| 摘要 |
A bite-in type pipe connection structure is provided, the pipe connection structure being capable of, even if piping connection work is performed with a length of piping inserted insufficiently, minimizing deterioration of air-tightness at the joint portion, at which the piping is connected, due to an offset load acting on the piping. Also provided are a valve, a bite-in type pipe joint, and a refrigeration device using the bite-in type pipe connection structure. A ferrule (30) is provided with: a low-strength portion (34a) which, when a coupling member becomes fastened to a joint body by manually rotating the coupling member, allows the tip (36) of the ferrule (30) to deform so that the tip (36) restrains a length of piping which is to be connected; a step section (32b) which connects a front tapered surface (32a), which corresponds to the low-strength portion (34a), and a rear tapered surface (32c); and a rear section (30A) which is adjacent to the low-strength section (34a). The step section (32b) is formed so that the wall thickness of the rear section (30A) has a value which can air-tightly hold the piping to be connected. |
