A variable quality system and control method for explosion-proof doors of vertical wind shafts

Abstract

The invention discloses a variable mass system of vertical air shaft explosion door and a control method thereof; the variable mass system of vertical air shaft explosion door comprises a main water tank, a water pump and variable mass water tanks which are connected by pipelines; a water knockout trap is arranged inside the pipeline between the main water tank and the variable mass water tanks; the water knockout trap is respectively connected with a plurality of variable mass water tanks by pipelines; the pipelines between the water knockout trap and the main water tank form a pipe range for supplying and discharging water of the variable mass water tanks; the water pump is installed in the pipe range. The variable mass system of vertical air shaft explosion door can not only achieve fast supplying and discharging water of the vertical air shaft explosion door variable mass system, but also can achieve slow supplying and discharging water of the vertical air shaft explosion door variable mass system, can further precisely control the mass variations of mass portions, thereby ensuring stably resetting or lifting the vertical air shaft explosion door, saving time, and being safe in operation.

Description

technical field [0001] The invention belongs to the technical field of mine safety protection, relates to a variable quality system for explosion-proof doors of vertical wind shafts, and also relates to a control method for the variable quality system. Background technique [0002] The explosion-proof door of Lifengshaft is an important facility for coal mine ventilation safety. The explosion-proof door, also known as the explosion-proof cover, is installed on the wellhead platform on the same axis as the air outlet shaft. The function of the explosion-proof door is mainly reflected in the following aspects: (1) When the mine is normally ventilated, the explosion-proof door can maintain airtightness and avoid the short circuit of the air flow; Due to the impact of air waves, the explosion-proof door can be opened instantly to release pressure to protect the main ventilator from damage; (3) after a gas or coal dust explosion occurs in the mine, the explosion-proof door can b...

AI Technical Summary

Problems solved by technology

The core problem encountered in the use of the explosion-proof door of Lifengshaft is that the existing explosion-proof door of Lifengshaft cannot be reset or is difficult to reset

[0004] In order to solve this problem, the traditional solution is to change the mass of the hammer assembly by adding or subtracting the weight block to realize the adjustment of the mass relationship between the explosion-proof door body and the weight assembly. Theoretically speaking, this traditional method It is feasible, but there are many technical defects that are difficult to overcome in the actual operation

For example, (1) when the explosion-proof door body rises to a certain height, the upper wellhead of the air shaft is open, and the mine uses natural wind pressure for ventilation. On-site personnel work at high places above or near the air shaft mouth, which is prone to fear and poses a safety hazard

(2) The height of the hammer assembly from the ground generally exceeds the height of a person, and the on-site personnel work at a high place, which poses a safety hazard

(3) The weight of each heavy hammer block is generally heavy, and must be removed symmetrically from two or four sets of heavy hammer assemblies at the same time, otherwise it will inevitably cause the door body of the explosion-proof door to tilt, which is difficult to operate and takes a lot of time and the problem of overstaffing

[0007] The design concept of the patent document CN101943025A is basically consistent with the idea of ​​changing the weight of the hammer assembly by filling and discharging water, and has a certain degree of advancement. It satisfies the construction requirements of rapid reset or lifting of the explosion-proof door of vertical wind shaft well, which is not conducive to the protection of the explosion-proof door body and lifting bracket

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