DE10030030C1 - Bayonet connection, to join two pipe parts, has holder pipe part with radial recesses leading to axially closed chambers and insertion pipe part with cams to fit in chambers when rotated - Google Patents

Abstract

The connection joins a holder pipe part (20) and an insertion pipe part (30). The insertion pipe part is surrounded by a cam ring (40) having at least one radially projecting cam. The holder pipe part has an inner profile with at least one radial recess, which is axially open and leads to an axially closed chamber with a control surface for the cam. The cam moves radially against the ring body of the cam ring. The control surface is radially profiled, to co-operate with the cam profile when the cam ring is rotated. The insertion pipe part has an outer groove, into which the cam presses when the control surface of the holder pipe part is rotated. The cam presses against a cam rest formed in the chamber in the holder pipe part.

Description

The invention is directed to a connection in the preamble of the claim 1 specified type. Two pipe parts can be quickly moved by a steering movement couple or uncouple with each other. One pipe part serves as a connector and should therefore be referred to below as the "plug-in tube part". The other pipe part acts as the receiving link of the one-way connection and is therefore "Receiving tube part" called.

In the known connection of this type (DE 30 02 205 A1) the Ring body of the cam ring from a cone, under which there is a slotted Clamping ring with a wedge-shaped profile. The clamping ring belted the Plug-in tube part, which is axially inserted into a connecting sleeve of the receiving tube part could be. The connection sleeve had inner ribs, which in the preamble of the Claim 1 called inner profile with radial recesses and tangential  Chambers. The inner ribs had axially inward facing Control surfaces against which the cams of the cone ring with their axial Outside surfaces. This resulted in an axial tension between the Receiving tube part, the cone ring and, via the clamping ring, with the plug-in tube part. The cohesion between the two pipe parts resulted from a radial Non-positive connection on the peripheral surface of the plug-in tube part and the one sitting on it Clamping ring. When turning in is to rotate the cone ring is one relatively high force required to the mentioned axial tension and to generate the radial frictional connection between the two pipe parts. The difficult handling when coupling and uncoupling the pipe parts.

The invention has for its object a reliable pipe connection Develop in the preamble of claim 1 type, the very is smooth. This is according to the invention by those specified in claim 1 Measures achieved, which have the following special importance.

In the invention there is an axial form fit between the two tube parts conditions. The cam or cams is responsible for this form fit, the from a rest position outside the outer groove of the receiving tube part in a Working position are transferable, where they with their radially inner cam areas engage the outer groove of the tubular part. The two are at rest Unlocked pipe parts and can therefore be uncoupled by axial movement. In the working position, however, is a lock between the two pipe parts before because the cam with a rest in the tangential chamber of the Receiving tube part remains. An axial pulling apart of the two pipe parts is positively prevented. The radial movement of the cam comes when turning due to the radially inward facing profiled control surface inside the Chamber.

If the outer groove is arranged all around on the first pipe part and the The locking position of the cam or cams is present, so the plug-in tube part  transfer into different axial rotary positions. This is especially so interesting if this plug-in tube part is a tube angle. You get one System connection that connects various pipes to one of the Plug pipe part formed connection fitting allowed. The rotary adjustment of the Cam ring between the unlocking position and locking position extremely smooth. Tools for connecting the two pipe parts are not required; the rotation of the cam ring between the unlocking and Locking position is done manually using a suitable rotary handle on Cam ring.

It is particularly advantageous, as explained in more detail in claims 9 to 14, to arrange a latching position between the cam ring and the plug-in tube part, which combines these two components into one unit. This The pre-assembled unit is referred to below as the "pipe-ring combination" become. Here the components are captive. The pipe ring Combination is used as a plug-in element of the one-way connection. Of It is a particular advantage of the available elements, namely the cam on the one hand and the outer groove, on the other hand, to be used as elements of the latching position.

Further measures and advantages of the invention result from the claims, the following description and the drawings. In the drawings that is Invention shown in one embodiment. Show it

Fig. 1, in a longitudinal section along the section line II of Fig. 2, the realization of the Einrenkverbindung invention on the housing of a tapping tool, where the receiving tube part sits as a tube extension on the housing, while the plug-in tube part or the pipe-ring combination of a connection fitting one Branch line is formed,

Fig. 2 + 3 a side view of that shown in Fig. 1 drilling device, in the viewing direction of arrow II therein, with the connector fitting is in two different angular positions,

Fig. 4, on an enlarged scale showing the Einrenkverbindung of the two tube parts illustrative portion of the housing shown in Fig. 1 in the coupling situation,

Fig. 5, in Entkupplungsfall, the tube-ring combination, which serves as a combined plug member of the Einrenkverbindung,

Fig. 6, when the cam ring is removed the male pipe portion of the combination shown in Fig. 5,

Fig. 7 + 8 is an axial section along the line VII-VII of FIG. 8 or a radial section along section line VIII-VIII of Fig. 7 of the cam ring of the combination shown in Fig. 5,

Fig. 9 shows a fragment of the housing shown in Fig. 1, in the direction of arrow II of Fig. 1, when the tube-ring combination has been disengaged,

Fig. 10 + 11, in magnification, a cross section of the linked-together tube parts along the section line XX of Fig. 4, wherein the cam ring is in two rotary positions, namely in its securing position in Fig. 10 on the one hand and in its disengaged position in Fig. 11 on the other hand, and

Fig. 12, in high magnification, a fragment of an axial section along the section line XII-XII of Fig. 11 of the tube parts coupled together when they are in their unlocking position.

The finished one-way connection of two pipe parts 20 , 30 is shown in FIG. 4. A cam ring 40 plays an important role here. The one-way connection is achieved by plugging and twisting the two pipe parts 20 , 30 . Because the one tube part 30 acts as a plug-in member, it can, as already mentioned at the beginning, be called "plug-in tube part". Because of its recording function, the other pipe part 20 is referred to as the "recording pipe part".

In the present case, as shown in FIG. 1, the receiving tube part 20 is the lateral tube attachment on the housing 10 of a tapping device, not shown in detail. For this purpose, the housing 10 is fastened by means of suitable flanges 11 and suitable fastening means engaging there at a defined position of a media-carrying pipe 12 indicated by dash-dotted lines. The plug-in pipe part 30 consists of a connection fitting, which is designed here as a pipe bracket. Finally, this connection fitting serves to connect a dash-dotted branch line 13 indicated in FIGS . 1 and 4. The housing 10 accommodates the drilling tool (not shown in any more detail), which in use is effective with its drill in the direction 14 and drills the tube 12 in the foot region of the housing 10 . As shown in FIG. 2, the pipe 12 carries a medium under pressure, which may result in the main flow 15 in the pipe 12 , which is indicated by a dotted arrow in FIG. 2. After the tapping, a secondary flow 16 , which is also indicated by a point arrow in FIGS . 1 and 2, flows through the housing 10 , the pipe angle and the branch line 13 .

The cam ring 40 has a special appearance which can be seen from FIGS. 7 and 8. The cam ring 40 consists of an annular body 42 with in the present case four cams 41 integral therewith, which are equidistant from one another. The cams 41 are diametrically opposed to each other in pairs. Each of the cams 41 is located in a radial cutout of the ring body 42 and is connected to it via a joint 44 . The joint 44 advantageously consists of a flexible joint at one cam end, which merges into a segment 45 in this zone of the ring body 42 . The cam ring 40 is formed in one piece from elastic material, in particular plastic. The cams 41 act as on their joints 44 in the direction of the bending arrows 46 radially pivotable levers. Due to the material, the cams 41 are normally held in their rest position shown in FIGS. 8 and 11. If the cams 41 are bent in the direction of the bending arrows 46 , they come into their working position shown in FIG. 10, where they engage in a circumferential outer groove 31 of the plug-in tube part 30 . The cams 41 endeavor to come to their rest position in FIGS. 8 and 11. This is brought about by the restoring force of the deformation originating from the flexible joint, which is illustrated in FIG. 10 by a force arrow 47 . The cam ring 40 is provided at one end of its ring body 42 with a rotary handle 36 , which here consists of a radial flange. The circumference of the flange is provided with roughness or the like for better grip. This allows the rotary handle 36 to be gripped securely with the human hand. Turning tools can be used if necessary.

As shown in FIG. 6, in addition to the outer groove 31 , the plug-in tube part 30 also has annular grooves 32 , which serve to accommodate the sealing rings 34 shown in FIG. 5. The ring area on both sides of the circumferential outer groove 31 serves as a pivot bearing 33 for the cam ring 40 . There, the cam ring 40 is held together with the plug-in tube part 30 as a unit. This structural unit will be referred to below as "tube-ring combination 50 ". This cohesion is brought about by a latching posture, which is designed in a particularly advantageous manner according to FIG. 12. In this case, namely, the cams 41 and the outer groove 31 , which have a first function to be described in more detail, are used as latching elements 51 , 52 , which gives them a further, second function. This saves training and space for independent locking elements. The first element 51 of the latching position consists of a radial inner projection on the cam, which expediently takes place in the following manner.

As shown in FIG. 7 and especially in FIG. 12, the inner radial outline 48 of the cam 41 is at least partially formed in the form of a conical hollow profile with respect to the axis 17 of the cam ring 40 indicated by dash-dotted lines in FIG. 7. The hollow profile defines a conical tip circle 37 facing the aforementioned turning handle 36 , the outer diameter of which is advantageously somewhat larger than or equal to the outer diameter 35 of the rotary bearing region 33 of the plug-in tube part 30 which can be seen in FIG. 6. Conversely, the cone root circle 38 located at the other end of the cone is made smaller compared to the outer diameter 35 . This allows a particularly convenient assembly of the two components. The cam ring 40 from FIG. 7 is pushed axially onto the plug-in tube part 30 in the direction of the arrows 18 from FIG. 6. The conical hollow profile 48 acts like a funnel opening, which makes it easier to slide it over. The areas of the conical hollow profile 48 which are narrower than the tube diameter of the plug-in tube part 30 briefly cause the cams 41 which are articulated to be flexurally flexible to be pushed open until finally the narrowed cone root circle 38 also reaches the area of the outer groove 31 . Then the cam 41 snaps into the outer groove 31 and its end 39 on the foot side engages behind, as can be seen in FIG. 12, the upper region of the groove wall. This groove wall area is thus the second element 52 of the latching position. Then there is the assembly case according to FIG. 5.

The tube-ring combination 50 achieved by this snap assembly cannot be easily solved in opposite directions. A pulling off of the cam ring 40 from the plug-in tube part 30 in the sense of the arrows in FIG. 5 is not possible because of the steep surfaces at 51, 52. In the assembly position of the combination 50 , the cam ring 40 is thus sufficiently fixed in its pivot bearing area 33 . An axial shoulder 19 in the jacket region of the plug-in tube part 30 , which is produced, for example, by a circumferential collar in the tube part 30, can serve to limit the push-on movement of FIG. 6. The axial shoulder 19 limits the pivot bearing area 33 to the outside. As a result, the mounting position of the cam ring 40 in the pivot bearing area 33 is secured in both directions. There is a captive combination 50 of the two components. The latching force between the two components which brings about the assembly state is, as can be seen, achieved by the resistance during the deformation of the flexible joint on the cam 41 . The combination 50 from FIG. 5 serves as a plug-in element of the one-way connection, which is handled as a whole when coupling with respect to the receiving tube part 20 .

The receiving tubular member 20 has a special, from Fig. 9 and 11 ersichtliches inner profile. This inner profile initially comprises four radial recesses 21 , which are assigned to each of the four cams 41 and are axially open. When the combination 50 is connected to the receiving tube part 20 , as the first movement phase 27 of the restraining movement, an axial insertion takes place in the sense of the movement arrow from FIG. 4. The cams 41 pass through the insertion openings 26 into the radial cutouts 21 from the receiving tube part 20 . This intermediate state of the clutch is shown in Fig. 11. Then there is the second movement phase 28 of the restricting movement, namely a rotation of the cam ring 40 in the direction of the rotary arrow of FIG. 11. The cams 41 arrive in chambers 22 adjoining the radial recesses 21 which are axially closed. The chamber 22 and, if necessary, also the radial recess 21 have a profiled control surface 23 pointing radially inwards. This control surface 23 interacts with the outer radial contour 49 of the associated cam 41 . The control surface 23 increasingly narrows the radial height in the chamber 22 during the rotary actuation. As a result, the cams 41 are moved with their free ends to the axis of the plug-in tube part 30 in the sense of the bending arrows 46 already mentioned and therefore move deep into the outer groove 31 . Then the said working position of the cams 41 according to FIG. 10 is present. At the end of the steering movement, the cam 41, with its radially inner cam region shown in FIG. 10, engages in the outer groove 31 , while a considerable cam residue 54 remains in the chamber 22 . Consequently, the two tube parts 20 , 30 are locked together by the cam 41 . There is a positive connection between the two pipe parts 20 , 30 . Again, this can only be released by turning the cam ring 40 back on the tube part 30 in the direction of the arrow 28 'of FIG. 10. Then the rest position of the cams 41 according to FIG. 11 is again present.

After the two pipe parts 30 , 20 have been inserted, there is a coupling case where the cams 41 are adjusted by the cam ring 40 between the two rotary positions 41.1 and 41.2 shown in FIGS . 10 and 11, each of which is identified by an auxiliary line. During this rotation, the plug-in tube part 30 remains at rest in the receiving tube part 20 in the coupled state; only the cam ring 40 is pivoted on its previously described pivot bearing area 33 . The one rotary position 41.1 of FIG. 11 is limited by an end stop 55 at one, closed end of the radial recess 21 . In Fig. 11 the tube parts 30, 20 axially coupling and uncoupling can be, as already mentioned. The clutch position is therefore not secured. The rotary position 41.1 of FIG. 11 thus proves to be the “unlocking position” of the combination 50 with respect to the receiving tube part 20 .

The other rotational position shown in FIG. 10 is also limited by an opposite end stop 56 at the end of the chamber 22 . The cam 41 can come to bear on this after rotation 4 , as can be seen from FIG. 10. Then, as has already been described, an axial uncoupling of the two pipe parts 30 , 20 is not possible. The rotary position 41.2 of FIG. 10 thus proves to be the "securing position" of the cam ring 40 in the combination 50 .

It is advisable to secure at least one, but expediently both rotational positions 41.1 and 41.2 of the cam ring 40 in the coupling case of the two pipe parts 30 , 20 by means of a locking mechanism. It is particularly advantageous in this case to use the cams 41 again as elements of the locking mechanism. The inner surfaces of the chamber 22 and the radial recess 21 act as counter elements of the locking mechanism. It is useful to use the aforementioned radial control surface 23 in these two areas as internal surfaces and to give it a suitable additional profile. The cam-side element of this locking mechanism is expediently designed as a radially outwardly pointing nose on the cam 41 . To receive this nose 57 , the control surface 23 has two bulges 24 , 25 pointing radially outward. The holding force of the locking mechanism is the force generated by the above-described force arrow 47 , which results when the flexible joint 44 on the cam 41 is elastically deformed. This force therefore has a triple function in the invention. It initially serves to reset the cam 41 between the working position according to FIG. 10 and the rest position according to FIG. 11, that is to say in the opposite direction to the bending movements of the cam 41 . Furthermore, this force has the latching effect in the latching of the two components in combination 50 described in connection with FIG. 12. Finally, this force has the task of securing the aforementioned locking mechanism in the two rotational positions 41.1 and 41.2 of the cam ring 40 . This is achieved as follows:

The radial nose 57 is located at the opposite end of the cam with respect to the flexible joint 44 , as shown in FIG. 8. The first bulge 24 is arranged approximately at the transition between the radial recess 21 and the adjacent chamber 22 . In the unlocking position of the cam ring 40 , the nose 57 comes to lie in this first bulge 24 . In the clutch case of FIG. 11, this first rotational position of the cam ring 40 is reliably secured.

The second protrusion 25 of the locking mechanism is located, as shown in Fig. 11 can be seen, at the opposite, inner end stop 56 in the chamber 22. There the nose 57 snaps into the second rotational position 41.2 of the cams 41 according to FIG. 10. The descriptive, secured coupling of the two pipe parts 20 , 30 is thus additionally secured against unintentional turning back of the cams 41 into the first rotational position 41.1 . When the cam ring 40 rotates, a clear resistance can be felt when the tubular parts 20 , 30 are coupled, when the rotary handle 36 is actuated. This makes manual handling easier.

As shown in Fig. 2 and 3 illustrate, it is possible to bring the 20 male pipe 30 in various rotational positions relative to the housing 10 and seated thereon female pipe. The cam ring 40 can namely be rotated as desired relative to the rotationally symmetrical plug-in tube part 30 of the combination 50 . This adjustment movement 29 , 29 'can take place in the unlocked position in the relaxed state. However, it is also possible to do this after the securing position described in FIG. 10 has been reached. The advantage of the connection according to the invention lies in the radial free rotatability of the tubular part 30 with simultaneous axial securing of the cam ring 40 in the receiving part 20 . In the case of FIGS. 1 and 2, the tube angle is in a position perpendicular to the main tube 12 , which is illustrated by an auxiliary line in FIG. 2. In the case of FIG. 3, the pipe angle lies in a plane parallel to the main pipe 12 . The bypass flow in the pipe angle described at the beginning now continues to flow parallel to the main flow 15 in the pipe 12 , namely in the sense of the bypass flow 16 The described handling of the cam ring 40 between the locking and unlocking position according to FIGS. 10 and 11 is not affected by another position of the tube angle.

Reference list

10th

casing

11

Flange of

10th

12th

media-carrying main pipe

13

Branch line on

30th

14

Drilling direction in

10th

15

Mainstream in

12th

16

Sidestream in

30th

16

'Sidestream in

30th

at

30.2

17th

Axis of

40

18th

Arrow of the telescopic movement of

40

on

30th

18th

'Pulling movement of

40

of

30th

19th

axial shoulder for

40

on

30th

20th

Receiving tube part

21

Radial recess in

20th

22

Chamber in

20th

23

Control surface in

22

respectively.

21

24th

first bulge of

23

For

57

25th

second bulge of

23

For

57

26

Insertion opening of

41

in

21

27

first phase of the steering movement

28

second phase of the steering movement

28

'Arrow of reverse rotation of

40

29

first adjustment movement of

30th

across from

10th

29

'second adjustment movement of

30th

across from

10th

30th

Plug-in tube part

30.1

first rotation position of

30th

in terms of

10th

30.2

second rotation position of

20th

in terms of

10th

31

External groove of

30th

32

Ring grooves for sealants

33

Pivot on

30th

For

40

34

Sealing ring for

32

on

30th

35

Outside diameter of

30th

36

Turning handle on

40

, Flange

37

Cone head circle from

48

38

Cone foot circle from

48

39

foot face of

414

40

Cam ring

41

Cams from

40

41.1

first rotary position of

40

41.2

second rotary position of

40

42

Ring body of

40

43

radial breakout in

42

For

41

44

Joint for

41

45

Segment for

41

46

Bending arrow from

41

47

Return force arrow from

41

48

inner radial outline of

41

, Hollow cone profile

49

outer radial outline of

41

50

Pipe and ring combination

30th

,

40

51

first element of the resting position

52

second element of rest between

30th

and

40

53

radially inner cam area

54

radially outer cam residue

55

End stop of

40

at

41.1

56

End stop of

40

For

41.2

57

radial nose on

41

Claims (23)

1. One-way connection between two pipe parts ( 20 , 30 ), of which one pipe part ( 30 ) form the plug-in member and the other pipe part ( 20 ) form the receiving member of the one-way connection,
with a first tubular part ( 30 ) forming the plug-in member, which is surrounded by a cam ring ( 40 ) and consists of an annular body ( 42 ) with at least one radially projecting cam ( 41 ),
and with a second tubular part ( 20 ) forming the receiving member, which has an inner profile with at least one radial recess ( 21 ),
the radial recess ( 21 ) being axially open in order to receive the cam ( 41 ) of the cam ring ( 40 ) by an axial insertion movement,
and an axially closed chamber ( 22 ) opens tangentially into the radial recess ( 21 ), into which the cam ( 41 ) enters by rotating the cam ring ( 40 ),
and a control surface ( 23 ) for the cam ( 41 ) is provided in the chamber ( 22 ),
characterized by
that the cam ( 41 ) is radially movable relative to the ring body ( 42 ) of the cam ring ( 40 ),
that the control surface ( 23 ) located in the chamber ( 22 ) is profiled radially and cooperates with the outer radial contour ( 49 ) of the cam ( 41 ) during rotation
and that the plug-in tube part ( 30 ) has an outer groove ( 31 ) into which the cam ( 41 ) is pressed when the control surface ( 23 ) is rotated with its radially inner cam region ( 53 ), while a cam residue ( 54 ) is in the chamber ( 22 ) of the receiving tube part ( 20 ) remains. 2. Connection according to claim 1, characterized in that the outer groove ( 31 ) surrounds the tubular circumference of the plug-in tube part ( 30 ) and allows any rotational positions ( 30.1 , 30.2 ) of the plug-in tube part ( 30 ) relative to the receiving tube part ( 20 ). 3. Connection according to claim 1 or 2, characterized in that the cam ( 41 ) from its rest position, where it is at least partially outside the outer groove ( 31 ) of the plug-in tube part ( 30 ) in the coupling case, against a radially outward restoring force ( 47 ) can be moved radially inwards into a working position, in which the cam ( 41 ), when coupling occurs, moves deeper into the outer groove ( 31 ) of the plug-in tube part ( 30 ). 4. Connection according to one of claims 1 to 3, characterized in that the cam ( 41 ) is designed as a lever, sits in a radial cutout ( 43 ) of the ring body ( 42 ) and via a joint ( 44 ) with the ring body ( 42 ) connected is. 5. Connection according to claim 3 and 4, characterized in that the joint ( 44 ) consists of a flexible joint at one cam end, with which the cam ( 41 ) with a segment ( 45 ) of the ring body ( 42 ) of the cam ring ( 40 ) and that the deformation of the flexible joint generates the radially acting restoring force ( 47 ) of the cam ( 41 ). 6. Connection according to one of claims 1 to 5, characterized in that the cam ring ( 40 ) is integrally formed from elastically deformable material, in particular plastic. 7. Connection according to one of claims 2 to 6, characterized in that the cam ring ( 40 ) has a plurality of mutually equidistant cams ( 41 ),
that the cams ( 41 ) are arranged in the same radial plane of the common ring body ( 42 )
and that the cams ( 41 ) in the tube-ring combination ( 50 ) interact with the same circumferential outer groove ( 31 ) of the plug-in tube part ( 30 ). 8. Connection according to claim 7, characterized in that the cam ring ( 40 ) with four cams ( 41 ) is integrally formed, and that the four cams ( 41 ) in pairs to each other diametrically on the ring body ( 42 ). 9. Connection according to one of claims 1 to 8, characterized in that there is a latching position between the cam ring ( 40 ) and the plug-in tube part ( 30 ), which combines the two components to form a preassembled tube-ring combination ( 50 ), and that the latching position permits rotary actuation of the cam ring ( 40 ) on the tube part ( 30 ) of the combination ( 50 ) in order to secure or unlock the coupling of the two tube parts ( 20 , 30 ). 10. The connection according to claim 9, characterized in that the tube-ring combination ( 50 ) forms a plug-in member of the one-way connection from the plug-in tube part ( 30 ) and the cam ring ( 40 ). 11. The connection according to claim 10, characterized in that the two elements ( 51 , 52 ) of the latching position can be brought into engagement with one another by axially pushing the tube part ( 30 ) into the ring opening of the cam ring ( 40 ). 12. Connection according to claim 11, characterized in that the cam ( 41 ) of the cam ring ( 40 ) on the one hand and the outer groove ( 31 ) of the tube part ( 30 ) on the other hand at the same time the two elements ( 51 , 52 ) of the latching of the tube ring Form combination ( 50 ). 13. Connection according to claim 12, characterized in that the cam ( 41 ) has a radial inner projection on its inner radial contour ( 48 ),
which forms the one, cam-side element of the latching position and, when the plug-in tube part ( 30 ) is pushed axially into one another, snaps into the ring opening of the cam ring ( 40 ) behind the groove edge of the outer groove ( 31 ) from the plug-in tube part ( 30 ),
and that the latching force results from the deformation of the flexible joint on the cam ( 41 ). 14. Connection according to claim 13, characterized in that the inner radial contour of the cam ( 41 ) has essentially a conical hollow profile with respect to the axis ( 17 ) of the cam ring ( 40 ),
that the conical tip circle ( 37 ) of this profile is substantially larger / equal to the outer diameter ( 35 ) of the plug-in tube part ( 30 ) and allows these components to be axially pushed into one another to form a tube-ring combination ( 50 ),
that, however, the cone root circle ( 38 ) of this profile is made smaller compared to the outer diameter ( 35 ) of the plug-in tube part ( 30 ), as a result of which the adjacent ring zone in the cone hollow profile of the cam ( 41 ) forms the radial inner projection of the latching position,
and that the cam ( 41 ) engages behind the groove wall of the outer groove ( 31 ) with the front end of its conical hollow profile and prevents the two components in the combination ( 50 ) from being axially pushed apart. 15. Connection according to one of claims 1 to 14, characterized in that in the coupling case when the cam ( 41 ) of the tube-ring combination ( 50 ) in the radial recess ( 21 ) of the receiving tube part ( 20 ) is inserted ( 27 ), the cam ring ( 40 ) on the tube part ( 30 ) of the combination ( 50 ) can be rotated between two rotational positions ( 411 , 412 ), namely
a release position, on the one hand, where the cam ( 41 ) is axially aligned with the insertion opening ( 26 ) of the radial recess ( 21 ) and in its rest position is at most in the upper region of the outer groove ( 31 ),
and a securing position, on the other hand, where the cam ( 41 ) is moved tangentially into the axially closed chamber ( 22 ) of the receiving tube part ( 20 ) and from the radially profiled control surface ( 23 ) into its deep into the outer groove ( 31 ) of the combination ( 50 ) engaging working situation is brought. 16. The connection according to claim 15, characterized in that the cam ring ( 40 ) for its rotary adjustment in the combination ( 50 ) has a rotary handle ( 36 ). 17. The connection according to claim 16, characterized in that the rotary handle ( 36 ) consists of a radial flange on the cam ring ( 40 ), and that the flange is arranged in front of the front end of the receiving tube part ( 20 ) in the coupling case. 18. Connection according to one of claims 15 to 17, characterized in that at least one of the two rotational positions ( 41.1 , 41.2 ) of the cam ring ( 40 ) on the tube part ( 30 ) of the combination ( 50 ) is secured by a locking mechanism. 19. Connection according to claim 18, characterized in that the cam ( 41 ) from the cam ring ( 40 ) on the one hand and the inner surfaces ( 23 ) of the chamber ( 22 ) and / or the radial recess ( 21 ) from the receiving tube part ( 20 ) on the other hand the two elements form the ratchet. 20. Connection according to one of claims 1 to 19, characterized in that the radially profiled control surface ( 23 ) of the chamber ( 22 ) continues in the radial recess ( 21 ) of the receiving tube part ( 20 ). 21. Connection according to claim 19 or 20, characterized in that the cam ( 41 ) has on its outer radial contour ( 49 ) a radially outwardly pointing nose ( 57 ) which forms the first element of the locking mechanism,
that the profile of the control surface ( 23 ) in the chamber ( 22 ) and / or in the radial recess ( 21 ) has at least one radially outward bulge ( 24 , 25 ) for the nose ( 57 ), and the second element, the locking mechanism generated,
and that the locking force of the locking mechanism results from the force for the elastic deformation of the flexible joint on the cam ( 41 ). 22. Connection according to claim 21, characterized in that the nose ( 57 ) is arranged on the free cam end opposite the bending joint of the cam ( 41 ) and the profile of the control surface ( 23 ) has two bulges ( 24 , 25 ),
one bulge ( 24 ), which determines the unlocking position of the cam ( 41 ), is arranged in the transition between the radial recess ( 21 ) and the chamber ( 22 ) from the receiving tube part ( 20 ),
while the other bulge ( 25 ), which defines the securing position of the cam ( 41 ), is located at the stop end ( 56 ) of the cam ( 41 ) in the chamber ( 22 ). 23. Connection according to one of claims 1 to 22, characterized in that the receiving tube part ( 20 ) is formed by the tube attachment on the housing ( 10 ) of a tapping device or shut-off valve, which is used for drilling or shutting off media-carrying pipes ( 12 ) and that the plug-in tube part ( 30 ) or the tube-ring combination ( 50 ) is formed by a connection fitting of a branch line ( 13 ) for the medium.