Airtight door Main Structure

1 The airtightdoor is made up of the flat steel plate,stiffened plates,ring beam and othercombinations.
2 door is channel steel, I-beam composite frame
3 tensioning device is a wedge-shaped wedge slide
Airtight door is used for underground drainage pump room to the bottom of themain substation and the main channel, easy to close, in order to prevent thewater suddenly immersed.

Airtight door Parameters

 Theairtight door maximum pressure is 98KPa,Based on cave mouth size, can bedivided into four specifications
Model Example:  

   Number     Model,Specification       Drawing No.
           1         MMB1.4*1.8         B85-373(1)
           2          MMB1.6*1.8         B85-373(2)
           3         MMB1.8*2.0        B85-373(3)
           4          MMB2.1*2.0         B85-373(4)   

Airtight door Model Meaning

MMB(Airtight door) 
1.4(through the cave mouth net width1400mm) 
1.8(through the cave mouth net height1800mm)