CN109573838B - Method and device for monitoring jacking state of tower crane and tower crane - Google Patents
Method and device for monitoring jacking state of tower crane and tower crane Download PDFInfo
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- CN109573838B CN109573838B CN201811505696.8A CN201811505696A CN109573838B CN 109573838 B CN109573838 B CN 109573838B CN 201811505696 A CN201811505696 A CN 201811505696A CN 109573838 B CN109573838 B CN 109573838B
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- tower crane
- jacking
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- lifting
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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
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
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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
Abstract
The embodiment of the invention provides a method and a device for monitoring the jacking state of a tower crane and the tower crane, and belongs to the technical field of engineering. The tower crane is provided with a moment limiter, the moment limiter is used for setting the number of travel switches and/or travel sensors and/or the clearance thereof based on a preset hoisting moment corresponding to the jacking trim position of the tower crane, the moment limiter is used for sending out a jacking trim signal when the tower crane reaches the jacking trim position, and the method comprises the following steps: under the condition that the jacking trim signal is not received, displaying that the tower crane does not reach a jacking trim position; when a jacking trim signal is received, displaying that the tower crane reaches a jacking trim position; and displaying that the tower crane loses the jacking trim position and giving an alarm under the condition that jacking continues after the jacking trim signal is received. Therefore, the jacking state of the tower crane can be monitored at low cost.
Description
Technical Field
The invention relates to the technical field of engineering, in particular to a method and a device for monitoring the jacking state of a tower crane and the tower crane.
Background
Jacking safety is the most important ring of the safety of the tower crane, and trimming adjustment work is required before jacking operation so as to ensure that the tower crane is in a 'jacking balance state'. At present, certain research is carried out on monitoring work of the jacking balance state of the tower crane in the industry, but the monitoring work is not in practical use, a large number of sensors are generally required to be additionally arranged in each scheme, so that the comprehensive cost and the failure rate of the monitoring system are difficult to guarantee, and in addition, each scheme lacks necessary and deep explanation on a low-cost design method and a theory of the monitoring system.
Disclosure of Invention
It is an object of the present invention to provide a method and apparatus for monitoring the jacking status of a tower crane and a machine readable storage medium which address, or at least partially address, the above mentioned problems.
In order to achieve the above object, an aspect of the present invention provides a method for monitoring a tower crane jacking state, the tower crane being provided with a torque limiter which is set the number of stroke switches and/or stroke sensors and/or a gap thereof included therein based on a preset lifting torque corresponding to a jacking trim position of the tower crane, the torque limiter being configured to issue a jacking trim signal if the tower crane reaches the jacking trim position, the method comprising: under the condition that the jacking trim signal is not received, displaying that the tower crane does not reach a jacking trim position; when the jacking trim signal is received, displaying that the tower crane reaches a jacking trim position; and displaying the lifting trim position lost of the tower crane and giving an alarm under the condition that the tower crane continues to lift after receiving the lifting trim signal.
Optionally, the method further comprises: detecting the amplitude of a trolley mechanism of the tower crane and the weight of a lifting hook in the jacking process of the tower crane; calculating a real-time lifting moment of the tower crane according to the amplitude and the weight; comparing the real-time lifting moment with the preset lifting moment; and performing one of the following operations according to the comparison result: under the condition that the real-time hoisting moment is smaller than the preset hoisting moment, displaying that the tower crane does not reach a jacking trim position; displaying that the tower crane reaches a jacking trim position under the condition that the real-time hoisting moment is equal to the preset hoisting moment; and displaying the lifting trim position of the tower crane and giving an alarm when the real-time lifting moment is larger than the preset lifting moment.
Accordingly, another aspect of the present invention provides an apparatus for monitoring a jacking state of a tower crane, the apparatus comprising: the moment limiter is arranged on the tower crane and is used for adjusting the number and/or the clearance of the travel switches and/or the travel sensors based on a preset lifting moment corresponding to the jacking trim position of the tower crane, the moment limiter is used for sending a jacking trim signal when the tower crane reaches the jacking trim position, and the control module is used for: under the condition that the jacking trim signal is not received, controlling a display module to display that the tower crane does not reach a jacking trim position; when the jacking balancing signal is received, controlling the display module to display that the tower crane reaches a jacking balancing position; and under the condition of continuing jacking after receiving the jacking balancing signal, controlling the display module to display that the tower crane loses the jacking balancing position and controlling the alarm module to give an alarm; the display module; and the alarm module.
Optionally, the apparatus further comprises: the amplitude detection module is used for detecting the amplitude of a trolley mechanism of the tower crane in the jacking process of the tower crane; the weight detection module is used for detecting the weight of a lifting hook of the tower crane in the jacking process of the tower crane; the control module is further configured to: calculating a real-time lifting moment of the tower crane according to the amplitude and the weight; comparing the real-time lifting moment with the preset lifting moment; and performing one of the following operations according to the comparison result: under the condition that the real-time hoisting moment is smaller than the preset hoisting moment, controlling the display module to display that the tower crane does not reach a jacking trim position; under the condition that the real-time hoisting moment is equal to the preset hoisting moment, controlling the display module to display that the tower crane reaches a jacking trim position; and under the condition that the real-time hoisting moment is larger than the preset hoisting moment, controlling the display module to display that the tower crane loses the jacking and balancing position and controlling the alarm module to give an alarm.
In addition, the invention also provides a tower crane, which comprises the device.
In addition, another aspect of the present invention also provides a machine-readable storage medium having stored thereon instructions for causing a machine to execute the above-mentioned method.
Through the technical scheme, the tower crane jacking state is monitored based on the torque limiter set according to the preset lifting torque corresponding to the jacking trim position of the tower crane, the jacking state of the tower crane can be monitored without newly arranging a large number of sensors, so that the cost of the monitoring system is reduced, the market competitiveness of tower crane products is favorably improved, the fault rate of the monitoring system is reduced, the maintenance cost of a user and the after-sale service cost of a tower crane manufacturer are reduced, and the tower crane jacking state is monitored at low cost.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a schematic diagram of a set torque limiter according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for monitoring a jacking state of a tower crane according to another embodiment of the present invention;
FIG. 3 is a flow chart of a method for monitoring a jacking state of a tower crane according to another embodiment of the present invention; and
fig. 4 is a block diagram of a device for monitoring the jacking state of a tower crane according to another embodiment of the invention.
Description of the reference numerals
1 bow-shaped plate 2 first travel switch
3 third stroke switch 4 fourth stroke switch
5 second travel switch 6 moment limiter
7 control module 8 display module
9 alarm module
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
One aspect of an embodiment of the present invention provides a method for monitoring a jacking state of a tower crane.
In an embodiment of the invention, the tower crane is provided with a moment limiter which is set up by the number of travel switches and/or travel sensors and/or their clearance included therein based on a preset lifting moment corresponding to a jacking trim position of the tower crane.
The predetermined lifting moment can be determined by the following. And selecting a standard test prototype configured in the same way as the tower crane, and calculating the rated lifting moment of the tower crane when the motor of the standard test prototype reaches the rated power, wherein the trolley mechanism is provided with a balancing weight. The rated lifting moment is the product of the amplitude of the trolley mechanism and the total weight of the lifting hook and the balancing weight when the motor reaches the rated power of the motor, namely the product of the total weight of the lifting hook and the weight of the balancing weight hung on the lifting hook and the amplitude of the trolley mechanism to obtain the rated lifting moment. The rated lifting moment of the tower crane when the motor reaches rated power is calculated for multiple times through multiple tests, the calculated average value of the rated lifting moment is obtained, the obtained average value of the rated lifting moment is multiplied by an empirical coefficient to obtain a preset lifting moment, wherein the empirical coefficient can be a numerical value in the range of 1.03-1.05.
After the predetermined lifting moment is determined, the existing moment limiter, which may be a mechanical moment limiter or an electronic moment limiter, is modified. The aim of the transformation of the existing moment limiter is to enable the moment limiter to send out a jacking and balancing signal to inform that the tower crane reaches a jacking and balancing position under the condition that the tower crane reaches a determined preset lifting moment. Retrofitting an existing torque limiter is achieved by increasing the number of travel switches and/or travel sensors included in the torque limiter and/or adjusting the clearance of the torque limiter. Wherein adjusting the clearance of the torque limiter may be achieved by rotating a bolt of the torque limiter. The set torque limiter can be seen in fig. 1. The torque limiter shown in fig. 1 is a mechanical torque limiter which originally comprises an arched plate 1, a first travel switch 2 and a second travel switch 5, a third travel switch 3 and a fourth travel switch 4 are added, and a gap is adjusted by rotating a bolt, and finally the torque limiter shown in fig. 1 is obtained. In addition, the set torque limiter shown in fig. 1 may be set by adding a stroke sensor. It should be noted that the setting torque limiter does not limit the number of the travel switches and/or the travel sensors and the gap of the torque limiter, and only needs to send a jacking and balancing signal when the tower crane reaches the preset hoisting torque.
In addition, the preset hoisting torque of different tower cranes may be different and needs to be determined according to the standard test prototype of each tower crane.
Specifically, in the embodiment of the invention, the method for monitoring the jacking state of the tower crane comprises the following steps. And in the jacking process of the tower crane, under the condition that a jacking trim signal sent by the moment limiter is not received, displaying that the tower crane does not reach a jacking trim position. And when a jacking trim signal sent by the torque limiter is received, displaying that the tower crane reaches a jacking trim position. And displaying that the tower crane loses the jacking trim position and giving an alarm under the condition that the tower crane continues to jack after receiving the jacking trim signal. In addition, the device displaying the top state may be any device that can display content, for example, various human-machine interaction interfaces.
The tower crane jacking state is monitored based on the torque limiter set according to the preset lifting torque corresponding to the jacking trim position of the tower crane, the tower crane jacking state can be monitored without newly arranging a large number of sensors, therefore, the cost of the monitoring system is reduced, the market competitiveness of tower crane products is favorably improved, the fault rate of the monitoring system is reduced, the maintenance cost of a user and the after-sales service cost of a tower crane manufacturer are reduced, and the tower crane jacking state is monitored at low cost.
Fig. 2 is a flowchart of a method for monitoring a jacking state of a tower crane according to another embodiment of the present invention, and the following describes monitoring the jacking state of the tower crane based on a jacking trim signal sent by a moment limiter with reference to fig. 2.
In step S20, it is determined whether a lift-up trim signal of the torque limiter is received during the lift-up of the tower crane, if so, step S22 is executed, and if not, step S21 is executed.
In step S21, it is displayed that the tower crane has not reached the top trim position. At this time, the tower crane is in a safe state. In addition, the safety state of the tower crane can be displayed to clearly inform the user.
In step S22, it is determined whether the tower crane continues to lift, if so, step S24 is executed, and if not, step S23 is executed.
In step S23, it is displayed that the tower crane reaches the top trim position.
In step S24, the tower crane is displayed as having lost the top trim position and alarmed to prompt the driver and/or surrounding construction personnel. At this time, the tower crane is in an unsafe state. In addition, the unsafe state of the tower crane can be displayed to clearly inform the user. In addition, the alarm may be an audible and visual alarm, or may be in other alarm modes, which is not intended to limit the present invention.
Optionally, in the embodiment of the present invention, the jacking state of the tower crane may be monitored by calculating the lifting moment of the tower crane in real time during the jacking of the tower crane. So, through the jacking state of two kinds of modes monitoring tower crane, more insurance, safety, the monitoring is more effective.
Fig. 3 is a flowchart of a method for monitoring the jacking state of a tower crane according to another embodiment of the present invention, and the method for monitoring the jacking state of the tower crane by calculating the lifting moment in real time is described with reference to fig. 2. In this embodiment, the method for monitoring the jacking state of the tower crane comprises the following steps.
In step S30, during the jacking of the tower crane, the amplitude and weight of the trolley mechanism of the tower crane are detected, wherein the fixed-weight trim weight is hung by the hook, and the detected weight comprises the actual weight of the hook and the weight of the trim weight hung by the hook.
In step S31, a real-time lifting moment of the tower crane is calculated based on the detected magnitude and weight.
In step S32, it is determined whether the real-time hoisting torque is equal to the preset hoisting torque, and if so, step S33 is executed, and if not, step S34 is executed. The method for determining the preset lifting moment can be found in the above-mentioned embodiments.
In step S33, it is displayed that the tower crane reaches the top trim position.
In step S34, it is determined whether the real-time hoisting torque is smaller than the preset hoisting torque, if so, the process is informed to step S35, otherwise, the process is executed to step S36.
In step S35, it is displayed that the tower crane has not reached the top trim position. At this time, the tower crane is in a safe state. In addition, the safety state of the tower crane can be displayed to clearly inform the user.
In step S36, the tower crane is displayed to lose the jacking trim position and is alarmed. At this time, the tower crane is in an unsafe state. In addition, the unsafe state of the tower crane can be displayed to clearly inform the user. In addition, the alarm may be an audible and visual alarm, or may be in other alarm modes, which is not intended to limit the present invention.
Correspondingly, the embodiment of the invention also provides a device for monitoring the jacking state of the tower crane.
Fig. 4 is a block diagram of a device for monitoring the jacking state of a tower crane according to another embodiment of the invention. As shown in fig. 4, the apparatus includes a torque limiter 6, a control module 7, a display module 8, and an alarm module 9. The moment limiter 6 is arranged on the tower crane, the number and/or the gap of the travel switches and/or the travel sensors included in the moment limiter are adjusted based on a preset lifting moment corresponding to the lifting trim position of the tower crane, and the moment limiter 6 is used for sending out a lifting trim signal when the tower crane reaches the lifting trim position. The control module 7 is used for controlling the display module 8 to display that the tower crane does not reach the jacking trim position under the condition that the jacking trim signal is not received; when the jacking and balancing signal is received, the display module 8 is controlled to display that the tower crane reaches a jacking and balancing position; and under the condition of continuing jacking after receiving the jacking balancing signal, controlling the display module 8 to display that the tower crane loses the jacking balancing position and controlling the alarm module 9 to give an alarm. Alternatively, the control module 7 may be a TSM (tower crane safety monitoring system) or a PLC.
Optionally, in an embodiment of the present invention, the apparatus further includes: the amplitude detection module is used for detecting the amplitude of a trolley mechanism of the tower crane in the jacking process of the tower crane; and the weight detection module is used for detecting the weight of a lifting hook of the tower crane in the jacking process of the tower crane. The control module is further configured to: calculating the real-time lifting moment of the tower crane according to the amplitude and the weight; comparing the real-time hoisting moment with a preset hoisting moment; and performing one of the following operations according to the comparison result: under the condition that the real-time hoisting moment is smaller than the preset hoisting moment, controlling a display module to display that the tower crane does not reach a jacking trim position; under the condition that the real-time hoisting moment is equal to the preset hoisting moment, controlling a display module to display that the tower crane reaches a jacking trim position; and under the condition that the real-time hoisting moment is larger than the preset hoisting moment, controlling the display module to display that the tower crane loses the jacking trim position and controlling the alarm module to give an alarm.
The specific working principle and the benefits of the device for monitoring the jacking state of the tower crane provided by the embodiment of the invention are similar to those of the method for monitoring the jacking state of the tower crane provided by the embodiment of the invention, and are not repeated here.
In addition, another aspect of the embodiments of the present invention further provides a tower crane, which includes the apparatus described in the above embodiments.
In addition, another aspect of the embodiments of the present invention also provides a machine-readable storage medium, which stores instructions for causing a machine to execute the method described in the above embodiments.
In conclusion, the tower crane jacking state is monitored based on the torque limiter set according to the preset lifting torque corresponding to the jacking trim position of the tower crane, and the tower crane jacking state can be monitored without additionally arranging a large number of sensors, so that the cost of the monitoring system is reduced, the market competitiveness of tower crane products is improved, the fault rate of the monitoring system is reduced, the maintenance cost of users and the after-sales service cost of tower crane manufacturers are reduced, and the tower crane jacking state is monitored at low cost.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not describe every possible combination.
Those skilled in the art will understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.
Claims (4)
1. A method for monitoring the jacking state of a tower crane, wherein the tower crane is provided with a torque limiter which is set to the number of travel switches and/or travel sensors comprised by the tower crane and/or its clearance based on a preset lifting torque corresponding to the jacking trim position of the tower crane, the torque limiter being adapted to issue a jacking trim signal if the tower crane reaches the jacking trim position, the method comprising:
under the condition that the jacking trim signal is not received, displaying that the tower crane does not reach a jacking trim position;
when the jacking trim signal is received, displaying that the tower crane reaches a jacking trim position;
under the condition of continuing jacking after receiving the jacking trim signal, displaying that the tower crane loses the jacking trim position and giving an alarm,
detecting the amplitude of a trolley mechanism of the tower crane and the weight of a lifting hook in the jacking process of the tower crane;
calculating a real-time lifting moment of the tower crane according to the amplitude and the weight;
comparing the real-time lifting moment with the preset lifting moment; and
performing one of the following operations according to the comparison result:
under the condition that the real-time hoisting moment is smaller than the preset hoisting moment, displaying that the tower crane does not reach a jacking trim position;
displaying that the tower crane reaches a jacking trim position under the condition that the real-time hoisting moment is equal to the preset hoisting moment; and
and under the condition that the real-time hoisting moment is greater than the preset hoisting moment, displaying that the tower crane loses the jacking trim position and giving an alarm.
2. A device for monitoring the jacking state of a tower crane, the device comprising:
a moment limiter arranged on the tower crane, the moment limiter is used for setting the number of travel switches and/or travel sensors and/or the clearance thereof based on a preset lifting moment corresponding to the lifting trim position of the tower crane, the moment limiter is used for sending out a lifting trim signal when the tower crane reaches the lifting trim position,
a control module to:
under the condition that the jacking trim signal is not received, controlling a display module to display that the tower crane does not reach a jacking trim position;
when the jacking balancing signal is received, controlling the display module to display that the tower crane reaches a jacking balancing position; and
under the condition of continuing jacking after receiving the jacking balancing signal, controlling the display module to display that the tower crane loses the jacking balancing position and controlling the alarm module to give an alarm;
the display module;
the alarm module is used for alarming the user,
the amplitude detection module is used for detecting the amplitude of a trolley mechanism of the tower crane in the jacking process of the tower crane; and
a weight detection module for detecting the weight of the hook of the tower crane in the jacking process of the tower crane, and
the control module is further configured to:
calculating a real-time lifting moment of the tower crane according to the amplitude and the weight;
comparing the real-time lifting moment with the preset lifting moment; and
performing one of the following operations according to the comparison result:
under the condition that the real-time hoisting moment is smaller than the preset hoisting moment, controlling the display module to display that the tower crane does not reach a jacking trim position;
under the condition that the real-time hoisting moment is equal to the preset hoisting moment, controlling the display module to display that the tower crane reaches a jacking trim position; and
and under the condition that the real-time hoisting moment is greater than the preset hoisting moment, controlling the display module to display that the tower crane loses the jacking and balancing position and controlling the alarm module to give an alarm.
3. A tower crane, characterized in that it comprises the apparatus of claim 2.
4. A machine-readable storage medium having stored thereon instructions for causing a machine to perform the method of claim 1.
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| CN201811505696.8A CN109573838B (en) | 2018-12-10 | 2018-12-10 | Method and device for monitoring jacking state of tower crane and tower crane |
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| CN201811505696.8A CN109573838B (en) | 2018-12-10 | 2018-12-10 | Method and device for monitoring jacking state of tower crane and tower crane |
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| CN109573838B true CN109573838B (en) | 2020-06-05 |
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| CN110980556B (en) * | 2019-12-23 | 2021-01-15 | 湖南中联重科建筑起重机械有限责任公司 | Control method and device for jacking and leveling of tower crane and tower crane |
| CN113636462A (en) * | 2021-07-26 | 2021-11-12 | 山东恒安泰重型机械有限公司 | Intelligent crane control system and control method |
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| FI115966B (en) * | 2000-08-29 | 2005-08-31 | Kci Kone Cranes Int Oy | Method and apparatus for controlling the opening of the lifting motor brake |
| CN102275837B (en) * | 2011-06-14 | 2015-03-18 | 上海三一科技有限公司 | Super-lifting counter weight optimization control device and method and crane comprising same |
| CN104045010B (en) * | 2014-06-10 | 2015-12-02 | 三峡大学 | A kind of tower machine jacking trim monitored control system, monitoring method and monitor |
| CN204917713U (en) * | 2015-07-10 | 2015-12-30 | 新乡新起机器设备有限公司 | Novel hoist torque limiter |
| CN105253775B (en) * | 2015-10-26 | 2017-02-01 | 中联重科股份有限公司 | Tower crane jacking and balancing control system, method and device and tower crane |
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Address after: 410013 No. 361 South silver basin, Changsha, Hunan, Yuelu District Patentee after: ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY Co.,Ltd. Patentee after: Zoomlion Construction Crane Co.,Ltd. Address before: 410013 No. 361 South silver basin, Changsha, Hunan, Yuelu District Patentee before: Zoomlion Heavy Industry Science and Technology Co.,Ltd. Patentee before: HUNAN ZHONGLIAN ZHONGKE CONSTRUCTION HOISTING MACHINERY Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20210105 Address after: No.18 Huagang East Road, Shizhuang, Huangtu Town, Jiangyin City, Wuxi City, Jiangsu Province Patentee after: Zoomlion construction machinery (Jiangsu) Co.,Ltd. Address before: 410013 No. 361 South silver basin, Changsha, Hunan, Yuelu District Patentee before: Zoomlion Heavy Industry Science and Technology Co.,Ltd. Patentee before: Zoomlion Construction Crane Co.,Ltd. |