A mine explosion-proof PT cabinet voltage transformer assembly

Abstract

The present invention relates to a voltage transformer assembly for a mining explosion-proof PT cabinet, comprising a base, on which a three-phase voltage transformer and a single-phase voltage transformer are supported. The output of the three-phase voltage transformer is connected to the input of the single-phase voltage transformer, and the output of the single-phase voltage transformer is connected to an output connector via multiple circuit breakers. The base is also provided with multiple horizontally rearward-facing insulating terminals, the rear ends of three of the multiple insulating terminals being respectively connected to the upper ends of three copper bars, which are respectively horizontally connected to three conductive rods facing rearward, and the lower ends of the three copper bars facing forward are respectively connected to three high-voltage current-limiting fuses of the three-phase voltage transformer. An insulating crimping partition is provided behind the three copper bars, which passes through the conductive rods and is screwed to the rear ends of the other insulating terminals, thereby compressing the three copper bars. The structure is simple and can effectively balance the stable installation of the conductive rods and the explosion-proof connection between them.

Description

Technical Field

[0001] The invention relates to a mutual inductor, in particular to a voltage mutual inductor component of a mine explosion-proof PT cabinet. Background Art

[0002] When working underground in a mine, high explosion-proof requirements are placed on electrical equipment, especially switch boxes. The high explosion-proof requirements not only require explosion-proofing of the external box structure, but also place high explosion-proof requirements on its internal voltage transmission and transformers. At the same time, convenient loading and unloading is also required. The transformer is usually installed in the switch box by sliding on a pulley, and the transformer voltage is connected horizontally from the rear end. It is particularly important to connect the fuses of the transformer to the explosion-proof between the conductive rods. Summary of the Invention

[0003] The present invention provides a mining explosion-proof PT cabinet voltage transformer assembly with a simple structure, which can better take into account the stable installation of conductive rods and the mutual explosion-proof connection.

[0004] The technical solution adopted by the present invention is: a mine explosion-proof PT cabinet voltage transformer assembly, including a base, on which a three-phase voltage transformer and a single-phase voltage transformer are supported and arranged, the output of the three-phase voltage transformer is connected to the input of the single-phase voltage transformer, and the output of the single-phase voltage transformer is connected to an output connector through multiple circuit breakers. The characteristic is that: the base is also provided with multiple horizontally rearward-facing insulating terminals, the rear ends of three of the multiple insulating terminals are respectively connected to the upper ends of three copper bars, the three copper bars are respectively horizontally connected to three conductive rods facing rearward, and the lower ends of the three copper bars are respectively connected to three high-voltage current-limiting fuses of the three-phase voltage transformer facing forward, an insulating crimping partition is provided on the rear side of the three copper bars, the insulating crimping partition passes through the conductive rod and is locked by screws to be connected to the rear ends of other insulating terminals to compress the three copper bars.

[0005] Furthermore, the three-phase voltage transformer is arranged on the lower shelf of the base, and the single-phase voltage transformer is arranged on the upper shelf of the base.

[0006] Furthermore, three upper conductive insulating cover structures are provided on the upper portion of the insulating crimping partition towards the rear, and the upper portion corresponds to the conductive rods.

[0007] Furthermore, three lower conductive insulating cover structures are provided at the rear of the lower portion of the insulating crimping partition, which respectively correspond to the covered high-voltage current-limiting fuses.

[0008] Furthermore, a pulley that can slide in the switch box is provided at the bottom of the base.

[0009] Furthermore, a hook is provided at the rear of the base for engaging with the switch box.

[0010] The present invention adopts multiple insulating terminals arranged at the rear of the base to support and lock the copper busbar and the insulating crimping partition. The copper busbar is horizontally connected to the conductive rod and the high-voltage current-limiting fuse of the three-phase voltage transformer. The conductive rod and the high-voltage current-limiting fuse are separated by the insulating crimping partition. It can ensure the explosion-proof connection of the conductive rod to the three-phase voltage transformer while taking into account the stability and firmness of the overall assembly, and has excellent explosion-proof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention.

[0012] In the figure: base 1, pulley 2, lower frame 3, three-phase voltage transformer 4, high-voltage current-limiting fuse 41, upper frame 5, single-phase voltage transformer 6, side frame 7, upper insulating terminal 8, lower insulating terminal 9, copper busbar 10, insulating crimping partition 11, upper conductive insulating cover structure 12, lower conductive insulating cover structure 13, conductive rod 14, hook 15. DETAILED DESCRIPTION

[0013] The following is further described with reference to the accompanying drawings and embodiments.

[0014] Figure 1 As shown: A voltage transformer assembly for a mining explosion-proof PT cabinet, comprising a base 1, a lower frame 3, a three-phase voltage transformer 4, a high-voltage current-limiting fuse 41, an upper frame 5, a single-phase voltage transformer 6, a side frame 7, an upper insulating terminal 8, a lower insulating terminal 9, a copper busbar 10, an insulating crimping partition 11, and a conductive rod 14. The base supports the three-phase voltage transformer 4 and the single-phase voltage transformer 6 via the lower frame 3 and the upper frame 5, respectively. The output of the three-phase voltage transformer is connected to the input of the single-phase voltage transformer, and the output of the single-phase voltage transformer is connected to the output connector via multiple circuit breakers (this output structure is prior art, and the attachment does not show the installation position in detail; the installation position can be set on the base according to wiring requirements). A side frame 7 is provided on the rear side of the base 1. Three upper insulating terminals 8 facing horizontally backward and two or more lower insulating terminals 9 facing horizontally backward are provided on the side frame 7. The rear ends of the three upper insulating terminals 8 are respectively connected to three copper busbars 10. At the upper end, three copper bars 10 are horizontally connected to three conductive rods 14 respectively toward the rear, and the lower ends of the three copper bars are connected to the three high-voltage current-limiting fuses 41 of the three-phase voltage transformer 4 toward the front. An insulating crimping partition 11 is set on the rear side of the three copper bars. The upper part of the insulating crimping partition is provided with three upper conductive insulating cover structures 12 corresponding to the conductive rods, and the lower part of the insulating crimping partition is provided with three lower conductive insulating cover structures 13 corresponding to the covered high-voltage current-limiting fuses. The insulating crimping partition 11 passes through the conductive rods and is screwed to the rear end of the lower insulating terminal 9 to compress the three copper bars.

[0015] In order to further improve the convenience of installation, a pulley 2 that can slide in the switch box is provided at the bottom of the base; in order to further improve the installation stability, a hook 15 that can be buckled with the switch box can be provided at the rear of the base.

Claims

1. A mining explosion-proof PT cabinet voltage transformer assembly, comprising a base, on which a three-phase voltage transformer and a single-phase voltage transformer are supported. The output of the three-phase voltage transformer is connected to the input of the single-phase voltage transformer, and the output of the single-phase voltage transformer is connected to an output connector via multiple circuit breakers. The assembly is characterized in that: The base is also provided with a plurality of insulating terminals facing horizontally backwards, the rear ends of three of the plurality of insulating terminals are respectively connected to the upper ends of the three copper bars, the three copper bars are respectively connected to the three conductive rods horizontally backwards, and the lower ends of the three copper bars are respectively connected to the three high-voltage current-limiting fuses of the three-phase voltage transformer forwards. An insulating crimping partition is provided on the rear side of the three copper bars, the insulating crimping partition passes through the conductive rods and is screwed to connect to the rear ends of the other insulating terminals to compress the three copper bars.

2. The mining explosion-proof PT cabinet voltage transformer assembly according to claim 1, characterized in that: The three-phase voltage transformer is arranged on the lower shelf of the base, and the single-phase voltage transformer is arranged on the upper shelf of the base.

3. The mining explosion-proof PT cabinet voltage transformer assembly according to claim 1, characterized in that: The upper portion of the insulating crimping partition is provided with three upper conductive insulating cover structures facing backwards, which are respectively connected to the conductive rods.

4. The mining explosion-proof PT cabinet voltage transformer assembly according to claim 1, characterized in that: The lower part of the insulating crimping partition is provided with three lower conductive insulating cover structures respectively corresponding to the cover-mounted high-voltage current-limiting fuses.

5. The mining explosion-proof PT cabinet voltage transformer assembly according to claim 1, characterized in that: The bottom of the base is provided with a pulley which can slide in the switch box.

6. The mining explosion-proof PT cabinet voltage transformer assembly according to claim 1, characterized in that: The rear part of the base is provided with a hook which is buckled with the inside of the switch box.

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