Dry-type insulation GIS terminal for 110kV cross-linked polyethylene insulation power cable

Abstract

The utility model discloses a dry-type insulation GIS terminal for a 110kV cross-linked polyethylene insulation power cable, which is provided with an epoxy sleeve, the upper end of the epoxy sleeve is connected with a conductive connecting rod, the lower end of the epoxy sleeve is provided with a spring seat, the lower end face of the spring seat is connected with a tail pipe, and the tail pipe is connected with a lead screw. At least three cylindrical helical compression springs are arranged on the upper end surface of the spring seat and positioned in the epoxy sleeve, tip cone seats are connected onto the cylindrical helical compression springs, stress cones are arranged in the tip cone seats, and the upper end parts of the stress cones are connected with the conductive connecting rod; according to the utility model, the spring seat, the cylindrical helical compression spring and the tip cone seat are designed in the epoxy sleeve, so that the stress cone can be tightly connected with the conductive connecting rod above the stress cone through the positioning ring all the time, and a cable conductor can be stably connected with the corresponding stress cone and the conductive connecting rod all the time; and the connection service life can be correspondingly prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of equipment, especially a dry insulation GIS terminal for 110kV crosslinked polyethylene insulated power cable. BACKGROUND

[0002] At present, in the use process of large high-voltage power cable, large cable connection terminal needs to be used in many places, and the volume and weight of these large terminals are relatively large under normal circumstances, because they face large cross-section electric wire and cable, and connect two large cables together, especially in the relatively harsh outdoor environment, limited by the connection equipment, it is usually a troublesome thing, needs to be pretreated, stripped, connected, fastened and even welded on the cable joint part, which is time-consuming and laborious, one of which is a GIS terminal, under the conventional technical condition, the stress cone in its interior is set in the sleeve in advance, but it is not fixed firmly and is prone to moving and misplacing in the sleeve, resulting in that the relevant parts are not connected in place, affecting the cable connection effect. SUMMARY

[0003] The utility model discloses a dry insulation GIS terminal for 110kV crosslinked polyethylene insulated power cable, which has novel internal structure design and stable connection.

[0004] The specific scheme of the utility model is as follows: a dry insulation GIS terminal for 110kV crosslinked polyethylene insulated power cable has an epoxy sleeve, the upper end of the epoxy sleeve is connected with a conductive connecting rod, the lower end of the epoxy sleeve is provided with a spring seat, the lower end surface of the spring seat is connected with a tail pipe, at least three cylindrical spiral compression springs are arranged in the epoxy sleeve on the upper end surface of the spring seat, a top cone seat is connected with the cylindrical spiral compression springs, a stress cone is arranged in the top cone seat, the upper end of the stress cone is connected with the conductive connecting rod, and the conductor part of an external power cable is inserted into the inner side end surface of the conductive connecting rod from the tail pipe.

[0005] Further, the upper end surface of the stress cone is positioned and connected with the inner side end surface of the conductive connecting rod through a positioning ring.

[0006] Further, the inner wall of the stress cone is provided with a semi-conductive cone at the lower part; the top cone seat is a sleeve type cone seat, and the stress cone is arranged in the sleeve type cone seat.

[0007] Further, the inner side wall of the tail pipe is provided with an internal thread, which is screwed with the cable metal sleeve of the power cable.

[0008] Further, the tail pipe and the cable sheath of the power cable are connected by lead sealing treatment, and the outer wall is wrapped by waterproof tape.

[0009] The utility model discloses a spring seat, cylindrical spiral compression spring and top cone seat are designed in the epoxy sleeve, make stress cone can always be connected with the upper conductive connecting stick through the positioning ring, so that the cable conductor and corresponding stress cone, conductive connecting stick can always keep stable connection relation, also can corresponding prolong its connection service life, in addition, all parts in the terminal of the utility model can be dismantled, which is very important for the later maintenance, and can reduce the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is large -scale power cable structure schematic diagram;

[0011] Figure 2 It is the main view direction structure schematic diagram (half section) of the utility model.

[0012] In the drawing: 1 - epoxy sleeve, 2 and 13 - cable conductor, 3 - conductive connecting stick, 4 - positioning ring, 5 - stress cone, 6 - semi-conductive cone, 7 - top cone seat, 8 - cylindrical spiral compression spring, 9 - spring seat, 10 - tail pipe, 11 - lead sealing, 12 - waterproof tape, 13 - clamping plate, 14 - cable insulation, 15 - cable metal sleeve, 16 - cable sheath. DETAILED DESCRIPTION

[0013] The technical scheme of the utility model will be described clearly and completely in combination with the drawings of the utility model, and obviously, the described embodiments are only 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 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 normally, which is only for the convenience of describing the utility model or simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed or operated in a particular orientation, so it cannot be understood as the limitation of the utility model.

[0014] In the description of the utility model, still need to explain, unless another explicit provision and limit, 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 be indirectly connected through intermediate medium, 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.

[0015] Figure 1 It is the basic structure schematic diagram of large cable to be connected.

[0016] Referring to Figure 2 , the utility model is a kind of 110kV cross-linked polyethylene insulated power cable with dry-type insulation GIS terminal, with epoxy sleeve 1, the upper end of epoxy sleeve is connected with conductive connecting rod 3, conductive connecting rod generally extends outward, the lower end of the epoxy sleeve is provided with spring seat 9, the lower end surface of spring seat is connected with a tail pipe 10, further, the inner wall of the tail pipe in the utility model is provided with internal thread, which is screwed with the cable metal sleeve of power cable, at least three cylindrical helical compression springs 8 are arranged in the inside of epoxy sleeve on the upper end surface of spring seat, top cone seat 7 is connected on cylindrical helical compression spring, stress cone 5 is arranged in top cone seat, the upper end of stress cone is connected with the conductive connecting rod, and the cable conductor part in the external power cable is inserted into the inner side end surface of the conductive connecting rod from the tail pipe.Further, the upper end surface of the stress cone in the utility model is positioned and connected with the inner side end surface of the conductive connecting rod by positioning ring 4.Further, the inner wall of the stress cone in the utility model is provided with semi-conductive cone 6 at lower part;Top cone seat is sleeve type cone seat, and stress cone is arranged in sleeve type cone seat.Further, the tail pipe and the cable sheath junction of power cable in the utility model are treated with lead seal 11, and outer wall is wrapped with waterproof adhesive tape 12.

[0017] The utility model is a kind of GIS terminal, which is used to connect 110kV cross-linked polyethylene insulated power cable, so the stability of its connection is very important, and the utility model is just based on this requirement, the connection of stress cone in epoxy sleeve is improved, i.e. stress cone is arranged in a top cone seat, and top cone seat is pressed by cylindrical helical compression spring, so that it always maintains a pre-tightening force, and stress cone is kept in close connection with the conductive connecting rod above and the inserted cable conductor, which can maintain long-term stable use.

[0018] The utility model discloses a spring seat, cylindrical spiral compression spring and top cone seat are designed in the epoxy sleeve, make stress cone can always be connected with the upper conductive connecting stick through the positioning ring closely, such that the cable conductor and corresponding stress cone, conductive connecting stick can always keep the stable connection relation between, also can prolong its connection service life accordingly, in addition, each spare part in the utility model discloses the terminal can be dismantled, this is very important for the maintenance of later period, can reduce the maintenance cost.

Claims

1. Dry insulation GIS terminal for 110 kV cross-linked polyethylene insulated power cables with an epoxy sleeve, to the upper end of which a conductive connecting rod is connected, characterized in that: The lower end of the epoxy sleeve is provided with a spring seat, the lower end surface of the spring seat is connected with a tail pipe, at least three cylindrical spiral compression springs are arranged in the epoxy sleeve on the upper end surface of the spring seat, a top cone seat is connected on the cylindrical spiral compression springs, a stress cone is arranged in the top cone seat, the upper end of the stress cone is connected with the conductive connecting rod, and the conductor part of the external power cable is inserted into the inner side end surface of the conductive connecting rod from the tail pipe.

2. Dry insulation GIS termination for 110 kV cross-linked polyethylene insulated power cables according to claim 1, characterized in that: The upper end surface of the stress cone is positioned and connected with the inner side end surface of the conductive connecting rod through a positioning ring.

3. Dry insulation GIS termination for 110 kV cross-linked polyethylene insulated power cables according to claim 1, characterized in that: The inner wall of the stress cone is provided with a semi-conductive cone at the lower part; the top cone seat is a sleeve type cone seat, and the stress cone is arranged in the sleeve type cone seat.

4. Dry insulation GIS termination for 110 kV cross-linked polyethylene insulated power cables according to claim 1, characterized in that: An internal thread is arranged on the inner side wall of the tail pipe, and the internal thread is threadedly connected with a cable metal sleeve of the power cable.

5. Dry insulation GIS termination for 110 kV cross-linked polyethylene insulated power cables according to claim 1, characterized in that: The tail pipe and the cable sheath of the power cable are treated by lead sealing at the joint, and the outer wall is wrapped by waterproof adhesive tape.

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