CN216643357U

CN216643357U - Electric melting pipe fitting for copper-plastic composite PP-R pipeline

Info

Publication number: CN216643357U
Application number: CN202122912276.5U
Authority: CN
Inventors: 毛星剑; 高莉; 叶益辉; 陈伟
Original assignee: Linhai Weixing New Building Materials Co Ltd
Current assignee: Linhai Weixing New Building Materials Co Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-05-31
Anticipated expiration: 2031-11-25

Abstract

The utility model discloses an electric melting pipe fitting for a copper-plastic composite PP-R pipeline, which comprises a pipe fitting main body, a framework coating layer and a copper insert, wherein the pipe fitting main body is in a hollow cylinder shape, and two end parts are provided with electrode holes; the framework coating layer comprises electrode tips arranged at two ends and a thread groove area of an outer layer, the thread groove area is used for winding and positioning the resistance wire, the electrode tips are connected with two ends of the resistance wire, and the thread groove area is divided into an external cooling area, a middle welding area and an internal cooling area; the copper insert is the pipe segment form, sets up in inside cooling space position, and length is corresponding with inside cooling space length, and the surface is provided with the slot, combines fixedly through the inside cooling space of injection moulding and skeleton coating. According to the utility model, the antibacterial copper insert is arranged in the internal cooling area of the electric melting pipe fitting, so that the antibacterial effect is achieved, and the resistance wire is separated from the embedded copper insert by multiple times of injection molding, so that short circuit is prevented. The antibacterial body is locally embedded only in the inner region, thereby achieving the effect of reducing the cost.

Description

Electric melting pipe fitting for copper-plastic composite PP-R pipeline

Technical Field

The utility model belongs to the technical field of electric melting pipe fittings, and particularly relates to an electric melting pipe fitting for a copper-plastic composite PP-R pipeline.

Background

The electric melting pipe fitting is internally provided with a resistance wire, and when the electric melting pipe fitting is electrified and welded, the internal resistance wire generates heat to mutually fuse the pipe fitting and the pipe fitting together. When the electric smelting pipe fitting welds, need certain cooling space to ensure that the melting material is toward outer spilling over when welding, and electric smelting pipe fitting and tubular product installation generally adopt socket joint cooperation welding, consequently electric smelting pipe fitting and tubular product welding back, the inside butt joint department of inserted tubular product is to forming recess and certain pipe fitting and tubular product clearance. After the pipeline system is used for a long time, the water accumulated in the gap at the butt joint part has poor liquidity, microbes such as bacteria and algae can be easily bred, especially for an antibacterial pipeline, the antibacterial effect at the position of the common electric melting pipe fitting after welding is poor, and the integral antibacterial effect of the pipeline is influenced. The antibacterial material is expensive, so that if the antibacterial material is integrally added into the common electric melting pipe fitting, the manufacturing cost is high, the economic applicability is poor, and the popularization and the application are difficult.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the utility model provides an electric melting pipe fitting for a copper-plastic composite PP-R pipeline, which solves the problems that microorganisms such as bacteria and algae are possibly bred due to long-term water accumulation in a cooling area in the electric melting pipe fitting, and the whole addition of the pipe fitting is difficult to popularize due to expensive antibacterial materials.

In order to achieve the purpose, the utility model adopts the technical scheme that:

an electric melting pipe fitting for a copper-plastic composite PP-R pipeline comprises a pipe fitting main body, a framework coating layer and a copper insert, wherein the pipe fitting main body is in a hollow cylindrical shape, and electrode holes are formed in two end parts of the pipe fitting main body; the framework coating layer is of a hollow cylindrical structure matched with the pipe fitting main body and comprises electrode tips arranged at two ends and an outer thread groove area, the thread groove area is used for winding and positioning the resistance wire, the electrode tips are connected with two ends of the resistance wire, the thread groove area is divided into an external cooling area, a middle welding area and an internal cooling area, the external cooling area and the internal cooling area are used for transition connection of the resistance wire, the thread pitch is large, and the thread grooves in the middle welding area are densely distributed and used for heating and welding after the resistance wire is electrified; the copper insert is pipe section form, sets up in inside cooling zone position, and length is corresponding with inside cooling zone length, and the surface is provided with the slot, combines fixedly through the inside cooling zone of injection moulding and skeleton coating.

Furthermore, a limiting hole is formed in the radial position of the middle of the copper insert, and the limiting hole is limited during injection molding and used for marking the insertion depth of the pipe.

Furthermore, the electrode tip corresponds to the electrode hole, penetrates into the electrode hole, and is used for being connected with an external power supply.

Further, still be provided with the observation hole on the pipe fitting main part, the observation hole corresponds the setting in middle part weld zone position for observe the pipe fitting welding process.

Furthermore, the thickness of the joint part of the framework coating layer and the copper insert is thicker than that of the middle welding area.

Still further, the middle part weld zone is 2 sections, and the symmetric distribution is at the both ends of inside cooling space.

According to the electric melting pipe fitting for the copper-plastic composite PP-R pipeline, the antibacterial effect is achieved by arranging the antibacterial copper insert in the internal cooling area of the electric melting pipe fitting, and the resistance wire is separated from the embedded copper insert by multiple times of injection molding, so that short circuit is prevented. The antibacterial body is locally embedded only in the inner region, thereby achieving the effect of reducing the cost.

Drawings

Fig. 1 is a schematic cross-sectional structure view of an electrofused pipe fitting of the present invention;

fig. 2 is a perspective view of the electrofusion pipe fitting of the present invention;

FIG. 3 is a schematic cross-sectional view of a skeletal coating of the present invention;

FIG. 4 is a perspective view of the cladding layer of the skeleton of the present invention;

FIG. 5 is a schematic cross-sectional view of the copper insert of the present invention;

FIG. 6 is a perspective view of the copper insert of the present invention;

in the figure: 1. a tube body; 2. a framework coating layer; 3. a copper insert; 4. an electrode hole; 5. an electrode tip; 6. a thread groove region; 61. an external cooling zone; 62. a middle welding zone; 63. an internal cooling zone; 7. limiting; 8. an observation hole; 9. a trench; 10. and a limiting hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-6, the electric melting pipe fitting for the copper-plastic composite PP-R pipeline of the present invention is formed by multiple injection molding, and has a structure including a pipe fitting main body 1, a skeleton coating layer 2, and a copper insert 3, wherein the pipe fitting main body 1 is hollow cylindrical, and two end portions of the pipe fitting main body 1 are provided with electrode holes 4.

The framework coating layer 2 is of a hollow cylindrical structure matched with the pipe fitting main body 1 and comprises electrode tips 5 arranged at two ends and an outer threaded groove area 6, the electrode tips 5 correspond to the electrode holes 4, the electrode tips 5 penetrate into the electrode holes 4, and the electrode tips 5 are used for being connected with an external power supply and heating resistance wires (not marked in the figure); thread groove region 6 is used for the resistance wire winding location, and the resistance wire is built-in inside electric smelting pipe fitting according to the regional screw thread setting mode winding of thread groove, and electrode tip 5 links to each other with the both ends of resistance wire, thread groove region 6 divide into outside cooling district 61, middle part welding district 62 and inside cooling district 63, and outside cooling district 61 and inside cooling district 63 are used for resistance wire transitional coupling, and the pitch is great, does not play the effect of generating heat, and middle part welding district 62 thread groove arranges densely for the welding that generates heat after the resistance wire circular telegram, middle part welding district 62 is 2 sections, and symmetric distribution is at the both ends of inside cooling district 63.

The pipe fitting main body 1 is further provided with an observation hole 8, and the observation hole 8 is correspondingly arranged at the position of the middle welding area 62 and used for observing the welding process of the pipe fitting and observing whether the welding process is normal or not.

The copper insert 3 is in a pipe shape, is arranged at the position of the internal cooling area 63, has the length corresponding to the length of the internal cooling area 63, is provided with a groove 9 on the outer surface, and is combined and fixed with the internal cooling area 63 of the framework coating layer 2 through injection molding. The radial position of the middle part of the copper insert 3 is provided with a limiting hole 10, and a limiting hole 7 is formed during injection molding and is used for marking the insertion depth of the pipe and preventing the socket joint from being not in place.

Preferably, the composite part of the framework coating layer 2 and the copper insert 3 is thick, and the resistance wire is wound and then has a certain distance with the copper insert, so that the insulation effect is achieved, and short circuit is prevented.

The utility model relates to an electric melting pipe fitting for a copper-plastic composite PP-R pipeline, which comprises the following steps:

(1) placing the pre-selected and cast copper insert into a mold, and performing injection molding on the framework coating layer by adopting an injection molding process;

(2) after the framework coating layer is formed and cooled, sleeving a mold, and wiring resistance wires according to a certain wiring process; during specific wiring, resistance wires are distributed on the welding areas at the two ends respectively according to the thread groove arrangement mode of the welding area at the middle part, then the resistance wires at the two ends are connected in the thread grooves of the internal cooling area in a transition mode to form a whole resistance wire, and finally the two ends of the resistance wire are connected with the electric connectors at the two ends respectively, namely wiring is completed, and injection molding preparation is made;

(3) performing a secondary injection molding process to injection mold the electric melting pipe fitting main body;

(4) and finally, forming and cooling to finish the preparation of the copper-plastic composite PP-R pipeline electric melting pipe fitting.

Claims

1. An electric melting pipe fitting for a copper-plastic composite PP-R pipeline is characterized by comprising a pipe fitting main body (1), a framework coating layer (2) and a copper insert (3), wherein the pipe fitting main body (1) is in a hollow cylindrical shape, and two end parts of the pipe fitting main body (1) are provided with electrode holes (4); the framework coating layer (2) is of a hollow cylindrical structure matched with the pipe fitting main body (1) and comprises electrode tips (5) arranged at two ends and an outer thread groove area (6), the thread groove area (6) is used for winding and positioning a resistance wire, the electrode tips (5) are connected with two ends of the resistance wire, the thread groove area (6) is divided into an external cooling area (61), a middle welding area (62) and an internal cooling area (63), the external cooling area (61) and the internal cooling area (63) are used for transitive connection of the resistance wire, the thread pitch is larger than that of the middle welding area, and thread grooves of the middle welding area (62) are densely distributed and used for heating and welding after the resistance wire is electrified; the copper insert (3) is in a pipe section shape and is arranged at the position of the internal cooling area (63), the length of the copper insert corresponds to that of the internal cooling area (63), a groove (9) is formed in the outer surface of the copper insert, and the copper insert is combined and fixed with the internal cooling area (63) of the framework coating layer (2) through injection molding.

2. The electric melting pipe fitting for the copper-plastic composite PP-R pipeline according to claim 1, wherein a limiting hole (10) is formed in the radial position of the middle of the copper insert (3), and a limiting part (7) is formed during injection molding and is used for marking the insertion depth of the pipe.

3. The electrofusion pipe fitting for a PP-R copper-plastic composite pipe according to claim 2 characterised in that the electrode tip (5) corresponds to the electrode hole (4), the electrode tip (5) penetrates into the electrode hole (4), and the electrode tip (5) is used for connecting with an external power supply.

4. The electrofusion pipe fitting for a PP-R copper-plastic composite pipe according to claim 1, wherein the pipe fitting body (1) is further provided with an observation hole (8), and the observation hole (8) is correspondingly provided at a position of the middle fusion zone (62) for observing the fusion process of the pipe fitting.

5. An electrofusion pipe fitting for cu-plastic composite PP-R pipes as claimed in claim 4, characterised in that the joint of the skeleton-covering layer (2) and the copper insert (3) is thicker than the thickness of the central fusion zone (62).

6. Electrofusion pipe part for a cu-plastic composite PP-R pipe according to claim 1, characterised in that the middle fusion zone (62) is 2 segments, symmetrically distributed at both ends of the internal cooling zone (63).