US 11,920,714 B2
Sealing structure
Zhenbin Diao, Guangdong (CN); Ximin Li, Guangdong (CN); Xiyong Lin, Guangdong (CN); Jiajia Cheng, Guangdong (CN); Wenfeng Chen, Guangdong (CN); Huijian Cao, Guangdong (CN); and Ali Chen, Guangdong (CN)
Assigned to RIFENG ENTERPRISE (FOSHAN) CO., LTD., Foshan (CN); RIFENG ENTERPRISE GROUP CO., LTD., Foshan (CN); and RiFeng New Material Co., Ltd., Foshan (CN)
Appl. No. 17/295,044
Filed by RIFENG ENTERPRISE (FOSHAN) CO., LTD., Guangdong (CN); RIFENG ENTERPRISE GROUP CO., LTD., Guangdong (CN); and RiFeng New Material Co., Ltd., Guangdong (CN)
PCT Filed Jun. 5, 2020, PCT No. PCT/CN2020/094770
§ 371(c)(1), (2) Date May 19, 2021,
PCT Pub. No. WO2021/093316, PCT Pub. Date May 20, 2021.
Claims priority of application No. 201911124319.4 (CN), filed on Nov. 15, 2019.
Prior Publication US 2022/0307636 A1, Sep. 29, 2022
Int. Cl. F16L 37/092 (2006.01); F16L 37/088 (2006.01); F16L 37/091 (2006.01)
CPC F16L 37/0925 (2013.01) [F16L 37/088 (2013.01); F16L 37/091 (2013.01); F16L 37/0926 (2019.08); F16L 2201/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A sealing structure, comprising an inner pipe, an outer pipe, and a sealing ring, wherein the outer pipe is detachably sleeved on the inner pipe, a slot for inserting a pipe is formed between an inner wall of the outer pipe and an outer wall of the inner pipe, and the outer wall of the inner pipe is provided with a sealing groove for placing the sealing ring; the sealing ring comprises a main body provided with a lip; the sealing groove comprises a first sealing groove and a second sealing groove, the first sealing groove and the second sealing groove are stepped, and a depth of the first sealing groove is less than that of the second sealing groove; the bottom of the lip fits the bottom of the first sealing groove, a thickness of the lip in a non-compressed state is greater than the depth of the first sealing groove, and a width of the lip in the non-compressed state is less than that of the first sealing groove; and the bottom of the main body fits the bottom of the second sealing groove, and a thickness of the main body in the non-compressed state is less than or equal to the depth of the second sealing groove; and
the sealing structure comprises an indication ring disposed inside the slot, wherein the indication ring is pushed by the pipe to cross the lip, and the outer pipe is provided with an observation hole for observing whether the indication ring is moved into the position where it should be.