Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L13/00—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints
  • F16L13/14—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
  • F16L13/141—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside
  • F16L13/142—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside with a sealing element inserted into the female part before crimping or rolling
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L37/00—Couplings of the quick-acting type
  • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
  • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
  • F16L37/091—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a ring provided with teeth or fingers

Definitions

• the invention relates to a pipe press connection consisting of a press fitting and a pipe which is then inserted and permanently connected thereto in accordance with the preamble of claim 1
• a generic pipe press connection is known from JP 55-88939. It consists of a press fitting which has at least one section which receives a sealing ring with a cross-section and a connecting section which faces the insertion side and has a first cylindrical section. On the other side of the ring bead there is a second cylindrical section Section provided that the inside diameter is smaller so that it forms a stop The transition from the annular bead to the second cylindrical section takes place via a horizontally extending jump point, which is rounded off into the two adjacent areas.
• the jump point serves as a guide for the inserted conduit
• the smooth end region of the conduit to be connected comes into contact with the stop of the second cylindrical section by means of a two or more press jaws comprising the press fitting en press tool after closing the press jaws an inseparable, tight pipe press connection is formed, the press jaws acting both on the annular bead including the then inserted sealing ring and on the first cylindrical portion of the press fitting during the pressing
• a disadvantage of this pipe press connection is that a relatively long horizontally lying gap that can be wetted by the medium to be transported is formed by the jump point between the annular bulge and the second cylindrical section. In this gap, pollutants can accumulate even when the line system is in operation, since no winding action can take place here These pollutants can attack the material from the conduit and / or press fitting. This applies in particular to industrial use, where carrier fluids interspersed with various substances are transported through the piping system
• Another type of pipe press connection is known from US Pat. No. 3,596,939.
• This consists of a press fitting with at least one section receiving a sealing ring in the form of a bead in cross-section and a adjoining first cylindrical section facing the insertion side, as well as a second cylindrical section facing away from the insertion side , both of which have the same inner diameter, as well as an inward-facing bead adjoining the annular bead, which, rounded off and forming a stop for the tube to be inserted, merges into the second cylindrical section.
• the sealing is carried out in such a way that the protruding into the interior of the press fitting Sealing is pressed together by the inserted pipe so that the sealing ring cannot be pressed away or damaged, the end face of the pipe to be inserted is mechanically processed.
• This connection is secured axially by a cyl indentation section made by means of a pressing tool
• a disadvantage of this construction is that the dimensions of the press fitting, sealing ring and inserted pipe must be coordinated within narrow limits and a conventional conduit with large tolerances cannot be used.
• the additional processing of the end face of the pipe to be inserted is disadvantageous, whereby in connection with the Stop bead a relatively long gap is formed Due to the sealing system, the transferable pressures are limited
• the object of the invention is to further develop a generic pipe press connection in such a way that, in addition to the sanitary installation, it is also suitable for line systems in the industrial sector with high internal pressures using conventional line pipes
• the sealing ring is provided with an inwardly extending sealing lip.
• This sealing lip is arranged so that it comes to rest between the end face of the inserted conduit and the stop of the second cylindrical section. This ensures that pollutants transported with the carrier liquid can no longer accumulate in this area.
• the sealing lip contour is expediently to be chosen so that the entire sealing area is washed around in such a way that no concentrations can occur.
• the pipe press connection In the sense of a design of the pipe press connection that is appropriate for the craft, it is also proposed to provide the pipe press connection with a pull-out obstacle. This is to ensure that after the insertion of the conduit and before the pressing fixes this installation situation, the conduit is not accidentally pushed back a little and a gap could form again.
• the end region of the first cylindrical section be angled and to arrange a clip element thereon to prevent the inserted conduit from being pulled out.
• This clip element is preferably designed as a resilient ring sleeve which, with the inner edge, prevents the inserted conduit from being able to be moved back without the use of force.
• the attached annular sleeves are not lost when the press fittings are transported to the installation site, they have at least one inward notch, which can snap into a corresponding recess in the end region of the second cylindrical section.
• the advantage of the proposed pipe press connection is to be seen in the fact that a gap formation in the contact area between the inserted conduit pipe and the press fitting, which can be wetted by the medium to be transported, is avoided in a simple manner, and inadvertent gap formation is reliably prevented by the arrangement of a pull-out obstacle.
• Stainless steel is preferably used for the proposed pipe press connection both for the press fitting and the conduit pipe. In terms of adequate corrosion protection, this is suitable for a wide range of liquids to be transported.
• FIG 4 like Figure 3, but with an additional pull-out obstacle
• a pipe press connection designed according to the invention is shown in a half longitudinal section, and in FIG. 2 the same pipe press connection after the pressing. It consists of a press fitting 1 with a sealing ring 2 inserted therein and a conduit 3 inserted into the press fitting 1.
• the press fitting 1 has, in a known manner, a bulge-shaped section 4 which, via a flank 5, extends into a first cylindrical section lying in the direction of insertion 6 passes.
• the direction of insertion is marked with an arrow 7.
• the more steeply falling flank 8 merges into a second cylindrical section 9 without a jump point.
• This section 9 has a smaller inner diameter 10 than the first cylindrical section 6. This forms a stop 12 for the conduit 3 to be inserted.
• the inner diameter 10 of the second cylindrical section 9 is equal to the inner diameter 13 of the inserted conduit 3.
• the gap 14 which can still be wetted by the medium (shown here in an exaggerated manner) is radial and is very much smaller than the horizontally lying gap known from the prior art.
• the inside diameter 10 of the second cylindrical section can lie in the plus tolerance, namely up to half a wall thickness 15 or in the minus tolerance up to a full wall thickness 15 of the inserted conduit 3.
• FIG. 3 shows a variant of the pipe press connection designed according to the invention, the same reference numerals being used for the same parts.
• the sealing ring 16 has a circumferential, inwardly extending sealing lip 17. This is arranged so that it comes to rest between the end face 18 of the inserted conduit 3 and the stop 12 of the second cylindrical section 9. This ensures that the pollutants contained in the flowing medium cannot be concentrated in this area.
• FIGS. Another variant with an obstacle to pulling out is shown in FIGS.
• annular sleeve 20 is clipped onto the angled end region 19 of the first cylindrical section 6.
• This sleeve 20 consists of a resilient material, for. B. spring steel, so that when inserting the conduit 3, the bottom edge 21 pushes itself away upwards. If, however, an attempt is made to move the conduit 3 back after insertion, the edge region 21 digs into the lateral surface 22 of the conduit and holds it in place.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Quick-Acting Or Multi-Walled Pipe Joints (AREA)
• Joints With Sleeves (AREA)
• Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=7832720

Family Applications (1)

Country Status (12)

Families Citing this family (6)

Family Cites Families (3)

• 1997
  • 1997-06-12 DE DE19725557A patent/DE19725557C1/de not_active Expired - Fee Related
• 1998
  • 1998-06-05 TR TR1999/02870T patent/TR199902870T2/xx unknown
  • 1998-06-05 WO PCT/DE1998/001591 patent/WO1998057086A1/de not_active Application Discontinuation
  • 1998-06-05 AU AU85305/98A patent/AU731561B2/en not_active Ceased
  • 1998-06-05 HU HU0004066A patent/HUP0004066A2/hu unknown
  • 1998-06-05 IL IL13335698A patent/IL133356A0/xx unknown
  • 1998-06-05 JP JP50132699A patent/JP2002508826A/ja active Pending
  • 1998-06-05 CA CA002293624A patent/CA2293624A1/en not_active Abandoned
  • 1998-06-05 BR BR9810516-7A patent/BR9810516A/pt active Search and Examination
  • 1998-06-05 EP EP98936138A patent/EP0988485A1/de not_active Withdrawn
  • 1998-06-05 SK SK1715-99A patent/SK171599A3/sk unknown
• 1999
  • 1999-12-10 NO NO996125A patent/NO996125L/no not_active Application Discontinuation

Non-Patent Citations (1)

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