CN214957380U - High-voltage grounding device suitable for high-voltage cabinet - Google Patents

Abstract

A high-voltage grounding device suitable for a high-voltage cabinet comprises an insulating rod, a tulip contact, an insulating plastic antiskid handle, a limiting ring, a connecting copper bar, a double-hole wiring nose, an anti-bending protection spring, a branch line, a tail line and a grounding clip; the bus can be grounded under the condition that a bus cover plate of the high-voltage cabinet is not removed, so that the grounding wire is convenient to mount, the plug-in type grounding wire mounting mode at the static contact position of the high-voltage cabinet with multiple specifications can be suitable, the application range is wide, and the contact is good; the branch lines are connected in series, so that the number of joints is reduced, multi-joint crimping is avoided, and the hidden danger of infirm multi-joint crimping is reduced; each compression joint is provided with an anti-bending protection spring, so that the connection wire is prevented from being broken or loosened due to long-term bending; the grounding clamp is provided with the multi-diameter groove, can be suitable for grounding screws or grounding bars with various specifications, and has a wide application range, and the movable end adopts the movable fastening handle to facilitate force application and fastening; the insulating rod adopts flexible mode, is applicable to 35kV and following high-tension apparatus, practices thrift the cost, is convenient for maintain.

Description

High-voltage grounding device suitable for high-voltage cabinet

Technical Field

The utility model belongs to the technical field of high-voltage insulation, a high-voltage grounding device suitable for high-voltage board is related to.

Background

The high-voltage grounding wire is a device for ensuring safety when electrostatic induction electric shock or false switching-on is generated near a charged body. Generally, the voltage of indoor high-voltage equipment is below 35kV, and a high-voltage grounding wire is required to be used in the high-voltage cabinet maintenance. Generally, a high-voltage grounding wire is divided into the following parts according to the use environment: an indoor busbar-type ground line (JDX-NL) and an outdoor line-type ground line (JDX-WS). Meanwhile, as the voltage grade is higher, the insulating rod is longer, and a plurality of groups of field grounding wires need to be prepared. Female row type earth connection is owing to must install in the bus-bar room, consequently must open cabinet door and bus-bar chamber apron behind the high-voltage board before installing, has the risk of electrocuting demolising the apron in-process, need prepare multiple instrument simultaneously and be used for opening back cabinet door and bus-bar chamber apron, has increased instrument preparation time and personnel's work load, and bus-bar installation direction and interval are not certain moreover can effectively install the fastener on female arranging, can not guarantee that the contact is good. Generally, an O-shaped wiring terminal is adopted at the tail of a grounding wire, a grounding bolt needs to be welded or a screw hole needs to be reserved on a grounding bar, and a screw rod smaller than the O-shaped wiring terminal hole is selected to fasten the grounding end by means of a tool, so that a fastening tool needs to be prepared before grounding, a nut needs to be prepared, or a screw rod and a nut matched with the nut need to be prepared, a plurality of tools are prepared, the time is long, and the workload of workers is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high-voltage grounding device suitable for high-voltage board can avoid installing and open the generating line chamber apron before the earth connection, and conductor side can directly be installed at PT cabinet or switch board primary static contact department plum blossom contact cut straightly, and the applicable many specifications terminal of ground connection side or the strong ground connection clamp of suitability of ground connection row need not directly to screw up with the help of the spanner.

The technical scheme of the utility model:

the utility model provides a high-voltage grounding device suitable for high-voltage board, includes insulator spindle, plum blossom contact, insulating plastic antiskid handle, spacing ring, connects copper bar, diplopore wiring nose, anti protection spring, bifurcated line of rolling over, tail-wire and ground clamp. The insulating rod is designed to be two-section telescopic, so that a proper length can be selected according to the field use condition; the insulating rod tail is sleeved with an insulating plastic antiskid handle, and the tail is provided with a red limiting ring, so that multiple groups of grounding wires do not need to be prepared on the same site, and the cost is reduced and the management is facilitated. The plum blossom contact is designed to be a double-layer dual-purpose type and is suitable for inner and outer layer static contacts with different specifications. The connecting copper bar is bent by a copper bar and used for connecting the insulating rod and the plum blossom contact, and a hole is formed in the side face of the connecting copper bar and used for fixing the grounding branch line. The branch line and the tail line are formed by twisting a plurality of strands of copper wires, and are covered with a soft and high-temperature-resistant transparent insulating protective layer to prevent the abrasion to the grounding copper wires in use. The grounding clip is made of aluminum die casting and is provided with double holes.

The fixed end of the grounding clamp adopts a wide and flat mode to increase the contact area, and is provided with arc grooves with different diameters so as to facilitate the use of different grounding screws; the movable end of the grounding clamp adopts a rectangular conductive block with the width matched with that of the fixed end, the fixed end is provided with an arc groove corresponding to the fixed end so as to increase the contact area of the screw rod, and the side part of the grounding clamp is provided with a guide groove so as to prevent the movable end from slipping off when being fastened or loosened; the movable fastening handle is arranged at the tail of the movable end of the grounding clip, so that the grounding clip can be fastened by force.

The utility model has the advantages that: the grounding mode of indoor high-voltage equipment is changed, the bus can be grounded under the condition that a bus cover plate of the high-voltage cabinet is not removed, and the grounding wire is convenient to install; the method is suitable for the installation mode of the plug-in type ground wire at the static contact of the high-voltage cabinet with multiple specifications, and has wide application range and good contact; the insulating rod adopts a telescopic mode, is suitable for high-voltage equipment of 35kV and below, saves cost and is convenient to maintain; the branch lines are connected in series, so that the number of joints is reduced, multi-joint crimping is avoided, and the hidden danger of infirm multi-joint crimping is reduced; each compression joint is provided with an anti-bending protection spring, so that the connection wire is prevented from being broken or loosened due to long-term bending; the grounding clamp is provided with a plurality of grooves, is suitable for grounding screws or grounding bars with various specifications, has a wide application range, and the movable end adopts a movable fastening handle to facilitate force application and fastening.

Drawings

Fig. 1 is a diagram of a ground rod.

Fig. 2 is a bifurcation and tail line diagram.

Fig. 3 is a ground clip diagram.

Fig. 4 is a side view of a dual-layer dual-purpose tulip contact.

In the figure: 1-an insulating rod; 2-double-layer dual-purpose plum blossom contact; 3-insulating plastic antiskid handle; 4-a limiting ring; 5-connecting copper bars; 6-double-hole wiring nose; 7-anti-bending protection spring; an 8-bifurcation line; 9-tail; 10-ground clip.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 shows: a high-voltage grounding wire suitable for a high-voltage cabinet comprises an insulating rod 1, a double-layer dual-purpose plum blossom contact 2, an insulating plastic antiskid handle 3, a limiting ring 4, a connecting copper bar 5, a double-hole wiring nose 6 with the diameter of phi 25 being 6mm, an anti-bending protection spring 7 and a branch line 8,a tail 9 and a ground clip 10. Because the static contact of the PT trolley which is used more commonly on site is 630A phi 35 x 82mm, in order to improve the universality of the static contact, the plum blossom-shaped contact is designed into a double-layer dual-purpose type, the outer layer can be suitable for the static contact of 1250A phi 49 x 82mm, and the inner layer can be suitable for the static contact of 630A phi 35 x 82 mm. The insulator spindle adopts two sections flexible modes, and outer festival length 1m, extensible interior festival 0.5m can be used for 10kV or 35kV ground connection according to the field usage, and the insulator spindle afterbody cover has insulating plastic anti-skidding handle, and handle length is 115mm, and afterbody 200mm department sets up red spacing ring. Therefore, multiple groups of grounding wires do not need to be prepared on the same site, so that the cost is reduced and the management is convenient. The connecting copper bar is bent by adopting a 5 x 40mm copper bar and is used for connecting the insulating rod and the plum blossom contact, and two phi 6mm holes are formed in the side surface of the connecting copper bar and are used for fixing the grounding branch line. The ground branch line and the tail line are 25mm²The stranded copper wire is formed by twisting a plurality of strands of high-quality copper wires, and is covered with the soft and high-temperature-resistant transparent insulating protective layer, so that abrasion to the grounding copper wire in use can be prevented. The branch wires adopt a serial connection mode, and the hidden trouble that a plurality of grounding wires are loose in use due to insecure compression joint is avoided. The length of the two bifurcate lines is 1.5m, and the length of the tail line is 5 m. The wrought aluminum die-casting double-hole grounding clamp has the advantages of strong oxidation resistance, no rustiness, strong conductivity, good toughness and light weight. The fixed end of the grounding clamp adopts a wide and flat mode to increase the contact area, and the groove with phi 6, phi 8 and phi 12 can be suitable for the corresponding grounding screw rod. The movable end of the grounding clamp adopts a rectangular conductive block with the width matched with that of the fixed end, the side part of the grounding clamp is provided with a guide groove to prevent slipping during fastening, and the tail part of the movable end is provided with a movable fastening handle to facilitate force application and fastening. All the terminals use the double-hole wiring copper noses, and the anti-bending protection springs are sleeved in the terminals before crimping, so that the wires are prevented from loosening or breaking due to bending stress of the wires used for a long time at the crimping position.

The utility model discloses high-pressure earth connection's application method:

(1) installation: fixing the double-hole copper noses on the branch line on corresponding positions of the plum blossom-shaped contact (fixed and movable contact clips), and fixing the double-hole copper noses on the grounding tail line on the grounding clip to form a set of complete grounding wire;

(2) (2) use of: determining whether the extension rod needs to be pulled out or not according to the voltage grade, wherein the extension rod does not need to be hung out if the extension rod is grounded below 35kV, and the extension rod needs to be hung out if the extension rod is grounded at 35 kV; and selecting whether to use an external plum blossom contact or an internal plum blossom contact according to the diameter of the static contact, wherein if the diameter of the static contact is 49X 82mm, the external plum blossom contact is used, and if the diameter of the static contact is 35X 82mm, the internal plum blossom contact is used. Before the grounding wire is used, the fact that power failure of equipment is confirmed through electricity before, the fact that the equipment has no voltage is confirmed, before the plum blossom contact is plugged, the equipment is subjected to point contact discharge phase by phase, and then the plum blossom contact is plugged;

(3) installing a grounding wire: firstly, the grounding clip is connected, and then the tulip contact is connected; when the grounding wire is dismantled, the electric clamp is firstly dismantled and then the grounding clamp is dismantled according to the program;

(4) maintenance: the method comprises the steps of regularly checking a grounding branch line and a tail line to confirm whether strands are broken or not, regularly checking a grounding branch line and a tail line connecting terminal to confirm whether crimping is fastened or not; regularly checking the tulip contact to determine whether the abrasion affects the contact surface and whether the tulip contact tension spring is fatigue and insufficient tension; and voltage resistance inspection is regularly carried out on the insulating rod, so that the surface of the insulating rod is clean and good in insulation.

Claims (2)

1. The utility model provides a high-voltage grounding device suitable for high-voltage board which characterized in that: the anti-bending type grounding switch comprises an insulating rod, a plum blossom contact, an insulating plastic anti-skidding handle, a limiting ring, a connecting copper bar, a double-hole wiring nose, an anti-bending protection spring, a branch line, a tail line and a grounding clip; the insulating rod is designed to be two-section telescopic, and the tail part of the insulating rod is sleeved with an insulating plastic anti-slip handle and provided with a red limiting ring; the tulip contact is designed to be a double-layer dual-purpose type; the connecting copper bar is bent by adopting a copper bar, and the side surface of the connecting copper bar is provided with a hole for fixing a grounding branch line; the ground clamp is provided with a double hole.

2. The high voltage grounding device for high voltage cabinet as claimed in claim 1, wherein: the fixed end of the grounding clamp adopts a wide and flat mode and is provided with arc grooves with different diameters; the movable end of the grounding clamp adopts a rectangular conductive block with the width matched with that of the fixed end, the fixed end is provided with an arc groove corresponding to the fixed end, and the side part of the grounding clamp is provided with a guide groove; the tail part of the movable end of the grounding clip is provided with a movable fastening handle.

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