The main command switch of the construction hoist is one of the important control elements in the construction hoist, and its function is to control the start, operation and stop of the hoist according to the instructions of the operator. This article will introduce in detail the characteristics, types, working principles and maintenance of the main command switch of the construction hoist.
First, the characteristics of the main order switch of the construction hoist.
The main order switch of the construction hoist has the following characteristics:
1.Compact structure, small size, easy installation;
2.Easy to operate and responsive;
3.It has good reliability and durability, and can withstand the harsh environment of the construction site;
4.It can be used with a variety of controllers to achieve a variety of control functions.
Second, the type of main order switch of the construction hoist.
The main types of main switches for construction hoists are as follows:
1.Cam master switch: Cam master switch is a common construction hoist master switch, which triggers the rotation of the planetary gear through the rotation of the cam, so as to control the lifting action of the lift. This kind of switch has the advantages of simple structure, easy operation and affordability, but the life is short, and the cam needs to be replaced regularly.
2.Rotary master switch: Rotary master switch is a kind of construction elevator master switch with motor as the power source. The rotation of the motor drives the rack and pinion to move up and down, so as to control the lifting action of the elevator. This kind of switch has the advantages of high control accuracy, good stability and long life, but it is high and needs to be maintained by professionals.
3.Button master switch: Button master switch is a construction elevator master switch that controls the lifting action of the elevator through the button. This kind of switch has the advantages of easy operation and sensitive response, but it needs to be used with other controllers, and the control function is relatively simple.
Third, the working principle of the main order switch of the construction hoist.
The working principle of the main command switch of the construction hoist is to convert the mechanical energy into an electrical signal through the instructions of the operator to control the start, operation and stop of the hoist. Specifically, when the operator presses the corresponding button, the contact inside the main switch will be turned on or off, so as to control the motor operation of the elevator and realize the lifting action of the elevator. At the same time, the main switch can also adjust the speed or direction of the motor through internal adjustable resistors or capacitors and other components to achieve a variety of control functions.
Fourth, the maintenance of the main order switch of the construction elevator.
In order to ensure the normal use of the main command switch of the construction hoist and prolong its life, regular care and maintenance are required. The specific maintenance methods are as follows:
1.Regularly clean the dust and debris on the surface of the main switch and keep it clean;
2.Check whether the wiring of the main switch is loose or fall off, and if there is any abnormality, it should be dealt with in time
3.Check whether the contacts inside the main switch are in good contact, and clean them in time if there is oxidation or dirt
4.Inspect and replace the cam of the cam master switch to ensure its normal operation
5.Regularly inspect and maintain the motor and rack and pinion of the rotating master switch to ensure that it is working properly
6.Avoid using the main command switch of the construction hoist in a humid or high temperature environment, so as not to affect its normal operation and service life.
In short, the main command switch of the construction hoist is one of the important control elements in the construction hoist, and its normal operation and maintenance are very important to ensure the safe and stable operation of the construction hoist. Therefore, the inspection and maintenance of it should be strengthened in daily use to ensure its normal operation and service life.