Heavy-current short-network direct attached gas shield three-phase electric slag furnace

Abstract

The invention provides a heavy-current short-network direct attached gas shield three-phase electric slag furnace, comprising a gantry type movable furnace body, a casting lifting platform, a crystallizer, a bottom water tank, an end heating device, a consumable electrode locating device upright, a crystallizer lifting platform, an electrode lifting system upright guide rod, a furnace body lower platform and a consumable electrode locating guide plate support, wherein the upper part of the casting lifting platform is provided with a system weighing platform, the system weighing platform is provided with an electrode clamping and lifting system, the electrode clamping and lifting system is fixed with 3-6 bearing conductive material rods which are symmetrically distributed, a consumable electrode is arranged and blocked below each bearing conductive material rod, each bearing conductive material rod is sheathed with a current collection slip ring, the current collection sliding ring is internally provided with a conductive electric brush, the bearing conductive material rod is contacted with the current collection slip ring in a sliding way, the current collection sliding ring is connected with one end of a direct attached short network, and the other end of the direct attached short network is directly connected with a transformer outlet terminal of a three-phase transformer, thus the electrical energy utilization ratio is improved.

Description

technical field [0001] The invention relates to a large-current short-network direct-connection gas-protected three-phase electroslag furnace. Background technique [0002] With the rapid development of my country's equipment manufacturing industry, there are more and more demands for low [H], low [O], high-density defect-free electroslag casting products required for the manufacture of nuclear power, aircraft and other major national engineering projects. However, the large-tonnage three-phase electroslag furnaces that can be designed and manufactured in China still have certain shortcomings, and they cannot fully meet the needs of the market. This is because: [0003] 1. The existing three-phase electroslag furnace does not realize gas protection. At present, the gas shield used in the three-phase electroslag furnace that has been put into production in the industry has not been sealed at the place where the electrode passes through, and has not been fully isolated from th...

AI Technical Summary

Problems solved by technology

At present, the gas shield used in the three-phase electroslag furnace that has been put into production in the industry has not been sealed at the place where the electrode passes through, and has not been fully isolated from the outside air, so it has not fundamentally solved the increase [H ], increase [O] problem

[0004] 2. The short network layout of the existing three-phase electroslag furnace is not perfect enough

The domestic three-phase electroslag furnace high-current short network that relies on a single transformer for power supply basically uses copper bars connected to cables or copper bars connected to copper pipes and then cables to connect cables, and the arrangement form of short networks from transformers to slag pools Multiple changes, large current window, long conduction medium, large heat loss, wasted energy

[0005] 3. The connection between the existing three-phase electroslag furnace body structure and the process is not perfect

At present, domestic large-tonnage three-phase electroslag furnaces all have a three-frame structure, and the electrode suspension system is unreasonable: ①The existing electrode suspension method is not conducive to the realization of three-phase independent melting speed adjustment and electrode weighing; ②Large-tonnage electroslag The furnace support arm is long, and it is easy to cause equipment instability when exchanging electrodes; ③The electrode suspension system of the existing three-phase electroslag furnace is not conducive to the realization of gas protection conditions; ④The electrode replacement of the existing three-phase electroslag furnace relies on manual work In-situ, so it is more difficult to install. It is necessary to avoid the installation obstacles caused by various equipment components, which takes a long time. At the same time, it is difficult to align the electrodes. It depends on the naked eye to correct, and the accuracy cannot be guaranteed, which affects the effective working time. It is not conducive to the uniform distribution of the crystallization components of the product

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