Automatic feeding and discharging device for anchor bolt tensioning experiment

The utility model provides an automatic feeding and discharging device for an anchor bolt tension experiment. The automatic feeding and discharging device comprises a sample storage plate, a sample pressing plate, a sample pressing air cylinder, a material returning plate, a sample returning channel selection plate, a qualified product storage layer, an unqualified product storage layer, a samplereturning channel selection air cylinder, a sample discharging plate and a sample discharging air cylinder. The sample storage plate is provided with a downward slope surface; the sample pressing plate is arranged above the sample storage plate, one end of the sample pressing plate is hinged to the rack, the other end of the sample pressing plate is bent downwards, and the sample pressing plate isconnected with a telescopic rod of the sample pressing air cylinder above the sample pressing plate; the lower sample plate is connected with a telescopic rod of the lower sample cylinder, and when the telescopic rod of the l