| 摘要 |
A push-fit pipe coupling assembly 1 comprises a demount tool 10 and a pipe coupling 20. Each demount tool 10 is in the form of a part ring having an internal thread 14 and a pressing portion 15. Each coupling 20 comprises a body 21 having an exterior thread 21a and a demount collar 30. In use, the thread 14 of demount tool 10 engages with the exterior thread 21a. As the demount tool 10 moves, an abutting shoulder 16 of the pressing portion 15 comes into contact with the engaging portion 31 of demount collar 30. This forces an angled contact surface 32 to press on grab ring 28, which can feature teeth 29, preventing the teeth 29 from engaging with a pipe inserted into the coupling 20, allowing the relative position of pipe 2 and coupling 20 to be adjusted. The coupling 20 can further comprise a protection ring (26, fig. 2) between a seal ring (25, fig. 2) and the grab ring, sitting upon an internal shoulder or groove. |
