Large diameter in-line sealing device including sealing plates

Abstract

The present invention provides a sealing plate (2) movable in a plane (P) between a sealing position for blocking the flow of a fluid and a flow position for allowing the flow of said fluid; a body (5) including a first half (6) and a second half (7) respectively arranged on either side of said plane (P); a clamping / disengaging system (10) for clamping and disengaging at least one clamping element (11) relative to said sealing plate (2); The present invention relates to an in-line sealing device (1) including: According to the present invention, the clamping / separating system (10) includes a first thrust ring (13), a second thrust ring (14), and at least one assembly (15) elastically deformable by compression, the assembly (15) including a coil spring (16) and a guide shaft (17), the at least one assembly (15) being disposed between the first thrust ring (13) and the second thrust ring (14).

Description

[Technical Field]

[0001] The present invention relates to the field of in-line sealing devices, which are generally intended to be placed on a pipe or duct and allow fluid to flow or be stopped within the pipe or duct by means of a sealing plate. [Background technology]

[0002] In a known manner, such a sealing plate may be translationally or rotationally movable relative to the body of the in-line sealing device, which is described in particular in documents FR 3 041 407, FR 3 051 878 and FR 3 080 665.

[0003] Known in-line sealing devices include clamping / separating means for simultaneously clamping the first half and the second half against the sealing plate and, conversely, separating them.

[0004] Such in-line sealing devices are designed for small and average size pipes, e.g., with a fluid flow cross section of 1300 mm (millimeters) or less in diameter. These in-line sealing devices require that the pipe can be elastically deformed by a clamping / separating means that is typically manually actuated by an operator.

[0005] However, for larger pipe sizes, for example, fluid flow cross sections greater than 1300 mm (millimeters) in diameter, other types of in-line sealing devices have been developed which do not require elastically deformable pipes.

[0006] This type of in-line sealing device for large pipe dimensions includes a clamping / disengaging system for clamping and conversely disengaging at least one clamping component that can move relative to the body according to at least one degree of freedom for translational movement, such degree of freedom of translational movement of the clamping component(s) being oriented in a direction of translation parallel to the direction of fluid flow in the body of the sealing device.

[0007] Such a body comprises a first half and a second half which always remain stationary relative to each other, while the clamping part translates in a translational direction to clamp or release the sealing plate as required.

[0008] One or more clamping parts are arranged between the sealing plate and one of the halves, hereinafter referred to for simplicity as the first half, although of course this or these movable clamping parts could alternatively be arranged between the sealing plate and the second half.

[0009] In particular, the clamping / separating system may include a torsionally deformable loaded U-spring to transmit a compressive force to one or more clamping components depending on the translation direction.

[0010] However, if one of the U-shaped springs breaks, the in-line sealing device must be removed from the duct and completely disassembled to replace the broken spring.

[0011] Such maintenance procedures are particularly complex and time consuming given the size and substantial weight of this type of in-line sealing device.

[0012] Documents French Patent No. 1 357 657, German Patent No. 2 227 386 and German Patent No. 2 719 164 disclose gas valves for large cross-section pipes which include a stop valve consisting of a seat and a closing piece.

[0013] Additionally, these valves include a clamping / unclamping system for clamping and conversely unclamping the translatable clamping components, which may include a plurality of assemblies that are elastically deformable under compression and are evenly spaced azimuthally around the translation direction of the clamping components, each assembly including a coil spring and a guide shaft.

[0014] However, as with systems including U-springs, if one of the coil springs breaks, the in-line sealing device must be removed from the duct and completely disassembled to allow the broken spring to be replaced. Summary of the Invention [Problem to be solved by the invention]

[0015] The object of the present invention is therefore to propose an alternative in-line sealing device with at least one clamping part that is translatably movable. Indeed, one object of the present invention is to provide a solution that makes it possible to carry out maintenance operations on the clamping / disengaging system of such type of in-line sealing device simply and quickly. [Means for solving the problem]

[0016] As previously disclosed, the present invention therefore provides an in-line sealing device comprising: a sealing plate movable in a plane (P) between a sealing position for preventing fluid flow in an interior zone of the in-line sealing device and a flow position for allowing fluid flow in the direction of the fluid flow, the sealing plate including a solid portion for preventing fluid flow and a perforated portion for allowing fluid flow; a body including a first half and a second half disposed on either side of a plane (P), the first and second halves having first and second openings, respectively, for permitting fluid flow; a clamping / separating system for clamping and conversely separating at least one clamping component, the at least one clamping component being movable relative to the body according to at least one degree of freedom for translational movement in a translational direction parallel to the direction of fluid flow, the at least one clamping component being disposed between a sealing plate and a first half, the clamping / separating system including an elastically deformable sealing sleeve extending between the first half and the at least one clamping component; The present invention relates to an in-line sealing device including:

[0017] The clamping / separating system includes a first thrust ring fixed to the first half, a second thrust ring fixed to the at least one clamping component, and a plurality of assemblies elastically deformable by compression and equally spaced apart from one another in an azimuth direction about the translation direction, each assembly including a coil spring and a guide shaft including a pivot axis oriented parallel to the translation direction, the coil spring being disposed between the first thrust ring and the second thrust ring, and the coil spring being disposed around the guide shaft.

[0018] According to the present invention, an in-line sealing device is characterized in that the first thrust ring includes a number of first sections equally spaced from one another in an azimuth direction around the translation direction, and the second thrust ring includes a number of second sections equally spaced from one another in an azimuth direction around the translation direction.

[0019] In other words, the clamping / releasing system allows the operator to clamp or release the sealing plate when necessary to move it from a flow position to a sealing position or vice versa.

[0020] This clamping of the sealing plate is then performed between the at least one clamping component and the second half, the first and second halves being fixed to one another and the at least one clamping component being free to translate in a translational direction between the first and second halves.

[0021] The expression "the coil spring is disposed between the first thrust ring and the second thrust ring" means that the coil spring can transmit its thrust directly or indirectly to the first thrust ring and the second thrust ring.

[0022] Thus, the coil spring may directly contact the flat surfaces of the first and second thrust rings, or may contact an intermediate piece that is arranged to contact the first or second thrust ring.

[0023] Furthermore, each deformable assembly is configured to be attached to or removed from the in-line sealing device independently of the other deformable assemblies and without the need to remove the in-line sealing device from the duct.

[0024] Thus, a worn, damaged or broken coil spring in a deformable assembly can be replaced separately from other deformable assemblies on an in-line sealing device mounted in a duct.

[0025] To this end, a compression and / or gripping means can be used to compress and / or remove the deformable assembly. Once compressed, the deformable assembly can be removed radially relative to the direction of fluid flow of the in-line sealing device.

[0026] Furthermore, the various assemblies are symmetrically arranged around a resiliently deformable sealing sleeve extending axially in a translational direction between the first half and said at least one clamping part.

[0027] Similarly, the first section of the first thrust ring and the second section of the second thrust ring are each symmetrically arranged around the entire circumference of an elastically deformable sealing sleeve extending axially in a translational direction between the first half and the at least one clamping component.

[0028] Furthermore, such a segmented arrangement of the first and second thrust rings also helps to ensure uniform thrust generated by the clamping / pull-away system between the sealing plate and the first half, and also helps to ensure optimal sealing.

[0029] The in-line sealing device may further include one or more of the following features, either alone or in combination:

[0030] In practice, the guide shaft may include a head having a rotational degree of freedom relative to the second thrust ring, the rotational degree of freedom being about an axis of rotation coinciding with the pivot axis.

[0031] The guide shaft can therefore rotate about its pivot axis and is guided in rotation relative to the second thrust ring by its head.

[0032] Advantageously, the head may include a first shoulder abutting on the one hand the first end of the coil spring and on the other hand the first face of the second thrust ring.

[0033] The first shoulder of the head of the guide shaft therefore forms an intermediate part that is placed in contact with the coil spring and the second thrust ring.

[0034] According to one embodiment of the present invention, the first shoulder may include a plurality of holes equally spaced radially and azimuthally with respect to the pivot axis, which allow the guide shaft to be rotated relative to the second thrust ring about the axis of rotation using a tool.

[0035] Advantageously, the holes have the same diameter and can be blind, opening only on the outer cylindrical surface of the first shoulder, thus allowing the operator with the tool to rotate the guide shaft about the axis of rotation in order to compress the coil spring of the deformable assembly as required.

[0036] Furthermore, such a tool may have a male cross section at at least one protrusion that matches the female cross section of the holes, and may be in the form of a rod, arm, or cylindrical bar that can be inserted into each of the holes in turn after rotating the guide shaft itself by an angle of several degrees, for example, 0 to 45 degrees.

[0037] In practice, the at least one assembly may include an axial stop secured to a cylindrical portion of the head, the cylindrical portion extending from a first shoulder along the pivot axis and through a matching cylindrical bore in the second thrust ring, the axial stop including a second shoulder contacting a second surface of the second thrust ring, the second surface being arranged parallel to the first surface and perpendicular to the pivot axis.

[0038] Such an axial stop and the second shoulder it includes therefore serve to axially hold the guide shaft relative to the second thrust ring, and furthermore, when the guide shaft is rotated about its axis of rotation, the second shoulder can move toward the first thrust ring and compress the coil spring.

[0039] The cylindrical portion of the head, cooperating with a matching cylindrical bore in the second thrust ring, allows a degree of freedom of movement in rotation corresponding to the rotational freedom of the guide shaft relative to the second thrust ring.

[0040] Furthermore, such an axial stop can be attached and fixed to the free end of the cylindrical portion of the head after being inserted into the cylindrical bore of the second thrust ring. Reversible fixing means, such as a screw or nut, can allow the axial stop to be fixed to the head of the guide shaft to form an integral assembly arranged in a pivoted connection having a degree of freedom of rotation about the axis of rotation relative to the second thrust ring.

[0041] Advantageously, said at least one assembly may comprise a nut having a threaded hole which is screwed onto the threaded portion of the guide shaft, the nut being fixed to the first thrust ring under a tensile reaction transmitted to it by the guide shaft, i.e. having no degrees of freedom.

[0042] Such a nut is disposed in sliding connection with the first thrust ring and has an axial stop that forms a flat bearing connection with the first thrust ring. Thus, one or more flat spots disposed on the outer surface of the nut can help prevent rotation of the nut relative to the first thrust ring about a translation axis coincident with the pivot axis.

[0043] A third shoulder on the nut may form an axial stop and may prevent translational movement along the translational axis and may prevent two relative rotations of the nut and the first thrust ring about two axes that are perpendicular to each other and perpendicular to the translational axis.

[0044] Tightening the guide shaft within the nut reduces the distance separating the guide shaft head from the first thrust ring, and therefore the distance separating the first and second thrust rings.

[0045] Conversely, loosening the guide shaft within the nut increases the distance the guide shaft head is pulled away from the first thrust ring, thereby increasing the distance the first and second thrust rings are pulled apart.

[0046] Advantageously, each assembly of the plurality of assemblies can cooperate with a first section of a first thrust ring and a second section of a second thrust ring, the first section being positioned opposite the second section along a pivot axis of the guide shaft of the assembly.

[0047] In other words, when the assembly is removed from the in-line seal device to replace the coil spring, the first section of the first thrust ring and the second section of the second thrust ring are also removed from the in-line seal device.

[0048] Thus, the assembly and the pair including the first section of the first thrust ring and the second section of the second thrust ring are connected to each other and form a group of parts that can be deformed by compression and expansion along a translational axis.

[0049] Furthermore, notches can be provided between each of the first sections and / or between each of the second sections to make it easier to radially introduce each of the groups of parts juxtaposed around the translational periphery.

[0050] According to another embodiment of the present invention, the sealing sleeve may include a first annular portion that cooperates with the first cylindrical portion of the first thrust ring and a second annular portion that cooperates with the second cylindrical portion of the second thrust ring.

[0051] Thus, the first annular portion can be coaxially disposed with the second annular portion. These first and second annular portions can serve as supports for the first and second cylindrical portions, respectively. Such annular portions can also allow for centering and precise positioning of the cylindrical portions of the first and second thrust rings, respectively.

[0052] Furthermore, such a sealing sleeve may include a deformable portion disposed between the first annular portion and the second annular portion, and such a deformable portion may also include a corrugated portion formed by a metal sheet having rotational symmetry about the translation direction of the in-line seal device.

[0053] The invention and its advantages will become more apparent in the context of the following description of embodiments given by way of example and with reference to the accompanying drawings, in which: FIG. [Brief explanation of the drawings]

[0054] [Figure 1] 1 is a perspective cross-sectional view of an in-line sealing device according to the present invention. [Figure 2] 1 is a partial perspective view of such a sealing device fitted with a clamping / disengaging system according to the present invention; FIG. [Figure 3] 1 is a partial perspective view of such a sealing device fitted with a clamping / disengaging system according to the present invention; FIG. [Figure 4] 1 is a partial cross-sectional view of such a sealing device fitted with a clamping / disengaging system according to the present invention; [Figure 5] 1 is another partial perspective view of such a sealing device fitted with a clamping / disengaging system according to the present invention; FIG. [Figure 6] 1 is another partial perspective view of such a sealing device fitted with a clamping / disengaging system according to the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0055] Additionally, elements that appear in multiple figures may be assigned the same reference number in each of them.

[0056] As previously disclosed, the present invention relates to an in-line seal device that includes a sealing plate that is translationally or rotationally movable between a sealing position that prevents fluid flow through the in-line seal device and a flow position that allows fluid flow.

[0057] 1, such an in-line sealing device 1 includes a sealing plate 2 that is movable at least in a plane P to allow or prevent fluid flow in an interior zone 3 of the in-line sealing device 1. In the flow position of the sealing plate 2, the perforated portion of the sealing plate 2 allows fluid flow in the fluid flow direction C1.

[0058] The sealing plate 2 also includes a solid portion for obstructing the fluid flow, e.g., for carrying out maintenance work on a duct located downstream of the in-line sealing device 1 in the fluid flow direction C1. Such a solid portion 35 is shown in this example positioned in an inner zone 3 of the in-line sealing device 1, while a perforated portion 36 is shown in an outer zone 4 of the in-line sealing device 1.

[0059] 2, the in-line sealing device 1 also includes a main body 5 including a first half 6 and a second half 7 disposed on either side of a plane P. The first half 6 and the second half 7 are disposed so as to be fixed to each other, and therefore there is no degree of freedom between them.

[0060] Thus, the first half 6 has a first opening 8 and the second half 7 has a second opening 9, which allow fluid flow through the inline sealing device 1 when the perforated portion is positioned in the interior zone 3 of the inline sealing device 1.

[0061] The in-line sealing device 1 also includes a clamping / disengaging system 10 for clamping and, conversely, disengaging at least one clamping component 11. This or these clamping components 11 are movable relative to the body 5 in at least one degree of freedom for movement in a translation direction D1 parallel to the direction of fluid flow C1. Thus, one or more clamping components 11 can be moved relative to the body 5 by manual or electrically controlled means, such as, for example, a hydraulic actuator 38.

[0062] Furthermore, the or these clamping parts 11 are positioned between the sealing plate 2 and the first half 6 in this example. However, by reversing the orientation of the in-line sealing device 1 with respect to the direction of fluid flow C1, the relative positions of the first half 6 and the second half 7 can be reversed. Thus, the or these clamping parts 11 can also be positioned between the sealing plate 2 and the second half 7 without departing from the subject matter of the present invention.

[0063] The clamping / separating system 10 also includes a resiliently deformable sealing sleeve 12 extending between the first half 6 and the one or more clamping components 11. The sealing sleeve 12 helps prevent fluid present in the interior zone 3 of the in-line sealing device 1 from leaking out, regardless of the position of the one or more clamping components 11 relative to the body 5.

[0064] Such a clamping / separating system 10 also includes a first thrust ring 13 secured to the first half 6 under a compressive force transmitted to the first thrust ring 13 by coil springs 16, 16', and a second thrust ring 14 secured to one or more clamping components 11 under a compressive force transmitted to the second thrust ring 14 by coil springs 16, 16'.

[0065] The term "fixed" therefore means that, for example, when using the clamping / separating system 10, the first thrust ring 13 can be held in contact with the first half 6 and the second thrust ring 14 can be held in contact with one or more clamping components 11.

[0066] As shown in more detail in Figures 3-6, such a clamping / separating system 10 includes at least one assembly 15, 15' that is elastically deformable by compression, including a coil spring 16, 16' and a guide shaft 17, 17' with pivot axes R1, R2 oriented parallel to a translation direction D1.

[0067] Thus, the coil spring 16, 16' of each assembly 15, 15' is disposed between the first thrust ring 13 and the second thrust ring 14 and extends around the guide shaft 17, 17'.

[0068] As shown, the first thrust ring 13 and the second thrust ring 14 also cooperate with the sealing sleeve 12 .

[0069] Such a sealing sleeve 12 includes a first annular portion 121, a second annular portion 122, and a deformable portion 123 disposed between the first annular portion 121 and the second annular portion 122. Such a deformable portion 123 may also include wavy portions 124, 125 formed by metal sheets having rotational symmetry about the translation direction D1 of the in-line seal device 1.

[0070] The first annular portion 121 cooperates with a first cylindrical portion 130 of the first thrust ring 13 , and the second annular portion 122 cooperates with a second cylindrical portion 140 of the second thrust ring 14 .

[0071] As shown in more detail in FIG. 3, the in-line sealing device 1 may include a plurality of assemblies 15, 15' equally spaced azimuthally about the translation direction D1.

[0072] Such an arrangement of the various assemblies 15, 15' allows any of the assemblies 15, 15' to be removed from the in-line sealing device 1, in particular for replacing the coil springs 16, 16'.

[0073] To do this, the first thrust ring 13 includes several first sections 131, 131' equally spaced azimuthally around the translational direction D1, and the second thrust ring 14 also includes several second sections 141, 141' equally spaced azimuthally around the translational direction D1.

[0074] Thus, when an operator wishes to replace the spring 16, the first section 131 of the first thrust ring 13 and the second section 141 of the second thrust ring 14 are removed from the in-line sealing device 1. One or more grooves may be provided between two consecutive first sections 131, 131′ and / or between two consecutive second sections 141, 141′ to facilitate grasping these sections independently of each other.

[0075] Thus, the assembly 15, the first section 131 of the first thrust ring 13 and the second section 141 of the second thrust ring 14 form a group of parts connected together that are deformable in compression and expansion along a translational axis that coincides with the pivot axis R1.

[0076] Furthermore, to make it easier to radially introduce or grasp each of the groups of parts juxtaposed around the translation direction D1, notches 132, 132', 142, 142' may be provided between each of the first sections 131, 13' and / or between each of the second sections 141, 141'.

[0077] Furthermore, each assembly 15, 15′ cooperates with a first section 131, 131′ of the first thrust ring 13 and a second section 141, 141′ of the second thrust ring 14. Each first section 131, 131′ is disposed opposite the second section 141, 141′, respectively, along the pivot axes R1, R2 of the guide shafts 17, 17′.

[0078] As shown in FIG. 4, each guide shaft 17 may include a head 18 having a rotational degree of freedom relative to the second thrust ring 14, the rotational degree of freedom being about an axis of rotation AXROT1 that coincides with the pivot axis R1.

[0079] The head 18 may include a first shoulder 19 that abuts against the first end 161 of the coil spring 16 on the one hand and against the first surface 145 of said second thrust ring 14 on the other hand.

[0080] 6, such first shoulder 19, 19′ may include a plurality of holes 20, 20′ equally spaced radially and azimuthally with respect to the pivot axes R1, R2. These holes 20, 20′ may enable an operator to rotate the guide shaft 17, 17′ about the axis of rotation AXROT1, AXROT2 relative to the second thrust ring 14 using a tool (not shown), which may be in the form of, for example, a rod or bar, to cooperate with each hole 20, 20′ of a given guide shaft 17, 17′ in turn.

[0081] 5, each assembly 15, 15′ may include an axial stop 21, 21′ secured to a cylindrical portion 22, 22′ of the head 18, 18′. Such cylindrical portion 22, 22′ extends from the first shoulder 19, 19′ along the pivot axis R1, R2.

[0082] This cylindrical portion 22, 22' can therefore pass through a matching cylindrical bore 23, 23' provided in said second thrust ring 14. Furthermore, such an axial stop 21, 21' comprises a second shoulder 24, 24' intended to come into contact with the second face 146 of the second thrust ring 14.

[0083] Such second surface 146 may be disposed parallel to the first surface 145 and perpendicular to the pivot axes R1, R2.

[0084] Furthermore, such an assembly 15, 15' may include a nut 30, 30' having a threaded hole 31, 31' that screws onto the threaded portion 25, 25' of the guide shaft 17, 17'. Such a nut 30, 30' is rigidly fixed to the first thrust ring 13 under a tensile reaction transmitted to the nut 30, 30' by the guide shaft 17, 17'. Furthermore, such tensile reaction counteracts a compressive force transmitted to the first thrust ring 13 and the second thrust ring 14 by the coil spring 16, 16'.

[0085] Thus, the nuts 30, 30' may be provided with a third shoulder 32 for contacting the first surface 135 of the first thrust ring 13, and the nuts 30, 30' may be provided with one or more flat spots 33, 33' for cooperating with the matching bores 137.

[0086] The first thrust ring 13 may also include a second surface 136 against which the second ends 162 of the springs 16, 16' may abut to transmit a compressive force.

[0087] Such second surface 136 can be arranged parallel to the first surface 135 and perpendicular to the pivot axes R1, R2.

[0088] It will be appreciated that the present invention is susceptible to many variations in its implementation. While several embodiments have been described above, it should be readily understood that it is not intended to exhaustively identify all possible embodiments. It will be appreciated that any of the described means may be replaced by equivalent means without departing from the scope of the present invention.

Claims

1. An in-line sealing device (1), a sealing plate (2) movable in a plane (P) between a sealing position for preventing a fluid flow in the interior zone (3) of the in-line sealing device (1) and a flow position for allowing the fluid flow in a direction of the fluid flow (C1), the sealing plate (2) including a solid portion for preventing the fluid flow and a perforated portion for allowing the fluid flow; a body (5) comprising a first half (6) and a second half (7) respectively arranged on either side of said plane (P), said first and second halves (6, 7) having a first opening (8) and a second opening (9) respectively allowing the flow of said fluid; a clamping / separating system (10) for clamping and, conversely, for separating at least one clamping component (11), said at least one clamping component (11) being movable relative to said body (5) according to at least one degree of freedom for translational movement in a translational direction (D1) parallel to said fluid flow direction (C1), said at least one clamping component (11) being arranged between said sealing plate (2) and said first half (6), said clamping / separating system (10) comprising an elastically deformable sealing sleeve (12) extending between said first half (6) and said at least one clamping component (11), said clamping / separating system (10) being secured to said first half (6); a clamping / separating system (10) including a first thrust ring (13), a second thrust ring (14) fixed to the at least one clamping component (11), and a plurality of assemblies (15, 15') elastically deformable by compression and equally spaced apart from one another in an azimuth direction around the translation direction (D1), each assembly (15, 15') including a coil spring (16, 16') and a guide shaft (17, 17') having a pivot axis (R1, R2) oriented parallel to the translation direction (D1), the coil spring (16, 16') being disposed between the first thrust ring (13) and the second thrust ring (14), and the coil spring (16, 16') being disposed around the guide shaft (17, 17'); In an in-line sealing device (1), the first thrust ring (13) includes several first sections (131, 131') equally spaced from one another in an azimuth direction around the translational direction (D1), and the second thrust ring (14) includes several second sections (141, 141') equally spaced from one another in an azimuth direction around the translational direction (D1). In-line sealing device (1).

2. the guide shaft (17, 17') comprises a head (18, 18') having a rotational degree of freedom relative to the second thrust ring (14), the rotational degree of freedom being around a rotation axis (AXROT1, AXROT2) coinciding with the pivot axis (R1, R2), The in-line sealing device according to claim 1 .

3. the head (18, 18') comprises a first shoulder (19, 19') which abuts on the one hand against the first end (161, 161') of the coil spring (16, 16') and on the other hand against the first surface (145) of the second thrust ring (14), The in-line sealing device according to claim 2 .

4. the first shoulder (19, 19') comprises a plurality of holes (20, 20') equally spaced radially and azimuthally with respect to the pivot axis (R1, R2), the plurality of holes (20, 20') allowing the guide shaft (17, 17') to be rotated relative to the second thrust ring (14) about the rotation axis (AXROT1, AXROT2) using a tool. The in-line sealing device according to claim 3 .

5. the at least one assembly (15, 15') includes an axial stop (21, 21') fixed to a cylindrical portion (22, 22') of the head (18, 18'), the cylindrical portion (22, 22') extending from the first shoulder (19, 19') along the pivot axis (R1, R2), the cylindrical portion (22, 22') passing through a matching cylindrical bore (23, 23') provided in the second thrust ring (14), the axial stop (21, 21') including a second shoulder (24, 24') contacting a second surface (146) of the second thrust ring (14), the second surface (146) being disposed parallel to the first surface (145) and perpendicular to the pivot axis (R1, R2). The in-line sealing device according to claim 3 or 4.

6. the at least one assembly (15, 15') comprises a nut (30, 30') having a threaded hole (31, 31') screwed onto the threaded portion (25, 25') of the guide shaft (17, 17'), the nut (30, 30') being fixed to the first thrust ring (13) without a degree of freedom under a tensile reaction transmitted to the nut (30, 30') by the guide shaft (17, 17'), The in-line sealing device according to any one of claims 1 to 5.

7. each assembly (15, 15') of the plurality of assemblies (15, 15') cooperates with a first section (131, 131') of the first thrust ring (13) and a second section (141, 141') of the second thrust ring (14), the first section (131, 131') being arranged on the opposite side of the second section (141, 141') along the pivot axis (R1, R2) of the guide shaft (17, 17') of the assembly (15, 15'); The in-line sealing device according to any one of claims 1 to 6.

8. the sealing sleeve (12) comprises a first annular portion (121) cooperating with a first cylindrical portion (130) of the first thrust ring (13) and a second annular portion (122) cooperating with a second cylindrical portion (140) of the second thrust ring (14). The in-line sealing device according to any one of claims 1 to 7.

Images