JP2018179266A - Tube with flange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin tube with a flange part suitable for connection with a loose flange.SOLUTION: A tube 10 with a flange includes: a tubular tube body 20 composed of a resin material; a cylindrical part 30 composed of the same material as the tube body, and fitted to an outer periphery of the tube body, where the cylinder part has an integrated part 40 whose tip is fused with the tube body; and a flange part 50 composed of the same material as the tube body, and continuing to the tip of the integrated part, and whose diameter is enlarged in a roughly vertical direction for the tube body.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a flanged tube in which a flange portion is integrally formed at the tip of the tube, and more particularly to a flanged tube suitable for connection by a loose flange.

  In various devices such as semiconductors, electronics, medicines, biotechnology, etc. in manufacturing, cleaning, assembling, etc., tubes made of fluoroplastics are used to supply and transport fluids for raw materials, fluids for cleaning, fluids for fuel, etc. ing.

  These tubes need to be connected with each other or equipment. Therefore, in Patent Document 1, the end of the tube is flared to expand the diameter, and the joint is attached to the enlarged diameter portion. The joint is composed of a tubular joint member inserted into the inner surface of the enlarged diameter portion, the outer periphery of the tube, and a joint member and a cap nut, and the expanded diameter portion is sandwiched between the joint member and the cap nut The tube is attached to the joint by screwing.

JP 10-318475 A

  It is desirable to connect the tubes directly, without the aid of separate fittings. Therefore, the inventors conducted a flaring process on the tube tip to form a collar portion expanded in a substantially vertical direction in the axial direction, and tried to abut each other with a loose flange for fastening.

  However, when the ridge portion 91 is formed by flare processing at the tip of the tube 90, as shown in FIG. 7, the ridge portion 91 becomes thinner toward the outer periphery, and the parallelism of the front and back of the ridge portion 91 can be maintained. In addition, as a result of the thickness of the formed flange portion 91 being thin and the outer diameter of the flange portion 91 also decreasing, the strength becomes insufficient and it is difficult to connect the tubes airtightly and liquid tightly. there were. This is considered to be due to the insufficient thickness of the tube material when flared.

  An object of the present invention is to provide a resin tube having a flange portion suitable for loose flange connection.

The tube with a collar according to the present invention is
A tubular tube body made of a resin material,
A cylindrical portion made of the same material as the tube main body and fitted on the outer periphery of the tube main body, the cylindrical portion having an integrated portion whose front end is fused to the tube main body;
A collar portion which is made of the same material as the tube body, is continuous with the tip of the integrated portion, and is expanded in a substantially vertical direction with respect to the tube body;
Provide

  The flange portion may be formed by fusing the tube main body and the cylindrical portion.

  It is desirable that D1 <D3 and D2 <D3 with respect to the thickness D1 of the tube main body, the thickness D2 of the cylindrical portion, and the thickness D3 of the flange portion.

  Further, it is desirable that the integral part is expanded in an outward arc shape toward the tip end and is continuous with the collar part.

  Furthermore, as for the ridge portion, it is preferable that the parallelism of front and back is ± 0.7 mm or less on the inner peripheral side and the outer peripheral side of the ridge portion.

  The resin material is preferably a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer.

  According to the flanged tube of the present invention, the distal end of the tube body is reinforced by the cylindrical portion. Further, the collar portion can be formed to be thicker than the tube main body and the cylindrical portion by welding and integrating the tube main body and the cylindrical portion, and has high strength. Furthermore, in the case where the collar portion is formed by flare processing, the diameter of the tip of the tube main body and the cylindrical portion can be increased, so that more resin material can be provided as compared to flare processing of only the tube main body. I can improve the meat area of the department. That is, since the resin material used for the buttocks can be increased, the parallelism of the buttocks is also enhanced.

  According to the flanged tube of the present invention, by providing the flanges described above, the flanges can be butt-to-butt and airtightly and liquid-tightly connected by a loose flange.

FIG. 1 is a plan view of a barbed tube according to an embodiment of the present invention. FIG. 2 is a cross-sectional view along the axial center of the flanged tube of the present invention. 3 is a cross-sectional view taken along line III-III of FIG. FIG. 4 is a front view of the flanged tube of the present invention as viewed from the opening edge side. FIG. 5 is explanatory drawing which shows one Embodiment of the process of forming a collar part. FIG. 6 is an explanatory view showing a process of connecting the flanged tubes of the present invention with a loose flange. FIG. 7 is a plan view of the prototyped hooked tube.

  Hereinafter, the flanged tube 10 according to the embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view of a flanged tube 10 according to an embodiment of the present invention, FIG. 2 is a cross-sectional view along an axial direction, FIG. 3 is a cross-sectional view along line III-III in FIG. It is the front view seen from. As shown in the figure, the flanged tube 10 includes a tubular tube main body 20, a cylindrical portion 30 fitted on the distal end side of the tube main body 20, and an integrated portion 40 in which the tube main body 20 and the cylindrical portion 30 are integrated. The tip of the lever has a collar 50 whose diameter is expanded substantially vertically in the axial direction.

  The tube main body 20, the cylindrical portion 30, the integrated portion 40, and the collar portion 50 can be all made of the same heat-melting resin material such as a fluorine resin material. As a fluorocarbon resin material to be employed, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) is most desirable from the viewpoint of stability to a high purity chemical solution. In addition, tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride terpolymer and the like can be exemplified as the fluorocarbon resin material. The fluorine resin material is not limited to the above.

  In the flanged tube 10 of the present invention, as shown in FIG. 2, only the tip of the tube main body 20 and the cylindrical portion 30 is integrated by fusion as an integrated portion 40, but other than the integrated portion 40 As indicated by 42, the cylindrical portion 30 is in a state of being fitted and in close contact with the tube main body 20, and fusion bonding is not performed.

  The tube body 20 can have, for example, a diameter of 3 mm to 60 mm, a thickness of 0.5 mm to 5 mm, and a length of 0.05 m to 200 m. Moreover, the tube main body 20 can select various shapes, such as a straight pipe, a spiral pipe, a bending pipe, and the like.

  The tube portion 30 is fitted to the tube main body 20, thereby reinforcing the vicinity of the tip facing the loose flange 70 described later when connecting the flanged tubes 10, 10 to each other. In addition, since the tube main body 20 and the tubular portion 30 are fused and integrated in the integrated portion 40, the integrated portion 40 can be made thicker and the strength thereof is also improved. The cylindrical portion 30 may have a length of 15 mm to 50 mm, preferably 20 mm to 40 mm. More preferably, the cylindrical portion 30 has a length protruding from the loose flange 70 when connecting by the loose flange 70 shown in FIG.

  As shown in the figure, it is desirable that the integrated portion 40 has a shape in which the diameter is expanded in an outward arc shape toward the tip. By forming the integrated portion 40 not into an angular shape but into an arc shape, it is possible to prevent concentration of stress when the flanged tubes 10 are connected to each other, and to reduce the occurrence of cracks and breakage.

  Then, as shown in FIGS. 1 to 4, the integrated portion 40 is bent in a substantially vertical direction and is continuous with the collar portion 50. The flange portion 50 can be formed, for example, by fusing and integrating the tube main body 20 and the cylindrical portion 30 and by flaring. As shown in FIG. 2, when the thickness of the tube body 20 is D1, the thickness of the cylindrical portion 30 is D2, and the thickness of the ridge is D3, as shown in FIG. 2, D1 <D3 and D2 <D3. It is desirable that Thereby, the strength of the flange portion 50 can be provided, and when the flanged tubes 10 are connected to each other by the loose flange 70, the bonding strength of these can be secured, and the airtightness / liquid tightness of the connection portion can be improved. it can. Preferably, D3 is at least 1.5 times as thick as D1 or D2, and more preferably at least 1.8 times as thick.

  The flange 50 has a length of 10 mm to 50 mm, preferably 15 mm to 30 mm, and a thickness of 1.5 mm to 4 mm, preferably 2 mm to 3 mm, which are suitable for connection by the loose flange 70. The front and back surfaces of the flange portion 50 are preferably formed so that the parallelism on the inner and outer peripheral sides is ± 0.7 mm or less, more preferably ± 0.5 mm or less. Thereby, when the buttocks 50, 50 are butted, the buttocks can be in close contact with each other, and the air tightness and liquid tightness are enhanced.

  The flanged tube 10 having the above configuration can be manufactured, for example, in the manner shown in FIG.

  As shown in FIG. 5 (a), a straight tubular tube body 20 is prepared and softened by heating its tip, and the tip is shown as arrow A in FIG. 5 (a) and FIG. 5 (b). Turn over and cover the tube body 20. A portion of the cylindrical portion that covers the outer peripheral side of the tube main body 20 becomes the cylindrical portion 30. At this time, the cylindrical portion covering the tube main body 20 is not fused, and the cylindrical portion is in a state of being closely fitted to the tube main body 20.

  Subsequently, as shown by arrow B in FIG. 5 (b) and FIG. 5 (c), the tip is pushed into the heated mold 60, and diameter expansion and bending are performed by flare processing. Form For example, in the mold 60, the tube body 20 is inserted, and a convex mold 61 having an arc-shaped curved portion corresponding to the integrated portion 40 and a hole 62 into which the cylindrical portion 30 can be inserted are opened and integrated. It can be configured from an annular mold 64 having an arc-shaped curved portion corresponding to the portion 40 and an annular recess 63 corresponding to the ridge portion 50. Then, while heating the molds 61 and 64 above the softening point of the fluorocarbon resin material of the tube main body 20, the tube main body 20 and the cylindrical portion 30 are inserted by inserting the doubled tube main body 20 into the mold 60 by turning the tip upside down. As the front end of the tip is softened and fused integrally, it spreads in the recess 63 to form the collar portion 50 which is expanded substantially perpendicularly in the axial direction, and integrally which connects the collar portion 50 to the tube main body 20 and the cylindrical portion 30 The forming portion 40 is formed, and the barbed tube 10 of the present invention is manufactured.

  In FIG. 5, the tube main body 20 is turned over to form the cylindrical portion 30, but the cylindrical portion 30 having an inner diameter fitted on the outer periphery of the tube main body 20 is separately prepared, and the cylindrical portion 30 is After fitting, it may be flared. Of course, the flanged tube 10 can be manufactured by methods other than these.

  In the flange portion 50, the flared end of the doubled tube main body 20 increases the amount of the resin material entering the annular recess 63 of the mold 60 as compared with the case where only the tube main body 20 is flared. Since the thickness around the meat can be improved, the outer diameter and thickness can be secured, and the molds 61 and 64 can ensure the parallelism between the front and back surfaces.

  And although the tube main body 20 and the cylinder part 30 do not carry out fusion | melting integration (code | symbol 42), the cylinder part 30 closely_contact | adheres and encloses the outer peripheral side of the tube main body 20. As much as possible.

  The flanged tube 10 configured as described above is supplied with a raw material fluid, a cleaning fluid, a fuel fluid, etc. in an apparatus for manufacturing, cleaning, assembling, etc. in the fields of electronics such as semiconductors, semiconductors, medicines, biotechnology etc. , Can be used for transport. As the fluid passing through the inside of the flanged tube 10, a liquid or gas can be exemplified, and if necessary, powder or particles are mixed with the liquid or gas. These fluids may be either flammable or nonflammable.

  The connection between the obtained flanged tubes 10, 10 can be performed by butting the flanges 50, 50 together and fastening the loose flanges 70, 70 as shown in FIG. The loose flange 70 includes an insertion hole 71 and a plurality of bolt holes 72 for loosely fitting the cylindrical portion 30. Then, in a state where the flanges 50 and 50 are butted, the cylindrical portion 30 may be passed through the insertion hole 71, the bolt holes 72 and 72 may be aligned with each other, and the loose flanges 70 and 70 may be fastened with the bolt and nut 74 . As a result, the flanges 50, 50 are in intimate contact, and the flanged tubes 10, 10 are connected in a manner that ensures airtightness and liquid tightness. In addition, since the tube portion 30 surrounds the tube body 20, bending and bending of the tube body 20 at the tip of the flanged tube 10 can also be reduced.

  In addition, as for the loose flange 70, it is desirable to taper-process the circular arc shape according to the curved part shape of the integrated part 40 for the edge part of the penetration hole 71. As shown in FIG.

  The above description is intended to illustrate the present invention, and is not to be construed as limiting the scope of the invention as set forth in the appended claims. Further, it goes without saying that the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.

10 10 tube 20 tube body 30 cylinder 40 integrated part 50 ridge

Claims (6)

A tubular tube body made of a resin material,
A cylindrical portion made of the same material as the tube main body and fitted on the outer periphery of the tube main body, the cylindrical portion having an integrated portion whose front end is fused to the tube main body;
A collar portion which is made of the same material as the tube body, is continuous with the tip of the integrated portion, and is expanded in a substantially vertical direction with respect to the tube body;
Tubes equipped with a bowl. The flange portion is formed by fusing the tube main body and the cylindrical portion.
A barbed tube according to claim 1. The thickness D1 of the tube main body, the thickness D2 of the cylindrical portion, and the thickness D3 of the flange portion satisfy D1 <D3 and D2 <D3.
The flanged tube according to claim 1 or 2. The integrated portion is expanded in an outward arc shape toward the tip, and is continuous with the collar portion.
The flanged tube according to any one of claims 1 to 3. In the ridge portion, the parallelism of the front and back surfaces is ± 0.7 mm or less on the inner and outer circumferential sides of the ridge portion.
The flanged tube according to any one of claims 1 to 4. The resin material is a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer.
The flanged tube according to any one of claims 1 to 5.

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