Electrical control system for converter feeding

Abstract

The utility model discloses an electrical control system for converter feeding. The system comprises a PLC switch, a frequency conversion switch, an auxiliary material switch and an alloy switch. The optical fiber ports of the switches are connected in series through optical fibers to form a looped network; the PLC switch is connected with a control PLC (Programmable Logic Controller); the frequency conversion switch is connected with an auxiliary material frequency converter and / or an alloy frequency converter; the alloy switch is connected with an alloy operation box; the auxiliary material switch is connected with an auxiliary material operation box; wherein a GE bus module is arranged in the auxiliary material operation box and / or the alloy operation box, and the auxiliary material operation box and / or the alloy operation box are / is in communication connection with the control PLC through the GE bus module. According to the utility model, the converter control system is upgraded from the traditional hard wire communication to the network communication, so that the PLC exchanges data with the frequency converter and the operation box through the Ethernet communication protocol, and the management switch is used to form a looped network, thereby ensuring the stability and reliability of the communication.

Description

Technical Field

[0001] The utility model relates to an electrical control system, in particular to an electrical control system for converter charging, which can realize full network communication control of the converter charging system, reduce the amount of cable hard wire laying, reduce fault points, and monitor and diagnose the status of frequency conversion equipment in real time. Background Art

[0002] Converter production is a key steelmaking process in steel mills. During the smelting process, auxiliary materials such as limestone, lime, or fluorite are added to create a highly reactive and appropriately sized slag. Coolants such as scale, iron ore, and sintered ore are also added to control the temperature of the molten steel. After smelting, alloy materials such as ferromanganese and ferrosilicon are added to the ladle to remove oxygen from the molten steel. Auxiliary materials and alloys are stored in silos and discharged through feeders and gates below the silos. In traditional electrical control systems, feeders are controlled via hard-wired circuits, and connections between the PLC, operating box, and electrical cabinet are all made via hard-wired cables. This approach has drawbacks such as large cabling requirements, high costs, and numerous failure points. Utility Model Content

[0003] In order to overcome the above-mentioned defects, the purpose of the present utility model is to provide an electrical control system for converter charging.

[0004] To achieve the above-mentioned purpose, the electrical control system for converter charging of the present invention comprises: a PLC switch, a frequency conversion switch, an auxiliary material switch, and an alloy switch; the optical fiber ports of each switch are connected in series to form a ring network;

[0005] A control PLC is connected to the PLC switch;

[0006] The frequency converter is connected to the auxiliary material frequency converter and / or alloy frequency converter;

[0007] An alloy operation box is connected to the alloy switch;

[0008] The auxiliary material switch is connected to an auxiliary material operation box;

[0009] Wherein, the auxiliary material operation box and / or alloy operation box are provided with a GE bus module, and the auxiliary material operation box and / or alloy operation box are provided with a GE bus module.

[0010] Or the alloy operation box is connected to the control PLC through the GE module.

[0011] Furthermore, the control PLC includes a Siemens 1500 CPU and an IO slave module.

[0012] Furthermore, the auxiliary material frequency converter and / or alloy frequency converter is a Siemens G120C frequency converter.

[0013] Furthermore, the ring network uses the MRP protocol, the PLC switch is the ring manager, and the frequency conversion switch, auxiliary material switch, and alloy switch are ring switches.

[0014] Furthermore, the auxiliary material frequency converter is used to control the high-level auxiliary material bin feeder.

[0015] Furthermore, the alloy frequency converter is used to control the alloy silo feeder.

[0016] Furthermore, the Siemens 1500 CPU exchanges data with the Siemens G120C inverter and the bus IO module respectively through the industrial Ethernet communication protocol.

[0017] After adopting the above structure, the control PLC and the on-site operation box use industrial Ethernet to communicate, which can directly obtain the button operation signal on the operation box, and can also directly control the output of the indicator light on the operation box. The hard-wired cable from the operation box to the PLC is replaced by an optical fiber. The control PLC and the Siemens G120C inverter use standard message communication control, which is extremely reliable and convenient, and is convenient for equipment expansion. At the same time, the hard-wired cable between the two is removed, and several hard-wired cables are replaced by network cables or optical fibers, which reduces the construction investment cost of the converter. Four two-layer managed switches form a ring network, and the system has strong stability. The utility model upgrades the converter control system from traditional hard-wired communication to network communication, so that data is exchanged between the PLC and the inverter and the operation box through the Ethernet communication protocol, and a management switch is used to form a ring network to ensure stable and reliable communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the converter charging electrical control system of the present utility model. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0020] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0023] Example 1:

[0024] like Figure 1 The converter charging control system shown includes a control PLC, auxiliary material inverters 1-10, alloy inverters 1-8, auxiliary material operation boxes 1-10, alloy operation boxes 1-8, a PLC switch, a frequency conversion switch, auxiliary material switch, and an alloy switch. The control PLC includes a Siemens 1500 CPU and an IO slave module. The auxiliary material inverters 1-10 and alloy inverters 1-8 are Siemens G120C inverters. The auxiliary material operation boxes 1-10 and alloy operation boxes 1-8 include bus IO modules. The PLC switch, frequency conversion switch, auxiliary material switch, and alloy switch are four Layer 2 managed switches. The control PLC is connected to the PLC switch; the auxiliary material inverters 1-10 and alloy inverters 1-8 are connected to the frequency conversion switch; the auxiliary material operation boxes 1-10 are connected to the auxiliary material switch; and the alloy operation boxes 1-8 are connected to the alloy switch.

[0025] The auxiliary material operation box and alloy operation box are provided with necessary control switches, buttons and indicator lights; after the control switches and buttons are operated, they are output to the control PLC through the corresponding GE module and ring network as input signals. After the control PLC responds to the input, it outputs it to the corresponding indicator light through the ring network and the corresponding GE module.

[0026] The control PLC includes a 1500CPU model of 1516PN / DP, an IO slave module of Siemens ET200 MP module, including digital input and output modules and analog input and output modules. The control PLC and PLC switch are installed in the control cabinet of the PLC room.

[0027] The auxiliary material frequency converters 1 to 10, alloy frequency converters 1 to 8, and frequency converter switches are installed in various electrical cabinets in the low-voltage power distribution room, and the frequency converter switches are star-connected to the 18 frequency converters via network cables.

[0028] The auxiliary material operation boxes 1-10 are installed next to the high-level auxiliary material silo feeders to control the corresponding auxiliary material variable frequency feeders. Each operation box is equipped with a GE bus module to collect the input and output indicators of the operation components of the operation box. The auxiliary material switch is installed in one of the auxiliary material operation boxes and is connected to the GE bus modules in each auxiliary material operation box via network cables in a star configuration.

[0029] Alloy operation boxes 1-8 are installed next to the center alloy silo feeder to control the corresponding alloy material variable frequency feeder. Each operation box is equipped with a GE bus module to collect the operation input and indicator light output of the operation box. The alloy switch is installed in one of the alloy operation boxes and connected to the GE bus modules in each alloy operation box via network cables in a star configuration.

[0030] The PLC switch, frequency conversion switch, auxiliary material switch, and alloy switch are four Hertzmann managed switches, with optical fiber ports connected in series to form a ring network, in which the PLC switch is set as the master and the other three are set as slaves.

[0031] During the converter smelting process, the control PLC communicates with a Siemens G120C inverter via standard 352 messages, controlling the start and stop of the variable frequency feeder, setting the speed, and monitoring its feedback status. The control PLC communicates via Industrial Ethernet using the loaded GE bus module GSD file, directly reading and writing I / O points on the bus module and diagnosing the bus module's connection status.

[0032] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiments. Various modifications can be made within the scope of knowledge of those skilled in the art without departing from the spirit of the present invention. Many other changes and modifications that do not depart from the concept and scope of the present invention should be considered within the scope of protection of the present invention.

[0033] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0034] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An electrical control system for converter charging, characterized by: The system includes: a PLC switch, a frequency conversion switch, an auxiliary material switch, and an alloy switch; the optical fiber ports of each switch are connected in series through optical fibers to form a ring network; A control PLC is connected to the PLC switch; The frequency converter is connected to the auxiliary material frequency converter and / or alloy frequency converter; An alloy operation box is connected to the alloy switch; The auxiliary material switch is connected to an auxiliary material operation box; Wherein, the auxiliary material operation box and / or the alloy operation box is provided with a GE bus module, and the auxiliary material operation box and / or the alloy operation box is communicatively connected with the control PLC via the GE module.

2. The electrical control system for converter charging according to claim 1, characterized in that: The control PLC includes a Siemens 1500 CPU and an IO slave module.

3. The electrical control system for converter charging according to claim 1, characterized in that: The auxiliary material frequency converter and / or alloy frequency converter is a Siemens G120C frequency converter.

4. The electrical control system for converter charging according to claim 1, characterized in that: The ring network uses the MRP protocol, the PLC switch is the ring manager, and the frequency conversion switch, auxiliary material switch, and alloy switch are ring switches.

5. The electrical control system for converter charging according to claim 1, characterized in that: The auxiliary material frequency converter is used to control the high-level auxiliary material bin feeder.

6. The electrical control system for converter charging according to claim 1, characterized in that: The alloy frequency converter is used for controlling the alloy silo feeder.

7. The electrical control system for converter charging according to claim 1, characterized in that: The Siemens 1500 CPU exchanges data with the Siemens G120C inverter and the bus IO module respectively through the industrial Ethernet communication protocol.

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