HOSE ARRANGEMENT AND METHOD FOR FORMING A HOSE CONNECTION

Description

[0001] The invention relates to a hose arrangement comprising a hose according to claim 1.

[0002] The invention further relates to a method for forming a hose connection.

[0003] Hose assemblies of the type mentioned above are known per se and are used to form hose connections between an inlet and an outlet between which no straight connection can be established. The at least one bending section thus allows the hose to be bent without squeezing it and / or excessively restricting the volume flow through the hose in the bending area. The push-on section serves to establish a connection between the hose and a connecting element by pushing the hose onto the connecting element. To prevent accidental separation between the connecting element and the hose, the connection can be secured with an outer sleeve, in particular a crimp sleeve.

[0004] DE 20 2006 005545 U1 describes a fluid line, in particular for use in motor vehicles for supplying liquid for cleaning motor vehicle windows or for cleaning motor vehicle headlights, comprising: - a flexible conduit with at least one corrugated pipe section and at least one smooth pipe section adjoining the corrugated pipe section, - at least one line connector with a conduit connection section which is inserted into a smooth pipe section, - for each line connector a support sleeve which surrounds the smooth pipe section receiving the conduit connection section and presses the smooth pipe section against the conduit connection section.

[0005] A hose in US 5,829,483 A comprises an outer hose element and an inner hose element. The outer hose element comprises a first bellows-like tubular portion at least in the intermediate region in the axial direction. The inner hose element is arranged substantially coaxially in the outer hose element, comprises a second bellows-like tubular portion in the region corresponding to the first bellows-like tubular portion of the outer hose element, and is adapted to form a tubular air layer between the second bellows-like tubular portion and the first bellows-like tubular portion. Due to the outer hose element and the inner hose element, the hose has high flexibility, a reliable barrier ability against gasoline fuels or the like, and improved adiabatic ability and flammability for the inner hose element.

[0006] In DE 10 2016 008111 A1 it is proposed that a hose connection has a crimp sleeve which is divided into successive segments along its circumference, wherein a rotational symmetry of the crimp sleeve about a longitudinal axis is less than if the segments were all formed with a matching cross-sectional shape.

[0007] US 2018 / 135781 A1 describes a coaxial hose for electrostatic oil systems, comprising a flexible outer tube and a flexible inner tube for the circulation of a second fluid within its interior. The inner tube, together with the outer tube, forms an annular space for the circulation of a first fluid. The inner tube contains an inner layer made of PTFE to contain the second fluid, an inner braid to provide pressure resistance to the inner tube, and an outer layer made of polyamide material to prevent the first fluid from passing through the braid. The outer tube is made of PTFE with a corrugated structure. The hose includes a second braid made of knitted metal wire that surrounds the outer tube. The inner tube is placed over a sealing end of a pipe for the supply or discharge of the second fluid. An outer element receives the pipe in a through-bore at one end.A sealing section of the outer element allows the assembly of the outer tube and the second braid.

[0008] DE 20 2011 100788 U1 describes a hose arrangement for a water-conducting system, with a flexible pressure hose and a connecting piece arranged at one end of the pressure hose, wherein the connecting piece has at least one hose nipple engaging in the pressure hose and a crimp sleeve enclosing the pressure hose on the outside, and wherein the pressure hose is held between the hose nipple and the crimp sleeve in a force-fitting and / or form-fitting manner, characterized in that the crimp sleeve projects beyond the hose nipple at its hose-side nipple end in the direction of extension of the pressure hose with a sleeve section and that the crimp sleeve forms a radially inwardly directed projection in the sleeve section, which radially loads and displaces the pressure hose in such a way thatthat the clear inner diameter of the pressure hose in the area of ​​the sleeve section is approximated or adjusted to the clear inner diameter of the hose nipple compared to the clear inner diameter of the relaxed pressure hose.

[0009] However, it has proven to be disadvantageous that previously known hose arrangements and / or hose connections made from them often produce a noise development that is often perceived as very unpleasant, for example due to flow turbulence within the hose.

[0010] The object is therefore to provide a hose arrangement of the type mentioned above with improved usage properties.

[0011] The solution to this problem is provided according to the invention by a hose arrangement having the features of claim 1.

[0012] According to the invention, a hose arrangement is proposed to achieve the object, wherein an inner diameter (6) of a cross section of the at least one bending section (3) is not greater than an inner diameter (7) of a cross section of the at least one connecting element (5), wherein the connecting element (5) has a stop (17) up to which the hose (2) is plugged onto the connecting element (5) in the position of use, and wherein the at least one bending section (3) has a stop (18) which is acted upon by the connecting element (5) in the position of use.

[0013] The term "tuned," as used in the claims, can be understood within the meaning of the invention as equal and / or with a deviation of + / - 5%, in particular + / - 10%, in particular + / - 15%. Furthermore, if the term "tuned" is used multiple times, it does not necessarily have to be interpreted the same way in each case, but can be interpreted within the aforementioned limits with respect to the respective feature.

[0014] A "connecting element" in the sense of the invention can be understood as a connecting section of a fluid line, such as a nipple and / or a fitting.

[0015] If the inner diameters are the same size, it is possible to avoid a step in both directions of a flow.

[0016] If the (minimum) inner diameter in the bending section is smaller than the inner diameter in the push-on section, the inner diameter in the push-on section should be selected as large as possible. This is beneficial for ensuring the lowest possible flow resistance through the connecting element.

[0017] Advantageous embodiments of the invention are described below, which can be combined with the features according to claim 1.

[0018] According to an advantageous development, it can be provided that the at least one plug-on section has a constant inner and / or a constant outer diameter and / or is cylindrical. This makes it possible to design the plug-on section in such a way that a particularly stable and / or tight connection with the connecting element is possible. Preferably, a particularly stable positive and / or non-positive, in particular frictional, connection can thus be formed between the plug-on section and the connecting element.

[0019] According to the invention, the at least one bending section is formed in a corrugated manner. Additionally, a wall of the bending section can have indentations. This makes it possible to bend the hose at an angle in the bending area, in particular without squeezing the hose and / or without reducing the clear opening cross-section of the hose or reducing it by more than 50%. Furthermore, the forces acting on the wall during bending can be reduced, thus reducing the risk of breakage.

[0020] According to an advantageous development, the hose can be provided with a preferably repeating sequence of multiple bending sections and / or multiple plug-on sections. In particular, one section of the sequence can be formed from a bending section and a plug-on section. This has the advantage that the hose can be cut to a desired length. Furthermore, waste and / or rejects can be completely avoided.

[0021] In order to create a sufficiently stable connection between the hose and the connecting element, the axial length of a plug-on section can be at least twice as long as the length of a connecting section of the connecting element. This makes it possible to divide an undivided plug-on section into two partial plug-on sections, each suitable for establishing a connection with the connecting element, when cutting to length. In particular, two equally sized partial plug-on sections can be formed from an undivided plug-on section, the respective axial lengths of which correspond at least to the axial length of the connecting section of the connecting element.

[0022] In one embodiment, it can be provided that a maximum outer diameter of the at least one bending section is not larger, in particular smaller, than an outer diameter of the at least one plug-on section. This makes it possible to make the outer diameter of the assembled hose arrangement uniform or at least nearly uniform. This has the advantage that, on the one hand, unpleasant noise development can be better avoided. On the other hand, it is also possible to nearly standardize the space requirements of the assembled hose arrangement.

[0023] According to a further advantageous development of the hose arrangement, an outer diameter of a connecting section of the connecting element, in particular of the aforementioned connecting section of the connecting element, can be matched to an inner diameter of the at least one plug-on section. Alternatively or additionally, the hose can be formed from at least one plastic material. This can result in the advantage that a frictional connection can be established between the connecting section of the connecting element and the hose.

[0024] According to the invention, the connecting element has a stop to which the hose is pushed onto the connecting element in the operating position. This allows the user to immediately determine whether the assembly has been carried out correctly.

[0025] In order to achieve particularly good flexibility of the hose, it can be provided that the at least one bending section has a sequence of indentations, in particular indentations of the same shape.

[0026] According to a further advantageous development of the hose arrangement, it can be provided that the at least one bending section is shorter than the at least one plug-on section. This ensures that the plug-on section is still sufficiently long, especially after the hose has been cut to length, to form a stable connection between the plug-on section and the connecting element.

[0027] According to the invention, the hose has a sheath. This sheath provides better protection for the hose against external influences.

[0028] In addition, according to a preferred embodiment, the connecting element can have an outer sleeve. Preferably, the inner diameter of the outer sleeve can be larger than the outer diameter of the casing. This makes it possible to guide the outer sleeve (fixing sleeve) over the casing. In an advantageous embodiment, the wall thickness of the connecting element in the region of the plug-on section can be no greater than the corrugation height of the bending section.

[0029] The wall thickness can be equal to the wave height, thus achieving the most seamless transition to the connecting element possible.

[0030] The wall thickness can even be smaller than the wave height. This avoids limiting the flow cross-section by the connecting element on which the plug-in section is formed.

[0031] The wave height can, for example, be characterized as a difference between a maximum outer diameter and a minimum inner diameter of the bending section.

[0032] The wave height can alternatively be characterized, for example, as a difference between a maximum inner diameter and a minimum inner diameter of the bending section.

[0033] The above-mentioned problem is further solved by a method having the features of the independent method claim.

[0034] To achieve the object, a method for forming a hose connection by using a hose arrangement as described and claimed herein is proposed.

[0035] According to the invention, a method is proposed, wherein a desired hose length is achieved by cutting the hose to length in a plug-on section, in particular exactly in the middle of the plug-on section, and wherein the cut-to-length plug-on section is plugged onto the connecting element.

[0036] According to a particularly advantageous embodiment, the sheathing can be severed together with the hose wall at the desired point when cutting to length.

[0037] The invention will now be described in more detail with reference to several exemplary embodiments, but is not limited to these exemplary embodiments. Further exemplary embodiments result from the combination of the features of several claims with one another and / or with individual or multiple features of the exemplary embodiments.

[0038] It shows: Fig. 1 shows a possible embodiment of a hose arrangement with a hose which has at least one bending section and at least one plug-on section, and with a connecting element onto which the plug-on section - as shown in the detailed view - can be plugged or is plugged, wherein an inner diameter of a cross section of the at least one bending section is matched to an inner diameter of a cross section of the at least one connecting element, Fig. 2 shows the steps of a possible embodiment of a method according to the invention for forming a hose connection, wherein a hose arrangement according to the invention is preferably used, Fig. 3 shows a finished hose connection which is produced with a hose arrangement according to the invention and / or according to the method according to the invention for forming a hose connection, Fig.Fig. 4 shows a further detailed view of a longitudinal section of a fully assembled hose connection formed by using a possible embodiment of a hose arrangement according to the invention, and Fig. 5 shows a further finished hose connection produced with a hose arrangement according to the invention and / or according to the method according to the invention for forming a hose connection.

[0039] Figures 1-5 each show a part of a possible embodiment of a hose arrangement according to the invention, which is designated as a whole as 1.

[0040] The hose arrangement 1 serves to form a hose connection 21.

[0041] The hose arrangement 1 has at least one hose 2 and one connecting element 5, which are connected to one another to form a hose connection 21 in the position of use.

[0042] Figure 1shows the connection between the hose 2 and the connecting element 5 in detail. The hose connection 21 can, for example, form part of a fluid line.

[0043] The hose 2 has at least two different sections 3, 4, which are referred to below as bending section 3 and plug-on section 4. The hose 2 has at least one of each of the sections 3, 4. In the Figures 1 and 2 In the embodiments shown, bending sections 3 and slip-on sections alternate along the length of the hose 2. It can therefore be said that the hose 2 has a sequence of alternating bending sections 3 and slip-on sections 4.

[0044] The at least one bending section 3 serves to bend the hose 2 in this section and thereby to be able to deflect the subsequent plug-on section 4 by an angle relative to a preceding plug-on section 4.

[0045] The plug-on section 4 serves to allow the latter to be plugged onto the connecting element 5, so that the connecting element 5 is arranged at least partially within the hose 2 in the assembled position. Preferably, at least one connecting section 15 of the connecting element 5 lies within the hose 2 in the assembled position.

[0046] It has proven advantageous if a particularly minimal inner diameter 6 of a cross section of the at least one bending section 3 is matched to a particularly minimal inner diameter 7 of a cross section of the at least one connecting element 5. This has been shown to prevent disturbing noise development at a pressure within a working range. As already explained above, "matched" in this context can be understood as equal and / or with a deviation of + / - 5%, in particular + / - 10%, in particular + / - 15%. Furthermore, if the term "matched" is used multiple times, it does not necessarily have to be interpreted the same way in each case, but can lie within the aforementioned limits with respect to the respective feature.

[0047] The slip-on section 4 or the slip-on sections 4 of the hose 2 can have a constant inner diameter 16 and / or a constant outer diameter 13, as in Figure 1 can be seen. They can therefore be cylindrical in shape.

[0048] In order to be able to bend the hose 2 without damaging the wall of the hose 2 due to excessive stress when applying a force, the at least one bending section 3 of the embodiments shown in the Figures 1 and 2 at least one corrugation 8. The corrugation 8 also forms indentations 9 on the wall of the bending section 3. Due to this design, significantly lower forces act on the wall of the hose 2 in the bending section 3 when the hose 2 is bent, so that, for example, breakage of the hose 2 can be more easily avoided.

[0049] An axial length of a plug-on section 4 can be at least twice as long as an axial length of a connecting section 15. This design of the hose arrangement 1, which is also shown in the Figures 1 and 2 shown, has the advantage that no waste parts are produced when the hose 2 is cut to length. For example, the hose 2 can be divided into at least two parts in the middle of the plug-on section 4 in order to produce two hoses 2, both of which can be used to form a hose connection 21, since the two plug-on sections 4 resulting from the division are each at least as long as the connecting section 15 of a connecting element 5. Thus, the best possible connection can always be created between the divided hose 2 and the connecting element 5 in order to form a tight and stable hose connection 21.

[0050] Preferably, the connection between the hose 2 and the connecting element 5 can be secured by frictional engagement to prevent the two parts from coming loose. Possible configurations will be discussed in more detail below.

[0051] As with the Figures 1 and 4 In the embodiments of the hose arrangement 1 shown, a particularly maximum outer diameter 12 of the at least one bending section 3 can be matched to a particularly maximum outer diameter 13 of the at least one plug-on section 4. This facilitates handling during installation.

[0052] Furthermore, as also in the Figures 1, 2 and 4As shown, a particularly maximum outer diameter 14 of the connecting portion 15 of the connecting element 5 is matched to a particularly minimum inner diameter 16 of the at least one plug-on portion 4. Thus, a stable frictional connection between the connecting portion 15 and the plug-on portion 4 can be formed in a particularly simple manner.

[0053] The connecting element 5, as shown in the Figures 1-4 shown, each has a stop 17 which defines or can define a maximum attachment path of the hose 2 onto the connecting element 5.

[0054] As shown in the detailed views from the Fig. 1 and 4As can be seen, the bending section 3 can alternatively or additionally form a stop 18, against which the connecting element 5 abuts the bending section 3 when the hose 2 and the connecting element 5 are connected. The stop 18 can be formed, for example, by the corrugation 8.

[0055] The bending section 3 has a plurality of indentations 9, in particular caused by the corrugation 8, wherein a minimum inner diameter 6 of the bending section 3 is defined by a bottom of the indentation 9.

[0056] In order to provide the most cost-effective design of the hose arrangement, the bending sections 3 can each be shorter than the plug-on sections 4 of the hose 2.

[0057] In Figure 3A finished hose connection 21 is shown. This has a sheath 19 to protect the underlying hose 2 from external influences. For example, the sheath 19 can be a reinforcement, preferably a reinforcing fabric or a reinforcing braid, to make the hose connection 21 more resistant to mechanical influences.

[0058] To further secure the connection between the hose 2 and the connecting element 5, the hose assembly 1 can have a fixing sleeve 20. The fixing sleeve 20 can preferably have a mounting aid 22 to facilitate sliding it over the hose 2 and / or the sheath 19. The mounting aid 22 can, for example, have a widening cross-section, preferably in the shape of a funnel.

[0059] In Figure 2the process sequence of a possible embodiment variant of a method for forming a hose connection 21 is shown.

[0060] The hose arrangement 1 as described and claimed herein can be used.

[0061] First, the loose hose 2 is shortened to a desired length by splitting it into a slip-on section 4.

[0062] In particular, to avoid waste pieces, it can be advantageous if cutting to length is carried out by splitting the plug-on section 4 in the middle.

[0063] The divided plug-on section 4 can then be pushed onto the connecting section 15 of the connecting element 5. Preferably, both hose parts of the divided hose 2 are used to create a hose connection 21. Furthermore, it can be provided that the hose 2 is provided on a roll so that the required length of a hose piece can be removed therefrom to subsequently create a hose connection 21.

[0064] As already mentioned, particularly good fixation of the hose connection 21 can be achieved by using a fixing sleeve 20. This can be pulled onto the outside of the hose 2 and fixed by applying a radially inward force. The fixing sleeve 20 can comprise all embodiments of fixing elements designed to transmit forces in the radial direction.

[0065] Furthermore, the sheath 19 can be pulled over the hose 2 to improve its resistance and to better protect it.

[0066] The hose arrangement of the Fig. 5 additionally shows a so-called inliner 23, which forms a second fluid path. The inliner 23 runs inside the hose 2.

[0067] In this example, a particularly minimal inner diameter 6 of a cross section of the at least one bending section 3 has a smaller, particularly minimal, inner diameter 7 of a cross section of the at least one connecting element 5. This results in, in particular, a positive jump in the inner diameter in the flow direction.

[0068] In Figure 4It can be seen that a corrugation height, defined here, for example, by the difference between the maximum inner diameter, i.e. the maximum outer diameter 12 minus twice the wall thickness, of the corrugated hose 2 on the one hand and the minimum inner diameter 6 on the other hand, is equal to a wall thickness of the connecting element 9 in the plug-on area 4.

[0069] In Figure 5 However, you can see that the wave height is greater than the wall thickness.

[0070] It has been shown that this also prevents disturbing noise development at a pressure that lies within a working range, in particular in conjunction with an inliner 23. The design of the inner diameter according to the invention is particularly advantageous here because the additional inliner 23 reduces the available inner volume of the hose arrangement 1 and thus a constriction at the inner diameter 7 creates additional flow resistance.

[0071] The invention therefore relates in particular to a hose arrangement 1 comprising a hose 2 which has at least one bending section 3 and at least one plug-on section 4, and at least one connecting element 5 onto which the plug-on section 4 can be plugged or is plugged in the assembled position, wherein a minimum inner diameter 6 of a cross section of the at least one bending section 3 is matched to a minimum inner diameter 7 of a cross section of a connecting section of the at least one connecting element 5 or a minimum inner diameter 6 of a cross section of the at least one bending section 3 is not larger, for example smaller, than a minimum inner diameter 7 of a cross section of a connecting section of the at least one connecting element 5. List of reference symbols

[0072] 1Hose assembly 2Hose 3Bend section 4Sliding section 5Connecting element 6(Minimal) inner diameter of the bending section 7(Minimal) inner diameter of the connecting element 8Corrugation 9Indentation 10Length of the sliding section 11Length of the connecting section 12(Maximum) outer diameter of the bending section 13(Maximum) outer diameter of the sliding section 14(Maximum) outer diameter of the connecting section 15Connecting section 16(Minimal) inner diameter of the sliding section 17Stop of the connecting element 18Stop of the hose 19Sheath 20Fixing sleeve 21Hose connection 22Sliding aid 23Inliner

Claims

1. Hose arrangement (1) comprising a hose (2) which has at least one bending section (3) and at least one push-on section (4), and at least one connecting element (5) onto which the push-on section (4) is pushed in the position of use, wherein the at least one bending section (3) is formed with corrugations (8), wherein the hose arrangement has a sheathing (19) around the hose (2) located beneath it, wherein the sheathing (19) is a reinforcing fabric or reinforcing mesh, characterized in that an internal diameter (6) of a cross-section of the at least one bending section (3) is not greater than an internal diameter (7) of a cross-section of the at least one connecting element (5), wherein the connecting element (5) has a stop (17) up to which the hose (2) is pushed onto the connecting element (5) in the position of use, and wherein the at least one bending section (3) has a stop (18) which is acted upon by the connecting element (5) in the position of use.

2. Hose arrangement (1) according to claim 1, characterized in that the at least one push-on section (4) has a constant internal diameter (16) and / or a constant external diameter (13) and / or is of cylindrical design.

3. Hose arrangement (1) according to claim 1 or 2, characterized in that a wall of the bending section (3) has indentations (9).

4. Hose arrangement (1) according to one of the preceding claims, characterized in that the hose (2) has a repeating sequence of a plurality of bending sections (3) and / or a plurality of push-on sections (4).

5. Hose arrangement (1) according to one of the preceding claims, characterized in that an axial length (10) of a push-on section (4) is at least twice as long as the length (11) of a connecting section (15) of the connecting element (5).

6. Hose arrangement (1) according to one of the preceding claims, characterized in that a maximum external diameter (12) of the at least one bending section (3) is matched to an external diameter (13) of the at least one push-on section (4), or is not greater than, in particular smaller than, an external diameter (13) of the at least one push-on section (4).

7. Hose arrangement (1) according to one of the preceding claims, characterized in that an external diameter (14) of one or the connecting section (15) of the connecting element (5) is matched to an internal diameter (16) of the at least one push-on section (4).

8. Hose arrangement (1) according to one of the preceding claims, characterized in that the at least one bending section (3) has a sequence of indentations (9), in particular identically shaped indentations (9).

9. Hose arrangement (1) according to one of the preceding claims, characterized in that the at least one bending section (3) is designed to be shorter than the at least one push-on section (4).

10. Hose arrangement (1) according to one of the preceding claims, characterized in that the connecting element (5) has a fixing sleeve (20).

11. Hose arrangement (1) according to one of the preceding claims, characterized in that a wall thickness of the connecting element (5) in the region of the push-on section (4) is not greater, in particular smaller, than a wave height, in particular a difference between a maximum external diameter (12) and a minimum internal diameter (6) or between a maximum internal diameter and a minimum internal diameter (6) of the bending section (3).

12. Method for forming a hose connection (21) by using the hose arrangement (1) according to one of the preceding claims, characterized in that a desired hose length is set by cutting the hose (2) to length in a push-on section (4), in particular exactly in the center of the push-on section (4), and in that the cut-to-length push-on section (4) is pushed onto the connecting element (5).