CN207705016U - A kind of winding and pin configuration that can increase ore heat furnace transformer and smelt range - Google Patents

Abstract

The utility model discloses a winding and lead structure capable of increasing the smelting range of a submerged arc furnace transformer. The fine-tuning winding, coarse-tuning winding, and basic winding constitute a high-voltage winding unit, wherein the end of the coarse-tuning winding is connected to the end of the basic winding and drawn out, and the lead-out end is simultaneously connected to the wire end of the coarse-tuning winding and the wire end of the fine-tuning winding to the On the no-load voltage regulating switch tap of the middle part of the voltage regulation, the connection between the fine-tuning winding line end and the coarse-tuning winding line end or the end is switched through the no-load voltage regulating switch, so that the basic winding is connected to or cut off the coarse-tuning winding, thereby changing The number of effective turns of the high-voltage winding, and through the adjustment of the fine-tuning winding, can obtain two different ranges of secondary output voltage combinations. This winding structure and lead way can meet the voltage requirements of two different smelting products, thereby reducing the investment cost and risk of users.

Description

A winding and lead wire structure capable of increasing the smelting range of submerged arc furnace transformers

technical field

The utility model relates to a submerged arc furnace transformer, in particular to a winding and lead structure capable of increasing the smelting range of the submerged arc furnace transformer.

Background technique

In the smelting industry, different voltage parameters are selected for the secondary output of the submerged arc furnace transformer for different smelting varieties. In the prior art, the secondary output voltage of the submerged arc furnace transformer is designed for a certain fixed product. It is determined that the smelting variety is single. Correspondingly, the traditional submerged arc furnace transformer winding structure includes: high-voltage winding and low-voltage winding, wherein the high-voltage winding includes two parts: basic winding and voltage regulating winding.

In addition, for the same submerged arc furnace transformer, there are two methods commonly used in the prior art to change the smelting voltage: one is to use Y connection and D connection for the connection groups of the high voltage side winding, and at this time the secondary side can output 100% and 57% two voltage combinations, and the other is that the secondary outlets are respectively connected in series and parallel. In this way, the secondary side can output two voltage combinations of 100% and 50%. In the above two methods, since the output voltage of the secondary side is fixed, there is a problem that the voltage required for smelting another product cannot be exactly met.

Utility model content

Aiming at the problems involved in the background technology, the utility model provides a winding and lead wire structure that can increase the smelting range of the submerged arc furnace transformer, which can solve the deficiencies in the prior art and realize two different voltage combinations output by the secondary terminal of the transformer , to meet the needs of smelting different products.

The technical solution of the utility model is: a winding and lead wire structure that can increase the smelting range of the submerged arc furnace transformer, including a fine-tuning winding, a coarse-tuning winding, a basic winding, The low-voltage winding, the fine-tuning winding, the coarse-tuning winding, and the basic winding constitute a high-voltage winding unit, wherein the end of the coarse-tuning winding is connected to the end of the basic winding and drawn out, and the lead-out end passes through the wire end of the coarse-tuning winding and the wire end of the fine-tuning winding at the same time The lead wire is connected to the tap of a no-load voltage regulating switch in the middle of the voltage regulation, and the connection between the fine-tuning winding wire end and the coarse-tuning winding wire end or the end is switched through the no-load voltage regulating switch, so that the basic winding is connected to or cut off from the coarse-tuning winding , so as to change the effective number of turns of the high-voltage winding, and through the adjustment of the fine-tuning winding, two different ranges of secondary output voltage combinations can be obtained.

The beneficial effects of the utility model are: compared with the traditional submerged arc furnace transformer winding structure, since the coarse adjustment winding is added in the high-voltage winding, the number of turns of the coarse adjustment winding can be adjusted according to the needs of smelting products, and access Cut off the coarse adjustment winding, so that the secondary terminal of the transformer can output two different ranges of voltage combinations. At the same time, since the coarse adjustment winding is set between the voltage regulation winding and the basic winding, it does not affect the main magnetic leakage channel between the high and low voltage windings. It has little effect on the impedance voltage of the transformer, so this winding structure and lead wire method can meet the voltage requirements of two different smelting products, thereby reducing the investment cost and risk of the user.

Description of drawings

Fig. 1 is the utility model winding arrangement structural diagram;

Fig. 2 is a schematic diagram of the wiring of the high-voltage winding of the utility model;

Fig. 3 is the high-voltage lead wire diagram of the utility model.

Among them: 1: fine-tuning winding; 2: coarse-tuning winding; 3: basic winding; 4: low-voltage winding; 5: iron core; 6: no-load voltage regulating switch; T: Coarse-tuning winding wire end; L: Fine-tuning winding wire end; O: Common lead-out terminal connecting the basic winding and the coarse-tuning winding end.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail.

See Figure 1: A winding and lead wire structure that can increase the smelting range of a submerged arc furnace transformer, including a fine-tuning winding 1, a coarse-tuning winding 2, a basic winding 3, and The low-voltage winding 4, the fine-tuning winding 1, the coarse-tuning winding 2, and the basic winding 3 form a high-voltage winding unit.

Refer to Fig. 2 and Fig. 3: the end of the coarse adjustment winding 2 is connected to the end of the basic winding 3 to the common lead-out O, and the common lead-out O passes through the wire end T of the coarse adjustment winding 2 and the wire end L of the fine adjustment winding 1 at the same time The lead wires are correspondingly connected to a box-top unloaded tap switch 6 tap for voltage regulation in the middle, and the fine-tuning winding 1 terminal L and the coarse-tuning winding 2 terminal T or terminal O are realized by switching the no-load tap switch 6 Connection, so that the basic winding 3 is connected to or cut off the coarse adjustment winding 2, thereby changing the effective number of turns of the high voltage winding.

See Figure 3: The no-load voltage regulating switch 6 adopts the middle part voltage regulating box-top type, and its tap × tap number is 4×3, and the common terminal O connected to the end of the coarse adjustment winding 2 and the end of the basic winding 3 is connected to the no-load The first tap of the voltage regulating switch 6, the wire terminal T of the coarse adjustment winding 2 is connected to the third tap of the no-load voltage regulating switch 6, in order to ensure the safety of the high voltage winding, the wire end L of the fine adjustment winding 1 is respectively connected to the no-load Load the second and fourth taps of the voltage regulating switch 6, so that the high-voltage winding cuts off the coarse adjustment winding 2 at 1 tap, and accesses the coarse adjustment winding 2 at 2 and 3 taps. Terminals A, B, and C of the three-phase high-voltage basic winding are connected to the power grid through lead wires and bushings.

Claims (2)

1. a kind of winding and pin configuration that can increase ore heat furnace transformer and smelt range, it is characterised in that：Including from inside to outside It is successively set on ore heat furnace transformer iron core（5）The fine tuning winding in outside（1）, coarse adjustment winding（2）, basic winding（3）, low pressure around Group（4）, the coarse adjustment winding（2）End and basic winding（3）End is connected in public exit O, and the public exit O is same When with coarse adjustment winding（2）Line end T and fine tuning winding（1）Line end L corresponded to by lead be connected to the case top formula of a middle part voltage regulating without Voltage adjustment of on-load switchs（6）On tap.

2. the winding and pin configuration according to claim 1 that can increase ore heat furnace transformer and smelt range, feature exist In：Unloaded tap changer（6）Using middle part voltage regulating case top formula, tap × number of taps is 4 × 3, basic winding ends with it is thick The public exit O for adjusting winding ends connected is connected to unloaded tap changer（6）The first tap, coarse adjustment winding（2）Line end T connects To unloaded tap changer（6）Third tap, fine tuning winding（1）Line end L, be respectively connected to unloaded tap changer（6） Two and the 4th taps.