CN101628692A - Moment limiter for mini engineering crane - Google Patents
Moment limiter for mini engineering crane Download PDFInfo
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- CN101628692A CN101628692A CN200910063457A CN200910063457A CN101628692A CN 101628692 A CN101628692 A CN 101628692A CN 200910063457 A CN200910063457 A CN 200910063457A CN 200910063457 A CN200910063457 A CN 200910063457A CN 101628692 A CN101628692 A CN 101628692A
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- 238000004804 winding Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 15
- 230000006870 function Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
The invention relates to a moment limiter for mini engineering cranes, comprising a power supply, a data acquisition unit, a data processing unit, a data display unit and a control unit; in the data acquisition unit, a hydraulic sensor, an angle sensor and an arm length sensor, which are arranged at corresponding positions of a small-sized engineering crane, are connected with an input circuit; in the data processing unit, a single chip computer is connected with a memory, and is also connected with the input circuit; in the data display unit, a display is connected with the single chip computer; in the control unit, a control device is connected with the single chip computer through an output circuit, so as to raise the alarm and control the oil path of the mini engineering crane according to instructions from the single chip computer; a signal wire of a lifting limiting switch of a lifting limiting system is connected with the control device through a coil box, and after the lifting limiting switch is turned off, the control device raises the alarm and carries out limiting control. The invention solves the problem of safety of the mini engineering crane, and has the advantages of simple structure, high precision and low cost.
Description
Technical field
The present invention relates to a kind of hoisting crane safety guard, particularly a kind of limiter of moment that is used for mini engineering crane.
Background technology
Mini engineering crane is (as 3～12 car hosits, wheel-mounted crane, crawler crane etc.) little because of volume, maneuverability, low price, be widely used in building engineering field, but this type of mini engineering crane does not have special-purpose limiter of moment, the loading display instrument often only has been installed, the radical function of loading display instrument is to show that the weight of article that hoisting crane hangs is for operator's reference, do not have overloading automatic alarm, safety protection functions such as automatic protection and automatic guidance, the environment for use of crane is complicated unusually, various safety hazard exist everywhere, therefore exist serious safety in production hidden danger; The volume of limiter of moment is big, cost is too high, it can't be directly used in mini engineering crane and big-and-middle-sized crane is used.
Summary of the invention
Technical matters to be solved by this invention provides a kind of moment limiter for mini engineering crane, and it has solved the safety problem of mini engineering crane, and is simple in structure, and precision height, cost are low.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of moment limiter for mini engineering crane, comprise power supply, data acquisition unit, data processing unit, data display unit and control unit, wherein:
In the data acquisition unit, the hydraulic pressure transducer, angular transducer and the brachium sensor that are installed in the mini engineering crane corresponding site respectively are connected input circuit;
In the data processing unit, micro controller system is connected with memory device, and micro controller system is connected with input circuit;
In the data display unit, telltale is connected with micro controller system;
In the control unit, control setup is connected with micro controller system by output circuit, report to the police and the oil circuit of mini engineering crane is controlled according to the instruction of micro controller system, the signal wire (SW) of the limit switch that hoists of caging system of hoisting is connected with control setup through winding box, and control setup can be reported to the police and be carried out spacing control after the limit switch closure that hoists.
Outside barrel diameter＜the 270mm of brachium sensor.
The quantity of hydraulic pressure transducer is one, is installed on the master cylinder of mini engineering crane amplitude oil cylinder.
In the control setup, annunciator is connected with micro controller system by driving circuit and control chip, the electromagnetic valve that hoists is connected with micro controller system by driving circuit and control chip, the amplification electromagnetic valve is connected with micro controller system by driving circuit and control chip, and the signal wire (SW) of the limit switch that hoists of the caging system that hoists is connected with the electromagnetic valve that hoists through winding box and annunciator.
Advantage of the present invention is as follows:
1, survey precision height, the loading display instrument has only hydraulic pressure transducer, can only measure weight, and the present invention has hydraulic pressure transducer, angular transducer and brachium sensor, can measure weight, the elevation angle and brachium parameter simultaneously;
2, multiple functional, the loading display instrument has only the loading Presentation Function; And the present invention not only has the loading Presentation Function, also has overload, super moment and the spacing auto alarm that hoists, protects and the automatic guidance function automatically.
3, volume is little, at the characteristics of mini engineering crane, the brachium sensor is improved, and has reduced the volume of brachium sensor;
4, simple in structure, cost is low, existing big-and-middle-sized hoisting crane has two with the hydraulic pressure transducer of limiter of moment, be contained in respectively on the main oil pocket and secondary oil pocket of amplitude oil cylinder, and hydraulic pressure transducer of the present invention has only one, be contained on the main oil pocket of amplitude oil cylinder, reduced cost; Existing big-and-middle-sized crane hoisting caging system and limiter of moment are system independently separately, and present invention includes hoist spacing, the warning that hoists in the caging system of mini engineering crane, both shared brachium lines, annunciator and the electromagnetic valve etc. that hoists, not only simplify the structure, also reduced cost.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is schematic circuit diagram of the present invention;
Fig. 2 is a circuit structure diagram of the present invention;
Fig. 3 is that hydraulic pressure transducer of the present invention is installed on the scheme drawing on the master cylinder of mini engineering crane.
The specific embodiment
As depicted in figs. 1 and 2, the present invention includes power supply 1, data acquisition unit 2, data processing unit 3, data display unit 4 and control unit 5, wherein:
In the data acquisition unit 2, the hydraulic pressure transducer, angular transducer and the brachium sensor that are installed in the mini engineering crane corresponding site respectively are connected input circuit;
In the data processing unit 3, micro controller system is connected with memory device, and micro controller system is connected with input circuit, stores data handing and control program in the memory device;
In the data display unit 4, telltale is connected with micro controller system;
In the control unit 5, control setup is connected with micro controller system by output circuit, report to the police and the oil circuit of mini engineering crane is controlled according to the instruction of micro controller system, the signal wire (SW) of the limit switch that hoists of caging system of hoisting is connected with control setup through winding box, and control setup can be reported to the police and be carried out spacing control after the limit switch closure that hoists.
In the control setup, annunciator is connected with micro controller system by driving circuit and control chip, the electromagnetic valve that hoists is connected with micro controller system by driving circuit and control chip, the amplification electromagnetic valve is connected with micro controller system by driving circuit and control chip, and the signal wire (SW) of the limit switch that hoists of the caging system that hoists is connected with the electromagnetic valve that hoists through winding box 8 and annunciator.
As shown in Figure 3, the quantity of hydraulic pressure transducer 7 is one, is installed on the master cylinder of mini engineering crane amplitude oil cylinder 6, the oil pressure when being used to monitor mini engineering crane and hoisting in the main oil pocket of amplitude oil cylinder 6.
The brachium sensor is installed on the basic arm of hoisting crane because of used backguy is few, and external form is less relatively, its outside barrel diameter＜270mm, and the reel structure pattern has two kinds: built-in and external.
Angular transducer is installed in the basic arm root place of hoisting crane, is used to monitor the angle variation of basic arm.
Principle of work of the present invention is as follows:
Hydraulic pressure transducer, angular transducer and the brachium sensor acquisition that is installed in the mini engineering crane corresponding site respectively to the machine performance parameter constantly be sent to micro controller system through input circuit, micro controller system is under the control of memory device internal program, according to detected machine performance parameter in machine performance parameter of setting before the work and the work, retrieve the load of the maximum that allows under the mechanical current state that is pre-stored in the memory, as standard, with detected actual load and its relatively, thus the mode of operation of judging machinery safety whether.
If mini engineering crane operation in safe range, the green light that micro controller system can be controlled in the control setup is lighted; If machine performance parameter actual value reach with current state under the maximum load that allows differed 10% o'clock, micro controller system can be controlled the alarm equipment alarm in the control setup; When if this actual value reaches the maxim of permission, micro controller system can be controlled in the control setup amber light and light, simultaneously, micro controller system can be controlled hoist electromagnetic valve and/or the action of amplification electromagnetic valve in the control setup, oil circuit to mini engineering crane is controlled, and at this moment, the hoisting crane action that increases moment side (increasing the hoisting crane hazardous side) is all stopped automatically, can only reduce the action of moment side (increasing the crane safety side), thereby can make crane job be returned to safe condition; When if this actual value surpasses the maxim that allows, micro controller system can be controlled in the control setup red light and light, and simultaneously, micro controller system can be controlled hoist electromagnetic valve and/or the action of amplification electromagnetic valve in the control setup, oil circuit to mini engineering crane is controlled, and the result is the same in control.
Hoist the limit switch of caging system usually under the effect of weight, and limit switch disconnects, and control setup is not worked; If it is too high that the gib head of mini engineering crane rises, then weight can be lifted, and makes the limit switch closure, alarm equipment alarm, simultaneously, the electromagnetic valve that hoists action is unloaded oil sump tank with the lifting motor oil of mini engineering crane, at this moment, hoisting stops, and can only put down the operation of suspension hook.
Claims (4)
1, a kind of moment limiter for mini engineering crane comprises power supply (1), data acquisition unit (2), data processing unit (3), data display unit (4) and control unit (5), it is characterized in that:
In the data acquisition unit (2), the hydraulic pressure transducer, angular transducer and the brachium sensor that are installed in the mini engineering crane corresponding site respectively are connected input circuit;
In the data processing unit (3), micro controller system is connected with memory device, and micro controller system is connected with input circuit;
In the data display unit (4), telltale is connected with micro controller system;
In the control unit (5), control setup is connected with micro controller system by output circuit, report to the police and the oil circuit of mini engineering crane is controlled according to the instruction of micro controller system, the signal wire (SW) of the limit switch that hoists of caging system of hoisting is connected with control setup through winding box, and control setup can be reported to the police and be carried out spacing control after the limit switch closure that hoists.
2, a kind of moment limiter for mini engineering crane according to claim 1 is characterized in that: the outside barrel diameter＜270mm of brachium sensor.
3, a kind of moment limiter for mini engineering crane according to claim 1 is characterized in that: the quantity of hydraulic pressure transducer (7) is one, is installed on the master cylinder of mini engineering crane amplitude oil cylinder (6).
4, a kind of moment limiter for mini engineering crane according to claim 1, it is characterized in that: in the control setup, annunciator is connected with micro controller system by driving circuit and control chip, the electromagnetic valve that hoists is connected with micro controller system by driving circuit and control chip, the amplification electromagnetic valve is connected with micro controller system by driving circuit and control chip, and the signal wire (SW) of the limit switch that hoists of the caging system that hoists is connected with the electromagnetic valve that hoists through winding box (8) and annunciator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910063457A CN101628692A (en) | 2009-08-06 | 2009-08-06 | Moment limiter for mini engineering crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910063457A CN101628692A (en) | 2009-08-06 | 2009-08-06 | Moment limiter for mini engineering crane |
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| Publication Number | Publication Date |
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| CN101628692A true CN101628692A (en) | 2010-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910063457A Pending CN101628692A (en) | 2009-08-06 | 2009-08-06 | Moment limiter for mini engineering crane |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267662A (en) * | 2011-05-23 | 2011-12-07 | 上海三一科技有限公司 | Three-dimensional moment limiter of crane and crane comprising same |
| CN102363509A (en) * | 2011-11-01 | 2012-02-29 | 大连科信起重电器有限公司 | Outer climbing protection device of tower crane |
| CN102963827A (en) * | 2012-11-02 | 2013-03-13 | 宜昌市创星电子技术发展有限公司 | Tower crane safety management system |
| CN103086285A (en) * | 2013-01-21 | 2013-05-08 | 三一帕尔菲格特种车辆装备有限公司 | Tipping prevention device, engineering machinery and tipping prevention method |
| CN103171973A (en) * | 2013-03-28 | 2013-06-26 | 辽宁抚挖重工机械股份有限公司 | Main hook hoisting method under tower type work condition of crawler crane |
| CN103323166A (en) * | 2013-07-09 | 2013-09-25 | 中联重科股份有限公司 | Engineering machine and torque limiting method and torque limiting system thereof |
| CN104340894A (en) * | 2014-09-03 | 2015-02-11 | 广西柳工机械股份有限公司 | Hoisting machinery moment protection system and automatic working condition recognition method |
-
2009
- 2009-08-06 CN CN200910063457A patent/CN101628692A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267662A (en) * | 2011-05-23 | 2011-12-07 | 上海三一科技有限公司 | Three-dimensional moment limiter of crane and crane comprising same |
| CN102363509A (en) * | 2011-11-01 | 2012-02-29 | 大连科信起重电器有限公司 | Outer climbing protection device of tower crane |
| CN102963827A (en) * | 2012-11-02 | 2013-03-13 | 宜昌市创星电子技术发展有限公司 | Tower crane safety management system |
| CN102963827B (en) * | 2012-11-02 | 2015-07-01 | 宜昌市创星电子技术发展有限公司 | Tower crane safety management system |
| CN103086285A (en) * | 2013-01-21 | 2013-05-08 | 三一帕尔菲格特种车辆装备有限公司 | Tipping prevention device, engineering machinery and tipping prevention method |
| CN103171973A (en) * | 2013-03-28 | 2013-06-26 | 辽宁抚挖重工机械股份有限公司 | Main hook hoisting method under tower type work condition of crawler crane |
| CN103171973B (en) * | 2013-03-28 | 2015-01-07 | 辽宁抚挖重工机械股份有限公司 | Main hook hoisting method under tower type work condition of crawler crane |
| CN103323166A (en) * | 2013-07-09 | 2013-09-25 | 中联重科股份有限公司 | Engineering machine and torque limiting method and torque limiting system thereof |
| CN103323166B (en) * | 2013-07-09 | 2015-10-28 | 中联重科股份有限公司 | Engineering machine and torque limiting method and torque limiting system thereof |
| CN104340894A (en) * | 2014-09-03 | 2015-02-11 | 广西柳工机械股份有限公司 | Hoisting machinery moment protection system and automatic working condition recognition method |
| CN104340894B (en) * | 2014-09-03 | 2017-01-18 | 广西柳工机械股份有限公司 | Hoisting machinery moment protection system and automatic working condition recognition method |
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Application publication date: 20100120 |