SE539472C2

SE539472C2 - A coupling device for establishing a fluid connection between a first container and a second container

Info

Publication number: SE539472C2
Application number: SE1650398A
Authority: SE
Inventors: Kopplin Gerhard; BÄCKSTRÖM Markus; Nilsson Göran
Original assignee: Mann Teknik Ab
Priority date: 2016-03-29
Filing date: 2016-03-29
Publication date: 2017-09-26
Also published as: SE1650398A1

Description

A COUPLING DEVICE FOR ESTABLISHING A FLUID CONNECTION BETWEEN A FIRST CONTAINER AND A SECOND CONTAINER TECHNICAL FIELD The present invention relates to a coupling device of bayonet mount type for establishing a fluid connection between a first container and a second container, said coupling device including a first coupling member for connection to the first container and a second coupling member for connection to the second container, - said first coupling member comprising: - a first flow conduit for the fluid; and - a first valve located in the first flow conduit and arranged to permit fluid passage through the first flow conduit when the first coupling member is fluid-tightly connected to the second coupling member; and - said second coupling member comprising: - a second flow conduit for the fluid; and - a second valve located in the second flow conduit and arranged to permit fluid passage through the second flow conduit when the second coupling member is fluid-tightly connected to the first coupling member; said coupling device having: - a first coupling state, where the coupling members are disengaged from each other and where the valves are arranged to prevent fluid passage through the flow conduits; as well as - a second coupling state, where the coupling members are fluid-tightly coupled to each other and where the valves are arranged to permit fluid passage through the flow conduits to permit fluid communication between the containers; and - a third coupling state between in which state a fluid leakage conduit is arranged to conduct possible fluid leakage leaking from any of the first valve and/or second valve so that said possible fluid leakage can be detected before disengaging the coupling members from each other; said coupling device further including: a locking device, having a locking end and a handle end, said locking end being arranged to automatically enter into co-active engagement with a first rotation stopping means of the second coupling member in the third coupling state which prevents the coupling members from being moved from the second coupling state to the first coupling state without an intermediate stop in the third coupling state, said locking end further being arranged to be manually released from said co-active engagement via said handle.

BACKGROUND ART For transferring a fluid,i. e.a liquid or a gas or a mixture thereof, between two containers,e. g.a stationary container and a mobile container, such as tank trucks and tanks transported on railway, equipment is used that comprises coupling devices, which are opened and closed automatically when a hose or filling arm is being connected or disconnected. Such a coupling device includes two coupling members or coupling halves, usually designated male member and female member, both of which include a valve forming piston. The two ends of the male and female members facing on to each other are shaped to together form a bayonet mount. The piston of the male member is normally biased by a spring in order to take a self-closing starting position or rest position. The male member may be located in a joint to the stationary container, for example, and the female member may be carried by a hose. The interconnection between the female and male members and the fluid connection between the containers is established by an operator rotating the female member in relation to the male member. During the initial rotation, the coupling members are first locked so that they are fixed axially relative each other and so that a fluid-tight connection is established between the coupling members. Upon continued rotation, the respective coupling parts are opened mechanically, so that the flow conduits of the coupling members get connected with each other. The mechanical opening is carried out in that the piston of the female member is axially displaced in the direction of the piston of the male member. For this purpose, the female member includes a driving device that includes cam curves, which transform said rotary motion into an axial rectilinear motion of the piston of the female member. During this rectilinear motion, the piston of the female member is brought from a closed starting position to an open position simultaneously as the piston of the female member applies force to the piston of the male member and presses it away from its closed starting position to an open position.

The establishing of a connection between the coupling members consequently includes first locking the coupling members axially and fluid-tightly to each other, and then opening the valve in each coupling member so that a fluid passage through the coupling is established The severing of the connection between the coupling members is carried out in the same way as the interconnection, but in reversed order. The operator rotates the female member in relation to the male member in a direction that is opposite the one at the interconnecting operation. By this rotary motion, the piston of the female member is caused to make a rectilinear motion away from its open position to its closed starting position. Simultaneously also the spring-loaded piston of the male member is permitted to return from its open position to its closed starting position. Upon continued rotary motion, the axial fixation between the coupling members is unlocked, whereby the disconnection of the coupling is completed.

Coupling devices of the kind referred to above are disclosed in SE 507 753 C2 and SE 533 006 C2, for example.

A problem with this type of coupling device is that the operator cannot know for certain that the valves of both coupling members have returned to their closed starting positions before the disconnection of the coupling is completed. If any of the valves for some reason does not shut completely when the coupling is disconnected, the fluid risks leaking out. If the leakage is heavy, it may in this first position be difficult to reestablish the connection between the coupling members, so that there is a risk of an extensive leakage to the environment.

That problem is overcome with the coupling device disclosed in SE 537 939 C2, that coupling device can be defined as specified above under the heading Technical Field. However, the coupling disclosed in SE 537 939 C2 shows some shortcomings with respect to secure handling and functionality and there is a need for an improved coupling device.

SUMMARY OF THE INVENTION The object of the present invention is to offer an improved coupling device which fulfil at least one of the following objects: • permits a reliable assessment of whether the coupling device is in the third coupling state, • provides an indication of that the valves of the coupling members really are completely shut, and • facilitates a disconnection of the coupling members from each other.

This is achieved in that the coupling device specified above under the heading Technical Field further includes: a force exerting means is arranged at the outside of said first coupling member for provision of a force on said handle for automatically position said locking end in said co-active engagement with said rotation stopping means.

By providing the force exerting means exteriorly of the coupling device, it is possible to get a reliable assessment of whether the coupling device is in the third coupling state as well as an indication of that the valves of the coupling members really are completely shut. In addition, even if the coupling members are frozen to each other, it is possible to loosen the locking device from its grip in the second coupling member by manually affecting the locking device, e.g. hitting the handle portion of the lever with a hammer, if necessary.

To get exact positions for the third coupling states when the two coupling members are connected to each other, it is suitable that the second coupling member has an exterior surface portion provided with at least one recess, which recess is adapted to receive the locking end of the locking device. If desired, the exterior cylindrical surface of the second coupling member may be arranged with another recess which also is adapted to receive the locking end of the locking device. This other recess corresponds to the position for the second coupling state and is circumferentially spaced a distance apart from the position for the third coupling stage recess.

It is preferred that the recess comprises a locking surface extending inwards from the exterior cylindrical surface portion in substantially radial direction. The locking surface shall be arranged to co-act with the locking end of the locking device to block a disengaging rotary movement of the first coupling member unless the locking end is manually affected, e.g. by pivoting the handle end of the lever.

To increase the visibility of the position of the coupling stages, the recesses preferably have such an extension along the second coupling member that a part of each of them is visible when the coupling members are connected to each other.

To ensure that the locking end of the locking device does not leave the recesses inadvertently, it is suitable that a spring is provided for pressing the locking end of the lever against the recess in the second coupling member.

BRIEF DESCRIPTION OF THE DRAWINGS In the following, the invention will be described in more detail with reference to preferred embodiments and the appended drawings. Fig. 1 is a cross-sectional view of a female member and a male member in an embodiment of a coupling device according to the invention, which coupling device is in a first coupling state. Fig. 2 is a cross-sectional view of a swivel sleeve of the female member of Fig. 1.

Fig. 3 is an isometric view of the swivel sleeve of Fig. 2.

Fig. 4A is a cross-sectional view of a hose unit body of the female member of Fig. 1 taken along line IV-IV in Fig. 4B.

Fig. 4B is a plan view of the hose unit body of Fig. 4A.

Fig. 5 is an isometric view of the hose unit body of Figs. 4A and 4B.

Fig. 6 is a cross-sectional view of a swivel ring of the female member of Fig. 1.

Fig. 7 is an isometric view of the swivel ring of Fig. 6.

Fig. 8 is a cross-sectional view of a driving plate of the female member of Fig. 1.

Fig. 9 is an isometric view of the driving plate of Fig. 8.

Fig. 10 is a side view of a piston stem of the female member of Fig. 1.

Fig. 11 is an isometric view of the piston stem of Fig. 10.

Fig. 12 is a side view of a piston of the female member of Fig. 1.

Fig. 13 is an isometric view of the piston of Fig. 12.

Fig. 14A is a cross-sectional view of a tank unit body of the male member of Fig. 1 taken along line XIVA-XIVA in Fig. 14B.

Fig. 14B is a plan view of the tank unit body of Fig. 14A.

Fig. 15 is an isometric view of the tank unit body of Figs. 14A and 14 B.

Fig. 16 is a cross-sectional view of the tank unit body of Figs. 14A-14C taken along line XVI-XVI in Fig. 14B.

Fig. 17 is a side view of a piston of the male member of Fig. 1.

Fig. 18 is an isometric view of the piston of Fig. 17.

Fig. 19 is a front view of the female member of Fig. 1, where the female member is in the first coupling state.

Fig. 20 is a cross-sectional view of the coupling device of Fig. 1 at the start of a connecting operation.

Fig. 21 is a front view of the female member of Fig. 1, where the female member is in a third coupling state.

Fig. 22 is a cross-sectional view of the coupling device of Fig. 1 in the third coupling state.

Fig. 23 is a front view of the female member of Fig. 1, where the female member is in a second coupling state.

Fig. 24 is a cross-sectional view of the coupling device of Fig. 1 in the second coupling state.

Fig. 25 is a detail view of the encircled area XXV in Fig. 20.

Fig. 26 is a detail view of the encircled area XXVI in Fig. 22.

Fig. 27 is a detail view of the encircled area XXVII in Fig. 24.

Fig. 28 is a cross-sectional view of a locking device having a pivotal locking lever for locking the female member and the male member of the coupling device of Fig. 1 to each other in the second and third coupling states. Fig. 29 is an isometric view of a cradle used for the pivotal lever in the locking device of Fig. 28.

Fig. 30 is an isometric view of a piston guide for guiding the piston of Figs. 17 and 18.

Fig. 31 is isometric view of an alternative embodiment of the tank unit body.

Fig. 32 is a detail view of the alternative embodiment of the tank unit body.

MODE(S) FOR CARRYING OUT THE INVENTION With reference to the figures, a coupling device for LNG (Liquefied Natural Gas) is shown. The coupling device comprises a first coupling member or female member 1 and a second coupling member or male member 2. The coupling members 1 and 2 include grip members, which, when they are brought together and rotated around the center axis 3 of the coupling device, form a bayonet type mount.

The female member 1 is designed to be connected to a hose (not shown), and therefore it may also be called hose unit. The male member 2 is designed to be connected to a tank (not shown), and therefore it may also be called tank unit.

The female member 1 comprises a swivel sleeve 100, a hose unit body 200, a swivel ring 300, a driving plate 400, a piston stem 500, and a hose unit piston 600. The male member 2 comprises a tank unit body 700 and a tank unit piston 800.

The swivel sleeve 100{ videFigs. 2 and 3) is an integral piece and has a front, open,i. e.penetrated, end surface 101 and a rear, open,i. e.penetrated, end surface 102, which end surfaces 101,102are parallel to each other. The front end surface 101 encircles a front end opening 103, and the rear end surface 102 encircles a rear end opening 104 of the sleeve 100. The sleeve 100 thus has an axially through-going opening 105, which extends between the two end openings103, 104.The axially through-going opening 105 comprises a front cylindrical space 106 that extends from the front end surface 101 and changes into an inner cylindrical space 107 of a slightly smaller diameter than that of the front space 106. The inner space 107 in turn changes into a rear cylindrical space 108 having an internal thread 109 for receiving a hose connection (not shown). At the transition between the inner space 107 and the rear space 108, the sleeve 100 has an internal annular radial flange 110 of a diameter that is smaller than the inner space 107 and thereby forms an annular support surface 111 facing on to the inner space 107. At the front end opening 103 the sleeve 100 has an internal peripheral quarter-circular groove 112 for cooperation with a rotary bearing 4{ videFig. 1). At a short distance from the front end opening 103, approximately at the transition between the front cylindrical space 106 and the inner cylindrical space 107, the sleeve 100 has an external annular radial flange 113 forming an annular support surface 114 facing on to the front opening 103. Between the support surface 114 and the plane of the front opening 103, the sleeve 100 has a cylindrical outer surface 115, having an external thread 116 for cooperation with the swivel ring 300{ videFig. 1).

Also the hose unit body 200{ videFigs. 4A, 4B and 5) is a single integral piece and has a front, open,i. e.penetrated, end surface 201 and a rear, open,i. e.penetrated, end surface 202, which open end surfaces201, 202are parallel to each other. The front end surface 201 encircles a front end opening 203, and the rear end surface 202 encircles a rear end opening 204 of the hose unit body 200. The hose unit body 200 thus has an axially through-going opening 205, which extends between the two end openings203, 204.The axially through-going opening 205 comprises a front cylindrical space 206 that extends from the front end surface 201 and changes into an inner cylindrical space 207 of a smaller diameter than that of the front space 206. At the transition between the front space 206 and the inner space 207, said difference in diameters forms an annular radially extending support surface 208 facing on to the front space 206. The inner space 207 in turn changes into a rear cylindrical space 209. At the transition between the inner space 207 and the rear space 209, the hose unit body 200 has an annular internal radial flange 210, which has a smaller diameter than that of the inner space 207 and thereby forms an annular support surface 211 facing on to the inner space 207. More or less just opposite the internal flange 210, the hose unit body 200 has an external annular recess 213 for a suitable sealing ring 7{ videFig. 1), and just in front of the recess 213 the hose unit body 200 has an outer annular groove 214 for receiving said rotary bearing 4{ videFig. 1). Further, at the rear end surface 202 there is an outer annular recess 215 for an annular plain bearing 8{ videFig. 1). The front portion of the hose unit body 200 that surrounds the front space 206 has three radial bores 216 that are evenly spaced circumferentially and are provided for mounting of roller shafts 9, which extend into the front space 206 in order to carry engagement rollers 10{ videFig. 1). Close to the radially extending annular support surface 208 there are also provided in the front space 206 three radial bores 231 that are evenly spaced circumferentially to be included in a fluid leakage conduit, which will be described below.

The rear portion of the hose unit body 200 that surrounds the rear space 209 has two cam grooves217, 218,and each one of them forms a through opening in the cylinder wall of the hose unit body 200. The cam grooves217, 218are symmetrical in relation to the longitudinal or center axis 219 of the hose unit body 200, which means that the second cam groove 218 is identical to the first cam groove 217 but displaced half a revolution, or 180 degrees, in relation to the first cam groove 217. Each cam groove217, 218is defined by a front cam curve 220 and a rear cam curve 221, which are connected to each other by a front end surface 222 and a rear end surface 223. Each can groove217, 218has a front cam portion 224, where the front cam curve 220 extends substantially straight in the circumferential direction of the hose unit body 200 and where the rear cam curve 221 runs along a concave path, an intermediate cam portion225,where the cam curves220, 221extend substantially parallel to each other in helical paths around the center axis 219, and a rear cam portion 226, where the cam curves220, 221extend substantially parallel to each other in the circumferential direction of the hose unit body 200. The hose unit body 200 is provided with opposite handles 11 to permit rotation of the hose unit body 200 relative to the swivel sleeve 100. The handles 11 may be attached by screws into the material of the hose unit body 200, but in the embodiment shown in Figs. 19, 21 and 23, the two handles 11 are screwed to each other while clamping the hose unit body 200 between them.

The driving plate 400{ videFigs. 8 and 9) is a single integral piece and has a front open,i. e.penetrated, end surface 401 and a rear open,i. e.penetrated, end surface 402, which open end surfaces401, 402are parallel to each other. The front end surface 401 encircles a front end opening 403, and the rear end surface 402 encircles a rear end opening 404 of the driving plate 400. The driving plate 400 thus has an axially through-going opening 405, which extends between the two end openings403, 404and forms a cylindrical space 406. The front end surface 401 has an annular projection 407 for pressing against a sealing ring 12{ videFig. 1), which is arranged to cooperate and form a tight joint with the male member 2 when the coupling device is in its open state. On its outer side, the driving plate 400 has a peripheral and support-forming radial flange 408 that is located at a predetermined small distance from the front end surface 401. The flange 408 has three axial bosses 410 that are evenly spaced circumferentially. The bosses 410 project from that side of the flange 408 that is located closest to the front end surface 401 and end immediately before the plane of the front end surface 401. The free end portion 411 of each boss 410 has a radial recess 412 that may have a concave bottom surface. Between the flange 408 and the rear end surface 402 the driving plate 400 has an external annular recess 414 for a sealing ring 13 that is arranged to cooperate a form a tight joint with the hose unit body 200{ videFig. 1). The inner boundary surface 415 of the space 406 has two opposite axial guide grooves 416 for receiving and guiding the piston stem 500{ videFig. 1). At the front end opening 403 the inner boundary surface 415 has a beveled portion 417, which is arranged to cooperate with the hose unit piston 600 when the female member 1 is in its closed state{ videFig. 1). Also an outer boundary surface 421 at the front end opening 403 has a beveled portion 422, which is arranged to cooperate with a matching beveled surface portion 724 of the male member 2{ videFig. 1 and 14A) on connecting the coupling members 1, 2 to each other.

The piston stem 500{ videFigs. 10 and 11) comprises a first portion 501 that is essentially rectangular, and a second portion 502 that is essentially tubular. The first portion 501 extends between a first front end 503 and a rear second end 504 of portion 501, which ends are generally parallel to each other. The first portion 501 has a thickness that is slightly smaller than the width of the guide groove 416 of the driving plate 400{ videFigs. 8 and 9), which makes an axial movement of the piston stem 500 relative to the driving plate 400 practicable. At its first end 503, the first portion 501 has a centrally located through bore 505, which is arranged to be included in a joint between the piston stem 500 and the hose unit piston 600. The second portion 502 is firmly fixed, preferably by welding, to the second end 504 of the first portion 501 and has a through axial channel or bore 506 that is arranged to form a seat for a cam roller shaft. The cam roller shaft in turn is arranged to carry cam rollers 14 at its ends{ videFigs. 20 and 22, where however only one of the cam rollers is shown), which cam rollers 14 are arranged to run in said cam grooves217, 218while cooperating with said cam surfaces220, 221{ videFigs. 4 and 5).

The hose unit piston 600 has a substantially rotation symmetrical shape and comprises a front piston body 601 and a rear connection portion 602. The connection portion 602 has an axial recess or slot 603 for receiving the forward end 503 of the first portion 501 of the piston stem 500. The connection portion 602 also has a transverse through bore 604, which is of the same diameter as the bore 505 in the piston stem 500 for a locking pin 15{ videFig. 1) for connecting the piston stem 500 to the hose unit piston 600. The piston body 601 has a peripheral groove 605 for a piston sealing ring 16{ videFig. 1) that is arranged to form a tight joint with the beveled portion 417 of the driving plate 400 when the female member 1 is in its closed state.

The rear portion of the driving plate 400 has an external substantially rotation symmetrical surface 418{ videFig. 8), which has a diameter that is slightly smaller than the inner diameter of the inner space 207 of the hose unit body 200{ videFig. 4), so that the driving plate 400 with its rear end surface 402 may be inserted with a sliding fit into the inner space 207 of the hose unit body 200 via the front end opening 203 of the hose unit body 200 and be locked in this position by the cooperation of the piston stem 500 and the hose unit piston 600 with the cam grooves217and218.A compression spring,e. g.a wave spring 17{ videFig. 1), which is provided between the support surface 211 of the hose unit body 200{ videFig. 4) and the rear end surface 402 of the driving plate400 { videFig. 8), operates the driving plate 400 with an axial force in relation to the hose unit body 200 and ensures that the hose unit piston 600 forms a tight joint with the driving plate 400 when the driving plate 400, the piston stem 500, and the hose unit piston 600 are locked axially relative the cam rollers 14{ videFig. 1) when the female member 1 is in its closed state. The sealing ring 13 ensures that a tight joint is formed between the surface 418 of the driving plate 400 and an opposite inner rotation symmetrical surface 227 of the inner space 207 of the hose unit body 200{ videFig. 4A). This arrangement permits the hose unit body 200 to be rotated around its center axis 3 in relation to the driving plate 400.

The rear portion of the hose unit body 200 has an outer diameter that is slightly smaller than the inner diameter of the inner space 107 of the swivel sleeve 100, so that the hose unit body 200 with attached driving plate 400, piston stem 500, and hose unit piston 600 can be inserted into the inner space 107 and be fixed in axial direction in this position by means of the swivel ring 300, in that the swivel ring 300 forms a threaded joint with the swivel sleeve 100 as shown in Fig. 1. The threaded joint fixes the swivel ring 300 and the swivel sleeve 100 axially in relation to the rotary bearing 4 and thereby also in relation to the hose unit body 200. However, through the rotary bearing 4 and the plain bearing 8, the hose unit body 200 can be rotated in relation to the swivel sleeve 100 and the swivel ring 300.

Consequently, the rear space 108 of the swivel sleeve 100, the rear space 209 of the hose unit body 200, the opening 405 of the driving plate 400, and the front space 206 of the body 200 together form a through put flow conduit for the fluid, in which flow conduit the hose unit piston 600 is arranged to form an openable and closeable valve in the female member 1.

The tank unit body 700{ videFigs. 14A, 14B, 15 and 16) is a single integral cylindrical piece. It has a front open,i. e.penetrated, end surface 701 and a rear open,i. e.penetrated, end surface 702, which open end surfaces 701, 702 are parallel to each other and define a front end opening 703 and a rear end opening 704, respectively. The tank unit body 700 thus has an axially through-going opening 706, which extends between the two end openings 703, 704 and comprises a front space 707 an inner space 708, and a rear space 709. The front space 707 has a rotation symmetrical conical surface 711 for cooperation with the tank unit piston 800. The rear space 709 has a slightly conical surface 712 having a screw-thread 713 for forming a threaded joint with a tank connection. An annular groove 714 having opposite side walls 717, 725 is formed on the outside of the tank unit body 700 at a predetermined small distance from the front end surface 701 and with a predetermined depth, whereby a radial flange 715 is formed between the front end surface 701 and the annular groove 714. This flange 715 has three circumferentially evenly spaced axially through-going slots 716 running between the front end surface 701 and the groove 714, said slots 716 forming axial passages for the engagement rollers 10 of the female member. The slot 716 also has a predetermined width corresponding to the width of the bosses 410 of the female member 1 so the bosses 410 of the driving plate 400 just fit into the slot 716 upon connection of the coupling members 1, 2, the tank unit body 700 and the driving plate 400 thereby being rotationally fixed in relation to each other. The flange 715 has a first support surface 717 which is partitioned by the slots 716 and face away from the end opening 703 and is arranged to cooperate with the engagement rollers 10 of the female member 1. Opposite the support surface 717, on the opposite side of the groove 714, there is a second surface 725 that faces against the end opening 703. At each slot 716, the flange 715 has a recess 718 of a predetermined depth in the support surfaces 717 which may be in the interval of about 1 to 5 mm, preferably about 2-3 mm, and of a shape and a radius of curvature that correspond to the shape and radius of curvature of the engagement rollers 10. The function of these recesses 718 will be described more in detail below. Between the sealing surface 711 and the end opening 703 there is an annular recess 719 for a sealing ring 12{ videFig. 1), which faces on to the end opening 703 and is arranged to receive the axially projecting end portion 407 of the driving plate 400 of the female member 1 in order to form a tight seal. Between the inner space 706 and the rear space 709 the tank unit body 700 has a piston guide seat 720{ videalso Figs. 1 and 16) formed by three equiangularly spaced lugs, which are provided to carry a piston guide 19{ videFig. 30) for guiding the tank unit piston 800.

On the opposite side of the groove 714 in relation to the flange 715, the tank unit body 700 has a cylindrical exterior surface portion 705, provided with three identical pairs of comparatively shallow recesses 722, 723; 722', 723'; and 722", 723"{ videFig. 14B, 15, and 16). When the bosses 410 of the driving plate 400 are inserted through the slots 716 in the flange 715 of the tank unit body 700 but before the driving plate 400 is rotated in relation to the tank unit body 700, the cylindrical exterior surface portion 705 has a non-recessed surface 721, 721' or 721" in axial direction right behind each flange slot 716. The recesses 723, 723', 723" of the first stopping means 723 are located at an angle of rotation of about 12 °from it associated non-recessed surface 721, 721', 721" while the recesses 722, 722', 722" of the second stopping means 722 are located at an angle of rotation of about 100 ° from its associated non-recessed surface 721, 721' or 721".The recesses (722, 722', 722", 723, 723', 723") of the stopping means 722, 723 comprise a locking surface 726, 727 which extends inwards from the exterior cylindrical surface portion 705 in substantially radial direction. The locking surface 726, 727 is arranged to block a disengaging rotary movement of the first coupling member 1. When the end 30 of the locking member has entered into the recess, the force from the spring 35 urges the end towards the bottom of the recess and the locking surface 726, 727 forms a step which prohibits continued rotation. The locking end is lifted by pivoting the handle 31 inwards and a continued rotation is thereby possible. The recesses 722, 722', 722" of the second stopping means have steep sides in the circumferential direction of the cylindrical exterior surface portion 705, but the other recesses 723, 723' and 723" of the first stopping means 723 have a proximate steep side in relation to its associated non-recessed surface 721, 721' or 721" and no opposite distal side. Instead the bottom of each recess 723, 723' and 723" is extended in tangential direction to the cylindrical exterior surface portion 705 of the tank unit body 700 until the bottom bridges the exterior surface portion 705.

The recesses 722, 722' and 722" and 723, 723' and 723" are preferable made by milling and extend over the axial width of the cylindrical exterior surface portion 705. Preferably, they have such a length that even when the coupling members are connected to each other, an end portion of each recess is visible in front of the front end 26 of the female member 1. Between the groove 714 and the cylindrical exterior surface portion 705, there is a substantially conical surface portion 728 to facilitate when the locking end 30 of the lever 22 is brought to one of the non-recessed surfaces 721, 721' or 721" when connecting the female member 1 and the male member 2 to each other. Upon a visual external inspection of the coupling, the actual position of the pivotal lever 22 handle end 31, located closer to or farther away from the hose unit body 200, give a clear indication about whether the coupling is in its second or third state or even somewhere in between. If desired, the tank unit body 700 may be provided with axial arrows pointing at each one of the non-recessed surface 721, 721' or 721",{ videFigs. 14B and 15). These arrows, together with the visible end portions of the recesses give yet another indication of whether the coupling is in its second or third state or even somewhere in between.

The tank unit piston 800{ videFigs. 17 and 18) comprises a piston rod 801 and a piston disk 802 that is fixed to one end of the piston rod 801 as shown in Figs. 17 and 18. The piston disk 802 has a sealing face with a circumferential groove 803 for a piston sealing ring 18{ videFig. 1) that is arranged to form a tight joint with the conical surface 711 of the tank unit body 700 when the male member 2 is in its closed state.

As shown in Fig. 1, 14A, 16 and 20, a piston seat 720 is provided for carrying the piston guide 19{ videFig. 30), which has three radial spokes that are evenly spaced and extend radially from a hub for receiving the piston rod 801 of the tank unit piston 800. The piston guide 19 in turn carries a support cup 20 that has an axial opening for the piston rod 801. A compression spring 21 is provided between the support cup 20 and the piston disk 802 to expose the tank unit piston 800 to an axially pressing force, which endeavors to maintain the contact of the tank unit piston 800 with the conical surface 711 of the tank unit body 700 and thereby maintain the male member 2 in its closed state.

The through-going opening 706 of the tank unit body 700 thus forms a throughflow conduit for the fluid, in which flow conduit the tank unit piston 800 is arranged to form an openable and closeable valve in the male member 2.

The female member 1 comprises a locking device 23. In the embodiment described herein the locking device 23 is mounted outside of the hose unit body 200 (vide Figs. 1, 4A, 4B, and 5) at the front open end surface 201. The locking device 23 shown in Figs. 1, 28, and 29, includes a pivotal manually maneuverable locking lever 22 that has a locking end 30, which extends through an opening 229 in the hose unit body 200, and a handle end 31 that extends along the outside of the hose unit body 200. The locking end 30 of the lever 22 is arranged to enter into a locked position in direct contact with the tank unit body 700 automatically at the establishing of the fluid connection. The locking lever 22 has to be brought manually from its locked position to an open position before the coupling device can be brought from a state where the flow conduits through the coupling device are presumed to be closed, but any possible fluid leakage can be detected, to a state where the coupling members 1, 2 are disengaged from each other.

The lever 22 is pivoted on a transverse pivot shaft 33 mounted in a cradle 32 that is fixed to the hose unit body 200 by a screw 34 screwed into a threaded bore 230. A leaf spring 35 has one end clamped to the hose unit body 200 by the screw 34 and has its other end pressing against the underside of the handle end 31 of the lever 22 in order to press the locking end 30 through the opening 229 against the tank unit body 700. Thus, the spring 35 operates the lever 22 with a force that strives to move the locking end 30 of lever 22 radially inward, in the direction of the center axis 3 of the female member 1, and by pressing down the handle end 31 of lever 22 the operator can overcome the spring force and move the locking end 30 outward, away from its contact with the tank unit body 800.

The function of the coupling device will be described in more detail below with reference to Figs. 1 and 19-27. The starting state is that the female member 1 and the male member 2 are disconnected from each other and that the members 1 and 2 are in their closed states as shown in Fig. 1.

When the female member 1 is in its closed state, the engagement rollers 10 of the hose unit body 200 are located just in front of the bosses 410 of the driving plate 400 as shown in Fig. 19, and the cam rollers 14 shown in Figs. 20 and 22 are located in the rear cam portions 226 of the cam grooves217, 218in the contact with the rear support surfaces 223{ videFigs. 4A and 4B).

When the male member 2 is in its closed state, the tank unit piston 800 is in sealing contact with the tank unit body 700 as shown in Fig. 1.

At the start of the coupling operation, the operator moves the female member 1 so that its front end 26 faces on to the front end 27 of the male member 2 as shown in Fig. 1. With the female member 1 in its closed state, the operator then moves the female member 1 in axial direction toward and against the male member2tso that the engagement rollers 10 of the female member 1 pass through the slots 716 of the tank unit body 700 and into the groove 714, while the bosses 410( videFigs. 8 and 9) simultaneously pass into the slots 716. During this axial movement, the front end surface 401 (vide Fig. 8) of the driving plate 400 is brought into contact with the front end surface 701 of the body 700, and the hose unit piston 600 is brought into contact with the tank unit piston 800 as shown in Fig. 20 and in more detail in Fig. 25. Further, the locking end 30 of spring-loaded lever 22 will pass through one of the slots 716 or pass above the flange 715. The locking end 30 will thereafter come to bear against the non-recessed part 721 of the cylindrical exterior surface portion 705 of the tank unit body 700.

By turning the handles 11 around the common axis 3 of the female member 1 and male member 2, the operator then causes the hose unit body 200 to rotate in relation to the driving plate 400 in a first engaging rotary movement, where the engagement rollers 10 are made to leave their positions ahead of the bosses 410, which in the direction of rotation are fixed in the slots 716, and be brought in behind the flange 715, where they first are made to cooperate with the recesses 718 (vide Fig. 14B) and then with the support surfaces 717 while a bayonet type mount is formed between the female member 1 and the male member 2. Under exposure of an axial force generated by the cooperation of the engagement rollers 10 with the support surface 717, the end surface 401 and the sealing ring 12 arranged in the recess 719 of the tank unit 700 are made to cooperate fluid-tightly with each other.

During the initial phase of the engaging rotary movement, the locking end 30 of the spring-loaded lever 22 will be forced down from the non-recessed surface 721 into the bordering recess 723( videFig. 16) as shown in Fig. 21, at the same time as the engagement rollers 10 pass the recesses 718. In the direction toward the non-recessed surface 721, the recess 723 is limited by a substantially radial face. When the locking lever end 30 has been forced down in the recess 723, the cooperation of the locking lever end 30 with said face( videFig. 16) prevents a returning and loosening rotation of the hose unit body 200 in relation to the driving plate 400.

In the course of continued rotary movement of the hose unit body 200, the locking lever end 30 enters the recess 722, and the cam rollers 14, which are shown in Figs. 20 and 22 follow the cam grooves 217, 218, enter the intermediate cam portion 225, whereby the rear cam curves 221 of the cam grooves 217, 218 will transfer a portion of the torsion force applied by the operator on the handles 11 via the hose unit body 200 and the piston stem 500 to an axial forward directed pressing force on the hose unit piston 600. Under the action of this pressing force forward, the hose unit piston 600 is forced to move relative the driving plate 400 in the direction of the male member 2. Consequently, during this movement, a fluid passage between the hose unit piston 600 and the driving plate 400 will open, whereby the flow conduit of the female member 1 opens. Simultaneously, the hose unit piston 600 will act on the tank unit piston 800 with an axial load, which, on overcoming the load from the compression spring 21, makes also a fluid passage between the tank unit piston 800 and the tank unit body 700 open, whereby also the flow conduit through the male member 2 opens. Thus, in this state, fluid can pass through the coupling device. The fluid passage opening movement continues until the cam rollers 14, by the rotary movement, contacts the front end surfaces 222 of the cam grooves 217, 218, where the coupling device is in its maximum open state as shown in Fig. 24 and more in detail in Fig. 27.

To close the fluid passage between the female member 1 and the male member 2 and sever the connection, the operator for a moment presses down the handle end 31 of the lever 22 to free the locking end 30 from its engagement in the recess 722 and rotates the hose unit body 200 in a second disengaging rotary movement, that is opposite to the first engaging movement, whereby the cam rollers 14 initially are moved from the front cam portions 224 to the intermediate cam portions 225 1 and whereby the front cam curves 220 of the cam grooves 217, 218 are made to act on the cam rollers 14 in a manner such that the applied torque is transferred to an axial load directed backward on the hose unit piston 600 via the piston stem 500. This backward pressing load forces the hose unit piston 600 to move in relation to the driving plate 400 in a direction away from the male member 2. Consequently, during this movement, the fluid passage between the hose unit piston 600 and the driving plate 400 will close, and under influence from the force of the compression spring 21 the fluid passage between the tank unit piston 800 and the tank unit body 700 will close simultaneously, whereby the flow conduit 205, 405 through the female member 1 and the flow conduit 706 through the male member 2 closes.

This second rotary movement continues until the cam rollers 14 enter the rear cam portions 226 of the cam grooves 217, 218, the engagement roller 10 enter the third step recesses 718 in the flange 715, and the locking end 30 of the lever 22 is brought into contact with the locking surface 726 of recess 723, whereby a continued rotary movement is prevented by the cooperation of the locking end 30 of the lever 22 with said locking surface. In this state, the hose unit piston 600 still is to form a fluid-tight joint with the driving plate 400, and in the same way the tank unit piston 800 still is to form a fluid-tight joint with the body 700. However, it may happen that any of these joints do not fit entirely close. As an example, some foreign matter may have ended up between the hose unit piston 600 and the driving plate 400 or between the tank unit piston 800 and the body 700, or any of the piston sealing rings 16 and 18 may be damaged. In such cases it is desirable that the connection between the female member 1 and the male member 2 is maintained, as a disengagement of the coupling may involve an uncontrolled fluid leakage to the surroundings.

As described above, the third step recesses 718 have a predetermined depth, preferably in the range of 1 - 5 mm although the skilled person realizes that the depth can be adapted to the actual conditions in order to provide a reliable leakage means. When the engagement rollers 10 are in the third step recesses 718, a clearance 25 will consequently be formed between the annular projection 407 of the driving plate front end surface 401 and the sealing ring 12 in recess 719( videFigs. 1, 8, 14A, and 26) and thus between the driving plate 400 and the tank unit body 700 as shown in Fig. 26, which clearance 25 has a width that corresponds to the depth of the third step recesses 718. This in turn means that possible fluid leaking from the joint between the hose unit piston 600 and the driving plate 400 or from the joint between the tank unit piston 800 and the tank unit body 700 will flow out of the clearance 25 and further out through a space 28 between the hose unit body 200 and the tank unit body 700( videFig. 26), and finally out through the bores 231 between the protective ring 6 and the tank unit body700 ( videFigs. 4A and 4B), which flow passage consequently forms a leakage channel for the fluid, e.g. a gas. This makes it possible for the operator to detect a possible gas leakage before the joint between the female member 1 and the male member 2 is finally severed. The position when the engagement rollers 10 press on the third step recesses 718 forms a fluid/gas leakage indicating position in the coupling device, and the cooperation of the locking end 30 of the lever 22 with the locking surface 726 of recess 723 guarantees that the joint severing rotary movement cannot automatically pass that gas leakage indicating position. The skilled person also understands that an embodiment where the groove 714 is given a gradually increasing width in connection to the slot 716 will result in a similar mechanism for creating the clearance 25 in the third state.

When the operator has made sure that there is no fluid/gas leakage, he again presses down the handle end 31 of the locking lever 22, whereby the locking end 30 of lever 22 can go free from the locking surface 726 of the recess 723. The operator's joint severing rotary movement of the hose unit body 200 in relation to the male member 2 can then continue until the engagement rollers 10 get straight in front of the bosses 410, whereby the bayonet type connection between the female member 1 and the male member 2 comes to an end, whereupon the operator can sever the joint between the female member 1 and the male member 2 by removing the female member 1 from the male member 2 in axial direction.

Consequently, the coupling device comprises a first closed state, where the coupling members 1, 2 are disengaged from each other,i. e.the pistons600, 800are arranged to prevent fluid passage through the flow conduits205, 406and706of the coupling members 1, 2, respectively, and a second closed state, where the valves600, 800are arranged to permit fluid passage through the flow conduits205,706. The coupling device in addition has a third coupling state, where the valves600, 800are arranged to prevent fluid passage through the flow conduits205, 406and 706, but where the coupling members 1, 2 are connected to each other to form a fluid leakage channel 25, 28, 231, which is arranged to control and in a controlled manner guide possible fluid leakage, leaking from any of the coupling members 1, 2 out from the coupling device, so as to permit a simple detection of said possible fluid leakage while the coupling members 1, 2 still are connected to each other. If the operator detects a leakage, he can easily bring the coupling device back to the second coupling state, so that the fluid leakage to the surroundings will be stopped.

According to another aspect of the invention the annular groove 714 in the tank unit body 700 comprises at least one bulge 724, but preferably there are arranged three bulges 724( videFig. 31-32). The bulge 724 is arranged on the second surface 725 in connection with the slot 716 in the flange 715. The bulge 724 is disposed a little offset, towards the center of the slot 716, in comparison with the recess 718 in the support surface 717. The bulge 724 co-acts with the recess 718 and creates a deflection of the groove 714 toward the slot 716. This may be helpful when disengaging the coupling members 1, 2 from each other since the bulge 724 and the curvature of the groove 714 helps to push the engagement rollers10out of the groove 714.

The invention has been described above with reference to a specific embodiment. However, as is easily realized, other embodiments are possible within the scope of the invention.

For example, it is not necessary for the flange 408 to have three axial bosses410although the skilled person understands that only one or two bosses410gives fewer supporting points and less stable connection.

The third coupling state may be realized in many different ways within the scope of the invention. As an example, the third coupling state may be positioned some distance ahead of the first stage where the coupling members can be disconnected. The recesses may be given an increased extension in circumferential direction as well as depth in to the support surface compared to the embodiment described herein. One example of another type of coupling device that could be provided with the third coupling state is shown in SE 507753 C2.

The inventive concept may also be applied to a coupling device having external cam curves on the male member. Couplings of that kind doesn't have the separate annular groove 714 that co-act with the engagement rollers 10. Instead, connection devices such as cam rollers are introduced into the cam curve which front cam portion 224 is drawn in substantially circumferential direction thereby providing a bayonet type mount between the coupling members and wherein continued rotary movement results in an opening of the valve in the coupling in a manner known per se. The third step may be obtained by arranging the recess 723 in the external cylindrical surface 705 and the recess 718 in the front cam curve 220 in connection with the front cam portion 224 of the cam curve. The second step may be obtained by arranging the recess 722 in the external cylindrical surface 705 in connection with the rear cam portion 226.

It is also realized that the coupling device does not necessarily have to be equipped with a locking device corresponding to the locking device 23 described above, but that such a locking device is preferred, as it guarantees that the coupling device cannot be brought directly from the second coupling state to the first coupling state without an intermediate stop in the third coupling state. In addition, it is understood that such a locking device can be realized in many different ways, for example the locking device may be arranged to act in axial direction in a manner known per se.

The tank unit body 700 in the described example is provided with three identical pairs of comparatively shallow recesses 722, 723; 722', 723'; and 722", 723" forming part of the first and second stopping means. However, the second stopping means is not required in order to obtain the main object of the invention. Thus, the tank unit body 700 may be provided with the recess of the first stopping means only.

Claims

1. A coupling device of bayonet mount type for establishing a fluid connection between a first container and a second container, said coupling device including a first coupling member (1) for connection to the first container and a second coupling member (2) for connection to the second container, - said first coupling member (1) comprising: - a first flow conduit (205) for the fluid; and - a first valve (600 - 605) located in the first flow conduit (205, 405) and arranged to permit fluid passage through the first flow conduit (205, 405) when the first coupling member (1) is fluid-tightly connected to the second coupling member (2); and - said second coupling member (2) comprising: - a second flow conduit (706) for the fluid; and - a second valve (800 - 802) located in the second flow conduit (706) and arranged to permit fluid passage through the second flow conduit (706) when the second coupling member (2) is fluid-tightly connected to the first coupling member (1); said coupling device having: - a first coupling state, where the coupling members (1, 2) are disengaged from each other and where the valves (600, 800) are arranged to prevent fluid passage through the flow conduits (205, 405, 706); as well as - a second coupling state, where the coupling members (1, 2) are fluid-tightly coupled to each other and where the valves (600 - 605, 800 - 802) are arranged to permit fluid passage through the flow conduits (205, 405 , 706) to permit fluid communication between the containers; and - a third coupling state between said first coupling state and said second coupling state, in which third state a fluid leakage conduit (25, 28, 231) is arranged to conduct possible fluid leakage leaking from any of the first valve (600 - 605) and/or second valve (800 - 802) so that said possible fluid leakage can be detected before disengaging the coupling members (1, 2) from each other; said coupling device further including: a locking device (23), having a locking end (30) and a handle end (31), said locking end (30) being arranged to automatically enter into co-active engagement with a first rotation stopping means (723) of the second coupling member (2) in the third coupling state which prevents the coupling members (1,2) from being moved from the second coupling state to the first coupling state without an intermediate stop in the third coupling state, said locking end (30) further being arranged to be manually released from said co-active engagement via said handle (31) characterized in that a force exerting means (35) is arranged at the outside of said first coupling member (1) for provision of a force on said handle (31) for automatically position said locking end (31) in said co-active engagement with said rotation stopping means (723). 2. A coupling device as claimed in claim 1, characterized in that said locking device (23) comprises a pivotal manually maneuverable locking lever (22). 3. A coupling device as claimed in claims 1 or 2, characterized in that said first rotation stopping means (723) comprises at least one recess (723, 723', 723") arranged at an exterior cylindrical surface portion (705) of the second coupling member (2), which recess is adapted to receive the locking end (30) of the locking device (32). 4. A coupling device as claimed in claim 3, characterized in that said exterior cylindrical surface portion (705) comprises at least one second rotation stopping means (722) which is provided with at least one recess (722, 722', 722"), said second rotation stopping means (722) being circumferentially spaced from said first rotation stopping means (723) a distance corresponding to the relative rotary movement of the coupling members (1, 2) between said second coupling state and said third coupling state. 5. A coupling device as claimed in claim 3 or 4, characterized in that the recesses (722, 722', 722", 723, 723', 723") comprises a locking surface (726, 727) extending inwards from the exterior cylindrical surface portion (705) in substantially radial direction, said locking surface (726, 727) being arranged to block a disengaging rotary movement of the first coupling member (1). 6. A coupling device as claimed in any of claims 3-5, wherein the at least one recess (722, 723; 722', 723"; 722', 723") has an extension in axial direction along the second coupling member (2), that a part of the recess (722, 723; 722', 723"; 722', 723") is visible when the coupling members (1, 2) are connected to each other. 7. A coupling device as claimed in claims 1 characterized in that said force exerting means (35) is a leaf spring (35) 8. A coupling device as claimed in any of claims 1-7, characterized in that the first coupling member (1) comprises: - a driving plate (400), which has an axially through-going opening (405) that forms a front portion of said first flow conduit (205, 405), as well as a front end surface (401) that surrounds a front end opening (403) of said first flow conduit (205, 405); - a predetermined plurality of engagement rollers (10) evenly distributed circumferentially for cooperation with said second coupling member (2); and the second coupling member (2) comprises: - a tank unit body (700) having an axially through-going opening (706) that forms said second flow conduit, as well as a front end surface (701) that surrounds a front end opening (703) of said second flow conduit (706), said tank unit body (700) further having a support surface (719), which faces on to the front opening (703), and an annular groove (714), which is provided in an outside of the tank unit body (700) at a predetermined small distance from the front end surface (701) of the body (700), so that a radial flange (715) is formed between the front end surface (701) of the tank unit body (700) and the groove (714), said flange (715) having a predetermined plurality of circumferentially evenly distributed axially through-going flange slots (716) for receiving the engagement rollers (10) of the first coupling member (1) at a mutually axial movement between the coupling members (1, 2), between which flange slots (716) the flange (715) has support surfaces (717), which face away from the front end surface (701) of the tank unit body (700) and are arranged to cooperate with the engagement rollers (10) at a mutual first rotary movement between the coupling members (1, 2) while forming a bayonet mount between the coupling members (1, 2), as well as a predetermined plurality of circumferentially evenly distributed third step recesses (718) that are located in the support surfaces (717) for receiving the engagement rollers (10) during part of said first rotary movement, wherein in said second coupling state the engagement rollers (10) are arranged to cooperate with the support surfaces (717) in order to make the front end surface (401) of the driving plate (400) and the support surface (719) of the tank unit body (700) cooperate fluid-tightly with each other under influence from a force generated by the cooperation of the engagement rollers (10) with the support surfaces (717); and wherein the engagement rollers (10), when being in said third coupling state, are arranged to cooperate with the third state recesses (718) while forming a clearance (25) between the driving plate front end surface (401) and the body support surface (719), which clearance (25) forms a portion of said fluid leakage conduit (25, 28, 231). 9. A coupling device as claimed in claim 8, characterized in that the third state recess (718) has a shape and a radius of curvature that essentially correspond to the shape and the radius of curvature of the engagement rollers (10) and preferably has a depth in the interval of 1-5 mm. 10. A coupling device as claimed in any of claims 8-9, characterized in that the third state recesses (718) are located adjacent the flange slots (716). 11. A coupling device as claimed in claim 5, characterized in that the locking surface (726) of the recess (723, 723', 723") of the first locking means (723) is located in axial alignment with the flange slots (716), a circumferential distance (d) between a first side wall (716') of the flange slots (716) and an imaginary extension of said locking surface (726) being smaller than a diameter of the engagement rollers (10). 12. A coupling device as claimed in any one of claims 7-9, characterized in that the first coupling member (1) comprises a hose unit piston (600) arranged in front end opening (403) of the first coupling member (1) to form said first valve, and in that the second coupling member (2) comprises a tank unit piston (800) that is arranged in the front end opening (703) of the tank unit body (700) to form said second valve.

1. Kopplingsanordning av bajonettfattningsslag för upprättande av en vätskeförbindelse mellan en första behållare och en andra behållare, varvid kopplingsanordningen innefattar en första kopplingsdel (1) för förbindelse med den första behållaren och en andra kopplingsdel (2) för förbindelse med den andra behållaren, den första kopplingsdelen (1) innefattar: -en första flödesledning (205) för vätskan; och -en första ventil (600-605) placerad i den första flödesledningen (205, 405) och anordnad att tillåta vätskepassage genom den första flödesledningen (205, 405) när den första kopplingsdelen (1) är vätsketätt förbunden med den andra kopplingsdelen (2); och den andra kopplingsdelen (2) innefattar: -en andra flödesledning (706) för vätskan; och -en andra ventil (800-802) placerad i den andra flödesledningen (706) och anordnad att tillåta vätskepassage genom den andra flödesledningen (706) när den andra kopplingsdelen (2) är vätsketätt förbunden med den första kopplingsdelen (1); varvid kopplingsanordningen har: -ett första kopplingstillstånd, där kopplingsdelarna (1, 2) är frigjorda från varandra och där ventilerna (600, 800) är anordnade att förhindra vätskepassage genom flödesledningarna (205, 405, 706); så väl som -ett andra kopplingstillstånd, där kopplingsdelarna (1,2) är vätsketätt kopplade till varandra och där ventilerna (600-605, 800-802) är anordnade att tillåta vätskepassage genom flödesledningarna (205, 405, 706) för att tillåta vätskekommunikation mellan behållarna; och -ett tredje kopplingstillstånd mellan det första kopplingstillståndet och det andra kopplingstillståndet, i vilket tredje tillstånd en vätskeläckageledning (25, 28, 231) är anordnad att leda möjligt vätskeläckage läckande från någon av den första ventilen (600-605) och/eller andra ventilen (800-802) så att det möjliga vätskeläckaget kan detekteras före frånkoppling av kopplingsdelarna (1, 2) från varandra; vidare innefattar kopplingsanordningen: en låsanordning (23), med en låsände (30) och en handtagsände (31), varvid låsänden (30) är anordnad att automatiskt träda in i samaktivt ingrepp med ett första vridstoppande organ (723) för den andra kopplingsdelen (2) i det tredje kopplingstillståndet vilket hindrar kopplingsdelarna (1, 2) från att förflytta sig från det andra kopplingstillståndet till det första kopplingstillståndet utan ett mellanliggande stopp i det tredje tillståndet, låsänden (30) är vidare anordnad att manuellt frigöras från det samaktiva ingreppet via handtaget (31), kännetecknad av att ett kraftutövande organ (35) är anordnat på utsidan av den första kopplingsdelen (1) för tillhandahållande av en kraft på handtaget (31) för automatiskt positionering av låsänden (31) i det samaktiva ingreppet med det vridstoppande organet (723).

2. Kopplingsanordning i enlighet med krav 1, kännetecknad av att låsanordningen (23) innefattar en vridbar manuellt manövrerbar låshävarm (22).

3. Kopplingsanordning i enlighet med krav 1 eller 2, kännetecknad av att det första vridstoppande organet (723) innefattar åtminstone ett urtag (723, 723', 723") anordnat vid en yttre cylindrisk ytdel (705) på den andra kopplingsdelen (2), vilket urtag är anpassat att ta emot låsänden (30) på låsanordningen (32).

4. Kopplingsanordning i enlighet med krav 3, kännetecknad av att den yttre cylindriska ytdelen (705) innefattar åtminstone ett andra vridstoppande organ (722) vilket är försett med åtminstone ett urtag (722, 722', 722"), det andra vridstoppande organet (722) är omkringlöpande åtskilt från det första vridstoppande organet (723) ett avstånd motsvarande den relativa vridrörelsen för kopplingsdelarna (1, 2) mellan det andra kopplingstillståndet och det tredje kopplingstillståndet.

5. Kopplingsanordning i enlighet med krav 3 eller 4, kännetecknad av att urtagen (722, 722', 722", 723, 723', 723") innefattar en låsyta (726, 727) sig sträckande inåt från den yttre cylindriska ytdelen (705) i väsentligen radiell riktning, låsytan (726, 727) är anordnad att blockera en frånkopplande vridrörelse för den första kopplingsdelen (1).

6. Kopplingsanordningen i enlighet med något av kraven 3-5, vari åtminstone ett urtag (722, 723; 722', 723"; 722', 723") har en förlängning i axial riktning längs den andra kopplingsdelen (2), att en del av urtaget (722, 723; 722', 723", 722', 723") är synlig när kopplingsdelarna (1, 2) är förbundna med varandra.

7. Kopplingsanordning i enlighet med krav 1, kännetecknad av att det kraftutövande organet (35) är en bladfjäder (35).

8. Kopplingsanordning i enlighet med något av kraven 1-7, kännetecknad av att den första kopplingsdelen (1) innefattar: -en medbringarskiva (400), vilken har en axiellt genomgående öppning (405) som bildar ett främre parti på den första flödesledningen (205, 405), så väl som en främre ändyta (401) som omger en främre ändöppning (403) på den första flödesledningen (205, 405); -ett förbestämt flertal ingreppsrullar (10) jämt fördelade omkringlöpande för samverkan med den andra kopplingsdelen (2); och den andra kopplingsdelen (2) innefattar: -en tankenhetskropp (700) med en axiellt genomgående öppning (706) som bildar den andra flödesledningen, så väl som en främre ändyta (701) som omger en främre ändöppning (703) på den andra flödesledningen (706), tankenhetskroppen (700) har vidare en stödyta (719), vilken vetter mot den främre öppningen (703), och ett ringformigt spår (714), vilket är anordnat i en utsida på tankenhetskroppen (700) på ett förbestämt litet avstånd från den främre ändytan (701) på kroppen (700) , så att en radiell fräns (715) är bildad mellan den främre ändytan (701) på tankenhetskroppen (700) och spåret (714), flänsen (715) har ett förbestämt flertal omkringlöpande jämnt distribuerade axiellt genomgående flänsskåror (716) för mottagande av ingreppsrullarna (10) på den första kopplingsdelen (1) vid en ömsesidig axialrörelse mellan kopplingsdelarna (1, 2), mellan vilka flänsskåror (716) flänsen (715) har stödytor (717), vilka vetter bort från den främre ändytan (701) på tankenhetskroppen (700) och är anordnade att samverka med ingreppsrullarna (10) vid en ömsesidig första vridrörelse mellan kopplingsdelarna (1, 2) medan bildande en bajonettkoppling mellan kopplingsdelarna (1, 2), så väl som ett förbestämt flertal omkringlöpande jämt fördelade tredjestegsurtag (718) som är placerade i stödytorna (717) för mottagande av ingreppsrullarna (10) under del av den första vridrörelsen, vari i det andra kopplingstillståndet är ingreppsrullarna (10) anordnade att samverka med stödytorna (717) för att få den främre ändytan (401) på medbringarskivan (400) och stödytan (719) på tankenhetskroppen (700) att samverka vätsketätt med varandra under inverkan från en kraft skapad genom samverkan av ingreppsrullarna (10) med stödytorna (717); och vari ingreppsrullarna (10), när i det tredje kopplingstillståndet, är anordnade att samverka med det tredje tillståndets urtag (718) medan bildande ett avstånd mellan medbringarplattans främre ändyta (401) och kroppstödytan (719), vilket avstånd (25) bildar en del av vätskeläckageledningen (25, 28, 231).

9. Kopplingsanordning i enlighet med krav 8, kännetecknad av att det tredje tillståndets urtag (718) har en form och en krökningsradie som väsentligen motsvarar formen och krökningsradien för ingreppsrullarna (10) och har företrädesvis ett djup i intervallet 1-5mm.

10. Kopplingsanordning i enlighet med något av kraven 8-9, kännetecknad av att det tredje tillståndets urtag (718) är placerade angränsande flänsskårorna (716).

11. Kopplingsanordning i enlighet med krav 5, kännetecknad av att låsytan (726) för urtagen (723, 723', 723") för det första låsorganet (723) är placerad i axialinriktning med flänsskårorna (716), ett omkringlöpande avstånd (d) mellan en första sidovägg (716') på flänsskårorna (716) och en imaginär förlängning av låsytan (726) är mindre än en diameter för ingreppsrullarna (10).

12. Kopplingsanordning i enlighet med något av kraven 7-9, kännetecknad av att den första kopplingsdelen (1) innefattar en slangenhetskolv (600) anordnad i en främre ändöppning (403) på den första kopplingsdelen (1) för att bilda den första ventilen, och av att den andra kopplingsdelen (2) innefattar en tankenhetskolv (800) som är anordnad i den främre ändöppningen (703) på tankenhetskroppen (700) för att bilda den andra ventilen.