DE2517951A1 - CONNECTOR FOR CONNECTING A PLASTIC PIPE OR HOSE WITH A METAL FITTING, E.G. A GAS KNIFE - Google Patents

Description

PATENTANWÄLTE D 59 Siegen

DiPL-ING. ERICH SCHUBERT Marburger Tor 2 - PO Box

DIPL.-ING. ROLF PÜRCKHAUER ^{Telephone: (0271) 54070}

Telegram address: Patschub, Siegen

2 LAPR. 1975

BRITISH GAS CORPORATION, 59 Bryanston Street, London WIA 2AZ, England

This application claims priority from British patent application no. 17679/7 ¹ I claimed the April 23, 1974.

Connector for connecting a plastic pipe or hose with a metallic itting, e.g. a gas meter

The invention relates to a connector for connecting a plastic pipe or hose to a Metal fitting.

Polyethylene pipes or hoses for utility networks, particularly for household gas, are increasingly used. However, there were problems in that it was difficult to get the plastic pipe through to the gas knife connectors to combine satisfactory procedures. There are disadvantages to certain types of connectors, namely:

(a) A jig must be used to secure the plastic tube to the connector of the gas meter.

(b) Certain types of connectors give the plastic pipe the possibility of entering the knife housing and this could increase the risk of fire.

The invention is based on the object of creating a connecting piece which, while avoiding the described

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Disadvantages of a secure connection of plastic pipes or -hoses with a metal fitting.

The invention is based on a connector for connecting a plastic gas pipe to a metal gas meter fitting, which is housed in a knife housing, with a hollow body with two ends, the first end being medium-tight is connected to the connector, while the second end has a threaded portion, the connector thereby is characterized in that at a preferred point between the two ends of the body a parallel thread section is arranged in the vicinity of a flange which has a larger diameter than the parallel thread section, wherein the Flange flats on its edges for attaching a corresponding one Has tool.

The invention will now be described with reference to the drawing which shows it by way of example and shows the only one Figure 1 shows a side view of a connector according to the invention with a sectional view of a preferred known plastic pipe coupling.

The connecting piece has a hollow body 1 with a conical thread 2 and a parallel thread 3. The thread 3 serves to locate a lock nut ¹ I with a fiber disc 5, above a flange 6, which has at its edges Abflachungeri. At the end remote from the conical thread there is a clamping device or coupling 7 which holds a plastic pipe 8 on the body 1 in a fluid-tight manner.

When making the connection, the connecting piece is pushed through a hole in a knife housing 9 and attached to the housing by the lock nut * i, and between the housing and the lock nut is the fiber washer 5. The connecting piece is held in place while the jam nut is tightened using a wrench on the flats of the flange 6. The

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Splashing avoids the use of a heavy gripping tool around the body 1, which can lead to breakage of the connector. The plastic pipe 8 is inserted into the hollow body 1 and held in a fluid-tight manner by using the clamping coupling 7. The hollow body 1 is held stationary on the surface 6 by using a wrench, while the clamping coupling 7 is tightened against the plastic pipe 8 in order to connect it to the body 1 in a fluid-tight manner.

The advantages of the connector according to the invention are that it is designed so that it can be held, while the body is clamped to the knife housing and while the plastic tube is made by using the coupling with the connector is coupled. A preferred coupling, as shown in FIG. 1, is described in GB-PS 1,126,267. Another advantage of the connector is the fact that a jig for holding the plastic pipe in place and the connecting piece is now made superfluous during the mutual fastening "

In addition, the connector has the advantage that any length of plastic tube is now removed from the knife housing and thus eliminating any fire hazard.

The preferred type of coupling for gripping the polyethylene pipe is shown in the drawing in two different operating positions, the left part A of the drawing showing the coupling in the relaxed, ie not tightened state, while the right part B illustrates the coupling in the tensioned or clamped state . The coupling works in such a way that it presses the polyethylene pipe 8 over a toothed component 10 and between a clamping wedge 11 and a deformable component 12 by screwing or screwing a union nut 13 onto the body of the connector I ¹ I. The deformable component 12 is pressed against the clamping component 11, which in turn presses the polyethylene tube into the teeth, whereby the polyethylene tube is held firmly in its position. The clamping component 11 is pressed against the outer surface of the tube 8, and in this way forms a seal.

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Claims (1)

75 023 Kfl / A 21. APR. 1975 Claim Connector for connecting a plastic gas pipe with a metal gas knife fitting, which is in a knife housing sits, consisting of a hollow body with two ends, the first end of which is a coupling piece for holding the plastic pipe in a fluid-tight manner at the connector and the second end has a threaded portion, thereby characterized in that at a preferred point between the two ends of the body (l) a parallel thread section (3) in the vicinity of a flange (6) is provided which has a larger diameter than the parallel thread section (3), and that the puddle (6) has flattened areas on its edge for attaching a tool. 509846/0755