Manifold connection device

A manifold connection device, comprising:

• a manifold, wherein a side of the manifold is provided with a connected portion;
• an inner side of the connected portion is provided with an inner wall;
• an outer side of the connected portion is provided with an outer wall;
• the connected portion has a threaded hole;
• the threaded hole has an inner thread;
• two ends of the threaded hole penetrate through the outer wall and the inner wall, respectively;
• a locking direction is defined;
• the locking direction is identical to an axial line of the threaded hole;
• and
• a locking connector comprising a threaded section, a main section, and a connecting section that are coaxially connected in sequence;
• an outer diameter of the threaded section is less than an outer diameter of the main section;
• a flange portion is formed between the threaded section and the main section;
• the threaded section has an end surface;
• an outer thread is provided around the threaded section;
• the outer thread is screwed with the inner thread of the threaded hole;
• the flange portion abuts against a part of the outer wall adjacent to the threaded hole;
• the end surface is either aligned with the inner wall or protrudes out of the inner wall;
• a ratio of a length between the end surface and the inner wall in the locking direction to a maximum inner diameter of the manifold in the locking direction is equal to 0 or is less than or equal to 0.1;
• wherein an adhesive layer is provided between the inner thread and the outer thread;
• an adhesive structure is adhered to the end surface and a part of the inner wall adjacent to the threaded hole;
• the adhesive structure is annular and is connected to the adhesive layer.