Extension connecting device for discharging materials by pushing and pulling quantitative warehouse gate plate

The utility model discloses an extension connecting device for discharging materials by pushing and pulling a quantitative warehouse gate plate. The extension connecting device is provided for overcoming the defects that in the prior art, an inner quantitative warehouse gate plate is directly connected with a piston rod of a hydraulic cylinder, the piston rod in a quantitative warehouse is prone to being scratched by ore, a cylinder body and an oil seal are abraded, maintenance expenses are increased, and the normal production is influenced. A frame type support is fixed to the outer vertical wall of the quantitative warehouse. One end of the support is opposite to the discharging gate plate in the quantitative warehouse, and a hydraulic cylinder is fixed to the other end of the support. A piston rod of the hydraulic cylinder is opposite to the gate plate. One end of a connecting rod is concentrically and fixedly connected with one end of the piston rod, and the other end of the connecting rod is fixedly connected with the gate plate. The hydraulic cylinder is fixed to the extension support, the connecting rod replaces the piston rod to enter the quantitative warehouse, and therefore a hydraulic system can not be damaged during work, the maintenance time of the hydraulic system and the loss of oil product accessories are greatly saved, the maintenance cycle is doubled, the normal production is ensured, and the production cost is reduced.