CN202829188U - Real-time monitoring and controlling protection device for hoisting steel wire rope of hoisting equipment - Google Patents
Real-time monitoring and controlling protection device for hoisting steel wire rope of hoisting equipment Download PDFInfo
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- CN202829188U CN202829188U CN 201220365160 CN201220365160U CN202829188U CN 202829188 U CN202829188 U CN 202829188U CN 201220365160 CN201220365160 CN 201220365160 CN 201220365160 U CN201220365160 U CN 201220365160U CN 202829188 U CN202829188 U CN 202829188U
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- pulling force
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Abstract
The utility model relates to a real-time monitoring and controlling protection device for a hoisting steel wire rope of hoisting equipment. A pressure-capacitance sensor is mounted below a base of a headframe head sheave, or a tension-capacitance sensor is mounted on a suspension system of the headframe head sheave; a mating transmitter is arranged beside the head sheave and transmits a voltage or current or digital signal reflecting a hoisting force of the steel wire rope to automatic control equipment; the automatic control equipment samples an operation cycle, calculates a practical appropriate stress value, calculates average stress according to the set cycle, and continuously compares the average stress with the appropriate stress value; when the appropriate stress value is less than the average stress and exceeds 20%, the rope is loosened; when the appropriate stress value is greater than the average stress and exceeds 20%, accident stress stretching appears; the automatic control equipment is interlocked with a safety circuit; and when the rope is loosened or the accident stress stretching appears, the safety circuit is disconnected to achieve loosened rope protection or accident stress stretching protection, and a caution signal is sent out.
Description
Technical field
The utility model relates to the fields such as mine and building winding type lifting equipment hoisting cable slack rope commonly used or is haled Real-Time Monitoring and control protective unit when stretching.
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 protective device 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; amplified and automatically power value and setting value comparison that head sheave is suffered of comparator circuit by direct current; stressed during less than setting value when head sheave occurring, circuit output signal disconnects safety return circuit.The method setting value is that hoisting cable prolongs and is put into that the weight of steel rope is reflected in the pressure that bears on the head sheave when the longest.Its shortcoming: the method force transducer Application Range is less, and direct current amplifies, stability and the accuracy of comparator circuit are subjected to the circuit own characteristic, as temperature float, the impact of power line voltage stability etc. is obvious.
Paper 2: " Jiangsu coal " 1995 the 3rd phases are about the research of Global Rope Slack Protection Device for Hoisting Machines.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 the pulling force of steel rope to descend, therefore this scheme seals in the pulling force sensor of a highly reliable coefficient in container and steel rope junction, utilize the pulling force of microcomputer system continuous monitoring steel wire rope of hoist too little, thereby judge whether container occurs by the card accident.Be installed in the pulling force signal of the Single Chip Microcomputer (SCM) system Real-Time Monitoring steel rope on the winding cage.When gig normally moves, Fmin＜F (steel rope is stressed)＜Fmax is arranged, as lineoutofservice signal pull F during much smaller than Fmin, Single Chip Microcomputer (SCM) system will determine whether blocks tank slack rope fault this moment.If slack rope fault. will by the radio transmitting/receiving system signal be delivered to the ground hoist house immediately.Judge that through logic the rear drive actuating unit stops, and realizes rope creep protection.The method is 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 be subjected to 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 are in the middle of two stage casings of pit shaft, as misoperation occurring because of force transducer and signal handling equipment, keep in repair extremely inconveniently, will badly influence the normal operation of lifting means.
Published utility model patent: the one, utilize the modes such as travel switch, inductive switch, infrared detector, mechanical lever to detect the sagging distance of steel wire rope looseness between lifting means cylinder and the head sheave; to judge that steel rope is normal operation or slack rope, reaches the purpose of rope creep 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 head sheave to steel rope between 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 head sheave to steel rope between the cylinder; and can not be detected discovery, there is the protection dead band.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of Real-Time Monitoring and control protective unit of lifting means hoisting cable.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of Real-Time Monitoring of lifting means hoisting cable and control protective unit, comprise headgear pulley, setting pressure-capacitance-type sensor, pressure-inductive pickoff or pressure-electromagnetic senser under the base of described headgear pulley are perhaps installed pulling force-capacitance-type sensor, pulling force-inductive pickoff or pulling force-electromagnetic senser in the suspension of described headgear pulley; Dispose supporting transmitter at the headgear pulley side, transmitter will reflect that the voltage of rope hoisting power or current signal or digital signal send the input interface passage of PLC or single chip microcomputer or other automatic control device to; PLC or single chip microcomputer or other automatic control device automatically carry out the A/D conversion, calculate, compare, to cycle of run sampling and the actual in good time stress value of calculating, press setting cycle and calculate the mean forced value, carry out continuously the mean forced value 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 unexpected stressed stretching phenomenon to occur.
Described 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 unexpected stressed stretching phenomenon occurring; PLC or single chip microcomputer or other automatic control device 7 disconnect safety return circuit; realize rope creep protection or unexpected stressed stretching protection; and send alarm signal; carry out simultaneously circuit state and keep, after the manual confirmation event solves, by manual reversion control loop normal condition.
Described under the base of headgear pulley setting pressure-capacitance-type sensor, pressure-inductive pickoff or pressure-electromagnetic senser, be applicable to hoisting capacity more than or equal to 3 tons lifting means; Described suspension 13 at headgear pulley is installed pulling force-capacitance-type sensor 14, pulling force-inductive pickoff or pulling force-electromagnetic senser, is applicable to hoisting capacity less than 5 tons lifting means.
Described PLC or single chip microcomputer or other automatic control device 7 are supporting with display equipment, show the head sheave stressing conditions in good time, help the field staff to judge the safe condition of cage or skip bucket.
The beneficial effects of the utility model are:
1, this device can be realized slack rope and unexpected Tensile Real Time Monitoring and automatically protection in the lifting means operation global extent, guarantees the lifting means safe operation.
2, this device can surmount setting regions from the only force transducer of reselection procedure and hoisting force according to on-the-spot mounting condition and hoisting cable and lifting container.
When 3, lifting means normally moved, the in good time gauge pressure value of automatic control device such as PLC or single chip microcomputer or other and fixed cycle (such as 10 execution cycles of computing machine) aviation value error were 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 in good time sampling of the 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 the automatic control devices such as PLC or single chip microcomputer sampling computing value changes greatly and be responsive.The automatic control device such as PLC or single chip microcomputer running velocity is very fast, can realize sampling within the extremely short time, detect, differentiates to control.Simultaneously, the automatic control device such as PLC or single chip microcomputer good stability.The automatic control devices such as this PLC or single chip microcomputer both can share (expanding 2 analog input interface channels) with automatic control devices such as existing lifting means control computing machine or single chip microcomputers; also can join in addition small PLC or micro controller system or other automatic control device and realize sampling, contrast and output control signal; the lifting means safe operation is guaranteed in Real Time Monitoring and automatically protection.
4, this device can show the head sheave stressing conditions, and the lifting means safe operation is guaranteed in Real Time Monitoring and automatically protection.
Description of drawings
Below in conjunction with drawings and Examples the utility model 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 in the suspension of headgear pulley.
Fig. 3 is that the utility model is to the schematic block diagram of hoisting cable Real Time Monitoring and automatic protection.
The specific embodiment
Embodiment 1 is shown in Fig. 1,3: a kind of Real-Time Monitoring of lifting means hoisting cable and control protective unit, 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 that the voltage of steel rope 2 hoisting forcees or current signal or digital signal send the input interface passage of PLC or single chip microcomputer or other automatic control device 7 to; PLC or single chip microcomputer automatic control device 7 automatically carry out A/D conversion, calculate, relatively, to the cycle of run sampling with calculate actual in good time stress value, press setting cycle and calculate the mean forced value, carry out continuously mean forced value and in good time stress value relatively, judgement; 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 unexpected stressed stretching phenomenon to occur.
Described 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 unexpected stressed stretching phenomenon occurring; PLC or single chip microcomputer or other automatic control device 7 disconnect safety return circuit; realize rope creep protection or unexpected stressed stretching protection; the alarm bell that automatically sounds simultaneously lights slack rope signal lamp 9 or unexpected stressed stretch signal lamp 10 is reported to the police.
Carry out simultaneously circuit state and keep, after the manual confirmation event solves, recover the control loop normal condition by manually pressing the button 11.
Described at headgear pulley base 3 times setting pressure-capacitance-type sensors, pressure-inductive pickoff or pressure-electromagnetic sensers, be applicable to hoisting capacity more than or equal to 3 tons lifting means; Described 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.
Described 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 unexpected stressed stretching phenomenon to occur.
Embodiment 3 is as shown in Figure 2: Real-Time Monitoring and the control protective unit of embodiment 1 described a kind of lifting means hoisting cable; when the lifting means hoisting capacity less than 5 ton hours, in the suspension 13 of headgear pulley pulling force-capacitance-type sensor 14 or pulling force-inductive pickoff or pulling force-electromagnetic senser are installed.All the other are identical with embodiment 1.
Claims (3)
1. the Real-Time Monitoring of a lifting means hoisting cable and control protective unit, comprise the steel rope (2) of walking around headgear pulley (1), it is characterized in that: setting pressure-capacitance-type sensor (4) between the base (3) of described headgear pulley (1) and derrick panel (5), pressure-inductive pickoff or pressure-electromagnetic senser or pressure-resistive transducer are perhaps installed pulling force-capacitance-type sensor (14) in the suspension (13) of described headgear pulley (1), pulling force-inductive pickoff or pulling force-electromagnetic senser or pressure-resistive transducer; Dispose supporting transmitter (6) at headgear pulley (1) side, transmitter (6) will reflect that the voltage of rope hoisting power or current signal or digital signal send the input interface passage of PLC or single chip microcomputer or other automatic control device (7) to.
2. the according to claim 1 Real-Time Monitoring of described a kind of lifting means hoisting cable and control protective unit, it is characterized in that: described base at headgear pulley (3) lower setting pressure-capacitance-type sensor, pressure-inductive pickoff or pressure-electromagnetic senser are applicable to hoisting capacity more than or equal to 3 tons lifting means; Described suspension at headgear pulley (13) is installed pulling force-capacitance-type sensor (14), pulling force-inductive pickoff or pulling force-electromagnetic senser, is applicable to hoisting capacity less than 5 tons lifting means.
3. the according to claim 1 Real-Time Monitoring of described a kind of lifting means hoisting cable and control protective unit; it is characterized in that: described 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220365160 CN202829188U (en) | 2012-07-26 | 2012-07-26 | Real-time monitoring and controlling protection device for hoisting steel wire rope of hoisting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220365160 CN202829188U (en) | 2012-07-26 | 2012-07-26 | Real-time monitoring and controlling protection device for hoisting steel wire rope of hoisting equipment |
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| Publication Number | Publication Date |
|---|---|
| CN202829188U true CN202829188U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220365160 Expired - Lifetime CN202829188U (en) | 2012-07-26 | 2012-07-26 | Real-time monitoring and controlling protection device for hoisting steel wire rope of hoisting equipment |
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| Country | Link |
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| CN (1) | CN202829188U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111751135A (en) * | 2020-06-24 | 2020-10-09 | 开滦（集团）有限责任公司电信分公司 | Remote monitoring, supervision and intelligent fault diagnosis system for elevator group |
-
2012
- 2012-07-26 CN CN 201220365160 patent/CN202829188U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111751135A (en) * | 2020-06-24 | 2020-10-09 | 开滦（集团）有限责任公司电信分公司 | Remote monitoring, supervision and intelligent fault diagnosis system for elevator group |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |