CN202473732U - Miniaturized three-phase high-pressure vacuum load switch - Google Patents

Abstract

The utility model provides a miniaturized three-phase high-voltage vacuum load switch, which includes a three-phase body, an isolation shaft transmission part, a load switch shaft transmission part, a grounding switch shaft transmission part, an installation chassis, an operating mechanism, an interlocking mechanism and Trip shaft assembly; the three-phase bodies are arranged side by side longitudinally, and any phase body includes an isolation contact arm unit, an insulating cover unit, and a fuse unit from top to bottom, wherein: both sides of the isolation contact arm unit of any phase body are A first insulating isolation plate is arranged longitudinally, and the height and width of the first insulating isolation plate are not less than the height and width of all charged bodies in the isolated contact arm unit; There is a second insulating isolation plate, the height and width of which are not less than the height and width of all charged bodies in the fuse unit. The utility model shortens the air insulation distance between phases to realize miniaturization.

Description

Miniaturized three-phase high-voltage vacuum load switch

【Technical field】

The utility model relates to a three-phase high-voltage vacuum load switch.

【Background technique】

The high-voltage vacuum load switch belongs to the category of medium-voltage power distribution products in the field of electric power technology, and it can be divided into high-voltage vacuum load switches and high-voltage vacuum fuse combination appliances. Among them, the vacuum interrupter and high-voltage fuse are the main arc-extinguishing components. The high-voltage switch composed of only the vacuum interrupter is called a high-voltage vacuum load switch, and the high-voltage vacuum switch composed of a vacuum interrupter and a high-voltage fuse is called a high-voltage vacuum fuse. Combination appliances.

Composite insulation technology is generally used in current high-voltage vacuum load switches. Composite insulation technology means that the insulation between phases and phases is borne by air + solid insulators. The optimized design of the insulation structure and the selection and reasonableness of high-quality insulation media are adopted. The use can realize the purpose of reducing the air insulation distance and miniaturizing the switchgear. The main means are: conductor coating insulation layer + air, coating insulation layer + air, partition insulation + air combination insulation method. However, the use of composite insulation in the existing high-voltage vacuum load switch products on the market only reduces the air insulation distance between the phases, but does not reduce the insulation air distance between phases. Therefore, the volume of the high-voltage vacuum load switch products currently on the market is very small. Larger, such as 10KV high-voltage vacuum load switch, the phase spacing must reach at least 210mm.

As disclosed on 2005-06-01, the Chinese utility model patent with the publication number of 2703318 discloses a small vacuum load switch-combined electrical appliance, including a vacuum interrupter, a high-voltage fuse, isolation components and connectors; The chamber and the high-voltage fuse are arranged side by side, and the vacuum interrupter and the high-voltage fuse are separated by an insulating cover, which changes the way the two are arranged up and down in the traditional structure, making the structure compact and reducing the volume. The utility model is installed in the ring network cabinet, which can reduce the volume of the vacuum ring network cabinet to 1650mm in height, 500mm in width and 1000mm in thickness, which is the same volume as the SF6 ring network cabinet; realize the miniaturization of the vacuum ring network cabinet; the utility model The miniaturization is only achieved by adjusting the arrangement between the vacuum interrupter and the high-voltage fuse, and the insulating air distance between the phases is not reduced.

【Content of invention】

The technical problem to be solved by the utility model is to provide a three-phase high-voltage vacuum load switch, which reduces the air insulation distance between phases and realizes miniaturization.

The utility model is realized as follows: a miniaturized three-phase high-voltage vacuum load switch, including a three-phase body, an isolation shaft transmission part, a load switch shaft transmission part, a grounding switch shaft transmission part, an installation chassis, an operating mechanism, a coupling Lock mechanism and tripping shaft assembly; the three-phase bodies are arranged side by side longitudinally, and any phase body includes an isolation contact arm unit, an insulating cover unit, and a fuse unit from top to bottom, and it is characterized in that: the isolation contact of any phase body Both sides of the arm unit are longitudinally provided with a first insulating isolation plate, the height and width of which are not less than the height and width of all charged bodies in the isolated contact arm unit; and the fuse unit of any phase body Both sides are longitudinally provided with second insulating and separating plates, and the height and width of the second insulating and separating plates are not less than the height and width of all charged bodies in the fuse unit.

Wherein, the surface of the first insulating isolation plate is provided with an insertion strip, and the outer surface of the insulation cover of the insulating cover unit is provided with a slot, and the first insulating isolation plate is inserted into the slot through the insertion strip for connection. fixed.

The top of the fuse unit of any phase body is also provided with an insulating and isolating horizontal plate, and the back is also provided with an insulating and isolating back plate longitudinally. An enclosing structure, the fuse unit is arranged in the semi-enclosing structure.

Wherein, screw holes for fixing the semi-enclosed structure are provided on the insulating backplane.

Wherein, the number of the first insulation isolation plate or the second insulation isolation plate between two adjacent phase bodies is 1 or 2 pieces.

Wherein, the surface of the charged body in any phase body is also covered with an insulating layer or coated with an insulating coating.

The utility model has the advantages that first insulating isolation plates are longitudinally arranged on both sides of the isolation contact arm unit of any phase body, and second insulating isolation plates are longitudinally arranged on both sides of the fuse unit of any phase body, To insulate and isolate the charged bodies of adjacent two-phase bodies, so that the isolation is more reliable, instead of the existing common composite insulation method consisting only of cladding insulation + air insulation, so that the distance between phases can be effectively reduced, and three-phase high-voltage vacuum can be realized Miniaturization of load switches.

【Description of drawings】

The utility model will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is a three-dimensional structural schematic diagram of a miniaturized three-phase high-voltage vacuum load switch of the present invention.

Fig. 2 is a schematic diagram of the front structure of the miniaturized three-phase high-voltage vacuum load switch of the present invention.

Fig. 3 is a schematic diagram of the side structure of the miniaturized three-phase high-voltage vacuum load switch of the present invention.

Fig. 4 is a schematic diagram of the internal structure of the isolation contact arm unit of the present invention.

Fig. 5 is a schematic diagram of the internal structure of the fuse unit of the present invention.

Fig. 6 is a schematic diagram of the fixing structure of the first insulating spacer and the insulating cover unit of the present invention.

Fig. 7 is a schematic front view of the semi-enclosed structure in the miniaturized three-phase high-voltage vacuum load switch of the present invention.

【Detailed ways】

Please refer to Figures 1 to 6, the miniaturized three-phase high-voltage vacuum load switch of the present invention includes a three-phase body 1, an isolation shaft transmission part 2, a load switch shaft transmission part 3, a grounding switch shaft transmission part 4, Install the chassis 5, the operating mechanism 6, the interlock mechanism 7 and the trip shaft assembly 8; the three-phase bodies 1 are arranged side by side in the longitudinal direction, and any phase body 1 includes an isolation contact arm unit 11 and an insulating cover unit 12 from top to bottom , Fuse unit 13.

Focusing on Fig. 4, the existing three-phase high-voltage vacuum load switch isolation contact arm unit 11 generally includes an incoming line terminal 111, an isolation static contact 112, an isolation movable contact arm 113, a contact finger 114, a contact finger spring 115, and a contact seat 116 And the connection row 117, wherein the incoming line terminal 111, the isolated static contact 112, the contact finger 114, the contact finger spring 115, the contact seat 116 and the connection row 117 are electrified bodies, the isolated movable contact arm 113 is an insulator, and the isolated static contact 112 and the incoming line terminal 111 are generally designed in one piece, and the isolation movable contact arm 113, contact finger 114, contact finger spring 115, contact seat 116 and connection 117 are connected in sequence, and the contact finger is connected in sequence when the three-phase high-voltage vacuum load switch is closed. 114 is connected and conducted with the isolated static contact 112.

The fuse unit 13 generally includes a high-voltage fuse 131, a fuse holder 132, and an outlet terminal 133. The fuse holder 132 is provided with an upper fuse card holder 134 and a lower fuse card holder 135, and the high-voltage fuse 131 is fixed. On the fuse holder 132, the upper end of the high-voltage fuse 131 is connected with the insulating cover unit 12 through the upper fuse card holder 134, and the lower end is connected with the outlet terminal 133 through the lower fuse card holder 135, wherein the high-voltage fuse 131, the upper The fuse card holder 134, the lower fuse card holder 135, and the outlet terminal 133 are all electrified bodies.

Both sides of the isolation contact arm unit 11 of any phase body 1 are longitudinally provided with a first insulating isolation plate 118, and the height and width of the first insulating isolation plate 118 are not less than the height of all charged bodies in the isolation contact arm unit 11. and width; wherein, the surface of the first insulation isolation plate 118 is provided with an insertion strip 1182, and the outer surface of the insulation cover 121 of the insulation cover unit 12 is provided with a slot 1212, and the first insulation isolation plate 118 passes through the The insertion strip 1182 is inserted into the slot 1212 for connection and fixation.

Both sides of the fuse unit 13 of any phase body 1 are longitudinally provided with a second insulation and isolation plate 136, and the height and width of the second insulation and isolation plate 136 are not less than the height and width of all charged bodies in the fuse unit 13, respectively. . Wherein, the top of the fuse unit 13 of any phase body 1 is also provided with an insulating and isolating horizontal plate 137, and the back is also provided with an insulating and isolating back plate 138 longitudinally. The three insulating plates 136 are connected to form a semi-enclosed structure, and the fuse unit 13 is disposed in the semi-enclosed structure. The insulating isolation backplane 138 is provided with screw holes 1382 for fixing the semi-surrounding structure.

In terms of quantity setting, the number of the first insulating and separating plates 118 or the second insulating and isolating plates 136 between adjacent two-phase bodies 1 can be 1 piece or 2 pieces.

The utility model can also be combined with composite insulation technology, that is, the surface of the charged body in any phase body 1 is also covered with an insulating layer or coated with an insulating coating, so that the insulation effect is better.

The utility model has the advantages that first insulating isolation plates are longitudinally arranged on both sides of the isolation contact arm unit of any phase body, and second insulating isolation plates are longitudinally arranged on both sides of the fuse unit of any phase body, To insulate and isolate the charged bodies of adjacent two-phase bodies, so that the isolation is more reliable, instead of the existing common composite insulation method consisting only of cladding insulation + air insulation, so that the distance between phases can be effectively reduced, and three-phase high-voltage vacuum can be realized Miniaturization of load switches.

Although the specific embodiments of the present utility model have been described above, those skilled in the art should understand that the specific embodiments we describe are only illustrative, rather than used to limit the scope of the present utility model. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present utility model shall fall within the protection scope of the claims of the present utility model.

Claims (6)

1. the three-phase high-voltage vacuum load switch of a miniaturization comprises the three-phase body, isolates through-drive parts, on-load switch through-drive parts, earthed switch through-drive parts, underframe, operating mechanism, interlocking device and trip shaft assembly are installed; Said three-phase body vertically is arranged side by side; Arbitrary phase body comprises from top to bottom isolates contact arm unit, insulating cover unit, fuse unit; It is characterized in that: the both sides, isolation contact arm unit of arbitrary phase body all vertically are provided with the first insulation division board, and the height and the width of this first insulation division board are not less than the height and the width of isolating all electrified bodies in the contact arm unit respectively; And the fuse unit both sides of arbitrary phase body all vertically are provided with the second insulation division board, the height of this second insulation division board and height and the width that width is not less than all electrified bodies in the fuse unit respectively.

2. the three-phase high-voltage vacuum load switch of miniaturization as claimed in claim 1; It is characterized in that: the surface of the said first insulation division board is provided with cutting; The outer surface of the insulating cover of said insulating cover unit is provided with slot, and the said first insulation division board inserts to connect in this slot through said cutting and fixes.

3. the three-phase high-voltage vacuum load switch of miniaturization as claimed in claim 1; It is characterized in that: the top of the fuse unit of said arbitrary phase body also is provided with insulation and isolates transverse slat; The back also vertically is provided with insulation and isolates backboard; Transverse slat is isolated in this insulation, insulation is isolated backboard and all is connected to form the semi-surrounding structure with the second insulation division board, and said fuse unit is located in the middle of this semi-surrounding structure.

4. the three-phase high-voltage vacuum load switch of miniaturization as claimed in claim 3 is characterized in that: said insulation is isolated backboard and is provided with the bolt apertures that is used for fixing said semi-surrounding structure.

5. the three-phase high-voltage vacuum load switch of miniaturization as claimed in claim 1 is characterized in that: the said first insulation division board between the adjacent two phase bodies or the quantity of the second insulation division board are 1 or 2.

6. the three-phase high-voltage vacuum load switch of miniaturization as claimed in claim 1 is characterized in that: the surface of the electrified body in said arbitrary phase body is gone back the coated insulation layer or is applied insulating coating.

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