CN105449571A - Switch cabinet bus grounding device - Google Patents

Abstract

The invention discloses a switch cabinet bus grounding device, and the device comprises a pedestal with universal wheels, and a support disposed on the pedestal. The upper end of the support is provided with a cross arm, and the cross arm is provided with a clamping tool with the adjustable position. The clamping tool enables a grounding exploring tube to be fixed on the cross arm, and the grounding exploring tube is an insulating rod. The front end of the grounding exploring tube is provided with a probe, and a ground line passes through the interior of the grounding exploring tube to be connected with the probe. When the device is in use, the position of the cross arm and the position of the clamping tool for fixing the grounding exploring tube are arranged according to the positions of three-phase static contacts of different types of switch cabinets. The pedestal with the support is pushed into a handcart room of the switch cabinet, and a valve is opened. After the result that there is no voltage is determined through electricity verification, the pedestal with the support does not need to be moved out. The grounding exploring tube is quickly installed on the cross arm, and a quincuncial-type contact is reliably connected with the static contact, thereby guaranteeing the grounding reliability.

Description

Switch cabinet busbar grounding device

technical field

The invention relates to an electric device, in particular to a grounding device for a bus bar of a switch cabinet.

Background technique

With the continuous development of the power grid, a large number of fully enclosed switchgears with compact structure, small footprint, high explosion-proof level and safe operation have been adopted for 35KV and below equipment. When the switchgear is overhauled, it often involves the overhaul of the busbar. At this time, the busbar needs to be reliably grounded. However, most of the 10kV switchgear equipment put into operation before 2000 is not equipped with an in-cabinet busbar grounding device. At present, when the 10kV switchgear without bus grounding device is used for bus grounding safety measures, the grounding method of "directly connecting the grounding wire to the bus PT and the static contact in the handcart compartment of the lightning arrester" is often used. This grounding method operates Inconvenient, there is a great security risk. For this reason, the research and development of the switchgear busbar grounding device has been put on the agenda. The switchgear grounding device (CN202333586U) developed by our company has a chassis with universal wheels, and a telescopic pole on the chassis. The cross arm is equipped with grounding probes with the same spacing and parallel to each other. The front ends of the grounding probes are respectively equipped with grounding probes. One end of the grounding wire passes through the grounding probes and is connected to the grounding probes, and the other end is connected to the grounding busbar. This device greatly facilitates the connection of the switchgear busbar during maintenance and improves safety, but there are also the following defects: 1. The position of the grounding probe on the cross arm is fixed and can only be applied to specific switchgears. 2. Use the valve to drive the handcart to open the valve. After the electric test, the handcart needs to be withdrawn, and the bracket is installed and then pushed into the working position to realize the connection between the grounding part and the static contact. The operation is troublesome.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a busbar grounding device that can be adjusted according to the switchgear, which is convenient for connecting the busbar of the switchgear during maintenance, and has a switchgear with simple operation, good safety and wide application range Busbar grounding device.

The technical solution adopted in the present invention is a switchgear busbar grounding device, which includes a base with universal wheels, a bracket arranged on the base, a cross arm on the upper end of the bracket, and a position-adjustable fixture on the cross arm , the fixture fixes the grounding probe on the cross arm, the grounding probe is an insulating rod, the front end of the grounding probe is provided with a probe, and the ground wire is connected to the probe through the inside of the grounding probe.

The clamp is an openable and closable hoop. The position adjustment of the jig on the cross arm can be realized in the following ways. One is that a plurality of fixing holes are arranged on the cross arm, and the jig is fixed in the fixing holes. Another way is that a slide rail is arranged on the cross arm, and a slide block cooperating with the slide rail is arranged on the jig, and the slide block can be moved and fixed on the slide rail.

The upper and lower positions of the cross-arm can be adjusted. One way is that a plurality of fixing holes from top to bottom are arranged on the upper part of the bracket, and the cross-arm is fixed on the bracket through the fixing holes. Another way is that the stand can be adjusted up and down.

An insulating layer is provided outside the grounding probe to further improve the insulation of the grounding probe.

A positioning mark is arranged outside the grounding probe. Set a positioning mark on each grounding probe, and fix the grounding probe on the cross arm according to the position of the positioning mark to ensure that the contact depth of the three phases and the static contact is consistent.

The support is provided with a cable-stayed support rod, and the included angle between the cable-stayed support rod and the support is 30°-60°.

The probe is a plum blossom contact.

When the present invention is in use, according to the position of the three-phase static contact of different types of switch cabinets, the position of the cross arm and the clamp position of the fixed grounding probe are set, and the base with the bracket is pushed into the handcart room of the switch cabinet, and the valve is opened. After confirming that there is no voltage, there is no need to remove the base with bracket, and quickly install the grounding probe on the cross arm according to the position of the positioning mark. The plum blossom contact and the static contact are reliably connected to ensure the reliability of grounding.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic structural diagram of the probe of the present invention.

Fig. 3 is a structural schematic diagram of the grounding probe of the present invention.

In the figure, 1 base, 2 brackets, 3 cable-stayed support rods, 4 cross arms, 5 clamps, 6 fixing holes, 7 adjusting screws, 8 probes, 9 grounding probes, 10 positioning marks, 11 grounding wires, 12 fixing holes , 13 bolts.

detailed description

The switchgear busbar grounding device of the present invention includes a base 1 with universal wheels, a bracket 2 arranged on the base, a cross arm 4 is arranged on the upper end of the bracket 2, and a position-adjustable clamp 5 is arranged on the cross arm 4, The fixture 4 fixes the grounding probe 9 on the cross arm 4 , the grounding probe 9 is an insulating rod, the front end of the grounding probe 9 is provided with a probe 8 , and the grounding wire 11 is connected to the probe 8 through the inside of the grounding probe 9 .

In this embodiment, the fixture 5 adopts a hoop that can be opened and closed, and the tightness of the hoop is adjusted by adjusting the screw 7 . In order to realize the adjustment of the position of the clamp 5 on the cross arm and thus ensure the adjustment of the position of the grounding probe 9, in this embodiment, a plurality of fixing holes 12 are provided on the cross arm 4, and the clamp 5 can be passed through bolts or the like according to actual needs. fixed in the fixing hole 12. The advantage of this adjustment method is that the structure is simple, and the disadvantage is that the flexibility of clamp position adjustment is poor. It is also possible to set guide rails on the cross arm 4, and slide blocks are arranged below the fixture, and the slide blocks move on the guide rails on the cross arms to realize the position adjustment of the fixture. The advantage of this adjustment method is that the position adjustment of the jig has good flexibility, but it is certain that the structure is relatively complicated and the production cost is relatively high. The structure of the guide rail and the slider is a common structure in the mechanical field. Those skilled in the art can realize the solution according to the above technical description, and the structure of the guide rail and the slider will not be described here.

The up and down position adjustment of the cross arm, CN202333586U is realized by adjusting the bracket up and down. In this embodiment, the upper part of the bracket 2 is provided with a plurality of fixing holes 6 from top to bottom, and the bolt 13 passes through the fixing holes 6 to fix the cross arm 4 on the bracket 2 superior. You can choose different fixing holes to fix the cross arm according to actual needs.

In order to install the three grounding probes on the cross arm conveniently and quickly, set a positioning mark 10 on each grounding probe, and fix the grounding probe on the cross arm according to the position of the positioning mark 10, to ensure the contact depth between the three phases and the static contact unanimous. The structure of the probe of the present invention is a plum blossom contact as shown in 2, which can ensure reliable connection with the static contact and improve the safety of the grounding device.

In order to improve the stability of the bracket, the bracket 2 is provided with a cable-stayed support rod 3, and the included angle between the cable-stayed support rod 3 and the bracket 2 is 30°-60°.

Claims (10)

1. a switch cabinet bus grounding device, comprise the base with universal wheel, be arranged on the support on base, pedestal upper end is provided with cross-arm, it is characterized in that: jig cross-arm being provided with position-adjustable, ground connection inserting tube is fixed on cross-arm by jig, and ground connection inserting tube is insulating bar, ground connection inserting tube front end is provided with probe, and ground wire is connected with probe through ground connection inserting tube inside.

2. switch cabinet bus grounding device according to claim 1, is characterized in that: described jig is can the anchor ear of folding.

3. switch cabinet bus grounding device according to claim 1, is characterized in that: cross-arm is arranged multiple fixing hole, jig is fixed in fixing hole.

4. switch cabinet bus grounding device according to claim 1, is characterized in that: cross-arm is provided with slide rail, jig is provided with the slide block coordinated with slide rail, and slide block can move fixing on slide rail.

5. switch cabinet bus grounding device according to claim 1, is characterized in that: frame upper is provided with multiple fixing hole from top to bottom, and cross-arm is fixed on support through fixing hole.

6. switch cabinet bus grounding device according to claim 1, is characterized in that: described support can up-down adjustment.

7. switch cabinet bus grounding device according to claim 1, is characterized in that: be provided with insulating barrier outside described ground connection inserting tube.

8. switch cabinet bus grounding device according to claim 1, is characterized in that: described ground connection inserting tube is outside equipped with location mark.

9. switch cabinet bus grounding device according to claim 1, is characterized in that: described support is provided with oblique pull support bar, and the angle of oblique pull support bar and support is 30 °-60 °.

10. switch cabinet bus grounding device according to claim 1, is characterized in that: described probe is quincunx contact.