Middle cavity inner swing type quick opening and closing gate valve

The utility model relates to the technical field of gate valves, and discloses a middle cavity inner swing type fast opening and closing gate valve which comprises a valve body, the two ends of the valve body are communicated with a first pipeline and a second pipeline respectively, a gate plate is arranged in the valve body, a sliding assembly is arranged in the valve body, and the sliding assembly comprises a handle. The surface of the handle is provided with anti-skid lines. The valve rod and the hand wheel are replaced by the gear and the rack, the top space of the valve body is reduced, the whole valve body becomes small, the valve body can be installed at the position with the small moving space more conveniently, the gear is driven to rotate by rotating the handle, and therefore the rack meshed with the gear is driven to slide upwards on the inner wall of the sliding block. The rack is driven to move upwards to drive the flashboard fixedly connected with the rack to move upwards, so that the communicat