The Wireless Remote Control Of The Crane Is Packaged And Sent To Türkiye
Apr 22, 2023
The wireless remote control of the crane is packaged and sent to Türkiye
Product name: wireless remote control
Product Quantity: 10
Safety requirements for wireless remote control of cranes
1. The crane using wireless remote control should have various protection functions of the original crane, such as zero position, overcurrent, stroke and other protections.
When the remote control uses non-automatic reset joysticks, it is required that all joysticks should be at zero position before the operation can issue control commands.
When the master controller and contactor are in control, the master controller must be in zero position before the remote controller can connect to the main power network of the crane.
When the crane unexpectedly loses power, the remote control should stop working.
When the power supply is restored, the remote control must go through the correct start-up procedure to connect to the main power circuit of the crane.
When the power supply voltage of the remote control is insufficient. It shall be possible to issue a stop command through the white control function.
2. Cranes using wireless remote control should be equipped with a main contactor or an air circuit breaker that trips under pressure to cut off the main power supply of the crane.
The power supply of all institutions must be drawn out from the outlet of the main power contactor.
The action of the main power contactor or the circuit breaker with a voltage loss trip line should cut off the main power supply of all institutions and stop the operation of all institutions.
3. The crane adopts wireless remote control.
There should be an obvious remote control indicator light on the crane, indicating that the machine is operated by remote control.
4. When a crane is operated by both the remote control and the driver's cab, the interlocking between the two should be realized.
A transfer switch must be set at the entrance of the driver's cab.
5. The forward and reverse running relays and contactors should have electrical interlock.
If necessary, mechanical interlocking can be added to the contactor, and the forward and reverse running codes of the motion mechanism in the receiving processor should have software interlocking.
6. The radio remote control system should have the ability to resist co-frequency interference signals, and no misoperation is allowed when receiving co-frequency interference.
The control receiving end is directly connected with the strong current system, and there will be a lot of various interferences, so its reliability and anti-interference performance are very important, which are the basis for the system to be put into use.
Since the output of the system is to drive the relay and the contactor to control the operation of the motor, it is necessary to isolate the weak current and strong current systems.
Because the interference in the industrial field is too great, there is often pulse interference, so attention should be paid to the selection of the receiver chip at the control end.
The receiving sensor is connected to the receiver host with a cable, and the cable should have a good shielding function.
The receiving sensor should be able to work normally when the illuminance of sunlight is 80001x, the light is 20001x, and the distance from the welding arc is greater than 6m. When it exceeds, it can refuse to act and give an alarm or passive emergency stop, but there is no malfunction.
7. The shell of the receiver and the intermediate relay box should be reliably connected with the steel structure of the crane.
8. Safety requirements for the emergency stop function of the wireless remote control device.
The emergency stop function includes active emergency stop and passive emergency stop.
Active emergency stop means that the driver sends an emergency stop command through the transmitter, cuts off the main power supply on the crane, and stops the movement of various mechanisms of the crane.
Passive emergency stop means that when the receiver fails to detect a normal signal within a certain period of time or the receiver (control system) fails, it can cut off the power supply of the channel and stop the operation of the various mechanisms of the crane.
In order to prevent misoperation, the active emergency stop switch should not be automatically reset. The driver sends an active emergency stop command through the transmitter until the receiver intermediate relay control terminal outputs the active emergency stop command. The required time should be less than 0.5s.
This command cuts off the main power supply and is the highest priority. When no high-frequency carrier or data signal is detected, the passive emergency stop function should be implemented, and the total power supply of the channel must be cut off within 1.5s. When the sudden noise interference of the channel exceeds ls or the correct address cannot be detected at ls When coding, the channel power should be cut off.
