Hydraulic detection device of safety valve

The utility model discloses a hydraulic detection device for a safety valve, and the device comprises a sealing cavity which is formed by the enclosing of a cavity body and a detachable cavity cover; the sealing ring is arranged between the cavity and the cavity cover; the cavity is in threaded connection with the cavity cover; an annular containing groove used for containing the sealing ring is formed in the upper end edge of the cavity. The cavity and the cavity cover are in threaded connection, the sealing cavity can be sealed by rotating the cavity cover after the cavity cover covers the cavity, the operation is simple, and the disassembly and assembly operation efficiency can be improved; and in the rotary mounting process of the cavity cover, the sealing cavity is subjected to uniformly distributed force in the vertical direction in the circumferential direction, so that the mounting stability and firmness are facilitated. And through the arrangement of the containing groove, the sealing ring is located