Embedded pole of ring main unit

Abstract

The utility model discloses a ring main unit solid-sealed polar pole which is characterized in that a copper pole insert of a movable end is arranged at the left end of a solid-sealed polar pole body, a circle of square epoxy resin casting insulating part is arranged between the copper pole insert and the solid-sealed polar pole body, and a tile-shaped epoxy resin casting solid-sealed insulating part is arranged at the other end of the solid-sealed polar pole body; after the scheme is adopted, the integral structure integration of the mechanical strength, the electrical insulation performance and the heat dissipation performance can be realized in a compact space.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ring main unit, especially a solid-sealed pole for the ring main unit. BACKGROUND

[0002] In the medium voltage switchgear, the solid-sealed pole is mostly applied in the vacuum circuit breaker and vacuum load switch, and provides external insulation and support for the vacuum arc-extinguishing chamber. The solid-sealed pole is produced by using APG pouring process after the epoxy resin is sent into the mold containing the vacuum arc-extinguishing chamber after preheating. The solid-sealed pole completely isolates the vacuum arc-extinguishing chamber and other conductive parts from the external environment, avoids damage of external force and external environment to the arc-extinguishing chamber and other conductive parts, and enhances the insulation strength. The solid-sealed pole greatly reduces the manual assembly workload and minimizes possible errors in the assembly process.

[0003] The traditional solid-sealed pole structure on the market is usually vertically connected with the vacuum arc-extinguishing chamber through upper and lower incoming line ends, the upper end is connected with the static contact of the vacuum arc-extinguishing chamber, the lower end is poured on the cylinder wall of the solid-sealed pole, and is connected with the moving end of the solid-sealed pole through a soft connection. There is a threaded insert for installation on the lower end surface of the solid-sealed pole. This solid-sealed pole has excellent performance, but its structure is particularly applied in the middle-mounted switchgear. It cannot be applied in the specially designed switchgear and ring main unit, and sensors need to be installed in the cabinet to display the high-voltage live signal. However, it is impossible to separately install sensors in the ring main unit with a smaller cabinet. SUMMARY

[0004] The utility model aims at providing a solid-sealed pole which has complete structure and function and can meet the electrical insulation requirements.

[0005] To achieve the above purpose, the utility model discloses a solid-sealed pole for a ring main unit, which comprises an epoxy resin solid-sealed pole body and an internal vacuum arc-extinguishing chamber. A copper column insert is arranged at the left end of the solid-sealed pole body as a moving end. A square epoxy resin pouring insulation piece is arranged between the copper column insert and the solid-sealed pole body. A tile-shaped epoxy resin pouring solid-sealed insulation piece is arranged at the other end of the solid-sealed pole body, which has two side insulation pieces. An insulation pull rod is directly connected with the moving end of the vacuum arc-extinguishing chamber. The right end of the solid-sealed pole is directly connected with the static end of the vacuum arc-extinguishing chamber and a copper conductor.

[0006] A sensor wiring threaded insert is sleeved on the copper column insert. A mesh internal sensor is arranged in the sensor wiring threaded insert, which can lead the high-voltage live signal in the cabinet to a live display.

[0007] After the above scheme is adopted, the utility model can ensure that the mechanical strength, electrical insulation performance and heat dissipation performance are integrated in a compact space. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1The utility model discloses a structure schematic drawing.

[0009] Figure 2 The utility model discloses another side structure structure schematic drawing.

[0010] Figure 3 The utility model discloses a structure sectional view.

[0011] Label explanation:

[0012] 1, epoxy resin solid seal pole body;2, square epoxy resin pouring insulation part;3, fixed support insert;4, solid seal insulation part;5, vacuum arc-extinguishing chamber;6, internal sensor;7, sensor wiring thread insert;8, copper column insert;9, the upper end surface thread insert of fixed copper bar. Specific implementation

[0013] In order to explain the technical content, construction features, realized purpose and effect of the utility model in detail, the following will be explained in detail in combination with embodiment and accompanying drawing.

[0014] Please refer to Figure 1 And Figure 2 , 3 The utility model discloses a ring main unit solid seal pole, including cylindrical epoxy resin solid seal pole body and the vacuum arc-extinguishing chamber 5 being arranged at its inside, the vacuum arc-extinguishing chamber 5 can be vacuum circuit breaker or vacuum load switch, and the incoming and outgoing line end is arranged in the epoxy resin body outside and is integrally poured, and the copper column insert 8 is the dynamic end at the one end of solid seal pole body 1, and a circle square epoxy resin pouring insulation part 2 is arranged between copper column insert 8 and epoxy resin solid seal pole body, to ensure that the creepage distance of live body is enough, and prevent live body from surface discharge on the surface of epoxy resin solid seal pole. The upper end surface thread insert 3 of four support beams that can fix epoxy resin solid seal pole on the both sides of ring main unit is arranged on the solid seal pole body 1. The other end of epoxy resin solid seal pole body 1 is provided with the solid seal insulation part 4 of epoxy resin pouring of tile shape, and it has two side insulation sheets, and the solid seal insulation part 4 strengthens the support strength on one hand, and ensures that the voltage of incoming and outgoing line end will not surface discharge under the opening state of vacuum arc-extinguishing.

[0015] Sensor wiring thread insert 7 is sleeved on copper column insert 8, and the netted internal sensor is arranged in sensor wiring thread insert 7, which can lead the high voltage live signal in the cabinet to the live display. The dynamic end of insulation pull rod and vacuum arc-extinguishing chamber is directly connected (not shown in the drawing), and the upper end surface thread insert 9 of fixed copper bar is directly connected with copper conductor at the lower end of solid seal pole (the position of static end of vacuum arc-extinguishing chamber 5). Figure 2

[0016] ​The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent shape or structure transformation or direct or indirect application in other related technical fields by using the content of the present application specification and drawings are also included in the patent protection scope of the present application.

Claims

1. A solid-seal pole for a ring main unit, a vacuum interrupter is arranged in the epoxy resin solid-seal pole cast by APG, characterized in that: The copper column insert is sleeved with a sensor wiring threaded insert on the copper column insert, the sensor wiring threaded insert is internally provided with a meshed internal sensor, and the meshed internal sensor can lead the high-voltage live signal in the cabinet to the live display.

2. The ring main unit stationary seal terminal post according to claim 1, characterized in that: The copper column insert is sleeved with a sensor wiring threaded insert on the copper column insert, the sensor wiring threaded insert is internally provided with a meshed internal sensor, and the meshed internal sensor can lead the high-voltage live signal in the cabinet to the live display.

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