Railway freight car parking brake control valve

Abstract

The invention discloses a parking brake control valve for a railway wagon. The parking brake control valve for a railway wagon comprises an inflation-exhaust part and a double-pneumatic control reversing part, and is also provided with an air intake interface, an energy storage brake interface and a train brake cylinder interface. In a working state, the air intake interface of the parking brake control valve is connected with a train main air pipe through a filter and a cut-off valve, the energy storage brake interface is connected with an inflation-exhaust flange joint of an energy storage type parking brake, and the train brake cylinder interface is connected with an air inlet and outlet flange joint of a train brake cylinder through a ball valve. The parking brake control valve for the railway wagon has the advantages that the structure is simple and compact, the action is stable and reliable, the required air volume for a train is small, the train brake cylinder and the energy storage type parking brake are enabled to act collaboratively, the parking brake can be automatically released and used on the conditions that the normal parking, braking and mitigation functions of the train are not affected, meanwhile, the parking brake force of the whole train is enabled to be uniform and consistent, the time on parking brake is greatly reduced, the situation that the parking brake is not mitigated can be easily found by an operator, and the scratch on a tread face of the wagon due to misoperation can be avoided.

Description

technical field [0001] The invention relates to a parking brake technology for railway freight cars, in particular to a parking brake control valve for railway freight cars. Background technique [0002] During the transportation of railway freight cars, when the vehicles stop normally or need to be parked on the track, freight yard or maintenance workshop due to failure or derailment, in order to ensure the safety of the staff, parking brakes must be implemented on a certain number of vehicles. Parking brake is an auxiliary backup braking technology for railway freight cars, which is used to keep the vehicle maintaining the braking force after the air braking force is eliminated, so as to prevent the vehicle from moving on the track and causing safety accidents. [0003] The traditional parking brake method of railway freight cars is mainly realized by the hand brake device, which applies the braking force to the wheel tread of the railway freight car by turning the hand wh...

AI Technical Summary

Problems solved by technology

However, it also has major defects: first, the braking force of the train depends on the strength of the operator, which is difficult to control due to human factors, resulting in inconsistent braking force of the entire train; second, it is highly dependent on the operator, There is a situation where the operator forgets to apply the brakes to relieve or misuse the vehicle before the vehicle is running, resulting in no disengagement or insufficient disengagement between the wheel tiles, causing safety hazards such as vehicle tread abrasions; third, for the entire train of vehicles, it is necessary to Carrying out the manual operation of braking to stop or braking release one by one is time-consuming and laborious, and the work efficiency is very low

[0006] Because the integrated parking brake device has the following deficiencies: first, the principle structure is complicated, and the product manufacturing requirements are very high; second, when the locking mechanism fails, it will affect the wind braking system of the train and increase the unsafety of driving. The third is to combine the development of train brake cylinders, which is very difficult

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