Dumbbell connection component between slots and scraper conveyor and coal plough

The utility model provides a dumbbell connection component between slots which comprises a dumbbell connection component, a fixture block and a spring pin. The dumbbell connection component comprises a left end socket, a right end socket and a rod body. The dumbbell connection component between the slots is characterized in that the outside of the left end socket is provided with a left boss, and the outside of the right end socket is provided with a right boss; a left locating hole is arranged on the left boss, and a right locating hole is arranged on the right boss; the fixture block can match with the left boss and/or the right boss; the spring pin can be inserted into the left locating hole and/or the right locating hole; the dumbbell connection component can be clamped into a locating slot on a ledge to connect the adjacent ledges together; and the fixture block is detachably arranged on the ledge. Further provided is a scraper conveyor including the dumbbell connection component between the slots. Accor