Connection device for connecting a pipe with external circumferential elevation, uses and assembly methods

Description

[0001] The present disclosure relates to a connection device for connecting a pipe with an outer circumferential protrusion and to an assembly method.

[0002] A connection device for connecting a cable with a profiled outer diameter is known from EP 2 019 246 A2. Further connection devices are known from US 2010 / 090459 A1 and US 2010 / 007140 A1.

[0003] One task can be seen as proposing at least one way to seal a pipe with an outer circumferential protrusion.

[0004] The problem is solved by a connection device having the features of claim 1. To solve the problem, a connection arrangement having the features of claim 9, a use having the features of claim 10, and a use having the features of claim 11 are further proposed. In addition, a method having the features of claim 12 is proposed to solve the problem.

[0005] Advantageous embodiments and / or configurations and / or aspects will become apparent from the dependent claims, the following description and the figures.

[0006] According to one aspect, a connection device for connecting a pipe with an outer circumferential protrusion, such as a corrugated pipe, is proposed. The connection device comprises a connecting part with a receptacle into which a longitudinal section of the pipe bearing the protrusion is inserted. In the following disclosure, the term "pipe" is understood to mean an elongated hollow body, preferably of any type, in particular with any cross-section, for example, a round or circular cross-section.

[0007] The receptacle has a central axis extending in the insertion direction. The receptacle is circumferentially bounded by a wall extending around the central axis. The receptacle has an insertion opening with an opening surface arranged transversely to the central axis. The receptacle also has a base surface arranged transversely to the central axis.

[0008] The base surface serves to align the pipe's protrusion. This alignment promotes a fluid-tight connection between the pipe and the fitting, as the flank of the protrusion and the base surface act as sealing surfaces against each other. For example, the base surface and the flank of the protrusion may correspond to each other and / or be flat.

[0009] In particular, the connecting part is rotationally symmetrical, for example, rotationally symmetrical with respect to the central axis of the receptacle. In particular, the connecting part is tubular or sleeve-shaped. In particular, the receptacle is arranged or formed in a tubular or sleeve-shaped section of the connecting part. In particular, at least in the area of ​​the receptacle, the outer circumference of the connecting part is uniform in the axial direction and / or has the same radius. In particular, the outer circumference of the connecting part is concentric with the receptacle. In particular, the central axis of the connecting part and the central axis of the receptacle are arranged coaxially with each other.

[0010] The connecting device also includes a ring element. The ring element is designed to at least partially surround and / or encircle the length of the pipe. The ring element can be constructed in one piece or in multiple parts, for example, in two parts. For example, the parts of the ring element each form a circumferential section of the ring element. For example, the ring element is formed by two half-shells. For example, the ring element is cylindrical, in particular a hollow cylinder. For example, the ring element is sleeve-shaped. For example, the ring element has a round cross-section, in particular a circular cross-section.

[0011] The ring element is designed to be inserted into the space between the circumferential wall of the receptacle and the pipe in such a way that an axial end of the ring element acts as a stop for the protrusion. This secures the pipe against being pulled out of the receptacle by creating an axially acting positive fit against the insertion direction. This also helps to keep the pipe, with its protrusion, in contact with the base surface. This, in turn, helps to maintain a permanently fluid-tight connection between the pipe and the fitting.

[0012] The connecting device comprises a locking element associated with the connecting part. The locking element has at least one material section that is made of or consists of a deformable material. This at least one material section is designed to be deformed into a locking position in order to prevent the ring element from being moved out of the receptacle. The locking position is a radial position with respect to the central axis of the receptacle, in which the at least one material section acts, or can act, as a lock to prevent the ring element from being moved out of the receptacle.

[0013] This provides a further measure to secure the pipe against being pulled out of the receptacle. This measure now targets the ring element, whereby the material section is intended to prevent the ring element from being pulled out of the receptacle and / or to achieve an axially acting positive fit against the insertion direction. It also helps to keep the ring element in its inserted position, in which the pipe, with its raised section, rests against the base of the receptacle. This, in turn, helps to maintain a permanently fluid-tight connection between the pipe and the fitting.

[0014] In this disclosure, the term "deformation" refers to a change in the shape of a body, such as the material section described above, as a result of the action of an external force. The deformation may be irreversible. Such deformation is permanent, for example, from the point at which the deformable or deformed body reaches its yield strength, and is therefore also referred to as "plastic deformation." A prerequisite for plastic deformation is that the material of the body to be deformed is malleable. In this disclosure, the term "malleable" or "malleability" refers to the property of the material, or more generally, of a material, to be permanently deformed by external stress. The deformation may be caused by flanging or other cold forming processes.

[0015] The material section is designed to be made of or consisting of a deformable material and is configured to form the aforementioned locking mechanism that prevents the ring element from being removed from the receptacle, i.e., to be brought into the locking position by deformation. The material section is designed to be formed radially inward, i.e., radially inward toward the central axis of the receptacle, to create the locking mechanism that prevents the ring element from being removed from the receptacle. The locking mechanism created in this way is, for example, permanent and / or indestructible.

[0016] The malleable material section allows for a preferably targeted change in shape to create the locking mechanism for the ring element. Such a change in shape can be easily achieved using a press tool or similar tool. For example, this only requires applying a forming force in the axial direction or in the insertion direction.

[0017] For example, the material section is formed around the central axis of the receptacle. For example, the material section is completely circumferential around the central axis of the receptacle, or circumferential with at least one interruption, or circumferential with at least one circumferential section.

[0018] The fuse element is designed to be integrated into the connector. The fuse element can be molded directly onto the connector.

[0019] It is designed that the material section of the locking element is formed on an axial longitudinal segment of the circumferential wall of the receptacle. The material section of the locking element is defined by this axial longitudinal segment of the circumferential wall. This facilitates a technically simple implementation of the locking element, as it can be manufactured as part of the connecting element during the manufacturing process of the connecting element. Furthermore, this design promotes a high degree of functional integrity, since the function of the locking element can be performed by the connecting element itself, thus eliminating the need for a separate locking element.

[0020] The circumferential wall of the receptacle is designed to be radially inwardly deformed along the axial length section present in the area of ​​the insertion opening of the receptacle, in order to form a barrier against the ring element being removed from the receptacle. This radial inward deformation of the circumferential wall results in a radial taper of the receptacle in the area of ​​the insertion opening. As a result of this radial inward deformation of the circumferential wall, the opening area of ​​the insertion opening is reduced.

[0021] To promote or facilitate deformation of the circumferential wall in the axial length section, the invention provides that the circumferential wall of the receptacle has a wall thickness in a region of the axial length section that is smaller than the wall thickness of the circumferential wall in an adjacent axial length section. The adjacent axial length section extends in the direction of the bottom surface of the receptacle.

[0022] One possible embodiment consists of the ring element having a radially outwardly projecting and / or outwardly projecting projection. The projection is elastically movable and / or elastically deformable in the axial direction of the ring element. Therefore, the projection can also be described as an "elastic projection".

[0023] In the present disclosure, the term "elastic" is understood to mean the property of a material to change its shape under the influence of force and to preferably return to its original shape when the force is removed. This also includes the fact that the projection moves and / or deforms in the axial direction of the ring element under the influence of force and preferably returns to its original position and / or shape when the force is removed.

[0024] The projection is associated with an axial section of the ring element, so that the material section of the locking element is brought into the locking position against the force of the projection, thus preventing the ring element from being moved out of the receptacle of the connecting part. When the ring element is inserted into the receptacle of the connecting part, the axial section of the ring element is located in the space between the circumferential wall of the receptacle and the pipe.

[0025] The projection prevents the ring element from potentially detaching from its target position relative to the pipe and thus avoids any resulting leakage between the connecting parts. Such detachment can occur due to possible springback, particularly slight springback of the material section after it has been deformed into the locking position. This springback can create unwanted axial play between the material section and the ring element, allowing the ring element to move slightly out of its target position in the axial direction. The projection exerts a restoring force as a preload force on both the deformed material section and the ring element, so that if the deformed material section springs back, any potential play between the ring element and the material section is counteracted or completely prevented.

[0026] The projection can be axially movable and / or deformable with spring elasticity. The projection can encircle the outer circumference of the ring element, for example, completely or with at least one interruption. For example, the projection is integrally formed on the ring element, particularly its outer circumference. For example, the ring element with the projection is made of or incorporates spring steel. For example, the projection is designed as a circumferential collar or rib.

[0027] In another embodiment, the receptacle has a recess. In particular, the recess is circumferential around the central axis. The recess is a radial recess. This means that the recess extends radially in the direction of the receptacle's central axis. For example, the recess is provided on the circumferential wall of the receptacle. For example, the recess is provided in the area of ​​the receptacle's base surface. For example, a side surface of the recess forms a radial extension of the base surface in order to increase the contact area between the pipe or protrusion and the base surface, and thus the sealing area.

[0028] The ring element is designed to be inserted into the space between the circumferential wall of the receptacle and the tube in such a way that an axial end of the ring element presses against the protrusion of the tube in order to deform the protrusion by allowing forming material to flow into the recess of the receptacle.

[0029] In this embodiment, the recess defines a region into which at least a portion of the material or forming material can flow during the forming of the raised section. This enables the pipe to be anchored in the receptacle and / or creates an axially acting positive fit or at least an axially acting frictional fit of the pipe in the receptacle, at least opposite to the insertion direction. Furthermore, this facilitates keeping the pipe with its raised section in contact with the base surface. This, in turn, facilitates the long-term maintenance of a fluid-tight connection between the pipe and the connecting part.

[0030] Such a deformation of the protrusion can be easily achieved using a press tool or similar device. For example, it is only necessary to apply a forming force in the axial direction or in the insertion direction.

[0031] If the pipe's protrusion is formed as a bulge, this bulge can be compressed axially, in particular, shrunk. This facilitates the formation of a solid pipe collar around the pipe, thereby improving the sealing function of the connection between the pipe and the fitting.

[0032] In another embodiment, the ring element is designed as a clamping ring and / or compression ring. One possible configuration consists of the ring element having a deformation section. For example, the deformation section is an end section of the ring element, particularly an axial end section. For example, the deformation section is arranged at an end section of the ring element that faces the receptacle when the connecting part is inserted and / or is inserted first. The deformation section is made of, or comprises, a deformable material. For example, the material is plastically or elastically deformable. The deformation section is designed to be compressed in the radial direction.

[0033] The circumferential wall of the receptacle is designed along an axial length section to act as a die for the deformation section of the ring element, or to be used to bring the deformation section into contact with a flank of the protrusion. For example, the flank is a side surface of the protrusion that runs transversely to the central axis of the receptacle.

[0034] The deformation section of the ring element and the axially sized section of the circumferential wall of the receptacle, which serves as a die, make it possible to insert the ring element into the receptacle by deforming the deformation section. This creates, for example, a force-fit connection between the receptacle and the ring element acting in the axial direction. In this case, this force-fit connection prevents the ring element from moving out of the receptacle.

[0035] If the pipe has further protrusions, and these protrusions are arranged one behind the other in the axial direction and are located along the length of the pipe to be inserted, an axially acting force-fit can be achieved between the receptacle and the ring element, and additionally between the ring element and the pipe, during the insertion of the ring element and deformation of the deforming section. The force-fit between the ring element and the pipe can be achieved, for example, by the deforming section coming into contact with the apex of at least one of the further protrusions, particularly in a press fit.

[0036] It can be designed so that the receptacle tapers towards the bottom surface along the axial section acting as a die. This facilitates the additional guiding function of the axial section acting as a die when inserting the ring element into the receptacle, directing the inserted end of the ring element against or towards a flank of the pipe's protrusion.

[0037] By tapering the axial section, it is possible to deform the section radially inwards in such a way that it meets the flank of the protrusion but surrounds the other protrusions circumferentially. This ensures a force-fit in the radial direction between the ring element and the apex of at least one of the other protrusions. For example, the circumferential wall of the receptacle is designed as an inclined surface over the axial section acting as a die. This facilitates the implementation of the aforementioned effects in a technically simple manner.

[0038] It can be provided that one axial length section of the circumferential wall, acting as a die, is arranged between the recess and the other axial length section of the circumferential wall that can be formed into the aforementioned locking mechanism. For example, one axial length section of the circumferential wall acting as a die is the adjacent length section described above.

[0039] In another embodiment, the ring element has a pressure surface extending transversely to the central axis, and the connecting part has a counter surface extending transversely to the central axis. The counter surface is designed to serve as a bearing surface for a pressing device, such as a crimping tool, to exert a pressure force on the pressure surface of the ring element. This facilitates technically simple handling, enabling the ring element to be inserted into the receptacle and positioned as desired within the receptacle and / or between the circumferential wall of the receptacle and the inserted section of pipe.

[0040] For example, the pressure surface is formed at the edge of the ring element or is at least partially formed by the edge of the ring element. For example, the counter surface is formed at a flank and / or side surface of a cut or undercut or a collar of the connecting part or is at least partially formed by it.

[0041] In a further embodiment, the locking element has a pressure surface and / or a pressure edge to deform the material section by applying a pressure force to it, thus forming the locking mechanism described above. In particular, the pressure surface and / or the pressure edge are designed and / or arranged to absorb a pressure force acting orthogonally to the central axis of the receptacle or obliquely to the central axis of the receptacle. In particular, the pressure surface is arranged parallel to the central axis or obliquely to the central axis of the receptacle. In particular, the pressure surface is formed on the outer circumference of the locking element or by an outer circumferential section of the locking element. In particular, the pressure edge is an end face edge, preferably on the outer circumference of the locking element.

[0042] For example, the connecting part has a counter surface extending transversely to the central axis. In particular, this counter surface is designed to serve as a bearing surface for a pressing device, such as a press, to exert the pressing force on the pressing surface or the pressing edge of the locking element. This facilitates technically simple handling for deforming the material section of the locking element into a desired shape, for example, to deform the material section radially inwards, thus creating a barrier against the ring element being removed from the receptacle. For example, the counter surface is formed on a flank and / or side surface of a cut, undercut, or collar of the connecting part, or is at least partially formed by such a feature.

[0043] The connector can contain or be made of a metallic material. For example, the connector may be made of or consist of a metal or a metal alloy. Alternatively, the connector can also be made of or have a plastic material.

[0044] The ring element can be made of a metallic material, either a metal or a metal alloy. For example, the ring element could be made of brass, steel, or stainless steel. Alternatively, the ring element can also be made of a plastic material, such as a thermoset plastic.

[0045] The material of the component section can be a metallic material, which includes or consists of a metal or metal alloy. Alternatively, the material of the component section can also be a plastic material, which includes or consists of a plastic. For example, the material of the component section is a thermoset. For example, the component section is injection-molded onto the connecting part.

[0046] In another embodiment, the connecting part has a coupling point that is fluidically connected to the receptacle, for example via a channel, in order to couple the connecting part to a connection of another device. For example, the coupling point has a thread to connect the connecting part to the connection of the other device by screwing or a screw connection.

[0047] For example, the coupling point has a bore with an internal thread to connect the connecting part to the connection of the other device by screwing or a screw connection. In particular, the outer circumference of the connecting part has a longitudinal section which has a rectangular, especially polygonal, cross-section, for example square or hexagonal, in order to allow a wrench or similar tool to be attached to it.

[0048] In a further embodiment, the connecting device is designed as a connector for joining the ends of two pipes with a raised section. In particular, it is provided that the connecting part has a further receptacle connected to the receiving section, for example via a channel, and that a further ring element is provided that interacts with the further receptacle. The further receptacle can be designed according to the receiving section described above. The further ring element can be designed according to the ring element described above.

[0049] A further aspect is addressed by proposing a connection arrangement comprising the connection device described above and a pipe with an outer circumferential protrusion. The pipe can be the one described above.

[0050] For example, the pipe is a corrugated pipe. In the present disclosure, the term "corrugated pipe" refers to a pipe having a corrugated diameter that varies in shape. A wave of the corrugated pipe comprises a wave crest, to which, viewed in the axial direction, a flank extends, leading into a wave trough, from which the crest of another wave then extends. Preferably, the corrugated pipe is flexible to a certain degree due to this corrugation. In the context of the present disclosure, the term "corrugated pipe" also includes a corrugated hose.

[0051] Another aspect is the proposed use of the connection device described above for connecting a pipe with a raised outer circumference. For example, the pipe is a corrugated pipe. The pipe can be the pipe or corrugated pipe described above. Preferably, the pipe is a metallic pipe. In principle, the corrugated pipe can also be a plastic corrugated pipe.

[0052] Another aspect proposes using the connection device described above to connect a pipe to a device performing a technical process, in order to supply a fluid to the device or discharge a fluid from the device via the pipe. The device can be a thermal or refrigeration system. For example, the device is an air conditioner and / or a heat pump. The pipe is suitable for, or used for, transporting refrigerants. The pipe is also suitable for, or used for, transporting volatile and / or gaseous media, such as hydrogen.

[0053] Another aspect is addressed: a method for mounting a pipe with a circumferential protrusion to a connecting piece is proposed. The method comprises the following steps: i) Providing the connection device described above; ii) Inserting a longitudinal section of the pipe having the protrusion into the receptacle of the connection part of the connection device; iii) Inserting the ring element of the connection device into a space between the circumferential wall of the receptacle and the pipe, such that an axial end of the ring element acts as a lock for the protrusion to secure the pipe against being moved out of the receptacle; iv) Forming the material section of the locking part of the connection device from an initial shape into a locking shape, wherein in the initial shape an insertion opening used for inserting the pipe is open and in the locking shape the insertion opening is closed, so that a lock against being moved out of the receptacle is present.

[0054] In this process, the material section is formed radially inwards in the direction of the central axis of the receptacle in order to form the barrier against the ring element moving out of the receptacle, i.e. to achieve the locking shape.

[0055] Following further training, in step ii) the ring element is inserted into the space between the circumferential wall of the receptacle and the tube in such a way that an axial end of the ring element presses against the protrusion of the tube in order to cause a deformation of the protrusion, in particular by the flow of forming material into the radial recess of the receptacle.

[0056] This method facilitates easy assembly of the pipe to the fitting, ensuring a durable and leak-proof connection between the pipe and the fitting. In particular, this method creates a permanent bond between the pipe and the fitting.

[0057] Reference is made to the advantages described in connection with the connection device, which also form the basis of the procedure.

[0058] Further details and features will become apparent from the following description of several exemplary embodiments with reference to the drawing. These show Fig. 1 shows a possible embodiment of a connection device for connecting a pipe with an outer circumferential protrusion in a partially sectional assembly state, Fig. 2 shows the connection device of the Figure 1 in an assembled final state as a partial section, Fig. 3 another possible embodiment of a connection device for connecting a pipe with an outer circumferential protrusion as a partial section, Fig. 4 the connection device of the Figure 3In an exploded view, Fig. 5 shows another possible embodiment of a connection device for connecting a pipe with an outer circumferential protrusion in an assembled state, and Fig. 6 shows the connection device of the Figure 5 in a fully assembled final state.

[0059] Figures 1 and 2 Figure 1 shows a possible embodiment of a connection device 1 in a perspective view as a partial section. The connection device 1 is suitable for connecting a pipe 100 with an outer circumferential protrusion 110, such as a corrugated pipe. Figure 1 The figure shows the connection device 1 together with such a pipe 100 in an assembled state. Figure 2 The diagram shows the connection device 1 and the pipe 100 in their assembled final state. Figures 1 and 2 The connection device 1 is shown by way of example as a section of a connection area with the pipe 100.

[0060] The connection device 1 comprises a connection part 10 with a receptacle 11 for inserting a longitudinal section 120 of the tube 100 having a projection 110. Preferably, the longitudinal section 120 is an end section. Preferably, the longitudinal section 120 comprises an end 130 of the tube 100.

[0061] The preferred recording is 11 via a channel 12 with a (in the Figures 1 and 2 The coupling point of the connecting part 10 (not shown) is flow-connected. The receptacle 11 has a central axis 13 extending in an insertion direction E. The receptacle 11 has an insertion opening 14 with an opening surface 14.1 arranged transversely to the central axis 13. Figure 4 The recess 11 is bounded by a circumferential wall 15 extending around the central axis 13. The recess 11 has a base 16 which has a base surface 16.1 arranged transversely to the central axis 13 in order to bring the elevation 110 of the pipe 100 into contact with it.

[0062] Preferably, the connecting part 10 is rotationally symmetrical with respect to the central axis 13 of the receptacle 11, at least in the region of the receptacle 11, for example, in a sleeve-shaped or tubular form. For example, the connecting part 10 has a uniform outer circumference in the axial direction, at least in the region of the receptacle 11. For example, the connecting part 10 has a constant radius with respect to the central axis 13 of the receptacle 11, at least in the region of the receptacle 11.

[0063] The connecting device 1 comprises a ring element 30. The ring element 30 is configured to at least partially surround or engage the longitudinal section 120 of the tube 100. The ring element 30 is configured to be inserted into the space 3 such that an axial end 31 of the ring element 30 acts as a lock for the projection 110 in order to secure the tube 100 against being moved out of the receptacle 11, in particular by means of a positive locking mechanism.

[0064] The connecting device 1 further comprises a locking element 50, which is associated with the connecting element 10. The locking element 50 has a material section 51, which is made of or consists of a deformable material. The material section 51 is formed circumferentially around the central axis 13 of the receptacle 11. The material section 51 forms a ring that at least partially surrounds the tube 100. The material section 51 is designed to be formed radially inwards with respect to the central axis 13 in order to form a barrier against the ring element 30 moving out of the receptacle 11. Figure 2 ).

[0065] As from the Figures 1 and 2As can be seen, the locking element 50 is formed on the connecting element 10. The locking element 50 is integrally formed on the connecting element 10. Furthermore, the material section 51 of the locking element 50 is formed on an axial longitudinal section 15.1 of the circumferential wall 15 of the receptacle 11. To facilitate forming, the circumferential wall 15 of the receptacle 11 is provided in a region of the axial longitudinal section 15.1 with a wall thickness D1 which is smaller than the wall thickness D2 of the circumferential wall 15 in an adjacent axial longitudinal section 15.2, which extends in the direction of the bottom surface 16.1 ( Figure 1 and 3 ).

[0066] As can be seen in particular from the Figure 1As can be seen, the receptacle 11 has a radial recess 17 circumferentially around the central axis 13 in the area of ​​the base surface 16.1. The recess 17 can be a material cutout, for example, formed by an undercut or notch. The recess 17 is associated with the circumferential wall 15 of the receptacle 11, and is specifically formed there. For example, a side wall of the recess 17 forms a radial extension of the base surface 16.1 of the receptacle 11, i.e., an extension of the base surface 16.1 of the receptacle 11 in the radial direction with respect to the central axis 13.

[0067] As can be seen in particular from the Figure 2As can be seen, the recess 17 can be used to receive forming material resulting from a deliberate deformation of the tube 100 in the area of ​​the protrusion 110. This allows the tube 100 to be anchored in the receptacle 11 due to the recess 17, thus creating a positive fit acting in the axial direction. To achieve this, the ring element 30 is positioned in the space 3 between the circumferential wall 15 of the receptacle 11 and the tube 100, such that the axial end 31 of the ring element 30 presses against the protrusion 110 of the tube 100, thereby causing the protrusion 110 to be deformed and forming material to flow into the recess 17 of the receptacle 11.

[0068] As can be seen particularly from the Figures 1 and 2As can be seen, the ring element 30 has a deformation section 33, which is made of or consists of a deformable material and is designed to be compressed in the radial direction. Accordingly, the circumferential wall 15 of the receptacle 11 is designed, at least over an axial length section 15.3, to act as a clamping surface for the deformation section 33. This allows the deformation section 33 to slide along the axial length section 15.3 of the circumferential wall 15 under radial deformation when the ring element 30 is inserted into the receptacle 11, thereby clamping the deformation section 33 against the axial length section 15.3. In this way, for example, a force-fit in the axial direction is achieved, by which the ring element 30 is secured against being moved out of the receptacle 11 by a force-fit connection.

[0069] Additionally, the circumferential wall 15 of the receptacle 11 is configured, at least along its axial length 15.3, to act as a die for the deformation section 33 of the ring element 30. The circumferential wall 15 is designed as a die over this axial length 15.3 such that, when the ring element 30 is inserted into the receptacle 11, the deformation section 33 is formed radially inwards by the die to such an extent that the deformation section 33 is brought into contact with a flank of the projection 110 or at least points towards the flank of the projection 110. Such a deformation is advantageous if the tube 100 has further projections 140, which, viewed in the direction of the longitudinal extent of the tube 100, are arranged one behind the other starting from the projection 110. Such a tube 100 can be a corrugated tube.

[0070] The axial longitudinal section 15.3 of the circumferential wall 15, acting as a die, is designed such that the deformation section 33 of the ring element 30 is brought into contact with one flank of the projection 110 at its end face, or at least points in the direction of one flank of the projection 110, while the other projections 140 are encompassed by the deformation section 33 or point with their apex towards the inner circumference of the ring element 30. It is also provided that the deformation section 33 is in a clamping connection on the one hand with respect to the circumferential wall 15 of the receptacle 11, in particular the axial longitudinal section 15.3, and on the other hand with respect to the tube 100, so that the tube 100 and the ring element 30 are held in the receptacle 11 against displacement by a force-fit connection.

[0071] To achieve the deformation or deformation of the deformation section 33 described above, the receptacle 11 is designed to taper towards the bottom surface 16.1 over one axial length section 15.3. For example, the circumferential wall 15 of the receptacle 11 is designed as an inclined surface over one axial length section 15.3.

[0072] The ring element 30 has an annular base body 35. The deformation section 33 is arranged on this base body, and in particular, is integrally formed with it. The deformation section 33 adjoins the base body 35 in the direction of a central axis of the ring element 30. The base body 35 has thicker walls than the deformation section 33. Preferably, the axial extent of the deformation section 33 in the direction of the central axis of the ring element 30 is greater than the axial extent of the base body 35.

[0073] The ring element 30 has a pressure surface 34 against which a pressure force acting in the insertion direction E can be applied in order to insert the ring element 30 into the receptacle 11 of the connecting part 10. The pressure surface 34 extends transversely to the central axis of the ring element 30. The pressure surface 34 is formed on the base body 35 of the ring element 30. The pressure surface 34 is formed at one end 32 of the ring element 30, which is arranged opposite the insertion end 31 of the ring element 30. Figure 4 ).

[0074] To achieve the deformation of the material section 51 described above for forming the axial lock for the ring element 30, a pressure surface 52 and / or a pressure edge 58 is provided. The pressure surface 52 or the pressure edge 58 is arranged such that by applying a pressure force to or against it, the material section 51 is deformed radially inwards, thereby forming the lock. The deformation can be based on flanging or other cold forming of the material section 51.

[0075] The pressure surface 52 is formed on the outer circumference of the locking element 50 or is formed by an outer circumferential section of the locking element 50. For example, the pressure surface 52 is arranged in the area of ​​the edge of the insertion opening 14. Preferably, the pressure edge 58 is an end-face edge, preferably on the outer circumference of the locking element 50. For example, the pressure edge 58 is arranged in the area of ​​the edge of the insertion opening 14 and / or is formed by or formed on the outer edge of the edge.

[0076] One possible way in which the connection device 1 works Figures 1 and 2 The connection of the above-described pipe 100 is briefly explained below: The pipe 100 is inserted into the receptacle 11 of the connection part 10, so that the protrusion 110 of the insertion pipe 100 is brought into contact with the bottom surface 16.1 of the receptacle 11 with one flank ( Figure 1The ring element 30 is then inserted into the space 3 between the circumferential wall 15 of the receptacle 11 and the pipe 100. For example, a pressure force is applied to the pressure surface 34 of the ring element 30 in the insertion direction E.

[0077] Preferably, such a high compressive force is applied that the ring element 30 is moved under a radially inward deformation along the axial length section 15.3 of the receptacle 11 acting as a die and presses with one axial end 31 against the protrusion 110 of the tube 100, preferably bridging the further protrusions 140, if present.

[0078] Furthermore, the compressive force is dimensioned to be high enough to cause axial compression of the projection 110, such that forming material flows into the radial recess 17 of the receptacle 11, anchoring the tube 100 in the recess 17. This results in permanent anchoring of the tube 100 in the receptacle 11 of the connecting part 10. In addition, the bottom surface 16.1, together with the adjacent flank of the projection 110 of the tube 100, forms a fluid-tight seal between the tube 100 and the connecting part 10.

[0079] In a further step, the material section 51 of the locking element 50 is transformed from its initial shape into a locking shape. In the initial shape, the insertion opening 14 of the receptacle 11 is exposed by the material section 51, whereas in the locking shape, the insertion opening 14 is blocked by the transformed material section 51, thus preventing the ring element 30 from being removed from the receptacle 11. For this purpose, a compressive force, preferably acting obliquely, is applied to the pressing edge 58. Additionally or alternatively, a compressive force can be applied to the pressing surface 52, which is directed orthogonally to the central axis 13 or obliquely to it.

[0080] The pressure force required to connect the pipe 100 to the connection device 1 can be generated by a pressing or crimping device. For this purpose, the counter surface 18 provided on the connection part 10 can be used as a support for the pressing device.

[0081] Figures 3 and 4 show another possible embodiment of a connection device 1' in a partial section ( Figure 3 ) and in an exploded view ( Figure 4 ). Components of the connection device 1', which are connected to components of the connection device 1 of the Figures 1 and 2 Devices that are identical in construction or function are marked with the same reference numerals; in this respect, reference is made to the description of connection device 1 of the Figures 1 and 2 referred. In the Figure 3 The connecting device 1' is in its assembled final state, as already shown in the Figure 2 shown and described in relation to the connection device 1.

[0082] In the connection device 1', the connection part 10 is provided with a coupling point 19 for connecting the connection part 10 to a connection of another device. Preferably, the coupling point 19 is flow-connected to the receptacle 11 via the channel 12 in order to be able to supply or discharge a fluid or medium transported via the pipe 100 and the channel 12 to the other device via the coupling point 19.

[0083] Preferably, the coupling point 19 is formed on a projection 21, which is arranged on, and in particular integrally formed with, a base section 22 having the receptacle 11. The coupling point 19 can have a bore provided with an internal thread 20 in order to connect the connecting part 10 to the connection of the further device by screwing or a screw connection. To facilitate screwing, the connecting part 10 can have a square outer circumference, for example in the area of ​​the projection 21. This allows a tool, such as a wrench, to be attached.

[0084] Figure 5 Figure 1 shows another possible embodiment of a connection device 1" in a longitudinal section and in a representation of one half of the connection device 1". The connection device 1" can be a modification of the connection device 1 of Figures 1 and 2 be. Components of the connection device 1", which are connected to components of the connection device 1 of the Figures 1 and 2 Devices that are identical or functionally equivalent are provided with the same reference numerals; in this respect, reference is made to the description of connection device 1 of the Figures 1 and 2 referred.

[0085] The connecting device 1" of the Figure 5 differs from the connection device 1 of the Figures 1 and 2 This is achieved, among other things, by providing a ring element 30'' with a radially outwardly projecting and / or outwardly projecting projection 36. The projection 36 is elastically movable and / or elastically deformable in the axial direction of the ring element 30''. The ring element 30'' has an annular base body 35'' on which the projection 36 is arranged, in particular, integrally formed. Preferably, the deformation section 33 is also arranged, in particular, integrally formed, on this base body 35''. Preferably, the deformation section 33 adjoins the base body 35'' in the direction of a central axis of the ring element 30'' or forms an axial end section of the base body 35''.

[0086] The projection 36 is associated with an axial section of the ring element 30''. Preferably, the axial section is arranged behind the deformation section 33 when viewed in the insertion direction E. Preferably, the projection 36 is arranged such that, when the ring element 30'' is inserted into the receptacle 11 of the connecting part 10, the axial section or the projection 36 is located in the space 3 between the circumferential wall 15 of the receptacle 11 and the tube 100. Figure 5 This assembly state is shown as an example, where the ring element 30'' is already in its effective position against the projection 110 of the pipe 100, particularly in the direction leading to the Figures 1 and 2 as described.

[0087] If material section 51 is now moved into the locking position, as has already been done, for example, during the Figures 1 and 2As described, in the connection device 1", the material section 51 is moved under elastic movement or elastic deformation of the projection 36. The material section 51 is thus brought into the locking position against the force of the projection 36. This assembly state is described in Figure 6 shown as an example.

[0088] In the locked position of the material section 51, a restoring force of the projection 36 acts as a preload force on the material section 51. The force emanating from the projection 36 ensures that, in the event of a possible springback of the formed material section 51, the ring element 30'' remains in the effective position against the tube 100, thus promoting a permanently fluid-tight connection.

[0089] The projection 36 can be spring-elastically deformable in the axial direction. The projection 36 can encircle the outer circumference of the ring element 30'', for example, completely or with at least one interruption. For example, the ring element 30'' with the projection 36 is made of or incorporates spring steel. For example, the projection 36 is designed as a circumferential collar or rib, or as a circumferential rib. Reference symbol list

[0090] 1 connection device 1' connection device 1" connection device 3 space 10 Connection part 11 Receptacle 12 Channel 13 Center axis 14 Insertion opening 14.1 Opening area 15 Circumferential wall 15.1 Axial length section 15.2 Adjacent axial length section 15.3 Axial length section 16 Base 16.1 Base surface 17 Recess 18 Counter surface 19 Coupling point 20 Internal thread 21 Extension 22 Base section 30 Ring element 30" Ring element 31 End 32 End 33 Deformation section 34 Pressure surface 35 Base body 35" Base body 36 Projection 50 Securing element 51 Material section 52 Pressure surface 58 Pressure edge 100 Tube 110 Protrusion 120 Length section 130 End 140 Further protrusions Insertion direction D1 Wall thickness D2 Wall thickness

Claims

1. Connection device (1) for connecting a pipe (100) having an outer peripheral projection (110), comprising: a connection part (10) having a socket (11), in order to plug a longitudinal portion (120) of the pipe (100) having the projection (110) therein, wherein the socket (11) has a central axis (13) running in a plugging direction (E) and is bordered peripherally by a peripheral wall (15) running around the central axis (13), wherein the socket (11) further has a floor area (16.1) arranged transversely to the central axis (13), in order to bring the projection (110) of the pipe (100) into contact with this; a ring element (30), which is configured to be introduced into the socket (11) in an intermediary chamber (3) between the peripheral wall (15) of the socket (11) and the pipe (100) in such a way that an axial end (31) of the ring element (30) acts as a barrier for the projection (110) in order to secure the pipe (100) from moving out of the socket (11); a securing part (50) which is allocated to the connection part (10) and has at least one material portion (51), wherein the material portion (51) has a malleable material or consists thereof and is configured to be brought into a barrier position by means of a deformation, in order to form a barrier against the ring element (30) moving out of the socket (10), wherein the material portion (51) has or consists of a material that can be remoulded, and is configured to be brought into the barrier position by means of a remoulding, and wherein the material portion (51) is formed on an axial longitudinal portion (15.1) of the peripheral wall (15) of the socket (11), characterised in that the peripheral wall (15) of the socket (11) has a wall thickness (D1) in a region of the axial longitudinal portion (15.1) which is smaller than the wall thickness (D2) of the peripheral wall (15) in an adjacent axial longitudinal portion (15.2), which extends in the direction of the floor area (16.1).

2. Connection device according to claim 1, wherein the material portion (51) is formed all around the central axis (13) of the socket (11).

3. Connection device according to claim 1 or 2, wherein the ring element (30") has a radially outward protrusion (36), which can be moved elastically and / or can be deformed elastically in the axial direction of the ring element (30") and is allocated to an axial portion of the ring element (30"), which, with a introduced ring element (30"), is located in the intermediary chamber (3) between the peripheral wall (15) of the socket (11) and the pipe (100), such that the material portion (51) of the securing part (50) is brought into the barrier position against the force of the elastic protrusion (36).

4. Connection device according to one of the preceding claims, wherein the socket (11) has a radial indentation (17) running around the central axis (13) in the region of the floor area (16.1), and wherein the ring element (30) is configured to be introduced into the socket (11) in the intermediary chamber (3) between the peripheral wall (15) of the socket (11) and the pipe (100) in such a way that an axial end (31) of the ring element (30) presses against the projection (110) of the pipe (100), in order to cause a remoulding of the projection (110) under the influence of remoulding material into the indentation (17) of the socket (11).

5. Connection device according to one of the preceding claims, wherein the ring element (30) has a pressing surface (34) running transversely to the central axis (13), and the connection part (10) has a counter surface (18) running transversely to the central axis (13), wherein the counter surface (18) is configured to be used as a counter bearing surface for a pressure device, in order to exert a pressing force acting in the plugging direction (E) on the pressing surface (34) of the ring element (30).

6. Connection device according to one of the preceding claims, wherein the securing part (50) has a pressing surface (52) and / or a pressing edge (58), in order to cause the deformation of the material portion (51) by exerting a pressing force thereon to form the barrier, and wherein a counter surface (18) is provided which is configured to be used as a counter bearing surface for a pressure device, in order to exert the pressing force on the pressing surface (52) and / or the pressing edge (58).

7. Connection device according to one of the preceding claims, wherein the connection part (10) has a coupling point (19) that can be fluidically connected to the socket (11), in order to couple the connection part (10) to a connection of a further device.

8. Connection device according to one of the preceding claims, wherein the connection device (1) is formed as a connector for connecting the ends of two pipes to the projection, and wherein the connection part (10) has a further socket fluidically connected to the socket (11), and a further ring element interacting with the further socket is provided.

9. Connection arrangement having a connection device (1) according to one of claims 1 to 8 and a pipe (100) connected thereto having an outer peripheral projection (110), in particular a corrugated pipe.

10. Use of a connection device (1) according to one of claims 1 to 8 for connecting a pipe (100) having an outer peripheral projection (110), in particular of a corrugated pipe.

11. Use of a connection device (1) according to one of claims 1 to 8 for connecting a pipe (100) having a device carrying out a technical process, in order to supply a fluid to the device via the pipe (100) or to dissipate a fluid from the device.

12. Method for installing a pipe (100) having an outer peripheral projection (110) on a connection part (10), comprising the steps of: i) providing a connection device (1) according to one of claims 1 to 8; ii) plugging a longitudinal portion (120) of the pipe (100) having the projection (110) into the socket (11) of the connection part (10) of the connection device (1); iii) introducing the ring element (30) of the connection device (1) into an intermediary chamber (3) between the peripheral wall (15) of the socket (11) and the pipe (100), such that an axial end (31) of the ring element (30) acts as a barrier for the projection (110), in order to secure the pipe from moving out of the socket (11); iv) remoulding the material portion (51) of the securing part (50) of the connection device (1) from a starting shape into a blocking shape, wherein, in the start shape, a plugging opening (14) used for plugging in the pipe (100) is released and, in the blocking shape, the plugging opening (14) is blocked, such that there is a barrier against the ring element (30) moving out of the socket (11).

13. Method according to claim 12, wherein, in step ii), the ring element (30) is introduced into the intermediary chamber (3) between the peripheral wall (15) of the socket (11) and the pipe (100) in such a way that an axial end (31) of the ring element (30) presses against the projection (110) of the pipe (100), in order to cause a remoulding of the projection (110).