The belt sway switch has the characteristics of simple structure, small size, light weight, convenient installation and adjustment, fast moving speed, stable safety and reliability, etc., which enables the belt conveyor to operate safely in a harsh production environment for a long time. In the case of failure, the position of the fault point can be indicated on the operation platform, and an alarm signal is issued to prompt the staff to repair in time, thereby greatly reducing the fault finding time and improving work efficiency. 1 The choice of the belt sway switch
Because the switch body is the core component of the device. Therefore, the choice of the belt sway switch is a very important part. In addition to the strict explosion-proof performance, it is required to be stable and reliable, and to be able to adapt to the wet environment of the well. And at the same time should meet the needs of protection and system signals. According to the experience, it is recommended to select the kycx-1 type mine permanent magnet limit switch as the main original. The permanent magnet is used together with the permanent magnet limit switch. The magnetic induction principle is adopted to make the internal switch action and achieve the purpose of contact opening and closing. The control of the circuit completely overcomes the characteristics of poor contact and easy damage of the mechanical collision switch.
2 The maintenance of the belt sway switch
Because the coal mine is dark and damp and dusty, it will seriously affect the normal service period of the equipment. Therefore, strict dust proof, waterproof and rust-proof measures are the key to the long-term safe operation of the device. First of all, in the design and manufacture of the bracket, it is required to have both a certain mechanical strength and corrosion resistance, and the rotating shaft is also selected as a nylon material. Since the rotating wheel is made of a metal material, it is more important to prevent corrosion and rust in the production, and the bearing adopts a high-performance waterproof bearing. In addition, a rust-proof paint is sprayed on the surface, and a wear-resistant sealing rubber cover is added to the outside of the rolling wheel. In the selection of the belt sway switch, the dust proof, waterproof and rust-proof performance are first considered. Only when these problems are solved can the switch be reliably and safely operated.
3 The use of the belt sway switch
Belt sway switch is composed of a switch bracket, a moving link, a magnet block and a magnetic sensor switch. The movable connecting rod is mounted on the switch bracket via the support shaft, the upper part of the switch bracket is inclined inward by 60 to 70°, the moving link is hinged with the support shaft, and a rolling shaft is mounted on the upper end of the moving link, and the magnet block is fixed to the moving link by bolts At the lower end end, a magnetic induction switch is arranged under the magnet block; the upper part of the moving link is inclined inwardly at the same angle as the upper part of the switch bracket; the switch bracket is mounted on the belt conveyor frame via a fixed seat, and the moving link is The direction of the conveyor belt is inclined, and the side of the conveyor belt should be perpendicular to the rolling axis at the upper end of the moving link. Under normal circumstances, the switch is in the rest position. When the conveyor belt is deflected, the edge of the conveyor belt will touch the rolling axis, and an outward force is applied to the rolling shaft to displace the moving link. The displacement of the magnet block causes the magnet block to deviate from the magnetic induction switch, while the magnetic induction switch sends a stop and alarm signal. Belt sway switch is installed on both sides of the belt conveyor frame and is directly connected to the frame by means of coupling screws. The installation amount can be determined according to the actual situation on the site. The output leads are connected to the busbar of the belt conveyor frame, regardless of Which part of the conveyor belt is deflected and transmitted to the console through the bus.