Manifold connection device
A manifold connection device includes a locking connector and a manifold having an inner wall and an outer wall. A threaded hole penetrates the inner wall and the outer wall, has an inner thread, and has an axial line identical to a locking direction. The locking connector includes a threaded section and a main section. The threaded section has an end surface and an outer thread. A flange portion is formed between the threaded section and the main section. The outer thread is screwed with the inner thread. The flange portion abuts against the outer wall. The end surface is aligned with the inner wall or protrudes from 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 0 or is less than or equal to 0.1.
1 . 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.
2 . The manifold connection device as claimed in claim 1 , wherein the length between the end surface and the inner wall in the locking direction is greater than or equal to 0 mm and is less than or equal to 3 mm.
3 . The manifold connection device as claimed in claim 2 , wherein a ratio of the length between the end surface and the inner wall in the locking direction to a length between the outer wall and the inner wall in the locking direction is less than 0 or less than or equal to 0.9.
4 . The manifold connection device as claimed in claim 1 , wherein the adhesive structure has an inner peripheral edge and an outer peripheral edge; the inner peripheral edge is connected to the end surface; the outer peripheral edge is connected to the part of the inner wall adjacent to the threaded hole.
5 . The manifold connection device as claimed in claim 1 , wherein a groove is formed on the flange portion; a seal ring is disposed on the groove; the seal ring abuts against the part of the outer wall adjacent to the threaded hole.
6 . The manifold connection device as claimed in claim 1 , wherein the outer thread is a sawtooth thread.
7 . The manifold connection device as claimed in claim 1 , wherein a surface of the outer thread and/or a surface of the inner thread are/is a roughened surface.
8 . The manifold connection device as claimed in claim 1 , wherein a cross-section of the manifold is in a rectangular shape; the connected portion is provided on a plate on a front side of the manifold; both the outer wall and the inner wall are flat and straight surfaces.
9 . The manifold connection device as claimed in claim 1 , wherein an outer peripheral surface of the main section is provided with a plurality of clamping surfaces; the plurality of clamping surfaces are provided around the outer peripheral surface of the main section and are arranged by intervals.
10 . The manifold connection device as claimed in claim 1 , wherein a through hole is provided in the locking connector; the through hole communicates with an inner portion of the manifold; a part of the through hole corresponding to the connecting section forms a tapered portion.