EA020723B1 - Method for combining connection components with polypropylene pipe pp-r - Google Patents

Abstract

The invention relates to the method of combination of the connection components with the intermediate aluminium foil layer (2) polypropylene pipe (5) (PP-R) comprising the operations steps of cutting the pipe (5) vertical to its axis; placeing the screw plate (12) and the connection piece screw plate into the welding machine and heating up to 260°C; marking the welding length and after heating the welding machine up to 260°C pushing the polypropylene pipe (5) (PP-R) up to the marked welding point, comprising the intermediate aluminium foil layer (2), into the screw plate (12) at the same time and force with pushing the connection piece towards the connection piece screw plate up to the marked point; and it is characterized in that it comprises the operation steps of melting the surface of the PP-R outer layer (3) by its contacting with the outer layer melting surface (9), which guides the said outer layer (3), when pushing the PP-R pipe (5) into the heated screw plate (12); melting the PP-R inner layer (1) by its contacting with the inner layer melting surface (10), which guides the said inner layer (1), when pushing the PP-R pipe (5) into the heated screw plate (12), when the pipe (5) reaches towards the end, flowing the melted parts at the outer layer (3) and the inner layer (1) towards the section surface of the pipe (5) with the help of the screw plate (12), comprising the guide cavity (7); covering the said foil layer (2) by combination of the PP-R outer and inner layers (1, 3) with each other.

Description

The invention relates to dies, which are used to connect pipes and connecting elements.

The invention, in particular, relates to a die that prevents any damage that may occur after the joining operation, which is used to join the PP-K (polypropylene) pipe (5) with an intermediate layer of aluminum foil and connecting elements.

Prior art

Currently, dies, as you know, are used in the thermal connection of pipes and fittings. Especially often in installation operations they use the connection of cranked, cross, choke, and other connecting elements with pipes, which will be used in installation operations. The connection of the propylene pipe and extension (connecting) parts is performed by placing a polypropylene pipe and an extension part at both ends of the die and by heating to 260 ° C in a welding machine. A die used in prior art connecting systems prepares a polypropylene pipe for connection by simply melting its top layer. Thus, in compounds made using tube dies, which were used in prior art technologies, water seeps over time between the outer layer and the PP-K foil layer (polypropylene) pipes with an intermediate layer of aluminum foil and dissolves the binder, and in the outer breaks and cracks occur in the pipe layer.

In pipe joining operations, which are performed using dies used in the prior art, leaks are observed over time at the junction points. Patents are known that have been developed as a result of improvements made to the prior art relating to dies. For example, European patent EP 0 485 651 B1 discloses a die for connecting PP-K (polypropylene) pipes containing an intermediate layer of aluminum foil with extension pieces and describes a cylindrical (gradual) decrease in the internal volume of said die. In all applications of the dies currently known, the outer layers of the polypropylene pipes to be connected are melted by a heating operation (260 ° C.).

Some of the patent documents present in the prior art have the following numbers: No. 0 2006/121418 ΑΙ, ΌΕ 202008001101 I1, ΌΕ 102008006068 B3, TP 7301374 A, TP 55055823 A, I8 4278424 A, I8 2004/007279.

The abstract of patent application No. 0 2006/121418 states the following: The invention is a multilayer composite pipe resistant to pressure and corrosion, which can be used in sanitary systems, containing at least one inner pipe (1) with low permeability to oxygen and at least at least one layer (3) of aluminum foil covering said inner tube (1) and having an expansion coefficient depending on a change in pressure or temperature that is lower than the expansion coefficient of said inner pipes (1), where, in order to protect the aluminum coating (3), as well as the inner pipe (1) inside the extension piece without removing said coating, at least one filling trough (3.1) is provided in the form of a channel, which makes it possible to clean the surface of said aluminum coating (3), visible in the end part of the composite pipe, and leave it inside the plastic and enclose inside it, and close the cleaned volume by filling with plastic material.

The abstract of patent application No. 102008006068 contains the following: The system comprises a heating device for heating the ends of the pipe and a conical radial recess (1c) of the fitting (1) and is equipped with ring heating elements. The fitting is designed in such a way that it connects the ends of the pipes to the inner and outer walls of the fitting by covering them after heating the radial recess and the composite pipe (2) with two layers (2a, 2c) of plastic and a layer (2b) of metal. The fitting comprises an inner shell (1b) made of a heat-resistant material or metal to stabilize the inner wall of the fitting, where the shell is inserted into the fitting.

After analyzing all the applications related to the prior art, it was found that the heating operation, which is carried out only through the outer layer, has disadvantages. However, the connection could not cause problems if there was the possibility of performing the heating operation through both the inner and the outer layers. The most significant reason for the appearance of the product of the invention is the solution to this problem.

In conclusion, the need for a previously non-existent die, which melts the inner layer and the outer layer of the pipe, covers the layer of aluminum foil and, thus, ensures their connection with each other, as well as the mismatch of the solutions of the prior art led to the need to improve the relevant field of technology .

- 1,020,723

SUMMARY OF THE INVENTION

The present invention relates to a die for connecting a PP-K (polypropylene) pipe containing an intermediate layer of aluminum foil with connecting elements, which meets the above requirements, eliminates all the disadvantages and provides some additional advantages.

Based on the known state of the art, the purpose of the invention is to provide a previously non-existent die that melts the inner layer and the outer layer of the pipe, covers the layer of aluminum foil and, thus, ensures their connection with each other.

In particular, the purpose of the invention is to allow the pipe to act as a single layer after joining the inner layer and the outer layer of the pipe, since they are made of the same material (polypropylene).

Another objective of the invention is to prevent damage caused by joints made using tube dies of the prior art.

To achieve the above objectives, the invention is a method of connecting the connecting components to a polypropylene pipe (PP-K) containing an intermediate layer of aluminum foil, which involves the steps of: cutting the pipe perpendicular to its axis, placing the dies and dies of the connecting part in the welding machine and waiting for the welding machine to heat up up to 260 ° C, marking the length of the weld after cutting the pipe perpendicular to its axis and after heating the welding machine to 260 ° C, insertion of a polypropylene pipe (PP-K) containing intermediate layer of foil, at the marked welding length in the die at the same time and with the same force as the connecting part, which is slowly pushed into the die of the connecting part to a certain mark, which is characterized in that it contains the working steps: melting the outer layer of PP -K by its contact with the rounded melting surface of the outer layer, which guides the specified outer layer, when the PP-K pipe is inserted into the heated die, melting of the inner layer of PP-K by its contact with the rounded melting surface in the morning layer, which guides the specified inner layer, when the PP-K pipe is inserted into the heated die, when the pipe approaches the end, the molten parts of the outer layer of PP-K and the inner layer of PP-K flow towards the pipe cross-section surface due to the die containing the guide cavity closing said foil layer by connecting the outer and inner layers of PP-K to each other.

To achieve the above advantages, which will become more clear from the following detailed description, the present invention due to its characteristics provides many advantages.

Structural and characteristic features of the invention and all advantages will be better understood from the detailed descriptions with the figures and the figures below, and therefore, when evaluating the invention, these figures and detailed explanations should be taken into account.

Description of graphic materials

For a better understanding of the embodiment of the present invention and its advantages, which add additional elements of the invention, it must be evaluated in combination with the figures described below.

In FIG. 1 is a sectional view of PP-K (polypropylene) pipe (5) containing an intermediate layer of aluminum foil.

In FIG. 2 is a sectional view of a die, which is the subject of the invention.

In FIG. 3 is a cross-sectional view of an embodiment of a die that is the subject of the invention.

In FIG. 4 is a cross-sectional view of a die of the prior art.

Reference Numbers:

- inner layer PP-K;

- a layer of aluminum foil;

- outer layer PP-K;

- a layer of a binder;

- PP-K pipe with an intermediate layer of aluminum foil;

- the inner cavity of the PP-K pipe;

- guide cavity;

- guide core;

- rounded melting surface of the outer layer;

- rounded melting surface of the inner layer;

- fracture surface;

- a die.

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DETAILED DESCRIPTION OF THE INVENTION

In this detailed description, preferred embodiments of the die (12), which is used to connect the connecting elements to a PP-K (polypropylene) pipe (5) containing an intermediate layer of aluminum foil, are disclosed only for a better understanding of the subject and do not imply any restrictions.

In FIG. 1 is a sectional view of PP-K (polypropylene) pipe (5) containing an intermediate layer of aluminum foil. The specified polypropylene pipe (5) contains the outer layer (3) PP-K, which determines the outer cross section and the nominal size of the pipe (5), the layer (2) of aluminum foil, which increases the compressive strength, reduces the linear elongation of the pipe (5) and allows you to weld the pipe (5) to the connecting elements without trimming the edge due to its placement in the intermediate part, and the inner layer (1) PP-K, which defines the internal section of the pipe (5), and the layer (4) of a binder located between the specified outer layer (3) PP-K and a layer (2) of aluminum foil and both ensures, bonding layer (2) of the foil to the outer layer (3) PP-C. The interior of said pipe (5) comprises a cavity (6) to allow passage of fluid to be moved according to the intended purpose of use.

According to the invention, the die (12) is designed to melt the inner layer (1) of PP-K and the outer layer (3) of PP-K pipe (5) and to connect two of these layers (1, 3) with each other so that they cover the layer (2) aluminum foil. The outer layer (3) of the PP-K pipe (5), placed in the die (12) using the guide cavity (7), is melted using the rounded surface (9) of melting the outer layer, which is in contact with the specified outer layer (3) PP-K, while the inner layer (1) of the PP-K pipe (5) is molten using the rounded surface (10) of melting the inner layer. Thus, since both the inner and outer layers (1, 3) are made of the same material (polypropylene), the pipe (5) will act as a single layer after connecting these layers.

Below are the working steps of the method for connecting the connecting parts of the propylene pipe (5) (PP-K) and the connecting parts. The die (12) according to the invention and the die of the connecting part are placed in the welding machine and wait until the welding machine heats up to 260 ° C. The PP-K welded (polypropylene) pipe (5) containing the intermediate foil layer is pushed to the marked length into the die (12) according to the invention at the same time and with the same force as the connecting piece, which is slowly inserted into the connecting piece die to a certain point. The pipe (5) is directed into the die (12) using the guide cavity (7). The guide core (8) is inserted into the pipe cavity. The fracture surfaces (11) are made between the upper and lower guide cavity (7) and the guide core (8) to ensure easy passage (direction) of the pipe (5) in the die (12). The surface of the outer layer (3) PP-K of the specified pipe (5), which is in contact with the tube die (12), melts under the influence of a rounded surface (9) of melting of the outer layer; while the surface of the inner layer (1) PP-K of the specified pipe (5), which is in contact with the tube die (12), melts under the influence of the rounded surface (10) of melting of the inner layer. When the pipe (5) reaches the end, the molten parts on the outer layer (3) of PP-K and the inner layer (1) of PP-K flow towards the cross-sectional surface of the pipe (5) due to the shape of the surface of a previously non-existent pipe die (12), cover the specified layer of foil (2) and, thus, provide a connection of the layers (1, 3) with each other and ensure that the pipe (5) acts as a single layer before connecting to the connecting part.

The scope of protection of this invention is indicated in the claims below and is not limited to the above descriptions, which are given only as examples. It is obvious that a specialist in this field can apply the innovation disclosed in this invention in other similar applications by partially changing the shape and use of such structures. Therefore, it is also obvious that such embodiments are not new and, in particular, do not go beyond the prior art.

- 3,020,723

Claims (1)

CLAIM The method of connecting the connecting part with a polypropylene pipe (5) (PP-K) containing an intermediate layer (2) of aluminum foil between the inner layer (1) and the outer layer (3), which consists in cutting the pipe (5) perpendicular to it axis place a die (12) intended for melting the inner layer (1) and the outer layer (3) of the PP-K pipe, and a die for melting the connecting part into the welding machine and wait for the welding machine to heat up to 260 ° C; mark the length of the welding on the polypropylene pipe and after heating the welding machine to 260 ° C, push the polypropylene pipe (5) (PP-K) containing the intermediate layer of foil onto the marked welding length in the die (12) at the same time and with the same by the force that the connecting part, which is slowly pushed into the die to melt the connecting part to the specified marking, characterized in that the outer layer (3) of PP-K is melted by contacting the rounded surface (9) of melting the outer layer at the end of the guide hole ( 7) dice (12) which guides the specified outer layer (3) of the pipe when the PP-K pipe (5) is inserted into the heated die (12); melting the inner layer (1) of PP-K by contacting it with a rounded surface (10) of melting the inner layer at the end of the guide hole (7) of the die (12), which guides the specified inner layer (1) of the pipe, when the PP-K pipe is inserted ( 5) into a heated die (12), while when the pipe (5) is brought closer to the end of the guide blade (7) of the die (12), the molten parts of the outer layer (3) of the PP-K pipe and the inner layer (1) of the PP-K the pipes flow towards the cross-sectional surface of the pipe (5), and then close the specified layer (2) of the foil by connecting the outer and inner friction layers (1, 3) PP-R with each other and connect the end of the PP-K pipes with molten connecting part.