CN115109603A - Coal discharge control method for safety coal tower of coke oven - Google Patents
Coal discharge control method for safety coal tower of coke oven Download PDFInfo
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- 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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Abstract
The invention relates to a coal discharge control method for a safety coal tower of a coke oven, which comprises the following steps of 1: when the coal car reaches the lower part of the coal tower, the coal car is positioned by the action of the coal car alignment permanent magnet which is used for attracting the coal car alignment proximity switch; step 2: after the alignment is finished, the coal car PLC triggers the coal car to start the control magnetic switch to finish the coal discharging operation; the technical scheme is provided with a safe and reliable coal tower coal discharge electrical control system and multiple linkage and redundancy self-checking functions, and realizes that a coal car leaves and is separated from the upper proximity switch control of the coal tower, and the closing function of the coal tower is forcibly triggered. The control function that the coal car is used for mutual checking when coal is put and the coal nozzle is closed when the coal car is moved away, and meanwhile, the proximity switch of the coal tower is cut off is achieved.
Description
Technical Field
The invention relates to a control method, in particular to a coal discharge control method for a safety coal tower of a coke oven, 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 gate to open and close; 2. and opening and closing the coal nozzle of the coal tower gate by adopting an air cylinder mode. The electric control systems adopted by the two driving modes are both composed of a proximity switch and a magnetic switch, the current mainstream coke-oven plant generally adopts the technology of heavy industry or Taiyuan heavy industry, and the electric control systems have the following problems: 1. when any one of the closing signals of the coal nozzle of the coal tower is abnormal (such as a signal of a normal 1), the vehicle can be caused to think that the coal nozzle of the coal tower is closed to meet the conditions, but the actual coal nozzle is not closed, so that the vehicle leaves the coal tower to cause coal leakage accidents; 2. when the coal tower opening signal is abnormal, a driver does not find the abnormal signal, and coal leakage accidents can be caused for the decoupling walking of production operation; 3. when the coal car leaves, a coal tower opening signal is generated, and the 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 a relay loop control, and the logic linkage improvement potential is low. The situations occur on site, and by knowing that most of domestic coking plants have the problems, the coal leakage of some coal tower systems occurs several times per year, and the accident that the coal leakage is more than 600 tons is realized. The smooth operation of the production process is seriously influenced, more seriously, the hidden danger is brought to the personal safety of workers at the top of the coal tower, when the coal leakage happens, people just pass through the coal tower with the height of dozens of meters, the coal leakage flow speed in the space of the coal tower with the height of several meters is too high, and the possibility of escaping of the personnel is extremely low. There is a need for a new control linkage technique to solve the above problems in real-world use.
Disclosure of Invention
The invention provides a safe coal tower coal discharge control method for a coke oven, aiming at the problems in the prior art, the technical scheme is provided with a safe and reliable coal tower coal discharge electrical control system and multiple linkage and redundancy self-checking functions, and realizes that a coal car leaves, namely, the coal car is separated from the control of a proximity switch at the upper part of a coal tower, and the closing function of the coal tower is forcibly triggered. The control function that the coal car is mutually checked when the coal car is put in the coal, the coal nozzle is closed when the coal car is moved away, and the proximity switch of the coal tower is cut off is achieved. In order to realize the control of forcibly closing the coal tower when the coal tower is turned on or off, the driving mode cannot adopt a hydraulic cylinder motor control mode, and the motor can be burnt out by the action of closing all the time. The improvement adopts the cylinder as a driving mode of the coal nozzle action of the coal tower.
In order to achieve the purpose, the technical scheme of the invention is that the coal discharge control method of the safety coal tower of the coke oven comprises the following steps:
step 1: when the coal car reaches the lower part of the coal tower, the coal car is positioned by the action of the coal car alignment permanent magnet which is attracted to the coal car alignment proximity switch;
step 2: after the alignment is completed, the coal car PLC12 triggers the coal car to start the control magnetic switch 3, and the coal discharging operation is completed.
Step 1: the method comprises the following specific steps: when the coal car reaches the lower part of the coal tower, the coal car aligning proximity switch is actuated by actuation of the coal car aligning permanent magnet, the coal car-mounted PLC receives a coal car aligning proximity switch signal to judge that the coal car can perform subsequent actions after the coal car is aligned, and meanwhile, the coal car ground aligning permanent magnet actuates the coal tower ground aligning proximity switch to feed a coal tower aligning completion signal back to the coal tower ground PLC, and the coal tower ground PLC judges that the coal car has reached the lower part of the coal tower and is aligned; meanwhile, the coal car is connected with the coded cable antenna box through the coded cable decoder to read coded cable position information, the coded cable decoder feeds the position information back to the coal car PLC, the coal car PLC transmits the position information to the ground radio station through the radio station and feeds the position information back to 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 positioned on the coal tower and receives coal, and the coal car and the coal tower are confirmed to be aligned when the accurate position is met. When the coal tower ground alignment signal and the coded cable position are simultaneously provided, the coal tower ground PLC 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 specific steps: after the alignment is completed, the coal car PLC12 triggers the coal car switch-on control magnetic switch, the coal car switch-on control magnetic switch acts to attract the coal tower switch-on proximity switch, the coal tower switch-on proximity switch feeds back to the coal tower ground PLC, the coal tower ground PLC sends out a coal tower switch-on command to trigger the coal tower switch-on cylinder electromagnetic valve to act, and the pneumatic cylinder is driven to open the coal nozzle to carry out coal discharging operation. When a coal car hopper level gauge full-material signal triggers and controls a coal car PLC to send a closing command, the coal car closes a magnetic switch to actuate a coal tower closing proximity switch, the closing proximity switch is actuated to feed back a coal tower closing command to the coal tower ground PLC, the coal tower ground PLC triggers a coal tower closing cylinder electromagnetic valve to actuate, a driving cylinder closes 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 closing magnetic switch is triggered by the coal tower ground PLC to actuate a coal car closing proximity switch 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 traveling action can be performed after the coal action is completed; after the coal car moves, the coal car leaves the accurate coal tower aligning position, the coal tower ground PLC judges that the coal car leaves through the coal tower aligning proximity switch and the address analyzed by the coal car address decoder transmitted wirelessly, and the coal tower coal nozzle needs to be closed and kept. And cutting off input on-command and off-command proximity switch signals by the coal tower ground PLC, and forcibly outputting closing action of a coal nozzle of the coal tower to trigger the coal tower to close the electromagnetic valve of the air cylinder so as to keep closing action. Further realizing the coal discharging operation of the coal car, and the coal car moves the coal tower to be forcibly closed.
In the step 2, the coal tower ground PLC judges that if the coal tower ground proximity switch alignment signal and the coal car coded cable alignment signal are lost, the forced closing action of the coal tower coal nozzle is carried out. The point coal supply vehicle PLC for aligning the lost signal is fed back by the coal tower PLC through wireless communication, and the lost signal is displayed by the coal vehicle PLC, so that the operating personnel is reminded to carry out troubleshooting. 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 closed and kept immediately after leaving the coal nozzle cylinder. The influence of an external proximity switch and a magnetic switch of the coal tower electric control system is eliminated, and the magnetic switch, the on-off proximity switch and the on-off proximity switch on 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 action command output by the coal car PLC12 is wirelessly transmitted to the coal tower ground PLC14 and is verified 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 formed in fig. 3 includes, for example: the middle value of an opening instruction '1' output by the coal car PLC12 is wirelessly transmitted to the coal tower PLC14, a coal car 'opening signal' proximity switch is attracted and fed back to the coal tower ground PLC under normal conditions, and at the moment, the coal tower PLC makes comparison judgment and carries out coal discharging if the numerical quantity of the opening signal '1' wirelessly transmitted by the coal car and the value of the opening signal '1' input by the proximity switch are both 1, so that the coal discharging condition of the coal tower is met; if the comparison values are different, the coal tower PLC sends 'on signal' abnormal information and the abnormal information is fed back to the coal car PLC by the wireless loop and displayed on a picture, so that an operator is reminded of repairing which signal fails, and troubleshooting is facilitated. The logic flow diagram of the appellation control system is shown in fig. 3 below.
Compared with the prior art, the invention has the following advantages that the technical scheme provides a safe control system which has the following advantages: 1. the position of the coded cable is confirmed, and the stability of the coded position signal greatly enhances the system safety. And realizing multiple redundant linkage with coal car proximity switch alignment 1, coal tower proximity switch alignment 8 and coding cable position alignment, and judging and processing problems at each group of positions and discharging the products. 2. The coal discharging action can be carried out after the coal car is accurately aligned according to the position signal, the coal mouth of the coal tower is closed immediately when the coal car leaves, and the magnetic switch signal and the proximity switch signal are isolated when the coal car is not in position. 3. The wireless system is used for carrying out checking control of transmitting coal car action process signals and receiving magnetic switch feedback signals by a coal tower PLC: when the coal car sends a command to the coal tower PLC, the coal tower PLC does not receive a fault that the magnetic switch corresponding to the output is not closed or the output loop of the coal car fails to receive a fault, and when the coal car does not send a command to the coal tower PLC, the magnetic switch signals are normally closed and failed, mutual detection is convenient to overhaul and eliminate faults while safety is guaranteed.
Drawings
FIG. 1 is a control diagram of a safety coal tower coal discharge system
FIG. 2 is a PLC communication diagram of a coal car and a coal tower
FIG. 3 is a flow chart of safety coal tower control
Wherein: 1-coal car alignment proximity switch; 2-aligning the coal car with a permanent magnet; 3-controlling a magnetic switch by starting the coal car; 4-opening a proximity switch of the coal tower; 5-the coal car closes the magnetic switch; 6-closing the proximity switch of the coal tower; 7-aligning the coal car with the permanent magnet on the ground; 8-coal tower ground alignment proximity switch; 9-closing proximity switch of coal car; 10-tower closing magnetic 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-closing the cylinder electromagnetic valve by the coal tower; 30-a coal car radio station; 31-coded cable (ground); 32-coded cable antenna box (coal car upper part); 34-a coal tower radio station; 35-coded cable decoder (coal car upper);
the specific implementation mode is as follows:
for the purpose of enhancing an understanding of the present invention, the present embodiment will be described in detail below with reference to the accompanying drawings.
Example 1: referring to fig. 1, a coal discharge control method for a safety coal tower of a coke oven comprises the following steps:
step 1: when the coal car reaches the lower part of the coal tower, the coal car aligning permanent magnet 2 is attracted by the coal car aligning proximity switch 1 to act for positioning;
step 2: after the alignment is completed, the coal car PLC12 triggers the coal car to start the control magnetic switch 3, and the coal discharging operation is completed.
Step 1: the method comprises the following specific steps: when the coal car reaches the lower part of the coal tower, the coal car alignment proximity switch 1 is actuated by the actuation of the coal car alignment permanent magnet 2, the coal car vehicle-mounted PLC12 receives a coal car alignment proximity switch 1 signal 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 actuates the coal tower ground alignment proximity switch 8 to feed a coal tower alignment completion signal back to the coal tower ground PLC14, and the coal tower ground PLC14 judges that the coal car has reached the lower part of the coal tower and is aligned; meanwhile, in the figure 2, the coal car is connected with the coded cable antenna box 32 through the coded cable decoder 35 to read the position information of the coded cable 31, the coded cable decoder feeds back the position information to the coal car PLC12, the coal car PLC12 transmits the position information to the ground radio station 34 through the radio station 30 and feeds back the position information to the coal tower ground PLC14, the coal tower ground PLC14 judges that the receiving position and the accurate position of the coal car when the coal tower receives coal are located, comparison and verification are carried out, and the coal car and the coal tower are confirmed to be aligned when the accurate position is met. When the coal tower ground alignment signal and the coded cable position are both 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 specific steps: after the alignment is completed, the coal car PLC12 triggers the coal car on-control magnetic switch 3, the coal car on-control magnetic switch 3 acts to attract the coal tower on-proximity switch 4, the coal tower on-proximity switch 4 feeds back to the coal tower ground PLC14, the coal tower ground PLC14 sends a coal tower on-command to trigger the coal tower on-cylinder electromagnetic valve 16 to act, and the pneumatic cylinder is driven to open the coal nozzle to perform coal discharging operation. When a full-material signal of a coal car hopper level indicator 11 triggers and controls a coal car PLC12 to send out a closing command, a coal car closing magnetic switch 5 acts to attract a coal tower closing proximity switch 6, the closing proximity switch 6 attracts and feeds back a coal tower closing command to a coal tower ground PLC14, a coal tower ground PLC14 triggers a coal tower closing air cylinder electromagnetic valve 17 to act, an air cylinder is driven to close a coal nozzle, the coal nozzle closing completion triggers and controls a coal tower ground PLC14 by a coal nozzle closing limiting signal, a coal tower closing magnetic switch 10 acts to attract a coal car closing proximity switch 9 to feed back a coal nozzle closing signal to a coal car PLC12 by a coal tower ground PLC14, and the coal car PLC12 judges that the coal nozzle is closed and can carry out next-step traveling action after the coal action is finished; after the coal car moves, the coal car leaves the accurate coal tower aligning position, the coal tower ground PLC14 judges that the coal car leaves and the coal tower coal nozzle needs to be closed and kept through the coal tower aligning proximity switch 8 and the address analyzed by the wireless-transmitted coal car address decoder. The input opening command and closing command approach switch signals are cut off by the coal tower ground PLC14, the closing action of the coal nozzle of the coal tower is output forcibly, and the coal tower is triggered to close the electromagnetic valve 17 of the air cylinder to keep the closing action. And further realizing the coal discharging operation of the coal car, and forcibly closing the coal car by moving the coal tower.
In step 2, the coal tower ground PLC14 judges that forced closing action of the coal nozzle of the coal tower is performed if the coal tower ground proximity switch alignment 8 signal and the coal car coded cable alignment signal are lost. The coal tower PLC14 feeds back the point coal feeding car PLC12 aligning the lost signal through wireless communication, and the coal car PLC12 displays the lost signal so as to remind the operating personnel to carry out troubleshooting. 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 closed and kept immediately after leaving the coal nozzle cylinder. The influence of an external proximity switch and a magnetic switch of a coal tower electric control system is eliminated, the magnetic switch, the on-off proximity switch and the on-off proximity switch on the upper portion of the coal tower do not participate in the control of the coal tower after a vehicle leaves, the plum steel is taken as an example of 3 rows of coal nozzles, 4 groups of coal nozzles are arranged in each row, the magnetic switch is controlled, and 36 groups of 64 devices of signals of the on-off proximity switch do not participate in the control when the coal vehicle judges that an alignment signal is not in position, so that the influence of external signals on an electric system of the coal tower is greatly reduced.
In step 2, the action command output by the coal car PLC12 is wirelessly transmitted to the coal tower ground PLC14 and is verified 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 formed in fig. 1 includes, for example: the middle value of an opening instruction '1' output by the coal car PLC12 is wirelessly transmitted to the coal tower PLC14, a coal car 'opening signal' proximity switch is attracted and fed back to the coal tower ground PLC14 under normal conditions, and at the moment, the coal tower PLC14 makes a comparison judgment to perform coal discharging if the number quantum of the opening signal '1' wirelessly transmitted by the coal car and the value of the opening signal '1' input by the proximity switch are both 1, so that the coal discharging condition of the coal tower is met; if the comparison values are different, the coal tower PLC14 sends 'on signal' abnormal information and feeds the information back to the coal car PLC12 through a wireless loop and displays the information on a picture, so that an operator is reminded to overhaul which signal fails, and troubleshooting is facilitated. The logic flow diagram of the appellation control system is shown in fig. 2 below.
The specific embodiment is as follows: referring to fig. 1-3, the present example is technically modified according to the coal tower coal caving system of the mei steel 1A1B coke oven. And (3) installing newly-added coal car alignment magnetic steel on the upper part of the coal car in combination with the figure 1, and installing an alignment proximity switch for receiving the magnetic steel suction force of the coal tower on the upper part of the coal tower to complete the coal tower-coal car alignment signal function. The coal car-coal tower alignment function of the raw coal car system forms an external limiting double-positioning mode. A PLC control cabinet of the coal tower is newly added, and the small PLC LE35 series of AB company is adopted on the site, so that the requirement of external signal capacity of each row of 16 points on the site is met. And the coal car receives the aligning signal of the position of the coal tower to control the coal discharging control action of the coal car, and the coal tower receives the aligning signal of the position of the coal car to control the coal discharging action of the coal nozzle of the coal tower. The double-alignment signal also realizes the function that the coal car can not act after not receiving the alignment signal, the coal tower does not receive the position signal and forcibly closes the coal nozzle of the coal tower, the coal is discharged by the car, and the car leaves, namely, the coal nozzle of the coal tower is forcibly closed through electric control.
In combination with a wireless communication system which is already networked in the plum steel coal car shown in fig. 1, a radio data transmission radio station RLXIB-IHG model in a radio Linx series of Prosoft Technology manufacturers is adopted on site, the coal car radio station is used as a slave station, and a coal tower PLC is communicated with a ground master station which is already networked on the ground through an optical fiber circuit to complete communication between the coal tower PLC and the coal car PLC and is used for transmitting an action command sent by the coal car PLC. The coal tower PLC receives coal car data and limit signal external points received by external limits of the coal tower, the coal car data and the limit signal external points are logically compared, and then the coal tower is output to act, so that external limit check and control redundancy are achieved. And the close signal of the coal tower is transmitted through wireless communication, the coal tower PLC transmits an action command to the coal car PLC according to a similar principle, and the coal car PLC performs verification on the received coal tower limiting system signal, so that the walking action after the coal nozzle is safely closed after coal discharge is completed is realized.
The coal car collects and finishes address coding data to be compiled, the coded cable is used as an address scale in combination with the traveling of the plum steel coal car shown in the figure 1, the coded cable is confirmed according to three rows of positions of the plum steel coal tower, the absolute address of the coded cable at each position is compiled, the actual address of each row of counterpoint of the coal tower is used as data of the counterpoint of the coal tower coded cable, and the coded address counterpoint of the coal tower is confirmed. And transmitting the address pair position of the coal tower coding cable to the coal tower PLC for processing by adopting the wireless communication of the networking. The position alignment of the coded cable of the coal tower-coal car is realized, and the redundant alignment mode of confirming the position of the coal car by the coal tower PLC is further realized.
With reference to the schematic diagram of the system in fig. 3, the coal tower PLC implements logic: if the coal tower PLC does not receive a proximity switch type limit signal of the coal car or a position alignment signal of the coding cable, the closing action of the coal nozzle of the coal tower is output, so that the safety operation that the coal car leaves the coal discharging coal nozzle to be closed is realized. The mode can avoid the occurrence of coal leakage accidents caused by abnormal opening of the coal tower due to the influence of external limiting signals and misoperation of a driver operator.
It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and all equivalent modifications or substitutions based on the above-mentioned technical solutions are included in the scope of the present invention.
Claims (5)
1. A coal discharge control method for a safety coal tower of a coke oven is characterized by comprising the following steps:
step 1: when the coal car reaches the lower part of the coal tower, the coal car aligning permanent magnet (2) is used for attracting the coal car aligning proximity switch (1) to act for positioning;
step 2: after the alignment is finished, the coal car PLC (12) triggers the coal car to start the control magnetic switch (3) to finish the coal discharging operation.
2. The coke oven safety type coal tower coal discharge control method according to claim 1, characterized in that the step 1: the method comprises the following specific steps: when the coal car reaches the lower part of the coal tower, the actuation coal car alignment proximity switch (1) of the coal car alignment permanent magnet (2) acts, the coal car vehicle-mounted PLC (12) receives a 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 actuation coal tower ground alignment proximity switch (8) feeds back a coal tower alignment completion signal to the coal tower ground PLC (14) by the coal car ground alignment permanent magnet (7), and the coal tower ground PLC (14) judges that the coal car has reached the lower part of the coal tower and is aligned; meanwhile, the coal car is connected with a coding cable antenna box (32) through a coding cable decoder to read position information of a coding cable (31), the coding cable decoder feeds back the position information to a coal car PLC (12), the coal car PLC (12) transmits the position information to a ground coal tower radio station (34) through the coal car radio station (30) and feeds back the position information 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 coal car are in the accurate position when receiving coal from the coal tower, and carries out comparison and verification, when the accurate position is met, the coal car and the coal tower are confirmed to be aligned, and when the coal tower ground alignment signal and the coding cable position are simultaneously possessed, the coal tower ground PLC (14) can receive a coal car command and send a coal tower coal nozzle cylinder closing and opening action.
3. The coke oven safety type coal tower coal discharge control method according to claim 2, characterized in that the step 2: the method comprises the following specific steps: when the alignment is finished, the coal car PLC (12) triggers the coal car on-control magnetic switch (3), the coal car on-control magnetic switch (3) acts to attract the coal tower on-proximity switch (4), the coal tower on-proximity switch (4) feeds back to the coal tower ground PLC (14), the coal tower ground PLC (14) sends out a coal tower on-command to trigger the coal tower on-cylinder electromagnetic valve (16) to act, the pneumatic cylinder is driven to open the coal nozzle to carry out coal discharging operation, when the coal car hopper level gauge (11) is full of material, the coal car PLC (12) is triggered to send out a closing command, the coal car off-magnetic switch (5) acts to attract the coal tower off-proximity switch (6), the coal tower off-proximity switch (6) is closed to feed back the coal tower off-command to the coal tower ground PLC (14), the coal tower ground PLC (14) triggers the coal tower off-cylinder electromagnetic valve (17) to act, the air cylinder is driven to close the coal nozzle, the coal nozzle is closed, the coal nozzle is finished, the coal nozzle is triggered to control the coal tower ground PLC (14) by the coal nozzle closing limit signal, the coal tower ground PLC (14) triggers the coal tower closing magnetic switch (10) to act to attract the coal car closing approach switch (9) to feed back a coal nozzle closing signal to the coal car PLC (12), the coal car PLC1(2) judges that the coal nozzle is closed completely, and the next step of walking action is carried out after the coal action is finished; after the coal car moves, the coal car leaves the accurate coal tower aligning position, the coal tower ground PLC (14) judges that the coal car leaves through the coal tower aligning proximity switch (8) and a wirelessly transmitted coal car address decoder analysis address, the coal nozzle of the coal tower needs to be closed and kept, the coal tower ground PLC (14) cuts an input on command and an input off command proximity switch signal, the closing action of the coal nozzle of the coal tower is forcibly output to trigger the coal tower to close the air cylinder electromagnetic valve (17), the closing action is kept, the coal car is further put into operation, and the coal car moves the coal tower to be forcibly closed.
4. The coke oven safety type coal tower coal discharge control method according to claim 3, characterized in that in step 2, the coal tower ground PLC (14) judges that forced closing of the coal tower coal nozzle is performed if the coal tower ground proximity switch alignment signal and the coal car coded cable alignment signal are lost, the coal tower ground PLC (14) feeds back the point of the alignment loss signal to the coal car PLC (12) through wireless communication, and the coal car PLC (12) displays the image of the loss signal to remind an operator of troubleshooting.
5. The safety coal tower coal discharge control method of the coke oven according to claim 3 or 4, characterized in that the action command output from the coal car PLC (12) in the step 2 is wirelessly transmitted to the coal tower ground PLC (14) and is verified with the actual output value received by the coal tower PLC (14) and input by the proximity switch.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115109604A (en) * | 2021-03-23 | 2022-09-27 | 上海梅山钢铁股份有限公司 | Wireless IO type electrical control system for coke oven coal tower |
| CN116700082A (en) * | 2023-06-08 | 2023-09-05 | 重庆钢铁股份有限公司 | Coal bunker leakage-proof control system |
| CN118393983A (en) * | 2024-04-23 | 2024-07-26 | 马鞍山钢铁股份有限公司 | Coal shear flashboard closing detection device of coal charging truck and operation method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115109604A (en) * | 2021-03-23 | 2022-09-27 | 上海梅山钢铁股份有限公司 | Wireless IO type electrical control system for coke oven coal tower |
| CN115109604B (en) * | 2021-03-23 | 2024-07-19 | 上海梅山钢铁股份有限公司 | Wireless IO type electric control system for coke oven coal tower |
| CN116700082A (en) * | 2023-06-08 | 2023-09-05 | 重庆钢铁股份有限公司 | Coal bunker leakage-proof control system |
| CN118393983A (en) * | 2024-04-23 | 2024-07-26 | 马鞍山钢铁股份有限公司 | Coal shear flashboard closing detection device of coal charging truck and operation method |
| CN118393983B (en) * | 2024-04-23 | 2025-11-14 | 马鞍山钢铁有限公司 | A detection device for the closure of the coal receiving shear gate in a coal loading car and its operating method |
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