DK177086B1 - pipe-fitting - Google Patents

Abstract

The invention relates to a pipe fitting (1) for an insoluble connection between a pipe (2) and a fitting (4), for pipe socket, valve housing or slide valve, fittings, etc., with a pipe adapter (5) and a ring adapter (6) which can be connected with the pipe adapter (5), and with a connecting pipe (9) arranged in the holes (7, 8) of the pipe adapter (5) and the ring adapter (6), which with a pointed end (26) projects beyond the ring adapter (6). In a joining area (10) between the pipe adapter (5) and the ring adapter (6), at least one sealing ring (11) is arranged, for example an O-ring (12), which goes around the connecting pipe (9), whereby the connecting pipe (9) in the joining area (10) is provided with a flange (31) projecting beyond an outer circumference, and an annular receiving chamber (32) is arranged in the pipe adapter (5) and in the ring adapter (6), which receives the flange (31) and tightly rings (11).

Description

in DK 177086 B1

FIELD OF THE INVENTION

The present invention relates to a pipe fitting as described in the preamble of claim 1.

5 From the prior art, pipe fittings are known for a detachable connection between plastic pipes and fittings or adapters, in which the pipe to be connected to an adapter is surrounded by a cut ring which cooperates with a ring groove in the adapter and which by screwing on the adapter by means of of a tube and the ring ring enclosing the nut of the tube penetrates the tube wall with a rotating cutting edge, securely sealing the tube in the adapter 10 and securing it against a pulling force.

From EP 0 238 156 A1, a pipe fitting is known for connecting a pipe and a fitting with a pipe adapter 116 and a ring adapter 140 which can be connected to the pipe adapter. In the through bores of the tube adapter and the ring adapter is provided a connecting tube 132 which protrudes outwardly of the ring adapter 140 with a pointed end and which is formed with a flange in the joint area between the tube adapter and the ring adapter. Opposite end faces form an annular circumferential groove spring assembly 120. The connecting tube 132 is provided in the joint area between the tube adapter and the ring adapter with a flanging ring 13 extending beyond the outer circumference of the connecting tube 116, an annular receiving chamber 127 is arranged in the tube adapter 116. and a sealing ring 122. A retaining ring 127 is disposed between the flange ring 138 and the sealing ring 122 to protect and hold the sealing ring 122 in place.

The object of the invention is to improve the sealing of a pipe fitting by providing a pipe adapter for an insoluble pipe connection with a fitting which ensures, by simple mounting, a pull-safe and tight connection between the pipe and the adapter.

The object of the invention is achieved by the sealing ring enclosing the flange ring. A simplification of the construction is achieved, avoiding the use of a special holding ring 30 as in the prior art. By placing the sealing ring on the flange ring, the sealing ring is radially displaced into the receiving chamber, where the sealing ring is held securely between opposite surfaces of the pipe adapter and the ring adapter, respectively. The surprising advantage of this is that the connecting tube is securely clamped together with the flange in the receiving chamber between the tube adapter and the ring adapter, and that a large retention force acts against any pull-out shaft that may arise in a wire string.

5

This makes it possible for a design according to claim 2, since an accurate axial power transfer is obtained from a pulling force to the ring adapter, and since a simple tool geometry for production tools, especially spraying tools, is possible.

However, a configuration according to claim 4 is also advantageous, since any support sleeve for preventing penetration into the connecting pipe in the event of a pull-out force; ace of spades.

Further, a configuration according to claim 4 is advantageous, whereby the assembly is simplified through the secured prepositioning of the sealing ring and mounting errors are prevented in an efficient manner.

Through the advantageous further design described in claim 5, the influence of the bending forces acting on the connection pipe on the joint between pipe adapter and ring adapter is also significantly reduced.

20

Through the advantageous further designs described in claims 6 to 8, the installation dimensions, ie. the entire length of the pipe fitting, precisely.

A design according to claim 9 is also possible, through which an additional protection against bending forces in the connecting pipe is obtained and wherein existing high safety requirements are met with such a design, in particular by using a pipe connection or pipe connection in the gas pipeline area.

Also advantageous is a design according to claim 10, since a secured press fit for the sealing ring in the receiving chamber is thereby obtained.

3 DK 177086 B1

Through the advantageous further configurations described in claims 11 and 12, penetration into the connecting pipe is prevented effectively the danger of a leak in the pipe fitting. Thus, it is not necessary to use a support sleeve in the connecting pipe. Finally, a configuration according to claim 13 is also advantageous, whereby an immediate connection, according to the embodiment according to the invention, is prepared directly for such an installation, luminaires without further use of screw adapters, flanges etc.

The invention will be explained in more detail below with reference to the Examples 10 with reference to the drawings.

Here shows: | FIG. 1 is a sectional side view of a pipe fitting according to the invention; FIG. 2 is a detailed view of the pipe fitting according to FIG. 1; FIG. 3 shows another embodiment of the pipe fitting at a housing; FIG. 4 shows a further configuration of the pipe fitting at a housing; FIG. 5 shows a further configuration of the pipe fitting; in FIG. 6 is a detailed view of the pipe fitting joint area; in FIG. 7 shows a further embodiment of the pipe fitting, in section; 20 FIG. 8 shows a further embodiment of the pipe fitting, in section.

Initially, it should be noted that the same parts are provided with the same reference numerals and the same design part designations in the variously described embodiments, whereby the descriptions included in the overall description can be transferred to the same parts with the same reference numerals and the same structural member designations. The position indications used in the specification, such as above, below, to the side, etc., refer to immediately described and reproduced figures and must be transferred to the new position in a change of position. In addition, some features and character combinations of the various exemplary embodiments shown and described can reproduce independent, inventive solutions or solutions according to the invention.

4 DK 177086 B1 1 fig. 1 and 2, a pipe fittings 1 exemplified by a connection to a pipe 2, in particular a plastic pipe 3 of a fitting 4, e.g. fittings, housing, drill bracket, etc. are shown. ring adapter 6 and a bore 7, 8 through connecting holes 9, 8 of the pipe adapter 5 and the ring adapter 6 and at least one sealing ring 11 arranged in the joint region 10, for example O-ring 12.

The tube adapter 5 is a hollow cylindrical shaped member which according to the embodiment shown is provided with an outer thread 14 in an end region 13.1 an opposite end region 15 10 is provided with a flange 16. The flange 16 has on the annular end surface 17 facing the annular adapter 6 over this projecting annular, circumferential, cross-sectional, almost trapezoidal, spring 18.

The ring adapter 6 also has a flange 19 which is opposite to the flange 16.1 a ring-shaped end surface 20 is provided with a groove 21 which receives the spring 18 of the tube adapter 5.

This design ensures a high strength centered joint between the pipe adapter 5 and the ring adapter 6.

The through bores 7, 8 of the pipe adapter 5 and the ring adapter 6 have the same in- j

20, which corresponds substantially to an outer diameter 23 of the connecting tube 9 which is received in the through bores 7, 8. This extends beyond the insertion depth 24 into the tube adapter 5 and protrudes over the ring adapter 6 at an opposite end region 25 and, with this end region 25, forms a so-called tip end 26 for connection to the pipeline 2. The insertion depth 24 is limited by the inner diameter 22 of the tube adapter 5 over an abutment means 28 projecting at the longitudinal center axis 27, e.g. split projections. But it is also possible to leave the abutment means 28 annular, whereby an overhang 29 overhanging the longitudinal center axis 27 preferably overhangs a wall thickness 30 on the connecting pipe 9.

For protection against penetration in the connecting tube 9, this is provided in the area of the ring adapter 6 with a circumferential flange ring 31, and the ring adapter 6 has for receiving the flange ring 31 in the through bore 8 an annular receiving chamber 32. Inner | diameter 33 corresponds roughly to the outer diameter of flange 31 34. The height 35 of flange 31 is either the same or greater than the wall thickness 30 of connecting tube 9. Flange ring 31 supports an annular abutment surface 36 against an abutment abutment surface 37 on the receiving chamber 32 whereby the abutment surface 32 36, 37, formed 38, according to this embodiment, are oriented vertically relative to the longitudinal center axis 27.

Thus, the pulling force acting on the pipe fitting 1 - see arrow 39 - is absorbed by the pipe fitting 1.

The sealing ring 11 is disposed on the circumference of the flange ring 31 to which, through a further step in the through bore 8 of the ring adapter 6, an annular circular groove 40 is provided to the sealing ring 11. A cross-section of the groove 40 is slightly smaller than the maximum cross-sectional dimension of the sealing ring 11. through which a press fit is provided in the groove 40 to obtain a reliable sealing effect.

The joining of the tube adapter 5 to the ring adapter 6, in the joining region 10 with the spring 18 and the groove 21, is preferably carried out through a friction weld. Of course, an adhesive is also possible.

20

As further shown in FIG. 1, the connecting end 9 of the connecting pipe 9 must be connected to the pipe 2 through a blunt weld, in particular through the mirror welding known from the state of the art.

25 As can be seen from the dotted lines in FIG. 2, it is of course also possible to place a flange 41, for example a valve housing, a sliding valve, bore hanger etc., in the end region 13 of the pipe adapter 5, for joining with the fixture 4, instead of the outer thread 14.

A similar fastening method to the pipe fitting 1 could consist in the fact that instead of a cylindrical end region 13 comprising flange 41, several fastening loops are distributed over the circumference.

6 DK 177086 B1

The last described designs with the flange 41 and attachment lugs, respectively, are more expensive in terms of tool design for spraying a pipe adapter 5 in plastic material.

5 The design of the joint region 10 with the spring 18 on the pipe adapter 5 and the groove 21 on the ring adapter 6 is one of several different options for enlarging the contact surface between them to obtain a greater strength and at the same time centering the parts relative to each other, ie. to achieve a precise axis escape. Other designs of the interfaces are, of course, also conceivable. However, a rotationally symmetrical design is imperative for jointing mode '' friction welding ', since such a process requires both a jointing pressure and a relative movement between the jointing surfaces, and since this occurs in a specific case through relative rotational movement of the parts towards each other.

In FIG. 3 shows another configuration of the pipe fitting 1. According to this embodiment, the pipe fitting! the adapter 5 formed integrally at a housing 42, e.g., a lower sliding valve 43 on a locking fixture. Such a design enables the immediate connection of the pipeline the ring 2 through the connecting tube 9 and the anchoring thereof between the tube adapter 5 and the ring adapter 6 located at the housing 42 with the flanging 31 located in the ring adapter 20 of the ring adapter 6 with the receiving chamber 10 with the receiving chamber 32 for the flange 31 and the location of the the sealing ring 11 corresponds to the exemplary embodiments already described in the preceding figures.

In FIG. 4 shows, for example, a further embodiment of the pipe fitting 1, where the pipe adapter 5 is arranged immediately at a housing part 44 of a bore bracket 45.

Such a design is particularly suitable for connecting the pipeline 2 immediately to the supply line 46, directly through the placement of the housing part 44, by which a breakthrough in the pipe wall is provided. The further design of the ring adapter 6, the connecting tube 9 with flanging and the sealing ring are similar to the previous examples already described.

7 in DK 177086 B1 In fig. 5 shows a further configuration of the pipe fitting 1. According to this embodiment, the pipe adapter 5 in the end region 15 for connection to a fitting has an internal thread 47. In order to limit the insertion depth 24 for the connecting pipe 9, the stop means 28 according to this embodiment is formed as a stop ring 48.

5

The design of the joint region 10 between the pipe adapter 5 and the ring adapter 6 with the holding of the connecting pipe 9 by means of the flange ring 31 and the sealing ring 11 surrounding the flange ring 31 corresponds to the designs described in the previous examples.

10

Furthermore, this embodiment shows a possible welding joint between the connecting pipe 9 and the pipe 2 by means of a tip end 26 and the pipe 2 comprising welding sleeve 49 in the area of the attack point 50. The welding sleeve 49 is provided with an electric current impermeable to heat coil 51. 15, a fusion process is formed to form a welding layer 52 between the inner wall of the welding sleeve 49 and the end wall 26 and the outer wall of the pipe 2, respectively. In FIG. 5, it is further evident that in the connecting pipe 9, which overlaps the joint region 10, a support sleeve 53, in particular a thin-walled metal sleeve, is arranged. Through this, in the presence of a pull-out force 20 - see arrow 54 - radial penetration into the connecting tube 9 towards the longitudinal center axis 27 is effectively prevented, whereby the flange 31 at greater pull-out forces - see arrow 54 - is not.

comes out of engagement with the take-up chamber 32 of the ring adapter 6.

In FIG. 6, a further embodiment of the pipe fitting 1 is shown, relating to the joint area 10 between the pipe adapter 5 and the ring adapter 6.

This further design relates in particular to the design of the flange 31 of the connecting tube 9, the receiving chamber 32 and the location of the sealing ring 11. According to this embodiment, the abutment surfaces 36, 37 on the flange ring 31 and the receiving chamber 32 in the form 30 of 27, which cone is positioned offset relative to the flange 31 towards the direction of the pull force, - see arrow 54.

This results in the presence of the pull-out force - see arrow 54 - a force component acting radially in the radial direction - see arrow 56 - at the flange ring 31, thereby effectively preventing penetration into the connecting tube 9 towards the longitudinal center axis 27. Preferably, the tip angle of the cone is approx. 150 ° to 170 °.

5 As can be seen from FIG. 6, the flange ring 31 is provided at its perimeter with a support groove 58 formed through a circular recess for positioning the O-ring 12. The ring adapter 6 has a sealing surface 59 facing the O-ring 12, whose circular cross section is approx. corresponds to the O-ring 12. However, the dimensions must be transferred to a press fit to the O-ring 12, so that a high sealing effect is obtained for the O-ring 12.

10 In FIG. 7, a further embodiment of the pipe fitting 1 is shown with the joint area 10 between the pipe adapter 5 and the ring adapter 6, which sealingly connects the connecting pipe 9 to the pipe adapter 5 by the sealing ring 11. The jointing of the pipe adapter 5 and the ring adapter 6 takes place, as already described in the previous figures, 15. preferably through friction welding of the tube adapter 5, the spring 18 of the tube adapter 5 is flanged to ring! Note 19 of the adapter 6 The connecting tube 9 is held in the ring adapter 6 by means of the flanging ring 31 in the receiving chamber 32, and - as already described in the previous figure - it is secured in radial direction against penetration through the pipe wall against the longitudinal axis 27 by means of of the cone stub-shaped 20 extending abutment faces 36, 37 adjacent to the tip angle 57, facing one another. In the receiving chamber 32, a sealing ring 11 is clamped against opposite annular end faces 60, 61 of the flange 31 and the tube adapter 5, the end surface 61 of the tube adapter 5 being provided. a tension 62 projecting into it towards the end surface 60 of the flange 31, which causes a bias on the sealing ring 11 for secure sealing of the joint site 10. FIG. 8, another embodiment of the flange 31 of the pipe fitting 1 is shown flanging 31 to obtain a supporting effect against penetration through the pipe wall towards the longitudinal center axis 27, whereby the joint site 10 between the pipe adapter 5 and the ring adapter 30, the receiving chamber 32 and the arrangement of the sealing ring 11 corresponds to the configuration according to the configuration. previous figure described.

9 DK 177086 B1

In order to obtain a supporting effect for the pipe wall of the connecting pipe 9, in this embodiment the flange ring 31 is provided with an end surface 64 located on an opposite sealing ring 11, circumferential groove 65. The ring adapter 6 cooperates with the cutter groove 65 and after joining the pipe adapter 5 with the ring adapter. 5 the adapter 6 into the supporting ring 66 in the undercut groove 65. Intrusion into the pipe wets of the connecting pipe 9 - see arrow 67 - is thus effectively prevented even by greater tensile loads acting between the pipe adapter 5 and the connecting pipe 9.

It should also be mentioned that plastic is suitable as a material for the elements of the pipe fitting 1 and that polyethylene is preferably used for the connecting pipe 9. Such materials are particularly workable, have a high strength, can be used in a wide temperature range and are susceptible to various active substances.

Finally, for the sake of good order, it should be noted that the pipe fitting; 15 1 and its constituents are partly reproduced in incorrect scale and / or magnified in right and / or diminished to give a better understanding of the construction of the pipe fitting 1.

The purpose of the independent solutions according to the invention is apparent from the description. In particular, the individuals of FIG. 1; 2; 3; 4; 5; 6; 7, 8 embodiments are the subject of independent solutions according to the invention. The relevant tasks and solutions according to the invention appear from the detailed descriptions of these figures.

List of reference names 25 I Pipe luminaire 2 Pipeline 3 Plastic pipe 4 Luminaire 5 Pipe adapter 30 6 Ring adapter 7 Through bore 8 Through bore 9 Connecting pipe DK 177086 B1 10 10 Joining area 11 Sealing ring 12 O-ring 13 End area, 5 14 Outer thread 15 End area 16 Flange 17 Springs 10 19 Flange 20 End face 21 Note 22 Inner diameter 23 Outside diameter 15 24 Insertion depth 25 End area 26 Pointing end 27 Length mid axis 28 Impact 20 29 Overhang 30 Wall thickness 31 Flange 32 Recording chamber 33 Inner diameter 25 34 Outer diameter 35 Height 40 Touch surface 38 41 Flange 42 Housing 11 DK 177086 B1 43 Sliding valve 44 Housing part 45 Tapping bracket 46 Supply line 5 47 Internal thread 48 Impact ring 49 Welding sleeve 50 Attack point 51 Heat coil I 10 52 Welding layer! 53 Support sleeve ^ 54 Arrow 55 Intersection 56 Arrow 15 57 tip angle 58 Support pin 59 Sealing surface 60 End surface 61 End surface 20 62 Clamping 63 Support device 64 End surface 65 Undercut groove 66 Support ring in

Claims (13)

A pipe fitting (1) for an insoluble connection between a pipe (2) and a fitting (4), eg pipe sleeve, valve housing or sliding valve, fittings, etc., with a pipe adapter (5) and a ring adapter (6) which can be connected with the pipe adapter (5) and with a bore (7, 8) passing through the holes (7, 8) of the pipe adapter (5) and 5 of the connecting adapter (9) which protrudes from the ring adapter (6) with a tip end (26) and which in the joint region (10) between the tube adapter (5) and the ring adapter (6) is formed as flange, and where opposite end faces (20) form an annular circumferential groove device, the connecting tube (9) in the joint region (10) between The tube adapter (5) and the ring adapter (6) are provided with a flanging ring (31) extending beyond the outer tube (9), and in which a ring-shaped receiving chamber (32) is arranged in the tube adapter (5) and / or in the ring adapter (6). ) which receives the flange ring I (31) and a sealing ring (11), characterized in that t the sealing ring (11) enclosing the flange ring (31) around the perimeter. 15 Pipe luminaire (1) according to claim 1, characterized in that an annular face (37) facing the flange ring (9) of the connecting tube (37) of the receiving chamber (32) together with an annular face (36) of the flange (31) facing it ) forms a pull-out stop for the connecting pipe (9) and the abutment faces (36, 37) extend 20. a plane (38) extending perpendicular to a longitudinal center axis (27). Pipe luminaire (1) according to claim 2, characterized in that the abutment surfaces (36, 37) are formed as conical surfaces of a cone stub with a tip angle (57) of between 150 ° and 175 °. 25 Pipe luminaire (1) according to claim 1, characterized in that the flange ring (31) is provided on its outer circumference and annularly surrounding it with a support groove (58) for the sealing ring (11). 30 A pipe fitting (1) according to claim 1, characterized in that the connecting pipe (9) projects into the bore (7) of the pipe adapter (5). DK 177086 B1 13 Pipe luminaire (1) according to claim 5, characterized in that the insertion tube of the connecting tube (9) | depth (24) into the pipe adapter (5) towards an abutment means (28) projecting over the longitudinal center axis (27) is limited by the inner diameter (22) of the pipe adapter (5) through the bore (7). 1 5 Pipe luminaire (1) according to claim 6, characterized in that the stop means (28) is formed by a stop ring (48). Pipe luminaire (1) according to claim 1, characterized in that abutment surfaces for a tool are arranged at the outer circumference of the pipe adapter (5). Pipe luminaire (1) according to claim 1, characterized in that a support sleeve (53) is arranged in a friction-locked manner in the connecting pipe (9). ! i 15 Pipe luminaire (1) according to claim 1, characterized in that the pipe adapter (5) is provided on an end surface (61) which extends inwardly with the annular chamber (32) towards the receiving chamber (32) of the ring adapter (6) (62). . Pipe luminaire (I) according to claim 1, characterized in that between the flange ring (31) of the connecting pipe 20 (9) and the ring adapter (6) there is provided a supporting device (63) for a pipe wall in the connecting pipe (9). in Pipe luminaire (1) according to claim 11, characterized in that the support device (63) is formed by an undercut groove (65) in an opposite surface (64) located on the flange (31) of an opposite chamber (32) and of a support ring (66) cooperating with a cutting groove (65) on the ring adapter (6). 12 DK 177086 B1 Pipe luminaire (1) according to claim 1, characterized in that the pipe adapter is designed in combination with a luminaire (4), for example a sliding valve, bore hanger etc.