CN204012626U - A kind of cable joint syndeton - Google Patents

Abstract

A cable joint connection structure relates to a structure for processing the middle joint of the cable during cable construction, which solves the problem that the cable joint is easily affected by moisture and affects the power supply of the line. It includes a first cable and a second cable, the joints of the first cable and the second cable respectively include a first cable core, a first cable core protective cover, a second cable core, a second cable core protective cover, and the first cable The core protective cover and the second cable core protective cover are clamped through the groove and the protrusion. The cable core protective cover adopted by the utility model is a structure integrated with the cable core, and a double-layer groove and a clamping structure of a protrusion are adopted at the interface of the connection part of the two cable core protective covers, thereby avoiding moisture intrusion, and the cable The connection part of the core protection cover adopts a semi-arc shape, which can facilitate the staff to connect the two cable cores without hindering the construction.

Description

A cable joint connection structure

technical field

The utility model relates to a structure for processing intermediate joints of cables during cable construction, in particular to a connection structure for cable joints.

Background technique

Since the intermediate joint is the weakest link in the cable operation and the installation location is located underground, when the cable joint is not well sealed, moisture is easy to infiltrate into the joint, especially in the rainy season and where the groundwater level is shallow, the intermediate joint is more likely to be soaked in water. Accelerate the infiltration of water into the joints, resulting in a decrease in the insulation level of the cable, and the gradual expansion of partial discharge, resulting in failure of the cable joints and affecting the power supply of the entire line.

When the cable joint fails, the arc of the short-circuit current will instantly ignite the cable joint, affecting the safe operation of the surrounding adjacent cables. Most of the middle heads of power cables currently used are connected and fastened by adding other devices. Although the connections are all fastened, because the method adopted is separate from the cable, no matter how to deal with it, the time Longer seams will still cause moisture intrusion and affect power supply.

Utility model content

The purpose of the utility model is to provide a cable joint connection structure to solve the problem that the cable joint is easily affected by moisture and affects the line power supply.

The technical solution adopted by the utility model to solve the technical problem is: a cable joint connection structure, which includes a first cable and a second cable, and is characterized in that the joints of the first cable and the second cable respectively include first The cable core, the first cable core protective cover and the second cable core, the second cable core protective cover, the first cable core protective cover and the second cable core protective cover respectively include a first fixing part, a first connecting part and a second fixing part part, the second connecting part, the first fixing part and the second fixing part are respectively wrapped in the outermost layer of the cable core, and are trumpet-shaped near the cable core joint so that there is a winding between the cable core protective cover and the cable core gap; the first connecting part and the second connecting part are both semi-arc-shaped, and the end surface of the first connecting part, the side surface along the axis direction and the end surface of the connection between the first fixing part and the first connecting part are all provided with two concave holes. grooves, and the grooves are directly connected to each other, the end face of the second connecting part, the side surface along the axis direction, and the end face of the joint between the second fixing part and the second connecting part are provided with two bumps, and the bumps are connected to each other, the second The protrusions on the end faces of the two connecting parts can be snapped into the grooves on the end face of the joint between the first fixing part and the first connecting part, and the side grooves in the axial direction of the second connecting part can be snapped into the side recesses in the axial direction of the first connecting part. In the groove, the protrusion on the end face of the connection between the second fixing part and the second connecting part can be snapped into the groove on the end face of the first connecting part, and the first cable core protection cover and the second cable core protection cover form a seal after the snap connection cylinder.

The groove is in the shape of a dovetail groove, and the corresponding protrusion is in the shape of a dovetail.

The two side walls of the convex groove are respectively provided with arc-shaped grooves, and the corresponding two side walls of the convex block are respectively provided with arc-shaped protrusions.

A flame retardant layer is provided on the inner walls of the first cable core protective cover and the second cable core protective cover.

The beneficial effect of the utility model is that: the cable core protective cover adopted is a structure integrated with the cable core, and the interface of the connection part of the two cable core protective covers adopts a double-layer groove and a clamping structure of the protrusion, thereby avoiding To prevent moisture intrusion, the connection part of the cable core protection cover adopts a semi-arc shape, which can facilitate the staff to connect the two cable cores without hindering the construction; the cable core protection cover is in the shape of a trumpet near the end of the cable core to make the cable core There is a gap with the cable core protective cover, which is to make room for the size of the adjacent cable core to become larger after being wound.

Description of drawings

Fig. 1 is a schematic structural diagram of a first cable,

Fig. 2 is the A-A view of Fig. 1,

Fig. 3 is a view from direction B of Fig. 1,

Fig. 4 is a schematic structural diagram of a second cable,

Figure 5 is a C-C view of Figure 4,

Fig. 6 is the D direction view of Fig. 4,

Fig. 7 is a schematic diagram of the structure after the first cable is combined with the second cable,

FIG. 8 is an E-E view of FIG. 7 .

In the figure: 1 first cable core, 2 first cable core protective cover, 21 first fixing part, 22 first connecting part, 23 groove, 3 second cable core, 4 second cable core protective cover, 41 second The fixing part, 42 the second connecting part, 43 the bump.

Detailed ways

In the process of electric power construction, the laying of cables is particularly important, and most cables are laid underground, which has strict requirements on cable joints, because underground laying is not easy to observe and repair cable joints on the one hand, and on the other hand, the underground environment is poor. The main problem is moisture, and moisture is not like solid matter that can be easily blocked by some boxes and other equipment. As long as there is a gap, moisture can penetrate, so it brings a lot of trouble to the cable joint. It is easy to affect the power supply of the entire circuit, and even cause an explosion in severe cases. At present, the method of handling cable joints during construction generally adopts the form of explosion-proof boxes, and there is also a method of wrapping armor tape and fixing both ends. However, there are gaps between the connecting equipment and the cables, which is very easy to cause moisture to enter. In order to solve this problem, the utility model adopts the method of being integrated with the cable core, and prevents moisture intrusion through two parallel grooves and bumps. Through experiments, it is found that when a groove and bumps are connected, the moisture is still It will intrude along the gap. When two grooves and bumps are used for clamping, since the adjacent grooves form a continuous concave-convex structure, it can play a good role in blocking moisture. When using three groove structures, On the one hand, the size of the cable core protective cover is increased, and on the other hand, processing and installation are inconvenient. The specific structure is as follows:

As shown in Figure 1 and Figure 4, the utility model includes a first cable and a second cable, and the joints of the first cable and the second cable include a first cable core 1, a first cable core protective cover 2 and a second cable core respectively. Core 3, the second cable core protective cover 4, the first cable core protective cover 2 and the second cable core protective cover 4 respectively include the first fixing part 21, the first connecting part 22 and the second fixing part 41, the second connecting part 42. The first fixing part 21 and the second fixing part 22 are respectively wrapped in the outermost layer of the cable core, integrated with the cable core, and are trumpet-shaped near the cable core joint to make the gap between the cable core protective cover and the cable core There is a winding gap, and the size of the two cable cores becomes larger after winding. Using this structure can leave enough space for the cable core joints, and at the same time prevent the deformation of the cable core protective cover due to the increase in size; the first connecting part 22 and The second connecting portions 42 are all in a semi-arc shape, and form a column shape after splicing. As shown in Fig. 2 and Fig. 3, two grooves 23 are provided on the radial end surface of the first connecting part 22, the two sides along the axial direction and the end surface of the connection between the first fixing part 21 and the first connecting part 22, and The grooves 23 are directly connected to each other. As shown in FIG. 5 and FIG. 6 , the radial end surface of the second connecting part 42, the two sides along the axial direction, and the end surface of the joint between the second fixing part 41 and the second connecting part 42 are provided with There are two bumps 43, and the bumps 43 are connected to each other. As shown in Fig. 7 and Fig. 8, the protrusion 43 on the end face of the second connecting part 42 can snap into the groove 23 on the end face of the joint between the first fixing part 21 and the first connecting part 22, and the axial direction of the second connecting part 42 The side groove 23 of the first connecting part 22 can be snapped into the side groove 23 in the axial direction of the first connecting part 22, and the protrusion 43 on the end face of the connection between the second fixing part 41 and the second connecting part 42 can be snapped into the end face of the first connecting part 22 In the groove 23 of the first cable core 1 and the second cable core 3, after the first cable core 1 and the second cable core 3 are connected and wound, the end of the second connecting part 42 is aligned with the end of the first connecting part 22, so that the protrusion 43 snaps into the corresponding In the groove 23, the first cable core protection cover 2 and the second cable core protection cover 4 are relatively slid until the end face protrusion 43 of the second connecting part 42 snaps into the groove 23 on the first fixing part 21 , at the same time, the protrusion 43 on the second fixing part 41 is just snapped into the groove 23 on the end face of the first connecting part 22, and the first cable core protection cover 2 and the second cable core protection cover 4 form a seal after the snap connection cylinder.

Further, in order to strengthen the connection between the first cable core protection cover and the second cable core protection cover, the groove 23 may adopt a dovetail groove, and the protrusion 43 may adopt a dovetail shape corresponding to the groove 23 .

One step further, the side wall of the groove 23 is symmetrically provided with two arc-shaped grooves, and the two side walls of the projection are respectively provided with arc-shaped protrusions to match the arc-shaped grooves, which increases the tightness of the combination on the one hand. On the other hand, it increases the moisture resistance.

In order to further improve safety, a layer of flame retardant layer is provided on the inner wall of the first cable core protective cover and the second cable core protective cover to prevent electric leakage of the cable joint from igniting and burning the protective cover.

Claims (4)

1. a cable joint syndeton, comprise the first cable and the second cable, it is characterized in that, the joint of described the first cable and the second cable comprises respectively the first cable core, the first cable core protective cover and the second cable core, the second cable core protective cover, the first cable core protective cover and the second cable core protective cover comprise respectively the first fixed part, the first connecting portion and the second fixed part, the second connecting portion, described the first fixed part and the second fixed part are wrapped in respectively cable core outermost layer, are being horn-like so that leave winding space between cable core protective cover and cable core near cable core joint, described the first connecting portion and the second connecting portion are semiarc shape, the end face of the first connecting portion, along the side of axis direction and the junction end face of the first fixed part and the first connecting portion be equipped with two grooves, and groove is directly interconnected, the end face of the second connecting portion, along the side of axis direction and the junction end face of the second fixed part and the second connecting portion be equipped with two projections, and projection interconnects, the projection of the second connecting portion end face can snap in the groove of junction end face of the first fixed part and the first connecting portion, the lateral grooves of the second connecting portion axis direction can snap in the lateral grooves of the first connecting portion axis direction, the projection of the junction end face of the second fixed part and the second connecting portion can snap in the groove of the first connecting portion end face, after clamping, the first cable core protective cover and the second cable core protective cover form the cylinder of sealing.

2. the syndeton of a kind of cable joint according to claim 1, is characterized in that, described groove is dovetail groove shape, and corresponding projection is dovetail shaped.

3. the syndeton of a kind of cable joint according to claim 1, is characterized in that, described tongue two side is respectively equipped with arc groove, and corresponding projection two side is respectively equipped with arc convex.

4. according to the syndeton of a kind of cable joint described in the arbitrary claim of claim 1-3, it is characterized in that, the first cable core protective cover and the second cable core protective cover inwall are provided with one deck flame-retardant layer.