US 12,285,784 B2
Trenchless multi-stage pipe cleaning device and method combining artificial tornado and dagger-like mechanical sand
Jiwei Wen, Shijiazhuang (CN); Pengshuai Zhang, Shijiazhuang (CN); Wenjiang Li, Shijiazhuang (CN); Xianmin Han, Shijiazhuang (CN); Zhichun Liu, Shijiazhuang (CN); Xingliang Sun, Shijiazhuang (CN); Pengcheng Wang, Shijiazhuang (CN); Weige Han, Shijiazhuang (CN); and Lin Gao, Shijiazhuang (CN)
Assigned to SHIJIAZHUANG TIEDAO UNIVERSITY, Shijiazhuang (CN)
Appl. No. 18/267,104
Filed by SHIJIAZHUANG TIEDAO UNIVERSITY, Shijiazhuang (CN)
PCT Filed May 24, 2023, PCT No. PCT/CN2023/096000
§ 371(c)(1), (2) Date Aug. 1, 2024,
PCT Pub. No. WO2023/241325, PCT Pub. Date Dec. 21, 2023.
Claims priority of application No. 202210679071.3 (CN), filed on Jun. 15, 2022.
Prior Publication US 2025/0108413 A1, Apr. 3, 2025
Int. Cl. B08B 9/027 (2006.01); B08B 9/032 (2006.01); B08B 9/035 (2006.01); B24C 1/08 (2006.01); B24C 3/32 (2006.01)
CPC B08B 9/027 (2013.01) [B08B 9/0328 (2013.01); B08B 9/035 (2013.01); B24C 1/086 (2013.01); B24C 3/325 (2013.01); B08B 2209/032 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A trenchless multi-stage pipe cleaning device combining an artificial tornado and dagger-like mechanical sand, comprising a front-end pipe cleaning device, wherein the front-end pipe cleaning device comprises a primary pipe cleaning device and a secondary pipe cleaning device;
the primary pipe cleaning device comprises a primary right-end flange, a primary pipe cleaning device body and a primary left-end flange that are connected in sequence; multiple primary air inlet joint pipes are evenly distributed on an outer wall of the primary pipe cleaning device in a circumferential direction; and an axis of each of the primary air inlet joint pipes is diagonally intersecting with an axis of an inner chamber of the primary pipe cleaning device body in a same plane;
the secondary pipe cleaning device comprises a secondary right-end flange, a secondary pipe cleaning device body and a secondary left-end flange that are connected in sequence; multiple secondary air inlet joint pipes are evenly distributed on an outer wall of the secondary pipe cleaning device in the circumferential direction; and an axis of each of the secondary air inlet joint pipes is diagonally tangent to a wall surface of an inner chamber of the secondary pipe cleaning device body;
the primary left-end flange is connected to the secondary right-end flange, such that the primary pipe cleaning device is hermetically connected to the secondary pipe cleaning device;
the primary air inlet joint pipes and the secondary air inlet joint pipes are hermetically connected to air outlet joints of a multi-channel directional valve, respectively; the multi-channel directional valve further comprises an air inlet joint and a hollow multi-channel directional valve body; the air inlet joint is connected to an air compressor; each of the air outlet joints is connected to a nozzle provided with an internal flow channel having a necked-down section; and each of the air outlet joints is provided with a shut-off valve for adjusting start, stop, and a flow rate of a compressed air flow; and
the primary right-end flange of the primary pipe cleaning device is securely connected to an inlet flange of a feed pipe, and the feed pipe is connected to a discharge hole of a vibrating screen.