Overall prefabricated straight joint structure for high-voltage cable

Abstract

The utility model discloses an integral prefabricated straight joint structure for a high-voltage cable, which is provided with an insulating copper shell protection box, a grounding pole is arranged on the insulating copper shell protection box, two ends of the insulating copper shell protection box are respectively provided with a first cable connecting pipe and a second cable connecting pipe, and an insulating prefabricated member is arranged in the insulating copper shell protection box. A voltage-sharing sleeve is arranged in the insulating prefabricated member, a conductor connecting pipe is arranged in the voltage-sharing sleeve, the conductor connecting pipe is used for connecting cable conductors in the first cable and the second cable at the two ends, and a waterproof pouring agent is filled between the outer wall of the insulating prefabricated member and the inner wall of the insulating copper shell protection box; the cable connector is specially designed for two cable straight-through connectors, is very convenient for outdoor connection operation of large-size cables, is rapid and efficient in operation of connecting the two cables, is good in safety, can fully guarantee the connection stability of the cable connectors and the reliability of power transmission, and has good practical use and popularization values.

Description

TECHNICAL FIELD

[0001] The utility model relates to high -voltage transmission cable connecting structure technical field especially a kind of for high-voltage cable overall prefabricated straight-through joint structure. BACKGROUND

[0002] At present, in the use process of large high-voltage transmission power cable, large cable connection terminal needs to be used in many places, and these large terminals are usually relatively large in size and weight, because they are faced with large cross-section wire and cable, two large cables are connected together, especially in relatively harsh outdoor environment, limited by the limitation of connecting equipment, it is usually a troublesome thing, needs to be pre-processed, stripped, connected and fastened even welded to the cable joint part, it is time-consuming and laborious to operate, and the efficiency is extremely low, so it is necessary to design a prefabricated connector which is time-saving and labor-saving and high in safety. UTILITY MODEL CONTENTS

[0003] The utility model aims at the above situation, provide a kind of for high-voltage cable overall prefabricated straight-through joint structure, the overall prefabricated straight-through joint structure is made in the form of workshop prefabrication, directly installed and used in the field, it is convenient, fast and efficient.

[0004] The specific scheme of the utility model is: a kind of for high-voltage cable overall prefabricated straight-through joint structure has insulating copper shell protection box, grounding column is provided on insulating copper shell protection box, first cable connecting pipe and second cable connecting pipe are respectively arranged at the both ends of insulating copper shell protection box, insulating prefabricated part is arranged in insulating copper shell protection box, equalizing sleeve is arranged in the inside of insulating prefabricated part, conductor connecting pipe is arranged in the inside of equalizing sleeve, and the cable conductor in the first cable and the second cable at two ends is connected by the conductor connecting pipe, and the inner wall of insulating prefabricated part is filled with waterproof casting agent between the inner wall of insulating copper shell protection box.

[0005] Further, the insulating prefabricated part in the utility model is provided with prefabricated pipe made of liquid silicone rubber material, outer semiconductive layer is arranged on the outer wall of prefabricated pipe, semiconductive cone is arranged on the inner side wall of prefabricated pipe respectively near the port at two ends, and semiconductive pipe is arranged at the intermediate position of the inner side wall of prefabricated pipe.

[0006] Further, the first cable connecting pipe and the second cable connecting pipe in the utility model are the same structure, each includes cable metal sleeve connecting pipe and cable outer sheath connecting pipe, one end of cable metal sleeve connecting pipe is inserted into insulating copper shell protection box and connected with the outer wall of insulating prefabricated part, and the other end of cable metal sleeve connecting pipe is connected with cable outer sheath connecting pipe.

[0007] Further, the cable outer sheath connecting pipe is composed of waterproof adhesive tape and heat shrink tube, and the inner wall of the heat shrink tube is provided with internal threads.

[0008] Further, the two end heads of the insulating prefabricated part are provided with chamfered shapes.

[0009] The utility model discloses a design specially for two cable straight-through joints, and is very convenient for outdoor connection operation of large size cable lines, and can connect two cables quickly and efficiently, is safe, can fully guarantee the stability of cable joint connection and the reliability of power transmission, and has good practical use and popularization value. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 It is the front direction structure schematic diagram (including intermediate partial section) of the utility model;

[0011] Fig. 2 It is the front direction half cut structure schematic diagram (including cable internal connection part) of the utility model;

[0012] Fig. 3 It is the half cut structure schematic diagram of the insulating prefabricated part in the utility model.

[0013] In the drawing: 1 - first cable connecting pipe, 2 - grounding column, 3 - insulating copper shell protection box, 4 - insulating prefabricated part, 5 - equalizing sleeve, 6 - conductor connecting pipe, 7 - waterproof pouring agent, 8 - second cable connecting pipe, 9 - cable conductor, 10 - cable metal sleeve, 11 - cable outer sheath connecting pipe, 12 - cable metal sleeve connecting pipe, 13 - semiconductive cone, 14 - outer semiconductive layer, 15 - semiconductive pipe, 16 - prefabricated pipe. DETAILED DESCRIPTION

[0014] The technical scheme of the utility model will be described clearly and completely below in combination with the drawings of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the protection scope of the utility model. In the description of the utility model, it is necessary to explain that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship of the utility model product when being used commonly, only for the convenience of describing the utility model or simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed or operated in a particular orientation, therefore, cannot be understood as the limitation of the utility model.

[0015] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term '' set '', '' install '', '' connect '' should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through intermediate medium indirectly connect, can be two element inside intercommunication.For ordinary skilled person in the art, can understand the specific meaning of above-mentioned term in the utility model according to specific circumstances.

[0016] Reference Figs. 1-3 The utility model relates to a kind of high-voltage cable integral prefabricated straight-through joint structure, with insulating copper shell protection box 3, grounding column 2 is provided on insulating copper shell protection box, the both ends of insulating copper shell protection box are respectively provided with first cable connecting pipe 1 and second cable connecting pipe 8, insulating prefabricated part 4 is provided in insulating copper shell protection box, equalizing sleeve 5 is provided in the inside of insulating prefabricated part, conductor connecting pipe 6 is provided in equalizing sleeve, and cable conductor 9 in the first cable and the second cable of two ends is connected by conductor connecting pipe, waterproof casting agent 7 is filled between the outer wall of insulating prefabricated part and the inner wall of insulating copper shell protection box.Further, the first cable connecting pipe and the second cable connecting pipe in the utility model are the same structure, and each includes cable metal sleeve connecting pipe 12 and cable outer sheath connecting pipe 11, one end of cable metal sleeve connecting pipe is inserted into insulating copper shell protection box and is connected with the outer wall of insulating prefabricated part, and the other end of cable metal sleeve connecting pipe is connected with cable outer sheath connecting pipe.Further, the cable outer sheath connecting pipe in the utility model is composed of waterproof adhesive tape and heat shrink tube, and internal thread is provided on the inner wall of heat shrink tube.

[0017] Further, the insulating prefabricated part in the embodiment has prefabricated pipe 16 made of liquid silicone rubber material, outer semiconductive layer 14 is provided on the outer wall of prefabricated pipe, semiconductive cone 13 is respectively provided on the inner side wall of prefabricated pipe near the port of two ends, and semiconductive pipe 15 is provided at the intermediate position of the inner side wall of prefabricated pipe;Further, the outer wall of two end heads of the insulating prefabricated part in the utility model is provided in chamfered shape.

[0018] In the utility model, the structure of first cable connecting pipe 1 and second cable connecting pipe 8 is basically same, only slightly different in length and size, but its use is same operating mode.

[0019] The utility model discloses a kind of straight-through connector structures, before use, first to the end head part of first cable and second cable do some basic processing, for example, to the end head part is carried out cleaning treatment, end head part needs to cut the metal sleeve and outer sheath of cable, expose a section of cable conductor, the cross section of cable conductor needs to cut flat, smooth;Preparation is ready, cable conductor is inserted into the connector structure of the utility model, two ends two section cable conductor are inserted into the conductor connecting pipe inside of insulation prefabricated part simultaneously, until push not, butt in good order, then again the internal thread of heat shrink tube inner wall setting is rotated with cable metal sleeve tight, finally heating shrink, so that cable outer sheath connecting pipe and cable metal sleeve and cable outer sheath are connected closely.

[0020] In actual connection operation, generally need to wrap waterproof adhesive tape on each connecting part, do waterproof treatment well;The above operation process is very convenient and fast, relative to the use of traditional outdoor high-voltage cable connector, efficiency is greatly improved, and operating condition is not harsh.

[0021] The utility model discloses a design specially for two cable straight-through joints, very convenient for outdoor connection operation of large size cable line, connect two cable operation fast and efficient, good safety, can fully guarantee the stability of cable joint connection and the reliability of power transmission, has good practical use and popularization value.

Claims

1. A high voltage cable integral prefabricated dead end joint structure, characterized by: The application relates to an insulating copper shell protection box which is provided with a grounding column, a first cable connecting pipe and a second cable connecting pipe arranged at two ends of the insulating copper shell protection box, an insulating prefabricated part arranged in the insulating copper shell protection box, a pressure equalizing sleeve arranged in the insulating prefabricated part, a conductor connecting pipe arranged in the pressure equalizing sleeve and used for connecting cable conductors in the first cable and the second cable, and a waterproof pouring agent filled between an outer wall of the insulating prefabricated part and an inner wall of the insulating copper shell protection box; the insulating prefabricated part is provided with a prefabricated pipe made of liquid silicon rubber material, an outer semiconductive layer arranged on the outer wall of the prefabricated pipe, a semiconductive cone arranged on the inner side wall of the prefabricated pipe and close to the two ends, and a semiconductive tube arranged at a middle position of the inner side wall of the prefabricated pipe; and the outer walls of the two end heads of the insulating prefabricated part are arranged in a chamfered shape.

2. A structure for a high voltage cable integral prefabricated joint, according to claim 1, characterized in that: The first cable connecting pipe and the second cable connecting pipe are the same in structure and each include a cable metal sleeve connecting pipe and a cable outer sheath connecting pipe; one end of the cable metal sleeve connecting pipe is arranged in the insulating copper shell protection box and connected with the outer wall of the insulating prefabricated part, and the other end of the cable metal sleeve connecting pipe is connected with the cable outer sheath connecting pipe; and the cable outer sheath connecting pipe is composed of a waterproof adhesive tape and a heat shrink tube, and the inner wall of the heat shrink tube is provided with an internal thread.

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