Device for control of electric arc furnace installation |
|
IPC classes for russian patent Device for control of electric arc furnace installation (RU 2475800):
 Method for continuous control of level of hot melt in bath of ore thermal furnace operating in resistance mode / 2475686
One measures electrode voltage and current as well as the phase voltage direct component, with the hot melt bath depth determined in accordance with a mathematical expression. The invention essence consists in usage of the semi-conductor effect of the electrode contacting the hot melt. This effect results in appearance of a direct component in phase voltage which is registered with a special device. The bath depth and the hot melt quantity may be determined by the value of decline of the phase voltage direct component dependence on current.
 Power control of arc-type steel-making furnace / 2448165
Control includes power setting device for each phase of furnace, the first controlled key with two control inputs, dead zone unit, the second and the third controlled keys, the second time register, two constant voltage sources and adder. Adder output is connected to input of the first controlled key and to its first control input. Output of the first controlled key is connected to input of controlled reversible converter to the output of which there connected is electrode movement motor. Output of the first time register is connected to the second control input of the first controlled key, the first input of which is connected to output of power setting mechanism, and the second one is connected to output of the second controlled key, the input of which is connected to output of the first constant voltage source, and the first control input is connected to the second control input of the first controlled key, to the first control input of the third controlled key, to output of the first time register and to input of the second time register the output of which is connected to the first control input of the second controlled key the second input of which is connected to output of the second constant offset voltage source, and output is connected to the third adder input.
 Device for control of electric mode of arc steel-smelting furnace / 2436265
Device comprises a unit (1) of power current setting, the output of which is connected to the positive input of a summator (2), to the negative input of which the output of the power current sensor (3) is connected. The output of the summator (2) is connected to the input of a controller (4), the output of which is connected to the input of a drive (5) for electrode displacement. The output of the drive (5) of electrode displacement is connected to the input of a sensor (6) of electrode displacement speed, the output of which is connected to the input of a link (7), characterising a model of a control object. The output of the link (7) is connected to the negative input of the summator 2.
 Power current oscillation suppression device for arc steel furnace / 2433576
Offered device comprises series current sensor (1), vibration transducer (2), filter (3) with its output connected to a positive input of a first adder (5) with its negative input connected to a allowed current oscillation amplitude unit (4), an output of the first adder (5) is connected to an input of a first comparator (6) with its output connected to a pulse former (7) and a first pulse counter (8), also the output of the first comparator (6) is series connected to NOT component (9), an AND component (10), a second pulse former (11) and a second pulse counter (12). An output of the first pulse counter (8) and the second pulse counter (12) are connected respectively to negative and positive inputs of a second adder (13) with its third input connected to an output of an amplification coefficient unit (15), an output of the amplification coefficient unit (15) is also connected to a first input of a second comparator (14) with its second input connected to an output of the second adder (13), an output of the second comparator (14) is connected to a second input of the AND component (10).
 Method to control capacity of arc three-electrode ac electric furnace with application of single-phase controlled reactors / 2432718
Method consists in balancing capacity along phases by means of arc current control in each electrode and control of electric parameters of a short circuit by connection of single-phase controlled electric reactors of transformer type into phases between a furnace transformer and a short circuit into one or several phases with the least value of reactive resistance.
 Phase-by-phase power control method of three-electrode alternating current electric furnace / 2424639
Method consists in phase-by-phase power balancing by current control of arc of each of electrodes and controlling of electric parameters of low-voltage circuit by switching on three-phase controlled transformer-type electric reactor between furnace transformer and low-voltage circuit.
 Procedure for control over operation of ore-thermal furnace / 2424481
Procedure consists in control over voltage on electrodes during furnace operation and over degree of electric arc development in under-electrode space of each electrode by means of electric filter; degree of development is determined by value of dc component in phase voltage of each electrode. To reduce development of arc in closed furnaces when specified value of dc component of phase voltage is exceeded, charge is loaded in a region of the electrode where formation of cavity is taking shape. Otherwise, the electrode is transferred or it is transferred and steps of a furnace transformer are switched to lower voltage, while charge is "peaked" or "pierced" in open furnaces.
 Method for determining electric resistances of zones of work space of electric arc furnace / 2418394
In method for determining electric parametres of zones of work space of electric arc furnace there performed is measurement of instantaneous values of current and phase voltage of electrode, amplitude values and phase of current and voltage and calculation as to them of electric resistances of zones of work space by using their equivalent circuits. At that, as equivalent circuits there used are circuits with active electric resistance connected to equivalent circuit in series relative to electric resistance of arc, which characterises the melt zone in near-electrode space of arc furnace and active electric resistance connected to equivalent circuit, which characterises charge zone shunting the arc in near-electrode space of arc furnace. At that, instantaneous values of current and voltage are measured at time interval divisible by the current change period; as per those values, values of differential active resistance of electrode circuit are calculated. Maximum value of this resistance and average value of its minimum values is determined. At that, electric resistance of zones of work space is calculated as per the specified ratios.
 Procedure for control over electric mode for deviations from maximum of useful power (maximum output) in ore-smelting furnace / 2407052
Procedure for control over electric mode of ore-smelting furnace consists in measuring secondary phase voltage and current of electrodes, in additional recording ratio of active and reactive constituents of phase voltage, in determination of position of maximums of useful power by electrical resistance of active losses and reactive resistance of phase, in determination of power consuming and power saving fields relative to electrical modes, and in changing current of electrodes and voltage to eliminate deviations from maximal useful power.
 Arc furnace electric mode controller power setter / 2402890
Arc furnace electric mode controller power setter containing a furnace phase current sensor, an arc current setting unit, an arc voltage sensor, an arc voltage setting unit and a comparator unit is additionally equipped with a first, a second and a third multiplier units, an amplifier, a divider unit and a multi-functional transducer. The first output of the multi-functional transducer is connected to the second input of the first multiplier unit whose first input is connected to the comparator unit output via the amplifier. The first multiplier unit output is connected to the first input of the divider unit whose output is the device output. The second input of the divider unit is connected to the second output of the multi-functional transducer whose first input is connected to the output of the furnace transformer voltage level switch with its second input connected to the connected to the output of the phase current setting unit and the second input of the second multiplier unit the first input whereof is connected to the current sensor output; the second multiplier unit output is connected to the first input of the comparator unit the second input whereof is connected to the output of the third multiplier unit the first and the second inputs whereof are connected to the voltage sensor output and the voltage setting unit output accordingly.
 Method and apparatus for testing valve control system / 2461860
Control system includes a computing device adapted to receive feedback signals from each of a plurality of control valves. The method comprises the following steps: connecting a test device to the control system such that the test device is connected for signal transmission to the computing device; transmitting a signal to the computing device simulating a feedback signal from at least one of the control valves; detecting a control signal which is transmitted by the computing device to the at least one of the control valves; and identifying the detected control signal which is transmitted by the computing device to the control valve.
 Method of synchronising two control devices and automatic system with backup / 2461038
First control device (2) and second control device (5) are connected with each other. Each has several functional modules (FB1, FB2, FB3, FB1', FB2', FB3'), through which control functions thereof are realised by a technical process. The first control device (2) periodically operates its functional modules (FB1, FB2, FB3) to control the technical process, owing to which internal states of the functional modules (FB1, FB2, FB3) are generated. When controlling the technical process using the first control device (2), data on internal states of functional elements thereof are transmitted with distribution over several cycles to a second control device (5). The second control device (5) assigns the transmitted data on internal states to its functional modules (FB1', FB2', FB3'). The present invention also relates to an automatic system (1) with backup.
 Replacement method of structural components of automation system / 2449339
During current operation of automation system regardless of performance of function of structural component, first, there changed is type of structural component by means of design tools in design environment; at that, type designation is not changed; then, instance of structural component is changed in functional plan for the changed structural component and structural changes are marked accordingly; at the next step the replaced structural component is shifted to automation system in parallel and without having effect on current operation; after that, configuration that considers replaced structural component is selected in automation system without interruption of operation so that changed and replaced structural component is activated.
 Module to control and/or transfer data / 2439645
System comprises multiple adjacent input/output modules, besides, each input/output module includes at least one input/output channel and at least one first signal slot for connection of an input/output signal channel with a data bus, and at least one second signal slot for connection of a bus subscriber with an input/output signal channel, besides, the system comprises a module of data control and/or transfer, besides, the data control and/or transfer module comprises circuits for selective control of multiple input/output modules and is mechanically connected to multiple input/output modules and forms a detachable device with them, besides, there are multiple input/output modules to locate a data control and/or transfer module.
 System for automating process for detecting, controlling or influencing various process or status parameters / 2422872
System (1) has at least one control station (4) and a plurality of field devices (5), wherein in each field device (5) there is at least one sensor (11) for determining a measured value (Mx) of a defined process parameter (G) and/or status parameter (Z) and/or an actuating element (12) for influencing the determined process parameter (G) and/or status parameter (Z) through the default value (Sx). Each field device cyclically or acyclically provides every other field device (5) of the system (1) with obtained measurement values (Mx) and/or default values (Sx) of the process parameter (G) and/or status parameter (Z), which are specific for each measurement device, as information (I), and accordingly, current information (I) on both obtained measurement values (Mx) and/or default values (Sx) of the process parameter (G) and/or status parameter (Z) is available for each field device (5) in form of the current vector (P) of the process status, wherein in the field devices (5) and/or the control station (4) there is a control-processing unit (16).
 Devices, systems and methods regarding plc / 2419826
System for data exchange between modules of a programmable logic controller (PLC) comprises a first module of a first chain of modules. Each adjacent pair of the first chain of modules is functionally connected in series. The first module is functionally connected to the PLC. The first module comprises a transmitting circuit and a receiving circuit. The first module is adapted to exchange data with the PLC through 8B/10B coded frames. Frames of said 8B/10B coded frames have message type field of a size which corresponds to eight bits. The value stored in said message type field servers as a feature for the contents of the data field of each of said frames. Said message type field follows the ordered sequence of fields composed of the said frame. Said ordered sequence of fields has a preamble field, a frame onset field, a destination address field, a length field and a source address field.
 Devices, systems and methods for assigning plc module address / 2419825
First message is sent from a programmable logic controller (PLC) to a module, said first message is transmitted via a first 8B/10B encoded frame that comprises a destination address corresponding to an eight bit default module address of said module, said first message is adapted to set a module address of said module to an assigned address value and transmit a reply message via a second 8B/10B encoded frame that comprises a source address that confirms said assigned address value has been assigned to said module by said first message, said first 8B/10B encoded frame comprising a message type field of a size that corresponds to eight bits.
 System of control and communication including at least one unit of automation / 2419824
System of control and communication consists of unit of automation adapted for operational programme, and of unit of technical support adapted for change of operational programme. The latter includes a code configurator. The automation unit includes a structure of interpreter adapted for switching a catalogue of required functions for automation of operational programme and empty structure of data. The structure of interpreter is adapted for interpretation of changes in the configurable structure of data and facilitation of the changed operational programme on base of functions of automation of the said catalogue and changed configurable structure of data.
 Devices, systems and methods of configuring programmable logic controller / 2417391
System for automatic configuration of a user interface in a programmable logic controller comprises a user interface tenderer which can be adapted to render a plurality of distinct user interfaces. Each user interface can be adapted to configure the corresponding software application. The user interface tenderer can be adapted to automatically provide a first user interface if the said PLC executes a control program, and a second user interface if the said PLC does not execute the said control program. The first user interface can be adapted to simplify debugging of the selected software application and to receive debugging input from the user. The second user interface can be adapted to provide the current set of configuration parametres and to receive configuration input from the user. In response to the configuration input, the second user interface can be adapted to change configuration parametres from the current set of configuration parametres.
 Method of determining sequence of processing functional modules of automation system and automation system / 2383916
Group of inventions relates automation system design. The result is achieved due to that an automation system and method are proposed for determining the sequence of processing functional modules of a technological function, where inside part of the functional modules there is a feedback loop and the functional modules are connected to each other to realise the technological function. A first functional module is determined, outputs of which are or not connected or give out one or more output signals of the technological function. Further, a second functional module is sought against the flow direction of signals, where outputs of the module are or are not connected or receiving input signals of the technological function or receives the feedback signal through one of its inputs. Further, from the second functional module in each next module in the direction of flow of signals to the first functional module, all inputs of modules are identified, where the inputs are or are not connected or receive the input signal of the technological function or receives the feedback signal through one of its inputs or connected to the output of another functional module all inputs of which are already identified, and the sequence of processing functional modules is established according to the sequence of marking the functional modules.
 Device for controlling tower crane / 2259579
Device has electronic control block for controlling all movements of crane, like raising, rotation, distribution and carrying, radio control block, indicators, commutators, speed alternators, drive organs, connected to crane movements and crane safety means, while electronic block is made with possible receipt on its inputs of radio control block signal, signals of indicators and signals of commutators, processing these signals, and outputting on its outputs of launch commands and stop commands while providing control of operation of seed alternators or drive organs, connected to crane movements, and also crane safety means.
|
FIELD: electrical engineering. SUBSTANCE: device for the electric arc furnace installation contains an automatic control device (3), with the furnace control functional unit (6), the electrodes adjustment functional unit (7) and the melting control functional unit (8) integrated into the control device (3). EFFECT: simplification of the control device and maintenance thereof. 9 cl, 1 dwg
The invention relates to a device for controlling the electric arc furnace installation. Electric arc furnaces are often used in the steel industry, for example, for melting scrap or sponge iron in an electric arc furnace can melt other metals. The EAF is based on the conversion of electric energy into heat energy, and uses the principle of the electric arc. This produces power up to 200 MW. Arc furnace can be performed as an oven DC (usually with one electrode) or as an oven three-phase current (typically with three electrodes). Installation of steel can also include several electric arc furnaces. For example, often the actual electric arc furnace, in which melting, should the oven with built-in cream (bottling bucket), which is also designed as an electric arc furnace. Bottling bucket is a transport tank, which is filled with liquid metal from the electric arc furnace. In a furnace with a pouring ladle is entered, for example, additives that improve the quality or there is additional processing. Automating the installation of an electric arc furnace requires consideration of many functions. For example, you can specify the furnace control to control the main functions of the furnace, regulation of electrodes, which establishes the final length and power of the electric arc, and management of the melt. For all of these functions must be provided by the respective automation device. These automation device must implement the installation of an electric arc furnace every time-consuming tested in pair and the perfect interplay and consistent with each other. The associated costs of hardware is relatively high and there are high costs for installation and commissioning, as it is necessary to install multiple automation devices with their own distribution cabinets. Therefore, the object of the invention is a device to control the installation of an electric arc furnace, which is improved in view of the foregoing. To solve this problem in a device of the aforementioned type in accordance with the invention provided that the functional unit for oven control, function block to control electrodes and the functional block for control of the heat-integrated control device. This means that for oven control, control electrodes and control of the heat, due to the preferred integration now requires only one control device is AutoRAE centrally implements management. Consuming negotiation mates and complicated setup different way of existing software tools are now no longer required. The cost of hardware is reduced, and reduced costs for installation and commissioning. Regulation of the electrodes is performed at the same time to control the shape and position of the electric arc. This includes, for example, regulation, at least one hydraulically moveable electrode, and setting the distance to the molten metal. Through oven control is managing the overall functions of an electric arc furnace. They cover, for example, hydraulically floating roof of the furnace, unloading the furnace, for example, when obtaining a resulting slag releasing molten metal, and cooling the furnace. This also includes a measuring device, as well as carrying out of control actions via remote control, with which staff can influence the mode of operation of the furnace. The control fuse is, ultimately, control of the process. Here, for example, control how much energy is required at a particular point in time, to melt the current amount of material. This also determines when, for example, should the and be entered Supplement. In another preferred embodiment, in the control device can be integrated, at least one additional functional unit. Such additional functional blocks may, for example, to constitute a functional unit for energy optimization, and/or functional unit to recognize the foamy slag and regulation, and/or functional block for process optimization, and/or functional unit for regulating the supply of energy in the definitions of the energy provider, and/or the functional unit for the individual consumer control. In the ideal case, all these components are integrated into a single automatic control device, so you only need one control device. Then there is no need for all other control devices. Function block for the optimization of energy may, in particular, to manage the optimization of energy through the neural network. By means of such artificial intelligence is possible to optimize the energy consumption, quality and other production parameters. Foamy slag means the layer of slag, which floats on the molten metal and purposefully formed so that the heat did not reach the walls of the furnace, and was absorbed in the foam. For the formation of fines which the slag may for example, be made of carbon. At the same time the height of the foamed slag is determined, for example, the detector structure-borne noise in the metal reservoir furnace. These components correspond to the functional block foamy slag and regulation of foamy slag. Function block for the optimization process may, for example, to include the computer model, which enables optimization of the process also in the sense of a higher level. For example, the liquid metal can be routed directly to the installation of continuous casting, which specifies the data regarding the quantity of material being processed. Regulation of the energy supply in determining the energy supplier may be required if, for example, provided the maximum number of pickup at a certain time. Through the appropriate functional unit is regulated, where, for example, energy can be saved, what the unit is currently able to disconnect, etc. In addition, the control device can be integrated functional unit for the individual consumer regulation. One such functional unit includes the parameters set individually for the consumer, which individualiziruyut system as a whole. But it is also possible that each is e functional blocks thus formed, they can easily be reconciled with the needs of the consumer, so that individualization can take place on other integrated functional blocks. Preferably, the device may include a mounting block which contains functional units, in particular in the nests. Similarly, the mounting block may represent, for example, distribution Cabinet, which houses a control device, which typically includes a computing device. In another preferred implementation of the functional blocks made modular, can be made replaceable or removable. Thus is described a modular structure, which can be aligned arbitrarily. In accordance with this individual function blocks can be added or removed to the scope of functions of the device to agree to meet individual needs. Also a simple method can be implemented replacement of the defective functional units. Moreover, you can easily replace legacy functional blocks, for example, newly developed functional blocks, so that the device to control the installation of an electric arc furnace is always up to date. With this modular implementation of the functional blocks can be implemented, Nikon is C, two possibilities how to implement the configuration, and whether it should be done. First of all, it can be provided that the control device is made with the possibility of automatic recognition and configuration of the functional block. The newly introduced functional block in accordance with this performs information exchange with the control device, thereby automatically configuring. This functional unit are associated with respective ranges of performance, such as processors, memory, etc. However, alternatively it is also possible that there are slots for functional blocks, and each nest is set in accordance with a continuous range of performance contained in the control device of a computing device. When this is no longer possible no special configuration, so as to each slot and, thus, with the inserted functional block that has already been mapped ranges of performance, that is, for example, processor power, memory, software, etc. this system is less complex, but less flexible. The preferred way function blocks can be configured individually. Then may not the a similar agreement with the needs of the customer. For information exchange with the control device or contained in the computing device functional blocks can be connected to the system bus. For this purpose, any suitable known types of bus systems that meet the specified criteria for performance. In the preferred implementation can be provided that at least two functional blocks are integrated into a single functional unit. So, for example, to control electrodes and energy optimization provides a single functional unit. This is always possible in this case, when the performance criteria functional block allow the application of several of these functionalities. This saves the nest, and implemented a more compact structure. Other advantages and details of the proposed invention follow from the following exemplary embodiment and the drawing. While the drawing shows a corresponding to the invention the device 1 to control the installation of an electric arc furnace. It includes a mounting block in the form of the switchgear Cabinet 2, in which is placed an automatic control device 3. Automatic control device 3 includes a computing device 4, which may contain one or more storage device the century Additionally, there are many nests 5, some of which are occupied by the functional blocks 6-13 module type. Functional blocks 6-13 are removable, in particular interchangeable. Socket 5 and they are connected with the system 14 of the bus that connects them with the computing device 4. Functional blocks 6-13 are individually configurable, so that they can be governed in accordance with the specific needs of the user. In this example, with each slot 5 correlated appropriate range of performance, so no further configuration after insertion of the functional unit is not required. Alternatively, it is also possible that the control device 3 can be performed with automatic recognition and configuration of functional blocks. In particular, it provides a functional block 6 for oven control, function block 7 to the control electrodes, the functional block 8 for control of the heat, the functional block 9 for energy optimization, the functional block 10 for recognition foamy slag and regulation of foamy slag, the functional block 11 for process optimization, functional unit 12 for regulating the supply of energy in determining the energy supplier and the functional block DS for individual user control. Except for the necessary functional blocks 6-8 for oven control, regulation of electrodes and control of the heat, other functional blocks 9-13 are optional, which means that they do not necessarily have to be for a working device to control the installation of an electric arc furnace, or may be available, under certain circumstances, in the form of other automated functional blocks. Based on the modular nature can easily be further equipped with additional functional blocks, as well as other functional blocks 9-13 can be removed. Also need an integrated functional blocks 6-8 may, for example, when the defect or replace the new model, to be replaced without any problems. In particular, it is also possible that two functional blocks are integrated into one functional block. For example, it would be possible functional unit 7 to the control electrodes and the functional block 9 for energy optimization combined into one functional block. Functional blocks 7 and 9 would then be removed and replaced with a new functional unit. Due to this, fewer functional blocks. In General, using the device to control the installation of an electric arc furnace by means of the integrated resh is the which is arranged to control the installation of an electric arc furnace, while maintaining simplicity of design and maintenance. By embedding in only one Cabinet reduced the cost of manufacturing, installation and commissioning. In particular, in a plant for the processing of metal, along with the actual electric arc furnace, for melting may also be provided, for example, a furnace with a pouring ladle as other electric arc furnace. Like another installation of an electric arc furnace can be controlled by the same device 1, and should be used accordingly modified parameterization. 1. Device to control the installation of an electric arc furnace, comprising an automatic control device (3), 2. The device according to claim 1, 3. The device according to claim 1 or 2, 4. The device according to claim 3, 5. The device according to claim 4, 6. The device according to claim 4, 7. The device according to claim 1, 8. The device according to claim 1, 9. The device according to claim 1,
|