Device for preventing oil pipe from ejection during blowout

The utility model relates to a device for preventing an oil pipe from ejection during blowout. The device is characterized in that swing arms are arranged on the two sides of a body; the swing arms are connected with lower links; a valve is arranged on the body; sliding slopes are arranged on the inner walls of the body and the valve; sliding tooth sheets are arranged in the sliding slopes; and a jamming handle is arranged on the outer surface of the valve. The device has the following advantages and effects that: during blowout, when the oil pipe rises, the device can quickly control the rising oil pipe and ensure the constructors at the mouth of the well to smoothly install the plug valve, meanwhile, when being used for sealing the mouth of the well after normal construction, the plug valve can play a role in preventing ejection; and the device is light in weight, has high pipe blocking speed and a wide application range and is convenient to operate.