Closed door series

Close door series product introduction

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.

The series of close door can be divided into: underground close door, pressure free air door, fire and waterproof gate and shock resistant door.

Close door series structure

1. The door door with closed door is welded by a combination of flat steel plate, well plate and ring beam.

2. The door frame of the closed door is a frame structure composed of channel steel and i-beam.

3. The tension device of the close door adopts wedge sliding block.

4. The door hinge of the closed door is supported by rolling bearings.

Close door series main features

1. Easy to operate, easy to master for rescue workers, can be filled with gas by high-pressure nitrogen bottle or manually by leather tiger;

2. Light weight, easy to carry;It solves the problem of traditional airtight materials transportation, time consuming and labor consuming.

3. Quick construction speed. Generally, it takes only 5-7 minutes and only 4 minutes to complete temporary closure;

4. Good sealing effect, low air leakage rate, good air tightness of the air bag, and no leakage for more than 24h;

5. It has a wide range of application and can be used in roadways with different cross-section shapes and different supporting forms. It is versatile and can be big or small.

6. Rescue team can carry out practical training in any underground roadway at ordinary times;

9. Airbag airbag airbag can be used repeatedly, which can save a lot of wood.