Over-speed dynamic capture hydraulic system for rail transportation carts

Abstract

The invention relates to an over-speed dynamic capture hydraulic system for rail transportation carts and belongs to an automatic protection system for over-speed of rail transportation carts. A hydraulic device comprises a signal detection portion, a pressure relief portion, a liquid charging portion, an execution portion and an oil tank. A P2 port of a NO.2 throttling valve of the throttling valve is connected with a K port of a pilot operated check valve of the pressure relief portion. A liquid outlet of a primary filter of the signal detection portion is connected with a P1 port of a NO.5 check valve of the liquid charging portion. A B port of a NO.1 insertion valve and a B port of a NO.2 insertion valve of the pressure relief portion and a P2 port of a NO. 7 check valve of the liquid charging portion are connected with a liquid inlet and a liquid outlet of a brake oil cylinder piston rod cavity of the execution portion. Oil return ports of the signal detection portion, the pressure relief portion, the liquid charging portion and the execution portion are connected with the oil tank. A plurality of brake oil cylinders are arranged on the execution portion. The hydraulic system is high in detection accuracy, capable of achieving rapid braking during over-speed of tramcars, good in brake effect, low in false operation rate, high in safety and reliability, low in worker workload and adaptable to work conditions with various transportation speed requirements.

Description

technical field [0001] The invention relates to an overspeed automatic protection system for rail transport vehicles, in particular to a hydraulic system for dynamically arresting overspeed for rail transport vehicles. Background technique [0002] Rail transportation is the most important and extensive transportation mode in modern coal mines, which can adapt to the change of transportation distance and the bending and undulation of the roadway. At present, there are millions of mine cars running on the coal mine track, and these cars need overspeed protection or rope break protection. [0003] In order to reduce or avoid the hazards of sports car accidents in inclined shafts, in accordance with the requirements of the "Coal Mine Safety Regulations", a sports car protection system is installed on the inclined shaft transportation line, so the problem of anti-sports cars in the inclined lane track transportation of coal mines has always been a safety that is very important i...

AI Technical Summary

Problems solved by technology

Patent 200810243979.X provides a vehicle automatic hydraulic braking system, but the system uses a single circuit, the system reliability is poor, and there is only one capture speed, which is not suitable for rail transport vehicles that require multiple transport speeds. The wheel axle is fixed to the frame, which has poor adaptability to the track and is easy to fall off the track

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