CN104386600A - Moment limiter - Google Patents
Moment limiter Download PDFInfo
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- CN104386600A CN104386600A CN201410469312.7A CN201410469312A CN104386600A CN 104386600 A CN104386600 A CN 104386600A CN 201410469312 A CN201410469312 A CN 201410469312A CN 104386600 A CN104386600 A CN 104386600A
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- Prior art keywords
- module
- data processing
- moment
- display
- alarm
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/88—Safety gear
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a moment limiter, which comprises a data processing module, a weighing module, an angle measurement module, a parameter setting module, a display module and an alarm module. The parameter setting module sets rated parameters of the system, and transfers the rated parameters to the display module and the data processing module. The data processing module processes a weight signal of the weighing module and an angle signal of the angle measurement module, compares the data obtained by processing with a rated load to judge whether the system operates normally, and transfers the current work load to the display module to display in real time. The alarm module monitors the judgement signal of the data processing module in real time. The moment limiter provided by the invention is designed directed at crane industry safety protection devices, compared with the moment limit products currently available on the market, has the advantages of high performance, low cost, complete safety protection function, flexible and simple debugging and operation, etc., and can be applied to marine environment.
Description
Technical field
The present invention relates to elevator machinery field, be specifically related to a kind of limiter of moment.
Background technology
Arm derrick crane needs often to change operating mode according to field condition and carries out hoisting operation, hang as changed and carry angle etc., and the work luffing lifted by crane under different operating mode and maximum load rating are different, therefore a set of safety device is needed to carry out comprehensive monitoring judgement to above parameter, real-time display hoisting crane normally works, be fully loaded with, overload, luffing surpasses the upper limit, luffing surpasses the mode of operations such as lower limit, and carry out corresponding warning, prompting, control, to ensure crane safety work.
For this reason, arm derrick crane is all furnished with limiter of moment as safety guard, according to the mode of operation of hoisting crane reality, according to specific load curve, automatically moment restriction is carried out to hoisting crane, prevent the dangerous play of hoisting crane.Therefore, limiter of moment product is a kind of important safety guard on lifting equipment, has promulgated that since " crane torque limiter technical specification of security ", limiter of moment speed of development in is in recent years very fast from State Bureau of Technical Supervision.The history of China's designed, designed, production limiter of moment is not long, limiter of moment on market mostly is external product, although these external product Performance comparision are advanced, but it is too high to there is cost, procurement cycle is longer, the defects such as production debugging service is inconvenient, and a lot of core technology of these products is secret, is unfavorable for that the feature for different crane products carries out Function Extension.
Existing limiter of moment many employings Single Chip Microcomputer (SCM) system realizes, namely with performance-oriented eight or 16-bit single-chip processor for monitoring core, provide text, Graphic State to point out by charactron or LCD Liquid Crystal Display to operator.The major defect of the program is: extensibility is poor, time-to-market is long, debugging is complicated.In view of the important safety effect of limiter of moment, some main equipments are needed to adjust accordingly according to field experiment result usually, to verify its functional reliability.Although emulator can be used or develop with brassboard, but use emulator or brassboard just to demonstrate the feasibility of hardware and software, do not represent can reliability application in industrial control system because industrial control system is very high to jamproof requirement.
Summary of the invention
To be solved by this invention is that traditional limiter of moment extensibility is poor, and time-to-market is long, the technical matters that debugging is complicated.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is to provide a kind of limiter of moment, comprise data processing module, Weighing module, Angle Measurement Module, parameter setting module, display module and alarm module, the nominal parameter of described parameter setting module to system sets, and described nominal parameter is passed to described display module and described data processing module, the angle signal of described data processing module to the weight signal of described Weighing module and described Angle Measurement Module processes, described in the data obtain process, rated load compares, judge whether this system normally works, and current working load is passed in real time the display of described display module, the judgement signal of data processing module described in described alarm module real-time listening.
In technique scheme, also comprise data memory module, described data memory module is for storing the next described weight signal of described data processing module transmission and described angle signal, and the processing data of described data processing module.
In technique scheme, described alarm module can set out when hoisting crane abnomal condition vision and the dual alarm of sound, and occurs with alarm list and rolling warning two kinds of patterns on display module.
Limiter of moment provided by the invention is the design carried out for Crane Industry safety guard; more existing moment limits product have that High Performance, low cost, safety protection function are complete, debugging and the advantage such as flexible operation is simple, and can marine environment be applied to.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of limiter of moment provided by the invention;
Fig. 2 is the schematic diagram of setting parameter provided by the invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in Figure 1, limiter of moment provided by the invention comprises major and minor hook pulling force sensor, jib angular transducer and control unit and display unit.
Major and minor hook pulling force sensor is separately positioned on major and minor hook, and jib angular transducer is arranged on jib, and control unit and display unit are arranged in operator's compartment.
As shown in Figure 1, control unit is provided with hoisting crane performance perameter table, parameter setting module, Weighing module, comparison module, control module and alarm module.
What preserve in hoisting crane performance perameter table is the rated load data of hoisting crane under different operating mode, and these rated load data meet the requirement of " the crane torque limiter technical specification of security " that State Bureau of Technical Supervision promulgates according to the design parameters of hoisting crane.
Parameter setting module is for setting the nominal parameter of weight-lifting equipment safe operation, and the object of parameters setting module is according to adjusting the field condition of hoisting crane.
Weighing module according to major and minor hook pulling force sensor Real-time Collection to major and minor hook pulling force and jib angular transducer Real-time Collection to jib angle calculation obtain under current working real-time load (moment).
Rated load under the current working of preserving in real-time load and hoisting crane performance perameter table compares by comparison module, obtains the judged result whether hoisting crane current working is safe.
Control module sends corresponding control signal according to above-mentioned judged result, and the safety device on hoisting crane produces corresponding action according to corresponding control signal.Such as: when judged result shows that current working is in a safe condition, safety device is failure to actuate; When judged result shows that current working is in unsafe condition, safety device action, controls the braking of major and minor elevator or off-load process.
Alarm module, according to corresponding control signal, sends alerting signal, trigger alarm indicator lamp or voice guard, and alarm message is on the display unit with alarm list and rolling warning two kinds of pattern displays.
What display unit adopted is fine resolution touch-screen, can show working status parameter and the rated load parameter of current hoisting crane in real time.
Wherein, load cell and angular transducer all have employed high-precision sensor, load cell synthesis precision is 0.1%, the precision of Weighing module is 0.05%, the precision of angular transducer is 0.01 degree, through experiment test, the whole synthesis precision of limiter of moment can up to positive and negative 1%, far away higher than in like product and professional standard positive and negative 5% synthesis precision requirement.
In the present invention, what preserve in hoisting crane performance perameter table is that the rated load data of hoisting crane under different operating mode are obtained by mathematical modeling and straightened up in place method, reaches combining of theory and practice, thus improves the accuracy of data.
Process is needed because limiter of moment has a large amount of design informations and Site Detection data, LOAD FOR algorithm is complicated and requirement of real-time is high, therefore, present invention employs quick storage search algorithm and carry out reduced data process load, by nonlinear fitting mode, the parameter such as jib angle and load in hoisting crane performance perameter table is converted to measures of dispersion according to being stored in a block data according to corresponding relation, PLC directly accesses relevant data block by designing program thus, then the rated load under different operating mode is asked for by simple algebraic manipulation, thus avoid numerous and diverse curve geometric formula calculating, greatly reduce system processing time.
Based on this, the present invention can the heavy-duty machine that induce of fast accurate hang the transient change power of carrying and producing, and most short response time is 50ms, and this index is far away higher than other like products.As can be seen here, the present invention to the overload protection of hoisting crane more in time, safety.
The present invention, be respectively equipped with data memory module at control unit and display unit: need store data mainly contain sensor detect real time data, arm derrick crane lifting performance table, debugging calibration and computed information result, there is black box function simultaneously.Display unit has download and the transmission that USB port and CF card slot are convenient to data.
Setting parameter is realized by display unit, even if with graphic control panel to operator data monitoring is provided and complete weigh, the demarcation of the sensor such as angle, calibration function, as shown in Figure 2, the integrated configuration software of touch panel device, the several functions such as button, indicator lamp can be realized, and touch-screen can carry out communication with PLC, related data can be sent to PLC control end in real time, completed by PLC program weigh, the demarcation of the sensor such as angle, calibration function.
Carry out setting parameter by the touch key-press on display unit, unit switches, be provided with authority classification and cipher protection function simultaneously, and the information such as load, swinging radius, principal arm angle, principal arm height, suspension hook of loop wheel machine can be shown in real time.Such as:
Percentage load: current work load accounts for the percentum of the safe working load under current angular;
Hook load: the load that the master/slave hook of current loop wheel machine promotes;
Safe working load: arrange according to Current mechanical construction parameter, loop wheel machine current angular lower maximum load that can promote;
Principal arm angle: the lifting angle that principal arm is current;
Swinging radius: the swinging radius under selecting according to current loop wheel machine configuration and operating mode;
Principal arm height: the height that current principal arm promotes;
Real work suspension hook: the actual suspension hook (master/slave hook) operated;
Operating mode: current operation mode (Personnel/Onboard/Offboard);
Wind speed: the wind speed of surveying work environment;
Wind direction: the wind direction of surveying work environment;
Bar graph depicting percent: the bar grid display of percentage load, intuitive display.
Limiter of moment provided by the invention is the design carried out for Crane Industry safety guard; more existing moment limits product have that High Performance, low cost, safety protection function are complete, debugging and the advantage such as flexible operation is simple, and can marine environment be applied to.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change made under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (3)
1. limiter of moment, it is characterized in that, comprise data processing module, Weighing module, Angle Measurement Module, parameter setting module, display module and alarm module, the nominal parameter of described parameter setting module to system sets, and described nominal parameter is passed to described display module and described data processing module, the angle signal of described data processing module to the weight signal of described Weighing module and described Angle Measurement Module processes, described in the data obtain process, rated load compares, judge whether this system normally works, and current working load is passed in real time the display of described display module, the judgement signal of data processing module described in described alarm module real-time listening.
2. limiter of moment as claimed in claim 1, it is characterized in that, also comprise data memory module, described data memory module is for storing the next described weight signal of described data processing module transmission and described angle signal, and the processing data of described data processing module.
3. limiter of moment as claimed in claim 1, is characterized in that, described alarm module can set out when hoisting crane abnomal condition vision and the dual alarm of sound, and occurs with alarm list and rolling warning two kinds of patterns on display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410469312.7A CN104386600A (en) | 2014-09-15 | 2014-09-15 | Moment limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410469312.7A CN104386600A (en) | 2014-09-15 | 2014-09-15 | Moment limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104386600A true CN104386600A (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410469312.7A Pending CN104386600A (en) | 2014-09-15 | 2014-09-15 | Moment limiter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107628545A (en) * | 2017-11-01 | 2018-01-26 | 上海振华重工(集团)股份有限公司 | A kind of moment limiting system of offshore crane |
| CN109969960A (en) * | 2019-05-07 | 2019-07-05 | 广东工业大学 | A kind of crane load monitoring system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2267457C2 (en) * | 2003-12-01 | 2006-01-10 | Общество с ограниченной ответственностью "Научно-производственное предприятие "Резонанс" | Method of and device to protect load-lifting mechanism |
| CN101628694A (en) * | 2009-08-06 | 2010-01-20 | 宜昌市创星电子技术发展有限公司 | Novel moment limiter for crane |
| CN201458611U (en) * | 2009-08-06 | 2010-05-12 | 宜昌市创星电子技术发展有限公司 | Dual-redundancy load moment limiter for crane |
| CN201882830U (en) * | 2010-11-11 | 2011-06-29 | 徐州重型机械有限公司 | Anti-overturning moment limiter system and traveling crane |
-
2014
- 2014-09-15 CN CN201410469312.7A patent/CN104386600A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2267457C2 (en) * | 2003-12-01 | 2006-01-10 | Общество с ограниченной ответственностью "Научно-производственное предприятие "Резонанс" | Method of and device to protect load-lifting mechanism |
| CN101628694A (en) * | 2009-08-06 | 2010-01-20 | 宜昌市创星电子技术发展有限公司 | Novel moment limiter for crane |
| CN201458611U (en) * | 2009-08-06 | 2010-05-12 | 宜昌市创星电子技术发展有限公司 | Dual-redundancy load moment limiter for crane |
| CN201882830U (en) * | 2010-11-11 | 2011-06-29 | 徐州重型机械有限公司 | Anti-overturning moment limiter system and traveling crane |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107628545A (en) * | 2017-11-01 | 2018-01-26 | 上海振华重工(集团)股份有限公司 | A kind of moment limiting system of offshore crane |
| CN109969960A (en) * | 2019-05-07 | 2019-07-05 | 广东工业大学 | A kind of crane load monitoring system and method |
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Application publication date: 20150304 |
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