Control device of submerged arc furnace electrode pressure releasing system

Abstract

The control device of the submerged arc furnace electrode pressure releasing system comprises the electrode pressure releasing system, the electrode pressure releasing system comprises an upper band-type brake and a lower band-type brake, the surface of the lower band-type brake is provided with two oil cylinder telescopic rods, the oil cylinder telescopic rods are arranged on the two sides of the electrode pressure releasing system, and the upper band-type brake and the lower band-type brake are arranged on the two sides of the electrode pressure releasing system. The upper end of the oil cylinder telescopic rod is connected with an oil cylinder, a first oil inlet pipe and a second oil inlet pipe are fixedly installed on the side wall of the oil cylinder, and a steel beam is fixedly installed on the upper end face of the oil cylinder. Displacement sensors are installed on the oil cylinders on the two sides respectively, the displacement sensors are electrically connected with a PLC, and a network cable port of the PLC is connected with a network cable port of an upper computer through a network cable. And a bus interface of the PLC is connected with an alarm. The device has the advantages of being reasonable in structural design, easy and convenient to operate, accurate in data collection, safe and reliable to use and capable of fully guaranteeing safe operation of the submerged arc furnace electrode pressure release system.

Description

Technical Field

[0001] The invention relates to the technical field of ferroalloy production equipment control devices, in particular to a control device for an electrode pressing and releasing system of an ore-fired furnace. Background Art

[0002] Submerged arc furnace is an industrial electric furnace, which is mainly used for the production of important industrial raw materials and chemical raw materials such as calcium carbide in the metallurgical industry, such as ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, manganese ore alloy and other ferroalloys; the industrial silicon furnace uses semi-graphite carbon electrodes. Since the carbon electrodes are continuously consumed during the smelting process, it is necessary to perform electrode pressing and releasing operations so that the consumed part of the carbon electrodes can be replenished in time, thereby ensuring that the length of the working end of the electrode buried in the charge meets the furnace operation process requirements.

[0003] The technology currently used in the electrode pressure release system of the electric arc furnace is basically to add a single-sided ranging displacement sensor at the position of the electrode pressure release cylinder, mainly to meet the data measurement of the electrode displacement action, but the single-sided data measurement cannot ensure the synchronization and consistency of the pressure release cylinder actions on both sides. Once the pressure release cylinders on both sides are not in sync, problems such as electrode pressure release deviation are likely to occur; on the other hand, if the monitored displacement data is not protected by corresponding interlocking settings, it is easy to cause the displacement to exceed the limit action and cause damage to the furnace top equipment, affecting the stable operation of the electric arc furnace equipment. Utility Model Content

[0004] The utility model aims to provide a control device for an electrode pressing and releasing system of an ore-heating furnace, which has reasonable structural design, simple operation, accurate data collection, safe and reliable use, and can fully ensure the safe operation of the electrode pressing and releasing system of the ore-heating furnace.

[0005] The utility model discloses a control device for an electrode pressing and releasing system of an electric arc furnace, comprising an electrode pressing and releasing system, wherein the electrode pressing and releasing system comprises an upper brake and a lower brake, a surface of the lower brake is provided with an oil cylinder telescopic rod, the number of the oil cylinder telescopic rods is two, the oil cylinder telescopic rods are arranged at two sides of the electrode pressing and releasing system, the upper ends of the oil cylinder telescopic rods are connected with an oil cylinder, a first oil inlet pipe and a second oil inlet pipe are fixedly installed on the side wall of the oil cylinder, and a steel beam is fixedly installed on the upper end surface of the oil cylinder; displacement sensors are respectively installed on the oil cylinders on both sides, the displacement sensors are electrically connected with a PLC controller, and a network cable port of the PLC controller is connected with a network cable port of a host computer through a network cable.

[0006] The bus interface of the PLC controller is connected with a comparison module.

[0007] Displacement sensors are installed on the oil cylinders on both sides. The displacement distance of the displacement on both sides of the oil cylinder can be measured in real time during the electrode pressing and pulling process through the measurement and encoding functions inside the displacement sensors, and then the signals collected by the two displacement sensors are converted and encoded. At the same time, the signals collected during the pressing and pulling process of the electrode pressing and pulling system can be transmitted in the form of analog quantity to the four-bit AI Turck analog quantity acquisition module on site, and then the analog quantity signal is transmitted to the background main PLC controller through the PROFIBUS bus protocol. After data processing by the main station CPU and related conversion modules, the specific address is given in the form of digital quantity, and then connected to the HMI interface of the host computer WINCC operating system in the central control room through the local area network, realizing the human-machine exchange mode of electrode pressing and pulling operation and data monitoring.

[0008] The comparison module is set up to collect the release displacement data in the PLC controller. According to the release stroke of the release cylinder of 0-1200mm, a comparison instruction program is set in the program for the upward displacement not exceeding 200mm and the lowering displacement not exceeding 800mm. When the actual displacement is between 200mm-800mm, the three-phase electrode displacement can be arbitrarily operated in three places.

[0009] The bus interface of the PLC controller is connected with an alarm.

[0010] The alarm is set. When the upward or downward displacement of the oil cylinder in the electrode pressing system exceeds the limit, that is, the displacement is less than 200mm or greater than 800mm, the three-phase electrode will automatically trigger the upper and lower limit alarm instructions respectively, and promptly remind the operators on duty to prevent the occurrence of problems caused by excessive displacement operations.

[0011] The bus interface of the PLC controller is connected to a side operation authority module.

[0012] The bus interface of the PLC controller is connected with a remote button authority operation module.

[0013] The bus interface of the PLC controller is connected to a host computer HMI operation authority module.

[0014] The machine-side operation permission module, remote button permission operation module, and upper computer HMI operation permission module are set up to select relevant instructions through the selection switch to ensure that operations in three locations can only be allowed at one location at the same time, prevent equipment failures caused by misoperation, and ensure safe and reliable operations, fully ensuring the safety of operators.

[0015] The oil cylinder telescopic rod is fixedly mounted on the surface of the lower brake by means of bolts.

[0016] The telescopic rod of the oil cylinder is fixed to the surface of the lower brake by bolts, which is convenient for installation and disassembly, saving time and effort.

[0017] The beneficial effects of the utility model are:

[0018] 1) Displacement sensors are installed on the oil cylinders on both sides. The displacement distance of the oil cylinders on both sides can be measured in real time during the electrode pressing and unloading process through the measurement and encoding functions inside the displacement sensors. The signals collected by the two displacement sensors are then converted and encoded. At the same time, the signals collected during the electrode pressing and unloading process can be transmitted in the form of analog quantities to the four-bit AI Turck analog quantity acquisition module on site, and then the analog signals are transmitted to the background master PLC controller through the PROFIBUS bus protocol. After data processing by the master station CPU and related conversion modules The specific address is given in the form of digital quantity, and then connected to the HMI interface of the upper computer WINCC operating system in the central control room through the local area network to realize the human-machine exchange mode of electrode pressing and releasing operation and data monitoring; the comparison module is set up, and the lifting displacement does not exceed 200mm and the lowering displacement does not exceed 800mm is set in the program according to the pressing and releasing stroke of the pressing and releasing cylinder 0-1200mm. When the actual displacement is between 200mm-800mm, the three-phase electrode displacement can be arbitrarily operated in three places, which is convenient to operate and safe and reliable to run.

[0019] 2) The machine-side operation permission module, remote button permission operation module, and upper computer HMI operation permission module are set up to select relevant instructions through the selection switch to ensure that the three-location operation can only be allowed at one place at the same time, prevent equipment failure caused by misoperation, and ensure safe and reliable operation, fully ensuring the safety of operators.

[0020] 3) When the oil cylinder in the electrode pressure release system exceeds the limit of lifting or lowering, that is, the displacement is less than 200mm or greater than 800mm, the three-phase electrode will automatically trigger the upper and lower limit alarm instructions respectively, and promptly remind the operators to prevent the occurrence of problems caused by excessive displacement operation.

[0021] 4) The device has a reasonable structural design, low processing and manufacturing cost, safe and reliable operation, and saves time and effort. It has been put into use with good results and is worthy of large-scale promotion and application. The device realizes the background remote human-machine exchange operation and monitoring function of the pressure release cylinder displacement during the pressure release process of the electrode pressure release system; the upper and lower limits of the cylinder movement displacement are controlled during the pressure release displacement action, which solves the problem of damage to the furnace top water cooling cable, hose, cylinder and other equipment caused by intentional or unintentional over-limit operation during the operation of the post personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the connection structure of the PLC controller in the utility model.

[0024] In the figure: steel beam 1, first oil inlet pipe 2, oil cylinder 3, displacement sensor 4, second oil inlet pipe 5, oil cylinder telescopic rod 6, lower brake 7, bolt 8, switch 9, host computer 10, PLC controller 11, alarm 1101, comparison module 1102, machine-side operation authority module 1103, remote button authority operation module 1104, host computer HMI operation authority module 1105, electrode pressing and releasing system 12. DETAILED DESCRIPTION

[0025] Example 1.

[0026] The following will be combined with the attached Figure 1 , 2 The utility model is further described.

[0027] The utility model includes a steel beam 1, a first oil inlet pipe 2, an oil cylinder 3, a displacement sensor 4, a second oil inlet pipe 5, an oil cylinder telescopic rod 6, a lower brake 7, a bolt 8, a switch 9, a host computer 10, a PLC controller 11, an alarm 1101, a comparison module 1102, a machine-side operation authority module 1103, a remote button authority operation module 1104, a host computer HMI operation authority module 1105, and an electrode pressing and releasing system 12. The specific structure includes an electrode pressing and releasing system 12, and the electrode pressing and releasing system 12 includes an upper brake 1201 and a lower brake 1202. 2. The surface of the lower brake 1202 is provided with a cylinder telescopic rod 6. There are two cylinder telescopic rods 6. The cylinder telescopic rods 6 are arranged on both sides of the electrode pressing and releasing system 12. The upper ends of the cylinder telescopic rods 6 are connected to the cylinder 3. The side walls of the cylinder 3 are fixedly installed with the first oil inlet pipe 2 and the second oil inlet pipe 5. The upper end surface of the cylinder 3 is fixedly installed with a steel beam 1. Displacement sensors 4 are respectively installed on the cylinders 3 on both sides. The displacement sensors 4 are electrically connected to the PLC controller 11. The network cable port of the PLC controller 11 is connected to the network cable port of the host computer 10 through a network cable.

[0028] The bus interface of the PLC controller 11 is connected to a comparison module 1102 .

[0029] The bus interface of the PLC controller 11 is connected to an alarm 1101 .

[0030] The model of the PLC controller 11 is Siemens 400 series PLC module, specifically 407-0KA02-0AA0 and 412-2XJ05-0AB0; the model of the displacement sensor 4 is BL300-MA; the model of the alarm 1101 is BG5-2A; the model of the electrode pressure release system 12 is: 27000KVA.

[0031] Instructions for use: The displacement sensors 4 installed on the oil cylinders 3 on both sides can measure the displacement distance of the oil cylinders 3 on both sides in real time during the electrode pressing and unloading system 12 pressing and unloading process through the measurement and encoding functions inside the displacement sensors 4, and then perform data conversion and encoding processing on the signals collected by the two displacement sensors 4; at the same time, the signals collected during the pressing and unloading process of the electrode pressing and unloading system 12 can be transmitted in the form of analog quantities to the four-bit AI Turck analog quantity acquisition module on site, and then the analog quantity signals are transmitted to the background main PLC controller 11 through the PROFIBUS bus protocol, and after data processing by the main station CPU and related conversion modules, a specific address is given in the form of digital quantities, and then connected to the host computer 10 of the control room through the local area network. WINCC operating system On the HMI interface, the human-machine exchange mode of electrode pressing and releasing operation and data monitoring is realized; the comparison module 1102 is set up, and for the collected pressing and releasing displacement data in the PLC controller 11, according to the pressing and releasing stroke of the pressing and releasing cylinder 0-1200mm, a comparison instruction program is set in the program, that is, the lifting displacement does not exceed 200mm, and the lowering displacement does not exceed 800mm. When the actual displacement is between 200mm-800mm, the three-phase electrode displacement can be arbitrarily operated in three places; when the lifting or lowering displacement of the oil cylinder 3 in the electrode pressing and releasing system 12 exceeds the limit, that is, the displacement is less than 200mm or greater than 800mm, the three-phase electrode automatically triggers the upper and lower limit alarm instructions respectively, and the alarm 1101 sounds, prompting the post operator in time to prevent other problems caused by the displacement exceeding the limit operation.

[0032] Example 2.

[0033] The following will be combined with the attached Figure 1 , 2 The utility model is further described.

[0034] The utility model includes a steel beam 1, a first oil inlet pipe 2, an oil cylinder 3, a displacement sensor 4, a second oil inlet pipe 5, an oil cylinder telescopic rod 6, a lower brake 7, a bolt 8, a switch 9, a host computer 10, a PLC controller 11, an alarm 1101, a comparison module 1102, a machine-side operation authority module 1103, a remote button authority operation module 1104, a host computer HMI operation authority module 1105, and an electrode pressing and releasing system 12. The specific structure includes an electrode pressing and releasing system 12, and the electrode pressing and releasing system 12 includes an upper brake 1201 and a lower brake 1202. 2. The surface of the lower brake 1202 is provided with a cylinder telescopic rod 6. There are two cylinder telescopic rods 6. The cylinder telescopic rods 6 are arranged on both sides of the electrode pressing and releasing system 12. The upper ends of the cylinder telescopic rods 6 are connected to the cylinder 3. The side walls of the cylinder 3 are fixedly installed with the first oil inlet pipe 2 and the second oil inlet pipe 5. The upper end surface of the cylinder 3 is fixedly installed with a steel beam 1. Displacement sensors 4 are respectively installed on the cylinders 3 on both sides. The displacement sensors 4 are electrically connected to the PLC controller 11. The network cable port of the PLC controller 11 is connected to the network cable port of the host computer 10 through a network cable.

[0035] The bus interface of the PLC controller 11 is connected to a comparison module 1102 .

[0036] The bus interface of the PLC controller 11 is connected to an alarm 1101 .

[0037] The bus interface of the PLC controller 11 is connected to a side operation authority module 1103 .

[0038] The bus interface of the PLC controller 11 is connected to a remote button authority operation module 1104 .

[0039] The bus interface of the PLC controller 11 is connected to a host computer HMI operation authority module 1105 .

[0040] When in use: the displacement sensors 4 installed on the oil cylinders 3 on both sides can measure the displacement distance of the oil cylinders 3 on both sides in real time during the electrode pressing and unloading system 12 pressing and unloading process through the measurement and coding functions inside the displacement sensors 4, and then perform data conversion and coding processing on the signals collected by the two displacement sensors 4; at the same time, the signals collected during the pressing and unloading process of the electrode pressing and unloading system 12 can be transmitted in the form of analog quantities to the four-bit AI Turck analog quantity acquisition module on site, and then the analog quantity signals are transmitted to the background main PLC controller 11 through the PROFIBUS bus protocol, and after data processing by the main station CPU and related conversion modules, a specific address is given in the form of digital quantity, and then connected to the HMI interface of the host computer 10WINCC operating system in the central control room through the local area network, so as to realize the human-machine exchange mode of electrode pressing and unloading operation and data monitoring; the comparison module 1102 is set to compare the collected pressing and unloading displacement signals in the PLC controller 11 According to the release stroke of the release cylinder 0-1200mm, a comparison instruction program is set in the program for the lifting displacement not exceeding 200mm and the lowering displacement not exceeding 800mm. When the actual displacement is between 200mm-800mm, the three-phase electrode displacement can be arbitrarily operated in three places; when the lifting or lowering displacement of the oil cylinder 3 in the electrode release system 12 exceeds the limit, that is, the displacement is less than 200mm or greater than 800mm, the three-phase electrode automatically triggers the upper and lower limit alarm instructions respectively, and the alarm 1101 sounds to remind the post operator in time to prevent other problems caused by the displacement exceeding the limit operation; the machine-side operation authority module 1103, the remote button authority operation module 1104, and the upper computer HMI operation authority module 1105 are set, and the relevant instructions are selected by selecting the switch 9 to ensure that the three-place operation can only allow the operation authority at one place at the same time, to prevent equipment failure caused by misoperation, safe and reliable operation, and fully guarantee the safety of operators.

Claims

1. A control device for an electrode pressing and releasing system of an electric arc furnace, comprising an electrode pressing and releasing system (12), wherein the electrode pressing and releasing system (12) comprises an upper brake (1201) and a lower brake (7), characterized in that: The surface of the lower brake (7) is provided with a cylinder telescopic rod (6), the number of the cylinder telescopic rods (6) is two, the cylinder telescopic rods (6) are arranged on both sides of the electrode pressing and releasing system (12), the upper end of the cylinder telescopic rod (6) is connected to the cylinder (3), the side wall of the cylinder (3) is fixedly installed with a first oil inlet pipe (2) and a second oil inlet pipe (5), and the upper end surface of the cylinder (3) is fixedly installed with a steel beam (1); displacement sensors (4) are respectively installed on the cylinders (3) on both sides, the displacement sensors (4) are electrically connected to the PLC controller (11), and the network cable port of the PLC controller (11) is connected to the network cable port of the host computer (10) through a network cable.

2. A control device for an electrode pressing and releasing system of an electric arc furnace as claimed in claim 1, characterized in that: The bus interface of the PLC controller (11) is connected to an alarm (1101).

3. The control device of the electrode pressing and releasing system of the ore-fired furnace according to claim 1, characterized in that: The bus interface of the PLC controller (11) is connected to a comparison module (1102).

4. A control device for an electrode pressing and releasing system of an electric arc furnace as claimed in claim 2, characterized in that: The bus interface of the PLC controller (11) is connected to a side operation authority module (1103).

5. The control device of the electrode pressing and releasing system of the ore-fired furnace according to claim 3, characterized in that: The bus interface of the PLC controller (11) is connected to a remote button authority operation module (1104).

6. The control device of the electrode pressing and releasing system of the ore-fired furnace according to claim 4, characterized in that: The bus interface of the PLC controller (11) is connected to a host computer HMI operation authority module (1105).

7. A control device for an electrode pressing and releasing system of an electric arc furnace as claimed in claim 6, characterized in that: The oil cylinder telescopic rod (6) is fixedly mounted on the surface of the lower brake (7) by means of bolts (8).

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