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Online variable-frequency annealing device for rigid fireproof cable

A fire-resistant cable and annealing device technology, which is applied in the direction of cable/conductor manufacturing, circuits, electrical components, etc., can solve the problems of difficult cable annealing and low temperature, and achieve the effect of improving annealing performance and uniform heating temperature

Pending Publication Date: 2021-12-21
TAIYUAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the skin effect of the fixed-frequency induction heater, the outer copper skin has reached the softening temperature during annealing, while the temperature of the inner copper core is still very low, so it is difficult to achieve the overall annealing of the cable.

Method used

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  • Online variable-frequency annealing device for rigid fireproof cable
  • Online variable-frequency annealing device for rigid fireproof cable

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Embodiment Construction

[0020] For further understanding of the present invention, set forth in detail below in conjunction with accompanying drawing and embodiment:

[0021] Such as figure 1 and figure 2 As shown: the online frequency conversion annealing device for rigid fireproof cables of the present invention includes: a housing 1, an induction heating module and a cooling module; the housing 1 is provided with an induction heating module and a cooling module, and the cable is heated by a heating coil;

[0022] The induction heating module includes: heating coil 21 and frequency conversion control circuit 22; connect;

[0023] The frequency conversion control circuit 22 is: the positive pole of the power supply D is connected in parallel with one end of the inductance L1 and one end of the inductance L2, and the other end of the inductance L1 is connected in parallel with one end of the heating coil 21, one end of the heating capacitor group and the D pole of the field effect transistor Q1. ...

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Abstract

The invention discloses an online variable-frequency annealing device for a rigid fireproof cable, and belongs to the technical field of cable annealing. The online variable-frequency annealing device for the rigid fireproof cable is provided. According to the technical scheme, the online variable-frequency annealing device for the rigid fireproof cable comprises a shell, an induction heating module and a cooling module; the induction heating module and the cooling module are arranged on the shell, and the cable sequentially passes through the induction heating module and the cooling module; the induction heating module comprises a heating coil and a variable-frequency control circuit; and the variable-frequency control circuit provides an variable frequency electromagnetic field for the heating coil, so that the purposes of providing variable-frequency electromagnetic heating for the cable and heating a copper sheet and a copper core to achieve a uniform annealing effect are achieved.

Description

technical field [0001] The invention is an online frequency conversion annealing device for rigid fireproof cables, belonging to the technical field of cable annealing. Background technique [0002] During the rolling and forming process of rigid fireproof cables, subsequent rolling passes cannot be performed due to work hardening. Therefore, online annealing of cables is required to ensure continuous rolling of cables. The cable production line is tens of meters or even hundreds of meters long, so the traditional resistance furnace cannot complete the online annealing process, and the induction heating device can complete the annealing process. The rigid fireproof cable is a three-layer composite structure, from the outside to the inside are the outer copper skin, magnesium oxide powder and copper core. Due to the skin effect of fixed-frequency induction heaters, during annealing, the outer copper skin often reaches the softening temperature, while the temperature of the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/52C21D1/42C21D1/26C22F1/08H01B13/00C21D11/00
CPCC21D9/525C21D1/42C21D1/26C22F1/08H01B13/0016C21D11/00Y02P10/25
Inventor 梁红玉韩垒韩强
Owner TAIYUAN INST OF TECH
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