This utility model discloses a filter end cap fixing device, including a filter cylinder. The filter cylinder is connected to an end cap via a connecting
flange. An upper protective cap and a lower protective cap are engaged with the surface of the connecting
flange. An
insertion mechanism is fixedly connected to the end of the upper protective cap, and a connecting mechanism is fixedly connected to the end of the lower protective cap. A
drying mechanism is installed inside both the upper and lower protective caps. This utility model, by engaging the upper and lower protective caps on the upper and lower sides of the connecting
flange, can seal and protect the bolts inserted into the connecting flange and the connecting flange itself. Simultaneously, the first connecting frame drives the
insertion post to insert into the second connecting frame, facilitating the limiting connection between the upper and lower protective caps. The
abutment between the first and second rubber sleeves increases the stability of the
insertion between the insertion post and the second connecting frame.