SU936467A1 - Device for heating-up solder - Google Patents

Description

(54) DEVICE FOR WARMING UP THE SCAN

  one

The invention relates to devices for repairing cables, in particular to devices for melting solder during splicing of the cores.

Splicing the cable cut to its damage is usually done by tinning its lived by immersing it in molten solder. Particular difficulties in connecting cable lengths occur in coal mines that are hazardous to coal dust, where the use of traditional methods of heating solder, for example, using an electrospiral flame, of a burner is unacceptable under explosion-proof conditions. At the same time, the repair of cables is advisable to carry out in the mine, as this reduces the repair time and transportation costs.

Of the known devices in which it is relatively easy to ensure the condition of the explosion safety are induction heaters, since

In THEM, the energy for heating the electrically conductive bodies is transmitted through an electromagnetic field.

In the field of electrothermics, for example, induction channel furnaces containing a bath, under which the inductor and the magnetic core are placed, are used to melt metals.

However, these furnaces have a sufficiently high reactive power.

The closest in technical essence and effect achieved is a soldering-heating device containing an inductor with a laminated magnet drive and a chamber with channels communicating with the internal cavity of the chamber fsj.

Claims (1)

However, this device has a complicated structure, is not reliable enough in operation, and it is inexpedient to use it for splicing the cable cores in mine conditions. 3 The purpose of the invention is to simplify the design and increase the reliability. The goal is achieved in that the device and the inductor are W-shaped, the chamber is installed as a bath mounted on the rods of a ferromagnetic sheet material with a ferromagnetic plate fixed in it and having on the side facing to the development, in the area between the rods of the magnetic conductor, grooves forming mutually perpendicular channels with the surface, some of which are parallel to the ends of the rods, while others communicates with the indicated channels and with the internal cavity of the bath. FIG. 1 shows the proposed device; in fig. 2 shows section A-A in FIG. one; in fig. 3 - time. Cut BB in FIG. 1 (longitudinal section of the ferromagnetic plate). The device contains an Ш-shaped magnetic core 1 with an induction coil 2 on an average rod, a bath 3 made of ferromagnetic material, mounted on free rods of a Sh-shaped laminated magnetic core 1. A ferromagnetic plate 4 is rigidly attached to the bottom of the bath 3 , made of structural steel, having the form of a base, with grooves in the body of the plate 4 facing the plane of the base of the bath 3, located in the areas of the ferromagnetic plate 4 between the rods of the U-shaped laminated magnetic core 1 and form when the ferromagnetic plate 4 is connected to the base of the bath 3, channels 5 and 6 extending into the interior of the bath 3, the channels 5 parallel to the cores of the magnetic circuit I, and the channels 6 are perpendicular to the channels 5, with channels 5 ib and bath 3 is filled with solder 7. The device works as follows, the ship being repaired is being cut and prepared for splicing of the cores. The bath 3, filled with solder 7, is installed on the rods of the H-shaped laminated magnetic circuit 1. A magnetic circuit is formed in which, after connecting the induction coil 2 to the power supply, a variable magnetic flux is created. In the heated device, in the sections between the rods of the magnetic circuit, the magnetic flux splits into two. A part of it passes through the base of the ferromagnetic bath 3 and its walls, another part through sections of the ferromagnetic plate 4, covered by short-circuited coils of solder 7. Short-circuited coils are formed when the bath is pre-filled with 3 channels 5 and 6 with molten solder 7. When a variable magnetic flux flows into the co-closed coils induce an emf, under the action of which the current flows through a naked wave of 7 in channels 5 and in a bath 3 to melt solder on the basis of tin, to equalize the temperature of the solder 7 over the entire volume The bath 3 of the latter and the ferromagnetic plate 4 are made of structural steel and are heated by the loss of electromagnetic energy when an alternating magnetic flux flows through them. With the same purpose, the design of the device provides channels 6 connected to channels 5 and having an outlet to the inside of the bath at its walls to transfer molten tin from channels 5 to distant, less heated parts of the bath 3. Heating intensity and time required to melt solder 7j depends on the size of the through channels 5 (sizes of short-circuited coils), as well as the brand of solder 7 used and averages 30-45 minutes. The conditions necessary to fulfill the requirements of explosion safety for the considered cable struction readily are performed by calculation of optimal parameters of the tank 3, the thickness of the ferromagnetic plates 4 and 5 through the channel sizes, after melting the solder 7 is carried by the cable splice lived known technology. The invention of the device for heating the solder containing the inductor with a soldered