DE1987952U - DEVICE FOR THE PRODUCTION OF WORK PIECES IN THE FORM OF REVOLVING BODIES FROM BLOCK THERMOPLASTIC MATERIAL. - Google Patents

Description

Soeiete WAOTER-ISOFI-ISOLATIOH, Paris, France

Device for the production of workpieces in the form of Revolving bodies from blocks of thermoplastic Materials

The innovation relates to the production of in Workpieces made of blocks of thermoplastic material in the form of bodies of revolution.

In particular, the innovation is aimed at production of pipe elbows made of thermoplastic materials for the insulation of pipelines.

Me drawing shows in

Pig. 1 such a pipe bend in elevation and in Fig. 2 in head view.

Bank account: Dresdner Bank AG Herne 2436 · Postal checking account: Dortmund 558 68 · Telegram address: Bahrpatente Hernewestfalen / Babetzpat Munich

The elbows have the general shape of a part a torus or ring body with a circular cross-section and consist of two identical elements 1a-1b, the are arranged along a connecting plane 2 above the pipe 3 to be insulated.

This toroidal part is subdivided into various limited sections according to the usual manufacturing processes separated along the planes P, which pass through the central

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PunktKdes torus and perpendicular to the plane containing the directrix of the torus. In practice, the torus sectors defined in this way are replaced by οscaling cylinders, one of which is indicated at A BCD in Figures 3 and 4 and which is obtained if half-cylinders or cylinder parts with a circular base and straight generating surfaces are cut off according to suitably selected planes. The half cylinders or cylinder parts are themselves cut from parallelepiped blocks of suitable thickness.

The prerequisites for such an approach are particular following ι

- The numerous connection levels cause significant thermal losses, which reduce the efficiency of the Decrease insulation.

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- The pipe elbows produced give an angled and therefore unsightly picture. If you want to improve the view, then you have to remove the angled parts by grinding or other processing _5, which reduces the strength of the insulation.

The cut of the various half-cylinders or cylinder parts with an inclined base, the connection in several planes, the insertion The various elements and the sanding of the angled parts require more manual labor than doing the elbow The insulation is made from two half-shells of toroidal shape is therefore less durable.

- The various elements are relatively brittle and there are losses during processing »

- The consumption of funds is significant »

The! Inflation makes it possible to eliminate these disadvantages and $ to achieve substantial advantages.

According to the hiring, starting from a block made of thermoplastic material, the turning piece is cut into the block by means of an electrically heated tray from ₉ which has the shape of the directrix of the body to be produced and is rotated around the axis of this body »

To the. Preparation of elbows in particular for insulation of pipes used to heated two semicircular concentric wires _s corresponding to the outer and inner surface = generate the pipe bend.

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With this approach, lan achieves the following in particular Advantages:

- Because there is only one connection level, the efficiency of the insulation for the elbow is just as good as for straight parts of the pipeline * *

- The shape of the elbow is geometrically exactly toric and thus an excellent external appearance is obtained.

- The elbows of the pipeline and the insulation are in contact with one another at all points.

- The installation times for the insulation are significantly reduced.

- Consumption on. Grouting agent is reduced to a minimum.

- The use of manual labor for the insulation of a pipe elbow is compared to that of the usual Procedure on the order of $ 50.

- The elbows can be directly at the construction site and can be produced according to all desired sides if required, which is stockpiling in the warehouse or in the factory avoids.

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As materials, especially for the manufacture of Insulation pipe elbows, expanded thermoplastic Zeil- or Sehaumkunststoffe are preferably used, for example expanded polystyrene, polyurethane foam etc.

In one embodiment, the optic filaments are of this type arranged that the connecting plane is the equatorial plane of the torus forming the elbow.

According to a further embodiment, the cutting threads are arranged such that the connecting plane of the Section plane of the torus corresponds to a cylinder whose axis coincides with the torus neck and whose Radius R is that of the torus.

According to one embodiment of the furnace contains a device in particular for the production of insulating Elbows cutting lines, which are attached to a carrier by means of slides, the position of which is adjustable, the carrier itself being fixed with respect to the axis of rotation of the Device sits.

The carrier is advantageously made up of two mutually parallel Rails formed, which are used to power the heating wires via the slide.

The following are examples of the innovation are explained in more detail. The drawings show in

Pig. 5 shows a perspective view of a first embodiment for the production of pipe bends;

Pig. β is a perspective view of a second embodiment for the production of pipe elbows;

Pig. 7 is a schematic electrical circuit diagram;

Pig. 8 shows a perspective illustration of an embodiment for producing workpieces in the form of FIG. Sehalen or pelvis;

Pig. 9 shows a section through such a workpiece;

Pig. Fig. 10 is a view of a modified embodiment for the production of insulating layers for coupling flanges and valves.

The Pig embodiment. 5 allows creation of ear bends, the connecting plane of which corresponds to the equatorial plane of a lorus. It contains a carrier of two parallel to each other. Rails 4a, 4b, which are mounted on a housing 5, the one! transformer

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Contains power supply and on the pivot bearing 6 of the Apparatus "is attached.

Four slides 7a, 7b, 7c and 7d can be moved into desired positions on the two rails 4a and 4b. These slides serve to accommodate and supply power to the two cutting wires 8 and 9. A roller 11 can be provided at the end of the rails 4a and 4b in order to support the apparatus as it circulates around the pivot pin 6. This circulation of the threads in the thermoplastic foam, which is inserted under the rails 4a, 4b, leads to the fact that the material is cut out in the form of half-shells.

The circuit diagram according to Pig. 7. shows how the power supply of tendon wires 8 and 9. The primary winding of the transformer can have several taps, to be able to choose the output voltage according to the needs.

The Pig embodiment. 6 enables manufacture of pipe bends, the connection of which is cylindrical and perpendicular to the equatorial plane of the torus. The cutting wires 12a and 12b are on the slides 13a, 13b, 13c, 13d mounted in any position on a carrier that is formed by the rails 14a and 14b. The rails are

mounted on a slide 15 _{movable on rails 16a s} 16b attached to the housing 17 which houses the power supply transformer. The housing 17 itself is mounted on the pivot 18 *. The rigidity of the arrangement is ensured by a support 19 which is arranged parallel to the rails 16a and 16b and on which a slide 20 can be moved, which is fixed to the rails 14a and 14b »

The power supply of the tendon wires 12a, 12b goes as in the previously described embodiment in front of you »

In the foregoing, the principle of the firing was in particular in the application on the production of insulating pipe elbows discussed for pipelines «Of course, the price increase is not limited to this area of application; but can be used wherever it is a question of the production of workpieces in the form of bodies of revolution »

The arrangement according to]? Ig »8 contains one on a slide 22 mounted cutting wire21. The slide 22 is of a rail 23 which is fixed to the housing 24 of the transformer and movable about the pivot 25. This arrangement allows workpieces to be cut out 26 (! Ig »9) made of thermoplastic material, which are required for the insulation of equipment floors,

which present themselves in the form of a non-developable surface of revolution, the generating of which is a circle, an ellipse or any other curve. These floors can have a flat outer surface in order to simplify the sheet metal cladding.

With the modified embodiment according to Pig. 10 with the cutting wires 28, 29a and 29b, which are mounted on the axis of rotation 30, can be made from blocks 31 Thermoplastic material received workpieces that serve to isolate flange pieces and valves and have minimal connecting surfaces.

Protection claims;

Claims (8)

P.A.18319 ^ 28.3. Protection claims ϊ 1. Device for the production of workpieces in the form of bodies of revolution made of blocks of thermoplastic material, characterized by at least one electrically heated, for cutting out the thread used for the block, which has the shape of the directrix of the workpiece to be created and revolves around the axis of the workpiece. 2. Device according to claim 1, in particular for production of pipe elbows for thermal insulation of pipelines, thereby marked e t that two semicircular concentric heated wires (8, 9) are provided which around revolve around an outer axis (6) lying in its plane. 3. Apparatus according to claim 2, characterized .g e k e η η - ζ e i c h η e t that the cutting wires are placed in such a way are that the connecting plane of the workpiece is the equatorial plane of the part forming the pipe bend of the torus is. - 11 - - 11 - ■ .. ■■ '- .. 4. Apparatus according to claim 2, characterized in that the tendon wires are arranged such that the connecting plane of a cutting plane of the torus corresponds to a cylinder whose axis coincides with the axis of the torus and whose Radius is equal to that of the torus. 5. Device according to one or more of the preceding claims, characterized in that the electrically heated tendon wires (8, 9; 12a, 12b; 210 with the help of adjustable runners (7a, 7b, 7c, 7d; 13a, 13b, 13c, 13d; 22) are mounted on a carrier (5; 17 »24) which itself is connected to the The axis of rotation (6; 18; 25) of the apparatus is fixed. 6. Apparatus according to claim 5, characterized in that the carrier is on a housing (5J 17-24) is mounted, which is the supply transformer for the cutting wires and is fixed to the axis of rotation (6; 18; 25). 7. Apparatus according to claim 5 or 6, characterized in that g e k e η η show that the carrier is formed by two parallel rails (4a, 4b; 14a, 14b) on which the Sliders (7a, 7b, 7e, 7d; 13a, 13b, 13e, 13d) carrying cutting wires (8, 9; 12a, 12b) are displaceable. - 12 - 8. Device according to one or more of claims 5 to 7, characterized in that the power supply of the cutting threads (8, 9; 12a, 12b) takes place via the rails (4a, 4b; 14a, 14b) of the carrier.