CN210274578U

CN210274578U - Multi-strand hidden joint of heating cable

Info

Publication number: CN210274578U
Application number: CN201921227094.0U
Authority: CN
Inventors: 吕为安; 周正兵; 任玉
Original assignee: Guizhou East New Technology Development Co ltd
Current assignee: Guizhou East New Technology Development Co ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-04-07
Anticipated expiration: 2029-07-31

Abstract

The utility model discloses a stranded silk implicit expression of heating cable connects, it is used for different materials, the butt joint of the many stranded metal wires of minor diameter, including the many hot wire heating wire and the many cold wires of copper nickel alloy material, all wrapped up the silvered film at the end of many hot wire heating wire and many cold wires to the butt joint is brazed and is formed solid portion of linking, and the outside parcel of portion that links firmly has the insulating layer, is equipped with the earth connection parallel with it outside the insulating layer, and wraps up in proper order at the two outside shielding layer and the restrictive coating that have one shot forming from inside to outside. The utility model has simple structure, wide application range, is especially suitable for hidden joint structure of cold and hot wires of multi-strand cable, and has firm welding, high safety and long service life; the manufacturing process is simple, batch production can be realized, the production efficiency is high, and the production quality is good.

Description

Multi-strand hidden joint of heating cable

Technical Field

The utility model relates to a stranded silk implicit expression of heating cable connects 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 heating cable is generally formed by connecting a cold wire, a hot wire and a cold wire in series, the joint of the cold wire and the hot wire is connected by adopting an implicit joint, the implicit joint of the existing heating cable adopts a staggered spot welding stretching technology, the outer surface of the heating cable adopts an insulating layer, a waterproof layer and the like to wrap, lock and fix, and the heating cable has the advantages of good waterproof performance, simplicity, practicability, low cost and the like. For the multi-strand heating cable, the hot wire and the cold wire are both in a multi-strand structure, and the multi-strand heating cable has the advantages of long service life, difficult damage to welding parts and the like. The multi-strand heating cable on the market generally adopts an open joint, namely, after cold wires and hot wires are peeled and extruded, the cold wires and the hot wires are connected in a manual compression joint mode, a riveting press mode and the like, the outside of the multi-strand heating cable is sealed by a heat shrink tube or an injection molding mode, the open joint mode is adopted, the cold wires, the hot wires and the ground wires are firstly wrapped with structures such as an insulating layer, a shielding layer, a sheath layer and the like to be manufactured into a finished product, then the finished product is peeled and then is connected and fixed by the open joint, the production process is complex, and a large amount of material resources and manpower are wasted.

If the multi-strand heating cable is connected by the hidden connector, the production process is greatly simplified, and the investment of material resources and manpower is saved. However, the ends of the multiple wires are easy to scatter and branch, and the hot wires and the cold wires are small in diameter and different in material, so that the welding difficulty is high, the welding is not firm, the reliability is low, a large potential safety hazard exists, the welding process requirement is high, and batch production is difficult to form.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a stranded silk implicit expression of heating cable connects, 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:

the utility model provides a stranded silk implicit expression of heating cable connects, it is used for the butt joint of different materials, the many stranded metal wires of minor diameter, including the many silk heating wire and the many silk cold wires of copper-nickel alloy material many silk heating wire and the butt joint end of many silk cold wires all wrap up the silvered film and form solid portion of linking through the welding, have wrapped up in one shot forming's insulating layer outside linking firmly, are equipped with the earth connection parallel with the sum outside the insulating layer, and the two outside wraps up in proper order from inside to outside has one shot forming's shielding layer and restrictive coating.

The thickness of the silver coating layer at the butt joint end of the multi-wire heating wire and the multi-wire cooling wire is 0.01-0.05 cm, and the length is not more than 1 cm.

The silver coating is formed by a silver dipping process, and after the silver coating is dipped, the silver coating is cooled for more than 30s so that the butt joint end parts of the multi-wire heating wire and the multi-wire cooling wire form a fixed layer.

The fixing layer of the end of the multi-wire heating wire is butted with the fixing layer of the end of the multi-wire cooling wire, and a fixing connection part is formed by silver brazing.

The concentricity of the butt joint of the fixing layer of the end of the multi-wire heating wire and the fixing layer of the end of the multi-wire cooling wire is less than 0.5 mm.

Compared with the prior art, the utility model discloses a stranded silk implicit expression of heating cable connects, it is used for different materials, the butt joint of the many gynostemma pentaphylla metal filaments of minor diameter, it is applicable to the many heater heating wire of copper-nickel alloy material and is connected fixedly with many cold line ends of copper, it has the silvered film all to wrap up outside the butt joint end of many heater heating wire and many cold lines, make two butt joint end outer formation fixed layers, butt joint the end butt joint of many heater heating wire and many cold lines carries out resistance fiber welding afterwards, form solid portion of linking, the outside insulating layer that has a shaping of parcel in linking firmly, set up the parallel earth connection with it on the insulating layer, again wrap up one shot forming's shielding layer and restrictive coating from inside to outside in proper order in the two outside, can form heating cable line cold, the joint design of hot wire end connection. The silver coating is wrapped outside the ends of the multi-wire heating wire and the multi-wire cooling wire, so that the solidification force of the multi-wire heating wire can be increased, a plurality of stranded wires are combined together, the welding sectional area can be increased, the welding performance can be improved, the welding firmness can be ensured, the welding quality can be improved, and batch production can be realized; the processing technology is simplified, and the processing efficiency is improved.

The utility model has simple structure, wide application range, reliable welding, high safety and long service life, and is especially suitable for the hidden joint structure of the cold and hot wires of the small-diameter and multi-wire cable; the manufacturing process is simple, batch production can be realized, the production efficiency is high, and the production quality is good.

Drawings

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

Fig. 2 is a schematic view of the structure a-a in fig. 1.

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 and 2, a multi-strand hidden joint for a heating cable is used for butt joint of multi-stranded metal wires with different materials and small diameters, and comprises a multi-wire heating wire 1 made of a copper-nickel alloy material and a copper multi-wire cold wire 3, silver-plated layers 4 wrap ends of the multi-wire heating wire 1 and the multi-wire cold wire 3, a fixed connection part 5 is formed after the silver-plated layers are welded through resistance fiber welding, an insulating layer 6 formed in one step wraps the outside of the fixed connection part 5, a grounding wire 2 parallel to the insulating layer 6 is arranged outside the insulating layer 6, and a shielding layer 7 and a sheath layer 8 formed in one step wrap the outside of the insulating layer 6 from inside to outside in sequence, so that the multi-strand hidden joint structure for the heating cable is formed.

The end of multifilament heating wire 1 and multifilament cold wire 3 all wraps up behind the silvered film 4 and links firmly together through resistance fiber welding, forms heating cable's integral type heart yearn, and the parcel has insulating layer 6 outside the integral type heart yearn, and it has shielding layer 7, restrictive coating 8 to wrap up in proper order again after insulating layer 6 sets up earth connection 2, finally makes heating cable reach integral type heart yearn, insulating layer 6, earth connection 2, shielding layer 7, restrictive coating 8 from inside to outside one shot forming's purpose.

The silver coating layer 4 is used for adhering the ends of the multi-wire heating wire and the multi-wire cooling wire 3 to prevent the ends from being scattered and branched; the welding sectional area of the ends of the multi-wire heating wire 1 and the multi-wire cooling wire 3 can be increased, the welding performance is improved, the welding firmness can be ensured, and the welding quality is improved. The thickness of the silver coating 4 is 0.01-0.05 cm, and the length is not more than 1 cm.

The silver coating 4 is formed through a silver dipping process, and after the silver coating is dipped, the silver coating is cooled for more than 30s, so that the head of the multi-filament heating wire forms a fixed layer.

The fixed layer at the end of the multi-wire heating wire 1 is butted with the fixed layer at the end of the copper multi-wire cooling wire 3, and a fixed connection part is formed by silver brazing; and the concentricity of butt joint of the fixing layer at the end of the multi-wire heating wire 1 and the fixing layer at the end of the copper multi-wire cold wire 3 is less than 0.5mm, so that the butt joint quality of the hidden joint is ensured.

The double-layer 6 is of a double-layer insulation structure and comprises a high-temperature-resistant insulation inner layer 601 made of silicon rubber and an XLPE insulation outer layer 602; the shielding layer 7 is a metal shielding layer; the sheath layer 8 is a PVC high-temperature-resistant protective sleeve.

Claims

1. The utility model provides a stranded silk implicit expression of heating cable connects, it is used for the butt joint of different materials, the many stranded metal silk of minor diameter, including many hot wire heating wire (1) and the cold line of copper many silk (3) of copper nickel alloy material, its characterized in that: the butt joint end of the multi-wire heating wire (1) and the multi-wire cooling wire (3) is wrapped with a silver coating (4) and forms a solid connection part (5) through welding, an insulating layer (6) formed in one step is wrapped outside the solid connection part (5), a grounding wire (2) parallel to the insulation layer (6) is arranged outside the insulating layer, and a shielding layer (7) and a sheath layer (8) formed in one step are sequentially wrapped outside the insulating layer and the insulating layer from inside to outside.

2. A multi-strand concealed joint for a heating cable according to claim 1, wherein: the thickness of the silver coating (4) at the butt joint end of the multi-wire heating wire (1) and the multi-wire cooling wire (3) is 0.01-0.05 cm, and the length is not more than 1 cm.

3. A multi-strand concealed joint for a heating cable according to claim 2, wherein: the silver coating (4) is formed through a silver dipping process, and after silver dipping, the silver coating is cooled for more than 30s, so that the butt joint end parts of the multi-wire heating wire (1) and the multi-wire cooling wire (3) form a fixing layer.

4. A multi-strand concealed joint for a heating cable according to claim 3, wherein: the fixing layer at the end of the multi-wire heating wire (1) is butted with the fixing layer at the end of the multi-wire cooling wire (3), and a fixing connection part (5) is formed by silver brazing.

5. A multi-strand hidden joint for a heating cable according to claim 4, characterized in that: the concentricity of the butt joint of the fixing layer at the end of the multi-wire heating wire (1) and the fixing layer at the end of the multi-wire cooling wire (3) is less than 0.5 mm.