JP6226170B2 - Ferrule gasket - Google Patents

Description

The present invention relates to a ferrule gasket.
The present invention also relates to a ferrule gasket used for a sanitary ferrule joint used in a sanitary piping system for fluid transfer in many fields such as food, beverages, pharmaceuticals, dairy farming, chemistry, and biotechnology.

  Conventionally, the ferrule gasket shown in FIGS. 4 and 5 is used for sanitary ferrule joints used in sanitary piping systems for fluid transfer in many fields such as food, beverages, pharmaceuticals, dairy farming, chemistry, and biotechnology. . (Patent Document 1)

  This type of ferrule gasket 200 has a disc-shaped main body 210 sandwiched between a pair of ferrules 100, 100 on both sides and both sides of the main body 210 so as to fit in the annular grooves 110, 110 provided on the ferrule 100, 100. It is comprised from the annular bead parts 220 and 220 provided in the surface, and it is the structure which achieves sealing between the ferrules 100 and 100 by the ferrules 100 and 100 being clamped and fixed by the clamp band 300. FIG.

However, in food-related production facilities where this type of ferrule gasket is used, liquid leakage from the sanitary ferrule fittings is likely to cause contamination of the product liquid and propagation of germs. Raised the problem of having to be discarded.
Therefore, it is necessary to replace the ferrule gasket before the end of its product life (it becomes impossible to maintain the sealing performance due to deterioration).

However, it has been difficult to determine whether or not the conventional ferrule gasket can be continuously used by checking the appearance during periodic disassembly and cleaning.
For this reason, there was a problem of wasteful replacement of a ferrule gasket that can be used sufficiently, liquid leakage, and disposal of the entire product lot.

  As described above, in the conventional ferrule gasket, it has been difficult to use the ferrule gasket as much as possible to the end of its lifetime (preserving sealing performance) and to prevent liquid leakage.

JP-A-8-121599

  The present invention has been made in view of such problems, and uses a ferrule gasket as much as possible to the end of its life (holding sealing performance), and has good sealing properties that can prevent liquid leakage. An object of the present invention is to provide a ferrule gasket.

The ferrule gasket of the present invention comprises a disc-shaped main body portion sandwiched between a pair of ferrules on both sides, and an annular bead portion provided on both side surfaces of the main body portion so as to fit in an annular groove portion provided on the ferrule. In the ferrule gasket made of rubber-like elastic material that achieves sealing between the ferrules by tightening and fixing the ferrule with a clamp band, the annular groove portion has an arc-shaped cross section, and the annular bead portion is formed on the inner side. An annular bead portion and an outer annular bead portion are formed. When the inner annular bead portion and the outer annular bead portion are in close contact with the annular groove portion, a liquid is interposed between the inner annular bead portion and the outer annular bead portion. An annular groove for accumulation is formed.

The present invention has the following effects.
According to the ferrule gasket of the first aspect of the present invention, the annular bead portion is composed of an inner annular bead portion and an outer annular bead portion, and the inner annular bead portion and the outer annular bead portion are circular in cross section. By closely contacting the groove, an annular groove for liquid accumulation is reliably formed between the inner annular bead and the outer annular bead, so that the ferrule gasket has a life limit as much as possible (maintaining sealing performance). It is possible to prevent leakage of liquid and has good sealing properties.
Furthermore, according to the ferrule gasket of the invention described in claim 2, since the inner peripheral bead is provided on both inner peripheral edges of the main body of the ferrule gasket, the life of the ferrule gasket can be further extended.

  Further, according to the ferrule gasket of the invention described in claim 3, since the disc-shaped metal reinforcing ring is integrally provided on the outer peripheral side of the main portion of the ferrule gasket, the ferrule gasket is excessively formed by the clamp band. As a result, it is possible to maintain the good sealing performance of the ferrule gasket over a long period of time.

The longitudinal cross-sectional view of the state which mounted | wore the ferrule joint with the ferrule gasket of the 1st aspect which concerns on this invention. The partial expanded longitudinal cross-sectional view of the ferrule gasket single-piece | unit shown in FIG. The figure which showed the ferrule gasket of the 2nd aspect which concerns on this invention similarly to FIG. The longitudinal cross-sectional view of the state which mounted | wore the ferrule joint with the ferrule gasket which concerns on a prior art. The partial expanded longitudinal cross-sectional view of the ferrule gasket single-piece | unit shown in FIG.

Hereinafter, modes for carrying out the present invention will be described.
As shown in FIGS. 1 and 2, the present invention is used for sanitary ferrule joints used in sanitary piping systems for fluid transfer in many fields such as food, beverages, pharmaceuticals, dairy farming, chemistry, and biotechnology. The ferrule gasket 2 made of rubber-like elastic material according to the first aspect includes a disc-shaped main body 21 sandwiched between a pair of ferrules 1 and 1 on both sides, and an annular groove portion having an arc-shaped cross section provided on the ferrules 1 and 1. 11, 11 and 11, which are composed of annular bead portions 22, 22 provided on both side surfaces 211, 211 of the main body portion 21 of the ferrule gasket 2, and the ferrules 1, 1 are fastened and fixed by the clamp band 3. The basic structure which achieves sealing between the ferrules 1 and 1 is provided.

  The annular bead portions 22, 22 are constituted by inner annular bead portions 221, 221 and outer annular bead portions 222, 222. An annular liquid pool is provided between the inner annular bead portion 221 and the outer annular bead portion 222. Grooves 223 and 223 are formed.

  As the material of the ferrule gasket 2, various rubber-like elastic bodies such as FKM, silicone rubber, EPDM, nitrile rubber, acrylic rubber, HNBR can be appropriately selected and used. From the viewpoint of heat resistance and chemical resistance, FKM is preferable.

  As described above, since the liquid retaining annular grooves 223 and 223 are formed between the inner annular bead portions 221 and 221 and the outer annular bead portions 222 and 222, when the ferrule joint is disassembled and washed, The replacement time of the ferrule gasket 2 can be determined based on whether or not the sealing object (product liquid passing through the pipe) has entered the annular grooves 223 and 223.

  That is, the main factors that cause deterioration of the annular bead portions 22 and 22 are corrosion due to the sealing object (product liquid passing through the piping) and the influence of the high temperature of the sealing object, and the inner annular bead portion 221 closer to the inside of the piping. It is considered that the outer annular bead portions 222 and 222 are deteriorated first due to the deterioration, and then the sealing object passing through the inner annular bead portion 221.

  Therefore, if the ferrule gasket 2 is replaced at the stage where the sealing object is present in the liquid pool annular grooves 223 and 223, the ferrule gasket is used as much as possible to the end of its life (sealing performance is maintained), and Liquid leakage can be prevented.

  In addition, since the annular grooves 223 and 223 for storing liquid exist, even if the ferrules 1 and 1 are fastened and fixed by the clamp band 3, there is a place for the annular beads 22 and 22 to escape, so that the ferrule gasket 2 is excessively large. Since it is not compressed, good sealing performance can be maintained.

  Further, as shown in FIG. 2, the inner peripheral bead 213, 213 is deteriorated by providing the inner peripheral bead 213, 213 on both inner peripheral peripheral portions 212, 212 of the main body 21, and the sealing object leaks. Until this is done, the time during which the inner annular bead portions 221 and 221 touch the object to be sealed can be extended, so that the seal life of the ferrule gasket 2 can be further extended.

Next, a ferrule gasket 2 made of a rubber-like elastic material according to the second embodiment of the present invention will be described with reference to FIG.
The difference from the ferrule gasket 2 made of rubber-like elastic material according to the first aspect of the present invention described above is that a disc-shaped metal reinforcing ring 23 is integrally provided on the outer peripheral side of the main body 21. It is a point.

By adopting such a configuration, it is possible to prevent the ferrule gasket 2 from being excessively tightened by the clamp band 3, so that the good sealing performance of the ferrule gasket 2 can be maintained for a long time.
As the material of the seed metal reinforcing ring 23, a SUS material is preferably used from the viewpoint of corrosion resistance.

  Moreover, the metal reinforcement ring 23 and the main-body part 21 are normally integrated in the non-bonded state. This is because the adhesive does not adversely affect the object to be sealed. For this reason, a metal reinforcing ring 23 is provided with a through hole, and the rubber-like elastic material of the main body 21 enters the through hole, thereby reinforcing the metal. It is possible to prevent the ring 23 from being detached from the main body 21.

  Further, the present invention is not limited to the best mode for carrying out the invention described above, and various other configurations can be adopted without departing from the gist of the present invention.

  It can be used for ferrule gaskets used in sanitary ferrule fittings used in sanitary piping systems for fluid transfer in many fields such as food, beverages, pharmaceuticals, dairy farming, chemistry, and biotechnology.

DESCRIPTION OF SYMBOLS 1 Ferrule 2 Ferrule gasket 3 Clamp band 11 Annular groove 21 Main body part 22 Annular bead part 23 Metal reinforcement ring 211 Side surface 212 Inner peripheral edge part 213 Inner peripheral edge bead 221 Inner annular bead part 222 Outer annular bead part 223 Annular groove for liquid accumulation

Claims (3)

The main body (21) is fitted into a disc-shaped main body (21) sandwiched between a pair of ferrules (1, 1) on both sides and an annular groove (11) provided on the ferrule (1, 1). And annular bead portions (22, 22) provided on both side surfaces (211, 211) of the ferrule (1, 1), and the ferrule (1, 1) is clamped and fixed by a clamp band (3). 1) In a rubber-like elastic ferrule gasket (2) that achieves a seal between
The annular groove (11) is a cross-sectional circular arc shape, the annular bead portion (22, 22), is more configured inner annular bead portion (221, 221) outer annular bead portion (222, 222), wherein The inner annular bead part (221, 221) and the outer annular bead part (221, 221) and the outer annular bead part (222, 222) are brought into close contact with the annular groove part (11). 222, 222) a ferrule gasket characterized in that an annular groove (223, 223) for pooling liquid is formed between them.   The ferrule gasket according to claim 1, wherein inner peripheral beads (213, 213) are provided on both inner peripheral edges (212, 212) of the main body (21).   The ferrule gasket according to claim 1 or 2, wherein a disc-shaped metal reinforcing ring (23) is integrally provided on an outer peripheral side of the main body (21).

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