DE10157304B4 - Quick coupling for pipes - Google Patents

Abstract

A quick coupling for pipes comprising an adapter (1) with a coupling region (3) and a connection region (5), the coupling region being designed for coupling with a fitting pipe connection part (2) and the connection region (5) for connection to a free end (5). 6) of a pipe (7) is formed, wherein in the connection area around the end of the pipe around a part-circular toothed ring (12), a part-circular clamping cone (13) and a circular connecting sleeve (14) are arranged, characterized in that the adapter (1 ) in the connecting region (5) at least two arranged on a circle and extending in the axial direction locking finger (15) each having in the radial direction protruding latching steps (19), and that in the connection area a driving ring (11) for driving the connecting sleeve (14) axially displaceable relative to the latching fingers (15) and radially latchable relative to the latching steps (19) t is.

Description

The The invention relates to a quick coupling for pipes comprising an adapter with a coupling region and a connection region, wherein the coupling portion for coupling with a mating Pipe connection part is formed and wherein the connection area designed for connection to a free end of a pipeline is, being in the connection area around the end of the pipeline around a part-circular toothed ring, a part-circular Clamping cone and a circular connecting sleeve are arranged.

in the Pipeline construction, in particular for Piping systems of building services, that is for the in-house Supply of hot and cold water in the sanitary area and for the heating circuits increasingly used plastic piping. Especially with heating systems with inserted in the soil Hot water pipes need for every heatable Space at least two clutches are made. For a usual Family house are about 20 to 30 clutches necessary. The couplings have to can be produced quickly, safely and permanently.

From the DE 196 45 853 C1 is a generic quick coupling known. A connection area of an adapter receives the end of a pipeline. The connecting portion of the adapter comprises, from the outside inwards, a conically shaped connecting sleeve, a clamping cone which cooperates with the connecting sleeve and which is held in spring tension by a spring in the axial direction. The clamping cone has on the side facing the tube toothing elements which act in the outer wall of the tube. The pipe end is inserted into the adapter. When a locking clip, which holds the spring under pretension, is pulled away, the spring pushes the clamping cone with a defined force into the likewise conically shaped clamping sleeve and the toothed elements engage in the tube outer wall. This quick coupling is used as part of an adaptable piping installation system for medium pressure pipelines for a wide range of pressure and temperature. The quick coupling is composed essentially of metal parts.

outgoing From this prior art, it is an object of the invention, a Specify quick coupling, the least possible individual parts constructed, which is compatible with the piping system and the cost-effective, both in the manufacture and in the assembly on site can be. The quick coupling should also without the aid of Installation tools a completely secure and reliable connection guarantee.

These Task is solved through a quick coupling for Tubes comprising an adapter with a coupling region and a Connection area, wherein the coupling area for coupling with is formed a mating pipe connection part and wherein the connection area for connection to a free end of a pipeline is formed, wherein in the connection area around the end of the pipeline around a part-circular Tooth ring, a part-circular Clamping cone and a circular connecting sleeve are arranged, wherein the adapter in the connection area at least two arranged on a circle and extending in the axial direction Detent finger with protruding in the radial direction latching steps and wherein in the connecting region a driving ring for Take the connection sleeve axially displaceable with respect to the latching fingers and with respect to the locking steps is arranged radially locked.

preferred Further developments of the invention will become apparent from the dependent claims.

It It is an advantage that the quick coupling is compatible with the choice of material is with the material of the piping system. This will be done achieved that the adapter and the pipe connection part substantially are made of plastic.

It is also advantageous that the quick coupling out as possible few items is constructed and that the assembly of the quick coupling with the pipeline system on the construction site includes as few steps as possible. This is achieved in that the driving ring part-circular openings having locking lugs in the radial direction in the openings are arranged projecting, wherein the latching fingers in the axial direction are arranged receivable in the openings and wherein the latching noses cooperating with the latching steps for locking in the radial direction are arranged.

It Another advantage is that the right assembly on the Construction site can be checked easily can and so high reliability guaranteed can be. This is achieved in that the locking lugs and the latching steps are designed such that when connecting the Adapters with the end of the pipe an audible or tactile Signal for detecting the secure connection of the adapter to the End of the pipeline is discharged. This is also achieved by that in the connection sleeve at least one viewing window is designed to observe the secure connection of the adapter to the end of the pipeline.

embodiments The invention will be described with reference to the figures. Show it

1 a partially cutaway view of a section of a pipeline system with two quick couplings according to the invention,

2 a view of the section of the pipeline system of 1 in assembled condition,

3 a section through an adapter of the quick couplings of 1 and 2 before assembly,

4 a section through the adapter of 3 in a first phase of assembly,

5 a section through the adapter of 4 in a final phase of assembly,

6 a section through the adapter of 5 in a medium-pressure piping system,

7 a view of the quick coupling from the 1 to 6 in connection with a valve connection,

8th a view of a pipe joint part with two different sized quick couplings and

9 a view of a modular pipe joint part with two inventive quick couplings.

In 1 is a section of a piping system shown with two quick couplings. The quick coupling is made up of an adapter 1 . 1 and a pipe joint part 2 , The adapter 1 . 1' consists of a coupling area 3 which is complementary to a coupling receiving area 4 of the pipe connecting part 2 and from a connection area 5 , Due to the complementary design of the adapter 1 . 1' and the pipe connecting part 2 can be easily and quickly made a pipe connection. The connection area 5 of the adapter 1 serves to connect to one end 6 a pipeline 7 and is explained in detail on the basis of 3 to 6 described in more detail. The piping system of 1 comprises a T-shaped pipe connection part 2 with the possibility of connecting the ends 6 of three pipelines 7 , The pipelines 7 can be made of plastic, of metal plastic composite materials or of light metal materials.

In 1 are two pipe ends 6 with two at an angle of 90 ° to each other arranged coupling receiving areas 4 . 4 ' connected shown. With the third clutch receiving area 4 '' is not a pipeline but a blind plug 8th connected shown. The embodiment of 1 shows that with the combination of a T-shaped pipe connection part 2 and a blind plug 8th different arrangements of pipe ends 6 can be connected with each other. It is also conceivable that the coupling receiving areas 4 . 4 ' . 4 '' Have different inner pipe diameters, so that pipes with different diameters can be connected to each other. Because of this high adaptability to different operating conditions, the pipe connection part 2 therefore also as a module 2 designated. The blind plug 8th has a coupling region 3 '' on, which is identical to the coupling region 3 . 3 ' of the adapter 1 . 1' ,

In 2 is the section of the piping system of 1 again, but shown here in the assembled state. In the connection areas 5 . 5 ' are viewing windows 9 . 9 ' shown. Through these windows 9 . 9 ' can be observed that the connection process of the adapter 1 with the pipeline 7 is completely completed and that a secure connection has been made.

Based on the cuts of 3 to 6 becomes the connection process of the pipe end 6 with the adapter 1 described in the individual phases of the process.

In 3 are the end 6 a pipeline 7 and an adapter 1 shown.

The adapter 1 is shown as it is delivered to the construction site. The adapter 1 consists of the connection area 5 and in the axial direction adjacent to the coupling region 3 and is essentially made of plastic materials, for example in an injection molding process. The end 6 the pipeline 7 made of plastic is calibrated inside before assembly, that is adjusted to the correct inner diameter and from the end on the inside to form a chamfer 10 chamfered. In the connection area 5 of the adapter 1 are, seen from the inside out, the following items: a driving ring 11 , a toothed ring 12 , a clamping cone 13 and a connection sleeve 14 ,

In the connection area 5 of the adapter 1 are at least two catch fingers 15 educated. On the border between the connection area 5 and the coupling area 3 is a stop 16 designed as limiting the axial movement of the connecting sleeve 14 in relation to the connection area 5 of the adapter 1 serves. The stop 16 is like a completely continuous annular projection on the outer circumference of the adapter 1 educated. The driving ring 11 is fitting in a groove 17 on the inside of the connecting sleeve 14 arranged. The fit between connection sleeve 14 and driving ring 11 is so accurate that at an axial movement of the driving ring 11 the connection sleeve 14 the same axial movement participates. Both the driving ring 11 as well as the connection sleeve 14 are at least in the area of the groove 17 formed continuously over the entire circumference and form a stable and resilient composition. This composition is used in the assembly of the adapter 1 with the pipe end 6 for transmitting the forces that must be applied for the assembly.

The driving ring 11 is designed like an annular disk. In the annular disc are part-circular and in the axial direction continuous openings 18 spared. For every finger 15 is each an opening 18 intended. The catch fingers 15 are on a circle at a distance from the inner wall of the connection area 5 arranged. It can be two, three or more locking fingers 15 be formed, all in the axial direction of the adapter 1 extend. The catch fingers 15 have several click stops 19 on, on the latch fingers 15 are formed protruding in the radial direction. The driving ring 11 points in the openings 18 one catch each 20 on, which are formed in the radial direction inwardly projecting and with the latching steps 19 the latch fingers 15 interact.

The toothed ring 12 and the clamping cone 13 are part-circular, that is not completely formed throughout. The toothed ring 12 and the clamping cone 13 are made open on a part of their circumference, thus, when a force in the radial direction on the toothed ring 12 and on the clamping cone 13 acts, these can change in diameter, that is rejuvenate, can. The toothed ring 12 is fitted into a recess 21 on the inside of the clamping cone 13 , The toothed ring 12 and the clamping cone 13 thus form a stable unit. At a pressure on the clamping cone 13 From outside to inside, the diameter of the toothed ring becomes 12 reduce. The toothed ring 12 is made of a metal band by punching, cutting and bending and has a profile that is tailored to the tasks of the toothed ring. The clamping cone 13 is made, like all other components of the quick coupling in an injection molding of plastic.

The delivery cone contains the clamping cone 13 inside the connection sleeve 14 on a circle with the largest possible diameter. The driving ring 11 that the connecting sleeve 14 in the axial direction, is located with the locking lugs 20 in lock with that of the Raststufen 19 , Seen in the axial direction furthest from the coupling region 3 is removed. The end face of the driving ring 11 is at the same height or slightly higher than the front side of the latch finger 15 , The clamping cone 13 lies on the front side of the driving ring 11 on. In the 3 are O-ring seals, which can be arranged in other circumferential grooves for sealing the medium to the outside, omitted.

In 4 is compared to 3 the adapter 1 with the connection area 5 straight to the end 6 the pipeline 7 placed. At the construction site, the installer becomes the free end with one hand 6 the already laid flexible pipe 7 take plastic, bend away from the wall or from the floor as far as necessary for processing and with the other hand the adapter 1 on the pipe end 6 Attach. In the state in 4 is shown, there was no pressure on the end 6 or on the adapter 1 exercised. The end 6 the pipeline 7 just touches the driving ring 11 and the clamping cone 13 has not been moved axially. In the state of 4 is like in the state of 3 in the viewing window 9 still the clamping cone 13 visible, noticeable. Through the viewing window 9 can thus be observed that the clamping cone 13 in relation to the connection sleeve 14 has not moved yet.

In 5 is the adapter 1 again, but after attaching to the pipeline 7 and after squeezing, shown. The adapter 1 with the snap fingers 15 in the connection area 5 as far as possible through the opening 18 encountered. The catch 20 of the driving ring 11 skips the rest steps here 19 the catch finger 15 , The skipping of the latching steps is perceived by the installer as an audible and tactile signal. Because before the shock movement the end 6 the pipeline 7 on the driving ring 11 is due to the impact movement of the clamping cone 13 with respect to the connection sleeve 14 and in terms of the pipeline 7 moved in the axial direction. In terms of the connection sleeve 14 the pipeline moves 7 between the state of 4 and the state of 5 Not. Only the adapter 1 with the snap fingers 15 and the clamping cone 13 move in relation to the pipeline 7 , The adapter 1 will be up to the stop 16 in the connection sleeve 14 inserted. Because the clamping cone 13 is conically formed on the outside, and because the connecting sleeve 14 is also conical on the inside, the clamping cone 13 and thus also the toothed ring 12 as a result of this axial movement in the radial direction, ie in the direction of the outer wall of the pipeline 7 , pressed together. Unlike many others Quick couplings, such as those with bayonet or cap nut, the coupling is not made by a rotary or screwing, but by a linear impact movement. The adapter 1 comes with a shock in the axial direction on the end 6 the pipeline 7 plugged and can without tools first with the pipeline 7 and then with the pipe connection part 2 get connected.

The toothed ring 12 made of metal has on the inner circumference a distributed arranged plurality of teeth 22 on, from in 5 two teeth 22 can be seen. The teeth 22 made of metal cut into the outer wall of the plastic pipeline 7 one. In the viewing window 9 is the clamping cone 13 no longer visible. By observing the audible and tactile signal of the locking lugs 20 that the rest stops 19 skip and through the observation of the viewing window 9 the installer can make sure that the adapter 1 safe and complete with the end 6 the pipeline 7 was connected. In the viewing window or in the viewing windows 9 , is not a clamping cone 13 , but only the locking fingers 15 or, depending on the angular position of the connecting sleeve 14 in relation to the latch fingers 15 , the outer wall of the pipe 7 seen. In the state of 5 If the piping system is still pressureless, that means the adapter has not yet been connected to the pipe connection part 2 connected and there is no medium pressure on the piping system.

In 6 is the connection of the adapter 1 with the end 6 the pipeline 7 shown again. In the state of 6 was contrary to the state of 5 the adapter 1 with the pipe connection part, not shown here 2 connected and the pipeline system pressurized with medium pressure. The medium pressure causes the pipeline 7 and the clamping cone 13 easily out of the adapter 1 forced out. In 6 This state is slightly exaggerated drawn to better understand the circumstances. By the extension movement of the clamping cone 13 as a result of the pressure increase coming from the connecting sleeve 14 held radially, the diameter will decrease further. The teeth 22 of the toothed ring 12 continue into the outer wall of the pipe end 6 incise. In the areas of the toothed ring 12 where no teeth 22 punched away inwardly, the toothed ring has a substantially cylindrical profile and will be flat on the outer wall of the pipeline 7 invest. The special profile of the toothed ring 12 prevents the metal teeth 22 cut too deeply into the plastic material. Also, the special design of the inner wall of the clamping cone 13 with an equally cylindrical area and other plastic teeth 23 contributes to the teeth 22 . 23 do not cut deeper than a well-defined depth into the plastic material. This prevents that at too high pull-out force the pipe end 6 from the metal teeth 22 is cut off.

In the 7 to 9 Further examples of use of the quick coupling are shown. 7 shows the quick release from the 1 to 6 in connection with a connection 25 for sanitary fittings.

8th shows a pipe connection part 2 with a blind plug 8th and two adapters 1 . 31 , The adapter 31 has a larger diameter than the adapter 1 , This is to indicate that reductions or transitions with different diameters can be made using the same module. The module can be made of plastic or metal and is thus adaptable to different pipe materials.

In 9 are two adapters 1 and two modules represented by means of an intermediate piece 32 be connected to each other. The intermediate piece 32 has coupling areas on two opposite sides 35 on, which are identical to the coupling areas 5 from the 1 to 6 , This is intended to indicate that with any number of modules and spacers 32 It is also possible to produce so-called manifolds or distributor valves. Instead of another module can also be a transition piece 36 with a thread, for example an external thread, on the intermediate piece 32 be plugged. The formation of the coupling region 35 is in 9 with four outer part-circular and resilient areas 38 with snap hook 39 shown. The locking hooks 39 in 9 have radially inward, but can be in accordance with the reverse configuration of the coupling region 35 also be executed to the outside.

Claims (6)

Quick coupling for pipes comprising an adapter ( 1 ) with a coupling region ( 3 ) and a connection area ( 5 ), wherein the coupling region for coupling with a mating pipe connection part ( 2 ) and wherein the connection area ( 5 ) for connection to a free end ( 6 ) of a pipeline ( 7 ), wherein in the connection region around the end of the pipeline around a part-circular toothed ring ( 12 ), a part-circular clamping cone ( 13 ) and a circular connection sleeve ( 14 ), characterized in that the adapter ( 1 ) in the connection area ( 5 ) at least two arranged on a circle and extending in the axial direction locking fingers ( 15 ), each with radial Direction protruding Raststufen ( 19 ), and that in the connection area a driver ring ( 11 ) for driving the connecting sleeve ( 14 ) with respect to the latch fingers ( 15 ) axially displaceable and in relation to the latching steps ( 19 ) is arranged radially latched. Quick coupling for pipes according to claim 1, characterized in that the driving ring ( 11 ) part-circular openings ( 18 ) with locking lugs ( 20 ), which are arranged projecting in the radial direction in the openings, wherein the latching fingers ( 15 ) are arranged receivable in the axial direction in the openings and wherein the latching noses ( 20 ) with the latching steps ( 19 ) are arranged cooperatively for locking in the radial direction. Quick coupling for pipes according to claim 1 or 2, characterized in that the latching noses ( 20 ) and the latching steps ( 19 ) are formed such that when connecting the adapter ( 1 ) with the end ( 6 ) of the pipeline ( 7 ) an audible or tactile signal is emitted to detect the secure connection of the adapter to the end of the pipeline. Quick coupling for pipes according to one of claims 1 to 3, characterized in that in the connecting sleeve ( 14 ) at least one viewing window ( 9 ) is designed to observe the secure connection of the adapter ( 1 ) with the end ( 6 ) of the pipeline ( 7 ). Quick coupling for pipes according to one of claims 1 to 4, characterized in that the adapter ( 1 ) and the pipe connection part ( 2 ) are formed substantially of plastic. Quick coupling for pipes according to one of claims 1 to 5, characterized in that the adapter ( 1 ) and the pipe connection part ( 2 ) are designed such that the quick coupling of the pipe end can be produced without tools.