Hydraulic quick discharge valve for monorail crane braking oil cylinder

Abstract

The invention provides a hydraulic quick discharge valve for a monorail crane braking oil cylinder. The hydraulic quick discharge valve comprises an upper valve seat, a lower valve seat, a one-way throttle valve and a splicing valve, wherein the upper valve seat is provided with an oil inlet, a working port, a first flow channel, a third flow channel communicating with the first flow channel, and a second flow channel communicating with the working port and the one-way throttle valve; the lower valve seat is provided with a quick discharge port, a first flow channel, a second flow channel communicating with the first flow channel, and the splicing valve; the oil inlet and the first flow channel of the upper valve seat, the one-way throttle valve, and the second flow channel and the working port of the upper valve seat construct an oil inlet channel together; the working port and the second flow channel of the upper valve seat, the first flow channel and the second flow channel of the lower valve seat, a valve bush and a valve core of the splicing valve, and the quick discharge port of the lower valve seat construct a pressure oil quick discharge channel. The hydraulic quick discharge valve is simple in structure, and is small in size; during use, pressure oil in the monorail crane braking oil cylinder can be rapidly discharged into an oil tank, thereby meeting the emergency rapid braking demand of a monorail crane.

Description

technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a hydraulic quick-discharge valve for monorail crane brake cylinders. Background technique [0002] Such as the monorail crane brake device disclosed in the Chinese patent document CN 203111199U with the authorized announcement number, and the monorail crane brake device similar to it, are indispensable components in the coal mine monorail crane. One of the important components of the brake device of the monorail crane is the brake cylinder. The working mode of the brake cylinder is spring brake and hydraulic release. One end is connected with a brake pressure block, there is a fixed fulcrum in the middle of the brake lever, and there is a brake spring on the periphery of the brake cylinder, relying on the pre-compression force of the brake spring to push the brake pressure block at the other end of the brake lever to press the guide rail to Realize braking; when the br...

AI Technical Summary

Problems solved by technology

One of the important components of the brake device of the monorail crane is the brake cylinder. The working mode of the brake cylinder is spring brake and hydraulic release. One end is connected with a brake pressure block, there is a fixed fulcrum in the middle of the brake lever, and there is a brake spring on the periphery of the brake cylinder, relying on the pre-compression force of the brake spring to push the brake pressure block at the other end of the brake lever to press the guide rail to Realize braking; when the brake is released, the pressure oil enters the rod chamber of each brake cylinder through the brake valve, hydraulic pipeline, joint, etc., and acts on the cylinder piston to overcome the spring force, so that the spring is compressed to release the brake ;During the braking operation, the hydraulic oil in the rod cavity of the brake cylinder needs to be returned to the oil tank of the monorail crane by the hydraulic pipeline, brake valve, etc. The length of the oil pipe is longer, so that the time for the pressure oil in the brake cylinder to flow back to the oil tank through the longer oil pipe is longer, resulting in braking delay in the monorail crane

However, monorail cranes sometimes need to implement emergency and rapid braking in emergency situations. The braking delay phenomenon in the prior art makes it impossible for monorail cranes to quickly brake monorail cranes when emergency braking is required, thereby causing safety accidents. Hidden danger

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