Waterproof limit switch, as the name suggests, can be waterproof, no matter from which Angle there is water splash can achieve protective effect, is a special occasion, the use of harsh environment of the main electrical command.
Waterproof limit switch, also known as waterproof travel switch, in the electrical control system, the role of the position switch is to realize the sequence control, positioning control and position state detection. Used to control the stroke and limit protection of mechanical equipment. Construction: Consists of an operating head, contact system and a housing
In actual production, the limit switch is installed in the pre-arranged position. When the module installed on the moving parts of the production machinery hits the limit switch, the contact of the limit switch acts to realize the circuit switching. Therefore, the limit switch is an electrical appliance that switches circuits according to the travel position of the moving parts, and its principle of action is similar to that of the push button switch.
The control circuit can be switched on or off by the contact action of the moving parts of the production machinery. Usually, this kind of switch is used to limit the position or stroke of the mechanical movement, so that the moving machinery according to a certain position or stroke automatically stop, reverse movement, variable speed movement or automatic round-trip movement. The control circuit can be switched on or off by the contact action of the moving parts of the production machinery. Usually, this kind of switch is used to limit the position or stroke of the mechanical movement, so that the moving machinery according to a certain position or stroke automatically stop, reverse movement, variable speed movement or automatic round-trip movement.
Direct acting travel switch
The principle of action is similar to that of a button, except that one is manually operated and the other is hit by a bumping block of a moving part. When the bumping block on the external moving part presses the button to make its contact move, when the moving part leaves, under the action of the spring, its contact automatically reset. Take the commonly used SZ-3112 product as an example.
Direct acting travel switch composition
1: push rod 2: spring 3: breaking contact 4: moving contact
Roller type travel switch
When the retaining iron (bump block) of the moving machinery presses on the roller of the travel switch, the transmission lever rotates together with the rotating shaft, so that the CAM pushes the bump block. When the bump block presses to a certain position, the micro switch is pushed to move quickly. When the retainer on the roller is removed, the return spring resets the travel switch. This is a single wheel automatic recovery stroke switch. And the two-wheel rotary travel switch can not automatically recover, it is to rely on the movement of the mechanical reverse movement, stop the iron collision with another roller will be its recovery. Take the commonly used product SZ-3108 as an example:
Application situation:
Coating equipment, hydraulic equipment, shield equipment, rail transit, open-air equipment and so on the protection level of some of the relatively high requirements of the equipment and the need for waterproof, oil, dust resistance of high-grade occasions
