Product overview of protective airtight doors for refuge chambers
The protective airtight door of the refuge chamber opens flexibly, quickly and reliably, with double sealing of water and air, high strength, can effectively prevent tangible and invisible losses, is easy to install, can withstand the shock wave of 1.0MPa, and can effectively isolate toxic and harmful gases, and has an emergency door and observation window. The service life can reach more than 10 years.

Product features of the protective airtight door of the refuge chamber
1. The door body has sufficient strength, and the pressure bearing capacity is up to 1.0MPa, which can effectively prevent the impact stress wave generated when the underground explosion occurs.

2. Effective water and air sealing, there are double-layer seals with different functions between the door and the door frame to ensure that there is no water and gas leakage.

3. Provide explosion-proof, sealed multi-channel power cables, compressed gas, water supply and communication nodes that can be installed in a conspicuous position on the door.

4. The appearance is smooth and beautiful, and the flat sealing surface is treated with special anti-rust.

5. Easy to enter and exit, can be operated inside and outside at the same time, manual quick opening and fast closing mechanism is convenient for personnel to enter quickly, multiple times and achieve the effect of initial sealing.

6. Observation window and emergency exit, the observation window can observe the internal situation of the chamber at any time, and the small door of the emergency passage can enter and exit when the door is accidentally blocked.

7. Easy to install, no need to assemble and assemble in the underground; The sealing plane of the door frame has a special protective plate so that it will not be scratched or scratched during manufacturing, transportation, and installation (concrete pouring).

The main technical indicators of the protective airtight door of the refuge chamber
1. Anti-shock wave strength: The anti-shock wave strength of the protective airtight door > 0.3 megapascals.

2. Net size: 800×1600 (width × height) 900x1800 (width × height) It can be manufactured according to user requirements

3. Air tightness: under the pressure of 500±20 Pa, the pressure relief rate is less than 350±20 Pa|hour.

Product structure of refuge chamber protective airtight door
1. Each set of protective airtight doors is composed of two doors that open outward.

2. The first is a protective airtight door, and the door leaf adopts an arc-shaped structure, and the reinforcing rib plate is welded inside. The inner layer of the door leaf is a stainless steel plate surface, and there is an asbestos insulation layer in the middle.

3. The second door is a closed door, and the panels on both sides of the closed door are made of stainless steel, and the reinforcing ribs are welded inside.

4. The sealing groove around the protective airtight door and the door frame of the airtight door is inlaid with fireproof sealing strips, and the door leaf is surrounded by a sealing sub-opening.

5. There are rotating handwheels and locking devices inside and outside the protective airtight door and airtight door.

6. Hinges are installed up and down on one side of the protective airtight door and airtight door to connect the door leaf with the door frame.

7. The protective airtight door and airtight door have an observation window, which is composed of highly tempered glass, which can resist the shock wave of more than 0.3 megapascals.

Contact: Manager Fan

Mobile phone number: 18660761529

QQ：2710561246

Address: No. 11, Kaiyuan Road North, High-tech Zone, Jining City, Shandong Province