CN201545874U

CN201545874U - Automatic control device for rocking furnace of oxygen bottom-blowing smelting furnace

Info

Publication number: CN201545874U
Application number: CN2009202599002U
Authority: CN
Inventors: 李初立; 刘武之; 梁念军; 唐冬牛; 周博荣
Original assignee: HUNAN GUIYANG YINXING NONFERROUS SMELTING CO Ltd
Current assignee: HUNAN GUIYANG YINXING NONFERROUS SMELTING CO Ltd
Priority date: 2009-12-26
Filing date: 2009-12-26
Publication date: 2010-08-11
Anticipated expiration: 2019-12-26

Abstract

The utility model relates to an automatic control device for a rocking furnace of an oxygen bottom-blowing smelting furnace, belonging to the technical field of converter control in the metallurgical industry. The automatic control device of the utility model mainly comprises a controller (PLC), a transducer (BF), a direct current inverter (UPS), a storage battery (E) and a charging module (D), wherein an alternate current input end of the charging module (D) is connected with alternate current main circuit phase wires (L1, L2), and the direct current output end is connected with the storage battery (E); the electric power supply of the transducer (BF) is provided by alternate current main circuit phase wires (L1, L2, L3) in one path and the storage battery (E) in another path; the transducer (BF) is connected with a converter motor (M1); and alternate current after direct current inversion of the direct current inverter is transmitted to the alternate current main circuit phase wires (L1, L2, L3) and a control circuit. In the smelting process of the oxygen bottom-blowing smelting furnace, when the power is cut off or failure occurs suddenly, the utility model can rotate a smelting furnace seat from the smelting position to a safe position in time, thereby reducing loss of production caused by sudden accidents.

Description

Oxygen bottom-blowing stove grate automatic control device

Technical field

The utility model belongs to metallurgy industry converter control techniques field, is specifically related to oxygen bottom-blowing stove grate automatic control device.

Background technology

The oxygen bottom-blowing stove is in smelting process; because burst accident; the failure and other reasons or the some other technologic production reason that comprise the unexpected dead electricity of external electrical network, stove seat itself; need timely the metallurgical smelting furnace seat to be forwarded to secure location from smelting the position rocking-turn; so that reduce the influence that burst accident causes production, this just requires the converter inclining device to have perfect protection, controlled function.

The utility model content

Technical problem to be solved in the utility model is; a kind of oxygen bottom-blowing stove grate automatic control device is provided; can be in oxygen bottom-blowing stove unexpected dead electricity or when breaking down in smelting process; timely the smelting furnace seat is forwarded to secure location from smelting the position rocking-turn; reduce the loss that burst accident causes production; has safety, reliability, the perfect characteristic of control defencive function.

The technical scheme that the utility model is dealt with problems is: a kind of oxygen bottom-blowing stove grate automatic control device includes controller, frequency transformer, direct-flow inverter, store battery and charging module; The ac input end of charging module connects the ac main circuit phase line, and dc output end connects store battery; The output terminal of above-mentioned controller is connected to the alternate current operation relay control coil respectively, the DC operation relay control coil, converter is just being changed a job and is being made rly. A control coil, converter counter-rotating working relay control coil and Thrustor electric motor driving working relay control coil; The power supply of above-mentioned frequency transformer has two-way, and one the tunnel is to be provided by the ac main circuit phase line, and another road is that store battery provides; The output terminal of frequency transformer connects the converter motor through emergency stop switch; Alternating-current one tunnel after the described direct-flow inverter inversion is delivered stream master loop phase line, and another road connects controller respectively, exchanges secondary circuits and Thrustor motor current supply circuit; Described ac main circuit phase line also obtains from utility grid line or house generator generating;

Further, above-mentioned charging module D can be designed to two covers, constitutes the using and the reserved.

Further, the utility model scene of can adopting is controlled on the spot, and emergency stop switch QF1 is installed in by the field control case, can disconnect main circuit power at any time, guarantees the security of system.

The utility model can be in oxygen bottom-blowing stove unexpected dead electricity or when breaking down in smelting process, timely the smelting furnace seat is forwarded to secure location from smelting the position rocking-turn, reduce the loss that burst accident causes production, circuit adopts PLC control, frequency transformer drives, automatic switching function with civil power and emergency power supply, emergency power supply have maintenance-free lead-acid battery and engine generator set two-way power supply, the reliability and the security that have improved Controlling System.

Description of drawings

Fig. 1 is primary heat transport system figure of the present utility model;

Fig. 2 is the secondary connection diagram of controller;

Fig. 3 exchanges secondary circuits control principle figure;

Fig. 4 is direct current secondary circuits control principle figure.

In the accompanying drawing: the PLC controller; The BF frequency transformer; The UPS direct-flow inverter; The E store battery; The D charging module; The PLC controller; L1, L2, L3 ac main circuit phase line; A, B, C provide the generating phase line for oneself; The N zero line; 1KA alternate current operation rly.; 2KA DC operation rly.; The 3KA converter is just being changed a job and is being made rly.; 4KA converter counter-rotating working relay; 5KA Thrustor electric motor driving working relay; The 1KM alternating current contactor; The 2KM direct-current contactor; The 3KM alternating current contactor; The QF on-load switch; The QF1 emergency stop switch; The QF2 automatic air-break switch; The QF3 automatic air-break switch; The QF4 automatic air-break switch; The QF5 automatic air-break switch; The QF6 automatic air-break switch; FU1 fusible cut-out, FU2 fusible cut-out, FU3 fusible cut-out; M1 converter motor; M2 Thrustor motor.

Embodiment

Below in conjunction with embodiment shown in the drawings, the utility model is described in further detail:

Accompanying drawing 1 is the system diagram of a kind of oxygen bottom-blowing stove grate automatic control device of expression, includes controller PLC, siemens frequency converter B F, direct-flow inverter UPS, store battery E and charging module D; The ac input end of charging module D connects ac main circuit phase line L1, L2 by automatic air-break switch QF6, and dc output end meets store battery E; The power supply of above-mentioned frequency converter B F has two-way, and one the tunnel is to be provided by alternating current contactor 1KM control by ac main circuit phase line L1, L2, L3, and another road is that store battery E is provided by the control of direct-current contactor 2KM contact; The output terminal of frequency converter B F connects converter motor M 1 through emergency stop switch QF1; The direct current supply of described direct-flow inverter UPS is store battery E, alternating-current one tunnel behind the dc inversion is delivered stream master loop phase line L1, L2, L3 through automatic air-break switch QF2, another road connects controller PLC respectively by automatic air-break switch QF3, automatic air-break switch QF4, automatic air-break switch QF5, exchanges secondary circuits and Thrustor motor M 2 current supply circuits; Described ac main circuit phase line L1, L2, L3 also from the utility grid line or provide generating phase line A for oneself, B, C obtain through on-load switch QF.

Fig. 2 represents it is the secondary connection diagram of controller; Comprise a controller PLC, the power supply of controller PLC is to obtain by the alternating-current of automatic air-break switch QF3 behind the dc inversion.The output terminal of controller PLC is connected to alternate current operation rly. 1KA control coil respectively, DC operation rly. 2KA control coil, converter is just being changed a job and is being made rly. 3KA control coil, and converter counter-rotating working relay 4KA control coil and Thrustor motor M 2 drive working relay 5KA control coil; Controller can also connect man-machine interface.

Fig. 3 represents to exchange secondary circuits control principle figure, it is the branch road that is constituted by alternating current contactor 1KM control coil series connection alternate current operation rly. 1KA normally open contact, the branch road that is constituted with alternating current contactor 3KM control coil series connection Thrustor motor M 2 driving working relay 5KA normally open contacts is formed in parallel, and also is in series with fusible cut-out FU1 in this loop; In order to show the working order of alternating current contactor 1KM, pilot lamp branch road of being controlled by alternate current operation rly. 1KA normally open contact also in parallel on secondary circuits.

Fig. 4 represents direct current secondary circuits control principle figure, and the control secondary circuits of direct-current contactor 2KM is to obtain direct current from store battery E, through fusible cut-out FU2, fusible cut-out FU3, and DC operation rly. 2KA normally open contact, the coil of direct-current contactor 2KM constitutes; In order to show the working order of direct-current contactor 2KM, pilot lamp branch road of being controlled by direct-current contactor 2KM normally open contact also in parallel on secondary circuits.

Claims

1. an oxygen bottom-blowing stove grate automatic control device includes controller (PLC), frequency transformer (BF), direct-flow inverter (UPS), store battery (E) and charging module (D); It is characterized in that: the ac input end of charging module (D) connects ac main circuit phase line (L1, L2), and dc output end connects store battery (E); The output terminal of above-mentioned controller (PLC) is connected to alternate current operation rly. (1KA) control coil respectively, DC operation rly. (2KA) control coil, converter is just being changed a job and is being made rly. (3KA) control coil, and converter counter-rotating working relay (4KA) control coil and Thrustor motor (M2) drive working relay (5KA) control coil; The power supply of above-mentioned frequency transformer (BF) has two-way, and one the tunnel is to be provided by ac main circuit phase line (L1, L2, L 3), and another road is that store battery (E) provides; The output terminal of frequency transformer (BF) connects converter motor (M1) through emergency stop switch (QF1); The direct current supply of described direct-flow inverter (UPS) is store battery (E), alternating-current one tunnel behind the dc inversion is delivered stream master loop phase line (L1, L2, L3), another road connects controller (PLC) respectively, exchanges secondary circuits and Thrustor motor (M2) current supply circuit; Described ac main circuit phase line (L1, L2, L3) also from the utility grid line or provide for oneself the generating phase line (A, B, C) obtain.

2. oxygen bottom-blowing stove grate automatic control device according to claim 1, it is characterized in that: described charging module (D) can be designed to two covers, constitutes the using and the reserved.

3. oxygen bottom-blowing stove grate automatic control device according to claim 1, it is characterized in that: described emergency stop switch (QF1) is installed in by the field control case.