CN102785978A - Method for real-time monitoring and control protection of hoisting rope of hoisting equipment - Google Patents
Method for real-time monitoring and control protection of hoisting rope of hoisting equipment Download PDFInfo
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- CN102785978A CN102785978A CN2012102612056A CN201210261205A CN102785978A CN 102785978 A CN102785978 A CN 102785978A CN 2012102612056 A CN2012102612056 A CN 2012102612056A CN 201210261205 A CN201210261205 A CN 201210261205A CN 102785978 A CN102785978 A CN 102785978A
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Abstract
The invention relates to a method for real-time monitoring and control protection of hoisting rope of hoisting equipment. A pressure-capacitance type sensor is mounted on the lower portion of a base of a headgear pulley, or a tension-capacitance type sensor is mounted on a suspension system of the headgear pulley; a matched transducer is equipped on one side of the headgear pulley; the transducer transmits voltage, current or a digital signal used for reflecting the hoisting power of a steel wire rope to automatic control equipment; the automatic control equipment samples an operational cycle and calculates the practical timely stress value, calculates the stress average value according to the set cycle, and continuously compares the stress average value with the timely stress value; when the timely stress value is smaller than the stress average value and is by over 20%, the fact that the steel wire rope is loosened is considered; when the timely stress value is larger than the stress average value and is by over 20%, the fact that the steel wire rope is drawn due to accidental stress is considered; and the automatic control equipment is interlocked with a safety circuit, when the steel wire rope is loosened or drawn due to accidental stress, the safety circuit is switched off, so that the rope loosening protection or accidental stress drawing protection is realized, and a warning signal is given out.
Description
Technical field
The present invention relates to fields such as mine and building winding type lifting equipment hoisting cable slack rope commonly used or haled the method for monitoring and control protection when stretching in real time.
Background technology
When the winding type lifting equipment of mine and building field moved, hoisting cable slack rope or quilt are haled to stretch tended to cause serious accident, and many technical papers and patent have proposed the method for protection to this.
Paper 1: " Fen coal science and technology " the 3rd phase of nineteen ninety lifting winch rope creep protection is discussed; Author's history one proposes clearly: the resistance strain gage force transducer is installed under the head sheave base; Detect the stressed variation of head sheave; Amplify the power value and setting value comparison automatically that head sheave is suffered by direct current with comparator circuit, stressed during when head sheave occurring less than setting value, circuit output signal disconnection safety return circuit.This method setting value is that hoisting cable prolongs and is put into the pressure that the weight of steel rope when the longest is reflected on the head sheave to be born.Its shortcoming: this method force transducer selects for use scope less, and direct current amplifies, the stability and the accuracy of comparator circuit receive the circuit own characteristic, as temperature float, the influence of power line voltage stability etc. is obvious.
Paper 2: " Jiangsu coal " /> 1995 the 3rd phases are about the research of the omnidistance rope creep protection device of gig.The little gentle king of author Yuan proposes on the sunny side: when lifting container is stuck; Must relax with one section steel rope of container junction; Thereby cause pull of steel wire to descend; Therefore this scheme seals in the pulling force sensor of a highly reliable coefficient in container and steel rope junction, utilizes microcomputer system continuous monitoring gig pull of steel wire too little, thereby judges whether container takes place by the card accident.The SCM system that is installed on the winding cage is monitored the pull of steel wire signal in real time.When gig normally moves, Fmin is arranged, and < < Fmax, as lineoutofservice signal pull F during much smaller than Fmin, SCM system will determine whether card jar slack rope fault takes place this moment to F (steel rope is stressed).If slack rope fault. will through the radio transmittingreceiving system signal be delivered to the ground hoist house immediately.Stop through logic determines rear drive actuating unit, realize rope creep protection.This method is that force transducer is installed in hoisting cable and is raised between the container.The structure of this force transducer needs particular design, to guarantee the safety of lifting means.This force transducer and signal handling equipment working environment are relatively moist and be easy to receive foreign object to bump to pound and the soda acid aqueous corrosion, and the stability of its work is affected.In operational process, when particularly force transducer and signal handling equipment were in the middle of two stage casings of pit shaft, as misoperation occurring because of force transducer and signal handling equipment, maintenance was extremely inconvenient, with the normal operation that badly influences lifting means.
Disclosed utility model patent
:The one, utilize modes such as travel switch, inductive switch, infrared detector, mechanical lever to detect the lax sagging distance of steel rope between lifting means cylinder and the head sheave, be normal operation or slack rope to judge steel rope, reach the purpose of slack rope protection.The 2nd, utilize steel rope linear differential on cylinder steel rope rope stretching linear velocity and the head sheave, judge slack rope, reach the purpose of rope creep protection.The defective of above-mentioned patented technology scheme is: if steel rope weight is much larger than steel rope between head sheave to the cylinder between head sheave and the lifting thing; Slack rope will appear at head sheave and promote between the thing; And relaxation does not appear in steel rope between head sheave to the cylinder; And can not to be detectedly find, there is the protection dead band.
Summary of the invention
The technical matters that the present invention will solve provides a kind of method of real-time monitoring and control protection of lifting means hoisting cable.
For solving the problems of the technologies described above; Technical scheme of the present invention is: the method for a kind of real-time monitoring of lifting means hoisting cable and control protection; Comprise headgear pulley; Setting pressure-capacitance-type sensor, pressure-inductive pickoff or pressure-electromagnetic senser under the base of said headgear pulley are perhaps installed pulling force-capacitance-type sensor, pulling force-inductive pickoff or pulling force-electromagnetic senser on the suspension of said headgear pulley; Dispose supporting transmitter at the head sheave side, transmitter will reflect voltage or the current signal of rope hoisting power or the input interface passage that digital signal sends PLC or single chip microcomputer or other automatic control device to; PLC or single chip microcomputer or other automatic control device carry out the A/D conversion automatically, calculate, compare; To cycle of run sampling and the actual stress value in good time of calculating; Press setting cycle and calculate the mean forced value, carry out the mean forced value continuously and compare, judge with in good time stress value; When in good time stress value less than the mean forced value and when surmounting 10%-50%, think slack rope to occur; When in good time stress value greater than the mean forced value and when surmounting 10%-50%, think that accident occurring receives the tensile phenomenon.
Said PLC or single chip microcomputer or other automatic control device 7 are interlocked with the safety return circuit of elevator system; When slack rope or accident occurring and receive the tensile phenomenon, PLC or single chip microcomputer or other automatic control device break off safety return circuit, realize that rope creep protection or accident receive tensile protection; And send alarm signal; Carry out circuit state simultaneously and keep, treat that artificial affirmation incident solves after, by manual reversion control loop normal condition.
Said under the headgear pulley base setting pressure-capacitance-type sensor, pressure-inductive pickoff or pressure-electromagnetic senser, be applicable to that hoisting capacity is more than or equal to 3 tons lifting means; Said pulling force-capacitance-type sensor, pulling force-inductive pickoff or the pulling force-electromagnetic senser on the suspension of headgear pulley, installed is applicable to that hoisting capacity is less than 5 tons lifting means.
Said PLC or single chip microcomputer or other automatic control device and display equipment are supporting, show the head sheave stressing conditions in good time, help the field staff to judge the safe condition of cage or skip bucket.
The invention has the beneficial effects as follows:
1,This method can realize in the lifting means operation global extent slack rope and accident stretched monitoring in real time with protect automatically.
2, can surmount regions from only force transducer of reselection procedure and hoisting force according to on-site installation condition and hoisting cable and lifting container.
When 3, lifting means normally moved, in good time gauge pressure value of automatic control devices such as PLC or single chip microcomputer and fixed cycle (like 10 execution cycles of computing machine) aviation value error was very little, can realize highly sensitive computational discrimination.Simultaneously, temperature, humidity and power line voltage drift, and sensor parameters drift do not exert an influence to the sampling in good time of automatic control devices such as PLC or single chip microcomputer, computing and judgement.When slack rope or cage, skip bucket etc. occurring and blocked steel rope and stretch, the stressed sudden change of head sheave institute is obvious, and automatic control devices such as PLC or single chip microcomputer sampling computing value changes greatly and be responsive.Automatic control device such as PLC or single chip microcomputer running velocity is very fast, can in the extremely short time, realize sampling, detecting, differentiate control.Simultaneously, automatic control device such as PLC or single chip microcomputer good stability.Automatic control devices such as this PLC or single chip microcomputer both can with automatic control devices shared (expanding 2 analog quantity input interface passages) such as existing lifting means control computer or single chip microcomputer, also can join small PLC or micro controller system or other automatic control device in addition and realize sampling, contrast and output control signal.
4, this method can show in good time head sheave stressing conditions.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is the structural representation of setting pressure sensor under the base of headgear pulley.
Fig. 2 is the structural representation that pulling force sensor is installed on the suspension of headgear pulley.
Fig. 3 is that the present invention is to hoisting cable monitoring in real time and the schematic block diagram of protecting automatically.
The specific embodiment
Embodiment 1Like Fig. 1, shown in 3: the method for a kind of real-time monitoring of lifting means hoisting cable and control protection; The base 3 of headgear pulley 1 is installed on pressure-capacitance-type sensor 4 or pressure-inductive pickoff or the pressure-electromagnetic senser; Pressure-capacitance-type sensor 4 is installed on the derrick panel 5; Dispose supporting transmitter 6 at headgear pulley 1 side, transmitter 6 will reflect voltage or the current signal of steel rope 2 hoisting forcees or the input interface passage that digital signal sends PLC or single chip microcomputer or other automatic control device 7 to; PLC or single chip microcomputer or other automatic control device 7 carry out the A/D conversion automatically, calculate, compare; To cycle of run sampling and the actual stress value in good time of calculating; Press setting cycle and calculate the mean forced value, carry out the mean forced value continuously and compare, judge with in good time stress value; When in good time stress value less than the mean forced value and when surmounting 20%, think slack rope to occur; When in good time stress value greater than the mean forced value and when surmounting 20%, think that accident occurring receives the tensile phenomenon.
Said PLC or single chip microcomputer or other automatic control device 7 are interlocked with the safety return circuit of elevator system; When slack rope or accident occurring and receive the tensile phenomenon; PLC or single chip microcomputer or other automatic control device 7 break off safety return circuit; Realize that rope creep protection or accident receive tensile protection, the alarm bell that sounds automatically simultaneously lights slack rope signal lamp 9 or unexpected stressed stretch signal lamp 10 is reported to the police.
Carry out circuit state simultaneously and keep, treat that artificial affirmation incident solves after, press the button 11 by manual work and recover the control loop normal conditions.
Said base 3 times setting pressure-capacitance-type sensors, pressure-inductive pickoff or pressure-electromagnetic sensers at headgear pulley are applicable to that hoisting capacity is more than or equal to 3 tons lifting means; Said PLC or single chip microcomputer or other automatic control device 7 are supporting with display equipment 8, show headgear pulley 1 stressing conditions in good time, help the field staff to judge the safe condition of cage or skip bucket.
Said PLC or single chip microcomputer or other automatic control device 7, display equipment 8, slack rope signal lamp 9, unexpected stressed stretch signal lamp 10 and button 11 all are installed in the control housing 12.
Embodiment 2:For different lifting means, embodiment 1 is described to be adjustable as when in good time stress value: less than the mean forced value and when surmounting 30%, think slack rope to occur; When in good time stress value greater than the mean forced value and when surmounting 30%, think that accident occurring receives the tensile phenomenon.
Embodiment 3As shown in Figure 2
:The method of the real-time monitoring of embodiment 1 described a kind of lifting means hoisting cable and control protection; When the lifting means hoisting capacity less than 5 ton hours, pulling force-capacitance-type sensor 14 or pulling force-inductive pickoff or pulling force-electromagnetic senser are installed on the suspension 13 of headgear pulley.All the other are identical with embodiment 1.
Claims (3)
1. the method for the real-time monitoring of a lifting means hoisting cable and control protection; Comprise the steel rope (2) of walking around headgear pulley (1); It is characterized in that: setting pressure-capacitance-type sensor (4), pressure-inductive pickoff or pressure-electromagnetic senser pressure-resistive transducer between the base (3) of said headgear pulley (1) and derrick panel (5), perhaps go up pulling force-capacitance-type sensor (14), pulling force-inductive pickoff or pulling force-electromagnetic senser or pressure-resistive transducer are installed in the suspension (13) of said headgear pulley; Dispose supporting transmitter (6) at headgear pulley (1) side, transmitter (6) will reflect voltage or the current signal of rope hoisting power or the input interface passage that digital signal sends PLC or single chip microcomputer automatic control device (7) to; PLC or single chip microcomputer automatic control device (7) carry out the A/D conversion automatically, calculate, compare; To cycle of run sampling and the actual stress value in good time of calculating; Press setting cycle and calculate the mean forced value, carry out the mean forced value continuously and compare, judge with in good time stress value; When in good time stress value less than the mean forced value and when surmounting 10%-50%, think slack rope to occur; When in good time stress value greater than the mean forced value and when surmounting 10%-50%, think that accident occurring receives the tensile phenomenon;
Said PLC or single chip microcomputer automatic control device (7) are interlocked with the safety return circuit of elevator system; When slack rope or accident occurring and receive the tensile phenomenon, PLC or single chip microcomputer automatic control device (7) break off safety return circuit, realize that rope creep protection or accident receive tensile protection; And send alarm signal; Carry out circuit state simultaneously and keep, treat that artificial affirmation incident solves after, by manual reversion control loop normal condition.
2. the method for protecting according to the real-time monitoring and the control of the said a kind of lifting means hoisting cable of claim 1; It is characterized in that: said base at headgear pulley (3) is setting pressure-capacitance-type sensor, pressure-inductive pickoff or pressure-electromagnetic senser down, is applicable to that hoisting capacity is more than or equal to 3 tons lifting means; Said suspension at headgear pulley (13) go up to be installed pulling force-capacitance-type sensor (14), pulling force-inductive pickoff or pulling force-electromagnetic senser, is applicable to that hoisting capacity is less than 5 tons lifting means.
3. the method for protecting according to the real-time monitoring and the control of the said a kind of lifting means hoisting cable of claim 1; It is characterized in that: said PLC or single chip microcomputer or other automatic control device (7) are supporting with display equipment (8); Show the head sheave stressing conditions in good time, help the field staff to judge the safe condition of cage or skip bucket.
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| CN2012102612056A CN102785978A (en) | 2012-07-26 | 2012-07-26 | Method for real-time monitoring and control protection of hoisting rope of hoisting equipment |
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| CN2012102612056A CN102785978A (en) | 2012-07-26 | 2012-07-26 | Method for real-time monitoring and control protection of hoisting rope of hoisting equipment |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407853A (en) * | 2013-08-27 | 2013-11-27 | 闫丰伟 | Cage blocking alarming system of hoist |
| CN104754291A (en) * | 2013-12-30 | 2015-07-01 | ***通信集团公司 | Electronic adhesive tape and article monitoring method |
| CN104965055A (en) * | 2015-06-04 | 2015-10-07 | 中国矿业大学(北京) | On-line detection and safety assessment method and system for mining steel wire rope |
| CN105217394A (en) * | 2015-10-13 | 2016-01-06 | 广州广日电梯工业有限公司 | Based on elevator pine disconnected rope real-time monitoring device and the method for curent change process |
| CN105712139A (en) * | 2014-12-03 | 2016-06-29 | 日立电梯（中国）有限公司 | Lift control method |
| CN105785204A (en) * | 2016-05-13 | 2016-07-20 | 中国船舶重工集团公司第七0四研究所 | Steel wire rope looseness detection sensor device |
| CN106087025A (en) * | 2016-08-21 | 2016-11-09 | 无锡鸿运电镀有限公司 | Possesses the Electroplating Rack of plating arm tensile force monitoring |
| CN106629282A (en) * | 2017-01-25 | 2017-05-10 | 唐山创通科技有限公司 | Device for monitoring lifting operation state of lifting equipment through cell phone |
| CN108508445A (en) * | 2018-06-29 | 2018-09-07 | 成都瑞嘉和科技有限公司 | A kind of detection device that Yellow phosphorus furnace load-bearing steel cable loosens |
| CN108750850A (en) * | 2018-06-27 | 2018-11-06 | 杨荣泰 | A kind of Cargo Lift cable safety monitoring system |
| CN110308252A (en) * | 2019-08-13 | 2019-10-08 | 成都苏杜地质工程咨询有限公司 | Tunnel toxic and harmful gas deep hole test equipment and its test method |
| CN111285234A (en) * | 2020-02-20 | 2020-06-16 | 中国矿业大学 | Elevator load monitoring system and method based on fiber bragg grating technology |
| CN111547622A (en) * | 2020-04-28 | 2020-08-18 | 南京中船绿洲机器有限公司 | Method for calculating load weight of marine crane |
| CN111835149A (en) * | 2020-07-20 | 2020-10-27 | 洛阳洛信矿山机器有限公司 | Mine hoisting system health state monitoring method based on main shaft measuring point strain |
| CN108508445B (en) * | 2018-06-29 | 2024-06-04 | 成都瑞嘉和科技有限公司 | Detection device for loosening bearing steel rope of yellow phosphorus furnace |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1157795A (en) * | 1996-09-28 | 1997-08-27 | 福州大学 | Operating mode optimization method for friction drawing system and its stochastic monitoring apparatus |
| CN200967700Y (en) * | 2006-10-31 | 2007-10-31 | 周荣刚 | Safety control device during mine car running process |
| CN201567177U (en) * | 2009-09-23 | 2010-09-01 | 中煤第三建设（集团）有限责任公司 | Overload protection system for wire ropes of sinking winche |
| CN101941624A (en) * | 2010-08-25 | 2011-01-12 | 中国矿业大学 | Method for detecting operation troubles of mine hoist |
| JP2011195293A (en) * | 2010-03-19 | 2011-10-06 | Hitachi Building Systems Co Ltd | Main rope tension measuring device of elevator |
| CN102556874A (en) * | 2011-12-17 | 2012-07-11 | 陈桂晖 | Looseness-preventing rope protection device of steel wire rope used for crane |
-
2012
- 2012-07-26 CN CN2012102612056A patent/CN102785978A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1157795A (en) * | 1996-09-28 | 1997-08-27 | 福州大学 | Operating mode optimization method for friction drawing system and its stochastic monitoring apparatus |
| CN200967700Y (en) * | 2006-10-31 | 2007-10-31 | 周荣刚 | Safety control device during mine car running process |
| CN201567177U (en) * | 2009-09-23 | 2010-09-01 | 中煤第三建设（集团）有限责任公司 | Overload protection system for wire ropes of sinking winche |
| JP2011195293A (en) * | 2010-03-19 | 2011-10-06 | Hitachi Building Systems Co Ltd | Main rope tension measuring device of elevator |
| CN101941624A (en) * | 2010-08-25 | 2011-01-12 | 中国矿业大学 | Method for detecting operation troubles of mine hoist |
| CN102556874A (en) * | 2011-12-17 | 2012-07-11 | 陈桂晖 | Looseness-preventing rope protection device of steel wire rope used for crane |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407853A (en) * | 2013-08-27 | 2013-11-27 | 闫丰伟 | Cage blocking alarming system of hoist |
| CN104754291A (en) * | 2013-12-30 | 2015-07-01 | ***通信集团公司 | Electronic adhesive tape and article monitoring method |
| CN104754291B (en) * | 2013-12-30 | 2018-02-23 | ***通信集团公司 | A kind of electric adhesive tape and article monitoring method |
| CN105712139A (en) * | 2014-12-03 | 2016-06-29 | 日立电梯（中国）有限公司 | Lift control method |
| CN105712139B (en) * | 2014-12-03 | 2018-04-03 | 日立电梯（中国）有限公司 | A kind of elevator control method |
| CN104965055A (en) * | 2015-06-04 | 2015-10-07 | 中国矿业大学(北京) | On-line detection and safety assessment method and system for mining steel wire rope |
| CN105217394B (en) * | 2015-10-13 | 2018-02-02 | 广州广日电梯工业有限公司 | The disconnected rope real-time monitoring device of elevator pine and method based on curent change processing |
| CN105217394A (en) * | 2015-10-13 | 2016-01-06 | 广州广日电梯工业有限公司 | Based on elevator pine disconnected rope real-time monitoring device and the method for curent change process |
| CN105785204A (en) * | 2016-05-13 | 2016-07-20 | 中国船舶重工集团公司第七0四研究所 | Steel wire rope looseness detection sensor device |
| CN105785204B (en) * | 2016-05-13 | 2018-10-30 | 中国船舶重工集团公司第七0四研究所 | A kind of steel wire rope looseness detection sensor device |
| CN106087025A (en) * | 2016-08-21 | 2016-11-09 | 无锡鸿运电镀有限公司 | Possesses the Electroplating Rack of plating arm tensile force monitoring |
| CN106629282A (en) * | 2017-01-25 | 2017-05-10 | 唐山创通科技有限公司 | Device for monitoring lifting operation state of lifting equipment through cell phone |
| CN108750850A (en) * | 2018-06-27 | 2018-11-06 | 杨荣泰 | A kind of Cargo Lift cable safety monitoring system |
| CN108750850B (en) * | 2018-06-27 | 2020-10-02 | 福州思琪科技有限公司 | Goods lift cable safety monitoring system |
| CN108508445A (en) * | 2018-06-29 | 2018-09-07 | 成都瑞嘉和科技有限公司 | A kind of detection device that Yellow phosphorus furnace load-bearing steel cable loosens |
| CN108508445B (en) * | 2018-06-29 | 2024-06-04 | 成都瑞嘉和科技有限公司 | Detection device for loosening bearing steel rope of yellow phosphorus furnace |
| CN110308252A (en) * | 2019-08-13 | 2019-10-08 | 成都苏杜地质工程咨询有限公司 | Tunnel toxic and harmful gas deep hole test equipment and its test method |
| CN111285234A (en) * | 2020-02-20 | 2020-06-16 | 中国矿业大学 | Elevator load monitoring system and method based on fiber bragg grating technology |
| CN111547622A (en) * | 2020-04-28 | 2020-08-18 | 南京中船绿洲机器有限公司 | Method for calculating load weight of marine crane |
| CN111835149A (en) * | 2020-07-20 | 2020-10-27 | 洛阳洛信矿山机器有限公司 | Mine hoisting system health state monitoring method based on main shaft measuring point strain |
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Application publication date: 20121121 |