JP2010007770A - Fluid pipeline - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid pipeline capable of easily exchanging a sealing member in maintenance while performing centering on an outer periphery of the sealing member, even when the sealing member accompanied with significant plastic deformation such as a hollow metal O-ring is used, by inserting a retaining ring holding deformation of the sealing member between the sealing member such as the hollow metal O-ring and an outer periphery of a seat housing the sealing member. <P>SOLUTION: This fluid pipeline comprises a flange tightly mounted to a body forming a flow path, in which fluid flows, by interposing the sealing member accompanied with plastic deformation for sealing into the flow path in the seat. The retaining ring is inserted between the sealing member and the outer periphery of the seat housing the sealing member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fluid pipe line, and more particularly, to a structure for sealing a fluid using a sealing member with plastic deformation, for example, a hollow metal O-ring or a hollow metal C-ring.

As shown in FIG. 4, the fluid pipe line having a structure for sealing fluid in the prior art is subjected to a large plastic deformation for sealing the flow path 11 with respect to the main body 12 forming the flow path 11 through which the fluid flows. The structure provided with the flange 15 which attaches the sealing member 13 accompanying, for example, a hollow metal O-ring etc. in the seat 14, and seal-fits is known.
In this way, the sealing member 13 is housed in the seat 14 of the main body 12 and pressed by the parts of the flange 15 to seal the fluid. At this time, in order to center the seal member 13, the gap E with the wall (outer peripheral portion 16) of the seat 14 provided on the main body 12 side needs to be reduced within an allowable range.
JP 2004-301158 A

However, in the sealing member described in the prior art, if the clearance between the sealing member 13 and the wall (outer peripheral portion 16) of the seat 14 of the main body 12 is reduced for the purpose of centering, as shown in FIG. The member 13 is deformed and comes into contact with the wall (outer peripheral portion 16) of the seat 14 of the main body 12.

When the seal member 13 is to be replaced for maintenance or the like, if the seal member 13 and the wall (outer peripheral portion 16) of the seat 14 of the main body 12 are in tight contact as shown in FIG. It becomes impossible to take out.
If you try to remove it using a tool or the like, the seating surface may be scratched, so it must be easily removable by the operator.
Accordingly, there is a problem to be solved by providing a seal structure in which a seal member with plastic deformation such as a hollow metal O-ring is centered on the outer periphery of the seat on the main body side and can be easily removed during maintenance. Have.

  In order to solve the above problems, the fluid conduit of the present invention is configured as follows.

(1) The fluid pipe is a fluid pipe provided with a flange for sealingly attaching a seal member with plastic deformation for sealing to the flow path to the main body forming the flow path through which the fluid flows. A holding ring that holds the deformation of the seal member is inserted between the seal member and the outer periphery of the seat in which the seal member is accommodated.
(2) The fluid conduit according to (1), wherein a gap is provided between the holding ring and the outer periphery of the seat.
(3) The fluid conduit according to (1), wherein the holding ring is formed of a member having higher rigidity than a seal member accompanied by plastic deformation.
(4) The fluid conduit according to (1), wherein the holding ring is formed at a height that does not interfere with the flange.

  In the present invention, a sealing member with a large plastic deformation such as a hollow metal O-ring is used by inserting a holding ring that holds the deformation of the sealing member between the sealing member and the outer periphery of the seat in which the sealing member is accommodated. Even in this case, the replacement work of the seal member at the time of maintenance can be performed very easily while performing the centering on the outer periphery of the seal member.

  Next, an embodiment of a fluid conduit according to the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected and demonstrated to the same thing as what was demonstrated by the prior art.

  As shown in FIG. 1, a fluid conduit having a structure for sealing a fluid according to the present invention is accompanied by plastic deformation for sealing the flow path 11 with respect to a main body 12 that forms the flow path 11 through which the fluid flows. A flange 15 for sealingly attaching the seal member 13 to the seat 14 is provided, and a holding ring 17 that holds the deformation of the seal member 13 between the seal member 13 and the outer peripheral portion 16 of the seat 14 in which the seal member 13 is accommodated. It is the inserted configuration.

Thus, the holding ring 17 for holding the deformation of the seal member 13 is inserted into the outside of the seal member 13 housed in the seat 14 and inside the seat 14, and the holding ring 17 and the main body A gap C is provided between the wall of the 12 seats 14 (the outer peripheral portion 16) so that the seal member 13 can be easily attached and detached.
Further, the gap D between the seal member 13 and the holding ring 17 is provided so as to allow centering.
The height of the holding ring 17 needs to be set to a height that does not interfere with the flange 15 when the seal member 13 is crushed by plastic deformation in consideration of plastic deformation that occurs when the seal member 13 tightens the flange 15. is there. In other words, it is necessary that the height of the seat 14 is limited to the height at which the seal member 13 is accommodated and does not interfere with the flange 15.
Further, the holding ring 17 is formed of a member having higher rigidity than the seal member 13 accompanied by plastic deformation, so that the holding ring 17 is held even when the seal member 13 is plastically deformed and acts to spread the holding ring 17 outward. The ring 17 does not adhere to the wall (outer peripheral part) 16.

  As shown in FIG. 2, when the flange 15 is pressed against the seal member 13 with a bolt or the like, the seal member 13 is deformed and contacts the inside of the holding ring 17. The holding ring 17 has a rigidity that can withstand the force that is pushed outward by the deformation of the seal member 13, that is, a rigidity that does not tightly adhere to the holding ring 17 when pressed against the wall (outer peripheral part 16). The gap C between the ring 17 and the seat wall (outer peripheral part 16) of the main body 12 is maintained.

  As shown in FIG. 3, since the clearance C between the retaining ring 17 and the wall (outer peripheral part 16) of the seat of the main body 12 is maintained, the sealing member 13 and the retaining ring 17 can be removed together at the time of maintenance. Removal of 13 becomes extremely easy.

By inserting a holding ring for holding the deformation of the sealing member between the sealing member such as a hollow metal O-ring and the outer periphery of the seat in which the sealing member is accommodated, a sealing member with a large plastic deformation such as a hollow metal O-ring is provided. Provided is a fluid conduit that can easily perform a replacement operation of a seal member during maintenance while performing centering on the outer periphery of the seal member even when used.

It is explanatory drawing which showed schematically the relationship between the sealing member accommodated in the seat with which the fluid pipe line of this invention was equipped, and a holding ring. It is explanatory drawing which showed a mode that it fastened with the flange same as the above. It is explanatory drawing which showed a mode that the sealing member and the holding ring were removed in the same state. It is explanatory drawing which showed schematically the relationship between the sealing member accommodated in the seat with which the fluid pipe line in the prior art was equipped, and a holding ring. It is explanatory drawing which showed a mode that it fastened with the flange same as the above. It is explanatory drawing which showed a mode that a sealing member contacted the wall of the seat of a main body, and could not be removed easily.

Explanation of symbols

11 Channel 12 Body 13 Seal Member 14 Seat 15 Flange 16 Outer Periphery 17 Holding Ring

Claims (4)

A fluid conduit having a flange for sealingly attaching a seal member with plastic deformation for sealing to the flow path to a main body forming a flow path through which fluid flows,
A fluid conduit, wherein a holding ring for holding deformation of the seal member is inserted between the seal member and an outer periphery of the seat in which the seal member is accommodated.   The fluid conduit according to claim 1, wherein a gap is provided between the holding ring and the outer periphery of the seat.   The fluid conduit according to claim 1, wherein the holding ring is formed of a member having higher rigidity than a seal member accompanied by the plastic deformation.   The fluid conduit according to claim 1, wherein the holding ring is formed at a height that does not interfere with the flange.

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