US 12,221,849 B2
Internal blowout-prevention gas-retaining connector for mine
Mingzhong Gao, Sichuan (CN); Ling Chen, Sichuan (CN); Jianan Li, Sichuan (CN); Cong Li, Sichuan (CN); Zhiqiang He, Sichuan (CN); Le Zhao, Sichuan (CN); Mingqing Yang, Sichuan (CN); Nianhan Wu, Sichuan (CN); and Bo Yu, Sichuan (CN)
Assigned to SICHUAN UNIVERSITY, Sichuan (CN)
Appl. No. 17/997,275
Filed by SICHUAN UNIVERSITY, Sichuan (CN)
PCT Filed Jan. 26, 2021, PCT No. PCT/CN2021/073845
§ 371(c)(1), (2) Date Oct. 27, 2022,
PCT Pub. No. WO2021/218253, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. 202010345496.1 (CN), filed on Apr. 27, 2020.
Prior Publication US 2023/0175339 A1, Jun. 8, 2023
Int. Cl. E21B 34/14 (2006.01); E21B 33/06 (2006.01); E21B 34/12 (2006.01)
CPC E21B 33/06 (2013.01) [E21B 34/12 (2013.01); E21B 34/14 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An internal blowout-prevention gas-retaining connector for mine, comprising:
a body comprising a valve pipe section having a first end and a second end and a connecting pipe section having a first end and a second end arranged from top to bottom, a second end of the valve pipe section being inserted into a first end of the connecting pipe section,
wherein a blowout-prevention valve seat is provided at the second end of the valve pipe section, and a blowout-prevention valve bonnet is rotatably connected to a bottom surface edge of the valve pipe section,
a torsion spring is provided on a bottom surface of the blowout-prevention valve bonnet, and
a first end of the torsion spring is connected to the bottom surface of the blowout-prevention valve bonnet, and a second end of the torsion spring is connected to an inner wall of the connecting pipe section,
wherein the blowout-prevention valve bonnet is elastically deformable, and
wherein: when the blowout-prevention valve bonnet is in an open state, the blowout-prevention valve bonnet is curved and is adapted to the inner wall of the female terminal section; and when the blowout-prevention valve bonnet is in a closed state, the blowout prevention valve bonnet is in a horizontal position relative to the female terminal section and is in a shape of a flat plate.