Patent ID: 11937563
Assignee: nan
Field: Chemical engineering (Chemistry)
Classification: CPC A  B  F  Y | IPC A  B  F

Claim 3:
4. The greenhouse as claimed in claim 3, wherein an outer diameter of each of the two adjacent pipes is smaller than an inner diameter of the connecting pipe, an outer peripheral surface of one end of each of the sealing sleeves facing the connecting pipe has a pressing tapered surface circumferentially, when the two rotary sleeves are thread-tightened, each of the sealing tapered surfaces is capable of pressing against a larger end of the pressing tapered surface correspondingly, so that an end surface of each of the sealing sleeves is pressed against the end surface of the washer correspondingly, and a smaller end of each of the pressing tapered surfaces is embedded between an inner peripheral surface of the connecting pipe and the outer peripheral surface of the adjacent pipe correspondingly.