DE102010009618A1 - Connection device for installation system, has annular body with flat axial front surface and circumferential groove is inserted into front surface for incorporation of sealing device - Google Patents

Abstract

The connection device has an annular body (16) with a flat axial front surface (17). A circumferential groove (18) is inserted into the front surface for incorporation of a sealing device and a circumferential radial clamping groove (11) is inserted into the annular body (16) for incorporation of a clamping device. The clamping device has two semi-circular U-profiles with joint lugs.

Description

The invention relates to a connection device for an installation system with a fitting, wherein an end portion of a tube is pushed onto an inner pipe support of the fitting and fixed with the tube support and the end portion of the tube at least in a partial section comprehensive and applied to an annular shoulder of the fitting compression sleeve and wherein on the fitting on the opposite side to the inner pipe support, the connection device is arranged.

Such a connection device for an installation system with a fitting is from the US 3,549,180 known. This connection device is attached to a made of a metallic material fitting, wherein the fitting is a deferred tube is connected using a compression sleeve. In this case, the compression sleeve has an inwardly angled annular fold, which engages in a disposed between an inner and an outer annular shoulder recess of the fitting. Subsequent to the outer annular shoulder includes a neck-shaped portion on which a union nut is pushed, which in turn rests with an annular flange on a contact shoulder, which is incorporated on one side in the neck-shaped portion of the fitting. The union nut forms the connecting device together with the contact shoulder.

The invention has for its object to provide a connection device for an installation system with a fitting, which offers a high level of installation safety and easy handling with simple production and is compact overall.

This object is achieved in that the connecting device has an annular body with a plane axial end face into which a circumferential groove for receiving a sealing device is embedded and in that in the annular body a circumferential radial clamping groove for receiving a clamping device is inserted. Thus, a compact design connection device is provided, which is also easy to produce. When mounting two connection devices, such as fittings, after at least in a circumferential end groove of a connection device, a sealing device has been used, held against each other with the end faces and inserted into the opposite clamping grooves one or more clamping devices for connecting the two connection devices. Of course, with the connection device according to the invention for an installation system, a fitting with any other connection body, reducer or connector, such as a bow or a tee, are connected.

In a further development of the invention, the clamping device has two semi-annular U-profiles. Thus, a clamping device is provided, which can be used with ease of handling over the entire circumference of a clamping force applying in opposite clamping grooves.

In a further embodiment of the invention, the U-profiles on the end hinge eyes. In turn, in a further development, the two U-profiles by means of a bolt used in two cooperating hinge eyes forming a joint with each other. In this case, in a further embodiment of the invention, the hinge eyes are arranged transversely to the U-profiles so that two mutually pivoted U-profiles form a ring, wherein the free legs of the U-profiles are aligned with the interior of the ring. As a result, an easy-to-use clamping device is provided which is easy to handle during assembly by first a first U-profile is inserted into the clamping grooves of the connecting devices to be connected and then the second U-profile is pivoted until this U Profile fully engages in the clamping grooves. In this case, the free legs of the two U-profiles can be designed so that they exert an increasing pressing force on the components to be connected with progressive impressions in the clamping grooves, which is directed so that the two components are pressed against each other. For this purpose, the two free legs of a U-shaped profile can be aligned at a slightly greater angle than 90 ° to the base leg connecting the two free legs or else be configured in a corresponding ramp shape.

In a further embodiment of the invention, the assembled U-profiles are aligned so that their opposite to the two interconnected by the pin hinge eyes hinge eyelets interlock. In this interlocking hinge eyes is finally a pin or a screw for firm connection of the two U-profiles used. Thus, a durable durable connection of the components to be joined is created, which can not be solved even when shaking the two components. On the other hand, a non-destructive disassembly of the U-profiles is easily possible, for example, in a necessary disassembly by removing the pin or screw.

In a further development of the invention, the U-profiles are preferably made of a metallic material. In particular non-corroding metals such as stainless steel or brass come into question here. Basically, it is synonymous possible to produce the U-profiles from a suitable and correspondingly high-quality and resistant plastic material.

In a further embodiment of the invention, the sealing device has a position ring. This used for mounting initially in a circumferential groove of a connection device position ring is formed so that it protrudes from the groove and engages in the alignment of the second connection device to the first connection devices in the groove, thus ensuring a precise alignment of the two components to be connected to each other. In this case, in a general embodiment, the position ring can be designed so that it simultaneously assumes the sealing function. This can be done, for example, by coating with a sealing material. In a development of the invention, the position ring cooperates with at least one seal. As a result, in addition to the orientation of the components to be joined, a particularly reliable sealing of the components relative to one another is achieved.

In a further embodiment of the invention, the seal is an annular-U-seal, abut the free leg ends on the groove bottom of the two opposing grooves of the two components to be joined. The U-seal has on the side facing the position ring on a circumferential notch into which engages a arranged on the position ring circumferential nose. The notch and the nose can be designed so that they form a positive and non-positive connection with each other. In addition or as an alternative to this connection, it is also possible to provide an adhesive connection of the position ring with the U-seal. The U-seal is aligned with its two free sealing legs to the center of the two components, so that a guided through the components medium, which reaches the opposite axial end faces of the components up to the U-seal, the two free sealing legs respectively pushes in the corresponding groove base. As a result, a reliable sealing of the components is ensured to each other, which also automatically adjusts the sealing force in dependence on the pressure of the medium passed through the components. Additionally or alternatively, the two sealing legs of the seal can be widened in a V-shape, so that a reliable sealing takes place solely by compressing the sealing legs when assembling the components to be joined. Finally, it is provided in this embodiment, the region of the groove into which the position ring engages to design slightly deeper than the remaining region of the groove. As a result, an exact guidance of the position ring and thus a precise alignment of the components to be joined is achieved.

In an alternative embodiment, the position ring has two axially opposite mutually offset circumferential recesses, in each of which a sealing ring is inserted. Also by this inventive design a secure seal of the components to be joined is ensured.

Incidentally, the fitting, the other connection body, the reduction piece or the connecting piece is made of a plastic material, in particular polyvinylidene fluoride (P.V.D. F). The material polyvinylidene fluoride has proven to be particularly suitable for the production of such a component. The material has a good temperature resistance and a good aging resistance. Furthermore, no corrosion occurs at the contact points with the pipe to be connected to the fitting, which may for example be made of a metallic material. A special insulation is therefore not necessary. As a result, a fitting is provided which offers high installation security and is easy to handle. If the fitting, the other connecting body, the reduction piece or the connecting piece are made of the same material, a uniform material-technical, in particular thermal behavior of the interconnected components is ensured as a further advantage. Depending on the requirements of the components but also different plastic materials can be used. Also, for example, mechanically highly stressed connection body can be made of a metallic material.

The connecting device according to the invention for an installation system is used in particular in the plumbing and heating industry, but can basically be used for the distribution of any liquids and gases. In particular, with this connection device water pipes, sewers or heating pipes can be easily mounted and connected.

In a further embodiment of the invention, the fittings, the other connection body or the connecting pieces may have different inner diameter, which are interconnected by means of the reduction pieces. Thus, the variety of configurations of the installation system to be provided is significantly reduced, since different pipe diameters are interconnected with simple and similar reduction pieces. In particular, the installation system according to the invention is designed primarily for large pipe diameters, for example 75 mm, 90 mm or 110 mm. Tubes with such diameters are suspended from a ceiling of an (industrial) building. The inventive design results in the particular advantage that even with such pipe diameters easily the press connection technique for connecting the pipes with the corresponding fittings can be applied. The assembly process is as follows: The tube to be presented, which is for example a plastic-metal-plastic composite pipe, is cut to the required length and optionally deburred. Subsequently, the pre-assembled with all components fitting is attached to the cut pipe and inserted with the inner pipe support in the pipe end or pushed outside with the compression sleeve. The insertion or Aufschiebvorgang is controllable by a plurality of recessed on the circumference of the compression sleeve viewing window, which are arranged with a small distance to an annular shoulder to rest for the pipe in the fitting. Subsequently, the pressing jaws of the pressing tool are placed on the compression sleeve, wherein the pressing tool has guide lugs, which engage in the associated clamping groove of the connecting device. This ensures a precise fit of the pressing tool. After the pressing process, in which a triple compression (in the middle between two embedded in the inner pipe support O-rings and each right and left outside of the enclosed area) is used, the thus prepared pipe with another (already attached to the ceiling) pipe , Connecting body, reducer or connector are connected. The particular advantage is therefore that the pressing process can be easily done on the floor of the building.

Further advantageous embodiments of the invention are described in the drawings, are described in more detail in the embodiments illustrated in the figures.

Show it:

1 3 shows a longitudinal section through a connection arrangement of two fittings connected to one another by means of a connecting device designed according to the invention;

2 a longitudinal section through a connecting arrangement according to 1 with a differently configured sealing device,

3 a longitudinal section through a connection arrangement of several exemplary composite reduction parts for connecting components with different pipe diameters,

4 a longitudinal section through a connection arrangement according to 3 with a differently configured sealing device,

5 a perspective view of a connection arrangement according to the 1 and 2 and

6 a perspective view of a connection arrangement according to the 3 and 4 ,

The connection arrangement shown in the figures is used in particular in the plumbing and heating industry, but can in principle be used for the distribution and discharge of any liquids and gases.

In the embodiment according to 1 are two each with a connecting device designed according to the invention 2 provided fittings 1 connected with each other.

Opposite to the connection device 2 every one has a fitting 1 an inner pipe support 3 and a compression sleeve 4 on, which has an annular gap 5 form into which a pipe 6 (for a better overview only on the left side of the 1 shown) is inserted with a pipe end.

To the inner pipe support 3 of the fitting 1 one closes to the connection device 2 adjacent ring shoulder 7 against which the pipe to be mounted 6 is pushed.

The inner pipe support 3 has one to the ring shoulder 7 aligned sawtooth toothing 8th on, by two encircling annular grooves 9 is divided into three sections. In these circumferential grooves 9 be used in the basic assembly of the fitting 1 O-rings 10 (only on the left side of the 1 shown) used. As long as, as well as in 1 is shown, the compression sleeve 4 not yet pressed, ensure the O-rings 10 still no liquid-tight or gas-tight seal of the inner pipe support 3 opposite to the annular gap 5 inserted tube 6 , This is only achieved when the compression sleeve 4 has been pressed by the pressing jaws of a pressing tool. As far as this is not visually recognizable, the non-compressed connection is detected during a test procedure of the corresponding installation by, for example, leaking water (for example, in a plumbing or heating installation). If the installation is to be used for the passage of gas, the installation is checked by applying compressed air. If the compressed air pressure drops over a specified period of time, a fitting is not compressed.

The pressing process takes place in particular in the form of a so-called triple compression, in which the compression sleeve 4 each center in the three sections of the toothing 8th encircling the pipe 6 insoluble on the inner pipe support 3 and the O-rings 10 Deforming and sealing. The pressing tool has end guide lugs, which in a subsequent together with the description of the connecting device 2 still further explained Klemmnut 11 intervention. Since the pressing process in one step before the connection of, for example, two fittings 1 takes place, is the clamping groove 11 , as in 2 shown in the upper half, freely accessible and in particular not yet occupied by a clamping device. Of course, it is also possible that pressing tool at one at the free end of the compression sleeve 4 arranged expansion 12 , which is then designed more pronounced to fix in a well-defined position.

The compression sleeve 4 is on the ring shoulder 7 of the fitting 1 until it rests against a ring nose 13 deferred and with an end clip connection 14 established. This is the compression sleeve 4 preferably around the ring shoulder 7 pressed. The pipe 6 is, as stated, until it rests against the annular shoulder 7 then to the inner pipe support 3 deferred, taking the proper Aufschiebungsvorgang through one or more windows 15 in the compression sleeve 4 is visually verifiable.

The connecting device according to the invention 2 has a ring body 16 with a plane axial end face 17 in which a circumferential groove 18 is embedded for receiving a sealing device. Furthermore, in the ring body 16 the already mentioned circumferential radical clamping groove 11 incorporated.

The sealing device has a position ring 19 on top, with an annular U-seal 20 interacts. The two free sealing legs of the U-seal 20 are spread V-shaped in the uninstalled state and lie in the assembled state close to the respective groove bottom 21 at. The U-seal 20 points to the position ring 19 facing connecting leg a circumferential notch 22 on that with an opposite to the position ring 19 arranged nose 23 interacts. Finally, the area of the groove 18 into the position ring 19 engages, designed slightly deeper than the rest of the groove 18 , This will provide an exact guidance of the position ring 19 and thus a precise alignment of the connecting devices to be connected 2 or fittings 1 reached.

Now become two Fittinge 1 , which in contrast to the representation in 1 with two pipes 6 already been pressed, with insertion of the position ring 19 and the annular U-seal 20 joined together, carried by the position ring 19 a positionally accurate alignment of the two fittings 1 to each other. For permanent connection then the clamping device for connecting the connecting devices 2 assembled. The clamping device has two semi-annular U-profiles 24 on. The two U-profiles 24 have two mutually cooperating joint eyelets on both ends 25a . 25b on, on one end during the basic assembly of the U-profiles 24 through a bolt 26 are hinged together. This is in the upper half of the 1 shown here, where here is a U-profile 24 in the two clamping grooves 11 the two connection devices 2 is inserted while the second U-profile 24 unfolded to the first U-profile 24 is shown. After the first U-profile 24 in the clamping grooves 11 is inserted, the second U-profile 24 also in the clamping grooves 11 used as in the lower half of the 1 is shown. Then of course that is in the upper part of the 1 illustrated second U-profile 24 no longer in the unfolded position shown. After the two U-profiles 24 in the clamping grooves 11 are used, which are on the respective second end of the respective U-profile 24 existing and then cooperating joint eyes 25a . 25b firmly connected by inserting a pin or a screw.

In the embodiment according to 2 is in contrast to the embodiment according to 1 the sealing device designed differently. Again, the sealing device has a position ring 19a on, this fills the groove 18 but completely out. On his opposite and each to the bottom of the groove 21 of the respective ring body 16 Sides, the position ring 19a circumferential and mutually offset depressions 27 on, in each case a sealing ring 28 is used. The sealing rings 28 have a diameter that is slightly larger than the depth of the recess. The supernatant thus caused in the unassembled state when inserting the semi-annular U-profiles 24 in the clamping grooves 11 by the resulting compression of the two annular bodies 16 for making a tight connection of the cooperating components within the recess 27 deformed.

3 shows a longitudinal section through a connection arrangement of several exemplary composite reduction parts 28 for connecting fittings 1 with each other or with other connection bodies or connecting pieces, for example, bends or T-pieces. In 3 are three reduction parts 28 assembled to the interaction of the respective sealing devices, which in this embodiment analogous to the 1 as with a U-seal 20 cooperating position rings 19 are trained to represent. In practice, each one reduction part 28 with two adjacent components, such as fittings 1 and / or other connection bodies or connecting pieces, the different pipe diameters have connected. It is also conceivable, of course, two or more reduction stages having different reduction stages 28 to bridge over large pipe diameter transitions.

4 shows one too 3 same arrangement of reduction parts 28 , where according to 2 trained sealing devices are installed.

In 5 is a perspective view of a connection assembly according to the 1 and 2 shown, wherein in the rear region of the two interconnected fittings 1 the first U-profile 24 in the clamping grooves 11 of the two fittings 1 is inserted while the second U-profile 24 is shown in the unfolded position.

6 shows an analogous perspective view 5 , wherein here by way of example composite reduction parts 28 according to the 3 and 4 are shown. Again, this is the first U-profile 24 in the clamping grooves 11 used while each second U-profile 24 is shown in the unfolded position.

LIST OF REFERENCE NUMBERS

1

fitting

2

connection device

3

inner tube carrier

4

compression sleeve

5

annular gap

6

pipe

7

annular shoulder

8th

gearing

9

ring groove

10

O-ring

11

clamping groove

12

widening

13

ring nose

14

clip connection

15

window

16

ring body

17

face

18

groove

19, 19a

position ring

20

U-seal

21

groove base

22

notch

23

nose

24

U-profile

25a, 25b

knuckle

26

bolt

27

deepening

28

seal

29

reduction part

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 3549180 [0002]

Claims (11)

Connection device for an installation system with a fitting, wherein an end portion of a pipe is pushed onto an inner pipe support of the fitting and fixed with a the tube carrier and the end portion of the tube at least in a portion comprehensive and applied to an annular shoulder of the fitting compression sleeve and wherein on the fitting on the opposite side to the inner pipe support, the connecting device is arranged, characterized in that the connecting device comprises a ring body ( 16 ) with a plane axial end face ( 17 ), in which a circumferential groove ( 18 ) is embedded for receiving a sealing device and that in the annular body ( 16 ) a circumferential radial clamping groove ( 11 ) is embedded for receiving a clamping device. Connecting device according to claim 1, characterized in that the clamping device has two semi-annular U-profiles ( 24 ) having. Connecting device according to claim 2, characterized in that the U-profiles ( 24 ) end articulated eyelets ( 25a . 25b ) exhibit. Connecting device according to claim 3, characterized in that the two U-profiles ( 24 ) by means of a pair of articulated eyelets ( 25a . 25b ) bolt ( 26 ) are connected to one another forming a joint. Connecting device according to claim 4, characterized in that the articulated eyelets ( 25a . 25b ) across the U-profiles ( 24 ) are arranged so that two U-profiles to be pivoted onto each other ( 24 ) form a ring, wherein the free legs of the U-profiles ( 24 ) are aligned with the interior of the ring. Connecting device according to claim 5, characterized in that the free legs of the U-profiles ( 24 ) in the clamping grooves ( 11 ) of two oppositely aligned axial end faces ( 17 ) can be clamped by two connecting devices. Connecting device according to one of claims 2 to 6, characterized in that the U-profiles ( 24 ) are made of a metallic material or high quality plastic. Connecting device according to one of the preceding claims, characterized in that the sealing device is a position ring ( 19 . 19a ) having. Connecting device according to claim 8, characterized in that the position ring ( 19 . 19a ) cooperates with at least one seal. Connecting device according to claim 9, characterized in that the seal is an annular U-seal ( 20 ) is, whose free leg ends at the groove bottom ( 21 ) issue. Connecting device according to one of claims 8 or 9, characterized in that the position ring ( 19a ) two axially opposite mutually offset circumferential recesses ( 27 ), in each of which a sealing ring ( 28 ) is used.

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