EP0150289B2 - System for the positioning of coke oven machines - Google Patents

Abstract

At a coke oven of a coking plant, each operating machine is provided with a U-shaped detector unit equipped with infrared light gates. Each operating station of the coke oven is provided with a signal plate carrying positioning marker elements for fine tuning the positioning of the operating machine at the operating station and with identification marker elements for identifying the respective operating stations. Each infrared light gate includes an infrared light source and an infrared light sensor connected to an electronic evaluation circuit comprising a memory with a reading monitor for detecting and correlating the coded identification markers on the signal plates. The electronic evaluation circuit also includes an electronic position evaluation subcircuit which controls the drive of the respective coke oven operating machine to move the same at a reduced speed if a first positioning pulse is transmitted and to stop the operating machine upon the occurrence of a pair of positioning pulses as well as an identification signal identifying a desired operating station.

Description

The invention relates to an arrangement for fine positioning of coke oven machines.

A coke plant usually consists of a coke oven, which is divided into several successive chambers is to operate them from the side and above with chamber doors closable openings are provided. At both Long sides and on top of the oven are on rails Movable operating machines arranged that are suitable are, each of the furnace chambers after opening the respectively assigned Chamber doors to operate, i.e. the chamber in question to feed and after the end of the coking process Pushing the glowing coke out onto a fire truck. To ensure trouble-free operation, is it is necessary to use the operating machines at the right time to position precisely.

To achieve this, DE-OS 26 48 049 is a method for controlling and monitoring the operation of coke oven operating machines known with both the path detection of the operating machines such as their fine positioning and Tie monitoring is possible. To do this are at the breakpoints of the individual coke oven operating machines along their Roadway code plates mounted, their information content of reading devices attached to the machines in the corresponding position can be recorded. These code plates serve at the same time, the center of the respective furnace chamber for the purpose of fine positioning of the operating machines. From a comparison of a central control unit predetermined target goals with the actual positions of the operating machines become signals for the control of the travel drives derived, through which the machines exactly in the middle of the furnace Come to a standstill. The center detection of the individual furnace chambers is by additional magnets on the code plates and appropriately arranged magnetic receivers on the operating machines performed. Depending on the direction and distance from the center of the oven, the reading device gives positive or negative voltages that are dependent on the direction of travel Setpoints influence the speed control of the travel drives until until with the signal "O" the machine in the middle of the furnace is stopped.

A positioning method using magnetic means has one in the zero range a relatively flat magnetic curve Field strength depending on the direction of movement and thus also the control voltage generated by the Hall generators.

The present invention has for its object a Arrangement of the type mentioned in such a way that a millimeter-precise positioning of the operating machines in a given position despite the large amount of dust and heat is possible.

This object is achieved by the specified in claim 1 Invention solved.

This ensures that for the identification of each Breakpoint and for the exact positioning of the concerned Operating machine with identical technical Funds can be worked, which greatly simplifies of the system and its compact arrangement, so that the harsh environmental conditions, characterized by dust and heat, mainly because of the use of infrared light as Information carrier, no influence on the accuracy of the System. Due to the possibility of bundling infrared light with optical means and the achievable thereby Photoelectric barrier formation can be compared to magnetic fields great response accuracy as an information carrier achieve at high speed of response, which among other things permitted, location identification without interrupting the journey to make.

Known code readers are the PP 2071 device and the predecessor device PP 2038, e.g. in the '82 catalog of photoelectrics Pauly GmbH is disclosed. There are possible uses for these devices known as the positioning of overhead cranes or shelf conveyors.

Figur 1

ein Blockschaltbild der Anordnung mit einer Wegerfassungsbaugruppe, einer Identifizierungs- und Positionierungsbaugruppe, einem Führungssollwertgeber sowie einer Steuerungselektronik für die Steuerung des Antriebsmotors einer Bedienungsmaschine,

Figur 2

die räumliche Prinzipdarstellung der Signalgebereinheit mit zugeordneter Signalplatte der Identifizierungs- und Positionierungsbaugruppe und

Figur 3

ein Funktionsschema der Identifizierungs- und Positionierungsbaugruppe mit zugeordneter Signalgebereinheit.

An embodiment of the invention is explained in more detail below with reference to the drawings. Show it:

Figure 1

2 shows a block diagram of the arrangement with a position detection module, an identification and positioning module, a guide setpoint generator and control electronics for controlling the drive motor of an operating machine,

Figure 2

the basic spatial representation of the signal generator unit with assigned signal plate of the identification and positioning module and

Figure 3

a functional diagram of the identification and positioning module with an associated signal transmitter unit.

According to the block diagram in Fig. 1 there is the positioning arrangement an operating machine from a position detection module 1, which is a signal generator 2 for path detection and an angular step signal generator coupled to the drive motor 3 are assigned. That from this position detection module 1 detected location signal is used both by an identification and positioning assembly 4 as well as one Lead setpoint generator 5 supplied. This in turn is with control electronics 6 for the drive motor 7 of the relevant Operating machine not shown connected. All units mentioned communicate via one Data bus 8 with a process computer, not shown. The identification and positioning assembly 4 is with one on the operating machine arranged signal transmitter 9 connected, which in connection with at the coke oven attached signal plates, not shown way of identification and description yet to be described Positioning signals generated.

After determining the respective location of the operating machine concerned by the Position detection module 1 generates this Location signal, which in the process computer with the location setpoint is compared. From these Both values will be the lead setpoint 5 a the direction of movement determining signal supplied. This gives the Control electronics 6 a corresponding Switch-on and direction of rotation command, its execution via the data bus 8 to the process computer is reported. At the same time, the identification and positioning assembly 4 from the travel detection module 1 an enable command and directional information from the process computer. As soon as the signal generator 9 reaches a signal plate, controls the identification and positioning assembly 4 den Lead setpoint generator 5 for location-dependent Speed setpoint output and issued Start and stop commands. This is what happens Positioning with the help of each stop assigned identification codes during the breakpoint itself with the help of two positioning marks placed on each signal plate in collaboration with a corresponding number of signal generators 9 assigned light barriers to be described Way is determined.

A possible embodiment of a Signal generator 9 of the type described above one of the associated coding plates 10 shown in Fig. 2. The signal generator is 9 the operating machine to be controlled and the marking plate of the associated furnace chamber. The U-shaped designed signal generator 9 has in one its legs infrared light transmitter 11, 12, 15 and infrared light receiver in the opposite leg 13, 14, 16. One sender and one receiver form an infrared light barrier. Here the arrangement is such that two of these Photoelectric sensors with transmitters 11 and 12 as well the assigned receivers 13 and 14 for exact positioning and the remaining 8, opposite the above arranged upwards Photoelectric sensors, with the transmitters 15 and the recipients 16 of the identification of the the breakpoint assigned to the respective furnace chamber serve (reading device). The marking plate 10 has correspondingly arranged, markings impermeable to infrared light. The both, the support body 17 of the marking plate 10 slightly higher markings on the side 18, 19 are arranged so that they in the Stop position the two positioning light barriers 11, 13 or 12, 14 at least partially interrupt. At least one of these marks is in the direction of movement of the marking plate 10 for adjustment purposes with an elongated hole provided so that after loosening an adjusting screw 20 this marker around a certain one Amount is adjustable in the direction of movement. Above these position marks are the Top edge of the support body 17 projecting outside Identification marks 21 arranged. They are placed so that they are at the breakpoints the identification light barriers assigned to them 15, 16 completely interrupt. By the number and arrangement of these identification marks can give each stop one certain coding can be assigned so that an appropriately programmed read memory is able to reach the breakpoint concerned identify.

Each of the infrared transmitters and infrared receivers is with the identification and positioning assembly 4 connected, which the of the Recipients 13, 14, 16 transmitted identification and positioning signals in connection evaluates with the central process computer.

3 shows a functional diagram from which the principle of operation of the arrangement emerges. Inside are a positioning light barrier 22, consisting of the positioning transmitter 23 with the transmitter diode 24 and the optical lens 25 and the positioning receiver 26 with the receiver diode 27 and the optical lens 28, and an identification light barrier 29, consisting of the identification transmitter 30 with the transmitter diode 31 and the optical lens 32, and the identification receiver 33 with the receiver diode 34 and the optical lens 35 shown. The transmitters and Receiver of the aforementioned light barriers 22, 29 are connected via a cable 36 to the identification and positioning assembly 4 connected. This has a logic module 37, a read memory 38 with a position indicator 39, one Position evaluation module 40, one automatic read monitoring module 41 and a power supply part 42.

If the logic module from the process computer 37 an enable signal is supplied via line 43 this switches the positioning transmitter and receiver, so that their transmitter diodes Send out infrared light, which by the associated optical lenses in parallel Rays of light is transformed by the opposite, assigned to the recipients optical lenses on that of the respective light barrier assigned receiver diode focused will. It is assumed that the marking plate 10 initially outside the Effective range of the light barriers and the operator machine concerned moved towards the signal generator. Achieved first the outside edge of the positioning marker 19 the positioning light barrier facing her 11, 13 so that they have the cross section of the light beam starting from zero over a maximum value in the middle of the light barrier until complete interruption at the end passes through (Fig. 2). The one assigned to this light barrier Positioning recipient transmitted this via the position evaluation module 40 to the process computer via line 44 supplies a start marker pulse, and the logic module 37 of the identification and Positioning module 4. This has at the beginning the journey from the process computer via the line 45 a target direction specification information received and now checks whether the direction of movement the operating machine of the desired one Direction specification corresponds. If not Case, the process computer stops by a corresponding one Control impulse to the Guide setpoint generator 5, the drive 7 via the Control electronics 6 and ensures by others Control impulses for a reversal of the direction of rotation and restarting the prime mover 7 in the opposite direction. Is the approached Direction coincides with the specified direction, the position evaluation module performs the Process computer via line 46 a «pre-position pulse »To what this the Command setpoint generator 5 for a changeover to "creep speed" during one of the position detection module 1 given route the operating machine causes. As soon as now the outside edge of the positioning mark 19 the further positioning light barrier 12, 14 reached (Fig. 2), the position evaluation module receives 40 a corresponding Impulse of the assigned positioning receiver and reports this to the logic module 37, which in turn read memory 38 and Identification transmitter and the identification recipient starts up. Then the lead Identification receiver the read memory 38th their identification impulses to who the read Coding via the data bus 47 to the process computer passes on. Correct the read coding does not match the target coding, the process computer reports this to the logic module 37, the position evaluation module 40 resets so that no shutdown the drive of the operating machine concerned takes place, which eliminates the "creep speed" and the operating machine is yours Can continue with normal driving. Right on the other hand, the read coding with the target coding matches, the position evaluation module 40 when reaching the target position line 48 sends an "in-position signal" to the Process computer. As soon as the positioning light barriers 11, 13 and 12, 14 from the markings 18, 19 are covered so far that their The position evaluation module guides the receiver 40 the management setpoint generator 5 a stop signal, which in turn via the control electronics 6 the drive motor 7 the operating machine stops. At the same time read memory 38 enters its contents in a Position indicator 39, which each reached Displays position in digital form.

If only the other operating machines have reached their target position. can he Filling or emptying process take place. After its completion, the logic module receives 37 a release from the process computer and renewed directional signal. As soon as one of the positioning light barriers again is free, the position evaluation module gives 40 via line 48 a «post-position pulse »To the process computer. At the same time the automatic read-monitoring module 41 released, the reading device 15, 16th constantly checked for errors when both positioning light barriers 11, 13 and 12, 14 not be covered. If an error occurs, be Position evaluation module 40 and read memory reset and the error to the process computer reported. This decides whether the Drive continues or is interrupted.

If the marking plate 10 with the Outer edge of one of their position marks 18, 19 has reached the next signal generator and one of the positioning light barriers interrupts, gives the position evaluation module the identification assigned to this signal transmitter and positioning assembly a corresponding Signal to the process computer and the process described is repeated.

As already stated, one is the position marks in the direction of movement adjustably arranged on the support body 17 2, the position marker 18 provided with an elongated hole. With the help of this Adjustment is possible, the responsiveness and tolerance of position marks to the desired value adjust and thus also the hysteresis, d. H. the deviation of the target position depending optimize from the direction of travel, d. H. the cheapest value depending on the different Operating machine parameters to choose.

Claims (2)

1. Arrangement for the fine-positioning of coke oven machines having coke oven operating machines movable on a track route on both sides of the oven chambers of a coke oven, wherein

   infrared light sources (11,12,15) and infrared light sensors (13,14,16), lying opposite each other at a distance, are arranged on the coke oven machines in the flanks of a U-shaped signal transmitter unit (9), so that they form light barriers which are used as part of a control device for the driving means of the operating machines,

   a signal plate (10) can be moved into the signal transmitter unit (9), on which signal plate identification and position markings (18,19,21) are arranged which correspond with the light barriers and are impermeable to infrared light,

   two of the infrared light barriers (11,12,13,14) are used for position recognition and the other infrared light barriers (15,16) are used for stopping-point signal code recognition,

   the identification markings (21) interrupt the identification light barriers (15,16), assigned to them, in the positioned state,

   the identification markings (21) are selected in such a way that a certain characteristic signal code corresponds to each stopping point,

   with their outer edges in the positioned state the position markings (18,19) are within the cross section of one of the two positioning light barriers (11,12,13,14), so that the assigned position markings (18,19) cover at least a part of the relevant beam so as to be impermeable to radiation,

   and wherein the infrared light sensors (13,14,16) are connected to analysing electronics (4), wherein, for the fine-positioning of the coke oven machines with the operating machines, position markings (18, 19) are fixed to a carrier body (17) of the signal plate (10) assigned to the respective oven chamber, at least one position marking of which is adjustable for setting the positioning accuracy in the direction of movement,

   wherein the position markings (18, 19) rise above the signal plate (10) in the direction of movement, wherein by interrupting a first positioning light barrier (11,13) a first pulse is transmitted to the one read-only memory (38) with read-only monitoring electronics (41) for recognising and assigning the coded identification markings (21) as well as analysing electronics (4) containing position analysing electronics (40), with the analysing electronics (4) establishing the direction of travel of the operating machines on the basis of this pulse,

   and wherein, in the case of the incorrect direction of movement, the analysing electronics (4) give a command to the operating machines for the reversal of the direction of travel, and in the case of the correct direction of movement a command for the reduction of the speed to a crawling speed,

   and wherein, by interrupting a second positioning light barrier (12,14), a second pulse is transmitted to the analysing electronics (4) and at the same time the code of the stopping point travelled through is read and transmitted to the analysing electronics (4),

   and wherein, after the simultaneous occurrence of the pulses of both positioning light barriers (11,12,13,14) and in the case of a correct code, the analysing electronics transmit a stop command to the operating machines and, in the case of the incorrect code, the operating machines are given the command to resume the full speed.
2. Arrangement according to claim 1,
   characterized in that the read-only monitoring electronics (41) constantly monitor the identification light barriers (15,16) during runs between the stopping points until one of the positioning light barriers (11,13 and 12,14) has reached the front edge of a position marking plate (18,19).

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