CN112201519A

CN112201519A - Insulating utmost point post and fixed switch of tangible surface

Info

Publication number: CN112201519A
Application number: CN202011214281.2A
Authority: CN
Inventors: 欧阳可进; 庄彬清; 赵彪; 潘强
Original assignee: Xiamen Good Ep Electrical Co ltd
Current assignee: Xiamen Good Ep Electrical Co ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-01-08

Abstract

The invention relates to an insulated pole and a solid switch with touchable surfaces, wherein the insulated pole comprises a shell, an incoming line conducting rod, an arc extinguish chamber, an outgoing line conducting rod, an incoming line grounding shielding net, a first voltage-equalizing cover, a second voltage-equalizing cover, an incoming line high-voltage shielding net, an outgoing line high-voltage shielding net and an outgoing line grounding shielding net, wherein the incoming line conducting rod, the arc extinguish chamber, the outgoing line conducting rod, the incoming line grounding shielding net, the first voltage-equalizing cover, the second voltage-equalizing cover. According to the invention, the conductive material is sprayed on the outer surface of the insulating pole, so that the insulating pole can be reliably and directly grounded, and the touchable surface is realized; in addition, a high-voltage-sharing structure is additionally arranged in the insulating pole, an internal electric field is uniform, the local discharge amount of the insulating pole is the lowest, and therefore the service life and the safety of the solid switch are improved.

Description

Insulating utmost point post and fixed switch of tangible surface

Technical Field

The invention relates to the field of high-voltage switch equipment, in particular to an insulating pole with a touchable surface and a solid switch.

Background

All live parts and switches of the existing solid insulation switch equipment are fully sealed in epoxy resin, the incoming and outgoing lines are connected by adopting the shielding touchable cable accessory, and the whole switch equipment is not influenced by the external environment. But the insulating utmost point post surface of many solid switch can't realize touchable or utmost point post partial discharge volume is higher, and product security and reliability are not high, probably leads to using and maintainer to have the potential safety hazard.

Disclosure of Invention

The invention aims to provide an insulating pole and a solid switch with touchable surfaces, so as to solve the problems. Therefore, the invention adopts the following specific technical scheme:

according to one aspect of the invention, an insulated pole with a touchable surface is provided, which comprises a shell, an incoming line conducting rod, an arc extinguish chamber, an outgoing line conducting rod, an incoming line grounding shielding net, a first voltage-equalizing cover, a second voltage-equalizing cover, an incoming line high-voltage shielding net, an outgoing line high-voltage shielding net and an outgoing line grounding shielding net, wherein the incoming line conducting rod, the arc extinguish chamber, the outgoing line conducting rod, the incoming line grounding shielding net, the outgoing line high-voltage shielding net and the outgoing line grounding shielding net are fixedly sealed in the shell, the shell is coated with conducting materials on the outer surface and provided with an incoming line end, an outgoing line end and a middle main body, the middle main body is provided with a cavity for installing an arc extinguish chamber actuator, an isolation knife and an actuator thereof, the incoming line grounding shielding net surrounds the incoming line conducting rod in the incoming line end, the first voltage-equalizing cover and the second voltage-equalizing cover are respectively positioned above and below the, and the outgoing line high-voltage shielding net surrounds the connection part of the isolation knife and the outgoing line conducting rod, and the outgoing line grounding shielding net surrounds the outgoing line conducting rod in the outgoing line end.

Further, the cavity is m-shaped.

Furthermore, the incoming line high-voltage shielding net comprises a circular pipe part and a groove-shaped part, the circular pipe part surrounds the moving end of the arc extinguish chamber, the groove-shaped part surrounds the connecting piece, and the outgoing line high-voltage shielding net is in a groove shape.

Further, the wire inlet end is L-shaped, the transverse part of the L-shape is connected with the top of the middle main body, and a reinforcing connecting part is arranged between the vertical part of the L-shape and the middle main body.

Furthermore, the wire inlet conducting rod is fixed on the top of the arc extinguish chamber through a screw, the first voltage-sharing cover is used for sharing the electric field generated by the screw, and the second voltage-sharing cover is used for sharing the static end electric field of the arc extinguish chamber.

Further, the conductive material includes a metallic or non-metallic conductive material.

Further, the metallic conductive material includes zinc or aluminum.

Further, the thickness of the conductive material is 10-20 microns.

Further, the housing is made of epoxy.

Furthermore, the incoming line grounding shielding net, the first voltage-sharing cover, the second voltage-sharing cover and the outgoing line grounding shielding net are made of conductor materials, and the incoming line high-voltage shielding net and the outgoing line high-voltage shielding net are made of semiconductor materials.

Furthermore, the thickness of the incoming line grounding shielding net, the first voltage-sharing cover, the second voltage-sharing cover, the incoming line high-voltage shielding net, the outgoing line high-voltage shielding net and the outgoing line grounding shielding net is less than 1 mm.

According to another aspect of the present invention, there is provided a solid state switch having an insulated pole as described above.

By adopting the technical scheme, the invention has the beneficial effects that: the conductive material is sprayed on the outer surface of the insulating pole, so that the insulating pole can be reliably and directly grounded, and the surface of the insulating pole can be touched; in addition, a high-voltage-sharing structure is additionally arranged in the insulating pole, an internal electric field is uniform, the local discharge amount of the insulating pole is the lowest, and therefore the service life and the safety of the solid switch are improved.

Drawings

To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

FIG. 1 is a schematic perspective view of a solid state switch of the present invention with the switch panel removed to show internal structure;

fig. 2 is another perspective view of the solid state switch of the present invention with one of the insulated poles broken away to show the internal structure;

fig. 3 is a perspective cross-sectional view of an insulated pole of the solid state switch shown in fig. 2;

fig. 4 is a perspective view of the incoming ground screen of the insulated pole shown in fig. 3;

fig. 5 is a perspective view of the outgoing line ground shield mesh of the insulated pole shown in fig. 3;

fig. 6 is a perspective view of an incoming high voltage shielding mesh of the insulated pole shown in fig. 3;

fig. 7 is a perspective view of the outlet high-voltage shielding net of the insulated pole shown in fig. 3.

Detailed Description

The invention will now be further described with reference to the accompanying drawings and detailed description.

Fig. 1 and 2 show a solid switch, which may include an insulating pole 1 (showing 3), a switch panel 2, a breaker operating mechanism 3, an isolation knife operating mechanism 4, etc., wherein an arc extinguish chamber 5, an isolation knife 6 and an actuating

member

7, 8 thereof are installed in the insulating pole 1, and the arc extinguish chamber 5 and the isolation knife 6 can be switched on and off through corresponding operating knobs of the breaker operating mechanism 3 and the isolation knife operating mechanism 4 on the switch panel 2, so as to realize the required switching function. Wherein, the surface spraying of insulating utmost point post 1 has conducting material for it can directly ground connection, thereby realizes that the surface is touchable. The conductive material may be a metallic conductive material such as copper, zinc, aluminum, or the like, or a non-metallic conductive material such as semiconductor paint, or the like. The thickness of the conductive material is typically around 10-20 microns. The specific structure of the insulated pole 1 will be described in detail below.

As shown in fig. 2 and 3, the insulated pole 1 includes a housing 11, and an incoming conductive rod 12, an outgoing conductive rod 13, an incoming ground shielding mesh 14, a first voltage-sharing cover 15, a second voltage-sharing cover 16, an incoming high-voltage shielding mesh 17, an outgoing high-voltage shielding mesh 18, and an outgoing ground shielding mesh 19 that are fixedly sealed in the housing 11. The arc chute 5, the housing 11 may be typically made of epoxy. The housing 11 has a wire inlet end 111, a wire outlet end 112 and an intermediate body 113. Wherein the line inlet end 111 is L-shaped, the lateral part of the L-shape is connected with the top of the middle body 113 and the vertical part of the L-shape is provided with a reinforcing connecting part 114 with the middle body 113. The intermediate body 113 has an m-shaped cavity for mounting the arc chute actuator 7 and the isolating blade 6 and its actuator 8. In the incoming line end 111, the incoming line ground shield 14 surrounds the incoming line conductive rod 12 to achieve voltage equalization of the electric field generated by the incoming line conductive rod 12. In the middle body 113, a first voltage-sharing cover 15 and a second voltage-sharing cover 16 are respectively located above and below the connection (specifically, the screw 21) of the incoming conducting rod 12 and the arc-extinguishing chamber 5, wherein the first voltage-sharing cover 15 is used for sharing the electric field generated by the screw 21, and the second voltage-sharing cover 16 is used for sharing the static-end electric field of the arc-extinguishing chamber 5. In the intermediate body 113, an incoming high voltage shielding mesh 17 surrounds the moving end of the arc chute 5 and its connection (not shown) to the isolation knife 6 for equalizing the voltage of the electric field generated by the moving end of the arc chute 5 and the connection. In the intermediate body 113, the outgoing line high-voltage shielding net 18 surrounds the connection part (i.e., the fixed contact) of the isolation knife 3 and the outgoing line conductive rod 20 to realize voltage equalization of the electric field of the fixed contact. In the outlet end 112, the outlet ground shielding net 19 surrounds the outlet conductive rod 13, and the voltage is equalized by the electric field generated by the outlet conductive rod 13. The voltage-sharing function of the incoming line grounding shielding net 14, the first voltage-sharing cover 15, the second voltage-sharing cover 16, the incoming line high-voltage shielding net 17, the outgoing line high-voltage shielding net 18 and the outgoing line grounding shielding net 19 can reduce the local discharge capacity of the insulated pole 1 to the minimum, for example, 14.4kV is less than or equal to 5 PC.

As shown in fig. 4 and 5, the incoming line ground shield 14 and the outgoing line ground shield 19 are both in the shape of circular pipes. The incoming line ground screen 14 is longer than the outgoing line ground screen 19. The incoming ground screen 14 and the outgoing ground screen 19 are each provided with a

corresponding wire connector

141 and 191 for grounding via the wire. The lead tab 141 of the incoming ground shielding mesh 14 is exposed on the reinforcing connection portion 114, and the lead tab 191 of the outgoing ground shielding mesh 19 is radially exposed at the outgoing end 112 for facilitating the wiring.

As shown in fig. 6 and 7, the incoming high voltage shielding net 17 comprises a circular pipe part 171 and a groove part 172, the circular pipe part 171 surrounds the moving end of the arc extinguish chamber 5 for equalizing the electric field of the moving end of the arc extinguish chamber, the groove part 172 surrounds the connecting piece between the arc extinguish chamber 5 and the isolation knife 6 for equalizing the electric field of the connecting piece, and the outgoing high voltage shielding net 18 is in a groove shape to avoid the moving path of the isolation knife 6. The incoming high voltage screen 17 and the outgoing high voltage screen 18 are each provided with a

respective lead connection

173 and 181, which are connected to the high voltage by a lead.

Preferably, the incoming line grounding shielding net 14, the first voltage-sharing cover 15, the second voltage-sharing cover 16 and the outgoing line grounding shielding net 19 are made of a conductor material, for example, the incoming line grounding shielding net 14 and the outgoing line grounding shielding net 19 are made of stainless steel, and the first voltage-sharing cover 15 and the second voltage-sharing cover 16 are made of aluminum alloy; the incoming high voltage screen 17 and the outgoing high voltage screen 18 are made of a semiconductor material, for example, made of pa66 plus thirty percent fiberglass. The thicknesses of the incoming line grounding shielding net 14, the first voltage-sharing cover 15, the second voltage-sharing cover 16, the incoming line high-voltage shielding net 17, the outgoing line high-voltage shielding net 18 and the outgoing line grounding shielding net 19 are usually less than 1 mm.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An insulating pole with a touchable surface is characterized by comprising a shell, an incoming line conducting rod, an arc extinguish chamber, an outgoing line conducting rod, an incoming line grounding shielding net, a first voltage-sharing cover, a second voltage-sharing cover, an incoming line high-voltage shielding net, an outgoing line high-voltage shielding net and an outgoing line grounding shielding net which are fixedly sealed in the shell, wherein the outer surface of the shell is sprayed with a conducting material and is provided with an incoming line end, an outgoing line end and a middle main body, the middle main body is provided with a cavity for installing an actuating part of the arc extinguish chamber, an isolation knife and an actuating part of the isolation knife, the incoming line grounding shielding net surrounds the incoming line conducting rod, the first voltage-sharing cover and the second voltage-sharing cover are respectively positioned above and below the connection part of the incoming line conducting rod and the arc extinguish chamber, the incoming line high-voltage shielding net surrounds the moving end of the arc extinguish chamber and a connecting piece between the arc extinguish, and the outgoing line high-voltage shielding net surrounds the connection part of the isolation knife and the outgoing line conducting rod, and the outgoing line grounding shielding net surrounds the outgoing line conducting rod in the outgoing line end.

2. The insulated pole of claim 1, wherein the cavity is m-shaped.

3. The insulated pole post of claim 2, wherein the incoming high voltage shielding net comprises a circular tube part and a groove-shaped part, the circular tube part surrounds the movable end of the arc extinguishing chamber, the groove-shaped part surrounds the connecting piece, and the outgoing high voltage shielding net is groove-shaped.

4. The insulated pole of claim 1, wherein the wire inlet end is L-shaped, a lateral portion of the L-shape is connected to the top of the central body and a reinforcing connection is provided between a vertical portion of the L-shape and the central body.

5. The insulated pole post of claim 1, wherein the incoming conducting rod is fixed on the top of the arc extinguishing chamber by a screw, the first voltage-sharing cover is used for sharing the electric field generated by the screw, and the second voltage-sharing cover is used for sharing the static end electric field of the arc extinguishing chamber.

6. The insulated pole of claim 1, wherein the conductive material comprises a metallic or non-metallic conductive material.

7. The insulated pole of claim 6, wherein the metallic conductive material comprises zinc or aluminum.

8. The insulated pole of claim 1, wherein the housing is made of epoxy.

9. The insulated pole of claim 1, wherein the incoming line ground shield mesh, the first voltage-sharing cap, the second voltage-sharing cap and the outgoing line ground shield mesh are made of a conductor material; and the incoming line high-voltage shielding net and the outgoing line high-voltage shielding net are made of semiconductor materials.

10. A solid state switch having an insulated pole as claimed in any one of claims 1 to 9.