CN207844955U - A kind of tower crane moment limiter and its safety control system - Google Patents
A kind of tower crane moment limiter and its safety control system Download PDFInfo
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- CN207844955U CN207844955U CN201820176275.4U CN201820176275U CN207844955U CN 207844955 U CN207844955 U CN 207844955U CN 201820176275 U CN201820176275 U CN 201820176275U CN 207844955 U CN207844955 U CN 207844955U
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Abstract
A kind of tower crane moment limiter of the utility model announcement and its safety control system, belong to engineering elevating mechanism.Lift controlling system including controlling tower crane lifting run action, the rotary control system of run action is turned round for controlling tower crane, luffing control system for controlling tower crane luffing run action, the control device of run action control command, and the control device for operating control device are sent out to lift controlling system, rotary control system and luffing control system；Bus communicating devices and microswitch are connected to control device in tower crane moment limiter.The utility model can realize the real-time moment values detection under different amplitudes within the scope of arm length, and realize security control；Signal anti-interference ability and accuracy of detection are improved, while having the function of tamper；Limiter of moment has the dual moment inspecting of mechanical switching point and digital quantity, improves safety.
Description
Technical field
The utility model is related to a kind of engineering elevating mechanism, specifically a kind of tower crane moment limiter and its security control system
System.
Background technology
The mounting torque proving ring mechanical switching point in tower crane mechanism is generally used in tower crane industry at present（Most 4 inspections
Measuring point）Tower crane work torque is detected, and speed limit switching and limitation stopping are carried out to tower crane run action, but in this way can not
Torque real time data is obtained, operating personnel can not be intuitively visual, can not make the safety operation of anticipation in advance.For this purpose, in industry
There is part of the manufacturer that bearing pin sensor is installed on lifting capacity pulley to be detected hanging object weight, obtains lift heavy weight and count in real time
According to.The range value of suspension hook real time execution is obtained using amplitude sensor simultaneously.Control device is according to lift heavy weight and suspension hook amplitude
Value calculates real-time working moment values.
In the tower crane work run action security control to different torques, limited respectively using several torque threshold grades
Tower crane work run action under different torques.In industry general lifting amplitude-change be arranged several speed control grades, 1 surpass 80%
Torque restricting signal, 1 surpass 100% torque limitation stop signal, when PLC control devices detect torque M >=80%, control become
Width carries out fall-back to the run action of torque augment direction, forbids high-speed cruising；When detecting torque M >=100%, control
Luffing processed to the run action of torque augment direction limit out of service.
There are following technical disadvantages in above-mentioned technology：
1. the precision for detecting lift heavy weight with bearing pin sensor is low, stability is poor, of high cost；
2. limiting the tower crane run action under different torques respectively using several torque threshold grades, there are torque limits
Point is readily removable to remove problem；
3. obtaining real-time working moment values according to lift heavy weight and suspension hook range value using control device, that there are precision is low,
Poor, the of high cost problem of stability.
Invention content
In order to solve the above technical problems, a kind of tower crane moment limiter of the utility model offer and its safety control system.
The utility model is achieved through the following technical solutions：A kind of tower crane moment limiter, including it is fixed on tower crane steel structure
On arcuate plate and the shell that is fixed on arcuate plate；The foil gauge being fixed on arcuate plate is equipped in the shell；It is described to answer
Become piece and be connected with circuit conversion device, circuit conversion device connects bus communicating devices；Multiple fixations are additionally provided in the shell
Microswitch on arcuate plate；The touching dress for collide microswitch opposite with microswitch is installed on shell
It sets.
Preferably：There are four the microswitch is total, in a row side by side；Microswitch is connected with cable.
Preferably：The shell is equipped with lead-sealing lock.
A kind of safety control system of tower crane moment limiter；Lift control system including controlling tower crane lifting run action
System turns round the rotary control system of run action for controlling tower crane, and the luffing for controlling tower crane luffing run action controls
System sends out the control device of run action control command to lift controlling system, rotary control system and luffing control system,
And the control device for operating control device；Bus communicating devices are connected with microswitch in the tower crane moment limiter
To control device；The safety control system further includes being connect with control device for showing that tower crane operating parameter, parameter are set
It sets and the display device of warning message.
A kind of method of controlling security of tower crane moment limiter, includes the following steps：
1. control device gives tower crane run action and controls signal, control device controls letter according to the run action received
Number control tower crane lifting, revolution, luffing operation；
2. tower crane, during hanging carrying row, steel structure stress causes the arcuate plate stress deformation of limiter of moment；
Led to bus 3. this stress value is converted to digital signal by strain measurement to stress size, through circuit conversion device
The mode of letter is sent to control device, and control device carries out torque security restriction according to this moment values to tower crane；
4. in arm length amplitude range, when real-time working moment values are more than level-one speed limit threshold value, control device control
Luffing runs slowly outward；
5. when real-time working torque system is more than secondary limit threshold value, control device control luffing runs stopping outward；Together
When, real-time working moment values are shown on the desplay apparatus.
Compared with prior art, the utility model has the beneficial effects that：
1 by the real-time moment values of strain measurement arcuate plate shape changing detection, and tower crane control is sent in the form of digital quantity
The control device of system processed, and real-time moment values are shown on the desplay apparatus, it realizes within the scope of arm length under different amplitudes
Real-time moment values detection, and realize security control；
The real-time working moment values of detection are transferred to tower crane control system by 2 limiters of moment in a manner of bus communication
Control device, control device carry out security control to tower crane according to this moment values, improve signal anti-interference ability and accuracy of detection,
Has the function of tamper simultaneously, when removing, tower crane control system will produce alarm and control tower crane akinesia；
3 limiters of moment have the dual moment inspecting of mechanical switching point and digital quantity, improve safety.
Description of the drawings
Fig. 1 is the structural schematic diagram of tower crane moment limiter；
Fig. 2 is the safety control system schematic diagram of tower crane moment limiter.
Specific implementation mode
It is a specific embodiment of the utility model below, the utility model is described further in conjunction with attached drawing.
As shown in Figure 1, a kind of tower crane moment limiter, moment values when carrying stress are being hung for detecting tower crane.Wherein bend
Template 1 is the wide strip in the narrow centre in both ends, and arcuate plate 1 is welded on tower crane steel structure, for generating deformation in stress.Shell
5 are fixed on 1 middle part of arcuate plate, for protecting each parts, shell 5 to be equipped with lead-sealing lock 7；Foil gauge 3 is fixed on arcuate plate 1
On, the size of deformation is generated when for detecting arcuate plate stress；Foil gauge 3 is also associated with circuit conversion device 8, circuit conversion dress
Set 8 connection bus communicating devices 6；Circuit conversion device 8 is used to the stress value of foil gauge 3 being converted to electric signal and number is believed
Number, bus communicating devices 6 are used to the digital signal of detection being sent to the control device of tower crane control system.
4 microswitches 9 being fixed on side by side on arcuate plate 1 are additionally provided in shell 5, microswitch 9 is connected with cable
4；The touching device 2 for collide microswitch 9 opposite with microswitch 9 is installed on shell 5.Microswitch 9 is used for
1 deformation of detection arcuate plate simultaneously provides Torque Control signal to the control device of tower crane control system.
Shown in Fig. 2, a kind of safety control system of tower crane moment limiter includes being connect with control device
Rise control system, rotary control system, luffing control system, control device and tower crane moment limiter.Control device is for giving
Determine tower crane run action control signal.Control device is the core of control system, and the tower crane for receiving control device runs dynamic
Make control signal and sends out run action control command.Lift controlling system controls tower crane lifting run action；Revolution control system
System turns round run action for controlling tower crane；Luffing control system is for controlling tower crane luffing run action；Display device is used for
Show tower crane operating parameter, parameter setting and display alarm information.Bus communicating devices 6 and fine motion are opened in tower crane moment limiter
It closes 9 and is connected to control device；The real-time working moment values of detection are transferred to by tower crane moment limiter in a manner of bus communication
The control device of tower crane control system.
The method of controlling security of tower crane moment limiter includes the following steps：
1. control device gives tower crane run action and controls signal, control device controls letter according to the run action received
Number control tower crane lifting, revolution, luffing operation；
2. tower crane, during hanging carrying row, steel structure stress causes the arcuate plate stress deformation of limiter of moment；
Led to bus 3. this stress value is converted to digital signal by strain measurement to stress size, through circuit conversion device
The mode of letter is sent to control device, and control device carries out torque security restriction according to this moment values to tower crane；
4. in arm length amplitude range, when real-time working moment values are more than level-one speed limit threshold value, control device control
Luffing runs slowly outward；
5. when real-time working torque system is more than secondary limit threshold value, control device control luffing runs stopping outward；Together
When, real-time working moment values are shown on the desplay apparatus.
In addition, when removing limiter bus, control device can't detect bus handshake signal, will alarm and lock immediately
Control system cannot be run；When removing the analog signals circuit of foil gauge, control device hardware circuit can detect knowledge automatically
Other foil gauge analog signal lines open circuit will alarm and lock system and cannot run immediately；When the analogue signal circuit of foil gauge damages
Bad when, control device judge that limiter of moment failure will be alarmed immediately according to detection signal is unchanged with luffing run signal
And locked system cannot be run；When the analog signals for removing foil gauge and a set value signal is accessed instead of strain measurement letter
Number when, signal is unchanged, preset initial value and luffing run signal judge limiter of moment failure according to detection for control device
To alarm immediately and lock system cannot run.
Elastic deformation occurs in the utility model after arcuate plate stress, this deformation of strain measurement simultaneously converts dress by circuit
It sets and elastic deformation is converted into electric signal, converting electrical signals to digital signal, sent out digital signal by way of bus
Tower crane control device is given, control device converts digital signal to moment values and carries out Calculating Torque during Rotary to tower crane, and carries out corresponding
Limitation and security control.In addition, tower crane moment limiter also has carries out torque inspection by the type switching point of microswitch
Limitation function is surveyed, therefore this tower crane moment limiter has mechanical switching point and the dual torque limitation function of digital quantity, improves power
Square safety.When removing this tower crane moment limiter, tower crane control system is inscribed in preset time during hanging carrying row
When can not receive the real-time working moment values of detection, tower crane control system controls tower crane and luffing and raising rising operation cannot move outward
Make.The utility model is solved with this to carry out the readily removable of torque limitation using several switching points in industry and removes and unsafe problems,
And the problem that the precision of analog quantity limiter of moment is low, stability is poor, of high cost, improve signal anti-interference ability and detection
Precision.
Claims (4)
1. a kind of tower crane moment limiter, it is characterised in that：Including the arcuate plate being fixed on tower crane steel structure（1）Bend with being fixed on
Template（1）On shell（5）；The shell（5）Interior be equipped with is fixed on arcuate plate（1）On foil gauge（3）；The foil gauge
（3）It is connected with circuit conversion device（8）, circuit conversion device（8）Connect bus communicating devices（6）；The shell（5）Inside also set
Have and multiple is fixed on arcuate plate（1）On microswitch（9）；In shell（5）On be equipped with and microswitch（9）Opposite is used for
Collide microswitch（9）Touching device（2）.
2. tower crane moment limiter according to claim 1, it is characterised in that：The microswitch（9）There are four altogether, and
It arranges in a row；Microswitch（9）It is connected with cable（4）.
3. tower crane moment limiter according to claim 1, it is characterised in that：The shell（5）It is equipped with lead-sealing lock
（7）.
4. a kind of safety control system of the tower crane moment limiter described in claim 2；It is dynamic including control tower crane lifting operation
The lift controlling system of work turns round the rotary control system of run action for controlling tower crane, for controlling the operation of tower crane luffing
The luffing control system of action sends out run action control to lift controlling system, rotary control system and luffing control system
The control device of order, and the control device for operating control device；Bus communication fills in the tower crane moment limiter
It sets（6）And microswitch（9）It is connected to control device；
The safety control system further includes being connect with control device for showing tower crane operating parameter, parameter setting and alarm
The display device of information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820176275.4U CN207844955U (en) | 2018-02-01 | 2018-02-01 | A kind of tower crane moment limiter and its safety control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820176275.4U CN207844955U (en) | 2018-02-01 | 2018-02-01 | A kind of tower crane moment limiter and its safety control system |
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| Publication Number | Publication Date |
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| CN207844955U true CN207844955U (en) | 2018-09-11 |
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ID=63414281
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820176275.4U Active CN207844955U (en) | 2018-02-01 | 2018-02-01 | A kind of tower crane moment limiter and its safety control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108128716A (en) * | 2018-02-01 | 2018-06-08 | 徐州建机工程机械有限公司 | A kind of tower crane moment limiter and its safety control system, method |
-
2018
- 2018-02-01 CN CN201820176275.4U patent/CN207844955U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108128716A (en) * | 2018-02-01 | 2018-06-08 | 徐州建机工程机械有限公司 | A kind of tower crane moment limiter and its safety control system, method |
| CN108128716B (en) * | 2018-02-01 | 2024-05-28 | 徐州建机工程机械有限公司 | Tower crane moment limiter and safety control system and method thereof |
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