Drawer switch is also known as an emergency stop switch and is a switch sensor ( That is, the non-contact travel switch) is an essential safety protection device for the belt conveyor. When the belt conveyor needs to stop, the conveyor is stopped by the switch action. This encyclopedia mainly introduces the rope switch in several aspects such as the type of rope switch, the principle of the rope switch, the characteristics of the rope switch, the use of the rope switch, the installation of the rope switch, and the picture of the rope switch.
1, type of rope switch
The drawstring switch can be mainly divided into manual reset and automatic reset, and needs to meet the national IP rating.
First, automatic reset: can automatically return to the initial position after completing the action, but may cause the error to start.
Second, manual reset: After the action is completed, the self-locking device is kept in the operating position, and the reset handle needs to be manually operated to return it to the initial position.
2, the principle of the rope switch
The rope switch is mainly composed of a tie rod, a cam, a reset handle, a lock groove, a micro switch and the like.
The rope switch is mounted on the frame on both sides of the belt conveyor, and the wire rope is used to connect the switches along both sides of the conveyor equipment. In the case of an emergency in the conveyor belt equipment, the wire rope is pulled anywhere along the conveyor. The wire rope will pull the drive arm to start rotating, and the torsion spring will be driven by the transmission shaft, so that the precise cam will be displaced and the two-way rope switch will be driven to cut off. The line realizes the conveyor to stop running quickly.
3, pull rope switch features
First, the rope switch adopts aluminum alloy precision casting shell, which is light in weight and high in strength.
Second, the rope switch has an enclosure rating of IP65 and can work in harsh environments.
Third, the use of imported micro-switch contact, large capacity, the rope switch action is flexible and reliable.
4, the use of rope switch
First, the rope switch is widely used in belt conveyors, shuttle conveyors, skirt conveyors, bucket elevators, packaging production lines, stock picking systems, cranes, excavators, ship handling systems, horizontal Equipment for emergency stop on-site equipment such as feeders.
Secondly, because the rope switch has the characteristics of the stroke switch and the micro switch, and has the sensing performance, and the action is reliable, the performance is stable, the frequency response is fast, the service life is long, the anti-interference ability is strong, and the waterproofing is good. Shockproof and corrosion resistant, it is widely used in belt conveyor conveying systems used in mining, machinery, textile, printing, chemical, metallurgy, valves, light industry, electric power, security, transportation, railway, port, cement and other industries. .
5, pull rope switch installation
First, the rope switch should be installed at the inspection access line on both sides of the conveyor. The installation position should ensure that the maintenance personnel can easily operate in an emergency.
Second, fix the rope switch to the rack.
Third, the distance between the two switches on each side is about 50m, and the wire rope with the diameter of Φ4 is connected, and the elasticity should be kept moderate.
Fourth, in order to reduce the influence of the self-weight of the wire rope on the start of the switch, a bracket should be installed on the frame every 3m to support the wire rope.
Fifth, the other end of the wire rope is attached to the tension spring and fixed with a rope buckle. When the normal use is not affected, the tension ropes are used to tension the two side ropes to ensure the tension on both sides is balanced.
