Multiple buffer rising shaft explosion-proof door

Abstract

The invention belongs to mine underground ventilating equipment and in particular relates to a multi-buffering and rising vertical shaft explosion-proof door. The multi-buffering and rising vertical shaft explosion-proof door comprises two blades, a gear, a buffering seat, a guide column, buffering boxes, a buffering limiting cylinder, an upper guide seat, a foundation seat, a hinge, a wedge-shaped beam and a lower guide seat, wherein the two buffering boxes are respectively sleeved on shoulder parts at the two ends of the buffering seat; the bottoms of the two buffering boxes are put on a wellhead foundation; the tops and the bottoms of the buffering boxes are not in contact with the buffering seat; and only after the buffering seat rises for a section of distance, the buffering seat comes into collision with the buffering boxes. According to the invention, energy of explosion impact waves are consumed for multiple times by using a multi-buffering device and the impact force on the guide column, and the foundation is divided into twice. The peak impact force of the guide column on the wellhead foundation during the rising the buffering seat is greatly reduced, the civil engineering requirements and the building cost of the wellhead foundation are reduced, and the foundation seat is simply, reliably and economically fixed.

Description

technical field [0001] The invention belongs to underground ventilation equipment in coal mines, in particular to a shaft explosion-proof door whose door leaf can rise with a buffer seat. technical background [0002] In the underground ventilation equipment of coal mines, the existing shaft automatic reset explosion-proof door, once a gas explosion occurs, the limit device and foundation of the shaft explosion-proof door must bear the impact and tension caused by the rise of most of the fan blades and buffer seats, which will affect the shaft explosion-proof The basic civil engineering requirements of the door are relatively high. And there is the following problem: [0003] 1. Due to the limitation of the space layout of the coal mine ventilation wellhead, the infrastructure cannot be enlarged indefinitely, which will lead to unreliable fixing of the explosion-proof door of the shaft, and at the same time, excessive expansion of the infrastructure itself will lead to exce...

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Problems solved by technology

[0003] 1. Due to the limitation of the space layout of the coal mine ventilation wellhead, the infrastructure cannot be enlarged infinitely, which will lead to unreliable fixing of the explosion-proof door of the shaft, and at the same time, excessive expansion of the infrastructure itself will lead to excessively high basic costs

[0004] 2. If the automatic reset explosion-proof door of the shaft adopts a very long guide column to ensure that the kinetic energy of the buffer seat and the fan blade has time to be fully converted into potential energy, the guide column and the foundation seat are only subject to the frictional force on the guide column when the buffer seat rises , but the higher the buffer seat rises, the higher the equipment cost will be, and the greater the impact on the foundation when the buffer seat falls back, it will also cause damage to the foundation, and it is necessary to increase the infrastructure

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