Manual empty and load adjusting device provided with pressure limiting valve

Abstract

The invention discloses a manual empty and load adjusting device provided with a pressure limiting valve, which comprises the pressure limiting valve, an empty and load change-over cock, a pressure reduction air cylinder and a brake pipeline, wherein the empty and load change-over cock is provided with an empty position, a load position and an exhaust hole; an upstream pressure input port of the pressure limiting valve is connected with an air brake of a vehicle, and a downstream pressure output port is connected with a brake cylinder; a branch is arranged on a connecting passage of the downstream pressure output port and the brake cylinder, the brake cylinder is connected with a pressure reduction air cylinder through the branch, and the empty and load change-over cock is connected to thepassage between the brake cylinder and the pressure reduction air cylinder in series; another branch is arranged at the end, which is away from the brake cylinder, of the empty and load change-over cock on the connecting passage of the brake cylinder and the pressure reduction air cylinder, and the pressure reduction air cylinder, the brake cylinder and an empty pressure signal access port in thepressure limiting valve are connected; and an empty and load position pressure display is arranged on a valve cover of the pressure limiting valve. By the adoption of the device, the pressure of thebrake cylinder when the vehicle is empty or loaded can be adjusted, especially the pressure value of the brake cylinder at the empty position can be accurately controlled, and brake over-sticking is reduced.

Description

Technical field: [0001] The invention relates to the technical field of railway wagons, in particular to the technical field of an empty-load wagon adjusting device for a railway wagon braking system, in particular to a manual empty-load wagon adjusting device equipped with a pressure limiting valve. Background technique: [0002] There are two main types of adjustment devices for empty and heavy vehicles on railway freight cars in my country: manual adjustment and automatic adjustment. The existing manual adjustment devices for empty and heavy trucks are generally two-level adjustments, including empty and heavy truck switching plugs, empty truck safety valves, pressure-reducing air cylinders, and connecting pipelines. The on-site operators judge the vehicle’s empty weight status. When the vehicle is in the heavy parking space, place the empty-to-heavy vehicle conversion plug in the heavy parking space. When it is in an empty parking space, put the empty-load vehicle conve...

AI Technical Summary

Problems solved by technology

The pressure of the empty brake cylinder of the existing manual empty-load vehicle adjustment device is 190KPa. For vehicles that require a pressure less than 190KPa, this device has limitations.

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