Artificial tornado-rifo combined type trenchless multi-stage pigging device and pigging method thereof

• Main Authors: WEN JIWEI, HAN XIANMIN, ZHU ZHENGGUO, LI XINZHI, SUN MINGLEI, LI WENJIANG, FAN HAOBO, XIANG TIAN, GUO XIAOLONG
• Format: Patent
• Language: Chinese; English
• Published: 16.09.2022
• Subjects: CLEANING; CLEANING IN GENERAL; OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL,e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL; PERFORMING OPERATIONS; PREVENTION OF FOULING IN GENERAL; SEPARATING SOLIDS FROM SOLIDS; SEPERATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, ORSIFTING OR BY USING GAS CURRENTS; SORTING; TRANSPORTING

The invention provides an artificial tornado-rifo combined type trenchless multi-stage pigging device and a pigging method thereof. The artificial tornado-rifo combined type trenchless multi-stage pigging device comprises a first-stage pigging device and a second-stage pigging device which are connected, a plurality of air inlet connector pipes are evenly distributed on the outer wall face of the pipe cleaning device in the circumferential direction. The air inlet joint pipe is connected with an air compressor; each air outlet joint is connected with a nozzle; the primary pigging device is connected with the vibrating screen; and a blowdown device is arranged at the rear end. Compressed air is conveyed into an inner cavity of the pipe cleaning device; gravel particles are wrapped to form a first-stage gas-solid mixed flow, and the first-stage gas-solid mixed flow is brought into a second-stage pipe cleaning device; a plurality of strands of high-speed airflow which is obliquely and tangentially injected into