CN206532896U - A kind of bus tie and the switch cabinet combining structure using the connector - Google Patents

Abstract

The utility model relates to a busbar connector and a switch cabinet combined cabinet structure using the connector. The busbar connector includes a T-shaped insulating bushing, and an electrified conductor is arranged inside the T-shaped insulating bushing. The lower end of the electrified conductor is used for The conductive end electrically connected with the corresponding conductor in the switch cabinet, the upper end of the energized conductor is provided with a threaded mounting hole whose center line extends along the left and right directions, and the inner thread of the threaded mounting hole is equipped with a double-ended stud. The combination structure of the switch cabinet of the utility model adopts the threaded connection mode of the conductive rod and the double-headed stud, and the screwing depth of the conductive rod can be controlled, and the two conductive rods are screwed in at the same time until they cannot be screwed. For the busbar connector in the middle position, the ends of the two opposite conductive rods are equivalent to being clamped on both sides of the current-carrying conductor, and the electrical connection is more reliable. After the conductive rod is installed, due to the threaded connection, the conductive rod will not move axially, and the connection is more reliable.

Description

A busbar connector and a switch cabinet combining structure using the connector

technical field

The utility model relates to the field of electrical connection structures between gas insulated switchgears, in particular to a bus bar connector and a switch cabinet combining structure using the connector.

Background technique

During the use and installation of medium-voltage gas-insulated metal-enclosed switchgear, various switch cabinets need to be combined. The focus of customer consideration. Poor quality connectors can easily lead to unreliable cabinet combinations and insulation failures, seriously affecting the stability and life of switchgear, and causing major hidden dangers to the normal power supply of the power system. The early medium-voltage gas-insulated switchgears used cable busbars and gas-filled busbars for the cabinet combination, which was quite difficult to install, could not be plugged in and out, and had poor expandability.

The Chinese utility model patent with the authorized announcement number CN102157830B discloses a solid insulated busbar connector, which includes a T-shaped insulating sleeve, an insulating rubber sleeve, a conductive rod and a plug, and the current-carrying conductor in the T-shaped insulating sleeve One end is provided with a through hole whose center line extends along the left and right directions, and a spring contact finger is arranged in the through hole, and the lower end of the electric conductor is arranged in the gas switch cabinet and connected with the conductor in the switch cabinet. The sockets at both ends of the insulating rubber sleeve are respectively matched and connected with the nozzles of the T-shaped insulating bushings on two adjacent switch cabinets, and two pressing plates are arranged at the joints, and fastening bolts are arranged on the pressing plates. The insulating rubber sleeve is composed of an inner shielding layer, an outer shielding layer and an insulating layer between the two. The conductive rod runs through the insulating rubber sleeve, and there is an air gap between the two, which may cause partial discharge. When installing, first splice the switch cabinets to be connected left and right, bend the insulating rubber sleeves so that the two ends of the sleeves are respectively placed into the nozzles of the T-shaped insulating bushings on the two switch cabinets, and then let the insulating rubber sleeves stretch naturally. Straight, the conductive rod is inserted from the nozzle of one of the T-shaped insulating bushings, the energized conductors of the switch cabinet are connected to each other through the conductive rod, and then the pressure plate is tightened by bolts to compress the socket of the insulating rubber sleeve. When the quantity of switchgears combined increases, when the conductive rods are inserted again, the insertion position of the conductive rods is not easy to control, which will drive the adjacent pre-installed conductive rods to move axially. In addition, the two connectors are connected and fixed through an insulating rubber sleeve, and the insulating rubber sleeve has certain elasticity. The lack of contact between adjacent conductive rods will make the connection of the connector unreliable and also affect the flow capacity.

Contents of the invention

The purpose of the utility model is to provide a busbar connector with firm installation and reliable performance. At the same time, the utility model also provides a switch cabinet combining structure using the connector.

In order to achieve the above purpose, the technical scheme of the busbar connector in the utility model is as follows: the busbar connector includes a T-shaped insulating sleeve, and a live conductor is arranged in the T-shaped insulating sleeve, and the lower end of the live conductor is used for connecting with the switch cabinet. The conductive end that is electrically connected to the corresponding conductor inside, the upper end of the current-carrying conductor is provided with a threaded installation hole whose center line extends along the left and right directions, and the inner thread of the threaded installation hole is equipped with a double-ended stud.

The T-shaped insulating sleeve has a straight through hole with a center line extending along the left and right directions for the corresponding conductive rod to be axially inserted into. The center line of the threaded mounting hole is collinear with the center line of the through hole.

The energized conductor is composed of an upper conductor and a lower conductor, the threaded mounting hole is set on the upper conductor, and the lower conductor is a stud structure used for threaded connection with the outlet casing of the switch cabinet.

A step structure is formed between the upper conductor and the lower conductor, an auxiliary conductive block is pierced on the lower side of the step structure on the energized conductor, and the upper end of the auxiliary conductive block is provided with a concave end portion of a corresponding conductive rod for conductive support curved conductive surface.

The technical scheme of the switch cabinet and cabinet structure in the utility model is as follows:

The switchgear combined cabinet structure includes at least two busbar connectors arranged at intervals on the left and right. Conductive rods are arranged between two adjacent busbar connectors. The busbar connectors include T-shaped insulating sleeves and T-shaped insulating sleeves. There is an electrified conductor inside the casing, the lower end of the electrified conductor is a conductive end for electrical connection with the corresponding conductor in the switch cabinet, and the upper end of the electrified conductor is provided with a threaded mounting hole whose center line extends along the left and right directions. The inner thread of the mounting hole is equipped with double-ended studs, and both ends of the conductive rod are provided with threaded blind holes, and the conductive rod is threadedly connected with the double-ended studs on both sides.

The T-shaped insulating sleeve has a straight through hole with a center line extending along the left and right directions for the conductive rod to be axially inserted into. The center line of the threaded mounting hole is collinear with the center line of the through hole.

The energized conductor is composed of an upper conductor and a lower conductor, the threaded mounting hole is set on the upper conductor, and the lower conductor is a stud structure used for threaded connection with the outlet casing of the switch cabinet.

A step structure is formed between the upper conductor and the lower conductor, an auxiliary conductive block is pierced on the lower side of the step structure on the energized conductor, and a concave conductive support is provided on the upper end of the auxiliary conductive block to connect with the end of the conductive rod. curved conductive surface.

In the switch cabinet combination structure, an insulating plug is also provided on the busbar connector located on the outside. The insulating plug is threaded with the end of the stud stud far away from the conductive rod. The insulating plug is connected to the current conductor. An exhaust block is arranged between them, and the exhaust block is sleeved on the studs.

The outer periphery of the conductive rod is provided with an insulating layer.

Beneficial effects of the utility model: the combined cabinet structure of the utility model includes a busbar connector and a conductive rod, and the conductive rod is used as an intermediate connector. The threaded connection method of the head stud can control the screwing depth of the conductive rods, and the two conductive rods are screwed in at the same time until they cannot be screwed. For the busbar connector in the middle position, the ends of the two opposite conductive rods are equivalent to being clamped on both sides of the current-carrying conductor, so the electrical connection is more reliable and the flow capacity is stronger. After the conductive rod is installed, due to the threaded connection, the conductive rod will not move axially, and the connection is more reliable. For the outer busbar connector, an insulating plug can be installed on the outer side of the stud to improve the insulation performance.

Description of drawings

Fig. 1 is a structural schematic diagram (in use state) of an embodiment of a switch cabinet combined cabinet structure of the present invention;

Fig. 2 is a schematic structural diagram of a busbar connector in Fig. 1;

Fig. 3 is a side view of Fig. 2;

Fig. 4 is a schematic structural view of the energized conductor in Fig. 2;

Fig. 5 is a schematic structural view of the auxiliary conductive block in Fig. 2;

FIG. 6 is a top view of FIG. 5 .

The names corresponding to the reference marks in the figure: 1. Gas box wall, 2. Insulating plug, 3. Insulating cap, 4. Nut, 5. Exhaust block, 6. Stud stud, 7. Conductive rod, 8 . Auxiliary conductive block, 9. Conductor, 10. T-shaped insulating bushing, 11. Straight through hole, 12. Outlet bushing, 81. Arc-shaped conductive surface, 82. Perforation, 91. Threaded mounting hole, 92. Upper Conductor, 93, step structure, 94, lower conductor.

detailed description

The embodiment of the combination structure of the switchgear of the utility model: as shown in Fig. 1-6, it includes three busbar connectors arranged at left and right intervals, and a conductive rod 7 is arranged between two adjacent busbar connectors. The busbar connector includes a T-shaped insulating sleeve 10. The T-shaped insulating sleeve 10 has a straight-through hole 11 for axially loading the conductive rod with a center line extending along the left and right directions. The T-shaped insulating sleeve 10 is a three-way insulation cylinder. The T-shaped insulating sleeve 10 is integrally injected with an energized conductor 9, and the lower end of the energized conductor 9 is a conductive end for electrically connecting with the corresponding conductor in the switch cabinet. In this embodiment, the energized conductor is electrically connected to the outlet bushing 12. . The lower part of the T-shaped insulating sleeve 10 is provided with a socket for inserting with the outlet sleeve 12, and the socket is bell-shaped. The outlet bushing is arranged on the wall 1 of the gas box.

The current-carrying conductor 9 is composed of an upper conductor 92 and a lower conductor 94. The upper conductor 92 is provided with a threaded mounting hole 91 whose center line extends along the left and right directions. The lower conductor 94 is a stud structure used for threaded connection with the copper rod of the switch cabinet outlet casing. . The centerline of the threaded mounting hole 91 is collinear with the centerline of the through hole 11 of the T-shaped insulating sleeve 10 . The internal thread of the threaded mounting hole 91 is equipped with a double-ended stud 6, and both ends of the conductive rod 7 are provided with threaded blind holes, and the conductive rod 7 is threadedly connected with the double-ended stud 6 on both sides. The upper conductor 92 is flat and thin, so that the two ends of the double-ended studs extend out of the threaded mounting hole of the upper conductor. A step structure 93 is formed between the upper conductor and the lower conductor. The step structure 93 is an annular boss. An auxiliary conductive block 8 is pierced on the underside of the step structure 93 on the energized conductor 9. The auxiliary conductive block 8 adopts an auxiliary conductive block with excellent electrical conductivity. As for the conductive copper block, the upper end of the auxiliary conductive block 8 is provided with an arc-shaped conductive surface 81 which is concave and conductively supported by the end of the conductive rod, and the middle part is provided with a perforation 82 . By arranging the auxiliary conductive block, it plays the role of increasing the conduction area.

An insulating plug 2 is also provided on the outer busbar connector in the combined structure of the switch cabinet, and the insulating plug 2 is threadedly assembled with the end of the stud 6 away from the conductive rod 7 . An exhaust block 5 is arranged between the insulating plug 2 and the energized conductor, and the exhaust block 5 is sleeved on the double-ended stud 6 . The exhaust block 5 is a copper block. The outer side of the insulating plug is also covered with an insulating cap 3 to improve the insulating performance of the connector.

In order to improve the insulation performance, the outer layer of the busbar connector and the conductive rod as the intermediate connector has a fully shielded solid insulation layer with good elasticity, which is beneficial to eliminate air gaps during installation, uniform electric field, and reduce partial discharge.

When installing and using, insert the auxiliary conductive block 8 into the lower conductor 94 of the energized conductor, then insert the T-shaped insulating sleeve 10 on the outlet bushing of the switch cabinet, and the lower conductor 94 enters the copper rod in the outlet bushing In the threaded hole, the step structure on the current-carrying conductor presses and fixes the auxiliary conductive block 8 at the same time. The double-ended studs are screwed into the threaded mounting holes of the energized conductors, and the two conductive rods are screwed to the two ends of the double-ended studs respectively. The outer peripheral surface is in contact with the arc-shaped conductive surface 81 of the auxiliary conductive block 8 to achieve firm fixation and reliable electrical connection. The connection between the busbar connector in the middle and the conductive rod is as above. For the outer busbar connector, an insulating plug needs to be assembled, and the outer busbar connector is fastened by the nut 4 before the assembly. Through the exhaust block, the air in the T-shaped insulating sleeve can be exhausted. Then thread the insulating plug 2 onto the stud, and then cover the insulating cap 3 .

In this embodiment, the T-shaped insulating sleeve is set to have a structure with left and right through holes, which can reduce the air gap between the conductive rod and the partial discharge; in other embodiments, the tube of the T-shaped insulating sleeve The mouth can also be provided with a trumpet-shaped structure.

In other embodiments, when the number of switch cabinets that need to be combined increases, the number of busbar connectors and conductive rods can be increased as required, for example, four busbar connectors are provided. When two switch cabinets are combined, the utility model's combined structure can also be used, and insulating plugs are installed at the ends of the studs on both sides.

In other embodiments, according to the actual structure of the conductor in the switch cabinet, the lower conductor of the energized conductor can also be adaptively changed. Shaped structure, plugged with the conductors in the switch cabinet to achieve conductive connection.

In the embodiment of the busbar connector of the utility model, the structure of the busbar connector is the same as that in the above-mentioned embodiment of the combined cabinet structure, and the specific implementation will not be described in detail, and reference may be made to the accompanying drawings 1-6.

Claims (10)

1. electrical conductor, the lower end of electrical conductor are provided with bus tie, including T font insulating sleeves, T fonts insulating sleeve For for the conducting end electrically connected with the respective conductors in switch cubicle, it is characterised in that：The upper end of the electrical conductor is provided with The threaded mounting hole that center line extends in left-right direction, the threaded mounting hole screw-internal thread fit has studs.

2. bus tie according to claim 1, it is characterised in that：The T fonts insulating sleeve has center line edge The clear opening that the corresponding contact rod of confession of left and right directions extension axially loads, the center line of the threaded mounting hole and the clear opening Centerline collineation.

3. bus tie according to claim 1, it is characterised in that：The electrical conductor is by upper conductor, lower conductor structure Into the threaded mounting hole is arranged on upper conductor, and lower conductor is the stud knot for being connected with switch cabinet outlet casing threads Structure.

4. bus tie according to claim 3, it is characterised in that：Platform is formed between the upper conductor, lower conductor Additional conductive block is equipped with stage structure, the electrical conductor on the downside of ledge structure, additional conductive block upper end is provided with indent Be used for the arc conducting surface of the corresponding conductive stick end of conductive supporting.

5. switch cabinet combining structure, it is characterised in that：Including at least two or so spaced bus ties, two adjacent Contact rod is equipped between the bus tie, bus tie includes setting in T font insulating sleeves, T font insulating sleeves There is electrical conductor, the lower end of electrical conductor is the conducting end for being electrically connected with the respective conductors in switch cubicle, and the energization is led The upper end of body is provided with the threaded mounting hole that center line extends in left-right direction, and the threaded mounting hole screw-internal thread fit has double end Stud, the two ends of contact rod are equipped with tapped blind hole, and contact rod is threadedly coupled with the studs of its both sides.

6. switch cabinet combining structure according to claim 5, it is characterised in that：The T fonts insulating sleeve has center The clear opening that confession that line the extends in left-right direction contact rod axially loads, the center line of the threaded mounting hole with it is described straight The centerline collineation of through hole.

7. switch cabinet combining structure according to claim 5, it is characterised in that：The electrical conductor by upper conductor, under lead Body is constituted, and the threaded mounting hole is arranged on upper conductor, and lower conductor is the spiral shell for being connected with switch cabinet outlet casing threads Rod structure.

8. switch cabinet combining structure according to claim 7, it is characterised in that：Formed between the upper conductor, lower conductor Have and be equipped with additional conductive block on ledge structure, the electrical conductor on the downside of ledge structure, additional conductive block upper end is provided with The arc conducting surface with the conductive stick end conductive supporting of indent.

9. the switch cabinet combining structure according to any one of claim 5 to 8, it is characterised in that：In switch cabinet combining structure Be additionally provided with insulation plug on the bus tie in outside, insulation plug and the one of the remote contact rod of the studs Screw assembly is held, exhaust block is provided between the insulation plug and the electrical conductor, exhaust block is set in the studs On.

10. the switch cabinet combining structure according to any one of claim 5 to 8, it is characterised in that：The periphery of the contact rod Provided with insulating barrier.