The improved filter bag structure adopts a spring structure, omits the connecting flange, and fixes the spring structure directly into the venturi. The top end of the filter bag is firmly tied with a rope and pressed on the spring frame, and the bottom end is tightened with the bottom plate of the spring frame so that the filter bag forms a closed system. Taking into account the limited extensibility of the filter bag, a small spring is added at the bottom, which is fixed to the steel Angle welded to the simplified dust collector, and the spring frame is suspended by the elastic extension hook of the small spring to tighten the filter bag.
The improved filter bag structure has obvious advantages in installation, transport, and use:
Because the connecting flange is omitted and materials are reduced, the cost of the spring frame is only 1/4 of the original, which greatly reduces the cost of equipment.
Because the spring frame is small when compressed, it is easy to pack and not easy to deform. When installing, just tighten the fabric bag and hook it with the small spring. Therefore, it is convenient to install and carry, and it is easy to maintain and replace the filter bag.
The weight of the spring frame is less than 1/5 of the original frame weight, which guarantees the bearing capacity of the board.
The spring frame also significantly improves the dust removal effect of the filter bag. This is because the spring frame can produce an automatic vibration after the impact of the air intake and reverse blowing at high pressure. This self-vibration effect has a good offset effect on the removal of dust from the filter bag. The pulse of the solenoid valve is in the 0.5 s range. Such a short blowing time can only guarantee that the dust from the filter bag leaks, but it cannot guarantee that the dust settles to the end, so it will inevitably produce a dust return treatment and increase the dust filter pressure from the filter bag. The self-vibrating effect of the spring frame in the interval between the second cleaning of the filter bag solves this problem greatly, reduces the amount of dust treatment of the second filter bag, and improves the efficiency of the equipment.
But it should be noted that the fixing of the spring frame on the venturi tube must be reliable; The spring pass must be controlled between 30 and 50 mm after installation to ensure the filter area and dust filtering effect of the filter bag.