DE8116161U1 - Socket connection for the ends of two pipe sections - Google Patents

Description

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Applicant: Erwaeta Bohrtechnik GmbH, Plintkampredder 10, 2 300 Kie-1 1

Socket connection for the ends of two pipe sections

The invention relates to a socket connection for Ends of two pipe sections, in particular to be driven into the ground.

In order to achieve a fully sealing connection of pipe sections that can be assembled to form any pipe lengths the ends of two abutting pipe sections are connected in known manner by a sleeve with an internal thread was screwed onto the threaded ends of the pipe sections. This has mainly happened with pipe sections butting against one another, which are successively driven under the respective socket connection into the ground, through dams or the like, in order to e.g. To obtain exchange probes for the geothermal energy of a heat pump operation or protective pipes e.g. for cables to be laid.

The manufacture of threaded sockets and the threads on the Pipe section ends make such probes or protective tubes quite considerably more expensive and lead to a considerable amount of work, in particular when the probes or pipe lengths are assembled from many pipe sections of short length.

The object of the invention is to provide an absolutely tight To achieve socket connection for abutting pipe section ends, which is particularly inexpensive and very easy to achieve is to be installed. ■

This object is achieved according to the invention in that, in the case of cylindrical pipe section ends, the sleeve is approximately from the center from or in the case of a cylindrical socket the pipe sections have or have conical surfaces running towards their front ends, and a surface part opposite it after the sleeve has been forced over the or pushing in the socket into the pipe section ends of different diameters to create a radial one Deformation pressure cLuf have the pipe section ends.

With this solution, when using cylindrical pipe section ends to provide the sleeve only with the two conical surfaces extending from or approximately from the center, or at cylindrical sleeve for the pipe section ends each with a console surface running to the front ends and then the pipe section ends are to be pushed into the socket with axial pressure or pushed onto the socket, with one length part of the conical surfaces exerts a radial deformation pressure on the opposite longitudinal part of the pipe section ends that the pipe sections are caused to expand or shrink along this length part, thus creating an absolutely tight, guaranteed easy connection between two pipe sections.

According to the invention, it is also possible to proceed in reverse, in that in the case of a cylindrical socket the pipe section ends are each provided with a conical surface and axially into the socket or be pushed onto the sleeve, whereby a radial deformation pressure is exerted again by the conical surfaces, which the perfect sealing connection guaranteed.

The socket connection according to the invention is particularly advantageous

part of in the ground, through earth dams or the like I

Can be used for driving short-length pipe sections, but can i

can also be used for pipelines that can be laid freely. |

The invention is explained below with reference to the drawing, * in the exemplary embodiments shown in FIGS. 1, 1a, 2 and 3 as axial Sections through a socket connection of two pipe sections with different designs of the socket and that in the socket butting pipe section ends are shown.

According to the example of Figure 1, the sleeve 1 is designed as a cylinder sleeve. The two pipe sections 2 and 3 to be connected, especially short lengths, for example 1.5 to 3 meters in length, have outer, little converging conical surfaces 2a and 3a on their ends. The pipe sections 2, 3 with the conical surfaces 2a, 3a are pushed into the socket 1 by axial pressure, the diameter, starting from the base of the conical surfaces, being somewhat larger than the inner diameter on a length part of the cylindrical sleeve 1, so that on this length part at \

Pushing in a radial deformation pressure is exerted on the pipe section ends, which causes a shrinkage of the pipe section ends causes a perfect sealing of the pipe section ends to be connected is guaranteed. To with axial insertion the pipe section ends in the socket a displacement of the socket in one direction or the other on the pipe section ends To avoid this, the pipe section ends are provided with a step 5 that slightly reduces the pipe section diameter, the distance between which after the pipe section ends have collided is equal to or approximately equal to the length of the socket. The base the conical surface is then formed by the step 5.

For the example according to FIG. 1, it is also possible according to FIG. 1a to use the conical surfaces 2a and 3a and the step 5 on the inside of the pipe section ends and then insert the cylindrical sleeve 1 into To be laid inside, which means that the pipe section ends have to be pushed onto the socket and thereby cause an expanding deformation the pipe section ends occurs.

to further simplify the socket connection, remain Figure 2 and 3, the pipe sections 2, 3 cylindrical over the entire length, and then the sleeve 6 is advantageous approximately halfway along with an inner ring flange 7 for fixing the position of the sleeve to the pipe section ends, against which the front ends of the pipe section ends to be pushed into the socket comes to rest. The sleeve 6 is in this case starting from the annular flange 7 in two to the socket ends little

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diverging conical surfaces 6a and 6b provided on a from the annular flange 7 extending longitudinal part 8 have a diameter which is slightly smaller than the outer diameter the pipe section ends, so that when the pipe section ends are pushed in in the socket again a radial deformation pressure is exerted on the pipe section ends, which ensures the tight connection of the Pipe section ends guaranteed.

It is also possible to design the sleeve according to FIG. 2 with cylindrical inner surfaces and then the pipe section ends again to be provided with a conical surface which converges somewhat towards its front ends, as indicated in FIG. 1 with 2a and 3a is, whereby the radial deformation pressure is also exerted when the pipe section ends are pushed into the socket.

Finally, according to FIG. 3, the sleeve 9 can have an outer annular flange 10, starting from the annular flange, with somewhat converging conical surfaces 9a and 9b are provided, the pipe section ends then on the conical surfaces 9a, 9b under axial pressure up to the stop 10 to be postponed. In this case, the diameter of the conical surface 9a, 9b is on a level starting from the flange 10 Length range 11 selected to be somewhat larger than the inner diameter of the cylindrical pipe bowl 2, 3, so that here too a radial deformation pressure is exerted by pushing the pipe section ends onto the socket is exercised on the pipe section ends with widening of these ends, which ensures the tightness of the socket connection.

Claims (3)

Expectations 1. Socket connection for the ends of two, especially ins Pipe sections to be driven into the ground, characterized in that, in the case of cylindrical pipe section ends, the socket (6, 9) from about the middle or in the case of a cylindrical socket (1) the pipe sections to their front ends § chen (6a, 6b, 9a, 9b, 2a, 3a) has or have which and an opposite surface part after compulsory Sliding the sleeve over or pushing the sleeve into the colliding pipe section ends different Have diameter for generating a radial deformation pressure on the pipe section ends. 2. socket connection according to claim 1, characterized in that that the sleeve (1) reducing by the outer or inner diameter Graduations (5) of the connecting pipe section ends is set in their position relative to the pipe section ends. 3. socket connection according to claim 1, characterized in that that the sleeve (6, 9) advantageously has an inner or outer annular flange (7, 10) in the center, which has a stop forms for the ends of the pipe sections.