CN112490923B - Compact high-voltage switch cabinet for transformer substation - Google Patents
Compact high-voltage switch cabinet for transformer substation Download PDFInfo
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- CN112490923B CN112490923B CN202011422357.0A CN202011422357A CN112490923B CN 112490923 B CN112490923 B CN 112490923B CN 202011422357 A CN202011422357 A CN 202011422357A CN 112490923 B CN112490923 B CN 112490923B
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- load switch
- arc extinguishing
- isolating
- knife
- fixed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/005—Electrical connection between switchgear cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0352—Gas-insulated switchgear for three phase switchgear
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/075—Earthing arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a compact high-voltage switch cabinet for a transformer substation, which comprises a cabinet body, a first load switch, a second load switch and a fuse, wherein the first load switch, the second load switch and the fuse are arranged in the cabinet body, insulating gas is filled in the cabinet body, a first outgoing line sleeve, a second outgoing line sleeve and an incoming line sleeve are arranged on the cabinet body, the first outgoing line sleeve is connected with the output end of the fuse, the input end of the fuse is connected with the output end of the first load switch, the second outgoing line sleeve is connected with the output end of the second load switch, and the incoming line sleeve is respectively connected with the input end of the first load switch and the input end of the second load switch. The first load switch, the second load switch and the fuse are arranged in the same cabinet, the first load switch and the fuse are combined for use, the second load switch is used for standby in an emergency, two common and standby power supply loops are formed, the requirement of sectional overhaul is met, uninterrupted continuous power supply is realized, the power supply stability is improved, and the power supply device has the advantages of safety, reliability and small size.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a compact high-voltage switch cabinet for a transformer substation.
Background
Along with the continuous expansion of urban construction scale, the country is deeply transformed into urban and rural power grids, and high voltage is required to directly enter a load center, so that a power supply pattern of high-voltage power reception, transformer substation voltage reduction and low-voltage power distribution is formed. Compact products with small size and small occupied area become the direction of power supply and distribution development. In order to meet the requirements of power supply and distribution development directions, box transformer high-voltage side equipment in the prior art often adopts an HXGH-10 series air ring main unit or a ZN series column switch. The former uses ring network to supply power, but has large volume and large occupied area, and is not beneficial to being installed in limited space environments such as streets; the latter has the disadvantage that the sectional overhaul can not be completed in the non-looped network power supply scheme although the volume is small, and the requirements of the market on product miniaturization and sectional overhaul in the case of high-voltage side faults can not be met.
Disclosure of Invention
The invention aims to provide a compact high-voltage switch cabinet for a transformer substation, which meets the requirement of sectional overhaul, continuously supplies power, is stable and reliable in power supply and has small volume.
In order to solve the problems in the prior art, the compact high-voltage switch cabinet system for the transformer substation comprises a cabinet body, a first load switch, a second load switch and a fuse, wherein the first load switch, the second load switch and the fuse are arranged in the cabinet body, insulating gas is filled in the cabinet body, a first outgoing line sleeve, a second outgoing line sleeve and a incoming line sleeve are arranged on the cabinet body, the first outgoing line sleeve is connected with the output end of the fuse, the input end of the fuse is connected with the output end of the first load switch, the second outgoing line sleeve is connected with the output end of the second load switch, and the incoming line sleeve is connected with the input end of the first load switch and the input end of the second load switch respectively.
Furthermore, the first load switch and the second load switch have the same structure, the first load switch comprises two first support plates which are distributed at intervals, a first isolating shaft, a first upper insulating piece and a first lower insulating piece are arranged between the two first support plates, three groups of first isolating knife assemblies which are distributed at intervals are arranged on the first isolating shaft, a first input touch seat which is distributed corresponding to the first isolating knife assemblies is fixed on the first upper insulating piece, a first arc extinguishing device is arranged on the first input touch seat, a first output touch seat which is distributed corresponding to the first isolating knife assemblies is fixed on the first lower insulating piece, the second load switch comprises two second support plates which are distributed at intervals, a second isolating shaft, a second upper insulating piece and a second lower insulating piece are arranged between the two second support plates, three groups of second isolating knife assemblies which are distributed at intervals are arranged on the second isolating shaft, a second input touch seat which is fixed on the second upper insulating piece and corresponds to the second input touch seat which is distributed corresponding to the second isolating knife assemblies, and the second input touch seat which is fixed on the second upper insulating piece.
Furthermore, the invention relates to a compact high-voltage switch cabinet for a transformer substation, wherein three first wire outlet sleeves, three second wire outlet sleeves, three wire inlet sleeves and three fuses are respectively arranged, the first wire outlet sleeves are connected with the output ends of the fuses in a one-to-one correspondence manner, the input ends of the fuses are connected with first output contact bases in a one-to-one correspondence manner, the second wire outlet sleeves are connected with second output contact bases in a one-to-one correspondence manner, and the wire inlet sleeves are connected with the first input contact bases in a one-to-one correspondence manner and are connected with the second input contact bases in a one-to-one correspondence manner.
Further, the invention relates to a compact high-voltage switch cabinet for a transformer substation, wherein the first isolation knife assembly comprises a first crank arm, a first arc-shaped connecting piece, a first knife holder and a first knife board, the first crank arm is fixed on a first isolation shaft, one end of the first arc-shaped connecting piece is connected with the first crank arm through a hinge, the other end of the first arc-shaped connecting piece is connected with the first knife holder through the hinge, a first through hole is formed in the middle of the first knife holder, the first knife board is fixed in the first through hole of the first knife holder through a first knife board pin shaft, one end of the first knife board is tightly pressed through a first disc spring assembly, the other end of the first knife board is hinged with a first input contact seat, the second isolation knife assembly comprises a second crank arm, a second arc-shaped connecting piece, a second knife holder and a second knife board, the second crank arm is fixed on the second isolation shaft, one end of the second arc-shaped connecting piece is connected with the second knife holder through the hinge, the other end of the second arc-shaped connecting piece is connected with the first knife holder through the hinge, the other end of the second knife board is connected with the second knife holder through the first through the hinge, the middle of the second knife board is provided with the second through a second disc spring assembly, and the second knife board is fixedly connected with the second through hole.
Further, the invention relates to a compact high-voltage switch cabinet for a transformer substation, wherein a first arc-extinguishing device comprises a first arc-extinguishing gate installation seat and a plurality of first arc-extinguishing gate sheets, one end of the first arc-extinguishing gate installation seat is fixed on a first input touch seat, the other end of the first arc-extinguishing gate installation seat extends leftwards to form a columnar first installation part, a plurality of first installation grooves are formed in the lower side of the first installation part at equal intervals from left to right, the plurality of first arc-extinguishing gate sheets are correspondingly fixed in the first installation grooves one by one, a first groove is formed in the middle of the lower side of the first arc-extinguishing gate sheets, one end of the second arc-extinguishing gate installation seat is fixed on a second input touch seat, the other end of the second arc-extinguishing gate installation seat extends leftwards to form a columnar second installation part, a plurality of second installation grooves are formed in the lower side of the second installation part at equal intervals from left to right, the plurality of second arc-extinguishing gate sheets are correspondingly fixed in the second installation grooves one by one, and the middle of the second arc-extinguishing gate sheets are arranged in the lower side of the second arc-extinguishing gate sheets.
Furthermore, the compact high-voltage switch cabinet for the transformer substation is characterized in that a first grounding contact seat which is distributed corresponding to the first isolation knife assembly is arranged on the first lower insulating piece, a second grounding contact seat which is distributed corresponding to the second isolation knife assembly is arranged on the second lower insulating piece, and a grounding copper bar fixed on the cabinet body is connected between the first grounding contact seat and the second grounding contact seat.
Furthermore, the compact high-voltage switch cabinet for the transformer substation further comprises a safety protection device, wherein the safety protection device is connected with the first isolation shaft through the linkage assembly, and when the first load switch is grounded, the safety protection device is driven to ground the output end of the fuse.
Further, the invention relates to a compact high-voltage switch cabinet for a transformer substation, wherein the safety protection device comprises a grounding rack, a grounding isolation shaft and grounding cutters, the grounding rack is fixed on the inner side wall of a cabinet body at the rear side of a fuse, the grounding isolation shaft is rotatably arranged at the front side of the grounding rack, three groups of grounding cutters which are distributed at intervals are arranged on the grounding isolation shaft, the upper ends of the three grounding cutters are respectively connected with the grounding rack through soft connection, and three third grounding contact seats corresponding to the grounding cutters are arranged at the rear side of the grounding isolation shaft and are connected to the output end of the fuse through copper bars.
Further, the invention relates to a compact high-voltage switch cabinet for a transformer substation, wherein the linkage assembly comprises a swing arm, a push-pull rod, a first linkage arm, a second linkage arm and a third linkage arm, one end of the swing arm is fixed at the rear end of a first isolating shaft, the other end of the swing arm is connected with the lower end of the push-pull rod through a first pin shaft, the upper end of the push-pull rod is connected with the lower end of the first linkage arm through a second pin shaft, the upper end of the first linkage arm is connected with the lower end of the second linkage arm through a third pin shaft, the upper end of the second linkage arm is connected with the lower end of the third linkage arm through a fourth pin shaft, the upper end of the third linkage arm is fixed on the left side of a grounding isolation shaft, a first guide hole and a second guide hole which are arranged forwards and backwards in the up-down direction are arranged on the left side wall of the grounding frame, the second guide hole is positioned at the front side of the first guide hole, the second guide hole is gradually inclined towards the extending direction of the first guide hole from bottom to top, the second pin shaft slides in the first guide hole, and the third pin shaft slides in the second guide hole.
Furthermore, the invention relates to a compact high-voltage switch cabinet for a transformer substation, wherein the first isolating shaft and the second isolating shaft are respectively connected with a first operating mechanism and a second operating mechanism.
Compared with the prior art, the compact high-voltage switch cabinet for the transformer substation has the following advantages: the invention comprises a cabinet body, a first load switch, a second load switch and a fuse, wherein the first load switch, the second load switch and the fuse are arranged in the cabinet body, insulating gas is filled in the cabinet body, a first outgoing line sleeve, a second outgoing line sleeve and an incoming line sleeve are arranged on the cabinet body, the first outgoing line sleeve is connected with the output end of the fuse, the input end of the fuse is connected with the output end of the first load switch, the second outgoing line sleeve is connected with the output end of the second load switch, and the incoming line sleeve is respectively connected with the input end of the first load switch and the input end of the second load switch. When in actual use, the first load switch and the fuse form a common combined electrical appliance, and the second load switch is in a normally open state for emergency use. Under normal conditions, the first load switch is used for realizing power transmission and distribution, the fuse is used for rapidly cutting off short-circuit faults, further expansion of harm is avoided, and safe operation of a power supply line is ensured; when the power transmission loop controlled by the first load switch fails, the power transmission loop can be rapidly switched to the second load switch, and the second load switch completes power transmission and distribution, so that the annular continuous power supply function is realized. A one-in two-out power transmission scheme is formed, and when the high-voltage side of the transformer substation fails, sectional maintenance can be performed; the first load switch, the second load switch and the fuse are arranged in the same cabinet, so that the whole structure volume is reduced, and the device is convenient to use in an environment with limited installation space; the safety protection device is arranged, so that the safety of the operation of the switch cabinet is ensured.
The compact high-voltage switch cabinet for the transformer substation is further described in detail below with reference to the specific embodiments shown in the drawings:
drawings
Fig. 1 is a perspective view of a compact high-voltage switchgear for a transformer substation according to the present invention;
fig. 2 is a bottom view of a compact high-voltage switchgear for a transformer substation according to the present invention;
FIG. 3 is a block diagram of a compact high voltage switchgear for a substation of the present invention with the front, upper and right side walls of the switchgear removed;
FIG. 4 is a front view of a compact high voltage switchgear for a substation of the present invention with the front, upper and right side walls of the cabinet removed;
FIG. 5 is a schematic diagram of a first isolation knife assembly in a compact high voltage switchgear for a substation according to the present invention;
fig. 6 is a schematic structural diagram of a first arc extinguishing device in a compact high-voltage switch cabinet for a transformer substation according to the present invention;
FIG. 7 is a schematic diagram of a safety protection device in a compact high-voltage switchgear for a transformer substation;
fig. 8 is a schematic side view of a safety protection device in a compact high-voltage switch cabinet for a transformer substation.
Detailed Description
It should be noted that the terms of up, down, front, back, left, right and the like in the present invention are merely described according to the drawings, so as to facilitate understanding, and are not limited to the technical solution of the present invention and the scope of protection claimed. The room in the present invention should be understood in a broad sense, namely, an independent space or a plurality of spaces which are mutually communicated.
As shown in fig. 1 and fig. 2 in combination with fig. 3, a specific embodiment of a compact high-voltage switch cabinet for a transformer substation according to the present invention includes a cabinet body 1, a first load switch 2, a second load switch 3 and a fuse 4 disposed in the cabinet body 1, insulating gas is filled in the cabinet body 1, a first outgoing line sleeve 11, a second outgoing line sleeve 12 and an incoming line sleeve 13 are installed on the cabinet body 1, the first outgoing line sleeve 11 is connected with an output end of the fuse 4, an input end of the fuse 4 is connected with an output end of the first load switch 2, the second outgoing line sleeve 12 is connected with an output end of the second load switch 3, and the incoming line sleeve 13 is connected with an input end of the first load switch 2 and an input end of the second load switch 3, respectively.
In actual use, the first load switch 2 and the fuse 4 form a common combined electrical appliance, and the second load switch 3 is in a normally open state for emergency use. Under normal conditions, the first load switch 2 is used for realizing power transmission and distribution, the fuse 4 is used for rapidly cutting off short-circuit faults, further expansion of harm is avoided, and safe operation of a power supply line is ensured; when the power transmission circuit controlled by the first load switch 2 fails, the power transmission circuit can be rapidly switched to the second load switch 3, and the second load switch 3 completes power transmission and distribution, so that the annular continuous power supply function is realized. A one-in two-out power transmission scheme is formed, and when the high-voltage side of the transformer substation fails, sectional maintenance can be performed; the first load switch 2, the second load switch 3 and the fuse 4 are arranged in the cabinet, and all electric parts are compactly installed through reasonable configuration, so that the volume of the cabinet body 1 is further reduced, and the cabinet is convenient to use in an environment with limited installation space.
As an optimization scheme, as shown in fig. 3 and 4, the present embodiment has the same structure of the first load switch 2 and the second load switch 3. The first load switch 2 includes two first support plates 21 that are distributed at intervals, a first isolating shaft 22, a first upper insulating member 23 and a first lower insulating member 24 are installed between the two first support plates 21, three groups of first isolating knife assemblies 25 that are distributed at intervals are installed on the first isolating shaft 22, a first input contact base 26 that is distributed corresponding to the first isolating knife assemblies 25 is fixed on the first upper insulating member 23, a first arc extinguishing device 27 is installed on the first input contact base 26, and a first output contact base 28 that is distributed corresponding to the first isolating knife assemblies 25 is fixed on the first lower insulating member 24.
The second load switch 3 comprises two second support plates 31 which are distributed at intervals, a second isolating shaft 32, a second upper insulating part 33 and a second lower insulating part 34 are arranged between the two second support plates 31, three groups of second isolating knife assemblies 35 which are distributed at intervals are arranged on the second isolating shaft 32, second input contact bases 36 which are distributed corresponding to the second isolating knife assemblies 35 are fixed on the second upper insulating part 33, second arc extinguishing devices 37 are arranged on the second input contact bases 36, and second output contact bases 38 which are distributed corresponding to the second isolating knife assemblies 35 are fixed on the second lower insulating part 34.
First and second operating mechanisms are connected to the first and second barrier shafts 22 and 32, respectively. The first lower insulating member 24 is provided with a first grounding contact seat 241 which is distributed corresponding to the first isolating knife assembly 25, the second lower insulating member 34 is provided with a second grounding contact seat 341 which is distributed corresponding to the second isolating knife assembly 35, and a grounding copper bar 5 fixed on the cabinet body 1 is connected between the first grounding contact seat 241 and the second grounding contact seat 341. The structure is arranged reasonably and orderly, and the structure of each part is more compact through the reasonable arrangement when the function of the electric appliance is realized, so that the volume of the cabinet body is further reduced.
By the above design, three-position operation of the standby first load switch 2 and the second load switch 3 can be realized. Taking the action of the first load switch 2 as an example for illustration, the specific three-station operation process is as follows: the first isolating shaft 22 is driven by the first operating mechanism to rotate so as to drive the first isolating blade assembly 25 to rotate, and when the first isolating blade assembly 25 rotates to the first grounding contact seat 241, the first isolating blade assembly is at the grounding position; when the first isolating blade assembly 25 rotates to the first input contact seat 26, the first isolating blade assembly 25 is at a closing position, and when the first isolating blade assembly 25 rotates to a position between the first grounding contact seat 241 and the first input contact seat 26, the first isolating blade assembly is at an isolating position; when the first isolating blade assembly 25 is turned from the closing position to the isolating position, the generated arc is cut off by the first arc extinguishing device 27, thereby realizing high-voltage breaking. The three-position operation process of the second load switch 3 is the same as that of the first load switch 2, and will not be described in detail here.
As an optimization scheme, as shown in fig. 1, 2 and 3 and in combination with fig. 4, in this embodiment, three first outgoing line bushings 11, second outgoing line bushings 12, incoming line bushings 13 and fuses 4 are respectively provided, the first outgoing line bushings 11 are connected in one-to-one correspondence with output ends of the fuses 4, input ends of the fuses 4 are connected in one-to-one correspondence with first output contact bases 28, the second outgoing line bushings 12 are connected in one-to-one correspondence with second output contact bases 38, and the incoming line bushings 13 are connected in one-to-one correspondence with first input contact bases 26 and connected in one-to-one correspondence with second input contact bases 36. Through the reasonable orderly connection of the components, the structure is more compact, the size is reduced, and the miniaturization and skid-mounted switch cabinet are realized.
As an optimization, as shown in fig. 3, 4 and in conjunction with fig. 5, the first isolation blade assembly 25 in this embodiment includes a first lever 251, a first arc-shaped connecting member 252, a first blade holder 253 and a first blade 254. The first crank arm 251 is fixed on the first isolating shaft 22, one end of the first arc-shaped connecting piece 252 is connected with the first crank arm 251 through a hinge, and the other end of the first arc-shaped connecting piece 252 is connected with the first tool apron 253 through a hinge. A first through hole 255 is formed in the middle of the first tool holder 253, the first knife board 254 is fixed in the first through hole 255 of the first tool holder 253 through a first knife board pin shaft 256, one end of the first knife board 254 is pressed tightly through a first disc spring assembly 257, and the other end of the first knife board 254 is hinged with the first input contact 26.
The second spacer cutter assembly 35 in this particular embodiment includes a second crank arm 351, a second arcuate connector 352, a second cutter seat 353, and a second cutter plate 354. The second crank arm 351 is fixed on the second isolating shaft 32, one end of the second arc-shaped connecting piece 352 is connected with the second crank arm 351 through a hinge, the other end of the second arc-shaped connecting piece 352 is connected with the second cutter seat 353 through a hinge, a second through hole 355 is formed in the middle of the second cutter seat 353, the second cutter plate 354 is fixed in the second through hole 355 of the second cutter seat 353 through a second cutter plate pin shaft 356, one end of the second cutter plate 354 is pressed through a second disc spring assembly 357, and the other end of the second cutter plate 354 is hinged with the second input contact seat 36.
Through the design, the first knife plate 254 in the first isolation knife assembly 25 and the second knife plate 354 in the second isolation knife assembly 35 are respectively and indirectly connected to the first isolation shaft 22 and the second isolation shaft 32, the rotation amplitude of the second knife plate is smaller than that of the design that the knife plates are directly arranged on the isolation shafts, the action amplitude is further reduced, the installation space is saved, and the size of the cabinet body is further reduced.
As an optimization scheme, as shown in fig. 3 and fig. 4 in combination with fig. 6, the first arc extinguishing device 27 in this embodiment includes a first arc extinguishing gate mounting seat 271 and a plurality of first arc extinguishing gate plates 272, one end of the first arc extinguishing gate mounting seat 271 is fixed on the first input contact seat 26, the other end of the first arc extinguishing gate mounting seat 271 extends leftwards to form a columnar first mounting portion 273, a plurality of first mounting grooves 274 are arranged on the lower side of the first mounting portion 273 from left to right at equal intervals, the plurality of first arc extinguishing gate plates 272 are fixed in the first mounting grooves 274 in a one-to-one correspondence manner, and a first groove 275 is arranged in the middle of the lower side of the first arc extinguishing gate plates 272. The second arc extinguishing device 37 in this embodiment includes a second arc extinguishing gate mount 371 and a plurality of second arc extinguishing gate pieces 372, and the one end of second arc extinguishing gate mount 371 is fixed on second input touch seat 36, and the other end of second arc extinguishing gate mount 371 extends left and forms columnar second installation department 373, and second installation department 373 downside is equipped with a plurality of second mounting grooves 374 from left to right equidistant, and a plurality of second arc extinguishing gate pieces 372 one-to-one are fixed in second mounting groove 374, and the downside middle part of second arc extinguishing gate piece 372 is equipped with second recess 375. Thus, a combined arc-extinguishing grid is formed, generated electric arcs are segmented and isolated until the electric arcs are extinguished, and the safety of on-off power is ensured.
As an optimization scheme, as shown in fig. 7 and 8, the embodiment further includes a safety protection device 6, where the safety protection device 6 is connected with the first isolating shaft 22 through the linkage assembly 7, and when the first load switch 2 is grounded, the safety protection device 6 is driven to ground the output end of the fuse 4.
The safety protection device 6 includes a grounding frame 61, a grounding isolation shaft 62 and grounding cutters 63, the grounding frame 61 is fixed on the inner side wall of the cabinet body 1 at the rear side of the fuse 4, the grounding isolation shaft 62 is rotatably installed at the front side of the grounding frame 61, three groups of grounding cutters 63 distributed at intervals are installed on the grounding isolation shaft 62, the upper ends of the three grounding cutters 63 are respectively connected with the grounding frame 61 through flexible connections 64, three third grounding contact seats 65 corresponding to the grounding cutters 63 are arranged at the rear side of the grounding isolation shaft 62, and the third grounding contact seats 65 are connected to the output end of the fuse 4 through copper bars.
The linkage assembly 7 comprises a swing arm 71, a push-pull rod 72, a first linkage arm 73, a second linkage arm 74 and a third linkage arm 75, one end of the swing arm 71 is fixed at the rear end of the first isolation shaft 22, the other end of the swing arm 71 is connected with the lower end of the push-pull rod 72 through a first pin shaft 76, the upper end of the push-pull rod 72 is connected with the lower end of the first linkage arm 73 through a second pin shaft 77, the upper end of the first linkage arm 73 is connected with the lower end of the second linkage arm 74 through a third pin shaft 78, the upper end of the second linkage arm 74 is connected with the lower end of the third linkage arm 75 through a fourth pin shaft 79, the upper end of the third linkage arm 75 is fixed at the left side of the ground isolation shaft 62, a first guide hole 611 and a second guide hole 612 which are arranged front and back in the up-down direction are arranged on the left side wall of the ground frame 61, the second guide hole 612 is located at the front of the first guide hole 611, the second guide hole 612 is gradually inclined towards the extending direction of the first guide hole 611 from bottom to top, the second pin shaft 77 slides in the first guide hole 611. The specific action process is as follows: when the first load switch 2 performs the grounding operation, the first isolating shaft 22 in the first load switch 2 rotates anticlockwise, the swing arm 71 is driven to rotate upwards, the push-pull rod 72 moves upwards under the guiding action of the second pin shaft 77 and the first guiding hole 611, meanwhile, the first linkage arm 73 and the second linkage arm 74 also move upwards under the guiding action of the third pin shaft 78 and the second guiding hole 612, at this time, the lower end of the third linkage arm 75 moves upwards, the grounding isolating shaft 62 is driven to rotate anticlockwise, and thus the lower end of the grounding knife 63 rotates backwards and contacts with the grounding knife 63, and the linkage grounding operation of the fuse 4 is completed. When the first load switch 2 is closed, the grounding blade 63 is separated from the third grounding contact 65, and the fuse 4 is normally cut into the power transmission circuit.
In the absence of the safety protection device 6, the input terminal of the fuse 4 is grounded while the output terminal of the fuse 4 is not reliably grounded when the first load switch 2 is operated to ground. Through the use of the above linkage components in this embodiment, the first load switch 2 drives the linkage assembly 7 to act simultaneously when performing the grounding operation, so that the grounding knife 63 is grounded, and the input end and the output end of the fuse 4 are grounded simultaneously, so that the safety of the electrical appliance structure is further ensured. The safety protection device 6 occupies an idle position in the cabinet body 1 above the broken fuse 4, the cabinet body 1 is not required to be expanded, the grounding operation of the fuse 4 is limited in the space of the grounding frame 61 through reasonable application of the linkage assembly 7, the structure is more compact, the installation space is saved, and the volume of the cabinet body is further reduced.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the claimed invention, and various modifications made by those skilled in the art according to the technical solution of the present invention should fall within the scope of the present invention as defined in the claims without departing from the spirit of the present invention.
Claims (7)
1. The utility model provides a compact high-voltage switch cabinet for transformer substation, its characterized in that includes the cabinet body (1) and sets up first load switch (2), second load switch (3) and fuse (4) in the cabinet body (1), fill insulating gas in the cabinet body (1), install first outgoing line sleeve (11), second outgoing line sleeve (12) and incoming line sleeve (13) on the cabinet body (1), first outgoing line sleeve (11) are connected with the output of fuse (4), and the input of fuse (4) is connected with the output of first load switch (2), second outgoing line sleeve (12) are connected with the output of second load switch (3), incoming line sleeve (13) are connected with the input of first load switch (2) and the input of second load switch (3) respectively, still include safety protection device (6), safety protection device (6) are connected with first isolation off-axis (22) through linkage subassembly (7), and when first load switch (2) ground connection device drives safety protection device (6) and fuse (62) ground connection device ground connection (61) are at the frame side of the safety device (61) and the safety device ground connection (61) of the safety device, the safety device is connected with the frame (61) on the frame side of the safety device ground connection (61), the ground isolation shaft (62) is rotatably arranged on the front side of the ground frame (61), three groups of ground knives (63) which are distributed at intervals are arranged on the ground isolation shaft (62), the upper ends of the three ground knives (63) are respectively connected with the ground frame (61) through soft connection (64), three third ground contact seats (65) corresponding to the ground knives (63) are arranged behind the side of the ground isolation shaft (62), the third ground contact seats (65) are connected to the output end of the fuse (4) through copper bars, the linkage assembly (7) comprises a swing arm (71), a push-pull rod (72), a first linkage arm (73), a second linkage arm (74) and a third linkage arm (75), one end of the swing arm (71) is fixed at the rear end of the first isolation shaft (22), the other end of the swing arm (71) is connected with the lower end of the push-pull rod (72) through a first pin shaft (76), the upper end of the lever (72) is connected with the lower end of the second linkage arm (74) through a second pin shaft (77), the upper end of the second linkage arm (74) is connected with the upper end of the second linkage arm (74) through a second pin shaft (73), the upper end of the third linkage assembly (75) is connected with the upper end of the third linkage arm (75) through a third linkage arm (75), the left side wall of the grounding frame (61) is provided with a first guide hole (611) and a second guide hole (612) which are arranged front and back along the up-down direction, the second guide hole (612) is positioned at the front side of the first guide hole (611), the second guide hole (612) is gradually inclined towards the extending direction of the first guide hole (611) from bottom to top, the second pin shaft (77) slides in the first guide hole (611), and the third pin shaft (78) slides in the second guide hole (612).
2. The compact high-voltage switch cabinet for the transformer substation according to claim 1, wherein the first load switch (2) and the second load switch (3) have the same structure, the first load switch (2) comprises two first support plates (21) which are distributed at intervals, a first isolating shaft (22), a first upper insulating member (23) and a first lower insulating member (24) are installed between the two first support plates (21), three groups of first isolating knife assemblies (25) which are distributed at intervals are installed on the first isolating shaft (22), first input contact bases (26) which are distributed corresponding to the first isolating knife assemblies (25) are fixed on the first upper insulating member (23), first arc extinguishing devices (27) are installed on the first input contact bases (26), first output contact bases (28) which are distributed corresponding to the first isolating knife assemblies (25) are fixed on the first lower insulating member (24), the second load switch (3) comprises two second support plates (31) which are distributed at intervals, second isolating members (35) which are distributed at intervals are installed on the second support plates (31), second isolating members (33) which are distributed at intervals are installed on the second support plates (35), second isolating members (33) which are distributed on the second isolating members (33) are fixed on the second isolating shaft (35), a second arc extinguishing device (37) is arranged on the second input contact seat (36), and second output contact seats (38) which are distributed corresponding to the second isolation knife assemblies (35) are fixed on the second lower insulating piece (34).
3. The compact high-voltage switch cabinet for the transformer substation according to claim 2, wherein three first outlet bushings (11), three second outlet bushings (12), three inlet bushings (13) and three fuses (4) are respectively arranged, the first outlet bushings (11) are connected with output ends of the fuses (4) in a one-to-one correspondence manner, input ends of the fuses (4) are connected with first output contact bases (28) in a one-to-one correspondence manner, the second outlet bushings (12) are connected with second output contact bases (38) in a one-to-one correspondence manner, and the inlet bushings (13) are connected with first input contact bases (26) in a one-to-one correspondence manner and are connected with second input contact bases (36) in a one-to-one correspondence manner.
4. The compact high-voltage switchgear for transformer substation according to claim 3, wherein the first isolating knife assembly (25) comprises a first crank arm (251), a first arc-shaped connecting piece (252), a first knife holder (253) and a first knife plate (254), the first crank arm (251) is fixed on the first isolating shaft (22), one end of the first arc-shaped connecting piece (252) is connected with the first crank arm (251) through a hinge, the other end of the first arc-shaped connecting piece (252) is connected with the first knife holder (253) through the hinge, a first through hole (255) is arranged in the middle of the first knife holder (253), the first knife plate (254) is fixed in the first through hole (255) of the first knife holder (253) through a first knife plate pin shaft (256), one end of the first knife plate (254) is pressed by a first disc spring assembly (257), the other end of the first knife plate (254) is hinged with the first input seat (26), the second isolating knife assembly (35) comprises a second crank arm (351), a second knife plate (351) and a second knife plate (354) are fixed on the second arc-shaped connecting piece (352) through the second arc-shaped connecting piece (351), the other end of second arc connecting piece (352) is connected with second blade holder (353) through the hinge, and the middle part of second blade holder (353) is equipped with second through-hole (355), second cutting board (354) are fixed in second through-hole (355) of second blade holder (353) through second cutting board round pin axle (356), and one end of second cutting board (354) compresses tightly through second disc spring subassembly (357), and the other end of second cutting board (354) is articulated with second input touch seat (36).
5. The compact high-voltage switchgear for transformer substation according to claim 4, wherein the first arc extinguishing device (27) comprises a first arc extinguishing grating mounting seat (271) and a plurality of first arc extinguishing grating pieces (272), one end of the first arc extinguishing grating mounting seat (271) is fixed on a first input contact seat (26), the other end of the first arc extinguishing grating mounting seat (271) extends leftwards to form a columnar first mounting part (273), a plurality of first mounting grooves (274) are formed at equal intervals from left to right on the lower side of the first mounting part (273), a plurality of first arc extinguishing grating pieces (272) are fixed in the first mounting grooves (274) in a one-to-one correspondence manner, a first groove (275) is formed in the middle of the lower side of the first arc extinguishing grating pieces (272), the second arc extinguishing device (37) comprises a second arc extinguishing grating mounting seat (371) and a plurality of second arc extinguishing grating pieces (372), one end of the second arc extinguishing grating mounting seat (371) is fixed on a second input contact seat (36), a plurality of first mounting grooves (274) are formed at equal intervals from left to right on the lower side of the second arc extinguishing grating mounting seat (371), a plurality of second arc extinguishing grating pieces (372) are formed at equal intervals on the left side of second arc extinguishing grating pieces (374) which extend leftwards on the second arc extinguishing grating pieces (372), and a second groove (375) is formed in the middle of the lower side of the second arc extinguishing grid plate (372).
6. The compact high-voltage switch cabinet for the transformer substation according to claim 5, wherein a first grounding contact seat (241) corresponding to the first isolation knife assembly (25) is installed on the first lower insulating piece (24), a second grounding contact seat (341) corresponding to the second isolation knife assembly (35) is installed on the second lower insulating piece (34), and a grounding copper bar (5) fixed on the cabinet body (1) is connected between the first grounding contact seat (241) and the second grounding contact seat (341).
7. The compact high-voltage switchgear for transformer substation according to claim 6, wherein the first and second isolating shafts (22, 32) are connected with a first and a second operating mechanism, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011422357.0A CN112490923B (en) | 2020-12-08 | 2020-12-08 | Compact high-voltage switch cabinet for transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011422357.0A CN112490923B (en) | 2020-12-08 | 2020-12-08 | Compact high-voltage switch cabinet for transformer substation |
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| Publication Number | Publication Date |
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| CN112490923A CN112490923A (en) | 2021-03-12 |
| CN112490923B true CN112490923B (en) | 2023-06-27 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101540480B (en) * | 2009-04-22 | 2011-05-04 | 宁波天安（集团）股份有限公司 | Vacuum-load isolating switch-fuse combined electrical apparatus |
| CN103474284B (en) * | 2013-09-24 | 2015-07-22 | 东盟电气集团浙江开关有限公司 | Three-work-station dual-ground-connection load switch |
| CN105071278A (en) * | 2015-07-31 | 2015-11-18 | 益和电气集团股份有限公司 | Two-in and one-out environment-friendly gas-insulated switchboard |
| CN205542437U (en) * | 2016-02-04 | 2016-08-31 | 北京科力恒久电力技术股份有限公司 | Circuit breaker and isolator's integral type structure |
| CN206148351U (en) * | 2016-11-16 | 2017-05-03 | 浙江鲁高电力科技有限公司 | High -voltage vacuum load switch |
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