Operating valve for opening and closing bottom door of stone ballast hopper wagon

Abstract

The invention discloses an operating valve for opening and closing a bottom door of a stone ballast hopper wagon. The operating valve comprises a valve seat and a valve body, wherein an air inlet channel and five air channels are formed in the valve seat; one ends of the five air channels form air channel holes distributed in a pentagonal mode in the top of the valve seat; the five air channel holes are sequentially communicated with a small door two-way cylinder exhaust air channel, a small door leading two-way cylinder rear cover passage, a large door leading two-way cylinder rear cover passage, a large door leading two-way cylinder front cover passage, a small door leading two-way cylinder front cover passage in the clockwise direction; the valve body is arranged on the valve seat, and connected with the valve seat to form a valve chamber; and the side wall of the valve body is provided with a large door two-way cylinder exhaust outlet communicated with the valve chamber and the outside. The operating valve can independently control two two-way air cylinders, is provided with six valve positions satisfying a manual position, a small door opening position, a large door opening position, a pressure maintaining position, a large door closing position and a small door closing position, is provided with an anti- maloperation structure, and is reasonable in sealing scheme and convenient to produce and overhaul.

Description

technical field [0001] The invention belongs to the technical field of railway freight car control systems, and more specifically relates to a control valve for opening and closing the bottom door of a ballast hopper. Background technique [0002] The existing ballast hopper car adopts the anti-pinching bottom door, that is, the bottom door is designed as two sets of transmission mechanisms, one is the opening and closing transmission mechanism of the large door, and the other is the opening and closing transmission mechanism of the small door. The sequence from opening to closing the door It is: Manual—Small door open—Gate open—Pressure holding position—Gate close—Small door close—Manual, one control valve can only control one set of transmission mechanisms, and the two sets of transmission mechanisms can be independently controlled by the control valve to achieve anti-pinch ballast The opening and closing of the bottom door is very prone to misoperation and low efficiency....

Images