The quick opening hole with the specification of φ150mm is connected with air slide by seal welding. The fit clearance of the dynamic connecting shaft on the top of the quick opening hole is between 0.08~0.12mm. The sealing material of the quick opening hole is EPDM and the sealing tightness can be adjusted according to the site condition so as to have the best sealing effect. The maximum opening and closing force of the quick opening hole is not more than 300N and the minimum force is not less than 120N. The quick opening hole can bear the positive pressure of 0.2Mpa and the negative pressure of 0.25Mpa.