What is a door closer? The door closer is a spring-like hydraulic device on the door head. When the door is opened, it can be compressed and released to automatically close the door. It has the function of a spring door and can ensure that the door is closed to the initial position accurately and in time after it is opened.
The working principle of the door closer is:
When the door is opened, the door body drives the connecting rod to move, and the transmission gear is rotated to drive the rack plunger to move to the right. When the plunger moves to the right, the spring is compressed, and the hydraulic oil in the right chamber is also compressed. The one-way valve ball on the left side of the plunger is opened under the effect of oil pressure, and the hydraulic oil in the right cavity flows into the left cavity through the one-way valve. When the door opening process is completed, because the spring is compressed during the opening process, the accumulated elastic potential energy is released, and the plunger is pushed to the left, driving the transmission gear and the door closer connecting rod to rotate, and the door is closed. If the door closing force is too large, it will seriously affect the service life of the door, especially the sliding door, so how do we use the door closer to adjust the closing force of the sliding door? We can divide it into the following three steps.
Step one:
The door closer can only be installed on the upper part of the sliding door leaf near the hinge side. There is one end of the speed regulating screw on the body, facing the hinge. Otherwise, the door will not be opened normally. If it is destroyed, use four screws to fix the body on the door leaf, then put the lever into the upper end of the gear shaft, install the cap on the other end, and tighten the fastening screws.
Step two:
Install the connecting rod, and fix the connecting rod on the door frame with two screws. The hand-held connecting rod is at right angles to the upper door frame. Loosen the lock nut, adjust the connecting rod to a suitable length, gently move the lever, so that the lever pin is just inserted into the hole at the end of the connecting rod, and check that the connecting rod is at right angles to the upper door frame. Put the washer on and fasten with button head screws. Lock the nuts and the installation is complete.
Step three:
Adjust the closing speed of the sliding door. The closing speed has been adjusted. If the speed needs to be changed, turn the speed adjusting screw as shown in the figure.
What problems should the hydraulic door closers pay attention to when adjusting the closing force of the sliding door?
(1) The exterior-mounted top door closer is not suitable for two-way opening doors.
(2) The speed adjustment screw controls the opening and closing speed of the door. Clockwise is slow, counterclockwise is fast.
(3) The rest of the screws and sealing parts cannot be twisted at will to prevent oil leakage.
Author:Written by Ms.Vivian He from S4A INDUSTRIAL CO.,LIMITED
Factory Address:Building S4A, South Third Lane, Qiuyuling Street, Zhangkeng Village, Hengli Town, Dongguan City, Guangdong Province Office Address:#601,floor 6 ,building 1,JINFANGHUA industrial zone, Bantian St. Longgang Dist. Shenzhen, PRC.
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