Auxiliary door opening device, air door and ventilation system

Abstract

The invention provides an auxiliary door opening device, an air door and a ventilation system. The auxiliary door opening device comprises a first connection rod, a second connection rod and a third connection rod which are sequentially and fixedly connected. The first connection rod serves as a power arm, the second connection rod serves as a support arm, and the third connection rod serves as a resisting arm. The force arm length of the first connection rod is larger than that of the third connection rod. The auxiliary door opening device is used for being installed on the positive pressure side of the air door, the second connection rod is used for being connected with a door sash in a rotating mode, the other end of the third connection rod abuts against a door frame, and the third connection rod is used for abutting against the second connection rod under the drive of the first connection rod to drive the door sash to be away from the door frame; or the auxiliary door opening device is used for being installed on the negative pressure side of the air door, the second connection rod is used for being connected with the door frame in a rotating mode, the other end of the third connection rod abuts against the door sash, and the third connection rod rotates around the second connection rod under the drive of the first connection rod to abut against the door sash to be away from the door frame. By means of the auxiliary door opening device, the air door can be opened easily and conveniently.

Description

technical field [0001] The invention relates to mine ventilation structure technology, in particular to an auxiliary door opening device, a damper and a ventilation system applied in a high negative pressure state. Background technique [0002] The ventilation system is one of the essential safety facilities in the mine production process. The ventilation system includes air ducts and dampers set in the air ducts. The damper includes a door frame fixedly arranged in the air duct, and a door leaf whose side edge is pivotally connected with the door frame. The function of the damper is to control the air volume and wind speed in the air duct to ensure that the wind speed and air volume at the operating point meet the requirements of safety regulations; in addition, the damper can also play a certain blocking role in the event of reverse wind. [0003] During actual operation, the damper often needs to be opened so that workers can pass through. However, since most of the dam...

AI Technical Summary

Problems solved by technology

In actual production, the pressure difference on both sides of the damper is too large, the damper is in a normally closed state, and it is difficult to open from the negative pressure side to the positive pressure side, making it difficult for personnel to pass through, and it is easy to cause accidents caused by the damper.

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