Air inlet unloading device suitable for sliding vane air compressor

The air inlet unloading device comprises a valve body, an adjusting threaded rod, an ejector block, a first spring, a valve rod, an air inlet and an unloading port, the adjusting threaded rod is in threaded insertion connection with the top of an inner cavity of the valve body, the ejector block is installed at the bottom of the adjusting threaded rod, the first spring is installed at the bottom of the ejector block, and the first spring is installed at the bottom of the valve rod. A valve rod is installed at the bottom of the first spring, and an air inlet is fixedly formed in one side of the bottom of an inner cavity of the valve body. The reset mechanism is arranged so that the reset effect can be improved, the occurrence rate of reset faults can be reduced, reset overhaul can be conducted without disassembling the valve body when the unloading valve has the reset faults, operation is easy and convenient, whether the limiting sliding block is reset or not during reset can be simply and clearly checked thro