Circuit breaker and pressurized fluid handling installation including such a circuit breaker

Abstract

Circuit breaker and pressurized fluid handling system comprising such a circuit breaker. In the coupled configuration of the male (100) and female (200) elements of the circuit breaker (10), the first and second radial passages (126, 226) are in fluidic communication, and proximal (132) and distal (134) seals are arranged on either side of the radial passages. A first valve (110) comprises a distal stem (110C) sliding within a male body (102). In an intermediate coupling position, the proximal and distal seals are arranged on either side of the radial passages. The proximal and distal seals are received respectively in a proximal external peripheral groove (136) and in a distal external peripheral groove (138) of the male body (102).A first longitudinal distance (d138), measured between the distal external peripheral groove and a median radial plane (P126) of the first radial passage, is strictly greater than a second longitudinal distance (d136), measured between the proximal external peripheral groove and the median radial plane. Figure for the abstract: 1.

Description

Title of the invention: Circuit breaker and pressurized fluid handling installation comprising such a circuit breaker

[0001] The invention relates to a so-called "safety" circuit breaker, for a pressurized fluid handling installation such as, for example, an installation for filling a motor vehicle tank with pressurized hydrogen.

[0002] To prevent the filling time of a motor vehicle's hydrogen tank under pressure from being too long, it is known to use a high filling pressure, exceeding 300 bar and potentially reaching up to 900 bar. Given this pressure level, the connection between the hydrogen source and the motor vehicle's tank must be leak-proof.

[0003] Furthermore, the possibility of the vehicle's tank shifting unexpectedly during refueling cannot be ruled out. Such movement could result from improper vehicle immobilization or user error. This shift must not cause damage to or exposure of the pipeline connecting the pressurized hydrogen source to the vehicle's tank.

[0004] To address this problem, EP3457016B1 discloses a circuit breaker with a locking mechanism where a male element is held within a female element by means of balls elastically returned to the locked position. In this device, which is generally satisfactory, a solid internal valve in the male element is operated by a separate actuating rod. The female element also includes a valve. When the male and female elements of the circuit breaker are uncoupled, upon closing the valves, a volume of fluid, known as dead volume, is trapped downstream of the valves. When the fluid is under pressure, particularly above 300 bar, this dead volume tends to deform the seals installed between the bodies of the male and female elements, in the portions located outside their respective receiving grooves, damaging them or even ejecting them from these grooves.For this reason, EP3457016B1 proposes that distal and proximal seals be chosen with a torus diameter large relative to their internal diameter. This results in a relatively large radial and longitudinal footprint for the circuit breaker, which is incompatible with certain high-pressure filling applications where optimal compactness is required. Indeed, given the pressures involved, a relatively large diameter of the male and female elements of a circuit breaker induces high pressure forces due to the fluid present within the circuit breaker.

[0005] Similar problems arise in other pressurized fluid handling installations, in particular an installation for filling a motor vehicle tank with pressurized natural gas.

[0006] There is therefore a need for a circuit breaker with improved radial and / or axial compactness.

[0007] To this end, the invention relates to a circuit breaker for connecting two sections of piping in a pressurized fluid handling installation, this circuit breaker comprising a male element and a female element intended to fit into each other along a fitting axis,

[0008] the male element comprising

[0009] - a male body centered on the handle axis and comprising: • a first internal conduit for circulating fluid under pressure; • at least one first radial passage connecting the first internal duct to an external peripheral surface of the male body; and • an external locking notch,

[0010] - a first valve, movable in the first internal conduit, along the axis of the fitting, between an advanced closing position of the first internal conduit and a rearward opening position of the first internal conduit, and comprising a sealing portion, which is in longitudinal forward abutment against the male body in the closed position of the first valve,

[0011] - a spring pushing the first valve towards the advanced closing position,

[0012] the female element comprising:

[0013] - a female body comprising a second internal fluid circulation conduit under pressure and at least a second radial passage connecting the second internal conduit to an internal receiving volume of the male body in the female body;

[0014] - a second movable valve in the second internal conduit

[0015] - at least one locking member received in a locking housing and configured to move from a first locking position, where the locking member is engaged in the external locking notch, to oppose axial withdrawal of the male body out of the female body in the mated configuration of the male and female elements, to a second release position, where axial withdrawal of the male body out of the female body is possible.

[0016] In the coupled configuration of the male and female elements, • the first and second radial passages are in fluidic communication; • the locking device(s) is in the first locking position; • the first valve is in the retracted open position; • a proximal sealing gasket and a distal sealing gasket are arranged, along the insertion axis, on either side of the first and second radial passages and cooperate radially respectively with an internal radial surface of the female body delimiting the internal volume and with the external peripheral surface of the male body so as to fluidly isolate the first and second radial passages from the outside of the circuit breaker.

[0017] In accordance with the invention - the first valve also includes a distal stem which is mounted to slide, between the advanced closed position and the retracted open position, in a housing of the male body passing through a distal end of the male body, - a first radial stem seal cooperates radially with the distal stem and with the distal end of the male body; - the female element includes a bearing surface configured to come into contact with the first valve and move it, when the male and female elements are fitted together, from the advanced closed position to the rearward open position; - in an intermediate position of coupling of the male and female elements, • the first valve is in the advanced closed position and in contact with the bearing surface of the female element; • each locking element is not in the first locking position; • the proximal sealing gasket and the distal sealing gasket are arranged, along the insertion axis, on either side of the first and second radial passages and fluidly isolate the first and second radial passages from the outside of the circuit breaker; - the proximal sealing gasket and the distal sealing gasket are respectively received in a proximal external peripheral groove and in a distal external peripheral groove of the external peripheral surface of the male body; - a first longitudinal distance, measured parallel to the axis of the joint between the distal external peripheral groove and a median radial plane of the first radial passage, is strictly greater than a second longitudinal distance, measured parallel to the axis of the joint between the proximal external peripheral groove and the median radial plane.

[0018] Thanks to the invention, the fact that the first valve also includes the distal stem—in other words, that the distal stem is a single piece with the rest of the first valve—enhances the reliability of the valve's operation. Furthermore, the positioning of the proximal and distal seals in external grooves of the male body limits their ejection from the external grooves under the pressure of the fluid during the uncoupling of the male and female elements of the circuit breaker. The fact that the first longitudinal distance is greater than the second longitudinal distance ensures optimized positioning of the proximal and distal seals with respect to the second or each radial passage during the coupling of the male and female elements of the circuit breaker.In summary, the circuit breaker of the invention exhibits increased radial and axial compactness, for a cross-section and flow rate comparable to those of prior art devices. Furthermore, the number of seals used between the male and female elements of the circuit breaker remains minimal, with one proximal seal and one distal seal. Their friction length, during the mating or unmating of the male and female elements of the circuit breaker, is advantageously limited.

[0019] According to advantageous but not mandatory aspects of the invention, such a circuit breaker may incorporate one or more of the following features, taken in any technically permissible combination:

[0020] - A ratio between the first longitudinal distance and the second distance longitudinal is greater than or equal to 1.5, preferably 1.75.

[0021] - The female body comprises at least one first vent, which passes radially the female body and which fluidly connects the internal volume in front of the second radial passage and the outside of the circuit breaker, and at least one second vent which radially passes through the female body and which fluidly connects the internal volume of the female body, behind the second radial passage, and the outside of the circuit breaker, whereas, in the mated configuration of the male and female elements and in the intermediate mating position, the first and second radial passages are isolated from the first and second vents respectively by the proximal and distal sealing gaskets.

[0022] - During the uncoupling of the male and female elements from the configuration when coupled, the distal sealing joint is radially aligned with the second radial passage when the proximal sealing joint reaches radially aligned with the first vent.

[0023] - The first vent and the second passage each open onto a radial surface internal to the female body at the level of hollow pockets, locally around the shaft axis, from this internal radial surface.

[0024] - The first vent comprises a cylindrical portion inclined with respect to the axis of insertion and of which a rear end opens onto an external radial surface of the female body and is disposed behind a front end of the cylindrical portion.

[0025] - The circuit breaker comprises several locking elements, each element The locking element is a movable ball in a locking housing which passes radially through the female body, the female element comprising a locking ring which is mounted to slide around the female body and which surrounds the locking members, the locking ring being elastically returned to the rear, the locking ring being in contact on the rear, in the coupled configuration of the male and female elements, with the balls by an internal cover surface inclined with respect to the axis of insertion and diverging towards the rear of the female body.

[0026] - The locking member is a locking spring housed in a housing of The locking mechanism is formed by an internal peripheral groove in the female body, and the locking spring is configured to deform elastically between its first locking position and its second release position.

[0027] - Each second radial passage is delimited longitudinally by a first part and by a second part of the female body, distinct from the first part, the second part and the first part being joined longitudinally against each other, and, in the mated configuration and in the intermediate mating configuration, the proximal sealing joint cooperates radially with an internal radial surface belonging to the first part and the distal sealing joint cooperates radially with an internal radial surface belonging to the second part.

[0028] - Each first radial pass and each second radial pass has a cross-section elongated, with a maximum dimension parallel to the axis of attachment.

[0029] - The first valve comprises a proximal stem sliding in a housing of the male body between the advanced closing position and the rearward opening position with radial interposition of a second stem seal, the first stem seal is mounted in an internal peripheral groove of the male body, while the second stem seal is housed in an external peripheral groove of the proximal stem and a ratio between, on the one hand, a diameter of the proximal stem and, on the other hand, a diameter of the distal stem is between 0.95 and 1.

[0030] - The housing for the male body where the proximal rod is received is formed in a part intermediate of the male body mounted in longitudinal seal contact with a proximal part of the male body, configured to be connected to a section of pressurized fluid pipeline, and in longitudinal seal contact with a distal part of the male body which carries the proximal and distal seals.

[0031] - In the coupled configuration of the male and female elements, a diameter of one The internal radial surface of the female body with which the proximal seal radially cooperates is equal to a diameter of an internal radial surface of the female body with which the distal seal radially cooperates, and a diameter of an external peripheral surface of the male body with which the proximal seal radially cooperates is equal to a diameter of an external peripheral surface of the male body with which the distal seal radially cooperates.

[0032] - The second valve includes a distal stem which is mounted to slide In a sealed manner within a through-hole of the female body, the male body forms a bearing surface configured to contact the second valve and move it, upon assembly of the male and female elements, from a forward closed position to a rearward open position. The bearing surface configured to contact the first valve is formed on the female body. A contact area between the bearing surface of the male body and the second valve, and a contact area between the bearing surface of the female body and the first valve, are radially offset from each other.

[0033] According to a second aspect, the invention relates to a pressurized fluid handling installation comprising a pressurized fluid source and a first part of a fitting intended to be coupled to a second part of a fitting connected to a fluid storage or use volume, the first part of the fitting being fluidly connected to the source by a pipeline, characterized in that a circuit breaker as mentioned above is fluidly connected to the source by a first section of the pipeline and to the first part of the fitting by a second section of the pipeline.

[0034] This installation is easier to handle than those of the prior art, due to the compactness of the circuit breaker, and its reliability is improved.

[0035] The invention will be better understood and other advantages thereof will become more apparent from the following description of four embodiments of a circuit breaker and an installation conforming to its principle, given by way of example and with reference to the accompanying drawings in which:

[0036] [Fig.1] Fig.1 is a schematic representation of the principle of a pressurized fluid handling installation which includes, among other things, a circuit breaker according to a first embodiment of the invention whose male and female elements are shown in uncoupled configuration, in longitudinal section;

[0037] [Fig.2] [Fig.2] represents, on an insert A) a larger scale view of detail II in [Fig.1] and on an insert B) a partial section in principle along line BB on insert A);

[0038] [Fig.3] The [Fig.3] is an exploded perspective view of the circuit breaker of figures 1 and 2;

[0039] [Fig.4] Fig.4 represents, on an insert A), a partial longitudinal section of the male and female elements of the circuit breaker of figures 1 to 3 in a first intermediate coupling position, on an insert B) a section along line BB on insert A, on an insert C) a section along line CC on insert A and, on an insert D) a larger scale view of detail D on insert C;

[0040] [Fig.5] The [Fig.5] represents the male and female elements of the circuit breaker, in longitudinal section, in a second intermediate coupling position on the insert A) and in a third intermediate coupling position on the insert B);

[0041] [Fig.6] Fig.6 represents the male and female elements of the circuit breaker, in longitudinal section and in coupled configuration, for insert A) in the same plane of section as figures 1 and 5 and, for insert B), in a perpendicular plane represented by the line BB on insert A);

[0042] [Fig.7] The [Fig.7] is a longitudinal section of principle of a circuit breaker according to a second embodiment, in a first intermediate position of coupling of its male and female elements;

[0043] [Fig.8] Fig.8 represents, on insert A), a longitudinal section of the circuit breaker of [Fig.7] in a second intermediate coupling position and, on insert B), a cross-section along line BB on insert A);

[0044] [Fig.9] Fig.9 represents, on insert A), a longitudinal section of the circuit breaker of figures 7 and 8 in coupled configuration and, on inserts B) and C), transverse sections respectively along lines BB and CC on insert A);

[0045] [Fig. 10] The [Fig. 10] represents, on two inserts A) and B) and in longitudinal section, a circuit breaker according to a third embodiment of the invention, respectively in intermediate coupling position and in coupled configuration;

[0046] [Fig. 11] The [Fig. 11] represents, respectively on inserts A), B) and C) a circuit breaker according to a fourth embodiment of the invention respectively, in longitudinal section in an intermediate coupling position, in coupled configuration and in partial exploded perspective.

[0047] A pressurized fluid handling installation 2 is shown in [Fig. 1]. It includes a terminal 4 which forms a source of pressurized fluid, this fluid being, in the example, liquid hydrogen at a pressure between 300 and 900 bar. The installation 2 also includes a nozzle 62 which constitutes a first part of a fitting 6, the second complementary part 64 of which is mounted on a motor vehicle 8 which includes an on-board storage tank 82 for the pressurized fluid. The second part 64 can be coupled to the gun 62 when it is necessary to fill the tank 82 with pressurized fluid.

[0048] A conduit 9 connects terminal 4 to gun 62. A safety circuit breaker 10 according to the invention is interposed along the conduit 9 and divides it into a first upstream section 92, which extends between terminal 4 and the circuit breaker 10, and a second downstream section 94, which extends between this circuit breaker 10 and gun 62.

[0049] For clarity of the drawing, elements 4, 6 and 9 of installation 2 are shown only in [Fig.1].

[0050] The circuit breaker 10 comprises a male element 100 and a female element 200.

[0051] For each of the male element 100 and female element 200, the front of this element is defined as being the side of this element oriented towards the other element of the circuit breaker 10 when these male and female elements are aligned and ready to be inserted into each other. The rear of one of the elements of the circuit breaker is defined as the side opposite its front side, oriented towards the section 92 or 94 of the conduit 9 to which it is connected.

[0052] For each of the male and female elements 100 and 200, the adjective "proximal" describes a part, surface, or volume located closer to the rear of that element than a part, surface, or volume described as distal. Conversely, the adjective "distal" describes a part, surface, or volume located closer to the front of one of the male and female elements 100 and 200 than a part, surface, or volume described as proximal.

[0053] In figures 1, 4 and 5, the front or distal side of element 100 is oriented to the right, while its rear or proximal side is oriented to the left, that the front or distal side of female element 200 is oriented to the left of these figures and that its rear or proximal side is oriented to the right.

[0054] In what follows, the adjectives "axial" and "radial" are used to describe the position or orientation of a surface with respect to a longitudinal axis of the part or subassembly concerned. A surface is axial when it is perpendicular to a longitudinal axis and radial when it is perpendicular to any normal to a longitudinal axis. In particular, a radial surface is a circular peripheral surface that is centered on a longitudinal axis and extends around that axis.

[0055] The adjectives "internal" and "external" are used to describe the orientation of a surface with respect to a central longitudinal axis of the part or subassembly concerned. A surface is internal when it is oriented towards the central longitudinal axis and external when it is oriented in the opposite direction to the central longitudinal axis.

[0056] The circuit breaker 10 is intended for the removable connection of sections 92 and 94 to which the male element 100 and the female element 200 are connected.

[0057] The male element 100 extends along a longitudinal axis X100 and comprises a tubular male body 102 centered on the longitudinal axis X100 and composed of a proximal part 102A, an intermediate part 102B and a distal part 102C.

[0058] The male body 102 is traversed by a first internal conduit 104 for circulating pressurized fluid, which is connected to the upstream section 92 in the configuration for use of the circuit breaker 10. The male body 102 includes the first internal conduit 104.

[0059] The proximal and distal parts 102A and 102C are screwed together by means of a thread formed on an external radial surface of the proximal part 102A and a tapped hole formed on an internal radial surface of the distal part 102C. The proximal and distal parts 102A and 102C sandwich the intermediate part 102B in a direction parallel to the longitudinal axis X100.

[0060] The distal part 102C is in direct contact, on its rear side, against the intermediate part 102B. A front sealing gasket 106, interposed between an axial rear surface of the distal part 102C and an axial front surface of the intermediate part 102B, ensures the sealing of the internal conduit 104 at the interface between the distal part 102C and the intermediate part 102B.

[0061] The proximal part 102A is in direct contact, by its front side, against the intermediate part 102B. A front seal 108, interposed between an axial front surface of the proximal part 102A and an axial rear surface of the intermediate part 102B, ensures the sealing of the internal conduit 104 at the interface between the proximal part 102A and the intermediate part 102B.

[0062] The front joints 106 and 108 are not subjected to a force which would tend to drive them out of their respective housings under the effect of the pressure prevailing in the male body 102.

[0063] Three through-conduits pass through the intermediate part 102B from one side to the other along the longitudinal axis X100 and form part of the internal conduit 104. Only one of the through-conduits is visible in [Fig.1], with the reference 102H. The three conduits in question are visible in [Fig.3].

[0064] A valve 110 of the male element 100 is movable, in the internal conduit 104, between an advanced closing position of this conduit, which is represented in particular in [Fig.1] and where it is in front abutment against a seat 112 formed on the distal part 102C of the male body, and a receding opening position, represented in particular in [Fig.6], where it is offset from its seat 112 and opens the internal conduit 104 of the male element 100.

[0065] A sealing gasket 114 is mounted on the valve 110 and cooperates radially with The distal part 102C of the male body 102 in the advanced closing position of this valve, to ensure the sealing of the internal conduit 104. This seal 114 is not in contact with the male body 102 in the recoiled opening position of valve 110.

[0066] The valve 110 is a single unit and comprises a valve head 110A, which carries the seal 114 and bears against the seat 112, i.e., in longitudinal forward or forward position, in the advanced closed position of the valve. The valve head 110A constitutes a portion for selectively sealing the internal conduit 104. The valve 110 also comprises a proximal stem 110B and a distal stem 110C, formed as a single piece with the valve head 110A.

[0067] The distal end of the male body 102 is denoted 102D, and is formed by the distal end of the distal portion 102C. The distal stem 110C passes through the distal end 102D by being received in a through-hole 116 which extends through the distal end 102D, along the longitudinal axis X100. A first stem seal 118 is mounted in an internal peripheral groove of the distal end 102D which opens into the through-hole 116. This first stem seal 118 cooperates radially with the distal end 102D and with the distal stem 110C and slides along an external radial surface of the distal stem HOC when the latter moves axially relative to the male body 102.

[0068] The proximal rod 110B is engaged in a housing 120 centered on the longitudinal axis X100 and formed in the intermediate portion 102B. A second rod seal 122 is mounted in an external peripheral groove of the proximal rod 110B and cooperates radially with this proximal rod 110B and an internal radial surface radially delimiting the housing 120. The second rod seal 122 slides along the internal radial surface radially delimiting the housing 120 when the proximal rod moves axially relative to the male body 102.

[0069] A spring 124 is interposed between the intermediate part 102B and the head 110A, around the proximal stem 110B, inside the internal conduit 104. The spring 124 exerts by default an elastic pushing force on the valve 110 towards its advanced closing position.

[0070] Let C1 be a diameter of the external radial surface of the proximal stem 110B from which the external peripheral groove housing the second stem seal 122 is formed. Let C2 be a diameter of the external radial surface of the distal stem HOC that defines a sealing diameter between the first stem seal 118 and the peripheral surface of the distal stem 110C. Let Ol' be a diameter of the bottom of the external peripheral groove of the second seal 122 that defines a sealing diameter between the second stem seal 122 and the proximal stem 110B. Diameters C1 and C2 are substantially equal. In practice, the ratio <e> 1 / <e>2 is between 0.95 and 1, while preferably strictly less than 1. Thus, with a first stem seal 118 mounted in a bore and a second stem seal 100 mounted on a stem, the sealing diameter <e>The diameter of the stem seal 122 with the valve 110 is strictly smaller than the sealing diameter ¢2, which means that the pressure of the fluid contained in the internal conduit 104 does not exert an opening force on this valve in the coupled configuration. Indeed, when the diameter ¢15 is strictly smaller than the diameter ¢2, the pressure of the fluid contained in the internal conduit tends to return the valve 110 to its advanced closed position. This difference between the diameters ¢1' and ¢2 contributes to the secure closure of the valve 110, and therefore to emergency unlocking, since the spring 124 does not need to be oversized to guarantee the closure of the valve 110.

[0071] In the uncoupled configuration shown in [Fig.1], the distal rod 110C protrudes forward from the male element 100 relative to a front axial end surface 102E of the distal end 102D, and therefore of the male body 102.

[0072] The distal portion 102C of the male body 102 forms several first radial passages 126, in the example six first radial passages, which are regularly distributed around the longitudinal axis X100 and which preferably have an elongated cross-section parallel to this axis, this elongated cross-section being visible in [Fig. 3]. The male body 102 comprises the first radial passages 126. Advantageously, a length of each first radial passage 126, which constitutes the maximum dimension of this radial passage and which is measured parallel to the longitudinal axis X100, is strictly greater than a width of this first radial passage which is measured in an ortho-radial direction to the longitudinal axis X100. Each radial passage 126 is a cylindrical volume whose base has an elongated cross-section and whose cylindrical axis is radial to the longitudinal axis X100.

[0073] The number of radial passages 126 may be different from six. In practice, this number is chosen to be greater than or equal to one, preferably between one and ten, depending on the respective dimensions of the distal part 102C and the radial passages 126.

[0074] Each radial passage 126 connects the internal conduit 104 and an external peripheral surface 102F of the distal part 102C, in a front portion 102F1 of this surface 102F which has a circular cross-section and a straight generatrix.

[0075] The distal part 102C also forms an external locking notch 128, in other words an external peripheral locking groove, which is provided on the external peripheral surface 102F, being axially offset backwards relative to the first radial passages 126. The male body 102 includes the external locking notch 128.

[0076] The front portion 102F1 of the external peripheral surface 102F carries two O-ring seals, arranged on either side of the first radial passages 126, along the longitudinal axis X100, namely a proximal sealing joint 132 and a distal sealing joint 134. Each of the proximal sealing joints 132 and distal sealing joints 134 is respectively received in an external peripheral groove of the external peripheral surface 102F, namely respectively a proximal external peripheral groove 136 and a distal external peripheral groove 138.

[0077] Advantageously, the proximal external peripheral groove 136 and the distal external peripheral groove 138 are identical.

[0078] P126 is noted as a median radial plane of the first radial passages 126.

[0079] We denote dl36 a distance measured between the median radial plane P126 and the edge of The groove 136 closest to the first radial passages 126. We note dl38 an axial distance measured between the median radial plane P126 and the edge of the groove 138 closest to the first radial passages 126. The axial distances dl36 and dl38 are measured parallel to the longitudinal axis X100.

[0080] The distance dl38 is strictly greater than the distance dl36.

[0081] In other words, the proximal sealing joint 132 is closer to the first radial passages 126 than the distal sealing joint 134.

[0082] Advantageously, the distance dl38 is at least one and a half times greater than the distance dl36, preferably 1.75 times greater. In other words, a ratio dl38 / dl36 is greater than or equal to 1.5, preferably 1.75.

[0083] We have the following relationships:

[0084] dl38 / dl36 > 1.5 (equation 1)

[0085] preferably dl38 / dl36 > 1.75 (equation Ibis)

[0086] Advantageously, the proximal 132 and distal 134 sealing joints are identical.

[0087] The inner diameter of the sealing joint 132 is denoted respectively by 0132 and 0134 is the inner diameter of the sealing gasket 134. We respectively denote q>132 the torus diameter of the sealing gasket 132 and q> 134 the torus diameter of the sealing gasket 134.

[0088] Advantageously, for each joint, its torus diameter is much smaller than its inner diameter, preferably at least 5 times smaller than the inner diameter, preferably still at least 10 times smaller than the inner diameter.

[0089] We have the following relationships:

[0090] 0132 > 5 X cp 132 (equation 2)

[0091] preferably 0132 > 10 X q> 132 (equation 2bis)

[0092] 0134 > 5 X q>134, (equation 3)

[0093] preferably 0134 > 10 X cp 134 (equation 3bis)

[0094] The external locking notch 128 is delimited longitudinally by a distal inclined surface S128 located on the front side of this notch and a proximal inclined surface S'128 located on the rear side of the locking notch.

[0095] The distal inclined surface S128 extends, in the direction of the distal end 102D of the male body 102, by a radial surface S101 parallel to the longitudinal axis X100 and then an external surface S102, inclined with respect to the longitudinal axis X100, the external inclined surface S102 being the closest to the distal end 102D among these two surfaces S102 and S128.

[0096] In practice, the surfaces S128, S'128 and S102 are advantageously in the shape of a truncated cone, while the surface S101 is advantageously in the shape of a cylinder with a straight generatrix and a circular base.

[0097] The distal inclined surface S128 diverges forward, i.e. approaching the distal end 102D along the longitudinal axis X100, while the proximal inclined surfaces S'128 and external S102 converge forward, approaching the distal end 102D along the longitudinal axis X100.

[0098] We denote a an angle of inclination of the proximal inclined surface S128 with respect to the longitudinal axis X100. Advantageously, the angle a is between 40 and 50°, preferably equal to about 45°.

[0099] B denotes an angle of inclination of the external inclined surface S102 with respect to the longitudinal axis X100. Advantageously, the angle B is between 12 and 20°, preferably equal to about 15°.

[0100] The male body 102 also includes external radial teeth 140 extending from the external peripheral surface 102F, near a rear extremity of the distal part 102C. Each tooth 140 is delimited, in an ortho-radial direction to the longitudinal axis X100, by two faces 142 parallel to a longitudinal plane passing through the middle of the tooth 140 in question, equidistant from these faces, and containing the longitudinal axis X100. The external radial teeth 140 are regularly distributed around the longitudinal axis X100, at the rear extremity of the distal part 102C, and are arranged angularly in a precise and predetermined manner with respect to the first radial passages 126.

[0101] In the example in the figures, the number of teeth 140 is equal to six. Alternatively, it may be different, while remaining greater than or equal to 1.

[0102] The housing 120 of the intermediate portion 102B of the male body 102 is connected to the outside of the male element 100 at the rear of the proximal stem 110B, in all positions of the valve 110 relative to the male body 100, particularly when this valve is in the forward closed position and in the rearward open position. To achieve this, a vent 144 is provided in the intermediate portion 102B and extends radially to the longitudinal axis XI00, between the housing 120 and an external peripheral surface 102G of the intermediate portion 102B. This vent 144 communicates, through a radial hole 146 provided through the proximal portion 102A and then through a radial space 147 provided between the proximal and distal portions 102A and 102C, which is not airtight. Air from housing 120 can thus escape out of the male element 100 through vent 144, radial hole 146, and radial gap. Vent 144 is isolated from the internal conduit 104 by front seals 106 and 108 and by the second stem seal 122, so that the fluid flowing through the circuit breaker in the mated configuration of male elements 100 and female elements 200 is not at risk of escaping from the circuit breaker through vent 144.

[0103] The female element 200 extends along a longitudinal axis X200 and comprises a tubular female body 202 centered on the longitudinal axis X200 and composed of a proximal part 202A, an intermediate part 202B and a distal part 202C.

[0104] The female body 202 is traversed by a second internal conduit 204 for circulating pressurized fluid which is connected to the downstream section 94 in the configuration of use of the circuit breaker 10. The female body 202 includes the second internal conduit 204.

[0105] During the coupling of the male and female elements 100 and 200 and in the fitted configuration of these elements, the longitudinal axes X100 and X200 are coincident and aligned on a fitting axis X10 of the circuit breaker 10.

[0106] The intermediate part 202B and the distal part 202C together delimit an internal volume V200 of the female element 200 configured to receive a part of the male element 100 during mating and in mated configuration of the male and female elements 100 and 200.

[0107] The intermediate part 202B forms a support surface 202D which longitudinally delimits, on the rear, the internal volume V200. The support surface 202D is an internal surface, axial with respect to the longitudinal axis X200.

[0108] The proximal and distal parts 202A and 202C are screwed together by means of a thread formed on an external radial surface of the distal part 202C and a tapped hole formed on an internal radial surface of the proximal part 202A. The proximal and distal parts 202A and 202C sandwich the intermediate part 202B in a direction parallel to the longitudinal axis X200.

[0109] A radial sealing gasket 206 is arranged radially between the intermediate part 202B and the distal part 202C. The gasket 206 is housed in an external peripheral groove 207 formed on an external radial surface 202E of the intermediate part 202B.

[0110] A front sealing gasket 208 is interposed between the intermediate part 202B and the proximal part 202A, at the level of a contact zone where an axial surface bearing takes place between the parts 202A and 202B.

[0111] The external radial surface 202E cooperates with reduced clearance with an internal radial surface 202F of the distal part 202C, over more than one-third of the length of the intermediate part 202B measured parallel to the longitudinal axis X200. This The reduced-play cooperation of surfaces 202E and 202F ensures good coaxiality of the intermediate and distal parts 202B and 202C of the female body 202.

[0112] The internal conduit 204 includes a rear portion 204A centered on the longitudinal axis X200 and in which is housed a monobloc valve 210 of the female element 200.

[0113] The valve 210 is movable, in the rear part 204A of the internal conduit 204, between an advanced closing position of this conduit, which is shown in particular in [Fig.1] and where a head 210A of this valve is in front abutment against a seat 212 formed on the intermediate part 202B of the female body, and a rearward opening position, shown in particular in [Fig.6], where it is offset from its seat 212 and opens the internal conduit 204 of the female element 200. The valve head 210A constitutes a portion of selective closure of the internal conduit 204.

[0114] A sealing gasket 214 is mounted on the valve 210 and cooperates radially with the intermediate portion 202B of the female body in the forward closed position of this valve. This gasket is not in contact with the female body 202 in the rearward open position of the valve 210.

[0115] A spring 224 interposed between the proximal part 202A and the valve 210 pushes the valve 210 by default towards its advanced closing position, in contact with the seat 212.

[0116] The internal conduit 204 also includes an intermediate part 204B arranged radially inside the distal part 202C, around the intermediate part 202B.

[0117] Inclined passages 216 cross the intermediate part 202B and extend from the intermediate part 204B of the internal conduit 204, towards the rear part 204A of this internal conduit, in front of the seat 212. In practice, the inclined passages 216 are part of the internal conduit 204 and connect its intermediate 204B and rear 204A parts.

[0118] The inclined passages 216 are, for example, six in number and all have the same inclination with respect to the longitudinal axis X200. The inclined passages 216 diverge towards the front of the female element 200. Y denotes the angle of inclination of an inclined passage 216 with respect to the longitudinal axis X200. The value of the angle Y is advantageously between 40° and 50°, preferably on the order of 45°.

[0119] In a non-represented variant of the invention, the number of inclined passages 216 is different from six, being greater than or equal to one.

[0120] Second radial passages 226 connect the intermediate portion 204B of the internal conduit 204 and a first internal radial surface 202G of the intermediate portion 202B, which contributes to the radial delimitation of the volume V200. Thus, the second radial passages 226 connect the intermediate portion 204B of the internal conduit 204 to the volume V200, by radially passing through the intermediate part 202B of the female body 202.

[0121] The second radial passages 226 are regularly distributed around the longitudinal axis X200. In the example in the figures, there are six of them.

[0122] Alternatively, the number of radial passes 226 may be different, provided that it is greater than or equal to 1, the second radial passes being however preferably regularly distributed around the X200 axis, regardless of their number if it is greater than or equal to 2.

[0123] Advantageously, the number of second radial passes 226 is equal to the number of first radial passes 126.

[0124] The second radial passages 226 are delimited by notches formed on a front edge 202J of the intermediate part 202B and are delimited, on the front, by a rear axial surface 202H of the distal part 202C. On the rear and in a circumferential direction with respect to the longitudinal axis X200, the second radial passages 226 are delimited by the material of the intermediate part 202B. The front edge 202J of the intermediate part 202B is kept in surface contact with the rear axial surface 202H of the distal part 202C due to the sandwiching of the intermediate part 202B between the proximal and distal parts 202A and 202C of the female body 202. This realization of the second radial passages 226 gives good axial compactness to the circuit breaker of the invention.

[0125] The second radial passages 226 each have a cross-section, taken in a plane ortho-radial to the longitudinal axis X200, substantially identical to a cross-section of the first radial passages 126 taken in a plane ortho-radial to the longitudinal axis X100. Thus, the second radial passages 226 have an elongated cross-section, in the sense that their length, measured parallel to the longitudinal axis X200, is strictly greater than their width, measured along a direction ortho-radial to the axis X200. The elongated shape of the first and second radial passages 126 and 226 allows for a maximum flow of fluid inside the circuit breaker 10, in the coupled configuration of the male and female elements 100 and 200, while its radial compactness is improved and the pressure losses of the circuit breaker 10 on the flow of pressurized fluid are minimized in the coupled configuration of the male 100 and female 200 elements.

[0126] Locking slots 230 with a cylindrical cross-section and circular base radially traverse the distal portion 202C, forward of the second radial passages 226. These locking slots 230 open onto an internal surface 202K of the distal portion 202C, which also radially delimits the internal receiving volume V200. More precisely, the locking slots 230 open onto a second internal radial surface 202K2 of the distal portion 202C, which is a front part of the internal surface 202K. In practice, the volume V200 is delimited, radially to the axis X200, by the first radial surface 202G at the axial level of the intermediate part 202B and by the internal surface 202K at the axial level of the distal part 202C. Although formed on different parts 202B and 202C of the body 202, the surfaces 202G and 202K together form the internal peripheral surface of this female body.

[0127] The first radial surface 202G has a constant diameter over its axial length, while the diameter of the internal surface 202K increases as it approaches the opening 200A of the female element 200, through which the male body 102 enters the female body 202 during the fitting of the male and female elements 100 and 200. The internal surface 202K thus includes a third internal radial surface 202K1 adjacent, at the front, to the first internal radial surface 202G along the longitudinal axis X200 and of constant diameter and equal to that of the first internal radial surface 202G. The internal surface 202K also includes the second internal radial surface 202K2, which radially delimits the mouth 200A and has a constant diameter strictly greater than that of the first internal radial surface 202G. A frustoconical portion 202K3 of the internal surface 202K connects its portions 202K1 and 202K2 and diverges towards the mouth 200A.In summary, the internal surface 202K is formed by the union of surfaces 202K1, 202K2 and 202K3.

[0128] Each locking housing 230 receives a locking ball 232 and has a diameter tightened on its internal radial side, strictly less than the diameter of the balls 232, which allows each ball 232 to be retained inside a housing 230, without it falling completely into the internal receiving volume V200.

[0129] Each ball 232 constitutes a locking element and is movable within its locking housing 230 between: - a first internal radial locking position, in which the ball protrudes radially into the receiving volume V200 of the male body 102 and, if it is engaged in the external locking notch 128 of the male body 102, opposes the axial withdrawal, out of the female element 200, of the male body 102 fitted into the volume V200 and - a second external radial release position, in which axial withdrawal of the male body 102 from the female element 200 is possible.

[0130] The geometry of the locking housings 230 and the locking balls 232 is such that the balls are mobile, each in its housing 230, only in a radial direction to the longitudinal axis X200.

[0131] Each second radial passage 226 is formed by a main cylindrical part 226A, the base of which has an oblong cross-section and the axis of the cylinder A226 is radial to the longitudinal axis X200, and a pocket 226B formed in a hollow from the Internal radial surface 202G. The pockets 226B are regularly distributed around the longitudinal axis X200. A portion of the first internal radial surface 202G extends circumferentially to the longitudinal axis X200, between two pockets 226B. In other words, the pockets 226B are formed in hollows, locally around the longitudinal axis X200, from this first internal radial surface 202G.

[0132] The external geometry of the head 210A is identical to the geometry of the head 110A of the valve 110 of the male element 100. In particular, the frustoconical surfaces of the heads 110A and 210A in contact with their respective seat 112, 212 in the closed position have the same inclination, their grooves in which the sealing gaskets 114 and 214 are housed have the same radial and axial geometry and the gaskets 114 and 214 are advantageously identical.

[0133] The valve 210 is traversed by passages 234 which allow a fluid passing through the shut-off valve 10 to transit between the rear portion 204A of the internal conduit 204 and the downstream section 94 of the conduit 9. The valve 210 functions as a check valve. It is configured to move from its forward closed position to its rearward open position when the pressurized fluid present in the intermediate portion 204B of the internal conduit 204 exerts on the head 210A an axial force directed towards the rear of the female body, to the point of disengaging the valve 210 from its seat 212 and freeing a passage for the pressurized fluid which then flows through the shut-off valve, in the direction of the flow arrows E shown in [Fig. 6].

[0134] Longitudinal notches 240 are formed at the front end of the distal part 202C, with a geometry complementary to that of the radial teeth 140 of the male body 102.

[0135] First vents 244 are formed in the distal portion 202C of the female body 202 and fluidly connect the internal volume V200, forward of the second radial passages 226, and the exterior of the female element 200. The first vents 244 traverse radially through the female body 202. These first vents 244 open onto the internal surface 202K, at the level of its third internal radial surface 202K1. Each vent 244 comprises a cylindrical bore 244A aligned with an axis A244 and a pocket 244B formed in relief from the internal surface 202K. The pockets 244B are regularly distributed around the longitudinal axis X200. A portion of the third internal radial surface 202K1 extends circumferentially to the longitudinal axis X200, between two pockets 244B. In other words, the pockets 244B are hollowed out locally around the longitudinal axis X200, from this third internal radial surface 202K1.

[0136] Each axis A244 is inclined with respect to the longitudinal axis X200 and diverges towards the rear of the female body 202. The angle of inclination of an axis A244 is denoted by θ. relative to the longitudinal axis X200. Advantageously, the angle ô is between 40 and 50°, preferably around 45°.

[0137] Advantageously, a rear end of each cylindrical portion 244A opens onto an external radial surface of the female body 202 and is disposed behind a front end of this cylindrical portion 244A.

[0138] Advantageously, the first vents 244 are isolated from the internal conduit 104 in coupled configuration by the proximal joint 132.

[0139] The chosen inclination for the axes A244 prevents external moisture from entering the female element 202, in particular liquid droplets, from entering the female body 202, when the latter is arranged in a vertical position, with its distal part 202C oriented upwards, which is a conventional position in a circuit breaker.

[0140] The internal radial surface 202F of the distal portion 202C is provided with a first internal front radial groove 245 and a second internal rear radial groove 246. The grooves 245 and 246 are connected by a peripheral volume 247. In the assembled configuration of the female body 202, the first groove 245 is arranged radially opposite the second radial passages 226, while the second rear groove 246 is arranged radially opposite the most forward portions of the inclined passages 216. Thus, the first groove 245 constitutes a collector for fluid passing through the second radial passages 226, in a radial and centrifugal direction with respect to the longitudinal axis X200, while the second rear groove 246 constitutes a distributor of fluid towards inclined passages 216 and the peripheral volume 247 connects the aforementioned collector and distributor.

[0141] Second vents 248 are formed in the female body 202 and extend radially through the female body 202. Each second vent 248 comprises a bent bore 248A, a pocket 248B, and a passage 248C. The bent bore 248A and the pocket 248B are formed in the intermediate portion 202B, while the passage 248C is formed in the intermediate portion 202B and in the distal portion 202C. The pockets 248B are recessed in the bearing surface 202D. The second vents 248 open onto this bearing surface. The second vents 248 fluidly connect the internal volume V200, behind the second radial passages 226, with the exterior of the female element 200.The second vents 248 open, on the outside of the female body 202, into an internal volume, delimited between an external radial surface of the proximal part 202C and an internal radial surface of the proximal part 202A, which communicates fluidly with the outside of the female body 202, the second vents 248 being isolated from the internal conduit 104 in coupled configuration, by the radial joint 206, by the frontal joint 208 and by the distal joint 134. .

[0142] An indexing pin 250 extends radially along the longitudinal axis X200 and is interposed between the intermediate part 202B and the distal part 202C of the female body 202. This indexing pin 250 forms an obstacle to the relative rotation of the intermediate 202B and distal 202C parts, which allows the intermediate 202B and distal 202C parts to be angularly indexed around the longitudinal axis X200 relative to each other, thus forming the second vents 248 by radially aligning their parts 248A and 248C. This angular indexing of parts 202B and 202C also allows the second radial passages 226 of the female body to be angularly oriented relative to the first radial passages 126, thanks to the cooperation of the teeth 140 and the longitudinal notches 240.

[0143] Advantageously, the pin 250 is press-fitted into a blind radial recess 252 in the intermediate portion 202B and with a longitudinal clearance J250 in an orifice 254, which passes radially through the distal portion 202C. This longitudinal clearance J250 is shown distributed on either side of the pin 250 in insert A) of [Fig. 2]. It prevents interference with the longitudinal positioning of the intermediate portion 202D and the distal portion 202C, with the front axial surface 202J of the intermediate portion 202B bearing against the rear axial surface 202H of the distal portion 202C. The pin 250 is radially covered by the proximal portion of the body 202A.

[0144] The female element 200 also includes a locking ring 260 which is multipart and slidably mounted around the distal portion 202C of the female body. The locking ring 260 includes an outer sleeve 262, a central portion 264, and a bushing 266. The central portion 264 and the bushing 266, advantageously made of metal, are screwed longitudinally against each other, and the outer sleeve 262, advantageously made of elastically deformable polymer material, is positioned around the screwed central portion 264 and bushing 266.

[0145] The locking ring 260, more particularly its central portion 264, forms an internal cover surface 268 that is inclined with respect to the longitudinal axis X200 and diverges towards the rear of the female body 202. The angle of inclination of the cover surface 268 with respect to the longitudinal axis X200 is denoted by θ. Advantageously, the angle θ is between 40° and 50°, preferably approximately 45°. Preferably, the value of the angle of inclination θ is the same as that of the angle of inclination α of the distal surface S128 of the external locking notch 128 of the male body 102. Thus, in the mated configuration of the male and female elements 100 and 200 of the circuit breaker 10, the internal cover surface 268 is substantially parallel to the distal surface S128.

[0146] A spring 270 is interposed longitudinally between a front face 260A of the locking ring 260 and a rear face 202L of the distal part 202C. The spring 270 elastically pushes the locking ring 260 back towards the rear of the female body 202 by default, so as to maintain contact between the internal covering surface 268 and the balls 232, which elastically pushes them back towards their first locking position.

[0147] Thanks to the locking ring 260 and the spring 270, an elastic retention of the male body 102 in contact, in the direction of the fitting, with the female body 202 in the coupled position of the male and female elements 100 and 200 is obtained, with a maximum flow inside the circuit breaker 10. The elastic return function of the locking ring can be adjusted by the appropriate dimensioning of the spring 270.

[0148] In all its positions relative to the female body 202, the locking ring 260 is radially clear of the external ends of the first vents 244, more particularly of the external ends of the inclined bores 244A which are formed on the external radial surface of the body 202. The ring 260 therefore does not obstruct these vents 244. In particular, internal radial notches 266A are advantageously provided in a recess on an internal radial surface of the sleeve 266 to free the outlet passage of the first vents 244.

[0149] When the male and female elements 100 and 200 are to be coupled, they are aligned on the insertion axis X10, the longitudinal axes X100 and X200 then coinciding with this insertion axis. During the subsequent coupling of the male and female elements 100 and 200, and in the coupled configuration of these elements, the axes X10, X100, and X200 remain coincident.

[0150] The coupling takes place by bringing the male and female elements 100 and 200 together along the shank axis X10. This bringing together can be done by hand or, optionally and not shown, by means of a specific tool.

[0151] Prior to fitting, the radial teeth 140 are aligned longitudinally with the longitudinal notches 240 by orienting the male body 102 angularly relative to the female body 202 around the axis X10, then the male and female elements 100 and 200 are brought together by engaging the radial teeth 140 in the longitudinal notches 240, which allows angular indexing of the male and female bodies 102 and 202.

[0152] By continuing the fitting movement of the male and female elements, the balls 232 are pushed by the external inclined surface S102 towards their external radial release position, the locking ring 260 moving relative to the balls 232 towards the front of the female body 202 against the action of the spring 270, the internal cover surface 268 of the locking ring 260 being kept in contact with the balls 232 by the spring 270, as shown in [Fig.4],

[0153] In the second coupling position shown in insert A) of [Fig.5], the proximal sealing gasket 132 achieves radial cooperation over its entire periphery with the third internal radial surface 202K1 of the distal part 202C, between the opening of the first vents 244 formed by the pockets 244B and the opening of the second radial passages 226 formed by the pockets 226B, while the distal seal 134 makes radial contact over its entire periphery with the first internal radial surface 202G of the intermediate part 202B, between the radial passages 226 and the second vents 248. The balls 232 are still in contact with the external inclined surface S102. The proximal seal 132 and the distal seal 134 then fluidly isolate the first and second radial passages 126, 226 from the outside of the circuit breaker.

[0154] In this second coupling position, the distal stem 110C of the valve 110 comes to rest against the bearing surface 202D.

[0155] The continuation of the axial insertion movement causes the bearing surface 202D to push the distal rod 110C into the through-hole 116 of the distal end 102D of the male body 102, towards the rear of the male body. The distal rod 110C remains in tight contact with the distal end 102D of the male body 102 throughout its entire travel, due to the seal provided by the first rod seal 118.

[0156] This additional axial movement has the effect of moving the valve 110 of the male element towards its rearward opening position of the first internal conduit 104 and reaching the third insertion position shown on insert B) of [Fig.5] where the balls 232 are in external radial release position, and release the passage of the male body 102 into the female body 202, without yet tilting into the locking housings 230.

[0157] During this axial insertion movement, the air trapped in the internal receiving volume V200, between the distal end 102D of the distal part 102C of the male body 102 and the bearing surface 202D of the female body 202, is evacuated to the outside of the circuit breaker through the second vents 248. The air trapped in the housing 120 of the male body, behind the proximal rod 110B, is evacuated through the vent 144.

[0158] The continuation of the insertion movement allows the coupled configuration of [Fig.6] to be reached where the balls 232 are pushed back by the cover surface 268 of the locking ring 260 into their internal radial locking position where they are engaged in the external locking notch 128 and held therein by the action of the locking ring 260 and the spring 270. The balls 232 then form an obstacle to the withdrawal of the male body 102 from the female body 202.

[0159] In this coupled configuration, the first radial passages 126 of the male body 102 are aligned, each in a radial direction to the insertion axis X10, with one of the second radial passages 226 of the female body 202. In this Position also, the proximal sealing gasket 132 and the distal sealing gasket 134 fluidly isolate the first and second radial passages 126, 226 from outside the circuit breaker.

[0160] When fluid flow is established between the male element 100 and the complementary female element 200, as explained above, the valve 210 of the female element is displaced by the pressure of the fluid present in the first conduit 104, against the elastic force exerted by the spring 224. Indeed, in the coupled configuration of the male and female elements 100 and 200, the pressurized fluid present in the conduit 104 flows through the first and second radial passages 106 and 126, which are aligned, then into the collector formed by the first front groove 245, into the peripheral volume 247, into the distributor formed by the second rear groove 246, and into the inclined passages 216, which causes it to exert an axial pushing force on the valve 210 towards the rear of the female body 202, with a greater intensity than that of the elastic force exerted by the spring 224.

[0161] In particular, in the mated configuration of the male and female elements, the internal cover surface 268 of the locking ring 260 is in contact on the front with the balls 232 and maintains these balls in longitudinal contact with the distal surface S128 of the external locking notch 128, which tends to elastically repel the male body 102 towards the bearing surface 202D. The fact that angles a and 0 have the same value contributes to the stability of the circuit breaker 10 in this configuration.

[0162] In the uncoupled configuration of elements 100 and 200 and in the coupled configuration of these elements, the front end of the distal rod 110C extends forward of the front surface of the end 102E. In particular, a non-zero axial clearance J10 exists between the axial surfaces 102E and 202D in the coupled configuration.

[0163] It is noted that the diameter of the third internal radial surface 202K1 of the peripheral surface 202K, with which the proximal seal 132 cooperates radially around its entire periphery, in the coupled configuration of elements 100 and 200, is equal to the diameter of the first internal radial surface 202G, with which the distal seal 134 cooperates radially around its entire periphery, in the coupled configuration of elements 100 and 200. Furthermore, the diameter of the external peripheral surface of the male body 102 with which the proximal seal 132 cooperates radially, at the bottom of the proximal external peripheral groove 136, in the coupled configuration of elements 100 and 200, is equal to the diameter of the external peripheral surface 102F of the male body 102 with which the distal seal 134 cooperates radially, at the bottom of the distal external peripheral groove 134, in coupled configuration of elements 100 and 200.Thus, in the coupled configuration of the male and female elements, the link between the male body 102 and the female body. The 202 is balanced insofar as the proximal seal 132 and the distal seal 134 cooperate radially with the male body 102 and the female body 202, respectively, with the same sealing diameters. Given this geometry of the male and female elements 100 and 200, the pressure inside the male and female bodies 102 and 202 does not exert a force that would tend to separate these bodies along the insertion axis X10. Under these conditions, the locking force exerted by the locking ring 260 and the balls 232 must be sized to withstand only a normalized separation force according to ISO 19880-3 or CSA / ANSI HGV 4.4-2017 in force to date, this force being typically in the range of 300 to 660 N (newtons).As a result, the locking safety in the coupled configuration of male and female elements 100 and 200 is improved insofar as, in the coupled configuration, the pressure in the circuit breaker is balanced.

[0164] From the coupled configuration of the elements 100 and 200, if the vehicle 8 moves away from the filling terminal 4, to the point of exerting a force on the pipe 9 greater than the normalized separation force, a movement of the distal inclined surface S128 of the external locking notch 128 relative to the locking balls 232, towards the rear of the male element 100 causes a displacement of these balls in a centrifugal direction relative to the fitting axis X10, towards their external radial release position, this against the action of the spring 270. This induces the uncoupling of the male and female elements of the circuit breaker 10.

[0165] In the event of uncoupling, when the male body 102 is moved out of the internal receiving volume V200, the valves 110 and 210 close, being pushed back respectively by the springs 124, 224 associated with them. The valve 110 comes into tight contact with the male body 102, while the distal sealing gasket 134 is always interposed between the radial passages 126, 226 and the second vents 248 and the proximal sealing gasket 132 is always interposed between the radial passages 126, 226 and the first vents 244, the distal sealing gasket 134 and the proximal sealing gasket 132 fluidly isolating the radial passages 126, 226 from the outside of the circuit breaker.The closure of the passage of pressurized fluid in the internal conduit of the circuit breaker 10 formed by the joining of the internal conduits 104 and 204 causes the valve 210 of the female element to close, which, when it is no longer subjected to fluid pressure, is returned to its closed position by the spring 224.

[0166] The distances dl36 and dl38 are such that, during the uncoupling of the male and female elements, the distal sealing joint 132 is radially aligned with the second radial passages 226 when the proximal joint 134 reaches radial alignment with the first vents 244. This induces a near-simultaneous loss of sealing. distal seals 134 and proximal seals 132, which allows the purging of the fluid trapped in the female body 202 and the male body 102 to be distributed between the two valve heads 210A and 110A, at the level of the two distal seals 134 and proximal seals 132.

[0167] In addition, the presence of pockets 226B and 244B allows the proximal sealing joint 132 and the distal sealing joint 134 to be held in position during purging at uncoupling by partial cooperation of the third internal radial surface 202K1 with the proximal sealing joint 132 and partial cooperation of the first internal radial surface 202G with the distal sealing joint 134.

[0168] The pressurized fluid trapped in the portion of the internal conduit 104 of the male body 102, which is located in front of the valve 110, and in the portion of the internal conduit 204 of the female body 202, which is located in front of the female valve 210, can be rapidly purged respectively to the outside of the shut-off valve via the first and second vents 244 and 248 since the seal between the distal sealing gasket 134 and the female body 202 is interrupted at the second radial passages 226 at the same time as the seal between the proximal sealing gasket 132 and the female body 202 is interrupted at the first vents 244. In other words, the loss of seal with the female body occurs simultaneously for the first proximal sealing gasket 132 and for the distal sealing gasket 134.

[0169] In the second, third, and fourth embodiments shown in Figures 7 to 11, the elements analogous to those in the first embodiment bear the same reference numerals. In what follows, if a reference numeral is mentioned in the description but not shown in a figure, or shown in a figure but not mentioned in the description, it corresponds to the same element as the one bearing the same reference numeral in the first embodiment. The following primarily describes what distinguishes the first, second, and third embodiments from the first embodiment.

[0170] In the second embodiment shown in Figures 7 to 9, the male body 102 is composed of two parts, namely a proximal part 102A and a distal part 102C, which are screwed together without the interposition of an intermediate part. A portion of the proximal part 102A forms a housing 120, comparable to that of the first embodiment, into which a proximal stem 110B of a valve 110 of this male element is engaged.

[0171] A valve 210 is mounted in the body 202 of the female element 200, which consists of a proximal part 202A, an intermediate part 202B and a distal part 202C, as in the first embodiment.

[0172] As in the first embodiment, a proximal sealing gasket 132 and a distal sealing gasket 134 are mounted on either side of the first passages radials 126, respectively in grooves 136 and 138 located at axial distances dl36 and dl38 which are different from each other, with respect to a median plane P126 of the first radial passages. The distance dl38 is strictly greater than the distance dl36 and the ratio dl38 / dl36 can take the values ​​indicated above for the first embodiment.

[0173] Second radial passages 226 open radially to the outside into a peripheral volume 247 which extends to inclined passages 216 comparable to those of the first embodiment. In other words, in this second embodiment, neither a collector nor a distributor is used as in the first embodiment.

[0174] The female body 202 comprises, in addition to proximal 202A, intermediate 202B and distal 202C parts, a sleeve 202M which is screwed onto the outside of the distal part 202C and which forms a cylindrical surface 202N, with a circular cross-section around the longitudinal axis X200, for guiding the male body 102 in fitting into the female body 202.

[0175] Unlike the first embodiment, the circuit breaker 10 of the second embodiment does not include locking balls but a single locking member formed by a spring 233 with inclined coils, which is housed with reduced longitudinal clearance in an internal peripheral groove 235 of the distal portion 202C of the female body 202. This spring may be of the "bal spring" type marketed by Bal Seal Engineering, or of any other equivalent type. Preferably, the spring 233 is shaped into a ring. In other words, the spring 233 is contained within a toroidal volume. The spring 233 is welded to itself before being placed in the internal peripheral groove 235; the ring is then closed. Alternatively, the spring 233 is shaped into a ring in the internal peripheral groove 235 from a longitudinal spring. In this latter case, the ring is open.Preferably, the spring 233 extends all around the longitudinal axis X200 when it is in place in the internal peripheral groove 235. It is designed to deform elastically to engage in an external locking notch 128 formed on the external peripheral surface 102F of the male body 102, during the fitting of the male element 100 and the female element 200. In particular, at the point of contact with the external peripheral surface 102F, whose diameters vary, compressive forces perpendicular to the longitudinal axis X200 are applied to the coils of the spring 233. Thus, the spring 233 is configured to move from the first locking position, where the spring 233 is engaged in the external locking notch 128, to oppose the axial withdrawal of the male body 102 from the female body 202 in the coupled configuration, to the second release position, where Axial withdrawal of the male body from the female body is possible.Indeed, in the second release position, the spring 233 is compressed in the throat. internal peripheral 235 of the distal part 202C and releases the passage for the male body 102 into the internal volume V200 of the female body 202. In the first locking position, the spring 233 forms an obstacle to the passage of the male body 102 into the female body 202 in the direction of axial withdrawal of the male body 102 out of the female body 202.

[0176] No locking ring comparable to the locking ring 260 of the first embodiment is used in the second embodiment.

[0177] Since the locking spring 233 is concealed inside the female element 200, it cannot be touched, which is favorable in terms of operational safety and reliability of the circuit breaker 10. This also improves the radial compactness of the circuit breaker.

[0178] An inclined surface S102, here of geometry in section of sphere, serves to bring the spring 233 into engagement in the locking notch, as in the first embodiment.

[0179] The angular indexing between the male and female bodies 102 and 202 is obtained by hexagonal shapes visible on the insert B) of the [Fig.9] which come into contact after the passage of the valve 110 of the male element 100 from its advanced closing position to its receding opening position, due to the support of the distal rod 110C on a support surface 202D formed by the female body 202, as in the first embodiment.

[0180] More specifically, an external hexagonal surface 102P of the distal part 102C of the male body and an internal hexagonal surface 202P of the distal part 202C of the female body together constitute indexing means for the male and female bodies 102 and 202 around the shank axis X10.

[0181] Furthermore, instead of a pin as in the first embodiment, an indexing ball 251 is provided between the intermediate and distal portions 202B and 202C of the female body. This indexing ball 251 is inserted with reduced radial axial clearance into a recess provided in one of these portions and with slight axial clearance into another recess provided in the other portion.

[0182] In addition, a slow leak passage 210D is provided through the head 210A of the valve 210, which allows a low and controlled flow of fluid through the valve 210, including when it is supported on its seat 212 as in the positions of figures 7 and 8.

[0183] In the coupled configuration of the male and female elements shown in [Fig.9], the first radial passages 126 and the second radial passages 226 are aligned axially, along the shank axis X10 and radially, around this axis.

[0184] Figures 7 and 8 respectively represent a first and second position during the fitting of the male and female elements 100 and 200, then Figure 9 represents a coupled configuration of these elements. Otherwise, the operation of the circuit breaker 10 in this second embodiment is comparable to that of the first embodiment.

[0185] In the third embodiment shown in [Fig. 10], respectively in intermediate coupling position on insert A) and in coupled configuration on insert B), the valve 110 of the male element 100 comprises, as in the first embodiment, a head 110A, a proximal stem 110B and a distal stem 110C.

[0186] Here, the valve 210 of the female element 200 also includes a head 210A, a proximal stem 210B and a distal stem 210C which protrudes from the bearing surface 202D.

[0187] The valve 110 extends along a longitudinal axis XI10 on which it is centered. The valve 210 extends along a longitudinal axis X210 on which it is centered. The axes XI10 and X210 are parallel to the mounting axis.

[0188] The valve 110 is similar to those of the first and second embodiments and functions in the same way. The valve 210 functions in a comparable manner to the valve 110. The valve head 110A carries a seal similar to the seal 114 of the first embodiment. The valve head 210A is without a seal and bears against a seat similar to the seat 212 of the first embodiment under the action of a return spring.

[0189] The proximal stem 210B is engaged in an axial housing 220 delimited by the female body 202, in a manner comparable to the proximal stem 110B of the valve 110 which is engaged in a housing 120 of the male body 102, as in the first embodiment. A vent 222 connects the housing 220 to the outside of the female body, just as the vent 144 connects the housing 120 to the outside of the male body.

[0190] The proximal stem 210C of the valve 210 of the female element 200 is configured to bear against the front end surface 102E of the male body 102, whereas, as in the first embodiment, the proximal stem 110C of the valve 110 bears against the bearing surface 202D formed by the female body 202. In other words, the front end surface 102E of the male body constitutes a bearing surface for a proximal stem of valve 210C.

[0191] This allows the actuation of the valve 210 of the female element to be carried out not by the pressure of the fluid in the internal conduit 104 but by the body 102 of the male element 100. A double closure is thus achieved within the circuit breaker 10 and the opening positions of the two valves 110 and 210 are managed precisely, which allows a maximum flow of fluid in the coupled configuration of the male and female elements 100 and 200.

[0192] This requires a radial offset, relative to the X10 mounting axis between, on the one hand, a contact zone between the male body 102 and the valve 210 and, on the other hand, a contact zone between the female body 202 and the valve 110.

[0193] In the embodiment of [Fig. 10], the central longitudinal axes XI10 and X210 of the valves 110 and 210, in particular of the proximal stems 110C and 210C, are radially offset from each other and radially offset from the longitudinal axis X100, respectively X200, which imposes precise radial indexing around the fitting axis X10, between the male and female elements 100 and 200.

[0194] In the fourth embodiment shown in [Fig.1 1], each valve 110 of the male element 100 or 210 of the female element 200 is also operated to open by the body of the other element.

[0195] In the fourth embodiment, the distal stems 110C and 210C of the valves 110 and 210 which belong respectively to the male element 100 and the female element 200 of the circuit breaker 10 are coaxial, advantageously centered on the mounting axis X10.

[0196] The valve 110 of the male element 100 comprises a tip 110E fixed to its distal stem 110C and whose front faces 110F are in portions of a circle and configured to come into contact with the bearing surface 202D of the female body 202, during fitting as shown on insert A) of [Fig. 11] or in coupled configuration as shown on insert B). These front faces 110F are radially offset from a front end surface 102E of the male body which is here formed by a terminal bar of the male body and which forms a bearing surface configured to come into contact with the front end of the proximal stem 210C of the valve 210 of the female element.

[0197] During coupling, the contact between the front end surface 102E and the valve 210 is concomitant with the contact of the tip 110E with the bearing surface 202D.

[0198] The tip is configured to protrude forward from the male body 102 through two openings formed on either side of the terminal bar, these openings being visible in insert C) of [Fig. 11]. In insert C) of [Fig. 11], and for clarity of the drawing, the seals 114, 132 and 134 are not shown.

[0199] The contact area between the bearing surface 102E of the male body 102 and the valve 210 and the contact area between the bearing surface 202D of the female body 202 and the valve 110 are offset from each other radially to the mounting axis X10. In particular, in the fourth embodiment, the contact area between the bearing surface 202D of the female body 202 and the valve 110 surrounds the contact area between the bearing surface 102E of the male body 102 and the valve 210.

[0200] In the coupled configuration of the male and female elements, the tip 110E is received in a housing 117 formed within the distal end 102D of the male body 102. The housing 117 has a diameter greater than the sealing diameter between the distal stem 110 and the distal end 102D, this sealing diameter being defined by the first stem sealing joint 118.

[0201] In uncoupled configuration or in an intermediate coupling position shown on insert A) of [Fig.11], the tip 110 protrudes forward from the end 102D, in particular from its front end surface 102E.

[0202] In the third and fourth embodiments, the head 210A of the valve 210 of the female element 200 is equipped with a slow leak passage 210D, with the same function as the slow leak passage 210D of the second embodiment.

[0203] In the second, third and fourth embodiments, the use of a slow leakage passage is optional.

[0204] According to an unrepresented variant of the invention, the indexing of the male and female bodies 102 and 202 around the X10 mounting axis can be associated with a keying mechanism which allows the coupling of only one type of male body with only one type of female body.

[0205] In the third and fourth embodiments, distances comparable to the dl36 and dl38 distances of the first two embodiments can also be defined, with respect to a median plane of the first radial passages 126. The distance associated with the distal sealing joint 134 is strictly greater than the distance associated with the proximal sealing joint 132, preferably at least 1.5 times greater, preferably still at least 1.75 times greater.

[0206] In all embodiments, the locking member(s) are elastically returned to their first locking position by the elastic force of the locking ring 260 on the balls 232 or by elastic deformation of the spring 233 itself.

[0207] In all embodiments, the external inclined surface S102 reduces the insertion force of the male and female elements 100 and 200 and secures the coupled configuration of these elements. In the event of incomplete coupling of these elements, the locking member(s) 232 or 233, in contact with the external inclined surface S102, exert a force to withdraw the male body from the female body and return these elements to the uncoupled configuration, with their respective valves 110 and 210 closed.

[0208] In the example shown in the figures, the circuit breaker 10 is configured for the passage of pressurized liquid hydrogen, with a pressure between 300 and 900 bar. Alternatively, it is configured for the passage of another pressurized fluid, liquid or gaseous, for example natural gas.

[0209] In an unshown embodiment, the axis of the cylinder forming each first radial passage 126 is inclined, up to 45°, with respect to the radial direction to the longitudinal axis X100. In this case, the median radial plane to be considered is the radial plane passing through the middle, along the longitudinal axis X100, from the mouth of the first radial passages to the level of the external peripheral surface 102F of the male body 102.

[0210] In an unshown variant, the axis of the cylinder A226 forming each second radial passage 226 is inclined, up to 45°, with respect to the radial direction to the longitudinal axis X200.

[0211] In an alternative embodiment not shown, the seal 114 can cooperate longitudinally with the distal portion 102C of the male body 102. The sealing portion of the valve head 110A is then in longitudinal abutment against the male body via the seal 114 in the closed position of the first valve 110. Similarly, the seal 214 can cooperate longitudinally with the intermediate portion 202B of the female body 202. The sealing portion of the valve head 210A is then in longitudinal abutment against the female body via the seal 214 in the closed position of the second valve 210.

[0212] Any feature described above for one embodiment or variant is applicable to other embodiments and variants, insofar as this is technically possible.< / e> < / e> < / e>

Claims

1. Demands Circuit breaker (10) for connecting two sections (92, 94) of piping (9) of a pressurized fluid handling installation (2), this circuit breaker comprising a male element (100) and a female element (200) intended to fit into each other along a fitting axis (X10), the male element comprising - a male body (102) centered on the mounting axis (X10) and comprising: • a first internal conduit (104) for circulating fluid under pressure; • at least one first radial passage (126) connecting the first internal conduit (104) to an external peripheral surface (102F) of the male body; and • an external locking notch (128), - a first valve (110), movable in the first internal conduit (104), along the mounting axis (X10), between an advanced closed position of the first internal conduit (104) and a retracted open position of the first internal conduit, and comprising a sealing portion (110A), which is in longitudinal forward abutment against the male body in the closed position of the first valve; and - a spring (124) pushing the first valve (110) towards the advanced closing position; the female element comprising - a female body (202) comprising a second internal conduit (204) for circulating pressurized fluid and at least one second radial passage (226) connecting the second internal conduit to an internal volume (V200) for receiving the male body within the female body; - a second valve (210) movable within the second internal conduit - at least one locking member (232; 233) received in a locking housing (230, 235) and configured to move from a first locking position, where the locking member is engaged in the external locking notch (128), to oppose axial withdrawal of the male body (102) from the female body (202) by coupled configuration of the male (100) and female (200) elements, in a second release position, where axial withdrawal of the male body (102) from the female body (202) is possible, in which, in a coupled configuration of male and female elements, • the first and second radial passages (126, 226) are in fluidic communication; • the locking member or members (232; 233) is in the first locking position; • the first valve (110) is in the retracted open position; • a proximal sealing gasket (132) and a distal sealing gasket (134) are arranged, along the insertion axis (X10), on either side of the first and second radial passages (126, 226) and cooperate radially respectively with an internal radial surface (202G, 202K1) of the female body (202) delimiting the internal volume (V200) and with the external peripheral surface (102F) of the male body so as to fluidly isolate the first and second radial passages (126, 226) from the outside of the circuit breaker, characterized in that - the first valve (110) also includes a distal stem (HOC) which is mounted to slide, between the advanced closing position and the recoiling opening position, in a housing (116) of the male body (102) passing through a distal end (102D) of the male body; - a first radial rod seal (118) cooperates radially with the distal stem (110C) and with the distal end (102D) of the male body; - the female element (200) includes a bearing surface (202D) configured to come into contact with the first valve (110) and move it, when the male and female elements are fitted together, from the advanced closing position to the rearward opening position; - in an intermediate coupling position of the male (100) and female (200) elements, • the first valve (110) is in the advanced closed position and in contact with the bearing surface (202D) of the female element; • each locking member (232, 233) is not in the first locking position; • the proximal sealing gasket (132) and the distal sealing gasket (134) are arranged, along the shank axis (X10), on either side of the first and second radial passages (126, 226) and fluidly isolate the first and second radial passages (126, 226) from the outside of the circuit breaker; - the proximal sealing joint (132) and the distal sealing joint (134) are respectively received in a proximal external peripheral groove (136) and in a distal external peripheral groove (138) of the external peripheral surface (102F) of the male body (102); - a first longitudinal distance (dl38), measured parallel to the axis of the joint (X10) between the distal external peripheral groove (138) and a median radial plane (P126) of the first radial passage (126), is strictly greater than a second longitudinal distance (dl36), measured parallel to the axis of the joint between the proximal external peripheral groove (136) and the median radial plane (P126).

2. Circuit breaker according to claim 1, wherein a ratio (dl38 / dl36) between the first longitudinal distance (dl38) and the second longitudinal distance (dl36) is greater than or equal to 1.5, preferably 1.

75.

3. Circuit breaker according to any one of the preceding claims, wherein the female body (200) comprises - at least one first vent (244), which radially passes through the female body and fluidly connects the internal volume (V200) in front of the second radial passage (226) and the outside of the circuit breaker; - at least one second vent (248) which radially traverses the female body and fluidly connects the internal volume (V200) of the female body, behind the second radial passage, and outside the circuit breaker, in which, in the mated configuration of the male (100) and female (200) elements and in the intermediate mating position, the first and second radial passages (126, 226) are isolated from the first and second vents (244, 248) respectively by the proximal (132) and distal (134) sealing gaskets.

4. Circuit breaker according to claim 3, wherein, when uncoupling the male and female elements from the mated configuration, the distal sealing gasket (132) is radially aligned with the second radial passage (226) when the proximal sealing gasket (134) comes into radial alignment with the first vent (244).

5. Circuit breaker according to any one of claims 3 or 4, wherein the first vent (244) and the second passage (226) each open onto an internal radial surface (202G, 202K1) of the female body (202) at the level of pockets (244B, 226B) formed in hollows, locally around the insertion axis (X10), from this internal radial surface.

6. Circuit breaker according to any one of claims 3 to 5, wherein the first vent (244) comprises a cylindrical portion (244A) inclined with respect to the mounting axis and having a rear end open onto an external radial surface of the female body (202) and is disposed behind a front end of the cylindrical portion (244A).

7. Circuit breaker according to any one of the preceding claims comprising several locking members, wherein each locking member is a ball (232) movable in a locking housing (230) which passes radially through the female body, the female element comprising a locking ring (260) which is slidably mounted around the female body (202) and which surrounds the locking members, the locking ring being elastically returned to the rear, the locking ring being in contact on the rear, in mated configuration of the male (100) and female (200) elements, with the balls by an internal cover surface (268) inclined with respect to the mounting axis (X10) and diverging towards the rear of the female body.

8. Circuit breaker according to any one of claims 1 to 6, wherein the locking member is a locking spring (233) housed in a locking housing (235) formed by an internal peripheral groove (235) of the female body (202), the locking spring being configured to deform elastically between its first locking position and its second release position.

9. Circuit breaker according to any one of the preceding claims, wherein each second radial passage (226) is longitudinally delimited by a first part (202C) and by a second part (202B) of the female body, distinct from the first part, the second part (202B) and the first part (202C) being joined longitudinally against each other, and wherein, in the mated configuration and in the intermediate mating configuration, the proximal sealing joint (132) cooperates radially with an internal radial surface (202K1) belonging to the first part (202C) and the distal sealing joint (134) cooperates radially with an internal radial surface (202G) belonging to the second part (202B).

10. Circuit breaker according to any one of the preceding claims, wherein each first radial passage (126) and each second radial passage (223) has an elongated cross-section, with a maximum dimension parallel to the mounting axis (X10).

11. Circuit breaker according to any one of the preceding claims, wherein the first valve (110) comprises a proximal stem (110B) sliding in a housing (120) of the male body (102) between the forward closed position and the rearward open position, with radial interposition of a second stem seal (122), wherein the first stem seal (118) is mounted in an internal peripheral groove of the male body, while the second stem seal (122) is housed in an external peripheral groove of the proximal stem, and wherein a ratio ( <e>1 / <1> 2) between, on the one hand, a diameter (¢1) of the proximal stem and, on the other hand, a diameter (¢2) of the distal stem (110C) is between 0.95 and 1.

12. Circuit breaker according to claim 11, wherein the housing (120) of the male body (102) where the proximal rod (110B) is received is formed in an intermediate portion (102B) of the male body mounted in longitudinal, sealed contact with a proximal portion (102A) of the male body, configured to be connected to a section (92) of pressurized fluid channel (9), and in longitudinally sealed contact with a distal part (102C) of the male body which carries the proximal (132) and distal (134) sealing joints.

13. Circuit breaker according to any one of the preceding claims, wherein, in the coupled configuration of the male (100) and female (200) elements, - a diameter of an internal radial surface (202K1) of the female body (202) with which the proximal sealing joint (132) cooperates radially is equal to a diameter of an internal radial surface (202G) of the female body with which the distal sealing joint (134) cooperates radially; and - a diameter of an external peripheral surface (102F) of the male body (102) with which the proximal sealing joint (132) cooperates radially is equal to a diameter of an external peripheral surface (102F) of the male body with which the distal sealing joint (134) cooperates radially.

14. Circuit breaker according to any one of the preceding claims, wherein the second valve (210) comprises a distal stem (210C) which is slidably mounted in a through-hole of the female body (202), wherein the male body (102) forms a bearing surface (102E) configured to contact the second valve and move it, upon insertion of the male (100) and female (200) elements, from an advanced closed position to a rearward open position, wherein the bearing surface (202D) configured to contact the first valve (110) is formed on the female body (202), and wherein a contact area between the bearing surface (102E) of the male body (102) and the second valve (210) and a contact area between the bearing surface (202D) of the female body (202) and the first valve (110) are radially offset from each other.

15. A pressurized fluid handling installation comprising a pressurized fluid source (4) and a first portion (62) of a fitting (6) intended to be coupled to a second portion (64) of a fitting connected to a fluid storage or utilization volume (82), the first portion (62) of the fitting being fluidly connected to the source by a pipeline (9), characterized in that a circuit breaker (10) according to one of the preceding claims is fluidly connected to the source (4) by a first section (92) of the pipeline and to the first part (62) of the fitting (6) by a second section (94) of the pipeline.< / e>

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