DE8713548U1 - Pipe connectors - Google Patents

Description

The invention relates to a pipe connector for connecting a connecting pipe to a drain pipe, according to the preamble of claim 1.

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In sanitary installations, vertical drain pipes are laid in the building to which connecting pipes coming from bathroom or kitchen facilities are connected. The connecting pipes are often made of a different material than the drain pipes and they have a smaller pipe width than the drain pipe. Known pipe connectors for connecting a connecting pipe to a drain pipe have a rubber sleeve that is attached to a branch of the drain pipe with a clamping ring. The end of the rubber sleeve facing away from the drain pipe is closed off by an end wall.

Telephone: (0221)131041 Telex: 888 23O7dUpa d Telecopier·: (0221) 1342»/ Telegram: Dompatent Köln

Accounts:

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which has numerous cutting grooves with different diameters. Depending on the width of the connecting pipe to be connected, the front wall can be split open at a cutting groove in order to insert the connecting pipe into the sleeve. Inside the sleeve there is a sealing lip that protrudes diagonally inwards and seals the connecting pipe. These known pipe connectors have the disadvantage that their pressure resistance is insufficient; for a connecting pipe of small width, the contact pressure of the sealing lip on the connecting pipe is relatively low. Furthermore, the internal pressure or mechanical influence can cause the pipes to shift longitudinally, which in turn can lead to leaks. Even if the pipes to be connected are not exactly aligned with one another, but are bent to each other, there is a risk of leaks.

The invention is based on the object of creating a pipe connector of the type specified in the preamble of claim 1, which has increased compressive strength and longitudinal force-locking properties and allows bending of the pipes without impairing the sealing effect.
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This object is achieved according to the invention with the features specified in the characterizing part of claim 1.

In the pipe connector according to the invention, the first neck part is attached to the end of the drain pipe in the usual way with a clamping ring. The second neck parts, which connect to the outside, have graduated diameters, i.e. every second neck part is designed for a connection.

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pipe with a different outside diameter. If a specific connecting pipe is to be connected, those second neck parts whose diameter is too small for the connecting pipe are cut off from the sleeve along the relevant cutting line and the connecting pipe is pushed into the second neck part into which it fits. The connection is then secured using the second clamping ring, which is tightened and fixed around the second neck part. In this way, the sleeve is sealed to both the connecting pipe and the drain pipe with a clamping ring. The pipe connection is pressure-resistant and has a high longitudinal force fit, i.e. no leaks can occur if the pipes are pulled apart. Misalignment or bending of the pipes relative to one another is also possible without affecting the tightness. The graduated second neck sections allow the sleeve to be used for different pipe widths without the sleeve having to be stretched excessively.

Preferably, the second neck part with the smallest diameter is closed at its outer end with a one-piece front wall. The sleeve forms a hood that is only open at the first neck part. This hood can be put on the end of the drain pipe as a construction plug to prevent foreign objects from falling into the drain pipe during construction. If the connecting pipe is then to be connected to the drain pipe, the sleeve is removed from the drain pipe, cut along the respective cutting line to match the outer diameter of the connecting pipe and then the sleeve is mounted on the drain pipe.

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pipe and connecting pipe by placing and tightening the clamping rings. It is also possible to place the first clamping ring when using the sleeve that has not yet been cut to size as a construction plug and thus fix the sleeve to the drain pipe. The removal of the sleeve parts that are not required and the insertion and fastening of the connecting pipe can be done with the sleeve mounted on the drain pipe.

The sleeve is made of a flexible material, such as rubber or similar, so that it is possible to tightly enclose both pipes and the pipes can still move relative to each other within certain limits even after the sleeve has been installed. Even bends between the pipes do not affect the tightness of the pipe connection.

The pipe connector according to the invention is particularly suitable for connecting supply pipes from kitchens, bathrooms, etc. to cast iron drain pipes. The inner diameters of adjacent second neck parts preferably differ by about 10 to 12 mm. This means that, for example, with three neck parts with different diameters, a diameter range of the connecting pipes of 30 to 35 mm can be covered, i.e. connecting pipes can be connected whose diameters differ within the range mentioned. A single clamping ring is sufficient for all second neck parts if this clamping ring allows such adjustments of its width that it covers the entire diameter range in question.

In the following, an embodiment of the invention is explained in more detail with reference to the single figure of the drawing.

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The pipe connector is shown in longitudinal section in tfcf? Zei^hmiiio.

The pipe connector has a sleeve 10 made of rubber or a similar flexible material. One end of the sleeve 10 is pushed over the cast iron drain pipe 11, while a connecting pipe 12 can be pushed into the other end of the sleeve. The dashed and dash-dotted connecting pipes 12a and 12b are examples of other sizes of connecting pipes that can also be used in conjunction with the sleeve 10. The connecting pipe 12, through which waste water is fed to the drain pipe 11, has a diameter that is smaller than that of the drain pipe 11.

At the end of the largest diameter of the sleeve 10 there is the first neck part 13, which is essentially cylindrical and is pushed onto the drain pipe 11. On the inside of the neck part 13 there are two circumferential sealing strips 14 and above these on the outside there is the annular groove 15 for receiving a clamping ring 16 or tensioning band for tightening the sleeve on the drain pipe.

The first neck part 13 is adjoined by a truncated cone-shaped transition area 17 to the largest second neck part 18a, which is also essentially cylindrical. This is followed by the middle second neck part 18b and then the smallest second neck part 18c. Each of the second neck parts 18a, 18b, 18c is essentially cylindrical and has sealing strips 14 running around the inside and sealing strips 14 on the outside.

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side has an annular groove 15 for the clamping ring 16. The diameter gradations of the second neck parts are such that the inner diameter of the largest second neck part 18a is 70 mm, that of the middle second neck part 18b is 58 mm and that of the smallest second neck part 18c is 48 mm. Two adjacent second neck parts of different diameters are connected to one another by an annular end wall 19, which also forms a cutting line 20 for separating part of the sleeve. At the end of the smallest neck part 18c, the sleeve 10 is closed by an end wall 21, which is formed as one piece for the sleeve. There is also a cutting line 20 at the transition between the end wall 21 and the neck part 18c.

All cutting lines 20 represent weakening lines in which the material of the sleeve is less thick than in the other areas and all cutting lines 20 are arranged on the front side. Each of the cutting lines 20 can be separated from the outside using a knife.

If the sleeve 10 is to be attached to the pipe 12 of relatively small diameter, only the end wall 21 is removed from the sleeve and the pipe 12 is inserted into the neck part 15 and tightened with a clamping ring 16. If, on the other hand, a connecting pipe 12a of larger width is used, the sleeve is cut open at the cutting line 20 between the neck parts 18b and 18c and the connecting pipe 12 is inserted into the neck part 18b. If a larger pipe 12b is used, the sleeve is cut open at the cutting line 20 between the neck parts 18a and 18b and the pipe 12b is inserted into the neck part 18a.

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Before the sleeve is adapted to the respective connecting pipe, the sleeve 10 can be used as a construction plug for the drain pipe 11 by pushing it in its original state over the end of the drain pipe 11 and completely covering it. This prevents building material or dirt from penetrating the drain pipe.

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Claims (2)

EXPECTATIONS 1. Pipe connector for connecting a connecting pipe (12) to a drain pipe (11), with a flexible sleeve (10) which has a first neck part (13) for sliding onto the drain pipe (11) and, adjoining the first neck part (13), a plurality of second neck parts (18a, 18b, 18c) with graduated reduced diameters, each of the second neck parts (18a _, 18b _, 18c) having an annular cutting line (20) at its end facing away from the first neck part (13),
characterized in that the first neck part (13) and each second neck part has an annular groove (15) on the outside for a clamping ring (16) and that the second neck part (18c) with the smallest diameter is closed at its outer end with an integrally formed end wall (21) which can be severed along an annular cutting line (20). 2. Pipe connector according to claim 1, characterized in that each neck part (13, 18a, 18b, 18c) has circumferential sealing strips (14) on its inside.