DE1900774U - REINFORCED PLASTIC PIPE. - Google Patents

Description

DIpI. Ing.Fr. Thalmann '* ^ /

Dipl. Ing. H. Schmitt |

Patent Attorneys £ "\

Freiburg i. Br, I

Karlstrasse, 23 Part. 3 2199

Company Piastrex-France S, A _o R, Lo, Malhoase (France)

Reinforced plastic pipe

The price increase affects a plastic pipe, which by layer by layer Wrapping of impregnated with plastic Thread is made "A pipe made in this way already has a relatively high strength"

The purpose of the hiring is to provide such a drill with an even better one To create strength »You can manufacture the pipe in such a way * that the threads have a slight tendency to Eohr cross-sectional area run- Then they lie in the Pipe walls with a low angle of inclination and are particularly suitable for absorbing those stresses caused by overpressure in the pipe »You can use the reinforcement threads but also apply with a large slope so that they have a large angle of inclination with respect to the Eohr cross-sectional area have »Then the threads contribute more to increasing the tensile strength in the longitudinal direction of the pipe»

Based on this knowledge, the present innovation proposes a pipe in which the reinforcement threads in a special way with different angles of inclination

the angle core or are applied to the pipe being created.

The inner thread layers can preferably be made with a smaller one and the outer thread layers with a stronger one Provide rolled up angle of inclination to the pipe's longitudinal axis. This has the advantage that the inner thread layers can then easily absorb the pressure coming from the inside of the pipe. the outer thread layers, however, which have a larger angle of inclination, contribute to the same tube to the Absorb tensile stress in the longitudinal direction of the pipe. Possibly Additional layers of thread can be fed to the resulting pipe in at least one area.

To produce one of the innovations corresponding to the innovation, a winding machine is used with advantage, which is used for the feed of the thread guide and for the rotary movement of the winding mandrel each has a separate, controllable drive.

The innovation and its details are shown in more detail below in exemplary embodiments with the aid of schematic drawings explained. Show it:

Fig. 1 is a plan view of a winding machine for

Production of the new plastic pipe,

2, 3 and 4 are views of reinforced plastic pipes,

that can be produced with this machine.

A winding machine designated as a whole by 1 for production from the furnace corresponding reinforced plastic pipes has a winding mandrel 2, which is in the bearings 3 is held and driven by the motor 4. There is a rotation indicator at one end of the winding mandrel and a device 6 for regulating the speed of rotation of the mandrel 2.

Lift the Yfickeldorn 2 is a parallel to the longitudinal axis of this Winding mandrel displaceable thread guide 7 arranged. It gets its back and forth movement through a chain and a chain drive 9 · This is according to the innovation with a special drive motor 10, a device 11 for regulating the speed of the drive and a rotation indicator 5 '. Furthermore, with the thread guide 7 still limit switch 12 and a control relay 13 attached.

For the purpose of producing a plastic pipe it 14-, as it is the Corresponds to innovation, the reinforcement threads 15 of the The thread guide 7 is held in an orderly manner up to the winding core 2 Expediently, numerous threads 15 held in parallel run through this thread guide in the manner of a ribbon. In the Production of the ear is then a band-like group 16 of threads 15 helically next to each other on the Winding core or applied to a thread layer. Depending on whether the thread guide is from left to right or from the right

runs to the left, results in mirror symmetry, but their size has the same angle of inclination.

According to a special feature, the threads 15 should now have different thread layers in the sense of the innovation Pitch angle ^ L on the winding mandrel 2 or on the lower! thread layers are applied. The angle dv can assume values between 5 ° and 75 °.

In FIG. 4, two groups of threads are indicated 17 and 18, which have been wound with a different pitch angle to the EOHR 14a · When choosing different pitch angles, it is advantageous to provide the inner thread layers with a smaller angle of inclination ^ '(ki, and the outer yarn layers dv with a larger angle of inclination.? ', cL _t. to be provided. in such an embodiment of the plastic tubes, the inner, extending approximately in the cross-sectional plane of the Eohres reinforcement threads 15 can well receive the derived from the feed liquid in the EOHR internal pressure. the large with a pitch angle The arranged threads or layers of threads, on the other hand, are largely oriented in the longitudinal direction of the ear. They can therefore absorb tensile stresses running in the longitudinal direction of the ear particularly well. A corresponding combination of thread layers with a small and a large angle of inclination can give the pipes a strength, their special application ck is specially adapted.

If necessary, you can also, the resulting pipe in at least feed additional thread layers to an area so that a longitudinal cross-section corresponding to the tubes 14b and 14c according to FIGS. 2 and J results. This enables a particularly favorable utilization of the material. For example In the case of a tube 14b which is to have a connecting sleeve 19 at one end, additional layers of thread can be used raise. It is particularly advantageous that the threads required for this at the end of the pipe also have a small pitch angle can be wound up. This avoids waste. At the end of the pipe, the thread groups 16 are turned over from the forward movement into the forward movement, resulting in a piece of pipe that cannot be used later, that must be cut off as waste. This piece of waste is larger, the wider the thread group 16 and the larger is greater the pitch angle.

In order to keep the manufacturing costs low, the width of the thread group must not be made too small, so that this a certain minimum width of the lost end is already given. You can then do this by choosing one Keep the slight angle of inclination in the area of the pipe end small.

If a plastic pipe is to be subjected to bending stress, one can adapt its cross-section well to the bending load, as the embodiment 14c in FIG. 3 shows. here you can attach 20 additional thread layers with large angles of inclination in the middle area. In addition, the

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Use of thread layers with large angles of inclination in the central area of the pipe, the waste at the pipe ends not enlarged.

I'm another application example for the use of different The pitch angle of the threads 15 consists in the fact that in the region of a thread provided in the pipe Threads 15 according to the thread pitch and optionally arranges in the opposite direction. This results in a particularly strong thread.

The previously known devices for the production of reinforced plastic pipes are already equipped with a winding mandrel and a thread guide equipped. However, the feed of the thread guide and the rotary movement of the winding mandrel were over a change gear connected to a single drive Tube only has a single pitch angle for the threads 15 determine. This changed mirror-symmetrically as the thread guide went back and forth. A change in the angle of incline by installing other transmission gears between the winding mandrel and thread guide drive or by actuating a changeover gear is not possible because the pipe should be made by continuous winding.

To produce the plastic pipe described above, In the sense of the innovation, a winding machine is now improving

proposed in the case of the winding mandrel 2 with its own adjustable drive motor 4 · stranding. Also owns the thread guide 7 then also has a particularly controllable drive motor 10. The pitch angle is self-evident also changeable during the vetch iv or ganges.

Claims (3)

FIA / Π i / Π <~> · 5 "> Ύ Pf: A.4S4 * r93 * iii o ^ protection claims 1) Reinforced plastic pipe, made by layering Wrapping threads on top of one another Winding mandrel or the like. Which these threads in one to the Hohrachse inclined angles are supplied iss, characterized that the threads (15) with different pitch angles (Jv) are applied to the Uickeldorn (2). 2) plastic pipe according to ünspruch 1, characterized in that the inner thread layers with a low ( .} ._ ■ φ _) and the outer thread layers with a larger angle of inclination (^ j 'Jv ..) applied to the core or the hearing body are. 3) plastic pipe according to ünspruch 1 or 2, characterized in that the resulting drilling in at least one area (19 ₅ 20) additional thread layers are fed. Patent attorney