一种塑料管件的宽面内螺纹嵌件结构
By introducing designs such as wide-faced cylinders, rectangular grooves, dovetail and narrow grooves, claws and ridges into the internal thread insert structure of plastic pipe fittings, the problems of insufficient strength, leakage prevention and anti-torsion function of traditional inserts are solved, and higher insert strength and anti-torsion effect are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI TIANLI IND CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional plastic pipe fittings with internal threads are insufficient in terms of strength, leak-proof and anti-torsion functions, and cannot meet the market's demand for higher quality.
A wide-face internal thread insert structure for plastic pipe fittings is designed. By incorporating structures such as wide-face cylinders, rectangular grooves, dovetail and narrow grooves, claws and ridges within the insert body, the strength and anti-torsion function of the insert are enhanced, and the strength of the insert is visually reflected on the appearance of the plastic pipe fitting.
It achieves comprehensive enhancement of insert strength, leak-proof and anti-torsion functions, and the strength of the insert can be intuitively reflected in the appearance of plastic pipe fittings, improving the strength and anti-torsion effect of threaded ports.
Smart Images
Figure CN224516287U_ABST
Abstract
Claims
1. A wide face internal thread insert structure for plastic pipe fittings, comprising an insert body (1) having a pipe internal thread (11) formed therein, characterized in that, The insert body (1) has a wide-faced cylinder (2) coaxially arranged on the outer wall of the opening end, and a central cylinder (3) coaxially arranged on the outer wall of the middle part. The wide-faced cylinder (2) has a rectangular groove (21) on the side facing the insert body (1). The outer wall of the central cylinder (3) has at least one dovetail groove (31) and at least one narrow groove (32) spaced apart along the axial direction. The outer wall of the central cylinder (3) has at least eight protruding ridges (33) evenly distributed along the circumferential direction. The insert body (1) has an axial groove (12) on the end face of the tail end. The end face of the insert body (1) has at least four protruding claws (4) evenly distributed along the circumferential direction. The outer walls of the insert body (1), the wide-faced cylinder (2), the central cylinder (3), the protruding ridges (33) and the protruding claws (4) are all provided with a rough layer.
2. A wide face internal thread insert structure for a plastic pipe fitting as defined in claim 1 wherein, The distance between the outer wall of the wide cylindrical (2) and the inner diameter of the internal thread (11) of the connecting pipe is set to be greater than 8 mm.
3. A wide face internal thread insert structure for a plastic pipe fitting as defined in Claim 2 wherein, The axial length of the wide-faced cylinder (2) is at least 5 mm.
4. The wide face male insert structure of a plastic pipe fitting according to claim 1, wherein The rectangular groove (21) is an annular groove that is coaxially opened with the wide-faced cylinder (2) and has a rectangular cross-section. The outer wall of the middle cylinder (3) has a demolding slope. The minor diameter of the rectangular groove (21) is consistent with the maximum outer diameter of the middle cylinder (3).
5. A wide face male insert structure for a plastic pipe joint as defined in claim 1 wherein, Both the dovetail groove (31) and the narrow groove (32) are provided with two channels. The two narrow grooves (32) are arranged between the two dovetail grooves (31) at intervals. The depth of the dovetail groove (31) and the depth of the narrow groove (32) are consistent. The depth of the narrow groove (32) is set as C2, and the depth C2≥1.0mm.
6. A wide face male insert structure for a plastic pipe joint as defined in claim 1 or 5 wherein, The dovetail angle a of the dovetail groove (31) is ≥20°, the mouth width of the dovetail groove (31) is set to E2, E2≥2mm, and the mouth width of the narrow groove (32) is set to E3, E3≤2.0mm.
7. A wide face male insert structure for a plastic pipe joint as defined in claim 1 wherein, The axial groove (12) is an annular groove that is coaxial with the central cylinder (3) and has a rectangular cross-section. The large diameter sidewall of the axial groove (12) is flush with the inner sidewall of the claw (4). The groove depth of the axial groove (12) is set to C3, where C3 ≥ 1.2 mm; and the opening width is set to E4, where E4 ≤ 2 mm.
8. A wide face male insert structure for a plastic pipe joint as defined in claim 7 wherein, The protruding claws (4) are evenly distributed in six directions around the circumference. The outer wall of the protruding claws (4) is an arc-shaped surface coaxial with the inner wall of the protruding claws (4). The outer diameter of the protruding claws (4) is equal to the outer diameter of the central cylinder (3). The major diameter of the axial groove (12) is set to D1, the outer diameter of the central cylinder (3) is set to d2, the thickness of the inner and outer sides of the protruding claws (4) is set to (d2-D1) / 2, and the height of the protruding claws (4) is set to L1, where L1≥2.0mm.
9. A wide face male insert structure for a plastic pipe joint as defined in claim 8 wherein, The convex ridges (33) are evenly distributed in twelve directions around the circumference. Six of the convex ridges (33) are aligned with the six convex claws (4). The convex ridges (33) penetrate the central cylinder (3) and are divided by the dovetail groove (31) and the narrow groove (32). The outer wall of the convex ridges (33) is arc-shaped.
10. The wide face male insert structure of a plastic pipe fitting according to Claim 1, wherein The insert body (1) has a positioning hole (13) that is coaxially opened through the bottom end of the internal thread (11) of the connecting pipe.