JPH09257131A - O-ring device for pipe connection - Google Patents

Abstract

(57) [Summary] (Correction) [PROBLEMS] In an O-ring device for connecting pipes, it is possible to improve work efficiency such as replacement, cleaning, and inspection of O-rings and pipes. SOLUTION: An O-ring 1 composed of a sealing ring having a circular cross-section, and a metal made to have a width smaller than the cross-sectional diameter of the O-ring 1 and fitted into the inner peripheral side of the O-ring to prevent the displacement thereof. Inner ring 2 and O ring 1
The outer ring 9 is made of metal and has a width smaller than the cross-sectional diameter of the O-ring and is fitted on the outer peripheral side of the O-ring to prevent the displacement thereof. The metal holding ring 10 having an inner diameter slightly larger than the outer diameter of the flange of the pipe to be fitted and further fitted on the outer peripheral side of the outer ring 9 so as to prevent the central axis of the O ring from being displaced from the pipe is combined. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an O-ring device for connecting pipes, which is used for sealing vacuum pipes at their flanges so as to prevent air from leaking when they are connected by clamp joints. The present invention relates to an O-ring device for connecting pipes, which can improve work efficiency such as replacement, cleaning, and inspection of O-rings and pipes.

[0002]

2. Description of the Related Art As shown in FIGS. 4 (a) and 4 (b), a conventional O-ring device for connecting a pipe of this type includes an O-ring 1 composed of a sealing ring having a circular cross section, and an O-ring 1 for the O-ring 1. A metal inner ring 2 formed to have a width smaller than the cross-sectional diameter and fitted on the inner peripheral side of the O-ring 1 to prevent displacement thereof, and a width smaller than the cross-sectional diameter of the O-ring 1. At the same time, it is combined with a metal outer ring 3 which has a wide circumferential pressing member 4 integrally formed on the outer peripheral end face and is fitted on the outer peripheral side of the O-ring 1 to prevent its displacement. Was becoming.

To connect, for example, a vacuum pipe at its flange portion with a clamp joint using such an O-ring device for pipe connection, the connection is made according to the procedure shown in FIGS. 5 (a) to 5 (c). Was there. First, as shown in FIG. 5A, the vacuum pipes 5a and 5b to be connected are opposed to each other with an appropriate distance d between the flanges 6a and 6b. Next, this opposed flange 6
As shown in FIG. 5 (b), the O-ring device 7 for pipe connection combined as shown in FIG. 4 is inserted between a and 6b. Then, in this state, the vacuum pipes 5a located on both sides,
5b are brought close to each other, and the O-ring 1 of the O-ring device 7 for pipe connection is sandwiched by the inner end surfaces of the flanges 6a, 6b. At this time, the flanges 6a and 6b are
The leading end portion of the above enters into the inside of the pressing member 4 of the outer ring 3.

Next, as shown in FIG. 5 (c), for example, the clamp ring 8 of the upper and lower clamp joints is divided into two.
The portion of the pipe connecting O-ring device 7 sandwiched by the flanges 6a and 6b is clamped by a and 8b from the entire circumference in the circumferential direction. At this time, since the outer end surfaces of the flanges 6a and 6b are formed in a tapered shape, and the inner pressing surfaces of the clamp rings 8a and 8b are formed in a tapered concave shape, tightening not shown is shown. By tightening the bolts, the O-ring 1 and the inner end surfaces of the flanges 6a and 6b are brought into close contact with each other and sealed.
Then, in order to remove the pipe connecting O-ring device 7 from the vacuum pipes 5a and 5b connected in this way, it is sufficient to operate in the reverse order of the above procedure.

[0005]

However, in such a conventional O-ring device 7 for pipe connection, as shown in FIG. 4, the outer peripheral end surface of the outer ring 3 is provided with a wide pressing member 4 in the circumferential direction. Since it was integrally provided, first, in order to remove the O-ring device 7 for pipe connection, first, as shown in FIG.
Loosen the tightening bolts at the clamp rings 8a, 8
5b is opened to release the tightening, and then the vacuum pipes 5a and 5b located on both sides in FIG. 5B are separated from each other so that the distance d between the respective flanges 6a and 6b is larger than the width of the pressing member 4. In this state, the pipe connecting O-ring device 7 was removed from between the flanges 6a and 6b as shown in FIG. 5 (a). In this case, in order to separate the vacuum pipes 5a and 5b located on both sides from each other, the clamp rings 8a and 8b and the O-ring device 7 for pipe connection at other positions in the pipe system had to be removed. Therefore, the work for removing the O-ring device 7 for pipe connection from the vacuum pipes 5a, 5b is a large-scale operation and takes time. As a result, the work efficiency of replacement, cleaning, inspection, etc. of the O-rings and pipes is reduced.

[0006] Therefore, the present invention is to provide an O-ring device for pipe connection, which can cope with such problems and improve the work efficiency such as replacement, cleaning and inspection of O-rings and pipes. To aim.

[0007]

In order to achieve the above object, an O-ring device for pipe connection according to the present invention comprises an O-ring composed of a sealing ring having a circular cross section and a width smaller than the cross-sectional diameter of the O-ring. A metal inner ring that is formed on the inner circumference side of the O-ring to prevent its displacement, and a metal inner ring that is formed with a width smaller than the cross-sectional diameter of the O-ring and is fitted on the outer circumference side of the O-ring. The outer ring made of metal for preventing the displacement and the inner ring formed to have a width larger than the cross-sectional diameter of the O-ring and having an inner diameter slightly larger than the outer diameter of the flange of the pipe to be connected are further provided. This is a combination of the O-ring fitted on the outer peripheral side and a metal holding ring for preventing the center axis of the pipe from being displaced.

[0008]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing an embodiment of an O-ring device for pipe connection according to the present invention, and FIG. 2 is an overall view of a combination thereof. This O-ring device for connecting pipes is for sealing, for example, air when the vacuum pipes are connected by clamp joints at their flanges so that air does not leak at the connection, and as shown in FIGS. 1 and 2. , O-ring 1, inner ring 2,
The outer ring 9 and the pressing ring 10 are combined.

The O-ring 1 is composed of a sealing ring having a circular cross section, which is made of nitrile rubber or other material suitable for the intended use. The inner ring 2 is fitted on the inner peripheral side of the O-ring 1 to prevent the displacement of the O-ring 1.
The ring 1 is formed to have a width smaller than the sectional diameter of the ring 1, and an arcuate groove is formed on the outer peripheral surface 11 along the circular cross section of the O-ring 1, and is made of a metal such as stainless steel or aluminum. The outer ring 9 is fitted on the outer peripheral side of the O-ring 1 to prevent its position displacement. The outer ring 9 is formed to have a width smaller than the cross-sectional diameter of the O-ring 1 and the inner peripheral surface 12 thereof. An arcuate groove is formed along the circular cross section of the O-ring 1, and is made of a metal such as stainless steel or aluminum. Further, the pressing ring 10 is fitted on the outer peripheral side of the outer ring 9 so as to prevent the central axes of the O-ring 1 and the pipe from shifting, and has a width larger than the cross-sectional diameter of the O-ring 1. It is formed into a band-shaped ring having an inner diameter slightly larger than the outer diameter of the flange of the pipe to be formed and connected, and is made of a metal such as stainless steel or aluminum.

The inner ring 2 is fitted on the inner peripheral side of the O-ring 1 constructed as described above, the outer ring 9 is fitted on the outer peripheral side of the O-ring 1, and the outer ring 9 is pressed on the outer peripheral side. By fitting the ring 10 into the pipe connecting O of the present invention as shown in FIG.
The ring device 13 is configured.

Next, the pipe connecting O constructed as described above
To connect, for example, a vacuum pipe at its flange portion with a clamp joint using the ring device 13, as shown in FIG.
Connection is made by the procedure as shown in (d). First, FIG.
As shown in (a), the vacuum pipes 5a and 5b to be connected are opposed to each other with an appropriate distance between the flanges 6a and 6b. Next, the holding ring 10 shown in FIG. 1 is placed and positioned on the outer peripheral side of one of the opposed vacuum pipes 5a and 5b. Here, the inner ring 2 is provided on the inner peripheral side of the O-ring 1 shown in FIG.
Is fitted and the outer ring 9 is fitted on the outer peripheral side of the O-ring 1 to be assembled.

Next, an assembly of the O-ring 1, the inner ring 2 and the outer ring 9 combined as described above is shown in FIG.
As shown in (b), the vacuum pipes 5a and 5b facing each other are provided.
It is inserted in the space d between the flanges 6a and 6b. In this state, the holding ring 10 which has already been located on the outer peripheral side of the one vacuum pipe 5a is moved in the direction of arrow B, and
As shown in (c), the outer ring 9 is positioned on the outer peripheral side. At this time, the pressing ring 10 is fitted on the outer peripheral side of the outer ring 9 and each flange 6a,
The tip portion of 6b comes to be enclosed inside.

Thereafter, as shown in FIG. 3 (d), for example, the portion of the O-ring device 13 for pipe connection which is sandwiched by the respective flanges 6a and 6b by the clamp rings 8a and 8b of the clamp joint which is divided into upper and lower parts. Tighten from the entire circumference in the circumferential direction. At this time, the flanges 6a and 6b are
The outer end surfaces of the clamp rings 8a, 8b are formed in a tapered shape, and the inner pressing surfaces of the clamp rings 8a, 8b are formed in a concave shape with a taper. 1 and the inner end surfaces of the flanges 6a and 6b are in close contact with each other and sealed. This completes the work of connecting the vacuum pipes 5a and 5b.

The vacuum pipe 5 connected in this way
To remove the O-ring device 13 for pipe connection from a and 5b, it is sufficient to operate in the reverse order of the above procedure. That is, first, in FIG. 3D, the tightening bolt is loosened to open the clamp rings 8a and 8b to release the tightening. Next, FIG.
In (c), the holding ring 10 located on the outer peripheral side of the outer ring 9 is moved in the direction of arrow C, and the holding ring 10 is located on the outer peripheral side of one vacuum pipe 5a as shown in FIG. 3 (b). . As a result, the outer ring 9
There is no member that closes the outer peripheral side of. Next, in that state, the assembly of the O-ring 1, the inner ring 2 and the outer ring 9 shown in FIG. 3B is assembled into the flanges 6a and 6b.
Remove from between. Thereby, the pipe connection O-ring device 13 can be removed from the connection portion of the vacuum pipes 5a and 5b. At this time, as shown in FIG. 3A, the distance d between the flanges 6a and 6b of the vacuum pipes 5a and 5b may be left unchanged without being widened. Therefore, it is not necessary to remove the clamp rings 8a, 8b and the O-ring device 7 for pipe connection at other positions in the pipe system unlike the conventional case.

[0015]

Since the present invention is constructed as described above,
An O-ring consisting of a sealing ring with a circular cross section and this O-ring
A metal inner ring formed to have a width smaller than the cross-sectional diameter of the ring and fitted on the inner peripheral side of the O-ring to prevent the displacement thereof, and a metal inner ring formed to have a width smaller than the cross-sectional diameter of the O-ring. An outer ring made of metal that is fitted on the outer peripheral side of the ring to prevent its displacement, and an inner diameter that is formed with a width larger than the cross-sectional diameter of the O-ring and that is slightly larger than the outer diameter of the flange of the pipe to be connected. Since the O-ring is fitted on the outer peripheral side of the outer ring and is fitted with a metal holding ring that prevents the center axis of the pipe from being displaced, the piping system is different from the conventional one. Without removing the clamp ring and O-ring device for pipe connection at other positions in the
The O-ring device for pipe connection can be easily attached and detached. Therefore, it is possible to improve work efficiency such as replacement, cleaning, and inspection of the O-ring and the pipe.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of an O-ring device for pipe connection according to the present invention.

FIG. 2 is an overall view of a combination of the above O-ring devices for pipe connection.

FIG. 3 is an explanatory diagram showing a procedure of connecting, for example, a vacuum pipe at a flange portion thereof with a clamp joint by using the pipe connecting O-ring device.

FIG. 4 is an explanatory view showing a conventional O-ring device for pipe connection, (a) is a perspective view of the whole combination, (b).
Is a sectional view taken along line AA.

FIG. 5 is an explanatory view showing a procedure of connecting, for example, a vacuum pipe at a flange portion thereof with a clamp joint using a conventional O-ring device for pipe connection.

[Explanation of symbols]

 1 ... O-ring 2 ... Inner ring 5a, 5b ... Vacuum piping 6a, 6b ... Flange 8a, 8b ... Clamp ring 9 ... Outer ring 10 ... Pressing ring 13 ... O-ring device for pipe connection

Claims (1)

[Claims] 1. An O-ring composed of a sealing ring having a circular cross section, and a metal made of a ring having a width smaller than the cross-sectional diameter of the O-ring and fitted into the inner peripheral side of the O-ring to prevent displacement thereof. An inner ring, a metal outer ring formed to have a width smaller than the cross-sectional diameter of the O-ring and fitted on the outer peripheral side of the O-ring to prevent displacement thereof, and a width larger than the cross-sectional diameter of the O-ring. Made of a metal having an inner diameter slightly larger than the outer diameter of the flange of the pipe to be connected and fitted to the outer peripheral side of the outer ring so that the central axes of the O-ring and the pipe are not displaced. An O-ring device for pipe connection, characterized in that it is combined with the presser ring.