CN111747325A - Intelligent electronic limit switch controller for tower crane - Google Patents
Intelligent electronic limit switch controller for tower crane Download PDFInfo
- Publication number
- CN111747325A CN111747325A CN201910234284.3A CN201910234284A CN111747325A CN 111747325 A CN111747325 A CN 111747325A CN 201910234284 A CN201910234284 A CN 201910234284A CN 111747325 A CN111747325 A CN 111747325A
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- China
- Prior art keywords
- limit switch
- assembly
- tower crane
- electronic limit
- whole machine
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004891 communication Methods 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 description 21
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/88—Safety gear
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- 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
- B66C23/90—Devices for indicating or limiting lifting moment
- B66C23/905—Devices for indicating or limiting lifting moment electrical
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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
- B66C23/94—Safety gear for limiting slewing movements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention relates to an intelligent electronic limit switch controller of a tower crane, which comprises a front display operation panel component, an electronic linear position switch control panel component, a whole machine shell component and a rear input/output interface panel component, wherein the front display operation panel component is connected to the left end of the whole machine shell component, the rear input/output interface panel component is connected to the right end of the whole machine shell component, and the electronic limit switch control panel component is connected to the inside of the whole machine shell component.
Description
Technical Field
The invention belongs to the field of tower cranes in the construction industry, and particularly relates to an intelligent electronic limit switch controller for a tower crane.
Background
A tower crane (short for tower crane) is a hoisting device used for building construction, and a limit switch is a protection device for preventing safety accidents such as top rushing and the like in the running process of the tower crane. At present, most of mechanical cams used in the application field of the tower crane in China are used as limit switch protection devices, the mechanical cam switches have the defects of troublesome installation and debugging, easy damage of mechanical contacts and single function in the application of the tower crane, and safety accidents caused by mechanical limit failure in the operation process of the tower crane are easily caused, and the consequences are very serious.
Disclosure of Invention
The invention aims to solve the defects and provides an intelligent electronic limit switch controller for a tower crane.
In order to overcome the defects in the background art, the technical scheme adopted by the invention for solving the technical problems is as follows: an intelligent electronic limit switch controller of a tower crane comprises a front display operation panel assembly, an electronic line position switch control panel assembly, a whole machine casing assembly and a rear input/output interface panel assembly, wherein the front display operation panel assembly is connected to the left end of the whole machine casing assembly, the rear input/output interface panel assembly is connected to the right end of the whole machine casing assembly, and the electronic limit switch control panel assembly is connected to the inside of the whole machine casing assembly.
In a preferred embodiment of the present invention, the front display operation panel assembly comprises an eight-segment LED nixie tube display, a plurality of LED display lamps and a key operation panel.
In a preferred embodiment of the invention, the control board of the electronic wire position switch comprises an MCU control circuit and an input and output signal conditioning circuit.
In a preferred embodiment of the invention, the whole machine shell assembly comprises a box body and a pressing strip baffle.
In a preferred embodiment of the present invention, the rear input/output interface board assembly includes 4 encoder signal acquisition input interfaces, an encoder signal enable dial switch operation panel, a power input interface, and two RJ45 communication interfaces.
The invention has the beneficial effects that: simple structure adopts electron limit switch controller not only effectual the defect of having solved mechanical cam debugging trouble, cycle length and wearing and tearing, has still improved the flexibility of operation, uses an electron limit switch controller just can carry out nimble configuration to tower machine hoisting mechanism, rotary mechanism, luffing mechanism and running gear's spacing signal, the simple operation, and the practicality is higher, and the security is better simultaneously.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic view of the front and rear panels of the whole machine of the present invention.
FIG. 3 is an overall application block diagram of the invention in the matching of a tower crane electric control system and a frequency converter.
Fig. 4 is a schematic diagram of the state of the hoisting mechanism of the invention operating on a tower crane system.
Detailed Description
1. The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
As shown in figure 1, a tower machine intelligence electron limit switch controller which characterized in that: the electronic limit switch control panel assembly comprises a front display operation panel assembly 1, an electronic line position switch control panel assembly 2, a whole machine shell assembly 3 and a rear input and output interface board assembly 4, wherein the front display operation panel assembly 1 is connected to the left end of the whole machine shell assembly 3, the rear input and output interface board assembly 4 is connected to the right end of the whole machine shell assembly 3, and the electronic limit switch control panel assembly 2 is connected to the inside of the whole machine shell assembly 3.
The working principle of the present invention will be described in further detail with reference to fig. 2-4.
Example (b): referring to fig. 2, a schematic diagram of front and rear panels of an intelligent electronic limit switch controller of a tower crane comprises an operation panel, a sensor input interface of the limit switch controller, a digital output interface component, a communication interface and a power input interface.
Fig. 2-a is a schematic diagram of a front panel of the present patent, which mainly functions as a human-computer interaction panel for a user to configure parameters: a represents a 4-bit eight-segment nixie tube display which is used for displaying the value of the encoder of the currently selected mechanism, and the left side of the nixie tube is provided with two LEDs which are used for displaying the running direction of the current rising mechanism; b is the output state indication condition of the 16-path DO of the invention; c, two columns of LED status indicator lamps, wherein the left column of LEDs is used for selecting the working mode of the equipment, and the right column of LEDs is used for displaying which mechanism the set object is; the i is an operation key, and the main functions of the i are to set parameters, adjust the working mode and select a debugging object.
Fig. 2-B is a schematic diagram of a patented back panel, whose main functions are some peripheral input and output interfaces of the device, in which: d is a four-mechanism encoder enabling selection dial switch, and the dial switch can be used for shielding a corresponding limit function at a specific time; e is a four-mechanism encoder (the encoder and the actuating motor rotate coaxially through a reduction ratio) input interface special for the tower crane; f is a DO output terminal of the invention, which can be used for connecting control equipment such as a PLC or a frequency converter and the like to realize a pre-designed function; g is the interface of two RJs 45, the main purpose of which is: the communication port is used for expanding the software of the remote setting upper computer; the second communication port is used for communicating with the frequency converter; h is the power input interface of the invention, and the voltage input range is 220 VAC.
Example (b): referring to fig. 3, a block diagram of a system for controlling an electronic limit switch in cooperation with an electric control device of a tower crane is shown, wherein j in the block diagram is a rising mechanism control frequency converter; k is a rotating mechanism control frequency converter; l is a variable amplitude mechanism control frequency converter; m is a rotating mechanism control frequency converter; n is the electronic limit switch controller designed by the invention. The input of the invention in the whole electric control system is the position information acquired by the four mechanisms of the tower crane through the encoder; the output is a 16-way programmable DO terminal output.
The work pattern of the special electron limit switch controller of tower machine that this patent designed has two kinds:
a) setting modes
When the electronic limit switch controller is in a setting mode, the input mode of a panel or a remote upper computer can be utilized to set the attributes of ON/OFF angles, original point setting, end point setting and the like of all running actions in the whole control process, and the customized function of a user is realized.
Before the set point of the ON/OFF point is carried out, the origin and the end point of the limit are firstly set, and after the origin and the end point are set, the switch point of the electronic limit switch is configured next.
The electronic limit switch designed by this patent provides 16 programmable ON/OFF set points, configurable via a panel or communications interface to the user's requirements, the 16 ON/OFF set points corresponding to the 16 DO outputs. The DO output can be directly connected to a terminal of the frequency converter as a limit signal to control the actuating mechanism.
b) Mode of operation
In the running mode, the microcontroller collects the position sensor codes or pulses from the encoder input interface, processes the position sensor codes or pulses, converts the position sensor codes or pulses into corresponding angle values in a table look-up mode, compares the angle values with the set ON/OFF angle to determine the angle interval in which the position sensor is located, and enables the DO output corresponding to the position sensor to be in an effective level state. Therefore, the PLC can be omitted from the control system, and only the electronic limit switch and the frequency converter need to be programmed.
Example (b): referring to fig. 4, an analysis diagram of the application principle of the electronic limit switch controller for the hoisting mechanism is shown. Meanwhile, point A is a lower stop limit point, point B is a lower deceleration limit point, point C is an upper deceleration limit point, and point D is an upper stop limit point. This patent combines tower machine scene operating mode setting to change the section speed of converter at the corresponding point, reaches the emergence that prevents the incident.
Taking the setting of the limit signal of the hoisting mechanism as an example, the specific operation flow is as follows:
1) the method comprises the following steps: the electronic limit switch controller is set in a setting mode, an operator controls the lifting mechanism to ascend and descend to a proper position, and ascending terminal limit and descending terminal limit positions are calibrated. At the moment, the electronic limit switch controls the value of the encoder to be read in and stored in the flash.
2) Step two: the electronic limit switch controller is set in a setting mode, an operator sets an upper deceleration limit position and a lower deceleration limit position according to field experience, configures the enabling state of corresponding DO, and simultaneously stores configuration information in a flash in the electronic limit switch controller.
3) Step three: the driver operates the hoisting mechanism to test the upper and lower deceleration limit signals and the terminal limit signal, the operator can repeat the second step of operation according to the field working condition, and dynamically corrects the value of the ON/OFF switch point set in the electronic limit switch to achieve the best effect.
The specific arrangement method of the rotating mechanism, the amplitude variation mechanism and the travelling mechanism is similar to that of a hoisting mechanism. Compared with the prior art, the invention has the following advantages:
1) the invention is not only suitable for the electric control system with PLC, but also suitable for the electric control system without PLC;
2) for some tower cranes which DO not have frequency converters and directly adopt an electric control system driven by power frequency, the DO output of the invention needs to be added with a relay control board, and the relay control board is used for controlling a contactor of a motor input power supply. Directly cutting off the input power supply to control the stop limit, wherein no upper deceleration limit signal and no lower deceleration limit signal can be used;
3) the electronic limit switch controller can exist with a traditional mechanical cam at the same time, and plays a role in double protection.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An intelligent electronic limit switch controller of a tower crane is characterized in that: the electronic limit switch control panel assembly is characterized by comprising a front display operation panel assembly (1), an electronic line position switch control panel assembly (2), a whole machine casing assembly (3) and a rear input/output interface panel assembly (4), wherein the front display operation panel assembly (1) is connected to the left end of the whole machine casing assembly (3), the rear input/output interface panel assembly (4) is connected to the right end of the whole machine casing assembly (3), and the electronic limit switch control panel assembly (2) is connected to the inside of the whole machine casing assembly (3).
2. The intelligent electronic limit switch controller of the tower crane according to claim 1, characterized in that: the front display operation panel component (1) comprises eight sections of LED nixie tube displays, a plurality of LED display lamps and a key operation panel.
3. The intelligent electronic limit switch controller of the tower crane according to claim 1, characterized in that: the electronic wire position switch control panel (2) comprises an MCU control circuit and an input/output signal conditioning circuit.
4. The intelligent electronic limit switch controller of the tower crane according to claim 1, characterized in that: the whole machine shell assembly (3) comprises a box body and a pressing strip baffle.
5. The intelligent electronic limit switch controller of the tower crane according to claim 1, characterized in that: the rear input/output interface board assembly (4) comprises 4 encoder signal acquisition input interfaces, an encoder signal enabling dial switch operating panel, a power supply input interface and two RJ45 communication interfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910234284.3A CN111747325A (en) | 2019-03-26 | 2019-03-26 | Intelligent electronic limit switch controller for tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910234284.3A CN111747325A (en) | 2019-03-26 | 2019-03-26 | Intelligent electronic limit switch controller for tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111747325A true CN111747325A (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910234284.3A Pending CN111747325A (en) | 2019-03-26 | 2019-03-26 | Intelligent electronic limit switch controller for tower crane |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2565059Y (en) * | 2002-08-26 | 2003-08-06 | 上海震隆微电子有限公司 | Module type mechanoelectric controller |
| CN2727131Y (en) * | 2004-09-24 | 2005-09-21 | 乐智君 | Intelligent limiter for force moment of crane |
| CN101497417A (en) * | 2008-01-29 | 2009-08-05 | 黎峰 | Tower crane remote intelligent operation apparatus |
| CN201753236U (en) * | 2010-04-07 | 2011-03-02 | 梁有旺 | Intelligent limiting audible and visual alarm controller of crane |
| CN204138225U (en) * | 2014-09-24 | 2015-02-04 | 西安吉宝电子科技有限公司 | Tower crane safety monitoring system |
| CN204508606U (en) * | 2015-02-09 | 2015-07-29 | 沈阳大学 | A kind of tower crane apparatus for monitoring working state |
-
2019
- 2019-03-26 CN CN201910234284.3A patent/CN111747325A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2565059Y (en) * | 2002-08-26 | 2003-08-06 | 上海震隆微电子有限公司 | Module type mechanoelectric controller |
| CN2727131Y (en) * | 2004-09-24 | 2005-09-21 | 乐智君 | Intelligent limiter for force moment of crane |
| CN101497417A (en) * | 2008-01-29 | 2009-08-05 | 黎峰 | Tower crane remote intelligent operation apparatus |
| CN201753236U (en) * | 2010-04-07 | 2011-03-02 | 梁有旺 | Intelligent limiting audible and visual alarm controller of crane |
| CN204138225U (en) * | 2014-09-24 | 2015-02-04 | 西安吉宝电子科技有限公司 | Tower crane safety monitoring system |
| CN204508606U (en) * | 2015-02-09 | 2015-07-29 | 沈阳大学 | A kind of tower crane apparatus for monitoring working state |
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Application publication date: 20201009 |