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Changchun Sanding transformer Co., LTD
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0431-86147611

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Changchun Sanding transformer Co., LTD
0431-86147611
  • Place of shipment Changchun Economic and Technological Development Zone
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  • Mode: Manufacturer, Trader
  • Capital: 50 million RMB
  • Type: Business Unit (Manufacturer, Trader)
  • Main: Domestic leading high-voltage and ultra-high-voltage electrical equipment manufacturers and engineering service providers
  • Area: Changchun City/Economic and Technological Development Zone
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The information on this page is provided by Changchun Sanding Transformer Co., LTD. Ladle refining furnace transformer"Product information, if you want to know more about" Ladle refining furnace transformer "price, model, manufacturer, please contact the manufacturer, or leave a message to the manufacturer.
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Renewal 2020-09-09 09:01

Ladle refining furnace transformer

In recent years, with the increase of cooperation between steel smelting furnace transformers and electric furnace manufacturers in developed countries, the transformers supporting LF furnaces of our company have changed, of which less than 40t LF furnaces still use traditional types, and LF furnaces with transformer structures greater than 40t are mainly typical of Demag and Danilli. Demag company when selecting the transformer requires the transformer outlet mode to be a single entry, the secondary internal sealing triangle type, the side water-cooled pipe triangular type outlet, the cooler is a high water pressure cooler hung on the transformer main engine, and Dennilly requires the transformer outlet mode to be a single entry, the secondary copper bar is staggered before and after, the internal unsealed triangular box cover outlet line, other requirements are basically similar, but for the transformer The integrity. Maintenance-free is consistent, and the loss requirements of the transformer are very strict, so the LF furnace transformer produced by our company has been consistent with the products of international developed countries in performance, and even better than the import level, due to the quantity and specifications of the product production, has formed a series and reference to the user's use, to my company drafted the relevant departments to organize discussions, the formation of the country Home LF furnace transformer standards, the following product details are described as follows:

With the requirements of energy conservation and consumption reduction in the steel industry, as the main equipment used in steel smelting - transformers, in order to match the reduction of power consumption per ton of steel and other factors, our company in the transformer equipment and manufacturing to pursue the following four goals:

1. The transformer itself has good energy-saving characteristics: no-load loss, no-load current, load loss. As far as possible to reduce the percentage of impedance voltage in the common capacity to choose the appropriate, the use of existing high-quality raw materials, the use of small oil gap and other advanced technology, so that the transformer really become energy-saving, the performance level is consistent with the international developed countries.

2 transformer has a very stable reliability, and long service life, the new structure of the product design technology to go through the test of operation and type test verification, design life is not less than 30 years.

3. A certain overload capacity is required to ensure that the user runs properly under the condition of exceeding the capacity and 20% load.

4. Reduce the maintenance workload of the user, so that the user will no longer lift the core in long-term use, and the design is free

The maintenance time is not less than ten years. Free of major repairs for 20 years.

5. Selection of transformer materials, structure and process: the following six parts are introduced

Namely: iron core, winding, body, fuel tank, assembly, accessories. The following are respectively introduced

5.1 Iron core: In terms of materials, we choose 30Q130 silicon steel sheet made by Wisco or 30Z130 silicon steel sheet made by Nippon Steel Co., LTD., which is basically consistent with the materials used in international developed countries.

In the structure of the use of full oblique joint plate type, the upper and lower clamp connection of low magnetic steel plate tensile plate structure, changed the previous square iron structure, so that the iron chip without holes, the core of each section of the magnetic flux density is consistent, no distortion, in the shearing process imported from Germany Georg shear line, The control of shear burr <0.02mm (standard <0.05 is qualified product) per meter length tolerance <0.2mm, thereby increasing the laminating coefficient and reducing the gap between seams, avoiding local overheating of the iron core, reducing product noise and no-load loss and no-load current.

5.2 Winding: From the material, the use of oxygen-free copper electromagnetic wire, control its ρ20℃<0.017241, in addition to control its paper insulation material and tightness, the purpose is to try to make the coil has a better shaft and radial stability, the coil uses small oil gap, internal and external oil shielding plate, guided cooling, cardboard tube structure, so that the compact structure of the load capacity, thermal stability has been improved. Wear and tear has also fallen.

5.3 Body: All the wood parts of the body are changed to laminated wood to improve the rigidity of the lead frame. The upper and lower pressing plates are made of cardboard or epoxy resin forming parts. Compared with the iron pressing plates, the insulation distance of the electrical conductor to the ground is increased, and the size of "window height" can be reduced. The primary and secondary main insulation adopts imported cardboard to increase the strength of the main insulation, and the multi-coil adopts the overall set to improve the reliability of the product. The body is dried by Norwegian vapor phase drying equipment, drying thoroughly and without damaging the insulation, and has the role of washing the body.

5.4 Oil tank: The oil tank adopts folding plate to minimize the weld, increase the strength and make positive and negative pressure test to ensure the reliability of the product seal, and use low magnetic steel plate or magnetic shield in the appropriate part to reduce the magnetic field of the bus wire to produce additional losses on the box wall. This work has achieved very good results in seepage prevention and loss reduction.

5.5 Final assembly: After the body is dry, the winding is relaxed and pressed by hydraulic equipment to achieve good results. Vacuum oil injection is used to reduce the bubbles in the winding, reduce the partial discharge, and increase the life of the product. The use of new anti-aging sealing materials, so that the original leakage problem can be improved.

5.6 Accessories: The main accessories of the water cooler choose tubular or spiral plate oil-water cooler, or dispersed installation, or directly fixed on the transformer host.

The on-load tap-changer is imported from ABB Company, MR Company or Long March Factory. In addition to remote display, remote control interface is also required.

The transformer oil is the naphthenic anti-aging transformer oil produced in Karamay, and the protection of the oil is a fully closed structure (that is, the pressure relief valve with the diaphragm oil storage tank structure).

6 About transformer maintenance

It is necessary for the core to be transported for a long distance after the arrival of the product, mainly to solve the fastener loosening during transportation and the user's acceptance of the manufacturer's products. However, as for the routine overhaul, we believe that it is necessary to check and replace those mechanical wear parts according to the original overhaul cycle. Such as pumps and other moving parts, but the relatively stationary transformer can be long-term without lifting the core, only monitoring the quality changes such as gas chromatography of oil is enough to grasp the situation of the body, so as to save maintenance costs, reduce the core of the body and oil pollution.

7 Product quality assurance measures

7.1 Ensure long-term overload by 20%. If the transformer capacity of LF furnace is 20000kVA, the design reference capacity of the winding should be set to 24000kVA, especially the current density and switch selection, according to 24000kVA selection, the impedance voltage is not more than 8% when it is 24000kVA. With good external characteristics and economy, the thermal load calculation of the transformer is set at 24000kVA, and according to the 24000kVA has a certain margin, select the lead, secondary outlet, cooler and other load-related accessories.

7.2 Anti-impact, anti-short circuit ability of technical measures: our company due to the production of electric furnace transformer for a long time, especially the impact of arc steelmaking furnace, is worse than LF furnace, the main technical measures adopted by our company is to improve the axial and radial stability of the transformer coil, so as to reduce the accumulation of damage to the transformer coil each impact, specific measures: a, select a high voltage level and tightly coated surface treatment of electromagnetic wire. b, the electromagnetic wire is dried after buying, and the insulating paper of the defensive line is wet after winding, which affects the amplitude winding degree of the coil. c, the pad is used after densification to reduce the axial forcing margin of the coil. d, stay strip hair removal treatment to reduce the friction between the stay strip and the pad "dovetail", so that the coil in the axial pressing force transfer resistance is small. e, coil drying using constant pressure drying. f, the inner coil adopts multiple support bars, and the outer coil adopts external stay bars to ensure that the displacement of the wire cake is small when the short circuit impact. g, the body adopts vapor phase drying. h. The body is pressed by hydraulic device.

7.3 Technical measures to ensure no overhaul within 20 years of operation. Our company's products mainly consider the stability and reliability of transformer windings, which has been explained, followed by anti-aging transformer oil and aging seals, transformer oil, we choose Xinjiang Karamay production of naphthenic oil, strong anti-aging ability, coupled with closed structure, diaphragm oil storage tank with pressure release valve, so that oil does not contact with air. Therefore, the oil can be used under normal operation in 20 years, in addition to the anti-aging pad on the main sealing surface of the anti-leakage, it is necessary to do machining treatment, so that the pad and the metal are under pressure on three sides, and the contact with the air is reduced. In addition, the user is required to do an oil chromatographic analysis every 6 months, and store it in the file to distinguish the normal aging of the oil from the fault operation, and ensure that the product used is assured. It is recommended to switch the oil breakdown voltage in the switch frequently according to the number of operations, so that its value should be in line with the switch, and then consider the design of the fasteners using butterfly washers to strengthen the reliability of the lock.

7.4 Appearance features: The design makes the product structure compact, all kinds of transformer control lines access a unified junction box and explain the use, so that it is beautiful in appearance and easy to operate.

Supplier information

Changchun Sanding Transformer Co., Ltd. is a joint-stock enterprise from the old state-owned enterprise established in 1958 - Changchun Transformer Factory, which was restructured according to relevant national policies, and officially changed its name to Changchun Sanding Transformer Co., Ltd. on February 28, 2003. After decades of development, it has cultivated a large number of leading figures in technology and technology in the same industry, a group of outstanding management talents and first-class enterprise team, and has become a modern management model and advanced equipment

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Company name Changchun Sanding transformer Co., LTD Business model Manufacturers, traders
Registered capital 50 million RMB Company registration time The year 1958
Company location Changchun City/Economic and Technological Development Zone Type of enterprise Business units (manufacturers, traders)
Main industry Electrical and electrical communication enterprises
Main product or service Leading domestic high voltage and ultra-high voltage electrical equipment manufacturers and engineering service providers
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Changchun Sanding transformer Co., LTD

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