CN210897828U

CN210897828U - Cable connector

Info

Publication number: CN210897828U
Application number: CN201922298311.1U
Authority: CN
Inventors: 蔡振军
Original assignee: Wuxi Global Electrical Equipment Co ltd
Current assignee: Wuxi Global Electrical Equipment Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-06-30
Anticipated expiration: 2029-12-19

Abstract

A cable connector for butt-jointing LLHT cable cores; the pipe joint comprises a joint body and tubular internal thread tightening heads positioned on two sides of the joint body, wherein an external thread pipe is arranged in the middle of the two sides of the joint body, pressing claws are arranged on two sides of the external thread pipe, and the tubular internal thread tightening heads correspond to the external thread pipe in size; the joint body, the external thread pipe and the pressing claw are made of conductive metal materials. The utility model has the advantages that: 1. the method is suitable for butting the cable cores in the LLHT cable; 2. the butt joint efficiency is high; 3. easy processing and low cost.

Description

Cable connector

Technical Field

The invention relates to a structure of a cable joint, in particular to a joint for quickly butting cable cores in an LLHT cable.

Background

LLHT cable is also known as long-line cable, and is commonly used for heat tracing and heating of long-distance overhead, buried pipelines, submarine pipelines, storage tanks in storage areas, etc., and is widely used in petroleum transportation pipelines, for example. But the use condition is worse and the installation process is more complicated. For example, when heating and heat preservation are carried out on medium heat transmission pipelines of large petrochemical enterprises, petroleum pipelines are often buried underground, so that the problem of LLHT joints in the installation and maintenance processes is caused.

In the prior art, when a general electric wire is connected, as shown in fig. 2, a typical connection mode is generally adopted, and the connection mode is generally performed in a mode of pressing from the side. However, this connection method can keep the electric wires conductive, but is not suitable for LLHT cables. The wire diameter of the core wire of the LLHT cable is large, the diameter of a single core wire is at least more than 2mm, a multi-strand stranded wire mode is not generally adopted in the LLHT cable, and when butt joint is needed, butt joint of a single wire is needed. If the conventional wire connection method is adopted, the compressed cable part is pressed on the inner wall of the butt joint, the contact area of the cable and the butt joint is often not large, the resistance of the partial position of the butt joint is not controllable, and finally the temperature of the position of the butt joint is greatly different from that of the LLHT cable at the rest position, which is not acceptable for the LLHT cable used for heating.

There is a need to find a quick way to interface cable cores in LLHT cables.

Disclosure of Invention

The invention aims to provide a joint suitable for butting cable cores in a LLHT cable, which adopts the following technical scheme in order to solve the technical problems:

a cable connector for butt-jointing LLHT cable cores; the connector comprises a connector body through which a cable core wire passes and tubular internal thread tightening heads positioned on two sides of the connector body, wherein an external thread pipe is arranged in the middle of the two sides of the connector body, pressing claws are arranged on two sides of the external thread pipe, and the tubular internal thread tightening heads correspond to the external thread pipe in size; the joint body, the external thread pipe and the pressing claw are made of conductive metal materials.

In particular, the cable core is a single copper wire; the joint body, the external thread pipe and the pressing claw are made of copper.

Particularly, the cable core is a single aluminum wire; the joint body, the external thread pipe and the pressing claw are made of aluminum.

In particular, the cable core is a single nickel wire; the joint body, the external thread pipe and the pressing claw are made of nickel.

Particularly, the cable core is a single copper-clad aluminum wire; the joint body, the external thread pipe and the pressing claw are made of copper.

In particular, the material of the tubular internal thread packing head is the same as that of the joint body, the external thread pipe and the pressing claw.

In particular, the length of the pressing claw is at least 0.3 cm.

Particularly, the inner diameter of the tubular internal thread tightening head in the extension direction of the outer side is gradually reduced.

The invention has the beneficial effects that: 1. the method is suitable for butting the cable cores in the LLHT cable; 2. the butt joint efficiency is high; 3. easy processing and low cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a prior art wire lug;

the labels in the figure are illustrated as follows:

1. a connector body; 2. a tubular internal thread packing head; 3. an externally threaded tube; 4. a pressing claw; 5. a cable core.

Detailed Description

The following provides a more detailed description of the embodiments and the operation of the present invention with reference to the accompanying drawings.

As shown in fig. 1, is a schematic structural diagram of the present invention.

First, for the description of the applicable field of the present invention, the LLHT cable, also known as an ultra-long wire cable, is a heating cable using a cable core as a heating element, and the inner diameter of a single core is more than 2 mm. The main differences from other heating cables are: the skin cable generates heat when working and is a steel pipe; the heating element with constant power is a resistance wire; the self-temperature-limiting heating belt heats by semiconductor materials; the electromagnetic induction coil is wound on the outer side of the pipeline and directly heats by the pipeline body. That is, the heating element or the heating principle thereof is different.

A joint for quickly butting cable cores 5 in an LLHT cable is characterized in that a joint body 1, an external thread pipe 3 and a pressing claw 4 are made of conductive metal materials; including the joint body 1 that supplies cable heart yearn 5 to pass from with lie in the tubulose internal thread compel tight head 2 that connects body 1 both sides, connect body 1 both sides middle part be external screw thread pipe 3, the both sides of external screw thread pipe 3 are the claw 4 that compresses tightly, tubulose internal thread compel tight head 2 and external screw thread pipe 3's size is corresponding. The structure of the invention is similar to that of the waterproof cable joint in the prior art, but the application fields of the two are different, and the aim of butt joint is also different. The joint body 1, the external thread pipe 3 and the pressing claw 4 are made of conductive metal materials, and the joint is also used as a part of a conductor after butt joint, so that the problem of out-of-control resistance after butt joint is solved, and the situation that the resistance is increased due to small contact surface at partial positions in a wiring mode in the prior art is avoided. When in butt joint, the insulation layer around the cable core wire is required to be completely stripped, and then the joint of the patent can be used for butt joint.

The cable core 5 is a single copper wire, a single aluminum wire, a single nickel wire or a single copper-clad aluminum wire, and the wires made of the above materials are all common materials of LLHT cables. The term "single" means that the cable core 5 is entirely integral and not formed by twisting a large number of thin wires. The copper wire, the aluminum wire and the nickel wire refer to the main material of the cable core 5, and include the cable core 5 plated with other metals on the surface layer, for example, a nickel-plated copper wire. In order to make the heating at each position uniform and prevent a local resistance change, the joint body 1, the male threaded pipe 3, and the pressing claw 4 are preferably made of the same material as the cable core. In a single copper-clad aluminum wire, a copper material is required.

The length of the pressing claw 4 is at least 0.3 cm, so that the surface of the pressing claw 4 can be in contact with the surface of a lead when the pressing claw 4 presses, and the longer the pressing claw 4 is, the larger the contact surface of the pressing claw 4 with the surface of the lead is, and therefore a blind spot with local high resistance cannot be generated in butt joint. The inner diameter of the tubular internal thread tightening head 2 in the extending direction towards the outside is gradually reduced, so that the firmness after the butt joint of the cable core wires 5 can be improved.

When the cable core wire butt joint device is used, the cable core wires 5 on the two sides penetrate through the tubular internal thread tightening head 2 and the pressing claw 4 to be inserted into the external thread pipe 3, and the tubular internal thread tightening head 2 is screwed down, so that the pressing claw 4 is tightly attached to the surface of the cable core wire 5 to realize butt joint. When the joint is selected, the difference between the inner diameter of the external thread pipe 3 and the wire diameter of the cable core 5 cannot be too large, and the contact surface between the pressing claw 4 and the cable core 5 is required to be large enough to achieve the purpose of the invention.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can understand that the modifications or substitutions within the technical scope of the present invention are included in the scope of the present invention.

Claims

1. A cable connector is characterized in that: for butting LLHT cable cores; the pipe joint comprises a joint body and tubular internal thread tightening heads positioned on two sides of the joint body, wherein an external thread pipe is arranged in the middle of the two sides of the joint body, pressing claws are arranged on two sides of the external thread pipe, and the tubular internal thread tightening heads correspond to the external thread pipe in size; the joint body, the external thread pipe and the pressing claw are made of conductive metal materials.

2. The cable connector according to claim 1, wherein: the cable core wire is a single copper wire; the joint body, the external thread pipe and the pressing claw are made of copper.

3. The cable connector according to claim 1, wherein: the cable core wire is a single aluminum wire; the joint body, the external thread pipe and the pressing claw are made of aluminum.

4. The cable connector according to claim 1, wherein: the cable core wire is a single nickel wire; the joint body, the external thread pipe and the pressing claw are made of nickel.

5. The cable connector according to claim 1, wherein: the cable core wire is a single copper-clad aluminum wire; the joint body, the external thread pipe and the pressing claw are made of copper.

6. The cable connector according to claim 1, wherein: the material of the tubular internal thread packing head is the same as that of the joint body, the external thread pipe and the pressing claw.

7. The cable connector according to claim 1, wherein: the length of the pressing claw is at least 0.3 cm.

8. The cable connector according to claim 1, wherein: the inner diameter of the tubular internal thread tightening head in the extending direction towards the outer side is gradually reduced.