RU2332739C1 - Method of twisting wires for water-cooled cable and device for its performing - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: in the known method including cable wires ends fixing to receiving device, their subsequent drawing with concurrent wires twisting around core, the new consists in cable wires ends fixing to receiving device using terminal in which wires are pressed together with cable core, and wires twisting around core is executed by disk rotation at angular velocity that is found from empiric formula. To implement declared method for twisting wires of water-cooled cable device is offered which in contrast to known device for manufacturing additionally contains table and press for squeezing cable terminals. It is reasonable to insert short tubes in peripheral holes of disks. Suggested device allows to fabricate cables of definite length with embedding wires into terminals, at that effective wire twisting is performed taking in consideration various cable psrsmeters. Tubes installed in disks prevent wire damage during drawing.

EFFECT: widening of technical facilities arsenal, method and device for manufacturing cables of definite length with regard to required parameters and quality improvement.

3 cl, 2 dwg, 1 tbl

Description

The invention relates to electrical engineering, in particular to cable production.

A known method and device for twisting lengthy products, according to which the twisted cable elements are included in the twisting device with a constant given linear speed, twisting together due to the rotation of the frame, arrive in the form of a cable to the receiving device (see, for example, Babitsky O.S. , Lehtman L.Ya. Technology of cable twisting. M., "Energy", 1978, p.81). This method and its device do not allow you to adjust the angular speed of rotation of the twisting device, do not take into account the dimensions of the twisted wires and the specified cable parameters, which significantly reduces the functionality (for example, they do not allow the manufacture of core cables, water-cooled cables, etc.).

The closest in technical essence adopted for the prototype is the Method and device for manufacturing consisting of cable elements (patent DE 631929, H01R 43/06, 1936.06.29), by which the end of the finished cable is fastened to the receiving device, broaching with a constant linear velocity components of cable elements (wire ^{1) (1} electric wire (s) - cable article comprising one or more twisted wires, or one or more insulated conductors, on top of which depending on the laying conditions and ekspluata and there may be a light non-metallic sheath, a winding and (or) braid of fibrous materials or wire, and not intended, as a rule, for laying in the ground (GOST 15845-80 "Cable products (terms and definitions)")) with simultaneous twisting with using a twisting device in the form of a rotating and guide discs, worn on a pipe with a cable core passing inside. The pipe connecting the twisting device disks is mounted on a support, and the disks have peripheral openings through which the cable wires from the feeder pass. In this way, using a known device, it is impossible to obtain a series of cables of finite length, differing in wire sizes and specified parameters of satisfactory quality, since the required change in technological parameters (twisting step, linear and angular twisting speed) when changing the parameters of the manufactured cable is not taken into account.

The problem to which the invention is directed, is to expand the arsenal of technical means of the method and device for the manufacture of cables of finite length, taking into account the required parameters and with increasing quality.

To achieve the specified technical result in the known method, including attaching the ends of the cable wires to the receiving device, their subsequent pulling through the holes of the disks with the simultaneous rotation of the twisting disk around the core, it is new that the ends of the cable wires are connected to the receiving device using a tip, in which they are pressed together with the cable core, and the twisting of wires around the core is performed by rotating the disk with an angular velocity determined from the formula:

n _e = h * V * k ₁ * k ₂ * k ₃ * k ₄ * k ₅ * k ₆ ,

Where

n _e - empirical angular velocity of rotation, rpm

h is the step of twisting the wires, cm;

V is the linear velocity of the core, cm / min;

k ₁ - coefficient characterizing the diameter of the wire;

k ₂ - coefficient characterizing the number of wires;

k ₃ - coefficient characterizing the diameter of the core;

k ₄ - coefficient taking into account the flexibility of the wire;

k ₅ - coefficient taking into account the method of spacing the wires from each other;

k ₆ - coefficient taking into account the distance between the inner wall of the hollow core and the diameter of the wire.

After twisting the cable of a given length, the core and wires are cut on the table, the core and wires are inserted into the second tip and the second tip is crimped using a press.

The proposed method allows high-quality twisting of a cable of finite length, taking into account all the parameters of the required cable.

To implement the inventive method of twisting the wires of a water-cooled cable, a device is proposed that, in contrast to the known device for manufacturing consisting of cable elements (patent DE 631929, H01R 43/06, 1936.06.29 - prototype), containing a traction receiving device, guiding and twisting disks, mounted on a support tube and having peripheral openings, the twisting disk being rotatably mounted, it further comprises a table and a press for crimping the cable lugs. It is advisable to insert short tubes into the peripheral openings of the disks.

The proposed device allows the manufacture of cables of finite length with the termination of the wires in the lugs, while making effective twisting of the wires, taking into account various cable parameters. The tubes installed in the discs protect the wires from damage during broaching.

Figure 1 schematically shows a device for twisting the wires of a water-cooled cable, side view, figure 2 is a view of a twisting disk and a section of the table, figure 3 is an example of a table for determining the angular velocity.

The inventive device includes a traction device 1, consisting of an engine 2 and a winch 3 with a cable 4. The device includes a press 5, which serves to crimp the tips. Between the traction device 1 and the press 5, a table 6 is installed, the table top 7 of which has a cross-section in the shape of a channel, the shelves of which are arranged vertically. Behind the press, a torsion disk 9 and at least one guide disk (not shown) are mounted on the stand 8. A support tube 10 passes through the center of the discs, which is rigidly connected to the guide disc and on which the twisting disc 9 rotates. The twisting disc 9 rests on the rollers 11 mounted on the stand 8, so it can rotate around its axis. The disks have openings 12 in which tubes 13 are inserted parallel to each other. Tubes 13 serve to eliminate the seizure of wires 16 when twisting the cable.

Such a device allows for effective and high-quality cable twisting, taking into account various parameters of the cable being manufactured.

An example implementation of the method is given simultaneously with a description of the operation of the device.

The core of the cable 14 is passed through the support pipe 10 and fixed to the cable tip 15. Through the tubes 13 installed in the holes 12, wires 16 are passed, the ends of which are inserted into the corresponding holes of the tip 15 and crimped by the tip 15 using the press 5. To the tip 15 is attached a cable 4 of the traction device 1. Using the traction device 1, the cable core 14 is pulled and wires 16 with a constant linear speed V. Simultaneously rotate the twisting disk 9 with an empirical angular velocity n _e = h * V * k ₁ * k ₂ * k ₃ * k ₄ * k ₅ * k ₆ using a special drive (not shown ), which leads to a twist of wires 16 wok y cable core 14 at a predetermined pitch h. After twisting the cable of a given length L, the wires and the core of the cable are cut off on the table 6, the tail end of the core of the cable 14 is fixed on the second tip, the ends of the wires 16 are inserted into the holes of the second tip (not shown) and the tip is crimped using a press 5.

Depending on the cable length L, the twisting device may have one or more guide discs with holes mounted on the support pipe 10. The diameter of the tubes 13 and the support pipe 10 is selected depending on the diameter of the twisted wires 16 and the diameter of the cable core 14.

The determination of the correction coefficients k _i for establishing the empirical angular velocity n _e is as follows. To determine the coefficient k _i characterizing the diameter of the wire 16, in the process of twisting a prototype cable of length L, consider the number of revolutions N of the wire 16 around the core 14, providing a given winding pitch h. Then determine the empirical angular velocity n _e , expressing it through the coefficient k ₁ in relation to the theoretically calculated angular velocity n:

n _e = h * N / L = k ₁ * n

Having made several cables of the same diameter and averaging the coefficient k ₁ for cables with wires of this diameter, we proceed to determine the coefficient k ₁ for cables with other values of the diameter of the wires. The obtained average values are summarized in table 1. Similar tables are made for cables with different number of wires 16 (coefficient k ₂ ), with different core diameters 14 (coefficient k ₃ ), with wires 16 of different degrees of flexibility (coefficient k ₄ ), for cables with in different ways of spacing wires from each other (coefficient k ₅ ), for cables with different distances from the inner wall of the hollow core 14 to wire 16 (coefficient k ₆ ).

Claims (3)

1. The method of twisting the wires of the water-cooled cable, including attaching the ends of the cable wires and then pulling them through the holes of the disks with the simultaneous rotation of the twisting disk around the axis of the cable core, characterized in that the ends of the cable wires are connected to the receiving device using a lug into which they are pressed together with the cable core, and the rotation of the twisting disk is carried out with an angular velocity determined by the formula n _e = h · V · k ₁ · k ₂ · k ₃ · k ₄ · k ₅ · k ₆ , where n _e is the empirical angular velocity of rotation, rpm h is the step of twisting the wires, cm; V is the linear velocity of the core, cm / min; k ₁ - coefficient characterizing the diameter of the wire; k ₂ - coefficient characterizing the number of wires; k ₃ - coefficient characterizing the diameter of the core; k ₄ - coefficient taking into account the flexibility of the wire; k ₅ - coefficient taking into account the method of spacing the wires from each other; k ₆ - coefficient taking into account the distance between the inner wall of the hollow core and the diameter of the wire. 2. A device for twisting the wires of a water-cooled cable, including a receiving device, a guide and twisting disks mounted on a support tube and having peripheral holes, the twisting disk being rotatably installed, characterized in that the device includes a table and a press for crimping cable ends . 3. The device according to claim 2, characterized in that the tubes are installed in the holes of the disks.

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