CN201303243Y - Plug-in reducing cable butting connector for high-voltage power cable - Google Patents

Abstract

The utility model discloses a plug-in type different-diameter cable butt joint for high-voltage power cables. Layer, install the first stress cone, occluder and wedge-shaped cylinder on the cable, the first spring cone supports the stress cone against the inner cone surface at one end of the main body of the joint, and a stop sleeve is provided between the stress cone and the connecting cylinder. The tailpipe with grounding terminal is installed on the main body of the joint; the second spring taper supports the second stress cone and mandrel against the inner cone surface of the other end of the main body of the joint; The shell corresponding to the taper. It can realize the docking of cables with different cross-sections. When a line of the docking cable is not ready, the ready cable can be run first. It does not need to be filled with any insulating casting agent. It is waterproof, moisture-proof, and mechanical damage-resistant. A plug for high-voltage power cables Pull-out reducing cable butt joint.

Description

Plug-in type different-diameter cable butt joint for high-voltage power cables

technical field

The utility model relates to a joint for high-voltage power cables, in particular to a plug-in type different-diameter cable butt joint for high-voltage power cables.

Background technique

With the continuous development of urban construction, cable power supply has become the mainstream of the city, the demand for high-voltage cross-linked cable accessories is increasing, and the types of products are also increasing. The existing high-voltage power cable joints mainly include: straight-through/insulated intermediate joints, branch joints, metal layer isolation joints, etc. Straight/insulated intermediate joints are the most common and most frequently used joints.

There are three types of straight-through/insulated intermediate joints most commonly used in the market today - rubber prefabricated joints, silicone rubber cold shrink joints and pre-expanded joints. Whether it is a rubber prefabricated joint, a silicone rubber cold-shrinkable joint, or a pre-expanded joint, it is technically difficult to meet the cable butt joint with a large difference in the outer diameter of the insulation (for example, 500mm ² and 800mm ² ), because the outer diameter of the cable insulation The air gap generated by the large difference will cause the partial discharge to be too large, and even lead to the possibility of the joint crawling through. Moreover, their installation method is to put the main body of the connector on the cable first, and then crimp the connection fittings, so the length of the cable is relatively long, and the main body of the connector itself does not have waterproof performance. Moisture-proof problem, installation is extremely inconvenient. When one line of the docking cable is not ready and the ready cable in it is required to run, the traditional three joints are not functionally fulfilled.

Utility model content

The technical problem to be solved by the utility model is to provide a method that can realize the docking of cables with different cross-sections, and when a branch line of the docking cable is not ready, the ready cable can be run first, without filling any insulating casting agent, waterproof and moisture-proof , High-voltage power cables resistant to mechanical damage use plug-in different-diameter cable butt joints.

In order to solve the above problems, the utility model provides a plug-in type different-diameter cable butt joint for high-voltage power cables. Integral casting molding, the outer surface of the protective shell is sprayed with an insulating sheath, the first stress cone matching the outer diameter of the cable insulation is installed on the cable, the core of the cable is provided with a snapper and a wedge-shaped cylinder, the second A spring taper supports the first stress cone against the inner tapered surface of one end of the joint main body, the articulator and the wedge-shaped cylinder are inserted into the connecting cylinder, and the stress cone and the There is a stop sleeve between the connecting barrels, and the tail pipe with the grounding terminal is installed on the joint main body through the metal insert and the tail pipe sealing ring; the second spring cone supports the second stress cone and the mandrel tightly On the inner tapered surface of the other end of the joint main body, a housing corresponding to the second spring taper holder is provided on the end surface of the joint main body.

The plug-in different-diameter cable butt joint for high-voltage power cables using the above-mentioned technical solution is mainly used for the connection of high-voltage power cables. The stress control unit that was originally integrally formed in the main body of the joint is separated, and the different-diameter cable that cannot be realized by conventional joints is realized. The butt joint of the diameter cable, the connection between the wedge-shaped barrel, the occluder and the cable core is a mold-free connection; the connection between the wedge-shaped barrel, the occluder and the main body of the joint is a plug-in connection. It adopts a plug-in structure that is extremely convenient for installation, which reduces the difficulty of construction. The overall structure is dry and does not need to be filled with any insulating pouring agent, which prevents failures caused by leakage. After the cable is processed, the stress cone is put on, and then the stop sleeve and the occluder are put on the cable core, and the wedge-shaped cylinder is installed on the occluder with a special tool according to the process requirements, and then the cable is inserted into the main body of the joint , so that the wedge-shaped cylinder is inserted into the connecting cylinder in the joint main body, and then the spring taper holder is installed on the joint main body, and then the tail pipe with the grounding terminal is installed according to the process requirements. Good corresponding sealing work, and reliable grounding of each grounding part.

To sum up, the utility model is small in size, light in weight, easy to install, and can realize the docking of cables with different cross-sections. When a line of the docking cable is not ready, the ready cable can be run first without filling. Plug-in reducing cable butt joints for high-voltage power cables with any insulating casting agent, waterproof, moisture-proof, and mechanical damage resistance.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a schematic diagram of another usage state of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Referring to Fig. 1, the joint main body 9 is formed by integral casting of the main insulation 7 based on high-performance insulating resin, the connecting cylinder 10, the shielding layer 8, the protective shell 11, and the metal insert 5, and the outer surface of the protective shell 11 is sprayed with insulating protection. The first stress cone 6 matching the outer diameter of the cable insulation is installed on the cable 1, the core of the cable 1 is provided with an occluder 13 and a wedge-shaped cylinder 12, and the first spring cone support 3 tightens the first stress cone 6. On the inner tapered surface of one end of the joint main body 9, the occluder 13 and the wedge-shaped cylinder 12 are inserted into the connecting cylinder 10, and a stop sleeve 14 is provided between the stress cone 6 and the connecting cylinder 10, and the tail pipe 2 with a grounding terminal passes through The metal insert 5 and the tailpipe sealing ring 4 are installed on the joint main body 9; the second spring taper 19 presses the second stress cone 18 and the mandrel 15 against the inner cone surface of the other end of the joint main body 9, and on the joint main body A housing 17 corresponding to the second spring taper 19 is provided on the end face of 9 .

See attached drawing 1, the stress control unit stress cone of the joint body is no longer formed as a whole with the main insulation, but is independent, so that the corresponding stress cone can be matched according to different cable sections to realize the docking of cables with different sections ; In this structure, a test plug composed of the second spring cone support 19, the second stress cone 18, the mandrel 15, and the housing 17 is installed in the joint plug-in hole at one end of the branch cable that is not ready, which can realize The requirement that one of the two butted cables run first.

Referring to Fig. 1, the first stress cone 6 and the second stress cone 18 are formed by pressure injection of polymer rubber, which has good rigidity and electrical insulation performance; the first stress cone 6 and the second stress cone 18 are pressed by the first stress cone The first spring cone support 3 and the second spring cone support 19 tighten the top stress cone on the conical wall of the joint body 9 to ensure reliable sealing performance and good product interface performance; the main insulation 7 is high-performance insulating resin using advanced vacuum casting molding technology It is processed without any tiny air gap inside to ensure the product's excellent partial discharge level and insulation reliability. The shielding layer 8 and the main insulation 7 are integrally cast in the protective shell 11. The main body of the joint 10 is a fully dry structure, waterproof and moisture-proof, and resistant to mechanical damage; The process of clamp crimping is extremely convenient for installation; it can be exposed or directly buried; no maintenance is required during operation.

The high-voltage power cable plug-in assembly type joint is mainly used for the connection of high-voltage power cables. It separates the stress control unit that was originally integrally formed in the main body of the connector, realizes the connection of cables with different diameters that cannot be realized by conventional connectors, and adopts a plug-in structure that is extremely convenient for installation, reducing the difficulty of construction. The whole is dry The structure does not need to be filled with any insulating casting agent, which prevents failures caused by leakage. After the cable is processed, the first stress cone 6 is put on, and then the stop sleeve 14 and the occluder 13 are put on the wire core of the cable 1, and the wedge-shaped cylinder 12 is installed on the occluder 13 with a special tool according to the process requirements, and then the Insert the cable 1 into the joint main body 9, insert the wedge-shaped cylinder 12 into the connecting cylinder 10 in the joint main body 9, then install the first spring cone holder 3 on the joint main body 9, and then connect the tail pipe 2 with the grounding terminal Install it according to the process requirements, do a good job of sealing, and ground each grounding part reliably.

Referring to Fig. 2, after one end of the original unready branch line cable is prepared, remove the test plug composed of the second spring cone support 19, the second stress cone 18, the mandrel 15, and the housing 17, and then insert the second cable 16 Stress cone, stop sleeve and occluder, and then insert the second cable 16 into the joint body 9, so that the wedge-shaped cylinder is completely inserted into the connection cylinder 10 in the joint body 9, and then the spring taper holder of the second cable 16 is installed On the joint main body 9, the tailpipe with the grounding terminal is installed according to the technical requirements, so that the requirements for the simultaneous operation of the two butt cables can be realized.

Claims (1)

1. A plug-in type different-diameter cable butt joint for high-voltage power cables, which is characterized in that: the main body (9) of the joint is composed of a main insulation (7) with a high-performance insulating resin as the base material, a connecting cylinder (10), a shielding layer (8), the protective shell (11), the metal insert (5) are integrally casted, the outer surface of the protective shell (11) is sprayed with an insulating sheath, and the cable (1) is installed on the cable (1) to match the outer diameter of the cable insulation. The first stress cone (6), the wire core of the cable (1) is provided with an occluder (13) and a wedge-shaped cylinder (12), and the first spring cone support (3) connects the first stress cone ( 6) Press against the inner tapered surface of one end of the joint main body (9), the occluder (13) and the wedge-shaped cylinder (12) are inserted into the connecting cylinder (10), and the stress cone ( 6) There is a stop sleeve (14) between the connecting cylinder (10), and the tailpipe (2) with a grounding terminal is installed on the said on the joint main body (9); the second spring taper support (19) tightens the second stress cone (18) and mandrel (15) on the inner tapered surface of the other end of the joint main body (9). A housing (17) corresponding to the second spring taper holder (19) is provided on the end surface of the joint main body (9).