MMB series mining with closed door

Introduction of MMB series of closed-door mining products

The MMB series mines are closed for use in underground main substation and main drainage pump room access to the truck yard at the bottom of the well, easy to close to prevent sudden water immersion.The pressure of the close door is 98KPa.The door door of the close door is welded with flat steel plate, well double rib plate and ring beam.The door frame is combined frame structure of channel steel and i-steel.The tension device is wedge - shaped slide wedge.The door pivot is supported by rolling bearings.A close door is a door that increases air tightness.The material of the close door is made of wood and steel.The key component is the sealing device.

MMB series of mining close - door main structure

1. The closed door door of MMB series of mines is made of flat steel plate, well double rib plate and ring beam.

2. The door frame is composed of channel steel and i-steel.

3. The tensioning device is wedge - shaped slide wedge.

4. The door pivot is supported by rolling bearings

MMB series mining closed - door working environment

1. Atmospheric pressure: 80kPa ~ 110kPa;

2, environmental temperature: - 30 ℃ to 40 ℃;

3, the average relative humidity of 95% or less (25 ℃);

4. Underground coal mine with mixture of methane and coal dust explosibility;

5. No gas sufficient to corrode and damage the insulation of metal shell and electric appliance;

6. Water pressure: 0 ~ 3.5mpa.

Technical parameters of close - door for MMB series mining

Model example: serial number model specification

1 MMB1.4 * 1.8 1123

2 MMB1.6 * 1.8 1194

3 MMB1.8 * 2.0 1319

4 MMB2.1 * 2.0 1430

MMB series mining closed-door notes

(1) check the concentration of gas, carbon dioxide and other harmful gases at the construction site.The construction site must be well ventilated, and the concentration of gas and carbon dioxide shall not exceed the provisions of coal mine safety regulations.

(2) check the supporting conditions of the roof and roadway side of 5m before and after the construction site, report and deal with any problems as soon as possible, and then the construction can be carried out without any hidden dangers.

(3) the periphery of the wall should be re-cut to see hard top and hard side and be connected with coal rock;There are no cracks, restitching or gaps in the wall surface.The following points should be noted when cutting:

(4) it shall pass the cable line in the fire door and closed door wall, reserve the hole mouth position when laying the wall, and set the cable pipe and arrange the cable suspension spacing in order when the cable passes.

(5) fire doors and closed-door walls shall be constructed of non-combustible materials and strictly free of air leakage.When building a brick wall, the stubble should be staggered, transverse joints should be horizontal, the arrangement must be neat.Mortar is prepared according to the proportion of 1:3 ash and sand.