NO329087B1 - Device for connecting a resilient plastic double conduit with a consumer of water - Google Patents

Abstract

This connector (1) joins a flexible plastic, double-walled supply line (5) to consumers. The line is formed by an inner pipe (51) carrying water; with an outer, empty tube (52) encasing it. The line is laid under rendering, at least. The connector joins directly or indirectly, to a valve feeding the consumer. The connector comprises a basic box section (1) with flange, and a fitting (3) inside. There is a boot or grommet (2) which is pushed over the line (5). A coupling flange at the other end of the boot connects to the flange. The free end of the boot has a shank section (150), with a funnel section between. The boot is made of a dimensionally-stable primary material and has at least one ring segment (251) behind the coupling flange.

Description

The present invention relates to a device for the connection of at least one flexible double plastic pipeline (pipe-in-pipe system) with a consumer of water, whereby the double pipe is mostly laid under plaster and the device serves for direct or indirect connection to one arranged for the consumer armature. The device consists of a box-shaped base body, a connection piece inserted therein and also a flexible box foot that can be moved over the double tube, which can be connected to the box-shaped base body. The box base encloses the end section of the double pipes supplying the box, and likewise the water-carrying inner pipe and also the surrounding empty pipe. If a device is designed in such a way that each branch of the connecting piece, to which the supplied double pipe is connected, that protrudes from the box base body, the box foot can also partially enclose this branching.

Such a type of device is disclosed in GB-A-2 021 233; catalog from the company IDROKON S.r.l., Dossobuono/IT, 1991) consists of a box-shaped basic body, in which an angled connection piece is inserted. The horizontal branching of the connection piece serves as a connection for consumers and the vertical branching towards the underside for connection to double pipes. The vertical branch is completely baked into the box-shaped base body, so that the connecting piece of the pre-attached box is pulled out from the front and the inner pipe must be passed through the box. The connection - mostly a screw-on - then follows outside the box-shaped basic body. After the screwing, the connection piece is then returned to the box and fixed and finally the box foot projecting above the double pipe is pushed under onto the box-shaped base body. The box foot has the function of protecting the screwing against mortar and of holding the empty pipe. This connection device has the drawback that assembly is relatively expensive due to the necessity that the connection piece for screwing with the double pipe must be pulled out. The box base is stiff and cumbersome and, consequently, the piping.

From DE-A-35 22 390 and the prospectus "optiflex® - Sanitary installation system 0-286", 4.86 of R. Nussbaum AG, Olten/CH, a connection box for a water fitting is known, which exhibits a basic half and a covering half. There is no separate, removable box foot provided here, but the covering and holding of the connections or the empty pipe follows through the tapered extension on both collapsible halves. Assembly is here somewhat simplified in that the passage of the inner pipe through the box takes place when connected. The free-hanging connection piece nevertheless causes difficulty when connecting. Also, the rigid extensions of the box halves force a rectilinear feed of the double tubes.

A decidedly improved assembly enables the box in accordance with EP-B-0 354

177 (compare also prospectus "JRG Gunzenhauser INFO 2/92" by J. + R. Gunzenhauser AG, Sissach/CH). Through the division of the box into a box-shaped basic body and a box foot that can be moved on the double tubes and likewise the connecting piece protruding from the box-shaped basic body - which is fixed in the box - the delivery and return of the connecting piece into the box is now eliminated when the inner tube is screwed on. In the transition from the connecting part to the shaft, the box foot exhibits a radial circumferential section, which allows the rigid shaft to bend in certain areas in all directions, deviating from the axial axis of the box foot. This flexibility is achieved through the thin walls of the box base in the area of the incision. Thereby, a simplification of the assembly is achieved, and it becomes possible to add the bent double pipe to the box.

A box foot with improved flexibility in the shaft is published in the prospectus JRG Sanipex® - Calor by J. + R. Gunzenhauser AG, Sissach/CH. The shaft connecting to the coupling part is made bellows-shaped and can thereby bend in a wider radius and can be compressed in the direction of the coupling part. On the box-shaped base body and on the part of the connecting part to the box base opposite to the box-shaped base body, there are arranged opposite complementary circumferential ledge edges, so that the box base can be inserted into the box-shaped base body in a short area and that the box is, so to speak, deposited on the box base . Overfolded, ring-shaped and small-diameter cuffs are arranged on the extending shaft ends, which have the function of encompassing and holding the empty tube tightly.

EP-A-0 538 197 contains a similar box foot, whereby here a shorter, bellows-shaped section is arranged in the transition between the coupling part and the shaft. Between the basic body of the box and the connecting part, there is also a shaped, deposited push-in connection. On the extending shaft ends, a clip-shaped clamping device designed as an open ring has been arranged for holding the empty tube. These clamping means are connected to the shaft via a flexible strap. In the interior, the clamping member has a radially encircling, raised arc, which narrows the inner width of the clamping member and thereby encloses the empty tube more firmly.

The last-mentioned box foot also exhibits even more imperfections regarding its flexibility when sealing against the box-shaped base body and against the empty pipe, as well as in relation to its production cost.

In summary, it can be determined that the box feet known to date cannot be considered to be completely problem-free. The invention thereby sets the following problem as a basis, to provide a box foot with improved flexibility. At the same time, the fixed sealing on the one side between the connecting flange to the box foot and the flange part of the box-shaped base body as well as on the other side between the end piece of the shaft to the box foot and the empty pipe must be ensured. A further aim of the invention is to raise the efficiency of the production of the box base in mass production.

The box foot must be attached to a box-shaped base body, which has one or more flange sections, i.e. suitable for single or multiple boxes. The produced box foot for a box-shaped basic body is preferred, of the type that is in accordance with EP-B-0 354 177, where the lower branch protruding from the connection spigot fixed to the box-shaped basic element of the box-shaped basic body and the connection point with the inner tube is protected by the box foot. The box foot must be suitable in the same way for the connection device, which has a completely arranged in the box-shaped basic body, non-protruding connection piece.

It goes without saying that the box base must exhibit stability and material resistance in relation to installation conditions.

The principle solution of the invention consists in that the box foot consisting of rigid primary material in the shaft is at least arranged with an annular tube segment of elastic rubber-like material, on both sides of which a primary material is connected. In what follows, the term rubber material is used as a simplification for the rubber-like material, without thereby being restricted to only include rubber.

In a particularly advantageous construction, the box foot consists of a skeleton-like primary part made of primary material and a skeleton-like secondary part made of the rubber material, which is produced in two-component injection molding. The shaft of the box foot has several ring-shaped pipe segments, which consist of alternating alternating primary and rubber materials respectively, whereby the material transitions prevailing at any given time are connected to each other.

It is advantageous to arrange the annular, spaced tube segments of the primary part with connection steps to smooth out both engagement contours and attachment of the primary part by injection molding the rubber material and overflow for the rubber material. The intermediate seal and the end seal - belonging to the secondary part - also consist of the rubber material. The intermediate seal is arranged on the front side of the coupling flange, so that when the box foot is placed on the front side of the flange part of the box-shaped base body, it is in a sealing position. The closing seal is placed on the last, outer pipe segment and has a tapered shape in the inner diameter or a lip-shaped sealing edge. An efficient production of the box base is achieved when the secondary part in the second phase of the injection molding production is shaped as connected ring segments, which are produced with an intermediate seal and an end seal with transitions. The transitions within the primary and secondary parts serve to feed off the individual segment parts in two-component injection molding.

By elevating the tube segments consisting of rubber material above the tube segments in the primary part, a good grip is also achieved for connecting the box foot with the hand to the box-shaped basic body. As a primary material, thermoplastics, especially polypropylene, have proven suitable, and as a secondary material, a type of weak rubber, in particular thermoplastic elastomers, have proven suitable.

Thanks to the invention, a box foot with a light, bendable shaft in both axes and a solid seal against the box-shaped base body and the empty pipe is now available. Through this, a narrower contact radius for the supplying double pipes is possible without greater force influence on the flange parts of the box-shaped basic body. The improved sealing is particularly advantageous when water starts to flow out as a result of damage, so that the water is kept inside the empty pipe and carried away and thereby does not cause damage to particularly sensitive building materials, for example a wooden cladding. The box foot in accordance with the invention can also be held excellently in the hand during assembly and allows a rational and cost-effective production in series production. Finally, the possibility opens up for an eye-catching and distinctive color arrangement.

According to the attached drawings, the detailed description with design examples of the mentioned box foot follows, whereby associated possible modifications are used. It is shown: fig. 1 in perspective the skeletal primary part of the primary material;

fig. 2 a section in the longitudinal direction in accordance with fig. 1;

fig. 3 is a perspective view of the skeletal secondary part in the rubber material;

fig. 4 is a perspective view of the finished box foot;

fig. 5 an axially executed vertical section through the box base in accordance with fig. 4;

fig. 6 the intermediate seal at the connection part to the box foot in accordance with the cut

A-A in fig. 4;

fig. 7 is a front view of the flange portion of the box-shaped base body;

fig. 8 an axially executed vertical section through the complete box with double tube screwed on;

fig. 9 a detailed section with intermediate seal in accordance with fig. 4 and 6 in the theoretical overlap in the sealing groove at the flange part of the box-shaped base body, and

fig. 10 the intermediate seal in accordance with fig. 9 with the real deflection

of the sealing lip.

The primary part 100, this is first produced within a possible applied two-component injection molding method - consists of a coupling flange 110, known per se, arranged on the front and the somewhat conically reduced funnel piece 130 for the shaft 150. On the coupling flange 110, there are two located one above the other and coupling chamber 112 placed against each other. The shaft 150 is assembled from several ring-shaped pipe segments 151, between which there is a distance and the hoop-shaped connecting steps 152 form a bridge over these. Through the hoop shape of the connecting steps 152, the elasticity between the pipe segments 151 is ensured. The connection step 152 between the funnel piece 130 and the first, nearby pipe segment 151 and the further pipe segments 151 are alternately arranged - with always a connection step 152 above and the connection step 152 between the next pipe segments 151 below, while the connection step 152 to the next pipe segment 151 further is arranged below. The alternating arrangement of the connecting steps 152 reduces the negative influence of the connecting steps 152 on the elasticity of the primary part 100 and thereby also on the complete box foot. These connection steps 152 hold the funnel piece 130 with all the pipe segments 151 together, and enable the later flexibility of the finished box foot over both axes. The connecting steps 152 lie in the same plane as the inner wall, but never assume the same thickness as the pipe segment 151. The main function of the connecting steps 152 is still the separation of the pipe segments 151 during injection molding.

Furthermore, the pipe segments 151 have an engagement contour 153 - here in the form of a radial, but completely circumferential groove. This engagement contour 153 serves to hold the pipe segments 151 in the injection molding tool during the injection molding of the secondary parts with the rubber material, so that the pipe segment 151 is not displaced by the pressure of the injected rubber material.

From the upper edge of the connecting flange 110, an outer axially oriented overflow groove 113 runs, which then continues over the funnel piece 130 and further over all connecting pipe segments 151. On the pipe segments 151, the overflow groove 113 always alternates between closely located pipe segments 151 from above towards the underside and further towards overlook it. This favors the flow of the rubber material when injection molding the secondary part.

The following applies to the overall further description. If a reference number is included in a figure for reasons of clarity of the drawing, but not immediately expressed in the associated description text, then references are made to what is mentioned in the preceding figure descriptions. For the sake of clarity, the repeated designations of the structural parts in the subsequent figures are mostly repeated, as long as the clarity of the drawing is recognisable, as this is about recurring building parts.

Fig. 3 and 6

The secondary part 200 does not exist in the form shown as a separate part, but is injection-molded on the previously mentioned primary part 100. The skeleton-like representation of the secondary part 200 occurs solely as an illustration of the structurally subtle structure of the complete box foot and its manufacture.

The secondary part 200 further occupies the free space left by the primary part 100 at the edge areas - where the intermediate seal 210 and the end seal 280 are. First of all, the intermediate seal 210 is located on the further further ring segments 251 of the rubber material, expressing the space between the tube segments 151, adjacent. With the last ring segment 251, the cuff-like end seal 280 connects.

Complementary to the overflow groove 113 in the primary part 100, a plurality of broken connection tabs 213 are arranged in the secondary part 200. Furthermore, the connecting flaps 213 extend from the intermediate seal 210 to the first, nearby ring segment 251, which joins in the finished box foot at the funnel piece 130. Analogous to the alternation of the overflow groove 113 in the pipe segment 151, the sections in the connecting flaps 213 also alternate between the always nearby ring segments 251 from top to bottom. Thereby, at each lower section of the connecting tabs 213 there is between the first and the second as well as between the third and fourth ring segments 251. Overlying sections of the connecting tabs 213 are also found between the second and the third ring segment 251 as well as between the fourth ring segment 251 and the end seal 280. The connection step 152 is included in the ring segment 251, so that the cross-section of the ring segment 251 at these places is reduced by what the connection step 152 constitutes, without the individual ring segments 251 being completely omitted. In the ring segments 250 there are, so to speak, grooves 252 which are completed by the connecting steps 152. The ring segments 251 are radially concave - and exhibit a so-called circumferential groove.

The annular intermediate seals 210 are arranged in the cross-section with an approximately angular profile with an annular surface 209 resting on the coupling flange 110, an outward facing, radially circumferential sealing surface 208 and a radially circumferential, truncated cone-shaped sealing lip 207. On the sealing lip 207 there is itself a conical sealing side 206, which is oriented in the longitudinal axis of the box base.

The termination seal 280 has the external shape of an extended ring segment with a radially concave contour. Internally, the closing seal 280 is convex and thereby tapers at its inner width in order to firmly and sealingly enclose the later introduced empty pipe.

Fig. 4 and 5

After completion of the production of the secondary part 200, which is injection-molded on the primary part 100 located therein within the possibly used two-component injection molding method in the tool mold, the complete box base 2.1 has been produced. In the example shown, the box base 2 is assembled from a primary part 100 with four pipe segments 151 and the secondary part 200 with at least four ring segments 251. The contact surfaces between the pipe segments 151 and the ring segments 251 as well as all other contact surfaces between the primary material for the primary part 100 and the rubber material for the secondary part 200 are releasably connected to each other, i.e. glued or thermoplastic welded together. Surrounding the front side of the passage opening in the box base 2, the intermediate seal 210 is arranged on the coupling flange 110, while the shaft 150 ends on the back side of the end seal 280.

In order to improve the gripability of the box foot 2, on the outside, radial grooves project up with the ring segments 251 in the tube segments 151 along the diameter, so that it slides firmly into the rubber material in the secondary part 200, comes into contact with the palm of the hand when gripping around the box foot 2. Through this, the box foot 2 can be easily connected with the box-shaped base body with damp or oiled hands. The concave outer contour of the ring segment 251 - obtained, so to speak, through a radial groove - provides clearance by elastically shaping the shaft 150 of the box foot 2 over one or both axes, i.e. by axial contraction and/or by lateral bending. Here, the individual ring segments 251 are elastically deformed - on the one hand through the contraction and on the other through expansion - while the rigid tube segments 151 together with the connecting flange 110 and the funnel piece 130 ensure the basic shape stability of the box base 2.

Fig. 7

The box-shaped base body 1 - here almost without any inserted connection pieces - has a flange part 11 known per se for attachment to the box foot 2 coupling flange 110.1 the flange part 11 is a central, large passage opening 12 located, from which the connection piece protrudes or is recessed. Both sides of the passage opening 12 are each provided with recesses 13 complementary to the coupling cam 112, so that the box foot 2 can be connected to the box-shaped base body 1 by means of a bayonet connection. The passage opening 12 is surrounded by a conically inclined sealing groove 14. On the inside of the box-shaped base body 1 there are stiffeners 15 for fixing the connecting pieces that are inserted.

Fig

In the assembled state, the connection piece 3 sits in the box-shaped base body 1, one branch of which for connection to the inner tube 51 here protrudes from it in the box-shaped

the base body 1 accommodates passage opening 12. The second branch to the connection piece 3 serves for indirect or immediate connection with a fitting at a water consumer. The connecting piece 3 rests inside the box-shaped base body 1 on the bracing 15.

On the flange part 11 of the box-shaped base body 1, the box foot 2 is connected, whereby the funnel 130 in the box foot 2 occupies the screw connection 4 between the inner pipe 51 and the connecting piece 3. From the shaft 150 of the box foot 2, the supply end of the double pipe 5 is enclosed by an outer empty pipe 52 .

The sealing surface 208 at the intermediate seal 210 lies along the surrounding edge

the passage opening 12, and the sealing lip 207 is sealingly inserted into the sealing groove 14 of the flange portion 11 in the box-shaped base body 1. Through the end seal 280, the supply double pipe 5 protrudes through this, whereby the empty pipe 52 is enclosed and thereby held in place by the tapering end seal 280 and protrudes depending on the shape more or less into the box base 2. The intermediate seal 210 as well as the end seal 280 provide a seal of the inside of the seal against the outside.

Fig. 9 and 10

It is advantageous that the inner surfaces 16 in the conical sealing groove 14 of the flange portion 11 - in relation to the sealing surface 206 of the intermediate seals 210 - are more steeply designed. Consequently, the inner surface 16 approaches the theoretical longitudinal axis through the box foot 2, which is steeper than the sealing side 206. Thereby it is ensured that even in the event of measurement inaccuracies in the sealing side 206, the inner surface 16 always lies tightly against, i.e. the pressure with a bias against the inner surface 16. In the event of leaks in the device due to leakage of water, due to the increase in pressure in the box-shaped base body 1 or in the box base 2, the sealing lip 207 is automatically pressed with increased pressure against the inner surface 16.

A number of constructive variations are possible in relation to the described box foot. These are expressed here in the following: The closing seal 280 can internally by the inwardly directed convex

contour also exhibit a sealing lip tapering for the inner width.

In principle, a box foot 2 with only one ring segment 251 consisting of rubber material is also possible, which is integrated inside the shaft 150. This ring segment 251 can be arranged immediately at the transition from the coupling flange 210 to the funnel piece 130, respectively between the funnel piece 130 and the shaft 150 or inside in that two-part shaft 150.

The connecting step 152 and the connecting tab 213 can be dispensed with at least partially or even completely. These contours or elements, however, prove to be advantageous when using the two-component injection molding method.

The simultaneous placement of the intermediate seal 210 and possibly also the end seal 280 are operations for improving the seal, but are not conditions for the flexibility of the box foot 2. The flexibility of the box base 2, the intermediate seal 210 and the end seal 280 are independent of each other or can be combined with each other as desired.

The box foot 2 does not need to have a conical expanding funnel piece 130, this depends on the dimension of the through opening 12 and the size, as well as the positioning of the screw connection 4.

It is also possible inside the funnel piece 130 to arrange at least one additional or

single elastic ring segment 251.

The box foot 2, including the shaft 150, does not need to have a round cross-section. When flexibility is decisive, oval and angular cross-sectional shapes are also possible. In the case of the desired seal at the introduction of the double pipe 5 with an end seal 280, this end seal 280 will in any case be given an inner contour, which encloses and keeps the round double pipe 5 sealed.

For the design of the intermediate seal 210, it mainly applies that the sealing flank 206 through the geometric shape of the sealing lip 207 and the sealing groove 14 must rest against the inner side 16 with a bias. This is a prerequisite for the sealing function; measurement inaccuracies are compensated for and in case of damage the pressure rises at the sealing lip 207 and presses more strongly against the inner surface 16.

The box foot 2 can be in one piece as a finished part or consist of two joinable halves, whereby a hinge-like connection in the common dividing line between the halves comes into consideration.

Claims (1)

1. Device for connecting at least one flexible double pipeline (5) in plastic - formed by a water-carrying inner pipe (51) and a surrounding empty pipe (52) - with at least one water consumer, which device functions for the direct or indirect connection of at least one fitting connected upstream of the consumer, in that a) the device consists of a box-shaped basic body (1) with a flange part (11), at least one connection piece (3) inserted in the box-shaped basic body (1) as well as a displaceable over each double pipe (5) respectively collapsible, flexible box foot (2), b) one end of the box foot (2) has a coupling flange (110) which can be connected to the flange portion (11), and c) the box foot (2) has a shaft (150) at the other end , characterized in that d) at least one ring segment (251) is arranged behind the coupling flange (110) in the box foot (2) consisting of dimensionally stable primary material, which ring segment (251) is made of elastic rubbery material at room temperature, and the primary material is connected to b both sides with the ring segment (251), e) an intermediate seal (210) consisting of the elastic rubber-like material is arranged at a front end of the coupling flange (110) in such a way as to thereby surround its entrance opening and is intended to seal the connection between the box foot (2) - i.e. between the flange part (11) and the coupling flange (110), and f) there are adhesive or welded connections at the transitions between the primary material and the elastic rubbery material. 2. Device according to claim 1, characterized in that a) an end seal (280) consisting of the elastic rubbery material is arranged at one end of the shaft (150), the function of which is to enclose the penetrating double pipeline (5) on a clamping or sealing manner, whereby b) there are adhesive or welded connections at the transitions between the primary material and the elastic rubbery material. 3. Device according to claim 1 or 2, characterized in that a) the box base (2) is composed of a primary part (100) and a connected secondary part (200), which first part consists of the primary material and the second part of the rubbery material, and b) the shaft (150) is formed by several pipe segments (151) and ring segments (251) adapted to each other, whereby c) the first pipe segment (151) belongs to the primary part (100) and the second ring segments (251) to the secondary part (200). 4. Device according to claim 3, characterized in that a) the pipe segments (151) are arranged at a distance from each other and through elastic connection steps (152) of the primary material are skeletally connected to each other, whereby the connection step (152) originates from the supply during the plastic injection molding, and ) the device towards the box-shaped base body (1) facing side of the primary part (100) has the connecting flange (110), and c) a funnel piece (130) joins the connecting flange (110) and after this follows a first pipe segment (151) which is covered together with the funnel piece (130) through a connecting step (152), and d) at the last pipe segment (151) the closing seal (280) is arranged, and e) at the coupling flange (110) there is a coupling chamber (112) for engagement in the flange part (11) in the box-like base body (1). 5. Device according to claim 4, characterized in that a) an axially extending overflow groove (113), starting at the connecting flange (110) for supplying the used injection molded plastic which penetrates over the funnel piece (130) and then interrupted also over the pipe segments (151) in an axial extent -ning, and b) the pipe segments (151) exhibit external gripping contours (153) through fixation of the plastic injection molding, whereby the gripping contours (153) are preferably designed as at least partially radially encircling grooves. 6. Device according to claims 4 and 5, characterized in that a) the connection steps (152) and the section of the overflow groove (113) are arranged offset in the radial direction by approximately 180° in relation to the nearby pipe segment (151) or ring segment (251), respectively, and b) the connection steps ( 152) exhibits a reduced thickness in relation to the reduced walls of the tube segments (151) through the overflow groove (113), and c) the connecting steps (152) are curved. 7. Device according to claim 5 or 6, characterized in that a) the secondary part (200) - with the number of pipe segments (151) - consists of a plurality of ring segments (251), and b) the ring segments (251) as well as the intermediate seal (210) and the end seal ( 280) is connected with connecting tabs (213) belonging to the cut-out overflow grooves (113), whereby c) the connecting tabs (213) originate from the supply during the plastic injection molding, and d) the ring segments (251) can be concave on the outside, and e) the ring segments (251) in its outer diameter, at the transition, protrudes above the pipe segments (251), so that the non-slip rubbery material in the secondary part (200) clearly comes into contact with the palm when gripping the box foot (2). 8. Device according to one of claims 2 to 7, characterized in that a) the closing seal (280) is internally convex or has a raised sealing edge, in order to narrow the inner width and hold and seal the penetrating double pipe with the outer empty pipe ( 52), and b) the end seal (280) on the outside is concave. 9. Device according to one of claims 1 to 8, characterized in that a) a sealing groove (14) is arranged on the box-shaped base body (1) for partial absorption of the intermediate seal (210), which radially surrounds the passage opening (12) in the flange part (11) , and b) the sealing groove (14) has an inner side (16). 10. Device according to claim 9, characterized in that a) the intermediate seal (210) has a sealing lip (207) with a sealing surface (206), whereby b) the sealing surface (208), when the box foot (2) is attached to the box-shaped base body (1), lies with bias at the inner side (16) of the sealing groove (14), and c) with the result that the tightness is ensured, the measurement inaccuracies are compensated and the sealing lip (207) is pressed to a greater extent at the inner side (16) when pressure increases in the event of damage. 11. Device according to claim 10, characterized in that a) the intermediate seal (210) in addition to the sealing lip (207) has a radially circumferential outer deposition surface (208) and an annular surface (209), whereby b) the deposition surface (208)) when the box foot ( 2) is attached to the box-shaped base body (1), lies between the flange part (11) and the coupling flange (110), and c) between the ring surface (209) and the coupling flange (110) there is an adhesive or thermoplastic welded connection on the surfaces. 12. Device according to claims 10 or 11, characterized in that a) the sealing surface (206) located on the sealing lip (207) of the annular intermediate seal (210) is conical and oriented in the longitudinal axis of the box foot (2), and b) that in the conical sealing groove (14) to the flange part (11) situated inner side (16) - in relation to the sealing side (206) in the intermediate seal (210) - is designed steeper; i.e. the inner side (16) approaches the theoretical longitudinal axis through the box base (2) more steeply than the sealing side (206). 13. Device according to one of claims 3 to 12, characterized in that a) the specific branch of the connection piece (3) for connection to the water-carrying inner pipe (51) protrudes from the box-shaped base body (1), and b) the screw connection (4) ) between the inner tube (51) and the connecting piece (3) is enclosed by the funnel piece (130) or an extended part of the box base (2), and c) the box base (2) consists of one piece or two joined halves, whereby the halves are connected with each other at a common dividing line. 14. Device according to one of the preceding claims, characterized in that the box base (2) is manufactured by a two-component injection molding. 15. Device according to claim 14, characterized in that a) in the first phase of the injection molding, the primary part (100) is injection molded, and b) in the second phase, the secondary part (200) is injection molded on the primary part (100), whereby c) the secondary part (200) at least has a ring segment (251) or an intermediate seal (210) or a combination thereof and further has an end seal (280). 16. Device according to claim 15, characterized in that a) through supply to the primary part (100) during the first phase of the injection molding, the arranged channels in the injection molding tool, corresponding to the connecting step (152), which extend from the funnel piece (130) to the first nearby pipe segment (151) likewise between all nearby pipe segments (151), °8 b) through supply to the secondary part (200) during the second phase of the injection molding, the overflow grooves provided in the primary part (100) during the first phase have been used (113), corresponding to the connecting tabs (213), which extend from the intermediate seal (210) to the first adjacent ring segment (251) as well as between all adjacent ring segments (251) and - if desired - from the outermost ring segment (251) to the end seal (280). 17. Device according to claim 16, characterized in that the grip contours (153) located on the outside of the pipe segments (151) serve to fix the pipe segments (151) during the second phase of the injection molding, to prevent the displacement of the pipe segments (151) in the injection molding tool . 19. Device according to one of claims 15 to 17, characterized in that the primary part (100) is injection molded in a thermoplastic - preferably polypropylene - and the secondary part (200) is injection molded from a rubber-like material - preferably a thermoplastic elastomer.