The triple roller gate is an efficient and safe control product for pedestrians. The three-roll gate of Zhongmu Channel can establish a very safe traffic environment and is widely used in tourist attractions, office buildings, office buildings, schools, gymnasiums, docks, railways, and high-grade communities.
The three-roll gate core is mainly composed of a main shaft, an electromagnet, a toothed cam, a positioning cam, a travel switch, a damper, a spring, and a lever dropping device.
Locking device
The locking action is achieved by the head of the locking arm catching the teeth of the set of toothed cams.
The polyurethane toothed cam, which is part of the toothed cam set, reduces the noise generated by the locking arm acting on the cam tooth. The profile of the cam makes it possible for the spindle to be locked at intervals of 5 seconds during rotation. (do not push the card)
The lock arm is pivotally mounted to the base and can be swung by the pull-in of the electromagnet mounted on the base. One of the solenoids locks clockwise and the other locks counterclockwise.
Excitation of the electromagnet causes the lock arm to move and mesh with the cam teeth to prevent the three roller gate from rotating in this direction. When the electromagnet is powered off, the locking arm returns to its original position under the action of the spring and catches the cam.
Anti-reversal device
The function of the anti-reversal device is to prevent the rotation unit from rotating in the opposite direction to the original direction. That is, once the three arms are rotated in one direction, the device will prevent it from rotating in the opposite direction.
In the figure, the locking arm 1# quickly moves left to the limit position by the electromagnet, and unlocks the toothed cam 1#. At this time, the locking arm 2# does not move, and the rotation of the toothed cam 2# in the opposite direction is still restricted.
Positioning cam
The positioning cam is a guide rail with a special profile (as shown below). In the guideway, the three points that are the shortest from the center of the circle are spaced 120 degrees apart and they correspond to the three fence positions of the three bars. These three points are connected by three trajectories rising and falling.
The three lever arm drives the positioning cam to rotate, driving the two positioning rods to move in a straight line. One end of the rod is connected to the bearing and the other end is connected to a damper (one of the connection springs).
Once the bearing passes the apex of the cam track, the pressure created by both the spring and the damper causes the rotation unit to continue to rotate until the three arm returns to the fence position. The pretension of the spring can be adjusted by the screw.
Damper
The function of the damper is to adjust the spring force and buffer the entire rotation process. During the first half of the rotation (ie, the lift in the positioning cam), the damper expands; during the second half of the rotation (ie, the descent), the damper contracts. During the entire rotation process, the damper exerts a buffering effect in proportion to the rotation speed, and the scale of the oil pressure can be adjusted according to the magnitude of the force, 1-8 (from small to large and vice versa to small).
Limit switch
The function of the limit switch is that when the brake lever rotates to a certain angle (about 110 degrees), the limit switch on the resetter reaches the screw shown in the figure, automatically detects an in-position signal and sends the signal to the three-roller gate drive board.
Gate (dial)
The turntable is mounted on the main shaft by three bolts. It consists of three brake levers, three rotary blocks and a drop lever with spring plate. In the absence of a lever, the angle between the three brake levers is equal, one of which remains horizontal and acts as a barrier.
Drop device
As shown in the following figure, the electromagnetic device is mounted on the bearing seat 2#. Under power-on condition, it does not interact with the rotating block. At this time, the spring gives a force to the rotating block to make it catch the brake lever and cannot drop the lever. When this device is activated, the electromagnet is disconnected from the power supply, hits the rotor, and is released from the gate, creating a certain gap.
The brake lever is vertical under the effect of its own gravity, so that the aisle can run smoothly.
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Jiangmen City Pengjiang District Qihui Lighting Electrical Appliances Co., Ltd , https://www.qihuilights.com