Bottom door opening and closing air control system for railroad hopper car

Abstract

The invention provides a bottom door opening and closing air control system for a railroad hopper car, which comprises a left bottom door, a right bottom door, a left bottom door opening and closing mechanism, a right bottom door opening and closing mechanism, a power system and an air control system, wherein the power system is used for the left bottom door opening and closing mechanism and the right bottom door opening and closing mechanism. The air control system comprises a left air cylinder, a right air cylinder and an air cylinder air control system, the left air cylinder and the right air cylinder in symmetry are as same as the air cylinder air control system, and the air cylinder air control system comprises control valves and air circuits connected with an air source. Each of the left air cylinder and the right air cylinder is a combination air cylinder comprising an internal-discharge air cylinder and an external-discharge air cylinder which are oppositely mounted on the same axis, four two-position three-way air control valves are used for controlling air supply and air exhaust of the internal-discharge air cylinder and the external-discharge air cylinder, four exhaust throttle valves are used for regulating speed of the four two-position three-way air control valves, two three-position five-way air control valves are used for controlling external discharge and internal discharge respectively, and internal-discharge valve and external-discharge valve are implemented through interlocking of two-position three-way air control valves. Clutches are used for switching between manual control and air control, mechanical control valves are arranged at the positions of the clutches, each of the bottom door opening and closing mechanisms and an air control device has an interlocking function, and the openness of the bottom doors can be optionally controlled and can be optionally locked.

Description

technical field [0001] The invention relates to an air control system for opening and closing the bottom door of a railway hopper car, in particular to a device for controlling the opening and closing of the bottom door, belonging to the technical field of railway freight car manufacturing. Background technique [0002] A kind of railway hopper car is provided with a bottom door, a bottom door opening and closing mechanism, and an air control device at present, and the opening and closing of the bottom door is controlled by the bottom door opening and closing mechanism and the air control device to realize the automatic unloading function. Its air control device adopts three cylinders, and the gas in each cylinder must be manually emptied before the next operation can be performed. In addition, the pneumatic control and the opening and closing mechanism of the bottom door do not have an interlock function, and the reducer may be easily damaged if the pneumatic control device...

AI Technical Summary

Problems solved by technology

[0005] a) The existing bottom door opening and closing mechanism and the pneumatic control system cannot be automatically interlocked, that is, the exhaust valve of the cylinder must be opened before the manual operation, and the pressure air in the cylinder must be completely emptied before manual operation can be performed; Before the air control operation, it is necessary to confirm that the clutch has been disengaged before manual air control operation; otherwise, the reducer will be damaged

[0006] b) Pneumatic control principle is relatively complicated and the operation is cumbersome

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