CN201971576U - Moment limiting device and tower crane with same - Google Patents
Moment limiting device and tower crane with same Download PDFInfo
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- CN201971576U CN201971576U CN2011200797082U CN201120079708U CN201971576U CN 201971576 U CN201971576 U CN 201971576U CN 2011200797082 U CN2011200797082 U CN 2011200797082U CN 201120079708 U CN201120079708 U CN 201120079708U CN 201971576 U CN201971576 U CN 201971576U
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- 239000000725 suspension Substances 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 9
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- 238000005070 sampling Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 description 5
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- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
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- 238000010923 batch production Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
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Abstract
The utility model provides a moment limiting device and a tower crane with the same, wherein the moment limiting device comprises a first moment limiter (11), a second moment limiter (12) and a controller (13). The first moment limiter (11) and the second moment limiter (12) are used for detecting load moment borne by working equipment and transmitting a first limiting signal and a second limiting signal respectively when the load moment exceeds preset safety load moment; and the controller (13) is respectively connected with output ends of the first moment limiter (11) and the second moment limiter (12), and used for receiving the first limiting signal transmitted by the first moment limiter (11) and the second limiting signal transmitted by the second moment limiter (12), and generating a moment control signal for the working equipment to execute moment limiting operation according to the first limiting signal or the second limiting signal. By the aid of the technical scheme of the moment limiting device and the tower crane, measuring accuracy is ensured, and further more severe potential safety hazards of the working equipment are avoided.
Description
Technical field
The utility model relates to the hoisting crane field, relates in particular to a kind of moment inhibiting device and has its tower crane.
Background technology
The main construction machinery and equipment of modernization industry and civil construction during tower crane maintains the leading position in the use of high-rise industry and civil construction construction always.Updating, bringing in constant renewal in along with the new process of building, up-to-date technology, as block brick, large panel structure even box type construction etc. make the prefabricated assemblingization of fabric structure, batch production has reached very high level, and this just has higher requirement to the performance and the parameter of tower crane.
Present tower crane is still continued to use manual mode of operation basically.Because driver down from tower crane does not know when a certain position that maximum can hang that multiple goods do not know when the more heavy thing of lifting yet can be with much speed liftings, thereby can cause safety misadventure.So must the mounting torque killer on the tower crane so that the operation that potential safety hazard may take place is limited.
But what install on present most tower crane only is the mechanical transmission-type limiter of moment, when mechanical torque limiter breaks down, just can't the operation of tower crane be limited, and the reliability of tower crane is reduced greatly.
The utility model content
The utility model aims to provide a kind of moment inhibiting device and has its tower crane, with the lower problem of reliability that solves tower crane of the prior art.
To achieve these goals, according to an aspect of the present utility model, a kind of moment inhibiting device is provided, it is characterized in that, comprise: first limiter of moment and second limiter of moment, be used for the load moment that testing equipment is born, when load moment surpasses default safe moment, send first restricting signal and second restricting signal respectively; Controller, mouth with the first moment limiting device and the second moment limiting device is connected respectively, be used to receive first restricting signal of first limiter of moment transmission and second restricting signal that second limiter of moment sends, produce the Torque Control signal that the restriction of working equipment execution moment is operated according to first restricting signal or the second spacing system signal.
Further, first limiter of moment is the mechanical force moment limiting device, and second limiter of moment is the electronic moment killer.
According to another aspect of the present utility model, a kind of tower crane is provided, comprise above-mentioned moment inhibiting device.
Further, hoisting crane also comprises: pylon; Be arranged on the jib on the pylon; Extend upward with support from tower top and to be used for the stay cord bracing frame of stay cord of tractive jib; Along jib trolley movably; First drive motor of actuation movement dolly; And second drive motor that is arranged on the hook lifting on the trolley by the lifting rope driving, wherein, first limiter of moment in the moment inhibiting device is the mechanical torque limiter that is arranged on the stay cord bracing frame, and mechanical torque limiter comprises: the sampling steel plate is arranged on the stay cord bracing frame; Micro-switch is connected with the sampling steel plate, sends first restricting signal according to the deformation quantity of the steel plate of taking a sample.
Further, second limiter of moment in the moment inhibiting device is the electronic moment limiting device, and the electronic moment limiting device comprises: weight sensor, be arranged on the lifting rope of stay cord bracing frame top end, and be used to obtain the load weight on the suspension hook; Potentiometer is connected with first drive motor, is used to obtain the miles of relative movement of trolley, and wherein, controller obtains second limit signal according to miles of relative movement and load weight.
Further, current potential is counted variable resistance.
Further, controller is PLC.
Use the technical solution of the utility model, by use first limiter of moment and second limiter of moment simultaneously at the moment inhibiting device load moment of working equipment is detected, just can measure simultaneously one or more stressed positions, not only guaranteed the accuracy of measuring, and when one of them moment limiting device et out of order or measured error increase, can not make working equipment comparatively serious potential safety hazard occur yet.
Except purpose described above, feature and advantage, the utility model also has other purpose, feature and advantage.With reference to figure, the utility model is described in further detail below.
Description of drawings
Accompanying drawing is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 shows the moment inhibiting device scheme drawing according to the utility model embodiment;
Fig. 2 shows the structural principle scheme drawing of tower crane; And
Fig. 3 shows the circuit theory scheme drawing of weight signal and range signal collection.
The specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
Fig. 1 shows the moment inhibiting device scheme drawing according to the utility model embodiment.As shown in Figure 1, the moment inhibiting device comprises: first limiter of moment 11, second limiter of moment 12 and controller 13.Wherein, controller 13 is connected with the mouth of the first moment limiting device and the second moment limiting device respectively.
Wherein, first limiter of moment 11 and second limiter of moment 12 are used for the load moment that testing equipment is born, and when load moment surpasses default safe moment, send first restricting signal and second restricting signal respectively; Controller 13 then is used to receive first restricting signal of first limiter of moment transmission and second restricting signal that second limiter of moment sends, and produces the Torque Control signal that the restriction of working equipment execution moment is operated according to first restricting signal or the second spacing system signal.
With the tower crane is example, when weight that operating personal is sling heavier, is arranged on the moment that first limiter of moment 11 on the tower crane and second limiter of moment 12 detect one or more stressed positions.Controller 13 then is used to receive first restricting signal of first limiter of moment transmission and second restricting signal that second limiter of moment sends, and judges whether first torque signals or second torque signals have surpassed the default safe moment of institute detection position.When any one signal in first restricting signal or the second spacing system signal has surpassed default safe moment, controller 13 can produce the Torque Control signal that makes tower crane carry out moment restriction operation, thereby the restriction tower crane is carried out corresponding operation, has guaranteed the safety of working equipment.And, owing to adopt the load moment of first limiter of moment 11 and 12 pairs of working equipments of second limiter of moment to detect simultaneously, just can measure simultaneously one or more stressed positions, not only guaranteed the accuracy of measuring, and when one of them moment limiting device et out of order or measured error increase, can not make working equipment comparatively serious potential safety hazard occur yet, make the more safe and reliable operation of working equipment.
Particularly, first limiter of moment is the mechanical force moment limiting device, and second limiter of moment is the electronic moment killer.Certainly, also can adopt two mechanical force moment limiting devices, perhaps adopt two electronic moment killers as first limiter of moment and second limiter of moment as first limiter of moment and second limiter of moment.The existing in the prior art more introduction of its concrete structure, and also can buy the limiter of moment that is applicable to different occasions on the market, so the structure of limiter of moment is not described in detail at this.
Describe a concrete example using the moment inhibiting device in the utility model in detail below in conjunction with Fig. 2.
Fig. 2 shows the structural principle scheme drawing of tower crane.As shown in Figure 2, the tower crane in the present embodiment comprises above-mentioned moment inhibiting device.
And as shown in Figure 2, hoisting crane also comprises pylon; Be arranged on the jib 2 on the pylon 1; Extend upward from pylon 1 top with support and be used for the stay cord bracing frame 4 of stay cord 3 of tractive jib 2; Along jib 2 trolley 5 movably; First drive motor 6 of actuation movement dolly; And the second drive motor (not shown) that is arranged on suspension hook 8 liftings on the trolley 5 by lifting rope 7 drivings.
Wherein, first limiter of moment in the moment inhibiting device is the mechanical torque limiter 11 that is arranged on the stay cord bracing frame 4.Mechanical torque limiter 11 in the present embodiment comprises: the sampling steel plate is arranged on the stay cord bracing frame 4; Micro-switch is connected with the sampling steel plate, when the type variable of sampling steel plate surpasses default safe moment, micro-switch is opened, and produces a switching value signal and is sent in the controller 13 as first restricting signal.Then under nominal situation, when suspension hook 8 upwards promoted the outside luffing of load or trolley 5, mechanical torque limiter 11 sent the signal of first moment restriction according to the deformation of stay cord bracing frame 4.
Wherein, second limiter of moment in the moment inhibiting device is an electronic moment limiting device 12, comprising: weight sensor 121, be arranged on the lifting rope 7 of stay cord bracing frame 2 top ends, and be used to obtain the load weight on the weight body; Potentiometer 122 is connected with first drive motor 6, is used to obtain the miles of relative movement of trolley 5, and wherein, controller obtains second limit signal according to miles of relative movement and load weight.
Because the Calculating Torque during Rotary formula is: moment=weight X amplitude, the therefore weight by the object on the suspension hook and calculate suspension hook just can calculate position to be detected apart from the distance of position to be detected moment.Therefore, the lifting rope 7 that is used to drive suspension hook 8 liftings is provided with weight sensor 121 with the position of stay cord bracing frame 2 joints, just can obtain the weight of the load of suspension on the suspension hook 8 according to lifting rope 7.And owing to trolley 5 is controlled by first drive motor 6, therefore just can be by first drive motor, 6 motors are measured trolley 5 miles of relative movement.Be the miles of relative movement that the miles of relative movement of trolley 5 can obtain trolley 5 by the variable quantity that seals in potentiometer 122 in the acquisition of signal loop in first drive motor 6.Simultaneously, controller 13 receives the weight of the load that weight sensors send and the miles of relative movement of the trolley 5 that potentiometer sends, and calculates the moment of position to be detected by the moment formula, obtains second limit signal.
Fig. 3 shows the circuit theory scheme drawing of weight signal and range signal collection.As shown in Figure 3, direct supply is weight sensor 121 and potentiometer 122, and weight sensor 121 provides the signal of reflected load weight to controller 13.The miles of relative movement of trolley 5 then is the potentiometer 122 that seals in by in the acquisition of signal loop in first drive motor 6, obtains with swept resistance dividing potential drop in the multi-functional limiting device.Controller 13 receives the signal of the reflected load weight that weight sensors send and the potentiometric signal of the miles of relative movement that trolley 5 is obtained in reflection, calculates the moment of position to be detected by the moment formula, obtains second limit signal.
When controller 13 was judged first restricting signal that receives or any one signal in second restricting signal greater than default safe moment, suspension hook 8 just can not upwards promote weight, and trolley 5 can not outwards be walked.And suspension hook 8 can only be implemented action that weight is transferred, and trolley 5 can only be implemented the inwardly action of walking.Therefore, under abnormal condition, no matter mechanical torque limiter damage or potential device, weight sensor are damaged, and do not influence the spacing operation at tower crane, have improved safety greatly.
As can be seen from the above description, the utility model the above embodiments have realized following technique effect:
Use the technical solution of the utility model, by use first limiter of moment and second limiter of moment simultaneously at the moment inhibiting device load moment of working equipment is detected, just can measure simultaneously one or more stressed positions, not only guaranteed the accuracy of measuring, and when one of them moment limiting device et out of order or measured error increase, can not make working equipment comparatively serious potential safety hazard occur yet.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. a moment inhibiting device is characterized in that, comprising:
First limiter of moment (11) and second limiter of moment (12) are used for the load moment that testing equipment is born, and when described load moment surpasses default safe moment, send first restricting signal and second restricting signal respectively;
Controller (13), mouth with described first moment limiting device (11) and the described second moment limiting device (12) is connected respectively, be used to receive first restricting signal of described first limiter of moment (11) transmission and second restricting signal that described second limiter of moment (12) sends, produce the Torque Control signal that the restriction of described working equipment execution moment is operated according to described first restricting signal or the second spacing system signal.
2. moment inhibiting device according to claim 1 is characterized in that, described first limiter of moment (11) is the mechanical force moment limiting device, and described second limiter of moment (12) is the electronic moment killer.
3. a tower crane is characterized in that, comprises claim 1 or 2 described moment inhibiting device.
4. tower crane according to claim 3 is characterized in that, described hoisting crane also comprises:
Pylon (1);
Be arranged on the jib (2) on the described pylon (1);
Extend upward from described pylon (2) top with support and be used for the stay cord bracing frame (4) of stay cord (3) of the described jib of tractive (2);
Along described jib (2) trolley (5) movably;
Drive first drive motor (6) of described trolley (5); And
Drive second drive motor that is arranged on suspension hook (8) lifting on the described trolley (5) by lifting rope (7),
Wherein, first limiter of moment in the described moment inhibiting device is the mechanical torque limiter that is arranged on the described stay cord bracing frame, and described mechanical torque limiter comprises:
The sampling steel plate is arranged on the described stay cord bracing frame;
Micro-switch is connected with described sampling steel plate, sends first restricting signal according to the deformation quantity of described sampling steel plate.
5. tower crane according to claim 4 is characterized in that, second limiter of moment in the described moment inhibiting device is the electronic moment limiting device, and described electronic moment limiting device comprises:
Weight sensor (121) is arranged on the described lifting rope of described stay cord bracing frame top end, is used to obtain the last load weight of described suspension hook (8);
Potentiometer (122) is connected with described first drive motor (6), is used to obtain the miles of relative movement of described trolley (5), and wherein, described controller (13) obtains described second limit signal according to described miles of relative movement and described load weight.
6. tower crane according to claim 5 is characterized in that, described potentiometer (122) is a variable resistance.
7. according to each described tower crane in the claim 3 to 6, it is characterized in that described controller (13) is PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200797082U CN201971576U (en) | 2011-03-23 | 2011-03-23 | Moment limiting device and tower crane with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200797082U CN201971576U (en) | 2011-03-23 | 2011-03-23 | Moment limiting device and tower crane with same |
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| Publication Number | Publication Date |
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| CN201971576U true CN201971576U (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200797082U Expired - Lifetime CN201971576U (en) | 2011-03-23 | 2011-03-23 | Moment limiting device and tower crane with same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103569867A (en) * | 2013-11-15 | 2014-02-12 | 中联重科股份有限公司 | Hoisting machinery arm support side-tipping monitoring equipment, system and method and engineering machinery |
| 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 |
| CN106865430A (en) * | 2017-03-14 | 2017-06-20 | 苏州蓝王机床工具科技有限公司 | A kind of tower crane car limit device |
-
2011
- 2011-03-23 CN CN2011200797082U patent/CN201971576U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103569867A (en) * | 2013-11-15 | 2014-02-12 | 中联重科股份有限公司 | Hoisting machinery arm support side-tipping monitoring equipment, system and method and engineering machinery |
| CN103569867B (en) * | 2013-11-15 | 2015-08-12 | 中联重科股份有限公司 | Hoisting machinery arm support side-tipping monitoring equipment, system and method and engineering machinery |
| 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 |
| CN106865430A (en) * | 2017-03-14 | 2017-06-20 | 苏州蓝王机床工具科技有限公司 | A kind of tower crane car limit device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 410013, No. 361, silver basin South Road, Changsha, Hunan, Hunan, Changsha Patentee after: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. Address before: 410013, No. 361, silver basin South Road, Changsha, Hunan, Hunan, Changsha Patentee before: CHANGSHA ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY DEVELOPMENT Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110914 |
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| CX01 | Expiry of patent term |