CN209822536U

CN209822536U - Isolation grounding switch

Info

Publication number: CN209822536U
Application number: CN201921054261.6U
Authority: CN
Inventors: 任广民; 张鹏飞; 郑琬心
Original assignee: Xuchang Wei Shi Da Electric Co Ltd
Current assignee: Xuchang Wei Shi Da Electric Co Ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2019-12-20
Anticipated expiration: 2029-07-08

Abstract

The utility model relates to an isolation grounding switch, which comprises a switch bracket, wherein the switch bracket is provided with a first insulator, a second insulator and an operation insulator, one end of the first insulator and one end of the second insulator are fixed with the switch bracket, and the other end of the first insulator and one end of the second insulator are respectively provided with a first contact and a second contact; one end of the operating insulator is assembled on the switch bracket in a sliding mode, the other end of the operating insulator is provided with a conductive rod, and the conductive rod is driven by the operating insulator to be provided with an isolation switch-on position where the conductive rod is in conductive contact with the first contact and the second contact simultaneously and an isolation switch-off position where the conductive rod is in conductive contact with the second contact only; the switch bracket is provided with a grounding knife through a grounding switch main shaft, and the grounding knife is driven by the grounding switch main shaft to be provided with a grounding switch-on position in conductive contact with the first contact and a grounding switch-off position separated from the first contact. The isolating knife with rotary motion is eliminated, and the structure of the conducting rod with linear motion is changed, so that the overall size of the switch device is reduced, and the miniaturization is realized.

Description

Isolation grounding switch

Technical Field

The utility model relates to a high tension switchgear field, concretely relates to keep apart earthing switch.

Background

The 40.5kV air insulation indoor isolating switch commonly used at present is of GN27-40.5D type, and the isolating knife and the grounding knife are in a rotary motion mode. As shown in fig. 4 and 5, the switch includes a bracket, on which six insulators 60 are provided, each two of which constitutes one pole; three operating insulators 20 are installed on the rotating shaft for operating the opening and closing of the isolating knife. During opening, the operating crank arm drives the rotating shaft to rotate, so that the operating insulator 20 is pushed upwards, and the isolating knife 30 rotates for a certain angle to realize opening; when the switch is switched on, the operating crank arm drives the rotating shaft to rotate reversely, and then drives the isolating knife to rotate to the switch-on position. The grounding knife 40 is fixed on the grounding switch main shaft 50 and can rotate to realize the on-off of the grounding switch.

There is also a grounding bar 40 disposed below, as shown in fig. 6.

Because the insulation distance of 40.5kV indoor switch equipment in the air must be larger than 300mm (the altitude is below 1000 meters), the GN27-40.5D type disconnecting switch occupies a larger space when being installed, and can not be suitable for occasions requiring equipment miniaturization such as subways, tunnels and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an isolation earthing switch to solve the problem that current switchgear can not satisfy some occasions to the miniaturized demand of equipment.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the isolation grounding switch comprises a switch bracket, wherein a first insulator, a second insulator and an operation insulator are arranged on the switch bracket, one end of each of the first insulator and the second insulator is fixed with the switch bracket, and the other end of each of the first insulator and the second insulator is respectively provided with a first contact and a second contact;

one end of the operating insulator is assembled on the switch bracket in a sliding mode, the other end of the operating insulator is provided with a conductive rod, and the conductive rod is driven by the operating insulator to be provided with an isolation switch-on position where the conductive rod is in conductive contact with the first contact and the second contact simultaneously and an isolation switch-off position where the conductive rod is in conductive contact with the second contact only;

the switch bracket is provided with a grounding knife through a grounding switch main shaft, and the grounding knife is driven by the grounding switch main shaft to be provided with a grounding switch-on position in conductive contact with the first contact and a grounding switch-off position separated from the first contact.

Furthermore, the first insulator and the second insulator are obliquely arranged, and the oblique directions of the first insulator and the second insulator are opposite.

Further, the first insulator and the second insulator are arranged up and down, the operating insulator is located below the second insulator, and the grounding knife is located above the first insulator.

Furthermore, a slide rail is arranged on the switch support, the operating insulator is assembled on the slide rail in a sliding mode through the insulator support, and a slide block matched with the slide rail is arranged on the insulator support.

Further, the conducting rod is a cylindrical copper rod.

Furthermore, the first contact and the second contact are provided with inserting holes for inserting the conductive rods.

Furthermore, elastic conductive contact fingers are arranged in the insertion holes.

Further, the elastic conductive contact finger is a spring contact finger.

The utility model has the advantages that:

the utility model discloses an isolation earthing switch has cancelled original rotary motion's isolation sword, and has adopted a conducting rod, designs isolator into direct action type, and the linear motion through the conducting rod realizes simultaneously with the isolation separating brake position of first contact, the electrically conductive contact of second contact and the isolation separating brake position that the conducting rod only contacted with the second contact is electrically conductive. The rotary motion is changed into the linear motion, so that the longitudinal and transverse spaces of the switch device are saved, the whole volume of the switch device is reduced, and the requirement on miniaturization of the device on certain occasions is met.

Drawings

Fig. 1 is a front view of the isolation grounding switch of the present invention;

fig. 2 is a side view (on, off) of the isolation grounding switch of the present invention;

fig. 3 is a second side view of the isolation grounding switch of the present invention (the isolation switch is opened, the grounding switch is closed);

FIG. 4 is a front view of a prior art GN27-40.5D type switch;

FIG. 5 is a side view of FIG. 4;

figure 6 is another prior art configuration of a GN27-40.5D type switch.

The names corresponding to the respective marks in fig. 1 to 3:

1. the grounding switch comprises a grounding knife 2, an upper wiring terminal 3, an upper contact 4, an upper contact finger 5, a conductive rod 6, a lower contact finger 7, a lower contact 8, a lower wiring terminal 9, an operating insulator 10, a sliding block 11, a lower insulator 12, an upper insulator 13, a grounding switch main shaft 14, an insulator support 15, a sliding rail 16 and a switch support.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The utility model discloses keep apart earthing switch's embodiment 1:

as shown in fig. 1-3, the isolated ground switch includes a switch bracket 16, an upper insulator 12, a lower insulator 11, and an operating insulator 9 are disposed on the switch bracket 16, one end of each of the upper insulator 12 and the lower insulator 11 is fixed to the switch bracket 16, and the other end is respectively provided with an upper contact 3 and a lower contact 7. In this embodiment, the upper insulator 12 and the lower insulator 11 are arranged up and down, the operating insulator 9 is located below the lower insulator 11, and the grounding switch 1 is located above the upper insulator 12. The operating insulator 9 is a sliding insulator, and the upper insulator 12 and the lower insulator 11 are both fixed insulators.

The switch bracket 16 is equipped with a grounding switch 1 through a grounding switch main shaft 13, the grounding switch 1 is driven by the grounding switch main shaft 13 to rotate, and the switch bracket is provided with a grounding switch-on position in conductive contact with the upper contact 3 and a grounding switch-off position separated from the upper contact 3. As shown in fig. 2, the grounding switch is in the open position; fig. 3 shows the grounding switch in the closed position. The structure and action principle of the main shaft and the grounding knife of the grounding switch are similar to those of an isolation grounding switch in the prior art.

The upper insulator 12 and the lower insulator 11 are both obliquely arranged, the oblique directions of the upper insulator 12 and the lower insulator 11 are opposite, and the upper insulator 12 and the lower insulator are horizontally arranged in a V shape, so that the structure is compact.

The operating insulator 9 is arranged in parallel with the lower insulator 11, one end of the operating insulator 9 is slidably assembled on the switch bracket 16, and the other end is provided with the conducting rod 5. The conductive rod 5 is a spacer rod, and functions as a spacer knife. The conductive rod 5 is a cylindrical copper rod, so that the rigidity is good and the electromagnetic field is uniform. In other embodiments, other conductive materials may be used instead of copper for the conductive rods.

The switch bracket 16 is provided with a slide rail 15, the operating insulator 9 is slidably assembled on the slide rail 15 through an insulator bracket 14, and the insulator bracket 14 is provided with a slide block 10 matched with the slide rail 15. The conductive rod 5 can move linearly up and down under the driving of the up-and-down movement of the insulator bracket 14.

The upper contact 3 and the lower contact 7 are both provided with inserting holes for the conductive rods 5 to be inserted into, the inserting holes are round holes, and spring contact fingers are arranged in the inserting holes, so that the good conductive contact performance of the conductive rods and the corresponding contacts is improved. The spring contact fingers are respectively marked as an upper contact finger 4 and a lower contact finger 6.

The upper contact 3 is provided with an upper terminal 2 and the lower contact 7 is provided with a lower terminal 8.

The conductive rod 5 is driven by the operation insulator 9 to have an isolation switch-on position where the conductive rod is in conductive contact with the upper contact 3 and the lower contact 7 at the same time and an isolation switch-off position where the conductive rod 5 is in conductive contact with the lower contact 7 only. As shown in fig. 2, the conductive rod is at the isolation switching-on position, and the conductive rod 5 is elastically contacted with the upper contact finger 4 and the lower contact finger 6 to realize electrical conduction; when the switch is opened, the conducting rod 5 is driven by the operating insulator 9 to move downwards and linearly to the position shown in fig. 3, and is located at the isolation switch-off position.

In this embodiment, the grounding switch 1 is disposed at the top, which corresponds to an improvement of the isolation grounding switch shown in fig. 5 in the prior art. The upper insulator is a first insulator, the lower insulator is a second insulator, the upper contact is a first contact, and the lower contact is a second contact.

The utility model discloses keep apart earthing switch's embodiment 2:

in this embodiment, the grounding switch is disposed at the lowest position, and the operating insulator is disposed at the highest position, which corresponds to an improvement of the disconnecting switch shown in fig. 6 in the prior art. At this time, the upper insulator is the second insulator, the lower insulator is the first insulator, the upper contact is the second contact, and the lower contact is the first contact. In this embodiment, when the grounding knife is switched on, the grounding knife is in conductive contact with the lower contact.

In other embodiments, the spring fingers may be replaced by other resilient conductive fingers, such as watch band fingers.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.

Claims

1. Isolation earthing switch, its characterized in that: the switch comprises a switch bracket, wherein a first insulator, a second insulator and an operating insulator are arranged on the switch bracket, one end of each of the first insulator and the second insulator is fixed with the switch bracket, and the other end of each of the first insulator and the second insulator is respectively provided with a first contact and a second contact;

2. The isolating grounding switch of claim 1, wherein: the first insulator and the second insulator are obliquely arranged, and the oblique directions of the first insulator and the second insulator are opposite.

3. The isolating grounding switch of claim 2, wherein: the first insulator and the second insulator are arranged up and down, the operating insulator is located below the second insulator, and the grounding knife is located above the first insulator.

4. The isolating grounding switch of claim 1, wherein: the switch support is provided with a slide rail, the operation insulator is assembled on the slide rail in a sliding mode through the insulator support, and the insulator support is provided with a slide block matched with the slide rail.

5. The isolating grounding switch of claim 1, wherein: the conductive rod is a cylindrical copper rod.

6. The isolating grounding switch of claim 5, wherein: the first contact and the second contact are provided with inserting holes for inserting the conductive rods.

7. The isolating grounding switch of claim 6, wherein: and elastic conductive contact fingers are arranged in the insertion holes.

8. The isolating grounding switch of claim 7, wherein: the elastic conductive contact finger is a spring contact finger.