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-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
  • F16L13/14—Non-disconnectible 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-disconnectible 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
• • 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-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
  • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
  • F16L13/146—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by an axially moveable sleeve
• • 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
  • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
  • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
  • F16L19/025—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges
  • F16L19/028—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall
  • F16L19/0286—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall and being formed as a flange
• • 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
  • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
  • F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
  • F16L19/10—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered
• • 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
  • F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
  • F16L25/02—Electrically insulating joints or couplings
  • F16L25/03—Electrically insulating joints or couplings in non-disconnectable pipe joints

Definitions

• the invention relates to a device for connecting fluid circulation tubes and a method for producing such a device.
• the invention applies more particularly to gas circulation tubes or liquids embedded in an aircraft.
• the invention applies to nitrogen systems of aircraft fuel tanks subjected to a nominal pressure of 15 bars.
• the pipes of these circuits pass through the fuel tank and must have the necessary resistance to chemicals, especially kerosene.
• the invention is also applicable to coolant circuits operating at pressures of about 15 bar.
• the invention can also be applied to oxygen circuits as well as hydraulic circuits of pressurized liquid for flight control or landing gear controls subjected to pressures of the order of 350 bars.
• the circulation of fluids, especially when they are liquids, in metal pipes, can generate the formation of electrical charges.
• Tubing connections are known which prevent the accumulation of electric charges resulting from the circulation of the fluids, while ensuring a secure circulation of these fluids through two tubes whose respective ends are coaxially held opposite one another .
• connection is a dielectric connection which is described with reference to Figure 1 showing a schematic sectional view of this connection.
• the end 2 of a first tube 3 and the end 4 of a second tube 5 are held stationary relative to each other. More specifically, these two ends 2 and 4 are coaxially arranged facing one another so that the fluids flowing along the arrow 6 pass through the connector 1 securely.
• This connection 1 comprises a nonmetallic hydraulic hose 7 which provides the connection between the first 3 and second 5 tubes.
• This metal hydraulic pipe 7 is fitted on the respective ends 2,4 of these two tubes 3,5 which each comprise a metal plug 8 extending axially along and at a distance from this tube 3.5 towards its end. 2.4, and having hooks 10 which firmly hold the hydraulic hose 7 between the metal jacks 8 and the end 2.4 of each of these first 3 and second 5 tube.
• the metal hydraulic pipe 7 is made of several non-metallic layers not shown in this figure and which include a layer for controlling the electrical resistance of the dielectric connector 1, for example a carbon layer.
• the dielectric connector also comprises a casing 9 which completely covers the metal hydraulic pipe 7 and partially the two tubes 3.5 which it connects.
• the present invention provides a tube connecting device for connecting the opposite ends of the tubes connected by a first connection, for example the dielectric connection described above, to a pipe of a fluid circuit.
• the device for connecting fluid circulation tubes of the invention comprises a first connector ensuring the connection of a first and a second tube, in which first connection the respective ends of the first and second tubes are arranged. coaxially facing each other.
• This device is essentially characterized in that at least one of the opposite ends of the first and second tubes is capable of being secured to a second connection which is intended to connect the first or second tube to a pipe of a circuit of fluids, which second connection comprises at least a portion which is formed in one piece with the opposite end of the tube in question, so that this part of the second connection forms opposite end of the tube in question.
• the tube connecting device of the invention may also include the following optional features considered in isolation or in any possible technical combination:
• the second connection comprises at least one crimping zone which gives it the ability to be fixed by a crimping operation at the end of the pipe of a fluid circuit.
• the second connection is a sleeve forming the opposite end of the tube and having at least one crimping zone ensuring the crimping of the pipe by applying a radial compression force at this crimping zone.
• the sleeve comprises a ring forming crimping means by axial displacement along said sleeve during the crimping operation.
• the second connector comprises a first end-fitting part of the tube in question, which first coupling part can be fixedly held relative to a second mating connector part which is secured to the channel of the fluid circuit, these first and second coupling parts in their fixed position relative to each other having means for ensuring the secure circulation of the fluids through the second connector.
• the first coupling part and the second coupling part comprise fastening means making them capable of being held fixed relative to each other in a manner removably by a nut.
• the first connection is a dielectric connection comprising means capable of dissipating the electrical energy generated by the movements of fluids circulating in the first and second tubes.
• Each of the opposite ends of the first and second tubes comprises a second connector having at least a portion which is formed in one piece with the opposite end of the tube considered.
• the first (3a) and second (5a) tubes and the pipe (14) are metallic.
• the invention also relates to a method for implementing the device previously described, that is to say a device which comprises a first connection ensuring the connection of a first and a second tubes, in which first connection the respective ends of the first and second tubes are arranged coaxially facing each other, in which device at least one of the opposite ends of the first and second tubes may be secured to a second coupling which is intended to connect the first or second tube to a pipe of a fluid circuit, which second connection comprises at least one portion which is made in one piece with the opposite end of the tube in question, which method comprises at least one step machining this part of the second connector at the end of the tube considered.
• FIG. 2 shows schematically a tube connecting device having a first connection for dissipating the electrical charges and two second connectors for respectively connecting the first and second tube to a not shown pipe of the fluid circuit;
• FIG. 3 is a schematic sectional view of a portion of the second connector of Figure 2 before crimping
• Figure 4 is the same view as that of Figure 3 and shows schematically in section a portion of the second connection after crimping;
• FIG. 5 shows the second connection of Figure 3 with the bolt in its position of joining the two parts of the second connection
• FIG. 6 schematically shows a tube connecting device having a first connector for dissipating the electrical charges and a second connector connecting the first tube to a pipe of the fluid circuit;
• FIG. 7 is a schematic sectional view of the second connector of Figure 6 during the crimping operation
• FIG. 8 schematically represents a tube connection device according to a first variant of the invention comprising a first connection for dissipating the electrical charges and two second connectors respectively connecting the first and second tubes to a channel of the fluid circuit;
• FIG. 9 is a sectional view of the circled portion IX of Figure 8 mainly showing the second connection after crimping;
• FIG. 10 schematically shows a tube connection device according to a second embodiment of the invention comprising a first connector for dissipating the electrical charges and two second connections respectively connecting the first and second tube to a pipe of the fluid circuit;
• Figure 1 1 is a sectional view mainly showing the second connection of Figure 10 before crimping
• FIG. 12 is a sectional view of the circled portion XII of Figure 8 mainly showing the second connection after crimping;
• FIG. 13 is a sectional view mainly showing the second connection after crimping according to a third variant
• FIG. 14 is a sectional view mainly showing the second removable type connection according to a fourth variant
• FIG. 15 is a side view showing a portion of a second removable connection according to a fifth variant.
• this connection may be the dielectric connector 1 described above or any other connection ensuring the flow of fluids, and the first 3a and second 5a tubes of which this first connection 1 has the connection.
• the respective ends 2a, 4a of these first and second tubes 3a, 5a which are held fixed relative to each other by being coaxially arranged opposite one another. way that the fluids circulated through the connection 1 has securely.
• a second connector 13 is located at the opposite end 11a of the first tube 3a. This second connector 13 connects the second tube 3a to a pipe 14 of the fluid circuit.
• a second identical connector 13a is mounted at the opposite end 12a of the second tube 5a.
• All the elements relating to the second connector 13 may be applied to the other second connector 13a secured to the second tube 5a.
• the second connector 13 comprises a female connector portion 15 which is engaged on a conjugate male connector portion 16 having a crimping zone 17 ensuring the attachment of the first tube 3a to this connecting part. male 16.
• the male connector portion 16 has a nose 26 which is extended by a shoulder 28 and a rear cylindrical portion 28a.
• the female connector portion 15 has a front portion of conical inner surface 19 bearing on the nose 26 of the male connector portion 16 and held in this position by means of a nut 18 whose inner face 29 partially marries the shoulder 28 of the male connector portion 16 and has a threaded zone 19a located at a threaded conjugate zone 19b made on the outer surface of the female connector portion 15.
• the female coupling portion 15 is in the form of a sleeve having a crimping zone 15a having two bosses 15b, 15c which, under the effect of the clamping operation of a crimping ring (not shown), can compressing the sleeve by concomitantly driving the plastic deformation of the inner surface of this female connector portion 15 at its crimping zone 15a and the deformation of the end 21 of the pipe 14.
• the crimping method used as well as the sleeve taken at the crimping zone will be described in more detail with reference to the embodiment of FIGS. 10 to 12.
• the male connector portion 16 is fitted into a female die 20.
• the end 1 1a of the first tube 2a subject of the crimping is introduced into the male connector portion 16 to a stop 22 made in the female matrix 20.
• the female die 20 comprises a base 23 which extends on the side of the male connector portion 16 by a tubular portion 24 whose inner surface 25 is conical and bears on the nose 26 of the male connector portion 16.
• a crimping ring 30 surrounds the male connector portion 16 at its shoulder 28, the inner surface 31 of the crimping ring 30 contacting the shoulder 28.
• the crimping ring 30 is actuated in displacement towards the female matrix 20. Its inner surface 31 is such that this displacement combined with the presence of the tubular part 24 of the female matrix forming the abutment of the shoulder 28 of the male coupling part 16 firstly causes axial compression of the nose 26 of the male connector portion 16 against the inner surface 25 of the female matrix 20, then radial compression of this male connector portion 16 on the first tube 2a resulting in a permanent deformation of the nose 26 of the male connector portion 16 and a shoulder crush 28 of the same male connector portion 16. These two deformations compress the first tube 2a which deforms without being able to return to its original shape from the deformation permanent of the male connector portion 16.
• the nose 26 and the shoulder 28 of the male connector portion 16 are defined as being the crimping zone 17 of the second connector 13.
• the assembly formed by the male connector portion 16 and the first tube 2a are then extracted from the female matrix 20 and the crimping ring 30 to be fitted into the female connector portion 15 as shown in FIG.
• the tube connecting device comprises, in addition to the first connector 1 a, a second connector 35 comprising a sleeve 36 and two crimping rings 37, 38.
• this second connection 35 is symmetrical in that the sleeve 36 comprises an annular central recess 39 forming an axis of symmetry XX ', this annular recess 39 being delimited by two abutments 40, 41 which extend each by an initially tubular portion 42,43 before crimping operation forming a crimping zone respectively 58a, 58b.
• the end 1 1a of the first tube 3a and the end 21 of the pipe 14 are introduced into the sleeve 36 near the annular central recess 39.
• the crimping rings 37,38 each consist of an annular insert 42,43 and an annular ring 44,45 made of different materials, for example the annular inserts 42,43 may be made of titanium and the rings Annular 44.45 made of epoxy resin reinforced with high strength graphite fibers.
• the crimping rings 37, 38 are actuated in displacement according to the arrows 46, 47.
• respective internal 54,55 annular inserts 42,43 cause the permanent deformation by radial compression of the initially tubular portions 42,43 and the concomitant deformation of the respective ends 1 1a, 21 of the first tube 3a and the pipe 14 of which this second connection 35 ensures the secure connection.
• Figures 8 and 9 illustrate a first variant of the invention.
• the second connector 60 corresponds to a part of the connection 35 of the example of FIGS. 6 and 7 along the axis of symmetry XX 'mentioned in this example. It thus includes the elements already described in the previous example, namely a sleeve 61 having a crimping zone 68, a crimping ring 62 made of an annular insert 63 and an annular ring 64, all these elements being identical to the corresponding elements of the second connection 35 of the previous example.
• the crimping operation proceeds as described for the previous example by axial displacement of the crimping ring 62 towards the stop 65 of the sleeve 61 forming the end 1 1a of the first tube 2a.
• the sleeve 61 is integral with the end 1 1a of the tube 3a.
• This sleeve 61 may for example be made by machining on the end 1 1a of the first tube 3a which is metallic.
• This variant is very advantageous since the connection of the pipe 14 to the tube 2a will require only one crimping operation instead of two according to the previous example. Furthermore, the total length of the second connector 60 is reduced by half compared to that of the second connector 35 of the previous example. And as a result, the total mass of the second connector is also decreased with a weight saving of about 45% compared to the second connector 35 of the second variant.
• the second variant shown in Figures 10 and 12 includes a second connector 70 which is in the form of a sleeve 71 also forming end 1 1a of the first tube 2a.
• the sleeve 71 of the second connector 70 has on its outer surface 72 a first annular boss 73a and a second annular boss 73b having a flat zone forming a crimping zone 79.
• the inner surface 74 of the sleeve 71 is tubular.
• the end 21 of the pipe 14 is introduced into the sleeve 71 of the second connector 70 near the first connection 1a.
• the crimping operation is carried out by means of a crimping ring
• This crimping ring 75 shown in Figure 1 1.
• This crimping ring 75 is placed opposite the sleeve 71 and is clamped so as to compress the sleeve 71 by concomitantly driving the plastic deformation of the inner surface 74 of this sleeve and the deformation of the pipe 14.
• Those skilled in the art will be able to adapt the geometry of the crimping ring to the crimping operation described above.
• the third variant is also in accordance with the principle of the first and second variants.
• the second connector 80 is in the form of a sleeve 81 machined on the end 1 1 of the first tube 3. This second connector 80 and the corresponding crimping operation is described in the publication FR 2,899,307.
• the outer surface 89 of the sleeve 81 has a series of bosses 85 forming crimping zone 87 on which is applied a radial crimping force according to the arrows 86 by a suitable tool not shown which causes a permanent deformation in compression of the sleeve 81 and which causes also a concomitant deformation of the end 21 of the pipe 14 to be connected.
• the inner surface 82 of the sleeve 81 which is in contact with the end 21 of the pipe 14 comprises a portion 83 which is glued by a multicomponent adhesive one of which is encapsulated so that before crimping, this glued portion does not exert its function glue.
• the first, second and third variants are particularly advantageous since that they reduce the mass of the second connection compared to the examples described with reference to FIGS. 2 to 6, they reduce the space generated by the presence of this second connection and can be easily made by machining at the end 11a of the first tube 3a.
• FIGS. 14 and 15 describe two embodiments which do not involve a crimping zone but a second connection made of a first coupling part and a second coupling part capable of being disconnected, which results in that second fitting is removable. Furthermore, according to the invention, one or the other of the first or second parts is formed at the end 1 1a of the first tube 3a at the output of the first connector 1a.
• the coupling portions located at the end 11a of the first tube 3a are formed by a machining operation of this end 11a of the first tube 3a.
• the second connector 90 has a first portion 91 in the form of a sleeve which is machined at the end 1 1a of the first tube 3a output of the first connector 1a.
• This first coupling portion 91 has a female frustoconical end surface 92 which coincides with the male frustoconical end surface 93 of a second coupling portion 94 machined at the end 21 of the pipe 14.
• the end surfaces 92,93 of the first 91 and second 94 parts of connection are maintained in contact support by means of a nut 95 whose inner face has a threaded zone 97 located at a threaded conjugate zone 98 made on the outer surface of the first coupling part 91.
• the tubular fluid flow zone 91a at the first coupling portion 91 and the fluid circulation tubular zone 94a at the second coupling portion 94 are coaxially disposed opposite one another in a manner that to ensure the flow of fluid through the second connector 90.
• the tightening of the nut 95 ensures the fixed retention of the first coupling portion 90 on the second coupling portion 94. On the contrary, loosening of the nut makes it possible to separate the first coupling portion 90 from the second coupling portion 94 .
• the second coupling portion comprises an annular groove 96 punctually widening the diameter of the pipe 14 and conferring on this second coupling portion 94 an elasticity allowing this second coupling portion 94 and the second coupling 90 in its entirety, to retain their properties, and in particular their sealing properties.
• the diameter of the pipe 14 is smaller than the diameter of the first pipe 3a, which necessitates the presence of a narrowing zone 99 situated at the level of the first coupling 90. It will be understood that this embodiment applies also to a configuration in which the diameters of the first tube 3a and the pipe 14 are identical. Those skilled in the art will be able to adapt the first connector 90 to such a configuration.
• the second coupling comprises a first coupling portion 100 machined at the end 11a of the first tube 3a at the outlet of the first coupling 1 a.
• This first coupling portion 100 is also in the form of a sleeve and comprises, from its end portion 101, a first frustoconical portion 102 increasing its outer diameter, a first flat surface 103, a second frustoconical portion 104 increasing its outer diameter. a second flat surface 104 and an annular groove 105 connected to the second flat surface 104 by a third frustoconical portion 105.
• the second coupling part is not shown in this figure but the skilled person will be able to adapt it to this first coupling part to form a second seal and removable connection.
• the second coupling part will comprise a frustoconical inner surface that fits and comes at least partly engage the first frustoconical portion 102 of the first coupling portion and being fixedly held in this position by means of a captive nut.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Quick-Acting Or Multi-Walled Pipe Joints (AREA)
• Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
• Joints With Pressure Members (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=42735494

Family Applications (1)

Country Status (9)

Families Citing this family (5)

Family Cites Families (25)

• 2010
  • 2010-01-20 FR FR1050350A patent/FR2955370B1/fr not_active Expired - Fee Related
• 2011
  • 2011-01-19 US US13/574,172 patent/US20130020800A1/en not_active Abandoned
  • 2011-01-19 CN CN2011800119706A patent/CN102812278A/zh active Pending
  • 2011-01-19 CA CA2787605A patent/CA2787605A1/fr not_active Withdrawn
  • 2011-01-19 RU RU2012135593/06A patent/RU2012135593A/ru not_active Application Discontinuation
  • 2011-01-19 EP EP11706300A patent/EP2526328A1/de not_active Withdrawn
  • 2011-01-19 JP JP2012549399A patent/JP2013517436A/ja active Pending
  • 2011-01-19 BR BR112012018002A patent/BR112012018002A2/pt not_active IP Right Cessation
  • 2011-01-19 WO PCT/FR2011/050090 patent/WO2011089353A1/fr active Application Filing

Non-Patent Citations (1)

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