CN119171319B - 24KV switch cabinet - Google Patents
24KV switch cabinet Download PDFInfo
- Publication number
- CN119171319B CN119171319B CN202411667556.6A CN202411667556A CN119171319B CN 119171319 B CN119171319 B CN 119171319B CN 202411667556 A CN202411667556 A CN 202411667556A CN 119171319 B CN119171319 B CN 119171319B
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- component
- insulating
- moving contact
- contact component
- switch
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- 230000005540 biological transmission Effects 0.000 claims abstract description 40
- 238000002955 isolation Methods 0.000 claims abstract description 29
- 230000000670 limiting effect Effects 0.000 claims description 51
- 239000000872 buffer Substances 0.000 claims description 44
- 230000003068 static effect Effects 0.000 claims description 42
- 230000007246 mechanism Effects 0.000 claims description 21
- 238000009413 insulation Methods 0.000 claims description 20
- 230000000712 assembly Effects 0.000 claims description 13
- 238000000429 assembly Methods 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 6
- 230000005684 electric field Effects 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000006173 Good's buffer Substances 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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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
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/02—Details
- H02B11/04—Isolating-contacts, e.g. mountings or shieldings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/64—Protective enclosures, baffle plates, or screens for contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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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
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/202—Cable lay-outs
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/02—Details
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
本发明属于开关柜技术领域，具体涉及一种24KV开关柜。本发明的24kV开关柜，通过在动触头构件外侧包覆第一绝缘套，并且第一绝缘套下端位于转轴沿长度方向的两侧分别向下延伸有绝缘挡沿，使得动触头构件在隔离位置或合闸位置时，避免动触头构件与柜壳之间产生电弧放电的现象，提高24KV开关柜使用可靠性的同时可以降低柜壳的生产尺寸，方便产品运输、安装和维护。另外，动触头构件两侧分别通过绝缘连杆组件和操动轴传动连接，动触头构件与操动轴之间也设置有绝缘挡板，使得动触头构件两侧受力平稳，具有传动稳定性好以及动触头构件分合闸动作时摆动更精确的优点，同时，避免动触头构件与操动轴之间产生电弧放电的风险，开关柜使用可靠性好。
The present invention belongs to the technical field of switch cabinets, and specifically relates to a 24KV switch cabinet. The 24kV switch cabinet of the present invention, by covering the outer side of the moving contact member with a first insulating sleeve, and the lower end of the first insulating sleeve is located at both sides of the rotating shaft along the length direction and has insulating baffles extending downward respectively, so that when the moving contact member is in the isolation position or the closing position, arc discharge between the moving contact member and the cabinet shell is avoided, and the reliability of the use of the 24KV switch cabinet can be improved while reducing the production size of the cabinet shell, which is convenient for product transportation, installation and maintenance. In addition, the two sides of the moving contact member are respectively connected by an insulating connecting rod assembly and an operating shaft, and an insulating baffle is also provided between the moving contact member and the operating shaft, so that the two sides of the moving contact member are stably stressed, and have the advantages of good transmission stability and more precise swinging of the moving contact member during the opening and closing actions. At the same time, the risk of arc discharge between the moving contact member and the operating shaft is avoided, and the switch cabinet has good reliability in use.
Description
Technical Field
The invention belongs to the technical field of switch cabinets, and particularly relates to a 24KV switch cabinet.
Background
In an electric power system, high-voltage switch equipment such as a 24KV switch cabinet plays a crucial role, and is responsible for distributing, controlling and protecting electric energy, so that safe and stable operation of a power grid is ensured. However, with the increasing demand for electricity and the increasing complexity of the power grid, higher demands are placed on the safety and reliability of high voltage switchgear.
In existing 24KV switchgear designs, a significant technical challenge is the potential arcing problem between the moving contact member (or blade) and the metal cabinet housing during operation. Because the knife needs to swing greatly in the cabinet when the circuit is closed or opened, if the insulation distance between the knife and the cabinet or other metal parts is insufficient in the process, electric arcs are easy to generate under the action of a high-voltage electric field. The high temperature and high energy of the electric arc not only can cause serious ablation and damage to equipment, but also can cause explosion accidents more likely, and seriously threatens the safety of operators and the stable operation of a power system.
To address this technical problem, it has been conventional practice to increase the safety distance between the blade and the cabinet housing by increasing the overall size of the switchgear, thereby reducing the risk of arcing. However, this approach not only increases material and manufacturing costs, but also occupies more space resources, which is detrimental to compact layout and efficient utilization of the electrical facilities. In addition, excessive size may also cause inconvenience in transportation, installation, and maintenance.
Disclosure of Invention
The invention aims to solve the problem that the prior 24KV switch cabinet has an overall size due to the fact that the safety distance between a movable contact component and a cabinet shell is increased to reduce the risk of arc discharge, and provides a switch cabinet which has the overall size reduced by adopting an insulation protection mode for the movable contact component to avoid the problem of arc discharge.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A24 KV switch cabinet comprises a cabinet shell and a conductive component, wherein the cabinet shell is provided with a switch chamber and a cable chamber which are arranged from top to bottom, a cable sleeve is arranged in the cable chamber, the conductive component is arranged in the switch chamber and comprises a support, an insulating pull rod, a main bus component, a vacuum arc-extinguishing chamber component, an isolation static contact component and a three-station switch which are sequentially arranged on the support, the cable sleeve is connected with the three-station switch through a cable bus, the main bus component is connected with a movable contact part at the upper end of the vacuum arc-extinguishing chamber component through a flexible connecting piece, a fixed contact part at the lower end of the vacuum arc-extinguishing chamber component is connected with the isolation static contact component, the movable contact part at the upper end of the vacuum arc-extinguishing chamber component is driven to be electrically connected with the fixed contact part, so that the main bus component is electrically connected with the cable sleeve through the vacuum arc-extinguishing chamber component and the three-station switch, the three-station switch comprises a movable contact component with one end of which is rotationally connected with the cable bus, a first insulating sleeve which is coated on the outer side of the whole movable contact component, and a three-station movable contact mechanism which is in transmission connection with the movable contact component, the other end of the movable contact component is a movable contact of the first insulating sleeve, and the three-station switch mechanism is used for driving the movable contact component to swing the movable contact component relative to drive the movable contact component to be connected with the movable contact component, or the movable contact component to be disconnected with the vacuum arc-insulating sleeve through the vacuum arc-insulating sleeve, or the vacuum switch is connected with or the vacuum switch.
Compared with the prior art, the 24KV switch cabinet has the advantages that the first insulating sleeve is coated on the outer side of the movable contact component, so that the phenomenon of arc discharge between the movable contact component and the cabinet shell is avoided when the movable contact component is in the isolation position or the closing position, the use reliability of the 24KV switch cabinet is improved, the production size of the cabinet shell can be reduced, and the product transportation, the installation and the maintenance are convenient.
Furthermore, the lower end of the movable contact component is rotationally connected with the upper end of the cable bus through the rotating shaft, the lower end of the first insulating sleeve is positioned at two sides of the rotating shaft along the length direction and is respectively provided with an insulating blocking edge in a downward extending mode, and through the arrangement, the risk of arc discharge between the movable contact component and the cabinet shell is further reduced through the arrangement that the insulating blocking edge is arranged at the root position of the lower end of the movable contact component.
The three-station operating mechanism comprises a driving device, an operating shaft and two groups of insulating connecting rod assemblies which are respectively positioned at two sides of a moving contact component, wherein the operating shaft is positioned at one side of the bracket, the operating shaft is in transmission connection with the moving contact component through the two groups of insulating connecting rod assemblies, the insulating connecting rod assemblies comprise a first insulating connecting rod connected with the operating shaft, a second insulating connecting rod connected with the side part of the moving contact component and a third insulating connecting rod arranged between the first insulating connecting rod and the second insulating connecting rod, two ends of the third insulating connecting rod are respectively in rotary connection with adjacent ends of the first edge connecting rod and the second edge connecting rod, through the arrangement, two sides of the moving contact component are respectively in transmission connection through the insulating connecting rod assemblies, the two sides of the moving contact component are stable in stress, the transmission stability is good, and swinging of the moving contact component is more accurate during switching-on and switching-off actions, and the driving device can adopt the existing mechanical device for driving the operating shaft to rotate relatively.
The switch chamber side wall plate is further provided with a grounding circuit component connected with a grounding circuit, the isolation static contact component is provided with an isolation static contact, the grounding circuit component is provided with three-phase grounding static contacts, three stations of the three-station switch are respectively corresponding to a closing station where a moving contact is contacted with the isolation static contact, a floating isolation station where the moving contact is positioned between the three-phase grounding static contact and the isolation static contact and a grounding station where the moving contact is contacted with the three-phase grounding static contact, the support is positioned at one side close to the grounding circuit component and is provided with a movable avoidance opening, two sides close to an insulating connecting rod component are respectively provided with a transmission avoidance opening, when the moving contact component swings relatively, the movable avoidance opening stretches out to be in contact fit with the grounding circuit component, the insulating connecting rod component is in transmission connection with the moving contact component through the transmission avoidance opening, one side close to an operating shaft is provided with an insulating baffle, the moving contact component and the operating shaft are respectively positioned at two sides of the insulating baffle, an insulating partition is arranged between the movable avoidance opening and the side wall plate of the switch chamber, and the risk of arc discharge between the moving contact and the side wall plate is avoided by arranging the support and the insulating partition plate respectively.
Further, the three-station operating mechanism further comprises a rotation limiting part arranged on the operating shaft, a limiting buffer structure is correspondingly arranged on a side wall plate, close to one side of the operating shaft, of the switch chamber, a first limiting ejector rod and a second limiting ejector rod are respectively arranged on two sides of the rotation limiting part, a first limiting surface is arranged at the end part of the first limiting ejector rod, a second limiting surface is arranged at the end part of the second limiting ejector rod, an included angle between the two limiting ejector rods corresponds to the swing in place of the movable contact component between the isolation fixed contact component and the grounding loop component, when the movable contact component swings in place relatively to the isolation fixed contact component, the first limiting ejector rod rotates to the first limiting surface to be abutted on the limiting buffer structure along with the operating shaft, and when the movable contact component swings in place relatively to the grounding loop component along with the operating shaft, the second limiting ejector rod rotates to the second limiting surface to be abutted on the limiting buffer structure, and through the arrangement, the rotation limiting part is used for limiting when the movable contact component moves in place relatively to the isolation fixed contact component or the three-phase grounding fixed contact, so that collision loss caused by excessive movement of the movable contact component is avoided.
Furthermore, the limiting buffer structure comprises a buffer baffle plate and a buffer pad, wherein the buffer baffle plate is arranged on the side wall plate of the switch chamber through the buffer pad, and the limiting buffer structure is simple in arrangement mode and good in buffer effect.
Further, the main bus assembly comprises side expansion sleeves connected to two sides of the flexible connecting piece, the vacuum arc-extinguishing chamber component is connected to the flexible connecting piece, the vacuum arc-extinguishing chamber assembly further comprises a breaker operating mechanism, the breaker operating mechanism is used for driving the insulating pull rod to move up and down relatively through a transmission structure, so that a movable contact part of the vacuum arc-extinguishing chamber component is pushed to conduct switching on or off through a conducting rod and a fixed contact part, circuit switching on or off between the vacuum arc-extinguishing chamber component and the cable bus is achieved, the transmission structure comprises a main shaft and a transmission connecting rod connected to the main shaft, the outer end of the transmission connecting rod is in rotary connection with the upper end of the insulating pull rod, the breaker operating mechanism is used for driving the main shaft to rotate relatively through forward and reverse directions, the insulating pull rod is driven to move up and down through the transmission connecting rod, and through the arrangement, the transmission structure is simple in setting mode and convenient to manufacture. The breaker operating mechanism may employ existing mechanical means for driving the relative rotation of the main shaft.
Further, the left wall plate and the right wall plate of the switch chamber are respectively provided with a supporting beam at the upper side and the lower side of the side expansion sleeve, so that the side expansion sleeve has better supporting force when being connected with an external cable.
The switch cabinet is characterized by further comprising a top mounting beam and a bottom mounting beam, wherein the top of the bracket is connected to the top of the switch cabinet through the top mounting beam, and the bottom of the bracket is mounted at the bottom of the switch cabinet through the bottom mounting beam; the support comprises two insulating isolation frames which are oppositely arranged, an upper positioning plate, a middle positioning plate and a bottom insulating positioning plate which are arranged between the insulating isolation frames at two sides from top to bottom, wherein the upper end of a vacuum arc-extinguishing chamber component is connected with the upper positioning plate, the lower end of the vacuum arc-extinguishing chamber component is connected with the middle positioning plate, an insulating static contact component is connected with the bottom of the middle positioning plate, a three-station switch is arranged between the middle positioning plate and the bottom insulating positioning plate, a corrugated sleeve is vertically arranged on the bottom insulating positioning plate, a cable bus is arranged in the corrugated sleeve and extends out of the upper end of the corrugated sleeve to be rotationally connected with the lower end of a driven contact component, and by the arrangement, the conductive component is simple in structure and convenient for an insulating pull rod, a main bus component, the vacuum arc-extinguishing chamber component, the insulating static contact component and the three-station switch to be installed on the support and then installed in a cabinet shell together with the support, so that the assembly and the manufacture of products are facilitated.
Further, the cable bushing is arranged at the outer end of the cable bushing, the lower end of the cable bus is sleeved with an insulating cap, a first connecting skirt edge and a second connecting skirt edge are outwards extended from the side part of the insulating cap, the second connecting skirt edge is arranged on the outer periphery of the first connecting skirt edge, two groups of clamping protrusions are arranged on the inner periphery of the first connecting skirt edge along the axial direction, a splicing cavity matched with the shapes of the first connecting skirt edge and the second connecting skirt edge is arranged on the outer side of the cable bushing, clamping grooves matched with the two groups of clamping protrusions are formed in the inner periphery of the splicing cavity, and through the arrangement, the cable bushing and the cable bus are firmly assembled and connected, and the insulating effect is good.
Further, a moving knife buffer piece is arranged on one side, far away from the moving contact, of the isolating static contact component, when the moving contact follow-up contact component is switched on in place relative to the isolating static contact component, the moving contact is buffered and stopped on the moving knife buffer piece, an electric field control piece is arranged at the lower end of the isolating static contact component, a grounding buffer piece is arranged on one side, far away from the moving contact component, of the grounding loop component, when the moving contact follow-up contact component is switched on in place relative to the grounding loop component, the moving contact is buffered and stopped on the grounding buffer piece, and through the arrangement, the moving contact component is effectively limited to move excessively relative to each other, and the limiting and buffering effects of the moving contact component are good.
Drawings
Fig. 1 is a schematic diagram of the internal structure of a 24KV switchgear.
Fig. 2 is a schematic diagram of a three-position switch and a bracket.
Fig. 3 is a schematic view 1 of a conductive assembly.
Fig. 4 is a schematic view of a conductive assembly 2.
Fig. 5 is a schematic view of the conductive assembly of fig. 3.
Fig. 6 is a schematic view of a conductive assembly, fig. 4.
Fig. 7 is a schematic view of the assembly of the cable bushing with the insulating cap.
Fig. 8 is an exploded cross-sectional view of the cable bushing and the insulating cap.
Fig. 9 is a cross-sectional view of B-B of fig. 8.
Fig. 10 is an isometric view of three sets of conductive elements.
The reference numerals of the cabinet housing 1, the conductive assembly 2, the switch chamber 11, the cable chamber 12, the cable jacket 13, the bracket 20, the insulation pull rod 21, the main bus assembly 22, the vacuum interrupter member 23, the isolation static contact member 24, the three-position switch 3, the cable bus 14, the movable contact member 31, the first insulation sleeve 32, the operation shaft 33, the insulation blocking edge 321, the first insulation connecting rod 34, the second insulation connecting rod 35, the third insulation connecting rod 36, the ground circuit member 15, the movable avoidance opening 201, the transmission avoidance opening 202, the insulation blocking plate 203, the rotation limiting piece 37, the first limiting push rod 371, the second limiting push rod 372, the first limiting surface 373, the second limiting surface 374, the buffer blocking plate 381, the buffer pad 382, the side expansion sleeve 221, the top mounting beam 16, the insulation isolation frame 203, the upper positioning plate 204, the middle positioning plate 205, the bottom insulation positioning plate 206, the bellows 207, the cable bushing 131, the insulation cap 141, the first connection skirt 142, the second connection skirt 143, the clamping protrusion 144, the plug cavity 132, the clamping groove 133, the insulation partition plate 208, the first lateral connection frame 111, the second lateral connection frame 155, the movable contact support beam 29, the movable contact support beam 245, the transmission limiting support beam 219, the transmission limiting support beam 52, the transmission limiting piece 219, the transmission limiting support beam 52, the transmission limiting support frame 219, the transmission limiting support shafts 52, the transmission limiting support shafts 219.
Detailed Description
The following describes specific embodiments of the present invention with reference to the drawings. In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
Referring to fig. 1 to 10, the 24kV switch cabinet comprises a cabinet shell 1 and a conductive component 2, wherein the cabinet shell 1 is provided with a switch chamber 11 and a cable chamber 12 which are arranged from top to bottom, a cable sleeve 13 is arranged in the cable chamber 12, the conductive component 2 is arranged in the switch chamber 11 and comprises a support 20, an insulating pull rod 21, a main bus component 22, a vacuum arc-extinguishing chamber component 23, an isolated static contact component 24 and a three-position switch 3 which are sequentially arranged on the support 20, the cable sleeve 13 is connected with the three-position switch 3 through a cable bus 14, the main bus component 22 is connected with the upper end moving contact part 231 of the vacuum arc-extinguishing chamber component 23 through a flexible connecting piece 29, a fixed contact part 232 at the lower end of the vacuum arc-extinguishing chamber component 23 is connected with the isolated static contact component 24, the moving contact part 231 at the upper end of the vacuum arc-extinguishing chamber component 23 is pushed to be electrically connected with the fixed contact part 232 when the insulating pull rod 21 is driven, so that the main bus component 22 is electrically connected with the cable sleeve 13 through the vacuum chamber component 23 and the three-position switch 3, the three-position switch 3 comprises a moving contact component 31 with one end of which is rotatably connected with the cable bus 14, a moving contact component 31 which is covered on the outer side of the cable component or the three-position switch component 31 is electrically connected with the moving contact component 31 or the three-position component 31 which is electrically connected with the whole moving contact component 31 through the three-position control component or the three-position control component 31, and the vacuum arc-insulating component is electrically connected with the moving contact component is electrically, or the whole control component is electrically-connected with the moving contact component is electrically, or the moving contact component is electrically-connected with the moving contact component 31 through the moving contact component.
Compared with the prior art, the 24KV switch cabinet has the advantages that the first insulating sleeve 32 is coated on the outer side of the movable contact component 31, so that the phenomenon of arc discharge between the movable contact component 31 and the cabinet shell 1 is avoided when the movable contact component 31 is in the isolation position or the closing position, the use reliability of the 24KV switch cabinet is improved, the production size of the cabinet shell 1 can be reduced, and the product transportation, the installation and the maintenance are convenient.
Referring to fig. 1 to 6, in one embodiment, the lower end of the moving contact member 31 is rotatably connected to the upper end of the cable bus 14 through a rotating shaft 311, and the lower end of the first insulating sleeve 32 is located at two sides of the rotating shaft 311 along the length direction and extends downwards to form insulating blocking edges 321, so that the risk of arc discharge between the moving contact member 31 and the cabinet shell 1 is further reduced by arranging the insulating blocking edges 321 at the root position of the lower end of the moving contact member 31.
Referring to fig. 1 to 6, in one embodiment, the three-position operating mechanism comprises a driving device (not shown), an operating shaft 33 and two groups of insulating connecting rod assemblies respectively positioned at two sides of the moving contact member 31, wherein the operating shaft 33 is positioned at one side of the bracket 20, the operating shaft 33 is in transmission connection with the moving contact member 31 through the two groups of insulating connecting rod assemblies, the insulating connecting rod assemblies comprise a first insulating connecting rod 34 connected with the operating shaft 33, a second insulating connecting rod 35 connected with the side part of the moving contact member 31 and a third insulating connecting rod 36 arranged between the first insulating connecting rod 34 and the second insulating connecting rod 35, two ends of the third insulating connecting rod 36 are respectively in transmission connection with adjacent ends of the first edge connecting rod and the second edge connecting rod, by the arrangement, two sides of the moving contact member 31 are respectively in transmission connection through the insulating connecting rod assemblies, the two sides of the moving contact member 31 are stressed stably, the transmission stability is good, and the swinging of the moving contact member 31 during opening and closing actions is more accurate, and the driving device can adopt the existing mechanical device for driving the relative rotation of the operating shaft 33.
Referring to fig. 1,3 and 6, in one embodiment, a side wall plate of the switch chamber 11 is provided with a ground circuit member 15 connected with a ground circuit, the isolating static contact member 24 is provided with an isolating static contact, the ground circuit member 15 is provided with three-phase ground static contacts, three stations of the three-station switch 3 respectively correspond to a closing station where a moving contact contacts the isolating static contact, a moving contact is positioned at a floating isolating station between the three-phase ground static contact and the isolating static contact, and a grounding station where the moving contact contacts the three-phase ground static contact, the support 20 is positioned at one side close to the ground circuit member 15 and is provided with a movable avoidance port 201, the support 20 is positioned at two sides close to an insulating connecting rod assembly, respectively, transmission avoidance ports 202 are respectively arranged at two sides close to the insulating connecting rod assembly, the moving contact member 31 is in a transmission connection with the ground circuit member 15 through the movable avoidance port 201, the insulating connecting rod assembly is in transmission connection with the moving contact member 31, the support 20 is positioned at one side close to an operating shaft 33, the moving contact member 31 and the operating shaft 33 is respectively provided with an insulating baffle 203, the moving contact 33 is positioned at two sides close to the operating shaft 33, the moving contact 33 is respectively, and the support 20 is also provided with an insulating baffle 33, the insulating baffle 33 is respectively, and the risk of generating between the moving contact and the moving contact 33 and the insulating baffle 20 is avoided from being positioned at two sides of the moving shaft 33, the side wall plate and the side wall plate 11 is provided with the insulating barrier member 33, the insulating barrier 11.
Referring to fig. 1, 3 and 6, in an embodiment, the three-position operating mechanism further includes a rotation limiter 37 disposed on the operating shaft 33, a side wall plate on one side of the switch chamber 11 near the operating shaft 33 is correspondingly provided with a limit buffer structure, two sides of the rotation limiter 37 are respectively provided with a first limit push rod 371 and a second limit push rod 372, the end of the first limit push rod 371 is provided with a first limit surface 373, the end of the second limit push rod 372 is provided with a second limit surface 374, an included angle between the two limit push rods corresponds to a phase of swinging of the moving contact member 31 between the isolating fixed contact member 24 and the ground circuit member 15, when the moving contact member 31 swings to the position relative to the isolating fixed contact member 24, the first limit push rod 371 rotates to the first limit surface 373 to abut against the limit buffer structure, and when the ground circuit member 15 swings to the position relative to the operating shaft 33, the second limit push rod 372 rotates to the second limit surface 374 abuts against the limit buffer structure, so that excessive movement of the moving contact member 31 relative to the isolating fixed contact member 24 or the moving contact member 31 is prevented from moving to the three-phase ground through the limit buffer structure.
Referring to fig. 1, 3 and 6, in one embodiment, the limit buffer structure includes a buffer baffle 381 and a buffer pad 382, the buffer baffle 381 is disposed on a side wall plate of the switch chamber 11 through the buffer pad 382, and by this arrangement, the limit buffer structure is simply disposed and has a good buffer effect.
Referring to fig. 1, 3 and 6, in one embodiment, the main bus assembly 22 includes side expansion sleeves 221 connected to two sides of the flexible connection member 29, the vacuum interrupter member 23 is connected to the flexible connection member 29, and further includes a circuit breaker operating mechanism, the circuit breaker operating mechanism is used for driving the insulating pull rod 21 to move up and down relatively through a transmission structure, so as to push the movable contact 231 of the vacuum interrupter member 23 to close or open the switch with the fixed contact 232 through a conductive rod, and the circuit between the vacuum interrupter member 23 and the cable bus 14 is switched on or off, the transmission structure includes a main shaft 51 arranged on the top mounting beam 16 and a transmission link 52 connected to the main shaft 51, the outer end of the transmission link 52 is rotationally connected to the upper end of the insulating pull rod 21, and the circuit breaker operating mechanism is used for driving the insulating pull rod 21 to move up and down relatively through the transmission link 52. The breaker operating mechanism may employ a conventional mechanical device for driving the spindle 51 to rotate relatively.
In one embodiment, the left wall plate and the right wall plate of the switch chamber 11 are respectively provided with supporting beams 219 at the upper side and the lower side of the side extension pipe 221, so that the side extension pipe 221 has a good supporting force when connecting an external cable.
Referring to fig. 1, in one embodiment, the vacuum interrupter comprises a top mounting beam 16, wherein the top of the bracket 20 is connected to the top of the switch chamber 11 through the top mounting beam 16, the bracket 20 comprises two opposite insulating isolation frames 203, an upper positioning plate 204, a middle positioning plate 205 and a bottom insulating positioning plate 206 which are arranged between the insulating isolation frames 203 from top to bottom, the two insulating isolation frames 203 are respectively connected to two sides of the upper positioning plate 204 and the bottom insulating positioning plate 206, the bracket 20 forms a frame structure, the upper end of the vacuum interrupter member 23 is connected to the upper positioning plate 204, the lower end of the vacuum interrupter member is connected to the middle positioning plate 205, the isolating static contact member 24 is connected to the bottom of the middle positioning plate 205, the three-position switch 3 is arranged between the middle positioning plate 205 and the bottom insulating positioning plate 206, the bottom insulating positioning plate 206 is vertically provided with a corrugated sleeve 207, the cable bus 14 is arranged in the corrugated sleeve 207 and extends out from the upper end of the corrugated sleeve 207 to be rotationally connected with the lower end of the driven contact member 31, and by the arrangement, the conductive assembly 2 has a simple structure, the insulating 21, the main assembly 22, the isolating contact member 23, the static contact member 24 and the three-position switch member 24 are conveniently assembled in the product housing 20 and the product housing 1 are manufactured together after the three-position switch member 20 is mounted in the bracket 20.
Referring to fig. 1 to 10, in an embodiment, the outer end of the cable bushing 13 is provided with a cable bushing 131, the lower end of the cable bus 14 is sleeved with an insulating cap 141, a first connecting skirt 142 and a second connecting skirt 143 located at the outer periphery of the first connecting skirt 142 extend outwards from the side of the insulating cap 141, two groups of clamping protrusions 144 are provided at the inner periphery of the first connecting skirt 142 along the axial direction, an inserting cavity 132 matched with the shapes of the first connecting skirt 142 and the second connecting skirt 143 is provided at the outer side of the cable bushing 131, and a clamping groove 133 matched with the two groups of clamping protrusions 144 is provided at the inner periphery of the inserting cavity 132.
Referring to fig. 1, 3 and 6, in one embodiment, a moving knife buffer 245 is disposed on a side of the isolating static contact member 24 away from the moving contact, the moving contact is buffered and stopped on the moving knife buffer 245 when the moving contact following contact member 31 is switched on in place relative to the isolating static contact member 24, an electric field control member is disposed at the lower end of the isolating static contact member 24, a grounding buffer 155 is disposed on a side of the grounding loop member 15 away from the moving contact member, the moving contact is buffered and stopped on the grounding buffer 155 when the moving contact following contact member 31 is switched on in place relative to the grounding loop member 15, the moving knife buffer 245 and the grounding buffer 155 are made of insulating materials, preferably PU materials, by means of the arrangement, the moving contact member 31 is effectively limited to move excessively, and the limiting and buffering effects of the moving contact member 31 are good.
Referring to fig. 1, 3 and 6, in one embodiment, the electric cabinet further includes a first lateral connecting frame 111 and a second lateral connecting frame 112, the operating shaft 33 and the rotation limiter 37 are connected to two side wall plates of the cabinet 1 through the first lateral connecting frame 111, the ground circuit member 15 is connected to two side wall plates of the cabinet 1 through the second lateral connecting frame 112, and two sides of the bottom insulating positioning plate 206 are respectively connected to the first lateral connecting frame 111 and the second lateral connecting frame 112 to support the electric conduction assembly 2.
Referring to fig. 10, in one embodiment, the conductive assemblies 2 and the three-position switch 3 are respectively provided with three groups, the three groups of conductive assemblies 2 and the three-position switch 3 are installed in the cabinet 1 along the longitudinal direction, the three groups of conductive assemblies 2 commonly use the same top mounting beam 16, and an insulating partition plate 208 is arranged between adjacent brackets 20.
Variations and modifications to the above would be obvious to persons skilled in the art to which the invention pertains from the foregoing description and teachings. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (8)
1. A 24KV switch cabinet, characterized by comprising the following steps:
the cabinet shell is provided with a switch chamber and a cable chamber which are arranged from top to bottom, and a cable sleeve is arranged in the cable chamber;
The electric conduction assembly is arranged in the switch chamber and comprises a bracket, and an insulating pull rod, a main bus assembly, a vacuum arc-extinguishing chamber component, an isolation static contact component and a three-station switch which are sequentially arranged on the bracket, wherein the cable sleeve is connected with the three-station switch through a cable bus;
The three-station switch comprises a moving contact component, a first insulating sleeve and a three-station operating mechanism, wherein one end of the moving contact component is rotationally connected with the cable bus, the first insulating sleeve is coated on the outer side of the whole moving contact component, the three-station operating mechanism is in transmission connection with the moving contact component, and the other end of the moving contact component is a moving contact extending out of the first insulating sleeve;
The three-station operating mechanism is used for driving the movable contact component to swing relatively so as to enable the movable contact to be in contact with or separate from the isolation static contact component, so that the control cable sleeve is connected or disconnected with the main bus component through the vacuum arc-extinguishing chamber component, and the movable contact is connected or disconnected with the grounding loop, so that the control cable sleeve is connected or disconnected with the grounding loop through the movable contact component;
the three-station operating mechanism comprises a driving device, an operating shaft and two groups of insulating connecting rod assemblies which are respectively positioned at two sides of the moving contact component, wherein the operating shaft is positioned at one side of the bracket, and the operating shaft is in transmission connection with the moving contact component through the two groups of insulating connecting rod assemblies;
The insulation connecting rod assembly comprises a first insulation connecting rod connected with the operation shaft, a second insulation connecting rod connected with the side part of the movable contact component and a third insulation connecting rod arranged between the first insulation connecting rod and the second insulation connecting rod, and two ends of the third insulation connecting rod are respectively connected with adjacent ends of the first edge connecting rod and the second edge connecting rod in a rotating way;
The side wall plate of the switch chamber is provided with a grounding loop component connected with a grounding loop, the isolating static contact component is provided with an isolating static contact, the grounding loop component is provided with three-phase grounding static contacts, and three stations of the three-station switch are respectively corresponding to a closing station where a moving contact is contacted with the isolating static contact, an isolating station where the moving contact is suspended between the three-phase grounding static contact and the isolating static contact and a grounding station where the moving contact is contacted with the three-phase grounding static contact;
The movable contact component is in contact fit with the ground circuit component through the movable avoidance opening when relatively swinging, and the insulating connecting rod component is in transmission connection with the movable contact component through the transmission avoidance opening;
The movable contact component and the operating shaft are respectively positioned at two sides of the insulating baffle;
the support is located between the movable avoidance opening and the side wall plate of the switch chamber and is provided with an insulating partition plate, and the front side and the rear side of the support are respectively provided with an insulating partition plate.
2. The 24KV switch cabinet according to claim 1, wherein the lower end of the movable contact component is rotatably connected with the upper end of the cable bus through a rotating shaft, and the lower end of the first insulating sleeve is positioned on two sides of the rotating shaft along the length direction and is respectively provided with an insulating blocking edge in a downward extending mode.
3. The 24KV switch cabinet according to claim 1, wherein the three-position operating mechanism further comprises a rotation limiting piece arranged on the operating shaft, a limiting buffer structure is correspondingly arranged on a side wall plate, close to one side of the operating shaft, of the switch chamber, a first limiting ejector rod and a second limiting ejector rod are respectively arranged on two sides of the rotation limiting piece, a first limiting surface is arranged at the end of the first limiting ejector rod, a second limiting surface is arranged at the end of the second limiting ejector rod, an included angle between the two limiting ejector rods corresponds to the swing position of the movable contact component between the isolation fixed contact component and the grounding circuit component, when the movable contact component swings in place relatively to the isolation fixed contact component, the first limiting ejector rod rotates to the first limiting surface to be abutted to the limiting buffer structure along with the operating shaft, and when the movable contact component swings in place relatively to the grounding circuit component, the second limiting ejector rod rotates to the second limiting surface to be abutted to the limiting buffer structure along with the operating shaft.
4. A 24KV switchgear as claimed in claim 3, wherein the limit buffer structure comprises a buffer baffle and a buffer pad, the buffer baffle being disposed on a side wall plate of the switchgear cabinet by the buffer pad.
5. The 24KV switch cabinet according to claim 1, wherein the main bus assembly comprises side expansion sleeves connected to two sides of a soft connecting piece, the vacuum arc-extinguishing chamber component is connected to the soft connecting piece, and the main bus assembly further comprises a breaker operating mechanism for driving the insulating pull rod to move up and down relatively through a transmission structure,
Thereby pushing the movable contact part of the vacuum arc-extinguishing chamber component to switch on or off through the conducting rod and the fixed contact part, and realizing the on-off of a circuit between the vacuum arc-extinguishing chamber component and the cable bus;
The circuit breaker operating mechanism is used for driving the main shaft to rotate relatively in forward and reverse directions and further driving the insulating pull rod to move up and down through the transmission connecting rod;
The left wall plate and the right wall plate of the switch chamber are positioned on the upper side and the lower side of the side expansion sleeve respectively and are provided with supporting beams.
6. The 24KV switchgear of claim 1, further comprising a top mounting beam and a bottom mounting beam, the rack top being connected to the switch cabinet top by the top mounting beam, the rack bottom being mounted to the switch cabinet bottom by the bottom mounting beam;
The support comprises two insulating isolation frames which are oppositely arranged, an upper positioning plate, a middle positioning plate and a bottom insulating positioning plate which are arranged between the insulating isolation frames at two sides from top to bottom, wherein the upper end of a vacuum arc-extinguishing chamber component is connected with the upper positioning plate, the lower end of the vacuum arc-extinguishing chamber component is connected with the middle positioning plate, an isolating static contact component is connected with the bottom of the middle positioning plate, a three-station switch is arranged between the middle positioning plate and the bottom insulating positioning plate, a corrugated sleeve is vertically arranged on the bottom insulating positioning plate, and a cable bus is arranged in the corrugated sleeve and extends out from the upper end of the corrugated sleeve to be rotationally connected with the lower end of a moving contact component.
7. The 24KV switch cabinet according to claim 1, wherein a cable bushing is arranged at the outer end of the cable bushing, an insulating cap is sleeved at the lower end of the cable bus, a first connecting skirt edge and a second connecting skirt edge are outwards extended from the side part of the insulating cap, the second connecting skirt edge is located at the outer periphery of the first connecting skirt edge, two groups of clamping protrusions are arranged on the inner periphery of the first connecting skirt edge along the axial direction, a splicing cavity matched with the shapes of the first connecting skirt edge and the second connecting skirt edge is arranged on the outer side of the cable bushing, and clamping grooves matched with the two groups of clamping protrusions are formed on the inner periphery of the splicing cavity.
8. The 24KV switch cabinet according to claim 1, wherein a moving knife buffer is arranged on one side, far away from the moving contact, of the isolation static contact component, when the moving contact is switched on in place along with the moving contact component relative to the isolation static contact component, the moving contact is buffered and stopped on the moving knife buffer, and an electric field control piece is arranged at the lower end of the isolation static contact component;
The ground return circuit component is kept away from moving contact component one side is equipped with the ground buffer, the moving contact is along with moving contact component closes a floodgate in place relatively the ground return circuit component, moving contact buffering stop is in on the ground buffer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411667556.6A CN119171319B (en) | 2024-11-21 | 2024-11-21 | 24KV switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411667556.6A CN119171319B (en) | 2024-11-21 | 2024-11-21 | 24KV switch cabinet |
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| Publication Number | Publication Date |
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| CN119171319A CN119171319A (en) | 2024-12-20 |
| CN119171319B true CN119171319B (en) | 2025-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202411667556.6A Active CN119171319B (en) | 2024-11-21 | 2024-11-21 | 24KV switch cabinet |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201781210U (en) * | 2010-08-30 | 2011-03-30 | 荥阳市电业局 | Electric arc separation insulating sleeve type voltage transformer trolley |
| CN116344257A (en) * | 2023-03-15 | 2023-06-27 | 平高集团有限公司 | A linkage switch and circuit breaker cabinet |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846335B (en) * | 2016-05-10 | 2018-02-02 | 广东紫光电气有限公司 | A kind of 12kV current-carrying 1250A solid insulation switch cabinets |
| CN219659277U (en) * | 2023-04-14 | 2023-09-08 | 天津艾塔电气技术有限责任公司 | Environment-friendly gas-insulated ring main unit |
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- 2024-11-21 CN CN202411667556.6A patent/CN119171319B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201781210U (en) * | 2010-08-30 | 2011-03-30 | 荥阳市电业局 | Electric arc separation insulating sleeve type voltage transformer trolley |
| CN116344257A (en) * | 2023-03-15 | 2023-06-27 | 平高集团有限公司 | A linkage switch and circuit breaker cabinet |
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| Publication number | Publication date |
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| CN119171319A (en) | 2024-12-20 |
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