DE10157304A1 - Quick-release coupling for domestic pipelines comprises outer sleeve having cylindrical region with different internal diameters and conical region receiving clamping ring and inner sleeve consisting of two almost identical shell parts - Google Patents

Abstract

Quick-release coupling (1) for domestic pipelines comprises a tubular inner part (2), an inner sleeve (3), a clamping ring (5), a toothed ring (6) having partially circular teeth (61), and an outer sleeve (4). The outer sleeve has a cylindrical region with at least two different internal diameters (d1, d2, d3) and a conical region receiving the clamping ring. The inner sleeve consists of two almost identical hemispherical shell parts. Preferred Features: The shell parts are provided with an external thread (36) onto which the outer sleeve provided with an internal thread (41) is screwed. The inner sleeve has fingers (37) with finger surfaces pointing radially outward which are designed so that the toothed ring is supported by the fingers and is held at least in the pre-assembly position.

Description

The invention relates to a quick coupling for pipes comprising a Adapter having a coupling region and a connection region, wherein the Coupling area for coupling with a matching pipe connection part is formed and wherein the connection area for connection with a free End of a pipeline is formed, wherein in the connection area to the End of the pipe around a part-circular toothed ring, a part-circular Clamping cone and a circular connecting sleeve are arranged.

In pipeline construction, especially for piping systems of building services, the means for in-house supply of hot and cold water in the Sanitation and for the heating circuits are increasing Plastic piping used. Especially with heating systems in the floors Inlaid hot water pipes need to be heated for each room at least two clutches are made. For a usual family home About 20 to 30 couplings are necessary. The clutches must be fast, can be produced safely and permanently.

From DE 196 45 853 C1 a generic quick coupling is known. A connection area of an adapter receives the end of a pipeline. The connection area of the adapter comprises from outside to inside conically shaped connecting sleeve, a clamping cone, with the Connecting sleeve cooperates and that of a spring in the axial direction is held under spring tension. The clamping cone points to the pipe facing side toothing elements in the outer wall of the pipe act. The pipe end is inserted into the adapter. When a Locking clip, which holds the spring under tension, is pulled away, pushes the Spring the clamping cone with a defined force in the equally conical trained clamping sleeve and the toothed elements engage in the Tube outside wall. This quick release is considered part of a adaptable piping installation system for mediums carrying Piping used for a wide pressure and temperature range. The Quick coupling is composed essentially of metal parts.

Based on this prior art, it is an object of the invention, a Specify quick coupling, which is made up of as few individual parts as possible, which is compatible with the piping system and which is cost effective, both in the manufacture as well as in the assembly on the construction site, manufactured can be. The quick coupling should also without the aid of Installation tools a completely secure and reliable connection guarantee.

This object is achieved by a quick coupling for pipes comprising a Adapter having a coupling region and a connection region, wherein the Coupling area for coupling with a matching pipe connection part is formed and wherein the connection area for connection with a free End of a pipeline is formed, wherein in the connection area to the End of the pipe around a part-circular toothed 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 in the axial direction extending latching fingers, each in radial Direction protruding latching steps, and wherein in the connection area a driving ring for driving the connecting sleeve with respect to the Snap finger axially displaceable and radially latched in relation to the latching steps is arranged.

Preferred developments of the invention will become apparent from the dependent Claims.

It is advantageous that the quick coupling is compatible with the choice of material with the material of the piping system. This is achieved by the fact that the Adapter and the pipe connection part formed substantially of plastic are.

It is also advantageous that the quick coupling of as few items is constructed and that the assembly of the quick coupling with the Piping system on the construction site includes as few steps as possible. this will achieved in that the driving ring part-circular openings with Has latching noses, projecting in the radial direction in the openings are arranged, wherein the latching fingers in the axial direction in the openings are arranged receiving and wherein the locking lugs with the locking steps for Locking in the radial direction are arranged cooperatively.

It is also beneficial that the right assembly on the job site can be easily checked and thus ensures high reliability can be. This is achieved by the locking lugs and the latching steps are formed such that when connecting the adapter to the end of the Pipeline an audible or tactile signal to detect the safe Connection of the adapter is discharged with the end of the pipe. This is also achieved in that in the connecting sleeve at least one Viewing window is designed to observe the secure connection of the Adapters with the end of the pipeline.

Embodiments of the invention will be described with reference to the figures. It demonstrate:

Fig. 1 is a partially sectioned view of a detail of a pipeline system with two quick-action couplings according to the invention,

FIG. 2 shows a view of the detail of the pipeline system of FIG. 1 in the assembled state, FIG.

Fig. 3 is a section through an adapter of the quick couplings of FIGS. 1 and 2 prior to assembly,

Fig. 4 is a section through the adapter of Fig. 3 in a first stage of assembly,

Fig. 5 is a section through the adapter of FIG. 4 in a final stage of assembly,

Fig. 6 is a section through the adapter of FIG. 5 in a loaded with medium pressure pipeline system,

Fig. 7. , ,

Fig. 8. , ,

Fig. 9. , ,

In Fig. 1, a section of a piping system is shown with two quick couplings. The quick coupling is constructed from an adapter 1 , 1 'and a pipe connection part. 2 The adapter 1 , 1 'consists of a coupling region 3 which is complementary to a coupling receiving region 4 of the pipe connecting part 2 and of a connecting region 5 . Due to the complementary design of the adapter 1 , 1 'and the pipe connecting part 2 , a pipe connection can be made easily and quickly. The connection region 5 of the adapter 1 serves for connection to one end 6 of a pipeline 7 and will be described in greater detail with reference to FIGS. 3 to 6. The piping system of FIG. 1 comprises a T-shaped pipe connection part 2 with the possibility of connecting the ends 6 of three pipes 7 . The pipes 7 may be made of plastic, of metal plastic composite materials or of light metal materials.

In Fig. 1, two pipe ends 6 are shown connected to two at an angle of 90 ° to each other arranged coupling receiving areas 4 , 4 'connectable. With the third coupling receiving portion 4 "no pipe but a blanking plug 8 is shown connected. The embodiment of Fig. 1 shows that with the combination of a T-shaped pipe connection part 2 and a sealing plug 8 different arrangements may be connected by pipe ends 6 with each other. It It is also conceivable that the coupling receiving areas 4 , 4 ', 4 "have different inner line diameters, so that pipelines with different diameters can be connected to each other. Because of this high adaptability to different operating conditions, the pipe connection part 2 is therefore also referred to as module 2 . The blind plug 8 has a coupling region 3 ", which is of identical construction to the coupling region 3 , 3 'of the adapter 1 , 1 '.

In Fig. 2, the detail of the piping system of Fig. 1 again, but shown here in the assembled state. Viewing windows 9 , 9 'are shown in the connecting regions 5 , 5 '. Through these viewing windows 9 , 9 'can be observed that the connection process of the adapter 1 with the tube 7 is completely completed and that a secure connection was made.

Based on the sections of Fig. 3 to 6, the connection process of the pipe end 6 is described with the adapter 1 in the individual phases of the process.

In Fig. 3 the end 6 of a pipe 7 and an adapter 1 are shown.

The adapter 1 is shown as it is delivered to the site. The adapter 1 consists of the connecting region 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 of the pipe 7 made of plastic is calibrated inside before assembly, that is adjusted to the correct inner diameter and chamfered from the end on the inside to form a chamfer 10 . In the connection region 5 of the adapter 1 , seen from the inside outwards, the following items can be seen: a driving ring 11 , a toothed ring 12 , a clamping cone 13 and a connecting sleeve 14th

In the connecting region 5 of the adapter 1 , at least two locking fingers 15 are formed. On the border between the connection region 5 and the coupling region 3 , a stop 16 is formed, which serves as a limitation of the axial movement of the connection sleeve 14 with respect to the connection region 5 of the adapter 1 . The stop 16 is formed like a completely continuous annular projection on the outer circumference of the adapter 1 . The driving ring 11 is suitably arranged in a groove 17 on the inside of the connecting sleeve 14 . The fit between the connecting sleeve 14 and driving ring 11 is so accurate that with an axial movement of the driving ring 11, the connecting sleeve 14 participates in the same axial movement. Both the driving ring 11 and the connecting sleeve 14 are continuously formed at least in the region of the groove 17 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 the transmission of forces that must be applied for the assembly.

The driving ring 11 is formed as an annular disc. 11 In the annular disc 11 part- circular and continuous openings 18 are recessed in the axial direction. For each latching finger 15 , an opening 18 is provided in each case. The latching fingers 15 are arranged on a circle at a distance from the inner wall of the connecting region 5 . It can be formed two, three or more locking fingers 15 , which all extend in the axial direction of the adapter 1 . The latching fingers 15 have a plurality of latching steps 19 , which are formed on the latching fingers 15 in the radial direction protruding. The driving ring 11 has in the openings 18 each have a latching lug 20 which are formed in the radial direction inwardly projecting and which cooperate with the latching steps 19 of the latching fingers 15 .

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 its circumference, so that when a force acts in the radial direction on the toothed ring 12 and on the clamping cone 13 , these change in diameter, that is, can taper. The toothed ring 12 is fitted in a recess 21 on the inside of the clamping cone 13 . The toothed ring 12 and the clamping cone 13 thus also form a stable unit. At a pressure on the clamping cone 13 from outside to inside, the diameter of the toothed ring 12 will decrease. 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, like all other components of the quick coupling made in an injection molding of plastic.

In the delivery state, the clamping cone 13 is located within the connecting sleeve 14 on a circle with the largest possible diameter. The driving ring 11 , which entrains the connecting sleeve 14 in the axial direction, is located with the locking lugs 20 in locking with that of the latching steps 19 , which is seen in the axial direction furthest away from the coupling portion 3 . The end face of the driving ring 11 is at the same height or slightly higher than the end face of the latching fingers 15th The clamping cone 13 rests on the end face of the driving ring 11 . In Fig. 3 are O-ring seals, which can be arranged in further circumferential grooves for sealing the medium to the outside, omitted.

In Fig. 4, the adapter 1 is placed with the connecting portion 5 straight on the end 6 of the pipe 7 in comparison to FIG . At the construction site, the installer with one hand will take the free end 6 of the already laid flexible plastic pipe 7 , bend away from the wall or from the floor as far as necessary for processing and with the other hand the adapter 1 to the pipe end 6 attach. In the state shown in Fig. 4, no pressure has yet been exerted on the end 6 or on the adapter 1 . The end 6 of the pipe 7 just touches the driving ring 11 and the clamping cone 13 has not been moved axially. In the state of Fig. 4 as in the state of Fig. 3 in the viewing window 9 still the clamping cone 13 is visible. It can thus be observed through the viewing window 9 that the clamping cone 13 has not yet moved with respect to the connecting sleeve 14 .

In Fig. 5, the adapter 1 is shown again, but after plugging on the pipe 7 and after compression. The adapter 1 with the latching fingers 15 in the connection region 5 was pushed as far as possible through the opening 18 . The latching lug 20 of the driving ring 11 in this case skips the latching steps 19 of the latching fingers 15 . The skipping of the latching steps is perceived by the installer as an audible and tactile signal. Because before the impact movement, the end 6 of the pipe 7 rests on the driving ring 11 , is moved as a result of the impact movement of the clamping cone 13 with respect to the connecting sleeve 14 and with respect to the pipe 7 in the axial direction. With respect to the connection sleeve 14 , the pipe 7 does not move between the state of FIG. 4 and the state of FIG. 5. Only the adapter 1 with the latching fingers 15 and the clamping cone 13 move with respect to the pipe. 7 The adapter 1 is inserted into the connection sleeve 14 until it stops 16 . Because the clamping cone 13 is conically formed on the outside, and because the connecting sleeve 14 is also formed conically on the inside, the clamping cone 13 and thus the toothed ring 12 as a result of this axial movement in the radial direction, ie in the direction of the outer wall the pipe 7 , compressed. In contrast to many other quick couplings, such as those with bayonet or cap nut, the coupling is not produced by a rotary or screwing movement, but by a linear impact movement. The adapter 1 is plugged with a shock in the axial direction on the end 6 of the pipe 7 and can be connected without tools first with the pipe 7 and then with the pipe connection part 2 or with the module 2 .

The toothed ring 12 made of metal has on the inner circumference a distributed arranged plurality of teeth 22 , of which in Fig. 5, two teeth 22 can be seen. The teeth 22 made of metal cut into the outer wall of the plastic pipe 7 a. In the viewing window 9 , the clamping cone 13 is no longer visible. By observing the audible and tactile signal of the latching lugs 20 , which skip the latching steps 19 and the observation of the viewing window 9 , the installer can make sure that the adapter 1 has been securely and completely connected to the end 6 of the pipe 7 . In the viewing window, or in the viewing windows 9 , no clamping cone 13 , but only the locking fingers 15 or, depending on the angular position of the connecting sleeve 14 with respect to the latching fingers 15 , the outer wall of the tube 7 can be seen. In the state of Fig. 5, the piping system is still pressureless, that is, the adapter has not been connected to the pipe connection part 2 or the module 2 and there is no media pressure on the piping system.

In Fig. 6, the connection of the adapter 1 with the end 6 of the pipe 7 is shown again. In the state of FIG. 6, in contrast to the state of FIG. 5, the adapter 1 has been connected to the pipe connection part 2 , which is not shown here, and the medium pressure has been applied to the pipeline system. Due to the medium pressure, the pipe 7 and the clamping cone 13 are slightly pushed out of the adapter 1 . In Fig. 6, this state is slightly exaggerated drawn to better understand the circumstances. Due to the extension movement of the clamping cone 13 as a result of the pressure increase, which is held radially by the connecting sleeve 14 , the diameter will be further reduced. The teeth 21 of the toothed ring 12 will continue to cut into the outer wall of the pipe end 6 . In the areas of the toothed ring 12 , where no teeth 22 are punched away inwardly, the toothed ring has a substantially cylindrical profile and will rest flat against the outer wall of the pipeline 7 . The special profile of the toothed ring 12 prevents the metal teeth 22 from cutting too deeply into the plastic material. The special design of the inner wall of the clamping cone 13 with an equally cylindrical portion and other plastic teeth 23 helps that the teeth 22 , 23 do not cut deeper than a well-defined depth in the plastic material. This prevents that at excessive extraction force the pipe end 6 is cut off from the metal teeth 22 .

In Figs. 7 to 9 further application examples of the quick coupling are shown. Fig. 7 shows the quick coupling of FIGS. 1 to 6 in connection with a connection 25 for fittings in the sanitary sector.

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

In Fig. 9, two adapters 1 and two modules 2 are shown, which are connected to each other by means of an intermediate piece 32 . The intermediate piece 32 has on two opposite sides coupling portions 35 which are formed identically as the coupling portions 5 of FIGS. 1 to 6. This is intended to indicate that manufactured with any number of modules 2 and spacers 32 so-called manifolds or manifolds can be. Instead of a further module 2 , a transition piece 36 with a thread, for example an external thread, can be plugged onto the intermediate piece 32 . The formation of the coupling region 35 is shown in FIG. 9 with four outer part-circular and resilient regions 38 with latching hooks 39 . The detent hooks 39 in FIG. 9 point radially inward, but they can also be designed to point outward in accordance with the reverse configuration of the coupling region 35 .

Claims (6)

A quick coupling for pipes comprising an adapter ( 1 ) with a coupling portion ( 3 ) and a connecting portion ( 5 ), wherein the coupling portion for coupling with a mating pipe connection part ( 2 ) is formed and wherein the connecting portion ( 5 ) for connection to a free End ( 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 connecting region a driving ring ( 11 ) for driving the connecting sleeve ( 14 ) with respect to the latching fingers ( 15 ) axially displaceable and with respect to the rast tufen ( 19 ) is arranged radially latched. 2. 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 ) in the axial Direction in the openings are arranged receivable and wherein the latching lugs ( 20 ) with the latching steps ( 19 ) are arranged cooperatively for locking in the radial direction. 3. quick coupling for pipes according to claim 1 or 2, characterized in that the latching lugs ( 20 ) and the latching steps ( 19 ) are designed such that when connecting the adapter ( 1 ) to the end ( 6 ) of the pipe ( 7 ) an audible or tactile signal is issued to detect the secure connection of the adapter to the end of the pipeline. 4. 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 ). 5. 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 from plastic. 6. 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.