CN201069850Y - 12/24kV outside bus system and its connector - Google Patents

Abstract

The utility model relates to a 12/24 kV outlaid bus-bar system and connectors thereof, wherein the system comprises two T-shaped connectors, each includes a T-shaped silicon rubber sheath, the first end of the T-shaped sheath is sleeved on a bipass bushing of a switch case, the second end is plugged after installation, a pair of conductive blocks is arranged at the intersection of the horizontal portion and the vertical portion of the T-shaped sheath, a stud bolt is bolt jointed with the bipass bushing, the other end of the bipass bushing penetrates the conductive blocks and then is connected with a screw nut; and a bus-bar, wherein, the bus-bar includes a conductor and a silicon rubber sheath, both ends of the bus-bar are inserted at the third end of the sheath of the two T-shaped connectors and in crimp connection between the pair of conductive blocks in the sheath. The utility model utilizes the high elasticity of the silicon rubber to ensure that the connector sheath compresses the bipass bushing and the bus-bar of the switch box, thereby sealing and waterproof are ensured; bolt-type assembly design is adopted to facilitate the assembly and disassembly; silicon rubber material is adopted to be advantageous for environment protection; the out-layer shield has good safety performance.

Description

12/24kV external bus system and its connector

technical field

The utility model relates to a power switch system, in particular to a bus connection system for expanding switches outside a medium-voltage power switch cabinet and a special connector thereof.

Background technique

At present, the expansion of the medium voltage switch mainly includes increasing the number of load units in the box or through the parallel expansion of single switches and multi-body switches. The disadvantage of adding load units in the box is that the box is made very large. The internal high-voltage state is very difficult, and if there is an accident in a group of switches during operation and air leakage occurs, all switches cannot be used. Using the switch shielded busbar connection system will make the switch busbars connected outside the gas box, and will not be damaged due to local Failure results in damage to the entire switch.

Contents of the invention

The purpose of the utility model is to provide a shielded busbar connection system for external expansion of the power switch cabinet, which is easy to assemble and disassemble, fully insulated, fully sealed, fully protected, and easy to use.

The utility model 12/24kV external busbar system includes:

Two T-shaped connectors, each T-shaped connector includes a T-shaped silicone rubber sheath with a shielding layer on the outer surface, the first end of the T-shaped sheath is placed on the epoxy double-way bushing of the switch box, and the first The second end opposite to the end is installed with a back plug and a shielded silicone rubber back plug made of conductive silicone rubber. A pair of conductive blocks are installed at the intersection of the horizontal part and the vertical part of the T-shaped sheath. One end of a stud bolt is connected to the The double-way casing is screwed, and the other end of the stud bolt vertically passes through the pair of conductive blocks and is connected to the nut installed in the rear plug at the second end of the T-shaped sheath; and,

A bus bar, the bus bar includes a conductor and a silicone rubber sheath covering the conductor, the outer surface of the silicone rubber sheath has a shielding layer, the two ends of the bus bar are respectively inserted from the third end of the sheath of the two T-shaped connectors and Crimp between a pair of conductive bumps inside the sheath.

An expansion bus connection system capable of expanding multiple power switch cabinets outside one power switch cabinet, including:

Two T-shaped connectors, each T-shaped connector includes a T-shaped silicone rubber sheath with a shielding layer on the outer surface, the first end of the T-shaped sheath is sleeved on the double-way bushing of the switch box, and the first end The opposite second end is blocked after installation, and a pair of conductive blocks are installed at the intersection of the horizontal part and the vertical part of the T-shaped sheath. One end of a stud bolt is screwed to the double-way casing, and the other end of the stud bolt Vertically pass through the pair of conductive blocks and connect with the nut installed in the rear plug at the second end of the T-shaped sheath;

At least one cross-shaped connector, the cross-shaped connector includes a cross-shaped silicone rubber sheath with a shielding layer on the outer surface, the first end of the cross-shaped sheath is sleeved on the double-way bushing of another switch box, and the first The opposite end of the second end is blocked after installation, a pair of conductive blocks are arranged at the center of the cross-shaped sheath, one end of a stud bolt is screwed to the double-pass casing, and the other end of the stud bolt vertically passes through the one The conductive block is connected to the nut in the second end of the cross-shaped sheath, and the third and fourth ends of the cross-shaped sheath are busbar insertion ends;

A shielded bus bar connected between the T-shaped connector and the cross-shaped connector. The bus bar includes a conductor and a silicone rubber sheath with a shielding layer covering the conductor. One end of the bus bar is connected from the sheath of the T-shaped connector. The third end is inserted and crimped between a pair of conductive blocks in the sheath, and the other end of the bus bar is inserted from the third end or fourth end of the sheath of the cross connector and crimped to the sheath. between a pair of conductive blocks; and,

A shielded bus bar connected between two adjacent cross-shaped connectors. The bus bar includes a conductor and a shielded silicone rubber sheath covering the conductor. One end of the bus bar is connected from the sheath of a cross-shaped connector. The third end is inserted and crimped between a pair of conductive blocks in the sheath, and the other end is inserted from the fourth end of the sheath of another cross connector and crimped to a pair of conductive blocks in the sheath between.

A T-shaped connector specially used for the above-mentioned busbar connection system, including a T-shaped silicone rubber sheath with a shielding layer on the outer surface, the first end of the T-shaped sheath is placed on the double-way bushing of the switch box, and the first end The opposite second end is blocked after installation, and a pair of conductive blocks are installed at the intersection of the horizontal part and the vertical part of the T-shaped sheath. One end of a stud bolt is screwed to the double-way casing, and the other end of the stud bolt is vertical Pass through the pair of conductive blocks and connect with the nut installed in the rear plug at the second end of the T-shaped sheath, and the third end of the T-shaped sheath is used for inserting the busbar.

This busbar connection system adopts connectors with silicone rubber sheath and busbar expansion switch. Using the high elasticity of silicone rubber, the connector sheath is pressed against the double-way bushing and busbar of the switch box to ensure sealing and waterproofing. Through the grounding of the shielding layer outside the silicone rubber sheath, the full insulation, full protection and flood resistance of the switchgear are realized.

It adopts a bolt-type assembly design, and realizes the connection between the busbar and the connector and the connector and the double-way bushing of the switch box through stud bolts. The connection is tight, the installation is simple and fast, easy to expand, and can be used many times.

This bus connection system has all the characteristics of silicone rubber tear resistance, electric tracking resistance, corrosion resistance, excellent electrical properties, hydrophobicity, flashover resistance and pollution resistance. The connector sheaths are all made of imported silicone rubber raw materials through high-temperature solid-state vulcanization process, the busbar sheath is made of imported silicone rubber raw materials with medium-temperature liquid vulcanization process, and the outer shielding layer is made of imported liquid conductive silicone rubber injection, with good shielding effect . In addition, due to the use of silicone rubber material, it is conducive to environmental protection.

This system is mainly used for external expansion switches of medium voltage power switch cabinets, especially SF ₆ fully insulated load switches or circuit breaker switches. It can effectively improve the insulation degree of the equipment and reduce the distance between switches.

Description of drawings

Fig. 1 is the structural representation of typical embodiment 1 of the utility model;

Fig. 2 is the structural representation of typical embodiment 2 of the utility model;

Figure 3 is a schematic diagram of the assembly of Embodiment 2.

Detailed ways

The utility model uses two T-shaped connectors to connect with the two-way bushings on the two switch boxes at both ends, and uses a cross-shaped connector to connect with the double-way bushings on the switch box in the middle. are connected by busbars. Therefore, it can use two T-shaped connectors and a busbar to connect two switch boxes together to realize the expansion of the power switch; it can also use two T-shaped connectors, a cross-shaped connector and two busbars to connect three The switch boxes are connected together to realize the expansion of the power switch; it is also possible to connect n+2 switch boxes together with two T-shaped connectors, n cross connectors and busbars to realize the expansion of the power switch. Further description below in conjunction with accompanying drawings.

Embodiment 1: Embodiment 1 is used to extend a power switch cabinet outside a medium voltage power switch cabinet.

As shown in Figure 1, the 12/24kV external busbar system in Embodiment 1 includes:

Two T-shaped connectors 1 and 1', the two T-shaped connectors 1 and 1' are respectively connected to the double-way bushing A of the first switch box and the epoxy double-way bushing B of the second switch box, each The T-shaped connectors all include a T-shaped silicone rubber sheath 11. The first end of the T-shaped sheath 11 is sleeved on the double-way sleeve of the switch box, and the second end opposite to the first end is plugged 18 after installation. A pair of conductive blocks 13 and 15 are installed at the intersection of the horizontal part and the vertical part of the sleeve 11, and one end of a stud bolt 12 is screwed to the double-pass casing, and the other end of the stud bolt 12 passes through the one vertically. The pair of conductive blocks 13, 15 are connected to the nut 16 in the second end of the T-shaped sheath 11; and,

A bus bar 2, the bus bar 2 includes a conductor 21 and a silicone rubber sheath 22 covering the conductor 21, and the two ends of the bus bar 2 are respectively inserted from the third end of the sheath 11 of the two T-shaped connectors 1 and 1' And it is crimped between a pair of conductive blocks 13 and 15 in the sheath 11 .

The outer surface of the T-shaped silicone rubber sheath 11 and the busbar silicone rubber sheath 21 has a shielding layer, and the T-shaped silicone rubber sheath is provided with a grounding wire installation hole 19, and the ground wire is fixed to the grounding wire installation hole 19 by bolts, so that the T-shaped The shielding layer on the outer surface of the silicone rubber sheath 11 and the busbar silicone rubber sheath 21 is reliably grounded through the ground wire, and the induced charge generated during the operation of the equipment is introduced into the ground, so as to realize full insulation, full sealing, full protection and anti-water flooding of the switchgear . Bolt fastening protects against accidental touch.

Each T-shaped connector also includes a plug 17 adapted to the second end cavity of its T-shaped sheath 11, the plug 17 is installed between the conductive block 15 and the rear plug 18 in the T-shaped sheath 11, and the stud bolt 12 The upper nut 16 is embedded in the lumen of the plug 17 .

Stress units 10 are provided at the contact parts between the T-shaped sheath 11 and the bus bar 2 and the T-shaped sheath 11 and the conductive blocks 13 and 15, and a unique stress treatment structure is adopted to integrate the stress insulation.

14 among the figure is a spacer, and its height is adapted to the diameter of the conductor 22 in the busbar, so that the stud bolt 12 can better lock the busbar 2 between the conductive blocks 13 and 15.

Embodiment 2: Embodiment 2 is used to expand three power switch cabinets outside one medium voltage power switch cabinet.

Referring to Figure 2, the 12/24kV external busbar system of Embodiment 2 includes:

Two T-shaped connectors 1 and 1', the two T-shaped connectors 1 and 1' are respectively connected to the double-way bushing A on the first power switch cabinet and the double-way bushing D on the fourth power switch cabinet, Both T-shaped connectors 1 and 1' include a T-shaped silicone rubber sheath 11. The first end (ie, the lower end) of the T-shaped sheath 11 is set on the double-way bushing of the switch box, and the second end opposite to the first end The two ends (i.e., the upper end) are installed to plug 18, and a pair of conductive blocks 13, 15 are installed at the intersection of the horizontal part and the vertical part of the T-shaped sheath 11. Each T-shaped connector also includes a stud 12, and the double-ended One end of the stud bolt 12 is screwed to the double-way casing, and the other end of the stud bolt 12 vertically passes through the pair of conductive blocks 13, 15 to connect with the nut 16 in the second end of the T-shaped sheath 11;

Two cross connectors 3, 3', two cross connectors 3, 3' are respectively connected with double-pass bushing B on the second power switch cabinet and double-pass bushing C on the third power switch cabinet, Each cross connector all comprises a cross silicon rubber sheath 31, and the first end (i.e. the lower end) of the cross sheath 31 is sleeved on the double-way sleeve of the switch box, and the second end opposite to the first end (i.e. upper end) plug 38 after installation, and a pair of conductive blocks 33, 35 are arranged at the center of the cross-shaped sheath 31, and each cross-shaped connector also includes a stud 32, and one end of the stud 32 is connected to the double-way sleeve Screw connection, the other end of the stud bolt 32 vertically passes through the pair of conductive blocks 33, 35 and is connected with the nut 36 in the second end of the cross-shaped sheath 31, the third end and the fourth end of the cross-shaped sheath 31 are busbar insertion end;

Connect the bus bar 2 between the T-shaped connector 1 and the cross connector 3. The bus bar 2 includes a conductor 21 and a silicone rubber sheath 22 covering the conductor 21. One end of the bus bar 2 is connected from the sheath of the cross connector 3. The third end (ie, the left end) of the sleeve 31 is inserted and crimped between a pair of conductive blocks 33, 35 in the sheath 31, and the other end of the bus bar 2 is connected from the third end of the sheath 11 of the T-shaped connector 1. inserted and crimped between a pair of conductive blocks 13, 15 in the sheath 11;

The bus bar 2' connected between the T-shaped connector 1' and the cross connector 3', one end of the bus bar 2' is inserted from the fourth end (ie the right end) of the sheath of the cross connector 3' and crimped on Between the pair of conductive blocks in the sheath, the other end of the bus bar 2' is inserted from the third end of the sheath of the T-shaped connector 1' and crimped between the pair of conductive blocks in the sheath; and ,

A bus bar 4 connected between two adjacent cross connectors 3, 3', the bus bar 4 includes a conductor and a silicone rubber sheath covering the conductor, and one end of the bus bar 4 is inserted into the sheath of the cross connector 3 The fourth end (i.e. the right end) of 31 is crimped between a pair of conductive blocks 33, 35 in the sheath 31, and the other end of the bus bar 4 is inserted into the third end (i.e. left end) and is crimped between a pair of conductive bumps inside the sheath.

The outer surfaces of the T-shaped silicone rubber sheath 11, the cross-shaped silicone rubber sheath 31 and the busbar silicone rubber sheath 21 all have shielding layers, and the T-shaped silicone rubber sheath 11 and/or the cross-shaped silicone rubber sheath 31 are provided with grounding Wire installation holes 19,39, the ground wire is connected to the ground wire installation holes 19,39. Make the T-shaped silicone rubber sheath 11, the cross-shaped silicone rubber sheath 31 and the shielding layer on the outer surface of the busbar silicone rubber sheath 21 reliably grounded through the ground wire, and guide the induced charge generated during the operation of the equipment into the ground, so as to realize the full protection of the switchgear. Insulated, fully sealed, fully protected and flood resistant.

Each T-shaped connector also includes a plug 17 adapted to the second end cavity of its T-shaped sheath 11, the plug 17 is installed between the conductive block 15 and the rear plug 18 in the T-shaped sheath 11, and the stud bolt 12 The upper nut 16 is embedded in the lumen of the plug 17 .

The contact portion of the T-shaped sheath 11 and the bus bar, and the contact portion of the T-shaped sheath 11 and the conductive blocks 13, 15 are provided with a stress unit 10; the contact portion of the cross-shaped sheath 31 and the bus bar, and the contact portion of the cross-shaped sheath 31 and the conductive The contact parts of the blocks 33 and 35 are provided with stress units 30, and a unique stress treatment structure is adopted to integrate the stress insulation.

The method of connecting the connector to the bus bar, and the double-way bushing of the connector and the switch box is described below in conjunction with Fig. 3:

1. Use a torque wrench to screw the stud bolts 12 and 32 into the two-way bushings A and B of the switch box respectively until it stops, clean carefully with an insulating cleaning towel, and evenly apply the installation paste.

2. Gently slide the two conductive blocks 13 and 15 together into the T-shaped sheath 11, install the spacer 14, and align the centers of the bolt holes of the conductive blocks 13 and 15 with the centers of the stud bolts 12. Insert the bus bar 2 into the connector 1 according to the direction shown in the figure, but not beyond the bolt holes of the conductive blocks 13 and 15 . Install the conductive blocks 33 and 35 in the cross-shaped sheath 31 in the same way, and insert the other end of the busbar 2 into the cross-shaped sheath 31 .

3. Put the above-mentioned integral parts in good condition into the two-way casings A and B, so that the stud bolts 12 pass through the bolt holes of the conductive blocks 13 and 15, and the stud bolts 32 pass through the bolt holes of the conductive blocks 33 and 35. Pass through the hole, then put large flat washers and spring washers on the stud bolts 12, 32, then screw on the nuts and tighten them with a torque wrench.

4. Use an insulating cleaning towel to carefully clean the part marked "M" in the figure and the cable tie N, and evenly apply the installation paste, put the cable tie N into the second end of the T-shaped sheath 11, and use a torque wrench to plug the rear plug 17 Tighten it in the second end of the T-shaped sheath 11, pull out the cable tie N, and cover the rear blocking cover 18. Plugging 37 and rear blocking cover 38 are installed at the second end of cross sheath 31 in the same way.

5. Connect one end of the ground wire to the ground wire installation hole 19 on the connector, and connect the other end to the ground point of the switchgear.

Disassembly steps:

1. Remove the grounding wire from the switchgear and the connector, remove the rear plug cover, unscrew the rear plug, unscrew the nut on the stud bolt, and take out the flat washer, spring washer and nut.

2. Take off the connector and the bus bar as a whole, and then pull out the bus bar.

3. Unscrew the stud bolts.

4. Carefully clean the disassembled parts and pack them well for next use.

This busbar connection system adopts connectors with silicone rubber sheath and busbar expansion switch. Using the high elasticity of silicone rubber, the connector sheath is pressed against the double-way bushing and busbar of the switch box to ensure sealing and waterproofing. By grounding the shielding layer outside the silicone rubber sheath, the full insulation, full protection and flood resistance of the switchgear are realized. It uses stud bolts to realize the connection between the bus bar and the connector, and between the connector and the double-way bushing of the switch box. The connection is tight, the installation is simple and fast, easy to expand, and it can be used many times.

This bus connection system has all the characteristics of silicone rubber tear resistance, electric tracking resistance, corrosion resistance, excellent electrical properties, hydrophobicity, flashover resistance and pollution resistance. The connector sheaths are all made of imported silicone rubber raw materials through high-temperature solid-state vulcanization process, the busbar sheath is made of imported silicone rubber raw materials with medium-temperature liquid vulcanization process, and the outer shielding layer is made of imported liquid conductive silicone rubber injection, with good shielding effect .

This system is mainly used for external expansion switches of medium voltage power switch cabinets, especially SF ₆ fully insulated load switches or circuit breaker switches. It can effectively improve the insulation degree of the equipment and reduce the distance between switches. The current is conducted through copper rods or copper tubes, with high conduction efficiency, easy disassembly and assembly, and convenient inspection and testing of switches.

Claims (10)

1. 12/24kV external busbar system, characterized by including: Two T-shaped connectors, each T-shaped connector includes a T-shaped silicone rubber insulating sheath with a shielding layer on the outer surface, the first end of the T-shaped sheath is set on the epoxy sleeve of the switch cabinet, and the first end The opposite second end is blocked after installation, and a pair of conductive blocks are installed at the intersection of the horizontal part and the vertical part of the T-shaped sheath. One end of a stud bolt is screwed with the epoxy sleeve, and the other end of the stud bolt is vertically passing through the pair of conductive blocks and connecting with a nut installed in the rear plug at the second end of the T-shaped sheath; and A bus bar, the bus bar includes a conductor and a silicone rubber insulating sheath covering the conductor. The outer surface of the silicone rubber sheath has a conductive liquid silicone rubber shielding layer. The third end is inserted between a pair of conductive blocks compressed in the sheath by stud bolts. 2. The 12/24kV external busbar system according to claim 1, characterized in that: the T-shaped silicone rubber sheath is provided with a ground wire installation hole, and the ground wire is connected to the ground wire installation hole. 3. The 12/24kV external busbar system according to claim 1 or 2, characterized in that: each T-shaped connector also includes a plug adapted to the inner cavity of the second end of the T-shaped sheath, and the plug is installed on Between the conductive block in the T-shaped sheath and the rear plug, the nuts on the stud bolts are embedded in the inner cavity of the plug. 4. The 12/24kV external busbar system according to claim 1 or 2, characterized in that stress units are provided at the contact parts between the T-shaped sheath and the busbar, and between the T-shaped sheath and the conductive block. 5. 12/24kV external busbar system, characterized by including: Two T-shaped connectors, each T-shaped connector includes a T-shaped silicone rubber sheath with a shielding layer on the outer surface, the first end of the T-shaped sheath is sleeved on the double-way bushing of the switch box, and the first end The opposite second end is blocked after installation, and a pair of conductive blocks are installed at the intersection of the horizontal part and the vertical part of the T-shaped sheath. One end of a stud bolt is screwed to the double-way casing, and the other end of the stud bolt Vertically pass through the pair of conductive blocks and connect with the nut installed in the rear plug at the second end of the T-shaped sheath; At least one cross-shaped connector, the cross-shaped connector includes a cross-shaped silicone rubber sheath with a shielding layer on the outer surface, the first end of the cross-shaped sheath is sleeved on the double-way bushing of another switch box, and the first The opposite end of the second end is blocked after installation, a pair of conductive blocks are arranged at the center of the cross-shaped sheath, one end of a stud bolt is screwed to the double-pass casing, and the other end of the stud bolt vertically passes through the one The conductive block is connected to the nut in the second end of the cross-shaped sheath, and the third and fourth ends of the cross-shaped sheath are busbar insertion ends; A shielded bus bar connected between the T-shaped connector and the cross-shaped connector. The bus bar includes a conductor and a silicone rubber sheath with a shielding layer covering the conductor. One end of the bus bar is connected from the sheath of the T-shaped connector. The third end is inserted and crimped between a pair of conductive blocks in the sheath, and the other end of the bus bar is inserted from the third end or fourth end of the sheath of the cross connector and crimped to the sheath. between a pair of conductive blocks; and, A shielded bus bar connected between two adjacent cross-shaped connectors. The bus bar includes a conductor and a shielded silicone rubber sheath covering the conductor. One end of the bus bar is connected from the sheath of a cross-shaped connector. The third end is inserted and crimped between a pair of conductive blocks in the sheath, and the other end is inserted from the fourth end of the sheath of another cross connector and crimped to a pair of conductive blocks in the sheath between. 6. The 12/24kV external busbar system according to claim 5, characterized in that: the T-shaped silicone rubber sheath and/or the cross-shaped silicone rubber sheath is provided with a ground wire installation hole, and the ground wire is connected to the ground wire mounting holes. 7. The 12/24kV external bus bar system according to claim 5 or 6, characterized in that: the contact portion between the T-shaped sheath and the bus bar, the contact portion between the T-shaped sheath and the conductive block, and the cross-shaped sheath The contact part with the bus bar, the contact part between the cross-shaped sheath and the conductive block are all provided with stress units. 8. A T-shaped connector dedicated to the bus connection system described in claim 1 or 5, characterized in that: it includes a T-shaped silicone rubber sheath with a shielding layer on the outer surface, and the first end of the T-shaped sheath is placed on the switch On the double-way casing of the box, the second end opposite to the first end is installed and blocked, and a pair of conductive blocks are installed at the intersection of the horizontal part and the vertical part of the T-shaped sheath, and one end of a stud bolt is connected to the double-ended Screw connection through the casing, the other end of the stud bolt vertically passes through the pair of conductive blocks to connect with the nut installed in the rear plug at the second end of the T-shaped sheath, and the third end of the T-shaped sheath is used for inserting the busbar . 9. The T-shaped connector according to claim 8, characterized in that: the T-shaped silicone rubber sheath is provided with a ground wire installation hole, and the ground wire is connected to the ground wire installation hole. 10. The T-shaped connector according to claim 8, characterized in that: it also includes a plug adapted to the inner cavity of the second end of the T-shaped sheath, and the plug is installed between the conductive block in the T-shaped sheath and the rear plug Between them, the nuts on the stud bolts are embedded in the clogged inner cavity; the contact parts between the T-shaped sheath and the busbar and the contact parts between the T-shaped sheath and the conductive block are all provided with stress units.

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