Fluid coupling arrangement for sealing the connection of a hose to a pressurized fluid line such as a drinking water line.

Abstract

The invention relates to a fluid coupling arrangement 1 for sealingly connecting a hose 40 to a pressurized fluid line 50, such as a drinking water line. It is provided with at least one open elastic ring 10 for supporting the hose 40, the outer diameter of which corresponds to the inner diameter of the hose 40. It further comprises a coupling part 20, which includes a ring of inwardly chamfered, spring-elastic tongues 21 and a clamping element 22, which interacts with the ring of spring-elastic tongues 21 and is suitable for clamping the hose 40 between the tongues 21 and the open ring 10. It also includes a rubber-elastic, fluid-tight hose element 30, which is suitable and designed to enclose one end of the hose 40 to be connected in a U-shaped and ring-shaped manner, thus sealing it. This fluid coupling arrangement 1 proves to be very robust, seals very well and is advantageous in handling.

Description

[0001] The invention relates to a fluid coupling arrangement for sealing the connection of a hose to a pressurized fluid line such as a drinking water line.

[0002] Pressurized fluid lines can transport various fluids, including gaseous and liquid substances. Examples of liquid substances include drinking water and oils. These fluids are regularly pressurized, ensuring the flow of fluids, such as drinking water, through the line. These pressurized fluid lines require regular maintenance and repair because the pressure can quickly lead to significant fluid losses, environmental damage, and substantial costs if a leak occurs.

[0003] There are numerous methods for maintaining and thus rehabilitating the underground infrastructure of supply and disposal lines. These methods are necessary to repair age-related damage to pipelines and sewers. Trenchless pipe rehabilitation, which, unlike open-cut construction, does not require the disruption of roads or sidewalks, has proven particularly effective. Here, liners, known as inliners, are inserted into the deteriorated pipes and used as a replacement for the damaged section. These liners either lie directly against or largely against the inner wall of the pipe being rehabilitated, or they can be positioned with some lateral movement within the pipe's interior.

[0004] Furthermore, fabric-reinforced, permanently flexible plastic hoses, as well as, depending on the application, hardening hoses that press against the old, damaged pipe wall under pressure and cure there within several hours, have proven effective as liners. A problematic aspect of this type of pipe rehabilitation, which involves inserting hoses into the pipe to be repaired, is the area where the liner (i.e., the flexible hose) meets the rigid fluid line. This transition proves difficult to manage and, in particular, to keep securely and reliably sealed, as flexible structures meet rigid structures, and different materials with varying mechanical properties and dimensions come into contact.

[0005] For sewer systems, i.e., non-pressurized pipes, sealing sleeves for local insertion into the pipe system requiring repair have proven effective for rehabilitation. German Utility Model DE 20 2016 104 723 U1 discloses a sealing sleeve for insertion into a pipe system to seal a leak. This sleeve consists of an annularly bent, expandable steel sheet whose inner and outer ends overlap circumferentially. It is equipped with at least one locking device in the form of a slot arranged circumferentially in the steel strip, with at least one row of teeth and at least one locking element capable of engaging in at least one row of teeth.Furthermore, at least one locking element has a carrier equipped with several spring elements that are elastically resilient and pivotably mounted against the carrier, and are suitable for engaging in a locking manner with at least one row of teeth. This sealing sleeve represents an easy-to-use locking device whose locking action depends very specifically on the materials selected and the dimensions of the spring elements.

[0006] Another such sealing sleeve for local insertion into the depressurized pipeline system requiring rehabilitation – wastewater system or sewer – is known from WO 2019158160 A1. This shows a snap-locking device arranged on the outside of the band bent into a ring, which enables a smooth inner surface along which the wastewater flows. This prevents blockages and ensures the long-term functionality of the rehabilitated depressurized pipeline system.

[0007] International patent application WO 00 / 60269A1 discloses a coupling component for a fluid coupling arrangement, in particular a hose coupling, as well as a fluid coupling arrangement for connecting water hoses. Here, two hoses are connected to each other by means of a coupling arrangement. The hose coupling arrangement has two coupling components that can be separated by inserting them into a coupling position and released from each other by pulling them apart. The connection between a coupling component and a hose end is achieved by means of inwardly chamfered, spring-elastic tongues arranged in a ring. These tongues are moved radially inwards when a sleeve is axially pushed onto the base body, thus fixing the hose at its end.

[0008] FRIAGRIP flange adapters are known for creating a fluid-tight connection between a hose and a rigid, solid drinking water pipe. These flange adapters are longitudinally force-locking fittings made of ductile iron for securely connecting different pipe materials during repairs, transitions, and fitting replacements. Further information can be found at the following web address: https: / / www.aliaxis.de / de / produkte / productdetails / friagripflanschadapter-eu-stu-416494. These flange adapters have proven to be insufficiently tight and their handling could be improved.

[0009] The invention is based on the objective of providing a fluid coupling arrangement for sealing the connection of a hose to a pressurized fluid line, in particular a drinking water line, which enables a reliable and tight connection and is as easy to handle as possible.

[0010] This problem is solved by a fluid coupling arrangement for sealing the connection of a hose to a pressurized fluid line having the features of claim 1.

[0011] Advantageous further developments of the fluid coupling arrangement for sealing the connection of a hose with a pressurized fluid line are the subject of the dependent claims.

[0012] The fluid coupling arrangement according to the invention for sealing a hose with a pressurized fluid line, such as a drinking water line, comprises at least one open elastic ring for supporting the hose, the outer diameter of which corresponds to the inner diameter of the hose. Such an open elastic ring is a closed ring with a slot, which ensures that the ring is not continuous and can be stretched with limited forces due to the slot, thereby widening the slot and thus increasing the radius of the open ring. Similarly, by overlapping the ends of the open ring, the radius can be reduced, and the ring in this state can be inserted particularly easily into a pipe or hose with an inner diameter corresponding to the open ring's abutting ends.If the open ring is stretched from its overlapping state until the ends meet or the slit widens, this open ring lies tightly against the hose to be joined. Upon relaxation, it can shrink again until the ends meet, thus achieving a stable state. In this stable state, the open ring fits statically against the inner surface of the hose to be joined and can therefore absorb external forces, whether from the hose itself or from the outside.

[0013] The fluid coupling assembly is further equipped with a coupling part featuring a ring of inwardly angled, spring-elastic tongues and a clamping element that interacts with the ring of spring-elastic tongues and is designed to clamp the hose securely between the tongues of the ring and the open ring. These tongues of the ring can thus exert force on the hose from the outside, enabling the hose to be clamped in the area of ​​the open ring on the inside of the hose. The open ring acts as a counterweight against the external force acting on the hose, provided by the numerous tongues of the coupling part's ring. This interaction ensures efficient clamping, and therefore a connection and seal, between the coupling part and the hose being connected.

[0014] Furthermore, the fluid coupling assembly is equipped with a rubber-elastic, fluid-tight hose element, which is suitable and designed to enclose the end of the hose to be connected in a U-shape and ring-like manner. This arrangement of the hose element significantly improves the tightness of the fluid coupling assembly in the end region of the hose to be connected.

[0015] In addition to improved sealing, the fluid coupling assembly is also characterized by particularly advantageous and simple handling. On the one hand, the difficult fluid-tight connection to the hose is ensured via the open ring in conjunction with the tongues of the coupling part's ring and the hose element. On the other hand, the rigid, pressurized fluid line, especially a drinking water line, is connected via the rigid coupling part with appropriate fittings and seals. This is achieved in the usual manner, particularly by means of suitable screw connections and sealing rings.

[0016] In a preferred embodiment of the fluid coupling arrangement for sealing a hose to a pressurized fluid line, the at least one open, elastic ring has a width between 3 cm and 6 cm. This width allows for both easy handling and sufficient safety in forming the abutment due to the size of the abutting ends of the open ring. This is achieved even more effectively if the open ring is several millimeters thick, particularly at least 1.5 mm thick, especially in the area of ​​the ends.

[0017] In a preferred embodiment of the fluid coupling arrangement for sealing a hose with a pressurized fluid line, the arrangement comprises at least one annular sealing sleeve. This at least one annular sealing sleeve is suitable for insertion into the interior of the hose and has at least one locking device arranged on the outside.

[0018] Such a special sealing sleeve is known, for example, from DE 20 2016 104 723 U1 and WO 2019158160 A1, although this is intended for a different application area, namely the rehabilitation of non-pressurized wastewater pipes, and is therefore not suitable for independently sealing a pressurized fluid line such as a drinking water line.

[0019] This sealing sleeve is installed in the area of ​​the open ring inserted into the interior of the hose to be connected, in such a way that the sealing sleeve protects the open ring from damage caused by materials or fluid inside the hose. This largely prevents damage, displacement, or destabilization of the open ring, which acts as a support for the coupling component with its tongues. As a result, the desired seal is guaranteed even under difficult conditions and over extended periods. Furthermore, handling is ensured to be simple and safe.

[0020] In a preferred further development of the fluid coupling arrangement for sealing a hose to a pressurized fluid line, the arrangement is designed with at least one annular sealing sleeve, wherein the sealing sleeve is smooth on the inside and / or has low flow resistance, in particular without points or hooks. This makes it possible to keep the flow resistance of the pressurized fluid, such as drinking water in the water line, low, or to prevent the formation of unnecessary turbulence, which can lead to damage in the line, especially in the area of ​​the open ring. At least, it reduces the turbulence. This further improves the robustness of the system.

[0021] In a preferred embodiment of the fluid coupling arrangement for sealing a hose to a pressurized fluid line, the arrangement is provided with at least one annular sealing sleeve, which has at least one snap-action, self-locking device on its outer surface. This locking device allows the sealing sleeve to be snapped into place when it is stretched against the hose from the inside – also known as an liner – thereby fixing or stabilizing the area of ​​the open ring with the sealing sleeve. Thus, the robustness of the connection is improved by means of the fluid coupling arrangement.

[0022] In a preferred embodiment of the fluid coupling arrangement for sealing a hose to a pressurized fluid line, the fluid coupling arrangement comprises at least one annular sealing band that abuts the outside of the at least one sealing sleeve in a sealing manner and encloses it. The sealing band(s) prevent the unintentional ingress of fluid from the hose, for example, drinking water, towards the open ring, thus improving the protection of the open ring and, consequently, the functionality of the fluid coupling arrangement. In particular, the at least one open ring is enclosed by the sealing band in that a side portion of the sealing band completely surrounds the open ring on both sides, and the central portion of the sealing band elastically abuts the open ring in a sealing manner over its entire circumference.This sealing effect is achieved by pressing the sealing sleeve against the sealing tape and thus towards the open end of the tape on the inside of the hose. Alternatively, several sealing tapes can be used, with one part positioned on one side of the sealing tape and another part on the other side, extending along the entire circumference of the sealing tape and the open end, respectively. Using multiple sealing tapes distributed on both sides of the open end particularly improves the handling of the fluid coupling assembly and the protection of the open end.

[0023] In a preferred embodiment of the fluid coupling arrangement for sealing the connection of a hose to a pressurized fluid line, the at least one open ring is designed separately from the coupling part and thus constitutes a separate element of the fluid coupling arrangement. This separate design allows the open ring to be positioned and handled independently of the coupling part within the hose to be connected, resulting in a particularly flexible and easy-to-handle fluid coupling arrangement.

[0024] In a preferred embodiment of the fluid coupling arrangement for sealing the connection of a hose to a pressurized fluid line, at least one open ring is provided with a straight slot, which in particular runs approximately perpendicular to the circumferential direction. The provision of a straight slot, which opens the closed ring and thereby forms two ends of the open ring, facilitates simple handling and manufacturing of the open ring and thus of the fluid coupling arrangement. Even with a slight misalignment of the two ends of the open ring relative to each other, sufficient stability of the ring is still ensured by the overlapping surface, thus guaranteeing its function as a bearing for the coupling component.

[0025] In a preferred embodiment of the fluid coupling arrangement for sealing the connection of a hose to a pressurized fluid line, at least one open ring has a serrated slot. This serrated slot is preferably designed as a wedge-shaped, and thus V-shaped, slot, which is oriented circumferentially. This serrated, and in particular wedge-shaped, form of the slot advantageously increases the contact area of ​​the ends and, moreover, ensures secure and reliable positioning of the ends of the open ring relative to each other by means of the centering effect of the wedge or serration structure, resulting in a very effective abutment for the tongues of the coupling element.Thus, it is possible to ensure both a particularly effective clamping effect for the hose to be connected and particularly good handling, especially in the event of an undesired lateral offset of the ends of the open ring to each other.

[0026] In a preferred embodiment of the fluid coupling arrangement for sealing a hose with a pressurized fluid line, the at least one open ring is formed from an inert, solid material, in particular essentially from steel or stainless steel. This makes it possible to ensure the tightness of the fluid coupling arrangement over longer periods.

[0027] In a preferred embodiment of the fluid coupling arrangement for sealing a hose to a pressurized fluid line, the rubber-elastic, fluid-tight hose element is positioned between the at least one open ring and the inside of the hose. By inserting the hose element between the open ring and the hose to be connected, the sealing effect between the open ring and the hose is improved, and lateral ingress of fluid from the interior of the hose between the inside of the hose and the open ring is prevented. This ensures that the fluid coupling arrangement remains leak-tight for extended periods. In particular, the risk of fluid ingress into the hose through its end face is significantly reduced, especially in the case of fabric-reinforced plastic hoses.

[0028] In a preferred embodiment of the fluid coupling arrangement for sealing the connection of a hose to a pressurized fluid line, the coupling part has a sealing surface which, when connected to the hose, bears in a sealing manner against the outside of the hose element. The sealing surface on the coupling part is preferably arranged such that it is located in the region of the end face of the hose or in the region of the outside of the hose, always ensuring that the hose element is positioned and inserted in a sealing manner for the fluid between the hose to be connected and the coupling part.Especially in conjunction with the arrangement of the hose element between the open ring and the inside of the hose as an additional sealing surface, it is possible to prevent the fluid from penetrating between the two sealing surfaces and thus, in particular, into the hose or the fabric of the reinforced hose. This significantly improves the hose's stability and therefore its service life. This results in a permanent and effective sealing connection between the hose and the fluid line using the fluid coupling arrangement.

[0029] In a preferred embodiment of the fluid coupling arrangement for sealing the connection of a hose to a pressurized fluid line, the coupling part has a hollow cylindrical central element that extends parallel to the longitudinal axis and parallel to the ring of tongues, and is suitable for insertion into the end region of the hose to be connected. This hollow cylindrical central element of the coupling part guides the fluid in the area between the end of the rigid fluid line and a region in the hose to be connected by means of the channel formed by the cavity of the cylindrical central element. The free end of the hollow cylindrical central element is spaced apart from the hose end.Preferably, the free end terminates in the region of the open ring or sealing sleeve, allowing a substantially unimpeded fluid flow into the area behind the open ring or sealing sleeve. Alternatively, the hollow cylindrical central element can also project beyond the sealing sleeve or the open ring. Preferably, the outer diameter of the hollow cylindrical central element corresponds approximately to the inner diameter of the open ring or sealing sleeve, so that the fluid flow is impeded as little as possible. In particular, this prevents turbulence that could lead to damage to the installed assembly.

[0030] In a preferred embodiment of the fluid coupling arrangement for sealing a hose to a pressurized fluid line, the hose element and / or at least one sealing strip is made of ethylene propylene diene monomer (EPDM), ethylene propylene diene monomer (EPM), natural rubber (NR), nitrile butadiene rubber (NBR), silicone, or styrene butadiene rubber (SBR). This ensures a durable seal and good handling due to the special rubber-elastic properties of the material of the elastic sealing strip and / or the hose element.

[0031] The fluid coupling arrangement according to the invention for sealing the connection of a hose with a pressurized fluid line will be explained in more detail below with reference to the exemplary examples selected and shown in the figures.

[0032] The invention is not limited to the embodiments shown by way of example in the drawings.

[0033] They show: Fig. 1 A schematic view of an exemplary fluid coupling arrangement for sealing the connection of a hose to a pressurized fluid line in a longitudinal section and Fig. 2 a schematic view of the fluid coupling arrangement Fig. 1 in a cross-section.

[0034] In Fig. Figure 1 shows an exemplary fluid coupling arrangement 1 for sealing the connection of a hose 40 to a pressurized fluid line 50 in a longitudinal section. The hose 40 is designed as a flexible, fabric-reinforced plastic hose, also known as a liner, which is used for the rehabilitation of drinking water pipes. The pressurized fluid line 50 is a rigid, solid fluid line 50 made of clay and is provided at its end with a connecting flange 51. Using the connecting flange 51, it is possible to connect and thus link other fluid lines with appropriately designed connecting flanges in a fluid-tight manner.

[0035] Using the fluid coupling arrangement 1, it is possible to connect different types of lines, namely the hose 40 fluid-tight and securely, with the fixed fluid line 50.

[0036] The exemplary fluid coupling arrangement 1 is provided with an open elastic ring 10 for supporting the hose 40, the outer diameter of the open ring 10 corresponding to the inner diameter of the hose 40. Such an open elastic ring 10 is a closed ring with a slot 11, which ensures that the ring is not continuous and can be stretched with limited forces due to the slot 11, thereby widening the slot 11 and thus increasing the radius of the open ring 10. Similarly, by overlapping the ends of the open ring 10, the radius can be reduced, and the ring 10 in this state can be particularly easily inserted into a pipe 50 or a hose 40 with an inner diameter corresponding to the state of the open ring 10 with abutting ends.If the open ring 10 is stretched from its overlapping state until the ends abut or the slot 11 is widened, this open ring 10 lies tightly against the inner surface of the hose 40 to be joined and can shrink again upon relaxation until the ends abut and a stable state is achieved. In this stable state, the open ring 10 rests forcefully against the inner surface of the hose 40 to be joined and can thus statically and therefore stably absorb external forces, whether from the hose 40 or from the outside.

[0037] The fluid coupling assembly 1 is further equipped with a coupling part 20, which has a ring of inwardly chamfered, spring-elastic tongues 21 and a clamping element 22 in the form of a sleeve 22. The clamping element 22 interacts with the ring of spring-elastic tongues 21 and is suitable for clamping the hose 40 between the tongues 21 of the ring and the open ring 10. These tongues 21 of the ring can thus exert force on the hose 40 from the outside, enabling the hose 40 to be clamped in the area of ​​the open ring 10 on the inside of the hose 40. The open ring 10 forms a counter-bearing against the external force acting on the hose 40 through the multitude of tongues 21 of the ring of the coupling part 20. This interaction ensures efficient clamping and thus a connection and seal between the coupling part 20 and the hose 40 to be connected.

[0038] Furthermore, the fluid coupling assembly 1 is provided with a rubber-elastic, fluid-tight hose element 30, which is suitable and designed to enclose the end of the hose 40 to be connected in a U-shape and ring-like manner. This arrangement of the hose element 30 significantly improves the tightness of the fluid coupling assembly 1 in the end region of the hose 40 to be connected.

[0039] In addition to the improved sealing of the fluid coupling assembly 1, it is also characterized by particularly advantageous and simple handling. On the one hand, the difficult fluid-tight connection to the hose 40 is ensured via the open ring 10 in conjunction with the tongues 21 of the ring of the coupling part 20 and the hose element 30. On the other hand, the connection of the rigid, pressurized fluid line 50, in particular the drinking water line 50, via the coupling part 20 with corresponding connections and seals is achieved in the usual manner, in particular by means of appropriate screw connections 52 and sealing rings.

[0040] When the sleeve 22 is screwed onto the thread 23 between the sleeve 22 and the holder 24 of the coupling part 20, the tongues 21 of the coupling part 20 are pressed inwards towards the hose 40 against the inwards angled, spring-elastic tongues 21, ensuring that the hose 40 is pressed against the resistance of the open ring 10, which forms a support, and thus fixed in place.

[0041] If the sleeve 22, which forms the clamping element 22, is unscrewed from the thread 23, the pressure on the tongues 21 is reduced, thereby reducing the clamping effect of the tongues 21 on the hose 40 and thus reducing or eliminating the fixation of the hose relative to the fluid coupling arrangement 1.

[0042] The fluid coupling arrangement 1 for sealing a hose 40 with a pressurized fluid line 50 features an open, elastic ring 10 with a width of approximately 6 cm. This width allows for both easy handling and sufficient safety in forming the abutment due to the size of the abutting ends of the open ring 10. This is achieved particularly effectively because the open ring 10 is approximately 2 mm thick at its ends.

[0043] The fluid coupling assembly 1 is provided with an annular sealing sleeve 60, which has at least one snap-action, self-locking device on its outer surface. This locking device allows the sealing sleeve 60 to be snapped into place when it is stretched against the hose 40 (also called an liner) from the inside, thereby fixing or stabilizing the area of ​​the open ring 10 with the sealing sleeve 60. Thus, the robustness of the connection is improved by means of the fluid coupling assembly 1. The sealing sleeve 60 is smooth on its inner surface and / or has low flow resistance, in particular without any points or hooks.This makes it possible to keep the flow resistance of the pressurized fluid, such as drinking water in the water pipe 40, 50, low, or to prevent the formation of unnecessary turbulence that could lead to damage in the hose 40, particularly in the area of ​​the open ring 10. At least, it reduces the turbulence. This further improves the robustness of the fluid coupling arrangement 1.

[0044] The fluid coupling arrangement 1 comprises two annular sealing bands 61 that abut and enclose the outer surface of the sealing sleeve 60. Furthermore, the sealing bands 61 abut the inner surface of the hose 40, or the rubber-elastic hose element 30, creating a fluid-tight seal. The sealing bands 61 prevent the unintentional ingress of fluid from the hose 40, for example, drinking water, towards the open ring 10, thus improving the protection of the open ring 10 and, consequently, the functionality of the fluid coupling arrangement 1. The open ring 10 is enclosed on both sides by the two sealing bands 61. This sealing effect is achieved by pressing the sealing sleeve 60 against the sealing bands 61 and thus towards the open ring 10 on the inner surface of the hose 40.The use of several sealing strips 61 distributed on both sides of the open ring 10 makes handling the fluid coupling arrangement 1 and protecting the open ring 10 particularly easy.

[0045] In the fluid coupling arrangement 1 for sealing the connection of a hose 40 with a pressurized fluid line 50, one open ring 10 is designed separately from the coupling part 20 and thus constitutes a separate element of the fluid coupling arrangement 1. This separate design allows the open ring 10 to be positioned and handled independently of the coupling part 20 within the hose 40 to be connected, resulting in a particularly flexible and easy-to-handle fluid coupling arrangement 1.

[0046] The fluid coupling assembly 1 shows an open ring 10 with a straight slot 11 that runs perpendicular to the circumferential direction. By providing a straight slot 11, which opens the closed ring 10 and thus forms two ends of the open ring 10, the open ring 10, and consequently the fluid coupling assembly 1, can be easily handled and manufactured. Even with a slight misalignment of the two ends of the open ring 10 relative to each other, sufficient stability of the ring 10 is still ensured by the adequate overlap area, thus guaranteeing its function as a support for the tongues 21 of the coupling part 20.

[0047] In this arrangement, at least one open ring 10 is made of an inert, solid material, namely stainless steel. This ensures that the fluid coupling arrangement 1 remains leak-tight over extended periods.

[0048] In the illustrated fluid coupling arrangement 1 for sealing a hose 40 with a pressurized fluid line 50, the rubber-elastic, fluid-tight hose element 30 is positioned between the at least one open ring 10 and the inside of the hose 40. By inserting the hose element 30 between the open ring 10 and the hose 40 to be connected, the sealing effect between the open ring 10 and the hose 40 is improved, and lateral ingress of fluid from the interior of the hose 40 between the inside of the hose 40 and the open ring 10 is prevented. This ensures that the fluid coupling arrangement 1 remains leak-tight for extended periods. In particular, the risk of fluid ingress into the hose 40 through its end face is significantly reduced, especially in the case of fabric-reinforced plastic hoses 40.

[0049] In the illustrated fluid coupling arrangement 1, the coupling part 20 has a sealing surface 25 which, when connected to the hose 40, forms a seal against the outside of the hose element 30. The sealing surface 25 is positioned on the coupling part 20 such that it is located in the region of the end face of the hose 40. This ensures that the hose element 30 forms a seal for the fluid between the hose 40 to be connected and the coupling part 20. In conjunction with the arrangement of the hose element 30 between the open ring 10 and the inside of the hose 40, which also provides a sealing surface, the ingress of fluid between the two sealing surfaces, and thus into the hose 40 or the fabric of the reinforced hose 40, is prevented, thereby significantly improving the stability of the hose 40 and thus its service life.This results in a permanent and effectively sealing connection between the hose 40 and the fluid line 50 using the fluid coupling arrangement 1.

[0050] The fluid coupling arrangement 1 comprises a coupling part 20 with a hollow cylindrical central element 26, which is designed to extend parallel to the longitudinal axis and parallel to the ring of tongues 21 and is suitable for insertion into the end region of the hose 40 to be connected. This hollow cylindrical central element 26 of the coupling part 20 guides the fluid in the region between the end of the rigid fluid line 50 and a region in the hose 40 to be connected by means of the channel formed by the cavity of the cylindrical central element 26. The free end of the hollow cylindrical central element 26 is spaced apart from the hose end. The free end of the central element 26 terminates in the region of the open ring 10 and thus in the region of the sealing sleeve 60, enabling a substantially unimpeded fluid flow into the region behind the open ring 10 or the sealing sleeve 60.The outer diameter of the hollow cylindrical central element 26 corresponds approximately to the inner diameter of the open ring 10 or the sealing sleeve 60, so that the fluid flow is affected as little as possible. In this way, disruptive eddies in the fluid flow, which could lead to damage to the installed arrangement, can be prevented.

[0051] The hose element 30 and the sealing strips 61 are made of silicone. This ensures a durable seal and good handling due to the special rubber-elastic properties of the material of the elastic sealing strip 61 and / or the hose element 30.

[0052] In Fig. Figure 2 is schematically a cross-section through the fluid coupling arrangement 1 along line AA. Fig. 1 shown.

[0053] The following describes the various elements of the fluid coupling arrangement 1. Fig.2 explained in order from the inside out.

[0054] Inside is the sealing sleeve 60, which is ring-shaped and has a smooth inner surface without pronounced protrusions, allowing the fluid to flow through the sealing sleeve 60 in the enclosed interior without significant obstruction. The sealing sleeve 60 completely covers the outer open ring 10, which is spaced apart from the sealing sleeve 60. The covering of the sealing sleeve 60 protects the open ring 10, which acts as a counterweight against external forces.

[0055] The open ring 10 is adjoined to the outside by the rubber-elastic hose element 30, which is arranged to seal between the open ring 10 and the hose 40. This sealing effect prevents the fluid from penetrating laterally from the hose 40 between the hose element 30 and the hose 40 and, in particular, from reaching the open end of the hose 40 and the fabric within it. Such penetration would impair the stability of the hose 40 and potentially lead to damage to the hose 40, resulting in leaks or a complete loss of functionality of the hose 40 or the fluid line as a whole.

[0056] The open ring 10 has a width of approximately 6 cm and a material thickness of approximately 2 mm, as well as a straight slot 11, which provides effective resistance against external forces to achieve the desired sealing effect. These dimensions also ensure good handling even under difficult conditions.

[0057] The hose 40 is enclosed by a ring of several tongues 21, which are pressed with varying force towards the hose 40 in the area of ​​the open ring 10, depending on the position of the clamping element 22. This pressing force is counteracted by the opposing force of the support from the open ring 10 in conjunction with the hose 40 or the rubber-elastic hose element 30. This interaction produces the desired sealing effect, which essentially determines the durability and ease of handling of the described fluid coupling arrangement 1. Reference symbol list: 1 Fluid coupling arrangement for sealing the connection of a hose to a pressurized fluid line 10 Open Ring 11 slots 20 Clutch part 21 Tongue 22 Sleeve 23 threads between sleeve and holder of the coupling part 24 Stop element of the coupling part 25 sealing surface 26 Hollow cylindrical central element 30 Rubber-elastic hose element 40 hose 41 End surface of the hose 50 Fixed fluid line 51 Connecting flange of the fluid line 52 Screw connection between connecting flange and stop element of the coupling part 60 sealing sleeves 61 sealing tape QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 20 2016 104 723 U1 [0005, 0018] WO 2019158160 A1 [0006, 0018] WO 00 / 60269A1

[0007]

Claims

[1] Fluid coupling arrangement (1) for sealing connection of a hose to a pressurized fluid line such as a drinking water line, comprising at least one open elastic ring for supporting the hose, the outer diameter of which corresponds to the inner diameter of the hose, a coupling part comprising a ring of inwardly chamfered spring-elastic tongues and a clamping element which cooperates with the ring of spring-elastic tongues and is suitable for clamping the hose between the tongues of the ring and the open ring, and a rubber-elastic, fluid-tight hose element which is suitable and provided for enclosing one end of the hose to be connected in a U-shape and ring-shaped manner. [2] Fluid coupling arrangement (1) for sealing a hose with a pressurized fluid line according to claim 1, characterized by, that the at least one open elastic ring has a width between 3 cm and 6 cm and is in particular several mm thick, especially at least 1.5 mm thick. [3] Fluid coupling arrangement (1) for sealing a hose with a pressurized fluid line according to claim 1 or 2, characterized by , that the arrangement includes at least one annular sealing sleeve (10), wherein the at least one annular sealing sleeve is suitable for insertion into the interior of the hose and wherein the at least one sealing sleeve has at least one locking device arranged on the outside. [4] Fluid coupling arrangement (1) for sealing a hose with a pressurized fluid line according to claim 3, characterized by , that the at least one annular sealing sleeve (10) is provided with at least one locking, self-locking device. [5] Fluid coupling arrangement (1) for sealing a hose with a pressurized fluid line according to claim 3 or 4, characterized by , that at least one annular sealing sleeve (10) is smooth on the inside and / or has little flow resistance, in particular without points or hooks. [6] Fluid coupling arrangement (1) for sealing a hose with a pressurized fluid line according to any one of claims 3 to 5 above, characterized by , that the fluid coupling arrangement (1) has at least one annular sealing band which abuts the outside of the at least one sealing sleeve (10) in a sealing manner and surrounds it, wherein in particular the at least one open ring is enclosed or laterally enclosed by the sealing band(s). [7] Fluid coupling arrangement (1) for sealing a hose with a pressurized fluid line according to one of the preceding claims, characterized by that at least one open ring is designed separately from the coupling part. [8] Fluid coupling arrangement (1) for sealing a hose with a pressurized fluid line according to one of the preceding claims, characterized by that the at least one open ring has a straight slit, which in particular runs approximately perpendicular to the circumferential direction. [9] Fluid coupling arrangement (1) for sealing connection of a hose with a pressurized fluid line according to any one of the preceding claims 1 to 7, characterized by , that the at least one open ring has a jagged slot, in particular a wedge-shaped slot, which is oriented in the circumferential direction. [10] Fluid coupling arrangement (1) for sealing a hose with a pressurized fluid line according to one of the preceding claims, characterized by that the at least one open ring is formed of inert, solid material, in particular essentially of steel or stainless steel. [11] Fluid coupling arrangement (1) for sealing a hose with a pressurized fluid line according to one of the preceding claims, characterized by , that the rubber-elastic, fluid-tight hose element is arranged between the at least one open ring and the inside of the hose. [12] Fluid coupling arrangement (1) for sealing a hose with a pressurized fluid line according to one of the preceding claims, characterized by that the coupling part has a sealing surface which, when connected to the hose, rests in a sealing manner on the outside of the hose element. [13] Fluid coupling arrangement (1) for sealing a hose with a pressurized fluid line according to one of the preceding claims, characterized by that the coupling part has a hollow cylindrical central element which is designed to run parallel to the longitudinal axis and parallel to the ring of tongues and is suitable for being inserted into the end area of ​​the hose to be connected. [14] Fluid coupling arrangement (1) for sealing a hose with a pressurized fluid line according to one of the preceding claims, characterized by that the hose element and / or at least a sealing strip are made of ethylene propylene diene monomer rubber (EPDM), ethylene propylene monomer rubber (EPM), natural rubber (NR), nitrile butadiene rubber (NBR), silicone or styrene butadiene rubber (SBR).

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