CN201690238U

CN201690238U - Low-voltage reactive compensation device of submerged arc furnace

Info

Publication number: CN201690238U
Application number: CN2010201612820U
Authority: CN
Inventors: 瞿贵荣
Original assignee: Yixing Yulong Electric Furnace Complete Equipment Co Ltd
Current assignee: Yixing Yulong Electric Furnace Complete Equipment Co Ltd
Priority date: 2010-04-15
Filing date: 2010-04-15
Publication date: 2010-12-29
Anticipated expiration: 2020-04-15

Abstract

The utility model discloses a low-voltage reactive compensation device of a submerged arc furnace, which includes a group of compensating capacitor units and a group of compensating reactor units, wherein a partition wall is arranged between the group of compensating capacitor units and the group of compensating reactor units; and the reactor units are used for forming a tuning loop with capacitors, absorbing harmonic waves, limiting switching surge and protecting capacitors. The low-voltage reactive compensation device solve the problems of large current and capacitive-load heating in the ways as follows: a traditional integral fuse is replaced by an isolation switch which is directly connected with a fuse through a bolt, so that a clamp ring of the integral fuse and a conductive part of a fuse body can be protected against virtual-connection arc striking, and avoid gradual damage; and for the purposes of long-term operation and vibration prevention, all large-current circuits are connected through copper bars and bolts after tinning, and locknuts are additionally arranged to ensure the safe running of the large-current circuits. The low-voltage reactive compensation device solves the problem that third or fifth high-content harmonics directly influences and inhibits the service life of the capacitors, and absorbs the third or fifth harmonics to ensure the long-term effective operation of the capacitors.

Description

A kind of ore furnace low-pressure reactive compensation device

Technical field

The utility model relates to voltage of power compensation field, the ore furnace low-pressure reactive compensation device that particularly a kind of security performance is high.

Background technology

The low-voltage reactive compensator capable of the hot stove in ore deposit is owing to the idle local compensation that carries out of the short net of the hot stove in direct ore deposit, and remarkable benefit has obtained using widely in recent years.But owing to the high temperature of the hot stove in ore deposit, physics and the electric circumstance that dust is big, 3 subharmonic content are high, existing low-voltage reactive compensator capable all causes service life very short because of not addressing the above problem well.Therefore, low-voltage compensation apparatus is in line with the objective circumstances of low-voltage, big electric current capacitive load characteristic, solves that long-time running is the difficult problem that the present utmost point must solve under high temperature, dust is big, system's 3 subharmonic content are high environment.

Summary of the invention

Goal of the invention: technical problem to be solved in the utility model is at the deficiencies in the prior art, and a kind of ore furnace low-pressure reactive compensation device is provided.

Technical scheme: the utility model discloses a kind of ore furnace low-pressure reactive compensation device, comprise one group of compensation condenser unit and one group of compensation reactor unit, be provided with divider wall between described compensation condenser unit and the compensation reactor unit;

Described reactor unit is used for forming resonant tank with capacitor, absorbs harmonic wave, and the restriction switching shoves capacitor for voltage protection.

In the utility model, inside, preferably described compensation condenser unit from top to bottom is connected with isolating switch, fuse, contactor and capacitor in turn; Described contactor is connected with capacitor by current circuit; Described fuse and capacitor are connected with described compensation reactor unit respectively; Described fuse is used for capacitor overload and short-circuit protection; Described capacitor is used for compensating power, improves power factor.

In the utility model, described isolating switch is used for maintenance, maintain isolation.Described fuse adopts G level fast acting fuse.Described contactor adopts mechanical self-retaining vacuum contactor, is used for switching on and off of control capacitor.Described isolating switch adopts bolt to be connected with fuse.

Beneficial effect: the utility model solves big electric current, capacitive load heating problem: change traditional integral type fuse into isolating switch and the direct connected mode of fuse bolt, stop that arc is beaten in integral type fuse snap ring and the virtual connection of fuse-link current-carrying part and scaling loss gradually.Long-time running for the benefit of and prevent vibrations, all heavy current circuits adopt zinc-plated copper bar bolt connecting mode, and add stop nut, to guarantee the safe operation of heavy current circuit.3,5 subharmonic that solve high-load suppress the direct influence of capacitor life-span and absorb the long-acting operation of 3,5 subharmonic capacitor for voltage protections.Owing to strengthened reactance Rate (domestic standard is 12%), adapt to the needs that mine heat furnace smelting is often transferred the files more simultaneously.Because need frequent regulation stall when smelting, the pressure drop of reactor and electric current are non-linear relation, the fluctuation of high pressure networking voltage simultaneously is to the influence of low-pressure side etc.In order to guarantee that L-C alignment of tuned circuit frequency can absorb 3 subharmonic all the time, thus GB is brought up to 14% at 12% reactance Rate of 3 subharmonic, to adapt to the production requirement of stove.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is done further to specify, above-mentioned and/or otherwise advantage of the present utility model will become apparent.

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model embodiment schematic diagram.

Embodiment:

As shown in Figure 1, the utility model discloses a kind of ore furnace low-pressure reactive compensation device, comprise one group of compensation condenser unit 1 and one group of compensation reactor unit 2, be provided with divider wall 3 between described compensation condenser unit 1 and the compensation reactor unit 2; Described compensation reactor unit 2 is used for forming resonant tank with capacitor, absorbs harmonic wave, and the restriction switching shoves capacitor for voltage protection.Inside, described compensation condenser unit from top to bottom is connected with isolating switch 4, fuse 5, contactor 6 and capacitor 7 in turn; Described contactor 6 is connected with capacitor 7 by current circuit 8; Described fuse 5 and capacitor 7 are connected with described compensation reactor unit 2 respectively; Described fuse 5 is used for capacitor overload and short-circuit protection; Described capacitor 7 is used for compensating power, improves power factor.Described isolating switch 4 adopts bolt to be connected with fuse 5.

As overlooking shown in the state diagram of Fig. 2, the utility model can be provided with three compensation reactor unit in force, and each unit comprises three reactors of vertical setting, as shown in Figure 1; Compensation condenser unit also corresponding setting has three, connects one to one with three reactors.

The utility model solves the vortes interference that strong alternating magnetic field may form housing: (1) is for preventing eddy current, all metal structures such as compensating cabinet, reactor cabinet, control cubicle etc. have all been done every magnetic treatment, and promptly all metal structures have all adopted NULL in the place of necessity.(2) capacitor adopts aluminium shell, prevents eddy current.

Solve the influence of high ambient temperature, dust: adopt mechanical self-retaining vacuum contactor to electric elements.The operation principle of machinery self-retaining vacuum contactor is: AC220V is inserted its closing coil, and then the major loop closure of vacuum contactor disconnects the control power supply behind the 200ms, and vacuum contactor is realized self-sustaining with its special mechanical structure; As disconnecting vacuum contactor, AC220V is inserted its switching winding 200ms get final product.Owing to adopted mechanical self-retaining vacuum contactor, the operation of bucking-out system is stable more, reliable.Compare with the permanent-magnetic self-retaining vacuum contactor, the excess of stroke of vacuum moving contact is bigger, the contact of dynamic and static contact is more stable, simultaneously because its bigger excess of stroke, only must changing separately when being necessary, its vacuum bubbles gets final product, and needn't the integral replacing vacuum contactor, reduced the maintenance cost of equipment.Reactor and compensating cabinet are arranged apart, reduce because of the influence of reactor heating to compensating cabinet, and each functional compartments is provided with independent ventiduct, temperature detection, function such as blower fan cooling, blower fan are standby.

During the utility model is implemented; the building-out capacitor cabinet adopts following particular structure mode: isolating switch separates selection, bolt connecting mode with fuse; stop generally to adopt the supporting selection of fuse and fuse base, snap ring to be connected the scaling loss that causes; this mode is separated buffer action and the protective effect of fuse with the supporting selection mode of fuse base; guarantee that fuse is under the prerequisite that plays a protective role; isolating switch is amplifying parameters separately; playing under the prerequisite of buffer action, stop the phenomenon of generating heat.The mechanical type self-sustaining vacuum contactor that employing is specifically applied to hot ring border, ore deposit comes the input and the excision of control capacitor.Compare advantage with the special-purpose contactor of general employing capacitor with anti-on-the-spot dust; Compare with general employing magneto self-sustaining vacuum contactor, have the advantage that switching is stable more, maintenance cost is lower.

Simultaneously, the reactor group adopts 14% reactance Rate, because becoming low-pressure side, the hot stove stove in ore deposit when smelting, needs continuous regulation stall, voltage constantly changes, cause capacitor voltage at both ends and running current also changing, and the electric current of reactor and voltage are non-linear relation, its electric current equals the electric current of capacitor, for the ratio that guarantees its voltage and the voltage of capacitor greater than 12%, to guarantee to absorb 3 subharmonic.

In addition, reactor and compensating cabinet are arranged apart, reduce because of the influence of reactor heating to compensating cabinet, and each functional compartments is provided with independent ventiduct, temperature detection, function such as blower fan cooling, blower fan are standby.

The utility model provides a kind of thinking and method of ore furnace low-pressure reactive compensation device; the method and the approach of this technical scheme of specific implementation are a lot; the above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.The all available prior art of each part not clear and definite in the present embodiment is realized.

Claims

1. an ore furnace low-pressure reactive compensation device is characterized in that, comprises one group of compensation condenser unit (1) and one group of compensation reactor unit (2), is provided with divider wall (3) between described compensation condenser unit (1) and compensation reactor unit (2);

Described compensation reactor unit (2) is used for forming resonant tank with capacitor, absorbs harmonic wave, and the restriction switching shoves capacitor for voltage protection.

2. ore furnace low-pressure reactive compensation device according to claim 1 is characterized in that, inside, described compensation condenser unit from top to bottom is connected with isolating switch (4), fuse (5), contactor (6) and capacitor (7) in turn; Described contactor (6) is connected with capacitor (7) by current circuit (8); Described fuse (5) and capacitor (7) are connected with described compensation reactor unit (2) respectively; Described fuse (5) is used for capacitor overload and short-circuit protection; Described capacitor (7) is used for compensating power, improves power factor.

3. ore furnace low-pressure reactive compensation device according to claim 1 is characterized in that, described isolating switch (4) adopts bolt to be connected with fuse (5).