CN112490923A - Compact high-voltage switch cabinet for transformer substation - Google Patents
Compact high-voltage switch cabinet for transformer substation Download PDFInfo
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- CN112490923A CN112490923A CN202011422357.0A CN202011422357A CN112490923A CN 112490923 A CN112490923 A CN 112490923A CN 202011422357 A CN202011422357 A CN 202011422357A CN 112490923 A CN112490923 A CN 112490923A
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- arc
- grounding
- knife
- load switch
- isolation
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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, and a first load switch, a second load switch and a fuse arranged in the cabinet body, wherein the cabinet body is filled with insulating gas, the cabinet body is provided with a first outgoing line sleeve, a second outgoing line sleeve and an incoming line sleeve, 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 a cabinet, the first load switch and the fuse are combined for use, and the second load switch is used for standby in an emergency, so that two common power supply loops and two standby power supply loops are formed, the requirements of sectional maintenance are met, meanwhile, uninterrupted continuous power supply is realized, the power supply stability is improved, and the emergency power supply system 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
With the continuous expansion of urban construction scale, the country deeply transforms urban and rural power grids, and high voltage is required to directly enter a load center to form a power supply pattern of high-voltage power receiving, transformer substation voltage reduction and low-voltage power distribution. The development of power supply and distribution is heading for compact products with small size and small floor space. In order to meet the demand of the development direction of power supply and distribution, the high-voltage side equipment of the box-type substation in the prior art usually adopts an HXGH-10 series air ring main unit or a ZN series column switch. However, the former uses a ring network for power supply, but has large volume and large occupied area, and is not beneficial to installation in limited space environments such as streets and the like; although the latter is small in size, the non-ring network power supply scheme has the defect that the sectional maintenance cannot be completed, and the requirements of the market on product miniaturization and sectional maintenance in case of high-voltage side failure cannot be met.
Disclosure of Invention
The invention aims to provide a compact high-voltage switch cabinet for a transformer substation, which meets the requirements of sectional maintenance, supplies power continuously, is stable, safe and reliable in power supply and small in size.
In order to solve the above problems in the prior art, the present invention provides a compact high voltage switch cabinet system for a transformer substation, which includes a cabinet, and a first load switch, a second load switch and a fuse arranged in the cabinet, wherein the cabinet is filled with insulating gas, the cabinet is provided with a first outgoing line bushing, a second outgoing line bushing and a line incoming bushing, the first outgoing line bushing is connected with an output end of the fuse, an input end of the fuse is connected with an output end of the first load switch, the second outgoing line bushing is connected with an output end of the second load switch, and the line incoming bushing is respectively connected with an input end of the first load switch and an input end of the second load switch.
Further, the compact high-voltage switch cabinet for the transformer substation of the invention is characterized in that the first load switch and the second load switch have the same structure, the first load switch comprises two first support plates distributed at intervals, a first isolation shaft, a first upper insulating member and a first lower insulating member are arranged between the two first support plates, three groups of first isolation knife assemblies distributed at intervals are arranged on the first isolation shaft, a first input end contact seat distributed corresponding to the first isolation knife assemblies is fixed on the first upper insulating member, a first arc extinguishing device is arranged on the first input end contact seat, a first output end contact seat distributed corresponding to the first isolation knife assemblies is fixed on the first lower insulating member, the second load switch comprises two second support plates distributed at intervals, a second isolation shaft, a second upper insulating member and a second lower insulating member are arranged between the two second support plates, the second isolating shaft is provided with three groups of second isolating cutter assemblies distributed at intervals, a second input end contact seat distributed corresponding to the second isolating cutter assemblies is fixed on the second upper insulating part, a second arc extinguishing device is installed on the second input end contact seat, and a second output end contact seat distributed corresponding to the second isolating cutter assemblies is fixed on the second lower insulating part.
Furthermore, the compact high-voltage switch cabinet for the transformer substation is provided with three first output sleeves, three second output sleeves, three wire inlet sleeves and three circuit breakers, wherein the first output sleeves are connected with the output ends of the fuses in a one-to-one corresponding mode, the input ends of the fuses are connected with the first output contact bases in a one-to-one corresponding mode, the second output sleeves are connected with the second output contact bases in a one-to-one corresponding mode, and the wire inlet sleeves are connected with the first input contact bases in a one-to-one corresponding mode and connected with the second input contact bases in a one-to-one corresponding mode.
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 a 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 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 the first input contact base, 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 a second isolation shaft, one end of the second arc-shaped connecting piece is connected with the second crank arm through a hinge, the other end of the second arc-shaped connecting piece is connected with the second tool apron through a hinge, a second through hole is formed in the middle of the second tool apron, the second cutting board is fixed in the second through hole of the second tool apron through a second pin shaft, one end of the second cutting board is pressed tightly through a second disc spring assembly, and the other end of the second cutting board is hinged to the second input contact base.
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 grid mounting seat and a plurality of first arc-extinguishing grid pieces, one end of the first arc-extinguishing grid mounting seat is fixed on a first input contact seat, the other end of the first arc-extinguishing grid mounting seat extends leftwards to form a columnar first mounting part, a plurality of first mounting grooves are formed in the lower side of the first mounting part at equal intervals from left to right, a plurality of first arc-extinguishing grid pieces are correspondingly fixed in the first mounting grooves one by one, a first groove is formed in the middle of the lower side of each first arc-extinguishing grid piece, a second arc-extinguishing device comprises a second arc-extinguishing grid mounting seat and a plurality of second arc-extinguishing grid pieces, one end of the second arc-extinguishing grid mounting seat is fixed on a second input contact seat, the other end of the second arc-extinguishing grid mounting seat extends leftwards to form a columnar second mounting part, a plurality of second mounting grooves are formed in the lower side of the second mounting, and a plurality of second arc-extinguishing grid pieces are fixed in the second mounting grooves in a one-to-one correspondence manner, and second grooves are formed in the middle of the lower sides of the second arc-extinguishing grid pieces.
Further, the compact high-voltage switch cabinet for the transformer substation is characterized in that the first lower insulating part is provided with a first grounding contact seat distributed corresponding to the first isolation knife assembly, the second lower insulating part is provided with a second grounding contact seat distributed corresponding to the second isolation knife assembly, and a grounding copper bar fixed on the cabinet body is connected between the first grounding contact seat and the second grounding contact seat.
Further, 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 a 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 compact high-voltage switch cabinet for the transformer substation comprises a grounding rack, a grounding isolation shaft and grounding knives, wherein the grounding rack is fixed on the inner side wall of the cabinet on the rear side of the fuse, the grounding isolation shaft is rotatably installed on the front side of the grounding rack, three groups of grounding knives distributed at intervals are installed on the grounding isolation shaft, the upper ends of the three grounding knives are respectively connected with the grounding rack through flexible connections, three third grounding contact seats corresponding to the grounding knives are arranged on the lateral rear side of the grounding isolation shaft, and the third grounding contact seats 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 interlocking arm, a second interlocking arm and a third interlocking arm, one end of the swing arm is fixed at the rear end of the first isolation 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 interlocking arm through a second pin shaft, the upper end of the first interlocking arm is connected with the lower end of the second interlocking arm through a third pin shaft, the upper end of the second interlocking arm is connected with the lower end of the third interlocking arm through a fourth pin shaft, the upper end of the third interlocking arm is fixed at the left side of the grounding isolation shaft, a first guide hole and a second guide hole which are arranged back and forth along the vertical direction are arranged on the left side wall of the grounding rack, the second guide hole is positioned at the front side of the first guide hole, the second pin shaft slides in the first guide hole, and the third pin shaft slides in the second guide hole.
Further, the compact high-voltage switch cabinet for the transformer substation is characterized in that the first isolation shaft and the second isolation 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 intelligent cabinet comprises a cabinet body, and a first load switch, a second load switch and a fuse arranged in the cabinet body, wherein the cabinet body is filled with insulating gas, a first outgoing line sleeve, a second outgoing line sleeve and a line incoming 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 line incoming sleeve is respectively connected with the input end of the first load switch and the input end of the second load switch. 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, power transmission and distribution are realized by the first load switch, and the fuse is used for rapidly cutting off short-circuit faults, so that further expansion of damage is avoided, and safe operation of a power supply line is guaranteed; when a transmission circuit controlled by the first load switch fails, the transmission circuit can be quickly switched to the second load switch, and the second load switch completes power transmission and distribution, so that the function of annular continuous power supply is realized. A one-inlet two-outlet power transmission scheme is formed, and segmented maintenance can be carried out when the high-voltage side of the transformer substation fails; the first load switch, the second load switch and the fuse are arranged in a cabinet, so that the overall structure volume is reduced, and the fuse is convenient to use in an environment with limited installation space; the safety protection device is arranged, so that the safety of the switch cabinet operation is ensured.
The following describes a compact high-voltage switch cabinet for a transformer substation in further detail with reference to the following specific embodiments shown in the accompanying 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 structural diagram of the compact high-voltage switch cabinet for a transformer substation with the front, upper and right side walls of the cabinet body hidden;
FIG. 4 is a front view of the compact high voltage switch cabinet for a transformer substation with the front, upper and right side walls of the cabinet body hidden;
FIG. 5 is a schematic structural diagram of a first isolating knife assembly in a compact high-voltage switch cabinet for a transformer 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 structural diagram of a safety protection device in a compact high-voltage switch cabinet for a transformer substation according to the present invention;
fig. 8 is a schematic side view of a safety protection device in a compact high-voltage switch cabinet for a transformer substation according to the present invention.
Detailed Description
First, it should be noted that, the directional terms such as up, down, front, rear, left, right, 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. The room in the present invention should be understood in a broad sense, and can be an independent space or several spaces which are communicated with each other.
As shown in fig. 1 and fig. 2 in combination with fig. 3, the embodiment of the compact high-voltage switch cabinet for a transformer substation of the present invention includes a cabinet 1, and a first load switch 2, a second load switch 3 and a fuse 4 which are disposed in the cabinet 1, wherein the cabinet 1 is filled with an insulating gas, the cabinet 1 is provided with a first outgoing line bushing 11, a second outgoing line bushing 12 and an incoming line bushing 13, the first outgoing line bushing 11 is connected to an output terminal of the fuse 4, an input terminal of the fuse 4 is connected to an output terminal of the first load switch 2, the second outgoing line bushing 12 is connected to an output terminal of the second load switch 3, and the incoming line bushing 13 is connected to an input terminal of the first load switch 1 and an input terminal of the second load switch 2, 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, power transmission and distribution are realized by the first load switch 2, and the fuse 4 is used for rapidly removing short-circuit faults, so that further expansion of damage is avoided, and safe operation of a power supply line is guaranteed; when the transmission circuit controlled by the first load switch 2 has a fault, the transmission circuit can be quickly switched to the second load switch 3, and the second load switch 3 completes transmission and distribution, so that the annular continuous power supply function is realized. A one-inlet two-outlet power transmission scheme is formed, and segmented maintenance can be carried out when the high-voltage side of the transformer substation fails; with first load switch 2, second load switch 3 and fuse 4 cabinet setting altogether, through reasonable configuration, with the compact installation of each electrical apparatus part, further reduced the volume of the cabinet body 1, be convenient for use in the limited environment of installation space.
As an optimized solution, as shown in fig. 3 and 4, the first load switch 2 and the second load switch 3 are configured in the same manner in the present embodiment. The first load switch 2 includes two first support plates 21 distributed at intervals, a first isolation shaft 22 is installed between the two first support plates 21, a first upper insulating member 23 and a first lower insulating member 24, three groups of first isolation knife assemblies 25 distributed at intervals are installed on the first isolation shaft 22, a first input end contact seat 26 distributed corresponding to the first isolation knife assembly 25 is fixed on the first upper insulating member 23, a first arc extinguishing device 27 is installed on the first input end contact seat 26, and a first output end contact seat 28 distributed corresponding to the first isolation knife assembly 25 is fixed on the first lower insulating member 24.
The second load switch 3 includes two second supporting plates 31 distributed at intervals, a second isolating shaft 32 is installed between the two second supporting plates 31, an insulating member 33 and a second lower insulating member 34 are installed on the second isolating shaft 33, three groups of second isolating knife assemblies 35 distributed at intervals are installed on the second isolating shaft 32, a second input end contact seat 36 distributed corresponding to the second isolating knife assemblies 35 is fixed on the second upper insulating member 33, a second arc extinguishing device 37 is installed on the second input end contact seat 36, and a second output end contact seat 38 distributed corresponding to the second isolating knife assemblies 35 is fixed on the second lower insulating member 34.
First and second operating mechanisms are coupled to the first and second spacer shafts 22, 32, respectively. The first lower insulator 24 is provided with a first grounding contact seat 241 which is distributed corresponding to the first isolation knife assembly 25, the second lower insulator 34 is provided with a second grounding contact seat 341 which is distributed corresponding to the second isolation 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 above structure is arranged reasonably and orderly, and the electric appliance is more compact in structure through the above reasonable arrangement while realizing the self function of the electric appliance, so that the size of the cabinet body is further reduced.
Through the design, the three-position operation of the standby first load switch 2 and the standby second load switch 3 can be realized. Taking the action of the first load switch 2 as an example, the specific three-position operation process is as follows: the first operating mechanism drives the first isolating shaft 22 to rotate so as to drive the first isolating knife assembly 25 to rotate, and when the first isolating knife assembly 25 rotates to the first grounding contact base 241, the first isolating knife assembly is in a grounding position; when the first isolation knife assembly 25 rotates to the first input terminal contact seat 26, it is at the switch-on position, and when the first isolation knife assembly 25 rotates to the position between the first grounding contact seat 241 and the first input terminal contact seat 26, it is at the isolation position; when the first isolation knife assembly 25 is rotated from the on position to the off position, the generated arc is cut off by the first arc extinguishing device 27, thereby realizing high-voltage switching-off. The three-position operation process of the second load switch 3 is the same as the three-position operation process of the first load switch 2, and is not described again.
As an optimized scheme, as shown in fig. 1, fig. 2, and fig. 3 in combination with fig. 4, in the present embodiment, three first output bushings 11, three second output bushings 12, three incoming bushings 13, and three circuit breakers 4 are respectively provided, the first output bushings 11 are connected to output ends of the fuses 4 in a one-to-one correspondence manner, input ends of the fuses 4 are connected to the first output contact bases 28 in a one-to-one correspondence manner, the second output bushings 12 are connected to the second output contact bases 38 in a one-to-one correspondence manner, and the incoming bushings 13 are connected to the first input contact bases 26 in a one-to-one correspondence manner and are connected to the second input contact bases 36 in a one. Through the reasonable orderly connection of above part of above design, make its structure compacter, be favorable to reducing the volume, realize the miniaturization and the sled dress of cubical switchboard and change.
As an optimized solution, as shown in fig. 3 and 4 in combination with fig. 5, the first isolation knife assembly 25 in this embodiment includes a first crank arm 251, a first arc-shaped connecting member 252, a first knife seat 253, and a first knife plate 254. The first crank arm 251 is fixed to the first spacer shaft 22, and one end of the first arc-shaped connection member 252 is connected to the first crank arm 251 by a hinge, and the other end of the first arc-shaped connection member 252 is connected to the first cutter holder 253 by 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 by a first pin 256, one end of the first knife board 254 is pressed by a first disc spring assembly 257, and the other end of the first knife board 254 is hinged to the first input contact holder 26.
The second isolation knife assembly 35 in this embodiment includes a second crank arm 351, a second arc-shaped connecting member 352, a second knife seat 353, and a second knife plate 354. The second crank arm 351 is fixed on the second isolation 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 353 is connected with the second cutter holder 353 through a hinge, a second through hole 355 is formed in the middle of the second cutter holder 353, the second cutter plate 254 is fixed in the second through hole 355 of the second cutter holder 353 through a second pin 356, one end of the second cutter plate 354 is pressed through a second disc spring component 357, and the other end of the second cutter plate 354 is hinged to the second input contact seat 36.
Through the design, the first knife board 254 in the first isolation knife assembly 25 and the second knife board 354 isolated to the assembly 35 are respectively and indirectly connected to the first isolation shaft 22 and the second isolation shaft 32, the rotation amplitude is smaller than that of the design that the knife boards are directly installed 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 optimized solution, as shown in fig. 3 and fig. 4 and in combination with fig. 6, the first arc-extinguishing device 27 in this embodiment includes a first arc-extinguishing grid mounting seat 271 and a plurality of first arc-extinguishing grid pieces 272, one end of the first arc-extinguishing grid mounting seat 271 is fixed on the first input contact seat 26, the other end of the first arc-extinguishing grid mounting seat 271 extends leftward to form a columnar first mounting portion 273, a plurality of first mounting grooves 274 are arranged at equal intervals from left to right on the lower side of the first mounting portion 273, the plurality of first arc-extinguishing grid pieces 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 grid pieces 272. The second arc extinguishing device 37 in this embodiment includes a second arc chute mounting seat 371 and a plurality of second arc chute pieces 372, one end of the second arc chute mounting seat 371 is fixed on the second input contact seat 36, the other end of the second arc chute mounting seat 371 extends leftwards to form a columnar second mounting part 373, a plurality of second mounting grooves 374 are equidistantly arranged from left to right on the lower side of the second mounting part 373, the plurality of second arc chute pieces 372 are fixed in the second mounting grooves 374 in a one-to-one correspondence manner, and a second groove 375 is arranged in the middle of the lower side of the second arc chute pieces 374. Therefore, the combined arc-extinguishing grid is formed, the generated electric arc is isolated in sections until the arc-extinguishing grid is extinguished, and the safety of power on and power off is guaranteed.
As an optimized scheme, as shown in fig. 7 and 8, the present embodiment further includes a safety protection device 6, the safety protection device 6 is connected to the first isolation 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.
Wherein, safety arrangement 6 includes ground frame 61, ground isolation axle 62 and earthing knife 63, ground frame 61 is fixed on the 1 inside wall of rack behind fuse 4, ground isolation axle 62 rotates the front side of installing at ground frame 61, ground isolation axle 62 is last to install three group interval distribution's earthing knife 63, the upper end of three earthing knife 63 is connected with ground frame 61 through flexible coupling 64 respectively, ground isolation axle 62's side rear is equipped with three third ground connection contact base 65 that corresponds with earthing knife 63, third ground connection contact base 65 is connected to fuse 4's output through the copper bar.
Wherein, the linkage assembly 7 comprises a swing arm 71, a push-pull rod 72, a first interlocking arm 73, a second interlocking arm 74 and a third interlocking arm 75, one end of the swing arm 71 is fixed at the rear end of the first isolating 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 76, the upper end of the push-pull rod 72 is connected with the lower end of the first interlocking arm 73 through a second pin 77, the upper end of the first interlocking arm 73 is connected with the lower end of the second interlocking arm 74 through a third pin 78, the upper end of the second interlocking arm 74 is connected with the lower end of the third interlocking arm 75 through a fourth pin 79, the upper end of the third interlocking arm 75 is fixed at the left side of the grounding isolating shaft 62, a first guide hole 611 and a second guide hole 612 which are arranged back and forth along the up-down direction are arranged on the left side wall of the grounding frame 61, the second guide hole 612 is positioned at the front side of the first guide hole 611, the second guide, the second pin 77 slides in the first guide hole 611, and the third pin 78 slides in the second guide hole 612. The specific action process is as follows: when the first load switch 2 is operated to ground, the first isolating shaft 22 in the first load switch 2 rotates counterclockwise, the swing arm 71 is driven to rotate upward, the push-pull rod 72 moves upward under the guiding action of the second pin 77 and the first guiding hole 611, the first interlocking arm 73 and the second interlocking arm 74 also move upward under the guiding action of the third pin 78 and the second guiding hole 612, at this time, the lower end of the third interlocking arm 75 moves upward, the grounding isolating shaft 62 is driven to rotate counterclockwise, and thus the lower end of the grounding knife 63 rotates backward 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 turned on, 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 device 6, when the first load switch 2 is operated to ground, the input of the fuse 4 is grounded, and the output of the fuse 4 is not reliably grounded. Through the use of the linkage component, the first load switch 2 drives the linkage component 7 to act when being grounded, so that the grounding knife 63 is grounded, the input end and the output end of the fuse 4 are grounded simultaneously, and the safety of the electric appliance structure is further guaranteed. Safety arrangement 6 occupies the spare position in the upper cabinet body 1 behind the fuse 4 broken off, need not expand the cabinet body 1, through linkage assembly 7's reasonable application, with fuse 4 ground connection operation restriction in grounding frame 61 space, makes its structure compacter, the installation space who saves, further has reduced the volume of the cabinet body.
The above embodiments are merely descriptions of the preferred embodiments of the present invention, and do not limit the scope of the invention claimed, and various modifications made by the 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.
Claims (10)
1. The utility model provides a compact high tension switchgear 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), be filled with insulating gas in the cabinet body (1), install first wire sleeve (11), second wire sleeve (12) and inlet wire sleeve (13) on the cabinet body (1), first wire sleeve (11) is connected with the output of fuse (4), and the input of fuse (4) is connected with the output of first load switch (2), second wire sleeve (12) is connected with the output of second load switch (3), inlet wire sleeve (13) are connected with the input of first load switch (1) and the input of second load switch (2) respectively.
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) distributed at intervals, a first isolation shaft (22), a first upper insulator (23) and a first lower insulator (24) are installed between the two first support plates (21), three groups of first isolation knife assemblies (25) distributed at intervals are installed on the first isolation shaft (22), a first input contact base (26) distributed corresponding to the first isolation knife assembly (25) is fixed on the first upper insulator (23), a first arc extinguishing device (27) is installed on the first input contact base (26), a first output contact base (28) distributed corresponding to the first isolation knife assembly (25) is fixed on the first lower insulator (24), second load switch (3) are including two interval distribution's second mounting panel (31), two install second between second mounting panel (31) and separate axle (32), insulator (33) and second lower insulating part (34) on the second, second separates and installs three group interval distribution's second isolation knife tackle spare (35) on axle (32), be fixed with on insulator (33) on the second and keep apart the second input that knife tackle spare (35) correspond the distribution and touch seat (36), second input touches and installs second arc extinguishing device (37) on seat (36), is fixed with on insulator (34) down on the second and keeps apart the second output that knife tackle spare (35) correspond the distribution and touches seat (38).
3. The compact high-voltage switch cabinet for the transformer substation of claim 2, wherein the number of the first output bushings (11), the number of the second output bushings (12), the number of the incoming bushings (13) and the number of the circuit breakers (4) are three, the first output bushings (11) are correspondingly connected with the output ends of the fuses (4), the input ends of the fuses (4) are correspondingly connected with the first output contact bases (28), the second output bushings (12) are correspondingly connected with the second output contact bases (38), and the incoming bushings (13) are correspondingly connected with the first input contact bases (26) and the second input contact bases (36).
4. The compact high-voltage switch cabinet for the transformer substation according to claim 3, wherein the first isolation knife assembly (25) comprises a first crank arm (251), a first arc-shaped connecting member (252), a first knife holder (253) and a first knife board (254), the first crank arm (251) is fixed on the first isolation shaft (22), one end of the first arc-shaped connecting member (252) is connected with the first crank arm (251) through a hinge, the other end of the first arc-shaped connecting member (252) is connected with the first knife holder (253) through a hinge, a first through hole (255) is formed in the middle of the first knife holder (253), the first knife board (254) is fixed in the first through hole (255) of the first knife holder (253) through a first pin shaft (256), one end of the first knife board (254) is pressed through a first disc spring assembly (257), and the other end of the first knife board (254) is hinged to the first input contact holder (26), the second isolation knife assembly (35) comprises a second crank arm (351), a second arc-shaped connecting piece (352), a second knife holder (353) and a second knife board (354), the second crank arm (351) is fixed on a second isolation 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 (353) is connected with the second knife holder (353) through a hinge, a second through hole (355) is formed in the middle of the second knife holder (353), the second knife board (254) is fixed in the second through hole (355) of the second knife holder (353) through a second pin shaft (356), one end of the second knife board (354) is pressed through a second disc spring assembly (357), and the other end of the second knife board (354) is hinged to a second input contact holder (36).
5. The compact high-voltage switch cabinet for the transformer substation according to claim 4, wherein the first arc-extinguishing device (27) comprises a first arc-extinguishing grid mounting seat (271) and a plurality of first arc-extinguishing grid pieces (272), one end of the first arc-extinguishing grid mounting seat (271) is fixed on the first input contact base (26), the other end of the first arc-extinguishing grid mounting seat (271) extends leftwards to form a columnar first mounting part (273), a plurality of first mounting grooves (274) are arranged on the lower side of the first mounting part (273) at equal intervals from left to right, the plurality of first arc-extinguishing grid pieces (272) are fixed in the first mounting grooves (274) in a one-to-one correspondence manner, a first groove (275) is arranged in the middle of the lower side of the first arc-extinguishing grid piece (272), and the second arc-extinguishing device (37) comprises a second arc-extinguishing grid mounting seat (371) and a plurality of second arc-extinguishing grid pieces (372), one end of second arc extinguishing bars mount pad (371) is fixed on second input touches seat (36), and the other end of second arc extinguishing bars mount pad (371) extends left and forms cylindrical second installation department (373), second installation department (373) downside is equipped with a plurality of second mounting grooves (374) from a left side to the right equidistant second installation groove (374), and is a plurality of second arc extinguishing bars piece (372) one-to-one fixes in second mounting groove (374), the downside middle part of second arc extinguishing bars piece (374) is equipped with second recess (375).
6. The compact high-voltage switch cabinet for the transformer substation of claim 5, wherein a first grounding contact seat (241) distributed corresponding to the first isolation knife assembly (25) is installed on the first lower insulator (24), a second grounding contact seat (341) distributed corresponding to the second isolation knife assembly (35) is installed on the second lower insulator (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. A compact high-voltage switch cabinet for substations according to one of claims 1 to 6, characterized by further comprising a safety protection device (6), the safety protection device (6) being connected to the first isolation shaft (22) through a linkage assembly (7), the safety protection device (6) being driven to ground the output of the fuse (4) when the first load switch (2) is grounded.
8. A compact high voltage switchgear for substations according to claim 7, the safety protection device (6) comprises a grounding frame (61), a grounding isolation shaft (62) and a grounding knife (63), the grounding frame (61) is fixed on the inner side wall of the cabinet (1) at the rear side of the fuse (4), the grounding isolation shaft (62) is rotatably arranged at the front side of the grounding rack (61), three groups of grounding knives (63) distributed at intervals are arranged on the grounding isolation shaft (62), the upper ends of the three grounding knives (63) are respectively connected with the grounding rack (61) through flexible connections (64), three third grounding contact seats (65) corresponding to the grounding knife (63) are arranged at the lateral rear part of the grounding isolation shaft (62), and the third grounding contact seat (65) is connected to the output end of the fuse (4) through a copper bar.
9. The compact high-voltage switch cabinet for substations according to claim 8, wherein the linkage assembly (7) includes a swing arm (71), a push-pull rod (72), a first interlocking arm (73), a second interlocking arm (74), and a third interlocking arm (75), one end of the swing arm (71) is fixed to the rear end of the first isolation shaft (22), the other end of the swing arm (71) is connected to the lower end of the push-pull rod (72) through a first pin (76), the upper end of the push-pull rod (72) is connected to the lower end of the first interlocking arm (73) through a second pin (77), the upper end of the first interlocking arm (73) is connected to the lower end of the second interlocking arm (74) through a third pin (78), the upper end of the second interlocking arm (74) is connected to the lower end of the third interlocking arm (75) through a fourth pin (79), and the upper end of the third interlocking arm (75) is fixed to the left side of the grounding isolation shaft (62), 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 located on the front side of the first guide hole (611), the second guide hole (612) is inclined towards the extending direction of the first guide hole (611) gradually 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).
10. A compact high-voltage switchgear for substations according to claim 9, characterized in that the first and second isolating shafts (22, 32) are connected with a first and second operating mechanism, respectively.
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| 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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| 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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| CN112490923A true CN112490923A (en) | 2021-03-12 |
| CN112490923B CN112490923B (en) | 2023-06-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101540480A (en) * | 2009-04-22 | 2009-09-23 | 宁波天安（集团）股份有限公司 | Vacuum-load isolating switch-fuse combined electrical apparatus |
| CN103474284A (en) * | 2013-09-24 | 2013-12-25 | 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 |
-
2020
- 2020-12-08 CN CN202011422357.0A patent/CN112490923B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101540480A (en) * | 2009-04-22 | 2009-09-23 | 宁波天安（集团）股份有限公司 | Vacuum-load isolating switch-fuse combined electrical apparatus |
| CN103474284A (en) * | 2013-09-24 | 2013-12-25 | 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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| Publication number | Publication date |
|---|---|
| CN112490923B (en) | 2023-06-27 |
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