JP2001271978A - Flexible pipe joint with companion flange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible pipe joint with a companion flange to be capable of performing mass production at a low cost. SOLUTION: A flexible pipe joint 10 comprises a pipe body 11 having flexible; flange parts 12 formed at the two end parts of the pipe body 11; flange mounting parts 13 situated axially internally of the respective flange parts 12; and a division type companion flange 11. A flange 22 of piping 20 and the companion flange 1 mounted on the flange mounting part 13 are fastened against each other by means of a bolt 25 and a nut 24 and flange connection is effected between the flexible pipe joint 10 and the piping 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible pipe joint having a companion flange.

[0002]

2. Description of the Related Art In water supply pipes laid in buildings and various facilities, flexible pipe joints having a relatively short pipe length are used when a pipe route is bent or when a pipe is attached to equipment. Is done. This flexible pipe joint is generally made of a flexible material having elasticity such as rubber, and the outer circumference of the pipe body in the axial cross section is usually formed in a corrugated (bellows) or chevron shape to increase flexibility. If pressure resistance is required, a tire cord such as nylon or polyester, or a reinforcing material such as a metal wire is embedded in the pipe body to prevent rupture or the like. Further, metal rings or the like for reinforcement may be buried at both ends of the pipe body, that is, at a connection portion with the pipe.

[0003]

A conventional flexible pipe joint is generally connected to a pipe by a flange, so that a companion flange is provided at each end of the pipe joint. And are integrally formed. However, in order to integrally form the pipe main body and the companion flange, there is a problem that a mold is complicated, and a molding failure is apt to occur, so that a skilled worker is required and the cost is high. Therefore, the present invention aims to solve such a problem,
It is an object of the present invention to provide a new flexible flanged fitting with a companion flange.

[0004]

According to the first aspect of the present invention, there is provided a tube body 11 having flexibility, flange portions 12 formed at both ends of the tube body 11, and Flange mounting portion 13 provided axially inside flange 12
And a split-type companion flange 1 having a split surface in the radial direction and mountable on each of the flange mounting portions 13, wherein the companion flange 1 includes a pair of arc-shaped flange pieces 2.
And thin portions 4, 5 provided at both ends of each flange piece 2,
A connecting member 9 for connecting the flange pieces 2 is provided, and the thin portions 4 and 5 provided at both ends of each flange piece 2 are overlapped with each other to make the companion flange 1 having a constant circumferential thickness.
Are formed, and the companion flanges 1 are connected to each other by a connecting member 9 so that they can be formed in an annular shape.

According to a second aspect of the present invention, there is provided a companion flange of the flexible pipe joint according to the first aspect, wherein the connecting member comprises a pin, and the pin is fitted into a pin hole provided in a thin portion. Thereby, the companion flanges can be connected to each other.

[0006]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a companion flange used for the flexible pipe joint of the present invention, and FIG. 2 is a perspective view of an assembled state of the companion flange. In these figures, the companion flange 1 includes a pair of arc-shaped flange pieces 2 and a connecting member 9 for connecting the flange pieces 2.
Each flange piece 2 has an arc length slightly larger than a semicircle, a thick portion 3 is provided at an intermediate portion, and thin portions 4 and 5 are provided at both ends.
The thin portions 4, 5 are formed in steps on opposite sides in the thickness direction. When the thin portions 4 and 5 of one flange piece 2 are overlapped with the thin portions 5 and 4 of the other flange piece 2 so as to coincide with each other, a companion flange 1 having a constant circumferential thickness as shown in FIG. It is formed.

An axially protruding ridge 6 is formed on the peripheral edge of one side of the thick portion 3 and the thin portion 5. The thick portions 3 and the thin portions 4 and 5 are provided with a plurality of bolt holes 7 at equal intervals, respectively, and the thin portions 4 and 5 are further provided with connecting pin holes 8. The bolt holes 7 and the pin holes 8 located in the thin portions 4 and 5 are formed such that the cores thereof coincide with each other when the thin portions 4 and 5 are overlapped.
Then, by connecting the connecting member 9 to these pin holes 8 in a state where the thin portions 4 and 5 are overlapped, the pair of flange pieces 2 are connected to each other and integrated. The pin as the connecting member 9 in this example is a cylindrical pin having a tapered distal end, and a spring pin having a slit in the axial direction of the cylindrical body. The spring pin is driven into the pin hole 8 by using a driving tool such as a hammer.

FIG. 1 shows, for reference, a mutual relationship between a flexible pipe joint 10 on which the companion flange 1 is mounted and a pipe 20 connected thereto, that is, a state before they are flange-connected. The flexible pipe joint 10 includes a pipe body 11 and
It has a flange portion 12 formed at both ends thereof, and a flange mounting portion 13 located inside the flange portion 12 in the axial direction. The pipe 20 has a flange 22 at an end of the pipe main body 21, and a plurality of bolt holes 2 at predetermined intervals in the flange 22.
3 are provided.

FIG. 3 is an axial sectional view showing a state in which the flexible pipe joint 10 is connected to the pipe 20 using the companion flange 1. The pipe body 11 of the flexible pipe joint 10 has a mountain-shaped outer periphery in the axial cross section, and is integrally formed with a reinforcing fiber 15 such as a tire cord embedded in an elastic layer 14 made of rubber or the like. Metal rings 16 and 17 are buried inside the flange 12 and the flange mounting portion 13 formed at both ends of the tube main body 11,
They are connected by a weld 18 and integrated with each other.

Next, a method for connecting the flexible pipe joint 10 to the pipe 20 as shown in FIG. 3 will be described with reference to FIG. First, the pair of flange pieces 2 are mounted on the flange mounting portion 13 of the flexible pipe joint 10. That is, each of the flange pieces 2 is pressed against the outer periphery of the flange mounting portion 13, and the thin portions 4, 5 of one flange piece 2 are overlapped with the thin portions 5, 4 of the other flange piece 2, respectively. Then, the two connecting members 9 are fitted into the respective pin holes 8. As a result, the pair of flange pieces 2 are fastened to each other to form an integrated companion flange 1, which is mounted on the flange mounting portion 13. Next, the surface of the flange 12 of the flexible pipe joint 10 to which the companion flange 1 is attached as described above is
The bolts 25 are inserted into the bolt holes 23 and 7 so that the bolt holes 23 and 7 are aligned with each other, and fastened with the nut 24. By this fastening, as shown in FIG.
0 is flanged.

[0011]

As described above, the flexible pipe joint according to the first aspect has a flexible pipe main body, flanges formed at both ends of the pipe main body, and shafts of the flanges. It has a flange mounting portion provided on the inner side in the direction and a split type companion flange which can be mounted on each flange mounting portion. Further, the split type companion flange used for the flexible pipe joint includes a pair of arc-shaped flange pieces and a connecting member for connecting the flange pieces, and the thin portions provided at both ends of each flange piece are connected to each other. By overlapping, companion flanges having a constant thickness in the circumferential direction are formed, and the formed companion flanges can be connected to each other by a connecting member. As described above, since the companion flange of the flexible pipe joint is not integrated with the pipe body, the split type companion flange is attached to the pipe body, so that it is necessary to use a complicated mold in the conventional manufacturing process. There is no need for a skilled operator because there is no problem and molding failure is less likely to occur. Therefore, the flexible pipe joint can be provided at low cost and in mass production. Furthermore, by using such a split-type companion flange, a flexible pipe joint having the above-described effects can be easily configured.

Next, the flexible pipe joint according to claim 2 is
In the above-mentioned companion flange, the connecting member comprises a pin,
The fitting flanges can be connected to each other by fitting the pins into pin holes provided in the thin portion. By using such pins and pin holes, the structure of the companion flange can be further simplified, and the assembling and integration thereof can be easily performed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a companion flange used for a flexible pipe joint of the present invention.

FIG. 2 is a perspective view of a state where the companion flanges of FIG. 1 are assembled.

FIG. 3 is an axial sectional view showing a state where a flexible pipe joint is connected to a pipe using the companion flange of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Companion flange 2 Flange piece 3 Thick part 4 Thin part 5 Thin part 6 Ridge part 7 Bolt hole 8 Pin hole 9 Connecting member 10 Flexible pipe joint 11 Pipe main body 12 Flange part 13 Flange mounting part 14 Elastic layer 15 Reinforcement Fiber 16 Metal ring 17 Metal ring 18 Welded part 20 Piping 21 Pipe main body 22 Flange 23 Bolt hole 24 Nut 25 Bolt

Claims (2)

[Claims] 1. A tube body 11 having flexibility, flanges 12 formed at both ends of the tube body 11, and the flanges 1
2. A flange mounting portion 13 provided on the inner side in the axial direction and a split-type companion flange 1 having a dividing surface in a radial direction and capable of being mounted on each of the flange mounting portions 13. Is a pair of arc-shaped flange pieces 2,
Thin portions 4, 5 provided at both ends of each flange piece 2 and a connecting member 9 for connecting the flange pieces 2 are provided, and the thin portions 4, 5 provided at both ends of each flange piece 2 overlap each other. Thereby, a companion flange 1 having a constant thickness in the circumferential direction is formed, and the companion flanges 1 are connected to each other by a connecting member 9 so that they can be formed in an annular shape. Fittings. 2. The connecting member 9 according to claim 1, wherein the connecting member 9 is formed of a pin, and the companion flanges 1 can be connected to each other by fitting the pin into a pin hole 8 provided in the thin portions 4, 5. Flexible fitting with companion flange.