Positioning tool for watertight measurement of low-pressure casting part

The invention discloses a positioning tool for watertight measurement of a low-pressure casting part, and belongs to the field of watertight measurement positioning tools. A bottom plate; the sealing plate is fixedly connected with the bottom plate; the guide plate is fixedly connected with the sealing plate; the first rotating shaft is rotationally connected with the sealing plate; the first gear fixedly sleeves the first rotating shaft; the first rack is connected with the guide plate; the first fixing plate is connected with the first rack; the second rack is connected with the guide plate; the second fixing plate is connected with the second rack; the second gear fixedly sleeves the first rotating shaft; the third rack is connected with the bottom plate; the fourth rack is connected with the bottom plate; the first connecting rod is fixedly connected with the third rack; the second connecting rod is fixedly connected with the fourth rack; the first clamping plate is fixedly connected with the first connec