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
  • F16L23/00—Flanged joints
  • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
  • F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
  • F16L23/028—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes the flanges being held against a shoulder
• • 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
  • F16L23/00—Flanged joints
  • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
  • F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
  • F16L23/028—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes the flanges being held against a shoulder
  • F16L23/0283—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes the flanges being held against a shoulder the collar being integral with the pipe
• • 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
  • F16L23/00—Flanged joints
  • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
  • F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges

Definitions

• the invention relates generally to the connection of machine piping in industrial installations, particularly in the field of the chemical, oil, mining or other industries.
• It relates more particularly to the connection of a pipeline of industrial machines of pump, valve, turbine type in a circuit in which they are intended to operate.
• connection flange can in various applications be used for the connection of a hydraulic pipe, in which a liquid circulates, or a pneumatic pipe, in which a gas flows.
• Machines of this type are conventionally provided with a body which, at their inlet and / or their outlet through which they must be connected, is provided with a pipe provided with an end cap for its connection. to the rest of the installation.
• FIG. 1 shows a first example of implementation in which the shell 1 is integral with the pipe 2 connecting the machine to form a flange with a number of axial holes, such as 3 , here eight in number, for clamping the collar 1 against a corresponding glllet, with the interposition of a seal.
• FIG. 2 Another embodiment of the flange in which the axial holes 3 are replaced by radial notches 4 for the lateral insertion of bolts.
• the material to be handled is particularly abrasive so that the body of the pump must be made of material sufficiently hard to resist abrasion. It is often, in this case, made of chrome cast iron or Ni-hard cast iron.
• Such materials are particularly hard to machine and even reach the limit of machinability, so that making hole and notches is a particularly delicate operation.
• This type of material although resistant to compression forces, is also relatively brittle, so that the flange thus produced is not able to withstand excessive clamping forces.
• the flange 5 is made in two parts 5a and 5b, generally semicircular and which are intended to be assembled, by bolting, to form a generally annular flange whose inner diameter is smaller than the outer diameter of the shell 1.
• connection flange of an industrial machine which is intended to bear on a cotlet provided on the body of the machine and to cooperate by clamping with a corresponding connection flange.
• This flange comprises an annular one-piece flange body and a split locking piece being mounted around a cylindrical portion of the body of the machine, the locking piece comprising a first face intended to bear against a range provided on the llet, and a second face constituting a stop on which bears the flange body during tightening.
• the first face is generally frustoconical so as to bear against a frustoconical bearing surface of the cup.
• the second face is flat and extends generally perpendicular to the clamping axis of the flange body on the locking piece.
• the locking piece comprises, for example, cylindrical inner and outer peripheral surfaces.
• the flange body has a radial annular shoulder by which it bears, against tightening, against the locking element.
• the flange body may, for example, have an inner peripheral surface having a first bore having a diameter less than an outer diameter of the locking member and a second bore having a larger diameter than said outer diameter of the locking member, the annular shoulder extending between the first and second bores.
• the flange body may further be drilled with a set of axial holes for its clamping, for example by means of bolts, on the corresponding flange.
• the flange body and the locking piece are each made of a single piece of steel.
• the invention also relates, according to a second aspect, to a method of connecting an industrial machine comprising a machine body provided with a connecting pipe provided with an end cap, by means of a flange such that defined above.
• This process comprises the steps of:
• FIGS 1, 2 and 3 which has already been mentioned, illustrate examples of flanges according to the state of the art
• Figure 4 is a perspective view of a connection flange according to the invention.
• Figure 5 is an exploded view of the flange of Figure 4.
• Figure 6 is a sectional view of the flange of Figures 4 and 5, in a plane extending along the general axis of a connecting pipe of the machine.
• connection flange of an industrial machine With reference to FIGS. 4 to 6, an embodiment of a connection flange of an industrial machine will be described.
• this flange is intended to ensure the connection of a machine type pump, valve, turbine, in a circuit of an industrial installation.
• the flange is thus intended to be mounted on the body of the machine, and in particular on an extension of the body forming a pipe 2, fictitiously truncated in FIGS. 4 to 6, which is provided with an end cap 1 .
• the entire machine body, including the pipe 2 is made of a hard material, type chrome cast iron, or Ni-hard cast iron.
• the flange in turn, is made in two parts, namely a flange body 6 and a locking piece 7.
• the flange body 6 has an annular shape and internally delimits a passage P allowing its insertion around the pipe.
• the smallest diameter internal dl of the flange 6 is greater than the outer diameter d2 of the cotlet 1.
• the locking piece 7 is made in the form of a split ring. It is intended to come to bear against a range 8 provided at the rear face of the collar 1. It thus constitutes a wedge against which abuts the flange body 6 to tighten.
• the locking piece 7 has an anterior face 9 facing the collar 1, of a shape complementary to that of the bearing surface 8 of the collar on which it bears.
• the front end face 9 is generally frustoconical so as to rest on a scope 8 also frustoconical. But, of course, it is not beyond the scope of the invention when the seat 8 is made in the form of an annular seat whose plane extends perpendicularly to the clamping axis or, in other words, to the general axis of the pipe 2.
• the embodiment in which the anterior face 9 of the locking piece 7 is frustoconical is advantageous insofar as, in this case, the clamping forces applied to the pipe 2 are exerted essentially in compression and can from when easily supported by the column 1.
• the latter constitutes an abutment against which the flange body 6 bears. It has a generally annular shape extending in a plane perpendicular to the axis of Tightening.
• the locking piece 7 further comprises an outer peripheral surface 11 and an inner peripheral surface 12 both cylindrical.
• the inner diameter d3 of the inner peripheral surface 12 is slightly greater than the outer diameter of the pipe 2, while remaining smaller than the outer diameter d2 of the shell 1, while the diameter d4 of the outer peripheral surface is substantially greater than the diameter d2. collar 1, and the diameter d1 of the passage P to form a stop for the flange body 6.
• the locking piece 7 is preferably made of a single annular piece of steel and is slotted, for mounting, for example by means of a grinder, so as to allow, by deformation, its mounting around the pipe 2.
• the latter comprises, internally, a first bore 13, which delimits the passage P and whose diameter d1 is greater than the internal diameter d3 and less than the external diameter d4 of the locking piece 7 while remaining greater than the diameter d2 of the collar 1, and a second bore 14, of diameter substantially greater than the external diameter d4 of the part 7.
• the two bores 13 and 14 thus delimit an annular shoulder 15 which abuts against the posterior end face 10 of the locking piece 7 (FIG. 6).
• the flange body 6 is further provided with a set of holes, such as 16, here eight in number, but which can be between four and twelve or even sixteen holes for them. large flanges, these holes 16 being intended to receive a clamping screw.
• the flange body 6 is for example made of steel, so that the drilling operation of the holes 16 is relatively easy to implement. In addition, it can easily withstand the bending forces generated by tightening. This is also the case of the locking piece 7, preferably made of steel.
• connection of an industrial machine by means of the flange which has just been described is relatively easy to implement.

Applications Claiming Priority (2)

Publications (1)

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ID=46210220

Family Applications (1)

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Citations (2)

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• 2011
  • 2011-05-30 FR FR1154695A patent/FR2976041B1/fr active Active
• 2012
  • 2012-05-29 AU AU2012264810A patent/AU2012264810A1/en not_active Abandoned
  • 2012-05-29 CA CA2833651A patent/CA2833651A1/fr not_active Abandoned
  • 2012-05-29 US US14/122,484 patent/US20140125057A1/en not_active Abandoned
  • 2012-05-29 RU RU2013158138/06A patent/RU2013158138A/ru not_active Application Discontinuation
  • 2012-05-29 WO PCT/EP2012/059982 patent/WO2012163888A2/fr active Application Filing
  • 2012-05-29 EP EP12726058.6A patent/EP2715202A2/fr not_active Withdrawn
  • 2012-05-29 CN CN201280026004.6A patent/CN103635732A/zh active Pending
• 2013
  • 2013-10-31 ZA ZA2013/08174A patent/ZA201308174B/en unknown
  • 2013-11-15 MA MA36434A patent/MA35126B1/fr unknown
  • 2013-11-29 CL CL2013003438A patent/CL2013003438A1/es unknown

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