US 11,873,924 B2
Thick-wall compression fitting
Ye Jianhua, Tianjin (CN); and Zhou Qingnian, Tianjin (CN)
Assigned to Guolin (Tianjin) Technology Co., Ltd., Tianjin (CN); and Shanghai Zep International Trade Co., Ltd., Shanghai (CN)
Filed by Guolin (Tianjin) Technology Co., Ltd., Tianjin (CN); and Shanghai Zep International Trade Co., Ltd., Shanghai (CN)
Filed on Sep. 9, 2021, as Appl. No. 17/470,715.
Prior Publication US 2022/0120364 A1, Apr. 21, 2022
Int. Cl. F16L 37/091 (2006.01); F16L 21/06 (2006.01); F16L 21/00 (2006.01); F16L 21/08 (2006.01)
CPC F16L 21/06 (2013.01) [F16L 21/005 (2013.01); F16L 21/08 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A thick-wall compression pipe fitting, comprising:
a thick-wall fitting body arranged between two thick-wall steel pipe bodies for connecting the thick-wall steel pipe bodies; and
a sealing ring, a positioning retainer and a teeth ring installed between the thick-wall fitting body and the thick-wall steel pipe body, wherein
said thick-wall fitting body includes a middle connecting section and a first flared section and a second flared section extending to both sides;
said connecting section, the first flared section and the second flared section are integrally formed, and a first limiting step is arranged between the connecting section and the first flared section and a second limiting step is arranged between the first flared section and the second flared section;
the thick-wall steel pipe body extends into the inner side of the first flared section, and the end of the thick-wall steel pipe body is located at the first limiting step;
the sealing ring, the positioning retainer and the teeth ring are installed in the second flared section in sequence, wherein the sealing ring is located at the second limiting step, the thick-wall steel pipe body and the thick-wall fitting body are sealed and connected with the sealing ring, the positioning retaining ring and the teeth ring;
the teeth ring is a “C” shaped snap ring having an elastic force of radial contraction; and
a side wall of the teeth ring is provided with positioning teeth projecting inward, and the positioning teeth are integrally formed with the teeth ring, wherein with two positioning teeth as a group, multiple groups of the positioning teeth are equidistantly distributed along the length direction of the teeth ring, the two positioning teeth of each group are located on the edge of the teeth ring respectively, and the two positioning teeth of the same group are distributed in a staggered manner at an angle of 0˜45°.