CN108493827A - High-pressure inflation type switch cabinet bus switching device - Google Patents

Abstract

The invention discloses a kind of high-pressure inflation type switch cabinet bus switching device, structure includes connecting sleeve, T-type insulating sleeve, stud, insulation closure；Wherein the cavity of T-type insulating sleeve inside left is connected with connecting sleeve, and the cavity of T-type insulating sleeve inner right side is blocked with insulation to be connected, and connecting sleeve connects insulation by stud and blocks.Advantages of the present invention：1）Directly with connecting sleeve, T-type insulating sleeve, insulate to block is assembled into one rectangular copper bus-bar, eliminates processing trouble of the complete cabinet in busbar switches through, simplifies linkage editor, facilitate gas-filling cabinet and metering cabinet, the bus adaption of high-tension boost cabinet；2）It is transferred using rectangular copper bus-bar, contact is reliable；3）It is directly transferred using rectangular copper bus-bar, is transferred with cable, copper pipe processing switching is compared, and making processing and material cost are significantly reduced.

Description

High-voltage inflatable switchgear bus transfer device

technical field

The invention relates to a high-voltage inflatable switchgear bus transfer device, which is suitable for the connection and transfer between the outlet end of the high-voltage inflatable switchgear gas box, the metering cabinet, and the high-voltage lifting cabinet, and belongs to the high-voltage power distribution cabinet. The field of design and manufacture of special-purpose devices.

Background technique

There are generally two structural forms for the inlet and outlet terminals of the gas box outlet of the high-voltage inflatable switchgear at home and abroad, the metering cabinet, and the high-voltage lifting cabinet: one is through a two-way transition joint and an insulating sleeve. As the external cable connection of the busbar, the other is to connect with the external copper pipe as the busbar through a two-way transition joint and an insulating sleeve. In the first form, when installing and wiring a complete set of cabinets, the bus bars at both ends of the three-phase cables must be stripped, and then the cable lugs must be fitted, and then connected to both ends of the incoming and outgoing lines by fastening bolts. Due to the limited volume of the air box of the high-voltage inflatable switchgear, the phase-to-phase distance between the terminals of the three-phase lead wires is less than the distance required for air insulation, so the terminals must be insulated with a withstand voltage of 80kV. This wiring method has complicated procedures, and if the press-fitted cable lug is not firm, partial discharge will also occur due to unreliable contact. Another structural form is to connect the external copper pipe of the jacket insulation layer that meets the corresponding current carrying capacity requirements through a two-way transition joint plus an insulating sleeve. The two ends of the external copper pipe are required to be punched flat and punched for installation holes. Since the connection of the copper pipe is a rigid connection, when connecting to the external busbar, due to the requirement of the phase spacing, the two phases A and C need to be rotated to increase the phase spacing. When connecting to the external rectangular busbar, the copper pipe needs to be bent at a certain angle. The pipe is extremely difficult and brings great inconvenience to the construction. The structural forms of the above two kinds of bus transfers all have the defect of high cost.

Contents of the invention

The present invention proposes a high-voltage inflatable switchgear bus transfer device, and its purpose is to solve the technical problem of bus transfer between the outlet end of the high-voltage inflatable switchgear gas box and the metering cabinet and high-voltage lifting cabinet in the prior art , To overcome the defects of complex processing, inconvenient wiring and high cost of the original structure, a rectangular copper busbar is used as a lead-out wire in a T-shaped insulating sleeve at the outlet end of the adapter device. The structure simplifies the processing procedure, improves the reliability of wiring, and reduces processing and material costs.

The technical solution of the present invention is a high-voltage inflatable switchgear bus transfer device, the structure of which includes: connecting bushings, T-shaped insulating bushings, rectangular copper busbars, insulating plugs, and stud bolts for press-fitting rectangular copper busbars.

A conductive rod is pressed into the connecting sleeve. One end of the conductive rod is provided with a connecting end connected with a two-way transition joint, and the other end is provided with a nut hole matching with a stud bolt. The two-way transition connector matches the tapered inner cavity, and the connecting sleeve has three stepped shapes. The large stepped shape is the installation base, and the four corners of the base are respectively provided with installation holes connected to the cabinet. The shape of the cone is the same as that of T Match the tapered inner cavity of the type insulating bushing. The connecting sleeve is pressed by epoxy resin, and the interlayer is equipped with a metal shielding layer to prevent partial discharge; the T-shaped insulating sleeve is pressed and formed by elastic insulating material. The T-shaped insulating sleeve is set on the cone and the stepped shape of the connecting sleeve. The rectangular copper busbar is set in the rectangular square groove of the T-shaped insulating bushing. One end is connected to the end face of the conductive rod of the connecting bushing, and the other end is exposed outside the rectangular square groove of the T-shaped insulating bushing. It can be bent at any angle and pass through the installation hole. Connected to the external busbar. The rectangular copper bus bar is tightly pressed by stud bolts to ensure reliable connection of the contact surface of the outlet end.

On the other side of the T-shaped insulating sleeve, there is an insulating plug with a tapered shape. The tapered shape matches the tapered inner cavity of the T-shaped insulating sleeve. The insulating plug is provided with a nut hole that matches the stud bolt. One end is provided with an inner corner hole to facilitate the tight pressing of the insulation plug.

The high-voltage inflatable switchgear bus transfer device is connected to the outlet terminal embedded in the gas box of the high-voltage inflatable switchgear through a two-way transition joint, so as to achieve the purpose of transferring the outgoing lines of the high-voltage inflatable switchgear.

Advantages of the present invention:

1) The rectangular copper bus bar is directly assembled with the connecting bushing, T-shaped insulating bushing, and insulation plugging, which eliminates the trouble of processing the complete cabinet in the connection and transfer of the bus bar, simplifies the assembly procedure, and facilitates the inflatable cabinet and metering cabinet. Bus transfer of high-voltage riser cabinet;

2) Rectangular copper busbar is used for connection, and the contact is reliable;

3) Using rectangular copper busbars for direct transfer, compared with cable transfer and copper tube processing transfer, greatly reduces the cost of manufacturing, processing and materials.

Description of drawings

Figure 1 is a schematic cross-sectional view of the structure of the high-voltage inflatable switchgear bus transfer device.

Fig. 2 is a schematic diagram of the connection sleeve structure.

Fig. 3 is a schematic diagram of the structure of a T-shaped insulating bushing.

Fig. 4 is an assembly drawing of the high-voltage inflatable switchgear bus transfer device.

In the figure, 1 is the connection sleeve, 2 is the T-shaped insulating sleeve, 3 is the stud bolt, 4 is the insulation plug, 5 is the rectangular square groove, 6 is the rectangular copper busbar, 7 is the metal shielding layer, and 8 is the connection end Head, 9 is a two-way transition joint, 10 is a mounting hole, and 11 is a bushing at the outlet end of the switchgear gas box.

Detailed ways

The technical solution of the present invention will be further described below according to the accompanying drawings.

As shown in Figure 1, the structure of the high-voltage inflatable switchgear busbar transfer device includes a connecting sleeve 1, a T-shaped insulating sleeve 2, a stud bolt 3, and an insulating plug 4; the inside of the T-shaped insulating sleeve 2 is left The cavity on the side is connected with the connecting sleeve 1, the cavity on the right side of the T-shaped insulating sleeve 2 is connected with the insulating plug 4, and the connecting sleeve 1 is connected with the insulating plug 4 through the stud bolt 3.

As shown in Figure 2, the connecting sleeve 1 is processed and pressed by epoxy resin, and a conductive rod is pressed inside it. One end of the conductive rod is provided with a connecting terminal 8 connected with a two-way transition joint, and the other end of the conductive rod is One end is provided with a nut hole matching the stud bolt 3; a metal shielding layer 7 is buried inside the outer wall of the cavity on the left side of the connecting sleeve 1; the outer surface on the left side of the connecting sleeve is provided with 3 stepped shapes, the largest of which is The shape is an installation base, and the four corners of the installation base are respectively provided with an installation hole 10, and the installation holes 10 and the switch cabinet wall are connected and fixed by bolts.

As shown in Figure 3, the T-shaped insulating sleeve 2 is made of elastic insulating material, such as silicon rubber, and its lower end is provided with a rectangular square groove 5, and the rectangular copper busbar 6 is set in the rectangular square groove 5. One end of the copper busbar 6 is provided with a through hole, and is connected with the end face of the connecting sleeve 1 conductive rod, and the other end is exposed outside the rectangular square groove 5, can be bent at any angle, and is connected with the external busbar through two mounting holes.

The insulating plug 4 has a tapered shape that matches the tapered inner cavity of the T-shaped insulating sleeve. The insulating plug is provided with a nut hole matching the stud bolt 3, and the other end is provided with a square inner corner hole to facilitate the insulation. Blocking 4 is pressed tightly.

As shown in Figure 4, when assembling, apply grease to the connecting sleeve 1, closely fit and connect with the cavity on the left side of the T-shaped insulating sleeve 2, and connect the rectangular copper bus bar 6 to the connecting sleeve 1 through the stud bolt 3 The end faces of the rods are compressed and connected, and an insulating plug 4 is installed inside the cavity on the right side of the T-shaped insulating sleeve 2, and the insulating plug 4 compresses and fixes the T-shaped insulating sleeve 2 and the connecting sleeve 1 as a whole. At the same time, through the copper pipe inside the two-way transition joint 9, the outlet end of the outlet casing 11 of the gas box of the switchgear and the connection terminal 8 inside the connection sleeve 1 are connected to each other. The four mounting holes 10 on the base of the connecting sleeve 1 are connected and fixed with the switch cabinet wall by bolts.

Claims (6)

1. high-pressure inflation type switch cabinet bus switching device, it is characterized in that including connecting sleeve（1）, T-type insulating sleeve（2）, it is double Hook bolt（3）, insulation block（4）；Wherein T-type insulating sleeve（2）The cavity and connecting sleeve of inside left（1）It is connected, T Type insulating sleeve（2）The cavity of inner right side is blocked with insulation（4）It is connected, connecting sleeve（1）Pass through stud（3）Even Insulation is connect to block（4）.

2. high-pressure inflation type switch cabinet bus switching device according to claim 1, it is characterized in that the connecting sleeve （1）It is processed and is suppressed using epoxy resin, connecting sleeve（1）Inside be pressed with conducting rod, one end of conducting rod is equipped with connecting pin Head（8）, the other end of conducting rod is equipped with and stud（3）The nut bore of matching.

3. high-pressure inflation type switch cabinet bus switching device according to claim 1, it is characterized in that the connecting sleeve （1）The outer pars intramuralis of left side cavity is embedded with metal screen layer（7）, connecting sleeve（1）Left end be equipped with mounting seat, install bottom The quadrangle of seat is respectively equipped with 1 mounting hole（10）.

4. high-pressure inflation type switch cabinet bus switching device according to claim 1, it is characterized in that the T-type insulation sleeve Pipe（2）Using elastic insulating material compression moulding, T-type insulating sleeve（2）Lower end be equipped with rectangle square groove（5）, rectangle square groove（5） Inside it is set with rectangular copper bus-bar（6）, rectangular copper bus-bar（6）One end and connecting sleeve（1）The end face of conducting rod connects, other end dew Go out rectangle square groove（5）Outside, and equipped with 2 mounting holes it is connected with external busbar.

5. high-pressure inflation type switch cabinet bus switching device according to claim 1, it is characterized in that the insulation blocks （4）One end be equipped with and stud（3）The nut bore of matching, the other end are equipped with rectangular interior corner apertures.

6. high-pressure inflation type switch cabinet bus switching device as described in claim 1, it is characterised in that：When assembly, it will connect Casing（1）Lubricating grease is smeared, with T-type insulating sleeve（2）The cavity in left side is closely connected, and passes through stud（3）By square Shape copper busbar（6）With connecting sleeve（1）The end face of conducting rod, which compresses, to connect, and in T-type insulating sleeve（2）The cavity inside on right side Installation insulation blocks（4）, insulation closure（4）Pass through the nut bore and stud of bottom（3）Connection, by T-type insulating sleeve（2） With connecting sleeve（1）Entirety is fixed；Pass through two-way transit joint（9）Internal copper pipe, by switch cabinet air box outlet end cap Pipe（1）1 leading-out terminal and connecting sleeve（1）Internal connection end（8）It interconnects, connecting sleeve（1）4 peaces on pedestal Fill hole（10）It is connected and fixed by bolt and switch cabinet wall.