HAND PRESSURE VALVE

摘要

Disclosed is a hand pressure valve, comprising a valve body (1), a bush (2), a valve rod (3) and an elastic resetting piece (4). The valve body (1) has a valve body inner cavity. The bush (2) is of a cylinder-shaped structure and is arranged in the valve body inner cavity. The lower part of the valve rod (3) is arranged in a bush inner cavity (21), and the upper part of the valve rod (3) is arranged at the outside of the valve body (1). Air inlet holes and air outlet holes in communication with the bush inner cavity (21) are provided on the valve body (1) and the bush (2). A valve core (31) matched to the bush inner cavity is provided on the valve rod (3). The elastic resetting piece (4) is arranged at the lower end of the valve rod (3), and when the elastic resetting piece (4) is in a natural state, the valve core (31) is separated from and arranged between the air inlet holes and air outlet holes, and when the elastic resetting piece (4) is in a compressed state, the air inlet holes are in communication with the air outlet holes through the inner cavity. The hand pressure valve has a simple structure and no electrical structure, thereby having few potential failure points. A whistle can be controlled and operated manually, and the traffic safety of railway locomotives is ensured.