CN103323166B - Engineering machinery and moment method for limiting thereof and moment limiting system - Google Patents
Engineering machinery and moment method for limiting thereof and moment limiting system Download PDFInfo
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- CN103323166B CN103323166B CN201310285632.2A CN201310285632A CN103323166B CN 103323166 B CN103323166 B CN 103323166B CN 201310285632 A CN201310285632 A CN 201310285632A CN 103323166 B CN103323166 B CN 103323166B
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Abstract
The invention discloses a kind of engineering machinery and moment method for limiting thereof and moment limiting system, this moment method for limiting, comprising: use signal processing apparatus to process the moment inspecting signal that moment measuring device sends; If what described moment measuring device sent is non-super torque signals, then described signal processing apparatus sends the signal of predetermined expression non-super moment; If what described moment measuring device sent is super torque signals, then described signal processing apparatus sends the signal that predetermined expression surpasses moment; If controller does not receive the predetermined expression non-super torque signals of described signal processing apparatus transmission or super torque signals within the time period of setting, then described controller sends corresponding safeguard measure signal.Prevent artificially to the use of the change harm engineering machinery of limiter of moment external cabling.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly a kind of engineering machinery and moment method for limiting thereof and moment limiting system.
Background technology
Limiter of moment is widely used in engineering machinery, is used for the whether super equipment of work machine to limit moment and run.
As shown in Figure 1, existing a kind of limiter of moment is made up of single open moment measuring device, the input point Xn of controller is connected to after the normally closed series connection of two limit switches of pick-up unit inside, when normal load works, the signal that Xn place detects is high ordinary mail number, represents in logic with " 1 "; When super moment load runs; two of limiter of moment or one of them normally closed disconnection; the signal that now Xn point detects becomes low level, represents in logic with " 0 ", takes corresponding measure to protect the safe operation of tower machine after controller detects low ordinary mail number according to program.
The shortcoming that prior art exists: owing to being open devices, artificially can change its inner setting or structure very easily, thus affect the accuracy of detection of limiter of moment.Even if the inside not changing limiter of moment is arranged or structure, only need artificial at controller signals input " short circuit " limiter of moment signal, controller by long-term receipt to high ordinary mail number, acquiescence tower machine is in safe operation state by system always, easily cause the violation overload operation that tower machine is regular, if things go on like this, structural member is caused to damage, the safe handling of harm tower machine.
Summary of the invention
Technical purpose of the present invention is to provide a kind of engineering machinery and moment method for limiting thereof and moment limiting system, effectively can prevent the use of artificially limiter of moment external cabling being changed to harm engineering machinery.
The invention provides a kind of moment method for limiting, comprising:
Signal processing apparatus is used to process the moment inspecting signal that moment measuring device sends; If what described moment measuring device sent is non-super torque signals, then described signal processing apparatus sends the signal of predetermined expression non-super moment; If what described moment measuring device sent is super torque signals, then described signal processing apparatus sends the signal that predetermined expression surpasses moment;
If controller does not receive the predetermined expression non-super torque signals of described signal processing apparatus transmission or super torque signals within the time period of setting, then described controller sends corresponding safeguard measure signal.
The invention provides a kind of moment limiting system, comprise limiter of moment and controller, described limiter of moment comprises moment measuring device and signal processing apparatus;
The moment inspecting signal that described signal processing apparatus sends for the treatment of described moment measuring device; If what described moment measuring device sent is non-super torque signals, then described signal processing apparatus sends the signal of predetermined expression limiter of moment non-super moment; If what described moment measuring device sent is super torque signals, then described signal processing apparatus sends the signal that predetermined expression limiter of moment surpasses moment;
If described controller does not receive the predetermined expression non-super torque signals of described limiter of moment transmission or super torque signals within the time period of setting, then described controller sends corresponding safeguard measure signal.
The invention provides a kind of engineering machinery, comprise described moment limiting system.
The present invention is by increasing the signal processing apparatus that can process moment inspecting signal in limiter of moment inside; if controller does not receive the predetermined expression non-super torque signals of described signal processing apparatus transmission or super torque signals within the time period of setting; then described controller sends corresponding safeguard measure signal, thus prevents artificially to the use of the change harm engineering machinery of limiter of moment external cabling.
Accompanying drawing explanation
Fig. 1 is the structural drawing of a kind of moment limiting system in prior art;
Fig. 2 is the structural drawing of embodiment of the present invention moment limiting system.
Embodiment
For making those skilled in the art more clearly understand the present invention, do more detailed description below in conjunction with accompanying drawing, but these explanations are not limited to protection scope of the present invention.Embodiment of the present invention moment method for limiting, comprising: use signal processing apparatus to process the moment inspecting signal that moment measuring device sends; If what described moment measuring device sent is non-super torque signals, then described signal processing apparatus sends the signal of predetermined expression non-super moment; If what described moment measuring device sent is super torque signals, then described signal processing apparatus sends the signal that predetermined expression surpasses moment; If controller does not receive the predetermined expression non-super torque signals of described signal processing apparatus transmission or super torque signals within the time period of setting, then described controller sends corresponding safeguard measure signal.By increasing signal processing apparatus in limiter of moment inside; if controller does not receive the predetermined expression non-super torque signals of described signal processing apparatus transmission or super torque signals within the time period of setting; then described controller sends corresponding safeguard measure signal, effectively can prevent the use of artificially limiter of moment external cabling being changed to harm engineering machinery.
Preferably, described signal processing device is set to pulser.
When described moment measuring device send be non-super torque signals time, the signal of the predetermined expression limiter of moment non-super moment that described pulser sends is continuous print pulse signal, and wherein the turn-off time of individual pulse is less than the limiter of moment detection signal time-delay action of setting.Wherein, the predetermined way of described continuous print pulse signal includes but not limited to: the quantity of umber of pulse, interval time, array configuration.
When described moment measuring device send be super torque signals time, the signal that described pulser sends is the signal of the limiter of moment detection signal time-delay action being more than or equal to setting.
The embodiment of the present invention provides a kind of moment limiting system, comprise limiter of moment and controller, described limiter of moment comprises moment measuring device and signal processing apparatus, the moment inspecting signal that described signal processing apparatus sends for the treatment of described moment measuring device; If what described moment measuring device sent is non-super torque signals, then described signal processing apparatus sends the signal of predetermined expression limiter of moment non-super moment; If what described moment measuring device sent is super torque signals, then described signal processing apparatus sends the signal that predetermined expression limiter of moment surpasses moment.If described controller does not receive the non-super torque signals of described limiter of moment transmission or super torque signals within the time period of setting, then represent that fault has appearred in limiter of moment, described controller sends corresponding safeguard measure signal.By increasing signal processing apparatus in limiter of moment inside; if controller does not receive the predetermined expression non-super torque signals of described signal processing apparatus transmission or super torque signals within the time period of setting; then described controller sends corresponding safeguard measure signal, can effectively prevent " short circuit " and " not connecing " artificially changed limiter of moment external cabling from changing the use of harm engineering machinery.
In another embodiment, described limiter of moment takes overall package, externally only leaves wiring interface, thus prevents the artificial change to limiter of moment inside.
Limiter of moment of the present invention goes for various engineering machinery, comprises hoisting machinery, concreting machinery etc., illustrates below for tower machine, and wherein said signal processing apparatus adopts pulser.
As shown in Figure 2, in the present embodiment, limiter of moment comprises two parts, moment measuring device and pulser, after field adjustable is suitable, limiter of moment is packaged, prevents other staff from arbitrarily changing.
Described moment measuring device comprises the limit switch group (in the present embodiment, limit switch group comprises two limit switches) be made up of at least one limit switch, in moment measuring device, normally closed some signal of the limit switch of limit switch group delivers to pulser after connecting, and is delivered to the input point Xn of controller after pulser process input signal.; When non-super moment, the signal that described moment measuring device sends is high level signal; When super moment, at least one the normally closed disconnection in described limit switch group, the signal that described moment measuring device sends is low level signal.
Pulser take processor as the drive unit of core, following function can be realized: pulser is in on-state under normal circumstances by programming, be equivalent to short circuit, at set intervals (such as, definition time is 10 minutes), pulser turns off with regard to continuous print, connect several, and this number of times can define arbitrarily, now, the signal that the input point Xn of controller detects will be continuous print pulse signal.In order to prevent controller misoperation, the turn-off time of individual pulse should be less than the limiter of moment detection signal time-delay action of setting (such as, if limiter of moment detection signal time-delay action is 0.2 second, then the turn-off time of individual pulse signal should be less than 0.2 second).
In order to strengthen the ability that limiter of moment is prevented cracking, the transmission of pulse can be arranged between controller and pulser, receive agreement, such as, can the agreement such as quantity, interval time, array configuration of number of pulses, if controller receive impulse form and agreement send impulse form the same, then identification limiter of moment working properly, instead of substitute by other pulser, otherwise, assert that limiter of moment is abnormal.
When tower machine normally works, within the time period of setting, occur that following any situation all represents that limiter of moment is working properly: one, receive the continuous print pulse signal of limiter of moment setting; Its two, receive and surpass torque signals from limiter of moment, namely the input point Xn of controller receives the >=low level signal of 0.2s.If any one not occurring in above-mentioned two situations within the time period of setting, represents that fault has appearred in limiter of moment, this fault may be that limiter of moment self damages, and also may be that limiter of moment is by artificial destruction.When system judges that fault has appearred in limiter of moment, controller can be wanted to send corresponding safeguard measure signal by program setting, such as, shut down.After failture evacuation, tower machine recovers normal and runs.
The present invention also provides a kind of engineering machinery, comprises described moment limiting system.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a moment method for limiting, is characterized in that, comprising:
Signal processing apparatus is used to process the moment inspecting signal that moment measuring device sends; If what described moment measuring device sent is non-super torque signals, then described signal processing apparatus sends the signal of predetermined expression non-super moment; If what described moment measuring device sent is super torque signals, then described signal processing apparatus sends the signal that predetermined expression surpasses moment;
If controller does not receive the predetermined expression non-super torque signals of described signal processing apparatus transmission or super torque signals within the time period of setting, then described controller sends corresponding safeguard measure signal.
2. moment method for limiting according to claim 1, is characterized in that, described signal processing device is set to pulser.
3. moment method for limiting according to claim 2, it is characterized in that, when described moment measuring device send be non-super torque signals time, the signal of the predetermined expression limiter of moment non-super moment that described pulser sends is continuous print pulse signal, and wherein the turn-off time of individual pulse is less than the limiter of moment detection signal time-delay action of setting; When described moment measuring device send be super torque signals time, the signal that described pulser sends is the signal of the limiter of moment detection signal time-delay action being more than or equal to setting.
4. a moment limiting system, is characterized in that, comprises limiter of moment and controller, and described limiter of moment comprises moment measuring device and signal processing apparatus;
The moment inspecting signal that described signal processing apparatus sends for the treatment of described moment measuring device; If what described moment measuring device sent is non-super torque signals, then described signal processing apparatus sends the signal of predetermined expression limiter of moment non-super moment; If what described moment measuring device sent is super torque signals, then described signal processing apparatus sends the signal that predetermined expression limiter of moment surpasses moment;
If described controller does not receive the predetermined expression non-super torque signals of described limiter of moment transmission or super torque signals within the time period of setting, then described controller sends corresponding safeguard measure signal.
5. moment limiting system according to claim 4, is characterized in that, described limiter of moment takes overall package.
6. moment limiting system according to claim 5, is characterized in that, described signal processing device is set to pulser.
7. moment limiting system according to claim 6, it is characterized in that, when described moment measuring device send be non-super torque signals time, the signal of the predetermined expression limiter of moment non-super moment that described pulser sends is continuous print pulse signal, and wherein the turn-off time of individual pulse is less than the limiter of moment detection signal time-delay action of setting;
When described moment measuring device send be super torque signals time, the signal that described pulser sends is the signal of the limiter of moment detection signal time-delay action being more than or equal to setting.
8. moment limiting system according to claim 7, is characterized in that, the predetermined way of described continuous print pulse signal comprises: the quantity of umber of pulse, interval time, array configuration.
9. the moment limiting system according to claim 4-8 any one, is characterized in that, described moment measuring device comprises the limit switch group be made up of at least one limit switch, the normally closed series connection of the limit switch in described limit switch group; When non-super moment, the signal that described moment measuring device sends is high level signal; When super moment, at least one the normally closed disconnection in described limit switch group, the signal that described moment measuring device sends is low level signal.
10. an engineering machinery, is characterized in that, comprises the moment limiting system as described in claim 4-9 any one.
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| CN2136824Y (en) * | 1992-03-28 | 1993-06-23 | 张锡成 | Operational moment limiter for hoist |
| CN2232430Y (en) * | 1995-01-20 | 1996-08-07 | 吕东明 | Intelligent liquid-crystal moment limiter for crane |
| CN201161883Y (en) * | 2007-10-31 | 2008-12-10 | 中铁武桥重工股份有限公司 | Load moment limiter with PLC as main controller integrated on crane control system |
| CN101628692A (en) * | 2009-08-06 | 2010-01-20 | 宜昌市创星电子技术发展有限公司 | Moment limiter for mini engineering crane |
| CN101648681A (en) * | 2009-09-03 | 2010-02-17 | 江西飞达电器设备有限公司 | Moment limiter of single and double horizontal arm tower crane |
| CN201971576U (en) * | 2011-03-23 | 2011-09-14 | 长沙中联重工科技发展股份有限公司 | Moment limiting device and tower crane with same |
| CN102556865A (en) * | 2012-02-01 | 2012-07-11 | 中联重科股份有限公司 | Crane moment restriction control apparatus, method thereof, system thereof and engineering machinery apparatus thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1805094C (en) * | 1990-04-06 | 1993-03-30 | Головное Специальное Конструкторско-Технологическое Бюро Научно-Производственного Объединения "Вниистройдормаш" | Boom crane overload safeguard |
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2013
- 2013-07-09 CN CN201310285632.2A patent/CN103323166B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2136824Y (en) * | 1992-03-28 | 1993-06-23 | 张锡成 | Operational moment limiter for hoist |
| CN2232430Y (en) * | 1995-01-20 | 1996-08-07 | 吕东明 | Intelligent liquid-crystal moment limiter for crane |
| CN201161883Y (en) * | 2007-10-31 | 2008-12-10 | 中铁武桥重工股份有限公司 | Load moment limiter with PLC as main controller integrated on crane control system |
| CN101628692A (en) * | 2009-08-06 | 2010-01-20 | 宜昌市创星电子技术发展有限公司 | Moment limiter for mini engineering crane |
| CN101648681A (en) * | 2009-09-03 | 2010-02-17 | 江西飞达电器设备有限公司 | Moment limiter of single and double horizontal arm tower crane |
| CN201971576U (en) * | 2011-03-23 | 2011-09-14 | 长沙中联重工科技发展股份有限公司 | Moment limiting device and tower crane with same |
| CN102556865A (en) * | 2012-02-01 | 2012-07-11 | 中联重科股份有限公司 | Crane moment restriction control apparatus, method thereof, system thereof and engineering machinery apparatus thereof |
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| CN103323166A (en) | 2013-09-25 |
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Effective date of registration: 20160808 Address after: 415106 Dingcheng City, Changde Province, the town of irrigation district ZOOMLION Creek Industrial Park Patentee after: China Construction Machinery Test Center Address before: 415106 Dingcheng City, Changde Province, the town of irrigation district ZOOMLION Creek Industrial Park Patentee before: Zoomlion Heavy Industry Science & Technology Development Co., Ltd. |
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Address after: 410013 Yuelu District, Hunan, silver basin Road, No. 361, No. Patentee after: China Construction Machinery Test Center Address before: 415106 Dingcheng City, Changde Province, the town of irrigation district ZOOMLION Creek Industrial Park Patentee before: China Construction Machinery Test Center |