CN105492816A - Hose Couplings and Associated Hoses - Google Patents

Abstract

The invention relates to a hose having at least one tubular cover (20) and at least one tensile armour layer (24, 25) arranged on the outside relative to the tubular cover (20). The armour layers (24, 25) have a plurality of filamentary armour elements (29), the joint (14) having: a plurality of end sections (34) of each armouring element (29); an end arch (50) and a cover (51) fixed to the end arch (50), the end arch (50) and the cover (51) defining a chamber (52) therebetween for receiving the end section; 3 and 3 at 3 least 3 one 3 fastening 3 abutment 3 ( 3 62 3, 3 64 3) 3 of 3 each 3 armour 3 layer 3 ( 3 24 3, 3 25 3) 3 fixedly 3 mounted 3 along 3 the 3 axis 3 ( 3 a 3- 3 a 3' 3) 3 of 3 the 3 hose 3 with 3 respect 3 to 3 the 3 end 3 arch 3 ( 3 50 3) 3 and 3 / 3 or 3 with 3 respect 3 to 3 the 3 cover 3 ( 3 51 3) 3. 3 Each end section (34) is fastened to a fastening abutment (62, 64) by means of a pivot or ball joint.

Description

Hose Couplings and Associated Hoses

technical field

The invention relates to a connection for a fluid conveying hose, the hose having at least one tubular covering and at least one tensile armoring layer arranged on the outside relative to the tubular covering, the tensile armoring having a plurality of filamentary armoring elements , the connector has:

- multiple end sections per armor element,

- an end arch and a cover fixed to the end arch, between which a cavity is defined for receiving the end segment,

- At least one fastening support for fastening each layer of armor, fixedly mounted along the hose axis relative to the end arch and/or relative to the cover.

In particular, the hose is of the "unbonded" type for transporting hydrocarbons across bodies of water such as seas, oceans, lakes or rivers.

Background technique

Such a hose is made, for example, according to the standard documents API17J (Specification for Unbonded Flexible Pipe: Technical Specification for Unbonded Flexible Pipe) and APIRP17B (Recommended Practice for Flexible Pipe: Recommended Practice for Flexible Pipe) formulated by the American Petroleum Institute.

Hoses are generally formed from a series of concentrically stacked layers. A hose is considered an "unconstrained" hose in the sense of the present invention, since at least one layer of the hose is adapted to move longitudinally relative to an adjacent layer when the hose is bent. In particular, an unconstrained hose is a tube that has no adhesive material connecting the layers forming the hose.

Hoses are generally arranged across the body of water between subsea units for collecting fluids produced at the bottom of the body of water and surface units, floating or fixed, for collecting and distributing fluids. Surface units can be semi-submersible platforms, FPSOs or other floating units.

In some cases, for the production of fluids in deep waters, the length of the hose is greater than 800 meters. The hose ends have connectors for connection to underwater units, connection to surface units, and intermediate connections.

These hoses are subject to high axial tension, especially when the water in which the hose is deployed is deep.

In this case, the upper joints connecting the hoses to the surface installations must withstand high axial tensions, which may reach hundreds of tons. These tensile forces are transmitted to the joint by a couches d'armures detraction extending along the hose.

Axial tension not only has a high average value, but also has a permanent variation according to the vertical movement of the surface unit and the hose under the action of disturbance of the water caused by waves or swells.

Axial tensions can vary by tens of tons and persist throughout the life of the hose. Thus, in 20 years, the number of cycles can be more than 20 million.

Therefore, a particularly strong fixation between the tensile armor layer and the joint body must be ensured.

For this reason, in the known joints, the fastening of the armor is generally ensured by the friction between the armor wires and the epoxy cast in the cavity delimited by the arch and the cover.

In addition, the capstan effect associated with the helical trajectory of the armor wire also contributes to the fastening of the armor, changing the diameter of the helix formed by the armor wire in the joint relative to the diameter of the armor wire helix over the usual length, e.g. along This effect is amplified by progressively increasing the diameter on the ascending cone and then decreasing the diameter along the descending cone.

Additionally, a hook or wave or twist deformation may be formed at the end of each armor filament to be bonded into the epoxy to achieve a mechanical lock against applied tension. These deformations trigger the forces required to create the capstan effect.

Sometimes, over time, the fastening of tensile armor pieces can become fatigue-failed.

In particular, this failure occurs at wavy deformations where the wires forming the armor have been severely deformed.

To solve this problem, WO2004/051131 proposes a fitting of the aforementioned type, in which the armor wire is helically exiting the axis of the hose to be inserted into an end support having a diameter greater than that in the usual length The diameter of the shell defined by the armor wire in the hose.

In addition, the end of each armor wire is inserted into a chute defined in the support, in which the end of the armor wire is secured by inserting a wedge through the wire to locally increase its diameter .

The resin is then cast in a chute to fully secure the wire ends from any degrees of freedom.

Such joints are not entirely satisfactory. Insertion of wedges in the thickness of the armor wires to secure the wires and complete fixation of the ends of the wires may produce fatigue failure at the leading end of each wire.

Failure may also occur in the rear section at the armor separation area, relative to the diameter over the usual length, which otherwise becomes embrittled when installed due to armor buckling required to accommodate the joints.

Contents of the invention

It is therefore the object of the present invention to obtain a hose connection which is effective in absorbing axial tension, in which the risk of fatigue failure, especially in the armor end section, is considerably reduced and which is simple to assemble.

To this end, the invention is directed to a joint of the aforementioned type, characterized in that each end section is fastened on a fastening seat by a pivot joint or a ball joint.

A joint according to the invention may have one or more of the following features considered individually or in any technically feasible combination:

- the end sections of the armor elements of each armor layer define a cylindrical shell whose diameter is substantially constant over the entire length of the joint;

- the receiving chamber is free of fillers to embed the end sections;

- for each end section, the fastening support has a radially protruding connecting piece on which the end section is mounted;

- the fastening support has a peripheral flange and at least one bracket projecting axially from the peripheral flange, on which each connecting element is mounted;

- the fastening support has a first inner bracket and a second outer bracket arranged around the first inner bracket, each connecting piece being mounted on the first inner bracket and the second outer bracket;

- each end segment has an elongated portion and a securing member attached transversely to the elongated portion, the securing member being engaged on the connector;

- the fastening member has a base fixed to the elongated part and a head projecting axially beyond the free end of the elongated part;

- the maximum width of the fastening member measured perpendicular to the axis of the elongated part is less than or equal to the maximum width of the elongated part over the length of the elongated part receiving the fastening member;

- the elongated portion is flat, the elongated portion has a first surface and a second surface opposite the first surface, the fastening member is attached to the first surface and not attached to the second surface;

- the connection and/or fastening member has a pin;

- the connecting piece and/or fastening member has a ball head;

- the joint has sealing means sealing around the tubular cladding, the sealing means being axially staggered on the front side of said fastening support;

- the joint has: a plurality of end sections of the armor element of the first armor layer of the first cylindrical shell defining a substantially constant diameter over the entire length of the joint; and defining a substantially constant diameter over the entire length of the joint , and a plurality of end sections of the armor elements of the second armor layer of the second cylindrical shell having a diameter greater than the diameter of the first cylindrical shell,

and the joint has a first fastening seat for fastening the first armor layer, the first fastening seat is fixedly mounted relative to the end arch and/or relative to the cover along the axis of the fluid conveying hose, each end section of the armoring element of the first armoring layer is fastened to the first fastening support by means of a pivot joint or a ball joint,

The joint has a second fastening seat for fastening the second armor layer, the second fastening seat is fixedly mounted relative to the end arch and/or relative to the cover along the axis of the fluid conveying hose, the second Each end section of the armoring element of the two armoring layers is fastened on the second fastening support by means of a pivot joint or a ball joint.

The invention also aims at a fluid conveying hose, characterized in that it has:

- Tubular cladding;

- at least one tensile armor layer arranged on the outside with respect to the tubular cladding, the tensile armor layer having a plurality of filamentary armor elements;

- The above-mentioned joint, which is mounted on the end of the tubular cladding.

A hose according to the invention may have one or more of the following characteristics considered individually or in any technically feasible combination:

- each armor layer defines a central cylindrical shell of substantially constant diameter in the middle section adjacent to the joint, the end sections of the armor elements of each armor layer defining a diameter substantially equal to the middle diameter over the entire length of the joint Cylindrical Shell The diameter of the cylindrical shell.

Description of drawings

The invention will be better understood by reading the following description, given by way of example only, with reference to the accompanying drawings, in which:

- Figure 1 is a partially cut-away perspective view of a first hose according to the invention;

- Figure 2 is a partially cut-away perspective view of the joint of the hose shown in Figure 1;

- Figure 3 is a partial perspective view of the end section of the armored element fixed in the joint shown in Figure 2;

- Figure 4 is a three-quarter perspective view of the end of the armor element in the joint shown in Figure 2;

- Figure 5 is a view similar to Figure 3 of the connection of the second hose according to the invention;

- Figure 6 is a view similar to Figure 4 of the end of the armoring element in the joint of a third hose according to the invention.

detailed description

In the following, the expressions "outer" and "inner" are generally understood as radially relative to the axis A-A' of the hose, the expression "outer" is understood as being radially farther from the axis A-A', the expression " Inner" should be understood as being radially closer to the axis AA' of the hose.

The expressions "front" and "rear" are to be understood axially with respect to the axis A-A' of the hose, and the expression "front" is to be understood as being relatively farther from the middle of the hose and closer to the ends of the hose One, the expression "rear" should be understood as one of the ends of the hose that is relatively closer to the middle of the hose and farther away. The middle of the hose is the point of the hose equidistant from its two ends.

A first hose 10 according to the invention is partially shown in FIG. 1 .

The hose 10 has a central section 12 which is partially shown in FIG. 1 . The hose has at each axial end of the central section 12 an end fitting 14 (not shown in FIG. 1 ), the relevant parts of which are shown in FIG. 2 .

Referring to FIG. 1 , the hose 10 defines a central passage 16 for fluid, advantageously petroleum, to communicate. A central channel 16 extends along axis AA′ between the upstream and downstream ends of the hose 10 . The central channel opens through the joint 14 .

The hose 10 is intended to be arranged through a body of water (not shown) in production installations for fluids, especially hydrocarbons.

A body of water is, for example, a sea, a lake or an ocean. The depth of the water area facing the fluid production equipment is, for example, between 500 meters and 3000 meters.

The fluid production plant has a (not shown) subsea installation and, in particular, a floating surface installation, which are generally connected to each other by a hose 10 .

Preferably, hose 10 is an "unbonded" hose.

At least two adjacent layers of hose 10 are free to move longitudinally relative to the other layer when the hose is bent.

Advantageously, all layers of the hose are free to move relative to each other. Such hoses are proposed, for example, in the standard documents API17J and APIRP17B published by the American Petroleum Institute (API).

As shown in FIG. 1 , the hose 10 defines a plurality of concentric layers about an axis AA' that extend continuously along a central section 12 up to a fitting 14 at the end of the hose.

According to the invention, the hose 10 has at least one first tubular coating 20 based on a polymer material, which advantageously constitutes a pressure coating.

The hose 10 also has at least one tensile armor layer 24 , 25 which is arranged on the outside with respect to the first covering layer 20 .

Advantageously, the hose 10 also has an inner skeleton 26 arranged within the pressure sheath 20, interposed between the pressure sheath 20 and said tensile armor layers 24, 25, depending on the desired use. The pressure arch 28 and the outer covering 30 for protecting the hose 10 .

As is known, the pressure cladding 20 serves to hermetically contain the fluid conveyed in the channel 16 . The pressure cladding is formed from a polymer material, for example based on polyolefins such as polyethylene, on polyamides such as PA11 or PA12, or on fluorinated polymers based on polyvinylidene fluoride (PVDF).

The thickness of the pressure cladding layer 20 is, for example, between 5 mm and 20 mm.

When present, the skeleton 26 is formed, for example, by winding a special-shaped metal foil in a helical shape. Advantageously, the helical turns of the metal foil are clipped to each other, which allows radial compression forces to be taken up.

In this embodiment, a skeleton 26 is disposed within the pressure cladding 20 . The hose is therefore referred to by the English term "roughbore" due to the geometry of the skeleton 26 .

In a variant (not shown), the hose 10 has no inner skeleton 26, the hose is then designated by the English term "smoothbore".

The helical rolls of the profiled metal foil forming the skeleton 26 are of short pitch, ie they have a helix angle close to 90° in absolute value, typically between 75° and 90°.

In this embodiment, the pressure arches 28 serve to take up the forces associated with the pressure prevailing within the pressure cladding 20 . For example, the pressure arch is formed by a metal profiled wire wound helically around the cladding 20 . Profiled yarns generally have complex geometries, especially Z-, T-, U-, K-, X- or I-shape.

The pressure arch 28 is wound helically around the pressure cladding 20 with a short pitch, ie a helix angle close to 90° in absolute value, typically between 75° and 90°.

The hose 10 according to the invention has at least one armor layer 24 , 25 formed by helically winding at least one elongate armor element 29 .

In the embodiment shown in FIG. 1, the hose 10 has a plurality of armor layers 24, 25, in particular an inner armor layer 24 and an outer armor layer 25, the inner armor layer 24 being pressed against a pressure arch 28 (or when the arch 28 is absent, the inner armor is pressed against the cladding 20 ), while the outer cladding 30 is arranged around the outer armor 25 .

Each armor layer 24, 25 has a longitudinal armor element 29 wound with a long pitch around the axis AA' of the hose.

The so-called "long pitch winding" means that the absolute value of the helix angle is less than 60°, typically between 25° and 55°.

The armor elements 29 of the first layer 24 are generally wound at opposite angles relative to the armor elements 29 of the second layer 25 . Thus, if the wrapping angle of the armoring elements 29 of the first layer 24 is equal to +α, where α is between 25° and 55°, then the armoring of the second armoring layer 25 arranged in contact with the first armoring layer 24 The wrapping angle of the element 29 is, for example, equal to -α°.

The armoring element 29 is formed, for example, from metal wires, in particular steel wires, or from composite material strips, for example carbon fiber reinforced strips.

As will be described below, the armor elements 29 each have an end section 34 inserted in the joint 14 . The end section 34 extends as far as a free end arranged in the connection 14 . Advantageously, the end segment has a helical or quasi-helical trajectory in the joint 14 with axis AA′.

As shown in FIG. 4 , each end section 34 has an elongated portion 35 for reinforcement and a securing member 36 attached transversely to the elongated portion 35 .

In the embodiment shown in FIG. 4 , the elongated portion 35 extends over the entire length of the armoring element 29 . The elongated portion has a substantially flat shape. The elongated portion defines an outer surface 37 to which the securing member 36 is attached and an inner surface 38 opposite the outer surface 37 .

The fastening member 36 is fixed on the elongated part 35 without openings in the elongated part 35, for example by soldering, soldering, crimping or gluing.

The securing member 36 extends along the axis BB′ of the elongated portion 35 . The maximum width of the fastening member measured perpendicular to this axis BB′ is advantageously smaller than or equal to the width of the elongated portion 35 .

However, the maximum width of the fastening member may be greater than the width of the elongated portion 35 in the case of large lateral gaps between the end sections 34 of the armoring element 29 .

The fastening member 36 has a base 39 which presses transversely against the elongated portion 35 and a fastening head 40 which protrudes longitudinally beyond the end of the elongated portion 35 .

The maximum height of the base 39 measured perpendicular to the axis BB′ from the outer surface 37 is greater than the thickness of the base 39 .

The height of the base 39 decreases from the head 40 on the front side towards the rear.

The fastening head 40 is spaced apart from the axis BB' and extends parallel to this axis. The fastening head defines together with the base 39 a recess 41 for the clamping of the end section 34 .

The tightening head internally defines a radial transverse channel 42 for insertion of the fixing, as described below.

Referring to FIG. 1 , the outer covering layer 30 is used to prevent fluid from penetrating the hose 10 from the outside to the inside. The outer cladding is advantageously made of a polymer material, especially based on polyolefins such as polyethylene, on polyamides such as PA11 or PA12, or on fluorinated polymers such as polyvinylidene fluoride (PVDF) .

The thickness of the outer cladding layer 30 is, for example, between 5 mm and 15 mm.

As shown in FIG. 2 , each joint 14 has an end arch 50 and an outer connection cover 51 projecting axially rearwardly from the arch 50 . The cap 51 together with the end dome 50 delimits a cavity 52 for receiving the end section 34 of the armoring element 29 .

The joint 14 also has a front seal 54 that seals around the tubular wrap 20 , and a rear seal 56 that seals around the outer wrap 30 , partially shown in FIG. 2 .

According to the invention, for each armoring layer 24, 25, the joint 14 also has a fastening seat 62, 64 for fastening each end section 34 of the armoring element 29 of said layer 24, 25 , the fastening support is adapted to fasten each end section 34 with at least one rotational degree of freedom free to rotate about the radial axis CC'.

Joint 14 is advantageously free of solid fillers that fill cavity 52 . In this way, the end section 34 is free to move laterally at the rear portion of the fitting 14, thereby reducing the mechanical stress to which the end section is subjected when the hose 10 is subjected to large changes in tension and/or curvature.

In this embodiment, the end arch 50 is used to allow the connection of the hose 10 to another coupling 14 or terminal equipment, advantageously via an end flange (not shown).

The end arch 50 has a central hole for receiving the end of the first covering layer 20 to allow the fluid flowing through the central channel 16 to flow out of the hose 10 .

The cover 51 has a tubular peripheral wall 70 extending around the axis AA'. The peripheral wall 70 has a front edge 71 secured to the end arch 50, spaced radially from the armor layers 24, 25, and a rear edge 72 extending axially rearwardly over the end arch. Out of shape 50.

A chamber 52 is delimited radially outwards by a cover 51 . The cavity 52 is bounded axially forwardly by the rear surface 73 of the end arch 50 .

Front sealing means 54 are advantageously located on the front side of joint 14 , in contact with arch 50 . In the embodiment shown in FIG. 2 , the front seal 54 is axially offset forward relative to each fastening seat 62 , 64 .

As is known, the front seal has a locking collar 76 and a front crimp ring (not shown) for engagement on the pressure cladding 20 .

In the embodiment shown in FIG. 1 in which the hose 10 has a pressure arch 28 , the front seal 54 also has an intermediate stop ring (not shown) which stops the pressure arch 28 . The middle snap ring is interposed between the front crimp ring and the locking band 76 .

The rear seal 56 is arranged at the rear of the joint 14 . The rear sealing device has at least one rear crimping ring 80 for crimping the outer cladding 30 and a rear locking band 82 for locking the rear crimping ring 80, the rear locking band 82 is fixed on the cover 51, advantageously It is fixed at the rear edge 72 of the peripheral wall 70 .

In the embodiment shown in FIG. 2 in which the hose 10 has an inner armor 24 and an outer armor 25, the coupling 14 has a front fastening seat 62 and a tight fitting that fasten the end section 34 of the inner armor 24. The rear fastening support 64 of the end section 34 of the outer armor layer 25 is fixed, and the rear fastening support 64 is axially staggered relative to the front fastening support 62 .

Each fastening seat 62 , 64 is axially fixed at least from front to rear relative to the cover 51 and to the arch 50 , for example by cooperating with a circumferential stop 88 defined by the cover 51 .

2 and 3, each fastening support 62, 64 has a peripheral flange 90, a peripheral bracket 92 protruding relative to the peripheral flange 90, and a plurality of radial brackets fixedly mounted on the bracket 92 along the axis AA'. Fixing piece 94.

Each flange 90 extends around an axis AA'. When present, the flange defines an inner opening 96 for the passage of the first cladding layer 20 and the pressure arch 28 .

The rear surface 98 of the flange 90 is snapped onto the stop 88 provided in the cover 51 so that the fastening mounts 62, 64 are fixed against rearward translation along the axis AA'.

Perimeter bracket 92 advantageously projects rearwardly from flange 90 around inner opening 96 . The perimeter bracket defines an outer shoulder 100 for capturing each end section 34 .

As will be described below, the outer shoulders 100 are configured to hold each end section 34 mounted on the fastening mounts 62, 64 on a cylindrical shell having a diameter substantially over the entire length of the joint 14. constant.

By "substantially constant in diameter", it is advantageously meant that the trajectory of each end section 34 inside the joint 14 is between two cylinders 24, 25 whose diameters are respectively equal to 0.9xD and 1.2xD , D is the average diameter of the armor layers 24 , 25 corresponding to the end section 34 over the usual length in the middle section 12 of the hose outside the connection 14 .

Preferably, each end segment 34 inside the joint 14 traces between two cylinders 24, 25 having diameters respectively equal to D and 1.15xD, D being the corresponding end on the usual length The average diameter of the armor layers 24 , 25 of the segment 34 .

Advantageously, the separation distance of each end section 34 from the axis AA' remains constant, or the distance increases monotonically between the rear part of the joint 10 and the fastening member 36, remaining between the two aforementioned cylinders. between.

For each end section 34 fastened to the support 62 , 64 , the support 62 , 64 has a corresponding fastening element 94 for the end section 34 . Advantageously, therefore, the number of fastening elements 94 corresponds to the number of end sections 34 fastened to the supports 62 , 64 .

Each fixing piece 94 is installed on the bracket 92 . In the embodiment shown in FIG. 3, each fixing member 94 passes through the bracket 92 and protrudes on both sides of the bracket.

Each fixing member 94 extends substantially radially with respect to the axis AA′ of the hose 10 .

The circumferential space between two adjacent fixings 94 is greater than the maximum width of each head 40 of the fastening member 36 , advantageously greater than the width of the elongated portion 35 of the end section 34 .

As shown in FIG. 3 , each securing member 36 of the end section 34 is engaged on a mount 94 .

In particular, the retainer 94 is received in the transverse channel 42 provided through the head 40 . The head 40 bears against the shoulder 100 . The shoulder 100 is received in the groove 41 .

In the embodiment shown in FIG. 3 , each securing member 36 is freely rotatably mounted about a radial axis CC′ defined by the mount 94 .

Thus, when the end section 34 is fastened on the fastening mounts 62 , 64 , the end section is free to pivot in the chamber 52 about at least one radial axis CC′.

In this way, the tension exerted by the sheathing element 29 can be taken up without the end section 34 becoming lodged in the fastening region. Therefore, the fatigue resistance of the joint 14 is improved.

Furthermore, since each fixing 94 is bonded to a single end section 34, the positioning of the end sections 34 of the armoring element 39 is made entirely in the fastening area.

According to this arrangement, for each armoring layer 24, 25, the end section 34 of the armoring element 29 follows substantially the same pitch and helical diameter as the armoring element in the middle section 12 of the hose 10. and the same helical diameter, arranged in a helical shape parallel to each other.

Thus, the end section 34 defines a cylindrical shell whose diameter is substantially constant throughout the length of the joint 14 .

For each armor layer 24 , 25 , the diameter of the cylindrical shell is substantially the same as the diameter of the intermediate cylindrical shell defined by the armor element 29 in the middle section 12 of the hose 10 .

By "substantially the same", it is advantageously meant that the difference between the mean diameter of the cylindrical shell defined by the end sections 34 and the diameter of the middle cylindrical shell is less than 15% of the mean diameter of the cylindrical shell defined by the end sections 34 .

In this way, the risk of winding and/or unwinding of the armoring element 29 is limited in the event of large tension changes, since there is no taper in the joint to increase or decrease the diameter of the shell defined by the end section 34 .

Thus, the armoring element 29 and its end sections 34 remain in their initial state without a change in geometry and thus without a change in their state of stress.

Thus, it is no longer necessary to bend/unfold the armoring element 29 , a simple lifting of the armoring element 29 is necessary to insert the fastening supports 62 , 64 .

In addition, fastening occurs by cooperation between the fasteners 94 on each fastening mount 62 , 64 and the fastening member 36 , thereby eliminating the need for detents, twists or corrugations on the end sections 34 , thereby improving the fatigue resistance of the joint 14.

When equipped with rear locking elements, the armoring elements 29 of the armoring layers 24 , 25 are wound helically with the same helix radius as the armoring elements at the central section 12 .

The assembly of the joint 14 according to the invention is carried out as follows.

The different layers of the hose 10 are initially cut to suitable lengths so that a free end section 34 of each armor element 29 of the armor layers 24 , 25 emerges on the arch 28 .

Each free end section 34 has no radial deformation, in particular no wave or hook deformation.

The various components making up the rear seal 56 are then inserted around the outer cladding 30 .

Each end section 34 is then provided with a fastening member 36 attached at its free end 34 to the elongated portion of the end section by soldering, soldering, gluing or crimping 35 on.

Each fastening mount 62 , 64 is then joined around the first cladding layer 20 .

In the embodiment shown in FIG. 2 , the assembly formed by the peripheral flange 90 and bracket 92 of the rear support 64 is first inserted around the end section 34 of the inner armor layer 24 .

The end section 34 of the outer armor layer 25 is then lifted slightly away from the axis AA', advantageously without bending the end section back, so that the bracket 92 is inserted in the head 40 of the end section 34 under.

Then, for each end section 34 , a fastener 94 is inserted through the transverse channel 42 provided in the fastening member 36 and through the bracket 92 .

Thus, each end segment 34 is axially fixed on the fastening seat 64 and has the freedom to turn freely about the radial axis CC'.

The assembly formed by the peripheral flange 90 of the front support 62 and the bracket 92 is then inserted around the first cladding 20 and (where present) the pressure arch 28 .

The end section 34 of the inner armor layer 24 is slightly raised away from the axis AA', advantageously without being bent back, so that the bracket 92 is inserted under the head 40 of the end section 34 .

Thus, for the end sections 34 of the inner armor layer 24, the above-described operation of fixing each fixing piece 94 is repeated.

The components of the front seal 54 , the arch 50 and the outer connection cover 51 are then placed in position to capture each fastening seat 62 , 64 against translation along the axis AA′.

Advantageously, no filler is introduced into chamber 52 . Therefore, the installation time of the joint 14 is shortened.

In operation, when the joint 14 is connected to another joint or to a surface device, the axial tension transmitted by the armor layers 24, 25 from the weight of the hose 10 is taken up by the end section 34, and then passed through The cooperation between the fixture 94 and the fastening member 36 allowing a rotational degree of freedom about the radial axis CC′ is taken over by the fastening seats 62 , 64 .

Fastening is achieved very efficiently and with a short fastening length, which is reduced to the longitudinal dimension of the mounts 62 , 64 and the longitudinal dimension of the fastening member 36 .

The connection 14 of the second hose 120 according to the invention is shown in FIG. 5 .

The difference from the connection 14 shown in FIG. 3 is that this connection 14 shown in FIG. 5 has an additional peripheral support 122 which is arranged outside the peripheral support 92 .

An intermediate annular space 124 is defined between the brackets 92 , 122 for the insertion of the securing member 36 .

Each fastener 94 is sequentially inserted through the additional peripheral bracket 122 , the transverse channel 42 of the fastening member 36 and the peripheral bracket 92 .

This configuration accommodates higher tensions, limiting shear stress at each anchor 94 .

In the variant shown in FIG. 6 , a ball joint is formed between each end section 34 and the fastening seat 62 , 64 .

To this end, each head 40 is provided with a ball 130 for engagement on the fixing part 94 .

The ball-and-socket joint present between each end section 34 and the fastening seat 62, 64 allows a tuile change in the fastening area relative to the pivot joint system.

Thus, the end section 34 of the armoring element 29 inserted in the joint 14 is free to assume a configuration as close as possible to that of the usual length of armoring element 29 present in the middle section 12 .

Thus, only axial movement of the armoring element 29 is prevented. Furthermore, the fatigue resistance of the assembly between each fastening member 36 and the elongated portion 35 is better since it is subjected to an alternation of pure tension.

In another variant, a flexible packing is arranged in the chamber 52 , advantageously serving to protect the end section 34 from corrosion.

The filler allows the rotational movement of the end section 34 about each axis C-C' in the fastening area.

The filler is, for example, flexible polyurethane, which is introduced into the chamber 52 in liquid form and cures in situ.

In another variant, each fastening abutment 62 , 64 is screwed directly onto the end arch 50 .

Claims (16)

1. a joint (14), for connecting fluid-conveying hose (10), fluid-conveying hose (10) has the clad (20) of at least one tubulose and is arranged at least one tension armor (24 in outside relative to the clad (20) of tubulose, 25), tension armor (24,25) have multiple thread armouring element (29), joint (14) has:

Multiple end segments (34) of-each armouring element (29),

-end arched member (50) and the housing (51) be fixed on end arched member (50), the receiving chamber (52) receiving end segments is defined between end arched member (50) and housing (51)

-for fastening each tension armor (24,25) at least one fastening feet (62,64), fastening feet fixedly mounts along the axis (Α-Α ') of fluid-conveying hose (10) relative to end arched member (50) and/or relative to housing (51)

It is characterized in that, each end segments (34) is fastened on fastening feet (62,64) by pivot joint or ball joint.

2. joint according to claim 1 (14), it is characterized in that, each tension armor (24,25) end segments (34) of armouring element (29) limits cylindrical housings, diameter substantially constant in the whole length of joint (14) of cylindrical housings.

3. joint according to claim 1 and 2 (14), is characterized in that, receives chamber (52) not have the filler of embedding end segments (34).

4. according to joint in any one of the preceding claims wherein (14), it is characterized in that, for each end segments (34), fastening feet (62,64) have the link (94) of radial protrusion, end segments (34) is arranged on link (94).

5. joint according to claim 4 (14), it is characterized in that, fastening feet (62,64) at least one support (92) having circumferential flange (90) and axially protrude out from circumferential flange (90), each link (94) is arranged on support (92).

6. the joint (14) according to claim 4 or 5, it is characterized in that, fastening feet (62,64) the second support arm (122) having the first inner support (92) and arrange around the first inner support (92), each link (94) is arranged on the first inner support (92) and the second support arm (122).

7. the joint (14) according to any one of claim 4 to 6, it is characterized in that, the securing structure (36) that each end segments (34) has elongated portion (35) and is laterally attached on elongated portion (35), securing structure (36) is bonded on link (94).

8. joint according to claim 7 (14), it is characterized in that, securing structure (36) has the base portion (39) be fixed on elongated portion (35) and the head (40) axially protruded out outside the free end of elongated portion (35).

9. the joint (14) according to claim 7 or 8, it is characterized in that, the Extreme breadth that the axis perpendicular to elongated portion (35) (Β-Β ') of securing structure (36) is measured is less than or equal to the Extreme breadth of the elongated portion (35) in elongated portion (35) length of receiving securing structure (36).

10. the joint (14) according to any one of claim 7 to 9, it is characterized in that, elongated portion (35) is in flat, elongated portion (35) has first surface (37) and the second surface (38) relative with first surface (37), securing structure (36) is attached on first surface (37), and is not attached on second surface (38).

11. joints (14) according to any one of claim 4 to 10, it is characterized in that, link (94) and/or securing structure (36) have pin.

12. joints (14) according to any one of claim 4 to 10, it is characterized in that, link (94) and/or securing structure (36) have bulb (130).

13. according to joint in any one of the preceding claims wherein (14), it is characterized in that, the joint clad (20) had around tubulose carries out the seal arrangement (54) sealed, seal arrangement in the front side shaft of fastening feet (62,64) to staggering.

14. according to joint in any one of the preceding claims wherein (14), it is characterized in that, joint has: multiple end segments (34) of the armouring element (29) of the first tension armor (24), the first cylindrical housings of substantiallyconstant diameter in the whole length being limited to joint (14); And the second multiple end segments (34) of armouring element (29) of tension armor (25), substantiallyconstant diameter in the whole length being limited to joint (14) and diameter are greater than the second cylindrical housings of the diameter of the first cylindrical housings

Be further characterized in that, joint (14) has the first fastening feet (62) for fastening first tension armor (24), first fastening feet fixedly mounts relative to end arched member (50) and/or relative to the axis (Α-Α ') of housing (51) along fluid-conveying hose (10), each end segments (34) of the armouring element (29) of the first tension armor is fastened on the first fastening feet (62) by pivot joint or ball joint

Joint has the second fastening feet (64) for fastening second tension armor (25), second fastening feet fixedly mounts relative to end arched member (50) and/or relative to the axis (Α-Α ') of housing (51) along fluid-conveying hose (10), and each end segments (34) of the armouring element (29) of the second tension armor (25) is fastened on the second fastening feet (64) by pivot joint or ball joint.

15. 1 kinds of fluid-conveying hoses (10; 120; 130), it is characterized in that, fluid-conveying hose has:

The clad (20) of-tubulose,

-at least one tension armor (24,25), tension armor is arranged in outside relative to the clad (20) of tubulose, and tension armor (24,25) has multiple thread armouring element (29),

-according to joint in any one of the preceding claims wherein (14), jiont treatment is in the end of the clad (20) of tubulose.

16. fluid-conveying hoses according to claim 15, it is characterized in that, each tension armor (24,25) in the middle part (12) adjacent with joint (14), limit the intermediate cylindrical housing of substantiallyconstant diameter, the end segments (34) of the armouring element (29) of each tension armor (24,25) determines at the whole length limit of joint (14) cylindrical housings that diameter equals the diameter of intermediate cylindrical housing substantially.