1000L/min safety valve for hydraulic support

The utility model provides a 1000L/min safety valve for a hydraulic support. The 1000L/min safety valve comprises a joint body and a valve shell, wherein two lines of drain holes are formed in the joint body, four lines of unloading holes are formed in a valve core, the joint body is put in the valve core and is then nested in a screw sleeve, special seal rings are respectively arranged in the screw sleeve and the joint body, a spring seat and a pressure regulating screw are arranged in the valve shell, the two ends of the spring respectively prop against the spring seat and the pressure regulating screw, the joint body is fixed together with the valve shell through threads, and the valve core is contacted with the spring seat. The safety valve adopts a quick joint, is convenient to install, and has the advantages of reliable performance, large flow, simple structure and quick and flexible response. The 1000L/min safety valve enables the operation cylinder of the hydraulic support to quickly drain when the ex