CN115109603B - Coal discharging control method for coke oven safety molded coal tower - Google Patents
Coal discharging control method for coke oven safety molded coal tower Download PDFInfo
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- CN115109603B CN115109603B CN202110305455.4A CN202110305455A CN115109603B CN 115109603 B CN115109603 B CN 115109603B CN 202110305455 A CN202110305455 A CN 202110305455A CN 115109603 B CN115109603 B CN 115109603B
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- 239000003245 coal Substances 0.000 title claims abstract description 511
- 238000007599 discharging Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000571 coke Substances 0.000 title claims abstract description 10
- 230000009471 action Effects 0.000 claims description 36
- 238000004891 communication Methods 0.000 claims description 10
- 230000001960 triggered effect Effects 0.000 claims description 8
- 238000012795 verification Methods 0.000 claims description 4
- 230000008030 elimination Effects 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 3
- 230000006870 function Effects 0.000 abstract description 5
- 230000002159 abnormal effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000004939 coking Methods 0.000 description 3
- 230000006855 networking Effects 0.000 description 3
- 239000004484 Briquette Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000013024 troubleshooting Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009131 signaling function Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B41/00—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
- C10B41/005—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke for charging coal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention relates to a coal discharge control method of a coke oven safety molded coal tower, which comprises the following steps of: when the coal car reaches the lower part of the coal tower, the actuation coal car alignment proximity switch of the coal car alignment permanent magnet is used for positioning; step 2: when the alignment is completed, the coal car PLC triggers the coal car to start to control the magnetic switch, and the coal discharging operation is completed; the technical scheme is provided with a safe and reliable coal tower coal discharging electric control system, multiple linkage and redundancy self-checking functions, and realizes that a coal car leaves, namely, is separated from the control of a proximity switch on the upper part of the coal tower, and forcedly triggers the closing function of the coal tower. The control function of the coal feeding mutual calibration of the coal carriage, the closing of the coal mouth when the coal carriage runs and the cutting of the proximity switch of the coal tower are achieved.
Description
Technical Field
The invention relates to a control method, in particular to a coal discharging control method of a coke oven safety molded coal tower, and belongs to the technical field of detection control.
Background
At present, two coal discharge driving modes are adopted in a coke oven coal tower system of a coking enterprise. 1. A hydraulic cylinder motor drives the coal nozzle of the coal tower flashboard to open and close; 2. the opening and closing actions of the coal nozzle of the coal tower flashboard are carried out by adopting a cylinder mode. The electric control systems adopted by the two driving modes are composed of a proximity switch and a magnetic switch, the current mainstream coking plants generally adopt the technology of large continuous heavy work or Taiyuan heavy work, and the electric control system has the following problems: 1. when any one of the coal nozzles of the coal tower is abnormal (such as a normal 1 signal), the vehicle is caused to think that the coal nozzle of the coal tower is closed and meets the condition, but the actual coal nozzle is not closed, so that the vehicle leaves the coal tower to generate coal leakage accidents; 2. when the signal of the coal opening tower is abnormal, a driver does not find that the production operation is separated from the running, and the coal leakage accident is caused; 3. when the coal car leaves, a coal tower opening signal proximity switch is abnormal, so that a coal nozzle is opened, and a coal leakage accident is caused; 4. the control of the coal nozzle of the coal tower adopts relay loop control, so that the potential of realizing logic linkage improvement is not great, and the like. The problems are caused by the fact that the problems are caused by most domestic coking plants, and accidents that coal leaks by more than 600 tons are caused by coal leakage of a coal tower system for several times in one year are realistic. The smooth operation of the production process is seriously affected, and even more serious, the potential hazard is brought to the personal safety of the top worker of the coal tower, when the coal leaks, people just pass through, coal is stored in the coal tower with the height of tens of meters, the coal leakage flow rate is too high in the space of the coal tower with the height of a few meters, and the possibility of personnel escaping is very small. New control linkage techniques are needed in real use to solve the above problems.
Disclosure of Invention
The invention aims at the problems existing in the prior art, and provides a coal discharging control method of a coke oven safe molded coal tower. The control function of the coal feeding mutual calibration of the coal carriage, the closing of the coal mouth when the coal carriage runs and the cutting of the proximity switch of the coal tower are achieved. In order to realize the control of turning off the coal tower by force when the vehicle runs, the driving mode cannot adopt the hydraulic cylinder motor control mode, and the motor is burnt by the action of always turning off. The improvement adopts an air cylinder as a driving mode of the action of the coal nozzle of the coal tower.
In order to achieve the above purpose, the technical scheme of the invention is as follows, and the method for controlling the coal discharge of the coke oven safety molded coal tower comprises the following steps:
Step 1: when the coal car reaches the lower part of the coal tower, the actuation coal car alignment proximity switch of the coal car alignment permanent magnet is used for positioning;
Step 2: when the alignment is completed, the coal car PLC12 triggers the coal car to start to control the magnetic switch 3, and the coal discharging operation is completed.
Step 1: the method comprises the following steps: when the coal car reaches the lower part of the coal tower, the suction coal car alignment proximity switch of the coal car alignment permanent magnet acts, the vehicle-mounted PLC of the coal car receives the coal car alignment proximity switch signal to judge that the coal car can perform subsequent actions after the coal car alignment is completed, and meanwhile, the coal car ground alignment proximity switch of the coal car ground alignment permanent magnet feeds back a coal tower alignment completion signal to the coal tower ground PLC, and the coal tower ground PLC judges that the coal car reaches the lower part of the coal tower to be aligned; meanwhile, the coal car is connected with the coding cable antenna box through the coding cable decoder to read the coding cable position information, the coding cable decoder feeds back the position information to the coal car PLC, the coal car PLC transmits the position information to the ground radio station through the radio station and feeds back the position information to the coal car of the coal tower ground PLC, the coal tower ground PLC judges the receiving position and the accurate position of the coal car when the coal car is in the coal receiving position of the coal tower to carry out comparison and verification, and the completion of the alignment of the coal car and the coal tower is confirmed when the accurate position is met. When the coal tower ground alignment signal and the coding cable position are simultaneously provided, the coal tower ground PLC can receive the command of the coal car and send out the closing and opening actions of the coal nozzle cylinder of the coal tower.
Step 2: the method comprises the following steps: when the alignment is completed, the coal car PLC12 triggers the coal car opening control magnetic switch, the coal car opening control magnetic switch acts to attract the coal tower opening proximity switch, the coal tower opening proximity switch is fed back to the coal tower ground PLC, the coal tower ground PLC sends a coal tower opening command, the coal tower opening cylinder electromagnetic valve is triggered to act, and the pneumatic cylinder is driven to open the coal nozzle for coal discharging operation. When a full signal of a coal car hopper level indicator triggers and controls a coal car PLC to send a closing command, a coal car closes a magnetic switch to actuate a closing proximity switch of a coal tower, the closing command of the coal tower is fed back to a coal tower ground PLC after the closing proximity switch is closed, the coal tower ground PLC triggers a coal tower Guan Qigang electromagnetic valve to actuate, a cylinder is driven to close a coal nozzle, the closing of the coal nozzle is completed, a coal nozzle closing limit signal triggers and controls the coal tower ground PLC, the coal tower ground PLC triggers a coal tower Guan Yanci switch to actuate the closing proximity switch of the coal car to feed back a coal nozzle closing signal to the coal car PLC, the coal car PLC judges that the closing of the coal nozzle is completed, and the next step of running action can be carried out after the coal receiving action is completed; after the coal car moves, the coal car leaves the accurate position of the coal tower alignment, and the coal tower ground PLC judges that the coal car leaves through the coal tower alignment proximity switch and the wireless transmission coal car address decoder analyzing address, and the coal tower coal nozzle needs to be closed and kept. The PLC on the ground of the coal tower cuts off the input on command and off command proximity switch signals, forcibly outputs the closing action of the coal nozzle of the coal tower to trigger the solenoid valve of the coal tower Guan Qigang, and keeps the closing action. So as to realize the coal discharging operation of the coal car and the forced closing action of the coal car coal tower.
In the step 2, the coal tower ground PLC judges that if the coal tower ground proximity switch alignment signal and the coal car coding cable alignment signal are lost, the forced closing action of the coal tower coal nozzle is carried out. The coal tower PLC feeds back the point of the position lost signal to the coal car PLC through wireless communication, and the coal car PLC displays pictures of the lost signal, so that operators are reminded to conduct fault elimination. The method realizes that the coal nozzle of the coal tower can act after the coal car is in place, and the coal car is immediately closed and kept after leaving the coal nozzle cylinder. The influence of an external proximity switch and a magnetic switch of the electric control system of the coal tower is eliminated, and the magnetic switch and the switch proximity switch at the upper part of the coal tower do not participate in the control of the coal tower after the vehicle leaves.
In step 2, the operation command output from the inside of the coal car PLC12 is wirelessly transmitted to the coal tower ground PLC14, and is checked with the actual output value received by the coal tower PLC14 and input by the proximity switch.
The system also realizes redundancy check of signals, and the wireless communication system is composed of fig. 3, for example: the intermediate value of the on command '1 ' output by the coal car PLC12 is wirelessly transmitted to the coal tower PLC14, the on signal ' proximity switch of the coal car under normal conditions is required to absorb and feed back to the ground PLC of the coal tower, and at the moment, the coal tower PLC makes comparison judgment that if the number of the on signal '1 ' wirelessly transmitted by the coal tower PLC and the value of the on signal '1 ' input by the proximity switch are 1, the coal tower coal discharging condition is met, and coal discharging is carried out; if the comparison values are different, the coal tower PLC sends abnormal information of 'on signal', and the abnormal information is fed back to the coal car PLC by the wireless loop and displayed on a picture, so that operators are reminded of overhauling which signal faults in which group are overhauled, and the fault troubleshooting is facilitated. The logic flow diagram of the control system is shown in FIG. 3 below.
Compared with the prior art, the safety control system has the following advantages that the safety control system is provided by the technical scheme: 1. the encoding cable is adopted to confirm the position of the bit, and the stability of the encoding position signal greatly enhances the system safety. And multiple redundant linkage is realized with the coal car proximity switch alignment 1, the coal tower proximity switch alignment 8 and the coding cable position alignment, and the furnace discharging is carried out after each group of positions are subjected to judgment processing. 2. The coal discharging action can be carried out after the accurate alignment of the coal car is completed according to the position signal, the coal car leaves to immediately close the coal mouth of the coal tower, and the isolation of the magnetic switch signal and the proximity switch signal of on and off when the coal car is not in position is realized. 3. The wireless system is used for transmitting the action process signal of the coal car and the PLC of the coal tower is used for receiving the verification control of the feedback signal of the magnetic switch: when the coal car sends out a command to the coal tower PLC and the corresponding magnetic switch failure is not received and output, the magnetic switch failure can not be closed or the vehicle output loop failure is not received, and when the coal car does not send out a command to the coal tower PLC and the corresponding magnetic switch signal is received, the magnetic switch signals are normally closed and failed, and mutual detection is convenient for overhauling and troubleshooting while ensuring safety.
Drawings
FIG. 1 is a control diagram of a coal discharging system of a safe briquette tower
FIG. 2 is a diagram of a coal car PLC system and a coal tower PLC communication
FIG. 3 is a control flow diagram of a safe briquette tower.
Wherein: 1-a coal car alignment proximity switch; 2-coal car alignment permanent magnet; 3-coal car opening control magnetic switch; 4-opening a proximity switch of the coal tower; 5-closing the magnetic switch by the coal car; 6-closing a proximity switch of the coal tower; 7-a coal car ground alignment permanent magnet; 8-a coal tower ground alignment proximity switch; 9-closing a proximity switch of the coal car; 10-column Guan Yanci switch; 11-a coal car hopper level gauge; 12-coal car PLC; 14-coal tower ground PLC; 16-opening a cylinder electromagnetic valve of the coal tower; 17-coal tower Guan Qigang solenoid valve; wherein 30-coal car station; 31-encoding a cable; 32-coding a cable antenna box; 34-coal tower station; 35-encoding cable decoder.
Detailed Description
In order to enhance the understanding of the present invention, the present embodiment will be described in detail with reference to the accompanying drawings.
Example 1: referring to fig. 1, a method for controlling coal discharge of a coke oven safety molded coal tower comprises the following steps:
step 1: when the coal car reaches the lower part of the coal tower, the action of the suction coal car alignment proximity switch 1 of the coal car alignment permanent magnet 2 is positioned;
Step 2: when the alignment is completed, the coal car PLC12 triggers the coal car to start to control the magnetic switch 3, and the coal discharging operation is completed.
Step 1: the method comprises the following steps: when the coal car reaches the lower part of the coal tower, the suction coal car alignment proximity switch 1 of the coal car alignment permanent magnet 2 acts, the coal car on-board PLC12 receives the signal of the coal car alignment proximity switch 1 to judge that the coal car can perform subsequent action after the coal car alignment is completed, meanwhile, the coal car ground alignment permanent magnet 7 sucks the coal tower ground alignment proximity switch 8 to feed back the coal tower alignment completion signal to the coal tower ground PLC14, and the coal tower ground PLC14 judges that the coal car reaches the lower part of the coal tower to be aligned; meanwhile, in fig. 2, the coal car is connected with the coding cable antenna box 32 through the coding cable decoder 35 to read the position information of the coding cable 31, the coding cable decoder feeds back the position information to the coal car PLC12, the coal car PLC12 transmits the position information to the ground radio 34 through the radio 30 to feed back the position of the coal car address of the coal tower ground PLC14, the coal tower ground PLC14 judges that the receiving position and the accurate position of the coal car are compared and verified when the coal car is in the coal tower receiving position, and the completion of the coal car and the coal tower alignment is confirmed when the accurate position is met. When the coal tower ground alignment signal and the coding cable position are simultaneously provided, the coal tower ground PLC14 can receive the coal car command and send out the closing and opening actions of the coal tower coal nozzle cylinder.
Step 2: the method comprises the following steps: when the alignment is completed, the coal car PLC12 triggers the coal car opening control magnetic switch 3, the coal car opening control magnetic switch 3 acts to attract the coal tower opening proximity switch 4, the coal tower opening proximity switch 4 is fed back to the coal tower ground PLC14, the coal tower ground PLC14 sends out a coal tower opening command, the coal tower opening cylinder electromagnetic valve 16 is triggered to act, and the pneumatic cylinder is driven to open the coal nozzle for coal discharging operation. When a full material signal of a coal car hopper level gauge 11 triggers and controls a coal car PLC12 to send a closing command, a coal car closing magnetic switch 5 acts and attracts a coal tower closing proximity switch 6, after closing the proximity switch 6, the closing command of the coal tower is fed back to a coal tower ground PLC14, the coal tower ground PLC14 triggers the action of a coal tower Guan Qigang electromagnetic valve 17, a cylinder is driven to close a coal nozzle, the coal nozzle closing completion triggers and controls the coal tower ground PLC14 by a coal nozzle closing limit signal, the coal tower Guan Yanci switch 10 is triggered by the coal tower ground PLC14 to act and attracts a coal nozzle closing proximity switch 9 to feed back a coal nozzle closing signal to the coal car PLC12, the coal car PLC12 judges that the coal nozzle is closed, and the next walking action can be carried out after the coal receiving action is finished; after the coal car moves, the coal car leaves the accurate position of the coal tower alignment, and the coal tower ground PLC14 judges that the coal car leaves through the coal tower alignment proximity switch 8 and the wireless transmitted coal car address decoder resolving address, and the coal tower coal nozzle needs to be closed and kept. The PLC14 on the ground of the coal tower cuts off the input on command and off command proximity switch signals, forcibly outputs the closing action of the coal nozzle of the coal tower to trigger the solenoid valve 17 of the coal tower Guan Qigang, and keeps the closing action. So as to realize the coal discharging operation of the coal car and the forced closing action of the coal car coal tower.
In step 2, the coal tower ground PLC14 determines that if the coal tower ground proximity switch alignment 8 signal and the coal car code cable alignment signal are lost, the forced closing operation of the coal tower coal nozzle is performed. The coal tower PLC14 feeds back the point of the position lost signal to the coal car PLC12 through wireless communication, and the coal car PLC12 displays the picture of the lost signal, so that operators are reminded of performing fault elimination. The method realizes that the coal nozzle of the coal tower can act after the coal car is in place, and the coal car is immediately closed and kept after leaving the coal nozzle cylinder. The influence of an external proximity switch and a magnetic switch of the electric control system of the coal tower is eliminated, the magnetic switch and the switch proximity switch at the upper part of the coal tower are not involved in the control of the coal tower after the vehicle leaves, the plum steel is taken as a coal nozzle of example 3,4 groups of the switch proximity switches are controlled, and the magnetic switch and 36 groups of 64 devices of switch proximity signals are controlled, so that the influence of the external signal on the electric system of the coal tower is greatly reduced when the coal car judges that the alignment signal is not at the position.
In step 2, the operation command output from the inside of the coal car PLC12 is wirelessly transmitted to the coal tower ground PLC14, and is checked with the actual output value received by the coal tower PLC14 and input by the proximity switch. The system also realizes redundancy check of signals, and the wireless communication system is composed of fig. 1, for example: the intermediate value of the on command '1' output by the coal car PLC12 is wirelessly transmitted to the coal tower PLC14, a normal-condition coal car 'on signal' proximity switch is absorbed and fed back to the coal tower ground PLC14, and at the moment, the coal tower PLC14 makes comparison judgment that if the number of the on signals '1' wirelessly transmitted by the coal tower PLC14 and the value of the on signal '1' input by the proximity switch are 1, the coal tower coal discharging condition is met, and coal discharging is carried out; if the comparison values are different, the coal tower PLC14 sends abnormal information of 'on signal', and the abnormal information is fed back to the coal car PLC12 by a wireless loop and displayed on a picture, so that operators are reminded of overhauling which signal faults in which group are convenient to troubleshoot. The logic flow diagram of the control system is shown in FIG. 2 below.
Specific examples: referring to fig. 1-3, the present example is based on the technical modification of the coal tower coal discharge system of Mei Gang A1B coke oven. In combination with FIG. 1, a newly added coal car alignment magnetic steel is arranged on the upper part of the coal car, and an alignment proximity switch for receiving the suction force of the magnetic steel is arranged on the upper part of the coal tower, so that the coal tower-coal car alignment signal function is completed. The coal car-coal tower alignment function of the raw coal car system forms an external limiting double-positioning mode. A new coal tower PLC control cabinet is added, and a small PLC LE35 series of an AB company is adopted on site, so that the requirement of the capacity of external signals of 16 points in each column on site is met. And the coal car receives the in-place signal of the position of the coal car to control the coal discharging control action of the coal car, and the in-place signal of the position of the coal car is received by the coal car to control the coal discharging action of the coal mouth of the coal car. The double alignment signals also realize that the coal car cannot act when not receiving the alignment signals, the coal tower cannot receive the position signals to forcibly close the coal mouth of the coal tower, the coal is discharged by the car, and the coal mouth of the coal tower is forcibly closed by electric control when the car leaves.
In combination with the wireless communication system of FIG. 1 Mei Gang that the coal car has networking, the RLXIB-IHG model in the wireless data transmission station RadioLinx series of Prosoft Technology manufacturer is adopted on site, the coal car station is used as a slave station, the coal tower PLC is communicated with the ground master station on the ground, which has networking, through an optical fiber line, and the communication between the coal tower PLC and the coal car PLC is completed, so that the action command sent by the coal car PLC is transmitted. The coal tower PLC receives the coal car data and the external points of the limiting signals received by the external limiting of the coal tower, and then outputs the coal tower to act, so that the check sum control redundancy of the external limiting is realized. And the closing signal of the coal tower is transmitted through wireless communication, the action command is transmitted to the coal car PLC by the coal tower PLC according to the similar principle, and the coal car PLC performs verification on the received coal tower limit system signal, so that the running action after the coal mouth is safely closed after coal discharging is completed is realized.
The coded cable is adopted as an address scale in combination with the coal car running of FIG. 1 Mei Gang, the coal car is collected to finish address coding data to compile, the three-column position of the coal tower of the plum steel is confirmed, the absolute address of the coded cable at each position compiles the actual address of each column of the coal tower to serve as the data of the coal tower coded cable alignment, and the coal tower coded address alignment point is confirmed. And transmitting the address pair position points of the coal tower coding cable to the coal tower PLC for processing by adopting networking wireless communication. The position alignment of the coding cable of the coal tower-coal car is realized, and the redundant alignment mode of the coal tower PLC for confirming the position of the coal car is further realized.
In combination with the system schematic diagram of fig. 3, the coal tower PLC implements logic: if the coal tower PLC does not receive the proximity switch type limit signal of the coal car or the position alignment signal of the coding cable, the coal tower coal nozzle closing action is output, so that the safety operation that the coal car is closed when leaving the coal discharging coal nozzle is realized. The mode can avoid the occurrence of abnormal coal leakage opening accidents of the coal tower caused by misoperation of operators of drivers due to the influence of external limiting signals.
It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and equivalent changes or substitutions made on the basis of the above-mentioned technical solutions fall within the scope of the present invention as defined in the claims.
Claims (1)
1. The method for controlling the coal discharge of the coke oven safety molded coal tower is characterized by comprising the following steps of:
Step 1: when the coal car reaches the lower part of the coal tower, the action of the suction coal car alignment proximity switch (1) of the coal car alignment permanent magnet (2) is positioned;
step2: when the alignment is completed, the coal car PLC (12) triggers the coal car to start the control magnetic switch (3) to complete the coal discharging operation;
Wherein, step 1: the method comprises the following steps: when the coal car reaches the lower part of the coal tower, the suction coal car alignment proximity switch (1) of the coal car alignment permanent magnet (2) acts, the coal car PLC (12) receives the signal of the coal car alignment proximity switch (1) to judge that the coal car can perform subsequent actions after the coal car alignment is completed, meanwhile, the coal car ground alignment permanent magnet (7) sucks the coal tower ground alignment proximity switch (8) to feed back a coal tower alignment completion signal to the coal tower ground PLC (14), and the coal tower ground PLC (14) judges that the coal car reaches the lower part of the coal tower to be aligned; meanwhile, the coal car is connected with an encoding cable antenna box (32) through an encoding cable decoder to read the position information of an encoding cable (31), the encoding cable decoder feeds back the position information to a coal car PLC (12), the coal car PLC (12) is transmitted to a ground coal tower station (34) through a coal car station (30) and fed back to the coal car address position of a coal tower ground PLC (14), the coal tower ground PLC (14) judges that the receiving position and the accurate position of the coal car are in the coal receiving position of the coal tower for comparison and verification, the completion of the alignment of the coal car and the coal tower is confirmed when the accurate position is met, and when the coal tower ground alignment signal and the encoding cable position are simultaneously provided, the coal tower ground PLC (14) can receive a coal car command and send out the closing and opening actions of a coal nozzle cylinder of the coal tower;
Wherein, step 2: the method comprises the following steps: when the alignment is finished, the coal car PLC (12) triggers the coal car opening control magnetic switch (3), the coal car opening control magnetic switch (3) acts to attract the coal tower opening proximity switch (4), the coal tower opening proximity switch (4) is fed back to the coal tower ground PLC (14), the coal tower ground PLC (14) sends a coal tower opening command, the coal tower opening electromagnetic valve (16) is triggered to act, the pneumatic cylinder is driven to open the coal mouth for coal discharging operation, when the coal car hopper level gauge (11) is full of a signal, the coal car PLC (12) is triggered to control the coal car PLC (12) to send a closing command, the coal car closing magnetic switch (5) acts to attract the coal tower closing proximity switch (6), the coal tower closing command is fed back to the coal tower ground PLC (14) after the coal tower closing proximity switch (6) is attracted, the coal tower Guan Qigang electromagnetic valve (17) is triggered to act, the coal mouth is driven to close the coal mouth, the coal mouth is closed by the coal mouth closing limit signal, the coal mouth is triggered to control the coal tower ground PLC (14), the coal mouth is closed by the coal mouth closing limit signal, the coal mouth is triggered to close the coal tower Guan Yanci switch (10) to close the coal mouth, the coal mouth is tightly (9), and the coal mouth is closed by the coal car is closed, and the coal mouth is fed back to the coal mouth is closed, and the coal mouth is judged to finish to act; after the coal car moves, the coal car leaves the accurate position of the coal tower alignment, the coal tower ground PLC (14) judges that the coal car leaves through the coal tower ground alignment proximity switch (8) and the wireless transmitted coal car address decoder, the coal tower coal mouth needs to be closed and kept, the coal tower ground PLC (14) cuts off the input on command and off command proximity switch signals, the closing action of the forced output coal tower coal mouth triggers the coal tower Guan Qigang electromagnetic valve (17) to keep the closing action, and further the coal car is put into the coal operation, and the forced closing action of the coal car coal tower is realized;
In the step 2, the coal tower ground PLC (14) judges that if one of the coal tower ground proximity switch alignment signal and the coal car coding cable alignment signal is lost, forced closing action of the coal tower coal nozzle is carried out, the coal tower ground PLC (14) feeds back the point of the lost signal to the coal car PLC (12) through wireless communication, and the coal car PLC (12) displays the picture of the lost signal, so that an operator is reminded of carrying out fault elimination;
In the step 2, an action command output by the inside of the coal car PLC (12) is transmitted to the coal tower ground PLC (14) by wireless, and is checked with an actual output value received by the coal tower PLC (14) and input by a proximity switch.
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