CN210536969U - Injection molding joint for heating cable - Google Patents

Abstract

The utility model discloses a heating cable line injection molding connector, it is used for the butt joint of the cold line of heating cable line and hot line to fix, the cable line includes and wraps up parallelly earthed wire and hot line in sheath and shielding layer, the outer parcel of hot line and cold line has the insulating layer, the hot line is that stranded filament twines the turn round and forms, the hot line is through first fixed pipe riveting and tin filling formation tin filling layer with the cold line, the outer parcel has the pyrocondensation pipe to form hot line fixed knot structure; and the grounding wires of the two sections of heating cables are connected through the second fixing pipe in a riveting and pressing manner and are wrapped in the injection molding sealing cap together with the hot wire fixing structure. The heating cable cold and hot joint has the advantages of simple structure, strong practicability, high connection firmness of the ends of the cold and hot joints of the heating cable, good sealing performance, high safety and long service life; the manufacturing process is simple, has no strict requirements on all procedures, can save a large amount of manpower and material resources, and effectively improves the production efficiency and the production quality.

Description

Injection molding joint for heating cable

Technical Field

The utility model relates to a heating cable line joint of moulding plastics belongs to heating cable technical field.

Background

The heating cable is made into a cable structure, takes electric power as energy, and utilizes the alloy resistance wire to perform power-on heating so as to achieve the effect of heating or heat preservation. The structure of a heating cable is generally formed by connecting a cold wire, a hot wire and a cold wire in series, and the connection between two sections of cable wires is generally a hidden connector or a heat-shrinkable tube connector structure. The existing heat-shrinkable tube joint structure is generally sealed by a heat-shrinkable tube, but the heat-shrinkable tube joint structure has higher requirements on the heat-shrinkable process, has low connection firmness and more hidden dangers and faults after the existing production process is laggard, is easy to cause the reduction of the insulation and sealing performance after being buried underground for a long time, and shortens the service life; in addition, in order to improve the sealing quality, a plurality of layers of heat-shrinkable tubes are generally adopted for sealing, the manufacturing process is complicated, and the investment of manpower and material resources is increased.

In addition, when two sections of heating cables are butted, hot wires, cold wires and ground wires in the two sections of heating cables are easy to shift in the thermal shrinkage process, and the installation quality is affected.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a heating cable line joint of moulding plastics can overcome the not enough of prior art.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme: an injection molding joint for a heating cable is used for butt joint and fixing the ends of a hot wire and a cold wire of the heating cable, the heating cable comprises a grounding wire and a hot wire which are wrapped in a sheath and a shielding layer in parallel, and double-layer insulating layers are wrapped outside the hot wire and the cold wire; the hot wire is formed by winding and twisting a plurality of strands of filaments, the hot wire and the cold wire are riveted through a first fixing pipe and are filled with tin to form a tin filling layer, and a heat shrinkage pipe wraps the tin filling layer to form a hot wire fixing structure; and the grounding wires of the two sections of heating cables are connected through a second fixing pipe in a riveting and pressing mode and wrapped in the injection molding sealing cap together with the hot wire fixing structure.

The first fixing pipe and the second fixing pipe are both copper pipes.

The injection molding sealing cap is a PVC pipe.

Compared with the prior art, the utility model discloses a heating cable line injection joint, which adopts an injection joint structure to realize the butt joint and fixation of the ends of two sections of heating cable lines, firstly, the ends of the two sections of heating cable lines are peeled to obtain hot lines, cold lines and grounding lines corresponding to the hot lines and the cold lines; then the overlap of the hot wire and the cold wire is riveted through the first fixing pipe, tin filling is carried out to form a tin filling layer, and a thermal shrinkage pipe is wrapped outside the tin filling layer to form a hot wire fixing structure; then, the two sections of the butt-jointed ground wires are twisted and are riveted through a second fixing pipe after being lapped to form a ground wire fixing structure; and finally, the hot wire fixing structure and the ground wire fixing structure are molded in the injection molding sealing cap, so that the ends of the two sections of heating cables are firmly fixed, the insulativity and the sealing performance are good, the injection molding process can be adopted to ensure that the hot wire fixing structure and the ground wire fixing structure cannot displace in the injection molding process, and the connection quality of the hot wire fixing structure and the ground wire fixing structure is greatly improved.

The utility model has simple structure and strong practicability, ensures the connection firmness of the ends of the two sections of heating cables, has good sealing performance, high safety and long service life; the manufacturing process is simple, has no strict requirements on all procedures, can save a large amount of manpower and material resources, and effectively improves the production efficiency and the production quality.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention:

as shown in fig. 1, the injection molding joint for the heating cable line is used for butt joint and fixing the ends of a hot wire 4 and a cold wire 6 of the heating cable line, the heating cable line comprises a grounding wire 5 and a hot wire 4 which are wrapped in a sheath 1 and a shielding layer 2 in parallel, and the outer parts of the hot wire 4 and the cold wire 6 are wrapped with double-layer insulating layers 3; the hot wire 4 is formed by twisting a plurality of strands of filaments, the hot wire 4 and the cold wire 6 are connected in a riveting mode through a first fixing pipe 7 and are filled with tin to form a tin filling layer 8, and a heat shrink pipe 9 wraps the tin filling layer 8 to form a hot wire fixing structure; the hot wire 4 is connected with the grounding wire 5 corresponding to the cold wire 6 section through the second fixing pipe 11 in a riveting mode, and the hot wire fixing structure and the injection molding sealing cap 10 are wrapped.

The end socket is used for butt joint and fixing of the ends of two sections of heating cable lines, the two sections of heating cable lines respectively comprise a grounding wire 5 and a heating wire 4 which are wrapped in a sheath 1 and a shielding layer 2 in parallel, an insulating layer 3 is wrapped outside the heating wire 4, and the grounding wire 5 is formed by twisting a plurality of strands of filaments; the hot wires 4 of the two sections of heating cables are connected in a lap joint mode, and a first fixing pipe 7, a tin-filling layer 8 and a heat shrinkable pipe 9 are sequentially wrapped outside the two sections of heating cables to form a hot wire fixing structure; the hot wire 4 is connected with the grounding wire 5 corresponding to the cold wire 6 section in a lap joint mode, and the hot wire fixing structure are wrapped in the injection molding sealing cap 10.

The first fixing pipe 7 is a copper pipe and is used for preliminarily fixing the hot wire 4 and the cold wire 6 of the heating cable line, and then tin is poured to form a tin pouring layer 8, so that the hot wires 4 of the two sections of heating cable lines are firmly connected.

The second fixing pipe 11 is a copper pipe and is used for preliminarily fixing two sections of grounding wires, so that the connection reliability of the two sections of grounding wires is guaranteed.

The injection molding sealing cap 10 is a PVC sheath.

A manufacturing process based on the injection molding connector of the heating cable line specifically comprises the following steps:

s1, automatic peeling;

the end heads of the two sections of heating cable lines are put into a peeling machine for peeling, so that a hot line 4 section, a cold line 6 section and a corresponding grounding line 5 section are obtained respectively, and the sheath 1, the shielding layer 2 and the insulating layer 3 of the heating cable lines are arranged in a step shape;

s2, automatic twisting;

putting the section 5 of the grounding wire into a wire twisting machine, and twisting a plurality of strands of filaments together;

s3, riveting and fixing;

overlapping the hot wire 4 and the cold wire 6 together, and riveting and fixing the hot wire and the cold wire in a first fixing pipe 7 through a riveting press;

s4, thermal shrinkage after tin filling;

tin is poured outside the first fixed pipe 7 to form a tin pouring layer 8;

after cooling, adopting a heat shrinkable tube 9 for sealing and fixing to form a hot wire fixing structure;

s5, riveting the grounding wire;

the grounding wires 5 of the two sections of heating cables are lapped together and are riveted and fixed in the second fixing pipe 11 through a riveting machine to form a grounding wire fixing structure;

s5, injection molding;

and putting the hot wire fixing structure and the ground wire fixing structure into an injection molding machine together, and performing injection molding to form the injection molding sealing cap 10.

Claims (3)

1. The utility model provides a heating cable line joint of moulding plastics, it is used for heating cable line hot wire (4) and cold line (6) the end butt joint fixed, heating cable line is including wrapping up in sheath (1) and shielding layer (2) parallel earth connection (5) and hot wire (4), it has double-layer insulation (3), its characterized in that all to wrap up outward with cold line (6) to hot wire (4): the hot wire (4) is formed by twisting a plurality of strands of filaments, the hot wire (4) and the cold wire (6) are riveted and pressed through a first fixing pipe (7) and are filled with tin to form a tin filling layer (8), and a heat shrink pipe (9) wraps the tin filling layer (8) to form a hot wire fixing structure; the hot wire (4) is connected with the grounding wire (5) corresponding to the cold wire (6) section in a riveting mode through a second fixing pipe (11), and the hot wire fixing structure are wrapped in an injection molding sealing cap (10).

2. The injection molding joint for heat-generating cables of claim 1, wherein: the first fixing pipe (7) and the second fixing pipe (11) are both copper pipes.

3. The injection molding joint for heat-generating cables of claim 1, wherein: the injection molding sealing cap (10) is made of PVC injection molding material.

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