JP2020020377A - Sanitary pipeline - Google Patents

Abstract

To provide a sanitary pipeline which achieves excellent compatibility with an existing pipeline while keeping strength.SOLUTION: A sanitary pipeline 10 has a transparent resin pipe 12 and a ferrule joint part 14. The transparent resin pipe 12 includes a body part 126, a small diameter pipe part 122, and a pipe side flange part 124. The small diameter pipe part 122 extends from at least one end part of the body part 126. The ferrule joint part 14 includes a joint side body part 146 and a joint side flange part 144. The joint side flange part 144 is configured to contact with the pipe side flange part 124 in a state where the small diameter pipe part 122 is inserted into the joint side body part 146. The sanitary pipeline 10 is formed by bonding at least the pipe side flange part 124 and the joint side flange part 144 to each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sanitary pipe having a transparent resin pipe and a ferrule joint that can be bonded to an end of the transparent resin pipe.

  Sanitary tubing is used for fluid transfer in many fields, including food, beverages, pharmaceuticals, and the like. In such sanitary piping, a ferrule joint is often used. The reason is that the ferrule joint can be assembled and disassembled without a tool, so that the ferrule joint can be easily used for a portion that is frequently removed for cleaning or the like. In addition, since the inside of the ferrule joint portion has no irregularities and is excellent in cleaning properties, and it is difficult for liquid to pool, the risk of contamination with foreign substances and the risk of bacteria generation can be suppressed.

  A general sanitary pipe often includes a ring-shaped ferrule gasket, a pair of ferrule joints sandwiching the ferrule gasket, and a clamp for tightening the opposing ferrule joints in a direction approaching each other. So far, stainless steel materials have been widely used as sanitary piping materials.

  However, since the sanitary pipe made of stainless steel is not transparent, it has been often pointed out that it is difficult to grasp the condition inside the pipe.

  Therefore, some prior arts employ sanitary piping using a transparent resin material (for example, see Patent Documents 1 and 2). It has been described that the use of such a sanitary pipe makes it possible to detect a more sanitary and unsanitary situation at an early stage.

JP 2000-213682 A Japanese Utility Model Registration No. 3052672

  However, the piping according to the above-described conventional technology has no particular problem when newly constructing a sanitary piping system, but is considered to be difficult to apply to an existing sanitary piping system. The reason for this is that, since a configuration is employed in which the ferrule joint is fitted to the outer periphery of the ordinary resin pipe, the flange portion of the ferrule joint tends to be larger than the existing one.

  When the sizes of the flange portions of the ferrule joint portions are different, it is difficult to clamp the opposing ferrule joint portions with a clamp, and there is a risk that fluid leaks from the clamp position. On the other hand, when the shape of only the flange portion of the ferrule joint is to be adjusted, there is a risk that the strength of the ferrule joint is insufficient.

  An object of the present invention is to provide a sanitary pipe excellent in compatibility with existing pipes while maintaining strength.

  A sanitary pipe according to the present invention includes a transparent resin pipe and a ferrule joint that can be bonded to an end of the transparent resin pipe. The transparent resin pipe includes a main body, a small-diameter pipe, and a pipe-side flange. The small diameter pipe extends from at least one end of the main body. The small diameter tube portion is configured to have an outer diameter smaller than the outer diameter of the main body portion. As a result, a step is formed at the boundary between the main body and the small diameter pipe. And the pipe side flange-shaped part is provided in the small diameter pipe part.

  The ferrule joint has a joint-side main body and a joint-side flange. The joint-side main body is configured to be insertable such that the small-diameter pipe fits therein. The joint-side flange is configured to come into contact with the pipe-side flange while the small-diameter pipe is inserted into the joint-side main body.

  The sanitary pipe is configured by bonding at least the pipe-side flange and the joint-side flange.

  In this configuration, since the ferrule joint is configured to fit into the small-diameter pipe, the thickness of the ferrule joint and the size and shape of the flange can be made the same as existing standard products. In addition, since the pipe-side flange portion and the joint-side flange portion are bonded and fixed in the small-diameter tube portion, the strength can be maintained as a whole even if the small-diameter tube portion becomes thin.

  In the above-described sanitary pipe, the pipe-side flange and the joint-side flange are in contact with each other, and further include a fixing ring member having a groove configured to fit tightly into these flanges. It is preferable that the pipe-side flange portion and the joint-side flange portion are fixed by the fixing ring member.

  By employing such a configuration, the strength of the small-diameter tube portion is further increased. Specifically, if the outer shape is reduced while the inner wall is flush, the wall thickness is reduced. However, by fixing the fixing ring member to the small-diameter tube portion, the small-diameter tube portion is less likely to break. Further, the transparent resin pipe is harder to come off from the ferrule joint portion by the fixing ring member, and the sealing performance is further improved.

  In the above-described sanitary piping, the transparent resin pipe is made of polymethylpentene resin, the ferrule joint is made of stainless steel, and the transparent resin pipe and the ferrule joint are adhered by an acrylic adhesive. Is preferred.

  In this configuration, by using a material having excellent releasability and water repellency, foreign substances are less likely to adhere to the inner wall of the sanitary pipe. In addition, polymethylpentene resin is also excellent in transparency, making it easy to grasp the behavior of the fluid inside the sanitary pipe, and to enable early detection of unsanitary conditions such as sediment generation and microbial propagation. Become. Furthermore, since polymethylpentene resin is also excellent in heat resistance, transfer of a high-temperature fluid becomes easy.

  In addition, as the acrylic adhesive, Scotch Weld DP-8005, DP-8010 (two-component mixed acrylic adhesive manufactured by Sumitomo 3M Limited) and the like can be mentioned. An adhesive is applied to the transparent resin pipe and the ferrule joint portion using an application device such as a manual dispensing gun, in principle, over the entire contact area. Usually, after bonding and bonding, by maintaining the bonding state in an environment of 40 ° C. for 15 minutes, an adhesive force withstanding a stress of 4 MPa or more can be obtained.

  By using DP-8010 Clear (manufactured by Sumitomo 3M Limited) or its equivalent, which is a two-part room temperature curing type that can bond a polyolefin material, the ferrule joint is made of metal and the transparent resin pipe is made of polyolefin. Even in the case of a material, it was possible to suitably bond.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to implement | achieve the sanitary piping excellent in compatibility with existing piping, maintaining strength.

It is a figure showing the outline of the sanitary piping concerning one embodiment of the present invention. It is a figure which shows an example of a schematic structure of a fixing ring member. It is a figure showing the example of connection of the sanitary piping concerning one embodiment of the present invention.

  FIGS. 1A and 1B schematically show a sanitary pipe 10 according to an embodiment of the present invention. The sanitary pipe 10 includes a transparent resin pipe 12 and a ferrule joint 14 that can be adhered to the transparent resin pipe 12. Examples of the material of the transparent resin pipe 12 include transparent polyvinyl chloride and polyolefin-based resin, and here, polymethylpentene is employed. Examples of the material of the ferrule joint portion 14 include metals having excellent corrosion resistance, such as stainless steel.

  The transparent resin pipe 12 includes a main body 126, a small-diameter pipe 122, and a pipe-side flange 124. The small-diameter tube portion 122 extends from at least one end of the main body 126 and has an outer diameter smaller than the outer diameter of the main body 126. Since there is a difference between the outer diameters of the main body portion 126 and the small-diameter tube portion 122, a step portion 125 is formed at the boundary therebetween.

  In this embodiment, a configuration is shown in which the small-diameter tube portions 126 extend at both ends of the main body portion 126, but the small-diameter tube portion 126 may extend only at one end of the main body portion 126. The pipe-side flange 124 is provided on the small-diameter pipe 122.

  On the other hand, the ferrule joint 14 includes a flange 142, a joint-side main body 146, and a joint-side flange 144. The flange portion 142 has a groove in which a gasket described later is mounted. The joint-side main body 146 is configured to be insertable such that the small-diameter pipe 122 is fitted into the inside thereof when connected to the transparent resin pipe 12.

  The joint-side flange 144 is configured to abut the pipe-side flange 124 with the small-diameter tube 122 inserted into the joint-side main body 146. The joint-side flange 144 abuts on the pipe-side flange 124 to position the small-diameter tube 122 into the joint-side main body 146.

  When the rule joint portion 14 is connected to the transparent resin pipe 12, at least the pipe-side flange portion 124 and the joint-side flange portion 144 are bonded by an adhesive. Here, an acrylic adhesive (Scotch Weld DP-8010 manufactured by Sumitomo 3M Limited) is used. In this embodiment, after the pipe-side flange portion 124 and the joint-side flange portion 144 are bonded, the fixing ring member 16 is further applied to the bonded portion.

  As shown in FIGS. 2A to 2C, the fixing ring member 16 includes two ring pieces 162 having the same structure. The ring piece 162 includes a main body 168 having a groove configured to fit snugly into the flange formed by the pipe-side flange 124 and the joint-side flange 144 bonded to each other. A first engaging portion 164 and a second engaging portion 166 are provided at both ends of the main body 168.

  When the ring pieces 162 are joined, the first engagement portion 164 of one ring piece 162 and the second engagement portion 166 of the other ring piece 162 engage, and the second And the first engaging portion 164 of the other ring piece 162 are engaged.

  By fitting the two ring pieces 162 while fitting the pipe-side flange portion 124 and the joint-side flange portion 144 into the groove of the main body 168, the pipe-side flange portion 124 and the joint-side flange by the fixing ring member 16 are bonded. The fixing with the shape part 144 is performed.

  Since the fixing of the pipe-side flange portion 124 and the joint-side flange portion 144 is performed in the small-diameter tube portion 122, the strength of the small-diameter tube portion 122 is increased. Further, since the fixing ring member 16 is bonded to the outer peripheral portion of the small-diameter tube portion 122, the strength of the small-diameter tube portion 122 is further increased. For this reason, even when the thickness of the small-diameter tube portion 122 is reduced to make the inner wall of the sanitary pipe 10 flush, the small-diameter tube portion 122 maintains sufficient strength, and thus is less likely to break or bend. Since the fixing ring member 16 is disposed at a position where it does not easily interfere with other piping members, the presence of the fixing ring member 16 does not hinder the piping work of the sanitary pipe 10.

  When assembling the above-described sanitary pipe 10, as shown in FIG. 1 (A), the small-diameter pipe section of the transparent resin pipe 12 is applied in a state where an adhesive is applied to a fitting portion of the small-diameter pipe section 122 and the ferrule joint section 14. The ferrule joint portion 14 is fitted into the 122. At this time, the ferrule joint portion 14 is positioned by the pipe-side flange portion 124 and the joint-side flange portion 144 being in contact with each other.

  Then, as shown in FIG. 1B, the fixing ring member 16 is bonded to the pipe-side flange portion 124 and the joint-side flange portion 144 via an adhesive. The bonded state of the transparent resin pipe 12 and the ferrule joint portion 14 is maintained for at least 15 minutes after the bonding. At this time, the bonding strength is increased by placing in a high temperature environment of 40 ° C. or higher.

  Through the above process, the sanitary pipe 10 as shown in FIG. 3A is assembled. As shown in FIG. 3B, the sanitary pipe 10 can be connected to the same type of sanitary pipe 10 by tightening the gasket 30 with the clamp 20 while sandwiching the same.

  Further, as shown in FIG. 3C, the sanitary pipe 10 can be connected to the existing sanitary pipe 100 smoothly. The reason is that the provision of the small-diameter tube portion 122 increases the degree of freedom of the shape of the ferrule joint portion 14 (particularly, the portion of the flange portion 142). This is because the shape and size can be easily made to be compatible with the existing sanitary piping 100.

  According to the above-described sanitary pipe 10, it is possible to ensure the hermeticity of the pipe when transferring a fluid whose entry of foreign matter is strictly controlled. Further, even if the fluid to be transferred has a high temperature of 80 ° C. or higher, it can be smoothly transferred. Further, it is possible to easily perform disassembly and assembly when cleaning the sanitary pipe 10. In addition, since it has excellent compatibility with existing sanitary piping, there is an advantage that it can be easily introduced into existing equipment.

  The description of the above embodiment is illustrative in all aspects and should not be construed as limiting. The scope of the present invention is defined by the terms of the claims, rather than the embodiments described above. Further, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the claims.

Reference Signs List 10-sanitary pipe 12-transparent resin pipe 14-ferrule joint 16-fixing ring member 20-clamp 30-gasket 122-small diameter pipe part 124-flange part 126-body part 144-flange part

Claims (3)

A sanitary pipe having a transparent resin pipe and a ferrule joint that can be bonded to an end of the transparent resin pipe,
The transparent resin pipe,
The main body,
A small-diameter tube portion extending from at least one end of the main body portion and having an outer diameter smaller than the outer diameter of the main body portion,
While having a pipe-side flange-shaped portion provided in the small-diameter pipe portion,
The ferrule joint is
A joint-side main body configured to be insertable so that the small-diameter pipe fits into the inside,
A joint-side flange configured to be in contact with the pipe-side flange in a state where the small-diameter tube is inserted into the joint-side main body;
A sanitary pipe characterized in that at least the pipe-side flange and the joint-side flange are bonded to each other. In a state where the pipe-side flange-shaped portion and the joint-side flange-shaped portion are in contact with each other, a fixing ring member having a groove configured to fit tightly with these flange-shaped portions is further provided.
The sanitary pipe according to claim 1, wherein the pipe-side flange portion and the joint-side flange portion are fixed by the fixing ring member. The transparent resin pipe is made of polymethylpentene resin,
The ferrule joint is made of stainless steel,
The sanitary pipe according to claim 1, wherein the transparent resin pipe is bonded to the ferrule joint or an acrylic adhesive.

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