE PIPE}

The present invention relates to a F. F. flange pipe, and particularly relates to a F. F. flange pipe that can be used for excellent leakage preventing effect and ultra-high pressure.

In general, FRP (Fiberglass Reinforced Plastics) is formed by impregnating high-strength reinforcement mats such as glass fibers with thermosetting resins such as polyester, epoxy resins, and phenolic resins. It has excellent chemical properties and is widely used in the construction of building materials and pipes.

On the other hand, the flange pipe of the FRP material is produced by placing the processed pipe on the mold and impregnated a resin such as polyester or epoxy resin in glass fiber, repeatedly laminated to a desired thickness and demolded.

1 is a cross-sectional view showing a conventional F. R. flange flange tube, with two flange tubes (1) having an FRP flange (2) formed at an end thereof with the front face of the flange (2) in contact with each other. The flange tube 1 was connected by inserting and tightening a bolt (not shown) into the bolt hole 2a.

However, due to the characteristics of the FRP, in the process of manufacturing the FRP flange pipe (1) there was a disadvantage that the micro deformation occurs as the resin is hardened, which lowers the flatness of the front surface of the FRP flange (2), the gap in the front of the flange (2) in close contact with each other There was a problem that is likely to occur leaks or leaks.

Therefore, the conventional flat face FRP flange tube can be used only for low pressure and cannot be used for medium and high pressure.

In addition, in the front seat flange tube, the front face gasket 3 (see FIG. 2B) must be inserted between the flange tube 1 due to the deterioration of the flatness of the front face of the flange 2 described above, and maintain pressure tightness in the pipe. The torque value of the bolt should be increased in proportion to the pressure.

At this time, as the thickness of the gasket 3 is compressed around the bolt hole 2a by the tightening force of the bolt, a moment is generated in the neck 2b of the flange 2, which is a neck ( 2b) stressed the part and the part in contact with the bolt, if excessive, as shown in Figures 2a to 2b, there was a problem that the crack (4, 5) occurs.

In the case of the front seat type flange pipe, most of the cracks are generated by the moment as described above, and this is caused by the vibration and the stress in the continuous pipe, which leads to a deeper crack range, and ultimately leads to destruction.

In addition, the FRP flange tube has low strength, so it is easily damaged by bolt torque when joining a metal material, and when it is joined with a raised face flange, a special filler ring must be inserted. There was a feeling.

In spite of these problems, the current research and attention on the medium and high pressure FRP flanges in the industrial field of manufacturing FRP flange pipe is secondary and there is no significant technological progress. In addition, the manufacturing method of the flange tube did not escape the framework of uniformity, and domestic and overseas manufacturing methods are very similar.

Accordingly, the present invention is to provide a FRP flange tube that can complement and solve each of the above technical problems, to prevent the damage caused by deformation to FRP flange tube that can be used not only for low pressure but also for medium and high pressure The purpose is to provide.

Another object of the present invention is to provide a FRP flanged pipe which is fundamentally prevented from being damaged by the bolt tightening force and is excellent in stress resistance due to vibration and expansion in the piping system.

Another object of the present invention is to provide a FRP flange tube that can reduce the installation cost and reduce leakage due to local breakage, cracks and deformation of the flange.

Another object of the present invention is to provide a FRP flange tube that can be used at high pressure as well as medium and high pressure.

1 is a cross-sectional view showing a conventional F. R. flange flange tube.

(A) and (b) are sectional drawing which shows the example which a crack generate | occur | produced in the conventional F. P. flange pipe.

Figure 3 is a partial cross-sectional perspective view showing an F. R. F flange pipe for an embodiment of the present invention.

Figure 4 (a) to (d) is a cross-sectional view showing the manufacturing and installation process of one embodiment of the present invention.

Figure 5 is a partial cross-sectional perspective view showing a F. R. F flange tube of another embodiment of the present invention.

Figure 6 (a) to (e) is a cross-sectional view showing the manufacturing and installation process of another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: FRP flange pipe 11: pipe

12 flange 12a groove

12b: bolt hole 13: sealing member

14: mold 14a: protrusion

14b: projection 30: pipe

30a: Flange 31: Reinforcement mat

32: groove 33: O-ring

34: coupling ring 34a: bolt hole

35: Bolt

In order to achieve the above object, in the present invention, a FRP plan, comprising a pipe, a flange formed at an end of the pipe and having a groove formed on the front surface thereof, and a sealing member inserted into the groove. Provide branch offices.

The sealing member is characterized in that the O-ring (O-ring).

On the other hand, the flange is formed integrally with the pipe by reinforcing the thickness of the pipe.

Here, the pipe is characterized in that the filament winding pipe, it is preferable to stack a plurality of reinforcing mat for airtight on the front of the flange.

In addition, the coupling ring of the metal material for coupling the flange is further installed.

Hereinafter, with reference to the accompanying drawings an embodiment of the F. R. F flange tube of the present invention in detail as follows.

Figure 3 is a partial cross-sectional perspective view showing an F. R. F flange pipe for an embodiment of the present invention, one embodiment of the FRP flange pipe 10 of the present invention is a pipe like the conventional front seat flange pipe And a flange 12 formed at an end of the pipe 11, and a groove for inserting a sealing member 13 (see FIG. 4) into the front surface of the flange 12 ( 12a) is formed.

Here, the pipe 11 is a conventional filament winding pipe, the sealing member 13 can be applied in various ways, in the present invention used an O-ring (O-ring).

4 (a) to (d) show the fabrication and installation process of an embodiment of the present invention, the protrusion 14a for forming the groove 12a on the pre-processed filament winding pipe 11. ) Is inserted into the mold 14 including, and repeatedly laminated the reinforcing glass fiber and resin.

At this time, the mold 14 is formed with a protrusion 14b meeting the prescribed dimensions in order to facilitate the processing of the bolt hole 12b after the flange 12 is manufactured.

After the resin is completely cured, as shown in FIG. 4B, the flange tube 10 is demolded from the mold 14.

Thereafter, the O-ring 13 is inserted into the groove 12a and placed in contact with the mating flange 20 to be assembled, and then assembled by inserting the bolt 15 into the bolt hole 12b. {Fig. 4 (d)}

In this case, the o-ring 13 is sealed at the front surface of the flanges 12 and 20 which are in contact with each other, thereby preventing leakage or leakage.

Therefore, the conventional FRP flange pipe used for low pressure can also be used for medium pressure.

In addition, since cracks and fractures around the neck and bolt holes of the flange can be solved and excessive bolting can be avoided, the flange fracture phenomenon can be prevented.

5 is a partial cross-sectional perspective view showing an F.R.fl flange tube for an ultra-high pressure according to another embodiment of the present invention, wherein the flange 31 is integral with the pipe 30 by reinforcing the thickness of the filament winding pipe 30. Produced by

6 (a) to (e) is a cross-sectional view showing the manufacturing and installation process of another embodiment of the present invention, when explaining the method of manufacturing such an integrated FRP flange tube as follows.

Before the resin is cured on the pipe 30 manufactured by the filament winding method, the flange 30a is integrally formed with the pipe 30 by reinforcing the thickness with a filament winding machine.

After the flange 30a is completely hardened, it is demolded from the pipe mold and cut using a good grinder. {FIG. 6 (b)}

The cut-in integral FRP flange tube is processed using a lathe to process the neck and outer diameter of the flange 30a. {FIG. 6 (c)}

At this time, a plurality of sheets of reinforcing mat 31 are laminated and coated together with the resin on the entire surface of the flange 30a in order to completely remove the lifting phenomenon or leakage caused by bubbles on the surface of the flange 30a. (D) of FIG.

The reinforcing mat is a glass fiber mat, and it is preferable to laminate two sheets.

After fully cured, the groove 32 into which the O-ring, which is a sealing member, can be inserted, is processed according to the prescribed dimensions, and the flange 30a front surface is constantly finished with an air grinder.

When assembling the completed integral flange tube in this way is inserted into the groove (32) O-ring 33 and the coupling ring 34 for coupling the flange tube is installed on the flange (30a).

A bolt hole 34a is formed in the coupling ring 34. The bolt 35 is coupled to the bolt hole 34a to complete the assembly of the flange tube.

Here, the coupling ring 34 is preferably made of a material having a strong strength, and most preferably, a metal material.

Another embodiment of the present invention as the pipe 30 and the flange (30a) is formed integrally and the front surface of the flange 30a smoothly processed, so the gap between the flanges due to the flatness of the flange front surface pointed out as a conventional problem is It can prevent leakage or leakage. Therefore, it can be used also for ultra high pressure.

In addition, since the flange is assembled using a separate coupling ring without directly forming a bolt hole in the flange, it is possible to fundamentally prevent cracks in the neck of the flange due to the tightening force of the bolt.

As described above, the F.R.fl flange tube according to the present invention can be used not only for medium and high pressures but also for high and high pressures by preventing leakage due to excellent leakage preventing effect and deformation.

Specifically, the medium pressure can be used at 50 bar, the ultra high pressure can be used at more than 200 bar, it is semi-permanent without deformation and damage after installation.

By using a metal coupling ring to join, it is safe to connect with a material with higher strength than the FRP flange, and it is possible to pursue a simple and stable system regardless of the shape of the flange surface to be connected.

It also fundamentally prevents the flanges from being broken by the tightening bolts and is effective in stress resistance due to vibration and expansion in the piping system.

Claims (7)

With pipes, A flange formed at an end of the pipe and having a groove formed on the front surface thereof; FRP flange tube, characterized in that consisting of a sealing member inserted into the groove. The FRP flange tube of claim 1, wherein the sealing member is an O-ring. The FRP flange tube of claim 1, wherein the flange is integrally formed with the pipe by reinforcing the thickness of the pipe. According to claim 1 or claim 3, before the resin of the pipe is hardened to form a flange by reinforcing the thickness, and when the flange is completely cured, the pipe is demolded from the mold to reinforce the thickness formed by cutting the flange center portion of the flange A FRP flange tube characterized by processing a neck and an outer diameter, laminating a plurality of reinforcing mats on the flange front, and processing the grooves. The FRP flange tube according to claim 3, wherein a plurality of reinforcing mats for airtightness are laminated on the front surface of the flange. The FRP flange tube according to claim 3, further comprising a coupling ring having a bolt hole for engaging the flange. The FRP flange tube of claim 6, wherein the coupling ring is made of metal.