ES2253936A1 - Elastic piping has helicoidally curved U profile having wings continuously welded at edges - Google Patents

Abstract

The piping has a helicoidally curved U profile having wings of suitable length continuously welded together at the edges. The size of the helix within the profile is correlated to the diameter and length of the piping.

Description

Pipe with helical reinforcements.

Object of the invention

The present invention, as expressed in the set forth in this specification, refers to a pipeline with helical reinforcements, which has been devised for the purpose of manage to form tubes of any diameter and length, using a "U" section profile and helically curved, presenting in its structure a helical reinforcement that allows use lower sheet thicknesses to resist pressures internal and external to which the pipe is subjected.

Background of the invention

Currently the pipe sections are manufactured and large diameter ducts, without reinforcements. To withstand older internal and external pressures resort to thick walls adequate, which lead to excessive weight gain and high Stiffness in the sections.

Efforts due to external pressures, It is known to produce ovalization of pipes and over all in large diameter pipes, so it is necessary oversize the thicknesses with which these are manufactured pipes, or adopt systems such as propping up the pipe and cover it with concrete so that it is this that absorbs the external efforts

For its construction, conventional pipes have expansion joints installed to absorb the dilations or contractions in the longitudinal direction of the driving.

When it is necessary to proceed with the installation of valves in the pipes, you have to have some expensive parts that They are called anchor reels, being their mission to transmit the stresses that occur when a valve closes, at a reinforced concrete die that will be responsible for absorbing efforts

Description of the invention

In general, the pipe with reinforcements Helical, object of the invention, has a structure defined by a longitudinal profile with a "U" section and helically curved, welding the extreme edges of the wings in contact with its section once curved, with continuous welding and in an automated way

With this type of pipe with reinforcements, it they get several advantages that current pipes do not have, since that due to its configuration with reinforcements, the thickness of the sheet to resist internal and external pressures, such as We have indicated above.

The efforts due to internal pressure are absorbed by the sheet making all the generatrices work of the tube, and by the helical reinforcements in which the sheet is of song, most of the effort transmitted by the internal pressure It is therefore possible to size the pitch and the edge of the reinforcement so that each pipe diameter and according to the pressure internal to be supported, are optimal for the thickness of the sheet to be used is as small as possible, thus obtaining a large saving in material consumption.

With the pipe with helical reinforcements, that the  invention proposes, the edge of the reinforcement can be sized to that absorbs internal pressures (land load, passage of vehicles, etc.) and avoid oversizing the thicknesses, or the protect the pipe from external forces with concrete, as is habitual.

By the configuration that presents the pipe with helical reinforcements, allows to absorb dilations or contractions in the longitudinal direction of the pipe, saving having to install expansion joints. In addition, it allows the moderate curvature of the conduction, being able to adapt to ditches in curve, avoiding having to install elbows and their corresponding anchors

It is also possible to eliminate the installation of conventional anchoring reels when valves are coupled in the pipe, since the effort is transmitted through reinforcements, to the concrete die.

The helical reinforcement defined by the wings already welded, allows tube walls to have smaller thicknesses since the resistant action of these double helical walls of reinforcement, they contribute greatly to withstand the pressure that requires the pipe or conduction.

To facilitate the understanding of characteristics of the invention and forming an integral part of this Descriptive report, a sheet of plans is attached in whose figures, with an illustrative and non-limiting nature represented the following:

Brief description of the drawings

Figure 1. It is a schematic elevation view longitudinal, of a pipe with helical reinforcements, according to the invention, including a larger scale detail to appreciate the formation of its structure.

Figure 2. It is a profile view of what is shown in figure 1.

Description of the preferred embodiment

Referring to the numbering adopted in the figures, we can see how the pipe with reinforcements helical, which the invention proposes, is referenced in general with the number 1 and constituted by spiraling a "U" profile 2, with wings 3 facing outward naturally so that the soul is smooth, as seen in the enlarged detail of figure 1.

The wings of the "U" profile 2 constitute the double wall helical reinforcement for pipe 1, welding the edges of said wings 3 with continuous welding 4.

The pitch of the propeller will be calculated in in line with the characteristics that the pipeline must meet, depending on both the diameter and length of the tube, and the internal and external pressures to bear.

Claims (1)

1. Pipe with helical reinforcements, characterized in that it consists of a tube whose walls are formed by helically curving a "U" profile (2) with the wings directed to the outside and continuously welding the edges of the wings (3) in contact with a once curved, the passage of the propeller being the most convenient to the diameter and length of the tube, and the wings (3) of the profile (2) of a length depending on the pressures that the tube has to bear.