Dual-pipeline hydraulic safety valve

The invention discloses a dual-pipeline hydraulic safety valve comprising a valve body, a left valve core component, a right valve core component and a piston. The valve body is provided with a pressure fluid inlet, a left pressure fluid outlet, a right pressure fluid outlet and a through passage, and the left and right pressure fluid outlets are connected to two ends of the through passage and communicated with the pressure fluid inlet through the through passage. The left and right valve core components are both mounted in the through passage so as to turn on or off communication between the left and right pressure fluid outlets and the pressure fluid inlet. The piston is disposed between the left valve core component and the right valve core component, a left valve core passage and a right valve core passage are formed in the left valve core component and the right valve core component respectively, one ends of the two passages are communicated with the left pressure fluid outlet and the right pressure fluid outlet respectively, and the other ends of the two passages are both communicated with the piston. By the aid of the dual-pipeline hydraulic safety valve, when a single oil source supplies oil to dual pipelines, after pressure is lowered to a set value due to fault of one pipeline, oil supply to the faulted pipeline is stopped automatically, and the other pipeline is still kept in a normal working state.