Linked air door bottom threshold

Abstract

The invention provides a linked air door bottom threshold, which comprises a base, wherein a bottom threshold is hinged on the base, the front side of the base is fixedly connected with a fixing plate, the front end of the fixing plate is hinged with a connecting rod, one end of the connecting rod is hinged with an air door transmission rod, the other end of the connecting rod is hinged with a connecting rod, the other end of the air door transmission rod is fixedly connected with an air door transmission hook, a through hole is formed in the base, the air door transmission rod passes through the though hole, the air door transmission hook is positioned at the back side of the base, the other end of the connecting rod is hinged and connected with the bottom threshold, and a spring is fixedly connected between the back end of the fixing plate and the front end of the connecting rod or between the back end of the fixing plate and the other end of the connecting rod. The upper side of the base is hinged with the bottom threshold through a hinge. The connecting rod and the bottom threshold are hinged and connected through a connecting iron block. The linked air door bottom threshold is connected into a whole with an air door, when the air door is opened, the air door drives the connecting rod, and the connecting rod drives the bottom threshold, so the bottom threshold is flatly turned, the air door is opened, and pedestrians or vehicles can pass. After the pedestrians and the vehicles pass the air door, the connecting rod drives the hinge, so the bottom threshold stands up, and the air door bottom threshold effect is realized.

Description

technical field [0001] The invention relates to a mine ventilation safety device, in particular to a linkage damper bottom sill. Background technique [0002] In the coal mine underground ventilation system, the damper is one of the main ventilation facilities, and more than two damper facilities must be installed in the passage connecting the main air inlet and return lanes and the connection lane connecting the inlet and return air lanes. At present, the damper sills used in mines include rubber sills and cement sand-ash sills. Although the rubber sills can be used repeatedly, the cost is relatively high, which is not conducive to the development of the "two lifting and one lowering" work. The adaptability of the sand-gray bottom sill is not good, and it is easy to break after being hit by objects and rubbed back and forth by the winch rope. It needs to be repaired and remade frequently, and the effect of preventing wind leakage is not ideal. [0003] No matter what kind ...

AI Technical Summary

Problems solved by technology

At present, the damper sills used in mines include rubber sills and cement sand-ash sills. Although the rubber sills can be used repeatedly, the cost is relatively high, which is not conducive to the development of the "two lifting and one lowering" work. The sand-gray bottom sill has poor adaptability. It is easily broken after being hit by objects and rubbed back and forth by the winch rope. It needs to be repaired and remade frequently, and the effect of preventing wind leakage is not ideal.

[0003] No matter what kind of damper sill is installed and used, the frequent opening and closing of the damper and the collision of the vehicle will have a greater impact on the air leakage prevention effect of the damper sill. The air leakage will affect the ventilation quality of the mine, which is not conducive to the safe production of the mine, and even cause major economic losses to the coal mining enterprises.

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