DE202018106733U1 - Pipe transition piece with overhang, and thus produced pipe connection - Google Patents

Abstract

Pipe connection piece (1) for connecting two pipes with approximately the same nominal diameter,
• with an inner tube (2),
◯ which determines the inside diameter of the pipe fitting (1),
◯ has a first front end (6),
◯ and a second front end (7)
• and with an outer tube (3),
◯ which is arranged outside the inner tube (2),
◯ extends over part of the axial length of the inner tube (2),
◯ and at a distance to the inner tube (2),
◯ has an outer end (8) which is close to the plane of the first front end (6) of the inner tube (2),
◯ and a middle end (9), which is further away from the plane of this first end face (6),
• and with a closing ring (4),
◯ extending from the middle end (9) of the outer tube (3) to the inner tube (2), characterized
in that the inner tube (2) extends beyond the outer end (8) of the outer tube (3),
such that the middle end (9) and the outer end (8) of the outer tube (3) lie between the two front ends (6, 7) of the inner tube (2).

Description

The innovation relates to a pipe transition piece according to the preamble of claim 1.

From the DE 20 2010 008 131 U1 such as DE 20 2011 000 987 U1 are generic pipe transition pieces known. They have proven themselves in practice outstanding, to connect pipes with significantly different wall thicknesses and approximately the same inner diameter with each other.

The innovation is based on the object to improve a generic pipe transition piece to the effect that it is suitable for connection to pipelines with end edges of different geometry, and to provide a pipe connection in which not only the wall thickness of the tubes, but also their front edge geometry may be different, and reliably connected tightly together.

This object is achieved by a pipe transition piece according to claim 1 and by a pipe connection according to claim 12. Advantageous embodiments of the innovation are described in the subclaims.

Over a portion of the length of the inner tube extends the outer tube, which ends between the two ends of the inner tube and is held there by a closing ring concentric with the inner tube. This end ring extends from the inner tube to the outer tube. The innovation proposes to let the inner tube not only in a conventional manner protrude from the middle end of the outer tube, but also to let protrude from the opposite outer end of the outer tube, so to form a supernatant with which the inner tube from the outer end of the outer tube protrudes. This results in surprisingly diverse possibilities to connect the same pipe transition piece either to the one or the other end of a seaming tube, or to a smooth cut end of a tube, as occurs in practice, for example, if a seaming tube has been shortened for length adjustment. Provisional pipe fittings can be tightly connected to these three different geometries using pipe collars, even if there are gaps between the outer pipe and the adjacent pipe.

In a manner known per se, the pipe connection piece can be double-walled over part of its length, so that it does not have to be produced as a special shaped piece, but rather can be made, for example, from pipe elements of a commercially available delivery program. The resulting gap between inner and outer tube can be advantageously filled with a support material to increase the stability of the pipe fitting. The mentioned pipe sleeve can be tightened accordingly to ensure a reliable tight fit on the outer tube. In addition, the position of the outer tube is fixed to the inner tube by the support material and relative movements of these two tubes to each other avoided. Preferably, a low-cost and lightweight support material can be used. In the intermediate space, for example, a flowable filler can be filled, or it can be inserted parallel to the axis a plurality of spacer pins in the space, or it can be a spacer inserted into the gap, which circulates circumferentially around the inner tube.

The mentioned support material may be configured in the form of a plurality of axially parallel support ribs which are arranged distributed circumferentially around the inner tube, and these support ribs may advantageously be integrally formed on the outer tube so that they do not have to be handled as separate elements. In particular, the support ribs may be dimensioned so that they extend from the inner tube to the outer tube and the inner tube is thus supported without play in the outer tube or the outer tube is supported without play on the inner tube.

Alternatively to the use of the supports can be provided to use support material in the form of a potting compound, which fills the space between the inner tube and the outer tube. For example, the potting compound may be configured as a hardening material, e.g. as a resin, or as a foam, which is poured into the gap, where appropriate, expanded, and in any case hardens or sets after filling in the space.

Advantageously, the pipe connection piece made of plastic, so that can be used for the connection of a mineral pipe to a plastic pipe system components from the product range of plastic piping and a problem-free, dense and system equal connection of the plastic pipe to the proposed pipe connection piece is possible. The bonding of the end ring with the inner tube allows a fluid-tight connection of these two components together. In the context of the present proposal, such a bond can also be designed in the sense of ultrasonic welding or cold welding.

The second front end of the inner tube may advantageously be designed as a socket end or as a spigot end of a pipe section, so that Other pipelines can be easily connected without any additional adapter directly to the pipe connection system. In particular, the inner tube of the proposed pipe connection piece can be formed from a section of a plastic pipe, wherein the same type of plastic pipes forms the plastic pipe to be connected to the pipe connection piece.

Advantageously, the outer tube and the end ring can be formed by a common component. This is advantageous in favor of the stability and also the tightness of the pipe connection piece. In addition, a particularly inexpensive production of the pipe end piece can be supported by a commercial so-called pipe cap is used. Their lid is provided with a central bore which receives the inner tube. This pierced end cap thus forms as a single component, the outer tube and the end ring of the proposed pipe fitting, so that in a particularly economical manner, the pipe fitting, which is a special component can be created using standard commercial components, namely a piece of pipe and the aforementioned pipe cap. By choosing the corresponding outer diameter of the pipe cap, an approximate alignment of this pipe fitting to the outer diameter of a mineral pipe, for example, done so that only a relatively small difference in diameter is to bridge, which can be done by the already mentioned commercial pipe sleeves.

The outer tube can be created instead of the above-mentioned pipe cap by a per se known, commercial reducer, so that is used in this case, a mass-produced component with the corresponding economic advantages for the production of the pipe fitting. The outer reducer is called due to its shape as the outer bell of the pipe fitting and has at least two different diameters, the differences in diameter typically run in stages. If a particularly large difference between the outer diameters of the two pipes has to be bridged, two or more reducers can connect to each other and together form the outer pipe of the pipe fitting.

• 1 den Anschluss eines Rohranschlussstücks an ein erstes Ende eines Falzrohrs,
• 2 den Anschluss des selben Rohranschlussstücks an ein zweites Ende des selben Falzrohrs, und
• 3 den Anschluss des selben Rohranschlussstücks an eine glatte, abgeschnittene Stirnkante des selben Falzrohrs.

An embodiment of a pipe fitting is explained in more detail below with reference to the purely schematic representations. It shows

• 1 the connection of a pipe connection piece to a first end of a seaming tube,
• 2 the connection of the same pipe fitting to a second end of the same seaming pipe, and
• 3 the connection of the same pipe connection piece to a smooth, cut-off front edge of the same seaming pipe.

In 1 is a pipe fitting 1 made of plastic, which is an inner tube 2 having. An outer tube 3 runs concentrically around part of the length of the inner tube 2 and is over a closing ring 4 on the inner tube 2 established. The outer tube 3 and the end ring 4 can be formed by a common component in the form of a tube cap, so that for this reason no connecting materials or connecting elements are shown, which serve to connect these two components. The end ring 4 is with the inner tube 2 over an adhesive seam 5 glued, wherein for gluing an adhesive may be used, but the bonding can also be performed in the form of a thermal or ultrasonic welding.

The inner tube 2 has a first front end 6 on and a second front end 7 , For connection to a system-like plastic pipe is the second front end 7 designed as a spigot, as it also has the same system plastic tube, so that this plastic tube with its socket end directly to the second front end 7 of the inner tube 2 can be connected.

The outer tube 3 has an outer end 8th on, which is the first front end 6 of the inner tube 2 is closer than a middle end 9 of the outer tube 3 , The outer tube 3 closes with the middle end 9 to the end ring 4 at. The inner tube 2 sticking out with his first front end 6 from the outer tube 3 out and thus forms a supernatant 10 ,

The pipe connection piece 1 serves to connect the aforementioned plastic pipe to a folding tube 11 , which consists of a mineral material. In 1 is the connection of the pipe connection piece 1 to a first end of this seaming tube 11 represented, on which the folding tube 11 having an inner fold, so that this end of the seaming tube 11 also as a socket end 12 of the folding tube 11 can be designated. With his supernatant 10 extends the inner tube 2 in the fold of the folding tube 11 and lies with his first front end 6 the folding tube 11 at. This show the inner tube 2 and the folding tube 11 same inner diameter and are aligned same axis, so that the inner tube 2 at the same time to the folding tube 11 followed.

In the illustrated embodiment, the pipe fitting 1 to the illustrated type of seaming tube 11 exactly adjusted. The length of the supernatant 10 is therefore sized so that not only the first front end 6 of the inner tube 2 but also the outer end 8th of the outer tube 3 to the folding tube 11 followed. For the preparation of the pipe connection, the arrangement shown by pipe connection piece 1 and folding tube 11 tightly connected by means of a pipe sleeve. Suitable pipe collars are commercially available and are sold, for example, under the name "VPC pipe coupling" or "FHS pipe coupling" by the applicant.

2 shows the pipe fitting 1 from 1 , but partially broken away, as well as the same folding tube 11 as in 1 , although the pipe fitting 1 adjoins the opposite second end, which has an outer fold and as a spigot end 14 of the folding tube 11 can be designated. Also in this case lies the inner tube 2 with his first front end 6 the folding tube 11 and at the same time connects to it. Between the outer end 8th of the outer tube 3 and the folding tube 11 However, a gap remains, on the one hand by the length of the supernatant 10 and on the other hand determined by the outer fold. By using the pipe sleeve, however, this gap can be easily bridged and a tight connection of the pipe fitting 1 to the folding tube 11 , even at the top end 14 , be guaranteed.

3 shows the same pipe fitting 1 and also the same folding tube 11 , In contrast to the pictures of the 1 and 2 is the folding tube 11 however modified: as is often the case in practice, is the folding tube 11 shortened to length adjustment and now has an originally non-existent end without fold, which accordingly as a smooth finish 15 of the folding tube 11 can be designated. Also in this case lies the inner tube 2 with his first front end 6 the folding tube 11 and at the same time connects to it. Between the outer end 8th of the outer tube 3 and the folding tube 11 remains a gap, in this case only by the length of the supernatant 10 is determined and can be tightly bridged by the use of the pipe sleeve.

Notwithstanding the illustrated embodiment, in the intermediate space extending between the inner tube 2 and the outer tube 3 yields support material in the form of a filling this space filling mass or in the form of individual ribs or other spacers.

LIST OF REFERENCE NUMBERS

1

Pipe Connector

2

inner tube

3

outer tube

4

end ring

5

adhesive seam

6

First forehead

7

Second front end

8th

outer end

9

means end

10

Got over

11

Falzrohr

12

socket end

14

spigot

15

smooth end

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

• DE 202010008131 U1 [0002]
• DE 202011000987 U1 [0002]

Claims (13)

Pipe connection piece (1) for connecting two pipes with approximately the same nominal diameter, • with an inner tube (2), bestimmt which determines the inner diameter of the pipe connection piece (1), ◯ has a first front end (6), ◯ and a second front end (7) • and with an outer tube (3), which is arranged outside the inner tube (2), erstreckt extends over part of the axial length of the inner tube (2), ◯ and extends at a distance from the inner tube (2), ◯ an outer end (8), which is close to the plane of the first end face (6) of the inner tube (2), ◯ and a middle end (9) which is farther from the plane of this first end face (6), • and with a closing ring (4) extending from the middle end (9) of the outer tube (3) to the inner tube (2), characterized in that the inner tube (2) extends beyond the outer end (8) of the outer tube (3) in that the middle end (9) and the outside end (8) of the outer tube (3) between the two front ends (6, 7) of the inner tube (2) lie. Pipe connection piece Claim 1 , characterized in that a support material is arranged in the intermediate space between the inner tube (2) and the outer tube (3). Pipe connection piece Claim 2 , characterized in that the support material is designed as a plurality of circumferentially distributed around the inner tube (2), axially extending support ribs. Pipe connection piece Claim 3 , characterized in that a support rib of the inner tube (2) extends to the outer tube (3) and the inner tube (2) is supported without play in the outer tube (3). Pipe connection piece Claim 7 or 8th , characterized in that a support rib to the outer tube (3) is integrally formed. Pipe connection piece Claim 2 , characterized in that the support material is designed as a potting compound, which fills the space between the inner tube (2) and the outer tube (3). Pipe connecting piece according to one of the preceding claims, characterized in that it consists of plastic and the end ring (4) with the inner tube (2) is glued. Pipe connecting piece according to one of the preceding claims, characterized in that the second front end (7) of the inner tube (2) is designed as a socket end or as a spigot end of a pipe section. Pipe connecting piece according to one of the preceding claims, characterized in that the outer pipe (3) and the end ring (4) are designed as a common component. Pipe connection piece Claim 9 , characterized in that the outer tube (3) and the end ring (4) form sections of a so-called outer bell, which adjoins the inner tube (2) in the region of the end ring (4) and forms a sleeve which is adjacent to the inner tube (2) coaxial with this runs. Pipe connection piece Claim 10 , characterized in that the outer bell has a multi-level outer contour and is formed from at least one step forming a reducer. Pipe connection of two pipes with approximately the same nominal diameter, using a pipe fitting (1), which is designed according to one of the preceding claims, and two different outside diameters at the two ends of the pipe fitting (1), wherein a first, configured as folding tube (11) pipeline with a first wall thickness of the first front end (6) of the inner tube (2), the inner diameter of this seaming tube (11) being substantially equal to the inner diameter of the pipe connecting piece (1), and wherein a pipe sleeve engages over the larger outer diameter of the pipe connection piece (1) and an adjacent portion of the seaming tube (11), and wherein the second front end (7) of the inner pipe (2) is followed by a second pipe having a second wall thickness which is smaller than the first wall thickness of the folding tube (11). Pipe connection to Claim 12 , characterized in that between the outer end (8) of the outer tube (3) and the folding tube (11) remains a free distance, which is bridged sealingly by the pipe sleeve.

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