Insert structure for injection molding pipe fitting
By designing annular embedded sections and connecting sections in injection-molded pipe fittings, the problems of low bonding strength and water leakage of copper inserts were solved, achieving efficient anti-rotation, anti-detachment, and sealing effects of the inserts, and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-03-24
AI Technical Summary
Existing copper insert structures in plastic pipes suffer from problems such as low bonding strength, high cost, and water leakage caused by gaps between the plastic and copper.
The design incorporates an annular structure for the embedded section and the connecting section. The embedded section features a rectangular through groove and an annular anti-detachment groove, while the connecting section has an external thread structure and a shoulder structure to improve the bonding strength and anti-detachment performance. Water seepage is prevented by reducing the wall thickness and filling with plastic.
It improves the anti-rotation and anti-detachment properties of the insert, enhances the bonding strength between the plastic and the insert, reduces the risk of water leakage, and lowers production costs.
Smart Images
Figure CN224033319U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of plastic pipe connecting injection molding pipe fitting, specifically relates to a kind of insert structure for injection molding pipe fitting. BACKGROUND
[0002] At present, plastic pipeline is mostly connected by hot melting in water supply field, so many injection molding pipe fittings are used, and many of them contain copper inserts. The existing copper insert structure has the following problems:
[0003] 1) The copper insert will fall off after long-term use, and the bonding strength with the plastic part is not high;
[0004] 2) The copper insert cost accounts for a high proportion in the whole pipe fitting;
[0005] 3) Because the thermal expansion coefficients of plastic and copper are different, there is shear stress between plastic and copper, which can form a gap between plastic and insert, causing water seepage and other problems. INVENTION CONTENTS
[0006] In view of the above problems in the prior art, the purpose of the utility model is to provide an insert structure for injection molding pipe fitting, which can strengthen the bonding strength of copper insert and plastic part, prevent a gap from being formed between plastic and insert, and reduce production cost.
[0007] The utility model provides the following technical scheme: an insert structure for injection molding pipe fitting, which comprises an embedded section embedded in one side pipeline and a connecting section connected with another side pipeline; the inner parts of the embedded section and the connecting section are respectively provided with communicating channels, a group of anti-rotation and anti-falling through grooves are formed in the embedded section, and an anti-falling groove is arranged between the embedded section and the connecting section; the outer side of the connecting section is provided with an external thread structure for ensuring the connecting strength between the connecting section and the pipeline, and the inside is provided with a shoulder structure for improving the end face sealing effect.
[0008] Further, the embedded section and the connecting section are both annular structures.
[0009] Further, the group of through grooves are arranged along the circumferential direction of the connecting section, and the through grooves are rectangular groove structures.
[0010] Further, the anti-falling groove is an annular groove structure.
[0011] Further, the shoulder structure is located at the outer end face of the connecting section.
[0012] Further, the inner diameter of the embedded section is greater than that of the connecting section, and the inner diameter of the connecting section is 3-4mm larger than the pass diameter of the corresponding pipe fitting.
[0013] Compared with the prior art, the utility model has the following advantages:
[0014] 1) The utility model discloses, based on the design of the through groove structure on the connecting section, improve the anti -rotation and the anti -drop performance of the insert, and the flowing plastics passes through the through groove when injection molding, improve the combination strength of plastics and insert simultaneously, based on the design of the anti -drop groove structure, further increase the anti -drop performance of the insert,
[0015] 2) The utility model discloses, reduce the wall thickness of the connecting section, make the insert internal filling plastics, make the insert and medium not direct contact, avoid the situation of seepage,
[0016] 3) The utility model discloses, based on the design of the shoulder structure, when cooling, can reduce the shrinkage of the plastics end surface in the insert, improve the sealing effect at the end surface. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the whole structure schematic diagram of the utility model;
[0018] Figure 2 It is the sectional structure schematic diagram of the utility model;
[0019] Figure 3 It is the whole structure schematic diagram of the pipe fitting with insert;
[0020] Figure 4 It is the sectional structure schematic diagram of the pipe fitting with insert;
[0021] Figure 5 It is the whole structure schematic diagram of the existing insert;
[0022] Figure 6 It is the sectional structure schematic diagram of the existing insert;
[0023] Figure 7 It is the sectional structure schematic diagram of the pipe fitting with existing insert. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following combines the drawings and examples of the specification, and further detailed description is made to the utility model. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.
[0025] On the contrary, the utility model covers any substitution, modification, equivalent method and scheme made on the essence and scope of the utility model defined by the claim. Further, in order to make the public have a better understanding of the utility model, some specific details are described in the following detailed description of the utility model. The utility model can also be completely understood without the description of these details for the person skilled in the art.
[0026] Please refer to Figures 1-7 The utility model provides an insert structure for injection pipe fitting, which comprises an embedded section 1 and a connecting section 2 connected with each other, the embedded section 1 is arranged in a plastic pipe on one side through a plastic injection process, and the connecting section 2 is used for connecting with a pipe on the other side.
[0027] Specifically, the embedded section 1 is a cylindrical annular structure, a plurality of through grooves 1-1 are arranged on the embedded section 1 in a circumferential direction, the through grooves 1-1 are preferably in a rectangular structure, are used for preventing rotation and falling off, and flowing plastic passes through the grooves during injection molding, so that the bonding strength between the plastic and the insert can be improved.
[0028] Specifically, a ring-shaped anti-falling groove 1-2 is arranged at the connection between the embedded section 1 and the connecting section 2, so as to further improve the anti-falling performance of the insert.
[0029] Specifically, the connecting section 2 is a cylindrical annular structure, an outer side of the connecting section 2 is provided with an external thread structure 2-1, and the external thread structure 2-1 is a full thread, so as to ensure the strength of the connection with the pipe.
[0030] A shoulder structure 2-2 is arranged on an inner wall of the connecting section 2 at an outer end face, since the insert is filled with plastic, the plastic will shrink during cooling, which will cause the end face to be uneven and affect the sealing. Based on the design of the shoulder structure 2-2, the shrinkage of the end face of the internal plastic is small, and the sealing effect is effectively improved.
[0031] Specifically, the inner diameter of the embedded section 1 is greater than the inner diameter of the connecting section 2, and the inner diameter of the connecting section 2 is greater than the diameter of the corresponding pipe by 3-4 mm. In the embodiment, the inner diameter of the connecting section 2 is preferably greater than the diameter of the corresponding pipe by 4 mm.
[0032] Based on the structural design of the through grooves 1-1 and the anti-falling grooves 1-2, the weight of the insert is reduced, and the anti-falling and anti-rotation performance is better. Since the wall thickness of the connecting section is reduced, the insert can be filled with plastic, so that the insert and the medium (water) are not in direct contact, and there is no risk of water seepage. Based on the design of the shoulder structure, the shrinkage of the end face of the internal plastic of the insert can be reduced during cooling, and the sealing effect at the end face is improved.
[0033] The above merely describes preferred embodiments of the utility model and is not intended to limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. An insert structure for injection molded pipe fittings, characterized in that, The utility model relates to a kind of pipe fittings, including embedding section (1) embedded in one side pipe and connecting section (2) connected with other side pipe;The inside of embedding section (1) and connecting section (2) is respectively provided with channel being communicated, a group of anti-rotation and anti-disengagement through groove (1-1) are set on embedding section (1), and anti-disengagement groove (1-2) is provided between embedding section (1) and connecting section (2);The outside of connecting section (2) is provided with external thread structure (2-1) for ensuring the connecting strength between connecting section (2) and pipe, and its inside is provided with shoulder structure (2-2) for improving end face sealing effect.
2. An insert structure for injection molded plumbing according to claim 1, wherein The embedding section (1) and the connecting section (2) are both annular structures.
3. An insert structure for injection molded tubulars according to claim 2, wherein A group of the through grooves (1-1) are arranged along the circumference of the connecting section (2), and the through grooves (1-1) are rectangular groove structures.
4. A insert structure for injection molded tubulars according to claim 3, characterized in that, The anti-disengagement groove (1-2) is an annular groove structure.
5. A insert structure for injection molded tubulars according to claim 4, wherein The shoulder structure (2-2) is located at the outer end face of the connecting section (2).
6. A insert structure for injection molded tubulars according to claim 1, wherein The inner diameter of the embedding section (1) is greater than the inner diameter of the connecting section (2), and the inner diameter of the connecting section (2) is 3-4 mm larger than the nominal diameter of the corresponding pipe fitting.