Slab continuous casting machine accident emergency device

Abstract

The utility model relates to an accident emergency device of a slab continuous casting machine, which comprises an upper roller frequency converter group, a lower roller frequency converter group, an accident emergency operation box and an accident emergency control cabinet, the output end of the accident emergency control cabinet is connected with the upper roller frequency converter set and the lower roller frequency converter set through ports, the upper roller frequency converter set comprises a plurality of upper roller frequency converters, and the lower roller frequency converter set comprises a plurality of lower roller frequency converters. The utility model has the advantages that the button group in the emergency operation box is respectively connected with the accident emergency relay group, the forward rotation relay group and the reverse rotation relay group in the accident emergency control cabinet; an operator can enable the withdrawal and straightening frequency converter to receive a terminal control mode signal by operating the button group, so that the withdrawal and straightening frequency converter receives a forward rotation starting signal, and the roller withdrawal and straightening frequency converter receives a reverse rotation starting signal; wiring is convenient, time and labor are saved, operation is simple, and popularization is easy.

Description

Technical Field

[0001] The utility model relates to an electrical automation control device for slab continuous casting production, in particular to an accident emergency device for a slab continuous casting machine. Background Art

[0002] See Figure 4 The slab straightening control system of the No. 5 slab caster in a steel plant is connected to the 3-12 upper and lower roller straightening inverters by the PLC system SOMATIC S7-400 through the network Profibus-DP. During the production process of the slab caster, if the template of the PLC system or the network Profibus-DP fails, the slab straightening control system will be shut down. If the control system cannot be restored in time within the specified time, the slab will be frozen in the fan-shaped segment of the continuous casting machine, which will cause great damage to the fan-shaped segment of the production equipment. Summary of the invention

[0003] The utility model aims to provide an accident emergency device for a slab continuous casting machine. If a fault occurs in the template of a PLC system or in the network Profibus-DP, an accident emergency operation box and an accident emergency control cabinet are connected to a tension and straightening inverter to realize rapid start-up of the tension and straightening inverter in the shortest possible time, thereby avoiding the occurrence of slab freezing accidents.

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] An accident emergency device for a slab continuous casting machine comprises an upper roll frequency converter group and a lower roll frequency converter group, and also comprises an accident emergency operation box and an accident emergency control cabinet. The output end of the accident emergency operation box is connected to the input end of the accident emergency control cabinet through a port, and the output end of the accident emergency control cabinet is respectively connected to the upper roll frequency converter group and the lower roll frequency converter group through ports. The upper roll frequency converter group comprises a plurality of upper roll frequency converters, and the lower roll frequency converter group comprises a plurality of lower roll frequency converters.

[0006] The accident emergency operation box comprises a button group and a potentiometer, one end of the button group is connected to the working power supply, and the other ends of the potentiometer and the button group are respectively connected to the output end of the accident emergency operation box through ports.

[0007] The accident emergency control cabinet includes an accident emergency relay group, a forward relay group, and a reverse relay group. One end of the coil of the accident emergency relay group, one end of the coil of the relay of the forward relay group, and one end of the coil of the relay of the reverse relay group are respectively connected to the output end of the accident emergency operation box through ports, and the other end of the coil of the accident emergency relay group, the other end of the coil of the relay of the forward relay group, and the other end of the coil of the relay of the reverse relay group are grounded;

[0008] The normally open contacts of the relays of the accident emergency relay group are connected to the digital input port 1 of the upper roller frequency converter and the lower roller frequency converter respectively, the normally open contacts of the relays of the forward relay group are connected to the digital input port 2 of the upper roller frequency converter and the lower roller frequency converter respectively, and the normally open contacts of the relays of the reverse relay group are connected to the digital input port 3 of the upper roller frequency converter and the lower roller frequency converter respectively.

[0009] The accident emergency control cabinet also includes an accident signal isolation converter, a signal isolator group, and a switching power supply. The switching power supply is used to provide working power. The input end of the accident signal isolation converter is connected to the potentiometer through a port, and the output end of the accident signal isolation converter is respectively connected to the input end of the signal isolator group. The output end of the signal isolator group is used to provide analog given signals to the upper roller frequency converter and the lower roller frequency converter.

[0010] The signal isolator group comprises a plurality of signal isolators, and the input end of each signal isolator is respectively connected to the output end of the fault signal isolation converter.

[0011] The button group includes an accident emergency button, a forward button, and a reverse button. The accident emergency button, the forward button, and the reverse button are respectively connected to the input end of the accident emergency operation box through ports.

[0012] The forward relay group and the reverse relay group each include a plurality of relays connected in parallel.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The button group in the accident emergency operation box is respectively connected to the accident emergency relay group, forward relay group, and reverse relay group in the accident emergency control cabinet. The operator can operate the button group to make the straightening inverter receive the terminal control mode signal, the straightening inverter receive the forward start signal, and the straightening inverter receive the reverse start signal. The wiring is convenient, saving time and effort;

[0015] 2. The potentiometer in the accident emergency operation box is connected to the accident signal isolation converter in the accident emergency control cabinet, the accident signal isolation converter is connected to the signal isolator group, the signal isolator group is connected to the analog input end of the pull-correction inverter, and the operator operates the potentiometer to make the pull-correction inverter receive the speed setting signal. The operation is simple and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the principle of the slab continuous casting machine accident emergency device Figure 1 .

[0017] Figure 2 Schematic diagram of the principle of the slab continuous casting machine accident emergency device Figure 2 .

[0018] Figure 3 This is the terminal wiring diagram of the upper roller inverter and the lower roller inverter.

[0019] Figure 4 It is the network diagram of the upper roller inverter and the lower roller inverter. DETAILED DESCRIPTION

[0020] The present invention is described in detail below in conjunction with the accompanying drawings of the specification, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0021] The following examples are implemented based on the technical solution of the utility model, and provide detailed implementation methods and specific operation processes, but the protection scope of the utility model is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0022] [Example 1]

[0023] See Figure 1 ,See Figure 3 , an accident emergency device for a slab continuous casting machine, comprising an upper roller frequency converter group, a lower roller frequency converter group, an accident emergency operation box, and an accident emergency control cabinet. The accident emergency operation box comprises an accident emergency button SB1, a forward button SB2, a reverse button SB3, a potentiometer, and a power indicator light HL. The accident emergency button SB1 is a reset button. The accident emergency button SB1, the forward button SB2, the reverse button SB3, the potentiometer, and the power indicator light HL are arranged on the door of the accident emergency operation box. One end of the accident emergency button SB1, one end of the forward button SB2, one end of the reverse button SB3, and one end of the power indicator light HL are connected to a working power supply DC24V, and the other end of the accident emergency button SB1, the other end of the forward button SB2, the other end of the reverse button SB3, the other end of the power indicator light HL, and the potentiometer are respectively connected to the output end of the accident emergency operation box through terminal one, terminal two, terminal three, terminal four, and terminal five.

[0024] The accident emergency control cabinet includes accident emergency relays K1~K20 connected in parallel, forward relays KF1, KF2...KF10 connected in parallel, and reversing relays KR1, KR2...KR10 connected in parallel. One end of the coil of the accident emergency relay K1, one end of the coil of the forward relay KF1, and one end of the coil of the reversing relay KR1 are respectively connected to the output end of the accident emergency operation box through terminal one, terminal two, and terminal three. The other ends of the coil of the accident emergency relay K1, the other ends of the coil of the forward relay KF1, and the other ends of the coil of the reversing relay KR1 are grounded, so that the accident emergency button SB1, the forward button SB2, and the reversing button SB3 are respectively connected to the accident emergency relay group, the forward relay group, and the reversing relay group in the accident emergency control cabinet.

[0025] The normally open contacts of the accident emergency relays K1~K20 are respectively connected to the start-allowed port Ext contRol of the upper and lower roller straightening inverters of sections 3~12. If the accident emergency relays K1~K20 are energized, the upper and lower roller straightening inverters of sections 3~12 receive the terminal control mode signal. The normally open contacts of the forward relays KF1, KF2...KF10 are respectively connected to the forward port Fwd of the upper and lower roller straightening inverters of sections 3~12. If the forward relays KF1, KF2...KF10 are energized, the upper and lower roller straightening inverters of sections 3~12 receive the forward start signal. The normally open contacts of the reverse relays KR1, KR2...KR10 are respectively connected to the reverse port Rev of the upper and lower roller straightening inverters of sections 3~12. If the reverse relays KR1, KR2...KR10 are energized, the upper and lower roller straightening inverters of sections 3~12 receive the reverse start signal.

[0026] See Figure 2 ,See Figure 3 The accident emergency control cabinet also includes an accident signal isolation converter, a signal isolator group, and a switching power supply. The switching power supply is used to provide a working power supply DC24V. The input end of the accident signal isolation converter is connected to the potentiometer through a port. The signal isolator group includes 17 signal isolators. The output end 2 of the accident signal isolation converter is respectively connected to the input end of the 1#~17# signal isolators, and the output end 1 of the accident signal isolation converter is connected to the analog input port of the 3-stage upper roller inverter. The output end of the 1#~17# signal isolator is respectively connected to the analog input port of the 4th to 12th sections of the upper roller inverter and the 3rd to 12th sections of the lower roller inverter. The operator rotates the potentiometer to make the 3~12th sections of the upper and lower roller straightening inverters receive the speed setting signal.

[0027] Working process:

[0028] If the template of the PLC system or the network Profibus-DP fails, the accident emergency operation box and the accident emergency control cabinet are connected to the upper and lower roller straightening inverters of sections 3 to 12 through terminals. The accident emergency button SB1 is operated to switch the straightening inverter to the terminal control mode. The forward button SB2 or the reverse button SB3 is operated to make the straightening inverter run forward or reverse. The speed of the straightening inverter is controlled by the potentiometer. After use, SB1 needs to be reset to restore the communication control mode of the straightening inverter.

[0029] The button group in the accident emergency operation box of the utility model is respectively connected with the accident emergency relay group, the forward relay group and the reverse relay group in the accident emergency control cabinet. The operating personnel can operate the button group to make the straightening inverter receive the terminal control mode signal, the straightening inverter receive the forward start signal, and the straightening inverter receive the reverse start signal; the potentiometer in the accident emergency operation box is connected with the accident signal isolation converter in the accident emergency control cabinet, the accident signal isolation converter is connected with the signal isolator group, and the signal isolator group is connected with the analog input end of the straightening inverter. The operating personnel can operate the potentiometer to make the straightening inverter receive the speed setting signal, the wiring is convenient, time and labor saving, simple operation, and easy to promote.

Claims

1. An emergency device for slab continuous casting machine, comprising an upper roll inverter group and a lower roll inverter group, characterized in that: It also includes an accident emergency operation box and an accident emergency control cabinet. The output end of the accident emergency operation box is connected to the input end of the accident emergency control cabinet through a port. The output end of the accident emergency control cabinet is respectively connected to the upper roller inverter group and the lower roller inverter group through ports. The upper roller inverter group includes several upper roller inverters, and the lower roller inverter group includes several lower roller inverters.

2. The slab continuous casting machine accident emergency device according to claim 1, characterized in that: The accident emergency operation box comprises a button group and a potentiometer, one end of the button group is connected to the working power supply, and the other ends of the potentiometer and the button group are respectively connected to the output end of the accident emergency operation box through ports.

3. The slab continuous casting machine accident emergency device according to claim 1, characterized in that: The accident emergency control cabinet comprises an accident emergency relay group, a forward relay group, and a reverse relay group. One end of the coil of the accident emergency relay group, one end of the coil of the relay of the forward relay group, and one end of the coil of the relay of the reverse relay group are respectively connected to the output end of the accident emergency operation box through ports, and the other end of the coil of the accident emergency relay group, the other end of the coil of the relay of the forward relay group, and the other end of the coil of the relay of the reverse relay group are grounded; The normally open contacts of the relays of the accident emergency relay group are connected to the digital input port 1 of the upper roller frequency converter and the lower roller frequency converter respectively, the normally open contacts of the relays of the forward relay group are connected to the digital input port 2 of the upper roller frequency converter and the lower roller frequency converter respectively, and the normally open contacts of the relays of the reverse relay group are connected to the digital input port 3 of the upper roller frequency converter and the lower roller frequency converter respectively.

4. The slab continuous casting machine accident emergency device according to claim 2, characterized in that: The accident emergency control cabinet also includes an accident signal isolation converter, a signal isolator group, and a switching power supply. The switching power supply is used to provide a working power supply. The input end of the accident signal isolation converter is connected to the potentiometer through a port, and the output end of the accident signal isolation converter is respectively connected to the input end of the signal isolator group. The output end of the signal isolator group is used to provide an analog given signal to the upper roller frequency converter and the lower roller frequency converter.

5. The slab continuous casting machine accident emergency device according to claim 4, characterized in that: The signal isolator group comprises a plurality of signal isolators, and the input end of each signal isolator is respectively connected to the output end of the fault signal isolation converter.

6. The slab continuous casting machine accident emergency device according to claim 2, characterized in that: The button group includes an accident emergency button, a forward button, and a reverse button. The accident emergency button, the forward button, and the reverse button are respectively connected to the input end of the accident emergency operation box through ports.

7. The slab continuous casting machine accident emergency device according to claim 3, characterized in that: The forward relay group and the reverse relay group both include a plurality of relays connected in parallel.

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