US 12,234,711 B2
Hard pipe connecting device and manifold system thereof
Quan Luo, Guanghan (CN); Ru Miao, Guanghan (CN); Maolin Zhu, Guanghan (CN); Meiying Xie, Guanghan (CN); and Jiaping Yang, Guanghan (CN)
Assigned to Sichuan Honghua Petroleum Equipment Co., Ltd., Sichuan (CN)
Filed by Sichuan Honghua Petroleum Equipment Co., Ltd., Guanghan (CN)
Filed on Sep. 1, 2022, as Appl. No. 17/929,094.
Claims priority of application No. 202111064542.1 (CN), filed on Sep. 10, 2021; and application No. 202122201553.1 (CN), filed on Sep. 10, 2021.
Prior Publication US 2023/0082967 A1, Mar. 16, 2023
Int. Cl. F16L 23/12 (2006.01); E21B 33/068 (2006.01); E21B 43/26 (2006.01); F16L 23/18 (2006.01)
CPC E21B 43/2607 (2020.05) [E21B 33/068 (2013.01); F16L 23/12 (2013.01); F16L 23/18 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hard pipe connecting device, comprising at least one non-concentric connecting pipe joint (1), at least one universal connecting pipe joint (2), and a rotary seal (3), wherein:
the non-concentric connecting pipe joint (1) comprises a pipe body (11) and two first flanges (12) at opposite ends of the pipe body (11), the two first flanges (12) are parallel to each other, and the two first flanges (12) have respective axes with a distance difference h>0;
the universal connecting pipe joint (2) comprises a pipe joint main body (21) and second flanges (22) at respective first and second ends of the pipe joint main body (21), the second flanges (22) have respective end surfaces with planes that form an included angle M<90°, and the non-concentric connecting pipe joint (1) and the universal connecting pipe joint (2) form a butt joint or a pipeline; and
the rotary seal (3) is between one of the first flanges (12) and the pipe body (11) and/or between one of the second flanges (22) and the pipe joint main body (21), the rotary seal (3) comprises a supplementary core (31) and a plurality of steel balls (32); the supplementary core (31) has a bearing end surface with a rear side; the steel balls (32) are at the rear side of the bearing end surface of the supplementary core (31); the pipe body (11) and/or the pipe joint main body (21) are configured with mounting grooves (4) matching the steel balls (32); the supplementary core (31) comprises bending sections (311); the pipe body (11) and/or the pipe joint main body (21) are configured with notches (5) matching the bending sections (311), and the bending sections (311) extend into the notches (5).