Interior runner coupling

The utility model discloses an interior runner coupling, including the coupling body, the coupling body includes interior sleeve pipe and outer tube, be provided with the through -hole on the outer tube, be provided with the fixed slot with through -hole matched with on the interior sleeve pipe, be provided with the mounting of wearing to establish through -hole and fixed slot in proper order on the coupling body, outer tube edge self length direction extends there is the spiral pitch groove. Aim at through -hole and fixed slot, be provided with the hole with mounting matched with simultaneously on the sucker rod, insert the hole on through -hole, fixed slot and the sucker rod with the mounting after, not only realized interior sleeve pipe and outer tube being connected between the two, realize external sheathed tube promptly and change, saved the material, realized fixing of interior sleeve pipe, outer tube and sucker rod three equally. 本实用新型公开了种内流道接箍,包括接箍本体，所述接箍本体包括内套管和外套管，所述外套管上设置有通孔，所述内套管上设置有与通孔相配合的固定槽，所述