CN111378459A - Method for protecting coal charging car limiting - Google Patents
Method for protecting coal charging car limiting Download PDFInfo
- Publication number
- CN111378459A CN111378459A CN201811633538.0A CN201811633538A CN111378459A CN 111378459 A CN111378459 A CN 111378459A CN 201811633538 A CN201811633538 A CN 201811633538A CN 111378459 A CN111378459 A CN 111378459A
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- China
- Prior art keywords
- limit
- oil cylinder
- charging car
- coal charging
- limiting
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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
- C10B31/00—Charging devices
-
- 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
Abstract
The invention relates to a method for protecting the limit of a coal charging car, which comprises the following steps: step 1), detecting a limit abnormal condition; step 2) after the backward or forward movement instruction of the oil cylinder is sent, under the condition that a corresponding backward limit signal or a corresponding forward limit signal is not detected within a set time, the operation of a hydraulic system is immediately stopped if the oil cylinder is judged to be not moved due to no limit trigger or hydraulic fault, and an alarm display is carried out on an operator picture; and 3) timing and monitoring the action process of the oil cylinder. The technical scheme is used for protecting the limit of the coal charging car, and safety and environmental protection accidents caused by limit faults of the coal charging car are avoided.
Description
Technical Field
The invention relates to a limiting method, in particular to a method for protecting a coal charging car from limiting, and belongs to the technical field of electrical control.
Background
The top coal charging car of the coke oven is a core link of coke oven production and is used for charging coal in a coal hopper of the coal charging car into a carbonization chamber of the coke oven. Because the raw coke oven gas and the coal powder diffused in the coal feeding process are combusted near the coal feeding port, the peripheral coal feeding flashboards, the inner and outer guide sleeves, the furnace cover confirmation and other limits are influenced, the raw coke oven gas and the coal powder are burnt or signals are mistakenly sent, and further production safety accidents are caused. As the oil cylinders of the coal charging car are the most of the four cars of the coke oven, the limit of the oil cylinders relates to the interlocking conditions of coal feeding, dust removal, running and the like, the functions are more critical, and reliable monitoring measures are required to ensure the state to be reliable. In the original oil cylinder control technology, generally, only an oil cylinder switching value limiting signal is detected for judging whether linkage conditions are met or not, namely the control system considers that the linkage conditions are met under the condition that the corresponding signal of the oil cylinder is triggered, and higher safety risks exist, for example, an ammonia water switching oil cylinder stretches out in the coal feeding process, the rear limit breaks down (a rear limit signal is frequently generated), the coal feeding vehicle still runs due to the fact that the rear limit signal arrives but does not retreat in the process of returning the oil cylinder, the coal feeding vehicle control system judges that the running linkage conditions are met by mistake, and even under the condition that the ammonia water switching oil cylinder is not withdrawn at one point, the oil cylinder damage accident is caused. Therefore, there is a strong need for a device to solve the above technical problems.
Disclosure of Invention
The invention provides a method for protecting the limit of a coal charging car aiming at the problems in the prior art, and the technical scheme is used for protecting the limit of the coal charging car and avoiding the safety and environmental protection accidents of the coal charging car caused by the limit fault.
In order to achieve the purpose, the technical scheme of the invention is as follows: a method of protecting a coal charging car curb, the method comprising the steps of:
step 1), detecting a limit abnormal condition;
step 2) after the backward or forward movement instruction of the oil cylinder is sent, under the condition that a corresponding backward limit signal or a corresponding forward limit signal is not detected within a set time, the operation of a hydraulic system is immediately stopped if the oil cylinder is judged to be not moved due to no limit trigger or hydraulic fault, and an alarm display is carried out on an operator picture;
3) and timing and monitoring the action process of the oil cylinder.
As an improvement of the invention, the step 1) of detecting the limit abnormal condition specifically includes accessing limit signals into a vehicle-mounted control system of the coal charging car, monitoring the limit states through a logic control program in a background mode, judging that the limit is faulty when the control system detects that a back limit signal and a front limit signal arrive at the same time, generating an alarm signal, and prohibiting the next process action of the oil cylinder.
As an improvement of the present invention, the step 3) performs timing monitoring on the cylinder operation process, specifically, as the coal charging car is produced circularly and continuously, in the normal production process, the operation time of the cylinder in each operation flow is basically constant, if the standard time that the ammonia water switching cylinder extends from the rear limit to the front limit is T, the operation time of the cylinder is timed in the production process, and if the actual operation time T1 from the rear limit to the front limit is greater than the standard time T, it can be determined that an abnormal condition occurs, and the operation of the next operation flow is prohibited.
A link mechanism includes: the guide rod, the limiting base, the first guide plate, the second guide plate, the shifting fork, the limiting clamping block and the pin shaft, one end of the shifting fork is connected with the limiting stop block of the oil cylinder or the transmission mechanism, the other end of the shifting fork is connected with the guide rod through the pin shaft, a displacement signal of the oil cylinder or the transmission mechanism is transmitted out, and the first guide plate and the second guide plate respectively play a role in fixing the shifting fork and the guide rod. The limiting part is fixed on the limiting base through the limiting clamping block and receives displacement signals of the oil cylinder or the transmission mechanism transmitted by the guide rod.
Compared with the prior art, the invention has the advantages that,
(1) the vehicle-mounted control system monitors the limiting state of the oil cylinder in real time, automatically judges the limiting abnormal condition and forbids the next flow action, and avoids the subsequent oil cylinder damage accident caused by limiting false triggering.
(2) The limit monitoring and the shutdown protection of the hydraulic system are realized through a logic control program, the no-action fault of the hydraulic system is automatically identified, and the damage to the hydraulic system caused by long-time action of the oil cylinder due to the fact that the limit does not trigger the fault is also avoided.
(3) The working time of each oil cylinder is monitored according to the working characteristics of each oil cylinder of the coal charging car, the accuracy of the position information of the oil cylinders is ensured, and the abnormal oil cylinders are automatically judged by the vehicle-mounted control system and the next flow action is forbidden.
(4) The protection of limiting the open fire position is enhanced, the reliable transmission of the position signal of the oil cylinder is ensured and the limit is prevented from being burnt by high temperature through a connecting rod mechanism, and the limit service life is prolonged.
Drawings
FIG. 1 is a flow chart of a limit abnormality determination;
FIG. 2 is a schematic diagram of a coal charging car position limiting arrangement and operation;
FIG. 3 is a schematic view of a link and limit arrangement and operation;
FIG. 4 is a block diagram and assembly view of the gate plate spacing linkage;
FIG. 5 is a schematic view of a guide bar structure;
FIG. 6 is a schematic view of a structure of a limiting base;
FIG. 7 is a schematic structural diagram of a guide plate I and a guide plate II;
FIG. 8 is a schematic view of a fork structure;
fig. 9 is a schematic structural view of the limiting clamp block.
In the figure: 1-coal feeding gate plate; 2-coal feeding flashboard limiting; 3-an inner guide sleeve oil cylinder; 4-limiting the inner guide sleeve; 5-lower limiting of the inner guide sleeve; 6-outer guide sleeve oil cylinder; 7-limiting the outer guide sleeve; 8-lower limiting of the outer guide sleeve and 9-flashboard limiting connecting rod; 10-limiting the flashboard; 11-inner guide sleeve limit connecting rod; 12-limiting the inner guide sleeve; 13-outer guide sleeve limit connecting rod; 14-outer guide sleeve limiting, 15 guide rods, 16 limiting bases, 17 guide plates I, 18 guide plates II, 19 shifting forks, 20 limiting clamping blocks, 21 pin shafts and 22 limiting.
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: in order to achieve the purpose, the technical scheme of the invention is as follows, and the limit protection method of the technology judges the abnormal limit condition of the oil cylinder of the coal charging car by a time comparison method. As the coal charging car uses different types of oil cylinders to carry out the work of each flow, the working environment of the oil cylinders is severe, the electrical limit damage for detecting the position of the oil cylinders has uncertainty, and important oil cylinder limit is required to be monitored in order to avoid accidents caused by limit faults. Taking the ammonia water switching oil cylinder of the coal charging car as an example, when the coal charging car starts to charge coal, the oil cylinder extends out to reach the front limit, and after the coal charging is finished, the oil cylinder retracts to reach the rear limit. A method for protecting coal charging car limit when limit fault occurs, the method comprises the following steps:
step 1) detecting limit abnormal conditions, connecting limit signals into a vehicle-mounted control system of the coal charging car, monitoring the limit states through a logic control program background, judging that the limit is faulty when the control system detects that a rear limit signal and a front limit signal arrive at the same time, generating an alarm signal, and forbidding the next process action of the oil cylinder;
and 2) after the backward or forward movement instruction of the oil cylinder is sent, under the condition that a corresponding backward limit signal or a corresponding forward limit signal is not detected within a set time, the operation of the hydraulic system is immediately stopped if the oil cylinder does not move due to limit non-triggering or hydraulic fault, and the alarm display is carried out on an operator picture.
And 3) timing and monitoring the action process of the oil cylinder. Because the production of the coal charging car is cyclic and continuous, the operation time of the oil cylinder in each action flow is basically constant in the normal production process, for example, the ammonia water switching oil cylinder extends from the rear limit position to the front limit position, the time is 7 seconds, the oil cylinder retracts from the front limit position to the rear limit position, the time is 5 seconds, and the time is basically constant. Therefore, the time can be monitored, if the standard time for the ammonia water switching oil cylinder to extend from the rear limit to the front limit is T, the operation time of the oil cylinder is counted in the production process, and if the actual operation time T1 from the rear limit to the front limit is greater than the standard time T, the abnormal condition can be judged, and the next process is forbidden. The abnormality determination flowchart is shown in fig. 1. Before the coal feeding vehicle performs running operation, the control system allows linkage running only under the condition that the cylinders (ammonia water switching cylinders and the like) are detected to have rear limit signals and no front limit signals, and if the front limit signals occur at the same time, the control system judges that the cylinders are in limit fault and forbids subsequent flow actions; when the oil cylinder starts to extend, the control system times the extending time T1 of the oil cylinder and continuously compares the time with the standard extending time T, if the time T1 is far greater than T (more than 2T) before the front limit is generated, the vehicle-mounted control system judges that the oil cylinder slowly moves or the front limit does not trigger the fault and outputs an alarm, and the long-time fault operation of the hydraulic system or the long-time operation of the oil cylinder caused by the fact that the front limit does not trigger the fault are avoided. If the front limit signal is generated, T1= T, it indicates that the action time of the oil cylinder is consistent with the standard time, and the next flow action can be normally performed; if T1 is far greater than T (more than 1.5T), the oil cylinder is judged to be slow in action, and an alarm prompt is output to check the hydraulic system; if T1 is far less than T (less than 0.7T), it is judged that the possibility of false triggering exists when the action of the oil cylinder is over speed or the front limit is exceeded, an alarm is output to prompt the checking of a hydraulic system and the front limit, the next flow action can be stopped according to the importance degree of the oil cylinder, and the occurrence of accidents is avoided. Similarly, the abnormal conditions of the oil cylinder rear limit and the hydraulic system are also checked according to the flow method in the action of the oil cylinder rear limit.
By adopting the logic control method, the key limit of the coal charging car can be monitored, and accidents caused by limit faults or abnormal oil cylinder actions are avoided. However, the working environment of the coal charging car is severe, the oil cylinder which is usually in open fire position to work is limited, and high-occurrence faults caused by the working environment cannot be fundamentally avoided.
The conventional installation and working schematic diagram of the coal feeder is shown in fig. 2 by taking the coal feeding flashboard opening and closing limit, the inner guide sleeve upper and lower limit and the outer guide sleeve upper and lower limit which are commonly used by the coal feeder as examples. The coal feeding gate plate is arranged beside the gate plate oil cylinder in a limiting way, and the gate plate opening and closing signals are generated along with the extension and retraction of the gate plate oil cylinder. The upper and lower limiting of the inner guide sleeve are arranged along the working direction of the inner guide sleeve, when the inner guide sleeve is arranged on the upper part, the upper stopper of the inner guide sleeve can trigger the upper limit 4 of the inner guide sleeve, and when the inner guide sleeve is arranged on the lower part, the lower stopper of the inner guide sleeve can trigger the lower limit 5 of the inner guide sleeve. The upper and lower limiting of the outer guide sleeve are arranged along the working direction of the outer guide sleeve, when the outer guide sleeve is arranged on the upper part, the upper stopper of the outer guide sleeve can trigger the upper limit 7 of the outer guide sleeve, and when the outer guide sleeve is arranged on the lower part, the lower stopper of the outer guide sleeve can trigger the lower limit 8 of the outer guide sleeve. In the coal feeding working process of the coal feeding vehicle, the limiting oil cylinder drives the stop block to trigger corresponding limiting in the action process, and a signal is generated to the electric control system. Because spacing is nearer from adding coal mouthful position, consequently easy high temperature burns out and produces the mistake signal, and then causes the production safety accident. Therefore, the technology provides a limiting connecting rod mechanism, the stroke of the oil cylinder is converted according to the working characteristics of different oil cylinders, the corresponding limiting position is moved out from the position near the coal feeding port, and the purpose of protecting the limiting position is achieved, and the assembly and working schematic diagram of the connecting rod and the limiting position is shown in fig. 3. Each set of link mechanism comprises a guide rod 15, a limiting base 16, a guide plate I17, a guide plate II 18, a shifting fork 19, a limiting clamping block 20, a pin shaft 21 and the like, and is arranged beside an oil cylinder or a transmission mechanism with high-temperature open fire. Through the limiting connecting rod mechanism, the opening and closing or lifting actions of the oil cylinder are converted into other displacement amounts through the conversion of the mechanical structure to move out of the coal port area, and the corresponding limiting is triggered by the connecting rod, so that a signal is transmitted to the electric control system for control. Taking the installation of the shutter plate limit link mechanism as an example, the structure diagram of the link is shown in fig. 4. One end of the shifting fork is connected with a limiting stop block of the oil cylinder or the transmission mechanism, and the other end of the shifting fork is connected with the guide rod through a pin shaft to transmit a displacement signal of the oil cylinder or the transmission mechanism. The guide plate 1 and the guide plate 2 respectively play a role in fixing the shifting fork and the guide rod. The limiting part is fixed on the limiting base through the limiting clamping block and receives displacement signals of the oil cylinder or the transmission mechanism transmitted by the guide rod. Through the assembly and the adjustment to these parts, will originally transfer to link mechanism through the spacing trigger function that the dog realized, realize when the dress coal flashboard is opened, the spacing limit of opening of flashboard that the coal feeding mouth position was kept away from is triggered through link mechanism to the flashboard hydro-cylinder, and when the dress coal flashboard was closed, the flashboard hydro-cylinder was triggered through link mechanism and is kept away from the spacing limit of closing of flashboard that the coal feeding mouth position was kept away from. Taking the example of improving the coal feeding flashboard position limitation of the coal feeding car to shift, the connecting rod mechanism is manufactured and assembled and debugged according to the size shown in figure 3. One end of the connecting rod mechanism is arranged on the gate oil cylinder, and the other end of the connecting rod mechanism extends out of the gate for triggering and moving out to limit the gate. When the oil cylinder pushes the coal feeding gate to be opened, a connecting rod with one end connected with the oil cylinder is also driven to trigger the limit opening limit of the other end; when the coal feeding flashboard is pulled to be closed by the oil cylinder, the connecting rod with one end connected with the oil cylinder is also driven to trigger the limit of the other end, and after the function of transmitting a limit signal by the connecting rod mechanism is realized, the service life is prolonged because the new flashboard limit is far away from the open fire baking in the coal feeding process, so that the safe and reliable operation of the flashboard limit is ensured. In a similar way, the inner guide sleeve and the outer guide sleeve limiting connecting rod mechanism are manufactured and installed, and the limiting is shifted to obtain the same effect.
The front and rear limit chain protection functions are established for each limit with reference to the flow chart shown in fig. 4. Taking the signal monitoring of the coal-charging car ammonia water switching oil cylinder returning to the rear limit from the front limit as an example, setting the standard returning time T =5 seconds, ensuring that the oil cylinder reliably returns to the rear limit position, ensuring that the ammonia water switching oil cylinder electric rear limit signal arrives, and ensuring that the moving time T1 (the oil cylinder starts to time) of the oil cylinder in the actual returning process is about 5 seconds (+ -10%). If T1 is less than 4.5 seconds, the oil cylinder retreating is abnormal because the oil cylinder speed is high and the rear limit fault is triggered by mistake, and then the control system outputs an alarm prompt and forbids the next flow action; if T1 is more than 4.5 seconds, the oil cylinder retreating is abnormal because the oil cylinder speed is low and the rear limit fault trigger is slow, and then the control system outputs an alarm prompt and forbids the next flow action; if T1 is more than 10 seconds (2T), the control system judges that the rear limit fault is not output or the oil cylinder has a fault, stops the oil cylinder action in order to avoid the expansion of the fault range, outputs an alarm prompt and forbids the next flow action.
The operation state of the coal charging car oil cylinder can be effectively monitored and the occurrence of oil cylinder damage accidents can be avoided by establishing front and rear limit chain protection measures for limiting 7 oil cylinders such as an ammonia water switching oil cylinder, a riser opening and closing oil cylinder, a dust removal connecting pipe oil cylinder, a dust collection cover, a coal feeding gate oil cylinder, an inner guide sleeve oil cylinder and an outer guide sleeve oil cylinder.
It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and all equivalent modifications and substitutions based on the above-mentioned technical solutions are within the scope of the present invention as defined in the claims.
Claims (4)
1. A method for protecting the limit of a coal charging car is characterized by comprising the following steps:
step 1), detecting a limit abnormal condition;
step 2) after the backward or forward movement instruction of the oil cylinder is sent, under the condition that a corresponding backward limit signal or a corresponding forward limit signal is not detected within a set time, the operation of a hydraulic system is immediately stopped if the oil cylinder is judged to be not moved due to no limit trigger or hydraulic fault, and an alarm display is carried out on an operator picture;
and 3) timing and monitoring the action process of the oil cylinder.
2. The method for protecting the coal charging car limit according to claim 1, wherein the step 1) of detecting the limit abnormal condition specifically comprises the following steps: the limit signals are accessed into a vehicle-mounted control system of the coal charging car, the states of the limits are monitored through a logic control program background, when the control system detects that the rear limit signal and the front limit signal arrive at the same time, the limit fault can be judged, an alarm signal is generated, and the next process action of the oil cylinder is forbidden.
3. The method for protecting the coal charging car limit according to claim 2, wherein the step 3) is used for monitoring the action process of the oil cylinder in a timing manner, and particularly, as the production of the coal charging car is cyclic and continuous, the operation time of the oil cylinder in each action process is basically constant in a normal production process, if the standard time of the ammonia water switching oil cylinder extending from the rear limit to the front limit is T, the operation time of the oil cylinder is timed in the production process, and if the actual operation time T1 from the rear limit to the front limit is greater than the standard time T, the abnormal condition can be judged, and the action of the next procedure is forbidden.
4. A spacing linkage mechanism, characterized in that, the linkage mechanism includes: the guide plate I and the guide plate II respectively play a role in fixing the shifting fork and the guide rod, and the limiting part is fixed on the limiting base through the limiting clamping block to receive displacement signals of the oil cylinder or the transmission mechanism transmitted by the guide rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811633538.0A CN111378459A (en) | 2018-12-29 | 2018-12-29 | Method for protecting coal charging car limiting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811633538.0A CN111378459A (en) | 2018-12-29 | 2018-12-29 | Method for protecting coal charging car limiting |
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| CN111378459A true CN111378459A (en) | 2020-07-07 |
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| CN201811633538.0A Pending CN111378459A (en) | 2018-12-29 | 2018-12-29 | Method for protecting coal charging car limiting |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1744404A (en) * | 2005-08-15 | 2006-03-08 | 南京风标经济科技有限公司 | Equipment limit intelligent control safety protecting system |
| CN202882009U (en) * | 2012-06-05 | 2013-04-17 | 中联重科股份有限公司 | Loading machine and oil cylinder limiting and protecting device and oil cylinder limiting and protecting system thereof |
| CN105425757A (en) * | 2015-12-29 | 2016-03-23 | 大连华锐重工焦炉车辆设备有限公司 | Intelligent coke oven car equipment control system and method |
| CN206422716U (en) * | 2016-12-22 | 2017-08-18 | 灵宝金源矿业股份有限公司 | A kind of oil cylinder limiting and protecting device |
| CN107859518A (en) * | 2017-10-23 | 2018-03-30 | 神华集团有限责任公司 | Coal-winning machine limiting and protecting device, method, storage medium and processor |
-
2018
- 2018-12-29 CN CN201811633538.0A patent/CN111378459A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1744404A (en) * | 2005-08-15 | 2006-03-08 | 南京风标经济科技有限公司 | Equipment limit intelligent control safety protecting system |
| CN202882009U (en) * | 2012-06-05 | 2013-04-17 | 中联重科股份有限公司 | Loading machine and oil cylinder limiting and protecting device and oil cylinder limiting and protecting system thereof |
| CN105425757A (en) * | 2015-12-29 | 2016-03-23 | 大连华锐重工焦炉车辆设备有限公司 | Intelligent coke oven car equipment control system and method |
| CN206422716U (en) * | 2016-12-22 | 2017-08-18 | 灵宝金源矿业股份有限公司 | A kind of oil cylinder limiting and protecting device |
| CN107859518A (en) * | 2017-10-23 | 2018-03-30 | 神华集团有限责任公司 | Coal-winning machine limiting and protecting device, method, storage medium and processor |
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Application publication date: 20200707 |