Device for reversing the twisting cable products from conductors, mostly in the form of filaments, bundles of conductors or optical fibers

 

(57) Abstract:

Usage: reverse twisting of conductors, such as thread, wire items, bundles of wires, optical fibers. The inventive device includes a stationary dividing element 2 with holes for supply conductors 1 or optical fibers, Vivaldi element 3 is made to rotate in opposite directions and with holes for conductors 1 or optical fibers, and fixed between them to rotate in opposite directions about its longitudinal axis, the Central element 5 located around it with the possibility of contact with the peripheral tubes 6, intended to pass through them twisted conductors 1 or optical fibers, one end parts fixed in a stationary node 2 and the other - swivel node 3. Contact the peripheral tubes 6 with the Central unit 5 is implemented by connecting them along the entire length through the radial part. 2 C.p. f-crystals, 6 ill.

The device is used for reverse twisting of conductors, such as thread, wire items, bundles of wires, optical fibers, and similar items is the number of different devices of this kind. In U.S. patent N 4974408, 04.12.90, CL N 01B 13/00, disclosed a device of this type as an example of prior art in this area. Most often, the device disclosed in the mentioned U.S. patent, it works absolutely flawlessly. However, in some cases it fails. In practice it was found that at high speeds of rotation of the tube bundle centrifugal forces cause displacement of the peripheral pipes radius, where they are not related. In the specified device peripheral pipes are connected through spaced elastic rings, the compression force acting on a certain longitudinal sections of pipe. Axial tightening force of the tubes in the bundle and the relative distance between the elastic rings determine the maximum speed of rotation. Exceeding this speed causes the peripheral pipes vyputyvayutsya outwards under the action of centrifugal force, slip the elastic ring in the axial direction.

The process of destruction is increasing. Also the Central pipe has a tendency to go from the periphery of the pipe, if it was stretched more external peripheral tubes. Another problem is the fluidity, which is a consequence of the properties of the plastics used as material for pipes. titsa be shortened several times. Later this fluidity is reduced, but not stopped. Because of the fluidity of the maximum packet length of pipes is limited, which, in turn, limits the maximum relative distance between the points of reversal. The third problem which is worth mentioning, is that you cannot make the desired axial tightening force due to the characteristics of the material used. This fact is manifested in the sagging of the tube bundle, which in turn leads to unwanted opening. We know from experience that a large sagging of the tube bundle increases the coefficient of friction between the tube and the conductor. Plastic, best for use as a material for pipes usually have a high coefficient of friction and low mechanical strength.

In previous decisions, the coefficient of friction between the pipe and the conductor was the most important factor affecting the number of turns in the same direction. Therefore, we have tried to achieve the maximum number of revolutions in the same direction, since in this case the point of changing the direction of spin can be placed far from one another, and this in turn improves the characteristics of cable telecommunications.

A the disadvantages of the known device.

This goal is achieved by the device according to the invention, which differs in that the peripheral pipes are connected almost along their entire length with the Central element through almost radial parts.

The advantage of the invention lies primarily in the fact that the radial connection of pipes to a Central element allows to apply high-speed rotation for the rotating head (tube bundle). Very high speed grouping and twisting is possible even with a small step size. The tube bundle does not limit the speed limiting factor is the engine. The design of the bundle of tubes according to the invention is safer and has a longer life than known devices. A Central element in the claimed invention cannot be ejected from the periphery of the pipe. In this construction the tube bundle will retain the initial length during the whole service life. Axial force tension on the bundle of tubes can be increased many times, thus enabling to effectively prevent untwisting. Between the pipe and the conductor is achieved less friction than before, because from experience it is known that the smaller the slack, the less friction. Thus, the length to ispolzovatsa different speeds of rotation of the rotating head. The rotating head and the bundle of tubes usually have a very high rotation speed with the constantly changing direction of rotation. Low friction between the pipe and the conductor will add the number of revolutions of the tube bundle in the same direction. The quality of complex cables better than was previously possible. The procedure of grouping or twisting does not cause any forces that adversely acting on the conductor, or any deformation, which, for example, stretched the conductor.

In Fig. 1 shows a device reversible twisting according to the invention; Fig. package 2 tubes used in the device (axial section in Fig. 1), according to the invention; Fig. 3-6 embodiment of the packages of pipes according to the invention.

In Fig. 1 number 1 denotes the conductors that are subject to twisting and 2 stationary dividing element located at one end of the conductor 1. Number 3 in Fig. 1 indicates Vivaldi element located on the other by the end of the course to twist the conductors 1, rotated in different directions. The number 4 refers to the bundle of tubes containing a Central element 5 and the peripheral tubes 6 surrounding it. The Central element 5 and the peripheral tubes 6 are pressed toward each tositsa to threads, provodnikovym items, bundles of conductors, chetyrehdyuymovym combinations, optical fibers and other similar items. Fixed a separate element 2 and the rotating Vivaldi element can be, for example, disks with holes.

In accordance with the essential feature of the invention the peripheral tubes 6 are connected almost the entire length of the stationary Central element 5 by means of the radial parts. This design is particularly well seen in Fig. 2, where the bundle of tubes 4 are shown along the axis.

The term "peripheral pipe" in this context is understood very widely, it is not only a pipe of circular cross section, but can be other shapes. Fig. 3-6 show various options packages pipes. In Fig. 3 pack of pipe indicated by the number 10, the Central element is indicated by the number 11, and the peripheral tube is number 12. In Fig. 4 pipe package is marked with the number 13, the Central element number 14, and the peripheral tube 15. In Fig. 5 the tube bundle identified by the number 16, the Central element number 17, and the peripheral tube is number 18. In Fig. 6 pack of pipe indicated by the number 19, the Central element number 20, and the peripheral tubes 21. In Fig. 4-6 section of the peripheral pipes is almost sectnum element. Adjacent the peripheral tubes are separated from each other in all ways, and this allows them to twist and relatively move. At the same time, torque to twist the bundle of tubes will not be too large even for a bundle of tubes of large size. It should be noted that the number of peripheral pipes is not limited to the four shown in the drawings, the number is selected as necessary. The Central element may also be a pipe or a hollow structure, for example in Fig. 2 is a Central element of the solid of Fig. 3 is a pipe.

The filaments or fibers may be secured to the Central element and/or the peripheral wall of the pipe during manufacture. The filaments or fibers are shown by number 7. The filaments or fibers may be direct, i.e., along the axis of the wound with opposite pitch, or may have a mesh pattern. The filaments or fibers are designed to carry axial loads and to prevent the flow of plastic pipes. Filaments or fibers also affect the untwisting tube package, which was mentioned above, since the greater the force with which the package can be loaded in the axial direction, the more effectively prevented from untwisting. Threads or fibers can costed.

Another option to use in the manufacture of the tube bundle reinforced fiber plastic.

Pipes in the packages may also be made of other various materials, i.e., the outer surface of a material with good mechanical strength, and an inner surface from a material with very low friction. This allows you to minimize the friction between the conductors and the inner peripheral surface of the pipe that will allow you to get the cables and of higher quality. Packages of pipes made from two different materials, as shown in Fig. 2, 5 and 6, where the anti-friction material is marked with the number 8. This material may be polytetrafluoroethylene, which in itself is not a suitable material for tubular packages due to the weak mechanical properties. Other material can be plastic-type RA. You can also use more than two different materials for the manufacture of packages of pipes.

When made cable with reverse spin by using the device shown in Fig. 1, the conductors 1, you need to twist, stretch through the separating element 2 in the peripheral tubes and then through the rotating Vivaldi element 3 to the outside, for example, the SOP is tapering hole, where stranded conductors are tightly pressed to each other, thus forming a versatile twisted product. The nozzle 9 is not a necessary item. The finished product can, if desired, in addition to associate, in order to prevent untwisting. Any conventional spinning device or other similar device can be used for binding. Vivaldi element 3 is equipped with its rotating actuator preferably with chain sprocket, spur gear or toothed belt driven by the motor, the speed of which can be adjusted and automatically reversereverse, which is pretty simple. The common features described above relating to the work and use the device with versatile spin, i.e., the pulling of conductors, rotation of the tubular package, further processing of the product, etc. is well known to specialists in this field of technology, so the signs are not described in more detail. In addition, some signs are disclosed in U.S. patent N 4974408 mentioned above.

Variants of the embodiment described above do not limit the invention. It may be freely modified within the scope of the claims. It should be understood, Magny also other options. For example, the shape of the section of the peripheral tubes and their number is not limited to the shown on the sketches examples, such items may be freely modified in accordance with the need.

1. Device for reversing the twisting cable products from conductors mostly in the form of filaments, bundles of conductors or optical fibres, containing situated in the direction of travel subject to twisting of the conductors stationary distribution device and twisting device, mounted for rotation in opposite directions, and located between them to rotate in opposite directions, the Central element is made of elastic material, on top of which are located in close proximity from one another and connected elastic peripheral pipes intended for the passage to be twisting conductors, characterized in that the Central element is connected with the peripheral tubes along the entire length of its radial plots.

2. The device under item 1, characterized in that the walls of the Central element and/or peripheral pipes are reinforcing threads or fibers.

what's content the outer surface of mechanically strong material, and the inner surface of elastic material with a low coefficient of friction.

 

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