Load switch for 24kV load switch cabinet

Abstract

The utility model discloses a load switch used for a 24kV load switch cabinet, comprising a load switch static contact, a load switch frame, a moving knife assembly and insulators, the moving knife assembly comprises a moving knife holder, and the load switch static contact and the moving knife holder are respectively connected with the load switch frame through the insulators. According to the utility model, the electric field distribution condition around the load switch conductor is improved, so that the partial discharge performance meets the use requirements of specific occasions; and meanwhile, through structure optimization, the production difficulty is reduced, the production cost is reduced, and the insulation performance of the cable meets the requirements of the national / electric power standard.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electrical technical field relates to a kind of load switch for 24kV load switch cabinet. BACKGROUND

[0002] 24kV sulfur hexafluoride gas insulation ring network cabinet is a kind of high-voltage switchgear that all live components are enclosed in gas tank, with the insulation performance of switchgear, the conductivity is not affected by environment and pollution, compact structure, small footprint, maintenance-free features.Load switch as a more typical switch structure, can be combined with active load current or short-circuit current, sulfur hexafluoride gas can be used as arc extinguishing and insulating medium.

[0003] The insulation performance of existing 24kV sulfur hexafluoride gas insulation ring network cabinet under the same insulating medium and rated voltage level is difficult to meet national standards or power standards, or its insulation performance meets national standards or power standards, but its switch volume is large, weight is heavy, structure is more complex, and production cost is higher. SUMMARY

[0004] The utility model discloses in order to overcome at least one prior art's insufficient, provide a kind of load switch for 24kV load switch cabinet.

[0005] In order to realize the above-mentioned purpose, the utility model discloses the following technical scheme: a kind of load switch for 24kV load switch cabinet, load switch static contact, load switch frame, moving knife component and insulator, moving knife component includes moving knife seat, load switch static contact and moving knife seat are connected with load switch frame by insulator respectively.

[0006] Further, the load switch frame includes a load switch frame front plate, a load switch frame rear plate, a grounding beam, a moving knife seat beam, and an upper beam. The grounding beam, the moving knife seat beam, and the upper beam are welded with the load switch frame front plate and the load switch frame rear plate.

[0007] Further, the load switch static contact is fixedly connected with the upper beam through the insulator, and the moving knife seat is fixedly connected with the moving knife seat beam through the insulator.

[0008] Further, the moving knife component further includes a moving knife. The moving knife is provided with a stamping convex, the moving knife seat is provided with a stamping concave, the stamping convex is embedded with the stamping concave, and the moving knife is rotatably connected with the moving knife seat.

[0009] Further, it further includes an arc-extinguishing grid component. The arc-extinguishing grid component includes arc-extinguishing grid pieces and an arc-extinguishing grid frame. The arc-extinguishing grid pieces are parallelly inserted into the arc-extinguishing grid frame, and the arc-extinguishing grid frame is fixed on the load switch static contact through bolts.

[0010] Further, the ground beam, the moving knife base beam and the upper beam are provided as a bending structure.

[0011] Further, the moving knife is provided with a shielding cover.

[0012] Further, the moving knife base and the load switch static contact are provided as a bending copper piece.

[0013] Further, the load switch transmission component, the load switch main shaft and the ground static contact are further included, the load switch main shaft is rotationally connected with the load switch frame, the load switch transmission component is connected with the load switch main shaft, the moving knife is connected with the load switch transmission component, and the moving knife is in contact with the load switch static contact or the ground static contact.

[0014] In conclusion, the utility model has the advantages that:

[0015] 1) the load switch static contact of the utility model is fixedly connected with the upper beam through the insulator, the moving knife base is fixedly connected with the moving knife base beam through the insulator, and the high-voltage potential and the ground potential are isolated through the insulator.

[0016] 2) the ground beam, the moving knife base beam and the upper beam are provided as a bending structure, the strength is guaranteed, the material consumption is reduced, and the weight of the switch is reduced.

[0017] 3) when the moving knife is connected with the moving knife base, the stamping convex of the moving knife is embedded in the stamping concave of the moving knife base, and the lapping effectiveness is guaranteed when the installation plane of the moving knife and the moving knife base has an allowable angular deviation.

[0018] 4) the moving knife base and the load switch static contact are provided as a bending copper piece in the utility model, the moving knife base and the load switch static contact are only formed through bending without using a casting process, the production efficiency is improved, the complexity of the machining process and the manufacturing process is reduced, the manufacturing cost is low, the material consumption is greatly reduced through the optimization of the structure, and the utility model has more competitiveness in the market.

[0019] 5) the utility model improves the electric field distribution around the load switch conductor, the partial discharge performance meets the use requirement of a specific occasion, the production difficulty and the production cost are reduced through the optimization of the structure, the insulation performance meets the requirement of the national / power standard. DRAWINGS

[0020] Fig. 1 It is the load switch axial drawing of the utility model.

[0021] Fig. 2 It is the internal structure schematic view of the load switch of the utility model. DETAILED DESCRIPTION

[0022] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0024] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0025] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of this utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0026] Example 1:

[0027] like Figs. 1-2 As shown, a load switch for a 24kV load switchgear includes a stationary contact 1, a load switch frame 2, a moving knife assembly 3, and an insulator 4. The moving knife assembly 3 includes a moving knife holder 31. The stationary contact 1 and the moving knife holder 31 are respectively connected to the load switch frame 2 through the insulator 4.

[0028] The load switch frame 2 includes a load switch frame front plate 21, a load switch frame rear plate 22, a grounding crossbeam 23, a moving knife seat crossbeam 24, and an upper crossbeam 25. The load switch frame front plate 21 and the load switch frame rear plate 22 are arranged in parallel, and the grounding crossbeam 23, the moving knife seat crossbeam 24, and the upper crossbeam 25 are arranged in parallel. The three are located on the load switch frame front plate 21 and the load switch frame rear plate 22 and are welded to the load switch frame front plate 21 and the load switch frame rear plate 22.

[0029] The grounding crossbeam 23, the moving knife seat crossbeam 24, and the upper crossbeam 25 are all U-shaped bending structures. They are formed by bending, which reduces the amount of material used and lowers the weight of the switch while ensuring sufficient strength.

[0030] The load switch static contact 1 is fixedly connected with the upper cross beam 25 through the insulator 4, the moving knife holder 31 is fixedly connected with the moving knife holder cross beam 24 through the insulator 4, and the high-voltage potential is isolated from the grounding potential through the insulator 4. This ensures the insulation performance of the load switch.

[0031] The moving knife assembly 3 further comprises a moving knife 30, which is rotationally connected with the moving knife holder 31. The fixed end of the moving knife 30 is provided with a stamping convex (not shown in the figure), and the moving knife holder 31 is provided with a stamping concave (not shown in the figure). When the moving knife 30 is connected with the moving knife holder 31, the stamping convex and the stamping concave are embedded, which ensures the effective lap when there is an allowable angular deviation between the installation planes of the moving knife 30 and the moving knife holder 31.

[0032] The free end of the moving knife 30 is provided with a shielding cover 301, which can make the electric field intensity distribution around the load moving knife more uniform.

[0033] In the embodiment, the moving knife holder 31 and the load switch static contact 1 are copper pieces that are bent. The moving knife holder 31 and the load switch static contact 1 are only formed by bending without using a casting process, which improves the production efficiency and reduces the complexity of the machining process and manufacturing process. The manufacturing cost is low, and through the optimization of the structure, the material usage is greatly reduced, which makes it more competitive in the market.

[0034] The load switch further comprises an arc extinguishing grid component 5, which comprises arc extinguishing grid pieces 51 and an arc extinguishing grid frame 52. The arc extinguishing grid pieces 51 are inserted into the arc extinguishing grid frame 52 in parallel at a certain interval, and the arc extinguishing grid frame 52 is fixed on the load switch static contact 1 by bolts.

[0035] There is a certain gap between the bottom plane connecting line of the notch of the arc extinguishing grid piece 51 and the moving track of the moving knife. The arc extinguishing grid component 5 can lead out the electric arc generated during the opening and closing action of the moving knife 30 and accelerate the movement of the electric arc between the gaps of the arc extinguishing grid pieces to achieve the effect of extinguishing the electric arc.

[0036] The load switch further comprises a load switch transmission component 6, a load switch main shaft 7, and a grounding static contact 8. The load switch main shaft 7 is rotationally connected with the load switch frame 2, the load switch transmission component 6 is connected with the load switch main shaft 7, the moving knife 30 is connected with the load switch transmission component 6, and the moving knife 30 is in contact with the load switch static contact 1 or the grounding static contact 8.

[0037] The grounding static contact 8 is fixed on the grounding cross beam 23 by grounding rows.

[0038] The moving knife 30 is connected with the load switch main shaft 7 through the load switch transmission component 6, the load switch main shaft 7 transmits the movement to the moving knife 30 through the load switch transmission component 6, the moving knife 30 changes the grounding, isolation or closing position, and then realizes the grounding, opening and closing state of the load switch 2.

[0039] The axis direction of the load switch main shaft 7 is parallel with the length direction of the moving knife seat crossbeam 24, the output end of the load switch main shaft 7 is rotationally connected with the load switch frame front plate 21, the input end of the load switch main shaft 7 penetrates through the load switch frame front plate 21 and is dynamically sealedly connected with the load switch frame front plate 21, the input end of the load switch main shaft 7 is fixedly arranged with the cam disc 9, the load switch 2 is linked with the three-position operating mechanism through the cam disc 9, the linkage structure and mechanism adopt the prior art, and details are not described herein.

[0040] The load switch transmission component 6 in the embodiment adopts the insulating material and the prior structure, and details are not described herein.

[0041] The load switch in the embodiment can be independently used in the prior equipment, and the unmentioned structure of the load switch adopts the prior component, and details are not described herein.

[0042] Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the utility model.

Claims

1. A load switch for a 24 kV load switchgear, characterized in that: The load switch static contact, the load switch frame, the moving knife assembly and the insulator are included.

2. A load switch as claimed in claim 1 for a 24 kV load switchgear, characterized in that: The load switch frame includes a load switch frame front plate, a load switch frame back plate, a grounding crossbeam, a moving knife seat crossbeam and an upper crossbeam.

3. A load switch as claimed in claim 2, characterized in that: The load switch static contact is fixedly connected with the upper crossbeam through the insulator, and the moving knife seat is fixedly connected with the moving knife seat crossbeam through the insulator.

4. A load switch as claimed in claim 1, for a 24 kV load switchgear, characterized in that: The moving knife assembly further includes a moving knife, the moving knife is provided with a stamping convex, the moving knife seat is provided with a stamping concave, the stamping convex is embedded with the stamping concave, and the moving knife is rotationally connected with the moving knife seat.

5. A load switch as claimed in claim 1, for a 24 kV load switchgear, characterized in that: The arc extinguishing grid component includes arc extinguishing grid pieces and an arc extinguishing grid frame, the arc extinguishing grid pieces are parallelly inserted into the arc extinguishing grid frame, and the arc extinguishing grid frame is fixed on the load switch static contact through bolts.

6. A load switch as claimed in claim 2, wherein: The grounding crossbeam, the moving knife seat crossbeam and the upper crossbeam are provided in a bent structure.

7. A load switch as claimed in claim 4, characterized in that: The moving knife is provided with a shielding cover.

8. A load switch as claimed in claim 1, for a 24 kV load switchgear, characterized in that: The moving knife seat and the load switch static contact are provided in a bent copper piece.

9. A load switch as claimed in claim 4, characterized in that: The load switch transmission component, the load switch main shaft and the grounding static contact are further included, the load switch main shaft is rotationally connected with the load switch frame, the load switch transmission component is connected with the load switch main shaft, the moving knife is connected with the load switch transmission component, and the moving knife is in contact with the load switch static contact or the grounding static contact.

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