CN110942965A

CN110942965A - 40.5kV solid insulation switch cabinet

Info

Publication number: CN110942965A
Application number: CN201911263087.0A
Authority: CN
Inventors: 田银磊; 孙龙; 朱志伟; 唐晓鹏; 王伟平; 齐佳伟
Original assignee: Beijing Sojo Electric Co Ltd
Current assignee: Beijing Sojo Electric Co Ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-03-31
Anticipated expiration: 2039-12-11
Also published as: CN110942965B

Abstract

The invention relates to a 40.5kV solid insulation switch cabinet, which comprises a cabinet body and three groups of solid insulation switches arranged in the cabinet body, wherein each solid insulation switch comprises a circuit breaker and a disconnecting switch, each circuit breaker comprises an incoming line connecting piece, a vacuum arc-extinguishing piece and an insulation pull rod, each incoming line connecting piece comprises a first insulation cylinder and an incoming line contact seat arranged in the first insulation cylinder, each vacuum arc-extinguishing piece comprises a second insulation cylinder, a vacuum arc-extinguishing chamber, an arc-extinguishing upper contact seat and an arc-extinguishing lower contact seat which are arranged in the second insulation cylinder, the upper end of each insulation pull rod is connected with a moving contact of the vacuum arc-extinguishing chamber, the lower end of each insulation pull rod is connected with a circuit breaking mechanism through a transmission device, each disconnecting switch, the isolating switch also comprises a hollow conducting rod and a lead screw used for driving the conducting rod to move up and down, and the upper end of the lead screw is connected with an isolating mechanism through a gear box. The novel electric heating furnace has the advantages of compact structure, easiness in preparation, convenience in disassembly and assembly, small occupied space, safety and reliability.

Description

40.5kV solid insulation switch cabinet

Technical Field

The invention relates to high-voltage electrical equipment switch equipment, in particular to a 40.5kV solid insulation switch cabinet.

Background

Most of 40.5KV switch equipment widely used in the market at present uses SF6 as an insulating medium, but SF6 has toxicity after arc extinction, is easy to leak and generates a greenhouse effect, and is not beneficial to environmental protection. Meanwhile, the switch equipment adopting SF6 as an insulating medium is relatively large in size, high in requirement on sealing performance of the air box, high in process difficulty and manufacturing cost and difficult and complex to detect and maintain.

Disclosure of Invention

The invention aims to provide a 40.5kV solid insulation switch cabinet which has the advantages of compact structure, easiness in preparation, convenience in disassembly and assembly, small occupied space, safety and reliability.

In order to solve the problems in the prior art, the invention provides a 40.5kV solid insulation switch cabinet, which comprises a cabinet body and three groups of solid insulation switches arranged in the cabinet body, wherein each solid insulation switch comprises a circuit breaker and an isolation switch; the circuit breaker comprises an incoming line connecting piece, a vacuum arc extinguishing piece and an insulating pull rod, wherein the incoming line connecting piece comprises a first insulating cylinder and an incoming line contact base arranged in the first insulating cylinder, a first connecting column which is connected with the incoming line contact base into a whole and extends out of the first insulating cylinder is arranged on the lower side of the incoming line contact base, the vacuum arc extinguishing piece comprises a second insulating cylinder, a vacuum arc extinguishing chamber, an arc extinguishing upper contact base and an arc extinguishing lower contact base, the vacuum arc extinguishing piece is arranged in the second insulating cylinder, the vacuum arc extinguishing chamber, the arc extinguishing upper contact base and the arc extinguishing lower contact base are arranged in positions, corresponding to the arc extinguishing lower contact base, of the second insulating cylinder, an inner taper sleeve head facing an isolating switch is arranged; the upper end of the first insulating cylinder is fixed on an upper insulating plate of the cabinet body through a flange, the upper end of the second insulating cylinder is connected with the lower end of the first insulating cylinder through a flange and enables a first connecting column to be connected with an upper arc extinguishing contact seat, the lower end of the second insulating cylinder is fixed on a lower insulating plate of the cabinet body through a flange, the upper end of the insulating pull rod is connected with a moving contact of a vacuum arc extinguishing chamber, and the lower end of the insulating pull rod is connected with a circuit breaking mechanism through a transmission device; the isolating switch comprises an outgoing line connecting piece, an isolating connecting piece, an extension piece and a fixing piece, wherein the outgoing line connecting piece comprises a third insulating cylinder and an outgoing line contact seat arranged in the third insulating cylinder, an outgoing line terminal which is connected with the outgoing line contact seat into a whole and extends out of the third insulating cylinder is arranged on the lower side of the outgoing line contact seat, the isolating connecting piece comprises a fourth insulating cylinder and an isolating contact seat arranged in the fourth insulating cylinder, the isolating contact seat is provided with a second connecting column which is connected with the isolating contact seat into a whole and extends out of the fourth insulating cylinder, the extension piece comprises a fifth insulating cylinder, the fixing piece comprises a sixth insulating cylinder, the third insulating cylinder, the fourth insulating cylinder, the fifth insulating cylinder and the sixth insulating cylinder are sequentially connected through flanges from bottom to top, the upper end of the sixth insulating cylinder is fixed on the upper insulating plate through a flange, and the second connecting column extends into the inner cone sleeve head and is connected with the arc-extinguishing; the isolating switch also comprises a hollow conducting rod and a lead screw for driving the conducting rod to move up and down, the upper end of the conducting rod is coaxially fixed with a nut matched with the lead screw, and the upper end of the lead screw is connected with the isolating mechanism through a gear box; when the isolating switch is switched on, the upper end and the lower end of the conducting rod are correspondingly connected with the isolating contact seat and the outgoing line contact seat.

Further, the 40.5kV solid insulation switch cabinet comprises a lower arc-extinguishing contact base, wherein the lower arc-extinguishing contact base comprises a contact base main body, the contact base main body is provided with a connecting sleeve which is connected with the contact base main body into a whole, a connecting block is arranged in an inner cavity of the contact base main body, two sides of the connecting block are respectively connected with the contact base main body through inverted U-shaped connecting pieces, the connecting block is provided with a conical groove with an upward opening and a large upper part and a small lower part, and a through hole is formed in the bottom of the conical groove; the lower end of a moving contact of the vacuum arc-extinguishing chamber penetrates through a through hole formed in the contact seat main body and is clamped in the conical groove, the upper end of the insulating pull rod penetrates through the through hole to be connected with the lower end of the moving contact of the vacuum arc-extinguishing chamber, and the second connecting column extends into the connecting sleeve and enables the connecting sleeve and the connecting sleeve to be connected.

Further, the 40.5kV solid insulation switch cabinet comprises a transmission device, wherein the transmission device comprises a supporting seat fixed on the lower side of a lower insulation plate, vertical strip-shaped holes are symmetrically formed in two side plates of the supporting seat, vertical sliding shafts are mounted on the two side plates of the supporting seat through the vertical strip-shaped holes, horizontal strip-shaped holes are symmetrically formed in the two side plates of the supporting seat on the lower side of the vertical strip-shaped holes, horizontal sliding shafts are mounted on the two side plates of the supporting seat through the horizontal strip-shaped holes, and a linkage plate is hinged between the horizontal sliding shafts and the vertical sliding shafts; the lower end of the insulating pull rod is hinged with the vertical sliding shaft, and the circuit breaking mechanism is hinged with the transverse sliding shaft through the transmission pull rod.

Further, the lower end of the insulating pull rod and the transmission pull rod are located between two side plates of the supporting seat, two linkage plates are arranged, the lower ends of the two linkage plates are correspondingly located between the transmission pull rod and the two side plates of the supporting seat, and the upper ends of the two linkage plates are correspondingly located between the lower end of the insulating pull rod and the two side plates of the supporting seat; the position of the vertical sliding shaft corresponding to the vertical strip-shaped hole and the position of the transverse sliding shaft corresponding to the transverse strip-shaped hole are respectively sleeved with a shaft sleeve.

Further, the 40.5kV solid insulation switch cabinet comprises a gear box fixed on an upper insulation plate, wherein a driving gear and three driven gears are sequentially arranged in the gear box, a transmission gear is arranged between the driving gear and the adjacent driven gears, a conversion gear is arranged between the adjacent driven gears, the driving gear is coaxially fixed with a transmission input shaft, and the driven gears are coaxially fixed with an insulation output shaft; the isolation mechanism is connected with the transmission input shaft through a bevel gear, and the upper end of a lead screw of the isolation switch is coaxially and fixedly connected with the insulation output shaft.

Further, the 40.5kV solid insulation switch cabinet is characterized in that the wire inlet contact base is provided with a first slot with an upward opening, the arc extinguishing upper contact base is provided with a second slot with an upward opening, the lower end of the first connecting column is positioned in the second slot, the wire outlet contact base is provided with a third slot with an upward opening, a first spring contact finger is installed on the peripheral wall of the third slot through a ring groove, the isolation contact base is provided with a through hole, and a second spring contact finger is installed on the peripheral wall of the through hole through the ring groove; when the isolating switch is switched on, the lower end of the conducting rod is connected with the outgoing line contact seat through the first spring contact finger, and the upper end of the conducting rod is connected with the isolating contact seat through the second spring contact finger.

Further, the 40.5kV solid insulation switch cabinet is characterized in that a cavity between the outgoing line contact seat and the isolation contact seat is an isolation cavity, a shielding device is arranged in the isolation cavity, the shielding device comprises a seventh insulation cylinder with a large middle and small two ends, and a high-voltage shielding net and a low-voltage shielding net which are arranged in a fifth insulation cylinder, an extreme contact seat connected with the high-voltage shielding net is arranged in the middle of the inner side of the high-voltage shielding net, a third spring contact finger is arranged on the peripheral wall of an inner hole of the extreme contact seat through a ring groove, a plurality of ground wire binding posts connected with the low-voltage shielding net are arranged in the middle of the outer side of the low-voltage shielding net along the circumferential direction, and the ground wire binding posts correspond to the connection positions of the third insulation; when the isolating switch is switched on, the conducting rod penetrates through the inner cavity of the seventh insulating cylinder and is connected with the extreme contact seat through the third spring contact finger.

Furthermore, the extension end of the first connecting column and the first insulating cylinder wrapped outside the first connecting column, the extension end of the second connecting column and the fourth insulating cylinder wrapped outside the second connecting column, and the extension end of the outgoing wiring terminal and the third insulating cylinder wrapped outside the second connecting column all form a conical sleeve structure.

Compared with the prior art, the 40.5kV solid insulation switch cabinet has the following advantages: the invention fixes the inlet wire connecting piece on the upper insulating plate through the flange at the upper end of the first insulating cylinder, connects the vacuum arc-extinguishing piece with the first insulating cylinder through the flange at the upper end of the second insulating cylinder, fixes the lower end of the second insulating cylinder on the lower insulating plate through the flange, the first connecting column is connected with the arc-extinguishing upper contact base, the static contact and the moving contact of the vacuum arc-extinguishing chamber are correspondingly connected with the arc-extinguishing upper contact base and the arc-extinguishing lower contact base, the upper end of the insulating pull rod is connected with the moving contact of the vacuum arc-extinguishing chamber, the lower end of the insulating pull rod is connected with the circuit breaking mechanism through a transmission device, and the second insulating cylinder is provided with an inner cone sleeve head used for connecting the isolating switch at the position corresponding to the arc extinguishing lower contact seat, therefore, the circuit breaker is simple in structure, convenient to disassemble and assemble, high in standardization degree, safe and reliable. Simultaneously, through setting up the connecting piece of being qualified for the next round of competitions that loops through flange joint from bottom to top, keep apart the connecting piece, extension piece and mounting, make the mounting pass through the flange and fix on last insulation board, make the second spliced pole stretch into in the interior conical sleeve head and be connected with the arc extinguishing lower touch seat, and at the connecting piece of being qualified for the next round of competitions, keep apart the connecting piece, set up hollow conducting rod and the lead screw that is used for driving the conducting rod and reciprocates in the inner chamber of extension piece and mounting, make the upper end of lead screw pass through the gear box and be connected with isolating mechanism, just constituted a simple structure from this, easy dismounting, the standardization level is high. In practical application, an incoming line is connected with an incoming line contact seat of an incoming line connecting piece, an outgoing line is connected with an outgoing line binding post of the outgoing line connecting piece, a moving contact of a vacuum arc-extinguishing chamber is driven by an insulating pull rod to move up and down, the purposes of opening and closing the circuit breaker can be achieved, and an arc-extinguishing function is achieved through the vacuum arc-extinguishing chamber; the conducting rod is driven by the lead screw to move up and down, so that the purposes of switching on and isolating the isolating switch can be achieved, namely, the upper end and the lower end of the conducting rod are in a switching-on state when correspondingly connected with the isolating contact seat and the outgoing line contact seat, and the lower end of the conducting rod is in an isolating state when far away from the outgoing line contact seat. The invention improves the safety and reliability through the combined structure design of the circuit breaker and the isolating switch; by adopting epoxy resin as an insulating medium for the circuit breaker and the isolating switch, an air box is not required to surround, and compared with switch equipment adopting SF6 insulation, the volume and the occupied space of the switch cabinet are reduced, and the process difficulty and the manufacturing cost of the switch cabinet are reduced; and through letting the circuit breaker set up inlet wire connecting piece and the vacuum arc extinguishing spare that adopts flange joint, let isolator set up outlet wire connecting piece, isolation connecting piece, extension piece and the mounting that adopts flange joint, realized the modular design of spare part, reduced the preparation technology degree of difficulty, improved the convenience of dismouting and maintenance.

The following describes a 40.5kV solid insulated switchgear in detail with reference to the embodiments shown in the drawings.

Drawings

FIG. 1 is an external front view of a 40.5kV solid insulated switchgear of the present invention;

FIG. 2 is an external perspective view of a 40.5kV solid insulated switchgear of the present invention;

FIG. 3 is an inside elevation view of a 40.5kV solid insulated switchgear of the present invention;

FIG. 4 is a first perspective view of the inside of a 40.5kV solid insulated switchgear of the present invention;

FIG. 5 is a second perspective view of the inside of a 40.5kV solid insulated switchgear of the present invention;

FIG. 6 is a front view of a solid insulated switch in a 40.5kV solid insulated switchgear of the present invention;

FIG. 7 is a left side view of a solid insulated switch in a 40.5kV solid insulated switchgear of the present invention;

FIG. 8 is a perspective view of a solid insulated switch in a 40.5kV solid insulated switchgear of the present invention;

FIG. 9 is a view taken along line A-A of FIG. 6;

fig. 10 is a partial cross-sectional view of a circuit breaker in a 40.5kV solid insulated switchgear of the present invention;

FIG. 11 is a partial cross-sectional view of a disconnector in a 40.5kV solid insulated switchgear of the present invention;

FIG. 12 is a front view of an arc extinguishing lower contact base in a 40.5kV solid insulated switchgear according to the present invention;

FIG. 13 is a view from the B-B direction in FIG. 12;

FIG. 14 is a left side view of an arc extinguishing lower contact base in a 40.5kV solid insulated switchgear according to the present invention;

FIG. 15 is a view taken along line C-C of FIG. 14;

FIG. 16 is a front view of a transmission device in a 40.5kV solid insulated switchgear of the present invention;

FIG. 17 is a top view of a transmission in a 40.5kV solid insulated switchgear of the present invention;

FIG. 18 is a bottom view of the transmission in a 40.5kV solid insulated switchgear of the present invention;

FIG. 19 is a first perspective view of a transmission device in a 40.5kV solid insulated switchgear of the present invention;

FIG. 20 is a second perspective view of a transmission device in a 40.5kV solid insulated switchgear of the present invention;

FIG. 21 is a view from direction D-D of FIG. 16;

FIG. 22 is a view from E-E in FIG. 16;

FIG. 23 is a front view of a gear box in a 40.5kV solid insulated switchgear of the present invention;

FIG. 24 is a perspective view of a gear box in a 40.5kV solid insulated switchgear of the present invention;

FIG. 25 is an internal perspective view of a gear box in a 40.5kV solid insulated switchgear of the present invention;

fig. 26 is a view from direction F-F in fig. 23.

Detailed Description

First, it should be noted that, the directional terms such as up, down, left, right, front, rear, etc. described in the present invention are only described with reference to the accompanying drawings for understanding, and are not intended to limit the technical solution and the claimed scope of the present invention.

As shown in fig. 1 to 26, the embodiment of the 40.5kV solid-insulated switchgear of the present invention includes a switchgear body and three sets of solid-insulated switches disposed in the switchgear body. The solid insulated switch is provided with a breaker 1 and a disconnector 2. The circuit breaker 1 is provided with an incoming connection 11, a vacuum arc-extinguishing member 12 and an insulating pull rod 13. The incoming line connector 11 is provided with a first insulating cylinder 111 and an incoming line contact base 112 disposed in the first insulating cylinder 111, and a first connecting post 113 integrally connected with the incoming line contact base 112 and extending out of the first insulating cylinder 111 is disposed at the lower side of the incoming line contact base 112. The vacuum arc-extinguishing member 12 is provided with a second insulating cylinder 121, a vacuum arc-extinguishing chamber 122, an arc-extinguishing upper contact seat 123 and an arc-extinguishing lower contact seat 124, which are arranged in the second insulating cylinder 121, so that the second insulating cylinder 121 is provided with an inner taper sleeve head 125 facing the isolating switch 2 at a position corresponding to the arc-extinguishing lower contact seat 124, and a fixed contact and a movable contact of the vacuum arc-extinguishing chamber 122 are correspondingly connected with the arc-extinguishing upper contact seat 123 and the arc-extinguishing lower contact seat 124. Let the upper end of the first insulating cylinder 111 fix on the upper insulating plate 3 of the cabinet through the flange, let the upper end of the second insulating cylinder 121 pass through the flange and be connected with the lower extreme of the first insulating cylinder 111 and make the first connector 113 be connected with the arc extinguishing upper contact base 123, let the lower extreme of the second insulating cylinder 121 pass through the flange and fix on the lower insulating plate 4 of the cabinet. The upper end of the insulating pull rod 13 is connected with the movable contact of the vacuum arc-extinguishing chamber 122, and the lower end of the insulating pull rod 13 is connected with the breaking mechanism 5 through the transmission device 14. The disconnector 2 is provided with a line outgoing connection 21, a disconnector connection 22, an extension 23 and a fixing 24. The outlet connector 21 is provided with a third insulating cylinder 211 and an outlet contact base 212 arranged in the third insulating cylinder 211, and an outlet terminal 213 integrally connected with the outlet contact base 212 and extending out of the third insulating cylinder 211 is arranged at the lower side of the outlet contact base 212. The isolation connector 22 is provided with a fourth insulation cylinder 221 and an isolation contact seat 222 disposed in the fourth insulation cylinder 221, and the isolation contact seat 222 is provided with a second connection post 223 integrally connected with the isolation contact seat and extending out of the fourth insulation cylinder 221. The extension 23 is provided with a fifth insulating cylinder 231, and the fixing member 24 is provided with a sixth insulating cylinder 241. The third insulating cylinder 211, the fourth insulating cylinder 221, the fifth insulating cylinder 231 and the sixth insulating cylinder 241 are sequentially connected through flanges from bottom to top, the upper end of the sixth insulating cylinder 241 is fixed on the upper insulating plate 3 through a flange, and the second connecting column 223 extends into the inner cone sleeve head 125 and is connected with the arc-extinguishing lower contact seat 124. The isolating switch 2 is provided with a hollow conducting rod 25 and a lead screw 26 for driving the conducting rod 25 to move up and down, a nut matched with the lead screw 26 is coaxially fixed at the upper end of the conducting rod 25, and the upper end of the lead screw 26 is connected with the isolating mechanism 7 through the gear box 6. When the isolating switch 2 is switched on, the upper end and the lower end of the conducting rod 25 are correspondingly connected with the isolating contact seat 222 and the outgoing line contact seat 212.

The 40.5kV solid insulation switch cabinet with the structure is compact in structure, easy to manufacture, convenient to disassemble and assemble, small in occupied space, safe and reliable. The invention sets the inlet wire connecting piece 11, the vacuum arc extinguishing piece 12 and the insulating pull rod 13, the inlet wire connecting piece 11 is fixed on the upper insulating plate 3 through the flange at the upper end of the first insulating cylinder 111, the vacuum arc extinguishing piece 12 is connected with the first insulating cylinder 111 through the flange at the upper end of the second insulating cylinder 121, the lower end of the second insulating cylinder 121 is fixed on the lower insulating plate 4 through the flange, the first connecting column 113 is connected with the upper arc extinguishing contact base 123, the fixed contact and the movable contact of the vacuum arc extinguishing chamber 122 are correspondingly connected with the upper arc extinguishing contact base 123 and the lower arc extinguishing contact base 124, the upper end of the insulating pull rod 13 is connected with the movable contact of the vacuum arc extinguishing chamber 122, the lower end of the insulating pull rod 13 is connected with the circuit breaking mechanism 5 through the transmission device 14, and the inner cone sleeve 125 for connecting the isolating switch 2 is arranged at the position of the second insulating cylinder 121 corresponding to the lower arc extinguishing contact base 124, thereby forming a simple, The circuit breaker is convenient to disassemble and assemble, high in standardization degree, safe and reliable. Meanwhile, the fixing piece 24 is fixed on the upper insulating plate 3 through the flange by arranging the outgoing line connecting piece 21, the isolating connecting piece 22, the extending piece 23 and the fixing piece 24 which are sequentially connected through the flange from bottom to top, the second connecting column 223 extends into the inner cone sleeve head 125 and is connected with the arc extinguishing lower contact seat 124, the hollow conducting rod 25 and the lead screw 26 used for driving the conducting rod to move up and down are arranged in the inner cavities of the outgoing line connecting piece 21, the isolating connecting piece 22, the extending piece 23 and the fixing piece 24, and the upper end of the lead screw 26 is connected with the isolating mechanism 7 through the gear box 6, so that the isolating switch with the advantages of simple structure, convenience in disassembly and assembly, high standardization degree, safety and reliability is formed. In practical application, the incoming line 8 is connected with the incoming line contact base 112 of the incoming line connecting piece 11, the outgoing line 9 is connected with the outgoing line binding post 213 of the outgoing line connecting piece 21, the moving contact of the vacuum arc-extinguishing chamber 122 is driven to move up and down through the insulating pull rod 13, the purposes of opening and closing the circuit breaker can be achieved, and the arc-extinguishing function is achieved through the vacuum arc-extinguishing chamber 122; the purpose of closing and isolating the isolating switch can be achieved by driving the conducting rod 25 to move up and down through the screw rod 26, that is, the upper end and the lower end of the conducting rod 25 are in a closing state when correspondingly connected with the isolating contact seat 222 and the outgoing contact seat 212, and the lower end of the conducting rod 25 is in an isolating state when far away from the outgoing contact seat 212. The safety reliability of the switch cabinet is improved through the combined structure design of the circuit breaker and the isolating switch; by adopting the epoxy resin as an insulating medium for the circuit breaker 1 and the isolating switch 2, the gas box is not required to surround, so that compared with switch equipment adopting SF6 insulation, the volume and the occupied space of the switch cabinet are reduced, and the process difficulty and the manufacturing cost of the switch cabinet are reduced; and through letting circuit breaker 1 set up the inlet wire connecting piece 11 and the vacuum arc extinguishing spare 12 that adopt flange joint, let isolator 2 set up the outlet wire connecting piece 21 that adopts flange joint, keep apart connecting piece 22, extension 23 and mounting 24, realized the modular design of spare part, reduced the preparation technology degree of difficulty, improved the convenience of dismouting and maintenance. In practical application, the first insulating cylinder 111, the second insulating cylinder 121, the third insulating cylinder 211, the fourth insulating cylinder 221, the fifth insulating cylinder 231, and the sixth insulating cylinder 241 are all made of epoxy resin; the circuit breaking mechanism 5 and the isolating mechanism 7 are common devices in the field, the circuit breaking mechanism is a circuit breaker operating mechanism and is used for operating a circuit breaker, and the isolating mechanism is an isolating switch operating mechanism and is used for operating an isolating switch, which is not described in detail herein.

As an optimized scheme, the present embodiment adopts the following structure for the arc extinguishing lower contact seat 124: including touching seat main part 1241, let touch seat main part 1241 set up rather than connecting sleeve 1242 as an organic whole, set up connecting block 1243 in touching seat main part 1241's inner chamber, make the both sides of connecting block 1243 be connected with touching seat main part 1241 through the U-shaped connecting piece 1244 of invering respectively, set up the opening up and be big-end-up's taper shaped groove 1245 on connecting block 1243, set up the clearing hole 1246 at the tank bottom of taper shaped groove 1245. The lower end of the moving contact of the vacuum arc-extinguishing chamber 122 is allowed to pass through the through hole of the contact seat main body 1241 and clamped in the tapered groove 1245, the upper end of the insulating pull rod 13 is allowed to pass through the through hole 1246 to be connected with the lower end of the moving contact of the vacuum arc-extinguishing chamber 122, and the second connecting column 223 is allowed to extend into the connecting sleeve 1242 and connect the two. The structure is arranged on the basis that the movable contact of the vacuum arc-extinguishing chamber 122, the arc-extinguishing lower contact seat 124 and the insulating pull rod 13 are simultaneously connected, and the connection stability and the action reliability are ensured through the elastic deformation capacity of the U-shaped connecting piece 1244. It should be noted that, in practical applications, the lower half of the U-shaped connecting member 1244 is usually connected to the contact body 1241 to enhance its elastic deformation capability.

As an optimized solution, the present embodiment adopts the following structure for the transmission 14: including fixing at the supporting seat 141 of insulating board 4 downside down, let both sides board of supporting seat 141 set up the vertical bar hole 142 of symmetric distribution, make both sides board of supporting seat 141 pass through vertical bar hole 142 and install vertical sliding shaft 143, and let both sides board of supporting seat 141 set up the horizontal bar hole 144 of symmetric distribution at the downside of vertical bar hole 142, make both sides board of supporting seat 141 pass through horizontal bar hole 144 and install horizontal sliding shaft 145, articulated interlock board 146 between horizontal sliding shaft 145 and vertical sliding shaft 143. The lower end of the insulating pull rod 13 is hinged with a vertical sliding shaft 143, and the circuit breaking mechanism 5 is hinged with a transverse sliding shaft 145 through a transmission pull rod 51. The transmission device 14 with the structure realizes the technical purpose of converting the horizontal motion of the transmission pull rod 51 into the vertical motion of the insulation pull rod 13 through the matching of the vertical strip-shaped hole 142 and the horizontal strip-shaped hole 144, has the advantages of simple structure, easy realization and sensitive action, can improve the structural compactness of the switch cabinet, and reduces the volume and the occupied space. In order to enhance the structural stability and the motion sensitivity, in the present embodiment, the lower end of the insulating pull rod 13 and the transmission pull rod 51 are both located between the two side plates of the supporting seat 141, and two linking plates 146 are provided, so that the lower ends of the two linking plates 146 are correspondingly located between the transmission pull rod 51 and the two side plates of the supporting seat 141, and the upper ends of the two linking plates 146 are correspondingly located between the lower end of the insulating pull rod 13 and the two side plates of the supporting seat 141. And the vertical sliding shaft 143 and the horizontal sliding shaft 145 are respectively sleeved with a shaft sleeve 147 at the position corresponding to the vertical strip-shaped hole 142 and the horizontal strip-shaped hole 144.

As a specific embodiment, the present invention adopts the following structure for the gear box 6: the transmission device comprises a box body 61 fixed on an upper insulating plate 3, a driving gear 62 and three driven gears 63 are sequentially arranged in the box body 61, a transmission gear 64 is arranged between the driving gear 62 and the adjacent driven gears 63, a conversion gear 65 is arranged between the adjacent driven gears 63, the driving gear 62 is coaxially fixed on a transmission input shaft 66, and the driven gears 63 are coaxially fixed on an insulating output shaft 67. The isolating mechanism 7 is connected with a transmission input shaft 66 through a bevel gear, and the upper end of a lead screw 26 of the isolating switch 2 is coaxially and fixedly connected with an insulated output shaft 67. The gear box 6 with the structure has the characteristics of simple structure, sensitive action and good synchronism. It should be noted that, in practical applications, the driving gear 62, the driven gear 63, the transmission gear 64 and the conversion gear 65 are usually clamped in the box 61 through bearings and mounting seats, respectively, so as to improve convenience of assembly, disassembly and maintenance, but not limited thereto.

As a specific embodiment, the present invention provides the inlet contact base 112 with a first slot with an upward opening, and inserts the lower end of the inlet wire 8 into the first slot, and provides the arc extinguishing upper contact base 123 with a second slot with an upward opening, and positions the lower end of the first connecting post 113 in the second slot, so as to improve the reliability of connection. Meanwhile, the invention makes the outgoing line contact seat 212 provided with a third slot with an upward opening, and the first spring contact finger 214 installed on the peripheral wall of the third slot through a ring slot, makes the isolation contact seat 222 provided with a through hole, and installs the second spring contact finger 224 on the peripheral wall of the through hole through a ring slot. When the isolating switch is switched on, the lower end of the conducting rod 25 is connected with the outgoing line contact seat 212 through the first spring contact finger 214, and the upper end of the conducting rod 25 is connected with the isolating contact seat 222 through the second spring contact finger 224. This structural arrangement improves the reliability of the connection of the conductive rod 25 to the outlet contact block 212 and the isolation contact block 222 by the first spring contact finger 214 and the second spring contact finger 224. In a specific embodiment, the cavity between the outgoing line contact seat 212 and the isolation contact seat 222 is an isolation cavity, and in order to enhance the insulation performance and the safety reliability of the connection position of the outgoing line connector 21 and the isolation connector 22, the shielding device 27 is arranged in the isolation cavity. The shielding device 27 specifically includes a seventh insulating cylinder 271 having a large middle and two small ends, and a high-voltage shielding mesh 272 and a low-voltage shielding mesh 273 in the seventh insulating cylinder 271. An extreme contact seat 274 connected with the high-voltage shielding net 272 is arranged in the middle of the inner side of the high-voltage shielding net 272, a third spring contact finger 275 is installed on the peripheral wall of an inner hole of the extreme contact seat 274 through a ring groove, a plurality of ground wire terminals 276 connected with the low-voltage shielding net 273 are arranged in the middle of the outer side of the low-voltage shielding net 273 along the circumferential direction, and the ground wire terminals 276 correspond to the connection positions of the third insulating cylinder 211 and the fourth insulating cylinder 221. When the isolating switch 2 is switched on, the conducting rod 25 is passed through the inner cavity of the seventh insulating cylinder 271 and is connected to the extreme contact seat 274 through the third spring contact finger 275. The gap at the junction of the third insulating cylinder 211 and the fourth insulating cylinder 221 can be well shielded by the shielding device 27.

It should be noted that, in practical applications, the protruding end of the first connection post 113 and the first insulation cylinder 111 wrapped outside thereof, the protruding end of the second connection post 223 and the fourth insulation cylinder 221 wrapped outside thereof, and the protruding end of the outgoing line post 213 and the third insulation cylinder 211 wrapped outside thereof are generally made into a tapered sleeve structure, so as to improve convenience of connection and adaptability to the connection component.

The above examples are only for describing the preferred embodiments of the present invention, and do not limit the scope of the claimed invention, and various modifications made by those skilled in the art according to the technical solutions of the present invention should fall within the scope of the invention defined by the claims without departing from the design concept of the present invention.

Claims

1. A40.5 kV solid insulation switch cabinet comprises a cabinet body and three groups of solid insulation switches arranged in the cabinet body, and is characterized in that the solid insulation switches comprise circuit breakers (1) and isolating switches (2); the circuit breaker (1) comprises an incoming line connecting piece (11), a vacuum arc extinguishing piece (12) and an insulating pull rod (13), the incoming line connecting piece (11) comprises a first insulating cylinder (111) and an incoming line contact seat (112) arranged in the first insulating cylinder (111), a first connecting column (113) which is connected with the incoming line contact seat (112) into a whole and extends out of the first insulating cylinder (111) is arranged at the lower side of the incoming line contact seat (112), the vacuum arc extinguishing part (12) comprises a second insulating cylinder (121), a vacuum arc extinguishing chamber (122), an arc extinguishing upper contact seat (123) and an arc extinguishing lower contact seat (124) which are arranged in the second insulating cylinder (121), an inner taper sleeve head (125) facing the isolating switch (2) is arranged at the position, corresponding to the arc extinguishing lower contact seat (124), of the second insulating cylinder (121), and a static contact and a moving contact of the vacuum arc extinguishing chamber (122) are correspondingly connected with the arc extinguishing upper contact seat (123) and the arc extinguishing lower contact seat (124); the upper end of the first insulating cylinder (111) is fixed on an upper insulating plate (3) of the cabinet body through a flange, the upper end of the second insulating cylinder (121) is connected with the lower end of the first insulating cylinder (111) through a flange and enables the first connecting column (113) to be connected with an arc extinguishing upper contact seat (123), the lower end of the second insulating cylinder (121) is fixed on a lower insulating plate (4) of the cabinet body through a flange, the upper end of the insulating pull rod (13) is connected with a moving contact of the vacuum arc extinguishing chamber (122), and the lower end of the insulating pull rod (13) is connected with a circuit breaking mechanism (5) through a transmission device (14); the isolating switch (2) comprises an outgoing line connecting piece (21), an isolating connecting piece (22), an extension piece (23) and a fixing piece (24), wherein the outgoing line connecting piece (21) comprises a third insulating cylinder (211) and an outgoing line contact seat (212) arranged in the third insulating cylinder (211), the lower side of the outgoing line contact seat (212) is provided with an outgoing line binding post (213) which is connected with the outgoing line contact seat (212) into a whole and extends out of the third insulating cylinder (211), the isolating connecting piece (22) comprises a fourth insulating cylinder (221) and an isolating contact seat (222) arranged in the fourth insulating cylinder (221), the isolating contact seat (222) is provided with a second connecting post (223) which is connected with the isolating contact seat into a whole and extends out of the fourth insulating cylinder (221), the extension piece (23) comprises a fifth insulating cylinder (231), the fixing piece (24) comprises a sixth insulating cylinder (241), the third insulating cylinder (211), the fourth insulating cylinder (221), the fifth insulating cylinder (231) and the sixth insulating cylinder (241) are connected through flanges from bottom to top, the upper end of a sixth insulating cylinder (241) is fixed on the upper insulating plate (3) through a flange, and a second connecting column (223) extends into the inner cone sleeve head (125) and is connected with the arc-extinguishing lower contact seat (124); the isolating switch (2) further comprises a hollow conducting rod (25) and a lead screw (26) used for driving the conducting rod (25) to move up and down, a nut matched with the lead screw (26) is coaxially fixed at the upper end of the conducting rod (25), and the upper end of the lead screw (26) is connected with an isolating mechanism (7) through a gear box (6); when the isolating switch (2) is switched on, the upper end and the lower end of the conducting rod (25) are correspondingly connected with the isolating contact seat (222) and the outgoing line contact seat (212).

2. The 40.5kV solid insulated switchgear according to claim 1, wherein the arc extinguishing lower contact base (124) comprises a contact base main body (1241), the contact base main body (1241) is provided with a connecting sleeve (1242) connected with the contact base main body into a whole, a connecting block (1243) is arranged in an inner cavity of the contact base main body (1241), two sides of the connecting block (1243) are respectively connected with the contact base main body (1241) through an inverted U-shaped connecting piece (1244), the connecting block (1243) is provided with a tapered groove (1245) with an upward opening and a large upper part and a small lower part, and a through hole (1246) is formed in the groove bottom of the tapered groove (1245); the lower end of a moving contact of the vacuum arc-extinguishing chamber (122) penetrates through a through hole formed in the contact seat main body (1241) and is clamped in the tapered groove (1245), the upper end of the insulating pull rod (13) penetrates through the through hole (1246) to be connected with the lower end of the moving contact of the vacuum arc-extinguishing chamber (122), and the second connecting column (223) extends into the connecting sleeve (1242) and enables the connecting sleeve and the connecting sleeve to be connected.

3. The 40.5kV solid insulation switch cabinet according to claim 2, wherein the transmission device (14) comprises a support seat (141) fixed on the lower side of the lower insulation plate (4), two side plates of the support seat (141) are provided with vertical strip-shaped holes (142) which are symmetrically distributed, two side plates of the support seat (141) are provided with vertical sliding shafts (143) through the vertical strip-shaped holes (142), two side plates of the support seat (141) are further provided with horizontal strip-shaped holes (144) which are symmetrically distributed on the lower side of the vertical strip-shaped holes (142), two side plates of the support seat (141) are provided with horizontal sliding shafts (145) through the horizontal strip-shaped holes (144), and a linkage plate (146) is hinged between the horizontal sliding shafts (145) and the vertical sliding shafts (143); the lower end of the insulating pull rod (13) is hinged with the vertical sliding shaft (143), and the circuit breaking mechanism (5) is hinged with the transverse sliding shaft (145) through the transmission pull rod (51).

4. The 40.5kV solid insulation switch cabinet according to claim 3, wherein the lower end of the insulation pull rod (13) and the transmission pull rod (51) are both positioned between two side plates of the supporting seat (141), two linkage plates (146) are provided, the lower ends of the two linkage plates (146) are correspondingly positioned between the transmission pull rod (51) and the two side plates of the supporting seat (141), and the upper ends of the two linkage plates (146) are correspondingly positioned between the lower end of the insulation pull rod (13) and the two side plates of the supporting seat (141); the position of the vertical sliding shaft (143) corresponding to the vertical strip-shaped hole (142) and the position of the transverse sliding shaft (145) corresponding to the transverse strip-shaped hole (144) are respectively sleeved with a shaft sleeve (147).

5. The 40.5kV solid insulation switch cabinet according to claim 4, wherein the gear box (6) comprises a box body (61) fixed on the upper insulation board (3), a driving gear (62) and three driven gears (63) are sequentially arranged in the box body (61), a transmission gear (64) is arranged between the driving gear (62) and the adjacent driven gear (63), a conversion gear (65) is arranged between the adjacent driven gears (63), a transmission input shaft (66) is coaxially fixed on the driving gear (62), and an insulation output shaft (67) is coaxially fixed on the driven gear (63); the isolating mechanism (7) is connected with the transmission input shaft (66) through a bevel gear, and the upper end of a lead screw (26) of the isolating switch (2) is coaxially and fixedly connected with an insulating output shaft (67).

6. The 40.5kV solid insulation switch cabinet according to claim 5, wherein the incoming contact base (112) is provided with a first slot with an upward opening, the arc extinguishing upper contact base (123) is provided with a second slot with an upward opening, the lower end of the first connecting column (113) is positioned in the second slot, the outgoing contact base (212) is provided with a third slot with an upward opening, a circumferential wall of the third slot is provided with a first spring contact finger (214) through a ring groove, the isolation contact base (222) is provided with a through hole, and a circumferential wall of the through hole is provided with a second spring contact finger (224) through a ring groove; when the isolating switch is switched on, the lower end of the conducting rod (25) is connected with the outgoing line contact seat (212) through the first spring contact finger (214), and the upper end of the conducting rod (25) is connected with the isolating contact seat (222) through the second spring contact finger (224).

7. The 40.5kV solid insulation switch cabinet according to claim 6, wherein the cavity between the outgoing line contact seat (212) and the isolation contact seat (222) is an isolation cavity, a shielding device (27) is arranged in the isolation cavity, the shielding device (27) comprises a seventh insulation cylinder (271) with a large middle and small two ends, and a high-voltage shielding net (272) and a low-voltage shielding net (273) which are arranged in the seventh insulation cylinder (271), the middle part of the inner side of the high-voltage shielding net (272) is provided with an extreme contact seat (274) connected with the high-voltage shielding net, the peripheral wall of the inner hole of the extreme contact seat (274) is provided with a third spring contact finger (275) through a ring groove, the middle part of the outer side of the low-voltage shielding net (273) is provided with a plurality of ground wire terminals (276) connected with the high-voltage shielding net along the circumferential direction, and the ground wire terminals (276) correspond to the connection positions of the third insulation cylinder (211); when the isolating switch (2) is switched on, the conducting rod (25) penetrates through the inner cavity of the seventh insulating cylinder (271) and is connected with the extreme contact seat (274) through the third spring contact finger (275).

8. A40.5 kV solid insulation switch cabinet according to any one of claims 1 to 7, wherein the protruding end of the first connecting column (113) and the first insulation cylinder (111) wrapped outside the first connecting column, the protruding end of the second connecting column (223) and the fourth insulation cylinder (221) wrapped outside the second connecting column, the protruding end of the outgoing line binding column (213) and the third insulation cylinder (211) wrapped outside the second connecting column form a tapered sleeve structure.