Waterproof and closed door

Introduction to watertight doors

The watertight door is used in the access to the underground main substation and main drainage pump room to the underground yard and is easily closed to prevent sudden water immersion. The maximum pressure of this closed door is 98KPa.

The closed door is welded by flat steel plate, shaft reinforcement plate, ring beam and so on. The door frame is a combination frame structure of channel steel and I-steel. The tensioning device is wedge - shaped slide block. The door hinge is supported by rolling bearing. A closed door is a door that increases air tightness. Closed doors are made of wood or steel. The key component is the sealing device.

Main structure of watertight door

1. The closed door is welded by flat steel plate, shaft reinforcement plate, ring beam, etc.

2. The door frame is channel steel and I-steel combined frame structure.

3. The tension device is wedge-shaped slider wedging.

4. The door hinge is supported by rolling bearing.

Waterproof and closed door working conditions

1. Atmospheric pressure: 80kPa ~ 110kPa;

2. Ambient temperature: -30℃ ~ 40℃;

3. Average relative humidity ≤ 95% (25℃);

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

5, there is no gas enough to corrode and destroy the insulation of metal shell and electrical appliances;

Main specifications of waterproof and closed door

Precautions for waterproof and closed door construction

(1) Check the concentration of gas, carbon dioxide and other harmful gases in the construction site. The construction site must be well ventilated and the concentration of gas and carbon dioxide gas shall not exceed the provisions of the Coal mine Safety Regulations.

(2) Check the roof and roadway support of 5m before and after the construction site, report and deal with the problems in time, and carry out construction only after there is no hidden danger.

(3) Around the wall, the hard top and hard top should be cut out again and connected with coal and rock; The wall is smooth without cracks, re-seam and empty seam. The following points should be noted when cutting:

(4) It is necessary to pass through the cable line in the fire door and the closed door wall. When building the wall, it is necessary to reserve the position of orifice. When the cable passes through, it is necessary to set the cable pipe and arrange it in order according to the cable suspension spacing.

(5) Fire doors, closed doors wall to use non-flammable materials construction, tight no air leakage. When building a brick wall, the stubble should be staggered, the transverse cracks should be horizontal, the arrangement must be neat. Mortar is prepared according to the proportion of 1:3 ash and sand.

(6) In the process of laying fire doors and closing doors, other personnel are strictly forbidden to approach the operator to prevent tools and materials from falling down and injuring the personnel

Physical drawing of watertight door