Carbide reamers has more than one cutting flutes, usually have the 6 cutting flutes, Used for reaming or trimming, it has straight flutes and spiral flutes, Belonging to one of finishing tools.
Reaming is a cutting method that is easy to operate, high productivity, and can obtain high-quality holes, so it is widely used in production.
Reamer Solid Carbide,Reamer Machining,Solid Carbide Drills,Solid Carbide Cutters ROYI CNC TOOL TAIXING CITY CO.,LTD , https://www.royitools.com
Fire dampers and other projects in the existence of some problems
During the course of the construction audit, it was found that some engineering drawings on the control room to send and return duct in its wall without fire damper, which is inconsistent with the "fire alarm system design specification" GB50116-98 in 6.2.2. The purpose of fortification fire valve is to ensure the fire control room fire safety. Fire control equipment fire control, smoke exhaust valve and other facilities control functions imperfect According to the specification GB50116-98 in the provisions of Article 6.3.9: After the fire alarm confirmation, you must stop the relevant parts of the air-conditioning air supply, turn off the electric fire damper, and Receive its feedback signal; At the same time start the relevant parts of smoke and exhaust fan, exhaust valve, etc., and receive its feedback signal. Some engineering linkage control can not be partitioned control exhaust valve, exhaust port, and some can not receive the feedback signal, can not reflect the valve opening and closing conditions. Pipe network gas fire extinguishing system without pneumatic fire damper GB50116-98 in the first 6.3.4.3 requirements: "in the delay phase, should be automatically closed fire doors, windows, ventilation and air conditioning system to stop the relevant parts of the fire damper." This requires that the tube Network gas fire extinguishing system, pneumatic damper must be installed, and fire control equipment linkage. In individual projects do not have this feature. Supply air and exhaust air duct when the closing valve without remote control Some buildings basement, the use of air supply and exhaust of parking air duct, we found that the blower and exhaust valve in front of the globe valve can only be manual, can not achieve control Room remote control, usually, blower work, the front of the globe valve is open, in case of fire, the need to go to the scene to close the fan before the stop valve, it is not practical, a direct impact on the exhaust system. Therefore, it is recommended to increase the remote control valve function.