CN103151630B - Quick plug cable junction device - Google Patents

Abstract

The invention provides a quick plug-in cable connection device, comprising: an insulating body, a first plug joint, a second plug joint and a connecting copper rod; the insulating body is composed of two layers, the inner layer is insulating rubber, and the outer layer is semiconductive Rubber, the two layers are integrally combined into one; the connecting copper rod is arranged inside the insulating body along the center line of the insulating body; the two ends of the connecting copper rod respectively extend to the two end faces of the insulating body; the first plug joint is arranged at one end of the insulating body , used to connect the electrical connection of the high-voltage flexible cable; the second plug connector is arranged on the other end of the insulating body, and is used to connect the second plug connector of the XLPE cable electrical connection; the first plug connector and the second plug connector are connected by a copper rod electrical connection. The cable connecting device provided by the invention is a small device suitable for connecting high-voltage flexible cables and XLPE cables, so the electrical connection of the two cables can be well completed on site.

Description

A quick-plug cable connection device

technical field

The invention relates to cable connection technology, in particular to a quick-plug cable connection device between a high-voltage flexible cable and a cross-linked polyethylene (XLPE, Cross linked Polyethylene) cable.

Background technique

Distribution network bypass cable operation is currently a new type of emergency repair operation technology. It uses a high-voltage flexible cable, plug-in cable connector, bypass load switch and other bypass equipment to quickly build a network at the emergency repair site. Temporary transmission lines, to complete bypass operations across the original lines or temporary power acquisition and power supply operations.

Based on the basic principle of distribution network bypass operation technology, in order to greatly reduce the power outage time of users when replacing the ring network cabinet, the current operation method is usually: install a temporary ring network cabinet (or mobile ring network cabinet) on site, and then Connect the original incoming cable and user cable to the temporary ring network cabinet respectively, and then perform temporary power transmission. After the replacement of the ring network cabinet is completed, the temporary ring network cabinet is removed, the original line is restored, and the normal power transmission is carried out.

Due to the high hardness (and low bendability) of XLPE cables, in order to speed up the operation and reduce the power outage time during the above-mentioned entire operation process, some technicians will make temporary ring network cabinets (or mobile ring network cabinets) Cabinet) cable interface is improved to a quick plug-in electrical connection interface (quick plug-in cable connector) that can be electrically connected to the high-voltage flexible cable terminal, and a high-voltage flexible cable is used as a high-voltage electrical connection cable, because the high-voltage flexible cable can be bent The folding degree is high, so that the influence of terrain on the operation can be reduced.

However, the current operation still involves the problem of how to quickly connect the cable terminals of the incoming and outgoing lines of the original ring main unit to the high-voltage flexible cable terminals. Therefore, designing a device for connecting a high-voltage flexible cable to an XLPE cable is a solution to the above problems. A kind of existing device is to adopt the large-scale branch box of refitting, the inside design has the connection joint of two kinds of cables of two kinds of cables, connects by cable between the joints. But this device volume is too big, is not suitable for present indoor operation, needs a kind of volume is small, the connection device of high voltage flexible cable and XLPE cable that is convenient for operation badly.

Contents of the invention

In order to solve the above technical problems, the present invention provides a quick-plug cable connection device, which is a high-voltage flexible cable designed and developed to adapt to the development of distribution network bypass cable operation technology to connect with XLPE cables. Small device, compared with the existing technology, the cable connection device is greatly reduced in size, easy to carry, flexible in operation, and can complete the electrical connection of high-voltage flexible cables and XLPE cables in a small area, not only solving the problem of the two types of cables The technical problem of quickly completing the electrical connection on site is more suitable for the needs of rapid on-site operations and a wider range of operations. The cable connection device is a practical, safe and fast high-voltage cable connection device, which has great practical value and good economic and social benefits.

In order to achieve the above technical effects, the quick plug-in cable connection device provided by the present invention includes: an insulating body, a first plug connector, a second plug connector and a connecting copper rod;

The insulating body is composed of inner and outer layers, the inner layer is insulating rubber, the outer layer is semi-conductive rubber, and the two layers are integrally combined into one;

The connecting copper rod is arranged inside the insulating body along the center line of the insulating body; the two ends of the connecting copper rod respectively extend to the two end faces of the insulating body;

The first plug connector is arranged at one end of the insulating body, and is used for connecting a high-voltage flexible cable for electrical connection;

The second plug connector is arranged at the other end of the insulating body, and is used to connect the second plug connector for electrical connection of the XLPE cable;

The first plug connector is electrically connected to the second plug connector through a connecting copper rod.

Wherein, the first plug connector is a connector matched with a quick plug-in cable connector of a high-voltage flexible cable, and the second plug connector is a connector matched with a T-shaped connector of an XLPE cable.

Wherein, the inner wall of the first plug connector is provided with a self-locking connection device for automatically locking the inserted quick-plug type cable connector.

Wherein, the self-locking connecting device is made of stainless steel.

Wherein, the second plug connector is connected and fixed with the T-shaped connector of the XLPE cable through bolts.

Wherein, the two ends of the connecting copper rod are respectively formed with a first cavity and a second cavity for inserting the metal core of the quick plug-in cable joint and the metal core of the T-shaped joint.

Wherein, the second plug connector is covered with a protective cover for protecting the second plug connector.

Wherein, the insulating body, the first plug connector, and the second plug connector are all waterproof structures.

Wherein, the quick plug-in cable joint includes: a connecting sleeve and an insulating sleeve, and a connecting terminal, a cable core, and a cable arranged inside the connecting sleeve and the insulating sleeve and connected in sequence.

Wherein, the connecting sleeve is located at the front end of the quick plug-in cable connector, and the outer front end of the connecting sleeve is provided with a limiting groove for quick locking connection with the self-locking connection device.

The quick-plug cable connection device provided by the invention is a small device designed and developed to connect high-voltage flexible cables and XLPE cables to adapt to the development of distribution network bypass cable operation technology. Compared with the prior art, the cable connection device has a smaller volume Significant reduction, easy to carry, flexible operation, can complete the electrical connection of high-voltage flexible cables and XLPE cables in a small area, not only solves the technical problem of quickly completing the electrical connection of these two cables on site, but also is more suitable for rapid on-site According to the needs of the operation, it can adapt to a wider range of operations.

Description of drawings

Fig. 1 is a schematic diagram of the assembled structure of the quick-plug cable connection device provided by the present invention.

Fig. 2 is a schematic diagram of the exploded structure of the quick-plug cable connection device provided by the present invention.

Fig. 3 is a schematic cross-sectional structure diagram of the quick-plug cable connection device provided by the present invention.

Fig. 4 is a schematic cross-sectional structure diagram of the self-locking connection device in the quick plug-in cable connection device provided by the present invention.

Fig. 5 is a schematic diagram of the connection between the quick-plug cable connection device provided by the present invention and the quick-plug cable connector and the T-shaped connector of the XLPE cable.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to Fig. 1 to Fig. 5, Fig. 1 is a schematic diagram of the assembly structure of the quick-plug cable connection device provided by the present invention; Fig. 2 is a schematic diagram of the explosion structure of the quick-plug cable connection device provided by the present invention; Fig. 3 is a schematic diagram of the quick-plug cable connection device provided by the present invention Figure 4 is a schematic cross-sectional structure diagram of the self-locking connection device in the quick-plug cable connection device provided by the present invention; Figure 5 is a quick-plug cable connection device provided by the present invention and a quick-plug cable Connector, connection diagram of T-joint of XLPE cable.

As shown in the figure, the quick plug cable connection device includes: an insulating body 1 , a first plug connector 2 , a second plug connector 3 and a connecting copper rod 4 .

The insulating body 1 is L-shaped, and the insulating body 1 is enclosed with a connecting copper rod 4 arranged along the centerline of the insulating body 1; both ends of the connecting copper rod 4 extend to the ends of the insulating body 1 two ends.

The first plug connector 2 is located at one end of the insulating body 1 and is used to connect the high-voltage flexible cable for electrical connection; the second plug connector 3 is located at the other end of the insulating body 1 and is used for connecting the XLPE cable for electrical connection; the first The plug connector 2 is electrically connected to the second plug connector 3 through a connecting copper rod 4 .

Preferably, an aluminum protective cover 7 formed by splicing two opposite aluminum materials is provided at the corner of the insulating main body 1 . Preferably, the insulating body 1 is composed of inner and outer layers, the inner layer is insulating rubber, the outer layer is semi-conductive rubber, and the two layers are integrally combined into one. Preferably, the first plug connector 2 is a connector matching a quick plug-in cable connector of a high-voltage flexible cable, and the second plug connector 3 is a connector matching a T-shaped connector of an XLPE cable.

More specifically, the insulating body 1 is provided with a hollow cavity near its center line, and the cavity passes through the insulating body 1 . The connecting copper rod 4 is arranged in the cavity and extends to the first plug connector 2 and the second plug connector 3 . The two ends connecting the copper rod 4 are the first cavity 5 and the second cavity 6, the first cavity 5 and the second cavity 6 are hollow and provided with inner grooves (similar to blind holes). The first cavity 5 is used for inserting the metal core of the quick plug-in cable connector; the second cavity 6 is used for inserting the metal core of the T-shaped connector of the XLPE cable. Preferably, a strap contact is provided in the first cavity 5 and/or the second cavity 6 to ensure good contact between the first cavity 5 and the second cavity 6 and the wire core inserted therein. In this embodiment, the watchband contacts can be made of beryllium bronze in the prior art.

Further, the inner wall of the first plug connector 2 is provided with a self-locking connection device 8 for automatically locking the inserted quick-plug type cable connector. The self-locking connection device 8 is a metal device with a spring and a locking mechanism in the prior art, so as to ensure that the first plug connector 2 and the quick plug-in cable connector complete the fast plug-in locking connection and separation. Preferably, the self-locking connecting device 8 is made of stainless steel. The second plug connector 3 can be connected and fixed with the T-shaped connector of the XLPE cable through bolts.

The quick plug-in cable joint 10 includes: a connecting sleeve 11 and an insulating sleeve 12 , and a connecting terminal 13 , a cable core 14 , and a cable 15 arranged inside the connecting sleeve 11 and the insulating sleeve 12 and sequentially connected. Wherein, the connecting sleeve 11 is located at the front end of the quick plug-in cable connector 10, and the front end of the connecting sleeve 11 is provided with a limiting groove, through which the fast locking connection between the connecting sleeve 11 and the self-locking connecting device 8 is realized. . The top of the connecting terminal 13 is inserted into the first cavity 5 of the connecting copper rod 4, and is in electrical contact with the strap contacts. The diameter of the top of the connecting terminal 13 is gradually reduced (the top of the connecting terminal 13 is preferably hemispherical), so as to It is ensured that when the connecting terminal 13 is inserted into the first cavity 5, the inner surface of the first cavity 5 will not be damaged, so that the electrical performance will not be affected.

Further, in the quick plug-in cable connection device provided in this embodiment, the second plug connector 3 is covered with a protective cover 9 for protecting the second plug connector 3, and the insulating body 1, the second connector Both the first plug connector 2 and the second plug connector 3 are of waterproof structure.

When the quick plug-in cable connection device provided by the present invention is in use, the protective cover 9 set on the second plug connector 3 is removed, and the T-shaped terminal of the ordinary XLPE cable is connected to the second plug connector 3 at one end of the insulating body 1. Make bolted connections. After the connection is completed, take off the dust cover of the self-locking device 8 in the first plug joint 2 at the other end of the insulating body 1, and complete the self-locking and quick locking of the quick plug-in terminal of the high-voltage flexible cable and the small end of the insulating sleeve. connect.

The quick-plug cable connection device provided by the present invention is a small device designed and developed to connect high-voltage flexible cables and XLPE cables to adapt to the development of distribution network bypass cable operation technology. Since the connection structure at both ends of the insulating body 1 is completely in accordance with the two It is designed according to the characteristics of the cable terminal installation, so the electrical connection of the two cables can be well completed on site. Compared with the existing technology, the cable connection device has a greatly reduced volume, is convenient to carry, and is flexible to operate. Complete the technical problems of electrical connection, and at the same time, it is more suitable for the needs of rapid operation on site, and adapts to a wider range of operations.

Claims (10)

1. A quick plug-in cable connection device, characterized in that it includes: an insulating body (1), a first plug connector (2), a second plug connector (3) and a connecting copper rod (4); The insulating body (1) is composed of inner and outer layers, the inner layer is insulating rubber, the outer layer is semi-conductive rubber, and the two layers are integrally combined into one; The connecting copper rod (4) is arranged inside the insulating body along the center line of the insulating body (1); the two ends of the connecting copper rod (4) respectively extend to the two ends of the insulating body (1). end face; The first plug connector (2) is arranged at one end of the insulating body (1), and is used for connecting a high-voltage flexible cable; The second plug connector (3) is arranged at the other end of the insulating body (1), and is used for connecting an XLPE cable; The first plug connector (2) is electrically connected to the second plug connector (3) through a connecting copper rod (4). 2. The quick-plug cable connection device according to claim 1, characterized in that, the first plug connector (2) is a connector that matches the quick-plug cable connector of the high-voltage flexible cable, and the second plug connector Connector (3) is a connector that matches the T-connector of the XLPE cable. 3. The quick-plug cable connection device according to claim 1, characterized in that, the inner wall of the first plug connector (2) is provided with a self-locking device for automatically locking the inserted quick-plug cable connector. Connection device (8). 4. The quick-plug cable connection device according to claim 3, characterized in that, the self-locking connection device (8) is made of stainless steel. 5. The quick plug-in cable connection device according to claim 1, characterized in that, the second plug joint (3) is connected and fixed to the T-shaped joint of the XLPE cable by bolts. 6. The quick plug-in cable connection device according to claim 1, characterized in that, the two ends of the connecting copper rod (4) are respectively formed with metal cores and T-shaped joints for quick plug-in cable joints The metal wire core is inserted into the first cavity (5) and the second cavity (6). 7. The quick plug-in cable connection device according to claim 1, characterized in that, the second plug connector (3) is covered with a protective cover (9) for protecting the second plug connector (3) . 8. The quick plug-in cable connection device according to any one of claims 1, characterized in that, the insulating body (1), the first plug connector (2), and the second plug connector (3) are all waterproof structure. 9. The quick-plug cable connection device according to any one of claims 1 to 8, characterized in that the quick-plug cable joint (10) comprises: a connecting sleeve (11) and an insulating sleeve (12) , and the connecting terminal (13), cable core (14), and cable (15) arranged inside the connecting sleeve (11) and the insulating sleeve (12) and connected in sequence. 10. The quick-plug cable connection device according to claim 9, characterized in that, the connecting sleeve (11) is located on the outermost side of the quick-plug cable connector (10), and the connecting sleeve (11) ) is provided with a limit slot for fast locking connection with the self-locking connection device (8) on the outside of the front end. the