DE10139897C1 - Ribbed pipe, for connecting units, e.g. pumps, to carry liquids, has sealing structures at the rib peaks and/or valleys, to give a self-sealing connection when pushed into a connector - Google Patents

Abstract

The self-sealing ribbed pipe (10), with spaced ring ribs, has sealing structures at some rib peaks (12) and/or gaps (14) between them, extending radially in or out from their contours. The sealing structure (18a,18b) has a chamfer (20a,2b) on the longitudinal section of the rib peaks/valleys, at an acute angle to the axial line (16) of the pipe. The self-sealing ribbed pipe (10), with concentric and spaced ring ribs, has sealing structures at least at some of the rib peaks (12) and/or the gaps (14) between them, and which extend radially outwards or inwards from their contours. The sealing structure (18a,18b) has at least one angled chamfer (20a,2b), on the axial longitudinal section of the rib peaks/valleys, at an acute angle to the axial line (16) of the cylindrical pipe. When the pipe is pushed into a connecting pipe, the sealing structures bear against the inner surface of the connection with a sealing action.

Description

The invention relates to a corrugated tube with a cylindrical extending in the axial direction Body, which has circumferential wave crests and wave troughs, according to the The preamble of claim 1 and a connection arrangement for the fluid-tight connection tion of this corrugated pipe, a corrugated pipe connection section and a connection section for connecting any equipment, such as a pump connection section, pre see, according to the preamble of claim 8. The corrugated tube is made of plastic.

Various arrangements are known in the prior art in which flexible corrugated pipes are used used to transfer any liquids from one liquid storage device to another Transport location for the liquids.

For example, an arrangement with corrugated pipes has become known, which provides that Corrugated pipes for the first time in spray water supply systems for windscreen cleaning or Headlight cleaning, rear window cleaning or the like. In motor vehicles for one sentence arrive. Here, however, it is difficult to make the corrugated pipes liquid-tight to be connected with connection fittings. Complex measures are required, such as the use of special sealing measures to establish a connection between an circuit arrangement and a corrugated tube. Here's an example referred to DE 199 43 764 A1, in which the most complex connection fittings are used reach while there is still a tightness problem.

It is therefore an object of the present invention to provide a corrugated pipe to provide the solution to the problems existing in the prior art is helpful. Furthermore, an arrangement is to be proposed according to the invention, which at is equally helpful in solving the above problems.

Another task is a corrugated pipe and an arrangement for connecting a well to provide tubes that have a safe fluid with minimal effort provide tight connection technology.

According to the invention, a corrugated tube is proposed in which at least some of the Wave crests and / or the wave troughs of the corrugated pipe circumferentially running sealing structure have radially from the contour of the wave crests and / or the wave troughs raise radially outwards or inwards.

In other words, the sealing structures according to the invention on the wave crests are formed, they extend radially outward to form a seal with the corrugated tube preferably to be able to engage surrounding connection sleeve of a connection fitting NEN as they extend circumferentially inward from the wave troughs into one sealing system to get to a support sleeve or the like, which in the inside Knife engages the corrugated tube according to the invention.

Of course, the sealing structures on the outer circumference of the wave crests as well be provided on the inner circumference of the troughs and with a support sleeve as well as egg ner engage on the outside of the corrugated tube connecting sleeve so that sealing measures provided on the inside and outside of the corrugated pipe according to the invention are more likely to ensure a sealing connection to be able to.

The corrugated tube according to the invention is preferably produced by means of a corrugator which sen mold jaw halves are provided with the structures in question, d. H. with the wel lenbergen, the troughs and any sealing structures provided on them.  

It is indeed possible to use only individual wave crests or wave valleys with the invention to be provided in accordance with the sealing structures to be provided, but it is for reasons of assembly cheaper, the sealing structures regularly on the wave crests and / or wave troughs of the corrugated tube must be provided continuously, since the corrugated tube will be installed later then the required sealing structures are always provided in the area of the connection are.

The sealing structure is advantageously in the longitudinal section of a wave crest or one Seen troughs, at least formed with a slope, which is an acute angle has relative to the axial direction of the cylindrical body of the corrugated tube. This Form, which of course should be provided continuously on the corrugated tube, be it the inner or outer circumference can be attached to an inner support with the sloping sealing surface sleeve or against an external connection sleeve of a fitting in order to to achieve the required tightness. The sealing structure can preferably be on the other Side, so opposite the bevel, be provided with a surface that in the longitudinal section right is formed steeply relative to the axial direction of the cylindrical body, and which we hardly need to have a sealing function, just a static one Has to effect stabilization of the sealing structure. The slope with the steep angle can can also be viewed as a latching or engagement structure, since in the transition area between between the steep and the sharp slope a comparatively sharp edge is created can intervene in the surface of the components of a plastic fitting.

The sealing structures of adjacent wave crests and / or wave troughs are advantageously seen in longitudinal section of the corrugated tube, formed with an opposite inclination. On In this way, the adjacent sealing structures can reverse their sealing action exert direction, additionally by the opposing force vectors between the sealing structures and the fitting section arise on which the relevant seal attacks structure, improved holding forces can be achieved. Furthermore, a user needs the Invention does not pay attention to the direction in which he inserted the corrugated pipe into a fitting leads, since at least some of the sealing structures in the area of the fitting the pas send orientation.  

Of course, there can also be advantages if a wave crest or a wave trough each has a sealing structure, the sealing surfaces seen with opposite inclinations have in the longitudinal section of the corrugated tube. That is, instead of a sealing surface and a surface with a steeper angle, which has no possible sealing effect, are two opposing directions Sealing surfaces with an acute angle relative to the axial direction of the cylindrical body intended. To achieve an even better sealing effect and also better holding forces, can between the opposing sealing surfaces on a wave crest or a wave trough a free space may be provided in the plastic material which is under tension of the connection fitting is able to penetrate. Such free space can advantageously also be designed to engage in a snap action with a complementary snap structure to be able to kick a fitting.

It is clear that, as already indicated above, the sealing structures advantageously adhere to all wave crests and / or all wave valleys on the outside respectively should be provided on the inside to be at any length of the invention formed corrugated tube to ensure the presence of the sealing structures according to the invention can, so that the connection fitting can be arranged at any point.

Of course, it is also possible to design the sealing structures according to the invention differently to be formed along a profile of a corrugated pipe. That is, on a wave crest a sealing structure with an oblique sealing surface can be provided on an adj barten Wellenberg can pre-design a sealing structure with two opposing sealing structures hen and on a subsequent wave crest a sealing structure with two ge smooth sealing surfaces and a space in between, possibly as a locking section formed, be provided. The same applies to the sealing structures on the inner circumference towards the wave valleys. This variation in relation to the sealing structures can be advantageous the probability that the corrugated tube according to the invention will be increased in connection with a connection section or connection fitting attached to this results in a liquid-tight connection.

The arrangement designed according to the invention for the fluid-tight connection of a well According to the invention, the tube comprises the corrugated tube with sealing structures according to the invention and  a connection section, a corrugated pipe connection section and a device end section, such as a pump connection section. The well includes Pipe connection section according to the invention at least one outer connection sleeve and / or also an inner support sleeve. The radially inwardly extending sealing structures and / or radially outwardly extending sealing structures of the corrugated tube come in a you end system to the outer circumference of the inner support sleeve and / or the inner circumference of the External connection sleeve.

The inner support sleeve and / or the outer connection sleeve is advantageously the invented appropriately designed connection section each with at least one locking section provided which can be brought into engagement between the corrugations.

Such a connection of a locking section with a corrugated pipe according to the invention ensures that the sealing structure can be released from mechanical loads, and thus the sealing structure to lie statically on an area of the connection section comes, so that due to mechanical loads no loosening of the sealing Connection between the sealing structure and the connection section come about can. In this respect, an inner support sleeve on the connection section in relation to the corrugated pipe is provided in the closing section, this is advantageously in the pipe extension direction expanding. That is, when the pipe is pushed on, through the inside support sleeve puts the tube radially outward under tension. This tension can lead to an improvement in the sealing effect, be it in relation to the sealing structures the outer circumference of the corrugated tube according to the invention or be it in relation to the seal structures on the inner circumference of the corrugated tube according to the invention.

Although the components according to the invention, ie the corrugated pipe and the connection fitting or the connection section according to the invention can in principle be made from any plastics, it has proven to be particularly advantageous to produce the connection section from POM, while the corrugated pipe is preferably made from PP or PE can be produced. Furthermore, a mixture of PP and PA has proven to be sufficiently firm and creep-proof. PA 12 is also very suitable for special loads. PP in particular has also proven to be advantageous. By manufacturing the connection section from POM, a particularly creep-resistant plastic, it can be avoided that the mechanical loads on the materials of the corrugated pipe and the connection section cause material migration which leads to leaks, for example, of an average motor vehicle, within a lifetime.

Thus, according to the invention, a liquid-tight connection of a corrugated pipe to a Adapter part for example a pump or the like., D. H. to a connection fitting or Connection section allows. The connection section according to the invention ensures in connection with the sealing structures of the corrugated pipe according to the invention an optimized Tightness. The inner support sleeve of the connection section can additionally increase th surface pressure in relation to the sealing structures and their opposite Areas of the connection section ensure that there is an additional increase in the sealing kung can be made possible.

The invention is preferably directed to systems in motor vehicles for the supply from cleaning agents to window cleaning systems, for example for a windshield of a motor vehicle are provided. To ensure the tightness of a corrugated pipe connection for However, to be able to guarantee the electrical cable protection better, it is also possible to use cables consider protective applications or applications that are suitable for the delivery of Ga are thought. Here, for example, rubber sleeves or Like. Be included in a connection, which then in connection with the seal structures of a corrugated pipe according to the invention even to an easy to install, can lead gastight connection.

Especially in the event that the subject of the invention in connection with volatile gene or diffusive substances is used, for example. Fuels in motor vehicles, can the wall of the corrugated pipe and / or the container has multiple layers, possibly with a diffuser onsperrschicht be formed.

The corrugated pipe according to the invention can, if it is pressurized, have a length undergo elongation and an increase in diameter, which leads to a very advantageous increase  the surface pressure in the area of the sealing structures, so that the fiction the achievable sealing effect is increased with a pressurized pipe.

The present invention is described below on the basis of preferred embodiments explained in more detail with reference to the accompanying illustration, wherein further target set tongues, advantages and features are disclosed according to the invention. Show it:

FIG. 1 shows a corrugated pipe in a side view, wherein the corrugated tube comprises features according to the invention;

FIG. 2 shows an embodiment of a seal structure of a corrugated pipe according to the invention in a longitudinal section;

FIG. 3 shows another embodiment of a seal structure in a longitudinal section;

FIG. 4 shows another embodiment of a seal structure in a longitudinal section;

5 shows an arrangement according to the invention in a partial longitudinal section and a partial side view. and

Fig. 6, 6a, 6b a further embodiment of an assembly according to the invention with a partially cut-terminal portion (Fig. 6a), a Seitenan and a corrugated pipe connection side plan view of view of an inventively embodied corrugated tube (Fig. 6) on the terminal portion of FIG. 6a (Fig . 6b).

In the illustrations, the same or at least functionally identical components are the same Chen provided reference numerals.

Fig. 1 shows a corrugated pipe section 10 having features of the invention. The corrugated tube section 10 has wave crests 12 and wave troughs 14 . These extend transversely relative to a longitudinal axis 16 of the generally cylindrical body of the corrugated tube. It should be noted that the corrugated pipe according to the invention does not have to have a round cross section, of course. The corrugated pipe according to the invention can have a cross section that is in principle arbitrary, in which case, of course, the connection section assigned to this corrugated pipe should also be shaped accordingly. For example, the corrugated tube according to the invention can also be oval, angular, approximately rectangular or the like, although an embodiment according to the invention should nevertheless be provided.

According to the invention, the corrugated tube 10 has a sealing structure 18 a, 18 b on the outer circumference of the wave crests 12 . The sealing structure 18 a has a sealing surface 20 a, which has an opposite inclination to a slope 20 b, a sealing structure 18 b, which is provided on an adjacent wave crest 12 .

While only sealing structures are provided on the outside of the shaft crests 12 according to FIG. 1, sealing structures can of course also be provided on the inside of the shaft teasers.

The inclination of the sealing surfaces 20 a, 20 b of the sealing structures 18 a, 18 b can be the same or different. The inclination is advantageously less than 45 ° and the sealing surface 20 a is formed as long as possible. The steeply inclined surface of the sealing surface 20 a, 20 b, which essentially has hardly any sealing effect, essentially serves to stabilize the sealing structure. It can also be used for resting purposes.

FIG. 2 shows a further embodiment of a sealing structure 18 b ', which is arranged on a wave crest 12 . This is rounded at its radially outermost section. It can also be pointed or even more rounded. The manufacturing process, the passage of a hot plastic deformable plastic through a corrugator, makes it easier to form structures that are less pointed. With regard to a sealing structure on the inner circumference of a trough 14 , however, it should be noted that such a structure can even be formed with more abrupt or pointed edges.

The sealing structure 18 b ′ shown has a sealing surface 20 b, which has an acute angle relative to the central longitudinal axis 16 ( FIG. 1) of the corrugated pipes according to the invention. The surface 22 b is steep. In this sealing structure 18 b ', the side 22b has essentially no sealing function. The sealing function is provided essentially in the area of the surface 20 b and possibly in the radially most extended area of the sealing structure 18 b '.

FIG. 3 shows another embodiment of a sealing structure 18 c, which is designed with two sealing surfaces 20 c, 20 c '. These sealing surfaces 20 c, 20 c 'are designed to run against each other.

FIG. 4 shows a further embodiment of a sealing structure with sealing surfaces 20 c, 20 c ', which can in principle be designed as is the case according to FIG. 3. However, a constriction 22 is provided here in the joint area between the sealing surfaces 20 c, 20 c '. This constriction 22 can also be designed as a latching structure in order to be able to engage with an inner structure on an inner circumference of an outer connecting sleeve. This configuration with the free space or the constriction 22 additionally makes it possible to provide two radially farthest and possibly equally far-reaching end regions or tips 24, 24 ', as a result of which an increased sealing effect can also be applied.

It should be noted that the sealing structures according to FIGS . 2 to 4 can of course also be provided accordingly on the inner circumferential areas of the wave troughs 14 , such that the sealing structures extend radially inwards.

According to Fig. 5 a corrugated pipe 10 in turn is shown according to the invention may correspond to the the corrugated tube of FIG. 1.

A connection section 50 according to the invention has only one outer connection sleeve into which the corrugated tube 10 is inserted. The sealing structures come into contact with the inner circumference of the outer connection sleeve 52 in such a way that a radially inwardly acting surface pressure is produced with respect to the sealing surfaces 20 a, 20 b of the corrugated tube 10 . A tight connection can be achieved here.

The connection section 50 has a transition area 54 which merges into a shoulder area 56 , at the end of which a device connection section is provided which comprises a sealing bevel 60 and a connection or latching area 58 . An opening 62 is used to supply cleaning fluid into or out of the corrugated tube 10, for example.

Referring to FIGS. 6 to 6b, a further advantageous embodiment is illustrated in accordance with the OF INVENTION dung. The corrugated tube according to Fig. 6 can turn the corrugated pipe according to FIG. 1, respectively. Of course, the sealing structures according to FIGS . 3 to 4 or a mixture thereof can also be provided on the corrugated tube 10 according to FIG. 6.

The connection section 50 'according to FIG. 6a is in principle designed like the connection section according to FIG. 5. However, an inner support sleeve 51 is also provided here, which may have a conical configuration. The conical design serves to mechanically exert pressure on the corrugated tube so that a higher surface pressure can be achieved and secondly to enable the tube to be inserted better, ie to center the tube relative to the inner support sleeve 51 . The inner support sleeve naturally has an opening 51 a, through which liquid can reach the opening 62 . On the side of an opening 53 of the connection section 50 ', engagement or latching sections 52 a, 52 b are provided. These engage in the wave valleys 14 between adjacent wave crests. A holding force for the corrugated tube 10 can be brought about by means of these holding or latching sections 52 a, 52 b.

According to Figure 6b can be seen., That the outer retaining or detent portions 52 a and le can be diglich partly circumferentially provided. Correspondingly, the holding or latching sections 52 b provided further inside can also be provided only partially around the circumference. Of course, both or one of the holding or latching sections 52 b can also be provided in full if a particularly high holding force is to be provided.

Claims (11)

1. Corrugated tube with an axially extending, preferably cylindrical Kör by, which comprises circumferentially extending wave crests and wave troughs, characterized in that at least some of the wave crests and / or the wave troughs of the corrugated tube have circumferentially extending sealing structures which are radial from the contour of Elevate the mountains and / or the wave valleys, namely radially outwards or inwards. 2. Corrugated pipe according to claim 1, characterized in that the sealing structure ( 18 a, 18 b) seen in the axial longitudinal section of a wave crest or a wave trough, at least one slope ( 20 a, 20 b), which has an acute angle relative to the axial direction ( 16 ) of the cylindrical body. 3. Corrugated tube according to one of claims 1 or 2, characterized in that the sealing structure ( 18 a, 18 b) seen in the axial longitudinal section of a wave crest or a wave trough, has at least one slope ( 22 b) which is at a steep angle relative has the axial direction of the cylindrical body. 4. Corrugated pipe according to one of claims 1 to 3, characterized in that the Sealing structures of adjacent wave crests and / or in the longitudinal section of the corrugated tube hen, have opposite inclinations. 5. Corrugated pipe according to one of claims 1 to 4, characterized in that a Wel lenberg or a trough a sealing structure ( 18 a) with sealing surfaces with opposing inclination supply seen in longitudinal section of the corrugated pipe. 6. Corrugated pipe according to claim 5, characterized in that a free space ( 22 ) is left at least in regions between the sealing surfaces. 7. Corrugated pipe according to one of claims 5 or 6, characterized in that the free space ( 22 ) is designed to enable a latching attack. 8. Arrangement for the fluid-tight connection of a corrugated tube according to one of claims 1 to 7 with this corrugated tube and a connection section ( 50 , 50 '), the a corrugated pipe connection section ( 52 ) and a device connection section ( 56 , 58 , 60 , 62 ), approximately one Pump connection section, wherein the corrugated pipe connection section comprises an inner support sleeve ( 51 ) and / or an outer connection sleeve ( 52 ), the radially inwardly extending sealing structures and / or the radially outwardly extending sealing structures ( 18 a, 18 b) of the corrugated pipe with the The outer circumference of the inner support sleeve ( 51 ) and / or the inner circumference of the outer connection sleeve ( 52 ) come into sealing contact. 9. An arrangement according to claim 8, characterized in that the inner supporting sleeve (51) and / or the outer supporting sleeve (52) in each case at least one latching portion (52 a, 52 b) in ways that are engageable with the corrugations of the corrugated tube in engagement. 10. Arrangement according to one of claims 8 or 9, characterized in that the inner support sleeve ( 51 ) in the pipe extension is further. 11. Arrangement according to one of claims 8 to 10, characterized in that the connecting section ( 50 , 50 ') is made of POM, the corrugated tube ( 10 , 10 ') is preferably made of PP or PE.