CN110955204A - Equipment fault interlocking system and method - Google Patents
Equipment fault interlocking system and method Download PDFInfo
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- CN110955204A CN110955204A CN201911102148.5A CN201911102148A CN110955204A CN 110955204 A CN110955204 A CN 110955204A CN 201911102148 A CN201911102148 A CN 201911102148A CN 110955204 A CN110955204 A CN 110955204A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
- G05B19/41875—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by quality surveillance of production
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/32—Operator till task planning
- G05B2219/32252—Scheduling production, machining, job shop
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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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- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Safety Devices In Control Systems (AREA)
Abstract
The invention provides an equipment fault interlocking system which comprises displacement, vibration and temperature sensors, wherein the signal output ends of the sensors are respectively connected with the signal input ends of a first fault reporting instrument and a second fault reporting instrument, the signal output ends of the first fault reporting instrument and the second fault reporting instrument are connected with the signal input end of a fourth AND gate, the signal output end of the fourth AND gate is connected with a jump-stop program of equipment, and a 1 setting signal is sent out when the displacement, vibration and temperature readings on the first fault reporting instrument and the second fault reporting instrument exceed threshold values. In the scheme, the signals of the two fault reporting instruments are associated with the tripping program of the equipment, and the tripping program of the equipment is started only when the two fault reporting instruments send 1-setting signals, so that the tripping of the equipment cannot be caused when a single fault reporting instrument is set to be 1 due to factors such as damage and interference of the instruments in the instrument control system, and the probability of misoperation and tripping of the equipment is greatly reduced.
Description
Technical Field
The invention relates to the field of equipment safety protection, in particular to an interlocking protection system during equipment failure.
Background
In the production and manufacturing process of a factory, parameters such as temperature, vibration, displacement and the like of important equipment are generally monitored, the parameters are interlocked with the start and stop of the equipment, and once the parameters exceed a threshold value, the equipment is in failure, and the equipment is in interlocked stop.
The stable operation of the equipment is very important to the efficiency of the production operation. In order to ensure the production efficiency, a plurality of devices need to continuously operate, and the frequent shutdown of some devices seriously influences the production efficiency. And partial large-scale equipment can be started only after being stopped for a long time, for example, once an oxygen production air compressor in the metallurgical industry has a stop fault, oxygen supply can be stopped for 4-5 hours, and the feeding production of a main process is directly influenced.
In the prior art, the interlocking control strategy of a common equipment manufacturer on equipment faults is mainly to protect an equipment body, and the importance of stable operation of the equipment on production is ignored. Many devices can be tripped due to protection misoperation caused by factors such as damage and interference of instruments in an instrument control system. When the equipment is stopped by misoperation, the equipment does not have a fault, and the production efficiency is seriously influenced only by stopping the equipment due to other factors, even other associated equipment is damaged.
Therefore, the problem of protection misoperation and tripping of the interlocking control system is solved, and the interlocking control system has important significance for protecting equipment and stabilizing production.
Disclosure of Invention
The invention aims to provide an equipment fault interlocking system and method for reducing the probability of equipment misoperation and halt.
The device fault interlocking system comprises displacement, vibration and temperature sensors, wherein the signal output ends of the sensors are respectively connected with the signal input ends of a first fault reporting instrument and a second fault reporting instrument, the signal output ends of the first fault reporting instrument and the second fault reporting instrument are connected with the signal input end of a fourth AND gate, the signal output end of the fourth AND gate is connected with a jump-stop program of a device, and signals of 1 are sent out when the displacement, vibration and temperature readings on the first fault reporting instrument and the second fault reporting instrument exceed threshold values.
In the scheme, the signals of the two fault reporting instruments are associated with the tripping program of the equipment, and the tripping program of the equipment is started only when the two fault reporting instruments send 1-setting signals, so that the tripping of the equipment cannot be caused when a single fault reporting instrument is set to be 1 due to factors such as damage and interference of the instruments in the instrument control system, and the probability of misoperation and tripping of the equipment is greatly reduced.
Drawings
FIG. 1 is a logic diagram of the invention.
Detailed Description
The signal output end of the sensor is respectively connected with the signal input ends of a first fault reporting instrument 11 and a second fault reporting instrument 12, the signal output ends of the first fault reporting instrument 11 and the second fault reporting instrument 12 are connected with the signal input end of a fourth AND gate 24, the signal output end of the fourth AND gate 24 is connected with a jump stop program of equipment, and a signal 1 is sent out when the displacement, vibration and temperature readings on the first fault reporting instrument 11 and the second fault reporting instrument 12 exceed threshold values.
The equipment fault interlocking system is mainly applied to fault interlocking of an air compressor, a sensor of the equipment fault interlocking system collects displacement, vibration and temperature signals of the air compressor and transmits the signals to a fault reporting instrument, so that the two fault reporting instruments respectively have independent measuring signals of the same measuring point on the air compressor, and then the signals of the two fault reporting instruments are related to a tripping program of equipment, so that the first and second fault reporting instruments 11 and 12 and the tripping program form a two-wire interlocking, the tripping program of the equipment is started when the first and second fault reporting instruments 11 and 12 in the two-wire interlocking are both set to be 1, the problem that the equipment can be tripped and stopped once the fault reporting instruments in the existing single-wire interlocking are set to be 1 due to factors such as damage and interference is avoided, and the scheme of the two-wire interlocking ensures that the equipment can be normally tripped and stopped when a fault occurs, and greatly reduces the probability of the misoperation and tripping of the equipment.
The signal input end of the fourth and gate 24 is connected with the signal output end of the first and gate 21, the signal input end of the first and gate 21 is connected with the signal output ends of the first and second interlock switching switches 31 and 32, and the signal output ends of the first and second interlock switching switches 31 and 32 are connected with the signal input end of the first and gate 21;
the signal output end of the first interlocking switching switch 31, the signal output end of the first fault reporting instrument 11 and the negation signal of the output end of the first AND gate 21 are connected with the signal input end of the second AND gate 22, and the signal output end of the second interlocking switching switch 32, the signal output end of the second fault reporting instrument 12 and the negation signal of the output end of the first AND gate 21 are connected with the signal input end of the third AND gate 23;
the signal output ends of the second, third and fourth and gates 22, 23 and 24 are connected with the jump stop program of the equipment through an or gate 40.
According to the scheme, switching between the double-line interlocking and the single-line interlocking is achieved through switching of the first interlocking switch 31 and the double-interlocking switch 32, when one line in the double-line interlocking fails, the line interlocking can be cut off, instruments on the line can be repaired and replaced, meanwhile, the other interlocking line and a tripping program of equipment form a complete interlocking system, when aging instruments in the two interlocking lines need to be replaced, the two interlocking lines can be sequentially replaced according to the steps, and at the moment, the interlocking lines can still be tripped and stopped if the equipment fails, so that the interlocking lines can be repaired without stopping.
An interlocking method of an equipment fault interlocking system comprises the following steps: A. setting the first and the second interlock switching switches 31 and 32 to 1, setting the first AND gate 21 to 1, setting the negation signal of the first AND gate 21 to 0, and setting the second and the third AND gates 22 and 23 connected with the negation signal of the first AND gate 21 to 0; B. the sensor collects the displacement, vibration and temperature parameters of the equipment, then transmits data to the first and second fault reporting instruments 11 and 12 to judge whether the parameters exceed a threshold value, judges whether the equipment stops according to output signals of the first and second fault reporting instruments 11 and 12, at the moment, the fourth AND gate 24 receives a 1 setting signal of the first AND gate 21, if the first and second fault reporting instruments 11 and 12 are both set to be 1, the fourth AND gate 24 is set to be 1, the OR gate 40 connected with the fourth AND gate is set to be 1, and the equipment stops jumping; if one or all of the first and second fault- reporting instruments 11 and 12 is/are set to 0, the fourth and gate 24 connected with the first and second fault-reporting instruments is set to 0, the or gate 40 connected with the first and second fault-reporting instruments is set, and the equipment continues to operate; C. when one of the first and second fault reporting instruments 11 and 12 is set to 1, the fault reporting instrument set to 1 is judged, the interlocking switching switch corresponding to the fault reporting instrument set to 1 is set to 0, the first and gate 21 is set to 0, the negation signal of the first and gate 21 is set to 1, the fourth and gate 24 is set to 0, the second and gate 22 or the third and gate 23 is set to 0 corresponding to the interlocking switching switch set to 0, the third and gate 23 or the second and gate 22 corresponding to the interlocking switching switch set to 1 receives the signal of setting to 1 of the interlocking switching switch and the signal of setting to 1 after negation of the first and gate 21, at this time, if the fault reporting instrument corresponding to 1 is set to 1 of the third and gate 23 or the second and gate 22, the or gate 40 connected with the third and gate 23 or the second and gate 22 is set to 1, and the equipment is tripped; D. and (4) overhauling and replacing the fault reporting instrument, and setting the corresponding interlocking switching switch 1.
In the scheme, when the first and second interlocking on-off switches 31 and 32 are both set to be 1, the interlocking system is double-line interlocking, and at the moment, the tripping program of the equipment can be started only when the first and second fault reporting instruments 11 and 12 in the double-line interlocking are both set to be 1, so that the air compressor can be normally tripped and stopped when a fault occurs, and the misoperation tripping of the air compressor caused by the fault of the fault reporting instruments is avoided. One of the first and second fault reporting instruments 11 and 12 is set to be 1, which means that the instrument set to be 1 is in fault and needs to be repaired and replaced, at the moment, the air compressor is maintained to normally operate, the interlocking switching switch corresponding to the fault instrument is cut off, the association between the corresponding interlocking line and the jump-stop program is cut off, the jump-stop program and the other intact interlocking line form single-line interlocking to protect the air compressor at the moment, after the fault line is repaired and replaced, the interlocking switching switch corresponding to the fault line is put in, and the jump-stop program of the air compressor is associated with the two interlocking lines again.
Claims (3)
1. An equipment fault interlock system, includes displacement, vibration and temperature sensor, its characterized in that: the signal output end of the sensor is respectively connected with the signal input ends of the first and second fault reporting instruments (11 and 12), the signal output ends of the first and second fault reporting instruments (11 and 12) are connected with the signal input end of a fourth AND gate (24), the signal output end of the fourth AND gate (24) is connected with a jump stop program of the equipment, and a signal 1 is sent out when displacement, vibration and temperature readings on the first and second fault reporting instruments (11 and 12) exceed threshold values.
2. The equipment fault interlock system of claim 1, wherein: the signal input end of the fourth AND gate (24) is connected with the signal output end of the first AND gate (21), the signal input end of the first AND gate (21) is connected with the signal output ends of the first and second interlock switching switches (31, 32), and the signal output ends of the first and second interlock switching switches (31, 32) are connected with the signal input end of the first AND gate (21);
the signal output end of the first interlocking switching switch (31), the signal output end of the first fault reporting instrument (11) and the negation signal of the output end of the first AND gate (21) are connected with the signal input end of the second AND gate (22), and the signal output end of the second interlocking switching switch (32), the signal output end of the second fault reporting instrument (12) and the negation signal of the output end of the first AND gate (21) are connected with the signal input end of the third AND gate (23);
and the signal output ends of the second, third and fourth AND gates (22, 23 and 24) are connected with a jump stop program of the equipment through an OR gate (40).
3. The interlocking method of the equipment failure interlocking system according to claim 2, comprising the steps of:
A. setting the first and the second interlock switching switches (31, 32) to 1, setting the first AND gate (21) to 1, setting the negation signal of the first AND gate (21) to 0, and setting the second and the third AND gates (22, 23) connected with the negation signal of the first AND gate (21) to 0;
B. the sensor collects displacement, vibration and temperature parameters of the equipment, then data are transmitted to the first and second fault reporting instruments (11 and 12) to judge whether the parameters exceed a threshold value or not, whether the equipment stops or not is judged according to output signals of the first and second fault reporting instruments (11 and 12), at the moment, the fourth AND gate (24) receives a signal of setting 1 of the first AND gate (21), if the first and second fault reporting instruments (11 and 12) are both set with 1, the fourth AND gate (24) is set with 1, the OR gate (40) connected with the fourth AND gate (24) is set with 1, and the equipment stops jumping; if one or all of the first and second fault-reporting instruments (11, 12) is/are set to 0, the fourth and gate (24) connected with the first and second fault-reporting instruments is set to 0, the or gate (40) connected with the first and second fault-reporting instruments is set, and the equipment continues to operate;
C. when one of the first and second fault reporting instruments (11, 12) is set to be 1, the fault reporting instrument set to be 1 is judged, the interlocking switching switch corresponding to the fault reporting instrument set to be 0, the first AND gate (21) is set to be 0, the negation signal of the first AND gate (21) is set to be 1, the fourth AND gate (24) is set to be 0, the second AND gate (22) or the third AND gate (23) is set to be 0 corresponding to the interlocking switching switch set to be 0, the third AND gate (23) or the second AND gate (22) corresponding to the interlocking switching switch set to be 1 receives the signal of the interlocking switching switch set to be 1 and the signal of the negation signal set to be 1 of the first AND gate (21), at the moment, if the fault reporting instrument corresponding to the fault reporting instrument set to be 1, the third AND gate (23) or the second AND gate (22) is set to be 1, the OR gate (40) connected with the fault reporting instrument set to be 1, and the equipment;
D. and (4) overhauling and replacing the fault reporting instrument, and setting the corresponding interlocking switching switch 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911102148.5A CN110955204B (en) | 2019-11-12 | 2019-11-12 | Equipment fault interlocking system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911102148.5A CN110955204B (en) | 2019-11-12 | 2019-11-12 | Equipment fault interlocking system and method |
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| CN110955204A true CN110955204A (en) | 2020-04-03 |
| CN110955204B CN110955204B (en) | 2023-02-24 |
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| JPH0898350A (en) * | 1994-09-26 | 1996-04-12 | Nissin Electric Co Ltd | Faulty point orientating equipment of gas insulating switchgear |
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| JP2005108085A (en) * | 2003-10-01 | 2005-04-21 | Kuroda Precision Ind Ltd | Interlock device |
| WO2010075690A1 (en) * | 2008-12-31 | 2010-07-08 | 广东省电力设计研究院 | Electronic switch control module of nuclear power plant |
| CN201570787U (en) * | 2009-10-13 | 2010-09-01 | 河南森源电气股份有限公司 | Five-prevention interlocking device for fixed switch cabinets |
| JP2013143806A (en) * | 2012-01-10 | 2013-07-22 | Toyota Motor Corp | On-vehicle interlock device |
| CN203366107U (en) * | 2013-07-22 | 2013-12-25 | 国家电网公司 | Multi-motor interlock protection system |
| CN103472795A (en) * | 2013-09-11 | 2013-12-25 | 江苏永钢集团有限公司 | Device and method for reducing instrument control mistaken interlocking |
| CN103995154A (en) * | 2014-05-08 | 2014-08-20 | 南通中远船务自动化有限公司 | Connecting device for rapid instrument verification of electric welding machine |
| CN104091221A (en) * | 2014-04-11 | 2014-10-08 | 中国石油化工股份有限公司 | SIL assessment unit for safety instrument system |
| CN204086977U (en) * | 2014-10-15 | 2015-01-07 | 南京化工职业技术学院 | A kind of interlock alarm system based on sensor fault diagnosis technology |
-
2019
- 2019-11-12 CN CN201911102148.5A patent/CN110955204B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS581248A (en) * | 1981-06-27 | 1983-01-06 | Fujitsu Ltd | Control system for interlock condition |
| JPH0898350A (en) * | 1994-09-26 | 1996-04-12 | Nissin Electric Co Ltd | Faulty point orientating equipment of gas insulating switchgear |
| JP2003127497A (en) * | 2001-10-18 | 2003-05-08 | Kyocera Corp | Interlock control circuit |
| JP2005108085A (en) * | 2003-10-01 | 2005-04-21 | Kuroda Precision Ind Ltd | Interlock device |
| WO2010075690A1 (en) * | 2008-12-31 | 2010-07-08 | 广东省电力设计研究院 | Electronic switch control module of nuclear power plant |
| CN201570787U (en) * | 2009-10-13 | 2010-09-01 | 河南森源电气股份有限公司 | Five-prevention interlocking device for fixed switch cabinets |
| JP2013143806A (en) * | 2012-01-10 | 2013-07-22 | Toyota Motor Corp | On-vehicle interlock device |
| CN203366107U (en) * | 2013-07-22 | 2013-12-25 | 国家电网公司 | Multi-motor interlock protection system |
| CN103472795A (en) * | 2013-09-11 | 2013-12-25 | 江苏永钢集团有限公司 | Device and method for reducing instrument control mistaken interlocking |
| CN104091221A (en) * | 2014-04-11 | 2014-10-08 | 中国石油化工股份有限公司 | SIL assessment unit for safety instrument system |
| CN103995154A (en) * | 2014-05-08 | 2014-08-20 | 南通中远船务自动化有限公司 | Connecting device for rapid instrument verification of electric welding machine |
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| CN110955204B (en) | 2023-02-24 |
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