Fecha de publicación: 12/07/2022 Fuente: Wipo Olive Table The split type oil tank isolating valve comprises a valve shell, a pipe cavity is divided into an upper pipe cavity and a lower pipe cavity through an inner ring table, and the upper pipe cavity and the lower pipe cavity are communicated through a first vent hole and a second vent hole in the middle of the inner ring table; the upper valve head assembly is movably arranged in the upper pipe cavity; the lower valve head assembly is movably arranged in the lower pipe cavity; the electromagnetic coil assembly is used for controlling the upper valve head assembly to be close to or away from the inner ring table; the bottom cover is installed at the bottom of the valve shell and provided with a carbon tank pipeline connector communicated with the lower pipe cavity, a flow limiting structure is machined on the inner wall of the bottom cover and comprises an upper air groove and a lower air groove which are formed in the inner wall of the bottom cover, and the gap between the upper air groove and the lower valve head assembly is larger than that between the lower air groove and the lower valve head assembly. By means of the oil tank isolation valve, the problem that in the initial pressure relief process of an existing oil tank isolation valve, the flow is too large, and consequently the valve is closed is solved.