DE2027251A1 - Method of joining pipes or tubular parts - Google Patents

Description

The joining of pipes and similar tubular parts, e.g. B. Aramturen etc., is generally made by gluing, Welding or screwing achieved with an intermediate piece. Such procedures are lengthy and demanding and require, especially in the case of a threaded connection, prior fine machining, which is cumbersome is required and possibly expensive connectors lioh maoht.

It is the aim of the invention to eliminate these disadvantages and to provide a connection which has the desired Degree of tightness and mechanical strength guaranteed, but the use of costly materials or sharing is avoided. In addition, the inven-

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proper task is to create a connection that does not conduct the electrical current and is interrupted, if the connected components are made of metal.

The method of joining pipes and similar tubular parts is characterized in that a coarse Deformation of the outer surfaces of the ends to be connected is carried out and a mechanically resistant, curing material is poured. Preferably, the coarse deformation of the surface is to be connected Ends reached by notches or incisions made by grinding, grinding or punching. These Notches or incisions are preferably oriented so that they form an angle and, for example, in longitudinal and Run transversely. Such a deformation can also be achieved by removing or removing the end of the parts a beaded edge or by a z. B. duroh flaring reach attached ring.

The hardening substance can be a naturally hardening material, such as araldite, or thermo or Thermosets or even, especially when used of metal parts, a metal with a low melting point, such as zamak or lead.

The molding is carried out by casting or injection into a ring forming a mold. This ring can be used temporarily and after hardening

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be taken or form a component of the connection. in the the latter pail has the inner surface preferably bumps, such as. B. ribs or the like. To a better To ensure solidification with the molding compound and the lost casting mold to the mechanical strength of the connection to contribute. According to a preferred embodiment, the lost mold is formed by a length of pipe formed, both ends of which are compressed. The seal against the liquid material of the junction between | the two pipe parts to be united can be done by means of an adhesive tape or a tape placed over both pipe ends or inside the clamp inserted in the pipe ends can be achieved.

About electrical insulation and cathode protection To ensure that the two pipe ends are kept at a distance from each other and a removable or lost one Part in between, after which a hardening, electrically insulating material is poured. When a Lost metal mold is used, there will be a space between its edges and the outer surfaces of the to ™ 'Leave the connecting parts, the duroh the insulating structural members is closed.

In the following the details are described with reference to the drawings.

Show it:

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Pig. 1 a sieve, partly in section, one connection of two parts according to the invention,

Pig. 2 is a view, partly in section, of another modified embodiment;

Pig. 3 is a view, partly in section, of a

according to the invention. Process produced Link,

Pig. 4 is a view, partly in section, of this

modified embodiment of an insulating connection and

Pig. 5 is a view, partly in section, of a

further embodiment of an insulating connection.

In Pig. 1 are the two ends ta and 1b of the pipes to be connected with z. B. by grinding longitudinally and transversely attached to their outer surface Notches 2a and 2b provided. Naob more accurate alignment of the At the ends of each other, a thin adhesive tape 3 and a Porm 4 is placed on the junction, which was previously over the pipes was pulled. The inner surface of the part that forms the porm and is manufactured in the foundry has duroh the Incisions 5 formed bumps. The part 4 also has a Gießlooh 6, through which the hardening

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Material or Araldit 7 is injected to make the mold to fill. The mass 7 ensures the tightness and the mechanical connection of the pipe ends and the mold. The connection is further improved by the incisions 2.

In the embodiment of the Pig. 2, a flange 8a and 8b is formed at the ends of the two tubes 1a and 1b. Zwisohen the two SiOH opposite edges, a sealing ring is inserted 9 which is surrounded together with the edges with a EinguSform, in the lead, Zamak or a hardening plastic is poured to form the joint A 10th

The embodiment of Fig. 5 has the task of to create a connection through which the electrical current is interrupted in order to protect the cathodic between to ensure the pipes 1a and 1b provided with the notches 2, in the same way as with the pipes the pig. 1. The ends of the tubes have a certain distance from each other, and the space between them is temporarily z. B. duroh a ring 11 made of molding sand | locked. The (SßÖform 12, the in the present case is a cast part whose frustoconical parts 13 terminate in flange 14. The flansohe are oversized to fit between their edge and the surface of the pipes 1a and 1b insulating rings 15 to slide. An opening not shown is now in the mold

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Plastic mass or araldite 16 injected to make the seal to build. The ring 11 is then dissolved and removed.

In the embodiment of FIG. 4, this also has a connection with electrical power interruption represents, the ends of the tubes ta and 1b are widened at 17, into the ends of an insulation ring made of plastic, ceramic, hard rubber, asbestos cement or the like 18 intervene. The mold 19 consists of a sleeve of larger size, both ends of which are narrowed by upsetting. This sleeve 19 is pushed over the seam, wherein it is isolated by the insulating rings 20 from the surface of the pipes. Thereupon is through the hole 22 a hardening plastic mass 21 poured into the interior of the casting mold.

In the one in Pig. 5, the unevenness formed on the pipe ends 1a and 1b is created by rings with serration 25, which are held immovably by the mandrel 24 at a short distance from the end *

A clamp 25 made of insulating material is pushed over the two pipe ends, closing the gap ζ, η. A removable CrleSform, not shown, as in Pig. 2, is set just above the joint and filled with an insulating plastic mass 26 _f whereby ii © connection is established "

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The exemplary embodiments listed above can undergo numerous changes without departing from the scope of the invention.

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Claims (10)

-4- Claims 1 Δ method for connecting pipes or tubular parts, characterized in that a rough deformation of the outer surfaces of the loads to be connected is carried out and a mechanically resistant, hardening material is poured around the ends «, 2. The method according to claim 1 _9, characterized in that the rough deformation ier outer surface of the connecting ends zn by notches ,, incisions ₉ loops ₉ grinding or punching takes place. 3. The method according to claim 2, characterized gekenazeiohaet that. the notches or cuts are aligned so that they ate make an angle. 4. The method according to claim 1, characterized in that the coarse _s deformation of the outer surfaces occurs the anzueobli @@@ ends duroh bulging., By a flange or by a plugged-mounted ring. 5. The method according to Anspruoh 1, characterized in that the hardening material is a plastic or a metal low sohmelting point is. WR / Si -9- ■ 10981171293 -9 -. ■ ": ■■. ■■ ...-. ■ 6. The method, naoh one of claims 1 to 5, characterized in that that the casting of the hardening material is carried out in a simple body, which is a component the connection forms, 7. The method according to claim 6, characterized in that the mold is a Robrstüok, both ends of which are compressed are, 8. The method naoh claim 1, characterized in that the pipe ends are kept at a distance from each other., wherein the hardening material that establishes the connection consists of electrically insulating material. 9. The method according to claims 6, 7 and 8, characterized in that an insulating ring between the edges. the mold and the outer surface of the tubes is used. 10. The method naoh claim 8, characterized in that a tubular intermediate piece made of insulating material inserted between the pipe ends. 109811/1293